net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33 #include "fils_aead.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  36 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  37 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  38 #define IEEE80211_AUTH_MAX_TRIES        3
  39 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  40 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  41 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  42 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  43 #define IEEE80211_ASSOC_MAX_TRIES       3
  44
  45 static int max_nullfunc_tries = 2;
  46 module_param(max_nullfunc_tries, int, 0644);
  47 MODULE_PARM_DESC(max_nullfunc_tries,
  48                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  49
  50 static int max_probe_tries = 5;
  51 module_param(max_probe_tries, int, 0644);
  52 MODULE_PARM_DESC(max_probe_tries,
  53                  "Maximum probe tries before disconnecting (reason 4).");
  54
  55 /*
  56  * Beacon loss timeout is calculated as N frames times the
  57  * advertised beacon interval.  This may need to be somewhat
  58  * higher than what hardware might detect to account for
  59  * delays in the host processing frames. But since we also
  60  * probe on beacon miss before declaring the connection lost
  61  * default to what we want.
  62  */
  63 static int beacon_loss_count = 7;
  64 module_param(beacon_loss_count, int, 0644);
  65 MODULE_PARM_DESC(beacon_loss_count,
  66                  "Number of beacon intervals before we decide beacon was lost.");
  67
  68 /*
  69  * Time the connection can be idle before we probe
  70  * it to see if we can still talk to the AP.
  71  */
  72 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  73 /*
  74  * Time we wait for a probe response after sending
  75  * a probe request because of beacon loss or for
  76  * checking the connection still works.
  77  */
  78 static int probe_wait_ms = 500;
  79 module_param(probe_wait_ms, int, 0644);
  80 MODULE_PARM_DESC(probe_wait_ms,
  81                  "Maximum time(ms) to wait for probe response"
  82                  " before disconnecting (reason 4).");
  83
  84 /*
  85  * How many Beacon frames need to have been used in average signal strength
  86  * before starting to indicate signal change events.
  87  */
  88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  89
  90 /*
  91  * We can have multiple work items (and connection probing)
  92  * scheduling this timer, but we need to take care to only
  93  * reschedule it when it should fire _earlier_ than it was
  94  * asked for before, or if it's not pending right now. This
  95  * function ensures that. Note that it then is required to
  96  * run this function for all timeouts after the first one
  97  * has happened -- the work that runs from this timer will
  98  * do that.
  99  */
 100 static void run_again(struct ieee80211_sub_if_data *sdata,
 101                       unsigned long timeout)
 102 {
 103         sdata_assert_lock(sdata);
 104
 105         if (!timer_pending(&sdata->u.mgd.timer) ||
 106             time_before(timeout, sdata->u.mgd.timer.expires))
 107                 mod_timer(&sdata->u.mgd.timer, timeout);
 108 }
 109
 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 111 {
 112         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 113                 return;
 114
 115         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 116                 return;
 117
 118         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 119                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 120 }
 121
 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 123 {
 124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 125
 126         if (unlikely(!ifmgd->associated))
 127                 return;
 128
 129         if (ifmgd->probe_send_count)
 130                 ifmgd->probe_send_count = 0;
 131
 132         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 133                 return;
 134
 135         mod_timer(&ifmgd->conn_mon_timer,
 136                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 137 }
 138
 139 static int ecw2cw(int ecw)
 140 {
 141         return (1 << ecw) - 1;
 142 }
 143
 144 static u32
 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 146                              struct ieee80211_supported_band *sband,
 147                              struct ieee80211_channel *channel,
 148                              const struct ieee80211_ht_cap *ht_cap,
 149                              const struct ieee80211_ht_operation *ht_oper,
 150                              const struct ieee80211_vht_operation *vht_oper,
 151                              struct cfg80211_chan_def *chandef, bool tracking)
 152 {
 153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 154         struct cfg80211_chan_def vht_chandef;
 155         struct ieee80211_sta_ht_cap sta_ht_cap;
 156         u32 ht_cfreq, ret;
 157
 158         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 159         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 160
 161         chandef->chan = channel;
 162         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 163         chandef->center_freq1 = channel->center_freq;
 164         chandef->center_freq2 = 0;
 165
 166         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 167                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 168                 goto out;
 169         }
 170
 171         chandef->width = NL80211_CHAN_WIDTH_20;
 172
 173         if (!(ht_cap->cap_info &
 174               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 175                 ret = IEEE80211_STA_DISABLE_40MHZ;
 176                 vht_chandef = *chandef;
 177                 goto out;
 178         }
 179
 180         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 181                                                   channel->band);
 182         /* check that channel matches the right operating channel */
 183         if (!tracking && channel->center_freq != ht_cfreq) {
 184                 /*
 185                  * It's possible that some APs are confused here;
 186                  * Netgear WNDR3700 sometimes reports 4 higher than
 187                  * the actual channel in association responses, but
 188                  * since we look at probe response/beacon data here
 189                  * it should be OK.
 190                  */
 191                 sdata_info(sdata,
 192                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 193                            channel->center_freq, ht_cfreq,
 194                            ht_oper->primary_chan, channel->band);
 195                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 196                 goto out;
 197         }
 198
 199         /* check 40 MHz support, if we have it */
 200         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 201                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 202         } else {
 203                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 204                 ret = IEEE80211_STA_DISABLE_VHT;
 205                 /* also mark 40 MHz disabled */
 206                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 207                 goto out;
 208         }
 209
 210         if (!vht_oper || !sband->vht_cap.vht_supported) {
 211                 ret = IEEE80211_STA_DISABLE_VHT;
 212                 goto out;
 213         }
 214
 215         vht_chandef = *chandef;
 216         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 217                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 218                         sdata_info(sdata,
 219                                    "AP VHT information is invalid, disable VHT\n");
 220                 ret = IEEE80211_STA_DISABLE_VHT;
 221                 goto out;
 222         }
 223
 224         if (!cfg80211_chandef_valid(&vht_chandef)) {
 225                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 226                         sdata_info(sdata,
 227                                    "AP VHT information is invalid, disable VHT\n");
 228                 ret = IEEE80211_STA_DISABLE_VHT;
 229                 goto out;
 230         }
 231
 232         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 233                 ret = 0;
 234                 goto out;
 235         }
 236
 237         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 238                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 239                         sdata_info(sdata,
 240                                    "AP VHT information doesn't match HT, disable VHT\n");
 241                 ret = IEEE80211_STA_DISABLE_VHT;
 242                 goto out;
 243         }
 244
 245         *chandef = vht_chandef;
 246
 247         ret = 0;
 248
 249 out:
 250         /*
 251          * When tracking the current AP, don't do any further checks if the
 252          * new chandef is identical to the one we're currently using for the
 253          * connection. This keeps us from playing ping-pong with regulatory,
 254          * without it the following can happen (for example):
 255          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 256          *  - AP advertises regdom US
 257          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 258          *  - the code below detects an unsupported channel, downgrades, and
 259          *    we disconnect from the AP in the caller
 260          *  - disconnect causes CRDA to reload world regdomain and the game
 261          *    starts anew.
 262          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 263          *
 264          * It seems possible that there are still scenarios with CSA or real
 265          * bandwidth changes where a this could happen, but those cases are
 266          * less common and wouldn't completely prevent using the AP.
 267          */
 268         if (tracking &&
 269             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 270                 return ret;
 271
 272         /* don't print the message below for VHT mismatch if VHT is disabled */
 273         if (ret & IEEE80211_STA_DISABLE_VHT)
 274                 vht_chandef = *chandef;
 275
 276         /*
 277          * Ignore the DISABLED flag when we're already connected and only
 278          * tracking the APs beacon for bandwidth changes - otherwise we
 279          * might get disconnected here if we connect to an AP, update our
 280          * regulatory information based on the AP's country IE and the
 281          * information we have is wrong/outdated and disables the channel
 282          * that we're actually using for the connection to the AP.
 283          */
 284         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 285                                         tracking ? 0 :
 286                                                    IEEE80211_CHAN_DISABLED)) {
 287                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 288                         ret = IEEE80211_STA_DISABLE_HT |
 289                               IEEE80211_STA_DISABLE_VHT;
 290                         break;
 291                 }
 292
 293                 ret |= ieee80211_chandef_downgrade(chandef);
 294         }
 295
 296         if (chandef->width != vht_chandef.width && !tracking)
 297                 sdata_info(sdata,
 298                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 299
 300         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 301         return ret;
 302 }
 303
 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 305                                struct sta_info *sta,
 306                                const struct ieee80211_ht_cap *ht_cap,
 307                                const struct ieee80211_ht_operation *ht_oper,
 308                                const struct ieee80211_vht_operation *vht_oper,
 309                                const u8 *bssid, u32 *changed)
 310 {
 311         struct ieee80211_local *local = sdata->local;
 312         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 313         struct ieee80211_supported_band *sband;
 314         struct ieee80211_channel *chan;
 315         struct cfg80211_chan_def chandef;
 316         u16 ht_opmode;
 317         u32 flags;
 318         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 319         int ret;
 320
 321         /* if HT was/is disabled, don't track any bandwidth changes */
 322         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 323                 return 0;
 324
 325         /* don't check VHT if we associated as non-VHT station */
 326         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 327                 vht_oper = NULL;
 328
 329         if (WARN_ON_ONCE(!sta))
 330                 return -EINVAL;
 331
 332         /*
 333          * if bss configuration changed store the new one -
 334          * this may be applicable even if channel is identical
 335          */
 336         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 337         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 338                 *changed |= BSS_CHANGED_HT;
 339                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 340         }
 341
 342         chan = sdata->vif.bss_conf.chandef.chan;
 343         sband = local->hw.wiphy->bands[chan->band];
 344
 345         /* calculate new channel (type) based on HT/VHT operation IEs */
 346         flags = ieee80211_determine_chantype(sdata, sband, chan,
 347                                              ht_cap, ht_oper, vht_oper,
 348                                              &chandef, true);
 349
 350         /*
 351          * Downgrade the new channel if we associated with restricted
 352          * capabilities. For example, if we associated as a 20 MHz STA
 353          * to a 40 MHz AP (due to regulatory, capabilities or config
 354          * reasons) then switching to a 40 MHz channel now won't do us
 355          * any good -- we couldn't use it with the AP.
 356          */
 357         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 358             chandef.width == NL80211_CHAN_WIDTH_80P80)
 359                 flags |= ieee80211_chandef_downgrade(&chandef);
 360         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 361             chandef.width == NL80211_CHAN_WIDTH_160)
 362                 flags |= ieee80211_chandef_downgrade(&chandef);
 363         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 364             chandef.width > NL80211_CHAN_WIDTH_20)
 365                 flags |= ieee80211_chandef_downgrade(&chandef);
 366
 367         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 368                 return 0;
 369
 370         sdata_info(sdata,
 371                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 372                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 373                    chandef.center_freq1, chandef.center_freq2);
 374
 375         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 376                                       IEEE80211_STA_DISABLE_VHT |
 377                                       IEEE80211_STA_DISABLE_40MHZ |
 378                                       IEEE80211_STA_DISABLE_80P80MHZ |
 379                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 380             !cfg80211_chandef_valid(&chandef)) {
 381                 sdata_info(sdata,
 382                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 383                            ifmgd->bssid);
 384                 return -EINVAL;
 385         }
 386
 387         switch (chandef.width) {
 388         case NL80211_CHAN_WIDTH_20_NOHT:
 389         case NL80211_CHAN_WIDTH_20:
 390                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 391                 break;
 392         case NL80211_CHAN_WIDTH_40:
 393                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 394                 break;
 395         case NL80211_CHAN_WIDTH_80:
 396                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 397                 break;
 398         case NL80211_CHAN_WIDTH_80P80:
 399         case NL80211_CHAN_WIDTH_160:
 400                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 401                 break;
 402         default:
 403                 return -EINVAL;
 404         }
 405
 406         if (new_sta_bw > sta->cur_max_bandwidth)
 407                 new_sta_bw = sta->cur_max_bandwidth;
 408
 409         if (new_sta_bw < sta->sta.bandwidth) {
 410                 sta->sta.bandwidth = new_sta_bw;
 411                 rate_control_rate_update(local, sband, sta,
 412                                          IEEE80211_RC_BW_CHANGED);
 413         }
 414
 415         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 416         if (ret) {
 417                 sdata_info(sdata,
 418                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 419                            ifmgd->bssid);
 420                 return ret;
 421         }
 422
 423         if (new_sta_bw > sta->sta.bandwidth) {
 424                 sta->sta.bandwidth = new_sta_bw;
 425                 rate_control_rate_update(local, sband, sta,
 426                                          IEEE80211_RC_BW_CHANGED);
 427         }
 428
 429         return 0;
 430 }
 431
 432 /* frame sending functions */
 433
 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 435                                 struct sk_buff *skb, u8 ap_ht_param,
 436                                 struct ieee80211_supported_band *sband,
 437                                 struct ieee80211_channel *channel,
 438                                 enum ieee80211_smps_mode smps)
 439 {
 440         u8 *pos;
 441         u32 flags = channel->flags;
 442         u16 cap;
 443         struct ieee80211_sta_ht_cap ht_cap;
 444
 445         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 446
 447         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 448         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 449
 450         /* determine capability flags */
 451         cap = ht_cap.cap;
 452
 453         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 454         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 455                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 456                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 457                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 458                 }
 459                 break;
 460         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 461                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 462                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 463                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 464                 }
 465                 break;
 466         }
 467
 468         /*
 469          * If 40 MHz was disabled associate as though we weren't
 470          * capable of 40 MHz -- some broken APs will never fall
 471          * back to trying to transmit in 20 MHz.
 472          */
 473         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 474                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 475                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 476         }
 477
 478         /* set SM PS mode properly */
 479         cap &= ~IEEE80211_HT_CAP_SM_PS;
 480         switch (smps) {
 481         case IEEE80211_SMPS_AUTOMATIC:
 482         case IEEE80211_SMPS_NUM_MODES:
 483                 WARN_ON(1);
 484         case IEEE80211_SMPS_OFF:
 485                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 486                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 487                 break;
 488         case IEEE80211_SMPS_STATIC:
 489                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 490                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 491                 break;
 492         case IEEE80211_SMPS_DYNAMIC:
 493                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 494                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 495                 break;
 496         }
 497
 498         /* reserve and fill IE */
 499         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 500         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 501 }
 502
 503 /* This function determines vht capability flags for the association
 504  * and builds the IE.
 505  * Note - the function may set the owner of the MU-MIMO capability
 506  */
 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 508                                  struct sk_buff *skb,
 509                                  struct ieee80211_supported_band *sband,
 510                                  struct ieee80211_vht_cap *ap_vht_cap)
 511 {
 512         struct ieee80211_local *local = sdata->local;
 513         u8 *pos;
 514         u32 cap;
 515         struct ieee80211_sta_vht_cap vht_cap;
 516         u32 mask, ap_bf_sts, our_bf_sts;
 517
 518         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 519
 520         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 521         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 522
 523         /* determine capability flags */
 524         cap = vht_cap.cap;
 525
 526         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 527                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 528
 529                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 530                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 531                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 532                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 533         }
 534
 535         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 536                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 537                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 538         }
 539
 540         /*
 541          * Some APs apparently get confused if our capabilities are better
 542          * than theirs, so restrict what we advertise in the assoc request.
 543          */
 544         if (!(ap_vht_cap->vht_cap_info &
 545                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 546                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 547                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 548         else if (!(ap_vht_cap->vht_cap_info &
 549                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 550                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 551
 552         /*
 553          * If some other vif is using the MU-MIMO capablity we cannot associate
 554          * using MU-MIMO - this will lead to contradictions in the group-id
 555          * mechanism.
 556          * Ownership is defined since association request, in order to avoid
 557          * simultaneous associations with MU-MIMO.
 558          */
 559         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 560                 bool disable_mu_mimo = false;
 561                 struct ieee80211_sub_if_data *other;
 562
 563                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 564                         if (other->vif.mu_mimo_owner) {
 565                                 disable_mu_mimo = true;
 566                                 break;
 567                         }
 568                 }
 569                 if (disable_mu_mimo)
 570                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 571                 else
 572                         sdata->vif.mu_mimo_owner = true;
 573         }
 574
 575         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 576
 577         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 578         our_bf_sts = cap & mask;
 579
 580         if (ap_bf_sts < our_bf_sts) {
 581                 cap &= ~mask;
 582                 cap |= ap_bf_sts;
 583         }
 584
 585         /* reserve and fill IE */
 586         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 587         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 588 }
 589
 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 591 {
 592         struct ieee80211_local *local = sdata->local;
 593         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 594         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 595         struct sk_buff *skb;
 596         struct ieee80211_mgmt *mgmt;
 597         u8 *pos, qos_info;
 598         size_t offset = 0, noffset;
 599         int i, count, rates_len, supp_rates_len, shift;
 600         u16 capab;
 601         struct ieee80211_supported_band *sband;
 602         struct ieee80211_chanctx_conf *chanctx_conf;
 603         struct ieee80211_channel *chan;
 604         u32 rate_flags, rates = 0;
 605
 606         sdata_assert_lock(sdata);
 607
 608         rcu_read_lock();
 609         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 610         if (WARN_ON(!chanctx_conf)) {
 611                 rcu_read_unlock();
 612                 return;
 613         }
 614         chan = chanctx_conf->def.chan;
 615         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 616         rcu_read_unlock();
 617         sband = local->hw.wiphy->bands[chan->band];
 618         shift = ieee80211_vif_get_shift(&sdata->vif);
 619
 620         if (assoc_data->supp_rates_len) {
 621                 /*
 622                  * Get all rates supported by the device and the AP as
 623                  * some APs don't like getting a superset of their rates
 624                  * in the association request (e.g. D-Link DAP 1353 in
 625                  * b-only mode)...
 626                  */
 627                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 628                                                      assoc_data->supp_rates,
 629                                                      assoc_data->supp_rates_len,
 630                                                      &rates);
 631         } else {
 632                 /*
 633                  * In case AP not provide any supported rates information
 634                  * before association, we send information element(s) with
 635                  * all rates that we support.
