net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  * Copyright 2013-2014  Intel Mobile Communications GmbH
   9  * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/crc32.h>
  24 #include <linux/slab.h>
  25 #include <linux/export.h>
  26 #include <net/mac80211.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "led.h"
  33
  34 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  35 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  36 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  37 #define IEEE80211_AUTH_MAX_TRIES        3
  38 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  39 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  40 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  41 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  42 #define IEEE80211_ASSOC_MAX_TRIES       3
  43
  44 static int max_nullfunc_tries = 2;
  45 module_param(max_nullfunc_tries, int, 0644);
  46 MODULE_PARM_DESC(max_nullfunc_tries,
  47                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  48
  49 static int max_probe_tries = 5;
  50 module_param(max_probe_tries, int, 0644);
  51 MODULE_PARM_DESC(max_probe_tries,
  52                  "Maximum probe tries before disconnecting (reason 4).");
  53
  54 /*
  55  * Beacon loss timeout is calculated as N frames times the
  56  * advertised beacon interval.  This may need to be somewhat
  57  * higher than what hardware might detect to account for
  58  * delays in the host processing frames. But since we also
  59  * probe on beacon miss before declaring the connection lost
  60  * default to what we want.
  61  */
  62 static int beacon_loss_count = 7;
  63 module_param(beacon_loss_count, int, 0644);
  64 MODULE_PARM_DESC(beacon_loss_count,
  65                  "Number of beacon intervals before we decide beacon was lost.");
  66
  67 /*
  68  * Time the connection can be idle before we probe
  69  * it to see if we can still talk to the AP.
  70  */
  71 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  72 /*
  73  * Time we wait for a probe response after sending
  74  * a probe request because of beacon loss or for
  75  * checking the connection still works.
  76  */
  77 static int probe_wait_ms = 500;
  78 module_param(probe_wait_ms, int, 0644);
  79 MODULE_PARM_DESC(probe_wait_ms,
  80                  "Maximum time(ms) to wait for probe response"
  81                  " before disconnecting (reason 4).");
  82
  83 /*
  84  * How many Beacon frames need to have been used in average signal strength
  85  * before starting to indicate signal change events.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  88
  89 /*
  90  * We can have multiple work items (and connection probing)
  91  * scheduling this timer, but we need to take care to only
  92  * reschedule it when it should fire _earlier_ than it was
  93  * asked for before, or if it's not pending right now. This
  94  * function ensures that. Note that it then is required to
  95  * run this function for all timeouts after the first one
  96  * has happened -- the work that runs from this timer will
  97  * do that.
  98  */
  99 static void run_again(struct ieee80211_sub_if_data *sdata,
 100                       unsigned long timeout)
 101 {
 102         sdata_assert_lock(sdata);
 103
 104         if (!timer_pending(&sdata->u.mgd.timer) ||
 105             time_before(timeout, sdata->u.mgd.timer.expires))
 106                 mod_timer(&sdata->u.mgd.timer, timeout);
 107 }
 108
 109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 110 {
 111         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 112                 return;
 113
 114         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 115                 return;
 116
 117         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 118                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 119 }
 120
 121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 122 {
 123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 124
 125         if (unlikely(!ifmgd->associated))
 126                 return;
 127
 128         if (ifmgd->probe_send_count)
 129                 ifmgd->probe_send_count = 0;
 130
 131         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 132                 return;
 133
 134         mod_timer(&ifmgd->conn_mon_timer,
 135                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 136 }
 137
 138 static int ecw2cw(int ecw)
 139 {
 140         return (1 << ecw) - 1;
 141 }
 142
 143 static u32
 144 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 145                              struct ieee80211_supported_band *sband,
 146                              struct ieee80211_channel *channel,
 147                              const struct ieee80211_ht_cap *ht_cap,
 148                              const struct ieee80211_ht_operation *ht_oper,
 149                              const struct ieee80211_vht_operation *vht_oper,
 150                              struct cfg80211_chan_def *chandef, bool tracking)
 151 {
 152         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 153         struct cfg80211_chan_def vht_chandef;
 154         struct ieee80211_sta_ht_cap sta_ht_cap;
 155         u32 ht_cfreq, ret;
 156
 157         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 158         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 159
 160         chandef->chan = channel;
 161         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 162         chandef->center_freq1 = channel->center_freq;
 163         chandef->center_freq2 = 0;
 164
 165         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
 166                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 167                 goto out;
 168         }
 169
 170         chandef->width = NL80211_CHAN_WIDTH_20;
 171
 172         if (!(ht_cap->cap_info &
 173               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
 174                 ret = IEEE80211_STA_DISABLE_40MHZ;
 175                 vht_chandef = *chandef;
 176                 goto out;
 177         }
 178
 179         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 180                                                   channel->band);
 181         /* check that channel matches the right operating channel */
 182         if (!tracking && channel->center_freq != ht_cfreq) {
 183                 /*
 184                  * It's possible that some APs are confused here;
 185                  * Netgear WNDR3700 sometimes reports 4 higher than
 186                  * the actual channel in association responses, but
 187                  * since we look at probe response/beacon data here
 188                  * it should be OK.
 189                  */
 190                 sdata_info(sdata,
 191                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 192                            channel->center_freq, ht_cfreq,
 193                            ht_oper->primary_chan, channel->band);
 194                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 195                 goto out;
 196         }
 197
 198         /* check 40 MHz support, if we have it */
 199         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 200                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 201         } else {
 202                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 203                 ret = IEEE80211_STA_DISABLE_VHT;
 204                 /* also mark 40 MHz disabled */
 205                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 206                 goto out;
 207         }
 208
 209         if (!vht_oper || !sband->vht_cap.vht_supported) {
 210                 ret = IEEE80211_STA_DISABLE_VHT;
 211                 goto out;
 212         }
 213
 214         vht_chandef = *chandef;
 215         if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
 216                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 217                         sdata_info(sdata,
 218                                    "AP VHT information is invalid, disable VHT\n");
 219                 ret = IEEE80211_STA_DISABLE_VHT;
 220                 goto out;
 221         }
 222
 223         if (!cfg80211_chandef_valid(&vht_chandef)) {
 224                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 225                         sdata_info(sdata,
 226                                    "AP VHT information is invalid, disable VHT\n");
 227                 ret = IEEE80211_STA_DISABLE_VHT;
 228                 goto out;
 229         }
 230
 231         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 232                 ret = 0;
 233                 goto out;
 234         }
 235
 236         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 237                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 238                         sdata_info(sdata,
 239                                    "AP VHT information doesn't match HT, disable VHT\n");
 240                 ret = IEEE80211_STA_DISABLE_VHT;
 241                 goto out;
 242         }
 243
 244         *chandef = vht_chandef;
 245
 246         ret = 0;
 247
 248 out:
 249         /*
 250          * When tracking the current AP, don't do any further checks if the
 251          * new chandef is identical to the one we're currently using for the
 252          * connection. This keeps us from playing ping-pong with regulatory,
 253          * without it the following can happen (for example):
 254          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 255          *  - AP advertises regdom US
 256          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 257          *  - the code below detects an unsupported channel, downgrades, and
 258          *    we disconnect from the AP in the caller
 259          *  - disconnect causes CRDA to reload world regdomain and the game
 260          *    starts anew.
 261          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 262          *
 263          * It seems possible that there are still scenarios with CSA or real
 264          * bandwidth changes where a this could happen, but those cases are
 265          * less common and wouldn't completely prevent using the AP.
 266          */
 267         if (tracking &&
 268             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 269                 return ret;
 270
 271         /* don't print the message below for VHT mismatch if VHT is disabled */
 272         if (ret & IEEE80211_STA_DISABLE_VHT)
 273                 vht_chandef = *chandef;
 274
 275         /*
 276          * Ignore the DISABLED flag when we're already connected and only
 277          * tracking the APs beacon for bandwidth changes - otherwise we
 278          * might get disconnected here if we connect to an AP, update our
 279          * regulatory information based on the AP's country IE and the
 280          * information we have is wrong/outdated and disables the channel
 281          * that we're actually using for the connection to the AP.
 282          */
 283         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 284                                         tracking ? 0 :
 285                                                    IEEE80211_CHAN_DISABLED)) {
 286                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 287                         ret = IEEE80211_STA_DISABLE_HT |
 288                               IEEE80211_STA_DISABLE_VHT;
 289                         break;
 290                 }
 291
 292                 ret |= ieee80211_chandef_downgrade(chandef);
 293         }
 294
 295         if (chandef->width != vht_chandef.width && !tracking)
 296                 sdata_info(sdata,
 297                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 298
 299         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 300         return ret;
 301 }
 302
 303 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 304                                struct sta_info *sta,
 305                                const struct ieee80211_ht_cap *ht_cap,
 306                                const struct ieee80211_ht_operation *ht_oper,
 307                                const struct ieee80211_vht_operation *vht_oper,
 308                                const u8 *bssid, u32 *changed)
 309 {
 310         struct ieee80211_local *local = sdata->local;
 311         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 312         struct ieee80211_supported_band *sband;
 313         struct ieee80211_channel *chan;
 314         struct cfg80211_chan_def chandef;
 315         u16 ht_opmode;
 316         u32 flags;
 317         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 318         int ret;
 319
 320         /* if HT was/is disabled, don't track any bandwidth changes */
 321         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 322                 return 0;
 323
 324         /* don't check VHT if we associated as non-VHT station */
 325         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 326                 vht_oper = NULL;
 327
 328         if (WARN_ON_ONCE(!sta))
 329                 return -EINVAL;
 330
 331         /*
 332          * if bss configuration changed store the new one -
 333          * this may be applicable even if channel is identical
 334          */
 335         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 336         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 337                 *changed |= BSS_CHANGED_HT;
 338                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 339         }
 340
 341         chan = sdata->vif.bss_conf.chandef.chan;
 342         sband = local->hw.wiphy->bands[chan->band];
 343
 344         /* calculate new channel (type) based on HT/VHT operation IEs */
 345         flags = ieee80211_determine_chantype(sdata, sband, chan,
 346                                              ht_cap, ht_oper, vht_oper,
 347                                              &chandef, true);
 348
 349         /*
 350          * Downgrade the new channel if we associated with restricted
 351          * capabilities. For example, if we associated as a 20 MHz STA
 352          * to a 40 MHz AP (due to regulatory, capabilities or config
 353          * reasons) then switching to a 40 MHz channel now won't do us
 354          * any good -- we couldn't use it with the AP.
 355          */
 356         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 357             chandef.width == NL80211_CHAN_WIDTH_80P80)
 358                 flags |= ieee80211_chandef_downgrade(&chandef);
 359         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 360             chandef.width == NL80211_CHAN_WIDTH_160)
 361                 flags |= ieee80211_chandef_downgrade(&chandef);
 362         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 363             chandef.width > NL80211_CHAN_WIDTH_20)
 364                 flags |= ieee80211_chandef_downgrade(&chandef);
 365
 366         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 367                 return 0;
 368
 369         sdata_info(sdata,
 370                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 371                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 372                    chandef.center_freq1, chandef.center_freq2);
 373
 374         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 375                                       IEEE80211_STA_DISABLE_VHT |
 376                                       IEEE80211_STA_DISABLE_40MHZ |
 377                                       IEEE80211_STA_DISABLE_80P80MHZ |
 378                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 379             !cfg80211_chandef_valid(&chandef)) {
 380                 sdata_info(sdata,
 381                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 382                            ifmgd->bssid);
 383                 return -EINVAL;
 384         }
 385
 386         switch (chandef.width) {
 387         case NL80211_CHAN_WIDTH_20_NOHT:
 388         case NL80211_CHAN_WIDTH_20:
 389                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 390                 break;
 391         case NL80211_CHAN_WIDTH_40:
 392                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 393                 break;
 394         case NL80211_CHAN_WIDTH_80:
 395                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 396                 break;
 397         case NL80211_CHAN_WIDTH_80P80:
 398         case NL80211_CHAN_WIDTH_160:
 399                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 400                 break;
 401         default:
 402                 return -EINVAL;
 403         }
 404
 405         if (new_sta_bw > sta->cur_max_bandwidth)
 406                 new_sta_bw = sta->cur_max_bandwidth;
 407
 408         if (new_sta_bw < sta->sta.bandwidth) {
 409                 sta->sta.bandwidth = new_sta_bw;
 410                 rate_control_rate_update(local, sband, sta,
 411                                          IEEE80211_RC_BW_CHANGED);
 412         }
 413
 414         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 415         if (ret) {
 416                 sdata_info(sdata,
 417                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 418                            ifmgd->bssid);
 419                 return ret;
 420         }
 421
 422         if (new_sta_bw > sta->sta.bandwidth) {
 423                 sta->sta.bandwidth = new_sta_bw;
 424                 rate_control_rate_update(local, sband, sta,
 425                                          IEEE80211_RC_BW_CHANGED);
 426         }
 427
 428         return 0;
 429 }
 430
 431 /* frame sending functions */
 432
 433 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 434                                 struct sk_buff *skb, u8 ap_ht_param,
 435                                 struct ieee80211_supported_band *sband,
 436                                 struct ieee80211_channel *channel,
 437                                 enum ieee80211_smps_mode smps)
 438 {
 439         u8 *pos;
 440         u32 flags = channel->flags;
 441         u16 cap;
 442         struct ieee80211_sta_ht_cap ht_cap;
 443
 444         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 445
 446         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 447         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 448
 449         /* determine capability flags */
 450         cap = ht_cap.cap;
 451
 452         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 453         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 454                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 455                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 456                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 457                 }
 458                 break;
 459         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 460                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 461                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 462                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 463                 }
 464                 break;
 465         }
 466
 467         /*
 468          * If 40 MHz was disabled associate as though we weren't
 469          * capable of 40 MHz -- some broken APs will never fall
 470          * back to trying to transmit in 20 MHz.
 471          */
 472         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 473                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 474                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 475         }
 476
 477         /* set SM PS mode properly */
 478         cap &= ~IEEE80211_HT_CAP_SM_PS;
 479         switch (smps) {
 480         case IEEE80211_SMPS_AUTOMATIC:
 481         case IEEE80211_SMPS_NUM_MODES:
 482                 WARN_ON(1);
 483         case IEEE80211_SMPS_OFF:
 484                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 485                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 486                 break;
 487         case IEEE80211_SMPS_STATIC:
 488                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 489                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 490                 break;
 491         case IEEE80211_SMPS_DYNAMIC:
 492                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 493                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 494                 break;
 495         }
 496
 497         /* reserve and fill IE */
 498         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 499         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 500 }
 501
 502 /* This function determines vht capability flags for the association
 503  * and builds the IE.
 504  * Note - the function may set the owner of the MU-MIMO capability
 505  */
 506 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 507                                  struct sk_buff *skb,
 508                                  struct ieee80211_supported_band *sband,
 509                                  struct ieee80211_vht_cap *ap_vht_cap)
 510 {
 511         struct ieee80211_local *local = sdata->local;
 512         u8 *pos;
 513         u32 cap;
 514         struct ieee80211_sta_vht_cap vht_cap;
 515         u32 mask, ap_bf_sts, our_bf_sts;
 516
 517         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 518
 519         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 520         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 521
 522         /* determine capability flags */
 523         cap = vht_cap.cap;
 524
 525         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 526                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 527
 528                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 529                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 530                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 531                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 532         }
 533
 534         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 535                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 536                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 537         }
 538
 539         /*
 540          * Some APs apparently get confused if our capabilities are better
 541          * than theirs, so restrict what we advertise in the assoc request.
 542          */
 543         if (!(ap_vht_cap->vht_cap_info &
 544                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 545                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 546                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 547         else if (!(ap_vht_cap->vht_cap_info &
 548                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 549                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 550
 551         /*
 552          * If some other vif is using the MU-MIMO capablity we cannot associate
 553          * using MU-MIMO - this will lead to contradictions in the group-id
 554          * mechanism.
 555          * Ownership is defined since association request, in order to avoid
 556          * simultaneous associations with MU-MIMO.
 557          */
 558         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 559                 bool disable_mu_mimo = false;
 560                 struct ieee80211_sub_if_data *other;
 561
 562                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 563                         if (other->vif.mu_mimo_owner) {
 564                                 disable_mu_mimo = true;
 565                                 break;
 566                         }
 567                 }
 568                 if (disable_mu_mimo)
 569                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 570                 else
 571                         sdata->vif.mu_mimo_owner = true;
 572         }
 573
 574         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 575
 576         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 577         our_bf_sts = cap & mask;
 578
 579         if (ap_bf_sts < our_bf_sts) {
 580                 cap &= ~mask;
 581                 cap |= ap_bf_sts;
 582         }
 583
 584         /* reserve and fill IE */
 585         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 586         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 587 }
 588
 589 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 590 {
 591         struct ieee80211_local *local = sdata->local;
 592         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 593         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 594         struct sk_buff *skb;
 595         struct ieee80211_mgmt *mgmt;
 596         u8 *pos, qos_info;
 597         size_t offset = 0, noffset;
 598         int i, count, rates_len, supp_rates_len, shift;
 599         u16 capab;
 600         struct ieee80211_supported_band *sband;
 601         struct ieee80211_chanctx_conf *chanctx_conf;
 602         struct ieee80211_channel *chan;
 603         u32 rate_flags, rates = 0;
 604
 605         sdata_assert_lock(sdata);
 606
 607         rcu_read_lock();
 608         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 609         if (WARN_ON(!chanctx_conf)) {
 610                 rcu_read_unlock();
 611                 return;
 612         }
 613         chan = chanctx_conf->def.chan;
 614         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 615         rcu_read_unlock();
 616         sband = local->hw.wiphy->bands[chan->band];
 617         shift = ieee80211_vif_get_shift(&sdata->vif);
 618
 619         if (assoc_data->supp_rates_len) {
 620                 /*
 621                  * Get all rates supported by the device and the AP as
 622                  * some APs don't like getting a superset of their rates
 623                  * in the association request (e.g. D-Link DAP 1353 in
 624                  * b-only mode)...
 625                  */
 626                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 627                                                      assoc_data->supp_rates,
 628                                                      assoc_data->supp_rates_len,
 629                                                      &rates);
 630         } else {
 631                 /*
 632                  * In case AP not provide any supported rates information
 633                  * before association, we send information element(s) with
 634                  * all rates that we support.
