net/mac80211/mlme.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * BSS client mode implementation
   4  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   5  * Copyright 2004, Instant802 Networks, Inc.
   6  * Copyright 2005, Devicescape Software, Inc.
   7  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   8  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   9  * Copyright 2013-2014  Intel Mobile Communications GmbH
  10  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  11  * Copyright (C) 2018 - 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 added = false;
1147         int i, j;
1148         u8 *len, *list_len = NULL;
1149
1150         skb_put_u8(skb, WLAN_EID_EXTENSION);
1151         len = skb_put(skb, 1);
1152         skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE);
1153
1154         for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
1155                 u16 elem = outer[i];
1156                 bool have_inner = false;
1157                 bool at_extension = 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         }
1187
1188         if (!added)
1189                 skb_trim(skb, skb_len);
1190         else
1191                 *len = skb->len - skb_len - 2;
1192 }
1193
1194 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1195                                         struct sk_buff *skb, u16 capab,
1196                                         const struct element *ext_capa,
1197                                         const u16 *outer_present_elems)
1198 {
1199         struct ieee80211_local *local = sdata->local;
1200         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1201         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1202         struct ieee80211_multi_link_elem *ml_elem;
1203         struct ieee80211_mle_basic_common_info *common;
1204         const struct wiphy_iftype_ext_capab *ift_ext_capa;
1205         __le16 eml_capa = 0, mld_capa_ops = 0;
1206         unsigned int link_id;
1207         u8 *ml_elem_len;
1208         void *capab_pos;
1209
1210         if (!sdata->vif.valid_links)
1211                 return;
1212
1213         ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy,
1214                                                     ieee80211_vif_type_p2p(&sdata->vif));
1215         if (ift_ext_capa) {
1216                 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
1217                 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
1218         }
1219
1220         skb_put_u8(skb, WLAN_EID_EXTENSION);
1221         ml_elem_len = skb_put(skb, 1);
1222         skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
1223         ml_elem = skb_put(skb, sizeof(*ml_elem));
1224         ml_elem->control =
1225                 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
1226                             IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
1227         common = skb_put(skb, sizeof(*common));
1228         common->len = sizeof(*common) +
1229                       2;  /* MLD capa/ops */
1230         memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1231
1232         /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */
1233         if (eml_capa &
1234             cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP |
1235                          IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
1236                 common->len += 2; /* EML capabilities */
1237                 ml_elem->control |=
1238                         cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
1239                 skb_put_data(skb, &eml_capa, sizeof(eml_capa));
1240         }
1241         /* need indication from userspace to support this */
1242         mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP);
1243         skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops));
1244
1245         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1246                 u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
1247                 const u8 *extra_elems;
1248                 size_t extra_elems_len;
1249                 size_t extra_used;
1250                 u8 *subelem_len = NULL;
1251                 __le16 ctrl;
1252
1253                 if (!assoc_data->link[link_id].bss ||
1254                     link_id == assoc_data->assoc_link_id)
1255                         continue;
1256
1257                 extra_elems = assoc_data->link[link_id].elems;
1258                 extra_elems_len = assoc_data->link[link_id].elems_len;
1259
1260                 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
1261                 subelem_len = skb_put(skb, 1);
1262
1263                 ctrl = cpu_to_le16(link_id |
1264                                    IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
1265                                    IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
1266                 skb_put_data(skb, &ctrl, sizeof(ctrl));
1267                 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */
1268                 skb_put_data(skb, assoc_data->link[link_id].addr,
1269                              ETH_ALEN);
1270                 /*
1271                  * Now add the contents of the (re)association request,
1272                  * but the "listen interval" and "current AP address"
1273                  * (if applicable) are skipped. So we only have
1274                  * the capability field (remember the position and fill
1275                  * later), followed by the elements added below by
1276                  * calling ieee80211_assoc_link_elems().
1277                  */
1278                 capab_pos = skb_put(skb, 2);
1279
1280                 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab,
1281                                                         ext_capa,
1282                                                         extra_elems,
1283                                                         extra_elems_len,
1284                                                         link_id, NULL,
1285                                                         link_present_elems);
1286                 if (extra_elems)
1287                         skb_put_data(skb, extra_elems + extra_used,
1288                                      extra_elems_len - extra_used);
1289
1290                 put_unaligned_le16(capab, capab_pos);
1291
1292                 ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
1293                                                    link_present_elems);
1294
1295                 ieee80211_fragment_element(skb, subelem_len);
1296         }
1297
1298         ieee80211_fragment_element(skb, ml_elem_len);
1299 }
1300
1301 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
1302 {
1303         struct ieee80211_local *local = sdata->local;
1304         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1305         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1306         struct ieee80211_link_data *link;
1307         struct sk_buff *skb;
1308         struct ieee80211_mgmt *mgmt;
1309         u8 *pos, qos_info, *ie_start;
1310         size_t offset, noffset;
1311         u16 capab = WLAN_CAPABILITY_ESS, link_capab;
1312         __le16 listen_int;
1313         struct element *ext_capa = NULL;
1314         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1315         struct ieee80211_prep_tx_info info = {};
1316         unsigned int link_id, n_links = 0;
1317         u16 present_elems[PRESENT_ELEMS_MAX] = {};
1318         void *capab_pos;
1319         size_t size;
1320         int ret;
1321
1322         /* we know it's writable, cast away the const */
1323         if (assoc_data->ie_len)
1324                 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
1325                                                       assoc_data->ie,
1326                                                       assoc_data->ie_len);
1327
1328         sdata_assert_lock(sdata);
1329
1330         size = local->hw.extra_tx_headroom +
1331                sizeof(*mgmt) + /* bit too much but doesn't matter */
1332                2 + assoc_data->ssid_len + /* SSID */
1333                assoc_data->ie_len + /* extra IEs */
1334                (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
1335                9; /* WMM */
1336
1337         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1338                 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1339                 const struct ieee80211_sband_iftype_data *iftd;
1340                 struct ieee80211_supported_band *sband;
1341
1342                 if (!cbss)
1343                         continue;
1344
1345                 sband = local->hw.wiphy->bands[cbss->channel->band];
1346
1347                 n_links++;
1348                 /* add STA profile elements length */
1349                 size += assoc_data->link[link_id].elems_len;
1350                 /* and supported rates length */
1351                 size += 4 + sband->n_bitrates;
1352                 /* supported channels */
1353                 size += 2 + 2 * sband->n_channels;
1354
1355                 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1356                 if (iftd)
1357                         size += iftd->vendor_elems.len;
1358
1359                 /* power capability */
1360                 size += 4;
1361
1362                 /* HT, VHT, HE, EHT */
1363                 size += 2 + sizeof(struct ieee80211_ht_cap);
1364                 size += 2 + sizeof(struct ieee80211_vht_cap);
1365                 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
1366                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1367                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1368
1369                 if (sband->band == NL80211_BAND_6GHZ)
1370                         size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa);
1371
1372                 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
1373                         sizeof(struct ieee80211_eht_mcs_nss_supp) +
1374                         IEEE80211_EHT_PPE_THRES_MAX_LEN;
1375
1376                 /* non-inheritance element */
1377                 size += 2 + 2 + PRESENT_ELEMS_MAX;
1378
1379                 /* should be the same across all BSSes */
1380                 if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
1381                         capab |= WLAN_CAPABILITY_PRIVACY;
1382         }
1383
1384         if (sdata->vif.valid_links) {
1385                 /* consider the multi-link element with STA profile */
1386                 size += sizeof(struct ieee80211_multi_link_elem);
1387                 /* max common info field in basic multi-link element */
1388                 size += sizeof(struct ieee80211_mle_basic_common_info) +
1389                         2 + /* capa & op */
1390                         2; /* EML capa */
1391
1392                 /*
1393                  * The capability elements were already considered above;
1394                  * note this over-estimates a bit because there's no
1395                  * STA profile for the assoc link.
1396                  */
1397                 size += (n_links - 1) *
1398                         (1 + 1 + /* subelement ID/length */
1399                          2 + /* STA control */
1400                          1 + ETH_ALEN + 2 /* STA Info field */);
1401         }
1402
1403         link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
1404         if (WARN_ON(!link))
1405                 return -EINVAL;
1406
1407         if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
1408                 return -EINVAL;
1409
1410         skb = alloc_skb(size, GFP_KERNEL);
1411         if (!skb)
1412                 return -ENOMEM;
1413
1414         skb_reserve(skb, local->hw.extra_tx_headroom);
1415
1416         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
1417                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
1418
1419         /* Set MBSSID support for HE AP if needed */
1420         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
1421             !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
1422             ext_capa && ext_capa->datalen >= 3)
1423                 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1424
1425         mgmt = skb_put_zero(skb, 24);
1426         memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
1427         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1428         memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
1429
1430         listen_int = cpu_to_le16(assoc_data->s1g ?
1431                         ieee80211_encode_usf(local->hw.conf.listen_interval) :
1432                         local->hw.conf.listen_interval);
1433         if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) {
1434                 skb_put(skb, 10);
1435                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1436                                                   IEEE80211_STYPE_REASSOC_REQ);
1437                 capab_pos = &mgmt->u.reassoc_req.capab_info;
1438                 mgmt->u.reassoc_req.listen_interval = listen_int;
1439                 memcpy(mgmt->u.reassoc_req.current_ap,
1440                        assoc_data->prev_ap_addr, ETH_ALEN);
1441                 info.subtype = IEEE80211_STYPE_REASSOC_REQ;
1442         } else {
1443                 skb_put(skb, 4);
1444                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1445                                                   IEEE80211_STYPE_ASSOC_REQ);
1446                 capab_pos = &mgmt->u.assoc_req.capab_info;
1447                 mgmt->u.assoc_req.listen_interval = listen_int;
1448                 info.subtype = IEEE80211_STYPE_ASSOC_REQ;
1449         }
1450
1451         /* SSID */
1452         pos = skb_put(skb, 2 + assoc_data->ssid_len);
1453         ie_start = pos;
1454         *pos++ = WLAN_EID_SSID;
1455         *pos++ = assoc_data->ssid_len;
1456         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
1457
1458         /* add the elements for the assoc (main) link */
1459         link_capab = capab;
1460         offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
1461                                             ext_capa,
1462                                             assoc_data->ie,
1463                                             assoc_data->ie_len,
1464                                             assoc_data->assoc_link_id, link,
1465                                             present_elems);
1466         put_unaligned_le16(link_capab, capab_pos);
1467
1468         /* if present, add any custom non-vendor IEs */
1469         if (assoc_data->ie_len) {
1470                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1471                                                     assoc_data->ie_len,
1472                                                     offset);
1473                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1474                 offset = noffset;
1475         }
1476
1477         if (assoc_data->wmm) {
1478                 if (assoc_data->uapsd) {
1479                         qos_info = ifmgd->uapsd_queues;
1480                         qos_info |= (ifmgd->uapsd_max_sp_len <<
1481                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1482                 } else {
1483                         qos_info = 0;
1484                 }
1485
1486                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1487         }
1488
1489         /* add any remaining custom (i.e. vendor specific here) IEs */
1490         if (assoc_data->ie_len) {
1491                 noffset = assoc_data->ie_len;
1492                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1493         }
1494
1495         if (assoc_data->fils_kek_len) {
1496                 ret = fils_encrypt_assoc_req(skb, assoc_data);
1497                 if (ret < 0) {
1498                         dev_kfree_skb(skb);
1499                         return ret;
1500                 }
1501         }
1502
1503         pos = skb_tail_pointer(skb);
1504         kfree(ifmgd->assoc_req_ies);
1505         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1506         if (!ifmgd->assoc_req_ies) {
1507                 dev_kfree_skb(skb);
1508                 return -ENOMEM;
1509         }
1510
1511         ifmgd->assoc_req_ies_len = pos - ie_start;
1512
1513         drv_mgd_prepare_tx(local, sdata, &info);
1514
1515         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1516         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1517                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1518                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
1519         ieee80211_tx_skb(sdata, skb);
1520
1521         return 0;
1522 }
1523
1524 void ieee80211_send_pspoll(struct ieee80211_local *local,
1525                            struct ieee80211_sub_if_data *sdata)
1526 {
1527         struct ieee80211_pspoll *pspoll;
1528         struct sk_buff *skb;
1529
1530         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1531         if (!skb)
1532                 return;
1533
1534         pspoll = (struct ieee80211_pspoll *) skb->data;
1535         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1536
1537         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1538         ieee80211_tx_skb(sdata, skb);
1539 }
1540
1541 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1542                              struct ieee80211_sub_if_data *sdata,
1543                              bool powersave)
1544 {
1545         struct sk_buff *skb;
1546         struct ieee80211_hdr_3addr *nullfunc;
1547         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1548
1549         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1,
1550                                      !ieee80211_hw_check(&local->hw,
1551                                                          DOESNT_SUPPORT_QOS_NDP));
1552         if (!skb)
1553                 return;
1554
1555         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1556         if (powersave)
1557                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1558
1559         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1560                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1561
1562         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1563                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1564
1565         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1566                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1567
1568         ieee80211_tx_skb(sdata, skb);
1569 }
1570
1571 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1572                                    struct ieee80211_sub_if_data *sdata)
1573 {
1574         struct sk_buff *skb;
1575         struct ieee80211_hdr *nullfunc;
1576         __le16 fc;
1577
1578         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1579                 return;
1580
1581         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1582         if (!skb)
1583                 return;
1584
1585         skb_reserve(skb, local->hw.extra_tx_headroom);
1586
1587         nullfunc = skb_put_zero(skb, 30);
1588         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1589                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1590         nullfunc->frame_control = fc;
1591         memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1592         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1593         memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1594         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1595
1596         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1597         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1598         ieee80211_tx_skb(sdata, skb);
1599 }
1600
1601 /* spectrum management related things */
1602 static void ieee80211_chswitch_work(struct work_struct *work)
1603 {
1604         struct ieee80211_link_data *link =
1605                 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work);
1606         struct ieee80211_sub_if_data *sdata = link->sdata;
1607         struct ieee80211_local *local = sdata->local;
1608         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1609         int ret;
1610
1611         if (!ieee80211_sdata_running(sdata))
1612                 return;
1613
1614         sdata_lock(sdata);
1615         mutex_lock(&local->mtx);
1616         mutex_lock(&local->chanctx_mtx);
1617
1618         if (!ifmgd->associated)
1619                 goto out;
1620
1621         if (!link->conf->csa_active)
1622                 goto out;
1623
1624         /*
1625          * using reservation isn't immediate as it may be deferred until later
1626          * with multi-vif. once reservation is complete it will re-schedule the
1627          * work with no reserved_chanctx so verify chandef to check if it
1628          * completed successfully
1629          */
1630
1631         if (link->reserved_chanctx) {
1632                 /*
1633                  * with multi-vif csa driver may call ieee80211_csa_finish()
1634                  * many times while waiting for other interfaces to use their
1635                  * reservations
1636                  */
1637                 if (link->reserved_ready)
1638                         goto out;
1639
1640                 ret = ieee80211_link_use_reserved_context(link);
1641                 if (ret) {
1642                         sdata_info(sdata,
1643                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1644                                    ret);
1645                         ieee80211_queue_work(&sdata->local->hw,
1646                                              &ifmgd->csa_connection_drop_work);
1647                         goto out;
1648                 }
1649
1650                 goto out;
1651         }
1652
1653         if (!cfg80211_chandef_identical(&link->conf->chandef,
1654                                         &link->csa_chandef)) {
1655                 sdata_info(sdata,
1656                            "failed to finalize channel switch, disconnecting\n");
1657                 ieee80211_queue_work(&sdata->local->hw,
1658                                      &ifmgd->csa_connection_drop_work);
1659                 goto out;
1660         }
1661
1662         link->u.mgd.csa_waiting_bcn = true;
1663
1664         ieee80211_sta_reset_beacon_monitor(sdata);
1665         ieee80211_sta_reset_conn_monitor(sdata);
1666
1667 out:
1668         mutex_unlock(&local->chanctx_mtx);
1669         mutex_unlock(&local->mtx);
1670         sdata_unlock(sdata);
1671 }
1672
1673 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
1674 {
1675         struct ieee80211_sub_if_data *sdata = link->sdata;
1676         struct ieee80211_local *local = sdata->local;
1677         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1678         int ret;
1679
1680         sdata_assert_lock(sdata);
1681
1682         WARN_ON(!link->conf->csa_active);
1683
1684         if (link->csa_block_tx) {
1685                 ieee80211_wake_vif_queues(local, sdata,
1686                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1687                 link->csa_block_tx = false;
1688         }
1689
1690         link->conf->csa_active = false;
1691         link->u.mgd.csa_waiting_bcn = false;
1692         /*
1693          * If the CSA IE is still present on the beacon after the switch,
1694          * we need to consider it as a new CSA (possibly to self).
