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 - 2022 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 ieee80211_conn_flags_t
 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 147                              struct ieee80211_link_data *link,
 148                              ieee80211_conn_flags_t conn_flags,
 149                              struct ieee80211_supported_band *sband,
 150                              struct ieee80211_channel *channel,
 151                              u32 vht_cap_info,
 152                              const struct ieee80211_ht_operation *ht_oper,
 153                              const struct ieee80211_vht_operation *vht_oper,
 154                              const struct ieee80211_he_operation *he_oper,
 155                              const struct ieee80211_eht_operation *eht_oper,
 156                              const struct ieee80211_s1g_oper_ie *s1g_oper,
 157                              struct cfg80211_chan_def *chandef, bool tracking)
 158 {
 159         struct cfg80211_chan_def vht_chandef;
 160         struct ieee80211_sta_ht_cap sta_ht_cap;
 161         ieee80211_conn_flags_t ret;
 162         u32 ht_cfreq;
 163
 164         memset(chandef, 0, sizeof(struct cfg80211_chan_def));
 165         chandef->chan = channel;
 166         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 167         chandef->center_freq1 = channel->center_freq;
 168         chandef->freq1_offset = channel->freq_offset;
 169
 170         if (channel->band == NL80211_BAND_6GHZ) {
 171                 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
 172                                                     chandef)) {
 173                         mlme_dbg(sdata,
 174                                  "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
 175                         ret = IEEE80211_CONN_DISABLE_HT |
 176                               IEEE80211_CONN_DISABLE_VHT |
 177                               IEEE80211_CONN_DISABLE_HE |
 178                               IEEE80211_CONN_DISABLE_EHT;
 179                 } else {
 180                         ret = 0;
 181                 }
 182                 vht_chandef = *chandef;
 183                 goto out;
 184         } else if (sband->band == NL80211_BAND_S1GHZ) {
 185                 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
 186                         sdata_info(sdata,
 187                                    "Missing S1G Operation Element? Trying operating == primary\n");
 188                         chandef->width = ieee80211_s1g_channel_width(channel);
 189                 }
 190
 191                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ |
 192                       IEEE80211_CONN_DISABLE_VHT |
 193                       IEEE80211_CONN_DISABLE_80P80MHZ |
 194                       IEEE80211_CONN_DISABLE_160MHZ;
 195                 goto out;
 196         }
 197
 198         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 199         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 200
 201         if (!ht_oper || !sta_ht_cap.ht_supported) {
 202                 mlme_dbg(sdata, "HT operation missing / HT not supported\n");
 203                 ret = IEEE80211_CONN_DISABLE_HT |
 204                       IEEE80211_CONN_DISABLE_VHT |
 205                       IEEE80211_CONN_DISABLE_HE |
 206                       IEEE80211_CONN_DISABLE_EHT;
 207                 goto out;
 208         }
 209
 210         chandef->width = NL80211_CHAN_WIDTH_20;
 211
 212         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 213                                                   channel->band);
 214         /* check that channel matches the right operating channel */
 215         if (!tracking && channel->center_freq != ht_cfreq) {
 216                 /*
 217                  * It's possible that some APs are confused here;
 218                  * Netgear WNDR3700 sometimes reports 4 higher than
 219                  * the actual channel in association responses, but
 220                  * since we look at probe response/beacon data here
 221                  * it should be OK.
 222                  */
 223                 sdata_info(sdata,
 224                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 225                            channel->center_freq, ht_cfreq,
 226                            ht_oper->primary_chan, channel->band);
 227                 ret = IEEE80211_CONN_DISABLE_HT |
 228                       IEEE80211_CONN_DISABLE_VHT |
 229                       IEEE80211_CONN_DISABLE_HE |
 230                       IEEE80211_CONN_DISABLE_EHT;
 231                 goto out;
 232         }
 233
 234         /* check 40 MHz support, if we have it */
 235         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 236                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 237         } else {
 238                 mlme_dbg(sdata, "40 MHz not supported\n");
 239                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 240                 ret = IEEE80211_CONN_DISABLE_VHT;
 241                 /* also mark 40 MHz disabled */
 242                 ret |= IEEE80211_CONN_DISABLE_40MHZ;
 243                 goto out;
 244         }
 245
 246         if (!vht_oper || !sband->vht_cap.vht_supported) {
 247                 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n");
 248                 ret = IEEE80211_CONN_DISABLE_VHT;
 249                 goto out;
 250         }
 251
 252         vht_chandef = *chandef;
 253         if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) &&
 254             he_oper &&
 255             (le32_to_cpu(he_oper->he_oper_params) &
 256              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
 257                 struct ieee80211_vht_operation he_oper_vht_cap;
 258
 259                 /*
 260                  * Set only first 3 bytes (other 2 aren't used in
 261                  * ieee80211_chandef_vht_oper() anyway)
 262                  */
 263                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
 264                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
 265
 266                 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
 267                                                 &he_oper_vht_cap, ht_oper,
 268                                                 &vht_chandef)) {
 269                         if (!(conn_flags & IEEE80211_CONN_DISABLE_HE))
 270                                 sdata_info(sdata,
 271                                            "HE AP VHT information is invalid, disabling HE\n");
 272                         ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
 273                         goto out;
 274                 }
 275         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
 276                                                vht_cap_info,
 277                                                vht_oper, ht_oper,
 278                                                &vht_chandef)) {
 279                 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
 280                         sdata_info(sdata,
 281                                    "AP VHT information is invalid, disabling VHT\n");
 282                 ret = IEEE80211_CONN_DISABLE_VHT;
 283                 goto out;
 284         }
 285
 286         if (!cfg80211_chandef_valid(&vht_chandef)) {
 287                 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
 288                         sdata_info(sdata,
 289                                    "AP VHT information is invalid, disabling VHT\n");
 290                 ret = IEEE80211_CONN_DISABLE_VHT;
 291                 goto out;
 292         }
 293
 294         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 295                 ret = 0;
 296                 goto out;
 297         }
 298
 299         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 300                 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
 301                         sdata_info(sdata,
 302                                    "AP VHT information doesn't match HT, disabling VHT\n");
 303                 ret = IEEE80211_CONN_DISABLE_VHT;
 304                 goto out;
 305         }
 306
 307         *chandef = vht_chandef;
 308
 309         /*
 310          * handle the case that the EHT operation indicates that it holds EHT
 311          * operation information (in case that the channel width differs from
 312          * the channel width reported in HT/VHT/HE).
 313          */
 314         if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
 315                 struct cfg80211_chan_def eht_chandef = *chandef;
 316
 317                 ieee80211_chandef_eht_oper(eht_oper,
 318                                            eht_chandef.width ==
 319                                            NL80211_CHAN_WIDTH_160,
 320                                            false, &eht_chandef);
 321
 322                 if (!cfg80211_chandef_valid(&eht_chandef)) {
 323                         if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
 324                                 sdata_info(sdata,
 325                                            "AP EHT information is invalid, disabling EHT\n");
 326                         ret = IEEE80211_CONN_DISABLE_EHT;
 327                         goto out;
 328                 }
 329
 330                 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) {
 331                         if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
 332                                 sdata_info(sdata,
 333                                            "AP EHT information is incompatible, disabling EHT\n");
 334                         ret = IEEE80211_CONN_DISABLE_EHT;
 335                         goto out;
 336                 }
 337
 338                 *chandef = eht_chandef;
 339         }
 340
 341         ret = 0;
 342
 343 out:
 344         /*
 345          * When tracking the current AP, don't do any further checks if the
 346          * new chandef is identical to the one we're currently using for the
 347          * connection. This keeps us from playing ping-pong with regulatory,
 348          * without it the following can happen (for example):
 349          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 350          *  - AP advertises regdom US
 351          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 352          *  - the code below detects an unsupported channel, downgrades, and
 353          *    we disconnect from the AP in the caller
 354          *  - disconnect causes CRDA to reload world regdomain and the game
 355          *    starts anew.
 356          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 357          *
 358          * It seems possible that there are still scenarios with CSA or real
 359          * bandwidth changes where a this could happen, but those cases are
 360          * less common and wouldn't completely prevent using the AP.
 361          */
 362         if (tracking &&
 363             cfg80211_chandef_identical(chandef, &link->conf->chandef))
 364                 return ret;
 365
 366         /* don't print the message below for VHT mismatch if VHT is disabled */
 367         if (ret & IEEE80211_CONN_DISABLE_VHT)
 368                 vht_chandef = *chandef;
 369
 370         /*
 371          * Ignore the DISABLED flag when we're already connected and only
 372          * tracking the APs beacon for bandwidth changes - otherwise we
 373          * might get disconnected here if we connect to an AP, update our
 374          * regulatory information based on the AP's country IE and the
 375          * information we have is wrong/outdated and disables the channel
 376          * that we're actually using for the connection to the AP.
 377          */
 378         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 379                                         tracking ? 0 :
 380                                                    IEEE80211_CHAN_DISABLED)) {
 381                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 382                         ret = IEEE80211_CONN_DISABLE_HT |
 383                               IEEE80211_CONN_DISABLE_VHT |
 384                               IEEE80211_CONN_DISABLE_HE |
 385                               IEEE80211_CONN_DISABLE_EHT;
 386                         break;
 387                 }
 388
 389                 ret |= ieee80211_chandef_downgrade(chandef);
 390         }
 391
 392         if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
 393                                                  IEEE80211_CHAN_NO_HE))
 394                 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
 395
 396         if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
 397                                                   IEEE80211_CHAN_NO_EHT))
 398                 ret |= IEEE80211_CONN_DISABLE_EHT;
 399
 400         if (chandef->width != vht_chandef.width && !tracking)
 401                 sdata_info(sdata,
 402                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 403
 404         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 405         return ret;
 406 }
 407
 408 static int ieee80211_config_bw(struct ieee80211_link_data *link,
 409                                const struct ieee80211_ht_cap *ht_cap,
 410                                const struct ieee80211_vht_cap *vht_cap,
 411                                const struct ieee80211_ht_operation *ht_oper,
 412                                const struct ieee80211_vht_operation *vht_oper,
 413                                const struct ieee80211_he_operation *he_oper,
 414                                const struct ieee80211_eht_operation *eht_oper,
 415                                const struct ieee80211_s1g_oper_ie *s1g_oper,
 416                                const u8 *bssid, u32 *changed)
 417 {
 418         struct ieee80211_sub_if_data *sdata = link->sdata;
 419         struct ieee80211_local *local = sdata->local;
 420         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 421         struct ieee80211_channel *chan = link->conf->chandef.chan;
 422         struct ieee80211_supported_band *sband =
 423                 local->hw.wiphy->bands[chan->band];
 424         struct cfg80211_chan_def chandef;
 425         u16 ht_opmode;
 426         ieee80211_conn_flags_t flags;
 427         u32 vht_cap_info = 0;
 428         int ret;
 429
 430         /* if HT was/is disabled, don't track any bandwidth changes */
 431         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper)
 432                 return 0;
 433
 434         /* don't check VHT if we associated as non-VHT station */
 435         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
 436                 vht_oper = NULL;
 437
 438         /* don't check HE if we associated as non-HE station */
 439         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE ||
 440             !ieee80211_get_he_iftype_cap(sband,
 441                                          ieee80211_vif_type_p2p(&sdata->vif))) {
 442                 he_oper = NULL;
 443                 eht_oper = NULL;
 444         }
 445
 446         /* don't check EHT if we associated as non-EHT station */
 447         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT ||
 448             !ieee80211_get_eht_iftype_cap(sband,
 449                                          ieee80211_vif_type_p2p(&sdata->vif)))
 450                 eht_oper = NULL;
 451
 452         /*
 453          * if bss configuration changed store the new one -
 454          * this may be applicable even if channel is identical
 455          */
 456         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 457         if (link->conf->ht_operation_mode != ht_opmode) {
 458                 *changed |= BSS_CHANGED_HT;
 459                 link->conf->ht_operation_mode = ht_opmode;
 460         }
 461
 462         if (vht_cap)
 463                 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
 464
 465         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
 466         flags = ieee80211_determine_chantype(sdata, link,
 467                                              link->u.mgd.conn_flags,
 468                                              sband, chan, vht_cap_info,
 469                                              ht_oper, vht_oper,
 470                                              he_oper, eht_oper,
 471                                              s1g_oper, &chandef, true);
 472
 473         /*
 474          * Downgrade the new channel if we associated with restricted
 475          * capabilities. For example, if we associated as a 20 MHz STA
 476          * to a 40 MHz AP (due to regulatory, capabilities or config
 477          * reasons) then switching to a 40 MHz channel now won't do us
 478          * any good -- we couldn't use it with the AP.
 479          */
 480         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
 481             chandef.width == NL80211_CHAN_WIDTH_80P80)
 482                 flags |= ieee80211_chandef_downgrade(&chandef);
 483         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
 484             chandef.width == NL80211_CHAN_WIDTH_160)
 485                 flags |= ieee80211_chandef_downgrade(&chandef);
 486         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ &&
 487             chandef.width > NL80211_CHAN_WIDTH_20)
 488                 flags |= ieee80211_chandef_downgrade(&chandef);
 489
 490         if (cfg80211_chandef_identical(&chandef, &link->conf->chandef))
 491                 return 0;
 492
 493         link_info(link,
 494                   "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
 495                   link->u.mgd.bssid, chandef.chan->center_freq,
 496                   chandef.chan->freq_offset, chandef.width,
 497                   chandef.center_freq1, chandef.freq1_offset,
 498                   chandef.center_freq2);
 499
 500         if (flags != (link->u.mgd.conn_flags &
 501                                 (IEEE80211_CONN_DISABLE_HT |
 502                                  IEEE80211_CONN_DISABLE_VHT |
 503                                  IEEE80211_CONN_DISABLE_HE |
 504                                  IEEE80211_CONN_DISABLE_EHT |
 505                                  IEEE80211_CONN_DISABLE_40MHZ |
 506                                  IEEE80211_CONN_DISABLE_80P80MHZ |
 507                                  IEEE80211_CONN_DISABLE_160MHZ |
 508                                  IEEE80211_CONN_DISABLE_320MHZ)) ||
 509             !cfg80211_chandef_valid(&chandef)) {
 510                 sdata_info(sdata,
 511                            "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
 512                            link->u.mgd.bssid, flags, ifmgd->flags);
 513                 return -EINVAL;
 514         }
 515
 516         ret = ieee80211_link_change_bandwidth(link, &chandef, changed);
 517
 518         if (ret) {
 519                 sdata_info(sdata,
 520                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 521                            link->u.mgd.bssid);
 522                 return ret;
 523         }
 524
 525         return 0;
 526 }
 527
 528 /* frame sending functions */
 529
 530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 531                                 struct sk_buff *skb, u8 ap_ht_param,
 532                                 struct ieee80211_supported_band *sband,
 533                                 struct ieee80211_channel *channel,
 534                                 enum ieee80211_smps_mode smps,
 535                                 ieee80211_conn_flags_t conn_flags)
 536 {
 537         u8 *pos;
 538         u32 flags = channel->flags;
 539         u16 cap;
 540         struct ieee80211_sta_ht_cap ht_cap;
 541
 542         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 543
 544         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 545         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 546
 547         /* determine capability flags */
 548         cap = ht_cap.cap;
 549
 550         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 551         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 552                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 553                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 554                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 555                 }
 556                 break;
 557         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 558                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 559                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 560                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 561                 }
 562                 break;
 563         }
 564
 565         /*
 566          * If 40 MHz was disabled associate as though we weren't
 567          * capable of 40 MHz -- some broken APs will never fall
 568          * back to trying to transmit in 20 MHz.
 569          */
 570         if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) {
 571                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 572                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 573         }
 574
 575         /* set SM PS mode properly */
 576         cap &= ~IEEE80211_HT_CAP_SM_PS;
 577         switch (smps) {
 578         case IEEE80211_SMPS_AUTOMATIC:
 579         case IEEE80211_SMPS_NUM_MODES:
 580                 WARN_ON(1);
 581                 fallthrough;
 582         case IEEE80211_SMPS_OFF:
 583                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 584                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 585                 break;
 586         case IEEE80211_SMPS_STATIC:
 587                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 588                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 589                 break;
 590         case IEEE80211_SMPS_DYNAMIC:
 591                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 592                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 593                 break;
 594         }
 595
 596         /* reserve and fill IE */
 597         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 598         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 599 }
 600
 601 /* This function determines vht capability flags for the association
 602  * and builds the IE.
 603  * Note - the function returns true to own the MU-MIMO capability
 604  */
 605 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 606                                  struct sk_buff *skb,
 607                                  struct ieee80211_supported_band *sband,
 608                                  struct ieee80211_vht_cap *ap_vht_cap,
 609                                  ieee80211_conn_flags_t conn_flags)
 610 {
 611         struct ieee80211_local *local = sdata->local;
 612         u8 *pos;
 613         u32 cap;
 614         struct ieee80211_sta_vht_cap vht_cap;
 615         u32 mask, ap_bf_sts, our_bf_sts;
 616         bool mu_mimo_owner = false;
 617
 618         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 619
 620         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 621         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 622
 623         /* determine capability flags */
 624         cap = vht_cap.cap;
 625
 626         if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) {
 627                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 628
 629                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 630                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 631                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 632                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 633         }
 634
 635         if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) {
 636                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 637                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 638         }
 639
 640         /*
 641          * Some APs apparently get confused if our capabilities are better
 642          * than theirs, so restrict what we advertise in the assoc request.
 643          */
 644         if (!(ap_vht_cap->vht_cap_info &
 645                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 646                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 647                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 648         else if (!(ap_vht_cap->vht_cap_info &
 649                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 650                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 651
 652         /*
 653          * If some other vif is using the MU-MIMO capability we cannot associate
 654          * using MU-MIMO - this will lead to contradictions in the group-id
 655          * mechanism.
 656          * Ownership is defined since association request, in order to avoid
 657          * simultaneous associations with MU-MIMO.
 658          */
 659         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 660                 bool disable_mu_mimo = false;
 661                 struct ieee80211_sub_if_data *other;
 662
 663                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 664                         if (other->vif.bss_conf.mu_mimo_owner) {
 665                                 disable_mu_mimo = true;
 666                                 break;
 667                         }
 668                 }
 669                 if (disable_mu_mimo)
 670                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 671                 else
 672                         mu_mimo_owner = true;
 673         }
 674
 675         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 676
 677         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 678         our_bf_sts = cap & mask;
 679
 680         if (ap_bf_sts < our_bf_sts) {
 681                 cap &= ~mask;
 682                 cap |= ap_bf_sts;
 683         }
 684
 685         /* reserve and fill IE */
 686         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 687         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 688
 689         return mu_mimo_owner;
 690 }
 691
 692 /* This function determines HE capability flags for the association
 693  * and builds the IE.
 694  */
 695 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 696                                 struct sk_buff *skb,
 697                                 struct ieee80211_supported_band *sband,
 698                                 enum ieee80211_smps_mode smps_mode,
 699                                 ieee80211_conn_flags_t conn_flags)
 700 {
 701         u8 *pos, *pre_he_pos;
 702         const struct ieee80211_sta_he_cap *he_cap;
 703         u8 he_cap_size;
 704
 705         he_cap = ieee80211_get_he_iftype_cap(sband,
 706                                              ieee80211_vif_type_p2p(&sdata->vif));
 707         if (WARN_ON(!he_cap))
 708                 return;
 709
 710         /* get a max size estimate */
 711         he_cap_size =
 712                 2 + 1 + sizeof(he_cap->he_cap_elem) +
 713                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 714                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 715                                       he_cap->he_cap_elem.phy_cap_info);
 716         pos = skb_put(skb, he_cap_size);
 717         pre_he_pos = pos;
 718         pos = ieee80211_ie_build_he_cap(conn_flags,
 719                                         pos, he_cap, pos + he_cap_size);
 720         /* trim excess if any */
 721         skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
 722
 723         ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb);
 724 }
 725
 726 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
 727                                  struct sk_buff *skb,
 728                                  struct ieee80211_supported_band *sband)
 729 {
 730         u8 *pos;
 731         const struct ieee80211_sta_he_cap *he_cap;
 732         const struct ieee80211_sta_eht_cap *eht_cap;
 733         u8 eht_cap_size;
 734
 735         he_cap = ieee80211_get_he_iftype_cap(sband,
 736                                              ieee80211_vif_type_p2p(&sdata->vif));
 737         eht_cap = ieee80211_get_eht_iftype_cap(sband,
 738                                                ieee80211_vif_type_p2p(&sdata->vif));
 739
 740         /*
 741          * EHT capabilities element is only added if the HE capabilities element
 742          * was added so assume that 'he_cap' is valid and don't check it.
 743          */
 744         if (WARN_ON(!he_cap || !eht_cap))
 745                 return;
 746
 747         eht_cap_size =
 748                 2 + 1 + sizeof(eht_cap->eht_cap_elem) +
 749                 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
 750                                            &eht_cap->eht_cap_elem,
 751                                            false) +
 752                 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
 753                                        eht_cap->eht_cap_elem.phy_cap_info);
 754         pos = skb_put(skb, eht_cap_size);
 755         ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size,
 756                                    false);
 757 }
 758
 759 static void ieee80211_assoc_add_rates(struct sk_buff *skb,
 760                                       enum nl80211_chan_width width,
 761                                       struct ieee80211_supported_band *sband,
 762                                       struct ieee80211_mgd_assoc_data *assoc_data)
 763 {
 764         unsigned int shift = ieee80211_chanwidth_get_shift(width);
 765         unsigned int rates_len, supp_rates_len;
 766         u32 rates = 0;
 767         int i, count;
 768         u8 *pos;
 769
 770         if (assoc_data->supp_rates_len) {
 771                 /*
 772                  * Get all rates supported by the device and the AP as
 773                  * some APs don't like getting a superset of their rates
 774                  * in the association request (e.g. D-Link DAP 1353 in
 775                  * b-only mode)...
 776                  */
 777                 rates_len = ieee80211_parse_bitrates(width, sband,
 778                                                      assoc_data->supp_rates,
 779                                                      assoc_data->supp_rates_len,
 780                                                      &rates);
 781         } else {
 782                 /*
 783                  * In case AP not provide any supported rates information
 784                  * before association, we send information element(s) with
 785                  * all rates that we support.
 786                  */
 787                 rates_len = sband->n_bitrates;
 788                 for (i = 0; i < sband->n_bitrates; i++)
 789                         rates |= BIT(i);
 790         }
 791
 792         supp_rates_len = rates_len;
 793         if (supp_rates_len > 8)
 794                 supp_rates_len = 8;
 795
 796         pos = skb_put(skb, supp_rates_len + 2);
 797         *pos++ = WLAN_EID_SUPP_RATES;
 798         *pos++ = supp_rates_len;
 799
 800         count = 0;
 801         for (i = 0; i < sband->n_bitrates; i++) {
 802                 if (BIT(i) & rates) {
 803                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 804                                                 5 * (1 << shift));
 805                         *pos++ = (u8)rate;
 806                         if (++count == 8)
 807                                 break;
 808                 }
 809         }
 810
 811         if (rates_len > count) {
 812                 pos = skb_put(skb, rates_len - count + 2);
 813                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 814                 *pos++ = rates_len - count;
 815
 816                 for (i++; i < sband->n_bitrates; i++) {
 817                         if (BIT(i) & rates) {
 818                                 int rate;
 819
 820                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 821                                                     5 * (1 << shift));
 822                                 *pos++ = (u8)rate;
 823                         }
 824                 }
 825         }
 826 }
 827
 828 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb,
 829                                             const u8 *elems,
 830                                             size_t elems_len,
 831                                             size_t offset)
 832 {
 833         size_t noffset;
 834
 835         static const u8 before_ht[] = {
 836                 WLAN_EID_SSID,
 837                 WLAN_EID_SUPP_RATES,
 838                 WLAN_EID_EXT_SUPP_RATES,
 839                 WLAN_EID_PWR_CAPABILITY,
 840                 WLAN_EID_SUPPORTED_CHANNELS,
 841                 WLAN_EID_RSN,
 842                 WLAN_EID_QOS_CAPA,
 843                 WLAN_EID_RRM_ENABLED_CAPABILITIES,
 844                 WLAN_EID_MOBILITY_DOMAIN,
 845                 WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 846                 WLAN_EID_RIC_DATA,              /* reassoc only */
 847                 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 848         };
 849         static const u8 after_ric[] = {
 850                 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 851                 WLAN_EID_HT_CAPABILITY,
 852                 WLAN_EID_BSS_COEX_2040,
 853                 /* luckily this is almost always there */
 854                 WLAN_EID_EXT_CAPABILITY,
 855                 WLAN_EID_QOS_TRAFFIC_CAPA,
 856                 WLAN_EID_TIM_BCAST_REQ,
 857                 WLAN_EID_INTERWORKING,
 858                 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 859                 WLAN_EID_VHT_CAPABILITY,
 860                 WLAN_EID_OPMODE_NOTIF,
 861         };
 862
 863         if (!elems_len)
 864                 return offset;
 865
 866         noffset = ieee80211_ie_split_ric(elems, elems_len,
 867                                          before_ht,
 868                                          ARRAY_SIZE(before_ht),
 869                                          after_ric,
 870                                          ARRAY_SIZE(after_ric),
 871                                          offset);
 872         skb_put_data(skb, elems + offset, noffset - offset);
 873
 874         return noffset;
 875 }
 876
 877 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb,
 878                                              const u8 *elems,
 879                                              size_t elems_len,
 880                                              size_t offset)
 881 {
 882         static const u8 before_vht[] = {
 883                 /*
 884                  * no need to list the ones split off before HT
 885                  * or generated here
 886                  */
 887                 WLAN_EID_BSS_COEX_2040,
 888                 WLAN_EID_EXT_CAPABILITY,
 889                 WLAN_EID_QOS_TRAFFIC_CAPA,
 890                 WLAN_EID_TIM_BCAST_REQ,
 891                 WLAN_EID_INTERWORKING,
 892                 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 893         };
 894         size_t noffset;
 895
 896         if (!elems_len)
 897                 return offset;
 898
 899         /* RIC already taken care of in ieee80211_add_before_ht_elems() */
 900         noffset = ieee80211_ie_split(elems, elems_len,
 901                                      before_vht, ARRAY_SIZE(before_vht),
 902                                      offset);
 903         skb_put_data(skb, elems + offset, noffset - offset);
 904
 905         return noffset;
 906 }
 907
 908 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb,
 909                                             const u8 *elems,
 910                                             size_t elems_len,
 911                                             size_t offset)
 912 {
 913         static const u8 before_he[] = {
 914                 /*
 915                  * no need to list the ones split off before VHT
 916                  * or generated here
 917                  */
 918                 WLAN_EID_OPMODE_NOTIF,
 919                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
 920                 /* 11ai elements */
 921                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
 922                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
 923                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
 924                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
 925                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
 926                 /* TODO: add 11ah/11aj/11ak elements */
 927         };
 928         size_t noffset;
 929
 930         if (!elems_len)
 931                 return offset;
 932
 933         /* RIC already taken care of in ieee80211_add_before_ht_elems() */
 934         noffset = ieee80211_ie_split(elems, elems_len,
 935                                      before_he, ARRAY_SIZE(before_he),
 936                                      offset);
 937         skb_put_data(skb, elems + offset, noffset - offset);
 938
 939         return noffset;
 940 }
 941
 942 #define PRESENT_ELEMS_MAX       8
 943 #define PRESENT_ELEM_EXT_OFFS   0x100
 944
 945 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
 946                                         struct sk_buff *skb, u16 capab,
 947                                         const struct element *ext_capa,
 948                                         const u16 *present_elems);
 949
 950 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata,
 951                                          struct sk_buff *skb, u16 *capab,
 952                                          const struct element *ext_capa,
 953                                          const u8 *extra_elems,
 954                                          size_t extra_elems_len,
 955                                          unsigned int link_id,
 956                                          struct ieee80211_link_data *link,
 957                                          u16 *present_elems)
 958 {
 959         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
 960         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 961         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 962         struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
 963         struct ieee80211_channel *chan = cbss->channel;
 964         const struct ieee80211_sband_iftype_data *iftd;
 965         struct ieee80211_local *local = sdata->local;
 966         struct ieee80211_supported_band *sband;
 967         enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20;
 968         struct ieee80211_chanctx_conf *chanctx_conf;
 969         enum ieee80211_smps_mode smps_mode;
 970         u16 orig_capab = *capab;
 971         size_t offset = 0;
 972         int present_elems_len = 0;
 973         u8 *pos;
 974         int i;
 975
 976 #define ADD_PRESENT_ELEM(id) do {                                       \
 977         /* need a last for termination - we use 0 == SSID */            \
 978         if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1))       \
 979                 present_elems[present_elems_len++] = (id);              \
 980 } while (0)
 981 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id))
 982
 983         if (link)
 984                 smps_mode = link->smps_mode;
 985         else if (sdata->u.mgd.powersave)
 986                 smps_mode = IEEE80211_SMPS_DYNAMIC;
 987         else
 988                 smps_mode = IEEE80211_SMPS_OFF;
 989
 990         if (link) {
 991                 /*
 992                  * 5/10 MHz scenarios are only viable without MLO, in which
 993                  * case this pointer should be used ... All of this is a bit
 994                  * unclear though, not sure this even works at all.
