net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33
  34 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  35 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  36 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  37 #define IEEE80211_AUTH_MAX_TRIES        3
  38 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  39 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  40 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  41 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  42 #define IEEE80211_ASSOC_MAX_TRIES       3
  43
  44 static int max_nullfunc_tries = 2;
  45 module_param(max_nullfunc_tries, int, 0644);
  46 MODULE_PARM_DESC(max_nullfunc_tries,
  47                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  48
  49 static int max_probe_tries = 5;
  50 module_param(max_probe_tries, int, 0644);
  51 MODULE_PARM_DESC(max_probe_tries,
  52                  "Maximum probe tries before disconnecting (reason 4).");
  53
  54 /*
  55  * Beacon loss timeout is calculated as N frames times the
  56  * advertised beacon interval.  This may need to be somewhat
  57  * higher than what hardware might detect to account for
  58  * delays in the host processing frames. But since we also
  59  * probe on beacon miss before declaring the connection lost
  60  * default to what we want.
  61  */
  62 static int beacon_loss_count = 7;
  63 module_param(beacon_loss_count, int, 0644);
  64 MODULE_PARM_DESC(beacon_loss_count,
  65                  "Number of beacon intervals before we decide beacon was lost.");
  66
  67 /*
  68  * Time the connection can be idle before we probe
  69  * it to see if we can still talk to the AP.
  70  */
  71 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  72 /*
  73  * Time we wait for a probe response after sending
  74  * a probe request because of beacon loss or for
  75  * checking the connection still works.
  76  */
  77 static int probe_wait_ms = 500;
  78 module_param(probe_wait_ms, int, 0644);
  79 MODULE_PARM_DESC(probe_wait_ms,
  80                  "Maximum time(ms) to wait for probe response"
  81                  " before disconnecting (reason 4).");
  82
  83 /*
  84  * How many Beacon frames need to have been used in average signal strength
  85  * before starting to indicate signal change events.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  88
  89 /*
  90  * We can have multiple work items (and connection probing)
  91  * scheduling this timer, but we need to take care to only
  92  * reschedule it when it should fire _earlier_ than it was
  93  * asked for before, or if it's not pending right now. This
  94  * function ensures that. Note that it then is required to
  95  * run this function for all timeouts after the first one
  96  * has happened -- the work that runs from this timer will
  97  * do that.
  98  */
  99 static void run_again(struct ieee80211_sub_if_data *sdata,
 100                       unsigned long timeout)
 101 {
 102         sdata_assert_lock(sdata);
 103
 104         if (!timer_pending(&sdata->u.mgd.timer) ||
 105             time_before(timeout, sdata->u.mgd.timer.expires))
 106                 mod_timer(&sdata->u.mgd.timer, timeout);
 107 }
 108
 109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 110 {
 111         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 112                 return;
 113
 114         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 115                 return;
 116
 117         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 118                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 119 }
 120
 121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 122 {
 123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 124
 125         if (unlikely(!sdata->u.mgd.associated))
 126                 return;
 127
 128         ifmgd->probe_send_count = 0;
 129
 130         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 131                 return;
 132
 133         mod_timer(&sdata->u.mgd.conn_mon_timer,
 134                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 135 }
 136
 137 static int ecw2cw(int ecw)
 138 {
 139         return (1 << ecw) - 1;
 140 }
 141
 142 static u32
 143 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 144                              struct ieee80211_supported_band *sband,
 145                              struct ieee80211_channel *channel,
 146                              const struct ieee80211_ht_cap *ht_cap,
 147                              const struct ieee80211_ht_operation *ht_oper,
 148                              const struct ieee80211_vht_operation *vht_oper,
 149                              struct cfg80211_chan_def *chandef, bool tracking)
 150 {
 151         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 152         struct cfg80211_chan_def vht_chandef;
 153         struct ieee80211_sta_ht_cap sta_ht_cap;
 154         u32 ht_cfreq, ret;
 155
 156         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 157         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 158
 159         chandef->chan = channel;
 160         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 161         chandef->center_freq1 = channel->center_freq;
 162         chandef->center_freq2 = 0;
 163
 164         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 165                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 166                 goto out;
 167         }
 168
 169         chandef->width = NL80211_CHAN_WIDTH_20;
 170
 171         if (!(ht_cap->cap_info &
 172               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 173                 ret = IEEE80211_STA_DISABLE_40MHZ;
 174                 vht_chandef = *chandef;
 175                 goto out;
 176         }
 177
 178         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 179                                                   channel->band);
 180         /* check that channel matches the right operating channel */
 181         if (!tracking && channel->center_freq != ht_cfreq) {
 182                 /*
 183                  * It's possible that some APs are confused here;
 184                  * Netgear WNDR3700 sometimes reports 4 higher than
 185                  * the actual channel in association responses, but
 186                  * since we look at probe response/beacon data here
 187                  * it should be OK.
 188                  */
 189                 sdata_info(sdata,
 190                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 191                            channel->center_freq, ht_cfreq,
 192                            ht_oper->primary_chan, channel->band);
 193                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 194                 goto out;
 195         }
 196
 197         /* check 40 MHz support, if we have it */
 198         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 199                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 200                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 201                         chandef->width = NL80211_CHAN_WIDTH_40;
 202                         chandef->center_freq1 += 10;
 203                         break;
 204                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 205                         chandef->width = NL80211_CHAN_WIDTH_40;
 206                         chandef->center_freq1 -= 10;
 207                         break;
 208                 }
 209         } else {
 210                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 211                 ret = IEEE80211_STA_DISABLE_VHT;
 212                 /* also mark 40 MHz disabled */
 213                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 214                 goto out;
 215         }
 216
 217         if (!vht_oper || !sband->vht_cap.vht_supported) {
 218                 ret = IEEE80211_STA_DISABLE_VHT;
 219                 goto out;
 220         }
 221
 222         vht_chandef.chan = channel;
 223         vht_chandef.center_freq1 =
 224                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 225                                                channel->band);
 226         vht_chandef.center_freq2 = 0;
 227
 228         switch (vht_oper->chan_width) {
 229         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 230                 vht_chandef.width = chandef->width;
 231                 vht_chandef.center_freq1 = chandef->center_freq1;
 232                 break;
 233         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 234                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 235                 break;
 236         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 237                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 238                 break;
 239         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 240                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 241                 vht_chandef.center_freq2 =
 242                         ieee80211_channel_to_frequency(
 243                                 vht_oper->center_freq_seg2_idx,
 244                                 channel->band);
 245                 break;
 246         default:
 247                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 248                         sdata_info(sdata,
 249                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 250                                    vht_oper->chan_width);
 251                 ret = IEEE80211_STA_DISABLE_VHT;
 252                 goto out;
 253         }
 254
 255         if (!cfg80211_chandef_valid(&vht_chandef)) {
 256                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 257                         sdata_info(sdata,
 258                                    "AP VHT information is invalid, disable VHT\n");
 259                 ret = IEEE80211_STA_DISABLE_VHT;
 260                 goto out;
 261         }
 262
 263         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 264                 ret = 0;
 265                 goto out;
 266         }
 267
 268         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 269                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 270                         sdata_info(sdata,
 271                                    "AP VHT information doesn't match HT, disable VHT\n");
 272                 ret = IEEE80211_STA_DISABLE_VHT;
 273                 goto out;
 274         }
 275
 276         *chandef = vht_chandef;
 277
 278         ret = 0;
 279
 280 out:
 281         /*
 282          * When tracking the current AP, don't do any further checks if the
 283          * new chandef is identical to the one we're currently using for the
 284          * connection. This keeps us from playing ping-pong with regulatory,
 285          * without it the following can happen (for example):
 286          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 287          *  - AP advertises regdom US
 288          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 289          *  - the code below detects an unsupported channel, downgrades, and
 290          *    we disconnect from the AP in the caller
 291          *  - disconnect causes CRDA to reload world regdomain and the game
 292          *    starts anew.
 293          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 294          *
 295          * It seems possible that there are still scenarios with CSA or real
 296          * bandwidth changes where a this could happen, but those cases are
 297          * less common and wouldn't completely prevent using the AP.
 298          */
 299         if (tracking &&
 300             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 301                 return ret;
 302
 303         /* don't print the message below for VHT mismatch if VHT is disabled */
 304         if (ret & IEEE80211_STA_DISABLE_VHT)
 305                 vht_chandef = *chandef;
 306
 307         /*
 308          * Ignore the DISABLED flag when we're already connected and only
 309          * tracking the APs beacon for bandwidth changes - otherwise we
 310          * might get disconnected here if we connect to an AP, update our
 311          * regulatory information based on the AP's country IE and the
 312          * information we have is wrong/outdated and disables the channel
 313          * that we're actually using for the connection to the AP.
 314          */
 315         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 316                                         tracking ? 0 :
 317                                                    IEEE80211_CHAN_DISABLED)) {
 318                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 319                         ret = IEEE80211_STA_DISABLE_HT |
 320                               IEEE80211_STA_DISABLE_VHT;
 321                         break;
 322                 }
 323
 324                 ret |= ieee80211_chandef_downgrade(chandef);
 325         }
 326
 327         if (chandef->width != vht_chandef.width && !tracking)
 328                 sdata_info(sdata,
 329                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 330
 331         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 332         return ret;
 333 }
 334
 335 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 336                                struct sta_info *sta,
 337                                const struct ieee80211_ht_cap *ht_cap,
 338                                const struct ieee80211_ht_operation *ht_oper,
 339                                const struct ieee80211_vht_operation *vht_oper,
 340                                const u8 *bssid, u32 *changed)
 341 {
 342         struct ieee80211_local *local = sdata->local;
 343         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 344         struct ieee80211_supported_band *sband;
 345         struct ieee80211_channel *chan;
 346         struct cfg80211_chan_def chandef;
 347         u16 ht_opmode;
 348         u32 flags;
 349         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 350         int ret;
 351
 352         /* if HT was/is disabled, don't track any bandwidth changes */
 353         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 354                 return 0;
 355
 356         /* don't check VHT if we associated as non-VHT station */
 357         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 358                 vht_oper = NULL;
 359
 360         if (WARN_ON_ONCE(!sta))
 361                 return -EINVAL;
 362
 363         /*
 364          * if bss configuration changed store the new one -
 365          * this may be applicable even if channel is identical
 366          */
 367         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 368         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 369                 *changed |= BSS_CHANGED_HT;
 370                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 371         }
 372
 373         chan = sdata->vif.bss_conf.chandef.chan;
 374         sband = local->hw.wiphy->bands[chan->band];
 375
 376         /* calculate new channel (type) based on HT/VHT operation IEs */
 377         flags = ieee80211_determine_chantype(sdata, sband, chan,
 378                                              ht_cap, ht_oper, vht_oper,
 379                                              &chandef, true);
 380
 381         /*
 382          * Downgrade the new channel if we associated with restricted
 383          * capabilities. For example, if we associated as a 20 MHz STA
 384          * to a 40 MHz AP (due to regulatory, capabilities or config
 385          * reasons) then switching to a 40 MHz channel now won't do us
 386          * any good -- we couldn't use it with the AP.
 387          */
 388         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 389             chandef.width == NL80211_CHAN_WIDTH_80P80)
 390                 flags |= ieee80211_chandef_downgrade(&chandef);
 391         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 392             chandef.width == NL80211_CHAN_WIDTH_160)
 393                 flags |= ieee80211_chandef_downgrade(&chandef);
 394         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 395             chandef.width > NL80211_CHAN_WIDTH_20)
 396                 flags |= ieee80211_chandef_downgrade(&chandef);
 397
 398         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 399                 return 0;
 400
 401         sdata_info(sdata,
 402                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 403                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 404                    chandef.center_freq1, chandef.center_freq2);
 405
 406         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 407                                       IEEE80211_STA_DISABLE_VHT |
 408                                       IEEE80211_STA_DISABLE_40MHZ |
 409                                       IEEE80211_STA_DISABLE_80P80MHZ |
 410                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 411             !cfg80211_chandef_valid(&chandef)) {
 412                 sdata_info(sdata,
 413                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 414                            ifmgd->bssid);
 415                 return -EINVAL;
 416         }
 417
 418         switch (chandef.width) {
 419         case NL80211_CHAN_WIDTH_20_NOHT:
 420         case NL80211_CHAN_WIDTH_20:
 421                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 422                 break;
 423         case NL80211_CHAN_WIDTH_40:
 424                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 425                 break;
 426         case NL80211_CHAN_WIDTH_80:
 427                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 428                 break;
 429         case NL80211_CHAN_WIDTH_80P80:
 430         case NL80211_CHAN_WIDTH_160:
 431                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 432                 break;
 433         default:
 434                 return -EINVAL;
 435         }
 436
 437         if (new_sta_bw > sta->cur_max_bandwidth)
 438                 new_sta_bw = sta->cur_max_bandwidth;
 439
 440         if (new_sta_bw < sta->sta.bandwidth) {
 441                 sta->sta.bandwidth = new_sta_bw;
 442                 rate_control_rate_update(local, sband, sta,
 443                                          IEEE80211_RC_BW_CHANGED);
 444         }
 445
 446         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 447         if (ret) {
 448                 sdata_info(sdata,
 449                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 450                            ifmgd->bssid);
 451                 return ret;
 452         }
 453
 454         if (new_sta_bw > sta->sta.bandwidth) {
 455                 sta->sta.bandwidth = new_sta_bw;
 456                 rate_control_rate_update(local, sband, sta,
 457                                          IEEE80211_RC_BW_CHANGED);
 458         }
 459
 460         return 0;
 461 }
 462
 463 /* frame sending functions */
 464
 465 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 466                                 struct sk_buff *skb, u8 ap_ht_param,
 467                                 struct ieee80211_supported_band *sband,
 468                                 struct ieee80211_channel *channel,
 469                                 enum ieee80211_smps_mode smps)
 470 {
 471         u8 *pos;
 472         u32 flags = channel->flags;
 473         u16 cap;
 474         struct ieee80211_sta_ht_cap ht_cap;
 475
 476         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 477
 478         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 479         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 480
 481         /* determine capability flags */
 482         cap = ht_cap.cap;
 483
 484         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 485         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 486                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 487                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 488                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 489                 }
 490                 break;
 491         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 492                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 493                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 494                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 495                 }
 496                 break;
 497         }
 498
 499         /*
 500          * If 40 MHz was disabled associate as though we weren't
 501          * capable of 40 MHz -- some broken APs will never fall
 502          * back to trying to transmit in 20 MHz.
 503          */
 504         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 505                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 506                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 507         }
 508
 509         /* set SM PS mode properly */
 510         cap &= ~IEEE80211_HT_CAP_SM_PS;
 511         switch (smps) {
 512         case IEEE80211_SMPS_AUTOMATIC:
 513         case IEEE80211_SMPS_NUM_MODES:
 514                 WARN_ON(1);
 515         case IEEE80211_SMPS_OFF:
 516                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 517                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 518                 break;
 519         case IEEE80211_SMPS_STATIC:
 520                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 521                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 522                 break;
 523         case IEEE80211_SMPS_DYNAMIC:
 524                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 525                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 526                 break;
 527         }
 528
 529         /* reserve and fill IE */
 530         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 531         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 532 }
 533
 534 /* This function determines vht capability flags for the association
 535  * and builds the IE.
 536  * Note - the function may set the owner of the MU-MIMO capability
 537  */
 538 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 539                                  struct sk_buff *skb,
 540                                  struct ieee80211_supported_band *sband,
 541                                  struct ieee80211_vht_cap *ap_vht_cap)
 542 {
 543         struct ieee80211_local *local = sdata->local;
 544         u8 *pos;
 545         u32 cap;
 546         struct ieee80211_sta_vht_cap vht_cap;
 547         u32 mask, ap_bf_sts, our_bf_sts;
 548
 549         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 550
 551         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 552         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 553
 554         /* determine capability flags */
 555         cap = vht_cap.cap;
 556
 557         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 558                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 559
 560                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 561                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 562                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 563                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 564         }
 565
 566         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 567                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 568                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 569         }
 570
 571         /*
 572          * Some APs apparently get confused if our capabilities are better
 573          * than theirs, so restrict what we advertise in the assoc request.
 574          */
 575         if (!(ap_vht_cap->vht_cap_info &
 576                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 577                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 578                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 579         else if (!(ap_vht_cap->vht_cap_info &
 580                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 581                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 582
 583         /*
 584          * If some other vif is using the MU-MIMO capablity we cannot associate
 585          * using MU-MIMO - this will lead to contradictions in the group-id
 586          * mechanism.
 587          * Ownership is defined since association request, in order to avoid
 588          * simultaneous associations with MU-MIMO.
 589          */
 590         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 591                 bool disable_mu_mimo = false;
 592                 struct ieee80211_sub_if_data *other;
 593
 594                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 595                         if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
 596                                 disable_mu_mimo = true;
 597                                 break;
 598                         }
 599                 }
 600                 if (disable_mu_mimo)
 601                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 602                 else
 603                         sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
 604         }
 605
 606         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 607
 608         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 609         our_bf_sts = cap & mask;
 610
 611         if (ap_bf_sts < our_bf_sts) {
 612                 cap &= ~mask;
 613                 cap |= ap_bf_sts;
 614         }
 615
 616         /* reserve and fill IE */
 617         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 618         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 619 }
 620
 621 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 622 {
 623         struct ieee80211_local *local = sdata->local;
 624         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 625         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 626         struct sk_buff *skb;
 627         struct ieee80211_mgmt *mgmt;
 628         u8 *pos, qos_info;
 629         size_t offset = 0, noffset;
 630         int i, count, rates_len, supp_rates_len, shift;
 631         u16 capab;
 632         struct ieee80211_supported_band *sband;
 633         struct ieee80211_chanctx_conf *chanctx_conf;
 634         struct ieee80211_channel *chan;
 635         u32 rate_flags, rates = 0;
 636
 637         sdata_assert_lock(sdata);
 638
 639         rcu_read_lock();
 640         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 641         if (WARN_ON(!chanctx_conf)) {
 642                 rcu_read_unlock();
 643                 return;
 644         }
 645         chan = chanctx_conf->def.chan;
 646         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 647         rcu_read_unlock();
 648         sband = local->hw.wiphy->bands[chan->band];
 649         shift = ieee80211_vif_get_shift(&sdata->vif);
 650
 651         if (assoc_data->supp_rates_len) {
 652                 /*
 653                  * Get all rates supported by the device and the AP as
 654                  * some APs don't like getting a superset of their rates
 655                  * in the association request (e.g. D-Link DAP 1353 in
 656                  * b-only mode)...