 635                  */
 636                 rates_len = 0;
 637                 for (i = 0; i < sband->n_bitrates; i++) {
 638                         if ((rate_flags & sband->bitrates[i].flags)
 639                             != rate_flags)
 640                                 continue;
 641                         rates |= BIT(i);
 642                         rates_len++;
 643                 }
 644         }
 645
 646         skb = alloc_skb(local->hw.extra_tx_headroom +
 647                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 648                         2 + assoc_data->ssid_len + /* SSID */
 649                         4 + rates_len + /* (extended) rates */
 650                         4 + /* power capability */
 651                         2 + 2 * sband->n_channels + /* supported channels */
 652                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 653                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 654                         assoc_data->ie_len + /* extra IEs */
 655                         9, /* WMM */
 656                         GFP_KERNEL);
 657         if (!skb)
 658                 return;
 659
 660         skb_reserve(skb, local->hw.extra_tx_headroom);
 661
 662         capab = WLAN_CAPABILITY_ESS;
 663
 664         if (sband->band == NL80211_BAND_2GHZ) {
 665                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 666                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 667         }
 668
 669         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 670                 capab |= WLAN_CAPABILITY_PRIVACY;
 671
 672         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 673             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 674                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 675
 676         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 677                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 678
 679         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 680         memset(mgmt, 0, 24);
 681         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 682         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 683         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 684
 685         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 686                 skb_put(skb, 10);
 687                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 688                                                   IEEE80211_STYPE_REASSOC_REQ);
 689                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 690                 mgmt->u.reassoc_req.listen_interval =
 691                                 cpu_to_le16(local->hw.conf.listen_interval);
 692                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 693                        ETH_ALEN);
 694         } else {
 695                 skb_put(skb, 4);
 696                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 697                                                   IEEE80211_STYPE_ASSOC_REQ);
 698                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 699                 mgmt->u.assoc_req.listen_interval =
 700                                 cpu_to_le16(local->hw.conf.listen_interval);
 701         }
 702
 703         /* SSID */
 704         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 705         *pos++ = WLAN_EID_SSID;
 706         *pos++ = assoc_data->ssid_len;
 707         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 708
 709         /* add all rates which were marked to be used above */
 710         supp_rates_len = rates_len;
 711         if (supp_rates_len > 8)
 712                 supp_rates_len = 8;
 713
 714         pos = skb_put(skb, supp_rates_len + 2);
 715         *pos++ = WLAN_EID_SUPP_RATES;
 716         *pos++ = supp_rates_len;
 717
 718         count = 0;
 719         for (i = 0; i < sband->n_bitrates; i++) {
 720                 if (BIT(i) & rates) {
 721                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 722                                                 5 * (1 << shift));
 723                         *pos++ = (u8) rate;
 724                         if (++count == 8)
 725                                 break;
 726                 }
 727         }
 728
 729         if (rates_len > count) {
 730                 pos = skb_put(skb, rates_len - count + 2);
 731                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 732                 *pos++ = rates_len - count;
 733
 734                 for (i++; i < sband->n_bitrates; i++) {
 735                         if (BIT(i) & rates) {
 736                                 int rate;
 737                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 738                                                     5 * (1 << shift));
 739                                 *pos++ = (u8) rate;
 740                         }
 741                 }
 742         }
 743
 744         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 745             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 746                 pos = skb_put(skb, 4);
 747                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 748                 *pos++ = 2;
 749                 *pos++ = 0; /* min tx power */
 750                  /* max tx power */
 751                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 752         }
 753
 754         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 755                 /* TODO: get this in reg domain format */
 756                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 757                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 758                 *pos++ = 2 * sband->n_channels;
 759                 for (i = 0; i < sband->n_channels; i++) {
 760                         *pos++ = ieee80211_frequency_to_channel(
 761                                         sband->channels[i].center_freq);
 762                         *pos++ = 1; /* one channel in the subband*/
 763                 }
 764         }
 765
 766         /* if present, add any custom IEs that go before HT */
 767         if (assoc_data->ie_len) {
 768                 static const u8 before_ht[] = {
 769                         WLAN_EID_SSID,
 770                         WLAN_EID_SUPP_RATES,
 771                         WLAN_EID_EXT_SUPP_RATES,
 772                         WLAN_EID_PWR_CAPABILITY,
 773                         WLAN_EID_SUPPORTED_CHANNELS,
 774                         WLAN_EID_RSN,
 775                         WLAN_EID_QOS_CAPA,
 776                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 777                         WLAN_EID_MOBILITY_DOMAIN,
 778                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 779                         WLAN_EID_RIC_DATA,              /* reassoc only */
 780                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 781                 };
 782                 static const u8 after_ric[] = {
 783                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 784                         WLAN_EID_HT_CAPABILITY,
 785                         WLAN_EID_BSS_COEX_2040,
 786                         WLAN_EID_EXT_CAPABILITY,
 787                         WLAN_EID_QOS_TRAFFIC_CAPA,
 788                         WLAN_EID_TIM_BCAST_REQ,
 789                         WLAN_EID_INTERWORKING,
 790                         /* 60GHz doesn't happen right now */
 791                         WLAN_EID_VHT_CAPABILITY,
 792                         WLAN_EID_OPMODE_NOTIF,
 793                 };
 794
 795                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 796                                                  assoc_data->ie_len,
 797                                                  before_ht,
 798                                                  ARRAY_SIZE(before_ht),
 799                                                  after_ric,
 800                                                  ARRAY_SIZE(after_ric),
 801                                                  offset);
 802                 pos = skb_put(skb, noffset - offset);
 803                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 804                 offset = noffset;
 805         }
 806
 807         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 808                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 809                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 810
 811         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 812                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 813                                     sband, chan, sdata->smps_mode);
 814
 815         /* if present, add any custom IEs that go before VHT */
 816         if (assoc_data->ie_len) {
 817                 static const u8 before_vht[] = {
 818                         WLAN_EID_SSID,
 819                         WLAN_EID_SUPP_RATES,
 820                         WLAN_EID_EXT_SUPP_RATES,
 821                         WLAN_EID_PWR_CAPABILITY,
 822                         WLAN_EID_SUPPORTED_CHANNELS,
 823                         WLAN_EID_RSN,
 824                         WLAN_EID_QOS_CAPA,
 825                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 826                         WLAN_EID_MOBILITY_DOMAIN,
 827                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 828                         WLAN_EID_HT_CAPABILITY,
 829                         WLAN_EID_BSS_COEX_2040,
 830                         WLAN_EID_EXT_CAPABILITY,
 831                         WLAN_EID_QOS_TRAFFIC_CAPA,
 832                         WLAN_EID_TIM_BCAST_REQ,
 833                         WLAN_EID_INTERWORKING,
 834                 };
 835
 836                 /* RIC already taken above, so no need to handle here anymore */
 837                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 838                                              before_vht, ARRAY_SIZE(before_vht),
 839                                              offset);
 840                 pos = skb_put(skb, noffset - offset);
 841                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 842                 offset = noffset;
 843         }
 844
 845         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 846                 ieee80211_add_vht_ie(sdata, skb, sband,
 847                                      &assoc_data->ap_vht_cap);
 848
 849         /* if present, add any custom non-vendor IEs that go after HT */
 850         if (assoc_data->ie_len) {
 851                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 852                                                     assoc_data->ie_len,
 853                                                     offset);
 854                 pos = skb_put(skb, noffset - offset);
 855                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 856                 offset = noffset;
 857         }
 858
 859         if (assoc_data->wmm) {
 860                 if (assoc_data->uapsd) {
 861                         qos_info = ifmgd->uapsd_queues;
 862                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 863                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 864                 } else {
 865                         qos_info = 0;
 866                 }
 867
 868                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 869         }
 870
 871         /* add any remaining custom (i.e. vendor specific here) IEs */
 872         if (assoc_data->ie_len) {
 873                 noffset = assoc_data->ie_len;
 874                 pos = skb_put(skb, noffset - offset);
 875                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 876         }
 877
 878         drv_mgd_prepare_tx(local, sdata);
 879
 880         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 881         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 882                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 883                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 884         ieee80211_tx_skb(sdata, skb);
 885 }
 886
 887 void ieee80211_send_pspoll(struct ieee80211_local *local,
 888                            struct ieee80211_sub_if_data *sdata)
 889 {
 890         struct ieee80211_pspoll *pspoll;
 891         struct sk_buff *skb;
 892
 893         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 894         if (!skb)
 895                 return;
 896
 897         pspoll = (struct ieee80211_pspoll *) skb->data;
 898         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 899
 900         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 901         ieee80211_tx_skb(sdata, skb);
 902 }
 903
 904 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 905                              struct ieee80211_sub_if_data *sdata,
 906                              bool powersave)
 907 {
 908         struct sk_buff *skb;
 909         struct ieee80211_hdr_3addr *nullfunc;
 910         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 911
 912         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 913         if (!skb)
 914                 return;
 915
 916         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 917         if (powersave)
 918                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 919
 920         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 921                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 922
 923         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 924                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 925
 926         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 927                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 928
 929         ieee80211_tx_skb(sdata, skb);
 930 }
 931
 932 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 933                                           struct ieee80211_sub_if_data *sdata)
 934 {
 935         struct sk_buff *skb;
 936         struct ieee80211_hdr *nullfunc;
 937         __le16 fc;
 938
 939         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 940                 return;
 941
 942         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 943         if (!skb)
 944                 return;
 945
 946         skb_reserve(skb, local->hw.extra_tx_headroom);
 947
 948         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 949         memset(nullfunc, 0, 30);
 950         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 951                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 952         nullfunc->frame_control = fc;
 953         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 954         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 955         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 956         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 957
 958         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 959         ieee80211_tx_skb(sdata, skb);
 960 }
 961
 962 /* spectrum management related things */
 963 static void ieee80211_chswitch_work(struct work_struct *work)
 964 {
 965         struct ieee80211_sub_if_data *sdata =
 966                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 967         struct ieee80211_local *local = sdata->local;
 968         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 969         int ret;
 970
 971         if (!ieee80211_sdata_running(sdata))
 972                 return;
 973
 974         sdata_lock(sdata);
 975         mutex_lock(&local->mtx);
 976         mutex_lock(&local->chanctx_mtx);
 977
 978         if (!ifmgd->associated)
 979                 goto out;
 980
 981         if (!sdata->vif.csa_active)
 982                 goto out;
 983
 984         /*
 985          * using reservation isn't immediate as it may be deferred until later
 986          * with multi-vif. once reservation is complete it will re-schedule the
 987          * work with no reserved_chanctx so verify chandef to check if it
 988          * completed successfully
 989          */
 990
 991         if (sdata->reserved_chanctx) {
 992                 struct ieee80211_supported_band *sband = NULL;
 993                 struct sta_info *mgd_sta = NULL;
 994                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
 995
 996                 /*
 997                  * with multi-vif csa driver may call ieee80211_csa_finish()
 998                  * many times while waiting for other interfaces to use their
 999                  * reservations
1000                  */
1001                 if (sdata->reserved_ready)
1002                         goto out;
1003
1004                 if (sdata->vif.bss_conf.chandef.width !=
1005                     sdata->csa_chandef.width) {
1006                         /*
1007                          * For managed interface, we need to also update the AP
1008                          * station bandwidth and align the rate scale algorithm
1009                          * on the bandwidth change. Here we only consider the
1010                          * bandwidth of the new channel definition (as channel
1011                          * switch flow does not have the full HT/VHT/HE
1012                          * information), assuming that if additional changes are
1013                          * required they would be done as part of the processing
1014                          * of the next beacon from the AP.
1015                          */
1016                         switch (sdata->csa_chandef.width) {
1017                         case NL80211_CHAN_WIDTH_20_NOHT:
1018                         case NL80211_CHAN_WIDTH_20:
1019                         default:
1020                                 bw = IEEE80211_STA_RX_BW_20;
1021                                 break;
1022                         case NL80211_CHAN_WIDTH_40:
1023                                 bw = IEEE80211_STA_RX_BW_40;
1024                                 break;
1025                         case NL80211_CHAN_WIDTH_80:
1026                                 bw = IEEE80211_STA_RX_BW_80;
1027                                 break;
1028                         case NL80211_CHAN_WIDTH_80P80:
1029                         case NL80211_CHAN_WIDTH_160:
1030                                 bw = IEEE80211_STA_RX_BW_160;
1031                                 break;
1032                         }
1033
1034                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1035                         sband =
1036                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1037                 }
1038
1039                 if (sdata->vif.bss_conf.chandef.width >
1040                     sdata->csa_chandef.width) {
1041                         mgd_sta->sta.bandwidth = bw;
1042                         rate_control_rate_update(local, sband, mgd_sta,
1043                                                  IEEE80211_RC_BW_CHANGED);
1044                 }
1045
1046                 ret = ieee80211_vif_use_reserved_context(sdata);
1047                 if (ret) {
1048                         sdata_info(sdata,
1049                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1050                                    ret);
1051                         ieee80211_queue_work(&sdata->local->hw,
1052                                              &ifmgd->csa_connection_drop_work);
1053                         goto out;
1054                 }
1055
1056                 if (sdata->vif.bss_conf.chandef.width <
1057                     sdata->csa_chandef.width) {
1058                         mgd_sta->sta.bandwidth = bw;
1059                         rate_control_rate_update(local, sband, mgd_sta,
1060                                                  IEEE80211_RC_BW_CHANGED);
1061                 }
1062
1063                 goto out;
1064         }
1065
1066         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1067                                         &sdata->csa_chandef)) {
1068                 sdata_info(sdata,
1069                            "failed to finalize channel switch, disconnecting\n");
1070                 ieee80211_queue_work(&sdata->local->hw,
1071                                      &ifmgd->csa_connection_drop_work);
1072                 goto out;
1073         }
1074
1075         ifmgd->csa_waiting_bcn = true;
1076
1077         ieee80211_sta_reset_beacon_monitor(sdata);
1078         ieee80211_sta_reset_conn_monitor(sdata);
1079
1080 out:
1081         mutex_unlock(&local->chanctx_mtx);
1082         mutex_unlock(&local->mtx);
1083         sdata_unlock(sdata);
1084 }
1085
1086 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1087 {
1088         struct ieee80211_local *local = sdata->local;
1089         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1090         int ret;
1091
1092         sdata_assert_lock(sdata);
1093
1094         WARN_ON(!sdata->vif.csa_active);
1095
1096         if (sdata->csa_block_tx) {
1097                 ieee80211_wake_vif_queues(local, sdata,
1098                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1099                 sdata->csa_block_tx = false;
1100         }
1101
1102         sdata->vif.csa_active = false;
1103         ifmgd->csa_waiting_bcn = false;
1104
1105         ret = drv_post_channel_switch(sdata);
1106         if (ret) {
1107                 sdata_info(sdata,
1108                            "driver post channel switch failed, disconnecting\n");
1109                 ieee80211_queue_work(&local->hw,
1110                                      &ifmgd->csa_connection_drop_work);
1111                 return;
1112         }
1113
1114         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1115 }
1116
1117 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1118 {
1119         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1120         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1121
1122         trace_api_chswitch_done(sdata, success);
1123         if (!success) {
1124                 sdata_info(sdata,
1125                            "driver channel switch failed, disconnecting\n");
1126                 ieee80211_queue_work(&sdata->local->hw,
1127                                      &ifmgd->csa_connection_drop_work);
1128         } else {
1129                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1130         }
1131 }
1132 EXPORT_SYMBOL(ieee80211_chswitch_done);
1133
1134 static void ieee80211_chswitch_timer(unsigned long data)
1135 {
1136         struct ieee80211_sub_if_data *sdata =
1137                 (struct ieee80211_sub_if_data *) data;
1138
1139         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1140 }
1141
1142 static void
1143 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1144                                  u64 timestamp, u32 device_timestamp,
1145                                  struct ieee802_11_elems *elems,
1146                                  bool beacon)
1147 {
1148         struct ieee80211_local *local = sdata->local;
1149         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1150         struct cfg80211_bss *cbss = ifmgd->associated;
1151         struct ieee80211_chanctx_conf *conf;
1152         struct ieee80211_chanctx *chanctx;
1153         enum nl80211_band current_band;
1154         struct ieee80211_csa_ie csa_ie;
1155         struct ieee80211_channel_switch ch_switch;
1156         int res;
1157
1158         sdata_assert_lock(sdata);
1159
1160         if (!cbss)
1161                 return;
1162
1163         if (local->scanning)
1164                 return;
1165
1166         /* disregard subsequent announcements if we are already processing */
1167         if (sdata->vif.csa_active)
1168                 return;
1169
1170         current_band = cbss->channel->band;
1171         memset(&csa_ie, 0, sizeof(csa_ie));
1172         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1173                                            ifmgd->flags,
1174                                            ifmgd->associated->bssid, &csa_ie);
1175         if (res < 0)
1176                 ieee80211_queue_work(&local->hw,
1177                                      &ifmgd->csa_connection_drop_work);
1178         if (res)
1179                 return;
1180
1181         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1182                                      IEEE80211_CHAN_DISABLED)) {
1183                 sdata_info(sdata,
1184                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1185                            ifmgd->associated->bssid,
1186                            csa_ie.chandef.chan->center_freq,
1187                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1188                            csa_ie.chandef.center_freq2);
1189                 ieee80211_queue_work(&local->hw,
1190                                      &ifmgd->csa_connection_drop_work);
1191                 return;
1192         }
1193
1194         if (cfg80211_chandef_identical(&csa_ie.chandef,
1195                                        &sdata->vif.bss_conf.chandef)) {
1196                 if (ifmgd->csa_ignored_same_chan)
1197                         return;
1198                 sdata_info(sdata,
1199                            "AP %pM tries to chanswitch to same channel, ignore\n",
1200                            ifmgd->associated->bssid);
1201                 ifmgd->csa_ignored_same_chan = true;
1202                 return;
1203         }
1204
1205         /*
1206          * Drop all TDLS peers - either we disconnect or move to a different
1207          * channel from this point on. There's no telling what our peer will do.
1208          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1209          * have an incompatible wider chandef.
1210          */
1211         ieee80211_teardown_tdls_peers(sdata);
1212
1213         mutex_lock(&local->mtx);
1214         mutex_lock(&local->chanctx_mtx);
1215         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1216                                          lockdep_is_held(&local->chanctx_mtx));
1217         if (!conf) {
1218                 sdata_info(sdata,
1219                            "no channel context assigned to vif?, disconnecting\n");
1220                 goto drop_connection;
1221         }
1222
1223         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1224
1225         if (local->use_chanctx &&
1226             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1227                 sdata_info(sdata,
1228                            "driver doesn't support chan-switch with channel contexts\n");
1229                 goto drop_connection;
1230         }
1231
1232         ch_switch.timestamp = timestamp;
1233         ch_switch.device_timestamp = device_timestamp;
1234         ch_switch.block_tx = csa_ie.mode;
1235         ch_switch.chandef = csa_ie.chandef;
1236         ch_switch.count = csa_ie.count;
1237
1238         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1239                 sdata_info(sdata,
1240                            "preparing for channel switch failed, disconnecting\n");
1241                 goto drop_connection;
1242         }
1243
1244         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1245                                             chanctx->mode, false);
1246         if (res) {
1247                 sdata_info(sdata,
1248                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1249                            res);
1250                 goto drop_connection;
1251         }
1252         mutex_unlock(&local->chanctx_mtx);
1253
1254         sdata->vif.csa_active = true;
1255         sdata->csa_chandef = csa_ie.chandef;
1256         sdata->csa_block_tx = csa_ie.mode;
1257         ifmgd->csa_ignored_same_chan = false;
1258
1259         if (sdata->csa_block_tx)
1260                 ieee80211_stop_vif_queues(local, sdata,
1261                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1262         mutex_unlock(&local->mtx);
1263
1264         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1265                                           csa_ie.count);
1266
1267         if (local->ops->channel_switch) {
1268                 /* use driver's channel switch callback */
1269                 drv_channel_switch(local, sdata, &ch_switch);
1270                 return;
1271         }
1272
1273         /* channel switch handled in software */
1274         if (csa_ie.count <= 1)
1275                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1276         else
1277                 mod_timer(&ifmgd->chswitch_timer,
1278                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1279                                          cbss->beacon_interval));
1280         return;
1281  drop_connection:
1282         /*
1283          * This is just so that the disconnect flow will know that
1284          * we were trying to switch channel and failed. In case the
1285          * mode is 1 (we are not allowed to Tx), we will know not to
1286          * send a deauthentication frame. Those two fields will be
1287          * reset when the disconnection worker runs.
