net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33
  34 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  35 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  36 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  37 #define IEEE80211_AUTH_MAX_TRIES        3
  38 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  39 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  40 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  41 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  42 #define IEEE80211_ASSOC_MAX_TRIES       3
  43
  44 static int max_nullfunc_tries = 2;
  45 module_param(max_nullfunc_tries, int, 0644);
  46 MODULE_PARM_DESC(max_nullfunc_tries,
  47                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  48
  49 static int max_probe_tries = 5;
  50 module_param(max_probe_tries, int, 0644);
  51 MODULE_PARM_DESC(max_probe_tries,
  52                  "Maximum probe tries before disconnecting (reason 4).");
  53
  54 /*
  55  * Beacon loss timeout is calculated as N frames times the
  56  * advertised beacon interval.  This may need to be somewhat
  57  * higher than what hardware might detect to account for
  58  * delays in the host processing frames. But since we also
  59  * probe on beacon miss before declaring the connection lost
  60  * default to what we want.
  61  */
  62 static int beacon_loss_count = 7;
  63 module_param(beacon_loss_count, int, 0644);
  64 MODULE_PARM_DESC(beacon_loss_count,
  65                  "Number of beacon intervals before we decide beacon was lost.");
  66
  67 /*
  68  * Time the connection can be idle before we probe
  69  * it to see if we can still talk to the AP.
  70  */
  71 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  72 /*
  73  * Time we wait for a probe response after sending
  74  * a probe request because of beacon loss or for
  75  * checking the connection still works.
  76  */
  77 static int probe_wait_ms = 500;
  78 module_param(probe_wait_ms, int, 0644);
  79 MODULE_PARM_DESC(probe_wait_ms,
  80                  "Maximum time(ms) to wait for probe response"
  81                  " before disconnecting (reason 4).");
  82
  83 /*
  84  * How many Beacon frames need to have been used in average signal strength
  85  * before starting to indicate signal change events.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  88
  89 /*
  90  * We can have multiple work items (and connection probing)
  91  * scheduling this timer, but we need to take care to only
  92  * reschedule it when it should fire _earlier_ than it was
  93  * asked for before, or if it's not pending right now. This
  94  * function ensures that. Note that it then is required to
  95  * run this function for all timeouts after the first one
  96  * has happened -- the work that runs from this timer will
  97  * do that.
  98  */
  99 static void run_again(struct ieee80211_sub_if_data *sdata,
 100                       unsigned long timeout)
 101 {
 102         sdata_assert_lock(sdata);
 103
 104         if (!timer_pending(&sdata->u.mgd.timer) ||
 105             time_before(timeout, sdata->u.mgd.timer.expires))
 106                 mod_timer(&sdata->u.mgd.timer, timeout);
 107 }
 108
 109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 110 {
 111         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 112                 return;
 113
 114         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 115                 return;
 116
 117         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 118                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 119 }
 120
 121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 122 {
 123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 124
 125         if (unlikely(!ifmgd->associated))
 126                 return;
 127
 128         if (ifmgd->probe_send_count)
 129                 ifmgd->probe_send_count = 0;
 130
 131         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 132                 return;
 133
 134         mod_timer(&ifmgd->conn_mon_timer,
 135                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 136 }
 137
 138 static int ecw2cw(int ecw)
 139 {
 140         return (1 << ecw) - 1;
 141 }
 142
 143 static u32
 144 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 145                              struct ieee80211_supported_band *sband,
 146                              struct ieee80211_channel *channel,
 147                              const struct ieee80211_ht_cap *ht_cap,
 148                              const struct ieee80211_ht_operation *ht_oper,
 149                              const struct ieee80211_vht_operation *vht_oper,
 150                              struct cfg80211_chan_def *chandef, bool tracking)
 151 {
 152         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 153         struct cfg80211_chan_def vht_chandef;
 154         struct ieee80211_sta_ht_cap sta_ht_cap;
 155         u32 ht_cfreq, ret;
 156
 157         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 158         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 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_cap || !ht_oper || !sta_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         if (!(ht_cap->cap_info &
 173               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 174                 ret = IEEE80211_STA_DISABLE_40MHZ;
 175                 vht_chandef = *chandef;
 176                 goto out;
 177         }
 178
 179         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 180                                                   channel->band);
 181         /* check that channel matches the right operating channel */
 182         if (!tracking && channel->center_freq != ht_cfreq) {
 183                 /*
 184                  * It's possible that some APs are confused here;
 185                  * Netgear WNDR3700 sometimes reports 4 higher than
 186                  * the actual channel in association responses, but
 187                  * since we look at probe response/beacon data here
 188                  * it should be OK.
 189                  */
 190                 sdata_info(sdata,
 191                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 192                            channel->center_freq, ht_cfreq,
 193                            ht_oper->primary_chan, channel->band);
 194                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 195                 goto out;
 196         }
 197
 198         /* check 40 MHz support, if we have it */
 199         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 200                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 201         } else {
 202                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 203                 ret = IEEE80211_STA_DISABLE_VHT;
 204                 /* also mark 40 MHz disabled */
 205                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 206                 goto out;
 207         }
 208
 209         if (!vht_oper || !sband->vht_cap.vht_supported) {
 210                 ret = IEEE80211_STA_DISABLE_VHT;
 211                 goto out;
 212         }
 213
 214         vht_chandef = *chandef;
 215         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 216                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 217                         sdata_info(sdata,
 218                                    "AP VHT information is invalid, disable VHT\n");
 219                 ret = IEEE80211_STA_DISABLE_VHT;
 220                 goto out;
 221         }
 222
 223         if (!cfg80211_chandef_valid(&vht_chandef)) {
 224                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 225                         sdata_info(sdata,
 226                                    "AP VHT information is invalid, disable VHT\n");
 227                 ret = IEEE80211_STA_DISABLE_VHT;
 228                 goto out;
 229         }
 230
 231         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 232                 ret = 0;
 233                 goto out;
 234         }
 235
 236         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 237                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 238                         sdata_info(sdata,
 239                                    "AP VHT information doesn't match HT, disable VHT\n");
 240                 ret = IEEE80211_STA_DISABLE_VHT;
 241                 goto out;
 242         }
 243
 244         *chandef = vht_chandef;
 245
 246         ret = 0;
 247
 248 out:
 249         /*
 250          * When tracking the current AP, don't do any further checks if the
 251          * new chandef is identical to the one we're currently using for the
 252          * connection. This keeps us from playing ping-pong with regulatory,
 253          * without it the following can happen (for example):
 254          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 255          *  - AP advertises regdom US
 256          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 257          *  - the code below detects an unsupported channel, downgrades, and
 258          *    we disconnect from the AP in the caller
 259          *  - disconnect causes CRDA to reload world regdomain and the game
 260          *    starts anew.
 261          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 262          *
 263          * It seems possible that there are still scenarios with CSA or real
 264          * bandwidth changes where a this could happen, but those cases are
 265          * less common and wouldn't completely prevent using the AP.
 266          */
 267         if (tracking &&
 268             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 269                 return ret;
 270
 271         /* don't print the message below for VHT mismatch if VHT is disabled */
 272         if (ret & IEEE80211_STA_DISABLE_VHT)
 273                 vht_chandef = *chandef;
 274
 275         /*
 276          * Ignore the DISABLED flag when we're already connected and only
 277          * tracking the APs beacon for bandwidth changes - otherwise we
 278          * might get disconnected here if we connect to an AP, update our
 279          * regulatory information based on the AP's country IE and the
 280          * information we have is wrong/outdated and disables the channel
 281          * that we're actually using for the connection to the AP.
 282          */
 283         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 284                                         tracking ? 0 :
 285                                                    IEEE80211_CHAN_DISABLED)) {
 286                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 287                         ret = IEEE80211_STA_DISABLE_HT |
 288                               IEEE80211_STA_DISABLE_VHT;
 289                         break;
 290                 }
 291
 292                 ret |= ieee80211_chandef_downgrade(chandef);
 293         }
 294
 295         if (chandef->width != vht_chandef.width && !tracking)
 296                 sdata_info(sdata,
 297                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 298
 299         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 300         return ret;
 301 }
 302
 303 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 304                                struct sta_info *sta,
 305                                const struct ieee80211_ht_cap *ht_cap,
 306                                const struct ieee80211_ht_operation *ht_oper,
 307                                const struct ieee80211_vht_operation *vht_oper,
 308                                const u8 *bssid, u32 *changed)
 309 {
 310         struct ieee80211_local *local = sdata->local;
 311         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 312         struct ieee80211_supported_band *sband;
 313         struct ieee80211_channel *chan;
 314         struct cfg80211_chan_def chandef;
 315         u16 ht_opmode;
 316         u32 flags;
 317         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 318         int ret;
 319
 320         /* if HT was/is disabled, don't track any bandwidth changes */
 321         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 322                 return 0;
 323
 324         /* don't check VHT if we associated as non-VHT station */
 325         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 326                 vht_oper = NULL;
 327
 328         if (WARN_ON_ONCE(!sta))
 329                 return -EINVAL;
 330
 331         /*
 332          * if bss configuration changed store the new one -
 333          * this may be applicable even if channel is identical
 334          */
 335         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 336         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 337                 *changed |= BSS_CHANGED_HT;
 338                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 339         }
 340
 341         chan = sdata->vif.bss_conf.chandef.chan;
 342         sband = local->hw.wiphy->bands[chan->band];
 343
 344         /* calculate new channel (type) based on HT/VHT operation IEs */
 345         flags = ieee80211_determine_chantype(sdata, sband, chan,
 346                                              ht_cap, ht_oper, vht_oper,
 347                                              &chandef, true);
 348
 349         /*
 350          * Downgrade the new channel if we associated with restricted
 351          * capabilities. For example, if we associated as a 20 MHz STA
 352          * to a 40 MHz AP (due to regulatory, capabilities or config
 353          * reasons) then switching to a 40 MHz channel now won't do us
 354          * any good -- we couldn't use it with the AP.
 355          */
 356         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 357             chandef.width == NL80211_CHAN_WIDTH_80P80)
 358                 flags |= ieee80211_chandef_downgrade(&chandef);
 359         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 360             chandef.width == NL80211_CHAN_WIDTH_160)
 361                 flags |= ieee80211_chandef_downgrade(&chandef);
 362         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 363             chandef.width > NL80211_CHAN_WIDTH_20)
 364                 flags |= ieee80211_chandef_downgrade(&chandef);
 365
 366         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 367                 return 0;
 368
 369         sdata_info(sdata,
 370                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 371                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 372                    chandef.center_freq1, chandef.center_freq2);
 373
 374         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 375                                       IEEE80211_STA_DISABLE_VHT |
 376                                       IEEE80211_STA_DISABLE_40MHZ |
 377                                       IEEE80211_STA_DISABLE_80P80MHZ |
 378                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 379             !cfg80211_chandef_valid(&chandef)) {
 380                 sdata_info(sdata,
 381                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 382                            ifmgd->bssid);
 383                 return -EINVAL;
 384         }
 385
 386         switch (chandef.width) {
 387         case NL80211_CHAN_WIDTH_20_NOHT:
 388         case NL80211_CHAN_WIDTH_20:
 389                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 390                 break;
 391         case NL80211_CHAN_WIDTH_40:
 392                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 393                 break;
 394         case NL80211_CHAN_WIDTH_80:
 395                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 396                 break;
 397         case NL80211_CHAN_WIDTH_80P80:
 398         case NL80211_CHAN_WIDTH_160:
 399                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 400                 break;
 401         default:
 402                 return -EINVAL;
 403         }
 404
 405         if (new_sta_bw > sta->cur_max_bandwidth)
 406                 new_sta_bw = sta->cur_max_bandwidth;
 407
 408         if (new_sta_bw < sta->sta.bandwidth) {
 409                 sta->sta.bandwidth = new_sta_bw;
 410                 rate_control_rate_update(local, sband, sta,
 411                                          IEEE80211_RC_BW_CHANGED);
 412         }
 413
 414         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 415         if (ret) {
 416                 sdata_info(sdata,
 417                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 418                            ifmgd->bssid);
 419                 return ret;
 420         }
 421
 422         if (new_sta_bw > sta->sta.bandwidth) {
 423                 sta->sta.bandwidth = new_sta_bw;
 424                 rate_control_rate_update(local, sband, sta,
 425                                          IEEE80211_RC_BW_CHANGED);
 426         }
 427
 428         return 0;
 429 }
 430
 431 /* frame sending functions */
 432
 433 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 434                                 struct sk_buff *skb, u8 ap_ht_param,
 435                                 struct ieee80211_supported_band *sband,
 436                                 struct ieee80211_channel *channel,
 437                                 enum ieee80211_smps_mode smps)
 438 {
 439         u8 *pos;
 440         u32 flags = channel->flags;
 441         u16 cap;
 442         struct ieee80211_sta_ht_cap ht_cap;
 443
 444         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 445
 446         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 447         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 448
 449         /* determine capability flags */
 450         cap = ht_cap.cap;
 451
 452         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 453         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 454                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 455                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 456                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 457                 }
 458                 break;
 459         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 460                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 461                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 462                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 463                 }
 464                 break;
 465         }
 466
 467         /*
 468          * If 40 MHz was disabled associate as though we weren't
 469          * capable of 40 MHz -- some broken APs will never fall
 470          * back to trying to transmit in 20 MHz.
 471          */
 472         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 473                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 474                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 475         }
 476
 477         /* set SM PS mode properly */
 478         cap &= ~IEEE80211_HT_CAP_SM_PS;
 479         switch (smps) {
 480         case IEEE80211_SMPS_AUTOMATIC:
 481         case IEEE80211_SMPS_NUM_MODES:
 482                 WARN_ON(1);
 483         case IEEE80211_SMPS_OFF:
 484                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 485                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 486                 break;
 487         case IEEE80211_SMPS_STATIC:
 488                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 489                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 490                 break;
 491         case IEEE80211_SMPS_DYNAMIC:
 492                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 493                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 494                 break;
 495         }
 496
 497         /* reserve and fill IE */
 498         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 499         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 500 }
 501
 502 /* This function determines vht capability flags for the association
 503  * and builds the IE.
 504  * Note - the function may set the owner of the MU-MIMO capability
 505  */
 506 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 507                                  struct sk_buff *skb,
 508                                  struct ieee80211_supported_band *sband,
 509                                  struct ieee80211_vht_cap *ap_vht_cap)
 510 {
 511         struct ieee80211_local *local = sdata->local;
 512         u8 *pos;
 513         u32 cap;
 514         struct ieee80211_sta_vht_cap vht_cap;
 515         u32 mask, ap_bf_sts, our_bf_sts;
 516
 517         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 518
 519         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 520         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 521
 522         /* determine capability flags */
 523         cap = vht_cap.cap;
 524
 525         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 526                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 527
 528                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 529                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 530                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 531                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 532         }
 533
 534         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 535                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 536                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 537         }
 538
 539         /*
 540          * Some APs apparently get confused if our capabilities are better
 541          * than theirs, so restrict what we advertise in the assoc request.
 542          */
 543         if (!(ap_vht_cap->vht_cap_info &
 544                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 545                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 546                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 547         else if (!(ap_vht_cap->vht_cap_info &
 548                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 549                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 550
 551         /*
 552          * If some other vif is using the MU-MIMO capablity we cannot associate
 553          * using MU-MIMO - this will lead to contradictions in the group-id
 554          * mechanism.
 555          * Ownership is defined since association request, in order to avoid
 556          * simultaneous associations with MU-MIMO.
 557          */
 558         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 559                 bool disable_mu_mimo = false;
 560                 struct ieee80211_sub_if_data *other;
 561
 562                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 563                         if (other->vif.mu_mimo_owner) {
 564                                 disable_mu_mimo = true;
 565                                 break;
 566                         }
 567                 }
 568                 if (disable_mu_mimo)
 569                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 570                 else
 571                         sdata->vif.mu_mimo_owner = true;
 572         }
 573
 574         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 575
 576         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 577         our_bf_sts = cap & mask;
 578
 579         if (ap_bf_sts < our_bf_sts) {
 580                 cap &= ~mask;
 581                 cap |= ap_bf_sts;
 582         }
 583
 584         /* reserve and fill IE */
 585         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 586         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 587 }
 588
 589 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 590 {
 591         struct ieee80211_local *local = sdata->local;
 592         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 593         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 594         struct sk_buff *skb;
 595         struct ieee80211_mgmt *mgmt;
 596         u8 *pos, qos_info;
 597         size_t offset = 0, noffset;
 598         int i, count, rates_len, supp_rates_len, shift;
 599         u16 capab;
 600         struct ieee80211_supported_band *sband;
 601         struct ieee80211_chanctx_conf *chanctx_conf;
 602         struct ieee80211_channel *chan;
 603         u32 rate_flags, rates = 0;
 604
 605         sdata_assert_lock(sdata);
 606
 607         rcu_read_lock();
 608         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 609         if (WARN_ON(!chanctx_conf)) {
 610                 rcu_read_unlock();
 611                 return;
 612         }
 613         chan = chanctx_conf->def.chan;
 614         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 615         rcu_read_unlock();
 616         sband = local->hw.wiphy->bands[chan->band];
 617         shift = ieee80211_vif_get_shift(&sdata->vif);
 618
 619         if (assoc_data->supp_rates_len) {
 620                 /*
 621                  * Get all rates supported by the device and the AP as
 622                  * some APs don't like getting a superset of their rates
 623                  * in the association request (e.g. D-Link DAP 1353 in
 624                  * b-only mode)...
 625                  */
 626                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 627                                                      assoc_data->supp_rates,
 628                                                      assoc_data->supp_rates_len,
 629                                                      &rates);
 630         } else {
 631                 /*
 632                  * In case AP not provide any supported rates information
 633                  * before association, we send information element(s) with
 634                  * all rates that we support.