 657                  */
 658                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 659                                                      assoc_data->supp_rates,
 660                                                      assoc_data->supp_rates_len,
 661                                                      &rates);
 662         } else {
 663                 /*
 664                  * In case AP not provide any supported rates information
 665                  * before association, we send information element(s) with
 666                  * all rates that we support.
 667                  */
 668                 rates_len = 0;
 669                 for (i = 0; i < sband->n_bitrates; i++) {
 670                         if ((rate_flags & sband->bitrates[i].flags)
 671                             != rate_flags)
 672                                 continue;
 673                         rates |= BIT(i);
 674                         rates_len++;
 675                 }
 676         }
 677
 678         skb = alloc_skb(local->hw.extra_tx_headroom +
 679                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 680                         2 + assoc_data->ssid_len + /* SSID */
 681                         4 + rates_len + /* (extended) rates */
 682                         4 + /* power capability */
 683                         2 + 2 * sband->n_channels + /* supported channels */
 684                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 685                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 686                         assoc_data->ie_len + /* extra IEs */
 687                         9, /* WMM */
 688                         GFP_KERNEL);
 689         if (!skb)
 690                 return;
 691
 692         skb_reserve(skb, local->hw.extra_tx_headroom);
 693
 694         capab = WLAN_CAPABILITY_ESS;
 695
 696         if (sband->band == IEEE80211_BAND_2GHZ) {
 697                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 698                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 699         }
 700
 701         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 702                 capab |= WLAN_CAPABILITY_PRIVACY;
 703
 704         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 705             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 706                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 707
 708         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 709                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 710
 711         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 712         memset(mgmt, 0, 24);
 713         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 714         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 715         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 716
 717         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 718                 skb_put(skb, 10);
 719                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 720                                                   IEEE80211_STYPE_REASSOC_REQ);
 721                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 722                 mgmt->u.reassoc_req.listen_interval =
 723                                 cpu_to_le16(local->hw.conf.listen_interval);
 724                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 725                        ETH_ALEN);
 726         } else {
 727                 skb_put(skb, 4);
 728                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 729                                                   IEEE80211_STYPE_ASSOC_REQ);
 730                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 731                 mgmt->u.assoc_req.listen_interval =
 732                                 cpu_to_le16(local->hw.conf.listen_interval);
 733         }
 734
 735         /* SSID */
 736         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 737         *pos++ = WLAN_EID_SSID;
 738         *pos++ = assoc_data->ssid_len;
 739         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 740
 741         /* add all rates which were marked to be used above */
 742         supp_rates_len = rates_len;
 743         if (supp_rates_len > 8)
 744                 supp_rates_len = 8;
 745
 746         pos = skb_put(skb, supp_rates_len + 2);
 747         *pos++ = WLAN_EID_SUPP_RATES;
 748         *pos++ = supp_rates_len;
 749
 750         count = 0;
 751         for (i = 0; i < sband->n_bitrates; i++) {
 752                 if (BIT(i) & rates) {
 753                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 754                                                 5 * (1 << shift));
 755                         *pos++ = (u8) rate;
 756                         if (++count == 8)
 757                                 break;
 758                 }
 759         }
 760
 761         if (rates_len > count) {
 762                 pos = skb_put(skb, rates_len - count + 2);
 763                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 764                 *pos++ = rates_len - count;
 765
 766                 for (i++; i < sband->n_bitrates; i++) {
 767                         if (BIT(i) & rates) {
 768                                 int rate;
 769                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 770                                                     5 * (1 << shift));
 771                                 *pos++ = (u8) rate;
 772                         }
 773                 }
 774         }
 775
 776         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 777             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 778                 pos = skb_put(skb, 4);
 779                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 780                 *pos++ = 2;
 781                 *pos++ = 0; /* min tx power */
 782                  /* max tx power */
 783                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 784         }
 785
 786         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 787                 /* TODO: get this in reg domain format */
 788                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 789                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 790                 *pos++ = 2 * sband->n_channels;
 791                 for (i = 0; i < sband->n_channels; i++) {
 792                         *pos++ = ieee80211_frequency_to_channel(
 793                                         sband->channels[i].center_freq);
 794                         *pos++ = 1; /* one channel in the subband*/
 795                 }
 796         }
 797
 798         /* if present, add any custom IEs that go before HT */
 799         if (assoc_data->ie_len) {
 800                 static const u8 before_ht[] = {
 801                         WLAN_EID_SSID,
 802                         WLAN_EID_SUPP_RATES,
 803                         WLAN_EID_EXT_SUPP_RATES,
 804                         WLAN_EID_PWR_CAPABILITY,
 805                         WLAN_EID_SUPPORTED_CHANNELS,
 806                         WLAN_EID_RSN,
 807                         WLAN_EID_QOS_CAPA,
 808                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 809                         WLAN_EID_MOBILITY_DOMAIN,
 810                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 811                         WLAN_EID_RIC_DATA,              /* reassoc only */
 812                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 813                 };
 814                 static const u8 after_ric[] = {
 815                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 816                         WLAN_EID_HT_CAPABILITY,
 817                         WLAN_EID_BSS_COEX_2040,
 818                         WLAN_EID_EXT_CAPABILITY,
 819                         WLAN_EID_QOS_TRAFFIC_CAPA,
 820                         WLAN_EID_TIM_BCAST_REQ,
 821                         WLAN_EID_INTERWORKING,
 822                         /* 60GHz doesn't happen right now */
 823                         WLAN_EID_VHT_CAPABILITY,
 824                         WLAN_EID_OPMODE_NOTIF,
 825                 };
 826
 827                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 828                                                  assoc_data->ie_len,
 829                                                  before_ht,
 830                                                  ARRAY_SIZE(before_ht),
 831                                                  after_ric,
 832                                                  ARRAY_SIZE(after_ric),
 833                                                  offset);
 834                 pos = skb_put(skb, noffset - offset);
 835                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 836                 offset = noffset;
 837         }
 838
 839         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 840                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 841                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 842
 843         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 844                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 845                                     sband, chan, sdata->smps_mode);
 846
 847         /* if present, add any custom IEs that go before VHT */
 848         if (assoc_data->ie_len) {
 849                 static const u8 before_vht[] = {
 850                         WLAN_EID_SSID,
 851                         WLAN_EID_SUPP_RATES,
 852                         WLAN_EID_EXT_SUPP_RATES,
 853                         WLAN_EID_PWR_CAPABILITY,
 854                         WLAN_EID_SUPPORTED_CHANNELS,
 855                         WLAN_EID_RSN,
 856                         WLAN_EID_QOS_CAPA,
 857                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 858                         WLAN_EID_MOBILITY_DOMAIN,
 859                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 860                         WLAN_EID_HT_CAPABILITY,
 861                         WLAN_EID_BSS_COEX_2040,
 862                         WLAN_EID_EXT_CAPABILITY,
 863                         WLAN_EID_QOS_TRAFFIC_CAPA,
 864                         WLAN_EID_TIM_BCAST_REQ,
 865                         WLAN_EID_INTERWORKING,
 866                 };
 867
 868                 /* RIC already taken above, so no need to handle here anymore */
 869                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 870                                              before_vht, ARRAY_SIZE(before_vht),
 871                                              offset);
 872                 pos = skb_put(skb, noffset - offset);
 873                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 874                 offset = noffset;
 875         }
 876
 877         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 878                 ieee80211_add_vht_ie(sdata, skb, sband,
 879                                      &assoc_data->ap_vht_cap);
 880
 881         /* if present, add any custom non-vendor IEs that go after HT */
 882         if (assoc_data->ie_len) {
 883                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 884                                                     assoc_data->ie_len,
 885                                                     offset);
 886                 pos = skb_put(skb, noffset - offset);
 887                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 888                 offset = noffset;
 889         }
 890
 891         if (assoc_data->wmm) {
 892                 if (assoc_data->uapsd) {
 893                         qos_info = ifmgd->uapsd_queues;
 894                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 895                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 896                 } else {
 897                         qos_info = 0;
 898                 }
 899
 900                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 901         }
 902
 903         /* add any remaining custom (i.e. vendor specific here) IEs */
 904         if (assoc_data->ie_len) {
 905                 noffset = assoc_data->ie_len;
 906                 pos = skb_put(skb, noffset - offset);
 907                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 908         }
 909
 910         drv_mgd_prepare_tx(local, sdata);
 911
 912         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 913         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 914                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 915                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 916         ieee80211_tx_skb(sdata, skb);
 917 }
 918
 919 void ieee80211_send_pspoll(struct ieee80211_local *local,
 920                            struct ieee80211_sub_if_data *sdata)
 921 {
 922         struct ieee80211_pspoll *pspoll;
 923         struct sk_buff *skb;
 924
 925         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 926         if (!skb)
 927                 return;
 928
 929         pspoll = (struct ieee80211_pspoll *) skb->data;
 930         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 931
 932         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 933         ieee80211_tx_skb(sdata, skb);
 934 }
 935
 936 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 937                              struct ieee80211_sub_if_data *sdata,
 938                              bool powersave)
 939 {
 940         struct sk_buff *skb;
 941         struct ieee80211_hdr_3addr *nullfunc;
 942         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 943
 944         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 945         if (!skb)
 946                 return;
 947
 948         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 949         if (powersave)
 950                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 951
 952         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 953                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 954
 955         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 956                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 957
 958         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 959                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 960
 961         ieee80211_tx_skb(sdata, skb);
 962 }
 963
 964 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 965                                           struct ieee80211_sub_if_data *sdata)
 966 {
 967         struct sk_buff *skb;
 968         struct ieee80211_hdr *nullfunc;
 969         __le16 fc;
 970
 971         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 972                 return;
 973
 974         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 975         if (!skb)
 976                 return;
 977
 978         skb_reserve(skb, local->hw.extra_tx_headroom);
 979
 980         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 981         memset(nullfunc, 0, 30);
 982         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 983                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 984         nullfunc->frame_control = fc;
 985         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 986         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 987         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 988         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 989
 990         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 991         ieee80211_tx_skb(sdata, skb);
 992 }
 993
 994 /* spectrum management related things */
 995 static void ieee80211_chswitch_work(struct work_struct *work)
 996 {
 997         struct ieee80211_sub_if_data *sdata =
 998                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 999         struct ieee80211_local *local = sdata->local;
1000         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1001         int ret;
1002
1003         if (!ieee80211_sdata_running(sdata))
1004                 return;
1005
1006         sdata_lock(sdata);
1007         mutex_lock(&local->mtx);
1008         mutex_lock(&local->chanctx_mtx);
1009
1010         if (!ifmgd->associated)
1011                 goto out;
1012
1013         if (!sdata->vif.csa_active)
1014                 goto out;
1015
1016         /*
1017          * using reservation isn't immediate as it may be deferred until later
1018          * with multi-vif. once reservation is complete it will re-schedule the
1019          * work with no reserved_chanctx so verify chandef to check if it
1020          * completed successfully
1021          */
1022
1023         if (sdata->reserved_chanctx) {
1024                 /*
1025                  * with multi-vif csa driver may call ieee80211_csa_finish()
1026                  * many times while waiting for other interfaces to use their
1027                  * reservations
1028                  */
1029                 if (sdata->reserved_ready)
1030                         goto out;
1031
1032                 ret = ieee80211_vif_use_reserved_context(sdata);
1033                 if (ret) {
1034                         sdata_info(sdata,
1035                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1036                                    ret);
1037                         ieee80211_queue_work(&sdata->local->hw,
1038                                              &ifmgd->csa_connection_drop_work);
1039                         goto out;
1040                 }
1041
1042                 goto out;
1043         }
1044
1045         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1046                                         &sdata->csa_chandef)) {
1047                 sdata_info(sdata,
1048                            "failed to finalize channel switch, disconnecting\n");
1049                 ieee80211_queue_work(&sdata->local->hw,
1050                                      &ifmgd->csa_connection_drop_work);
1051                 goto out;
1052         }
1053
1054         /* XXX: shouldn't really modify cfg80211-owned data! */
1055         ifmgd->associated->channel = sdata->csa_chandef.chan;
1056
1057         ifmgd->csa_waiting_bcn = true;
1058
1059         ieee80211_sta_reset_beacon_monitor(sdata);
1060         ieee80211_sta_reset_conn_monitor(sdata);
1061
1062 out:
1063         mutex_unlock(&local->chanctx_mtx);
1064         mutex_unlock(&local->mtx);
1065         sdata_unlock(sdata);
1066 }
1067
1068 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1069 {
1070         struct ieee80211_local *local = sdata->local;
1071         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1072         int ret;
1073
1074         sdata_assert_lock(sdata);
1075
1076         WARN_ON(!sdata->vif.csa_active);
1077
1078         if (sdata->csa_block_tx) {
1079                 ieee80211_wake_vif_queues(local, sdata,
1080                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1081                 sdata->csa_block_tx = false;
1082         }
1083
1084         sdata->vif.csa_active = false;
1085         ifmgd->csa_waiting_bcn = false;
1086
1087         ret = drv_post_channel_switch(sdata);
1088         if (ret) {
1089                 sdata_info(sdata,
1090                            "driver post channel switch failed, disconnecting\n");
1091                 ieee80211_queue_work(&local->hw,
1092                                      &ifmgd->csa_connection_drop_work);
1093                 return;
1094         }
1095
1096         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1097 }
1098
1099 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1100 {
1101         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1102         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1103
1104         trace_api_chswitch_done(sdata, success);
1105         if (!success) {
1106                 sdata_info(sdata,
1107                            "driver channel switch failed, disconnecting\n");
1108                 ieee80211_queue_work(&sdata->local->hw,
1109                                      &ifmgd->csa_connection_drop_work);
1110         } else {
1111                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1112         }
1113 }
1114 EXPORT_SYMBOL(ieee80211_chswitch_done);
1115
1116 static void ieee80211_chswitch_timer(unsigned long data)
1117 {
1118         struct ieee80211_sub_if_data *sdata =
1119                 (struct ieee80211_sub_if_data *) data;
1120
1121         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1122 }
1123
1124 static void
1125 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1126                                  u64 timestamp, u32 device_timestamp,
1127                                  struct ieee802_11_elems *elems,
1128                                  bool beacon)
1129 {
1130         struct ieee80211_local *local = sdata->local;
1131         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1132         struct cfg80211_bss *cbss = ifmgd->associated;
1133         struct ieee80211_chanctx_conf *conf;
1134         struct ieee80211_chanctx *chanctx;
1135         enum ieee80211_band current_band;
1136         struct ieee80211_csa_ie csa_ie;
1137         struct ieee80211_channel_switch ch_switch;
1138         int res;
1139
1140         sdata_assert_lock(sdata);
1141
1142         if (!cbss)
1143                 return;
1144
1145         if (local->scanning)
1146                 return;
1147
1148         /* disregard subsequent announcements if we are already processing */
1149         if (sdata->vif.csa_active)
1150                 return;
1151
1152         current_band = cbss->channel->band;
1153         memset(&csa_ie, 0, sizeof(csa_ie));
1154         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1155                                            ifmgd->flags,
1156                                            ifmgd->associated->bssid, &csa_ie);
1157         if (res < 0)
1158                 ieee80211_queue_work(&local->hw,
1159                                      &ifmgd->csa_connection_drop_work);
1160         if (res)
1161                 return;
1162
1163         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1164                                      IEEE80211_CHAN_DISABLED)) {
1165                 sdata_info(sdata,
1166                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167                            ifmgd->associated->bssid,
1168                            csa_ie.chandef.chan->center_freq,
1169                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1170                            csa_ie.chandef.center_freq2);
1171                 ieee80211_queue_work(&local->hw,
1172                                      &ifmgd->csa_connection_drop_work);
1173                 return;
1174         }
1175
1176         if (cfg80211_chandef_identical(&csa_ie.chandef,
1177                                        &sdata->vif.bss_conf.chandef)) {
1178                 if (ifmgd->csa_ignored_same_chan)
1179                         return;
1180                 sdata_info(sdata,
1181                            "AP %pM tries to chanswitch to same channel, ignore\n",
1182                            ifmgd->associated->bssid);
1183                 ifmgd->csa_ignored_same_chan = true;
1184                 return;
1185         }
1186
1187         /*
1188          * Drop all TDLS peers - either we disconnect or move to a different
1189          * channel from this point on. There's no telling what our peer will do.
1190          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191          * have an incompatible wider chandef.
1192          */
1193         ieee80211_teardown_tdls_peers(sdata);
1194
1195         mutex_lock(&local->mtx);
1196         mutex_lock(&local->chanctx_mtx);
1197         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1198                                          lockdep_is_held(&local->chanctx_mtx));
1199         if (!conf) {
1200                 sdata_info(sdata,
1201                            "no channel context assigned to vif?, disconnecting\n");
1202                 goto drop_connection;
1203         }
1204
1205         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1206
1207         if (local->use_chanctx &&
1208             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1209                 sdata_info(sdata,
1210                            "driver doesn't support chan-switch with channel contexts\n");
1211                 goto drop_connection;
1212         }
1213
1214         ch_switch.timestamp = timestamp;
1215         ch_switch.device_timestamp = device_timestamp;
1216         ch_switch.block_tx = csa_ie.mode;
1217         ch_switch.chandef = csa_ie.chandef;
1218         ch_switch.count = csa_ie.count;
1219
1220         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1221                 sdata_info(sdata,
1222                            "preparing for channel switch failed, disconnecting\n");
1223                 goto drop_connection;
1224         }
1225
1226         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1227                                             chanctx->mode, false);
1228         if (res) {
1229                 sdata_info(sdata,
1230                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1231                            res);
1232                 goto drop_connection;
1233         }
1234         mutex_unlock(&local->chanctx_mtx);
1235
1236         sdata->vif.csa_active = true;
1237         sdata->csa_chandef = csa_ie.chandef;
1238         sdata->csa_block_tx = csa_ie.mode;
1239         ifmgd->csa_ignored_same_chan = false;
1240
1241         if (sdata->csa_block_tx)
1242                 ieee80211_stop_vif_queues(local, sdata,
1243                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1244         mutex_unlock(&local->mtx);
1245
1246         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1247                                           csa_ie.count);
1248
1249         if (local->ops->channel_switch) {
1250                 /* use driver's channel switch callback */
1251                 drv_channel_switch(local, sdata, &ch_switch);
1252                 return;
1253         }
1254
1255         /* channel switch handled in software */
1256         if (csa_ie.count <= 1)
1257                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1258         else
1259                 mod_timer(&ifmgd->chswitch_timer,
1260                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1261                                          cbss->beacon_interval));
1262         return;
1263  drop_connection:
1264         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1265         mutex_unlock(&local->chanctx_mtx);
1266         mutex_unlock(&local->mtx);
1267 }
1268
1269 static bool
1270 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1271                                  struct ieee80211_channel *channel,
1272                                  const u8 *country_ie, u8 country_ie_len,
1273                                  const u8 *pwr_constr_elem,
1274                                  int *chan_pwr, int *pwr_reduction)
1275 {
1276         struct ieee80211_country_ie_triplet *triplet;
1277         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1278         int i, chan_increment;
1279         bool have_chan_pwr = false;
1280
1281         /* Invalid IE */
1282         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1283                 return false;
1284
1285         triplet = (void *)(country_ie + 3);
1286         country_ie_len -= 3;
1287
1288         switch (channel->band) {
1289         default:
1290                 WARN_ON_ONCE(1);
1291                 /* fall through */
1292         case IEEE80211_BAND_2GHZ:
1293         case IEEE80211_BAND_60GHZ:
1294                 chan_increment = 1;
1295                 break;
1296         case IEEE80211_BAND_5GHZ:
1297                 chan_increment = 4;
1298                 break;
1299         }
1300
1301         /* find channel */
1302         while (country_ie_len >= 3) {
1303                 u8 first_channel = triplet->chans.first_channel;
1304
1305                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1306                         goto next;
1307
1308                 for (i = 0; i < triplet->chans.num_channels; i++) {
1309                         if (first_channel + i * chan_increment == chan) {
1310                                 have_chan_pwr = true;
1311                                 *chan_pwr = triplet->chans.max_power;
1312                                 break;
1313                         }
1314                 }
1315                 if (have_chan_pwr)
1316                         break;
1317
1318  next:
1319                 triplet++;
1320                 country_ie_len -= 3;
1321         }
1322
1323         if (have_chan_pwr && pwr_constr_elem)
1324                 *pwr_reduction = *pwr_constr_elem;
1325         else
1326                 *pwr_reduction = 0;
1327
1328         return have_chan_pwr;
1329 }
1330
1331 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1332                                       struct ieee80211_channel *channel,
1333                                       const u8 *cisco_dtpc_ie,
1334                                       int *pwr_level)
1335 {
1336         /* From practical testing, the first data byte of the DTPC element
1337          * seems to contain the requested dBm level, and the CLI on Cisco
1338          * APs clearly state the range is -127 to 127 dBm, which indicates
1339          * a signed byte, although it seemingly never actually goes negative.
