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  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  34 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  35 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  36 #define IEEE80211_AUTH_MAX_TRIES        3
  37 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  38 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  39 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  40 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  41 #define IEEE80211_ASSOC_MAX_TRIES       3
  42
  43 static int max_nullfunc_tries = 2;
  44 module_param(max_nullfunc_tries, int, 0644);
  45 MODULE_PARM_DESC(max_nullfunc_tries,
  46                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  47
  48 static int max_probe_tries = 5;
  49 module_param(max_probe_tries, int, 0644);
  50 MODULE_PARM_DESC(max_probe_tries,
  51                  "Maximum probe tries before disconnecting (reason 4).");
  52
  53 /*
  54  * Beacon loss timeout is calculated as N frames times the
  55  * advertised beacon interval.  This may need to be somewhat
  56  * higher than what hardware might detect to account for
  57  * delays in the host processing frames. But since we also
  58  * probe on beacon miss before declaring the connection lost
  59  * default to what we want.
  60  */
  61 static int beacon_loss_count = 7;
  62 module_param(beacon_loss_count, int, 0644);
  63 MODULE_PARM_DESC(beacon_loss_count,
  64                  "Number of beacon intervals before we decide beacon was lost.");
  65
  66 /*
  67  * Time the connection can be idle before we probe
  68  * it to see if we can still talk to the AP.
  69  */
  70 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  71 /*
  72  * Time we wait for a probe response after sending
  73  * a probe request because of beacon loss or for
  74  * checking the connection still works.
  75  */
  76 static int probe_wait_ms = 500;
  77 module_param(probe_wait_ms, int, 0644);
  78 MODULE_PARM_DESC(probe_wait_ms,
  79                  "Maximum time(ms) to wait for probe response"
  80                  " before disconnecting (reason 4).");
  81
  82 /*
  83  * Weight given to the latest Beacon frame when calculating average signal
  84  * strength for Beacon frames received in the current BSS. This must be
  85  * between 1 and 15.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  88
  89 /*
  90  * How many Beacon frames need to have been used in average signal strength
  91  * before starting to indicate signal change events.
  92  */
  93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  94
  95 /*
  96  * We can have multiple work items (and connection probing)
  97  * scheduling this timer, but we need to take care to only
  98  * reschedule it when it should fire _earlier_ than it was
  99  * asked for before, or if it's not pending right now. This
 100  * function ensures that. Note that it then is required to
 101  * run this function for all timeouts after the first one
 102  * has happened -- the work that runs from this timer will
 103  * do that.
 104  */
 105 static void run_again(struct ieee80211_sub_if_data *sdata,
 106                       unsigned long timeout)
 107 {
 108         sdata_assert_lock(sdata);
 109
 110         if (!timer_pending(&sdata->u.mgd.timer) ||
 111             time_before(timeout, sdata->u.mgd.timer.expires))
 112                 mod_timer(&sdata->u.mgd.timer, timeout);
 113 }
 114
 115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 116 {
 117         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 118                 return;
 119
 120         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 121                 return;
 122
 123         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 124                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 125 }
 126
 127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 128 {
 129         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 130
 131         if (unlikely(!sdata->u.mgd.associated))
 132                 return;
 133
 134         ifmgd->probe_send_count = 0;
 135
 136         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 137                 return;
 138
 139         mod_timer(&sdata->u.mgd.conn_mon_timer,
 140                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 141 }
 142
 143 static int ecw2cw(int ecw)
 144 {
 145         return (1 << ecw) - 1;
 146 }
 147
 148 static u32
 149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 150                              struct ieee80211_supported_band *sband,
 151                              struct ieee80211_channel *channel,
 152                              const struct ieee80211_ht_operation *ht_oper,
 153                              const struct ieee80211_vht_operation *vht_oper,
 154                              struct cfg80211_chan_def *chandef, bool tracking)
 155 {
 156         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 157         struct cfg80211_chan_def vht_chandef;
 158         u32 ht_cfreq, ret;
 159
 160         chandef->chan = channel;
 161         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 162         chandef->center_freq1 = channel->center_freq;
 163         chandef->center_freq2 = 0;
 164
 165         if (!ht_oper || !sband->ht_cap.ht_supported) {
 166                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 167                 goto out;
 168         }
 169
 170         chandef->width = NL80211_CHAN_WIDTH_20;
 171
 172         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 173                                                   channel->band);
 174         /* check that channel matches the right operating channel */
 175         if (!tracking && channel->center_freq != ht_cfreq) {
 176                 /*
 177                  * It's possible that some APs are confused here;
 178                  * Netgear WNDR3700 sometimes reports 4 higher than
 179                  * the actual channel in association responses, but
 180                  * since we look at probe response/beacon data here
 181                  * it should be OK.
 182                  */
 183                 sdata_info(sdata,
 184                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 185                            channel->center_freq, ht_cfreq,
 186                            ht_oper->primary_chan, channel->band);
 187                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 188                 goto out;
 189         }
 190
 191         /* check 40 MHz support, if we have it */
 192         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 193                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 194                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 195                         chandef->width = NL80211_CHAN_WIDTH_40;
 196                         chandef->center_freq1 += 10;
 197                         break;
 198                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 199                         chandef->width = NL80211_CHAN_WIDTH_40;
 200                         chandef->center_freq1 -= 10;
 201                         break;
 202                 }
 203         } else {
 204                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 205                 ret = IEEE80211_STA_DISABLE_VHT;
 206                 /* also mark 40 MHz disabled */
 207                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 208                 goto out;
 209         }
 210
 211         if (!vht_oper || !sband->vht_cap.vht_supported) {
 212                 ret = IEEE80211_STA_DISABLE_VHT;
 213                 goto out;
 214         }
 215
 216         vht_chandef.chan = channel;
 217         vht_chandef.center_freq1 =
 218                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 219                                                channel->band);
 220         vht_chandef.center_freq2 = 0;
 221
 222         switch (vht_oper->chan_width) {
 223         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 224                 vht_chandef.width = chandef->width;
 225                 vht_chandef.center_freq1 = chandef->center_freq1;
 226                 break;
 227         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 228                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 229                 break;
 230         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 231                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 232                 break;
 233         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 234                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 235                 vht_chandef.center_freq2 =
 236                         ieee80211_channel_to_frequency(
 237                                 vht_oper->center_freq_seg2_idx,
 238                                 channel->band);
 239                 break;
 240         default:
 241                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 242                         sdata_info(sdata,
 243                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 244                                    vht_oper->chan_width);
 245                 ret = IEEE80211_STA_DISABLE_VHT;
 246                 goto out;
 247         }
 248
 249         if (!cfg80211_chandef_valid(&vht_chandef)) {
 250                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 251                         sdata_info(sdata,
 252                                    "AP VHT information is invalid, disable VHT\n");
 253                 ret = IEEE80211_STA_DISABLE_VHT;
 254                 goto out;
 255         }
 256
 257         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 258                 ret = 0;
 259                 goto out;
 260         }
 261
 262         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 263                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 264                         sdata_info(sdata,
 265                                    "AP VHT information doesn't match HT, disable VHT\n");
 266                 ret = IEEE80211_STA_DISABLE_VHT;
 267                 goto out;
 268         }
 269
 270         *chandef = vht_chandef;
 271
 272         ret = 0;
 273
 274 out:
 275         /*
 276          * When tracking the current AP, don't do any further checks if the
 277          * new chandef is identical to the one we're currently using for the
 278          * connection. This keeps us from playing ping-pong with regulatory,
 279          * without it the following can happen (for example):
 280          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 281          *  - AP advertises regdom US
 282          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 283          *  - the code below detects an unsupported channel, downgrades, and
 284          *    we disconnect from the AP in the caller
 285          *  - disconnect causes CRDA to reload world regdomain and the game
 286          *    starts anew.
 287          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 288          *
 289          * It seems possible that there are still scenarios with CSA or real
 290          * bandwidth changes where a this could happen, but those cases are
 291          * less common and wouldn't completely prevent using the AP.
 292          */
 293         if (tracking &&
 294             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 295                 return ret;
 296
 297         /* don't print the message below for VHT mismatch if VHT is disabled */
 298         if (ret & IEEE80211_STA_DISABLE_VHT)
 299                 vht_chandef = *chandef;
 300
 301         /*
 302          * Ignore the DISABLED flag when we're already connected and only
 303          * tracking the APs beacon for bandwidth changes - otherwise we
 304          * might get disconnected here if we connect to an AP, update our
 305          * regulatory information based on the AP's country IE and the
 306          * information we have is wrong/outdated and disables the channel
 307          * that we're actually using for the connection to the AP.
 308          */
 309         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 310                                         tracking ? 0 :
 311                                                    IEEE80211_CHAN_DISABLED)) {
 312                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 313                         ret = IEEE80211_STA_DISABLE_HT |
 314                               IEEE80211_STA_DISABLE_VHT;
 315                         break;
 316                 }
 317
 318                 ret |= ieee80211_chandef_downgrade(chandef);
 319         }
 320
 321         if (chandef->width != vht_chandef.width && !tracking)
 322                 sdata_info(sdata,
 323                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 324
 325         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 326         return ret;
 327 }
 328
 329 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 330                                struct sta_info *sta,
 331                                const struct ieee80211_ht_operation *ht_oper,
 332                                const struct ieee80211_vht_operation *vht_oper,
 333                                const u8 *bssid, u32 *changed)
 334 {
 335         struct ieee80211_local *local = sdata->local;
 336         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 337         struct ieee80211_supported_band *sband;
 338         struct ieee80211_channel *chan;
 339         struct cfg80211_chan_def chandef;
 340         u16 ht_opmode;
 341         u32 flags;
 342         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 343         int ret;
 344
 345         /* if HT was/is disabled, don't track any bandwidth changes */
 346         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 347                 return 0;
 348
 349         /* don't check VHT if we associated as non-VHT station */
 350         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 351                 vht_oper = NULL;
 352
 353         if (WARN_ON_ONCE(!sta))
 354                 return -EINVAL;
 355
 356         /*
 357          * if bss configuration changed store the new one -
 358          * this may be applicable even if channel is identical
 359          */
 360         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 361         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 362                 *changed |= BSS_CHANGED_HT;
 363                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 364         }
 365
 366         chan = sdata->vif.bss_conf.chandef.chan;
 367         sband = local->hw.wiphy->bands[chan->band];
 368
 369         /* calculate new channel (type) based on HT/VHT operation IEs */
 370         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 371                                              vht_oper, &chandef, true);
 372
 373         /*
 374          * Downgrade the new channel if we associated with restricted
 375          * capabilities. For example, if we associated as a 20 MHz STA
 376          * to a 40 MHz AP (due to regulatory, capabilities or config
 377          * reasons) then switching to a 40 MHz channel now won't do us
 378          * any good -- we couldn't use it with the AP.
 379          */
 380         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 381             chandef.width == NL80211_CHAN_WIDTH_80P80)
 382                 flags |= ieee80211_chandef_downgrade(&chandef);
 383         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 384             chandef.width == NL80211_CHAN_WIDTH_160)
 385                 flags |= ieee80211_chandef_downgrade(&chandef);
 386         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 387             chandef.width > NL80211_CHAN_WIDTH_20)
 388                 flags |= ieee80211_chandef_downgrade(&chandef);
 389
 390         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 391                 return 0;
 392
 393         sdata_info(sdata,
 394                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 395                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 396                    chandef.center_freq1, chandef.center_freq2);
 397
 398         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 399                                       IEEE80211_STA_DISABLE_VHT |
 400                                       IEEE80211_STA_DISABLE_40MHZ |
 401                                       IEEE80211_STA_DISABLE_80P80MHZ |
 402                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 403             !cfg80211_chandef_valid(&chandef)) {
 404                 sdata_info(sdata,
 405                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 406                            ifmgd->bssid);
 407                 return -EINVAL;
 408         }
 409
 410         switch (chandef.width) {
 411         case NL80211_CHAN_WIDTH_20_NOHT:
 412         case NL80211_CHAN_WIDTH_20:
 413                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 414                 break;
 415         case NL80211_CHAN_WIDTH_40:
 416                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 417                 break;
 418         case NL80211_CHAN_WIDTH_80:
 419                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 420                 break;
 421         case NL80211_CHAN_WIDTH_80P80:
 422         case NL80211_CHAN_WIDTH_160:
 423                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 424                 break;
 425         default:
 426                 return -EINVAL;
 427         }
 428
 429         if (new_sta_bw > sta->cur_max_bandwidth)
 430                 new_sta_bw = sta->cur_max_bandwidth;
 431
 432         if (new_sta_bw < sta->sta.bandwidth) {
 433                 sta->sta.bandwidth = new_sta_bw;
 434                 rate_control_rate_update(local, sband, sta,
 435                                          IEEE80211_RC_BW_CHANGED);
 436         }
 437
 438         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 439         if (ret) {
 440                 sdata_info(sdata,
 441                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 442                            ifmgd->bssid);
 443                 return ret;
 444         }
 445
 446         if (new_sta_bw > sta->sta.bandwidth) {
 447                 sta->sta.bandwidth = new_sta_bw;
 448                 rate_control_rate_update(local, sband, sta,
 449                                          IEEE80211_RC_BW_CHANGED);
 450         }
 451
 452         return 0;
 453 }
 454
 455 /* frame sending functions */
 456
 457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 458                                 struct sk_buff *skb, u8 ap_ht_param,
 459                                 struct ieee80211_supported_band *sband,
 460                                 struct ieee80211_channel *channel,
 461                                 enum ieee80211_smps_mode smps)
 462 {
 463         u8 *pos;
 464         u32 flags = channel->flags;
 465         u16 cap;
 466         struct ieee80211_sta_ht_cap ht_cap;
 467
 468         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 469
 470         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 471         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 472
 473         /* determine capability flags */
 474         cap = ht_cap.cap;
 475
 476         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 477         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 478                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 479                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 480                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 481                 }
 482                 break;
 483         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 484                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 485                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 486                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 487                 }
 488                 break;
 489         }
 490
 491         /*
 492          * If 40 MHz was disabled associate as though we weren't
 493          * capable of 40 MHz -- some broken APs will never fall
 494          * back to trying to transmit in 20 MHz.
 495          */
 496         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 497                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 498                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 499         }
 500
 501         /* set SM PS mode properly */
 502         cap &= ~IEEE80211_HT_CAP_SM_PS;
 503         switch (smps) {
 504         case IEEE80211_SMPS_AUTOMATIC:
 505         case IEEE80211_SMPS_NUM_MODES:
 506                 WARN_ON(1);
 507         case IEEE80211_SMPS_OFF:
 508                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 509                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 510                 break;
 511         case IEEE80211_SMPS_STATIC:
 512                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 513                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 514                 break;
 515         case IEEE80211_SMPS_DYNAMIC:
 516                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 517                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 518                 break;
 519         }
 520
 521         /* reserve and fill IE */
 522         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 523         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 524 }
 525
 526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 527                                  struct sk_buff *skb,
 528                                  struct ieee80211_supported_band *sband,
 529                                  struct ieee80211_vht_cap *ap_vht_cap)
 530 {
 531         u8 *pos;
 532         u32 cap;
 533         struct ieee80211_sta_vht_cap vht_cap;
 534         u32 mask, ap_bf_sts, our_bf_sts;
 535
 536         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 537
 538         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 539         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 540
 541         /* determine capability flags */
 542         cap = vht_cap.cap;
 543
 544         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 545                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 546                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 547         }
 548
 549         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 550                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 551                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 552         }
 553
 554         /*
 555          * Some APs apparently get confused if our capabilities are better
 556          * than theirs, so restrict what we advertise in the assoc request.
 557          */
 558         if (!(ap_vht_cap->vht_cap_info &
 559                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 560                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 561
 562         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 563
 564         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 565         our_bf_sts = cap & mask;
 566
 567         if (ap_bf_sts < our_bf_sts) {
 568                 cap &= ~mask;
 569                 cap |= ap_bf_sts;
 570         }
 571
 572         /* reserve and fill IE */
 573         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 574         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 575 }
 576
 577 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 578 {
 579         struct ieee80211_local *local = sdata->local;
 580         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 581         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 582         struct sk_buff *skb;
 583         struct ieee80211_mgmt *mgmt;
 584         u8 *pos, qos_info;
 585         size_t offset = 0, noffset;
 586         int i, count, rates_len, supp_rates_len, shift;
 587         u16 capab;
 588         struct ieee80211_supported_band *sband;
 589         struct ieee80211_chanctx_conf *chanctx_conf;
 590         struct ieee80211_channel *chan;
 591         u32 rate_flags, rates = 0;
 592
 593         sdata_assert_lock(sdata);
 594
 595         rcu_read_lock();
 596         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 597         if (WARN_ON(!chanctx_conf)) {
 598                 rcu_read_unlock();
 599                 return;
 600         }
 601         chan = chanctx_conf->def.chan;
 602         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 603         rcu_read_unlock();
 604         sband = local->hw.wiphy->bands[chan->band];
 605         shift = ieee80211_vif_get_shift(&sdata->vif);
 606
 607         if (assoc_data->supp_rates_len) {
 608                 /*
 609                  * Get all rates supported by the device and the AP as
 610                  * some APs don't like getting a superset of their rates
 611                  * in the association request (e.g. D-Link DAP 1353 in
 612                  * b-only mode)...
