net/mac80211/mlme.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * BSS client mode implementation
   4  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   5  * Copyright 2004, Instant802 Networks, Inc.
   6  * Copyright 2005, Devicescape Software, Inc.
   7  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   8  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   9  * Copyright 2013-2014  Intel Mobile Communications GmbH
  10  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  11  * Copyright (C) 2018 - 2021 Intel Corporation
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/fips.h>
  16 #include <linux/if_ether.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/moduleparam.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32 #include "fils_aead.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_TIMEOUT_SAE      (HZ * 2)
  38 #define IEEE80211_AUTH_MAX_TRIES        3
  39 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  40 #define IEEE80211_AUTH_WAIT_SAE_RETRY   (HZ * 2)
  41 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  42 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  43 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  44 #define IEEE80211_ASSOC_MAX_TRIES       3
  45
  46 static int max_nullfunc_tries = 2;
  47 module_param(max_nullfunc_tries, int, 0644);
  48 MODULE_PARM_DESC(max_nullfunc_tries,
  49                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  50
  51 static int max_probe_tries = 5;
  52 module_param(max_probe_tries, int, 0644);
  53 MODULE_PARM_DESC(max_probe_tries,
  54                  "Maximum probe tries before disconnecting (reason 4).");
  55
  56 /*
  57  * Beacon loss timeout is calculated as N frames times the
  58  * advertised beacon interval.  This may need to be somewhat
  59  * higher than what hardware might detect to account for
  60  * delays in the host processing frames. But since we also
  61  * probe on beacon miss before declaring the connection lost
  62  * default to what we want.
  63  */
  64 static int beacon_loss_count = 7;
  65 module_param(beacon_loss_count, int, 0644);
  66 MODULE_PARM_DESC(beacon_loss_count,
  67                  "Number of beacon intervals before we decide beacon was lost.");
  68
  69 /*
  70  * Time the connection can be idle before we probe
  71  * it to see if we can still talk to the AP.
  72  */
  73 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  74 /*
  75  * Time we wait for a probe response after sending
  76  * a probe request because of beacon loss or for
  77  * checking the connection still works.
  78  */
  79 static int probe_wait_ms = 500;
  80 module_param(probe_wait_ms, int, 0644);
  81 MODULE_PARM_DESC(probe_wait_ms,
  82                  "Maximum time(ms) to wait for probe response"
  83                  " before disconnecting (reason 4).");
  84
  85 /*
  86  * How many Beacon frames need to have been used in average signal strength
  87  * before starting to indicate signal change events.
  88  */
  89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  90
  91 /*
  92  * We can have multiple work items (and connection probing)
  93  * scheduling this timer, but we need to take care to only
  94  * reschedule it when it should fire _earlier_ than it was
  95  * asked for before, or if it's not pending right now. This
  96  * function ensures that. Note that it then is required to
  97  * run this function for all timeouts after the first one
  98  * has happened -- the work that runs from this timer will
  99  * do that.
 100  */
 101 static void run_again(struct ieee80211_sub_if_data *sdata,
 102                       unsigned long timeout)
 103 {
 104         sdata_assert_lock(sdata);
 105
 106         if (!timer_pending(&sdata->u.mgd.timer) ||
 107             time_before(timeout, sdata->u.mgd.timer.expires))
 108                 mod_timer(&sdata->u.mgd.timer, timeout);
 109 }
 110
 111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 112 {
 113         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 114                 return;
 115
 116         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 117                 return;
 118
 119         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 120                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 121 }
 122
 123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 124 {
 125         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 126
 127         if (unlikely(!ifmgd->associated))
 128                 return;
 129
 130         if (ifmgd->probe_send_count)
 131                 ifmgd->probe_send_count = 0;
 132
 133         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 134                 return;
 135
 136         mod_timer(&ifmgd->conn_mon_timer,
 137                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 138 }
 139
 140 static int ecw2cw(int ecw)
 141 {
 142         return (1 << ecw) - 1;
 143 }
 144
 145 static u32
 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 147                              struct ieee80211_supported_band *sband,
 148                              struct ieee80211_channel *channel,
 149                              u32 vht_cap_info,
 150                              const struct ieee80211_ht_operation *ht_oper,
 151                              const struct ieee80211_vht_operation *vht_oper,
 152                              const struct ieee80211_he_operation *he_oper,
 153                              const struct ieee80211_eht_operation *eht_oper,
 154                              const struct ieee80211_s1g_oper_ie *s1g_oper,
 155                              struct cfg80211_chan_def *chandef, bool tracking)
 156 {
 157         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 158         struct cfg80211_chan_def vht_chandef;
 159         struct ieee80211_sta_ht_cap sta_ht_cap;
 160         u32 ht_cfreq, ret;
 161
 162         memset(chandef, 0, sizeof(struct cfg80211_chan_def));
 163         chandef->chan = channel;
 164         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 165         chandef->center_freq1 = channel->center_freq;
 166         chandef->freq1_offset = channel->freq_offset;
 167
 168         if (channel->band == NL80211_BAND_6GHZ) {
 169                 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
 170                                                     chandef)) {
 171                         mlme_dbg(sdata,
 172                                  "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
 173                         ret = IEEE80211_STA_DISABLE_HT |
 174                               IEEE80211_STA_DISABLE_VHT |
 175                               IEEE80211_STA_DISABLE_HE |
 176                               IEEE80211_STA_DISABLE_EHT;
 177                 } else {
 178                         ret = 0;
 179                 }
 180                 vht_chandef = *chandef;
 181                 goto out;
 182         } else if (sband->band == NL80211_BAND_S1GHZ) {
 183                 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
 184                         sdata_info(sdata,
 185                                    "Missing S1G Operation Element? Trying operating == primary\n");
 186                         chandef->width = ieee80211_s1g_channel_width(channel);
 187                 }
 188
 189                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ |
 190                       IEEE80211_STA_DISABLE_VHT |
 191                       IEEE80211_STA_DISABLE_80P80MHZ |
 192                       IEEE80211_STA_DISABLE_160MHZ;
 193                 goto out;
 194         }
 195
 196         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 197         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 198
 199         if (!ht_oper || !sta_ht_cap.ht_supported) {
 200                 mlme_dbg(sdata, "HT operation missing / HT not supported\n");
 201                 ret = IEEE80211_STA_DISABLE_HT |
 202                       IEEE80211_STA_DISABLE_VHT |
 203                       IEEE80211_STA_DISABLE_HE |
 204                       IEEE80211_STA_DISABLE_EHT;
 205                 goto out;
 206         }
 207
 208         chandef->width = NL80211_CHAN_WIDTH_20;
 209
 210         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 211                                                   channel->band);
 212         /* check that channel matches the right operating channel */
 213         if (!tracking && channel->center_freq != ht_cfreq) {
 214                 /*
 215                  * It's possible that some APs are confused here;
 216                  * Netgear WNDR3700 sometimes reports 4 higher than
 217                  * the actual channel in association responses, but
 218                  * since we look at probe response/beacon data here
 219                  * it should be OK.
 220                  */
 221                 sdata_info(sdata,
 222                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 223                            channel->center_freq, ht_cfreq,
 224                            ht_oper->primary_chan, channel->band);
 225                 ret = IEEE80211_STA_DISABLE_HT |
 226                       IEEE80211_STA_DISABLE_VHT |
 227                       IEEE80211_STA_DISABLE_HE |
 228                       IEEE80211_STA_DISABLE_EHT;
 229                 goto out;
 230         }
 231
 232         /* check 40 MHz support, if we have it */
 233         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 234                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 235         } else {
 236                 mlme_dbg(sdata, "40 MHz not supported\n");
 237                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 238                 ret = IEEE80211_STA_DISABLE_VHT;
 239                 /* also mark 40 MHz disabled */
 240                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 241                 goto out;
 242         }
 243
 244         if (!vht_oper || !sband->vht_cap.vht_supported) {
 245                 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n");
 246                 ret = IEEE80211_STA_DISABLE_VHT;
 247                 goto out;
 248         }
 249
 250         vht_chandef = *chandef;
 251         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
 252             (le32_to_cpu(he_oper->he_oper_params) &
 253              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
 254                 struct ieee80211_vht_operation he_oper_vht_cap;
 255
 256                 /*
 257                  * Set only first 3 bytes (other 2 aren't used in
 258                  * ieee80211_chandef_vht_oper() anyway)
 259                  */
 260                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
 261                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
 262
 263                 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
 264                                                 &he_oper_vht_cap, ht_oper,
 265                                                 &vht_chandef)) {
 266                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 267                                 sdata_info(sdata,
 268                                            "HE AP VHT information is invalid, disabling HE\n");
 269                         ret = IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT;
 270                         goto out;
 271                 }
 272         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
 273                                                vht_cap_info,
 274                                                vht_oper, ht_oper,
 275                                                &vht_chandef)) {
 276                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 277                         sdata_info(sdata,
 278                                    "AP VHT information is invalid, disabling VHT\n");
 279                 ret = IEEE80211_STA_DISABLE_VHT;
 280                 goto out;
 281         }
 282
 283         if (!cfg80211_chandef_valid(&vht_chandef)) {
 284                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 285                         sdata_info(sdata,
 286                                    "AP VHT information is invalid, disabling VHT\n");
 287                 ret = IEEE80211_STA_DISABLE_VHT;
 288                 goto out;
 289         }
 290
 291         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 292                 ret = 0;
 293                 goto out;
 294         }
 295
 296         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 297                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 298                         sdata_info(sdata,
 299                                    "AP VHT information doesn't match HT, disabling VHT\n");
 300                 ret = IEEE80211_STA_DISABLE_VHT;
 301                 goto out;
 302         }
 303
 304         *chandef = vht_chandef;
 305
 306         ret = 0;
 307
 308 out:
 309         /*
 310          * When tracking the current AP, don't do any further checks if the
 311          * new chandef is identical to the one we're currently using for the
 312          * connection. This keeps us from playing ping-pong with regulatory,
 313          * without it the following can happen (for example):
 314          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 315          *  - AP advertises regdom US
 316          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 317          *  - the code below detects an unsupported channel, downgrades, and
 318          *    we disconnect from the AP in the caller
 319          *  - disconnect causes CRDA to reload world regdomain and the game
 320          *    starts anew.
 321          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 322          *
 323          * It seems possible that there are still scenarios with CSA or real
 324          * bandwidth changes where a this could happen, but those cases are
 325          * less common and wouldn't completely prevent using the AP.
 326          */
 327         if (tracking &&
 328             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 329                 return ret;
 330
 331         /* don't print the message below for VHT mismatch if VHT is disabled */
 332         if (ret & IEEE80211_STA_DISABLE_VHT)
 333                 vht_chandef = *chandef;
 334
 335         /*
 336          * Ignore the DISABLED flag when we're already connected and only
 337          * tracking the APs beacon for bandwidth changes - otherwise we
 338          * might get disconnected here if we connect to an AP, update our
 339          * regulatory information based on the AP's country IE and the
 340          * information we have is wrong/outdated and disables the channel
 341          * that we're actually using for the connection to the AP.
 342          */
 343         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 344                                         tracking ? 0 :
 345                                                    IEEE80211_CHAN_DISABLED)) {
 346                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 347                         ret = IEEE80211_STA_DISABLE_HT |
 348                               IEEE80211_STA_DISABLE_VHT |
 349                               IEEE80211_STA_DISABLE_HE |
 350                               IEEE80211_STA_DISABLE_EHT;
 351                         break;
 352                 }
 353
 354                 ret |= ieee80211_chandef_downgrade(chandef);
 355         }
 356
 357         if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
 358                                                  IEEE80211_CHAN_NO_HE))
 359                 ret |= IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT;
 360
 361         if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
 362                                                   IEEE80211_CHAN_NO_EHT))
 363                 ret |= IEEE80211_STA_DISABLE_EHT;
 364
 365         if (chandef->width != vht_chandef.width && !tracking)
 366                 sdata_info(sdata,
 367                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 368
 369         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 370         return ret;
 371 }
 372
 373 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 374                                struct sta_info *sta,
 375                                const struct ieee80211_ht_cap *ht_cap,
 376                                const struct ieee80211_vht_cap *vht_cap,
 377                                const struct ieee80211_ht_operation *ht_oper,
 378                                const struct ieee80211_vht_operation *vht_oper,
 379                                const struct ieee80211_he_operation *he_oper,
 380                                const struct ieee80211_eht_operation *eht_oper,
 381                                const struct ieee80211_s1g_oper_ie *s1g_oper,
 382                                const u8 *bssid, u32 *changed)
 383 {
 384         struct ieee80211_local *local = sdata->local;
 385         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 386         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
 387         struct ieee80211_supported_band *sband =
 388                 local->hw.wiphy->bands[chan->band];
 389         struct cfg80211_chan_def chandef;
 390         u16 ht_opmode;
 391         u32 flags;
 392         u32 vht_cap_info = 0;
 393         int ret;
 394
 395         /* if HT was/is disabled, don't track any bandwidth changes */
 396         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 397                 return 0;
 398
 399         /* don't check VHT if we associated as non-VHT station */
 400         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 401                 vht_oper = NULL;
 402
 403         /* don't check HE if we associated as non-HE station */
 404         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
 405             !ieee80211_get_he_iftype_cap(sband,
 406                                          ieee80211_vif_type_p2p(&sdata->vif))) {
 407                 he_oper = NULL;
 408                 eht_oper = NULL;
 409         }
 410
 411         /* don't check EHT if we associated as non-EHT station */
 412         if (ifmgd->flags & IEEE80211_STA_DISABLE_EHT ||
 413             !ieee80211_get_eht_iftype_cap(sband,
 414                                          ieee80211_vif_type_p2p(&sdata->vif)))
 415                 eht_oper = NULL;
 416
 417         if (WARN_ON_ONCE(!sta))
 418                 return -EINVAL;
 419
 420         /*
 421          * if bss configuration changed store the new one -
 422          * this may be applicable even if channel is identical
 423          */
 424         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 425         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 426                 *changed |= BSS_CHANGED_HT;
 427                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 428         }
 429
 430         if (vht_cap)
 431                 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
 432
 433         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
 434         flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info,
 435                                              ht_oper, vht_oper,
 436                                              he_oper, eht_oper,
 437                                              s1g_oper, &chandef, true);
 438
 439         /*
 440          * Downgrade the new channel if we associated with restricted
 441          * capabilities. For example, if we associated as a 20 MHz STA
 442          * to a 40 MHz AP (due to regulatory, capabilities or config
 443          * reasons) then switching to a 40 MHz channel now won't do us
 444          * any good -- we couldn't use it with the AP.
 445          */
 446         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 447             chandef.width == NL80211_CHAN_WIDTH_80P80)
 448                 flags |= ieee80211_chandef_downgrade(&chandef);
 449         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 450             chandef.width == NL80211_CHAN_WIDTH_160)
 451                 flags |= ieee80211_chandef_downgrade(&chandef);
 452         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 453             chandef.width > NL80211_CHAN_WIDTH_20)
 454                 flags |= ieee80211_chandef_downgrade(&chandef);
 455
 456         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 457                 return 0;
 458
 459         sdata_info(sdata,
 460                    "AP %pM changed bandwidth, new config is %d.%03d MHz, "
 461                    "width %d (%d.%03d/%d MHz)\n",
 462                    ifmgd->bssid, chandef.chan->center_freq,
 463                    chandef.chan->freq_offset, chandef.width,
 464                    chandef.center_freq1, chandef.freq1_offset,
 465                    chandef.center_freq2);
 466
 467         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 468                                       IEEE80211_STA_DISABLE_VHT |
 469                                       IEEE80211_STA_DISABLE_HE |
 470                                       IEEE80211_STA_DISABLE_EHT |
 471                                       IEEE80211_STA_DISABLE_40MHZ |
 472                                       IEEE80211_STA_DISABLE_80P80MHZ |
 473                                       IEEE80211_STA_DISABLE_160MHZ |
 474                                       IEEE80211_STA_DISABLE_320MHZ)) ||
 475             !cfg80211_chandef_valid(&chandef)) {
 476                 sdata_info(sdata,
 477                            "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
 478                            ifmgd->bssid, flags, ifmgd->flags);
 479                 return -EINVAL;
 480         }
 481
 482         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 483
 484         if (ret) {
 485                 sdata_info(sdata,
 486                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 487                            ifmgd->bssid);
 488                 return ret;
 489         }
 490
 491         return 0;
 492 }
 493
 494 /* frame sending functions */
 495
 496 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 497                                 struct sk_buff *skb, u8 ap_ht_param,
 498                                 struct ieee80211_supported_band *sband,
 499                                 struct ieee80211_channel *channel,
 500                                 enum ieee80211_smps_mode smps)
 501 {
 502         u8 *pos;
 503         u32 flags = channel->flags;
 504         u16 cap;
 505         struct ieee80211_sta_ht_cap ht_cap;
 506
 507         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 508
 509         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 510         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 511
 512         /* determine capability flags */
 513         cap = ht_cap.cap;
 514
 515         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 516         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 517                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 518                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 519                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 520                 }
 521                 break;
 522         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 523                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 524                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 525                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 526                 }
 527                 break;
 528         }
 529
 530         /*
 531          * If 40 MHz was disabled associate as though we weren't
 532          * capable of 40 MHz -- some broken APs will never fall
 533          * back to trying to transmit in 20 MHz.
 534          */
 535         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 536                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 537                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 538         }
 539
 540         /* set SM PS mode properly */
 541         cap &= ~IEEE80211_HT_CAP_SM_PS;
 542         switch (smps) {
 543         case IEEE80211_SMPS_AUTOMATIC:
 544         case IEEE80211_SMPS_NUM_MODES:
 545                 WARN_ON(1);
 546                 fallthrough;
 547         case IEEE80211_SMPS_OFF:
 548                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 549                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 550                 break;
 551         case IEEE80211_SMPS_STATIC:
 552                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 553                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 554                 break;
 555         case IEEE80211_SMPS_DYNAMIC:
 556                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 557                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 558                 break;
 559         }
 560
 561         /* reserve and fill IE */
 562         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 563         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 564 }
 565
 566 /* This function determines vht capability flags for the association
 567  * and builds the IE.
 568  * Note - the function may set the owner of the MU-MIMO capability
 569  */
 570 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 571                                  struct sk_buff *skb,
 572                                  struct ieee80211_supported_band *sband,
 573                                  struct ieee80211_vht_cap *ap_vht_cap)
 574 {
 575         struct ieee80211_local *local = sdata->local;
 576         u8 *pos;
 577         u32 cap;
 578         struct ieee80211_sta_vht_cap vht_cap;
 579         u32 mask, ap_bf_sts, our_bf_sts;
 580
 581         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 582
 583         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 584         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 585
 586         /* determine capability flags */
 587         cap = vht_cap.cap;
 588
 589         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 590                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 591
 592                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 593                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 594                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 595                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 596         }
 597
 598         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 599                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 600                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 601         }
 602
 603         /*
 604          * Some APs apparently get confused if our capabilities are better
 605          * than theirs, so restrict what we advertise in the assoc request.
 606          */
 607         if (!(ap_vht_cap->vht_cap_info &
 608                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 609                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 610                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 611         else if (!(ap_vht_cap->vht_cap_info &
 612                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 613                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 614
 615         /*
 616          * If some other vif is using the MU-MIMO capability we cannot associate
 617          * using MU-MIMO - this will lead to contradictions in the group-id
 618          * mechanism.
 619          * Ownership is defined since association request, in order to avoid
 620          * simultaneous associations with MU-MIMO.
 621          */
 622         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 623                 bool disable_mu_mimo = false;
 624                 struct ieee80211_sub_if_data *other;
 625
 626                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 627                         if (other->vif.mu_mimo_owner) {
 628                                 disable_mu_mimo = true;
 629                                 break;
 630                         }
 631                 }
 632                 if (disable_mu_mimo)
 633                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 634                 else
 635                         sdata->vif.mu_mimo_owner = true;
 636         }
 637
 638         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 639
 640         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 641         our_bf_sts = cap & mask;
 642
 643         if (ap_bf_sts < our_bf_sts) {
 644                 cap &= ~mask;
 645                 cap |= ap_bf_sts;
 646         }
 647
 648         /* reserve and fill IE */
 649         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 650         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 651 }
 652
 653 /* This function determines HE capability flags for the association
 654  * and builds the IE.
 655  */
 656 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 657                                 struct sk_buff *skb,
 658                                 struct ieee80211_supported_band *sband)
 659 {
 660         u8 *pos, *pre_he_pos;
 661         const struct ieee80211_sta_he_cap *he_cap = NULL;
 662         struct ieee80211_chanctx_conf *chanctx_conf;
 663         u8 he_cap_size;
 664         bool reg_cap = false;
 665
 666         rcu_read_lock();
 667         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 668         if (!WARN_ON_ONCE(!chanctx_conf))
 669                 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
 670                                                   &chanctx_conf->def,
 671                                                   IEEE80211_CHAN_NO_HE);
 672
 673         rcu_read_unlock();
 674
 675         he_cap = ieee80211_get_he_iftype_cap(sband,
 676                                              ieee80211_vif_type_p2p(&sdata->vif));
 677         if (!he_cap || !chanctx_conf || !reg_cap)
 678                 return;
 679
 680         /* get a max size estimate */
 681         he_cap_size =
 682                 2 + 1 + sizeof(he_cap->he_cap_elem) +
 683                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 684                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 685                                       he_cap->he_cap_elem.phy_cap_info);
 686         pos = skb_put(skb, he_cap_size);
 687         pre_he_pos = pos;
 688         pos = ieee80211_ie_build_he_cap(sdata->u.mgd.flags,
 689                                         pos, he_cap, pos + he_cap_size);
 690         /* trim excess if any */
 691         skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
 692
 693         ieee80211_ie_build_he_6ghz_cap(sdata, skb);
 694 }
 695
 696 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
 697                                  struct sk_buff *skb,
 698                                  struct ieee80211_supported_band *sband)
 699 {
 700         u8 *pos;
 701         const struct ieee80211_sta_he_cap *he_cap;
 702         const struct ieee80211_sta_eht_cap *eht_cap;
 703         struct ieee80211_chanctx_conf *chanctx_conf;
 704         u8 eht_cap_size;
 705         bool reg_cap = false;
 706
 707         rcu_read_lock();
 708         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 709         if (!WARN_ON_ONCE(!chanctx_conf))
 710                 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
 711                                                   &chanctx_conf->def,
 712                                                   IEEE80211_CHAN_NO_HE |
 713                                                   IEEE80211_CHAN_NO_EHT);
 714         rcu_read_unlock();
 715
 716         he_cap = ieee80211_get_he_iftype_cap(sband,
 717                                              ieee80211_vif_type_p2p(&sdata->vif));
 718         eht_cap = ieee80211_get_eht_iftype_cap(sband,
 719                                                ieee80211_vif_type_p2p(&sdata->vif));
 720
 721         /*
 722          * EHT capabilities element is only added if the HE capabilities element
 723          * was added so assume that 'he_cap' is valid and don't check it.
 724          */
 725         if (WARN_ON(!he_cap || !eht_cap || !reg_cap))
 726                 return;
 727
 728         eht_cap_size =
 729                 2 + 1 + sizeof(eht_cap->eht_cap_elem) +
 730                 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
 731                                            &eht_cap->eht_cap_elem) +
 732                 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
 733                                        eht_cap->eht_cap_elem.phy_cap_info);
 734         pos = skb_put(skb, eht_cap_size);
 735         ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size);
 736 }
 737
 738 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 739 {
 740         struct ieee80211_local *local = sdata->local;
 741         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 742         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 743         struct sk_buff *skb;
 744         struct ieee80211_mgmt *mgmt;
 745         u8 *pos, qos_info, *ie_start;
 746         size_t offset = 0, noffset;
 747         int i, count, rates_len, supp_rates_len, shift;
 748         u16 capab;
 749         struct ieee80211_supported_band *sband;
 750         struct ieee80211_chanctx_conf *chanctx_conf;
 751         struct ieee80211_channel *chan;
 752         u32 rates = 0;
 753         __le16 listen_int;
 754         struct element *ext_capa = NULL;
 755         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
 756         const struct ieee80211_sband_iftype_data *iftd;
 757         struct ieee80211_prep_tx_info info = {};
 758         int ret;
 759
 760         /* we know it's writable, cast away the const */
 761         if (assoc_data->ie_len)
 762                 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
 763                                                       assoc_data->ie,
 764                                                       assoc_data->ie_len);
 765
 766         sdata_assert_lock(sdata);
 767
 768         rcu_read_lock();
 769         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 770         if (WARN_ON(!chanctx_conf)) {
 771                 rcu_read_unlock();
 772                 return -EINVAL;
 773         }
 774         chan = chanctx_conf->def.chan;
 775         rcu_read_unlock();
 776         sband = local->hw.wiphy->bands[chan->band];
 777         shift = ieee80211_vif_get_shift(&sdata->vif);
 778
 779         if (assoc_data->supp_rates_len) {
 780                 /*
 781                  * Get all rates supported by the device and the AP as
 782                  * some APs don't like getting a superset of their rates
 783                  * in the association request (e.g. D-Link DAP 1353 in
 784                  * b-only mode)...