 635                  */
 636                 rates_len = 0;
 637                 for (i = 0; i < sband->n_bitrates; i++) {
 638                         if ((rate_flags & sband->bitrates[i].flags)
 639                             != rate_flags)
 640                                 continue;
 641                         rates |= BIT(i);
 642                         rates_len++;
 643                 }
 644         }
 645
 646         skb = alloc_skb(local->hw.extra_tx_headroom +
 647                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 648                         2 + assoc_data->ssid_len + /* SSID */
 649                         4 + rates_len + /* (extended) rates */
 650                         4 + /* power capability */
 651                         2 + 2 * sband->n_channels + /* supported channels */
 652                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 653                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 654                         assoc_data->ie_len + /* extra IEs */
 655                         9, /* WMM */
 656                         GFP_KERNEL);
 657         if (!skb)
 658                 return;
 659
 660         skb_reserve(skb, local->hw.extra_tx_headroom);
 661
 662         capab = WLAN_CAPABILITY_ESS;
 663
 664         if (sband->band == IEEE80211_BAND_2GHZ) {
 665                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 666                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 667         }
 668
 669         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 670                 capab |= WLAN_CAPABILITY_PRIVACY;
 671
 672         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 673             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 674                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 675
 676         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 677                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 678
 679         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 680         memset(mgmt, 0, 24);
 681         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 682         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 683         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 684
 685         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 686                 skb_put(skb, 10);
 687                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 688                                                   IEEE80211_STYPE_REASSOC_REQ);
 689                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 690                 mgmt->u.reassoc_req.listen_interval =
 691                                 cpu_to_le16(local->hw.conf.listen_interval);
 692                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 693                        ETH_ALEN);
 694         } else {
 695                 skb_put(skb, 4);
 696                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 697                                                   IEEE80211_STYPE_ASSOC_REQ);
 698                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 699                 mgmt->u.assoc_req.listen_interval =
 700                                 cpu_to_le16(local->hw.conf.listen_interval);
 701         }
 702
 703         /* SSID */
 704         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 705         *pos++ = WLAN_EID_SSID;
 706         *pos++ = assoc_data->ssid_len;
 707         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 708
 709         /* add all rates which were marked to be used above */
 710         supp_rates_len = rates_len;
 711         if (supp_rates_len > 8)
 712                 supp_rates_len = 8;
 713
 714         pos = skb_put(skb, supp_rates_len + 2);
 715         *pos++ = WLAN_EID_SUPP_RATES;
 716         *pos++ = supp_rates_len;
 717
 718         count = 0;
 719         for (i = 0; i < sband->n_bitrates; i++) {
 720                 if (BIT(i) & rates) {
 721                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 722                                                 5 * (1 << shift));
 723                         *pos++ = (u8) rate;
 724                         if (++count == 8)
 725                                 break;
 726                 }
 727         }
 728
 729         if (rates_len > count) {
 730                 pos = skb_put(skb, rates_len - count + 2);
 731                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 732                 *pos++ = rates_len - count;
 733
 734                 for (i++; i < sband->n_bitrates; i++) {
 735                         if (BIT(i) & rates) {
 736                                 int rate;
 737                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 738                                                     5 * (1 << shift));
 739                                 *pos++ = (u8) rate;
 740                         }
 741                 }
 742         }
 743
 744         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 745             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 746                 pos = skb_put(skb, 4);
 747                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 748                 *pos++ = 2;
 749                 *pos++ = 0; /* min tx power */
 750                  /* max tx power */
 751                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 752         }
 753
 754         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 755                 /* TODO: get this in reg domain format */
 756                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 757                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 758                 *pos++ = 2 * sband->n_channels;
 759                 for (i = 0; i < sband->n_channels; i++) {
 760                         *pos++ = ieee80211_frequency_to_channel(
 761                                         sband->channels[i].center_freq);
 762                         *pos++ = 1; /* one channel in the subband*/
 763                 }
 764         }
 765
 766         /* if present, add any custom IEs that go before HT */
 767         if (assoc_data->ie_len) {
 768                 static const u8 before_ht[] = {
 769                         WLAN_EID_SSID,
 770                         WLAN_EID_SUPP_RATES,
 771                         WLAN_EID_EXT_SUPP_RATES,
 772                         WLAN_EID_PWR_CAPABILITY,
 773                         WLAN_EID_SUPPORTED_CHANNELS,
 774                         WLAN_EID_RSN,
 775                         WLAN_EID_QOS_CAPA,
 776                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 777                         WLAN_EID_MOBILITY_DOMAIN,
 778                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 779                         WLAN_EID_RIC_DATA,              /* reassoc only */
 780                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 781                 };
 782                 static const u8 after_ric[] = {
 783                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 784                         WLAN_EID_HT_CAPABILITY,
 785                         WLAN_EID_BSS_COEX_2040,
 786                         WLAN_EID_EXT_CAPABILITY,
 787                         WLAN_EID_QOS_TRAFFIC_CAPA,
 788                         WLAN_EID_TIM_BCAST_REQ,
 789                         WLAN_EID_INTERWORKING,
 790                         /* 60GHz doesn't happen right now */
 791                         WLAN_EID_VHT_CAPABILITY,
 792                         WLAN_EID_OPMODE_NOTIF,
 793                 };
 794
 795                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 796                                                  assoc_data->ie_len,
 797                                                  before_ht,
 798                                                  ARRAY_SIZE(before_ht),
 799                                                  after_ric,
 800                                                  ARRAY_SIZE(after_ric),
 801                                                  offset);
 802                 pos = skb_put(skb, noffset - offset);
 803                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 804                 offset = noffset;
 805         }
 806
 807         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 808                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 809                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 810
 811         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 812                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 813                                     sband, chan, sdata->smps_mode);
 814
 815         /* if present, add any custom IEs that go before VHT */
 816         if (assoc_data->ie_len) {
 817                 static const u8 before_vht[] = {
 818                         WLAN_EID_SSID,
 819                         WLAN_EID_SUPP_RATES,
 820                         WLAN_EID_EXT_SUPP_RATES,
 821                         WLAN_EID_PWR_CAPABILITY,
 822                         WLAN_EID_SUPPORTED_CHANNELS,
 823                         WLAN_EID_RSN,
 824                         WLAN_EID_QOS_CAPA,
 825                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 826                         WLAN_EID_MOBILITY_DOMAIN,
 827                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 828                         WLAN_EID_HT_CAPABILITY,
 829                         WLAN_EID_BSS_COEX_2040,
 830                         WLAN_EID_EXT_CAPABILITY,
 831                         WLAN_EID_QOS_TRAFFIC_CAPA,
 832                         WLAN_EID_TIM_BCAST_REQ,
 833                         WLAN_EID_INTERWORKING,
 834                 };
 835
 836                 /* RIC already taken above, so no need to handle here anymore */
 837                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 838                                              before_vht, ARRAY_SIZE(before_vht),
 839                                              offset);
 840                 pos = skb_put(skb, noffset - offset);
 841                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 842                 offset = noffset;
 843         }
 844
 845         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 846                 ieee80211_add_vht_ie(sdata, skb, sband,
 847                                      &assoc_data->ap_vht_cap);
 848
 849         /* if present, add any custom non-vendor IEs that go after HT */
 850         if (assoc_data->ie_len) {
 851                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 852                                                     assoc_data->ie_len,
 853                                                     offset);
 854                 pos = skb_put(skb, noffset - offset);
 855                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 856                 offset = noffset;
 857         }
 858
 859         if (assoc_data->wmm) {
 860                 if (assoc_data->uapsd) {
 861                         qos_info = ifmgd->uapsd_queues;
 862                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 863                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 864                 } else {
 865                         qos_info = 0;
 866                 }
 867
 868                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 869         }
 870
 871         /* add any remaining custom (i.e. vendor specific here) IEs */
 872         if (assoc_data->ie_len) {
 873                 noffset = assoc_data->ie_len;
 874                 pos = skb_put(skb, noffset - offset);
 875                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 876         }
 877
 878         drv_mgd_prepare_tx(local, sdata);
 879
 880         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 881         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 882                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 883                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 884         ieee80211_tx_skb(sdata, skb);
 885 }
 886
 887 void ieee80211_send_pspoll(struct ieee80211_local *local,
 888                            struct ieee80211_sub_if_data *sdata)
 889 {
 890         struct ieee80211_pspoll *pspoll;
 891         struct sk_buff *skb;
 892
 893         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 894         if (!skb)
 895                 return;
 896
 897         pspoll = (struct ieee80211_pspoll *) skb->data;
 898         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 899
 900         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 901         ieee80211_tx_skb(sdata, skb);
 902 }
 903
 904 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 905                              struct ieee80211_sub_if_data *sdata,
 906                              bool powersave)
 907 {
 908         struct sk_buff *skb;
 909         struct ieee80211_hdr_3addr *nullfunc;
 910         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 911
 912         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 913         if (!skb)
 914                 return;
 915
 916         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 917         if (powersave)
 918                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 919
 920         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 921                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 922
 923         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 924                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 925
 926         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 927                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 928
 929         ieee80211_tx_skb(sdata, skb);
 930 }
 931
 932 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 933                                           struct ieee80211_sub_if_data *sdata)
 934 {
 935         struct sk_buff *skb;
 936         struct ieee80211_hdr *nullfunc;
 937         __le16 fc;
 938
 939         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 940                 return;
 941
 942         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 943         if (!skb)
 944                 return;
 945
 946         skb_reserve(skb, local->hw.extra_tx_headroom);
 947
 948         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 949         memset(nullfunc, 0, 30);
 950         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 951                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 952         nullfunc->frame_control = fc;
 953         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 954         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 955         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 956         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 957
 958         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 959         ieee80211_tx_skb(sdata, skb);
 960 }
 961
 962 /* spectrum management related things */
 963 static void ieee80211_chswitch_work(struct work_struct *work)
 964 {
 965         struct ieee80211_sub_if_data *sdata =
 966                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 967         struct ieee80211_local *local = sdata->local;
 968         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 969         int ret;
 970
 971         if (!ieee80211_sdata_running(sdata))
 972                 return;
 973
 974         sdata_lock(sdata);
 975         mutex_lock(&local->mtx);
 976         mutex_lock(&local->chanctx_mtx);
 977
 978         if (!ifmgd->associated)
 979                 goto out;
 980
 981         if (!sdata->vif.csa_active)
 982                 goto out;
 983
 984         /*
 985          * using reservation isn't immediate as it may be deferred until later
 986          * with multi-vif. once reservation is complete it will re-schedule the
 987          * work with no reserved_chanctx so verify chandef to check if it
 988          * completed successfully
 989          */
 990
 991         if (sdata->reserved_chanctx) {
 992                 /*
 993                  * with multi-vif csa driver may call ieee80211_csa_finish()
 994                  * many times while waiting for other interfaces to use their
 995                  * reservations
 996                  */
 997                 if (sdata->reserved_ready)
 998                         goto out;
 999
1000                 ret = ieee80211_vif_use_reserved_context(sdata);
1001                 if (ret) {
1002                         sdata_info(sdata,
1003                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1004                                    ret);
1005                         ieee80211_queue_work(&sdata->local->hw,
1006                                              &ifmgd->csa_connection_drop_work);
1007                         goto out;
1008                 }
1009
1010                 goto out;
1011         }
1012
1013         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1014                                         &sdata->csa_chandef)) {
1015                 sdata_info(sdata,
1016                            "failed to finalize channel switch, disconnecting\n");
1017                 ieee80211_queue_work(&sdata->local->hw,
1018                                      &ifmgd->csa_connection_drop_work);
1019                 goto out;
1020         }
1021
1022         /* XXX: shouldn't really modify cfg80211-owned data! */
1023         ifmgd->associated->channel = sdata->csa_chandef.chan;
1024
1025         ifmgd->csa_waiting_bcn = true;
1026
1027         ieee80211_sta_reset_beacon_monitor(sdata);
1028         ieee80211_sta_reset_conn_monitor(sdata);
1029
1030 out:
1031         mutex_unlock(&local->chanctx_mtx);
1032         mutex_unlock(&local->mtx);
1033         sdata_unlock(sdata);
1034 }
1035
1036 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1037 {
1038         struct ieee80211_local *local = sdata->local;
1039         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1040         int ret;
1041
1042         sdata_assert_lock(sdata);
1043
1044         WARN_ON(!sdata->vif.csa_active);
1045
1046         if (sdata->csa_block_tx) {
1047                 ieee80211_wake_vif_queues(local, sdata,
1048                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1049                 sdata->csa_block_tx = false;
1050         }
1051
1052         sdata->vif.csa_active = false;
1053         ifmgd->csa_waiting_bcn = false;
1054
1055         ret = drv_post_channel_switch(sdata);
1056         if (ret) {
1057                 sdata_info(sdata,
1058                            "driver post channel switch failed, disconnecting\n");
1059                 ieee80211_queue_work(&local->hw,
1060                                      &ifmgd->csa_connection_drop_work);
1061                 return;
1062         }
1063
1064         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1065 }
1066
1067 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1068 {
1069         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1070         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1071
1072         trace_api_chswitch_done(sdata, success);
1073         if (!success) {
1074                 sdata_info(sdata,
1075                            "driver channel switch failed, disconnecting\n");
1076                 ieee80211_queue_work(&sdata->local->hw,
1077                                      &ifmgd->csa_connection_drop_work);
1078         } else {
1079                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1080         }
1081 }
1082 EXPORT_SYMBOL(ieee80211_chswitch_done);
1083
1084 static void ieee80211_chswitch_timer(unsigned long data)
1085 {
1086         struct ieee80211_sub_if_data *sdata =
1087                 (struct ieee80211_sub_if_data *) data;
1088
1089         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1090 }
1091
1092 static void
1093 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1094                                  u64 timestamp, u32 device_timestamp,
1095                                  struct ieee802_11_elems *elems,
1096                                  bool beacon)
1097 {
1098         struct ieee80211_local *local = sdata->local;
1099         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1100         struct cfg80211_bss *cbss = ifmgd->associated;
1101         struct ieee80211_chanctx_conf *conf;
1102         struct ieee80211_chanctx *chanctx;
1103         enum ieee80211_band current_band;
1104         struct ieee80211_csa_ie csa_ie;
1105         struct ieee80211_channel_switch ch_switch;
1106         int res;
1107
1108         sdata_assert_lock(sdata);
1109
1110         if (!cbss)
1111                 return;
1112
1113         if (local->scanning)
1114                 return;
1115
1116         /* disregard subsequent announcements if we are already processing */
1117         if (sdata->vif.csa_active)
1118                 return;
1119
1120         current_band = cbss->channel->band;
1121         memset(&csa_ie, 0, sizeof(csa_ie));
1122         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1123                                            ifmgd->flags,
1124                                            ifmgd->associated->bssid, &csa_ie);
1125         if (res < 0)
1126                 ieee80211_queue_work(&local->hw,
1127                                      &ifmgd->csa_connection_drop_work);
1128         if (res)
1129                 return;
1130
1131         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1132                                      IEEE80211_CHAN_DISABLED)) {
1133                 sdata_info(sdata,
1134                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1135                            ifmgd->associated->bssid,
1136                            csa_ie.chandef.chan->center_freq,
1137                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1138                            csa_ie.chandef.center_freq2);
1139                 ieee80211_queue_work(&local->hw,
1140                                      &ifmgd->csa_connection_drop_work);
1141                 return;
1142         }
1143
1144         if (cfg80211_chandef_identical(&csa_ie.chandef,
1145                                        &sdata->vif.bss_conf.chandef)) {
1146                 if (ifmgd->csa_ignored_same_chan)
1147                         return;
1148                 sdata_info(sdata,
1149                            "AP %pM tries to chanswitch to same channel, ignore\n",
1150                            ifmgd->associated->bssid);
1151                 ifmgd->csa_ignored_same_chan = true;
1152                 return;
1153         }
1154
1155         /*
1156          * Drop all TDLS peers - either we disconnect or move to a different
1157          * channel from this point on. There's no telling what our peer will do.
1158          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1159          * have an incompatible wider chandef.
1160          */
1161         ieee80211_teardown_tdls_peers(sdata);
1162
1163         mutex_lock(&local->mtx);
1164         mutex_lock(&local->chanctx_mtx);
1165         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1166                                          lockdep_is_held(&local->chanctx_mtx));
1167         if (!conf) {
1168                 sdata_info(sdata,
1169                            "no channel context assigned to vif?, disconnecting\n");
1170                 goto drop_connection;
1171         }
1172
1173         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1174
1175         if (local->use_chanctx &&
1176             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1177                 sdata_info(sdata,
1178                            "driver doesn't support chan-switch with channel contexts\n");
1179                 goto drop_connection;
1180         }
1181
1182         ch_switch.timestamp = timestamp;
1183         ch_switch.device_timestamp = device_timestamp;
1184         ch_switch.block_tx = csa_ie.mode;
1185         ch_switch.chandef = csa_ie.chandef;
1186         ch_switch.count = csa_ie.count;
1187
1188         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1189                 sdata_info(sdata,
1190                            "preparing for channel switch failed, disconnecting\n");
1191                 goto drop_connection;
1192         }
1193
1194         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1195                                             chanctx->mode, false);
1196         if (res) {
1197                 sdata_info(sdata,
1198                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1199                            res);
1200                 goto drop_connection;
1201         }
1202         mutex_unlock(&local->chanctx_mtx);
1203
1204         sdata->vif.csa_active = true;
1205         sdata->csa_chandef = csa_ie.chandef;
1206         sdata->csa_block_tx = csa_ie.mode;
1207         ifmgd->csa_ignored_same_chan = false;
1208
1209         if (sdata->csa_block_tx)
1210                 ieee80211_stop_vif_queues(local, sdata,
1211                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1212         mutex_unlock(&local->mtx);
1213
1214         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1215                                           csa_ie.count);
1216
1217         if (local->ops->channel_switch) {
1218                 /* use driver's channel switch callback */
1219                 drv_channel_switch(local, sdata, &ch_switch);
1220                 return;
1221         }
1222
1223         /* channel switch handled in software */
1224         if (csa_ie.count <= 1)
1225                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1226         else
1227                 mod_timer(&ifmgd->chswitch_timer,
1228                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1229                                          cbss->beacon_interval));
1230         return;
1231  drop_connection:
1232         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1233         mutex_unlock(&local->chanctx_mtx);
1234         mutex_unlock(&local->mtx);
1235 }
1236
1237 static bool
1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1239                                  struct ieee80211_channel *channel,
1240                                  const u8 *country_ie, u8 country_ie_len,
1241                                  const u8 *pwr_constr_elem,
1242                                  int *chan_pwr, int *pwr_reduction)
1243 {
1244         struct ieee80211_country_ie_triplet *triplet;
1245         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246         int i, chan_increment;
1247         bool have_chan_pwr = false;
1248
1249         /* Invalid IE */
1250         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1251                 return false;
1252
1253         triplet = (void *)(country_ie + 3);
1254         country_ie_len -= 3;
1255
1256         switch (channel->band) {
1257         default:
1258                 WARN_ON_ONCE(1);
1259                 /* fall through */
1260         case IEEE80211_BAND_2GHZ:
1261         case IEEE80211_BAND_60GHZ:
1262                 chan_increment = 1;
1263                 break;
1264         case IEEE80211_BAND_5GHZ:
1265                 chan_increment = 4;
1266                 break;
1267         }
1268
1269         /* find channel */
1270         while (country_ie_len >= 3) {
1271                 u8 first_channel = triplet->chans.first_channel;
1272
1273                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1274                         goto next;
1275
1276                 for (i = 0; i < triplet->chans.num_channels; i++) {
1277                         if (first_channel + i * chan_increment == chan) {
1278                                 have_chan_pwr = true;
1279                                 *chan_pwr = triplet->chans.max_power;
1280                                 break;
1281                         }
1282                 }
1283                 if (have_chan_pwr)
1284                         break;
1285
1286  next:
1287                 triplet++;
1288                 country_ie_len -= 3;
1289         }
1290
1291         if (have_chan_pwr && pwr_constr_elem)
1292                 *pwr_reduction = *pwr_constr_elem;
1293         else
1294                 *pwr_reduction = 0;
1295
1296         return have_chan_pwr;
1297 }
1298
1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1300                                       struct ieee80211_channel *channel,
1301                                       const u8 *cisco_dtpc_ie,
1302                                       int *pwr_level)
1303 {
1304         /* From practical testing, the first data byte of the DTPC element
1305          * seems to contain the requested dBm level, and the CLI on Cisco
1306          * APs clearly state the range is -127 to 127 dBm, which indicates
1307          * a signed byte, although it seemingly never actually goes negative.
