net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  34 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  35 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  36 #define IEEE80211_AUTH_MAX_TRIES        3
  37 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  38 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  39 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  40 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  41 #define IEEE80211_ASSOC_MAX_TRIES       3
  42
  43 static int max_nullfunc_tries = 2;
  44 module_param(max_nullfunc_tries, int, 0644);
  45 MODULE_PARM_DESC(max_nullfunc_tries,
  46                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  47
  48 static int max_probe_tries = 5;
  49 module_param(max_probe_tries, int, 0644);
  50 MODULE_PARM_DESC(max_probe_tries,
  51                  "Maximum probe tries before disconnecting (reason 4).");
  52
  53 /*
  54  * Beacon loss timeout is calculated as N frames times the
  55  * advertised beacon interval.  This may need to be somewhat
  56  * higher than what hardware might detect to account for
  57  * delays in the host processing frames. But since we also
  58  * probe on beacon miss before declaring the connection lost
  59  * default to what we want.
  60  */
  61 static int beacon_loss_count = 7;
  62 module_param(beacon_loss_count, int, 0644);
  63 MODULE_PARM_DESC(beacon_loss_count,
  64                  "Number of beacon intervals before we decide beacon was lost.");
  65
  66 /*
  67  * Time the connection can be idle before we probe
  68  * it to see if we can still talk to the AP.
  69  */
  70 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  71 /*
  72  * Time we wait for a probe response after sending
  73  * a probe request because of beacon loss or for
  74  * checking the connection still works.
  75  */
  76 static int probe_wait_ms = 500;
  77 module_param(probe_wait_ms, int, 0644);
  78 MODULE_PARM_DESC(probe_wait_ms,
  79                  "Maximum time(ms) to wait for probe response"
  80                  " before disconnecting (reason 4).");
  81
  82 /*
  83  * Weight given to the latest Beacon frame when calculating average signal
  84  * strength for Beacon frames received in the current BSS. This must be
  85  * between 1 and 15.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  88
  89 /*
  90  * How many Beacon frames need to have been used in average signal strength
  91  * before starting to indicate signal change events.
  92  */
  93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  94
  95 /*
  96  * We can have multiple work items (and connection probing)
  97  * scheduling this timer, but we need to take care to only
  98  * reschedule it when it should fire _earlier_ than it was
  99  * asked for before, or if it's not pending right now. This
 100  * function ensures that. Note that it then is required to
 101  * run this function for all timeouts after the first one
 102  * has happened -- the work that runs from this timer will
 103  * do that.
 104  */
 105 static void run_again(struct ieee80211_sub_if_data *sdata,
 106                       unsigned long timeout)
 107 {
 108         sdata_assert_lock(sdata);
 109
 110         if (!timer_pending(&sdata->u.mgd.timer) ||
 111             time_before(timeout, sdata->u.mgd.timer.expires))
 112                 mod_timer(&sdata->u.mgd.timer, timeout);
 113 }
 114
 115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 116 {
 117         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 118                 return;
 119
 120         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 121                 return;
 122
 123         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 124                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 125 }
 126
 127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 128 {
 129         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 130
 131         if (unlikely(!sdata->u.mgd.associated))
 132                 return;
 133
 134         ifmgd->probe_send_count = 0;
 135
 136         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 137                 return;
 138
 139         mod_timer(&sdata->u.mgd.conn_mon_timer,
 140                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 141 }
 142
 143 static int ecw2cw(int ecw)
 144 {
 145         return (1 << ecw) - 1;
 146 }
 147
 148 static u32
 149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 150                              struct ieee80211_supported_band *sband,
 151                              struct ieee80211_channel *channel,
 152                              const struct ieee80211_ht_operation *ht_oper,
 153                              const struct ieee80211_vht_operation *vht_oper,
 154                              struct cfg80211_chan_def *chandef, bool tracking)
 155 {
 156         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 157         struct cfg80211_chan_def vht_chandef;
 158         u32 ht_cfreq, ret;
 159
 160         chandef->chan = channel;
 161         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 162         chandef->center_freq1 = channel->center_freq;
 163         chandef->center_freq2 = 0;
 164
 165         if (!ht_oper || !sband->ht_cap.ht_supported) {
 166                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 167                 goto out;
 168         }
 169
 170         chandef->width = NL80211_CHAN_WIDTH_20;
 171
 172         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 173                                                   channel->band);
 174         /* check that channel matches the right operating channel */
 175         if (!tracking && channel->center_freq != ht_cfreq) {
 176                 /*
 177                  * It's possible that some APs are confused here;
 178                  * Netgear WNDR3700 sometimes reports 4 higher than
 179                  * the actual channel in association responses, but
 180                  * since we look at probe response/beacon data here
 181                  * it should be OK.
 182                  */
 183                 sdata_info(sdata,
 184                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 185                            channel->center_freq, ht_cfreq,
 186                            ht_oper->primary_chan, channel->band);
 187                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 188                 goto out;
 189         }
 190
 191         /* check 40 MHz support, if we have it */
 192         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 193                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 194                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 195                         chandef->width = NL80211_CHAN_WIDTH_40;
 196                         chandef->center_freq1 += 10;
 197                         break;
 198                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 199                         chandef->width = NL80211_CHAN_WIDTH_40;
 200                         chandef->center_freq1 -= 10;
 201                         break;
 202                 }
 203         } else {
 204                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 205                 ret = IEEE80211_STA_DISABLE_VHT;
 206                 /* also mark 40 MHz disabled */
 207                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 208                 goto out;
 209         }
 210
 211         if (!vht_oper || !sband->vht_cap.vht_supported) {
 212                 ret = IEEE80211_STA_DISABLE_VHT;
 213                 goto out;
 214         }
 215
 216         vht_chandef.chan = channel;
 217         vht_chandef.center_freq1 =
 218                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 219                                                channel->band);
 220         vht_chandef.center_freq2 = 0;
 221
 222         switch (vht_oper->chan_width) {
 223         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 224                 vht_chandef.width = chandef->width;
 225                 vht_chandef.center_freq1 = chandef->center_freq1;
 226                 break;
 227         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 228                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 229                 break;
 230         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 231                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 232                 break;
 233         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 234                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 235                 vht_chandef.center_freq2 =
 236                         ieee80211_channel_to_frequency(
 237                                 vht_oper->center_freq_seg2_idx,
 238                                 channel->band);
 239                 break;
 240         default:
 241                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 242                         sdata_info(sdata,
 243                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 244                                    vht_oper->chan_width);
 245                 ret = IEEE80211_STA_DISABLE_VHT;
 246                 goto out;
 247         }
 248
 249         if (!cfg80211_chandef_valid(&vht_chandef)) {
 250                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 251                         sdata_info(sdata,
 252                                    "AP VHT information is invalid, disable VHT\n");
 253                 ret = IEEE80211_STA_DISABLE_VHT;
 254                 goto out;
 255         }
 256
 257         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 258                 ret = 0;
 259                 goto out;
 260         }
 261
 262         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 263                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 264                         sdata_info(sdata,
 265                                    "AP VHT information doesn't match HT, disable VHT\n");
 266                 ret = IEEE80211_STA_DISABLE_VHT;
 267                 goto out;
 268         }
 269
 270         *chandef = vht_chandef;
 271
 272         ret = 0;
 273
 274 out:
 275         /*
 276          * When tracking the current AP, don't do any further checks if the
 277          * new chandef is identical to the one we're currently using for the
 278          * connection. This keeps us from playing ping-pong with regulatory,
 279          * without it the following can happen (for example):
 280          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 281          *  - AP advertises regdom US
 282          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 283          *  - the code below detects an unsupported channel, downgrades, and
 284          *    we disconnect from the AP in the caller
 285          *  - disconnect causes CRDA to reload world regdomain and the game
 286          *    starts anew.
 287          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 288          *
 289          * It seems possible that there are still scenarios with CSA or real
 290          * bandwidth changes where a this could happen, but those cases are
 291          * less common and wouldn't completely prevent using the AP.
 292          */
 293         if (tracking &&
 294             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 295                 return ret;
 296
 297         /* don't print the message below for VHT mismatch if VHT is disabled */
 298         if (ret & IEEE80211_STA_DISABLE_VHT)
 299                 vht_chandef = *chandef;
 300
 301         /*
 302          * Ignore the DISABLED flag when we're already connected and only
 303          * tracking the APs beacon for bandwidth changes - otherwise we
 304          * might get disconnected here if we connect to an AP, update our
 305          * regulatory information based on the AP's country IE and the
 306          * information we have is wrong/outdated and disables the channel
 307          * that we're actually using for the connection to the AP.
 308          */
 309         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 310                                         tracking ? 0 :
 311                                                    IEEE80211_CHAN_DISABLED)) {
 312                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 313                         ret = IEEE80211_STA_DISABLE_HT |
 314                               IEEE80211_STA_DISABLE_VHT;
 315                         break;
 316                 }
 317
 318                 ret |= ieee80211_chandef_downgrade(chandef);
 319         }
 320
 321         if (chandef->width != vht_chandef.width && !tracking)
 322                 sdata_info(sdata,
 323                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 324
 325         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 326         return ret;
 327 }
 328
 329 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 330                                struct sta_info *sta,
 331                                const struct ieee80211_ht_operation *ht_oper,
 332                                const struct ieee80211_vht_operation *vht_oper,
 333                                const u8 *bssid, u32 *changed)
 334 {
 335         struct ieee80211_local *local = sdata->local;
 336         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 337         struct ieee80211_supported_band *sband;
 338         struct ieee80211_channel *chan;
 339         struct cfg80211_chan_def chandef;
 340         u16 ht_opmode;
 341         u32 flags;
 342         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 343         int ret;
 344
 345         /* if HT was/is disabled, don't track any bandwidth changes */
 346         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 347                 return 0;
 348
 349         /* don't check VHT if we associated as non-VHT station */
 350         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 351                 vht_oper = NULL;
 352
 353         if (WARN_ON_ONCE(!sta))
 354                 return -EINVAL;
 355
 356         /*
 357          * if bss configuration changed store the new one -
 358          * this may be applicable even if channel is identical
 359          */
 360         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 361         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 362                 *changed |= BSS_CHANGED_HT;
 363                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 364         }
 365
 366         chan = sdata->vif.bss_conf.chandef.chan;
 367         sband = local->hw.wiphy->bands[chan->band];
 368
 369         /* calculate new channel (type) based on HT/VHT operation IEs */
 370         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 371                                              vht_oper, &chandef, true);
 372
 373         /*
 374          * Downgrade the new channel if we associated with restricted
 375          * capabilities. For example, if we associated as a 20 MHz STA
 376          * to a 40 MHz AP (due to regulatory, capabilities or config
 377          * reasons) then switching to a 40 MHz channel now won't do us
 378          * any good -- we couldn't use it with the AP.
 379          */
 380         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 381             chandef.width == NL80211_CHAN_WIDTH_80P80)
 382                 flags |= ieee80211_chandef_downgrade(&chandef);
 383         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 384             chandef.width == NL80211_CHAN_WIDTH_160)
 385                 flags |= ieee80211_chandef_downgrade(&chandef);
 386         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 387             chandef.width > NL80211_CHAN_WIDTH_20)
 388                 flags |= ieee80211_chandef_downgrade(&chandef);
 389
 390         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 391                 return 0;
 392
 393         sdata_info(sdata,
 394                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 395                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 396                    chandef.center_freq1, chandef.center_freq2);
 397
 398         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 399                                       IEEE80211_STA_DISABLE_VHT |
 400                                       IEEE80211_STA_DISABLE_40MHZ |
 401                                       IEEE80211_STA_DISABLE_80P80MHZ |
 402                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 403             !cfg80211_chandef_valid(&chandef)) {
 404                 sdata_info(sdata,
 405                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 406                            ifmgd->bssid);
 407                 return -EINVAL;
 408         }
 409
 410         switch (chandef.width) {
 411         case NL80211_CHAN_WIDTH_20_NOHT:
 412         case NL80211_CHAN_WIDTH_20:
 413                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 414                 break;
 415         case NL80211_CHAN_WIDTH_40:
 416                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 417                 break;
 418         case NL80211_CHAN_WIDTH_80:
 419                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 420                 break;
 421         case NL80211_CHAN_WIDTH_80P80:
 422         case NL80211_CHAN_WIDTH_160:
 423                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 424                 break;
 425         default:
 426                 return -EINVAL;
 427         }
 428
 429         if (new_sta_bw > sta->cur_max_bandwidth)
 430                 new_sta_bw = sta->cur_max_bandwidth;
 431
 432         if (new_sta_bw < sta->sta.bandwidth) {
 433                 sta->sta.bandwidth = new_sta_bw;
 434                 rate_control_rate_update(local, sband, sta,
 435                                          IEEE80211_RC_BW_CHANGED);
 436         }
 437
 438         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 439         if (ret) {
 440                 sdata_info(sdata,
 441                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 442                            ifmgd->bssid);
 443                 return ret;
 444         }
 445
 446         if (new_sta_bw > sta->sta.bandwidth) {
 447                 sta->sta.bandwidth = new_sta_bw;
 448                 rate_control_rate_update(local, sband, sta,
 449                                          IEEE80211_RC_BW_CHANGED);
 450         }
 451
 452         return 0;
 453 }
 454
 455 /* frame sending functions */
 456
 457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 458                                 struct sk_buff *skb, u8 ap_ht_param,
 459                                 struct ieee80211_supported_band *sband,
 460                                 struct ieee80211_channel *channel,
 461                                 enum ieee80211_smps_mode smps)
 462 {
 463         u8 *pos;
 464         u32 flags = channel->flags;
 465         u16 cap;
 466         struct ieee80211_sta_ht_cap ht_cap;
 467
 468         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 469
 470         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 471         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 472
 473         /* determine capability flags */
 474         cap = ht_cap.cap;
 475
 476         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 477         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 478                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 479                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 480                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 481                 }
 482                 break;
 483         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 484                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 485                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 486                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 487                 }
 488                 break;
 489         }
 490
 491         /*
 492          * If 40 MHz was disabled associate as though we weren't
 493          * capable of 40 MHz -- some broken APs will never fall
 494          * back to trying to transmit in 20 MHz.
 495          */
 496         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 497                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 498                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 499         }
 500
 501         /* set SM PS mode properly */
 502         cap &= ~IEEE80211_HT_CAP_SM_PS;
 503         switch (smps) {
 504         case IEEE80211_SMPS_AUTOMATIC:
 505         case IEEE80211_SMPS_NUM_MODES:
 506                 WARN_ON(1);
 507         case IEEE80211_SMPS_OFF:
 508                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 509                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 510                 break;
 511         case IEEE80211_SMPS_STATIC:
 512                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 513                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 514                 break;
 515         case IEEE80211_SMPS_DYNAMIC:
 516                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 517                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 518                 break;
 519         }
 520
 521         /* reserve and fill IE */
 522         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 523         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 524 }
 525
 526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 527                                  struct sk_buff *skb,
 528                                  struct ieee80211_supported_band *sband,
 529                                  struct ieee80211_vht_cap *ap_vht_cap)
 530 {
 531         u8 *pos;
 532         u32 cap;
 533         struct ieee80211_sta_vht_cap vht_cap;
 534         u32 mask, ap_bf_sts, our_bf_sts;
 535
 536         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 537
 538         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 539         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 540
 541         /* determine capability flags */
 542         cap = vht_cap.cap;
 543
 544         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 545                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 546                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 547         }
 548
 549         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 550                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 551                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 552         }
 553
 554         /*
 555          * Some APs apparently get confused if our capabilities are better
 556          * than theirs, so restrict what we advertise in the assoc request.
 557          */
 558         if (!(ap_vht_cap->vht_cap_info &
 559                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 560                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 561
 562         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 563
 564         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 565         our_bf_sts = cap & mask;
 566
 567         if (ap_bf_sts < our_bf_sts) {
 568                 cap &= ~mask;
 569                 cap |= ap_bf_sts;
 570         }
 571
 572         /* reserve and fill IE */
 573         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 574         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 575 }
 576
 577 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 578 {
 579         struct ieee80211_local *local = sdata->local;
 580         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 581         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 582         struct sk_buff *skb;
 583         struct ieee80211_mgmt *mgmt;
 584         u8 *pos, qos_info;
 585         size_t offset = 0, noffset;
 586         int i, count, rates_len, supp_rates_len, shift;
 587         u16 capab;
 588         struct ieee80211_supported_band *sband;
 589         struct ieee80211_chanctx_conf *chanctx_conf;
 590         struct ieee80211_channel *chan;
 591         u32 rate_flags, rates = 0;
 592
 593         sdata_assert_lock(sdata);
 594
 595         rcu_read_lock();
 596         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 597         if (WARN_ON(!chanctx_conf)) {
 598                 rcu_read_unlock();
 599                 return;
 600         }
 601         chan = chanctx_conf->def.chan;
 602         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 603         rcu_read_unlock();
 604         sband = local->hw.wiphy->bands[chan->band];
 605         shift = ieee80211_vif_get_shift(&sdata->vif);
 606
 607         if (assoc_data->supp_rates_len) {
 608                 /*
 609                  * Get all rates supported by the device and the AP as
 610                  * some APs don't like getting a superset of their rates
 611                  * in the association request (e.g. D-Link DAP 1353 in
 612                  * b-only mode)...