 785                  */
 786                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 787                                                      assoc_data->supp_rates,
 788                                                      assoc_data->supp_rates_len,
 789                                                      &rates);
 790         } else {
 791                 /*
 792                  * In case AP not provide any supported rates information
 793                  * before association, we send information element(s) with
 794                  * all rates that we support.
 795                  */
 796                 rates_len = 0;
 797                 for (i = 0; i < sband->n_bitrates; i++) {
 798                         rates |= BIT(i);
 799                         rates_len++;
 800                 }
 801         }
 802
 803         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
 804
 805         skb = alloc_skb(local->hw.extra_tx_headroom +
 806                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 807                         2 + assoc_data->ssid_len + /* SSID */
 808                         4 + rates_len + /* (extended) rates */
 809                         4 + /* power capability */
 810                         2 + 2 * sband->n_channels + /* supported channels */
 811                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 812                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 813                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
 814                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
 815                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
 816                         2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
 817                         assoc_data->ie_len + /* extra IEs */
 818                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
 819                         9 + /* WMM */
 820                         (iftd ? iftd->vendor_elems.len : 0),
 821                         GFP_KERNEL);
 822         if (!skb)
 823                 return -ENOMEM;
 824
 825         skb_reserve(skb, local->hw.extra_tx_headroom);
 826
 827         capab = WLAN_CAPABILITY_ESS;
 828
 829         if (sband->band == NL80211_BAND_2GHZ) {
 830                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 831                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 832         }
 833
 834         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 835                 capab |= WLAN_CAPABILITY_PRIVACY;
 836
 837         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 838             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
 839                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 840
 841         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
 842                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
 843
 844         mgmt = skb_put_zero(skb, 24);
 845         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 846         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 847         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 848
 849         listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ?
 850                         ieee80211_encode_usf(local->hw.conf.listen_interval) :
 851                         local->hw.conf.listen_interval);
 852         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 853                 skb_put(skb, 10);
 854                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 855                                                   IEEE80211_STYPE_REASSOC_REQ);
 856                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 857                 mgmt->u.reassoc_req.listen_interval = listen_int;
 858                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 859                        ETH_ALEN);
 860                 info.subtype = IEEE80211_STYPE_REASSOC_REQ;
 861         } else {
 862                 skb_put(skb, 4);
 863                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 864                                                   IEEE80211_STYPE_ASSOC_REQ);
 865                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 866                 mgmt->u.assoc_req.listen_interval = listen_int;
 867                 info.subtype = IEEE80211_STYPE_ASSOC_REQ;
 868         }
 869
 870         /* SSID */
 871         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 872         ie_start = pos;
 873         *pos++ = WLAN_EID_SSID;
 874         *pos++ = assoc_data->ssid_len;
 875         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 876
 877         if (sband->band == NL80211_BAND_S1GHZ)
 878                 goto skip_rates;
 879
 880         /* add all rates which were marked to be used above */
 881         supp_rates_len = rates_len;
 882         if (supp_rates_len > 8)
 883                 supp_rates_len = 8;
 884
 885         pos = skb_put(skb, supp_rates_len + 2);
 886         *pos++ = WLAN_EID_SUPP_RATES;
 887         *pos++ = supp_rates_len;
 888
 889         count = 0;
 890         for (i = 0; i < sband->n_bitrates; i++) {
 891                 if (BIT(i) & rates) {
 892                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 893                                                 5 * (1 << shift));
 894                         *pos++ = (u8) rate;
 895                         if (++count == 8)
 896                                 break;
 897                 }
 898         }
 899
 900         if (rates_len > count) {
 901                 pos = skb_put(skb, rates_len - count + 2);
 902                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 903                 *pos++ = rates_len - count;
 904
 905                 for (i++; i < sband->n_bitrates; i++) {
 906                         if (BIT(i) & rates) {
 907                                 int rate;
 908                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 909                                                     5 * (1 << shift));
 910                                 *pos++ = (u8) rate;
 911                         }
 912                 }
 913         }
 914
 915 skip_rates:
 916         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
 917             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
 918                 pos = skb_put(skb, 4);
 919                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 920                 *pos++ = 2;
 921                 *pos++ = 0; /* min tx power */
 922                  /* max tx power */
 923                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 924         }
 925
 926         /*
 927          * Per spec, we shouldn't include the list of channels if we advertise
 928          * support for extended channel switching, but we've always done that;
 929          * (for now?) apply this restriction only on the (new) 6 GHz band.
 930          */
 931         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
 932             (sband->band != NL80211_BAND_6GHZ ||
 933              !ext_capa || ext_capa->datalen < 1 ||
 934              !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
 935                 /* TODO: get this in reg domain format */
 936                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 937                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 938                 *pos++ = 2 * sband->n_channels;
 939                 for (i = 0; i < sband->n_channels; i++) {
 940                         *pos++ = ieee80211_frequency_to_channel(
 941                                         sband->channels[i].center_freq);
 942                         *pos++ = 1; /* one channel in the subband*/
 943                 }
 944         }
 945
 946         /* Set MBSSID support for HE AP if needed */
 947         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
 948             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
 949             ext_capa && ext_capa->datalen >= 3)
 950                 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
 951
 952         /* if present, add any custom IEs that go before HT */
 953         if (assoc_data->ie_len) {
 954                 static const u8 before_ht[] = {
 955                         WLAN_EID_SSID,
 956                         WLAN_EID_SUPP_RATES,
 957                         WLAN_EID_EXT_SUPP_RATES,
 958                         WLAN_EID_PWR_CAPABILITY,
 959                         WLAN_EID_SUPPORTED_CHANNELS,
 960                         WLAN_EID_RSN,
 961                         WLAN_EID_QOS_CAPA,
 962                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 963                         WLAN_EID_MOBILITY_DOMAIN,
 964                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 965                         WLAN_EID_RIC_DATA,              /* reassoc only */
 966                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 967                 };
 968                 static const u8 after_ric[] = {
 969                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 970                         WLAN_EID_HT_CAPABILITY,
 971                         WLAN_EID_BSS_COEX_2040,
 972                         /* luckily this is almost always there */
 973                         WLAN_EID_EXT_CAPABILITY,
 974                         WLAN_EID_QOS_TRAFFIC_CAPA,
 975                         WLAN_EID_TIM_BCAST_REQ,
 976                         WLAN_EID_INTERWORKING,
 977                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 978                         WLAN_EID_VHT_CAPABILITY,
 979                         WLAN_EID_OPMODE_NOTIF,
 980                 };
 981
 982                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
 983                                                  assoc_data->ie_len,
 984                                                  before_ht,
 985                                                  ARRAY_SIZE(before_ht),
 986                                                  after_ric,
 987                                                  ARRAY_SIZE(after_ric),
 988                                                  offset);
 989                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
 990                 offset = noffset;
 991         }
 992
 993         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 994                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 995                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 996
 997         if (sband->band != NL80211_BAND_6GHZ &&
 998             !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 999                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
1000                                     sband, chan, sdata->smps_mode);
1001
1002         /* if present, add any custom IEs that go before VHT */
1003         if (assoc_data->ie_len) {
1004                 static const u8 before_vht[] = {
1005                         /*
1006                          * no need to list the ones split off before HT
1007                          * or generated here
1008                          */
1009                         WLAN_EID_BSS_COEX_2040,
1010                         WLAN_EID_EXT_CAPABILITY,
1011                         WLAN_EID_QOS_TRAFFIC_CAPA,
1012                         WLAN_EID_TIM_BCAST_REQ,
1013                         WLAN_EID_INTERWORKING,
1014                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1015                 };
1016
1017                 /* RIC already taken above, so no need to handle here anymore */
1018                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
1019                                              before_vht, ARRAY_SIZE(before_vht),
1020                                              offset);
1021                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1022                 offset = noffset;
1023         }
1024
1025         /* if present, add any custom IEs that go before HE */
1026         if (assoc_data->ie_len) {
1027                 static const u8 before_he[] = {
1028                         /*
1029                          * no need to list the ones split off before VHT
1030                          * or generated here
1031                          */
1032                         WLAN_EID_OPMODE_NOTIF,
1033                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
1034                         /* 11ai elements */
1035                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
1036                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
1037                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
1038                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
1039                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
1040                         /* TODO: add 11ah/11aj/11ak elements */
1041                 };
1042
1043                 /* RIC already taken above, so no need to handle here anymore */
1044                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
1045                                              before_he, ARRAY_SIZE(before_he),
1046                                              offset);
1047                 pos = skb_put(skb, noffset - offset);
1048                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
1049                 offset = noffset;
1050         }
1051
1052         if (sband->band != NL80211_BAND_6GHZ &&
1053             !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
1054                 ieee80211_add_vht_ie(sdata, skb, sband,
1055                                      &assoc_data->ap_vht_cap);
1056
1057         /*
1058          * If AP doesn't support HT, mark HE and EHT as disabled.
1059          * If on the 5GHz band, make sure it supports VHT.
1060          */
1061         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
1062             (sband->band == NL80211_BAND_5GHZ &&
1063              ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
1064                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE |
1065                                 IEEE80211_STA_DISABLE_EHT;
1066
1067         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
1068                 ieee80211_add_he_ie(sdata, skb, sband);
1069
1070                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_EHT))
1071                         ieee80211_add_eht_ie(sdata, skb, sband);
1072         }
1073
1074         /* if present, add any custom non-vendor IEs that go after HE */
1075         if (assoc_data->ie_len) {
1076                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1077                                                     assoc_data->ie_len,
1078                                                     offset);
1079                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1080                 offset = noffset;
1081         }
1082
1083         if (assoc_data->wmm) {
1084                 if (assoc_data->uapsd) {
1085                         qos_info = ifmgd->uapsd_queues;
1086                         qos_info |= (ifmgd->uapsd_max_sp_len <<
1087                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1088                 } else {
1089                         qos_info = 0;
1090                 }
1091
1092                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1093         }
1094
1095         if (sband->band == NL80211_BAND_S1GHZ) {
1096                 ieee80211_add_aid_request_ie(sdata, skb);
1097                 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1098         }
1099
1100         if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1101                 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
1102
1103         /* add any remaining custom (i.e. vendor specific here) IEs */
1104         if (assoc_data->ie_len) {
1105                 noffset = assoc_data->ie_len;
1106                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1107         }
1108
1109         if (assoc_data->fils_kek_len) {
1110                 ret = fils_encrypt_assoc_req(skb, assoc_data);
1111                 if (ret < 0) {
1112                         dev_kfree_skb(skb);
1113                         return ret;
1114                 }
1115         }
1116
1117         pos = skb_tail_pointer(skb);
1118         kfree(ifmgd->assoc_req_ies);
1119         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1120         if (!ifmgd->assoc_req_ies) {
1121                 dev_kfree_skb(skb);
1122                 return -ENOMEM;
1123         }
1124
1125         ifmgd->assoc_req_ies_len = pos - ie_start;
1126
1127         drv_mgd_prepare_tx(local, sdata, &info);
1128
1129         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1130         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1131                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1132                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
1133         ieee80211_tx_skb(sdata, skb);
1134
1135         return 0;
1136 }
1137
1138 void ieee80211_send_pspoll(struct ieee80211_local *local,
1139                            struct ieee80211_sub_if_data *sdata)
1140 {
1141         struct ieee80211_pspoll *pspoll;
1142         struct sk_buff *skb;
1143
1144         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1145         if (!skb)
1146                 return;
1147
1148         pspoll = (struct ieee80211_pspoll *) skb->data;
1149         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1150
1151         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1152         ieee80211_tx_skb(sdata, skb);
1153 }
1154
1155 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1156                              struct ieee80211_sub_if_data *sdata,
1157                              bool powersave)
1158 {
1159         struct sk_buff *skb;
1160         struct ieee80211_hdr_3addr *nullfunc;
1161         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1162
1163         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1164                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1165         if (!skb)
1166                 return;
1167
1168         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1169         if (powersave)
1170                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1171
1172         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1173                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1174
1175         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1176                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1177
1178         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1179                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1180
1181         ieee80211_tx_skb(sdata, skb);
1182 }
1183
1184 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1185                                    struct ieee80211_sub_if_data *sdata)
1186 {
1187         struct sk_buff *skb;
1188         struct ieee80211_hdr *nullfunc;
1189         __le16 fc;
1190
1191         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1192                 return;
1193
1194         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1195         if (!skb)
1196                 return;
1197
1198         skb_reserve(skb, local->hw.extra_tx_headroom);
1199
1200         nullfunc = skb_put_zero(skb, 30);
1201         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1202                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1203         nullfunc->frame_control = fc;
1204         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1205         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1206         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1207         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1208
1209         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1210         ieee80211_tx_skb(sdata, skb);
1211 }
1212
1213 /* spectrum management related things */
1214 static void ieee80211_chswitch_work(struct work_struct *work)
1215 {
1216         struct ieee80211_sub_if_data *sdata =
1217                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1218         struct ieee80211_local *local = sdata->local;
1219         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1220         int ret;
1221
1222         if (!ieee80211_sdata_running(sdata))
1223                 return;
1224
1225         sdata_lock(sdata);
1226         mutex_lock(&local->mtx);
1227         mutex_lock(&local->chanctx_mtx);
1228
1229         if (!ifmgd->associated)
1230                 goto out;
1231
1232         if (!sdata->vif.csa_active)
1233                 goto out;
1234
1235         /*
1236          * using reservation isn't immediate as it may be deferred until later
1237          * with multi-vif. once reservation is complete it will re-schedule the
1238          * work with no reserved_chanctx so verify chandef to check if it
1239          * completed successfully
1240          */
1241
1242         if (sdata->reserved_chanctx) {
1243                 /*
1244                  * with multi-vif csa driver may call ieee80211_csa_finish()
1245                  * many times while waiting for other interfaces to use their
1246                  * reservations
1247                  */
1248                 if (sdata->reserved_ready)
1249                         goto out;
1250
1251                 ret = ieee80211_vif_use_reserved_context(sdata);
1252                 if (ret) {
1253                         sdata_info(sdata,
1254                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1255                                    ret);
1256                         ieee80211_queue_work(&sdata->local->hw,
1257                                              &ifmgd->csa_connection_drop_work);
1258                         goto out;
1259                 }
1260
1261                 goto out;
1262         }
1263
1264         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1265                                         &sdata->csa_chandef)) {
1266                 sdata_info(sdata,
1267                            "failed to finalize channel switch, disconnecting\n");
1268                 ieee80211_queue_work(&sdata->local->hw,
1269                                      &ifmgd->csa_connection_drop_work);
1270                 goto out;
1271         }
1272
1273         ifmgd->csa_waiting_bcn = true;
1274
1275         ieee80211_sta_reset_beacon_monitor(sdata);
1276         ieee80211_sta_reset_conn_monitor(sdata);
1277
1278 out:
1279         mutex_unlock(&local->chanctx_mtx);
1280         mutex_unlock(&local->mtx);
1281         sdata_unlock(sdata);
1282 }
1283
1284 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1285 {
1286         struct ieee80211_local *local = sdata->local;
1287         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1288         int ret;
1289
1290         sdata_assert_lock(sdata);
1291
1292         WARN_ON(!sdata->vif.csa_active);
1293
1294         if (sdata->csa_block_tx) {
1295                 ieee80211_wake_vif_queues(local, sdata,
1296                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1297                 sdata->csa_block_tx = false;
1298         }
1299
1300         sdata->vif.csa_active = false;
1301         ifmgd->csa_waiting_bcn = false;
1302         /*
1303          * If the CSA IE is still present on the beacon after the switch,
1304          * we need to consider it as a new CSA (possibly to self).
1305          */
1306         ifmgd->beacon_crc_valid = false;
1307
1308         ret = drv_post_channel_switch(sdata);
1309         if (ret) {
1310                 sdata_info(sdata,
1311                            "driver post channel switch failed, disconnecting\n");
1312                 ieee80211_queue_work(&local->hw,
1313                                      &ifmgd->csa_connection_drop_work);
1314                 return;
1315         }
1316
1317         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1318 }
1319
1320 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1321 {
1322         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1323         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1324
1325         trace_api_chswitch_done(sdata, success);
1326         if (!success) {
1327                 sdata_info(sdata,
1328                            "driver channel switch failed, disconnecting\n");
1329                 ieee80211_queue_work(&sdata->local->hw,
1330                                      &ifmgd->csa_connection_drop_work);
1331         } else {
1332                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1333         }
1334 }
1335 EXPORT_SYMBOL(ieee80211_chswitch_done);
1336
1337 static void ieee80211_chswitch_timer(struct timer_list *t)
1338 {
1339         struct ieee80211_sub_if_data *sdata =
1340                 from_timer(sdata, t, u.mgd.chswitch_timer);
1341
1342         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1343 }
1344
1345 static void
1346 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1347 {
1348         struct ieee80211_local *local = sdata->local;
1349
1350         if (!local->ops->abort_channel_switch)
1351                 return;
1352
1353         mutex_lock(&local->mtx);
1354
1355         mutex_lock(&local->chanctx_mtx);
1356         ieee80211_vif_unreserve_chanctx(sdata);
1357         mutex_unlock(&local->chanctx_mtx);
1358
1359         if (sdata->csa_block_tx)
1360                 ieee80211_wake_vif_queues(local, sdata,
1361                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1362
1363         sdata->csa_block_tx = false;
1364         sdata->vif.csa_active = false;
1365
1366         mutex_unlock(&local->mtx);
1367
1368         drv_abort_channel_switch(sdata);
1369 }
1370
1371 static void
1372 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1373                                  u64 timestamp, u32 device_timestamp,
1374                                  struct ieee802_11_elems *elems,
1375                                  bool beacon)
1376 {
1377         struct ieee80211_local *local = sdata->local;
1378         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1379         struct cfg80211_bss *cbss = ifmgd->associated;
1380         struct ieee80211_chanctx_conf *conf;
1381         struct ieee80211_chanctx *chanctx;
1382         enum nl80211_band current_band;
1383         struct ieee80211_csa_ie csa_ie;
1384         struct ieee80211_channel_switch ch_switch;
1385         struct ieee80211_bss *bss;
1386         int res;
1387
1388         sdata_assert_lock(sdata);
1389
1390         if (!cbss)
1391                 return;
1392
1393         if (local->scanning)
1394                 return;
1395
1396         current_band = cbss->channel->band;
1397         bss = (void *)cbss->priv;
1398         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1399                                            bss->vht_cap_info,
1400                                            ifmgd->flags,
1401                                            ifmgd->associated->bssid, &csa_ie);
1402
1403         if (!res) {
1404                 ch_switch.timestamp = timestamp;
1405                 ch_switch.device_timestamp = device_timestamp;
1406                 ch_switch.block_tx = csa_ie.mode;
1407                 ch_switch.chandef = csa_ie.chandef;
1408                 ch_switch.count = csa_ie.count;
1409                 ch_switch.delay = csa_ie.max_switch_time;
1410         }
1411
1412         if (res < 0)
1413                 goto lock_and_drop_connection;
1414
1415         if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1416                 if (res)
1417                         ieee80211_sta_abort_chanswitch(sdata);
1418                 else
1419                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1420                 return;
1421         } else if (sdata->vif.csa_active || res) {
1422                 /* disregard subsequent announcements if already processing */
1423                 return;
1424         }
1425
1426         if (sdata->vif.bss_conf.chandef.chan->band !=
1427             csa_ie.chandef.chan->band) {
1428                 sdata_info(sdata,
1429                            "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1430                            ifmgd->associated->bssid,
1431                            csa_ie.chandef.chan->center_freq,
1432                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1433                            csa_ie.chandef.center_freq2);
1434                 goto lock_and_drop_connection;
1435         }
1436
1437         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1438                                      IEEE80211_CHAN_DISABLED)) {
1439                 sdata_info(sdata,
1440                            "AP %pM switches to unsupported channel "
1441                            "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1442                            "disconnecting\n",
1443                            ifmgd->associated->bssid,
1444                            csa_ie.chandef.chan->center_freq,
1445                            csa_ie.chandef.chan->freq_offset,
1446                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1447                            csa_ie.chandef.freq1_offset,
1448                            csa_ie.chandef.center_freq2);
1449                 goto lock_and_drop_connection;
1450         }
1451
1452         if (cfg80211_chandef_identical(&csa_ie.chandef,
1453                                        &sdata->vif.bss_conf.chandef) &&
1454             (!csa_ie.mode || !beacon)) {
1455                 if (ifmgd->csa_ignored_same_chan)
1456                         return;
1457                 sdata_info(sdata,
1458                            "AP %pM tries to chanswitch to same channel, ignore\n",
1459                            ifmgd->associated->bssid);
1460                 ifmgd->csa_ignored_same_chan = true;
1461                 return;
1462         }
1463
1464         /*
1465          * Drop all TDLS peers - either we disconnect or move to a different
1466          * channel from this point on. There's no telling what our peer will do.
1467          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1468          * have an incompatible wider chandef.
1469          */
1470         ieee80211_teardown_tdls_peers(sdata);
1471
1472         mutex_lock(&local->mtx);
1473         mutex_lock(&local->chanctx_mtx);
1474         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1475                                          lockdep_is_held(&local->chanctx_mtx));
1476         if (!conf) {
1477                 sdata_info(sdata,
1478                            "no channel context assigned to vif?, disconnecting\n");
1479                 goto drop_connection;
1480         }
1481
1482         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1483
1484         if (local->use_chanctx &&
1485             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1486                 sdata_info(sdata,
1487                            "driver doesn't support chan-switch with channel contexts\n");
1488                 goto drop_connection;
1489         }
1490
1491         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1492                 sdata_info(sdata,
1493                            "preparing for channel switch failed, disconnecting\n");
1494                 goto drop_connection;
1495         }
1496
1497         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1498                                             chanctx->mode, false);
1499         if (res) {
1500                 sdata_info(sdata,
1501                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1502                            res);
1503                 goto drop_connection;
1504         }
1505         mutex_unlock(&local->chanctx_mtx);
1506
1507         sdata->vif.csa_active = true;
1508         sdata->csa_chandef = csa_ie.chandef;
1509         sdata->csa_block_tx = csa_ie.mode;
1510         ifmgd->csa_ignored_same_chan = false;
1511         ifmgd->beacon_crc_valid = false;
1512
1513         if (sdata->csa_block_tx)
1514                 ieee80211_stop_vif_queues(local, sdata,
1515                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1516         mutex_unlock(&local->mtx);
1517
1518         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1519                                           csa_ie.count, csa_ie.mode);
1520
1521         if (local->ops->channel_switch) {
1522                 /* use driver's channel switch callback */
1523                 drv_channel_switch(local, sdata, &ch_switch);
1524                 return;
1525         }
1526
1527         /* channel switch handled in software */
1528         if (csa_ie.count <= 1)
1529                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1530         else
1531                 mod_timer(&ifmgd->chswitch_timer,
1532                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1533                                          cbss->beacon_interval));
1534         return;
1535  lock_and_drop_connection:
1536         mutex_lock(&local->mtx);
1537         mutex_lock(&local->chanctx_mtx);
1538  drop_connection:
1539         /*
1540          * This is just so that the disconnect flow will know that
1541          * we were trying to switch channel and failed. In case the
1542          * mode is 1 (we are not allowed to Tx), we will know not to
1543          * send a deauthentication frame. Those two fields will be
1544          * reset when the disconnection worker runs.
1545          */
1546         sdata->vif.csa_active = true;
1547         sdata->csa_block_tx = csa_ie.mode;
1548
1549         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1550         mutex_unlock(&local->chanctx_mtx);
1551         mutex_unlock(&local->mtx);
1552 }
1553
1554 static bool
1555 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1556                                  struct ieee80211_channel *channel,
1557                                  const u8 *country_ie, u8 country_ie_len,
1558                                  const u8 *pwr_constr_elem,
1559                                  int *chan_pwr, int *pwr_reduction)
1560 {
1561         struct ieee80211_country_ie_triplet *triplet;
1562         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1563         int i, chan_increment;
1564         bool have_chan_pwr = false;
1565
1566         /* Invalid IE */
1567         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1568                 return false;
1569
1570         triplet = (void *)(country_ie + 3);
1571         country_ie_len -= 3;
1572
1573         switch (channel->band) {
1574         default:
1575                 WARN_ON_ONCE(1);
1576                 fallthrough;
1577         case NL80211_BAND_2GHZ:
1578         case NL80211_BAND_60GHZ:
1579         case NL80211_BAND_LC:
1580                 chan_increment = 1;
1581                 break;
1582         case NL80211_BAND_5GHZ:
1583                 chan_increment = 4;
1584                 break;
1585         case NL80211_BAND_6GHZ:
1586                 /*
1587                  * In the 6 GHz band, the "maximum transmit power level"
1588                  * field in the triplets is reserved, and thus will be
1589                  * zero and we shouldn't use it to control TX power.
