net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  34 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  35 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  36 #define IEEE80211_AUTH_MAX_TRIES        3
  37 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  38 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  39 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  40 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  41 #define IEEE80211_ASSOC_MAX_TRIES       3
  42
  43 static int max_nullfunc_tries = 2;
  44 module_param(max_nullfunc_tries, int, 0644);
  45 MODULE_PARM_DESC(max_nullfunc_tries,
  46                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  47
  48 static int max_probe_tries = 5;
  49 module_param(max_probe_tries, int, 0644);
  50 MODULE_PARM_DESC(max_probe_tries,
  51                  "Maximum probe tries before disconnecting (reason 4).");
  52
  53 /*
  54  * Beacon loss timeout is calculated as N frames times the
  55  * advertised beacon interval.  This may need to be somewhat
  56  * higher than what hardware might detect to account for
  57  * delays in the host processing frames. But since we also
  58  * probe on beacon miss before declaring the connection lost
  59  * default to what we want.
  60  */
  61 static int beacon_loss_count = 7;
  62 module_param(beacon_loss_count, int, 0644);
  63 MODULE_PARM_DESC(beacon_loss_count,
  64                  "Number of beacon intervals before we decide beacon was lost.");
  65
  66 /*
  67  * Time the connection can be idle before we probe
  68  * it to see if we can still talk to the AP.
  69  */
  70 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  71 /*
  72  * Time we wait for a probe response after sending
  73  * a probe request because of beacon loss or for
  74  * checking the connection still works.
  75  */
  76 static int probe_wait_ms = 500;
  77 module_param(probe_wait_ms, int, 0644);
  78 MODULE_PARM_DESC(probe_wait_ms,
  79                  "Maximum time(ms) to wait for probe response"
  80                  " before disconnecting (reason 4).");
  81
  82 /*
  83  * Weight given to the latest Beacon frame when calculating average signal
  84  * strength for Beacon frames received in the current BSS. This must be
  85  * between 1 and 15.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  88
  89 /*
  90  * How many Beacon frames need to have been used in average signal strength
  91  * before starting to indicate signal change events.
  92  */
  93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  94
  95 /*
  96  * We can have multiple work items (and connection probing)
  97  * scheduling this timer, but we need to take care to only
  98  * reschedule it when it should fire _earlier_ than it was
  99  * asked for before, or if it's not pending right now. This
 100  * function ensures that. Note that it then is required to
 101  * run this function for all timeouts after the first one
 102  * has happened -- the work that runs from this timer will
 103  * do that.
 104  */
 105 static void run_again(struct ieee80211_sub_if_data *sdata,
 106                       unsigned long timeout)
 107 {
 108         sdata_assert_lock(sdata);
 109
 110         if (!timer_pending(&sdata->u.mgd.timer) ||
 111             time_before(timeout, sdata->u.mgd.timer.expires))
 112                 mod_timer(&sdata->u.mgd.timer, timeout);
 113 }
 114
 115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 116 {
 117         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 118                 return;
 119
 120         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 121                 return;
 122
 123         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 124                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 125 }
 126
 127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 128 {
 129         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 130
 131         if (unlikely(!sdata->u.mgd.associated))
 132                 return;
 133
 134         ifmgd->probe_send_count = 0;
 135
 136         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 137                 return;
 138
 139         mod_timer(&sdata->u.mgd.conn_mon_timer,
 140                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 141 }
 142
 143 static int ecw2cw(int ecw)
 144 {
 145         return (1 << ecw) - 1;
 146 }
 147
 148 static u32
 149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 150                              struct ieee80211_supported_band *sband,
 151                              struct ieee80211_channel *channel,
 152                              const struct ieee80211_ht_operation *ht_oper,
 153                              const struct ieee80211_vht_operation *vht_oper,
 154                              struct cfg80211_chan_def *chandef, bool tracking)
 155 {
 156         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 157         struct cfg80211_chan_def vht_chandef;
 158         u32 ht_cfreq, ret;
 159
 160         chandef->chan = channel;
 161         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 162         chandef->center_freq1 = channel->center_freq;
 163         chandef->center_freq2 = 0;
 164
 165         if (!ht_oper || !sband->ht_cap.ht_supported) {
 166                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 167                 goto out;
 168         }
 169
 170         chandef->width = NL80211_CHAN_WIDTH_20;
 171
 172         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 173                                                   channel->band);
 174         /* check that channel matches the right operating channel */
 175         if (!tracking && channel->center_freq != ht_cfreq) {
 176                 /*
 177                  * It's possible that some APs are confused here;
 178                  * Netgear WNDR3700 sometimes reports 4 higher than
 179                  * the actual channel in association responses, but
 180                  * since we look at probe response/beacon data here
 181                  * it should be OK.
 182                  */
 183                 sdata_info(sdata,
 184                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 185                            channel->center_freq, ht_cfreq,
 186                            ht_oper->primary_chan, channel->band);
 187                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 188                 goto out;
 189         }
 190
 191         /* check 40 MHz support, if we have it */
 192         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 193                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 194                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 195                         chandef->width = NL80211_CHAN_WIDTH_40;
 196                         chandef->center_freq1 += 10;
 197                         break;
 198                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 199                         chandef->width = NL80211_CHAN_WIDTH_40;
 200                         chandef->center_freq1 -= 10;
 201                         break;
 202                 }
 203         } else {
 204                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 205                 ret = IEEE80211_STA_DISABLE_VHT;
 206                 /* also mark 40 MHz disabled */
 207                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 208                 goto out;
 209         }
 210
 211         if (!vht_oper || !sband->vht_cap.vht_supported) {
 212                 ret = IEEE80211_STA_DISABLE_VHT;
 213                 goto out;
 214         }
 215
 216         vht_chandef.chan = channel;
 217         vht_chandef.center_freq1 =
 218                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 219                                                channel->band);
 220         vht_chandef.center_freq2 = 0;
 221
 222         switch (vht_oper->chan_width) {
 223         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 224                 vht_chandef.width = chandef->width;
 225                 vht_chandef.center_freq1 = chandef->center_freq1;
 226                 break;
 227         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 228                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 229                 break;
 230         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 231                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 232                 break;
 233         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 234                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 235                 vht_chandef.center_freq2 =
 236                         ieee80211_channel_to_frequency(
 237                                 vht_oper->center_freq_seg2_idx,
 238                                 channel->band);
 239                 break;
 240         default:
 241                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 242                         sdata_info(sdata,
 243                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 244                                    vht_oper->chan_width);
 245                 ret = IEEE80211_STA_DISABLE_VHT;
 246                 goto out;
 247         }
 248
 249         if (!cfg80211_chandef_valid(&vht_chandef)) {
 250                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 251                         sdata_info(sdata,
 252                                    "AP VHT information is invalid, disable VHT\n");
 253                 ret = IEEE80211_STA_DISABLE_VHT;
 254                 goto out;
 255         }
 256
 257         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 258                 ret = 0;
 259                 goto out;
 260         }
 261
 262         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 263                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 264                         sdata_info(sdata,
 265                                    "AP VHT information doesn't match HT, disable VHT\n");
 266                 ret = IEEE80211_STA_DISABLE_VHT;
 267                 goto out;
 268         }
 269
 270         *chandef = vht_chandef;
 271
 272         ret = 0;
 273
 274 out:
 275         /*
 276          * When tracking the current AP, don't do any further checks if the
 277          * new chandef is identical to the one we're currently using for the
 278          * connection. This keeps us from playing ping-pong with regulatory,
 279          * without it the following can happen (for example):
 280          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 281          *  - AP advertises regdom US
 282          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 283          *  - the code below detects an unsupported channel, downgrades, and
 284          *    we disconnect from the AP in the caller
 285          *  - disconnect causes CRDA to reload world regdomain and the game
 286          *    starts anew.
 287          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 288          *
 289          * It seems possible that there are still scenarios with CSA or real
 290          * bandwidth changes where a this could happen, but those cases are
 291          * less common and wouldn't completely prevent using the AP.
 292          */
 293         if (tracking &&
 294             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 295                 return ret;
 296
 297         /* don't print the message below for VHT mismatch if VHT is disabled */
 298         if (ret & IEEE80211_STA_DISABLE_VHT)
 299                 vht_chandef = *chandef;
 300
 301         /*
 302          * Ignore the DISABLED flag when we're already connected and only
 303          * tracking the APs beacon for bandwidth changes - otherwise we
 304          * might get disconnected here if we connect to an AP, update our
 305          * regulatory information based on the AP's country IE and the
 306          * information we have is wrong/outdated and disables the channel
 307          * that we're actually using for the connection to the AP.
 308          */
 309         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 310                                         tracking ? 0 :
 311                                                    IEEE80211_CHAN_DISABLED)) {
 312                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 313                         ret = IEEE80211_STA_DISABLE_HT |
 314                               IEEE80211_STA_DISABLE_VHT;
 315                         break;
 316                 }
 317
 318                 ret |= ieee80211_chandef_downgrade(chandef);
 319         }
 320
 321         if (chandef->width != vht_chandef.width && !tracking)
 322                 sdata_info(sdata,
 323                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 324
 325         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 326         return ret;
 327 }
 328
 329 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 330                                struct sta_info *sta,
 331                                const struct ieee80211_ht_operation *ht_oper,
 332                                const struct ieee80211_vht_operation *vht_oper,
 333                                const u8 *bssid, u32 *changed)
 334 {
 335         struct ieee80211_local *local = sdata->local;
 336         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 337         struct ieee80211_supported_band *sband;
 338         struct ieee80211_channel *chan;
 339         struct cfg80211_chan_def chandef;
 340         u16 ht_opmode;
 341         u32 flags;
 342         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 343         int ret;
 344
 345         /* if HT was/is disabled, don't track any bandwidth changes */
 346         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 347                 return 0;
 348
 349         /* don't check VHT if we associated as non-VHT station */
 350         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 351                 vht_oper = NULL;
 352
 353         if (WARN_ON_ONCE(!sta))
 354                 return -EINVAL;
 355
 356         /*
 357          * if bss configuration changed store the new one -
 358          * this may be applicable even if channel is identical
 359          */
 360         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 361         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 362                 *changed |= BSS_CHANGED_HT;
 363                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 364         }
 365
 366         chan = sdata->vif.bss_conf.chandef.chan;
 367         sband = local->hw.wiphy->bands[chan->band];
 368
 369         /* calculate new channel (type) based on HT/VHT operation IEs */
 370         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 371                                              vht_oper, &chandef, true);
 372
 373         /*
 374          * Downgrade the new channel if we associated with restricted
 375          * capabilities. For example, if we associated as a 20 MHz STA
 376          * to a 40 MHz AP (due to regulatory, capabilities or config
 377          * reasons) then switching to a 40 MHz channel now won't do us
 378          * any good -- we couldn't use it with the AP.
 379          */
 380         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 381             chandef.width == NL80211_CHAN_WIDTH_80P80)
 382                 flags |= ieee80211_chandef_downgrade(&chandef);
 383         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 384             chandef.width == NL80211_CHAN_WIDTH_160)
 385                 flags |= ieee80211_chandef_downgrade(&chandef);
 386         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 387             chandef.width > NL80211_CHAN_WIDTH_20)
 388                 flags |= ieee80211_chandef_downgrade(&chandef);
 389
 390         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 391                 return 0;
 392
 393         sdata_info(sdata,
 394                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 395                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 396                    chandef.center_freq1, chandef.center_freq2);
 397
 398         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 399                                       IEEE80211_STA_DISABLE_VHT |
 400                                       IEEE80211_STA_DISABLE_40MHZ |
 401                                       IEEE80211_STA_DISABLE_80P80MHZ |
 402                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 403             !cfg80211_chandef_valid(&chandef)) {
 404                 sdata_info(sdata,
 405                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 406                            ifmgd->bssid);
 407                 return -EINVAL;
 408         }
 409
 410         switch (chandef.width) {
 411         case NL80211_CHAN_WIDTH_20_NOHT:
 412         case NL80211_CHAN_WIDTH_20:
 413                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 414                 break;
 415         case NL80211_CHAN_WIDTH_40:
 416                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 417                 break;
 418         case NL80211_CHAN_WIDTH_80:
 419                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 420                 break;
 421         case NL80211_CHAN_WIDTH_80P80:
 422         case NL80211_CHAN_WIDTH_160:
 423                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 424                 break;
 425         default:
 426                 return -EINVAL;
 427         }
 428
 429         if (new_sta_bw > sta->cur_max_bandwidth)
 430                 new_sta_bw = sta->cur_max_bandwidth;
 431
 432         if (new_sta_bw < sta->sta.bandwidth) {
 433                 sta->sta.bandwidth = new_sta_bw;
 434                 rate_control_rate_update(local, sband, sta,
 435                                          IEEE80211_RC_BW_CHANGED);
 436         }
 437
 438         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 439         if (ret) {
 440                 sdata_info(sdata,
 441                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 442                            ifmgd->bssid);
 443                 return ret;
 444         }
 445
 446         if (new_sta_bw > sta->sta.bandwidth) {
 447                 sta->sta.bandwidth = new_sta_bw;
 448                 rate_control_rate_update(local, sband, sta,
 449                                          IEEE80211_RC_BW_CHANGED);
 450         }
 451
 452         return 0;
 453 }
 454
 455 /* frame sending functions */
 456
 457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 458                                 struct sk_buff *skb, u8 ap_ht_param,
 459                                 struct ieee80211_supported_band *sband,
 460                                 struct ieee80211_channel *channel,
 461                                 enum ieee80211_smps_mode smps)
 462 {
 463         u8 *pos;
 464         u32 flags = channel->flags;
 465         u16 cap;
 466         struct ieee80211_sta_ht_cap ht_cap;
 467
 468         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 469
 470         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 471         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 472
 473         /* determine capability flags */
 474         cap = ht_cap.cap;
 475
 476         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 477         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 478                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 479                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 480                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 481                 }
 482                 break;
 483         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 484                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 485                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 486                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 487                 }
 488                 break;
 489         }
 490
 491         /*
 492          * If 40 MHz was disabled associate as though we weren't
 493          * capable of 40 MHz -- some broken APs will never fall
 494          * back to trying to transmit in 20 MHz.
 495          */
 496         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 497                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 498                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 499         }
 500
 501         /* set SM PS mode properly */
 502         cap &= ~IEEE80211_HT_CAP_SM_PS;
 503         switch (smps) {
 504         case IEEE80211_SMPS_AUTOMATIC:
 505         case IEEE80211_SMPS_NUM_MODES:
 506                 WARN_ON(1);
 507         case IEEE80211_SMPS_OFF:
 508                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 509                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 510                 break;
 511         case IEEE80211_SMPS_STATIC:
 512                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 513                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 514                 break;
 515         case IEEE80211_SMPS_DYNAMIC:
 516                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 517                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 518                 break;
 519         }
 520
 521         /* reserve and fill IE */
 522         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 523         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 524 }
 525
 526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 527                                  struct sk_buff *skb,
 528                                  struct ieee80211_supported_band *sband,
 529                                  struct ieee80211_vht_cap *ap_vht_cap)
 530 {
 531         u8 *pos;
 532         u32 cap;
 533         struct ieee80211_sta_vht_cap vht_cap;
 534         u32 mask, ap_bf_sts, our_bf_sts;
 535
 536         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 537
 538         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 539         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 540
 541         /* determine capability flags */
 542         cap = vht_cap.cap;
 543
 544         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 545                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 546                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 547         }
 548
 549         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 550                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 551                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 552         }
 553
 554         /*
 555          * Some APs apparently get confused if our capabilities are better
 556          * than theirs, so restrict what we advertise in the assoc request.
 557          */
 558         if (!(ap_vht_cap->vht_cap_info &
 559                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 560                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 561
 562         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 563
 564         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 565         our_bf_sts = cap & mask;
 566
 567         if (ap_bf_sts < our_bf_sts) {
 568                 cap &= ~mask;
 569                 cap |= ap_bf_sts;
 570         }
 571
 572         /* reserve and fill IE */
 573         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 574         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 575 }
 576
 577 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 578 {
 579         struct ieee80211_local *local = sdata->local;
 580         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 581         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 582         struct sk_buff *skb;
 583         struct ieee80211_mgmt *mgmt;
 584         u8 *pos, qos_info;
 585         size_t offset = 0, noffset;
 586         int i, count, rates_len, supp_rates_len, shift;
 587         u16 capab;
 588         struct ieee80211_supported_band *sband;
 589         struct ieee80211_chanctx_conf *chanctx_conf;
 590         struct ieee80211_channel *chan;
 591         u32 rate_flags, rates = 0;
 592
 593         sdata_assert_lock(sdata);
 594
 595         rcu_read_lock();
 596         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 597         if (WARN_ON(!chanctx_conf)) {
 598                 rcu_read_unlock();
 599                 return;
 600         }
 601         chan = chanctx_conf->def.chan;
 602         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 603         rcu_read_unlock();
 604         sband = local->hw.wiphy->bands[chan->band];
 605         shift = ieee80211_vif_get_shift(&sdata->vif);
 606
 607         if (assoc_data->supp_rates_len) {
 608                 /*
 609                  * Get all rates supported by the device and the AP as
 610                  * some APs don't like getting a superset of their rates
 611                  * in the association request (e.g. D-Link DAP 1353 in
 612                  * b-only mode)...