 613                  */
 614                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 615                                                      assoc_data->supp_rates,
 616                                                      assoc_data->supp_rates_len,
 617                                                      &rates);
 618         } else {
 619                 /*
 620                  * In case AP not provide any supported rates information
 621                  * before association, we send information element(s) with
 622                  * all rates that we support.
 623                  */
 624                 rates_len = 0;
 625                 for (i = 0; i < sband->n_bitrates; i++) {
 626                         if ((rate_flags & sband->bitrates[i].flags)
 627                             != rate_flags)
 628                                 continue;
 629                         rates |= BIT(i);
 630                         rates_len++;
 631                 }
 632         }
 633
 634         skb = alloc_skb(local->hw.extra_tx_headroom +
 635                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 636                         2 + assoc_data->ssid_len + /* SSID */
 637                         4 + rates_len + /* (extended) rates */
 638                         4 + /* power capability */
 639                         2 + 2 * sband->n_channels + /* supported channels */
 640                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 641                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 642                         assoc_data->ie_len + /* extra IEs */
 643                         9, /* WMM */
 644                         GFP_KERNEL);
 645         if (!skb)
 646                 return;
 647
 648         skb_reserve(skb, local->hw.extra_tx_headroom);
 649
 650         capab = WLAN_CAPABILITY_ESS;
 651
 652         if (sband->band == IEEE80211_BAND_2GHZ) {
 653                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 654                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 655                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 656                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 657         }
 658
 659         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 660                 capab |= WLAN_CAPABILITY_PRIVACY;
 661
 662         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 663             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 664                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 665
 666         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 667         memset(mgmt, 0, 24);
 668         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 669         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 670         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 671
 672         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 673                 skb_put(skb, 10);
 674                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 675                                                   IEEE80211_STYPE_REASSOC_REQ);
 676                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 677                 mgmt->u.reassoc_req.listen_interval =
 678                                 cpu_to_le16(local->hw.conf.listen_interval);
 679                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 680                        ETH_ALEN);
 681         } else {
 682                 skb_put(skb, 4);
 683                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 684                                                   IEEE80211_STYPE_ASSOC_REQ);
 685                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 686                 mgmt->u.assoc_req.listen_interval =
 687                                 cpu_to_le16(local->hw.conf.listen_interval);
 688         }
 689
 690         /* SSID */
 691         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 692         *pos++ = WLAN_EID_SSID;
 693         *pos++ = assoc_data->ssid_len;
 694         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 695
 696         /* add all rates which were marked to be used above */
 697         supp_rates_len = rates_len;
 698         if (supp_rates_len > 8)
 699                 supp_rates_len = 8;
 700
 701         pos = skb_put(skb, supp_rates_len + 2);
 702         *pos++ = WLAN_EID_SUPP_RATES;
 703         *pos++ = supp_rates_len;
 704
 705         count = 0;
 706         for (i = 0; i < sband->n_bitrates; i++) {
 707                 if (BIT(i) & rates) {
 708                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 709                                                 5 * (1 << shift));
 710                         *pos++ = (u8) rate;
 711                         if (++count == 8)
 712                                 break;
 713                 }
 714         }
 715
 716         if (rates_len > count) {
 717                 pos = skb_put(skb, rates_len - count + 2);
 718                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 719                 *pos++ = rates_len - count;
 720
 721                 for (i++; i < sband->n_bitrates; i++) {
 722                         if (BIT(i) & rates) {
 723                                 int rate;
 724                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 725                                                     5 * (1 << shift));
 726                                 *pos++ = (u8) rate;
 727                         }
 728                 }
 729         }
 730
 731         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 732                 /* 1. power capabilities */
 733                 pos = skb_put(skb, 4);
 734                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 735                 *pos++ = 2;
 736                 *pos++ = 0; /* min tx power */
 737                  /* max tx power */
 738                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 739
 740                 /* 2. supported channels */
 741                 /* TODO: get this in reg domain format */
 742                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 743                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 744                 *pos++ = 2 * sband->n_channels;
 745                 for (i = 0; i < sband->n_channels; i++) {
 746                         *pos++ = ieee80211_frequency_to_channel(
 747                                         sband->channels[i].center_freq);
 748                         *pos++ = 1; /* one channel in the subband*/
 749                 }
 750         }
 751
 752         /* if present, add any custom IEs that go before HT */
 753         if (assoc_data->ie_len) {
 754                 static const u8 before_ht[] = {
 755                         WLAN_EID_SSID,
 756                         WLAN_EID_SUPP_RATES,
 757                         WLAN_EID_EXT_SUPP_RATES,
 758                         WLAN_EID_PWR_CAPABILITY,
 759                         WLAN_EID_SUPPORTED_CHANNELS,
 760                         WLAN_EID_RSN,
 761                         WLAN_EID_QOS_CAPA,
 762                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 763                         WLAN_EID_MOBILITY_DOMAIN,
 764                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 765                 };
 766                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 767                                              before_ht, ARRAY_SIZE(before_ht),
 768                                              offset);
 769                 pos = skb_put(skb, noffset - offset);
 770                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 771                 offset = noffset;
 772         }
 773
 774         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 775                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 776                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 777
 778         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 779                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 780                                     sband, chan, sdata->smps_mode);
 781
 782         /* if present, add any custom IEs that go before VHT */
 783         if (assoc_data->ie_len) {
 784                 static const u8 before_vht[] = {
 785                         WLAN_EID_SSID,
 786                         WLAN_EID_SUPP_RATES,
 787                         WLAN_EID_EXT_SUPP_RATES,
 788                         WLAN_EID_PWR_CAPABILITY,
 789                         WLAN_EID_SUPPORTED_CHANNELS,
 790                         WLAN_EID_RSN,
 791                         WLAN_EID_QOS_CAPA,
 792                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 793                         WLAN_EID_MOBILITY_DOMAIN,
 794                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 795                         WLAN_EID_HT_CAPABILITY,
 796                         WLAN_EID_BSS_COEX_2040,
 797                         WLAN_EID_EXT_CAPABILITY,
 798                         WLAN_EID_QOS_TRAFFIC_CAPA,
 799                         WLAN_EID_TIM_BCAST_REQ,
 800                         WLAN_EID_INTERWORKING,
 801                 };
 802                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 803                                              before_vht, ARRAY_SIZE(before_vht),
 804                                              offset);
 805                 pos = skb_put(skb, noffset - offset);
 806                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 807                 offset = noffset;
 808         }
 809
 810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 811                 ieee80211_add_vht_ie(sdata, skb, sband,
 812                                      &assoc_data->ap_vht_cap);
 813
 814         /* if present, add any custom non-vendor IEs that go after HT */
 815         if (assoc_data->ie_len) {
 816                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 817                                                     assoc_data->ie_len,
 818                                                     offset);
 819                 pos = skb_put(skb, noffset - offset);
 820                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 821                 offset = noffset;
 822         }
 823
 824         if (assoc_data->wmm) {
 825                 if (assoc_data->uapsd) {
 826                         qos_info = ifmgd->uapsd_queues;
 827                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 828                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 829                 } else {
 830                         qos_info = 0;
 831                 }
 832
 833                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 834         }
 835
 836         /* add any remaining custom (i.e. vendor specific here) IEs */
 837         if (assoc_data->ie_len) {
 838                 noffset = assoc_data->ie_len;
 839                 pos = skb_put(skb, noffset - offset);
 840                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 841         }
 842
 843         drv_mgd_prepare_tx(local, sdata);
 844
 845         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 846         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 847                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 848                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 849         ieee80211_tx_skb(sdata, skb);
 850 }
 851
 852 void ieee80211_send_pspoll(struct ieee80211_local *local,
 853                            struct ieee80211_sub_if_data *sdata)
 854 {
 855         struct ieee80211_pspoll *pspoll;
 856         struct sk_buff *skb;
 857
 858         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 859         if (!skb)
 860                 return;
 861
 862         pspoll = (struct ieee80211_pspoll *) skb->data;
 863         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 864
 865         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 866         ieee80211_tx_skb(sdata, skb);
 867 }
 868
 869 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 870                              struct ieee80211_sub_if_data *sdata,
 871                              int powersave)
 872 {
 873         struct sk_buff *skb;
 874         struct ieee80211_hdr_3addr *nullfunc;
 875         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 876
 877         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 878         if (!skb)
 879                 return;
 880
 881         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 882         if (powersave)
 883                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 884
 885         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 886                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 887
 888         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 889                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 890
 891         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 892                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 893
 894         ieee80211_tx_skb(sdata, skb);
 895 }
 896
 897 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 898                                           struct ieee80211_sub_if_data *sdata)
 899 {
 900         struct sk_buff *skb;
 901         struct ieee80211_hdr *nullfunc;
 902         __le16 fc;
 903
 904         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 905                 return;
 906
 907         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 908         if (!skb)
 909                 return;
 910
 911         skb_reserve(skb, local->hw.extra_tx_headroom);
 912
 913         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 914         memset(nullfunc, 0, 30);
 915         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 916                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 917         nullfunc->frame_control = fc;
 918         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 919         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 920         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 921         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 922
 923         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 924         ieee80211_tx_skb(sdata, skb);
 925 }
 926
 927 /* spectrum management related things */
 928 static void ieee80211_chswitch_work(struct work_struct *work)
 929 {
 930         struct ieee80211_sub_if_data *sdata =
 931                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 932         struct ieee80211_local *local = sdata->local;
 933         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 934         int ret;
 935
 936         if (!ieee80211_sdata_running(sdata))
 937                 return;
 938
 939         sdata_lock(sdata);
 940         mutex_lock(&local->mtx);
 941         mutex_lock(&local->chanctx_mtx);
 942
 943         if (!ifmgd->associated)
 944                 goto out;
 945
 946         if (!sdata->vif.csa_active)
 947                 goto out;
 948
 949         /*
 950          * using reservation isn't immediate as it may be deferred until later
 951          * with multi-vif. once reservation is complete it will re-schedule the
 952          * work with no reserved_chanctx so verify chandef to check if it
 953          * completed successfully
 954          */
 955
 956         if (sdata->reserved_chanctx) {
 957                 /*
 958                  * with multi-vif csa driver may call ieee80211_csa_finish()
 959                  * many times while waiting for other interfaces to use their
 960                  * reservations
 961                  */
 962                 if (sdata->reserved_ready)
 963                         goto out;
 964
 965                 ret = ieee80211_vif_use_reserved_context(sdata);
 966                 if (ret) {
 967                         sdata_info(sdata,
 968                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
 969                                    ret);
 970                         ieee80211_queue_work(&sdata->local->hw,
 971                                              &ifmgd->csa_connection_drop_work);
 972                         goto out;
 973                 }
 974
 975                 goto out;
 976         }
 977
 978         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
 979                                         &sdata->csa_chandef)) {
 980                 sdata_info(sdata,
 981                            "failed to finalize channel switch, disconnecting\n");
 982                 ieee80211_queue_work(&sdata->local->hw,
 983                                      &ifmgd->csa_connection_drop_work);
 984                 goto out;
 985         }
 986
 987         /* XXX: shouldn't really modify cfg80211-owned data! */
 988         ifmgd->associated->channel = sdata->csa_chandef.chan;
 989
 990         sdata->vif.csa_active = false;
 991
 992         /* XXX: wait for a beacon first? */
 993         if (sdata->csa_block_tx) {
 994                 ieee80211_wake_vif_queues(local, sdata,
 995                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 996                 sdata->csa_block_tx = false;
 997         }
 998
 999         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1000
1001         ieee80211_sta_reset_beacon_monitor(sdata);
1002         ieee80211_sta_reset_conn_monitor(sdata);
1003
1004 out:
1005         mutex_unlock(&local->chanctx_mtx);
1006         mutex_unlock(&local->mtx);
1007         sdata_unlock(sdata);
1008 }
1009
1010 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1011 {
1012         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1013         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1014
1015         trace_api_chswitch_done(sdata, success);
1016         if (!success) {
1017                 sdata_info(sdata,
1018                            "driver channel switch failed, disconnecting\n");
1019                 ieee80211_queue_work(&sdata->local->hw,
1020                                      &ifmgd->csa_connection_drop_work);
1021         } else {
1022                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1023         }
1024 }
1025 EXPORT_SYMBOL(ieee80211_chswitch_done);
1026
1027 static void ieee80211_chswitch_timer(unsigned long data)
1028 {
1029         struct ieee80211_sub_if_data *sdata =
1030                 (struct ieee80211_sub_if_data *) data;
1031
1032         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1033 }
1034
1035 static void
1036 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1037                                  u64 timestamp, struct ieee802_11_elems *elems,
1038                                  bool beacon)
1039 {
1040         struct ieee80211_local *local = sdata->local;
1041         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1042         struct cfg80211_bss *cbss = ifmgd->associated;
1043         struct ieee80211_chanctx_conf *conf;
1044         struct ieee80211_chanctx *chanctx;
1045         enum ieee80211_band current_band;
1046         struct ieee80211_csa_ie csa_ie;
1047         int res;
1048
1049         sdata_assert_lock(sdata);
1050
1051         if (!cbss)
1052                 return;
1053
1054         if (local->scanning)
1055                 return;
1056
1057         /* disregard subsequent announcements if we are already processing */
1058         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1059                 return;
1060
1061         current_band = cbss->channel->band;
1062         memset(&csa_ie, 0, sizeof(csa_ie));
1063         res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1064                                            ifmgd->flags,
1065                                            ifmgd->associated->bssid, &csa_ie);
1066         if (res < 0)
1067                 ieee80211_queue_work(&local->hw,
1068                                      &ifmgd->csa_connection_drop_work);
1069         if (res)
1070                 return;
1071
1072         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1073                                      IEEE80211_CHAN_DISABLED)) {
1074                 sdata_info(sdata,
1075                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1076                            ifmgd->associated->bssid,
1077                            csa_ie.chandef.chan->center_freq,
1078                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1079                            csa_ie.chandef.center_freq2);
1080                 ieee80211_queue_work(&local->hw,
1081                                      &ifmgd->csa_connection_drop_work);
1082                 return;
1083         }
1084
1085         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1086
1087         mutex_lock(&local->mtx);
1088         mutex_lock(&local->chanctx_mtx);
1089         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1090                                          lockdep_is_held(&local->chanctx_mtx));
1091         if (!conf) {
1092                 sdata_info(sdata,
1093                            "no channel context assigned to vif?, disconnecting\n");
1094                 ieee80211_queue_work(&local->hw,
1095                                      &ifmgd->csa_connection_drop_work);
1096                 mutex_unlock(&local->chanctx_mtx);
1097                 mutex_unlock(&local->mtx);
1098                 return;
1099         }
1100
1101         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1102
1103         if (local->use_chanctx) {
1104                 u32 num_chanctx = 0;
1105                 list_for_each_entry(chanctx, &local->chanctx_list, list)
1106                        num_chanctx++;
1107
1108                 if (num_chanctx > 1 ||
1109                     !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1110                         sdata_info(sdata,
1111                                    "not handling chan-switch with channel contexts\n");
1112                         ieee80211_queue_work(&local->hw,
1113                                              &ifmgd->csa_connection_drop_work);
1114                         mutex_unlock(&local->chanctx_mtx);
1115                         mutex_unlock(&local->mtx);
1116                         return;
1117                 }
1118         }
1119
1120         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1121                                             chanctx->mode, false);
1122         if (res) {
1123                 sdata_info(sdata,
1124                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1125                            res);
1126                 ieee80211_queue_work(&local->hw,
1127                                      &ifmgd->csa_connection_drop_work);
1128                 mutex_unlock(&local->chanctx_mtx);
1129                 mutex_unlock(&local->mtx);
1130                 return;
1131         }
1132         mutex_unlock(&local->chanctx_mtx);
1133
1134         sdata->vif.csa_active = true;
1135         sdata->csa_chandef = csa_ie.chandef;
1136         sdata->csa_block_tx = csa_ie.mode;
1137
1138         if (sdata->csa_block_tx)
1139                 ieee80211_stop_vif_queues(local, sdata,
1140                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1141         mutex_unlock(&local->mtx);
1142
1143         if (local->ops->channel_switch) {
1144                 /* use driver's channel switch callback */
1145                 struct ieee80211_channel_switch ch_switch = {
1146                         .timestamp = timestamp,
1147                         .block_tx = csa_ie.mode,
1148                         .chandef = csa_ie.chandef,
1149                         .count = csa_ie.count,
1150                 };
1151
1152                 drv_channel_switch(local, &ch_switch);
1153                 return;
1154         }
1155
1156         /* channel switch handled in software */
1157         if (csa_ie.count <= 1)
1158                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1159         else
1160                 mod_timer(&ifmgd->chswitch_timer,
1161                           TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1162 }
1163
1164 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1165                                        struct ieee80211_channel *channel,
1166                                        const u8 *country_ie, u8 country_ie_len,
1167                                        const u8 *pwr_constr_elem)
1168 {
1169         struct ieee80211_country_ie_triplet *triplet;
1170         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1171         int i, chan_pwr, chan_increment, new_ap_level;
1172         bool have_chan_pwr = false;
1173
1174         /* Invalid IE */
1175         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1176                 return 0;
1177
1178         triplet = (void *)(country_ie + 3);
1179         country_ie_len -= 3;
1180
1181         switch (channel->band) {
1182         default:
1183                 WARN_ON_ONCE(1);
1184                 /* fall through */
1185         case IEEE80211_BAND_2GHZ:
1186         case IEEE80211_BAND_60GHZ:
1187                 chan_increment = 1;
1188                 break;
1189         case IEEE80211_BAND_5GHZ:
1190                 chan_increment = 4;
1191                 break;
1192         }
1193
1194         /* find channel */
1195         while (country_ie_len >= 3) {
1196                 u8 first_channel = triplet->chans.first_channel;
1197
1198                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1199                         goto next;
1200
1201                 for (i = 0; i < triplet->chans.num_channels; i++) {
1202                         if (first_channel + i * chan_increment == chan) {
1203                                 have_chan_pwr = true;
1204                                 chan_pwr = triplet->chans.max_power;
1205                                 break;
1206                         }
1207                 }
1208                 if (have_chan_pwr)
1209                         break;
1210
1211  next:
1212                 triplet++;
1213                 country_ie_len -= 3;
1214         }
1215
1216         if (!have_chan_pwr)
1217                 return 0;
1218
1219         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1220
1221         if (sdata->ap_power_level == new_ap_level)
1222                 return 0;
1223
1224         sdata_info(sdata,
1225                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1226                    new_ap_level, chan_pwr, *pwr_constr_elem,
1227                    sdata->u.mgd.bssid);
1228         sdata->ap_power_level = new_ap_level;
1229         if (__ieee80211_recalc_txpower(sdata))
1230                 return BSS_CHANGED_TXPOWER;
1231         return 0;
1232 }
1233
1234 /* powersave */
1235 static void ieee80211_enable_ps(struct ieee80211_local *local,
1236                                 struct ieee80211_sub_if_data *sdata)
1237 {
1238         struct ieee80211_conf *conf = &local->hw.conf;
1239
1240         /*
1241          * If we are scanning right now then the parameters will
1242          * take effect when scan finishes.