1590                  * The actual TX power will be given in the transmit
1591                  * power envelope element instead.
1592                  */
1593                 return false;
1594         }
1595
1596         /* find channel */
1597         while (country_ie_len >= 3) {
1598                 u8 first_channel = triplet->chans.first_channel;
1599
1600                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1601                         goto next;
1602
1603                 for (i = 0; i < triplet->chans.num_channels; i++) {
1604                         if (first_channel + i * chan_increment == chan) {
1605                                 have_chan_pwr = true;
1606                                 *chan_pwr = triplet->chans.max_power;
1607                                 break;
1608                         }
1609                 }
1610                 if (have_chan_pwr)
1611                         break;
1612
1613  next:
1614                 triplet++;
1615                 country_ie_len -= 3;
1616         }
1617
1618         if (have_chan_pwr && pwr_constr_elem)
1619                 *pwr_reduction = *pwr_constr_elem;
1620         else
1621                 *pwr_reduction = 0;
1622
1623         return have_chan_pwr;
1624 }
1625
1626 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1627                                       struct ieee80211_channel *channel,
1628                                       const u8 *cisco_dtpc_ie,
1629                                       int *pwr_level)
1630 {
1631         /* From practical testing, the first data byte of the DTPC element
1632          * seems to contain the requested dBm level, and the CLI on Cisco
1633          * APs clearly state the range is -127 to 127 dBm, which indicates
1634          * a signed byte, although it seemingly never actually goes negative.
1635          * The other byte seems to always be zero.
1636          */
1637         *pwr_level = (__s8)cisco_dtpc_ie[4];
1638 }
1639
1640 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1641                                        struct ieee80211_channel *channel,
1642                                        struct ieee80211_mgmt *mgmt,
1643                                        const u8 *country_ie, u8 country_ie_len,
1644                                        const u8 *pwr_constr_ie,
1645                                        const u8 *cisco_dtpc_ie)
1646 {
1647         bool has_80211h_pwr = false, has_cisco_pwr = false;
1648         int chan_pwr = 0, pwr_reduction_80211h = 0;
1649         int pwr_level_cisco, pwr_level_80211h;
1650         int new_ap_level;
1651         __le16 capab = mgmt->u.probe_resp.capab_info;
1652
1653         if (ieee80211_is_s1g_beacon(mgmt->frame_control))
1654                 return 0;       /* TODO */
1655
1656         if (country_ie &&
1657             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1658              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1659                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1660                         sdata, channel, country_ie, country_ie_len,
1661                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1662                 pwr_level_80211h =
1663                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1664         }
1665
1666         if (cisco_dtpc_ie) {
1667                 ieee80211_find_cisco_dtpc(
1668                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1669                 has_cisco_pwr = true;
1670         }
1671
1672         if (!has_80211h_pwr && !has_cisco_pwr)
1673                 return 0;
1674
1675         /* If we have both 802.11h and Cisco DTPC, apply both limits
1676          * by picking the smallest of the two power levels advertised.
1677          */
1678         if (has_80211h_pwr &&
1679             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1680                 new_ap_level = pwr_level_80211h;
1681
1682                 if (sdata->ap_power_level == new_ap_level)
1683                         return 0;
1684
1685                 sdata_dbg(sdata,
1686                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1687                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1688                           sdata->u.mgd.bssid);
1689         } else {  /* has_cisco_pwr is always true here. */
1690                 new_ap_level = pwr_level_cisco;
1691
1692                 if (sdata->ap_power_level == new_ap_level)
1693                         return 0;
1694
1695                 sdata_dbg(sdata,
1696                           "Limiting TX power to %d dBm as advertised by %pM\n",
1697                           pwr_level_cisco, sdata->u.mgd.bssid);
1698         }
1699
1700         sdata->ap_power_level = new_ap_level;
1701         if (__ieee80211_recalc_txpower(sdata))
1702                 return BSS_CHANGED_TXPOWER;
1703         return 0;
1704 }
1705
1706 /* powersave */
1707 static void ieee80211_enable_ps(struct ieee80211_local *local,
1708                                 struct ieee80211_sub_if_data *sdata)
1709 {
1710         struct ieee80211_conf *conf = &local->hw.conf;
1711
1712         /*
1713          * If we are scanning right now then the parameters will
1714          * take effect when scan finishes.
1715          */
1716         if (local->scanning)
1717                 return;
1718
1719         if (conf->dynamic_ps_timeout > 0 &&
1720             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1721                 mod_timer(&local->dynamic_ps_timer, jiffies +
1722                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1723         } else {
1724                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1725                         ieee80211_send_nullfunc(local, sdata, true);
1726
1727                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1728                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1729                         return;
1730
1731                 conf->flags |= IEEE80211_CONF_PS;
1732                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1733         }
1734 }
1735
1736 static void ieee80211_change_ps(struct ieee80211_local *local)
1737 {
1738         struct ieee80211_conf *conf = &local->hw.conf;
1739
1740         if (local->ps_sdata) {
1741                 ieee80211_enable_ps(local, local->ps_sdata);
1742         } else if (conf->flags & IEEE80211_CONF_PS) {
1743                 conf->flags &= ~IEEE80211_CONF_PS;
1744                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1745                 del_timer_sync(&local->dynamic_ps_timer);
1746                 cancel_work_sync(&local->dynamic_ps_enable_work);
1747         }
1748 }
1749
1750 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1751 {
1752         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1753         struct sta_info *sta = NULL;
1754         bool authorized = false;
1755
1756         if (!mgd->powersave)
1757                 return false;
1758
1759         if (mgd->broken_ap)
1760                 return false;
1761
1762         if (!mgd->associated)
1763                 return false;
1764
1765         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1766                 return false;
1767
1768         if (!mgd->have_beacon)
1769                 return false;
1770
1771         rcu_read_lock();
1772         sta = sta_info_get(sdata, mgd->bssid);
1773         if (sta)
1774                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1775         rcu_read_unlock();
1776
1777         return authorized;
1778 }
1779
1780 /* need to hold RTNL or interface lock */
1781 void ieee80211_recalc_ps(struct ieee80211_local *local)
1782 {
1783         struct ieee80211_sub_if_data *sdata, *found = NULL;
1784         int count = 0;
1785         int timeout;
1786
1787         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1788                 local->ps_sdata = NULL;
1789                 return;
1790         }
1791
1792         list_for_each_entry(sdata, &local->interfaces, list) {
1793                 if (!ieee80211_sdata_running(sdata))
1794                         continue;
1795                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1796                         /* If an AP vif is found, then disable PS
1797                          * by setting the count to zero thereby setting
1798                          * ps_sdata to NULL.
1799                          */
1800                         count = 0;
1801                         break;
1802                 }
1803                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1804                         continue;
1805                 found = sdata;
1806                 count++;
1807         }
1808
1809         if (count == 1 && ieee80211_powersave_allowed(found)) {
1810                 u8 dtimper = found->u.mgd.dtim_period;
1811
1812                 timeout = local->dynamic_ps_forced_timeout;
1813                 if (timeout < 0)
1814                         timeout = 100;
1815                 local->hw.conf.dynamic_ps_timeout = timeout;
1816
1817                 /* If the TIM IE is invalid, pretend the value is 1 */
1818                 if (!dtimper)
1819                         dtimper = 1;
1820
1821                 local->hw.conf.ps_dtim_period = dtimper;
1822                 local->ps_sdata = found;
1823         } else {
1824                 local->ps_sdata = NULL;
1825         }
1826
1827         ieee80211_change_ps(local);
1828 }
1829
1830 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1831 {
1832         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1833
1834         if (sdata->vif.bss_conf.ps != ps_allowed) {
1835                 sdata->vif.bss_conf.ps = ps_allowed;
1836                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1837         }
1838 }
1839
1840 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1841 {
1842         struct ieee80211_local *local =
1843                 container_of(work, struct ieee80211_local,
1844                              dynamic_ps_disable_work);
1845
1846         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1847                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1848                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1849         }
1850
1851         ieee80211_wake_queues_by_reason(&local->hw,
1852                                         IEEE80211_MAX_QUEUE_MAP,
1853                                         IEEE80211_QUEUE_STOP_REASON_PS,
1854                                         false);
1855 }
1856
1857 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1858 {
1859         struct ieee80211_local *local =
1860                 container_of(work, struct ieee80211_local,
1861                              dynamic_ps_enable_work);
1862         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1863         struct ieee80211_if_managed *ifmgd;
1864         unsigned long flags;
1865         int q;
1866
1867         /* can only happen when PS was just disabled anyway */
1868         if (!sdata)
1869                 return;
1870
1871         ifmgd = &sdata->u.mgd;
1872
1873         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1874                 return;
1875
1876         if (local->hw.conf.dynamic_ps_timeout > 0) {
1877                 /* don't enter PS if TX frames are pending */
1878                 if (drv_tx_frames_pending(local)) {
1879                         mod_timer(&local->dynamic_ps_timer, jiffies +
1880                                   msecs_to_jiffies(
1881                                   local->hw.conf.dynamic_ps_timeout));
1882                         return;
1883                 }
1884
1885                 /*
1886                  * transmission can be stopped by others which leads to
1887                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1888                  * is not the actual idle state.
1889                  */
1890                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1891                 for (q = 0; q < local->hw.queues; q++) {
1892                         if (local->queue_stop_reasons[q]) {
1893                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1894                                                        flags);
1895                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1896                                           msecs_to_jiffies(
1897                                           local->hw.conf.dynamic_ps_timeout));
1898                                 return;
1899                         }
1900                 }
1901                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1902         }
1903
1904         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1905             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1906                 if (drv_tx_frames_pending(local)) {
1907                         mod_timer(&local->dynamic_ps_timer, jiffies +
1908                                   msecs_to_jiffies(
1909                                   local->hw.conf.dynamic_ps_timeout));
1910                 } else {
1911                         ieee80211_send_nullfunc(local, sdata, true);
1912                         /* Flush to get the tx status of nullfunc frame */
1913                         ieee80211_flush_queues(local, sdata, false);
1914                 }
1915         }
1916
1917         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1918               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1919             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1920                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1921                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1922                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1923         }
1924 }
1925
1926 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1927 {
1928         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1929
1930         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1931 }
1932
1933 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1934 {
1935         struct delayed_work *delayed_work = to_delayed_work(work);
1936         struct ieee80211_sub_if_data *sdata =
1937                 container_of(delayed_work, struct ieee80211_sub_if_data,
1938                              dfs_cac_timer_work);
1939         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1940
1941         mutex_lock(&sdata->local->mtx);
1942         if (sdata->wdev.cac_started) {
1943                 ieee80211_vif_release_channel(sdata);
1944                 cfg80211_cac_event(sdata->dev, &chandef,
1945                                    NL80211_RADAR_CAC_FINISHED,
1946                                    GFP_KERNEL);
1947         }
1948         mutex_unlock(&sdata->local->mtx);
1949 }
1950
1951 static bool
1952 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1953 {
1954         struct ieee80211_local *local = sdata->local;
1955         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1956         bool ret = false;
1957         int ac;
1958
1959         if (local->hw.queues < IEEE80211_NUM_ACS)
1960                 return false;
1961
1962         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1963                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1964                 int non_acm_ac;
1965                 unsigned long now = jiffies;
1966
1967                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1968                     tx_tspec->admitted_time &&
1969                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1970                         tx_tspec->consumed_tx_time = 0;
1971                         tx_tspec->time_slice_start = now;
1972
1973                         if (tx_tspec->downgraded)
1974                                 tx_tspec->action =
1975                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1976                 }
1977
1978                 switch (tx_tspec->action) {
1979                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1980                         /* take the original parameters */
1981                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1982                                 sdata_err(sdata,
1983                                           "failed to set TX queue parameters for queue %d\n",
1984                                           ac);
1985                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1986                         tx_tspec->downgraded = false;
1987                         ret = true;
1988                         break;
1989                 case TX_TSPEC_ACTION_DOWNGRADE:
1990                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1991                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1992                                 ret = true;
1993                                 break;
1994                         }
1995                         /* downgrade next lower non-ACM AC */
1996                         for (non_acm_ac = ac + 1;
1997                              non_acm_ac < IEEE80211_NUM_ACS;
1998                              non_acm_ac++)
1999                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
2000                                         break;
2001                         /* Usually the loop will result in using BK even if it
2002                          * requires admission control, but such a configuration
2003                          * makes no sense and we have to transmit somehow - the
2004                          * AC selection does the same thing.
2005                          * If we started out trying to downgrade from BK, then
2006                          * the extra condition here might be needed.
2007                          */
2008                         if (non_acm_ac >= IEEE80211_NUM_ACS)
2009                                 non_acm_ac = IEEE80211_AC_BK;
2010                         if (drv_conf_tx(local, sdata, ac,
2011                                         &sdata->tx_conf[non_acm_ac]))
2012                                 sdata_err(sdata,
2013                                           "failed to set TX queue parameters for queue %d\n",
2014                                           ac);
2015                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
2016                         ret = true;
2017                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
2018                                 tx_tspec->time_slice_start + HZ - now + 1);
2019                         break;
2020                 case TX_TSPEC_ACTION_NONE:
2021                         /* nothing now */
2022                         break;
2023                 }
2024         }
2025
2026         return ret;
2027 }
2028
2029 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2030 {
2031         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2032                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
2033 }
2034
2035 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
2036 {
2037         struct ieee80211_sub_if_data *sdata;
2038
2039         sdata = container_of(work, struct ieee80211_sub_if_data,
2040                              u.mgd.tx_tspec_wk.work);
2041         ieee80211_sta_handle_tspec_ac_params(sdata);
2042 }
2043
2044 /* MLME */
2045 static bool
2046 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2047                          struct ieee80211_sub_if_data *sdata,
2048                          const u8 *wmm_param, size_t wmm_param_len,
2049                          const struct ieee80211_mu_edca_param_set *mu_edca)
2050 {
2051         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2052         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2053         size_t left;
2054         int count, mu_edca_count, ac;
2055         const u8 *pos;
2056         u8 uapsd_queues = 0;
2057
2058         if (!local->ops->conf_tx)
2059                 return false;
2060
2061         if (local->hw.queues < IEEE80211_NUM_ACS)
2062                 return false;
2063
2064         if (!wmm_param)
2065                 return false;
2066
2067         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2068                 return false;
2069
2070         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2071                 uapsd_queues = ifmgd->uapsd_queues;
2072
2073         count = wmm_param[6] & 0x0f;
2074         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2075          * if mu_edca was preset before and now it disappeared tell
2076          * the driver about it.
2077          */
2078         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2079         if (count == ifmgd->wmm_last_param_set &&
2080             mu_edca_count == ifmgd->mu_edca_last_param_set)
2081                 return false;
2082         ifmgd->wmm_last_param_set = count;
2083         ifmgd->mu_edca_last_param_set = mu_edca_count;
2084
2085         pos = wmm_param + 8;
2086         left = wmm_param_len - 8;
2087
2088         memset(&params, 0, sizeof(params));
2089
2090         sdata->wmm_acm = 0;
2091         for (; left >= 4; left -= 4, pos += 4) {
2092                 int aci = (pos[0] >> 5) & 0x03;
2093                 int acm = (pos[0] >> 4) & 0x01;
2094                 bool uapsd = false;
2095
2096                 switch (aci) {
2097                 case 1: /* AC_BK */
2098                         ac = IEEE80211_AC_BK;
2099                         if (acm)
2100                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2101                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2102                                 uapsd = true;
2103                         params[ac].mu_edca = !!mu_edca;
2104                         if (mu_edca)
2105                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2106                         break;
2107                 case 2: /* AC_VI */
2108                         ac = IEEE80211_AC_VI;
2109                         if (acm)
2110                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2111                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2112                                 uapsd = true;
2113                         params[ac].mu_edca = !!mu_edca;
2114                         if (mu_edca)
2115                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2116                         break;
2117                 case 3: /* AC_VO */
2118                         ac = IEEE80211_AC_VO;
2119                         if (acm)
2120                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2121                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2122                                 uapsd = true;
2123                         params[ac].mu_edca = !!mu_edca;
2124                         if (mu_edca)
2125                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2126                         break;
2127                 case 0: /* AC_BE */
2128                 default:
2129                         ac = IEEE80211_AC_BE;
2130                         if (acm)
2131                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2132                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2133                                 uapsd = true;
2134                         params[ac].mu_edca = !!mu_edca;
2135                         if (mu_edca)
2136                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2137                         break;
2138                 }
2139
2140                 params[ac].aifs = pos[0] & 0x0f;
2141
2142                 if (params[ac].aifs < 2) {
2143                         sdata_info(sdata,
2144                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2145                                    params[ac].aifs, aci);
2146                         params[ac].aifs = 2;
2147                 }
2148                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2149                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2150                 params[ac].txop = get_unaligned_le16(pos + 2);
2151                 params[ac].acm = acm;
2152                 params[ac].uapsd = uapsd;
2153
2154                 if (params[ac].cw_min == 0 ||
2155                     params[ac].cw_min > params[ac].cw_max) {
2156                         sdata_info(sdata,
2157                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2158                                    params[ac].cw_min, params[ac].cw_max, aci);
2159                         return false;
2160                 }
2161                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2162         }
2163
2164         /* WMM specification requires all 4 ACIs. */
2165         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2166                 if (params[ac].cw_min == 0) {
2167                         sdata_info(sdata,
2168                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2169                                    ac);
2170                         return false;
2171                 }
2172         }
2173
2174         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2175                 mlme_dbg(sdata,
2176                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2177                          ac, params[ac].acm,
2178                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2179                          params[ac].txop, params[ac].uapsd,
2180                          ifmgd->tx_tspec[ac].downgraded);
2181                 sdata->tx_conf[ac] = params[ac];
2182                 if (!ifmgd->tx_tspec[ac].downgraded &&
2183                     drv_conf_tx(local, sdata, ac, &params[ac]))
2184                         sdata_err(sdata,
2185                                   "failed to set TX queue parameters for AC %d\n",
2186                                   ac);
2187         }
2188
2189         /* enable WMM or activate new settings */
2190         sdata->vif.bss_conf.qos = true;
2191         return true;
2192 }
2193
2194 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2195 {
2196         lockdep_assert_held(&sdata->local->mtx);
2197
2198         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2199         ieee80211_run_deferred_scan(sdata->local);
2200 }
2201
2202 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2203 {
2204         mutex_lock(&sdata->local->mtx);
2205         __ieee80211_stop_poll(sdata);
2206         mutex_unlock(&sdata->local->mtx);
2207 }
2208
2209 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2210                                            u16 capab, bool erp_valid, u8 erp)
2211 {
2212         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2213         struct ieee80211_supported_band *sband;
2214         u32 changed = 0;
2215         bool use_protection;
2216         bool use_short_preamble;
2217         bool use_short_slot;
2218
2219         sband = ieee80211_get_sband(sdata);
2220         if (!sband)
2221                 return changed;
2222
2223         if (erp_valid) {
2224                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2225                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2226         } else {
2227                 use_protection = false;
2228                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2229         }
2230
2231         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2232         if (sband->band == NL80211_BAND_5GHZ ||
2233             sband->band == NL80211_BAND_6GHZ)
2234                 use_short_slot = true;
2235
2236         if (use_protection != bss_conf->use_cts_prot) {
2237                 bss_conf->use_cts_prot = use_protection;
2238                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2239         }
2240
2241         if (use_short_preamble != bss_conf->use_short_preamble) {
2242                 bss_conf->use_short_preamble = use_short_preamble;
2243                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2244         }
2245
2246         if (use_short_slot != bss_conf->use_short_slot) {
2247                 bss_conf->use_short_slot = use_short_slot;
2248                 changed |= BSS_CHANGED_ERP_SLOT;
2249         }
2250
2251         return changed;
2252 }
2253
2254 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2255                                      struct cfg80211_bss *cbss,
2256                                      u32 bss_info_changed)
2257 {
2258         struct ieee80211_bss *bss = (void *)cbss->priv;
2259         struct ieee80211_local *local = sdata->local;
2260         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2261
2262         bss_info_changed |= BSS_CHANGED_ASSOC;
2263         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2264                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2265
2266         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2267                 beacon_loss_count * bss_conf->beacon_int));
2268
2269         sdata->u.mgd.associated = cbss;
2270         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2271
2272         ieee80211_check_rate_mask(sdata);
2273
2274         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2275
2276         if (sdata->vif.p2p ||
2277             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2278                 const struct cfg80211_bss_ies *ies;
2279
2280                 rcu_read_lock();
2281                 ies = rcu_dereference(cbss->ies);
2282                 if (ies) {
2283                         int ret;
2284
2285                         ret = cfg80211_get_p2p_attr(
2286                                         ies->data, ies->len,
2287                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2288                                         (u8 *) &bss_conf->p2p_noa_attr,
2289                                         sizeof(bss_conf->p2p_noa_attr));
2290                         if (ret >= 2) {
2291                                 sdata->u.mgd.p2p_noa_index =
2292                                         bss_conf->p2p_noa_attr.index;
2293                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2294                         }
2295                 }
2296                 rcu_read_unlock();
2297         }
2298
2299         /* just to be sure */
2300         ieee80211_stop_poll(sdata);
2301
2302         ieee80211_led_assoc(local, 1);
2303
2304         if (sdata->u.mgd.have_beacon) {
2305                 /*
2306                  * If the AP is buggy we may get here with no DTIM period
2307                  * known, so assume it's 1 which is the only safe assumption
2308                  * in that case, although if the TIM IE is broken powersave
2309                  * probably just won't work at all.
2310                  */
2311                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2312                 bss_conf->beacon_rate = bss->beacon_rate;
2313                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2314         } else {
2315                 bss_conf->beacon_rate = NULL;
2316                 bss_conf->dtim_period = 0;
2317         }
2318
2319         bss_conf->assoc = 1;
2320
2321         /* Tell the driver to monitor connection quality (if supported) */
2322         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2323             bss_conf->cqm_rssi_thold)
2324                 bss_info_changed |= BSS_CHANGED_CQM;
2325
2326         /* Enable ARP filtering */
2327         if (bss_conf->arp_addr_cnt)
2328                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2329
2330         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2331
2332         mutex_lock(&local->iflist_mtx);
2333         ieee80211_recalc_ps(local);
2334         mutex_unlock(&local->iflist_mtx);
2335
2336         ieee80211_recalc_smps(sdata);
2337         ieee80211_recalc_ps_vif(sdata);
2338
2339         netif_carrier_on(sdata->dev);
2340 }
2341
2342 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2343                                    u16 stype, u16 reason, bool tx,
2344                                    u8 *frame_buf)
2345 {
2346         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2347         struct ieee80211_local *local = sdata->local;
2348         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2349         u32 changed = 0;
2350         struct ieee80211_prep_tx_info info = {
2351                 .subtype = stype,
2352         };
2353
2354         sdata_assert_lock(sdata);
2355
2356         if (WARN_ON_ONCE(tx && !frame_buf))
2357                 return;
2358
2359         if (WARN_ON(!ifmgd->associated))
2360                 return;
2361
2362         ieee80211_stop_poll(sdata);
2363
2364         ifmgd->associated = NULL;
2365         netif_carrier_off(sdata->dev);
2366
2367         /*
2368          * if we want to get out of ps before disassoc (why?) we have
2369          * to do it before sending disassoc, as otherwise the null-packet
2370          * won't be valid.
2371          */
2372         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2373                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2374                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2375         }
2376         local->ps_sdata = NULL;
2377
2378         /* disable per-vif ps */
2379         ieee80211_recalc_ps_vif(sdata);
2380
2381         /* make sure ongoing transmission finishes */
2382         synchronize_net();
2383
2384         /*
2385          * drop any frame before deauth/disassoc, this can be data or
2386          * management frame. Since we are disconnecting, we should not
2387          * insist sending these frames which can take time and delay
2388          * the disconnection and possible the roaming.
2389          */
2390         if (tx)
2391                 ieee80211_flush_queues(local, sdata, true);
2392
2393         /* deauthenticate/disassociate now */
2394         if (tx || frame_buf) {
2395                 /*
2396                  * In multi channel scenarios guarantee that the virtual
2397                  * interface is granted immediate airtime to transmit the
2398                  * deauthentication frame by calling mgd_prepare_tx, if the
2399                  * driver requested so.