1288          */
1289         sdata->vif.csa_active = true;
1290         sdata->csa_block_tx = csa_ie.mode;
1291
1292         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1293         mutex_unlock(&local->chanctx_mtx);
1294         mutex_unlock(&local->mtx);
1295 }
1296
1297 static bool
1298 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1299                                  struct ieee80211_channel *channel,
1300                                  const u8 *country_ie, u8 country_ie_len,
1301                                  const u8 *pwr_constr_elem,
1302                                  int *chan_pwr, int *pwr_reduction)
1303 {
1304         struct ieee80211_country_ie_triplet *triplet;
1305         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1306         int i, chan_increment;
1307         bool have_chan_pwr = false;
1308
1309         /* Invalid IE */
1310         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1311                 return false;
1312
1313         triplet = (void *)(country_ie + 3);
1314         country_ie_len -= 3;
1315
1316         switch (channel->band) {
1317         default:
1318                 WARN_ON_ONCE(1);
1319                 /* fall through */
1320         case NL80211_BAND_2GHZ:
1321         case NL80211_BAND_60GHZ:
1322                 chan_increment = 1;
1323                 break;
1324         case NL80211_BAND_5GHZ:
1325                 chan_increment = 4;
1326                 break;
1327         }
1328
1329         /* find channel */
1330         while (country_ie_len >= 3) {
1331                 u8 first_channel = triplet->chans.first_channel;
1332
1333                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1334                         goto next;
1335
1336                 for (i = 0; i < triplet->chans.num_channels; i++) {
1337                         if (first_channel + i * chan_increment == chan) {
1338                                 have_chan_pwr = true;
1339                                 *chan_pwr = triplet->chans.max_power;
1340                                 break;
1341                         }
1342                 }
1343                 if (have_chan_pwr)
1344                         break;
1345
1346  next:
1347                 triplet++;
1348                 country_ie_len -= 3;
1349         }
1350
1351         if (have_chan_pwr && pwr_constr_elem)
1352                 *pwr_reduction = *pwr_constr_elem;
1353         else
1354                 *pwr_reduction = 0;
1355
1356         return have_chan_pwr;
1357 }
1358
1359 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1360                                       struct ieee80211_channel *channel,
1361                                       const u8 *cisco_dtpc_ie,
1362                                       int *pwr_level)
1363 {
1364         /* From practical testing, the first data byte of the DTPC element
1365          * seems to contain the requested dBm level, and the CLI on Cisco
1366          * APs clearly state the range is -127 to 127 dBm, which indicates
1367          * a signed byte, although it seemingly never actually goes negative.
1368          * The other byte seems to always be zero.
1369          */
1370         *pwr_level = (__s8)cisco_dtpc_ie[4];
1371 }
1372
1373 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1374                                        struct ieee80211_channel *channel,
1375                                        struct ieee80211_mgmt *mgmt,
1376                                        const u8 *country_ie, u8 country_ie_len,
1377                                        const u8 *pwr_constr_ie,
1378                                        const u8 *cisco_dtpc_ie)
1379 {
1380         bool has_80211h_pwr = false, has_cisco_pwr = false;
1381         int chan_pwr = 0, pwr_reduction_80211h = 0;
1382         int pwr_level_cisco, pwr_level_80211h;
1383         int new_ap_level;
1384         __le16 capab = mgmt->u.probe_resp.capab_info;
1385
1386         if (country_ie &&
1387             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1388              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1389                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1390                         sdata, channel, country_ie, country_ie_len,
1391                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1392                 pwr_level_80211h =
1393                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1394         }
1395
1396         if (cisco_dtpc_ie) {
1397                 ieee80211_find_cisco_dtpc(
1398                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1399                 has_cisco_pwr = true;
1400         }
1401
1402         if (!has_80211h_pwr && !has_cisco_pwr)
1403                 return 0;
1404
1405         /* If we have both 802.11h and Cisco DTPC, apply both limits
1406          * by picking the smallest of the two power levels advertised.
1407          */
1408         if (has_80211h_pwr &&
1409             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1410                 new_ap_level = pwr_level_80211h;
1411
1412                 if (sdata->ap_power_level == new_ap_level)
1413                         return 0;
1414
1415                 sdata_dbg(sdata,
1416                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1417                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1418                           sdata->u.mgd.bssid);
1419         } else {  /* has_cisco_pwr is always true here. */
1420                 new_ap_level = pwr_level_cisco;
1421
1422                 if (sdata->ap_power_level == new_ap_level)
1423                         return 0;
1424
1425                 sdata_dbg(sdata,
1426                           "Limiting TX power to %d dBm as advertised by %pM\n",
1427                           pwr_level_cisco, sdata->u.mgd.bssid);
1428         }
1429
1430         sdata->ap_power_level = new_ap_level;
1431         if (__ieee80211_recalc_txpower(sdata))
1432                 return BSS_CHANGED_TXPOWER;
1433         return 0;
1434 }
1435
1436 /* powersave */
1437 static void ieee80211_enable_ps(struct ieee80211_local *local,
1438                                 struct ieee80211_sub_if_data *sdata)
1439 {
1440         struct ieee80211_conf *conf = &local->hw.conf;
1441
1442         /*
1443          * If we are scanning right now then the parameters will
1444          * take effect when scan finishes.
1445          */
1446         if (local->scanning)
1447                 return;
1448
1449         if (conf->dynamic_ps_timeout > 0 &&
1450             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1451                 mod_timer(&local->dynamic_ps_timer, jiffies +
1452                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1453         } else {
1454                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1455                         ieee80211_send_nullfunc(local, sdata, true);
1456
1457                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1458                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1459                         return;
1460
1461                 conf->flags |= IEEE80211_CONF_PS;
1462                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1463         }
1464 }
1465
1466 static void ieee80211_change_ps(struct ieee80211_local *local)
1467 {
1468         struct ieee80211_conf *conf = &local->hw.conf;
1469
1470         if (local->ps_sdata) {
1471                 ieee80211_enable_ps(local, local->ps_sdata);
1472         } else if (conf->flags & IEEE80211_CONF_PS) {
1473                 conf->flags &= ~IEEE80211_CONF_PS;
1474                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1475                 del_timer_sync(&local->dynamic_ps_timer);
1476                 cancel_work_sync(&local->dynamic_ps_enable_work);
1477         }
1478 }
1479
1480 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1481 {
1482         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1483         struct sta_info *sta = NULL;
1484         bool authorized = false;
1485
1486         if (!mgd->powersave)
1487                 return false;
1488
1489         if (mgd->broken_ap)
1490                 return false;
1491
1492         if (!mgd->associated)
1493                 return false;
1494
1495         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1496                 return false;
1497
1498         if (!mgd->have_beacon)
1499                 return false;
1500
1501         rcu_read_lock();
1502         sta = sta_info_get(sdata, mgd->bssid);
1503         if (sta)
1504                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1505         rcu_read_unlock();
1506
1507         return authorized;
1508 }
1509
1510 /* need to hold RTNL or interface lock */
1511 void ieee80211_recalc_ps(struct ieee80211_local *local)
1512 {
1513         struct ieee80211_sub_if_data *sdata, *found = NULL;
1514         int count = 0;
1515         int timeout;
1516
1517         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1518                 local->ps_sdata = NULL;
1519                 return;
1520         }
1521
1522         list_for_each_entry(sdata, &local->interfaces, list) {
1523                 if (!ieee80211_sdata_running(sdata))
1524                         continue;
1525                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1526                         /* If an AP vif is found, then disable PS
1527                          * by setting the count to zero thereby setting
1528                          * ps_sdata to NULL.
1529                          */
1530                         count = 0;
1531                         break;
1532                 }
1533                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1534                         continue;
1535                 found = sdata;
1536                 count++;
1537         }
1538
1539         if (count == 1 && ieee80211_powersave_allowed(found)) {
1540                 u8 dtimper = found->u.mgd.dtim_period;
1541                 s32 beaconint_us;
1542
1543                 beaconint_us = ieee80211_tu_to_usec(
1544                                         found->vif.bss_conf.beacon_int);
1545
1546                 timeout = local->dynamic_ps_forced_timeout;
1547                 if (timeout < 0)
1548                         timeout = 100;
1549                 local->hw.conf.dynamic_ps_timeout = timeout;
1550
1551                 /* If the TIM IE is invalid, pretend the value is 1 */
1552                 if (!dtimper)
1553                         dtimper = 1;
1554
1555                 local->hw.conf.ps_dtim_period = dtimper;
1556                 local->ps_sdata = found;
1557         } else {
1558                 local->ps_sdata = NULL;
1559         }
1560
1561         ieee80211_change_ps(local);
1562 }
1563
1564 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1565 {
1566         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1567
1568         if (sdata->vif.bss_conf.ps != ps_allowed) {
1569                 sdata->vif.bss_conf.ps = ps_allowed;
1570                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1571         }
1572 }
1573
1574 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1575 {
1576         struct ieee80211_local *local =
1577                 container_of(work, struct ieee80211_local,
1578                              dynamic_ps_disable_work);
1579
1580         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1581                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1582                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1583         }
1584
1585         ieee80211_wake_queues_by_reason(&local->hw,
1586                                         IEEE80211_MAX_QUEUE_MAP,
1587                                         IEEE80211_QUEUE_STOP_REASON_PS,
1588                                         false);
1589 }
1590
1591 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1592 {
1593         struct ieee80211_local *local =
1594                 container_of(work, struct ieee80211_local,
1595                              dynamic_ps_enable_work);
1596         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1597         struct ieee80211_if_managed *ifmgd;
1598         unsigned long flags;
1599         int q;
1600
1601         /* can only happen when PS was just disabled anyway */
1602         if (!sdata)
1603                 return;
1604
1605         ifmgd = &sdata->u.mgd;
1606
1607         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1608                 return;
1609
1610         if (local->hw.conf.dynamic_ps_timeout > 0) {
1611                 /* don't enter PS if TX frames are pending */
1612                 if (drv_tx_frames_pending(local)) {
1613                         mod_timer(&local->dynamic_ps_timer, jiffies +
1614                                   msecs_to_jiffies(
1615                                   local->hw.conf.dynamic_ps_timeout));
1616                         return;
1617                 }
1618
1619                 /*
1620                  * transmission can be stopped by others which leads to
1621                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1622                  * is not the actual idle state.
1623                  */
1624                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1625                 for (q = 0; q < local->hw.queues; q++) {
1626                         if (local->queue_stop_reasons[q]) {
1627                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1628                                                        flags);
1629                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1630                                           msecs_to_jiffies(
1631                                           local->hw.conf.dynamic_ps_timeout));
1632                                 return;
1633                         }
1634                 }
1635                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1636         }
1637
1638         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1639             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1640                 if (drv_tx_frames_pending(local)) {
1641                         mod_timer(&local->dynamic_ps_timer, jiffies +
1642                                   msecs_to_jiffies(
1643                                   local->hw.conf.dynamic_ps_timeout));
1644                 } else {
1645                         ieee80211_send_nullfunc(local, sdata, true);
1646                         /* Flush to get the tx status of nullfunc frame */
1647                         ieee80211_flush_queues(local, sdata, false);
1648                 }
1649         }
1650
1651         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1652               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1653             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1654                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1655                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1656                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1657         }
1658 }
1659
1660 void ieee80211_dynamic_ps_timer(unsigned long data)
1661 {
1662         struct ieee80211_local *local = (void *) data;
1663
1664         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1665 }
1666
1667 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1668 {
1669         struct delayed_work *delayed_work = to_delayed_work(work);
1670         struct ieee80211_sub_if_data *sdata =
1671                 container_of(delayed_work, struct ieee80211_sub_if_data,
1672                              dfs_cac_timer_work);
1673         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1674
1675         mutex_lock(&sdata->local->mtx);
1676         if (sdata->wdev.cac_started) {
1677                 ieee80211_vif_release_channel(sdata);
1678                 cfg80211_cac_event(sdata->dev, &chandef,
1679                                    NL80211_RADAR_CAC_FINISHED,
1680                                    GFP_KERNEL);
1681         }
1682         mutex_unlock(&sdata->local->mtx);
1683 }
1684
1685 static bool
1686 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1687 {
1688         struct ieee80211_local *local = sdata->local;
1689         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1690         bool ret = false;
1691         int ac;
1692
1693         if (local->hw.queues < IEEE80211_NUM_ACS)
1694                 return false;
1695
1696         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1697                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1698                 int non_acm_ac;
1699                 unsigned long now = jiffies;
1700
1701                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1702                     tx_tspec->admitted_time &&
1703                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1704                         tx_tspec->consumed_tx_time = 0;
1705                         tx_tspec->time_slice_start = now;
1706
1707                         if (tx_tspec->downgraded)
1708                                 tx_tspec->action =
1709                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1710                 }
1711
1712                 switch (tx_tspec->action) {
1713                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1714                         /* take the original parameters */
1715                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1716                                 sdata_err(sdata,
1717                                           "failed to set TX queue parameters for queue %d\n",
1718                                           ac);
1719                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1720                         tx_tspec->downgraded = false;
1721                         ret = true;
1722                         break;
1723                 case TX_TSPEC_ACTION_DOWNGRADE:
1724                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1725                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1726                                 ret = true;
1727                                 break;
1728                         }
1729                         /* downgrade next lower non-ACM AC */
1730                         for (non_acm_ac = ac + 1;
1731                              non_acm_ac < IEEE80211_NUM_ACS;
1732                              non_acm_ac++)
1733                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1734                                         break;
1735                         /* Usually the loop will result in using BK even if it
1736                          * requires admission control, but such a configuration
1737                          * makes no sense and we have to transmit somehow - the
1738                          * AC selection does the same thing.
1739                          * If we started out trying to downgrade from BK, then
1740                          * the extra condition here might be needed.
1741                          */
1742                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1743                                 non_acm_ac = IEEE80211_AC_BK;
1744                         if (drv_conf_tx(local, sdata, ac,
1745                                         &sdata->tx_conf[non_acm_ac]))
1746                                 sdata_err(sdata,
1747                                           "failed to set TX queue parameters for queue %d\n",
1748                                           ac);
1749                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1750                         ret = true;
1751                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1752                                 tx_tspec->time_slice_start + HZ - now + 1);
1753                         break;
1754                 case TX_TSPEC_ACTION_NONE:
1755                         /* nothing now */
1756                         break;
1757                 }
1758         }
1759
1760         return ret;
1761 }
1762
1763 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1764 {
1765         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1766                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1767 }
1768
1769 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1770 {
1771         struct ieee80211_sub_if_data *sdata;
1772
1773         sdata = container_of(work, struct ieee80211_sub_if_data,
1774                              u.mgd.tx_tspec_wk.work);
1775         ieee80211_sta_handle_tspec_ac_params(sdata);
1776 }
1777
1778 /* MLME */
1779 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1780                                      struct ieee80211_sub_if_data *sdata,
1781                                      const u8 *wmm_param, size_t wmm_param_len)
1782 {
1783         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1784         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1785         size_t left;
1786         int count, ac;
1787         const u8 *pos;
1788         u8 uapsd_queues = 0;
1789
1790         if (!local->ops->conf_tx)
1791                 return false;
1792
1793         if (local->hw.queues < IEEE80211_NUM_ACS)
1794                 return false;
1795
1796         if (!wmm_param)
1797                 return false;
1798
1799         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1800                 return false;
1801
1802         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1803                 uapsd_queues = ifmgd->uapsd_queues;
1804
1805         count = wmm_param[6] & 0x0f;
1806         if (count == ifmgd->wmm_last_param_set)
1807                 return false;
1808         ifmgd->wmm_last_param_set = count;
1809
1810         pos = wmm_param + 8;
1811         left = wmm_param_len - 8;
1812
1813         memset(&params, 0, sizeof(params));
1814
1815         sdata->wmm_acm = 0;
1816         for (; left >= 4; left -= 4, pos += 4) {
1817                 int aci = (pos[0] >> 5) & 0x03;
1818                 int acm = (pos[0] >> 4) & 0x01;
1819                 bool uapsd = false;
1820
1821                 switch (aci) {
1822                 case 1: /* AC_BK */
1823                         ac = IEEE80211_AC_BK;
1824                         if (acm)
1825                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1826                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1827                                 uapsd = true;
1828                         break;
1829                 case 2: /* AC_VI */
1830                         ac = IEEE80211_AC_VI;
1831                         if (acm)
1832                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1833                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1834                                 uapsd = true;
1835                         break;
1836                 case 3: /* AC_VO */
1837                         ac = IEEE80211_AC_VO;
1838                         if (acm)
1839                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1840                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1841                                 uapsd = true;
1842                         break;
1843                 case 0: /* AC_BE */
1844                 default:
1845                         ac = IEEE80211_AC_BE;
1846                         if (acm)
1847                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1848                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1849                                 uapsd = true;
1850                         break;
1851                 }
1852
1853                 params[ac].aifs = pos[0] & 0x0f;
1854
1855                 if (params[ac].aifs < 2) {
1856                         sdata_info(sdata,
1857                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1858                                    params[ac].aifs, aci);
1859                         params[ac].aifs = 2;
1860                 }
1861                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1862                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1863                 params[ac].txop = get_unaligned_le16(pos + 2);
1864                 params[ac].acm = acm;
1865                 params[ac].uapsd = uapsd;
1866
1867                 if (params[ac].cw_min == 0 ||
1868                     params[ac].cw_min > params[ac].cw_max) {
1869                         sdata_info(sdata,
1870                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1871                                    params[ac].cw_min, params[ac].cw_max, aci);
1872                         return false;
1873                 }
1874         }
1875
1876         /* WMM specification requires all 4 ACIs. */
1877         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1878                 if (params[ac].cw_min == 0) {
1879                         sdata_info(sdata,
1880                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
1881                                    ac);
1882                         return false;
1883                 }
1884         }
1885
1886         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1887                 mlme_dbg(sdata,
1888                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1889                          ac, params[ac].acm,
1890                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1891                          params[ac].txop, params[ac].uapsd,
1892                          ifmgd->tx_tspec[ac].downgraded);
1893                 sdata->tx_conf[ac] = params[ac];
1894                 if (!ifmgd->tx_tspec[ac].downgraded &&
1895                     drv_conf_tx(local, sdata, ac, &params[ac]))
1896                         sdata_err(sdata,
1897                                   "failed to set TX queue parameters for AC %d\n",
1898                                   ac);
1899         }
1900
1901         /* enable WMM or activate new settings */
1902         sdata->vif.bss_conf.qos = true;
1903         return true;
1904 }
1905
1906 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1907 {
1908         lockdep_assert_held(&sdata->local->mtx);
1909
1910         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1911         ieee80211_run_deferred_scan(sdata->local);
1912 }
1913
1914 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1915 {
1916         mutex_lock(&sdata->local->mtx);
1917         __ieee80211_stop_poll(sdata);
1918         mutex_unlock(&sdata->local->mtx);
1919 }
1920
1921 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1922                                            u16 capab, bool erp_valid, u8 erp)
1923 {
1924         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1925         struct ieee80211_supported_band *sband;
1926         u32 changed = 0;
1927         bool use_protection;
1928         bool use_short_preamble;
1929         bool use_short_slot;
1930
1931         sband = ieee80211_get_sband(sdata);
1932         if (!sband)
1933                 return changed;
1934
1935         if (erp_valid) {
1936                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1937                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1938         } else {
1939                 use_protection = false;
1940                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1941         }
1942
1943         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1944         if (sband->band == NL80211_BAND_5GHZ)
1945                 use_short_slot = true;
1946
1947         if (use_protection != bss_conf->use_cts_prot) {
1948                 bss_conf->use_cts_prot = use_protection;
1949                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1950         }
1951
1952         if (use_short_preamble != bss_conf->use_short_preamble) {
1953                 bss_conf->use_short_preamble = use_short_preamble;
1954                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1955         }
1956
1957         if (use_short_slot != bss_conf->use_short_slot) {
1958                 bss_conf->use_short_slot = use_short_slot;
1959                 changed |= BSS_CHANGED_ERP_SLOT;
1960         }
1961
1962         return changed;
1963 }
1964
1965 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1966                                      struct cfg80211_bss *cbss,
1967                                      u32 bss_info_changed)
1968 {
1969         struct ieee80211_bss *bss = (void *)cbss->priv;
1970         struct ieee80211_local *local = sdata->local;
1971         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1972
1973         bss_info_changed |= BSS_CHANGED_ASSOC;
1974         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1975                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1976
1977         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1978                 beacon_loss_count * bss_conf->beacon_int));
1979
1980         sdata->u.mgd.associated = cbss;
1981         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1982
1983         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1984
1985         if (sdata->vif.p2p ||
1986             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1987                 const struct cfg80211_bss_ies *ies;
1988
1989                 rcu_read_lock();
1990                 ies = rcu_dereference(cbss->ies);
1991                 if (ies) {
1992                         int ret;
1993
1994                         ret = cfg80211_get_p2p_attr(
1995                                         ies->data, ies->len,
1996                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1997                                         (u8 *) &bss_conf->p2p_noa_attr,
1998                                         sizeof(bss_conf->p2p_noa_attr));
1999                         if (ret >= 2) {
2000                                 sdata->u.mgd.p2p_noa_index =
2001                                         bss_conf->p2p_noa_attr.index;
2002                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2003                         }
2004                 }
2005                 rcu_read_unlock();
2006         }
2007
2008         /* just to be sure */
2009         ieee80211_stop_poll(sdata);
2010
2011         ieee80211_led_assoc(local, 1);
2012
2013         if (sdata->u.mgd.have_beacon) {
2014                 /*
2015                  * If the AP is buggy we may get here with no DTIM period
2016                  * known, so assume it's 1 which is the only safe assumption
2017                  * in that case, although if the TIM IE is broken powersave
2018                  * probably just won't work at all.