 636                  */
 637                 rates_len = 0;
 638                 for (i = 0; i < sband->n_bitrates; i++) {
 639                         if ((rate_flags & sband->bitrates[i].flags)
 640                             != rate_flags)
 641                                 continue;
 642                         rates |= BIT(i);
 643                         rates_len++;
 644                 }
 645         }
 646
 647         skb = alloc_skb(local->hw.extra_tx_headroom +
 648                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 649                         2 + assoc_data->ssid_len + /* SSID */
 650                         4 + rates_len + /* (extended) rates */
 651                         4 + /* power capability */
 652                         2 + 2 * sband->n_channels + /* supported channels */
 653                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 654                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 655                         assoc_data->ie_len + /* extra IEs */
 656                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 657                         9, /* WMM */
 658                         GFP_KERNEL);
 659         if (!skb)
 660                 return;
 661
 662         skb_reserve(skb, local->hw.extra_tx_headroom);
 663
 664         capab = WLAN_CAPABILITY_ESS;
 665
 666         if (sband->band == NL80211_BAND_2GHZ) {
 667                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 668                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 669         }
 670
 671         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 672                 capab |= WLAN_CAPABILITY_PRIVACY;
 673
 674         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 675             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 676                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 677
 678         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 679                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 680
 681         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 682         memset(mgmt, 0, 24);
 683         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 684         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 685         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 686
 687         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 688                 skb_put(skb, 10);
 689                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 690                                                   IEEE80211_STYPE_REASSOC_REQ);
 691                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 692                 mgmt->u.reassoc_req.listen_interval =
 693                                 cpu_to_le16(local->hw.conf.listen_interval);
 694                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 695                        ETH_ALEN);
 696         } else {
 697                 skb_put(skb, 4);
 698                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 699                                                   IEEE80211_STYPE_ASSOC_REQ);
 700                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 701                 mgmt->u.assoc_req.listen_interval =
 702                                 cpu_to_le16(local->hw.conf.listen_interval);
 703         }
 704
 705         /* SSID */
 706         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 707         *pos++ = WLAN_EID_SSID;
 708         *pos++ = assoc_data->ssid_len;
 709         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 710
 711         /* add all rates which were marked to be used above */
 712         supp_rates_len = rates_len;
 713         if (supp_rates_len > 8)
 714                 supp_rates_len = 8;
 715
 716         pos = skb_put(skb, supp_rates_len + 2);
 717         *pos++ = WLAN_EID_SUPP_RATES;
 718         *pos++ = supp_rates_len;
 719
 720         count = 0;
 721         for (i = 0; i < sband->n_bitrates; i++) {
 722                 if (BIT(i) & rates) {
 723                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 724                                                 5 * (1 << shift));
 725                         *pos++ = (u8) rate;
 726                         if (++count == 8)
 727                                 break;
 728                 }
 729         }
 730
 731         if (rates_len > count) {
 732                 pos = skb_put(skb, rates_len - count + 2);
 733                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 734                 *pos++ = rates_len - count;
 735
 736                 for (i++; i < sband->n_bitrates; i++) {
 737                         if (BIT(i) & rates) {
 738                                 int rate;
 739                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 740                                                     5 * (1 << shift));
 741                                 *pos++ = (u8) rate;
 742                         }
 743                 }
 744         }
 745
 746         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 747             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 748                 pos = skb_put(skb, 4);
 749                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 750                 *pos++ = 2;
 751                 *pos++ = 0; /* min tx power */
 752                  /* max tx power */
 753                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 754         }
 755
 756         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 757                 /* TODO: get this in reg domain format */
 758                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 759                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 760                 *pos++ = 2 * sband->n_channels;
 761                 for (i = 0; i < sband->n_channels; i++) {
 762                         *pos++ = ieee80211_frequency_to_channel(
 763                                         sband->channels[i].center_freq);
 764                         *pos++ = 1; /* one channel in the subband*/
 765                 }
 766         }
 767
 768         /* if present, add any custom IEs that go before HT */
 769         if (assoc_data->ie_len) {
 770                 static const u8 before_ht[] = {
 771                         WLAN_EID_SSID,
 772                         WLAN_EID_SUPP_RATES,
 773                         WLAN_EID_EXT_SUPP_RATES,
 774                         WLAN_EID_PWR_CAPABILITY,
 775                         WLAN_EID_SUPPORTED_CHANNELS,
 776                         WLAN_EID_RSN,
 777                         WLAN_EID_QOS_CAPA,
 778                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 779                         WLAN_EID_MOBILITY_DOMAIN,
 780                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 781                         WLAN_EID_RIC_DATA,              /* reassoc only */
 782                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 783                 };
 784                 static const u8 after_ric[] = {
 785                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 786                         WLAN_EID_HT_CAPABILITY,
 787                         WLAN_EID_BSS_COEX_2040,
 788                         WLAN_EID_EXT_CAPABILITY,
 789                         WLAN_EID_QOS_TRAFFIC_CAPA,
 790                         WLAN_EID_TIM_BCAST_REQ,
 791                         WLAN_EID_INTERWORKING,
 792                         /* 60GHz doesn't happen right now */
 793                         WLAN_EID_VHT_CAPABILITY,
 794                         WLAN_EID_OPMODE_NOTIF,
 795                 };
 796
 797                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 798                                                  assoc_data->ie_len,
 799                                                  before_ht,
 800                                                  ARRAY_SIZE(before_ht),
 801                                                  after_ric,
 802                                                  ARRAY_SIZE(after_ric),
 803                                                  offset);
 804                 pos = skb_put(skb, noffset - offset);
 805                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 806                 offset = noffset;
 807         }
 808
 809         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 810                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 811                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 812
 813         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 814                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 815                                     sband, chan, sdata->smps_mode);
 816
 817         /* if present, add any custom IEs that go before VHT */
 818         if (assoc_data->ie_len) {
 819                 static const u8 before_vht[] = {
 820                         WLAN_EID_SSID,
 821                         WLAN_EID_SUPP_RATES,
 822                         WLAN_EID_EXT_SUPP_RATES,
 823                         WLAN_EID_PWR_CAPABILITY,
 824                         WLAN_EID_SUPPORTED_CHANNELS,
 825                         WLAN_EID_RSN,
 826                         WLAN_EID_QOS_CAPA,
 827                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 828                         WLAN_EID_MOBILITY_DOMAIN,
 829                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 830                         WLAN_EID_HT_CAPABILITY,
 831                         WLAN_EID_BSS_COEX_2040,
 832                         WLAN_EID_EXT_CAPABILITY,
 833                         WLAN_EID_QOS_TRAFFIC_CAPA,
 834                         WLAN_EID_TIM_BCAST_REQ,
 835                         WLAN_EID_INTERWORKING,
 836                 };
 837
 838                 /* RIC already taken above, so no need to handle here anymore */
 839                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 840                                              before_vht, ARRAY_SIZE(before_vht),
 841                                              offset);
 842                 pos = skb_put(skb, noffset - offset);
 843                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 844                 offset = noffset;
 845         }
 846
 847         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 848                 ieee80211_add_vht_ie(sdata, skb, sband,
 849                                      &assoc_data->ap_vht_cap);
 850
 851         /* if present, add any custom non-vendor IEs that go after HT */
 852         if (assoc_data->ie_len) {
 853                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 854                                                     assoc_data->ie_len,
 855                                                     offset);
 856                 pos = skb_put(skb, noffset - offset);
 857                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 858                 offset = noffset;
 859         }
 860
 861         if (assoc_data->wmm) {
 862                 if (assoc_data->uapsd) {
 863                         qos_info = ifmgd->uapsd_queues;
 864                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 865                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 866                 } else {
 867                         qos_info = 0;
 868                 }
 869
 870                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 871         }
 872
 873         /* add any remaining custom (i.e. vendor specific here) IEs */
 874         if (assoc_data->ie_len) {
 875                 noffset = assoc_data->ie_len;
 876                 pos = skb_put(skb, noffset - offset);
 877                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 878         }
 879
 880         if (assoc_data->fils_kek_len &&
 881             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
 882                 dev_kfree_skb(skb);
 883                 return;
 884         }
 885
 886         drv_mgd_prepare_tx(local, sdata);
 887
 888         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 889         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 890                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 891                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 892         ieee80211_tx_skb(sdata, skb);
 893 }
 894
 895 void ieee80211_send_pspoll(struct ieee80211_local *local,
 896                            struct ieee80211_sub_if_data *sdata)
 897 {
 898         struct ieee80211_pspoll *pspoll;
 899         struct sk_buff *skb;
 900
 901         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 902         if (!skb)
 903                 return;
 904
 905         pspoll = (struct ieee80211_pspoll *) skb->data;
 906         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 907
 908         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 909         ieee80211_tx_skb(sdata, skb);
 910 }
 911
 912 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 913                              struct ieee80211_sub_if_data *sdata,
 914                              bool powersave)
 915 {
 916         struct sk_buff *skb;
 917         struct ieee80211_hdr_3addr *nullfunc;
 918         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 919
 920         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 921         if (!skb)
 922                 return;
 923
 924         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 925         if (powersave)
 926                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 927
 928         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 929                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 930
 931         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 932                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 933
 934         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 935                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 936
 937         ieee80211_tx_skb(sdata, skb);
 938 }
 939
 940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 941                                           struct ieee80211_sub_if_data *sdata)
 942 {
 943         struct sk_buff *skb;
 944         struct ieee80211_hdr *nullfunc;
 945         __le16 fc;
 946
 947         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 948                 return;
 949
 950         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 951         if (!skb)
 952                 return;
 953
 954         skb_reserve(skb, local->hw.extra_tx_headroom);
 955
 956         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 957         memset(nullfunc, 0, 30);
 958         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 959                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 960         nullfunc->frame_control = fc;
 961         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 962         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 963         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 964         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 965
 966         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 967         ieee80211_tx_skb(sdata, skb);
 968 }
 969
 970 /* spectrum management related things */
 971 static void ieee80211_chswitch_work(struct work_struct *work)
 972 {
 973         struct ieee80211_sub_if_data *sdata =
 974                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 975         struct ieee80211_local *local = sdata->local;
 976         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 977         int ret;
 978
 979         if (!ieee80211_sdata_running(sdata))
 980                 return;
 981
 982         sdata_lock(sdata);
 983         mutex_lock(&local->mtx);
 984         mutex_lock(&local->chanctx_mtx);
 985
 986         if (!ifmgd->associated)
 987                 goto out;
 988
 989         if (!sdata->vif.csa_active)
 990                 goto out;
 991
 992         /*
 993          * using reservation isn't immediate as it may be deferred until later
 994          * with multi-vif. once reservation is complete it will re-schedule the
 995          * work with no reserved_chanctx so verify chandef to check if it
 996          * completed successfully
 997          */
 998
 999         if (sdata->reserved_chanctx) {
1000                 /*
1001                  * with multi-vif csa driver may call ieee80211_csa_finish()
1002                  * many times while waiting for other interfaces to use their
1003                  * reservations
1004                  */
1005                 if (sdata->reserved_ready)
1006                         goto out;
1007
1008                 ret = ieee80211_vif_use_reserved_context(sdata);
1009                 if (ret) {
1010                         sdata_info(sdata,
1011                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1012                                    ret);
1013                         ieee80211_queue_work(&sdata->local->hw,
1014                                              &ifmgd->csa_connection_drop_work);
1015                         goto out;
1016                 }
1017
1018                 goto out;
1019         }
1020
1021         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022                                         &sdata->csa_chandef)) {
1023                 sdata_info(sdata,
1024                            "failed to finalize channel switch, disconnecting\n");
1025                 ieee80211_queue_work(&sdata->local->hw,
1026                                      &ifmgd->csa_connection_drop_work);
1027                 goto out;
1028         }
1029
1030         /* XXX: shouldn't really modify cfg80211-owned data! */
1031         ifmgd->associated->channel = sdata->csa_chandef.chan;
1032
1033         ifmgd->csa_waiting_bcn = true;
1034
1035         ieee80211_sta_reset_beacon_monitor(sdata);
1036         ieee80211_sta_reset_conn_monitor(sdata);
1037
1038 out:
1039         mutex_unlock(&local->chanctx_mtx);
1040         mutex_unlock(&local->mtx);
1041         sdata_unlock(sdata);
1042 }
1043
1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1045 {
1046         struct ieee80211_local *local = sdata->local;
1047         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048         int ret;
1049
1050         sdata_assert_lock(sdata);
1051
1052         WARN_ON(!sdata->vif.csa_active);
1053
1054         if (sdata->csa_block_tx) {
1055                 ieee80211_wake_vif_queues(local, sdata,
1056                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1057                 sdata->csa_block_tx = false;
1058         }
1059
1060         sdata->vif.csa_active = false;
1061         ifmgd->csa_waiting_bcn = false;
1062
1063         ret = drv_post_channel_switch(sdata);
1064         if (ret) {
1065                 sdata_info(sdata,
1066                            "driver post channel switch failed, disconnecting\n");
1067                 ieee80211_queue_work(&local->hw,
1068                                      &ifmgd->csa_connection_drop_work);
1069                 return;
1070         }
1071
1072         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1073 }
1074
1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1076 {
1077         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
1080         trace_api_chswitch_done(sdata, success);
1081         if (!success) {
1082                 sdata_info(sdata,
1083                            "driver channel switch failed, disconnecting\n");
1084                 ieee80211_queue_work(&sdata->local->hw,
1085                                      &ifmgd->csa_connection_drop_work);
1086         } else {
1087                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1088         }
1089 }
1090 EXPORT_SYMBOL(ieee80211_chswitch_done);
1091
1092 static void ieee80211_chswitch_timer(unsigned long data)
1093 {
1094         struct ieee80211_sub_if_data *sdata =
1095                 (struct ieee80211_sub_if_data *) data;
1096
1097         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1098 }
1099
1100 static void
1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102                                  u64 timestamp, u32 device_timestamp,
1103                                  struct ieee802_11_elems *elems,
1104                                  bool beacon)
1105 {
1106         struct ieee80211_local *local = sdata->local;
1107         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108         struct cfg80211_bss *cbss = ifmgd->associated;
1109         struct ieee80211_chanctx_conf *conf;
1110         struct ieee80211_chanctx *chanctx;
1111         enum nl80211_band current_band;
1112         struct ieee80211_csa_ie csa_ie;
1113         struct ieee80211_channel_switch ch_switch;
1114         int res;
1115
1116         sdata_assert_lock(sdata);
1117
1118         if (!cbss)
1119                 return;
1120
1121         if (local->scanning)
1122                 return;
1123
1124         /* disregard subsequent announcements if we are already processing */
1125         if (sdata->vif.csa_active)
1126                 return;
1127
1128         current_band = cbss->channel->band;
1129         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1130                                            ifmgd->flags,
1131                                            ifmgd->associated->bssid, &csa_ie);
1132         if (res < 0)
1133                 ieee80211_queue_work(&local->hw,
1134                                      &ifmgd->csa_connection_drop_work);
1135         if (res)
1136                 return;
1137
1138         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1139                                      IEEE80211_CHAN_DISABLED)) {
1140                 sdata_info(sdata,
1141                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1142                            ifmgd->associated->bssid,
1143                            csa_ie.chandef.chan->center_freq,
1144                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1145                            csa_ie.chandef.center_freq2);
1146                 ieee80211_queue_work(&local->hw,
1147                                      &ifmgd->csa_connection_drop_work);
1148                 return;
1149         }
1150
1151         if (cfg80211_chandef_identical(&csa_ie.chandef,
1152                                        &sdata->vif.bss_conf.chandef)) {
1153                 if (ifmgd->csa_ignored_same_chan)
1154                         return;
1155                 sdata_info(sdata,
1156                            "AP %pM tries to chanswitch to same channel, ignore\n",
1157                            ifmgd->associated->bssid);
1158                 ifmgd->csa_ignored_same_chan = true;
1159                 return;
1160         }
1161
1162         /*
1163          * Drop all TDLS peers - either we disconnect or move to a different
1164          * channel from this point on. There's no telling what our peer will do.
1165          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1166          * have an incompatible wider chandef.
1167          */
1168         ieee80211_teardown_tdls_peers(sdata);
1169
1170         mutex_lock(&local->mtx);
1171         mutex_lock(&local->chanctx_mtx);
1172         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1173                                          lockdep_is_held(&local->chanctx_mtx));
1174         if (!conf) {
1175                 sdata_info(sdata,
1176                            "no channel context assigned to vif?, disconnecting\n");
1177                 goto drop_connection;
1178         }
1179
1180         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1181
1182         if (local->use_chanctx &&
1183             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1184                 sdata_info(sdata,
1185                            "driver doesn't support chan-switch with channel contexts\n");
1186                 goto drop_connection;
1187         }
1188
1189         ch_switch.timestamp = timestamp;
1190         ch_switch.device_timestamp = device_timestamp;
1191         ch_switch.block_tx = csa_ie.mode;
1192         ch_switch.chandef = csa_ie.chandef;
1193         ch_switch.count = csa_ie.count;
1194
1195         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1196                 sdata_info(sdata,
1197                            "preparing for channel switch failed, disconnecting\n");
1198                 goto drop_connection;
1199         }
1200
1201         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1202                                             chanctx->mode, false);
1203         if (res) {
1204                 sdata_info(sdata,
1205                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1206                            res);
1207                 goto drop_connection;
1208         }
1209         mutex_unlock(&local->chanctx_mtx);
1210
1211         sdata->vif.csa_active = true;
1212         sdata->csa_chandef = csa_ie.chandef;
1213         sdata->csa_block_tx = csa_ie.mode;
1214         ifmgd->csa_ignored_same_chan = false;
1215
1216         if (sdata->csa_block_tx)
1217                 ieee80211_stop_vif_queues(local, sdata,
1218                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1219         mutex_unlock(&local->mtx);
1220
1221         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1222                                           csa_ie.count);
1223
1224         if (local->ops->channel_switch) {
1225                 /* use driver's channel switch callback */
1226                 drv_channel_switch(local, sdata, &ch_switch);
1227                 return;
1228         }
1229
1230         /* channel switch handled in software */
1231         if (csa_ie.count <= 1)
1232                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1233         else
1234                 mod_timer(&ifmgd->chswitch_timer,
1235                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1236                                          cbss->beacon_interval));
1237         return;
1238  drop_connection:
1239         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1240         mutex_unlock(&local->chanctx_mtx);
1241         mutex_unlock(&local->mtx);
1242 }
1243
1244 static bool
1245 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1246                                  struct ieee80211_channel *channel,
1247                                  const u8 *country_ie, u8 country_ie_len,
1248                                  const u8 *pwr_constr_elem,
1249                                  int *chan_pwr, int *pwr_reduction)
1250 {
1251         struct ieee80211_country_ie_triplet *triplet;
1252         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1253         int i, chan_increment;
1254         bool have_chan_pwr = false;
1255
1256         /* Invalid IE */
1257         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1258                 return false;
1259
1260         triplet = (void *)(country_ie + 3);
1261         country_ie_len -= 3;
1262
1263         switch (channel->band) {
1264         default:
1265                 WARN_ON_ONCE(1);
1266                 /* fall through */
1267         case NL80211_BAND_2GHZ:
1268         case NL80211_BAND_60GHZ:
1269                 chan_increment = 1;
1270                 break;
1271         case NL80211_BAND_5GHZ:
1272                 chan_increment = 4;
1273                 break;
1274         }
1275
1276         /* find channel */
1277         while (country_ie_len >= 3) {
1278                 u8 first_channel = triplet->chans.first_channel;
1279
1280                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1281                         goto next;
1282
1283                 for (i = 0; i < triplet->chans.num_channels; i++) {
1284                         if (first_channel + i * chan_increment == chan) {
1285                                 have_chan_pwr = true;
1286                                 *chan_pwr = triplet->chans.max_power;
1287                                 break;
1288                         }
1289                 }
1290                 if (have_chan_pwr)
1291                         break;
1292
1293  next:
1294                 triplet++;
1295                 country_ie_len -= 3;
1296         }
1297
1298         if (have_chan_pwr && pwr_constr_elem)
1299                 *pwr_reduction = *pwr_constr_elem;
1300         else
1301                 *pwr_reduction = 0;
1302
1303         return have_chan_pwr;
1304 }
1305
1306 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1307                                       struct ieee80211_channel *channel,
1308                                       const u8 *cisco_dtpc_ie,
1309                                       int *pwr_level)
1310 {
1311         /* From practical testing, the first data byte of the DTPC element
1312          * seems to contain the requested dBm level, and the CLI on Cisco
1313          * APs clearly state the range is -127 to 127 dBm, which indicates
1314          * a signed byte, although it seemingly never actually goes negative.