 613                  */
 614                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 615                                                      assoc_data->supp_rates,
 616                                                      assoc_data->supp_rates_len,
 617                                                      &rates);
 618         } else {
 619                 /*
 620                  * In case AP not provide any supported rates information
 621                  * before association, we send information element(s) with
 622                  * all rates that we support.
 623                  */
 624                 rates_len = 0;
 625                 for (i = 0; i < sband->n_bitrates; i++) {
 626                         if ((rate_flags & sband->bitrates[i].flags)
 627                             != rate_flags)
 628                                 continue;
 629                         rates |= BIT(i);
 630                         rates_len++;
 631                 }
 632         }
 633
 634         skb = alloc_skb(local->hw.extra_tx_headroom +
 635                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 636                         2 + assoc_data->ssid_len + /* SSID */
 637                         4 + rates_len + /* (extended) rates */
 638                         4 + /* power capability */
 639                         2 + 2 * sband->n_channels + /* supported channels */
 640                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 641                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 642                         assoc_data->ie_len + /* extra IEs */
 643                         9, /* WMM */
 644                         GFP_KERNEL);
 645         if (!skb)
 646                 return;
 647
 648         skb_reserve(skb, local->hw.extra_tx_headroom);
 649
 650         capab = WLAN_CAPABILITY_ESS;
 651
 652         if (sband->band == IEEE80211_BAND_2GHZ) {
 653                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 654                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 655                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 656                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 657         }
 658
 659         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 660                 capab |= WLAN_CAPABILITY_PRIVACY;
 661
 662         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 663             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 664                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 665
 666         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 667         memset(mgmt, 0, 24);
 668         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 669         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 670         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 671
 672         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 673                 skb_put(skb, 10);
 674                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 675                                                   IEEE80211_STYPE_REASSOC_REQ);
 676                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 677                 mgmt->u.reassoc_req.listen_interval =
 678                                 cpu_to_le16(local->hw.conf.listen_interval);
 679                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 680                        ETH_ALEN);
 681         } else {
 682                 skb_put(skb, 4);
 683                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 684                                                   IEEE80211_STYPE_ASSOC_REQ);
 685                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 686                 mgmt->u.assoc_req.listen_interval =
 687                                 cpu_to_le16(local->hw.conf.listen_interval);
 688         }
 689
 690         /* SSID */
 691         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 692         *pos++ = WLAN_EID_SSID;
 693         *pos++ = assoc_data->ssid_len;
 694         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 695
 696         /* add all rates which were marked to be used above */
 697         supp_rates_len = rates_len;
 698         if (supp_rates_len > 8)
 699                 supp_rates_len = 8;
 700
 701         pos = skb_put(skb, supp_rates_len + 2);
 702         *pos++ = WLAN_EID_SUPP_RATES;
 703         *pos++ = supp_rates_len;
 704
 705         count = 0;
 706         for (i = 0; i < sband->n_bitrates; i++) {
 707                 if (BIT(i) & rates) {
 708                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 709                                                 5 * (1 << shift));
 710                         *pos++ = (u8) rate;
 711                         if (++count == 8)
 712                                 break;
 713                 }
 714         }
 715
 716         if (rates_len > count) {
 717                 pos = skb_put(skb, rates_len - count + 2);
 718                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 719                 *pos++ = rates_len - count;
 720
 721                 for (i++; i < sband->n_bitrates; i++) {
 722                         if (BIT(i) & rates) {
 723                                 int rate;
 724                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 725                                                     5 * (1 << shift));
 726                                 *pos++ = (u8) rate;
 727                         }
 728                 }
 729         }
 730
 731         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 732                 /* 1. power capabilities */
 733                 pos = skb_put(skb, 4);
 734                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 735                 *pos++ = 2;
 736                 *pos++ = 0; /* min tx power */
 737                  /* max tx power */
 738                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 739
 740                 /* 2. supported channels */
 741                 /* TODO: get this in reg domain format */
 742                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 743                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 744                 *pos++ = 2 * sband->n_channels;
 745                 for (i = 0; i < sband->n_channels; i++) {
 746                         *pos++ = ieee80211_frequency_to_channel(
 747                                         sband->channels[i].center_freq);
 748                         *pos++ = 1; /* one channel in the subband*/
 749                 }
 750         }
 751
 752         /* if present, add any custom IEs that go before HT */
 753         if (assoc_data->ie_len) {
 754                 static const u8 before_ht[] = {
 755                         WLAN_EID_SSID,
 756                         WLAN_EID_SUPP_RATES,
 757                         WLAN_EID_EXT_SUPP_RATES,
 758                         WLAN_EID_PWR_CAPABILITY,
 759                         WLAN_EID_SUPPORTED_CHANNELS,
 760                         WLAN_EID_RSN,
 761                         WLAN_EID_QOS_CAPA,
 762                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 763                         WLAN_EID_MOBILITY_DOMAIN,
 764                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 765                 };
 766                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 767                                              before_ht, ARRAY_SIZE(before_ht),
 768                                              offset);
 769                 pos = skb_put(skb, noffset - offset);
 770                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 771                 offset = noffset;
 772         }
 773
 774         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 775                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 776                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 777
 778         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 779                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 780                                     sband, chan, sdata->smps_mode);
 781
 782         /* if present, add any custom IEs that go before VHT */
 783         if (assoc_data->ie_len) {
 784                 static const u8 before_vht[] = {
 785                         WLAN_EID_SSID,
 786                         WLAN_EID_SUPP_RATES,
 787                         WLAN_EID_EXT_SUPP_RATES,
 788                         WLAN_EID_PWR_CAPABILITY,
 789                         WLAN_EID_SUPPORTED_CHANNELS,
 790                         WLAN_EID_RSN,
 791                         WLAN_EID_QOS_CAPA,
 792                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 793                         WLAN_EID_MOBILITY_DOMAIN,
 794                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 795                         WLAN_EID_HT_CAPABILITY,
 796                         WLAN_EID_BSS_COEX_2040,
 797                         WLAN_EID_EXT_CAPABILITY,
 798                         WLAN_EID_QOS_TRAFFIC_CAPA,
 799                         WLAN_EID_TIM_BCAST_REQ,
 800                         WLAN_EID_INTERWORKING,
 801                 };
 802                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 803                                              before_vht, ARRAY_SIZE(before_vht),
 804                                              offset);
 805                 pos = skb_put(skb, noffset - offset);
 806                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 807                 offset = noffset;
 808         }
 809
 810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 811                 ieee80211_add_vht_ie(sdata, skb, sband,
 812                                      &assoc_data->ap_vht_cap);
 813
 814         /* if present, add any custom non-vendor IEs that go after HT */
 815         if (assoc_data->ie_len) {
 816                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 817                                                     assoc_data->ie_len,
 818                                                     offset);
 819                 pos = skb_put(skb, noffset - offset);
 820                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 821                 offset = noffset;
 822         }
 823
 824         if (assoc_data->wmm) {
 825                 if (assoc_data->uapsd) {
 826                         qos_info = ifmgd->uapsd_queues;
 827                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 828                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 829                 } else {
 830                         qos_info = 0;
 831                 }
 832
 833                 pos = skb_put(skb, 9);
 834                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 835                 *pos++ = 7; /* len */
 836                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 837                 *pos++ = 0x50;
 838                 *pos++ = 0xf2;
 839                 *pos++ = 2; /* WME */
 840                 *pos++ = 0; /* WME info */
 841                 *pos++ = 1; /* WME ver */
 842                 *pos++ = qos_info;
 843         }
 844
 845         /* add any remaining custom (i.e. vendor specific here) IEs */
 846         if (assoc_data->ie_len) {
 847                 noffset = assoc_data->ie_len;
 848                 pos = skb_put(skb, noffset - offset);
 849                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 850         }
 851
 852         drv_mgd_prepare_tx(local, sdata);
 853
 854         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 855         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 856                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 857                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 858         ieee80211_tx_skb(sdata, skb);
 859 }
 860
 861 void ieee80211_send_pspoll(struct ieee80211_local *local,
 862                            struct ieee80211_sub_if_data *sdata)
 863 {
 864         struct ieee80211_pspoll *pspoll;
 865         struct sk_buff *skb;
 866
 867         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 868         if (!skb)
 869                 return;
 870
 871         pspoll = (struct ieee80211_pspoll *) skb->data;
 872         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 873
 874         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 875         ieee80211_tx_skb(sdata, skb);
 876 }
 877
 878 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 879                              struct ieee80211_sub_if_data *sdata,
 880                              int powersave)
 881 {
 882         struct sk_buff *skb;
 883         struct ieee80211_hdr_3addr *nullfunc;
 884         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 885
 886         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 887         if (!skb)
 888                 return;
 889
 890         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 891         if (powersave)
 892                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 893
 894         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 895                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 896
 897         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 898                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 899
 900         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 901                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 902
 903         ieee80211_tx_skb(sdata, skb);
 904 }
 905
 906 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 907                                           struct ieee80211_sub_if_data *sdata)
 908 {
 909         struct sk_buff *skb;
 910         struct ieee80211_hdr *nullfunc;
 911         __le16 fc;
 912
 913         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 914                 return;
 915
 916         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 917         if (!skb)
 918                 return;
 919
 920         skb_reserve(skb, local->hw.extra_tx_headroom);
 921
 922         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 923         memset(nullfunc, 0, 30);
 924         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 925                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 926         nullfunc->frame_control = fc;
 927         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 928         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 929         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 930         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 931
 932         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 933         ieee80211_tx_skb(sdata, skb);
 934 }
 935
 936 /* spectrum management related things */
 937 static void ieee80211_chswitch_work(struct work_struct *work)
 938 {
 939         struct ieee80211_sub_if_data *sdata =
 940                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 941         struct ieee80211_local *local = sdata->local;
 942         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 943         u32 changed = 0;
 944         int ret;
 945
 946         if (!ieee80211_sdata_running(sdata))
 947                 return;
 948
 949         sdata_lock(sdata);
 950         if (!ifmgd->associated)
 951                 goto out;
 952
 953         mutex_lock(&local->mtx);
 954         ret = ieee80211_vif_change_channel(sdata, &changed);
 955         mutex_unlock(&local->mtx);
 956         if (ret) {
 957                 sdata_info(sdata,
 958                            "vif channel switch failed, disconnecting\n");
 959                 ieee80211_queue_work(&sdata->local->hw,
 960                                      &ifmgd->csa_connection_drop_work);
 961                 goto out;
 962         }
 963
 964         if (!local->use_chanctx) {
 965                 local->_oper_chandef = sdata->csa_chandef;
 966                 /* Call "hw_config" only if doing sw channel switch.
 967                  * Otherwise update the channel directly
 968                  */
 969                 if (!local->ops->channel_switch)
 970                         ieee80211_hw_config(local, 0);
 971                 else
 972                         local->hw.conf.chandef = local->_oper_chandef;
 973         }
 974
 975         /* XXX: shouldn't really modify cfg80211-owned data! */
 976         ifmgd->associated->channel = sdata->csa_chandef.chan;
 977
 978         /* XXX: wait for a beacon first? */
 979         ieee80211_wake_queues_by_reason(&local->hw,
 980                                         IEEE80211_MAX_QUEUE_MAP,
 981                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 982
 983         ieee80211_bss_info_change_notify(sdata, changed);
 984
 985  out:
 986         sdata->vif.csa_active = false;
 987         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 988         sdata_unlock(sdata);
 989 }
 990
 991 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 992 {
 993         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 994         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 995
 996         trace_api_chswitch_done(sdata, success);
 997         if (!success) {
 998                 sdata_info(sdata,
 999                            "driver channel switch failed, disconnecting\n");
1000                 ieee80211_queue_work(&sdata->local->hw,
1001                                      &ifmgd->csa_connection_drop_work);
1002         } else {
1003                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1004         }
1005 }
1006 EXPORT_SYMBOL(ieee80211_chswitch_done);
1007
1008 static void ieee80211_chswitch_timer(unsigned long data)
1009 {
1010         struct ieee80211_sub_if_data *sdata =
1011                 (struct ieee80211_sub_if_data *) data;
1012
1013         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1014 }
1015
1016 static void
1017 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1018                                  u64 timestamp, struct ieee802_11_elems *elems,
1019                                  bool beacon)
1020 {
1021         struct ieee80211_local *local = sdata->local;
1022         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1023         struct cfg80211_bss *cbss = ifmgd->associated;
1024         struct ieee80211_chanctx *chanctx;
1025         enum ieee80211_band current_band;
1026         struct ieee80211_csa_ie csa_ie;
1027         int res;
1028
1029         sdata_assert_lock(sdata);
1030
1031         if (!cbss)
1032                 return;
1033
1034         if (local->scanning)
1035                 return;
1036
1037         /* disregard subsequent announcements if we are already processing */
1038         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1039                 return;
1040
1041         current_band = cbss->channel->band;
1042         memset(&csa_ie, 0, sizeof(csa_ie));
1043         res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1044                                            ifmgd->flags,
1045                                            ifmgd->associated->bssid, &csa_ie);
1046         if (res < 0)
1047                 ieee80211_queue_work(&local->hw,
1048                                      &ifmgd->csa_connection_drop_work);
1049         if (res)
1050                 return;
1051
1052         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1053                                      IEEE80211_CHAN_DISABLED)) {
1054                 sdata_info(sdata,
1055                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1056                            ifmgd->associated->bssid,
1057                            csa_ie.chandef.chan->center_freq,
1058                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1059                            csa_ie.chandef.center_freq2);
1060                 ieee80211_queue_work(&local->hw,
1061                                      &ifmgd->csa_connection_drop_work);
1062                 return;
1063         }
1064
1065         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1066
1067         mutex_lock(&local->chanctx_mtx);
1068         if (local->use_chanctx) {
1069                 u32 num_chanctx = 0;
1070                 list_for_each_entry(chanctx, &local->chanctx_list, list)
1071                        num_chanctx++;
1072
1073                 if (num_chanctx > 1 ||
1074                     !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1075                         sdata_info(sdata,
1076                                    "not handling chan-switch with channel contexts\n");
1077                         ieee80211_queue_work(&local->hw,
1078                                              &ifmgd->csa_connection_drop_work);
1079                         mutex_unlock(&local->chanctx_mtx);
1080                         return;
1081                 }
1082         }
1083
1084         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1085                 ieee80211_queue_work(&local->hw,
1086                                      &ifmgd->csa_connection_drop_work);
1087                 mutex_unlock(&local->chanctx_mtx);
1088                 return;
1089         }
1090         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1091                                struct ieee80211_chanctx, conf);
1092         if (chanctx->refcount > 1) {
1093                 sdata_info(sdata,
1094                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1095                 ieee80211_queue_work(&local->hw,
1096                                      &ifmgd->csa_connection_drop_work);
1097                 mutex_unlock(&local->chanctx_mtx);
1098                 return;
1099         }
1100         mutex_unlock(&local->chanctx_mtx);
1101
1102         sdata->csa_chandef = csa_ie.chandef;
1103         sdata->vif.csa_active = true;
1104
1105         if (csa_ie.mode)
1106                 ieee80211_stop_queues_by_reason(&local->hw,
1107                                 IEEE80211_MAX_QUEUE_MAP,
1108                                 IEEE80211_QUEUE_STOP_REASON_CSA);
1109
1110         if (local->ops->channel_switch) {
1111                 /* use driver's channel switch callback */
1112                 struct ieee80211_channel_switch ch_switch = {
1113                         .timestamp = timestamp,
1114                         .block_tx = csa_ie.mode,
1115                         .chandef = csa_ie.chandef,
1116                         .count = csa_ie.count,
1117                 };
1118
1119                 drv_channel_switch(local, &ch_switch);
1120                 return;
1121         }
1122
1123         /* channel switch handled in software */
1124         if (csa_ie.count <= 1)
1125                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1126         else
1127                 mod_timer(&ifmgd->chswitch_timer,
1128                           TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1129 }
1130
1131 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1132                                        struct ieee80211_channel *channel,
1133                                        const u8 *country_ie, u8 country_ie_len,
1134                                        const u8 *pwr_constr_elem)
1135 {
1136         struct ieee80211_country_ie_triplet *triplet;
1137         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1138         int i, chan_pwr, chan_increment, new_ap_level;
1139         bool have_chan_pwr = false;
1140
1141         /* Invalid IE */
1142         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1143                 return 0;
1144
1145         triplet = (void *)(country_ie + 3);
1146         country_ie_len -= 3;
1147
1148         switch (channel->band) {
1149         default:
1150                 WARN_ON_ONCE(1);
1151                 /* fall through */
1152         case IEEE80211_BAND_2GHZ:
1153         case IEEE80211_BAND_60GHZ:
1154                 chan_increment = 1;
1155                 break;
1156         case IEEE80211_BAND_5GHZ:
1157                 chan_increment = 4;
1158                 break;
1159         }
1160
1161         /* find channel */
1162         while (country_ie_len >= 3) {
1163                 u8 first_channel = triplet->chans.first_channel;
1164
1165                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1166                         goto next;
1167
1168                 for (i = 0; i < triplet->chans.num_channels; i++) {
1169                         if (first_channel + i * chan_increment == chan) {
1170                                 have_chan_pwr = true;
1171                                 chan_pwr = triplet->chans.max_power;
1172                                 break;
1173                         }
1174                 }
1175                 if (have_chan_pwr)
1176                         break;
1177
1178  next:
1179                 triplet++;
1180                 country_ie_len -= 3;
1181         }
1182
1183         if (!have_chan_pwr)
1184                 return 0;
1185
1186         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1187
1188         if (sdata->ap_power_level == new_ap_level)
1189                 return 0;
1190
1191         sdata_info(sdata,
1192                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1193                    new_ap_level, chan_pwr, *pwr_constr_elem,
1194                    sdata->u.mgd.bssid);
1195         sdata->ap_power_level = new_ap_level;
1196         if (__ieee80211_recalc_txpower(sdata))
1197                 return BSS_CHANGED_TXPOWER;
1198         return 0;
1199 }
1200
1201 /* powersave */
1202 static void ieee80211_enable_ps(struct ieee80211_local *local,
1203                                 struct ieee80211_sub_if_data *sdata)
1204 {
1205         struct ieee80211_conf *conf = &local->hw.conf;
1206
1207         /*
1208          * If we are scanning right now then the parameters will
1209          * take effect when scan finishes.