2019                  */
2020                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2021                 bss_conf->beacon_rate = bss->beacon_rate;
2022                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2023         } else {
2024                 bss_conf->beacon_rate = NULL;
2025                 bss_conf->dtim_period = 0;
2026         }
2027
2028         bss_conf->assoc = 1;
2029
2030         /* Tell the driver to monitor connection quality (if supported) */
2031         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2032             bss_conf->cqm_rssi_thold)
2033                 bss_info_changed |= BSS_CHANGED_CQM;
2034
2035         /* Enable ARP filtering */
2036         if (bss_conf->arp_addr_cnt)
2037                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2038
2039         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2040
2041         mutex_lock(&local->iflist_mtx);
2042         ieee80211_recalc_ps(local);
2043         mutex_unlock(&local->iflist_mtx);
2044
2045         ieee80211_recalc_smps(sdata);
2046         ieee80211_recalc_ps_vif(sdata);
2047
2048         netif_carrier_on(sdata->dev);
2049 }
2050
2051 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2052                                    u16 stype, u16 reason, bool tx,
2053                                    u8 *frame_buf)
2054 {
2055         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2056         struct ieee80211_local *local = sdata->local;
2057         u32 changed = 0;
2058
2059         sdata_assert_lock(sdata);
2060
2061         if (WARN_ON_ONCE(tx && !frame_buf))
2062                 return;
2063
2064         if (WARN_ON(!ifmgd->associated))
2065                 return;
2066
2067         ieee80211_stop_poll(sdata);
2068
2069         ifmgd->associated = NULL;
2070         netif_carrier_off(sdata->dev);
2071
2072         /*
2073          * if we want to get out of ps before disassoc (why?) we have
2074          * to do it before sending disassoc, as otherwise the null-packet
2075          * won't be valid.
2076          */
2077         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2078                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2079                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2080         }
2081         local->ps_sdata = NULL;
2082
2083         /* disable per-vif ps */
2084         ieee80211_recalc_ps_vif(sdata);
2085
2086         /* make sure ongoing transmission finishes */
2087         synchronize_net();
2088
2089         /*
2090          * drop any frame before deauth/disassoc, this can be data or
2091          * management frame. Since we are disconnecting, we should not
2092          * insist sending these frames which can take time and delay
2093          * the disconnection and possible the roaming.
2094          */
2095         if (tx)
2096                 ieee80211_flush_queues(local, sdata, true);
2097
2098         /* deauthenticate/disassociate now */
2099         if (tx || frame_buf)
2100                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2101                                                reason, tx, frame_buf);
2102
2103         /* flush out frame - make sure the deauth was actually sent */
2104         if (tx)
2105                 ieee80211_flush_queues(local, sdata, false);
2106
2107         /* clear bssid only after building the needed mgmt frames */
2108         eth_zero_addr(ifmgd->bssid);
2109
2110         /* remove AP and TDLS peers */
2111         sta_info_flush(sdata);
2112
2113         /* finally reset all BSS / config parameters */
2114         changed |= ieee80211_reset_erp_info(sdata);
2115
2116         ieee80211_led_assoc(local, 0);
2117         changed |= BSS_CHANGED_ASSOC;
2118         sdata->vif.bss_conf.assoc = false;
2119
2120         ifmgd->p2p_noa_index = -1;
2121         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2122                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2123
2124         /* on the next assoc, re-program HT/VHT parameters */
2125         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2126         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2127         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2128         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2129
2130         /* reset MU-MIMO ownership and group data */
2131         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2132                sizeof(sdata->vif.bss_conf.mu_group.membership));
2133         memset(sdata->vif.bss_conf.mu_group.position, 0,
2134                sizeof(sdata->vif.bss_conf.mu_group.position));
2135         changed |= BSS_CHANGED_MU_GROUPS;
2136         sdata->vif.mu_mimo_owner = false;
2137
2138         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2139
2140         del_timer_sync(&local->dynamic_ps_timer);
2141         cancel_work_sync(&local->dynamic_ps_enable_work);
2142
2143         /* Disable ARP filtering */
2144         if (sdata->vif.bss_conf.arp_addr_cnt)
2145                 changed |= BSS_CHANGED_ARP_FILTER;
2146
2147         sdata->vif.bss_conf.qos = false;
2148         changed |= BSS_CHANGED_QOS;
2149
2150         /* The BSSID (not really interesting) and HT changed */
2151         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2152         ieee80211_bss_info_change_notify(sdata, changed);
2153
2154         /* disassociated - set to defaults now */
2155         ieee80211_set_wmm_default(sdata, false, false);
2156
2157         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2158         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2159         del_timer_sync(&sdata->u.mgd.timer);
2160         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2161
2162         sdata->vif.bss_conf.dtim_period = 0;
2163         sdata->vif.bss_conf.beacon_rate = NULL;
2164
2165         ifmgd->have_beacon = false;
2166
2167         ifmgd->flags = 0;
2168         mutex_lock(&local->mtx);
2169         ieee80211_vif_release_channel(sdata);
2170
2171         sdata->vif.csa_active = false;
2172         ifmgd->csa_waiting_bcn = false;
2173         ifmgd->csa_ignored_same_chan = false;
2174         if (sdata->csa_block_tx) {
2175                 ieee80211_wake_vif_queues(local, sdata,
2176                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2177                 sdata->csa_block_tx = false;
2178         }
2179         mutex_unlock(&local->mtx);
2180
2181         /* existing TX TSPEC sessions no longer exist */
2182         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2183         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2184
2185         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2186 }
2187
2188 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2189                              struct ieee80211_hdr *hdr)
2190 {
2191         /*
2192          * We can postpone the mgd.timer whenever receiving unicast frames
2193          * from AP because we know that the connection is working both ways
2194          * at that time. But multicast frames (and hence also beacons) must
2195          * be ignored here, because we need to trigger the timer during
2196          * data idle periods for sending the periodic probe request to the
2197          * AP we're connected to.
2198          */
2199         if (is_multicast_ether_addr(hdr->addr1))
2200                 return;
2201
2202         ieee80211_sta_reset_conn_monitor(sdata);
2203 }
2204
2205 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2206 {
2207         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2208         struct ieee80211_local *local = sdata->local;
2209
2210         mutex_lock(&local->mtx);
2211         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2212                 goto out;
2213
2214         __ieee80211_stop_poll(sdata);
2215
2216         mutex_lock(&local->iflist_mtx);
2217         ieee80211_recalc_ps(local);
2218         mutex_unlock(&local->iflist_mtx);
2219
2220         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2221                 goto out;
2222
2223         /*
2224          * We've received a probe response, but are not sure whether
2225          * we have or will be receiving any beacons or data, so let's
2226          * schedule the timers again, just in case.
2227          */
2228         ieee80211_sta_reset_beacon_monitor(sdata);
2229
2230         mod_timer(&ifmgd->conn_mon_timer,
2231                   round_jiffies_up(jiffies +
2232                                    IEEE80211_CONNECTION_IDLE_TIME));
2233 out:
2234         mutex_unlock(&local->mtx);
2235 }
2236
2237 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2238                                            struct ieee80211_hdr *hdr,
2239                                            u16 tx_time)
2240 {
2241         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2242         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2243         int ac = ieee80211_ac_from_tid(tid);
2244         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2245         unsigned long now = jiffies;
2246
2247         if (likely(!tx_tspec->admitted_time))
2248                 return;
2249
2250         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2251                 tx_tspec->consumed_tx_time = 0;
2252                 tx_tspec->time_slice_start = now;
2253
2254                 if (tx_tspec->downgraded) {
2255                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2256                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2257                 }
2258         }
2259
2260         if (tx_tspec->downgraded)
2261                 return;
2262
2263         tx_tspec->consumed_tx_time += tx_time;
2264
2265         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2266                 tx_tspec->downgraded = true;
2267                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2268                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2269         }
2270 }
2271
2272 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2273                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2274 {
2275         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2276
2277         if (!ieee80211_is_data(hdr->frame_control))
2278             return;
2279
2280         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2281             sdata->u.mgd.probe_send_count > 0) {
2282                 if (ack)
2283                         ieee80211_sta_reset_conn_monitor(sdata);
2284                 else
2285                         sdata->u.mgd.nullfunc_failed = true;
2286                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2287                 return;
2288         }
2289
2290         if (ack)
2291                 ieee80211_sta_reset_conn_monitor(sdata);
2292 }
2293
2294 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2295 {
2296         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2297         const u8 *ssid;
2298         u8 *dst = ifmgd->associated->bssid;
2299         u8 unicast_limit = max(1, max_probe_tries - 3);
2300         struct sta_info *sta;
2301
2302         /*
2303          * Try sending broadcast probe requests for the last three
2304          * probe requests after the first ones failed since some
2305          * buggy APs only support broadcast probe requests.
2306          */
2307         if (ifmgd->probe_send_count >= unicast_limit)
2308                 dst = NULL;
2309
2310         /*
2311          * When the hardware reports an accurate Tx ACK status, it's
2312          * better to send a nullfunc frame instead of a probe request,
2313          * as it will kick us off the AP quickly if we aren't associated
2314          * anymore. The timeout will be reset if the frame is ACKed by
2315          * the AP.
2316          */
2317         ifmgd->probe_send_count++;
2318
2319         if (dst) {
2320                 mutex_lock(&sdata->local->sta_mtx);
2321                 sta = sta_info_get(sdata, dst);
2322                 if (!WARN_ON(!sta))
2323                         ieee80211_check_fast_rx(sta);
2324                 mutex_unlock(&sdata->local->sta_mtx);
2325         }
2326
2327         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2328                 ifmgd->nullfunc_failed = false;
2329                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2330         } else {
2331                 int ssid_len;
2332
2333                 rcu_read_lock();
2334                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2335                 if (WARN_ON_ONCE(ssid == NULL))
2336                         ssid_len = 0;
2337                 else
2338                         ssid_len = ssid[1];
2339
2340                 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2341                                          ssid + 2, ssid_len, NULL,
2342                                          0, (u32) -1, true, 0,
2343                                          ifmgd->associated->channel, false);
2344                 rcu_read_unlock();
2345         }
2346
2347         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2348         run_again(sdata, ifmgd->probe_timeout);
2349 }
2350
2351 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2352                                    bool beacon)
2353 {
2354         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2355         bool already = false;
2356
2357         if (!ieee80211_sdata_running(sdata))
2358                 return;
2359
2360         sdata_lock(sdata);
2361
2362         if (!ifmgd->associated)
2363                 goto out;
2364
2365         mutex_lock(&sdata->local->mtx);
2366
2367         if (sdata->local->tmp_channel || sdata->local->scanning) {
2368                 mutex_unlock(&sdata->local->mtx);
2369                 goto out;
2370         }
2371
2372         if (beacon) {
2373                 mlme_dbg_ratelimited(sdata,
2374                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2375                                      beacon_loss_count);
2376
2377                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2378         }
2379
2380         /*
2381          * The driver/our work has already reported this event or the
2382          * connection monitoring has kicked in and we have already sent
2383          * a probe request. Or maybe the AP died and the driver keeps
2384          * reporting until we disassociate...
2385          *
2386          * In either case we have to ignore the current call to this
2387          * function (except for setting the correct probe reason bit)
2388          * because otherwise we would reset the timer every time and
2389          * never check whether we received a probe response!
2390          */
2391         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2392                 already = true;
2393
2394         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2395
2396         mutex_unlock(&sdata->local->mtx);
2397
2398         if (already)
2399                 goto out;
2400
2401         mutex_lock(&sdata->local->iflist_mtx);
2402         ieee80211_recalc_ps(sdata->local);
2403         mutex_unlock(&sdata->local->iflist_mtx);
2404
2405         ifmgd->probe_send_count = 0;
2406         ieee80211_mgd_probe_ap_send(sdata);
2407  out:
2408         sdata_unlock(sdata);
2409 }
2410
2411 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2412                                           struct ieee80211_vif *vif)
2413 {
2414         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2415         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2416         struct cfg80211_bss *cbss;
2417         struct sk_buff *skb;
2418         const u8 *ssid;
2419         int ssid_len;
2420
2421         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2422                 return NULL;
2423
2424         sdata_assert_lock(sdata);
2425
2426         if (ifmgd->associated)
2427                 cbss = ifmgd->associated;
2428         else if (ifmgd->auth_data)
2429                 cbss = ifmgd->auth_data->bss;
2430         else if (ifmgd->assoc_data)
2431                 cbss = ifmgd->assoc_data->bss;
2432         else
2433                 return NULL;
2434
2435         rcu_read_lock();
2436         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2437         if (WARN_ON_ONCE(ssid == NULL))
2438                 ssid_len = 0;
2439         else
2440                 ssid_len = ssid[1];
2441
2442         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2443                                         (u32) -1, cbss->channel,
2444                                         ssid + 2, ssid_len,
2445                                         NULL, 0, true);
2446         rcu_read_unlock();
2447
2448         return skb;
2449 }
2450 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2451
2452 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2453                                         const u8 *buf, size_t len, bool tx,
2454                                         u16 reason)
2455 {
2456         struct ieee80211_event event = {
2457                 .type = MLME_EVENT,
2458                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2459                 .u.mlme.reason = reason,
2460         };
2461
2462         if (tx)
2463                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2464         else
2465                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2466
2467         drv_event_callback(sdata->local, sdata, &event);
2468 }
2469
2470 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2471 {
2472         struct ieee80211_local *local = sdata->local;
2473         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2474         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2475         bool tx;
2476
2477         sdata_lock(sdata);
2478         if (!ifmgd->associated) {
2479                 sdata_unlock(sdata);
2480                 return;
2481         }
2482
2483         tx = !sdata->csa_block_tx;
2484
2485         /* AP is probably out of range (or not reachable for another reason) so
2486          * remove the bss struct for that AP.
2487          */
2488         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2489
2490         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2491                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2492                                tx, frame_buf);
2493         mutex_lock(&local->mtx);
2494         sdata->vif.csa_active = false;
2495         ifmgd->csa_waiting_bcn = false;
2496         if (sdata->csa_block_tx) {
2497                 ieee80211_wake_vif_queues(local, sdata,
2498                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2499                 sdata->csa_block_tx = false;
2500         }
2501         mutex_unlock(&local->mtx);
2502
2503         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2504                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2505
2506         sdata_unlock(sdata);
2507 }
2508
2509 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2510 {
2511         struct ieee80211_sub_if_data *sdata =
2512                 container_of(work, struct ieee80211_sub_if_data,
2513                              u.mgd.beacon_connection_loss_work);
2514         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2515
2516         if (ifmgd->associated)
2517                 ifmgd->beacon_loss_count++;
2518
2519         if (ifmgd->connection_loss) {
2520                 sdata_info(sdata, "Connection to AP %pM lost\n",
2521                            ifmgd->bssid);
2522                 __ieee80211_disconnect(sdata);
2523         } else {
2524                 ieee80211_mgd_probe_ap(sdata, true);
2525         }
2526 }
2527
2528 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2529 {
2530         struct ieee80211_sub_if_data *sdata =
2531                 container_of(work, struct ieee80211_sub_if_data,
2532                              u.mgd.csa_connection_drop_work);
2533
2534         __ieee80211_disconnect(sdata);
2535 }
2536
2537 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2538 {
2539         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2540         struct ieee80211_hw *hw = &sdata->local->hw;
2541
2542         trace_api_beacon_loss(sdata);
2543
2544         sdata->u.mgd.connection_loss = false;
2545         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2546 }
2547 EXPORT_SYMBOL(ieee80211_beacon_loss);
2548
2549 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2550 {
2551         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2552         struct ieee80211_hw *hw = &sdata->local->hw;
2553
2554         trace_api_connection_loss(sdata);
2555
2556         sdata->u.mgd.connection_loss = true;
2557         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2558 }
2559 EXPORT_SYMBOL(ieee80211_connection_loss);
2560
2561
2562 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2563                                         bool assoc)
2564 {
2565         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2566
2567         sdata_assert_lock(sdata);
2568
2569         if (!assoc) {
2570                 /*
2571                  * we are not authenticated yet, the only timer that could be
2572                  * running is the timeout for the authentication response which
2573                  * which is not relevant anymore.