1315          * The other byte seems to always be zero.
1316          */
1317         *pwr_level = (__s8)cisco_dtpc_ie[4];
1318 }
1319
1320 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1321                                        struct ieee80211_channel *channel,
1322                                        struct ieee80211_mgmt *mgmt,
1323                                        const u8 *country_ie, u8 country_ie_len,
1324                                        const u8 *pwr_constr_ie,
1325                                        const u8 *cisco_dtpc_ie)
1326 {
1327         bool has_80211h_pwr = false, has_cisco_pwr = false;
1328         int chan_pwr = 0, pwr_reduction_80211h = 0;
1329         int pwr_level_cisco, pwr_level_80211h;
1330         int new_ap_level;
1331         __le16 capab = mgmt->u.probe_resp.capab_info;
1332
1333         if (country_ie &&
1334             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1335              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1336                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1337                         sdata, channel, country_ie, country_ie_len,
1338                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1339                 pwr_level_80211h =
1340                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1341         }
1342
1343         if (cisco_dtpc_ie) {
1344                 ieee80211_find_cisco_dtpc(
1345                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1346                 has_cisco_pwr = true;
1347         }
1348
1349         if (!has_80211h_pwr && !has_cisco_pwr)
1350                 return 0;
1351
1352         /* If we have both 802.11h and Cisco DTPC, apply both limits
1353          * by picking the smallest of the two power levels advertised.
1354          */
1355         if (has_80211h_pwr &&
1356             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1357                 new_ap_level = pwr_level_80211h;
1358
1359                 if (sdata->ap_power_level == new_ap_level)
1360                         return 0;
1361
1362                 sdata_dbg(sdata,
1363                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1364                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1365                           sdata->u.mgd.bssid);
1366         } else {  /* has_cisco_pwr is always true here. */
1367                 new_ap_level = pwr_level_cisco;
1368
1369                 if (sdata->ap_power_level == new_ap_level)
1370                         return 0;
1371
1372                 sdata_dbg(sdata,
1373                           "Limiting TX power to %d dBm as advertised by %pM\n",
1374                           pwr_level_cisco, sdata->u.mgd.bssid);
1375         }
1376
1377         sdata->ap_power_level = new_ap_level;
1378         if (__ieee80211_recalc_txpower(sdata))
1379                 return BSS_CHANGED_TXPOWER;
1380         return 0;
1381 }
1382
1383 /* powersave */
1384 static void ieee80211_enable_ps(struct ieee80211_local *local,
1385                                 struct ieee80211_sub_if_data *sdata)
1386 {
1387         struct ieee80211_conf *conf = &local->hw.conf;
1388
1389         /*
1390          * If we are scanning right now then the parameters will
1391          * take effect when scan finishes.
1392          */
1393         if (local->scanning)
1394                 return;
1395
1396         if (conf->dynamic_ps_timeout > 0 &&
1397             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1398                 mod_timer(&local->dynamic_ps_timer, jiffies +
1399                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1400         } else {
1401                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1402                         ieee80211_send_nullfunc(local, sdata, true);
1403
1404                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1405                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1406                         return;
1407
1408                 conf->flags |= IEEE80211_CONF_PS;
1409                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1410         }
1411 }
1412
1413 static void ieee80211_change_ps(struct ieee80211_local *local)
1414 {
1415         struct ieee80211_conf *conf = &local->hw.conf;
1416
1417         if (local->ps_sdata) {
1418                 ieee80211_enable_ps(local, local->ps_sdata);
1419         } else if (conf->flags & IEEE80211_CONF_PS) {
1420                 conf->flags &= ~IEEE80211_CONF_PS;
1421                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1422                 del_timer_sync(&local->dynamic_ps_timer);
1423                 cancel_work_sync(&local->dynamic_ps_enable_work);
1424         }
1425 }
1426
1427 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1428 {
1429         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1430         struct sta_info *sta = NULL;
1431         bool authorized = false;
1432
1433         if (!mgd->powersave)
1434                 return false;
1435
1436         if (mgd->broken_ap)
1437                 return false;
1438
1439         if (!mgd->associated)
1440                 return false;
1441
1442         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1443                 return false;
1444
1445         if (!mgd->have_beacon)
1446                 return false;
1447
1448         rcu_read_lock();
1449         sta = sta_info_get(sdata, mgd->bssid);
1450         if (sta)
1451                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1452         rcu_read_unlock();
1453
1454         return authorized;
1455 }
1456
1457 /* need to hold RTNL or interface lock */
1458 void ieee80211_recalc_ps(struct ieee80211_local *local)
1459 {
1460         struct ieee80211_sub_if_data *sdata, *found = NULL;
1461         int count = 0;
1462         int timeout;
1463
1464         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1465                 local->ps_sdata = NULL;
1466                 return;
1467         }
1468
1469         list_for_each_entry(sdata, &local->interfaces, list) {
1470                 if (!ieee80211_sdata_running(sdata))
1471                         continue;
1472                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1473                         /* If an AP vif is found, then disable PS
1474                          * by setting the count to zero thereby setting
1475                          * ps_sdata to NULL.
1476                          */
1477                         count = 0;
1478                         break;
1479                 }
1480                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1481                         continue;
1482                 found = sdata;
1483                 count++;
1484         }
1485
1486         if (count == 1 && ieee80211_powersave_allowed(found)) {
1487                 u8 dtimper = found->u.mgd.dtim_period;
1488
1489                 timeout = local->dynamic_ps_forced_timeout;
1490                 if (timeout < 0)
1491                         timeout = 100;
1492                 local->hw.conf.dynamic_ps_timeout = timeout;
1493
1494                 /* If the TIM IE is invalid, pretend the value is 1 */
1495                 if (!dtimper)
1496                         dtimper = 1;
1497
1498                 local->hw.conf.ps_dtim_period = dtimper;
1499                 local->ps_sdata = found;
1500         } else {
1501                 local->ps_sdata = NULL;
1502         }
1503
1504         ieee80211_change_ps(local);
1505 }
1506
1507 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1508 {
1509         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1510
1511         if (sdata->vif.bss_conf.ps != ps_allowed) {
1512                 sdata->vif.bss_conf.ps = ps_allowed;
1513                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1514         }
1515 }
1516
1517 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1518 {
1519         struct ieee80211_local *local =
1520                 container_of(work, struct ieee80211_local,
1521                              dynamic_ps_disable_work);
1522
1523         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1524                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1525                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1526         }
1527
1528         ieee80211_wake_queues_by_reason(&local->hw,
1529                                         IEEE80211_MAX_QUEUE_MAP,
1530                                         IEEE80211_QUEUE_STOP_REASON_PS,
1531                                         false);
1532 }
1533
1534 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1535 {
1536         struct ieee80211_local *local =
1537                 container_of(work, struct ieee80211_local,
1538                              dynamic_ps_enable_work);
1539         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1540         struct ieee80211_if_managed *ifmgd;
1541         unsigned long flags;
1542         int q;
1543
1544         /* can only happen when PS was just disabled anyway */
1545         if (!sdata)
1546                 return;
1547
1548         ifmgd = &sdata->u.mgd;
1549
1550         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1551                 return;
1552
1553         if (local->hw.conf.dynamic_ps_timeout > 0) {
1554                 /* don't enter PS if TX frames are pending */
1555                 if (drv_tx_frames_pending(local)) {
1556                         mod_timer(&local->dynamic_ps_timer, jiffies +
1557                                   msecs_to_jiffies(
1558                                   local->hw.conf.dynamic_ps_timeout));
1559                         return;
1560                 }
1561
1562                 /*
1563                  * transmission can be stopped by others which leads to
1564                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1565                  * is not the actual idle state.
1566                  */
1567                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1568                 for (q = 0; q < local->hw.queues; q++) {
1569                         if (local->queue_stop_reasons[q]) {
1570                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1571                                                        flags);
1572                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1573                                           msecs_to_jiffies(
1574                                           local->hw.conf.dynamic_ps_timeout));
1575                                 return;
1576                         }
1577                 }
1578                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1579         }
1580
1581         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1582             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1583                 if (drv_tx_frames_pending(local)) {
1584                         mod_timer(&local->dynamic_ps_timer, jiffies +
1585                                   msecs_to_jiffies(
1586                                   local->hw.conf.dynamic_ps_timeout));
1587                 } else {
1588                         ieee80211_send_nullfunc(local, sdata, true);
1589                         /* Flush to get the tx status of nullfunc frame */
1590                         ieee80211_flush_queues(local, sdata, false);
1591                 }
1592         }
1593
1594         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1595               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1596             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1597                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1598                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1599                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1600         }
1601 }
1602
1603 void ieee80211_dynamic_ps_timer(unsigned long data)
1604 {
1605         struct ieee80211_local *local = (void *) data;
1606
1607         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1608 }
1609
1610 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1611 {
1612         struct delayed_work *delayed_work = to_delayed_work(work);
1613         struct ieee80211_sub_if_data *sdata =
1614                 container_of(delayed_work, struct ieee80211_sub_if_data,
1615                              dfs_cac_timer_work);
1616         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1617
1618         mutex_lock(&sdata->local->mtx);
1619         if (sdata->wdev.cac_started) {
1620                 ieee80211_vif_release_channel(sdata);
1621                 cfg80211_cac_event(sdata->dev, &chandef,
1622                                    NL80211_RADAR_CAC_FINISHED,
1623                                    GFP_KERNEL);
1624         }
1625         mutex_unlock(&sdata->local->mtx);
1626 }
1627
1628 static bool
1629 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1630 {
1631         struct ieee80211_local *local = sdata->local;
1632         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1633         bool ret = false;
1634         int ac;
1635
1636         if (local->hw.queues < IEEE80211_NUM_ACS)
1637                 return false;
1638
1639         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1640                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1641                 int non_acm_ac;
1642                 unsigned long now = jiffies;
1643
1644                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1645                     tx_tspec->admitted_time &&
1646                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1647                         tx_tspec->consumed_tx_time = 0;
1648                         tx_tspec->time_slice_start = now;
1649
1650                         if (tx_tspec->downgraded)
1651                                 tx_tspec->action =
1652                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1653                 }
1654
1655                 switch (tx_tspec->action) {
1656                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1657                         /* take the original parameters */
1658                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1659                                 sdata_err(sdata,
1660                                           "failed to set TX queue parameters for queue %d\n",
1661                                           ac);
1662                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1663                         tx_tspec->downgraded = false;
1664                         ret = true;
1665                         break;
1666                 case TX_TSPEC_ACTION_DOWNGRADE:
1667                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1668                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1669                                 ret = true;
1670                                 break;
1671                         }
1672                         /* downgrade next lower non-ACM AC */
1673                         for (non_acm_ac = ac + 1;
1674                              non_acm_ac < IEEE80211_NUM_ACS;
1675                              non_acm_ac++)
1676                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1677                                         break;
1678                         /* Usually the loop will result in using BK even if it
1679                          * requires admission control, but such a configuration
1680                          * makes no sense and we have to transmit somehow - the
1681                          * AC selection does the same thing.
1682                          * If we started out trying to downgrade from BK, then
1683                          * the extra condition here might be needed.
1684                          */
1685                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1686                                 non_acm_ac = IEEE80211_AC_BK;
1687                         if (drv_conf_tx(local, sdata, ac,
1688                                         &sdata->tx_conf[non_acm_ac]))
1689                                 sdata_err(sdata,
1690                                           "failed to set TX queue parameters for queue %d\n",
1691                                           ac);
1692                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1693                         ret = true;
1694                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1695                                 tx_tspec->time_slice_start + HZ - now + 1);
1696                         break;
1697                 case TX_TSPEC_ACTION_NONE:
1698                         /* nothing now */
1699                         break;
1700                 }
1701         }
1702
1703         return ret;
1704 }
1705
1706 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1707 {
1708         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1709                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1710 }
1711
1712 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1713 {
1714         struct ieee80211_sub_if_data *sdata;
1715
1716         sdata = container_of(work, struct ieee80211_sub_if_data,
1717                              u.mgd.tx_tspec_wk.work);
1718         ieee80211_sta_handle_tspec_ac_params(sdata);
1719 }
1720
1721 /* MLME */
1722 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1723                                      struct ieee80211_sub_if_data *sdata,
1724                                      const u8 *wmm_param, size_t wmm_param_len)
1725 {
1726         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1727         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1728         size_t left;
1729         int count, ac;
1730         const u8 *pos;
1731         u8 uapsd_queues = 0;
1732
1733         if (!local->ops->conf_tx)
1734                 return false;
1735
1736         if (local->hw.queues < IEEE80211_NUM_ACS)
1737                 return false;
1738
1739         if (!wmm_param)
1740                 return false;
1741
1742         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1743                 return false;
1744
1745         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1746                 uapsd_queues = ifmgd->uapsd_queues;
1747
1748         count = wmm_param[6] & 0x0f;
1749         if (count == ifmgd->wmm_last_param_set)
1750                 return false;
1751         ifmgd->wmm_last_param_set = count;
1752
1753         pos = wmm_param + 8;
1754         left = wmm_param_len - 8;
1755
1756         memset(&params, 0, sizeof(params));
1757
1758         sdata->wmm_acm = 0;
1759         for (; left >= 4; left -= 4, pos += 4) {
1760                 int aci = (pos[0] >> 5) & 0x03;
1761                 int acm = (pos[0] >> 4) & 0x01;
1762                 bool uapsd = false;
1763
1764                 switch (aci) {
1765                 case 1: /* AC_BK */
1766                         ac = IEEE80211_AC_BK;
1767                         if (acm)
1768                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1769                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1770                                 uapsd = true;
1771                         break;
1772                 case 2: /* AC_VI */
1773                         ac = IEEE80211_AC_VI;
1774                         if (acm)
1775                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1776                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1777                                 uapsd = true;
1778                         break;
1779                 case 3: /* AC_VO */
1780                         ac = IEEE80211_AC_VO;
1781                         if (acm)
1782                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1783                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1784                                 uapsd = true;
1785                         break;
1786                 case 0: /* AC_BE */
1787                 default:
1788                         ac = IEEE80211_AC_BE;
1789                         if (acm)
1790                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1791                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1792                                 uapsd = true;
1793                         break;
1794                 }
1795
1796                 params[ac].aifs = pos[0] & 0x0f;
1797
1798                 if (params[ac].aifs < 2) {
1799                         sdata_info(sdata,
1800                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1801                                    params[ac].aifs, aci);
1802                         params[ac].aifs = 2;
1803                 }
1804                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1805                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1806                 params[ac].txop = get_unaligned_le16(pos + 2);
1807                 params[ac].acm = acm;
1808                 params[ac].uapsd = uapsd;
1809
1810                 if (params[ac].cw_min > params[ac].cw_max) {
1811                         sdata_info(sdata,
1812                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1813                                    params[ac].cw_min, params[ac].cw_max, aci);
1814                         return false;
1815                 }
1816         }
1817
1818         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1819                 mlme_dbg(sdata,
1820                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1821                          ac, params[ac].acm,
1822                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1823                          params[ac].txop, params[ac].uapsd,
1824                          ifmgd->tx_tspec[ac].downgraded);
1825                 sdata->tx_conf[ac] = params[ac];
1826                 if (!ifmgd->tx_tspec[ac].downgraded &&
1827                     drv_conf_tx(local, sdata, ac, &params[ac]))
1828                         sdata_err(sdata,
1829                                   "failed to set TX queue parameters for AC %d\n",
1830                                   ac);
1831         }
1832
1833         /* enable WMM or activate new settings */
1834         sdata->vif.bss_conf.qos = true;
1835         return true;
1836 }
1837
1838 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1839 {
1840         lockdep_assert_held(&sdata->local->mtx);
1841
1842         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1843         ieee80211_run_deferred_scan(sdata->local);
1844 }
1845
1846 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1847 {
1848         mutex_lock(&sdata->local->mtx);
1849         __ieee80211_stop_poll(sdata);
1850         mutex_unlock(&sdata->local->mtx);
1851 }
1852
1853 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1854                                            u16 capab, bool erp_valid, u8 erp)
1855 {
1856         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1857         struct ieee80211_supported_band *sband;
1858         u32 changed = 0;
1859         bool use_protection;
1860         bool use_short_preamble;
1861         bool use_short_slot;
1862
1863         sband = ieee80211_get_sband(sdata);
1864         if (!sband)
1865                 return changed;
1866
1867         if (erp_valid) {
1868                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1869                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1870         } else {
1871                 use_protection = false;
1872                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1873         }
1874
1875         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1876         if (sband->band == NL80211_BAND_5GHZ)
1877                 use_short_slot = true;
1878
1879         if (use_protection != bss_conf->use_cts_prot) {
1880                 bss_conf->use_cts_prot = use_protection;
1881                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1882         }
1883
1884         if (use_short_preamble != bss_conf->use_short_preamble) {
1885                 bss_conf->use_short_preamble = use_short_preamble;
1886                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1887         }
1888
1889         if (use_short_slot != bss_conf->use_short_slot) {
1890                 bss_conf->use_short_slot = use_short_slot;
1891                 changed |= BSS_CHANGED_ERP_SLOT;
1892         }
1893
1894         return changed;
1895 }
1896
1897 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1898                                      struct cfg80211_bss *cbss,
1899                                      u32 bss_info_changed)
1900 {
1901         struct ieee80211_bss *bss = (void *)cbss->priv;
1902         struct ieee80211_local *local = sdata->local;
1903         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1904
1905         bss_info_changed |= BSS_CHANGED_ASSOC;
1906         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1907                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1908
1909         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1910                 beacon_loss_count * bss_conf->beacon_int));
1911
1912         sdata->u.mgd.associated = cbss;
1913         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1914
1915         ieee80211_check_rate_mask(sdata);
1916
1917         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1918
1919         if (sdata->vif.p2p ||
1920             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1921                 const struct cfg80211_bss_ies *ies;
1922
1923                 rcu_read_lock();
1924                 ies = rcu_dereference(cbss->ies);
1925                 if (ies) {
1926                         int ret;
1927
1928                         ret = cfg80211_get_p2p_attr(
1929                                         ies->data, ies->len,
1930                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1931                                         (u8 *) &bss_conf->p2p_noa_attr,
1932                                         sizeof(bss_conf->p2p_noa_attr));
1933                         if (ret >= 2) {
1934                                 sdata->u.mgd.p2p_noa_index =
1935                                         bss_conf->p2p_noa_attr.index;
1936                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1937                         }
1938                 }
1939                 rcu_read_unlock();
1940         }
1941
1942         /* just to be sure */
1943         ieee80211_stop_poll(sdata);
1944
1945         ieee80211_led_assoc(local, 1);
1946
1947         if (sdata->u.mgd.have_beacon) {
1948                 /*
1949                  * If the AP is buggy we may get here with no DTIM period
1950                  * known, so assume it's 1 which is the only safe assumption
1951                  * in that case, although if the TIM IE is broken powersave
1952                  * probably just won't work at all.