 613                  */
 614                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 615                                                      assoc_data->supp_rates,
 616                                                      assoc_data->supp_rates_len,
 617                                                      &rates);
 618         } else {
 619                 /*
 620                  * In case AP not provide any supported rates information
 621                  * before association, we send information element(s) with
 622                  * all rates that we support.
 623                  */
 624                 rates_len = 0;
 625                 for (i = 0; i < sband->n_bitrates; i++) {
 626                         if ((rate_flags & sband->bitrates[i].flags)
 627                             != rate_flags)
 628                                 continue;
 629                         rates |= BIT(i);
 630                         rates_len++;
 631                 }
 632         }
 633
 634         skb = alloc_skb(local->hw.extra_tx_headroom +
 635                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 636                         2 + assoc_data->ssid_len + /* SSID */
 637                         4 + rates_len + /* (extended) rates */
 638                         4 + /* power capability */
 639                         2 + 2 * sband->n_channels + /* supported channels */
 640                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 641                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 642                         assoc_data->ie_len + /* extra IEs */
 643                         9, /* WMM */
 644                         GFP_KERNEL);
 645         if (!skb)
 646                 return;
 647
 648         skb_reserve(skb, local->hw.extra_tx_headroom);
 649
 650         capab = WLAN_CAPABILITY_ESS;
 651
 652         if (sband->band == IEEE80211_BAND_2GHZ) {
 653                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 654                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 655                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 656                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 657         }
 658
 659         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 660                 capab |= WLAN_CAPABILITY_PRIVACY;
 661
 662         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 663             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 664                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 665
 666         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 667         memset(mgmt, 0, 24);
 668         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 669         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 670         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 671
 672         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 673                 skb_put(skb, 10);
 674                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 675                                                   IEEE80211_STYPE_REASSOC_REQ);
 676                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 677                 mgmt->u.reassoc_req.listen_interval =
 678                                 cpu_to_le16(local->hw.conf.listen_interval);
 679                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 680                        ETH_ALEN);
 681         } else {
 682                 skb_put(skb, 4);
 683                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 684                                                   IEEE80211_STYPE_ASSOC_REQ);
 685                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 686                 mgmt->u.assoc_req.listen_interval =
 687                                 cpu_to_le16(local->hw.conf.listen_interval);
 688         }
 689
 690         /* SSID */
 691         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 692         *pos++ = WLAN_EID_SSID;
 693         *pos++ = assoc_data->ssid_len;
 694         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 695
 696         /* add all rates which were marked to be used above */
 697         supp_rates_len = rates_len;
 698         if (supp_rates_len > 8)
 699                 supp_rates_len = 8;
 700
 701         pos = skb_put(skb, supp_rates_len + 2);
 702         *pos++ = WLAN_EID_SUPP_RATES;
 703         *pos++ = supp_rates_len;
 704
 705         count = 0;
 706         for (i = 0; i < sband->n_bitrates; i++) {
 707                 if (BIT(i) & rates) {
 708                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 709                                                 5 * (1 << shift));
 710                         *pos++ = (u8) rate;
 711                         if (++count == 8)
 712                                 break;
 713                 }
 714         }
 715
 716         if (rates_len > count) {
 717                 pos = skb_put(skb, rates_len - count + 2);
 718                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 719                 *pos++ = rates_len - count;
 720
 721                 for (i++; i < sband->n_bitrates; i++) {
 722                         if (BIT(i) & rates) {
 723                                 int rate;
 724                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 725                                                     5 * (1 << shift));
 726                                 *pos++ = (u8) rate;
 727                         }
 728                 }
 729         }
 730
 731         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 732                 /* 1. power capabilities */
 733                 pos = skb_put(skb, 4);
 734                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 735                 *pos++ = 2;
 736                 *pos++ = 0; /* min tx power */
 737                  /* max tx power */
 738                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 739
 740                 /* 2. supported channels */
 741                 /* TODO: get this in reg domain format */
 742                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 743                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 744                 *pos++ = 2 * sband->n_channels;
 745                 for (i = 0; i < sband->n_channels; i++) {
 746                         *pos++ = ieee80211_frequency_to_channel(
 747                                         sband->channels[i].center_freq);
 748                         *pos++ = 1; /* one channel in the subband*/
 749                 }
 750         }
 751
 752         /* if present, add any custom IEs that go before HT */
 753         if (assoc_data->ie_len) {
 754                 static const u8 before_ht[] = {
 755                         WLAN_EID_SSID,
 756                         WLAN_EID_SUPP_RATES,
 757                         WLAN_EID_EXT_SUPP_RATES,
 758                         WLAN_EID_PWR_CAPABILITY,
 759                         WLAN_EID_SUPPORTED_CHANNELS,
 760                         WLAN_EID_RSN,
 761                         WLAN_EID_QOS_CAPA,
 762                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 763                         WLAN_EID_MOBILITY_DOMAIN,
 764                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 765                 };
 766                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 767                                              before_ht, ARRAY_SIZE(before_ht),
 768                                              offset);
 769                 pos = skb_put(skb, noffset - offset);
 770                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 771                 offset = noffset;
 772         }
 773
 774         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 775                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 776                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 777
 778         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 779                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 780                                     sband, chan, sdata->smps_mode);
 781
 782         /* if present, add any custom IEs that go before VHT */
 783         if (assoc_data->ie_len) {
 784                 static const u8 before_vht[] = {
 785                         WLAN_EID_SSID,
 786                         WLAN_EID_SUPP_RATES,
 787                         WLAN_EID_EXT_SUPP_RATES,
 788                         WLAN_EID_PWR_CAPABILITY,
 789                         WLAN_EID_SUPPORTED_CHANNELS,
 790                         WLAN_EID_RSN,
 791                         WLAN_EID_QOS_CAPA,
 792                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 793                         WLAN_EID_MOBILITY_DOMAIN,
 794                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 795                         WLAN_EID_HT_CAPABILITY,
 796                         WLAN_EID_BSS_COEX_2040,
 797                         WLAN_EID_EXT_CAPABILITY,
 798                         WLAN_EID_QOS_TRAFFIC_CAPA,
 799                         WLAN_EID_TIM_BCAST_REQ,
 800                         WLAN_EID_INTERWORKING,
 801                 };
 802                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 803                                              before_vht, ARRAY_SIZE(before_vht),
 804                                              offset);
 805                 pos = skb_put(skb, noffset - offset);
 806                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 807                 offset = noffset;
 808         }
 809
 810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 811                 ieee80211_add_vht_ie(sdata, skb, sband,
 812                                      &assoc_data->ap_vht_cap);
 813
 814         /* if present, add any custom non-vendor IEs that go after HT */
 815         if (assoc_data->ie_len) {
 816                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 817                                                     assoc_data->ie_len,
 818                                                     offset);
 819                 pos = skb_put(skb, noffset - offset);
 820                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 821                 offset = noffset;
 822         }
 823
 824         if (assoc_data->wmm) {
 825                 if (assoc_data->uapsd) {
 826                         qos_info = ifmgd->uapsd_queues;
 827                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 828                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 829                 } else {
 830                         qos_info = 0;
 831                 }
 832
 833                 pos = skb_put(skb, 9);
 834                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 835                 *pos++ = 7; /* len */
 836                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 837                 *pos++ = 0x50;
 838                 *pos++ = 0xf2;
 839                 *pos++ = 2; /* WME */
 840                 *pos++ = 0; /* WME info */
 841                 *pos++ = 1; /* WME ver */
 842                 *pos++ = qos_info;
 843         }
 844
 845         /* add any remaining custom (i.e. vendor specific here) IEs */
 846         if (assoc_data->ie_len) {
 847                 noffset = assoc_data->ie_len;
 848                 pos = skb_put(skb, noffset - offset);
 849                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 850         }
 851
 852         drv_mgd_prepare_tx(local, sdata);
 853
 854         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 855         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 856                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 857                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 858         ieee80211_tx_skb(sdata, skb);
 859 }
 860
 861 void ieee80211_send_pspoll(struct ieee80211_local *local,
 862                            struct ieee80211_sub_if_data *sdata)
 863 {
 864         struct ieee80211_pspoll *pspoll;
 865         struct sk_buff *skb;
 866
 867         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 868         if (!skb)
 869                 return;
 870
 871         pspoll = (struct ieee80211_pspoll *) skb->data;
 872         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 873
 874         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 875         ieee80211_tx_skb(sdata, skb);
 876 }
 877
 878 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 879                              struct ieee80211_sub_if_data *sdata,
 880                              int powersave)
 881 {
 882         struct sk_buff *skb;
 883         struct ieee80211_hdr_3addr *nullfunc;
 884         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 885
 886         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 887         if (!skb)
 888                 return;
 889
 890         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 891         if (powersave)
 892                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 893
 894         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 895                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 896
 897         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 898                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 899
 900         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 901                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 902
 903         ieee80211_tx_skb(sdata, skb);
 904 }
 905
 906 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 907                                           struct ieee80211_sub_if_data *sdata)
 908 {
 909         struct sk_buff *skb;
 910         struct ieee80211_hdr *nullfunc;
 911         __le16 fc;
 912
 913         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 914                 return;
 915
 916         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 917         if (!skb)
 918                 return;
 919
 920         skb_reserve(skb, local->hw.extra_tx_headroom);
 921
 922         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 923         memset(nullfunc, 0, 30);
 924         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 925                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 926         nullfunc->frame_control = fc;
 927         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 928         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 929         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 930         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 931
 932         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 933         ieee80211_tx_skb(sdata, skb);
 934 }
 935
 936 /* spectrum management related things */
 937 static void ieee80211_chswitch_work(struct work_struct *work)
 938 {
 939         struct ieee80211_sub_if_data *sdata =
 940                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 941         struct ieee80211_local *local = sdata->local;
 942         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 943         u32 changed = 0;
 944         int ret;
 945
 946         if (!ieee80211_sdata_running(sdata))
 947                 return;
 948
 949         sdata_lock(sdata);
 950         if (!ifmgd->associated)
 951                 goto out;
 952
 953         mutex_lock(&local->mtx);
 954         ret = ieee80211_vif_change_channel(sdata, &changed);
 955         mutex_unlock(&local->mtx);
 956         if (ret) {
 957                 sdata_info(sdata,
 958                            "vif channel switch failed, disconnecting\n");
 959                 ieee80211_queue_work(&sdata->local->hw,
 960                                      &ifmgd->csa_connection_drop_work);
 961                 goto out;
 962         }
 963
 964         if (!local->use_chanctx) {
 965                 local->_oper_chandef = sdata->csa_chandef;
 966                 /* Call "hw_config" only if doing sw channel switch.
 967                  * Otherwise update the channel directly
 968                  */
 969                 if (!local->ops->channel_switch)
 970                         ieee80211_hw_config(local, 0);
 971                 else
 972                         local->hw.conf.chandef = local->_oper_chandef;
 973         }
 974
 975         /* XXX: shouldn't really modify cfg80211-owned data! */
 976         ifmgd->associated->channel = sdata->csa_chandef.chan;
 977
 978         ieee80211_bss_info_change_notify(sdata, changed);
 979
 980         mutex_lock(&local->mtx);
 981         sdata->vif.csa_active = false;
 982         /* XXX: wait for a beacon first? */
 983         if (sdata->csa_block_tx) {
 984                 ieee80211_wake_vif_queues(local, sdata,
 985                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 986                 sdata->csa_block_tx = false;
 987         }
 988         mutex_unlock(&local->mtx);
 989
 990         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 991
 992         ieee80211_sta_reset_beacon_monitor(sdata);
 993         ieee80211_sta_reset_conn_monitor(sdata);
 994
 995 out:
 996         sdata_unlock(sdata);
 997 }
 998
 999 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1000 {
1001         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1002         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1003
1004         trace_api_chswitch_done(sdata, success);
1005         if (!success) {
1006                 sdata_info(sdata,
1007                            "driver channel switch failed, disconnecting\n");
1008                 ieee80211_queue_work(&sdata->local->hw,
1009                                      &ifmgd->csa_connection_drop_work);
1010         } else {
1011                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1012         }
1013 }
1014 EXPORT_SYMBOL(ieee80211_chswitch_done);
1015
1016 static void ieee80211_chswitch_timer(unsigned long data)
1017 {
1018         struct ieee80211_sub_if_data *sdata =
1019                 (struct ieee80211_sub_if_data *) data;
1020
1021         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1022 }
1023
1024 static void
1025 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1026                                  u64 timestamp, struct ieee802_11_elems *elems,
1027                                  bool beacon)
1028 {
1029         struct ieee80211_local *local = sdata->local;
1030         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1031         struct cfg80211_bss *cbss = ifmgd->associated;
1032         struct ieee80211_chanctx *chanctx;
1033         enum ieee80211_band current_band;
1034         struct ieee80211_csa_ie csa_ie;
1035         int res;
1036
1037         sdata_assert_lock(sdata);
1038
1039         if (!cbss)
1040                 return;
1041
1042         if (local->scanning)
1043                 return;
1044
1045         /* disregard subsequent announcements if we are already processing */
1046         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1047                 return;
1048
1049         current_band = cbss->channel->band;
1050         memset(&csa_ie, 0, sizeof(csa_ie));
1051         res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1052                                            ifmgd->flags,
1053                                            ifmgd->associated->bssid, &csa_ie);
1054         if (res < 0)
1055                 ieee80211_queue_work(&local->hw,
1056                                      &ifmgd->csa_connection_drop_work);
1057         if (res)
1058                 return;
1059
1060         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1061                                      IEEE80211_CHAN_DISABLED)) {
1062                 sdata_info(sdata,
1063                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1064                            ifmgd->associated->bssid,
1065                            csa_ie.chandef.chan->center_freq,
1066                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1067                            csa_ie.chandef.center_freq2);
1068                 ieee80211_queue_work(&local->hw,
1069                                      &ifmgd->csa_connection_drop_work);
1070                 return;
1071         }
1072
1073         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1074
1075         mutex_lock(&local->chanctx_mtx);
1076         if (local->use_chanctx) {
1077                 u32 num_chanctx = 0;
1078                 list_for_each_entry(chanctx, &local->chanctx_list, list)
1079                        num_chanctx++;
1080
1081                 if (num_chanctx > 1 ||
1082                     !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1083                         sdata_info(sdata,
1084                                    "not handling chan-switch with channel contexts\n");
1085                         ieee80211_queue_work(&local->hw,
1086                                              &ifmgd->csa_connection_drop_work);
1087                         mutex_unlock(&local->chanctx_mtx);
1088                         return;
1089                 }
1090         }
1091
1092         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1093                 ieee80211_queue_work(&local->hw,
1094                                      &ifmgd->csa_connection_drop_work);
1095                 mutex_unlock(&local->chanctx_mtx);
1096                 return;
1097         }
1098         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1099                                struct ieee80211_chanctx, conf);
1100         if (ieee80211_chanctx_refcount(local, chanctx) > 1) {
1101                 sdata_info(sdata,
1102                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1103                 ieee80211_queue_work(&local->hw,
1104                                      &ifmgd->csa_connection_drop_work);
1105                 mutex_unlock(&local->chanctx_mtx);
1106                 return;
1107         }
1108         mutex_unlock(&local->chanctx_mtx);
1109
1110         sdata->csa_chandef = csa_ie.chandef;
1111
1112         mutex_lock(&local->mtx);
1113         sdata->vif.csa_active = true;
1114         sdata->csa_block_tx = csa_ie.mode;
1115
1116         if (sdata->csa_block_tx)
1117                 ieee80211_stop_vif_queues(local, sdata,
1118                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1119         mutex_unlock(&local->mtx);
1120
1121         if (local->ops->channel_switch) {
1122                 /* use driver's channel switch callback */
1123                 struct ieee80211_channel_switch ch_switch = {
1124                         .timestamp = timestamp,
1125                         .block_tx = csa_ie.mode,
1126                         .chandef = csa_ie.chandef,
1127                         .count = csa_ie.count,
1128                 };
1129
1130                 drv_channel_switch(local, &ch_switch);
1131                 return;
1132         }
1133
1134         /* channel switch handled in software */
1135         if (csa_ie.count <= 1)
1136                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1137         else
1138                 mod_timer(&ifmgd->chswitch_timer,
1139                           TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1140 }
1141
1142 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1143                                        struct ieee80211_channel *channel,
1144                                        const u8 *country_ie, u8 country_ie_len,
1145                                        const u8 *pwr_constr_elem)
1146 {
1147         struct ieee80211_country_ie_triplet *triplet;
1148         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1149         int i, chan_pwr, chan_increment, new_ap_level;
1150         bool have_chan_pwr = false;
1151
1152         /* Invalid IE */
1153         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1154                 return 0;
1155
1156         triplet = (void *)(country_ie + 3);
1157         country_ie_len -= 3;
1158
1159         switch (channel->band) {
1160         default:
1161                 WARN_ON_ONCE(1);
1162                 /* fall through */
1163         case IEEE80211_BAND_2GHZ:
1164         case IEEE80211_BAND_60GHZ:
1165                 chan_increment = 1;
1166                 break;
1167         case IEEE80211_BAND_5GHZ:
1168                 chan_increment = 4;
1169                 break;
1170         }
1171
1172         /* find channel */
1173         while (country_ie_len >= 3) {
1174                 u8 first_channel = triplet->chans.first_channel;
1175
1176                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1177                         goto next;
1178
1179                 for (i = 0; i < triplet->chans.num_channels; i++) {
1180                         if (first_channel + i * chan_increment == chan) {
1181                                 have_chan_pwr = true;
1182                                 chan_pwr = triplet->chans.max_power;
1183                                 break;
1184                         }
1185                 }
1186                 if (have_chan_pwr)
1187                         break;
1188
1189  next:
1190                 triplet++;
1191                 country_ie_len -= 3;
1192         }
1193
1194         if (!have_chan_pwr)
1195                 return 0;
1196
1197         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1198
1199         if (sdata->ap_power_level == new_ap_level)
1200                 return 0;
1201
1202         sdata_info(sdata,
1203                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1204                    new_ap_level, chan_pwr, *pwr_constr_elem,
1205                    sdata->u.mgd.bssid);
1206         sdata->ap_power_level = new_ap_level;
1207         if (__ieee80211_recalc_txpower(sdata))
1208                 return BSS_CHANGED_TXPOWER;
1209         return 0;
1210 }
1211
1212 /* powersave */
1213 static void ieee80211_enable_ps(struct ieee80211_local *local,
1214                                 struct ieee80211_sub_if_data *sdata)
1215 {
1216         struct ieee80211_conf *conf = &local->hw.conf;
1217
1218         /*
1219          * If we are scanning right now then the parameters will
1220          * take effect when scan finishes.