2400                  */
2401                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2402                     !ifmgd->have_beacon) {
2403                         drv_mgd_prepare_tx(sdata->local, sdata, &info);
2404                 }
2405
2406                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2407                                                ifmgd->bssid, stype, reason,
2408                                                tx, frame_buf);
2409         }
2410
2411         /* flush out frame - make sure the deauth was actually sent */
2412         if (tx)
2413                 ieee80211_flush_queues(local, sdata, false);
2414
2415         drv_mgd_complete_tx(sdata->local, sdata, &info);
2416
2417         /* clear bssid only after building the needed mgmt frames */
2418         eth_zero_addr(ifmgd->bssid);
2419
2420         sdata->vif.bss_conf.ssid_len = 0;
2421
2422         /* remove AP and TDLS peers */
2423         sta_info_flush(sdata);
2424
2425         /* finally reset all BSS / config parameters */
2426         changed |= ieee80211_reset_erp_info(sdata);
2427
2428         ieee80211_led_assoc(local, 0);
2429         changed |= BSS_CHANGED_ASSOC;
2430         sdata->vif.bss_conf.assoc = false;
2431
2432         ifmgd->p2p_noa_index = -1;
2433         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2434                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2435
2436         /* on the next assoc, re-program HT/VHT parameters */
2437         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2438         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2439         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2440         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2441
2442         /* reset MU-MIMO ownership and group data */
2443         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2444                sizeof(sdata->vif.bss_conf.mu_group.membership));
2445         memset(sdata->vif.bss_conf.mu_group.position, 0,
2446                sizeof(sdata->vif.bss_conf.mu_group.position));
2447         changed |= BSS_CHANGED_MU_GROUPS;
2448         sdata->vif.mu_mimo_owner = false;
2449
2450         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2451
2452         del_timer_sync(&local->dynamic_ps_timer);
2453         cancel_work_sync(&local->dynamic_ps_enable_work);
2454
2455         /* Disable ARP filtering */
2456         if (sdata->vif.bss_conf.arp_addr_cnt)
2457                 changed |= BSS_CHANGED_ARP_FILTER;
2458
2459         sdata->vif.bss_conf.qos = false;
2460         changed |= BSS_CHANGED_QOS;
2461
2462         /* The BSSID (not really interesting) and HT changed */
2463         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2464         ieee80211_bss_info_change_notify(sdata, changed);
2465
2466         /* disassociated - set to defaults now */
2467         ieee80211_set_wmm_default(sdata, false, false);
2468
2469         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2470         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2471         del_timer_sync(&sdata->u.mgd.timer);
2472         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2473
2474         sdata->vif.bss_conf.dtim_period = 0;
2475         sdata->vif.bss_conf.beacon_rate = NULL;
2476
2477         ifmgd->have_beacon = false;
2478
2479         ifmgd->flags = 0;
2480         mutex_lock(&local->mtx);
2481         ieee80211_vif_release_channel(sdata);
2482
2483         sdata->vif.csa_active = false;
2484         ifmgd->csa_waiting_bcn = false;
2485         ifmgd->csa_ignored_same_chan = false;
2486         if (sdata->csa_block_tx) {
2487                 ieee80211_wake_vif_queues(local, sdata,
2488                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2489                 sdata->csa_block_tx = false;
2490         }
2491         mutex_unlock(&local->mtx);
2492
2493         /* existing TX TSPEC sessions no longer exist */
2494         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2495         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2496
2497         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2498
2499         bss_conf->pwr_reduction = 0;
2500         bss_conf->tx_pwr_env_num = 0;
2501         memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env));
2502 }
2503
2504 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2505 {
2506         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2507         struct ieee80211_local *local = sdata->local;
2508
2509         mutex_lock(&local->mtx);
2510         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2511                 goto out;
2512
2513         __ieee80211_stop_poll(sdata);
2514
2515         mutex_lock(&local->iflist_mtx);
2516         ieee80211_recalc_ps(local);
2517         mutex_unlock(&local->iflist_mtx);
2518
2519         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2520                 goto out;
2521
2522         /*
2523          * We've received a probe response, but are not sure whether
2524          * we have or will be receiving any beacons or data, so let's
2525          * schedule the timers again, just in case.
2526          */
2527         ieee80211_sta_reset_beacon_monitor(sdata);
2528
2529         mod_timer(&ifmgd->conn_mon_timer,
2530                   round_jiffies_up(jiffies +
2531                                    IEEE80211_CONNECTION_IDLE_TIME));
2532 out:
2533         mutex_unlock(&local->mtx);
2534 }
2535
2536 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2537                                            struct ieee80211_hdr *hdr,
2538                                            u16 tx_time)
2539 {
2540         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2541         u16 tid;
2542         int ac;
2543         struct ieee80211_sta_tx_tspec *tx_tspec;
2544         unsigned long now = jiffies;
2545
2546         if (!ieee80211_is_data_qos(hdr->frame_control))
2547                 return;
2548
2549         tid = ieee80211_get_tid(hdr);
2550         ac = ieee80211_ac_from_tid(tid);
2551         tx_tspec = &ifmgd->tx_tspec[ac];
2552
2553         if (likely(!tx_tspec->admitted_time))
2554                 return;
2555
2556         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2557                 tx_tspec->consumed_tx_time = 0;
2558                 tx_tspec->time_slice_start = now;
2559
2560                 if (tx_tspec->downgraded) {
2561                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2562                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2563                 }
2564         }
2565
2566         if (tx_tspec->downgraded)
2567                 return;
2568
2569         tx_tspec->consumed_tx_time += tx_time;
2570
2571         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2572                 tx_tspec->downgraded = true;
2573                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2574                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2575         }
2576 }
2577
2578 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2579                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2580 {
2581         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2582
2583         if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
2584             !sdata->u.mgd.probe_send_count)
2585                 return;
2586
2587         if (ack)
2588                 sdata->u.mgd.probe_send_count = 0;
2589         else
2590                 sdata->u.mgd.nullfunc_failed = true;
2591         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2592 }
2593
2594 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2595                                           const u8 *src, const u8 *dst,
2596                                           const u8 *ssid, size_t ssid_len,
2597                                           struct ieee80211_channel *channel)
2598 {
2599         struct sk_buff *skb;
2600
2601         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2602                                         ssid, ssid_len, NULL, 0,
2603                                         IEEE80211_PROBE_FLAG_DIRECTED);
2604         if (skb)
2605                 ieee80211_tx_skb(sdata, skb);
2606 }
2607
2608 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2609 {
2610         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2611         const struct element *ssid;
2612         u8 *dst = ifmgd->associated->bssid;
2613         u8 unicast_limit = max(1, max_probe_tries - 3);
2614         struct sta_info *sta;
2615
2616         /*
2617          * Try sending broadcast probe requests for the last three
2618          * probe requests after the first ones failed since some
2619          * buggy APs only support broadcast probe requests.
2620          */
2621         if (ifmgd->probe_send_count >= unicast_limit)
2622                 dst = NULL;
2623
2624         /*
2625          * When the hardware reports an accurate Tx ACK status, it's
2626          * better to send a nullfunc frame instead of a probe request,
2627          * as it will kick us off the AP quickly if we aren't associated
2628          * anymore. The timeout will be reset if the frame is ACKed by
2629          * the AP.
2630          */
2631         ifmgd->probe_send_count++;
2632
2633         if (dst) {
2634                 mutex_lock(&sdata->local->sta_mtx);
2635                 sta = sta_info_get(sdata, dst);
2636                 if (!WARN_ON(!sta))
2637                         ieee80211_check_fast_rx(sta);
2638                 mutex_unlock(&sdata->local->sta_mtx);
2639         }
2640
2641         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2642                 ifmgd->nullfunc_failed = false;
2643                 ieee80211_send_nullfunc(sdata->local, sdata, false);
2644         } else {
2645                 int ssid_len;
2646
2647                 rcu_read_lock();
2648                 ssid = ieee80211_bss_get_elem(ifmgd->associated, WLAN_EID_SSID);
2649                 if (WARN_ON_ONCE(ssid == NULL))
2650                         ssid_len = 0;
2651                 else
2652                         ssid_len = ssid->datalen;
2653
2654                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2655                                               ssid->data, ssid_len,
2656                                               ifmgd->associated->channel);
2657                 rcu_read_unlock();
2658         }
2659
2660         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2661         run_again(sdata, ifmgd->probe_timeout);
2662 }
2663
2664 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2665                                    bool beacon)
2666 {
2667         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2668         bool already = false;
2669
2670         if (!ieee80211_sdata_running(sdata))
2671                 return;
2672
2673         sdata_lock(sdata);
2674
2675         if (!ifmgd->associated)
2676                 goto out;
2677
2678         mutex_lock(&sdata->local->mtx);
2679
2680         if (sdata->local->tmp_channel || sdata->local->scanning) {
2681                 mutex_unlock(&sdata->local->mtx);
2682                 goto out;
2683         }
2684
2685         if (sdata->local->suspending) {
2686                 /* reschedule after resume */
2687                 mutex_unlock(&sdata->local->mtx);
2688                 ieee80211_reset_ap_probe(sdata);
2689                 goto out;
2690         }
2691
2692         if (beacon) {
2693                 mlme_dbg_ratelimited(sdata,
2694                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2695                                      beacon_loss_count);
2696
2697                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2698         }
2699
2700         /*
2701          * The driver/our work has already reported this event or the
2702          * connection monitoring has kicked in and we have already sent
2703          * a probe request. Or maybe the AP died and the driver keeps
2704          * reporting until we disassociate...
2705          *
2706          * In either case we have to ignore the current call to this
2707          * function (except for setting the correct probe reason bit)
2708          * because otherwise we would reset the timer every time and
2709          * never check whether we received a probe response!
2710          */
2711         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2712                 already = true;
2713
2714         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2715
2716         mutex_unlock(&sdata->local->mtx);
2717
2718         if (already)
2719                 goto out;
2720
2721         mutex_lock(&sdata->local->iflist_mtx);
2722         ieee80211_recalc_ps(sdata->local);
2723         mutex_unlock(&sdata->local->iflist_mtx);
2724
2725         ifmgd->probe_send_count = 0;
2726         ieee80211_mgd_probe_ap_send(sdata);
2727  out:
2728         sdata_unlock(sdata);
2729 }
2730
2731 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2732                                           struct ieee80211_vif *vif)
2733 {
2734         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2735         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2736         struct cfg80211_bss *cbss;
2737         struct sk_buff *skb;
2738         const struct element *ssid;
2739         int ssid_len;
2740
2741         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2742                 return NULL;
2743
2744         sdata_assert_lock(sdata);
2745
2746         if (ifmgd->associated)
2747                 cbss = ifmgd->associated;
2748         else if (ifmgd->auth_data)
2749                 cbss = ifmgd->auth_data->bss;
2750         else if (ifmgd->assoc_data)
2751                 cbss = ifmgd->assoc_data->bss;
2752         else
2753                 return NULL;
2754
2755         rcu_read_lock();
2756         ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
2757         if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
2758                       "invalid SSID element (len=%d)",
2759                       ssid ? ssid->datalen : -1))
2760                 ssid_len = 0;
2761         else
2762                 ssid_len = ssid->datalen;
2763
2764         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2765                                         (u32) -1, cbss->channel,
2766                                         ssid->data, ssid_len,
2767                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2768         rcu_read_unlock();
2769
2770         return skb;
2771 }
2772 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2773
2774 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2775                                         const u8 *buf, size_t len, bool tx,
2776                                         u16 reason, bool reconnect)
2777 {
2778         struct ieee80211_event event = {
2779                 .type = MLME_EVENT,
2780                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2781                 .u.mlme.reason = reason,
2782         };
2783
2784         if (tx)
2785                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
2786         else
2787                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2788
2789         drv_event_callback(sdata->local, sdata, &event);
2790 }
2791
2792 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2793 {
2794         struct ieee80211_local *local = sdata->local;
2795         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2796         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2797         bool tx;
2798
2799         sdata_lock(sdata);
2800         if (!ifmgd->associated) {
2801                 sdata_unlock(sdata);
2802                 return;
2803         }
2804
2805         tx = !sdata->csa_block_tx;
2806
2807         if (!ifmgd->driver_disconnect) {
2808                 /*
2809                  * AP is probably out of range (or not reachable for another
2810                  * reason) so remove the bss struct for that AP.
2811                  */
2812                 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2813         }
2814
2815         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2816                                ifmgd->driver_disconnect ?
2817                                         WLAN_REASON_DEAUTH_LEAVING :
2818                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2819                                tx, frame_buf);
2820         mutex_lock(&local->mtx);
2821         sdata->vif.csa_active = false;
2822         ifmgd->csa_waiting_bcn = false;
2823         if (sdata->csa_block_tx) {
2824                 ieee80211_wake_vif_queues(local, sdata,
2825                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2826                 sdata->csa_block_tx = false;
2827         }
2828         mutex_unlock(&local->mtx);
2829
2830         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2831                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2832                                     ifmgd->reconnect);
2833         ifmgd->reconnect = false;
2834
2835         sdata_unlock(sdata);
2836 }
2837
2838 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2839 {
2840         struct ieee80211_sub_if_data *sdata =
2841                 container_of(work, struct ieee80211_sub_if_data,
2842                              u.mgd.beacon_connection_loss_work);
2843         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2844
2845         if (ifmgd->associated)
2846                 ifmgd->beacon_loss_count++;
2847
2848         if (ifmgd->connection_loss) {
2849                 sdata_info(sdata, "Connection to AP %pM lost\n",
2850                            ifmgd->bssid);
2851                 __ieee80211_disconnect(sdata);
2852                 ifmgd->connection_loss = false;
2853         } else if (ifmgd->driver_disconnect) {
2854                 sdata_info(sdata,
2855                            "Driver requested disconnection from AP %pM\n",
2856                            ifmgd->bssid);
2857                 __ieee80211_disconnect(sdata);
2858                 ifmgd->driver_disconnect = false;
2859         } else {
2860                 ieee80211_mgd_probe_ap(sdata, true);
2861         }
2862 }
2863
2864 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2865 {
2866         struct ieee80211_sub_if_data *sdata =
2867                 container_of(work, struct ieee80211_sub_if_data,
2868                              u.mgd.csa_connection_drop_work);
2869
2870         __ieee80211_disconnect(sdata);
2871 }
2872
2873 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2874 {
2875         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2876         struct ieee80211_hw *hw = &sdata->local->hw;
2877
2878         trace_api_beacon_loss(sdata);
2879
2880         sdata->u.mgd.connection_loss = false;
2881         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2882 }
2883 EXPORT_SYMBOL(ieee80211_beacon_loss);
2884
2885 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2886 {
2887         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2888         struct ieee80211_hw *hw = &sdata->local->hw;
2889
2890         trace_api_connection_loss(sdata);
2891
2892         sdata->u.mgd.connection_loss = true;
2893         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2894 }
2895 EXPORT_SYMBOL(ieee80211_connection_loss);
2896
2897 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
2898 {
2899         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2900         struct ieee80211_hw *hw = &sdata->local->hw;
2901
2902         trace_api_disconnect(sdata, reconnect);
2903
2904         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2905                 return;
2906
2907         sdata->u.mgd.driver_disconnect = true;
2908         sdata->u.mgd.reconnect = reconnect;
2909         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2910 }
2911 EXPORT_SYMBOL(ieee80211_disconnect);
2912
2913 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2914                                         bool assoc)
2915 {
2916         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2917
2918         sdata_assert_lock(sdata);
2919
2920         if (!assoc) {
2921                 /*
2922                  * we are not authenticated yet, the only timer that could be
2923                  * running is the timeout for the authentication response which
2924                  * which is not relevant anymore.
2925                  */
2926                 del_timer_sync(&sdata->u.mgd.timer);
2927                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2928
2929                 eth_zero_addr(sdata->u.mgd.bssid);
2930                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2931                 sdata->u.mgd.flags = 0;
2932                 mutex_lock(&sdata->local->mtx);
2933                 ieee80211_vif_release_channel(sdata);
2934                 mutex_unlock(&sdata->local->mtx);
2935         }
2936
2937         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2938         kfree(auth_data);
2939         sdata->u.mgd.auth_data = NULL;
2940 }
2941
2942 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2943                                          bool assoc, bool abandon)
2944 {
2945         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2946
2947         sdata_assert_lock(sdata);
2948
2949         if (!assoc) {
2950                 /*
2951                  * we are not associated yet, the only timer that could be
2952                  * running is the timeout for the association response which
2953                  * which is not relevant anymore.
2954                  */
2955                 del_timer_sync(&sdata->u.mgd.timer);
2956                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2957
2958                 eth_zero_addr(sdata->u.mgd.bssid);
2959                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2960                 sdata->u.mgd.flags = 0;
2961                 sdata->vif.mu_mimo_owner = false;
2962
2963                 mutex_lock(&sdata->local->mtx);
2964                 ieee80211_vif_release_channel(sdata);
2965                 mutex_unlock(&sdata->local->mtx);
2966
2967                 if (abandon)
2968                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2969         }
2970
2971         kfree(assoc_data);
2972         sdata->u.mgd.assoc_data = NULL;
2973 }
2974
2975 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2976                                      struct ieee80211_mgmt *mgmt, size_t len)
2977 {
2978         struct ieee80211_local *local = sdata->local;
2979         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2980         const struct element *challenge;
2981         u8 *pos;
2982         u32 tx_flags = 0;
2983         struct ieee80211_prep_tx_info info = {
2984                 .subtype = IEEE80211_STYPE_AUTH,
2985         };
2986
2987         pos = mgmt->u.auth.variable;
2988         challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
2989                                        len - (pos - (u8 *)mgmt));
2990         if (!challenge)
2991                 return;
2992         auth_data->expected_transaction = 4;
2993         drv_mgd_prepare_tx(sdata->local, sdata, &info);
2994         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2995                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2996                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2997         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2998                             (void *)challenge,
2999                             challenge->datalen + sizeof(*challenge),
3000                             auth_data->bss->bssid, auth_data->bss->bssid,
3001                             auth_data->key, auth_data->key_len,
3002                             auth_data->key_idx, tx_flags);
3003 }
3004
3005 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
3006                                     const u8 *bssid)
3007 {
3008         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3009         struct sta_info *sta;
3010         bool result = true;
3011
3012         sdata_info(sdata, "authenticated\n");
3013         ifmgd->auth_data->done = true;
3014         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
3015         ifmgd->auth_data->timeout_started = true;
3016         run_again(sdata, ifmgd->auth_data->timeout);
3017
3018         /* move station state to auth */
3019         mutex_lock(&sdata->local->sta_mtx);
3020         sta = sta_info_get(sdata, bssid);
3021         if (!sta) {
3022                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
3023                 result = false;
3024                 goto out;
3025         }
3026         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
3027                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
3028                 result = false;
3029                 goto out;
3030         }
3031
3032 out:
3033         mutex_unlock(&sdata->local->sta_mtx);
3034         return result;
3035 }
3036
3037 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3038                                    struct ieee80211_mgmt *mgmt, size_t len)
3039 {
3040         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3041         u8 bssid[ETH_ALEN];
3042         u16 auth_alg, auth_transaction, status_code;
3043         struct ieee80211_event event = {
3044                 .type = MLME_EVENT,
3045                 .u.mlme.data = AUTH_EVENT,
3046         };
3047         struct ieee80211_prep_tx_info info = {
3048                 .subtype = IEEE80211_STYPE_AUTH,
3049         };
3050
3051         sdata_assert_lock(sdata);
3052
3053         if (len < 24 + 6)
3054                 return;
3055
3056         if (!ifmgd->auth_data || ifmgd->auth_data->done)
3057                 return;
3058
3059         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3060
3061         if (!ether_addr_equal(bssid, mgmt->bssid))
3062                 return;
3063
3064         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3065         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3066         status_code = le16_to_cpu(mgmt->u.auth.status_code);
3067
3068         if (auth_alg != ifmgd->auth_data->algorithm ||
3069             (auth_alg != WLAN_AUTH_SAE &&
3070              auth_transaction != ifmgd->auth_data->expected_transaction) ||
3071             (auth_alg == WLAN_AUTH_SAE &&
3072              (auth_transaction < ifmgd->auth_data->expected_transaction ||
3073               auth_transaction > 2))) {
3074                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3075                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3076                            auth_transaction,
3077                            ifmgd->auth_data->expected_transaction);
3078                 goto notify_driver;
3079         }
3080
3081         if (status_code != WLAN_STATUS_SUCCESS) {
3082                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3083
3084                 if (auth_alg == WLAN_AUTH_SAE &&
3085                     (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3086                      (auth_transaction == 1 &&
3087                       (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3088                        status_code == WLAN_STATUS_SAE_PK)))) {
3089                         /* waiting for userspace now */
3090                         ifmgd->auth_data->waiting = true;
3091                         ifmgd->auth_data->timeout =
3092                                 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
3093                         ifmgd->auth_data->timeout_started = true;
3094                         run_again(sdata, ifmgd->auth_data->timeout);
3095                         goto notify_driver;
3096                 }
3097
3098                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
3099                            mgmt->sa, status_code);
3100                 ieee80211_destroy_auth_data(sdata, false);
3101                 event.u.mlme.status = MLME_DENIED;
3102                 event.u.mlme.reason = status_code;
3103                 drv_event_callback(sdata->local, sdata, &event);
3104                 goto notify_driver;
3105         }
3106
3107         switch (ifmgd->auth_data->algorithm) {
3108         case WLAN_AUTH_OPEN:
3109         case WLAN_AUTH_LEAP:
3110         case WLAN_AUTH_FT:
3111         case WLAN_AUTH_SAE:
3112         case WLAN_AUTH_FILS_SK:
3113         case WLAN_AUTH_FILS_SK_PFS:
3114         case WLAN_AUTH_FILS_PK:
3115                 break;
3116         case WLAN_AUTH_SHARED_KEY:
3117                 if (ifmgd->auth_data->expected_transaction != 4) {
3118                         ieee80211_auth_challenge(sdata, mgmt, len);
3119                         /* need another frame */
3120                         return;
3121                 }
3122                 break;
3123         default:
3124                 WARN_ONCE(1, "invalid auth alg %d",
3125                           ifmgd->auth_data->algorithm);
3126                 goto notify_driver;
3127         }
3128
3129         event.u.mlme.status = MLME_SUCCESS;
3130         info.success = 1;
3131         drv_event_callback(sdata->local, sdata, &event);
3132         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3133             (auth_transaction == 2 &&
3134              ifmgd->auth_data->expected_transaction == 2)) {
3135                 if (!ieee80211_mark_sta_auth(sdata, bssid))
3136                         return; /* ignore frame -- wait for timeout */
3137         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3138                    auth_transaction == 2) {
3139                 sdata_info(sdata, "SAE peer confirmed\n");
3140                 ifmgd->auth_data->peer_confirmed = true;
3141         }
3142
3143         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3144 notify_driver:
3145         drv_mgd_complete_tx(sdata->local, sdata, &info);
3146 }
3147
3148 #define case_WLAN(type) \
3149         case WLAN_REASON_##type: return #type
3150
3151 const char *ieee80211_get_reason_code_string(u16 reason_code)
3152 {
3153         switch (reason_code) {
3154         case_WLAN(UNSPECIFIED);
3155         case_WLAN(PREV_AUTH_NOT_VALID);
3156         case_WLAN(DEAUTH_LEAVING);
3157         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3158         case_WLAN(DISASSOC_AP_BUSY);
3159         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3160         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3161         case_WLAN(DISASSOC_STA_HAS_LEFT);
3162         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3163         case_WLAN(DISASSOC_BAD_POWER);
3164         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3165         case_WLAN(INVALID_IE);
3166         case_WLAN(MIC_FAILURE);
3167         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3168         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3169         case_WLAN(IE_DIFFERENT);
3170         case_WLAN(INVALID_GROUP_CIPHER);
3171         case_WLAN(INVALID_PAIRWISE_CIPHER);
3172         case_WLAN(INVALID_AKMP);
3173         case_WLAN(UNSUPP_RSN_VERSION);
3174         case_WLAN(INVALID_RSN_IE_CAP);
3175         case_WLAN(IEEE8021X_FAILED);
3176         case_WLAN(CIPHER_SUITE_REJECTED);
3177         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3178         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3179         case_WLAN(DISASSOC_LOW_ACK);
3180         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3181         case_WLAN(QSTA_LEAVE_QBSS);
3182         case_WLAN(QSTA_NOT_USE);
3183         case_WLAN(QSTA_REQUIRE_SETUP);
3184         case_WLAN(QSTA_TIMEOUT);
3185         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3186         case_WLAN(MESH_PEER_CANCELED);
3187         case_WLAN(MESH_MAX_PEERS);
3188         case_WLAN(MESH_CONFIG);
3189         case_WLAN(MESH_CLOSE);
3190         case_WLAN(MESH_MAX_RETRIES);
3191         case_WLAN(MESH_CONFIRM_TIMEOUT);
3192         case_WLAN(MESH_INVALID_GTK);
3193         case_WLAN(MESH_INCONSISTENT_PARAM);
3194         case_WLAN(MESH_INVALID_SECURITY);
3195         case_WLAN(MESH_PATH_ERROR);
3196         case_WLAN(MESH_PATH_NOFORWARD);
3197         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3198         case_WLAN(MAC_EXISTS_IN_MBSS);
3199         case_WLAN(MESH_CHAN_REGULATORY);
3200         case_WLAN(MESH_CHAN);
3201         default: return "<unknown>";
3202         }
3203 }
3204
3205 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3206                                      struct ieee80211_mgmt *mgmt, size_t len)
3207 {
3208         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3209         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3210
3211         sdata_assert_lock(sdata);
3212
3213         if (len < 24 + 2)
3214                 return;
3215
3216         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3217                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3218                 return;
3219         }
3220
3221         if (ifmgd->associated &&
3222             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3223                 const u8 *bssid = ifmgd->associated->bssid;
3224
3225                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3226                            bssid, reason_code,
3227                            ieee80211_get_reason_code_string(reason_code));
3228
3229                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3230
3231                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3232                                             reason_code, false);
3233                 return;
3234         }
3235
3236         if (ifmgd->assoc_data &&
3237             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3238                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3239
3240                 sdata_info(sdata,
3241                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3242                            bssid, reason_code,
3243                            ieee80211_get_reason_code_string(reason_code));
3244
3245                 ieee80211_destroy_assoc_data(sdata, false, true);
3246
3247                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3248                 return;
3249         }
3250 }
3251
3252
3253 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3254                                        struct ieee80211_mgmt *mgmt, size_t len)
3255 {
3256         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3257         u16 reason_code;
3258
3259         sdata_assert_lock(sdata);
3260
3261         if (len < 24 + 2)
3262                 return;
3263
3264         if (!ifmgd->associated ||
3265             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3266                 return;
3267
3268         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3269
3270         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3271                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3272                 return;
3273         }
3274
3275         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3276                    mgmt->sa, reason_code,
3277                    ieee80211_get_reason_code_string(reason_code));
3278
3279         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3280
3281         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3282                                     false);
3283 }
3284
3285 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3286                                 u8 *supp_rates, unsigned int supp_rates_len,
3287                                 u32 *rates, u32 *basic_rates,
3288                                 bool *have_higher_than_11mbit,
3289                                 int *min_rate, int *min_rate_index,
3290                                 int shift)
3291 {
3292         int i, j;
3293
3294         for (i = 0; i < supp_rates_len; i++) {
3295                 int rate = supp_rates[i] & 0x7f;
3296                 bool is_basic = !!(supp_rates[i] & 0x80);
3297
3298                 if ((rate * 5 * (1 << shift)) > 110)
3299                         *have_higher_than_11mbit = true;
3300
3301                 /*
3302                  * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
3303                  * since they're not rates.