1953                  */
1954                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1955                 bss_conf->beacon_rate = bss->beacon_rate;
1956                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1957         } else {
1958                 bss_conf->beacon_rate = NULL;
1959                 bss_conf->dtim_period = 0;
1960         }
1961
1962         bss_conf->assoc = 1;
1963
1964         /* Tell the driver to monitor connection quality (if supported) */
1965         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1966             bss_conf->cqm_rssi_thold)
1967                 bss_info_changed |= BSS_CHANGED_CQM;
1968
1969         /* Enable ARP filtering */
1970         if (bss_conf->arp_addr_cnt)
1971                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1972
1973         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1974
1975         mutex_lock(&local->iflist_mtx);
1976         ieee80211_recalc_ps(local);
1977         mutex_unlock(&local->iflist_mtx);
1978
1979         ieee80211_recalc_smps(sdata);
1980         ieee80211_recalc_ps_vif(sdata);
1981
1982         netif_carrier_on(sdata->dev);
1983 }
1984
1985 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1986                                    u16 stype, u16 reason, bool tx,
1987                                    u8 *frame_buf)
1988 {
1989         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1990         struct ieee80211_local *local = sdata->local;
1991         u32 changed = 0;
1992
1993         sdata_assert_lock(sdata);
1994
1995         if (WARN_ON_ONCE(tx && !frame_buf))
1996                 return;
1997
1998         if (WARN_ON(!ifmgd->associated))
1999                 return;
2000
2001         ieee80211_stop_poll(sdata);
2002
2003         ifmgd->associated = NULL;
2004         netif_carrier_off(sdata->dev);
2005
2006         /*
2007          * if we want to get out of ps before disassoc (why?) we have
2008          * to do it before sending disassoc, as otherwise the null-packet
2009          * won't be valid.
2010          */
2011         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2012                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2013                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2014         }
2015         local->ps_sdata = NULL;
2016
2017         /* disable per-vif ps */
2018         ieee80211_recalc_ps_vif(sdata);
2019
2020         /* make sure ongoing transmission finishes */
2021         synchronize_net();
2022
2023         /*
2024          * drop any frame before deauth/disassoc, this can be data or
2025          * management frame. Since we are disconnecting, we should not
2026          * insist sending these frames which can take time and delay
2027          * the disconnection and possible the roaming.
2028          */
2029         if (tx)
2030                 ieee80211_flush_queues(local, sdata, true);
2031
2032         /* deauthenticate/disassociate now */
2033         if (tx || frame_buf)
2034                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2035                                                reason, tx, frame_buf);
2036
2037         /* flush out frame - make sure the deauth was actually sent */
2038         if (tx)
2039                 ieee80211_flush_queues(local, sdata, false);
2040
2041         /* clear bssid only after building the needed mgmt frames */
2042         eth_zero_addr(ifmgd->bssid);
2043
2044         /* remove AP and TDLS peers */
2045         sta_info_flush(sdata);
2046
2047         /* finally reset all BSS / config parameters */
2048         changed |= ieee80211_reset_erp_info(sdata);
2049
2050         ieee80211_led_assoc(local, 0);
2051         changed |= BSS_CHANGED_ASSOC;
2052         sdata->vif.bss_conf.assoc = false;
2053
2054         ifmgd->p2p_noa_index = -1;
2055         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2056                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2057
2058         /* on the next assoc, re-program HT/VHT parameters */
2059         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2060         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2061         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2062         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2063
2064         /* reset MU-MIMO ownership and group data */
2065         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2066                sizeof(sdata->vif.bss_conf.mu_group.membership));
2067         memset(sdata->vif.bss_conf.mu_group.position, 0,
2068                sizeof(sdata->vif.bss_conf.mu_group.position));
2069         changed |= BSS_CHANGED_MU_GROUPS;
2070         sdata->vif.mu_mimo_owner = false;
2071
2072         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2073
2074         del_timer_sync(&local->dynamic_ps_timer);
2075         cancel_work_sync(&local->dynamic_ps_enable_work);
2076
2077         /* Disable ARP filtering */
2078         if (sdata->vif.bss_conf.arp_addr_cnt)
2079                 changed |= BSS_CHANGED_ARP_FILTER;
2080
2081         sdata->vif.bss_conf.qos = false;
2082         changed |= BSS_CHANGED_QOS;
2083
2084         /* The BSSID (not really interesting) and HT changed */
2085         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2086         ieee80211_bss_info_change_notify(sdata, changed);
2087
2088         /* disassociated - set to defaults now */
2089         ieee80211_set_wmm_default(sdata, false, false);
2090
2091         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2092         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2093         del_timer_sync(&sdata->u.mgd.timer);
2094         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2095
2096         sdata->vif.bss_conf.dtim_period = 0;
2097         sdata->vif.bss_conf.beacon_rate = NULL;
2098
2099         ifmgd->have_beacon = false;
2100
2101         ifmgd->flags = 0;
2102         mutex_lock(&local->mtx);
2103         ieee80211_vif_release_channel(sdata);
2104
2105         sdata->vif.csa_active = false;
2106         ifmgd->csa_waiting_bcn = false;
2107         ifmgd->csa_ignored_same_chan = false;
2108         if (sdata->csa_block_tx) {
2109                 ieee80211_wake_vif_queues(local, sdata,
2110                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2111                 sdata->csa_block_tx = false;
2112         }
2113         mutex_unlock(&local->mtx);
2114
2115         /* existing TX TSPEC sessions no longer exist */
2116         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2117         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2118
2119         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2120 }
2121
2122 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2123                              struct ieee80211_hdr *hdr)
2124 {
2125         /*
2126          * We can postpone the mgd.timer whenever receiving unicast frames
2127          * from AP because we know that the connection is working both ways
2128          * at that time. But multicast frames (and hence also beacons) must
2129          * be ignored here, because we need to trigger the timer during
2130          * data idle periods for sending the periodic probe request to the
2131          * AP we're connected to.
2132          */
2133         if (is_multicast_ether_addr(hdr->addr1))
2134                 return;
2135
2136         ieee80211_sta_reset_conn_monitor(sdata);
2137 }
2138
2139 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2140 {
2141         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2142         struct ieee80211_local *local = sdata->local;
2143
2144         mutex_lock(&local->mtx);
2145         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2146                 goto out;
2147
2148         __ieee80211_stop_poll(sdata);
2149
2150         mutex_lock(&local->iflist_mtx);
2151         ieee80211_recalc_ps(local);
2152         mutex_unlock(&local->iflist_mtx);
2153
2154         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2155                 goto out;
2156
2157         /*
2158          * We've received a probe response, but are not sure whether
2159          * we have or will be receiving any beacons or data, so let's
2160          * schedule the timers again, just in case.
2161          */
2162         ieee80211_sta_reset_beacon_monitor(sdata);
2163
2164         mod_timer(&ifmgd->conn_mon_timer,
2165                   round_jiffies_up(jiffies +
2166                                    IEEE80211_CONNECTION_IDLE_TIME));
2167 out:
2168         mutex_unlock(&local->mtx);
2169 }
2170
2171 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2172                                            struct ieee80211_hdr *hdr,
2173                                            u16 tx_time)
2174 {
2175         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2176         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2177         int ac = ieee80211_ac_from_tid(tid);
2178         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2179         unsigned long now = jiffies;
2180
2181         if (likely(!tx_tspec->admitted_time))
2182                 return;
2183
2184         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2185                 tx_tspec->consumed_tx_time = 0;
2186                 tx_tspec->time_slice_start = now;
2187
2188                 if (tx_tspec->downgraded) {
2189                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2190                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2191                 }
2192         }
2193
2194         if (tx_tspec->downgraded)
2195                 return;
2196
2197         tx_tspec->consumed_tx_time += tx_time;
2198
2199         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2200                 tx_tspec->downgraded = true;
2201                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2202                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2203         }
2204 }
2205
2206 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2207                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2208 {
2209         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2210
2211         if (!ieee80211_is_data(hdr->frame_control))
2212             return;
2213
2214         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2215             sdata->u.mgd.probe_send_count > 0) {
2216                 if (ack)
2217                         ieee80211_sta_reset_conn_monitor(sdata);
2218                 else
2219                         sdata->u.mgd.nullfunc_failed = true;
2220                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2221                 return;
2222         }
2223
2224         if (ack)
2225                 ieee80211_sta_reset_conn_monitor(sdata);
2226 }
2227
2228 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2229 {
2230         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2231         const u8 *ssid;
2232         u8 *dst = ifmgd->associated->bssid;
2233         u8 unicast_limit = max(1, max_probe_tries - 3);
2234         struct sta_info *sta;
2235
2236         /*
2237          * Try sending broadcast probe requests for the last three
2238          * probe requests after the first ones failed since some
2239          * buggy APs only support broadcast probe requests.
2240          */
2241         if (ifmgd->probe_send_count >= unicast_limit)
2242                 dst = NULL;
2243
2244         /*
2245          * When the hardware reports an accurate Tx ACK status, it's
2246          * better to send a nullfunc frame instead of a probe request,
2247          * as it will kick us off the AP quickly if we aren't associated
2248          * anymore. The timeout will be reset if the frame is ACKed by
2249          * the AP.
2250          */
2251         ifmgd->probe_send_count++;
2252
2253         if (dst) {
2254                 mutex_lock(&sdata->local->sta_mtx);
2255                 sta = sta_info_get(sdata, dst);
2256                 if (!WARN_ON(!sta))
2257                         ieee80211_check_fast_rx(sta);
2258                 mutex_unlock(&sdata->local->sta_mtx);
2259         }
2260
2261         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2262                 ifmgd->nullfunc_failed = false;
2263                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2264         } else {
2265                 int ssid_len;
2266
2267                 rcu_read_lock();
2268                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2269                 if (WARN_ON_ONCE(ssid == NULL))
2270                         ssid_len = 0;
2271                 else
2272                         ssid_len = ssid[1];
2273
2274                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2275                                          ssid + 2, ssid_len, NULL,
2276                                          0, (u32) -1, true, 0,
2277                                          ifmgd->associated->channel, false);
2278                 rcu_read_unlock();
2279         }
2280
2281         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2282         run_again(sdata, ifmgd->probe_timeout);
2283 }
2284
2285 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2286                                    bool beacon)
2287 {
2288         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289         bool already = false;
2290
2291         if (!ieee80211_sdata_running(sdata))
2292                 return;
2293
2294         sdata_lock(sdata);
2295
2296         if (!ifmgd->associated)
2297                 goto out;
2298
2299         mutex_lock(&sdata->local->mtx);
2300
2301         if (sdata->local->tmp_channel || sdata->local->scanning) {
2302                 mutex_unlock(&sdata->local->mtx);
2303                 goto out;
2304         }
2305
2306         if (beacon) {
2307                 mlme_dbg_ratelimited(sdata,
2308                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2309                                      beacon_loss_count);
2310
2311                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2312         }
2313
2314         /*
2315          * The driver/our work has already reported this event or the
2316          * connection monitoring has kicked in and we have already sent
2317          * a probe request. Or maybe the AP died and the driver keeps
2318          * reporting until we disassociate...
2319          *
2320          * In either case we have to ignore the current call to this
2321          * function (except for setting the correct probe reason bit)
2322          * because otherwise we would reset the timer every time and
2323          * never check whether we received a probe response!
2324          */
2325         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2326                 already = true;
2327
2328         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2329
2330         mutex_unlock(&sdata->local->mtx);
2331
2332         if (already)
2333                 goto out;
2334
2335         mutex_lock(&sdata->local->iflist_mtx);
2336         ieee80211_recalc_ps(sdata->local);
2337         mutex_unlock(&sdata->local->iflist_mtx);
2338
2339         ifmgd->probe_send_count = 0;
2340         ieee80211_mgd_probe_ap_send(sdata);
2341  out:
2342         sdata_unlock(sdata);
2343 }
2344
2345 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2346                                           struct ieee80211_vif *vif)
2347 {
2348         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2349         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2350         struct cfg80211_bss *cbss;
2351         struct sk_buff *skb;
2352         const u8 *ssid;
2353         int ssid_len;
2354
2355         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2356                 return NULL;
2357
2358         sdata_assert_lock(sdata);
2359
2360         if (ifmgd->associated)
2361                 cbss = ifmgd->associated;
2362         else if (ifmgd->auth_data)
2363                 cbss = ifmgd->auth_data->bss;
2364         else if (ifmgd->assoc_data)
2365                 cbss = ifmgd->assoc_data->bss;
2366         else
2367                 return NULL;
2368
2369         rcu_read_lock();
2370         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2371         if (WARN_ON_ONCE(ssid == NULL))
2372                 ssid_len = 0;
2373         else
2374                 ssid_len = ssid[1];
2375
2376         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2377                                         (u32) -1, cbss->channel,
2378                                         ssid + 2, ssid_len,
2379                                         NULL, 0, true);
2380         rcu_read_unlock();
2381
2382         return skb;
2383 }
2384 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2385
2386 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2387                                         const u8 *buf, size_t len, bool tx,
2388                                         u16 reason)
2389 {
2390         struct ieee80211_event event = {
2391                 .type = MLME_EVENT,
2392                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2393                 .u.mlme.reason = reason,
2394         };
2395
2396         if (tx)
2397                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2398         else
2399                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2400
2401         drv_event_callback(sdata->local, sdata, &event);
2402 }
2403
2404 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2405 {
2406         struct ieee80211_local *local = sdata->local;
2407         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2408         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2409
2410         sdata_lock(sdata);
2411         if (!ifmgd->associated) {
2412                 sdata_unlock(sdata);
2413                 return;
2414         }
2415
2416         /* AP is probably out of range (or not reachable for another reason) so
2417          * remove the bss struct for that AP.
2418          */
2419         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2420
2421         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2422                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2423                                true, frame_buf);
2424         mutex_lock(&local->mtx);
2425         sdata->vif.csa_active = false;
2426         ifmgd->csa_waiting_bcn = false;
2427         if (sdata->csa_block_tx) {
2428                 ieee80211_wake_vif_queues(local, sdata,
2429                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2430                 sdata->csa_block_tx = false;
2431         }
2432         mutex_unlock(&local->mtx);
2433
2434         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2435                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2436
2437         sdata_unlock(sdata);
2438 }
2439
2440 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2441 {
2442         struct ieee80211_sub_if_data *sdata =
2443                 container_of(work, struct ieee80211_sub_if_data,
2444                              u.mgd.beacon_connection_loss_work);
2445         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2446
2447         if (ifmgd->associated)
2448                 ifmgd->beacon_loss_count++;
2449
2450         if (ifmgd->connection_loss) {
2451                 sdata_info(sdata, "Connection to AP %pM lost\n",
2452                            ifmgd->bssid);
2453                 __ieee80211_disconnect(sdata);
2454         } else {
2455                 ieee80211_mgd_probe_ap(sdata, true);
2456         }
2457 }
2458
2459 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2460 {
2461         struct ieee80211_sub_if_data *sdata =
2462                 container_of(work, struct ieee80211_sub_if_data,
2463                              u.mgd.csa_connection_drop_work);
2464
2465         __ieee80211_disconnect(sdata);
2466 }
2467
2468 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2469 {
2470         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2471         struct ieee80211_hw *hw = &sdata->local->hw;
2472
2473         trace_api_beacon_loss(sdata);
2474
2475         sdata->u.mgd.connection_loss = false;
2476         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2477 }
2478 EXPORT_SYMBOL(ieee80211_beacon_loss);
2479
2480 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2481 {
2482         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2483         struct ieee80211_hw *hw = &sdata->local->hw;
2484
2485         trace_api_connection_loss(sdata);
2486
2487         sdata->u.mgd.connection_loss = true;
2488         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2489 }
2490 EXPORT_SYMBOL(ieee80211_connection_loss);
2491
2492
2493 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2494                                         bool assoc)
2495 {
2496         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2497
2498         sdata_assert_lock(sdata);
2499
2500         if (!assoc) {
2501                 /*
2502                  * we are not authenticated yet, the only timer that could be
2503                  * running is the timeout for the authentication response which
2504                  * which is not relevant anymore.
2505                  */
2506                 del_timer_sync(&sdata->u.mgd.timer);
2507                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2508
2509                 eth_zero_addr(sdata->u.mgd.bssid);
2510                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2511                 sdata->u.mgd.flags = 0;
2512                 mutex_lock(&sdata->local->mtx);
2513                 ieee80211_vif_release_channel(sdata);
2514                 mutex_unlock(&sdata->local->mtx);
2515         }
2516
2517         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2518         kfree(auth_data);
2519         sdata->u.mgd.auth_data = NULL;
2520 }
2521
2522 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2523                                          bool assoc, bool abandon)
2524 {
2525         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2526
2527         sdata_assert_lock(sdata);
2528
2529         if (!assoc) {
2530                 /*
2531                  * we are not associated yet, the only timer that could be
2532                  * running is the timeout for the association response which
2533                  * which is not relevant anymore.
