net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33
  34 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  35 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  36 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  37 #define IEEE80211_AUTH_MAX_TRIES        3
  38 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  39 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  40 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  41 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  42 #define IEEE80211_ASSOC_MAX_TRIES       3
  43
  44 static int max_nullfunc_tries = 2;
  45 module_param(max_nullfunc_tries, int, 0644);
  46 MODULE_PARM_DESC(max_nullfunc_tries,
  47                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  48
  49 static int max_probe_tries = 5;
  50 module_param(max_probe_tries, int, 0644);
  51 MODULE_PARM_DESC(max_probe_tries,
  52                  "Maximum probe tries before disconnecting (reason 4).");
  53
  54 /*
  55  * Beacon loss timeout is calculated as N frames times the
  56  * advertised beacon interval.  This may need to be somewhat
  57  * higher than what hardware might detect to account for
  58  * delays in the host processing frames. But since we also
  59  * probe on beacon miss before declaring the connection lost
  60  * default to what we want.
  61  */
  62 static int beacon_loss_count = 7;
  63 module_param(beacon_loss_count, int, 0644);
  64 MODULE_PARM_DESC(beacon_loss_count,
  65                  "Number of beacon intervals before we decide beacon was lost.");
  66
  67 /*
  68  * Time the connection can be idle before we probe
  69  * it to see if we can still talk to the AP.
  70  */
  71 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  72 /*
  73  * Time we wait for a probe response after sending
  74  * a probe request because of beacon loss or for
  75  * checking the connection still works.
  76  */
  77 static int probe_wait_ms = 500;
  78 module_param(probe_wait_ms, int, 0644);
  79 MODULE_PARM_DESC(probe_wait_ms,
  80                  "Maximum time(ms) to wait for probe response"
  81                  " before disconnecting (reason 4).");
  82
  83 /*
  84  * How many Beacon frames need to have been used in average signal strength
  85  * before starting to indicate signal change events.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  88
  89 /*
  90  * We can have multiple work items (and connection probing)
  91  * scheduling this timer, but we need to take care to only
  92  * reschedule it when it should fire _earlier_ than it was
  93  * asked for before, or if it's not pending right now. This
  94  * function ensures that. Note that it then is required to
  95  * run this function for all timeouts after the first one
  96  * has happened -- the work that runs from this timer will
  97  * do that.
  98  */
  99 static void run_again(struct ieee80211_sub_if_data *sdata,
 100                       unsigned long timeout)
 101 {
 102         sdata_assert_lock(sdata);
 103
 104         if (!timer_pending(&sdata->u.mgd.timer) ||
 105             time_before(timeout, sdata->u.mgd.timer.expires))
 106                 mod_timer(&sdata->u.mgd.timer, timeout);
 107 }
 108
 109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 110 {
 111         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 112                 return;
 113
 114         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 115                 return;
 116
 117         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 118                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 119 }
 120
 121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 122 {
 123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 124
 125         if (unlikely(!sdata->u.mgd.associated))
 126                 return;
 127
 128         ifmgd->probe_send_count = 0;
 129
 130         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 131                 return;
 132
 133         mod_timer(&sdata->u.mgd.conn_mon_timer,
 134                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 135 }
 136
 137 static int ecw2cw(int ecw)
 138 {
 139         return (1 << ecw) - 1;
 140 }
 141
 142 static u32
 143 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 144                              struct ieee80211_supported_band *sband,
 145                              struct ieee80211_channel *channel,
 146                              const struct ieee80211_ht_cap *ht_cap,
 147                              const struct ieee80211_ht_operation *ht_oper,
 148                              const struct ieee80211_vht_operation *vht_oper,
 149                              struct cfg80211_chan_def *chandef, bool tracking)
 150 {
 151         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 152         struct cfg80211_chan_def vht_chandef;
 153         struct ieee80211_sta_ht_cap sta_ht_cap;
 154         u32 ht_cfreq, ret;
 155
 156         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 157         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 158
 159         chandef->chan = channel;
 160         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 161         chandef->center_freq1 = channel->center_freq;
 162         chandef->center_freq2 = 0;
 163
 164         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 165                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 166                 goto out;
 167         }
 168
 169         chandef->width = NL80211_CHAN_WIDTH_20;
 170
 171         if (!(ht_cap->cap_info &
 172               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 173                 ret = IEEE80211_STA_DISABLE_40MHZ;
 174                 vht_chandef = *chandef;
 175                 goto out;
 176         }
 177
 178         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 179                                                   channel->band);
 180         /* check that channel matches the right operating channel */
 181         if (!tracking && channel->center_freq != ht_cfreq) {
 182                 /*
 183                  * It's possible that some APs are confused here;
 184                  * Netgear WNDR3700 sometimes reports 4 higher than
 185                  * the actual channel in association responses, but
 186                  * since we look at probe response/beacon data here
 187                  * it should be OK.
 188                  */
 189                 sdata_info(sdata,
 190                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 191                            channel->center_freq, ht_cfreq,
 192                            ht_oper->primary_chan, channel->band);
 193                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 194                 goto out;
 195         }
 196
 197         /* check 40 MHz support, if we have it */
 198         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 199                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 200                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 201                         chandef->width = NL80211_CHAN_WIDTH_40;
 202                         chandef->center_freq1 += 10;
 203                         break;
 204                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 205                         chandef->width = NL80211_CHAN_WIDTH_40;
 206                         chandef->center_freq1 -= 10;
 207                         break;
 208                 }
 209         } else {
 210                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 211                 ret = IEEE80211_STA_DISABLE_VHT;
 212                 /* also mark 40 MHz disabled */
 213                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 214                 goto out;
 215         }
 216
 217         if (!vht_oper || !sband->vht_cap.vht_supported) {
 218                 ret = IEEE80211_STA_DISABLE_VHT;
 219                 goto out;
 220         }
 221
 222         vht_chandef.chan = channel;
 223         vht_chandef.center_freq1 =
 224                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 225                                                channel->band);
 226         vht_chandef.center_freq2 = 0;
 227
 228         switch (vht_oper->chan_width) {
 229         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 230                 vht_chandef.width = chandef->width;
 231                 vht_chandef.center_freq1 = chandef->center_freq1;
 232                 break;
 233         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 234                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 235                 break;
 236         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 237                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 238                 break;
 239         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 240                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 241                 vht_chandef.center_freq2 =
 242                         ieee80211_channel_to_frequency(
 243                                 vht_oper->center_freq_seg2_idx,
 244                                 channel->band);
 245                 break;
 246         default:
 247                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 248                         sdata_info(sdata,
 249                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 250                                    vht_oper->chan_width);
 251                 ret = IEEE80211_STA_DISABLE_VHT;
 252                 goto out;
 253         }
 254
 255         if (!cfg80211_chandef_valid(&vht_chandef)) {
 256                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 257                         sdata_info(sdata,
 258                                    "AP VHT information is invalid, disable VHT\n");
 259                 ret = IEEE80211_STA_DISABLE_VHT;
 260                 goto out;
 261         }
 262
 263         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 264                 ret = 0;
 265                 goto out;
 266         }
 267
 268         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 269                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 270                         sdata_info(sdata,
 271                                    "AP VHT information doesn't match HT, disable VHT\n");
 272                 ret = IEEE80211_STA_DISABLE_VHT;
 273                 goto out;
 274         }
 275
 276         *chandef = vht_chandef;
 277
 278         ret = 0;
 279
 280 out:
 281         /*
 282          * When tracking the current AP, don't do any further checks if the
 283          * new chandef is identical to the one we're currently using for the
 284          * connection. This keeps us from playing ping-pong with regulatory,
 285          * without it the following can happen (for example):
 286          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 287          *  - AP advertises regdom US
 288          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 289          *  - the code below detects an unsupported channel, downgrades, and
 290          *    we disconnect from the AP in the caller
 291          *  - disconnect causes CRDA to reload world regdomain and the game
 292          *    starts anew.
 293          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 294          *
 295          * It seems possible that there are still scenarios with CSA or real
 296          * bandwidth changes where a this could happen, but those cases are
 297          * less common and wouldn't completely prevent using the AP.
 298          */
 299         if (tracking &&
 300             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 301                 return ret;
 302
 303         /* don't print the message below for VHT mismatch if VHT is disabled */
 304         if (ret & IEEE80211_STA_DISABLE_VHT)
 305                 vht_chandef = *chandef;
 306
 307         /*
 308          * Ignore the DISABLED flag when we're already connected and only
 309          * tracking the APs beacon for bandwidth changes - otherwise we
 310          * might get disconnected here if we connect to an AP, update our
 311          * regulatory information based on the AP's country IE and the
 312          * information we have is wrong/outdated and disables the channel
 313          * that we're actually using for the connection to the AP.
 314          */
 315         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 316                                         tracking ? 0 :
 317                                                    IEEE80211_CHAN_DISABLED)) {
 318                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 319                         ret = IEEE80211_STA_DISABLE_HT |
 320                               IEEE80211_STA_DISABLE_VHT;
 321                         break;
 322                 }
 323
 324                 ret |= ieee80211_chandef_downgrade(chandef);
 325         }
 326
 327         if (chandef->width != vht_chandef.width && !tracking)
 328                 sdata_info(sdata,
 329                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 330
 331         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 332         return ret;
 333 }
 334
 335 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 336                                struct sta_info *sta,
 337                                const struct ieee80211_ht_cap *ht_cap,
 338                                const struct ieee80211_ht_operation *ht_oper,
 339                                const struct ieee80211_vht_operation *vht_oper,
 340                                const u8 *bssid, u32 *changed)
 341 {
 342         struct ieee80211_local *local = sdata->local;
 343         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 344         struct ieee80211_supported_band *sband;
 345         struct ieee80211_channel *chan;
 346         struct cfg80211_chan_def chandef;
 347         u16 ht_opmode;
 348         u32 flags;
 349         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 350         int ret;
 351
 352         /* if HT was/is disabled, don't track any bandwidth changes */
 353         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 354                 return 0;
 355
 356         /* don't check VHT if we associated as non-VHT station */
 357         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 358                 vht_oper = NULL;
 359
 360         if (WARN_ON_ONCE(!sta))
 361                 return -EINVAL;
 362
 363         /*
 364          * if bss configuration changed store the new one -
 365          * this may be applicable even if channel is identical
 366          */
 367         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 368         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 369                 *changed |= BSS_CHANGED_HT;
 370                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 371         }
 372
 373         chan = sdata->vif.bss_conf.chandef.chan;
 374         sband = local->hw.wiphy->bands[chan->band];
 375
 376         /* calculate new channel (type) based on HT/VHT operation IEs */
 377         flags = ieee80211_determine_chantype(sdata, sband, chan,
 378                                              ht_cap, ht_oper, vht_oper,
 379                                              &chandef, true);
 380
 381         /*
 382          * Downgrade the new channel if we associated with restricted
 383          * capabilities. For example, if we associated as a 20 MHz STA
 384          * to a 40 MHz AP (due to regulatory, capabilities or config
 385          * reasons) then switching to a 40 MHz channel now won't do us
 386          * any good -- we couldn't use it with the AP.
 387          */
 388         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 389             chandef.width == NL80211_CHAN_WIDTH_80P80)
 390                 flags |= ieee80211_chandef_downgrade(&chandef);
 391         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 392             chandef.width == NL80211_CHAN_WIDTH_160)
 393                 flags |= ieee80211_chandef_downgrade(&chandef);
 394         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 395             chandef.width > NL80211_CHAN_WIDTH_20)
 396                 flags |= ieee80211_chandef_downgrade(&chandef);
 397
 398         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 399                 return 0;
 400
 401         sdata_info(sdata,
 402                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 403                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 404                    chandef.center_freq1, chandef.center_freq2);
 405
 406         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 407                                       IEEE80211_STA_DISABLE_VHT |
 408                                       IEEE80211_STA_DISABLE_40MHZ |
 409                                       IEEE80211_STA_DISABLE_80P80MHZ |
 410                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 411             !cfg80211_chandef_valid(&chandef)) {
 412                 sdata_info(sdata,
 413                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 414                            ifmgd->bssid);
 415                 return -EINVAL;
 416         }
 417
 418         switch (chandef.width) {
 419         case NL80211_CHAN_WIDTH_20_NOHT:
 420         case NL80211_CHAN_WIDTH_20:
 421                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 422                 break;
 423         case NL80211_CHAN_WIDTH_40:
 424                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 425                 break;
 426         case NL80211_CHAN_WIDTH_80:
 427                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 428                 break;
 429         case NL80211_CHAN_WIDTH_80P80:
 430         case NL80211_CHAN_WIDTH_160:
 431                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 432                 break;
 433         default:
 434                 return -EINVAL;
 435         }
 436
 437         if (new_sta_bw > sta->cur_max_bandwidth)
 438                 new_sta_bw = sta->cur_max_bandwidth;
 439
 440         if (new_sta_bw < sta->sta.bandwidth) {
 441                 sta->sta.bandwidth = new_sta_bw;
 442                 rate_control_rate_update(local, sband, sta,
 443                                          IEEE80211_RC_BW_CHANGED);
 444         }
 445
 446         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 447         if (ret) {
 448                 sdata_info(sdata,
 449                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 450                            ifmgd->bssid);
 451                 return ret;
 452         }
 453
 454         if (new_sta_bw > sta->sta.bandwidth) {
 455                 sta->sta.bandwidth = new_sta_bw;
 456                 rate_control_rate_update(local, sband, sta,
 457                                          IEEE80211_RC_BW_CHANGED);
 458         }
 459
 460         return 0;
 461 }
 462
 463 /* frame sending functions */
 464
 465 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 466                                 struct sk_buff *skb, u8 ap_ht_param,
 467                                 struct ieee80211_supported_band *sband,
 468                                 struct ieee80211_channel *channel,
 469                                 enum ieee80211_smps_mode smps)
 470 {
 471         u8 *pos;
 472         u32 flags = channel->flags;
 473         u16 cap;
 474         struct ieee80211_sta_ht_cap ht_cap;
 475
 476         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 477
 478         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 479         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 480
 481         /* determine capability flags */
 482         cap = ht_cap.cap;
 483
 484         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 485         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 486                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 487                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 488                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 489                 }
 490                 break;
 491         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 492                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 493                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 494                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 495                 }
 496                 break;
 497         }
 498
 499         /*
 500          * If 40 MHz was disabled associate as though we weren't
 501          * capable of 40 MHz -- some broken APs will never fall
 502          * back to trying to transmit in 20 MHz.
 503          */
 504         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 505                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 506                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 507         }
 508
 509         /* set SM PS mode properly */
 510         cap &= ~IEEE80211_HT_CAP_SM_PS;
 511         switch (smps) {
 512         case IEEE80211_SMPS_AUTOMATIC:
 513         case IEEE80211_SMPS_NUM_MODES:
 514                 WARN_ON(1);
 515         case IEEE80211_SMPS_OFF:
 516                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 517                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 518                 break;
 519         case IEEE80211_SMPS_STATIC:
 520                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 521                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 522                 break;
 523         case IEEE80211_SMPS_DYNAMIC:
 524                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 525                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 526                 break;
 527         }
 528
 529         /* reserve and fill IE */
 530         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 531         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 532 }
 533
 534 /* This function determines vht capability flags for the association
 535  * and builds the IE.
 536  * Note - the function may set the owner of the MU-MIMO capability
 537  */
 538 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 539                                  struct sk_buff *skb,
 540                                  struct ieee80211_supported_band *sband,
 541                                  struct ieee80211_vht_cap *ap_vht_cap)
 542 {
 543         struct ieee80211_local *local = sdata->local;
 544         u8 *pos;
 545         u32 cap;
 546         struct ieee80211_sta_vht_cap vht_cap;
 547         u32 mask, ap_bf_sts, our_bf_sts;
 548
 549         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 550
 551         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 552         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 553
 554         /* determine capability flags */
 555         cap = vht_cap.cap;
 556
 557         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 558                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 559
 560                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 561                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 562                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 563                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 564         }
 565
 566         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 567                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 568                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 569         }
 570
 571         /*
 572          * Some APs apparently get confused if our capabilities are better
 573          * than theirs, so restrict what we advertise in the assoc request.
 574          */
 575         if (!(ap_vht_cap->vht_cap_info &
 576                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 577                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 578                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 579         else if (!(ap_vht_cap->vht_cap_info &
 580                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 581                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 582
 583         /*
 584          * If some other vif is using the MU-MIMO capablity we cannot associate
 585          * using MU-MIMO - this will lead to contradictions in the group-id
 586          * mechanism.
 587          * Ownership is defined since association request, in order to avoid
 588          * simultaneous associations with MU-MIMO.
 589          */
 590         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 591                 bool disable_mu_mimo = false;
 592                 struct ieee80211_sub_if_data *other;
 593
 594                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 595                         if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
 596                                 disable_mu_mimo = true;
 597                                 break;
 598                         }
 599                 }
 600                 if (disable_mu_mimo)
 601                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 602                 else
 603                         sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
 604         }
 605
 606         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 607
 608         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 609         our_bf_sts = cap & mask;
 610
 611         if (ap_bf_sts < our_bf_sts) {
 612                 cap &= ~mask;
 613                 cap |= ap_bf_sts;
 614         }
 615
 616         /* reserve and fill IE */
 617         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 618         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 619 }
 620
 621 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 622 {
 623         struct ieee80211_local *local = sdata->local;
 624         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 625         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 626         struct sk_buff *skb;
 627         struct ieee80211_mgmt *mgmt;
 628         u8 *pos, qos_info;
 629         size_t offset = 0, noffset;
 630         int i, count, rates_len, supp_rates_len, shift;
 631         u16 capab;
 632         struct ieee80211_supported_band *sband;
 633         struct ieee80211_chanctx_conf *chanctx_conf;
 634         struct ieee80211_channel *chan;
 635         u32 rate_flags, rates = 0;
 636
 637         sdata_assert_lock(sdata);
 638
 639         rcu_read_lock();
 640         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 641         if (WARN_ON(!chanctx_conf)) {
 642                 rcu_read_unlock();
 643                 return;
 644         }
 645         chan = chanctx_conf->def.chan;
 646         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 647         rcu_read_unlock();
 648         sband = local->hw.wiphy->bands[chan->band];
 649         shift = ieee80211_vif_get_shift(&sdata->vif);
 650
 651         if (assoc_data->supp_rates_len) {
 652                 /*
 653                  * Get all rates supported by the device and the AP as
 654                  * some APs don't like getting a superset of their rates
 655                  * in the association request (e.g. D-Link DAP 1353 in
 656                  * b-only mode)...
 657                  */
 658                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 659                                                      assoc_data->supp_rates,
 660                                                      assoc_data->supp_rates_len,
 661                                                      &rates);
 662         } else {
 663                 /*
 664                  * In case AP not provide any supported rates information
 665                  * before association, we send information element(s) with
 666                  * all rates that we support.