1308          * The other byte seems to always be zero.
1309          */
1310         *pwr_level = (__s8)cisco_dtpc_ie[4];
1311 }
1312
1313 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1314                                        struct ieee80211_channel *channel,
1315                                        struct ieee80211_mgmt *mgmt,
1316                                        const u8 *country_ie, u8 country_ie_len,
1317                                        const u8 *pwr_constr_ie,
1318                                        const u8 *cisco_dtpc_ie)
1319 {
1320         bool has_80211h_pwr = false, has_cisco_pwr = false;
1321         int chan_pwr = 0, pwr_reduction_80211h = 0;
1322         int pwr_level_cisco, pwr_level_80211h;
1323         int new_ap_level;
1324         __le16 capab = mgmt->u.probe_resp.capab_info;
1325
1326         if (country_ie &&
1327             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1328              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1329                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1330                         sdata, channel, country_ie, country_ie_len,
1331                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1332                 pwr_level_80211h =
1333                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1334         }
1335
1336         if (cisco_dtpc_ie) {
1337                 ieee80211_find_cisco_dtpc(
1338                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1339                 has_cisco_pwr = true;
1340         }
1341
1342         if (!has_80211h_pwr && !has_cisco_pwr)
1343                 return 0;
1344
1345         /* If we have both 802.11h and Cisco DTPC, apply both limits
1346          * by picking the smallest of the two power levels advertised.
1347          */
1348         if (has_80211h_pwr &&
1349             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1350                 new_ap_level = pwr_level_80211h;
1351
1352                 if (sdata->ap_power_level == new_ap_level)
1353                         return 0;
1354
1355                 sdata_dbg(sdata,
1356                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1357                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1358                           sdata->u.mgd.bssid);
1359         } else {  /* has_cisco_pwr is always true here. */
1360                 new_ap_level = pwr_level_cisco;
1361
1362                 if (sdata->ap_power_level == new_ap_level)
1363                         return 0;
1364
1365                 sdata_dbg(sdata,
1366                           "Limiting TX power to %d dBm as advertised by %pM\n",
1367                           pwr_level_cisco, sdata->u.mgd.bssid);
1368         }
1369
1370         sdata->ap_power_level = new_ap_level;
1371         if (__ieee80211_recalc_txpower(sdata))
1372                 return BSS_CHANGED_TXPOWER;
1373         return 0;
1374 }
1375
1376 /* powersave */
1377 static void ieee80211_enable_ps(struct ieee80211_local *local,
1378                                 struct ieee80211_sub_if_data *sdata)
1379 {
1380         struct ieee80211_conf *conf = &local->hw.conf;
1381
1382         /*
1383          * If we are scanning right now then the parameters will
1384          * take effect when scan finishes.
1385          */
1386         if (local->scanning)
1387                 return;
1388
1389         if (conf->dynamic_ps_timeout > 0 &&
1390             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1391                 mod_timer(&local->dynamic_ps_timer, jiffies +
1392                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1393         } else {
1394                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1395                         ieee80211_send_nullfunc(local, sdata, true);
1396
1397                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1398                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1399                         return;
1400
1401                 conf->flags |= IEEE80211_CONF_PS;
1402                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1403         }
1404 }
1405
1406 static void ieee80211_change_ps(struct ieee80211_local *local)
1407 {
1408         struct ieee80211_conf *conf = &local->hw.conf;
1409
1410         if (local->ps_sdata) {
1411                 ieee80211_enable_ps(local, local->ps_sdata);
1412         } else if (conf->flags & IEEE80211_CONF_PS) {
1413                 conf->flags &= ~IEEE80211_CONF_PS;
1414                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1415                 del_timer_sync(&local->dynamic_ps_timer);
1416                 cancel_work_sync(&local->dynamic_ps_enable_work);
1417         }
1418 }
1419
1420 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1421 {
1422         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1423         struct sta_info *sta = NULL;
1424         bool authorized = false;
1425
1426         if (!mgd->powersave)
1427                 return false;
1428
1429         if (mgd->broken_ap)
1430                 return false;
1431
1432         if (!mgd->associated)
1433                 return false;
1434
1435         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1436                 return false;
1437
1438         if (!mgd->have_beacon)
1439                 return false;
1440
1441         rcu_read_lock();
1442         sta = sta_info_get(sdata, mgd->bssid);
1443         if (sta)
1444                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1445         rcu_read_unlock();
1446
1447         return authorized;
1448 }
1449
1450 /* need to hold RTNL or interface lock */
1451 void ieee80211_recalc_ps(struct ieee80211_local *local)
1452 {
1453         struct ieee80211_sub_if_data *sdata, *found = NULL;
1454         int count = 0;
1455         int timeout;
1456
1457         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1458                 local->ps_sdata = NULL;
1459                 return;
1460         }
1461
1462         list_for_each_entry(sdata, &local->interfaces, list) {
1463                 if (!ieee80211_sdata_running(sdata))
1464                         continue;
1465                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1466                         /* If an AP vif is found, then disable PS
1467                          * by setting the count to zero thereby setting
1468                          * ps_sdata to NULL.
1469                          */
1470                         count = 0;
1471                         break;
1472                 }
1473                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1474                         continue;
1475                 found = sdata;
1476                 count++;
1477         }
1478
1479         if (count == 1 && ieee80211_powersave_allowed(found)) {
1480                 u8 dtimper = found->u.mgd.dtim_period;
1481                 s32 beaconint_us;
1482
1483                 beaconint_us = ieee80211_tu_to_usec(
1484                                         found->vif.bss_conf.beacon_int);
1485
1486                 timeout = local->dynamic_ps_forced_timeout;
1487                 if (timeout < 0)
1488                         timeout = 100;
1489                 local->hw.conf.dynamic_ps_timeout = timeout;
1490
1491                 /* If the TIM IE is invalid, pretend the value is 1 */
1492                 if (!dtimper)
1493                         dtimper = 1;
1494
1495                 local->hw.conf.ps_dtim_period = dtimper;
1496                 local->ps_sdata = found;
1497         } else {
1498                 local->ps_sdata = NULL;
1499         }
1500
1501         ieee80211_change_ps(local);
1502 }
1503
1504 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1505 {
1506         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1507
1508         if (sdata->vif.bss_conf.ps != ps_allowed) {
1509                 sdata->vif.bss_conf.ps = ps_allowed;
1510                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1511         }
1512 }
1513
1514 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1515 {
1516         struct ieee80211_local *local =
1517                 container_of(work, struct ieee80211_local,
1518                              dynamic_ps_disable_work);
1519
1520         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1521                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1522                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1523         }
1524
1525         ieee80211_wake_queues_by_reason(&local->hw,
1526                                         IEEE80211_MAX_QUEUE_MAP,
1527                                         IEEE80211_QUEUE_STOP_REASON_PS,
1528                                         false);
1529 }
1530
1531 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1532 {
1533         struct ieee80211_local *local =
1534                 container_of(work, struct ieee80211_local,
1535                              dynamic_ps_enable_work);
1536         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1537         struct ieee80211_if_managed *ifmgd;
1538         unsigned long flags;
1539         int q;
1540
1541         /* can only happen when PS was just disabled anyway */
1542         if (!sdata)
1543                 return;
1544
1545         ifmgd = &sdata->u.mgd;
1546
1547         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1548                 return;
1549
1550         if (local->hw.conf.dynamic_ps_timeout > 0) {
1551                 /* don't enter PS if TX frames are pending */
1552                 if (drv_tx_frames_pending(local)) {
1553                         mod_timer(&local->dynamic_ps_timer, jiffies +
1554                                   msecs_to_jiffies(
1555                                   local->hw.conf.dynamic_ps_timeout));
1556                         return;
1557                 }
1558
1559                 /*
1560                  * transmission can be stopped by others which leads to
1561                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1562                  * is not the actual idle state.
1563                  */
1564                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1565                 for (q = 0; q < local->hw.queues; q++) {
1566                         if (local->queue_stop_reasons[q]) {
1567                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1568                                                        flags);
1569                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1570                                           msecs_to_jiffies(
1571                                           local->hw.conf.dynamic_ps_timeout));
1572                                 return;
1573                         }
1574                 }
1575                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1576         }
1577
1578         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1579             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1580                 if (drv_tx_frames_pending(local)) {
1581                         mod_timer(&local->dynamic_ps_timer, jiffies +
1582                                   msecs_to_jiffies(
1583                                   local->hw.conf.dynamic_ps_timeout));
1584                 } else {
1585                         ieee80211_send_nullfunc(local, sdata, true);
1586                         /* Flush to get the tx status of nullfunc frame */
1587                         ieee80211_flush_queues(local, sdata, false);
1588                 }
1589         }
1590
1591         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1592               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1593             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1594                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1595                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1596                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1597         }
1598 }
1599
1600 void ieee80211_dynamic_ps_timer(unsigned long data)
1601 {
1602         struct ieee80211_local *local = (void *) data;
1603
1604         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1605 }
1606
1607 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1608 {
1609         struct delayed_work *delayed_work = to_delayed_work(work);
1610         struct ieee80211_sub_if_data *sdata =
1611                 container_of(delayed_work, struct ieee80211_sub_if_data,
1612                              dfs_cac_timer_work);
1613         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1614
1615         mutex_lock(&sdata->local->mtx);
1616         if (sdata->wdev.cac_started) {
1617                 ieee80211_vif_release_channel(sdata);
1618                 cfg80211_cac_event(sdata->dev, &chandef,
1619                                    NL80211_RADAR_CAC_FINISHED,
1620                                    GFP_KERNEL);
1621         }
1622         mutex_unlock(&sdata->local->mtx);
1623 }
1624
1625 static bool
1626 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1627 {
1628         struct ieee80211_local *local = sdata->local;
1629         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1630         bool ret = false;
1631         int ac;
1632
1633         if (local->hw.queues < IEEE80211_NUM_ACS)
1634                 return false;
1635
1636         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1637                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1638                 int non_acm_ac;
1639                 unsigned long now = jiffies;
1640
1641                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1642                     tx_tspec->admitted_time &&
1643                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1644                         tx_tspec->consumed_tx_time = 0;
1645                         tx_tspec->time_slice_start = now;
1646
1647                         if (tx_tspec->downgraded)
1648                                 tx_tspec->action =
1649                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1650                 }
1651
1652                 switch (tx_tspec->action) {
1653                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1654                         /* take the original parameters */
1655                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1656                                 sdata_err(sdata,
1657                                           "failed to set TX queue parameters for queue %d\n",
1658                                           ac);
1659                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1660                         tx_tspec->downgraded = false;
1661                         ret = true;
1662                         break;
1663                 case TX_TSPEC_ACTION_DOWNGRADE:
1664                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1665                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1666                                 ret = true;
1667                                 break;
1668                         }
1669                         /* downgrade next lower non-ACM AC */
1670                         for (non_acm_ac = ac + 1;
1671                              non_acm_ac < IEEE80211_NUM_ACS;
1672                              non_acm_ac++)
1673                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1674                                         break;
1675                         /* The loop will result in using BK even if it requires
1676                          * admission control, such configuration makes no sense
1677                          * and we have to transmit somehow - the AC selection
1678                          * does the same thing.
1679                          */
1680                         if (drv_conf_tx(local, sdata, ac,
1681                                         &sdata->tx_conf[non_acm_ac]))
1682                                 sdata_err(sdata,
1683                                           "failed to set TX queue parameters for queue %d\n",
1684                                           ac);
1685                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1686                         ret = true;
1687                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1688                                 tx_tspec->time_slice_start + HZ - now + 1);
1689                         break;
1690                 case TX_TSPEC_ACTION_NONE:
1691                         /* nothing now */
1692                         break;
1693                 }
1694         }
1695
1696         return ret;
1697 }
1698
1699 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1700 {
1701         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1702                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1703 }
1704
1705 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1706 {
1707         struct ieee80211_sub_if_data *sdata;
1708
1709         sdata = container_of(work, struct ieee80211_sub_if_data,
1710                              u.mgd.tx_tspec_wk.work);
1711         ieee80211_sta_handle_tspec_ac_params(sdata);
1712 }
1713
1714 /* MLME */
1715 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1716                                      struct ieee80211_sub_if_data *sdata,
1717                                      const u8 *wmm_param, size_t wmm_param_len)
1718 {
1719         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1720         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1721         size_t left;
1722         int count, ac;
1723         const u8 *pos;
1724         u8 uapsd_queues = 0;
1725
1726         if (!local->ops->conf_tx)
1727                 return false;
1728
1729         if (local->hw.queues < IEEE80211_NUM_ACS)
1730                 return false;
1731
1732         if (!wmm_param)
1733                 return false;
1734
1735         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1736                 return false;
1737
1738         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1739                 uapsd_queues = ifmgd->uapsd_queues;
1740
1741         count = wmm_param[6] & 0x0f;
1742         if (count == ifmgd->wmm_last_param_set)
1743                 return false;
1744         ifmgd->wmm_last_param_set = count;
1745
1746         pos = wmm_param + 8;
1747         left = wmm_param_len - 8;
1748
1749         memset(&params, 0, sizeof(params));
1750
1751         sdata->wmm_acm = 0;
1752         for (; left >= 4; left -= 4, pos += 4) {
1753                 int aci = (pos[0] >> 5) & 0x03;
1754                 int acm = (pos[0] >> 4) & 0x01;
1755                 bool uapsd = false;
1756
1757                 switch (aci) {
1758                 case 1: /* AC_BK */
1759                         ac = IEEE80211_AC_BK;
1760                         if (acm)
1761                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1762                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1763                                 uapsd = true;
1764                         break;
1765                 case 2: /* AC_VI */
1766                         ac = IEEE80211_AC_VI;
1767                         if (acm)
1768                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1769                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1770                                 uapsd = true;
1771                         break;
1772                 case 3: /* AC_VO */
1773                         ac = IEEE80211_AC_VO;
1774                         if (acm)
1775                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1776                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1777                                 uapsd = true;
1778                         break;
1779                 case 0: /* AC_BE */
1780                 default:
1781                         ac = IEEE80211_AC_BE;
1782                         if (acm)
1783                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1784                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1785                                 uapsd = true;
1786                         break;
1787                 }
1788
1789                 params[ac].aifs = pos[0] & 0x0f;
1790
1791                 if (params[ac].aifs < 2) {
1792                         sdata_info(sdata,
1793                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1794                                    params[ac].aifs, aci);
1795                         params[ac].aifs = 2;
1796                 }
1797                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1798                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1799                 params[ac].txop = get_unaligned_le16(pos + 2);
1800                 params[ac].acm = acm;
1801                 params[ac].uapsd = uapsd;
1802
1803                 if (params[ac].cw_min > params[ac].cw_max) {
1804                         sdata_info(sdata,
1805                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1806                                    params[ac].cw_min, params[ac].cw_max, aci);
1807                         return false;
1808                 }
1809         }
1810
1811         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1812                 mlme_dbg(sdata,
1813                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1814                          ac, params[ac].acm,
1815                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1816                          params[ac].txop, params[ac].uapsd,
1817                          ifmgd->tx_tspec[ac].downgraded);
1818                 sdata->tx_conf[ac] = params[ac];
1819                 if (!ifmgd->tx_tspec[ac].downgraded &&
1820                     drv_conf_tx(local, sdata, ac, &params[ac]))
1821                         sdata_err(sdata,
1822                                   "failed to set TX queue parameters for AC %d\n",
1823                                   ac);
1824         }
1825
1826         /* enable WMM or activate new settings */
1827         sdata->vif.bss_conf.qos = true;
1828         return true;
1829 }
1830
1831 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1832 {
1833         lockdep_assert_held(&sdata->local->mtx);
1834
1835         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1836         ieee80211_run_deferred_scan(sdata->local);
1837 }
1838
1839 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1840 {
1841         mutex_lock(&sdata->local->mtx);
1842         __ieee80211_stop_poll(sdata);
1843         mutex_unlock(&sdata->local->mtx);
1844 }
1845
1846 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1847                                            u16 capab, bool erp_valid, u8 erp)
1848 {
1849         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1850         u32 changed = 0;
1851         bool use_protection;
1852         bool use_short_preamble;
1853         bool use_short_slot;
1854
1855         if (erp_valid) {
1856                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1857                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1858         } else {
1859                 use_protection = false;
1860                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1861         }
1862
1863         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1864         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1865                 use_short_slot = true;
1866
1867         if (use_protection != bss_conf->use_cts_prot) {
1868                 bss_conf->use_cts_prot = use_protection;
1869                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1870         }
1871
1872         if (use_short_preamble != bss_conf->use_short_preamble) {
1873                 bss_conf->use_short_preamble = use_short_preamble;
1874                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1875         }
1876
1877         if (use_short_slot != bss_conf->use_short_slot) {
1878                 bss_conf->use_short_slot = use_short_slot;
1879                 changed |= BSS_CHANGED_ERP_SLOT;
1880         }
1881
1882         return changed;
1883 }
1884
1885 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1886                                      struct cfg80211_bss *cbss,
1887                                      u32 bss_info_changed)
1888 {
1889         struct ieee80211_bss *bss = (void *)cbss->priv;
1890         struct ieee80211_local *local = sdata->local;
1891         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1892
1893         bss_info_changed |= BSS_CHANGED_ASSOC;
1894         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1895                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1896
1897         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1898                 beacon_loss_count * bss_conf->beacon_int));
1899
1900         sdata->u.mgd.associated = cbss;
1901         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1902
1903         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1904
1905         if (sdata->vif.p2p ||
1906             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1907                 const struct cfg80211_bss_ies *ies;
1908
1909                 rcu_read_lock();
1910                 ies = rcu_dereference(cbss->ies);
1911                 if (ies) {
1912                         int ret;
1913
1914                         ret = cfg80211_get_p2p_attr(
1915                                         ies->data, ies->len,
1916                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1917                                         (u8 *) &bss_conf->p2p_noa_attr,
1918                                         sizeof(bss_conf->p2p_noa_attr));
1919                         if (ret >= 2) {
1920                                 sdata->u.mgd.p2p_noa_index =
1921                                         bss_conf->p2p_noa_attr.index;
1922                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1923                         }
1924                 }
1925                 rcu_read_unlock();
1926         }
1927
1928         /* just to be sure */
1929         ieee80211_stop_poll(sdata);
1930
1931         ieee80211_led_assoc(local, 1);
1932
1933         if (sdata->u.mgd.have_beacon) {
1934                 /*
1935                  * If the AP is buggy we may get here with no DTIM period
1936                  * known, so assume it's 1 which is the only safe assumption
1937                  * in that case, although if the TIM IE is broken powersave
1938                  * probably just won't work at all.