2574                  */
2575                 del_timer_sync(&sdata->u.mgd.timer);
2576                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2577
2578                 eth_zero_addr(sdata->u.mgd.bssid);
2579                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2580                 sdata->u.mgd.flags = 0;
2581                 mutex_lock(&sdata->local->mtx);
2582                 ieee80211_vif_release_channel(sdata);
2583                 mutex_unlock(&sdata->local->mtx);
2584         }
2585
2586         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2587         kfree(auth_data);
2588         sdata->u.mgd.auth_data = NULL;
2589 }
2590
2591 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2592                                          bool assoc, bool abandon)
2593 {
2594         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2595
2596         sdata_assert_lock(sdata);
2597
2598         if (!assoc) {
2599                 /*
2600                  * we are not associated yet, the only timer that could be
2601                  * running is the timeout for the association response which
2602                  * which is not relevant anymore.
2603                  */
2604                 del_timer_sync(&sdata->u.mgd.timer);
2605                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2606
2607                 eth_zero_addr(sdata->u.mgd.bssid);
2608                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2609                 sdata->u.mgd.flags = 0;
2610                 sdata->vif.mu_mimo_owner = false;
2611
2612                 mutex_lock(&sdata->local->mtx);
2613                 ieee80211_vif_release_channel(sdata);
2614                 mutex_unlock(&sdata->local->mtx);
2615
2616                 if (abandon)
2617                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2618         }
2619
2620         kfree(assoc_data);
2621         sdata->u.mgd.assoc_data = NULL;
2622 }
2623
2624 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2625                                      struct ieee80211_mgmt *mgmt, size_t len)
2626 {
2627         struct ieee80211_local *local = sdata->local;
2628         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2629         u8 *pos;
2630         struct ieee802_11_elems elems;
2631         u32 tx_flags = 0;
2632
2633         pos = mgmt->u.auth.variable;
2634         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2635         if (!elems.challenge)
2636                 return;
2637         auth_data->expected_transaction = 4;
2638         drv_mgd_prepare_tx(sdata->local, sdata);
2639         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2640                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2641                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2642         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2643                             elems.challenge - 2, elems.challenge_len + 2,
2644                             auth_data->bss->bssid, auth_data->bss->bssid,
2645                             auth_data->key, auth_data->key_len,
2646                             auth_data->key_idx, tx_flags);
2647 }
2648
2649 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2650                                    struct ieee80211_mgmt *mgmt, size_t len)
2651 {
2652         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2653         u8 bssid[ETH_ALEN];
2654         u16 auth_alg, auth_transaction, status_code;
2655         struct sta_info *sta;
2656         struct ieee80211_event event = {
2657                 .type = MLME_EVENT,
2658                 .u.mlme.data = AUTH_EVENT,
2659         };
2660
2661         sdata_assert_lock(sdata);
2662
2663         if (len < 24 + 6)
2664                 return;
2665
2666         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2667                 return;
2668
2669         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2670
2671         if (!ether_addr_equal(bssid, mgmt->bssid))
2672                 return;
2673
2674         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2675         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2676         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2677
2678         if (auth_alg != ifmgd->auth_data->algorithm ||
2679             auth_transaction != ifmgd->auth_data->expected_transaction) {
2680                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2681                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2682                            auth_transaction,
2683                            ifmgd->auth_data->expected_transaction);
2684                 return;
2685         }
2686
2687         if (status_code != WLAN_STATUS_SUCCESS) {
2688                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2689                            mgmt->sa, status_code);
2690                 ieee80211_destroy_auth_data(sdata, false);
2691                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2692                 event.u.mlme.status = MLME_DENIED;
2693                 event.u.mlme.reason = status_code;
2694                 drv_event_callback(sdata->local, sdata, &event);
2695                 return;
2696         }
2697
2698         switch (ifmgd->auth_data->algorithm) {
2699         case WLAN_AUTH_OPEN:
2700         case WLAN_AUTH_LEAP:
2701         case WLAN_AUTH_FT:
2702         case WLAN_AUTH_SAE:
2703                 break;
2704         case WLAN_AUTH_SHARED_KEY:
2705                 if (ifmgd->auth_data->expected_transaction != 4) {
2706                         ieee80211_auth_challenge(sdata, mgmt, len);
2707                         /* need another frame */
2708                         return;
2709                 }
2710                 break;
2711         default:
2712                 WARN_ONCE(1, "invalid auth alg %d",
2713                           ifmgd->auth_data->algorithm);
2714                 return;
2715         }
2716
2717         event.u.mlme.status = MLME_SUCCESS;
2718         drv_event_callback(sdata->local, sdata, &event);
2719         sdata_info(sdata, "authenticated\n");
2720         ifmgd->auth_data->done = true;
2721         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2722         ifmgd->auth_data->timeout_started = true;
2723         run_again(sdata, ifmgd->auth_data->timeout);
2724
2725         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2726             ifmgd->auth_data->expected_transaction != 2) {
2727                 /*
2728                  * Report auth frame to user space for processing since another
2729                  * round of Authentication frames is still needed.
2730                  */
2731                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2732                 return;
2733         }
2734
2735         /* move station state to auth */
2736         mutex_lock(&sdata->local->sta_mtx);
2737         sta = sta_info_get(sdata, bssid);
2738         if (!sta) {
2739                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2740                 goto out_err;
2741         }
2742         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2743                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2744                 goto out_err;
2745         }
2746         mutex_unlock(&sdata->local->sta_mtx);
2747
2748         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2749         return;
2750  out_err:
2751         mutex_unlock(&sdata->local->sta_mtx);
2752         /* ignore frame -- wait for timeout */
2753 }
2754
2755 #define case_WLAN(type) \
2756         case WLAN_REASON_##type: return #type
2757
2758 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2759 {
2760         switch (reason_code) {
2761         case_WLAN(UNSPECIFIED);
2762         case_WLAN(PREV_AUTH_NOT_VALID);
2763         case_WLAN(DEAUTH_LEAVING);
2764         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2765         case_WLAN(DISASSOC_AP_BUSY);
2766         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2767         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2768         case_WLAN(DISASSOC_STA_HAS_LEFT);
2769         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2770         case_WLAN(DISASSOC_BAD_POWER);
2771         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2772         case_WLAN(INVALID_IE);
2773         case_WLAN(MIC_FAILURE);
2774         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2775         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2776         case_WLAN(IE_DIFFERENT);
2777         case_WLAN(INVALID_GROUP_CIPHER);
2778         case_WLAN(INVALID_PAIRWISE_CIPHER);
2779         case_WLAN(INVALID_AKMP);
2780         case_WLAN(UNSUPP_RSN_VERSION);
2781         case_WLAN(INVALID_RSN_IE_CAP);
2782         case_WLAN(IEEE8021X_FAILED);
2783         case_WLAN(CIPHER_SUITE_REJECTED);
2784         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2785         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2786         case_WLAN(DISASSOC_LOW_ACK);
2787         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2788         case_WLAN(QSTA_LEAVE_QBSS);
2789         case_WLAN(QSTA_NOT_USE);
2790         case_WLAN(QSTA_REQUIRE_SETUP);
2791         case_WLAN(QSTA_TIMEOUT);
2792         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2793         case_WLAN(MESH_PEER_CANCELED);
2794         case_WLAN(MESH_MAX_PEERS);
2795         case_WLAN(MESH_CONFIG);
2796         case_WLAN(MESH_CLOSE);
2797         case_WLAN(MESH_MAX_RETRIES);
2798         case_WLAN(MESH_CONFIRM_TIMEOUT);
2799         case_WLAN(MESH_INVALID_GTK);
2800         case_WLAN(MESH_INCONSISTENT_PARAM);
2801         case_WLAN(MESH_INVALID_SECURITY);
2802         case_WLAN(MESH_PATH_ERROR);
2803         case_WLAN(MESH_PATH_NOFORWARD);
2804         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2805         case_WLAN(MAC_EXISTS_IN_MBSS);
2806         case_WLAN(MESH_CHAN_REGULATORY);
2807         case_WLAN(MESH_CHAN);
2808         default: return "<unknown>";
2809         }
2810 }
2811
2812 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2813                                      struct ieee80211_mgmt *mgmt, size_t len)
2814 {
2815         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2816         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2817
2818         sdata_assert_lock(sdata);
2819
2820         if (len < 24 + 2)
2821                 return;
2822
2823         if (ifmgd->associated &&
2824             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2825                 const u8 *bssid = ifmgd->associated->bssid;
2826
2827                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2828                            bssid, reason_code,
2829                            ieee80211_get_reason_code_string(reason_code));
2830
2831                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2832
2833                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2834                                             reason_code);
2835                 return;
2836         }
2837
2838         if (ifmgd->assoc_data &&
2839             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2840                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2841
2842                 sdata_info(sdata,
2843                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2844                            bssid, reason_code,
2845                            ieee80211_get_reason_code_string(reason_code));
2846
2847                 ieee80211_destroy_assoc_data(sdata, false, true);
2848
2849                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2850                 return;
2851         }
2852 }
2853
2854
2855 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2856                                        struct ieee80211_mgmt *mgmt, size_t len)
2857 {
2858         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2859         u16 reason_code;
2860
2861         sdata_assert_lock(sdata);
2862
2863         if (len < 24 + 2)
2864                 return;
2865
2866         if (!ifmgd->associated ||
2867             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2868                 return;
2869
2870         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2871
2872         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2873                    mgmt->sa, reason_code);
2874
2875         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2876
2877         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2878 }
2879
2880 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2881                                 u8 *supp_rates, unsigned int supp_rates_len,
2882                                 u32 *rates, u32 *basic_rates,
2883                                 bool *have_higher_than_11mbit,
2884                                 int *min_rate, int *min_rate_index,
2885                                 int shift, u32 rate_flags)
2886 {
2887         int i, j;
2888
2889         for (i = 0; i < supp_rates_len; i++) {
2890                 int rate = supp_rates[i] & 0x7f;
2891                 bool is_basic = !!(supp_rates[i] & 0x80);
2892
2893                 if ((rate * 5 * (1 << shift)) > 110)
2894                         *have_higher_than_11mbit = true;
2895
2896                 /*
2897                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2898                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2899                  *
2900                  * Note: Even through the membership selector and the basic
2901                  *       rate flag share the same bit, they are not exactly
2902                  *       the same.
2903                  */
2904                 if (!!(supp_rates[i] & 0x80) &&
2905                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2906                         continue;
2907
2908                 for (j = 0; j < sband->n_bitrates; j++) {
2909                         struct ieee80211_rate *br;
2910                         int brate;
2911
2912                         br = &sband->bitrates[j];
2913                         if ((rate_flags & br->flags) != rate_flags)
2914                                 continue;
2915
2916                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2917                         if (brate == rate) {
2918                                 *rates |= BIT(j);
2919                                 if (is_basic)
2920                                         *basic_rates |= BIT(j);
2921                                 if ((rate * 5) < *min_rate) {
2922                                         *min_rate = rate * 5;
2923                                         *min_rate_index = j;
2924                                 }
2925                                 break;
2926                         }
2927                 }
2928         }
2929 }
2930
2931 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2932                                     struct cfg80211_bss *cbss,
2933                                     struct ieee80211_mgmt *mgmt, size_t len)
2934 {
2935         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2936         struct ieee80211_local *local = sdata->local;
2937         struct ieee80211_supported_band *sband;
2938         struct sta_info *sta;
2939         u8 *pos;
2940         u16 capab_info, aid;
2941         struct ieee802_11_elems elems;
2942         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2943         const struct cfg80211_bss_ies *bss_ies = NULL;
2944         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2945         u32 changed = 0;
2946         int err;
2947         bool ret;
2948
2949         /* AssocResp and ReassocResp have identical structure */
2950
2951         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2952         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2953
2954         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2955                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2956                            aid);
2957         aid &= ~(BIT(15) | BIT(14));
2958
2959         ifmgd->broken_ap = false;
2960
2961         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2962                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2963                            aid);
2964                 aid = 0;
2965                 ifmgd->broken_ap = true;
2966         }
2967
2968         pos = mgmt->u.assoc_resp.variable;
2969         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2970
2971         if (!elems.supp_rates) {
2972                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2973                 return false;
2974         }
2975
2976         ifmgd->aid = aid;
2977         ifmgd->tdls_chan_switch_prohibited =
2978                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2979                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2980
2981         /*
2982          * Some APs are erroneously not including some information in their
2983          * (re)association response frames. Try to recover by using the data
2984          * from the beacon or probe response. This seems to afflict mobile
2985          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2986          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2987          */
2988         if ((assoc_data->wmm && !elems.wmm_param) ||
2989             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2990              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2991             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2992              (!elems.vht_cap_elem || !elems.vht_operation))) {
2993                 const struct cfg80211_bss_ies *ies;
2994                 struct ieee802_11_elems bss_elems;
2995
2996                 rcu_read_lock();
2997                 ies = rcu_dereference(cbss->ies);
2998                 if (ies)
2999                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3000                                           GFP_ATOMIC);
3001                 rcu_read_unlock();
3002                 if (!bss_ies)
3003                         return false;
3004
3005                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3006                                        false, &bss_elems);
3007                 if (assoc_data->wmm &&
3008                     !elems.wmm_param && bss_elems.wmm_param) {
3009                         elems.wmm_param = bss_elems.wmm_param;
3010                         sdata_info(sdata,
3011                                    "AP bug: WMM param missing from AssocResp\n");
3012                 }
3013
3014                 /*
3015                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3016                  * have to include the IEs in the (re)association response.
3017                  */
3018                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3019                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3020                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
3021                         sdata_info(sdata,
3022                                    "AP bug: HT capability missing from AssocResp\n");
3023                 }
3024                 if (!elems.ht_operation && bss_elems.ht_operation &&
3025                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3026                         elems.ht_operation = bss_elems.ht_operation;
3027                         sdata_info(sdata,
3028                                    "AP bug: HT operation missing from AssocResp\n");
3029                 }
3030                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3031                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3032                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
3033                         sdata_info(sdata,
3034                                    "AP bug: VHT capa missing from AssocResp\n");
3035                 }
3036                 if (!elems.vht_operation && bss_elems.vht_operation &&
3037                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3038                         elems.vht_operation = bss_elems.vht_operation;
3039                         sdata_info(sdata,
3040                                    "AP bug: VHT operation missing from AssocResp\n");
3041                 }
3042         }
3043
3044         /*
3045          * We previously checked these in the beacon/probe response, so
3046          * they should be present here. This is just a safety net.
3047          */
3048         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3049             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3050                 sdata_info(sdata,
3051                            "HT AP is missing WMM params or HT capability/operation\n");
3052                 ret = false;
3053                 goto out;
3054         }
3055
3056         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3057             (!elems.vht_cap_elem || !elems.vht_operation)) {
3058                 sdata_info(sdata,
3059                            "VHT AP is missing VHT capability/operation\n");
3060                 ret = false;
3061                 goto out;
3062         }
3063
3064         mutex_lock(&sdata->local->sta_mtx);
3065         /*
3066          * station info was already allocated and inserted before
3067          * the association and should be available to us
3068          */
3069         sta = sta_info_get(sdata, cbss->bssid);
3070         if (WARN_ON(!sta)) {
3071                 mutex_unlock(&sdata->local->sta_mtx);
3072                 ret = false;
3073                 goto out;
3074         }
3075
3076         sband = ieee80211_get_sband(sdata);
3077         if (!sband) {
3078                 mutex_unlock(&sdata->local->sta_mtx);
3079                 ret = false;
3080                 goto out;
3081         }
3082
3083         /* Set up internal HT/VHT capabilities */
3084         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3085                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3086                                                   elems.ht_cap_elem, sta);
3087
3088         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3089                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3090                                                     elems.vht_cap_elem, sta);
3091
3092         /*
3093          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3094          * in their association response, so ignore that data for our own
3095          * configuration. If it changed since the last beacon, we'll get the
3096          * next beacon and update then.
3097          */
3098
3099         /*
3100          * If an operating mode notification IE is present, override the
3101          * NSS calculation (that would be done in rate_control_rate_init())
3102          * and use the # of streams from that element.
3103          */
3104         if (elems.opmode_notif &&
3105             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3106                 u8 nss;
3107
3108                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3109                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3110                 nss += 1;
3111                 sta->sta.rx_nss = nss;
3112         }
3113
3114         rate_control_rate_init(sta);
3115
3116         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3117                 set_sta_flag(sta, WLAN_STA_MFP);
3118                 sta->sta.mfp = true;
3119         } else {
3120                 sta->sta.mfp = false;
3121         }
3122
3123         sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3124
3125         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3126         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3127                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3128         if (err) {
3129                 sdata_info(sdata,
3130                            "failed to move station %pM to desired state\n",
3131                            sta->sta.addr);
3132                 WARN_ON(__sta_info_destroy(sta));
3133                 mutex_unlock(&sdata->local->sta_mtx);
3134                 ret = false;
3135                 goto out;
3136         }
3137
3138         mutex_unlock(&sdata->local->sta_mtx);
3139
3140         /*
3141          * Always handle WMM once after association regardless
3142          * of the first value the AP uses. Setting -1 here has
3143          * that effect because the AP values is an unsigned
3144          * 4-bit value.
3145          */
3146         ifmgd->wmm_last_param_set = -1;
3147
3148         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3149                 ieee80211_set_wmm_default(sdata, false, false);
3150         } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3151                                              elems.wmm_param_len)) {
3152                 /* still enable QoS since we might have HT/VHT */
3153                 ieee80211_set_wmm_default(sdata, false, true);
3154                 /* set the disable-WMM flag in this case to disable
3155                  * tracking WMM parameter changes in the beacon if
3156                  * the parameters weren't actually valid. Doing so
3157                  * avoids changing parameters very strangely when
3158                  * the AP is going back and forth between valid and
3159                  * invalid parameters.
3160                  */
3161                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3162         }
3163         changed |= BSS_CHANGED_QOS;
3164
3165         /* set AID and assoc capability,
3166          * ieee80211_set_associated() will tell the driver */
3167         bss_conf->aid = aid;
3168         bss_conf->assoc_capability = capab_info;
3169         ieee80211_set_associated(sdata, cbss, changed);
3170
3171         /*
3172          * If we're using 4-addr mode, let the AP know that we're
3173          * doing so, so that it can create the STA VLAN on its side
3174          */
3175         if (ifmgd->use_4addr)
3176                 ieee80211_send_4addr_nullfunc(local, sdata);
3177
3178         /*
3179          * Start timer to probe the connection to the AP now.
3180          * Also start the timer that will detect beacon loss.
3181          */
3182         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3183         ieee80211_sta_reset_beacon_monitor(sdata);
3184
3185         ret = true;
3186  out:
3187         kfree(bss_ies);
3188         return ret;
3189 }
3190
3191 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3192                                          struct ieee80211_mgmt *mgmt,
3193                                          size_t len)
3194 {
3195         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3196         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3197         u16 capab_info, status_code, aid;
3198         struct ieee802_11_elems elems;
3199         int ac, uapsd_queues = -1;
3200         u8 *pos;
3201         bool reassoc;
3202         struct cfg80211_bss *bss;
3203         struct ieee80211_event event = {
3204                 .type = MLME_EVENT,
3205                 .u.mlme.data = ASSOC_EVENT,
3206         };
3207
3208         sdata_assert_lock(sdata);
3209
3210         if (!assoc_data)
3211                 return;
3212         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3213                 return;
3214
3215         /*
3216          * AssocResp and ReassocResp have identical structure, so process both
3217          * of them in this function.