2534                  */
2535                 del_timer_sync(&sdata->u.mgd.timer);
2536                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2537
2538                 eth_zero_addr(sdata->u.mgd.bssid);
2539                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2540                 sdata->u.mgd.flags = 0;
2541                 sdata->vif.mu_mimo_owner = false;
2542
2543                 mutex_lock(&sdata->local->mtx);
2544                 ieee80211_vif_release_channel(sdata);
2545                 mutex_unlock(&sdata->local->mtx);
2546
2547                 if (abandon)
2548                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2549         }
2550
2551         kfree(assoc_data);
2552         sdata->u.mgd.assoc_data = NULL;
2553 }
2554
2555 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2556                                      struct ieee80211_mgmt *mgmt, size_t len)
2557 {
2558         struct ieee80211_local *local = sdata->local;
2559         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2560         u8 *pos;
2561         struct ieee802_11_elems elems;
2562         u32 tx_flags = 0;
2563
2564         pos = mgmt->u.auth.variable;
2565         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2566         if (!elems.challenge)
2567                 return;
2568         auth_data->expected_transaction = 4;
2569         drv_mgd_prepare_tx(sdata->local, sdata);
2570         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2571                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2572                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2573         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2574                             elems.challenge - 2, elems.challenge_len + 2,
2575                             auth_data->bss->bssid, auth_data->bss->bssid,
2576                             auth_data->key, auth_data->key_len,
2577                             auth_data->key_idx, tx_flags);
2578 }
2579
2580 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2581                                    struct ieee80211_mgmt *mgmt, size_t len)
2582 {
2583         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2584         u8 bssid[ETH_ALEN];
2585         u16 auth_alg, auth_transaction, status_code;
2586         struct sta_info *sta;
2587         struct ieee80211_event event = {
2588                 .type = MLME_EVENT,
2589                 .u.mlme.data = AUTH_EVENT,
2590         };
2591
2592         sdata_assert_lock(sdata);
2593
2594         if (len < 24 + 6)
2595                 return;
2596
2597         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2598                 return;
2599
2600         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2601
2602         if (!ether_addr_equal(bssid, mgmt->bssid))
2603                 return;
2604
2605         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2606         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2607         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2608
2609         if (auth_alg != ifmgd->auth_data->algorithm ||
2610             auth_transaction != ifmgd->auth_data->expected_transaction) {
2611                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2612                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2613                            auth_transaction,
2614                            ifmgd->auth_data->expected_transaction);
2615                 return;
2616         }
2617
2618         if (status_code != WLAN_STATUS_SUCCESS) {
2619                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2620                            mgmt->sa, status_code);
2621                 ieee80211_destroy_auth_data(sdata, false);
2622                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2623                 event.u.mlme.status = MLME_DENIED;
2624                 event.u.mlme.reason = status_code;
2625                 drv_event_callback(sdata->local, sdata, &event);
2626                 return;
2627         }
2628
2629         switch (ifmgd->auth_data->algorithm) {
2630         case WLAN_AUTH_OPEN:
2631         case WLAN_AUTH_LEAP:
2632         case WLAN_AUTH_FT:
2633         case WLAN_AUTH_SAE:
2634         case WLAN_AUTH_FILS_SK:
2635         case WLAN_AUTH_FILS_SK_PFS:
2636         case WLAN_AUTH_FILS_PK:
2637                 break;
2638         case WLAN_AUTH_SHARED_KEY:
2639                 if (ifmgd->auth_data->expected_transaction != 4) {
2640                         ieee80211_auth_challenge(sdata, mgmt, len);
2641                         /* need another frame */
2642                         return;
2643                 }
2644                 break;
2645         default:
2646                 WARN_ONCE(1, "invalid auth alg %d",
2647                           ifmgd->auth_data->algorithm);
2648                 return;
2649         }
2650
2651         event.u.mlme.status = MLME_SUCCESS;
2652         drv_event_callback(sdata->local, sdata, &event);
2653         sdata_info(sdata, "authenticated\n");
2654         ifmgd->auth_data->done = true;
2655         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2656         ifmgd->auth_data->timeout_started = true;
2657         run_again(sdata, ifmgd->auth_data->timeout);
2658
2659         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2660             ifmgd->auth_data->expected_transaction != 2) {
2661                 /*
2662                  * Report auth frame to user space for processing since another
2663                  * round of Authentication frames is still needed.
2664                  */
2665                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2666                 return;
2667         }
2668
2669         /* move station state to auth */
2670         mutex_lock(&sdata->local->sta_mtx);
2671         sta = sta_info_get(sdata, bssid);
2672         if (!sta) {
2673                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2674                 goto out_err;
2675         }
2676         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2677                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2678                 goto out_err;
2679         }
2680         mutex_unlock(&sdata->local->sta_mtx);
2681
2682         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2683         return;
2684  out_err:
2685         mutex_unlock(&sdata->local->sta_mtx);
2686         /* ignore frame -- wait for timeout */
2687 }
2688
2689 #define case_WLAN(type) \
2690         case WLAN_REASON_##type: return #type
2691
2692 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2693 {
2694         switch (reason_code) {
2695         case_WLAN(UNSPECIFIED);
2696         case_WLAN(PREV_AUTH_NOT_VALID);
2697         case_WLAN(DEAUTH_LEAVING);
2698         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2699         case_WLAN(DISASSOC_AP_BUSY);
2700         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2701         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2702         case_WLAN(DISASSOC_STA_HAS_LEFT);
2703         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2704         case_WLAN(DISASSOC_BAD_POWER);
2705         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2706         case_WLAN(INVALID_IE);
2707         case_WLAN(MIC_FAILURE);
2708         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2709         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2710         case_WLAN(IE_DIFFERENT);
2711         case_WLAN(INVALID_GROUP_CIPHER);
2712         case_WLAN(INVALID_PAIRWISE_CIPHER);
2713         case_WLAN(INVALID_AKMP);
2714         case_WLAN(UNSUPP_RSN_VERSION);
2715         case_WLAN(INVALID_RSN_IE_CAP);
2716         case_WLAN(IEEE8021X_FAILED);
2717         case_WLAN(CIPHER_SUITE_REJECTED);
2718         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2719         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2720         case_WLAN(DISASSOC_LOW_ACK);
2721         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2722         case_WLAN(QSTA_LEAVE_QBSS);
2723         case_WLAN(QSTA_NOT_USE);
2724         case_WLAN(QSTA_REQUIRE_SETUP);
2725         case_WLAN(QSTA_TIMEOUT);
2726         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2727         case_WLAN(MESH_PEER_CANCELED);
2728         case_WLAN(MESH_MAX_PEERS);
2729         case_WLAN(MESH_CONFIG);
2730         case_WLAN(MESH_CLOSE);
2731         case_WLAN(MESH_MAX_RETRIES);
2732         case_WLAN(MESH_CONFIRM_TIMEOUT);
2733         case_WLAN(MESH_INVALID_GTK);
2734         case_WLAN(MESH_INCONSISTENT_PARAM);
2735         case_WLAN(MESH_INVALID_SECURITY);
2736         case_WLAN(MESH_PATH_ERROR);
2737         case_WLAN(MESH_PATH_NOFORWARD);
2738         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2739         case_WLAN(MAC_EXISTS_IN_MBSS);
2740         case_WLAN(MESH_CHAN_REGULATORY);
2741         case_WLAN(MESH_CHAN);
2742         default: return "<unknown>";
2743         }
2744 }
2745
2746 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2747                                      struct ieee80211_mgmt *mgmt, size_t len)
2748 {
2749         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2750         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2751
2752         sdata_assert_lock(sdata);
2753
2754         if (len < 24 + 2)
2755                 return;
2756
2757         if (ifmgd->associated &&
2758             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2759                 const u8 *bssid = ifmgd->associated->bssid;
2760
2761                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2762                            bssid, reason_code,
2763                            ieee80211_get_reason_code_string(reason_code));
2764
2765                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2766
2767                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2768                                             reason_code);
2769                 return;
2770         }
2771
2772         if (ifmgd->assoc_data &&
2773             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2774                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2775
2776                 sdata_info(sdata,
2777                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2778                            bssid, reason_code,
2779                            ieee80211_get_reason_code_string(reason_code));
2780
2781                 ieee80211_destroy_assoc_data(sdata, false, true);
2782
2783                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2784                 return;
2785         }
2786 }
2787
2788
2789 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2790                                        struct ieee80211_mgmt *mgmt, size_t len)
2791 {
2792         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2793         u16 reason_code;
2794
2795         sdata_assert_lock(sdata);
2796
2797         if (len < 24 + 2)
2798                 return;
2799
2800         if (!ifmgd->associated ||
2801             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2802                 return;
2803
2804         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2805
2806         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2807                    mgmt->sa, reason_code,
2808                    ieee80211_get_reason_code_string(reason_code));
2809
2810         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2811
2812         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2813 }
2814
2815 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2816                                 u8 *supp_rates, unsigned int supp_rates_len,
2817                                 u32 *rates, u32 *basic_rates,
2818                                 bool *have_higher_than_11mbit,
2819                                 int *min_rate, int *min_rate_index,
2820                                 int shift, u32 rate_flags)
2821 {
2822         int i, j;
2823
2824         for (i = 0; i < supp_rates_len; i++) {
2825                 int rate = supp_rates[i] & 0x7f;
2826                 bool is_basic = !!(supp_rates[i] & 0x80);
2827
2828                 if ((rate * 5 * (1 << shift)) > 110)
2829                         *have_higher_than_11mbit = true;
2830
2831                 /*
2832                  * Skip HT and VHT BSS membership selectors since they're not
2833                  * rates.
2834                  *
2835                  * Note: Even though the membership selector and the basic
2836                  *       rate flag share the same bit, they are not exactly
2837                  *       the same.
2838                  */
2839                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2840                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2841                         continue;
2842
2843                 for (j = 0; j < sband->n_bitrates; j++) {
2844                         struct ieee80211_rate *br;
2845                         int brate;
2846
2847                         br = &sband->bitrates[j];
2848                         if ((rate_flags & br->flags) != rate_flags)
2849                                 continue;
2850
2851                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2852                         if (brate == rate) {
2853                                 *rates |= BIT(j);
2854                                 if (is_basic)
2855                                         *basic_rates |= BIT(j);
2856                                 if ((rate * 5) < *min_rate) {
2857                                         *min_rate = rate * 5;
2858                                         *min_rate_index = j;
2859                                 }
2860                                 break;
2861                         }
2862                 }
2863         }
2864 }
2865
2866 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2867                                     struct cfg80211_bss *cbss,
2868                                     struct ieee80211_mgmt *mgmt, size_t len)
2869 {
2870         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2871         struct ieee80211_local *local = sdata->local;
2872         struct ieee80211_supported_band *sband;
2873         struct sta_info *sta;
2874         u8 *pos;
2875         u16 capab_info, aid;
2876         struct ieee802_11_elems elems;
2877         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2878         const struct cfg80211_bss_ies *bss_ies = NULL;
2879         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2880         u32 changed = 0;
2881         int err;
2882         bool ret;
2883
2884         /* AssocResp and ReassocResp have identical structure */
2885
2886         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2887         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2888
2889         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2890                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2891                            aid);
2892         aid &= ~(BIT(15) | BIT(14));
2893
2894         ifmgd->broken_ap = false;
2895
2896         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2897                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2898                            aid);
2899                 aid = 0;
2900                 ifmgd->broken_ap = true;
2901         }
2902
2903         pos = mgmt->u.assoc_resp.variable;
2904         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2905
2906         if (!elems.supp_rates) {
2907                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2908                 return false;
2909         }
2910
2911         ifmgd->aid = aid;
2912         ifmgd->tdls_chan_switch_prohibited =
2913                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2914                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2915
2916         /*
2917          * Some APs are erroneously not including some information in their
2918          * (re)association response frames. Try to recover by using the data
2919          * from the beacon or probe response. This seems to afflict mobile
2920          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2921          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2922          */
2923         if ((assoc_data->wmm && !elems.wmm_param) ||
2924             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2925              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2926             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2927              (!elems.vht_cap_elem || !elems.vht_operation))) {
2928                 const struct cfg80211_bss_ies *ies;
2929                 struct ieee802_11_elems bss_elems;
2930
2931                 rcu_read_lock();
2932                 ies = rcu_dereference(cbss->ies);
2933                 if (ies)
2934                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2935                                           GFP_ATOMIC);
2936                 rcu_read_unlock();
2937                 if (!bss_ies)
2938                         return false;
2939
2940                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2941                                        false, &bss_elems);
2942                 if (assoc_data->wmm &&
2943                     !elems.wmm_param && bss_elems.wmm_param) {
2944                         elems.wmm_param = bss_elems.wmm_param;
2945                         sdata_info(sdata,
2946                                    "AP bug: WMM param missing from AssocResp\n");
2947                 }
2948
2949                 /*
2950                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2951                  * have to include the IEs in the (re)association response.
2952                  */
2953                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2954                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2955                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2956                         sdata_info(sdata,
2957                                    "AP bug: HT capability missing from AssocResp\n");
2958                 }
2959                 if (!elems.ht_operation && bss_elems.ht_operation &&
2960                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2961                         elems.ht_operation = bss_elems.ht_operation;
2962                         sdata_info(sdata,
2963                                    "AP bug: HT operation missing from AssocResp\n");
2964                 }
2965                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2966                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2967                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2968                         sdata_info(sdata,
2969                                    "AP bug: VHT capa missing from AssocResp\n");
2970                 }
2971                 if (!elems.vht_operation && bss_elems.vht_operation &&
2972                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2973                         elems.vht_operation = bss_elems.vht_operation;
2974                         sdata_info(sdata,
2975                                    "AP bug: VHT operation missing from AssocResp\n");
2976                 }
2977         }
2978
2979         /*
2980          * We previously checked these in the beacon/probe response, so
2981          * they should be present here. This is just a safety net.
2982          */
2983         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2984             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2985                 sdata_info(sdata,
2986                            "HT AP is missing WMM params or HT capability/operation\n");
2987                 ret = false;
2988                 goto out;
2989         }
2990
2991         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2992             (!elems.vht_cap_elem || !elems.vht_operation)) {
2993                 sdata_info(sdata,
2994                            "VHT AP is missing VHT capability/operation\n");
2995                 ret = false;
2996                 goto out;
2997         }
2998
2999         mutex_lock(&sdata->local->sta_mtx);
3000         /*
3001          * station info was already allocated and inserted before
3002          * the association and should be available to us
3003          */
3004         sta = sta_info_get(sdata, cbss->bssid);
3005         if (WARN_ON(!sta)) {
3006                 mutex_unlock(&sdata->local->sta_mtx);
3007                 ret = false;
3008                 goto out;
3009         }
3010
3011         sband = ieee80211_get_sband(sdata);
3012         if (!sband) {
3013                 mutex_unlock(&sdata->local->sta_mtx);
3014                 ret = false;
3015                 goto out;
3016         }
3017
3018         /* Set up internal HT/VHT capabilities */
3019         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3020                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3021                                                   elems.ht_cap_elem, sta);
3022
3023         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3024                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3025                                                     elems.vht_cap_elem, sta);
3026
3027         /*
3028          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3029          * in their association response, so ignore that data for our own
3030          * configuration. If it changed since the last beacon, we'll get the
3031          * next beacon and update then.
3032          */
3033
3034         /*
3035          * If an operating mode notification IE is present, override the
3036          * NSS calculation (that would be done in rate_control_rate_init())
3037          * and use the # of streams from that element.
3038          */
3039         if (elems.opmode_notif &&
3040             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3041                 u8 nss;
3042
3043                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3044                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3045                 nss += 1;
3046                 sta->sta.rx_nss = nss;
3047         }
3048
3049         rate_control_rate_init(sta);
3050
3051         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3052                 set_sta_flag(sta, WLAN_STA_MFP);
3053                 sta->sta.mfp = true;
3054         } else {
3055                 sta->sta.mfp = false;
3056         }
3057
3058         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3059
3060         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3061         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3062                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3063         if (err) {
3064                 sdata_info(sdata,
3065                            "failed to move station %pM to desired state\n",
3066                            sta->sta.addr);
3067                 WARN_ON(__sta_info_destroy(sta));
3068                 mutex_unlock(&sdata->local->sta_mtx);
3069                 ret = false;
3070                 goto out;
3071         }
3072
3073         mutex_unlock(&sdata->local->sta_mtx);
3074
3075         /*
3076          * Always handle WMM once after association regardless
3077          * of the first value the AP uses. Setting -1 here has
3078          * that effect because the AP values is an unsigned
3079          * 4-bit value.
3080          */
3081         ifmgd->wmm_last_param_set = -1;
3082
3083         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3084                 ieee80211_set_wmm_default(sdata, false, false);
3085         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3086                                              elems.wmm_param_len)) {
3087                 /* still enable QoS since we might have HT/VHT */
3088                 ieee80211_set_wmm_default(sdata, false, true);
3089                 /* set the disable-WMM flag in this case to disable
3090                  * tracking WMM parameter changes in the beacon if
3091                  * the parameters weren't actually valid. Doing so
3092                  * avoids changing parameters very strangely when
3093                  * the AP is going back and forth between valid and
3094                  * invalid parameters.
3095                  */
3096                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3097         }
3098         changed |= BSS_CHANGED_QOS;
3099
3100         if (elems.max_idle_period_ie) {
3101                 bss_conf->max_idle_period =
3102                         le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3103                 bss_conf->protected_keep_alive =
3104                         !!(elems.max_idle_period_ie->idle_options &
3105                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3106                 changed |= BSS_CHANGED_KEEP_ALIVE;
3107         } else {
3108                 bss_conf->max_idle_period = 0;
3109                 bss_conf->protected_keep_alive = false;
3110         }
3111
3112         /* set AID and assoc capability,
3113          * ieee80211_set_associated() will tell the driver */
3114         bss_conf->aid = aid;
3115         bss_conf->assoc_capability = capab_info;
3116         ieee80211_set_associated(sdata, cbss, changed);
3117
3118         /*
3119          * If we're using 4-addr mode, let the AP know that we're
3120          * doing so, so that it can create the STA VLAN on its side
3121          */
3122         if (ifmgd->use_4addr)
3123                 ieee80211_send_4addr_nullfunc(local, sdata);
3124
3125         /*
3126          * Start timer to probe the connection to the AP now.
3127          * Also start the timer that will detect beacon loss.
3128          */
3129         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3130         ieee80211_sta_reset_beacon_monitor(sdata);
3131
3132         ret = true;
3133  out:
3134         kfree(bss_ies);
3135         return ret;
3136 }
3137
3138 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3139                                          struct ieee80211_mgmt *mgmt,
3140                                          size_t len)
3141 {
3142         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3143         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3144         u16 capab_info, status_code, aid;
3145         struct ieee802_11_elems elems;
3146         int ac, uapsd_queues = -1;
3147         u8 *pos;
3148         bool reassoc;
3149         struct cfg80211_bss *bss;
3150         struct ieee80211_event event = {
3151                 .type = MLME_EVENT,
3152                 .u.mlme.data = ASSOC_EVENT,
3153         };
3154
3155         sdata_assert_lock(sdata);
3156
3157         if (!assoc_data)
3158                 return;
3159         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3160                 return;
3161
3162         /*
3163          * AssocResp and ReassocResp have identical structure, so process both
3164          * of them in this function.