1939                  */
1940                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1941                 bss_conf->beacon_rate = bss->beacon_rate;
1942                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1943         } else {
1944                 bss_conf->beacon_rate = NULL;
1945                 bss_conf->dtim_period = 0;
1946         }
1947
1948         bss_conf->assoc = 1;
1949
1950         /* Tell the driver to monitor connection quality (if supported) */
1951         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1952             bss_conf->cqm_rssi_thold)
1953                 bss_info_changed |= BSS_CHANGED_CQM;
1954
1955         /* Enable ARP filtering */
1956         if (bss_conf->arp_addr_cnt)
1957                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1958
1959         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1960
1961         mutex_lock(&local->iflist_mtx);
1962         ieee80211_recalc_ps(local);
1963         mutex_unlock(&local->iflist_mtx);
1964
1965         ieee80211_recalc_smps(sdata);
1966         ieee80211_recalc_ps_vif(sdata);
1967
1968         netif_carrier_on(sdata->dev);
1969 }
1970
1971 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1972                                    u16 stype, u16 reason, bool tx,
1973                                    u8 *frame_buf)
1974 {
1975         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1976         struct ieee80211_local *local = sdata->local;
1977         u32 changed = 0;
1978
1979         sdata_assert_lock(sdata);
1980
1981         if (WARN_ON_ONCE(tx && !frame_buf))
1982                 return;
1983
1984         if (WARN_ON(!ifmgd->associated))
1985                 return;
1986
1987         ieee80211_stop_poll(sdata);
1988
1989         ifmgd->associated = NULL;
1990         netif_carrier_off(sdata->dev);
1991
1992         /*
1993          * if we want to get out of ps before disassoc (why?) we have
1994          * to do it before sending disassoc, as otherwise the null-packet
1995          * won't be valid.
1996          */
1997         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1998                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1999                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2000         }
2001         local->ps_sdata = NULL;
2002
2003         /* disable per-vif ps */
2004         ieee80211_recalc_ps_vif(sdata);
2005
2006         /* make sure ongoing transmission finishes */
2007         synchronize_net();
2008
2009         /*
2010          * drop any frame before deauth/disassoc, this can be data or
2011          * management frame. Since we are disconnecting, we should not
2012          * insist sending these frames which can take time and delay
2013          * the disconnection and possible the roaming.
2014          */
2015         if (tx)
2016                 ieee80211_flush_queues(local, sdata, true);
2017
2018         /* deauthenticate/disassociate now */
2019         if (tx || frame_buf)
2020                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2021                                                reason, tx, frame_buf);
2022
2023         /* flush out frame - make sure the deauth was actually sent */
2024         if (tx)
2025                 ieee80211_flush_queues(local, sdata, false);
2026
2027         /* clear bssid only after building the needed mgmt frames */
2028         eth_zero_addr(ifmgd->bssid);
2029
2030         /* remove AP and TDLS peers */
2031         sta_info_flush(sdata);
2032
2033         /* finally reset all BSS / config parameters */
2034         changed |= ieee80211_reset_erp_info(sdata);
2035
2036         ieee80211_led_assoc(local, 0);
2037         changed |= BSS_CHANGED_ASSOC;
2038         sdata->vif.bss_conf.assoc = false;
2039
2040         ifmgd->p2p_noa_index = -1;
2041         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2042                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2043
2044         /* on the next assoc, re-program HT/VHT parameters */
2045         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2046         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2047         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2048         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2049
2050         /* reset MU-MIMO ownership and group data */
2051         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2052                sizeof(sdata->vif.bss_conf.mu_group.membership));
2053         memset(sdata->vif.bss_conf.mu_group.position, 0,
2054                sizeof(sdata->vif.bss_conf.mu_group.position));
2055         changed |= BSS_CHANGED_MU_GROUPS;
2056         sdata->vif.mu_mimo_owner = false;
2057
2058         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2059
2060         del_timer_sync(&local->dynamic_ps_timer);
2061         cancel_work_sync(&local->dynamic_ps_enable_work);
2062
2063         /* Disable ARP filtering */
2064         if (sdata->vif.bss_conf.arp_addr_cnt)
2065                 changed |= BSS_CHANGED_ARP_FILTER;
2066
2067         sdata->vif.bss_conf.qos = false;
2068         changed |= BSS_CHANGED_QOS;
2069
2070         /* The BSSID (not really interesting) and HT changed */
2071         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2072         ieee80211_bss_info_change_notify(sdata, changed);
2073
2074         /* disassociated - set to defaults now */
2075         ieee80211_set_wmm_default(sdata, false, false);
2076
2077         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2078         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2079         del_timer_sync(&sdata->u.mgd.timer);
2080         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2081
2082         sdata->vif.bss_conf.dtim_period = 0;
2083         sdata->vif.bss_conf.beacon_rate = NULL;
2084
2085         ifmgd->have_beacon = false;
2086
2087         ifmgd->flags = 0;
2088         mutex_lock(&local->mtx);
2089         ieee80211_vif_release_channel(sdata);
2090
2091         sdata->vif.csa_active = false;
2092         ifmgd->csa_waiting_bcn = false;
2093         ifmgd->csa_ignored_same_chan = false;
2094         if (sdata->csa_block_tx) {
2095                 ieee80211_wake_vif_queues(local, sdata,
2096                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2097                 sdata->csa_block_tx = false;
2098         }
2099         mutex_unlock(&local->mtx);
2100
2101         /* existing TX TSPEC sessions no longer exist */
2102         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2103         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2104
2105         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2106 }
2107
2108 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2109                              struct ieee80211_hdr *hdr)
2110 {
2111         /*
2112          * We can postpone the mgd.timer whenever receiving unicast frames
2113          * from AP because we know that the connection is working both ways
2114          * at that time. But multicast frames (and hence also beacons) must
2115          * be ignored here, because we need to trigger the timer during
2116          * data idle periods for sending the periodic probe request to the
2117          * AP we're connected to.
2118          */
2119         if (is_multicast_ether_addr(hdr->addr1))
2120                 return;
2121
2122         ieee80211_sta_reset_conn_monitor(sdata);
2123 }
2124
2125 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2126 {
2127         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2128         struct ieee80211_local *local = sdata->local;
2129
2130         mutex_lock(&local->mtx);
2131         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2132                 goto out;
2133
2134         __ieee80211_stop_poll(sdata);
2135
2136         mutex_lock(&local->iflist_mtx);
2137         ieee80211_recalc_ps(local);
2138         mutex_unlock(&local->iflist_mtx);
2139
2140         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2141                 goto out;
2142
2143         /*
2144          * We've received a probe response, but are not sure whether
2145          * we have or will be receiving any beacons or data, so let's
2146          * schedule the timers again, just in case.
2147          */
2148         ieee80211_sta_reset_beacon_monitor(sdata);
2149
2150         mod_timer(&ifmgd->conn_mon_timer,
2151                   round_jiffies_up(jiffies +
2152                                    IEEE80211_CONNECTION_IDLE_TIME));
2153 out:
2154         mutex_unlock(&local->mtx);
2155 }
2156
2157 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2158                                            struct ieee80211_hdr *hdr,
2159                                            u16 tx_time)
2160 {
2161         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2162         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2163         int ac = ieee80211_ac_from_tid(tid);
2164         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2165         unsigned long now = jiffies;
2166
2167         if (likely(!tx_tspec->admitted_time))
2168                 return;
2169
2170         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2171                 tx_tspec->consumed_tx_time = 0;
2172                 tx_tspec->time_slice_start = now;
2173
2174                 if (tx_tspec->downgraded) {
2175                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2176                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2177                 }
2178         }
2179
2180         if (tx_tspec->downgraded)
2181                 return;
2182
2183         tx_tspec->consumed_tx_time += tx_time;
2184
2185         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2186                 tx_tspec->downgraded = true;
2187                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2188                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2189         }
2190 }
2191
2192 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2193                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2194 {
2195         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2196
2197         if (!ieee80211_is_data(hdr->frame_control))
2198             return;
2199
2200         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2201             sdata->u.mgd.probe_send_count > 0) {
2202                 if (ack)
2203                         ieee80211_sta_reset_conn_monitor(sdata);
2204                 else
2205                         sdata->u.mgd.nullfunc_failed = true;
2206                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2207                 return;
2208         }
2209
2210         if (ack)
2211                 ieee80211_sta_reset_conn_monitor(sdata);
2212 }
2213
2214 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2215 {
2216         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2217         const u8 *ssid;
2218         u8 *dst = ifmgd->associated->bssid;
2219         u8 unicast_limit = max(1, max_probe_tries - 3);
2220
2221         /*
2222          * Try sending broadcast probe requests for the last three
2223          * probe requests after the first ones failed since some
2224          * buggy APs only support broadcast probe requests.
2225          */
2226         if (ifmgd->probe_send_count >= unicast_limit)
2227                 dst = NULL;
2228
2229         /*
2230          * When the hardware reports an accurate Tx ACK status, it's
2231          * better to send a nullfunc frame instead of a probe request,
2232          * as it will kick us off the AP quickly if we aren't associated
2233          * anymore. The timeout will be reset if the frame is ACKed by
2234          * the AP.
2235          */
2236         ifmgd->probe_send_count++;
2237
2238         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2239                 ifmgd->nullfunc_failed = false;
2240                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2241         } else {
2242                 int ssid_len;
2243
2244                 rcu_read_lock();
2245                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2246                 if (WARN_ON_ONCE(ssid == NULL))
2247                         ssid_len = 0;
2248                 else
2249                         ssid_len = ssid[1];
2250
2251                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2252                                          ssid + 2, ssid_len, NULL,
2253                                          0, (u32) -1, true, 0,
2254                                          ifmgd->associated->channel, false);
2255                 rcu_read_unlock();
2256         }
2257
2258         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2259         run_again(sdata, ifmgd->probe_timeout);
2260 }
2261
2262 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2263                                    bool beacon)
2264 {
2265         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2266         bool already = false;
2267
2268         if (!ieee80211_sdata_running(sdata))
2269                 return;
2270
2271         sdata_lock(sdata);
2272
2273         if (!ifmgd->associated)
2274                 goto out;
2275
2276         mutex_lock(&sdata->local->mtx);
2277
2278         if (sdata->local->tmp_channel || sdata->local->scanning) {
2279                 mutex_unlock(&sdata->local->mtx);
2280                 goto out;
2281         }
2282
2283         if (beacon) {
2284                 mlme_dbg_ratelimited(sdata,
2285                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2286                                      beacon_loss_count);
2287
2288                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2289         }
2290
2291         /*
2292          * The driver/our work has already reported this event or the
2293          * connection monitoring has kicked in and we have already sent
2294          * a probe request. Or maybe the AP died and the driver keeps
2295          * reporting until we disassociate...
2296          *
2297          * In either case we have to ignore the current call to this
2298          * function (except for setting the correct probe reason bit)
2299          * because otherwise we would reset the timer every time and
2300          * never check whether we received a probe response!
2301          */
2302         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2303                 already = true;
2304
2305         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2306
2307         mutex_unlock(&sdata->local->mtx);
2308
2309         if (already)
2310                 goto out;
2311
2312         mutex_lock(&sdata->local->iflist_mtx);
2313         ieee80211_recalc_ps(sdata->local);
2314         mutex_unlock(&sdata->local->iflist_mtx);
2315
2316         ifmgd->probe_send_count = 0;
2317         ieee80211_mgd_probe_ap_send(sdata);
2318  out:
2319         sdata_unlock(sdata);
2320 }
2321
2322 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2323                                           struct ieee80211_vif *vif)
2324 {
2325         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2326         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2327         struct cfg80211_bss *cbss;
2328         struct sk_buff *skb;
2329         const u8 *ssid;
2330         int ssid_len;
2331
2332         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2333                 return NULL;
2334
2335         sdata_assert_lock(sdata);
2336
2337         if (ifmgd->associated)
2338                 cbss = ifmgd->associated;
2339         else if (ifmgd->auth_data)
2340                 cbss = ifmgd->auth_data->bss;
2341         else if (ifmgd->assoc_data)
2342                 cbss = ifmgd->assoc_data->bss;
2343         else
2344                 return NULL;
2345
2346         rcu_read_lock();
2347         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2348         if (WARN_ON_ONCE(ssid == NULL))
2349                 ssid_len = 0;
2350         else
2351                 ssid_len = ssid[1];
2352
2353         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2354                                         (u32) -1, cbss->channel,
2355                                         ssid + 2, ssid_len,
2356                                         NULL, 0, true);
2357         rcu_read_unlock();
2358
2359         return skb;
2360 }
2361 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2362
2363 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2364                                         const u8 *buf, size_t len, bool tx,
2365                                         u16 reason)
2366 {
2367         struct ieee80211_event event = {
2368                 .type = MLME_EVENT,
2369                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2370                 .u.mlme.reason = reason,
2371         };
2372
2373         if (tx)
2374                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2375         else
2376                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2377
2378         drv_event_callback(sdata->local, sdata, &event);
2379 }
2380
2381 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2382 {
2383         struct ieee80211_local *local = sdata->local;
2384         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2385         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2386
2387         sdata_lock(sdata);
2388         if (!ifmgd->associated) {
2389                 sdata_unlock(sdata);
2390                 return;
2391         }
2392
2393         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2394                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2395                                true, frame_buf);
2396         mutex_lock(&local->mtx);
2397         sdata->vif.csa_active = false;
2398         ifmgd->csa_waiting_bcn = false;
2399         if (sdata->csa_block_tx) {
2400                 ieee80211_wake_vif_queues(local, sdata,
2401                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2402                 sdata->csa_block_tx = false;
2403         }
2404         mutex_unlock(&local->mtx);
2405
2406         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2407                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2408
2409         sdata_unlock(sdata);
2410 }
2411
2412 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2413 {
2414         struct ieee80211_sub_if_data *sdata =
2415                 container_of(work, struct ieee80211_sub_if_data,
2416                              u.mgd.beacon_connection_loss_work);
2417         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2418
2419         if (ifmgd->associated)
2420                 ifmgd->beacon_loss_count++;
2421
2422         if (ifmgd->connection_loss) {
2423                 sdata_info(sdata, "Connection to AP %pM lost\n",
2424                            ifmgd->bssid);
2425                 __ieee80211_disconnect(sdata);
2426         } else {
2427                 ieee80211_mgd_probe_ap(sdata, true);
2428         }
2429 }
2430
2431 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2432 {
2433         struct ieee80211_sub_if_data *sdata =
2434                 container_of(work, struct ieee80211_sub_if_data,
2435                              u.mgd.csa_connection_drop_work);
2436
2437         __ieee80211_disconnect(sdata);
2438 }
2439
2440 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2441 {
2442         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2443         struct ieee80211_hw *hw = &sdata->local->hw;
2444
2445         trace_api_beacon_loss(sdata);
2446
2447         sdata->u.mgd.connection_loss = false;
2448         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2449 }
2450 EXPORT_SYMBOL(ieee80211_beacon_loss);
2451
2452 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2453 {
2454         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2455         struct ieee80211_hw *hw = &sdata->local->hw;
2456
2457         trace_api_connection_loss(sdata);
2458
2459         sdata->u.mgd.connection_loss = true;
2460         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2461 }
2462 EXPORT_SYMBOL(ieee80211_connection_loss);
2463
2464
2465 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2466                                         bool assoc)
2467 {
2468         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2469
2470         sdata_assert_lock(sdata);
2471
2472         if (!assoc) {
2473                 /*
2474                  * we are not authenticated yet, the only timer that could be
2475                  * running is the timeout for the authentication response which
2476                  * which is not relevant anymore.
2477                  */
2478                 del_timer_sync(&sdata->u.mgd.timer);
2479                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2480
2481                 eth_zero_addr(sdata->u.mgd.bssid);
2482                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2483                 sdata->u.mgd.flags = 0;
2484                 mutex_lock(&sdata->local->mtx);
2485                 ieee80211_vif_release_channel(sdata);
2486                 mutex_unlock(&sdata->local->mtx);
2487         }
2488
2489         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2490         kfree(auth_data);
2491         sdata->u.mgd.auth_data = NULL;
2492 }
2493
2494 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2495                                          bool assoc)
2496 {
2497         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2498
2499         sdata_assert_lock(sdata);
2500
2501         if (!assoc) {
2502                 /*
2503                  * we are not associated yet, the only timer that could be
2504                  * running is the timeout for the association response which
2505                  * which is not relevant anymore.