1221          */
1222         if (local->scanning)
1223                 return;
1224
1225         if (conf->dynamic_ps_timeout > 0 &&
1226             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1227                 mod_timer(&local->dynamic_ps_timer, jiffies +
1228                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1229         } else {
1230                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1231                         ieee80211_send_nullfunc(local, sdata, 1);
1232
1233                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1234                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1235                         return;
1236
1237                 conf->flags |= IEEE80211_CONF_PS;
1238                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1239         }
1240 }
1241
1242 static void ieee80211_change_ps(struct ieee80211_local *local)
1243 {
1244         struct ieee80211_conf *conf = &local->hw.conf;
1245
1246         if (local->ps_sdata) {
1247                 ieee80211_enable_ps(local, local->ps_sdata);
1248         } else if (conf->flags & IEEE80211_CONF_PS) {
1249                 conf->flags &= ~IEEE80211_CONF_PS;
1250                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1251                 del_timer_sync(&local->dynamic_ps_timer);
1252                 cancel_work_sync(&local->dynamic_ps_enable_work);
1253         }
1254 }
1255
1256 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1257 {
1258         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1259         struct sta_info *sta = NULL;
1260         bool authorized = false;
1261
1262         if (!mgd->powersave)
1263                 return false;
1264
1265         if (mgd->broken_ap)
1266                 return false;
1267
1268         if (!mgd->associated)
1269                 return false;
1270
1271         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1272                 return false;
1273
1274         if (!mgd->have_beacon)
1275                 return false;
1276
1277         rcu_read_lock();
1278         sta = sta_info_get(sdata, mgd->bssid);
1279         if (sta)
1280                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1281         rcu_read_unlock();
1282
1283         return authorized;
1284 }
1285
1286 /* need to hold RTNL or interface lock */
1287 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1288 {
1289         struct ieee80211_sub_if_data *sdata, *found = NULL;
1290         int count = 0;
1291         int timeout;
1292
1293         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1294                 local->ps_sdata = NULL;
1295                 return;
1296         }
1297
1298         list_for_each_entry(sdata, &local->interfaces, list) {
1299                 if (!ieee80211_sdata_running(sdata))
1300                         continue;
1301                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1302                         /* If an AP vif is found, then disable PS
1303                          * by setting the count to zero thereby setting
1304                          * ps_sdata to NULL.
1305                          */
1306                         count = 0;
1307                         break;
1308                 }
1309                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1310                         continue;
1311                 found = sdata;
1312                 count++;
1313         }
1314
1315         if (count == 1 && ieee80211_powersave_allowed(found)) {
1316                 s32 beaconint_us;
1317
1318                 if (latency < 0)
1319                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1320
1321                 beaconint_us = ieee80211_tu_to_usec(
1322                                         found->vif.bss_conf.beacon_int);
1323
1324                 timeout = local->dynamic_ps_forced_timeout;
1325                 if (timeout < 0) {
1326                         /*
1327                          * Go to full PSM if the user configures a very low
1328                          * latency requirement.
1329                          * The 2000 second value is there for compatibility
1330                          * until the PM_QOS_NETWORK_LATENCY is configured
1331                          * with real values.
1332                          */
1333                         if (latency > (1900 * USEC_PER_MSEC) &&
1334                             latency != (2000 * USEC_PER_SEC))
1335                                 timeout = 0;
1336                         else
1337                                 timeout = 100;
1338                 }
1339                 local->hw.conf.dynamic_ps_timeout = timeout;
1340
1341                 if (beaconint_us > latency) {
1342                         local->ps_sdata = NULL;
1343                 } else {
1344                         int maxslp = 1;
1345                         u8 dtimper = found->u.mgd.dtim_period;
1346
1347                         /* If the TIM IE is invalid, pretend the value is 1 */
1348                         if (!dtimper)
1349                                 dtimper = 1;
1350                         else if (dtimper > 1)
1351                                 maxslp = min_t(int, dtimper,
1352                                                     latency / beaconint_us);
1353
1354                         local->hw.conf.max_sleep_period = maxslp;
1355                         local->hw.conf.ps_dtim_period = dtimper;
1356                         local->ps_sdata = found;
1357                 }
1358         } else {
1359                 local->ps_sdata = NULL;
1360         }
1361
1362         ieee80211_change_ps(local);
1363 }
1364
1365 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1366 {
1367         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1368
1369         if (sdata->vif.bss_conf.ps != ps_allowed) {
1370                 sdata->vif.bss_conf.ps = ps_allowed;
1371                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1372         }
1373 }
1374
1375 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1376 {
1377         struct ieee80211_local *local =
1378                 container_of(work, struct ieee80211_local,
1379                              dynamic_ps_disable_work);
1380
1381         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1382                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1383                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1384         }
1385
1386         ieee80211_wake_queues_by_reason(&local->hw,
1387                                         IEEE80211_MAX_QUEUE_MAP,
1388                                         IEEE80211_QUEUE_STOP_REASON_PS,
1389                                         false);
1390 }
1391
1392 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1393 {
1394         struct ieee80211_local *local =
1395                 container_of(work, struct ieee80211_local,
1396                              dynamic_ps_enable_work);
1397         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1398         struct ieee80211_if_managed *ifmgd;
1399         unsigned long flags;
1400         int q;
1401
1402         /* can only happen when PS was just disabled anyway */
1403         if (!sdata)
1404                 return;
1405
1406         ifmgd = &sdata->u.mgd;
1407
1408         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1409                 return;
1410
1411         if (local->hw.conf.dynamic_ps_timeout > 0) {
1412                 /* don't enter PS if TX frames are pending */
1413                 if (drv_tx_frames_pending(local)) {
1414                         mod_timer(&local->dynamic_ps_timer, jiffies +
1415                                   msecs_to_jiffies(
1416                                   local->hw.conf.dynamic_ps_timeout));
1417                         return;
1418                 }
1419
1420                 /*
1421                  * transmission can be stopped by others which leads to
1422                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1423                  * is not the actual idle state.
1424                  */
1425                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1426                 for (q = 0; q < local->hw.queues; q++) {
1427                         if (local->queue_stop_reasons[q]) {
1428                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1429                                                        flags);
1430                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1431                                           msecs_to_jiffies(
1432                                           local->hw.conf.dynamic_ps_timeout));
1433                                 return;
1434                         }
1435                 }
1436                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1437         }
1438
1439         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1440             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1441                 if (drv_tx_frames_pending(local)) {
1442                         mod_timer(&local->dynamic_ps_timer, jiffies +
1443                                   msecs_to_jiffies(
1444                                   local->hw.conf.dynamic_ps_timeout));
1445                 } else {
1446                         ieee80211_send_nullfunc(local, sdata, 1);
1447                         /* Flush to get the tx status of nullfunc frame */
1448                         ieee80211_flush_queues(local, sdata);
1449                 }
1450         }
1451
1452         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1453               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1454             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1455                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1456                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1457                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1458         }
1459 }
1460
1461 void ieee80211_dynamic_ps_timer(unsigned long data)
1462 {
1463         struct ieee80211_local *local = (void *) data;
1464
1465         if (local->quiescing || local->suspended)
1466                 return;
1467
1468         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1469 }
1470
1471 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1472 {
1473         struct delayed_work *delayed_work =
1474                 container_of(work, struct delayed_work, work);
1475         struct ieee80211_sub_if_data *sdata =
1476                 container_of(delayed_work, struct ieee80211_sub_if_data,
1477                              dfs_cac_timer_work);
1478         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1479
1480         mutex_lock(&sdata->local->mtx);
1481         if (sdata->wdev.cac_started) {
1482                 ieee80211_vif_release_channel(sdata);
1483                 cfg80211_cac_event(sdata->dev, &chandef,
1484                                    NL80211_RADAR_CAC_FINISHED,
1485                                    GFP_KERNEL);
1486         }
1487         mutex_unlock(&sdata->local->mtx);
1488 }
1489
1490 /* MLME */
1491 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1492                                      struct ieee80211_sub_if_data *sdata,
1493                                      const u8 *wmm_param, size_t wmm_param_len)
1494 {
1495         struct ieee80211_tx_queue_params params;
1496         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1497         size_t left;
1498         int count;
1499         const u8 *pos;
1500         u8 uapsd_queues = 0;
1501
1502         if (!local->ops->conf_tx)
1503                 return false;
1504
1505         if (local->hw.queues < IEEE80211_NUM_ACS)
1506                 return false;
1507
1508         if (!wmm_param)
1509                 return false;
1510
1511         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1512                 return false;
1513
1514         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1515                 uapsd_queues = ifmgd->uapsd_queues;
1516
1517         count = wmm_param[6] & 0x0f;
1518         if (count == ifmgd->wmm_last_param_set)
1519                 return false;
1520         ifmgd->wmm_last_param_set = count;
1521
1522         pos = wmm_param + 8;
1523         left = wmm_param_len - 8;
1524
1525         memset(&params, 0, sizeof(params));
1526
1527         sdata->wmm_acm = 0;
1528         for (; left >= 4; left -= 4, pos += 4) {
1529                 int aci = (pos[0] >> 5) & 0x03;
1530                 int acm = (pos[0] >> 4) & 0x01;
1531                 bool uapsd = false;
1532                 int queue;
1533
1534                 switch (aci) {
1535                 case 1: /* AC_BK */
1536                         queue = 3;
1537                         if (acm)
1538                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1539                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1540                                 uapsd = true;
1541                         break;
1542                 case 2: /* AC_VI */
1543                         queue = 1;
1544                         if (acm)
1545                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1546                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1547                                 uapsd = true;
1548                         break;
1549                 case 3: /* AC_VO */
1550                         queue = 0;
1551                         if (acm)
1552                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1553                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1554                                 uapsd = true;
1555                         break;
1556                 case 0: /* AC_BE */
1557                 default:
1558                         queue = 2;
1559                         if (acm)
1560                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1561                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1562                                 uapsd = true;
1563                         break;
1564                 }
1565
1566                 params.aifs = pos[0] & 0x0f;
1567                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1568                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1569                 params.txop = get_unaligned_le16(pos + 2);
1570                 params.acm = acm;
1571                 params.uapsd = uapsd;
1572
1573                 mlme_dbg(sdata,
1574                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1575                          queue, aci, acm,
1576                          params.aifs, params.cw_min, params.cw_max,
1577                          params.txop, params.uapsd);
1578                 sdata->tx_conf[queue] = params;
1579                 if (drv_conf_tx(local, sdata, queue, &params))
1580                         sdata_err(sdata,
1581                                   "failed to set TX queue parameters for queue %d\n",
1582                                   queue);
1583         }
1584
1585         /* enable WMM or activate new settings */
1586         sdata->vif.bss_conf.qos = true;
1587         return true;
1588 }
1589
1590 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1591 {
1592         lockdep_assert_held(&sdata->local->mtx);
1593
1594         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1595         ieee80211_run_deferred_scan(sdata->local);
1596 }
1597
1598 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1599 {
1600         mutex_lock(&sdata->local->mtx);
1601         __ieee80211_stop_poll(sdata);
1602         mutex_unlock(&sdata->local->mtx);
1603 }
1604
1605 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1606                                            u16 capab, bool erp_valid, u8 erp)
1607 {
1608         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1609         u32 changed = 0;
1610         bool use_protection;
1611         bool use_short_preamble;
1612         bool use_short_slot;
1613
1614         if (erp_valid) {
1615                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1616                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1617         } else {
1618                 use_protection = false;
1619                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1620         }
1621
1622         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1623         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1624                 use_short_slot = true;
1625
1626         if (use_protection != bss_conf->use_cts_prot) {
1627                 bss_conf->use_cts_prot = use_protection;
1628                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1629         }
1630
1631         if (use_short_preamble != bss_conf->use_short_preamble) {
1632                 bss_conf->use_short_preamble = use_short_preamble;
1633                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1634         }
1635
1636         if (use_short_slot != bss_conf->use_short_slot) {
1637                 bss_conf->use_short_slot = use_short_slot;
1638                 changed |= BSS_CHANGED_ERP_SLOT;
1639         }
1640
1641         return changed;
1642 }
1643
1644 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1645                                      struct cfg80211_bss *cbss,
1646                                      u32 bss_info_changed)
1647 {
1648         struct ieee80211_bss *bss = (void *)cbss->priv;
1649         struct ieee80211_local *local = sdata->local;
1650         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1651
1652         bss_info_changed |= BSS_CHANGED_ASSOC;
1653         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1654                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1655
1656         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1657                 beacon_loss_count * bss_conf->beacon_int));
1658
1659         sdata->u.mgd.associated = cbss;
1660         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1661
1662         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1663
1664         if (sdata->vif.p2p) {
1665                 const struct cfg80211_bss_ies *ies;
1666
1667                 rcu_read_lock();
1668                 ies = rcu_dereference(cbss->ies);
1669                 if (ies) {
1670                         int ret;
1671
1672                         ret = cfg80211_get_p2p_attr(
1673                                         ies->data, ies->len,
1674                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1675                                         (u8 *) &bss_conf->p2p_noa_attr,
1676                                         sizeof(bss_conf->p2p_noa_attr));
1677                         if (ret >= 2) {
1678                                 sdata->u.mgd.p2p_noa_index =
1679                                         bss_conf->p2p_noa_attr.index;
1680                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1681                         }
1682                 }
1683                 rcu_read_unlock();
1684         }
1685
1686         /* just to be sure */
1687         ieee80211_stop_poll(sdata);
1688
1689         ieee80211_led_assoc(local, 1);
1690
1691         if (sdata->u.mgd.have_beacon) {
1692                 /*
1693                  * If the AP is buggy we may get here with no DTIM period
1694                  * known, so assume it's 1 which is the only safe assumption
1695                  * in that case, although if the TIM IE is broken powersave
1696                  * probably just won't work at all.
1697                  */
1698                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1699                 bss_conf->beacon_rate = bss->beacon_rate;
1700                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1701         } else {
1702                 bss_conf->beacon_rate = NULL;
1703                 bss_conf->dtim_period = 0;
1704         }
1705
1706         bss_conf->assoc = 1;
1707
1708         /* Tell the driver to monitor connection quality (if supported) */
1709         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1710             bss_conf->cqm_rssi_thold)
1711                 bss_info_changed |= BSS_CHANGED_CQM;
1712
1713         /* Enable ARP filtering */
1714         if (bss_conf->arp_addr_cnt)
1715                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1716
1717         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1718
1719         mutex_lock(&local->iflist_mtx);
1720         ieee80211_recalc_ps(local, -1);
1721         mutex_unlock(&local->iflist_mtx);
1722
1723         ieee80211_recalc_smps(sdata);
1724         ieee80211_recalc_ps_vif(sdata);
1725
1726         netif_carrier_on(sdata->dev);
1727 }
1728
1729 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1730                                    u16 stype, u16 reason, bool tx,
1731                                    u8 *frame_buf)
1732 {
1733         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1734         struct ieee80211_local *local = sdata->local;
1735         u32 changed = 0;
1736
1737         sdata_assert_lock(sdata);
1738
1739         if (WARN_ON_ONCE(tx && !frame_buf))
1740                 return;
1741
1742         if (WARN_ON(!ifmgd->associated))
1743                 return;
1744
1745         ieee80211_stop_poll(sdata);
1746
1747         ifmgd->associated = NULL;
1748         netif_carrier_off(sdata->dev);
1749
1750         /*
1751          * if we want to get out of ps before disassoc (why?) we have
1752          * to do it before sending disassoc, as otherwise the null-packet
1753          * won't be valid.
