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  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/if_ether.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/moduleparam.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/pm_qos.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  * Weight given to the latest Beacon frame when calculating average signal
  85  * strength for Beacon frames received in the current BSS. This must be
  86  * between 1 and 15.
  87  */
  88 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  89
  90 /*
  91  * How many Beacon frames need to have been used in average signal strength
  92  * before starting to indicate signal change events.
  93  */
  94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  95
  96 /*
  97  * We can have multiple work items (and connection probing)
  98  * scheduling this timer, but we need to take care to only
  99  * reschedule it when it should fire _earlier_ than it was
 100  * asked for before, or if it's not pending right now. This
 101  * function ensures that. Note that it then is required to
 102  * run this function for all timeouts after the first one
 103  * has happened -- the work that runs from this timer will
 104  * do that.
 105  */
 106 static void run_again(struct ieee80211_sub_if_data *sdata,
 107                       unsigned long timeout)
 108 {
 109         sdata_assert_lock(sdata);
 110
 111         if (!timer_pending(&sdata->u.mgd.timer) ||
 112             time_before(timeout, sdata->u.mgd.timer.expires))
 113                 mod_timer(&sdata->u.mgd.timer, timeout);
 114 }
 115
 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 117 {
 118         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 119                 return;
 120
 121         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 122                 return;
 123
 124         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 125                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 126 }
 127
 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 129 {
 130         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 131
 132         if (unlikely(!sdata->u.mgd.associated))
 133                 return;
 134
 135         ifmgd->probe_send_count = 0;
 136
 137         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 138                 return;
 139
 140         mod_timer(&sdata->u.mgd.conn_mon_timer,
 141                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 142 }
 143
 144 static int ecw2cw(int ecw)
 145 {
 146         return (1 << ecw) - 1;
 147 }
 148
 149 static u32
 150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 151                              struct ieee80211_supported_band *sband,
 152                              struct ieee80211_channel *channel,
 153                              const struct ieee80211_ht_cap *ht_cap,
 154                              const struct ieee80211_ht_operation *ht_oper,
 155                              const struct ieee80211_vht_operation *vht_oper,
 156                              struct cfg80211_chan_def *chandef, bool tracking)
 157 {
 158         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 159         struct cfg80211_chan_def vht_chandef;
 160         struct ieee80211_sta_ht_cap sta_ht_cap;
 161         u32 ht_cfreq, ret;
 162
 163         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 164         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 165
 166         chandef->chan = channel;
 167         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 168         chandef->center_freq1 = channel->center_freq;
 169         chandef->center_freq2 = 0;
 170
 171         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 172                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 173                 goto out;
 174         }
 175
 176         chandef->width = NL80211_CHAN_WIDTH_20;
 177
 178         if (!(ht_cap->cap_info &
 179               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 180                 ret = IEEE80211_STA_DISABLE_40MHZ;
 181                 vht_chandef = *chandef;
 182                 goto out;
 183         }
 184
 185         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 186                                                   channel->band);
 187         /* check that channel matches the right operating channel */
 188         if (!tracking && channel->center_freq != ht_cfreq) {
 189                 /*
 190                  * It's possible that some APs are confused here;
 191                  * Netgear WNDR3700 sometimes reports 4 higher than
 192                  * the actual channel in association responses, but
 193                  * since we look at probe response/beacon data here
 194                  * it should be OK.
 195                  */
 196                 sdata_info(sdata,
 197                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 198                            channel->center_freq, ht_cfreq,
 199                            ht_oper->primary_chan, channel->band);
 200                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 201                 goto out;
 202         }
 203
 204         /* check 40 MHz support, if we have it */
 205         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 206                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 207                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 208                         chandef->width = NL80211_CHAN_WIDTH_40;
 209                         chandef->center_freq1 += 10;
 210                         break;
 211                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 212                         chandef->width = NL80211_CHAN_WIDTH_40;
 213                         chandef->center_freq1 -= 10;
 214                         break;
 215                 }
 216         } else {
 217                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 218                 ret = IEEE80211_STA_DISABLE_VHT;
 219                 /* also mark 40 MHz disabled */
 220                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 221                 goto out;
 222         }
 223
 224         if (!vht_oper || !sband->vht_cap.vht_supported) {
 225                 ret = IEEE80211_STA_DISABLE_VHT;
 226                 goto out;
 227         }
 228
 229         vht_chandef.chan = channel;
 230         vht_chandef.center_freq1 =
 231                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 232                                                channel->band);
 233         vht_chandef.center_freq2 = 0;
 234
 235         switch (vht_oper->chan_width) {
 236         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 237                 vht_chandef.width = chandef->width;
 238                 vht_chandef.center_freq1 = chandef->center_freq1;
 239                 break;
 240         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 241                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 242                 break;
 243         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 244                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 245                 break;
 246         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 247                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 248                 vht_chandef.center_freq2 =
 249                         ieee80211_channel_to_frequency(
 250                                 vht_oper->center_freq_seg2_idx,
 251                                 channel->band);
 252                 break;
 253         default:
 254                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 255                         sdata_info(sdata,
 256                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 257                                    vht_oper->chan_width);
 258                 ret = IEEE80211_STA_DISABLE_VHT;
 259                 goto out;
 260         }
 261
 262         if (!cfg80211_chandef_valid(&vht_chandef)) {
 263                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 264                         sdata_info(sdata,
 265                                    "AP VHT information is invalid, disable VHT\n");
 266                 ret = IEEE80211_STA_DISABLE_VHT;
 267                 goto out;
 268         }
 269
 270         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 271                 ret = 0;
 272                 goto out;
 273         }
 274
 275         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 276                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 277                         sdata_info(sdata,
 278                                    "AP VHT information doesn't match HT, disable VHT\n");
 279                 ret = IEEE80211_STA_DISABLE_VHT;
 280                 goto out;
 281         }
 282
 283         *chandef = vht_chandef;
 284
 285         ret = 0;
 286
 287 out:
 288         /*
 289          * When tracking the current AP, don't do any further checks if the
 290          * new chandef is identical to the one we're currently using for the
 291          * connection. This keeps us from playing ping-pong with regulatory,
 292          * without it the following can happen (for example):
 293          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 294          *  - AP advertises regdom US
 295          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 296          *  - the code below detects an unsupported channel, downgrades, and
 297          *    we disconnect from the AP in the caller
 298          *  - disconnect causes CRDA to reload world regdomain and the game
 299          *    starts anew.
 300          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 301          *
 302          * It seems possible that there are still scenarios with CSA or real
 303          * bandwidth changes where a this could happen, but those cases are
 304          * less common and wouldn't completely prevent using the AP.
 305          */
 306         if (tracking &&
 307             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 308                 return ret;
 309
 310         /* don't print the message below for VHT mismatch if VHT is disabled */
 311         if (ret & IEEE80211_STA_DISABLE_VHT)
 312                 vht_chandef = *chandef;
 313
 314         /*
 315          * Ignore the DISABLED flag when we're already connected and only
 316          * tracking the APs beacon for bandwidth changes - otherwise we
 317          * might get disconnected here if we connect to an AP, update our
 318          * regulatory information based on the AP's country IE and the
 319          * information we have is wrong/outdated and disables the channel
 320          * that we're actually using for the connection to the AP.
 321          */
 322         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 323                                         tracking ? 0 :
 324                                                    IEEE80211_CHAN_DISABLED)) {
 325                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 326                         ret = IEEE80211_STA_DISABLE_HT |
 327                               IEEE80211_STA_DISABLE_VHT;
 328                         break;
 329                 }
 330
 331                 ret |= ieee80211_chandef_downgrade(chandef);
 332         }
 333
 334         if (chandef->width != vht_chandef.width && !tracking)
 335                 sdata_info(sdata,
 336                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 337
 338         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 339         return ret;
 340 }
 341
 342 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 343                                struct sta_info *sta,
 344                                const struct ieee80211_ht_cap *ht_cap,
 345                                const struct ieee80211_ht_operation *ht_oper,
 346                                const struct ieee80211_vht_operation *vht_oper,
 347                                const u8 *bssid, u32 *changed)
 348 {
 349         struct ieee80211_local *local = sdata->local;
 350         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 351         struct ieee80211_supported_band *sband;
 352         struct ieee80211_channel *chan;
 353         struct cfg80211_chan_def chandef;
 354         u16 ht_opmode;
 355         u32 flags;
 356         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 357         int ret;
 358
 359         /* if HT was/is disabled, don't track any bandwidth changes */
 360         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 361                 return 0;
 362
 363         /* don't check VHT if we associated as non-VHT station */
 364         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 365                 vht_oper = NULL;
 366
 367         if (WARN_ON_ONCE(!sta))
 368                 return -EINVAL;
 369
 370         /*
 371          * if bss configuration changed store the new one -
 372          * this may be applicable even if channel is identical
 373          */
 374         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 375         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 376                 *changed |= BSS_CHANGED_HT;
 377                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 378         }
 379
 380         chan = sdata->vif.bss_conf.chandef.chan;
 381         sband = local->hw.wiphy->bands[chan->band];
 382
 383         /* calculate new channel (type) based on HT/VHT operation IEs */
 384         flags = ieee80211_determine_chantype(sdata, sband, chan,
 385                                              ht_cap, ht_oper, vht_oper,
 386                                              &chandef, true);
 387
 388         /*
 389          * Downgrade the new channel if we associated with restricted
 390          * capabilities. For example, if we associated as a 20 MHz STA
 391          * to a 40 MHz AP (due to regulatory, capabilities or config
 392          * reasons) then switching to a 40 MHz channel now won't do us
 393          * any good -- we couldn't use it with the AP.
 394          */
 395         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 396             chandef.width == NL80211_CHAN_WIDTH_80P80)
 397                 flags |= ieee80211_chandef_downgrade(&chandef);
 398         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 399             chandef.width == NL80211_CHAN_WIDTH_160)
 400                 flags |= ieee80211_chandef_downgrade(&chandef);
 401         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 402             chandef.width > NL80211_CHAN_WIDTH_20)
 403                 flags |= ieee80211_chandef_downgrade(&chandef);
 404
 405         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 406                 return 0;
 407
 408         sdata_info(sdata,
 409                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 410                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 411                    chandef.center_freq1, chandef.center_freq2);
 412
 413         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 414                                       IEEE80211_STA_DISABLE_VHT |
 415                                       IEEE80211_STA_DISABLE_40MHZ |
 416                                       IEEE80211_STA_DISABLE_80P80MHZ |
 417                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 418             !cfg80211_chandef_valid(&chandef)) {
 419                 sdata_info(sdata,
 420                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 421                            ifmgd->bssid);
 422                 return -EINVAL;
 423         }
 424
 425         switch (chandef.width) {
 426         case NL80211_CHAN_WIDTH_20_NOHT:
 427         case NL80211_CHAN_WIDTH_20:
 428                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 429                 break;
 430         case NL80211_CHAN_WIDTH_40:
 431                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 432                 break;
 433         case NL80211_CHAN_WIDTH_80:
 434                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 435                 break;
 436         case NL80211_CHAN_WIDTH_80P80:
 437         case NL80211_CHAN_WIDTH_160:
 438                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 439                 break;
 440         default:
 441                 return -EINVAL;
 442         }
 443
 444         if (new_sta_bw > sta->cur_max_bandwidth)
 445                 new_sta_bw = sta->cur_max_bandwidth;
 446
 447         if (new_sta_bw < sta->sta.bandwidth) {
 448                 sta->sta.bandwidth = new_sta_bw;
 449                 rate_control_rate_update(local, sband, sta,
 450                                          IEEE80211_RC_BW_CHANGED);
 451         }
 452
 453         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 454         if (ret) {
 455                 sdata_info(sdata,
 456                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 457                            ifmgd->bssid);
 458                 return ret;
 459         }
 460
 461         if (new_sta_bw > sta->sta.bandwidth) {
 462                 sta->sta.bandwidth = new_sta_bw;
 463                 rate_control_rate_update(local, sband, sta,
 464                                          IEEE80211_RC_BW_CHANGED);
 465         }
 466
 467         return 0;
 468 }
 469
 470 /* frame sending functions */
 471
 472 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 473                                 struct sk_buff *skb, u8 ap_ht_param,
 474                                 struct ieee80211_supported_band *sband,
 475                                 struct ieee80211_channel *channel,
 476                                 enum ieee80211_smps_mode smps)
 477 {
 478         u8 *pos;
 479         u32 flags = channel->flags;
 480         u16 cap;
 481         struct ieee80211_sta_ht_cap ht_cap;
 482
 483         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 484
 485         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 486         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 487
 488         /* determine capability flags */
 489         cap = ht_cap.cap;
 490
 491         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 492         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 493                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 494                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 495                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 496                 }
 497                 break;
 498         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 499                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 500                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 501                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 502                 }
 503                 break;
 504         }
 505
 506         /*
 507          * If 40 MHz was disabled associate as though we weren't
 508          * capable of 40 MHz -- some broken APs will never fall
 509          * back to trying to transmit in 20 MHz.
 510          */
 511         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 512                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 513                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 514         }
 515
 516         /* set SM PS mode properly */
 517         cap &= ~IEEE80211_HT_CAP_SM_PS;
 518         switch (smps) {
 519         case IEEE80211_SMPS_AUTOMATIC:
 520         case IEEE80211_SMPS_NUM_MODES:
 521                 WARN_ON(1);
 522         case IEEE80211_SMPS_OFF:
 523                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 524                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 525                 break;
 526         case IEEE80211_SMPS_STATIC:
 527                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 528                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 529                 break;
 530         case IEEE80211_SMPS_DYNAMIC:
 531                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 532                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 533                 break;
 534         }
 535
 536         /* reserve and fill IE */
 537         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 538         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 539 }
 540
 541 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 542                                  struct sk_buff *skb,
 543                                  struct ieee80211_supported_band *sband,
 544                                  struct ieee80211_vht_cap *ap_vht_cap)
 545 {
 546         u8 *pos;
 547         u32 cap;
 548         struct ieee80211_sta_vht_cap vht_cap;
 549         u32 mask, ap_bf_sts, our_bf_sts;
 550
 551         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 552
 553         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 554         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 555
 556         /* determine capability flags */
 557         cap = vht_cap.cap;
 558
 559         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 560                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 561
 562                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 563                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 564                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 565                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 566         }
 567
 568         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 569                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 570                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 571         }
 572
 573         /*
 574          * Some APs apparently get confused if our capabilities are better
 575          * than theirs, so restrict what we advertise in the assoc request.
 576          */
 577         if (!(ap_vht_cap->vht_cap_info &
 578                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 579                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 580
 581         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 582
 583         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 584         our_bf_sts = cap & mask;
 585
 586         if (ap_bf_sts < our_bf_sts) {
 587                 cap &= ~mask;
 588                 cap |= ap_bf_sts;
 589         }
 590
 591         /* reserve and fill IE */
 592         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 593         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 594 }
 595
 596 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 597 {
 598         struct ieee80211_local *local = sdata->local;
 599         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 600         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 601         struct sk_buff *skb;
 602         struct ieee80211_mgmt *mgmt;
 603         u8 *pos, qos_info;
 604         size_t offset = 0, noffset;
 605         int i, count, rates_len, supp_rates_len, shift;
 606         u16 capab;
 607         struct ieee80211_supported_band *sband;
 608         struct ieee80211_chanctx_conf *chanctx_conf;
 609         struct ieee80211_channel *chan;
 610         u32 rate_flags, rates = 0;
 611
 612         sdata_assert_lock(sdata);
 613
 614         rcu_read_lock();
 615         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 616         if (WARN_ON(!chanctx_conf)) {
 617                 rcu_read_unlock();
 618                 return;
 619         }
 620         chan = chanctx_conf->def.chan;
 621         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 622         rcu_read_unlock();
 623         sband = local->hw.wiphy->bands[chan->band];
 624         shift = ieee80211_vif_get_shift(&sdata->vif);
 625
 626         if (assoc_data->supp_rates_len) {
 627                 /*
 628                  * Get all rates supported by the device and the AP as
 629                  * some APs don't like getting a superset of their rates
 630                  * in the association request (e.g. D-Link DAP 1353 in
 631                  * b-only mode)...
 632                  */
 633                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 634                                                      assoc_data->supp_rates,
 635                                                      assoc_data->supp_rates_len,
 636                                                      &rates);
 637         } else {
 638                 /*
 639                  * In case AP not provide any supported rates information
 640                  * before association, we send information element(s) with
 641                  * all rates that we support.