2506                  */
2507                 del_timer_sync(&sdata->u.mgd.timer);
2508                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2509
2510                 eth_zero_addr(sdata->u.mgd.bssid);
2511                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2512                 sdata->u.mgd.flags = 0;
2513                 sdata->vif.mu_mimo_owner = false;
2514
2515                 mutex_lock(&sdata->local->mtx);
2516                 ieee80211_vif_release_channel(sdata);
2517                 mutex_unlock(&sdata->local->mtx);
2518         }
2519
2520         kfree(assoc_data);
2521         sdata->u.mgd.assoc_data = NULL;
2522 }
2523
2524 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2525                                      struct ieee80211_mgmt *mgmt, size_t len)
2526 {
2527         struct ieee80211_local *local = sdata->local;
2528         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2529         u8 *pos;
2530         struct ieee802_11_elems elems;
2531         u32 tx_flags = 0;
2532
2533         pos = mgmt->u.auth.variable;
2534         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2535         if (!elems.challenge)
2536                 return;
2537         auth_data->expected_transaction = 4;
2538         drv_mgd_prepare_tx(sdata->local, sdata);
2539         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2540                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2541                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2542         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2543                             elems.challenge - 2, elems.challenge_len + 2,
2544                             auth_data->bss->bssid, auth_data->bss->bssid,
2545                             auth_data->key, auth_data->key_len,
2546                             auth_data->key_idx, tx_flags);
2547 }
2548
2549 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2550                                    struct ieee80211_mgmt *mgmt, size_t len)
2551 {
2552         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2553         u8 bssid[ETH_ALEN];
2554         u16 auth_alg, auth_transaction, status_code;
2555         struct sta_info *sta;
2556         struct ieee80211_event event = {
2557                 .type = MLME_EVENT,
2558                 .u.mlme.data = AUTH_EVENT,
2559         };
2560
2561         sdata_assert_lock(sdata);
2562
2563         if (len < 24 + 6)
2564                 return;
2565
2566         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2567                 return;
2568
2569         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2570
2571         if (!ether_addr_equal(bssid, mgmt->bssid))
2572                 return;
2573
2574         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2575         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2576         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2577
2578         if (auth_alg != ifmgd->auth_data->algorithm ||
2579             auth_transaction != ifmgd->auth_data->expected_transaction) {
2580                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2581                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2582                            auth_transaction,
2583                            ifmgd->auth_data->expected_transaction);
2584                 return;
2585         }
2586
2587         if (status_code != WLAN_STATUS_SUCCESS) {
2588                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2589                            mgmt->sa, status_code);
2590                 ieee80211_destroy_auth_data(sdata, false);
2591                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2592                 event.u.mlme.status = MLME_DENIED;
2593                 event.u.mlme.reason = status_code;
2594                 drv_event_callback(sdata->local, sdata, &event);
2595                 return;
2596         }
2597
2598         switch (ifmgd->auth_data->algorithm) {
2599         case WLAN_AUTH_OPEN:
2600         case WLAN_AUTH_LEAP:
2601         case WLAN_AUTH_FT:
2602         case WLAN_AUTH_SAE:
2603                 break;
2604         case WLAN_AUTH_SHARED_KEY:
2605                 if (ifmgd->auth_data->expected_transaction != 4) {
2606                         ieee80211_auth_challenge(sdata, mgmt, len);
2607                         /* need another frame */
2608                         return;
2609                 }
2610                 break;
2611         default:
2612                 WARN_ONCE(1, "invalid auth alg %d",
2613                           ifmgd->auth_data->algorithm);
2614                 return;
2615         }
2616
2617         event.u.mlme.status = MLME_SUCCESS;
2618         drv_event_callback(sdata->local, sdata, &event);
2619         sdata_info(sdata, "authenticated\n");
2620         ifmgd->auth_data->done = true;
2621         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2622         ifmgd->auth_data->timeout_started = true;
2623         run_again(sdata, ifmgd->auth_data->timeout);
2624
2625         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2626             ifmgd->auth_data->expected_transaction != 2) {
2627                 /*
2628                  * Report auth frame to user space for processing since another
2629                  * round of Authentication frames is still needed.
2630                  */
2631                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2632                 return;
2633         }
2634
2635         /* move station state to auth */
2636         mutex_lock(&sdata->local->sta_mtx);
2637         sta = sta_info_get(sdata, bssid);
2638         if (!sta) {
2639                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2640                 goto out_err;
2641         }
2642         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2643                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2644                 goto out_err;
2645         }
2646         mutex_unlock(&sdata->local->sta_mtx);
2647
2648         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2649         return;
2650  out_err:
2651         mutex_unlock(&sdata->local->sta_mtx);
2652         /* ignore frame -- wait for timeout */
2653 }
2654
2655 #define case_WLAN(type) \
2656         case WLAN_REASON_##type: return #type
2657
2658 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2659 {
2660         switch (reason_code) {
2661         case_WLAN(UNSPECIFIED);
2662         case_WLAN(PREV_AUTH_NOT_VALID);
2663         case_WLAN(DEAUTH_LEAVING);
2664         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2665         case_WLAN(DISASSOC_AP_BUSY);
2666         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2667         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2668         case_WLAN(DISASSOC_STA_HAS_LEFT);
2669         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2670         case_WLAN(DISASSOC_BAD_POWER);
2671         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2672         case_WLAN(INVALID_IE);
2673         case_WLAN(MIC_FAILURE);
2674         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2675         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2676         case_WLAN(IE_DIFFERENT);
2677         case_WLAN(INVALID_GROUP_CIPHER);
2678         case_WLAN(INVALID_PAIRWISE_CIPHER);
2679         case_WLAN(INVALID_AKMP);
2680         case_WLAN(UNSUPP_RSN_VERSION);
2681         case_WLAN(INVALID_RSN_IE_CAP);
2682         case_WLAN(IEEE8021X_FAILED);
2683         case_WLAN(CIPHER_SUITE_REJECTED);
2684         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2685         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2686         case_WLAN(DISASSOC_LOW_ACK);
2687         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2688         case_WLAN(QSTA_LEAVE_QBSS);
2689         case_WLAN(QSTA_NOT_USE);
2690         case_WLAN(QSTA_REQUIRE_SETUP);
2691         case_WLAN(QSTA_TIMEOUT);
2692         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2693         case_WLAN(MESH_PEER_CANCELED);
2694         case_WLAN(MESH_MAX_PEERS);
2695         case_WLAN(MESH_CONFIG);
2696         case_WLAN(MESH_CLOSE);
2697         case_WLAN(MESH_MAX_RETRIES);
2698         case_WLAN(MESH_CONFIRM_TIMEOUT);
2699         case_WLAN(MESH_INVALID_GTK);
2700         case_WLAN(MESH_INCONSISTENT_PARAM);
2701         case_WLAN(MESH_INVALID_SECURITY);
2702         case_WLAN(MESH_PATH_ERROR);
2703         case_WLAN(MESH_PATH_NOFORWARD);
2704         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2705         case_WLAN(MAC_EXISTS_IN_MBSS);
2706         case_WLAN(MESH_CHAN_REGULATORY);
2707         case_WLAN(MESH_CHAN);
2708         default: return "<unknown>";
2709         }
2710 }
2711
2712 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2713                                      struct ieee80211_mgmt *mgmt, size_t len)
2714 {
2715         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2716         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2717
2718         sdata_assert_lock(sdata);
2719
2720         if (len < 24 + 2)
2721                 return;
2722
2723         if (ifmgd->associated &&
2724             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2725                 const u8 *bssid = ifmgd->associated->bssid;
2726
2727                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2728                            bssid, reason_code,
2729                            ieee80211_get_reason_code_string(reason_code));
2730
2731                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2732
2733                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2734                                             reason_code);
2735                 return;
2736         }
2737
2738         if (ifmgd->assoc_data &&
2739             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2740                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2741
2742                 sdata_info(sdata,
2743                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2744                            bssid, reason_code,
2745                            ieee80211_get_reason_code_string(reason_code));
2746
2747                 ieee80211_destroy_assoc_data(sdata, false);
2748
2749                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2750                 return;
2751         }
2752 }
2753
2754
2755 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2756                                        struct ieee80211_mgmt *mgmt, size_t len)
2757 {
2758         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2759         u16 reason_code;
2760
2761         sdata_assert_lock(sdata);
2762
2763         if (len < 24 + 2)
2764                 return;
2765
2766         if (!ifmgd->associated ||
2767             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2768                 return;
2769
2770         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2771
2772         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2773                    mgmt->sa, reason_code);
2774
2775         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2776
2777         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2778 }
2779
2780 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2781                                 u8 *supp_rates, unsigned int supp_rates_len,
2782                                 u32 *rates, u32 *basic_rates,
2783                                 bool *have_higher_than_11mbit,
2784                                 int *min_rate, int *min_rate_index,
2785                                 int shift, u32 rate_flags)
2786 {
2787         int i, j;
2788
2789         for (i = 0; i < supp_rates_len; i++) {
2790                 int rate = supp_rates[i] & 0x7f;
2791                 bool is_basic = !!(supp_rates[i] & 0x80);
2792
2793                 if ((rate * 5 * (1 << shift)) > 110)
2794                         *have_higher_than_11mbit = true;
2795
2796                 /*
2797                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2798                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2799                  *
2800                  * Note: Even through the membership selector and the basic
2801                  *       rate flag share the same bit, they are not exactly
2802                  *       the same.
2803                  */
2804                 if (!!(supp_rates[i] & 0x80) &&
2805                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2806                         continue;
2807
2808                 for (j = 0; j < sband->n_bitrates; j++) {
2809                         struct ieee80211_rate *br;
2810                         int brate;
2811
2812                         br = &sband->bitrates[j];
2813                         if ((rate_flags & br->flags) != rate_flags)
2814                                 continue;
2815
2816                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2817                         if (brate == rate) {
2818                                 *rates |= BIT(j);
2819                                 if (is_basic)
2820                                         *basic_rates |= BIT(j);
2821                                 if ((rate * 5) < *min_rate) {
2822                                         *min_rate = rate * 5;
2823                                         *min_rate_index = j;
2824                                 }
2825                                 break;
2826                         }
2827                 }
2828         }
2829 }
2830
2831 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2832                                     struct cfg80211_bss *cbss,
2833                                     struct ieee80211_mgmt *mgmt, size_t len)
2834 {
2835         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2836         struct ieee80211_local *local = sdata->local;
2837         struct ieee80211_supported_band *sband;
2838         struct sta_info *sta;
2839         u8 *pos;
2840         u16 capab_info, aid;
2841         struct ieee802_11_elems elems;
2842         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2843         const struct cfg80211_bss_ies *bss_ies = NULL;
2844         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2845         u32 changed = 0;
2846         int err;
2847         bool ret;
2848
2849         /* AssocResp and ReassocResp have identical structure */
2850
2851         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2852         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2853
2854         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2855                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2856                            aid);
2857         aid &= ~(BIT(15) | BIT(14));
2858
2859         ifmgd->broken_ap = false;
2860
2861         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2862                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2863                            aid);
2864                 aid = 0;
2865                 ifmgd->broken_ap = true;
2866         }
2867
2868         pos = mgmt->u.assoc_resp.variable;
2869         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2870
2871         if (!elems.supp_rates) {
2872                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2873                 return false;
2874         }
2875
2876         ifmgd->aid = aid;
2877         ifmgd->tdls_chan_switch_prohibited =
2878                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2879                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2880
2881         /*
2882          * Some APs are erroneously not including some information in their
2883          * (re)association response frames. Try to recover by using the data
2884          * from the beacon or probe response. This seems to afflict mobile
2885          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2886          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2887          */
2888         if ((assoc_data->wmm && !elems.wmm_param) ||
2889             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2890              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2891             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2892              (!elems.vht_cap_elem || !elems.vht_operation))) {
2893                 const struct cfg80211_bss_ies *ies;
2894                 struct ieee802_11_elems bss_elems;
2895
2896                 rcu_read_lock();
2897                 ies = rcu_dereference(cbss->ies);
2898                 if (ies)
2899                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2900                                           GFP_ATOMIC);
2901                 rcu_read_unlock();
2902                 if (!bss_ies)
2903                         return false;
2904
2905                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2906                                        false, &bss_elems);
2907                 if (assoc_data->wmm &&
2908                     !elems.wmm_param && bss_elems.wmm_param) {
2909                         elems.wmm_param = bss_elems.wmm_param;
2910                         sdata_info(sdata,
2911                                    "AP bug: WMM param missing from AssocResp\n");
2912                 }
2913
2914                 /*
2915                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2916                  * have to include the IEs in the (re)association response.
2917                  */
2918                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2919                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2920                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2921                         sdata_info(sdata,
2922                                    "AP bug: HT capability missing from AssocResp\n");
2923                 }
2924                 if (!elems.ht_operation && bss_elems.ht_operation &&
2925                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2926                         elems.ht_operation = bss_elems.ht_operation;
2927                         sdata_info(sdata,
2928                                    "AP bug: HT operation missing from AssocResp\n");
2929                 }
2930                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2931                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2932                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2933                         sdata_info(sdata,
2934                                    "AP bug: VHT capa missing from AssocResp\n");
2935                 }
2936                 if (!elems.vht_operation && bss_elems.vht_operation &&
2937                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2938                         elems.vht_operation = bss_elems.vht_operation;
2939                         sdata_info(sdata,
2940                                    "AP bug: VHT operation missing from AssocResp\n");
2941                 }
2942         }
2943
2944         /*
2945          * We previously checked these in the beacon/probe response, so
2946          * they should be present here. This is just a safety net.
2947          */
2948         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2949             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2950                 sdata_info(sdata,
2951                            "HT AP is missing WMM params or HT capability/operation\n");
2952                 ret = false;
2953                 goto out;
2954         }
2955
2956         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2957             (!elems.vht_cap_elem || !elems.vht_operation)) {
2958                 sdata_info(sdata,
2959                            "VHT AP is missing VHT capability/operation\n");
2960                 ret = false;
2961                 goto out;
2962         }
2963
2964         mutex_lock(&sdata->local->sta_mtx);
2965         /*
2966          * station info was already allocated and inserted before
2967          * the association and should be available to us
2968          */
2969         sta = sta_info_get(sdata, cbss->bssid);
2970         if (WARN_ON(!sta)) {
2971                 mutex_unlock(&sdata->local->sta_mtx);
2972                 ret = false;
2973                 goto out;
2974         }
2975
2976         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2977
2978         /* Set up internal HT/VHT capabilities */
2979         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2980                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2981                                                   elems.ht_cap_elem, sta);
2982
2983         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2984                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2985                                                     elems.vht_cap_elem, sta);
2986
2987         /*
2988          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2989          * in their association response, so ignore that data for our own
2990          * configuration. If it changed since the last beacon, we'll get the
2991          * next beacon and update then.
2992          */
2993
2994         /*
2995          * If an operating mode notification IE is present, override the
2996          * NSS calculation (that would be done in rate_control_rate_init())
2997          * and use the # of streams from that element.
2998          */
2999         if (elems.opmode_notif &&
3000             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3001                 u8 nss;
3002
3003                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3004                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3005                 nss += 1;
3006                 sta->sta.rx_nss = nss;
3007         }
3008
3009         rate_control_rate_init(sta);
3010
3011         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3012                 set_sta_flag(sta, WLAN_STA_MFP);
3013                 sta->sta.mfp = true;
3014         } else {
3015                 sta->sta.mfp = false;
3016         }
3017
3018         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3019
3020         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3021         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3022                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3023         if (err) {
3024                 sdata_info(sdata,
3025                            "failed to move station %pM to desired state\n",
3026                            sta->sta.addr);
3027                 WARN_ON(__sta_info_destroy(sta));
3028                 mutex_unlock(&sdata->local->sta_mtx);
3029                 ret = false;
3030                 goto out;
3031         }
3032
3033         mutex_unlock(&sdata->local->sta_mtx);
3034
3035         /*
3036          * Always handle WMM once after association regardless
3037          * of the first value the AP uses. Setting -1 here has
3038          * that effect because the AP values is an unsigned
3039          * 4-bit value.
3040          */
3041         ifmgd->wmm_last_param_set = -1;
3042
3043         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3044                 ieee80211_set_wmm_default(sdata, false, false);
3045         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3046                                              elems.wmm_param_len)) {
3047                 /* still enable QoS since we might have HT/VHT */
3048                 ieee80211_set_wmm_default(sdata, false, true);
3049                 /* set the disable-WMM flag in this case to disable
3050                  * tracking WMM parameter changes in the beacon if
3051                  * the parameters weren't actually valid. Doing so
3052                  * avoids changing parameters very strangely when
3053                  * the AP is going back and forth between valid and
3054                  * invalid parameters.
3055                  */
3056                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3057         }
3058         changed |= BSS_CHANGED_QOS;
3059
3060         /* set AID and assoc capability,
3061          * ieee80211_set_associated() will tell the driver */
3062         bss_conf->aid = aid;
3063         bss_conf->assoc_capability = capab_info;
3064         ieee80211_set_associated(sdata, cbss, changed);
3065
3066         /*
3067          * If we're using 4-addr mode, let the AP know that we're
3068          * doing so, so that it can create the STA VLAN on its side
3069          */
3070         if (ifmgd->use_4addr)
3071                 ieee80211_send_4addr_nullfunc(local, sdata);
3072
3073         /*
3074          * Start timer to probe the connection to the AP now.
3075          * Also start the timer that will detect beacon loss.
3076          */
3077         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3078         ieee80211_sta_reset_beacon_monitor(sdata);
3079
3080         ret = true;
3081  out:
3082         kfree(bss_ies);
3083         return ret;
3084 }
3085
3086 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3087                                          struct ieee80211_mgmt *mgmt,
3088                                          size_t len)
3089 {
3090         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3091         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3092         u16 capab_info, status_code, aid;
3093         struct ieee802_11_elems elems;
3094         int ac, uapsd_queues = -1;
3095         u8 *pos;
3096         bool reassoc;
3097         struct cfg80211_bss *bss;
3098         struct ieee80211_event event = {
3099                 .type = MLME_EVENT,
3100                 .u.mlme.data = ASSOC_EVENT,
3101         };
3102
3103         sdata_assert_lock(sdata);
3104
3105         if (!assoc_data)
3106                 return;
3107         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3108                 return;
3109
3110         /*
3111          * AssocResp and ReassocResp have identical structure, so process both
3112          * of them in this function.