3304                  *
3305                  * Note: Even though the membership selector and the basic
3306                  *       rate flag share the same bit, they are not exactly
3307                  *       the same.
3308                  */
3309                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3310                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3311                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3312                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3313                         continue;
3314
3315                 for (j = 0; j < sband->n_bitrates; j++) {
3316                         struct ieee80211_rate *br;
3317                         int brate;
3318
3319                         br = &sband->bitrates[j];
3320
3321                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3322                         if (brate == rate) {
3323                                 *rates |= BIT(j);
3324                                 if (is_basic)
3325                                         *basic_rates |= BIT(j);
3326                                 if ((rate * 5) < *min_rate) {
3327                                         *min_rate = rate * 5;
3328                                         *min_rate_index = j;
3329                                 }
3330                                 break;
3331                         }
3332                 }
3333         }
3334 }
3335
3336 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3337                                         const struct ieee802_11_elems *elems)
3338 {
3339         if (elems->ext_capab_len < 10)
3340                 return false;
3341
3342         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3343                 return false;
3344
3345         return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3346                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3347 }
3348
3349 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3350                                     struct sta_info *sta,
3351                                     struct ieee802_11_elems *elems)
3352 {
3353         bool twt = ieee80211_twt_req_supported(sta, elems);
3354
3355         if (sdata->vif.bss_conf.twt_requester != twt) {
3356                 sdata->vif.bss_conf.twt_requester = twt;
3357                 return BSS_CHANGED_TWT;
3358         }
3359         return 0;
3360 }
3361
3362 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
3363                                         struct ieee80211_bss_conf *bss_conf,
3364                                         struct ieee80211_supported_band *sband,
3365                                         struct sta_info *sta)
3366 {
3367         const struct ieee80211_sta_he_cap *own_he_cap =
3368                 ieee80211_get_he_iftype_cap(sband,
3369                                             ieee80211_vif_type_p2p(&sdata->vif));
3370
3371         return bss_conf->he_support &&
3372                 (sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3373                         IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
3374                 own_he_cap &&
3375                 (own_he_cap->he_cap_elem.mac_cap_info[2] &
3376                         IEEE80211_HE_MAC_CAP2_BCAST_TWT);
3377 }
3378
3379 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3380                                     struct cfg80211_bss *cbss,
3381                                     struct ieee80211_mgmt *mgmt, size_t len,
3382                                     struct ieee802_11_elems *elems)
3383 {
3384         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3385         struct ieee80211_local *local = sdata->local;
3386         struct ieee80211_supported_band *sband;
3387         struct sta_info *sta;
3388         u16 capab_info, aid;
3389         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3390         const struct cfg80211_bss_ies *bss_ies = NULL;
3391         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3392         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3393         bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
3394         u32 changed = 0;
3395         u8 *pos;
3396         int err;
3397         bool ret;
3398
3399         /* AssocResp and ReassocResp have identical structure */
3400
3401         pos = mgmt->u.assoc_resp.variable;
3402         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3403         if (is_s1g) {
3404                 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
3405                 aid = 0; /* TODO */
3406         }
3407         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3408         elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false,
3409                                        mgmt->bssid, assoc_data->bss->bssid);
3410
3411         if (!elems)
3412                 return false;
3413
3414         if (elems->aid_resp)
3415                 aid = le16_to_cpu(elems->aid_resp->aid);
3416
3417         /*
3418          * The 5 MSB of the AID field are reserved
3419          * (802.11-2016 9.4.1.8 AID field)
3420          */
3421         aid &= 0x7ff;
3422
3423         ifmgd->broken_ap = false;
3424
3425         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3426                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3427                            aid);
3428                 aid = 0;
3429                 ifmgd->broken_ap = true;
3430         }
3431
3432         if (!is_s1g && !elems->supp_rates) {
3433                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3434                 ret = false;
3435                 goto out;
3436         }
3437
3438         sdata->vif.bss_conf.aid = aid;
3439         ifmgd->tdls_chan_switch_prohibited =
3440                 elems->ext_capab && elems->ext_capab_len >= 5 &&
3441                 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3442
3443         /*
3444          * Some APs are erroneously not including some information in their
3445          * (re)association response frames. Try to recover by using the data
3446          * from the beacon or probe response. This seems to afflict mobile
3447          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3448          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3449          */
3450         if (!is_6ghz &&
3451             ((assoc_data->wmm && !elems->wmm_param) ||
3452              (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3453               (!elems->ht_cap_elem || !elems->ht_operation)) ||
3454              (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3455               (!elems->vht_cap_elem || !elems->vht_operation)))) {
3456                 const struct cfg80211_bss_ies *ies;
3457                 struct ieee802_11_elems *bss_elems;
3458
3459                 rcu_read_lock();
3460                 ies = rcu_dereference(cbss->ies);
3461                 if (ies)
3462                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3463                                           GFP_ATOMIC);
3464                 rcu_read_unlock();
3465                 if (!bss_ies) {
3466                         ret = false;
3467                         goto out;
3468                 }
3469
3470                 bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3471                                                    false, mgmt->bssid,
3472                                                    assoc_data->bss->bssid);
3473                 if (!bss_elems) {
3474                         ret = false;
3475                         goto out;
3476                 }
3477
3478                 if (assoc_data->wmm &&
3479                     !elems->wmm_param && bss_elems->wmm_param) {
3480                         elems->wmm_param = bss_elems->wmm_param;
3481                         sdata_info(sdata,
3482                                    "AP bug: WMM param missing from AssocResp\n");
3483                 }
3484
3485                 /*
3486                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3487                  * have to include the IEs in the (re)association response.
3488                  */
3489                 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
3490                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3491                         elems->ht_cap_elem = bss_elems->ht_cap_elem;
3492                         sdata_info(sdata,
3493                                    "AP bug: HT capability missing from AssocResp\n");
3494                 }
3495                 if (!elems->ht_operation && bss_elems->ht_operation &&
3496                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3497                         elems->ht_operation = bss_elems->ht_operation;
3498                         sdata_info(sdata,
3499                                    "AP bug: HT operation missing from AssocResp\n");
3500                 }
3501                 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
3502                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3503                         elems->vht_cap_elem = bss_elems->vht_cap_elem;
3504                         sdata_info(sdata,
3505                                    "AP bug: VHT capa missing from AssocResp\n");
3506                 }
3507                 if (!elems->vht_operation && bss_elems->vht_operation &&
3508                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3509                         elems->vht_operation = bss_elems->vht_operation;
3510                         sdata_info(sdata,
3511                                    "AP bug: VHT operation missing from AssocResp\n");
3512                 }
3513
3514                 kfree(bss_elems);
3515         }
3516
3517         /*
3518          * We previously checked these in the beacon/probe response, so
3519          * they should be present here. This is just a safety net.
3520          */
3521         if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3522             (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3523                 sdata_info(sdata,
3524                            "HT AP is missing WMM params or HT capability/operation\n");
3525                 ret = false;
3526                 goto out;
3527         }
3528
3529         if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3530             (!elems->vht_cap_elem || !elems->vht_operation)) {
3531                 sdata_info(sdata,
3532                            "VHT AP is missing VHT capability/operation\n");
3533                 ret = false;
3534                 goto out;
3535         }
3536
3537         if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3538             !elems->he_6ghz_capa) {
3539                 sdata_info(sdata,
3540                            "HE 6 GHz AP is missing HE 6 GHz band capability\n");
3541                 ret = false;
3542                 goto out;
3543         }
3544
3545         mutex_lock(&sdata->local->sta_mtx);
3546         /*
3547          * station info was already allocated and inserted before
3548          * the association and should be available to us
3549          */
3550         sta = sta_info_get(sdata, cbss->bssid);
3551         if (WARN_ON(!sta)) {
3552                 mutex_unlock(&sdata->local->sta_mtx);
3553                 ret = false;
3554                 goto out;
3555         }
3556
3557         sband = ieee80211_get_sband(sdata);
3558         if (!sband) {
3559                 mutex_unlock(&sdata->local->sta_mtx);
3560                 ret = false;
3561                 goto out;
3562         }
3563
3564         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3565             (!elems->he_cap || !elems->he_operation)) {
3566                 mutex_unlock(&sdata->local->sta_mtx);
3567                 sdata_info(sdata,
3568                            "HE AP is missing HE capability/operation\n");
3569                 ret = false;
3570                 goto out;
3571         }
3572
3573         /* Set up internal HT/VHT capabilities */
3574         if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3575                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3576                                                   elems->ht_cap_elem, sta);
3577
3578         if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3579                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3580                                                     elems->vht_cap_elem, sta);
3581
3582         if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3583             elems->he_cap) {
3584                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3585                                                   elems->he_cap,
3586                                                   elems->he_cap_len,
3587                                                   elems->he_6ghz_capa,
3588                                                   sta);
3589
3590                 bss_conf->he_support = sta->sta.he_cap.has_he;
3591                 if (elems->rsnx && elems->rsnx_len &&
3592                     (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
3593                     wiphy_ext_feature_isset(local->hw.wiphy,
3594                                             NL80211_EXT_FEATURE_PROTECTED_TWT))
3595                         bss_conf->twt_protected = true;
3596                 else
3597                         bss_conf->twt_protected = false;
3598
3599                 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3600
3601                 if (elems->eht_operation && elems->eht_cap &&
3602                     !(ifmgd->flags & IEEE80211_STA_DISABLE_EHT)) {
3603                         ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
3604                                                             elems->he_cap,
3605                                                             elems->he_cap_len,
3606                                                             elems->eht_cap,
3607                                                             elems->eht_cap_len,
3608                                                             sta);
3609
3610                         bss_conf->eht_support = sta->sta.eht_cap.has_eht;
3611                 } else {
3612                         bss_conf->eht_support = false;
3613                 }
3614         } else {
3615                 bss_conf->he_support = false;
3616                 bss_conf->twt_requester = false;
3617                 bss_conf->twt_protected = false;
3618                 bss_conf->eht_support = false;
3619         }
3620
3621         bss_conf->twt_broadcast =
3622                 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta);
3623
3624         if (bss_conf->he_support) {
3625                 bss_conf->he_bss_color.color =
3626                         le32_get_bits(elems->he_operation->he_oper_params,
3627                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3628                 bss_conf->he_bss_color.partial =
3629                         le32_get_bits(elems->he_operation->he_oper_params,
3630                                       IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3631                 bss_conf->he_bss_color.enabled =
3632                         !le32_get_bits(elems->he_operation->he_oper_params,
3633                                        IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3634
3635                 if (bss_conf->he_bss_color.enabled)
3636                         changed |= BSS_CHANGED_HE_BSS_COLOR;
3637
3638                 bss_conf->htc_trig_based_pkt_ext =
3639                         le32_get_bits(elems->he_operation->he_oper_params,
3640                               IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3641                 bss_conf->frame_time_rts_th =
3642                         le32_get_bits(elems->he_operation->he_oper_params,
3643                               IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3644
3645                 bss_conf->uora_exists = !!elems->uora_element;
3646                 if (elems->uora_element)
3647                         bss_conf->uora_ocw_range = elems->uora_element[0];
3648
3649                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3650                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3651                 /* TODO: OPEN: what happens if BSS color disable is set? */
3652         }
3653
3654         if (cbss->transmitted_bss) {
3655                 bss_conf->nontransmitted = true;
3656                 ether_addr_copy(bss_conf->transmitter_bssid,
3657                                 cbss->transmitted_bss->bssid);
3658                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3659                 bss_conf->bssid_index = cbss->bssid_index;
3660         }
3661
3662         /*
3663          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3664          * in their association response, so ignore that data for our own
3665          * configuration. If it changed since the last beacon, we'll get the
3666          * next beacon and update then.
3667          */
3668
3669         /*
3670          * If an operating mode notification IE is present, override the
3671          * NSS calculation (that would be done in rate_control_rate_init())
3672          * and use the # of streams from that element.
3673          */
3674         if (elems->opmode_notif &&
3675             !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3676                 u8 nss;
3677
3678                 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3679                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3680                 nss += 1;
3681                 sta->sta.rx_nss = nss;
3682         }
3683
3684         rate_control_rate_init(sta);
3685
3686         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3687                 set_sta_flag(sta, WLAN_STA_MFP);
3688                 sta->sta.mfp = true;
3689         } else {
3690                 sta->sta.mfp = false;
3691         }
3692
3693         sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
3694                        local->hw.queues >= IEEE80211_NUM_ACS;
3695
3696         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3697         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3698                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3699         if (err) {
3700                 sdata_info(sdata,
3701                            "failed to move station %pM to desired state\n",
3702                            sta->sta.addr);
3703                 WARN_ON(__sta_info_destroy(sta));
3704                 mutex_unlock(&sdata->local->sta_mtx);
3705                 ret = false;
3706                 goto out;
3707         }
3708
3709         if (sdata->wdev.use_4addr)
3710                 drv_sta_set_4addr(local, sdata, &sta->sta, true);
3711
3712         mutex_unlock(&sdata->local->sta_mtx);
3713
3714         /*
3715          * Always handle WMM once after association regardless
3716          * of the first value the AP uses. Setting -1 here has
3717          * that effect because the AP values is an unsigned
3718          * 4-bit value.
3719          */
3720         ifmgd->wmm_last_param_set = -1;
3721         ifmgd->mu_edca_last_param_set = -1;
3722
3723         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3724                 ieee80211_set_wmm_default(sdata, false, false);
3725         } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3726                                              elems->wmm_param_len,
3727                                              elems->mu_edca_param_set)) {
3728                 /* still enable QoS since we might have HT/VHT */
3729                 ieee80211_set_wmm_default(sdata, false, true);
3730                 /* set the disable-WMM flag in this case to disable
3731                  * tracking WMM parameter changes in the beacon if
3732                  * the parameters weren't actually valid. Doing so
3733                  * avoids changing parameters very strangely when
3734                  * the AP is going back and forth between valid and
3735                  * invalid parameters.
3736                  */
3737                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3738         }
3739         changed |= BSS_CHANGED_QOS;
3740
3741         if (elems->max_idle_period_ie) {
3742                 bss_conf->max_idle_period =
3743                         le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3744                 bss_conf->protected_keep_alive =
3745                         !!(elems->max_idle_period_ie->idle_options &
3746                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3747                 changed |= BSS_CHANGED_KEEP_ALIVE;
3748         } else {
3749                 bss_conf->max_idle_period = 0;
3750                 bss_conf->protected_keep_alive = false;
3751         }
3752
3753         /* set assoc capability (AID was already set earlier),
3754          * ieee80211_set_associated() will tell the driver */
3755         bss_conf->assoc_capability = capab_info;
3756         ieee80211_set_associated(sdata, cbss, changed);
3757
3758         /*
3759          * If we're using 4-addr mode, let the AP know that we're
3760          * doing so, so that it can create the STA VLAN on its side
3761          */
3762         if (ifmgd->use_4addr)
3763                 ieee80211_send_4addr_nullfunc(local, sdata);
3764
3765         /*
3766          * Start timer to probe the connection to the AP now.
3767          * Also start the timer that will detect beacon loss.
3768          */
3769         ieee80211_sta_reset_beacon_monitor(sdata);
3770         ieee80211_sta_reset_conn_monitor(sdata);
3771
3772         ret = true;
3773  out:
3774         kfree(elems);
3775         kfree(bss_ies);
3776         return ret;
3777 }
3778
3779 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3780                                          struct ieee80211_mgmt *mgmt,
3781                                          size_t len)
3782 {
3783         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3784         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3785         u16 capab_info, status_code, aid;
3786         struct ieee802_11_elems *elems;
3787         int ac, uapsd_queues = -1;
3788         u8 *pos;
3789         bool reassoc;
3790         struct cfg80211_bss *cbss;
3791         struct ieee80211_event event = {
3792                 .type = MLME_EVENT,
3793                 .u.mlme.data = ASSOC_EVENT,
3794         };
3795         struct ieee80211_prep_tx_info info = {};
3796
3797         sdata_assert_lock(sdata);
3798
3799         if (!assoc_data)
3800                 return;
3801
3802         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3803                 return;
3804
3805         cbss = assoc_data->bss;
3806
3807         /*
3808          * AssocResp and ReassocResp have identical structure, so process both
3809          * of them in this function.
3810          */
3811
3812         if (len < 24 + 6)
3813                 return;
3814
3815         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3816         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3817         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3818         pos = mgmt->u.assoc_resp.variable;
3819         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3820         if (cbss->channel->band == NL80211_BAND_S1GHZ) {
3821                 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
3822                 aid = 0; /* TODO */
3823         }
3824
3825         /*
3826          * Note: this may not be perfect, AP might misbehave - if
3827          * anyone needs to rely on perfect complete notification
3828          * with the exact right subtype, then we need to track what
3829          * we actually transmitted.
3830          */
3831         info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
3832                                  IEEE80211_STYPE_ASSOC_REQ;
3833
3834         sdata_info(sdata,
3835                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3836                    reassoc ? "Rea" : "A", mgmt->sa,
3837                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3838
3839         if (assoc_data->fils_kek_len &&
3840             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3841                 return;
3842
3843         elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false,
3844                                        mgmt->bssid, assoc_data->bss->bssid);
3845         if (!elems)
3846                 goto notify_driver;
3847
3848         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3849             elems->timeout_int &&
3850             elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3851                 u32 tu, ms;
3852
3853                 cfg80211_assoc_comeback(sdata->dev, assoc_data->bss,
3854                                         le32_to_cpu(elems->timeout_int->value));
3855
3856                 tu = le32_to_cpu(elems->timeout_int->value);
3857                 ms = tu * 1024 / 1000;
3858                 sdata_info(sdata,
3859                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3860                            mgmt->sa, tu, ms);
3861                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3862                 assoc_data->timeout_started = true;
3863                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3864                         run_again(sdata, assoc_data->timeout);
3865                 goto notify_driver;
3866         }
3867
3868         if (status_code != WLAN_STATUS_SUCCESS) {
3869                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3870                            mgmt->sa, status_code);
3871                 ieee80211_destroy_assoc_data(sdata, false, false);
3872                 event.u.mlme.status = MLME_DENIED;
3873                 event.u.mlme.reason = status_code;
3874                 drv_event_callback(sdata->local, sdata, &event);
3875         } else {
3876                 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) {
3877                         /* oops -- internal error -- send timeout for now */
3878                         ieee80211_destroy_assoc_data(sdata, false, false);
3879                         cfg80211_assoc_timeout(sdata->dev, cbss);
3880                         goto notify_driver;
3881                 }
3882                 event.u.mlme.status = MLME_SUCCESS;
3883                 drv_event_callback(sdata->local, sdata, &event);
3884                 sdata_info(sdata, "associated\n");
3885
3886                 /*
3887                  * destroy assoc_data afterwards, as otherwise an idle
3888                  * recalc after assoc_data is NULL but before associated
3889                  * is set can cause the interface to go idle
3890                  */
3891                 ieee80211_destroy_assoc_data(sdata, true, false);
3892
3893                 /* get uapsd queues configuration */
3894                 uapsd_queues = 0;
3895                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3896                         if (sdata->tx_conf[ac].uapsd)
3897                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3898
3899                 info.success = 1;
3900         }
3901
3902         cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues,
3903                                ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3904 notify_driver:
3905         drv_mgd_complete_tx(sdata->local, sdata, &info);
3906         kfree(elems);
3907 }
3908
3909 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3910                                   struct ieee80211_mgmt *mgmt, size_t len,
3911                                   struct ieee80211_rx_status *rx_status)
3912 {
3913         struct ieee80211_local *local = sdata->local;
3914         struct ieee80211_bss *bss;
3915         struct ieee80211_channel *channel;
3916
3917         sdata_assert_lock(sdata);
3918
3919         channel = ieee80211_get_channel_khz(local->hw.wiphy,
3920                                         ieee80211_rx_status_to_khz(rx_status));
3921         if (!channel)
3922                 return;
3923
3924         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3925         if (bss) {
3926                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3927                 ieee80211_rx_bss_put(local, bss);
3928         }
3929 }
3930
3931
3932 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3933                                          struct sk_buff *skb)
3934 {
3935         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3936         struct ieee80211_if_managed *ifmgd;
3937         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3938         struct ieee80211_channel *channel;
3939         size_t baselen, len = skb->len;
3940
3941         ifmgd = &sdata->u.mgd;
3942
3943         sdata_assert_lock(sdata);
3944
3945         /*
3946          * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
3947          * "If a 6 GHz AP receives a Probe Request frame  and responds with
3948          * a Probe Response frame [..], the Address 1 field of the Probe
3949          * Response frame shall be set to the broadcast address [..]"
3950          * So, on 6GHz band we should also accept broadcast responses.
3951          */
3952         channel = ieee80211_get_channel(sdata->local->hw.wiphy,
3953                                         rx_status->freq);
3954         if (!channel)
3955                 return;
3956
3957         if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
3958             (channel->band != NL80211_BAND_6GHZ ||
3959              !is_broadcast_ether_addr(mgmt->da)))
3960                 return; /* ignore ProbeResp to foreign address */
3961
3962         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3963         if (baselen > len)
3964                 return;
3965
3966         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3967
3968         if (ifmgd->associated &&
3969             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3970                 ieee80211_reset_ap_probe(sdata);
3971 }
3972
3973 /*
3974  * This is the canonical list of information elements we care about,
3975  * the filter code also gives us all changes to the Microsoft OUI
3976  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3977  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3978  * changes to requested client power.
3979  *
3980  * We implement beacon filtering in software since that means we can
3981  * avoid processing the frame here and in cfg80211, and userspace
3982  * will not be able to tell whether the hardware supports it or not.
3983  *
3984  * XXX: This list needs to be dynamic -- userspace needs to be able to
3985  *      add items it requires. It also needs to be able to tell us to
3986  *      look out for other vendor IEs.