 642                  */
 643                 rates_len = 0;
 644                 for (i = 0; i < sband->n_bitrates; i++) {
 645                         if ((rate_flags & sband->bitrates[i].flags)
 646                             != rate_flags)
 647                                 continue;
 648                         rates |= BIT(i);
 649                         rates_len++;
 650                 }
 651         }
 652
 653         skb = alloc_skb(local->hw.extra_tx_headroom +
 654                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 655                         2 + assoc_data->ssid_len + /* SSID */
 656                         4 + rates_len + /* (extended) rates */
 657                         4 + /* power capability */
 658                         2 + 2 * sband->n_channels + /* supported channels */
 659                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 660                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 661                         assoc_data->ie_len + /* extra IEs */
 662                         9, /* WMM */
 663                         GFP_KERNEL);
 664         if (!skb)
 665                 return;
 666
 667         skb_reserve(skb, local->hw.extra_tx_headroom);
 668
 669         capab = WLAN_CAPABILITY_ESS;
 670
 671         if (sband->band == IEEE80211_BAND_2GHZ) {
 672                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 673                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 674                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 675                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 676         }
 677
 678         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 679                 capab |= WLAN_CAPABILITY_PRIVACY;
 680
 681         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 682             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 683                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 684
 685         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 686                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 687
 688         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 689         memset(mgmt, 0, 24);
 690         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 691         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 692         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 693
 694         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 695                 skb_put(skb, 10);
 696                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 697                                                   IEEE80211_STYPE_REASSOC_REQ);
 698                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 699                 mgmt->u.reassoc_req.listen_interval =
 700                                 cpu_to_le16(local->hw.conf.listen_interval);
 701                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 702                        ETH_ALEN);
 703         } else {
 704                 skb_put(skb, 4);
 705                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 706                                                   IEEE80211_STYPE_ASSOC_REQ);
 707                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 708                 mgmt->u.assoc_req.listen_interval =
 709                                 cpu_to_le16(local->hw.conf.listen_interval);
 710         }
 711
 712         /* SSID */
 713         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 714         *pos++ = WLAN_EID_SSID;
 715         *pos++ = assoc_data->ssid_len;
 716         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 717
 718         /* add all rates which were marked to be used above */
 719         supp_rates_len = rates_len;
 720         if (supp_rates_len > 8)
 721                 supp_rates_len = 8;
 722
 723         pos = skb_put(skb, supp_rates_len + 2);
 724         *pos++ = WLAN_EID_SUPP_RATES;
 725         *pos++ = supp_rates_len;
 726
 727         count = 0;
 728         for (i = 0; i < sband->n_bitrates; i++) {
 729                 if (BIT(i) & rates) {
 730                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 731                                                 5 * (1 << shift));
 732                         *pos++ = (u8) rate;
 733                         if (++count == 8)
 734                                 break;
 735                 }
 736         }
 737
 738         if (rates_len > count) {
 739                 pos = skb_put(skb, rates_len - count + 2);
 740                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 741                 *pos++ = rates_len - count;
 742
 743                 for (i++; i < sband->n_bitrates; i++) {
 744                         if (BIT(i) & rates) {
 745                                 int rate;
 746                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 747                                                     5 * (1 << shift));
 748                                 *pos++ = (u8) rate;
 749                         }
 750                 }
 751         }
 752
 753         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 754             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 755                 pos = skb_put(skb, 4);
 756                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 757                 *pos++ = 2;
 758                 *pos++ = 0; /* min tx power */
 759                  /* max tx power */
 760                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 761         }
 762
 763         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 764                 /* TODO: get this in reg domain format */
 765                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 766                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 767                 *pos++ = 2 * sband->n_channels;
 768                 for (i = 0; i < sband->n_channels; i++) {
 769                         *pos++ = ieee80211_frequency_to_channel(
 770                                         sband->channels[i].center_freq);
 771                         *pos++ = 1; /* one channel in the subband*/
 772                 }
 773         }
 774
 775         /* if present, add any custom IEs that go before HT */
 776         if (assoc_data->ie_len) {
 777                 static const u8 before_ht[] = {
 778                         WLAN_EID_SSID,
 779                         WLAN_EID_SUPP_RATES,
 780                         WLAN_EID_EXT_SUPP_RATES,
 781                         WLAN_EID_PWR_CAPABILITY,
 782                         WLAN_EID_SUPPORTED_CHANNELS,
 783                         WLAN_EID_RSN,
 784                         WLAN_EID_QOS_CAPA,
 785                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 786                         WLAN_EID_MOBILITY_DOMAIN,
 787                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 788                         WLAN_EID_RIC_DATA,              /* reassoc only */
 789                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 790                 };
 791                 static const u8 after_ric[] = {
 792                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 793                         WLAN_EID_HT_CAPABILITY,
 794                         WLAN_EID_BSS_COEX_2040,
 795                         WLAN_EID_EXT_CAPABILITY,
 796                         WLAN_EID_QOS_TRAFFIC_CAPA,
 797                         WLAN_EID_TIM_BCAST_REQ,
 798                         WLAN_EID_INTERWORKING,
 799                         /* 60GHz doesn't happen right now */
 800                         WLAN_EID_VHT_CAPABILITY,
 801                         WLAN_EID_OPMODE_NOTIF,
 802                 };
 803
 804                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 805                                                  assoc_data->ie_len,
 806                                                  before_ht,
 807                                                  ARRAY_SIZE(before_ht),
 808                                                  after_ric,
 809                                                  ARRAY_SIZE(after_ric),
 810                                                  offset);
 811                 pos = skb_put(skb, noffset - offset);
 812                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 813                 offset = noffset;
 814         }
 815
 816         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 817                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 818                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 819
 820         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 821                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 822                                     sband, chan, sdata->smps_mode);
 823
 824         /* if present, add any custom IEs that go before VHT */
 825         if (assoc_data->ie_len) {
 826                 static const u8 before_vht[] = {
 827                         WLAN_EID_SSID,
 828                         WLAN_EID_SUPP_RATES,
 829                         WLAN_EID_EXT_SUPP_RATES,
 830                         WLAN_EID_PWR_CAPABILITY,
 831                         WLAN_EID_SUPPORTED_CHANNELS,
 832                         WLAN_EID_RSN,
 833                         WLAN_EID_QOS_CAPA,
 834                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 835                         WLAN_EID_MOBILITY_DOMAIN,
 836                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 837                         WLAN_EID_HT_CAPABILITY,
 838                         WLAN_EID_BSS_COEX_2040,
 839                         WLAN_EID_EXT_CAPABILITY,
 840                         WLAN_EID_QOS_TRAFFIC_CAPA,
 841                         WLAN_EID_TIM_BCAST_REQ,
 842                         WLAN_EID_INTERWORKING,
 843                 };
 844
 845                 /* RIC already taken above, so no need to handle here anymore */
 846                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 847                                              before_vht, ARRAY_SIZE(before_vht),
 848                                              offset);
 849                 pos = skb_put(skb, noffset - offset);
 850                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 851                 offset = noffset;
 852         }
 853
 854         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 855                 ieee80211_add_vht_ie(sdata, skb, sband,
 856                                      &assoc_data->ap_vht_cap);
 857
 858         /* if present, add any custom non-vendor IEs that go after HT */
 859         if (assoc_data->ie_len) {
 860                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 861                                                     assoc_data->ie_len,
 862                                                     offset);
 863                 pos = skb_put(skb, noffset - offset);
 864                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 865                 offset = noffset;
 866         }
 867
 868         if (assoc_data->wmm) {
 869                 if (assoc_data->uapsd) {
 870                         qos_info = ifmgd->uapsd_queues;
 871                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 872                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 873                 } else {
 874                         qos_info = 0;
 875                 }
 876
 877                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 878         }
 879
 880         /* add any remaining custom (i.e. vendor specific here) IEs */
 881         if (assoc_data->ie_len) {
 882                 noffset = assoc_data->ie_len;
 883                 pos = skb_put(skb, noffset - offset);
 884                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 885         }
 886
 887         drv_mgd_prepare_tx(local, sdata);
 888
 889         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 890         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 891                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 892                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 893         ieee80211_tx_skb(sdata, skb);
 894 }
 895
 896 void ieee80211_send_pspoll(struct ieee80211_local *local,
 897                            struct ieee80211_sub_if_data *sdata)
 898 {
 899         struct ieee80211_pspoll *pspoll;
 900         struct sk_buff *skb;
 901
 902         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 903         if (!skb)
 904                 return;
 905
 906         pspoll = (struct ieee80211_pspoll *) skb->data;
 907         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 908
 909         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 910         ieee80211_tx_skb(sdata, skb);
 911 }
 912
 913 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 914                              struct ieee80211_sub_if_data *sdata,
 915                              int powersave)
 916 {
 917         struct sk_buff *skb;
 918         struct ieee80211_hdr_3addr *nullfunc;
 919         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 920
 921         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 922         if (!skb)
 923                 return;
 924
 925         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 926         if (powersave)
 927                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 928
 929         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 930                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 931
 932         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 933                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 934
 935         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 936                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 937
 938         ieee80211_tx_skb(sdata, skb);
 939 }
 940
 941 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 942                                           struct ieee80211_sub_if_data *sdata)
 943 {
 944         struct sk_buff *skb;
 945         struct ieee80211_hdr *nullfunc;
 946         __le16 fc;
 947
 948         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 949                 return;
 950
 951         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 952         if (!skb)
 953                 return;
 954
 955         skb_reserve(skb, local->hw.extra_tx_headroom);
 956
 957         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 958         memset(nullfunc, 0, 30);
 959         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 960                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 961         nullfunc->frame_control = fc;
 962         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 963         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 964         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 965         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 966
 967         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 968         ieee80211_tx_skb(sdata, skb);
 969 }
 970
 971 /* spectrum management related things */
 972 static void ieee80211_chswitch_work(struct work_struct *work)
 973 {
 974         struct ieee80211_sub_if_data *sdata =
 975                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 976         struct ieee80211_local *local = sdata->local;
 977         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 978         int ret;
 979
 980         if (!ieee80211_sdata_running(sdata))
 981                 return;
 982
 983         sdata_lock(sdata);
 984         mutex_lock(&local->mtx);
 985         mutex_lock(&local->chanctx_mtx);
 986
 987         if (!ifmgd->associated)
 988                 goto out;
 989
 990         if (!sdata->vif.csa_active)
 991                 goto out;
 992
 993         /*
 994          * using reservation isn't immediate as it may be deferred until later
 995          * with multi-vif. once reservation is complete it will re-schedule the
 996          * work with no reserved_chanctx so verify chandef to check if it
 997          * completed successfully
 998          */
 999
1000         if (sdata->reserved_chanctx) {
1001                 /*
1002                  * with multi-vif csa driver may call ieee80211_csa_finish()
1003                  * many times while waiting for other interfaces to use their
1004                  * reservations
1005                  */
1006                 if (sdata->reserved_ready)
1007                         goto out;
1008
1009                 ret = ieee80211_vif_use_reserved_context(sdata);
1010                 if (ret) {
1011                         sdata_info(sdata,
1012                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1013                                    ret);
1014                         ieee80211_queue_work(&sdata->local->hw,
1015                                              &ifmgd->csa_connection_drop_work);
1016                         goto out;
1017                 }
1018
1019                 goto out;
1020         }
1021
1022         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023                                         &sdata->csa_chandef)) {
1024                 sdata_info(sdata,
1025                            "failed to finalize channel switch, disconnecting\n");
1026                 ieee80211_queue_work(&sdata->local->hw,
1027                                      &ifmgd->csa_connection_drop_work);
1028                 goto out;
1029         }
1030
1031         /* XXX: shouldn't really modify cfg80211-owned data! */
1032         ifmgd->associated->channel = sdata->csa_chandef.chan;
1033
1034         ifmgd->csa_waiting_bcn = true;
1035
1036         ieee80211_sta_reset_beacon_monitor(sdata);
1037         ieee80211_sta_reset_conn_monitor(sdata);
1038
1039 out:
1040         mutex_unlock(&local->chanctx_mtx);
1041         mutex_unlock(&local->mtx);
1042         sdata_unlock(sdata);
1043 }
1044
1045 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046 {
1047         struct ieee80211_local *local = sdata->local;
1048         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049         int ret;
1050
1051         sdata_assert_lock(sdata);
1052
1053         WARN_ON(!sdata->vif.csa_active);
1054
1055         if (sdata->csa_block_tx) {
1056                 ieee80211_wake_vif_queues(local, sdata,
1057                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1058                 sdata->csa_block_tx = false;
1059         }
1060
1061         sdata->vif.csa_active = false;
1062         ifmgd->csa_waiting_bcn = false;
1063
1064         ret = drv_post_channel_switch(sdata);
1065         if (ret) {
1066                 sdata_info(sdata,
1067                            "driver post channel switch failed, disconnecting\n");
1068                 ieee80211_queue_work(&local->hw,
1069                                      &ifmgd->csa_connection_drop_work);
1070                 return;
1071         }
1072
1073         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1074 }
1075
1076 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077 {
1078         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1080
1081         trace_api_chswitch_done(sdata, success);
1082         if (!success) {
1083                 sdata_info(sdata,
1084                            "driver channel switch failed, disconnecting\n");
1085                 ieee80211_queue_work(&sdata->local->hw,
1086                                      &ifmgd->csa_connection_drop_work);
1087         } else {
1088                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1089         }
1090 }
1091 EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
1093 static void ieee80211_chswitch_timer(unsigned long data)
1094 {
1095         struct ieee80211_sub_if_data *sdata =
1096                 (struct ieee80211_sub_if_data *) data;
1097
1098         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1099 }
1100
1101 static void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata)
1102 {
1103         struct sta_info *sta;
1104         u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;
1105
1106         rcu_read_lock();
1107         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
1108                 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
1109                     !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1110                         continue;
1111
1112                 ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr,
1113                                             NL80211_TDLS_TEARDOWN, reason,
1114                                             GFP_ATOMIC);
1115         }
1116         rcu_read_unlock();
1117 }
1118
1119 static void
1120 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1121                                  u64 timestamp, u32 device_timestamp,
1122                                  struct ieee802_11_elems *elems,
1123                                  bool beacon)
1124 {
1125         struct ieee80211_local *local = sdata->local;
1126         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1127         struct cfg80211_bss *cbss = ifmgd->associated;
1128         struct ieee80211_chanctx_conf *conf;
1129         struct ieee80211_chanctx *chanctx;
1130         enum ieee80211_band current_band;
1131         struct ieee80211_csa_ie csa_ie;
1132         struct ieee80211_channel_switch ch_switch;
1133         int res;
1134
1135         sdata_assert_lock(sdata);
1136
1137         if (!cbss)
1138                 return;
1139
1140         if (local->scanning)
1141                 return;
1142
1143         /* disregard subsequent announcements if we are already processing */
1144         if (sdata->vif.csa_active)
1145                 return;
1146
1147         current_band = cbss->channel->band;
1148         memset(&csa_ie, 0, sizeof(csa_ie));
1149         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1150                                            ifmgd->flags,
1151                                            ifmgd->associated->bssid, &csa_ie);
1152         if (res < 0)
1153                 ieee80211_queue_work(&local->hw,
1154                                      &ifmgd->csa_connection_drop_work);
1155         if (res)
1156                 return;
1157
1158         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1159                                      IEEE80211_CHAN_DISABLED)) {
1160                 sdata_info(sdata,
1161                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1162                            ifmgd->associated->bssid,
1163                            csa_ie.chandef.chan->center_freq,
1164                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1165                            csa_ie.chandef.center_freq2);
1166                 ieee80211_queue_work(&local->hw,
1167                                      &ifmgd->csa_connection_drop_work);
1168                 return;
1169         }
1170
1171         if (cfg80211_chandef_identical(&csa_ie.chandef,
1172                                        &sdata->vif.bss_conf.chandef)) {
1173                 if (ifmgd->csa_ignored_same_chan)
1174                         return;
1175                 sdata_info(sdata,
1176                            "AP %pM tries to chanswitch to same channel, ignore\n",
1177                            ifmgd->associated->bssid);
1178                 ifmgd->csa_ignored_same_chan = true;
1179                 return;
1180         }
1181
1182         /*
1183          * Drop all TDLS peers - either we disconnect or move to a different
1184          * channel from this point on. There's no telling what our peer will do.
1185          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1186          * have an incompatible wider chandef.
1187          */
1188         ieee80211_teardown_tdls_peers(sdata);
1189
1190         mutex_lock(&local->mtx);
1191         mutex_lock(&local->chanctx_mtx);
1192         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1193                                          lockdep_is_held(&local->chanctx_mtx));
1194         if (!conf) {
1195                 sdata_info(sdata,
1196                            "no channel context assigned to vif?, disconnecting\n");
1197                 goto drop_connection;
1198         }
1199
1200         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1201
1202         if (local->use_chanctx &&
1203             !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1204                 sdata_info(sdata,
1205                            "driver doesn't support chan-switch with channel contexts\n");
1206                 goto drop_connection;
1207         }
1208
1209         ch_switch.timestamp = timestamp;
1210         ch_switch.device_timestamp = device_timestamp;
1211         ch_switch.block_tx = csa_ie.mode;
1212         ch_switch.chandef = csa_ie.chandef;
1213         ch_switch.count = csa_ie.count;
1214
1215         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1216                 sdata_info(sdata,
1217                            "preparing for channel switch failed, disconnecting\n");
1218                 goto drop_connection;
1219         }
1220
1221         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1222                                             chanctx->mode, false);
1223         if (res) {
1224                 sdata_info(sdata,
1225                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1226                            res);
1227                 goto drop_connection;
1228         }
1229         mutex_unlock(&local->chanctx_mtx);
1230
1231         sdata->vif.csa_active = true;
1232         sdata->csa_chandef = csa_ie.chandef;
1233         sdata->csa_block_tx = csa_ie.mode;
1234         ifmgd->csa_ignored_same_chan = false;
1235
1236         if (sdata->csa_block_tx)
1237                 ieee80211_stop_vif_queues(local, sdata,
1238                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1239         mutex_unlock(&local->mtx);
1240
1241         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1242                                           csa_ie.count);
1243
1244         if (local->ops->channel_switch) {
1245                 /* use driver's channel switch callback */
1246                 drv_channel_switch(local, sdata, &ch_switch);
1247                 return;
1248         }
1249
1250         /* channel switch handled in software */
1251         if (csa_ie.count <= 1)
1252                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1253         else
1254                 mod_timer(&ifmgd->chswitch_timer,
1255                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1256                                          cbss->beacon_interval));
1257         return;
1258  drop_connection:
1259         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1260         mutex_unlock(&local->chanctx_mtx);
1261         mutex_unlock(&local->mtx);
1262 }
1263
1264 static bool
1265 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1266                                  struct ieee80211_channel *channel,
1267                                  const u8 *country_ie, u8 country_ie_len,
1268                                  const u8 *pwr_constr_elem,
1269                                  int *chan_pwr, int *pwr_reduction)
1270 {
1271         struct ieee80211_country_ie_triplet *triplet;
1272         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1273         int i, chan_increment;
1274         bool have_chan_pwr = false;
1275
1276         /* Invalid IE */
1277         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1278                 return false;
1279
1280         triplet = (void *)(country_ie + 3);
1281         country_ie_len -= 3;
1282
1283         switch (channel->band) {
1284         default:
1285                 WARN_ON_ONCE(1);
1286                 /* fall through */
1287         case IEEE80211_BAND_2GHZ:
1288         case IEEE80211_BAND_60GHZ:
1289                 chan_increment = 1;
1290                 break;
1291         case IEEE80211_BAND_5GHZ:
1292                 chan_increment = 4;
1293                 break;
1294         }
1295
1296         /* find channel */
1297         while (country_ie_len >= 3) {
1298                 u8 first_channel = triplet->chans.first_channel;
1299
1300                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1301                         goto next;
1302
1303                 for (i = 0; i < triplet->chans.num_channels; i++) {
1304                         if (first_channel + i * chan_increment == chan) {
1305                                 have_chan_pwr = true;
1306                                 *chan_pwr = triplet->chans.max_power;
1307                                 break;
1308                         }
1309                 }
1310                 if (have_chan_pwr)
1311                         break;
1312
1313  next:
1314                 triplet++;
1315                 country_ie_len -= 3;
1316         }
1317
1318         if (have_chan_pwr && pwr_constr_elem)
1319                 *pwr_reduction = *pwr_constr_elem;
1320         else
1321                 *pwr_reduction = 0;
1322
1323         return have_chan_pwr;
1324 }
1325
1326 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1327                                       struct ieee80211_channel *channel,
1328                                       const u8 *cisco_dtpc_ie,
1329                                       int *pwr_level)
1330 {
1331         /* From practical testing, the first data byte of the DTPC element
1332          * seems to contain the requested dBm level, and the CLI on Cisco
1333          * APs clearly state the range is -127 to 127 dBm, which indicates
1334          * a signed byte, although it seemingly never actually goes negative.