1210          */
1211         if (local->scanning)
1212                 return;
1213
1214         if (conf->dynamic_ps_timeout > 0 &&
1215             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1216                 mod_timer(&local->dynamic_ps_timer, jiffies +
1217                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1218         } else {
1219                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1220                         ieee80211_send_nullfunc(local, sdata, 1);
1221
1222                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1223                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1224                         return;
1225
1226                 conf->flags |= IEEE80211_CONF_PS;
1227                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1228         }
1229 }
1230
1231 static void ieee80211_change_ps(struct ieee80211_local *local)
1232 {
1233         struct ieee80211_conf *conf = &local->hw.conf;
1234
1235         if (local->ps_sdata) {
1236                 ieee80211_enable_ps(local, local->ps_sdata);
1237         } else if (conf->flags & IEEE80211_CONF_PS) {
1238                 conf->flags &= ~IEEE80211_CONF_PS;
1239                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1240                 del_timer_sync(&local->dynamic_ps_timer);
1241                 cancel_work_sync(&local->dynamic_ps_enable_work);
1242         }
1243 }
1244
1245 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1246 {
1247         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1248         struct sta_info *sta = NULL;
1249         bool authorized = false;
1250
1251         if (!mgd->powersave)
1252                 return false;
1253
1254         if (mgd->broken_ap)
1255                 return false;
1256
1257         if (!mgd->associated)
1258                 return false;
1259
1260         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1261                 return false;
1262
1263         if (!mgd->have_beacon)
1264                 return false;
1265
1266         rcu_read_lock();
1267         sta = sta_info_get(sdata, mgd->bssid);
1268         if (sta)
1269                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1270         rcu_read_unlock();
1271
1272         return authorized;
1273 }
1274
1275 /* need to hold RTNL or interface lock */
1276 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1277 {
1278         struct ieee80211_sub_if_data *sdata, *found = NULL;
1279         int count = 0;
1280         int timeout;
1281
1282         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1283                 local->ps_sdata = NULL;
1284                 return;
1285         }
1286
1287         list_for_each_entry(sdata, &local->interfaces, list) {
1288                 if (!ieee80211_sdata_running(sdata))
1289                         continue;
1290                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1291                         /* If an AP vif is found, then disable PS
1292                          * by setting the count to zero thereby setting
1293                          * ps_sdata to NULL.
1294                          */
1295                         count = 0;
1296                         break;
1297                 }
1298                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1299                         continue;
1300                 found = sdata;
1301                 count++;
1302         }
1303
1304         if (count == 1 && ieee80211_powersave_allowed(found)) {
1305                 s32 beaconint_us;
1306
1307                 if (latency < 0)
1308                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1309
1310                 beaconint_us = ieee80211_tu_to_usec(
1311                                         found->vif.bss_conf.beacon_int);
1312
1313                 timeout = local->dynamic_ps_forced_timeout;
1314                 if (timeout < 0) {
1315                         /*
1316                          * Go to full PSM if the user configures a very low
1317                          * latency requirement.
1318                          * The 2000 second value is there for compatibility
1319                          * until the PM_QOS_NETWORK_LATENCY is configured
1320                          * with real values.
1321                          */
1322                         if (latency > (1900 * USEC_PER_MSEC) &&
1323                             latency != (2000 * USEC_PER_SEC))
1324                                 timeout = 0;
1325                         else
1326                                 timeout = 100;
1327                 }
1328                 local->hw.conf.dynamic_ps_timeout = timeout;
1329
1330                 if (beaconint_us > latency) {
1331                         local->ps_sdata = NULL;
1332                 } else {
1333                         int maxslp = 1;
1334                         u8 dtimper = found->u.mgd.dtim_period;
1335
1336                         /* If the TIM IE is invalid, pretend the value is 1 */
1337                         if (!dtimper)
1338                                 dtimper = 1;
1339                         else if (dtimper > 1)
1340                                 maxslp = min_t(int, dtimper,
1341                                                     latency / beaconint_us);
1342
1343                         local->hw.conf.max_sleep_period = maxslp;
1344                         local->hw.conf.ps_dtim_period = dtimper;
1345                         local->ps_sdata = found;
1346                 }
1347         } else {
1348                 local->ps_sdata = NULL;
1349         }
1350
1351         ieee80211_change_ps(local);
1352 }
1353
1354 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1355 {
1356         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1357
1358         if (sdata->vif.bss_conf.ps != ps_allowed) {
1359                 sdata->vif.bss_conf.ps = ps_allowed;
1360                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1361         }
1362 }
1363
1364 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1365 {
1366         struct ieee80211_local *local =
1367                 container_of(work, struct ieee80211_local,
1368                              dynamic_ps_disable_work);
1369
1370         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1371                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1372                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1373         }
1374
1375         ieee80211_wake_queues_by_reason(&local->hw,
1376                                         IEEE80211_MAX_QUEUE_MAP,
1377                                         IEEE80211_QUEUE_STOP_REASON_PS);
1378 }
1379
1380 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1381 {
1382         struct ieee80211_local *local =
1383                 container_of(work, struct ieee80211_local,
1384                              dynamic_ps_enable_work);
1385         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1386         struct ieee80211_if_managed *ifmgd;
1387         unsigned long flags;
1388         int q;
1389
1390         /* can only happen when PS was just disabled anyway */
1391         if (!sdata)
1392                 return;
1393
1394         ifmgd = &sdata->u.mgd;
1395
1396         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1397                 return;
1398
1399         if (local->hw.conf.dynamic_ps_timeout > 0) {
1400                 /* don't enter PS if TX frames are pending */
1401                 if (drv_tx_frames_pending(local)) {
1402                         mod_timer(&local->dynamic_ps_timer, jiffies +
1403                                   msecs_to_jiffies(
1404                                   local->hw.conf.dynamic_ps_timeout));
1405                         return;
1406                 }
1407
1408                 /*
1409                  * transmission can be stopped by others which leads to
1410                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1411                  * is not the actual idle state.
1412                  */
1413                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1414                 for (q = 0; q < local->hw.queues; q++) {
1415                         if (local->queue_stop_reasons[q]) {
1416                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1417                                                        flags);
1418                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1419                                           msecs_to_jiffies(
1420                                           local->hw.conf.dynamic_ps_timeout));
1421                                 return;
1422                         }
1423                 }
1424                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1425         }
1426
1427         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1428             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1429                 if (drv_tx_frames_pending(local)) {
1430                         mod_timer(&local->dynamic_ps_timer, jiffies +
1431                                   msecs_to_jiffies(
1432                                   local->hw.conf.dynamic_ps_timeout));
1433                 } else {
1434                         ieee80211_send_nullfunc(local, sdata, 1);
1435                         /* Flush to get the tx status of nullfunc frame */
1436                         ieee80211_flush_queues(local, sdata);
1437                 }
1438         }
1439
1440         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1441               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1442             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1443                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1444                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1445                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1446         }
1447 }
1448
1449 void ieee80211_dynamic_ps_timer(unsigned long data)
1450 {
1451         struct ieee80211_local *local = (void *) data;
1452
1453         if (local->quiescing || local->suspended)
1454                 return;
1455
1456         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1457 }
1458
1459 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1460 {
1461         struct delayed_work *delayed_work =
1462                 container_of(work, struct delayed_work, work);
1463         struct ieee80211_sub_if_data *sdata =
1464                 container_of(delayed_work, struct ieee80211_sub_if_data,
1465                              dfs_cac_timer_work);
1466         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1467
1468         mutex_lock(&sdata->local->mtx);
1469         if (sdata->wdev.cac_started) {
1470                 ieee80211_vif_release_channel(sdata);
1471                 cfg80211_cac_event(sdata->dev, &chandef,
1472                                    NL80211_RADAR_CAC_FINISHED,
1473                                    GFP_KERNEL);
1474         }
1475         mutex_unlock(&sdata->local->mtx);
1476 }
1477
1478 /* MLME */
1479 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1480                                      struct ieee80211_sub_if_data *sdata,
1481                                      const u8 *wmm_param, size_t wmm_param_len)
1482 {
1483         struct ieee80211_tx_queue_params params;
1484         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1485         size_t left;
1486         int count;
1487         const u8 *pos;
1488         u8 uapsd_queues = 0;
1489
1490         if (!local->ops->conf_tx)
1491                 return false;
1492
1493         if (local->hw.queues < IEEE80211_NUM_ACS)
1494                 return false;
1495
1496         if (!wmm_param)
1497                 return false;
1498
1499         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1500                 return false;
1501
1502         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1503                 uapsd_queues = ifmgd->uapsd_queues;
1504
1505         count = wmm_param[6] & 0x0f;
1506         if (count == ifmgd->wmm_last_param_set)
1507                 return false;
1508         ifmgd->wmm_last_param_set = count;
1509
1510         pos = wmm_param + 8;
1511         left = wmm_param_len - 8;
1512
1513         memset(&params, 0, sizeof(params));
1514
1515         sdata->wmm_acm = 0;
1516         for (; left >= 4; left -= 4, pos += 4) {
1517                 int aci = (pos[0] >> 5) & 0x03;
1518                 int acm = (pos[0] >> 4) & 0x01;
1519                 bool uapsd = false;
1520                 int queue;
1521
1522                 switch (aci) {
1523                 case 1: /* AC_BK */
1524                         queue = 3;
1525                         if (acm)
1526                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1527                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1528                                 uapsd = true;
1529                         break;
1530                 case 2: /* AC_VI */
1531                         queue = 1;
1532                         if (acm)
1533                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1534                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1535                                 uapsd = true;
1536                         break;
1537                 case 3: /* AC_VO */
1538                         queue = 0;
1539                         if (acm)
1540                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1541                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1542                                 uapsd = true;
1543                         break;
1544                 case 0: /* AC_BE */
1545                 default:
1546                         queue = 2;
1547                         if (acm)
1548                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1549                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1550                                 uapsd = true;
1551                         break;
1552                 }
1553
1554                 params.aifs = pos[0] & 0x0f;
1555                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1556                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1557                 params.txop = get_unaligned_le16(pos + 2);
1558                 params.acm = acm;
1559                 params.uapsd = uapsd;
1560
1561                 mlme_dbg(sdata,
1562                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1563                          queue, aci, acm,
1564                          params.aifs, params.cw_min, params.cw_max,
1565                          params.txop, params.uapsd);
1566                 sdata->tx_conf[queue] = params;
1567                 if (drv_conf_tx(local, sdata, queue, &params))
1568                         sdata_err(sdata,
1569                                   "failed to set TX queue parameters for queue %d\n",
1570                                   queue);
1571         }
1572
1573         /* enable WMM or activate new settings */
1574         sdata->vif.bss_conf.qos = true;
1575         return true;
1576 }
1577
1578 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1579 {
1580         lockdep_assert_held(&sdata->local->mtx);
1581
1582         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1583         ieee80211_run_deferred_scan(sdata->local);
1584 }
1585
1586 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1587 {
1588         mutex_lock(&sdata->local->mtx);
1589         __ieee80211_stop_poll(sdata);
1590         mutex_unlock(&sdata->local->mtx);
1591 }
1592
1593 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1594                                            u16 capab, bool erp_valid, u8 erp)
1595 {
1596         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1597         u32 changed = 0;
1598         bool use_protection;
1599         bool use_short_preamble;
1600         bool use_short_slot;
1601
1602         if (erp_valid) {
1603                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1604                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1605         } else {
1606                 use_protection = false;
1607                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1608         }
1609
1610         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1611         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1612                 use_short_slot = true;
1613
1614         if (use_protection != bss_conf->use_cts_prot) {
1615                 bss_conf->use_cts_prot = use_protection;
1616                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1617         }
1618
1619         if (use_short_preamble != bss_conf->use_short_preamble) {
1620                 bss_conf->use_short_preamble = use_short_preamble;
1621                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1622         }
1623
1624         if (use_short_slot != bss_conf->use_short_slot) {
1625                 bss_conf->use_short_slot = use_short_slot;
1626                 changed |= BSS_CHANGED_ERP_SLOT;
1627         }
1628
1629         return changed;
1630 }
1631
1632 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1633                                      struct cfg80211_bss *cbss,
1634                                      u32 bss_info_changed)
1635 {
1636         struct ieee80211_bss *bss = (void *)cbss->priv;
1637         struct ieee80211_local *local = sdata->local;
1638         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1639
1640         bss_info_changed |= BSS_CHANGED_ASSOC;
1641         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1642                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1643
1644         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1645                 beacon_loss_count * bss_conf->beacon_int));
1646
1647         sdata->u.mgd.associated = cbss;
1648         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1649
1650         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1651
1652         if (sdata->vif.p2p) {
1653                 const struct cfg80211_bss_ies *ies;
1654
1655                 rcu_read_lock();
1656                 ies = rcu_dereference(cbss->ies);
1657                 if (ies) {
1658                         int ret;
1659
1660                         ret = cfg80211_get_p2p_attr(
1661                                         ies->data, ies->len,
1662                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1663                                         (u8 *) &bss_conf->p2p_noa_attr,
1664                                         sizeof(bss_conf->p2p_noa_attr));
1665                         if (ret >= 2) {
1666                                 sdata->u.mgd.p2p_noa_index =
1667                                         bss_conf->p2p_noa_attr.index;
1668                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1669                         }
1670                 }
1671                 rcu_read_unlock();
1672         }
1673
1674         /* just to be sure */
1675         ieee80211_stop_poll(sdata);
1676
1677         ieee80211_led_assoc(local, 1);
1678
1679         if (sdata->u.mgd.have_beacon) {
1680                 /*
1681                  * If the AP is buggy we may get here with no DTIM period
1682                  * known, so assume it's 1 which is the only safe assumption
1683                  * in that case, although if the TIM IE is broken powersave
1684                  * probably just won't work at all.