1243          */
1244         if (local->scanning)
1245                 return;
1246
1247         if (conf->dynamic_ps_timeout > 0 &&
1248             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1249                 mod_timer(&local->dynamic_ps_timer, jiffies +
1250                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1251         } else {
1252                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1253                         ieee80211_send_nullfunc(local, sdata, 1);
1254
1255                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1256                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1257                         return;
1258
1259                 conf->flags |= IEEE80211_CONF_PS;
1260                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1261         }
1262 }
1263
1264 static void ieee80211_change_ps(struct ieee80211_local *local)
1265 {
1266         struct ieee80211_conf *conf = &local->hw.conf;
1267
1268         if (local->ps_sdata) {
1269                 ieee80211_enable_ps(local, local->ps_sdata);
1270         } else if (conf->flags & IEEE80211_CONF_PS) {
1271                 conf->flags &= ~IEEE80211_CONF_PS;
1272                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1273                 del_timer_sync(&local->dynamic_ps_timer);
1274                 cancel_work_sync(&local->dynamic_ps_enable_work);
1275         }
1276 }
1277
1278 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1279 {
1280         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1281         struct sta_info *sta = NULL;
1282         bool authorized = false;
1283
1284         if (!mgd->powersave)
1285                 return false;
1286
1287         if (mgd->broken_ap)
1288                 return false;
1289
1290         if (!mgd->associated)
1291                 return false;
1292
1293         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1294                 return false;
1295
1296         if (!mgd->have_beacon)
1297                 return false;
1298
1299         rcu_read_lock();
1300         sta = sta_info_get(sdata, mgd->bssid);
1301         if (sta)
1302                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1303         rcu_read_unlock();
1304
1305         return authorized;
1306 }
1307
1308 /* need to hold RTNL or interface lock */
1309 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1310 {
1311         struct ieee80211_sub_if_data *sdata, *found = NULL;
1312         int count = 0;
1313         int timeout;
1314
1315         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1316                 local->ps_sdata = NULL;
1317                 return;
1318         }
1319
1320         list_for_each_entry(sdata, &local->interfaces, list) {
1321                 if (!ieee80211_sdata_running(sdata))
1322                         continue;
1323                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1324                         /* If an AP vif is found, then disable PS
1325                          * by setting the count to zero thereby setting
1326                          * ps_sdata to NULL.
1327                          */
1328                         count = 0;
1329                         break;
1330                 }
1331                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1332                         continue;
1333                 found = sdata;
1334                 count++;
1335         }
1336
1337         if (count == 1 && ieee80211_powersave_allowed(found)) {
1338                 s32 beaconint_us;
1339
1340                 if (latency < 0)
1341                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1342
1343                 beaconint_us = ieee80211_tu_to_usec(
1344                                         found->vif.bss_conf.beacon_int);
1345
1346                 timeout = local->dynamic_ps_forced_timeout;
1347                 if (timeout < 0) {
1348                         /*
1349                          * Go to full PSM if the user configures a very low
1350                          * latency requirement.
1351                          * The 2000 second value is there for compatibility
1352                          * until the PM_QOS_NETWORK_LATENCY is configured
1353                          * with real values.
1354                          */
1355                         if (latency > (1900 * USEC_PER_MSEC) &&
1356                             latency != (2000 * USEC_PER_SEC))
1357                                 timeout = 0;
1358                         else
1359                                 timeout = 100;
1360                 }
1361                 local->hw.conf.dynamic_ps_timeout = timeout;
1362
1363                 if (beaconint_us > latency) {
1364                         local->ps_sdata = NULL;
1365                 } else {
1366                         int maxslp = 1;
1367                         u8 dtimper = found->u.mgd.dtim_period;
1368
1369                         /* If the TIM IE is invalid, pretend the value is 1 */
1370                         if (!dtimper)
1371                                 dtimper = 1;
1372                         else if (dtimper > 1)
1373                                 maxslp = min_t(int, dtimper,
1374                                                     latency / beaconint_us);
1375
1376                         local->hw.conf.max_sleep_period = maxslp;
1377                         local->hw.conf.ps_dtim_period = dtimper;
1378                         local->ps_sdata = found;
1379                 }
1380         } else {
1381                 local->ps_sdata = NULL;
1382         }
1383
1384         ieee80211_change_ps(local);
1385 }
1386
1387 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1388 {
1389         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1390
1391         if (sdata->vif.bss_conf.ps != ps_allowed) {
1392                 sdata->vif.bss_conf.ps = ps_allowed;
1393                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1394         }
1395 }
1396
1397 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1398 {
1399         struct ieee80211_local *local =
1400                 container_of(work, struct ieee80211_local,
1401                              dynamic_ps_disable_work);
1402
1403         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1404                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1405                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1406         }
1407
1408         ieee80211_wake_queues_by_reason(&local->hw,
1409                                         IEEE80211_MAX_QUEUE_MAP,
1410                                         IEEE80211_QUEUE_STOP_REASON_PS,
1411                                         false);
1412 }
1413
1414 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1415 {
1416         struct ieee80211_local *local =
1417                 container_of(work, struct ieee80211_local,
1418                              dynamic_ps_enable_work);
1419         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1420         struct ieee80211_if_managed *ifmgd;
1421         unsigned long flags;
1422         int q;
1423
1424         /* can only happen when PS was just disabled anyway */
1425         if (!sdata)
1426                 return;
1427
1428         ifmgd = &sdata->u.mgd;
1429
1430         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1431                 return;
1432
1433         if (local->hw.conf.dynamic_ps_timeout > 0) {
1434                 /* don't enter PS if TX frames are pending */
1435                 if (drv_tx_frames_pending(local)) {
1436                         mod_timer(&local->dynamic_ps_timer, jiffies +
1437                                   msecs_to_jiffies(
1438                                   local->hw.conf.dynamic_ps_timeout));
1439                         return;
1440                 }
1441
1442                 /*
1443                  * transmission can be stopped by others which leads to
1444                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1445                  * is not the actual idle state.
1446                  */
1447                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1448                 for (q = 0; q < local->hw.queues; q++) {
1449                         if (local->queue_stop_reasons[q]) {
1450                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1451                                                        flags);
1452                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1453                                           msecs_to_jiffies(
1454                                           local->hw.conf.dynamic_ps_timeout));
1455                                 return;
1456                         }
1457                 }
1458                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1459         }
1460
1461         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1462             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1463                 if (drv_tx_frames_pending(local)) {
1464                         mod_timer(&local->dynamic_ps_timer, jiffies +
1465                                   msecs_to_jiffies(
1466                                   local->hw.conf.dynamic_ps_timeout));
1467                 } else {
1468                         ieee80211_send_nullfunc(local, sdata, 1);
1469                         /* Flush to get the tx status of nullfunc frame */
1470                         ieee80211_flush_queues(local, sdata);
1471                 }
1472         }
1473
1474         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1475               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1476             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1477                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1478                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1479                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1480         }
1481 }
1482
1483 void ieee80211_dynamic_ps_timer(unsigned long data)
1484 {
1485         struct ieee80211_local *local = (void *) data;
1486
1487         if (local->quiescing || local->suspended)
1488                 return;
1489
1490         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1491 }
1492
1493 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1494 {
1495         struct delayed_work *delayed_work =
1496                 container_of(work, struct delayed_work, work);
1497         struct ieee80211_sub_if_data *sdata =
1498                 container_of(delayed_work, struct ieee80211_sub_if_data,
1499                              dfs_cac_timer_work);
1500         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1501
1502         mutex_lock(&sdata->local->mtx);
1503         if (sdata->wdev.cac_started) {
1504                 ieee80211_vif_release_channel(sdata);
1505                 cfg80211_cac_event(sdata->dev, &chandef,
1506                                    NL80211_RADAR_CAC_FINISHED,
1507                                    GFP_KERNEL);
1508         }
1509         mutex_unlock(&sdata->local->mtx);
1510 }
1511
1512 /* MLME */
1513 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1514                                      struct ieee80211_sub_if_data *sdata,
1515                                      const u8 *wmm_param, size_t wmm_param_len)
1516 {
1517         struct ieee80211_tx_queue_params params;
1518         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1519         size_t left;
1520         int count;
1521         const u8 *pos;
1522         u8 uapsd_queues = 0;
1523
1524         if (!local->ops->conf_tx)
1525                 return false;
1526
1527         if (local->hw.queues < IEEE80211_NUM_ACS)
1528                 return false;
1529
1530         if (!wmm_param)
1531                 return false;
1532
1533         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1534                 return false;
1535
1536         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1537                 uapsd_queues = ifmgd->uapsd_queues;
1538
1539         count = wmm_param[6] & 0x0f;
1540         if (count == ifmgd->wmm_last_param_set)
1541                 return false;
1542         ifmgd->wmm_last_param_set = count;
1543
1544         pos = wmm_param + 8;
1545         left = wmm_param_len - 8;
1546
1547         memset(&params, 0, sizeof(params));
1548
1549         sdata->wmm_acm = 0;
1550         for (; left >= 4; left -= 4, pos += 4) {
1551                 int aci = (pos[0] >> 5) & 0x03;
1552                 int acm = (pos[0] >> 4) & 0x01;
1553                 bool uapsd = false;
1554                 int queue;
1555
1556                 switch (aci) {
1557                 case 1: /* AC_BK */
1558                         queue = 3;
1559                         if (acm)
1560                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1561                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1562                                 uapsd = true;
1563                         break;
1564                 case 2: /* AC_VI */
1565                         queue = 1;
1566                         if (acm)
1567                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1568                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1569                                 uapsd = true;
1570                         break;
1571                 case 3: /* AC_VO */
1572                         queue = 0;
1573                         if (acm)
1574                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1575                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1576                                 uapsd = true;
1577                         break;
1578                 case 0: /* AC_BE */
1579                 default:
1580                         queue = 2;
1581                         if (acm)
1582                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1583                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1584                                 uapsd = true;
1585                         break;
1586                 }
1587
1588                 params.aifs = pos[0] & 0x0f;
1589                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1590                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1591                 params.txop = get_unaligned_le16(pos + 2);
1592                 params.acm = acm;
1593                 params.uapsd = uapsd;
1594
1595                 mlme_dbg(sdata,
1596                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1597                          queue, aci, acm,
1598                          params.aifs, params.cw_min, params.cw_max,
1599                          params.txop, params.uapsd);
1600                 sdata->tx_conf[queue] = params;
1601                 if (drv_conf_tx(local, sdata, queue, &params))
1602                         sdata_err(sdata,
1603                                   "failed to set TX queue parameters for queue %d\n",
1604                                   queue);
1605         }
1606
1607         /* enable WMM or activate new settings */
1608         sdata->vif.bss_conf.qos = true;
1609         return true;
1610 }
1611
1612 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1613 {
1614         lockdep_assert_held(&sdata->local->mtx);
1615
1616         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1617         ieee80211_run_deferred_scan(sdata->local);
1618 }
1619
1620 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1621 {
1622         mutex_lock(&sdata->local->mtx);
1623         __ieee80211_stop_poll(sdata);
1624         mutex_unlock(&sdata->local->mtx);
1625 }
1626
1627 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1628                                            u16 capab, bool erp_valid, u8 erp)
1629 {
1630         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1631         u32 changed = 0;
1632         bool use_protection;
1633         bool use_short_preamble;
1634         bool use_short_slot;
1635
1636         if (erp_valid) {
1637                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1638                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1639         } else {
1640                 use_protection = false;
1641                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1642         }
1643
1644         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1645         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1646                 use_short_slot = true;
1647
1648         if (use_protection != bss_conf->use_cts_prot) {
1649                 bss_conf->use_cts_prot = use_protection;
1650                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1651         }
1652
1653         if (use_short_preamble != bss_conf->use_short_preamble) {
1654                 bss_conf->use_short_preamble = use_short_preamble;
1655                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1656         }
1657
1658         if (use_short_slot != bss_conf->use_short_slot) {
1659                 bss_conf->use_short_slot = use_short_slot;
1660                 changed |= BSS_CHANGED_ERP_SLOT;
1661         }
1662
1663         return changed;
1664 }
1665
1666 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1667                                      struct cfg80211_bss *cbss,
1668                                      u32 bss_info_changed)
1669 {
1670         struct ieee80211_bss *bss = (void *)cbss->priv;
1671         struct ieee80211_local *local = sdata->local;
1672         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1673
1674         bss_info_changed |= BSS_CHANGED_ASSOC;
1675         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1676                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1677
1678         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1679                 beacon_loss_count * bss_conf->beacon_int));
1680
1681         sdata->u.mgd.associated = cbss;
1682         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1683
1684         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1685
1686         if (sdata->vif.p2p) {
1687                 const struct cfg80211_bss_ies *ies;
1688
1689                 rcu_read_lock();
1690                 ies = rcu_dereference(cbss->ies);
1691                 if (ies) {
1692                         int ret;
1693
1694                         ret = cfg80211_get_p2p_attr(
1695                                         ies->data, ies->len,
1696                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1697                                         (u8 *) &bss_conf->p2p_noa_attr,
1698                                         sizeof(bss_conf->p2p_noa_attr));
1699                         if (ret >= 2) {
1700                                 sdata->u.mgd.p2p_noa_index =
1701                                         bss_conf->p2p_noa_attr.index;
1702                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1703                         }
1704                 }
1705                 rcu_read_unlock();
1706         }
1707
1708         /* just to be sure */
1709         ieee80211_stop_poll(sdata);
1710
1711         ieee80211_led_assoc(local, 1);
1712
1713         if (sdata->u.mgd.have_beacon) {
1714                 /*
1715                  * If the AP is buggy we may get here with no DTIM period
1716                  * known, so assume it's 1 which is the only safe assumption
1717                  * in that case, although if the TIM IE is broken powersave
1718                  * probably just won't work at all.