3165          */
3166
3167         if (len < 24 + 6)
3168                 return;
3169
3170         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3171         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3172         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3173         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3174
3175         sdata_info(sdata,
3176                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3177                    reassoc ? "Rea" : "A", mgmt->sa,
3178                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3179
3180         if (assoc_data->fils_kek_len &&
3181             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3182                 return;
3183
3184         pos = mgmt->u.assoc_resp.variable;
3185         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3186
3187         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3188             elems.timeout_int &&
3189             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3190                 u32 tu, ms;
3191                 tu = le32_to_cpu(elems.timeout_int->value);
3192                 ms = tu * 1024 / 1000;
3193                 sdata_info(sdata,
3194                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3195                            mgmt->sa, tu, ms);
3196                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3197                 assoc_data->timeout_started = true;
3198                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3199                         run_again(sdata, assoc_data->timeout);
3200                 return;
3201         }
3202
3203         bss = assoc_data->bss;
3204
3205         if (status_code != WLAN_STATUS_SUCCESS) {
3206                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3207                            mgmt->sa, status_code);
3208                 ieee80211_destroy_assoc_data(sdata, false, false);
3209                 event.u.mlme.status = MLME_DENIED;
3210                 event.u.mlme.reason = status_code;
3211                 drv_event_callback(sdata->local, sdata, &event);
3212         } else {
3213                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3214                         /* oops -- internal error -- send timeout for now */
3215                         ieee80211_destroy_assoc_data(sdata, false, false);
3216                         cfg80211_assoc_timeout(sdata->dev, bss);
3217                         return;
3218                 }
3219                 event.u.mlme.status = MLME_SUCCESS;
3220                 drv_event_callback(sdata->local, sdata, &event);
3221                 sdata_info(sdata, "associated\n");
3222
3223                 /*
3224                  * destroy assoc_data afterwards, as otherwise an idle
3225                  * recalc after assoc_data is NULL but before associated
3226                  * is set can cause the interface to go idle
3227                  */
3228                 ieee80211_destroy_assoc_data(sdata, true, false);
3229
3230                 /* get uapsd queues configuration */
3231                 uapsd_queues = 0;
3232                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3233                         if (sdata->tx_conf[ac].uapsd)
3234                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3235         }
3236
3237         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3238 }
3239
3240 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3241                                   struct ieee80211_mgmt *mgmt, size_t len,
3242                                   struct ieee80211_rx_status *rx_status,
3243                                   struct ieee802_11_elems *elems)
3244 {
3245         struct ieee80211_local *local = sdata->local;
3246         struct ieee80211_bss *bss;
3247         struct ieee80211_channel *channel;
3248
3249         sdata_assert_lock(sdata);
3250
3251         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3252         if (!channel)
3253                 return;
3254
3255         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3256                                         channel);
3257         if (bss) {
3258                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3259                 ieee80211_rx_bss_put(local, bss);
3260         }
3261 }
3262
3263
3264 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3265                                          struct sk_buff *skb)
3266 {
3267         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3268         struct ieee80211_if_managed *ifmgd;
3269         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3270         size_t baselen, len = skb->len;
3271         struct ieee802_11_elems elems;
3272
3273         ifmgd = &sdata->u.mgd;
3274
3275         sdata_assert_lock(sdata);
3276
3277         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3278                 return; /* ignore ProbeResp to foreign address */
3279
3280         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3281         if (baselen > len)
3282                 return;
3283
3284         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3285                                false, &elems);
3286
3287         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3288
3289         if (ifmgd->associated &&
3290             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3291                 ieee80211_reset_ap_probe(sdata);
3292 }
3293
3294 /*
3295  * This is the canonical list of information elements we care about,
3296  * the filter code also gives us all changes to the Microsoft OUI
3297  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3298  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3299  * changes to requested client power.
3300  *
3301  * We implement beacon filtering in software since that means we can
3302  * avoid processing the frame here and in cfg80211, and userspace
3303  * will not be able to tell whether the hardware supports it or not.
3304  *
3305  * XXX: This list needs to be dynamic -- userspace needs to be able to
3306  *      add items it requires. It also needs to be able to tell us to
3307  *      look out for other vendor IEs.
3308  */
3309 static const u64 care_about_ies =
3310         (1ULL << WLAN_EID_COUNTRY) |
3311         (1ULL << WLAN_EID_ERP_INFO) |
3312         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3313         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3314         (1ULL << WLAN_EID_HT_CAPABILITY) |
3315         (1ULL << WLAN_EID_HT_OPERATION) |
3316         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3317
3318 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3319                                      struct ieee80211_mgmt *mgmt, size_t len,
3320                                      struct ieee80211_rx_status *rx_status)
3321 {
3322         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3323         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3324         size_t baselen;
3325         struct ieee802_11_elems elems;
3326         struct ieee80211_local *local = sdata->local;
3327         struct ieee80211_chanctx_conf *chanctx_conf;
3328         struct ieee80211_channel *chan;
3329         struct sta_info *sta;
3330         u32 changed = 0;
3331         bool erp_valid;
3332         u8 erp_value = 0;
3333         u32 ncrc;
3334         u8 *bssid;
3335         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3336
3337         sdata_assert_lock(sdata);
3338
3339         /* Process beacon from the current BSS */
3340         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3341         if (baselen > len)
3342                 return;
3343
3344         rcu_read_lock();
3345         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3346         if (!chanctx_conf) {
3347                 rcu_read_unlock();
3348                 return;
3349         }
3350
3351         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3352                 rcu_read_unlock();
3353                 return;
3354         }
3355         chan = chanctx_conf->def.chan;
3356         rcu_read_unlock();
3357
3358         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3359             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3360                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3361                                        len - baselen, false, &elems);
3362
3363                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3364                 if (elems.tim && !elems.parse_error) {
3365                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3366                         ifmgd->dtim_period = tim_ie->dtim_period;
3367                 }
3368                 ifmgd->have_beacon = true;
3369                 ifmgd->assoc_data->need_beacon = false;
3370                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3371                         sdata->vif.bss_conf.sync_tsf =
3372                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3373                         sdata->vif.bss_conf.sync_device_ts =
3374                                 rx_status->device_timestamp;
3375                         if (elems.tim)
3376                                 sdata->vif.bss_conf.sync_dtim_count =
3377                                         elems.tim->dtim_count;
3378                         else
3379                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3380                 }
3381                 /* continue assoc process */
3382                 ifmgd->assoc_data->timeout = jiffies;
3383                 ifmgd->assoc_data->timeout_started = true;
3384                 run_again(sdata, ifmgd->assoc_data->timeout);
3385                 return;
3386         }
3387
3388         if (!ifmgd->associated ||
3389             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3390                 return;
3391         bssid = ifmgd->associated->bssid;
3392
3393         /* Track average RSSI from the Beacon frames of the current AP */
3394         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3395                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3396                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3397                 ifmgd->last_cqm_event_signal = 0;
3398                 ifmgd->count_beacon_signal = 1;
3399                 ifmgd->last_ave_beacon_signal = 0;
3400         } else {
3401                 ifmgd->count_beacon_signal++;
3402         }
3403
3404         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3405
3406         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3407             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3408                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3409                 int last_sig = ifmgd->last_ave_beacon_signal;
3410                 struct ieee80211_event event = {
3411                         .type = RSSI_EVENT,
3412                 };
3413
3414                 /*
3415                  * if signal crosses either of the boundaries, invoke callback
3416                  * with appropriate parameters
3417                  */
3418                 if (sig > ifmgd->rssi_max_thold &&
3419                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3420                         ifmgd->last_ave_beacon_signal = sig;
3421                         event.u.rssi.data = RSSI_EVENT_HIGH;
3422                         drv_event_callback(local, sdata, &event);
3423                 } else if (sig < ifmgd->rssi_min_thold &&
3424                            (last_sig >= ifmgd->rssi_max_thold ||
3425                            last_sig == 0)) {
3426                         ifmgd->last_ave_beacon_signal = sig;
3427                         event.u.rssi.data = RSSI_EVENT_LOW;
3428                         drv_event_callback(local, sdata, &event);
3429                 }
3430         }
3431
3432         if (bss_conf->cqm_rssi_thold &&
3433             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3434             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3435                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3436                 int last_event = ifmgd->last_cqm_event_signal;
3437                 int thold = bss_conf->cqm_rssi_thold;
3438                 int hyst = bss_conf->cqm_rssi_hyst;
3439
3440                 if (sig < thold &&
3441                     (last_event == 0 || sig < last_event - hyst)) {
3442                         ifmgd->last_cqm_event_signal = sig;
3443                         ieee80211_cqm_rssi_notify(
3444                                 &sdata->vif,
3445                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3446                                 sig, GFP_KERNEL);
3447                 } else if (sig > thold &&
3448                            (last_event == 0 || sig > last_event + hyst)) {
3449                         ifmgd->last_cqm_event_signal = sig;
3450                         ieee80211_cqm_rssi_notify(
3451                                 &sdata->vif,
3452                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3453                                 sig, GFP_KERNEL);
3454                 }
3455         }
3456
3457         if (bss_conf->cqm_rssi_low &&
3458             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3459                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3460                 int last_event = ifmgd->last_cqm_event_signal;
3461                 int low = bss_conf->cqm_rssi_low;
3462                 int high = bss_conf->cqm_rssi_high;
3463
3464                 if (sig < low &&
3465                     (last_event == 0 || last_event >= low)) {
3466                         ifmgd->last_cqm_event_signal = sig;
3467                         ieee80211_cqm_rssi_notify(
3468                                 &sdata->vif,
3469                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3470                                 sig, GFP_KERNEL);
3471                 } else if (sig > high &&
3472                            (last_event == 0 || last_event <= high)) {
3473                         ifmgd->last_cqm_event_signal = sig;
3474                         ieee80211_cqm_rssi_notify(
3475                                 &sdata->vif,
3476                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3477                                 sig, GFP_KERNEL);
3478                 }
3479         }
3480
3481         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3482                 mlme_dbg_ratelimited(sdata,
3483                                      "cancelling AP probe due to a received beacon\n");
3484                 ieee80211_reset_ap_probe(sdata);
3485         }
3486
3487         /*
3488          * Push the beacon loss detection into the future since
3489          * we are processing a beacon from the AP just now.
3490          */
3491         ieee80211_sta_reset_beacon_monitor(sdata);
3492
3493         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3494         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3495                                           len - baselen, false, &elems,
3496                                           care_about_ies, ncrc);
3497
3498         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3499             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3500                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3501                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3502                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3503                                 ieee80211_hw_config(local,
3504                                                     IEEE80211_CONF_CHANGE_PS);
3505                         }
3506                         ieee80211_send_nullfunc(local, sdata, false);
3507                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3508                         local->pspolling = true;
3509
3510                         /*
3511                          * Here is assumed that the driver will be
3512                          * able to send ps-poll frame and receive a
3513                          * response even though power save mode is
3514                          * enabled, but some drivers might require
3515                          * to disable power save here. This needs
3516                          * to be investigated.
3517                          */
3518                         ieee80211_send_pspoll(local, sdata);
3519                 }
3520         }
3521
3522         if (sdata->vif.p2p ||
3523             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3524                 struct ieee80211_p2p_noa_attr noa = {};
3525                 int ret;
3526
3527                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3528                                             len - baselen,
3529                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3530                                             (u8 *) &noa, sizeof(noa));
3531                 if (ret >= 2) {
3532                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3533                                 /* valid noa_attr and index changed */
3534                                 sdata->u.mgd.p2p_noa_index = noa.index;
3535                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3536                                 changed |= BSS_CHANGED_P2P_PS;
3537                                 /*
3538                                  * make sure we update all information, the CRC
3539                                  * mechanism doesn't look at P2P attributes.
3540                                  */
3541                                 ifmgd->beacon_crc_valid = false;
3542                         }
3543                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3544                         /* noa_attr not found and we had valid noa_attr before */
3545                         sdata->u.mgd.p2p_noa_index = -1;
3546                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3547                         changed |= BSS_CHANGED_P2P_PS;
3548                         ifmgd->beacon_crc_valid = false;
3549                 }
3550         }
3551
3552         if (ifmgd->csa_waiting_bcn)
3553                 ieee80211_chswitch_post_beacon(sdata);
3554
3555         /*
3556          * Update beacon timing and dtim count on every beacon appearance. This
3557          * will allow the driver to use the most updated values. Do it before
3558          * comparing this one with last received beacon.
3559          * IMPORTANT: These parameters would possibly be out of sync by the time
3560          * the driver will use them. The synchronized view is currently
3561          * guaranteed only in certain callbacks.
3562          */
3563         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3564                 sdata->vif.bss_conf.sync_tsf =
3565                         le64_to_cpu(mgmt->u.beacon.timestamp);
3566                 sdata->vif.bss_conf.sync_device_ts =
3567                         rx_status->device_timestamp;
3568                 if (elems.tim)
3569                         sdata->vif.bss_conf.sync_dtim_count =
3570                                 elems.tim->dtim_count;
3571                 else
3572                         sdata->vif.bss_conf.sync_dtim_count = 0;
3573         }
3574
3575         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3576                 return;
3577         ifmgd->beacon_crc = ncrc;
3578         ifmgd->beacon_crc_valid = true;
3579
3580         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3581
3582         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3583                                          rx_status->device_timestamp,
3584                                          &elems, true);
3585
3586         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3587             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3588                                      elems.wmm_param_len))
3589                 changed |= BSS_CHANGED_QOS;
3590
3591         /*
3592          * If we haven't had a beacon before, tell the driver about the
3593          * DTIM period (and beacon timing if desired) now.
3594          */
3595         if (!ifmgd->have_beacon) {
3596                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3597                 if (elems.tim)
3598                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3599                 else
3600                         bss_conf->dtim_period = 1;
3601
3602                 changed |= BSS_CHANGED_BEACON_INFO;
3603                 ifmgd->have_beacon = true;
3604
3605                 mutex_lock(&local->iflist_mtx);
3606                 ieee80211_recalc_ps(local);
3607                 mutex_unlock(&local->iflist_mtx);
3608
3609                 ieee80211_recalc_ps_vif(sdata);
3610         }
3611
3612         if (elems.erp_info) {
3613                 erp_valid = true;
3614                 erp_value = elems.erp_info[0];
3615         } else {
3616                 erp_valid = false;
3617         }
3618         changed |= ieee80211_handle_bss_capability(sdata,
3619                         le16_to_cpu(mgmt->u.beacon.capab_info),
3620                         erp_valid, erp_value);
3621
3622         mutex_lock(&local->sta_mtx);
3623         sta = sta_info_get(sdata, bssid);
3624
3625         if (ieee80211_config_bw(sdata, sta,
3626                                 elems.ht_cap_elem, elems.ht_operation,
3627                                 elems.vht_operation, bssid, &changed)) {
3628                 mutex_unlock(&local->sta_mtx);
3629                 sdata_info(sdata,
3630                            "failed to follow AP %pM bandwidth change, disconnect\n",
3631                            bssid);
3632                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3633                                        WLAN_REASON_DEAUTH_LEAVING,
3634                                        true, deauth_buf);
3635                 ieee80211_report_disconnect(sdata, deauth_buf,
3636                                             sizeof(deauth_buf), true,
3637                                             WLAN_REASON_DEAUTH_LEAVING);
3638                 return;
3639         }
3640
3641         if (sta && elems.opmode_notif)
3642                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3643                                             rx_status->band);
3644         mutex_unlock(&local->sta_mtx);
3645
3646         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3647                                                elems.country_elem,
3648                                                elems.country_elem_len,
3649                                                elems.pwr_constr_elem,
3650                                                elems.cisco_dtpc_elem);
3651
3652         ieee80211_bss_info_change_notify(sdata, changed);
3653 }
3654
3655 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3656                                   struct sk_buff *skb)
3657 {
3658         struct ieee80211_rx_status *rx_status;
3659         struct ieee80211_mgmt *mgmt;
3660         u16 fc;
3661         struct ieee802_11_elems elems;
3662         int ies_len;
3663
3664         rx_status = (struct ieee80211_rx_status *) skb->cb;
3665         mgmt = (struct ieee80211_mgmt *) skb->data;
3666         fc = le16_to_cpu(mgmt->frame_control);
3667
3668         sdata_lock(sdata);
3669
3670         switch (fc & IEEE80211_FCTL_STYPE) {
3671         case IEEE80211_STYPE_BEACON:
3672                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3673                 break;
3674         case IEEE80211_STYPE_PROBE_RESP:
3675                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3676                 break;
3677         case IEEE80211_STYPE_AUTH:
3678                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3679                 break;
3680         case IEEE80211_STYPE_DEAUTH:
3681                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3682                 break;
3683         case IEEE80211_STYPE_DISASSOC:
3684                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3685                 break;
3686         case IEEE80211_STYPE_ASSOC_RESP:
3687         case IEEE80211_STYPE_REASSOC_RESP:
3688                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3689                 break;
3690         case IEEE80211_STYPE_ACTION:
3691                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3692                         ies_len = skb->len -
3693                                   offsetof(struct ieee80211_mgmt,
3694                                            u.action.u.chan_switch.variable);
3695
3696                         if (ies_len < 0)
3697                                 break;
3698
3699                         ieee802_11_parse_elems(
3700                                 mgmt->u.action.u.chan_switch.variable,
3701                                 ies_len, true, &elems);
3702
3703                         if (elems.parse_error)
3704                                 break;
3705
3706                         ieee80211_sta_process_chanswitch(sdata,
3707                                                  rx_status->mactime,
3708                                                  rx_status->device_timestamp,
3709                                                  &elems, false);
3710                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3711                         ies_len = skb->len -
3712                                   offsetof(struct ieee80211_mgmt,
3713                                            u.action.u.ext_chan_switch.variable);
3714
3715                         if (ies_len < 0)
3716                                 break;
3717
3718                         ieee802_11_parse_elems(
3719                                 mgmt->u.action.u.ext_chan_switch.variable,
3720                                 ies_len, true, &elems);
3721
3722                         if (elems.parse_error)
3723                                 break;
3724
3725                         /* for the handling code pretend this was also an IE */
3726                         elems.ext_chansw_ie =
3727                                 &mgmt->u.action.u.ext_chan_switch.data;
3728
3729                         ieee80211_sta_process_chanswitch(sdata,
3730                                                  rx_status->mactime,
3731                                                  rx_status->device_timestamp,
3732                                                  &elems, false);
3733                 }
3734                 break;
3735         }
3736         sdata_unlock(sdata);
3737 }
3738
3739 static void ieee80211_sta_timer(unsigned long data)
3740 {
3741         struct ieee80211_sub_if_data *sdata =
3742                 (struct ieee80211_sub_if_data *) data;
3743
3744         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3745 }
3746
3747 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3748                                           u8 *bssid, u8 reason, bool tx)
3749 {
3750         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3751
3752         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3753                                tx, frame_buf);
3754
3755         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3756                                     reason);
3757 }
3758
3759 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3760 {
3761         struct ieee80211_local *local = sdata->local;
3762         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3763         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3764         u32 tx_flags = 0;
3765         u16 trans = 1;
3766         u16 status = 0;
3767
3768         sdata_assert_lock(sdata);
3769
3770         if (WARN_ON_ONCE(!auth_data))
3771                 return -EINVAL;
3772
3773         auth_data->tries++;
3774
3775         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3776                 sdata_info(sdata, "authentication with %pM timed out\n",
3777                            auth_data->bss->bssid);
3778
3779                 /*
3780                  * Most likely AP is not in the range so remove the
3781                  * bss struct for that AP.
3782                  */
3783                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3784
3785                 return -ETIMEDOUT;
3786         }
3787
3788         drv_mgd_prepare_tx(local, sdata);
3789
3790         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3791                    auth_data->bss->bssid, auth_data->tries,
3792                    IEEE80211_AUTH_MAX_TRIES);
3793
3794         auth_data->expected_transaction = 2;
3795
3796         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3797                 trans = auth_data->sae_trans;
3798                 status = auth_data->sae_status;
3799                 auth_data->expected_transaction = trans;
3800         }
3801
3802         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3803                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3804                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3805
3806         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3807                             auth_data->data, auth_data->data_len,
3808                             auth_data->bss->bssid,
3809                             auth_data->bss->bssid, NULL, 0, 0,
3810                             tx_flags);
3811
3812         if (tx_flags == 0) {
3813                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3814                 auth_data->timeout_started = true;
3815                 run_again(sdata, auth_data->timeout);
3816         } else {
3817                 auth_data->timeout =
3818                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3819                 auth_data->timeout_started = true;
3820                 run_again(sdata, auth_data->timeout);
3821         }
3822
3823         return 0;
3824 }
3825
3826 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3827 {
3828         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3829         struct ieee80211_local *local = sdata->local;
3830
3831         sdata_assert_lock(sdata);
3832
3833         assoc_data->tries++;
3834         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3835                 sdata_info(sdata, "association with %pM timed out\n",
3836                            assoc_data->bss->bssid);
3837
3838                 /*
3839                  * Most likely AP is not in the range so remove the
3840                  * bss struct for that AP.