1685                  */
1686                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1687                 bss_conf->beacon_rate = bss->beacon_rate;
1688                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1689         } else {
1690                 bss_conf->beacon_rate = NULL;
1691                 bss_conf->dtim_period = 0;
1692         }
1693
1694         bss_conf->assoc = 1;
1695
1696         /* Tell the driver to monitor connection quality (if supported) */
1697         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1698             bss_conf->cqm_rssi_thold)
1699                 bss_info_changed |= BSS_CHANGED_CQM;
1700
1701         /* Enable ARP filtering */
1702         if (bss_conf->arp_addr_cnt)
1703                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1704
1705         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1706
1707         mutex_lock(&local->iflist_mtx);
1708         ieee80211_recalc_ps(local, -1);
1709         mutex_unlock(&local->iflist_mtx);
1710
1711         ieee80211_recalc_smps(sdata);
1712         ieee80211_recalc_ps_vif(sdata);
1713
1714         netif_carrier_on(sdata->dev);
1715 }
1716
1717 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1718                                    u16 stype, u16 reason, bool tx,
1719                                    u8 *frame_buf)
1720 {
1721         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1722         struct ieee80211_local *local = sdata->local;
1723         u32 changed = 0;
1724
1725         sdata_assert_lock(sdata);
1726
1727         if (WARN_ON_ONCE(tx && !frame_buf))
1728                 return;
1729
1730         if (WARN_ON(!ifmgd->associated))
1731                 return;
1732
1733         ieee80211_stop_poll(sdata);
1734
1735         ifmgd->associated = NULL;
1736         netif_carrier_off(sdata->dev);
1737
1738         /*
1739          * if we want to get out of ps before disassoc (why?) we have
1740          * to do it before sending disassoc, as otherwise the null-packet
1741          * won't be valid.
1742          */
1743         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1744                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1745                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1746         }
1747         local->ps_sdata = NULL;
1748
1749         /* disable per-vif ps */
1750         ieee80211_recalc_ps_vif(sdata);
1751
1752         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1753         if (tx)
1754                 ieee80211_flush_queues(local, sdata);
1755
1756         /* deauthenticate/disassociate now */
1757         if (tx || frame_buf)
1758                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1759                                                reason, tx, frame_buf);
1760
1761         /* flush out frame */
1762         if (tx)
1763                 ieee80211_flush_queues(local, sdata);
1764
1765         /* clear bssid only after building the needed mgmt frames */
1766         memset(ifmgd->bssid, 0, ETH_ALEN);
1767
1768         /* remove AP and TDLS peers */
1769         sta_info_flush(sdata);
1770
1771         /* finally reset all BSS / config parameters */
1772         changed |= ieee80211_reset_erp_info(sdata);
1773
1774         ieee80211_led_assoc(local, 0);
1775         changed |= BSS_CHANGED_ASSOC;
1776         sdata->vif.bss_conf.assoc = false;
1777
1778         ifmgd->p2p_noa_index = -1;
1779         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1780                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1781
1782         /* on the next assoc, re-program HT/VHT parameters */
1783         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1784         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1785         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1786         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1787
1788         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1789
1790         del_timer_sync(&local->dynamic_ps_timer);
1791         cancel_work_sync(&local->dynamic_ps_enable_work);
1792
1793         /* Disable ARP filtering */
1794         if (sdata->vif.bss_conf.arp_addr_cnt)
1795                 changed |= BSS_CHANGED_ARP_FILTER;
1796
1797         sdata->vif.bss_conf.qos = false;
1798         changed |= BSS_CHANGED_QOS;
1799
1800         /* The BSSID (not really interesting) and HT changed */
1801         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1802         ieee80211_bss_info_change_notify(sdata, changed);
1803
1804         /* disassociated - set to defaults now */
1805         ieee80211_set_wmm_default(sdata, false);
1806
1807         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1808         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1809         del_timer_sync(&sdata->u.mgd.timer);
1810         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1811
1812         sdata->vif.bss_conf.dtim_period = 0;
1813         sdata->vif.bss_conf.beacon_rate = NULL;
1814
1815         ifmgd->have_beacon = false;
1816
1817         ifmgd->flags = 0;
1818         mutex_lock(&local->mtx);
1819         ieee80211_vif_release_channel(sdata);
1820         mutex_unlock(&local->mtx);
1821
1822         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1823 }
1824
1825 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1826                              struct ieee80211_hdr *hdr)
1827 {
1828         /*
1829          * We can postpone the mgd.timer whenever receiving unicast frames
1830          * from AP because we know that the connection is working both ways
1831          * at that time. But multicast frames (and hence also beacons) must
1832          * be ignored here, because we need to trigger the timer during
1833          * data idle periods for sending the periodic probe request to the
1834          * AP we're connected to.
1835          */
1836         if (is_multicast_ether_addr(hdr->addr1))
1837                 return;
1838
1839         ieee80211_sta_reset_conn_monitor(sdata);
1840 }
1841
1842 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1843 {
1844         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1845         struct ieee80211_local *local = sdata->local;
1846
1847         mutex_lock(&local->mtx);
1848         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1849                 goto out;
1850
1851         __ieee80211_stop_poll(sdata);
1852
1853         mutex_lock(&local->iflist_mtx);
1854         ieee80211_recalc_ps(local, -1);
1855         mutex_unlock(&local->iflist_mtx);
1856
1857         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1858                 goto out;
1859
1860         /*
1861          * We've received a probe response, but are not sure whether
1862          * we have or will be receiving any beacons or data, so let's
1863          * schedule the timers again, just in case.
1864          */
1865         ieee80211_sta_reset_beacon_monitor(sdata);
1866
1867         mod_timer(&ifmgd->conn_mon_timer,
1868                   round_jiffies_up(jiffies +
1869                                    IEEE80211_CONNECTION_IDLE_TIME));
1870 out:
1871         mutex_unlock(&local->mtx);
1872 }
1873
1874 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1875                              struct ieee80211_hdr *hdr, bool ack)
1876 {
1877         if (!ieee80211_is_data(hdr->frame_control))
1878             return;
1879
1880         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1881             sdata->u.mgd.probe_send_count > 0) {
1882                 if (ack)
1883                         ieee80211_sta_reset_conn_monitor(sdata);
1884                 else
1885                         sdata->u.mgd.nullfunc_failed = true;
1886                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1887                 return;
1888         }
1889
1890         if (ack)
1891                 ieee80211_sta_reset_conn_monitor(sdata);
1892 }
1893
1894 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1895 {
1896         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1897         const u8 *ssid;
1898         u8 *dst = ifmgd->associated->bssid;
1899         u8 unicast_limit = max(1, max_probe_tries - 3);
1900
1901         /*
1902          * Try sending broadcast probe requests for the last three
1903          * probe requests after the first ones failed since some
1904          * buggy APs only support broadcast probe requests.
1905          */
1906         if (ifmgd->probe_send_count >= unicast_limit)
1907                 dst = NULL;
1908
1909         /*
1910          * When the hardware reports an accurate Tx ACK status, it's
1911          * better to send a nullfunc frame instead of a probe request,
1912          * as it will kick us off the AP quickly if we aren't associated
1913          * anymore. The timeout will be reset if the frame is ACKed by
1914          * the AP.
1915          */
1916         ifmgd->probe_send_count++;
1917
1918         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1919                 ifmgd->nullfunc_failed = false;
1920                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1921         } else {
1922                 int ssid_len;
1923
1924                 rcu_read_lock();
1925                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1926                 if (WARN_ON_ONCE(ssid == NULL))
1927                         ssid_len = 0;
1928                 else
1929                         ssid_len = ssid[1];
1930
1931                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1932                                          0, (u32) -1, true, 0,
1933                                          ifmgd->associated->channel, false);
1934                 rcu_read_unlock();
1935         }
1936
1937         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1938         run_again(sdata, ifmgd->probe_timeout);
1939         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1940                 ieee80211_flush_queues(sdata->local, sdata);
1941 }
1942
1943 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1944                                    bool beacon)
1945 {
1946         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1947         bool already = false;
1948
1949         if (!ieee80211_sdata_running(sdata))
1950                 return;
1951
1952         sdata_lock(sdata);
1953
1954         if (!ifmgd->associated)
1955                 goto out;
1956
1957         mutex_lock(&sdata->local->mtx);
1958
1959         if (sdata->local->tmp_channel || sdata->local->scanning) {
1960                 mutex_unlock(&sdata->local->mtx);
1961                 goto out;
1962         }
1963
1964         if (beacon) {
1965                 mlme_dbg_ratelimited(sdata,
1966                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
1967                                      beacon_loss_count);
1968
1969                 ieee80211_cqm_rssi_notify(&sdata->vif,
1970                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1971                                           GFP_KERNEL);
1972         }
1973
1974         /*
1975          * The driver/our work has already reported this event or the
1976          * connection monitoring has kicked in and we have already sent
1977          * a probe request. Or maybe the AP died and the driver keeps
1978          * reporting until we disassociate...
1979          *
1980          * In either case we have to ignore the current call to this
1981          * function (except for setting the correct probe reason bit)
1982          * because otherwise we would reset the timer every time and
1983          * never check whether we received a probe response!
1984          */
1985         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1986                 already = true;
1987
1988         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1989
1990         mutex_unlock(&sdata->local->mtx);
1991
1992         if (already)
1993                 goto out;
1994
1995         mutex_lock(&sdata->local->iflist_mtx);
1996         ieee80211_recalc_ps(sdata->local, -1);
1997         mutex_unlock(&sdata->local->iflist_mtx);
1998
1999         ifmgd->probe_send_count = 0;
2000         ieee80211_mgd_probe_ap_send(sdata);
2001  out:
2002         sdata_unlock(sdata);
2003 }
2004
2005 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2006                                           struct ieee80211_vif *vif)
2007 {
2008         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2009         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2010         struct cfg80211_bss *cbss;
2011         struct sk_buff *skb;
2012         const u8 *ssid;
2013         int ssid_len;
2014
2015         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2016                 return NULL;
2017
2018         sdata_assert_lock(sdata);
2019
2020         if (ifmgd->associated)
2021                 cbss = ifmgd->associated;
2022         else if (ifmgd->auth_data)
2023                 cbss = ifmgd->auth_data->bss;
2024         else if (ifmgd->assoc_data)
2025                 cbss = ifmgd->assoc_data->bss;
2026         else
2027                 return NULL;
2028
2029         rcu_read_lock();
2030         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2031         if (WARN_ON_ONCE(ssid == NULL))
2032                 ssid_len = 0;
2033         else
2034                 ssid_len = ssid[1];
2035
2036         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2037                                         (u32) -1, cbss->channel,
2038                                         ssid + 2, ssid_len,
2039                                         NULL, 0, true);
2040         rcu_read_unlock();
2041
2042         return skb;
2043 }
2044 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2045
2046 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2047 {
2048         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2049         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2050
2051         sdata_lock(sdata);
2052         if (!ifmgd->associated) {
2053                 sdata_unlock(sdata);
2054                 return;
2055         }
2056
2057         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2058                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2059                                true, frame_buf);
2060         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2061         sdata->vif.csa_active = false;
2062         ieee80211_wake_queues_by_reason(&sdata->local->hw,
2063                                         IEEE80211_MAX_QUEUE_MAP,
2064                                         IEEE80211_QUEUE_STOP_REASON_CSA);
2065
2066         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2067                               IEEE80211_DEAUTH_FRAME_LEN);
2068         sdata_unlock(sdata);
2069 }
2070
2071 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2072 {
2073         struct ieee80211_sub_if_data *sdata =
2074                 container_of(work, struct ieee80211_sub_if_data,
2075                              u.mgd.beacon_connection_loss_work);
2076         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2077         struct sta_info *sta;
2078
2079         if (ifmgd->associated) {
2080                 rcu_read_lock();
2081                 sta = sta_info_get(sdata, ifmgd->bssid);
2082                 if (sta)
2083                         sta->beacon_loss_count++;
2084                 rcu_read_unlock();
2085         }
2086
2087         if (ifmgd->connection_loss) {
2088                 sdata_info(sdata, "Connection to AP %pM lost\n",
2089                            ifmgd->bssid);
2090                 __ieee80211_disconnect(sdata);
2091         } else {
2092                 ieee80211_mgd_probe_ap(sdata, true);
2093         }
2094 }
2095
2096 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2097 {
2098         struct ieee80211_sub_if_data *sdata =
2099                 container_of(work, struct ieee80211_sub_if_data,
2100                              u.mgd.csa_connection_drop_work);
2101
2102         __ieee80211_disconnect(sdata);
2103 }
2104
2105 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2106 {
2107         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2108         struct ieee80211_hw *hw = &sdata->local->hw;
2109
2110         trace_api_beacon_loss(sdata);
2111
2112         sdata->u.mgd.connection_loss = false;
2113         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2114 }
2115 EXPORT_SYMBOL(ieee80211_beacon_loss);
2116
2117 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2118 {
2119         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2120         struct ieee80211_hw *hw = &sdata->local->hw;
2121
2122         trace_api_connection_loss(sdata);
2123
2124         sdata->u.mgd.connection_loss = true;
2125         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2126 }
2127 EXPORT_SYMBOL(ieee80211_connection_loss);
2128
2129
2130 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2131                                         bool assoc)
2132 {
2133         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2134
2135         sdata_assert_lock(sdata);
2136
2137         if (!assoc) {
2138                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2139
2140                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2141                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2142                 sdata->u.mgd.flags = 0;
2143                 mutex_lock(&sdata->local->mtx);
2144                 ieee80211_vif_release_channel(sdata);
2145                 mutex_unlock(&sdata->local->mtx);
2146         }
2147
2148         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2149         kfree(auth_data);
2150         sdata->u.mgd.auth_data = NULL;
2151 }
2152
2153 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2154                                      struct ieee80211_mgmt *mgmt, size_t len)
2155 {
2156         struct ieee80211_local *local = sdata->local;
2157         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2158         u8 *pos;
2159         struct ieee802_11_elems elems;
2160         u32 tx_flags = 0;
2161
2162         pos = mgmt->u.auth.variable;
2163         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2164         if (!elems.challenge)
2165                 return;
2166         auth_data->expected_transaction = 4;
2167         drv_mgd_prepare_tx(sdata->local, sdata);
2168         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2169                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2170                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2171         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2172                             elems.challenge - 2, elems.challenge_len + 2,
2173                             auth_data->bss->bssid, auth_data->bss->bssid,
2174                             auth_data->key, auth_data->key_len,
2175                             auth_data->key_idx, tx_flags);
2176 }
2177
2178 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2179                                    struct ieee80211_mgmt *mgmt, size_t len)
2180 {
2181         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2182         u8 bssid[ETH_ALEN];
2183         u16 auth_alg, auth_transaction, status_code;
2184         struct sta_info *sta;
2185
2186         sdata_assert_lock(sdata);
2187
2188         if (len < 24 + 6)
2189                 return;
2190
2191         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2192                 return;
2193
2194         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2195
2196         if (!ether_addr_equal(bssid, mgmt->bssid))
2197                 return;
2198
2199         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2200         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2201         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2202
2203         if (auth_alg != ifmgd->auth_data->algorithm ||
2204             auth_transaction != ifmgd->auth_data->expected_transaction) {
2205                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2206                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2207                            auth_transaction,
2208                            ifmgd->auth_data->expected_transaction);
2209                 return;
2210         }
2211
2212         if (status_code != WLAN_STATUS_SUCCESS) {
2213                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2214                            mgmt->sa, status_code);
2215                 ieee80211_destroy_auth_data(sdata, false);
2216                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2217                 return;
2218         }
2219
2220         switch (ifmgd->auth_data->algorithm) {
2221         case WLAN_AUTH_OPEN:
2222         case WLAN_AUTH_LEAP:
2223         case WLAN_AUTH_FT:
2224         case WLAN_AUTH_SAE:
2225                 break;
2226         case WLAN_AUTH_SHARED_KEY:
2227                 if (ifmgd->auth_data->expected_transaction != 4) {
2228                         ieee80211_auth_challenge(sdata, mgmt, len);
2229                         /* need another frame */
2230                         return;
2231                 }
2232                 break;
2233         default:
2234                 WARN_ONCE(1, "invalid auth alg %d",
2235                           ifmgd->auth_data->algorithm);
2236                 return;
2237         }
2238
2239         sdata_info(sdata, "authenticated\n");
2240         ifmgd->auth_data->done = true;
2241         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2242         ifmgd->auth_data->timeout_started = true;
2243         run_again(sdata, ifmgd->auth_data->timeout);
2244
2245         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2246             ifmgd->auth_data->expected_transaction != 2) {
2247                 /*
2248                  * Report auth frame to user space for processing since another
2249                  * round of Authentication frames is still needed.