1695          */
1696         link->u.mgd.beacon_crc_valid = false;
1697
1698         ret = drv_post_channel_switch(sdata);
1699         if (ret) {
1700                 sdata_info(sdata,
1701                            "driver post channel switch failed, disconnecting\n");
1702                 ieee80211_queue_work(&local->hw,
1703                                      &ifmgd->csa_connection_drop_work);
1704                 return;
1705         }
1706
1707         cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0);
1708 }
1709
1710 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1711 {
1712         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1713         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1714
1715         if (WARN_ON(sdata->vif.valid_links))
1716                 success = false;
1717
1718         trace_api_chswitch_done(sdata, success);
1719         if (!success) {
1720                 sdata_info(sdata,
1721                            "driver channel switch failed, disconnecting\n");
1722                 ieee80211_queue_work(&sdata->local->hw,
1723                                      &ifmgd->csa_connection_drop_work);
1724         } else {
1725                 ieee80211_queue_work(&sdata->local->hw,
1726                                      &sdata->deflink.u.mgd.chswitch_work);
1727         }
1728 }
1729 EXPORT_SYMBOL(ieee80211_chswitch_done);
1730
1731 static void ieee80211_chswitch_timer(struct timer_list *t)
1732 {
1733         struct ieee80211_link_data *link =
1734                 from_timer(link, t, u.mgd.chswitch_timer);
1735
1736         ieee80211_queue_work(&link->sdata->local->hw,
1737                              &link->u.mgd.chswitch_work);
1738 }
1739
1740 static void
1741 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
1742 {
1743         struct ieee80211_sub_if_data *sdata = link->sdata;
1744         struct ieee80211_local *local = sdata->local;
1745
1746         if (!local->ops->abort_channel_switch)
1747                 return;
1748
1749         mutex_lock(&local->mtx);
1750
1751         mutex_lock(&local->chanctx_mtx);
1752         ieee80211_link_unreserve_chanctx(link);
1753         mutex_unlock(&local->chanctx_mtx);
1754
1755         if (link->csa_block_tx)
1756                 ieee80211_wake_vif_queues(local, sdata,
1757                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1758
1759         link->csa_block_tx = false;
1760         link->conf->csa_active = false;
1761
1762         mutex_unlock(&local->mtx);
1763
1764         drv_abort_channel_switch(sdata);
1765 }
1766
1767 static void
1768 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
1769                                  u64 timestamp, u32 device_timestamp,
1770                                  struct ieee802_11_elems *elems,
1771                                  bool beacon)
1772 {
1773         struct ieee80211_sub_if_data *sdata = link->sdata;
1774         struct ieee80211_local *local = sdata->local;
1775         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1776         struct cfg80211_bss *cbss = link->u.mgd.bss;
1777         struct ieee80211_chanctx_conf *conf;
1778         struct ieee80211_chanctx *chanctx;
1779         enum nl80211_band current_band;
1780         struct ieee80211_csa_ie csa_ie;
1781         struct ieee80211_channel_switch ch_switch;
1782         struct ieee80211_bss *bss;
1783         int res;
1784
1785         sdata_assert_lock(sdata);
1786
1787         if (!cbss)
1788                 return;
1789
1790         if (local->scanning)
1791                 return;
1792
1793         current_band = cbss->channel->band;
1794         bss = (void *)cbss->priv;
1795         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1796                                            bss->vht_cap_info,
1797                                            link->u.mgd.conn_flags,
1798                                            link->u.mgd.bssid, &csa_ie);
1799
1800         if (!res) {
1801                 ch_switch.timestamp = timestamp;
1802                 ch_switch.device_timestamp = device_timestamp;
1803                 ch_switch.block_tx = csa_ie.mode;
1804                 ch_switch.chandef = csa_ie.chandef;
1805                 ch_switch.count = csa_ie.count;
1806                 ch_switch.delay = csa_ie.max_switch_time;
1807         }
1808
1809         if (res < 0)
1810                 goto lock_and_drop_connection;
1811
1812         if (beacon && link->conf->csa_active &&
1813             !link->u.mgd.csa_waiting_bcn) {
1814                 if (res)
1815                         ieee80211_sta_abort_chanswitch(link);
1816                 else
1817                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1818                 return;
1819         } else if (link->conf->csa_active || res) {
1820                 /* disregard subsequent announcements if already processing */
1821                 return;
1822         }
1823
1824         if (link->conf->chandef.chan->band !=
1825             csa_ie.chandef.chan->band) {
1826                 sdata_info(sdata,
1827                            "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1828                            link->u.mgd.bssid,
1829                            csa_ie.chandef.chan->center_freq,
1830                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1831                            csa_ie.chandef.center_freq2);
1832                 goto lock_and_drop_connection;
1833         }
1834
1835         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1836                                      IEEE80211_CHAN_DISABLED)) {
1837                 sdata_info(sdata,
1838                            "AP %pM switches to unsupported channel "
1839                            "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1840                            "disconnecting\n",
1841                            link->u.mgd.bssid,
1842                            csa_ie.chandef.chan->center_freq,
1843                            csa_ie.chandef.chan->freq_offset,
1844                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1845                            csa_ie.chandef.freq1_offset,
1846                            csa_ie.chandef.center_freq2);
1847                 goto lock_and_drop_connection;
1848         }
1849
1850         if (cfg80211_chandef_identical(&csa_ie.chandef,
1851                                        &link->conf->chandef) &&
1852             (!csa_ie.mode || !beacon)) {
1853                 if (link->u.mgd.csa_ignored_same_chan)
1854                         return;
1855                 sdata_info(sdata,
1856                            "AP %pM tries to chanswitch to same channel, ignore\n",
1857                            link->u.mgd.bssid);
1858                 link->u.mgd.csa_ignored_same_chan = true;
1859                 return;
1860         }
1861
1862         /*
1863          * Drop all TDLS peers - either we disconnect or move to a different
1864          * channel from this point on. There's no telling what our peer will do.
1865          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1866          * have an incompatible wider chandef.
1867          */
1868         ieee80211_teardown_tdls_peers(sdata);
1869
1870         mutex_lock(&local->mtx);
1871         mutex_lock(&local->chanctx_mtx);
1872         conf = rcu_dereference_protected(link->conf->chanctx_conf,
1873                                          lockdep_is_held(&local->chanctx_mtx));
1874         if (!conf) {
1875                 sdata_info(sdata,
1876                            "no channel context assigned to vif?, disconnecting\n");
1877                 goto drop_connection;
1878         }
1879
1880         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1881
1882         if (local->use_chanctx &&
1883             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1884                 sdata_info(sdata,
1885                            "driver doesn't support chan-switch with channel contexts\n");
1886                 goto drop_connection;
1887         }
1888
1889         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1890                 sdata_info(sdata,
1891                            "preparing for channel switch failed, disconnecting\n");
1892                 goto drop_connection;
1893         }
1894
1895         res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef,
1896                                              chanctx->mode, false);
1897         if (res) {
1898                 sdata_info(sdata,
1899                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1900                            res);
1901                 goto drop_connection;
1902         }
1903         mutex_unlock(&local->chanctx_mtx);
1904
1905         link->conf->csa_active = true;
1906         link->csa_chandef = csa_ie.chandef;
1907         link->csa_block_tx = csa_ie.mode;
1908         link->u.mgd.csa_ignored_same_chan = false;
1909         link->u.mgd.beacon_crc_valid = false;
1910
1911         if (link->csa_block_tx)
1912                 ieee80211_stop_vif_queues(local, sdata,
1913                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1914         mutex_unlock(&local->mtx);
1915
1916         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0,
1917                                           csa_ie.count, csa_ie.mode);
1918
1919         if (local->ops->channel_switch) {
1920                 /* use driver's channel switch callback */
1921                 drv_channel_switch(local, sdata, &ch_switch);
1922                 return;
1923         }
1924
1925         /* channel switch handled in software */
1926         if (csa_ie.count <= 1)
1927                 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work);
1928         else
1929                 mod_timer(&link->u.mgd.chswitch_timer,
1930                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1931                                          cbss->beacon_interval));
1932         return;
1933  lock_and_drop_connection:
1934         mutex_lock(&local->mtx);
1935         mutex_lock(&local->chanctx_mtx);
1936  drop_connection:
1937         /*
1938          * This is just so that the disconnect flow will know that
1939          * we were trying to switch channel and failed. In case the
1940          * mode is 1 (we are not allowed to Tx), we will know not to
1941          * send a deauthentication frame. Those two fields will be
1942          * reset when the disconnection worker runs.
1943          */
1944         link->conf->csa_active = true;
1945         link->csa_block_tx = csa_ie.mode;
1946
1947         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1948         mutex_unlock(&local->chanctx_mtx);
1949         mutex_unlock(&local->mtx);
1950 }
1951
1952 static bool
1953 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1954                                  struct ieee80211_channel *channel,
1955                                  const u8 *country_ie, u8 country_ie_len,
1956                                  const u8 *pwr_constr_elem,
1957                                  int *chan_pwr, int *pwr_reduction)
1958 {
1959         struct ieee80211_country_ie_triplet *triplet;
1960         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1961         int i, chan_increment;
1962         bool have_chan_pwr = false;
1963
1964         /* Invalid IE */
1965         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1966                 return false;
1967
1968         triplet = (void *)(country_ie + 3);
1969         country_ie_len -= 3;
1970
1971         switch (channel->band) {
1972         default:
1973                 WARN_ON_ONCE(1);
1974                 fallthrough;
1975         case NL80211_BAND_2GHZ:
1976         case NL80211_BAND_60GHZ:
1977         case NL80211_BAND_LC:
1978                 chan_increment = 1;
1979                 break;
1980         case NL80211_BAND_5GHZ:
1981                 chan_increment = 4;
1982                 break;
1983         case NL80211_BAND_6GHZ:
1984                 /*
1985                  * In the 6 GHz band, the "maximum transmit power level"
1986                  * field in the triplets is reserved, and thus will be
1987                  * zero and we shouldn't use it to control TX power.
1988                  * The actual TX power will be given in the transmit
1989                  * power envelope element instead.
1990                  */
1991                 return false;
1992         }
1993
1994         /* find channel */
1995         while (country_ie_len >= 3) {
1996                 u8 first_channel = triplet->chans.first_channel;
1997
1998                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1999                         goto next;
2000
2001                 for (i = 0; i < triplet->chans.num_channels; i++) {
2002                         if (first_channel + i * chan_increment == chan) {
2003                                 have_chan_pwr = true;
2004                                 *chan_pwr = triplet->chans.max_power;
2005                                 break;
2006                         }
2007                 }
2008                 if (have_chan_pwr)
2009                         break;
2010
2011  next:
2012                 triplet++;
2013                 country_ie_len -= 3;
2014         }
2015
2016         if (have_chan_pwr && pwr_constr_elem)
2017                 *pwr_reduction = *pwr_constr_elem;
2018         else
2019                 *pwr_reduction = 0;
2020
2021         return have_chan_pwr;
2022 }
2023
2024 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
2025                                       struct ieee80211_channel *channel,
2026                                       const u8 *cisco_dtpc_ie,
2027                                       int *pwr_level)
2028 {
2029         /* From practical testing, the first data byte of the DTPC element
2030          * seems to contain the requested dBm level, and the CLI on Cisco
2031          * APs clearly state the range is -127 to 127 dBm, which indicates
2032          * a signed byte, although it seemingly never actually goes negative.
2033          * The other byte seems to always be zero.
2034          */
2035         *pwr_level = (__s8)cisco_dtpc_ie[4];
2036 }
2037
2038 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
2039                                        struct ieee80211_channel *channel,
2040                                        struct ieee80211_mgmt *mgmt,
2041                                        const u8 *country_ie, u8 country_ie_len,
2042                                        const u8 *pwr_constr_ie,
2043                                        const u8 *cisco_dtpc_ie)
2044 {
2045         struct ieee80211_sub_if_data *sdata = link->sdata;
2046         bool has_80211h_pwr = false, has_cisco_pwr = false;
2047         int chan_pwr = 0, pwr_reduction_80211h = 0;
2048         int pwr_level_cisco, pwr_level_80211h;
2049         int new_ap_level;
2050         __le16 capab = mgmt->u.probe_resp.capab_info;
2051
2052         if (ieee80211_is_s1g_beacon(mgmt->frame_control))
2053                 return 0;       /* TODO */
2054
2055         if (country_ie &&
2056             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
2057              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
2058                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
2059                         sdata, channel, country_ie, country_ie_len,
2060                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
2061                 pwr_level_80211h =
2062                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
2063         }
2064
2065         if (cisco_dtpc_ie) {
2066                 ieee80211_find_cisco_dtpc(
2067                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
2068                 has_cisco_pwr = true;
2069         }
2070
2071         if (!has_80211h_pwr && !has_cisco_pwr)
2072                 return 0;
2073
2074         /* If we have both 802.11h and Cisco DTPC, apply both limits
2075          * by picking the smallest of the two power levels advertised.
2076          */
2077         if (has_80211h_pwr &&
2078             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
2079                 new_ap_level = pwr_level_80211h;
2080
2081                 if (link->ap_power_level == new_ap_level)
2082                         return 0;
2083
2084                 sdata_dbg(sdata,
2085                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
2086                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
2087                           link->u.mgd.bssid);
2088         } else {  /* has_cisco_pwr is always true here. */
2089                 new_ap_level = pwr_level_cisco;
2090
2091                 if (link->ap_power_level == new_ap_level)
2092                         return 0;
2093
2094                 sdata_dbg(sdata,
2095                           "Limiting TX power to %d dBm as advertised by %pM\n",
2096                           pwr_level_cisco, link->u.mgd.bssid);
2097         }
2098
2099         link->ap_power_level = new_ap_level;
2100         if (__ieee80211_recalc_txpower(sdata))
2101                 return BSS_CHANGED_TXPOWER;
2102         return 0;
2103 }
2104
2105 /* powersave */
2106 static void ieee80211_enable_ps(struct ieee80211_local *local,
2107                                 struct ieee80211_sub_if_data *sdata)
2108 {
2109         struct ieee80211_conf *conf = &local->hw.conf;
2110
2111         /*
2112          * If we are scanning right now then the parameters will
2113          * take effect when scan finishes.
2114          */
2115         if (local->scanning)
2116                 return;
2117
2118         if (conf->dynamic_ps_timeout > 0 &&
2119             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2120                 mod_timer(&local->dynamic_ps_timer, jiffies +
2121                           msecs_to_jiffies(conf->dynamic_ps_timeout));
2122         } else {
2123                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
2124                         ieee80211_send_nullfunc(local, sdata, true);
2125
2126                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2127                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2128                         return;
2129
2130                 conf->flags |= IEEE80211_CONF_PS;
2131                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2132         }
2133 }
2134
2135 static void ieee80211_change_ps(struct ieee80211_local *local)
2136 {
2137         struct ieee80211_conf *conf = &local->hw.conf;
2138
2139         if (local->ps_sdata) {
2140                 ieee80211_enable_ps(local, local->ps_sdata);
2141         } else if (conf->flags & IEEE80211_CONF_PS) {
2142                 conf->flags &= ~IEEE80211_CONF_PS;
2143                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2144                 del_timer_sync(&local->dynamic_ps_timer);
2145                 cancel_work_sync(&local->dynamic_ps_enable_work);
2146         }
2147 }
2148
2149 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
2150 {
2151         struct ieee80211_local *local = sdata->local;
2152         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
2153         struct sta_info *sta = NULL;
2154         bool authorized = false;
2155
2156         if (!mgd->powersave)
2157                 return false;
2158
2159         if (mgd->broken_ap)
2160                 return false;
2161
2162         if (!mgd->associated)
2163                 return false;
2164
2165         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
2166                 return false;
2167
2168         if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
2169             !sdata->deflink.u.mgd.have_beacon)
2170                 return false;
2171
2172         rcu_read_lock();
2173         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
2174         if (sta)
2175                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2176         rcu_read_unlock();
2177
2178         return authorized;
2179 }
2180
2181 /* need to hold RTNL or interface lock */
2182 void ieee80211_recalc_ps(struct ieee80211_local *local)
2183 {
2184         struct ieee80211_sub_if_data *sdata, *found = NULL;
2185         int count = 0;
2186         int timeout;
2187
2188         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) ||
2189             ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2190                 local->ps_sdata = NULL;
2191                 return;
2192         }
2193
2194         list_for_each_entry(sdata, &local->interfaces, list) {
2195                 if (!ieee80211_sdata_running(sdata))
2196                         continue;
2197                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2198                         /* If an AP vif is found, then disable PS
2199                          * by setting the count to zero thereby setting
2200                          * ps_sdata to NULL.
2201                          */
2202                         count = 0;
2203                         break;
2204                 }
2205                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2206                         continue;
2207                 found = sdata;
2208                 count++;
2209         }
2210
2211         if (count == 1 && ieee80211_powersave_allowed(found)) {
2212                 u8 dtimper = found->deflink.u.mgd.dtim_period;
2213
2214                 timeout = local->dynamic_ps_forced_timeout;
2215                 if (timeout < 0)
2216                         timeout = 100;
2217                 local->hw.conf.dynamic_ps_timeout = timeout;
2218
2219                 /* If the TIM IE is invalid, pretend the value is 1 */
2220                 if (!dtimper)
2221                         dtimper = 1;
2222
2223                 local->hw.conf.ps_dtim_period = dtimper;
2224                 local->ps_sdata = found;
2225         } else {
2226                 local->ps_sdata = NULL;
2227         }
2228
2229         ieee80211_change_ps(local);
2230 }
2231
2232 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
2233 {
2234         bool ps_allowed = ieee80211_powersave_allowed(sdata);
2235
2236         if (sdata->vif.cfg.ps != ps_allowed) {
2237                 sdata->vif.cfg.ps = ps_allowed;
2238                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS);
2239         }
2240 }
2241
2242 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2243 {
2244         struct ieee80211_local *local =
2245                 container_of(work, struct ieee80211_local,
2246                              dynamic_ps_disable_work);
2247
2248         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2249                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2250                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2251         }
2252
2253         ieee80211_wake_queues_by_reason(&local->hw,
2254                                         IEEE80211_MAX_QUEUE_MAP,
2255                                         IEEE80211_QUEUE_STOP_REASON_PS,
2256                                         false);
2257 }
2258
2259 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2260 {
2261         struct ieee80211_local *local =
2262                 container_of(work, struct ieee80211_local,
2263                              dynamic_ps_enable_work);
2264         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
2265         struct ieee80211_if_managed *ifmgd;
2266         unsigned long flags;
2267         int q;
2268
2269         /* can only happen when PS was just disabled anyway */
2270         if (!sdata)
2271                 return;
2272
2273         ifmgd = &sdata->u.mgd;
2274
2275         if (local->hw.conf.flags & IEEE80211_CONF_PS)
2276                 return;
2277
2278         if (local->hw.conf.dynamic_ps_timeout > 0) {
2279                 /* don't enter PS if TX frames are pending */
2280                 if (drv_tx_frames_pending(local)) {
2281                         mod_timer(&local->dynamic_ps_timer, jiffies +
2282                                   msecs_to_jiffies(
2283                                   local->hw.conf.dynamic_ps_timeout));
2284                         return;
2285                 }
2286
2287                 /*
2288                  * transmission can be stopped by others which leads to
2289                  * dynamic_ps_timer expiry. Postpone the ps timer if it
2290                  * is not the actual idle state.
2291                  */
2292                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2293                 for (q = 0; q < local->hw.queues; q++) {
2294                         if (local->queue_stop_reasons[q]) {
2295                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2296                                                        flags);
2297                                 mod_timer(&local->dynamic_ps_timer, jiffies +
2298                                           msecs_to_jiffies(
2299                                           local->hw.conf.dynamic_ps_timeout));
2300                                 return;
2301                         }
2302                 }
2303                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2304         }
2305
2306         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2307             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2308                 if (drv_tx_frames_pending(local)) {
2309                         mod_timer(&local->dynamic_ps_timer, jiffies +
2310                                   msecs_to_jiffies(
2311                                   local->hw.conf.dynamic_ps_timeout));
2312                 } else {
2313                         ieee80211_send_nullfunc(local, sdata, true);
2314                         /* Flush to get the tx status of nullfunc frame */
2315                         ieee80211_flush_queues(local, sdata, false);
2316                 }
2317         }
2318
2319         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
2320               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
2321             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2322                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2323                 local->hw.conf.flags |= IEEE80211_CONF_PS;
2324                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2325         }
2326 }
2327
2328 void ieee80211_dynamic_ps_timer(struct timer_list *t)
2329 {
2330         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
2331
2332         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
2333 }
2334
2335 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
2336 {
2337         struct delayed_work *delayed_work = to_delayed_work(work);
2338         struct ieee80211_link_data *link =
2339                 container_of(delayed_work, struct ieee80211_link_data,
2340                              dfs_cac_timer_work);
2341         struct cfg80211_chan_def chandef = link->conf->chandef;
2342         struct ieee80211_sub_if_data *sdata = link->sdata;
2343
2344         mutex_lock(&sdata->local->mtx);
2345         if (sdata->wdev.cac_started) {
2346                 ieee80211_link_release_channel(link);
2347                 cfg80211_cac_event(sdata->dev, &chandef,
2348                                    NL80211_RADAR_CAC_FINISHED,
2349                                    GFP_KERNEL);
2350         }
2351         mutex_unlock(&sdata->local->mtx);
2352 }
2353
2354 static bool
2355 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2356 {
2357         struct ieee80211_local *local = sdata->local;
2358         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2359         bool ret = false;
2360         int ac;
2361
2362         if (local->hw.queues < IEEE80211_NUM_ACS)
2363                 return false;
2364
2365         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2366                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2367                 int non_acm_ac;
2368                 unsigned long now = jiffies;
2369
2370                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
2371                     tx_tspec->admitted_time &&
2372                     time_after(now, tx_tspec->time_slice_start + HZ)) {
2373                         tx_tspec->consumed_tx_time = 0;
2374                         tx_tspec->time_slice_start = now;
2375
2376                         if (tx_tspec->downgraded)
2377                                 tx_tspec->action =
2378                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
2379                 }
2380
2381                 switch (tx_tspec->action) {
2382                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
2383                         /* take the original parameters */
2384                         if (drv_conf_tx(local, &sdata->deflink, ac,
2385                                         &sdata->deflink.tx_conf[ac]))
2386                                 link_err(&sdata->deflink,
2387                                          "failed to set TX queue parameters for queue %d\n",
2388                                          ac);
2389                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
2390                         tx_tspec->downgraded = false;
2391                         ret = true;
2392                         break;
2393                 case TX_TSPEC_ACTION_DOWNGRADE:
2394                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2395                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2396                                 ret = true;
2397                                 break;
2398                         }
2399                         /* downgrade next lower non-ACM AC */
2400                         for (non_acm_ac = ac + 1;
2401                              non_acm_ac < IEEE80211_NUM_ACS;
2402                              non_acm_ac++)
2403                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
2404                                         break;
2405                         /* Usually the loop will result in using BK even if it
2406                          * requires admission control, but such a configuration
2407                          * makes no sense and we have to transmit somehow - the
2408                          * AC selection does the same thing.