1340          * The other byte seems to always be zero.
1341          */
1342         *pwr_level = (__s8)cisco_dtpc_ie[4];
1343 }
1344
1345 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1346                                        struct ieee80211_channel *channel,
1347                                        struct ieee80211_mgmt *mgmt,
1348                                        const u8 *country_ie, u8 country_ie_len,
1349                                        const u8 *pwr_constr_ie,
1350                                        const u8 *cisco_dtpc_ie)
1351 {
1352         bool has_80211h_pwr = false, has_cisco_pwr = false;
1353         int chan_pwr = 0, pwr_reduction_80211h = 0;
1354         int pwr_level_cisco, pwr_level_80211h;
1355         int new_ap_level;
1356         __le16 capab = mgmt->u.probe_resp.capab_info;
1357
1358         if (country_ie &&
1359             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1360              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1361                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1362                         sdata, channel, country_ie, country_ie_len,
1363                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1364                 pwr_level_80211h =
1365                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1366         }
1367
1368         if (cisco_dtpc_ie) {
1369                 ieee80211_find_cisco_dtpc(
1370                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1371                 has_cisco_pwr = true;
1372         }
1373
1374         if (!has_80211h_pwr && !has_cisco_pwr)
1375                 return 0;
1376
1377         /* If we have both 802.11h and Cisco DTPC, apply both limits
1378          * by picking the smallest of the two power levels advertised.
1379          */
1380         if (has_80211h_pwr &&
1381             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1382                 sdata_dbg(sdata,
1383                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1384                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1385                           sdata->u.mgd.bssid);
1386                 new_ap_level = pwr_level_80211h;
1387         } else {  /* has_cisco_pwr is always true here. */
1388                 sdata_dbg(sdata,
1389                           "Limiting TX power to %d dBm as advertised by %pM\n",
1390                           pwr_level_cisco, sdata->u.mgd.bssid);
1391                 new_ap_level = pwr_level_cisco;
1392         }
1393
1394         if (sdata->ap_power_level == new_ap_level)
1395                 return 0;
1396
1397         sdata->ap_power_level = new_ap_level;
1398         if (__ieee80211_recalc_txpower(sdata))
1399                 return BSS_CHANGED_TXPOWER;
1400         return 0;
1401 }
1402
1403 /* powersave */
1404 static void ieee80211_enable_ps(struct ieee80211_local *local,
1405                                 struct ieee80211_sub_if_data *sdata)
1406 {
1407         struct ieee80211_conf *conf = &local->hw.conf;
1408
1409         /*
1410          * If we are scanning right now then the parameters will
1411          * take effect when scan finishes.
1412          */
1413         if (local->scanning)
1414                 return;
1415
1416         if (conf->dynamic_ps_timeout > 0 &&
1417             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1418                 mod_timer(&local->dynamic_ps_timer, jiffies +
1419                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1420         } else {
1421                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1422                         ieee80211_send_nullfunc(local, sdata, true);
1423
1424                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1425                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1426                         return;
1427
1428                 conf->flags |= IEEE80211_CONF_PS;
1429                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1430         }
1431 }
1432
1433 static void ieee80211_change_ps(struct ieee80211_local *local)
1434 {
1435         struct ieee80211_conf *conf = &local->hw.conf;
1436
1437         if (local->ps_sdata) {
1438                 ieee80211_enable_ps(local, local->ps_sdata);
1439         } else if (conf->flags & IEEE80211_CONF_PS) {
1440                 conf->flags &= ~IEEE80211_CONF_PS;
1441                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1442                 del_timer_sync(&local->dynamic_ps_timer);
1443                 cancel_work_sync(&local->dynamic_ps_enable_work);
1444         }
1445 }
1446
1447 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1448 {
1449         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1450         struct sta_info *sta = NULL;
1451         bool authorized = false;
1452
1453         if (!mgd->powersave)
1454                 return false;
1455
1456         if (mgd->broken_ap)
1457                 return false;
1458
1459         if (!mgd->associated)
1460                 return false;
1461
1462         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1463                 return false;
1464
1465         if (!mgd->have_beacon)
1466                 return false;
1467
1468         rcu_read_lock();
1469         sta = sta_info_get(sdata, mgd->bssid);
1470         if (sta)
1471                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1472         rcu_read_unlock();
1473
1474         return authorized;
1475 }
1476
1477 /* need to hold RTNL or interface lock */
1478 void ieee80211_recalc_ps(struct ieee80211_local *local)
1479 {
1480         struct ieee80211_sub_if_data *sdata, *found = NULL;
1481         int count = 0;
1482         int timeout;
1483
1484         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1485                 local->ps_sdata = NULL;
1486                 return;
1487         }
1488
1489         list_for_each_entry(sdata, &local->interfaces, list) {
1490                 if (!ieee80211_sdata_running(sdata))
1491                         continue;
1492                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1493                         /* If an AP vif is found, then disable PS
1494                          * by setting the count to zero thereby setting
1495                          * ps_sdata to NULL.
1496                          */
1497                         count = 0;
1498                         break;
1499                 }
1500                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1501                         continue;
1502                 found = sdata;
1503                 count++;
1504         }
1505
1506         if (count == 1 && ieee80211_powersave_allowed(found)) {
1507                 u8 dtimper = found->u.mgd.dtim_period;
1508                 s32 beaconint_us;
1509
1510                 beaconint_us = ieee80211_tu_to_usec(
1511                                         found->vif.bss_conf.beacon_int);
1512
1513                 timeout = local->dynamic_ps_forced_timeout;
1514                 if (timeout < 0)
1515                         timeout = 100;
1516                 local->hw.conf.dynamic_ps_timeout = timeout;
1517
1518                 /* If the TIM IE is invalid, pretend the value is 1 */
1519                 if (!dtimper)
1520                         dtimper = 1;
1521
1522                 local->hw.conf.ps_dtim_period = dtimper;
1523                 local->ps_sdata = found;
1524         } else {
1525                 local->ps_sdata = NULL;
1526         }
1527
1528         ieee80211_change_ps(local);
1529 }
1530
1531 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1532 {
1533         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1534
1535         if (sdata->vif.bss_conf.ps != ps_allowed) {
1536                 sdata->vif.bss_conf.ps = ps_allowed;
1537                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1538         }
1539 }
1540
1541 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1542 {
1543         struct ieee80211_local *local =
1544                 container_of(work, struct ieee80211_local,
1545                              dynamic_ps_disable_work);
1546
1547         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1548                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1549                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550         }
1551
1552         ieee80211_wake_queues_by_reason(&local->hw,
1553                                         IEEE80211_MAX_QUEUE_MAP,
1554                                         IEEE80211_QUEUE_STOP_REASON_PS,
1555                                         false);
1556 }
1557
1558 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1559 {
1560         struct ieee80211_local *local =
1561                 container_of(work, struct ieee80211_local,
1562                              dynamic_ps_enable_work);
1563         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1564         struct ieee80211_if_managed *ifmgd;
1565         unsigned long flags;
1566         int q;
1567
1568         /* can only happen when PS was just disabled anyway */
1569         if (!sdata)
1570                 return;
1571
1572         ifmgd = &sdata->u.mgd;
1573
1574         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1575                 return;
1576
1577         if (local->hw.conf.dynamic_ps_timeout > 0) {
1578                 /* don't enter PS if TX frames are pending */
1579                 if (drv_tx_frames_pending(local)) {
1580                         mod_timer(&local->dynamic_ps_timer, jiffies +
1581                                   msecs_to_jiffies(
1582                                   local->hw.conf.dynamic_ps_timeout));
1583                         return;
1584                 }
1585
1586                 /*
1587                  * transmission can be stopped by others which leads to
1588                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1589                  * is not the actual idle state.
1590                  */
1591                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1592                 for (q = 0; q < local->hw.queues; q++) {
1593                         if (local->queue_stop_reasons[q]) {
1594                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1595                                                        flags);
1596                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1597                                           msecs_to_jiffies(
1598                                           local->hw.conf.dynamic_ps_timeout));
1599                                 return;
1600                         }
1601                 }
1602                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1603         }
1604
1605         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1606             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1607                 if (drv_tx_frames_pending(local)) {
1608                         mod_timer(&local->dynamic_ps_timer, jiffies +
1609                                   msecs_to_jiffies(
1610                                   local->hw.conf.dynamic_ps_timeout));
1611                 } else {
1612                         ieee80211_send_nullfunc(local, sdata, true);
1613                         /* Flush to get the tx status of nullfunc frame */
1614                         ieee80211_flush_queues(local, sdata, false);
1615                 }
1616         }
1617
1618         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1619               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1620             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1621                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1622                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1623                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1624         }
1625 }
1626
1627 void ieee80211_dynamic_ps_timer(unsigned long data)
1628 {
1629         struct ieee80211_local *local = (void *) data;
1630
1631         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1632 }
1633
1634 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1635 {
1636         struct delayed_work *delayed_work =
1637                 container_of(work, struct delayed_work, work);
1638         struct ieee80211_sub_if_data *sdata =
1639                 container_of(delayed_work, struct ieee80211_sub_if_data,
1640                              dfs_cac_timer_work);
1641         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1642
1643         mutex_lock(&sdata->local->mtx);
1644         if (sdata->wdev.cac_started) {
1645                 ieee80211_vif_release_channel(sdata);
1646                 cfg80211_cac_event(sdata->dev, &chandef,
1647                                    NL80211_RADAR_CAC_FINISHED,
1648                                    GFP_KERNEL);
1649         }
1650         mutex_unlock(&sdata->local->mtx);
1651 }
1652
1653 static bool
1654 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1655 {
1656         struct ieee80211_local *local = sdata->local;
1657         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658         bool ret = false;
1659         int ac;
1660
1661         if (local->hw.queues < IEEE80211_NUM_ACS)
1662                 return false;
1663
1664         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1665                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1666                 int non_acm_ac;
1667                 unsigned long now = jiffies;
1668
1669                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1670                     tx_tspec->admitted_time &&
1671                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1672                         tx_tspec->consumed_tx_time = 0;
1673                         tx_tspec->time_slice_start = now;
1674
1675                         if (tx_tspec->downgraded)
1676                                 tx_tspec->action =
1677                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1678                 }
1679
1680                 switch (tx_tspec->action) {
1681                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1682                         /* take the original parameters */
1683                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1684                                 sdata_err(sdata,
1685                                           "failed to set TX queue parameters for queue %d\n",
1686                                           ac);
1687                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688                         tx_tspec->downgraded = false;
1689                         ret = true;
1690                         break;
1691                 case TX_TSPEC_ACTION_DOWNGRADE:
1692                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1693                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694                                 ret = true;
1695                                 break;
1696                         }
1697                         /* downgrade next lower non-ACM AC */
1698                         for (non_acm_ac = ac + 1;
1699                              non_acm_ac < IEEE80211_NUM_ACS;
1700                              non_acm_ac++)
1701                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1702                                         break;
1703                         /* The loop will result in using BK even if it requires
1704                          * admission control, such configuration makes no sense
1705                          * and we have to transmit somehow - the AC selection
1706                          * does the same thing.
1707                          */
1708                         if (drv_conf_tx(local, sdata, ac,
1709                                         &sdata->tx_conf[non_acm_ac]))
1710                                 sdata_err(sdata,
1711                                           "failed to set TX queue parameters for queue %d\n",
1712                                           ac);
1713                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714                         ret = true;
1715                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1716                                 tx_tspec->time_slice_start + HZ - now + 1);
1717                         break;
1718                 case TX_TSPEC_ACTION_NONE:
1719                         /* nothing now */
1720                         break;
1721                 }
1722         }
1723
1724         return ret;
1725 }
1726
1727 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1728 {
1729         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1730                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1731 }
1732
1733 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1734 {
1735         struct ieee80211_sub_if_data *sdata;
1736
1737         sdata = container_of(work, struct ieee80211_sub_if_data,
1738                              u.mgd.tx_tspec_wk.work);
1739         ieee80211_sta_handle_tspec_ac_params(sdata);
1740 }
1741
1742 /* MLME */
1743 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1744                                      struct ieee80211_sub_if_data *sdata,
1745                                      const u8 *wmm_param, size_t wmm_param_len)
1746 {
1747         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1748         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1749         size_t left;
1750         int count, ac;
1751         const u8 *pos;
1752         u8 uapsd_queues = 0;
1753
1754         if (!local->ops->conf_tx)
1755                 return false;
1756
1757         if (local->hw.queues < IEEE80211_NUM_ACS)
1758                 return false;
1759
1760         if (!wmm_param)
1761                 return false;
1762
1763         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1764                 return false;
1765
1766         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1767                 uapsd_queues = ifmgd->uapsd_queues;
1768
1769         count = wmm_param[6] & 0x0f;
1770         if (count == ifmgd->wmm_last_param_set)
1771                 return false;
1772         ifmgd->wmm_last_param_set = count;
1773
1774         pos = wmm_param + 8;
1775         left = wmm_param_len - 8;
1776
1777         memset(&params, 0, sizeof(params));
1778
1779         sdata->wmm_acm = 0;
1780         for (; left >= 4; left -= 4, pos += 4) {
1781                 int aci = (pos[0] >> 5) & 0x03;
1782                 int acm = (pos[0] >> 4) & 0x01;
1783                 bool uapsd = false;
1784
1785                 switch (aci) {
1786                 case 1: /* AC_BK */
1787                         ac = IEEE80211_AC_BK;
1788                         if (acm)
1789                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1790                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1791                                 uapsd = true;
1792                         break;
1793                 case 2: /* AC_VI */
1794                         ac = IEEE80211_AC_VI;
1795                         if (acm)
1796                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1797                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1798                                 uapsd = true;
1799                         break;
1800                 case 3: /* AC_VO */
1801                         ac = IEEE80211_AC_VO;
1802                         if (acm)
1803                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1804                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1805                                 uapsd = true;
1806                         break;
1807                 case 0: /* AC_BE */
1808                 default:
1809                         ac = IEEE80211_AC_BE;
1810                         if (acm)
1811                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1812                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1813                                 uapsd = true;
1814                         break;
1815                 }
1816
1817                 params[ac].aifs = pos[0] & 0x0f;
1818
1819                 if (params[ac].aifs < 2) {
1820                         sdata_info(sdata,
1821                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1822                                    params[ac].aifs, aci);
1823                         params[ac].aifs = 2;
1824                 }
1825                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1826                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1827                 params[ac].txop = get_unaligned_le16(pos + 2);
1828                 params[ac].acm = acm;
1829                 params[ac].uapsd = uapsd;
1830
1831                 if (params[ac].cw_min > params[ac].cw_max) {
1832                         sdata_info(sdata,
1833                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1834                                    params[ac].cw_min, params[ac].cw_max, aci);
1835                         return false;
1836                 }
1837         }
1838
1839         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1840                 mlme_dbg(sdata,
1841                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1842                          ac, params[ac].acm,
1843                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1844                          params[ac].txop, params[ac].uapsd,
1845                          ifmgd->tx_tspec[ac].downgraded);
1846                 sdata->tx_conf[ac] = params[ac];
1847                 if (!ifmgd->tx_tspec[ac].downgraded &&
1848                     drv_conf_tx(local, sdata, ac, &params[ac]))
1849                         sdata_err(sdata,
1850                                   "failed to set TX queue parameters for AC %d\n",
1851                                   ac);
1852         }
1853
1854         /* enable WMM or activate new settings */
1855         sdata->vif.bss_conf.qos = true;
1856         return true;
1857 }
1858
1859 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1860 {
1861         lockdep_assert_held(&sdata->local->mtx);
1862
1863         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1864         ieee80211_run_deferred_scan(sdata->local);
1865 }
1866
1867 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1868 {
1869         mutex_lock(&sdata->local->mtx);
1870         __ieee80211_stop_poll(sdata);
1871         mutex_unlock(&sdata->local->mtx);
1872 }
1873
1874 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1875                                            u16 capab, bool erp_valid, u8 erp)
1876 {
1877         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1878         u32 changed = 0;
1879         bool use_protection;
1880         bool use_short_preamble;
1881         bool use_short_slot;
1882
1883         if (erp_valid) {
1884                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1885                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1886         } else {
1887                 use_protection = false;
1888                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1889         }
1890
1891         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1892         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1893                 use_short_slot = true;
1894
1895         if (use_protection != bss_conf->use_cts_prot) {
1896                 bss_conf->use_cts_prot = use_protection;
1897                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1898         }
1899
1900         if (use_short_preamble != bss_conf->use_short_preamble) {
1901                 bss_conf->use_short_preamble = use_short_preamble;
1902                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1903         }
1904
1905         if (use_short_slot != bss_conf->use_short_slot) {
1906                 bss_conf->use_short_slot = use_short_slot;
1907                 changed |= BSS_CHANGED_ERP_SLOT;
1908         }
1909
1910         return changed;
1911 }
1912
1913 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1914                                      struct cfg80211_bss *cbss,
1915                                      u32 bss_info_changed)
1916 {
1917         struct ieee80211_bss *bss = (void *)cbss->priv;
1918         struct ieee80211_local *local = sdata->local;
1919         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1920
1921         bss_info_changed |= BSS_CHANGED_ASSOC;
1922         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1923                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1924
1925         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1926                 beacon_loss_count * bss_conf->beacon_int));
1927
1928         sdata->u.mgd.associated = cbss;
1929         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1930
1931         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1932
1933         if (sdata->vif.p2p ||
1934             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1935                 const struct cfg80211_bss_ies *ies;
1936
1937                 rcu_read_lock();
1938                 ies = rcu_dereference(cbss->ies);
1939                 if (ies) {
1940                         int ret;
1941
1942                         ret = cfg80211_get_p2p_attr(
1943                                         ies->data, ies->len,
1944                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1945                                         (u8 *) &bss_conf->p2p_noa_attr,
1946                                         sizeof(bss_conf->p2p_noa_attr));
1947                         if (ret >= 2) {
1948                                 sdata->u.mgd.p2p_noa_index =
1949                                         bss_conf->p2p_noa_attr.index;
1950                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1951                         }
1952                 }
1953                 rcu_read_unlock();
1954         }
1955
1956         /* just to be sure */
1957         ieee80211_stop_poll(sdata);
1958
1959         ieee80211_led_assoc(local, 1);
1960
1961         if (sdata->u.mgd.have_beacon) {
1962                 /*
1963                  * If the AP is buggy we may get here with no DTIM period
1964                  * known, so assume it's 1 which is the only safe assumption
1965                  * in that case, although if the TIM IE is broken powersave
1966                  * probably just won't work at all.