1754          */
1755         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1756                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1757                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1758         }
1759         local->ps_sdata = NULL;
1760
1761         /* disable per-vif ps */
1762         ieee80211_recalc_ps_vif(sdata);
1763
1764         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1765         if (tx)
1766                 ieee80211_flush_queues(local, sdata);
1767
1768         /* deauthenticate/disassociate now */
1769         if (tx || frame_buf)
1770                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1771                                                reason, tx, frame_buf);
1772
1773         /* flush out frame */
1774         if (tx)
1775                 ieee80211_flush_queues(local, sdata);
1776
1777         /* clear bssid only after building the needed mgmt frames */
1778         memset(ifmgd->bssid, 0, ETH_ALEN);
1779
1780         /* remove AP and TDLS peers */
1781         sta_info_flush(sdata);
1782
1783         /* finally reset all BSS / config parameters */
1784         changed |= ieee80211_reset_erp_info(sdata);
1785
1786         ieee80211_led_assoc(local, 0);
1787         changed |= BSS_CHANGED_ASSOC;
1788         sdata->vif.bss_conf.assoc = false;
1789
1790         ifmgd->p2p_noa_index = -1;
1791         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1792                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1793
1794         /* on the next assoc, re-program HT/VHT parameters */
1795         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1796         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1797         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1798         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1799
1800         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1801
1802         del_timer_sync(&local->dynamic_ps_timer);
1803         cancel_work_sync(&local->dynamic_ps_enable_work);
1804
1805         /* Disable ARP filtering */
1806         if (sdata->vif.bss_conf.arp_addr_cnt)
1807                 changed |= BSS_CHANGED_ARP_FILTER;
1808
1809         sdata->vif.bss_conf.qos = false;
1810         changed |= BSS_CHANGED_QOS;
1811
1812         /* The BSSID (not really interesting) and HT changed */
1813         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1814         ieee80211_bss_info_change_notify(sdata, changed);
1815
1816         /* disassociated - set to defaults now */
1817         ieee80211_set_wmm_default(sdata, false);
1818
1819         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1820         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1821         del_timer_sync(&sdata->u.mgd.timer);
1822         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1823
1824         sdata->vif.bss_conf.dtim_period = 0;
1825         sdata->vif.bss_conf.beacon_rate = NULL;
1826
1827         ifmgd->have_beacon = false;
1828
1829         ifmgd->flags = 0;
1830         mutex_lock(&local->mtx);
1831         ieee80211_vif_release_channel(sdata);
1832
1833         sdata->vif.csa_active = false;
1834         if (sdata->csa_block_tx) {
1835                 ieee80211_wake_vif_queues(local, sdata,
1836                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1837                 sdata->csa_block_tx = false;
1838         }
1839         mutex_unlock(&local->mtx);
1840
1841         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1842 }
1843
1844 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1845                              struct ieee80211_hdr *hdr)
1846 {
1847         /*
1848          * We can postpone the mgd.timer whenever receiving unicast frames
1849          * from AP because we know that the connection is working both ways
1850          * at that time. But multicast frames (and hence also beacons) must
1851          * be ignored here, because we need to trigger the timer during
1852          * data idle periods for sending the periodic probe request to the
1853          * AP we're connected to.
1854          */
1855         if (is_multicast_ether_addr(hdr->addr1))
1856                 return;
1857
1858         ieee80211_sta_reset_conn_monitor(sdata);
1859 }
1860
1861 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1862 {
1863         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1864         struct ieee80211_local *local = sdata->local;
1865
1866         mutex_lock(&local->mtx);
1867         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1868                 goto out;
1869
1870         __ieee80211_stop_poll(sdata);
1871
1872         mutex_lock(&local->iflist_mtx);
1873         ieee80211_recalc_ps(local, -1);
1874         mutex_unlock(&local->iflist_mtx);
1875
1876         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1877                 goto out;
1878
1879         /*
1880          * We've received a probe response, but are not sure whether
1881          * we have or will be receiving any beacons or data, so let's
1882          * schedule the timers again, just in case.
1883          */
1884         ieee80211_sta_reset_beacon_monitor(sdata);
1885
1886         mod_timer(&ifmgd->conn_mon_timer,
1887                   round_jiffies_up(jiffies +
1888                                    IEEE80211_CONNECTION_IDLE_TIME));
1889 out:
1890         mutex_unlock(&local->mtx);
1891 }
1892
1893 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1894                              struct ieee80211_hdr *hdr, bool ack)
1895 {
1896         if (!ieee80211_is_data(hdr->frame_control))
1897             return;
1898
1899         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1900             sdata->u.mgd.probe_send_count > 0) {
1901                 if (ack)
1902                         ieee80211_sta_reset_conn_monitor(sdata);
1903                 else
1904                         sdata->u.mgd.nullfunc_failed = true;
1905                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1906                 return;
1907         }
1908
1909         if (ack)
1910                 ieee80211_sta_reset_conn_monitor(sdata);
1911 }
1912
1913 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1914 {
1915         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1916         const u8 *ssid;
1917         u8 *dst = ifmgd->associated->bssid;
1918         u8 unicast_limit = max(1, max_probe_tries - 3);
1919
1920         /*
1921          * Try sending broadcast probe requests for the last three
1922          * probe requests after the first ones failed since some
1923          * buggy APs only support broadcast probe requests.
1924          */
1925         if (ifmgd->probe_send_count >= unicast_limit)
1926                 dst = NULL;
1927
1928         /*
1929          * When the hardware reports an accurate Tx ACK status, it's
1930          * better to send a nullfunc frame instead of a probe request,
1931          * as it will kick us off the AP quickly if we aren't associated
1932          * anymore. The timeout will be reset if the frame is ACKed by
1933          * the AP.
1934          */
1935         ifmgd->probe_send_count++;
1936
1937         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1938                 ifmgd->nullfunc_failed = false;
1939                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1940         } else {
1941                 int ssid_len;
1942
1943                 rcu_read_lock();
1944                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1945                 if (WARN_ON_ONCE(ssid == NULL))
1946                         ssid_len = 0;
1947                 else
1948                         ssid_len = ssid[1];
1949
1950                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1951                                          0, (u32) -1, true, 0,
1952                                          ifmgd->associated->channel, false);
1953                 rcu_read_unlock();
1954         }
1955
1956         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1957         run_again(sdata, ifmgd->probe_timeout);
1958         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1959                 ieee80211_flush_queues(sdata->local, sdata);
1960 }
1961
1962 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1963                                    bool beacon)
1964 {
1965         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1966         bool already = false;
1967
1968         if (!ieee80211_sdata_running(sdata))
1969                 return;
1970
1971         sdata_lock(sdata);
1972
1973         if (!ifmgd->associated)
1974                 goto out;
1975
1976         mutex_lock(&sdata->local->mtx);
1977
1978         if (sdata->local->tmp_channel || sdata->local->scanning) {
1979                 mutex_unlock(&sdata->local->mtx);
1980                 goto out;
1981         }
1982
1983         if (beacon) {
1984                 mlme_dbg_ratelimited(sdata,
1985                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
1986                                      beacon_loss_count);
1987
1988                 ieee80211_cqm_rssi_notify(&sdata->vif,
1989                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1990                                           GFP_KERNEL);
1991         }
1992
1993         /*
1994          * The driver/our work has already reported this event or the
1995          * connection monitoring has kicked in and we have already sent
1996          * a probe request. Or maybe the AP died and the driver keeps
1997          * reporting until we disassociate...
1998          *
1999          * In either case we have to ignore the current call to this
2000          * function (except for setting the correct probe reason bit)
2001          * because otherwise we would reset the timer every time and
2002          * never check whether we received a probe response!
2003          */
2004         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2005                 already = true;
2006
2007         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2008
2009         mutex_unlock(&sdata->local->mtx);
2010
2011         if (already)
2012                 goto out;
2013
2014         mutex_lock(&sdata->local->iflist_mtx);
2015         ieee80211_recalc_ps(sdata->local, -1);
2016         mutex_unlock(&sdata->local->iflist_mtx);
2017
2018         ifmgd->probe_send_count = 0;
2019         ieee80211_mgd_probe_ap_send(sdata);
2020  out:
2021         sdata_unlock(sdata);
2022 }
2023
2024 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2025                                           struct ieee80211_vif *vif)
2026 {
2027         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2028         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2029         struct cfg80211_bss *cbss;
2030         struct sk_buff *skb;
2031         const u8 *ssid;
2032         int ssid_len;
2033
2034         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2035                 return NULL;
2036
2037         sdata_assert_lock(sdata);
2038
2039         if (ifmgd->associated)
2040                 cbss = ifmgd->associated;
2041         else if (ifmgd->auth_data)
2042                 cbss = ifmgd->auth_data->bss;
2043         else if (ifmgd->assoc_data)
2044                 cbss = ifmgd->assoc_data->bss;
2045         else
2046                 return NULL;
2047
2048         rcu_read_lock();
2049         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2050         if (WARN_ON_ONCE(ssid == NULL))
2051                 ssid_len = 0;
2052         else
2053                 ssid_len = ssid[1];
2054
2055         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2056                                         (u32) -1, cbss->channel,
2057                                         ssid + 2, ssid_len,
2058                                         NULL, 0, true);
2059         rcu_read_unlock();
2060
2061         return skb;
2062 }
2063 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2064
2065 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2066 {
2067         struct ieee80211_local *local = sdata->local;
2068         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2069         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2070
2071         sdata_lock(sdata);
2072         if (!ifmgd->associated) {
2073                 sdata_unlock(sdata);
2074                 return;
2075         }
2076
2077         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2078                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2079                                true, frame_buf);
2080         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2081
2082         mutex_lock(&local->mtx);
2083         sdata->vif.csa_active = false;
2084         if (sdata->csa_block_tx) {
2085                 ieee80211_wake_vif_queues(local, sdata,
2086                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2087                 sdata->csa_block_tx = false;
2088         }
2089         mutex_unlock(&local->mtx);
2090
2091         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2092                               IEEE80211_DEAUTH_FRAME_LEN);
2093         sdata_unlock(sdata);
2094 }
2095
2096 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2097 {
2098         struct ieee80211_sub_if_data *sdata =
2099                 container_of(work, struct ieee80211_sub_if_data,
2100                              u.mgd.beacon_connection_loss_work);
2101         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2102         struct sta_info *sta;
2103
2104         if (ifmgd->associated) {
2105                 rcu_read_lock();
2106                 sta = sta_info_get(sdata, ifmgd->bssid);
2107                 if (sta)
2108                         sta->beacon_loss_count++;
2109                 rcu_read_unlock();
2110         }
2111
2112         if (ifmgd->connection_loss) {
2113                 sdata_info(sdata, "Connection to AP %pM lost\n",
2114                            ifmgd->bssid);
2115                 __ieee80211_disconnect(sdata);
2116         } else {
2117                 ieee80211_mgd_probe_ap(sdata, true);
2118         }
2119 }
2120
2121 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2122 {
2123         struct ieee80211_sub_if_data *sdata =
2124                 container_of(work, struct ieee80211_sub_if_data,
2125                              u.mgd.csa_connection_drop_work);
2126
2127         __ieee80211_disconnect(sdata);
2128 }
2129
2130 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2131 {
2132         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2133         struct ieee80211_hw *hw = &sdata->local->hw;
2134
2135         trace_api_beacon_loss(sdata);
2136
2137         sdata->u.mgd.connection_loss = false;
2138         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2139 }
2140 EXPORT_SYMBOL(ieee80211_beacon_loss);
2141
2142 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2143 {
2144         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2145         struct ieee80211_hw *hw = &sdata->local->hw;
2146
2147         trace_api_connection_loss(sdata);
2148
2149         sdata->u.mgd.connection_loss = true;
2150         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2151 }
2152 EXPORT_SYMBOL(ieee80211_connection_loss);
2153
2154
2155 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2156                                         bool assoc)
2157 {
2158         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2159
2160         sdata_assert_lock(sdata);
2161
2162         if (!assoc) {
2163                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2164
2165                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2166                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2167                 sdata->u.mgd.flags = 0;
2168                 mutex_lock(&sdata->local->mtx);
2169                 ieee80211_vif_release_channel(sdata);
2170                 mutex_unlock(&sdata->local->mtx);
2171         }
2172
2173         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2174         kfree(auth_data);
2175         sdata->u.mgd.auth_data = NULL;
2176 }
2177
2178 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2179                                      struct ieee80211_mgmt *mgmt, size_t len)
2180 {
2181         struct ieee80211_local *local = sdata->local;
2182         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2183         u8 *pos;
2184         struct ieee802_11_elems elems;
2185         u32 tx_flags = 0;
2186
2187         pos = mgmt->u.auth.variable;
2188         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2189         if (!elems.challenge)
2190                 return;
2191         auth_data->expected_transaction = 4;
2192         drv_mgd_prepare_tx(sdata->local, sdata);
2193         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2194                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2195                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2196         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2197                             elems.challenge - 2, elems.challenge_len + 2,
2198                             auth_data->bss->bssid, auth_data->bss->bssid,
2199                             auth_data->key, auth_data->key_len,
2200                             auth_data->key_idx, tx_flags);
2201 }
2202
2203 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2204                                    struct ieee80211_mgmt *mgmt, size_t len)
2205 {
2206         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2207         u8 bssid[ETH_ALEN];
2208         u16 auth_alg, auth_transaction, status_code;
2209         struct sta_info *sta;
2210
2211         sdata_assert_lock(sdata);
2212
2213         if (len < 24 + 6)
2214                 return;
2215
2216         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2217                 return;
2218
2219         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2220
2221         if (!ether_addr_equal(bssid, mgmt->bssid))
2222                 return;
2223
2224         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2225         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2226         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2227
2228         if (auth_alg != ifmgd->auth_data->algorithm ||
2229             auth_transaction != ifmgd->auth_data->expected_transaction) {
2230                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2231                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2232                            auth_transaction,
2233                            ifmgd->auth_data->expected_transaction);
2234                 return;
2235         }
2236
2237         if (status_code != WLAN_STATUS_SUCCESS) {
2238                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2239                            mgmt->sa, status_code);
2240                 ieee80211_destroy_auth_data(sdata, false);
2241                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2242                 return;
2243         }
2244
2245         switch (ifmgd->auth_data->algorithm) {
2246         case WLAN_AUTH_OPEN:
2247         case WLAN_AUTH_LEAP:
2248         case WLAN_AUTH_FT:
2249         case WLAN_AUTH_SAE:
2250                 break;
2251         case WLAN_AUTH_SHARED_KEY:
2252                 if (ifmgd->auth_data->expected_transaction != 4) {
2253                         ieee80211_auth_challenge(sdata, mgmt, len);
2254                         /* need another frame */
2255                         return;
2256                 }
2257                 break;
2258         default:
2259                 WARN_ONCE(1, "invalid auth alg %d",
2260                           ifmgd->auth_data->algorithm);
2261                 return;
2262         }
2263
2264         sdata_info(sdata, "authenticated\n");
2265         ifmgd->auth_data->done = true;
2266         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2267         ifmgd->auth_data->timeout_started = true;
2268         run_again(sdata, ifmgd->auth_data->timeout);
2269
2270         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2271             ifmgd->auth_data->expected_transaction != 2) {
2272                 /*
2273                  * Report auth frame to user space for processing since another
2274                  * round of Authentication frames is still needed.