 667                  */
 668                 rates_len = 0;
 669                 for (i = 0; i < sband->n_bitrates; i++) {
 670                         if ((rate_flags & sband->bitrates[i].flags)
 671                             != rate_flags)
 672                                 continue;
 673                         rates |= BIT(i);
 674                         rates_len++;
 675                 }
 676         }
 677
 678         skb = alloc_skb(local->hw.extra_tx_headroom +
 679                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 680                         2 + assoc_data->ssid_len + /* SSID */
 681                         4 + rates_len + /* (extended) rates */
 682                         4 + /* power capability */
 683                         2 + 2 * sband->n_channels + /* supported channels */
 684                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 685                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 686                         assoc_data->ie_len + /* extra IEs */
 687                         9, /* WMM */
 688                         GFP_KERNEL);
 689         if (!skb)
 690                 return;
 691
 692         skb_reserve(skb, local->hw.extra_tx_headroom);
 693
 694         capab = WLAN_CAPABILITY_ESS;
 695
 696         if (sband->band == IEEE80211_BAND_2GHZ) {
 697                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 698                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 699         }
 700
 701         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 702                 capab |= WLAN_CAPABILITY_PRIVACY;
 703
 704         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 705             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 706                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 707
 708         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 709                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 710
 711         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 712         memset(mgmt, 0, 24);
 713         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 714         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 715         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 716
 717         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 718                 skb_put(skb, 10);
 719                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 720                                                   IEEE80211_STYPE_REASSOC_REQ);
 721                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 722                 mgmt->u.reassoc_req.listen_interval =
 723                                 cpu_to_le16(local->hw.conf.listen_interval);
 724                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 725                        ETH_ALEN);
 726         } else {
 727                 skb_put(skb, 4);
 728                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 729                                                   IEEE80211_STYPE_ASSOC_REQ);
 730                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 731                 mgmt->u.assoc_req.listen_interval =
 732                                 cpu_to_le16(local->hw.conf.listen_interval);
 733         }
 734
 735         /* SSID */
 736         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 737         *pos++ = WLAN_EID_SSID;
 738         *pos++ = assoc_data->ssid_len;
 739         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 740
 741         /* add all rates which were marked to be used above */
 742         supp_rates_len = rates_len;
 743         if (supp_rates_len > 8)
 744                 supp_rates_len = 8;
 745
 746         pos = skb_put(skb, supp_rates_len + 2);
 747         *pos++ = WLAN_EID_SUPP_RATES;
 748         *pos++ = supp_rates_len;
 749
 750         count = 0;
 751         for (i = 0; i < sband->n_bitrates; i++) {
 752                 if (BIT(i) & rates) {
 753                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 754                                                 5 * (1 << shift));
 755                         *pos++ = (u8) rate;
 756                         if (++count == 8)
 757                                 break;
 758                 }
 759         }
 760
 761         if (rates_len > count) {
 762                 pos = skb_put(skb, rates_len - count + 2);
 763                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 764                 *pos++ = rates_len - count;
 765
 766                 for (i++; i < sband->n_bitrates; i++) {
 767                         if (BIT(i) & rates) {
 768                                 int rate;
 769                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 770                                                     5 * (1 << shift));
 771                                 *pos++ = (u8) rate;
 772                         }
 773                 }
 774         }
 775
 776         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 777             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 778                 pos = skb_put(skb, 4);
 779                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 780                 *pos++ = 2;
 781                 *pos++ = 0; /* min tx power */
 782                  /* max tx power */
 783                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 784         }
 785
 786         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 787                 /* TODO: get this in reg domain format */
 788                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 789                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 790                 *pos++ = 2 * sband->n_channels;
 791                 for (i = 0; i < sband->n_channels; i++) {
 792                         *pos++ = ieee80211_frequency_to_channel(
 793                                         sband->channels[i].center_freq);
 794                         *pos++ = 1; /* one channel in the subband*/
 795                 }
 796         }
 797
 798         /* if present, add any custom IEs that go before HT */
 799         if (assoc_data->ie_len) {
 800                 static const u8 before_ht[] = {
 801                         WLAN_EID_SSID,
 802                         WLAN_EID_SUPP_RATES,
 803                         WLAN_EID_EXT_SUPP_RATES,
 804                         WLAN_EID_PWR_CAPABILITY,
 805                         WLAN_EID_SUPPORTED_CHANNELS,
 806                         WLAN_EID_RSN,
 807                         WLAN_EID_QOS_CAPA,
 808                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 809                         WLAN_EID_MOBILITY_DOMAIN,
 810                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 811                         WLAN_EID_RIC_DATA,              /* reassoc only */
 812                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 813                 };
 814                 static const u8 after_ric[] = {
 815                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 816                         WLAN_EID_HT_CAPABILITY,
 817                         WLAN_EID_BSS_COEX_2040,
 818                         WLAN_EID_EXT_CAPABILITY,
 819                         WLAN_EID_QOS_TRAFFIC_CAPA,
 820                         WLAN_EID_TIM_BCAST_REQ,
 821                         WLAN_EID_INTERWORKING,
 822                         /* 60GHz doesn't happen right now */
 823                         WLAN_EID_VHT_CAPABILITY,
 824                         WLAN_EID_OPMODE_NOTIF,
 825                 };
 826
 827                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 828                                                  assoc_data->ie_len,
 829                                                  before_ht,
 830                                                  ARRAY_SIZE(before_ht),
 831                                                  after_ric,
 832                                                  ARRAY_SIZE(after_ric),
 833                                                  offset);
 834                 pos = skb_put(skb, noffset - offset);
 835                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 836                 offset = noffset;
 837         }
 838
 839         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 840                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 841                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 842
 843         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 844                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 845                                     sband, chan, sdata->smps_mode);
 846
 847         /* if present, add any custom IEs that go before VHT */
 848         if (assoc_data->ie_len) {
 849                 static const u8 before_vht[] = {
 850                         WLAN_EID_SSID,
 851                         WLAN_EID_SUPP_RATES,
 852                         WLAN_EID_EXT_SUPP_RATES,
 853                         WLAN_EID_PWR_CAPABILITY,
 854                         WLAN_EID_SUPPORTED_CHANNELS,
 855                         WLAN_EID_RSN,
 856                         WLAN_EID_QOS_CAPA,
 857                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 858                         WLAN_EID_MOBILITY_DOMAIN,
 859                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 860                         WLAN_EID_HT_CAPABILITY,
 861                         WLAN_EID_BSS_COEX_2040,
 862                         WLAN_EID_EXT_CAPABILITY,
 863                         WLAN_EID_QOS_TRAFFIC_CAPA,
 864                         WLAN_EID_TIM_BCAST_REQ,
 865                         WLAN_EID_INTERWORKING,
 866                 };
 867
 868                 /* RIC already taken above, so no need to handle here anymore */
 869                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 870                                              before_vht, ARRAY_SIZE(before_vht),
 871                                              offset);
 872                 pos = skb_put(skb, noffset - offset);
 873                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 874                 offset = noffset;
 875         }
 876
 877         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 878                 ieee80211_add_vht_ie(sdata, skb, sband,
 879                                      &assoc_data->ap_vht_cap);
 880
 881         /* if present, add any custom non-vendor IEs that go after HT */
 882         if (assoc_data->ie_len) {
 883                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 884                                                     assoc_data->ie_len,
 885                                                     offset);
 886                 pos = skb_put(skb, noffset - offset);
 887                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 888                 offset = noffset;
 889         }
 890
 891         if (assoc_data->wmm) {
 892                 if (assoc_data->uapsd) {
 893                         qos_info = ifmgd->uapsd_queues;
 894                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 895                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 896                 } else {
 897                         qos_info = 0;
 898                 }
 899
 900                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 901         }
 902
 903         /* add any remaining custom (i.e. vendor specific here) IEs */
 904         if (assoc_data->ie_len) {
 905                 noffset = assoc_data->ie_len;
 906                 pos = skb_put(skb, noffset - offset);
 907                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 908         }
 909
 910         drv_mgd_prepare_tx(local, sdata);
 911
 912         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 913         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 914                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 915                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 916         ieee80211_tx_skb(sdata, skb);
 917 }
 918
 919 void ieee80211_send_pspoll(struct ieee80211_local *local,
 920                            struct ieee80211_sub_if_data *sdata)
 921 {
 922         struct ieee80211_pspoll *pspoll;
 923         struct sk_buff *skb;
 924
 925         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 926         if (!skb)
 927                 return;
 928
 929         pspoll = (struct ieee80211_pspoll *) skb->data;
 930         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 931
 932         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 933         ieee80211_tx_skb(sdata, skb);
 934 }
 935
 936 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 937                              struct ieee80211_sub_if_data *sdata,
 938                              bool powersave)
 939 {
 940         struct sk_buff *skb;
 941         struct ieee80211_hdr_3addr *nullfunc;
 942         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 943
 944         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 945         if (!skb)
 946                 return;
 947
 948         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 949         if (powersave)
 950                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 951
 952         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 953                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 954
 955         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 956                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 957
 958         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 959                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 960
 961         ieee80211_tx_skb(sdata, skb);
 962 }
 963
 964 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 965                                           struct ieee80211_sub_if_data *sdata)
 966 {
 967         struct sk_buff *skb;
 968         struct ieee80211_hdr *nullfunc;
 969         __le16 fc;
 970
 971         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 972                 return;
 973
 974         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 975         if (!skb)
 976                 return;
 977
 978         skb_reserve(skb, local->hw.extra_tx_headroom);
 979
 980         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 981         memset(nullfunc, 0, 30);
 982         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 983                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 984         nullfunc->frame_control = fc;
 985         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 986         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 987         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 988         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 989
 990         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 991         ieee80211_tx_skb(sdata, skb);
 992 }
 993
 994 /* spectrum management related things */
 995 static void ieee80211_chswitch_work(struct work_struct *work)
 996 {
 997         struct ieee80211_sub_if_data *sdata =
 998                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 999         struct ieee80211_local *local = sdata->local;
1000         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1001         int ret;
1002
1003         if (!ieee80211_sdata_running(sdata))
1004                 return;
1005
1006         sdata_lock(sdata);
1007         mutex_lock(&local->mtx);
1008         mutex_lock(&local->chanctx_mtx);
1009
1010         if (!ifmgd->associated)
1011                 goto out;
1012
1013         if (!sdata->vif.csa_active)
1014                 goto out;
1015
1016         /*
1017          * using reservation isn't immediate as it may be deferred until later
1018          * with multi-vif. once reservation is complete it will re-schedule the
1019          * work with no reserved_chanctx so verify chandef to check if it
1020          * completed successfully
1021          */
1022
1023         if (sdata->reserved_chanctx) {
1024                 struct ieee80211_supported_band *sband = NULL;
1025                 struct sta_info *mgd_sta = NULL;
1026                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1027
1028                 /*
1029                  * with multi-vif csa driver may call ieee80211_csa_finish()
1030                  * many times while waiting for other interfaces to use their
1031                  * reservations
1032                  */
1033                 if (sdata->reserved_ready)
1034                         goto out;
1035
1036                 if (sdata->vif.bss_conf.chandef.width !=
1037                     sdata->csa_chandef.width) {
1038                         /*
1039                          * For managed interface, we need to also update the AP
1040                          * station bandwidth and align the rate scale algorithm
1041                          * on the bandwidth change. Here we only consider the
1042                          * bandwidth of the new channel definition (as channel
1043                          * switch flow does not have the full HT/VHT/HE
1044                          * information), assuming that if additional changes are
1045                          * required they would be done as part of the processing
1046                          * of the next beacon from the AP.
1047                          */
1048                         switch (sdata->csa_chandef.width) {
1049                         case NL80211_CHAN_WIDTH_20_NOHT:
1050                         case NL80211_CHAN_WIDTH_20:
1051                         default:
1052                                 bw = IEEE80211_STA_RX_BW_20;
1053                                 break;
1054                         case NL80211_CHAN_WIDTH_40:
1055                                 bw = IEEE80211_STA_RX_BW_40;
1056                                 break;
1057                         case NL80211_CHAN_WIDTH_80:
1058                                 bw = IEEE80211_STA_RX_BW_80;
1059                                 break;
1060                         case NL80211_CHAN_WIDTH_80P80:
1061                         case NL80211_CHAN_WIDTH_160:
1062                                 bw = IEEE80211_STA_RX_BW_160;
1063                                 break;
1064                         }
1065
1066                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1067                         sband =
1068                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1069                 }
1070
1071                 if (sdata->vif.bss_conf.chandef.width >
1072                     sdata->csa_chandef.width) {
1073                         mgd_sta->sta.bandwidth = bw;
1074                         rate_control_rate_update(local, sband, mgd_sta,
1075                                                  IEEE80211_RC_BW_CHANGED);
1076                 }
1077
1078                 ret = ieee80211_vif_use_reserved_context(sdata);
1079                 if (ret) {
1080                         sdata_info(sdata,
1081                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1082                                    ret);
1083                         ieee80211_queue_work(&sdata->local->hw,
1084                                              &ifmgd->csa_connection_drop_work);
1085                         goto out;
1086                 }
1087
1088                 if (sdata->vif.bss_conf.chandef.width <
1089                     sdata->csa_chandef.width) {
1090                         mgd_sta->sta.bandwidth = bw;
1091                         rate_control_rate_update(local, sband, mgd_sta,
1092                                                  IEEE80211_RC_BW_CHANGED);
1093                 }
1094
1095                 goto out;
1096         }
1097
1098         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1099                                         &sdata->csa_chandef)) {
1100                 sdata_info(sdata,
1101                            "failed to finalize channel switch, disconnecting\n");
1102                 ieee80211_queue_work(&sdata->local->hw,
1103                                      &ifmgd->csa_connection_drop_work);
1104                 goto out;
1105         }
1106
1107         ifmgd->csa_waiting_bcn = true;
1108
1109         ieee80211_sta_reset_beacon_monitor(sdata);
1110         ieee80211_sta_reset_conn_monitor(sdata);
1111
1112 out:
1113         mutex_unlock(&local->chanctx_mtx);
1114         mutex_unlock(&local->mtx);
1115         sdata_unlock(sdata);
1116 }
1117
1118 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1119 {
1120         struct ieee80211_local *local = sdata->local;
1121         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1122         int ret;
1123
1124         sdata_assert_lock(sdata);
1125
1126         WARN_ON(!sdata->vif.csa_active);
1127
1128         if (sdata->csa_block_tx) {
1129                 ieee80211_wake_vif_queues(local, sdata,
1130                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1131                 sdata->csa_block_tx = false;
1132         }
1133
1134         sdata->vif.csa_active = false;
1135         ifmgd->csa_waiting_bcn = false;
1136
1137         ret = drv_post_channel_switch(sdata);
1138         if (ret) {
1139                 sdata_info(sdata,
1140                            "driver post channel switch failed, disconnecting\n");
1141                 ieee80211_queue_work(&local->hw,
1142                                      &ifmgd->csa_connection_drop_work);
1143                 return;
1144         }
1145
1146         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1147 }
1148
1149 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1150 {
1151         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1152         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1153
1154         trace_api_chswitch_done(sdata, success);
1155         if (!success) {
1156                 sdata_info(sdata,
1157                            "driver channel switch failed, disconnecting\n");
1158                 ieee80211_queue_work(&sdata->local->hw,
1159                                      &ifmgd->csa_connection_drop_work);
1160         } else {
1161                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1162         }
1163 }
1164 EXPORT_SYMBOL(ieee80211_chswitch_done);
1165
1166 static void ieee80211_chswitch_timer(unsigned long data)
1167 {
1168         struct ieee80211_sub_if_data *sdata =
1169                 (struct ieee80211_sub_if_data *) data;
1170
1171         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1172 }
1173
1174 static void
1175 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1176                                  u64 timestamp, u32 device_timestamp,
1177                                  struct ieee802_11_elems *elems,
1178                                  bool beacon)
1179 {
1180         struct ieee80211_local *local = sdata->local;
1181         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1182         struct cfg80211_bss *cbss = ifmgd->associated;
1183         struct ieee80211_chanctx_conf *conf;
1184         struct ieee80211_chanctx *chanctx;
1185         enum ieee80211_band current_band;
1186         struct ieee80211_csa_ie csa_ie;
1187         struct ieee80211_channel_switch ch_switch;
1188         int res;
1189
1190         sdata_assert_lock(sdata);
1191
1192         if (!cbss)
1193                 return;
1194
1195         if (local->scanning)
1196                 return;
1197
1198         /* disregard subsequent announcements if we are already processing */
1199         if (sdata->vif.csa_active)
1200                 return;
1201
1202         current_band = cbss->channel->band;
1203         memset(&csa_ie, 0, sizeof(csa_ie));
1204         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1205                                            ifmgd->flags,
1206                                            ifmgd->associated->bssid, &csa_ie);
1207         if (res < 0)
1208                 ieee80211_queue_work(&local->hw,
1209                                      &ifmgd->csa_connection_drop_work);
1210         if (res)
1211                 return;
1212
1213         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1214                                      IEEE80211_CHAN_DISABLED)) {
1215                 sdata_info(sdata,
1216                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1217                            ifmgd->associated->bssid,
1218                            csa_ie.chandef.chan->center_freq,
1219                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1220                            csa_ie.chandef.center_freq2);
1221                 ieee80211_queue_work(&local->hw,
1222                                      &ifmgd->csa_connection_drop_work);
1223                 return;
1224         }
1225
1226         if (cfg80211_chandef_identical(&csa_ie.chandef,
1227                                        &sdata->vif.bss_conf.chandef)) {
1228                 if (ifmgd->csa_ignored_same_chan)
1229                         return;
1230                 sdata_info(sdata,
1231                            "AP %pM tries to chanswitch to same channel, ignore\n",
1232                            ifmgd->associated->bssid);
1233                 ifmgd->csa_ignored_same_chan = true;
1234                 return;
1235         }
1236
1237         /*
1238          * Drop all TDLS peers - either we disconnect or move to a different
1239          * channel from this point on. There's no telling what our peer will do.
1240          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1241          * have an incompatible wider chandef.