 995                  */
 996                 rcu_read_lock();
 997                 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
 998                 if (chanctx_conf)
 999                         width = chanctx_conf->def.width;
1000                 rcu_read_unlock();
1001         }
1002
1003         sband = local->hw.wiphy->bands[chan->band];
1004         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1005
1006         if (sband->band == NL80211_BAND_2GHZ) {
1007                 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
1008                 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
1009         }
1010
1011         if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
1012             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
1013                 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
1014
1015         if (sband->band != NL80211_BAND_S1GHZ)
1016                 ieee80211_assoc_add_rates(skb, width, sband, assoc_data);
1017
1018         if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
1019             *capab & WLAN_CAPABILITY_RADIO_MEASURE) {
1020                 struct cfg80211_chan_def chandef = {
1021                         .width = width,
1022                         .chan = chan,
1023                 };
1024
1025                 pos = skb_put(skb, 4);
1026                 *pos++ = WLAN_EID_PWR_CAPABILITY;
1027                 *pos++ = 2;
1028                 *pos++ = 0; /* min tx power */
1029                  /* max tx power */
1030                 *pos++ = ieee80211_chandef_max_power(&chandef);
1031                 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
1032         }
1033
1034         /*
1035          * Per spec, we shouldn't include the list of channels if we advertise
1036          * support for extended channel switching, but we've always done that;
1037          * (for now?) apply this restriction only on the (new) 6 GHz band.
1038          */
1039         if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
1040             (sband->band != NL80211_BAND_6GHZ ||
1041              !ext_capa || ext_capa->datalen < 1 ||
1042              !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
1043                 /* TODO: get this in reg domain format */
1044                 pos = skb_put(skb, 2 * sband->n_channels + 2);
1045                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
1046                 *pos++ = 2 * sband->n_channels;
1047                 for (i = 0; i < sband->n_channels; i++) {
1048                         int cf = sband->channels[i].center_freq;
1049
1050                         *pos++ = ieee80211_frequency_to_channel(cf);
1051                         *pos++ = 1; /* one channel in the subband*/
1052                 }
1053                 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
1054         }
1055
1056         /* if present, add any custom IEs that go before HT */
1057         offset = ieee80211_add_before_ht_elems(skb, extra_elems,
1058                                                extra_elems_len,
1059                                                offset);
1060
1061         if (sband->band != NL80211_BAND_6GHZ &&
1062             !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) {
1063                 ieee80211_add_ht_ie(sdata, skb,
1064                                     assoc_data->link[link_id].ap_ht_param,
1065                                     sband, chan, smps_mode,
1066                                     assoc_data->link[link_id].conn_flags);
1067                 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
1068         }
1069
1070         /* if present, add any custom IEs that go before VHT */
1071         offset = ieee80211_add_before_vht_elems(skb, extra_elems,
1072                                                 extra_elems_len,
1073                                                 offset);
1074
1075         if (sband->band != NL80211_BAND_6GHZ &&
1076             !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
1077                 bool mu_mimo_owner =
1078                         ieee80211_add_vht_ie(sdata, skb, sband,
1079                                              &assoc_data->link[link_id].ap_vht_cap,
1080                                              assoc_data->link[link_id].conn_flags);
1081
1082                 if (link)
1083                         link->conf->mu_mimo_owner = mu_mimo_owner;
1084                 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
1085         }
1086
1087         /*
1088          * If AP doesn't support HT, mark HE and EHT as disabled.
1089          * If on the 5GHz band, make sure it supports VHT.
1090          */
1091         if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT ||
1092             (sband->band == NL80211_BAND_5GHZ &&
1093              assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT))
1094                 assoc_data->link[link_id].conn_flags |=
1095                         IEEE80211_CONN_DISABLE_HE |
1096                         IEEE80211_CONN_DISABLE_EHT;
1097
1098         /* if present, add any custom IEs that go before HE */
1099         offset = ieee80211_add_before_he_elems(skb, extra_elems,
1100                                                extra_elems_len,
1101                                                offset);
1102
1103         if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) {
1104                 ieee80211_add_he_ie(sdata, skb, sband, smps_mode,
1105                                     assoc_data->link[link_id].conn_flags);
1106                 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
1107         }
1108
1109         /*
1110          * careful - need to know about all the present elems before
1111          * calling ieee80211_assoc_add_ml_elem(), so add this one if
1112          * we're going to put it after the ML element
1113          */
1114         if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1115                 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY);
1116
1117         if (link_id == assoc_data->assoc_link_id)
1118                 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa,
1119                                             present_elems);
1120
1121         /* crash if somebody gets it wrong */
1122         present_elems = NULL;
1123
1124         if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1125                 ieee80211_add_eht_ie(sdata, skb, sband);
1126
1127         if (sband->band == NL80211_BAND_S1GHZ) {
1128                 ieee80211_add_aid_request_ie(sdata, skb);
1129                 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1130         }
1131
1132         if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1133                 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
1134
1135         if (link)
1136                 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags;
1137
1138         return offset;
1139 }
1140
1141 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb,
1142                                                const u16 *outer,
1143                                                const u16 *inner)
1144 {
1145         unsigned int skb_len = skb->len;
1146         bool at_extension = false;
1147         bool added = false;
1148         int i, j;
1149         u8 *len, *list_len = NULL;
1150
1151         skb_put_u8(skb, WLAN_EID_EXTENSION);
1152         len = skb_put(skb, 1);
1153         skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE);
1154
1155         for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
1156                 u16 elem = outer[i];
1157                 bool have_inner = false;
1158
1159                 /* should at least be sorted in the sense of normal -> ext */
1160                 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS);
1161
1162                 /* switch to extension list */
1163                 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) {
1164                         at_extension = true;
1165                         if (!list_len)
1166                                 skb_put_u8(skb, 0);
1167                         list_len = NULL;
1168                 }
1169
1170                 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) {
1171                         if (elem == inner[j]) {
1172                                 have_inner = true;
1173                                 break;
1174                         }
1175                 }
1176
1177                 if (have_inner)
1178                         continue;
1179
1180                 if (!list_len) {
1181                         list_len = skb_put(skb, 1);
1182                         *list_len = 0;
1183                 }
1184                 *list_len += 1;
1185                 skb_put_u8(skb, (u8)elem);
1186                 added = true;
1187         }
1188
1189         /* if we added a list but no extension list, make a zero-len one */
1190         if (added && (!at_extension || !list_len))
1191                 skb_put_u8(skb, 0);
1192
1193         /* if nothing added remove extension element completely */
1194         if (!added)
1195                 skb_trim(skb, skb_len);
1196         else
1197                 *len = skb->len - skb_len - 2;
1198 }
1199
1200 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1201                                         struct sk_buff *skb, u16 capab,
1202                                         const struct element *ext_capa,
1203                                         const u16 *outer_present_elems)
1204 {
1205         struct ieee80211_local *local = sdata->local;
1206         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1207         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1208         struct ieee80211_multi_link_elem *ml_elem;
1209         struct ieee80211_mle_basic_common_info *common;
1210         const struct wiphy_iftype_ext_capab *ift_ext_capa;
1211         __le16 eml_capa = 0, mld_capa_ops = 0;
1212         unsigned int link_id;
1213         u8 *ml_elem_len;
1214         void *capab_pos;
1215
1216         if (!sdata->vif.valid_links)
1217                 return;
1218
1219         ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy,
1220                                                     ieee80211_vif_type_p2p(&sdata->vif));
1221         if (ift_ext_capa) {
1222                 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
1223                 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
1224         }
1225
1226         skb_put_u8(skb, WLAN_EID_EXTENSION);
1227         ml_elem_len = skb_put(skb, 1);
1228         skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
1229         ml_elem = skb_put(skb, sizeof(*ml_elem));
1230         ml_elem->control =
1231                 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
1232                             IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
1233         common = skb_put(skb, sizeof(*common));
1234         common->len = sizeof(*common) +
1235                       2;  /* MLD capa/ops */
1236         memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1237
1238         /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */
1239         if (eml_capa &
1240             cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP |
1241                          IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
1242                 common->len += 2; /* EML capabilities */
1243                 ml_elem->control |=
1244                         cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
1245                 skb_put_data(skb, &eml_capa, sizeof(eml_capa));
1246         }
1247         /* need indication from userspace to support this */
1248         mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP);
1249         skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops));
1250
1251         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1252                 u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
1253                 const u8 *extra_elems;
1254                 size_t extra_elems_len;
1255                 size_t extra_used;
1256                 u8 *subelem_len = NULL;
1257                 __le16 ctrl;
1258
1259                 if (!assoc_data->link[link_id].bss ||
1260                     link_id == assoc_data->assoc_link_id)
1261                         continue;
1262
1263                 extra_elems = assoc_data->link[link_id].elems;
1264                 extra_elems_len = assoc_data->link[link_id].elems_len;
1265
1266                 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
1267                 subelem_len = skb_put(skb, 1);
1268
1269                 ctrl = cpu_to_le16(link_id |
1270                                    IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
1271                                    IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
1272                 skb_put_data(skb, &ctrl, sizeof(ctrl));
1273                 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */
1274                 skb_put_data(skb, assoc_data->link[link_id].addr,
1275                              ETH_ALEN);
1276                 /*
1277                  * Now add the contents of the (re)association request,
1278                  * but the "listen interval" and "current AP address"
1279                  * (if applicable) are skipped. So we only have
1280                  * the capability field (remember the position and fill
1281                  * later), followed by the elements added below by
1282                  * calling ieee80211_assoc_link_elems().
1283                  */
1284                 capab_pos = skb_put(skb, 2);
1285
1286                 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab,
1287                                                         ext_capa,
1288                                                         extra_elems,
1289                                                         extra_elems_len,
1290                                                         link_id, NULL,
1291                                                         link_present_elems);
1292                 if (extra_elems)
1293                         skb_put_data(skb, extra_elems + extra_used,
1294                                      extra_elems_len - extra_used);
1295
1296                 put_unaligned_le16(capab, capab_pos);
1297
1298                 ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
1299                                                    link_present_elems);
1300
1301                 ieee80211_fragment_element(skb, subelem_len);
1302         }
1303
1304         ieee80211_fragment_element(skb, ml_elem_len);
1305 }
1306
1307 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
1308 {
1309         struct ieee80211_local *local = sdata->local;
1310         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1311         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1312         struct ieee80211_link_data *link;
1313         struct sk_buff *skb;
1314         struct ieee80211_mgmt *mgmt;
1315         u8 *pos, qos_info, *ie_start;
1316         size_t offset, noffset;
1317         u16 capab = WLAN_CAPABILITY_ESS, link_capab;
1318         __le16 listen_int;
1319         struct element *ext_capa = NULL;
1320         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1321         struct ieee80211_prep_tx_info info = {};
1322         unsigned int link_id, n_links = 0;
1323         u16 present_elems[PRESENT_ELEMS_MAX] = {};
1324         void *capab_pos;
1325         size_t size;
1326         int ret;
1327
1328         /* we know it's writable, cast away the const */
1329         if (assoc_data->ie_len)
1330                 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
1331                                                       assoc_data->ie,
1332                                                       assoc_data->ie_len);
1333
1334         sdata_assert_lock(sdata);
1335
1336         size = local->hw.extra_tx_headroom +
1337                sizeof(*mgmt) + /* bit too much but doesn't matter */
1338                2 + assoc_data->ssid_len + /* SSID */
1339                assoc_data->ie_len + /* extra IEs */
1340                (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
1341                9; /* WMM */
1342
1343         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1344                 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1345                 const struct ieee80211_sband_iftype_data *iftd;
1346                 struct ieee80211_supported_band *sband;
1347
1348                 if (!cbss)
1349                         continue;
1350
1351                 sband = local->hw.wiphy->bands[cbss->channel->band];
1352
1353                 n_links++;
1354                 /* add STA profile elements length */
1355                 size += assoc_data->link[link_id].elems_len;
1356                 /* and supported rates length */
1357                 size += 4 + sband->n_bitrates;
1358                 /* supported channels */
1359                 size += 2 + 2 * sband->n_channels;
1360
1361                 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1362                 if (iftd)
1363                         size += iftd->vendor_elems.len;
1364
1365                 /* power capability */
1366                 size += 4;
1367
1368                 /* HT, VHT, HE, EHT */
1369                 size += 2 + sizeof(struct ieee80211_ht_cap);
1370                 size += 2 + sizeof(struct ieee80211_vht_cap);
1371                 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
1372                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1373                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1374
1375                 if (sband->band == NL80211_BAND_6GHZ)
1376                         size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa);
1377
1378                 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
1379                         sizeof(struct ieee80211_eht_mcs_nss_supp) +
1380                         IEEE80211_EHT_PPE_THRES_MAX_LEN;
1381
1382                 /* non-inheritance element */
1383                 size += 2 + 2 + PRESENT_ELEMS_MAX;
1384
1385                 /* should be the same across all BSSes */
1386                 if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
1387                         capab |= WLAN_CAPABILITY_PRIVACY;
1388         }
1389
1390         if (sdata->vif.valid_links) {
1391                 /* consider the multi-link element with STA profile */
1392                 size += sizeof(struct ieee80211_multi_link_elem);
1393                 /* max common info field in basic multi-link element */
1394                 size += sizeof(struct ieee80211_mle_basic_common_info) +
1395                         2 + /* capa & op */
1396                         2; /* EML capa */
1397
1398                 /*
1399                  * The capability elements were already considered above;
1400                  * note this over-estimates a bit because there's no
1401                  * STA profile for the assoc link.
1402                  */
1403                 size += (n_links - 1) *
1404                         (1 + 1 + /* subelement ID/length */
1405                          2 + /* STA control */
1406                          1 + ETH_ALEN + 2 /* STA Info field */);
1407         }
1408
1409         link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
1410         if (WARN_ON(!link))
1411                 return -EINVAL;
1412
1413         if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
1414                 return -EINVAL;
1415
1416         skb = alloc_skb(size, GFP_KERNEL);
1417         if (!skb)
1418                 return -ENOMEM;
1419
1420         skb_reserve(skb, local->hw.extra_tx_headroom);
1421
1422         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
1423                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
1424
1425         /* Set MBSSID support for HE AP if needed */
1426         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
1427             !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
1428             ext_capa && ext_capa->datalen >= 3)
1429                 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1430
1431         mgmt = skb_put_zero(skb, 24);
1432         memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
1433         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1434         memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
1435
1436         listen_int = cpu_to_le16(assoc_data->s1g ?
1437                         ieee80211_encode_usf(local->hw.conf.listen_interval) :
1438                         local->hw.conf.listen_interval);
1439         if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) {
1440                 skb_put(skb, 10);
1441                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1442                                                   IEEE80211_STYPE_REASSOC_REQ);
1443                 capab_pos = &mgmt->u.reassoc_req.capab_info;
1444                 mgmt->u.reassoc_req.listen_interval = listen_int;
1445                 memcpy(mgmt->u.reassoc_req.current_ap,
1446                        assoc_data->prev_ap_addr, ETH_ALEN);
1447                 info.subtype = IEEE80211_STYPE_REASSOC_REQ;
1448         } else {
1449                 skb_put(skb, 4);
1450                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1451                                                   IEEE80211_STYPE_ASSOC_REQ);
1452                 capab_pos = &mgmt->u.assoc_req.capab_info;
1453                 mgmt->u.assoc_req.listen_interval = listen_int;
1454                 info.subtype = IEEE80211_STYPE_ASSOC_REQ;
1455         }
1456
1457         /* SSID */
1458         pos = skb_put(skb, 2 + assoc_data->ssid_len);
1459         ie_start = pos;
1460         *pos++ = WLAN_EID_SSID;
1461         *pos++ = assoc_data->ssid_len;
1462         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
1463
1464         /* add the elements for the assoc (main) link */
1465         link_capab = capab;
1466         offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
1467                                             ext_capa,
1468                                             assoc_data->ie,
1469                                             assoc_data->ie_len,
1470                                             assoc_data->assoc_link_id, link,
1471                                             present_elems);
1472         put_unaligned_le16(link_capab, capab_pos);
1473
1474         /* if present, add any custom non-vendor IEs */
1475         if (assoc_data->ie_len) {
1476                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1477                                                     assoc_data->ie_len,
1478                                                     offset);
1479                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1480                 offset = noffset;
1481         }
1482
1483         if (assoc_data->wmm) {
1484                 if (assoc_data->uapsd) {
1485                         qos_info = ifmgd->uapsd_queues;
1486                         qos_info |= (ifmgd->uapsd_max_sp_len <<
1487                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1488                 } else {
1489                         qos_info = 0;
1490                 }
1491
1492                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1493         }
1494
1495         /* add any remaining custom (i.e. vendor specific here) IEs */
1496         if (assoc_data->ie_len) {
1497                 noffset = assoc_data->ie_len;
1498                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1499         }
1500
1501         if (assoc_data->fils_kek_len) {
1502                 ret = fils_encrypt_assoc_req(skb, assoc_data);
1503                 if (ret < 0) {
1504                         dev_kfree_skb(skb);
1505                         return ret;
1506                 }
1507         }
1508
1509         pos = skb_tail_pointer(skb);
1510         kfree(ifmgd->assoc_req_ies);
1511         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1512         if (!ifmgd->assoc_req_ies) {
1513                 dev_kfree_skb(skb);
1514                 return -ENOMEM;
1515         }
1516
1517         ifmgd->assoc_req_ies_len = pos - ie_start;
1518
1519         drv_mgd_prepare_tx(local, sdata, &info);
1520
1521         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1522         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1523                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1524                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
1525         ieee80211_tx_skb(sdata, skb);
1526
1527         return 0;
1528 }
1529
1530 void ieee80211_send_pspoll(struct ieee80211_local *local,
1531                            struct ieee80211_sub_if_data *sdata)
1532 {
1533         struct ieee80211_pspoll *pspoll;
1534         struct sk_buff *skb;
1535
1536         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1537         if (!skb)
1538                 return;
1539
1540         pspoll = (struct ieee80211_pspoll *) skb->data;
1541         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1542
1543         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1544         ieee80211_tx_skb(sdata, skb);
1545 }
1546
1547 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1548                              struct ieee80211_sub_if_data *sdata,
1549                              bool powersave)
1550 {
1551         struct sk_buff *skb;
1552         struct ieee80211_hdr_3addr *nullfunc;
1553         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1554
1555         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1,
1556                                      !ieee80211_hw_check(&local->hw,
1557                                                          DOESNT_SUPPORT_QOS_NDP));
1558         if (!skb)
1559                 return;
1560
1561         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1562         if (powersave)
1563                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1564
1565         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1566                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1567
1568         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1569                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1570
1571         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1572                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1573
1574         ieee80211_tx_skb(sdata, skb);
1575 }
1576
1577 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1578                                    struct ieee80211_sub_if_data *sdata)
1579 {
1580         struct sk_buff *skb;
1581         struct ieee80211_hdr *nullfunc;
1582         __le16 fc;
1583
1584         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1585                 return;
1586
1587         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1588         if (!skb)
1589                 return;
1590
1591         skb_reserve(skb, local->hw.extra_tx_headroom);
1592
1593         nullfunc = skb_put_zero(skb, 30);
1594         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1595                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1596         nullfunc->frame_control = fc;
1597         memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1598         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1599         memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1600         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1601
1602         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1603         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1604         ieee80211_tx_skb(sdata, skb);
1605 }
1606
1607 /* spectrum management related things */
1608 static void ieee80211_chswitch_work(struct work_struct *work)
1609 {
1610         struct ieee80211_link_data *link =
1611                 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work);
1612         struct ieee80211_sub_if_data *sdata = link->sdata;
1613         struct ieee80211_local *local = sdata->local;
1614         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1615         int ret;
1616
1617         if (!ieee80211_sdata_running(sdata))
1618                 return;
1619
1620         sdata_lock(sdata);
1621         mutex_lock(&local->mtx);
1622         mutex_lock(&local->chanctx_mtx);
1623
1624         if (!ifmgd->associated)
1625                 goto out;
1626
1627         if (!link->conf->csa_active)
1628                 goto out;
1629
1630         /*
1631          * using reservation isn't immediate as it may be deferred until later
1632          * with multi-vif. once reservation is complete it will re-schedule the
1633          * work with no reserved_chanctx so verify chandef to check if it
1634          * completed successfully
1635          */
1636
1637         if (link->reserved_chanctx) {
1638                 /*
1639                  * with multi-vif csa driver may call ieee80211_csa_finish()
1640                  * many times while waiting for other interfaces to use their
1641                  * reservations
1642                  */
1643                 if (link->reserved_ready)
1644                         goto out;
1645
1646                 ret = ieee80211_link_use_reserved_context(link);
1647                 if (ret) {
1648                         sdata_info(sdata,
1649                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1650                                    ret);
1651                         ieee80211_queue_work(&sdata->local->hw,
1652                                              &ifmgd->csa_connection_drop_work);
1653                         goto out;
1654                 }
1655
1656                 goto out;
1657         }
1658
1659         if (!cfg80211_chandef_identical(&link->conf->chandef,
1660                                         &link->csa_chandef)) {
1661                 sdata_info(sdata,
1662                            "failed to finalize channel switch, disconnecting\n");
1663                 ieee80211_queue_work(&sdata->local->hw,
1664                                      &ifmgd->csa_connection_drop_work);
1665                 goto out;
1666         }
1667
1668         link->u.mgd.csa_waiting_bcn = true;
1669
1670         ieee80211_sta_reset_beacon_monitor(sdata);
1671         ieee80211_sta_reset_conn_monitor(sdata);
1672
1673 out:
1674         mutex_unlock(&local->chanctx_mtx);
1675         mutex_unlock(&local->mtx);
1676         sdata_unlock(sdata);
1677 }
1678
1679 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
1680 {
1681         struct ieee80211_sub_if_data *sdata = link->sdata;
1682         struct ieee80211_local *local = sdata->local;
1683         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1684         int ret;
1685
1686         sdata_assert_lock(sdata);
1687
1688         WARN_ON(!link->conf->csa_active);
1689
1690         if (link->csa_block_tx) {
1691                 ieee80211_wake_vif_queues(local, sdata,
1692                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1693                 link->csa_block_tx = false;
1694         }
1695
1696         link->conf->csa_active = false;
1697         link->u.mgd.csa_waiting_bcn = false;
1698         /*
1699          * If the CSA IE is still present on the beacon after the switch,
1700          * we need to consider it as a new CSA (possibly to self).
1701          */
1702         link->u.mgd.beacon_crc_valid = false;
1703
1704         ret = drv_post_channel_switch(sdata);
1705         if (ret) {
1706                 sdata_info(sdata,
1707                            "driver post channel switch failed, disconnecting\n");
1708                 ieee80211_queue_work(&local->hw,
1709                                      &ifmgd->csa_connection_drop_work);
1710                 return;
1711         }
1712
1713         cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0);
1714 }
1715
1716 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1717 {
1718         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1719         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1720
1721         if (WARN_ON(sdata->vif.valid_links))
1722                 success = false;
1723
1724         trace_api_chswitch_done(sdata, success);
1725         if (!success) {
1726                 sdata_info(sdata,
1727                            "driver channel switch failed, disconnecting\n");
1728                 ieee80211_queue_work(&sdata->local->hw,
1729                                      &ifmgd->csa_connection_drop_work);
1730         } else {
1731                 ieee80211_queue_work(&sdata->local->hw,
1732                                      &sdata->deflink.u.mgd.chswitch_work);
1733         }
1734 }
1735 EXPORT_SYMBOL(ieee80211_chswitch_done);
1736
1737 static void ieee80211_chswitch_timer(struct timer_list *t)
1738 {
1739         struct ieee80211_link_data *link =
1740                 from_timer(link, t, u.mgd.chswitch_timer);
1741
1742         ieee80211_queue_work(&link->sdata->local->hw,
1743                              &link->u.mgd.chswitch_work);
1744 }
1745
1746 static void
1747 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
1748 {
1749         struct ieee80211_sub_if_data *sdata = link->sdata;
1750         struct ieee80211_local *local = sdata->local;
1751
1752         if (!local->ops->abort_channel_switch)
1753                 return;
1754
1755         mutex_lock(&local->mtx);
1756
1757         mutex_lock(&local->chanctx_mtx);
1758         ieee80211_link_unreserve_chanctx(link);
1759         mutex_unlock(&local->chanctx_mtx);
1760
1761         if (link->csa_block_tx)
1762                 ieee80211_wake_vif_queues(local, sdata,
1763                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1764
1765         link->csa_block_tx = false;
1766         link->conf->csa_active = false;
1767
1768         mutex_unlock(&local->mtx);
1769
1770         drv_abort_channel_switch(sdata);
1771 }
1772
1773 static void
1774 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
1775                                  u64 timestamp, u32 device_timestamp,
1776                                  struct ieee802_11_elems *elems,
1777                                  bool beacon)
1778 {
1779         struct ieee80211_sub_if_data *sdata = link->sdata;
1780         struct ieee80211_local *local = sdata->local;
1781         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1782         struct cfg80211_bss *cbss = link->u.mgd.bss;
1783         struct ieee80211_chanctx_conf *conf;
1784         struct ieee80211_chanctx *chanctx;
1785         enum nl80211_band current_band;
1786         struct ieee80211_csa_ie csa_ie;
1787         struct ieee80211_channel_switch ch_switch;
1788         struct ieee80211_bss *bss;
1789         int res;
1790
1791         sdata_assert_lock(sdata);
1792
1793         if (!cbss)
1794                 return;
1795
1796         if (local->scanning)
1797                 return;
1798
1799         current_band = cbss->channel->band;
1800         bss = (void *)cbss->priv;
1801         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1802                                            bss->vht_cap_info,
1803                                            link->u.mgd.conn_flags,
1804                                            link->u.mgd.bssid, &csa_ie);
1805
1806         if (!res) {
1807                 ch_switch.timestamp = timestamp;
1808                 ch_switch.device_timestamp = device_timestamp;
1809                 ch_switch.block_tx = csa_ie.mode;
1810                 ch_switch.chandef = csa_ie.chandef;
1811                 ch_switch.count = csa_ie.count;
1812                 ch_switch.delay = csa_ie.max_switch_time;
1813         }
1814
1815         if (res < 0)
1816                 goto lock_and_drop_connection;
1817
1818         if (beacon && link->conf->csa_active &&
1819             !link->u.mgd.csa_waiting_bcn) {
1820                 if (res)
1821                         ieee80211_sta_abort_chanswitch(link);
1822                 else
1823                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1824                 return;
1825         } else if (link->conf->csa_active || res) {
1826                 /* disregard subsequent announcements if already processing */
1827                 return;
1828         }
1829
1830         if (link->conf->chandef.chan->band !=
1831             csa_ie.chandef.chan->band) {
1832                 sdata_info(sdata,
1833                            "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1834                            link->u.mgd.bssid,
1835                            csa_ie.chandef.chan->center_freq,
1836                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1837                            csa_ie.chandef.center_freq2);
1838                 goto lock_and_drop_connection;
1839         }
1840
1841         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1842                                      IEEE80211_CHAN_DISABLED)) {
1843                 sdata_info(sdata,
1844                            "AP %pM switches to unsupported channel "
1845                            "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1846                            "disconnecting\n",
1847                            link->u.mgd.bssid,
1848                            csa_ie.chandef.chan->center_freq,
1849                            csa_ie.chandef.chan->freq_offset,
1850                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1851                            csa_ie.chandef.freq1_offset,
1852                            csa_ie.chandef.center_freq2);
1853                 goto lock_and_drop_connection;
1854         }
1855
1856         if (cfg80211_chandef_identical(&csa_ie.chandef,
1857                                        &link->conf->chandef) &&
1858             (!csa_ie.mode || !beacon)) {
1859                 if (link->u.mgd.csa_ignored_same_chan)
1860                         return;
1861                 sdata_info(sdata,
1862                            "AP %pM tries to chanswitch to same channel, ignore\n",
1863                            link->u.mgd.bssid);
1864                 link->u.mgd.csa_ignored_same_chan = true;
1865                 return;
1866         }
1867
1868         /*
1869          * Drop all TDLS peers - either we disconnect or move to a different
1870          * channel from this point on. There's no telling what our peer will do.
1871          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1872          * have an incompatible wider chandef.
1873          */
1874         ieee80211_teardown_tdls_peers(sdata);
1875
1876         mutex_lock(&local->mtx);
1877         mutex_lock(&local->chanctx_mtx);
1878         conf = rcu_dereference_protected(link->conf->chanctx_conf,
1879                                          lockdep_is_held(&local->chanctx_mtx));
1880         if (!conf) {
1881                 sdata_info(sdata,
1882                            "no channel context assigned to vif?, disconnecting\n");
1883                 goto drop_connection;
1884         }
1885
1886         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1887
1888         if (local->use_chanctx &&
1889             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1890                 sdata_info(sdata,
1891                            "driver doesn't support chan-switch with channel contexts\n");
1892                 goto drop_connection;
1893         }
1894
1895         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1896                 sdata_info(sdata,
1897                            "preparing for channel switch failed, disconnecting\n");
1898                 goto drop_connection;
1899         }
1900
1901         res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef,
1902                                              chanctx->mode, false);
1903         if (res) {
1904                 sdata_info(sdata,
1905                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1906                            res);
1907                 goto drop_connection;
1908         }
1909         mutex_unlock(&local->chanctx_mtx);
1910
1911         link->conf->csa_active = true;
1912         link->csa_chandef = csa_ie.chandef;
1913         link->csa_block_tx = csa_ie.mode;
1914         link->u.mgd.csa_ignored_same_chan = false;
1915         link->u.mgd.beacon_crc_valid = false;
1916
1917         if (link->csa_block_tx)
1918                 ieee80211_stop_vif_queues(local, sdata,
1919                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1920         mutex_unlock(&local->mtx);
1921
1922         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0,
1923                                           csa_ie.count, csa_ie.mode);
1924
1925         if (local->ops->channel_switch) {
1926                 /* use driver's channel switch callback */
1927                 drv_channel_switch(local, sdata, &ch_switch);
1928                 return;
1929         }
1930
1931         /* channel switch handled in software */
1932         if (csa_ie.count <= 1)
1933                 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work);
1934         else
1935                 mod_timer(&link->u.mgd.chswitch_timer,
1936                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1937                                          cbss->beacon_interval));
1938         return;
1939  lock_and_drop_connection:
1940         mutex_lock(&local->mtx);
1941         mutex_lock(&local->chanctx_mtx);
1942  drop_connection:
1943         /*
1944          * This is just so that the disconnect flow will know that
1945          * we were trying to switch channel and failed. In case the
1946          * mode is 1 (we are not allowed to Tx), we will know not to
1947          * send a deauthentication frame. Those two fields will be
1948          * reset when the disconnection worker runs.