1719                  */
1720                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1721                 bss_conf->beacon_rate = bss->beacon_rate;
1722                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1723         } else {
1724                 bss_conf->beacon_rate = NULL;
1725                 bss_conf->dtim_period = 0;
1726         }
1727
1728         bss_conf->assoc = 1;
1729
1730         /* Tell the driver to monitor connection quality (if supported) */
1731         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1732             bss_conf->cqm_rssi_thold)
1733                 bss_info_changed |= BSS_CHANGED_CQM;
1734
1735         /* Enable ARP filtering */
1736         if (bss_conf->arp_addr_cnt)
1737                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1738
1739         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1740
1741         mutex_lock(&local->iflist_mtx);
1742         ieee80211_recalc_ps(local, -1);
1743         mutex_unlock(&local->iflist_mtx);
1744
1745         ieee80211_recalc_smps(sdata);
1746         ieee80211_recalc_ps_vif(sdata);
1747
1748         netif_carrier_on(sdata->dev);
1749 }
1750
1751 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1752                                    u16 stype, u16 reason, bool tx,
1753                                    u8 *frame_buf)
1754 {
1755         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1756         struct ieee80211_local *local = sdata->local;
1757         u32 changed = 0;
1758
1759         sdata_assert_lock(sdata);
1760
1761         if (WARN_ON_ONCE(tx && !frame_buf))
1762                 return;
1763
1764         if (WARN_ON(!ifmgd->associated))
1765                 return;
1766
1767         ieee80211_stop_poll(sdata);
1768
1769         ifmgd->associated = NULL;
1770         netif_carrier_off(sdata->dev);
1771
1772         /*
1773          * if we want to get out of ps before disassoc (why?) we have
1774          * to do it before sending disassoc, as otherwise the null-packet
1775          * won't be valid.
1776          */
1777         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1778                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1779                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1780         }
1781         local->ps_sdata = NULL;
1782
1783         /* disable per-vif ps */
1784         ieee80211_recalc_ps_vif(sdata);
1785
1786         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1787         if (tx)
1788                 ieee80211_flush_queues(local, sdata);
1789
1790         /* deauthenticate/disassociate now */
1791         if (tx || frame_buf)
1792                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1793                                                reason, tx, frame_buf);
1794
1795         /* flush out frame */
1796         if (tx)
1797                 ieee80211_flush_queues(local, sdata);
1798
1799         /* clear bssid only after building the needed mgmt frames */
1800         memset(ifmgd->bssid, 0, ETH_ALEN);
1801
1802         /* remove AP and TDLS peers */
1803         sta_info_flush(sdata);
1804
1805         /* finally reset all BSS / config parameters */
1806         changed |= ieee80211_reset_erp_info(sdata);
1807
1808         ieee80211_led_assoc(local, 0);
1809         changed |= BSS_CHANGED_ASSOC;
1810         sdata->vif.bss_conf.assoc = false;
1811
1812         ifmgd->p2p_noa_index = -1;
1813         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1814                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1815
1816         /* on the next assoc, re-program HT/VHT parameters */
1817         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1818         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1819         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1820         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1821
1822         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1823
1824         del_timer_sync(&local->dynamic_ps_timer);
1825         cancel_work_sync(&local->dynamic_ps_enable_work);
1826
1827         /* Disable ARP filtering */
1828         if (sdata->vif.bss_conf.arp_addr_cnt)
1829                 changed |= BSS_CHANGED_ARP_FILTER;
1830
1831         sdata->vif.bss_conf.qos = false;
1832         changed |= BSS_CHANGED_QOS;
1833
1834         /* The BSSID (not really interesting) and HT changed */
1835         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1836         ieee80211_bss_info_change_notify(sdata, changed);
1837
1838         /* disassociated - set to defaults now */
1839         ieee80211_set_wmm_default(sdata, false);
1840
1841         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1842         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1843         del_timer_sync(&sdata->u.mgd.timer);
1844         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1845
1846         sdata->vif.bss_conf.dtim_period = 0;
1847         sdata->vif.bss_conf.beacon_rate = NULL;
1848
1849         ifmgd->have_beacon = false;
1850
1851         ifmgd->flags = 0;
1852         mutex_lock(&local->mtx);
1853         ieee80211_vif_release_channel(sdata);
1854
1855         sdata->vif.csa_active = false;
1856         if (sdata->csa_block_tx) {
1857                 ieee80211_wake_vif_queues(local, sdata,
1858                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1859                 sdata->csa_block_tx = false;
1860         }
1861         mutex_unlock(&local->mtx);
1862
1863         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1864 }
1865
1866 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1867                              struct ieee80211_hdr *hdr)
1868 {
1869         /*
1870          * We can postpone the mgd.timer whenever receiving unicast frames
1871          * from AP because we know that the connection is working both ways
1872          * at that time. But multicast frames (and hence also beacons) must
1873          * be ignored here, because we need to trigger the timer during
1874          * data idle periods for sending the periodic probe request to the
1875          * AP we're connected to.
1876          */
1877         if (is_multicast_ether_addr(hdr->addr1))
1878                 return;
1879
1880         ieee80211_sta_reset_conn_monitor(sdata);
1881 }
1882
1883 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1884 {
1885         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1886         struct ieee80211_local *local = sdata->local;
1887
1888         mutex_lock(&local->mtx);
1889         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1890                 goto out;
1891
1892         __ieee80211_stop_poll(sdata);
1893
1894         mutex_lock(&local->iflist_mtx);
1895         ieee80211_recalc_ps(local, -1);
1896         mutex_unlock(&local->iflist_mtx);
1897
1898         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1899                 goto out;
1900
1901         /*
1902          * We've received a probe response, but are not sure whether
1903          * we have or will be receiving any beacons or data, so let's
1904          * schedule the timers again, just in case.
1905          */
1906         ieee80211_sta_reset_beacon_monitor(sdata);
1907
1908         mod_timer(&ifmgd->conn_mon_timer,
1909                   round_jiffies_up(jiffies +
1910                                    IEEE80211_CONNECTION_IDLE_TIME));
1911 out:
1912         mutex_unlock(&local->mtx);
1913 }
1914
1915 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1916                              struct ieee80211_hdr *hdr, bool ack)
1917 {
1918         if (!ieee80211_is_data(hdr->frame_control))
1919             return;
1920
1921         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1922             sdata->u.mgd.probe_send_count > 0) {
1923                 if (ack)
1924                         ieee80211_sta_reset_conn_monitor(sdata);
1925                 else
1926                         sdata->u.mgd.nullfunc_failed = true;
1927                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1928                 return;
1929         }
1930
1931         if (ack)
1932                 ieee80211_sta_reset_conn_monitor(sdata);
1933 }
1934
1935 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1936 {
1937         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1938         const u8 *ssid;
1939         u8 *dst = ifmgd->associated->bssid;
1940         u8 unicast_limit = max(1, max_probe_tries - 3);
1941
1942         /*
1943          * Try sending broadcast probe requests for the last three
1944          * probe requests after the first ones failed since some
1945          * buggy APs only support broadcast probe requests.
1946          */
1947         if (ifmgd->probe_send_count >= unicast_limit)
1948                 dst = NULL;
1949
1950         /*
1951          * When the hardware reports an accurate Tx ACK status, it's
1952          * better to send a nullfunc frame instead of a probe request,
1953          * as it will kick us off the AP quickly if we aren't associated
1954          * anymore. The timeout will be reset if the frame is ACKed by
1955          * the AP.
1956          */
1957         ifmgd->probe_send_count++;
1958
1959         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1960                 ifmgd->nullfunc_failed = false;
1961                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1962         } else {
1963                 int ssid_len;
1964
1965                 rcu_read_lock();
1966                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1967                 if (WARN_ON_ONCE(ssid == NULL))
1968                         ssid_len = 0;
1969                 else
1970                         ssid_len = ssid[1];
1971
1972                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1973                                          0, (u32) -1, true, 0,
1974                                          ifmgd->associated->channel, false);
1975                 rcu_read_unlock();
1976         }
1977
1978         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1979         run_again(sdata, ifmgd->probe_timeout);
1980         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1981                 ieee80211_flush_queues(sdata->local, sdata);
1982 }
1983
1984 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1985                                    bool beacon)
1986 {
1987         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1988         bool already = false;
1989
1990         if (!ieee80211_sdata_running(sdata))
1991                 return;
1992
1993         sdata_lock(sdata);
1994
1995         if (!ifmgd->associated)
1996                 goto out;
1997
1998         mutex_lock(&sdata->local->mtx);
1999
2000         if (sdata->local->tmp_channel || sdata->local->scanning) {
2001                 mutex_unlock(&sdata->local->mtx);
2002                 goto out;
2003         }
2004
2005         if (beacon) {
2006                 mlme_dbg_ratelimited(sdata,
2007                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2008                                      beacon_loss_count);
2009
2010                 ieee80211_cqm_rssi_notify(&sdata->vif,
2011                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2012                                           GFP_KERNEL);
2013         }
2014
2015         /*
2016          * The driver/our work has already reported this event or the
2017          * connection monitoring has kicked in and we have already sent
2018          * a probe request. Or maybe the AP died and the driver keeps
2019          * reporting until we disassociate...
2020          *
2021          * In either case we have to ignore the current call to this
2022          * function (except for setting the correct probe reason bit)
2023          * because otherwise we would reset the timer every time and
2024          * never check whether we received a probe response!
2025          */
2026         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2027                 already = true;
2028
2029         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2030
2031         mutex_unlock(&sdata->local->mtx);
2032
2033         if (already)
2034                 goto out;
2035
2036         mutex_lock(&sdata->local->iflist_mtx);
2037         ieee80211_recalc_ps(sdata->local, -1);
2038         mutex_unlock(&sdata->local->iflist_mtx);
2039
2040         ifmgd->probe_send_count = 0;
2041         ieee80211_mgd_probe_ap_send(sdata);
2042  out:
2043         sdata_unlock(sdata);
2044 }
2045
2046 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2047                                           struct ieee80211_vif *vif)
2048 {
2049         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2050         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2051         struct cfg80211_bss *cbss;
2052         struct sk_buff *skb;
2053         const u8 *ssid;
2054         int ssid_len;
2055
2056         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2057                 return NULL;
2058
2059         sdata_assert_lock(sdata);
2060
2061         if (ifmgd->associated)
2062                 cbss = ifmgd->associated;
2063         else if (ifmgd->auth_data)
2064                 cbss = ifmgd->auth_data->bss;
2065         else if (ifmgd->assoc_data)
2066                 cbss = ifmgd->assoc_data->bss;
2067         else
2068                 return NULL;
2069
2070         rcu_read_lock();
2071         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2072         if (WARN_ON_ONCE(ssid == NULL))
2073                 ssid_len = 0;
2074         else
2075                 ssid_len = ssid[1];
2076
2077         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2078                                         (u32) -1, cbss->channel,
2079                                         ssid + 2, ssid_len,
2080                                         NULL, 0, true);
2081         rcu_read_unlock();
2082
2083         return skb;
2084 }
2085 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2086
2087 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2088 {
2089         struct ieee80211_local *local = sdata->local;
2090         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2091         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2092
2093         sdata_lock(sdata);
2094         if (!ifmgd->associated) {
2095                 sdata_unlock(sdata);
2096                 return;
2097         }
2098
2099         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2100                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2101                                true, frame_buf);
2102         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2103
2104         mutex_lock(&local->mtx);
2105         sdata->vif.csa_active = false;
2106         if (sdata->csa_block_tx) {
2107                 ieee80211_wake_vif_queues(local, sdata,
2108                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2109                 sdata->csa_block_tx = false;
2110         }
2111         mutex_unlock(&local->mtx);
2112
2113         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2114                               IEEE80211_DEAUTH_FRAME_LEN);
2115         sdata_unlock(sdata);
2116 }
2117
2118 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2119 {
2120         struct ieee80211_sub_if_data *sdata =
2121                 container_of(work, struct ieee80211_sub_if_data,
2122                              u.mgd.beacon_connection_loss_work);
2123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2124         struct sta_info *sta;
2125
2126         if (ifmgd->associated) {
2127                 rcu_read_lock();
2128                 sta = sta_info_get(sdata, ifmgd->bssid);
2129                 if (sta)
2130                         sta->beacon_loss_count++;
2131                 rcu_read_unlock();
2132         }
2133
2134         if (ifmgd->connection_loss) {
2135                 sdata_info(sdata, "Connection to AP %pM lost\n",
2136                            ifmgd->bssid);
2137                 __ieee80211_disconnect(sdata);
2138         } else {
2139                 ieee80211_mgd_probe_ap(sdata, true);
2140         }
2141 }
2142
2143 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2144 {
2145         struct ieee80211_sub_if_data *sdata =
2146                 container_of(work, struct ieee80211_sub_if_data,
2147                              u.mgd.csa_connection_drop_work);
2148
2149         __ieee80211_disconnect(sdata);
2150 }
2151
2152 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2153 {
2154         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2155         struct ieee80211_hw *hw = &sdata->local->hw;
2156
2157         trace_api_beacon_loss(sdata);
2158
2159         sdata->u.mgd.connection_loss = false;
2160         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2161 }
2162 EXPORT_SYMBOL(ieee80211_beacon_loss);
2163
2164 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2165 {
2166         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2167         struct ieee80211_hw *hw = &sdata->local->hw;
2168
2169         trace_api_connection_loss(sdata);
2170
2171         sdata->u.mgd.connection_loss = true;
2172         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2173 }
2174 EXPORT_SYMBOL(ieee80211_connection_loss);
2175
2176
2177 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2178                                         bool assoc)
2179 {
2180         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2181
2182         sdata_assert_lock(sdata);
2183
2184         if (!assoc) {
2185                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2186
2187                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2188                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2189                 sdata->u.mgd.flags = 0;
2190                 mutex_lock(&sdata->local->mtx);
2191                 ieee80211_vif_release_channel(sdata);
2192                 mutex_unlock(&sdata->local->mtx);
2193         }
2194
2195         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2196         kfree(auth_data);
2197         sdata->u.mgd.auth_data = NULL;
2198 }
2199
2200 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2201                                      struct ieee80211_mgmt *mgmt, size_t len)
2202 {
2203         struct ieee80211_local *local = sdata->local;
2204         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2205         u8 *pos;
2206         struct ieee802_11_elems elems;
2207         u32 tx_flags = 0;
2208
2209         pos = mgmt->u.auth.variable;
2210         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2211         if (!elems.challenge)
2212                 return;
2213         auth_data->expected_transaction = 4;
2214         drv_mgd_prepare_tx(sdata->local, sdata);
2215         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2216                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2217                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2218         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2219                             elems.challenge - 2, elems.challenge_len + 2,
2220                             auth_data->bss->bssid, auth_data->bss->bssid,
2221                             auth_data->key, auth_data->key_len,
2222                             auth_data->key_idx, tx_flags);
2223 }
2224
2225 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2226                                    struct ieee80211_mgmt *mgmt, size_t len)
2227 {
2228         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229         u8 bssid[ETH_ALEN];
2230         u16 auth_alg, auth_transaction, status_code;
2231         struct sta_info *sta;
2232
2233         sdata_assert_lock(sdata);
2234
2235         if (len < 24 + 6)
2236                 return;
2237
2238         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2239                 return;
2240
2241         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2242
2243         if (!ether_addr_equal(bssid, mgmt->bssid))
2244                 return;
2245
2246         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2247         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2248         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2249
2250         if (auth_alg != ifmgd->auth_data->algorithm ||
2251             auth_transaction != ifmgd->auth_data->expected_transaction) {
2252                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2253                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2254                            auth_transaction,
2255                            ifmgd->auth_data->expected_transaction);
2256                 return;
2257         }
2258
2259         if (status_code != WLAN_STATUS_SUCCESS) {
2260                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2261                            mgmt->sa, status_code);
2262                 ieee80211_destroy_auth_data(sdata, false);
2263                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2264                 return;
2265         }
2266
2267         switch (ifmgd->auth_data->algorithm) {
2268         case WLAN_AUTH_OPEN:
2269         case WLAN_AUTH_LEAP:
2270         case WLAN_AUTH_FT:
2271         case WLAN_AUTH_SAE:
2272                 break;
2273         case WLAN_AUTH_SHARED_KEY:
2274                 if (ifmgd->auth_data->expected_transaction != 4) {
2275                         ieee80211_auth_challenge(sdata, mgmt, len);
2276                         /* need another frame */
2277                         return;
2278                 }
2279                 break;
2280         default:
2281                 WARN_ONCE(1, "invalid auth alg %d",
2282                           ifmgd->auth_data->algorithm);
2283                 return;
2284         }
2285
2286         sdata_info(sdata, "authenticated\n");
2287         ifmgd->auth_data->done = true;
2288         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2289         ifmgd->auth_data->timeout_started = true;
2290         run_again(sdata, ifmgd->auth_data->timeout);
2291
2292         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2293             ifmgd->auth_data->expected_transaction != 2) {
2294                 /*
2295                  * Report auth frame to user space for processing since another
2296                  * round of Authentication frames is still needed.