2409                          * If we started out trying to downgrade from BK, then
2410                          * the extra condition here might be needed.
2411                          */
2412                         if (non_acm_ac >= IEEE80211_NUM_ACS)
2413                                 non_acm_ac = IEEE80211_AC_BK;
2414                         if (drv_conf_tx(local, &sdata->deflink, ac,
2415                                         &sdata->deflink.tx_conf[non_acm_ac]))
2416                                 link_err(&sdata->deflink,
2417                                          "failed to set TX queue parameters for queue %d\n",
2418                                          ac);
2419                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
2420                         ret = true;
2421                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
2422                                 tx_tspec->time_slice_start + HZ - now + 1);
2423                         break;
2424                 case TX_TSPEC_ACTION_NONE:
2425                         /* nothing now */
2426                         break;
2427                 }
2428         }
2429
2430         return ret;
2431 }
2432
2433 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2434 {
2435         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2436                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
2437                                                   BSS_CHANGED_QOS);
2438 }
2439
2440 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
2441 {
2442         struct ieee80211_sub_if_data *sdata;
2443
2444         sdata = container_of(work, struct ieee80211_sub_if_data,
2445                              u.mgd.tx_tspec_wk.work);
2446         ieee80211_sta_handle_tspec_ac_params(sdata);
2447 }
2448
2449 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
2450 {
2451         struct ieee80211_sub_if_data *sdata = link->sdata;
2452         struct ieee80211_local *local = sdata->local;
2453         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2454         struct ieee80211_tx_queue_params *params = link->tx_conf;
2455         u8 ac;
2456
2457         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2458                 mlme_dbg(sdata,
2459                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2460                          ac, params[ac].acm,
2461                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2462                          params[ac].txop, params[ac].uapsd,
2463                          ifmgd->tx_tspec[ac].downgraded);
2464                 if (!ifmgd->tx_tspec[ac].downgraded &&
2465                     drv_conf_tx(local, link, ac, &params[ac]))
2466                         link_err(link,
2467                                  "failed to set TX queue parameters for AC %d\n",
2468                                  ac);
2469         }
2470 }
2471
2472 /* MLME */
2473 static bool
2474 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2475                          struct ieee80211_link_data *link,
2476                          const u8 *wmm_param, size_t wmm_param_len,
2477                          const struct ieee80211_mu_edca_param_set *mu_edca)
2478 {
2479         struct ieee80211_sub_if_data *sdata = link->sdata;
2480         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2481         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2482         size_t left;
2483         int count, mu_edca_count, ac;
2484         const u8 *pos;
2485         u8 uapsd_queues = 0;
2486
2487         if (!local->ops->conf_tx)
2488                 return false;
2489
2490         if (local->hw.queues < IEEE80211_NUM_ACS)
2491                 return false;
2492
2493         if (!wmm_param)
2494                 return false;
2495
2496         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2497                 return false;
2498
2499         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2500                 uapsd_queues = ifmgd->uapsd_queues;
2501
2502         count = wmm_param[6] & 0x0f;
2503         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2504          * if mu_edca was preset before and now it disappeared tell
2505          * the driver about it.
2506          */
2507         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2508         if (count == link->u.mgd.wmm_last_param_set &&
2509             mu_edca_count == link->u.mgd.mu_edca_last_param_set)
2510                 return false;
2511         link->u.mgd.wmm_last_param_set = count;
2512         link->u.mgd.mu_edca_last_param_set = mu_edca_count;
2513
2514         pos = wmm_param + 8;
2515         left = wmm_param_len - 8;
2516
2517         memset(&params, 0, sizeof(params));
2518
2519         sdata->wmm_acm = 0;
2520         for (; left >= 4; left -= 4, pos += 4) {
2521                 int aci = (pos[0] >> 5) & 0x03;
2522                 int acm = (pos[0] >> 4) & 0x01;
2523                 bool uapsd = false;
2524
2525                 switch (aci) {
2526                 case 1: /* AC_BK */
2527                         ac = IEEE80211_AC_BK;
2528                         if (acm)
2529                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2530                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2531                                 uapsd = true;
2532                         params[ac].mu_edca = !!mu_edca;
2533                         if (mu_edca)
2534                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2535                         break;
2536                 case 2: /* AC_VI */
2537                         ac = IEEE80211_AC_VI;
2538                         if (acm)
2539                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2540                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2541                                 uapsd = true;
2542                         params[ac].mu_edca = !!mu_edca;
2543                         if (mu_edca)
2544                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2545                         break;
2546                 case 3: /* AC_VO */
2547                         ac = IEEE80211_AC_VO;
2548                         if (acm)
2549                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2550                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2551                                 uapsd = true;
2552                         params[ac].mu_edca = !!mu_edca;
2553                         if (mu_edca)
2554                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2555                         break;
2556                 case 0: /* AC_BE */
2557                 default:
2558                         ac = IEEE80211_AC_BE;
2559                         if (acm)
2560                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2561                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2562                                 uapsd = true;
2563                         params[ac].mu_edca = !!mu_edca;
2564                         if (mu_edca)
2565                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2566                         break;
2567                 }
2568
2569                 params[ac].aifs = pos[0] & 0x0f;
2570
2571                 if (params[ac].aifs < 2) {
2572                         sdata_info(sdata,
2573                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2574                                    params[ac].aifs, aci);
2575                         params[ac].aifs = 2;
2576                 }
2577                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2578                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2579                 params[ac].txop = get_unaligned_le16(pos + 2);
2580                 params[ac].acm = acm;
2581                 params[ac].uapsd = uapsd;
2582
2583                 if (params[ac].cw_min == 0 ||
2584                     params[ac].cw_min > params[ac].cw_max) {
2585                         sdata_info(sdata,
2586                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2587                                    params[ac].cw_min, params[ac].cw_max, aci);
2588                         return false;
2589                 }
2590                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2591         }
2592
2593         /* WMM specification requires all 4 ACIs. */
2594         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2595                 if (params[ac].cw_min == 0) {
2596                         sdata_info(sdata,
2597                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2598                                    ac);
2599                         return false;
2600                 }
2601         }
2602
2603         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2604                 link->tx_conf[ac] = params[ac];
2605
2606         ieee80211_mgd_set_link_qos_params(link);
2607
2608         /* enable WMM or activate new settings */
2609         link->conf->qos = true;
2610         return true;
2611 }
2612
2613 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2614 {
2615         lockdep_assert_held(&sdata->local->mtx);
2616
2617         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2618         ieee80211_run_deferred_scan(sdata->local);
2619 }
2620
2621 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2622 {
2623         mutex_lock(&sdata->local->mtx);
2624         __ieee80211_stop_poll(sdata);
2625         mutex_unlock(&sdata->local->mtx);
2626 }
2627
2628 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
2629                                            u16 capab, bool erp_valid, u8 erp)
2630 {
2631         struct ieee80211_bss_conf *bss_conf = link->conf;
2632         struct ieee80211_supported_band *sband;
2633         u32 changed = 0;
2634         bool use_protection;
2635         bool use_short_preamble;
2636         bool use_short_slot;
2637
2638         sband = ieee80211_get_link_sband(link);
2639         if (!sband)
2640                 return changed;
2641
2642         if (erp_valid) {
2643                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2644                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2645         } else {
2646                 use_protection = false;
2647                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2648         }
2649
2650         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2651         if (sband->band == NL80211_BAND_5GHZ ||
2652             sband->band == NL80211_BAND_6GHZ)
2653                 use_short_slot = true;
2654
2655         if (use_protection != bss_conf->use_cts_prot) {
2656                 bss_conf->use_cts_prot = use_protection;
2657                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2658         }
2659
2660         if (use_short_preamble != bss_conf->use_short_preamble) {
2661                 bss_conf->use_short_preamble = use_short_preamble;
2662                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2663         }
2664
2665         if (use_short_slot != bss_conf->use_short_slot) {
2666                 bss_conf->use_short_slot = use_short_slot;
2667                 changed |= BSS_CHANGED_ERP_SLOT;
2668         }
2669
2670         return changed;
2671 }
2672
2673 static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link,
2674                                          struct cfg80211_bss *cbss)
2675 {
2676         struct ieee80211_sub_if_data *sdata = link->sdata;
2677         struct ieee80211_bss_conf *bss_conf = link->conf;
2678         struct ieee80211_bss *bss = (void *)cbss->priv;
2679         u32 changed = BSS_CHANGED_QOS;
2680
2681         /* not really used in MLO */
2682         sdata->u.mgd.beacon_timeout =
2683                 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count *
2684                                                       bss_conf->beacon_int));
2685
2686         changed |= ieee80211_handle_bss_capability(link,
2687                                                    bss_conf->assoc_capability,
2688                                                    bss->has_erp_value,
2689                                                    bss->erp_value);
2690
2691         ieee80211_check_rate_mask(link);
2692
2693         link->u.mgd.bss = cbss;
2694         memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2695
2696         if (sdata->vif.p2p ||
2697             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2698                 const struct cfg80211_bss_ies *ies;
2699
2700                 rcu_read_lock();
2701                 ies = rcu_dereference(cbss->ies);
2702                 if (ies) {
2703                         int ret;
2704
2705                         ret = cfg80211_get_p2p_attr(
2706                                         ies->data, ies->len,
2707                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2708                                         (u8 *) &bss_conf->p2p_noa_attr,
2709                                         sizeof(bss_conf->p2p_noa_attr));
2710                         if (ret >= 2) {
2711                                 link->u.mgd.p2p_noa_index =
2712                                         bss_conf->p2p_noa_attr.index;
2713                                 changed |= BSS_CHANGED_P2P_PS;
2714                         }
2715                 }
2716                 rcu_read_unlock();
2717         }
2718
2719         if (link->u.mgd.have_beacon) {
2720                 /*
2721                  * If the AP is buggy we may get here with no DTIM period
2722                  * known, so assume it's 1 which is the only safe assumption
2723                  * in that case, although if the TIM IE is broken powersave
2724                  * probably just won't work at all.
2725                  */
2726                 bss_conf->dtim_period = link->u.mgd.dtim_period ?: 1;
2727                 bss_conf->beacon_rate = bss->beacon_rate;
2728                 changed |= BSS_CHANGED_BEACON_INFO;
2729         } else {
2730                 bss_conf->beacon_rate = NULL;
2731                 bss_conf->dtim_period = 0;
2732         }
2733
2734         /* Tell the driver to monitor connection quality (if supported) */
2735         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2736             bss_conf->cqm_rssi_thold)
2737                 changed |= BSS_CHANGED_CQM;
2738
2739         return changed;
2740 }
2741
2742 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2743                                      struct ieee80211_mgd_assoc_data *assoc_data,
2744                                      u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
2745 {
2746         struct ieee80211_local *local = sdata->local;
2747         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
2748         u64 vif_changed = BSS_CHANGED_ASSOC;
2749         unsigned int link_id;
2750
2751         sdata->u.mgd.associated = true;
2752
2753         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
2754                 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2755                 struct ieee80211_link_data *link;
2756
2757                 if (!cbss)
2758                         continue;
2759
2760                 link = sdata_dereference(sdata->link[link_id], sdata);
2761                 if (WARN_ON(!link))
2762                         return;
2763
2764                 changed[link_id] |= ieee80211_link_set_associated(link, cbss);
2765         }
2766
2767         /* just to be sure */
2768         ieee80211_stop_poll(sdata);
2769
2770         ieee80211_led_assoc(local, 1);
2771
2772         vif_cfg->assoc = 1;
2773
2774         /* Enable ARP filtering */
2775         if (vif_cfg->arp_addr_cnt)
2776                 vif_changed |= BSS_CHANGED_ARP_FILTER;
2777
2778         if (sdata->vif.valid_links) {
2779                 for (link_id = 0;
2780                      link_id < IEEE80211_MLD_MAX_NUM_LINKS;
2781                      link_id++) {
2782                         struct ieee80211_link_data *link;
2783                         struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2784
2785                         if (!cbss)
2786                                 continue;
2787
2788                         link = sdata_dereference(sdata->link[link_id], sdata);
2789                         if (WARN_ON(!link))
2790                                 return;
2791
2792                         ieee80211_link_info_change_notify(sdata, link,
2793                                                           changed[link_id]);
2794
2795                         ieee80211_recalc_smps(sdata, link);
2796                 }
2797
2798                 ieee80211_vif_cfg_change_notify(sdata, vif_changed);
2799         } else {
2800                 ieee80211_bss_info_change_notify(sdata,
2801                                                  vif_changed | changed[0]);
2802         }
2803
2804         mutex_lock(&local->iflist_mtx);
2805         ieee80211_recalc_ps(local);
2806         mutex_unlock(&local->iflist_mtx);
2807
2808         /* leave this here to not change ordering in non-MLO cases */
2809         if (!sdata->vif.valid_links)
2810                 ieee80211_recalc_smps(sdata, &sdata->deflink);
2811         ieee80211_recalc_ps_vif(sdata);
2812
2813         netif_carrier_on(sdata->dev);
2814 }
2815
2816 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2817                                    u16 stype, u16 reason, bool tx,
2818                                    u8 *frame_buf)
2819 {
2820         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2821         struct ieee80211_local *local = sdata->local;
2822         unsigned int link_id;
2823         u32 changed = 0;
2824         struct ieee80211_prep_tx_info info = {
2825                 .subtype = stype,
2826         };
2827
2828         sdata_assert_lock(sdata);
2829
2830         if (WARN_ON_ONCE(tx && !frame_buf))
2831                 return;
2832
2833         if (WARN_ON(!ifmgd->associated))
2834                 return;
2835
2836         ieee80211_stop_poll(sdata);
2837
2838         ifmgd->associated = false;
2839
2840         /* other links will be destroyed */
2841         sdata->deflink.u.mgd.bss = NULL;
2842
2843         netif_carrier_off(sdata->dev);
2844
2845         /*
2846          * if we want to get out of ps before disassoc (why?) we have
2847          * to do it before sending disassoc, as otherwise the null-packet
2848          * won't be valid.
2849          */
2850         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2851                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2852                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2853         }
2854         local->ps_sdata = NULL;
2855
2856         /* disable per-vif ps */
2857         ieee80211_recalc_ps_vif(sdata);
2858
2859         /* make sure ongoing transmission finishes */
2860         synchronize_net();
2861
2862         /*
2863          * drop any frame before deauth/disassoc, this can be data or
2864          * management frame. Since we are disconnecting, we should not
2865          * insist sending these frames which can take time and delay
2866          * the disconnection and possible the roaming.
2867          */
2868         if (tx)
2869                 ieee80211_flush_queues(local, sdata, true);
2870
2871         /* deauthenticate/disassociate now */
2872         if (tx || frame_buf) {
2873                 /*
2874                  * In multi channel scenarios guarantee that the virtual
2875                  * interface is granted immediate airtime to transmit the
2876                  * deauthentication frame by calling mgd_prepare_tx, if the
2877                  * driver requested so.
2878                  */
2879                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2880                     !sdata->deflink.u.mgd.have_beacon) {
2881                         drv_mgd_prepare_tx(sdata->local, sdata, &info);
2882                 }
2883
2884                 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr,
2885                                                sdata->vif.cfg.ap_addr, stype,
2886                                                reason, tx, frame_buf);
2887         }
2888
2889         /* flush out frame - make sure the deauth was actually sent */
2890         if (tx)
2891                 ieee80211_flush_queues(local, sdata, false);
2892
2893         drv_mgd_complete_tx(sdata->local, sdata, &info);
2894
2895         /* clear AP addr only after building the needed mgmt frames */
2896         eth_zero_addr(sdata->deflink.u.mgd.bssid);
2897         eth_zero_addr(sdata->vif.cfg.ap_addr);
2898
2899         sdata->vif.cfg.ssid_len = 0;
2900
2901         /* remove AP and TDLS peers */
2902         sta_info_flush(sdata);
2903
2904         /* finally reset all BSS / config parameters */
2905         if (!sdata->vif.valid_links)
2906                 changed |= ieee80211_reset_erp_info(sdata);
2907
2908         ieee80211_led_assoc(local, 0);
2909         changed |= BSS_CHANGED_ASSOC;
2910         sdata->vif.cfg.assoc = false;
2911
2912         sdata->deflink.u.mgd.p2p_noa_index = -1;
2913         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2914                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2915
2916         /* on the next assoc, re-program HT/VHT parameters */
2917         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2918         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2919         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2920         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2921
2922         /*
2923          * reset MU-MIMO ownership and group data in default link,
2924          * if used, other links are destroyed
2925          */
2926         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2927                sizeof(sdata->vif.bss_conf.mu_group.membership));
2928         memset(sdata->vif.bss_conf.mu_group.position, 0,
2929                sizeof(sdata->vif.bss_conf.mu_group.position));
2930         if (!sdata->vif.valid_links)
2931                 changed |= BSS_CHANGED_MU_GROUPS;
2932         sdata->vif.bss_conf.mu_mimo_owner = false;
2933
2934         sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2935
2936         del_timer_sync(&local->dynamic_ps_timer);
2937         cancel_work_sync(&local->dynamic_ps_enable_work);
2938
2939         /* Disable ARP filtering */
2940         if (sdata->vif.cfg.arp_addr_cnt)
2941                 changed |= BSS_CHANGED_ARP_FILTER;
2942
2943         sdata->vif.bss_conf.qos = false;
2944         if (!sdata->vif.valid_links) {
2945                 changed |= BSS_CHANGED_QOS;
2946                 /* The BSSID (not really interesting) and HT changed */
2947                 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2948                 ieee80211_bss_info_change_notify(sdata, changed);
2949         } else {
2950                 ieee80211_vif_cfg_change_notify(sdata, changed);
2951         }
2952
2953         /* disassociated - set to defaults now */
2954         ieee80211_set_wmm_default(&sdata->deflink, false, false);
2955
2956         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2957         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2958         del_timer_sync(&sdata->u.mgd.timer);
2959         del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer);
2960
2961         sdata->vif.bss_conf.dtim_period = 0;
2962         sdata->vif.bss_conf.beacon_rate = NULL;
2963
2964         sdata->deflink.u.mgd.have_beacon = false;
2965         sdata->deflink.u.mgd.tracking_signal_avg = false;
2966         sdata->deflink.u.mgd.disable_wmm_tracking = false;
2967
2968         ifmgd->flags = 0;
2969         sdata->deflink.u.mgd.conn_flags = 0;
2970         mutex_lock(&local->mtx);
2971
2972         for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
2973                 struct ieee80211_link_data *link;
2974
2975                 link = sdata_dereference(sdata->link[link_id], sdata);
2976                 if (!link)
2977                         continue;
2978                 ieee80211_link_release_channel(link);
2979         }
2980
2981         sdata->vif.bss_conf.csa_active = false;
2982         sdata->deflink.u.mgd.csa_waiting_bcn = false;
2983         sdata->deflink.u.mgd.csa_ignored_same_chan = false;
2984         if (sdata->deflink.csa_block_tx) {
2985                 ieee80211_wake_vif_queues(local, sdata,
2986                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2987                 sdata->deflink.csa_block_tx = false;
2988         }
2989         mutex_unlock(&local->mtx);
2990
2991         /* existing TX TSPEC sessions no longer exist */
2992         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2993         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2994
2995         sdata->vif.bss_conf.pwr_reduction = 0;
2996         sdata->vif.bss_conf.tx_pwr_env_num = 0;
2997         memset(sdata->vif.bss_conf.tx_pwr_env, 0,
2998                sizeof(sdata->vif.bss_conf.tx_pwr_env));
2999
3000         ieee80211_vif_set_links(sdata, 0);
3001 }
3002
3003 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
3004 {
3005         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3006         struct ieee80211_local *local = sdata->local;
3007
3008         mutex_lock(&local->mtx);
3009         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
3010                 goto out;
3011
3012         __ieee80211_stop_poll(sdata);
3013
3014         mutex_lock(&local->iflist_mtx);
3015         ieee80211_recalc_ps(local);
3016         mutex_unlock(&local->iflist_mtx);
3017
3018         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3019                 goto out;
3020
3021         /*
3022          * We've received a probe response, but are not sure whether
3023          * we have or will be receiving any beacons or data, so let's
3024          * schedule the timers again, just in case.