1949          */
1950         link->conf->csa_active = true;
1951         link->csa_block_tx = csa_ie.mode;
1952
1953         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1954         mutex_unlock(&local->chanctx_mtx);
1955         mutex_unlock(&local->mtx);
1956 }
1957
1958 static bool
1959 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1960                                  struct ieee80211_channel *channel,
1961                                  const u8 *country_ie, u8 country_ie_len,
1962                                  const u8 *pwr_constr_elem,
1963                                  int *chan_pwr, int *pwr_reduction)
1964 {
1965         struct ieee80211_country_ie_triplet *triplet;
1966         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1967         int i, chan_increment;
1968         bool have_chan_pwr = false;
1969
1970         /* Invalid IE */
1971         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1972                 return false;
1973
1974         triplet = (void *)(country_ie + 3);
1975         country_ie_len -= 3;
1976
1977         switch (channel->band) {
1978         default:
1979                 WARN_ON_ONCE(1);
1980                 fallthrough;
1981         case NL80211_BAND_2GHZ:
1982         case NL80211_BAND_60GHZ:
1983         case NL80211_BAND_LC:
1984                 chan_increment = 1;
1985                 break;
1986         case NL80211_BAND_5GHZ:
1987                 chan_increment = 4;
1988                 break;
1989         case NL80211_BAND_6GHZ:
1990                 /*
1991                  * In the 6 GHz band, the "maximum transmit power level"
1992                  * field in the triplets is reserved, and thus will be
1993                  * zero and we shouldn't use it to control TX power.
1994                  * The actual TX power will be given in the transmit
1995                  * power envelope element instead.
1996                  */
1997                 return false;
1998         }
1999
2000         /* find channel */
2001         while (country_ie_len >= 3) {
2002                 u8 first_channel = triplet->chans.first_channel;
2003
2004                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
2005                         goto next;
2006
2007                 for (i = 0; i < triplet->chans.num_channels; i++) {
2008                         if (first_channel + i * chan_increment == chan) {
2009                                 have_chan_pwr = true;
2010                                 *chan_pwr = triplet->chans.max_power;
2011                                 break;
2012                         }
2013                 }
2014                 if (have_chan_pwr)
2015                         break;
2016
2017  next:
2018                 triplet++;
2019                 country_ie_len -= 3;
2020         }
2021
2022         if (have_chan_pwr && pwr_constr_elem)
2023                 *pwr_reduction = *pwr_constr_elem;
2024         else
2025                 *pwr_reduction = 0;
2026
2027         return have_chan_pwr;
2028 }
2029
2030 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
2031                                       struct ieee80211_channel *channel,
2032                                       const u8 *cisco_dtpc_ie,
2033                                       int *pwr_level)
2034 {
2035         /* From practical testing, the first data byte of the DTPC element
2036          * seems to contain the requested dBm level, and the CLI on Cisco
2037          * APs clearly state the range is -127 to 127 dBm, which indicates
2038          * a signed byte, although it seemingly never actually goes negative.
2039          * The other byte seems to always be zero.
2040          */
2041         *pwr_level = (__s8)cisco_dtpc_ie[4];
2042 }
2043
2044 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
2045                                        struct ieee80211_channel *channel,
2046                                        struct ieee80211_mgmt *mgmt,
2047                                        const u8 *country_ie, u8 country_ie_len,
2048                                        const u8 *pwr_constr_ie,
2049                                        const u8 *cisco_dtpc_ie)
2050 {
2051         struct ieee80211_sub_if_data *sdata = link->sdata;
2052         bool has_80211h_pwr = false, has_cisco_pwr = false;
2053         int chan_pwr = 0, pwr_reduction_80211h = 0;
2054         int pwr_level_cisco, pwr_level_80211h;
2055         int new_ap_level;
2056         __le16 capab = mgmt->u.probe_resp.capab_info;
2057
2058         if (ieee80211_is_s1g_beacon(mgmt->frame_control))
2059                 return 0;       /* TODO */
2060
2061         if (country_ie &&
2062             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
2063              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
2064                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
2065                         sdata, channel, country_ie, country_ie_len,
2066                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
2067                 pwr_level_80211h =
2068                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
2069         }
2070
2071         if (cisco_dtpc_ie) {
2072                 ieee80211_find_cisco_dtpc(
2073                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
2074                 has_cisco_pwr = true;
2075         }
2076
2077         if (!has_80211h_pwr && !has_cisco_pwr)
2078                 return 0;
2079
2080         /* If we have both 802.11h and Cisco DTPC, apply both limits
2081          * by picking the smallest of the two power levels advertised.
2082          */
2083         if (has_80211h_pwr &&
2084             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
2085                 new_ap_level = pwr_level_80211h;
2086
2087                 if (link->ap_power_level == new_ap_level)
2088                         return 0;
2089
2090                 sdata_dbg(sdata,
2091                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
2092                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
2093                           link->u.mgd.bssid);
2094         } else {  /* has_cisco_pwr is always true here. */
2095                 new_ap_level = pwr_level_cisco;
2096
2097                 if (link->ap_power_level == new_ap_level)
2098                         return 0;
2099
2100                 sdata_dbg(sdata,
2101                           "Limiting TX power to %d dBm as advertised by %pM\n",
2102                           pwr_level_cisco, link->u.mgd.bssid);
2103         }
2104
2105         link->ap_power_level = new_ap_level;
2106         if (__ieee80211_recalc_txpower(sdata))
2107                 return BSS_CHANGED_TXPOWER;
2108         return 0;
2109 }
2110
2111 /* powersave */
2112 static void ieee80211_enable_ps(struct ieee80211_local *local,
2113                                 struct ieee80211_sub_if_data *sdata)
2114 {
2115         struct ieee80211_conf *conf = &local->hw.conf;
2116
2117         /*
2118          * If we are scanning right now then the parameters will
2119          * take effect when scan finishes.
2120          */
2121         if (local->scanning)
2122                 return;
2123
2124         if (conf->dynamic_ps_timeout > 0 &&
2125             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2126                 mod_timer(&local->dynamic_ps_timer, jiffies +
2127                           msecs_to_jiffies(conf->dynamic_ps_timeout));
2128         } else {
2129                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
2130                         ieee80211_send_nullfunc(local, sdata, true);
2131
2132                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2133                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2134                         return;
2135
2136                 conf->flags |= IEEE80211_CONF_PS;
2137                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2138         }
2139 }
2140
2141 static void ieee80211_change_ps(struct ieee80211_local *local)
2142 {
2143         struct ieee80211_conf *conf = &local->hw.conf;
2144
2145         if (local->ps_sdata) {
2146                 ieee80211_enable_ps(local, local->ps_sdata);
2147         } else if (conf->flags & IEEE80211_CONF_PS) {
2148                 conf->flags &= ~IEEE80211_CONF_PS;
2149                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2150                 del_timer_sync(&local->dynamic_ps_timer);
2151                 cancel_work_sync(&local->dynamic_ps_enable_work);
2152         }
2153 }
2154
2155 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
2156 {
2157         struct ieee80211_local *local = sdata->local;
2158         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
2159         struct sta_info *sta = NULL;
2160         bool authorized = false;
2161
2162         if (!mgd->powersave)
2163                 return false;
2164
2165         if (mgd->broken_ap)
2166                 return false;
2167
2168         if (!mgd->associated)
2169                 return false;
2170
2171         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
2172                 return false;
2173
2174         if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
2175             !sdata->deflink.u.mgd.have_beacon)
2176                 return false;
2177
2178         rcu_read_lock();
2179         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
2180         if (sta)
2181                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2182         rcu_read_unlock();
2183
2184         return authorized;
2185 }
2186
2187 /* need to hold RTNL or interface lock */
2188 void ieee80211_recalc_ps(struct ieee80211_local *local)
2189 {
2190         struct ieee80211_sub_if_data *sdata, *found = NULL;
2191         int count = 0;
2192         int timeout;
2193
2194         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) ||
2195             ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2196                 local->ps_sdata = NULL;
2197                 return;
2198         }
2199
2200         list_for_each_entry(sdata, &local->interfaces, list) {
2201                 if (!ieee80211_sdata_running(sdata))
2202                         continue;
2203                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2204                         /* If an AP vif is found, then disable PS
2205                          * by setting the count to zero thereby setting
2206                          * ps_sdata to NULL.
2207                          */
2208                         count = 0;
2209                         break;
2210                 }
2211                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2212                         continue;
2213                 found = sdata;
2214                 count++;
2215         }
2216
2217         if (count == 1 && ieee80211_powersave_allowed(found)) {
2218                 u8 dtimper = found->deflink.u.mgd.dtim_period;
2219
2220                 timeout = local->dynamic_ps_forced_timeout;
2221                 if (timeout < 0)
2222                         timeout = 100;
2223                 local->hw.conf.dynamic_ps_timeout = timeout;
2224
2225                 /* If the TIM IE is invalid, pretend the value is 1 */
2226                 if (!dtimper)
2227                         dtimper = 1;
2228
2229                 local->hw.conf.ps_dtim_period = dtimper;
2230                 local->ps_sdata = found;
2231         } else {
2232                 local->ps_sdata = NULL;
2233         }
2234
2235         ieee80211_change_ps(local);
2236 }
2237
2238 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
2239 {
2240         bool ps_allowed = ieee80211_powersave_allowed(sdata);
2241
2242         if (sdata->vif.cfg.ps != ps_allowed) {
2243                 sdata->vif.cfg.ps = ps_allowed;
2244                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS);
2245         }
2246 }
2247
2248 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2249 {
2250         struct ieee80211_local *local =
2251                 container_of(work, struct ieee80211_local,
2252                              dynamic_ps_disable_work);
2253
2254         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2255                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2256                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2257         }
2258
2259         ieee80211_wake_queues_by_reason(&local->hw,
2260                                         IEEE80211_MAX_QUEUE_MAP,
2261                                         IEEE80211_QUEUE_STOP_REASON_PS,
2262                                         false);
2263 }
2264
2265 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2266 {
2267         struct ieee80211_local *local =
2268                 container_of(work, struct ieee80211_local,
2269                              dynamic_ps_enable_work);
2270         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
2271         struct ieee80211_if_managed *ifmgd;
2272         unsigned long flags;
2273         int q;
2274
2275         /* can only happen when PS was just disabled anyway */
2276         if (!sdata)
2277                 return;
2278
2279         ifmgd = &sdata->u.mgd;
2280
2281         if (local->hw.conf.flags & IEEE80211_CONF_PS)
2282                 return;
2283
2284         if (local->hw.conf.dynamic_ps_timeout > 0) {
2285                 /* don't enter PS if TX frames are pending */
2286                 if (drv_tx_frames_pending(local)) {
2287                         mod_timer(&local->dynamic_ps_timer, jiffies +
2288                                   msecs_to_jiffies(
2289                                   local->hw.conf.dynamic_ps_timeout));
2290                         return;
2291                 }
2292
2293                 /*
2294                  * transmission can be stopped by others which leads to
2295                  * dynamic_ps_timer expiry. Postpone the ps timer if it
2296                  * is not the actual idle state.
2297                  */
2298                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2299                 for (q = 0; q < local->hw.queues; q++) {
2300                         if (local->queue_stop_reasons[q]) {
2301                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2302                                                        flags);
2303                                 mod_timer(&local->dynamic_ps_timer, jiffies +
2304                                           msecs_to_jiffies(
2305                                           local->hw.conf.dynamic_ps_timeout));
2306                                 return;
2307                         }
2308                 }
2309                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2310         }
2311
2312         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2313             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2314                 if (drv_tx_frames_pending(local)) {
2315                         mod_timer(&local->dynamic_ps_timer, jiffies +
2316                                   msecs_to_jiffies(
2317                                   local->hw.conf.dynamic_ps_timeout));
2318                 } else {
2319                         ieee80211_send_nullfunc(local, sdata, true);
2320                         /* Flush to get the tx status of nullfunc frame */
2321                         ieee80211_flush_queues(local, sdata, false);
2322                 }
2323         }
2324
2325         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
2326               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
2327             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2328                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2329                 local->hw.conf.flags |= IEEE80211_CONF_PS;
2330                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2331         }
2332 }
2333
2334 void ieee80211_dynamic_ps_timer(struct timer_list *t)
2335 {
2336         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
2337
2338         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
2339 }
2340
2341 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
2342 {
2343         struct delayed_work *delayed_work = to_delayed_work(work);
2344         struct ieee80211_link_data *link =
2345                 container_of(delayed_work, struct ieee80211_link_data,
2346                              dfs_cac_timer_work);
2347         struct cfg80211_chan_def chandef = link->conf->chandef;
2348         struct ieee80211_sub_if_data *sdata = link->sdata;
2349
2350         mutex_lock(&sdata->local->mtx);
2351         if (sdata->wdev.cac_started) {
2352                 ieee80211_link_release_channel(link);
2353                 cfg80211_cac_event(sdata->dev, &chandef,
2354                                    NL80211_RADAR_CAC_FINISHED,
2355                                    GFP_KERNEL);
2356         }
2357         mutex_unlock(&sdata->local->mtx);
2358 }
2359
2360 static bool
2361 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2362 {
2363         struct ieee80211_local *local = sdata->local;
2364         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2365         bool ret = false;
2366         int ac;
2367
2368         if (local->hw.queues < IEEE80211_NUM_ACS)
2369                 return false;
2370
2371         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2372                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2373                 int non_acm_ac;
2374                 unsigned long now = jiffies;
2375
2376                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
2377                     tx_tspec->admitted_time &&
2378                     time_after(now, tx_tspec->time_slice_start + HZ)) {
2379                         tx_tspec->consumed_tx_time = 0;
2380                         tx_tspec->time_slice_start = now;
2381
2382                         if (tx_tspec->downgraded)
2383                                 tx_tspec->action =
2384                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
2385                 }
2386
2387                 switch (tx_tspec->action) {
2388                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
2389                         /* take the original parameters */
2390                         if (drv_conf_tx(local, &sdata->deflink, ac,
2391                                         &sdata->deflink.tx_conf[ac]))
2392                                 link_err(&sdata->deflink,
2393                                          "failed to set TX queue parameters for queue %d\n",
2394                                          ac);
2395                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
2396                         tx_tspec->downgraded = false;
2397                         ret = true;
2398                         break;
2399                 case TX_TSPEC_ACTION_DOWNGRADE:
2400                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2401                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2402                                 ret = true;
2403                                 break;
2404                         }
2405                         /* downgrade next lower non-ACM AC */
2406                         for (non_acm_ac = ac + 1;
2407                              non_acm_ac < IEEE80211_NUM_ACS;
2408                              non_acm_ac++)
2409                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
2410                                         break;
2411                         /* Usually the loop will result in using BK even if it
2412                          * requires admission control, but such a configuration
2413                          * makes no sense and we have to transmit somehow - the
2414                          * AC selection does the same thing.
2415                          * If we started out trying to downgrade from BK, then
2416                          * the extra condition here might be needed.
2417                          */
2418                         if (non_acm_ac >= IEEE80211_NUM_ACS)
2419                                 non_acm_ac = IEEE80211_AC_BK;
2420                         if (drv_conf_tx(local, &sdata->deflink, ac,
2421                                         &sdata->deflink.tx_conf[non_acm_ac]))
2422                                 link_err(&sdata->deflink,
2423                                          "failed to set TX queue parameters for queue %d\n",
2424                                          ac);
2425                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
2426                         ret = true;
2427                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
2428                                 tx_tspec->time_slice_start + HZ - now + 1);
2429                         break;
2430                 case TX_TSPEC_ACTION_NONE:
2431                         /* nothing now */
2432                         break;
2433                 }
2434         }
2435
2436         return ret;
2437 }
2438
2439 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2440 {
2441         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2442                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
2443                                                   BSS_CHANGED_QOS);
2444 }
2445
2446 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
2447 {
2448         struct ieee80211_sub_if_data *sdata;
2449
2450         sdata = container_of(work, struct ieee80211_sub_if_data,
2451                              u.mgd.tx_tspec_wk.work);
2452         ieee80211_sta_handle_tspec_ac_params(sdata);
2453 }
2454
2455 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
2456 {
2457         struct ieee80211_sub_if_data *sdata = link->sdata;
2458         struct ieee80211_local *local = sdata->local;
2459         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2460         struct ieee80211_tx_queue_params *params = link->tx_conf;
2461         u8 ac;
2462
2463         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2464                 mlme_dbg(sdata,
2465                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2466                          ac, params[ac].acm,
2467                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2468                          params[ac].txop, params[ac].uapsd,
2469                          ifmgd->tx_tspec[ac].downgraded);
2470                 if (!ifmgd->tx_tspec[ac].downgraded &&
2471                     drv_conf_tx(local, link, ac, &params[ac]))
2472                         link_err(link,
2473                                  "failed to set TX queue parameters for AC %d\n",
2474                                  ac);
2475         }
2476 }
2477
2478 /* MLME */
2479 static bool
2480 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2481                          struct ieee80211_link_data *link,
2482                          const u8 *wmm_param, size_t wmm_param_len,
2483                          const struct ieee80211_mu_edca_param_set *mu_edca)
2484 {
2485         struct ieee80211_sub_if_data *sdata = link->sdata;
2486         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2487         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2488         size_t left;
2489         int count, mu_edca_count, ac;
2490         const u8 *pos;
2491         u8 uapsd_queues = 0;
2492
2493         if (!local->ops->conf_tx)
2494                 return false;
2495
2496         if (local->hw.queues < IEEE80211_NUM_ACS)
2497                 return false;
2498
2499         if (!wmm_param)
2500                 return false;
2501
2502         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2503                 return false;
2504
2505         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2506                 uapsd_queues = ifmgd->uapsd_queues;
2507
2508         count = wmm_param[6] & 0x0f;
2509         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2510          * if mu_edca was preset before and now it disappeared tell
2511          * the driver about it.
2512          */
2513         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2514         if (count == link->u.mgd.wmm_last_param_set &&
2515             mu_edca_count == link->u.mgd.mu_edca_last_param_set)
2516                 return false;
2517         link->u.mgd.wmm_last_param_set = count;
2518         link->u.mgd.mu_edca_last_param_set = mu_edca_count;
2519
2520         pos = wmm_param + 8;
2521         left = wmm_param_len - 8;
2522
2523         memset(&params, 0, sizeof(params));
2524
2525         sdata->wmm_acm = 0;
2526         for (; left >= 4; left -= 4, pos += 4) {
2527                 int aci = (pos[0] >> 5) & 0x03;
2528                 int acm = (pos[0] >> 4) & 0x01;
2529                 bool uapsd = false;
2530
2531                 switch (aci) {
2532                 case 1: /* AC_BK */
2533                         ac = IEEE80211_AC_BK;
2534                         if (acm)
2535                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2536                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2537                                 uapsd = true;
2538                         params[ac].mu_edca = !!mu_edca;
2539                         if (mu_edca)
2540                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2541                         break;
2542                 case 2: /* AC_VI */
2543                         ac = IEEE80211_AC_VI;
2544                         if (acm)
2545                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2546                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2547                                 uapsd = true;
2548                         params[ac].mu_edca = !!mu_edca;
2549                         if (mu_edca)
2550                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2551                         break;
2552                 case 3: /* AC_VO */
2553                         ac = IEEE80211_AC_VO;
2554                         if (acm)
2555                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2556                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2557                                 uapsd = true;
2558                         params[ac].mu_edca = !!mu_edca;
2559                         if (mu_edca)
2560                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2561                         break;
2562                 case 0: /* AC_BE */
2563                 default:
2564                         ac = IEEE80211_AC_BE;
2565                         if (acm)
2566                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2567                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2568                                 uapsd = true;
2569                         params[ac].mu_edca = !!mu_edca;
2570                         if (mu_edca)
2571                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2572                         break;
2573                 }
2574
2575                 params[ac].aifs = pos[0] & 0x0f;
2576
2577                 if (params[ac].aifs < 2) {
2578                         sdata_info(sdata,
2579                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2580                                    params[ac].aifs, aci);
2581                         params[ac].aifs = 2;
2582                 }
2583                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2584                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2585                 params[ac].txop = get_unaligned_le16(pos + 2);
2586                 params[ac].acm = acm;
2587                 params[ac].uapsd = uapsd;
2588
2589                 if (params[ac].cw_min == 0 ||
2590                     params[ac].cw_min > params[ac].cw_max) {
2591                         sdata_info(sdata,
2592                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2593                                    params[ac].cw_min, params[ac].cw_max, aci);
2594                         return false;
2595                 }
2596                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2597         }
2598
2599         /* WMM specification requires all 4 ACIs. */
2600         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2601                 if (params[ac].cw_min == 0) {
2602                         sdata_info(sdata,
2603                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2604                                    ac);
2605                         return false;
2606                 }
2607         }
2608
2609         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2610                 link->tx_conf[ac] = params[ac];
2611
2612         ieee80211_mgd_set_link_qos_params(link);
2613
2614         /* enable WMM or activate new settings */
2615         link->conf->qos = true;
2616         return true;
2617 }
2618
2619 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2620 {
2621         lockdep_assert_held(&sdata->local->mtx);
2622
2623         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2624         ieee80211_run_deferred_scan(sdata->local);
2625 }
2626
2627 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2628 {
2629         mutex_lock(&sdata->local->mtx);
2630         __ieee80211_stop_poll(sdata);
2631         mutex_unlock(&sdata->local->mtx);
2632 }
2633
2634 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
2635                                            u16 capab, bool erp_valid, u8 erp)
2636 {
2637         struct ieee80211_bss_conf *bss_conf = link->conf;
2638         struct ieee80211_supported_band *sband;
2639         u32 changed = 0;
2640         bool use_protection;
2641         bool use_short_preamble;
2642         bool use_short_slot;
2643
2644         sband = ieee80211_get_link_sband(link);
2645         if (!sband)
2646                 return changed;
2647
2648         if (erp_valid) {
2649                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2650                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2651         } else {
2652                 use_protection = false;
2653                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2654         }
2655
2656         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2657         if (sband->band == NL80211_BAND_5GHZ ||
2658             sband->band == NL80211_BAND_6GHZ)
2659                 use_short_slot = true;
2660
2661         if (use_protection != bss_conf->use_cts_prot) {
2662                 bss_conf->use_cts_prot = use_protection;
2663                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2664         }
2665
2666         if (use_short_preamble != bss_conf->use_short_preamble) {
2667                 bss_conf->use_short_preamble = use_short_preamble;
2668                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2669         }
2670
2671         if (use_short_slot != bss_conf->use_short_slot) {
2672                 bss_conf->use_short_slot = use_short_slot;
2673                 changed |= BSS_CHANGED_ERP_SLOT;
2674         }
2675
2676         return changed;
2677 }
2678
2679 static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link,
2680                                          struct cfg80211_bss *cbss)
2681 {
2682         struct ieee80211_sub_if_data *sdata = link->sdata;
2683         struct ieee80211_bss_conf *bss_conf = link->conf;
2684         struct ieee80211_bss *bss = (void *)cbss->priv;
2685         u32 changed = BSS_CHANGED_QOS;
2686
2687         /* not really used in MLO */
2688         sdata->u.mgd.beacon_timeout =
2689                 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count *
2690                                                       bss_conf->beacon_int));
2691
2692         changed |= ieee80211_handle_bss_capability(link,
2693                                                    bss_conf->assoc_capability,
2694                                                    bss->has_erp_value,
2695                                                    bss->erp_value);
2696
2697         ieee80211_check_rate_mask(link);
2698
2699         link->u.mgd.bss = cbss;
2700         memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2701
2702         if (sdata->vif.p2p ||
2703             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2704                 const struct cfg80211_bss_ies *ies;
2705
2706                 rcu_read_lock();
2707                 ies = rcu_dereference(cbss->ies);
2708                 if (ies) {
2709                         int ret;
2710
2711                         ret = cfg80211_get_p2p_attr(
2712                                         ies->data, ies->len,
2713                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2714                                         (u8 *) &bss_conf->p2p_noa_attr,
2715                                         sizeof(bss_conf->p2p_noa_attr));
2716                         if (ret >= 2) {
2717                                 link->u.mgd.p2p_noa_index =
2718                                         bss_conf->p2p_noa_attr.index;
2719                                 changed |= BSS_CHANGED_P2P_PS;
2720                         }
2721                 }
2722                 rcu_read_unlock();
2723         }
2724
2725         if (link->u.mgd.have_beacon) {
2726                 /*
2727                  * If the AP is buggy we may get here with no DTIM period
2728                  * known, so assume it's 1 which is the only safe assumption
2729                  * in that case, although if the TIM IE is broken powersave
2730                  * probably just won't work at all.
2731                  */
2732                 bss_conf->dtim_period = link->u.mgd.dtim_period ?: 1;
2733                 bss_conf->beacon_rate = bss->beacon_rate;
2734                 changed |= BSS_CHANGED_BEACON_INFO;
2735         } else {
2736                 bss_conf->beacon_rate = NULL;
2737                 bss_conf->dtim_period = 0;
2738         }
2739
2740         /* Tell the driver to monitor connection quality (if supported) */
2741         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2742             bss_conf->cqm_rssi_thold)
2743                 changed |= BSS_CHANGED_CQM;
2744
2745         return changed;
2746 }
2747
2748 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2749                                      struct ieee80211_mgd_assoc_data *assoc_data,
2750                                      u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
2751 {
2752         struct ieee80211_local *local = sdata->local;
2753         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
2754         u64 vif_changed = BSS_CHANGED_ASSOC;
2755         unsigned int link_id;
2756
2757         sdata->u.mgd.associated = true;
2758
2759         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
2760                 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2761                 struct ieee80211_link_data *link;
2762
2763                 if (!cbss)
2764                         continue;
2765
2766                 link = sdata_dereference(sdata->link[link_id], sdata);
2767                 if (WARN_ON(!link))
2768                         return;
2769
2770                 changed[link_id] |= ieee80211_link_set_associated(link, cbss);
2771         }
2772
2773         /* just to be sure */
2774         ieee80211_stop_poll(sdata);
2775
2776         ieee80211_led_assoc(local, 1);
2777
2778         vif_cfg->assoc = 1;
2779
2780         /* Enable ARP filtering */
2781         if (vif_cfg->arp_addr_cnt)
2782                 vif_changed |= BSS_CHANGED_ARP_FILTER;
2783
2784         if (sdata->vif.valid_links) {
2785                 for (link_id = 0;
2786                      link_id < IEEE80211_MLD_MAX_NUM_LINKS;
2787                      link_id++) {
2788                         struct ieee80211_link_data *link;
2789                         struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2790
2791                         if (!cbss)
2792                                 continue;
2793
2794                         link = sdata_dereference(sdata->link[link_id], sdata);
2795                         if (WARN_ON(!link))
2796                                 return;
2797
2798                         ieee80211_link_info_change_notify(sdata, link,
2799                                                           changed[link_id]);
2800
2801                         ieee80211_recalc_smps(sdata, link);
2802                 }
2803
2804                 ieee80211_vif_cfg_change_notify(sdata, vif_changed);
2805         } else {
2806                 ieee80211_bss_info_change_notify(sdata,
2807                                                  vif_changed | changed[0]);
2808         }
2809
2810         mutex_lock(&local->iflist_mtx);
2811         ieee80211_recalc_ps(local);
2812         mutex_unlock(&local->iflist_mtx);
2813
2814         /* leave this here to not change ordering in non-MLO cases */
2815         if (!sdata->vif.valid_links)
2816                 ieee80211_recalc_smps(sdata, &sdata->deflink);
2817         ieee80211_recalc_ps_vif(sdata);
2818
2819         netif_carrier_on(sdata->dev);
2820 }
2821
2822 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2823                                    u16 stype, u16 reason, bool tx,
2824                                    u8 *frame_buf)
2825 {
2826         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2827         struct ieee80211_local *local = sdata->local;
2828         unsigned int link_id;
2829         u32 changed = 0;
2830         struct ieee80211_prep_tx_info info = {
2831                 .subtype = stype,
2832         };
2833
2834         sdata_assert_lock(sdata);
2835
2836         if (WARN_ON_ONCE(tx && !frame_buf))
2837                 return;
2838
2839         if (WARN_ON(!ifmgd->associated))
2840                 return;
2841
2842         ieee80211_stop_poll(sdata);
2843
2844         ifmgd->associated = false;
2845
2846         /* other links will be destroyed */
2847         sdata->deflink.u.mgd.bss = NULL;
2848
2849         netif_carrier_off(sdata->dev);
2850
2851         /*
2852          * if we want to get out of ps before disassoc (why?) we have
2853          * to do it before sending disassoc, as otherwise the null-packet
2854          * won't be valid.
2855          */
2856         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2857                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2858                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2859         }
2860         local->ps_sdata = NULL;
2861
2862         /* disable per-vif ps */
2863         ieee80211_recalc_ps_vif(sdata);
2864
2865         /* make sure ongoing transmission finishes */
2866         synchronize_net();
2867
2868         /*
2869          * drop any frame before deauth/disassoc, this can be data or
2870          * management frame. Since we are disconnecting, we should not
2871          * insist sending these frames which can take time and delay
2872          * the disconnection and possible the roaming.