2275                  */
2276                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2277                 return;
2278         }
2279
2280         /* move station state to auth */
2281         mutex_lock(&sdata->local->sta_mtx);
2282         sta = sta_info_get(sdata, bssid);
2283         if (!sta) {
2284                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2285                 goto out_err;
2286         }
2287         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2288                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2289                 goto out_err;
2290         }
2291         mutex_unlock(&sdata->local->sta_mtx);
2292
2293         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2294         return;
2295  out_err:
2296         mutex_unlock(&sdata->local->sta_mtx);
2297         /* ignore frame -- wait for timeout */
2298 }
2299
2300 #define case_WLAN(type) \
2301         case WLAN_REASON_##type: return #type
2302
2303 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2304 {
2305         switch (reason_code) {
2306         case_WLAN(UNSPECIFIED);
2307         case_WLAN(PREV_AUTH_NOT_VALID);
2308         case_WLAN(DEAUTH_LEAVING);
2309         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2310         case_WLAN(DISASSOC_AP_BUSY);
2311         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2312         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2313         case_WLAN(DISASSOC_STA_HAS_LEFT);
2314         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2315         case_WLAN(DISASSOC_BAD_POWER);
2316         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2317         case_WLAN(INVALID_IE);
2318         case_WLAN(MIC_FAILURE);
2319         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2320         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2321         case_WLAN(IE_DIFFERENT);
2322         case_WLAN(INVALID_GROUP_CIPHER);
2323         case_WLAN(INVALID_PAIRWISE_CIPHER);
2324         case_WLAN(INVALID_AKMP);
2325         case_WLAN(UNSUPP_RSN_VERSION);
2326         case_WLAN(INVALID_RSN_IE_CAP);
2327         case_WLAN(IEEE8021X_FAILED);
2328         case_WLAN(CIPHER_SUITE_REJECTED);
2329         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2330         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2331         case_WLAN(DISASSOC_LOW_ACK);
2332         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2333         case_WLAN(QSTA_LEAVE_QBSS);
2334         case_WLAN(QSTA_NOT_USE);
2335         case_WLAN(QSTA_REQUIRE_SETUP);
2336         case_WLAN(QSTA_TIMEOUT);
2337         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2338         case_WLAN(MESH_PEER_CANCELED);
2339         case_WLAN(MESH_MAX_PEERS);
2340         case_WLAN(MESH_CONFIG);
2341         case_WLAN(MESH_CLOSE);
2342         case_WLAN(MESH_MAX_RETRIES);
2343         case_WLAN(MESH_CONFIRM_TIMEOUT);
2344         case_WLAN(MESH_INVALID_GTK);
2345         case_WLAN(MESH_INCONSISTENT_PARAM);
2346         case_WLAN(MESH_INVALID_SECURITY);
2347         case_WLAN(MESH_PATH_ERROR);
2348         case_WLAN(MESH_PATH_NOFORWARD);
2349         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2350         case_WLAN(MAC_EXISTS_IN_MBSS);
2351         case_WLAN(MESH_CHAN_REGULATORY);
2352         case_WLAN(MESH_CHAN);
2353         default: return "<unknown>";
2354         }
2355 }
2356
2357 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2358                                      struct ieee80211_mgmt *mgmt, size_t len)
2359 {
2360         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2361         const u8 *bssid = NULL;
2362         u16 reason_code;
2363
2364         sdata_assert_lock(sdata);
2365
2366         if (len < 24 + 2)
2367                 return;
2368
2369         if (!ifmgd->associated ||
2370             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2371                 return;
2372
2373         bssid = ifmgd->associated->bssid;
2374
2375         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2376
2377         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2378                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2379
2380         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2381
2382         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2383 }
2384
2385
2386 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2387                                        struct ieee80211_mgmt *mgmt, size_t len)
2388 {
2389         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2390         u16 reason_code;
2391
2392         sdata_assert_lock(sdata);
2393
2394         if (len < 24 + 2)
2395                 return;
2396
2397         if (!ifmgd->associated ||
2398             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2399                 return;
2400
2401         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2402
2403         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2404                    mgmt->sa, reason_code);
2405
2406         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2407
2408         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2409 }
2410
2411 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2412                                 u8 *supp_rates, unsigned int supp_rates_len,
2413                                 u32 *rates, u32 *basic_rates,
2414                                 bool *have_higher_than_11mbit,
2415                                 int *min_rate, int *min_rate_index,
2416                                 int shift, u32 rate_flags)
2417 {
2418         int i, j;
2419
2420         for (i = 0; i < supp_rates_len; i++) {
2421                 int rate = supp_rates[i] & 0x7f;
2422                 bool is_basic = !!(supp_rates[i] & 0x80);
2423
2424                 if ((rate * 5 * (1 << shift)) > 110)
2425                         *have_higher_than_11mbit = true;
2426
2427                 /*
2428                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2429                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2430                  *
2431                  * Note: Even through the membership selector and the basic
2432                  *       rate flag share the same bit, they are not exactly
2433                  *       the same.
2434                  */
2435                 if (!!(supp_rates[i] & 0x80) &&
2436                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2437                         continue;
2438
2439                 for (j = 0; j < sband->n_bitrates; j++) {
2440                         struct ieee80211_rate *br;
2441                         int brate;
2442
2443                         br = &sband->bitrates[j];
2444                         if ((rate_flags & br->flags) != rate_flags)
2445                                 continue;
2446
2447                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2448                         if (brate == rate) {
2449                                 *rates |= BIT(j);
2450                                 if (is_basic)
2451                                         *basic_rates |= BIT(j);
2452                                 if ((rate * 5) < *min_rate) {
2453                                         *min_rate = rate * 5;
2454                                         *min_rate_index = j;
2455                                 }
2456                                 break;
2457                         }
2458                 }
2459         }
2460 }
2461
2462 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2463                                          bool assoc)
2464 {
2465         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2466
2467         sdata_assert_lock(sdata);
2468
2469         if (!assoc) {
2470                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2471
2472                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2473                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2474                 sdata->u.mgd.flags = 0;
2475                 mutex_lock(&sdata->local->mtx);
2476                 ieee80211_vif_release_channel(sdata);
2477                 mutex_unlock(&sdata->local->mtx);
2478         }
2479
2480         kfree(assoc_data);
2481         sdata->u.mgd.assoc_data = NULL;
2482 }
2483
2484 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2485                                     struct cfg80211_bss *cbss,
2486                                     struct ieee80211_mgmt *mgmt, size_t len)
2487 {
2488         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2489         struct ieee80211_local *local = sdata->local;
2490         struct ieee80211_supported_band *sband;
2491         struct sta_info *sta;
2492         u8 *pos;
2493         u16 capab_info, aid;
2494         struct ieee802_11_elems elems;
2495         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2496         const struct cfg80211_bss_ies *bss_ies = NULL;
2497         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2498         u32 changed = 0;
2499         int err;
2500         bool ret;
2501
2502         /* AssocResp and ReassocResp have identical structure */
2503
2504         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2505         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2506
2507         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2508                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2509                            aid);
2510         aid &= ~(BIT(15) | BIT(14));
2511
2512         ifmgd->broken_ap = false;
2513
2514         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2515                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2516                            aid);
2517                 aid = 0;
2518                 ifmgd->broken_ap = true;
2519         }
2520
2521         pos = mgmt->u.assoc_resp.variable;
2522         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2523
2524         if (!elems.supp_rates) {
2525                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2526                 return false;
2527         }
2528
2529         ifmgd->aid = aid;
2530
2531         /*
2532          * Some APs are erroneously not including some information in their
2533          * (re)association response frames. Try to recover by using the data
2534          * from the beacon or probe response. This seems to afflict mobile
2535          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2536          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2537          */
2538         if ((assoc_data->wmm && !elems.wmm_param) ||
2539             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2540              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2541             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2542              (!elems.vht_cap_elem || !elems.vht_operation))) {
2543                 const struct cfg80211_bss_ies *ies;
2544                 struct ieee802_11_elems bss_elems;
2545
2546                 rcu_read_lock();
2547                 ies = rcu_dereference(cbss->ies);
2548                 if (ies)
2549                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2550                                           GFP_ATOMIC);
2551                 rcu_read_unlock();
2552                 if (!bss_ies)
2553                         return false;
2554
2555                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2556                                        false, &bss_elems);
2557                 if (assoc_data->wmm &&
2558                     !elems.wmm_param && bss_elems.wmm_param) {
2559                         elems.wmm_param = bss_elems.wmm_param;
2560                         sdata_info(sdata,
2561                                    "AP bug: WMM param missing from AssocResp\n");
2562                 }
2563
2564                 /*
2565                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2566                  * have to include the IEs in the (re)association response.
2567                  */
2568                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2569                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2570                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2571                         sdata_info(sdata,
2572                                    "AP bug: HT capability missing from AssocResp\n");
2573                 }
2574                 if (!elems.ht_operation && bss_elems.ht_operation &&
2575                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2576                         elems.ht_operation = bss_elems.ht_operation;
2577                         sdata_info(sdata,
2578                                    "AP bug: HT operation missing from AssocResp\n");
2579                 }
2580                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2581                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2582                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2583                         sdata_info(sdata,
2584                                    "AP bug: VHT capa missing from AssocResp\n");
2585                 }
2586                 if (!elems.vht_operation && bss_elems.vht_operation &&
2587                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2588                         elems.vht_operation = bss_elems.vht_operation;
2589                         sdata_info(sdata,
2590                                    "AP bug: VHT operation missing from AssocResp\n");
2591                 }
2592         }
2593
2594         /*
2595          * We previously checked these in the beacon/probe response, so
2596          * they should be present here. This is just a safety net.
2597          */
2598         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2599             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2600                 sdata_info(sdata,
2601                            "HT AP is missing WMM params or HT capability/operation\n");
2602                 ret = false;
2603                 goto out;
2604         }
2605
2606         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2607             (!elems.vht_cap_elem || !elems.vht_operation)) {
2608                 sdata_info(sdata,
2609                            "VHT AP is missing VHT capability/operation\n");
2610                 ret = false;
2611                 goto out;
2612         }
2613
2614         mutex_lock(&sdata->local->sta_mtx);
2615         /*
2616          * station info was already allocated and inserted before
2617          * the association and should be available to us
2618          */
2619         sta = sta_info_get(sdata, cbss->bssid);
2620         if (WARN_ON(!sta)) {
2621                 mutex_unlock(&sdata->local->sta_mtx);
2622                 ret = false;
2623                 goto out;
2624         }
2625
2626         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2627
2628         /* Set up internal HT/VHT capabilities */
2629         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2630                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2631                                                   elems.ht_cap_elem, sta);
2632
2633         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2634                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2635                                                     elems.vht_cap_elem, sta);
2636
2637         /*
2638          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2639          * in their association response, so ignore that data for our own
2640          * configuration. If it changed since the last beacon, we'll get the
2641          * next beacon and update then.
2642          */
2643
2644         /*
2645          * If an operating mode notification IE is present, override the
2646          * NSS calculation (that would be done in rate_control_rate_init())
2647          * and use the # of streams from that element.
2648          */
2649         if (elems.opmode_notif &&
2650             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2651                 u8 nss;
2652
2653                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2654                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2655                 nss += 1;
2656                 sta->sta.rx_nss = nss;
2657         }
2658
2659         rate_control_rate_init(sta);
2660
2661         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2662                 set_sta_flag(sta, WLAN_STA_MFP);
2663
2664         if (elems.wmm_param)
2665                 set_sta_flag(sta, WLAN_STA_WME);
2666
2667         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2668         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2669                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2670         if (err) {
2671                 sdata_info(sdata,
2672                            "failed to move station %pM to desired state\n",
2673                            sta->sta.addr);
2674                 WARN_ON(__sta_info_destroy(sta));
2675                 mutex_unlock(&sdata->local->sta_mtx);
2676                 ret = false;
2677                 goto out;
2678         }
2679
2680         mutex_unlock(&sdata->local->sta_mtx);
2681
2682         /*
2683          * Always handle WMM once after association regardless
2684          * of the first value the AP uses. Setting -1 here has
2685          * that effect because the AP values is an unsigned
2686          * 4-bit value.
2687          */
2688         ifmgd->wmm_last_param_set = -1;
2689
2690         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2691                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2692                                          elems.wmm_param_len);
2693         else
2694                 ieee80211_set_wmm_default(sdata, false);
2695         changed |= BSS_CHANGED_QOS;
2696
2697         /* set AID and assoc capability,
2698          * ieee80211_set_associated() will tell the driver */
2699         bss_conf->aid = aid;
2700         bss_conf->assoc_capability = capab_info;
2701         ieee80211_set_associated(sdata, cbss, changed);
2702
2703         /*
2704          * If we're using 4-addr mode, let the AP know that we're
2705          * doing so, so that it can create the STA VLAN on its side
2706          */
2707         if (ifmgd->use_4addr)
2708                 ieee80211_send_4addr_nullfunc(local, sdata);
2709
2710         /*
2711          * Start timer to probe the connection to the AP now.
2712          * Also start the timer that will detect beacon loss.
2713          */
2714         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2715         ieee80211_sta_reset_beacon_monitor(sdata);
2716
2717         ret = true;
2718  out:
2719         kfree(bss_ies);
2720         return ret;
2721 }
2722
2723 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2724                                          struct ieee80211_mgmt *mgmt,
2725                                          size_t len)
2726 {
2727         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2728         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2729         u16 capab_info, status_code, aid;
2730         struct ieee802_11_elems elems;
2731         u8 *pos;
2732         bool reassoc;
2733         struct cfg80211_bss *bss;
2734
2735         sdata_assert_lock(sdata);
2736
2737         if (!assoc_data)
2738                 return;
2739         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2740                 return;
2741
2742         /*
2743          * AssocResp and ReassocResp have identical structure, so process both
2744          * of them in this function.
2745          */
2746
2747         if (len < 24 + 6)
2748                 return;
2749
2750         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2751         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2752         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2753         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2754
2755         sdata_info(sdata,
2756                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2757                    reassoc ? "Rea" : "A", mgmt->sa,
2758                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2759
2760         pos = mgmt->u.assoc_resp.variable;
2761         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2762
2763         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2764             elems.timeout_int &&
2765             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2766                 u32 tu, ms;
2767                 tu = le32_to_cpu(elems.timeout_int->value);
2768                 ms = tu * 1024 / 1000;
2769                 sdata_info(sdata,
2770                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2771                            mgmt->sa, tu, ms);
2772                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2773                 assoc_data->timeout_started = true;
2774                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2775                         run_again(sdata, assoc_data->timeout);
2776                 return;
2777         }
2778
2779         bss = assoc_data->bss;
2780
2781         if (status_code != WLAN_STATUS_SUCCESS) {
2782                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2783                            mgmt->sa, status_code);
2784                 ieee80211_destroy_assoc_data(sdata, false);
2785         } else {
2786                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2787                         /* oops -- internal error -- send timeout for now */
2788                         ieee80211_destroy_assoc_data(sdata, false);
2789                         cfg80211_assoc_timeout(sdata->dev, bss);
2790                         return;
2791                 }
2792                 sdata_info(sdata, "associated\n");
2793
2794                 /*
2795                  * destroy assoc_data afterwards, as otherwise an idle
2796                  * recalc after assoc_data is NULL but before associated
2797                  * is set can cause the interface to go idle
2798                  */
2799                 ieee80211_destroy_assoc_data(sdata, true);
2800         }
2801
2802         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2803 }
2804
2805 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2806                                   struct ieee80211_mgmt *mgmt, size_t len,
2807                                   struct ieee80211_rx_status *rx_status,
2808                                   struct ieee802_11_elems *elems)
2809 {
2810         struct ieee80211_local *local = sdata->local;
2811         struct ieee80211_bss *bss;
2812         struct ieee80211_channel *channel;
2813
2814         sdata_assert_lock(sdata);
2815
2816         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2817         if (!channel)
2818                 return;
2819
2820         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2821                                         channel);
2822         if (bss) {
2823                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2824                 ieee80211_rx_bss_put(local, bss);
2825         }
2826 }
2827
2828
2829 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2830                                          struct sk_buff *skb)
2831 {
2832         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2833         struct ieee80211_if_managed *ifmgd;
2834         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2835         size_t baselen, len = skb->len;
2836         struct ieee802_11_elems elems;
2837
2838         ifmgd = &sdata->u.mgd;
2839
2840         sdata_assert_lock(sdata);
2841
2842         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2843                 return; /* ignore ProbeResp to foreign address */
2844
2845         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2846         if (baselen > len)
2847                 return;
2848
2849         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2850                                false, &elems);
2851
2852         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2853
2854         if (ifmgd->associated &&
2855             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2856                 ieee80211_reset_ap_probe(sdata);
2857
2858         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2859             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2860                 /* got probe response, continue with auth */
2861                 sdata_info(sdata, "direct probe responded\n");
2862                 ifmgd->auth_data->tries = 0;
2863                 ifmgd->auth_data->timeout = jiffies;
2864                 ifmgd->auth_data->timeout_started = true;
2865                 run_again(sdata, ifmgd->auth_data->timeout);
2866         }
2867 }
2868
2869 /*
2870  * This is the canonical list of information elements we care about,
2871  * the filter code also gives us all changes to the Microsoft OUI
2872  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2873  *
2874  * We implement beacon filtering in software since that means we can
2875  * avoid processing the frame here and in cfg80211, and userspace
2876  * will not be able to tell whether the hardware supports it or not.
2877  *
2878  * XXX: This list needs to be dynamic -- userspace needs to be able to
2879  *      add items it requires. It also needs to be able to tell us to
2880  *      look out for other vendor IEs.