3841                  */
3842                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3843
3844                 return -ETIMEDOUT;
3845         }
3846
3847         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3848                    assoc_data->bss->bssid, assoc_data->tries,
3849                    IEEE80211_ASSOC_MAX_TRIES);
3850         ieee80211_send_assoc(sdata);
3851
3852         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3853                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3854                 assoc_data->timeout_started = true;
3855                 run_again(sdata, assoc_data->timeout);
3856         } else {
3857                 assoc_data->timeout =
3858                         round_jiffies_up(jiffies +
3859                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3860                 assoc_data->timeout_started = true;
3861                 run_again(sdata, assoc_data->timeout);
3862         }
3863
3864         return 0;
3865 }
3866
3867 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3868                                   __le16 fc, bool acked)
3869 {
3870         struct ieee80211_local *local = sdata->local;
3871
3872         sdata->u.mgd.status_fc = fc;
3873         sdata->u.mgd.status_acked = acked;
3874         sdata->u.mgd.status_received = true;
3875
3876         ieee80211_queue_work(&local->hw, &sdata->work);
3877 }
3878
3879 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3880 {
3881         struct ieee80211_local *local = sdata->local;
3882         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3883
3884         sdata_lock(sdata);
3885
3886         if (ifmgd->status_received) {
3887                 __le16 fc = ifmgd->status_fc;
3888                 bool status_acked = ifmgd->status_acked;
3889
3890                 ifmgd->status_received = false;
3891                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3892                         if (status_acked) {
3893                                 ifmgd->auth_data->timeout =
3894                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3895                                 run_again(sdata, ifmgd->auth_data->timeout);
3896                         } else {
3897                                 ifmgd->auth_data->timeout = jiffies - 1;
3898                         }
3899                         ifmgd->auth_data->timeout_started = true;
3900                 } else if (ifmgd->assoc_data &&
3901                            (ieee80211_is_assoc_req(fc) ||
3902                             ieee80211_is_reassoc_req(fc))) {
3903                         if (status_acked) {
3904                                 ifmgd->assoc_data->timeout =
3905                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3906                                 run_again(sdata, ifmgd->assoc_data->timeout);
3907                         } else {
3908                                 ifmgd->assoc_data->timeout = jiffies - 1;
3909                         }
3910                         ifmgd->assoc_data->timeout_started = true;
3911                 }
3912         }
3913
3914         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3915             time_after(jiffies, ifmgd->auth_data->timeout)) {
3916                 if (ifmgd->auth_data->done) {
3917                         /*
3918                          * ok ... we waited for assoc but userspace didn't,
3919                          * so let's just kill the auth data
3920                          */
3921                         ieee80211_destroy_auth_data(sdata, false);
3922                 } else if (ieee80211_auth(sdata)) {
3923                         u8 bssid[ETH_ALEN];
3924                         struct ieee80211_event event = {
3925                                 .type = MLME_EVENT,
3926                                 .u.mlme.data = AUTH_EVENT,
3927                                 .u.mlme.status = MLME_TIMEOUT,
3928                         };
3929
3930                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3931
3932                         ieee80211_destroy_auth_data(sdata, false);
3933
3934                         cfg80211_auth_timeout(sdata->dev, bssid);
3935                         drv_event_callback(sdata->local, sdata, &event);
3936                 }
3937         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3938                 run_again(sdata, ifmgd->auth_data->timeout);
3939
3940         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3941             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3942                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3943                     ieee80211_do_assoc(sdata)) {
3944                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3945                         struct ieee80211_event event = {
3946                                 .type = MLME_EVENT,
3947                                 .u.mlme.data = ASSOC_EVENT,
3948                                 .u.mlme.status = MLME_TIMEOUT,
3949                         };
3950
3951                         ieee80211_destroy_assoc_data(sdata, false, false);
3952                         cfg80211_assoc_timeout(sdata->dev, bss);
3953                         drv_event_callback(sdata->local, sdata, &event);
3954                 }
3955         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3956                 run_again(sdata, ifmgd->assoc_data->timeout);
3957
3958         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3959             ifmgd->associated) {
3960                 u8 bssid[ETH_ALEN];
3961                 int max_tries;
3962
3963                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3964
3965                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3966                         max_tries = max_nullfunc_tries;
3967                 else
3968                         max_tries = max_probe_tries;
3969
3970                 /* ACK received for nullfunc probing frame */
3971                 if (!ifmgd->probe_send_count)
3972                         ieee80211_reset_ap_probe(sdata);
3973                 else if (ifmgd->nullfunc_failed) {
3974                         if (ifmgd->probe_send_count < max_tries) {
3975                                 mlme_dbg(sdata,
3976                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3977                                          bssid, ifmgd->probe_send_count,
3978                                          max_tries);
3979                                 ieee80211_mgd_probe_ap_send(sdata);
3980                         } else {
3981                                 mlme_dbg(sdata,
3982                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3983                                          bssid);
3984                                 ieee80211_sta_connection_lost(sdata, bssid,
3985                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3986                                         false);
3987                         }
3988                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3989                         run_again(sdata, ifmgd->probe_timeout);
3990                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3991                         mlme_dbg(sdata,
3992                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3993                                  bssid, probe_wait_ms);
3994                         ieee80211_sta_connection_lost(sdata, bssid,
3995                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3996                 } else if (ifmgd->probe_send_count < max_tries) {
3997                         mlme_dbg(sdata,
3998                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3999                                  bssid, probe_wait_ms,
4000                                  ifmgd->probe_send_count, max_tries);
4001                         ieee80211_mgd_probe_ap_send(sdata);
4002                 } else {
4003                         /*
4004                          * We actually lost the connection ... or did we?
4005                          * Let's make sure!
4006                          */
4007                         mlme_dbg(sdata,
4008                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4009                                  bssid, probe_wait_ms);
4010
4011                         ieee80211_sta_connection_lost(sdata, bssid,
4012                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4013                 }
4014         }
4015
4016         sdata_unlock(sdata);
4017 }
4018
4019 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4020 {
4021         struct ieee80211_sub_if_data *sdata =
4022                 (struct ieee80211_sub_if_data *) data;
4023         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4024
4025         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4026                 return;
4027
4028         sdata->u.mgd.connection_loss = false;
4029         ieee80211_queue_work(&sdata->local->hw,
4030                              &sdata->u.mgd.beacon_connection_loss_work);
4031 }
4032
4033 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4034 {
4035         struct ieee80211_sub_if_data *sdata =
4036                 (struct ieee80211_sub_if_data *) data;
4037         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4038         struct ieee80211_local *local = sdata->local;
4039
4040         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4041                 return;
4042
4043         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4044 }
4045
4046 static void ieee80211_sta_monitor_work(struct work_struct *work)
4047 {
4048         struct ieee80211_sub_if_data *sdata =
4049                 container_of(work, struct ieee80211_sub_if_data,
4050                              u.mgd.monitor_work);
4051
4052         ieee80211_mgd_probe_ap(sdata, false);
4053 }
4054
4055 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4056 {
4057         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4058                 __ieee80211_stop_poll(sdata);
4059
4060                 /* let's probe the connection once */
4061                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4062                         ieee80211_queue_work(&sdata->local->hw,
4063                                              &sdata->u.mgd.monitor_work);
4064         }
4065 }
4066
4067 #ifdef CONFIG_PM
4068 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4069 {
4070         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4071         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4072
4073         sdata_lock(sdata);
4074
4075         if (ifmgd->auth_data || ifmgd->assoc_data) {
4076                 const u8 *bssid = ifmgd->auth_data ?
4077                                 ifmgd->auth_data->bss->bssid :
4078                                 ifmgd->assoc_data->bss->bssid;
4079
4080                 /*
4081                  * If we are trying to authenticate / associate while suspending,
4082                  * cfg80211 won't know and won't actually abort those attempts,
4083                  * thus we need to do that ourselves.
4084                  */
4085                 ieee80211_send_deauth_disassoc(sdata, bssid,
4086                                                IEEE80211_STYPE_DEAUTH,
4087                                                WLAN_REASON_DEAUTH_LEAVING,
4088                                                false, frame_buf);
4089                 if (ifmgd->assoc_data)
4090                         ieee80211_destroy_assoc_data(sdata, false, true);
4091                 if (ifmgd->auth_data)
4092                         ieee80211_destroy_auth_data(sdata, false);
4093                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4094                                       IEEE80211_DEAUTH_FRAME_LEN);
4095         }
4096
4097         /* This is a bit of a hack - we should find a better and more generic
4098          * solution to this. Normally when suspending, cfg80211 will in fact
4099          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4100          * auth (not so important) or assoc (this is the problem) process.
4101          *
4102          * As a consequence, it can happen that we are in the process of both
4103          * associating and suspending, and receive an association response
4104          * after cfg80211 has checked if it needs to disconnect, but before
4105          * we actually set the flag to drop incoming frames. This will then
4106          * cause the workqueue flush to process the association response in
4107          * the suspend, resulting in a successful association just before it
4108          * tries to remove the interface from the driver, which now though
4109          * has a channel context assigned ... this results in issues.
4110          *
4111          * To work around this (for now) simply deauth here again if we're
4112          * now connected.
4113          */
4114         if (ifmgd->associated && !sdata->local->wowlan) {
4115                 u8 bssid[ETH_ALEN];
4116                 struct cfg80211_deauth_request req = {
4117                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4118                         .bssid = bssid,
4119                 };
4120
4121                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4122                 ieee80211_mgd_deauth(sdata, &req);
4123         }
4124
4125         sdata_unlock(sdata);
4126 }
4127
4128 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4129 {
4130         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4131
4132         sdata_lock(sdata);
4133         if (!ifmgd->associated) {
4134                 sdata_unlock(sdata);
4135                 return;
4136         }
4137
4138         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4139                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4140                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4141                 ieee80211_sta_connection_lost(sdata,
4142                                               ifmgd->associated->bssid,
4143                                               WLAN_REASON_UNSPECIFIED,
4144                                               true);
4145                 sdata_unlock(sdata);
4146                 return;
4147         }
4148         sdata_unlock(sdata);
4149 }
4150 #endif
4151
4152 /* interface setup */
4153 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4154 {
4155         struct ieee80211_if_managed *ifmgd;
4156
4157         ifmgd = &sdata->u.mgd;
4158         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4159         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4160         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4161                   ieee80211_beacon_connection_loss_work);
4162         INIT_WORK(&ifmgd->csa_connection_drop_work,
4163                   ieee80211_csa_connection_drop_work);
4164         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4165         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4166                           ieee80211_tdls_peer_del_work);
4167         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4168                     (unsigned long) sdata);
4169         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4170                     (unsigned long) sdata);
4171         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4172                     (unsigned long) sdata);
4173         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4174                     (unsigned long) sdata);
4175         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4176                           ieee80211_sta_handle_tspec_ac_params_wk);
4177
4178         ifmgd->flags = 0;
4179         ifmgd->powersave = sdata->wdev.ps;
4180         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4181         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4182         ifmgd->p2p_noa_index = -1;
4183
4184         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4185                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4186         else
4187                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4188
4189         /* Setup TDLS data */
4190         spin_lock_init(&ifmgd->teardown_lock);
4191         ifmgd->teardown_skb = NULL;
4192         ifmgd->orig_teardown_skb = NULL;
4193 }
4194
4195 /* scan finished notification */
4196 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4197 {
4198         struct ieee80211_sub_if_data *sdata;
4199
4200         /* Restart STA timers */
4201         rcu_read_lock();
4202         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4203                 if (ieee80211_sdata_running(sdata))
4204                         ieee80211_restart_sta_timer(sdata);
4205         }
4206         rcu_read_unlock();
4207 }
4208
4209 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4210                                      struct cfg80211_bss *cbss)
4211 {
4212         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4213         const u8 *ht_cap_ie, *vht_cap_ie;
4214         const struct ieee80211_ht_cap *ht_cap;
4215         const struct ieee80211_vht_cap *vht_cap;
4216         u8 chains = 1;
4217
4218         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4219                 return chains;
4220
4221         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4222         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4223                 ht_cap = (void *)(ht_cap_ie + 2);
4224                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4225                 /*
4226                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4227                  *       "Tx Unequal Modulation Supported" fields.
4228                  */
4229         }
4230
4231         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4232                 return chains;
4233
4234         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4235         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4236                 u8 nss;
4237                 u16 tx_mcs_map;
4238
4239                 vht_cap = (void *)(vht_cap_ie + 2);
4240                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4241                 for (nss = 8; nss > 0; nss--) {
4242                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4243                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4244                                 break;
4245                 }
4246                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4247                 chains = max(chains, nss);
4248         }
4249
4250         return chains;
4251 }
4252
4253 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4254                                   struct cfg80211_bss *cbss)
4255 {
4256         struct ieee80211_local *local = sdata->local;
4257         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4258         const struct ieee80211_ht_cap *ht_cap = NULL;
4259         const struct ieee80211_ht_operation *ht_oper = NULL;
4260         const struct ieee80211_vht_operation *vht_oper = NULL;
4261         struct ieee80211_supported_band *sband;
4262         struct cfg80211_chan_def chandef;
4263         int ret;
4264         u32 i;
4265         bool have_80mhz;
4266
4267         sband = local->hw.wiphy->bands[cbss->channel->band];
4268
4269         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4270                           IEEE80211_STA_DISABLE_80P80MHZ |
4271                           IEEE80211_STA_DISABLE_160MHZ);
4272
4273         rcu_read_lock();
4274
4275         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4276             sband->ht_cap.ht_supported) {
4277                 const u8 *ht_oper_ie, *ht_cap_ie;
4278
4279                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4280                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4281                         ht_oper = (void *)(ht_oper_ie + 2);
4282
4283                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4284                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4285                         ht_cap = (void *)(ht_cap_ie + 2);
4286
4287                 if (!ht_cap) {
4288                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4289                         ht_oper = NULL;
4290                 }
4291         }
4292
4293         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4294             sband->vht_cap.vht_supported) {
4295                 const u8 *vht_oper_ie, *vht_cap;
4296
4297                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4298                                                    WLAN_EID_VHT_OPERATION);
4299                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4300                         vht_oper = (void *)(vht_oper_ie + 2);
4301                 if (vht_oper && !ht_oper) {
4302                         vht_oper = NULL;
4303                         sdata_info(sdata,
4304                                    "AP advertised VHT without HT, disabling both\n");
4305                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4306                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4307                 }
4308
4309                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4310                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4311                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4312                         vht_oper = NULL;
4313                 }
4314         }
4315
4316         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4317         have_80mhz = false;
4318         for (i = 0; i < sband->n_channels; i++) {
4319                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4320                                                 IEEE80211_CHAN_NO_80MHZ))
4321                         continue;
4322
4323                 have_80mhz = true;
4324                 break;
4325         }
4326
4327         if (!have_80mhz)
4328                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4329
4330         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4331                                                      cbss->channel,
4332                                                      ht_cap, ht_oper, vht_oper,
4333                                                      &chandef, false);
4334
4335         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4336                                       local->rx_chains);
4337
4338         rcu_read_unlock();
4339
4340         /* will change later if needed */
4341         sdata->smps_mode = IEEE80211_SMPS_OFF;
4342
4343         mutex_lock(&local->mtx);
4344         /*
4345          * If this fails (possibly due to channel context sharing
4346          * on incompatible channels, e.g. 80+80 and 160 sharing the
4347          * same control channel) try to use a smaller bandwidth.
4348          */
4349         ret = ieee80211_vif_use_channel(sdata, &chandef,
4350                                         IEEE80211_CHANCTX_SHARED);
4351
4352         /* don't downgrade for 5 and 10 MHz channels, though. */
4353         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4354             chandef.width == NL80211_CHAN_WIDTH_10)
4355                 goto out;
4356
4357         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4358                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4359                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4360                                                 IEEE80211_CHANCTX_SHARED);
4361         }
4362  out:
4363         mutex_unlock(&local->mtx);
4364         return ret;
4365 }
4366
4367 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4368                                      struct cfg80211_bss *cbss, bool assoc,
4369                                      bool override)
4370 {
4371         struct ieee80211_local *local = sdata->local;
4372         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4373         struct ieee80211_bss *bss = (void *)cbss->priv;
4374         struct sta_info *new_sta = NULL;
4375         struct ieee80211_supported_band *sband;
4376         bool have_sta = false;
4377         int err;
4378
4379         sband = local->hw.wiphy->bands[cbss->channel->band];
4380
4381         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4382                 return -EINVAL;
4383
4384         /* If a reconfig is happening, bail out */
4385         if (local->in_reconfig)
4386                 return -EBUSY;
4387
4388         if (assoc) {
4389                 rcu_read_lock();
4390                 have_sta = sta_info_get(sdata, cbss->bssid);
4391                 rcu_read_unlock();
4392         }
4393
4394         if (!have_sta) {
4395                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4396                 if (!new_sta)
4397                         return -ENOMEM;
4398         }
4399
4400         if (new_sta || override) {
4401                 err = ieee80211_prep_channel(sdata, cbss);
4402                 if (err) {
4403                         if (new_sta)
4404                                 sta_info_free(local, new_sta);
4405                         return -EINVAL;
4406                 }
4407         }
4408
4409         if (new_sta) {
4410                 u32 rates = 0, basic_rates = 0;
4411                 bool have_higher_than_11mbit;
4412                 int min_rate = INT_MAX, min_rate_index = -1;
4413                 struct ieee80211_chanctx_conf *chanctx_conf;
4414                 const struct cfg80211_bss_ies *ies;
4415                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4416                 u32 rate_flags;
4417
4418                 rcu_read_lock();
4419                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4420                 if (WARN_ON(!chanctx_conf)) {
4421                         rcu_read_unlock();
4422                         sta_info_free(local, new_sta);
4423                         return -EINVAL;
4424                 }
4425                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4426                 rcu_read_unlock();
4427
4428                 ieee80211_get_rates(sband, bss->supp_rates,
4429                                     bss->supp_rates_len,
4430                                     &rates, &basic_rates,
4431                                     &have_higher_than_11mbit,
4432                                     &min_rate, &min_rate_index,
4433                                     shift, rate_flags);
4434
4435                 /*
4436                  * This used to be a workaround for basic rates missing
4437                  * in the association response frame. Now that we no
4438                  * longer use the basic rates from there, it probably
4439                  * doesn't happen any more, but keep the workaround so
4440                  * in case some *other* APs are buggy in different ways
4441                  * we can connect -- with a warning.