1242          */
1243         ieee80211_teardown_tdls_peers(sdata);
1244
1245         mutex_lock(&local->mtx);
1246         mutex_lock(&local->chanctx_mtx);
1247         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1248                                          lockdep_is_held(&local->chanctx_mtx));
1249         if (!conf) {
1250                 sdata_info(sdata,
1251                            "no channel context assigned to vif?, disconnecting\n");
1252                 goto drop_connection;
1253         }
1254
1255         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1256
1257         if (local->use_chanctx &&
1258             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1259                 sdata_info(sdata,
1260                            "driver doesn't support chan-switch with channel contexts\n");
1261                 goto drop_connection;
1262         }
1263
1264         ch_switch.timestamp = timestamp;
1265         ch_switch.device_timestamp = device_timestamp;
1266         ch_switch.block_tx = csa_ie.mode;
1267         ch_switch.chandef = csa_ie.chandef;
1268         ch_switch.count = csa_ie.count;
1269
1270         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1271                 sdata_info(sdata,
1272                            "preparing for channel switch failed, disconnecting\n");
1273                 goto drop_connection;
1274         }
1275
1276         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1277                                             chanctx->mode, false);
1278         if (res) {
1279                 sdata_info(sdata,
1280                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1281                            res);
1282                 goto drop_connection;
1283         }
1284         mutex_unlock(&local->chanctx_mtx);
1285
1286         sdata->vif.csa_active = true;
1287         sdata->csa_chandef = csa_ie.chandef;
1288         sdata->csa_block_tx = csa_ie.mode;
1289         ifmgd->csa_ignored_same_chan = false;
1290
1291         if (sdata->csa_block_tx)
1292                 ieee80211_stop_vif_queues(local, sdata,
1293                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1294         mutex_unlock(&local->mtx);
1295
1296         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1297                                           csa_ie.count);
1298
1299         if (local->ops->channel_switch) {
1300                 /* use driver's channel switch callback */
1301                 drv_channel_switch(local, sdata, &ch_switch);
1302                 return;
1303         }
1304
1305         /* channel switch handled in software */
1306         if (csa_ie.count <= 1)
1307                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1308         else
1309                 mod_timer(&ifmgd->chswitch_timer,
1310                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1311                                          cbss->beacon_interval));
1312         return;
1313  drop_connection:
1314         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1315         mutex_unlock(&local->chanctx_mtx);
1316         mutex_unlock(&local->mtx);
1317 }
1318
1319 static bool
1320 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1321                                  struct ieee80211_channel *channel,
1322                                  const u8 *country_ie, u8 country_ie_len,
1323                                  const u8 *pwr_constr_elem,
1324                                  int *chan_pwr, int *pwr_reduction)
1325 {
1326         struct ieee80211_country_ie_triplet *triplet;
1327         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1328         int i, chan_increment;
1329         bool have_chan_pwr = false;
1330
1331         /* Invalid IE */
1332         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1333                 return false;
1334
1335         triplet = (void *)(country_ie + 3);
1336         country_ie_len -= 3;
1337
1338         switch (channel->band) {
1339         default:
1340                 WARN_ON_ONCE(1);
1341                 /* fall through */
1342         case IEEE80211_BAND_2GHZ:
1343         case IEEE80211_BAND_60GHZ:
1344                 chan_increment = 1;
1345                 break;
1346         case IEEE80211_BAND_5GHZ:
1347                 chan_increment = 4;
1348                 break;
1349         }
1350
1351         /* find channel */
1352         while (country_ie_len >= 3) {
1353                 u8 first_channel = triplet->chans.first_channel;
1354
1355                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1356                         goto next;
1357
1358                 for (i = 0; i < triplet->chans.num_channels; i++) {
1359                         if (first_channel + i * chan_increment == chan) {
1360                                 have_chan_pwr = true;
1361                                 *chan_pwr = triplet->chans.max_power;
1362                                 break;
1363                         }
1364                 }
1365                 if (have_chan_pwr)
1366                         break;
1367
1368  next:
1369                 triplet++;
1370                 country_ie_len -= 3;
1371         }
1372
1373         if (have_chan_pwr && pwr_constr_elem)
1374                 *pwr_reduction = *pwr_constr_elem;
1375         else
1376                 *pwr_reduction = 0;
1377
1378         return have_chan_pwr;
1379 }
1380
1381 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1382                                       struct ieee80211_channel *channel,
1383                                       const u8 *cisco_dtpc_ie,
1384                                       int *pwr_level)
1385 {
1386         /* From practical testing, the first data byte of the DTPC element
1387          * seems to contain the requested dBm level, and the CLI on Cisco
1388          * APs clearly state the range is -127 to 127 dBm, which indicates
1389          * a signed byte, although it seemingly never actually goes negative.
1390          * The other byte seems to always be zero.
1391          */
1392         *pwr_level = (__s8)cisco_dtpc_ie[4];
1393 }
1394
1395 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1396                                        struct ieee80211_channel *channel,
1397                                        struct ieee80211_mgmt *mgmt,
1398                                        const u8 *country_ie, u8 country_ie_len,
1399                                        const u8 *pwr_constr_ie,
1400                                        const u8 *cisco_dtpc_ie)
1401 {
1402         bool has_80211h_pwr = false, has_cisco_pwr = false;
1403         int chan_pwr = 0, pwr_reduction_80211h = 0;
1404         int pwr_level_cisco, pwr_level_80211h;
1405         int new_ap_level;
1406         __le16 capab = mgmt->u.probe_resp.capab_info;
1407
1408         if (country_ie &&
1409             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1410              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1411                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1412                         sdata, channel, country_ie, country_ie_len,
1413                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1414                 pwr_level_80211h =
1415                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1416         }
1417
1418         if (cisco_dtpc_ie) {
1419                 ieee80211_find_cisco_dtpc(
1420                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1421                 has_cisco_pwr = true;
1422         }
1423
1424         if (!has_80211h_pwr && !has_cisco_pwr)
1425                 return 0;
1426
1427         /* If we have both 802.11h and Cisco DTPC, apply both limits
1428          * by picking the smallest of the two power levels advertised.
1429          */
1430         if (has_80211h_pwr &&
1431             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1432                 new_ap_level = pwr_level_80211h;
1433
1434                 if (sdata->ap_power_level == new_ap_level)
1435                         return 0;
1436
1437                 sdata_dbg(sdata,
1438                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1439                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1440                           sdata->u.mgd.bssid);
1441         } else {  /* has_cisco_pwr is always true here. */
1442                 new_ap_level = pwr_level_cisco;
1443
1444                 if (sdata->ap_power_level == new_ap_level)
1445                         return 0;
1446
1447                 sdata_dbg(sdata,
1448                           "Limiting TX power to %d dBm as advertised by %pM\n",
1449                           pwr_level_cisco, sdata->u.mgd.bssid);
1450         }
1451
1452         sdata->ap_power_level = new_ap_level;
1453         if (__ieee80211_recalc_txpower(sdata))
1454                 return BSS_CHANGED_TXPOWER;
1455         return 0;
1456 }
1457
1458 /* powersave */
1459 static void ieee80211_enable_ps(struct ieee80211_local *local,
1460                                 struct ieee80211_sub_if_data *sdata)
1461 {
1462         struct ieee80211_conf *conf = &local->hw.conf;
1463
1464         /*
1465          * If we are scanning right now then the parameters will
1466          * take effect when scan finishes.
1467          */
1468         if (local->scanning)
1469                 return;
1470
1471         if (conf->dynamic_ps_timeout > 0 &&
1472             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1473                 mod_timer(&local->dynamic_ps_timer, jiffies +
1474                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1475         } else {
1476                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1477                         ieee80211_send_nullfunc(local, sdata, true);
1478
1479                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1480                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1481                         return;
1482
1483                 conf->flags |= IEEE80211_CONF_PS;
1484                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1485         }
1486 }
1487
1488 static void ieee80211_change_ps(struct ieee80211_local *local)
1489 {
1490         struct ieee80211_conf *conf = &local->hw.conf;
1491
1492         if (local->ps_sdata) {
1493                 ieee80211_enable_ps(local, local->ps_sdata);
1494         } else if (conf->flags & IEEE80211_CONF_PS) {
1495                 conf->flags &= ~IEEE80211_CONF_PS;
1496                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1497                 del_timer_sync(&local->dynamic_ps_timer);
1498                 cancel_work_sync(&local->dynamic_ps_enable_work);
1499         }
1500 }
1501
1502 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1503 {
1504         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1505         struct sta_info *sta = NULL;
1506         bool authorized = false;
1507
1508         if (!mgd->powersave)
1509                 return false;
1510
1511         if (mgd->broken_ap)
1512                 return false;
1513
1514         if (!mgd->associated)
1515                 return false;
1516
1517         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1518                 return false;
1519
1520         if (!mgd->have_beacon)
1521                 return false;
1522
1523         rcu_read_lock();
1524         sta = sta_info_get(sdata, mgd->bssid);
1525         if (sta)
1526                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1527         rcu_read_unlock();
1528
1529         return authorized;
1530 }
1531
1532 /* need to hold RTNL or interface lock */
1533 void ieee80211_recalc_ps(struct ieee80211_local *local)
1534 {
1535         struct ieee80211_sub_if_data *sdata, *found = NULL;
1536         int count = 0;
1537         int timeout;
1538
1539         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1540                 local->ps_sdata = NULL;
1541                 return;
1542         }
1543
1544         list_for_each_entry(sdata, &local->interfaces, list) {
1545                 if (!ieee80211_sdata_running(sdata))
1546                         continue;
1547                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1548                         /* If an AP vif is found, then disable PS
1549                          * by setting the count to zero thereby setting
1550                          * ps_sdata to NULL.
1551                          */
1552                         count = 0;
1553                         break;
1554                 }
1555                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1556                         continue;
1557                 found = sdata;
1558                 count++;
1559         }
1560
1561         if (count == 1 && ieee80211_powersave_allowed(found)) {
1562                 u8 dtimper = found->u.mgd.dtim_period;
1563                 s32 beaconint_us;
1564
1565                 beaconint_us = ieee80211_tu_to_usec(
1566                                         found->vif.bss_conf.beacon_int);
1567
1568                 timeout = local->dynamic_ps_forced_timeout;
1569                 if (timeout < 0)
1570                         timeout = 100;
1571                 local->hw.conf.dynamic_ps_timeout = timeout;
1572
1573                 /* If the TIM IE is invalid, pretend the value is 1 */
1574                 if (!dtimper)
1575                         dtimper = 1;
1576
1577                 local->hw.conf.ps_dtim_period = dtimper;
1578                 local->ps_sdata = found;
1579         } else {
1580                 local->ps_sdata = NULL;
1581         }
1582
1583         ieee80211_change_ps(local);
1584 }
1585
1586 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1587 {
1588         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1589
1590         if (sdata->vif.bss_conf.ps != ps_allowed) {
1591                 sdata->vif.bss_conf.ps = ps_allowed;
1592                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1593         }
1594 }
1595
1596 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1597 {
1598         struct ieee80211_local *local =
1599                 container_of(work, struct ieee80211_local,
1600                              dynamic_ps_disable_work);
1601
1602         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1603                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1604                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1605         }
1606
1607         ieee80211_wake_queues_by_reason(&local->hw,
1608                                         IEEE80211_MAX_QUEUE_MAP,
1609                                         IEEE80211_QUEUE_STOP_REASON_PS,
1610                                         false);
1611 }
1612
1613 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1614 {
1615         struct ieee80211_local *local =
1616                 container_of(work, struct ieee80211_local,
1617                              dynamic_ps_enable_work);
1618         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1619         struct ieee80211_if_managed *ifmgd;
1620         unsigned long flags;
1621         int q;
1622
1623         /* can only happen when PS was just disabled anyway */
1624         if (!sdata)
1625                 return;
1626
1627         ifmgd = &sdata->u.mgd;
1628
1629         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1630                 return;
1631
1632         if (local->hw.conf.dynamic_ps_timeout > 0) {
1633                 /* don't enter PS if TX frames are pending */
1634                 if (drv_tx_frames_pending(local)) {
1635                         mod_timer(&local->dynamic_ps_timer, jiffies +
1636                                   msecs_to_jiffies(
1637                                   local->hw.conf.dynamic_ps_timeout));
1638                         return;
1639                 }
1640
1641                 /*
1642                  * transmission can be stopped by others which leads to
1643                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1644                  * is not the actual idle state.
1645                  */
1646                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1647                 for (q = 0; q < local->hw.queues; q++) {
1648                         if (local->queue_stop_reasons[q]) {
1649                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1650                                                        flags);
1651                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1652                                           msecs_to_jiffies(
1653                                           local->hw.conf.dynamic_ps_timeout));
1654                                 return;
1655                         }
1656                 }
1657                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1658         }
1659
1660         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1661             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1662                 if (drv_tx_frames_pending(local)) {
1663                         mod_timer(&local->dynamic_ps_timer, jiffies +
1664                                   msecs_to_jiffies(
1665                                   local->hw.conf.dynamic_ps_timeout));
1666                 } else {
1667                         ieee80211_send_nullfunc(local, sdata, true);
1668                         /* Flush to get the tx status of nullfunc frame */
1669                         ieee80211_flush_queues(local, sdata, false);
1670                 }
1671         }
1672
1673         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1674               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1675             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1676                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1677                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1678                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1679         }
1680 }
1681
1682 void ieee80211_dynamic_ps_timer(unsigned long data)
1683 {
1684         struct ieee80211_local *local = (void *) data;
1685
1686         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1687 }
1688
1689 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1690 {
1691         struct delayed_work *delayed_work =
1692                 container_of(work, struct delayed_work, work);
1693         struct ieee80211_sub_if_data *sdata =
1694                 container_of(delayed_work, struct ieee80211_sub_if_data,
1695                              dfs_cac_timer_work);
1696         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1697
1698         mutex_lock(&sdata->local->mtx);
1699         if (sdata->wdev.cac_started) {
1700                 ieee80211_vif_release_channel(sdata);
1701                 cfg80211_cac_event(sdata->dev, &chandef,
1702                                    NL80211_RADAR_CAC_FINISHED,
1703                                    GFP_KERNEL);
1704         }
1705         mutex_unlock(&sdata->local->mtx);
1706 }
1707
1708 static bool
1709 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1710 {
1711         struct ieee80211_local *local = sdata->local;
1712         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1713         bool ret = false;
1714         int ac;
1715
1716         if (local->hw.queues < IEEE80211_NUM_ACS)
1717                 return false;
1718
1719         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1720                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1721                 int non_acm_ac;
1722                 unsigned long now = jiffies;
1723
1724                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1725                     tx_tspec->admitted_time &&
1726                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1727                         tx_tspec->consumed_tx_time = 0;
1728                         tx_tspec->time_slice_start = now;
1729
1730                         if (tx_tspec->downgraded)
1731                                 tx_tspec->action =
1732                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1733                 }
1734
1735                 switch (tx_tspec->action) {
1736                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1737                         /* take the original parameters */
1738                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1739                                 sdata_err(sdata,
1740                                           "failed to set TX queue parameters for queue %d\n",
1741                                           ac);
1742                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1743                         tx_tspec->downgraded = false;
1744                         ret = true;
1745                         break;
1746                 case TX_TSPEC_ACTION_DOWNGRADE:
1747                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1748                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1749                                 ret = true;
1750                                 break;
1751                         }
1752                         /* downgrade next lower non-ACM AC */
1753                         for (non_acm_ac = ac + 1;
1754                              non_acm_ac < IEEE80211_NUM_ACS;
1755                              non_acm_ac++)
1756                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1757                                         break;
1758                         /* The loop will result in using BK even if it requires
1759                          * admission control, such configuration makes no sense
1760                          * and we have to transmit somehow - the AC selection
1761                          * does the same thing.
1762                          */
1763                         if (drv_conf_tx(local, sdata, ac,
1764                                         &sdata->tx_conf[non_acm_ac]))
1765                                 sdata_err(sdata,
1766                                           "failed to set TX queue parameters for queue %d\n",
1767                                           ac);
1768                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1769                         ret = true;
1770                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1771                                 tx_tspec->time_slice_start + HZ - now + 1);
1772                         break;
1773                 case TX_TSPEC_ACTION_NONE:
1774                         /* nothing now */
1775                         break;
1776                 }
1777         }
1778
1779         return ret;
1780 }
1781
1782 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1783 {
1784         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1785                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1786 }
1787
1788 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1789 {
1790         struct ieee80211_sub_if_data *sdata;
1791
1792         sdata = container_of(work, struct ieee80211_sub_if_data,
1793                              u.mgd.tx_tspec_wk.work);
1794         ieee80211_sta_handle_tspec_ac_params(sdata);
1795 }
1796
1797 /* MLME */
1798 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1799                                      struct ieee80211_sub_if_data *sdata,
1800                                      const u8 *wmm_param, size_t wmm_param_len)
1801 {
1802         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1803         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1804         size_t left;
1805         int count, ac;
1806         const u8 *pos;
1807         u8 uapsd_queues = 0;
1808
1809         if (!local->ops->conf_tx)
1810                 return false;
1811
1812         if (local->hw.queues < IEEE80211_NUM_ACS)
1813                 return false;
1814
1815         if (!wmm_param)
1816                 return false;
1817
1818         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1819                 return false;
1820
1821         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1822                 uapsd_queues = ifmgd->uapsd_queues;
1823
1824         count = wmm_param[6] & 0x0f;
1825         if (count == ifmgd->wmm_last_param_set)
1826                 return false;
1827         ifmgd->wmm_last_param_set = count;
1828
1829         pos = wmm_param + 8;
1830         left = wmm_param_len - 8;
1831
1832         memset(&params, 0, sizeof(params));
1833
1834         sdata->wmm_acm = 0;
1835         for (; left >= 4; left -= 4, pos += 4) {
1836                 int aci = (pos[0] >> 5) & 0x03;
1837                 int acm = (pos[0] >> 4) & 0x01;
1838                 bool uapsd = false;
1839
1840                 switch (aci) {
1841                 case 1: /* AC_BK */
1842                         ac = IEEE80211_AC_BK;
1843                         if (acm)
1844                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1845                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1846                                 uapsd = true;
1847                         break;
1848                 case 2: /* AC_VI */
1849                         ac = IEEE80211_AC_VI;
1850                         if (acm)
1851                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1852                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1853                                 uapsd = true;
1854                         break;
1855                 case 3: /* AC_VO */
1856                         ac = IEEE80211_AC_VO;
1857                         if (acm)
1858                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1859                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1860                                 uapsd = true;
1861                         break;
1862                 case 0: /* AC_BE */
1863                 default:
1864                         ac = IEEE80211_AC_BE;
1865                         if (acm)
1866                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1867                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1868                                 uapsd = true;
1869                         break;
1870                 }
1871
1872                 params[ac].aifs = pos[0] & 0x0f;
1873
1874                 if (params[ac].aifs < 2) {
1875                         sdata_info(sdata,
1876                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1877                                    params[ac].aifs, aci);
1878                         params[ac].aifs = 2;
1879                 }
1880                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1881                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1882                 params[ac].txop = get_unaligned_le16(pos + 2);
1883                 params[ac].acm = acm;
1884                 params[ac].uapsd = uapsd;
1885
1886                 if (params[ac].cw_min == 0 ||
1887                     params[ac].cw_min > params[ac].cw_max) {
1888                         sdata_info(sdata,
1889                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1890                                    params[ac].cw_min, params[ac].cw_max, aci);
1891                         return false;
1892                 }
1893         }
1894
1895         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1896                 mlme_dbg(sdata,
1897                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1898                          ac, params[ac].acm,
1899                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1900                          params[ac].txop, params[ac].uapsd,
1901                          ifmgd->tx_tspec[ac].downgraded);
1902                 sdata->tx_conf[ac] = params[ac];
1903                 if (!ifmgd->tx_tspec[ac].downgraded &&
1904                     drv_conf_tx(local, sdata, ac, &params[ac]))
1905                         sdata_err(sdata,
1906                                   "failed to set TX queue parameters for AC %d\n",
1907                                   ac);
1908         }
1909
1910         /* enable WMM or activate new settings */
1911         sdata->vif.bss_conf.qos = true;
1912         return true;
1913 }
1914
1915 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1916 {
1917         lockdep_assert_held(&sdata->local->mtx);
1918
1919         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1920         ieee80211_run_deferred_scan(sdata->local);
1921 }
1922
1923 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1924 {
1925         mutex_lock(&sdata->local->mtx);
1926         __ieee80211_stop_poll(sdata);
1927         mutex_unlock(&sdata->local->mtx);
1928 }
1929
1930 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1931                                            u16 capab, bool erp_valid, u8 erp)
1932 {
1933         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1934         u32 changed = 0;
1935         bool use_protection;
1936         bool use_short_preamble;
1937         bool use_short_slot;
1938
1939         if (erp_valid) {
1940                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1941                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1942         } else {
1943                 use_protection = false;
1944                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1945         }
1946
1947         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1948         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1949                 use_short_slot = true;
1950
1951         if (use_protection != bss_conf->use_cts_prot) {
1952                 bss_conf->use_cts_prot = use_protection;
1953                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1954         }
1955
1956         if (use_short_preamble != bss_conf->use_short_preamble) {
1957                 bss_conf->use_short_preamble = use_short_preamble;
1958                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1959         }
1960
1961         if (use_short_slot != bss_conf->use_short_slot) {
1962                 bss_conf->use_short_slot = use_short_slot;
1963                 changed |= BSS_CHANGED_ERP_SLOT;
1964         }
1965
1966         return changed;
1967 }
1968
1969 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1970                                      struct cfg80211_bss *cbss,
1971                                      u32 bss_info_changed)
1972 {
1973         struct ieee80211_bss *bss = (void *)cbss->priv;
1974         struct ieee80211_local *local = sdata->local;
1975         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1976
1977         bss_info_changed |= BSS_CHANGED_ASSOC;
1978         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1979                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1980
1981         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1982                 beacon_loss_count * bss_conf->beacon_int));
1983
1984         sdata->u.mgd.associated = cbss;
1985         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1986
1987         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1988
1989         if (sdata->vif.p2p) {
1990                 const struct cfg80211_bss_ies *ies;
1991
1992                 rcu_read_lock();
1993                 ies = rcu_dereference(cbss->ies);
1994                 if (ies) {
1995                         int ret;
1996
1997                         ret = cfg80211_get_p2p_attr(
1998                                         ies->data, ies->len,
1999                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2000                                         (u8 *) &bss_conf->p2p_noa_attr,
2001                                         sizeof(bss_conf->p2p_noa_attr));
2002                         if (ret >= 2) {
2003                                 sdata->u.mgd.p2p_noa_index =
2004                                         bss_conf->p2p_noa_attr.index;
2005                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2006                         }
2007                 }
2008                 rcu_read_unlock();
2009         }
2010
2011         /* just to be sure */
2012         ieee80211_stop_poll(sdata);
2013
2014         ieee80211_led_assoc(local, 1);
2015
2016         if (sdata->u.mgd.have_beacon) {
2017                 /*
2018                  * If the AP is buggy we may get here with no DTIM period
2019                  * known, so assume it's 1 which is the only safe assumption
2020                  * in that case, although if the TIM IE is broken powersave
2021                  * probably just won't work at all.