2873          */
2874         if (tx)
2875                 ieee80211_flush_queues(local, sdata, true);
2876
2877         /* deauthenticate/disassociate now */
2878         if (tx || frame_buf) {
2879                 /*
2880                  * In multi channel scenarios guarantee that the virtual
2881                  * interface is granted immediate airtime to transmit the
2882                  * deauthentication frame by calling mgd_prepare_tx, if the
2883                  * driver requested so.
2884                  */
2885                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2886                     !sdata->deflink.u.mgd.have_beacon) {
2887                         drv_mgd_prepare_tx(sdata->local, sdata, &info);
2888                 }
2889
2890                 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr,
2891                                                sdata->vif.cfg.ap_addr, stype,
2892                                                reason, tx, frame_buf);
2893         }
2894
2895         /* flush out frame - make sure the deauth was actually sent */
2896         if (tx)
2897                 ieee80211_flush_queues(local, sdata, false);
2898
2899         drv_mgd_complete_tx(sdata->local, sdata, &info);
2900
2901         /* clear AP addr only after building the needed mgmt frames */
2902         eth_zero_addr(sdata->deflink.u.mgd.bssid);
2903         eth_zero_addr(sdata->vif.cfg.ap_addr);
2904
2905         sdata->vif.cfg.ssid_len = 0;
2906
2907         /* remove AP and TDLS peers */
2908         sta_info_flush(sdata);
2909
2910         /* finally reset all BSS / config parameters */
2911         if (!sdata->vif.valid_links)
2912                 changed |= ieee80211_reset_erp_info(sdata);
2913
2914         ieee80211_led_assoc(local, 0);
2915         changed |= BSS_CHANGED_ASSOC;
2916         sdata->vif.cfg.assoc = false;
2917
2918         sdata->deflink.u.mgd.p2p_noa_index = -1;
2919         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2920                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2921
2922         /* on the next assoc, re-program HT/VHT parameters */
2923         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2924         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2925         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2926         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2927
2928         /*
2929          * reset MU-MIMO ownership and group data in default link,
2930          * if used, other links are destroyed
2931          */
2932         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2933                sizeof(sdata->vif.bss_conf.mu_group.membership));
2934         memset(sdata->vif.bss_conf.mu_group.position, 0,
2935                sizeof(sdata->vif.bss_conf.mu_group.position));
2936         if (!sdata->vif.valid_links)
2937                 changed |= BSS_CHANGED_MU_GROUPS;
2938         sdata->vif.bss_conf.mu_mimo_owner = false;
2939
2940         sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2941
2942         del_timer_sync(&local->dynamic_ps_timer);
2943         cancel_work_sync(&local->dynamic_ps_enable_work);
2944
2945         /* Disable ARP filtering */
2946         if (sdata->vif.cfg.arp_addr_cnt)
2947                 changed |= BSS_CHANGED_ARP_FILTER;
2948
2949         sdata->vif.bss_conf.qos = false;
2950         if (!sdata->vif.valid_links) {
2951                 changed |= BSS_CHANGED_QOS;
2952                 /* The BSSID (not really interesting) and HT changed */
2953                 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2954                 ieee80211_bss_info_change_notify(sdata, changed);
2955         } else {
2956                 ieee80211_vif_cfg_change_notify(sdata, changed);
2957         }
2958
2959         /* disassociated - set to defaults now */
2960         ieee80211_set_wmm_default(&sdata->deflink, false, false);
2961
2962         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2963         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2964         del_timer_sync(&sdata->u.mgd.timer);
2965         del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer);
2966
2967         sdata->vif.bss_conf.dtim_period = 0;
2968         sdata->vif.bss_conf.beacon_rate = NULL;
2969
2970         sdata->deflink.u.mgd.have_beacon = false;
2971         sdata->deflink.u.mgd.tracking_signal_avg = false;
2972         sdata->deflink.u.mgd.disable_wmm_tracking = false;
2973
2974         ifmgd->flags = 0;
2975         sdata->deflink.u.mgd.conn_flags = 0;
2976         mutex_lock(&local->mtx);
2977
2978         for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
2979                 struct ieee80211_link_data *link;
2980
2981                 link = sdata_dereference(sdata->link[link_id], sdata);
2982                 if (!link)
2983                         continue;
2984                 ieee80211_link_release_channel(link);
2985         }
2986
2987         sdata->vif.bss_conf.csa_active = false;
2988         sdata->deflink.u.mgd.csa_waiting_bcn = false;
2989         sdata->deflink.u.mgd.csa_ignored_same_chan = false;
2990         if (sdata->deflink.csa_block_tx) {
2991                 ieee80211_wake_vif_queues(local, sdata,
2992                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2993                 sdata->deflink.csa_block_tx = false;
2994         }
2995         mutex_unlock(&local->mtx);
2996
2997         /* existing TX TSPEC sessions no longer exist */
2998         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2999         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
3000
3001         sdata->vif.bss_conf.pwr_reduction = 0;
3002         sdata->vif.bss_conf.tx_pwr_env_num = 0;
3003         memset(sdata->vif.bss_conf.tx_pwr_env, 0,
3004                sizeof(sdata->vif.bss_conf.tx_pwr_env));
3005
3006         ieee80211_vif_set_links(sdata, 0);
3007 }
3008
3009 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
3010 {
3011         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3012         struct ieee80211_local *local = sdata->local;
3013
3014         mutex_lock(&local->mtx);
3015         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
3016                 goto out;
3017
3018         __ieee80211_stop_poll(sdata);
3019
3020         mutex_lock(&local->iflist_mtx);
3021         ieee80211_recalc_ps(local);
3022         mutex_unlock(&local->iflist_mtx);
3023
3024         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3025                 goto out;
3026
3027         /*
3028          * We've received a probe response, but are not sure whether
3029          * we have or will be receiving any beacons or data, so let's
3030          * schedule the timers again, just in case.
3031          */
3032         ieee80211_sta_reset_beacon_monitor(sdata);
3033
3034         mod_timer(&ifmgd->conn_mon_timer,
3035                   round_jiffies_up(jiffies +
3036                                    IEEE80211_CONNECTION_IDLE_TIME));
3037 out:
3038         mutex_unlock(&local->mtx);
3039 }
3040
3041 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
3042                                            struct ieee80211_hdr *hdr,
3043                                            u16 tx_time)
3044 {
3045         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3046         u16 tid;
3047         int ac;
3048         struct ieee80211_sta_tx_tspec *tx_tspec;
3049         unsigned long now = jiffies;
3050
3051         if (!ieee80211_is_data_qos(hdr->frame_control))
3052                 return;
3053
3054         tid = ieee80211_get_tid(hdr);
3055         ac = ieee80211_ac_from_tid(tid);
3056         tx_tspec = &ifmgd->tx_tspec[ac];
3057
3058         if (likely(!tx_tspec->admitted_time))
3059                 return;
3060
3061         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3062                 tx_tspec->consumed_tx_time = 0;
3063                 tx_tspec->time_slice_start = now;
3064
3065                 if (tx_tspec->downgraded) {
3066                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3067                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3068                 }
3069         }
3070
3071         if (tx_tspec->downgraded)
3072                 return;
3073
3074         tx_tspec->consumed_tx_time += tx_time;
3075
3076         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
3077                 tx_tspec->downgraded = true;
3078                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
3079                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3080         }
3081 }
3082
3083 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
3084                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
3085 {
3086         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
3087
3088         if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
3089             !sdata->u.mgd.probe_send_count)
3090                 return;
3091
3092         if (ack)
3093                 sdata->u.mgd.probe_send_count = 0;
3094         else
3095                 sdata->u.mgd.nullfunc_failed = true;
3096         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3097 }
3098
3099 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
3100                                           const u8 *src, const u8 *dst,
3101                                           const u8 *ssid, size_t ssid_len,
3102                                           struct ieee80211_channel *channel)
3103 {
3104         struct sk_buff *skb;
3105
3106         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
3107                                         ssid, ssid_len, NULL, 0,
3108                                         IEEE80211_PROBE_FLAG_DIRECTED);
3109         if (skb)
3110                 ieee80211_tx_skb(sdata, skb);
3111 }
3112
3113 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
3114 {
3115         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3116         u8 *dst = sdata->vif.cfg.ap_addr;
3117         u8 unicast_limit = max(1, max_probe_tries - 3);
3118         struct sta_info *sta;
3119
3120         if (WARN_ON(sdata->vif.valid_links))
3121                 return;
3122
3123         /*
3124          * Try sending broadcast probe requests for the last three
3125          * probe requests after the first ones failed since some
3126          * buggy APs only support broadcast probe requests.
3127          */
3128         if (ifmgd->probe_send_count >= unicast_limit)
3129                 dst = NULL;
3130
3131         /*
3132          * When the hardware reports an accurate Tx ACK status, it's
3133          * better to send a nullfunc frame instead of a probe request,
3134          * as it will kick us off the AP quickly if we aren't associated
3135          * anymore. The timeout will be reset if the frame is ACKed by
3136          * the AP.
3137          */
3138         ifmgd->probe_send_count++;
3139
3140         if (dst) {
3141                 mutex_lock(&sdata->local->sta_mtx);
3142                 sta = sta_info_get(sdata, dst);
3143                 if (!WARN_ON(!sta))
3144                         ieee80211_check_fast_rx(sta);
3145                 mutex_unlock(&sdata->local->sta_mtx);
3146         }
3147
3148         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
3149                 ifmgd->nullfunc_failed = false;
3150                 ieee80211_send_nullfunc(sdata->local, sdata, false);
3151         } else {
3152                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
3153                                               sdata->vif.cfg.ssid,
3154                                               sdata->vif.cfg.ssid_len,
3155                                               sdata->deflink.u.mgd.bss->channel);
3156         }
3157
3158         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
3159         run_again(sdata, ifmgd->probe_timeout);
3160 }
3161
3162 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
3163                                    bool beacon)
3164 {
3165         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3166         bool already = false;
3167
3168         if (WARN_ON(sdata->vif.valid_links))
3169                 return;
3170
3171         if (!ieee80211_sdata_running(sdata))
3172                 return;
3173
3174         sdata_lock(sdata);
3175
3176         if (!ifmgd->associated)
3177                 goto out;
3178
3179         mutex_lock(&sdata->local->mtx);
3180
3181         if (sdata->local->tmp_channel || sdata->local->scanning) {
3182                 mutex_unlock(&sdata->local->mtx);
3183                 goto out;
3184         }
3185
3186         if (sdata->local->suspending) {
3187                 /* reschedule after resume */
3188                 mutex_unlock(&sdata->local->mtx);
3189                 ieee80211_reset_ap_probe(sdata);
3190                 goto out;
3191         }
3192
3193         if (beacon) {
3194                 mlme_dbg_ratelimited(sdata,
3195                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
3196                                      beacon_loss_count);
3197
3198                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
3199         }
3200
3201         /*
3202          * The driver/our work has already reported this event or the
3203          * connection monitoring has kicked in and we have already sent
3204          * a probe request. Or maybe the AP died and the driver keeps
3205          * reporting until we disassociate...
3206          *
3207          * In either case we have to ignore the current call to this
3208          * function (except for setting the correct probe reason bit)
3209          * because otherwise we would reset the timer every time and
3210          * never check whether we received a probe response!
3211          */
3212         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
3213                 already = true;
3214
3215         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
3216
3217         mutex_unlock(&sdata->local->mtx);
3218
3219         if (already)
3220                 goto out;
3221
3222         mutex_lock(&sdata->local->iflist_mtx);
3223         ieee80211_recalc_ps(sdata->local);
3224         mutex_unlock(&sdata->local->iflist_mtx);
3225
3226         ifmgd->probe_send_count = 0;
3227         ieee80211_mgd_probe_ap_send(sdata);
3228  out:
3229         sdata_unlock(sdata);
3230 }
3231
3232 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
3233                                           struct ieee80211_vif *vif)
3234 {
3235         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3236         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3237         struct cfg80211_bss *cbss;
3238         struct sk_buff *skb;
3239         const struct element *ssid;
3240         int ssid_len;
3241
3242         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
3243                     sdata->vif.valid_links))
3244                 return NULL;
3245
3246         sdata_assert_lock(sdata);
3247
3248         if (ifmgd->associated)
3249                 cbss = sdata->deflink.u.mgd.bss;
3250         else if (ifmgd->auth_data)
3251                 cbss = ifmgd->auth_data->bss;
3252         else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss)
3253                 cbss = ifmgd->assoc_data->link[0].bss;
3254         else
3255                 return NULL;
3256
3257         rcu_read_lock();
3258         ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
3259         if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
3260                       "invalid SSID element (len=%d)",
3261                       ssid ? ssid->datalen : -1))
3262                 ssid_len = 0;
3263         else
3264                 ssid_len = ssid->datalen;
3265
3266         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
3267                                         (u32) -1, cbss->channel,
3268                                         ssid->data, ssid_len,
3269                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
3270         rcu_read_unlock();
3271
3272         return skb;
3273 }
3274 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
3275
3276 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
3277                                         const u8 *buf, size_t len, bool tx,
3278                                         u16 reason, bool reconnect)
3279 {
3280         struct ieee80211_event event = {
3281                 .type = MLME_EVENT,
3282                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
3283                 .u.mlme.reason = reason,
3284         };
3285
3286         if (tx)
3287                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
3288         else
3289                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
3290
3291         drv_event_callback(sdata->local, sdata, &event);
3292 }
3293
3294 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
3295 {
3296         struct ieee80211_local *local = sdata->local;
3297         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3298         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3299         bool tx;
3300
3301         sdata_lock(sdata);
3302         if (!ifmgd->associated) {
3303                 sdata_unlock(sdata);
3304                 return;
3305         }
3306
3307         /* in MLO assume we have a link where we can TX the frame */
3308         tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx;
3309
3310         if (!ifmgd->driver_disconnect) {
3311                 unsigned int link_id;
3312
3313                 /*
3314                  * AP is probably out of range (or not reachable for another
3315                  * reason) so remove the bss structs for that AP. In the case
3316                  * of multi-link, it's not clear that all of them really are
3317                  * out of range, but if they weren't the driver likely would
3318                  * have switched to just have a single link active?
3319                  */
3320                 for (link_id = 0;
3321                      link_id < ARRAY_SIZE(sdata->link);
3322                      link_id++) {
3323                         struct ieee80211_link_data *link;
3324
3325                         link = sdata_dereference(sdata->link[link_id], sdata);
3326                         if (!link)
3327                                 continue;
3328                         cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss);
3329                         link->u.mgd.bss = NULL;
3330                 }
3331         }
3332
3333         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3334                                ifmgd->driver_disconnect ?
3335                                         WLAN_REASON_DEAUTH_LEAVING :
3336                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3337                                tx, frame_buf);
3338         mutex_lock(&local->mtx);
3339         /* the other links will be destroyed */
3340         sdata->vif.bss_conf.csa_active = false;
3341         sdata->deflink.u.mgd.csa_waiting_bcn = false;
3342         if (sdata->deflink.csa_block_tx) {
3343                 ieee80211_wake_vif_queues(local, sdata,
3344                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3345                 sdata->deflink.csa_block_tx = false;
3346         }
3347         mutex_unlock(&local->mtx);
3348
3349         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
3350                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3351                                     ifmgd->reconnect);
3352         ifmgd->reconnect = false;
3353
3354         sdata_unlock(sdata);
3355 }
3356
3357 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
3358 {
3359         struct ieee80211_sub_if_data *sdata =
3360                 container_of(work, struct ieee80211_sub_if_data,
3361                              u.mgd.beacon_connection_loss_work);
3362         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3363
3364         if (ifmgd->connection_loss) {
3365                 sdata_info(sdata, "Connection to AP %pM lost\n",
3366                            sdata->vif.cfg.ap_addr);
3367                 __ieee80211_disconnect(sdata);
3368                 ifmgd->connection_loss = false;
3369         } else if (ifmgd->driver_disconnect) {
3370                 sdata_info(sdata,
3371                            "Driver requested disconnection from AP %pM\n",
3372                            sdata->vif.cfg.ap_addr);
3373                 __ieee80211_disconnect(sdata);
3374                 ifmgd->driver_disconnect = false;
3375         } else {
3376                 if (ifmgd->associated)
3377                         sdata->deflink.u.mgd.beacon_loss_count++;
3378                 ieee80211_mgd_probe_ap(sdata, true);
3379         }
3380 }
3381
3382 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
3383 {
3384         struct ieee80211_sub_if_data *sdata =
3385                 container_of(work, struct ieee80211_sub_if_data,
3386                              u.mgd.csa_connection_drop_work);
3387
3388         __ieee80211_disconnect(sdata);
3389 }
3390
3391 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
3392 {
3393         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3394         struct ieee80211_hw *hw = &sdata->local->hw;
3395
3396         trace_api_beacon_loss(sdata);
3397
3398         sdata->u.mgd.connection_loss = false;
3399         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3400 }
3401 EXPORT_SYMBOL(ieee80211_beacon_loss);
3402
3403 void ieee80211_connection_loss(struct ieee80211_vif *vif)
3404 {
3405         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3406         struct ieee80211_hw *hw = &sdata->local->hw;
3407
3408         trace_api_connection_loss(sdata);
3409
3410         sdata->u.mgd.connection_loss = true;
3411         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3412 }
3413 EXPORT_SYMBOL(ieee80211_connection_loss);
3414
3415 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
3416 {
3417         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3418         struct ieee80211_hw *hw = &sdata->local->hw;
3419
3420         trace_api_disconnect(sdata, reconnect);
3421
3422         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
3423                 return;
3424
3425         sdata->u.mgd.driver_disconnect = true;
3426         sdata->u.mgd.reconnect = reconnect;
3427         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3428 }
3429 EXPORT_SYMBOL(ieee80211_disconnect);
3430
3431 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
3432                                         bool assoc)
3433 {
3434         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3435
3436         sdata_assert_lock(sdata);
3437
3438         if (!assoc) {
3439                 /*
3440                  * we are not authenticated yet, the only timer that could be
3441                  * running is the timeout for the authentication response which
3442                  * which is not relevant anymore.
3443                  */
3444                 del_timer_sync(&sdata->u.mgd.timer);
3445                 sta_info_destroy_addr(sdata, auth_data->ap_addr);
3446
3447                 /* other links are destroyed */
3448                 sdata->deflink.u.mgd.conn_flags = 0;
3449                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3450                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3451                                                   BSS_CHANGED_BSSID);
3452                 sdata->u.mgd.flags = 0;
3453
3454                 mutex_lock(&sdata->local->mtx);
3455                 ieee80211_link_release_channel(&sdata->deflink);
3456                 ieee80211_vif_set_links(sdata, 0);
3457                 mutex_unlock(&sdata->local->mtx);
3458         }
3459
3460         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
3461         kfree(auth_data);
3462         sdata->u.mgd.auth_data = NULL;
3463 }
3464
3465 enum assoc_status {
3466         ASSOC_SUCCESS,
3467         ASSOC_REJECTED,
3468         ASSOC_TIMEOUT,
3469         ASSOC_ABANDON,
3470 };
3471
3472 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
3473                                          enum assoc_status status)
3474 {
3475         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3476
3477         sdata_assert_lock(sdata);
3478
3479         if (status != ASSOC_SUCCESS) {
3480                 /*
3481                  * we are not associated yet, the only timer that could be
3482                  * running is the timeout for the association response which
3483                  * which is not relevant anymore.
3484                  */
3485                 del_timer_sync(&sdata->u.mgd.timer);
3486                 sta_info_destroy_addr(sdata, assoc_data->ap_addr);
3487
3488                 sdata->deflink.u.mgd.conn_flags = 0;
3489                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3490                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3491                                                   BSS_CHANGED_BSSID);
3492                 sdata->u.mgd.flags = 0;
3493                 sdata->vif.bss_conf.mu_mimo_owner = false;
3494
3495                 if (status != ASSOC_REJECTED) {
3496                         struct cfg80211_assoc_failure data = {
3497                                 .timeout = status == ASSOC_TIMEOUT,
3498                         };
3499                         int i;
3500
3501                         BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
3502                                      ARRAY_SIZE(assoc_data->link));
3503
3504                         for (i = 0; i < ARRAY_SIZE(data.bss); i++)
3505                                 data.bss[i] = assoc_data->link[i].bss;
3506
3507                         if (sdata->vif.valid_links)
3508                                 data.ap_mld_addr = assoc_data->ap_addr;
3509
3510                         cfg80211_assoc_failure(sdata->dev, &data);
3511                 }
3512
3513                 mutex_lock(&sdata->local->mtx);
3514                 ieee80211_link_release_channel(&sdata->deflink);
3515                 ieee80211_vif_set_links(sdata, 0);
3516                 mutex_unlock(&sdata->local->mtx);
3517         }
3518
3519         kfree(assoc_data);
3520         sdata->u.mgd.assoc_data = NULL;
3521 }
3522
3523 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
3524                                      struct ieee80211_mgmt *mgmt, size_t len)
3525 {
3526         struct ieee80211_local *local = sdata->local;
3527         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3528         const struct element *challenge;
3529         u8 *pos;
3530         u32 tx_flags = 0;
3531         struct ieee80211_prep_tx_info info = {
3532                 .subtype = IEEE80211_STYPE_AUTH,
3533         };
3534
3535         pos = mgmt->u.auth.variable;
3536         challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
3537                                        len - (pos - (u8 *)mgmt));
3538         if (!challenge)
3539                 return;
3540         auth_data->expected_transaction = 4;
3541         drv_mgd_prepare_tx(sdata->local, sdata, &info);
3542         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3543                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3544                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3545         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
3546                             (void *)challenge,
3547                             challenge->datalen + sizeof(*challenge),
3548                             auth_data->ap_addr, auth_data->ap_addr,
3549                             auth_data->key, auth_data->key_len,
3550                             auth_data->key_idx, tx_flags);
3551 }
3552
3553 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
3554 {
3555         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3556         const u8 *ap_addr = ifmgd->auth_data->ap_addr;
3557         struct sta_info *sta;
3558         bool result = true;
3559
3560         sdata_info(sdata, "authenticated\n");
3561         ifmgd->auth_data->done = true;
3562         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
3563         ifmgd->auth_data->timeout_started = true;
3564         run_again(sdata, ifmgd->auth_data->timeout);
3565
3566         /* move station state to auth */
3567         mutex_lock(&sdata->local->sta_mtx);
3568         sta = sta_info_get(sdata, ap_addr);
3569         if (!sta) {
3570                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
3571                 result = false;
3572                 goto out;
3573         }
3574         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
3575                 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
3576                 result = false;
3577                 goto out;
3578         }
3579
3580 out:
3581         mutex_unlock(&sdata->local->sta_mtx);
3582         return result;
3583 }
3584
3585 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3586                                    struct ieee80211_mgmt *mgmt, size_t len)
3587 {
3588         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3589         u16 auth_alg, auth_transaction, status_code;
3590         struct ieee80211_event event = {
3591                 .type = MLME_EVENT,
3592                 .u.mlme.data = AUTH_EVENT,
3593         };
3594         struct ieee80211_prep_tx_info info = {
3595                 .subtype = IEEE80211_STYPE_AUTH,
3596         };
3597
3598         sdata_assert_lock(sdata);
3599
3600         if (len < 24 + 6)
3601                 return;
3602
3603         if (!ifmgd->auth_data || ifmgd->auth_data->done)
3604                 return;
3605
3606         if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid))
3607                 return;
3608
3609         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3610         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3611         status_code = le16_to_cpu(mgmt->u.auth.status_code);
3612
3613         if (auth_alg != ifmgd->auth_data->algorithm ||
3614             (auth_alg != WLAN_AUTH_SAE &&
3615              auth_transaction != ifmgd->auth_data->expected_transaction) ||
3616             (auth_alg == WLAN_AUTH_SAE &&
3617              (auth_transaction < ifmgd->auth_data->expected_transaction ||
3618               auth_transaction > 2))) {
3619                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3620                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3621                            auth_transaction,
3622                            ifmgd->auth_data->expected_transaction);
3623                 goto notify_driver;
3624         }
3625
3626         if (status_code != WLAN_STATUS_SUCCESS) {
3627                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3628
3629                 if (auth_alg == WLAN_AUTH_SAE &&
3630                     (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3631                      (auth_transaction == 1 &&
3632                       (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3633                        status_code == WLAN_STATUS_SAE_PK)))) {
3634                         /* waiting for userspace now */
3635                         ifmgd->auth_data->waiting = true;
3636                         ifmgd->auth_data->timeout =
3637                                 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
3638                         ifmgd->auth_data->timeout_started = true;
3639                         run_again(sdata, ifmgd->auth_data->timeout);
3640                         goto notify_driver;
3641                 }
3642
3643                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
3644                            mgmt->sa, status_code);
3645                 ieee80211_destroy_auth_data(sdata, false);
3646                 event.u.mlme.status = MLME_DENIED;
3647                 event.u.mlme.reason = status_code;
3648                 drv_event_callback(sdata->local, sdata, &event);
3649                 goto notify_driver;
3650         }
3651
3652         switch (ifmgd->auth_data->algorithm) {
3653         case WLAN_AUTH_OPEN:
3654         case WLAN_AUTH_LEAP:
3655         case WLAN_AUTH_FT:
3656         case WLAN_AUTH_SAE:
3657         case WLAN_AUTH_FILS_SK:
3658         case WLAN_AUTH_FILS_SK_PFS:
3659         case WLAN_AUTH_FILS_PK:
3660                 break;
3661         case WLAN_AUTH_SHARED_KEY:
3662                 if (ifmgd->auth_data->expected_transaction != 4) {
3663                         ieee80211_auth_challenge(sdata, mgmt, len);
3664                         /* need another frame */
3665                         return;
3666                 }
3667                 break;
3668         default:
3669                 WARN_ONCE(1, "invalid auth alg %d",
3670                           ifmgd->auth_data->algorithm);
3671                 goto notify_driver;
3672         }
3673
3674         event.u.mlme.status = MLME_SUCCESS;
3675         info.success = 1;
3676         drv_event_callback(sdata->local, sdata, &event);
3677         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3678             (auth_transaction == 2 &&
3679              ifmgd->auth_data->expected_transaction == 2)) {
3680                 if (!ieee80211_mark_sta_auth(sdata))
3681                         return; /* ignore frame -- wait for timeout */
3682         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3683                    auth_transaction == 2) {
3684                 sdata_info(sdata, "SAE peer confirmed\n");
3685                 ifmgd->auth_data->peer_confirmed = true;
3686         }
3687
3688         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3689 notify_driver:
3690         drv_mgd_complete_tx(sdata->local, sdata, &info);
3691 }
3692
3693 #define case_WLAN(type) \
3694         case WLAN_REASON_##type: return #type
3695
3696 const char *ieee80211_get_reason_code_string(u16 reason_code)
3697 {
3698         switch (reason_code) {
3699         case_WLAN(UNSPECIFIED);
3700         case_WLAN(PREV_AUTH_NOT_VALID);
3701         case_WLAN(DEAUTH_LEAVING);
3702         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3703         case_WLAN(DISASSOC_AP_BUSY);
3704         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3705         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3706         case_WLAN(DISASSOC_STA_HAS_LEFT);
3707         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3708         case_WLAN(DISASSOC_BAD_POWER);
3709         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3710         case_WLAN(INVALID_IE);
3711         case_WLAN(MIC_FAILURE);
3712         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3713         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3714         case_WLAN(IE_DIFFERENT);
3715         case_WLAN(INVALID_GROUP_CIPHER);
3716         case_WLAN(INVALID_PAIRWISE_CIPHER);
3717         case_WLAN(INVALID_AKMP);
3718         case_WLAN(UNSUPP_RSN_VERSION);
3719         case_WLAN(INVALID_RSN_IE_CAP);
3720         case_WLAN(IEEE8021X_FAILED);
3721         case_WLAN(CIPHER_SUITE_REJECTED);
3722         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3723         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3724         case_WLAN(DISASSOC_LOW_ACK);
3725         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3726         case_WLAN(QSTA_LEAVE_QBSS);
3727         case_WLAN(QSTA_NOT_USE);
3728         case_WLAN(QSTA_REQUIRE_SETUP);
3729         case_WLAN(QSTA_TIMEOUT);
3730         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3731         case_WLAN(MESH_PEER_CANCELED);
3732         case_WLAN(MESH_MAX_PEERS);
3733         case_WLAN(MESH_CONFIG);
3734         case_WLAN(MESH_CLOSE);
3735         case_WLAN(MESH_MAX_RETRIES);
3736         case_WLAN(MESH_CONFIRM_TIMEOUT);
3737         case_WLAN(MESH_INVALID_GTK);
3738         case_WLAN(MESH_INCONSISTENT_PARAM);
3739         case_WLAN(MESH_INVALID_SECURITY);
3740         case_WLAN(MESH_PATH_ERROR);
3741         case_WLAN(MESH_PATH_NOFORWARD);
3742         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3743         case_WLAN(MAC_EXISTS_IN_MBSS);
3744         case_WLAN(MESH_CHAN_REGULATORY);
3745         case_WLAN(MESH_CHAN);
3746         default: return "<unknown>";
3747         }
3748 }
3749
3750 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3751                                      struct ieee80211_mgmt *mgmt, size_t len)
3752 {
3753         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3754         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3755
3756         sdata_assert_lock(sdata);
3757
3758         if (len < 24 + 2)
3759                 return;
3760
3761         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3762                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3763                 return;
3764         }
3765
3766         if (ifmgd->associated &&
3767             ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) {
3768                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3769                            sdata->vif.cfg.ap_addr, reason_code,
3770                            ieee80211_get_reason_code_string(reason_code));
3771
3772                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3773
3774                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3775                                             reason_code, false);
3776                 return;
3777         }
3778
3779         if (ifmgd->assoc_data &&
3780             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) {
3781                 sdata_info(sdata,
3782                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3783                            ifmgd->assoc_data->ap_addr, reason_code,
3784                            ieee80211_get_reason_code_string(reason_code));
3785
3786                 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
3787
3788                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3789                 return;
3790         }
3791 }
3792
3793
3794 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3795                                        struct ieee80211_mgmt *mgmt, size_t len)
3796 {
3797         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3798         u16 reason_code;
3799
3800         sdata_assert_lock(sdata);
3801
3802         if (len < 24 + 2)
3803                 return;
3804
3805         if (!ifmgd->associated ||
3806             !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
3807                 return;
3808
3809         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3810
3811         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3812                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3813                 return;
3814         }
3815
3816         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3817                    sdata->vif.cfg.ap_addr, reason_code,
3818                    ieee80211_get_reason_code_string(reason_code));
3819
3820         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3821
3822         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3823                                     false);
3824 }
3825
3826 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3827                                 u8 *supp_rates, unsigned int supp_rates_len,
3828                                 u32 *rates, u32 *basic_rates,
3829                                 bool *have_higher_than_11mbit,
3830                                 int *min_rate, int *min_rate_index,
3831                                 int shift)
3832 {
3833         int i, j;
3834
3835         for (i = 0; i < supp_rates_len; i++) {
3836                 int rate = supp_rates[i] & 0x7f;
3837                 bool is_basic = !!(supp_rates[i] & 0x80);
3838
3839                 if ((rate * 5 * (1 << shift)) > 110)
3840                         *have_higher_than_11mbit = true;
3841
3842                 /*
3843                  * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
3844                  * since they're not rates.