3113          */
3114
3115         if (len < 24 + 6)
3116                 return;
3117
3118         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3119         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3120         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3121         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3122
3123         sdata_info(sdata,
3124                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3125                    reassoc ? "Rea" : "A", mgmt->sa,
3126                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3127
3128         pos = mgmt->u.assoc_resp.variable;
3129         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3130
3131         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3132             elems.timeout_int &&
3133             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3134                 u32 tu, ms;
3135                 tu = le32_to_cpu(elems.timeout_int->value);
3136                 ms = tu * 1024 / 1000;
3137                 sdata_info(sdata,
3138                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3139                            mgmt->sa, tu, ms);
3140                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3141                 assoc_data->timeout_started = true;
3142                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3143                         run_again(sdata, assoc_data->timeout);
3144                 return;
3145         }
3146
3147         bss = assoc_data->bss;
3148
3149         if (status_code != WLAN_STATUS_SUCCESS) {
3150                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3151                            mgmt->sa, status_code);
3152                 ieee80211_destroy_assoc_data(sdata, false);
3153                 event.u.mlme.status = MLME_DENIED;
3154                 event.u.mlme.reason = status_code;
3155                 drv_event_callback(sdata->local, sdata, &event);
3156         } else {
3157                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3158                         /* oops -- internal error -- send timeout for now */
3159                         ieee80211_destroy_assoc_data(sdata, false);
3160                         cfg80211_assoc_timeout(sdata->dev, bss);
3161                         return;
3162                 }
3163                 event.u.mlme.status = MLME_SUCCESS;
3164                 drv_event_callback(sdata->local, sdata, &event);
3165                 sdata_info(sdata, "associated\n");
3166
3167                 /*
3168                  * destroy assoc_data afterwards, as otherwise an idle
3169                  * recalc after assoc_data is NULL but before associated
3170                  * is set can cause the interface to go idle
3171                  */
3172                 ieee80211_destroy_assoc_data(sdata, true);
3173
3174                 /* get uapsd queues configuration */
3175                 uapsd_queues = 0;
3176                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3177                         if (sdata->tx_conf[ac].uapsd)
3178                                 uapsd_queues |= BIT(ac);
3179         }
3180
3181         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3182 }
3183
3184 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3185                                   struct ieee80211_mgmt *mgmt, size_t len,
3186                                   struct ieee80211_rx_status *rx_status,
3187                                   struct ieee802_11_elems *elems)
3188 {
3189         struct ieee80211_local *local = sdata->local;
3190         struct ieee80211_bss *bss;
3191         struct ieee80211_channel *channel;
3192
3193         sdata_assert_lock(sdata);
3194
3195         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3196         if (!channel)
3197                 return;
3198
3199         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3200                                         channel);
3201         if (bss) {
3202                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3203                 ieee80211_rx_bss_put(local, bss);
3204         }
3205 }
3206
3207
3208 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3209                                          struct sk_buff *skb)
3210 {
3211         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3212         struct ieee80211_if_managed *ifmgd;
3213         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3214         size_t baselen, len = skb->len;
3215         struct ieee802_11_elems elems;
3216
3217         ifmgd = &sdata->u.mgd;
3218
3219         sdata_assert_lock(sdata);
3220
3221         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3222                 return; /* ignore ProbeResp to foreign address */
3223
3224         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3225         if (baselen > len)
3226                 return;
3227
3228         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3229                                false, &elems);
3230
3231         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3232
3233         if (ifmgd->associated &&
3234             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3235                 ieee80211_reset_ap_probe(sdata);
3236 }
3237
3238 /*
3239  * This is the canonical list of information elements we care about,
3240  * the filter code also gives us all changes to the Microsoft OUI
3241  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3242  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3243  * changes to requested client power.
3244  *
3245  * We implement beacon filtering in software since that means we can
3246  * avoid processing the frame here and in cfg80211, and userspace
3247  * will not be able to tell whether the hardware supports it or not.
3248  *
3249  * XXX: This list needs to be dynamic -- userspace needs to be able to
3250  *      add items it requires. It also needs to be able to tell us to
3251  *      look out for other vendor IEs.
3252  */
3253 static const u64 care_about_ies =
3254         (1ULL << WLAN_EID_COUNTRY) |
3255         (1ULL << WLAN_EID_ERP_INFO) |
3256         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3257         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3258         (1ULL << WLAN_EID_HT_CAPABILITY) |
3259         (1ULL << WLAN_EID_HT_OPERATION) |
3260         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3261
3262 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3263                                      struct ieee80211_mgmt *mgmt, size_t len,
3264                                      struct ieee80211_rx_status *rx_status)
3265 {
3266         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3267         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3268         size_t baselen;
3269         struct ieee802_11_elems elems;
3270         struct ieee80211_local *local = sdata->local;
3271         struct ieee80211_chanctx_conf *chanctx_conf;
3272         struct ieee80211_channel *chan;
3273         struct sta_info *sta;
3274         u32 changed = 0;
3275         bool erp_valid;
3276         u8 erp_value = 0;
3277         u32 ncrc;
3278         u8 *bssid;
3279         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3280
3281         sdata_assert_lock(sdata);
3282
3283         /* Process beacon from the current BSS */
3284         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3285         if (baselen > len)
3286                 return;
3287
3288         rcu_read_lock();
3289         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3290         if (!chanctx_conf) {
3291                 rcu_read_unlock();
3292                 return;
3293         }
3294
3295         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3296                 rcu_read_unlock();
3297                 return;
3298         }
3299         chan = chanctx_conf->def.chan;
3300         rcu_read_unlock();
3301
3302         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3303             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3304                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3305                                        len - baselen, false, &elems);
3306
3307                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3308                 if (elems.tim && !elems.parse_error) {
3309                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3310                         ifmgd->dtim_period = tim_ie->dtim_period;
3311                 }
3312                 ifmgd->have_beacon = true;
3313                 ifmgd->assoc_data->need_beacon = false;
3314                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3315                         sdata->vif.bss_conf.sync_tsf =
3316                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3317                         sdata->vif.bss_conf.sync_device_ts =
3318                                 rx_status->device_timestamp;
3319                         if (elems.tim)
3320                                 sdata->vif.bss_conf.sync_dtim_count =
3321                                         elems.tim->dtim_count;
3322                         else
3323                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3324                 }
3325                 /* continue assoc process */
3326                 ifmgd->assoc_data->timeout = jiffies;
3327                 ifmgd->assoc_data->timeout_started = true;
3328                 run_again(sdata, ifmgd->assoc_data->timeout);
3329                 return;
3330         }
3331
3332         if (!ifmgd->associated ||
3333             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3334                 return;
3335         bssid = ifmgd->associated->bssid;
3336
3337         /* Track average RSSI from the Beacon frames of the current AP */
3338         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3339                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3340                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3341                 ifmgd->last_cqm_event_signal = 0;
3342                 ifmgd->count_beacon_signal = 1;
3343                 ifmgd->last_ave_beacon_signal = 0;
3344         } else {
3345                 ifmgd->count_beacon_signal++;
3346         }
3347
3348         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3349
3350         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3351             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3352                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3353                 int last_sig = ifmgd->last_ave_beacon_signal;
3354                 struct ieee80211_event event = {
3355                         .type = RSSI_EVENT,
3356                 };
3357
3358                 /*
3359                  * if signal crosses either of the boundaries, invoke callback
3360                  * with appropriate parameters
3361                  */
3362                 if (sig > ifmgd->rssi_max_thold &&
3363                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3364                         ifmgd->last_ave_beacon_signal = sig;
3365                         event.u.rssi.data = RSSI_EVENT_HIGH;
3366                         drv_event_callback(local, sdata, &event);
3367                 } else if (sig < ifmgd->rssi_min_thold &&
3368                            (last_sig >= ifmgd->rssi_max_thold ||
3369                            last_sig == 0)) {
3370                         ifmgd->last_ave_beacon_signal = sig;
3371                         event.u.rssi.data = RSSI_EVENT_LOW;
3372                         drv_event_callback(local, sdata, &event);
3373                 }
3374         }
3375
3376         if (bss_conf->cqm_rssi_thold &&
3377             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3378             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3379                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3380                 int last_event = ifmgd->last_cqm_event_signal;
3381                 int thold = bss_conf->cqm_rssi_thold;
3382                 int hyst = bss_conf->cqm_rssi_hyst;
3383
3384                 if (sig < thold &&
3385                     (last_event == 0 || sig < last_event - hyst)) {
3386                         ifmgd->last_cqm_event_signal = sig;
3387                         ieee80211_cqm_rssi_notify(
3388                                 &sdata->vif,
3389                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3390                                 GFP_KERNEL);
3391                 } else if (sig > thold &&
3392                            (last_event == 0 || sig > last_event + hyst)) {
3393                         ifmgd->last_cqm_event_signal = sig;
3394                         ieee80211_cqm_rssi_notify(
3395                                 &sdata->vif,
3396                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3397                                 GFP_KERNEL);
3398                 }
3399         }
3400
3401         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3402                 mlme_dbg_ratelimited(sdata,
3403                                      "cancelling AP probe due to a received beacon\n");
3404                 ieee80211_reset_ap_probe(sdata);
3405         }
3406
3407         /*
3408          * Push the beacon loss detection into the future since
3409          * we are processing a beacon from the AP just now.
3410          */
3411         ieee80211_sta_reset_beacon_monitor(sdata);
3412
3413         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3414         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3415                                           len - baselen, false, &elems,
3416                                           care_about_ies, ncrc);
3417
3418         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3419             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3420                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3421                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3422                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3423                                 ieee80211_hw_config(local,
3424                                                     IEEE80211_CONF_CHANGE_PS);
3425                         }
3426                         ieee80211_send_nullfunc(local, sdata, false);
3427                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3428                         local->pspolling = true;
3429
3430                         /*
3431                          * Here is assumed that the driver will be
3432                          * able to send ps-poll frame and receive a
3433                          * response even though power save mode is
3434                          * enabled, but some drivers might require
3435                          * to disable power save here. This needs
3436                          * to be investigated.
3437                          */
3438                         ieee80211_send_pspoll(local, sdata);
3439                 }
3440         }
3441
3442         if (sdata->vif.p2p ||
3443             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3444                 struct ieee80211_p2p_noa_attr noa = {};
3445                 int ret;
3446
3447                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3448                                             len - baselen,
3449                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3450                                             (u8 *) &noa, sizeof(noa));
3451                 if (ret >= 2) {
3452                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3453                                 /* valid noa_attr and index changed */
3454                                 sdata->u.mgd.p2p_noa_index = noa.index;
3455                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3456                                 changed |= BSS_CHANGED_P2P_PS;
3457                                 /*
3458                                  * make sure we update all information, the CRC
3459                                  * mechanism doesn't look at P2P attributes.
3460                                  */
3461                                 ifmgd->beacon_crc_valid = false;
3462                         }
3463                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3464                         /* noa_attr not found and we had valid noa_attr before */
3465                         sdata->u.mgd.p2p_noa_index = -1;
3466                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3467                         changed |= BSS_CHANGED_P2P_PS;
3468                         ifmgd->beacon_crc_valid = false;
3469                 }
3470         }
3471
3472         if (ifmgd->csa_waiting_bcn)
3473                 ieee80211_chswitch_post_beacon(sdata);
3474
3475         /*
3476          * Update beacon timing and dtim count on every beacon appearance. This
3477          * will allow the driver to use the most updated values. Do it before
3478          * comparing this one with last received beacon.
3479          * IMPORTANT: These parameters would possibly be out of sync by the time
3480          * the driver will use them. The synchronized view is currently
3481          * guaranteed only in certain callbacks.
3482          */
3483         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3484                 sdata->vif.bss_conf.sync_tsf =
3485                         le64_to_cpu(mgmt->u.beacon.timestamp);
3486                 sdata->vif.bss_conf.sync_device_ts =
3487                         rx_status->device_timestamp;
3488                 if (elems.tim)
3489                         sdata->vif.bss_conf.sync_dtim_count =
3490                                 elems.tim->dtim_count;
3491                 else
3492                         sdata->vif.bss_conf.sync_dtim_count = 0;
3493         }
3494
3495         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3496                 return;
3497         ifmgd->beacon_crc = ncrc;
3498         ifmgd->beacon_crc_valid = true;
3499
3500         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3501
3502         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3503                                          rx_status->device_timestamp,
3504                                          &elems, true);
3505
3506         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3507             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3508                                      elems.wmm_param_len))
3509                 changed |= BSS_CHANGED_QOS;
3510
3511         /*
3512          * If we haven't had a beacon before, tell the driver about the
3513          * DTIM period (and beacon timing if desired) now.
3514          */
3515         if (!ifmgd->have_beacon) {
3516                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3517                 if (elems.tim)
3518                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3519                 else
3520                         bss_conf->dtim_period = 1;
3521
3522                 changed |= BSS_CHANGED_BEACON_INFO;
3523                 ifmgd->have_beacon = true;
3524
3525                 mutex_lock(&local->iflist_mtx);
3526                 ieee80211_recalc_ps(local);
3527                 mutex_unlock(&local->iflist_mtx);
3528
3529                 ieee80211_recalc_ps_vif(sdata);
3530         }
3531
3532         if (elems.erp_info) {
3533                 erp_valid = true;
3534                 erp_value = elems.erp_info[0];
3535         } else {
3536                 erp_valid = false;
3537         }
3538         changed |= ieee80211_handle_bss_capability(sdata,
3539                         le16_to_cpu(mgmt->u.beacon.capab_info),
3540                         erp_valid, erp_value);
3541
3542         mutex_lock(&local->sta_mtx);
3543         sta = sta_info_get(sdata, bssid);
3544
3545         if (ieee80211_config_bw(sdata, sta,
3546                                 elems.ht_cap_elem, elems.ht_operation,
3547                                 elems.vht_operation, bssid, &changed)) {
3548                 mutex_unlock(&local->sta_mtx);
3549                 sdata_info(sdata,
3550                            "failed to follow AP %pM bandwidth change, disconnect\n",
3551                            bssid);
3552                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3553                                        WLAN_REASON_DEAUTH_LEAVING,
3554                                        true, deauth_buf);
3555                 ieee80211_report_disconnect(sdata, deauth_buf,
3556                                             sizeof(deauth_buf), true,
3557                                             WLAN_REASON_DEAUTH_LEAVING);
3558                 return;
3559         }
3560
3561         if (sta && elems.opmode_notif)
3562                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3563                                             rx_status->band);
3564         mutex_unlock(&local->sta_mtx);
3565
3566         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3567                                                elems.country_elem,
3568                                                elems.country_elem_len,
3569                                                elems.pwr_constr_elem,
3570                                                elems.cisco_dtpc_elem);
3571
3572         ieee80211_bss_info_change_notify(sdata, changed);
3573 }
3574
3575 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3576                                   struct sk_buff *skb)
3577 {
3578         struct ieee80211_rx_status *rx_status;
3579         struct ieee80211_mgmt *mgmt;
3580         u16 fc;
3581         struct ieee802_11_elems elems;
3582         int ies_len;
3583
3584         rx_status = (struct ieee80211_rx_status *) skb->cb;
3585         mgmt = (struct ieee80211_mgmt *) skb->data;
3586         fc = le16_to_cpu(mgmt->frame_control);
3587
3588         sdata_lock(sdata);
3589
3590         switch (fc & IEEE80211_FCTL_STYPE) {
3591         case IEEE80211_STYPE_BEACON:
3592                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3593                 break;
3594         case IEEE80211_STYPE_PROBE_RESP:
3595                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3596                 break;
3597         case IEEE80211_STYPE_AUTH:
3598                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3599                 break;
3600         case IEEE80211_STYPE_DEAUTH:
3601                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3602                 break;
3603         case IEEE80211_STYPE_DISASSOC:
3604                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3605                 break;
3606         case IEEE80211_STYPE_ASSOC_RESP:
3607         case IEEE80211_STYPE_REASSOC_RESP:
3608                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3609                 break;
3610         case IEEE80211_STYPE_ACTION:
3611                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3612                         ies_len = skb->len -
3613                                   offsetof(struct ieee80211_mgmt,
3614                                            u.action.u.chan_switch.variable);
3615
3616                         if (ies_len < 0)
3617                                 break;
3618
3619                         ieee802_11_parse_elems(
3620                                 mgmt->u.action.u.chan_switch.variable,
3621                                 ies_len, true, &elems);
3622
3623                         if (elems.parse_error)
3624                                 break;
3625
3626                         ieee80211_sta_process_chanswitch(sdata,
3627                                                  rx_status->mactime,
3628                                                  rx_status->device_timestamp,
3629                                                  &elems, false);
3630                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3631                         ies_len = skb->len -
3632                                   offsetof(struct ieee80211_mgmt,
3633                                            u.action.u.ext_chan_switch.variable);
3634
3635                         if (ies_len < 0)
3636                                 break;
3637
3638                         ieee802_11_parse_elems(
3639                                 mgmt->u.action.u.ext_chan_switch.variable,
3640                                 ies_len, true, &elems);
3641
3642                         if (elems.parse_error)
3643                                 break;
3644
3645                         /* for the handling code pretend this was also an IE */
3646                         elems.ext_chansw_ie =
3647                                 &mgmt->u.action.u.ext_chan_switch.data;
3648
3649                         ieee80211_sta_process_chanswitch(sdata,
3650                                                  rx_status->mactime,
3651                                                  rx_status->device_timestamp,
3652                                                  &elems, false);
3653                 }
3654                 break;
3655         }
3656         sdata_unlock(sdata);
3657 }
3658
3659 static void ieee80211_sta_timer(unsigned long data)
3660 {
3661         struct ieee80211_sub_if_data *sdata =
3662                 (struct ieee80211_sub_if_data *) data;
3663
3664         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3665 }
3666
3667 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3668                                           u8 *bssid, u8 reason, bool tx)
3669 {
3670         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3671
3672         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3673                                tx, frame_buf);
3674
3675         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3676                                     reason);
3677 }
3678
3679 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3680 {
3681         struct ieee80211_local *local = sdata->local;
3682         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3683         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3684         u32 tx_flags = 0;
3685         u16 trans = 1;
3686         u16 status = 0;
3687
3688         sdata_assert_lock(sdata);
3689
3690         if (WARN_ON_ONCE(!auth_data))
3691                 return -EINVAL;
3692
3693         auth_data->tries++;
3694
3695         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3696                 sdata_info(sdata, "authentication with %pM timed out\n",
3697                            auth_data->bss->bssid);
3698
3699                 /*
3700                  * Most likely AP is not in the range so remove the
3701                  * bss struct for that AP.
3702                  */
3703                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3704
3705                 return -ETIMEDOUT;
3706         }
3707
3708         drv_mgd_prepare_tx(local, sdata);
3709
3710         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3711                    auth_data->bss->bssid, auth_data->tries,
3712                    IEEE80211_AUTH_MAX_TRIES);
3713
3714         auth_data->expected_transaction = 2;
3715
3716         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3717                 trans = auth_data->sae_trans;
3718                 status = auth_data->sae_status;
3719                 auth_data->expected_transaction = trans;
3720         }
3721
3722         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3723                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3724                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3725
3726         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3727                             auth_data->data, auth_data->data_len,
3728                             auth_data->bss->bssid,
3729                             auth_data->bss->bssid, NULL, 0, 0,
3730                             tx_flags);
3731
3732         if (tx_flags == 0) {
3733                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3734                 auth_data->timeout_started = true;
3735                 run_again(sdata, auth_data->timeout);
3736         } else {
3737                 auth_data->timeout =
3738                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3739                 auth_data->timeout_started = true;
3740                 run_again(sdata, auth_data->timeout);
3741         }
3742
3743         return 0;
3744 }
3745
3746 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3747 {
3748         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3749         struct ieee80211_local *local = sdata->local;
3750
3751         sdata_assert_lock(sdata);
3752
3753         assoc_data->tries++;
3754         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3755                 sdata_info(sdata, "association with %pM timed out\n",
3756                            assoc_data->bss->bssid);
3757
3758                 /*
3759                  * Most likely AP is not in the range so remove the
3760                  * bss struct for that AP.