2250                  */
2251                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2252                 return;
2253         }
2254
2255         /* move station state to auth */
2256         mutex_lock(&sdata->local->sta_mtx);
2257         sta = sta_info_get(sdata, bssid);
2258         if (!sta) {
2259                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2260                 goto out_err;
2261         }
2262         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2263                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2264                 goto out_err;
2265         }
2266         mutex_unlock(&sdata->local->sta_mtx);
2267
2268         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2269         return;
2270  out_err:
2271         mutex_unlock(&sdata->local->sta_mtx);
2272         /* ignore frame -- wait for timeout */
2273 }
2274
2275 #define case_WLAN(type) \
2276         case WLAN_REASON_##type: return #type
2277
2278 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2279 {
2280         switch (reason_code) {
2281         case_WLAN(UNSPECIFIED);
2282         case_WLAN(PREV_AUTH_NOT_VALID);
2283         case_WLAN(DEAUTH_LEAVING);
2284         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2285         case_WLAN(DISASSOC_AP_BUSY);
2286         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2287         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2288         case_WLAN(DISASSOC_STA_HAS_LEFT);
2289         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2290         case_WLAN(DISASSOC_BAD_POWER);
2291         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2292         case_WLAN(INVALID_IE);
2293         case_WLAN(MIC_FAILURE);
2294         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2295         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2296         case_WLAN(IE_DIFFERENT);
2297         case_WLAN(INVALID_GROUP_CIPHER);
2298         case_WLAN(INVALID_PAIRWISE_CIPHER);
2299         case_WLAN(INVALID_AKMP);
2300         case_WLAN(UNSUPP_RSN_VERSION);
2301         case_WLAN(INVALID_RSN_IE_CAP);
2302         case_WLAN(IEEE8021X_FAILED);
2303         case_WLAN(CIPHER_SUITE_REJECTED);
2304         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2305         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2306         case_WLAN(DISASSOC_LOW_ACK);
2307         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2308         case_WLAN(QSTA_LEAVE_QBSS);
2309         case_WLAN(QSTA_NOT_USE);
2310         case_WLAN(QSTA_REQUIRE_SETUP);
2311         case_WLAN(QSTA_TIMEOUT);
2312         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2313         case_WLAN(MESH_PEER_CANCELED);
2314         case_WLAN(MESH_MAX_PEERS);
2315         case_WLAN(MESH_CONFIG);
2316         case_WLAN(MESH_CLOSE);
2317         case_WLAN(MESH_MAX_RETRIES);
2318         case_WLAN(MESH_CONFIRM_TIMEOUT);
2319         case_WLAN(MESH_INVALID_GTK);
2320         case_WLAN(MESH_INCONSISTENT_PARAM);
2321         case_WLAN(MESH_INVALID_SECURITY);
2322         case_WLAN(MESH_PATH_ERROR);
2323         case_WLAN(MESH_PATH_NOFORWARD);
2324         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2325         case_WLAN(MAC_EXISTS_IN_MBSS);
2326         case_WLAN(MESH_CHAN_REGULATORY);
2327         case_WLAN(MESH_CHAN);
2328         default: return "<unknown>";
2329         }
2330 }
2331
2332 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2333                                      struct ieee80211_mgmt *mgmt, size_t len)
2334 {
2335         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2336         const u8 *bssid = NULL;
2337         u16 reason_code;
2338
2339         sdata_assert_lock(sdata);
2340
2341         if (len < 24 + 2)
2342                 return;
2343
2344         if (!ifmgd->associated ||
2345             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2346                 return;
2347
2348         bssid = ifmgd->associated->bssid;
2349
2350         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2351
2352         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2353                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2354
2355         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2356
2357         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2358 }
2359
2360
2361 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2362                                        struct ieee80211_mgmt *mgmt, size_t len)
2363 {
2364         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2365         u16 reason_code;
2366
2367         sdata_assert_lock(sdata);
2368
2369         if (len < 24 + 2)
2370                 return;
2371
2372         if (!ifmgd->associated ||
2373             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2374                 return;
2375
2376         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2377
2378         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2379                    mgmt->sa, reason_code);
2380
2381         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2382
2383         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2384 }
2385
2386 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2387                                 u8 *supp_rates, unsigned int supp_rates_len,
2388                                 u32 *rates, u32 *basic_rates,
2389                                 bool *have_higher_than_11mbit,
2390                                 int *min_rate, int *min_rate_index,
2391                                 int shift, u32 rate_flags)
2392 {
2393         int i, j;
2394
2395         for (i = 0; i < supp_rates_len; i++) {
2396                 int rate = supp_rates[i] & 0x7f;
2397                 bool is_basic = !!(supp_rates[i] & 0x80);
2398
2399                 if ((rate * 5 * (1 << shift)) > 110)
2400                         *have_higher_than_11mbit = true;
2401
2402                 /*
2403                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2404                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2405                  *
2406                  * Note: Even through the membership selector and the basic
2407                  *       rate flag share the same bit, they are not exactly
2408                  *       the same.
2409                  */
2410                 if (!!(supp_rates[i] & 0x80) &&
2411                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2412                         continue;
2413
2414                 for (j = 0; j < sband->n_bitrates; j++) {
2415                         struct ieee80211_rate *br;
2416                         int brate;
2417
2418                         br = &sband->bitrates[j];
2419                         if ((rate_flags & br->flags) != rate_flags)
2420                                 continue;
2421
2422                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2423                         if (brate == rate) {
2424                                 *rates |= BIT(j);
2425                                 if (is_basic)
2426                                         *basic_rates |= BIT(j);
2427                                 if ((rate * 5) < *min_rate) {
2428                                         *min_rate = rate * 5;
2429                                         *min_rate_index = j;
2430                                 }
2431                                 break;
2432                         }
2433                 }
2434         }
2435 }
2436
2437 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2438                                          bool assoc)
2439 {
2440         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2441
2442         sdata_assert_lock(sdata);
2443
2444         if (!assoc) {
2445                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2446
2447                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2448                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2449                 sdata->u.mgd.flags = 0;
2450                 mutex_lock(&sdata->local->mtx);
2451                 ieee80211_vif_release_channel(sdata);
2452                 mutex_unlock(&sdata->local->mtx);
2453         }
2454
2455         kfree(assoc_data);
2456         sdata->u.mgd.assoc_data = NULL;
2457 }
2458
2459 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2460                                     struct cfg80211_bss *cbss,
2461                                     struct ieee80211_mgmt *mgmt, size_t len)
2462 {
2463         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2464         struct ieee80211_local *local = sdata->local;
2465         struct ieee80211_supported_band *sband;
2466         struct sta_info *sta;
2467         u8 *pos;
2468         u16 capab_info, aid;
2469         struct ieee802_11_elems elems;
2470         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2471         const struct cfg80211_bss_ies *bss_ies = NULL;
2472         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2473         u32 changed = 0;
2474         int err;
2475         bool ret;
2476
2477         /* AssocResp and ReassocResp have identical structure */
2478
2479         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2480         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2481
2482         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2483                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2484                            aid);
2485         aid &= ~(BIT(15) | BIT(14));
2486
2487         ifmgd->broken_ap = false;
2488
2489         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2490                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2491                            aid);
2492                 aid = 0;
2493                 ifmgd->broken_ap = true;
2494         }
2495
2496         pos = mgmt->u.assoc_resp.variable;
2497         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2498
2499         if (!elems.supp_rates) {
2500                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2501                 return false;
2502         }
2503
2504         ifmgd->aid = aid;
2505
2506         /*
2507          * Some APs are erroneously not including some information in their
2508          * (re)association response frames. Try to recover by using the data
2509          * from the beacon or probe response. This seems to afflict mobile
2510          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2511          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2512          */
2513         if ((assoc_data->wmm && !elems.wmm_param) ||
2514             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2515              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2516             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2517              (!elems.vht_cap_elem || !elems.vht_operation))) {
2518                 const struct cfg80211_bss_ies *ies;
2519                 struct ieee802_11_elems bss_elems;
2520
2521                 rcu_read_lock();
2522                 ies = rcu_dereference(cbss->ies);
2523                 if (ies)
2524                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2525                                           GFP_ATOMIC);
2526                 rcu_read_unlock();
2527                 if (!bss_ies)
2528                         return false;
2529
2530                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2531                                        false, &bss_elems);
2532                 if (assoc_data->wmm &&
2533                     !elems.wmm_param && bss_elems.wmm_param) {
2534                         elems.wmm_param = bss_elems.wmm_param;
2535                         sdata_info(sdata,
2536                                    "AP bug: WMM param missing from AssocResp\n");
2537                 }
2538
2539                 /*
2540                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2541                  * have to include the IEs in the (re)association response.
2542                  */
2543                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2544                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2545                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2546                         sdata_info(sdata,
2547                                    "AP bug: HT capability missing from AssocResp\n");
2548                 }
2549                 if (!elems.ht_operation && bss_elems.ht_operation &&
2550                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2551                         elems.ht_operation = bss_elems.ht_operation;
2552                         sdata_info(sdata,
2553                                    "AP bug: HT operation missing from AssocResp\n");
2554                 }
2555                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2556                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2557                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2558                         sdata_info(sdata,
2559                                    "AP bug: VHT capa missing from AssocResp\n");
2560                 }
2561                 if (!elems.vht_operation && bss_elems.vht_operation &&
2562                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2563                         elems.vht_operation = bss_elems.vht_operation;
2564                         sdata_info(sdata,
2565                                    "AP bug: VHT operation missing from AssocResp\n");
2566                 }
2567         }
2568
2569         /*
2570          * We previously checked these in the beacon/probe response, so
2571          * they should be present here. This is just a safety net.
2572          */
2573         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2574             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2575                 sdata_info(sdata,
2576                            "HT AP is missing WMM params or HT capability/operation\n");
2577                 ret = false;
2578                 goto out;
2579         }
2580
2581         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2582             (!elems.vht_cap_elem || !elems.vht_operation)) {
2583                 sdata_info(sdata,
2584                            "VHT AP is missing VHT capability/operation\n");
2585                 ret = false;
2586                 goto out;
2587         }
2588
2589         mutex_lock(&sdata->local->sta_mtx);
2590         /*
2591          * station info was already allocated and inserted before
2592          * the association and should be available to us
2593          */
2594         sta = sta_info_get(sdata, cbss->bssid);
2595         if (WARN_ON(!sta)) {
2596                 mutex_unlock(&sdata->local->sta_mtx);
2597                 ret = false;
2598                 goto out;
2599         }
2600
2601         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2602
2603         /* Set up internal HT/VHT capabilities */
2604         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2605                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2606                                                   elems.ht_cap_elem, sta);
2607
2608         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2609                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2610                                                     elems.vht_cap_elem, sta);
2611
2612         /*
2613          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2614          * in their association response, so ignore that data for our own
2615          * configuration. If it changed since the last beacon, we'll get the
2616          * next beacon and update then.
2617          */
2618
2619         /*
2620          * If an operating mode notification IE is present, override the
2621          * NSS calculation (that would be done in rate_control_rate_init())
2622          * and use the # of streams from that element.
2623          */
2624         if (elems.opmode_notif &&
2625             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2626                 u8 nss;
2627
2628                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2629                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2630                 nss += 1;
2631                 sta->sta.rx_nss = nss;
2632         }
2633
2634         rate_control_rate_init(sta);
2635
2636         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2637                 set_sta_flag(sta, WLAN_STA_MFP);
2638
2639         if (elems.wmm_param)
2640                 set_sta_flag(sta, WLAN_STA_WME);
2641
2642         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2643         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2644                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2645         if (err) {
2646                 sdata_info(sdata,
2647                            "failed to move station %pM to desired state\n",
2648                            sta->sta.addr);
2649                 WARN_ON(__sta_info_destroy(sta));
2650                 mutex_unlock(&sdata->local->sta_mtx);
2651                 ret = false;
2652                 goto out;
2653         }
2654
2655         mutex_unlock(&sdata->local->sta_mtx);
2656
2657         /*
2658          * Always handle WMM once after association regardless
2659          * of the first value the AP uses. Setting -1 here has
2660          * that effect because the AP values is an unsigned
2661          * 4-bit value.
2662          */
2663         ifmgd->wmm_last_param_set = -1;
2664
2665         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2666                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2667                                          elems.wmm_param_len);
2668         else
2669                 ieee80211_set_wmm_default(sdata, false);
2670         changed |= BSS_CHANGED_QOS;
2671
2672         /* set AID and assoc capability,
2673          * ieee80211_set_associated() will tell the driver */
2674         bss_conf->aid = aid;
2675         bss_conf->assoc_capability = capab_info;
2676         ieee80211_set_associated(sdata, cbss, changed);
2677
2678         /*
2679          * If we're using 4-addr mode, let the AP know that we're
2680          * doing so, so that it can create the STA VLAN on its side
2681          */
2682         if (ifmgd->use_4addr)
2683                 ieee80211_send_4addr_nullfunc(local, sdata);
2684
2685         /*
2686          * Start timer to probe the connection to the AP now.
2687          * Also start the timer that will detect beacon loss.
2688          */
2689         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2690         ieee80211_sta_reset_beacon_monitor(sdata);
2691
2692         ret = true;
2693  out:
2694         kfree(bss_ies);
2695         return ret;
2696 }
2697
2698 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2699                                          struct ieee80211_mgmt *mgmt,
2700                                          size_t len)
2701 {
2702         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2703         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2704         u16 capab_info, status_code, aid;
2705         struct ieee802_11_elems elems;
2706         u8 *pos;
2707         bool reassoc;
2708         struct cfg80211_bss *bss;
2709
2710         sdata_assert_lock(sdata);
2711
2712         if (!assoc_data)
2713                 return;
2714         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2715                 return;
2716
2717         /*
2718          * AssocResp and ReassocResp have identical structure, so process both
2719          * of them in this function.
2720          */
2721
2722         if (len < 24 + 6)
2723                 return;
2724
2725         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2726         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2727         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2728         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2729
2730         sdata_info(sdata,
2731                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2732                    reassoc ? "Rea" : "A", mgmt->sa,
2733                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2734
2735         pos = mgmt->u.assoc_resp.variable;
2736         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2737
2738         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2739             elems.timeout_int &&
2740             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2741                 u32 tu, ms;
2742                 tu = le32_to_cpu(elems.timeout_int->value);
2743                 ms = tu * 1024 / 1000;
2744                 sdata_info(sdata,
2745                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2746                            mgmt->sa, tu, ms);
2747                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2748                 assoc_data->timeout_started = true;
2749                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2750                         run_again(sdata, assoc_data->timeout);
2751                 return;
2752         }
2753
2754         bss = assoc_data->bss;
2755
2756         if (status_code != WLAN_STATUS_SUCCESS) {
2757                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2758                            mgmt->sa, status_code);
2759                 ieee80211_destroy_assoc_data(sdata, false);
2760         } else {
2761                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2762                         /* oops -- internal error -- send timeout for now */
2763                         ieee80211_destroy_assoc_data(sdata, false);
2764                         cfg80211_assoc_timeout(sdata->dev, bss);
2765                         return;
2766                 }
2767                 sdata_info(sdata, "associated\n");
2768
2769                 /*
2770                  * destroy assoc_data afterwards, as otherwise an idle
2771                  * recalc after assoc_data is NULL but before associated
2772                  * is set can cause the interface to go idle
2773                  */
2774                 ieee80211_destroy_assoc_data(sdata, true);
2775         }
2776
2777         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2778 }
2779
2780 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2781                                   struct ieee80211_mgmt *mgmt, size_t len,
2782                                   struct ieee80211_rx_status *rx_status,
2783                                   struct ieee802_11_elems *elems)
2784 {
2785         struct ieee80211_local *local = sdata->local;
2786         int freq;
2787         struct ieee80211_bss *bss;
2788         struct ieee80211_channel *channel;
2789
2790         sdata_assert_lock(sdata);
2791
2792         if (elems->ds_params)
2793                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2794                                                       rx_status->band);
2795         else
2796                 freq = rx_status->freq;
2797
2798         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2799
2800         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2801                 return;
2802
2803         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2804                                         channel);
2805         if (bss) {
2806                 ieee80211_rx_bss_put(local, bss);
2807                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2808         }
2809 }
2810
2811
2812 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2813                                          struct sk_buff *skb)
2814 {
2815         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2816         struct ieee80211_if_managed *ifmgd;
2817         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2818         size_t baselen, len = skb->len;
2819         struct ieee802_11_elems elems;
2820
2821         ifmgd = &sdata->u.mgd;
2822
2823         sdata_assert_lock(sdata);
2824
2825         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2826                 return; /* ignore ProbeResp to foreign address */
2827
2828         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2829         if (baselen > len)
2830                 return;
2831
2832         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2833                                false, &elems);
2834
2835         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2836
2837         if (ifmgd->associated &&
2838             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2839                 ieee80211_reset_ap_probe(sdata);
2840
2841         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2842             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2843                 /* got probe response, continue with auth */
2844                 sdata_info(sdata, "direct probe responded\n");
2845                 ifmgd->auth_data->tries = 0;
2846                 ifmgd->auth_data->timeout = jiffies;
2847                 ifmgd->auth_data->timeout_started = true;
2848                 run_again(sdata, ifmgd->auth_data->timeout);
2849         }
2850 }
2851
2852 /*
2853  * This is the canonical list of information elements we care about,
2854  * the filter code also gives us all changes to the Microsoft OUI
2855  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2856  *
2857  * We implement beacon filtering in software since that means we can
2858  * avoid processing the frame here and in cfg80211, and userspace
2859  * will not be able to tell whether the hardware supports it or not.