3845                  *
3846                  * Note: Even though the membership selector and the basic
3847                  *       rate flag share the same bit, they are not exactly
3848                  *       the same.
3849                  */
3850                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3851                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3852                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3853                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3854                         continue;
3855
3856                 for (j = 0; j < sband->n_bitrates; j++) {
3857                         struct ieee80211_rate *br;
3858                         int brate;
3859
3860                         br = &sband->bitrates[j];
3861
3862                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3863                         if (brate == rate) {
3864                                 *rates |= BIT(j);
3865                                 if (is_basic)
3866                                         *basic_rates |= BIT(j);
3867                                 if ((rate * 5) < *min_rate) {
3868                                         *min_rate = rate * 5;
3869                                         *min_rate_index = j;
3870                                 }
3871                                 break;
3872                         }
3873                 }
3874         }
3875 }
3876
3877 static bool ieee80211_twt_req_supported(const struct link_sta_info *link_sta,
3878                                         const struct ieee802_11_elems *elems)
3879 {
3880         if (elems->ext_capab_len < 10)
3881                 return false;
3882
3883         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3884                 return false;
3885
3886         return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] &
3887                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3888 }
3889
3890 static int ieee80211_recalc_twt_req(struct ieee80211_link_data *link,
3891                                     struct link_sta_info *link_sta,
3892                                     struct ieee802_11_elems *elems)
3893 {
3894         bool twt = ieee80211_twt_req_supported(link_sta, elems);
3895
3896         if (link->conf->twt_requester != twt) {
3897                 link->conf->twt_requester = twt;
3898                 return BSS_CHANGED_TWT;
3899         }
3900         return 0;
3901 }
3902
3903 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
3904                                         struct ieee80211_bss_conf *bss_conf,
3905                                         struct ieee80211_supported_band *sband,
3906                                         struct link_sta_info *link_sta)
3907 {
3908         const struct ieee80211_sta_he_cap *own_he_cap =
3909                 ieee80211_get_he_iftype_cap(sband,
3910                                             ieee80211_vif_type_p2p(&sdata->vif));
3911
3912         return bss_conf->he_support &&
3913                 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] &
3914                         IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
3915                 own_he_cap &&
3916                 (own_he_cap->he_cap_elem.mac_cap_info[2] &
3917                         IEEE80211_HE_MAC_CAP2_BCAST_TWT);
3918 }
3919
3920 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
3921                                         struct link_sta_info *link_sta,
3922                                         struct cfg80211_bss *cbss,
3923                                         struct ieee80211_mgmt *mgmt,
3924                                         const u8 *elem_start,
3925                                         unsigned int elem_len,
3926                                         u64 *changed)
3927 {
3928         struct ieee80211_sub_if_data *sdata = link->sdata;
3929         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3930         struct ieee80211_bss_conf *bss_conf = link->conf;
3931         struct ieee80211_local *local = sdata->local;
3932         struct ieee80211_elems_parse_params parse_params = {
3933                 .start = elem_start,
3934                 .len = elem_len,
3935                 .bss = cbss,
3936                 .link_id = link == &sdata->deflink ? -1 : link->link_id,
3937                 .from_ap = true,
3938         };
3939         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3940         bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
3941         const struct cfg80211_bss_ies *bss_ies = NULL;
3942         struct ieee80211_supported_band *sband;
3943         struct ieee802_11_elems *elems;
3944         u16 capab_info;
3945         bool ret;
3946
3947         elems = ieee802_11_parse_elems_full(&parse_params);
3948         if (!elems)
3949                 return false;
3950
3951         /* FIXME: use from STA profile element after parsing that */
3952         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3953
3954         if (!is_s1g && !elems->supp_rates) {
3955                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3956                 ret = false;
3957                 goto out;
3958         }
3959
3960         link->u.mgd.tdls_chan_switch_prohibited =
3961                 elems->ext_capab && elems->ext_capab_len >= 5 &&
3962                 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3963
3964         /*
3965          * Some APs are erroneously not including some information in their
3966          * (re)association response frames. Try to recover by using the data
3967          * from the beacon or probe response. This seems to afflict mobile
3968          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3969          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3970          */
3971         if (!is_6ghz &&
3972             ((assoc_data->wmm && !elems->wmm_param) ||
3973              (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
3974               (!elems->ht_cap_elem || !elems->ht_operation)) ||
3975              (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
3976               (!elems->vht_cap_elem || !elems->vht_operation)))) {
3977                 const struct cfg80211_bss_ies *ies;
3978                 struct ieee802_11_elems *bss_elems;
3979
3980                 rcu_read_lock();
3981                 ies = rcu_dereference(cbss->ies);
3982                 if (ies)
3983                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3984                                           GFP_ATOMIC);
3985                 rcu_read_unlock();
3986                 if (!bss_ies) {
3987                         ret = false;
3988                         goto out;
3989                 }
3990
3991                 parse_params.start = bss_ies->data;
3992                 parse_params.len = bss_ies->len;
3993                 bss_elems = ieee802_11_parse_elems_full(&parse_params);
3994                 if (!bss_elems) {
3995                         ret = false;
3996                         goto out;
3997                 }
3998
3999                 if (assoc_data->wmm &&
4000                     !elems->wmm_param && bss_elems->wmm_param) {
4001                         elems->wmm_param = bss_elems->wmm_param;
4002                         sdata_info(sdata,
4003                                    "AP bug: WMM param missing from AssocResp\n");
4004                 }
4005
4006                 /*
4007                  * Also check if we requested HT/VHT, otherwise the AP doesn't
4008                  * have to include the IEs in the (re)association response.
4009                  */
4010                 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
4011                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4012                         elems->ht_cap_elem = bss_elems->ht_cap_elem;
4013                         sdata_info(sdata,
4014                                    "AP bug: HT capability missing from AssocResp\n");
4015                 }
4016                 if (!elems->ht_operation && bss_elems->ht_operation &&
4017                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4018                         elems->ht_operation = bss_elems->ht_operation;
4019                         sdata_info(sdata,
4020                                    "AP bug: HT operation missing from AssocResp\n");
4021                 }
4022                 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
4023                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4024                         elems->vht_cap_elem = bss_elems->vht_cap_elem;
4025                         sdata_info(sdata,
4026                                    "AP bug: VHT capa missing from AssocResp\n");
4027                 }
4028                 if (!elems->vht_operation && bss_elems->vht_operation &&
4029                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4030                         elems->vht_operation = bss_elems->vht_operation;
4031                         sdata_info(sdata,
4032                                    "AP bug: VHT operation missing from AssocResp\n");
4033                 }
4034
4035                 kfree(bss_elems);
4036         }
4037
4038         /*
4039          * We previously checked these in the beacon/probe response, so
4040          * they should be present here. This is just a safety net.
4041          */
4042         if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
4043             (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
4044                 sdata_info(sdata,
4045                            "HT AP is missing WMM params or HT capability/operation\n");
4046                 ret = false;
4047                 goto out;
4048         }
4049
4050         if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
4051             (!elems->vht_cap_elem || !elems->vht_operation)) {
4052                 sdata_info(sdata,
4053                            "VHT AP is missing VHT capability/operation\n");
4054                 ret = false;
4055                 goto out;
4056         }
4057
4058         if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4059             !elems->he_6ghz_capa) {
4060                 sdata_info(sdata,
4061                            "HE 6 GHz AP is missing HE 6 GHz band capability\n");
4062                 ret = false;
4063                 goto out;
4064         }
4065
4066         if (WARN_ON(!link->conf->chandef.chan)) {
4067                 ret = false;
4068                 goto out;
4069         }
4070         sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
4071
4072         if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4073             (!elems->he_cap || !elems->he_operation)) {
4074                 sdata_info(sdata,
4075                            "HE AP is missing HE capability/operation\n");
4076                 ret = false;
4077                 goto out;
4078         }
4079
4080         /* Set up internal HT/VHT capabilities */
4081         if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT))
4082                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
4083                                                   elems->ht_cap_elem,
4084                                                   link_sta);
4085
4086         if (elems->vht_cap_elem &&
4087             !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4088                 const struct ieee80211_vht_cap *bss_vht_cap = NULL;
4089                 const struct cfg80211_bss_ies *ies;
4090
4091                 /*
4092                  * Cisco AP module 9115 with FW 17.3 has a bug and sends a
4093                  * too large maximum MPDU length in the association response
4094                  * (indicating 12k) that it cannot actually process ...
4095                  * Work around that.
4096                  */
4097                 rcu_read_lock();
4098                 ies = rcu_dereference(cbss->ies);
4099                 if (ies) {
4100                         const struct element *elem;
4101
4102                         elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY,
4103                                                   ies->data, ies->len);
4104                         if (elem && elem->datalen >= sizeof(*bss_vht_cap))
4105                                 bss_vht_cap = (const void *)elem->data;
4106                 }
4107
4108                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4109                                                     elems->vht_cap_elem,
4110                                                     bss_vht_cap, link_sta);
4111                 rcu_read_unlock();
4112         }
4113
4114         if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4115             elems->he_cap) {
4116                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
4117                                                   elems->he_cap,
4118                                                   elems->he_cap_len,
4119                                                   elems->he_6ghz_capa,
4120                                                   link_sta);
4121
4122                 bss_conf->he_support = link_sta->pub->he_cap.has_he;
4123                 if (elems->rsnx && elems->rsnx_len &&
4124                     (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
4125                     wiphy_ext_feature_isset(local->hw.wiphy,
4126                                             NL80211_EXT_FEATURE_PROTECTED_TWT))
4127                         bss_conf->twt_protected = true;
4128                 else
4129                         bss_conf->twt_protected = false;
4130
4131                 *changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
4132
4133                 if (elems->eht_operation && elems->eht_cap &&
4134                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
4135                         ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
4136                                                             elems->he_cap,
4137                                                             elems->he_cap_len,
4138                                                             elems->eht_cap,
4139                                                             elems->eht_cap_len,
4140                                                             link_sta);
4141
4142                         bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
4143                 } else {
4144                         bss_conf->eht_support = false;
4145                 }
4146         } else {
4147                 bss_conf->he_support = false;
4148                 bss_conf->twt_requester = false;
4149                 bss_conf->twt_protected = false;
4150                 bss_conf->eht_support = false;
4151         }
4152
4153         bss_conf->twt_broadcast =
4154                 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
4155
4156         if (bss_conf->he_support) {
4157                 bss_conf->he_bss_color.color =
4158                         le32_get_bits(elems->he_operation->he_oper_params,
4159                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
4160                 bss_conf->he_bss_color.partial =
4161                         le32_get_bits(elems->he_operation->he_oper_params,
4162                                       IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
4163                 bss_conf->he_bss_color.enabled =
4164                         !le32_get_bits(elems->he_operation->he_oper_params,
4165                                        IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
4166
4167                 if (bss_conf->he_bss_color.enabled)
4168                         *changed |= BSS_CHANGED_HE_BSS_COLOR;
4169
4170                 bss_conf->htc_trig_based_pkt_ext =
4171                         le32_get_bits(elems->he_operation->he_oper_params,
4172                                       IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
4173                 bss_conf->frame_time_rts_th =
4174                         le32_get_bits(elems->he_operation->he_oper_params,
4175                                       IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
4176
4177                 bss_conf->uora_exists = !!elems->uora_element;
4178                 if (elems->uora_element)
4179                         bss_conf->uora_ocw_range = elems->uora_element[0];
4180
4181                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
4182                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
4183                 /* TODO: OPEN: what happens if BSS color disable is set? */
4184         }
4185
4186         if (cbss->transmitted_bss) {
4187                 bss_conf->nontransmitted = true;
4188                 ether_addr_copy(bss_conf->transmitter_bssid,
4189                                 cbss->transmitted_bss->bssid);
4190                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
4191                 bss_conf->bssid_index = cbss->bssid_index;
4192         }
4193
4194         /*
4195          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
4196          * in their association response, so ignore that data for our own
4197          * configuration. If it changed since the last beacon, we'll get the
4198          * next beacon and update then.
4199          */
4200
4201         /*
4202          * If an operating mode notification IE is present, override the
4203          * NSS calculation (that would be done in rate_control_rate_init())
4204          * and use the # of streams from that element.
4205          */
4206         if (elems->opmode_notif &&
4207             !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
4208                 u8 nss;
4209
4210                 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
4211                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
4212                 nss += 1;
4213                 link_sta->pub->rx_nss = nss;
4214         }
4215
4216         /*
4217          * Always handle WMM once after association regardless
4218          * of the first value the AP uses. Setting -1 here has
4219          * that effect because the AP values is an unsigned
4220          * 4-bit value.
4221          */
4222         link->u.mgd.wmm_last_param_set = -1;
4223         link->u.mgd.mu_edca_last_param_set = -1;
4224
4225         if (link->u.mgd.disable_wmm_tracking) {
4226                 ieee80211_set_wmm_default(link, false, false);
4227         } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param,
4228                                              elems->wmm_param_len,
4229                                              elems->mu_edca_param_set)) {
4230                 /* still enable QoS since we might have HT/VHT */
4231                 ieee80211_set_wmm_default(link, false, true);
4232                 /* disable WMM tracking in this case to disable
4233                  * tracking WMM parameter changes in the beacon if
4234                  * the parameters weren't actually valid. Doing so
4235                  * avoids changing parameters very strangely when
4236                  * the AP is going back and forth between valid and
4237                  * invalid parameters.
4238                  */
4239                 link->u.mgd.disable_wmm_tracking = true;
4240         }
4241
4242         if (elems->max_idle_period_ie) {
4243                 bss_conf->max_idle_period =
4244                         le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
4245                 bss_conf->protected_keep_alive =
4246                         !!(elems->max_idle_period_ie->idle_options &
4247                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
4248                 *changed |= BSS_CHANGED_KEEP_ALIVE;
4249         } else {
4250                 bss_conf->max_idle_period = 0;
4251                 bss_conf->protected_keep_alive = false;
4252         }
4253
4254         /* set assoc capability (AID was already set earlier),
4255          * ieee80211_set_associated() will tell the driver */
4256         bss_conf->assoc_capability = capab_info;
4257
4258         ret = true;
4259 out:
4260         kfree(elems);
4261         kfree(bss_ies);
4262         return ret;
4263 }
4264
4265 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
4266                                         struct sta_info *sta,
4267                                         struct link_sta_info *link_sta,
4268                                         struct cfg80211_bss *cbss)
4269 {
4270         struct ieee80211_sub_if_data *sdata = link->sdata;
4271         struct ieee80211_local *local = sdata->local;
4272         struct ieee80211_bss *bss = (void *)cbss->priv;
4273         u32 rates = 0, basic_rates = 0;
4274         bool have_higher_than_11mbit = false;
4275         int min_rate = INT_MAX, min_rate_index = -1;
4276         /* this is clearly wrong for MLO but we'll just remove it later */
4277         int shift = ieee80211_vif_get_shift(&sdata->vif);
4278         struct ieee80211_supported_band *sband;
4279
4280         memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
4281         memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN);
4282
4283         /* TODO: S1G Basic Rate Set is expressed elsewhere */
4284         if (cbss->channel->band == NL80211_BAND_S1GHZ) {
4285                 ieee80211_s1g_sta_rate_init(sta);
4286                 return 0;
4287         }
4288
4289         sband = local->hw.wiphy->bands[cbss->channel->band];
4290
4291         ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
4292                             &rates, &basic_rates, &have_higher_than_11mbit,
4293                             &min_rate, &min_rate_index, shift);
4294
4295         /*
4296          * This used to be a workaround for basic rates missing
4297          * in the association response frame. Now that we no
4298          * longer use the basic rates from there, it probably
4299          * doesn't happen any more, but keep the workaround so
4300          * in case some *other* APs are buggy in different ways
4301          * we can connect -- with a warning.
4302          * Allow this workaround only in case the AP provided at least
4303          * one rate.
4304          */
4305         if (min_rate_index < 0) {
4306                 link_info(link, "No legacy rates in association response\n");
4307                 return -EINVAL;
4308         } else if (!basic_rates) {
4309                 link_info(link, "No basic rates, using min rate instead\n");
4310                 basic_rates = BIT(min_rate_index);
4311         }
4312
4313         if (rates)
4314                 link_sta->pub->supp_rates[cbss->channel->band] = rates;
4315         else
4316                 link_info(link, "No rates found, keeping mandatory only\n");
4317
4318         link->conf->basic_rates = basic_rates;
4319
4320         /* cf. IEEE 802.11 9.2.12 */
4321         link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
4322                                    have_higher_than_11mbit;
4323
4324         return 0;
4325 }
4326
4327 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
4328                                   struct cfg80211_bss *cbss)
4329 {
4330         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4331         const struct element *ht_cap_elem, *vht_cap_elem;
4332         const struct cfg80211_bss_ies *ies;
4333         const struct ieee80211_ht_cap *ht_cap;
4334         const struct ieee80211_vht_cap *vht_cap;
4335         const struct ieee80211_he_cap_elem *he_cap;
4336         const struct element *he_cap_elem;
4337         u16 mcs_80_map, mcs_160_map;
4338         int i, mcs_nss_size;
4339         bool support_160;
4340         u8 chains = 1;
4341
4342         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)
4343                 return chains;
4344
4345         ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
4346         if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
4347                 ht_cap = (void *)ht_cap_elem->data;
4348                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4349                 /*
4350                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4351                  *       "Tx Unequal Modulation Supported" fields.
4352                  */
4353         }
4354
4355         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
4356                 return chains;
4357
4358         vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
4359         if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
4360                 u8 nss;
4361                 u16 tx_mcs_map;
4362
4363                 vht_cap = (void *)vht_cap_elem->data;
4364                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4365                 for (nss = 8; nss > 0; nss--) {
4366                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4367                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4368                                 break;
4369                 }
4370                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4371                 chains = max(chains, nss);
4372         }
4373
4374         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE)
4375                 return chains;
4376
4377         ies = rcu_dereference(cbss->ies);
4378         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4379                                              ies->data, ies->len);
4380
4381         if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
4382                 return chains;
4383
4384         /* skip one byte ext_tag_id */
4385         he_cap = (void *)(he_cap_elem->data + 1);
4386         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4387
4388         /* invalid HE IE */
4389         if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
4390                 return chains;
4391
4392         /* mcs_nss is right after he_cap info */
4393         he_mcs_nss_supp = (void *)(he_cap + 1);
4394
4395         mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4396
4397         for (i = 7; i >= 0; i--) {
4398                 u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
4399
4400                 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4401                         chains = max_t(u8, chains, i + 1);
4402                         break;
4403                 }
4404         }
4405
4406         support_160 = he_cap->phy_cap_info[0] &
4407                       IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
4408
4409         if (!support_160)
4410                 return chains;
4411
4412         mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
4413         for (i = 7; i >= 0; i--) {
4414                 u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
4415
4416                 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4417                         chains = max_t(u8, chains, i + 1);
4418                         break;
4419                 }
4420         }
4421
4422         return chains;
4423 }
4424
4425 static bool
4426 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4427                                      const struct cfg80211_bss_ies *ies,
4428                                      const struct ieee80211_he_operation *he_op)
4429 {
4430         const struct element *he_cap_elem;
4431         const struct ieee80211_he_cap_elem *he_cap;
4432         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4433         u16 mcs_80_map_tx, mcs_80_map_rx;
4434         u16 ap_min_req_set;
4435         int mcs_nss_size;
4436         int nss;
4437
4438         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4439                                              ies->data, ies->len);
4440
4441         if (!he_cap_elem)
4442                 return false;
4443
4444         /* invalid HE IE */
4445         if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
4446                 sdata_info(sdata,
4447                            "Invalid HE elem, Disable HE\n");
4448                 return false;
4449         }
4450
4451         /* skip one byte ext_tag_id */
4452         he_cap = (void *)(he_cap_elem->data + 1);
4453         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4454
4455         /* invalid HE IE */
4456         if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
4457                 sdata_info(sdata,
4458                            "Invalid HE elem with nss size, Disable HE\n");
4459                 return false;
4460         }
4461
4462         /* mcs_nss is right after he_cap info */
4463         he_mcs_nss_supp = (void *)(he_cap + 1);
4464
4465         mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4466         mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
4467
4468         /* P802.11-REVme/D0.3
4469          * 27.1.1 Introduction to the HE PHY
4470          * ...
4471          * An HE STA shall support the following features:
4472          * ...
4473          * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
4474          * supported channel widths for HE SU PPDUs
4475          */
4476         if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4477             (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
4478                 sdata_info(sdata,
4479                            "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
4480                            mcs_80_map_tx, mcs_80_map_rx);
4481                 return false;
4482         }
4483
4484         if (!he_op)
4485                 return true;
4486
4487         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4488
4489         /*
4490          * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4491          * zeroes, which is nonsense, and completely inconsistent with itself
4492          * (it doesn't have 8 streams). Accept the settings in this case anyway.
4493          */
4494         if (!ap_min_req_set)
4495                 return true;
4496
4497         /* make sure the AP is consistent with itself
4498          *
4499          * P802.11-REVme/D0.3
4500          * 26.17.1 Basic HE BSS operation
4501          *
4502          * A STA that is operating in an HE BSS shall be able to receive and
4503          * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
4504          * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
4505          * MLME-START.request primitive and shall be able to receive at each of
4506          * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
4507          * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
4508          * primitive
4509          */
4510         for (nss = 8; nss > 0; nss--) {
4511                 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4512                 u8 ap_rx_val;
4513                 u8 ap_tx_val;
4514
4515                 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4516                         continue;
4517
4518                 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
4519                 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
4520
4521                 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4522                     ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4523                     ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
4524                         sdata_info(sdata,
4525                                    "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
4526                                    nss, ap_rx_val, ap_rx_val, ap_op_val);
4527                         return false;
4528                 }
4529         }
4530
4531         return true;
4532 }
4533
4534 static bool
4535 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4536                                     struct ieee80211_supported_band *sband,
4537                                     const struct ieee80211_he_operation *he_op)
4538 {
4539         const struct ieee80211_sta_he_cap *sta_he_cap =
4540                 ieee80211_get_he_iftype_cap(sband,
4541                                             ieee80211_vif_type_p2p(&sdata->vif));
4542         u16 ap_min_req_set;
4543         int i;
4544
4545         if (!sta_he_cap || !he_op)
4546                 return false;
4547
4548         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4549
4550         /*
4551          * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4552          * zeroes, which is nonsense, and completely inconsistent with itself
4553          * (it doesn't have 8 streams). Accept the settings in this case anyway.
4554          */
4555         if (!ap_min_req_set)
4556                 return true;
4557
4558         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4559         for (i = 0; i < 3; i++) {
4560                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4561                         &sta_he_cap->he_mcs_nss_supp;
4562                 u16 sta_mcs_map_rx =
4563                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4564                 u16 sta_mcs_map_tx =
4565                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4566                 u8 nss;
4567                 bool verified = true;
4568
4569                 /*
4570                  * For each band there is a maximum of 8 spatial streams
4571                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4572                  * of 2 bits per NSS (1-8), with the values defined in enum
4573                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4574                  * capabilities aren't less than the AP's minimum requirements
4575                  * for this HE BSS per SS.
4576                  * It is enough to find one such band that meets the reqs.
4577                  */
4578                 for (nss = 8; nss > 0; nss--) {
4579                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4580                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4581                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4582
4583                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4584                                 continue;
4585
4586                         /*
4587                          * Make sure the HE AP doesn't require MCSs that aren't
4588                          * supported by the client as required by spec
4589                          *
4590                          * P802.11-REVme/D0.3
4591                          * 26.17.1 Basic HE BSS operation
4592                          *
4593                          * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
4594                          * a BSS, unless it supports (i.e., is able to both transmit and
4595                          * receive using) all of the <HE-MCS, NSS> tuples in the basic
4596                          * HE-MCS and NSS set.
4597                          */
4598                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4599                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4600                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4601                                 verified = false;
4602                                 break;
4603                         }
4604                 }
4605
4606                 if (verified)
4607                         return true;
4608         }
4609
4610         /* If here, STA doesn't meet AP's HE min requirements */
4611         return false;
4612 }
4613
4614 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4615                                   struct ieee80211_link_data *link,
4616                                   struct cfg80211_bss *cbss,
4617                                   ieee80211_conn_flags_t *conn_flags)
4618 {
4619         struct ieee80211_local *local = sdata->local;
4620         const struct ieee80211_ht_cap *ht_cap = NULL;
4621         const struct ieee80211_ht_operation *ht_oper = NULL;
4622         const struct ieee80211_vht_operation *vht_oper = NULL;
4623         const struct ieee80211_he_operation *he_oper = NULL;
4624         const struct ieee80211_eht_operation *eht_oper = NULL;
4625         const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
4626         struct ieee80211_supported_band *sband;
4627         struct cfg80211_chan_def chandef;
4628         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4629         bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
4630         struct ieee80211_bss *bss = (void *)cbss->priv;
4631         struct ieee80211_elems_parse_params parse_params = {
4632                 .bss = cbss,
4633                 .link_id = -1,
4634                 .from_ap = true,
4635         };
4636         struct ieee802_11_elems *elems;
4637         const struct cfg80211_bss_ies *ies;
4638         int ret;
4639         u32 i;
4640         bool have_80mhz;
4641
4642         rcu_read_lock();
4643
4644         ies = rcu_dereference(cbss->ies);
4645         parse_params.start = ies->data;
4646         parse_params.len = ies->len;
4647         elems = ieee802_11_parse_elems_full(&parse_params);
4648         if (!elems) {
4649                 rcu_read_unlock();
4650                 return -ENOMEM;
4651         }
4652
4653         sband = local->hw.wiphy->bands[cbss->channel->band];
4654
4655         *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ |
4656                          IEEE80211_CONN_DISABLE_80P80MHZ |
4657                          IEEE80211_CONN_DISABLE_160MHZ);
4658
4659         /* disable HT/VHT/HE if we don't support them */
4660         if (!sband->ht_cap.ht_supported && !is_6ghz) {
4661                 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
4662                 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4663                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4664                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4665                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4666         }
4667
4668         if (!sband->vht_cap.vht_supported && is_5ghz) {
4669                 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
4670                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4671                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4672                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4673         }
4674
4675         if (!ieee80211_get_he_iftype_cap(sband,
4676                                          ieee80211_vif_type_p2p(&sdata->vif))) {
4677                 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
4678                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4679                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4680         }
4681
4682         if (!ieee80211_get_eht_iftype_cap(sband,
4683                                           ieee80211_vif_type_p2p(&sdata->vif))) {
4684                 mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
4685                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4686         }
4687
4688         if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) {
4689                 ht_oper = elems->ht_operation;
4690                 ht_cap = elems->ht_cap_elem;
4691
4692                 if (!ht_cap) {
4693                         *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4694                         ht_oper = NULL;
4695                 }
4696         }
4697
4698         if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) {
4699                 vht_oper = elems->vht_operation;
4700                 if (vht_oper && !ht_oper) {
4701                         vht_oper = NULL;
4702                         sdata_info(sdata,
4703                                    "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4704                         *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4705                         *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4706                         *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4707                         *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4708                 }
4709
4710                 if (!elems->vht_cap_elem) {
4711                         *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4712                         vht_oper = NULL;
4713                 }
4714         }
4715
4716         if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) {
4717                 he_oper = elems->he_operation;
4718
4719                 if (link && is_6ghz) {
4720                         struct ieee80211_bss_conf *bss_conf;
4721                         u8 j = 0;
4722
4723                         bss_conf = link->conf;
4724
4725                         if (elems->pwr_constr_elem)
4726                                 bss_conf->pwr_reduction = *elems->pwr_constr_elem;
4727
4728                         BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
4729                                      ARRAY_SIZE(elems->tx_pwr_env));
4730
4731                         for (i = 0; i < elems->tx_pwr_env_num; i++) {
4732                                 if (elems->tx_pwr_env_len[i] >
4733                                     sizeof(bss_conf->tx_pwr_env[j]))
4734                                         continue;
4735
4736                                 bss_conf->tx_pwr_env_num++;
4737                                 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
4738                                        elems->tx_pwr_env_len[i]);
4739                                 j++;
4740                         }
4741                 }
4742
4743                 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
4744                     !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
4745                         *conn_flags |= IEEE80211_CONN_DISABLE_HE |
4746                                        IEEE80211_CONN_DISABLE_EHT;
4747         }
4748
4749         /*
4750          * EHT requires HE to be supported as well. Specifically for 6 GHz
4751          * channels, the operation channel information can only be deduced from
4752          * both the 6 GHz operation information (from the HE operation IE) and
4753          * EHT operation.