3761                  */
3762                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3763
3764                 return -ETIMEDOUT;
3765         }
3766
3767         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3768                    assoc_data->bss->bssid, assoc_data->tries,
3769                    IEEE80211_ASSOC_MAX_TRIES);
3770         ieee80211_send_assoc(sdata);
3771
3772         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3773                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3774                 assoc_data->timeout_started = true;
3775                 run_again(sdata, assoc_data->timeout);
3776         } else {
3777                 assoc_data->timeout =
3778                         round_jiffies_up(jiffies +
3779                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3780                 assoc_data->timeout_started = true;
3781                 run_again(sdata, assoc_data->timeout);
3782         }
3783
3784         return 0;
3785 }
3786
3787 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3788                                   __le16 fc, bool acked)
3789 {
3790         struct ieee80211_local *local = sdata->local;
3791
3792         sdata->u.mgd.status_fc = fc;
3793         sdata->u.mgd.status_acked = acked;
3794         sdata->u.mgd.status_received = true;
3795
3796         ieee80211_queue_work(&local->hw, &sdata->work);
3797 }
3798
3799 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3800 {
3801         struct ieee80211_local *local = sdata->local;
3802         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3803
3804         sdata_lock(sdata);
3805
3806         if (ifmgd->status_received) {
3807                 __le16 fc = ifmgd->status_fc;
3808                 bool status_acked = ifmgd->status_acked;
3809
3810                 ifmgd->status_received = false;
3811                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3812                         if (status_acked) {
3813                                 ifmgd->auth_data->timeout =
3814                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3815                                 run_again(sdata, ifmgd->auth_data->timeout);
3816                         } else {
3817                                 ifmgd->auth_data->timeout = jiffies - 1;
3818                         }
3819                         ifmgd->auth_data->timeout_started = true;
3820                 } else if (ifmgd->assoc_data &&
3821                            (ieee80211_is_assoc_req(fc) ||
3822                             ieee80211_is_reassoc_req(fc))) {
3823                         if (status_acked) {
3824                                 ifmgd->assoc_data->timeout =
3825                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3826                                 run_again(sdata, ifmgd->assoc_data->timeout);
3827                         } else {
3828                                 ifmgd->assoc_data->timeout = jiffies - 1;
3829                         }
3830                         ifmgd->assoc_data->timeout_started = true;
3831                 }
3832         }
3833
3834         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3835             time_after(jiffies, ifmgd->auth_data->timeout)) {
3836                 if (ifmgd->auth_data->done) {
3837                         /*
3838                          * ok ... we waited for assoc but userspace didn't,
3839                          * so let's just kill the auth data
3840                          */
3841                         ieee80211_destroy_auth_data(sdata, false);
3842                 } else if (ieee80211_auth(sdata)) {
3843                         u8 bssid[ETH_ALEN];
3844                         struct ieee80211_event event = {
3845                                 .type = MLME_EVENT,
3846                                 .u.mlme.data = AUTH_EVENT,
3847                                 .u.mlme.status = MLME_TIMEOUT,
3848                         };
3849
3850                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3851
3852                         ieee80211_destroy_auth_data(sdata, false);
3853
3854                         cfg80211_auth_timeout(sdata->dev, bssid);
3855                         drv_event_callback(sdata->local, sdata, &event);
3856                 }
3857         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3858                 run_again(sdata, ifmgd->auth_data->timeout);
3859
3860         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3861             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3862                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3863                     ieee80211_do_assoc(sdata)) {
3864                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3865                         struct ieee80211_event event = {
3866                                 .type = MLME_EVENT,
3867                                 .u.mlme.data = ASSOC_EVENT,
3868                                 .u.mlme.status = MLME_TIMEOUT,
3869                         };
3870
3871                         ieee80211_destroy_assoc_data(sdata, false);
3872                         cfg80211_assoc_timeout(sdata->dev, bss);
3873                         drv_event_callback(sdata->local, sdata, &event);
3874                 }
3875         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3876                 run_again(sdata, ifmgd->assoc_data->timeout);
3877
3878         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3879             ifmgd->associated) {
3880                 u8 bssid[ETH_ALEN];
3881                 int max_tries;
3882
3883                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3884
3885                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3886                         max_tries = max_nullfunc_tries;
3887                 else
3888                         max_tries = max_probe_tries;
3889
3890                 /* ACK received for nullfunc probing frame */
3891                 if (!ifmgd->probe_send_count)
3892                         ieee80211_reset_ap_probe(sdata);
3893                 else if (ifmgd->nullfunc_failed) {
3894                         if (ifmgd->probe_send_count < max_tries) {
3895                                 mlme_dbg(sdata,
3896                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3897                                          bssid, ifmgd->probe_send_count,
3898                                          max_tries);
3899                                 ieee80211_mgd_probe_ap_send(sdata);
3900                         } else {
3901                                 mlme_dbg(sdata,
3902                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3903                                          bssid);
3904                                 ieee80211_sta_connection_lost(sdata, bssid,
3905                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3906                                         false);
3907                         }
3908                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3909                         run_again(sdata, ifmgd->probe_timeout);
3910                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3911                         mlme_dbg(sdata,
3912                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3913                                  bssid, probe_wait_ms);
3914                         ieee80211_sta_connection_lost(sdata, bssid,
3915                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3916                 } else if (ifmgd->probe_send_count < max_tries) {
3917                         mlme_dbg(sdata,
3918                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3919                                  bssid, probe_wait_ms,
3920                                  ifmgd->probe_send_count, max_tries);
3921                         ieee80211_mgd_probe_ap_send(sdata);
3922                 } else {
3923                         /*
3924                          * We actually lost the connection ... or did we?
3925                          * Let's make sure!
3926                          */
3927                         mlme_dbg(sdata,
3928                                  "No probe response from AP %pM after %dms, disconnecting.\n",
3929                                  bssid, probe_wait_ms);
3930
3931                         ieee80211_sta_connection_lost(sdata, bssid,
3932                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3933                 }
3934         }
3935
3936         sdata_unlock(sdata);
3937 }
3938
3939 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3940 {
3941         struct ieee80211_sub_if_data *sdata =
3942                 (struct ieee80211_sub_if_data *) data;
3943         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3944
3945         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3946                 return;
3947
3948         sdata->u.mgd.connection_loss = false;
3949         ieee80211_queue_work(&sdata->local->hw,
3950                              &sdata->u.mgd.beacon_connection_loss_work);
3951 }
3952
3953 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3954 {
3955         struct ieee80211_sub_if_data *sdata =
3956                 (struct ieee80211_sub_if_data *) data;
3957         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3958         struct ieee80211_local *local = sdata->local;
3959
3960         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3961                 return;
3962
3963         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3964 }
3965
3966 static void ieee80211_sta_monitor_work(struct work_struct *work)
3967 {
3968         struct ieee80211_sub_if_data *sdata =
3969                 container_of(work, struct ieee80211_sub_if_data,
3970                              u.mgd.monitor_work);
3971
3972         ieee80211_mgd_probe_ap(sdata, false);
3973 }
3974
3975 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3976 {
3977         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3978                 __ieee80211_stop_poll(sdata);
3979
3980                 /* let's probe the connection once */
3981                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3982                         ieee80211_queue_work(&sdata->local->hw,
3983                                              &sdata->u.mgd.monitor_work);
3984         }
3985 }
3986
3987 #ifdef CONFIG_PM
3988 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3989 {
3990         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3991         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3992
3993         sdata_lock(sdata);
3994
3995         if (ifmgd->auth_data || ifmgd->assoc_data) {
3996                 const u8 *bssid = ifmgd->auth_data ?
3997                                 ifmgd->auth_data->bss->bssid :
3998                                 ifmgd->assoc_data->bss->bssid;
3999
4000                 /*
4001                  * If we are trying to authenticate / associate while suspending,
4002                  * cfg80211 won't know and won't actually abort those attempts,
4003                  * thus we need to do that ourselves.
4004                  */
4005                 ieee80211_send_deauth_disassoc(sdata, bssid,
4006                                                IEEE80211_STYPE_DEAUTH,
4007                                                WLAN_REASON_DEAUTH_LEAVING,
4008                                                false, frame_buf);
4009                 if (ifmgd->assoc_data)
4010                         ieee80211_destroy_assoc_data(sdata, false);
4011                 if (ifmgd->auth_data)
4012                         ieee80211_destroy_auth_data(sdata, false);
4013                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4014                                       IEEE80211_DEAUTH_FRAME_LEN);
4015         }
4016
4017         /* This is a bit of a hack - we should find a better and more generic
4018          * solution to this. Normally when suspending, cfg80211 will in fact
4019          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4020          * auth (not so important) or assoc (this is the problem) process.
4021          *
4022          * As a consequence, it can happen that we are in the process of both
4023          * associating and suspending, and receive an association response
4024          * after cfg80211 has checked if it needs to disconnect, but before
4025          * we actually set the flag to drop incoming frames. This will then
4026          * cause the workqueue flush to process the association response in
4027          * the suspend, resulting in a successful association just before it
4028          * tries to remove the interface from the driver, which now though
4029          * has a channel context assigned ... this results in issues.
4030          *
4031          * To work around this (for now) simply deauth here again if we're
4032          * now connected.
4033          */
4034         if (ifmgd->associated && !sdata->local->wowlan) {
4035                 u8 bssid[ETH_ALEN];
4036                 struct cfg80211_deauth_request req = {
4037                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4038                         .bssid = bssid,
4039                 };
4040
4041                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4042                 ieee80211_mgd_deauth(sdata, &req);
4043         }
4044
4045         sdata_unlock(sdata);
4046 }
4047
4048 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4049 {
4050         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4051
4052         sdata_lock(sdata);
4053         if (!ifmgd->associated) {
4054                 sdata_unlock(sdata);
4055                 return;
4056         }
4057
4058         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4059                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4060                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4061                 ieee80211_sta_connection_lost(sdata,
4062                                               ifmgd->associated->bssid,
4063                                               WLAN_REASON_UNSPECIFIED,
4064                                               true);
4065                 sdata_unlock(sdata);
4066                 return;
4067         }
4068         sdata_unlock(sdata);
4069 }
4070 #endif
4071
4072 /* interface setup */
4073 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4074 {
4075         struct ieee80211_if_managed *ifmgd;
4076
4077         ifmgd = &sdata->u.mgd;
4078         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4079         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4080         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4081                   ieee80211_beacon_connection_loss_work);
4082         INIT_WORK(&ifmgd->csa_connection_drop_work,
4083                   ieee80211_csa_connection_drop_work);
4084         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4085         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4086                           ieee80211_tdls_peer_del_work);
4087         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4088                     (unsigned long) sdata);
4089         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4090                     (unsigned long) sdata);
4091         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4092                     (unsigned long) sdata);
4093         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4094                     (unsigned long) sdata);
4095         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4096                           ieee80211_sta_handle_tspec_ac_params_wk);
4097
4098         ifmgd->flags = 0;
4099         ifmgd->powersave = sdata->wdev.ps;
4100         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4101         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4102         ifmgd->p2p_noa_index = -1;
4103
4104         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4105                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4106         else
4107                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4108
4109         /* Setup TDLS data */
4110         spin_lock_init(&ifmgd->teardown_lock);
4111         ifmgd->teardown_skb = NULL;
4112         ifmgd->orig_teardown_skb = NULL;
4113 }
4114
4115 /* scan finished notification */
4116 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4117 {
4118         struct ieee80211_sub_if_data *sdata;
4119
4120         /* Restart STA timers */
4121         rcu_read_lock();
4122         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4123                 if (ieee80211_sdata_running(sdata))
4124                         ieee80211_restart_sta_timer(sdata);
4125         }
4126         rcu_read_unlock();
4127 }
4128
4129 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4130                                      struct cfg80211_bss *cbss)
4131 {
4132         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4133         const u8 *ht_cap_ie, *vht_cap_ie;
4134         const struct ieee80211_ht_cap *ht_cap;
4135         const struct ieee80211_vht_cap *vht_cap;
4136         u8 chains = 1;
4137
4138         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4139                 return chains;
4140
4141         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4142         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4143                 ht_cap = (void *)(ht_cap_ie + 2);
4144                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4145                 /*
4146                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4147                  *       "Tx Unequal Modulation Supported" fields.
4148                  */
4149         }
4150
4151         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4152                 return chains;
4153
4154         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4155         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4156                 u8 nss;
4157                 u16 tx_mcs_map;
4158
4159                 vht_cap = (void *)(vht_cap_ie + 2);
4160                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4161                 for (nss = 8; nss > 0; nss--) {
4162                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4163                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4164                                 break;
4165                 }
4166                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4167                 chains = max(chains, nss);
4168         }
4169
4170         return chains;
4171 }
4172
4173 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4174                                   struct cfg80211_bss *cbss)
4175 {
4176         struct ieee80211_local *local = sdata->local;
4177         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4178         const struct ieee80211_ht_cap *ht_cap = NULL;
4179         const struct ieee80211_ht_operation *ht_oper = NULL;
4180         const struct ieee80211_vht_operation *vht_oper = NULL;
4181         struct ieee80211_supported_band *sband;
4182         struct cfg80211_chan_def chandef;
4183         int ret;
4184         u32 i;
4185         bool have_80mhz;
4186
4187         sband = local->hw.wiphy->bands[cbss->channel->band];
4188
4189         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4190                           IEEE80211_STA_DISABLE_80P80MHZ |
4191                           IEEE80211_STA_DISABLE_160MHZ);
4192
4193         rcu_read_lock();
4194
4195         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4196             sband->ht_cap.ht_supported) {
4197                 const u8 *ht_oper_ie, *ht_cap_ie;
4198
4199                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4200                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4201                         ht_oper = (void *)(ht_oper_ie + 2);
4202
4203                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4204                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4205                         ht_cap = (void *)(ht_cap_ie + 2);
4206
4207                 if (!ht_cap) {
4208                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4209                         ht_oper = NULL;
4210                 }
4211         }
4212
4213         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4214             sband->vht_cap.vht_supported) {
4215                 const u8 *vht_oper_ie, *vht_cap;
4216
4217                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4218                                                    WLAN_EID_VHT_OPERATION);
4219                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4220                         vht_oper = (void *)(vht_oper_ie + 2);
4221                 if (vht_oper && !ht_oper) {
4222                         vht_oper = NULL;
4223                         sdata_info(sdata,
4224                                    "AP advertised VHT without HT, disabling both\n");
4225                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4226                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4227                 }
4228
4229                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4230                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4231                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4232                         vht_oper = NULL;
4233                 }
4234         }
4235
4236         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4237         have_80mhz = false;
4238         for (i = 0; i < sband->n_channels; i++) {
4239                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4240                                                 IEEE80211_CHAN_NO_80MHZ))
4241                         continue;
4242
4243                 have_80mhz = true;
4244                 break;
4245         }
4246
4247         if (!have_80mhz)
4248                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4249
4250         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4251                                                      cbss->channel,
4252                                                      ht_cap, ht_oper, vht_oper,
4253                                                      &chandef, false);
4254
4255         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4256                                       local->rx_chains);
4257
4258         rcu_read_unlock();
4259
4260         /* will change later if needed */
4261         sdata->smps_mode = IEEE80211_SMPS_OFF;
4262
4263         mutex_lock(&local->mtx);
4264         /*
4265          * If this fails (possibly due to channel context sharing
4266          * on incompatible channels, e.g. 80+80 and 160 sharing the
4267          * same control channel) try to use a smaller bandwidth.
4268          */
4269         ret = ieee80211_vif_use_channel(sdata, &chandef,
4270                                         IEEE80211_CHANCTX_SHARED);
4271
4272         /* don't downgrade for 5 and 10 MHz channels, though. */
4273         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4274             chandef.width == NL80211_CHAN_WIDTH_10)
4275                 goto out;
4276
4277         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4278                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4279                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4280                                                 IEEE80211_CHANCTX_SHARED);
4281         }
4282  out:
4283         mutex_unlock(&local->mtx);
4284         return ret;
4285 }
4286
4287 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4288                                      struct cfg80211_bss *cbss, bool assoc,
4289                                      bool override)
4290 {
4291         struct ieee80211_local *local = sdata->local;
4292         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4293         struct ieee80211_bss *bss = (void *)cbss->priv;
4294         struct sta_info *new_sta = NULL;
4295         struct ieee80211_supported_band *sband;
4296         bool have_sta = false;
4297         int err;
4298
4299         sband = local->hw.wiphy->bands[cbss->channel->band];
4300
4301         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4302                 return -EINVAL;
4303
4304         if (assoc) {
4305                 rcu_read_lock();
4306                 have_sta = sta_info_get(sdata, cbss->bssid);
4307                 rcu_read_unlock();
4308         }
4309
4310         if (!have_sta) {
4311                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4312                 if (!new_sta)
4313                         return -ENOMEM;
4314         }
4315
4316         if (new_sta || override) {
4317                 err = ieee80211_prep_channel(sdata, cbss);
4318                 if (err) {
4319                         if (new_sta)
4320                                 sta_info_free(local, new_sta);
4321                         return -EINVAL;
4322                 }
4323         }
4324
4325         if (new_sta) {
4326                 u32 rates = 0, basic_rates = 0;
4327                 bool have_higher_than_11mbit;
4328                 int min_rate = INT_MAX, min_rate_index = -1;
4329                 struct ieee80211_chanctx_conf *chanctx_conf;
4330                 const struct cfg80211_bss_ies *ies;
4331                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4332                 u32 rate_flags;
4333
4334                 rcu_read_lock();
4335                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4336                 if (WARN_ON(!chanctx_conf)) {
4337                         rcu_read_unlock();
4338                         sta_info_free(local, new_sta);
4339                         return -EINVAL;
4340                 }
4341                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4342                 rcu_read_unlock();
4343
4344                 ieee80211_get_rates(sband, bss->supp_rates,
4345                                     bss->supp_rates_len,
4346                                     &rates, &basic_rates,
4347                                     &have_higher_than_11mbit,
4348                                     &min_rate, &min_rate_index,
4349                                     shift, rate_flags);
4350
4351                 /*
4352                  * This used to be a workaround for basic rates missing
4353                  * in the association response frame. Now that we no
4354                  * longer use the basic rates from there, it probably
4355                  * doesn't happen any more, but keep the workaround so
4356                  * in case some *other* APs are buggy in different ways
4357                  * we can connect -- with a warning.