1335          * The other byte seems to always be zero.
1336          */
1337         *pwr_level = (__s8)cisco_dtpc_ie[4];
1338 }
1339
1340 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1341                                        struct ieee80211_channel *channel,
1342                                        struct ieee80211_mgmt *mgmt,
1343                                        const u8 *country_ie, u8 country_ie_len,
1344                                        const u8 *pwr_constr_ie,
1345                                        const u8 *cisco_dtpc_ie)
1346 {
1347         bool has_80211h_pwr = false, has_cisco_pwr = false;
1348         int chan_pwr = 0, pwr_reduction_80211h = 0;
1349         int pwr_level_cisco, pwr_level_80211h;
1350         int new_ap_level;
1351         __le16 capab = mgmt->u.probe_resp.capab_info;
1352
1353         if (country_ie &&
1354             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1355              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1356                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1357                         sdata, channel, country_ie, country_ie_len,
1358                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1359                 pwr_level_80211h =
1360                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1361         }
1362
1363         if (cisco_dtpc_ie) {
1364                 ieee80211_find_cisco_dtpc(
1365                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1366                 has_cisco_pwr = true;
1367         }
1368
1369         if (!has_80211h_pwr && !has_cisco_pwr)
1370                 return 0;
1371
1372         /* If we have both 802.11h and Cisco DTPC, apply both limits
1373          * by picking the smallest of the two power levels advertised.
1374          */
1375         if (has_80211h_pwr &&
1376             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1377                 sdata_dbg(sdata,
1378                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1379                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1380                           sdata->u.mgd.bssid);
1381                 new_ap_level = pwr_level_80211h;
1382         } else {  /* has_cisco_pwr is always true here. */
1383                 sdata_dbg(sdata,
1384                           "Limiting TX power to %d dBm as advertised by %pM\n",
1385                           pwr_level_cisco, sdata->u.mgd.bssid);
1386                 new_ap_level = pwr_level_cisco;
1387         }
1388
1389         if (sdata->ap_power_level == new_ap_level)
1390                 return 0;
1391
1392         sdata->ap_power_level = new_ap_level;
1393         if (__ieee80211_recalc_txpower(sdata))
1394                 return BSS_CHANGED_TXPOWER;
1395         return 0;
1396 }
1397
1398 /* powersave */
1399 static void ieee80211_enable_ps(struct ieee80211_local *local,
1400                                 struct ieee80211_sub_if_data *sdata)
1401 {
1402         struct ieee80211_conf *conf = &local->hw.conf;
1403
1404         /*
1405          * If we are scanning right now then the parameters will
1406          * take effect when scan finishes.
1407          */
1408         if (local->scanning)
1409                 return;
1410
1411         if (conf->dynamic_ps_timeout > 0 &&
1412             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1413                 mod_timer(&local->dynamic_ps_timer, jiffies +
1414                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1415         } else {
1416                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1417                         ieee80211_send_nullfunc(local, sdata, 1);
1418
1419                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1420                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1421                         return;
1422
1423                 conf->flags |= IEEE80211_CONF_PS;
1424                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1425         }
1426 }
1427
1428 static void ieee80211_change_ps(struct ieee80211_local *local)
1429 {
1430         struct ieee80211_conf *conf = &local->hw.conf;
1431
1432         if (local->ps_sdata) {
1433                 ieee80211_enable_ps(local, local->ps_sdata);
1434         } else if (conf->flags & IEEE80211_CONF_PS) {
1435                 conf->flags &= ~IEEE80211_CONF_PS;
1436                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1437                 del_timer_sync(&local->dynamic_ps_timer);
1438                 cancel_work_sync(&local->dynamic_ps_enable_work);
1439         }
1440 }
1441
1442 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1443 {
1444         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1445         struct sta_info *sta = NULL;
1446         bool authorized = false;
1447
1448         if (!mgd->powersave)
1449                 return false;
1450
1451         if (mgd->broken_ap)
1452                 return false;
1453
1454         if (!mgd->associated)
1455                 return false;
1456
1457         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1458                 return false;
1459
1460         if (!mgd->have_beacon)
1461                 return false;
1462
1463         rcu_read_lock();
1464         sta = sta_info_get(sdata, mgd->bssid);
1465         if (sta)
1466                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1467         rcu_read_unlock();
1468
1469         return authorized;
1470 }
1471
1472 /* need to hold RTNL or interface lock */
1473 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1474 {
1475         struct ieee80211_sub_if_data *sdata, *found = NULL;
1476         int count = 0;
1477         int timeout;
1478
1479         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1480                 local->ps_sdata = NULL;
1481                 return;
1482         }
1483
1484         list_for_each_entry(sdata, &local->interfaces, list) {
1485                 if (!ieee80211_sdata_running(sdata))
1486                         continue;
1487                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1488                         /* If an AP vif is found, then disable PS
1489                          * by setting the count to zero thereby setting
1490                          * ps_sdata to NULL.
1491                          */
1492                         count = 0;
1493                         break;
1494                 }
1495                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1496                         continue;
1497                 found = sdata;
1498                 count++;
1499         }
1500
1501         if (count == 1 && ieee80211_powersave_allowed(found)) {
1502                 s32 beaconint_us;
1503
1504                 if (latency < 0)
1505                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1506
1507                 beaconint_us = ieee80211_tu_to_usec(
1508                                         found->vif.bss_conf.beacon_int);
1509
1510                 timeout = local->dynamic_ps_forced_timeout;
1511                 if (timeout < 0) {
1512                         /*
1513                          * Go to full PSM if the user configures a very low
1514                          * latency requirement.
1515                          * The 2000 second value is there for compatibility
1516                          * until the PM_QOS_NETWORK_LATENCY is configured
1517                          * with real values.
1518                          */
1519                         if (latency > (1900 * USEC_PER_MSEC) &&
1520                             latency != (2000 * USEC_PER_SEC))
1521                                 timeout = 0;
1522                         else
1523                                 timeout = 100;
1524                 }
1525                 local->hw.conf.dynamic_ps_timeout = timeout;
1526
1527                 if (beaconint_us > latency) {
1528                         local->ps_sdata = NULL;
1529                 } else {
1530                         int maxslp = 1;
1531                         u8 dtimper = found->u.mgd.dtim_period;
1532
1533                         /* If the TIM IE is invalid, pretend the value is 1 */
1534                         if (!dtimper)
1535                                 dtimper = 1;
1536                         else if (dtimper > 1)
1537                                 maxslp = min_t(int, dtimper,
1538                                                     latency / beaconint_us);
1539
1540                         local->hw.conf.max_sleep_period = maxslp;
1541                         local->hw.conf.ps_dtim_period = dtimper;
1542                         local->ps_sdata = found;
1543                 }
1544         } else {
1545                 local->ps_sdata = NULL;
1546         }
1547
1548         ieee80211_change_ps(local);
1549 }
1550
1551 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1552 {
1553         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1554
1555         if (sdata->vif.bss_conf.ps != ps_allowed) {
1556                 sdata->vif.bss_conf.ps = ps_allowed;
1557                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1558         }
1559 }
1560
1561 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1562 {
1563         struct ieee80211_local *local =
1564                 container_of(work, struct ieee80211_local,
1565                              dynamic_ps_disable_work);
1566
1567         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1568                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1569                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1570         }
1571
1572         ieee80211_wake_queues_by_reason(&local->hw,
1573                                         IEEE80211_MAX_QUEUE_MAP,
1574                                         IEEE80211_QUEUE_STOP_REASON_PS,
1575                                         false);
1576 }
1577
1578 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1579 {
1580         struct ieee80211_local *local =
1581                 container_of(work, struct ieee80211_local,
1582                              dynamic_ps_enable_work);
1583         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1584         struct ieee80211_if_managed *ifmgd;
1585         unsigned long flags;
1586         int q;
1587
1588         /* can only happen when PS was just disabled anyway */
1589         if (!sdata)
1590                 return;
1591
1592         ifmgd = &sdata->u.mgd;
1593
1594         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1595                 return;
1596
1597         if (local->hw.conf.dynamic_ps_timeout > 0) {
1598                 /* don't enter PS if TX frames are pending */
1599                 if (drv_tx_frames_pending(local)) {
1600                         mod_timer(&local->dynamic_ps_timer, jiffies +
1601                                   msecs_to_jiffies(
1602                                   local->hw.conf.dynamic_ps_timeout));
1603                         return;
1604                 }
1605
1606                 /*
1607                  * transmission can be stopped by others which leads to
1608                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1609                  * is not the actual idle state.
1610                  */
1611                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1612                 for (q = 0; q < local->hw.queues; q++) {
1613                         if (local->queue_stop_reasons[q]) {
1614                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1615                                                        flags);
1616                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1617                                           msecs_to_jiffies(
1618                                           local->hw.conf.dynamic_ps_timeout));
1619                                 return;
1620                         }
1621                 }
1622                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1623         }
1624
1625         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1626             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1627                 if (drv_tx_frames_pending(local)) {
1628                         mod_timer(&local->dynamic_ps_timer, jiffies +
1629                                   msecs_to_jiffies(
1630                                   local->hw.conf.dynamic_ps_timeout));
1631                 } else {
1632                         ieee80211_send_nullfunc(local, sdata, 1);
1633                         /* Flush to get the tx status of nullfunc frame */
1634                         ieee80211_flush_queues(local, sdata, false);
1635                 }
1636         }
1637
1638         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1639               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1640             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1641                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1642                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1643                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1644         }
1645 }
1646
1647 void ieee80211_dynamic_ps_timer(unsigned long data)
1648 {
1649         struct ieee80211_local *local = (void *) data;
1650
1651         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1652 }
1653
1654 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1655 {
1656         struct delayed_work *delayed_work =
1657                 container_of(work, struct delayed_work, work);
1658         struct ieee80211_sub_if_data *sdata =
1659                 container_of(delayed_work, struct ieee80211_sub_if_data,
1660                              dfs_cac_timer_work);
1661         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1662
1663         mutex_lock(&sdata->local->mtx);
1664         if (sdata->wdev.cac_started) {
1665                 ieee80211_vif_release_channel(sdata);
1666                 cfg80211_cac_event(sdata->dev, &chandef,
1667                                    NL80211_RADAR_CAC_FINISHED,
1668                                    GFP_KERNEL);
1669         }
1670         mutex_unlock(&sdata->local->mtx);
1671 }
1672
1673 static bool
1674 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1675 {
1676         struct ieee80211_local *local = sdata->local;
1677         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1678         bool ret = false;
1679         int ac;
1680
1681         if (local->hw.queues < IEEE80211_NUM_ACS)
1682                 return false;
1683
1684         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1685                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1686                 int non_acm_ac;
1687                 unsigned long now = jiffies;
1688
1689                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1690                     tx_tspec->admitted_time &&
1691                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1692                         tx_tspec->consumed_tx_time = 0;
1693                         tx_tspec->time_slice_start = now;
1694
1695                         if (tx_tspec->downgraded)
1696                                 tx_tspec->action =
1697                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1698                 }
1699
1700                 switch (tx_tspec->action) {
1701                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1702                         /* take the original parameters */
1703                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1704                                 sdata_err(sdata,
1705                                           "failed to set TX queue parameters for queue %d\n",
1706                                           ac);
1707                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1708                         tx_tspec->downgraded = false;
1709                         ret = true;
1710                         break;
1711                 case TX_TSPEC_ACTION_DOWNGRADE:
1712                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1713                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714                                 ret = true;
1715                                 break;
1716                         }
1717                         /* downgrade next lower non-ACM AC */
1718                         for (non_acm_ac = ac + 1;
1719                              non_acm_ac < IEEE80211_NUM_ACS;
1720                              non_acm_ac++)
1721                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1722                                         break;
1723                         /* The loop will result in using BK even if it requires
1724                          * admission control, such configuration makes no sense
1725                          * and we have to transmit somehow - the AC selection
1726                          * does the same thing.
1727                          */
1728                         if (drv_conf_tx(local, sdata, ac,
1729                                         &sdata->tx_conf[non_acm_ac]))
1730                                 sdata_err(sdata,
1731                                           "failed to set TX queue parameters for queue %d\n",
1732                                           ac);
1733                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1734                         ret = true;
1735                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1736                                 tx_tspec->time_slice_start + HZ - now + 1);
1737                         break;
1738                 case TX_TSPEC_ACTION_NONE:
1739                         /* nothing now */
1740                         break;
1741                 }
1742         }
1743
1744         return ret;
1745 }
1746
1747 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1748 {
1749         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1750                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1751 }
1752
1753 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1754 {
1755         struct ieee80211_sub_if_data *sdata;
1756
1757         sdata = container_of(work, struct ieee80211_sub_if_data,
1758                              u.mgd.tx_tspec_wk.work);
1759         ieee80211_sta_handle_tspec_ac_params(sdata);
1760 }
1761
1762 /* MLME */
1763 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1764                                      struct ieee80211_sub_if_data *sdata,
1765                                      const u8 *wmm_param, size_t wmm_param_len)
1766 {
1767         struct ieee80211_tx_queue_params params;
1768         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1769         size_t left;
1770         int count;
1771         const u8 *pos;
1772         u8 uapsd_queues = 0;
1773
1774         if (!local->ops->conf_tx)
1775                 return false;
1776
1777         if (local->hw.queues < IEEE80211_NUM_ACS)
1778                 return false;
1779
1780         if (!wmm_param)
1781                 return false;
1782
1783         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1784                 return false;
1785
1786         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1787                 uapsd_queues = ifmgd->uapsd_queues;
1788
1789         count = wmm_param[6] & 0x0f;
1790         if (count == ifmgd->wmm_last_param_set)
1791                 return false;
1792         ifmgd->wmm_last_param_set = count;
1793
1794         pos = wmm_param + 8;
1795         left = wmm_param_len - 8;
1796
1797         memset(&params, 0, sizeof(params));
1798
1799         sdata->wmm_acm = 0;
1800         for (; left >= 4; left -= 4, pos += 4) {
1801                 int aci = (pos[0] >> 5) & 0x03;
1802                 int acm = (pos[0] >> 4) & 0x01;
1803                 bool uapsd = false;
1804                 int queue;
1805
1806                 switch (aci) {
1807                 case 1: /* AC_BK */
1808                         queue = 3;
1809                         if (acm)
1810                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1811                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1812                                 uapsd = true;
1813                         break;
1814                 case 2: /* AC_VI */
1815                         queue = 1;
1816                         if (acm)
1817                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1818                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1819                                 uapsd = true;
1820                         break;
1821                 case 3: /* AC_VO */
1822                         queue = 0;
1823                         if (acm)
1824                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1825                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1826                                 uapsd = true;
1827                         break;
1828                 case 0: /* AC_BE */
1829                 default:
1830                         queue = 2;
1831                         if (acm)
1832                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1833                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1834                                 uapsd = true;
1835                         break;
1836                 }
1837
1838                 params.aifs = pos[0] & 0x0f;
1839                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1840                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1841                 params.txop = get_unaligned_le16(pos + 2);
1842                 params.acm = acm;
1843                 params.uapsd = uapsd;
1844
1845                 mlme_dbg(sdata,
1846                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1847                          queue, aci, acm,
1848                          params.aifs, params.cw_min, params.cw_max,
1849                          params.txop, params.uapsd,
1850                          ifmgd->tx_tspec[queue].downgraded);
1851                 sdata->tx_conf[queue] = params;
1852                 if (!ifmgd->tx_tspec[queue].downgraded &&
1853                     drv_conf_tx(local, sdata, queue, &params))
1854                         sdata_err(sdata,
1855                                   "failed to set TX queue parameters for queue %d\n",
1856                                   queue);
1857         }
1858
1859         /* enable WMM or activate new settings */
1860         sdata->vif.bss_conf.qos = true;
1861         return true;
1862 }
1863
1864 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1865 {
1866         lockdep_assert_held(&sdata->local->mtx);
1867
1868         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1869         ieee80211_run_deferred_scan(sdata->local);
1870 }
1871
1872 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1873 {
1874         mutex_lock(&sdata->local->mtx);
1875         __ieee80211_stop_poll(sdata);
1876         mutex_unlock(&sdata->local->mtx);
1877 }
1878
1879 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1880                                            u16 capab, bool erp_valid, u8 erp)
1881 {
1882         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1883         u32 changed = 0;
1884         bool use_protection;
1885         bool use_short_preamble;
1886         bool use_short_slot;
1887
1888         if (erp_valid) {
1889                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1890                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1891         } else {
1892                 use_protection = false;
1893                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1894         }
1895
1896         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1897         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1898                 use_short_slot = true;
1899
1900         if (use_protection != bss_conf->use_cts_prot) {
1901                 bss_conf->use_cts_prot = use_protection;
1902                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1903         }
1904
1905         if (use_short_preamble != bss_conf->use_short_preamble) {
1906                 bss_conf->use_short_preamble = use_short_preamble;
1907                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1908         }
1909
1910         if (use_short_slot != bss_conf->use_short_slot) {
1911                 bss_conf->use_short_slot = use_short_slot;
1912                 changed |= BSS_CHANGED_ERP_SLOT;
1913         }
1914
1915         return changed;
1916 }
1917
1918 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1919                                      struct cfg80211_bss *cbss,
1920                                      u32 bss_info_changed)
1921 {
1922         struct ieee80211_bss *bss = (void *)cbss->priv;
1923         struct ieee80211_local *local = sdata->local;
1924         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1925
1926         bss_info_changed |= BSS_CHANGED_ASSOC;
1927         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1928                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1929
1930         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1931                 beacon_loss_count * bss_conf->beacon_int));
1932
1933         sdata->u.mgd.associated = cbss;
1934         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1935
1936         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1937
1938         if (sdata->vif.p2p) {
1939                 const struct cfg80211_bss_ies *ies;
1940
1941                 rcu_read_lock();
1942                 ies = rcu_dereference(cbss->ies);
1943                 if (ies) {
1944                         int ret;
1945
1946                         ret = cfg80211_get_p2p_attr(
1947                                         ies->data, ies->len,
1948                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1949                                         (u8 *) &bss_conf->p2p_noa_attr,
1950                                         sizeof(bss_conf->p2p_noa_attr));
1951                         if (ret >= 2) {
1952                                 sdata->u.mgd.p2p_noa_index =
1953                                         bss_conf->p2p_noa_attr.index;
1954                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1955                         }
1956                 }
1957                 rcu_read_unlock();
1958         }
1959
1960         /* just to be sure */
1961         ieee80211_stop_poll(sdata);
1962
1963         ieee80211_led_assoc(local, 1);
1964
1965         if (sdata->u.mgd.have_beacon) {
1966                 /*
1967                  * If the AP is buggy we may get here with no DTIM period
1968                  * known, so assume it's 1 which is the only safe assumption
1969                  * in that case, although if the TIM IE is broken powersave
1970                  * probably just won't work at all.