2022                  */
2023                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2024                 bss_conf->beacon_rate = bss->beacon_rate;
2025                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2026         } else {
2027                 bss_conf->beacon_rate = NULL;
2028                 bss_conf->dtim_period = 0;
2029         }
2030
2031         bss_conf->assoc = 1;
2032
2033         /* Tell the driver to monitor connection quality (if supported) */
2034         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2035             bss_conf->cqm_rssi_thold)
2036                 bss_info_changed |= BSS_CHANGED_CQM;
2037
2038         /* Enable ARP filtering */
2039         if (bss_conf->arp_addr_cnt)
2040                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2041
2042         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2043
2044         mutex_lock(&local->iflist_mtx);
2045         ieee80211_recalc_ps(local);
2046         mutex_unlock(&local->iflist_mtx);
2047
2048         ieee80211_recalc_smps(sdata);
2049         ieee80211_recalc_ps_vif(sdata);
2050
2051         netif_carrier_on(sdata->dev);
2052 }
2053
2054 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2055                                    u16 stype, u16 reason, bool tx,
2056                                    u8 *frame_buf)
2057 {
2058         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2059         struct ieee80211_local *local = sdata->local;
2060         u32 changed = 0;
2061
2062         sdata_assert_lock(sdata);
2063
2064         if (WARN_ON_ONCE(tx && !frame_buf))
2065                 return;
2066
2067         if (WARN_ON(!ifmgd->associated))
2068                 return;
2069
2070         ieee80211_stop_poll(sdata);
2071
2072         ifmgd->associated = NULL;
2073         netif_carrier_off(sdata->dev);
2074
2075         /*
2076          * if we want to get out of ps before disassoc (why?) we have
2077          * to do it before sending disassoc, as otherwise the null-packet
2078          * won't be valid.
2079          */
2080         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2081                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2082                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2083         }
2084         local->ps_sdata = NULL;
2085
2086         /* disable per-vif ps */
2087         ieee80211_recalc_ps_vif(sdata);
2088
2089         /* make sure ongoing transmission finishes */
2090         synchronize_net();
2091
2092         /*
2093          * drop any frame before deauth/disassoc, this can be data or
2094          * management frame. Since we are disconnecting, we should not
2095          * insist sending these frames which can take time and delay
2096          * the disconnection and possible the roaming.
2097          */
2098         if (tx)
2099                 ieee80211_flush_queues(local, sdata, true);
2100
2101         /* deauthenticate/disassociate now */
2102         if (tx || frame_buf)
2103                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2104                                                reason, tx, frame_buf);
2105
2106         /* flush out frame - make sure the deauth was actually sent */
2107         if (tx)
2108                 ieee80211_flush_queues(local, sdata, false);
2109
2110         /* clear bssid only after building the needed mgmt frames */
2111         eth_zero_addr(ifmgd->bssid);
2112
2113         /* remove AP and TDLS peers */
2114         sta_info_flush(sdata);
2115
2116         /* finally reset all BSS / config parameters */
2117         changed |= ieee80211_reset_erp_info(sdata);
2118
2119         ieee80211_led_assoc(local, 0);
2120         changed |= BSS_CHANGED_ASSOC;
2121         sdata->vif.bss_conf.assoc = false;
2122
2123         ifmgd->p2p_noa_index = -1;
2124         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2125                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2126
2127         /* on the next assoc, re-program HT/VHT parameters */
2128         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2129         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2130         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2131         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2132         sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2133
2134         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2135
2136         del_timer_sync(&local->dynamic_ps_timer);
2137         cancel_work_sync(&local->dynamic_ps_enable_work);
2138
2139         /* Disable ARP filtering */
2140         if (sdata->vif.bss_conf.arp_addr_cnt)
2141                 changed |= BSS_CHANGED_ARP_FILTER;
2142
2143         sdata->vif.bss_conf.qos = false;
2144         changed |= BSS_CHANGED_QOS;
2145
2146         /* The BSSID (not really interesting) and HT changed */
2147         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2148         ieee80211_bss_info_change_notify(sdata, changed);
2149
2150         /* disassociated - set to defaults now */
2151         ieee80211_set_wmm_default(sdata, false, false);
2152
2153         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2154         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2155         del_timer_sync(&sdata->u.mgd.timer);
2156         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2157
2158         sdata->vif.bss_conf.dtim_period = 0;
2159         sdata->vif.bss_conf.beacon_rate = NULL;
2160
2161         ifmgd->have_beacon = false;
2162
2163         ifmgd->flags = 0;
2164         mutex_lock(&local->mtx);
2165         ieee80211_vif_release_channel(sdata);
2166
2167         sdata->vif.csa_active = false;
2168         ifmgd->csa_waiting_bcn = false;
2169         ifmgd->csa_ignored_same_chan = false;
2170         if (sdata->csa_block_tx) {
2171                 ieee80211_wake_vif_queues(local, sdata,
2172                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2173                 sdata->csa_block_tx = false;
2174         }
2175         mutex_unlock(&local->mtx);
2176
2177         /* existing TX TSPEC sessions no longer exist */
2178         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2179         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2180
2181         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2182 }
2183
2184 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2185                              struct ieee80211_hdr *hdr)
2186 {
2187         /*
2188          * We can postpone the mgd.timer whenever receiving unicast frames
2189          * from AP because we know that the connection is working both ways
2190          * at that time. But multicast frames (and hence also beacons) must
2191          * be ignored here, because we need to trigger the timer during
2192          * data idle periods for sending the periodic probe request to the
2193          * AP we're connected to.
2194          */
2195         if (is_multicast_ether_addr(hdr->addr1))
2196                 return;
2197
2198         ieee80211_sta_reset_conn_monitor(sdata);
2199 }
2200
2201 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2202 {
2203         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2204         struct ieee80211_local *local = sdata->local;
2205
2206         mutex_lock(&local->mtx);
2207         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2208                 goto out;
2209
2210         __ieee80211_stop_poll(sdata);
2211
2212         mutex_lock(&local->iflist_mtx);
2213         ieee80211_recalc_ps(local);
2214         mutex_unlock(&local->iflist_mtx);
2215
2216         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2217                 goto out;
2218
2219         /*
2220          * We've received a probe response, but are not sure whether
2221          * we have or will be receiving any beacons or data, so let's
2222          * schedule the timers again, just in case.
2223          */
2224         ieee80211_sta_reset_beacon_monitor(sdata);
2225
2226         mod_timer(&ifmgd->conn_mon_timer,
2227                   round_jiffies_up(jiffies +
2228                                    IEEE80211_CONNECTION_IDLE_TIME));
2229 out:
2230         mutex_unlock(&local->mtx);
2231 }
2232
2233 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2234                                            struct ieee80211_hdr *hdr,
2235                                            u16 tx_time)
2236 {
2237         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2238         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2239         int ac = ieee80211_ac_from_tid(tid);
2240         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2241         unsigned long now = jiffies;
2242
2243         if (likely(!tx_tspec->admitted_time))
2244                 return;
2245
2246         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2247                 tx_tspec->consumed_tx_time = 0;
2248                 tx_tspec->time_slice_start = now;
2249
2250                 if (tx_tspec->downgraded) {
2251                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2252                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2253                 }
2254         }
2255
2256         if (tx_tspec->downgraded)
2257                 return;
2258
2259         tx_tspec->consumed_tx_time += tx_time;
2260
2261         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2262                 tx_tspec->downgraded = true;
2263                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2264                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2265         }
2266 }
2267
2268 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2269                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2270 {
2271         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2272
2273         if (!ieee80211_is_data(hdr->frame_control))
2274             return;
2275
2276         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2277             sdata->u.mgd.probe_send_count > 0) {
2278                 if (ack)
2279                         ieee80211_sta_reset_conn_monitor(sdata);
2280                 else
2281                         sdata->u.mgd.nullfunc_failed = true;
2282                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2283                 return;
2284         }
2285
2286         if (ack)
2287                 ieee80211_sta_reset_conn_monitor(sdata);
2288 }
2289
2290 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2291 {
2292         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2293         const u8 *ssid;
2294         u8 *dst = ifmgd->associated->bssid;
2295         u8 unicast_limit = max(1, max_probe_tries - 3);
2296
2297         /*
2298          * Try sending broadcast probe requests for the last three
2299          * probe requests after the first ones failed since some
2300          * buggy APs only support broadcast probe requests.
2301          */
2302         if (ifmgd->probe_send_count >= unicast_limit)
2303                 dst = NULL;
2304
2305         /*
2306          * When the hardware reports an accurate Tx ACK status, it's
2307          * better to send a nullfunc frame instead of a probe request,
2308          * as it will kick us off the AP quickly if we aren't associated
2309          * anymore. The timeout will be reset if the frame is ACKed by
2310          * the AP.
2311          */
2312         ifmgd->probe_send_count++;
2313
2314         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2315                 ifmgd->nullfunc_failed = false;
2316                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2317         } else {
2318                 int ssid_len;
2319
2320                 rcu_read_lock();
2321                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2322                 if (WARN_ON_ONCE(ssid == NULL))
2323                         ssid_len = 0;
2324                 else
2325                         ssid_len = ssid[1];
2326
2327                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2328                                          ssid + 2, ssid_len, NULL,
2329                                          0, (u32) -1, true, 0,
2330                                          ifmgd->associated->channel, false);
2331                 rcu_read_unlock();
2332         }
2333
2334         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2335         run_again(sdata, ifmgd->probe_timeout);
2336 }
2337
2338 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2339                                    bool beacon)
2340 {
2341         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2342         bool already = false;
2343
2344         if (!ieee80211_sdata_running(sdata))
2345                 return;
2346
2347         sdata_lock(sdata);
2348
2349         if (!ifmgd->associated)
2350                 goto out;
2351
2352         mutex_lock(&sdata->local->mtx);
2353
2354         if (sdata->local->tmp_channel || sdata->local->scanning) {
2355                 mutex_unlock(&sdata->local->mtx);
2356                 goto out;
2357         }
2358
2359         if (beacon) {
2360                 mlme_dbg_ratelimited(sdata,
2361                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2362                                      beacon_loss_count);
2363
2364                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2365         }
2366
2367         /*
2368          * The driver/our work has already reported this event or the
2369          * connection monitoring has kicked in and we have already sent
2370          * a probe request. Or maybe the AP died and the driver keeps
2371          * reporting until we disassociate...
2372          *
2373          * In either case we have to ignore the current call to this
2374          * function (except for setting the correct probe reason bit)
2375          * because otherwise we would reset the timer every time and
2376          * never check whether we received a probe response!
2377          */
2378         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2379                 already = true;
2380
2381         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2382
2383         mutex_unlock(&sdata->local->mtx);
2384
2385         if (already)
2386                 goto out;
2387
2388         mutex_lock(&sdata->local->iflist_mtx);
2389         ieee80211_recalc_ps(sdata->local);
2390         mutex_unlock(&sdata->local->iflist_mtx);
2391
2392         ifmgd->probe_send_count = 0;
2393         ieee80211_mgd_probe_ap_send(sdata);
2394  out:
2395         sdata_unlock(sdata);
2396 }
2397
2398 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2399                                           struct ieee80211_vif *vif)
2400 {
2401         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2402         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2403         struct cfg80211_bss *cbss;
2404         struct sk_buff *skb;
2405         const u8 *ssid;
2406         int ssid_len;
2407
2408         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2409                 return NULL;
2410
2411         sdata_assert_lock(sdata);
2412
2413         if (ifmgd->associated)
2414                 cbss = ifmgd->associated;
2415         else if (ifmgd->auth_data)
2416                 cbss = ifmgd->auth_data->bss;
2417         else if (ifmgd->assoc_data)
2418                 cbss = ifmgd->assoc_data->bss;
2419         else
2420                 return NULL;
2421
2422         rcu_read_lock();
2423         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2424         if (WARN_ON_ONCE(ssid == NULL))
2425                 ssid_len = 0;
2426         else
2427                 ssid_len = ssid[1];
2428
2429         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2430                                         (u32) -1, cbss->channel,
2431                                         ssid + 2, ssid_len,
2432                                         NULL, 0, true);
2433         rcu_read_unlock();
2434
2435         return skb;
2436 }
2437 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2438
2439 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2440                                         const u8 *buf, size_t len, bool tx,
2441                                         u16 reason)
2442 {
2443         struct ieee80211_event event = {
2444                 .type = MLME_EVENT,
2445                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2446                 .u.mlme.reason = reason,
2447         };
2448
2449         if (tx)
2450                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2451         else
2452                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2453
2454         drv_event_callback(sdata->local, sdata, &event);
2455 }
2456
2457 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2458 {
2459         struct ieee80211_local *local = sdata->local;
2460         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2461         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2462
2463         sdata_lock(sdata);
2464         if (!ifmgd->associated) {
2465                 sdata_unlock(sdata);
2466                 return;
2467         }
2468
2469         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2470                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2471                                true, frame_buf);
2472         mutex_lock(&local->mtx);
2473         sdata->vif.csa_active = false;
2474         ifmgd->csa_waiting_bcn = false;
2475         if (sdata->csa_block_tx) {
2476                 ieee80211_wake_vif_queues(local, sdata,
2477                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2478                 sdata->csa_block_tx = false;
2479         }
2480         mutex_unlock(&local->mtx);
2481
2482         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2483                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2484
2485         sdata_unlock(sdata);
2486 }
2487
2488 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2489 {
2490         struct ieee80211_sub_if_data *sdata =
2491                 container_of(work, struct ieee80211_sub_if_data,
2492                              u.mgd.beacon_connection_loss_work);
2493         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2494
2495         if (ifmgd->associated)
2496                 ifmgd->beacon_loss_count++;
2497
2498         if (ifmgd->connection_loss) {
2499                 sdata_info(sdata, "Connection to AP %pM lost\n",
2500                            ifmgd->bssid);
2501                 __ieee80211_disconnect(sdata);
2502         } else {
2503                 ieee80211_mgd_probe_ap(sdata, true);
2504         }
2505 }
2506
2507 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2508 {
2509         struct ieee80211_sub_if_data *sdata =
2510                 container_of(work, struct ieee80211_sub_if_data,
2511                              u.mgd.csa_connection_drop_work);
2512
2513         __ieee80211_disconnect(sdata);
2514 }
2515
2516 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2517 {
2518         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2519         struct ieee80211_hw *hw = &sdata->local->hw;
2520
2521         trace_api_beacon_loss(sdata);
2522
2523         sdata->u.mgd.connection_loss = false;
2524         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2525 }
2526 EXPORT_SYMBOL(ieee80211_beacon_loss);
2527
2528 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2529 {
2530         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2531         struct ieee80211_hw *hw = &sdata->local->hw;
2532
2533         trace_api_connection_loss(sdata);
2534
2535         sdata->u.mgd.connection_loss = true;
2536         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2537 }
2538 EXPORT_SYMBOL(ieee80211_connection_loss);
2539
2540
2541 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2542                                         bool assoc)
2543 {
2544         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2545
2546         sdata_assert_lock(sdata);
2547
2548         if (!assoc) {
2549                 /*
2550                  * we are not authenticated yet, the only timer that could be
2551                  * running is the timeout for the authentication response which
2552                  * which is not relevant anymore.