3218          */
3219
3220         if (len < 24 + 6)
3221                 return;
3222
3223         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3224         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3225         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3226         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3227
3228         sdata_info(sdata,
3229                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3230                    reassoc ? "Rea" : "A", mgmt->sa,
3231                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3232
3233         pos = mgmt->u.assoc_resp.variable;
3234         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3235
3236         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3237             elems.timeout_int &&
3238             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3239                 u32 tu, ms;
3240                 tu = le32_to_cpu(elems.timeout_int->value);
3241                 ms = tu * 1024 / 1000;
3242                 sdata_info(sdata,
3243                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3244                            mgmt->sa, tu, ms);
3245                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3246                 assoc_data->timeout_started = true;
3247                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3248                         run_again(sdata, assoc_data->timeout);
3249                 return;
3250         }
3251
3252         bss = assoc_data->bss;
3253
3254         if (status_code != WLAN_STATUS_SUCCESS) {
3255                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3256                            mgmt->sa, status_code);
3257                 ieee80211_destroy_assoc_data(sdata, false, false);
3258                 event.u.mlme.status = MLME_DENIED;
3259                 event.u.mlme.reason = status_code;
3260                 drv_event_callback(sdata->local, sdata, &event);
3261         } else {
3262                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3263                         /* oops -- internal error -- send timeout for now */
3264                         ieee80211_destroy_assoc_data(sdata, false, false);
3265                         cfg80211_assoc_timeout(sdata->dev, bss);
3266                         return;
3267                 }
3268                 event.u.mlme.status = MLME_SUCCESS;
3269                 drv_event_callback(sdata->local, sdata, &event);
3270                 sdata_info(sdata, "associated\n");
3271
3272                 /*
3273                  * destroy assoc_data afterwards, as otherwise an idle
3274                  * recalc after assoc_data is NULL but before associated
3275                  * is set can cause the interface to go idle
3276                  */
3277                 ieee80211_destroy_assoc_data(sdata, true, false);
3278
3279                 /* get uapsd queues configuration */
3280                 uapsd_queues = 0;
3281                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3282                         if (sdata->tx_conf[ac].uapsd)
3283                                 uapsd_queues |= BIT(ac);
3284         }
3285
3286         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3287 }
3288
3289 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3290                                   struct ieee80211_mgmt *mgmt, size_t len,
3291                                   struct ieee80211_rx_status *rx_status,
3292                                   struct ieee802_11_elems *elems)
3293 {
3294         struct ieee80211_local *local = sdata->local;
3295         struct ieee80211_bss *bss;
3296         struct ieee80211_channel *channel;
3297
3298         sdata_assert_lock(sdata);
3299
3300         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3301         if (!channel)
3302                 return;
3303
3304         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3305                                         channel);
3306         if (bss) {
3307                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3308                 ieee80211_rx_bss_put(local, bss);
3309         }
3310 }
3311
3312
3313 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3314                                          struct sk_buff *skb)
3315 {
3316         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3317         struct ieee80211_if_managed *ifmgd;
3318         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3319         size_t baselen, len = skb->len;
3320         struct ieee802_11_elems elems;
3321
3322         ifmgd = &sdata->u.mgd;
3323
3324         sdata_assert_lock(sdata);
3325
3326         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3327                 return; /* ignore ProbeResp to foreign address */
3328
3329         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3330         if (baselen > len)
3331                 return;
3332
3333         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3334                                false, &elems);
3335
3336         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3337
3338         if (ifmgd->associated &&
3339             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3340                 ieee80211_reset_ap_probe(sdata);
3341 }
3342
3343 /*
3344  * This is the canonical list of information elements we care about,
3345  * the filter code also gives us all changes to the Microsoft OUI
3346  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3347  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3348  * changes to requested client power.
3349  *
3350  * We implement beacon filtering in software since that means we can
3351  * avoid processing the frame here and in cfg80211, and userspace
3352  * will not be able to tell whether the hardware supports it or not.
3353  *
3354  * XXX: This list needs to be dynamic -- userspace needs to be able to
3355  *      add items it requires. It also needs to be able to tell us to
3356  *      look out for other vendor IEs.
3357  */
3358 static const u64 care_about_ies =
3359         (1ULL << WLAN_EID_COUNTRY) |
3360         (1ULL << WLAN_EID_ERP_INFO) |
3361         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3362         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3363         (1ULL << WLAN_EID_HT_CAPABILITY) |
3364         (1ULL << WLAN_EID_HT_OPERATION) |
3365         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3366
3367 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3368                                      struct ieee80211_mgmt *mgmt, size_t len,
3369                                      struct ieee80211_rx_status *rx_status)
3370 {
3371         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3372         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3373         size_t baselen;
3374         struct ieee802_11_elems elems;
3375         struct ieee80211_local *local = sdata->local;
3376         struct ieee80211_chanctx_conf *chanctx_conf;
3377         struct ieee80211_channel *chan;
3378         struct sta_info *sta;
3379         u32 changed = 0;
3380         bool erp_valid;
3381         u8 erp_value = 0;
3382         u32 ncrc;
3383         u8 *bssid;
3384         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3385
3386         sdata_assert_lock(sdata);
3387
3388         /* Process beacon from the current BSS */
3389         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3390         if (baselen > len)
3391                 return;
3392
3393         rcu_read_lock();
3394         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3395         if (!chanctx_conf) {
3396                 rcu_read_unlock();
3397                 return;
3398         }
3399
3400         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3401                 rcu_read_unlock();
3402                 return;
3403         }
3404         chan = chanctx_conf->def.chan;
3405         rcu_read_unlock();
3406
3407         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3408             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3409                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3410                                        len - baselen, false, &elems);
3411
3412                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3413                 if (elems.tim && !elems.parse_error) {
3414                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3415                         ifmgd->dtim_period = tim_ie->dtim_period;
3416                 }
3417                 ifmgd->have_beacon = true;
3418                 ifmgd->assoc_data->need_beacon = false;
3419                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3420                         sdata->vif.bss_conf.sync_tsf =
3421                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3422                         sdata->vif.bss_conf.sync_device_ts =
3423                                 rx_status->device_timestamp;
3424                         if (elems.tim)
3425                                 sdata->vif.bss_conf.sync_dtim_count =
3426                                         elems.tim->dtim_count;
3427                         else
3428                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3429                 }
3430                 /* continue assoc process */
3431                 ifmgd->assoc_data->timeout = jiffies;
3432                 ifmgd->assoc_data->timeout_started = true;
3433                 run_again(sdata, ifmgd->assoc_data->timeout);
3434                 return;
3435         }
3436
3437         if (!ifmgd->associated ||
3438             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3439                 return;
3440         bssid = ifmgd->associated->bssid;
3441
3442         /* Track average RSSI from the Beacon frames of the current AP */
3443         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3444                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3445                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3446                 ifmgd->last_cqm_event_signal = 0;
3447                 ifmgd->count_beacon_signal = 1;
3448                 ifmgd->last_ave_beacon_signal = 0;
3449         } else {
3450                 ifmgd->count_beacon_signal++;
3451         }
3452
3453         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3454
3455         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3456             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3457                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3458                 int last_sig = ifmgd->last_ave_beacon_signal;
3459                 struct ieee80211_event event = {
3460                         .type = RSSI_EVENT,
3461                 };
3462
3463                 /*
3464                  * if signal crosses either of the boundaries, invoke callback
3465                  * with appropriate parameters
3466                  */
3467                 if (sig > ifmgd->rssi_max_thold &&
3468                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3469                         ifmgd->last_ave_beacon_signal = sig;
3470                         event.u.rssi.data = RSSI_EVENT_HIGH;
3471                         drv_event_callback(local, sdata, &event);
3472                 } else if (sig < ifmgd->rssi_min_thold &&
3473                            (last_sig >= ifmgd->rssi_max_thold ||
3474                            last_sig == 0)) {
3475                         ifmgd->last_ave_beacon_signal = sig;
3476                         event.u.rssi.data = RSSI_EVENT_LOW;
3477                         drv_event_callback(local, sdata, &event);
3478                 }
3479         }
3480
3481         if (bss_conf->cqm_rssi_thold &&
3482             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3483             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3484                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3485                 int last_event = ifmgd->last_cqm_event_signal;
3486                 int thold = bss_conf->cqm_rssi_thold;
3487                 int hyst = bss_conf->cqm_rssi_hyst;
3488
3489                 if (sig < thold &&
3490                     (last_event == 0 || sig < last_event - hyst)) {
3491                         ifmgd->last_cqm_event_signal = sig;
3492                         ieee80211_cqm_rssi_notify(
3493                                 &sdata->vif,
3494                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3495                                 GFP_KERNEL);
3496                 } else if (sig > thold &&
3497                            (last_event == 0 || sig > last_event + hyst)) {
3498                         ifmgd->last_cqm_event_signal = sig;
3499                         ieee80211_cqm_rssi_notify(
3500                                 &sdata->vif,
3501                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3502                                 GFP_KERNEL);
3503                 }
3504         }
3505
3506         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3507                 mlme_dbg_ratelimited(sdata,
3508                                      "cancelling AP probe due to a received beacon\n");
3509                 ieee80211_reset_ap_probe(sdata);
3510         }
3511
3512         /*
3513          * Push the beacon loss detection into the future since
3514          * we are processing a beacon from the AP just now.
3515          */
3516         ieee80211_sta_reset_beacon_monitor(sdata);
3517
3518         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3519         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3520                                           len - baselen, false, &elems,
3521                                           care_about_ies, ncrc);
3522
3523         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3524             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3525                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3526                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3527                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3528                                 ieee80211_hw_config(local,
3529                                                     IEEE80211_CONF_CHANGE_PS);
3530                         }
3531                         ieee80211_send_nullfunc(local, sdata, false);
3532                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3533                         local->pspolling = true;
3534
3535                         /*
3536                          * Here is assumed that the driver will be
3537                          * able to send ps-poll frame and receive a
3538                          * response even though power save mode is
3539                          * enabled, but some drivers might require
3540                          * to disable power save here. This needs
3541                          * to be investigated.
3542                          */
3543                         ieee80211_send_pspoll(local, sdata);
3544                 }
3545         }
3546
3547         if (sdata->vif.p2p ||
3548             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3549                 struct ieee80211_p2p_noa_attr noa = {};
3550                 int ret;
3551
3552                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3553                                             len - baselen,
3554                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3555                                             (u8 *) &noa, sizeof(noa));
3556                 if (ret >= 2) {
3557                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3558                                 /* valid noa_attr and index changed */
3559                                 sdata->u.mgd.p2p_noa_index = noa.index;
3560                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3561                                 changed |= BSS_CHANGED_P2P_PS;
3562                                 /*
3563                                  * make sure we update all information, the CRC
3564                                  * mechanism doesn't look at P2P attributes.
3565                                  */
3566                                 ifmgd->beacon_crc_valid = false;
3567                         }
3568                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3569                         /* noa_attr not found and we had valid noa_attr before */
3570                         sdata->u.mgd.p2p_noa_index = -1;
3571                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3572                         changed |= BSS_CHANGED_P2P_PS;
3573                         ifmgd->beacon_crc_valid = false;
3574                 }
3575         }
3576
3577         if (ifmgd->csa_waiting_bcn)
3578                 ieee80211_chswitch_post_beacon(sdata);
3579
3580         /*
3581          * Update beacon timing and dtim count on every beacon appearance. This
3582          * will allow the driver to use the most updated values. Do it before
3583          * comparing this one with last received beacon.
3584          * IMPORTANT: These parameters would possibly be out of sync by the time
3585          * the driver will use them. The synchronized view is currently
3586          * guaranteed only in certain callbacks.
3587          */
3588         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3589                 sdata->vif.bss_conf.sync_tsf =
3590                         le64_to_cpu(mgmt->u.beacon.timestamp);
3591                 sdata->vif.bss_conf.sync_device_ts =
3592                         rx_status->device_timestamp;
3593                 if (elems.tim)
3594                         sdata->vif.bss_conf.sync_dtim_count =
3595                                 elems.tim->dtim_count;
3596                 else
3597                         sdata->vif.bss_conf.sync_dtim_count = 0;
3598         }
3599
3600         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3601                 return;
3602         ifmgd->beacon_crc = ncrc;
3603         ifmgd->beacon_crc_valid = true;
3604
3605         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3606
3607         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3608                                          rx_status->device_timestamp,
3609                                          &elems, true);
3610
3611         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3612             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3613                                      elems.wmm_param_len))
3614                 changed |= BSS_CHANGED_QOS;
3615
3616         /*
3617          * If we haven't had a beacon before, tell the driver about the
3618          * DTIM period (and beacon timing if desired) now.
3619          */
3620         if (!ifmgd->have_beacon) {
3621                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3622                 if (elems.tim)
3623                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3624                 else
3625                         bss_conf->dtim_period = 1;
3626
3627                 changed |= BSS_CHANGED_BEACON_INFO;
3628                 ifmgd->have_beacon = true;
3629
3630                 mutex_lock(&local->iflist_mtx);
3631                 ieee80211_recalc_ps(local);
3632                 mutex_unlock(&local->iflist_mtx);
3633
3634                 ieee80211_recalc_ps_vif(sdata);
3635         }
3636
3637         if (elems.erp_info) {
3638                 erp_valid = true;
3639                 erp_value = elems.erp_info[0];
3640         } else {
3641                 erp_valid = false;
3642         }
3643         changed |= ieee80211_handle_bss_capability(sdata,
3644                         le16_to_cpu(mgmt->u.beacon.capab_info),
3645                         erp_valid, erp_value);
3646
3647         mutex_lock(&local->sta_mtx);
3648         sta = sta_info_get(sdata, bssid);
3649
3650         if (ieee80211_config_bw(sdata, sta,
3651                                 elems.ht_cap_elem, elems.ht_operation,
3652                                 elems.vht_operation, bssid, &changed)) {
3653                 mutex_unlock(&local->sta_mtx);
3654                 sdata_info(sdata,
3655                            "failed to follow AP %pM bandwidth change, disconnect\n",
3656                            bssid);
3657                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3658                                        WLAN_REASON_DEAUTH_LEAVING,
3659                                        true, deauth_buf);
3660                 ieee80211_report_disconnect(sdata, deauth_buf,
3661                                             sizeof(deauth_buf), true,
3662                                             WLAN_REASON_DEAUTH_LEAVING);
3663                 return;
3664         }
3665
3666         if (sta && elems.opmode_notif)
3667                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3668                                             rx_status->band);
3669         mutex_unlock(&local->sta_mtx);
3670
3671         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3672                                                elems.country_elem,
3673                                                elems.country_elem_len,
3674                                                elems.pwr_constr_elem,
3675                                                elems.cisco_dtpc_elem);
3676
3677         ieee80211_bss_info_change_notify(sdata, changed);
3678 }
3679
3680 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3681                                   struct sk_buff *skb)
3682 {
3683         struct ieee80211_rx_status *rx_status;
3684         struct ieee80211_mgmt *mgmt;
3685         u16 fc;
3686         struct ieee802_11_elems elems;
3687         int ies_len;
3688
3689         rx_status = (struct ieee80211_rx_status *) skb->cb;
3690         mgmt = (struct ieee80211_mgmt *) skb->data;
3691         fc = le16_to_cpu(mgmt->frame_control);
3692
3693         sdata_lock(sdata);
3694
3695         switch (fc & IEEE80211_FCTL_STYPE) {
3696         case IEEE80211_STYPE_BEACON:
3697                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3698                 break;
3699         case IEEE80211_STYPE_PROBE_RESP:
3700                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3701                 break;
3702         case IEEE80211_STYPE_AUTH:
3703                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3704                 break;
3705         case IEEE80211_STYPE_DEAUTH:
3706                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3707                 break;
3708         case IEEE80211_STYPE_DISASSOC:
3709                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3710                 break;
3711         case IEEE80211_STYPE_ASSOC_RESP:
3712         case IEEE80211_STYPE_REASSOC_RESP:
3713                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3714                 break;
3715         case IEEE80211_STYPE_ACTION:
3716                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3717                         ies_len = skb->len -
3718                                   offsetof(struct ieee80211_mgmt,
3719                                            u.action.u.chan_switch.variable);
3720
3721                         if (ies_len < 0)
3722                                 break;
3723
3724                         ieee802_11_parse_elems(
3725                                 mgmt->u.action.u.chan_switch.variable,
3726                                 ies_len, true, &elems);
3727
3728                         if (elems.parse_error)
3729                                 break;
3730
3731                         ieee80211_sta_process_chanswitch(sdata,
3732                                                  rx_status->mactime,
3733                                                  rx_status->device_timestamp,
3734                                                  &elems, false);
3735                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3736                         ies_len = skb->len -
3737                                   offsetof(struct ieee80211_mgmt,
3738                                            u.action.u.ext_chan_switch.variable);
3739
3740                         if (ies_len < 0)
3741                                 break;
3742
3743                         ieee802_11_parse_elems(
3744                                 mgmt->u.action.u.ext_chan_switch.variable,
3745                                 ies_len, true, &elems);
3746
3747                         if (elems.parse_error)
3748                                 break;
3749
3750                         /* for the handling code pretend this was also an IE */
3751                         elems.ext_chansw_ie =
3752                                 &mgmt->u.action.u.ext_chan_switch.data;
3753
3754                         ieee80211_sta_process_chanswitch(sdata,
3755                                                  rx_status->mactime,
3756                                                  rx_status->device_timestamp,
3757                                                  &elems, false);
3758                 }
3759                 break;
3760         }
3761         sdata_unlock(sdata);
3762 }
3763
3764 static void ieee80211_sta_timer(unsigned long data)
3765 {
3766         struct ieee80211_sub_if_data *sdata =
3767                 (struct ieee80211_sub_if_data *) data;
3768
3769         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3770 }
3771
3772 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3773                                           u8 *bssid, u8 reason, bool tx)
3774 {
3775         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3776
3777         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3778                                tx, frame_buf);
3779
3780         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3781                                     reason);
3782 }
3783
3784 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3785 {
3786         struct ieee80211_local *local = sdata->local;
3787         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3788         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3789         u32 tx_flags = 0;
3790         u16 trans = 1;
3791         u16 status = 0;
3792
3793         sdata_assert_lock(sdata);
3794
3795         if (WARN_ON_ONCE(!auth_data))
3796                 return -EINVAL;
3797
3798         auth_data->tries++;
3799
3800         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3801                 sdata_info(sdata, "authentication with %pM timed out\n",
3802                            auth_data->bss->bssid);
3803
3804                 /*
3805                  * Most likely AP is not in the range so remove the
3806                  * bss struct for that AP.