1971                  */
1972                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1973                 bss_conf->beacon_rate = bss->beacon_rate;
1974                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1975         } else {
1976                 bss_conf->beacon_rate = NULL;
1977                 bss_conf->dtim_period = 0;
1978         }
1979
1980         bss_conf->assoc = 1;
1981
1982         /* Tell the driver to monitor connection quality (if supported) */
1983         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1984             bss_conf->cqm_rssi_thold)
1985                 bss_info_changed |= BSS_CHANGED_CQM;
1986
1987         /* Enable ARP filtering */
1988         if (bss_conf->arp_addr_cnt)
1989                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1990
1991         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1992
1993         mutex_lock(&local->iflist_mtx);
1994         ieee80211_recalc_ps(local, -1);
1995         mutex_unlock(&local->iflist_mtx);
1996
1997         ieee80211_recalc_smps(sdata);
1998         ieee80211_recalc_ps_vif(sdata);
1999
2000         netif_carrier_on(sdata->dev);
2001 }
2002
2003 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2004                                    u16 stype, u16 reason, bool tx,
2005                                    u8 *frame_buf)
2006 {
2007         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2008         struct ieee80211_local *local = sdata->local;
2009         u32 changed = 0;
2010
2011         sdata_assert_lock(sdata);
2012
2013         if (WARN_ON_ONCE(tx && !frame_buf))
2014                 return;
2015
2016         if (WARN_ON(!ifmgd->associated))
2017                 return;
2018
2019         ieee80211_stop_poll(sdata);
2020
2021         ifmgd->associated = NULL;
2022         netif_carrier_off(sdata->dev);
2023
2024         /*
2025          * if we want to get out of ps before disassoc (why?) we have
2026          * to do it before sending disassoc, as otherwise the null-packet
2027          * won't be valid.
2028          */
2029         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2030                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2031                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2032         }
2033         local->ps_sdata = NULL;
2034
2035         /* disable per-vif ps */
2036         ieee80211_recalc_ps_vif(sdata);
2037
2038         /* make sure ongoing transmission finishes */
2039         synchronize_net();
2040
2041         /*
2042          * drop any frame before deauth/disassoc, this can be data or
2043          * management frame. Since we are disconnecting, we should not
2044          * insist sending these frames which can take time and delay
2045          * the disconnection and possible the roaming.
2046          */
2047         if (tx)
2048                 ieee80211_flush_queues(local, sdata, true);
2049
2050         /* deauthenticate/disassociate now */
2051         if (tx || frame_buf)
2052                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2053                                                reason, tx, frame_buf);
2054
2055         /* flush out frame - make sure the deauth was actually sent */
2056         if (tx)
2057                 ieee80211_flush_queues(local, sdata, false);
2058
2059         /* clear bssid only after building the needed mgmt frames */
2060         eth_zero_addr(ifmgd->bssid);
2061
2062         /* remove AP and TDLS peers */
2063         sta_info_flush(sdata);
2064
2065         /* finally reset all BSS / config parameters */
2066         changed |= ieee80211_reset_erp_info(sdata);
2067
2068         ieee80211_led_assoc(local, 0);
2069         changed |= BSS_CHANGED_ASSOC;
2070         sdata->vif.bss_conf.assoc = false;
2071
2072         ifmgd->p2p_noa_index = -1;
2073         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2074                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2075
2076         /* on the next assoc, re-program HT/VHT parameters */
2077         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2078         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2079         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2080         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2081
2082         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2083
2084         del_timer_sync(&local->dynamic_ps_timer);
2085         cancel_work_sync(&local->dynamic_ps_enable_work);
2086
2087         /* Disable ARP filtering */
2088         if (sdata->vif.bss_conf.arp_addr_cnt)
2089                 changed |= BSS_CHANGED_ARP_FILTER;
2090
2091         sdata->vif.bss_conf.qos = false;
2092         changed |= BSS_CHANGED_QOS;
2093
2094         /* The BSSID (not really interesting) and HT changed */
2095         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2096         ieee80211_bss_info_change_notify(sdata, changed);
2097
2098         /* disassociated - set to defaults now */
2099         ieee80211_set_wmm_default(sdata, false);
2100
2101         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2102         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2103         del_timer_sync(&sdata->u.mgd.timer);
2104         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2105
2106         sdata->vif.bss_conf.dtim_period = 0;
2107         sdata->vif.bss_conf.beacon_rate = NULL;
2108
2109         ifmgd->have_beacon = false;
2110
2111         ifmgd->flags = 0;
2112         mutex_lock(&local->mtx);
2113         ieee80211_vif_release_channel(sdata);
2114
2115         sdata->vif.csa_active = false;
2116         ifmgd->csa_waiting_bcn = false;
2117         ifmgd->csa_ignored_same_chan = false;
2118         if (sdata->csa_block_tx) {
2119                 ieee80211_wake_vif_queues(local, sdata,
2120                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2121                 sdata->csa_block_tx = false;
2122         }
2123         mutex_unlock(&local->mtx);
2124
2125         /* existing TX TSPEC sessions no longer exist */
2126         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2127         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2128
2129         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2130 }
2131
2132 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2133                              struct ieee80211_hdr *hdr)
2134 {
2135         /*
2136          * We can postpone the mgd.timer whenever receiving unicast frames
2137          * from AP because we know that the connection is working both ways
2138          * at that time. But multicast frames (and hence also beacons) must
2139          * be ignored here, because we need to trigger the timer during
2140          * data idle periods for sending the periodic probe request to the
2141          * AP we're connected to.
2142          */
2143         if (is_multicast_ether_addr(hdr->addr1))
2144                 return;
2145
2146         ieee80211_sta_reset_conn_monitor(sdata);
2147 }
2148
2149 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2150 {
2151         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2152         struct ieee80211_local *local = sdata->local;
2153
2154         mutex_lock(&local->mtx);
2155         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2156                 goto out;
2157
2158         __ieee80211_stop_poll(sdata);
2159
2160         mutex_lock(&local->iflist_mtx);
2161         ieee80211_recalc_ps(local, -1);
2162         mutex_unlock(&local->iflist_mtx);
2163
2164         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2165                 goto out;
2166
2167         /*
2168          * We've received a probe response, but are not sure whether
2169          * we have or will be receiving any beacons or data, so let's
2170          * schedule the timers again, just in case.
2171          */
2172         ieee80211_sta_reset_beacon_monitor(sdata);
2173
2174         mod_timer(&ifmgd->conn_mon_timer,
2175                   round_jiffies_up(jiffies +
2176                                    IEEE80211_CONNECTION_IDLE_TIME));
2177 out:
2178         mutex_unlock(&local->mtx);
2179 }
2180
2181 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2182                                            struct ieee80211_hdr *hdr,
2183                                            u16 tx_time)
2184 {
2185         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2186         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2187         int ac = ieee80211_ac_from_tid(tid);
2188         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2189         unsigned long now = jiffies;
2190
2191         if (likely(!tx_tspec->admitted_time))
2192                 return;
2193
2194         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2195                 tx_tspec->consumed_tx_time = 0;
2196                 tx_tspec->time_slice_start = now;
2197
2198                 if (tx_tspec->downgraded) {
2199                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2200                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201                 }
2202         }
2203
2204         if (tx_tspec->downgraded)
2205                 return;
2206
2207         tx_tspec->consumed_tx_time += tx_time;
2208
2209         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2210                 tx_tspec->downgraded = true;
2211                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2212                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2213         }
2214 }
2215
2216 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2217                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2218 {
2219         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2220
2221         if (!ieee80211_is_data(hdr->frame_control))
2222             return;
2223
2224         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2225             sdata->u.mgd.probe_send_count > 0) {
2226                 if (ack)
2227                         ieee80211_sta_reset_conn_monitor(sdata);
2228                 else
2229                         sdata->u.mgd.nullfunc_failed = true;
2230                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2231                 return;
2232         }
2233
2234         if (ack)
2235                 ieee80211_sta_reset_conn_monitor(sdata);
2236 }
2237
2238 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2239 {
2240         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2241         const u8 *ssid;
2242         u8 *dst = ifmgd->associated->bssid;
2243         u8 unicast_limit = max(1, max_probe_tries - 3);
2244
2245         /*
2246          * Try sending broadcast probe requests for the last three
2247          * probe requests after the first ones failed since some
2248          * buggy APs only support broadcast probe requests.
2249          */
2250         if (ifmgd->probe_send_count >= unicast_limit)
2251                 dst = NULL;
2252
2253         /*
2254          * When the hardware reports an accurate Tx ACK status, it's
2255          * better to send a nullfunc frame instead of a probe request,
2256          * as it will kick us off the AP quickly if we aren't associated
2257          * anymore. The timeout will be reset if the frame is ACKed by
2258          * the AP.
2259          */
2260         ifmgd->probe_send_count++;
2261
2262         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2263                 ifmgd->nullfunc_failed = false;
2264                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2265         } else {
2266                 int ssid_len;
2267
2268                 rcu_read_lock();
2269                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2270                 if (WARN_ON_ONCE(ssid == NULL))
2271                         ssid_len = 0;
2272                 else
2273                         ssid_len = ssid[1];
2274
2275                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2276                                          ssid + 2, ssid_len, NULL,
2277                                          0, (u32) -1, true, 0,
2278                                          ifmgd->associated->channel, false);
2279                 rcu_read_unlock();
2280         }
2281
2282         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2283         run_again(sdata, ifmgd->probe_timeout);
2284 }
2285
2286 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2287                                    bool beacon)
2288 {
2289         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2290         bool already = false;
2291
2292         if (!ieee80211_sdata_running(sdata))
2293                 return;
2294
2295         sdata_lock(sdata);
2296
2297         if (!ifmgd->associated)
2298                 goto out;
2299
2300         mutex_lock(&sdata->local->mtx);
2301
2302         if (sdata->local->tmp_channel || sdata->local->scanning) {
2303                 mutex_unlock(&sdata->local->mtx);
2304                 goto out;
2305         }
2306
2307         if (beacon) {
2308                 mlme_dbg_ratelimited(sdata,
2309                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2310                                      beacon_loss_count);
2311
2312                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2313         }
2314
2315         /*
2316          * The driver/our work has already reported this event or the
2317          * connection monitoring has kicked in and we have already sent
2318          * a probe request. Or maybe the AP died and the driver keeps
2319          * reporting until we disassociate...
2320          *
2321          * In either case we have to ignore the current call to this
2322          * function (except for setting the correct probe reason bit)
2323          * because otherwise we would reset the timer every time and
2324          * never check whether we received a probe response!
2325          */
2326         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2327                 already = true;
2328
2329         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2330
2331         mutex_unlock(&sdata->local->mtx);
2332
2333         if (already)
2334                 goto out;
2335
2336         mutex_lock(&sdata->local->iflist_mtx);
2337         ieee80211_recalc_ps(sdata->local, -1);
2338         mutex_unlock(&sdata->local->iflist_mtx);
2339
2340         ifmgd->probe_send_count = 0;
2341         ieee80211_mgd_probe_ap_send(sdata);
2342  out:
2343         sdata_unlock(sdata);
2344 }
2345
2346 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2347                                           struct ieee80211_vif *vif)
2348 {
2349         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2350         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2351         struct cfg80211_bss *cbss;
2352         struct sk_buff *skb;
2353         const u8 *ssid;
2354         int ssid_len;
2355
2356         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2357                 return NULL;
2358
2359         sdata_assert_lock(sdata);
2360
2361         if (ifmgd->associated)
2362                 cbss = ifmgd->associated;
2363         else if (ifmgd->auth_data)
2364                 cbss = ifmgd->auth_data->bss;
2365         else if (ifmgd->assoc_data)
2366                 cbss = ifmgd->assoc_data->bss;
2367         else
2368                 return NULL;
2369
2370         rcu_read_lock();
2371         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2372         if (WARN_ON_ONCE(ssid == NULL))
2373                 ssid_len = 0;
2374         else
2375                 ssid_len = ssid[1];
2376
2377         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2378                                         (u32) -1, cbss->channel,
2379                                         ssid + 2, ssid_len,
2380                                         NULL, 0, true);
2381         rcu_read_unlock();
2382
2383         return skb;
2384 }
2385 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2386
2387 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2388                                         const u8 *buf, size_t len, bool tx,
2389                                         u16 reason)
2390 {
2391         struct ieee80211_event event = {
2392                 .type = MLME_EVENT,
2393                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2394                 .u.mlme.reason = reason,
2395         };
2396
2397         if (tx)
2398                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2399         else
2400                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2401
2402         drv_event_callback(sdata->local, sdata, &event);
2403 }
2404
2405 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2406 {
2407         struct ieee80211_local *local = sdata->local;
2408         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2409         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2410
2411         sdata_lock(sdata);
2412         if (!ifmgd->associated) {
2413                 sdata_unlock(sdata);
2414                 return;
2415         }
2416
2417         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2418                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2419                                true, frame_buf);
2420         mutex_lock(&local->mtx);
2421         sdata->vif.csa_active = false;
2422         ifmgd->csa_waiting_bcn = false;
2423         if (sdata->csa_block_tx) {
2424                 ieee80211_wake_vif_queues(local, sdata,
2425                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2426                 sdata->csa_block_tx = false;
2427         }
2428         mutex_unlock(&local->mtx);
2429
2430         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2431                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2432
2433         sdata_unlock(sdata);
2434 }
2435
2436 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2437 {
2438         struct ieee80211_sub_if_data *sdata =
2439                 container_of(work, struct ieee80211_sub_if_data,
2440                              u.mgd.beacon_connection_loss_work);
2441         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2442         struct sta_info *sta;
2443
2444         if (ifmgd->associated) {
2445                 rcu_read_lock();
2446                 sta = sta_info_get(sdata, ifmgd->bssid);
2447                 if (sta)
2448                         sta->beacon_loss_count++;
2449                 rcu_read_unlock();
2450         }
2451
2452         if (ifmgd->connection_loss) {
2453                 sdata_info(sdata, "Connection to AP %pM lost\n",
2454                            ifmgd->bssid);
2455                 __ieee80211_disconnect(sdata);
2456         } else {
2457                 ieee80211_mgd_probe_ap(sdata, true);
2458         }
2459 }
2460
2461 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2462 {
2463         struct ieee80211_sub_if_data *sdata =
2464                 container_of(work, struct ieee80211_sub_if_data,
2465                              u.mgd.csa_connection_drop_work);
2466
2467         __ieee80211_disconnect(sdata);
2468 }
2469
2470 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2471 {
2472         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2473         struct ieee80211_hw *hw = &sdata->local->hw;
2474
2475         trace_api_beacon_loss(sdata);
2476
2477         sdata->u.mgd.connection_loss = false;
2478         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2479 }
2480 EXPORT_SYMBOL(ieee80211_beacon_loss);
2481
2482 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2483 {
2484         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2485         struct ieee80211_hw *hw = &sdata->local->hw;
2486
2487         trace_api_connection_loss(sdata);
2488
2489         sdata->u.mgd.connection_loss = true;
2490         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2491 }
2492 EXPORT_SYMBOL(ieee80211_connection_loss);
2493
2494
2495 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2496                                         bool assoc)
2497 {
2498         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2499
2500         sdata_assert_lock(sdata);
2501
2502         if (!assoc) {
2503                 /*
2504                  * we are not authenticated yet, the only timer that could be
2505                  * running is the timeout for the authentication response which
2506                  * which is not relevant anymore.
2507                  */
2508                 del_timer_sync(&sdata->u.mgd.timer);
2509                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2510
2511                 eth_zero_addr(sdata->u.mgd.bssid);
2512                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2513                 sdata->u.mgd.flags = 0;
2514                 mutex_lock(&sdata->local->mtx);
2515                 ieee80211_vif_release_channel(sdata);
2516                 mutex_unlock(&sdata->local->mtx);
2517         }
2518
2519         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2520         kfree(auth_data);
2521         sdata->u.mgd.auth_data = NULL;
2522 }
2523
2524 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2525                                      struct ieee80211_mgmt *mgmt, size_t len)
2526 {
2527         struct ieee80211_local *local = sdata->local;
2528         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2529         u8 *pos;
2530         struct ieee802_11_elems elems;
2531         u32 tx_flags = 0;
2532
2533         pos = mgmt->u.auth.variable;
2534         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2535         if (!elems.challenge)
2536                 return;
2537         auth_data->expected_transaction = 4;
2538         drv_mgd_prepare_tx(sdata->local, sdata);
2539         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2540                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2541                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2542         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2543                             elems.challenge - 2, elems.challenge_len + 2,
2544                             auth_data->bss->bssid, auth_data->bss->bssid,
2545                             auth_data->key, auth_data->key_len,
2546                             auth_data->key_idx, tx_flags);
2547 }
2548
2549 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2550                                    struct ieee80211_mgmt *mgmt, size_t len)
2551 {
2552         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2553         u8 bssid[ETH_ALEN];
2554         u16 auth_alg, auth_transaction, status_code;
2555         struct sta_info *sta;
2556         struct ieee80211_event event = {
2557                 .type = MLME_EVENT,
2558                 .u.mlme.data = AUTH_EVENT,
2559         };
2560
2561         sdata_assert_lock(sdata);
2562
2563         if (len < 24 + 6)
2564                 return;
2565
2566         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2567                 return;
2568
2569         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2570
2571         if (!ether_addr_equal(bssid, mgmt->bssid))
2572                 return;
2573
2574         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2575         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2576         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2577
2578         if (auth_alg != ifmgd->auth_data->algorithm ||
2579             auth_transaction != ifmgd->auth_data->expected_transaction) {
2580                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2581                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2582                            auth_transaction,
2583                            ifmgd->auth_data->expected_transaction);
2584                 return;
2585         }
2586
2587         if (status_code != WLAN_STATUS_SUCCESS) {
2588                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2589                            mgmt->sa, status_code);
2590                 ieee80211_destroy_auth_data(sdata, false);
2591                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2592                 event.u.mlme.status = MLME_DENIED;
2593                 event.u.mlme.reason = status_code;
2594                 drv_event_callback(sdata->local, sdata, &event);
2595                 return;
2596         }
2597
2598         switch (ifmgd->auth_data->algorithm) {
2599         case WLAN_AUTH_OPEN:
2600         case WLAN_AUTH_LEAP:
2601         case WLAN_AUTH_FT:
2602         case WLAN_AUTH_SAE:
2603                 break;
2604         case WLAN_AUTH_SHARED_KEY:
2605                 if (ifmgd->auth_data->expected_transaction != 4) {
2606                         ieee80211_auth_challenge(sdata, mgmt, len);
2607                         /* need another frame */
2608                         return;
2609                 }
2610                 break;
2611         default:
2612                 WARN_ONCE(1, "invalid auth alg %d",
2613                           ifmgd->auth_data->algorithm);
2614                 return;
2615         }
2616
2617         event.u.mlme.status = MLME_SUCCESS;
2618         drv_event_callback(sdata->local, sdata, &event);
2619         sdata_info(sdata, "authenticated\n");
2620         ifmgd->auth_data->done = true;
2621         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2622         ifmgd->auth_data->timeout_started = true;
2623         run_again(sdata, ifmgd->auth_data->timeout);
2624
2625         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2626             ifmgd->auth_data->expected_transaction != 2) {
2627                 /*
2628                  * Report auth frame to user space for processing since another
2629                  * round of Authentication frames is still needed.