2553                  */
2554                 del_timer_sync(&sdata->u.mgd.timer);
2555                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2556
2557                 eth_zero_addr(sdata->u.mgd.bssid);
2558                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2559                 sdata->u.mgd.flags = 0;
2560                 mutex_lock(&sdata->local->mtx);
2561                 ieee80211_vif_release_channel(sdata);
2562                 mutex_unlock(&sdata->local->mtx);
2563         }
2564
2565         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2566         kfree(auth_data);
2567         sdata->u.mgd.auth_data = NULL;
2568 }
2569
2570 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2571                                          bool assoc, bool abandon)
2572 {
2573         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2574
2575         sdata_assert_lock(sdata);
2576
2577         if (!assoc) {
2578                 /*
2579                  * we are not associated yet, the only timer that could be
2580                  * running is the timeout for the association response which
2581                  * which is not relevant anymore.
2582                  */
2583                 del_timer_sync(&sdata->u.mgd.timer);
2584                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2585
2586                 eth_zero_addr(sdata->u.mgd.bssid);
2587                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2588                 sdata->u.mgd.flags = 0;
2589                 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2590                 mutex_lock(&sdata->local->mtx);
2591                 ieee80211_vif_release_channel(sdata);
2592                 mutex_unlock(&sdata->local->mtx);
2593
2594                 if (abandon)
2595                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2596         }
2597
2598         kfree(assoc_data);
2599         sdata->u.mgd.assoc_data = NULL;
2600 }
2601
2602 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2603                                      struct ieee80211_mgmt *mgmt, size_t len)
2604 {
2605         struct ieee80211_local *local = sdata->local;
2606         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2607         u8 *pos;
2608         struct ieee802_11_elems elems;
2609         u32 tx_flags = 0;
2610
2611         pos = mgmt->u.auth.variable;
2612         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2613         if (!elems.challenge)
2614                 return;
2615         auth_data->expected_transaction = 4;
2616         drv_mgd_prepare_tx(sdata->local, sdata);
2617         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2618                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2619                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2620         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2621                             elems.challenge - 2, elems.challenge_len + 2,
2622                             auth_data->bss->bssid, auth_data->bss->bssid,
2623                             auth_data->key, auth_data->key_len,
2624                             auth_data->key_idx, tx_flags);
2625 }
2626
2627 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2628                                    struct ieee80211_mgmt *mgmt, size_t len)
2629 {
2630         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2631         u8 bssid[ETH_ALEN];
2632         u16 auth_alg, auth_transaction, status_code;
2633         struct sta_info *sta;
2634         struct ieee80211_event event = {
2635                 .type = MLME_EVENT,
2636                 .u.mlme.data = AUTH_EVENT,
2637         };
2638
2639         sdata_assert_lock(sdata);
2640
2641         if (len < 24 + 6)
2642                 return;
2643
2644         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2645                 return;
2646
2647         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2648
2649         if (!ether_addr_equal(bssid, mgmt->bssid))
2650                 return;
2651
2652         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2653         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2654         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2655
2656         if (auth_alg != ifmgd->auth_data->algorithm ||
2657             auth_transaction != ifmgd->auth_data->expected_transaction) {
2658                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2659                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2660                            auth_transaction,
2661                            ifmgd->auth_data->expected_transaction);
2662                 return;
2663         }
2664
2665         if (status_code != WLAN_STATUS_SUCCESS) {
2666                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2667                            mgmt->sa, status_code);
2668                 ieee80211_destroy_auth_data(sdata, false);
2669                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2670                 event.u.mlme.status = MLME_DENIED;
2671                 event.u.mlme.reason = status_code;
2672                 drv_event_callback(sdata->local, sdata, &event);
2673                 return;
2674         }
2675
2676         switch (ifmgd->auth_data->algorithm) {
2677         case WLAN_AUTH_OPEN:
2678         case WLAN_AUTH_LEAP:
2679         case WLAN_AUTH_FT:
2680         case WLAN_AUTH_SAE:
2681                 break;
2682         case WLAN_AUTH_SHARED_KEY:
2683                 if (ifmgd->auth_data->expected_transaction != 4) {
2684                         ieee80211_auth_challenge(sdata, mgmt, len);
2685                         /* need another frame */
2686                         return;
2687                 }
2688                 break;
2689         default:
2690                 WARN_ONCE(1, "invalid auth alg %d",
2691                           ifmgd->auth_data->algorithm);
2692                 return;
2693         }
2694
2695         event.u.mlme.status = MLME_SUCCESS;
2696         drv_event_callback(sdata->local, sdata, &event);
2697         sdata_info(sdata, "authenticated\n");
2698         ifmgd->auth_data->done = true;
2699         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2700         ifmgd->auth_data->timeout_started = true;
2701         run_again(sdata, ifmgd->auth_data->timeout);
2702
2703         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2704             ifmgd->auth_data->expected_transaction != 2) {
2705                 /*
2706                  * Report auth frame to user space for processing since another
2707                  * round of Authentication frames is still needed.
2708                  */
2709                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2710                 return;
2711         }
2712
2713         /* move station state to auth */
2714         mutex_lock(&sdata->local->sta_mtx);
2715         sta = sta_info_get(sdata, bssid);
2716         if (!sta) {
2717                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2718                 goto out_err;
2719         }
2720         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2721                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2722                 goto out_err;
2723         }
2724         mutex_unlock(&sdata->local->sta_mtx);
2725
2726         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2727         return;
2728  out_err:
2729         mutex_unlock(&sdata->local->sta_mtx);
2730         /* ignore frame -- wait for timeout */
2731 }
2732
2733 #define case_WLAN(type) \
2734         case WLAN_REASON_##type: return #type
2735
2736 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2737 {
2738         switch (reason_code) {
2739         case_WLAN(UNSPECIFIED);
2740         case_WLAN(PREV_AUTH_NOT_VALID);
2741         case_WLAN(DEAUTH_LEAVING);
2742         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2743         case_WLAN(DISASSOC_AP_BUSY);
2744         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2745         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2746         case_WLAN(DISASSOC_STA_HAS_LEFT);
2747         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2748         case_WLAN(DISASSOC_BAD_POWER);
2749         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2750         case_WLAN(INVALID_IE);
2751         case_WLAN(MIC_FAILURE);
2752         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2753         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2754         case_WLAN(IE_DIFFERENT);
2755         case_WLAN(INVALID_GROUP_CIPHER);
2756         case_WLAN(INVALID_PAIRWISE_CIPHER);
2757         case_WLAN(INVALID_AKMP);
2758         case_WLAN(UNSUPP_RSN_VERSION);
2759         case_WLAN(INVALID_RSN_IE_CAP);
2760         case_WLAN(IEEE8021X_FAILED);
2761         case_WLAN(CIPHER_SUITE_REJECTED);
2762         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2763         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2764         case_WLAN(DISASSOC_LOW_ACK);
2765         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2766         case_WLAN(QSTA_LEAVE_QBSS);
2767         case_WLAN(QSTA_NOT_USE);
2768         case_WLAN(QSTA_REQUIRE_SETUP);
2769         case_WLAN(QSTA_TIMEOUT);
2770         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2771         case_WLAN(MESH_PEER_CANCELED);
2772         case_WLAN(MESH_MAX_PEERS);
2773         case_WLAN(MESH_CONFIG);
2774         case_WLAN(MESH_CLOSE);
2775         case_WLAN(MESH_MAX_RETRIES);
2776         case_WLAN(MESH_CONFIRM_TIMEOUT);
2777         case_WLAN(MESH_INVALID_GTK);
2778         case_WLAN(MESH_INCONSISTENT_PARAM);
2779         case_WLAN(MESH_INVALID_SECURITY);
2780         case_WLAN(MESH_PATH_ERROR);
2781         case_WLAN(MESH_PATH_NOFORWARD);
2782         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2783         case_WLAN(MAC_EXISTS_IN_MBSS);
2784         case_WLAN(MESH_CHAN_REGULATORY);
2785         case_WLAN(MESH_CHAN);
2786         default: return "<unknown>";
2787         }
2788 }
2789
2790 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2791                                      struct ieee80211_mgmt *mgmt, size_t len)
2792 {
2793         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2794         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2795
2796         sdata_assert_lock(sdata);
2797
2798         if (len < 24 + 2)
2799                 return;
2800
2801         if (ifmgd->associated &&
2802             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2803                 const u8 *bssid = ifmgd->associated->bssid;
2804
2805                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2806                            bssid, reason_code,
2807                            ieee80211_get_reason_code_string(reason_code));
2808
2809                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2810
2811                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2812                                             reason_code);
2813                 return;
2814         }
2815
2816         if (ifmgd->assoc_data &&
2817             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2818                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2819
2820                 sdata_info(sdata,
2821                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2822                            bssid, reason_code,
2823                            ieee80211_get_reason_code_string(reason_code));
2824
2825                 ieee80211_destroy_assoc_data(sdata, false, true);
2826
2827                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2828                 return;
2829         }
2830 }
2831
2832
2833 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2834                                        struct ieee80211_mgmt *mgmt, size_t len)
2835 {
2836         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2837         u16 reason_code;
2838
2839         sdata_assert_lock(sdata);
2840
2841         if (len < 24 + 2)
2842                 return;
2843
2844         if (!ifmgd->associated ||
2845             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2846                 return;
2847
2848         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2849
2850         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2851                    mgmt->sa, reason_code);
2852
2853         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2854
2855         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2856 }
2857
2858 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2859                                 u8 *supp_rates, unsigned int supp_rates_len,
2860                                 u32 *rates, u32 *basic_rates,
2861                                 bool *have_higher_than_11mbit,
2862                                 int *min_rate, int *min_rate_index,
2863                                 int shift, u32 rate_flags)
2864 {
2865         int i, j;
2866
2867         for (i = 0; i < supp_rates_len; i++) {
2868                 int rate = supp_rates[i] & 0x7f;
2869                 bool is_basic = !!(supp_rates[i] & 0x80);
2870
2871                 if ((rate * 5 * (1 << shift)) > 110)
2872                         *have_higher_than_11mbit = true;
2873
2874                 /*
2875                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2876                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2877                  *
2878                  * Note: Even through the membership selector and the basic
2879                  *       rate flag share the same bit, they are not exactly
2880                  *       the same.
2881                  */
2882                 if (!!(supp_rates[i] & 0x80) &&
2883                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2884                         continue;
2885
2886                 for (j = 0; j < sband->n_bitrates; j++) {
2887                         struct ieee80211_rate *br;
2888                         int brate;
2889
2890                         br = &sband->bitrates[j];
2891                         if ((rate_flags & br->flags) != rate_flags)
2892                                 continue;
2893
2894                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2895                         if (brate == rate) {
2896                                 *rates |= BIT(j);
2897                                 if (is_basic)
2898                                         *basic_rates |= BIT(j);
2899                                 if ((rate * 5) < *min_rate) {
2900                                         *min_rate = rate * 5;
2901                                         *min_rate_index = j;
2902                                 }
2903                                 break;
2904                         }
2905                 }
2906         }
2907 }
2908
2909 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2910                                     struct cfg80211_bss *cbss,
2911                                     struct ieee80211_mgmt *mgmt, size_t len)
2912 {
2913         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2914         struct ieee80211_local *local = sdata->local;
2915         struct ieee80211_supported_band *sband;
2916         struct sta_info *sta;
2917         u8 *pos;
2918         u16 capab_info, aid;
2919         struct ieee802_11_elems elems;
2920         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2921         const struct cfg80211_bss_ies *bss_ies = NULL;
2922         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2923         u32 changed = 0;
2924         int err;
2925         bool ret;
2926
2927         /* AssocResp and ReassocResp have identical structure */
2928
2929         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2930         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2931
2932         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2933                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2934                            aid);
2935         aid &= ~(BIT(15) | BIT(14));
2936
2937         ifmgd->broken_ap = false;
2938
2939         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2940                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2941                            aid);
2942                 aid = 0;
2943                 ifmgd->broken_ap = true;
2944         }
2945
2946         pos = mgmt->u.assoc_resp.variable;
2947         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2948
2949         if (!elems.supp_rates) {
2950                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2951                 return false;
2952         }
2953
2954         ifmgd->aid = aid;
2955         ifmgd->tdls_chan_switch_prohibited =
2956                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2957                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2958
2959         /*
2960          * Some APs are erroneously not including some information in their
2961          * (re)association response frames. Try to recover by using the data
2962          * from the beacon or probe response. This seems to afflict mobile
2963          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2964          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2965          */
2966         if ((assoc_data->wmm && !elems.wmm_param) ||
2967             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2968              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2969             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2970              (!elems.vht_cap_elem || !elems.vht_operation))) {
2971                 const struct cfg80211_bss_ies *ies;
2972                 struct ieee802_11_elems bss_elems;
2973
2974                 rcu_read_lock();
2975                 ies = rcu_dereference(cbss->ies);
2976                 if (ies)
2977                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2978                                           GFP_ATOMIC);
2979                 rcu_read_unlock();
2980                 if (!bss_ies)
2981                         return false;
2982
2983                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2984                                        false, &bss_elems);
2985                 if (assoc_data->wmm &&
2986                     !elems.wmm_param && bss_elems.wmm_param) {
2987                         elems.wmm_param = bss_elems.wmm_param;
2988                         sdata_info(sdata,
2989                                    "AP bug: WMM param missing from AssocResp\n");
2990                 }
2991
2992                 /*
2993                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2994                  * have to include the IEs in the (re)association response.
2995                  */
2996                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2997                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2998                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2999                         sdata_info(sdata,
3000                                    "AP bug: HT capability missing from AssocResp\n");
3001                 }
3002                 if (!elems.ht_operation && bss_elems.ht_operation &&
3003                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3004                         elems.ht_operation = bss_elems.ht_operation;
3005                         sdata_info(sdata,
3006                                    "AP bug: HT operation missing from AssocResp\n");
3007                 }
3008                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3009                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3010                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
3011                         sdata_info(sdata,
3012                                    "AP bug: VHT capa missing from AssocResp\n");
3013                 }
3014                 if (!elems.vht_operation && bss_elems.vht_operation &&
3015                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3016                         elems.vht_operation = bss_elems.vht_operation;
3017                         sdata_info(sdata,
3018                                    "AP bug: VHT operation missing from AssocResp\n");
3019                 }
3020         }
3021
3022         /*
3023          * We previously checked these in the beacon/probe response, so
3024          * they should be present here. This is just a safety net.
3025          */
3026         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3027             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3028                 sdata_info(sdata,
3029                            "HT AP is missing WMM params or HT capability/operation\n");
3030                 ret = false;
3031                 goto out;
3032         }
3033
3034         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3035             (!elems.vht_cap_elem || !elems.vht_operation)) {
3036                 sdata_info(sdata,
3037                            "VHT AP is missing VHT capability/operation\n");
3038                 ret = false;
3039                 goto out;
3040         }
3041
3042         mutex_lock(&sdata->local->sta_mtx);
3043         /*
3044          * station info was already allocated and inserted before
3045          * the association and should be available to us
3046          */
3047         sta = sta_info_get(sdata, cbss->bssid);
3048         if (WARN_ON(!sta)) {
3049                 mutex_unlock(&sdata->local->sta_mtx);
3050                 ret = false;
3051                 goto out;
3052         }
3053
3054         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3055
3056         /* Set up internal HT/VHT capabilities */
3057         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3058                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3059                                                   elems.ht_cap_elem, sta);
3060
3061         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3062                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3063                                                     elems.vht_cap_elem, sta);
3064
3065         /*
3066          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3067          * in their association response, so ignore that data for our own
3068          * configuration. If it changed since the last beacon, we'll get the
3069          * next beacon and update then.
3070          */
3071
3072         /*
3073          * If an operating mode notification IE is present, override the
3074          * NSS calculation (that would be done in rate_control_rate_init())
3075          * and use the # of streams from that element.
3076          */
3077         if (elems.opmode_notif &&
3078             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3079                 u8 nss;
3080
3081                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3082                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3083                 nss += 1;
3084                 sta->sta.rx_nss = nss;
3085         }
3086
3087         rate_control_rate_init(sta);
3088
3089         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3090                 set_sta_flag(sta, WLAN_STA_MFP);
3091                 sta->sta.mfp = true;
3092         } else {
3093                 sta->sta.mfp = false;
3094         }
3095
3096         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3097
3098         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3099         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3100                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3101         if (err) {
3102                 sdata_info(sdata,
3103                            "failed to move station %pM to desired state\n",
3104                            sta->sta.addr);
3105                 WARN_ON(__sta_info_destroy(sta));
3106                 mutex_unlock(&sdata->local->sta_mtx);
3107                 ret = false;
3108                 goto out;
3109         }
3110
3111         mutex_unlock(&sdata->local->sta_mtx);
3112
3113         /*
3114          * Always handle WMM once after association regardless
3115          * of the first value the AP uses. Setting -1 here has
3116          * that effect because the AP values is an unsigned
3117          * 4-bit value.
3118          */
3119         ifmgd->wmm_last_param_set = -1;
3120
3121         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3122                 ieee80211_set_wmm_default(sdata, false, false);
3123         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3124                                              elems.wmm_param_len)) {
3125                 /* still enable QoS since we might have HT/VHT */
3126                 ieee80211_set_wmm_default(sdata, false, true);
3127                 /* set the disable-WMM flag in this case to disable
3128                  * tracking WMM parameter changes in the beacon if
3129                  * the parameters weren't actually valid. Doing so
3130                  * avoids changing parameters very strangely when
3131                  * the AP is going back and forth between valid and
3132                  * invalid parameters.
3133                  */
3134                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3135         }
3136         changed |= BSS_CHANGED_QOS;
3137
3138         /* set AID and assoc capability,
3139          * ieee80211_set_associated() will tell the driver */
3140         bss_conf->aid = aid;
3141         bss_conf->assoc_capability = capab_info;
3142         ieee80211_set_associated(sdata, cbss, changed);
3143
3144         /*
3145          * If we're using 4-addr mode, let the AP know that we're
3146          * doing so, so that it can create the STA VLAN on its side
3147          */
3148         if (ifmgd->use_4addr)
3149                 ieee80211_send_4addr_nullfunc(local, sdata);
3150
3151         /*
3152          * Start timer to probe the connection to the AP now.
3153          * Also start the timer that will detect beacon loss.
3154          */
3155         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3156         ieee80211_sta_reset_beacon_monitor(sdata);
3157
3158         ret = true;
3159  out:
3160         kfree(bss_ies);
3161         return ret;
3162 }
3163
3164 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3165                                          struct ieee80211_mgmt *mgmt,
3166                                          size_t len)
3167 {
3168         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3169         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3170         u16 capab_info, status_code, aid;
3171         struct ieee802_11_elems elems;
3172         int ac, uapsd_queues = -1;
3173         u8 *pos;
3174         bool reassoc;
3175         struct cfg80211_bss *bss;
3176         struct ieee80211_event event = {
3177                 .type = MLME_EVENT,
3178                 .u.mlme.data = ASSOC_EVENT,
3179         };
3180
3181         sdata_assert_lock(sdata);
3182
3183         if (!assoc_data)
3184                 return;
3185         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3186                 return;
3187
3188         /*
3189          * AssocResp and ReassocResp have identical structure, so process both
3190          * of them in this function.