4754          */
4755         if (!(*conn_flags &
4756                         (IEEE80211_CONN_DISABLE_HE |
4757                          IEEE80211_CONN_DISABLE_EHT)) &&
4758             he_oper) {
4759                 const struct cfg80211_bss_ies *cbss_ies;
4760                 const u8 *eht_oper_ie;
4761
4762                 cbss_ies = rcu_dereference(cbss->ies);
4763                 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
4764                                                    cbss_ies->data, cbss_ies->len);
4765                 if (eht_oper_ie && eht_oper_ie[1] >=
4766                     1 + sizeof(struct ieee80211_eht_operation))
4767                         eht_oper = (void *)(eht_oper_ie + 3);
4768                 else
4769                         eht_oper = NULL;
4770         }
4771
4772         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4773         have_80mhz = false;
4774         for (i = 0; i < sband->n_channels; i++) {
4775                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4776                                                 IEEE80211_CHAN_NO_80MHZ))
4777                         continue;
4778
4779                 have_80mhz = true;
4780                 break;
4781         }
4782
4783         if (!have_80mhz) {
4784                 sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
4785                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4786         }
4787
4788         if (sband->band == NL80211_BAND_S1GHZ) {
4789                 s1g_oper = elems->s1g_oper;
4790                 if (!s1g_oper)
4791                         sdata_info(sdata,
4792                                    "AP missing S1G operation element?\n");
4793         }
4794
4795         *conn_flags |=
4796                 ieee80211_determine_chantype(sdata, link, *conn_flags,
4797                                              sband,
4798                                              cbss->channel,
4799                                              bss->vht_cap_info,
4800                                              ht_oper, vht_oper,
4801                                              he_oper, eht_oper,
4802                                              s1g_oper,
4803                                              &chandef, false);
4804
4805         if (link)
4806                 link->needed_rx_chains =
4807                         min(ieee80211_max_rx_chains(link, cbss),
4808                             local->rx_chains);
4809
4810         rcu_read_unlock();
4811         /* the element data was RCU protected so no longer valid anyway */
4812         kfree(elems);
4813         elems = NULL;
4814
4815         if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) {
4816                 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
4817                 return -EINVAL;
4818         }
4819
4820         if (!link)
4821                 return 0;
4822
4823         /* will change later if needed */
4824         link->smps_mode = IEEE80211_SMPS_OFF;
4825
4826         mutex_lock(&local->mtx);
4827         /*
4828          * If this fails (possibly due to channel context sharing
4829          * on incompatible channels, e.g. 80+80 and 160 sharing the
4830          * same control channel) try to use a smaller bandwidth.
4831          */
4832         ret = ieee80211_link_use_channel(link, &chandef,
4833                                          IEEE80211_CHANCTX_SHARED);
4834
4835         /* don't downgrade for 5 and 10 MHz channels, though. */
4836         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4837             chandef.width == NL80211_CHAN_WIDTH_10)
4838                 goto out;
4839
4840         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4841                 *conn_flags |=
4842                         ieee80211_chandef_downgrade(&chandef);
4843                 ret = ieee80211_link_use_channel(link, &chandef,
4844                                                  IEEE80211_CHANCTX_SHARED);
4845         }
4846  out:
4847         mutex_unlock(&local->mtx);
4848         return ret;
4849 }
4850
4851 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4852                                u8 *dtim_count, u8 *dtim_period)
4853 {
4854         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4855         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4856                                          ies->len);
4857         const struct ieee80211_tim_ie *tim = NULL;
4858         const struct ieee80211_bssid_index *idx;
4859         bool valid = tim_ie && tim_ie[1] >= 2;
4860
4861         if (valid)
4862                 tim = (void *)(tim_ie + 2);
4863
4864         if (dtim_count)
4865                 *dtim_count = valid ? tim->dtim_count : 0;
4866
4867         if (dtim_period)
4868                 *dtim_period = valid ? tim->dtim_period : 0;
4869
4870         /* Check if value is overridden by non-transmitted profile */
4871         if (!idx_ie || idx_ie[1] < 3)
4872                 return valid;
4873
4874         idx = (void *)(idx_ie + 2);
4875
4876         if (dtim_count)
4877                 *dtim_count = idx->dtim_count;
4878
4879         if (dtim_period)
4880                 *dtim_period = idx->dtim_period;
4881
4882         return true;
4883 }
4884
4885 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
4886                                     struct ieee80211_mgmt *mgmt,
4887                                     struct ieee802_11_elems *elems,
4888                                     const u8 *elem_start, unsigned int elem_len)
4889 {
4890         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4891         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
4892         struct ieee80211_local *local = sdata->local;
4893         unsigned int link_id;
4894         struct sta_info *sta;
4895         u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
4896         int err;
4897
4898         mutex_lock(&sdata->local->sta_mtx);
4899         /*
4900          * station info was already allocated and inserted before
4901          * the association and should be available to us
4902          */
4903         sta = sta_info_get(sdata, assoc_data->ap_addr);
4904         if (WARN_ON(!sta))
4905                 goto out_err;
4906
4907         if (sdata->vif.valid_links) {
4908                 u16 valid_links = 0;
4909
4910                 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4911                         if (!assoc_data->link[link_id].bss)
4912                                 continue;
4913                         valid_links |= BIT(link_id);
4914
4915                         if (link_id != assoc_data->assoc_link_id) {
4916                                 err = ieee80211_sta_allocate_link(sta, link_id);
4917                                 if (err)
4918                                         goto out_err;
4919                         }
4920                 }
4921
4922                 ieee80211_vif_set_links(sdata, valid_links);
4923         }
4924
4925         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4926                 struct ieee80211_link_data *link;
4927                 struct link_sta_info *link_sta;
4928
4929                 if (!assoc_data->link[link_id].bss)
4930                         continue;
4931
4932                 link = sdata_dereference(sdata->link[link_id], sdata);
4933                 if (WARN_ON(!link))
4934                         goto out_err;
4935
4936                 if (sdata->vif.valid_links)
4937                         link_info(link,
4938                                   "local address %pM, AP link address %pM\n",
4939                                   link->conf->addr,
4940                                   assoc_data->link[link_id].bss->bssid);
4941
4942                 link_sta = rcu_dereference_protected(sta->link[link_id],
4943                                                      lockdep_is_held(&local->sta_mtx));
4944                 if (WARN_ON(!link_sta))
4945                         goto out_err;
4946
4947                 if (link_id != assoc_data->assoc_link_id) {
4948                         struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
4949                         const struct cfg80211_bss_ies *ies;
4950
4951                         rcu_read_lock();
4952                         ies = rcu_dereference(cbss->ies);
4953                         ieee80211_get_dtim(ies,
4954                                            &link->conf->sync_dtim_count,
4955                                            &link->u.mgd.dtim_period);
4956                         link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
4957                         link->conf->beacon_int = cbss->beacon_interval;
4958                         rcu_read_unlock();
4959
4960                         err = ieee80211_prep_channel(sdata, link, cbss,
4961                                                      &link->u.mgd.conn_flags);
4962                         if (err) {
4963                                 link_info(link, "prep_channel failed\n");
4964                                 goto out_err;
4965                         }
4966                 }
4967
4968                 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
4969                                                    assoc_data->link[link_id].bss);
4970                 if (err)
4971                         goto out_err;
4972
4973                 if (!ieee80211_assoc_config_link(link, link_sta,
4974                                                  assoc_data->link[link_id].bss,
4975                                                  mgmt, elem_start, elem_len,
4976                                                  &changed[link_id]))
4977                         goto out_err;
4978
4979                 if (link_id != assoc_data->assoc_link_id) {
4980                         err = ieee80211_sta_activate_link(sta, link_id);
4981                         if (err)
4982                                 goto out_err;
4983                 }
4984         }
4985
4986         rate_control_rate_init(sta);
4987
4988         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
4989                 set_sta_flag(sta, WLAN_STA_MFP);
4990                 sta->sta.mfp = true;
4991         } else {
4992                 sta->sta.mfp = false;
4993         }
4994
4995         ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab,
4996                                               elems->ext_capab_len);
4997
4998         sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
4999                        local->hw.queues >= IEEE80211_NUM_ACS;
5000
5001         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
5002         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
5003                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
5004         if (err) {
5005                 sdata_info(sdata,
5006                            "failed to move station %pM to desired state\n",
5007                            sta->sta.addr);
5008                 WARN_ON(__sta_info_destroy(sta));
5009                 goto out_err;
5010         }
5011
5012         if (sdata->wdev.use_4addr)
5013                 drv_sta_set_4addr(local, sdata, &sta->sta, true);
5014
5015         mutex_unlock(&sdata->local->sta_mtx);
5016
5017         ieee80211_set_associated(sdata, assoc_data, changed);
5018
5019         /*
5020          * If we're using 4-addr mode, let the AP know that we're
5021          * doing so, so that it can create the STA VLAN on its side
5022          */
5023         if (ifmgd->use_4addr)
5024                 ieee80211_send_4addr_nullfunc(local, sdata);
5025
5026         /*
5027          * Start timer to probe the connection to the AP now.
5028          * Also start the timer that will detect beacon loss.
5029          */
5030         ieee80211_sta_reset_beacon_monitor(sdata);
5031         ieee80211_sta_reset_conn_monitor(sdata);
5032
5033         return true;
5034 out_err:
5035         eth_zero_addr(sdata->vif.cfg.ap_addr);
5036         mutex_unlock(&sdata->local->sta_mtx);
5037         return false;
5038 }
5039
5040 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
5041                                          struct ieee80211_mgmt *mgmt,
5042                                          size_t len)
5043 {
5044         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5045         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5046         u16 capab_info, status_code, aid;
5047         struct ieee80211_elems_parse_params parse_params = {
5048                 .bss = NULL,
5049                 .link_id = -1,
5050                 .from_ap = true,
5051         };
5052         struct ieee802_11_elems *elems;
5053         int ac;
5054         const u8 *elem_start;
5055         unsigned int elem_len;
5056         bool reassoc;
5057         struct ieee80211_event event = {
5058                 .type = MLME_EVENT,
5059                 .u.mlme.data = ASSOC_EVENT,
5060         };
5061         struct ieee80211_prep_tx_info info = {};
5062         struct cfg80211_rx_assoc_resp resp = {
5063                 .uapsd_queues = -1,
5064         };
5065         u8 ap_mld_addr[ETH_ALEN] __aligned(2);
5066         unsigned int link_id;
5067
5068         sdata_assert_lock(sdata);
5069
5070         if (!assoc_data)
5071                 return;
5072
5073         if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) ||
5074             !ether_addr_equal(assoc_data->ap_addr, mgmt->sa))
5075                 return;
5076
5077         /*
5078          * AssocResp and ReassocResp have identical structure, so process both
5079          * of them in this function.
5080          */
5081
5082         if (len < 24 + 6)
5083                 return;
5084
5085         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
5086         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
5087         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
5088         if (assoc_data->s1g)
5089                 elem_start = mgmt->u.s1g_assoc_resp.variable;
5090         else
5091                 elem_start = mgmt->u.assoc_resp.variable;
5092
5093         /*
5094          * Note: this may not be perfect, AP might misbehave - if
5095          * anyone needs to rely on perfect complete notification
5096          * with the exact right subtype, then we need to track what
5097          * we actually transmitted.
5098          */
5099         info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
5100                                  IEEE80211_STYPE_ASSOC_REQ;
5101
5102         if (assoc_data->fils_kek_len &&
5103             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
5104                 return;
5105
5106         elem_len = len - (elem_start - (u8 *)mgmt);
5107         parse_params.start = elem_start;
5108         parse_params.len = elem_len;
5109         elems = ieee802_11_parse_elems_full(&parse_params);
5110         if (!elems)
5111                 goto notify_driver;
5112
5113         if (elems->aid_resp)
5114                 aid = le16_to_cpu(elems->aid_resp->aid);
5115         else if (assoc_data->s1g)
5116                 aid = 0; /* TODO */
5117         else
5118                 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
5119
5120         /*
5121          * The 5 MSB of the AID field are reserved
5122          * (802.11-2016 9.4.1.8 AID field)
5123          */
5124         aid &= 0x7ff;
5125
5126         sdata_info(sdata,
5127                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
5128                    reassoc ? "Rea" : "A", assoc_data->ap_addr,
5129                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
5130
5131         ifmgd->broken_ap = false;
5132
5133         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
5134             elems->timeout_int &&
5135             elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
5136                 u32 tu, ms;
5137
5138                 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr,
5139                                         le32_to_cpu(elems->timeout_int->value));
5140
5141                 tu = le32_to_cpu(elems->timeout_int->value);
5142                 ms = tu * 1024 / 1000;
5143                 sdata_info(sdata,
5144                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
5145                            assoc_data->ap_addr, tu, ms);
5146                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
5147                 assoc_data->timeout_started = true;
5148                 if (ms > IEEE80211_ASSOC_TIMEOUT)
5149                         run_again(sdata, assoc_data->timeout);
5150                 goto notify_driver;
5151         }
5152
5153         if (status_code != WLAN_STATUS_SUCCESS) {
5154                 sdata_info(sdata, "%pM denied association (code=%d)\n",
5155                            assoc_data->ap_addr, status_code);
5156                 event.u.mlme.status = MLME_DENIED;
5157                 event.u.mlme.reason = status_code;
5158                 drv_event_callback(sdata->local, sdata, &event);
5159         } else {
5160                 if (aid == 0 || aid > IEEE80211_MAX_AID) {
5161                         sdata_info(sdata,
5162                                    "invalid AID value %d (out of range), turn off PS\n",
5163                                    aid);
5164                         aid = 0;
5165                         ifmgd->broken_ap = true;
5166                 }
5167
5168                 if (sdata->vif.valid_links) {
5169                         if (!elems->multi_link) {
5170                                 sdata_info(sdata,
5171                                            "MLO association with %pM but no multi-link element in response!\n",
5172                                            assoc_data->ap_addr);
5173                                 goto abandon_assoc;
5174                         }
5175
5176                         if (le16_get_bits(elems->multi_link->control,
5177                                           IEEE80211_ML_CONTROL_TYPE) !=
5178                                         IEEE80211_ML_CONTROL_TYPE_BASIC) {
5179                                 sdata_info(sdata,
5180                                            "bad multi-link element (control=0x%x)\n",
5181                                            le16_to_cpu(elems->multi_link->control));
5182                                 goto abandon_assoc;
5183                         } else {
5184                                 struct ieee80211_mle_basic_common_info *common;
5185
5186                                 common = (void *)elems->multi_link->variable;
5187
5188                                 if (memcmp(assoc_data->ap_addr,
5189                                            common->mld_mac_addr, ETH_ALEN)) {
5190                                         sdata_info(sdata,
5191                                                    "AP MLD MAC address mismatch: got %pM expected %pM\n",
5192                                                    common->mld_mac_addr,
5193                                                    assoc_data->ap_addr);
5194                                         goto abandon_assoc;
5195                                 }
5196                         }
5197                 }
5198
5199                 sdata->vif.cfg.aid = aid;
5200
5201                 if (!ieee80211_assoc_success(sdata, mgmt, elems,
5202                                              elem_start, elem_len)) {
5203                         /* oops -- internal error -- send timeout for now */
5204                         ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
5205                         goto notify_driver;
5206                 }
5207                 event.u.mlme.status = MLME_SUCCESS;
5208                 drv_event_callback(sdata->local, sdata, &event);
5209                 sdata_info(sdata, "associated\n");
5210
5211                 info.success = 1;
5212         }
5213
5214         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5215                 struct ieee80211_link_data *link;
5216
5217                 link = sdata_dereference(sdata->link[link_id], sdata);
5218                 if (!link)
5219                         continue;
5220                 if (!assoc_data->link[link_id].bss)
5221                         continue;
5222                 resp.links[link_id].bss = assoc_data->link[link_id].bss;
5223                 resp.links[link_id].addr = link->conf->addr;
5224
5225                 /* get uapsd queues configuration - same for all links */
5226                 resp.uapsd_queues = 0;
5227                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
5228                         if (link->tx_conf[ac].uapsd)
5229                                 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
5230         }
5231
5232         if (sdata->vif.valid_links) {
5233                 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr);
5234                 resp.ap_mld_addr = ap_mld_addr;
5235         }
5236
5237         ieee80211_destroy_assoc_data(sdata,
5238                                      status_code == WLAN_STATUS_SUCCESS ?
5239                                         ASSOC_SUCCESS :
5240                                         ASSOC_REJECTED);
5241
5242         resp.buf = (u8 *)mgmt;
5243         resp.len = len;
5244         resp.req_ies = ifmgd->assoc_req_ies;
5245         resp.req_ies_len = ifmgd->assoc_req_ies_len;
5246         cfg80211_rx_assoc_resp(sdata->dev, &resp);
5247 notify_driver:
5248         drv_mgd_complete_tx(sdata->local, sdata, &info);
5249         kfree(elems);
5250         return;
5251 abandon_assoc:
5252         ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
5253         goto notify_driver;
5254 }
5255
5256 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
5257                                   struct ieee80211_mgmt *mgmt, size_t len,
5258                                   struct ieee80211_rx_status *rx_status)
5259 {
5260         struct ieee80211_sub_if_data *sdata = link->sdata;
5261         struct ieee80211_local *local = sdata->local;
5262         struct ieee80211_bss *bss;
5263         struct ieee80211_channel *channel;
5264
5265         sdata_assert_lock(sdata);
5266
5267         channel = ieee80211_get_channel_khz(local->hw.wiphy,
5268                                         ieee80211_rx_status_to_khz(rx_status));
5269         if (!channel)
5270                 return;
5271
5272         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
5273         if (bss) {
5274                 link->conf->beacon_rate = bss->beacon_rate;
5275                 ieee80211_rx_bss_put(local, bss);
5276         }
5277 }
5278
5279
5280 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
5281                                          struct sk_buff *skb)
5282 {
5283         struct ieee80211_sub_if_data *sdata = link->sdata;
5284         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5285         struct ieee80211_if_managed *ifmgd;
5286         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
5287         struct ieee80211_channel *channel;
5288         size_t baselen, len = skb->len;
5289
5290         ifmgd = &sdata->u.mgd;
5291
5292         sdata_assert_lock(sdata);
5293
5294         /*
5295          * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
5296          * "If a 6 GHz AP receives a Probe Request frame  and responds with
5297          * a Probe Response frame [..], the Address 1 field of the Probe
5298          * Response frame shall be set to the broadcast address [..]"
5299          * So, on 6GHz band we should also accept broadcast responses.
5300          */
5301         channel = ieee80211_get_channel(sdata->local->hw.wiphy,
5302                                         rx_status->freq);
5303         if (!channel)
5304                 return;
5305
5306         if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
5307             (channel->band != NL80211_BAND_6GHZ ||
5308              !is_broadcast_ether_addr(mgmt->da)))
5309                 return; /* ignore ProbeResp to foreign address */
5310
5311         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
5312         if (baselen > len)
5313                 return;
5314
5315         ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5316
5317         if (ifmgd->associated &&
5318             ether_addr_equal(mgmt->bssid, link->u.mgd.bssid))
5319                 ieee80211_reset_ap_probe(sdata);
5320 }
5321
5322 /*
5323  * This is the canonical list of information elements we care about,
5324  * the filter code also gives us all changes to the Microsoft OUI
5325  * (00:50:F2) vendor IE which is used for WMM which we need to track,
5326  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
5327  * changes to requested client power.
5328  *
5329  * We implement beacon filtering in software since that means we can
5330  * avoid processing the frame here and in cfg80211, and userspace
5331  * will not be able to tell whether the hardware supports it or not.
5332  *
5333  * XXX: This list needs to be dynamic -- userspace needs to be able to
5334  *      add items it requires. It also needs to be able to tell us to
5335  *      look out for other vendor IEs.
5336  */
5337 static const u64 care_about_ies =
5338         (1ULL << WLAN_EID_COUNTRY) |
5339         (1ULL << WLAN_EID_ERP_INFO) |
5340         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
5341         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
5342         (1ULL << WLAN_EID_HT_CAPABILITY) |
5343         (1ULL << WLAN_EID_HT_OPERATION) |
5344         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
5345
5346 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
5347                                         struct ieee80211_if_managed *ifmgd,
5348                                         struct ieee80211_bss_conf *bss_conf,
5349                                         struct ieee80211_local *local,
5350                                         struct ieee80211_rx_status *rx_status)
5351 {
5352         struct ieee80211_sub_if_data *sdata = link->sdata;
5353
5354         /* Track average RSSI from the Beacon frames of the current AP */
5355
5356         if (!link->u.mgd.tracking_signal_avg) {
5357                 link->u.mgd.tracking_signal_avg = true;
5358                 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal);
5359                 link->u.mgd.last_cqm_event_signal = 0;
5360                 link->u.mgd.count_beacon_signal = 1;
5361                 link->u.mgd.last_ave_beacon_signal = 0;
5362         } else {
5363                 link->u.mgd.count_beacon_signal++;
5364         }
5365
5366         ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal,
5367                                -rx_status->signal);
5368
5369         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
5370             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5371                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5372                 int last_sig = link->u.mgd.last_ave_beacon_signal;
5373                 struct ieee80211_event event = {
5374                         .type = RSSI_EVENT,
5375                 };
5376
5377                 /*
5378                  * if signal crosses either of the boundaries, invoke callback
5379                  * with appropriate parameters
5380                  */
5381                 if (sig > ifmgd->rssi_max_thold &&
5382                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
5383                         link->u.mgd.last_ave_beacon_signal = sig;
5384                         event.u.rssi.data = RSSI_EVENT_HIGH;
5385                         drv_event_callback(local, sdata, &event);
5386                 } else if (sig < ifmgd->rssi_min_thold &&
5387                            (last_sig >= ifmgd->rssi_max_thold ||
5388                            last_sig == 0)) {
5389                         link->u.mgd.last_ave_beacon_signal = sig;
5390                         event.u.rssi.data = RSSI_EVENT_LOW;
5391                         drv_event_callback(local, sdata, &event);
5392                 }
5393         }
5394
5395         if (bss_conf->cqm_rssi_thold &&
5396             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
5397             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
5398                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5399                 int last_event = link->u.mgd.last_cqm_event_signal;
5400                 int thold = bss_conf->cqm_rssi_thold;
5401                 int hyst = bss_conf->cqm_rssi_hyst;
5402
5403                 if (sig < thold &&
5404                     (last_event == 0 || sig < last_event - hyst)) {
5405                         link->u.mgd.last_cqm_event_signal = sig;
5406                         ieee80211_cqm_rssi_notify(
5407                                 &sdata->vif,
5408                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5409                                 sig, GFP_KERNEL);
5410                 } else if (sig > thold &&
5411                            (last_event == 0 || sig > last_event + hyst)) {
5412                         link->u.mgd.last_cqm_event_signal = sig;
5413                         ieee80211_cqm_rssi_notify(
5414                                 &sdata->vif,
5415                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5416                                 sig, GFP_KERNEL);
5417                 }
5418         }
5419
5420         if (bss_conf->cqm_rssi_low &&
5421             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5422                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5423                 int last_event = link->u.mgd.last_cqm_event_signal;
5424                 int low = bss_conf->cqm_rssi_low;
5425                 int high = bss_conf->cqm_rssi_high;
5426
5427                 if (sig < low &&
5428                     (last_event == 0 || last_event >= low)) {
5429                         link->u.mgd.last_cqm_event_signal = sig;
5430                         ieee80211_cqm_rssi_notify(
5431                                 &sdata->vif,
5432                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5433                                 sig, GFP_KERNEL);
5434                 } else if (sig > high &&
5435                            (last_event == 0 || last_event <= high)) {
5436                         link->u.mgd.last_cqm_event_signal = sig;
5437                         ieee80211_cqm_rssi_notify(
5438                                 &sdata->vif,
5439                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5440                                 sig, GFP_KERNEL);
5441                 }
5442         }
5443 }
5444
5445 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
5446                                     struct cfg80211_bss *bss)
5447 {
5448         if (ether_addr_equal(tx_bssid, bss->bssid))
5449                 return true;
5450         if (!bss->transmitted_bss)
5451                 return false;
5452         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
5453 }
5454
5455 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
5456                                      struct ieee80211_hdr *hdr, size_t len,
5457                                      struct ieee80211_rx_status *rx_status)
5458 {
5459         struct ieee80211_sub_if_data *sdata = link->sdata;
5460         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5461         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5462         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
5463         struct ieee80211_mgmt *mgmt = (void *) hdr;
5464         size_t baselen;
5465         struct ieee802_11_elems *elems;
5466         struct ieee80211_local *local = sdata->local;
5467         struct ieee80211_chanctx_conf *chanctx_conf;
5468         struct ieee80211_channel *chan;
5469         struct link_sta_info *link_sta;
5470         struct sta_info *sta;
5471         u32 changed = 0;
5472         bool erp_valid;
5473         u8 erp_value = 0;
5474         u32 ncrc = 0;
5475         u8 *bssid, *variable = mgmt->u.beacon.variable;
5476         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
5477         struct ieee80211_elems_parse_params parse_params = {
5478                 .link_id = -1,
5479                 .from_ap = true,
5480         };
5481
5482         sdata_assert_lock(sdata);
5483
5484         /* Process beacon from the current BSS */
5485         bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
5486         if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
5487                 struct ieee80211_ext *ext = (void *) mgmt;
5488
5489                 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
5490                         variable = ext->u.s1g_short_beacon.variable;
5491                 else
5492                         variable = ext->u.s1g_beacon.variable;
5493         }
5494
5495         baselen = (u8 *) variable - (u8 *) mgmt;
5496         if (baselen > len)
5497                 return;
5498
5499         parse_params.start = variable;
5500         parse_params.len = len - baselen;
5501
5502         rcu_read_lock();
5503         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
5504         if (!chanctx_conf) {
5505                 rcu_read_unlock();
5506                 return;
5507         }
5508
5509         if (ieee80211_rx_status_to_khz(rx_status) !=
5510             ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
5511                 rcu_read_unlock();
5512                 return;
5513         }
5514         chan = chanctx_conf->def.chan;
5515         rcu_read_unlock();
5516
5517         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
5518             !WARN_ON(sdata->vif.valid_links) &&
5519             ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) {
5520                 parse_params.bss = ifmgd->assoc_data->link[0].bss;
5521                 elems = ieee802_11_parse_elems_full(&parse_params);
5522                 if (!elems)
5523                         return;
5524
5525                 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5526
5527                 if (elems->dtim_period)
5528                         link->u.mgd.dtim_period = elems->dtim_period;
5529                 link->u.mgd.have_beacon = true;
5530                 ifmgd->assoc_data->need_beacon = false;
5531                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5532                         link->conf->sync_tsf =
5533                                 le64_to_cpu(mgmt->u.beacon.timestamp);
5534                         link->conf->sync_device_ts =
5535                                 rx_status->device_timestamp;
5536                         link->conf->sync_dtim_count = elems->dtim_count;
5537                 }
5538
5539                 if (elems->mbssid_config_ie)
5540                         bss_conf->profile_periodicity =
5541                                 elems->mbssid_config_ie->profile_periodicity;
5542                 else
5543                         bss_conf->profile_periodicity = 0;
5544
5545                 if (elems->ext_capab_len >= 11 &&
5546                     (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5547                         bss_conf->ema_ap = true;
5548                 else
5549                         bss_conf->ema_ap = false;
5550
5551                 /* continue assoc process */
5552                 ifmgd->assoc_data->timeout = jiffies;
5553                 ifmgd->assoc_data->timeout_started = true;
5554                 run_again(sdata, ifmgd->assoc_data->timeout);
5555                 kfree(elems);
5556                 return;
5557         }
5558
5559         if (!ifmgd->associated ||
5560             !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss))
5561                 return;
5562         bssid = link->u.mgd.bssid;
5563
5564         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
5565                 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
5566                                             local, rx_status);
5567
5568         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
5569                 mlme_dbg_ratelimited(sdata,
5570                                      "cancelling AP probe due to a received beacon\n");
5571                 ieee80211_reset_ap_probe(sdata);
5572         }
5573
5574         /*
5575          * Push the beacon loss detection into the future since
5576          * we are processing a beacon from the AP just now.
5577          */
5578         ieee80211_sta_reset_beacon_monitor(sdata);
5579
5580         /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
5581          * element (which carries the beacon interval). Don't forget to add a
5582          * bit to care_about_ies[] above if mac80211 is interested in a
5583          * changing S1G element.
5584          */
5585         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5586                 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
5587         parse_params.bss = link->u.mgd.bss;
5588         parse_params.filter = care_about_ies;
5589         parse_params.crc = ncrc;
5590         elems = ieee802_11_parse_elems_full(&parse_params);
5591         if (!elems)
5592                 return;
5593         ncrc = elems->crc;
5594
5595         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
5596             ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) {
5597                 if (local->hw.conf.dynamic_ps_timeout > 0) {
5598                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
5599                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
5600                                 ieee80211_hw_config(local,
5601                                                     IEEE80211_CONF_CHANGE_PS);
5602                         }
5603                         ieee80211_send_nullfunc(local, sdata, false);
5604                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
5605                         local->pspolling = true;
5606
5607                         /*
5608                          * Here is assumed that the driver will be
5609                          * able to send ps-poll frame and receive a
5610                          * response even though power save mode is
5611                          * enabled, but some drivers might require
5612                          * to disable power save here. This needs
5613                          * to be investigated.