1967                  */
1968                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1969                 bss_conf->beacon_rate = bss->beacon_rate;
1970                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1971         } else {
1972                 bss_conf->beacon_rate = NULL;
1973                 bss_conf->dtim_period = 0;
1974         }
1975
1976         bss_conf->assoc = 1;
1977
1978         /* Tell the driver to monitor connection quality (if supported) */
1979         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1980             bss_conf->cqm_rssi_thold)
1981                 bss_info_changed |= BSS_CHANGED_CQM;
1982
1983         /* Enable ARP filtering */
1984         if (bss_conf->arp_addr_cnt)
1985                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1986
1987         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1988
1989         mutex_lock(&local->iflist_mtx);
1990         ieee80211_recalc_ps(local);
1991         mutex_unlock(&local->iflist_mtx);
1992
1993         ieee80211_recalc_smps(sdata);
1994         ieee80211_recalc_ps_vif(sdata);
1995
1996         netif_carrier_on(sdata->dev);
1997 }
1998
1999 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2000                                    u16 stype, u16 reason, bool tx,
2001                                    u8 *frame_buf)
2002 {
2003         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2004         struct ieee80211_local *local = sdata->local;
2005         u32 changed = 0;
2006
2007         sdata_assert_lock(sdata);
2008
2009         if (WARN_ON_ONCE(tx && !frame_buf))
2010                 return;
2011
2012         if (WARN_ON(!ifmgd->associated))
2013                 return;
2014
2015         ieee80211_stop_poll(sdata);
2016
2017         ifmgd->associated = NULL;
2018         netif_carrier_off(sdata->dev);
2019
2020         /*
2021          * if we want to get out of ps before disassoc (why?) we have
2022          * to do it before sending disassoc, as otherwise the null-packet
2023          * won't be valid.
2024          */
2025         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2026                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2027                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2028         }
2029         local->ps_sdata = NULL;
2030
2031         /* disable per-vif ps */
2032         ieee80211_recalc_ps_vif(sdata);
2033
2034         /* make sure ongoing transmission finishes */
2035         synchronize_net();
2036
2037         /*
2038          * drop any frame before deauth/disassoc, this can be data or
2039          * management frame. Since we are disconnecting, we should not
2040          * insist sending these frames which can take time and delay
2041          * the disconnection and possible the roaming.
2042          */
2043         if (tx)
2044                 ieee80211_flush_queues(local, sdata, true);
2045
2046         /* deauthenticate/disassociate now */
2047         if (tx || frame_buf)
2048                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2049                                                reason, tx, frame_buf);
2050
2051         /* flush out frame - make sure the deauth was actually sent */
2052         if (tx)
2053                 ieee80211_flush_queues(local, sdata, false);
2054
2055         /* clear bssid only after building the needed mgmt frames */
2056         eth_zero_addr(ifmgd->bssid);
2057
2058         /* remove AP and TDLS peers */
2059         sta_info_flush(sdata);
2060
2061         /* finally reset all BSS / config parameters */
2062         changed |= ieee80211_reset_erp_info(sdata);
2063
2064         ieee80211_led_assoc(local, 0);
2065         changed |= BSS_CHANGED_ASSOC;
2066         sdata->vif.bss_conf.assoc = false;
2067
2068         ifmgd->p2p_noa_index = -1;
2069         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2070                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2071
2072         /* on the next assoc, re-program HT/VHT parameters */
2073         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2074         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2075         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2076         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2077         sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2078
2079         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2080
2081         del_timer_sync(&local->dynamic_ps_timer);
2082         cancel_work_sync(&local->dynamic_ps_enable_work);
2083
2084         /* Disable ARP filtering */
2085         if (sdata->vif.bss_conf.arp_addr_cnt)
2086                 changed |= BSS_CHANGED_ARP_FILTER;
2087
2088         sdata->vif.bss_conf.qos = false;
2089         changed |= BSS_CHANGED_QOS;
2090
2091         /* The BSSID (not really interesting) and HT changed */
2092         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2093         ieee80211_bss_info_change_notify(sdata, changed);
2094
2095         /* disassociated - set to defaults now */
2096         ieee80211_set_wmm_default(sdata, false, false);
2097
2098         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2099         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2100         del_timer_sync(&sdata->u.mgd.timer);
2101         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2102
2103         sdata->vif.bss_conf.dtim_period = 0;
2104         sdata->vif.bss_conf.beacon_rate = NULL;
2105
2106         ifmgd->have_beacon = false;
2107
2108         ifmgd->flags = 0;
2109         mutex_lock(&local->mtx);
2110         ieee80211_vif_release_channel(sdata);
2111
2112         sdata->vif.csa_active = false;
2113         ifmgd->csa_waiting_bcn = false;
2114         ifmgd->csa_ignored_same_chan = false;
2115         if (sdata->csa_block_tx) {
2116                 ieee80211_wake_vif_queues(local, sdata,
2117                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2118                 sdata->csa_block_tx = false;
2119         }
2120         mutex_unlock(&local->mtx);
2121
2122         /* existing TX TSPEC sessions no longer exist */
2123         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2124         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2125
2126         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2127 }
2128
2129 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2130                              struct ieee80211_hdr *hdr)
2131 {
2132         /*
2133          * We can postpone the mgd.timer whenever receiving unicast frames
2134          * from AP because we know that the connection is working both ways
2135          * at that time. But multicast frames (and hence also beacons) must
2136          * be ignored here, because we need to trigger the timer during
2137          * data idle periods for sending the periodic probe request to the
2138          * AP we're connected to.
2139          */
2140         if (is_multicast_ether_addr(hdr->addr1))
2141                 return;
2142
2143         ieee80211_sta_reset_conn_monitor(sdata);
2144 }
2145
2146 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2147 {
2148         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2149         struct ieee80211_local *local = sdata->local;
2150
2151         mutex_lock(&local->mtx);
2152         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2153                 goto out;
2154
2155         __ieee80211_stop_poll(sdata);
2156
2157         mutex_lock(&local->iflist_mtx);
2158         ieee80211_recalc_ps(local);
2159         mutex_unlock(&local->iflist_mtx);
2160
2161         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2162                 goto out;
2163
2164         /*
2165          * We've received a probe response, but are not sure whether
2166          * we have or will be receiving any beacons or data, so let's
2167          * schedule the timers again, just in case.
2168          */
2169         ieee80211_sta_reset_beacon_monitor(sdata);
2170
2171         mod_timer(&ifmgd->conn_mon_timer,
2172                   round_jiffies_up(jiffies +
2173                                    IEEE80211_CONNECTION_IDLE_TIME));
2174 out:
2175         mutex_unlock(&local->mtx);
2176 }
2177
2178 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2179                                            struct ieee80211_hdr *hdr,
2180                                            u16 tx_time)
2181 {
2182         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2183         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2184         int ac = ieee80211_ac_from_tid(tid);
2185         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2186         unsigned long now = jiffies;
2187
2188         if (likely(!tx_tspec->admitted_time))
2189                 return;
2190
2191         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2192                 tx_tspec->consumed_tx_time = 0;
2193                 tx_tspec->time_slice_start = now;
2194
2195                 if (tx_tspec->downgraded) {
2196                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2197                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2198                 }
2199         }
2200
2201         if (tx_tspec->downgraded)
2202                 return;
2203
2204         tx_tspec->consumed_tx_time += tx_time;
2205
2206         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2207                 tx_tspec->downgraded = true;
2208                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2209                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2210         }
2211 }
2212
2213 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2214                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2215 {
2216         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2217
2218         if (!ieee80211_is_data(hdr->frame_control))
2219             return;
2220
2221         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2222             sdata->u.mgd.probe_send_count > 0) {
2223                 if (ack)
2224                         ieee80211_sta_reset_conn_monitor(sdata);
2225                 else
2226                         sdata->u.mgd.nullfunc_failed = true;
2227                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2228                 return;
2229         }
2230
2231         if (ack)
2232                 ieee80211_sta_reset_conn_monitor(sdata);
2233 }
2234
2235 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2236 {
2237         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2238         const u8 *ssid;
2239         u8 *dst = ifmgd->associated->bssid;
2240         u8 unicast_limit = max(1, max_probe_tries - 3);
2241
2242         /*
2243          * Try sending broadcast probe requests for the last three
2244          * probe requests after the first ones failed since some
2245          * buggy APs only support broadcast probe requests.
2246          */
2247         if (ifmgd->probe_send_count >= unicast_limit)
2248                 dst = NULL;
2249
2250         /*
2251          * When the hardware reports an accurate Tx ACK status, it's
2252          * better to send a nullfunc frame instead of a probe request,
2253          * as it will kick us off the AP quickly if we aren't associated
2254          * anymore. The timeout will be reset if the frame is ACKed by
2255          * the AP.
2256          */
2257         ifmgd->probe_send_count++;
2258
2259         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2260                 ifmgd->nullfunc_failed = false;
2261                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2262         } else {
2263                 int ssid_len;
2264
2265                 rcu_read_lock();
2266                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2267                 if (WARN_ON_ONCE(ssid == NULL))
2268                         ssid_len = 0;
2269                 else
2270                         ssid_len = ssid[1];
2271
2272                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2273                                          ssid + 2, ssid_len, NULL,
2274                                          0, (u32) -1, true, 0,
2275                                          ifmgd->associated->channel, false);
2276                 rcu_read_unlock();
2277         }
2278
2279         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2280         run_again(sdata, ifmgd->probe_timeout);
2281 }
2282
2283 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2284                                    bool beacon)
2285 {
2286         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2287         bool already = false;
2288
2289         if (!ieee80211_sdata_running(sdata))
2290                 return;
2291
2292         sdata_lock(sdata);
2293
2294         if (!ifmgd->associated)
2295                 goto out;
2296
2297         mutex_lock(&sdata->local->mtx);
2298
2299         if (sdata->local->tmp_channel || sdata->local->scanning) {
2300                 mutex_unlock(&sdata->local->mtx);
2301                 goto out;
2302         }
2303
2304         if (beacon) {
2305                 mlme_dbg_ratelimited(sdata,
2306                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2307                                      beacon_loss_count);
2308
2309                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2310         }
2311
2312         /*
2313          * The driver/our work has already reported this event or the
2314          * connection monitoring has kicked in and we have already sent
2315          * a probe request. Or maybe the AP died and the driver keeps
2316          * reporting until we disassociate...
2317          *
2318          * In either case we have to ignore the current call to this
2319          * function (except for setting the correct probe reason bit)
2320          * because otherwise we would reset the timer every time and
2321          * never check whether we received a probe response!
2322          */
2323         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2324                 already = true;
2325
2326         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2327
2328         mutex_unlock(&sdata->local->mtx);
2329
2330         if (already)
2331                 goto out;
2332
2333         mutex_lock(&sdata->local->iflist_mtx);
2334         ieee80211_recalc_ps(sdata->local);
2335         mutex_unlock(&sdata->local->iflist_mtx);
2336
2337         ifmgd->probe_send_count = 0;
2338         ieee80211_mgd_probe_ap_send(sdata);
2339  out:
2340         sdata_unlock(sdata);
2341 }
2342
2343 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2344                                           struct ieee80211_vif *vif)
2345 {
2346         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2347         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348         struct cfg80211_bss *cbss;
2349         struct sk_buff *skb;
2350         const u8 *ssid;
2351         int ssid_len;
2352
2353         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2354                 return NULL;
2355
2356         sdata_assert_lock(sdata);
2357
2358         if (ifmgd->associated)
2359                 cbss = ifmgd->associated;
2360         else if (ifmgd->auth_data)
2361                 cbss = ifmgd->auth_data->bss;
2362         else if (ifmgd->assoc_data)
2363                 cbss = ifmgd->assoc_data->bss;
2364         else
2365                 return NULL;
2366
2367         rcu_read_lock();
2368         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2369         if (WARN_ON_ONCE(ssid == NULL))
2370                 ssid_len = 0;
2371         else
2372                 ssid_len = ssid[1];
2373
2374         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2375                                         (u32) -1, cbss->channel,
2376                                         ssid + 2, ssid_len,
2377                                         NULL, 0, true);
2378         rcu_read_unlock();
2379
2380         return skb;
2381 }
2382 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2383
2384 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2385                                         const u8 *buf, size_t len, bool tx,
2386                                         u16 reason)
2387 {
2388         struct ieee80211_event event = {
2389                 .type = MLME_EVENT,
2390                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2391                 .u.mlme.reason = reason,
2392         };
2393
2394         if (tx)
2395                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2396         else
2397                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2398
2399         drv_event_callback(sdata->local, sdata, &event);
2400 }
2401
2402 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2403 {
2404         struct ieee80211_local *local = sdata->local;
2405         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2406         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2407
2408         sdata_lock(sdata);
2409         if (!ifmgd->associated) {
2410                 sdata_unlock(sdata);
2411                 return;
2412         }
2413
2414         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2415                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2416                                true, frame_buf);
2417         mutex_lock(&local->mtx);
2418         sdata->vif.csa_active = false;
2419         ifmgd->csa_waiting_bcn = false;
2420         if (sdata->csa_block_tx) {
2421                 ieee80211_wake_vif_queues(local, sdata,
2422                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2423                 sdata->csa_block_tx = false;
2424         }
2425         mutex_unlock(&local->mtx);
2426
2427         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2428                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2429
2430         sdata_unlock(sdata);
2431 }
2432
2433 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2434 {
2435         struct ieee80211_sub_if_data *sdata =
2436                 container_of(work, struct ieee80211_sub_if_data,
2437                              u.mgd.beacon_connection_loss_work);
2438         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2439
2440         if (ifmgd->associated)
2441                 ifmgd->beacon_loss_count++;
2442
2443         if (ifmgd->connection_loss) {
2444                 sdata_info(sdata, "Connection to AP %pM lost\n",
2445                            ifmgd->bssid);
2446                 __ieee80211_disconnect(sdata);
2447         } else {
2448                 ieee80211_mgd_probe_ap(sdata, true);
2449         }
2450 }
2451
2452 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2453 {
2454         struct ieee80211_sub_if_data *sdata =
2455                 container_of(work, struct ieee80211_sub_if_data,
2456                              u.mgd.csa_connection_drop_work);
2457
2458         __ieee80211_disconnect(sdata);
2459 }
2460
2461 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2462 {
2463         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2464         struct ieee80211_hw *hw = &sdata->local->hw;
2465
2466         trace_api_beacon_loss(sdata);
2467
2468         sdata->u.mgd.connection_loss = false;
2469         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2470 }
2471 EXPORT_SYMBOL(ieee80211_beacon_loss);
2472
2473 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2474 {
2475         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2476         struct ieee80211_hw *hw = &sdata->local->hw;
2477
2478         trace_api_connection_loss(sdata);
2479
2480         sdata->u.mgd.connection_loss = true;
2481         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2482 }
2483 EXPORT_SYMBOL(ieee80211_connection_loss);
2484
2485
2486 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2487                                         bool assoc)
2488 {
2489         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2490
2491         sdata_assert_lock(sdata);
2492
2493         if (!assoc) {
2494                 /*
2495                  * we are not authenticated yet, the only timer that could be
2496                  * running is the timeout for the authentication response which
2497                  * which is not relevant anymore.
2498                  */
2499                 del_timer_sync(&sdata->u.mgd.timer);
2500                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2501
2502                 eth_zero_addr(sdata->u.mgd.bssid);
2503                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2504                 sdata->u.mgd.flags = 0;
2505                 mutex_lock(&sdata->local->mtx);
2506                 ieee80211_vif_release_channel(sdata);
2507                 mutex_unlock(&sdata->local->mtx);
2508         }
2509
2510         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2511         kfree(auth_data);
2512         sdata->u.mgd.auth_data = NULL;
2513 }
2514
2515 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2516                                          bool assoc)
2517 {
2518         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2519
2520         sdata_assert_lock(sdata);
2521
2522         if (!assoc) {
2523                 /*
2524                  * we are not associated yet, the only timer that could be
2525                  * running is the timeout for the association response which
2526                  * which is not relevant anymore.