3191          */
3192
3193         if (len < 24 + 6)
3194                 return;
3195
3196         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3197         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3198         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3199         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3200
3201         sdata_info(sdata,
3202                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3203                    reassoc ? "Rea" : "A", mgmt->sa,
3204                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3205
3206         pos = mgmt->u.assoc_resp.variable;
3207         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3208
3209         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3210             elems.timeout_int &&
3211             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3212                 u32 tu, ms;
3213                 tu = le32_to_cpu(elems.timeout_int->value);
3214                 ms = tu * 1024 / 1000;
3215                 sdata_info(sdata,
3216                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3217                            mgmt->sa, tu, ms);
3218                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3219                 assoc_data->timeout_started = true;
3220                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3221                         run_again(sdata, assoc_data->timeout);
3222                 return;
3223         }
3224
3225         bss = assoc_data->bss;
3226
3227         if (status_code != WLAN_STATUS_SUCCESS) {
3228                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3229                            mgmt->sa, status_code);
3230                 ieee80211_destroy_assoc_data(sdata, false, false);
3231                 event.u.mlme.status = MLME_DENIED;
3232                 event.u.mlme.reason = status_code;
3233                 drv_event_callback(sdata->local, sdata, &event);
3234         } else {
3235                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3236                         /* oops -- internal error -- send timeout for now */
3237                         ieee80211_destroy_assoc_data(sdata, false, false);
3238                         cfg80211_assoc_timeout(sdata->dev, bss);
3239                         return;
3240                 }
3241                 event.u.mlme.status = MLME_SUCCESS;
3242                 drv_event_callback(sdata->local, sdata, &event);
3243                 sdata_info(sdata, "associated\n");
3244
3245                 /*
3246                  * destroy assoc_data afterwards, as otherwise an idle
3247                  * recalc after assoc_data is NULL but before associated
3248                  * is set can cause the interface to go idle
3249                  */
3250                 ieee80211_destroy_assoc_data(sdata, true, false);
3251
3252                 /* get uapsd queues configuration */
3253                 uapsd_queues = 0;
3254                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3255                         if (sdata->tx_conf[ac].uapsd)
3256                                 uapsd_queues |= BIT(ac);
3257         }
3258
3259         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3260 }
3261
3262 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3263                                   struct ieee80211_mgmt *mgmt, size_t len,
3264                                   struct ieee80211_rx_status *rx_status,
3265                                   struct ieee802_11_elems *elems)
3266 {
3267         struct ieee80211_local *local = sdata->local;
3268         struct ieee80211_bss *bss;
3269         struct ieee80211_channel *channel;
3270
3271         sdata_assert_lock(sdata);
3272
3273         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3274         if (!channel)
3275                 return;
3276
3277         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3278                                         channel);
3279         if (bss) {
3280                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3281                 ieee80211_rx_bss_put(local, bss);
3282         }
3283 }
3284
3285
3286 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3287                                          struct sk_buff *skb)
3288 {
3289         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3290         struct ieee80211_if_managed *ifmgd;
3291         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3292         size_t baselen, len = skb->len;
3293         struct ieee802_11_elems elems;
3294
3295         ifmgd = &sdata->u.mgd;
3296
3297         sdata_assert_lock(sdata);
3298
3299         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3300                 return; /* ignore ProbeResp to foreign address */
3301
3302         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3303         if (baselen > len)
3304                 return;
3305
3306         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3307                                false, &elems);
3308
3309         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3310
3311         if (ifmgd->associated &&
3312             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3313                 ieee80211_reset_ap_probe(sdata);
3314 }
3315
3316 /*
3317  * This is the canonical list of information elements we care about,
3318  * the filter code also gives us all changes to the Microsoft OUI
3319  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3320  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3321  * changes to requested client power.
3322  *
3323  * We implement beacon filtering in software since that means we can
3324  * avoid processing the frame here and in cfg80211, and userspace
3325  * will not be able to tell whether the hardware supports it or not.
3326  *
3327  * XXX: This list needs to be dynamic -- userspace needs to be able to
3328  *      add items it requires. It also needs to be able to tell us to
3329  *      look out for other vendor IEs.
3330  */
3331 static const u64 care_about_ies =
3332         (1ULL << WLAN_EID_COUNTRY) |
3333         (1ULL << WLAN_EID_ERP_INFO) |
3334         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3335         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3336         (1ULL << WLAN_EID_HT_CAPABILITY) |
3337         (1ULL << WLAN_EID_HT_OPERATION) |
3338         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3339
3340 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3341                                      struct ieee80211_mgmt *mgmt, size_t len,
3342                                      struct ieee80211_rx_status *rx_status)
3343 {
3344         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3345         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3346         size_t baselen;
3347         struct ieee802_11_elems elems;
3348         struct ieee80211_local *local = sdata->local;
3349         struct ieee80211_chanctx_conf *chanctx_conf;
3350         struct ieee80211_channel *chan;
3351         struct sta_info *sta;
3352         u32 changed = 0;
3353         bool erp_valid;
3354         u8 erp_value = 0;
3355         u32 ncrc;
3356         u8 *bssid;
3357         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3358
3359         sdata_assert_lock(sdata);
3360
3361         /* Process beacon from the current BSS */
3362         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3363         if (baselen > len)
3364                 return;
3365
3366         rcu_read_lock();
3367         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3368         if (!chanctx_conf) {
3369                 rcu_read_unlock();
3370                 return;
3371         }
3372
3373         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3374                 rcu_read_unlock();
3375                 return;
3376         }
3377         chan = chanctx_conf->def.chan;
3378         rcu_read_unlock();
3379
3380         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3381             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3382                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3383                                        len - baselen, false, &elems);
3384
3385                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3386                 if (elems.tim && !elems.parse_error) {
3387                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3388                         ifmgd->dtim_period = tim_ie->dtim_period;
3389                 }
3390                 ifmgd->have_beacon = true;
3391                 ifmgd->assoc_data->need_beacon = false;
3392                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3393                         sdata->vif.bss_conf.sync_tsf =
3394                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3395                         sdata->vif.bss_conf.sync_device_ts =
3396                                 rx_status->device_timestamp;
3397                         if (elems.tim)
3398                                 sdata->vif.bss_conf.sync_dtim_count =
3399                                         elems.tim->dtim_count;
3400                         else
3401                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3402                 }
3403                 /* continue assoc process */
3404                 ifmgd->assoc_data->timeout = jiffies;
3405                 ifmgd->assoc_data->timeout_started = true;
3406                 run_again(sdata, ifmgd->assoc_data->timeout);
3407                 return;
3408         }
3409
3410         if (!ifmgd->associated ||
3411             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3412                 return;
3413         bssid = ifmgd->associated->bssid;
3414
3415         /* Track average RSSI from the Beacon frames of the current AP */
3416         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3417                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3418                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3419                 ifmgd->last_cqm_event_signal = 0;
3420                 ifmgd->count_beacon_signal = 1;
3421                 ifmgd->last_ave_beacon_signal = 0;
3422         } else {
3423                 ifmgd->count_beacon_signal++;
3424         }
3425
3426         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3427
3428         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3429             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3430                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3431                 int last_sig = ifmgd->last_ave_beacon_signal;
3432                 struct ieee80211_event event = {
3433                         .type = RSSI_EVENT,
3434                 };
3435
3436                 /*
3437                  * if signal crosses either of the boundaries, invoke callback
3438                  * with appropriate parameters
3439                  */
3440                 if (sig > ifmgd->rssi_max_thold &&
3441                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3442                         ifmgd->last_ave_beacon_signal = sig;
3443                         event.u.rssi.data = RSSI_EVENT_HIGH;
3444                         drv_event_callback(local, sdata, &event);
3445                 } else if (sig < ifmgd->rssi_min_thold &&
3446                            (last_sig >= ifmgd->rssi_max_thold ||
3447                            last_sig == 0)) {
3448                         ifmgd->last_ave_beacon_signal = sig;
3449                         event.u.rssi.data = RSSI_EVENT_LOW;
3450                         drv_event_callback(local, sdata, &event);
3451                 }
3452         }
3453
3454         if (bss_conf->cqm_rssi_thold &&
3455             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3456             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3457                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3458                 int last_event = ifmgd->last_cqm_event_signal;
3459                 int thold = bss_conf->cqm_rssi_thold;
3460                 int hyst = bss_conf->cqm_rssi_hyst;
3461
3462                 if (sig < thold &&
3463                     (last_event == 0 || sig < last_event - hyst)) {
3464                         ifmgd->last_cqm_event_signal = sig;
3465                         ieee80211_cqm_rssi_notify(
3466                                 &sdata->vif,
3467                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3468                                 GFP_KERNEL);
3469                 } else if (sig > thold &&
3470                            (last_event == 0 || sig > last_event + hyst)) {
3471                         ifmgd->last_cqm_event_signal = sig;
3472                         ieee80211_cqm_rssi_notify(
3473                                 &sdata->vif,
3474                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3475                                 GFP_KERNEL);
3476                 }
3477         }
3478
3479         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3480                 mlme_dbg_ratelimited(sdata,
3481                                      "cancelling AP probe due to a received beacon\n");
3482                 ieee80211_reset_ap_probe(sdata);
3483         }
3484
3485         /*
3486          * Push the beacon loss detection into the future since
3487          * we are processing a beacon from the AP just now.
3488          */
3489         ieee80211_sta_reset_beacon_monitor(sdata);
3490
3491         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3492         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3493                                           len - baselen, false, &elems,
3494                                           care_about_ies, ncrc);
3495
3496         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3497             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3498                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3499                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3500                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3501                                 ieee80211_hw_config(local,
3502                                                     IEEE80211_CONF_CHANGE_PS);
3503                         }
3504                         ieee80211_send_nullfunc(local, sdata, false);
3505                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3506                         local->pspolling = true;
3507
3508                         /*
3509                          * Here is assumed that the driver will be
3510                          * able to send ps-poll frame and receive a
3511                          * response even though power save mode is
3512                          * enabled, but some drivers might require
3513                          * to disable power save here. This needs
3514                          * to be investigated.
3515                          */
3516                         ieee80211_send_pspoll(local, sdata);
3517                 }
3518         }
3519
3520         if (sdata->vif.p2p) {
3521                 struct ieee80211_p2p_noa_attr noa = {};
3522                 int ret;
3523
3524                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3525                                             len - baselen,
3526                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3527                                             (u8 *) &noa, sizeof(noa));
3528                 if (ret >= 2) {
3529                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3530                                 /* valid noa_attr and index changed */
3531                                 sdata->u.mgd.p2p_noa_index = noa.index;
3532                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3533                                 changed |= BSS_CHANGED_P2P_PS;
3534                                 /*
3535                                  * make sure we update all information, the CRC
3536                                  * mechanism doesn't look at P2P attributes.
3537                                  */
3538                                 ifmgd->beacon_crc_valid = false;
3539                         }
3540                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3541                         /* noa_attr not found and we had valid noa_attr before */
3542                         sdata->u.mgd.p2p_noa_index = -1;
3543                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3544                         changed |= BSS_CHANGED_P2P_PS;
3545                         ifmgd->beacon_crc_valid = false;
3546                 }
3547         }
3548
3549         if (ifmgd->csa_waiting_bcn)
3550                 ieee80211_chswitch_post_beacon(sdata);
3551
3552         /*
3553          * Update beacon timing and dtim count on every beacon appearance. This
3554          * will allow the driver to use the most updated values. Do it before
3555          * comparing this one with last received beacon.
3556          * IMPORTANT: These parameters would possibly be out of sync by the time
3557          * the driver will use them. The synchronized view is currently
3558          * guaranteed only in certain callbacks.
3559          */
3560         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3561                 sdata->vif.bss_conf.sync_tsf =
3562                         le64_to_cpu(mgmt->u.beacon.timestamp);
3563                 sdata->vif.bss_conf.sync_device_ts =
3564                         rx_status->device_timestamp;
3565                 if (elems.tim)
3566                         sdata->vif.bss_conf.sync_dtim_count =
3567                                 elems.tim->dtim_count;
3568                 else
3569                         sdata->vif.bss_conf.sync_dtim_count = 0;
3570         }
3571
3572         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3573                 return;
3574         ifmgd->beacon_crc = ncrc;
3575         ifmgd->beacon_crc_valid = true;
3576
3577         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3578
3579         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3580                                          rx_status->device_timestamp,
3581                                          &elems, true);
3582
3583         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3584             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3585                                      elems.wmm_param_len))
3586                 changed |= BSS_CHANGED_QOS;
3587
3588         /*
3589          * If we haven't had a beacon before, tell the driver about the
3590          * DTIM period (and beacon timing if desired) now.
3591          */
3592         if (!ifmgd->have_beacon) {
3593                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3594                 if (elems.tim)
3595                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3596                 else
3597                         bss_conf->dtim_period = 1;
3598
3599                 changed |= BSS_CHANGED_BEACON_INFO;
3600                 ifmgd->have_beacon = true;
3601
3602                 mutex_lock(&local->iflist_mtx);
3603                 ieee80211_recalc_ps(local);
3604                 mutex_unlock(&local->iflist_mtx);
3605
3606                 ieee80211_recalc_ps_vif(sdata);
3607         }
3608
3609         if (elems.erp_info) {
3610                 erp_valid = true;
3611                 erp_value = elems.erp_info[0];
3612         } else {
3613                 erp_valid = false;
3614         }
3615         changed |= ieee80211_handle_bss_capability(sdata,
3616                         le16_to_cpu(mgmt->u.beacon.capab_info),
3617                         erp_valid, erp_value);
3618
3619         mutex_lock(&local->sta_mtx);
3620         sta = sta_info_get(sdata, bssid);
3621
3622         if (ieee80211_config_bw(sdata, sta,
3623                                 elems.ht_cap_elem, elems.ht_operation,
3624                                 elems.vht_operation, bssid, &changed)) {
3625                 mutex_unlock(&local->sta_mtx);
3626                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3627                                        WLAN_REASON_DEAUTH_LEAVING,
3628                                        true, deauth_buf);
3629                 ieee80211_report_disconnect(sdata, deauth_buf,
3630                                             sizeof(deauth_buf), true,
3631                                             WLAN_REASON_DEAUTH_LEAVING);
3632                 return;
3633         }
3634
3635         if (sta && elems.opmode_notif)
3636                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3637                                             rx_status->band);
3638         mutex_unlock(&local->sta_mtx);
3639
3640         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3641                                                elems.country_elem,
3642                                                elems.country_elem_len,
3643                                                elems.pwr_constr_elem,
3644                                                elems.cisco_dtpc_elem);
3645
3646         ieee80211_bss_info_change_notify(sdata, changed);
3647 }
3648
3649 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3650                                   struct sk_buff *skb)
3651 {
3652         struct ieee80211_rx_status *rx_status;
3653         struct ieee80211_mgmt *mgmt;
3654         u16 fc;
3655         struct ieee802_11_elems elems;
3656         int ies_len;
3657
3658         rx_status = (struct ieee80211_rx_status *) skb->cb;
3659         mgmt = (struct ieee80211_mgmt *) skb->data;
3660         fc = le16_to_cpu(mgmt->frame_control);
3661
3662         sdata_lock(sdata);
3663
3664         switch (fc & IEEE80211_FCTL_STYPE) {
3665         case IEEE80211_STYPE_BEACON:
3666                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3667                 break;
3668         case IEEE80211_STYPE_PROBE_RESP:
3669                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3670                 break;
3671         case IEEE80211_STYPE_AUTH:
3672                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3673                 break;
3674         case IEEE80211_STYPE_DEAUTH:
3675                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3676                 break;
3677         case IEEE80211_STYPE_DISASSOC:
3678                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3679                 break;
3680         case IEEE80211_STYPE_ASSOC_RESP:
3681         case IEEE80211_STYPE_REASSOC_RESP:
3682                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3683                 break;
3684         case IEEE80211_STYPE_ACTION:
3685                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3686                         ies_len = skb->len -
3687                                   offsetof(struct ieee80211_mgmt,
3688                                            u.action.u.chan_switch.variable);
3689
3690                         if (ies_len < 0)
3691                                 break;
3692
3693                         ieee802_11_parse_elems(
3694                                 mgmt->u.action.u.chan_switch.variable,
3695                                 ies_len, true, &elems);
3696
3697                         if (elems.parse_error)
3698                                 break;
3699
3700                         ieee80211_sta_process_chanswitch(sdata,
3701                                                  rx_status->mactime,
3702                                                  rx_status->device_timestamp,
3703                                                  &elems, false);
3704                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3705                         ies_len = skb->len -
3706                                   offsetof(struct ieee80211_mgmt,
3707                                            u.action.u.ext_chan_switch.variable);
3708
3709                         if (ies_len < 0)
3710                                 break;
3711
3712                         ieee802_11_parse_elems(
3713                                 mgmt->u.action.u.ext_chan_switch.variable,
3714                                 ies_len, true, &elems);
3715
3716                         if (elems.parse_error)
3717                                 break;
3718
3719                         /* for the handling code pretend this was also an IE */
3720                         elems.ext_chansw_ie =
3721                                 &mgmt->u.action.u.ext_chan_switch.data;
3722
3723                         ieee80211_sta_process_chanswitch(sdata,
3724                                                  rx_status->mactime,
3725                                                  rx_status->device_timestamp,
3726                                                  &elems, false);
3727                 }
3728                 break;
3729         }
3730         sdata_unlock(sdata);
3731 }
3732
3733 static void ieee80211_sta_timer(unsigned long data)
3734 {
3735         struct ieee80211_sub_if_data *sdata =
3736                 (struct ieee80211_sub_if_data *) data;
3737
3738         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3739 }
3740
3741 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3742                                           u8 *bssid, u8 reason, bool tx)
3743 {
3744         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3745
3746         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3747                                tx, frame_buf);
3748
3749         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3750                                     reason);
3751 }
3752
3753 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3754 {
3755         struct ieee80211_local *local = sdata->local;
3756         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3757         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3758         u32 tx_flags = 0;
3759         u16 trans = 1;
3760         u16 status = 0;
3761
3762         sdata_assert_lock(sdata);
3763
3764         if (WARN_ON_ONCE(!auth_data))
3765                 return -EINVAL;
3766
3767         auth_data->tries++;
3768
3769         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3770                 sdata_info(sdata, "authentication with %pM timed out\n",
3771                            auth_data->bss->bssid);
3772
3773                 /*
3774                  * Most likely AP is not in the range so remove the
3775                  * bss struct for that AP.