2297                  */
2298                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2299                 return;
2300         }
2301
2302         /* move station state to auth */
2303         mutex_lock(&sdata->local->sta_mtx);
2304         sta = sta_info_get(sdata, bssid);
2305         if (!sta) {
2306                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2307                 goto out_err;
2308         }
2309         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2310                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2311                 goto out_err;
2312         }
2313         mutex_unlock(&sdata->local->sta_mtx);
2314
2315         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2316         return;
2317  out_err:
2318         mutex_unlock(&sdata->local->sta_mtx);
2319         /* ignore frame -- wait for timeout */
2320 }
2321
2322 #define case_WLAN(type) \
2323         case WLAN_REASON_##type: return #type
2324
2325 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2326 {
2327         switch (reason_code) {
2328         case_WLAN(UNSPECIFIED);
2329         case_WLAN(PREV_AUTH_NOT_VALID);
2330         case_WLAN(DEAUTH_LEAVING);
2331         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2332         case_WLAN(DISASSOC_AP_BUSY);
2333         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2334         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2335         case_WLAN(DISASSOC_STA_HAS_LEFT);
2336         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2337         case_WLAN(DISASSOC_BAD_POWER);
2338         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2339         case_WLAN(INVALID_IE);
2340         case_WLAN(MIC_FAILURE);
2341         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2342         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2343         case_WLAN(IE_DIFFERENT);
2344         case_WLAN(INVALID_GROUP_CIPHER);
2345         case_WLAN(INVALID_PAIRWISE_CIPHER);
2346         case_WLAN(INVALID_AKMP);
2347         case_WLAN(UNSUPP_RSN_VERSION);
2348         case_WLAN(INVALID_RSN_IE_CAP);
2349         case_WLAN(IEEE8021X_FAILED);
2350         case_WLAN(CIPHER_SUITE_REJECTED);
2351         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2352         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2353         case_WLAN(DISASSOC_LOW_ACK);
2354         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2355         case_WLAN(QSTA_LEAVE_QBSS);
2356         case_WLAN(QSTA_NOT_USE);
2357         case_WLAN(QSTA_REQUIRE_SETUP);
2358         case_WLAN(QSTA_TIMEOUT);
2359         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2360         case_WLAN(MESH_PEER_CANCELED);
2361         case_WLAN(MESH_MAX_PEERS);
2362         case_WLAN(MESH_CONFIG);
2363         case_WLAN(MESH_CLOSE);
2364         case_WLAN(MESH_MAX_RETRIES);
2365         case_WLAN(MESH_CONFIRM_TIMEOUT);
2366         case_WLAN(MESH_INVALID_GTK);
2367         case_WLAN(MESH_INCONSISTENT_PARAM);
2368         case_WLAN(MESH_INVALID_SECURITY);
2369         case_WLAN(MESH_PATH_ERROR);
2370         case_WLAN(MESH_PATH_NOFORWARD);
2371         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2372         case_WLAN(MAC_EXISTS_IN_MBSS);
2373         case_WLAN(MESH_CHAN_REGULATORY);
2374         case_WLAN(MESH_CHAN);
2375         default: return "<unknown>";
2376         }
2377 }
2378
2379 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2380                                      struct ieee80211_mgmt *mgmt, size_t len)
2381 {
2382         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2383         const u8 *bssid = NULL;
2384         u16 reason_code;
2385
2386         sdata_assert_lock(sdata);
2387
2388         if (len < 24 + 2)
2389                 return;
2390
2391         if (!ifmgd->associated ||
2392             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2393                 return;
2394
2395         bssid = ifmgd->associated->bssid;
2396
2397         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2398
2399         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2400                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2401
2402         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2403
2404         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2405 }
2406
2407
2408 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2409                                        struct ieee80211_mgmt *mgmt, size_t len)
2410 {
2411         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2412         u16 reason_code;
2413
2414         sdata_assert_lock(sdata);
2415
2416         if (len < 24 + 2)
2417                 return;
2418
2419         if (!ifmgd->associated ||
2420             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2421                 return;
2422
2423         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2424
2425         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2426                    mgmt->sa, reason_code);
2427
2428         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2429
2430         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2431 }
2432
2433 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2434                                 u8 *supp_rates, unsigned int supp_rates_len,
2435                                 u32 *rates, u32 *basic_rates,
2436                                 bool *have_higher_than_11mbit,
2437                                 int *min_rate, int *min_rate_index,
2438                                 int shift, u32 rate_flags)
2439 {
2440         int i, j;
2441
2442         for (i = 0; i < supp_rates_len; i++) {
2443                 int rate = supp_rates[i] & 0x7f;
2444                 bool is_basic = !!(supp_rates[i] & 0x80);
2445
2446                 if ((rate * 5 * (1 << shift)) > 110)
2447                         *have_higher_than_11mbit = true;
2448
2449                 /*
2450                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2451                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2452                  *
2453                  * Note: Even through the membership selector and the basic
2454                  *       rate flag share the same bit, they are not exactly
2455                  *       the same.
2456                  */
2457                 if (!!(supp_rates[i] & 0x80) &&
2458                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2459                         continue;
2460
2461                 for (j = 0; j < sband->n_bitrates; j++) {
2462                         struct ieee80211_rate *br;
2463                         int brate;
2464
2465                         br = &sband->bitrates[j];
2466                         if ((rate_flags & br->flags) != rate_flags)
2467                                 continue;
2468
2469                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2470                         if (brate == rate) {
2471                                 *rates |= BIT(j);
2472                                 if (is_basic)
2473                                         *basic_rates |= BIT(j);
2474                                 if ((rate * 5) < *min_rate) {
2475                                         *min_rate = rate * 5;
2476                                         *min_rate_index = j;
2477                                 }
2478                                 break;
2479                         }
2480                 }
2481         }
2482 }
2483
2484 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2485                                          bool assoc)
2486 {
2487         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2488
2489         sdata_assert_lock(sdata);
2490
2491         if (!assoc) {
2492                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2493
2494                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2495                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2496                 sdata->u.mgd.flags = 0;
2497                 mutex_lock(&sdata->local->mtx);
2498                 ieee80211_vif_release_channel(sdata);
2499                 mutex_unlock(&sdata->local->mtx);
2500         }
2501
2502         kfree(assoc_data);
2503         sdata->u.mgd.assoc_data = NULL;
2504 }
2505
2506 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2507                                     struct cfg80211_bss *cbss,
2508                                     struct ieee80211_mgmt *mgmt, size_t len)
2509 {
2510         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2511         struct ieee80211_local *local = sdata->local;
2512         struct ieee80211_supported_band *sband;
2513         struct sta_info *sta;
2514         u8 *pos;
2515         u16 capab_info, aid;
2516         struct ieee802_11_elems elems;
2517         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2518         const struct cfg80211_bss_ies *bss_ies = NULL;
2519         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2520         u32 changed = 0;
2521         int err;
2522         bool ret;
2523
2524         /* AssocResp and ReassocResp have identical structure */
2525
2526         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2527         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2528
2529         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2530                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2531                            aid);
2532         aid &= ~(BIT(15) | BIT(14));
2533
2534         ifmgd->broken_ap = false;
2535
2536         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2537                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2538                            aid);
2539                 aid = 0;
2540                 ifmgd->broken_ap = true;
2541         }
2542
2543         pos = mgmt->u.assoc_resp.variable;
2544         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2545
2546         if (!elems.supp_rates) {
2547                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2548                 return false;
2549         }
2550
2551         ifmgd->aid = aid;
2552
2553         /*
2554          * Some APs are erroneously not including some information in their
2555          * (re)association response frames. Try to recover by using the data
2556          * from the beacon or probe response. This seems to afflict mobile
2557          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2558          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2559          */
2560         if ((assoc_data->wmm && !elems.wmm_param) ||
2561             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2562              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2563             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2564              (!elems.vht_cap_elem || !elems.vht_operation))) {
2565                 const struct cfg80211_bss_ies *ies;
2566                 struct ieee802_11_elems bss_elems;
2567
2568                 rcu_read_lock();
2569                 ies = rcu_dereference(cbss->ies);
2570                 if (ies)
2571                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2572                                           GFP_ATOMIC);
2573                 rcu_read_unlock();
2574                 if (!bss_ies)
2575                         return false;
2576
2577                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2578                                        false, &bss_elems);
2579                 if (assoc_data->wmm &&
2580                     !elems.wmm_param && bss_elems.wmm_param) {
2581                         elems.wmm_param = bss_elems.wmm_param;
2582                         sdata_info(sdata,
2583                                    "AP bug: WMM param missing from AssocResp\n");
2584                 }
2585
2586                 /*
2587                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2588                  * have to include the IEs in the (re)association response.
2589                  */
2590                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2591                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2592                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2593                         sdata_info(sdata,
2594                                    "AP bug: HT capability missing from AssocResp\n");
2595                 }
2596                 if (!elems.ht_operation && bss_elems.ht_operation &&
2597                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2598                         elems.ht_operation = bss_elems.ht_operation;
2599                         sdata_info(sdata,
2600                                    "AP bug: HT operation missing from AssocResp\n");
2601                 }
2602                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2603                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2604                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2605                         sdata_info(sdata,
2606                                    "AP bug: VHT capa missing from AssocResp\n");
2607                 }
2608                 if (!elems.vht_operation && bss_elems.vht_operation &&
2609                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2610                         elems.vht_operation = bss_elems.vht_operation;
2611                         sdata_info(sdata,
2612                                    "AP bug: VHT operation missing from AssocResp\n");
2613                 }
2614         }
2615
2616         /*
2617          * We previously checked these in the beacon/probe response, so
2618          * they should be present here. This is just a safety net.
2619          */
2620         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2621             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2622                 sdata_info(sdata,
2623                            "HT AP is missing WMM params or HT capability/operation\n");
2624                 ret = false;
2625                 goto out;
2626         }
2627
2628         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2629             (!elems.vht_cap_elem || !elems.vht_operation)) {
2630                 sdata_info(sdata,
2631                            "VHT AP is missing VHT capability/operation\n");
2632                 ret = false;
2633                 goto out;
2634         }
2635
2636         mutex_lock(&sdata->local->sta_mtx);
2637         /*
2638          * station info was already allocated and inserted before
2639          * the association and should be available to us
2640          */
2641         sta = sta_info_get(sdata, cbss->bssid);
2642         if (WARN_ON(!sta)) {
2643                 mutex_unlock(&sdata->local->sta_mtx);
2644                 ret = false;
2645                 goto out;
2646         }
2647
2648         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2649
2650         /* Set up internal HT/VHT capabilities */
2651         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2652                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2653                                                   elems.ht_cap_elem, sta);
2654
2655         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2656                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2657                                                     elems.vht_cap_elem, sta);
2658
2659         /*
2660          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2661          * in their association response, so ignore that data for our own
2662          * configuration. If it changed since the last beacon, we'll get the
2663          * next beacon and update then.
2664          */
2665
2666         /*
2667          * If an operating mode notification IE is present, override the
2668          * NSS calculation (that would be done in rate_control_rate_init())
2669          * and use the # of streams from that element.
2670          */
2671         if (elems.opmode_notif &&
2672             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2673                 u8 nss;
2674
2675                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2676                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2677                 nss += 1;
2678                 sta->sta.rx_nss = nss;
2679         }
2680
2681         rate_control_rate_init(sta);
2682
2683         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2684                 set_sta_flag(sta, WLAN_STA_MFP);
2685
2686         if (elems.wmm_param)
2687                 set_sta_flag(sta, WLAN_STA_WME);
2688
2689         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2690         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2691                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2692         if (err) {
2693                 sdata_info(sdata,
2694                            "failed to move station %pM to desired state\n",
2695                            sta->sta.addr);
2696                 WARN_ON(__sta_info_destroy(sta));
2697                 mutex_unlock(&sdata->local->sta_mtx);
2698                 ret = false;
2699                 goto out;
2700         }
2701
2702         mutex_unlock(&sdata->local->sta_mtx);
2703
2704         /*
2705          * Always handle WMM once after association regardless
2706          * of the first value the AP uses. Setting -1 here has
2707          * that effect because the AP values is an unsigned
2708          * 4-bit value.
2709          */
2710         ifmgd->wmm_last_param_set = -1;
2711
2712         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2713                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2714                                          elems.wmm_param_len);
2715         else
2716                 ieee80211_set_wmm_default(sdata, false);
2717         changed |= BSS_CHANGED_QOS;
2718
2719         /* set AID and assoc capability,
2720          * ieee80211_set_associated() will tell the driver */
2721         bss_conf->aid = aid;
2722         bss_conf->assoc_capability = capab_info;
2723         ieee80211_set_associated(sdata, cbss, changed);
2724
2725         /*
2726          * If we're using 4-addr mode, let the AP know that we're
2727          * doing so, so that it can create the STA VLAN on its side
2728          */
2729         if (ifmgd->use_4addr)
2730                 ieee80211_send_4addr_nullfunc(local, sdata);
2731
2732         /*
2733          * Start timer to probe the connection to the AP now.
2734          * Also start the timer that will detect beacon loss.
2735          */
2736         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2737         ieee80211_sta_reset_beacon_monitor(sdata);
2738
2739         ret = true;
2740  out:
2741         kfree(bss_ies);
2742         return ret;
2743 }
2744
2745 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2746                                          struct ieee80211_mgmt *mgmt,
2747                                          size_t len)
2748 {
2749         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2750         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2751         u16 capab_info, status_code, aid;
2752         struct ieee802_11_elems elems;
2753         u8 *pos;
2754         bool reassoc;
2755         struct cfg80211_bss *bss;
2756
2757         sdata_assert_lock(sdata);
2758
2759         if (!assoc_data)
2760                 return;
2761         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2762                 return;
2763
2764         /*
2765          * AssocResp and ReassocResp have identical structure, so process both
2766          * of them in this function.
2767          */
2768
2769         if (len < 24 + 6)
2770                 return;
2771
2772         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2773         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2774         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2775         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2776
2777         sdata_info(sdata,
2778                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2779                    reassoc ? "Rea" : "A", mgmt->sa,
2780                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2781
2782         pos = mgmt->u.assoc_resp.variable;
2783         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2784
2785         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2786             elems.timeout_int &&
2787             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2788                 u32 tu, ms;
2789                 tu = le32_to_cpu(elems.timeout_int->value);
2790                 ms = tu * 1024 / 1000;
2791                 sdata_info(sdata,
2792                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2793                            mgmt->sa, tu, ms);
2794                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2795                 assoc_data->timeout_started = true;
2796                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2797                         run_again(sdata, assoc_data->timeout);
2798                 return;
2799         }
2800
2801         bss = assoc_data->bss;
2802
2803         if (status_code != WLAN_STATUS_SUCCESS) {
2804                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2805                            mgmt->sa, status_code);
2806                 ieee80211_destroy_assoc_data(sdata, false);
2807         } else {
2808                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2809                         /* oops -- internal error -- send timeout for now */
2810                         ieee80211_destroy_assoc_data(sdata, false);
2811                         cfg80211_assoc_timeout(sdata->dev, bss);
2812                         return;
2813                 }
2814                 sdata_info(sdata, "associated\n");
2815
2816                 /*
2817                  * destroy assoc_data afterwards, as otherwise an idle
2818                  * recalc after assoc_data is NULL but before associated
2819                  * is set can cause the interface to go idle
2820                  */
2821                 ieee80211_destroy_assoc_data(sdata, true);
2822         }
2823
2824         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2825 }
2826
2827 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2828                                   struct ieee80211_mgmt *mgmt, size_t len,
2829                                   struct ieee80211_rx_status *rx_status,
2830                                   struct ieee802_11_elems *elems)
2831 {
2832         struct ieee80211_local *local = sdata->local;
2833         struct ieee80211_bss *bss;
2834         struct ieee80211_channel *channel;
2835
2836         sdata_assert_lock(sdata);
2837
2838         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2839         if (!channel)
2840                 return;
2841
2842         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2843                                         channel);
2844         if (bss) {
2845                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2846                 ieee80211_rx_bss_put(local, bss);
2847         }
2848 }
2849
2850
2851 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2852                                          struct sk_buff *skb)
2853 {
2854         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2855         struct ieee80211_if_managed *ifmgd;
2856         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2857         size_t baselen, len = skb->len;
2858         struct ieee802_11_elems elems;
2859
2860         ifmgd = &sdata->u.mgd;
2861
2862         sdata_assert_lock(sdata);
2863
2864         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2865                 return; /* ignore ProbeResp to foreign address */
2866
2867         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2868         if (baselen > len)
2869                 return;
2870
2871         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2872                                false, &elems);
2873
2874         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2875
2876         if (ifmgd->associated &&
2877             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2878                 ieee80211_reset_ap_probe(sdata);
2879
2880         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2881             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2882                 /* got probe response, continue with auth */
2883                 sdata_info(sdata, "direct probe responded\n");
2884                 ifmgd->auth_data->tries = 0;
2885                 ifmgd->auth_data->timeout = jiffies;
2886                 ifmgd->auth_data->timeout_started = true;
2887                 run_again(sdata, ifmgd->auth_data->timeout);
2888         }
2889 }
2890
2891 /*
2892  * This is the canonical list of information elements we care about,
2893  * the filter code also gives us all changes to the Microsoft OUI
2894  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2895  *
2896  * We implement beacon filtering in software since that means we can
2897  * avoid processing the frame here and in cfg80211, and userspace
2898  * will not be able to tell whether the hardware supports it or not.