3807                  */
3808                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3809
3810                 return -ETIMEDOUT;
3811         }
3812
3813         drv_mgd_prepare_tx(local, sdata);
3814
3815         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3816                    auth_data->bss->bssid, auth_data->tries,
3817                    IEEE80211_AUTH_MAX_TRIES);
3818
3819         auth_data->expected_transaction = 2;
3820
3821         if (auth_data->algorithm == WLAN_AUTH_SAE) {
3822                 trans = auth_data->sae_trans;
3823                 status = auth_data->sae_status;
3824                 auth_data->expected_transaction = trans;
3825         }
3826
3827         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3828                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3829                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3830
3831         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3832                             auth_data->data, auth_data->data_len,
3833                             auth_data->bss->bssid,
3834                             auth_data->bss->bssid, NULL, 0, 0,
3835                             tx_flags);
3836
3837         if (tx_flags == 0) {
3838                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3839                 auth_data->timeout_started = true;
3840                 run_again(sdata, auth_data->timeout);
3841         } else {
3842                 auth_data->timeout =
3843                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3844                 auth_data->timeout_started = true;
3845                 run_again(sdata, auth_data->timeout);
3846         }
3847
3848         return 0;
3849 }
3850
3851 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3852 {
3853         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3854         struct ieee80211_local *local = sdata->local;
3855
3856         sdata_assert_lock(sdata);
3857
3858         assoc_data->tries++;
3859         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3860                 sdata_info(sdata, "association with %pM timed out\n",
3861                            assoc_data->bss->bssid);
3862
3863                 /*
3864                  * Most likely AP is not in the range so remove the
3865                  * bss struct for that AP.
3866                  */
3867                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3868
3869                 return -ETIMEDOUT;
3870         }
3871
3872         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3873                    assoc_data->bss->bssid, assoc_data->tries,
3874                    IEEE80211_ASSOC_MAX_TRIES);
3875         ieee80211_send_assoc(sdata);
3876
3877         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3878                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3879                 assoc_data->timeout_started = true;
3880                 run_again(sdata, assoc_data->timeout);
3881         } else {
3882                 assoc_data->timeout =
3883                         round_jiffies_up(jiffies +
3884                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3885                 assoc_data->timeout_started = true;
3886                 run_again(sdata, assoc_data->timeout);
3887         }
3888
3889         return 0;
3890 }
3891
3892 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3893                                   __le16 fc, bool acked)
3894 {
3895         struct ieee80211_local *local = sdata->local;
3896
3897         sdata->u.mgd.status_fc = fc;
3898         sdata->u.mgd.status_acked = acked;
3899         sdata->u.mgd.status_received = true;
3900
3901         ieee80211_queue_work(&local->hw, &sdata->work);
3902 }
3903
3904 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3905 {
3906         struct ieee80211_local *local = sdata->local;
3907         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3908
3909         sdata_lock(sdata);
3910
3911         if (ifmgd->status_received) {
3912                 __le16 fc = ifmgd->status_fc;
3913                 bool status_acked = ifmgd->status_acked;
3914
3915                 ifmgd->status_received = false;
3916                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3917                         if (status_acked) {
3918                                 ifmgd->auth_data->timeout =
3919                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3920                                 run_again(sdata, ifmgd->auth_data->timeout);
3921                         } else {
3922                                 ifmgd->auth_data->timeout = jiffies - 1;
3923                         }
3924                         ifmgd->auth_data->timeout_started = true;
3925                 } else if (ifmgd->assoc_data &&
3926                            (ieee80211_is_assoc_req(fc) ||
3927                             ieee80211_is_reassoc_req(fc))) {
3928                         if (status_acked) {
3929                                 ifmgd->assoc_data->timeout =
3930                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3931                                 run_again(sdata, ifmgd->assoc_data->timeout);
3932                         } else {
3933                                 ifmgd->assoc_data->timeout = jiffies - 1;
3934                         }
3935                         ifmgd->assoc_data->timeout_started = true;
3936                 }
3937         }
3938
3939         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3940             time_after(jiffies, ifmgd->auth_data->timeout)) {
3941                 if (ifmgd->auth_data->done) {
3942                         /*
3943                          * ok ... we waited for assoc but userspace didn't,
3944                          * so let's just kill the auth data
3945                          */
3946                         ieee80211_destroy_auth_data(sdata, false);
3947                 } else if (ieee80211_auth(sdata)) {
3948                         u8 bssid[ETH_ALEN];
3949                         struct ieee80211_event event = {
3950                                 .type = MLME_EVENT,
3951                                 .u.mlme.data = AUTH_EVENT,
3952                                 .u.mlme.status = MLME_TIMEOUT,
3953                         };
3954
3955                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3956
3957                         ieee80211_destroy_auth_data(sdata, false);
3958
3959                         cfg80211_auth_timeout(sdata->dev, bssid);
3960                         drv_event_callback(sdata->local, sdata, &event);
3961                 }
3962         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3963                 run_again(sdata, ifmgd->auth_data->timeout);
3964
3965         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3966             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3967                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3968                     ieee80211_do_assoc(sdata)) {
3969                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3970                         struct ieee80211_event event = {
3971                                 .type = MLME_EVENT,
3972                                 .u.mlme.data = ASSOC_EVENT,
3973                                 .u.mlme.status = MLME_TIMEOUT,
3974                         };
3975
3976                         ieee80211_destroy_assoc_data(sdata, false, false);
3977                         cfg80211_assoc_timeout(sdata->dev, bss);
3978                         drv_event_callback(sdata->local, sdata, &event);
3979                 }
3980         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3981                 run_again(sdata, ifmgd->assoc_data->timeout);
3982
3983         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3984             ifmgd->associated) {
3985                 u8 bssid[ETH_ALEN];
3986                 int max_tries;
3987
3988                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3989
3990                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3991                         max_tries = max_nullfunc_tries;
3992                 else
3993                         max_tries = max_probe_tries;
3994
3995                 /* ACK received for nullfunc probing frame */
3996                 if (!ifmgd->probe_send_count)
3997                         ieee80211_reset_ap_probe(sdata);
3998                 else if (ifmgd->nullfunc_failed) {
3999                         if (ifmgd->probe_send_count < max_tries) {
4000                                 mlme_dbg(sdata,
4001                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4002                                          bssid, ifmgd->probe_send_count,
4003                                          max_tries);
4004                                 ieee80211_mgd_probe_ap_send(sdata);
4005                         } else {
4006                                 mlme_dbg(sdata,
4007                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4008                                          bssid);
4009                                 ieee80211_sta_connection_lost(sdata, bssid,
4010                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4011                                         false);
4012                         }
4013                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4014                         run_again(sdata, ifmgd->probe_timeout);
4015                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4016                         mlme_dbg(sdata,
4017                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4018                                  bssid, probe_wait_ms);
4019                         ieee80211_sta_connection_lost(sdata, bssid,
4020                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4021                 } else if (ifmgd->probe_send_count < max_tries) {
4022                         mlme_dbg(sdata,
4023                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4024                                  bssid, probe_wait_ms,
4025                                  ifmgd->probe_send_count, max_tries);
4026                         ieee80211_mgd_probe_ap_send(sdata);
4027                 } else {
4028                         /*
4029                          * We actually lost the connection ... or did we?
4030                          * Let's make sure!
4031                          */
4032                         mlme_dbg(sdata,
4033                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4034                                  bssid, probe_wait_ms);
4035
4036                         ieee80211_sta_connection_lost(sdata, bssid,
4037                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4038                 }
4039         }
4040
4041         sdata_unlock(sdata);
4042 }
4043
4044 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4045 {
4046         struct ieee80211_sub_if_data *sdata =
4047                 (struct ieee80211_sub_if_data *) data;
4048         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4049
4050         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4051                 return;
4052
4053         sdata->u.mgd.connection_loss = false;
4054         ieee80211_queue_work(&sdata->local->hw,
4055                              &sdata->u.mgd.beacon_connection_loss_work);
4056 }
4057
4058 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4059 {
4060         struct ieee80211_sub_if_data *sdata =
4061                 (struct ieee80211_sub_if_data *) data;
4062         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4063         struct ieee80211_local *local = sdata->local;
4064
4065         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4066                 return;
4067
4068         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4069 }
4070
4071 static void ieee80211_sta_monitor_work(struct work_struct *work)
4072 {
4073         struct ieee80211_sub_if_data *sdata =
4074                 container_of(work, struct ieee80211_sub_if_data,
4075                              u.mgd.monitor_work);
4076
4077         ieee80211_mgd_probe_ap(sdata, false);
4078 }
4079
4080 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4081 {
4082         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4083                 __ieee80211_stop_poll(sdata);
4084
4085                 /* let's probe the connection once */
4086                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4087                         ieee80211_queue_work(&sdata->local->hw,
4088                                              &sdata->u.mgd.monitor_work);
4089         }
4090 }
4091
4092 #ifdef CONFIG_PM
4093 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4094 {
4095         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4096         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4097
4098         sdata_lock(sdata);
4099
4100         if (ifmgd->auth_data || ifmgd->assoc_data) {
4101                 const u8 *bssid = ifmgd->auth_data ?
4102                                 ifmgd->auth_data->bss->bssid :
4103                                 ifmgd->assoc_data->bss->bssid;
4104
4105                 /*
4106                  * If we are trying to authenticate / associate while suspending,
4107                  * cfg80211 won't know and won't actually abort those attempts,
4108                  * thus we need to do that ourselves.
4109                  */
4110                 ieee80211_send_deauth_disassoc(sdata, bssid,
4111                                                IEEE80211_STYPE_DEAUTH,
4112                                                WLAN_REASON_DEAUTH_LEAVING,
4113                                                false, frame_buf);
4114                 if (ifmgd->assoc_data)
4115                         ieee80211_destroy_assoc_data(sdata, false, true);
4116                 if (ifmgd->auth_data)
4117                         ieee80211_destroy_auth_data(sdata, false);
4118                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4119                                       IEEE80211_DEAUTH_FRAME_LEN);
4120         }
4121
4122         /* This is a bit of a hack - we should find a better and more generic
4123          * solution to this. Normally when suspending, cfg80211 will in fact
4124          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4125          * auth (not so important) or assoc (this is the problem) process.
4126          *
4127          * As a consequence, it can happen that we are in the process of both
4128          * associating and suspending, and receive an association response
4129          * after cfg80211 has checked if it needs to disconnect, but before
4130          * we actually set the flag to drop incoming frames. This will then
4131          * cause the workqueue flush to process the association response in
4132          * the suspend, resulting in a successful association just before it
4133          * tries to remove the interface from the driver, which now though
4134          * has a channel context assigned ... this results in issues.
4135          *
4136          * To work around this (for now) simply deauth here again if we're
4137          * now connected.
4138          */
4139         if (ifmgd->associated && !sdata->local->wowlan) {
4140                 u8 bssid[ETH_ALEN];
4141                 struct cfg80211_deauth_request req = {
4142                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4143                         .bssid = bssid,
4144                 };
4145
4146                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4147                 ieee80211_mgd_deauth(sdata, &req);
4148         }
4149
4150         sdata_unlock(sdata);
4151 }
4152
4153 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4154 {
4155         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4156
4157         sdata_lock(sdata);
4158         if (!ifmgd->associated) {
4159                 sdata_unlock(sdata);
4160                 return;
4161         }
4162
4163         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4164                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4165                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4166                 ieee80211_sta_connection_lost(sdata,
4167                                               ifmgd->associated->bssid,
4168                                               WLAN_REASON_UNSPECIFIED,
4169                                               true);
4170                 sdata_unlock(sdata);
4171                 return;
4172         }
4173         sdata_unlock(sdata);
4174 }
4175 #endif
4176
4177 /* interface setup */
4178 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4179 {
4180         struct ieee80211_if_managed *ifmgd;
4181
4182         ifmgd = &sdata->u.mgd;
4183         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4184         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4185         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4186                   ieee80211_beacon_connection_loss_work);
4187         INIT_WORK(&ifmgd->csa_connection_drop_work,
4188                   ieee80211_csa_connection_drop_work);
4189         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4190         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4191                           ieee80211_tdls_peer_del_work);
4192         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4193                     (unsigned long) sdata);
4194         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4195                     (unsigned long) sdata);
4196         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4197                     (unsigned long) sdata);
4198         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4199                     (unsigned long) sdata);
4200         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4201                           ieee80211_sta_handle_tspec_ac_params_wk);
4202
4203         ifmgd->flags = 0;
4204         ifmgd->powersave = sdata->wdev.ps;
4205         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4206         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4207         ifmgd->p2p_noa_index = -1;
4208
4209         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4210                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4211         else
4212                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4213
4214         /* Setup TDLS data */
4215         spin_lock_init(&ifmgd->teardown_lock);
4216         ifmgd->teardown_skb = NULL;
4217         ifmgd->orig_teardown_skb = NULL;
4218 }
4219
4220 /* scan finished notification */
4221 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4222 {
4223         struct ieee80211_sub_if_data *sdata;
4224
4225         /* Restart STA timers */
4226         rcu_read_lock();
4227         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4228                 if (ieee80211_sdata_running(sdata))
4229                         ieee80211_restart_sta_timer(sdata);
4230         }
4231         rcu_read_unlock();
4232 }
4233
4234 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4235                                      struct cfg80211_bss *cbss)
4236 {
4237         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4238         const u8 *ht_cap_ie, *vht_cap_ie;
4239         const struct ieee80211_ht_cap *ht_cap;
4240         const struct ieee80211_vht_cap *vht_cap;
4241         u8 chains = 1;
4242
4243         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4244                 return chains;
4245
4246         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4247         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4248                 ht_cap = (void *)(ht_cap_ie + 2);
4249                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4250                 /*
4251                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4252                  *       "Tx Unequal Modulation Supported" fields.
4253                  */
4254         }
4255
4256         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4257                 return chains;
4258
4259         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4260         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4261                 u8 nss;
4262                 u16 tx_mcs_map;
4263
4264                 vht_cap = (void *)(vht_cap_ie + 2);
4265                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4266                 for (nss = 8; nss > 0; nss--) {
4267                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4268                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4269                                 break;
4270                 }
4271                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4272                 chains = max(chains, nss);
4273         }
4274
4275         return chains;
4276 }
4277
4278 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4279                                   struct cfg80211_bss *cbss)
4280 {
4281         struct ieee80211_local *local = sdata->local;
4282         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4283         const struct ieee80211_ht_cap *ht_cap = NULL;
4284         const struct ieee80211_ht_operation *ht_oper = NULL;
4285         const struct ieee80211_vht_operation *vht_oper = NULL;
4286         struct ieee80211_supported_band *sband;
4287         struct cfg80211_chan_def chandef;
4288         int ret;
4289         u32 i;
4290         bool have_80mhz;
4291
4292         sband = local->hw.wiphy->bands[cbss->channel->band];
4293
4294         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4295                           IEEE80211_STA_DISABLE_80P80MHZ |
4296                           IEEE80211_STA_DISABLE_160MHZ);
4297
4298         rcu_read_lock();
4299
4300         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4301             sband->ht_cap.ht_supported) {
4302                 const u8 *ht_oper_ie, *ht_cap_ie;
4303
4304                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4305                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4306                         ht_oper = (void *)(ht_oper_ie + 2);
4307
4308                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4309                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4310                         ht_cap = (void *)(ht_cap_ie + 2);
4311
4312                 if (!ht_cap) {
4313                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4314                         ht_oper = NULL;
4315                 }
4316         }
4317
4318         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4319             sband->vht_cap.vht_supported) {
4320                 const u8 *vht_oper_ie, *vht_cap;
4321
4322                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4323                                                    WLAN_EID_VHT_OPERATION);
4324                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4325                         vht_oper = (void *)(vht_oper_ie + 2);
4326                 if (vht_oper && !ht_oper) {
4327                         vht_oper = NULL;
4328                         sdata_info(sdata,
4329                                    "AP advertised VHT without HT, disabling both\n");
4330                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4331                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4332                 }
4333
4334                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4335                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4336                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4337                         vht_oper = NULL;
4338                 }
4339         }
4340
4341         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4342         have_80mhz = false;
4343         for (i = 0; i < sband->n_channels; i++) {
4344                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4345                                                 IEEE80211_CHAN_NO_80MHZ))
4346                         continue;
4347
4348                 have_80mhz = true;
4349                 break;
4350         }
4351
4352         if (!have_80mhz)
4353                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4354
4355         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4356                                                      cbss->channel,
4357                                                      ht_cap, ht_oper, vht_oper,
4358                                                      &chandef, false);
4359
4360         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4361                                       local->rx_chains);
4362
4363         rcu_read_unlock();
4364
4365         /* will change later if needed */
4366         sdata->smps_mode = IEEE80211_SMPS_OFF;
4367
4368         mutex_lock(&local->mtx);
4369         /*
4370          * If this fails (possibly due to channel context sharing
4371          * on incompatible channels, e.g. 80+80 and 160 sharing the
4372          * same control channel) try to use a smaller bandwidth.
4373          */
4374         ret = ieee80211_vif_use_channel(sdata, &chandef,
4375                                         IEEE80211_CHANCTX_SHARED);
4376
4377         /* don't downgrade for 5 and 10 MHz channels, though. */
4378         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4379             chandef.width == NL80211_CHAN_WIDTH_10)
4380                 goto out;
4381
4382         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4383                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4384                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4385                                                 IEEE80211_CHANCTX_SHARED);
4386         }
4387  out:
4388         mutex_unlock(&local->mtx);
4389         return ret;
4390 }
4391
4392 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4393                                      struct cfg80211_bss *cbss, bool assoc,
4394                                      bool override)
4395 {
4396         struct ieee80211_local *local = sdata->local;
4397         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4398         struct ieee80211_bss *bss = (void *)cbss->priv;
4399         struct sta_info *new_sta = NULL;
4400         struct ieee80211_supported_band *sband;
4401         bool have_sta = false;
4402         int err;
4403
4404         sband = local->hw.wiphy->bands[cbss->channel->band];
4405
4406         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4407                 return -EINVAL;
4408
4409         /* If a reconfig is happening, bail out */
4410         if (local->in_reconfig)
4411                 return -EBUSY;
4412
4413         if (assoc) {
4414                 rcu_read_lock();
4415                 have_sta = sta_info_get(sdata, cbss->bssid);
4416                 rcu_read_unlock();
4417         }
4418
4419         if (!have_sta) {
4420                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4421                 if (!new_sta)
4422                         return -ENOMEM;
4423         }
4424
4425         if (new_sta || override) {
4426                 err = ieee80211_prep_channel(sdata, cbss);
4427                 if (err) {
4428                         if (new_sta)
4429                                 sta_info_free(local, new_sta);
4430                         return -EINVAL;
4431                 }
4432         }
4433
4434         if (new_sta) {
4435                 u32 rates = 0, basic_rates = 0;
4436                 bool have_higher_than_11mbit;
4437                 int min_rate = INT_MAX, min_rate_index = -1;
4438                 struct ieee80211_chanctx_conf *chanctx_conf;
4439                 const struct cfg80211_bss_ies *ies;
4440                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4441                 u32 rate_flags;
4442
4443                 rcu_read_lock();
4444                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4445                 if (WARN_ON(!chanctx_conf)) {
4446                         rcu_read_unlock();
4447                         sta_info_free(local, new_sta);
4448                         return -EINVAL;
4449                 }
4450                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4451                 rcu_read_unlock();
4452
4453                 ieee80211_get_rates(sband, bss->supp_rates,
4454                                     bss->supp_rates_len,
4455                                     &rates, &basic_rates,
4456                                     &have_higher_than_11mbit,
4457                                     &min_rate, &min_rate_index,
4458                                     shift, rate_flags);
4459
4460                 /*
4461                  * This used to be a workaround for basic rates missing
4462                  * in the association response frame. Now that we no
4463                  * longer use the basic rates from there, it probably
4464                  * doesn't happen any more, but keep the workaround so
4465                  * in case some *other* APs are buggy in different ways
4466                  * we can connect -- with a warning.