2881  */
2882 static const u64 care_about_ies =
2883         (1ULL << WLAN_EID_COUNTRY) |
2884         (1ULL << WLAN_EID_ERP_INFO) |
2885         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2886         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2887         (1ULL << WLAN_EID_HT_CAPABILITY) |
2888         (1ULL << WLAN_EID_HT_OPERATION);
2889
2890 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2891                                      struct ieee80211_mgmt *mgmt, size_t len,
2892                                      struct ieee80211_rx_status *rx_status)
2893 {
2894         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2895         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2896         size_t baselen;
2897         struct ieee802_11_elems elems;
2898         struct ieee80211_local *local = sdata->local;
2899         struct ieee80211_chanctx_conf *chanctx_conf;
2900         struct ieee80211_channel *chan;
2901         struct sta_info *sta;
2902         u32 changed = 0;
2903         bool erp_valid;
2904         u8 erp_value = 0;
2905         u32 ncrc;
2906         u8 *bssid;
2907         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2908
2909         sdata_assert_lock(sdata);
2910
2911         /* Process beacon from the current BSS */
2912         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2913         if (baselen > len)
2914                 return;
2915
2916         rcu_read_lock();
2917         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2918         if (!chanctx_conf) {
2919                 rcu_read_unlock();
2920                 return;
2921         }
2922
2923         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2924                 rcu_read_unlock();
2925                 return;
2926         }
2927         chan = chanctx_conf->def.chan;
2928         rcu_read_unlock();
2929
2930         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2931             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2932                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2933                                        len - baselen, false, &elems);
2934
2935                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2936                 if (elems.tim && !elems.parse_error) {
2937                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2938                         ifmgd->dtim_period = tim_ie->dtim_period;
2939                 }
2940                 ifmgd->have_beacon = true;
2941                 ifmgd->assoc_data->need_beacon = false;
2942                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2943                         sdata->vif.bss_conf.sync_tsf =
2944                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2945                         sdata->vif.bss_conf.sync_device_ts =
2946                                 rx_status->device_timestamp;
2947                         if (elems.tim)
2948                                 sdata->vif.bss_conf.sync_dtim_count =
2949                                         elems.tim->dtim_count;
2950                         else
2951                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2952                 }
2953                 /* continue assoc process */
2954                 ifmgd->assoc_data->timeout = jiffies;
2955                 ifmgd->assoc_data->timeout_started = true;
2956                 run_again(sdata, ifmgd->assoc_data->timeout);
2957                 return;
2958         }
2959
2960         if (!ifmgd->associated ||
2961             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2962                 return;
2963         bssid = ifmgd->associated->bssid;
2964
2965         /* Track average RSSI from the Beacon frames of the current AP */
2966         ifmgd->last_beacon_signal = rx_status->signal;
2967         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2968                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2969                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2970                 ifmgd->last_cqm_event_signal = 0;
2971                 ifmgd->count_beacon_signal = 1;
2972                 ifmgd->last_ave_beacon_signal = 0;
2973         } else {
2974                 ifmgd->ave_beacon_signal =
2975                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2976                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2977                          ifmgd->ave_beacon_signal) / 16;
2978                 ifmgd->count_beacon_signal++;
2979         }
2980
2981         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2982             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2983                 int sig = ifmgd->ave_beacon_signal;
2984                 int last_sig = ifmgd->last_ave_beacon_signal;
2985
2986                 /*
2987                  * if signal crosses either of the boundaries, invoke callback
2988                  * with appropriate parameters
2989                  */
2990                 if (sig > ifmgd->rssi_max_thold &&
2991                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2992                         ifmgd->last_ave_beacon_signal = sig;
2993                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2994                 } else if (sig < ifmgd->rssi_min_thold &&
2995                            (last_sig >= ifmgd->rssi_max_thold ||
2996                            last_sig == 0)) {
2997                         ifmgd->last_ave_beacon_signal = sig;
2998                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2999                 }
3000         }
3001
3002         if (bss_conf->cqm_rssi_thold &&
3003             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3004             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3005                 int sig = ifmgd->ave_beacon_signal / 16;
3006                 int last_event = ifmgd->last_cqm_event_signal;
3007                 int thold = bss_conf->cqm_rssi_thold;
3008                 int hyst = bss_conf->cqm_rssi_hyst;
3009                 if (sig < thold &&
3010                     (last_event == 0 || sig < last_event - hyst)) {
3011                         ifmgd->last_cqm_event_signal = sig;
3012                         ieee80211_cqm_rssi_notify(
3013                                 &sdata->vif,
3014                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3015                                 GFP_KERNEL);
3016                 } else if (sig > thold &&
3017                            (last_event == 0 || sig > last_event + hyst)) {
3018                         ifmgd->last_cqm_event_signal = sig;
3019                         ieee80211_cqm_rssi_notify(
3020                                 &sdata->vif,
3021                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3022                                 GFP_KERNEL);
3023                 }
3024         }
3025
3026         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3027                 mlme_dbg_ratelimited(sdata,
3028                                      "cancelling AP probe due to a received beacon\n");
3029                 ieee80211_reset_ap_probe(sdata);
3030         }
3031
3032         /*
3033          * Push the beacon loss detection into the future since
3034          * we are processing a beacon from the AP just now.
3035          */
3036         ieee80211_sta_reset_beacon_monitor(sdata);
3037
3038         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3039         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3040                                           len - baselen, false, &elems,
3041                                           care_about_ies, ncrc);
3042
3043         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3044                 bool directed_tim = ieee80211_check_tim(elems.tim,
3045                                                         elems.tim_len,
3046                                                         ifmgd->aid);
3047                 if (directed_tim) {
3048                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3049                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3050                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3051                                         ieee80211_hw_config(local,
3052                                                             IEEE80211_CONF_CHANGE_PS);
3053                                 }
3054                                 ieee80211_send_nullfunc(local, sdata, 0);
3055                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3056                                 local->pspolling = true;
3057
3058                                 /*
3059                                  * Here is assumed that the driver will be
3060                                  * able to send ps-poll frame and receive a
3061                                  * response even though power save mode is
3062                                  * enabled, but some drivers might require
3063                                  * to disable power save here. This needs
3064                                  * to be investigated.
3065                                  */
3066                                 ieee80211_send_pspoll(local, sdata);
3067                         }
3068                 }
3069         }
3070
3071         if (sdata->vif.p2p) {
3072                 struct ieee80211_p2p_noa_attr noa = {};
3073                 int ret;
3074
3075                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3076                                             len - baselen,
3077                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3078                                             (u8 *) &noa, sizeof(noa));
3079                 if (ret >= 2) {
3080                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3081                                 /* valid noa_attr and index changed */
3082                                 sdata->u.mgd.p2p_noa_index = noa.index;
3083                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3084                                 changed |= BSS_CHANGED_P2P_PS;
3085                                 /*
3086                                  * make sure we update all information, the CRC
3087                                  * mechanism doesn't look at P2P attributes.
3088                                  */
3089                                 ifmgd->beacon_crc_valid = false;
3090                         }
3091                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3092                         /* noa_attr not found and we had valid noa_attr before */
3093                         sdata->u.mgd.p2p_noa_index = -1;
3094                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3095                         changed |= BSS_CHANGED_P2P_PS;
3096                         ifmgd->beacon_crc_valid = false;
3097                 }
3098         }
3099
3100         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3101                 return;
3102         ifmgd->beacon_crc = ncrc;
3103         ifmgd->beacon_crc_valid = true;
3104
3105         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3106
3107         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3108                                          &elems, true);
3109
3110         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3111             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3112                                      elems.wmm_param_len))
3113                 changed |= BSS_CHANGED_QOS;
3114
3115         /*
3116          * If we haven't had a beacon before, tell the driver about the
3117          * DTIM period (and beacon timing if desired) now.
3118          */
3119         if (!ifmgd->have_beacon) {
3120                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3121                 if (elems.tim)
3122                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3123                 else
3124                         bss_conf->dtim_period = 1;
3125
3126                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3127                         sdata->vif.bss_conf.sync_tsf =
3128                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3129                         sdata->vif.bss_conf.sync_device_ts =
3130                                 rx_status->device_timestamp;
3131                         if (elems.tim)
3132                                 sdata->vif.bss_conf.sync_dtim_count =
3133                                         elems.tim->dtim_count;
3134                         else
3135                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3136                 }
3137
3138                 changed |= BSS_CHANGED_BEACON_INFO;
3139                 ifmgd->have_beacon = true;
3140
3141                 mutex_lock(&local->iflist_mtx);
3142                 ieee80211_recalc_ps(local, -1);
3143                 mutex_unlock(&local->iflist_mtx);
3144
3145                 ieee80211_recalc_ps_vif(sdata);
3146         }
3147
3148         if (elems.erp_info) {
3149                 erp_valid = true;
3150                 erp_value = elems.erp_info[0];
3151         } else {
3152                 erp_valid = false;
3153         }
3154         changed |= ieee80211_handle_bss_capability(sdata,
3155                         le16_to_cpu(mgmt->u.beacon.capab_info),
3156                         erp_valid, erp_value);
3157
3158         mutex_lock(&local->sta_mtx);
3159         sta = sta_info_get(sdata, bssid);
3160
3161         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3162                                 elems.vht_operation, bssid, &changed)) {
3163                 mutex_unlock(&local->sta_mtx);
3164                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3165                                        WLAN_REASON_DEAUTH_LEAVING,
3166                                        true, deauth_buf);
3167                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3168                                       sizeof(deauth_buf));
3169                 return;
3170         }
3171
3172         if (sta && elems.opmode_notif)
3173                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3174                                             rx_status->band, true);
3175         mutex_unlock(&local->sta_mtx);
3176
3177         if (elems.country_elem && elems.pwr_constr_elem &&
3178             mgmt->u.probe_resp.capab_info &
3179                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3180                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3181                                                        elems.country_elem,
3182                                                        elems.country_elem_len,
3183                                                        elems.pwr_constr_elem);
3184
3185         ieee80211_bss_info_change_notify(sdata, changed);
3186 }
3187
3188 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3189                                   struct sk_buff *skb)
3190 {
3191         struct ieee80211_rx_status *rx_status;
3192         struct ieee80211_mgmt *mgmt;
3193         u16 fc;
3194         struct ieee802_11_elems elems;
3195         int ies_len;
3196
3197         rx_status = (struct ieee80211_rx_status *) skb->cb;
3198         mgmt = (struct ieee80211_mgmt *) skb->data;
3199         fc = le16_to_cpu(mgmt->frame_control);
3200
3201         sdata_lock(sdata);
3202
3203         switch (fc & IEEE80211_FCTL_STYPE) {
3204         case IEEE80211_STYPE_BEACON:
3205                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3206                 break;
3207         case IEEE80211_STYPE_PROBE_RESP:
3208                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3209                 break;
3210         case IEEE80211_STYPE_AUTH:
3211                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3212                 break;
3213         case IEEE80211_STYPE_DEAUTH:
3214                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3215                 break;
3216         case IEEE80211_STYPE_DISASSOC:
3217                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3218                 break;
3219         case IEEE80211_STYPE_ASSOC_RESP:
3220         case IEEE80211_STYPE_REASSOC_RESP:
3221                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3222                 break;
3223         case IEEE80211_STYPE_ACTION:
3224                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3225                         ies_len = skb->len -
3226                                   offsetof(struct ieee80211_mgmt,
3227                                            u.action.u.chan_switch.variable);
3228
3229                         if (ies_len < 0)
3230                                 break;
3231
3232                         ieee802_11_parse_elems(
3233                                 mgmt->u.action.u.chan_switch.variable,
3234                                 ies_len, true, &elems);
3235
3236                         if (elems.parse_error)
3237                                 break;
3238
3239                         ieee80211_sta_process_chanswitch(sdata,
3240                                                          rx_status->mactime,
3241                                                          &elems, false);
3242                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3243                         ies_len = skb->len -
3244                                   offsetof(struct ieee80211_mgmt,
3245                                            u.action.u.ext_chan_switch.variable);
3246
3247                         if (ies_len < 0)
3248                                 break;
3249
3250                         ieee802_11_parse_elems(
3251                                 mgmt->u.action.u.ext_chan_switch.variable,
3252                                 ies_len, true, &elems);
3253
3254                         if (elems.parse_error)
3255                                 break;
3256
3257                         /* for the handling code pretend this was also an IE */
3258                         elems.ext_chansw_ie =
3259                                 &mgmt->u.action.u.ext_chan_switch.data;
3260
3261                         ieee80211_sta_process_chanswitch(sdata,
3262                                                          rx_status->mactime,
3263                                                          &elems, false);
3264                 }
3265                 break;
3266         }
3267         sdata_unlock(sdata);
3268 }
3269
3270 static void ieee80211_sta_timer(unsigned long data)
3271 {
3272         struct ieee80211_sub_if_data *sdata =
3273                 (struct ieee80211_sub_if_data *) data;
3274
3275         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3276 }
3277
3278 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3279                                           u8 *bssid, u8 reason, bool tx)
3280 {
3281         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3282
3283         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3284                                tx, frame_buf);
3285
3286         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3287                               IEEE80211_DEAUTH_FRAME_LEN);
3288 }
3289
3290 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3291 {
3292         struct ieee80211_local *local = sdata->local;
3293         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3294         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3295         u32 tx_flags = 0;
3296
3297         sdata_assert_lock(sdata);
3298
3299         if (WARN_ON_ONCE(!auth_data))
3300                 return -EINVAL;
3301
3302         auth_data->tries++;
3303
3304         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3305                 sdata_info(sdata, "authentication with %pM timed out\n",
3306                            auth_data->bss->bssid);
3307
3308                 /*
3309                  * Most likely AP is not in the range so remove the
3310                  * bss struct for that AP.
3311                  */
3312                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3313
3314                 return -ETIMEDOUT;
3315         }
3316
3317         drv_mgd_prepare_tx(local, sdata);
3318
3319         if (auth_data->bss->proberesp_ies) {
3320                 u16 trans = 1;
3321                 u16 status = 0;
3322
3323                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3324                            auth_data->bss->bssid, auth_data->tries,
3325                            IEEE80211_AUTH_MAX_TRIES);
3326
3327                 auth_data->expected_transaction = 2;
3328
3329                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3330                         trans = auth_data->sae_trans;
3331                         status = auth_data->sae_status;
3332                         auth_data->expected_transaction = trans;
3333                 }
3334
3335                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3336                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3337                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3338
3339                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3340                                     auth_data->data, auth_data->data_len,
3341                                     auth_data->bss->bssid,
3342                                     auth_data->bss->bssid, NULL, 0, 0,
3343                                     tx_flags);
3344         } else {
3345                 const u8 *ssidie;
3346
3347                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3348                            auth_data->bss->bssid, auth_data->tries,
3349                            IEEE80211_AUTH_MAX_TRIES);
3350
3351                 rcu_read_lock();
3352                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3353                 if (!ssidie) {
3354                         rcu_read_unlock();
3355                         return -EINVAL;
3356                 }
3357                 /*
3358                  * Direct probe is sent to broadcast address as some APs
3359                  * will not answer to direct packet in unassociated state.
3360                  */
3361                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3362                                          NULL, 0, (u32) -1, true, 0,
3363                                          auth_data->bss->channel, false);
3364                 rcu_read_unlock();
3365         }
3366
3367         if (tx_flags == 0) {
3368                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3369                 auth_data->timeout_started = true;
3370                 run_again(sdata, auth_data->timeout);
3371         } else {
3372                 auth_data->timeout =
3373                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3374                 auth_data->timeout_started = true;
3375                 run_again(sdata, auth_data->timeout);
3376         }
3377
3378         return 0;
3379 }
3380
3381 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3382 {
3383         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3384         struct ieee80211_local *local = sdata->local;
3385
3386         sdata_assert_lock(sdata);
3387
3388         assoc_data->tries++;
3389         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3390                 sdata_info(sdata, "association with %pM timed out\n",
3391                            assoc_data->bss->bssid);
3392
3393                 /*
3394                  * Most likely AP is not in the range so remove the
3395                  * bss struct for that AP.