2899  *
2900  * XXX: This list needs to be dynamic -- userspace needs to be able to
2901  *      add items it requires. It also needs to be able to tell us to
2902  *      look out for other vendor IEs.
2903  */
2904 static const u64 care_about_ies =
2905         (1ULL << WLAN_EID_COUNTRY) |
2906         (1ULL << WLAN_EID_ERP_INFO) |
2907         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2908         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2909         (1ULL << WLAN_EID_HT_CAPABILITY) |
2910         (1ULL << WLAN_EID_HT_OPERATION);
2911
2912 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2913                                      struct ieee80211_mgmt *mgmt, size_t len,
2914                                      struct ieee80211_rx_status *rx_status)
2915 {
2916         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2917         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2918         size_t baselen;
2919         struct ieee802_11_elems elems;
2920         struct ieee80211_local *local = sdata->local;
2921         struct ieee80211_chanctx_conf *chanctx_conf;
2922         struct ieee80211_channel *chan;
2923         struct sta_info *sta;
2924         u32 changed = 0;
2925         bool erp_valid;
2926         u8 erp_value = 0;
2927         u32 ncrc;
2928         u8 *bssid;
2929         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2930
2931         sdata_assert_lock(sdata);
2932
2933         /* Process beacon from the current BSS */
2934         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2935         if (baselen > len)
2936                 return;
2937
2938         rcu_read_lock();
2939         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2940         if (!chanctx_conf) {
2941                 rcu_read_unlock();
2942                 return;
2943         }
2944
2945         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2946                 rcu_read_unlock();
2947                 return;
2948         }
2949         chan = chanctx_conf->def.chan;
2950         rcu_read_unlock();
2951
2952         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2953             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2954                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2955                                        len - baselen, false, &elems);
2956
2957                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2958                 if (elems.tim && !elems.parse_error) {
2959                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2960                         ifmgd->dtim_period = tim_ie->dtim_period;
2961                 }
2962                 ifmgd->have_beacon = true;
2963                 ifmgd->assoc_data->need_beacon = false;
2964                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2965                         sdata->vif.bss_conf.sync_tsf =
2966                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2967                         sdata->vif.bss_conf.sync_device_ts =
2968                                 rx_status->device_timestamp;
2969                         if (elems.tim)
2970                                 sdata->vif.bss_conf.sync_dtim_count =
2971                                         elems.tim->dtim_count;
2972                         else
2973                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2974                 }
2975                 /* continue assoc process */
2976                 ifmgd->assoc_data->timeout = jiffies;
2977                 ifmgd->assoc_data->timeout_started = true;
2978                 run_again(sdata, ifmgd->assoc_data->timeout);
2979                 return;
2980         }
2981
2982         if (!ifmgd->associated ||
2983             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2984                 return;
2985         bssid = ifmgd->associated->bssid;
2986
2987         /* Track average RSSI from the Beacon frames of the current AP */
2988         ifmgd->last_beacon_signal = rx_status->signal;
2989         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2990                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2991                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2992                 ifmgd->last_cqm_event_signal = 0;
2993                 ifmgd->count_beacon_signal = 1;
2994                 ifmgd->last_ave_beacon_signal = 0;
2995         } else {
2996                 ifmgd->ave_beacon_signal =
2997                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2998                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2999                          ifmgd->ave_beacon_signal) / 16;
3000                 ifmgd->count_beacon_signal++;
3001         }
3002
3003         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3004             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3005                 int sig = ifmgd->ave_beacon_signal;
3006                 int last_sig = ifmgd->last_ave_beacon_signal;
3007
3008                 /*
3009                  * if signal crosses either of the boundaries, invoke callback
3010                  * with appropriate parameters
3011                  */
3012                 if (sig > ifmgd->rssi_max_thold &&
3013                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3014                         ifmgd->last_ave_beacon_signal = sig;
3015                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3016                 } else if (sig < ifmgd->rssi_min_thold &&
3017                            (last_sig >= ifmgd->rssi_max_thold ||
3018                            last_sig == 0)) {
3019                         ifmgd->last_ave_beacon_signal = sig;
3020                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3021                 }
3022         }
3023
3024         if (bss_conf->cqm_rssi_thold &&
3025             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3026             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3027                 int sig = ifmgd->ave_beacon_signal / 16;
3028                 int last_event = ifmgd->last_cqm_event_signal;
3029                 int thold = bss_conf->cqm_rssi_thold;
3030                 int hyst = bss_conf->cqm_rssi_hyst;
3031                 if (sig < thold &&
3032                     (last_event == 0 || sig < last_event - hyst)) {
3033                         ifmgd->last_cqm_event_signal = sig;
3034                         ieee80211_cqm_rssi_notify(
3035                                 &sdata->vif,
3036                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3037                                 GFP_KERNEL);
3038                 } else if (sig > thold &&
3039                            (last_event == 0 || sig > last_event + hyst)) {
3040                         ifmgd->last_cqm_event_signal = sig;
3041                         ieee80211_cqm_rssi_notify(
3042                                 &sdata->vif,
3043                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3044                                 GFP_KERNEL);
3045                 }
3046         }
3047
3048         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3049                 mlme_dbg_ratelimited(sdata,
3050                                      "cancelling AP probe due to a received beacon\n");
3051                 ieee80211_reset_ap_probe(sdata);
3052         }
3053
3054         /*
3055          * Push the beacon loss detection into the future since
3056          * we are processing a beacon from the AP just now.
3057          */
3058         ieee80211_sta_reset_beacon_monitor(sdata);
3059
3060         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3061         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3062                                           len - baselen, false, &elems,
3063                                           care_about_ies, ncrc);
3064
3065         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3066                 bool directed_tim = ieee80211_check_tim(elems.tim,
3067                                                         elems.tim_len,
3068                                                         ifmgd->aid);
3069                 if (directed_tim) {
3070                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3071                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3072                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3073                                         ieee80211_hw_config(local,
3074                                                             IEEE80211_CONF_CHANGE_PS);
3075                                 }
3076                                 ieee80211_send_nullfunc(local, sdata, 0);
3077                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3078                                 local->pspolling = true;
3079
3080                                 /*
3081                                  * Here is assumed that the driver will be
3082                                  * able to send ps-poll frame and receive a
3083                                  * response even though power save mode is
3084                                  * enabled, but some drivers might require
3085                                  * to disable power save here. This needs
3086                                  * to be investigated.
3087                                  */
3088                                 ieee80211_send_pspoll(local, sdata);
3089                         }
3090                 }
3091         }
3092
3093         if (sdata->vif.p2p) {
3094                 struct ieee80211_p2p_noa_attr noa = {};
3095                 int ret;
3096
3097                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3098                                             len - baselen,
3099                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3100                                             (u8 *) &noa, sizeof(noa));
3101                 if (ret >= 2) {
3102                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3103                                 /* valid noa_attr and index changed */
3104                                 sdata->u.mgd.p2p_noa_index = noa.index;
3105                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3106                                 changed |= BSS_CHANGED_P2P_PS;
3107                                 /*
3108                                  * make sure we update all information, the CRC
3109                                  * mechanism doesn't look at P2P attributes.
3110                                  */
3111                                 ifmgd->beacon_crc_valid = false;
3112                         }
3113                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3114                         /* noa_attr not found and we had valid noa_attr before */
3115                         sdata->u.mgd.p2p_noa_index = -1;
3116                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3117                         changed |= BSS_CHANGED_P2P_PS;
3118                         ifmgd->beacon_crc_valid = false;
3119                 }
3120         }
3121
3122         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3123                 return;
3124         ifmgd->beacon_crc = ncrc;
3125         ifmgd->beacon_crc_valid = true;
3126
3127         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3128
3129         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3130                                          &elems, true);
3131
3132         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3133             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3134                                      elems.wmm_param_len))
3135                 changed |= BSS_CHANGED_QOS;
3136
3137         /*
3138          * If we haven't had a beacon before, tell the driver about the
3139          * DTIM period (and beacon timing if desired) now.
3140          */
3141         if (!ifmgd->have_beacon) {
3142                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3143                 if (elems.tim)
3144                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3145                 else
3146                         bss_conf->dtim_period = 1;
3147
3148                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3149                         sdata->vif.bss_conf.sync_tsf =
3150                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3151                         sdata->vif.bss_conf.sync_device_ts =
3152                                 rx_status->device_timestamp;
3153                         if (elems.tim)
3154                                 sdata->vif.bss_conf.sync_dtim_count =
3155                                         elems.tim->dtim_count;
3156                         else
3157                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3158                 }
3159
3160                 changed |= BSS_CHANGED_BEACON_INFO;
3161                 ifmgd->have_beacon = true;
3162
3163                 mutex_lock(&local->iflist_mtx);
3164                 ieee80211_recalc_ps(local, -1);
3165                 mutex_unlock(&local->iflist_mtx);
3166
3167                 ieee80211_recalc_ps_vif(sdata);
3168         }
3169
3170         if (elems.erp_info) {
3171                 erp_valid = true;
3172                 erp_value = elems.erp_info[0];
3173         } else {
3174                 erp_valid = false;
3175         }
3176         changed |= ieee80211_handle_bss_capability(sdata,
3177                         le16_to_cpu(mgmt->u.beacon.capab_info),
3178                         erp_valid, erp_value);
3179
3180         mutex_lock(&local->sta_mtx);
3181         sta = sta_info_get(sdata, bssid);
3182
3183         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3184                                 elems.vht_operation, bssid, &changed)) {
3185                 mutex_unlock(&local->sta_mtx);
3186                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3187                                        WLAN_REASON_DEAUTH_LEAVING,
3188                                        true, deauth_buf);
3189                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3190                                       sizeof(deauth_buf));
3191                 return;
3192         }
3193
3194         if (sta && elems.opmode_notif)
3195                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3196                                             rx_status->band, true);
3197         mutex_unlock(&local->sta_mtx);
3198
3199         if (elems.country_elem && elems.pwr_constr_elem &&
3200             mgmt->u.probe_resp.capab_info &
3201                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3202                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3203                                                        elems.country_elem,
3204                                                        elems.country_elem_len,
3205                                                        elems.pwr_constr_elem);
3206
3207         ieee80211_bss_info_change_notify(sdata, changed);
3208 }
3209
3210 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3211                                   struct sk_buff *skb)
3212 {
3213         struct ieee80211_rx_status *rx_status;
3214         struct ieee80211_mgmt *mgmt;
3215         u16 fc;
3216         struct ieee802_11_elems elems;
3217         int ies_len;
3218
3219         rx_status = (struct ieee80211_rx_status *) skb->cb;
3220         mgmt = (struct ieee80211_mgmt *) skb->data;
3221         fc = le16_to_cpu(mgmt->frame_control);
3222
3223         sdata_lock(sdata);
3224
3225         switch (fc & IEEE80211_FCTL_STYPE) {
3226         case IEEE80211_STYPE_BEACON:
3227                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3228                 break;
3229         case IEEE80211_STYPE_PROBE_RESP:
3230                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3231                 break;
3232         case IEEE80211_STYPE_AUTH:
3233                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3234                 break;
3235         case IEEE80211_STYPE_DEAUTH:
3236                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3237                 break;
3238         case IEEE80211_STYPE_DISASSOC:
3239                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3240                 break;
3241         case IEEE80211_STYPE_ASSOC_RESP:
3242         case IEEE80211_STYPE_REASSOC_RESP:
3243                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3244                 break;
3245         case IEEE80211_STYPE_ACTION:
3246                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3247                         ies_len = skb->len -
3248                                   offsetof(struct ieee80211_mgmt,
3249                                            u.action.u.chan_switch.variable);
3250
3251                         if (ies_len < 0)
3252                                 break;
3253
3254                         ieee802_11_parse_elems(
3255                                 mgmt->u.action.u.chan_switch.variable,
3256                                 ies_len, true, &elems);
3257
3258                         if (elems.parse_error)
3259                                 break;
3260
3261                         ieee80211_sta_process_chanswitch(sdata,
3262                                                          rx_status->mactime,
3263                                                          &elems, false);
3264                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3265                         ies_len = skb->len -
3266                                   offsetof(struct ieee80211_mgmt,
3267                                            u.action.u.ext_chan_switch.variable);
3268
3269                         if (ies_len < 0)
3270                                 break;
3271
3272                         ieee802_11_parse_elems(
3273                                 mgmt->u.action.u.ext_chan_switch.variable,
3274                                 ies_len, true, &elems);
3275
3276                         if (elems.parse_error)
3277                                 break;
3278
3279                         /* for the handling code pretend this was also an IE */
3280                         elems.ext_chansw_ie =
3281                                 &mgmt->u.action.u.ext_chan_switch.data;
3282
3283                         ieee80211_sta_process_chanswitch(sdata,
3284                                                          rx_status->mactime,
3285                                                          &elems, false);
3286                 }
3287                 break;
3288         }
3289         sdata_unlock(sdata);
3290 }
3291
3292 static void ieee80211_sta_timer(unsigned long data)
3293 {
3294         struct ieee80211_sub_if_data *sdata =
3295                 (struct ieee80211_sub_if_data *) data;
3296
3297         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3298 }
3299
3300 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3301                                           u8 *bssid, u8 reason, bool tx)
3302 {
3303         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3304
3305         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3306                                tx, frame_buf);
3307
3308         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3309                               IEEE80211_DEAUTH_FRAME_LEN);
3310 }
3311
3312 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3313 {
3314         struct ieee80211_local *local = sdata->local;
3315         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3316         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3317         u32 tx_flags = 0;
3318
3319         sdata_assert_lock(sdata);
3320
3321         if (WARN_ON_ONCE(!auth_data))
3322                 return -EINVAL;
3323
3324         auth_data->tries++;
3325
3326         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3327                 sdata_info(sdata, "authentication with %pM timed out\n",
3328                            auth_data->bss->bssid);
3329
3330                 /*
3331                  * Most likely AP is not in the range so remove the
3332                  * bss struct for that AP.
3333                  */
3334                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3335
3336                 return -ETIMEDOUT;
3337         }
3338
3339         drv_mgd_prepare_tx(local, sdata);
3340
3341         if (auth_data->bss->proberesp_ies) {
3342                 u16 trans = 1;
3343                 u16 status = 0;
3344
3345                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3346                            auth_data->bss->bssid, auth_data->tries,
3347                            IEEE80211_AUTH_MAX_TRIES);
3348
3349                 auth_data->expected_transaction = 2;
3350
3351                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3352                         trans = auth_data->sae_trans;
3353                         status = auth_data->sae_status;
3354                         auth_data->expected_transaction = trans;
3355                 }
3356
3357                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3358                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3359                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3360
3361                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3362                                     auth_data->data, auth_data->data_len,
3363                                     auth_data->bss->bssid,
3364                                     auth_data->bss->bssid, NULL, 0, 0,
3365                                     tx_flags);
3366         } else {
3367                 const u8 *ssidie;
3368
3369                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3370                            auth_data->bss->bssid, auth_data->tries,
3371                            IEEE80211_AUTH_MAX_TRIES);
3372
3373                 rcu_read_lock();
3374                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3375                 if (!ssidie) {
3376                         rcu_read_unlock();
3377                         return -EINVAL;
3378                 }
3379                 /*
3380                  * Direct probe is sent to broadcast address as some APs
3381                  * will not answer to direct packet in unassociated state.
3382                  */
3383                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3384                                          NULL, 0, (u32) -1, true, 0,
3385                                          auth_data->bss->channel, false);
3386                 rcu_read_unlock();
3387         }
3388
3389         if (tx_flags == 0) {
3390                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3391                 auth_data->timeout_started = true;
3392                 run_again(sdata, auth_data->timeout);
3393         } else {
3394                 auth_data->timeout =
3395                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3396                 auth_data->timeout_started = true;
3397                 run_again(sdata, auth_data->timeout);
3398         }
3399
3400         return 0;
3401 }
3402
3403 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3404 {
3405         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3406         struct ieee80211_local *local = sdata->local;
3407
3408         sdata_assert_lock(sdata);
3409
3410         assoc_data->tries++;
3411         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3412                 sdata_info(sdata, "association with %pM timed out\n",
3413                            assoc_data->bss->bssid);
3414
3415                 /*
3416                  * Most likely AP is not in the range so remove the
3417                  * bss struct for that AP.