3025          */
3026         ieee80211_sta_reset_beacon_monitor(sdata);
3027
3028         mod_timer(&ifmgd->conn_mon_timer,
3029                   round_jiffies_up(jiffies +
3030                                    IEEE80211_CONNECTION_IDLE_TIME));
3031 out:
3032         mutex_unlock(&local->mtx);
3033 }
3034
3035 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
3036                                            struct ieee80211_hdr *hdr,
3037                                            u16 tx_time)
3038 {
3039         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3040         u16 tid;
3041         int ac;
3042         struct ieee80211_sta_tx_tspec *tx_tspec;
3043         unsigned long now = jiffies;
3044
3045         if (!ieee80211_is_data_qos(hdr->frame_control))
3046                 return;
3047
3048         tid = ieee80211_get_tid(hdr);
3049         ac = ieee80211_ac_from_tid(tid);
3050         tx_tspec = &ifmgd->tx_tspec[ac];
3051
3052         if (likely(!tx_tspec->admitted_time))
3053                 return;
3054
3055         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3056                 tx_tspec->consumed_tx_time = 0;
3057                 tx_tspec->time_slice_start = now;
3058
3059                 if (tx_tspec->downgraded) {
3060                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3061                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3062                 }
3063         }
3064
3065         if (tx_tspec->downgraded)
3066                 return;
3067
3068         tx_tspec->consumed_tx_time += tx_time;
3069
3070         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
3071                 tx_tspec->downgraded = true;
3072                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
3073                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3074         }
3075 }
3076
3077 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
3078                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
3079 {
3080         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
3081
3082         if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
3083             !sdata->u.mgd.probe_send_count)
3084                 return;
3085
3086         if (ack)
3087                 sdata->u.mgd.probe_send_count = 0;
3088         else
3089                 sdata->u.mgd.nullfunc_failed = true;
3090         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3091 }
3092
3093 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
3094                                           const u8 *src, const u8 *dst,
3095                                           const u8 *ssid, size_t ssid_len,
3096                                           struct ieee80211_channel *channel)
3097 {
3098         struct sk_buff *skb;
3099
3100         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
3101                                         ssid, ssid_len, NULL, 0,
3102                                         IEEE80211_PROBE_FLAG_DIRECTED);
3103         if (skb)
3104                 ieee80211_tx_skb(sdata, skb);
3105 }
3106
3107 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
3108 {
3109         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3110         u8 *dst = sdata->vif.cfg.ap_addr;
3111         u8 unicast_limit = max(1, max_probe_tries - 3);
3112         struct sta_info *sta;
3113
3114         if (WARN_ON(sdata->vif.valid_links))
3115                 return;
3116
3117         /*
3118          * Try sending broadcast probe requests for the last three
3119          * probe requests after the first ones failed since some
3120          * buggy APs only support broadcast probe requests.
3121          */
3122         if (ifmgd->probe_send_count >= unicast_limit)
3123                 dst = NULL;
3124
3125         /*
3126          * When the hardware reports an accurate Tx ACK status, it's
3127          * better to send a nullfunc frame instead of a probe request,
3128          * as it will kick us off the AP quickly if we aren't associated
3129          * anymore. The timeout will be reset if the frame is ACKed by
3130          * the AP.
3131          */
3132         ifmgd->probe_send_count++;
3133
3134         if (dst) {
3135                 mutex_lock(&sdata->local->sta_mtx);
3136                 sta = sta_info_get(sdata, dst);
3137                 if (!WARN_ON(!sta))
3138                         ieee80211_check_fast_rx(sta);
3139                 mutex_unlock(&sdata->local->sta_mtx);
3140         }
3141
3142         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
3143                 ifmgd->nullfunc_failed = false;
3144                 ieee80211_send_nullfunc(sdata->local, sdata, false);
3145         } else {
3146                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
3147                                               sdata->vif.cfg.ssid,
3148                                               sdata->vif.cfg.ssid_len,
3149                                               sdata->deflink.u.mgd.bss->channel);
3150         }
3151
3152         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
3153         run_again(sdata, ifmgd->probe_timeout);
3154 }
3155
3156 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
3157                                    bool beacon)
3158 {
3159         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3160         bool already = false;
3161
3162         if (WARN_ON(sdata->vif.valid_links))
3163                 return;
3164
3165         if (!ieee80211_sdata_running(sdata))
3166                 return;
3167
3168         sdata_lock(sdata);
3169
3170         if (!ifmgd->associated)
3171                 goto out;
3172
3173         mutex_lock(&sdata->local->mtx);
3174
3175         if (sdata->local->tmp_channel || sdata->local->scanning) {
3176                 mutex_unlock(&sdata->local->mtx);
3177                 goto out;
3178         }
3179
3180         if (sdata->local->suspending) {
3181                 /* reschedule after resume */
3182                 mutex_unlock(&sdata->local->mtx);
3183                 ieee80211_reset_ap_probe(sdata);
3184                 goto out;
3185         }
3186
3187         if (beacon) {
3188                 mlme_dbg_ratelimited(sdata,
3189                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
3190                                      beacon_loss_count);
3191
3192                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
3193         }
3194
3195         /*
3196          * The driver/our work has already reported this event or the
3197          * connection monitoring has kicked in and we have already sent
3198          * a probe request. Or maybe the AP died and the driver keeps
3199          * reporting until we disassociate...
3200          *
3201          * In either case we have to ignore the current call to this
3202          * function (except for setting the correct probe reason bit)
3203          * because otherwise we would reset the timer every time and
3204          * never check whether we received a probe response!
3205          */
3206         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
3207                 already = true;
3208
3209         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
3210
3211         mutex_unlock(&sdata->local->mtx);
3212
3213         if (already)
3214                 goto out;
3215
3216         mutex_lock(&sdata->local->iflist_mtx);
3217         ieee80211_recalc_ps(sdata->local);
3218         mutex_unlock(&sdata->local->iflist_mtx);
3219
3220         ifmgd->probe_send_count = 0;
3221         ieee80211_mgd_probe_ap_send(sdata);
3222  out:
3223         sdata_unlock(sdata);
3224 }
3225
3226 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
3227                                           struct ieee80211_vif *vif)
3228 {
3229         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3230         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3231         struct cfg80211_bss *cbss;
3232         struct sk_buff *skb;
3233         const struct element *ssid;
3234         int ssid_len;
3235
3236         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
3237                     sdata->vif.valid_links))
3238                 return NULL;
3239
3240         sdata_assert_lock(sdata);
3241
3242         if (ifmgd->associated)
3243                 cbss = sdata->deflink.u.mgd.bss;
3244         else if (ifmgd->auth_data)
3245                 cbss = ifmgd->auth_data->bss;
3246         else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss)
3247                 cbss = ifmgd->assoc_data->link[0].bss;
3248         else
3249                 return NULL;
3250
3251         rcu_read_lock();
3252         ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
3253         if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
3254                       "invalid SSID element (len=%d)",
3255                       ssid ? ssid->datalen : -1))
3256                 ssid_len = 0;
3257         else
3258                 ssid_len = ssid->datalen;
3259
3260         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
3261                                         (u32) -1, cbss->channel,
3262                                         ssid->data, ssid_len,
3263                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
3264         rcu_read_unlock();
3265
3266         return skb;
3267 }
3268 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
3269
3270 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
3271                                         const u8 *buf, size_t len, bool tx,
3272                                         u16 reason, bool reconnect)
3273 {
3274         struct ieee80211_event event = {
3275                 .type = MLME_EVENT,
3276                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
3277                 .u.mlme.reason = reason,
3278         };
3279
3280         if (tx)
3281                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
3282         else
3283                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
3284
3285         drv_event_callback(sdata->local, sdata, &event);
3286 }
3287
3288 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
3289 {
3290         struct ieee80211_local *local = sdata->local;
3291         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3292         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3293         bool tx;
3294
3295         sdata_lock(sdata);
3296         if (!ifmgd->associated) {
3297                 sdata_unlock(sdata);
3298                 return;
3299         }
3300
3301         /* in MLO assume we have a link where we can TX the frame */
3302         tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx;
3303
3304         if (!ifmgd->driver_disconnect) {
3305                 unsigned int link_id;
3306
3307                 /*
3308                  * AP is probably out of range (or not reachable for another
3309                  * reason) so remove the bss structs for that AP. In the case
3310                  * of multi-link, it's not clear that all of them really are
3311                  * out of range, but if they weren't the driver likely would
3312                  * have switched to just have a single link active?
3313                  */
3314                 for (link_id = 0;
3315                      link_id < ARRAY_SIZE(sdata->link);
3316                      link_id++) {
3317                         struct ieee80211_link_data *link;
3318
3319                         link = sdata_dereference(sdata->link[link_id], sdata);
3320                         if (!link)
3321                                 continue;
3322                         cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss);
3323                         link->u.mgd.bss = NULL;
3324                 }
3325         }
3326
3327         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3328                                ifmgd->driver_disconnect ?
3329                                         WLAN_REASON_DEAUTH_LEAVING :
3330                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3331                                tx, frame_buf);
3332         mutex_lock(&local->mtx);
3333         /* the other links will be destroyed */
3334         sdata->vif.bss_conf.csa_active = false;
3335         sdata->deflink.u.mgd.csa_waiting_bcn = false;
3336         if (sdata->deflink.csa_block_tx) {
3337                 ieee80211_wake_vif_queues(local, sdata,
3338                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3339                 sdata->deflink.csa_block_tx = false;
3340         }
3341         mutex_unlock(&local->mtx);
3342
3343         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
3344                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3345                                     ifmgd->reconnect);
3346         ifmgd->reconnect = false;
3347
3348         sdata_unlock(sdata);
3349 }
3350
3351 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
3352 {
3353         struct ieee80211_sub_if_data *sdata =
3354                 container_of(work, struct ieee80211_sub_if_data,
3355                              u.mgd.beacon_connection_loss_work);
3356         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3357
3358         if (ifmgd->connection_loss) {
3359                 sdata_info(sdata, "Connection to AP %pM lost\n",
3360                            sdata->vif.cfg.ap_addr);
3361                 __ieee80211_disconnect(sdata);
3362                 ifmgd->connection_loss = false;
3363         } else if (ifmgd->driver_disconnect) {
3364                 sdata_info(sdata,
3365                            "Driver requested disconnection from AP %pM\n",
3366                            sdata->vif.cfg.ap_addr);
3367                 __ieee80211_disconnect(sdata);
3368                 ifmgd->driver_disconnect = false;
3369         } else {
3370                 if (ifmgd->associated)
3371                         sdata->deflink.u.mgd.beacon_loss_count++;
3372                 ieee80211_mgd_probe_ap(sdata, true);
3373         }
3374 }
3375
3376 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
3377 {
3378         struct ieee80211_sub_if_data *sdata =
3379                 container_of(work, struct ieee80211_sub_if_data,
3380                              u.mgd.csa_connection_drop_work);
3381
3382         __ieee80211_disconnect(sdata);
3383 }
3384
3385 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
3386 {
3387         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3388         struct ieee80211_hw *hw = &sdata->local->hw;
3389
3390         trace_api_beacon_loss(sdata);
3391
3392         sdata->u.mgd.connection_loss = false;
3393         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3394 }
3395 EXPORT_SYMBOL(ieee80211_beacon_loss);
3396
3397 void ieee80211_connection_loss(struct ieee80211_vif *vif)
3398 {
3399         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3400         struct ieee80211_hw *hw = &sdata->local->hw;
3401
3402         trace_api_connection_loss(sdata);
3403
3404         sdata->u.mgd.connection_loss = true;
3405         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3406 }
3407 EXPORT_SYMBOL(ieee80211_connection_loss);
3408
3409 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
3410 {
3411         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3412         struct ieee80211_hw *hw = &sdata->local->hw;
3413
3414         trace_api_disconnect(sdata, reconnect);
3415
3416         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
3417                 return;
3418
3419         sdata->u.mgd.driver_disconnect = true;
3420         sdata->u.mgd.reconnect = reconnect;
3421         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3422 }
3423 EXPORT_SYMBOL(ieee80211_disconnect);
3424
3425 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
3426                                         bool assoc)
3427 {
3428         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3429
3430         sdata_assert_lock(sdata);
3431
3432         if (!assoc) {
3433                 /*
3434                  * we are not authenticated yet, the only timer that could be
3435                  * running is the timeout for the authentication response which
3436                  * which is not relevant anymore.
3437                  */
3438                 del_timer_sync(&sdata->u.mgd.timer);
3439                 sta_info_destroy_addr(sdata, auth_data->ap_addr);
3440
3441                 /* other links are destroyed */
3442                 sdata->deflink.u.mgd.conn_flags = 0;
3443                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3444                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3445                                                   BSS_CHANGED_BSSID);
3446                 sdata->u.mgd.flags = 0;
3447
3448                 mutex_lock(&sdata->local->mtx);
3449                 ieee80211_link_release_channel(&sdata->deflink);
3450                 ieee80211_vif_set_links(sdata, 0);
3451                 mutex_unlock(&sdata->local->mtx);
3452         }
3453
3454         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
3455         kfree(auth_data);
3456         sdata->u.mgd.auth_data = NULL;
3457 }
3458
3459 enum assoc_status {
3460         ASSOC_SUCCESS,
3461         ASSOC_REJECTED,
3462         ASSOC_TIMEOUT,
3463         ASSOC_ABANDON,
3464 };
3465
3466 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
3467                                          enum assoc_status status)
3468 {
3469         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3470
3471         sdata_assert_lock(sdata);
3472
3473         if (status != ASSOC_SUCCESS) {
3474                 /*
3475                  * we are not associated yet, the only timer that could be
3476                  * running is the timeout for the association response which
3477                  * which is not relevant anymore.