2630                  */
2631                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2632                 return;
2633         }
2634
2635         /* move station state to auth */
2636         mutex_lock(&sdata->local->sta_mtx);
2637         sta = sta_info_get(sdata, bssid);
2638         if (!sta) {
2639                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2640                 goto out_err;
2641         }
2642         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2643                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2644                 goto out_err;
2645         }
2646         mutex_unlock(&sdata->local->sta_mtx);
2647
2648         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2649         return;
2650  out_err:
2651         mutex_unlock(&sdata->local->sta_mtx);
2652         /* ignore frame -- wait for timeout */
2653 }
2654
2655 #define case_WLAN(type) \
2656         case WLAN_REASON_##type: return #type
2657
2658 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2659 {
2660         switch (reason_code) {
2661         case_WLAN(UNSPECIFIED);
2662         case_WLAN(PREV_AUTH_NOT_VALID);
2663         case_WLAN(DEAUTH_LEAVING);
2664         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2665         case_WLAN(DISASSOC_AP_BUSY);
2666         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2667         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2668         case_WLAN(DISASSOC_STA_HAS_LEFT);
2669         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2670         case_WLAN(DISASSOC_BAD_POWER);
2671         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2672         case_WLAN(INVALID_IE);
2673         case_WLAN(MIC_FAILURE);
2674         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2675         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2676         case_WLAN(IE_DIFFERENT);
2677         case_WLAN(INVALID_GROUP_CIPHER);
2678         case_WLAN(INVALID_PAIRWISE_CIPHER);
2679         case_WLAN(INVALID_AKMP);
2680         case_WLAN(UNSUPP_RSN_VERSION);
2681         case_WLAN(INVALID_RSN_IE_CAP);
2682         case_WLAN(IEEE8021X_FAILED);
2683         case_WLAN(CIPHER_SUITE_REJECTED);
2684         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2685         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2686         case_WLAN(DISASSOC_LOW_ACK);
2687         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2688         case_WLAN(QSTA_LEAVE_QBSS);
2689         case_WLAN(QSTA_NOT_USE);
2690         case_WLAN(QSTA_REQUIRE_SETUP);
2691         case_WLAN(QSTA_TIMEOUT);
2692         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2693         case_WLAN(MESH_PEER_CANCELED);
2694         case_WLAN(MESH_MAX_PEERS);
2695         case_WLAN(MESH_CONFIG);
2696         case_WLAN(MESH_CLOSE);
2697         case_WLAN(MESH_MAX_RETRIES);
2698         case_WLAN(MESH_CONFIRM_TIMEOUT);
2699         case_WLAN(MESH_INVALID_GTK);
2700         case_WLAN(MESH_INCONSISTENT_PARAM);
2701         case_WLAN(MESH_INVALID_SECURITY);
2702         case_WLAN(MESH_PATH_ERROR);
2703         case_WLAN(MESH_PATH_NOFORWARD);
2704         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2705         case_WLAN(MAC_EXISTS_IN_MBSS);
2706         case_WLAN(MESH_CHAN_REGULATORY);
2707         case_WLAN(MESH_CHAN);
2708         default: return "<unknown>";
2709         }
2710 }
2711
2712 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2713                                      struct ieee80211_mgmt *mgmt, size_t len)
2714 {
2715         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2716         const u8 *bssid = NULL;
2717         u16 reason_code;
2718
2719         sdata_assert_lock(sdata);
2720
2721         if (len < 24 + 2)
2722                 return;
2723
2724         if (!ifmgd->associated ||
2725             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2726                 return;
2727
2728         bssid = ifmgd->associated->bssid;
2729
2730         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2731
2732         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2733                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2734
2735         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2736
2737         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2738 }
2739
2740
2741 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2742                                        struct ieee80211_mgmt *mgmt, size_t len)
2743 {
2744         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2745         u16 reason_code;
2746
2747         sdata_assert_lock(sdata);
2748
2749         if (len < 24 + 2)
2750                 return;
2751
2752         if (!ifmgd->associated ||
2753             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2754                 return;
2755
2756         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2757
2758         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2759                    mgmt->sa, reason_code);
2760
2761         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2762
2763         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2764 }
2765
2766 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2767                                 u8 *supp_rates, unsigned int supp_rates_len,
2768                                 u32 *rates, u32 *basic_rates,
2769                                 bool *have_higher_than_11mbit,
2770                                 int *min_rate, int *min_rate_index,
2771                                 int shift, u32 rate_flags)
2772 {
2773         int i, j;
2774
2775         for (i = 0; i < supp_rates_len; i++) {
2776                 int rate = supp_rates[i] & 0x7f;
2777                 bool is_basic = !!(supp_rates[i] & 0x80);
2778
2779                 if ((rate * 5 * (1 << shift)) > 110)
2780                         *have_higher_than_11mbit = true;
2781
2782                 /*
2783                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2784                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2785                  *
2786                  * Note: Even through the membership selector and the basic
2787                  *       rate flag share the same bit, they are not exactly
2788                  *       the same.
2789                  */
2790                 if (!!(supp_rates[i] & 0x80) &&
2791                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2792                         continue;
2793
2794                 for (j = 0; j < sband->n_bitrates; j++) {
2795                         struct ieee80211_rate *br;
2796                         int brate;
2797
2798                         br = &sband->bitrates[j];
2799                         if ((rate_flags & br->flags) != rate_flags)
2800                                 continue;
2801
2802                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2803                         if (brate == rate) {
2804                                 *rates |= BIT(j);
2805                                 if (is_basic)
2806                                         *basic_rates |= BIT(j);
2807                                 if ((rate * 5) < *min_rate) {
2808                                         *min_rate = rate * 5;
2809                                         *min_rate_index = j;
2810                                 }
2811                                 break;
2812                         }
2813                 }
2814         }
2815 }
2816
2817 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2818                                          bool assoc)
2819 {
2820         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2821
2822         sdata_assert_lock(sdata);
2823
2824         if (!assoc) {
2825                 /*
2826                  * we are not associated yet, the only timer that could be
2827                  * running is the timeout for the association response which
2828                  * which is not relevant anymore.
2829                  */
2830                 del_timer_sync(&sdata->u.mgd.timer);
2831                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2832
2833                 eth_zero_addr(sdata->u.mgd.bssid);
2834                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2835                 sdata->u.mgd.flags = 0;
2836                 mutex_lock(&sdata->local->mtx);
2837                 ieee80211_vif_release_channel(sdata);
2838                 mutex_unlock(&sdata->local->mtx);
2839         }
2840
2841         kfree(assoc_data);
2842         sdata->u.mgd.assoc_data = NULL;
2843 }
2844
2845 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2846                                     struct cfg80211_bss *cbss,
2847                                     struct ieee80211_mgmt *mgmt, size_t len)
2848 {
2849         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2850         struct ieee80211_local *local = sdata->local;
2851         struct ieee80211_supported_band *sband;
2852         struct sta_info *sta;
2853         u8 *pos;
2854         u16 capab_info, aid;
2855         struct ieee802_11_elems elems;
2856         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2857         const struct cfg80211_bss_ies *bss_ies = NULL;
2858         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2859         u32 changed = 0;
2860         int err;
2861         bool ret;
2862
2863         /* AssocResp and ReassocResp have identical structure */
2864
2865         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2866         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2867
2868         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2869                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2870                            aid);
2871         aid &= ~(BIT(15) | BIT(14));
2872
2873         ifmgd->broken_ap = false;
2874
2875         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2876                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2877                            aid);
2878                 aid = 0;
2879                 ifmgd->broken_ap = true;
2880         }
2881
2882         pos = mgmt->u.assoc_resp.variable;
2883         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2884
2885         if (!elems.supp_rates) {
2886                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2887                 return false;
2888         }
2889
2890         ifmgd->aid = aid;
2891         ifmgd->tdls_chan_switch_prohibited =
2892                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2893                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2894
2895         /*
2896          * Some APs are erroneously not including some information in their
2897          * (re)association response frames. Try to recover by using the data
2898          * from the beacon or probe response. This seems to afflict mobile
2899          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2900          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2901          */
2902         if ((assoc_data->wmm && !elems.wmm_param) ||
2903             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2904              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2905             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2906              (!elems.vht_cap_elem || !elems.vht_operation))) {
2907                 const struct cfg80211_bss_ies *ies;
2908                 struct ieee802_11_elems bss_elems;
2909
2910                 rcu_read_lock();
2911                 ies = rcu_dereference(cbss->ies);
2912                 if (ies)
2913                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2914                                           GFP_ATOMIC);
2915                 rcu_read_unlock();
2916                 if (!bss_ies)
2917                         return false;
2918
2919                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2920                                        false, &bss_elems);
2921                 if (assoc_data->wmm &&
2922                     !elems.wmm_param && bss_elems.wmm_param) {
2923                         elems.wmm_param = bss_elems.wmm_param;
2924                         sdata_info(sdata,
2925                                    "AP bug: WMM param missing from AssocResp\n");
2926                 }
2927
2928                 /*
2929                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2930                  * have to include the IEs in the (re)association response.
2931                  */
2932                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2933                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2934                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2935                         sdata_info(sdata,
2936                                    "AP bug: HT capability missing from AssocResp\n");
2937                 }
2938                 if (!elems.ht_operation && bss_elems.ht_operation &&
2939                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2940                         elems.ht_operation = bss_elems.ht_operation;
2941                         sdata_info(sdata,
2942                                    "AP bug: HT operation missing from AssocResp\n");
2943                 }
2944                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2945                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2946                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2947                         sdata_info(sdata,
2948                                    "AP bug: VHT capa missing from AssocResp\n");
2949                 }
2950                 if (!elems.vht_operation && bss_elems.vht_operation &&
2951                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2952                         elems.vht_operation = bss_elems.vht_operation;
2953                         sdata_info(sdata,
2954                                    "AP bug: VHT operation missing from AssocResp\n");
2955                 }
2956         }
2957
2958         /*
2959          * We previously checked these in the beacon/probe response, so
2960          * they should be present here. This is just a safety net.
2961          */
2962         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2963             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2964                 sdata_info(sdata,
2965                            "HT AP is missing WMM params or HT capability/operation\n");
2966                 ret = false;
2967                 goto out;
2968         }
2969
2970         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2971             (!elems.vht_cap_elem || !elems.vht_operation)) {
2972                 sdata_info(sdata,
2973                            "VHT AP is missing VHT capability/operation\n");
2974                 ret = false;
2975                 goto out;
2976         }
2977
2978         mutex_lock(&sdata->local->sta_mtx);
2979         /*
2980          * station info was already allocated and inserted before
2981          * the association and should be available to us
2982          */
2983         sta = sta_info_get(sdata, cbss->bssid);
2984         if (WARN_ON(!sta)) {
2985                 mutex_unlock(&sdata->local->sta_mtx);
2986                 ret = false;
2987                 goto out;
2988         }
2989
2990         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2991
2992         /* Set up internal HT/VHT capabilities */
2993         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2994                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2995                                                   elems.ht_cap_elem, sta);
2996
2997         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2998                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2999                                                     elems.vht_cap_elem, sta);
3000
3001         /*
3002          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3003          * in their association response, so ignore that data for our own
3004          * configuration. If it changed since the last beacon, we'll get the
3005          * next beacon and update then.
3006          */
3007
3008         /*
3009          * If an operating mode notification IE is present, override the
3010          * NSS calculation (that would be done in rate_control_rate_init())
3011          * and use the # of streams from that element.
3012          */
3013         if (elems.opmode_notif &&
3014             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3015                 u8 nss;
3016
3017                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3018                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3019                 nss += 1;
3020                 sta->sta.rx_nss = nss;
3021         }
3022
3023         rate_control_rate_init(sta);
3024
3025         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3026                 set_sta_flag(sta, WLAN_STA_MFP);
3027                 sta->sta.mfp = true;
3028         } else {
3029                 sta->sta.mfp = false;
3030         }
3031
3032         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3033
3034         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3035         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3036                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3037         if (err) {
3038                 sdata_info(sdata,
3039                            "failed to move station %pM to desired state\n",
3040                            sta->sta.addr);
3041                 WARN_ON(__sta_info_destroy(sta));
3042                 mutex_unlock(&sdata->local->sta_mtx);
3043                 ret = false;
3044                 goto out;
3045         }
3046
3047         mutex_unlock(&sdata->local->sta_mtx);
3048
3049         /*
3050          * Always handle WMM once after association regardless
3051          * of the first value the AP uses. Setting -1 here has
3052          * that effect because the AP values is an unsigned
3053          * 4-bit value.
3054          */
3055         ifmgd->wmm_last_param_set = -1;
3056
3057         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3058                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3059                                          elems.wmm_param_len);
3060         else
3061                 ieee80211_set_wmm_default(sdata, false);
3062         changed |= BSS_CHANGED_QOS;
3063
3064         /* set AID and assoc capability,
3065          * ieee80211_set_associated() will tell the driver */
3066         bss_conf->aid = aid;
3067         bss_conf->assoc_capability = capab_info;
3068         ieee80211_set_associated(sdata, cbss, changed);
3069
3070         /*
3071          * If we're using 4-addr mode, let the AP know that we're
3072          * doing so, so that it can create the STA VLAN on its side
3073          */
3074         if (ifmgd->use_4addr)
3075                 ieee80211_send_4addr_nullfunc(local, sdata);
3076
3077         /*
3078          * Start timer to probe the connection to the AP now.
3079          * Also start the timer that will detect beacon loss.
3080          */
3081         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3082         ieee80211_sta_reset_beacon_monitor(sdata);
3083
3084         ret = true;
3085  out:
3086         kfree(bss_ies);
3087         return ret;
3088 }
3089
3090 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3091                                          struct ieee80211_mgmt *mgmt,
3092                                          size_t len)
3093 {
3094         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3095         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3096         u16 capab_info, status_code, aid;
3097         struct ieee802_11_elems elems;
3098         int ac, uapsd_queues = -1;
3099         u8 *pos;
3100         bool reassoc;
3101         struct cfg80211_bss *bss;
3102         struct ieee80211_event event = {
3103                 .type = MLME_EVENT,
3104                 .u.mlme.data = ASSOC_EVENT,
3105         };
3106
3107         sdata_assert_lock(sdata);
3108
3109         if (!assoc_data)
3110                 return;
3111         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3112                 return;
3113
3114         /*
3115          * AssocResp and ReassocResp have identical structure, so process both
3116          * of them in this function.
3117          */
3118
3119         if (len < 24 + 6)
3120                 return;
3121
3122         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3123         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3124         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3125         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3126
3127         sdata_info(sdata,
3128                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3129                    reassoc ? "Rea" : "A", mgmt->sa,
3130                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3131
3132         pos = mgmt->u.assoc_resp.variable;
3133         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3134
3135         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3136             elems.timeout_int &&
3137             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3138                 u32 tu, ms;
3139                 tu = le32_to_cpu(elems.timeout_int->value);
3140                 ms = tu * 1024 / 1000;
3141                 sdata_info(sdata,
3142                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3143                            mgmt->sa, tu, ms);
3144                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3145                 assoc_data->timeout_started = true;
3146                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3147                         run_again(sdata, assoc_data->timeout);
3148                 return;
3149         }
3150
3151         bss = assoc_data->bss;
3152
3153         if (status_code != WLAN_STATUS_SUCCESS) {
3154                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3155                            mgmt->sa, status_code);
3156                 ieee80211_destroy_assoc_data(sdata, false);
3157                 event.u.mlme.status = MLME_DENIED;
3158                 event.u.mlme.reason = status_code;
3159                 drv_event_callback(sdata->local, sdata, &event);
3160         } else {
3161                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3162                         /* oops -- internal error -- send timeout for now */
3163                         ieee80211_destroy_assoc_data(sdata, false);
3164                         cfg80211_assoc_timeout(sdata->dev, bss);
3165                         return;
3166                 }
3167                 event.u.mlme.status = MLME_SUCCESS;
3168                 drv_event_callback(sdata->local, sdata, &event);
3169                 sdata_info(sdata, "associated\n");
3170
3171                 /*
3172                  * destroy assoc_data afterwards, as otherwise an idle
3173                  * recalc after assoc_data is NULL but before associated
3174                  * is set can cause the interface to go idle
3175                  */
3176                 ieee80211_destroy_assoc_data(sdata, true);
3177
3178                 /* get uapsd queues configuration */
3179                 uapsd_queues = 0;
3180                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3181                         if (sdata->tx_conf[ac].uapsd)
3182                                 uapsd_queues |= BIT(ac);
3183         }
3184
3185         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3186 }
3187
3188 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3189                                   struct ieee80211_mgmt *mgmt, size_t len,
3190                                   struct ieee80211_rx_status *rx_status,
3191                                   struct ieee802_11_elems *elems)
3192 {
3193         struct ieee80211_local *local = sdata->local;
3194         struct ieee80211_bss *bss;
3195         struct ieee80211_channel *channel;
3196
3197         sdata_assert_lock(sdata);
3198
3199         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3200         if (!channel)
3201                 return;
3202
3203         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3204                                         channel);
3205         if (bss) {
3206                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3207                 ieee80211_rx_bss_put(local, bss);
3208         }
3209 }
3210
3211
3212 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3213                                          struct sk_buff *skb)
3214 {
3215         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3216         struct ieee80211_if_managed *ifmgd;
3217         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3218         size_t baselen, len = skb->len;
3219         struct ieee802_11_elems elems;
3220
3221         ifmgd = &sdata->u.mgd;
3222
3223         sdata_assert_lock(sdata);
3224
3225         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3226                 return; /* ignore ProbeResp to foreign address */
3227
3228         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3229         if (baselen > len)
3230                 return;
3231
3232         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3233                                false, &elems);
3234
3235         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3236
3237         if (ifmgd->associated &&
3238             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3239                 ieee80211_reset_ap_probe(sdata);
3240
3241         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3242             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3243                 /* got probe response, continue with auth */
3244                 sdata_info(sdata, "direct probe responded\n");
3245                 ifmgd->auth_data->tries = 0;
3246                 ifmgd->auth_data->timeout = jiffies;
3247                 ifmgd->auth_data->timeout_started = true;
3248                 run_again(sdata, ifmgd->auth_data->timeout);
3249         }
3250 }
3251
3252 /*
3253  * This is the canonical list of information elements we care about,
3254  * the filter code also gives us all changes to the Microsoft OUI
3255  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3256  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3257  * changes to requested client power.