3418                  */
3419                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3420
3421                 return -ETIMEDOUT;
3422         }
3423
3424         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3425                    assoc_data->bss->bssid, assoc_data->tries,
3426                    IEEE80211_ASSOC_MAX_TRIES);
3427         ieee80211_send_assoc(sdata);
3428
3429         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3430                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3431                 assoc_data->timeout_started = true;
3432                 run_again(sdata, assoc_data->timeout);
3433         } else {
3434                 assoc_data->timeout =
3435                         round_jiffies_up(jiffies +
3436                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3437                 assoc_data->timeout_started = true;
3438                 run_again(sdata, assoc_data->timeout);
3439         }
3440
3441         return 0;
3442 }
3443
3444 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3445                                   __le16 fc, bool acked)
3446 {
3447         struct ieee80211_local *local = sdata->local;
3448
3449         sdata->u.mgd.status_fc = fc;
3450         sdata->u.mgd.status_acked = acked;
3451         sdata->u.mgd.status_received = true;
3452
3453         ieee80211_queue_work(&local->hw, &sdata->work);
3454 }
3455
3456 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3457 {
3458         struct ieee80211_local *local = sdata->local;
3459         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3460
3461         sdata_lock(sdata);
3462
3463         if (ifmgd->status_received) {
3464                 __le16 fc = ifmgd->status_fc;
3465                 bool status_acked = ifmgd->status_acked;
3466
3467                 ifmgd->status_received = false;
3468                 if (ifmgd->auth_data &&
3469                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3470                         if (status_acked) {
3471                                 ifmgd->auth_data->timeout =
3472                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3473                                 run_again(sdata, ifmgd->auth_data->timeout);
3474                         } else {
3475                                 ifmgd->auth_data->timeout = jiffies - 1;
3476                         }
3477                         ifmgd->auth_data->timeout_started = true;
3478                 } else if (ifmgd->assoc_data &&
3479                            (ieee80211_is_assoc_req(fc) ||
3480                             ieee80211_is_reassoc_req(fc))) {
3481                         if (status_acked) {
3482                                 ifmgd->assoc_data->timeout =
3483                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3484                                 run_again(sdata, ifmgd->assoc_data->timeout);
3485                         } else {
3486                                 ifmgd->assoc_data->timeout = jiffies - 1;
3487                         }
3488                         ifmgd->assoc_data->timeout_started = true;
3489                 }
3490         }
3491
3492         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3493             time_after(jiffies, ifmgd->auth_data->timeout)) {
3494                 if (ifmgd->auth_data->done) {
3495                         /*
3496                          * ok ... we waited for assoc but userspace didn't,
3497                          * so let's just kill the auth data
3498                          */
3499                         ieee80211_destroy_auth_data(sdata, false);
3500                 } else if (ieee80211_probe_auth(sdata)) {
3501                         u8 bssid[ETH_ALEN];
3502
3503                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3504
3505                         ieee80211_destroy_auth_data(sdata, false);
3506
3507                         cfg80211_auth_timeout(sdata->dev, bssid);
3508                 }
3509         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3510                 run_again(sdata, ifmgd->auth_data->timeout);
3511
3512         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3513             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3514                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3515                     ieee80211_do_assoc(sdata)) {
3516                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3517
3518                         ieee80211_destroy_assoc_data(sdata, false);
3519                         cfg80211_assoc_timeout(sdata->dev, bss);
3520                 }
3521         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3522                 run_again(sdata, ifmgd->assoc_data->timeout);
3523
3524         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3525             ifmgd->associated) {
3526                 u8 bssid[ETH_ALEN];
3527                 int max_tries;
3528
3529                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3530
3531                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3532                         max_tries = max_nullfunc_tries;
3533                 else
3534                         max_tries = max_probe_tries;
3535
3536                 /* ACK received for nullfunc probing frame */
3537                 if (!ifmgd->probe_send_count)
3538                         ieee80211_reset_ap_probe(sdata);
3539                 else if (ifmgd->nullfunc_failed) {
3540                         if (ifmgd->probe_send_count < max_tries) {
3541                                 mlme_dbg(sdata,
3542                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3543                                          bssid, ifmgd->probe_send_count,
3544                                          max_tries);
3545                                 ieee80211_mgd_probe_ap_send(sdata);
3546                         } else {
3547                                 mlme_dbg(sdata,
3548                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3549                                          bssid);
3550                                 ieee80211_sta_connection_lost(sdata, bssid,
3551                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3552                                         false);
3553                         }
3554                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3555                         run_again(sdata, ifmgd->probe_timeout);
3556                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3557                         mlme_dbg(sdata,
3558                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3559                                  bssid, probe_wait_ms);
3560                         ieee80211_sta_connection_lost(sdata, bssid,
3561                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3562                 } else if (ifmgd->probe_send_count < max_tries) {
3563                         mlme_dbg(sdata,
3564                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3565                                  bssid, probe_wait_ms,
3566                                  ifmgd->probe_send_count, max_tries);
3567                         ieee80211_mgd_probe_ap_send(sdata);
3568                 } else {
3569                         /*
3570                          * We actually lost the connection ... or did we?
3571                          * Let's make sure!
3572                          */
3573                         wiphy_debug(local->hw.wiphy,
3574                                     "%s: No probe response from AP %pM"
3575                                     " after %dms, disconnecting.\n",
3576                                     sdata->name,
3577                                     bssid, probe_wait_ms);
3578
3579                         ieee80211_sta_connection_lost(sdata, bssid,
3580                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3581                 }
3582         }
3583
3584         sdata_unlock(sdata);
3585 }
3586
3587 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3588 {
3589         struct ieee80211_sub_if_data *sdata =
3590                 (struct ieee80211_sub_if_data *) data;
3591         struct ieee80211_local *local = sdata->local;
3592
3593         if (local->quiescing)
3594                 return;
3595
3596         if (sdata->vif.csa_active)
3597                 return;
3598
3599         sdata->u.mgd.connection_loss = false;
3600         ieee80211_queue_work(&sdata->local->hw,
3601                              &sdata->u.mgd.beacon_connection_loss_work);
3602 }
3603
3604 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3605 {
3606         struct ieee80211_sub_if_data *sdata =
3607                 (struct ieee80211_sub_if_data *) data;
3608         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3609         struct ieee80211_local *local = sdata->local;
3610
3611         if (local->quiescing)
3612                 return;
3613
3614         if (sdata->vif.csa_active)
3615                 return;
3616
3617         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3618 }
3619
3620 static void ieee80211_sta_monitor_work(struct work_struct *work)
3621 {
3622         struct ieee80211_sub_if_data *sdata =
3623                 container_of(work, struct ieee80211_sub_if_data,
3624                              u.mgd.monitor_work);
3625
3626         ieee80211_mgd_probe_ap(sdata, false);
3627 }
3628
3629 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3630 {
3631         u32 flags;
3632
3633         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3634                 __ieee80211_stop_poll(sdata);
3635
3636                 /* let's probe the connection once */
3637                 flags = sdata->local->hw.flags;
3638                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3639                         ieee80211_queue_work(&sdata->local->hw,
3640                                              &sdata->u.mgd.monitor_work);
3641                 /* and do all the other regular work too */
3642                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3643         }
3644 }
3645
3646 #ifdef CONFIG_PM
3647 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3648 {
3649         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3650         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3651
3652         sdata_lock(sdata);
3653
3654         if (ifmgd->auth_data || ifmgd->assoc_data) {
3655                 const u8 *bssid = ifmgd->auth_data ?
3656                                 ifmgd->auth_data->bss->bssid :
3657                                 ifmgd->assoc_data->bss->bssid;
3658
3659                 /*
3660                  * If we are trying to authenticate / associate while suspending,
3661                  * cfg80211 won't know and won't actually abort those attempts,
3662                  * thus we need to do that ourselves.
3663                  */
3664                 ieee80211_send_deauth_disassoc(sdata, bssid,
3665                                                IEEE80211_STYPE_DEAUTH,
3666                                                WLAN_REASON_DEAUTH_LEAVING,
3667                                                false, frame_buf);
3668                 if (ifmgd->assoc_data)
3669                         ieee80211_destroy_assoc_data(sdata, false);
3670                 if (ifmgd->auth_data)
3671                         ieee80211_destroy_auth_data(sdata, false);
3672                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3673                                       IEEE80211_DEAUTH_FRAME_LEN);
3674         }
3675
3676         sdata_unlock(sdata);
3677 }
3678
3679 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3680 {
3681         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3682
3683         sdata_lock(sdata);
3684         if (!ifmgd->associated) {
3685                 sdata_unlock(sdata);
3686                 return;
3687         }
3688
3689         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3690                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3691                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3692                 ieee80211_sta_connection_lost(sdata,
3693                                               ifmgd->associated->bssid,
3694                                               WLAN_REASON_UNSPECIFIED,
3695                                               true);
3696                 sdata_unlock(sdata);
3697                 return;
3698         }
3699         sdata_unlock(sdata);
3700 }
3701 #endif
3702
3703 /* interface setup */
3704 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3705 {
3706         struct ieee80211_if_managed *ifmgd;
3707
3708         ifmgd = &sdata->u.mgd;
3709         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3710         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3711         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3712                   ieee80211_beacon_connection_loss_work);
3713         INIT_WORK(&ifmgd->csa_connection_drop_work,
3714                   ieee80211_csa_connection_drop_work);
3715         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3716         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3717                     (unsigned long) sdata);
3718         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3719                     (unsigned long) sdata);
3720         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3721                     (unsigned long) sdata);
3722         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3723                     (unsigned long) sdata);
3724
3725         ifmgd->flags = 0;
3726         ifmgd->powersave = sdata->wdev.ps;
3727         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3728         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3729         ifmgd->p2p_noa_index = -1;
3730
3731         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3732                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3733         else
3734                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3735 }
3736
3737 /* scan finished notification */
3738 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3739 {
3740         struct ieee80211_sub_if_data *sdata;
3741
3742         /* Restart STA timers */
3743         rcu_read_lock();
3744         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3745                 if (ieee80211_sdata_running(sdata))
3746                         ieee80211_restart_sta_timer(sdata);
3747         }
3748         rcu_read_unlock();
3749 }
3750
3751 int ieee80211_max_network_latency(struct notifier_block *nb,
3752                                   unsigned long data, void *dummy)
3753 {
3754         s32 latency_usec = (s32) data;
3755         struct ieee80211_local *local =
3756                 container_of(nb, struct ieee80211_local,
3757                              network_latency_notifier);
3758
3759         mutex_lock(&local->iflist_mtx);
3760         ieee80211_recalc_ps(local, latency_usec);
3761         mutex_unlock(&local->iflist_mtx);
3762
3763         return NOTIFY_OK;
3764 }
3765
3766 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3767                                      struct cfg80211_bss *cbss)
3768 {
3769         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3770         const u8 *ht_cap_ie, *vht_cap_ie;
3771         const struct ieee80211_ht_cap *ht_cap;
3772         const struct ieee80211_vht_cap *vht_cap;
3773         u8 chains = 1;
3774
3775         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3776                 return chains;
3777
3778         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3779         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3780                 ht_cap = (void *)(ht_cap_ie + 2);
3781                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3782                 /*
3783                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3784                  *       "Tx Unequal Modulation Supported" fields.
3785                  */
3786         }
3787
3788         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3789                 return chains;
3790
3791         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3792         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3793                 u8 nss;
3794                 u16 tx_mcs_map;
3795
3796                 vht_cap = (void *)(vht_cap_ie + 2);
3797                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3798                 for (nss = 8; nss > 0; nss--) {
3799                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3800                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3801                                 break;
3802                 }
3803                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3804                 chains = max(chains, nss);
3805         }
3806
3807         return chains;
3808 }
3809
3810 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3811                                   struct cfg80211_bss *cbss)
3812 {
3813         struct ieee80211_local *local = sdata->local;
3814         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3815         const struct ieee80211_ht_operation *ht_oper = NULL;
3816         const struct ieee80211_vht_operation *vht_oper = NULL;
3817         struct ieee80211_supported_band *sband;
3818         struct cfg80211_chan_def chandef;
3819         int ret;
3820
3821         sband = local->hw.wiphy->bands[cbss->channel->band];
3822
3823         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3824                           IEEE80211_STA_DISABLE_80P80MHZ |
3825                           IEEE80211_STA_DISABLE_160MHZ);
3826
3827         rcu_read_lock();
3828
3829         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3830             sband->ht_cap.ht_supported) {
3831                 const u8 *ht_oper_ie, *ht_cap;
3832
3833                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3834                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3835                         ht_oper = (void *)(ht_oper_ie + 2);
3836
3837                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3838                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3839                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3840                         ht_oper = NULL;
3841                 }
3842         }
3843
3844         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3845             sband->vht_cap.vht_supported) {
3846                 const u8 *vht_oper_ie, *vht_cap;
3847
3848                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3849                                                    WLAN_EID_VHT_OPERATION);
3850                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3851                         vht_oper = (void *)(vht_oper_ie + 2);
3852                 if (vht_oper && !ht_oper) {
3853                         vht_oper = NULL;
3854                         sdata_info(sdata,
3855                                    "AP advertised VHT without HT, disabling both\n");
3856                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3857                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3858                 }
3859
3860                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3861                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3862                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3863                         vht_oper = NULL;
3864                 }
3865         }
3866
3867         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3868                                                      cbss->channel,
3869                                                      ht_oper, vht_oper,
3870                                                      &chandef, false);
3871
3872         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3873                                       local->rx_chains);
3874
3875         rcu_read_unlock();
3876
3877         /* will change later if needed */
3878         sdata->smps_mode = IEEE80211_SMPS_OFF;
3879
3880         mutex_lock(&local->mtx);
3881         /*
3882          * If this fails (possibly due to channel context sharing
3883          * on incompatible channels, e.g. 80+80 and 160 sharing the
3884          * same control channel) try to use a smaller bandwidth.
3885          */
3886         ret = ieee80211_vif_use_channel(sdata, &chandef,
3887                                         IEEE80211_CHANCTX_SHARED);
3888
3889         /* don't downgrade for 5 and 10 MHz channels, though. */
3890         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3891             chandef.width == NL80211_CHAN_WIDTH_10)
3892                 goto out;
3893
3894         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3895                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3896                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3897                                                 IEEE80211_CHANCTX_SHARED);
3898         }
3899  out:
3900         mutex_unlock(&local->mtx);
3901         return ret;
3902 }
3903
3904 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3905                                      struct cfg80211_bss *cbss, bool assoc)
3906 {
3907         struct ieee80211_local *local = sdata->local;
3908         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3909         struct ieee80211_bss *bss = (void *)cbss->priv;
3910         struct sta_info *new_sta = NULL;
3911         bool have_sta = false;
3912         int err;
3913
3914         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3915                 return -EINVAL;
3916
3917         if (assoc) {
3918                 rcu_read_lock();
3919                 have_sta = sta_info_get(sdata, cbss->bssid);
3920                 rcu_read_unlock();
3921         }
3922
3923         if (!have_sta) {
3924                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3925                 if (!new_sta)
3926                         return -ENOMEM;
3927         }
3928         if (new_sta) {
3929                 u32 rates = 0, basic_rates = 0;
3930                 bool have_higher_than_11mbit;
3931                 int min_rate = INT_MAX, min_rate_index = -1;
3932                 struct ieee80211_chanctx_conf *chanctx_conf;
3933                 struct ieee80211_supported_band *sband;
3934                 const struct cfg80211_bss_ies *ies;
3935                 int shift;
3936                 u32 rate_flags;
3937
3938                 sband = local->hw.wiphy->bands[cbss->channel->band];
3939
3940                 err = ieee80211_prep_channel(sdata, cbss);
3941                 if (err) {
3942                         sta_info_free(local, new_sta);
3943                         return -EINVAL;
3944                 }
3945                 shift = ieee80211_vif_get_shift(&sdata->vif);
3946
3947                 rcu_read_lock();
3948                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3949                 if (WARN_ON(!chanctx_conf)) {
3950                         rcu_read_unlock();
3951                         sta_info_free(local, new_sta);
3952                         return -EINVAL;
3953                 }
3954                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3955                 rcu_read_unlock();
3956
3957                 ieee80211_get_rates(sband, bss->supp_rates,
3958                                     bss->supp_rates_len,
3959                                     &rates, &basic_rates,
3960                                     &have_higher_than_11mbit,
3961                                     &min_rate, &min_rate_index,
3962                                     shift, rate_flags);
3963
3964                 /*
3965                  * This used to be a workaround for basic rates missing
3966                  * in the association response frame. Now that we no
3967                  * longer use the basic rates from there, it probably
3968                  * doesn't happen any more, but keep the workaround so
3969                  * in case some *other* APs are buggy in different ways
3970                  * we can connect -- with a warning.