3396                  */
3397                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3398
3399                 return -ETIMEDOUT;
3400         }
3401
3402         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3403                    assoc_data->bss->bssid, assoc_data->tries,
3404                    IEEE80211_ASSOC_MAX_TRIES);
3405         ieee80211_send_assoc(sdata);
3406
3407         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3408                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3409                 assoc_data->timeout_started = true;
3410                 run_again(sdata, assoc_data->timeout);
3411         } else {
3412                 assoc_data->timeout =
3413                         round_jiffies_up(jiffies +
3414                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3415                 assoc_data->timeout_started = true;
3416                 run_again(sdata, assoc_data->timeout);
3417         }
3418
3419         return 0;
3420 }
3421
3422 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3423                                   __le16 fc, bool acked)
3424 {
3425         struct ieee80211_local *local = sdata->local;
3426
3427         sdata->u.mgd.status_fc = fc;
3428         sdata->u.mgd.status_acked = acked;
3429         sdata->u.mgd.status_received = true;
3430
3431         ieee80211_queue_work(&local->hw, &sdata->work);
3432 }
3433
3434 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3435 {
3436         struct ieee80211_local *local = sdata->local;
3437         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3438
3439         sdata_lock(sdata);
3440
3441         if (ifmgd->status_received) {
3442                 __le16 fc = ifmgd->status_fc;
3443                 bool status_acked = ifmgd->status_acked;
3444
3445                 ifmgd->status_received = false;
3446                 if (ifmgd->auth_data &&
3447                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3448                         if (status_acked) {
3449                                 ifmgd->auth_data->timeout =
3450                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3451                                 run_again(sdata, ifmgd->auth_data->timeout);
3452                         } else {
3453                                 ifmgd->auth_data->timeout = jiffies - 1;
3454                         }
3455                         ifmgd->auth_data->timeout_started = true;
3456                 } else if (ifmgd->assoc_data &&
3457                            (ieee80211_is_assoc_req(fc) ||
3458                             ieee80211_is_reassoc_req(fc))) {
3459                         if (status_acked) {
3460                                 ifmgd->assoc_data->timeout =
3461                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3462                                 run_again(sdata, ifmgd->assoc_data->timeout);
3463                         } else {
3464                                 ifmgd->assoc_data->timeout = jiffies - 1;
3465                         }
3466                         ifmgd->assoc_data->timeout_started = true;
3467                 }
3468         }
3469
3470         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3471             time_after(jiffies, ifmgd->auth_data->timeout)) {
3472                 if (ifmgd->auth_data->done) {
3473                         /*
3474                          * ok ... we waited for assoc but userspace didn't,
3475                          * so let's just kill the auth data
3476                          */
3477                         ieee80211_destroy_auth_data(sdata, false);
3478                 } else if (ieee80211_probe_auth(sdata)) {
3479                         u8 bssid[ETH_ALEN];
3480
3481                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3482
3483                         ieee80211_destroy_auth_data(sdata, false);
3484
3485                         cfg80211_auth_timeout(sdata->dev, bssid);
3486                 }
3487         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3488                 run_again(sdata, ifmgd->auth_data->timeout);
3489
3490         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3491             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3492                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3493                     ieee80211_do_assoc(sdata)) {
3494                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3495
3496                         ieee80211_destroy_assoc_data(sdata, false);
3497                         cfg80211_assoc_timeout(sdata->dev, bss);
3498                 }
3499         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3500                 run_again(sdata, ifmgd->assoc_data->timeout);
3501
3502         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3503             ifmgd->associated) {
3504                 u8 bssid[ETH_ALEN];
3505                 int max_tries;
3506
3507                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3508
3509                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3510                         max_tries = max_nullfunc_tries;
3511                 else
3512                         max_tries = max_probe_tries;
3513
3514                 /* ACK received for nullfunc probing frame */
3515                 if (!ifmgd->probe_send_count)
3516                         ieee80211_reset_ap_probe(sdata);
3517                 else if (ifmgd->nullfunc_failed) {
3518                         if (ifmgd->probe_send_count < max_tries) {
3519                                 mlme_dbg(sdata,
3520                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3521                                          bssid, ifmgd->probe_send_count,
3522                                          max_tries);
3523                                 ieee80211_mgd_probe_ap_send(sdata);
3524                         } else {
3525                                 mlme_dbg(sdata,
3526                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3527                                          bssid);
3528                                 ieee80211_sta_connection_lost(sdata, bssid,
3529                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3530                                         false);
3531                         }
3532                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3533                         run_again(sdata, ifmgd->probe_timeout);
3534                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3535                         mlme_dbg(sdata,
3536                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3537                                  bssid, probe_wait_ms);
3538                         ieee80211_sta_connection_lost(sdata, bssid,
3539                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3540                 } else if (ifmgd->probe_send_count < max_tries) {
3541                         mlme_dbg(sdata,
3542                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3543                                  bssid, probe_wait_ms,
3544                                  ifmgd->probe_send_count, max_tries);
3545                         ieee80211_mgd_probe_ap_send(sdata);
3546                 } else {
3547                         /*
3548                          * We actually lost the connection ... or did we?
3549                          * Let's make sure!
3550                          */
3551                         wiphy_debug(local->hw.wiphy,
3552                                     "%s: No probe response from AP %pM"
3553                                     " after %dms, disconnecting.\n",
3554                                     sdata->name,
3555                                     bssid, probe_wait_ms);
3556
3557                         ieee80211_sta_connection_lost(sdata, bssid,
3558                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3559                 }
3560         }
3561
3562         sdata_unlock(sdata);
3563 }
3564
3565 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3566 {
3567         struct ieee80211_sub_if_data *sdata =
3568                 (struct ieee80211_sub_if_data *) data;
3569         struct ieee80211_local *local = sdata->local;
3570
3571         if (local->quiescing)
3572                 return;
3573
3574         if (sdata->vif.csa_active)
3575                 return;
3576
3577         sdata->u.mgd.connection_loss = false;
3578         ieee80211_queue_work(&sdata->local->hw,
3579                              &sdata->u.mgd.beacon_connection_loss_work);
3580 }
3581
3582 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3583 {
3584         struct ieee80211_sub_if_data *sdata =
3585                 (struct ieee80211_sub_if_data *) data;
3586         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3587         struct ieee80211_local *local = sdata->local;
3588
3589         if (local->quiescing)
3590                 return;
3591
3592         if (sdata->vif.csa_active)
3593                 return;
3594
3595         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3596 }
3597
3598 static void ieee80211_sta_monitor_work(struct work_struct *work)
3599 {
3600         struct ieee80211_sub_if_data *sdata =
3601                 container_of(work, struct ieee80211_sub_if_data,
3602                              u.mgd.monitor_work);
3603
3604         ieee80211_mgd_probe_ap(sdata, false);
3605 }
3606
3607 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3608 {
3609         u32 flags;
3610
3611         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3612                 __ieee80211_stop_poll(sdata);
3613
3614                 /* let's probe the connection once */
3615                 flags = sdata->local->hw.flags;
3616                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3617                         ieee80211_queue_work(&sdata->local->hw,
3618                                              &sdata->u.mgd.monitor_work);
3619                 /* and do all the other regular work too */
3620                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3621         }
3622 }
3623
3624 #ifdef CONFIG_PM
3625 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3626 {
3627         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3628         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3629
3630         sdata_lock(sdata);
3631
3632         if (ifmgd->auth_data || ifmgd->assoc_data) {
3633                 const u8 *bssid = ifmgd->auth_data ?
3634                                 ifmgd->auth_data->bss->bssid :
3635                                 ifmgd->assoc_data->bss->bssid;
3636
3637                 /*
3638                  * If we are trying to authenticate / associate while suspending,
3639                  * cfg80211 won't know and won't actually abort those attempts,
3640                  * thus we need to do that ourselves.
3641                  */
3642                 ieee80211_send_deauth_disassoc(sdata, bssid,
3643                                                IEEE80211_STYPE_DEAUTH,
3644                                                WLAN_REASON_DEAUTH_LEAVING,
3645                                                false, frame_buf);
3646                 if (ifmgd->assoc_data)
3647                         ieee80211_destroy_assoc_data(sdata, false);
3648                 if (ifmgd->auth_data)
3649                         ieee80211_destroy_auth_data(sdata, false);
3650                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3651                                       IEEE80211_DEAUTH_FRAME_LEN);
3652         }
3653
3654         sdata_unlock(sdata);
3655 }
3656
3657 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3658 {
3659         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3660
3661         sdata_lock(sdata);
3662         if (!ifmgd->associated) {
3663                 sdata_unlock(sdata);
3664                 return;
3665         }
3666
3667         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3668                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3669                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3670                 ieee80211_sta_connection_lost(sdata,
3671                                               ifmgd->associated->bssid,
3672                                               WLAN_REASON_UNSPECIFIED,
3673                                               true);
3674                 sdata_unlock(sdata);
3675                 return;
3676         }
3677         sdata_unlock(sdata);
3678 }
3679 #endif
3680
3681 /* interface setup */
3682 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3683 {
3684         struct ieee80211_if_managed *ifmgd;
3685
3686         ifmgd = &sdata->u.mgd;
3687         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3688         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3689         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3690                   ieee80211_beacon_connection_loss_work);
3691         INIT_WORK(&ifmgd->csa_connection_drop_work,
3692                   ieee80211_csa_connection_drop_work);
3693         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3694         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3695                     (unsigned long) sdata);
3696         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3697                     (unsigned long) sdata);
3698         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3699                     (unsigned long) sdata);
3700         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3701                     (unsigned long) sdata);
3702
3703         ifmgd->flags = 0;
3704         ifmgd->powersave = sdata->wdev.ps;
3705         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3706         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3707         ifmgd->p2p_noa_index = -1;
3708
3709         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3710                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3711         else
3712                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3713 }
3714
3715 /* scan finished notification */
3716 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3717 {
3718         struct ieee80211_sub_if_data *sdata;
3719
3720         /* Restart STA timers */
3721         rcu_read_lock();
3722         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3723                 if (ieee80211_sdata_running(sdata))
3724                         ieee80211_restart_sta_timer(sdata);
3725         }
3726         rcu_read_unlock();
3727 }
3728
3729 int ieee80211_max_network_latency(struct notifier_block *nb,
3730                                   unsigned long data, void *dummy)
3731 {
3732         s32 latency_usec = (s32) data;
3733         struct ieee80211_local *local =
3734                 container_of(nb, struct ieee80211_local,
3735                              network_latency_notifier);
3736
3737         mutex_lock(&local->iflist_mtx);
3738         ieee80211_recalc_ps(local, latency_usec);
3739         mutex_unlock(&local->iflist_mtx);
3740
3741         return NOTIFY_OK;
3742 }
3743
3744 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3745                                      struct cfg80211_bss *cbss)
3746 {
3747         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3748         const u8 *ht_cap_ie, *vht_cap_ie;
3749         const struct ieee80211_ht_cap *ht_cap;
3750         const struct ieee80211_vht_cap *vht_cap;
3751         u8 chains = 1;
3752
3753         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3754                 return chains;
3755
3756         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3757         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3758                 ht_cap = (void *)(ht_cap_ie + 2);
3759                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3760                 /*
3761                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3762                  *       "Tx Unequal Modulation Supported" fields.
3763                  */
3764         }
3765
3766         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3767                 return chains;
3768
3769         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3770         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3771                 u8 nss;
3772                 u16 tx_mcs_map;
3773
3774                 vht_cap = (void *)(vht_cap_ie + 2);
3775                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3776                 for (nss = 8; nss > 0; nss--) {
3777                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3778                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3779                                 break;
3780                 }
3781                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3782                 chains = max(chains, nss);
3783         }
3784
3785         return chains;
3786 }
3787
3788 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3789                                   struct cfg80211_bss *cbss)
3790 {
3791         struct ieee80211_local *local = sdata->local;
3792         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3793         const struct ieee80211_ht_operation *ht_oper = NULL;
3794         const struct ieee80211_vht_operation *vht_oper = NULL;
3795         struct ieee80211_supported_band *sband;
3796         struct cfg80211_chan_def chandef;
3797         int ret;
3798
3799         sband = local->hw.wiphy->bands[cbss->channel->band];
3800
3801         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3802                           IEEE80211_STA_DISABLE_80P80MHZ |
3803                           IEEE80211_STA_DISABLE_160MHZ);
3804
3805         rcu_read_lock();
3806
3807         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3808             sband->ht_cap.ht_supported) {
3809                 const u8 *ht_oper_ie, *ht_cap;
3810
3811                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3812                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3813                         ht_oper = (void *)(ht_oper_ie + 2);
3814
3815                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3816                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3817                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3818                         ht_oper = NULL;
3819                 }
3820         }
3821
3822         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3823             sband->vht_cap.vht_supported) {
3824                 const u8 *vht_oper_ie, *vht_cap;
3825
3826                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3827                                                    WLAN_EID_VHT_OPERATION);
3828                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3829                         vht_oper = (void *)(vht_oper_ie + 2);
3830                 if (vht_oper && !ht_oper) {
3831                         vht_oper = NULL;
3832                         sdata_info(sdata,
3833                                    "AP advertised VHT without HT, disabling both\n");
3834                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3835                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3836                 }
3837
3838                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3839                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3840                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3841                         vht_oper = NULL;
3842                 }
3843         }
3844
3845         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3846                                                      cbss->channel,
3847                                                      ht_oper, vht_oper,
3848                                                      &chandef, false);
3849
3850         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3851                                       local->rx_chains);
3852
3853         rcu_read_unlock();
3854
3855         /* will change later if needed */
3856         sdata->smps_mode = IEEE80211_SMPS_OFF;
3857
3858         mutex_lock(&local->mtx);
3859         /*
3860          * If this fails (possibly due to channel context sharing
3861          * on incompatible channels, e.g. 80+80 and 160 sharing the
3862          * same control channel) try to use a smaller bandwidth.
3863          */
3864         ret = ieee80211_vif_use_channel(sdata, &chandef,
3865                                         IEEE80211_CHANCTX_SHARED);
3866
3867         /* don't downgrade for 5 and 10 MHz channels, though. */
3868         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3869             chandef.width == NL80211_CHAN_WIDTH_10)
3870                 goto out;
3871
3872         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3873                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3874                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3875                                                 IEEE80211_CHANCTX_SHARED);
3876         }
3877  out:
3878         mutex_unlock(&local->mtx);
3879         return ret;
3880 }
3881
3882 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3883                                      struct cfg80211_bss *cbss, bool assoc)
3884 {
3885         struct ieee80211_local *local = sdata->local;
3886         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3887         struct ieee80211_bss *bss = (void *)cbss->priv;
3888         struct sta_info *new_sta = NULL;
3889         bool have_sta = false;
3890         int err;
3891
3892         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3893                 return -EINVAL;
3894
3895         if (assoc) {
3896                 rcu_read_lock();
3897                 have_sta = sta_info_get(sdata, cbss->bssid);
3898                 rcu_read_unlock();
3899         }
3900
3901         if (!have_sta) {
3902                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3903                 if (!new_sta)
3904                         return -ENOMEM;
3905         }
3906         if (new_sta) {
3907                 u32 rates = 0, basic_rates = 0;
3908                 bool have_higher_than_11mbit;
3909                 int min_rate = INT_MAX, min_rate_index = -1;
3910                 struct ieee80211_chanctx_conf *chanctx_conf;
3911                 struct ieee80211_supported_band *sband;
3912                 const struct cfg80211_bss_ies *ies;
3913                 int shift;
3914                 u32 rate_flags;
3915
3916                 sband = local->hw.wiphy->bands[cbss->channel->band];
3917
3918                 err = ieee80211_prep_channel(sdata, cbss);
3919                 if (err) {
3920                         sta_info_free(local, new_sta);
3921                         return -EINVAL;
3922                 }
3923                 shift = ieee80211_vif_get_shift(&sdata->vif);
3924
3925                 rcu_read_lock();
3926                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3927                 if (WARN_ON(!chanctx_conf)) {
3928                         rcu_read_unlock();
3929                         sta_info_free(local, new_sta);
3930                         return -EINVAL;
3931                 }
3932                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3933                 rcu_read_unlock();
3934
3935                 ieee80211_get_rates(sband, bss->supp_rates,
3936                                     bss->supp_rates_len,
3937                                     &rates, &basic_rates,
3938                                     &have_higher_than_11mbit,
3939                                     &min_rate, &min_rate_index,
3940                                     shift, rate_flags);
3941
3942                 /*
3943                  * This used to be a workaround for basic rates missing
3944                  * in the association response frame. Now that we no
3945                  * longer use the basic rates from there, it probably
3946                  * doesn't happen any more, but keep the workaround so
3947                  * in case some *other* APs are buggy in different ways
3948                  * we can connect -- with a warning.