4358                  */
4359                 if (!basic_rates && min_rate_index >= 0) {
4360                         sdata_info(sdata,
4361                                    "No basic rates, using min rate instead\n");
4362                         basic_rates = BIT(min_rate_index);
4363                 }
4364
4365                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4366                 sdata->vif.bss_conf.basic_rates = basic_rates;
4367
4368                 /* cf. IEEE 802.11 9.2.12 */
4369                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4370                     have_higher_than_11mbit)
4371                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4372                 else
4373                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4374
4375                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4376
4377                 /* set timing information */
4378                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4379                 rcu_read_lock();
4380                 ies = rcu_dereference(cbss->beacon_ies);
4381                 if (ies) {
4382                         const u8 *tim_ie;
4383
4384                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4385                         sdata->vif.bss_conf.sync_device_ts =
4386                                 bss->device_ts_beacon;
4387                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4388                                                   ies->data, ies->len);
4389                         if (tim_ie && tim_ie[1] >= 2)
4390                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4391                         else
4392                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4393                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4394                                                TIMING_BEACON_ONLY)) {
4395                         ies = rcu_dereference(cbss->proberesp_ies);
4396                         /* must be non-NULL since beacon IEs were NULL */
4397                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4398                         sdata->vif.bss_conf.sync_device_ts =
4399                                 bss->device_ts_presp;
4400                         sdata->vif.bss_conf.sync_dtim_count = 0;
4401                 } else {
4402                         sdata->vif.bss_conf.sync_tsf = 0;
4403                         sdata->vif.bss_conf.sync_device_ts = 0;
4404                         sdata->vif.bss_conf.sync_dtim_count = 0;
4405                 }
4406                 rcu_read_unlock();
4407
4408                 /* tell driver about BSSID, basic rates and timing */
4409                 ieee80211_bss_info_change_notify(sdata,
4410                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4411                         BSS_CHANGED_BEACON_INT);
4412
4413                 if (assoc)
4414                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4415
4416                 err = sta_info_insert(new_sta);
4417                 new_sta = NULL;
4418                 if (err) {
4419                         sdata_info(sdata,
4420                                    "failed to insert STA entry for the AP (error %d)\n",
4421                                    err);
4422                         return err;
4423                 }
4424         } else
4425                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4426
4427         /* Cancel scan to ensure that nothing interferes with connection */
4428         if (local->scanning)
4429                 ieee80211_scan_cancel(local);
4430
4431         return 0;
4432 }
4433
4434 /* config hooks */
4435 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4436                        struct cfg80211_auth_request *req)
4437 {
4438         struct ieee80211_local *local = sdata->local;
4439         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4440         struct ieee80211_mgd_auth_data *auth_data;
4441         u16 auth_alg;
4442         int err;
4443
4444         /* prepare auth data structure */
4445
4446         switch (req->auth_type) {
4447         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4448                 auth_alg = WLAN_AUTH_OPEN;
4449                 break;
4450         case NL80211_AUTHTYPE_SHARED_KEY:
4451                 if (IS_ERR(local->wep_tx_tfm))
4452                         return -EOPNOTSUPP;
4453                 auth_alg = WLAN_AUTH_SHARED_KEY;
4454                 break;
4455         case NL80211_AUTHTYPE_FT:
4456                 auth_alg = WLAN_AUTH_FT;
4457                 break;
4458         case NL80211_AUTHTYPE_NETWORK_EAP:
4459                 auth_alg = WLAN_AUTH_LEAP;
4460                 break;
4461         case NL80211_AUTHTYPE_SAE:
4462                 auth_alg = WLAN_AUTH_SAE;
4463                 break;
4464         default:
4465                 return -EOPNOTSUPP;
4466         }
4467
4468         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4469                             req->ie_len, GFP_KERNEL);
4470         if (!auth_data)
4471                 return -ENOMEM;
4472
4473         auth_data->bss = req->bss;
4474
4475         if (req->sae_data_len >= 4) {
4476                 __le16 *pos = (__le16 *) req->sae_data;
4477                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4478                 auth_data->sae_status = le16_to_cpu(pos[1]);
4479                 memcpy(auth_data->data, req->sae_data + 4,
4480                        req->sae_data_len - 4);
4481                 auth_data->data_len += req->sae_data_len - 4;
4482         }
4483
4484         if (req->ie && req->ie_len) {
4485                 memcpy(&auth_data->data[auth_data->data_len],
4486                        req->ie, req->ie_len);
4487                 auth_data->data_len += req->ie_len;
4488         }
4489
4490         if (req->key && req->key_len) {
4491                 auth_data->key_len = req->key_len;
4492                 auth_data->key_idx = req->key_idx;
4493                 memcpy(auth_data->key, req->key, req->key_len);
4494         }
4495
4496         auth_data->algorithm = auth_alg;
4497
4498         /* try to authenticate/probe */
4499
4500         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4501             ifmgd->assoc_data) {
4502                 err = -EBUSY;
4503                 goto err_free;
4504         }
4505
4506         if (ifmgd->auth_data)
4507                 ieee80211_destroy_auth_data(sdata, false);
4508
4509         /* prep auth_data so we don't go into idle on disassoc */
4510         ifmgd->auth_data = auth_data;
4511
4512         if (ifmgd->associated) {
4513                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4514
4515                 sdata_info(sdata,
4516                            "disconnect from AP %pM for new auth to %pM\n",
4517                            ifmgd->associated->bssid, req->bss->bssid);
4518                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4519                                        WLAN_REASON_UNSPECIFIED,
4520                                        false, frame_buf);
4521
4522                 ieee80211_report_disconnect(sdata, frame_buf,
4523                                             sizeof(frame_buf), true,
4524                                             WLAN_REASON_UNSPECIFIED);
4525         }
4526
4527         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4528
4529         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4530         if (err)
4531                 goto err_clear;
4532
4533         err = ieee80211_auth(sdata);
4534         if (err) {
4535                 sta_info_destroy_addr(sdata, req->bss->bssid);
4536                 goto err_clear;
4537         }
4538
4539         /* hold our own reference */
4540         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4541         return 0;
4542
4543  err_clear:
4544         eth_zero_addr(ifmgd->bssid);
4545         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4546         ifmgd->auth_data = NULL;
4547         mutex_lock(&sdata->local->mtx);
4548         ieee80211_vif_release_channel(sdata);
4549         mutex_unlock(&sdata->local->mtx);
4550  err_free:
4551         kfree(auth_data);
4552         return err;
4553 }
4554
4555 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4556                         struct cfg80211_assoc_request *req)
4557 {
4558         struct ieee80211_local *local = sdata->local;
4559         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4560         struct ieee80211_bss *bss = (void *)req->bss->priv;
4561         struct ieee80211_mgd_assoc_data *assoc_data;
4562         const struct cfg80211_bss_ies *beacon_ies;
4563         struct ieee80211_supported_band *sband;
4564         const u8 *ssidie, *ht_ie, *vht_ie;
4565         int i, err;
4566         bool override = false;
4567
4568         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4569         if (!assoc_data)
4570                 return -ENOMEM;
4571
4572         rcu_read_lock();
4573         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4574         if (!ssidie) {
4575                 rcu_read_unlock();
4576                 kfree(assoc_data);
4577                 return -EINVAL;
4578         }
4579         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4580         assoc_data->ssid_len = ssidie[1];
4581         rcu_read_unlock();
4582
4583         if (ifmgd->associated) {
4584                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4585
4586                 sdata_info(sdata,
4587                            "disconnect from AP %pM for new assoc to %pM\n",
4588                            ifmgd->associated->bssid, req->bss->bssid);
4589                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4590                                        WLAN_REASON_UNSPECIFIED,
4591                                        false, frame_buf);
4592
4593                 ieee80211_report_disconnect(sdata, frame_buf,
4594                                             sizeof(frame_buf), true,
4595                                             WLAN_REASON_UNSPECIFIED);
4596         }
4597
4598         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4599                 err = -EBUSY;
4600                 goto err_free;
4601         }
4602
4603         if (ifmgd->assoc_data) {
4604                 err = -EBUSY;
4605                 goto err_free;
4606         }
4607
4608         if (ifmgd->auth_data) {
4609                 bool match;
4610
4611                 /* keep sta info, bssid if matching */
4612                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4613                 ieee80211_destroy_auth_data(sdata, match);
4614         }
4615
4616         /* prepare assoc data */
4617
4618         ifmgd->beacon_crc_valid = false;
4619
4620         assoc_data->wmm = bss->wmm_used &&
4621                           (local->hw.queues >= IEEE80211_NUM_ACS);
4622
4623         /*
4624          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4625          * We still associate in non-HT mode (11a/b/g) if any one of these
4626          * ciphers is configured as pairwise.
4627          * We can set this to true for non-11n hardware, that'll be checked
4628          * separately along with the peer capabilities.
4629          */
4630         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4631                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4632                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4633                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4634                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4635                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4636                         netdev_info(sdata->dev,
4637                                     "disabling HT/VHT due to WEP/TKIP use\n");
4638                 }
4639         }
4640
4641         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4642         sband = local->hw.wiphy->bands[req->bss->channel->band];
4643         if (!sband->ht_cap.ht_supported ||
4644             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4645             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4646                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4647                 if (!bss->wmm_used &&
4648                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4649                         netdev_info(sdata->dev,
4650                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4651         }
4652
4653         /* disable VHT if we don't support it or the AP doesn't use WMM */
4654         if (!sband->vht_cap.vht_supported ||
4655             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4656             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4657                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4658                 if (!bss->wmm_used &&
4659                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4660                         netdev_info(sdata->dev,
4661                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4662         }
4663
4664         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4665         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4666                sizeof(ifmgd->ht_capa_mask));
4667
4668         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4669         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4670                sizeof(ifmgd->vht_capa_mask));
4671
4672         if (req->ie && req->ie_len) {
4673                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4674                 assoc_data->ie_len = req->ie_len;
4675         }
4676
4677         assoc_data->bss = req->bss;
4678
4679         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4680                 if (ifmgd->powersave)
4681                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4682                 else
4683                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4684         } else
4685                 sdata->smps_mode = ifmgd->req_smps;
4686
4687         assoc_data->capability = req->bss->capability;
4688         assoc_data->supp_rates = bss->supp_rates;
4689         assoc_data->supp_rates_len = bss->supp_rates_len;
4690
4691         rcu_read_lock();
4692         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4693         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4694                 assoc_data->ap_ht_param =
4695                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4696         else
4697                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4698         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4699         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4700                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4701                        sizeof(struct ieee80211_vht_cap));
4702         else
4703                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4704         rcu_read_unlock();
4705
4706         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4707                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4708              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4709                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4710
4711         if (bss->wmm_used && bss->uapsd_supported &&
4712             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4713                 assoc_data->uapsd = true;
4714                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4715         } else {
4716                 assoc_data->uapsd = false;
4717                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4718         }
4719
4720         if (req->prev_bssid)
4721                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4722
4723         if (req->use_mfp) {
4724                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4725                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4726         } else {
4727                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4728                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4729         }
4730
4731         if (req->flags & ASSOC_REQ_USE_RRM)
4732                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4733         else
4734                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4735
4736         if (req->crypto.control_port)
4737                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4738         else
4739                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4740
4741         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4742         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4743         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4744                                                         sdata->vif.type);
4745
4746         /* kick off associate process */
4747
4748         ifmgd->assoc_data = assoc_data;
4749         ifmgd->dtim_period = 0;
4750         ifmgd->have_beacon = false;
4751
4752         /* override HT/VHT configuration only if the AP and we support it */
4753         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4754                 struct ieee80211_sta_ht_cap sta_ht_cap;
4755
4756                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4757                         override = true;
4758
4759                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4760                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4761
4762                 /* check for 40 MHz disable override */
4763                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4764                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4765                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4766                         override = true;
4767
4768                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4769                     req->flags & ASSOC_REQ_DISABLE_VHT)
4770                         override = true;
4771         }
4772
4773         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4774                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4775                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4776         }
4777
4778         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4779                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4780
4781         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4782         if (err)
4783                 goto err_clear;
4784
4785         rcu_read_lock();
4786         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4787
4788         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4789             !beacon_ies) {
4790                 /*
4791                  * Wait up to one beacon interval ...
4792                  * should this be more if we miss one?
4793                  */
4794                 sdata_info(sdata, "waiting for beacon from %pM\n",
4795                            ifmgd->bssid);
4796                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4797                 assoc_data->timeout_started = true;
4798                 assoc_data->need_beacon = true;
4799         } else if (beacon_ies) {
4800                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4801                                                     beacon_ies->data,
4802                                                     beacon_ies->len);
4803                 u8 dtim_count = 0;
4804
4805                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4806                         const struct ieee80211_tim_ie *tim;
4807                         tim = (void *)(tim_ie + 2);
4808                         ifmgd->dtim_period = tim->dtim_period;
4809                         dtim_count = tim->dtim_count;
4810                 }
4811                 ifmgd->have_beacon = true;
4812                 assoc_data->timeout = jiffies;
4813                 assoc_data->timeout_started = true;
4814
4815                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4816                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4817                         sdata->vif.bss_conf.sync_device_ts =
4818                                 bss->device_ts_beacon;
4819                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4820                 }
4821         } else {
4822                 assoc_data->timeout = jiffies;
4823                 assoc_data->timeout_started = true;
4824         }
4825         rcu_read_unlock();
4826
4827         run_again(sdata, assoc_data->timeout);
4828
4829         if (bss->corrupt_data) {
4830                 char *corrupt_type = "data";
4831                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4832                         if (bss->corrupt_data &
4833                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4834                                 corrupt_type = "beacon and probe response";
4835                         else
4836                                 corrupt_type = "beacon";
4837                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4838                         corrupt_type = "probe response";
4839                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4840                            corrupt_type);
4841         }
4842
4843         return 0;
4844  err_clear:
4845         eth_zero_addr(ifmgd->bssid);
4846         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4847         ifmgd->assoc_data = NULL;
4848  err_free:
4849         kfree(assoc_data);
4850         return err;
4851 }
4852
4853 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4854                          struct cfg80211_deauth_request *req)
4855 {
4856         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4857         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4858         bool tx = !req->local_state_change;
4859
4860         if (ifmgd->auth_data &&
4861             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4862                 sdata_info(sdata,
4863                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4864                            req->bssid, req->reason_code,
4865                            ieee80211_get_reason_code_string(req->reason_code));
4866
4867                 drv_mgd_prepare_tx(sdata->local, sdata);
4868                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4869                                                IEEE80211_STYPE_DEAUTH,
4870                                                req->reason_code, tx,
4871                                                frame_buf);
4872                 ieee80211_destroy_auth_data(sdata, false);
4873                 ieee80211_report_disconnect(sdata, frame_buf,
4874                                             sizeof(frame_buf), true,
4875                                             req->reason_code);
4876
4877                 return 0;
4878         }
4879
4880         if (ifmgd->assoc_data &&
4881             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4882                 sdata_info(sdata,
4883                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4884                            req->bssid, req->reason_code,
4885                            ieee80211_get_reason_code_string(req->reason_code));
4886
4887                 drv_mgd_prepare_tx(sdata->local, sdata);
4888                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4889                                                IEEE80211_STYPE_DEAUTH,
4890                                                req->reason_code, tx,
4891                                                frame_buf);
4892                 ieee80211_destroy_assoc_data(sdata, false);
4893                 ieee80211_report_disconnect(sdata, frame_buf,
4894                                             sizeof(frame_buf), true,
4895                                             req->reason_code);
4896                 return 0;
4897         }
4898
4899         if (ifmgd->associated &&
4900             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4901                 sdata_info(sdata,
4902                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4903                            req->bssid, req->reason_code,
4904                            ieee80211_get_reason_code_string(req->reason_code));
4905
4906                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4907                                        req->reason_code, tx, frame_buf);
4908                 ieee80211_report_disconnect(sdata, frame_buf,
4909                                             sizeof(frame_buf), true,
4910                                             req->reason_code);
4911                 return 0;
4912         }
4913
4914         return -ENOTCONN;
4915 }
4916
4917 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4918                            struct cfg80211_disassoc_request *req)
4919 {
4920         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4921         u8 bssid[ETH_ALEN];
4922         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4923
4924         /*
4925          * cfg80211 should catch this ... but it's racy since
4926          * we can receive a disassoc frame, process it, hand it
4927          * to cfg80211 while that's in a locked section already
4928          * trying to tell us that the user wants to disconnect.
4929          */
4930         if (ifmgd->associated != req->bss)
4931                 return -ENOLINK;
4932
4933         sdata_info(sdata,
4934                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4935                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4936
4937         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4938         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4939                                req->reason_code, !req->local_state_change,
4940                                frame_buf);
4941
4942         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4943                                     req->reason_code);
4944
4945         return 0;
4946 }
4947
4948 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4949 {
4950         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4951
4952         /*
4953          * Make sure some work items will not run after this,
4954          * they will not do anything but might not have been
4955          * cancelled when disconnecting.
4956          */
4957         cancel_work_sync(&ifmgd->monitor_work);
4958         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4959         cancel_work_sync(&ifmgd->request_smps_work);
4960         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4961         cancel_work_sync(&ifmgd->chswitch_work);
4962         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4963
4964         sdata_lock(sdata);
4965         if (ifmgd->assoc_data) {
4966                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4967                 ieee80211_destroy_assoc_data(sdata, false);
4968                 cfg80211_assoc_timeout(sdata->dev, bss);
4969         }
4970         if (ifmgd->auth_data)
4971                 ieee80211_destroy_auth_data(sdata, false);
4972         spin_lock_bh(&ifmgd->teardown_lock);
4973         if (ifmgd->teardown_skb) {
4974                 kfree_skb(ifmgd->teardown_skb);
4975                 ifmgd->teardown_skb = NULL;
4976                 ifmgd->orig_teardown_skb = NULL;
4977         }
4978         spin_unlock_bh(&ifmgd->teardown_lock);
4979         del_timer_sync(&ifmgd->timer);
4980         sdata_unlock(sdata);
4981 }
4982
4983 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4984                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4985                                gfp_t gfp)
4986 {
4987         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4988
4989         trace_api_cqm_rssi_notify(sdata, rssi_event);
4990
4991         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4992 }
4993 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4994
4995 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4996 {
4997         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4998
4999         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5000
5001         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5002 }
5003 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);