3478                  */
3479                 del_timer_sync(&sdata->u.mgd.timer);
3480                 sta_info_destroy_addr(sdata, assoc_data->ap_addr);
3481
3482                 sdata->deflink.u.mgd.conn_flags = 0;
3483                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3484                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3485                                                   BSS_CHANGED_BSSID);
3486                 sdata->u.mgd.flags = 0;
3487                 sdata->vif.bss_conf.mu_mimo_owner = false;
3488
3489                 if (status != ASSOC_REJECTED) {
3490                         struct cfg80211_assoc_failure data = {
3491                                 .timeout = status == ASSOC_TIMEOUT,
3492                         };
3493                         int i;
3494
3495                         BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
3496                                      ARRAY_SIZE(assoc_data->link));
3497
3498                         for (i = 0; i < ARRAY_SIZE(data.bss); i++)
3499                                 data.bss[i] = assoc_data->link[i].bss;
3500
3501                         if (sdata->vif.valid_links)
3502                                 data.ap_mld_addr = assoc_data->ap_addr;
3503
3504                         cfg80211_assoc_failure(sdata->dev, &data);
3505                 }
3506
3507                 mutex_lock(&sdata->local->mtx);
3508                 ieee80211_link_release_channel(&sdata->deflink);
3509                 ieee80211_vif_set_links(sdata, 0);
3510                 mutex_unlock(&sdata->local->mtx);
3511         }
3512
3513         kfree(assoc_data);
3514         sdata->u.mgd.assoc_data = NULL;
3515 }
3516
3517 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
3518                                      struct ieee80211_mgmt *mgmt, size_t len)
3519 {
3520         struct ieee80211_local *local = sdata->local;
3521         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3522         const struct element *challenge;
3523         u8 *pos;
3524         u32 tx_flags = 0;
3525         struct ieee80211_prep_tx_info info = {
3526                 .subtype = IEEE80211_STYPE_AUTH,
3527         };
3528
3529         pos = mgmt->u.auth.variable;
3530         challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
3531                                        len - (pos - (u8 *)mgmt));
3532         if (!challenge)
3533                 return;
3534         auth_data->expected_transaction = 4;
3535         drv_mgd_prepare_tx(sdata->local, sdata, &info);
3536         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3537                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3538                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3539         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
3540                             (void *)challenge,
3541                             challenge->datalen + sizeof(*challenge),
3542                             auth_data->ap_addr, auth_data->ap_addr,
3543                             auth_data->key, auth_data->key_len,
3544                             auth_data->key_idx, tx_flags);
3545 }
3546
3547 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
3548 {
3549         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3550         const u8 *ap_addr = ifmgd->auth_data->ap_addr;
3551         struct sta_info *sta;
3552         bool result = true;
3553
3554         sdata_info(sdata, "authenticated\n");
3555         ifmgd->auth_data->done = true;
3556         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
3557         ifmgd->auth_data->timeout_started = true;
3558         run_again(sdata, ifmgd->auth_data->timeout);
3559
3560         /* move station state to auth */
3561         mutex_lock(&sdata->local->sta_mtx);
3562         sta = sta_info_get(sdata, ap_addr);
3563         if (!sta) {
3564                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
3565                 result = false;
3566                 goto out;
3567         }
3568         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
3569                 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
3570                 result = false;
3571                 goto out;
3572         }
3573
3574 out:
3575         mutex_unlock(&sdata->local->sta_mtx);
3576         return result;
3577 }
3578
3579 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3580                                    struct ieee80211_mgmt *mgmt, size_t len)
3581 {
3582         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3583         u16 auth_alg, auth_transaction, status_code;
3584         struct ieee80211_event event = {
3585                 .type = MLME_EVENT,
3586                 .u.mlme.data = AUTH_EVENT,
3587         };
3588         struct ieee80211_prep_tx_info info = {
3589                 .subtype = IEEE80211_STYPE_AUTH,
3590         };
3591
3592         sdata_assert_lock(sdata);
3593
3594         if (len < 24 + 6)
3595                 return;
3596
3597         if (!ifmgd->auth_data || ifmgd->auth_data->done)
3598                 return;
3599
3600         if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid))
3601                 return;
3602
3603         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3604         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3605         status_code = le16_to_cpu(mgmt->u.auth.status_code);
3606
3607         if (auth_alg != ifmgd->auth_data->algorithm ||
3608             (auth_alg != WLAN_AUTH_SAE &&
3609              auth_transaction != ifmgd->auth_data->expected_transaction) ||
3610             (auth_alg == WLAN_AUTH_SAE &&
3611              (auth_transaction < ifmgd->auth_data->expected_transaction ||
3612               auth_transaction > 2))) {
3613                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3614                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3615                            auth_transaction,
3616                            ifmgd->auth_data->expected_transaction);
3617                 goto notify_driver;
3618         }
3619
3620         if (status_code != WLAN_STATUS_SUCCESS) {
3621                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3622
3623                 if (auth_alg == WLAN_AUTH_SAE &&
3624                     (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3625                      (auth_transaction == 1 &&
3626                       (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3627                        status_code == WLAN_STATUS_SAE_PK)))) {
3628                         /* waiting for userspace now */
3629                         ifmgd->auth_data->waiting = true;
3630                         ifmgd->auth_data->timeout =
3631                                 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
3632                         ifmgd->auth_data->timeout_started = true;
3633                         run_again(sdata, ifmgd->auth_data->timeout);
3634                         goto notify_driver;
3635                 }
3636
3637                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
3638                            mgmt->sa, status_code);
3639                 ieee80211_destroy_auth_data(sdata, false);
3640                 event.u.mlme.status = MLME_DENIED;
3641                 event.u.mlme.reason = status_code;
3642                 drv_event_callback(sdata->local, sdata, &event);
3643                 goto notify_driver;
3644         }
3645
3646         switch (ifmgd->auth_data->algorithm) {
3647         case WLAN_AUTH_OPEN:
3648         case WLAN_AUTH_LEAP:
3649         case WLAN_AUTH_FT:
3650         case WLAN_AUTH_SAE:
3651         case WLAN_AUTH_FILS_SK:
3652         case WLAN_AUTH_FILS_SK_PFS:
3653         case WLAN_AUTH_FILS_PK:
3654                 break;
3655         case WLAN_AUTH_SHARED_KEY:
3656                 if (ifmgd->auth_data->expected_transaction != 4) {
3657                         ieee80211_auth_challenge(sdata, mgmt, len);
3658                         /* need another frame */
3659                         return;
3660                 }
3661                 break;
3662         default:
3663                 WARN_ONCE(1, "invalid auth alg %d",
3664                           ifmgd->auth_data->algorithm);
3665                 goto notify_driver;
3666         }
3667
3668         event.u.mlme.status = MLME_SUCCESS;
3669         info.success = 1;
3670         drv_event_callback(sdata->local, sdata, &event);
3671         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3672             (auth_transaction == 2 &&
3673              ifmgd->auth_data->expected_transaction == 2)) {
3674                 if (!ieee80211_mark_sta_auth(sdata))
3675                         return; /* ignore frame -- wait for timeout */
3676         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3677                    auth_transaction == 2) {
3678                 sdata_info(sdata, "SAE peer confirmed\n");
3679                 ifmgd->auth_data->peer_confirmed = true;
3680         }
3681
3682         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3683 notify_driver:
3684         drv_mgd_complete_tx(sdata->local, sdata, &info);
3685 }
3686
3687 #define case_WLAN(type) \
3688         case WLAN_REASON_##type: return #type
3689
3690 const char *ieee80211_get_reason_code_string(u16 reason_code)
3691 {
3692         switch (reason_code) {
3693         case_WLAN(UNSPECIFIED);
3694         case_WLAN(PREV_AUTH_NOT_VALID);
3695         case_WLAN(DEAUTH_LEAVING);
3696         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3697         case_WLAN(DISASSOC_AP_BUSY);
3698         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3699         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3700         case_WLAN(DISASSOC_STA_HAS_LEFT);
3701         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3702         case_WLAN(DISASSOC_BAD_POWER);
3703         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3704         case_WLAN(INVALID_IE);
3705         case_WLAN(MIC_FAILURE);
3706         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3707         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3708         case_WLAN(IE_DIFFERENT);
3709         case_WLAN(INVALID_GROUP_CIPHER);
3710         case_WLAN(INVALID_PAIRWISE_CIPHER);
3711         case_WLAN(INVALID_AKMP);
3712         case_WLAN(UNSUPP_RSN_VERSION);
3713         case_WLAN(INVALID_RSN_IE_CAP);
3714         case_WLAN(IEEE8021X_FAILED);
3715         case_WLAN(CIPHER_SUITE_REJECTED);
3716         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3717         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3718         case_WLAN(DISASSOC_LOW_ACK);
3719         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3720         case_WLAN(QSTA_LEAVE_QBSS);
3721         case_WLAN(QSTA_NOT_USE);
3722         case_WLAN(QSTA_REQUIRE_SETUP);
3723         case_WLAN(QSTA_TIMEOUT);
3724         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3725         case_WLAN(MESH_PEER_CANCELED);
3726         case_WLAN(MESH_MAX_PEERS);
3727         case_WLAN(MESH_CONFIG);
3728         case_WLAN(MESH_CLOSE);
3729         case_WLAN(MESH_MAX_RETRIES);
3730         case_WLAN(MESH_CONFIRM_TIMEOUT);
3731         case_WLAN(MESH_INVALID_GTK);
3732         case_WLAN(MESH_INCONSISTENT_PARAM);
3733         case_WLAN(MESH_INVALID_SECURITY);
3734         case_WLAN(MESH_PATH_ERROR);
3735         case_WLAN(MESH_PATH_NOFORWARD);
3736         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3737         case_WLAN(MAC_EXISTS_IN_MBSS);
3738         case_WLAN(MESH_CHAN_REGULATORY);
3739         case_WLAN(MESH_CHAN);
3740         default: return "<unknown>";
3741         }
3742 }
3743
3744 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3745                                      struct ieee80211_mgmt *mgmt, size_t len)
3746 {
3747         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3748         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3749
3750         sdata_assert_lock(sdata);
3751
3752         if (len < 24 + 2)
3753                 return;
3754
3755         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3756                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3757                 return;
3758         }
3759
3760         if (ifmgd->associated &&
3761             ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) {
3762                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3763                            sdata->vif.cfg.ap_addr, reason_code,
3764                            ieee80211_get_reason_code_string(reason_code));
3765
3766                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3767
3768                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3769                                             reason_code, false);
3770                 return;
3771         }
3772
3773         if (ifmgd->assoc_data &&
3774             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) {
3775                 sdata_info(sdata,
3776                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3777                            ifmgd->assoc_data->ap_addr, reason_code,
3778                            ieee80211_get_reason_code_string(reason_code));
3779
3780                 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
3781
3782                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3783                 return;
3784         }
3785 }
3786
3787
3788 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3789                                        struct ieee80211_mgmt *mgmt, size_t len)
3790 {
3791         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3792         u16 reason_code;
3793
3794         sdata_assert_lock(sdata);
3795
3796         if (len < 24 + 2)
3797                 return;
3798
3799         if (!ifmgd->associated ||
3800             !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
3801                 return;
3802
3803         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3804
3805         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3806                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3807                 return;
3808         }
3809
3810         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3811                    sdata->vif.cfg.ap_addr, reason_code,
3812                    ieee80211_get_reason_code_string(reason_code));
3813
3814         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3815
3816         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3817                                     false);
3818 }
3819
3820 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3821                                 u8 *supp_rates, unsigned int supp_rates_len,
3822                                 u32 *rates, u32 *basic_rates,
3823                                 bool *have_higher_than_11mbit,
3824                                 int *min_rate, int *min_rate_index,
3825                                 int shift)
3826 {
3827         int i, j;
3828
3829         for (i = 0; i < supp_rates_len; i++) {
3830                 int rate = supp_rates[i] & 0x7f;
3831                 bool is_basic = !!(supp_rates[i] & 0x80);
3832
3833                 if ((rate * 5 * (1 << shift)) > 110)
3834                         *have_higher_than_11mbit = true;
3835
3836                 /*
3837                  * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
3838                  * since they're not rates.
3839                  *
3840                  * Note: Even though the membership selector and the basic
3841                  *       rate flag share the same bit, they are not exactly
3842                  *       the same.
3843                  */
3844                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3845                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3846                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3847                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3848                         continue;
3849
3850                 for (j = 0; j < sband->n_bitrates; j++) {
3851                         struct ieee80211_rate *br;
3852                         int brate;
3853
3854                         br = &sband->bitrates[j];
3855
3856                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3857                         if (brate == rate) {
3858                                 *rates |= BIT(j);
3859                                 if (is_basic)
3860                                         *basic_rates |= BIT(j);
3861                                 if ((rate * 5) < *min_rate) {
3862                                         *min_rate = rate * 5;
3863                                         *min_rate_index = j;
3864                                 }
3865                                 break;
3866                         }
3867                 }
3868         }
3869 }
3870
3871 static bool ieee80211_twt_req_supported(const struct link_sta_info *link_sta,
3872                                         const struct ieee802_11_elems *elems)
3873 {
3874         if (elems->ext_capab_len < 10)
3875                 return false;
3876
3877         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3878                 return false;
3879
3880         return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] &
3881                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3882 }
3883
3884 static int ieee80211_recalc_twt_req(struct ieee80211_link_data *link,
3885                                     struct link_sta_info *link_sta,
3886                                     struct ieee802_11_elems *elems)
3887 {
3888         bool twt = ieee80211_twt_req_supported(link_sta, elems);
3889
3890         if (link->conf->twt_requester != twt) {
3891                 link->conf->twt_requester = twt;
3892                 return BSS_CHANGED_TWT;
3893         }
3894         return 0;
3895 }
3896
3897 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
3898                                         struct ieee80211_bss_conf *bss_conf,
3899                                         struct ieee80211_supported_band *sband,
3900                                         struct link_sta_info *link_sta)
3901 {
3902         const struct ieee80211_sta_he_cap *own_he_cap =
3903                 ieee80211_get_he_iftype_cap(sband,
3904                                             ieee80211_vif_type_p2p(&sdata->vif));
3905
3906         return bss_conf->he_support &&
3907                 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] &
3908                         IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
3909                 own_he_cap &&
3910                 (own_he_cap->he_cap_elem.mac_cap_info[2] &
3911                         IEEE80211_HE_MAC_CAP2_BCAST_TWT);
3912 }
3913
3914 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
3915                                         struct link_sta_info *link_sta,
3916                                         struct cfg80211_bss *cbss,
3917                                         struct ieee80211_mgmt *mgmt,
3918                                         const u8 *elem_start,
3919                                         unsigned int elem_len,
3920                                         u64 *changed)
3921 {
3922         struct ieee80211_sub_if_data *sdata = link->sdata;
3923         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3924         struct ieee80211_bss_conf *bss_conf = link->conf;
3925         struct ieee80211_local *local = sdata->local;
3926         struct ieee80211_elems_parse_params parse_params = {
3927                 .start = elem_start,
3928                 .len = elem_len,
3929                 .bss = cbss,
3930                 .link_id = link == &sdata->deflink ? -1 : link->link_id,
3931                 .from_ap = true,
3932         };
3933         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3934         bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
3935         const struct cfg80211_bss_ies *bss_ies = NULL;
3936         struct ieee80211_supported_band *sband;
3937         struct ieee802_11_elems *elems;
3938         u16 capab_info;
3939         bool ret;
3940
3941         elems = ieee802_11_parse_elems_full(&parse_params);
3942         if (!elems)
3943                 return false;
3944
3945         /* FIXME: use from STA profile element after parsing that */
3946         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3947
3948         if (!is_s1g && !elems->supp_rates) {
3949                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3950                 ret = false;
3951                 goto out;
3952         }
3953
3954         link->u.mgd.tdls_chan_switch_prohibited =
3955                 elems->ext_capab && elems->ext_capab_len >= 5 &&
3956                 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3957
3958         /*
3959          * Some APs are erroneously not including some information in their
3960          * (re)association response frames. Try to recover by using the data
3961          * from the beacon or probe response. This seems to afflict mobile
3962          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3963          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3964          */
3965         if (!is_6ghz &&
3966             ((assoc_data->wmm && !elems->wmm_param) ||
3967              (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
3968               (!elems->ht_cap_elem || !elems->ht_operation)) ||
3969              (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
3970               (!elems->vht_cap_elem || !elems->vht_operation)))) {
3971                 const struct cfg80211_bss_ies *ies;
3972                 struct ieee802_11_elems *bss_elems;
3973
3974                 rcu_read_lock();
3975                 ies = rcu_dereference(cbss->ies);
3976                 if (ies)
3977                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3978                                           GFP_ATOMIC);
3979                 rcu_read_unlock();
3980                 if (!bss_ies) {
3981                         ret = false;
3982                         goto out;
3983                 }
3984
3985                 parse_params.start = bss_ies->data;
3986                 parse_params.len = bss_ies->len;
3987                 bss_elems = ieee802_11_parse_elems_full(&parse_params);
3988                 if (!bss_elems) {
3989                         ret = false;
3990                         goto out;
3991                 }
3992
3993                 if (assoc_data->wmm &&
3994                     !elems->wmm_param && bss_elems->wmm_param) {
3995                         elems->wmm_param = bss_elems->wmm_param;
3996                         sdata_info(sdata,
3997                                    "AP bug: WMM param missing from AssocResp\n");
3998                 }
3999
4000                 /*
4001                  * Also check if we requested HT/VHT, otherwise the AP doesn't
4002                  * have to include the IEs in the (re)association response.
4003                  */
4004                 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
4005                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4006                         elems->ht_cap_elem = bss_elems->ht_cap_elem;
4007                         sdata_info(sdata,
4008                                    "AP bug: HT capability missing from AssocResp\n");
4009                 }
4010                 if (!elems->ht_operation && bss_elems->ht_operation &&
4011                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4012                         elems->ht_operation = bss_elems->ht_operation;
4013                         sdata_info(sdata,
4014                                    "AP bug: HT operation missing from AssocResp\n");
4015                 }
4016                 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
4017                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4018                         elems->vht_cap_elem = bss_elems->vht_cap_elem;
4019                         sdata_info(sdata,
4020                                    "AP bug: VHT capa missing from AssocResp\n");
4021                 }
4022                 if (!elems->vht_operation && bss_elems->vht_operation &&
4023                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4024                         elems->vht_operation = bss_elems->vht_operation;
4025                         sdata_info(sdata,
4026                                    "AP bug: VHT operation missing from AssocResp\n");
4027                 }
4028
4029                 kfree(bss_elems);
4030         }
4031
4032         /*
4033          * We previously checked these in the beacon/probe response, so
4034          * they should be present here. This is just a safety net.
4035          */
4036         if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
4037             (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
4038                 sdata_info(sdata,
4039                            "HT AP is missing WMM params or HT capability/operation\n");
4040                 ret = false;
4041                 goto out;
4042         }
4043
4044         if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
4045             (!elems->vht_cap_elem || !elems->vht_operation)) {
4046                 sdata_info(sdata,
4047                            "VHT AP is missing VHT capability/operation\n");
4048                 ret = false;
4049                 goto out;
4050         }
4051
4052         if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4053             !elems->he_6ghz_capa) {
4054                 sdata_info(sdata,
4055                            "HE 6 GHz AP is missing HE 6 GHz band capability\n");
4056                 ret = false;
4057                 goto out;
4058         }
4059
4060         if (WARN_ON(!link->conf->chandef.chan)) {
4061                 ret = false;
4062                 goto out;
4063         }
4064         sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
4065
4066         if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4067             (!elems->he_cap || !elems->he_operation)) {
4068                 sdata_info(sdata,
4069                            "HE AP is missing HE capability/operation\n");
4070                 ret = false;
4071                 goto out;
4072         }
4073
4074         /* Set up internal HT/VHT capabilities */
4075         if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT))
4076                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
4077                                                   elems->ht_cap_elem,
4078                                                   link_sta);
4079
4080         if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT))
4081                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4082                                                     elems->vht_cap_elem,
4083                                                     link_sta);
4084
4085         if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4086             elems->he_cap) {
4087                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
4088                                                   elems->he_cap,
4089                                                   elems->he_cap_len,
4090                                                   elems->he_6ghz_capa,
4091                                                   link_sta);
4092
4093                 bss_conf->he_support = link_sta->pub->he_cap.has_he;
4094                 if (elems->rsnx && elems->rsnx_len &&
4095                     (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
4096                     wiphy_ext_feature_isset(local->hw.wiphy,
4097                                             NL80211_EXT_FEATURE_PROTECTED_TWT))
4098                         bss_conf->twt_protected = true;
4099                 else
4100                         bss_conf->twt_protected = false;
4101
4102                 *changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
4103
4104                 if (elems->eht_operation && elems->eht_cap &&
4105                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
4106                         ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
4107                                                             elems->he_cap,
4108                                                             elems->he_cap_len,
4109                                                             elems->eht_cap,
4110                                                             elems->eht_cap_len,
4111                                                             link_sta);
4112
4113                         bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
4114                 } else {
4115                         bss_conf->eht_support = false;
4116                 }
4117         } else {
4118                 bss_conf->he_support = false;
4119                 bss_conf->twt_requester = false;
4120                 bss_conf->twt_protected = false;
4121                 bss_conf->eht_support = false;
4122         }
4123
4124         bss_conf->twt_broadcast =
4125                 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
4126
4127         if (bss_conf->he_support) {
4128                 bss_conf->he_bss_color.color =
4129                         le32_get_bits(elems->he_operation->he_oper_params,
4130                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
4131                 bss_conf->he_bss_color.partial =
4132                         le32_get_bits(elems->he_operation->he_oper_params,
4133                                       IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
4134                 bss_conf->he_bss_color.enabled =
4135                         !le32_get_bits(elems->he_operation->he_oper_params,
4136                                        IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
4137
4138                 if (bss_conf->he_bss_color.enabled)
4139                         *changed |= BSS_CHANGED_HE_BSS_COLOR;
4140
4141                 bss_conf->htc_trig_based_pkt_ext =
4142                         le32_get_bits(elems->he_operation->he_oper_params,
4143                                       IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
4144                 bss_conf->frame_time_rts_th =
4145                         le32_get_bits(elems->he_operation->he_oper_params,
4146                                       IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
4147
4148                 bss_conf->uora_exists = !!elems->uora_element;
4149                 if (elems->uora_element)
4150                         bss_conf->uora_ocw_range = elems->uora_element[0];
4151
4152                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
4153                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
4154                 /* TODO: OPEN: what happens if BSS color disable is set? */
4155         }
4156
4157         if (cbss->transmitted_bss) {
4158                 bss_conf->nontransmitted = true;
4159                 ether_addr_copy(bss_conf->transmitter_bssid,
4160                                 cbss->transmitted_bss->bssid);
4161                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
4162                 bss_conf->bssid_index = cbss->bssid_index;
4163         }
4164
4165         /*
4166          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
4167          * in their association response, so ignore that data for our own
4168          * configuration. If it changed since the last beacon, we'll get the
4169          * next beacon and update then.
4170          */
4171
4172         /*
4173          * If an operating mode notification IE is present, override the
4174          * NSS calculation (that would be done in rate_control_rate_init())
4175          * and use the # of streams from that element.