3949                  */
3950                 if (!basic_rates && min_rate_index >= 0) {
3951                         sdata_info(sdata,
3952                                    "No basic rates, using min rate instead\n");
3953                         basic_rates = BIT(min_rate_index);
3954                 }
3955
3956                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3957                 sdata->vif.bss_conf.basic_rates = basic_rates;
3958
3959                 /* cf. IEEE 802.11 9.2.12 */
3960                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3961                     have_higher_than_11mbit)
3962                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3963                 else
3964                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3965
3966                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3967
3968                 /* set timing information */
3969                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3970                 rcu_read_lock();
3971                 ies = rcu_dereference(cbss->beacon_ies);
3972                 if (ies) {
3973                         const u8 *tim_ie;
3974
3975                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3976                         sdata->vif.bss_conf.sync_device_ts =
3977                                 bss->device_ts_beacon;
3978                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3979                                                   ies->data, ies->len);
3980                         if (tim_ie && tim_ie[1] >= 2)
3981                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3982                         else
3983                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3984                 } else if (!(local->hw.flags &
3985                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3986                         ies = rcu_dereference(cbss->proberesp_ies);
3987                         /* must be non-NULL since beacon IEs were NULL */
3988                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3989                         sdata->vif.bss_conf.sync_device_ts =
3990                                 bss->device_ts_presp;
3991                         sdata->vif.bss_conf.sync_dtim_count = 0;
3992                 } else {
3993                         sdata->vif.bss_conf.sync_tsf = 0;
3994                         sdata->vif.bss_conf.sync_device_ts = 0;
3995                         sdata->vif.bss_conf.sync_dtim_count = 0;
3996                 }
3997                 rcu_read_unlock();
3998
3999                 /* tell driver about BSSID, basic rates and timing */
4000                 ieee80211_bss_info_change_notify(sdata,
4001                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4002                         BSS_CHANGED_BEACON_INT);
4003
4004                 if (assoc)
4005                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4006
4007                 err = sta_info_insert(new_sta);
4008                 new_sta = NULL;
4009                 if (err) {
4010                         sdata_info(sdata,
4011                                    "failed to insert STA entry for the AP (error %d)\n",
4012                                    err);
4013                         return err;
4014                 }
4015         } else
4016                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4017
4018         return 0;
4019 }
4020
4021 /* config hooks */
4022 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4023                        struct cfg80211_auth_request *req)
4024 {
4025         struct ieee80211_local *local = sdata->local;
4026         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4027         struct ieee80211_mgd_auth_data *auth_data;
4028         u16 auth_alg;
4029         int err;
4030
4031         /* prepare auth data structure */
4032
4033         switch (req->auth_type) {
4034         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4035                 auth_alg = WLAN_AUTH_OPEN;
4036                 break;
4037         case NL80211_AUTHTYPE_SHARED_KEY:
4038                 if (IS_ERR(local->wep_tx_tfm))
4039                         return -EOPNOTSUPP;
4040                 auth_alg = WLAN_AUTH_SHARED_KEY;
4041                 break;
4042         case NL80211_AUTHTYPE_FT:
4043                 auth_alg = WLAN_AUTH_FT;
4044                 break;
4045         case NL80211_AUTHTYPE_NETWORK_EAP:
4046                 auth_alg = WLAN_AUTH_LEAP;
4047                 break;
4048         case NL80211_AUTHTYPE_SAE:
4049                 auth_alg = WLAN_AUTH_SAE;
4050                 break;
4051         default:
4052                 return -EOPNOTSUPP;
4053         }
4054
4055         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4056                             req->ie_len, GFP_KERNEL);
4057         if (!auth_data)
4058                 return -ENOMEM;
4059
4060         auth_data->bss = req->bss;
4061
4062         if (req->sae_data_len >= 4) {
4063                 __le16 *pos = (__le16 *) req->sae_data;
4064                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4065                 auth_data->sae_status = le16_to_cpu(pos[1]);
4066                 memcpy(auth_data->data, req->sae_data + 4,
4067                        req->sae_data_len - 4);
4068                 auth_data->data_len += req->sae_data_len - 4;
4069         }
4070
4071         if (req->ie && req->ie_len) {
4072                 memcpy(&auth_data->data[auth_data->data_len],
4073                        req->ie, req->ie_len);
4074                 auth_data->data_len += req->ie_len;
4075         }
4076
4077         if (req->key && req->key_len) {
4078                 auth_data->key_len = req->key_len;
4079                 auth_data->key_idx = req->key_idx;
4080                 memcpy(auth_data->key, req->key, req->key_len);
4081         }
4082
4083         auth_data->algorithm = auth_alg;
4084
4085         /* try to authenticate/probe */
4086
4087         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4088             ifmgd->assoc_data) {
4089                 err = -EBUSY;
4090                 goto err_free;
4091         }
4092
4093         if (ifmgd->auth_data)
4094                 ieee80211_destroy_auth_data(sdata, false);
4095
4096         /* prep auth_data so we don't go into idle on disassoc */
4097         ifmgd->auth_data = auth_data;
4098
4099         if (ifmgd->associated) {
4100                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4101
4102                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4103                                        WLAN_REASON_UNSPECIFIED,
4104                                        false, frame_buf);
4105
4106                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4107                                       sizeof(frame_buf));
4108         }
4109
4110         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4111
4112         err = ieee80211_prep_connection(sdata, req->bss, false);
4113         if (err)
4114                 goto err_clear;
4115
4116         err = ieee80211_probe_auth(sdata);
4117         if (err) {
4118                 sta_info_destroy_addr(sdata, req->bss->bssid);
4119                 goto err_clear;
4120         }
4121
4122         /* hold our own reference */
4123         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4124         return 0;
4125
4126  err_clear:
4127         memset(ifmgd->bssid, 0, ETH_ALEN);
4128         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4129         ifmgd->auth_data = NULL;
4130  err_free:
4131         kfree(auth_data);
4132         return err;
4133 }
4134
4135 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4136                                         const u8 *wmm_param, int len)
4137 {
4138         const u8 *pos;
4139         size_t left;
4140
4141         if (len < 8)
4142                 return false;
4143
4144         if (wmm_param[5] != 1 /* version */)
4145                 return false;
4146
4147         pos = wmm_param + 8;
4148         left = len - 8;
4149
4150         for (; left >= 4; left -= 4, pos += 4) {
4151                 u8 aifsn = pos[0] & 0x0f;
4152                 u8 ecwmin = pos[1] & 0x0f;
4153                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4154                 int aci = (pos[0] >> 5) & 0x03;
4155
4156                 if (aifsn < 2) {
4157                         sdata_info(sdata,
4158                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4159                                    aifsn, aci);
4160                         return false;
4161                 }
4162                 if (ecwmin > ecwmax) {
4163                         sdata_info(sdata,
4164                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4165                                    ecwmin, ecwmax, aci);
4166                         return false;
4167                 }
4168         }
4169
4170         return true;
4171 }
4172
4173 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4174                         struct cfg80211_assoc_request *req)
4175 {
4176         struct ieee80211_local *local = sdata->local;
4177         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4178         struct ieee80211_bss *bss = (void *)req->bss->priv;
4179         struct ieee80211_mgd_assoc_data *assoc_data;
4180         const struct cfg80211_bss_ies *beacon_ies;
4181         struct ieee80211_supported_band *sband;
4182         const u8 *ssidie, *ht_ie, *vht_ie;
4183         int i, err;
4184
4185         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4186         if (!assoc_data)
4187                 return -ENOMEM;
4188
4189         rcu_read_lock();
4190         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4191         if (!ssidie) {
4192                 rcu_read_unlock();
4193                 kfree(assoc_data);
4194                 return -EINVAL;
4195         }
4196         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4197         assoc_data->ssid_len = ssidie[1];
4198         rcu_read_unlock();
4199
4200         if (ifmgd->associated) {
4201                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4202
4203                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4204                                        WLAN_REASON_UNSPECIFIED,
4205                                        false, frame_buf);
4206
4207                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4208                                       sizeof(frame_buf));
4209         }
4210
4211         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4212                 err = -EBUSY;
4213                 goto err_free;
4214         }
4215
4216         if (ifmgd->assoc_data) {
4217                 err = -EBUSY;
4218                 goto err_free;
4219         }
4220
4221         if (ifmgd->auth_data) {
4222                 bool match;
4223
4224                 /* keep sta info, bssid if matching */
4225                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4226                 ieee80211_destroy_auth_data(sdata, match);
4227         }
4228
4229         /* prepare assoc data */
4230
4231         ifmgd->beacon_crc_valid = false;
4232
4233         assoc_data->wmm = bss->wmm_used &&
4234                           (local->hw.queues >= IEEE80211_NUM_ACS);
4235         if (assoc_data->wmm) {
4236                 /* try to check validity of WMM params IE */
4237                 const struct cfg80211_bss_ies *ies;
4238                 const u8 *wp, *start, *end;
4239
4240                 rcu_read_lock();
4241                 ies = rcu_dereference(req->bss->ies);
4242                 start = ies->data;
4243                 end = start + ies->len;
4244
4245                 while (true) {
4246                         wp = cfg80211_find_vendor_ie(
4247                                 WLAN_OUI_MICROSOFT,
4248                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4249                                 start, end - start);
4250                         if (!wp)
4251                                 break;
4252                         start = wp + wp[1] + 2;
4253                         /* if this IE is too short, try the next */
4254                         if (wp[1] <= 4)
4255                                 continue;
4256                         /* if this IE is WMM params, we found what we wanted */
4257                         if (wp[6] == 1)
4258                                 break;
4259                 }
4260
4261                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4262                                                         wp[1] - 2)) {
4263                         assoc_data->wmm = false;
4264                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4265                 }
4266                 rcu_read_unlock();
4267         }
4268
4269         /*
4270          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4271          * We still associate in non-HT mode (11a/b/g) if any one of these
4272          * ciphers is configured as pairwise.
4273          * We can set this to true for non-11n hardware, that'll be checked
4274          * separately along with the peer capabilities.
4275          */
4276         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4277                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4278                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4279                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4280                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4281                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4282                         netdev_info(sdata->dev,
4283                                     "disabling HT/VHT due to WEP/TKIP use\n");
4284                 }
4285         }
4286
4287         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4288                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4289                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4290         }
4291
4292         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4293                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4294
4295         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4296         sband = local->hw.wiphy->bands[req->bss->channel->band];
4297         if (!sband->ht_cap.ht_supported ||
4298             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4299             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4300                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4301                 if (!bss->wmm_used &&
4302                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4303                         netdev_info(sdata->dev,
4304                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4305         }
4306
4307         /* disable VHT if we don't support it or the AP doesn't use WMM */
4308         if (!sband->vht_cap.vht_supported ||
4309             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4310             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4311                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4312                 if (!bss->wmm_used &&
4313                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4314                         netdev_info(sdata->dev,
4315                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4316         }
4317
4318         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4319         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4320                sizeof(ifmgd->ht_capa_mask));
4321
4322         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4323         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4324                sizeof(ifmgd->vht_capa_mask));
4325
4326         if (req->ie && req->ie_len) {
4327                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4328                 assoc_data->ie_len = req->ie_len;
4329         }
4330
4331         assoc_data->bss = req->bss;
4332
4333         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4334                 if (ifmgd->powersave)
4335                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4336                 else
4337                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4338         } else
4339                 sdata->smps_mode = ifmgd->req_smps;
4340
4341         assoc_data->capability = req->bss->capability;
4342         assoc_data->supp_rates = bss->supp_rates;
4343         assoc_data->supp_rates_len = bss->supp_rates_len;
4344
4345         rcu_read_lock();
4346         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4347         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4348                 assoc_data->ap_ht_param =
4349                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4350         else
4351                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4352         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4353         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4354                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4355                        sizeof(struct ieee80211_vht_cap));
4356         else
4357                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4358         rcu_read_unlock();
4359
4360         if (bss->wmm_used && bss->uapsd_supported &&
4361             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4362             sdata->wmm_acm != 0xff) {
4363                 assoc_data->uapsd = true;
4364                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4365         } else {
4366                 assoc_data->uapsd = false;
4367                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4368         }
4369
4370         if (req->prev_bssid)
4371                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4372
4373         if (req->use_mfp) {
4374                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4375                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4376         } else {
4377                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4378                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4379         }
4380
4381         if (req->crypto.control_port)
4382                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4383         else
4384                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4385
4386         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4387         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4388         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4389                                                         sdata->vif.type);
4390
4391         /* kick off associate process */
4392
4393         ifmgd->assoc_data = assoc_data;
4394         ifmgd->dtim_period = 0;
4395         ifmgd->have_beacon = false;
4396
4397         err = ieee80211_prep_connection(sdata, req->bss, true);
4398         if (err)
4399                 goto err_clear;
4400
4401         rcu_read_lock();
4402         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4403
4404         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4405             !beacon_ies) {
4406                 /*
4407                  * Wait up to one beacon interval ...
4408                  * should this be more if we miss one?
4409                  */
4410                 sdata_info(sdata, "waiting for beacon from %pM\n",
4411                            ifmgd->bssid);
4412                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4413                 assoc_data->timeout_started = true;
4414                 assoc_data->need_beacon = true;
4415         } else if (beacon_ies) {
4416                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4417                                                     beacon_ies->data,
4418                                                     beacon_ies->len);
4419                 u8 dtim_count = 0;
4420
4421                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4422                         const struct ieee80211_tim_ie *tim;
4423                         tim = (void *)(tim_ie + 2);
4424                         ifmgd->dtim_period = tim->dtim_period;
4425                         dtim_count = tim->dtim_count;
4426                 }
4427                 ifmgd->have_beacon = true;
4428                 assoc_data->timeout = jiffies;
4429                 assoc_data->timeout_started = true;
4430
4431                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4432                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4433                         sdata->vif.bss_conf.sync_device_ts =
4434                                 bss->device_ts_beacon;
4435                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4436                 }
4437         } else {
4438                 assoc_data->timeout = jiffies;
4439                 assoc_data->timeout_started = true;
4440         }
4441         rcu_read_unlock();
4442
4443         run_again(sdata, assoc_data->timeout);
4444
4445         if (bss->corrupt_data) {
4446                 char *corrupt_type = "data";
4447                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4448                         if (bss->corrupt_data &
4449                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4450                                 corrupt_type = "beacon and probe response";
4451                         else
4452                                 corrupt_type = "beacon";
4453                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4454                         corrupt_type = "probe response";
4455                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4456                            corrupt_type);
4457         }
4458
4459         return 0;
4460  err_clear:
4461         memset(ifmgd->bssid, 0, ETH_ALEN);
4462         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4463         ifmgd->assoc_data = NULL;
4464  err_free:
4465         kfree(assoc_data);
4466         return err;
4467 }
4468
4469 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4470                          struct cfg80211_deauth_request *req)
4471 {
4472         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4473         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4474         bool tx = !req->local_state_change;
4475
4476         if (ifmgd->auth_data &&
4477             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4478                 sdata_info(sdata,
4479                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4480                            req->bssid, req->reason_code,
4481                            ieee80211_get_reason_code_string(req->reason_code));
4482
4483                 drv_mgd_prepare_tx(sdata->local, sdata);
4484                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4485                                                IEEE80211_STYPE_DEAUTH,
4486                                                req->reason_code, tx,
4487                                                frame_buf);
4488                 ieee80211_destroy_auth_data(sdata, false);
4489                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4490                                       IEEE80211_DEAUTH_FRAME_LEN);
4491
4492                 return 0;
4493         }
4494
4495         if (ifmgd->associated &&
4496             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4497                 sdata_info(sdata,
4498                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4499                            req->bssid, req->reason_code,
4500                            ieee80211_get_reason_code_string(req->reason_code));
4501
4502                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4503                                        req->reason_code, tx, frame_buf);
4504                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4505                                       IEEE80211_DEAUTH_FRAME_LEN);
4506                 return 0;
4507         }
4508
4509         return -ENOTCONN;
4510 }
4511
4512 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4513                            struct cfg80211_disassoc_request *req)
4514 {
4515         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4516         u8 bssid[ETH_ALEN];
4517         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4518
4519         /*
4520          * cfg80211 should catch this ... but it's racy since
4521          * we can receive a disassoc frame, process it, hand it
4522          * to cfg80211 while that's in a locked section already
4523          * trying to tell us that the user wants to disconnect.
4524          */
4525         if (ifmgd->associated != req->bss)
4526                 return -ENOLINK;
4527
4528         sdata_info(sdata,
4529                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4530                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4531
4532         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4533         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4534                                req->reason_code, !req->local_state_change,
4535                                frame_buf);
4536
4537         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4538                               IEEE80211_DEAUTH_FRAME_LEN);
4539
4540         return 0;
4541 }
4542
4543 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4544 {
4545         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4546
4547         /*
4548          * Make sure some work items will not run after this,
4549          * they will not do anything but might not have been
4550          * cancelled when disconnecting.
4551          */
4552         cancel_work_sync(&ifmgd->monitor_work);
4553         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4554         cancel_work_sync(&ifmgd->request_smps_work);
4555         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4556         cancel_work_sync(&ifmgd->chswitch_work);
4557
4558         sdata_lock(sdata);
4559         if (ifmgd->assoc_data) {
4560                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4561                 ieee80211_destroy_assoc_data(sdata, false);
4562                 cfg80211_assoc_timeout(sdata->dev, bss);
4563         }
4564         if (ifmgd->auth_data)
4565                 ieee80211_destroy_auth_data(sdata, false);
4566         del_timer_sync(&ifmgd->timer);
4567         sdata_unlock(sdata);
4568 }
4569
4570 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4571                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4572                                gfp_t gfp)
4573 {
4574         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4575
4576         trace_api_cqm_rssi_notify(sdata, rssi_event);
4577
4578         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4579 }
4580 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);