2860  *
2861  * XXX: This list needs to be dynamic -- userspace needs to be able to
2862  *      add items it requires. It also needs to be able to tell us to
2863  *      look out for other vendor IEs.
2864  */
2865 static const u64 care_about_ies =
2866         (1ULL << WLAN_EID_COUNTRY) |
2867         (1ULL << WLAN_EID_ERP_INFO) |
2868         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2869         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2870         (1ULL << WLAN_EID_HT_CAPABILITY) |
2871         (1ULL << WLAN_EID_HT_OPERATION);
2872
2873 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2874                                      struct ieee80211_mgmt *mgmt, size_t len,
2875                                      struct ieee80211_rx_status *rx_status)
2876 {
2877         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2878         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2879         size_t baselen;
2880         struct ieee802_11_elems elems;
2881         struct ieee80211_local *local = sdata->local;
2882         struct ieee80211_chanctx_conf *chanctx_conf;
2883         struct ieee80211_channel *chan;
2884         struct sta_info *sta;
2885         u32 changed = 0;
2886         bool erp_valid;
2887         u8 erp_value = 0;
2888         u32 ncrc;
2889         u8 *bssid;
2890         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2891
2892         sdata_assert_lock(sdata);
2893
2894         /* Process beacon from the current BSS */
2895         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2896         if (baselen > len)
2897                 return;
2898
2899         rcu_read_lock();
2900         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2901         if (!chanctx_conf) {
2902                 rcu_read_unlock();
2903                 return;
2904         }
2905
2906         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2907                 rcu_read_unlock();
2908                 return;
2909         }
2910         chan = chanctx_conf->def.chan;
2911         rcu_read_unlock();
2912
2913         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2914             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2915                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2916                                        len - baselen, false, &elems);
2917
2918                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2919                 if (elems.tim && !elems.parse_error) {
2920                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2921                         ifmgd->dtim_period = tim_ie->dtim_period;
2922                 }
2923                 ifmgd->have_beacon = true;
2924                 ifmgd->assoc_data->need_beacon = false;
2925                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2926                         sdata->vif.bss_conf.sync_tsf =
2927                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2928                         sdata->vif.bss_conf.sync_device_ts =
2929                                 rx_status->device_timestamp;
2930                         if (elems.tim)
2931                                 sdata->vif.bss_conf.sync_dtim_count =
2932                                         elems.tim->dtim_count;
2933                         else
2934                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2935                 }
2936                 /* continue assoc process */
2937                 ifmgd->assoc_data->timeout = jiffies;
2938                 ifmgd->assoc_data->timeout_started = true;
2939                 run_again(sdata, ifmgd->assoc_data->timeout);
2940                 return;
2941         }
2942
2943         if (!ifmgd->associated ||
2944             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2945                 return;
2946         bssid = ifmgd->associated->bssid;
2947
2948         /* Track average RSSI from the Beacon frames of the current AP */
2949         ifmgd->last_beacon_signal = rx_status->signal;
2950         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2951                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2952                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2953                 ifmgd->last_cqm_event_signal = 0;
2954                 ifmgd->count_beacon_signal = 1;
2955                 ifmgd->last_ave_beacon_signal = 0;
2956         } else {
2957                 ifmgd->ave_beacon_signal =
2958                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2959                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2960                          ifmgd->ave_beacon_signal) / 16;
2961                 ifmgd->count_beacon_signal++;
2962         }
2963
2964         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2965             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2966                 int sig = ifmgd->ave_beacon_signal;
2967                 int last_sig = ifmgd->last_ave_beacon_signal;
2968
2969                 /*
2970                  * if signal crosses either of the boundaries, invoke callback
2971                  * with appropriate parameters
2972                  */
2973                 if (sig > ifmgd->rssi_max_thold &&
2974                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2975                         ifmgd->last_ave_beacon_signal = sig;
2976                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2977                 } else if (sig < ifmgd->rssi_min_thold &&
2978                            (last_sig >= ifmgd->rssi_max_thold ||
2979                            last_sig == 0)) {
2980                         ifmgd->last_ave_beacon_signal = sig;
2981                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2982                 }
2983         }
2984
2985         if (bss_conf->cqm_rssi_thold &&
2986             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2987             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2988                 int sig = ifmgd->ave_beacon_signal / 16;
2989                 int last_event = ifmgd->last_cqm_event_signal;
2990                 int thold = bss_conf->cqm_rssi_thold;
2991                 int hyst = bss_conf->cqm_rssi_hyst;
2992                 if (sig < thold &&
2993                     (last_event == 0 || sig < last_event - hyst)) {
2994                         ifmgd->last_cqm_event_signal = sig;
2995                         ieee80211_cqm_rssi_notify(
2996                                 &sdata->vif,
2997                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2998                                 GFP_KERNEL);
2999                 } else if (sig > thold &&
3000                            (last_event == 0 || sig > last_event + hyst)) {
3001                         ifmgd->last_cqm_event_signal = sig;
3002                         ieee80211_cqm_rssi_notify(
3003                                 &sdata->vif,
3004                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3005                                 GFP_KERNEL);
3006                 }
3007         }
3008
3009         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3010                 mlme_dbg_ratelimited(sdata,
3011                                      "cancelling AP probe due to a received beacon\n");
3012                 ieee80211_reset_ap_probe(sdata);
3013         }
3014
3015         /*
3016          * Push the beacon loss detection into the future since
3017          * we are processing a beacon from the AP just now.
3018          */
3019         ieee80211_sta_reset_beacon_monitor(sdata);
3020
3021         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3022         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3023                                           len - baselen, false, &elems,
3024                                           care_about_ies, ncrc);
3025
3026         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3027                 bool directed_tim = ieee80211_check_tim(elems.tim,
3028                                                         elems.tim_len,
3029                                                         ifmgd->aid);
3030                 if (directed_tim) {
3031                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3032                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3033                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3034                                         ieee80211_hw_config(local,
3035                                                             IEEE80211_CONF_CHANGE_PS);
3036                                 }
3037                                 ieee80211_send_nullfunc(local, sdata, 0);
3038                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3039                                 local->pspolling = true;
3040
3041                                 /*
3042                                  * Here is assumed that the driver will be
3043                                  * able to send ps-poll frame and receive a
3044                                  * response even though power save mode is
3045                                  * enabled, but some drivers might require
3046                                  * to disable power save here. This needs
3047                                  * to be investigated.
3048                                  */
3049                                 ieee80211_send_pspoll(local, sdata);
3050                         }
3051                 }
3052         }
3053
3054         if (sdata->vif.p2p) {
3055                 struct ieee80211_p2p_noa_attr noa = {};
3056                 int ret;
3057
3058                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3059                                             len - baselen,
3060                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3061                                             (u8 *) &noa, sizeof(noa));
3062                 if (ret >= 2) {
3063                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3064                                 /* valid noa_attr and index changed */
3065                                 sdata->u.mgd.p2p_noa_index = noa.index;
3066                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3067                                 changed |= BSS_CHANGED_P2P_PS;
3068                                 /*
3069                                  * make sure we update all information, the CRC
3070                                  * mechanism doesn't look at P2P attributes.
3071                                  */
3072                                 ifmgd->beacon_crc_valid = false;
3073                         }
3074                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3075                         /* noa_attr not found and we had valid noa_attr before */
3076                         sdata->u.mgd.p2p_noa_index = -1;
3077                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3078                         changed |= BSS_CHANGED_P2P_PS;
3079                         ifmgd->beacon_crc_valid = false;
3080                 }
3081         }
3082
3083         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3084                 return;
3085         ifmgd->beacon_crc = ncrc;
3086         ifmgd->beacon_crc_valid = true;
3087
3088         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3089
3090         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3091                                          &elems, true);
3092
3093         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3094             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3095                                      elems.wmm_param_len))
3096                 changed |= BSS_CHANGED_QOS;
3097
3098         /*
3099          * If we haven't had a beacon before, tell the driver about the
3100          * DTIM period (and beacon timing if desired) now.
3101          */
3102         if (!ifmgd->have_beacon) {
3103                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3104                 if (elems.tim)
3105                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3106                 else
3107                         bss_conf->dtim_period = 1;
3108
3109                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3110                         sdata->vif.bss_conf.sync_tsf =
3111                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3112                         sdata->vif.bss_conf.sync_device_ts =
3113                                 rx_status->device_timestamp;
3114                         if (elems.tim)
3115                                 sdata->vif.bss_conf.sync_dtim_count =
3116                                         elems.tim->dtim_count;
3117                         else
3118                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3119                 }
3120
3121                 changed |= BSS_CHANGED_BEACON_INFO;
3122                 ifmgd->have_beacon = true;
3123
3124                 mutex_lock(&local->iflist_mtx);
3125                 ieee80211_recalc_ps(local, -1);
3126                 mutex_unlock(&local->iflist_mtx);
3127
3128                 ieee80211_recalc_ps_vif(sdata);
3129         }
3130
3131         if (elems.erp_info) {
3132                 erp_valid = true;
3133                 erp_value = elems.erp_info[0];
3134         } else {
3135                 erp_valid = false;
3136         }
3137         changed |= ieee80211_handle_bss_capability(sdata,
3138                         le16_to_cpu(mgmt->u.beacon.capab_info),
3139                         erp_valid, erp_value);
3140
3141         mutex_lock(&local->sta_mtx);
3142         sta = sta_info_get(sdata, bssid);
3143
3144         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3145                                 elems.vht_operation, bssid, &changed)) {
3146                 mutex_unlock(&local->sta_mtx);
3147                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3148                                        WLAN_REASON_DEAUTH_LEAVING,
3149                                        true, deauth_buf);
3150                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3151                                       sizeof(deauth_buf));
3152                 return;
3153         }
3154
3155         if (sta && elems.opmode_notif)
3156                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3157                                             rx_status->band, true);
3158         mutex_unlock(&local->sta_mtx);
3159
3160         if (elems.country_elem && elems.pwr_constr_elem &&
3161             mgmt->u.probe_resp.capab_info &
3162                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3163                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3164                                                        elems.country_elem,
3165                                                        elems.country_elem_len,
3166                                                        elems.pwr_constr_elem);
3167
3168         ieee80211_bss_info_change_notify(sdata, changed);
3169 }
3170
3171 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3172                                   struct sk_buff *skb)
3173 {
3174         struct ieee80211_rx_status *rx_status;
3175         struct ieee80211_mgmt *mgmt;
3176         u16 fc;
3177         struct ieee802_11_elems elems;
3178         int ies_len;
3179
3180         rx_status = (struct ieee80211_rx_status *) skb->cb;
3181         mgmt = (struct ieee80211_mgmt *) skb->data;
3182         fc = le16_to_cpu(mgmt->frame_control);
3183
3184         sdata_lock(sdata);
3185
3186         switch (fc & IEEE80211_FCTL_STYPE) {
3187         case IEEE80211_STYPE_BEACON:
3188                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3189                 break;
3190         case IEEE80211_STYPE_PROBE_RESP:
3191                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3192                 break;
3193         case IEEE80211_STYPE_AUTH:
3194                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3195                 break;
3196         case IEEE80211_STYPE_DEAUTH:
3197                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3198                 break;
3199         case IEEE80211_STYPE_DISASSOC:
3200                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3201                 break;
3202         case IEEE80211_STYPE_ASSOC_RESP:
3203         case IEEE80211_STYPE_REASSOC_RESP:
3204                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3205                 break;
3206         case IEEE80211_STYPE_ACTION:
3207                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3208                         ies_len = skb->len -
3209                                   offsetof(struct ieee80211_mgmt,
3210                                            u.action.u.chan_switch.variable);
3211
3212                         if (ies_len < 0)
3213                                 break;
3214
3215                         ieee802_11_parse_elems(
3216                                 mgmt->u.action.u.chan_switch.variable,
3217                                 ies_len, true, &elems);
3218
3219                         if (elems.parse_error)
3220                                 break;
3221
3222                         ieee80211_sta_process_chanswitch(sdata,
3223                                                          rx_status->mactime,
3224                                                          &elems, false);
3225                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3226                         ies_len = skb->len -
3227                                   offsetof(struct ieee80211_mgmt,
3228                                            u.action.u.ext_chan_switch.variable);
3229
3230                         if (ies_len < 0)
3231                                 break;
3232
3233                         ieee802_11_parse_elems(
3234                                 mgmt->u.action.u.ext_chan_switch.variable,
3235                                 ies_len, true, &elems);
3236
3237                         if (elems.parse_error)
3238                                 break;
3239
3240                         /* for the handling code pretend this was also an IE */
3241                         elems.ext_chansw_ie =
3242                                 &mgmt->u.action.u.ext_chan_switch.data;
3243
3244                         ieee80211_sta_process_chanswitch(sdata,
3245                                                          rx_status->mactime,
3246                                                          &elems, false);
3247                 }
3248                 break;
3249         }
3250         sdata_unlock(sdata);
3251 }
3252
3253 static void ieee80211_sta_timer(unsigned long data)
3254 {
3255         struct ieee80211_sub_if_data *sdata =
3256                 (struct ieee80211_sub_if_data *) data;
3257
3258         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3259 }
3260
3261 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3262                                           u8 *bssid, u8 reason, bool tx)
3263 {
3264         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3265
3266         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3267                                tx, frame_buf);
3268
3269         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3270                               IEEE80211_DEAUTH_FRAME_LEN);
3271 }
3272
3273 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3274 {
3275         struct ieee80211_local *local = sdata->local;
3276         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3277         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3278         u32 tx_flags = 0;
3279
3280         sdata_assert_lock(sdata);
3281
3282         if (WARN_ON_ONCE(!auth_data))
3283                 return -EINVAL;
3284
3285         auth_data->tries++;
3286
3287         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3288                 sdata_info(sdata, "authentication with %pM timed out\n",
3289                            auth_data->bss->bssid);
3290
3291                 /*
3292                  * Most likely AP is not in the range so remove the
3293                  * bss struct for that AP.
3294                  */
3295                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3296
3297                 return -ETIMEDOUT;
3298         }
3299
3300         drv_mgd_prepare_tx(local, sdata);
3301
3302         if (auth_data->bss->proberesp_ies) {
3303                 u16 trans = 1;
3304                 u16 status = 0;
3305
3306                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3307                            auth_data->bss->bssid, auth_data->tries,
3308                            IEEE80211_AUTH_MAX_TRIES);
3309
3310                 auth_data->expected_transaction = 2;
3311
3312                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3313                         trans = auth_data->sae_trans;
3314                         status = auth_data->sae_status;
3315                         auth_data->expected_transaction = trans;
3316                 }
3317
3318                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3319                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3320                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3321
3322                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3323                                     auth_data->data, auth_data->data_len,
3324                                     auth_data->bss->bssid,
3325                                     auth_data->bss->bssid, NULL, 0, 0,
3326                                     tx_flags);
3327         } else {
3328                 const u8 *ssidie;
3329
3330                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3331                            auth_data->bss->bssid, auth_data->tries,
3332                            IEEE80211_AUTH_MAX_TRIES);
3333
3334                 rcu_read_lock();
3335                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3336                 if (!ssidie) {
3337                         rcu_read_unlock();
3338                         return -EINVAL;
3339                 }
3340                 /*
3341                  * Direct probe is sent to broadcast address as some APs
3342                  * will not answer to direct packet in unassociated state.
3343                  */
3344                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3345                                          NULL, 0, (u32) -1, true, 0,
3346                                          auth_data->bss->channel, false);
3347                 rcu_read_unlock();
3348         }
3349
3350         if (tx_flags == 0) {
3351                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3352                 auth_data->timeout_started = true;
3353                 run_again(sdata, auth_data->timeout);
3354         } else {
3355                 auth_data->timeout =
3356                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3357                 auth_data->timeout_started = true;
3358                 run_again(sdata, auth_data->timeout);
3359         }
3360
3361         return 0;
3362 }
3363
3364 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3365 {
3366         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3367         struct ieee80211_local *local = sdata->local;
3368
3369         sdata_assert_lock(sdata);
3370
3371         assoc_data->tries++;
3372         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3373                 sdata_info(sdata, "association with %pM timed out\n",
3374                            assoc_data->bss->bssid);
3375
3376                 /*
3377                  * Most likely AP is not in the range so remove the
3378                  * bss struct for that AP.