3258  *
3259  * We implement beacon filtering in software since that means we can
3260  * avoid processing the frame here and in cfg80211, and userspace
3261  * will not be able to tell whether the hardware supports it or not.
3262  *
3263  * XXX: This list needs to be dynamic -- userspace needs to be able to
3264  *      add items it requires. It also needs to be able to tell us to
3265  *      look out for other vendor IEs.
3266  */
3267 static const u64 care_about_ies =
3268         (1ULL << WLAN_EID_COUNTRY) |
3269         (1ULL << WLAN_EID_ERP_INFO) |
3270         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3271         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3272         (1ULL << WLAN_EID_HT_CAPABILITY) |
3273         (1ULL << WLAN_EID_HT_OPERATION) |
3274         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3275
3276 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3277                                      struct ieee80211_mgmt *mgmt, size_t len,
3278                                      struct ieee80211_rx_status *rx_status)
3279 {
3280         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3281         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3282         size_t baselen;
3283         struct ieee802_11_elems elems;
3284         struct ieee80211_local *local = sdata->local;
3285         struct ieee80211_chanctx_conf *chanctx_conf;
3286         struct ieee80211_channel *chan;
3287         struct sta_info *sta;
3288         u32 changed = 0;
3289         bool erp_valid;
3290         u8 erp_value = 0;
3291         u32 ncrc;
3292         u8 *bssid;
3293         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3294
3295         sdata_assert_lock(sdata);
3296
3297         /* Process beacon from the current BSS */
3298         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3299         if (baselen > len)
3300                 return;
3301
3302         rcu_read_lock();
3303         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3304         if (!chanctx_conf) {
3305                 rcu_read_unlock();
3306                 return;
3307         }
3308
3309         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3310                 rcu_read_unlock();
3311                 return;
3312         }
3313         chan = chanctx_conf->def.chan;
3314         rcu_read_unlock();
3315
3316         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3317             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3318                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3319                                        len - baselen, false, &elems);
3320
3321                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3322                 if (elems.tim && !elems.parse_error) {
3323                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3324                         ifmgd->dtim_period = tim_ie->dtim_period;
3325                 }
3326                 ifmgd->have_beacon = true;
3327                 ifmgd->assoc_data->need_beacon = false;
3328                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3329                         sdata->vif.bss_conf.sync_tsf =
3330                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3331                         sdata->vif.bss_conf.sync_device_ts =
3332                                 rx_status->device_timestamp;
3333                         if (elems.tim)
3334                                 sdata->vif.bss_conf.sync_dtim_count =
3335                                         elems.tim->dtim_count;
3336                         else
3337                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3338                 }
3339                 /* continue assoc process */
3340                 ifmgd->assoc_data->timeout = jiffies;
3341                 ifmgd->assoc_data->timeout_started = true;
3342                 run_again(sdata, ifmgd->assoc_data->timeout);
3343                 return;
3344         }
3345
3346         if (!ifmgd->associated ||
3347             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3348                 return;
3349         bssid = ifmgd->associated->bssid;
3350
3351         /* Track average RSSI from the Beacon frames of the current AP */
3352         ifmgd->last_beacon_signal = rx_status->signal;
3353         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3354                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3355                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3356                 ifmgd->last_cqm_event_signal = 0;
3357                 ifmgd->count_beacon_signal = 1;
3358                 ifmgd->last_ave_beacon_signal = 0;
3359         } else {
3360                 ifmgd->ave_beacon_signal =
3361                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3362                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3363                          ifmgd->ave_beacon_signal) / 16;
3364                 ifmgd->count_beacon_signal++;
3365         }
3366
3367         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3368             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3369                 int sig = ifmgd->ave_beacon_signal;
3370                 int last_sig = ifmgd->last_ave_beacon_signal;
3371                 struct ieee80211_event event = {
3372                         .type = RSSI_EVENT,
3373                 };
3374
3375                 /*
3376                  * if signal crosses either of the boundaries, invoke callback
3377                  * with appropriate parameters
3378                  */
3379                 if (sig > ifmgd->rssi_max_thold &&
3380                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3381                         ifmgd->last_ave_beacon_signal = sig;
3382                         event.u.rssi.data = RSSI_EVENT_HIGH;
3383                         drv_event_callback(local, sdata, &event);
3384                 } else if (sig < ifmgd->rssi_min_thold &&
3385                            (last_sig >= ifmgd->rssi_max_thold ||
3386                            last_sig == 0)) {
3387                         ifmgd->last_ave_beacon_signal = sig;
3388                         event.u.rssi.data = RSSI_EVENT_LOW;
3389                         drv_event_callback(local, sdata, &event);
3390                 }
3391         }
3392
3393         if (bss_conf->cqm_rssi_thold &&
3394             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3395             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3396                 int sig = ifmgd->ave_beacon_signal / 16;
3397                 int last_event = ifmgd->last_cqm_event_signal;
3398                 int thold = bss_conf->cqm_rssi_thold;
3399                 int hyst = bss_conf->cqm_rssi_hyst;
3400                 if (sig < thold &&
3401                     (last_event == 0 || sig < last_event - hyst)) {
3402                         ifmgd->last_cqm_event_signal = sig;
3403                         ieee80211_cqm_rssi_notify(
3404                                 &sdata->vif,
3405                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3406                                 GFP_KERNEL);
3407                 } else if (sig > thold &&
3408                            (last_event == 0 || sig > last_event + hyst)) {
3409                         ifmgd->last_cqm_event_signal = sig;
3410                         ieee80211_cqm_rssi_notify(
3411                                 &sdata->vif,
3412                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3413                                 GFP_KERNEL);
3414                 }
3415         }
3416
3417         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3418                 mlme_dbg_ratelimited(sdata,
3419                                      "cancelling AP probe due to a received beacon\n");
3420                 ieee80211_reset_ap_probe(sdata);
3421         }
3422
3423         /*
3424          * Push the beacon loss detection into the future since
3425          * we are processing a beacon from the AP just now.
3426          */
3427         ieee80211_sta_reset_beacon_monitor(sdata);
3428
3429         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3430         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3431                                           len - baselen, false, &elems,
3432                                           care_about_ies, ncrc);
3433
3434         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3435                 bool directed_tim = ieee80211_check_tim(elems.tim,
3436                                                         elems.tim_len,
3437                                                         ifmgd->aid);
3438                 if (directed_tim) {
3439                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3440                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3441                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3442                                         ieee80211_hw_config(local,
3443                                                             IEEE80211_CONF_CHANGE_PS);
3444                                 }
3445                                 ieee80211_send_nullfunc(local, sdata, 0);
3446                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3447                                 local->pspolling = true;
3448
3449                                 /*
3450                                  * Here is assumed that the driver will be
3451                                  * able to send ps-poll frame and receive a
3452                                  * response even though power save mode is
3453                                  * enabled, but some drivers might require
3454                                  * to disable power save here. This needs
3455                                  * to be investigated.
3456                                  */
3457                                 ieee80211_send_pspoll(local, sdata);
3458                         }
3459                 }
3460         }
3461
3462         if (sdata->vif.p2p) {
3463                 struct ieee80211_p2p_noa_attr noa = {};
3464                 int ret;
3465
3466                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3467                                             len - baselen,
3468                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3469                                             (u8 *) &noa, sizeof(noa));
3470                 if (ret >= 2) {
3471                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3472                                 /* valid noa_attr and index changed */
3473                                 sdata->u.mgd.p2p_noa_index = noa.index;
3474                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3475                                 changed |= BSS_CHANGED_P2P_PS;
3476                                 /*
3477                                  * make sure we update all information, the CRC
3478                                  * mechanism doesn't look at P2P attributes.
3479                                  */
3480                                 ifmgd->beacon_crc_valid = false;
3481                         }
3482                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3483                         /* noa_attr not found and we had valid noa_attr before */
3484                         sdata->u.mgd.p2p_noa_index = -1;
3485                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3486                         changed |= BSS_CHANGED_P2P_PS;
3487                         ifmgd->beacon_crc_valid = false;
3488                 }
3489         }
3490
3491         if (ifmgd->csa_waiting_bcn)
3492                 ieee80211_chswitch_post_beacon(sdata);
3493
3494         /*
3495          * Update beacon timing and dtim count on every beacon appearance. This
3496          * will allow the driver to use the most updated values. Do it before
3497          * comparing this one with last received beacon.
3498          * IMPORTANT: These parameters would possibly be out of sync by the time
3499          * the driver will use them. The synchronized view is currently
3500          * guaranteed only in certain callbacks.
3501          */
3502         if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3503                 sdata->vif.bss_conf.sync_tsf =
3504                         le64_to_cpu(mgmt->u.beacon.timestamp);
3505                 sdata->vif.bss_conf.sync_device_ts =
3506                         rx_status->device_timestamp;
3507                 if (elems.tim)
3508                         sdata->vif.bss_conf.sync_dtim_count =
3509                                 elems.tim->dtim_count;
3510                 else
3511                         sdata->vif.bss_conf.sync_dtim_count = 0;
3512         }
3513
3514         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3515                 return;
3516         ifmgd->beacon_crc = ncrc;
3517         ifmgd->beacon_crc_valid = true;
3518
3519         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3520
3521         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3522                                          rx_status->device_timestamp,
3523                                          &elems, true);
3524
3525         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3526             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3527                                      elems.wmm_param_len))
3528                 changed |= BSS_CHANGED_QOS;
3529
3530         /*
3531          * If we haven't had a beacon before, tell the driver about the
3532          * DTIM period (and beacon timing if desired) now.
3533          */
3534         if (!ifmgd->have_beacon) {
3535                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3536                 if (elems.tim)
3537                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3538                 else
3539                         bss_conf->dtim_period = 1;
3540
3541                 changed |= BSS_CHANGED_BEACON_INFO;
3542                 ifmgd->have_beacon = true;
3543
3544                 mutex_lock(&local->iflist_mtx);
3545                 ieee80211_recalc_ps(local, -1);
3546                 mutex_unlock(&local->iflist_mtx);
3547
3548                 ieee80211_recalc_ps_vif(sdata);
3549         }
3550
3551         if (elems.erp_info) {
3552                 erp_valid = true;
3553                 erp_value = elems.erp_info[0];
3554         } else {
3555                 erp_valid = false;
3556         }
3557         changed |= ieee80211_handle_bss_capability(sdata,
3558                         le16_to_cpu(mgmt->u.beacon.capab_info),
3559                         erp_valid, erp_value);
3560
3561         mutex_lock(&local->sta_mtx);
3562         sta = sta_info_get(sdata, bssid);
3563
3564         if (ieee80211_config_bw(sdata, sta,
3565                                 elems.ht_cap_elem, elems.ht_operation,
3566                                 elems.vht_operation, bssid, &changed)) {
3567                 mutex_unlock(&local->sta_mtx);
3568                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3569                                        WLAN_REASON_DEAUTH_LEAVING,
3570                                        true, deauth_buf);
3571                 ieee80211_report_disconnect(sdata, deauth_buf,
3572                                             sizeof(deauth_buf), true,
3573                                             WLAN_REASON_DEAUTH_LEAVING);
3574                 return;
3575         }
3576
3577         if (sta && elems.opmode_notif)
3578                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3579                                             rx_status->band, true);
3580         mutex_unlock(&local->sta_mtx);
3581
3582         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3583                                                elems.country_elem,
3584                                                elems.country_elem_len,
3585                                                elems.pwr_constr_elem,
3586                                                elems.cisco_dtpc_elem);
3587
3588         ieee80211_bss_info_change_notify(sdata, changed);
3589 }
3590
3591 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3592                                   struct sk_buff *skb)
3593 {
3594         struct ieee80211_rx_status *rx_status;
3595         struct ieee80211_mgmt *mgmt;
3596         u16 fc;
3597         struct ieee802_11_elems elems;
3598         int ies_len;
3599
3600         rx_status = (struct ieee80211_rx_status *) skb->cb;
3601         mgmt = (struct ieee80211_mgmt *) skb->data;
3602         fc = le16_to_cpu(mgmt->frame_control);
3603
3604         sdata_lock(sdata);
3605
3606         switch (fc & IEEE80211_FCTL_STYPE) {
3607         case IEEE80211_STYPE_BEACON:
3608                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3609                 break;
3610         case IEEE80211_STYPE_PROBE_RESP:
3611                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3612                 break;
3613         case IEEE80211_STYPE_AUTH:
3614                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3615                 break;
3616         case IEEE80211_STYPE_DEAUTH:
3617                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3618                 break;
3619         case IEEE80211_STYPE_DISASSOC:
3620                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3621                 break;
3622         case IEEE80211_STYPE_ASSOC_RESP:
3623         case IEEE80211_STYPE_REASSOC_RESP:
3624                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3625                 break;
3626         case IEEE80211_STYPE_ACTION:
3627                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3628                         ies_len = skb->len -
3629                                   offsetof(struct ieee80211_mgmt,
3630                                            u.action.u.chan_switch.variable);
3631
3632                         if (ies_len < 0)
3633                                 break;
3634
3635                         ieee802_11_parse_elems(
3636                                 mgmt->u.action.u.chan_switch.variable,
3637                                 ies_len, true, &elems);
3638
3639                         if (elems.parse_error)
3640                                 break;
3641
3642                         ieee80211_sta_process_chanswitch(sdata,
3643                                                  rx_status->mactime,
3644                                                  rx_status->device_timestamp,
3645                                                  &elems, false);
3646                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3647                         ies_len = skb->len -
3648                                   offsetof(struct ieee80211_mgmt,
3649                                            u.action.u.ext_chan_switch.variable);
3650
3651                         if (ies_len < 0)
3652                                 break;
3653
3654                         ieee802_11_parse_elems(
3655                                 mgmt->u.action.u.ext_chan_switch.variable,
3656                                 ies_len, true, &elems);
3657
3658                         if (elems.parse_error)
3659                                 break;
3660
3661                         /* for the handling code pretend this was also an IE */
3662                         elems.ext_chansw_ie =
3663                                 &mgmt->u.action.u.ext_chan_switch.data;
3664
3665                         ieee80211_sta_process_chanswitch(sdata,
3666                                                  rx_status->mactime,
3667                                                  rx_status->device_timestamp,
3668                                                  &elems, false);
3669                 }
3670                 break;
3671         }
3672         sdata_unlock(sdata);
3673 }
3674
3675 static void ieee80211_sta_timer(unsigned long data)
3676 {
3677         struct ieee80211_sub_if_data *sdata =
3678                 (struct ieee80211_sub_if_data *) data;
3679
3680         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3681 }
3682
3683 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3684                                           u8 *bssid, u8 reason, bool tx)
3685 {
3686         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3687
3688         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3689                                tx, frame_buf);
3690
3691         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3692                                     reason);
3693 }
3694
3695 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3696 {
3697         struct ieee80211_local *local = sdata->local;
3698         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3699         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3700         u32 tx_flags = 0;
3701
3702         sdata_assert_lock(sdata);
3703
3704         if (WARN_ON_ONCE(!auth_data))
3705                 return -EINVAL;
3706
3707         auth_data->tries++;
3708
3709         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3710                 sdata_info(sdata, "authentication with %pM timed out\n",
3711                            auth_data->bss->bssid);
3712
3713                 /*
3714                  * Most likely AP is not in the range so remove the
3715                  * bss struct for that AP.
3716                  */
3717                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3718
3719                 return -ETIMEDOUT;
3720         }
3721
3722         drv_mgd_prepare_tx(local, sdata);
3723
3724         if (auth_data->bss->proberesp_ies) {
3725                 u16 trans = 1;
3726                 u16 status = 0;
3727
3728                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3729                            auth_data->bss->bssid, auth_data->tries,
3730                            IEEE80211_AUTH_MAX_TRIES);
3731
3732                 auth_data->expected_transaction = 2;
3733
3734                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3735                         trans = auth_data->sae_trans;
3736                         status = auth_data->sae_status;
3737                         auth_data->expected_transaction = trans;
3738                 }
3739
3740                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3741                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3742                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3743
3744                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3745                                     auth_data->data, auth_data->data_len,
3746                                     auth_data->bss->bssid,
3747                                     auth_data->bss->bssid, NULL, 0, 0,
3748                                     tx_flags);
3749         } else {
3750                 const u8 *ssidie;
3751
3752                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3753                            auth_data->bss->bssid, auth_data->tries,
3754                            IEEE80211_AUTH_MAX_TRIES);
3755
3756                 rcu_read_lock();
3757                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3758                 if (!ssidie) {
3759                         rcu_read_unlock();
3760                         return -EINVAL;
3761                 }
3762                 /*
3763                  * Direct probe is sent to broadcast address as some APs
3764                  * will not answer to direct packet in unassociated state.
3765                  */
3766                 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3767                                          ssidie + 2, ssidie[1],
3768                                          NULL, 0, (u32) -1, true, 0,
3769                                          auth_data->bss->channel, false);
3770                 rcu_read_unlock();
3771         }
3772
3773         if (tx_flags == 0) {
3774                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3775                 auth_data->timeout_started = true;
3776                 run_again(sdata, auth_data->timeout);
3777         } else {
3778                 auth_data->timeout =
3779                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3780                 auth_data->timeout_started = true;
3781                 run_again(sdata, auth_data->timeout);
3782         }
3783
3784         return 0;
3785 }
3786
3787 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3788 {
3789         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3790         struct ieee80211_local *local = sdata->local;
3791
3792         sdata_assert_lock(sdata);
3793
3794         assoc_data->tries++;
3795         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3796                 sdata_info(sdata, "association with %pM timed out\n",
3797                            assoc_data->bss->bssid);
3798
3799                 /*
3800                  * Most likely AP is not in the range so remove the
3801                  * bss struct for that AP.