2527                  */
2528                 del_timer_sync(&sdata->u.mgd.timer);
2529                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2530
2531                 eth_zero_addr(sdata->u.mgd.bssid);
2532                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2533                 sdata->u.mgd.flags = 0;
2534                 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2535                 mutex_lock(&sdata->local->mtx);
2536                 ieee80211_vif_release_channel(sdata);
2537                 mutex_unlock(&sdata->local->mtx);
2538         }
2539
2540         kfree(assoc_data);
2541         sdata->u.mgd.assoc_data = NULL;
2542 }
2543
2544 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2545                                      struct ieee80211_mgmt *mgmt, size_t len)
2546 {
2547         struct ieee80211_local *local = sdata->local;
2548         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2549         u8 *pos;
2550         struct ieee802_11_elems elems;
2551         u32 tx_flags = 0;
2552
2553         pos = mgmt->u.auth.variable;
2554         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2555         if (!elems.challenge)
2556                 return;
2557         auth_data->expected_transaction = 4;
2558         drv_mgd_prepare_tx(sdata->local, sdata);
2559         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2560                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2561                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2562         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2563                             elems.challenge - 2, elems.challenge_len + 2,
2564                             auth_data->bss->bssid, auth_data->bss->bssid,
2565                             auth_data->key, auth_data->key_len,
2566                             auth_data->key_idx, tx_flags);
2567 }
2568
2569 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2570                                    struct ieee80211_mgmt *mgmt, size_t len)
2571 {
2572         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2573         u8 bssid[ETH_ALEN];
2574         u16 auth_alg, auth_transaction, status_code;
2575         struct sta_info *sta;
2576         struct ieee80211_event event = {
2577                 .type = MLME_EVENT,
2578                 .u.mlme.data = AUTH_EVENT,
2579         };
2580
2581         sdata_assert_lock(sdata);
2582
2583         if (len < 24 + 6)
2584                 return;
2585
2586         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2587                 return;
2588
2589         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2590
2591         if (!ether_addr_equal(bssid, mgmt->bssid))
2592                 return;
2593
2594         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2595         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2596         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2597
2598         if (auth_alg != ifmgd->auth_data->algorithm ||
2599             auth_transaction != ifmgd->auth_data->expected_transaction) {
2600                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2601                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2602                            auth_transaction,
2603                            ifmgd->auth_data->expected_transaction);
2604                 return;
2605         }
2606
2607         if (status_code != WLAN_STATUS_SUCCESS) {
2608                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2609                            mgmt->sa, status_code);
2610                 ieee80211_destroy_auth_data(sdata, false);
2611                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2612                 event.u.mlme.status = MLME_DENIED;
2613                 event.u.mlme.reason = status_code;
2614                 drv_event_callback(sdata->local, sdata, &event);
2615                 return;
2616         }
2617
2618         switch (ifmgd->auth_data->algorithm) {
2619         case WLAN_AUTH_OPEN:
2620         case WLAN_AUTH_LEAP:
2621         case WLAN_AUTH_FT:
2622         case WLAN_AUTH_SAE:
2623                 break;
2624         case WLAN_AUTH_SHARED_KEY:
2625                 if (ifmgd->auth_data->expected_transaction != 4) {
2626                         ieee80211_auth_challenge(sdata, mgmt, len);
2627                         /* need another frame */
2628                         return;
2629                 }
2630                 break;
2631         default:
2632                 WARN_ONCE(1, "invalid auth alg %d",
2633                           ifmgd->auth_data->algorithm);
2634                 return;
2635         }
2636
2637         event.u.mlme.status = MLME_SUCCESS;
2638         drv_event_callback(sdata->local, sdata, &event);
2639         sdata_info(sdata, "authenticated\n");
2640         ifmgd->auth_data->done = true;
2641         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2642         ifmgd->auth_data->timeout_started = true;
2643         run_again(sdata, ifmgd->auth_data->timeout);
2644
2645         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2646             ifmgd->auth_data->expected_transaction != 2) {
2647                 /*
2648                  * Report auth frame to user space for processing since another
2649                  * round of Authentication frames is still needed.
2650                  */
2651                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2652                 return;
2653         }
2654
2655         /* move station state to auth */
2656         mutex_lock(&sdata->local->sta_mtx);
2657         sta = sta_info_get(sdata, bssid);
2658         if (!sta) {
2659                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2660                 goto out_err;
2661         }
2662         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2663                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2664                 goto out_err;
2665         }
2666         mutex_unlock(&sdata->local->sta_mtx);
2667
2668         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2669         return;
2670  out_err:
2671         mutex_unlock(&sdata->local->sta_mtx);
2672         /* ignore frame -- wait for timeout */
2673 }
2674
2675 #define case_WLAN(type) \
2676         case WLAN_REASON_##type: return #type
2677
2678 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2679 {
2680         switch (reason_code) {
2681         case_WLAN(UNSPECIFIED);
2682         case_WLAN(PREV_AUTH_NOT_VALID);
2683         case_WLAN(DEAUTH_LEAVING);
2684         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2685         case_WLAN(DISASSOC_AP_BUSY);
2686         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2687         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2688         case_WLAN(DISASSOC_STA_HAS_LEFT);
2689         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2690         case_WLAN(DISASSOC_BAD_POWER);
2691         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2692         case_WLAN(INVALID_IE);
2693         case_WLAN(MIC_FAILURE);
2694         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2695         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2696         case_WLAN(IE_DIFFERENT);
2697         case_WLAN(INVALID_GROUP_CIPHER);
2698         case_WLAN(INVALID_PAIRWISE_CIPHER);
2699         case_WLAN(INVALID_AKMP);
2700         case_WLAN(UNSUPP_RSN_VERSION);
2701         case_WLAN(INVALID_RSN_IE_CAP);
2702         case_WLAN(IEEE8021X_FAILED);
2703         case_WLAN(CIPHER_SUITE_REJECTED);
2704         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2705         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2706         case_WLAN(DISASSOC_LOW_ACK);
2707         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2708         case_WLAN(QSTA_LEAVE_QBSS);
2709         case_WLAN(QSTA_NOT_USE);
2710         case_WLAN(QSTA_REQUIRE_SETUP);
2711         case_WLAN(QSTA_TIMEOUT);
2712         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2713         case_WLAN(MESH_PEER_CANCELED);
2714         case_WLAN(MESH_MAX_PEERS);
2715         case_WLAN(MESH_CONFIG);
2716         case_WLAN(MESH_CLOSE);
2717         case_WLAN(MESH_MAX_RETRIES);
2718         case_WLAN(MESH_CONFIRM_TIMEOUT);
2719         case_WLAN(MESH_INVALID_GTK);
2720         case_WLAN(MESH_INCONSISTENT_PARAM);
2721         case_WLAN(MESH_INVALID_SECURITY);
2722         case_WLAN(MESH_PATH_ERROR);
2723         case_WLAN(MESH_PATH_NOFORWARD);
2724         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2725         case_WLAN(MAC_EXISTS_IN_MBSS);
2726         case_WLAN(MESH_CHAN_REGULATORY);
2727         case_WLAN(MESH_CHAN);
2728         default: return "<unknown>";
2729         }
2730 }
2731
2732 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2733                                      struct ieee80211_mgmt *mgmt, size_t len)
2734 {
2735         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2736         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2737
2738         sdata_assert_lock(sdata);
2739
2740         if (len < 24 + 2)
2741                 return;
2742
2743         if (ifmgd->associated &&
2744             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2745                 const u8 *bssid = ifmgd->associated->bssid;
2746
2747                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2748                            bssid, reason_code,
2749                            ieee80211_get_reason_code_string(reason_code));
2750
2751                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2752
2753                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2754                                             reason_code);
2755                 return;
2756         }
2757
2758         if (ifmgd->assoc_data &&
2759             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2760                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2761
2762                 sdata_info(sdata,
2763                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2764                            bssid, reason_code,
2765                            ieee80211_get_reason_code_string(reason_code));
2766
2767                 ieee80211_destroy_assoc_data(sdata, false);
2768
2769                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2770                 return;
2771         }
2772 }
2773
2774
2775 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2776                                        struct ieee80211_mgmt *mgmt, size_t len)
2777 {
2778         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2779         u16 reason_code;
2780
2781         sdata_assert_lock(sdata);
2782
2783         if (len < 24 + 2)
2784                 return;
2785
2786         if (!ifmgd->associated ||
2787             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2788                 return;
2789
2790         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2791
2792         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2793                    mgmt->sa, reason_code);
2794
2795         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2796
2797         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2798 }
2799
2800 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2801                                 u8 *supp_rates, unsigned int supp_rates_len,
2802                                 u32 *rates, u32 *basic_rates,
2803                                 bool *have_higher_than_11mbit,
2804                                 int *min_rate, int *min_rate_index,
2805                                 int shift, u32 rate_flags)
2806 {
2807         int i, j;
2808
2809         for (i = 0; i < supp_rates_len; i++) {
2810                 int rate = supp_rates[i] & 0x7f;
2811                 bool is_basic = !!(supp_rates[i] & 0x80);
2812
2813                 if ((rate * 5 * (1 << shift)) > 110)
2814                         *have_higher_than_11mbit = true;
2815
2816                 /*
2817                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2818                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2819                  *
2820                  * Note: Even through the membership selector and the basic
2821                  *       rate flag share the same bit, they are not exactly
2822                  *       the same.
2823                  */
2824                 if (!!(supp_rates[i] & 0x80) &&
2825                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2826                         continue;
2827
2828                 for (j = 0; j < sband->n_bitrates; j++) {
2829                         struct ieee80211_rate *br;
2830                         int brate;
2831
2832                         br = &sband->bitrates[j];
2833                         if ((rate_flags & br->flags) != rate_flags)
2834                                 continue;
2835
2836                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2837                         if (brate == rate) {
2838                                 *rates |= BIT(j);
2839                                 if (is_basic)
2840                                         *basic_rates |= BIT(j);
2841                                 if ((rate * 5) < *min_rate) {
2842                                         *min_rate = rate * 5;
2843                                         *min_rate_index = j;
2844                                 }
2845                                 break;
2846                         }
2847                 }
2848         }
2849 }
2850
2851 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2852                                     struct cfg80211_bss *cbss,
2853                                     struct ieee80211_mgmt *mgmt, size_t len)
2854 {
2855         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2856         struct ieee80211_local *local = sdata->local;
2857         struct ieee80211_supported_band *sband;
2858         struct sta_info *sta;
2859         u8 *pos;
2860         u16 capab_info, aid;
2861         struct ieee802_11_elems elems;
2862         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2863         const struct cfg80211_bss_ies *bss_ies = NULL;
2864         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2865         u32 changed = 0;
2866         int err;
2867         bool ret;
2868
2869         /* AssocResp and ReassocResp have identical structure */
2870
2871         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2872         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2873
2874         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2875                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2876                            aid);
2877         aid &= ~(BIT(15) | BIT(14));
2878
2879         ifmgd->broken_ap = false;
2880
2881         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2882                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2883                            aid);
2884                 aid = 0;
2885                 ifmgd->broken_ap = true;
2886         }
2887
2888         pos = mgmt->u.assoc_resp.variable;
2889         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2890
2891         if (!elems.supp_rates) {
2892                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2893                 return false;
2894         }
2895
2896         ifmgd->aid = aid;
2897         ifmgd->tdls_chan_switch_prohibited =
2898                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2899                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2900
2901         /*
2902          * Some APs are erroneously not including some information in their
2903          * (re)association response frames. Try to recover by using the data
2904          * from the beacon or probe response. This seems to afflict mobile
2905          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2906          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2907          */
2908         if ((assoc_data->wmm && !elems.wmm_param) ||
2909             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2910              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2911             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2912              (!elems.vht_cap_elem || !elems.vht_operation))) {
2913                 const struct cfg80211_bss_ies *ies;
2914                 struct ieee802_11_elems bss_elems;
2915
2916                 rcu_read_lock();
2917                 ies = rcu_dereference(cbss->ies);
2918                 if (ies)
2919                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2920                                           GFP_ATOMIC);
2921                 rcu_read_unlock();
2922                 if (!bss_ies)
2923                         return false;
2924
2925                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2926                                        false, &bss_elems);
2927                 if (assoc_data->wmm &&
2928                     !elems.wmm_param && bss_elems.wmm_param) {
2929                         elems.wmm_param = bss_elems.wmm_param;
2930                         sdata_info(sdata,
2931                                    "AP bug: WMM param missing from AssocResp\n");
2932                 }
2933
2934                 /*
2935                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2936                  * have to include the IEs in the (re)association response.
2937                  */
2938                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2939                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2940                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2941                         sdata_info(sdata,
2942                                    "AP bug: HT capability missing from AssocResp\n");
2943                 }
2944                 if (!elems.ht_operation && bss_elems.ht_operation &&
2945                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2946                         elems.ht_operation = bss_elems.ht_operation;
2947                         sdata_info(sdata,
2948                                    "AP bug: HT operation missing from AssocResp\n");
2949                 }
2950                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2951                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2952                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2953                         sdata_info(sdata,
2954                                    "AP bug: VHT capa missing from AssocResp\n");
2955                 }
2956                 if (!elems.vht_operation && bss_elems.vht_operation &&
2957                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2958                         elems.vht_operation = bss_elems.vht_operation;
2959                         sdata_info(sdata,
2960                                    "AP bug: VHT operation missing from AssocResp\n");
2961                 }
2962         }
2963
2964         /*
2965          * We previously checked these in the beacon/probe response, so
2966          * they should be present here. This is just a safety net.
2967          */
2968         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2969             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2970                 sdata_info(sdata,
2971                            "HT AP is missing WMM params or HT capability/operation\n");
2972                 ret = false;
2973                 goto out;
2974         }
2975
2976         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2977             (!elems.vht_cap_elem || !elems.vht_operation)) {
2978                 sdata_info(sdata,
2979                            "VHT AP is missing VHT capability/operation\n");
2980                 ret = false;
2981                 goto out;
2982         }
2983
2984         mutex_lock(&sdata->local->sta_mtx);
2985         /*
2986          * station info was already allocated and inserted before
2987          * the association and should be available to us
2988          */
2989         sta = sta_info_get(sdata, cbss->bssid);
2990         if (WARN_ON(!sta)) {
2991                 mutex_unlock(&sdata->local->sta_mtx);
2992                 ret = false;
2993                 goto out;
2994         }
2995
2996         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2997
2998         /* Set up internal HT/VHT capabilities */
2999         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3000                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3001                                                   elems.ht_cap_elem, sta);
3002
3003         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3004                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3005                                                     elems.vht_cap_elem, sta);
3006
3007         /*
3008          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3009          * in their association response, so ignore that data for our own
3010          * configuration. If it changed since the last beacon, we'll get the
3011          * next beacon and update then.
3012          */
3013
3014         /*
3015          * If an operating mode notification IE is present, override the
3016          * NSS calculation (that would be done in rate_control_rate_init())
3017          * and use the # of streams from that element.
3018          */
3019         if (elems.opmode_notif &&
3020             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3021                 u8 nss;
3022
3023                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3024                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3025                 nss += 1;
3026                 sta->sta.rx_nss = nss;
3027         }
3028
3029         rate_control_rate_init(sta);
3030
3031         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3032                 set_sta_flag(sta, WLAN_STA_MFP);
3033                 sta->sta.mfp = true;
3034         } else {
3035                 sta->sta.mfp = false;
3036         }
3037
3038         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3039
3040         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3041         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3042                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3043         if (err) {
3044                 sdata_info(sdata,
3045                            "failed to move station %pM to desired state\n",
3046                            sta->sta.addr);
3047                 WARN_ON(__sta_info_destroy(sta));
3048                 mutex_unlock(&sdata->local->sta_mtx);
3049                 ret = false;
3050                 goto out;
3051         }
3052
3053         mutex_unlock(&sdata->local->sta_mtx);
3054
3055         /*
3056          * Always handle WMM once after association regardless
3057          * of the first value the AP uses. Setting -1 here has
3058          * that effect because the AP values is an unsigned
3059          * 4-bit value.
3060          */
3061         ifmgd->wmm_last_param_set = -1;
3062
3063         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3064                 ieee80211_set_wmm_default(sdata, false, false);
3065         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3066                                              elems.wmm_param_len)) {
3067                 /* still enable QoS since we might have HT/VHT */
3068                 ieee80211_set_wmm_default(sdata, false, true);
3069                 /* set the disable-WMM flag in this case to disable
3070                  * tracking WMM parameter changes in the beacon if
3071                  * the parameters weren't actually valid. Doing so
3072                  * avoids changing parameters very strangely when
3073                  * the AP is going back and forth between valid and
3074                  * invalid parameters.
3075                  */
3076                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3077         }
3078         changed |= BSS_CHANGED_QOS;
3079
3080         /* set AID and assoc capability,
3081          * ieee80211_set_associated() will tell the driver */
3082         bss_conf->aid = aid;
3083         bss_conf->assoc_capability = capab_info;
3084         ieee80211_set_associated(sdata, cbss, changed);
3085
3086         /*
3087          * If we're using 4-addr mode, let the AP know that we're
3088          * doing so, so that it can create the STA VLAN on its side
3089          */
3090         if (ifmgd->use_4addr)
3091                 ieee80211_send_4addr_nullfunc(local, sdata);
3092
3093         /*
3094          * Start timer to probe the connection to the AP now.
3095          * Also start the timer that will detect beacon loss.
3096          */
3097         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3098         ieee80211_sta_reset_beacon_monitor(sdata);
3099
3100         ret = true;
3101  out:
3102         kfree(bss_ies);
3103         return ret;
3104 }
3105
3106 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3107                                          struct ieee80211_mgmt *mgmt,
3108                                          size_t len)
3109 {
3110         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3111         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3112         u16 capab_info, status_code, aid;
3113         struct ieee802_11_elems elems;
3114         int ac, uapsd_queues = -1;
3115         u8 *pos;
3116         bool reassoc;
3117         struct cfg80211_bss *bss;
3118         struct ieee80211_event event = {
3119                 .type = MLME_EVENT,
3120                 .u.mlme.data = ASSOC_EVENT,
3121         };
3122
3123         sdata_assert_lock(sdata);
3124
3125         if (!assoc_data)
3126                 return;
3127         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3128                 return;
3129
3130         /*
3131          * AssocResp and ReassocResp have identical structure, so process both
3132          * of them in this function.