3987  */
3988 static const u64 care_about_ies =
3989         (1ULL << WLAN_EID_COUNTRY) |
3990         (1ULL << WLAN_EID_ERP_INFO) |
3991         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3992         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3993         (1ULL << WLAN_EID_HT_CAPABILITY) |
3994         (1ULL << WLAN_EID_HT_OPERATION) |
3995         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3996
3997 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3998                                         struct ieee80211_if_managed *ifmgd,
3999                                         struct ieee80211_bss_conf *bss_conf,
4000                                         struct ieee80211_local *local,
4001                                         struct ieee80211_rx_status *rx_status)
4002 {
4003         /* Track average RSSI from the Beacon frames of the current AP */
4004
4005         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
4006                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
4007                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
4008                 ifmgd->last_cqm_event_signal = 0;
4009                 ifmgd->count_beacon_signal = 1;
4010                 ifmgd->last_ave_beacon_signal = 0;
4011         } else {
4012                 ifmgd->count_beacon_signal++;
4013         }
4014
4015         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
4016
4017         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
4018             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
4019                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
4020                 int last_sig = ifmgd->last_ave_beacon_signal;
4021                 struct ieee80211_event event = {
4022                         .type = RSSI_EVENT,
4023                 };
4024
4025                 /*
4026                  * if signal crosses either of the boundaries, invoke callback
4027                  * with appropriate parameters
4028                  */
4029                 if (sig > ifmgd->rssi_max_thold &&
4030                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
4031                         ifmgd->last_ave_beacon_signal = sig;
4032                         event.u.rssi.data = RSSI_EVENT_HIGH;
4033                         drv_event_callback(local, sdata, &event);
4034                 } else if (sig < ifmgd->rssi_min_thold &&
4035                            (last_sig >= ifmgd->rssi_max_thold ||
4036                            last_sig == 0)) {
4037                         ifmgd->last_ave_beacon_signal = sig;
4038                         event.u.rssi.data = RSSI_EVENT_LOW;
4039                         drv_event_callback(local, sdata, &event);
4040                 }
4041         }
4042
4043         if (bss_conf->cqm_rssi_thold &&
4044             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
4045             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
4046                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
4047                 int last_event = ifmgd->last_cqm_event_signal;
4048                 int thold = bss_conf->cqm_rssi_thold;
4049                 int hyst = bss_conf->cqm_rssi_hyst;
4050
4051                 if (sig < thold &&
4052                     (last_event == 0 || sig < last_event - hyst)) {
4053                         ifmgd->last_cqm_event_signal = sig;
4054                         ieee80211_cqm_rssi_notify(
4055                                 &sdata->vif,
4056                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
4057                                 sig, GFP_KERNEL);
4058                 } else if (sig > thold &&
4059                            (last_event == 0 || sig > last_event + hyst)) {
4060                         ifmgd->last_cqm_event_signal = sig;
4061                         ieee80211_cqm_rssi_notify(
4062                                 &sdata->vif,
4063                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
4064                                 sig, GFP_KERNEL);
4065                 }
4066         }
4067
4068         if (bss_conf->cqm_rssi_low &&
4069             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
4070                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
4071                 int last_event = ifmgd->last_cqm_event_signal;
4072                 int low = bss_conf->cqm_rssi_low;
4073                 int high = bss_conf->cqm_rssi_high;
4074
4075                 if (sig < low &&
4076                     (last_event == 0 || last_event >= low)) {
4077                         ifmgd->last_cqm_event_signal = sig;
4078                         ieee80211_cqm_rssi_notify(
4079                                 &sdata->vif,
4080                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
4081                                 sig, GFP_KERNEL);
4082                 } else if (sig > high &&
4083                            (last_event == 0 || last_event <= high)) {
4084                         ifmgd->last_cqm_event_signal = sig;
4085                         ieee80211_cqm_rssi_notify(
4086                                 &sdata->vif,
4087                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
4088                                 sig, GFP_KERNEL);
4089                 }
4090         }
4091 }
4092
4093 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
4094                                     struct cfg80211_bss *bss)
4095 {
4096         if (ether_addr_equal(tx_bssid, bss->bssid))
4097                 return true;
4098         if (!bss->transmitted_bss)
4099                 return false;
4100         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
4101 }
4102
4103 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
4104                                      struct ieee80211_hdr *hdr, size_t len,
4105                                      struct ieee80211_rx_status *rx_status)
4106 {
4107         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4108         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
4109         struct ieee80211_mgmt *mgmt = (void *) hdr;
4110         size_t baselen;
4111         struct ieee802_11_elems *elems;
4112         struct ieee80211_local *local = sdata->local;
4113         struct ieee80211_chanctx_conf *chanctx_conf;
4114         struct ieee80211_channel *chan;
4115         struct sta_info *sta;
4116         u32 changed = 0;
4117         bool erp_valid;
4118         u8 erp_value = 0;
4119         u32 ncrc = 0;
4120         u8 *bssid, *variable = mgmt->u.beacon.variable;
4121         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
4122
4123         sdata_assert_lock(sdata);
4124
4125         /* Process beacon from the current BSS */
4126         bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
4127         if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
4128                 struct ieee80211_ext *ext = (void *) mgmt;
4129
4130                 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
4131                         variable = ext->u.s1g_short_beacon.variable;
4132                 else
4133                         variable = ext->u.s1g_beacon.variable;
4134         }
4135
4136         baselen = (u8 *) variable - (u8 *) mgmt;
4137         if (baselen > len)
4138                 return;
4139
4140         rcu_read_lock();
4141         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4142         if (!chanctx_conf) {
4143                 rcu_read_unlock();
4144                 return;
4145         }
4146
4147         if (ieee80211_rx_status_to_khz(rx_status) !=
4148             ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
4149                 rcu_read_unlock();
4150                 return;
4151         }
4152         chan = chanctx_conf->def.chan;
4153         rcu_read_unlock();
4154
4155         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
4156             ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) {
4157                 elems = ieee802_11_parse_elems(variable, len - baselen, false,
4158                                                bssid,
4159                                                ifmgd->assoc_data->bss->bssid);
4160                 if (!elems)
4161                         return;
4162
4163                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4164
4165                 if (elems->dtim_period)
4166                         ifmgd->dtim_period = elems->dtim_period;
4167                 ifmgd->have_beacon = true;
4168                 ifmgd->assoc_data->need_beacon = false;
4169                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4170                         sdata->vif.bss_conf.sync_tsf =
4171                                 le64_to_cpu(mgmt->u.beacon.timestamp);
4172                         sdata->vif.bss_conf.sync_device_ts =
4173                                 rx_status->device_timestamp;
4174                         sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count;
4175                 }
4176
4177                 if (elems->mbssid_config_ie)
4178                         bss_conf->profile_periodicity =
4179                                 elems->mbssid_config_ie->profile_periodicity;
4180                 else
4181                         bss_conf->profile_periodicity = 0;
4182
4183                 if (elems->ext_capab_len >= 11 &&
4184                     (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
4185                         bss_conf->ema_ap = true;
4186                 else
4187                         bss_conf->ema_ap = false;
4188
4189                 /* continue assoc process */
4190                 ifmgd->assoc_data->timeout = jiffies;
4191                 ifmgd->assoc_data->timeout_started = true;
4192                 run_again(sdata, ifmgd->assoc_data->timeout);
4193                 kfree(elems);
4194                 return;
4195         }
4196
4197         if (!ifmgd->associated ||
4198             !ieee80211_rx_our_beacon(bssid,  ifmgd->associated))
4199                 return;
4200         bssid = ifmgd->associated->bssid;
4201
4202         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
4203                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
4204                                             local, rx_status);
4205
4206         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
4207                 mlme_dbg_ratelimited(sdata,
4208                                      "cancelling AP probe due to a received beacon\n");
4209                 ieee80211_reset_ap_probe(sdata);
4210         }
4211
4212         /*
4213          * Push the beacon loss detection into the future since
4214          * we are processing a beacon from the AP just now.
4215          */
4216         ieee80211_sta_reset_beacon_monitor(sdata);
4217
4218         /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
4219          * element (which carries the beacon interval). Don't forget to add a
4220          * bit to care_about_ies[] above if mac80211 is interested in a
4221          * changing S1G element.
4222          */
4223         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
4224                 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
4225         elems = ieee802_11_parse_elems_crc(variable, len - baselen,
4226                                            false, care_about_ies, ncrc,
4227                                            mgmt->bssid, bssid);
4228         if (!elems)
4229                 return;
4230         ncrc = elems->crc;
4231
4232         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
4233             ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) {
4234                 if (local->hw.conf.dynamic_ps_timeout > 0) {
4235                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
4236                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
4237                                 ieee80211_hw_config(local,
4238                                                     IEEE80211_CONF_CHANGE_PS);
4239                         }
4240                         ieee80211_send_nullfunc(local, sdata, false);
4241                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
4242                         local->pspolling = true;
4243
4244                         /*
4245                          * Here is assumed that the driver will be
4246                          * able to send ps-poll frame and receive a
4247                          * response even though power save mode is
4248                          * enabled, but some drivers might require
4249                          * to disable power save here. This needs
4250                          * to be investigated.
4251                          */
4252                         ieee80211_send_pspoll(local, sdata);
4253                 }
4254         }
4255
4256         if (sdata->vif.p2p ||
4257             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
4258                 struct ieee80211_p2p_noa_attr noa = {};
4259                 int ret;
4260
4261                 ret = cfg80211_get_p2p_attr(variable,
4262                                             len - baselen,
4263                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
4264                                             (u8 *) &noa, sizeof(noa));
4265                 if (ret >= 2) {
4266                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
4267                                 /* valid noa_attr and index changed */
4268                                 sdata->u.mgd.p2p_noa_index = noa.index;
4269                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
4270                                 changed |= BSS_CHANGED_P2P_PS;
4271                                 /*
4272                                  * make sure we update all information, the CRC
4273                                  * mechanism doesn't look at P2P attributes.
4274                                  */
4275                                 ifmgd->beacon_crc_valid = false;
4276                         }
4277                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
4278                         /* noa_attr not found and we had valid noa_attr before */
4279                         sdata->u.mgd.p2p_noa_index = -1;
4280                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
4281                         changed |= BSS_CHANGED_P2P_PS;
4282                         ifmgd->beacon_crc_valid = false;
4283                 }
4284         }
4285
4286         if (ifmgd->csa_waiting_bcn)
4287                 ieee80211_chswitch_post_beacon(sdata);
4288
4289         /*
4290          * Update beacon timing and dtim count on every beacon appearance. This
4291          * will allow the driver to use the most updated values. Do it before
4292          * comparing this one with last received beacon.
4293          * IMPORTANT: These parameters would possibly be out of sync by the time
4294          * the driver will use them. The synchronized view is currently
4295          * guaranteed only in certain callbacks.
4296          */
4297         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
4298             !ieee80211_is_s1g_beacon(hdr->frame_control)) {
4299                 sdata->vif.bss_conf.sync_tsf =
4300                         le64_to_cpu(mgmt->u.beacon.timestamp);
4301                 sdata->vif.bss_conf.sync_device_ts =
4302                         rx_status->device_timestamp;
4303                 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count;
4304         }
4305
4306         if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) ||
4307             ieee80211_is_s1g_short_beacon(mgmt->frame_control))
4308                 goto free;
4309         ifmgd->beacon_crc = ncrc;
4310         ifmgd->beacon_crc_valid = true;
4311
4312         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4313
4314         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4315                                          rx_status->device_timestamp,
4316                                          elems, true);
4317
4318         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
4319             ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
4320                                      elems->wmm_param_len,
4321                                      elems->mu_edca_param_set))
4322                 changed |= BSS_CHANGED_QOS;
4323
4324         /*
4325          * If we haven't had a beacon before, tell the driver about the
4326          * DTIM period (and beacon timing if desired) now.
4327          */
4328         if (!ifmgd->have_beacon) {
4329                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4330                 bss_conf->dtim_period = elems->dtim_period ?: 1;
4331
4332                 changed |= BSS_CHANGED_BEACON_INFO;
4333                 ifmgd->have_beacon = true;
4334
4335                 mutex_lock(&local->iflist_mtx);
4336                 ieee80211_recalc_ps(local);
4337                 mutex_unlock(&local->iflist_mtx);
4338
4339                 ieee80211_recalc_ps_vif(sdata);
4340         }
4341
4342         if (elems->erp_info) {
4343                 erp_valid = true;
4344                 erp_value = elems->erp_info[0];
4345         } else {
4346                 erp_valid = false;
4347         }
4348
4349         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
4350                 changed |= ieee80211_handle_bss_capability(sdata,
4351                                 le16_to_cpu(mgmt->u.beacon.capab_info),
4352                                 erp_valid, erp_value);
4353
4354         mutex_lock(&local->sta_mtx);
4355         sta = sta_info_get(sdata, bssid);
4356
4357         changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
4358
4359         if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem,
4360                                 elems->vht_cap_elem, elems->ht_operation,
4361                                 elems->vht_operation, elems->he_operation,
4362                                 elems->eht_operation,
4363                                 elems->s1g_oper, bssid, &changed)) {
4364                 mutex_unlock(&local->sta_mtx);
4365                 sdata_info(sdata,
4366                            "failed to follow AP %pM bandwidth change, disconnect\n",
4367                            bssid);
4368                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4369                                        WLAN_REASON_DEAUTH_LEAVING,
4370                                        true, deauth_buf);
4371                 ieee80211_report_disconnect(sdata, deauth_buf,
4372                                             sizeof(deauth_buf), true,
4373                                             WLAN_REASON_DEAUTH_LEAVING,
4374                                             false);
4375                 goto free;
4376         }
4377
4378         if (sta && elems->opmode_notif)
4379                 ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif,
4380                                             rx_status->band);
4381         mutex_unlock(&local->sta_mtx);
4382
4383         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4384                                                elems->country_elem,
4385                                                elems->country_elem_len,
4386                                                elems->pwr_constr_elem,
4387                                                elems->cisco_dtpc_elem);
4388
4389         ieee80211_bss_info_change_notify(sdata, changed);
4390 free:
4391         kfree(elems);
4392 }
4393
4394 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
4395                                  struct sk_buff *skb)
4396 {
4397         struct ieee80211_rx_status *rx_status;
4398         struct ieee80211_hdr *hdr;
4399         u16 fc;
4400
4401         rx_status = (struct ieee80211_rx_status *) skb->cb;
4402         hdr = (struct ieee80211_hdr *) skb->data;
4403         fc = le16_to_cpu(hdr->frame_control);
4404
4405         sdata_lock(sdata);
4406         switch (fc & IEEE80211_FCTL_STYPE) {
4407         case IEEE80211_STYPE_S1G_BEACON:
4408                 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status);
4409                 break;
4410         }
4411         sdata_unlock(sdata);
4412 }
4413
4414 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4415                                   struct sk_buff *skb)
4416 {
4417         struct ieee80211_rx_status *rx_status;
4418         struct ieee80211_mgmt *mgmt;
4419         u16 fc;
4420         int ies_len;
4421
4422         rx_status = (struct ieee80211_rx_status *) skb->cb;
4423         mgmt = (struct ieee80211_mgmt *) skb->data;
4424         fc = le16_to_cpu(mgmt->frame_control);
4425
4426         sdata_lock(sdata);
4427
4428         switch (fc & IEEE80211_FCTL_STYPE) {
4429         case IEEE80211_STYPE_BEACON:
4430                 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt,
4431                                          skb->len, rx_status);
4432                 break;
4433         case IEEE80211_STYPE_PROBE_RESP:
4434                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4435                 break;
4436         case IEEE80211_STYPE_AUTH:
4437                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4438                 break;
4439         case IEEE80211_STYPE_DEAUTH:
4440                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4441                 break;
4442         case IEEE80211_STYPE_DISASSOC:
4443                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4444                 break;
4445         case IEEE80211_STYPE_ASSOC_RESP:
4446         case IEEE80211_STYPE_REASSOC_RESP:
4447                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4448                 break;
4449         case IEEE80211_STYPE_ACTION:
4450                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4451                         struct ieee802_11_elems *elems;
4452
4453                         ies_len = skb->len -
4454                                   offsetof(struct ieee80211_mgmt,
4455                                            u.action.u.chan_switch.variable);
4456
4457                         if (ies_len < 0)
4458                                 break;
4459
4460                         /* CSA IE cannot be overridden, no need for BSSID */
4461                         elems = ieee802_11_parse_elems(
4462                                         mgmt->u.action.u.chan_switch.variable,
4463                                         ies_len, true, mgmt->bssid, NULL);
4464
4465                         if (elems && !elems->parse_error)
4466                                 ieee80211_sta_process_chanswitch(sdata,
4467                                                                  rx_status->mactime,
4468                                                                  rx_status->device_timestamp,
4469                                                                  elems, false);
4470                         kfree(elems);
4471                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4472                         struct ieee802_11_elems *elems;
4473
4474                         ies_len = skb->len -
4475                                   offsetof(struct ieee80211_mgmt,
4476                                            u.action.u.ext_chan_switch.variable);
4477
4478                         if (ies_len < 0)
4479                                 break;
4480
4481                         /*
4482                          * extended CSA IE can't be overridden, no need for
4483                          * BSSID
4484                          */
4485                         elems = ieee802_11_parse_elems(
4486                                         mgmt->u.action.u.ext_chan_switch.variable,
4487                                         ies_len, true, mgmt->bssid, NULL);
4488
4489                         if (elems && !elems->parse_error) {
4490                                 /* for the handling code pretend it was an IE */
4491                                 elems->ext_chansw_ie =
4492                                         &mgmt->u.action.u.ext_chan_switch.data;
4493
4494                                 ieee80211_sta_process_chanswitch(sdata,
4495                                                                  rx_status->mactime,
4496                                                                  rx_status->device_timestamp,
4497                                                                  elems, false);
4498                         }
4499
4500                         kfree(elems);
4501                 }
4502                 break;
4503         }
4504         sdata_unlock(sdata);
4505 }
4506
4507 static void ieee80211_sta_timer(struct timer_list *t)
4508 {
4509         struct ieee80211_sub_if_data *sdata =
4510                 from_timer(sdata, t, u.mgd.timer);
4511
4512         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4513 }
4514
4515 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4516                                    u8 *bssid, u8 reason, bool tx)
4517 {
4518         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4519
4520         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4521                                tx, frame_buf);
4522
4523         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4524                                     reason, false);
4525 }
4526
4527 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4528 {
4529         struct ieee80211_local *local = sdata->local;
4530         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4531         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4532         u32 tx_flags = 0;
4533         u16 trans = 1;
4534         u16 status = 0;
4535         struct ieee80211_prep_tx_info info = {
4536                 .subtype = IEEE80211_STYPE_AUTH,
4537         };
4538
4539         sdata_assert_lock(sdata);
4540
4541         if (WARN_ON_ONCE(!auth_data))
4542                 return -EINVAL;
4543
4544         auth_data->tries++;
4545
4546         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4547                 sdata_info(sdata, "authentication with %pM timed out\n",
4548                            auth_data->bss->bssid);
4549
4550                 /*
4551                  * Most likely AP is not in the range so remove the
4552                  * bss struct for that AP.
4553                  */
4554                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4555
4556                 return -ETIMEDOUT;
4557         }
4558
4559         if (auth_data->algorithm == WLAN_AUTH_SAE)
4560                 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4561
4562         drv_mgd_prepare_tx(local, sdata, &info);
4563
4564         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4565                    auth_data->bss->bssid, auth_data->tries,
4566                    IEEE80211_AUTH_MAX_TRIES);
4567
4568         auth_data->expected_transaction = 2;
4569
4570         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4571                 trans = auth_data->sae_trans;
4572                 status = auth_data->sae_status;
4573                 auth_data->expected_transaction = trans;
4574         }
4575
4576         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4577                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4578                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4579
4580         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4581                             auth_data->data, auth_data->data_len,
4582                             auth_data->bss->bssid,
4583                             auth_data->bss->bssid, NULL, 0, 0,
4584                             tx_flags);
4585
4586         if (tx_flags == 0) {
4587                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4588                         auth_data->timeout = jiffies +
4589                                 IEEE80211_AUTH_TIMEOUT_SAE;
4590                 else
4591                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4592         } else {
4593                 auth_data->timeout =
4594                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4595         }
4596
4597         auth_data->timeout_started = true;
4598         run_again(sdata, auth_data->timeout);
4599
4600         return 0;
4601 }
4602
4603 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4604 {
4605         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4606         struct ieee80211_local *local = sdata->local;
4607         int ret;
4608
4609         sdata_assert_lock(sdata);
4610
4611         assoc_data->tries++;
4612         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4613                 sdata_info(sdata, "association with %pM timed out\n",
4614                            assoc_data->bss->bssid);
4615
4616                 /*
4617                  * Most likely AP is not in the range so remove the
4618                  * bss struct for that AP.
4619                  */
4620                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4621
4622                 return -ETIMEDOUT;
4623         }
4624
4625         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4626                    assoc_data->bss->bssid, assoc_data->tries,
4627                    IEEE80211_ASSOC_MAX_TRIES);
4628         ret = ieee80211_send_assoc(sdata);
4629         if (ret)
4630                 return ret;
4631
4632         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4633                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4634                 assoc_data->timeout_started = true;
4635                 run_again(sdata, assoc_data->timeout);
4636         } else {
4637                 assoc_data->timeout =
4638                         round_jiffies_up(jiffies +
4639                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4640                 assoc_data->timeout_started = true;
4641                 run_again(sdata, assoc_data->timeout);
4642         }
4643
4644         return 0;
4645 }
4646
4647 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4648                                   __le16 fc, bool acked)
4649 {
4650         struct ieee80211_local *local = sdata->local;
4651
4652         sdata->u.mgd.status_fc = fc;
4653         sdata->u.mgd.status_acked = acked;
4654         sdata->u.mgd.status_received = true;
4655
4656         ieee80211_queue_work(&local->hw, &sdata->work);
4657 }
4658
4659 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4660 {
4661         struct ieee80211_local *local = sdata->local;
4662         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4663
4664         sdata_lock(sdata);
4665
4666         if (ifmgd->status_received) {
4667                 __le16 fc = ifmgd->status_fc;
4668                 bool status_acked = ifmgd->status_acked;
4669
4670                 ifmgd->status_received = false;
4671                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4672                         if (status_acked) {
4673                                 if (ifmgd->auth_data->algorithm ==
4674                                     WLAN_AUTH_SAE)
4675                                         ifmgd->auth_data->timeout =
4676                                                 jiffies +
4677                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4678                                 else
4679                                         ifmgd->auth_data->timeout =
4680                                                 jiffies +
4681                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4682                                 run_again(sdata, ifmgd->auth_data->timeout);
4683                         } else {
4684                                 ifmgd->auth_data->timeout = jiffies - 1;
4685                         }
4686                         ifmgd->auth_data->timeout_started = true;
4687                 } else if (ifmgd->assoc_data &&
4688                            (ieee80211_is_assoc_req(fc) ||
4689                             ieee80211_is_reassoc_req(fc))) {
4690                         if (status_acked) {
4691                                 ifmgd->assoc_data->timeout =
4692                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4693                                 run_again(sdata, ifmgd->assoc_data->timeout);
4694                         } else {
4695                                 ifmgd->assoc_data->timeout = jiffies - 1;
4696                         }
4697                         ifmgd->assoc_data->timeout_started = true;
4698                 }
4699         }
4700
4701         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4702             time_after(jiffies, ifmgd->auth_data->timeout)) {
4703                 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
4704                         /*
4705                          * ok ... we waited for assoc or continuation but
4706                          * userspace didn't do it, so kill the auth data
4707                          */
4708                         ieee80211_destroy_auth_data(sdata, false);
4709                 } else if (ieee80211_auth(sdata)) {
4710                         u8 bssid[ETH_ALEN];
4711                         struct ieee80211_event event = {
4712                                 .type = MLME_EVENT,
4713                                 .u.mlme.data = AUTH_EVENT,
4714                                 .u.mlme.status = MLME_TIMEOUT,
4715                         };
4716
4717                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4718
4719                         ieee80211_destroy_auth_data(sdata, false);
4720
4721                         cfg80211_auth_timeout(sdata->dev, bssid);
4722                         drv_event_callback(sdata->local, sdata, &event);
4723                 }
4724         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4725                 run_again(sdata, ifmgd->auth_data->timeout);
4726
4727         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4728             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4729                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4730                     ieee80211_do_assoc(sdata)) {
4731                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4732                         struct ieee80211_event event = {
4733                                 .type = MLME_EVENT,
4734                                 .u.mlme.data = ASSOC_EVENT,
4735                                 .u.mlme.status = MLME_TIMEOUT,
4736                         };
4737
4738                         ieee80211_destroy_assoc_data(sdata, false, false);
4739                         cfg80211_assoc_timeout(sdata->dev, bss);
4740                         drv_event_callback(sdata->local, sdata, &event);
4741                 }
4742         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4743                 run_again(sdata, ifmgd->assoc_data->timeout);
4744
4745         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4746             ifmgd->associated) {
4747                 u8 bssid[ETH_ALEN];
4748                 int max_tries;
4749
4750                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4751
4752                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4753                         max_tries = max_nullfunc_tries;
4754                 else
4755                         max_tries = max_probe_tries;
4756
4757                 /* ACK received for nullfunc probing frame */
4758                 if (!ifmgd->probe_send_count)
4759                         ieee80211_reset_ap_probe(sdata);
4760                 else if (ifmgd->nullfunc_failed) {
4761                         if (ifmgd->probe_send_count < max_tries) {
4762                                 mlme_dbg(sdata,
4763                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4764                                          bssid, ifmgd->probe_send_count,
4765                                          max_tries);
4766                                 ieee80211_mgd_probe_ap_send(sdata);
4767                         } else {
4768                                 mlme_dbg(sdata,
4769                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4770                                          bssid);
4771                                 ieee80211_sta_connection_lost(sdata, bssid,
4772                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4773                                         false);
4774                         }
4775                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4776                         run_again(sdata, ifmgd->probe_timeout);
4777                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4778                         mlme_dbg(sdata,
4779                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4780                                  bssid, probe_wait_ms);
4781                         ieee80211_sta_connection_lost(sdata, bssid,
4782                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4783                 } else if (ifmgd->probe_send_count < max_tries) {
4784                         mlme_dbg(sdata,
4785                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4786                                  bssid, probe_wait_ms,
4787                                  ifmgd->probe_send_count, max_tries);
4788                         ieee80211_mgd_probe_ap_send(sdata);
4789                 } else {
4790                         /*
4791                          * We actually lost the connection ... or did we?