4467                  */
4468                 if (!basic_rates && min_rate_index >= 0) {
4469                         sdata_info(sdata,
4470                                    "No basic rates, using min rate instead\n");
4471                         basic_rates = BIT(min_rate_index);
4472                 }
4473
4474                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4475                 sdata->vif.bss_conf.basic_rates = basic_rates;
4476
4477                 /* cf. IEEE 802.11 9.2.12 */
4478                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4479                     have_higher_than_11mbit)
4480                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4481                 else
4482                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4483
4484                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4485
4486                 /* set timing information */
4487                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4488                 rcu_read_lock();
4489                 ies = rcu_dereference(cbss->beacon_ies);
4490                 if (ies) {
4491                         const u8 *tim_ie;
4492
4493                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4494                         sdata->vif.bss_conf.sync_device_ts =
4495                                 bss->device_ts_beacon;
4496                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4497                                                   ies->data, ies->len);
4498                         if (tim_ie && tim_ie[1] >= 2)
4499                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4500                         else
4501                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4502                 } else if (!ieee80211_hw_check(&sdata->local->hw,
4503                                                TIMING_BEACON_ONLY)) {
4504                         ies = rcu_dereference(cbss->proberesp_ies);
4505                         /* must be non-NULL since beacon IEs were NULL */
4506                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4507                         sdata->vif.bss_conf.sync_device_ts =
4508                                 bss->device_ts_presp;
4509                         sdata->vif.bss_conf.sync_dtim_count = 0;
4510                 } else {
4511                         sdata->vif.bss_conf.sync_tsf = 0;
4512                         sdata->vif.bss_conf.sync_device_ts = 0;
4513                         sdata->vif.bss_conf.sync_dtim_count = 0;
4514                 }
4515                 rcu_read_unlock();
4516
4517                 /* tell driver about BSSID, basic rates and timing */
4518                 ieee80211_bss_info_change_notify(sdata,
4519                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4520                         BSS_CHANGED_BEACON_INT);
4521
4522                 if (assoc)
4523                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4524
4525                 err = sta_info_insert(new_sta);
4526                 new_sta = NULL;
4527                 if (err) {
4528                         sdata_info(sdata,
4529                                    "failed to insert STA entry for the AP (error %d)\n",
4530                                    err);
4531                         return err;
4532                 }
4533         } else
4534                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4535
4536         /* Cancel scan to ensure that nothing interferes with connection */
4537         if (local->scanning)
4538                 ieee80211_scan_cancel(local);
4539
4540         return 0;
4541 }
4542
4543 /* config hooks */
4544 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4545                        struct cfg80211_auth_request *req)
4546 {
4547         struct ieee80211_local *local = sdata->local;
4548         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4549         struct ieee80211_mgd_auth_data *auth_data;
4550         u16 auth_alg;
4551         int err;
4552
4553         /* prepare auth data structure */
4554
4555         switch (req->auth_type) {
4556         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4557                 auth_alg = WLAN_AUTH_OPEN;
4558                 break;
4559         case NL80211_AUTHTYPE_SHARED_KEY:
4560                 if (IS_ERR(local->wep_tx_tfm))
4561                         return -EOPNOTSUPP;
4562                 auth_alg = WLAN_AUTH_SHARED_KEY;
4563                 break;
4564         case NL80211_AUTHTYPE_FT:
4565                 auth_alg = WLAN_AUTH_FT;
4566                 break;
4567         case NL80211_AUTHTYPE_NETWORK_EAP:
4568                 auth_alg = WLAN_AUTH_LEAP;
4569                 break;
4570         case NL80211_AUTHTYPE_SAE:
4571                 auth_alg = WLAN_AUTH_SAE;
4572                 break;
4573         default:
4574                 return -EOPNOTSUPP;
4575         }
4576
4577         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4578                             req->ie_len, GFP_KERNEL);
4579         if (!auth_data)
4580                 return -ENOMEM;
4581
4582         auth_data->bss = req->bss;
4583
4584         if (req->sae_data_len >= 4) {
4585                 __le16 *pos = (__le16 *) req->sae_data;
4586                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4587                 auth_data->sae_status = le16_to_cpu(pos[1]);
4588                 memcpy(auth_data->data, req->sae_data + 4,
4589                        req->sae_data_len - 4);
4590                 auth_data->data_len += req->sae_data_len - 4;
4591         }
4592
4593         if (req->ie && req->ie_len) {
4594                 memcpy(&auth_data->data[auth_data->data_len],
4595                        req->ie, req->ie_len);
4596                 auth_data->data_len += req->ie_len;
4597         }
4598
4599         if (req->key && req->key_len) {
4600                 auth_data->key_len = req->key_len;
4601                 auth_data->key_idx = req->key_idx;
4602                 memcpy(auth_data->key, req->key, req->key_len);
4603         }
4604
4605         auth_data->algorithm = auth_alg;
4606
4607         /* try to authenticate/probe */
4608
4609         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4610             ifmgd->assoc_data) {
4611                 err = -EBUSY;
4612                 goto err_free;
4613         }
4614
4615         if (ifmgd->auth_data)
4616                 ieee80211_destroy_auth_data(sdata, false);
4617
4618         /* prep auth_data so we don't go into idle on disassoc */
4619         ifmgd->auth_data = auth_data;
4620
4621         if (ifmgd->associated) {
4622                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4623
4624                 sdata_info(sdata,
4625                            "disconnect from AP %pM for new auth to %pM\n",
4626                            ifmgd->associated->bssid, req->bss->bssid);
4627                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4628                                        WLAN_REASON_UNSPECIFIED,
4629                                        false, frame_buf);
4630
4631                 ieee80211_report_disconnect(sdata, frame_buf,
4632                                             sizeof(frame_buf), true,
4633                                             WLAN_REASON_UNSPECIFIED);
4634         }
4635
4636         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4637
4638         err = ieee80211_prep_connection(sdata, req->bss, false, false);
4639         if (err)
4640                 goto err_clear;
4641
4642         err = ieee80211_auth(sdata);
4643         if (err) {
4644                 sta_info_destroy_addr(sdata, req->bss->bssid);
4645                 goto err_clear;
4646         }
4647
4648         /* hold our own reference */
4649         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4650         return 0;
4651
4652  err_clear:
4653         eth_zero_addr(ifmgd->bssid);
4654         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4655         ifmgd->auth_data = NULL;
4656         mutex_lock(&sdata->local->mtx);
4657         ieee80211_vif_release_channel(sdata);
4658         mutex_unlock(&sdata->local->mtx);
4659  err_free:
4660         kfree(auth_data);
4661         return err;
4662 }
4663
4664 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4665                         struct cfg80211_assoc_request *req)
4666 {
4667         struct ieee80211_local *local = sdata->local;
4668         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4669         struct ieee80211_bss *bss = (void *)req->bss->priv;
4670         struct ieee80211_mgd_assoc_data *assoc_data;
4671         const struct cfg80211_bss_ies *beacon_ies;
4672         struct ieee80211_supported_band *sband;
4673         const u8 *ssidie, *ht_ie, *vht_ie;
4674         int i, err;
4675         bool override = false;
4676
4677         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4678         if (!assoc_data)
4679                 return -ENOMEM;
4680
4681         rcu_read_lock();
4682         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4683         if (!ssidie) {
4684                 rcu_read_unlock();
4685                 kfree(assoc_data);
4686                 return -EINVAL;
4687         }
4688         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4689         assoc_data->ssid_len = ssidie[1];
4690         rcu_read_unlock();
4691
4692         if (ifmgd->associated) {
4693                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4694
4695                 sdata_info(sdata,
4696                            "disconnect from AP %pM for new assoc to %pM\n",
4697                            ifmgd->associated->bssid, req->bss->bssid);
4698                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4699                                        WLAN_REASON_UNSPECIFIED,
4700                                        false, frame_buf);
4701
4702                 ieee80211_report_disconnect(sdata, frame_buf,
4703                                             sizeof(frame_buf), true,
4704                                             WLAN_REASON_UNSPECIFIED);
4705         }
4706
4707         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4708                 err = -EBUSY;
4709                 goto err_free;
4710         }
4711
4712         if (ifmgd->assoc_data) {
4713                 err = -EBUSY;
4714                 goto err_free;
4715         }
4716
4717         if (ifmgd->auth_data) {
4718                 bool match;
4719
4720                 /* keep sta info, bssid if matching */
4721                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4722                 ieee80211_destroy_auth_data(sdata, match);
4723         }
4724
4725         /* prepare assoc data */
4726
4727         ifmgd->beacon_crc_valid = false;
4728
4729         assoc_data->wmm = bss->wmm_used &&
4730                           (local->hw.queues >= IEEE80211_NUM_ACS);
4731
4732         /*
4733          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4734          * We still associate in non-HT mode (11a/b/g) if any one of these
4735          * ciphers is configured as pairwise.
4736          * We can set this to true for non-11n hardware, that'll be checked
4737          * separately along with the peer capabilities.
4738          */
4739         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4740                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4741                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4742                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4743                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4744                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4745                         netdev_info(sdata->dev,
4746                                     "disabling HT/VHT due to WEP/TKIP use\n");
4747                 }
4748         }
4749
4750         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4751         sband = local->hw.wiphy->bands[req->bss->channel->band];
4752         if (!sband->ht_cap.ht_supported ||
4753             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4754             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4755                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4756                 if (!bss->wmm_used &&
4757                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4758                         netdev_info(sdata->dev,
4759                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4760         }
4761
4762         /* disable VHT if we don't support it or the AP doesn't use WMM */
4763         if (!sband->vht_cap.vht_supported ||
4764             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4765             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4766                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4767                 if (!bss->wmm_used &&
4768                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4769                         netdev_info(sdata->dev,
4770                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4771         }
4772
4773         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4774         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4775                sizeof(ifmgd->ht_capa_mask));
4776
4777         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4778         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4779                sizeof(ifmgd->vht_capa_mask));
4780
4781         if (req->ie && req->ie_len) {
4782                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4783                 assoc_data->ie_len = req->ie_len;
4784         }
4785
4786         assoc_data->bss = req->bss;
4787
4788         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4789                 if (ifmgd->powersave)
4790                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4791                 else
4792                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4793         } else
4794                 sdata->smps_mode = ifmgd->req_smps;
4795
4796         assoc_data->capability = req->bss->capability;
4797         assoc_data->supp_rates = bss->supp_rates;
4798         assoc_data->supp_rates_len = bss->supp_rates_len;
4799
4800         rcu_read_lock();
4801         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4802         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4803                 assoc_data->ap_ht_param =
4804                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4805         else
4806                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4807         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4808         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4809                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4810                        sizeof(struct ieee80211_vht_cap));
4811         else
4812                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4813         rcu_read_unlock();
4814
4815         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4816                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4817              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4818                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4819
4820         if (bss->wmm_used && bss->uapsd_supported &&
4821             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4822                 assoc_data->uapsd = true;
4823                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4824         } else {
4825                 assoc_data->uapsd = false;
4826                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4827         }
4828
4829         if (req->prev_bssid)
4830                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4831
4832         if (req->use_mfp) {
4833                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4834                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4835         } else {
4836                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4837                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4838         }
4839
4840         if (req->flags & ASSOC_REQ_USE_RRM)
4841                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4842         else
4843                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4844
4845         if (req->crypto.control_port)
4846                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4847         else
4848                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4849
4850         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4851         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4852         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4853                                                         sdata->vif.type);
4854
4855         /* kick off associate process */
4856
4857         ifmgd->assoc_data = assoc_data;
4858         ifmgd->dtim_period = 0;
4859         ifmgd->have_beacon = false;
4860
4861         /* override HT/VHT configuration only if the AP and we support it */
4862         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4863                 struct ieee80211_sta_ht_cap sta_ht_cap;
4864
4865                 if (req->flags & ASSOC_REQ_DISABLE_HT)
4866                         override = true;
4867
4868                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4869                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4870
4871                 /* check for 40 MHz disable override */
4872                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4873                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4874                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4875                         override = true;
4876
4877                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4878                     req->flags & ASSOC_REQ_DISABLE_VHT)
4879                         override = true;
4880         }
4881
4882         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4883                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4884                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4885         }
4886
4887         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4888                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4889
4890         err = ieee80211_prep_connection(sdata, req->bss, true, override);
4891         if (err)
4892                 goto err_clear;
4893
4894         rcu_read_lock();
4895         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4896
4897         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4898             !beacon_ies) {
4899                 /*
4900                  * Wait up to one beacon interval ...
4901                  * should this be more if we miss one?
4902                  */
4903                 sdata_info(sdata, "waiting for beacon from %pM\n",
4904                            ifmgd->bssid);
4905                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4906                 assoc_data->timeout_started = true;
4907                 assoc_data->need_beacon = true;
4908         } else if (beacon_ies) {
4909                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4910                                                     beacon_ies->data,
4911                                                     beacon_ies->len);
4912                 u8 dtim_count = 0;
4913
4914                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4915                         const struct ieee80211_tim_ie *tim;
4916                         tim = (void *)(tim_ie + 2);
4917                         ifmgd->dtim_period = tim->dtim_period;
4918                         dtim_count = tim->dtim_count;
4919                 }
4920                 ifmgd->have_beacon = true;
4921                 assoc_data->timeout = jiffies;
4922                 assoc_data->timeout_started = true;
4923
4924                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4925                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4926                         sdata->vif.bss_conf.sync_device_ts =
4927                                 bss->device_ts_beacon;
4928                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4929                 }
4930         } else {
4931                 assoc_data->timeout = jiffies;
4932                 assoc_data->timeout_started = true;
4933         }
4934         rcu_read_unlock();
4935
4936         run_again(sdata, assoc_data->timeout);
4937
4938         if (bss->corrupt_data) {
4939                 char *corrupt_type = "data";
4940                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4941                         if (bss->corrupt_data &
4942                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4943                                 corrupt_type = "beacon and probe response";
4944                         else
4945                                 corrupt_type = "beacon";
4946                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4947                         corrupt_type = "probe response";
4948                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4949                            corrupt_type);
4950         }
4951
4952         return 0;
4953  err_clear:
4954         eth_zero_addr(ifmgd->bssid);
4955         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4956         ifmgd->assoc_data = NULL;
4957  err_free:
4958         kfree(assoc_data);
4959         return err;
4960 }
4961
4962 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4963                          struct cfg80211_deauth_request *req)
4964 {
4965         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4966         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4967         bool tx = !req->local_state_change;
4968
4969         if (ifmgd->auth_data &&
4970             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4971                 sdata_info(sdata,
4972                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4973                            req->bssid, req->reason_code,
4974                            ieee80211_get_reason_code_string(req->reason_code));
4975
4976                 drv_mgd_prepare_tx(sdata->local, sdata);
4977                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4978                                                IEEE80211_STYPE_DEAUTH,
4979                                                req->reason_code, tx,
4980                                                frame_buf);
4981                 ieee80211_destroy_auth_data(sdata, false);
4982                 ieee80211_report_disconnect(sdata, frame_buf,
4983                                             sizeof(frame_buf), true,
4984                                             req->reason_code);
4985
4986                 return 0;
4987         }
4988
4989         if (ifmgd->assoc_data &&
4990             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4991                 sdata_info(sdata,
4992                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
4993                            req->bssid, req->reason_code,
4994                            ieee80211_get_reason_code_string(req->reason_code));
4995
4996                 drv_mgd_prepare_tx(sdata->local, sdata);
4997                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4998                                                IEEE80211_STYPE_DEAUTH,
4999                                                req->reason_code, tx,
5000                                                frame_buf);
5001                 ieee80211_destroy_assoc_data(sdata, false, true);
5002                 ieee80211_report_disconnect(sdata, frame_buf,
5003                                             sizeof(frame_buf), true,
5004                                             req->reason_code);
5005                 return 0;
5006         }
5007
5008         if (ifmgd->associated &&
5009             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5010                 sdata_info(sdata,
5011                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5012                            req->bssid, req->reason_code,
5013                            ieee80211_get_reason_code_string(req->reason_code));
5014
5015                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5016                                        req->reason_code, tx, frame_buf);
5017                 ieee80211_report_disconnect(sdata, frame_buf,
5018                                             sizeof(frame_buf), true,
5019                                             req->reason_code);
5020                 return 0;
5021         }
5022
5023         return -ENOTCONN;
5024 }
5025
5026 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5027                            struct cfg80211_disassoc_request *req)
5028 {
5029         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5030         u8 bssid[ETH_ALEN];
5031         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5032
5033         /*
5034          * cfg80211 should catch this ... but it's racy since
5035          * we can receive a disassoc frame, process it, hand it
5036          * to cfg80211 while that's in a locked section already
5037          * trying to tell us that the user wants to disconnect.
5038          */
5039         if (ifmgd->associated != req->bss)
5040                 return -ENOLINK;
5041
5042         sdata_info(sdata,
5043                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5044                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5045
5046         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5047         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5048                                req->reason_code, !req->local_state_change,
5049                                frame_buf);
5050
5051         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5052                                     req->reason_code);
5053
5054         return 0;
5055 }
5056
5057 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5058 {
5059         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5060
5061         /*
5062          * Make sure some work items will not run after this,
5063          * they will not do anything but might not have been
5064          * cancelled when disconnecting.
5065          */
5066         cancel_work_sync(&ifmgd->monitor_work);
5067         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5068         cancel_work_sync(&ifmgd->request_smps_work);
5069         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5070         cancel_work_sync(&ifmgd->chswitch_work);
5071         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5072
5073         sdata_lock(sdata);
5074         if (ifmgd->assoc_data) {
5075                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5076                 ieee80211_destroy_assoc_data(sdata, false, false);
5077                 cfg80211_assoc_timeout(sdata->dev, bss);
5078         }
5079         if (ifmgd->auth_data)
5080                 ieee80211_destroy_auth_data(sdata, false);
5081         spin_lock_bh(&ifmgd->teardown_lock);
5082         if (ifmgd->teardown_skb) {
5083                 kfree_skb(ifmgd->teardown_skb);
5084                 ifmgd->teardown_skb = NULL;
5085                 ifmgd->orig_teardown_skb = NULL;
5086         }
5087         spin_unlock_bh(&ifmgd->teardown_lock);
5088         del_timer_sync(&ifmgd->timer);
5089         sdata_unlock(sdata);
5090 }
5091
5092 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5093                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5094                                gfp_t gfp)
5095 {
5096         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5097
5098         trace_api_cqm_rssi_notify(sdata, rssi_event);
5099
5100         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5101 }
5102 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5103
5104 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5105 {
5106         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5107
5108         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5109
5110         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5111 }
5112 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);