3379                  */
3380                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3381
3382                 return -ETIMEDOUT;
3383         }
3384
3385         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3386                    assoc_data->bss->bssid, assoc_data->tries,
3387                    IEEE80211_ASSOC_MAX_TRIES);
3388         ieee80211_send_assoc(sdata);
3389
3390         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3391                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3392                 assoc_data->timeout_started = true;
3393                 run_again(sdata, assoc_data->timeout);
3394         } else {
3395                 assoc_data->timeout =
3396                         round_jiffies_up(jiffies +
3397                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3398                 assoc_data->timeout_started = true;
3399                 run_again(sdata, assoc_data->timeout);
3400         }
3401
3402         return 0;
3403 }
3404
3405 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3406                                   __le16 fc, bool acked)
3407 {
3408         struct ieee80211_local *local = sdata->local;
3409
3410         sdata->u.mgd.status_fc = fc;
3411         sdata->u.mgd.status_acked = acked;
3412         sdata->u.mgd.status_received = true;
3413
3414         ieee80211_queue_work(&local->hw, &sdata->work);
3415 }
3416
3417 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3418 {
3419         struct ieee80211_local *local = sdata->local;
3420         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3421
3422         sdata_lock(sdata);
3423
3424         if (ifmgd->status_received) {
3425                 __le16 fc = ifmgd->status_fc;
3426                 bool status_acked = ifmgd->status_acked;
3427
3428                 ifmgd->status_received = false;
3429                 if (ifmgd->auth_data &&
3430                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3431                         if (status_acked) {
3432                                 ifmgd->auth_data->timeout =
3433                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3434                                 run_again(sdata, ifmgd->auth_data->timeout);
3435                         } else {
3436                                 ifmgd->auth_data->timeout = jiffies - 1;
3437                         }
3438                         ifmgd->auth_data->timeout_started = true;
3439                 } else if (ifmgd->assoc_data &&
3440                            (ieee80211_is_assoc_req(fc) ||
3441                             ieee80211_is_reassoc_req(fc))) {
3442                         if (status_acked) {
3443                                 ifmgd->assoc_data->timeout =
3444                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3445                                 run_again(sdata, ifmgd->assoc_data->timeout);
3446                         } else {
3447                                 ifmgd->assoc_data->timeout = jiffies - 1;
3448                         }
3449                         ifmgd->assoc_data->timeout_started = true;
3450                 }
3451         }
3452
3453         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3454             time_after(jiffies, ifmgd->auth_data->timeout)) {
3455                 if (ifmgd->auth_data->done) {
3456                         /*
3457                          * ok ... we waited for assoc but userspace didn't,
3458                          * so let's just kill the auth data
3459                          */
3460                         ieee80211_destroy_auth_data(sdata, false);
3461                 } else if (ieee80211_probe_auth(sdata)) {
3462                         u8 bssid[ETH_ALEN];
3463
3464                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3465
3466                         ieee80211_destroy_auth_data(sdata, false);
3467
3468                         cfg80211_auth_timeout(sdata->dev, bssid);
3469                 }
3470         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3471                 run_again(sdata, ifmgd->auth_data->timeout);
3472
3473         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3474             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3475                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3476                     ieee80211_do_assoc(sdata)) {
3477                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3478
3479                         ieee80211_destroy_assoc_data(sdata, false);
3480                         cfg80211_assoc_timeout(sdata->dev, bss);
3481                 }
3482         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3483                 run_again(sdata, ifmgd->assoc_data->timeout);
3484
3485         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3486             ifmgd->associated) {
3487                 u8 bssid[ETH_ALEN];
3488                 int max_tries;
3489
3490                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3491
3492                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3493                         max_tries = max_nullfunc_tries;
3494                 else
3495                         max_tries = max_probe_tries;
3496
3497                 /* ACK received for nullfunc probing frame */
3498                 if (!ifmgd->probe_send_count)
3499                         ieee80211_reset_ap_probe(sdata);
3500                 else if (ifmgd->nullfunc_failed) {
3501                         if (ifmgd->probe_send_count < max_tries) {
3502                                 mlme_dbg(sdata,
3503                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3504                                          bssid, ifmgd->probe_send_count,
3505                                          max_tries);
3506                                 ieee80211_mgd_probe_ap_send(sdata);
3507                         } else {
3508                                 mlme_dbg(sdata,
3509                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3510                                          bssid);
3511                                 ieee80211_sta_connection_lost(sdata, bssid,
3512                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3513                                         false);
3514                         }
3515                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3516                         run_again(sdata, ifmgd->probe_timeout);
3517                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3518                         mlme_dbg(sdata,
3519                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3520                                  bssid, probe_wait_ms);
3521                         ieee80211_sta_connection_lost(sdata, bssid,
3522                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3523                 } else if (ifmgd->probe_send_count < max_tries) {
3524                         mlme_dbg(sdata,
3525                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3526                                  bssid, probe_wait_ms,
3527                                  ifmgd->probe_send_count, max_tries);
3528                         ieee80211_mgd_probe_ap_send(sdata);
3529                 } else {
3530                         /*
3531                          * We actually lost the connection ... or did we?
3532                          * Let's make sure!
3533                          */
3534                         wiphy_debug(local->hw.wiphy,
3535                                     "%s: No probe response from AP %pM"
3536                                     " after %dms, disconnecting.\n",
3537                                     sdata->name,
3538                                     bssid, probe_wait_ms);
3539
3540                         ieee80211_sta_connection_lost(sdata, bssid,
3541                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3542                 }
3543         }
3544
3545         sdata_unlock(sdata);
3546 }
3547
3548 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3549 {
3550         struct ieee80211_sub_if_data *sdata =
3551                 (struct ieee80211_sub_if_data *) data;
3552         struct ieee80211_local *local = sdata->local;
3553
3554         if (local->quiescing)
3555                 return;
3556
3557         sdata->u.mgd.connection_loss = false;
3558         ieee80211_queue_work(&sdata->local->hw,
3559                              &sdata->u.mgd.beacon_connection_loss_work);
3560 }
3561
3562 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3563 {
3564         struct ieee80211_sub_if_data *sdata =
3565                 (struct ieee80211_sub_if_data *) data;
3566         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3567         struct ieee80211_local *local = sdata->local;
3568
3569         if (local->quiescing)
3570                 return;
3571
3572         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3573 }
3574
3575 static void ieee80211_sta_monitor_work(struct work_struct *work)
3576 {
3577         struct ieee80211_sub_if_data *sdata =
3578                 container_of(work, struct ieee80211_sub_if_data,
3579                              u.mgd.monitor_work);
3580
3581         ieee80211_mgd_probe_ap(sdata, false);
3582 }
3583
3584 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3585 {
3586         u32 flags;
3587
3588         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3589                 __ieee80211_stop_poll(sdata);
3590
3591                 /* let's probe the connection once */
3592                 flags = sdata->local->hw.flags;
3593                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3594                         ieee80211_queue_work(&sdata->local->hw,
3595                                              &sdata->u.mgd.monitor_work);
3596                 /* and do all the other regular work too */
3597                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3598         }
3599 }
3600
3601 #ifdef CONFIG_PM
3602 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3603 {
3604         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3605
3606         sdata_lock(sdata);
3607         if (!ifmgd->associated) {
3608                 sdata_unlock(sdata);
3609                 return;
3610         }
3611
3612         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3613                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3614                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3615                 ieee80211_sta_connection_lost(sdata,
3616                                               ifmgd->associated->bssid,
3617                                               WLAN_REASON_UNSPECIFIED,
3618                                               true);
3619                 sdata_unlock(sdata);
3620                 return;
3621         }
3622         sdata_unlock(sdata);
3623 }
3624 #endif
3625
3626 /* interface setup */
3627 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3628 {
3629         struct ieee80211_if_managed *ifmgd;
3630
3631         ifmgd = &sdata->u.mgd;
3632         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3633         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3634         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3635                   ieee80211_beacon_connection_loss_work);
3636         INIT_WORK(&ifmgd->csa_connection_drop_work,
3637                   ieee80211_csa_connection_drop_work);
3638         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3639         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3640                     (unsigned long) sdata);
3641         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3642                     (unsigned long) sdata);
3643         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3644                     (unsigned long) sdata);
3645         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3646                     (unsigned long) sdata);
3647
3648         ifmgd->flags = 0;
3649         ifmgd->powersave = sdata->wdev.ps;
3650         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3651         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3652         ifmgd->p2p_noa_index = -1;
3653
3654         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3655                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3656         else
3657                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3658 }
3659
3660 /* scan finished notification */
3661 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3662 {
3663         struct ieee80211_sub_if_data *sdata;
3664
3665         /* Restart STA timers */
3666         rcu_read_lock();
3667         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3668                 if (ieee80211_sdata_running(sdata))
3669                         ieee80211_restart_sta_timer(sdata);
3670         }
3671         rcu_read_unlock();
3672 }
3673
3674 int ieee80211_max_network_latency(struct notifier_block *nb,
3675                                   unsigned long data, void *dummy)
3676 {
3677         s32 latency_usec = (s32) data;
3678         struct ieee80211_local *local =
3679                 container_of(nb, struct ieee80211_local,
3680                              network_latency_notifier);
3681
3682         mutex_lock(&local->iflist_mtx);
3683         ieee80211_recalc_ps(local, latency_usec);
3684         mutex_unlock(&local->iflist_mtx);
3685
3686         return 0;
3687 }
3688
3689 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3690                                      struct cfg80211_bss *cbss)
3691 {
3692         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3693         const u8 *ht_cap_ie, *vht_cap_ie;
3694         const struct ieee80211_ht_cap *ht_cap;
3695         const struct ieee80211_vht_cap *vht_cap;
3696         u8 chains = 1;
3697
3698         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3699                 return chains;
3700
3701         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3702         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3703                 ht_cap = (void *)(ht_cap_ie + 2);
3704                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3705                 /*
3706                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3707                  *       "Tx Unequal Modulation Supported" fields.
3708                  */
3709         }
3710
3711         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3712                 return chains;
3713
3714         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3715         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3716                 u8 nss;
3717                 u16 tx_mcs_map;
3718
3719                 vht_cap = (void *)(vht_cap_ie + 2);
3720                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3721                 for (nss = 8; nss > 0; nss--) {
3722                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3723                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3724                                 break;
3725                 }
3726                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3727                 chains = max(chains, nss);
3728         }
3729
3730         return chains;
3731 }
3732
3733 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3734                                   struct cfg80211_bss *cbss)
3735 {
3736         struct ieee80211_local *local = sdata->local;
3737         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3738         const struct ieee80211_ht_operation *ht_oper = NULL;
3739         const struct ieee80211_vht_operation *vht_oper = NULL;
3740         struct ieee80211_supported_band *sband;
3741         struct cfg80211_chan_def chandef;
3742         int ret;
3743
3744         sband = local->hw.wiphy->bands[cbss->channel->band];
3745
3746         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3747                           IEEE80211_STA_DISABLE_80P80MHZ |
3748                           IEEE80211_STA_DISABLE_160MHZ);
3749
3750         rcu_read_lock();
3751
3752         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3753             sband->ht_cap.ht_supported) {
3754                 const u8 *ht_oper_ie, *ht_cap;
3755
3756                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3757                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3758                         ht_oper = (void *)(ht_oper_ie + 2);
3759
3760                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3761                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3762                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3763                         ht_oper = NULL;
3764                 }
3765         }
3766
3767         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3768             sband->vht_cap.vht_supported) {
3769                 const u8 *vht_oper_ie, *vht_cap;
3770
3771                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3772                                                    WLAN_EID_VHT_OPERATION);
3773                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3774                         vht_oper = (void *)(vht_oper_ie + 2);
3775                 if (vht_oper && !ht_oper) {
3776                         vht_oper = NULL;
3777                         sdata_info(sdata,
3778                                    "AP advertised VHT without HT, disabling both\n");
3779                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3780                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3781                 }
3782
3783                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3784                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3785                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3786                         vht_oper = NULL;
3787                 }
3788         }
3789
3790         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3791                                                      cbss->channel,
3792                                                      ht_oper, vht_oper,
3793                                                      &chandef, false);
3794
3795         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3796                                       local->rx_chains);
3797
3798         rcu_read_unlock();
3799
3800         /* will change later if needed */
3801         sdata->smps_mode = IEEE80211_SMPS_OFF;
3802
3803         mutex_lock(&local->mtx);
3804         /*
3805          * If this fails (possibly due to channel context sharing
3806          * on incompatible channels, e.g. 80+80 and 160 sharing the
3807          * same control channel) try to use a smaller bandwidth.
3808          */
3809         ret = ieee80211_vif_use_channel(sdata, &chandef,
3810                                         IEEE80211_CHANCTX_SHARED);
3811
3812         /* don't downgrade for 5 and 10 MHz channels, though. */
3813         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3814             chandef.width == NL80211_CHAN_WIDTH_10)
3815                 goto out;
3816
3817         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3818                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3819                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3820                                                 IEEE80211_CHANCTX_SHARED);
3821         }
3822  out:
3823         mutex_unlock(&local->mtx);
3824         return ret;
3825 }
3826
3827 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3828                                      struct cfg80211_bss *cbss, bool assoc)
3829 {
3830         struct ieee80211_local *local = sdata->local;
3831         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3832         struct ieee80211_bss *bss = (void *)cbss->priv;
3833         struct sta_info *new_sta = NULL;
3834         bool have_sta = false;
3835         int err;
3836
3837         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3838                 return -EINVAL;
3839
3840         if (assoc) {
3841                 rcu_read_lock();
3842                 have_sta = sta_info_get(sdata, cbss->bssid);
3843                 rcu_read_unlock();
3844         }
3845
3846         if (!have_sta) {
3847                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3848                 if (!new_sta)
3849                         return -ENOMEM;
3850         }
3851         if (new_sta) {
3852                 u32 rates = 0, basic_rates = 0;
3853                 bool have_higher_than_11mbit;
3854                 int min_rate = INT_MAX, min_rate_index = -1;
3855                 struct ieee80211_chanctx_conf *chanctx_conf;
3856                 struct ieee80211_supported_band *sband;
3857                 const struct cfg80211_bss_ies *ies;
3858                 int shift;
3859                 u32 rate_flags;
3860
3861                 sband = local->hw.wiphy->bands[cbss->channel->band];
3862
3863                 err = ieee80211_prep_channel(sdata, cbss);
3864                 if (err) {
3865                         sta_info_free(local, new_sta);
3866                         return -EINVAL;
3867                 }
3868                 shift = ieee80211_vif_get_shift(&sdata->vif);
3869
3870                 rcu_read_lock();
3871                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3872                 if (WARN_ON(!chanctx_conf)) {
3873                         rcu_read_unlock();
3874                         sta_info_free(local, new_sta);
3875                         return -EINVAL;
3876                 }
3877                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3878                 rcu_read_unlock();
3879
3880                 ieee80211_get_rates(sband, bss->supp_rates,
3881                                     bss->supp_rates_len,
3882                                     &rates, &basic_rates,
3883                                     &have_higher_than_11mbit,
3884                                     &min_rate, &min_rate_index,
3885                                     shift, rate_flags);
3886
3887                 /*
3888                  * This used to be a workaround for basic rates missing
3889                  * in the association response frame. Now that we no
3890                  * longer use the basic rates from there, it probably
3891                  * doesn't happen any more, but keep the workaround so
3892                  * in case some *other* APs are buggy in different ways
3893                  * we can connect -- with a warning.