3802                  */
3803                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3804
3805                 return -ETIMEDOUT;
3806         }
3807
3808         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3809                    assoc_data->bss->bssid, assoc_data->tries,
3810                    IEEE80211_ASSOC_MAX_TRIES);
3811         ieee80211_send_assoc(sdata);
3812
3813         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3814                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3815                 assoc_data->timeout_started = true;
3816                 run_again(sdata, assoc_data->timeout);
3817         } else {
3818                 assoc_data->timeout =
3819                         round_jiffies_up(jiffies +
3820                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3821                 assoc_data->timeout_started = true;
3822                 run_again(sdata, assoc_data->timeout);
3823         }
3824
3825         return 0;
3826 }
3827
3828 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3829                                   __le16 fc, bool acked)
3830 {
3831         struct ieee80211_local *local = sdata->local;
3832
3833         sdata->u.mgd.status_fc = fc;
3834         sdata->u.mgd.status_acked = acked;
3835         sdata->u.mgd.status_received = true;
3836
3837         ieee80211_queue_work(&local->hw, &sdata->work);
3838 }
3839
3840 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3841 {
3842         struct ieee80211_local *local = sdata->local;
3843         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3844
3845         sdata_lock(sdata);
3846
3847         if (ifmgd->status_received) {
3848                 __le16 fc = ifmgd->status_fc;
3849                 bool status_acked = ifmgd->status_acked;
3850
3851                 ifmgd->status_received = false;
3852                 if (ifmgd->auth_data &&
3853                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3854                         if (status_acked) {
3855                                 ifmgd->auth_data->timeout =
3856                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3857                                 run_again(sdata, ifmgd->auth_data->timeout);
3858                         } else {
3859                                 ifmgd->auth_data->timeout = jiffies - 1;
3860                         }
3861                         ifmgd->auth_data->timeout_started = true;
3862                 } else if (ifmgd->assoc_data &&
3863                            (ieee80211_is_assoc_req(fc) ||
3864                             ieee80211_is_reassoc_req(fc))) {
3865                         if (status_acked) {
3866                                 ifmgd->assoc_data->timeout =
3867                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3868                                 run_again(sdata, ifmgd->assoc_data->timeout);
3869                         } else {
3870                                 ifmgd->assoc_data->timeout = jiffies - 1;
3871                         }
3872                         ifmgd->assoc_data->timeout_started = true;
3873                 }
3874         }
3875
3876         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3877             time_after(jiffies, ifmgd->auth_data->timeout)) {
3878                 if (ifmgd->auth_data->done) {
3879                         /*
3880                          * ok ... we waited for assoc but userspace didn't,
3881                          * so let's just kill the auth data
3882                          */
3883                         ieee80211_destroy_auth_data(sdata, false);
3884                 } else if (ieee80211_probe_auth(sdata)) {
3885                         u8 bssid[ETH_ALEN];
3886                         struct ieee80211_event event = {
3887                                 .type = MLME_EVENT,
3888                                 .u.mlme.data = AUTH_EVENT,
3889                                 .u.mlme.status = MLME_TIMEOUT,
3890                         };
3891
3892                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3893
3894                         ieee80211_destroy_auth_data(sdata, false);
3895
3896                         cfg80211_auth_timeout(sdata->dev, bssid);
3897                         drv_event_callback(sdata->local, sdata, &event);
3898                 }
3899         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3900                 run_again(sdata, ifmgd->auth_data->timeout);
3901
3902         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3903             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3904                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3905                     ieee80211_do_assoc(sdata)) {
3906                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3907                         struct ieee80211_event event = {
3908                                 .type = MLME_EVENT,
3909                                 .u.mlme.data = ASSOC_EVENT,
3910                                 .u.mlme.status = MLME_TIMEOUT,
3911                         };
3912
3913                         ieee80211_destroy_assoc_data(sdata, false);
3914                         cfg80211_assoc_timeout(sdata->dev, bss);
3915                         drv_event_callback(sdata->local, sdata, &event);
3916                 }
3917         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3918                 run_again(sdata, ifmgd->assoc_data->timeout);
3919
3920         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3921             ifmgd->associated) {
3922                 u8 bssid[ETH_ALEN];
3923                 int max_tries;
3924
3925                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3926
3927                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3928                         max_tries = max_nullfunc_tries;
3929                 else
3930                         max_tries = max_probe_tries;
3931
3932                 /* ACK received for nullfunc probing frame */
3933                 if (!ifmgd->probe_send_count)
3934                         ieee80211_reset_ap_probe(sdata);
3935                 else if (ifmgd->nullfunc_failed) {
3936                         if (ifmgd->probe_send_count < max_tries) {
3937                                 mlme_dbg(sdata,
3938                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3939                                          bssid, ifmgd->probe_send_count,
3940                                          max_tries);
3941                                 ieee80211_mgd_probe_ap_send(sdata);
3942                         } else {
3943                                 mlme_dbg(sdata,
3944                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3945                                          bssid);
3946                                 ieee80211_sta_connection_lost(sdata, bssid,
3947                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3948                                         false);
3949                         }
3950                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3951                         run_again(sdata, ifmgd->probe_timeout);
3952                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3953                         mlme_dbg(sdata,
3954                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3955                                  bssid, probe_wait_ms);
3956                         ieee80211_sta_connection_lost(sdata, bssid,
3957                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3958                 } else if (ifmgd->probe_send_count < max_tries) {
3959                         mlme_dbg(sdata,
3960                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3961                                  bssid, probe_wait_ms,
3962                                  ifmgd->probe_send_count, max_tries);
3963                         ieee80211_mgd_probe_ap_send(sdata);
3964                 } else {
3965                         /*
3966                          * We actually lost the connection ... or did we?
3967                          * Let's make sure!
3968                          */
3969                         wiphy_debug(local->hw.wiphy,
3970                                     "%s: No probe response from AP %pM"
3971                                     " after %dms, disconnecting.\n",
3972                                     sdata->name,
3973                                     bssid, probe_wait_ms);
3974
3975                         ieee80211_sta_connection_lost(sdata, bssid,
3976                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3977                 }
3978         }
3979
3980         sdata_unlock(sdata);
3981 }
3982
3983 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3984 {
3985         struct ieee80211_sub_if_data *sdata =
3986                 (struct ieee80211_sub_if_data *) data;
3987         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3988
3989         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3990                 return;
3991
3992         sdata->u.mgd.connection_loss = false;
3993         ieee80211_queue_work(&sdata->local->hw,
3994                              &sdata->u.mgd.beacon_connection_loss_work);
3995 }
3996
3997 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3998 {
3999         struct ieee80211_sub_if_data *sdata =
4000                 (struct ieee80211_sub_if_data *) data;
4001         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4002         struct ieee80211_local *local = sdata->local;
4003
4004         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4005                 return;
4006
4007         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4008 }
4009
4010 static void ieee80211_sta_monitor_work(struct work_struct *work)
4011 {
4012         struct ieee80211_sub_if_data *sdata =
4013                 container_of(work, struct ieee80211_sub_if_data,
4014                              u.mgd.monitor_work);
4015
4016         ieee80211_mgd_probe_ap(sdata, false);
4017 }
4018
4019 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4020 {
4021         u32 flags;
4022
4023         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4024                 __ieee80211_stop_poll(sdata);
4025
4026                 /* let's probe the connection once */
4027                 flags = sdata->local->hw.flags;
4028                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
4029                         ieee80211_queue_work(&sdata->local->hw,
4030                                              &sdata->u.mgd.monitor_work);
4031                 /* and do all the other regular work too */
4032                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4033         }
4034 }
4035
4036 #ifdef CONFIG_PM
4037 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4038 {
4039         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4040         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4041
4042         sdata_lock(sdata);
4043
4044         if (ifmgd->auth_data || ifmgd->assoc_data) {
4045                 const u8 *bssid = ifmgd->auth_data ?
4046                                 ifmgd->auth_data->bss->bssid :
4047                                 ifmgd->assoc_data->bss->bssid;
4048
4049                 /*
4050                  * If we are trying to authenticate / associate while suspending,
4051                  * cfg80211 won't know and won't actually abort those attempts,
4052                  * thus we need to do that ourselves.
4053                  */
4054                 ieee80211_send_deauth_disassoc(sdata, bssid,
4055                                                IEEE80211_STYPE_DEAUTH,
4056                                                WLAN_REASON_DEAUTH_LEAVING,
4057                                                false, frame_buf);
4058                 if (ifmgd->assoc_data)
4059                         ieee80211_destroy_assoc_data(sdata, false);
4060                 if (ifmgd->auth_data)
4061                         ieee80211_destroy_auth_data(sdata, false);
4062                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4063                                       IEEE80211_DEAUTH_FRAME_LEN);
4064         }
4065
4066         /* This is a bit of a hack - we should find a better and more generic
4067          * solution to this. Normally when suspending, cfg80211 will in fact
4068          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4069          * auth (not so important) or assoc (this is the problem) process.
4070          *
4071          * As a consequence, it can happen that we are in the process of both
4072          * associating and suspending, and receive an association response
4073          * after cfg80211 has checked if it needs to disconnect, but before
4074          * we actually set the flag to drop incoming frames. This will then
4075          * cause the workqueue flush to process the association response in
4076          * the suspend, resulting in a successful association just before it
4077          * tries to remove the interface from the driver, which now though
4078          * has a channel context assigned ... this results in issues.
4079          *
4080          * To work around this (for now) simply deauth here again if we're
4081          * now connected.
4082          */
4083         if (ifmgd->associated && !sdata->local->wowlan) {
4084                 u8 bssid[ETH_ALEN];
4085                 struct cfg80211_deauth_request req = {
4086                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4087                         .bssid = bssid,
4088                 };
4089
4090                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4091                 ieee80211_mgd_deauth(sdata, &req);
4092         }
4093
4094         sdata_unlock(sdata);
4095 }
4096
4097 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4098 {
4099         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4100
4101         sdata_lock(sdata);
4102         if (!ifmgd->associated) {
4103                 sdata_unlock(sdata);
4104                 return;
4105         }
4106
4107         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4108                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4109                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4110                 ieee80211_sta_connection_lost(sdata,
4111                                               ifmgd->associated->bssid,
4112                                               WLAN_REASON_UNSPECIFIED,
4113                                               true);
4114                 sdata_unlock(sdata);
4115                 return;
4116         }
4117         sdata_unlock(sdata);
4118 }
4119 #endif
4120
4121 /* interface setup */
4122 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4123 {
4124         struct ieee80211_if_managed *ifmgd;
4125
4126         ifmgd = &sdata->u.mgd;
4127         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4128         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4129         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4130                   ieee80211_beacon_connection_loss_work);
4131         INIT_WORK(&ifmgd->csa_connection_drop_work,
4132                   ieee80211_csa_connection_drop_work);
4133         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4134         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4135                           ieee80211_tdls_peer_del_work);
4136         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4137                     (unsigned long) sdata);
4138         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4139                     (unsigned long) sdata);
4140         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4141                     (unsigned long) sdata);
4142         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4143                     (unsigned long) sdata);
4144         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4145                           ieee80211_sta_handle_tspec_ac_params_wk);
4146
4147         ifmgd->flags = 0;
4148         ifmgd->powersave = sdata->wdev.ps;
4149         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4150         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4151         ifmgd->p2p_noa_index = -1;
4152
4153         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4154                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4155         else
4156                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4157
4158         /* Setup TDLS data */
4159         spin_lock_init(&ifmgd->teardown_lock);
4160         ifmgd->teardown_skb = NULL;
4161         ifmgd->orig_teardown_skb = NULL;
4162 }
4163
4164 /* scan finished notification */
4165 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4166 {
4167         struct ieee80211_sub_if_data *sdata;
4168
4169         /* Restart STA timers */
4170         rcu_read_lock();
4171         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4172                 if (ieee80211_sdata_running(sdata))
4173                         ieee80211_restart_sta_timer(sdata);
4174         }
4175         rcu_read_unlock();
4176 }
4177
4178 int ieee80211_max_network_latency(struct notifier_block *nb,
4179                                   unsigned long data, void *dummy)
4180 {
4181         s32 latency_usec = (s32) data;
4182         struct ieee80211_local *local =
4183                 container_of(nb, struct ieee80211_local,
4184                              network_latency_notifier);
4185
4186         mutex_lock(&local->iflist_mtx);
4187         ieee80211_recalc_ps(local, latency_usec);
4188         mutex_unlock(&local->iflist_mtx);
4189
4190         return NOTIFY_OK;
4191 }
4192
4193 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4194                                      struct cfg80211_bss *cbss)
4195 {
4196         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4197         const u8 *ht_cap_ie, *vht_cap_ie;
4198         const struct ieee80211_ht_cap *ht_cap;
4199         const struct ieee80211_vht_cap *vht_cap;
4200         u8 chains = 1;
4201
4202         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4203                 return chains;
4204
4205         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4206         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4207                 ht_cap = (void *)(ht_cap_ie + 2);
4208                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4209                 /*
4210                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4211                  *       "Tx Unequal Modulation Supported" fields.
4212                  */
4213         }
4214
4215         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4216                 return chains;
4217
4218         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4219         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4220                 u8 nss;
4221                 u16 tx_mcs_map;
4222
4223                 vht_cap = (void *)(vht_cap_ie + 2);
4224                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4225                 for (nss = 8; nss > 0; nss--) {
4226                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4227                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4228                                 break;
4229                 }
4230                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4231                 chains = max(chains, nss);
4232         }
4233
4234         return chains;
4235 }
4236
4237 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4238                                   struct cfg80211_bss *cbss)
4239 {
4240         struct ieee80211_local *local = sdata->local;
4241         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4242         const struct ieee80211_ht_cap *ht_cap = NULL;
4243         const struct ieee80211_ht_operation *ht_oper = NULL;
4244         const struct ieee80211_vht_operation *vht_oper = NULL;
4245         struct ieee80211_supported_band *sband;
4246         struct cfg80211_chan_def chandef;
4247         int ret;
4248
4249         sband = local->hw.wiphy->bands[cbss->channel->band];
4250
4251         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4252                           IEEE80211_STA_DISABLE_80P80MHZ |
4253                           IEEE80211_STA_DISABLE_160MHZ);
4254
4255         rcu_read_lock();
4256
4257         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4258             sband->ht_cap.ht_supported) {
4259                 const u8 *ht_oper_ie, *ht_cap_ie;
4260
4261                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4262                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4263                         ht_oper = (void *)(ht_oper_ie + 2);
4264
4265                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4266                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4267                         ht_cap = (void *)(ht_cap_ie + 2);
4268
4269                 if (!ht_cap) {
4270                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4271                         ht_oper = NULL;
4272                 }
4273         }
4274
4275         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4276             sband->vht_cap.vht_supported) {
4277                 const u8 *vht_oper_ie, *vht_cap;
4278
4279                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4280                                                    WLAN_EID_VHT_OPERATION);
4281                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4282                         vht_oper = (void *)(vht_oper_ie + 2);
4283                 if (vht_oper && !ht_oper) {
4284                         vht_oper = NULL;
4285                         sdata_info(sdata,
4286                                    "AP advertised VHT without HT, disabling both\n");
4287                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4288                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4289                 }
4290
4291                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4292                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4293                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4294                         vht_oper = NULL;
4295                 }
4296         }
4297
4298         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4299                                                      cbss->channel,
4300                                                      ht_cap, ht_oper, vht_oper,
4301                                                      &chandef, false);
4302
4303         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4304                                       local->rx_chains);
4305
4306         rcu_read_unlock();
4307
4308         /* will change later if needed */
4309         sdata->smps_mode = IEEE80211_SMPS_OFF;
4310
4311         mutex_lock(&local->mtx);
4312         /*
4313          * If this fails (possibly due to channel context sharing
4314          * on incompatible channels, e.g. 80+80 and 160 sharing the
4315          * same control channel) try to use a smaller bandwidth.
4316          */
4317         ret = ieee80211_vif_use_channel(sdata, &chandef,
4318                                         IEEE80211_CHANCTX_SHARED);
4319
4320         /* don't downgrade for 5 and 10 MHz channels, though. */
4321         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4322             chandef.width == NL80211_CHAN_WIDTH_10)
4323                 goto out;
4324
4325         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4326                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4327                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4328                                                 IEEE80211_CHANCTX_SHARED);
4329         }
4330  out:
4331         mutex_unlock(&local->mtx);
4332         return ret;
4333 }
4334
4335 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4336                                      struct cfg80211_bss *cbss, bool assoc,
4337                                      bool override)
4338 {
4339         struct ieee80211_local *local = sdata->local;
4340         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4341         struct ieee80211_bss *bss = (void *)cbss->priv;
4342         struct sta_info *new_sta = NULL;
4343         struct ieee80211_supported_band *sband;
4344         bool have_sta = false;
4345         int err;
4346
4347         sband = local->hw.wiphy->bands[cbss->channel->band];
4348
4349         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4350                 return -EINVAL;
4351
4352         if (assoc) {
4353                 rcu_read_lock();
4354                 have_sta = sta_info_get(sdata, cbss->bssid);
4355                 rcu_read_unlock();
4356         }
4357
4358         if (!have_sta) {
4359                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4360                 if (!new_sta)
4361                         return -ENOMEM;
4362         }
4363
4364         if (new_sta || override) {
4365                 err = ieee80211_prep_channel(sdata, cbss);
4366                 if (err) {
4367                         if (new_sta)
4368                                 sta_info_free(local, new_sta);
4369                         return -EINVAL;
4370                 }
4371         }
4372
4373         if (new_sta) {
4374                 u32 rates = 0, basic_rates = 0;
4375                 bool have_higher_than_11mbit;
4376                 int min_rate = INT_MAX, min_rate_index = -1;
4377                 struct ieee80211_chanctx_conf *chanctx_conf;
4378                 const struct cfg80211_bss_ies *ies;
4379                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4380                 u32 rate_flags;
4381
4382                 rcu_read_lock();
4383                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4384                 if (WARN_ON(!chanctx_conf)) {
4385                         rcu_read_unlock();
4386                         sta_info_free(local, new_sta);
4387                         return -EINVAL;
4388                 }
4389                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4390                 rcu_read_unlock();
4391
4392                 ieee80211_get_rates(sband, bss->supp_rates,
4393                                     bss->supp_rates_len,
4394                                     &rates, &basic_rates,
4395                                     &have_higher_than_11mbit,
4396                                     &min_rate, &min_rate_index,
4397                                     shift, rate_flags);
4398
4399                 /*
4400                  * This used to be a workaround for basic rates missing
4401                  * in the association response frame. Now that we no
4402                  * longer use the basic rates from there, it probably
4403                  * doesn't happen any more, but keep the workaround so
4404                  * in case some *other* APs are buggy in different ways
4405                  * we can connect -- with a warning.