3133          */
3134
3135         if (len < 24 + 6)
3136                 return;
3137
3138         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3139         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3140         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3141         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3142
3143         sdata_info(sdata,
3144                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3145                    reassoc ? "Rea" : "A", mgmt->sa,
3146                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3147
3148         pos = mgmt->u.assoc_resp.variable;
3149         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3150
3151         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3152             elems.timeout_int &&
3153             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3154                 u32 tu, ms;
3155                 tu = le32_to_cpu(elems.timeout_int->value);
3156                 ms = tu * 1024 / 1000;
3157                 sdata_info(sdata,
3158                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3159                            mgmt->sa, tu, ms);
3160                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3161                 assoc_data->timeout_started = true;
3162                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3163                         run_again(sdata, assoc_data->timeout);
3164                 return;
3165         }
3166
3167         bss = assoc_data->bss;
3168
3169         if (status_code != WLAN_STATUS_SUCCESS) {
3170                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3171                            mgmt->sa, status_code);
3172                 ieee80211_destroy_assoc_data(sdata, false);
3173                 event.u.mlme.status = MLME_DENIED;
3174                 event.u.mlme.reason = status_code;
3175                 drv_event_callback(sdata->local, sdata, &event);
3176         } else {
3177                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3178                         /* oops -- internal error -- send timeout for now */
3179                         ieee80211_destroy_assoc_data(sdata, false);
3180                         cfg80211_assoc_timeout(sdata->dev, bss);
3181                         return;
3182                 }
3183                 event.u.mlme.status = MLME_SUCCESS;
3184                 drv_event_callback(sdata->local, sdata, &event);
3185                 sdata_info(sdata, "associated\n");
3186
3187                 /*
3188                  * destroy assoc_data afterwards, as otherwise an idle
3189                  * recalc after assoc_data is NULL but before associated
3190                  * is set can cause the interface to go idle
3191                  */
3192                 ieee80211_destroy_assoc_data(sdata, true);
3193
3194                 /* get uapsd queues configuration */
3195                 uapsd_queues = 0;
3196                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3197                         if (sdata->tx_conf[ac].uapsd)
3198                                 uapsd_queues |= BIT(ac);
3199         }
3200
3201         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3202 }
3203
3204 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3205                                   struct ieee80211_mgmt *mgmt, size_t len,
3206                                   struct ieee80211_rx_status *rx_status,
3207                                   struct ieee802_11_elems *elems)
3208 {
3209         struct ieee80211_local *local = sdata->local;
3210         struct ieee80211_bss *bss;
3211         struct ieee80211_channel *channel;
3212
3213         sdata_assert_lock(sdata);
3214
3215         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3216         if (!channel)
3217                 return;
3218
3219         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3220                                         channel);
3221         if (bss) {
3222                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3223                 ieee80211_rx_bss_put(local, bss);
3224         }
3225 }
3226
3227
3228 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3229                                          struct sk_buff *skb)
3230 {
3231         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3232         struct ieee80211_if_managed *ifmgd;
3233         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3234         size_t baselen, len = skb->len;
3235         struct ieee802_11_elems elems;
3236
3237         ifmgd = &sdata->u.mgd;
3238
3239         sdata_assert_lock(sdata);
3240
3241         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3242                 return; /* ignore ProbeResp to foreign address */
3243
3244         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3245         if (baselen > len)
3246                 return;
3247
3248         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3249                                false, &elems);
3250
3251         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3252
3253         if (ifmgd->associated &&
3254             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3255                 ieee80211_reset_ap_probe(sdata);
3256 }
3257
3258 /*
3259  * This is the canonical list of information elements we care about,
3260  * the filter code also gives us all changes to the Microsoft OUI
3261  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3262  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3263  * changes to requested client power.
3264  *
3265  * We implement beacon filtering in software since that means we can
3266  * avoid processing the frame here and in cfg80211, and userspace
3267  * will not be able to tell whether the hardware supports it or not.
3268  *
3269  * XXX: This list needs to be dynamic -- userspace needs to be able to
3270  *      add items it requires. It also needs to be able to tell us to
3271  *      look out for other vendor IEs.
3272  */
3273 static const u64 care_about_ies =
3274         (1ULL << WLAN_EID_COUNTRY) |
3275         (1ULL << WLAN_EID_ERP_INFO) |
3276         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3277         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3278         (1ULL << WLAN_EID_HT_CAPABILITY) |
3279         (1ULL << WLAN_EID_HT_OPERATION) |
3280         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3281
3282 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3283                                      struct ieee80211_mgmt *mgmt, size_t len,
3284                                      struct ieee80211_rx_status *rx_status)
3285 {
3286         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3287         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3288         size_t baselen;
3289         struct ieee802_11_elems elems;
3290         struct ieee80211_local *local = sdata->local;
3291         struct ieee80211_chanctx_conf *chanctx_conf;
3292         struct ieee80211_channel *chan;
3293         struct sta_info *sta;
3294         u32 changed = 0;
3295         bool erp_valid;
3296         u8 erp_value = 0;
3297         u32 ncrc;
3298         u8 *bssid;
3299         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3300
3301         sdata_assert_lock(sdata);
3302
3303         /* Process beacon from the current BSS */
3304         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3305         if (baselen > len)
3306                 return;
3307
3308         rcu_read_lock();
3309         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3310         if (!chanctx_conf) {
3311                 rcu_read_unlock();
3312                 return;
3313         }
3314
3315         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3316                 rcu_read_unlock();
3317                 return;
3318         }
3319         chan = chanctx_conf->def.chan;
3320         rcu_read_unlock();
3321
3322         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3323             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3324                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3325                                        len - baselen, false, &elems);
3326
3327                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3328                 if (elems.tim && !elems.parse_error) {
3329                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3330                         ifmgd->dtim_period = tim_ie->dtim_period;
3331                 }
3332                 ifmgd->have_beacon = true;
3333                 ifmgd->assoc_data->need_beacon = false;
3334                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3335                         sdata->vif.bss_conf.sync_tsf =
3336                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3337                         sdata->vif.bss_conf.sync_device_ts =
3338                                 rx_status->device_timestamp;
3339                         if (elems.tim)
3340                                 sdata->vif.bss_conf.sync_dtim_count =
3341                                         elems.tim->dtim_count;
3342                         else
3343                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3344                 }
3345                 /* continue assoc process */
3346                 ifmgd->assoc_data->timeout = jiffies;
3347                 ifmgd->assoc_data->timeout_started = true;
3348                 run_again(sdata, ifmgd->assoc_data->timeout);
3349                 return;
3350         }
3351
3352         if (!ifmgd->associated ||
3353             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3354                 return;
3355         bssid = ifmgd->associated->bssid;
3356
3357         /* Track average RSSI from the Beacon frames of the current AP */
3358         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3359                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3360                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3361                 ifmgd->last_cqm_event_signal = 0;
3362                 ifmgd->count_beacon_signal = 1;
3363                 ifmgd->last_ave_beacon_signal = 0;
3364         } else {
3365                 ifmgd->count_beacon_signal++;
3366         }
3367
3368         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3369
3370         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3371             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3372                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3373                 int last_sig = ifmgd->last_ave_beacon_signal;
3374                 struct ieee80211_event event = {
3375                         .type = RSSI_EVENT,
3376                 };
3377
3378                 /*
3379                  * if signal crosses either of the boundaries, invoke callback
3380                  * with appropriate parameters
3381                  */
3382                 if (sig > ifmgd->rssi_max_thold &&
3383                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3384                         ifmgd->last_ave_beacon_signal = sig;
3385                         event.u.rssi.data = RSSI_EVENT_HIGH;
3386                         drv_event_callback(local, sdata, &event);
3387                 } else if (sig < ifmgd->rssi_min_thold &&
3388                            (last_sig >= ifmgd->rssi_max_thold ||
3389                            last_sig == 0)) {
3390                         ifmgd->last_ave_beacon_signal = sig;
3391                         event.u.rssi.data = RSSI_EVENT_LOW;
3392                         drv_event_callback(local, sdata, &event);
3393                 }
3394         }
3395
3396         if (bss_conf->cqm_rssi_thold &&
3397             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3398             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3399                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3400                 int last_event = ifmgd->last_cqm_event_signal;
3401                 int thold = bss_conf->cqm_rssi_thold;
3402                 int hyst = bss_conf->cqm_rssi_hyst;
3403
3404                 if (sig < thold &&
3405                     (last_event == 0 || sig < last_event - hyst)) {
3406                         ifmgd->last_cqm_event_signal = sig;
3407                         ieee80211_cqm_rssi_notify(
3408                                 &sdata->vif,
3409                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3410                                 GFP_KERNEL);
3411                 } else if (sig > thold &&
3412                            (last_event == 0 || sig > last_event + hyst)) {
3413                         ifmgd->last_cqm_event_signal = sig;
3414                         ieee80211_cqm_rssi_notify(
3415                                 &sdata->vif,
3416                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3417                                 GFP_KERNEL);
3418                 }
3419         }
3420
3421         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3422                 mlme_dbg_ratelimited(sdata,
3423                                      "cancelling AP probe due to a received beacon\n");
3424                 ieee80211_reset_ap_probe(sdata);
3425         }
3426
3427         /*
3428          * Push the beacon loss detection into the future since
3429          * we are processing a beacon from the AP just now.
3430          */
3431         ieee80211_sta_reset_beacon_monitor(sdata);
3432
3433         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3434         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3435                                           len - baselen, false, &elems,
3436                                           care_about_ies, ncrc);
3437
3438         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3439             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3440                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3441                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3442                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3443                                 ieee80211_hw_config(local,
3444                                                     IEEE80211_CONF_CHANGE_PS);
3445                         }
3446                         ieee80211_send_nullfunc(local, sdata, false);
3447                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3448                         local->pspolling = true;
3449
3450                         /*
3451                          * Here is assumed that the driver will be
3452                          * able to send ps-poll frame and receive a
3453                          * response even though power save mode is
3454                          * enabled, but some drivers might require
3455                          * to disable power save here. This needs
3456                          * to be investigated.
3457                          */
3458                         ieee80211_send_pspoll(local, sdata);
3459                 }
3460         }
3461
3462         if (sdata->vif.p2p ||
3463             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3464                 struct ieee80211_p2p_noa_attr noa = {};
3465                 int ret;
3466
3467                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3468                                             len - baselen,
3469                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3470                                             (u8 *) &noa, sizeof(noa));
3471                 if (ret >= 2) {
3472                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3473                                 /* valid noa_attr and index changed */
3474                                 sdata->u.mgd.p2p_noa_index = noa.index;
3475                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3476                                 changed |= BSS_CHANGED_P2P_PS;
3477                                 /*
3478                                  * make sure we update all information, the CRC
3479                                  * mechanism doesn't look at P2P attributes.
3480                                  */
3481                                 ifmgd->beacon_crc_valid = false;
3482                         }
3483                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3484                         /* noa_attr not found and we had valid noa_attr before */
3485                         sdata->u.mgd.p2p_noa_index = -1;
3486                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3487                         changed |= BSS_CHANGED_P2P_PS;
3488                         ifmgd->beacon_crc_valid = false;
3489                 }
3490         }
3491
3492         if (ifmgd->csa_waiting_bcn)
3493                 ieee80211_chswitch_post_beacon(sdata);
3494
3495         /*
3496          * Update beacon timing and dtim count on every beacon appearance. This
3497          * will allow the driver to use the most updated values. Do it before
3498          * comparing this one with last received beacon.
3499          * IMPORTANT: These parameters would possibly be out of sync by the time
3500          * the driver will use them. The synchronized view is currently
3501          * guaranteed only in certain callbacks.
3502          */
3503         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3504                 sdata->vif.bss_conf.sync_tsf =
3505                         le64_to_cpu(mgmt->u.beacon.timestamp);
3506                 sdata->vif.bss_conf.sync_device_ts =
3507                         rx_status->device_timestamp;
3508                 if (elems.tim)
3509                         sdata->vif.bss_conf.sync_dtim_count =
3510                                 elems.tim->dtim_count;
3511                 else
3512                         sdata->vif.bss_conf.sync_dtim_count = 0;
3513         }
3514
3515         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3516                 return;
3517         ifmgd->beacon_crc = ncrc;
3518         ifmgd->beacon_crc_valid = true;
3519
3520         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3521
3522         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3523                                          rx_status->device_timestamp,
3524                                          &elems, true);
3525
3526         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3527             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3528                                      elems.wmm_param_len))
3529                 changed |= BSS_CHANGED_QOS;
3530
3531         /*
3532          * If we haven't had a beacon before, tell the driver about the
3533          * DTIM period (and beacon timing if desired) now.
3534          */
3535         if (!ifmgd->have_beacon) {
3536                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3537                 if (elems.tim)
3538                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3539                 else
3540                         bss_conf->dtim_period = 1;
3541
3542                 changed |= BSS_CHANGED_BEACON_INFO;
3543                 ifmgd->have_beacon = true;
3544
3545                 mutex_lock(&local->iflist_mtx);
3546                 ieee80211_recalc_ps(local);
3547                 mutex_unlock(&local->iflist_mtx);
3548
3549                 ieee80211_recalc_ps_vif(sdata);
3550         }
3551
3552         if (elems.erp_info) {
3553                 erp_valid = true;
3554                 erp_value = elems.erp_info[0];
3555         } else {
3556                 erp_valid = false;
3557         }
3558         changed |= ieee80211_handle_bss_capability(sdata,
3559                         le16_to_cpu(mgmt->u.beacon.capab_info),
3560                         erp_valid, erp_value);
3561
3562         mutex_lock(&local->sta_mtx);
3563         sta = sta_info_get(sdata, bssid);
3564
3565         if (ieee80211_config_bw(sdata, sta,
3566                                 elems.ht_cap_elem, elems.ht_operation,
3567                                 elems.vht_operation, bssid, &changed)) {
3568                 mutex_unlock(&local->sta_mtx);
3569                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3570                                        WLAN_REASON_DEAUTH_LEAVING,
3571                                        true, deauth_buf);
3572                 ieee80211_report_disconnect(sdata, deauth_buf,
3573                                             sizeof(deauth_buf), true,
3574                                             WLAN_REASON_DEAUTH_LEAVING);
3575                 return;
3576         }
3577
3578         if (sta && elems.opmode_notif)
3579                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3580                                             rx_status->band, true);
3581         mutex_unlock(&local->sta_mtx);
3582
3583         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3584                                                elems.country_elem,
3585                                                elems.country_elem_len,
3586                                                elems.pwr_constr_elem,
3587                                                elems.cisco_dtpc_elem);
3588
3589         ieee80211_bss_info_change_notify(sdata, changed);
3590 }
3591
3592 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3593                                   struct sk_buff *skb)
3594 {
3595         struct ieee80211_rx_status *rx_status;
3596         struct ieee80211_mgmt *mgmt;
3597         u16 fc;
3598         struct ieee802_11_elems elems;
3599         int ies_len;
3600
3601         rx_status = (struct ieee80211_rx_status *) skb->cb;
3602         mgmt = (struct ieee80211_mgmt *) skb->data;
3603         fc = le16_to_cpu(mgmt->frame_control);
3604
3605         sdata_lock(sdata);
3606
3607         switch (fc & IEEE80211_FCTL_STYPE) {
3608         case IEEE80211_STYPE_BEACON:
3609                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3610                 break;
3611         case IEEE80211_STYPE_PROBE_RESP:
3612                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3613                 break;
3614         case IEEE80211_STYPE_AUTH:
3615                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3616                 break;
3617         case IEEE80211_STYPE_DEAUTH:
3618                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3619                 break;
3620         case IEEE80211_STYPE_DISASSOC:
3621                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3622                 break;
3623         case IEEE80211_STYPE_ASSOC_RESP:
3624         case IEEE80211_STYPE_REASSOC_RESP:
3625                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3626                 break;
3627         case IEEE80211_STYPE_ACTION:
3628                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3629                         ies_len = skb->len -
3630                                   offsetof(struct ieee80211_mgmt,
3631                                            u.action.u.chan_switch.variable);
3632
3633                         if (ies_len < 0)
3634                                 break;
3635
3636                         ieee802_11_parse_elems(
3637                                 mgmt->u.action.u.chan_switch.variable,
3638                                 ies_len, true, &elems);
3639
3640                         if (elems.parse_error)
3641                                 break;
3642
3643                         ieee80211_sta_process_chanswitch(sdata,
3644                                                  rx_status->mactime,
3645                                                  rx_status->device_timestamp,
3646                                                  &elems, false);
3647                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3648                         ies_len = skb->len -
3649                                   offsetof(struct ieee80211_mgmt,
3650                                            u.action.u.ext_chan_switch.variable);
3651
3652                         if (ies_len < 0)
3653                                 break;
3654
3655                         ieee802_11_parse_elems(
3656                                 mgmt->u.action.u.ext_chan_switch.variable,
3657                                 ies_len, true, &elems);
3658
3659                         if (elems.parse_error)
3660                                 break;
3661
3662                         /* for the handling code pretend this was also an IE */
3663                         elems.ext_chansw_ie =
3664                                 &mgmt->u.action.u.ext_chan_switch.data;
3665
3666                         ieee80211_sta_process_chanswitch(sdata,
3667                                                  rx_status->mactime,
3668                                                  rx_status->device_timestamp,
3669                                                  &elems, false);
3670                 }
3671                 break;
3672         }
3673         sdata_unlock(sdata);
3674 }
3675
3676 static void ieee80211_sta_timer(unsigned long data)
3677 {
3678         struct ieee80211_sub_if_data *sdata =
3679                 (struct ieee80211_sub_if_data *) data;
3680
3681         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3682 }
3683
3684 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3685                                           u8 *bssid, u8 reason, bool tx)
3686 {
3687         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3688
3689         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3690                                tx, frame_buf);
3691
3692         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3693                                     reason);
3694 }
3695
3696 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3697 {
3698         struct ieee80211_local *local = sdata->local;
3699         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3700         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3701         u32 tx_flags = 0;
3702         u16 trans = 1;
3703         u16 status = 0;
3704
3705         sdata_assert_lock(sdata);
3706
3707         if (WARN_ON_ONCE(!auth_data))
3708                 return -EINVAL;
3709
3710         auth_data->tries++;
3711
3712         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3713                 sdata_info(sdata, "authentication with %pM timed out\n",
3714                            auth_data->bss->bssid);
3715
3716                 /*
3717                  * Most likely AP is not in the range so remove the
3718                  * bss struct for that AP.