4176          */
4177         if (elems->opmode_notif &&
4178             !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
4179                 u8 nss;
4180
4181                 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
4182                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
4183                 nss += 1;
4184                 link_sta->pub->rx_nss = nss;
4185         }
4186
4187         /*
4188          * Always handle WMM once after association regardless
4189          * of the first value the AP uses. Setting -1 here has
4190          * that effect because the AP values is an unsigned
4191          * 4-bit value.
4192          */
4193         link->u.mgd.wmm_last_param_set = -1;
4194         link->u.mgd.mu_edca_last_param_set = -1;
4195
4196         if (link->u.mgd.disable_wmm_tracking) {
4197                 ieee80211_set_wmm_default(link, false, false);
4198         } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param,
4199                                              elems->wmm_param_len,
4200                                              elems->mu_edca_param_set)) {
4201                 /* still enable QoS since we might have HT/VHT */
4202                 ieee80211_set_wmm_default(link, false, true);
4203                 /* disable WMM tracking in this case to disable
4204                  * tracking WMM parameter changes in the beacon if
4205                  * the parameters weren't actually valid. Doing so
4206                  * avoids changing parameters very strangely when
4207                  * the AP is going back and forth between valid and
4208                  * invalid parameters.
4209                  */
4210                 link->u.mgd.disable_wmm_tracking = true;
4211         }
4212
4213         if (elems->max_idle_period_ie) {
4214                 bss_conf->max_idle_period =
4215                         le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
4216                 bss_conf->protected_keep_alive =
4217                         !!(elems->max_idle_period_ie->idle_options &
4218                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
4219                 *changed |= BSS_CHANGED_KEEP_ALIVE;
4220         } else {
4221                 bss_conf->max_idle_period = 0;
4222                 bss_conf->protected_keep_alive = false;
4223         }
4224
4225         /* set assoc capability (AID was already set earlier),
4226          * ieee80211_set_associated() will tell the driver */
4227         bss_conf->assoc_capability = capab_info;
4228
4229         ret = true;
4230 out:
4231         kfree(elems);
4232         kfree(bss_ies);
4233         return ret;
4234 }
4235
4236 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
4237                                         struct sta_info *sta,
4238                                         struct link_sta_info *link_sta,
4239                                         struct cfg80211_bss *cbss)
4240 {
4241         struct ieee80211_sub_if_data *sdata = link->sdata;
4242         struct ieee80211_local *local = sdata->local;
4243         struct ieee80211_bss *bss = (void *)cbss->priv;
4244         u32 rates = 0, basic_rates = 0;
4245         bool have_higher_than_11mbit = false;
4246         int min_rate = INT_MAX, min_rate_index = -1;
4247         /* this is clearly wrong for MLO but we'll just remove it later */
4248         int shift = ieee80211_vif_get_shift(&sdata->vif);
4249         struct ieee80211_supported_band *sband;
4250
4251         memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
4252         memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN);
4253
4254         /* TODO: S1G Basic Rate Set is expressed elsewhere */
4255         if (cbss->channel->band == NL80211_BAND_S1GHZ) {
4256                 ieee80211_s1g_sta_rate_init(sta);
4257                 return 0;
4258         }
4259
4260         sband = local->hw.wiphy->bands[cbss->channel->band];
4261
4262         ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
4263                             &rates, &basic_rates, &have_higher_than_11mbit,
4264                             &min_rate, &min_rate_index, shift);
4265
4266         /*
4267          * This used to be a workaround for basic rates missing
4268          * in the association response frame. Now that we no
4269          * longer use the basic rates from there, it probably
4270          * doesn't happen any more, but keep the workaround so
4271          * in case some *other* APs are buggy in different ways
4272          * we can connect -- with a warning.
4273          * Allow this workaround only in case the AP provided at least
4274          * one rate.
4275          */
4276         if (min_rate_index < 0) {
4277                 link_info(link, "No legacy rates in association response\n");
4278                 return -EINVAL;
4279         } else if (!basic_rates) {
4280                 link_info(link, "No basic rates, using min rate instead\n");
4281                 basic_rates = BIT(min_rate_index);
4282         }
4283
4284         if (rates)
4285                 link_sta->pub->supp_rates[cbss->channel->band] = rates;
4286         else
4287                 link_info(link, "No rates found, keeping mandatory only\n");
4288
4289         link->conf->basic_rates = basic_rates;
4290
4291         /* cf. IEEE 802.11 9.2.12 */
4292         link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
4293                                    have_higher_than_11mbit;
4294
4295         return 0;
4296 }
4297
4298 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
4299                                   struct cfg80211_bss *cbss)
4300 {
4301         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4302         const struct element *ht_cap_elem, *vht_cap_elem;
4303         const struct cfg80211_bss_ies *ies;
4304         const struct ieee80211_ht_cap *ht_cap;
4305         const struct ieee80211_vht_cap *vht_cap;
4306         const struct ieee80211_he_cap_elem *he_cap;
4307         const struct element *he_cap_elem;
4308         u16 mcs_80_map, mcs_160_map;
4309         int i, mcs_nss_size;
4310         bool support_160;
4311         u8 chains = 1;
4312
4313         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)
4314                 return chains;
4315
4316         ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
4317         if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
4318                 ht_cap = (void *)ht_cap_elem->data;
4319                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4320                 /*
4321                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4322                  *       "Tx Unequal Modulation Supported" fields.
4323                  */
4324         }
4325
4326         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
4327                 return chains;
4328
4329         vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
4330         if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
4331                 u8 nss;
4332                 u16 tx_mcs_map;
4333
4334                 vht_cap = (void *)vht_cap_elem->data;
4335                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4336                 for (nss = 8; nss > 0; nss--) {
4337                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4338                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4339                                 break;
4340                 }
4341                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4342                 chains = max(chains, nss);
4343         }
4344
4345         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE)
4346                 return chains;
4347
4348         ies = rcu_dereference(cbss->ies);
4349         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4350                                              ies->data, ies->len);
4351
4352         if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
4353                 return chains;
4354
4355         /* skip one byte ext_tag_id */
4356         he_cap = (void *)(he_cap_elem->data + 1);
4357         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4358
4359         /* invalid HE IE */
4360         if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
4361                 return chains;
4362
4363         /* mcs_nss is right after he_cap info */
4364         he_mcs_nss_supp = (void *)(he_cap + 1);
4365
4366         mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4367
4368         for (i = 7; i >= 0; i--) {
4369                 u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
4370
4371                 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4372                         chains = max_t(u8, chains, i + 1);
4373                         break;
4374                 }
4375         }
4376
4377         support_160 = he_cap->phy_cap_info[0] &
4378                       IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
4379
4380         if (!support_160)
4381                 return chains;
4382
4383         mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
4384         for (i = 7; i >= 0; i--) {
4385                 u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
4386
4387                 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4388                         chains = max_t(u8, chains, i + 1);
4389                         break;
4390                 }
4391         }
4392
4393         return chains;
4394 }
4395
4396 static bool
4397 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4398                                      const struct cfg80211_bss_ies *ies,
4399                                      const struct ieee80211_he_operation *he_op)
4400 {
4401         const struct element *he_cap_elem;
4402         const struct ieee80211_he_cap_elem *he_cap;
4403         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4404         u16 mcs_80_map_tx, mcs_80_map_rx;
4405         u16 ap_min_req_set;
4406         int mcs_nss_size;
4407         int nss;
4408
4409         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4410                                              ies->data, ies->len);
4411
4412         if (!he_cap_elem)
4413                 return false;
4414
4415         /* invalid HE IE */
4416         if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
4417                 sdata_info(sdata,
4418                            "Invalid HE elem, Disable HE\n");
4419                 return false;
4420         }
4421
4422         /* skip one byte ext_tag_id */
4423         he_cap = (void *)(he_cap_elem->data + 1);
4424         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4425
4426         /* invalid HE IE */
4427         if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
4428                 sdata_info(sdata,
4429                            "Invalid HE elem with nss size, Disable HE\n");
4430                 return false;
4431         }
4432
4433         /* mcs_nss is right after he_cap info */
4434         he_mcs_nss_supp = (void *)(he_cap + 1);
4435
4436         mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4437         mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
4438
4439         /* P802.11-REVme/D0.3
4440          * 27.1.1 Introduction to the HE PHY
4441          * ...
4442          * An HE STA shall support the following features:
4443          * ...
4444          * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
4445          * supported channel widths for HE SU PPDUs
4446          */
4447         if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4448             (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
4449                 sdata_info(sdata,
4450                            "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
4451                            mcs_80_map_tx, mcs_80_map_rx);
4452                 return false;
4453         }
4454
4455         if (!he_op)
4456                 return true;
4457
4458         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4459
4460         /*
4461          * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4462          * zeroes, which is nonsense, and completely inconsistent with itself
4463          * (it doesn't have 8 streams). Accept the settings in this case anyway.
4464          */
4465         if (!ap_min_req_set)
4466                 return true;
4467
4468         /* make sure the AP is consistent with itself
4469          *
4470          * P802.11-REVme/D0.3
4471          * 26.17.1 Basic HE BSS operation
4472          *
4473          * A STA that is operating in an HE BSS shall be able to receive and
4474          * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
4475          * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
4476          * MLME-START.request primitive and shall be able to receive at each of
4477          * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
4478          * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
4479          * primitive
4480          */
4481         for (nss = 8; nss > 0; nss--) {
4482                 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4483                 u8 ap_rx_val;
4484                 u8 ap_tx_val;
4485
4486                 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4487                         continue;
4488
4489                 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
4490                 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
4491
4492                 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4493                     ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4494                     ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
4495                         sdata_info(sdata,
4496                                    "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
4497                                    nss, ap_rx_val, ap_rx_val, ap_op_val);
4498                         return false;
4499                 }
4500         }
4501
4502         return true;
4503 }
4504
4505 static bool
4506 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4507                                     struct ieee80211_supported_band *sband,
4508                                     const struct ieee80211_he_operation *he_op)
4509 {
4510         const struct ieee80211_sta_he_cap *sta_he_cap =
4511                 ieee80211_get_he_iftype_cap(sband,
4512                                             ieee80211_vif_type_p2p(&sdata->vif));
4513         u16 ap_min_req_set;
4514         int i;
4515
4516         if (!sta_he_cap || !he_op)
4517                 return false;
4518
4519         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4520
4521         /*
4522          * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4523          * zeroes, which is nonsense, and completely inconsistent with itself
4524          * (it doesn't have 8 streams). Accept the settings in this case anyway.
4525          */
4526         if (!ap_min_req_set)
4527                 return true;
4528
4529         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4530         for (i = 0; i < 3; i++) {
4531                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4532                         &sta_he_cap->he_mcs_nss_supp;
4533                 u16 sta_mcs_map_rx =
4534                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4535                 u16 sta_mcs_map_tx =
4536                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4537                 u8 nss;
4538                 bool verified = true;
4539
4540                 /*
4541                  * For each band there is a maximum of 8 spatial streams
4542                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4543                  * of 2 bits per NSS (1-8), with the values defined in enum
4544                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4545                  * capabilities aren't less than the AP's minimum requirements
4546                  * for this HE BSS per SS.
4547                  * It is enough to find one such band that meets the reqs.
4548                  */
4549                 for (nss = 8; nss > 0; nss--) {
4550                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4551                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4552                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4553
4554                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4555                                 continue;
4556
4557                         /*
4558                          * Make sure the HE AP doesn't require MCSs that aren't
4559                          * supported by the client as required by spec
4560                          *
4561                          * P802.11-REVme/D0.3
4562                          * 26.17.1 Basic HE BSS operation
4563                          *
4564                          * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
4565                          * a BSS, unless it supports (i.e., is able to both transmit and
4566                          * receive using) all of the <HE-MCS, NSS> tuples in the basic
4567                          * HE-MCS and NSS set.
4568                          */
4569                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4570                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4571                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4572                                 verified = false;
4573                                 break;
4574                         }
4575                 }
4576
4577                 if (verified)
4578                         return true;
4579         }
4580
4581         /* If here, STA doesn't meet AP's HE min requirements */
4582         return false;
4583 }
4584
4585 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4586                                   struct ieee80211_link_data *link,
4587                                   struct cfg80211_bss *cbss,
4588                                   ieee80211_conn_flags_t *conn_flags)
4589 {
4590         struct ieee80211_local *local = sdata->local;
4591         const struct ieee80211_ht_cap *ht_cap = NULL;
4592         const struct ieee80211_ht_operation *ht_oper = NULL;
4593         const struct ieee80211_vht_operation *vht_oper = NULL;
4594         const struct ieee80211_he_operation *he_oper = NULL;
4595         const struct ieee80211_eht_operation *eht_oper = NULL;
4596         const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
4597         struct ieee80211_supported_band *sband;
4598         struct cfg80211_chan_def chandef;
4599         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4600         bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
4601         struct ieee80211_bss *bss = (void *)cbss->priv;
4602         struct ieee80211_elems_parse_params parse_params = {
4603                 .bss = cbss,
4604                 .link_id = -1,
4605                 .from_ap = true,
4606         };
4607         struct ieee802_11_elems *elems;
4608         const struct cfg80211_bss_ies *ies;
4609         int ret;
4610         u32 i;
4611         bool have_80mhz;
4612
4613         rcu_read_lock();
4614
4615         ies = rcu_dereference(cbss->ies);
4616         parse_params.start = ies->data;
4617         parse_params.len = ies->len;
4618         elems = ieee802_11_parse_elems_full(&parse_params);
4619         if (!elems) {
4620                 rcu_read_unlock();
4621                 return -ENOMEM;
4622         }
4623
4624         sband = local->hw.wiphy->bands[cbss->channel->band];
4625
4626         *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ |
4627                          IEEE80211_CONN_DISABLE_80P80MHZ |
4628                          IEEE80211_CONN_DISABLE_160MHZ);
4629
4630         /* disable HT/VHT/HE if we don't support them */
4631         if (!sband->ht_cap.ht_supported && !is_6ghz) {
4632                 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
4633                 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4634                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4635                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4636                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4637         }
4638
4639         if (!sband->vht_cap.vht_supported && is_5ghz) {
4640                 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
4641                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4642                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4643                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4644         }
4645
4646         if (!ieee80211_get_he_iftype_cap(sband,
4647                                          ieee80211_vif_type_p2p(&sdata->vif))) {
4648                 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
4649                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4650                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4651         }
4652
4653         if (!ieee80211_get_eht_iftype_cap(sband,
4654                                           ieee80211_vif_type_p2p(&sdata->vif))) {
4655                 mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
4656                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4657         }
4658
4659         if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) {
4660                 ht_oper = elems->ht_operation;
4661                 ht_cap = elems->ht_cap_elem;
4662
4663                 if (!ht_cap) {
4664                         *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4665                         ht_oper = NULL;
4666                 }
4667         }
4668
4669         if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) {
4670                 vht_oper = elems->vht_operation;
4671                 if (vht_oper && !ht_oper) {
4672                         vht_oper = NULL;
4673                         sdata_info(sdata,
4674                                    "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4675                         *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4676                         *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4677                         *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4678                         *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4679                 }
4680
4681                 if (!elems->vht_cap_elem) {
4682                         *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4683                         vht_oper = NULL;
4684                 }
4685         }
4686
4687         if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) {
4688                 he_oper = elems->he_operation;
4689
4690                 if (link && is_6ghz) {
4691                         struct ieee80211_bss_conf *bss_conf;
4692                         u8 j = 0;
4693
4694                         bss_conf = link->conf;
4695
4696                         if (elems->pwr_constr_elem)
4697                                 bss_conf->pwr_reduction = *elems->pwr_constr_elem;
4698
4699                         BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
4700                                      ARRAY_SIZE(elems->tx_pwr_env));
4701
4702                         for (i = 0; i < elems->tx_pwr_env_num; i++) {
4703                                 if (elems->tx_pwr_env_len[i] >
4704                                     sizeof(bss_conf->tx_pwr_env[j]))
4705                                         continue;
4706
4707                                 bss_conf->tx_pwr_env_num++;
4708                                 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
4709                                        elems->tx_pwr_env_len[i]);
4710                                 j++;
4711                         }
4712                 }
4713
4714                 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
4715                     !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
4716                         *conn_flags |= IEEE80211_CONN_DISABLE_HE |
4717                                        IEEE80211_CONN_DISABLE_EHT;
4718         }
4719
4720         /*
4721          * EHT requires HE to be supported as well. Specifically for 6 GHz
4722          * channels, the operation channel information can only be deduced from
4723          * both the 6 GHz operation information (from the HE operation IE) and
4724          * EHT operation.
4725          */
4726         if (!(*conn_flags &
4727                         (IEEE80211_CONN_DISABLE_HE |
4728                          IEEE80211_CONN_DISABLE_EHT)) &&
4729             he_oper) {
4730                 const struct cfg80211_bss_ies *cbss_ies;
4731                 const u8 *eht_oper_ie;
4732
4733                 cbss_ies = rcu_dereference(cbss->ies);
4734                 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
4735                                                    cbss_ies->data, cbss_ies->len);
4736                 if (eht_oper_ie && eht_oper_ie[1] >=
4737                     1 + sizeof(struct ieee80211_eht_operation))
4738                         eht_oper = (void *)(eht_oper_ie + 3);
4739                 else
4740                         eht_oper = NULL;
4741         }
4742
4743         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4744         have_80mhz = false;
4745         for (i = 0; i < sband->n_channels; i++) {
4746                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4747                                                 IEEE80211_CHAN_NO_80MHZ))
4748                         continue;
4749
4750                 have_80mhz = true;
4751                 break;
4752         }
4753
4754         if (!have_80mhz) {
4755                 sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
4756                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4757         }
4758
4759         if (sband->band == NL80211_BAND_S1GHZ) {
4760                 s1g_oper = elems->s1g_oper;
4761                 if (!s1g_oper)
4762                         sdata_info(sdata,
4763                                    "AP missing S1G operation element?\n");
4764         }
4765
4766         *conn_flags |=
4767                 ieee80211_determine_chantype(sdata, link, *conn_flags,
4768                                              sband,
4769                                              cbss->channel,
4770                                              bss->vht_cap_info,
4771                                              ht_oper, vht_oper,
4772                                              he_oper, eht_oper,
4773                                              s1g_oper,
4774                                              &chandef, false);
4775
4776         if (link)
4777                 link->needed_rx_chains =
4778                         min(ieee80211_max_rx_chains(link, cbss),
4779                             local->rx_chains);
4780
4781         rcu_read_unlock();
4782         /* the element data was RCU protected so no longer valid anyway */
4783         kfree(elems);
4784         elems = NULL;
4785
4786         if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) {
4787                 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
4788                 return -EINVAL;
4789         }
4790
4791         if (!link)
4792                 return 0;
4793
4794         /* will change later if needed */
4795         link->smps_mode = IEEE80211_SMPS_OFF;
4796
4797         mutex_lock(&local->mtx);
4798         /*
4799          * If this fails (possibly due to channel context sharing
4800          * on incompatible channels, e.g. 80+80 and 160 sharing the
4801          * same control channel) try to use a smaller bandwidth.