4792                          * Let's make sure!
4793                          */
4794                         mlme_dbg(sdata,
4795                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4796                                  bssid, probe_wait_ms);
4797
4798                         ieee80211_sta_connection_lost(sdata, bssid,
4799                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4800                 }
4801         }
4802
4803         sdata_unlock(sdata);
4804 }
4805
4806 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4807 {
4808         struct ieee80211_sub_if_data *sdata =
4809                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4810         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4811
4812         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4813                 return;
4814
4815         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
4816                 return;
4817
4818         sdata->u.mgd.connection_loss = false;
4819         ieee80211_queue_work(&sdata->local->hw,
4820                              &sdata->u.mgd.beacon_connection_loss_work);
4821 }
4822
4823 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4824 {
4825         struct ieee80211_sub_if_data *sdata =
4826                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4827         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4828         struct ieee80211_local *local = sdata->local;
4829         struct sta_info *sta;
4830         unsigned long timeout;
4831
4832         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4833                 return;
4834
4835         sta = sta_info_get(sdata, ifmgd->bssid);
4836         if (!sta)
4837                 return;
4838
4839         timeout = sta->status_stats.last_ack;
4840         if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx))
4841                 timeout = sta->rx_stats.last_rx;
4842         timeout += IEEE80211_CONNECTION_IDLE_TIME;
4843
4844         /* If timeout is after now, then update timer to fire at
4845          * the later date, but do not actually probe at this time.
4846          */
4847         if (time_is_after_jiffies(timeout)) {
4848                 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
4849                 return;
4850         }
4851
4852         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4853 }
4854
4855 static void ieee80211_sta_monitor_work(struct work_struct *work)
4856 {
4857         struct ieee80211_sub_if_data *sdata =
4858                 container_of(work, struct ieee80211_sub_if_data,
4859                              u.mgd.monitor_work);
4860
4861         ieee80211_mgd_probe_ap(sdata, false);
4862 }
4863
4864 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4865 {
4866         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4867                 __ieee80211_stop_poll(sdata);
4868
4869                 /* let's probe the connection once */
4870                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4871                         ieee80211_queue_work(&sdata->local->hw,
4872                                              &sdata->u.mgd.monitor_work);
4873         }
4874 }
4875
4876 #ifdef CONFIG_PM
4877 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4878 {
4879         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4880         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4881
4882         sdata_lock(sdata);
4883
4884         if (ifmgd->auth_data || ifmgd->assoc_data) {
4885                 const u8 *bssid = ifmgd->auth_data ?
4886                                 ifmgd->auth_data->bss->bssid :
4887                                 ifmgd->assoc_data->bss->bssid;
4888
4889                 /*
4890                  * If we are trying to authenticate / associate while suspending,
4891                  * cfg80211 won't know and won't actually abort those attempts,
4892                  * thus we need to do that ourselves.
4893                  */
4894                 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4895                                                IEEE80211_STYPE_DEAUTH,
4896                                                WLAN_REASON_DEAUTH_LEAVING,
4897                                                false, frame_buf);
4898                 if (ifmgd->assoc_data)
4899                         ieee80211_destroy_assoc_data(sdata, false, true);
4900                 if (ifmgd->auth_data)
4901                         ieee80211_destroy_auth_data(sdata, false);
4902                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4903                                       IEEE80211_DEAUTH_FRAME_LEN,
4904                                       false);
4905         }
4906
4907         /* This is a bit of a hack - we should find a better and more generic
4908          * solution to this. Normally when suspending, cfg80211 will in fact
4909          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4910          * auth (not so important) or assoc (this is the problem) process.
4911          *
4912          * As a consequence, it can happen that we are in the process of both
4913          * associating and suspending, and receive an association response
4914          * after cfg80211 has checked if it needs to disconnect, but before
4915          * we actually set the flag to drop incoming frames. This will then
4916          * cause the workqueue flush to process the association response in
4917          * the suspend, resulting in a successful association just before it
4918          * tries to remove the interface from the driver, which now though
4919          * has a channel context assigned ... this results in issues.
4920          *
4921          * To work around this (for now) simply deauth here again if we're
4922          * now connected.
4923          */
4924         if (ifmgd->associated && !sdata->local->wowlan) {
4925                 u8 bssid[ETH_ALEN];
4926                 struct cfg80211_deauth_request req = {
4927                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4928                         .bssid = bssid,
4929                 };
4930
4931                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4932                 ieee80211_mgd_deauth(sdata, &req);
4933         }
4934
4935         sdata_unlock(sdata);
4936 }
4937 #endif
4938
4939 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4940 {
4941         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4942
4943         sdata_lock(sdata);
4944         if (!ifmgd->associated) {
4945                 sdata_unlock(sdata);
4946                 return;
4947         }
4948
4949         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4950                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4951                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4952                 ieee80211_sta_connection_lost(sdata,
4953                                               ifmgd->associated->bssid,
4954                                               WLAN_REASON_UNSPECIFIED,
4955                                               true);
4956                 sdata_unlock(sdata);
4957                 return;
4958         }
4959
4960         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
4961                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
4962                 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
4963                 ieee80211_sta_connection_lost(sdata,
4964                                               ifmgd->associated->bssid,
4965                                               WLAN_REASON_UNSPECIFIED,
4966                                               true);
4967                 sdata_unlock(sdata);
4968                 return;
4969         }
4970
4971         sdata_unlock(sdata);
4972 }
4973
4974 /* interface setup */
4975 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4976 {
4977         struct ieee80211_if_managed *ifmgd;
4978
4979         ifmgd = &sdata->u.mgd;
4980         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4981         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4982         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4983                   ieee80211_beacon_connection_loss_work);
4984         INIT_WORK(&ifmgd->csa_connection_drop_work,
4985                   ieee80211_csa_connection_drop_work);
4986         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4987         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4988                           ieee80211_tdls_peer_del_work);
4989         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4990         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4991         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4992         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4993         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4994                           ieee80211_sta_handle_tspec_ac_params_wk);
4995
4996         ifmgd->flags = 0;
4997         ifmgd->powersave = sdata->wdev.ps;
4998         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4999         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
5000         ifmgd->p2p_noa_index = -1;
5001
5002         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
5003                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
5004         else
5005                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
5006
5007         /* Setup TDLS data */
5008         spin_lock_init(&ifmgd->teardown_lock);
5009         ifmgd->teardown_skb = NULL;
5010         ifmgd->orig_teardown_skb = NULL;
5011 }
5012
5013 /* scan finished notification */
5014 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
5015 {
5016         struct ieee80211_sub_if_data *sdata;
5017
5018         /* Restart STA timers */
5019         rcu_read_lock();
5020         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
5021                 if (ieee80211_sdata_running(sdata))
5022                         ieee80211_restart_sta_timer(sdata);
5023         }
5024         rcu_read_unlock();
5025 }
5026
5027 static u8 ieee80211_max_rx_chains(struct ieee80211_sub_if_data *sdata,
5028                                   struct cfg80211_bss *cbss)
5029 {
5030         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
5031         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5032         const struct element *ht_cap_elem, *vht_cap_elem;
5033         const struct cfg80211_bss_ies *ies;
5034         const struct ieee80211_ht_cap *ht_cap;
5035         const struct ieee80211_vht_cap *vht_cap;
5036         const struct ieee80211_he_cap_elem *he_cap;
5037         const struct element *he_cap_elem;
5038         u16 mcs_80_map, mcs_160_map;
5039         int i, mcs_nss_size;
5040         bool support_160;
5041         u8 chains = 1;
5042
5043         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
5044                 return chains;
5045
5046         ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
5047         if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
5048                 ht_cap = (void *)ht_cap_elem->data;
5049                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
5050                 /*
5051                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
5052                  *       "Tx Unequal Modulation Supported" fields.
5053                  */
5054         }
5055
5056         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
5057                 return chains;
5058
5059         vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
5060         if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
5061                 u8 nss;
5062                 u16 tx_mcs_map;
5063
5064                 vht_cap = (void *)vht_cap_elem->data;
5065                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
5066                 for (nss = 8; nss > 0; nss--) {
5067                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
5068                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
5069                                 break;
5070                 }
5071                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
5072                 chains = max(chains, nss);
5073         }
5074
5075         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE)
5076                 return chains;
5077
5078         ies = rcu_dereference(cbss->ies);
5079         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
5080                                              ies->data, ies->len);
5081
5082         if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
5083                 return chains;
5084
5085         /* skip one byte ext_tag_id */
5086         he_cap = (void *)(he_cap_elem->data + 1);
5087         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
5088
5089         /* invalid HE IE */
5090         if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
5091                 return chains;
5092
5093         /* mcs_nss is right after he_cap info */
5094         he_mcs_nss_supp = (void *)(he_cap + 1);
5095
5096         mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
5097
5098         for (i = 7; i >= 0; i--) {
5099                 u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
5100
5101                 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5102                         chains = max_t(u8, chains, i + 1);
5103                         break;
5104                 }
5105         }
5106
5107         support_160 = he_cap->phy_cap_info[0] &
5108                       IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
5109
5110         if (!support_160)
5111                 return chains;
5112
5113         mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
5114         for (i = 7; i >= 0; i--) {
5115                 u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
5116
5117                 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5118                         chains = max_t(u8, chains, i + 1);
5119                         break;
5120                 }
5121         }
5122
5123         return chains;
5124 }
5125
5126 static bool
5127 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
5128                                      const struct cfg80211_bss_ies *ies,
5129                                      const struct ieee80211_he_operation *he_op)
5130 {
5131         const struct element *he_cap_elem;
5132         const struct ieee80211_he_cap_elem *he_cap;
5133         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
5134         u16 mcs_80_map_tx, mcs_80_map_rx;
5135         u16 ap_min_req_set;
5136         int mcs_nss_size;
5137         int nss;
5138
5139         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
5140                                              ies->data, ies->len);
5141
5142         /* invalid HE IE */
5143         if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
5144                 sdata_info(sdata,
5145                            "Invalid HE elem, Disable HE\n");
5146                 return false;
5147         }
5148
5149         /* skip one byte ext_tag_id */
5150         he_cap = (void *)(he_cap_elem->data + 1);
5151         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
5152
5153         /* invalid HE IE */
5154         if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
5155                 sdata_info(sdata,
5156                            "Invalid HE elem with nss size, Disable HE\n");
5157                 return false;
5158         }
5159
5160         /* mcs_nss is right after he_cap info */
5161         he_mcs_nss_supp = (void *)(he_cap + 1);
5162
5163         mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
5164         mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
5165
5166         /* P802.11-REVme/D0.3
5167          * 27.1.1 Introduction to the HE PHY
5168          * ...
5169          * An HE STA shall support the following features:
5170          * ...
5171          * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
5172          * supported channel widths for HE SU PPDUs
5173          */
5174         if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5175             (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
5176                 sdata_info(sdata,
5177                            "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
5178                            mcs_80_map_tx, mcs_80_map_rx);
5179                 return false;
5180         }
5181
5182         if (!he_op)
5183                 return true;
5184
5185         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
5186
5187         /* make sure the AP is consistent with itself
5188          *
5189          * P802.11-REVme/D0.3
5190          * 26.17.1 Basic HE BSS operation
5191          *
5192          * A STA that is operating in an HE BSS shall be able to receive and
5193          * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
5194          * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
5195          * MLME-START.request primitive and shall be able to receive at each of
5196          * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
5197          * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
5198          * primitive
5199          */
5200         for (nss = 8; nss > 0; nss--) {
5201                 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
5202                 u8 ap_rx_val;
5203                 u8 ap_tx_val;
5204
5205                 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
5206                         continue;
5207
5208                 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
5209                 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
5210
5211                 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5212                     ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5213                     ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
5214                         sdata_info(sdata,
5215                                    "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
5216                                    nss, ap_rx_val, ap_rx_val, ap_op_val);
5217                         return false;
5218                 }
5219         }
5220
5221         return true;
5222 }
5223
5224 static bool
5225 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
5226                                     struct ieee80211_supported_band *sband,
5227                                     const struct ieee80211_he_operation *he_op)
5228 {
5229         const struct ieee80211_sta_he_cap *sta_he_cap =
5230                 ieee80211_get_he_iftype_cap(sband,
5231                                             ieee80211_vif_type_p2p(&sdata->vif));
5232         u16 ap_min_req_set;
5233         int i;
5234
5235         if (!sta_he_cap || !he_op)
5236                 return false;
5237
5238         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
5239
5240         /* Need to go over for 80MHz, 160MHz and for 80+80 */
5241         for (i = 0; i < 3; i++) {
5242                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
5243                         &sta_he_cap->he_mcs_nss_supp;
5244                 u16 sta_mcs_map_rx =
5245                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
5246                 u16 sta_mcs_map_tx =
5247                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
5248                 u8 nss;
5249                 bool verified = true;
5250
5251                 /*
5252                  * For each band there is a maximum of 8 spatial streams
5253                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
5254                  * of 2 bits per NSS (1-8), with the values defined in enum
5255                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
5256                  * capabilities aren't less than the AP's minimum requirements
5257                  * for this HE BSS per SS.
5258                  * It is enough to find one such band that meets the reqs.
5259                  */
5260                 for (nss = 8; nss > 0; nss--) {
5261                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
5262                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
5263                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
5264
5265                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
5266                                 continue;
5267
5268                         /*
5269                          * Make sure the HE AP doesn't require MCSs that aren't
5270                          * supported by the client as required by spec
5271                          *
5272                          * P802.11-REVme/D0.3
5273                          * 26.17.1 Basic HE BSS operation
5274                          *
5275                          * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
5276                          * a BSS, unless it supports (i.e., is able to both transmit and
5277                          * receive using) all of the <HE-MCS, NSS> tuples in the basic
5278                          * HE-MCS and NSS set.
5279                          */
5280                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5281                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
5282                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
5283                                 verified = false;
5284                                 break;
5285                         }
5286                 }
5287
5288                 if (verified)
5289                         return true;
5290         }
5291
5292         /* If here, STA doesn't meet AP's HE min requirements */
5293         return false;
5294 }
5295
5296 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
5297                                   struct cfg80211_bss *cbss)
5298 {
5299         struct ieee80211_local *local = sdata->local;
5300         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5301         const struct ieee80211_ht_cap *ht_cap = NULL;
5302         const struct ieee80211_ht_operation *ht_oper = NULL;
5303         const struct ieee80211_vht_operation *vht_oper = NULL;
5304         const struct ieee80211_he_operation *he_oper = NULL;
5305         const struct ieee80211_eht_operation *eht_oper = NULL;
5306         const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
5307         struct ieee80211_supported_band *sband;
5308         struct cfg80211_chan_def chandef;
5309         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
5310         bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
5311         struct ieee80211_bss *bss = (void *)cbss->priv;
5312         struct ieee802_11_elems *elems;
5313         const struct cfg80211_bss_ies *ies;
5314         int ret;
5315         u32 i;
5316         bool have_80mhz;
5317
5318         rcu_read_lock();
5319
5320         ies = rcu_dereference(cbss->ies);
5321         elems = ieee802_11_parse_elems(ies->data, ies->len, false,
5322                                        NULL, NULL);
5323         if (!elems) {
5324                 rcu_read_unlock();
5325                 return -ENOMEM;
5326         }
5327
5328         sband = local->hw.wiphy->bands[cbss->channel->band];
5329
5330         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
5331                           IEEE80211_STA_DISABLE_80P80MHZ |
5332                           IEEE80211_STA_DISABLE_160MHZ);
5333
5334         /* disable HT/VHT/HE if we don't support them */
5335         if (!sband->ht_cap.ht_supported && !is_6ghz) {
5336                 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
5337                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5338                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5339                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5340                 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5341         }
5342
5343         if (!sband->vht_cap.vht_supported && is_5ghz) {
5344                 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
5345                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5346                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5347                 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5348         }
5349
5350         if (!ieee80211_get_he_iftype_cap(sband,
5351                                          ieee80211_vif_type_p2p(&sdata->vif))) {
5352                 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
5353                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5354                 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5355         }
5356
5357         if (!ieee80211_get_eht_iftype_cap(sband,
5358                                           ieee80211_vif_type_p2p(&sdata->vif))) {
5359                 mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
5360                 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5361         }
5362
5363         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
5364                 ht_oper = elems->ht_operation;
5365                 ht_cap = elems->ht_cap_elem;
5366
5367                 if (!ht_cap) {
5368                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5369                         ht_oper = NULL;
5370                 }
5371         }
5372
5373         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
5374                 vht_oper = elems->vht_operation;
5375                 if (vht_oper && !ht_oper) {
5376                         vht_oper = NULL;
5377                         sdata_info(sdata,
5378                                    "AP advertised VHT without HT, disabling HT/VHT/HE\n");
5379                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5380                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5381                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5382                         ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5383                 }
5384
5385                 if (!elems->vht_cap_elem) {
5386                         sdata_info(sdata,
5387                                    "bad VHT capabilities, disabling VHT\n");
5388                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5389                         vht_oper = NULL;
5390                 }
5391         }
5392
5393         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
5394                 he_oper = elems->he_operation;
5395
5396                 if (is_6ghz) {
5397                         struct ieee80211_bss_conf *bss_conf;
5398                         u8 i, j = 0;
5399
5400                         bss_conf = &sdata->vif.bss_conf;
5401
5402                         if (elems->pwr_constr_elem)
5403                                 bss_conf->pwr_reduction = *elems->pwr_constr_elem;
5404
5405                         BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
5406                                      ARRAY_SIZE(elems->tx_pwr_env));
5407
5408                         for (i = 0; i < elems->tx_pwr_env_num; i++) {
5409                                 if (elems->tx_pwr_env_len[i] >
5410                                     sizeof(bss_conf->tx_pwr_env[j]))
5411                                         continue;
5412
5413                                 bss_conf->tx_pwr_env_num++;
5414                                 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
5415                                        elems->tx_pwr_env_len[i]);
5416                                 j++;
5417                         }
5418                 }
5419
5420                 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
5421                     !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
5422                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE |
5423                                         IEEE80211_STA_DISABLE_EHT;
5424         }
5425
5426         /*
5427          * EHT requires HE to be supported as well. Specifically for 6 GHz
5428          * channels, the operation channel information can only be deduced from
5429          * both the 6 GHz operation information (from the HE operation IE) and
5430          * EHT operation.
5431          */
5432         if (!(ifmgd->flags & (IEEE80211_STA_DISABLE_HE |
5433                               IEEE80211_STA_DISABLE_EHT)) && he_oper) {
5434                 const struct cfg80211_bss_ies *ies;
5435                 const u8 *eht_oper_ie;
5436
5437                 ies = rcu_dereference(cbss->ies);
5438                 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
5439                                                    ies->data, ies->len);
5440                 if (eht_oper_ie && eht_oper_ie[1] >=
5441                     1 + sizeof(struct ieee80211_eht_operation))
5442                         eht_oper = (void *)(eht_oper_ie + 3);
5443                 else
5444                         eht_oper = NULL;
5445         }
5446
5447         /* Allow VHT if at least one channel on the sband supports 80 MHz */
5448         have_80mhz = false;
5449         for (i = 0; i < sband->n_channels; i++) {
5450                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
5451                                                 IEEE80211_CHAN_NO_80MHZ))
5452                         continue;
5453
5454                 have_80mhz = true;
5455                 break;
5456         }
5457
5458         if (!have_80mhz) {
5459                 sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
5460                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5461         }
5462
5463         if (sband->band == NL80211_BAND_S1GHZ) {
5464                 s1g_oper = elems->s1g_oper;
5465                 if (!s1g_oper)
5466                         sdata_info(sdata,
5467                                    "AP missing S1G operation element?\n");
5468         }
5469
5470         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
5471                                                      cbss->channel,
5472                                                      bss->vht_cap_info,
5473                                                      ht_oper, vht_oper,
5474                                                      he_oper, eht_oper,
5475                                                      s1g_oper,
5476                                                      &chandef, false);
5477
5478         sdata->needed_rx_chains = min(ieee80211_max_rx_chains(sdata, cbss),
5479                                       local->rx_chains);
5480
5481         rcu_read_unlock();
5482         /* the element data was RCU protected so no longer valid anyway */
5483         kfree(elems);
5484         elems = NULL;
5485
5486         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
5487                 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
5488                 return -EINVAL;
5489         }
5490
5491         /* will change later if needed */
5492         sdata->smps_mode = IEEE80211_SMPS_OFF;
5493
5494         mutex_lock(&local->mtx);
5495         /*
5496          * If this fails (possibly due to channel context sharing
5497          * on incompatible channels, e.g. 80+80 and 160 sharing the
5498          * same control channel) try to use a smaller bandwidth.
5499          */
5500         ret = ieee80211_vif_use_channel(sdata, &chandef,
5501                                         IEEE80211_CHANCTX_SHARED);
5502
5503         /* don't downgrade for 5 and 10 MHz channels, though. */
5504         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
5505             chandef.width == NL80211_CHAN_WIDTH_10)
5506                 goto out;
5507
5508         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
5509                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
5510                 ret = ieee80211_vif_use_channel(sdata, &chandef,
5511                                                 IEEE80211_CHANCTX_SHARED);
5512         }
5513  out:
5514         mutex_unlock(&local->mtx);
5515         return ret;
5516 }
5517
5518 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
5519                                u8 *dtim_count, u8 *dtim_period)
5520 {
5521         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
5522         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
5523                                          ies->len);
5524         const struct ieee80211_tim_ie *tim = NULL;
5525         const struct ieee80211_bssid_index *idx;
5526         bool valid = tim_ie && tim_ie[1] >= 2;
5527
5528         if (valid)
5529                 tim = (void *)(tim_ie + 2);
5530
5531         if (dtim_count)
5532                 *dtim_count = valid ? tim->dtim_count : 0;
5533
5534         if (dtim_period)
5535                 *dtim_period = valid ? tim->dtim_period : 0;
5536
5537         /* Check if value is overridden by non-transmitted profile */
5538         if (!idx_ie || idx_ie[1] < 3)
5539                 return valid;
5540
5541         idx = (void *)(idx_ie + 2);
5542
5543         if (dtim_count)
5544                 *dtim_count = idx->dtim_count;
5545
5546         if (dtim_period)
5547                 *dtim_period = idx->dtim_period;
5548
5549         return true;
5550 }
5551
5552 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5553                                      struct cfg80211_bss *cbss, bool assoc,
5554                                      bool override)
5555 {
5556         struct ieee80211_local *local = sdata->local;
5557         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5558         struct ieee80211_bss *bss = (void *)cbss->priv;
5559         struct sta_info *new_sta = NULL;
5560         struct ieee80211_supported_band *sband;
5561         bool have_sta = false;
5562         int err;
5563
5564         sband = local->hw.wiphy->bands[cbss->channel->band];
5565
5566         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
5567                 return -EINVAL;
5568
5569         /* If a reconfig is happening, bail out */
5570         if (local->in_reconfig)
5571                 return -EBUSY;
5572
5573         if (assoc) {
5574                 rcu_read_lock();
5575                 have_sta = sta_info_get(sdata, cbss->bssid);
5576                 rcu_read_unlock();
5577         }
5578
5579         if (!have_sta) {
5580                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
5581                 if (!new_sta)
5582                         return -ENOMEM;
5583         }
5584
5585         /*
5586          * Set up the information for the new channel before setting the
5587          * new channel. We can't - completely race-free - change the basic
5588          * rates bitmap and the channel (sband) that it refers to, but if
5589          * we set it up before we at least avoid calling into the driver's
5590          * bss_info_changed() method with invalid information (since we do
5591          * call that from changing the channel - only for IDLE and perhaps
5592          * some others, but ...).