4406                  */
4407                 if (!basic_rates && min_rate_index >= 0) {
4408                         sdata_info(sdata,
4409                                    "No basic rates, using min rate instead\n");
4410                         basic_rates = BIT(min_rate_index);
4411                 }
4412
4413                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4414                 sdata->vif.bss_conf.basic_rates = basic_rates;
4415
4416                 /* cf. IEEE 802.11 9.2.12 */
4417                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4418                     have_higher_than_11mbit)
4419                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4420                 else
4421                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4422
4423                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4424
4425                 /* set timing information */
4426                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4427                 rcu_read_lock();
4428                 ies = rcu_dereference(cbss->beacon_ies);
4429                 if (ies) {
4430                         const u8 *tim_ie;
4431
4432                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4433                         sdata->vif.bss_conf.sync_device_ts =
4434                                 bss->device_ts_beacon;
4435                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4436                                                   ies->data, ies->len);
4437                         if (tim_ie && tim_ie[1] >= 2)
4438                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4439                         else
4440                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4441                 } else if (!(local->hw.flags &
4442                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
4443                         ies = rcu_dereference(cbss->proberesp_ies);
4444                         /* must be non-NULL since beacon IEs were NULL */
4445                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4446                         sdata->vif.bss_conf.sync_device_ts =
4447                                 bss->device_ts_presp;
4448                         sdata->vif.bss_conf.sync_dtim_count = 0;
4449                 } else {
4450                         sdata->vif.bss_conf.sync_tsf = 0;
4451                         sdata->vif.bss_conf.sync_device_ts = 0;
4452                         sdata->vif.bss_conf.sync_dtim_count = 0;
4453                 }
4454                 rcu_read_unlock();
4455
4456                 /* tell driver about BSSID, basic rates and timing */
4457                 ieee80211_bss_info_change_notify(sdata,
4458                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4459                         BSS_CHANGED_BEACON_INT);
4460
4461                 if (assoc)
4462                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4463
4464                 err = sta_info_insert(new_sta);
4465                 new_sta = NULL;
4466                 if (err) {
4467                         sdata_info(sdata,
4468                                    "failed to insert STA entry for the AP (error %d)\n",
4469                                    err);
4470                         return err;
4471                 }
4472         } else
4473                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4474
4475         /* Cancel scan to ensure that nothing interferes with connection */
4476         if (local->scanning)
4477                 ieee80211_scan_cancel(local);
4478
4479         return 0;
4480 }
4481
4482 /* config hooks */
4483 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4484                        struct cfg80211_auth_request *req)
4485 {
4486         struct ieee80211_local *local = sdata->local;
4487         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4488         struct ieee80211_mgd_auth_data *auth_data;
4489         u16 auth_alg;
4490         int err;
4491
4492         /* prepare auth data structure */
4493
4494         switch (req->auth_type) {
4495         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4496                 auth_alg = WLAN_AUTH_OPEN;
4497                 break;
4498         case NL80211_AUTHTYPE_SHARED_KEY:
4499                 if (IS_ERR(local->wep_tx_tfm))
4500                         return -EOPNOTSUPP;
4501                 auth_alg = WLAN_AUTH_SHARED_KEY;
4502                 break;
4503         case NL80211_AUTHTYPE_FT:
4504                 auth_alg = WLAN_AUTH_FT;
4505                 break;
4506         case NL80211_AUTHTYPE_NETWORK_EAP:
4507                 auth_alg = WLAN_AUTH_LEAP;
4508                 break;
4509         case NL80211_AUTHTYPE_SAE:
4510                 auth_alg = WLAN_AUTH_SAE;
4511                 break;
4512         default:
4513                 return -EOPNOTSUPP;
4514         }
4515
4516         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4517                             req->ie_len, GFP_KERNEL);
4518         if (!auth_data)
4519                 return -ENOMEM;
4520
4521         auth_data->bss = req->bss;
4522
4523         if (req->sae_data_len >= 4) {
4524                 __le16 *pos = (__le16 *) req->sae_data;
4525                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4526                 auth_data->sae_status = le16_to_cpu(pos[1]);
4527                 memcpy(auth_data->data, req->sae_data + 4,
4528                        req->sae_data_len - 4);
4529                 auth_data->data_len += req->sae_data_len - 4;
4530         }
4531
4532         if (req->ie && req->ie_len) {
4533                 memcpy(&auth_data->data[auth_data->data_len],
4534                        req->ie, req->ie_len);
4535                 auth_data->data_len += req->ie_len;
4536         }
4537
4538         if (req->key && req->key_len) {
4539                 auth_data->key_len = req->key_len;
4540                 auth_data->key_idx = req->key_idx;
4541                 memcpy(auth_data->key, req->key, req->key_len);
4542         }
4543
4544         auth_data->algorithm = auth_alg;
4545
4546         /* try to authenticate/probe */
4547
4548         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4549             ifmgd->assoc_data) {
4550                 err = -EBUSY;
4551                 goto err_free;
4552         }
4553
4554         if (ifmgd->auth_data)
4555                 ieee80211_destroy_auth_data(sdata, false);
4556
4557         /* prep auth_data so we don't go into idle on disassoc */
4558         ifmgd->auth_data = auth_data;
4559
4560         if (ifmgd->associated) {
4561                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4562
4563                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4564                                        WLAN_REASON_UNSPECIFIED,
4565                                        false, frame_buf);
4566
4567                 ieee80211_report_disconnect(sdata, frame_buf,
4568                                             sizeof(frame_buf), true,
4569                                             WLAN_REASON_UNSPECIFIED);
4570         }
4571
4572         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4573
4574         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4575         if (err)
4576                 goto err_clear;
4577
4578         err = ieee80211_probe_auth(sdata);
4579         if (err) {
4580                 sta_info_destroy_addr(sdata, req->bss->bssid);
4581                 goto err_clear;
4582         }
4583
4584         /* hold our own reference */
4585         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4586         return 0;
4587
4588  err_clear:
4589         eth_zero_addr(ifmgd->bssid);
4590         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4591         ifmgd->auth_data = NULL;
4592  err_free:
4593         kfree(auth_data);
4594         return err;
4595 }
4596
4597 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4598                                         const u8 *wmm_param, int len)
4599 {
4600         const u8 *pos;
4601         size_t left;
4602
4603         if (len < 8)
4604                 return false;
4605
4606         if (wmm_param[5] != 1 /* version */)
4607                 return false;
4608
4609         pos = wmm_param + 8;
4610         left = len - 8;
4611
4612         for (; left >= 4; left -= 4, pos += 4) {
4613                 u8 aifsn = pos[0] & 0x0f;
4614                 u8 ecwmin = pos[1] & 0x0f;
4615                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4616                 int aci = (pos[0] >> 5) & 0x03;
4617
4618                 if (aifsn < 2) {
4619                         sdata_info(sdata,
4620                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4621                                    aifsn, aci);
4622                         return false;
4623                 }
4624                 if (ecwmin > ecwmax) {
4625                         sdata_info(sdata,
4626                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4627                                    ecwmin, ecwmax, aci);
4628                         return false;
4629                 }
4630         }
4631
4632         return true;
4633 }
4634
4635 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4636                         struct cfg80211_assoc_request *req)
4637 {
4638         struct ieee80211_local *local = sdata->local;
4639         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4640         struct ieee80211_bss *bss = (void *)req->bss->priv;
4641         struct ieee80211_mgd_assoc_data *assoc_data;
4642         const struct cfg80211_bss_ies *beacon_ies;
4643         struct ieee80211_supported_band *sband;
4644         const u8 *ssidie, *ht_ie, *vht_ie;
4645         int i, err;
4646         bool override = false;
4647
4648         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4649         if (!assoc_data)
4650                 return -ENOMEM;
4651
4652         rcu_read_lock();
4653         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4654         if (!ssidie) {
4655                 rcu_read_unlock();
4656                 kfree(assoc_data);
4657                 return -EINVAL;
4658         }
4659         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4660         assoc_data->ssid_len = ssidie[1];
4661         rcu_read_unlock();
4662
4663         if (ifmgd->associated) {
4664                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4665
4666                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4667                                        WLAN_REASON_UNSPECIFIED,
4668                                        false, frame_buf);
4669
4670                 ieee80211_report_disconnect(sdata, frame_buf,
4671                                             sizeof(frame_buf), true,
4672                                             WLAN_REASON_UNSPECIFIED);
4673         }
4674
4675         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4676                 err = -EBUSY;
4677                 goto err_free;
4678         }
4679
4680         if (ifmgd->assoc_data) {
4681                 err = -EBUSY;
4682                 goto err_free;
4683         }
4684
4685         if (ifmgd->auth_data) {
4686                 bool match;
4687
4688                 /* keep sta info, bssid if matching */
4689                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4690                 ieee80211_destroy_auth_data(sdata, match);
4691         }
4692
4693         /* prepare assoc data */
4694
4695         ifmgd->beacon_crc_valid = false;
4696
4697         assoc_data->wmm = bss->wmm_used &&
4698                           (local->hw.queues >= IEEE80211_NUM_ACS);
4699         if (assoc_data->wmm) {
4700                 /* try to check validity of WMM params IE */
4701                 const struct cfg80211_bss_ies *ies;
4702                 const u8 *wp, *start, *end;
4703
4704                 rcu_read_lock();
4705                 ies = rcu_dereference(req->bss->ies);
4706                 start = ies->data;
4707                 end = start + ies->len;
4708
4709                 while (true) {
4710                         wp = cfg80211_find_vendor_ie(
4711                                 WLAN_OUI_MICROSOFT,
4712                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4713                                 start, end - start);
4714                         if (!wp)
4715                                 break;
4716                         start = wp + wp[1] + 2;
4717                         /* if this IE is too short, try the next */
4718                         if (wp[1] <= 4)
4719                                 continue;
4720                         /* if this IE is WMM params, we found what we wanted */
4721                         if (wp[6] == 1)
4722                                 break;
4723                 }
4724
4725                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4726                                                         wp[1] - 2)) {
4727                         assoc_data->wmm = false;
4728                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4729                 }
4730                 rcu_read_unlock();
4731         }
4732
4733         /*
4734          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4735          * We still associate in non-HT mode (11a/b/g) if any one of these
4736          * ciphers is configured as pairwise.
4737          * We can set this to true for non-11n hardware, that'll be checked
4738          * separately along with the peer capabilities.
4739          */
4740         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4741                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4742                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4743                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4744                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4745                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4746                         netdev_info(sdata->dev,
4747                                     "disabling HT/VHT due to WEP/TKIP use\n");
4748                 }
4749         }
4750
4751         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4752         sband = local->hw.wiphy->bands[req->bss->channel->band];
4753         if (!sband->ht_cap.ht_supported ||
4754             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4755             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4756                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4757                 if (!bss->wmm_used &&
4758                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4759                         netdev_info(sdata->dev,
4760                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4761         }
4762
4763         /* disable VHT if we don't support it or the AP doesn't use WMM */
4764         if (!sband->vht_cap.vht_supported ||
4765             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4766             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4767                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4768                 if (!bss->wmm_used &&
4769                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4770                         netdev_info(sdata->dev,
4771                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4772         }
4773
4774         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4775         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4776                sizeof(ifmgd->ht_capa_mask));
4777
4778         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4779         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4780                sizeof(ifmgd->vht_capa_mask));
4781
4782         if (req->ie && req->ie_len) {
4783                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4784                 assoc_data->ie_len = req->ie_len;
4785         }
4786
4787         assoc_data->bss = req->bss;
4788
4789         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4790                 if (ifmgd->powersave)
4791                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4792                 else
4793                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4794         } else
4795                 sdata->smps_mode = ifmgd->req_smps;
4796
4797         assoc_data->capability = req->bss->capability;
4798         assoc_data->supp_rates = bss->supp_rates;
4799         assoc_data->supp_rates_len = bss->supp_rates_len;
4800
4801         rcu_read_lock();
4802         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4803         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4804                 assoc_data->ap_ht_param =
4805                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4806         else
4807                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4808         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4809         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4810                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4811                        sizeof(struct ieee80211_vht_cap));
4812         else
4813                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4814         rcu_read_unlock();
4815
4816         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4817                  (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4818              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4819                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4820
4821         if (bss->wmm_used && bss->uapsd_supported &&
4822             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4823                 assoc_data->uapsd = true;
4824                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4825         } else {
4826                 assoc_data->uapsd = false;
4827                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4828         }
4829
4830         if (req->prev_bssid)
4831                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4832
4833         if (req->use_mfp) {
4834                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4835                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4836         } else {
4837                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4838                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4839         }
4840
4841         if (req->flags & ASSOC_REQ_USE_RRM)
4842                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4843         else
4844                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4845
4846         if (req->crypto.control_port)
4847                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4848         else
4849                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4850
4851         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4852         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4853         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4854                                                         sdata->vif.type);
4855
4856         /* kick off associate process */
4857
4858         ifmgd->assoc_data = assoc_data;
4859         ifmgd->dtim_period = 0;
4860         ifmgd->have_beacon = false;
4861
4862         /* override HT/VHT configuration only if the AP and we support it */
4863         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4864                 struct ieee80211_sta_ht_cap sta_ht_cap;
4865
4866                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4867                         override = true;
4868
4869                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4870                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4871
4872                 /* check for 40 MHz disable override */
4873                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4874                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4875                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4876                         override = true;
4877
4878                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4879                     req->flags & ASSOC_REQ_DISABLE_VHT)
4880                         override = true;
4881         }
4882
4883         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4884                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4885                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4886         }
4887
4888         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4889                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4890
4891         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4892         if (err)
4893                 goto err_clear;
4894
4895         rcu_read_lock();
4896         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4897
4898         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4899             !beacon_ies) {
4900                 /*
4901                  * Wait up to one beacon interval ...
4902                  * should this be more if we miss one?
4903                  */
4904                 sdata_info(sdata, "waiting for beacon from %pM\n",
4905                            ifmgd->bssid);
4906                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4907                 assoc_data->timeout_started = true;
4908                 assoc_data->need_beacon = true;
4909         } else if (beacon_ies) {
4910                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4911                                                     beacon_ies->data,
4912                                                     beacon_ies->len);
4913                 u8 dtim_count = 0;
4914
4915                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4916                         const struct ieee80211_tim_ie *tim;
4917                         tim = (void *)(tim_ie + 2);
4918                         ifmgd->dtim_period = tim->dtim_period;
4919                         dtim_count = tim->dtim_count;
4920                 }
4921                 ifmgd->have_beacon = true;
4922                 assoc_data->timeout = jiffies;
4923                 assoc_data->timeout_started = true;
4924
4925                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4926                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4927                         sdata->vif.bss_conf.sync_device_ts =
4928                                 bss->device_ts_beacon;
4929                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4930                 }
4931         } else {
4932                 assoc_data->timeout = jiffies;
4933                 assoc_data->timeout_started = true;
4934         }
4935         rcu_read_unlock();
4936
4937         run_again(sdata, assoc_data->timeout);
4938
4939         if (bss->corrupt_data) {
4940                 char *corrupt_type = "data";
4941                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4942                         if (bss->corrupt_data &
4943                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4944                                 corrupt_type = "beacon and probe response";
4945                         else
4946                                 corrupt_type = "beacon";
4947                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4948                         corrupt_type = "probe response";
4949                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4950                            corrupt_type);
4951         }
4952
4953         return 0;
4954  err_clear:
4955         eth_zero_addr(ifmgd->bssid);
4956         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4957         ifmgd->assoc_data = NULL;
4958  err_free:
4959         kfree(assoc_data);
4960         return err;
4961 }
4962
4963 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4964                          struct cfg80211_deauth_request *req)
4965 {
4966         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4967         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4968         bool tx = !req->local_state_change;
4969
4970         if (ifmgd->auth_data &&
4971             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4972                 sdata_info(sdata,
4973                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4974                            req->bssid, req->reason_code,
4975                            ieee80211_get_reason_code_string(req->reason_code));
4976
4977                 drv_mgd_prepare_tx(sdata->local, sdata);
4978                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4979                                                IEEE80211_STYPE_DEAUTH,
4980                                                req->reason_code, tx,
4981                                                frame_buf);
4982                 ieee80211_destroy_auth_data(sdata, false);
4983                 ieee80211_report_disconnect(sdata, frame_buf,
4984                                             sizeof(frame_buf), true,
4985                                             req->reason_code);
4986
4987                 return 0;
4988         }
4989
4990         if (ifmgd->associated &&
4991             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4992                 sdata_info(sdata,
4993                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4994                            req->bssid, req->reason_code,
4995                            ieee80211_get_reason_code_string(req->reason_code));
4996
4997                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4998                                        req->reason_code, tx, frame_buf);
4999                 ieee80211_report_disconnect(sdata, frame_buf,
5000                                             sizeof(frame_buf), true,
5001                                             req->reason_code);
5002                 return 0;
5003         }
5004
5005         return -ENOTCONN;
5006 }
5007
5008 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5009                            struct cfg80211_disassoc_request *req)
5010 {
5011         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5012         u8 bssid[ETH_ALEN];
5013         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5014
5015         /*
5016          * cfg80211 should catch this ... but it's racy since
5017          * we can receive a disassoc frame, process it, hand it
5018          * to cfg80211 while that's in a locked section already
5019          * trying to tell us that the user wants to disconnect.
5020          */
5021         if (ifmgd->associated != req->bss)
5022                 return -ENOLINK;
5023
5024         sdata_info(sdata,
5025                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5026                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5027
5028         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5029         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5030                                req->reason_code, !req->local_state_change,
5031                                frame_buf);
5032
5033         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5034                                     req->reason_code);
5035
5036         return 0;
5037 }
5038
5039 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5040 {
5041         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5042
5043         /*
5044          * Make sure some work items will not run after this,
5045          * they will not do anything but might not have been
5046          * cancelled when disconnecting.
5047          */
5048         cancel_work_sync(&ifmgd->monitor_work);
5049         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5050         cancel_work_sync(&ifmgd->request_smps_work);
5051         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5052         cancel_work_sync(&ifmgd->chswitch_work);
5053         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5054
5055         sdata_lock(sdata);
5056         if (ifmgd->assoc_data) {
5057                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5058                 ieee80211_destroy_assoc_data(sdata, false);
5059                 cfg80211_assoc_timeout(sdata->dev, bss);
5060         }
5061         if (ifmgd->auth_data)
5062                 ieee80211_destroy_auth_data(sdata, false);
5063         spin_lock_bh(&ifmgd->teardown_lock);
5064         if (ifmgd->teardown_skb) {
5065                 kfree_skb(ifmgd->teardown_skb);
5066                 ifmgd->teardown_skb = NULL;
5067                 ifmgd->orig_teardown_skb = NULL;
5068         }
5069         spin_unlock_bh(&ifmgd->teardown_lock);
5070         del_timer_sync(&ifmgd->timer);
5071         sdata_unlock(sdata);
5072 }
5073
5074 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5075                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5076                                gfp_t gfp)
5077 {
5078         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5079
5080         trace_api_cqm_rssi_notify(sdata, rssi_event);
5081
5082         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5083 }
5084 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5085
5086 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5087 {
5088         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5089
5090         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5091
5092         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5093 }
5094 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);