5614                          */
5615                         ieee80211_send_pspoll(local, sdata);
5616                 }
5617         }
5618
5619         if (sdata->vif.p2p ||
5620             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
5621                 struct ieee80211_p2p_noa_attr noa = {};
5622                 int ret;
5623
5624                 ret = cfg80211_get_p2p_attr(variable,
5625                                             len - baselen,
5626                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
5627                                             (u8 *) &noa, sizeof(noa));
5628                 if (ret >= 2) {
5629                         if (link->u.mgd.p2p_noa_index != noa.index) {
5630                                 /* valid noa_attr and index changed */
5631                                 link->u.mgd.p2p_noa_index = noa.index;
5632                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
5633                                 changed |= BSS_CHANGED_P2P_PS;
5634                                 /*
5635                                  * make sure we update all information, the CRC
5636                                  * mechanism doesn't look at P2P attributes.
5637                                  */
5638                                 link->u.mgd.beacon_crc_valid = false;
5639                         }
5640                 } else if (link->u.mgd.p2p_noa_index != -1) {
5641                         /* noa_attr not found and we had valid noa_attr before */
5642                         link->u.mgd.p2p_noa_index = -1;
5643                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
5644                         changed |= BSS_CHANGED_P2P_PS;
5645                         link->u.mgd.beacon_crc_valid = false;
5646                 }
5647         }
5648
5649         if (link->u.mgd.csa_waiting_bcn)
5650                 ieee80211_chswitch_post_beacon(link);
5651
5652         /*
5653          * Update beacon timing and dtim count on every beacon appearance. This
5654          * will allow the driver to use the most updated values. Do it before
5655          * comparing this one with last received beacon.
5656          * IMPORTANT: These parameters would possibly be out of sync by the time
5657          * the driver will use them. The synchronized view is currently
5658          * guaranteed only in certain callbacks.
5659          */
5660         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
5661             !ieee80211_is_s1g_beacon(hdr->frame_control)) {
5662                 link->conf->sync_tsf =
5663                         le64_to_cpu(mgmt->u.beacon.timestamp);
5664                 link->conf->sync_device_ts =
5665                         rx_status->device_timestamp;
5666                 link->conf->sync_dtim_count = elems->dtim_count;
5667         }
5668
5669         if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) ||
5670             ieee80211_is_s1g_short_beacon(mgmt->frame_control))
5671                 goto free;
5672         link->u.mgd.beacon_crc = ncrc;
5673         link->u.mgd.beacon_crc_valid = true;
5674
5675         ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5676
5677         ieee80211_sta_process_chanswitch(link, rx_status->mactime,
5678                                          rx_status->device_timestamp,
5679                                          elems, true);
5680
5681         if (!link->u.mgd.disable_wmm_tracking &&
5682             ieee80211_sta_wmm_params(local, link, elems->wmm_param,
5683                                      elems->wmm_param_len,
5684                                      elems->mu_edca_param_set))
5685                 changed |= BSS_CHANGED_QOS;
5686
5687         /*
5688          * If we haven't had a beacon before, tell the driver about the
5689          * DTIM period (and beacon timing if desired) now.
5690          */
5691         if (!link->u.mgd.have_beacon) {
5692                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
5693                 bss_conf->dtim_period = elems->dtim_period ?: 1;
5694
5695                 changed |= BSS_CHANGED_BEACON_INFO;
5696                 link->u.mgd.have_beacon = true;
5697
5698                 mutex_lock(&local->iflist_mtx);
5699                 ieee80211_recalc_ps(local);
5700                 mutex_unlock(&local->iflist_mtx);
5701
5702                 ieee80211_recalc_ps_vif(sdata);
5703         }
5704
5705         if (elems->erp_info) {
5706                 erp_valid = true;
5707                 erp_value = elems->erp_info[0];
5708         } else {
5709                 erp_valid = false;
5710         }
5711
5712         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5713                 changed |= ieee80211_handle_bss_capability(link,
5714                                 le16_to_cpu(mgmt->u.beacon.capab_info),
5715                                 erp_valid, erp_value);
5716
5717         mutex_lock(&local->sta_mtx);
5718         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
5719         if (WARN_ON(!sta)) {
5720                 mutex_unlock(&local->sta_mtx);
5721                 goto free;
5722         }
5723         link_sta = rcu_dereference_protected(sta->link[link->link_id],
5724                                              lockdep_is_held(&local->sta_mtx));
5725         if (WARN_ON(!link_sta)) {
5726                 mutex_unlock(&local->sta_mtx);
5727                 goto free;
5728         }
5729
5730         changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
5731
5732         if (ieee80211_config_bw(link, elems->ht_cap_elem,
5733                                 elems->vht_cap_elem, elems->ht_operation,
5734                                 elems->vht_operation, elems->he_operation,
5735                                 elems->eht_operation,
5736                                 elems->s1g_oper, bssid, &changed)) {
5737                 mutex_unlock(&local->sta_mtx);
5738                 sdata_info(sdata,
5739                            "failed to follow AP %pM bandwidth change, disconnect\n",
5740                            bssid);
5741                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5742                                        WLAN_REASON_DEAUTH_LEAVING,
5743                                        true, deauth_buf);
5744                 ieee80211_report_disconnect(sdata, deauth_buf,
5745                                             sizeof(deauth_buf), true,
5746                                             WLAN_REASON_DEAUTH_LEAVING,
5747                                             false);
5748                 goto free;
5749         }
5750
5751         if (sta && elems->opmode_notif)
5752                 ieee80211_vht_handle_opmode(sdata, link_sta,
5753                                             *elems->opmode_notif,
5754                                             rx_status->band);
5755         mutex_unlock(&local->sta_mtx);
5756
5757         changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
5758                                                elems->country_elem,
5759                                                elems->country_elem_len,
5760                                                elems->pwr_constr_elem,
5761                                                elems->cisco_dtpc_elem);
5762
5763         ieee80211_link_info_change_notify(sdata, link, changed);
5764 free:
5765         kfree(elems);
5766 }
5767
5768 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
5769                                  struct sk_buff *skb)
5770 {
5771         struct ieee80211_link_data *link = &sdata->deflink;
5772         struct ieee80211_rx_status *rx_status;
5773         struct ieee80211_hdr *hdr;
5774         u16 fc;
5775
5776         rx_status = (struct ieee80211_rx_status *) skb->cb;
5777         hdr = (struct ieee80211_hdr *) skb->data;
5778         fc = le16_to_cpu(hdr->frame_control);
5779
5780         sdata_lock(sdata);
5781         switch (fc & IEEE80211_FCTL_STYPE) {
5782         case IEEE80211_STYPE_S1G_BEACON:
5783                 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
5784                 break;
5785         }
5786         sdata_unlock(sdata);
5787 }
5788
5789 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
5790                                   struct sk_buff *skb)
5791 {
5792         struct ieee80211_link_data *link = &sdata->deflink;
5793         struct ieee80211_rx_status *rx_status;
5794         struct ieee80211_mgmt *mgmt;
5795         u16 fc;
5796         int ies_len;
5797
5798         rx_status = (struct ieee80211_rx_status *) skb->cb;
5799         mgmt = (struct ieee80211_mgmt *) skb->data;
5800         fc = le16_to_cpu(mgmt->frame_control);
5801
5802         sdata_lock(sdata);
5803
5804         if (rx_status->link_valid) {
5805                 link = sdata_dereference(sdata->link[rx_status->link_id],
5806                                          sdata);
5807                 if (!link)
5808                         goto out;
5809         }
5810
5811         switch (fc & IEEE80211_FCTL_STYPE) {
5812         case IEEE80211_STYPE_BEACON:
5813                 ieee80211_rx_mgmt_beacon(link, (void *)mgmt,
5814                                          skb->len, rx_status);
5815                 break;
5816         case IEEE80211_STYPE_PROBE_RESP:
5817                 ieee80211_rx_mgmt_probe_resp(link, skb);
5818                 break;
5819         case IEEE80211_STYPE_AUTH:
5820                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
5821                 break;
5822         case IEEE80211_STYPE_DEAUTH:
5823                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
5824                 break;
5825         case IEEE80211_STYPE_DISASSOC:
5826                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
5827                 break;
5828         case IEEE80211_STYPE_ASSOC_RESP:
5829         case IEEE80211_STYPE_REASSOC_RESP:
5830                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
5831                 break;
5832         case IEEE80211_STYPE_ACTION:
5833                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
5834                         struct ieee802_11_elems *elems;
5835
5836                         ies_len = skb->len -
5837                                   offsetof(struct ieee80211_mgmt,
5838                                            u.action.u.chan_switch.variable);
5839
5840                         if (ies_len < 0)
5841                                 break;
5842
5843                         /* CSA IE cannot be overridden, no need for BSSID */
5844                         elems = ieee802_11_parse_elems(
5845                                         mgmt->u.action.u.chan_switch.variable,
5846                                         ies_len, true, NULL);
5847
5848                         if (elems && !elems->parse_error)
5849                                 ieee80211_sta_process_chanswitch(link,
5850                                                                  rx_status->mactime,
5851                                                                  rx_status->device_timestamp,
5852                                                                  elems, false);
5853                         kfree(elems);
5854                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
5855                         struct ieee802_11_elems *elems;
5856
5857                         ies_len = skb->len -
5858                                   offsetof(struct ieee80211_mgmt,
5859                                            u.action.u.ext_chan_switch.variable);
5860
5861                         if (ies_len < 0)
5862                                 break;
5863
5864                         /*
5865                          * extended CSA IE can't be overridden, no need for
5866                          * BSSID
5867                          */
5868                         elems = ieee802_11_parse_elems(
5869                                         mgmt->u.action.u.ext_chan_switch.variable,
5870                                         ies_len, true, NULL);
5871
5872                         if (elems && !elems->parse_error) {
5873                                 /* for the handling code pretend it was an IE */
5874                                 elems->ext_chansw_ie =
5875                                         &mgmt->u.action.u.ext_chan_switch.data;
5876
5877                                 ieee80211_sta_process_chanswitch(link,
5878                                                                  rx_status->mactime,
5879                                                                  rx_status->device_timestamp,
5880                                                                  elems, false);
5881                         }
5882
5883                         kfree(elems);
5884                 }
5885                 break;
5886         }
5887 out:
5888         sdata_unlock(sdata);
5889 }
5890
5891 static void ieee80211_sta_timer(struct timer_list *t)
5892 {
5893         struct ieee80211_sub_if_data *sdata =
5894                 from_timer(sdata, t, u.mgd.timer);
5895
5896         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
5897 }
5898
5899 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
5900                                    u8 reason, bool tx)
5901 {
5902         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5903
5904         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
5905                                tx, frame_buf);
5906
5907         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5908                                     reason, false);
5909 }
5910
5911 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
5912 {
5913         struct ieee80211_local *local = sdata->local;
5914         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5915         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
5916         u32 tx_flags = 0;
5917         u16 trans = 1;
5918         u16 status = 0;
5919         struct ieee80211_prep_tx_info info = {
5920                 .subtype = IEEE80211_STYPE_AUTH,
5921         };
5922
5923         sdata_assert_lock(sdata);
5924
5925         if (WARN_ON_ONCE(!auth_data))
5926                 return -EINVAL;
5927
5928         auth_data->tries++;
5929
5930         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
5931                 sdata_info(sdata, "authentication with %pM timed out\n",
5932                            auth_data->ap_addr);
5933
5934                 /*
5935                  * Most likely AP is not in the range so remove the
5936                  * bss struct for that AP.
5937                  */
5938                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
5939
5940                 return -ETIMEDOUT;
5941         }
5942
5943         if (auth_data->algorithm == WLAN_AUTH_SAE)
5944                 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
5945
5946         drv_mgd_prepare_tx(local, sdata, &info);
5947
5948         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
5949                    auth_data->ap_addr, auth_data->tries,
5950                    IEEE80211_AUTH_MAX_TRIES);
5951
5952         auth_data->expected_transaction = 2;
5953
5954         if (auth_data->algorithm == WLAN_AUTH_SAE) {
5955                 trans = auth_data->sae_trans;
5956                 status = auth_data->sae_status;
5957                 auth_data->expected_transaction = trans;
5958         }
5959
5960         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
5961                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
5962                            IEEE80211_TX_INTFL_MLME_CONN_TX;
5963
5964         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
5965                             auth_data->data, auth_data->data_len,
5966                             auth_data->ap_addr, auth_data->ap_addr,
5967                             NULL, 0, 0, tx_flags);
5968
5969         if (tx_flags == 0) {
5970                 if (auth_data->algorithm == WLAN_AUTH_SAE)
5971                         auth_data->timeout = jiffies +
5972                                 IEEE80211_AUTH_TIMEOUT_SAE;
5973                 else
5974                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
5975         } else {
5976                 auth_data->timeout =
5977                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
5978         }
5979
5980         auth_data->timeout_started = true;
5981         run_again(sdata, auth_data->timeout);
5982
5983         return 0;
5984 }
5985
5986 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
5987 {
5988         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
5989         struct ieee80211_local *local = sdata->local;
5990         int ret;
5991
5992         sdata_assert_lock(sdata);
5993
5994         assoc_data->tries++;
5995         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
5996                 sdata_info(sdata, "association with %pM timed out\n",
5997                            assoc_data->ap_addr);
5998
5999                 /*
6000                  * Most likely AP is not in the range so remove the
6001                  * bss struct for that AP.
6002                  */
6003                 cfg80211_unlink_bss(local->hw.wiphy,
6004                                     assoc_data->link[assoc_data->assoc_link_id].bss);
6005
6006                 return -ETIMEDOUT;
6007         }
6008
6009         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
6010                    assoc_data->ap_addr, assoc_data->tries,
6011                    IEEE80211_ASSOC_MAX_TRIES);
6012         ret = ieee80211_send_assoc(sdata);
6013         if (ret)
6014                 return ret;
6015
6016         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6017                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
6018                 assoc_data->timeout_started = true;
6019                 run_again(sdata, assoc_data->timeout);
6020         } else {
6021                 assoc_data->timeout =
6022                         round_jiffies_up(jiffies +
6023                                          IEEE80211_ASSOC_TIMEOUT_LONG);
6024                 assoc_data->timeout_started = true;
6025                 run_again(sdata, assoc_data->timeout);
6026         }
6027
6028         return 0;
6029 }
6030
6031 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
6032                                   __le16 fc, bool acked)
6033 {
6034         struct ieee80211_local *local = sdata->local;
6035
6036         sdata->u.mgd.status_fc = fc;
6037         sdata->u.mgd.status_acked = acked;
6038         sdata->u.mgd.status_received = true;
6039
6040         ieee80211_queue_work(&local->hw, &sdata->work);
6041 }
6042
6043 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
6044 {
6045         struct ieee80211_local *local = sdata->local;
6046         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6047
6048         sdata_lock(sdata);
6049
6050         if (ifmgd->status_received) {
6051                 __le16 fc = ifmgd->status_fc;
6052                 bool status_acked = ifmgd->status_acked;
6053
6054                 ifmgd->status_received = false;
6055                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
6056                         if (status_acked) {
6057                                 if (ifmgd->auth_data->algorithm ==
6058                                     WLAN_AUTH_SAE)
6059                                         ifmgd->auth_data->timeout =
6060                                                 jiffies +
6061                                                 IEEE80211_AUTH_TIMEOUT_SAE;
6062                                 else
6063                                         ifmgd->auth_data->timeout =
6064                                                 jiffies +
6065                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
6066                                 run_again(sdata, ifmgd->auth_data->timeout);
6067                         } else {
6068                                 ifmgd->auth_data->timeout = jiffies - 1;
6069                         }
6070                         ifmgd->auth_data->timeout_started = true;
6071                 } else if (ifmgd->assoc_data &&
6072                            (ieee80211_is_assoc_req(fc) ||
6073                             ieee80211_is_reassoc_req(fc))) {
6074                         if (status_acked) {
6075                                 ifmgd->assoc_data->timeout =
6076                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
6077                                 run_again(sdata, ifmgd->assoc_data->timeout);
6078                         } else {
6079                                 ifmgd->assoc_data->timeout = jiffies - 1;
6080                         }
6081                         ifmgd->assoc_data->timeout_started = true;
6082                 }
6083         }
6084
6085         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
6086             time_after(jiffies, ifmgd->auth_data->timeout)) {
6087                 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
6088                         /*
6089                          * ok ... we waited for assoc or continuation but
6090                          * userspace didn't do it, so kill the auth data
6091                          */
6092                         ieee80211_destroy_auth_data(sdata, false);
6093                 } else if (ieee80211_auth(sdata)) {
6094                         u8 ap_addr[ETH_ALEN];
6095                         struct ieee80211_event event = {
6096                                 .type = MLME_EVENT,
6097                                 .u.mlme.data = AUTH_EVENT,
6098                                 .u.mlme.status = MLME_TIMEOUT,
6099                         };
6100
6101                         memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN);
6102
6103                         ieee80211_destroy_auth_data(sdata, false);
6104
6105                         cfg80211_auth_timeout(sdata->dev, ap_addr);
6106                         drv_event_callback(sdata->local, sdata, &event);
6107                 }
6108         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
6109                 run_again(sdata, ifmgd->auth_data->timeout);
6110
6111         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
6112             time_after(jiffies, ifmgd->assoc_data->timeout)) {
6113                 if ((ifmgd->assoc_data->need_beacon &&
6114                      !sdata->deflink.u.mgd.have_beacon) ||
6115                     ieee80211_do_assoc(sdata)) {
6116                         struct ieee80211_event event = {
6117                                 .type = MLME_EVENT,
6118                                 .u.mlme.data = ASSOC_EVENT,
6119                                 .u.mlme.status = MLME_TIMEOUT,
6120                         };
6121
6122                         ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
6123                         drv_event_callback(sdata->local, sdata, &event);
6124                 }
6125         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
6126                 run_again(sdata, ifmgd->assoc_data->timeout);
6127
6128         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
6129             ifmgd->associated) {
6130                 u8 *bssid = sdata->deflink.u.mgd.bssid;
6131                 int max_tries;
6132
6133                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6134                         max_tries = max_nullfunc_tries;
6135                 else
6136                         max_tries = max_probe_tries;
6137
6138                 /* ACK received for nullfunc probing frame */
6139                 if (!ifmgd->probe_send_count)
6140                         ieee80211_reset_ap_probe(sdata);
6141                 else if (ifmgd->nullfunc_failed) {
6142                         if (ifmgd->probe_send_count < max_tries) {
6143                                 mlme_dbg(sdata,
6144                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
6145                                          bssid, ifmgd->probe_send_count,
6146                                          max_tries);
6147                                 ieee80211_mgd_probe_ap_send(sdata);
6148                         } else {
6149                                 mlme_dbg(sdata,
6150                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
6151                                          bssid);
6152                                 ieee80211_sta_connection_lost(sdata,
6153                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
6154                                         false);
6155                         }
6156                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
6157                         run_again(sdata, ifmgd->probe_timeout);
6158                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6159                         mlme_dbg(sdata,
6160                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
6161                                  bssid, probe_wait_ms);
6162                         ieee80211_sta_connection_lost(sdata,
6163                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6164                 } else if (ifmgd->probe_send_count < max_tries) {
6165                         mlme_dbg(sdata,
6166                                  "No probe response from AP %pM after %dms, try %d/%i\n",
6167                                  bssid, probe_wait_ms,
6168                                  ifmgd->probe_send_count, max_tries);
6169                         ieee80211_mgd_probe_ap_send(sdata);
6170                 } else {
6171                         /*
6172                          * We actually lost the connection ... or did we?
6173                          * Let's make sure!
6174                          */
6175                         mlme_dbg(sdata,
6176                                  "No probe response from AP %pM after %dms, disconnecting.\n",
6177                                  bssid, probe_wait_ms);
6178
6179                         ieee80211_sta_connection_lost(sdata,
6180                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6181                 }
6182         }
6183
6184         sdata_unlock(sdata);
6185 }
6186
6187 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
6188 {
6189         struct ieee80211_sub_if_data *sdata =
6190                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
6191
6192         if (WARN_ON(sdata->vif.valid_links))
6193                 return;
6194
6195         if (sdata->vif.bss_conf.csa_active &&
6196             !sdata->deflink.u.mgd.csa_waiting_bcn)
6197                 return;
6198
6199         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
6200                 return;
6201
6202         sdata->u.mgd.connection_loss = false;
6203         ieee80211_queue_work(&sdata->local->hw,
6204                              &sdata->u.mgd.beacon_connection_loss_work);
6205 }
6206
6207 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
6208 {
6209         struct ieee80211_sub_if_data *sdata =
6210                 from_timer(sdata, t, u.mgd.conn_mon_timer);
6211         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6212         struct ieee80211_local *local = sdata->local;
6213         struct sta_info *sta;
6214         unsigned long timeout;
6215
6216         if (WARN_ON(sdata->vif.valid_links))
6217                 return;
6218
6219         if (sdata->vif.bss_conf.csa_active &&
6220             !sdata->deflink.u.mgd.csa_waiting_bcn)
6221                 return;
6222
6223         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
6224         if (!sta)
6225                 return;
6226
6227         timeout = sta->deflink.status_stats.last_ack;
6228         if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
6229                 timeout = sta->deflink.rx_stats.last_rx;
6230         timeout += IEEE80211_CONNECTION_IDLE_TIME;
6231
6232         /* If timeout is after now, then update timer to fire at
6233          * the later date, but do not actually probe at this time.
6234          */
6235         if (time_is_after_jiffies(timeout)) {
6236                 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
6237                 return;
6238         }
6239
6240         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
6241 }
6242
6243 static void ieee80211_sta_monitor_work(struct work_struct *work)
6244 {
6245         struct ieee80211_sub_if_data *sdata =
6246                 container_of(work, struct ieee80211_sub_if_data,
6247                              u.mgd.monitor_work);
6248
6249         ieee80211_mgd_probe_ap(sdata, false);
6250 }
6251
6252 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
6253 {
6254         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
6255                 __ieee80211_stop_poll(sdata);
6256
6257                 /* let's probe the connection once */
6258                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
6259                         ieee80211_queue_work(&sdata->local->hw,
6260                                              &sdata->u.mgd.monitor_work);
6261         }
6262 }
6263
6264 #ifdef CONFIG_PM
6265 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
6266 {
6267         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6268         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6269
6270         sdata_lock(sdata);
6271
6272         if (ifmgd->auth_data || ifmgd->assoc_data) {
6273                 const u8 *ap_addr = ifmgd->auth_data ?
6274                                 ifmgd->auth_data->ap_addr :
6275                                 ifmgd->assoc_data->ap_addr;
6276
6277                 /*
6278                  * If we are trying to authenticate / associate while suspending,
6279                  * cfg80211 won't know and won't actually abort those attempts,
6280                  * thus we need to do that ourselves.
6281                  */
6282                 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr,
6283                                                IEEE80211_STYPE_DEAUTH,
6284                                                WLAN_REASON_DEAUTH_LEAVING,
6285                                                false, frame_buf);
6286                 if (ifmgd->assoc_data)
6287                         ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
6288                 if (ifmgd->auth_data)
6289                         ieee80211_destroy_auth_data(sdata, false);
6290                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
6291                                       IEEE80211_DEAUTH_FRAME_LEN,
6292                                       false);
6293         }
6294
6295         /* This is a bit of a hack - we should find a better and more generic
6296          * solution to this. Normally when suspending, cfg80211 will in fact
6297          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
6298          * auth (not so important) or assoc (this is the problem) process.
6299          *
6300          * As a consequence, it can happen that we are in the process of both
6301          * associating and suspending, and receive an association response
6302          * after cfg80211 has checked if it needs to disconnect, but before
6303          * we actually set the flag to drop incoming frames. This will then
6304          * cause the workqueue flush to process the association response in
6305          * the suspend, resulting in a successful association just before it
6306          * tries to remove the interface from the driver, which now though
6307          * has a channel context assigned ... this results in issues.
6308          *
6309          * To work around this (for now) simply deauth here again if we're
6310          * now connected.
6311          */
6312         if (ifmgd->associated && !sdata->local->wowlan) {
6313                 u8 bssid[ETH_ALEN];
6314                 struct cfg80211_deauth_request req = {
6315                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
6316                         .bssid = bssid,
6317                 };
6318
6319                 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
6320                 ieee80211_mgd_deauth(sdata, &req);
6321         }
6322
6323         sdata_unlock(sdata);
6324 }
6325 #endif
6326
6327 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
6328 {
6329         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6330
6331         sdata_lock(sdata);
6332         if (!ifmgd->associated) {
6333                 sdata_unlock(sdata);
6334                 return;
6335         }
6336
6337         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
6338                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
6339                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
6340                 ieee80211_sta_connection_lost(sdata,
6341                                               WLAN_REASON_UNSPECIFIED,
6342                                               true);
6343                 sdata_unlock(sdata);
6344                 return;
6345         }
6346
6347         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
6348                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
6349                 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
6350                 ieee80211_sta_connection_lost(sdata,
6351                                               WLAN_REASON_UNSPECIFIED,
6352                                               true);
6353                 sdata_unlock(sdata);
6354                 return;
6355         }
6356
6357         sdata_unlock(sdata);
6358 }
6359
6360 static void ieee80211_request_smps_mgd_work(struct work_struct *work)
6361 {
6362         struct ieee80211_link_data *link =
6363                 container_of(work, struct ieee80211_link_data,
6364                              u.mgd.request_smps_work);
6365
6366         sdata_lock(link->sdata);
6367         __ieee80211_request_smps_mgd(link->sdata, link,
6368                                      link->u.mgd.driver_smps_mode);
6369         sdata_unlock(link->sdata);
6370 }
6371
6372 /* interface setup */
6373 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
6374 {
6375         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6376
6377         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
6378         INIT_WORK(&ifmgd->beacon_connection_loss_work,
6379                   ieee80211_beacon_connection_loss_work);
6380         INIT_WORK(&ifmgd->csa_connection_drop_work,
6381                   ieee80211_csa_connection_drop_work);
6382         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
6383                           ieee80211_tdls_peer_del_work);
6384         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
6385         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
6386         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
6387         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
6388                           ieee80211_sta_handle_tspec_ac_params_wk);
6389
6390         ifmgd->flags = 0;
6391         ifmgd->powersave = sdata->wdev.ps;
6392         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
6393         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
6394         /* Setup TDLS data */
6395         spin_lock_init(&ifmgd->teardown_lock);
6396         ifmgd->teardown_skb = NULL;
6397         ifmgd->orig_teardown_skb = NULL;
6398 }
6399
6400 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
6401 {
6402         struct ieee80211_sub_if_data *sdata = link->sdata;
6403         struct ieee80211_local *local = sdata->local;
6404         unsigned int link_id = link->link_id;
6405
6406         link->u.mgd.p2p_noa_index = -1;
6407         link->u.mgd.conn_flags = 0;
6408         link->conf->bssid = link->u.mgd.bssid;
6409
6410         INIT_WORK(&link->u.mgd.request_smps_work,
6411                   ieee80211_request_smps_mgd_work);
6412         if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
6413                 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
6414         else
6415                 link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
6416
6417         INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work);
6418         timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0);
6419
6420         if (sdata->u.mgd.assoc_data)
6421                 ether_addr_copy(link->conf->addr,
6422                                 sdata->u.mgd.assoc_data->link[link_id].addr);
6423         else if (!is_valid_ether_addr(link->conf->addr))
6424                 eth_random_addr(link->conf->addr);
6425 }
6426
6427 /* scan finished notification */
6428 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
6429 {
6430         struct ieee80211_sub_if_data *sdata;
6431
6432         /* Restart STA timers */
6433         rcu_read_lock();
6434         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
6435                 if (ieee80211_sdata_running(sdata))
6436                         ieee80211_restart_sta_timer(sdata);
6437         }
6438         rcu_read_unlock();
6439 }
6440
6441 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
6442                                      struct cfg80211_bss *cbss, s8 link_id,
6443                                      const u8 *ap_mld_addr, bool assoc,
6444                                      bool override)
6445 {
6446         struct ieee80211_local *local = sdata->local;
6447         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6448         struct ieee80211_bss *bss = (void *)cbss->priv;
6449         struct sta_info *new_sta = NULL;
6450         struct ieee80211_link_data *link;
6451         bool have_sta = false;
6452         bool mlo;
6453         int err;
6454
6455         if (link_id >= 0) {
6456                 mlo = true;
6457                 if (WARN_ON(!ap_mld_addr))
6458                         return -EINVAL;
6459                 err = ieee80211_vif_set_links(sdata, BIT(link_id));
6460         } else {
6461                 if (WARN_ON(ap_mld_addr))
6462                         return -EINVAL;
6463                 ap_mld_addr = cbss->bssid;
6464                 err = ieee80211_vif_set_links(sdata, 0);
6465                 link_id = 0;
6466                 mlo = false;
6467         }
6468
6469         if (err)
6470                 return err;
6471
6472         link = sdata_dereference(sdata->link[link_id], sdata);
6473         if (WARN_ON(!link)) {
6474                 err = -ENOLINK;
6475                 goto out_err;
6476         }
6477
6478         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
6479                 err = -EINVAL;
6480                 goto out_err;
6481         }
6482
6483         /* If a reconfig is happening, bail out */
6484         if (local->in_reconfig) {
6485                 err = -EBUSY;
6486                 goto out_err;
6487         }
6488
6489         if (assoc) {
6490                 rcu_read_lock();
6491                 have_sta = sta_info_get(sdata, ap_mld_addr);
6492                 rcu_read_unlock();
6493         }
6494
6495         if (!have_sta) {
6496                 if (mlo)
6497                         new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr,
6498                                                            link_id, cbss->bssid,
6499                                                            GFP_KERNEL);
6500                 else
6501                         new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL);
6502
6503                 if (!new_sta) {
6504                         err = -ENOMEM;
6505                         goto out_err;
6506                 }
6507
6508                 new_sta->sta.mlo = mlo;
6509         }
6510
6511         /*
6512          * Set up the information for the new channel before setting the
6513          * new channel. We can't - completely race-free - change the basic
6514          * rates bitmap and the channel (sband) that it refers to, but if
6515          * we set it up before we at least avoid calling into the driver's
6516          * bss_info_changed() method with invalid information (since we do
6517          * call that from changing the channel - only for IDLE and perhaps
6518          * some others, but ...).