3971                  */
3972                 if (!basic_rates && min_rate_index >= 0) {
3973                         sdata_info(sdata,
3974                                    "No basic rates, using min rate instead\n");
3975                         basic_rates = BIT(min_rate_index);
3976                 }
3977
3978                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3979                 sdata->vif.bss_conf.basic_rates = basic_rates;
3980
3981                 /* cf. IEEE 802.11 9.2.12 */
3982                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3983                     have_higher_than_11mbit)
3984                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3985                 else
3986                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3987
3988                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3989
3990                 /* set timing information */
3991                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3992                 rcu_read_lock();
3993                 ies = rcu_dereference(cbss->beacon_ies);
3994                 if (ies) {
3995                         const u8 *tim_ie;
3996
3997                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3998                         sdata->vif.bss_conf.sync_device_ts =
3999                                 bss->device_ts_beacon;
4000                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4001                                                   ies->data, ies->len);
4002                         if (tim_ie && tim_ie[1] >= 2)
4003                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4004                         else
4005                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4006                 } else if (!(local->hw.flags &
4007                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
4008                         ies = rcu_dereference(cbss->proberesp_ies);
4009                         /* must be non-NULL since beacon IEs were NULL */
4010                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4011                         sdata->vif.bss_conf.sync_device_ts =
4012                                 bss->device_ts_presp;
4013                         sdata->vif.bss_conf.sync_dtim_count = 0;
4014                 } else {
4015                         sdata->vif.bss_conf.sync_tsf = 0;
4016                         sdata->vif.bss_conf.sync_device_ts = 0;
4017                         sdata->vif.bss_conf.sync_dtim_count = 0;
4018                 }
4019                 rcu_read_unlock();
4020
4021                 /* tell driver about BSSID, basic rates and timing */
4022                 ieee80211_bss_info_change_notify(sdata,
4023                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4024                         BSS_CHANGED_BEACON_INT);
4025
4026                 if (assoc)
4027                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4028
4029                 err = sta_info_insert(new_sta);
4030                 new_sta = NULL;
4031                 if (err) {
4032                         sdata_info(sdata,
4033                                    "failed to insert STA entry for the AP (error %d)\n",
4034                                    err);
4035                         return err;
4036                 }
4037         } else
4038                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4039
4040         return 0;
4041 }
4042
4043 /* config hooks */
4044 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4045                        struct cfg80211_auth_request *req)
4046 {
4047         struct ieee80211_local *local = sdata->local;
4048         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4049         struct ieee80211_mgd_auth_data *auth_data;
4050         u16 auth_alg;
4051         int err;
4052
4053         /* prepare auth data structure */
4054
4055         switch (req->auth_type) {
4056         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4057                 auth_alg = WLAN_AUTH_OPEN;
4058                 break;
4059         case NL80211_AUTHTYPE_SHARED_KEY:
4060                 if (IS_ERR(local->wep_tx_tfm))
4061                         return -EOPNOTSUPP;
4062                 auth_alg = WLAN_AUTH_SHARED_KEY;
4063                 break;
4064         case NL80211_AUTHTYPE_FT:
4065                 auth_alg = WLAN_AUTH_FT;
4066                 break;
4067         case NL80211_AUTHTYPE_NETWORK_EAP:
4068                 auth_alg = WLAN_AUTH_LEAP;
4069                 break;
4070         case NL80211_AUTHTYPE_SAE:
4071                 auth_alg = WLAN_AUTH_SAE;
4072                 break;
4073         default:
4074                 return -EOPNOTSUPP;
4075         }
4076
4077         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4078                             req->ie_len, GFP_KERNEL);
4079         if (!auth_data)
4080                 return -ENOMEM;
4081
4082         auth_data->bss = req->bss;
4083
4084         if (req->sae_data_len >= 4) {
4085                 __le16 *pos = (__le16 *) req->sae_data;
4086                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4087                 auth_data->sae_status = le16_to_cpu(pos[1]);
4088                 memcpy(auth_data->data, req->sae_data + 4,
4089                        req->sae_data_len - 4);
4090                 auth_data->data_len += req->sae_data_len - 4;
4091         }
4092
4093         if (req->ie && req->ie_len) {
4094                 memcpy(&auth_data->data[auth_data->data_len],
4095                        req->ie, req->ie_len);
4096                 auth_data->data_len += req->ie_len;
4097         }
4098
4099         if (req->key && req->key_len) {
4100                 auth_data->key_len = req->key_len;
4101                 auth_data->key_idx = req->key_idx;
4102                 memcpy(auth_data->key, req->key, req->key_len);
4103         }
4104
4105         auth_data->algorithm = auth_alg;
4106
4107         /* try to authenticate/probe */
4108
4109         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4110             ifmgd->assoc_data) {
4111                 err = -EBUSY;
4112                 goto err_free;
4113         }
4114
4115         if (ifmgd->auth_data)
4116                 ieee80211_destroy_auth_data(sdata, false);
4117
4118         /* prep auth_data so we don't go into idle on disassoc */
4119         ifmgd->auth_data = auth_data;
4120
4121         if (ifmgd->associated) {
4122                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4123
4124                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4125                                        WLAN_REASON_UNSPECIFIED,
4126                                        false, frame_buf);
4127
4128                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4129                                       sizeof(frame_buf));
4130         }
4131
4132         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4133
4134         err = ieee80211_prep_connection(sdata, req->bss, false);
4135         if (err)
4136                 goto err_clear;
4137
4138         err = ieee80211_probe_auth(sdata);
4139         if (err) {
4140                 sta_info_destroy_addr(sdata, req->bss->bssid);
4141                 goto err_clear;
4142         }
4143
4144         /* hold our own reference */
4145         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4146         return 0;
4147
4148  err_clear:
4149         memset(ifmgd->bssid, 0, ETH_ALEN);
4150         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4151         ifmgd->auth_data = NULL;
4152  err_free:
4153         kfree(auth_data);
4154         return err;
4155 }
4156
4157 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4158                                         const u8 *wmm_param, int len)
4159 {
4160         const u8 *pos;
4161         size_t left;
4162
4163         if (len < 8)
4164                 return false;
4165
4166         if (wmm_param[5] != 1 /* version */)
4167                 return false;
4168
4169         pos = wmm_param + 8;
4170         left = len - 8;
4171
4172         for (; left >= 4; left -= 4, pos += 4) {
4173                 u8 aifsn = pos[0] & 0x0f;
4174                 u8 ecwmin = pos[1] & 0x0f;
4175                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4176                 int aci = (pos[0] >> 5) & 0x03;
4177
4178                 if (aifsn < 2) {
4179                         sdata_info(sdata,
4180                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4181                                    aifsn, aci);
4182                         return false;
4183                 }
4184                 if (ecwmin > ecwmax) {
4185                         sdata_info(sdata,
4186                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4187                                    ecwmin, ecwmax, aci);
4188                         return false;
4189                 }
4190         }
4191
4192         return true;
4193 }
4194
4195 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4196                         struct cfg80211_assoc_request *req)
4197 {
4198         struct ieee80211_local *local = sdata->local;
4199         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4200         struct ieee80211_bss *bss = (void *)req->bss->priv;
4201         struct ieee80211_mgd_assoc_data *assoc_data;
4202         const struct cfg80211_bss_ies *beacon_ies;
4203         struct ieee80211_supported_band *sband;
4204         const u8 *ssidie, *ht_ie, *vht_ie;
4205         int i, err;
4206
4207         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4208         if (!assoc_data)
4209                 return -ENOMEM;
4210
4211         rcu_read_lock();
4212         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4213         if (!ssidie) {
4214                 rcu_read_unlock();
4215                 kfree(assoc_data);
4216                 return -EINVAL;
4217         }
4218         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4219         assoc_data->ssid_len = ssidie[1];
4220         rcu_read_unlock();
4221
4222         if (ifmgd->associated) {
4223                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4224
4225                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4226                                        WLAN_REASON_UNSPECIFIED,
4227                                        false, frame_buf);
4228
4229                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4230                                       sizeof(frame_buf));
4231         }
4232
4233         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4234                 err = -EBUSY;
4235                 goto err_free;
4236         }
4237
4238         if (ifmgd->assoc_data) {
4239                 err = -EBUSY;
4240                 goto err_free;
4241         }
4242
4243         if (ifmgd->auth_data) {
4244                 bool match;
4245
4246                 /* keep sta info, bssid if matching */
4247                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4248                 ieee80211_destroy_auth_data(sdata, match);
4249         }
4250
4251         /* prepare assoc data */
4252
4253         ifmgd->beacon_crc_valid = false;
4254
4255         assoc_data->wmm = bss->wmm_used &&
4256                           (local->hw.queues >= IEEE80211_NUM_ACS);
4257         if (assoc_data->wmm) {
4258                 /* try to check validity of WMM params IE */
4259                 const struct cfg80211_bss_ies *ies;
4260                 const u8 *wp, *start, *end;
4261
4262                 rcu_read_lock();
4263                 ies = rcu_dereference(req->bss->ies);
4264                 start = ies->data;
4265                 end = start + ies->len;
4266
4267                 while (true) {
4268                         wp = cfg80211_find_vendor_ie(
4269                                 WLAN_OUI_MICROSOFT,
4270                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4271                                 start, end - start);
4272                         if (!wp)
4273                                 break;
4274                         start = wp + wp[1] + 2;
4275                         /* if this IE is too short, try the next */
4276                         if (wp[1] <= 4)
4277                                 continue;
4278                         /* if this IE is WMM params, we found what we wanted */
4279                         if (wp[6] == 1)
4280                                 break;
4281                 }
4282
4283                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4284                                                         wp[1] - 2)) {
4285                         assoc_data->wmm = false;
4286                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4287                 }
4288                 rcu_read_unlock();
4289         }
4290
4291         /*
4292          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4293          * We still associate in non-HT mode (11a/b/g) if any one of these
4294          * ciphers is configured as pairwise.
4295          * We can set this to true for non-11n hardware, that'll be checked
4296          * separately along with the peer capabilities.
4297          */
4298         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4299                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4300                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4301                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4302                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4303                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4304                         netdev_info(sdata->dev,
4305                                     "disabling HT/VHT due to WEP/TKIP use\n");
4306                 }
4307         }
4308
4309         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4310                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4311                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4312         }
4313
4314         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4315                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4316
4317         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4318         sband = local->hw.wiphy->bands[req->bss->channel->band];
4319         if (!sband->ht_cap.ht_supported ||
4320             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4321             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4322                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4323                 if (!bss->wmm_used &&
4324                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4325                         netdev_info(sdata->dev,
4326                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4327         }
4328
4329         /* disable VHT if we don't support it or the AP doesn't use WMM */
4330         if (!sband->vht_cap.vht_supported ||
4331             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4332             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4333                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4334                 if (!bss->wmm_used &&
4335                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4336                         netdev_info(sdata->dev,
4337                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4338         }
4339
4340         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4341         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4342                sizeof(ifmgd->ht_capa_mask));
4343
4344         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4345         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4346                sizeof(ifmgd->vht_capa_mask));
4347
4348         if (req->ie && req->ie_len) {
4349                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4350                 assoc_data->ie_len = req->ie_len;
4351         }
4352
4353         assoc_data->bss = req->bss;
4354
4355         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4356                 if (ifmgd->powersave)
4357                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4358                 else
4359                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4360         } else
4361                 sdata->smps_mode = ifmgd->req_smps;
4362
4363         assoc_data->capability = req->bss->capability;
4364         assoc_data->supp_rates = bss->supp_rates;
4365         assoc_data->supp_rates_len = bss->supp_rates_len;
4366
4367         rcu_read_lock();
4368         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4369         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4370                 assoc_data->ap_ht_param =
4371                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4372         else
4373                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4374         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4375         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4376                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4377                        sizeof(struct ieee80211_vht_cap));
4378         else
4379                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4380         rcu_read_unlock();
4381
4382         if (bss->wmm_used && bss->uapsd_supported &&
4383             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4384             sdata->wmm_acm != 0xff) {
4385                 assoc_data->uapsd = true;
4386                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4387         } else {
4388                 assoc_data->uapsd = false;
4389                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4390         }
4391
4392         if (req->prev_bssid)
4393                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4394
4395         if (req->use_mfp) {
4396                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4397                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4398         } else {
4399                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4400                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4401         }
4402
4403         if (req->crypto.control_port)
4404                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4405         else
4406                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4407
4408         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4409         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4410         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4411                                                         sdata->vif.type);
4412
4413         /* kick off associate process */
4414
4415         ifmgd->assoc_data = assoc_data;
4416         ifmgd->dtim_period = 0;
4417         ifmgd->have_beacon = false;
4418
4419         err = ieee80211_prep_connection(sdata, req->bss, true);
4420         if (err)
4421                 goto err_clear;
4422
4423         rcu_read_lock();
4424         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4425
4426         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4427             !beacon_ies) {
4428                 /*
4429                  * Wait up to one beacon interval ...
4430                  * should this be more if we miss one?
4431                  */
4432                 sdata_info(sdata, "waiting for beacon from %pM\n",
4433                            ifmgd->bssid);
4434                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4435                 assoc_data->timeout_started = true;
4436                 assoc_data->need_beacon = true;
4437         } else if (beacon_ies) {
4438                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4439                                                     beacon_ies->data,
4440                                                     beacon_ies->len);
4441                 u8 dtim_count = 0;
4442
4443                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4444                         const struct ieee80211_tim_ie *tim;
4445                         tim = (void *)(tim_ie + 2);
4446                         ifmgd->dtim_period = tim->dtim_period;
4447                         dtim_count = tim->dtim_count;
4448                 }
4449                 ifmgd->have_beacon = true;
4450                 assoc_data->timeout = jiffies;
4451                 assoc_data->timeout_started = true;
4452
4453                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4454                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4455                         sdata->vif.bss_conf.sync_device_ts =
4456                                 bss->device_ts_beacon;
4457                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4458                 }
4459         } else {
4460                 assoc_data->timeout = jiffies;
4461                 assoc_data->timeout_started = true;
4462         }
4463         rcu_read_unlock();
4464
4465         run_again(sdata, assoc_data->timeout);
4466
4467         if (bss->corrupt_data) {
4468                 char *corrupt_type = "data";
4469                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4470                         if (bss->corrupt_data &
4471                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4472                                 corrupt_type = "beacon and probe response";
4473                         else
4474                                 corrupt_type = "beacon";
4475                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4476                         corrupt_type = "probe response";
4477                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4478                            corrupt_type);
4479         }
4480
4481         return 0;
4482  err_clear:
4483         memset(ifmgd->bssid, 0, ETH_ALEN);
4484         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4485         ifmgd->assoc_data = NULL;
4486  err_free:
4487         kfree(assoc_data);
4488         return err;
4489 }
4490
4491 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4492                          struct cfg80211_deauth_request *req)
4493 {
4494         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4495         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4496         bool tx = !req->local_state_change;
4497
4498         if (ifmgd->auth_data &&
4499             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4500                 sdata_info(sdata,
4501                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4502                            req->bssid, req->reason_code,
4503                            ieee80211_get_reason_code_string(req->reason_code));
4504
4505                 drv_mgd_prepare_tx(sdata->local, sdata);
4506                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4507                                                IEEE80211_STYPE_DEAUTH,
4508                                                req->reason_code, tx,
4509                                                frame_buf);
4510                 ieee80211_destroy_auth_data(sdata, false);
4511                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4512                                       IEEE80211_DEAUTH_FRAME_LEN);
4513
4514                 return 0;
4515         }
4516
4517         if (ifmgd->associated &&
4518             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4519                 sdata_info(sdata,
4520                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4521                            req->bssid, req->reason_code,
4522                            ieee80211_get_reason_code_string(req->reason_code));
4523
4524                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4525                                        req->reason_code, tx, frame_buf);
4526                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4527                                       IEEE80211_DEAUTH_FRAME_LEN);
4528                 return 0;
4529         }
4530
4531         return -ENOTCONN;
4532 }
4533
4534 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4535                            struct cfg80211_disassoc_request *req)
4536 {
4537         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4538         u8 bssid[ETH_ALEN];
4539         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4540
4541         /*
4542          * cfg80211 should catch this ... but it's racy since
4543          * we can receive a disassoc frame, process it, hand it
4544          * to cfg80211 while that's in a locked section already
4545          * trying to tell us that the user wants to disconnect.
4546          */
4547         if (ifmgd->associated != req->bss)
4548                 return -ENOLINK;
4549
4550         sdata_info(sdata,
4551                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4552                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4553
4554         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4555         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4556                                req->reason_code, !req->local_state_change,
4557                                frame_buf);
4558
4559         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4560                               IEEE80211_DEAUTH_FRAME_LEN);
4561
4562         return 0;
4563 }
4564
4565 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4566 {
4567         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4568
4569         /*
4570          * Make sure some work items will not run after this,
4571          * they will not do anything but might not have been
4572          * cancelled when disconnecting.
4573          */
4574         cancel_work_sync(&ifmgd->monitor_work);
4575         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4576         cancel_work_sync(&ifmgd->request_smps_work);
4577         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4578         cancel_work_sync(&ifmgd->chswitch_work);
4579
4580         sdata_lock(sdata);
4581         if (ifmgd->assoc_data) {
4582                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4583                 ieee80211_destroy_assoc_data(sdata, false);
4584                 cfg80211_assoc_timeout(sdata->dev, bss);
4585         }
4586         if (ifmgd->auth_data)
4587                 ieee80211_destroy_auth_data(sdata, false);
4588         del_timer_sync(&ifmgd->timer);
4589         sdata_unlock(sdata);
4590 }
4591
4592 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4593                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4594                                gfp_t gfp)
4595 {
4596         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4597
4598         trace_api_cqm_rssi_notify(sdata, rssi_event);
4599
4600         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4601 }
4602 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);