4802          */
4803         ret = ieee80211_link_use_channel(link, &chandef,
4804                                          IEEE80211_CHANCTX_SHARED);
4805
4806         /* don't downgrade for 5 and 10 MHz channels, though. */
4807         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4808             chandef.width == NL80211_CHAN_WIDTH_10)
4809                 goto out;
4810
4811         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4812                 *conn_flags |=
4813                         ieee80211_chandef_downgrade(&chandef);
4814                 ret = ieee80211_link_use_channel(link, &chandef,
4815                                                  IEEE80211_CHANCTX_SHARED);
4816         }
4817  out:
4818         mutex_unlock(&local->mtx);
4819         return ret;
4820 }
4821
4822 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4823                                u8 *dtim_count, u8 *dtim_period)
4824 {
4825         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4826         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4827                                          ies->len);
4828         const struct ieee80211_tim_ie *tim = NULL;
4829         const struct ieee80211_bssid_index *idx;
4830         bool valid = tim_ie && tim_ie[1] >= 2;
4831
4832         if (valid)
4833                 tim = (void *)(tim_ie + 2);
4834
4835         if (dtim_count)
4836                 *dtim_count = valid ? tim->dtim_count : 0;
4837
4838         if (dtim_period)
4839                 *dtim_period = valid ? tim->dtim_period : 0;
4840
4841         /* Check if value is overridden by non-transmitted profile */
4842         if (!idx_ie || idx_ie[1] < 3)
4843                 return valid;
4844
4845         idx = (void *)(idx_ie + 2);
4846
4847         if (dtim_count)
4848                 *dtim_count = idx->dtim_count;
4849
4850         if (dtim_period)
4851                 *dtim_period = idx->dtim_period;
4852
4853         return true;
4854 }
4855
4856 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
4857                                     struct ieee80211_mgmt *mgmt,
4858                                     struct ieee802_11_elems *elems,
4859                                     const u8 *elem_start, unsigned int elem_len)
4860 {
4861         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4862         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
4863         struct ieee80211_local *local = sdata->local;
4864         unsigned int link_id;
4865         struct sta_info *sta;
4866         u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
4867         int err;
4868
4869         mutex_lock(&sdata->local->sta_mtx);
4870         /*
4871          * station info was already allocated and inserted before
4872          * the association and should be available to us
4873          */
4874         sta = sta_info_get(sdata, assoc_data->ap_addr);
4875         if (WARN_ON(!sta))
4876                 goto out_err;
4877
4878         if (sdata->vif.valid_links) {
4879                 u16 valid_links = 0;
4880
4881                 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4882                         if (!assoc_data->link[link_id].bss)
4883                                 continue;
4884                         valid_links |= BIT(link_id);
4885
4886                         if (link_id != assoc_data->assoc_link_id) {
4887                                 err = ieee80211_sta_allocate_link(sta, link_id);
4888                                 if (err)
4889                                         goto out_err;
4890                         }
4891                 }
4892
4893                 ieee80211_vif_set_links(sdata, valid_links);
4894         }
4895
4896         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4897                 struct ieee80211_link_data *link;
4898                 struct link_sta_info *link_sta;
4899
4900                 if (!assoc_data->link[link_id].bss)
4901                         continue;
4902
4903                 link = sdata_dereference(sdata->link[link_id], sdata);
4904                 if (WARN_ON(!link))
4905                         goto out_err;
4906
4907                 if (sdata->vif.valid_links)
4908                         link_info(link,
4909                                   "local address %pM, AP link address %pM\n",
4910                                   link->conf->addr,
4911                                   assoc_data->link[link_id].bss->bssid);
4912
4913                 link_sta = rcu_dereference_protected(sta->link[link_id],
4914                                                      lockdep_is_held(&local->sta_mtx));
4915                 if (WARN_ON(!link_sta))
4916                         goto out_err;
4917
4918                 if (link_id != assoc_data->assoc_link_id) {
4919                         struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
4920                         const struct cfg80211_bss_ies *ies;
4921
4922                         rcu_read_lock();
4923                         ies = rcu_dereference(cbss->ies);
4924                         ieee80211_get_dtim(ies,
4925                                            &link->conf->sync_dtim_count,
4926                                            &link->u.mgd.dtim_period);
4927                         link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
4928                         link->conf->beacon_int = cbss->beacon_interval;
4929                         rcu_read_unlock();
4930
4931                         err = ieee80211_prep_channel(sdata, link, cbss,
4932                                                      &link->u.mgd.conn_flags);
4933                         if (err) {
4934                                 link_info(link, "prep_channel failed\n");
4935                                 goto out_err;
4936                         }
4937                 }
4938
4939                 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
4940                                                    assoc_data->link[link_id].bss);
4941                 if (err)
4942                         goto out_err;
4943
4944                 if (!ieee80211_assoc_config_link(link, link_sta,
4945                                                  assoc_data->link[link_id].bss,
4946                                                  mgmt, elem_start, elem_len,
4947                                                  &changed[link_id]))
4948                         goto out_err;
4949
4950                 if (link_id != assoc_data->assoc_link_id) {
4951                         err = ieee80211_sta_activate_link(sta, link_id);
4952                         if (err)
4953                                 goto out_err;
4954                 }
4955         }
4956
4957         rate_control_rate_init(sta);
4958
4959         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
4960                 set_sta_flag(sta, WLAN_STA_MFP);
4961                 sta->sta.mfp = true;
4962         } else {
4963                 sta->sta.mfp = false;
4964         }
4965
4966         ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab,
4967                                               elems->ext_capab_len);
4968
4969         sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
4970                        local->hw.queues >= IEEE80211_NUM_ACS;
4971
4972         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
4973         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
4974                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
4975         if (err) {
4976                 sdata_info(sdata,
4977                            "failed to move station %pM to desired state\n",
4978                            sta->sta.addr);
4979                 WARN_ON(__sta_info_destroy(sta));
4980                 goto out_err;
4981         }
4982
4983         if (sdata->wdev.use_4addr)
4984                 drv_sta_set_4addr(local, sdata, &sta->sta, true);
4985
4986         mutex_unlock(&sdata->local->sta_mtx);
4987
4988         ieee80211_set_associated(sdata, assoc_data, changed);
4989
4990         /*
4991          * If we're using 4-addr mode, let the AP know that we're
4992          * doing so, so that it can create the STA VLAN on its side
4993          */
4994         if (ifmgd->use_4addr)
4995                 ieee80211_send_4addr_nullfunc(local, sdata);
4996
4997         /*
4998          * Start timer to probe the connection to the AP now.
4999          * Also start the timer that will detect beacon loss.
5000          */
5001         ieee80211_sta_reset_beacon_monitor(sdata);
5002         ieee80211_sta_reset_conn_monitor(sdata);
5003
5004         return true;
5005 out_err:
5006         eth_zero_addr(sdata->vif.cfg.ap_addr);
5007         mutex_unlock(&sdata->local->sta_mtx);
5008         return false;
5009 }
5010
5011 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
5012                                          struct ieee80211_mgmt *mgmt,
5013                                          size_t len)
5014 {
5015         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5016         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5017         u16 capab_info, status_code, aid;
5018         struct ieee80211_elems_parse_params parse_params = {
5019                 .bss = NULL,
5020                 .link_id = -1,
5021                 .from_ap = true,
5022         };
5023         struct ieee802_11_elems *elems;
5024         int ac;
5025         const u8 *elem_start;
5026         unsigned int elem_len;
5027         bool reassoc;
5028         struct ieee80211_event event = {
5029                 .type = MLME_EVENT,
5030                 .u.mlme.data = ASSOC_EVENT,
5031         };
5032         struct ieee80211_prep_tx_info info = {};
5033         struct cfg80211_rx_assoc_resp resp = {
5034                 .uapsd_queues = -1,
5035         };
5036         u8 ap_mld_addr[ETH_ALEN] __aligned(2);
5037         unsigned int link_id;
5038
5039         sdata_assert_lock(sdata);
5040
5041         if (!assoc_data)
5042                 return;
5043
5044         if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) ||
5045             !ether_addr_equal(assoc_data->ap_addr, mgmt->sa))
5046                 return;
5047
5048         /*
5049          * AssocResp and ReassocResp have identical structure, so process both
5050          * of them in this function.
5051          */
5052
5053         if (len < 24 + 6)
5054                 return;
5055
5056         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
5057         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
5058         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
5059         if (assoc_data->s1g)
5060                 elem_start = mgmt->u.s1g_assoc_resp.variable;
5061         else
5062                 elem_start = mgmt->u.assoc_resp.variable;
5063
5064         /*
5065          * Note: this may not be perfect, AP might misbehave - if
5066          * anyone needs to rely on perfect complete notification
5067          * with the exact right subtype, then we need to track what
5068          * we actually transmitted.
5069          */
5070         info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
5071                                  IEEE80211_STYPE_ASSOC_REQ;
5072
5073         if (assoc_data->fils_kek_len &&
5074             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
5075                 return;
5076
5077         elem_len = len - (elem_start - (u8 *)mgmt);
5078         parse_params.start = elem_start;
5079         parse_params.len = elem_len;
5080         elems = ieee802_11_parse_elems_full(&parse_params);
5081         if (!elems)
5082                 goto notify_driver;
5083
5084         if (elems->aid_resp)
5085                 aid = le16_to_cpu(elems->aid_resp->aid);
5086         else if (assoc_data->s1g)
5087                 aid = 0; /* TODO */
5088         else
5089                 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
5090
5091         /*
5092          * The 5 MSB of the AID field are reserved
5093          * (802.11-2016 9.4.1.8 AID field)
5094          */
5095         aid &= 0x7ff;
5096
5097         sdata_info(sdata,
5098                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
5099                    reassoc ? "Rea" : "A", assoc_data->ap_addr,
5100                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
5101
5102         ifmgd->broken_ap = false;
5103
5104         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
5105             elems->timeout_int &&
5106             elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
5107                 u32 tu, ms;
5108
5109                 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr,
5110                                         le32_to_cpu(elems->timeout_int->value));
5111
5112                 tu = le32_to_cpu(elems->timeout_int->value);
5113                 ms = tu * 1024 / 1000;
5114                 sdata_info(sdata,
5115                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
5116                            assoc_data->ap_addr, tu, ms);
5117                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
5118                 assoc_data->timeout_started = true;
5119                 if (ms > IEEE80211_ASSOC_TIMEOUT)
5120                         run_again(sdata, assoc_data->timeout);
5121                 goto notify_driver;
5122         }
5123
5124         if (status_code != WLAN_STATUS_SUCCESS) {
5125                 sdata_info(sdata, "%pM denied association (code=%d)\n",
5126                            assoc_data->ap_addr, status_code);
5127                 event.u.mlme.status = MLME_DENIED;
5128                 event.u.mlme.reason = status_code;
5129                 drv_event_callback(sdata->local, sdata, &event);
5130         } else {
5131                 if (aid == 0 || aid > IEEE80211_MAX_AID) {
5132                         sdata_info(sdata,
5133                                    "invalid AID value %d (out of range), turn off PS\n",
5134                                    aid);
5135                         aid = 0;
5136                         ifmgd->broken_ap = true;
5137                 }
5138
5139                 if (sdata->vif.valid_links) {
5140                         if (!elems->multi_link) {
5141                                 sdata_info(sdata,
5142                                            "MLO association with %pM but no multi-link element in response!\n",
5143                                            assoc_data->ap_addr);
5144                                 goto abandon_assoc;
5145                         }
5146
5147                         if (le16_get_bits(elems->multi_link->control,
5148                                           IEEE80211_ML_CONTROL_TYPE) !=
5149                                         IEEE80211_ML_CONTROL_TYPE_BASIC) {
5150                                 sdata_info(sdata,
5151                                            "bad multi-link element (control=0x%x)\n",
5152                                            le16_to_cpu(elems->multi_link->control));
5153                                 goto abandon_assoc;
5154                         } else {
5155                                 struct ieee80211_mle_basic_common_info *common;
5156
5157                                 common = (void *)elems->multi_link->variable;
5158
5159                                 if (memcmp(assoc_data->ap_addr,
5160                                            common->mld_mac_addr, ETH_ALEN)) {
5161                                         sdata_info(sdata,
5162                                                    "AP MLD MAC address mismatch: got %pM expected %pM\n",
5163                                                    common->mld_mac_addr,
5164                                                    assoc_data->ap_addr);
5165                                         goto abandon_assoc;
5166                                 }
5167                         }
5168                 }
5169
5170                 sdata->vif.cfg.aid = aid;
5171
5172                 if (!ieee80211_assoc_success(sdata, mgmt, elems,
5173                                              elem_start, elem_len)) {
5174                         /* oops -- internal error -- send timeout for now */
5175                         ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
5176                         goto notify_driver;
5177                 }
5178                 event.u.mlme.status = MLME_SUCCESS;
5179                 drv_event_callback(sdata->local, sdata, &event);
5180                 sdata_info(sdata, "associated\n");
5181
5182                 info.success = 1;
5183         }
5184
5185         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5186                 struct ieee80211_link_data *link;
5187
5188                 link = sdata_dereference(sdata->link[link_id], sdata);
5189                 if (!link)
5190                         continue;
5191                 if (!assoc_data->link[link_id].bss)
5192                         continue;
5193                 resp.links[link_id].bss = assoc_data->link[link_id].bss;
5194                 resp.links[link_id].addr = link->conf->addr;
5195
5196                 /* get uapsd queues configuration - same for all links */
5197                 resp.uapsd_queues = 0;
5198                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
5199                         if (link->tx_conf[ac].uapsd)
5200                                 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
5201         }
5202
5203         if (sdata->vif.valid_links) {
5204                 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr);
5205                 resp.ap_mld_addr = ap_mld_addr;
5206         }
5207
5208         ieee80211_destroy_assoc_data(sdata,
5209                                      status_code == WLAN_STATUS_SUCCESS ?
5210                                         ASSOC_SUCCESS :
5211                                         ASSOC_REJECTED);
5212
5213         resp.buf = (u8 *)mgmt;
5214         resp.len = len;
5215         resp.req_ies = ifmgd->assoc_req_ies;
5216         resp.req_ies_len = ifmgd->assoc_req_ies_len;
5217         cfg80211_rx_assoc_resp(sdata->dev, &resp);
5218 notify_driver:
5219         drv_mgd_complete_tx(sdata->local, sdata, &info);
5220         kfree(elems);
5221         return;
5222 abandon_assoc:
5223         ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
5224         goto notify_driver;
5225 }
5226
5227 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
5228                                   struct ieee80211_mgmt *mgmt, size_t len,
5229                                   struct ieee80211_rx_status *rx_status)
5230 {
5231         struct ieee80211_sub_if_data *sdata = link->sdata;
5232         struct ieee80211_local *local = sdata->local;
5233         struct ieee80211_bss *bss;
5234         struct ieee80211_channel *channel;
5235
5236         sdata_assert_lock(sdata);
5237
5238         channel = ieee80211_get_channel_khz(local->hw.wiphy,
5239                                         ieee80211_rx_status_to_khz(rx_status));
5240         if (!channel)
5241                 return;
5242
5243         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
5244         if (bss) {
5245                 link->conf->beacon_rate = bss->beacon_rate;
5246                 ieee80211_rx_bss_put(local, bss);
5247         }
5248 }
5249
5250
5251 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
5252                                          struct sk_buff *skb)
5253 {
5254         struct ieee80211_sub_if_data *sdata = link->sdata;
5255         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5256         struct ieee80211_if_managed *ifmgd;
5257         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
5258         struct ieee80211_channel *channel;
5259         size_t baselen, len = skb->len;
5260
5261         ifmgd = &sdata->u.mgd;
5262
5263         sdata_assert_lock(sdata);
5264
5265         /*
5266          * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
5267          * "If a 6 GHz AP receives a Probe Request frame  and responds with
5268          * a Probe Response frame [..], the Address 1 field of the Probe
5269          * Response frame shall be set to the broadcast address [..]"
5270          * So, on 6GHz band we should also accept broadcast responses.
5271          */
5272         channel = ieee80211_get_channel(sdata->local->hw.wiphy,
5273                                         rx_status->freq);
5274         if (!channel)
5275                 return;
5276
5277         if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
5278             (channel->band != NL80211_BAND_6GHZ ||
5279              !is_broadcast_ether_addr(mgmt->da)))
5280                 return; /* ignore ProbeResp to foreign address */
5281
5282         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
5283         if (baselen > len)
5284                 return;
5285
5286         ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5287
5288         if (ifmgd->associated &&
5289             ether_addr_equal(mgmt->bssid, link->u.mgd.bssid))
5290                 ieee80211_reset_ap_probe(sdata);
5291 }
5292
5293 /*
5294  * This is the canonical list of information elements we care about,
5295  * the filter code also gives us all changes to the Microsoft OUI
5296  * (00:50:F2) vendor IE which is used for WMM which we need to track,
5297  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
5298  * changes to requested client power.
5299  *
5300  * We implement beacon filtering in software since that means we can
5301  * avoid processing the frame here and in cfg80211, and userspace
5302  * will not be able to tell whether the hardware supports it or not.
5303  *
5304  * XXX: This list needs to be dynamic -- userspace needs to be able to
5305  *      add items it requires. It also needs to be able to tell us to
5306  *      look out for other vendor IEs.