5593          *
5594          * So to avoid that, just set up all the new information before the
5595          * channel, but tell the driver to apply it only afterwards, since
5596          * it might need the new channel for that.
5597          */
5598         if (new_sta) {
5599                 u32 rates = 0, basic_rates = 0;
5600                 bool have_higher_than_11mbit = false;
5601                 int min_rate = INT_MAX, min_rate_index = -1;
5602                 const struct cfg80211_bss_ies *ies;
5603                 int shift = ieee80211_vif_get_shift(&sdata->vif);
5604
5605                 /* TODO: S1G Basic Rate Set is expressed elsewhere */
5606                 if (cbss->channel->band == NL80211_BAND_S1GHZ) {
5607                         ieee80211_s1g_sta_rate_init(new_sta);
5608                         goto skip_rates;
5609                 }
5610
5611                 ieee80211_get_rates(sband, bss->supp_rates,
5612                                     bss->supp_rates_len,
5613                                     &rates, &basic_rates,
5614                                     &have_higher_than_11mbit,
5615                                     &min_rate, &min_rate_index,
5616                                     shift);
5617
5618                 /*
5619                  * This used to be a workaround for basic rates missing
5620                  * in the association response frame. Now that we no
5621                  * longer use the basic rates from there, it probably
5622                  * doesn't happen any more, but keep the workaround so
5623                  * in case some *other* APs are buggy in different ways
5624                  * we can connect -- with a warning.
5625                  * Allow this workaround only in case the AP provided at least
5626                  * one rate.
5627                  */
5628                 if (min_rate_index < 0) {
5629                         sdata_info(sdata,
5630                                    "No legacy rates in association response\n");
5631
5632                         sta_info_free(local, new_sta);
5633                         return -EINVAL;
5634                 } else if (!basic_rates) {
5635                         sdata_info(sdata,
5636                                    "No basic rates, using min rate instead\n");
5637                         basic_rates = BIT(min_rate_index);
5638                 }
5639
5640                 if (rates)
5641                         new_sta->sta.supp_rates[cbss->channel->band] = rates;
5642                 else
5643                         sdata_info(sdata,
5644                                    "No rates found, keeping mandatory only\n");
5645
5646                 sdata->vif.bss_conf.basic_rates = basic_rates;
5647
5648                 /* cf. IEEE 802.11 9.2.12 */
5649                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
5650                     have_higher_than_11mbit)
5651                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
5652                 else
5653                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
5654
5655 skip_rates:
5656                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
5657
5658                 /* set timing information */
5659                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5660                 rcu_read_lock();
5661                 ies = rcu_dereference(cbss->beacon_ies);
5662                 if (ies) {
5663                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5664                         sdata->vif.bss_conf.sync_device_ts =
5665                                 bss->device_ts_beacon;
5666
5667                         ieee80211_get_dtim(ies,
5668                                            &sdata->vif.bss_conf.sync_dtim_count,
5669                                            NULL);
5670                 } else if (!ieee80211_hw_check(&sdata->local->hw,
5671                                                TIMING_BEACON_ONLY)) {
5672                         ies = rcu_dereference(cbss->proberesp_ies);
5673                         /* must be non-NULL since beacon IEs were NULL */
5674                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5675                         sdata->vif.bss_conf.sync_device_ts =
5676                                 bss->device_ts_presp;
5677                         sdata->vif.bss_conf.sync_dtim_count = 0;
5678                 } else {
5679                         sdata->vif.bss_conf.sync_tsf = 0;
5680                         sdata->vif.bss_conf.sync_device_ts = 0;
5681                         sdata->vif.bss_conf.sync_dtim_count = 0;
5682                 }
5683                 rcu_read_unlock();
5684         }
5685
5686         if (new_sta || override) {
5687                 err = ieee80211_prep_channel(sdata, cbss);
5688                 if (err) {
5689                         if (new_sta)
5690                                 sta_info_free(local, new_sta);
5691                         return -EINVAL;
5692                 }
5693         }
5694
5695         if (new_sta) {
5696                 /*
5697                  * tell driver about BSSID, basic rates and timing
5698                  * this was set up above, before setting the channel
5699                  */
5700                 ieee80211_bss_info_change_notify(sdata,
5701                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5702                         BSS_CHANGED_BEACON_INT);
5703
5704                 if (assoc)
5705                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5706
5707                 err = sta_info_insert(new_sta);
5708                 new_sta = NULL;
5709                 if (err) {
5710                         sdata_info(sdata,
5711                                    "failed to insert STA entry for the AP (error %d)\n",
5712                                    err);
5713                         return err;
5714                 }
5715         } else
5716                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5717
5718         /* Cancel scan to ensure that nothing interferes with connection */
5719         if (local->scanning)
5720                 ieee80211_scan_cancel(local);
5721
5722         return 0;
5723 }
5724
5725 /* config hooks */
5726 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5727                        struct cfg80211_auth_request *req)
5728 {
5729         struct ieee80211_local *local = sdata->local;
5730         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5731         struct ieee80211_mgd_auth_data *auth_data;
5732         u16 auth_alg;
5733         int err;
5734         bool cont_auth;
5735
5736         /* prepare auth data structure */
5737
5738         switch (req->auth_type) {
5739         case NL80211_AUTHTYPE_OPEN_SYSTEM:
5740                 auth_alg = WLAN_AUTH_OPEN;
5741                 break;
5742         case NL80211_AUTHTYPE_SHARED_KEY:
5743                 if (fips_enabled)
5744                         return -EOPNOTSUPP;
5745                 auth_alg = WLAN_AUTH_SHARED_KEY;
5746                 break;
5747         case NL80211_AUTHTYPE_FT:
5748                 auth_alg = WLAN_AUTH_FT;
5749                 break;
5750         case NL80211_AUTHTYPE_NETWORK_EAP:
5751                 auth_alg = WLAN_AUTH_LEAP;
5752                 break;
5753         case NL80211_AUTHTYPE_SAE:
5754                 auth_alg = WLAN_AUTH_SAE;
5755                 break;
5756         case NL80211_AUTHTYPE_FILS_SK:
5757                 auth_alg = WLAN_AUTH_FILS_SK;
5758                 break;
5759         case NL80211_AUTHTYPE_FILS_SK_PFS:
5760                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5761                 break;
5762         case NL80211_AUTHTYPE_FILS_PK:
5763                 auth_alg = WLAN_AUTH_FILS_PK;
5764                 break;
5765         default:
5766                 return -EOPNOTSUPP;
5767         }
5768
5769         if (ifmgd->assoc_data)
5770                 return -EBUSY;
5771
5772         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5773                             req->ie_len, GFP_KERNEL);
5774         if (!auth_data)
5775                 return -ENOMEM;
5776
5777         auth_data->bss = req->bss;
5778
5779         if (req->auth_data_len >= 4) {
5780                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5781                         __le16 *pos = (__le16 *) req->auth_data;
5782
5783                         auth_data->sae_trans = le16_to_cpu(pos[0]);
5784                         auth_data->sae_status = le16_to_cpu(pos[1]);
5785                 }
5786                 memcpy(auth_data->data, req->auth_data + 4,
5787                        req->auth_data_len - 4);
5788                 auth_data->data_len += req->auth_data_len - 4;
5789         }
5790
5791         /* Check if continuing authentication or trying to authenticate with the
5792          * same BSS that we were in the process of authenticating with and avoid
5793          * removal and re-addition of the STA entry in
5794          * ieee80211_prep_connection().
5795          */
5796         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5797
5798         if (req->ie && req->ie_len) {
5799                 memcpy(&auth_data->data[auth_data->data_len],
5800                        req->ie, req->ie_len);
5801                 auth_data->data_len += req->ie_len;
5802         }
5803
5804         if (req->key && req->key_len) {
5805                 auth_data->key_len = req->key_len;
5806                 auth_data->key_idx = req->key_idx;
5807                 memcpy(auth_data->key, req->key, req->key_len);
5808         }
5809
5810         auth_data->algorithm = auth_alg;
5811
5812         /* try to authenticate/probe */
5813
5814         if (ifmgd->auth_data) {
5815                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5816                         auth_data->peer_confirmed =
5817                                 ifmgd->auth_data->peer_confirmed;
5818                 }
5819                 ieee80211_destroy_auth_data(sdata, cont_auth);
5820         }
5821
5822         /* prep auth_data so we don't go into idle on disassoc */
5823         ifmgd->auth_data = auth_data;
5824
5825         /* If this is continuation of an ongoing SAE authentication exchange
5826          * (i.e., request to send SAE Confirm) and the peer has already
5827          * confirmed, mark authentication completed since we are about to send
5828          * out SAE Confirm.
5829          */
5830         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5831             auth_data->peer_confirmed && auth_data->sae_trans == 2)
5832                 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5833
5834         if (ifmgd->associated) {
5835                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5836
5837                 sdata_info(sdata,
5838                            "disconnect from AP %pM for new auth to %pM\n",
5839                            ifmgd->associated->bssid, req->bss->bssid);
5840                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5841                                        WLAN_REASON_UNSPECIFIED,
5842                                        false, frame_buf);
5843
5844                 ieee80211_report_disconnect(sdata, frame_buf,
5845                                             sizeof(frame_buf), true,
5846                                             WLAN_REASON_UNSPECIFIED,
5847                                             false);
5848         }
5849
5850         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5851
5852         err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5853         if (err)
5854                 goto err_clear;
5855
5856         err = ieee80211_auth(sdata);
5857         if (err) {
5858                 sta_info_destroy_addr(sdata, req->bss->bssid);
5859                 goto err_clear;
5860         }
5861
5862         /* hold our own reference */
5863         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5864         return 0;
5865
5866  err_clear:
5867         eth_zero_addr(ifmgd->bssid);
5868         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5869         ifmgd->auth_data = NULL;
5870         mutex_lock(&sdata->local->mtx);
5871         ieee80211_vif_release_channel(sdata);
5872         mutex_unlock(&sdata->local->mtx);
5873         kfree(auth_data);
5874         return err;
5875 }
5876
5877 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5878                         struct cfg80211_assoc_request *req)
5879 {
5880         bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ;
5881         bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ;
5882         struct ieee80211_local *local = sdata->local;
5883         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5884         struct ieee80211_bss *bss = (void *)req->bss->priv;
5885         struct ieee80211_mgd_assoc_data *assoc_data;
5886         const struct cfg80211_bss_ies *beacon_ies;
5887         struct ieee80211_supported_band *sband;
5888         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5889         const struct element *ssid_elem, *ht_elem, *vht_elem;
5890         int i, err;
5891         bool override = false;
5892
5893         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5894         if (!assoc_data)
5895                 return -ENOMEM;
5896
5897         rcu_read_lock();
5898         ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID);
5899         if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
5900                 rcu_read_unlock();
5901                 kfree(assoc_data);
5902                 return -EINVAL;
5903         }
5904         memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
5905         assoc_data->ssid_len = ssid_elem->datalen;
5906         memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len);
5907         bss_conf->ssid_len = assoc_data->ssid_len;
5908         rcu_read_unlock();
5909
5910         if (ifmgd->associated) {
5911                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5912
5913                 sdata_info(sdata,
5914                            "disconnect from AP %pM for new assoc to %pM\n",
5915                            ifmgd->associated->bssid, req->bss->bssid);
5916                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5917                                        WLAN_REASON_UNSPECIFIED,
5918                                        false, frame_buf);
5919
5920                 ieee80211_report_disconnect(sdata, frame_buf,
5921                                             sizeof(frame_buf), true,
5922                                             WLAN_REASON_UNSPECIFIED,
5923                                             false);
5924         }
5925
5926         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5927                 err = -EBUSY;
5928                 goto err_free;
5929         }
5930
5931         if (ifmgd->assoc_data) {
5932                 err = -EBUSY;
5933                 goto err_free;
5934         }
5935
5936         if (ifmgd->auth_data) {
5937                 bool match;
5938
5939                 /* keep sta info, bssid if matching */
5940                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5941                 ieee80211_destroy_auth_data(sdata, match);
5942         }
5943
5944         /* prepare assoc data */
5945
5946         ifmgd->beacon_crc_valid = false;
5947
5948         assoc_data->wmm = bss->wmm_used &&
5949                           (local->hw.queues >= IEEE80211_NUM_ACS);
5950
5951         /*
5952          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5953          * We still associate in non-HT mode (11a/b/g) if any one of these
5954          * ciphers is configured as pairwise.
5955          * We can set this to true for non-11n hardware, that'll be checked
5956          * separately along with the peer capabilities.
5957          */
5958         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5959                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5960                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5961                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5962                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5963                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5964                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5965                         ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5966                         netdev_info(sdata->dev,
5967                                     "disabling HT/VHT/HE due to WEP/TKIP use\n");
5968                 }
5969         }
5970
5971         sband = local->hw.wiphy->bands[req->bss->channel->band];
5972
5973         /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
5974         if (!bss->wmm_used) {
5975                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5976                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5977                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5978                 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
5979                 netdev_info(sdata->dev,
5980                             "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5981         }
5982
5983         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5984         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5985                sizeof(ifmgd->ht_capa_mask));
5986
5987         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5988         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5989                sizeof(ifmgd->vht_capa_mask));
5990
5991         memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
5992         memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
5993                sizeof(ifmgd->s1g_capa_mask));
5994
5995         if (req->ie && req->ie_len) {
5996                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5997                 assoc_data->ie_len = req->ie_len;
5998         }
5999
6000         if (req->fils_kek) {
6001                 /* should already be checked in cfg80211 - so warn */
6002                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
6003                         err = -EINVAL;
6004                         goto err_free;
6005                 }
6006                 memcpy(assoc_data->fils_kek, req->fils_kek,
6007                        req->fils_kek_len);
6008                 assoc_data->fils_kek_len = req->fils_kek_len;
6009         }
6010
6011         if (req->fils_nonces)
6012                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
6013                        2 * FILS_NONCE_LEN);
6014
6015         assoc_data->bss = req->bss;
6016         assoc_data->capability = req->bss->capability;
6017         assoc_data->supp_rates = bss->supp_rates;
6018         assoc_data->supp_rates_len = bss->supp_rates_len;
6019
6020         rcu_read_lock();
6021         ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION);
6022         if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
6023                 assoc_data->ap_ht_param =
6024                         ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
6025         else if (!is_6ghz)
6026                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
6027         vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY);
6028         if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
6029                 memcpy(&assoc_data->ap_vht_cap, vht_elem->data,
6030                        sizeof(struct ieee80211_vht_cap));
6031         } else if (is_5ghz) {
6032                 sdata_info(sdata,
6033                            "VHT capa missing/short, disabling VHT/HE/EHT\n");
6034                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT |
6035                                 IEEE80211_STA_DISABLE_HE |
6036                                 IEEE80211_STA_DISABLE_EHT;
6037         }
6038         rcu_read_unlock();
6039
6040         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
6041                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
6042              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
6043                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
6044
6045         if (bss->wmm_used && bss->uapsd_supported &&
6046             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
6047                 assoc_data->uapsd = true;
6048                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
6049         } else {
6050                 assoc_data->uapsd = false;
6051                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
6052         }
6053
6054         if (req->prev_bssid)
6055                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
6056
6057         if (req->use_mfp) {
6058                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
6059                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
6060         } else {
6061                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
6062                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
6063         }
6064
6065         if (req->flags & ASSOC_REQ_USE_RRM)
6066                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
6067         else
6068                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
6069
6070         if (req->crypto.control_port)
6071                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
6072         else
6073                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
6074
6075         sdata->control_port_protocol = req->crypto.control_port_ethertype;
6076         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
6077         sdata->control_port_over_nl80211 =
6078                                         req->crypto.control_port_over_nl80211;
6079         sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
6080         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
6081                                                         sdata->vif.type);
6082
6083         /* kick off associate process */
6084
6085         ifmgd->assoc_data = assoc_data;
6086         ifmgd->dtim_period = 0;
6087         ifmgd->have_beacon = false;
6088
6089         /* override HT/VHT configuration only if the AP and we support it */
6090         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
6091                 struct ieee80211_sta_ht_cap sta_ht_cap;
6092
6093                 if (req->flags & ASSOC_REQ_DISABLE_HT)
6094                         override = true;
6095
6096                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
6097                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
6098
6099                 /* check for 40 MHz disable override */
6100                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
6101                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
6102                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
6103                         override = true;
6104
6105                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
6106                     req->flags & ASSOC_REQ_DISABLE_VHT)
6107                         override = true;
6108         }
6109
6110         if (req->flags & ASSOC_REQ_DISABLE_HT) {
6111                 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
6112                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
6113                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
6114                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
6115                 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
6116         }
6117
6118         if (req->flags & ASSOC_REQ_DISABLE_VHT) {
6119                 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
6120                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
6121         }
6122
6123         if (req->flags & ASSOC_REQ_DISABLE_HE) {
6124                 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
6125                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
6126                 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
6127         }
6128
6129         err = ieee80211_prep_connection(sdata, req->bss, true, override);
6130         if (err)
6131                 goto err_clear;
6132
6133         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
6134                 if (ifmgd->powersave)
6135                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
6136                 else
6137                         sdata->smps_mode = IEEE80211_SMPS_OFF;
6138         } else {
6139                 sdata->smps_mode = ifmgd->req_smps;
6140         }
6141
6142         rcu_read_lock();
6143         beacon_ies = rcu_dereference(req->bss->beacon_ies);
6144
6145         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
6146             !beacon_ies) {
6147                 /*
6148                  * Wait up to one beacon interval ...
6149                  * should this be more if we miss one?
6150                  */
6151                 sdata_info(sdata, "waiting for beacon from %pM\n",
6152                            ifmgd->bssid);
6153                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
6154                 assoc_data->timeout_started = true;
6155                 assoc_data->need_beacon = true;
6156         } else if (beacon_ies) {
6157                 const struct element *elem;
6158                 u8 dtim_count = 0;
6159
6160                 ieee80211_get_dtim(beacon_ies, &dtim_count,
6161                                    &ifmgd->dtim_period);
6162
6163                 ifmgd->have_beacon = true;
6164                 assoc_data->timeout = jiffies;
6165                 assoc_data->timeout_started = true;
6166
6167                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
6168                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
6169                         sdata->vif.bss_conf.sync_device_ts =
6170                                 bss->device_ts_beacon;
6171                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
6172                 }
6173
6174                 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
6175                                               beacon_ies->data, beacon_ies->len);
6176                 if (elem && elem->datalen >= 3)
6177                         sdata->vif.bss_conf.profile_periodicity = elem->data[2];
6178                 else
6179                         sdata->vif.bss_conf.profile_periodicity = 0;
6180
6181                 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
6182                                           beacon_ies->data, beacon_ies->len);
6183                 if (elem && elem->datalen >= 11 &&
6184                     (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6185                         sdata->vif.bss_conf.ema_ap = true;
6186                 else
6187                         sdata->vif.bss_conf.ema_ap = false;
6188         } else {
6189                 assoc_data->timeout = jiffies;
6190                 assoc_data->timeout_started = true;
6191         }
6192         rcu_read_unlock();
6193
6194         run_again(sdata, assoc_data->timeout);
6195
6196         if (bss->corrupt_data) {
6197                 char *corrupt_type = "data";
6198                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
6199                         if (bss->corrupt_data &
6200                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
6201                                 corrupt_type = "beacon and probe response";
6202                         else
6203                                 corrupt_type = "beacon";
6204                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
6205                         corrupt_type = "probe response";
6206                 sdata_info(sdata, "associating with AP with corrupt %s\n",
6207                            corrupt_type);
6208         }
6209
6210         return 0;
6211  err_clear:
6212         eth_zero_addr(ifmgd->bssid);
6213         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
6214         ifmgd->assoc_data = NULL;
6215  err_free:
6216         kfree(assoc_data);
6217         return err;
6218 }
6219
6220 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
6221                          struct cfg80211_deauth_request *req)
6222 {
6223         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6224         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6225         bool tx = !req->local_state_change;
6226         struct ieee80211_prep_tx_info info = {
6227                 .subtype = IEEE80211_STYPE_DEAUTH,
6228         };
6229
6230         if (ifmgd->auth_data &&
6231             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
6232                 sdata_info(sdata,
6233                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
6234                            req->bssid, req->reason_code,
6235                            ieee80211_get_reason_code_string(req->reason_code));
6236
6237                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
6238                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
6239                                                IEEE80211_STYPE_DEAUTH,
6240                                                req->reason_code, tx,
6241                                                frame_buf);
6242                 ieee80211_destroy_auth_data(sdata, false);
6243                 ieee80211_report_disconnect(sdata, frame_buf,
6244                                             sizeof(frame_buf), true,
6245                                             req->reason_code, false);
6246                 drv_mgd_complete_tx(sdata->local, sdata, &info);
6247                 return 0;
6248         }
6249
6250         if (ifmgd->assoc_data &&
6251             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
6252                 sdata_info(sdata,
6253                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
6254                            req->bssid, req->reason_code,
6255                            ieee80211_get_reason_code_string(req->reason_code));
6256
6257                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
6258                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
6259                                                IEEE80211_STYPE_DEAUTH,
6260                                                req->reason_code, tx,
6261                                                frame_buf);
6262                 ieee80211_destroy_assoc_data(sdata, false, true);
6263                 ieee80211_report_disconnect(sdata, frame_buf,
6264                                             sizeof(frame_buf), true,
6265                                             req->reason_code, false);
6266                 return 0;
6267         }
6268
6269         if (ifmgd->associated &&
6270             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
6271                 sdata_info(sdata,
6272                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
6273                            req->bssid, req->reason_code,
6274                            ieee80211_get_reason_code_string(req->reason_code));
6275
6276                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6277                                        req->reason_code, tx, frame_buf);
6278                 ieee80211_report_disconnect(sdata, frame_buf,
6279                                             sizeof(frame_buf), true,
6280                                             req->reason_code, false);
6281                 drv_mgd_complete_tx(sdata->local, sdata, &info);
6282                 return 0;
6283         }
6284
6285         return -ENOTCONN;
6286 }
6287
6288 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
6289                            struct cfg80211_disassoc_request *req)
6290 {
6291         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6292         u8 bssid[ETH_ALEN];
6293         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6294
6295         /*
6296          * cfg80211 should catch this ... but it's racy since
6297          * we can receive a disassoc frame, process it, hand it
6298          * to cfg80211 while that's in a locked section already
6299          * trying to tell us that the user wants to disconnect.
6300          */
6301         if (ifmgd->associated != req->bss)
6302                 return -ENOLINK;
6303
6304         sdata_info(sdata,
6305                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
6306                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
6307
6308         memcpy(bssid, req->bss->bssid, ETH_ALEN);
6309         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
6310                                req->reason_code, !req->local_state_change,
6311                                frame_buf);
6312
6313         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
6314                                     req->reason_code, false);
6315
6316         return 0;
6317 }
6318
6319 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
6320 {
6321         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6322
6323         /*
6324          * Make sure some work items will not run after this,
6325          * they will not do anything but might not have been
6326          * cancelled when disconnecting.
6327          */
6328         cancel_work_sync(&ifmgd->monitor_work);
6329         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
6330         cancel_work_sync(&ifmgd->request_smps_work);
6331         cancel_work_sync(&ifmgd->csa_connection_drop_work);
6332         cancel_work_sync(&ifmgd->chswitch_work);
6333         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
6334
6335         sdata_lock(sdata);
6336         if (ifmgd->assoc_data) {
6337                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
6338                 ieee80211_destroy_assoc_data(sdata, false, false);
6339                 cfg80211_assoc_timeout(sdata->dev, bss);
6340         }
6341         if (ifmgd->auth_data)
6342                 ieee80211_destroy_auth_data(sdata, false);
6343         spin_lock_bh(&ifmgd->teardown_lock);
6344         if (ifmgd->teardown_skb) {
6345                 kfree_skb(ifmgd->teardown_skb);
6346                 ifmgd->teardown_skb = NULL;
6347                 ifmgd->orig_teardown_skb = NULL;
6348         }
6349         kfree(ifmgd->assoc_req_ies);
6350         ifmgd->assoc_req_ies = NULL;
6351         ifmgd->assoc_req_ies_len = 0;
6352         spin_unlock_bh(&ifmgd->teardown_lock);
6353         del_timer_sync(&ifmgd->timer);
6354         sdata_unlock(sdata);
6355 }
6356
6357 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
6358                                enum nl80211_cqm_rssi_threshold_event rssi_event,
6359                                s32 rssi_level,
6360                                gfp_t gfp)
6361 {
6362         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
6363
6364         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
6365
6366         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
6367 }
6368 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
6369
6370 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
6371 {
6372         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
6373
6374         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
6375
6376         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
6377 }
6378 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);