3894                  */
3895                 if (!basic_rates && min_rate_index >= 0) {
3896                         sdata_info(sdata,
3897                                    "No basic rates, using min rate instead\n");
3898                         basic_rates = BIT(min_rate_index);
3899                 }
3900
3901                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3902                 sdata->vif.bss_conf.basic_rates = basic_rates;
3903
3904                 /* cf. IEEE 802.11 9.2.12 */
3905                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3906                     have_higher_than_11mbit)
3907                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3908                 else
3909                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3910
3911                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3912
3913                 /* set timing information */
3914                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3915                 rcu_read_lock();
3916                 ies = rcu_dereference(cbss->beacon_ies);
3917                 if (ies) {
3918                         const u8 *tim_ie;
3919
3920                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3921                         sdata->vif.bss_conf.sync_device_ts =
3922                                 bss->device_ts_beacon;
3923                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3924                                                   ies->data, ies->len);
3925                         if (tim_ie && tim_ie[1] >= 2)
3926                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3927                         else
3928                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3929                 } else if (!(local->hw.flags &
3930                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3931                         ies = rcu_dereference(cbss->proberesp_ies);
3932                         /* must be non-NULL since beacon IEs were NULL */
3933                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3934                         sdata->vif.bss_conf.sync_device_ts =
3935                                 bss->device_ts_presp;
3936                         sdata->vif.bss_conf.sync_dtim_count = 0;
3937                 } else {
3938                         sdata->vif.bss_conf.sync_tsf = 0;
3939                         sdata->vif.bss_conf.sync_device_ts = 0;
3940                         sdata->vif.bss_conf.sync_dtim_count = 0;
3941                 }
3942                 rcu_read_unlock();
3943
3944                 /* tell driver about BSSID, basic rates and timing */
3945                 ieee80211_bss_info_change_notify(sdata,
3946                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3947                         BSS_CHANGED_BEACON_INT);
3948
3949                 if (assoc)
3950                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3951
3952                 err = sta_info_insert(new_sta);
3953                 new_sta = NULL;
3954                 if (err) {
3955                         sdata_info(sdata,
3956                                    "failed to insert STA entry for the AP (error %d)\n",
3957                                    err);
3958                         return err;
3959                 }
3960         } else
3961                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3962
3963         return 0;
3964 }
3965
3966 /* config hooks */
3967 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3968                        struct cfg80211_auth_request *req)
3969 {
3970         struct ieee80211_local *local = sdata->local;
3971         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3972         struct ieee80211_mgd_auth_data *auth_data;
3973         u16 auth_alg;
3974         int err;
3975
3976         /* prepare auth data structure */
3977
3978         switch (req->auth_type) {
3979         case NL80211_AUTHTYPE_OPEN_SYSTEM:
3980                 auth_alg = WLAN_AUTH_OPEN;
3981                 break;
3982         case NL80211_AUTHTYPE_SHARED_KEY:
3983                 if (IS_ERR(local->wep_tx_tfm))
3984                         return -EOPNOTSUPP;
3985                 auth_alg = WLAN_AUTH_SHARED_KEY;
3986                 break;
3987         case NL80211_AUTHTYPE_FT:
3988                 auth_alg = WLAN_AUTH_FT;
3989                 break;
3990         case NL80211_AUTHTYPE_NETWORK_EAP:
3991                 auth_alg = WLAN_AUTH_LEAP;
3992                 break;
3993         case NL80211_AUTHTYPE_SAE:
3994                 auth_alg = WLAN_AUTH_SAE;
3995                 break;
3996         default:
3997                 return -EOPNOTSUPP;
3998         }
3999
4000         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4001                             req->ie_len, GFP_KERNEL);
4002         if (!auth_data)
4003                 return -ENOMEM;
4004
4005         auth_data->bss = req->bss;
4006
4007         if (req->sae_data_len >= 4) {
4008                 __le16 *pos = (__le16 *) req->sae_data;
4009                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4010                 auth_data->sae_status = le16_to_cpu(pos[1]);
4011                 memcpy(auth_data->data, req->sae_data + 4,
4012                        req->sae_data_len - 4);
4013                 auth_data->data_len += req->sae_data_len - 4;
4014         }
4015
4016         if (req->ie && req->ie_len) {
4017                 memcpy(&auth_data->data[auth_data->data_len],
4018                        req->ie, req->ie_len);
4019                 auth_data->data_len += req->ie_len;
4020         }
4021
4022         if (req->key && req->key_len) {
4023                 auth_data->key_len = req->key_len;
4024                 auth_data->key_idx = req->key_idx;
4025                 memcpy(auth_data->key, req->key, req->key_len);
4026         }
4027
4028         auth_data->algorithm = auth_alg;
4029
4030         /* try to authenticate/probe */
4031
4032         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4033             ifmgd->assoc_data) {
4034                 err = -EBUSY;
4035                 goto err_free;
4036         }
4037
4038         if (ifmgd->auth_data)
4039                 ieee80211_destroy_auth_data(sdata, false);
4040
4041         /* prep auth_data so we don't go into idle on disassoc */
4042         ifmgd->auth_data = auth_data;
4043
4044         if (ifmgd->associated) {
4045                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4046
4047                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4048                                        WLAN_REASON_UNSPECIFIED,
4049                                        false, frame_buf);
4050
4051                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4052                                       sizeof(frame_buf));
4053         }
4054
4055         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4056
4057         err = ieee80211_prep_connection(sdata, req->bss, false);
4058         if (err)
4059                 goto err_clear;
4060
4061         err = ieee80211_probe_auth(sdata);
4062         if (err) {
4063                 sta_info_destroy_addr(sdata, req->bss->bssid);
4064                 goto err_clear;
4065         }
4066
4067         /* hold our own reference */
4068         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4069         return 0;
4070
4071  err_clear:
4072         memset(ifmgd->bssid, 0, ETH_ALEN);
4073         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4074         ifmgd->auth_data = NULL;
4075  err_free:
4076         kfree(auth_data);
4077         return err;
4078 }
4079
4080 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4081                                         const u8 *wmm_param, int len)
4082 {
4083         const u8 *pos;
4084         size_t left;
4085
4086         if (len < 8)
4087                 return false;
4088
4089         if (wmm_param[5] != 1 /* version */)
4090                 return false;
4091
4092         pos = wmm_param + 8;
4093         left = len - 8;
4094
4095         for (; left >= 4; left -= 4, pos += 4) {
4096                 u8 aifsn = pos[0] & 0x0f;
4097                 u8 ecwmin = pos[1] & 0x0f;
4098                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4099                 int aci = (pos[0] >> 5) & 0x03;
4100
4101                 if (aifsn < 2) {
4102                         sdata_info(sdata,
4103                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4104                                    aifsn, aci);
4105                         return false;
4106                 }
4107                 if (ecwmin > ecwmax) {
4108                         sdata_info(sdata,
4109                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4110                                    ecwmin, ecwmax, aci);
4111                         return false;
4112                 }
4113         }
4114
4115         return true;
4116 }
4117
4118 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4119                         struct cfg80211_assoc_request *req)
4120 {
4121         struct ieee80211_local *local = sdata->local;
4122         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4123         struct ieee80211_bss *bss = (void *)req->bss->priv;
4124         struct ieee80211_mgd_assoc_data *assoc_data;
4125         const struct cfg80211_bss_ies *beacon_ies;
4126         struct ieee80211_supported_band *sband;
4127         const u8 *ssidie, *ht_ie, *vht_ie;
4128         int i, err;
4129
4130         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4131         if (!assoc_data)
4132                 return -ENOMEM;
4133
4134         rcu_read_lock();
4135         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4136         if (!ssidie) {
4137                 rcu_read_unlock();
4138                 kfree(assoc_data);
4139                 return -EINVAL;
4140         }
4141         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4142         assoc_data->ssid_len = ssidie[1];
4143         rcu_read_unlock();
4144
4145         if (ifmgd->associated) {
4146                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4147
4148                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4149                                        WLAN_REASON_UNSPECIFIED,
4150                                        false, frame_buf);
4151
4152                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4153                                       sizeof(frame_buf));
4154         }
4155
4156         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4157                 err = -EBUSY;
4158                 goto err_free;
4159         }
4160
4161         if (ifmgd->assoc_data) {
4162                 err = -EBUSY;
4163                 goto err_free;
4164         }
4165
4166         if (ifmgd->auth_data) {
4167                 bool match;
4168
4169                 /* keep sta info, bssid if matching */
4170                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4171                 ieee80211_destroy_auth_data(sdata, match);
4172         }
4173
4174         /* prepare assoc data */
4175
4176         ifmgd->beacon_crc_valid = false;
4177
4178         assoc_data->wmm = bss->wmm_used &&
4179                           (local->hw.queues >= IEEE80211_NUM_ACS);
4180         if (assoc_data->wmm) {
4181                 /* try to check validity of WMM params IE */
4182                 const struct cfg80211_bss_ies *ies;
4183                 const u8 *wp, *start, *end;
4184
4185                 rcu_read_lock();
4186                 ies = rcu_dereference(req->bss->ies);
4187                 start = ies->data;
4188                 end = start + ies->len;
4189
4190                 while (true) {
4191                         wp = cfg80211_find_vendor_ie(
4192                                 WLAN_OUI_MICROSOFT,
4193                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4194                                 start, end - start);
4195                         if (!wp)
4196                                 break;
4197                         start = wp + wp[1] + 2;
4198                         /* if this IE is too short, try the next */
4199                         if (wp[1] <= 4)
4200                                 continue;
4201                         /* if this IE is WMM params, we found what we wanted */
4202                         if (wp[6] == 1)
4203                                 break;
4204                 }
4205
4206                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4207                                                         wp[1] - 2)) {
4208                         assoc_data->wmm = false;
4209                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4210                 }
4211                 rcu_read_unlock();
4212         }
4213
4214         /*
4215          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4216          * We still associate in non-HT mode (11a/b/g) if any one of these
4217          * ciphers is configured as pairwise.
4218          * We can set this to true for non-11n hardware, that'll be checked
4219          * separately along with the peer capabilities.
4220          */
4221         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4222                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4223                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4224                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4225                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4226                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4227                         netdev_info(sdata->dev,
4228                                     "disabling HT/VHT due to WEP/TKIP use\n");
4229                 }
4230         }
4231
4232         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4233                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4234                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4235         }
4236
4237         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4238                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4239
4240         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4241         sband = local->hw.wiphy->bands[req->bss->channel->band];
4242         if (!sband->ht_cap.ht_supported ||
4243             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4244             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4245                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4246                 if (!bss->wmm_used &&
4247                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4248                         netdev_info(sdata->dev,
4249                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4250         }
4251
4252         /* disable VHT if we don't support it or the AP doesn't use WMM */
4253         if (!sband->vht_cap.vht_supported ||
4254             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4255             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4256                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4257                 if (!bss->wmm_used &&
4258                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4259                         netdev_info(sdata->dev,
4260                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4261         }
4262
4263         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4264         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4265                sizeof(ifmgd->ht_capa_mask));
4266
4267         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4268         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4269                sizeof(ifmgd->vht_capa_mask));
4270
4271         if (req->ie && req->ie_len) {
4272                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4273                 assoc_data->ie_len = req->ie_len;
4274         }
4275
4276         assoc_data->bss = req->bss;
4277
4278         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4279                 if (ifmgd->powersave)
4280                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4281                 else
4282                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4283         } else
4284                 sdata->smps_mode = ifmgd->req_smps;
4285
4286         assoc_data->capability = req->bss->capability;
4287         assoc_data->supp_rates = bss->supp_rates;
4288         assoc_data->supp_rates_len = bss->supp_rates_len;
4289
4290         rcu_read_lock();
4291         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4292         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4293                 assoc_data->ap_ht_param =
4294                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4295         else
4296                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4297         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4298         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4299                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4300                        sizeof(struct ieee80211_vht_cap));
4301         else
4302                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4303         rcu_read_unlock();
4304
4305         if (bss->wmm_used && bss->uapsd_supported &&
4306             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4307             sdata->wmm_acm != 0xff) {
4308                 assoc_data->uapsd = true;
4309                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4310         } else {
4311                 assoc_data->uapsd = false;
4312                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4313         }
4314
4315         if (req->prev_bssid)
4316                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4317
4318         if (req->use_mfp) {
4319                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4320                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4321         } else {
4322                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4323                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4324         }
4325
4326         if (req->crypto.control_port)
4327                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4328         else
4329                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4330
4331         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4332         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4333         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4334                                                         sdata->vif.type);
4335
4336         /* kick off associate process */
4337
4338         ifmgd->assoc_data = assoc_data;
4339         ifmgd->dtim_period = 0;
4340         ifmgd->have_beacon = false;
4341
4342         err = ieee80211_prep_connection(sdata, req->bss, true);
4343         if (err)
4344                 goto err_clear;
4345
4346         rcu_read_lock();
4347         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4348
4349         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4350             !beacon_ies) {
4351                 /*
4352                  * Wait up to one beacon interval ...
4353                  * should this be more if we miss one?
4354                  */
4355                 sdata_info(sdata, "waiting for beacon from %pM\n",
4356                            ifmgd->bssid);
4357                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4358                 assoc_data->timeout_started = true;
4359                 assoc_data->need_beacon = true;
4360         } else if (beacon_ies) {
4361                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4362                                                     beacon_ies->data,
4363                                                     beacon_ies->len);
4364                 u8 dtim_count = 0;
4365
4366                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4367                         const struct ieee80211_tim_ie *tim;
4368                         tim = (void *)(tim_ie + 2);
4369                         ifmgd->dtim_period = tim->dtim_period;
4370                         dtim_count = tim->dtim_count;
4371                 }
4372                 ifmgd->have_beacon = true;
4373                 assoc_data->timeout = jiffies;
4374                 assoc_data->timeout_started = true;
4375
4376                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4377                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4378                         sdata->vif.bss_conf.sync_device_ts =
4379                                 bss->device_ts_beacon;
4380                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4381                 }
4382         } else {
4383                 assoc_data->timeout = jiffies;
4384                 assoc_data->timeout_started = true;
4385         }
4386         rcu_read_unlock();
4387
4388         run_again(sdata, assoc_data->timeout);
4389
4390         if (bss->corrupt_data) {
4391                 char *corrupt_type = "data";
4392                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4393                         if (bss->corrupt_data &
4394                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4395                                 corrupt_type = "beacon and probe response";
4396                         else
4397                                 corrupt_type = "beacon";
4398                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4399                         corrupt_type = "probe response";
4400                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4401                            corrupt_type);
4402         }
4403
4404         return 0;
4405  err_clear:
4406         memset(ifmgd->bssid, 0, ETH_ALEN);
4407         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4408         ifmgd->assoc_data = NULL;
4409  err_free:
4410         kfree(assoc_data);
4411         return err;
4412 }
4413
4414 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4415                          struct cfg80211_deauth_request *req)
4416 {
4417         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4418         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4419         bool tx = !req->local_state_change;
4420         bool report_frame = false;
4421
4422         sdata_info(sdata,
4423                    "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4424                    req->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4425
4426         if (ifmgd->auth_data) {
4427                 drv_mgd_prepare_tx(sdata->local, sdata);
4428                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4429                                                IEEE80211_STYPE_DEAUTH,
4430                                                req->reason_code, tx,
4431                                                frame_buf);
4432                 ieee80211_destroy_auth_data(sdata, false);
4433
4434                 report_frame = true;
4435                 goto out;
4436         }
4437
4438         if (ifmgd->associated &&
4439             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4440                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4441                                        req->reason_code, tx, frame_buf);
4442                 report_frame = true;
4443         }
4444
4445  out:
4446         if (report_frame)
4447                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4448                                       IEEE80211_DEAUTH_FRAME_LEN);
4449
4450         return 0;
4451 }
4452
4453 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4454                            struct cfg80211_disassoc_request *req)
4455 {
4456         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4457         u8 bssid[ETH_ALEN];
4458         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4459
4460         /*
4461          * cfg80211 should catch this ... but it's racy since
4462          * we can receive a disassoc frame, process it, hand it
4463          * to cfg80211 while that's in a locked section already
4464          * trying to tell us that the user wants to disconnect.
4465          */
4466         if (ifmgd->associated != req->bss)
4467                 return -ENOLINK;
4468
4469         sdata_info(sdata,
4470                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4471                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4472
4473         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4474         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4475                                req->reason_code, !req->local_state_change,
4476                                frame_buf);
4477
4478         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4479                               IEEE80211_DEAUTH_FRAME_LEN);
4480
4481         return 0;
4482 }
4483
4484 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4485 {
4486         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4487
4488         /*
4489          * Make sure some work items will not run after this,
4490          * they will not do anything but might not have been
4491          * cancelled when disconnecting.
4492          */
4493         cancel_work_sync(&ifmgd->monitor_work);
4494         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4495         cancel_work_sync(&ifmgd->request_smps_work);
4496         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4497         cancel_work_sync(&ifmgd->chswitch_work);
4498
4499         sdata_lock(sdata);
4500         if (ifmgd->assoc_data) {
4501                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4502                 ieee80211_destroy_assoc_data(sdata, false);
4503                 cfg80211_assoc_timeout(sdata->dev, bss);
4504         }
4505         if (ifmgd->auth_data)
4506                 ieee80211_destroy_auth_data(sdata, false);
4507         del_timer_sync(&ifmgd->timer);
4508         sdata_unlock(sdata);
4509 }
4510
4511 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4512                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4513                                gfp_t gfp)
4514 {
4515         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4516
4517         trace_api_cqm_rssi_notify(sdata, rssi_event);
4518
4519         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4520 }
4521 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);