3719                  */
3720                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3721
3722                 return -ETIMEDOUT;
3723         }
3724
3725         drv_mgd_prepare_tx(local, sdata);
3726
3727         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3728                    auth_data->bss->bssid, auth_data->tries,
3729                    IEEE80211_AUTH_MAX_TRIES);
3730
3731         auth_data->expected_transaction = 2;
3732
3733         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3734                 trans = auth_data->sae_trans;
3735                 status = auth_data->sae_status;
3736                 auth_data->expected_transaction = trans;
3737         }
3738
3739         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3740                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3741                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3742
3743         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3744                             auth_data->data, auth_data->data_len,
3745                             auth_data->bss->bssid,
3746                             auth_data->bss->bssid, NULL, 0, 0,
3747                             tx_flags);
3748
3749         if (tx_flags == 0) {
3750                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3751                 auth_data->timeout_started = true;
3752                 run_again(sdata, auth_data->timeout);
3753         } else {
3754                 auth_data->timeout =
3755                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3756                 auth_data->timeout_started = true;
3757                 run_again(sdata, auth_data->timeout);
3758         }
3759
3760         return 0;
3761 }
3762
3763 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3764 {
3765         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3766         struct ieee80211_local *local = sdata->local;
3767
3768         sdata_assert_lock(sdata);
3769
3770         assoc_data->tries++;
3771         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3772                 sdata_info(sdata, "association with %pM timed out\n",
3773                            assoc_data->bss->bssid);
3774
3775                 /*
3776                  * Most likely AP is not in the range so remove the
3777                  * bss struct for that AP.
3778                  */
3779                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3780
3781                 return -ETIMEDOUT;
3782         }
3783
3784         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3785                    assoc_data->bss->bssid, assoc_data->tries,
3786                    IEEE80211_ASSOC_MAX_TRIES);
3787         ieee80211_send_assoc(sdata);
3788
3789         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3790                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3791                 assoc_data->timeout_started = true;
3792                 run_again(sdata, assoc_data->timeout);
3793         } else {
3794                 assoc_data->timeout =
3795                         round_jiffies_up(jiffies +
3796                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3797                 assoc_data->timeout_started = true;
3798                 run_again(sdata, assoc_data->timeout);
3799         }
3800
3801         return 0;
3802 }
3803
3804 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3805                                   __le16 fc, bool acked)
3806 {
3807         struct ieee80211_local *local = sdata->local;
3808
3809         sdata->u.mgd.status_fc = fc;
3810         sdata->u.mgd.status_acked = acked;
3811         sdata->u.mgd.status_received = true;
3812
3813         ieee80211_queue_work(&local->hw, &sdata->work);
3814 }
3815
3816 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3817 {
3818         struct ieee80211_local *local = sdata->local;
3819         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3820
3821         sdata_lock(sdata);
3822
3823         if (ifmgd->status_received) {
3824                 __le16 fc = ifmgd->status_fc;
3825                 bool status_acked = ifmgd->status_acked;
3826
3827                 ifmgd->status_received = false;
3828                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3829                         if (status_acked) {
3830                                 ifmgd->auth_data->timeout =
3831                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3832                                 run_again(sdata, ifmgd->auth_data->timeout);
3833                         } else {
3834                                 ifmgd->auth_data->timeout = jiffies - 1;
3835                         }
3836                         ifmgd->auth_data->timeout_started = true;
3837                 } else if (ifmgd->assoc_data &&
3838                            (ieee80211_is_assoc_req(fc) ||
3839                             ieee80211_is_reassoc_req(fc))) {
3840                         if (status_acked) {
3841                                 ifmgd->assoc_data->timeout =
3842                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3843                                 run_again(sdata, ifmgd->assoc_data->timeout);
3844                         } else {
3845                                 ifmgd->assoc_data->timeout = jiffies - 1;
3846                         }
3847                         ifmgd->assoc_data->timeout_started = true;
3848                 }
3849         }
3850
3851         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3852             time_after(jiffies, ifmgd->auth_data->timeout)) {
3853                 if (ifmgd->auth_data->done) {
3854                         /*
3855                          * ok ... we waited for assoc but userspace didn't,
3856                          * so let's just kill the auth data
3857                          */
3858                         ieee80211_destroy_auth_data(sdata, false);
3859                 } else if (ieee80211_auth(sdata)) {
3860                         u8 bssid[ETH_ALEN];
3861                         struct ieee80211_event event = {
3862                                 .type = MLME_EVENT,
3863                                 .u.mlme.data = AUTH_EVENT,
3864                                 .u.mlme.status = MLME_TIMEOUT,
3865                         };
3866
3867                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3868
3869                         ieee80211_destroy_auth_data(sdata, false);
3870
3871                         cfg80211_auth_timeout(sdata->dev, bssid);
3872                         drv_event_callback(sdata->local, sdata, &event);
3873                 }
3874         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3875                 run_again(sdata, ifmgd->auth_data->timeout);
3876
3877         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3878             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3879                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3880                     ieee80211_do_assoc(sdata)) {
3881                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3882                         struct ieee80211_event event = {
3883                                 .type = MLME_EVENT,
3884                                 .u.mlme.data = ASSOC_EVENT,
3885                                 .u.mlme.status = MLME_TIMEOUT,
3886                         };
3887
3888                         ieee80211_destroy_assoc_data(sdata, false);
3889                         cfg80211_assoc_timeout(sdata->dev, bss);
3890                         drv_event_callback(sdata->local, sdata, &event);
3891                 }
3892         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3893                 run_again(sdata, ifmgd->assoc_data->timeout);
3894
3895         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3896             ifmgd->associated) {
3897                 u8 bssid[ETH_ALEN];
3898                 int max_tries;
3899
3900                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3901
3902                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3903                         max_tries = max_nullfunc_tries;
3904                 else
3905                         max_tries = max_probe_tries;
3906
3907                 /* ACK received for nullfunc probing frame */
3908                 if (!ifmgd->probe_send_count)
3909                         ieee80211_reset_ap_probe(sdata);
3910                 else if (ifmgd->nullfunc_failed) {
3911                         if (ifmgd->probe_send_count < max_tries) {
3912                                 mlme_dbg(sdata,
3913                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3914                                          bssid, ifmgd->probe_send_count,
3915                                          max_tries);
3916                                 ieee80211_mgd_probe_ap_send(sdata);
3917                         } else {
3918                                 mlme_dbg(sdata,
3919                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3920                                          bssid);
3921                                 ieee80211_sta_connection_lost(sdata, bssid,
3922                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3923                                         false);
3924                         }
3925                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3926                         run_again(sdata, ifmgd->probe_timeout);
3927                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3928                         mlme_dbg(sdata,
3929                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3930                                  bssid, probe_wait_ms);
3931                         ieee80211_sta_connection_lost(sdata, bssid,
3932                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3933                 } else if (ifmgd->probe_send_count < max_tries) {
3934                         mlme_dbg(sdata,
3935                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3936                                  bssid, probe_wait_ms,
3937                                  ifmgd->probe_send_count, max_tries);
3938                         ieee80211_mgd_probe_ap_send(sdata);
3939                 } else {
3940                         /*
3941                          * We actually lost the connection ... or did we?
3942                          * Let's make sure!
3943                          */
3944                         wiphy_debug(local->hw.wiphy,
3945                                     "%s: No probe response from AP %pM"
3946                                     " after %dms, disconnecting.\n",
3947                                     sdata->name,
3948                                     bssid, probe_wait_ms);
3949
3950                         ieee80211_sta_connection_lost(sdata, bssid,
3951                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3952                 }
3953         }
3954
3955         sdata_unlock(sdata);
3956 }
3957
3958 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3959 {
3960         struct ieee80211_sub_if_data *sdata =
3961                 (struct ieee80211_sub_if_data *) data;
3962         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3963
3964         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3965                 return;
3966
3967         sdata->u.mgd.connection_loss = false;
3968         ieee80211_queue_work(&sdata->local->hw,
3969                              &sdata->u.mgd.beacon_connection_loss_work);
3970 }
3971
3972 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3973 {
3974         struct ieee80211_sub_if_data *sdata =
3975                 (struct ieee80211_sub_if_data *) data;
3976         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3977         struct ieee80211_local *local = sdata->local;
3978
3979         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3980                 return;
3981
3982         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3983 }
3984
3985 static void ieee80211_sta_monitor_work(struct work_struct *work)
3986 {
3987         struct ieee80211_sub_if_data *sdata =
3988                 container_of(work, struct ieee80211_sub_if_data,
3989                              u.mgd.monitor_work);
3990
3991         ieee80211_mgd_probe_ap(sdata, false);
3992 }
3993
3994 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3995 {
3996         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3997                 __ieee80211_stop_poll(sdata);
3998
3999                 /* let's probe the connection once */
4000                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4001                         ieee80211_queue_work(&sdata->local->hw,
4002                                              &sdata->u.mgd.monitor_work);
4003                 /* and do all the other regular work too */
4004                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4005         }
4006 }
4007
4008 #ifdef CONFIG_PM
4009 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4010 {
4011         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4012         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4013
4014         sdata_lock(sdata);
4015
4016         if (ifmgd->auth_data || ifmgd->assoc_data) {
4017                 const u8 *bssid = ifmgd->auth_data ?
4018                                 ifmgd->auth_data->bss->bssid :
4019                                 ifmgd->assoc_data->bss->bssid;
4020
4021                 /*
4022                  * If we are trying to authenticate / associate while suspending,
4023                  * cfg80211 won't know and won't actually abort those attempts,
4024                  * thus we need to do that ourselves.
4025                  */
4026                 ieee80211_send_deauth_disassoc(sdata, bssid,
4027                                                IEEE80211_STYPE_DEAUTH,
4028                                                WLAN_REASON_DEAUTH_LEAVING,
4029                                                false, frame_buf);
4030                 if (ifmgd->assoc_data)
4031                         ieee80211_destroy_assoc_data(sdata, false);
4032                 if (ifmgd->auth_data)
4033                         ieee80211_destroy_auth_data(sdata, false);
4034                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4035                                       IEEE80211_DEAUTH_FRAME_LEN);
4036         }
4037
4038         /* This is a bit of a hack - we should find a better and more generic
4039          * solution to this. Normally when suspending, cfg80211 will in fact
4040          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4041          * auth (not so important) or assoc (this is the problem) process.
4042          *
4043          * As a consequence, it can happen that we are in the process of both
4044          * associating and suspending, and receive an association response
4045          * after cfg80211 has checked if it needs to disconnect, but before
4046          * we actually set the flag to drop incoming frames. This will then
4047          * cause the workqueue flush to process the association response in
4048          * the suspend, resulting in a successful association just before it
4049          * tries to remove the interface from the driver, which now though
4050          * has a channel context assigned ... this results in issues.
4051          *
4052          * To work around this (for now) simply deauth here again if we're
4053          * now connected.
4054          */
4055         if (ifmgd->associated && !sdata->local->wowlan) {
4056                 u8 bssid[ETH_ALEN];
4057                 struct cfg80211_deauth_request req = {
4058                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4059                         .bssid = bssid,
4060                 };
4061
4062                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4063                 ieee80211_mgd_deauth(sdata, &req);
4064         }
4065
4066         sdata_unlock(sdata);
4067 }
4068
4069 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4070 {
4071         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4072
4073         sdata_lock(sdata);
4074         if (!ifmgd->associated) {
4075                 sdata_unlock(sdata);
4076                 return;
4077         }
4078
4079         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4080                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4081                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4082                 ieee80211_sta_connection_lost(sdata,
4083                                               ifmgd->associated->bssid,
4084                                               WLAN_REASON_UNSPECIFIED,
4085                                               true);
4086                 sdata_unlock(sdata);
4087                 return;
4088         }
4089         sdata_unlock(sdata);
4090 }
4091 #endif
4092
4093 /* interface setup */
4094 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4095 {
4096         struct ieee80211_if_managed *ifmgd;
4097
4098         ifmgd = &sdata->u.mgd;
4099         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4100         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4101         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4102                   ieee80211_beacon_connection_loss_work);
4103         INIT_WORK(&ifmgd->csa_connection_drop_work,
4104                   ieee80211_csa_connection_drop_work);
4105         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4106         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4107                           ieee80211_tdls_peer_del_work);
4108         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4109                     (unsigned long) sdata);
4110         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4111                     (unsigned long) sdata);
4112         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4113                     (unsigned long) sdata);
4114         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4115                     (unsigned long) sdata);
4116         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4117                           ieee80211_sta_handle_tspec_ac_params_wk);
4118
4119         ifmgd->flags = 0;
4120         ifmgd->powersave = sdata->wdev.ps;
4121         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4122         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4123         ifmgd->p2p_noa_index = -1;
4124
4125         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4126                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4127         else
4128                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4129
4130         /* Setup TDLS data */
4131         spin_lock_init(&ifmgd->teardown_lock);
4132         ifmgd->teardown_skb = NULL;
4133         ifmgd->orig_teardown_skb = NULL;
4134 }
4135
4136 /* scan finished notification */
4137 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4138 {
4139         struct ieee80211_sub_if_data *sdata;
4140
4141         /* Restart STA timers */
4142         rcu_read_lock();
4143         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4144                 if (ieee80211_sdata_running(sdata))
4145                         ieee80211_restart_sta_timer(sdata);
4146         }
4147         rcu_read_unlock();
4148 }
4149
4150 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4151                                      struct cfg80211_bss *cbss)
4152 {
4153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4154         const u8 *ht_cap_ie, *vht_cap_ie;
4155         const struct ieee80211_ht_cap *ht_cap;
4156         const struct ieee80211_vht_cap *vht_cap;
4157         u8 chains = 1;
4158
4159         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4160                 return chains;
4161
4162         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4163         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4164                 ht_cap = (void *)(ht_cap_ie + 2);
4165                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4166                 /*
4167                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4168                  *       "Tx Unequal Modulation Supported" fields.
4169                  */
4170         }
4171
4172         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4173                 return chains;
4174
4175         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4176         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4177                 u8 nss;
4178                 u16 tx_mcs_map;
4179
4180                 vht_cap = (void *)(vht_cap_ie + 2);
4181                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4182                 for (nss = 8; nss > 0; nss--) {
4183                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4184                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4185                                 break;
4186                 }
4187                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4188                 chains = max(chains, nss);
4189         }
4190
4191         return chains;
4192 }
4193
4194 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4195                                   struct cfg80211_bss *cbss)
4196 {
4197         struct ieee80211_local *local = sdata->local;
4198         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4199         const struct ieee80211_ht_cap *ht_cap = NULL;
4200         const struct ieee80211_ht_operation *ht_oper = NULL;
4201         const struct ieee80211_vht_operation *vht_oper = NULL;
4202         struct ieee80211_supported_band *sband;
4203         struct cfg80211_chan_def chandef;
4204         int ret;
4205         u32 i;
4206         bool have_80mhz;
4207
4208         sband = local->hw.wiphy->bands[cbss->channel->band];
4209
4210         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4211                           IEEE80211_STA_DISABLE_80P80MHZ |
4212                           IEEE80211_STA_DISABLE_160MHZ);
4213
4214         rcu_read_lock();
4215
4216         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4217             sband->ht_cap.ht_supported) {
4218                 const u8 *ht_oper_ie, *ht_cap_ie;
4219
4220                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4221                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4222                         ht_oper = (void *)(ht_oper_ie + 2);
4223
4224                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4225                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4226                         ht_cap = (void *)(ht_cap_ie + 2);
4227
4228                 if (!ht_cap) {
4229                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4230                         ht_oper = NULL;
4231                 }
4232         }
4233
4234         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4235             sband->vht_cap.vht_supported) {
4236                 const u8 *vht_oper_ie, *vht_cap;
4237
4238                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4239                                                    WLAN_EID_VHT_OPERATION);
4240                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4241                         vht_oper = (void *)(vht_oper_ie + 2);
4242                 if (vht_oper && !ht_oper) {
4243                         vht_oper = NULL;
4244                         sdata_info(sdata,
4245                                    "AP advertised VHT without HT, disabling both\n");
4246                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4247                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4248                 }
4249
4250                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4251                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4252                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4253                         vht_oper = NULL;
4254                 }
4255         }
4256
4257         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4258         have_80mhz = false;
4259         for (i = 0; i < sband->n_channels; i++) {
4260                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4261                                                 IEEE80211_CHAN_NO_80MHZ))
4262                         continue;
4263
4264                 have_80mhz = true;
4265                 break;
4266         }
4267
4268         if (!have_80mhz)
4269                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4270
4271         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4272                                                      cbss->channel,
4273                                                      ht_cap, ht_oper, vht_oper,
4274                                                      &chandef, false);
4275
4276         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4277                                       local->rx_chains);
4278
4279         rcu_read_unlock();
4280
4281         /* will change later if needed */
4282         sdata->smps_mode = IEEE80211_SMPS_OFF;
4283
4284         mutex_lock(&local->mtx);
4285         /*
4286          * If this fails (possibly due to channel context sharing
4287          * on incompatible channels, e.g. 80+80 and 160 sharing the
4288          * same control channel) try to use a smaller bandwidth.
4289          */
4290         ret = ieee80211_vif_use_channel(sdata, &chandef,
4291                                         IEEE80211_CHANCTX_SHARED);
4292
4293         /* don't downgrade for 5 and 10 MHz channels, though. */
4294         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4295             chandef.width == NL80211_CHAN_WIDTH_10)
4296                 goto out;
4297
4298         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4299                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4300                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4301                                                 IEEE80211_CHANCTX_SHARED);
4302         }
4303  out:
4304         mutex_unlock(&local->mtx);
4305         return ret;
4306 }
4307
4308 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4309                                      struct cfg80211_bss *cbss, bool assoc,
4310                                      bool override)
4311 {
4312         struct ieee80211_local *local = sdata->local;
4313         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4314         struct ieee80211_bss *bss = (void *)cbss->priv;
4315         struct sta_info *new_sta = NULL;
4316         struct ieee80211_supported_band *sband;
4317         bool have_sta = false;
4318         int err;
4319
4320         sband = local->hw.wiphy->bands[cbss->channel->band];
4321
4322         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4323                 return -EINVAL;
4324
4325         if (assoc) {
4326                 rcu_read_lock();
4327                 have_sta = sta_info_get(sdata, cbss->bssid);
4328                 rcu_read_unlock();
4329         }
4330
4331         if (!have_sta) {
4332                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4333                 if (!new_sta)
4334                         return -ENOMEM;
4335         }
4336
4337         if (new_sta || override) {
4338                 err = ieee80211_prep_channel(sdata, cbss);
4339                 if (err) {
4340                         if (new_sta)
4341                                 sta_info_free(local, new_sta);
4342                         return -EINVAL;
4343                 }
4344         }
4345
4346         if (new_sta) {
4347                 u32 rates = 0, basic_rates = 0;
4348                 bool have_higher_than_11mbit;
4349                 int min_rate = INT_MAX, min_rate_index = -1;
4350                 struct ieee80211_chanctx_conf *chanctx_conf;
4351                 const struct cfg80211_bss_ies *ies;
4352                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4353                 u32 rate_flags;
4354
4355                 rcu_read_lock();
4356                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4357                 if (WARN_ON(!chanctx_conf)) {
4358                         rcu_read_unlock();
4359                         sta_info_free(local, new_sta);
4360                         return -EINVAL;
4361                 }
4362                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4363                 rcu_read_unlock();
4364
4365                 ieee80211_get_rates(sband, bss->supp_rates,
4366                                     bss->supp_rates_len,
4367                                     &rates, &basic_rates,
4368                                     &have_higher_than_11mbit,
4369                                     &min_rate, &min_rate_index,
4370                                     shift, rate_flags);
4371
4372                 /*
4373                  * This used to be a workaround for basic rates missing
4374                  * in the association response frame. Now that we no
4375                  * longer use the basic rates from there, it probably
4376                  * doesn't happen any more, but keep the workaround so
4377                  * in case some *other* APs are buggy in different ways
4378                  * we can connect -- with a warning.