4442                  */
4443                 if (!basic_rates && min_rate_index >= 0) {
4444                         sdata_info(sdata,
4445                                    "No basic rates, using min rate instead\n");
4446                         basic_rates = BIT(min_rate_index);
4447                 }
4448
4449                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4450                 sdata->vif.bss_conf.basic_rates = basic_rates;
4451
4452                 /* cf. IEEE 802.11 9.2.12 */
4453                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4454                     have_higher_than_11mbit)
4455                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4456                 else
4457                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4458
4459                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4460
4461                 /* set timing information */
4462                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4463                 rcu_read_lock();
4464                 ies = rcu_dereference(cbss->beacon_ies);
4465                 if (ies) {
4466                         const u8 *tim_ie;
4467
4468                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4469                         sdata->vif.bss_conf.sync_device_ts =
4470                                 bss->device_ts_beacon;
4471                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4472                                                   ies->data, ies->len);
4473                         if (tim_ie && tim_ie[1] >= 2)
4474                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4475                         else
4476                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4477                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4478                                                TIMING_BEACON_ONLY)) {
4479                         ies = rcu_dereference(cbss->proberesp_ies);
4480                         /* must be non-NULL since beacon IEs were NULL */
4481                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4482                         sdata->vif.bss_conf.sync_device_ts =
4483                                 bss->device_ts_presp;
4484                         sdata->vif.bss_conf.sync_dtim_count = 0;
4485                 } else {
4486                         sdata->vif.bss_conf.sync_tsf = 0;
4487                         sdata->vif.bss_conf.sync_device_ts = 0;
4488                         sdata->vif.bss_conf.sync_dtim_count = 0;
4489                 }
4490                 rcu_read_unlock();
4491
4492                 /* tell driver about BSSID, basic rates and timing */
4493                 ieee80211_bss_info_change_notify(sdata,
4494                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4495                         BSS_CHANGED_BEACON_INT);
4496
4497                 if (assoc)
4498                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4499
4500                 err = sta_info_insert(new_sta);
4501                 new_sta = NULL;
4502                 if (err) {
4503                         sdata_info(sdata,
4504                                    "failed to insert STA entry for the AP (error %d)\n",
4505                                    err);
4506                         return err;
4507                 }
4508         } else
4509                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4510
4511         /* Cancel scan to ensure that nothing interferes with connection */
4512         if (local->scanning)
4513                 ieee80211_scan_cancel(local);
4514
4515         return 0;
4516 }
4517
4518 /* config hooks */
4519 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4520                        struct cfg80211_auth_request *req)
4521 {
4522         struct ieee80211_local *local = sdata->local;
4523         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4524         struct ieee80211_mgd_auth_data *auth_data;
4525         u16 auth_alg;
4526         int err;
4527
4528         /* prepare auth data structure */
4529
4530         switch (req->auth_type) {
4531         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4532                 auth_alg = WLAN_AUTH_OPEN;
4533                 break;
4534         case NL80211_AUTHTYPE_SHARED_KEY:
4535                 if (IS_ERR(local->wep_tx_tfm))
4536                         return -EOPNOTSUPP;
4537                 auth_alg = WLAN_AUTH_SHARED_KEY;
4538                 break;
4539         case NL80211_AUTHTYPE_FT:
4540                 auth_alg = WLAN_AUTH_FT;
4541                 break;
4542         case NL80211_AUTHTYPE_NETWORK_EAP:
4543                 auth_alg = WLAN_AUTH_LEAP;
4544                 break;
4545         case NL80211_AUTHTYPE_SAE:
4546                 auth_alg = WLAN_AUTH_SAE;
4547                 break;
4548         case NL80211_AUTHTYPE_FILS_SK:
4549                 auth_alg = WLAN_AUTH_FILS_SK;
4550                 break;
4551         case NL80211_AUTHTYPE_FILS_SK_PFS:
4552                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4553                 break;
4554         case NL80211_AUTHTYPE_FILS_PK:
4555                 auth_alg = WLAN_AUTH_FILS_PK;
4556                 break;
4557         default:
4558                 return -EOPNOTSUPP;
4559         }
4560
4561         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4562                             req->ie_len, GFP_KERNEL);
4563         if (!auth_data)
4564                 return -ENOMEM;
4565
4566         auth_data->bss = req->bss;
4567
4568         if (req->auth_data_len >= 4) {
4569                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4570                         __le16 *pos = (__le16 *) req->auth_data;
4571
4572                         auth_data->sae_trans = le16_to_cpu(pos[0]);
4573                         auth_data->sae_status = le16_to_cpu(pos[1]);
4574                 }
4575                 memcpy(auth_data->data, req->auth_data + 4,
4576                        req->auth_data_len - 4);
4577                 auth_data->data_len += req->auth_data_len - 4;
4578         }
4579
4580         if (req->ie && req->ie_len) {
4581                 memcpy(&auth_data->data[auth_data->data_len],
4582                        req->ie, req->ie_len);
4583                 auth_data->data_len += req->ie_len;
4584         }
4585
4586         if (req->key && req->key_len) {
4587                 auth_data->key_len = req->key_len;
4588                 auth_data->key_idx = req->key_idx;
4589                 memcpy(auth_data->key, req->key, req->key_len);
4590         }
4591
4592         auth_data->algorithm = auth_alg;
4593
4594         /* try to authenticate/probe */
4595
4596         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4597             ifmgd->assoc_data) {
4598                 err = -EBUSY;
4599                 goto err_free;
4600         }
4601
4602         if (ifmgd->auth_data)
4603                 ieee80211_destroy_auth_data(sdata, false);
4604
4605         /* prep auth_data so we don't go into idle on disassoc */
4606         ifmgd->auth_data = auth_data;
4607
4608         if (ifmgd->associated) {
4609                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4610
4611                 sdata_info(sdata,
4612                            "disconnect from AP %pM for new auth to %pM\n",
4613                            ifmgd->associated->bssid, req->bss->bssid);
4614                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4615                                        WLAN_REASON_UNSPECIFIED,
4616                                        false, frame_buf);
4617
4618                 ieee80211_report_disconnect(sdata, frame_buf,
4619                                             sizeof(frame_buf), true,
4620                                             WLAN_REASON_UNSPECIFIED);
4621         }
4622
4623         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4624
4625         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4626         if (err)
4627                 goto err_clear;
4628
4629         err = ieee80211_auth(sdata);
4630         if (err) {
4631                 sta_info_destroy_addr(sdata, req->bss->bssid);
4632                 goto err_clear;
4633         }
4634
4635         /* hold our own reference */
4636         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4637         return 0;
4638
4639  err_clear:
4640         eth_zero_addr(ifmgd->bssid);
4641         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4642         ifmgd->auth_data = NULL;
4643         mutex_lock(&sdata->local->mtx);
4644         ieee80211_vif_release_channel(sdata);
4645         mutex_unlock(&sdata->local->mtx);
4646  err_free:
4647         kfree(auth_data);
4648         return err;
4649 }
4650
4651 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4652                         struct cfg80211_assoc_request *req)
4653 {
4654         struct ieee80211_local *local = sdata->local;
4655         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4656         struct ieee80211_bss *bss = (void *)req->bss->priv;
4657         struct ieee80211_mgd_assoc_data *assoc_data;
4658         const struct cfg80211_bss_ies *beacon_ies;
4659         struct ieee80211_supported_band *sband;
4660         const u8 *ssidie, *ht_ie, *vht_ie;
4661         int i, err;
4662         bool override = false;
4663
4664         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4665         if (!assoc_data)
4666                 return -ENOMEM;
4667
4668         rcu_read_lock();
4669         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4670         if (!ssidie) {
4671                 rcu_read_unlock();
4672                 kfree(assoc_data);
4673                 return -EINVAL;
4674         }
4675         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4676         assoc_data->ssid_len = ssidie[1];
4677         rcu_read_unlock();
4678
4679         if (ifmgd->associated) {
4680                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4681
4682                 sdata_info(sdata,
4683                            "disconnect from AP %pM for new assoc to %pM\n",
4684                            ifmgd->associated->bssid, req->bss->bssid);
4685                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4686                                        WLAN_REASON_UNSPECIFIED,
4687                                        false, frame_buf);
4688
4689                 ieee80211_report_disconnect(sdata, frame_buf,
4690                                             sizeof(frame_buf), true,
4691                                             WLAN_REASON_UNSPECIFIED);
4692         }
4693
4694         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4695                 err = -EBUSY;
4696                 goto err_free;
4697         }
4698
4699         if (ifmgd->assoc_data) {
4700                 err = -EBUSY;
4701                 goto err_free;
4702         }
4703
4704         if (ifmgd->auth_data) {
4705                 bool match;
4706
4707                 /* keep sta info, bssid if matching */
4708                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4709                 ieee80211_destroy_auth_data(sdata, match);
4710         }
4711
4712         /* prepare assoc data */
4713
4714         ifmgd->beacon_crc_valid = false;
4715
4716         assoc_data->wmm = bss->wmm_used &&
4717                           (local->hw.queues >= IEEE80211_NUM_ACS);
4718
4719         /*
4720          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4721          * We still associate in non-HT mode (11a/b/g) if any one of these
4722          * ciphers is configured as pairwise.
4723          * We can set this to true for non-11n hardware, that'll be checked
4724          * separately along with the peer capabilities.
4725          */
4726         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4727                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4728                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4729                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4730                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4731                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4732                         netdev_info(sdata->dev,
4733                                     "disabling HT/VHT due to WEP/TKIP use\n");
4734                 }
4735         }
4736
4737         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4738         sband = local->hw.wiphy->bands[req->bss->channel->band];
4739         if (!sband->ht_cap.ht_supported ||
4740             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4741             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4742                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4743                 if (!bss->wmm_used &&
4744                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4745                         netdev_info(sdata->dev,
4746                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4747         }
4748
4749         /* disable VHT if we don't support it or the AP doesn't use WMM */
4750         if (!sband->vht_cap.vht_supported ||
4751             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4752             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4753                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4754                 if (!bss->wmm_used &&
4755                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4756                         netdev_info(sdata->dev,
4757                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4758         }
4759
4760         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4761         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4762                sizeof(ifmgd->ht_capa_mask));
4763
4764         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4765         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4766                sizeof(ifmgd->vht_capa_mask));
4767
4768         if (req->ie && req->ie_len) {
4769                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4770                 assoc_data->ie_len = req->ie_len;
4771         }
4772
4773         if (req->fils_kek) {
4774                 /* should already be checked in cfg80211 - so warn */
4775                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4776                         err = -EINVAL;
4777                         goto err_free;
4778                 }
4779                 memcpy(assoc_data->fils_kek, req->fils_kek,
4780                        req->fils_kek_len);
4781                 assoc_data->fils_kek_len = req->fils_kek_len;
4782         }
4783
4784         if (req->fils_nonces)
4785                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4786                        2 * FILS_NONCE_LEN);
4787
4788         assoc_data->bss = req->bss;
4789
4790         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4791                 if (ifmgd->powersave)
4792                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4793                 else
4794                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4795         } else
4796                 sdata->smps_mode = ifmgd->req_smps;
4797
4798         assoc_data->capability = req->bss->capability;
4799         assoc_data->supp_rates = bss->supp_rates;
4800         assoc_data->supp_rates_len = bss->supp_rates_len;
4801
4802         rcu_read_lock();
4803         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4804         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4805                 assoc_data->ap_ht_param =
4806                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4807         else
4808                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4809         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4810         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4811                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4812                        sizeof(struct ieee80211_vht_cap));
4813         else
4814                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4815         rcu_read_unlock();
4816
4817         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4818                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4819              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4820                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4821
4822         if (bss->wmm_used && bss->uapsd_supported &&
4823             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4824                 assoc_data->uapsd = true;
4825                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4826         } else {
4827                 assoc_data->uapsd = false;
4828                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4829         }
4830
4831         if (req->prev_bssid)
4832                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4833
4834         if (req->use_mfp) {
4835                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4836                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4837         } else {
4838                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4839                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4840         }
4841
4842         if (req->flags & ASSOC_REQ_USE_RRM)
4843                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4844         else
4845                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4846
4847         if (req->crypto.control_port)
4848                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4849         else
4850                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4851
4852         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4853         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4854         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4855                                                         sdata->vif.type);
4856
4857         /* kick off associate process */
4858
4859         ifmgd->assoc_data = assoc_data;
4860         ifmgd->dtim_period = 0;
4861         ifmgd->have_beacon = false;
4862
4863         /* override HT/VHT configuration only if the AP and we support it */
4864         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4865                 struct ieee80211_sta_ht_cap sta_ht_cap;
4866
4867                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4868                         override = true;
4869
4870                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4871                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4872
4873                 /* check for 40 MHz disable override */
4874                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4875                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4876                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4877                         override = true;
4878
4879                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4880                     req->flags & ASSOC_REQ_DISABLE_VHT)
4881                         override = true;
4882         }
4883
4884         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4885                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4886                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4887         }
4888
4889         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4890                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4891
4892         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4893         if (err)
4894                 goto err_clear;
4895
4896         rcu_read_lock();
4897         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4898
4899         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4900             !beacon_ies) {
4901                 /*
4902                  * Wait up to one beacon interval ...
4903                  * should this be more if we miss one?
4904                  */
4905                 sdata_info(sdata, "waiting for beacon from %pM\n",
4906                            ifmgd->bssid);
4907                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4908                 assoc_data->timeout_started = true;
4909                 assoc_data->need_beacon = true;
4910         } else if (beacon_ies) {
4911                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4912                                                     beacon_ies->data,
4913                                                     beacon_ies->len);
4914                 u8 dtim_count = 0;
4915
4916                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4917                         const struct ieee80211_tim_ie *tim;
4918                         tim = (void *)(tim_ie + 2);
4919                         ifmgd->dtim_period = tim->dtim_period;
4920                         dtim_count = tim->dtim_count;
4921                 }
4922                 ifmgd->have_beacon = true;
4923                 assoc_data->timeout = jiffies;
4924                 assoc_data->timeout_started = true;
4925
4926                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4927                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4928                         sdata->vif.bss_conf.sync_device_ts =
4929                                 bss->device_ts_beacon;
4930                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4931                 }
4932         } else {
4933                 assoc_data->timeout = jiffies;
4934                 assoc_data->timeout_started = true;
4935         }
4936         rcu_read_unlock();
4937
4938         run_again(sdata, assoc_data->timeout);
4939
4940         if (bss->corrupt_data) {
4941                 char *corrupt_type = "data";
4942                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4943                         if (bss->corrupt_data &
4944                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4945                                 corrupt_type = "beacon and probe response";
4946                         else
4947                                 corrupt_type = "beacon";
4948                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4949                         corrupt_type = "probe response";
4950                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4951                            corrupt_type);
4952         }
4953
4954         return 0;
4955  err_clear:
4956         eth_zero_addr(ifmgd->bssid);
4957         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4958         ifmgd->assoc_data = NULL;
4959  err_free:
4960         kfree(assoc_data);
4961         return err;
4962 }
4963
4964 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4965                          struct cfg80211_deauth_request *req)
4966 {
4967         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4968         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4969         bool tx = !req->local_state_change;
4970
4971         if (ifmgd->auth_data &&
4972             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4973                 sdata_info(sdata,
4974                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4975                            req->bssid, req->reason_code,
4976                            ieee80211_get_reason_code_string(req->reason_code));
4977
4978                 drv_mgd_prepare_tx(sdata->local, sdata);
4979                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4980                                                IEEE80211_STYPE_DEAUTH,
4981                                                req->reason_code, tx,
4982                                                frame_buf);
4983                 ieee80211_destroy_auth_data(sdata, false);
4984                 ieee80211_report_disconnect(sdata, frame_buf,
4985                                             sizeof(frame_buf), true,
4986                                             req->reason_code);
4987
4988                 return 0;
4989         }
4990
4991         if (ifmgd->assoc_data &&
4992             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4993                 sdata_info(sdata,
4994                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4995                            req->bssid, req->reason_code,
4996                            ieee80211_get_reason_code_string(req->reason_code));
4997
4998                 drv_mgd_prepare_tx(sdata->local, sdata);
4999                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5000                                                IEEE80211_STYPE_DEAUTH,
5001                                                req->reason_code, tx,
5002                                                frame_buf);
5003                 ieee80211_destroy_assoc_data(sdata, false, true);
5004                 ieee80211_report_disconnect(sdata, frame_buf,
5005                                             sizeof(frame_buf), true,
5006                                             req->reason_code);
5007                 return 0;
5008         }
5009
5010         if (ifmgd->associated &&
5011             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5012                 sdata_info(sdata,
5013                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5014                            req->bssid, req->reason_code,
5015                            ieee80211_get_reason_code_string(req->reason_code));
5016
5017                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5018                                        req->reason_code, tx, frame_buf);
5019                 ieee80211_report_disconnect(sdata, frame_buf,
5020                                             sizeof(frame_buf), true,
5021                                             req->reason_code);
5022                 return 0;
5023         }
5024
5025         return -ENOTCONN;
5026 }
5027
5028 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5029                            struct cfg80211_disassoc_request *req)
5030 {
5031         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5032         u8 bssid[ETH_ALEN];
5033         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5034
5035         /*
5036          * cfg80211 should catch this ... but it's racy since
5037          * we can receive a disassoc frame, process it, hand it
5038          * to cfg80211 while that's in a locked section already
5039          * trying to tell us that the user wants to disconnect.
5040          */
5041         if (ifmgd->associated != req->bss)
5042                 return -ENOLINK;
5043
5044         sdata_info(sdata,
5045                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5046                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5047
5048         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5049         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5050                                req->reason_code, !req->local_state_change,
5051                                frame_buf);
5052
5053         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5054                                     req->reason_code);
5055
5056         return 0;
5057 }
5058
5059 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5060 {
5061         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5062
5063         /*
5064          * Make sure some work items will not run after this,
5065          * they will not do anything but might not have been
5066          * cancelled when disconnecting.
5067          */
5068         cancel_work_sync(&ifmgd->monitor_work);
5069         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5070         cancel_work_sync(&ifmgd->request_smps_work);
5071         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5072         cancel_work_sync(&ifmgd->chswitch_work);
5073         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5074
5075         sdata_lock(sdata);
5076         if (ifmgd->assoc_data) {
5077                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5078                 ieee80211_destroy_assoc_data(sdata, false, false);
5079                 cfg80211_assoc_timeout(sdata->dev, bss);
5080         }
5081         if (ifmgd->auth_data)
5082                 ieee80211_destroy_auth_data(sdata, false);
5083         spin_lock_bh(&ifmgd->teardown_lock);
5084         if (ifmgd->teardown_skb) {
5085                 kfree_skb(ifmgd->teardown_skb);
5086                 ifmgd->teardown_skb = NULL;
5087                 ifmgd->orig_teardown_skb = NULL;
5088         }
5089         spin_unlock_bh(&ifmgd->teardown_lock);
5090         del_timer_sync(&ifmgd->timer);
5091         sdata_unlock(sdata);
5092 }
5093
5094 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5095                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5096                                s32 rssi_level,
5097                                gfp_t gfp)
5098 {
5099         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5100
5101         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5102
5103         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5104 }
5105 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5106
5107 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5108 {
5109         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5110
5111         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5112
5113         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5114 }
5115 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);