6519          *
6520          * So to avoid that, just set up all the new information before the
6521          * channel, but tell the driver to apply it only afterwards, since
6522          * it might need the new channel for that.
6523          */
6524         if (new_sta) {
6525                 const struct cfg80211_bss_ies *ies;
6526                 struct link_sta_info *link_sta;
6527
6528                 rcu_read_lock();
6529                 link_sta = rcu_dereference(new_sta->link[link_id]);
6530                 if (WARN_ON(!link_sta)) {
6531                         rcu_read_unlock();
6532                         sta_info_free(local, new_sta);
6533                         err = -EINVAL;
6534                         goto out_err;
6535                 }
6536
6537                 err = ieee80211_mgd_setup_link_sta(link, new_sta,
6538                                                    link_sta, cbss);
6539                 if (err) {
6540                         rcu_read_unlock();
6541                         sta_info_free(local, new_sta);
6542                         goto out_err;
6543                 }
6544
6545                 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
6546
6547                 /* set timing information */
6548                 link->conf->beacon_int = cbss->beacon_interval;
6549                 ies = rcu_dereference(cbss->beacon_ies);
6550                 if (ies) {
6551                         link->conf->sync_tsf = ies->tsf;
6552                         link->conf->sync_device_ts =
6553                                 bss->device_ts_beacon;
6554
6555                         ieee80211_get_dtim(ies,
6556                                            &link->conf->sync_dtim_count,
6557                                            NULL);
6558                 } else if (!ieee80211_hw_check(&sdata->local->hw,
6559                                                TIMING_BEACON_ONLY)) {
6560                         ies = rcu_dereference(cbss->proberesp_ies);
6561                         /* must be non-NULL since beacon IEs were NULL */
6562                         link->conf->sync_tsf = ies->tsf;
6563                         link->conf->sync_device_ts =
6564                                 bss->device_ts_presp;
6565                         link->conf->sync_dtim_count = 0;
6566                 } else {
6567                         link->conf->sync_tsf = 0;
6568                         link->conf->sync_device_ts = 0;
6569                         link->conf->sync_dtim_count = 0;
6570                 }
6571                 rcu_read_unlock();
6572         }
6573
6574         if (new_sta || override) {
6575                 err = ieee80211_prep_channel(sdata, link, cbss,
6576                                              &link->u.mgd.conn_flags);
6577                 if (err) {
6578                         if (new_sta)
6579                                 sta_info_free(local, new_sta);
6580                         goto out_err;
6581                 }
6582         }
6583
6584         if (new_sta) {
6585                 /*
6586                  * tell driver about BSSID, basic rates and timing
6587                  * this was set up above, before setting the channel
6588                  */
6589                 ieee80211_link_info_change_notify(sdata, link,
6590                                                   BSS_CHANGED_BSSID |
6591                                                   BSS_CHANGED_BASIC_RATES |
6592                                                   BSS_CHANGED_BEACON_INT);
6593
6594                 if (assoc)
6595                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
6596
6597                 err = sta_info_insert(new_sta);
6598                 new_sta = NULL;
6599                 if (err) {
6600                         sdata_info(sdata,
6601                                    "failed to insert STA entry for the AP (error %d)\n",
6602                                    err);
6603                         goto out_err;
6604                 }
6605         } else
6606                 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
6607
6608         /* Cancel scan to ensure that nothing interferes with connection */
6609         if (local->scanning)
6610                 ieee80211_scan_cancel(local);
6611
6612         return 0;
6613
6614 out_err:
6615         ieee80211_link_release_channel(&sdata->deflink);
6616         ieee80211_vif_set_links(sdata, 0);
6617         return err;
6618 }
6619
6620 /* config hooks */
6621 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
6622                        struct cfg80211_auth_request *req)
6623 {
6624         struct ieee80211_local *local = sdata->local;
6625         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6626         struct ieee80211_mgd_auth_data *auth_data;
6627         u16 auth_alg;
6628         int err;
6629         bool cont_auth;
6630
6631         /* prepare auth data structure */
6632
6633         switch (req->auth_type) {
6634         case NL80211_AUTHTYPE_OPEN_SYSTEM:
6635                 auth_alg = WLAN_AUTH_OPEN;
6636                 break;
6637         case NL80211_AUTHTYPE_SHARED_KEY:
6638                 if (fips_enabled)
6639                         return -EOPNOTSUPP;
6640                 auth_alg = WLAN_AUTH_SHARED_KEY;
6641                 break;
6642         case NL80211_AUTHTYPE_FT:
6643                 auth_alg = WLAN_AUTH_FT;
6644                 break;
6645         case NL80211_AUTHTYPE_NETWORK_EAP:
6646                 auth_alg = WLAN_AUTH_LEAP;
6647                 break;
6648         case NL80211_AUTHTYPE_SAE:
6649                 auth_alg = WLAN_AUTH_SAE;
6650                 break;
6651         case NL80211_AUTHTYPE_FILS_SK:
6652                 auth_alg = WLAN_AUTH_FILS_SK;
6653                 break;
6654         case NL80211_AUTHTYPE_FILS_SK_PFS:
6655                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
6656                 break;
6657         case NL80211_AUTHTYPE_FILS_PK:
6658                 auth_alg = WLAN_AUTH_FILS_PK;
6659                 break;
6660         default:
6661                 return -EOPNOTSUPP;
6662         }
6663
6664         if (ifmgd->assoc_data)
6665                 return -EBUSY;
6666
6667         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
6668                             req->ie_len, GFP_KERNEL);
6669         if (!auth_data)
6670                 return -ENOMEM;
6671
6672         memcpy(auth_data->ap_addr,
6673                req->ap_mld_addr ?: req->bss->bssid,
6674                ETH_ALEN);
6675         auth_data->bss = req->bss;
6676         auth_data->link_id = req->link_id;
6677
6678         if (req->auth_data_len >= 4) {
6679                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
6680                         __le16 *pos = (__le16 *) req->auth_data;
6681
6682                         auth_data->sae_trans = le16_to_cpu(pos[0]);
6683                         auth_data->sae_status = le16_to_cpu(pos[1]);
6684                 }
6685                 memcpy(auth_data->data, req->auth_data + 4,
6686                        req->auth_data_len - 4);
6687                 auth_data->data_len += req->auth_data_len - 4;
6688         }
6689
6690         /* Check if continuing authentication or trying to authenticate with the
6691          * same BSS that we were in the process of authenticating with and avoid
6692          * removal and re-addition of the STA entry in
6693          * ieee80211_prep_connection().
6694          */
6695         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
6696                     ifmgd->auth_data->link_id == req->link_id;
6697
6698         if (req->ie && req->ie_len) {
6699                 memcpy(&auth_data->data[auth_data->data_len],
6700                        req->ie, req->ie_len);
6701                 auth_data->data_len += req->ie_len;
6702         }
6703
6704         if (req->key && req->key_len) {
6705                 auth_data->key_len = req->key_len;
6706                 auth_data->key_idx = req->key_idx;
6707                 memcpy(auth_data->key, req->key, req->key_len);
6708         }
6709
6710         auth_data->algorithm = auth_alg;
6711
6712         /* try to authenticate/probe */
6713
6714         if (ifmgd->auth_data) {
6715                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
6716                         auth_data->peer_confirmed =
6717                                 ifmgd->auth_data->peer_confirmed;
6718                 }
6719                 ieee80211_destroy_auth_data(sdata, cont_auth);
6720         }
6721
6722         /* prep auth_data so we don't go into idle on disassoc */
6723         ifmgd->auth_data = auth_data;
6724
6725         /* If this is continuation of an ongoing SAE authentication exchange
6726          * (i.e., request to send SAE Confirm) and the peer has already
6727          * confirmed, mark authentication completed since we are about to send
6728          * out SAE Confirm.
6729          */
6730         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
6731             auth_data->peer_confirmed && auth_data->sae_trans == 2)
6732                 ieee80211_mark_sta_auth(sdata);
6733
6734         if (ifmgd->associated) {
6735                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6736
6737                 sdata_info(sdata,
6738                            "disconnect from AP %pM for new auth to %pM\n",
6739                            sdata->vif.cfg.ap_addr, auth_data->ap_addr);
6740                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6741                                        WLAN_REASON_UNSPECIFIED,
6742                                        false, frame_buf);
6743
6744                 ieee80211_report_disconnect(sdata, frame_buf,
6745                                             sizeof(frame_buf), true,
6746                                             WLAN_REASON_UNSPECIFIED,
6747                                             false);
6748         }
6749
6750         sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr);
6751
6752         /* needed for transmitting the auth frame(s) properly */
6753         memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
6754
6755         err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
6756                                         req->ap_mld_addr, cont_auth, false);
6757         if (err)
6758                 goto err_clear;
6759
6760         err = ieee80211_auth(sdata);
6761         if (err) {
6762                 sta_info_destroy_addr(sdata, auth_data->ap_addr);
6763                 goto err_clear;
6764         }
6765
6766         /* hold our own reference */
6767         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
6768         return 0;
6769
6770  err_clear:
6771         if (!sdata->vif.valid_links) {
6772                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
6773                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
6774                                                   BSS_CHANGED_BSSID);
6775                 mutex_lock(&sdata->local->mtx);
6776                 ieee80211_link_release_channel(&sdata->deflink);
6777                 mutex_unlock(&sdata->local->mtx);
6778         }
6779         ifmgd->auth_data = NULL;
6780         kfree(auth_data);
6781         return err;
6782 }
6783
6784 static ieee80211_conn_flags_t
6785 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
6786                            struct ieee80211_mgd_assoc_data *assoc_data,
6787                            struct cfg80211_assoc_request *req,
6788                            ieee80211_conn_flags_t conn_flags,
6789                            unsigned int link_id)
6790 {
6791         struct ieee80211_local *local = sdata->local;
6792         const struct cfg80211_bss_ies *beacon_ies;
6793         struct ieee80211_supported_band *sband;
6794         const struct element *ht_elem, *vht_elem;
6795         struct ieee80211_link_data *link;
6796         struct cfg80211_bss *cbss;
6797         struct ieee80211_bss *bss;
6798         bool is_5ghz, is_6ghz;
6799
6800         cbss = assoc_data->link[link_id].bss;
6801         if (WARN_ON(!cbss))
6802                 return 0;
6803
6804         bss = (void *)cbss->priv;
6805
6806         sband = local->hw.wiphy->bands[cbss->channel->band];
6807         if (WARN_ON(!sband))
6808                 return 0;
6809
6810         link = sdata_dereference(sdata->link[link_id], sdata);
6811         if (WARN_ON(!link))
6812                 return 0;
6813
6814         is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
6815         is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
6816
6817         /* for MLO connections assume advertising all rates is OK */
6818         if (!req->ap_mld_addr) {
6819                 assoc_data->supp_rates = bss->supp_rates;
6820                 assoc_data->supp_rates_len = bss->supp_rates_len;
6821         }
6822
6823         /* copy and link elems for the STA profile */
6824         if (req->links[link_id].elems_len) {
6825                 memcpy(assoc_data->ie_pos, req->links[link_id].elems,
6826                        req->links[link_id].elems_len);
6827                 assoc_data->link[link_id].elems = assoc_data->ie_pos;
6828                 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
6829                 assoc_data->ie_pos += req->links[link_id].elems_len;
6830         }
6831
6832         rcu_read_lock();
6833         ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
6834         if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
6835                 assoc_data->link[link_id].ap_ht_param =
6836                         ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
6837         else if (!is_6ghz)
6838                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
6839         vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
6840         if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
6841                 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data,
6842                        sizeof(struct ieee80211_vht_cap));
6843         } else if (is_5ghz) {
6844                 link_info(link,
6845                           "VHT capa missing/short, disabling VHT/HE/EHT\n");
6846                 conn_flags |= IEEE80211_CONN_DISABLE_VHT |
6847                               IEEE80211_CONN_DISABLE_HE |
6848                               IEEE80211_CONN_DISABLE_EHT;
6849         }
6850         rcu_read_unlock();
6851
6852         link->u.mgd.beacon_crc_valid = false;
6853         link->u.mgd.dtim_period = 0;
6854         link->u.mgd.have_beacon = false;
6855
6856         /* override HT/VHT configuration only if the AP and we support it */
6857         if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) {
6858                 struct ieee80211_sta_ht_cap sta_ht_cap;
6859
6860                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
6861                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
6862         }
6863
6864         rcu_read_lock();
6865         beacon_ies = rcu_dereference(cbss->beacon_ies);
6866         if (beacon_ies) {
6867                 const struct element *elem;
6868                 u8 dtim_count = 0;
6869
6870                 ieee80211_get_dtim(beacon_ies, &dtim_count,
6871                                    &link->u.mgd.dtim_period);
6872
6873                 sdata->deflink.u.mgd.have_beacon = true;
6874
6875                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
6876                         link->conf->sync_tsf = beacon_ies->tsf;
6877                         link->conf->sync_device_ts = bss->device_ts_beacon;
6878                         link->conf->sync_dtim_count = dtim_count;
6879                 }
6880
6881                 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
6882                                               beacon_ies->data, beacon_ies->len);
6883                 if (elem && elem->datalen >= 3)
6884                         link->conf->profile_periodicity = elem->data[2];
6885                 else
6886                         link->conf->profile_periodicity = 0;
6887
6888                 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
6889                                           beacon_ies->data, beacon_ies->len);
6890                 if (elem && elem->datalen >= 11 &&
6891                     (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6892                         link->conf->ema_ap = true;
6893                 else
6894                         link->conf->ema_ap = false;
6895         }
6896         rcu_read_unlock();
6897
6898         if (bss->corrupt_data) {
6899                 char *corrupt_type = "data";
6900
6901                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
6902                         if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
6903                                 corrupt_type = "beacon and probe response";
6904                         else
6905                                 corrupt_type = "beacon";
6906                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
6907                         corrupt_type = "probe response";
6908                 }
6909                 sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
6910                            cbss->bssid, corrupt_type);
6911         }
6912
6913         if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
6914                 if (sdata->u.mgd.powersave)
6915                         link->smps_mode = IEEE80211_SMPS_DYNAMIC;
6916                 else
6917                         link->smps_mode = IEEE80211_SMPS_OFF;
6918         } else {
6919                 link->smps_mode = link->u.mgd.req_smps;
6920         }
6921
6922         return conn_flags;
6923 }
6924
6925 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
6926                         struct cfg80211_assoc_request *req)
6927 {
6928         unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id;
6929         struct ieee80211_local *local = sdata->local;
6930         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6931         struct ieee80211_mgd_assoc_data *assoc_data;
6932         const struct element *ssid_elem;
6933         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
6934         ieee80211_conn_flags_t conn_flags = 0;
6935         struct ieee80211_link_data *link;
6936         struct cfg80211_bss *cbss;
6937         struct ieee80211_bss *bss;
6938         bool override;
6939         int i, err;
6940         size_t size = sizeof(*assoc_data) + req->ie_len;
6941
6942         for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
6943                 size += req->links[i].elems_len;
6944
6945         /* FIXME: no support for 4-addr MLO yet */
6946         if (sdata->u.mgd.use_4addr && req->link_id >= 0)
6947                 return -EOPNOTSUPP;
6948
6949         assoc_data = kzalloc(size, GFP_KERNEL);
6950         if (!assoc_data)
6951                 return -ENOMEM;
6952
6953         cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss;
6954
6955         rcu_read_lock();
6956         ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
6957         if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
6958                 rcu_read_unlock();
6959                 kfree(assoc_data);
6960                 return -EINVAL;
6961         }
6962         memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
6963         assoc_data->ssid_len = ssid_elem->datalen;
6964         memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
6965         vif_cfg->ssid_len = assoc_data->ssid_len;
6966         rcu_read_unlock();
6967
6968         if (req->ap_mld_addr) {
6969                 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
6970                         if (!req->links[i].bss)
6971                                 continue;
6972                         link = sdata_dereference(sdata->link[i], sdata);
6973                         if (link)
6974                                 ether_addr_copy(assoc_data->link[i].addr,
6975                                                 link->conf->addr);
6976                         else
6977                                 eth_random_addr(assoc_data->link[i].addr);
6978                 }
6979         } else {
6980                 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
6981         }
6982
6983         assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
6984
6985         memcpy(assoc_data->ap_addr,
6986                req->ap_mld_addr ?: req->bss->bssid,
6987                ETH_ALEN);
6988
6989         if (ifmgd->associated) {
6990                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6991
6992                 sdata_info(sdata,
6993                            "disconnect from AP %pM for new assoc to %pM\n",
6994                            sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
6995                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6996                                        WLAN_REASON_UNSPECIFIED,
6997                                        false, frame_buf);
6998
6999                 ieee80211_report_disconnect(sdata, frame_buf,
7000                                             sizeof(frame_buf), true,
7001                                             WLAN_REASON_UNSPECIFIED,
7002                                             false);
7003         }
7004
7005         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
7006                 err = -EBUSY;
7007                 goto err_free;
7008         }
7009
7010         if (ifmgd->assoc_data) {
7011                 err = -EBUSY;
7012                 goto err_free;
7013         }
7014
7015         if (ifmgd->auth_data) {
7016                 bool match;
7017
7018                 /* keep sta info, bssid if matching */
7019                 match = ether_addr_equal(ifmgd->auth_data->ap_addr,
7020                                          assoc_data->ap_addr) &&
7021                         ifmgd->auth_data->link_id == req->link_id;
7022                 ieee80211_destroy_auth_data(sdata, match);
7023         }
7024
7025         /* prepare assoc data */
7026
7027         bss = (void *)cbss->priv;
7028         assoc_data->wmm = bss->wmm_used &&
7029                           (local->hw.queues >= IEEE80211_NUM_ACS);
7030
7031         /*
7032          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
7033          * We still associate in non-HT mode (11a/b/g) if any one of these
7034          * ciphers is configured as pairwise.
7035          * We can set this to true for non-11n hardware, that'll be checked
7036          * separately along with the peer capabilities.
7037          */
7038         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
7039                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
7040                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
7041                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
7042                         conn_flags |= IEEE80211_CONN_DISABLE_HT;
7043                         conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7044                         conn_flags |= IEEE80211_CONN_DISABLE_HE;
7045                         conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7046                         netdev_info(sdata->dev,
7047                                     "disabling HT/VHT/HE due to WEP/TKIP use\n");
7048                 }
7049         }
7050
7051         /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
7052         if (!bss->wmm_used) {
7053                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7054                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7055                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7056                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7057                 netdev_info(sdata->dev,
7058                             "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
7059         }
7060
7061         if (req->flags & ASSOC_REQ_DISABLE_HT) {
7062                 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
7063                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7064                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7065                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7066                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7067         }
7068
7069         if (req->flags & ASSOC_REQ_DISABLE_VHT) {
7070                 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
7071                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7072         }
7073
7074         if (req->flags & ASSOC_REQ_DISABLE_HE) {
7075                 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
7076                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7077                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7078         }
7079
7080         if (req->flags & ASSOC_REQ_DISABLE_EHT)
7081                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7082
7083         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
7084         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
7085                sizeof(ifmgd->ht_capa_mask));
7086
7087         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
7088         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
7089                sizeof(ifmgd->vht_capa_mask));
7090
7091         memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
7092         memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
7093                sizeof(ifmgd->s1g_capa_mask));
7094
7095         if (req->ie && req->ie_len) {
7096                 memcpy(assoc_data->ie, req->ie, req->ie_len);
7097                 assoc_data->ie_len = req->ie_len;
7098                 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
7099         } else {
7100                 assoc_data->ie_pos = assoc_data->ie;
7101         }
7102
7103         if (req->fils_kek) {
7104                 /* should already be checked in cfg80211 - so warn */
7105                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
7106                         err = -EINVAL;
7107                         goto err_free;
7108                 }
7109                 memcpy(assoc_data->fils_kek, req->fils_kek,
7110                        req->fils_kek_len);
7111                 assoc_data->fils_kek_len = req->fils_kek_len;
7112         }
7113
7114         if (req->fils_nonces)
7115                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
7116                        2 * FILS_NONCE_LEN);
7117
7118         /* default timeout */
7119         assoc_data->timeout = jiffies;
7120         assoc_data->timeout_started = true;
7121
7122         assoc_data->assoc_link_id = assoc_link_id;
7123
7124         if (req->ap_mld_addr) {
7125                 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7126                         assoc_data->link[i].conn_flags = conn_flags;
7127                         assoc_data->link[i].bss = req->links[i].bss;
7128                 }
7129
7130                 /* if there was no authentication, set up the link */
7131                 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id));
7132                 if (err)
7133                         goto err_clear;
7134         } else {
7135                 assoc_data->link[0].conn_flags = conn_flags;
7136                 assoc_data->link[0].bss = cbss;
7137         }
7138
7139         link = sdata_dereference(sdata->link[assoc_link_id], sdata);
7140         if (WARN_ON(!link)) {
7141                 err = -EINVAL;
7142                 goto err_clear;
7143         }
7144
7145         /* keep old conn_flags from ieee80211_prep_channel() from auth */
7146         conn_flags |= link->u.mgd.conn_flags;
7147         conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req,
7148                                                  conn_flags, assoc_link_id);
7149         override = link->u.mgd.conn_flags != conn_flags;
7150         link->u.mgd.conn_flags |= conn_flags;
7151
7152         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
7153                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
7154              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
7155                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
7156
7157         if (bss->wmm_used && bss->uapsd_supported &&
7158             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
7159                 assoc_data->uapsd = true;
7160                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
7161         } else {
7162                 assoc_data->uapsd = false;
7163                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
7164         }
7165
7166         if (req->prev_bssid)
7167                 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN);
7168
7169         if (req->use_mfp) {
7170                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
7171                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
7172         } else {
7173                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
7174                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
7175         }
7176
7177         if (req->flags & ASSOC_REQ_USE_RRM)
7178                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
7179         else
7180                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
7181
7182         if (req->crypto.control_port)
7183                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
7184         else
7185                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
7186
7187         sdata->control_port_protocol = req->crypto.control_port_ethertype;
7188         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
7189         sdata->control_port_over_nl80211 =
7190                                         req->crypto.control_port_over_nl80211;
7191         sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
7192
7193         /* kick off associate process */
7194         ifmgd->assoc_data = assoc_data;
7195
7196         for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7197                 if (!assoc_data->link[i].bss)
7198                         continue;
7199                 if (i == assoc_data->assoc_link_id)
7200                         continue;
7201                 /* only calculate the flags, hence link == NULL */
7202                 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss,
7203                                              &assoc_data->link[i].conn_flags);
7204                 if (err)
7205                         goto err_clear;
7206         }
7207
7208         /* needed for transmitting the assoc frames properly */
7209         memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN);
7210
7211         err = ieee80211_prep_connection(sdata, cbss, req->link_id,
7212                                         req->ap_mld_addr, true, override);
7213         if (err)
7214                 goto err_clear;
7215
7216         assoc_data->link[assoc_data->assoc_link_id].conn_flags =
7217                 link->u.mgd.conn_flags;
7218
7219         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
7220                 const struct cfg80211_bss_ies *beacon_ies;
7221
7222                 rcu_read_lock();
7223                 beacon_ies = rcu_dereference(req->bss->beacon_ies);
7224                 if (!beacon_ies) {
7225                         /*
7226                          * Wait up to one beacon interval ...
7227                          * should this be more if we miss one?
7228                          */
7229                         sdata_info(sdata, "waiting for beacon from %pM\n",
7230                                    link->u.mgd.bssid);
7231                         assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
7232                         assoc_data->timeout_started = true;
7233                         assoc_data->need_beacon = true;
7234                 }
7235                 rcu_read_unlock();
7236         }
7237
7238         run_again(sdata, assoc_data->timeout);
7239
7240         return 0;
7241  err_clear:
7242         eth_zero_addr(sdata->deflink.u.mgd.bssid);
7243         ieee80211_link_info_change_notify(sdata, &sdata->deflink,
7244                                           BSS_CHANGED_BSSID);
7245         ifmgd->assoc_data = NULL;
7246  err_free:
7247         kfree(assoc_data);
7248         return err;
7249 }
7250
7251 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
7252                          struct cfg80211_deauth_request *req)
7253 {
7254         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7255         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7256         bool tx = !req->local_state_change;
7257         struct ieee80211_prep_tx_info info = {
7258                 .subtype = IEEE80211_STYPE_DEAUTH,
7259         };
7260
7261         if (ifmgd->auth_data &&
7262             ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) {
7263                 sdata_info(sdata,
7264                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
7265                            req->bssid, req->reason_code,
7266                            ieee80211_get_reason_code_string(req->reason_code));
7267
7268                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7269                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7270                                                IEEE80211_STYPE_DEAUTH,
7271                                                req->reason_code, tx,
7272                                                frame_buf);
7273                 ieee80211_destroy_auth_data(sdata, false);
7274                 ieee80211_report_disconnect(sdata, frame_buf,
7275                                             sizeof(frame_buf), true,
7276                                             req->reason_code, false);
7277                 drv_mgd_complete_tx(sdata->local, sdata, &info);
7278                 return 0;
7279         }
7280
7281         if (ifmgd->assoc_data &&
7282             ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) {
7283                 sdata_info(sdata,
7284                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
7285                            req->bssid, req->reason_code,
7286                            ieee80211_get_reason_code_string(req->reason_code));
7287
7288                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7289                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7290                                                IEEE80211_STYPE_DEAUTH,
7291                                                req->reason_code, tx,
7292                                                frame_buf);
7293                 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
7294                 ieee80211_report_disconnect(sdata, frame_buf,
7295                                             sizeof(frame_buf), true,
7296                                             req->reason_code, false);
7297                 drv_mgd_complete_tx(sdata->local, sdata, &info);
7298                 return 0;
7299         }
7300
7301         if (ifmgd->associated &&
7302             ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) {
7303                 sdata_info(sdata,
7304                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
7305                            req->bssid, req->reason_code,
7306                            ieee80211_get_reason_code_string(req->reason_code));
7307
7308                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7309                                        req->reason_code, tx, frame_buf);
7310                 ieee80211_report_disconnect(sdata, frame_buf,
7311                                             sizeof(frame_buf), true,
7312                                             req->reason_code, false);
7313                 drv_mgd_complete_tx(sdata->local, sdata, &info);
7314                 return 0;
7315         }
7316
7317         return -ENOTCONN;
7318 }
7319
7320 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
7321                            struct cfg80211_disassoc_request *req)
7322 {
7323         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7324
7325         if (!sdata->u.mgd.associated ||
7326             memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
7327                 return -ENOTCONN;
7328
7329         sdata_info(sdata,
7330                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
7331                    req->ap_addr, req->reason_code,
7332                    ieee80211_get_reason_code_string(req->reason_code));
7333
7334         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
7335                                req->reason_code, !req->local_state_change,
7336                                frame_buf);
7337
7338         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
7339                                     req->reason_code, false);
7340
7341         return 0;
7342 }
7343
7344 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
7345 {
7346         cancel_work_sync(&link->u.mgd.request_smps_work);
7347         cancel_work_sync(&link->u.mgd.chswitch_work);
7348 }
7349
7350 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
7351 {
7352         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7353
7354         /*
7355          * Make sure some work items will not run after this,
7356          * they will not do anything but might not have been
7357          * cancelled when disconnecting.
7358          */
7359         cancel_work_sync(&ifmgd->monitor_work);
7360         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
7361         cancel_work_sync(&ifmgd->csa_connection_drop_work);
7362         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
7363
7364         sdata_lock(sdata);
7365         if (ifmgd->assoc_data)
7366                 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
7367         if (ifmgd->auth_data)
7368                 ieee80211_destroy_auth_data(sdata, false);
7369         spin_lock_bh(&ifmgd->teardown_lock);
7370         if (ifmgd->teardown_skb) {
7371                 kfree_skb(ifmgd->teardown_skb);
7372                 ifmgd->teardown_skb = NULL;
7373                 ifmgd->orig_teardown_skb = NULL;
7374         }
7375         kfree(ifmgd->assoc_req_ies);
7376         ifmgd->assoc_req_ies = NULL;
7377         ifmgd->assoc_req_ies_len = 0;
7378         spin_unlock_bh(&ifmgd->teardown_lock);
7379         del_timer_sync(&ifmgd->timer);
7380         sdata_unlock(sdata);
7381 }
7382
7383 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
7384                                enum nl80211_cqm_rssi_threshold_event rssi_event,
7385                                s32 rssi_level,
7386                                gfp_t gfp)
7387 {
7388         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7389
7390         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
7391
7392         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
7393 }
7394 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
7395
7396 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
7397 {
7398         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7399
7400         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
7401
7402         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
7403 }
7404 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
7405
7406 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
7407                                             int rssi_min_thold,
7408                                             int rssi_max_thold)
7409 {
7410         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
7411
7412         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
7413                 return;
7414
7415         /*
7416          * Scale up threshold values before storing it, as the RSSI averaging
7417          * algorithm uses a scaled up value as well. Change this scaling
7418          * factor if the RSSI averaging algorithm changes.
7419          */
7420         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
7421         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
7422 }
7423
7424 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
7425                                     int rssi_min_thold,
7426                                     int rssi_max_thold)
7427 {
7428         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7429
7430         WARN_ON(rssi_min_thold == rssi_max_thold ||
7431                 rssi_min_thold > rssi_max_thold);
7432
7433         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
7434                                        rssi_max_thold);
7435 }
7436 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
7437
7438 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
7439 {
7440         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7441
7442         _ieee80211_enable_rssi_reports(sdata, 0, 0);
7443 }
7444 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);