4379                  */
4380                 if (!basic_rates && min_rate_index >= 0) {
4381                         sdata_info(sdata,
4382                                    "No basic rates, using min rate instead\n");
4383                         basic_rates = BIT(min_rate_index);
4384                 }
4385
4386                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4387                 sdata->vif.bss_conf.basic_rates = basic_rates;
4388
4389                 /* cf. IEEE 802.11 9.2.12 */
4390                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4391                     have_higher_than_11mbit)
4392                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4393                 else
4394                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4395
4396                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4397
4398                 /* set timing information */
4399                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4400                 rcu_read_lock();
4401                 ies = rcu_dereference(cbss->beacon_ies);
4402                 if (ies) {
4403                         const u8 *tim_ie;
4404
4405                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4406                         sdata->vif.bss_conf.sync_device_ts =
4407                                 bss->device_ts_beacon;
4408                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4409                                                   ies->data, ies->len);
4410                         if (tim_ie && tim_ie[1] >= 2)
4411                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4412                         else
4413                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4414                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4415                                                TIMING_BEACON_ONLY)) {
4416                         ies = rcu_dereference(cbss->proberesp_ies);
4417                         /* must be non-NULL since beacon IEs were NULL */
4418                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4419                         sdata->vif.bss_conf.sync_device_ts =
4420                                 bss->device_ts_presp;
4421                         sdata->vif.bss_conf.sync_dtim_count = 0;
4422                 } else {
4423                         sdata->vif.bss_conf.sync_tsf = 0;
4424                         sdata->vif.bss_conf.sync_device_ts = 0;
4425                         sdata->vif.bss_conf.sync_dtim_count = 0;
4426                 }
4427                 rcu_read_unlock();
4428
4429                 /* tell driver about BSSID, basic rates and timing */
4430                 ieee80211_bss_info_change_notify(sdata,
4431                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4432                         BSS_CHANGED_BEACON_INT);
4433
4434                 if (assoc)
4435                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4436
4437                 err = sta_info_insert(new_sta);
4438                 new_sta = NULL;
4439                 if (err) {
4440                         sdata_info(sdata,
4441                                    "failed to insert STA entry for the AP (error %d)\n",
4442                                    err);
4443                         return err;
4444                 }
4445         } else
4446                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4447
4448         /* Cancel scan to ensure that nothing interferes with connection */
4449         if (local->scanning)
4450                 ieee80211_scan_cancel(local);
4451
4452         return 0;
4453 }
4454
4455 /* config hooks */
4456 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4457                        struct cfg80211_auth_request *req)
4458 {
4459         struct ieee80211_local *local = sdata->local;
4460         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4461         struct ieee80211_mgd_auth_data *auth_data;
4462         u16 auth_alg;
4463         int err;
4464
4465         /* prepare auth data structure */
4466
4467         switch (req->auth_type) {
4468         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4469                 auth_alg = WLAN_AUTH_OPEN;
4470                 break;
4471         case NL80211_AUTHTYPE_SHARED_KEY:
4472                 if (IS_ERR(local->wep_tx_tfm))
4473                         return -EOPNOTSUPP;
4474                 auth_alg = WLAN_AUTH_SHARED_KEY;
4475                 break;
4476         case NL80211_AUTHTYPE_FT:
4477                 auth_alg = WLAN_AUTH_FT;
4478                 break;
4479         case NL80211_AUTHTYPE_NETWORK_EAP:
4480                 auth_alg = WLAN_AUTH_LEAP;
4481                 break;
4482         case NL80211_AUTHTYPE_SAE:
4483                 auth_alg = WLAN_AUTH_SAE;
4484                 break;
4485         default:
4486                 return -EOPNOTSUPP;
4487         }
4488
4489         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4490                             req->ie_len, GFP_KERNEL);
4491         if (!auth_data)
4492                 return -ENOMEM;
4493
4494         auth_data->bss = req->bss;
4495
4496         if (req->sae_data_len >= 4) {
4497                 __le16 *pos = (__le16 *) req->sae_data;
4498                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4499                 auth_data->sae_status = le16_to_cpu(pos[1]);
4500                 memcpy(auth_data->data, req->sae_data + 4,
4501                        req->sae_data_len - 4);
4502                 auth_data->data_len += req->sae_data_len - 4;
4503         }
4504
4505         if (req->ie && req->ie_len) {
4506                 memcpy(&auth_data->data[auth_data->data_len],
4507                        req->ie, req->ie_len);
4508                 auth_data->data_len += req->ie_len;
4509         }
4510
4511         if (req->key && req->key_len) {
4512                 auth_data->key_len = req->key_len;
4513                 auth_data->key_idx = req->key_idx;
4514                 memcpy(auth_data->key, req->key, req->key_len);
4515         }
4516
4517         auth_data->algorithm = auth_alg;
4518
4519         /* try to authenticate/probe */
4520
4521         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4522             ifmgd->assoc_data) {
4523                 err = -EBUSY;
4524                 goto err_free;
4525         }
4526
4527         if (ifmgd->auth_data)
4528                 ieee80211_destroy_auth_data(sdata, false);
4529
4530         /* prep auth_data so we don't go into idle on disassoc */
4531         ifmgd->auth_data = auth_data;
4532
4533         if (ifmgd->associated) {
4534                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4535
4536                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4537                                        WLAN_REASON_UNSPECIFIED,
4538                                        false, frame_buf);
4539
4540                 ieee80211_report_disconnect(sdata, frame_buf,
4541                                             sizeof(frame_buf), true,
4542                                             WLAN_REASON_UNSPECIFIED);
4543         }
4544
4545         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4546
4547         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4548         if (err)
4549                 goto err_clear;
4550
4551         err = ieee80211_auth(sdata);
4552         if (err) {
4553                 sta_info_destroy_addr(sdata, req->bss->bssid);
4554                 goto err_clear;
4555         }
4556
4557         /* hold our own reference */
4558         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4559         return 0;
4560
4561  err_clear:
4562         eth_zero_addr(ifmgd->bssid);
4563         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4564         ifmgd->auth_data = NULL;
4565         mutex_lock(&sdata->local->mtx);
4566         ieee80211_vif_release_channel(sdata);
4567         mutex_unlock(&sdata->local->mtx);
4568  err_free:
4569         kfree(auth_data);
4570         return err;
4571 }
4572
4573 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4574                         struct cfg80211_assoc_request *req)
4575 {
4576         struct ieee80211_local *local = sdata->local;
4577         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4578         struct ieee80211_bss *bss = (void *)req->bss->priv;
4579         struct ieee80211_mgd_assoc_data *assoc_data;
4580         const struct cfg80211_bss_ies *beacon_ies;
4581         struct ieee80211_supported_band *sband;
4582         const u8 *ssidie, *ht_ie, *vht_ie;
4583         int i, err;
4584         bool override = false;
4585
4586         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4587         if (!assoc_data)
4588                 return -ENOMEM;
4589
4590         rcu_read_lock();
4591         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4592         if (!ssidie) {
4593                 rcu_read_unlock();
4594                 kfree(assoc_data);
4595                 return -EINVAL;
4596         }
4597         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4598         assoc_data->ssid_len = ssidie[1];
4599         rcu_read_unlock();
4600
4601         if (ifmgd->associated) {
4602                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4603
4604                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4605                                        WLAN_REASON_UNSPECIFIED,
4606                                        false, frame_buf);
4607
4608                 ieee80211_report_disconnect(sdata, frame_buf,
4609                                             sizeof(frame_buf), true,
4610                                             WLAN_REASON_UNSPECIFIED);
4611         }
4612
4613         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4614                 err = -EBUSY;
4615                 goto err_free;
4616         }
4617
4618         if (ifmgd->assoc_data) {
4619                 err = -EBUSY;
4620                 goto err_free;
4621         }
4622
4623         if (ifmgd->auth_data) {
4624                 bool match;
4625
4626                 /* keep sta info, bssid if matching */
4627                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4628                 ieee80211_destroy_auth_data(sdata, match);
4629         }
4630
4631         /* prepare assoc data */
4632
4633         ifmgd->beacon_crc_valid = false;
4634
4635         assoc_data->wmm = bss->wmm_used &&
4636                           (local->hw.queues >= IEEE80211_NUM_ACS);
4637
4638         /*
4639          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4640          * We still associate in non-HT mode (11a/b/g) if any one of these
4641          * ciphers is configured as pairwise.
4642          * We can set this to true for non-11n hardware, that'll be checked
4643          * separately along with the peer capabilities.
4644          */
4645         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4646                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4647                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4648                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4649                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4650                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4651                         netdev_info(sdata->dev,
4652                                     "disabling HT/VHT due to WEP/TKIP use\n");
4653                 }
4654         }
4655
4656         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4657         sband = local->hw.wiphy->bands[req->bss->channel->band];
4658         if (!sband->ht_cap.ht_supported ||
4659             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4660             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4661                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4662                 if (!bss->wmm_used &&
4663                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4664                         netdev_info(sdata->dev,
4665                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4666         }
4667
4668         /* disable VHT if we don't support it or the AP doesn't use WMM */
4669         if (!sband->vht_cap.vht_supported ||
4670             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4671             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4672                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4673                 if (!bss->wmm_used &&
4674                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4675                         netdev_info(sdata->dev,
4676                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4677         }
4678
4679         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4680         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4681                sizeof(ifmgd->ht_capa_mask));
4682
4683         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4684         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4685                sizeof(ifmgd->vht_capa_mask));
4686
4687         if (req->ie && req->ie_len) {
4688                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4689                 assoc_data->ie_len = req->ie_len;
4690         }
4691
4692         assoc_data->bss = req->bss;
4693
4694         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4695                 if (ifmgd->powersave)
4696                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4697                 else
4698                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4699         } else
4700                 sdata->smps_mode = ifmgd->req_smps;
4701
4702         assoc_data->capability = req->bss->capability;
4703         assoc_data->supp_rates = bss->supp_rates;
4704         assoc_data->supp_rates_len = bss->supp_rates_len;
4705
4706         rcu_read_lock();
4707         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4708         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4709                 assoc_data->ap_ht_param =
4710                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4711         else
4712                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4713         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4714         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4715                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4716                        sizeof(struct ieee80211_vht_cap));
4717         else
4718                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4719         rcu_read_unlock();
4720
4721         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4722                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4723              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4724                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4725
4726         if (bss->wmm_used && bss->uapsd_supported &&
4727             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4728                 assoc_data->uapsd = true;
4729                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4730         } else {
4731                 assoc_data->uapsd = false;
4732                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4733         }
4734
4735         if (req->prev_bssid)
4736                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4737
4738         if (req->use_mfp) {
4739                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4740                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4741         } else {
4742                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4743                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4744         }
4745
4746         if (req->flags & ASSOC_REQ_USE_RRM)
4747                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4748         else
4749                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4750
4751         if (req->crypto.control_port)
4752                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4753         else
4754                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4755
4756         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4757         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4758         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4759                                                         sdata->vif.type);
4760
4761         /* kick off associate process */
4762
4763         ifmgd->assoc_data = assoc_data;
4764         ifmgd->dtim_period = 0;
4765         ifmgd->have_beacon = false;
4766
4767         /* override HT/VHT configuration only if the AP and we support it */
4768         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4769                 struct ieee80211_sta_ht_cap sta_ht_cap;
4770
4771                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4772                         override = true;
4773
4774                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4775                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4776
4777                 /* check for 40 MHz disable override */
4778                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4779                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4780                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4781                         override = true;
4782
4783                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4784                     req->flags & ASSOC_REQ_DISABLE_VHT)
4785                         override = true;
4786         }
4787
4788         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4789                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4790                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4791         }
4792
4793         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4794                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4795
4796         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4797         if (err)
4798                 goto err_clear;
4799
4800         rcu_read_lock();
4801         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4802
4803         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4804             !beacon_ies) {
4805                 /*
4806                  * Wait up to one beacon interval ...
4807                  * should this be more if we miss one?
4808                  */
4809                 sdata_info(sdata, "waiting for beacon from %pM\n",
4810                            ifmgd->bssid);
4811                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4812                 assoc_data->timeout_started = true;
4813                 assoc_data->need_beacon = true;
4814         } else if (beacon_ies) {
4815                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4816                                                     beacon_ies->data,
4817                                                     beacon_ies->len);
4818                 u8 dtim_count = 0;
4819
4820                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4821                         const struct ieee80211_tim_ie *tim;
4822                         tim = (void *)(tim_ie + 2);
4823                         ifmgd->dtim_period = tim->dtim_period;
4824                         dtim_count = tim->dtim_count;
4825                 }
4826                 ifmgd->have_beacon = true;
4827                 assoc_data->timeout = jiffies;
4828                 assoc_data->timeout_started = true;
4829
4830                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4831                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4832                         sdata->vif.bss_conf.sync_device_ts =
4833                                 bss->device_ts_beacon;
4834                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4835                 }
4836         } else {
4837                 assoc_data->timeout = jiffies;
4838                 assoc_data->timeout_started = true;
4839         }
4840         rcu_read_unlock();
4841
4842         run_again(sdata, assoc_data->timeout);
4843
4844         if (bss->corrupt_data) {
4845                 char *corrupt_type = "data";
4846                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4847                         if (bss->corrupt_data &
4848                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4849                                 corrupt_type = "beacon and probe response";
4850                         else
4851                                 corrupt_type = "beacon";
4852                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4853                         corrupt_type = "probe response";
4854                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4855                            corrupt_type);
4856         }
4857
4858         return 0;
4859  err_clear:
4860         eth_zero_addr(ifmgd->bssid);
4861         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4862         ifmgd->assoc_data = NULL;
4863  err_free:
4864         kfree(assoc_data);
4865         return err;
4866 }
4867
4868 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4869                          struct cfg80211_deauth_request *req)
4870 {
4871         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4872         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4873         bool tx = !req->local_state_change;
4874
4875         if (ifmgd->auth_data &&
4876             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4877                 sdata_info(sdata,
4878                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4879                            req->bssid, req->reason_code,
4880                            ieee80211_get_reason_code_string(req->reason_code));
4881
4882                 drv_mgd_prepare_tx(sdata->local, sdata);
4883                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4884                                                IEEE80211_STYPE_DEAUTH,
4885                                                req->reason_code, tx,
4886                                                frame_buf);
4887                 ieee80211_destroy_auth_data(sdata, false);
4888                 ieee80211_report_disconnect(sdata, frame_buf,
4889                                             sizeof(frame_buf), true,
4890                                             req->reason_code);
4891
4892                 return 0;
4893         }
4894
4895         if (ifmgd->assoc_data &&
4896             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4897                 sdata_info(sdata,
4898                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4899                            req->bssid, req->reason_code,
4900                            ieee80211_get_reason_code_string(req->reason_code));
4901
4902                 drv_mgd_prepare_tx(sdata->local, sdata);
4903                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4904                                                IEEE80211_STYPE_DEAUTH,
4905                                                req->reason_code, tx,
4906                                                frame_buf);
4907                 ieee80211_destroy_assoc_data(sdata, false);
4908                 ieee80211_report_disconnect(sdata, frame_buf,
4909                                             sizeof(frame_buf), true,
4910                                             req->reason_code);
4911                 return 0;
4912         }
4913
4914         if (ifmgd->associated &&
4915             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4916                 sdata_info(sdata,
4917                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4918                            req->bssid, req->reason_code,
4919                            ieee80211_get_reason_code_string(req->reason_code));
4920
4921                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4922                                        req->reason_code, tx, frame_buf);
4923                 ieee80211_report_disconnect(sdata, frame_buf,
4924                                             sizeof(frame_buf), true,
4925                                             req->reason_code);
4926                 return 0;
4927         }
4928
4929         return -ENOTCONN;
4930 }
4931
4932 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4933                            struct cfg80211_disassoc_request *req)
4934 {
4935         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4936         u8 bssid[ETH_ALEN];
4937         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4938
4939         /*
4940          * cfg80211 should catch this ... but it's racy since
4941          * we can receive a disassoc frame, process it, hand it
4942          * to cfg80211 while that's in a locked section already
4943          * trying to tell us that the user wants to disconnect.
4944          */
4945         if (ifmgd->associated != req->bss)
4946                 return -ENOLINK;
4947
4948         sdata_info(sdata,
4949                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4950                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4951
4952         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4953         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4954                                req->reason_code, !req->local_state_change,
4955                                frame_buf);
4956
4957         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4958                                     req->reason_code);
4959
4960         return 0;
4961 }
4962
4963 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4964 {
4965         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4966
4967         /*
4968          * Make sure some work items will not run after this,
4969          * they will not do anything but might not have been
4970          * cancelled when disconnecting.
4971          */
4972         cancel_work_sync(&ifmgd->monitor_work);
4973         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4974         cancel_work_sync(&ifmgd->request_smps_work);
4975         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4976         cancel_work_sync(&ifmgd->chswitch_work);
4977         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4978
4979         sdata_lock(sdata);
4980         if (ifmgd->assoc_data) {
4981                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4982                 ieee80211_destroy_assoc_data(sdata, false);
4983                 cfg80211_assoc_timeout(sdata->dev, bss);
4984         }
4985         if (ifmgd->auth_data)
4986                 ieee80211_destroy_auth_data(sdata, false);
4987         spin_lock_bh(&ifmgd->teardown_lock);
4988         if (ifmgd->teardown_skb) {
4989                 kfree_skb(ifmgd->teardown_skb);
4990                 ifmgd->teardown_skb = NULL;
4991                 ifmgd->orig_teardown_skb = NULL;
4992         }
4993         spin_unlock_bh(&ifmgd->teardown_lock);
4994         del_timer_sync(&ifmgd->timer);
4995         sdata_unlock(sdata);
4996 }
4997
4998 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4999                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5000                                gfp_t gfp)
5001 {
5002         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5003
5004         trace_api_cqm_rssi_notify(sdata, rssi_event);
5005
5006         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5007 }
5008 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5009
5010 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5011 {
5012         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5013
5014         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5015
5016         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5017 }
5018 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);