3776                  */
3777                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3778
3779                 return -ETIMEDOUT;
3780         }
3781
3782         drv_mgd_prepare_tx(local, sdata);
3783
3784         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3785                    auth_data->bss->bssid, auth_data->tries,
3786                    IEEE80211_AUTH_MAX_TRIES);
3787
3788         auth_data->expected_transaction = 2;
3789
3790         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3791                 trans = auth_data->sae_trans;
3792                 status = auth_data->sae_status;
3793                 auth_data->expected_transaction = trans;
3794         }
3795
3796         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3797                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3798                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3799
3800         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3801                             auth_data->data, auth_data->data_len,
3802                             auth_data->bss->bssid,
3803                             auth_data->bss->bssid, NULL, 0, 0,
3804                             tx_flags);
3805
3806         if (tx_flags == 0) {
3807                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3808                 auth_data->timeout_started = true;
3809                 run_again(sdata, auth_data->timeout);
3810         } else {
3811                 auth_data->timeout =
3812                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3813                 auth_data->timeout_started = true;
3814                 run_again(sdata, auth_data->timeout);
3815         }
3816
3817         return 0;
3818 }
3819
3820 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3821 {
3822         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3823         struct ieee80211_local *local = sdata->local;
3824
3825         sdata_assert_lock(sdata);
3826
3827         assoc_data->tries++;
3828         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3829                 sdata_info(sdata, "association with %pM timed out\n",
3830                            assoc_data->bss->bssid);
3831
3832                 /*
3833                  * Most likely AP is not in the range so remove the
3834                  * bss struct for that AP.
3835                  */
3836                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3837
3838                 return -ETIMEDOUT;
3839         }
3840
3841         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3842                    assoc_data->bss->bssid, assoc_data->tries,
3843                    IEEE80211_ASSOC_MAX_TRIES);
3844         ieee80211_send_assoc(sdata);
3845
3846         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3847                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3848                 assoc_data->timeout_started = true;
3849                 run_again(sdata, assoc_data->timeout);
3850         } else {
3851                 assoc_data->timeout =
3852                         round_jiffies_up(jiffies +
3853                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3854                 assoc_data->timeout_started = true;
3855                 run_again(sdata, assoc_data->timeout);
3856         }
3857
3858         return 0;
3859 }
3860
3861 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3862                                   __le16 fc, bool acked)
3863 {
3864         struct ieee80211_local *local = sdata->local;
3865
3866         sdata->u.mgd.status_fc = fc;
3867         sdata->u.mgd.status_acked = acked;
3868         sdata->u.mgd.status_received = true;
3869
3870         ieee80211_queue_work(&local->hw, &sdata->work);
3871 }
3872
3873 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3874 {
3875         struct ieee80211_local *local = sdata->local;
3876         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3877
3878         sdata_lock(sdata);
3879
3880         if (ifmgd->status_received) {
3881                 __le16 fc = ifmgd->status_fc;
3882                 bool status_acked = ifmgd->status_acked;
3883
3884                 ifmgd->status_received = false;
3885                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3886                         if (status_acked) {
3887                                 ifmgd->auth_data->timeout =
3888                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3889                                 run_again(sdata, ifmgd->auth_data->timeout);
3890                         } else {
3891                                 ifmgd->auth_data->timeout = jiffies - 1;
3892                         }
3893                         ifmgd->auth_data->timeout_started = true;
3894                 } else if (ifmgd->assoc_data &&
3895                            (ieee80211_is_assoc_req(fc) ||
3896                             ieee80211_is_reassoc_req(fc))) {
3897                         if (status_acked) {
3898                                 ifmgd->assoc_data->timeout =
3899                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3900                                 run_again(sdata, ifmgd->assoc_data->timeout);
3901                         } else {
3902                                 ifmgd->assoc_data->timeout = jiffies - 1;
3903                         }
3904                         ifmgd->assoc_data->timeout_started = true;
3905                 }
3906         }
3907
3908         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3909             time_after(jiffies, ifmgd->auth_data->timeout)) {
3910                 if (ifmgd->auth_data->done) {
3911                         /*
3912                          * ok ... we waited for assoc but userspace didn't,
3913                          * so let's just kill the auth data
3914                          */
3915                         ieee80211_destroy_auth_data(sdata, false);
3916                 } else if (ieee80211_auth(sdata)) {
3917                         u8 bssid[ETH_ALEN];
3918                         struct ieee80211_event event = {
3919                                 .type = MLME_EVENT,
3920                                 .u.mlme.data = AUTH_EVENT,
3921                                 .u.mlme.status = MLME_TIMEOUT,
3922                         };
3923
3924                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3925
3926                         ieee80211_destroy_auth_data(sdata, false);
3927
3928                         cfg80211_auth_timeout(sdata->dev, bssid);
3929                         drv_event_callback(sdata->local, sdata, &event);
3930                 }
3931         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3932                 run_again(sdata, ifmgd->auth_data->timeout);
3933
3934         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3935             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3936                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3937                     ieee80211_do_assoc(sdata)) {
3938                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3939                         struct ieee80211_event event = {
3940                                 .type = MLME_EVENT,
3941                                 .u.mlme.data = ASSOC_EVENT,
3942                                 .u.mlme.status = MLME_TIMEOUT,
3943                         };
3944
3945                         ieee80211_destroy_assoc_data(sdata, false, false);
3946                         cfg80211_assoc_timeout(sdata->dev, bss);
3947                         drv_event_callback(sdata->local, sdata, &event);
3948                 }
3949         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3950                 run_again(sdata, ifmgd->assoc_data->timeout);
3951
3952         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3953             ifmgd->associated) {
3954                 u8 bssid[ETH_ALEN];
3955                 int max_tries;
3956
3957                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3958
3959                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3960                         max_tries = max_nullfunc_tries;
3961                 else
3962                         max_tries = max_probe_tries;
3963
3964                 /* ACK received for nullfunc probing frame */
3965                 if (!ifmgd->probe_send_count)
3966                         ieee80211_reset_ap_probe(sdata);
3967                 else if (ifmgd->nullfunc_failed) {
3968                         if (ifmgd->probe_send_count < max_tries) {
3969                                 mlme_dbg(sdata,
3970                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3971                                          bssid, ifmgd->probe_send_count,
3972                                          max_tries);
3973                                 ieee80211_mgd_probe_ap_send(sdata);
3974                         } else {
3975                                 mlme_dbg(sdata,
3976                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3977                                          bssid);
3978                                 ieee80211_sta_connection_lost(sdata, bssid,
3979                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3980                                         false);
3981                         }
3982                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3983                         run_again(sdata, ifmgd->probe_timeout);
3984                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3985                         mlme_dbg(sdata,
3986                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3987                                  bssid, probe_wait_ms);
3988                         ieee80211_sta_connection_lost(sdata, bssid,
3989                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3990                 } else if (ifmgd->probe_send_count < max_tries) {
3991                         mlme_dbg(sdata,
3992                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3993                                  bssid, probe_wait_ms,
3994                                  ifmgd->probe_send_count, max_tries);
3995                         ieee80211_mgd_probe_ap_send(sdata);
3996                 } else {
3997                         /*
3998                          * We actually lost the connection ... or did we?
3999                          * Let's make sure!
4000                          */
4001                         wiphy_debug(local->hw.wiphy,
4002                                     "%s: No probe response from AP %pM"
4003                                     " after %dms, disconnecting.\n",
4004                                     sdata->name,
4005                                     bssid, probe_wait_ms);
4006
4007                         ieee80211_sta_connection_lost(sdata, bssid,
4008                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4009                 }
4010         }
4011
4012         sdata_unlock(sdata);
4013 }
4014
4015 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4016 {
4017         struct ieee80211_sub_if_data *sdata =
4018                 (struct ieee80211_sub_if_data *) data;
4019         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4020
4021         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4022                 return;
4023
4024         sdata->u.mgd.connection_loss = false;
4025         ieee80211_queue_work(&sdata->local->hw,
4026                              &sdata->u.mgd.beacon_connection_loss_work);
4027 }
4028
4029 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4030 {
4031         struct ieee80211_sub_if_data *sdata =
4032                 (struct ieee80211_sub_if_data *) data;
4033         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4034         struct ieee80211_local *local = sdata->local;
4035
4036         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4037                 return;
4038
4039         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4040 }
4041
4042 static void ieee80211_sta_monitor_work(struct work_struct *work)
4043 {
4044         struct ieee80211_sub_if_data *sdata =
4045                 container_of(work, struct ieee80211_sub_if_data,
4046                              u.mgd.monitor_work);
4047
4048         ieee80211_mgd_probe_ap(sdata, false);
4049 }
4050
4051 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4052 {
4053         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4054                 __ieee80211_stop_poll(sdata);
4055
4056                 /* let's probe the connection once */
4057                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4058                         ieee80211_queue_work(&sdata->local->hw,
4059                                              &sdata->u.mgd.monitor_work);
4060         }
4061 }
4062
4063 #ifdef CONFIG_PM
4064 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4065 {
4066         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4067         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4068
4069         sdata_lock(sdata);
4070
4071         if (ifmgd->auth_data || ifmgd->assoc_data) {
4072                 const u8 *bssid = ifmgd->auth_data ?
4073                                 ifmgd->auth_data->bss->bssid :
4074                                 ifmgd->assoc_data->bss->bssid;
4075
4076                 /*
4077                  * If we are trying to authenticate / associate while suspending,
4078                  * cfg80211 won't know and won't actually abort those attempts,
4079                  * thus we need to do that ourselves.
4080                  */
4081                 ieee80211_send_deauth_disassoc(sdata, bssid,
4082                                                IEEE80211_STYPE_DEAUTH,
4083                                                WLAN_REASON_DEAUTH_LEAVING,
4084                                                false, frame_buf);
4085                 if (ifmgd->assoc_data)
4086                         ieee80211_destroy_assoc_data(sdata, false, true);
4087                 if (ifmgd->auth_data)
4088                         ieee80211_destroy_auth_data(sdata, false);
4089                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4090                                       IEEE80211_DEAUTH_FRAME_LEN);
4091         }
4092
4093         /* This is a bit of a hack - we should find a better and more generic
4094          * solution to this. Normally when suspending, cfg80211 will in fact
4095          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4096          * auth (not so important) or assoc (this is the problem) process.
4097          *
4098          * As a consequence, it can happen that we are in the process of both
4099          * associating and suspending, and receive an association response
4100          * after cfg80211 has checked if it needs to disconnect, but before
4101          * we actually set the flag to drop incoming frames. This will then
4102          * cause the workqueue flush to process the association response in
4103          * the suspend, resulting in a successful association just before it
4104          * tries to remove the interface from the driver, which now though
4105          * has a channel context assigned ... this results in issues.
4106          *
4107          * To work around this (for now) simply deauth here again if we're
4108          * now connected.
4109          */
4110         if (ifmgd->associated && !sdata->local->wowlan) {
4111                 u8 bssid[ETH_ALEN];
4112                 struct cfg80211_deauth_request req = {
4113                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4114                         .bssid = bssid,
4115                 };
4116
4117                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4118                 ieee80211_mgd_deauth(sdata, &req);
4119         }
4120
4121         sdata_unlock(sdata);
4122 }
4123
4124 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4125 {
4126         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4127
4128         sdata_lock(sdata);
4129         if (!ifmgd->associated) {
4130                 sdata_unlock(sdata);
4131                 return;
4132         }
4133
4134         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4135                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4136                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4137                 ieee80211_sta_connection_lost(sdata,
4138                                               ifmgd->associated->bssid,
4139                                               WLAN_REASON_UNSPECIFIED,
4140                                               true);
4141                 sdata_unlock(sdata);
4142                 return;
4143         }
4144         sdata_unlock(sdata);
4145 }
4146 #endif
4147
4148 /* interface setup */
4149 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4150 {
4151         struct ieee80211_if_managed *ifmgd;
4152
4153         ifmgd = &sdata->u.mgd;
4154         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4155         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4156         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4157                   ieee80211_beacon_connection_loss_work);
4158         INIT_WORK(&ifmgd->csa_connection_drop_work,
4159                   ieee80211_csa_connection_drop_work);
4160         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4161         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4162                           ieee80211_tdls_peer_del_work);
4163         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4164                     (unsigned long) sdata);
4165         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4166                     (unsigned long) sdata);
4167         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4168                     (unsigned long) sdata);
4169         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4170                     (unsigned long) sdata);
4171         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4172                           ieee80211_sta_handle_tspec_ac_params_wk);
4173
4174         ifmgd->flags = 0;
4175         ifmgd->powersave = sdata->wdev.ps;
4176         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4177         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4178         ifmgd->p2p_noa_index = -1;
4179
4180         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4181                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4182         else
4183                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4184
4185         /* Setup TDLS data */
4186         spin_lock_init(&ifmgd->teardown_lock);
4187         ifmgd->teardown_skb = NULL;
4188         ifmgd->orig_teardown_skb = NULL;
4189 }
4190
4191 /* scan finished notification */
4192 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4193 {
4194         struct ieee80211_sub_if_data *sdata;
4195
4196         /* Restart STA timers */
4197         rcu_read_lock();
4198         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4199                 if (ieee80211_sdata_running(sdata))
4200                         ieee80211_restart_sta_timer(sdata);
4201         }
4202         rcu_read_unlock();
4203 }
4204
4205 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4206                                      struct cfg80211_bss *cbss)
4207 {
4208         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4209         const u8 *ht_cap_ie, *vht_cap_ie;
4210         const struct ieee80211_ht_cap *ht_cap;
4211         const struct ieee80211_vht_cap *vht_cap;
4212         u8 chains = 1;
4213
4214         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4215                 return chains;
4216
4217         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4218         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4219                 ht_cap = (void *)(ht_cap_ie + 2);
4220                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4221                 /*
4222                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4223                  *       "Tx Unequal Modulation Supported" fields.
4224                  */
4225         }
4226
4227         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4228                 return chains;
4229
4230         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4231         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4232                 u8 nss;
4233                 u16 tx_mcs_map;
4234
4235                 vht_cap = (void *)(vht_cap_ie + 2);
4236                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4237                 for (nss = 8; nss > 0; nss--) {
4238                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4239                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4240                                 break;
4241                 }
4242                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4243                 chains = max(chains, nss);
4244         }
4245
4246         return chains;
4247 }
4248
4249 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4250                                   struct cfg80211_bss *cbss)
4251 {
4252         struct ieee80211_local *local = sdata->local;
4253         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4254         const struct ieee80211_ht_cap *ht_cap = NULL;
4255         const struct ieee80211_ht_operation *ht_oper = NULL;
4256         const struct ieee80211_vht_operation *vht_oper = NULL;
4257         struct ieee80211_supported_band *sband;
4258         struct cfg80211_chan_def chandef;
4259         int ret;
4260         u32 i;
4261         bool have_80mhz;
4262
4263         sband = local->hw.wiphy->bands[cbss->channel->band];
4264
4265         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4266                           IEEE80211_STA_DISABLE_80P80MHZ |
4267                           IEEE80211_STA_DISABLE_160MHZ);
4268
4269         rcu_read_lock();
4270
4271         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4272             sband->ht_cap.ht_supported) {
4273                 const u8 *ht_oper_ie, *ht_cap_ie;
4274
4275                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4276                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4277                         ht_oper = (void *)(ht_oper_ie + 2);
4278
4279                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4280                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4281                         ht_cap = (void *)(ht_cap_ie + 2);
4282
4283                 if (!ht_cap) {
4284                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4285                         ht_oper = NULL;
4286                 }
4287         }
4288
4289         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4290             sband->vht_cap.vht_supported) {
4291                 const u8 *vht_oper_ie, *vht_cap;
4292
4293                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4294                                                    WLAN_EID_VHT_OPERATION);
4295                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4296                         vht_oper = (void *)(vht_oper_ie + 2);
4297                 if (vht_oper && !ht_oper) {
4298                         vht_oper = NULL;
4299                         sdata_info(sdata,
4300                                    "AP advertised VHT without HT, disabling both\n");
4301                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4302                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4303                 }
4304
4305                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4306                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4307                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4308                         vht_oper = NULL;
4309                 }
4310         }
4311
4312         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4313         have_80mhz = false;
4314         for (i = 0; i < sband->n_channels; i++) {
4315                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4316                                                 IEEE80211_CHAN_NO_80MHZ))
4317                         continue;
4318
4319                 have_80mhz = true;
4320                 break;
4321         }
4322
4323         if (!have_80mhz)
4324                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4325
4326         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4327                                                      cbss->channel,
4328                                                      ht_cap, ht_oper, vht_oper,
4329                                                      &chandef, false);
4330
4331         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4332                                       local->rx_chains);
4333
4334         rcu_read_unlock();
4335
4336         /* will change later if needed */
4337         sdata->smps_mode = IEEE80211_SMPS_OFF;
4338
4339         mutex_lock(&local->mtx);
4340         /*
4341          * If this fails (possibly due to channel context sharing
4342          * on incompatible channels, e.g. 80+80 and 160 sharing the
4343          * same control channel) try to use a smaller bandwidth.
4344          */
4345         ret = ieee80211_vif_use_channel(sdata, &chandef,
4346                                         IEEE80211_CHANCTX_SHARED);
4347
4348         /* don't downgrade for 5 and 10 MHz channels, though. */
4349         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4350             chandef.width == NL80211_CHAN_WIDTH_10)
4351                 goto out;
4352
4353         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4354                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4355                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4356                                                 IEEE80211_CHANCTX_SHARED);
4357         }
4358  out:
4359         mutex_unlock(&local->mtx);
4360         return ret;
4361 }
4362
4363 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4364                                      struct cfg80211_bss *cbss, bool assoc,
4365                                      bool override)
4366 {
4367         struct ieee80211_local *local = sdata->local;
4368         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4369         struct ieee80211_bss *bss = (void *)cbss->priv;
4370         struct sta_info *new_sta = NULL;
4371         struct ieee80211_supported_band *sband;
4372         bool have_sta = false;
4373         int err;
4374
4375         sband = local->hw.wiphy->bands[cbss->channel->band];
4376
4377         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4378                 return -EINVAL;
4379
4380         /* If a reconfig is happening, bail out */
4381         if (local->in_reconfig)
4382                 return -EBUSY;
4383
4384         if (assoc) {
4385                 rcu_read_lock();
4386                 have_sta = sta_info_get(sdata, cbss->bssid);
4387                 rcu_read_unlock();
4388         }
4389
4390         if (!have_sta) {
4391                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4392                 if (!new_sta)
4393                         return -ENOMEM;
4394         }
4395
4396         if (new_sta || override) {
4397                 err = ieee80211_prep_channel(sdata, cbss);
4398                 if (err) {
4399                         if (new_sta)
4400                                 sta_info_free(local, new_sta);
4401                         return -EINVAL;
4402                 }
4403         }
4404
4405         if (new_sta) {
4406                 u32 rates = 0, basic_rates = 0;
4407                 bool have_higher_than_11mbit;
4408                 int min_rate = INT_MAX, min_rate_index = -1;
4409                 struct ieee80211_chanctx_conf *chanctx_conf;
4410                 const struct cfg80211_bss_ies *ies;
4411                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4412                 u32 rate_flags;
4413
4414                 rcu_read_lock();
4415                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4416                 if (WARN_ON(!chanctx_conf)) {
4417                         rcu_read_unlock();
4418                         sta_info_free(local, new_sta);
4419                         return -EINVAL;
4420                 }
4421                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4422                 rcu_read_unlock();
4423
4424                 ieee80211_get_rates(sband, bss->supp_rates,
4425                                     bss->supp_rates_len,
4426                                     &rates, &basic_rates,
4427                                     &have_higher_than_11mbit,
4428                                     &min_rate, &min_rate_index,
4429                                     shift, rate_flags);
4430
4431                 /*
4432                  * This used to be a workaround for basic rates missing
4433                  * in the association response frame. Now that we no
4434                  * longer use the basic rates from there, it probably
4435                  * doesn't happen any more, but keep the workaround so
4436                  * in case some *other* APs are buggy in different ways
4437                  * we can connect -- with a warning.
4438                  */
4439                 if (!basic_rates && min_rate_index >= 0) {
4440                         sdata_info(sdata,
4441                                    "No basic rates, using min rate instead\n");
4442                         basic_rates = BIT(min_rate_index);
4443                 }
4444
4445                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4446                 sdata->vif.bss_conf.basic_rates = basic_rates;
4447
4448                 /* cf. IEEE 802.11 9.2.12 */
4449                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4450                     have_higher_than_11mbit)
4451                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4452                 else
4453                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4454
4455                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4456
4457                 /* set timing information */
4458                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4459                 rcu_read_lock();
4460                 ies = rcu_dereference(cbss->beacon_ies);
4461                 if (ies) {
4462                         const u8 *tim_ie;
4463
4464                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4465                         sdata->vif.bss_conf.sync_device_ts =
4466                                 bss->device_ts_beacon;
4467                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4468                                                   ies->data, ies->len);
4469                         if (tim_ie && tim_ie[1] >= 2)
4470                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4471                         else
4472                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4473                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4474                                                TIMING_BEACON_ONLY)) {
4475                         ies = rcu_dereference(cbss->proberesp_ies);
4476                         /* must be non-NULL since beacon IEs were NULL */
4477                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4478                         sdata->vif.bss_conf.sync_device_ts =
4479                                 bss->device_ts_presp;
4480                         sdata->vif.bss_conf.sync_dtim_count = 0;
4481                 } else {
4482                         sdata->vif.bss_conf.sync_tsf = 0;
4483                         sdata->vif.bss_conf.sync_device_ts = 0;
4484                         sdata->vif.bss_conf.sync_dtim_count = 0;
4485                 }
4486                 rcu_read_unlock();
4487
4488                 /* tell driver about BSSID, basic rates and timing */
4489                 ieee80211_bss_info_change_notify(sdata,
4490                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4491                         BSS_CHANGED_BEACON_INT);
4492
4493                 if (assoc)
4494                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4495
4496                 err = sta_info_insert(new_sta);
4497                 new_sta = NULL;
4498                 if (err) {
4499                         sdata_info(sdata,
4500                                    "failed to insert STA entry for the AP (error %d)\n",
4501                                    err);
4502                         return err;
4503                 }
4504         } else
4505                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4506
4507         /* Cancel scan to ensure that nothing interferes with connection */
4508         if (local->scanning)
4509                 ieee80211_scan_cancel(local);
4510
4511         return 0;
4512 }
4513
4514 /* config hooks */
4515 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4516                        struct cfg80211_auth_request *req)
4517 {
4518         struct ieee80211_local *local = sdata->local;
4519         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4520         struct ieee80211_mgd_auth_data *auth_data;
4521         u16 auth_alg;
4522         int err;
4523
4524         /* prepare auth data structure */
4525
4526         switch (req->auth_type) {
4527         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4528                 auth_alg = WLAN_AUTH_OPEN;
4529                 break;
4530         case NL80211_AUTHTYPE_SHARED_KEY:
4531                 if (IS_ERR(local->wep_tx_tfm))
4532                         return -EOPNOTSUPP;
4533                 auth_alg = WLAN_AUTH_SHARED_KEY;
4534                 break;
4535         case NL80211_AUTHTYPE_FT:
4536                 auth_alg = WLAN_AUTH_FT;
4537                 break;
4538         case NL80211_AUTHTYPE_NETWORK_EAP:
4539                 auth_alg = WLAN_AUTH_LEAP;
4540                 break;
4541         case NL80211_AUTHTYPE_SAE:
4542                 auth_alg = WLAN_AUTH_SAE;
4543                 break;
4544         default:
4545                 return -EOPNOTSUPP;
4546         }
4547
4548         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4549                             req->ie_len, GFP_KERNEL);
4550         if (!auth_data)
4551                 return -ENOMEM;
4552
4553         auth_data->bss = req->bss;
4554
4555         if (req->sae_data_len >= 4) {
4556                 __le16 *pos = (__le16 *) req->sae_data;
4557                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4558                 auth_data->sae_status = le16_to_cpu(pos[1]);
4559                 memcpy(auth_data->data, req->sae_data + 4,
4560                        req->sae_data_len - 4);
4561                 auth_data->data_len += req->sae_data_len - 4;
4562         }
4563
4564         if (req->ie && req->ie_len) {
4565                 memcpy(&auth_data->data[auth_data->data_len],
4566                        req->ie, req->ie_len);
4567                 auth_data->data_len += req->ie_len;
4568         }
4569
4570         if (req->key && req->key_len) {
4571                 auth_data->key_len = req->key_len;
4572                 auth_data->key_idx = req->key_idx;
4573                 memcpy(auth_data->key, req->key, req->key_len);
4574         }
4575
4576         auth_data->algorithm = auth_alg;
4577
4578         /* try to authenticate/probe */
4579
4580         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4581             ifmgd->assoc_data) {
4582                 err = -EBUSY;
4583                 goto err_free;
4584         }
4585
4586         if (ifmgd->auth_data)
4587                 ieee80211_destroy_auth_data(sdata, false);
4588
4589         /* prep auth_data so we don't go into idle on disassoc */
4590         ifmgd->auth_data = auth_data;
4591
4592         if (ifmgd->associated) {
4593                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4594
4595                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4596                                        WLAN_REASON_UNSPECIFIED,
4597                                        false, frame_buf);
4598
4599                 ieee80211_report_disconnect(sdata, frame_buf,
4600                                             sizeof(frame_buf), true,
4601                                             WLAN_REASON_UNSPECIFIED);
4602         }
4603
4604         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4605
4606         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4607         if (err)
4608                 goto err_clear;
4609
4610         err = ieee80211_auth(sdata);
4611         if (err) {
4612                 sta_info_destroy_addr(sdata, req->bss->bssid);
4613                 goto err_clear;
4614         }
4615
4616         /* hold our own reference */
4617         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4618         return 0;
4619
4620  err_clear:
4621         eth_zero_addr(ifmgd->bssid);
4622         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4623         ifmgd->auth_data = NULL;
4624         mutex_lock(&sdata->local->mtx);
4625         ieee80211_vif_release_channel(sdata);
4626         mutex_unlock(&sdata->local->mtx);
4627  err_free:
4628         kfree(auth_data);
4629         return err;
4630 }
4631
4632 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4633                         struct cfg80211_assoc_request *req)
4634 {
4635         struct ieee80211_local *local = sdata->local;
4636         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4637         struct ieee80211_bss *bss = (void *)req->bss->priv;
4638         struct ieee80211_mgd_assoc_data *assoc_data;
4639         const struct cfg80211_bss_ies *beacon_ies;
4640         struct ieee80211_supported_band *sband;
4641         const u8 *ssidie, *ht_ie, *vht_ie;
4642         int i, err;
4643         bool override = false;
4644
4645         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4646         if (!assoc_data)
4647                 return -ENOMEM;
4648
4649         rcu_read_lock();
4650         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4651         if (!ssidie) {
4652                 rcu_read_unlock();
4653                 kfree(assoc_data);
4654                 return -EINVAL;
4655         }
4656         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4657         assoc_data->ssid_len = ssidie[1];
4658         rcu_read_unlock();
4659
4660         if (ifmgd->associated) {
4661                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4662
4663                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4664                                        WLAN_REASON_UNSPECIFIED,
4665                                        false, frame_buf);
4666
4667                 ieee80211_report_disconnect(sdata, frame_buf,
4668                                             sizeof(frame_buf), true,
4669                                             WLAN_REASON_UNSPECIFIED);
4670         }
4671
4672         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4673                 err = -EBUSY;
4674                 goto err_free;
4675         }
4676
4677         if (ifmgd->assoc_data) {
4678                 err = -EBUSY;
4679                 goto err_free;
4680         }
4681
4682         if (ifmgd->auth_data) {
4683                 bool match;
4684
4685                 /* keep sta info, bssid if matching */
4686                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4687                 ieee80211_destroy_auth_data(sdata, match);
4688         }
4689
4690         /* prepare assoc data */
4691
4692         ifmgd->beacon_crc_valid = false;
4693
4694         assoc_data->wmm = bss->wmm_used &&
4695                           (local->hw.queues >= IEEE80211_NUM_ACS);
4696
4697         /*
4698          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4699          * We still associate in non-HT mode (11a/b/g) if any one of these
4700          * ciphers is configured as pairwise.
4701          * We can set this to true for non-11n hardware, that'll be checked
4702          * separately along with the peer capabilities.
4703          */
4704         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4705                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4706                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4707                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4708                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4709                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4710                         netdev_info(sdata->dev,
4711                                     "disabling HT/VHT due to WEP/TKIP use\n");
4712                 }
4713         }
4714
4715         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4716         sband = local->hw.wiphy->bands[req->bss->channel->band];
4717         if (!sband->ht_cap.ht_supported ||
4718             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4719             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4720                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4721                 if (!bss->wmm_used &&
4722                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4723                         netdev_info(sdata->dev,
4724                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4725         }
4726
4727         /* disable VHT if we don't support it or the AP doesn't use WMM */
4728         if (!sband->vht_cap.vht_supported ||
4729             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4730             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4731                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4732                 if (!bss->wmm_used &&
4733                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4734                         netdev_info(sdata->dev,
4735                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4736         }
4737
4738         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4739         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4740                sizeof(ifmgd->ht_capa_mask));
4741
4742         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4743         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4744                sizeof(ifmgd->vht_capa_mask));
4745
4746         if (req->ie && req->ie_len) {
4747                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4748                 assoc_data->ie_len = req->ie_len;
4749         }
4750
4751         assoc_data->bss = req->bss;
4752
4753         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4754                 if (ifmgd->powersave)
4755                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4756                 else
4757                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4758         } else
4759                 sdata->smps_mode = ifmgd->req_smps;
4760
4761         assoc_data->capability = req->bss->capability;
4762         assoc_data->supp_rates = bss->supp_rates;
4763         assoc_data->supp_rates_len = bss->supp_rates_len;
4764
4765         rcu_read_lock();
4766         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4767         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4768                 assoc_data->ap_ht_param =
4769                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4770         else
4771                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4772         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4773         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4774                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4775                        sizeof(struct ieee80211_vht_cap));
4776         else
4777                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4778         rcu_read_unlock();
4779
4780         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4781                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4782              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4783                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4784
4785         if (bss->wmm_used && bss->uapsd_supported &&
4786             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4787                 assoc_data->uapsd = true;
4788                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4789         } else {
4790                 assoc_data->uapsd = false;
4791                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4792         }
4793
4794         if (req->prev_bssid)
4795                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4796
4797         if (req->use_mfp) {
4798                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4799                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4800         } else {
4801                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4802                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4803         }
4804
4805         if (req->flags & ASSOC_REQ_USE_RRM)
4806                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4807         else
4808                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4809
4810         if (req->crypto.control_port)
4811                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4812         else
4813                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4814
4815         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4816         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4817         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4818                                                         sdata->vif.type);
4819
4820         /* kick off associate process */
4821
4822         ifmgd->assoc_data = assoc_data;
4823         ifmgd->dtim_period = 0;
4824         ifmgd->have_beacon = false;
4825
4826         /* override HT/VHT configuration only if the AP and we support it */
4827         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4828                 struct ieee80211_sta_ht_cap sta_ht_cap;
4829
4830                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4831                         override = true;
4832
4833                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4834                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4835
4836                 /* check for 40 MHz disable override */
4837                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4838                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4839                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4840                         override = true;
4841
4842                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4843                     req->flags & ASSOC_REQ_DISABLE_VHT)
4844                         override = true;
4845         }
4846
4847         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4848                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4849                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4850         }
4851
4852         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4853                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4854
4855         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4856         if (err)
4857                 goto err_clear;
4858
4859         rcu_read_lock();
4860         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4861
4862         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4863             !beacon_ies) {
4864                 /*
4865                  * Wait up to one beacon interval ...
4866                  * should this be more if we miss one?
4867                  */
4868                 sdata_info(sdata, "waiting for beacon from %pM\n",
4869                            ifmgd->bssid);
4870                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4871                 assoc_data->timeout_started = true;
4872                 assoc_data->need_beacon = true;
4873         } else if (beacon_ies) {
4874                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4875                                                     beacon_ies->data,
4876                                                     beacon_ies->len);
4877                 u8 dtim_count = 0;
4878
4879                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4880                         const struct ieee80211_tim_ie *tim;
4881                         tim = (void *)(tim_ie + 2);
4882                         ifmgd->dtim_period = tim->dtim_period;
4883                         dtim_count = tim->dtim_count;
4884                 }
4885                 ifmgd->have_beacon = true;
4886                 assoc_data->timeout = jiffies;
4887                 assoc_data->timeout_started = true;
4888
4889                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4890                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4891                         sdata->vif.bss_conf.sync_device_ts =
4892                                 bss->device_ts_beacon;
4893                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4894                 }
4895         } else {
4896                 assoc_data->timeout = jiffies;
4897                 assoc_data->timeout_started = true;
4898         }
4899         rcu_read_unlock();
4900
4901         run_again(sdata, assoc_data->timeout);
4902
4903         if (bss->corrupt_data) {
4904                 char *corrupt_type = "data";
4905                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4906                         if (bss->corrupt_data &
4907                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4908                                 corrupt_type = "beacon and probe response";
4909                         else
4910                                 corrupt_type = "beacon";
4911                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4912                         corrupt_type = "probe response";
4913                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4914                            corrupt_type);
4915         }
4916
4917         return 0;
4918  err_clear:
4919         eth_zero_addr(ifmgd->bssid);
4920         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4921         ifmgd->assoc_data = NULL;
4922  err_free:
4923         kfree(assoc_data);
4924         return err;
4925 }
4926
4927 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4928                          struct cfg80211_deauth_request *req)
4929 {
4930         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4931         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4932         bool tx = !req->local_state_change;
4933
4934         if (ifmgd->auth_data &&
4935             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4936                 sdata_info(sdata,
4937                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4938                            req->bssid, req->reason_code,
4939                            ieee80211_get_reason_code_string(req->reason_code));
4940
4941                 drv_mgd_prepare_tx(sdata->local, sdata);
4942                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4943                                                IEEE80211_STYPE_DEAUTH,
4944                                                req->reason_code, tx,
4945                                                frame_buf);
4946                 ieee80211_destroy_auth_data(sdata, false);
4947                 ieee80211_report_disconnect(sdata, frame_buf,
4948                                             sizeof(frame_buf), true,
4949                                             req->reason_code);
4950
4951                 return 0;
4952         }
4953
4954         if (ifmgd->assoc_data &&
4955             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4956                 sdata_info(sdata,
4957                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4958                            req->bssid, req->reason_code,
4959                            ieee80211_get_reason_code_string(req->reason_code));
4960
4961                 drv_mgd_prepare_tx(sdata->local, sdata);
4962                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4963                                                IEEE80211_STYPE_DEAUTH,
4964                                                req->reason_code, tx,
4965                                                frame_buf);
4966                 ieee80211_destroy_assoc_data(sdata, false, true);
4967                 ieee80211_report_disconnect(sdata, frame_buf,
4968                                             sizeof(frame_buf), true,
4969                                             req->reason_code);
4970                 return 0;
4971         }
4972
4973         if (ifmgd->associated &&
4974             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4975                 sdata_info(sdata,
4976                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4977                            req->bssid, req->reason_code,
4978                            ieee80211_get_reason_code_string(req->reason_code));
4979
4980                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4981                                        req->reason_code, tx, frame_buf);
4982                 ieee80211_report_disconnect(sdata, frame_buf,
4983                                             sizeof(frame_buf), true,
4984                                             req->reason_code);
4985                 return 0;
4986         }
4987
4988         return -ENOTCONN;
4989 }
4990
4991 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4992                            struct cfg80211_disassoc_request *req)
4993 {
4994         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4995         u8 bssid[ETH_ALEN];
4996         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4997
4998         /*
4999          * cfg80211 should catch this ... but it's racy since
5000          * we can receive a disassoc frame, process it, hand it
5001          * to cfg80211 while that's in a locked section already
5002          * trying to tell us that the user wants to disconnect.
5003          */
5004         if (ifmgd->associated != req->bss)
5005                 return -ENOLINK;
5006
5007         sdata_info(sdata,
5008                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5009                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5010
5011         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5012         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5013                                req->reason_code, !req->local_state_change,
5014                                frame_buf);
5015
5016         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5017                                     req->reason_code);
5018
5019         return 0;
5020 }
5021
5022 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5023 {
5024         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5025
5026         /*
5027          * Make sure some work items will not run after this,
5028          * they will not do anything but might not have been
5029          * cancelled when disconnecting.
5030          */
5031         cancel_work_sync(&ifmgd->monitor_work);
5032         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5033         cancel_work_sync(&ifmgd->request_smps_work);
5034         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5035         cancel_work_sync(&ifmgd->chswitch_work);
5036         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5037
5038         sdata_lock(sdata);
5039         if (ifmgd->assoc_data) {
5040                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5041                 ieee80211_destroy_assoc_data(sdata, false, false);
5042                 cfg80211_assoc_timeout(sdata->dev, bss);
5043         }
5044         if (ifmgd->auth_data)
5045                 ieee80211_destroy_auth_data(sdata, false);
5046         spin_lock_bh(&ifmgd->teardown_lock);
5047         if (ifmgd->teardown_skb) {
5048                 kfree_skb(ifmgd->teardown_skb);
5049                 ifmgd->teardown_skb = NULL;
5050                 ifmgd->orig_teardown_skb = NULL;
5051         }
5052         spin_unlock_bh(&ifmgd->teardown_lock);
5053         del_timer_sync(&ifmgd->timer);
5054         sdata_unlock(sdata);
5055 }
5056
5057 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5058                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5059                                gfp_t gfp)
5060 {
5061         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5062
5063         trace_api_cqm_rssi_notify(sdata, rssi_event);
5064
5065         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5066 }
5067 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5068
5069 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5070 {
5071         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5072
5073         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5074
5075         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5076 }
5077 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);