5307  */
5308 static const u64 care_about_ies =
5309         (1ULL << WLAN_EID_COUNTRY) |
5310         (1ULL << WLAN_EID_ERP_INFO) |
5311         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
5312         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
5313         (1ULL << WLAN_EID_HT_CAPABILITY) |
5314         (1ULL << WLAN_EID_HT_OPERATION) |
5315         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
5316
5317 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
5318                                         struct ieee80211_if_managed *ifmgd,
5319                                         struct ieee80211_bss_conf *bss_conf,
5320                                         struct ieee80211_local *local,
5321                                         struct ieee80211_rx_status *rx_status)
5322 {
5323         struct ieee80211_sub_if_data *sdata = link->sdata;
5324
5325         /* Track average RSSI from the Beacon frames of the current AP */
5326
5327         if (!link->u.mgd.tracking_signal_avg) {
5328                 link->u.mgd.tracking_signal_avg = true;
5329                 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal);
5330                 link->u.mgd.last_cqm_event_signal = 0;
5331                 link->u.mgd.count_beacon_signal = 1;
5332                 link->u.mgd.last_ave_beacon_signal = 0;
5333         } else {
5334                 link->u.mgd.count_beacon_signal++;
5335         }
5336
5337         ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal,
5338                                -rx_status->signal);
5339
5340         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
5341             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5342                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5343                 int last_sig = link->u.mgd.last_ave_beacon_signal;
5344                 struct ieee80211_event event = {
5345                         .type = RSSI_EVENT,
5346                 };
5347
5348                 /*
5349                  * if signal crosses either of the boundaries, invoke callback
5350                  * with appropriate parameters
5351                  */
5352                 if (sig > ifmgd->rssi_max_thold &&
5353                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
5354                         link->u.mgd.last_ave_beacon_signal = sig;
5355                         event.u.rssi.data = RSSI_EVENT_HIGH;
5356                         drv_event_callback(local, sdata, &event);
5357                 } else if (sig < ifmgd->rssi_min_thold &&
5358                            (last_sig >= ifmgd->rssi_max_thold ||
5359                            last_sig == 0)) {
5360                         link->u.mgd.last_ave_beacon_signal = sig;
5361                         event.u.rssi.data = RSSI_EVENT_LOW;
5362                         drv_event_callback(local, sdata, &event);
5363                 }
5364         }
5365
5366         if (bss_conf->cqm_rssi_thold &&
5367             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
5368             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
5369                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5370                 int last_event = link->u.mgd.last_cqm_event_signal;
5371                 int thold = bss_conf->cqm_rssi_thold;
5372                 int hyst = bss_conf->cqm_rssi_hyst;
5373
5374                 if (sig < thold &&
5375                     (last_event == 0 || sig < last_event - hyst)) {
5376                         link->u.mgd.last_cqm_event_signal = sig;
5377                         ieee80211_cqm_rssi_notify(
5378                                 &sdata->vif,
5379                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5380                                 sig, GFP_KERNEL);
5381                 } else if (sig > thold &&
5382                            (last_event == 0 || sig > last_event + hyst)) {
5383                         link->u.mgd.last_cqm_event_signal = sig;
5384                         ieee80211_cqm_rssi_notify(
5385                                 &sdata->vif,
5386                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5387                                 sig, GFP_KERNEL);
5388                 }
5389         }
5390
5391         if (bss_conf->cqm_rssi_low &&
5392             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5393                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5394                 int last_event = link->u.mgd.last_cqm_event_signal;
5395                 int low = bss_conf->cqm_rssi_low;
5396                 int high = bss_conf->cqm_rssi_high;
5397
5398                 if (sig < low &&
5399                     (last_event == 0 || last_event >= low)) {
5400                         link->u.mgd.last_cqm_event_signal = sig;
5401                         ieee80211_cqm_rssi_notify(
5402                                 &sdata->vif,
5403                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5404                                 sig, GFP_KERNEL);
5405                 } else if (sig > high &&
5406                            (last_event == 0 || last_event <= high)) {
5407                         link->u.mgd.last_cqm_event_signal = sig;
5408                         ieee80211_cqm_rssi_notify(
5409                                 &sdata->vif,
5410                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5411                                 sig, GFP_KERNEL);
5412                 }
5413         }
5414 }
5415
5416 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
5417                                     struct cfg80211_bss *bss)
5418 {
5419         if (ether_addr_equal(tx_bssid, bss->bssid))
5420                 return true;
5421         if (!bss->transmitted_bss)
5422                 return false;
5423         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
5424 }
5425
5426 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
5427                                      struct ieee80211_hdr *hdr, size_t len,
5428                                      struct ieee80211_rx_status *rx_status)
5429 {
5430         struct ieee80211_sub_if_data *sdata = link->sdata;
5431         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5432         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5433         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
5434         struct ieee80211_mgmt *mgmt = (void *) hdr;
5435         size_t baselen;
5436         struct ieee802_11_elems *elems;
5437         struct ieee80211_local *local = sdata->local;
5438         struct ieee80211_chanctx_conf *chanctx_conf;
5439         struct ieee80211_channel *chan;
5440         struct link_sta_info *link_sta;
5441         struct sta_info *sta;
5442         u32 changed = 0;
5443         bool erp_valid;
5444         u8 erp_value = 0;
5445         u32 ncrc = 0;
5446         u8 *bssid, *variable = mgmt->u.beacon.variable;
5447         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
5448         struct ieee80211_elems_parse_params parse_params = {
5449                 .link_id = -1,
5450                 .from_ap = true,
5451         };
5452
5453         sdata_assert_lock(sdata);
5454
5455         /* Process beacon from the current BSS */
5456         bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
5457         if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
5458                 struct ieee80211_ext *ext = (void *) mgmt;
5459
5460                 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
5461                         variable = ext->u.s1g_short_beacon.variable;
5462                 else
5463                         variable = ext->u.s1g_beacon.variable;
5464         }
5465
5466         baselen = (u8 *) variable - (u8 *) mgmt;
5467         if (baselen > len)
5468                 return;
5469
5470         parse_params.start = variable;
5471         parse_params.len = len - baselen;
5472
5473         rcu_read_lock();
5474         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
5475         if (!chanctx_conf) {
5476                 rcu_read_unlock();
5477                 return;
5478         }
5479
5480         if (ieee80211_rx_status_to_khz(rx_status) !=
5481             ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
5482                 rcu_read_unlock();
5483                 return;
5484         }
5485         chan = chanctx_conf->def.chan;
5486         rcu_read_unlock();
5487
5488         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
5489             !WARN_ON(sdata->vif.valid_links) &&
5490             ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) {
5491                 parse_params.bss = ifmgd->assoc_data->link[0].bss;
5492                 elems = ieee802_11_parse_elems_full(&parse_params);
5493                 if (!elems)
5494                         return;
5495
5496                 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5497
5498                 if (elems->dtim_period)
5499                         link->u.mgd.dtim_period = elems->dtim_period;
5500                 link->u.mgd.have_beacon = true;
5501                 ifmgd->assoc_data->need_beacon = false;
5502                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5503                         link->conf->sync_tsf =
5504                                 le64_to_cpu(mgmt->u.beacon.timestamp);
5505                         link->conf->sync_device_ts =
5506                                 rx_status->device_timestamp;
5507                         link->conf->sync_dtim_count = elems->dtim_count;
5508                 }
5509
5510                 if (elems->mbssid_config_ie)
5511                         bss_conf->profile_periodicity =
5512                                 elems->mbssid_config_ie->profile_periodicity;
5513                 else
5514                         bss_conf->profile_periodicity = 0;
5515
5516                 if (elems->ext_capab_len >= 11 &&
5517                     (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5518                         bss_conf->ema_ap = true;
5519                 else
5520                         bss_conf->ema_ap = false;
5521
5522                 /* continue assoc process */
5523                 ifmgd->assoc_data->timeout = jiffies;
5524                 ifmgd->assoc_data->timeout_started = true;
5525                 run_again(sdata, ifmgd->assoc_data->timeout);
5526                 kfree(elems);
5527                 return;
5528         }
5529
5530         if (!ifmgd->associated ||
5531             !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss))
5532                 return;
5533         bssid = link->u.mgd.bssid;
5534
5535         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
5536                 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
5537                                             local, rx_status);
5538
5539         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
5540                 mlme_dbg_ratelimited(sdata,
5541                                      "cancelling AP probe due to a received beacon\n");
5542                 ieee80211_reset_ap_probe(sdata);
5543         }
5544
5545         /*
5546          * Push the beacon loss detection into the future since
5547          * we are processing a beacon from the AP just now.
5548          */
5549         ieee80211_sta_reset_beacon_monitor(sdata);
5550
5551         /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
5552          * element (which carries the beacon interval). Don't forget to add a
5553          * bit to care_about_ies[] above if mac80211 is interested in a
5554          * changing S1G element.
5555          */
5556         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5557                 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
5558         parse_params.bss = link->u.mgd.bss;
5559         parse_params.filter = care_about_ies;
5560         parse_params.crc = ncrc;
5561         elems = ieee802_11_parse_elems_full(&parse_params);
5562         if (!elems)
5563                 return;
5564         ncrc = elems->crc;
5565
5566         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
5567             ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) {
5568                 if (local->hw.conf.dynamic_ps_timeout > 0) {
5569                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
5570                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
5571                                 ieee80211_hw_config(local,
5572                                                     IEEE80211_CONF_CHANGE_PS);
5573                         }
5574                         ieee80211_send_nullfunc(local, sdata, false);
5575                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
5576                         local->pspolling = true;
5577
5578                         /*
5579                          * Here is assumed that the driver will be
5580                          * able to send ps-poll frame and receive a
5581                          * response even though power save mode is
5582                          * enabled, but some drivers might require
5583                          * to disable power save here. This needs
5584                          * to be investigated.
5585                          */
5586                         ieee80211_send_pspoll(local, sdata);
5587                 }
5588         }
5589
5590         if (sdata->vif.p2p ||
5591             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
5592                 struct ieee80211_p2p_noa_attr noa = {};
5593                 int ret;
5594
5595                 ret = cfg80211_get_p2p_attr(variable,
5596                                             len - baselen,
5597                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
5598                                             (u8 *) &noa, sizeof(noa));
5599                 if (ret >= 2) {
5600                         if (link->u.mgd.p2p_noa_index != noa.index) {
5601                                 /* valid noa_attr and index changed */
5602                                 link->u.mgd.p2p_noa_index = noa.index;
5603                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
5604                                 changed |= BSS_CHANGED_P2P_PS;
5605                                 /*
5606                                  * make sure we update all information, the CRC
5607                                  * mechanism doesn't look at P2P attributes.
5608                                  */
5609                                 link->u.mgd.beacon_crc_valid = false;
5610                         }
5611                 } else if (link->u.mgd.p2p_noa_index != -1) {
5612                         /* noa_attr not found and we had valid noa_attr before */
5613                         link->u.mgd.p2p_noa_index = -1;
5614                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
5615                         changed |= BSS_CHANGED_P2P_PS;
5616                         link->u.mgd.beacon_crc_valid = false;
5617                 }
5618         }
5619
5620         if (link->u.mgd.csa_waiting_bcn)
5621                 ieee80211_chswitch_post_beacon(link);
5622
5623         /*
5624          * Update beacon timing and dtim count on every beacon appearance. This
5625          * will allow the driver to use the most updated values. Do it before
5626          * comparing this one with last received beacon.
5627          * IMPORTANT: These parameters would possibly be out of sync by the time
5628          * the driver will use them. The synchronized view is currently
5629          * guaranteed only in certain callbacks.
5630          */
5631         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
5632             !ieee80211_is_s1g_beacon(hdr->frame_control)) {
5633                 link->conf->sync_tsf =
5634                         le64_to_cpu(mgmt->u.beacon.timestamp);
5635                 link->conf->sync_device_ts =
5636                         rx_status->device_timestamp;
5637                 link->conf->sync_dtim_count = elems->dtim_count;
5638         }
5639
5640         if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) ||
5641             ieee80211_is_s1g_short_beacon(mgmt->frame_control))
5642                 goto free;
5643         link->u.mgd.beacon_crc = ncrc;
5644         link->u.mgd.beacon_crc_valid = true;
5645
5646         ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5647
5648         ieee80211_sta_process_chanswitch(link, rx_status->mactime,
5649                                          rx_status->device_timestamp,
5650                                          elems, true);
5651
5652         if (!link->u.mgd.disable_wmm_tracking &&
5653             ieee80211_sta_wmm_params(local, link, elems->wmm_param,
5654                                      elems->wmm_param_len,
5655                                      elems->mu_edca_param_set))
5656                 changed |= BSS_CHANGED_QOS;
5657
5658         /*
5659          * If we haven't had a beacon before, tell the driver about the
5660          * DTIM period (and beacon timing if desired) now.
5661          */
5662         if (!link->u.mgd.have_beacon) {
5663                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
5664                 bss_conf->dtim_period = elems->dtim_period ?: 1;
5665
5666                 changed |= BSS_CHANGED_BEACON_INFO;
5667                 link->u.mgd.have_beacon = true;
5668
5669                 mutex_lock(&local->iflist_mtx);
5670                 ieee80211_recalc_ps(local);
5671                 mutex_unlock(&local->iflist_mtx);
5672
5673                 ieee80211_recalc_ps_vif(sdata);
5674         }
5675
5676         if (elems->erp_info) {
5677                 erp_valid = true;
5678                 erp_value = elems->erp_info[0];
5679         } else {
5680                 erp_valid = false;
5681         }
5682
5683         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5684                 changed |= ieee80211_handle_bss_capability(link,
5685                                 le16_to_cpu(mgmt->u.beacon.capab_info),
5686                                 erp_valid, erp_value);
5687
5688         mutex_lock(&local->sta_mtx);
5689         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
5690         if (WARN_ON(!sta)) {
5691                 mutex_unlock(&local->sta_mtx);
5692                 goto free;
5693         }
5694         link_sta = rcu_dereference_protected(sta->link[link->link_id],
5695                                              lockdep_is_held(&local->sta_mtx));
5696         if (WARN_ON(!link_sta)) {
5697                 mutex_unlock(&local->sta_mtx);
5698                 goto free;
5699         }
5700
5701         changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
5702
5703         if (ieee80211_config_bw(link, elems->ht_cap_elem,
5704                                 elems->vht_cap_elem, elems->ht_operation,
5705                                 elems->vht_operation, elems->he_operation,
5706                                 elems->eht_operation,
5707                                 elems->s1g_oper, bssid, &changed)) {
5708                 mutex_unlock(&local->sta_mtx);
5709                 sdata_info(sdata,
5710                            "failed to follow AP %pM bandwidth change, disconnect\n",
5711                            bssid);
5712                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5713                                        WLAN_REASON_DEAUTH_LEAVING,
5714                                        true, deauth_buf);
5715                 ieee80211_report_disconnect(sdata, deauth_buf,
5716                                             sizeof(deauth_buf), true,
5717                                             WLAN_REASON_DEAUTH_LEAVING,
5718                                             false);
5719                 goto free;
5720         }
5721
5722         if (sta && elems->opmode_notif)
5723                 ieee80211_vht_handle_opmode(sdata, link_sta,
5724                                             *elems->opmode_notif,
5725                                             rx_status->band);
5726         mutex_unlock(&local->sta_mtx);
5727
5728         changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
5729                                                elems->country_elem,
5730                                                elems->country_elem_len,
5731                                                elems->pwr_constr_elem,
5732                                                elems->cisco_dtpc_elem);
5733
5734         ieee80211_link_info_change_notify(sdata, link, changed);
5735 free:
5736         kfree(elems);
5737 }
5738
5739 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
5740                                  struct sk_buff *skb)
5741 {
5742         struct ieee80211_link_data *link = &sdata->deflink;
5743         struct ieee80211_rx_status *rx_status;
5744         struct ieee80211_hdr *hdr;
5745         u16 fc;
5746
5747         rx_status = (struct ieee80211_rx_status *) skb->cb;
5748         hdr = (struct ieee80211_hdr *) skb->data;
5749         fc = le16_to_cpu(hdr->frame_control);
5750
5751         sdata_lock(sdata);
5752         switch (fc & IEEE80211_FCTL_STYPE) {
5753         case IEEE80211_STYPE_S1G_BEACON:
5754                 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
5755                 break;
5756         }
5757         sdata_unlock(sdata);
5758 }
5759
5760 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
5761                                   struct sk_buff *skb)
5762 {
5763         struct ieee80211_link_data *link = &sdata->deflink;
5764         struct ieee80211_rx_status *rx_status;
5765         struct ieee80211_mgmt *mgmt;
5766         u16 fc;
5767         int ies_len;
5768
5769         rx_status = (struct ieee80211_rx_status *) skb->cb;
5770         mgmt = (struct ieee80211_mgmt *) skb->data;
5771         fc = le16_to_cpu(mgmt->frame_control);
5772
5773         sdata_lock(sdata);
5774
5775         if (rx_status->link_valid) {
5776                 link = sdata_dereference(sdata->link[rx_status->link_id],
5777                                          sdata);
5778                 if (!link)
5779                         goto out;
5780         }
5781
5782         switch (fc & IEEE80211_FCTL_STYPE) {
5783         case IEEE80211_STYPE_BEACON:
5784                 ieee80211_rx_mgmt_beacon(link, (void *)mgmt,
5785                                          skb->len, rx_status);
5786                 break;
5787         case IEEE80211_STYPE_PROBE_RESP:
5788                 ieee80211_rx_mgmt_probe_resp(link, skb);
5789                 break;
5790         case IEEE80211_STYPE_AUTH:
5791                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
5792                 break;
5793         case IEEE80211_STYPE_DEAUTH:
5794                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
5795                 break;
5796         case IEEE80211_STYPE_DISASSOC:
5797                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
5798                 break;
5799         case IEEE80211_STYPE_ASSOC_RESP:
5800         case IEEE80211_STYPE_REASSOC_RESP:
5801                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
5802                 break;
5803         case IEEE80211_STYPE_ACTION:
5804                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
5805                         struct ieee802_11_elems *elems;
5806
5807                         ies_len = skb->len -
5808                                   offsetof(struct ieee80211_mgmt,
5809                                            u.action.u.chan_switch.variable);
5810
5811                         if (ies_len < 0)
5812                                 break;
5813
5814                         /* CSA IE cannot be overridden, no need for BSSID */
5815                         elems = ieee802_11_parse_elems(
5816                                         mgmt->u.action.u.chan_switch.variable,
5817                                         ies_len, true, NULL);
5818
5819                         if (elems && !elems->parse_error)
5820                                 ieee80211_sta_process_chanswitch(link,
5821                                                                  rx_status->mactime,
5822                                                                  rx_status->device_timestamp,
5823                                                                  elems, false);
5824                         kfree(elems);
5825                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
5826                         struct ieee802_11_elems *elems;
5827
5828                         ies_len = skb->len -
5829                                   offsetof(struct ieee80211_mgmt,
5830                                            u.action.u.ext_chan_switch.variable);
5831
5832                         if (ies_len < 0)
5833                                 break;
5834
5835                         /*
5836                          * extended CSA IE can't be overridden, no need for
5837                          * BSSID
5838                          */
5839                         elems = ieee802_11_parse_elems(
5840                                         mgmt->u.action.u.ext_chan_switch.variable,
5841                                         ies_len, true, NULL);
5842
5843                         if (elems && !elems->parse_error) {
5844                                 /* for the handling code pretend it was an IE */
5845                                 elems->ext_chansw_ie =
5846                                         &mgmt->u.action.u.ext_chan_switch.data;
5847
5848                                 ieee80211_sta_process_chanswitch(link,
5849                                                                  rx_status->mactime,
5850                                                                  rx_status->device_timestamp,
5851                                                                  elems, false);
5852                         }
5853
5854                         kfree(elems);
5855                 }
5856                 break;
5857         }
5858 out:
5859         sdata_unlock(sdata);
5860 }
5861
5862 static void ieee80211_sta_timer(struct timer_list *t)
5863 {
5864         struct ieee80211_sub_if_data *sdata =
5865                 from_timer(sdata, t, u.mgd.timer);
5866
5867         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
5868 }
5869
5870 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
5871                                    u8 reason, bool tx)
5872 {
5873         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5874
5875         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
5876                                tx, frame_buf);
5877
5878         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5879                                     reason, false);
5880 }
5881
5882 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
5883 {
5884         struct ieee80211_local *local = sdata->local;
5885         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5886         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
5887         u32 tx_flags = 0;
5888         u16 trans = 1;
5889         u16 status = 0;
5890         struct ieee80211_prep_tx_info info = {
5891                 .subtype = IEEE80211_STYPE_AUTH,
5892         };
5893
5894         sdata_assert_lock(sdata);
5895
5896         if (WARN_ON_ONCE(!auth_data))
5897                 return -EINVAL;
5898
5899         auth_data->tries++;
5900
5901         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
5902                 sdata_info(sdata, "authentication with %pM timed out\n",
5903                            auth_data->ap_addr);
5904
5905                 /*
5906                  * Most likely AP is not in the range so remove the
5907                  * bss struct for that AP.
5908                  */
5909                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
5910
5911                 return -ETIMEDOUT;
5912         }
5913
5914         if (auth_data->algorithm == WLAN_AUTH_SAE)
5915                 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
5916
5917         drv_mgd_prepare_tx(local, sdata, &info);
5918
5919         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
5920                    auth_data->ap_addr, auth_data->tries,
5921                    IEEE80211_AUTH_MAX_TRIES);
5922
5923         auth_data->expected_transaction = 2;
5924
5925         if (auth_data->algorithm == WLAN_AUTH_SAE) {
5926                 trans = auth_data->sae_trans;
5927                 status = auth_data->sae_status;
5928                 auth_data->expected_transaction = trans;
5929         }
5930
5931         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
5932                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
5933                            IEEE80211_TX_INTFL_MLME_CONN_TX;
5934
5935         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
5936                             auth_data->data, auth_data->data_len,
5937                             auth_data->ap_addr, auth_data->ap_addr,
5938                             NULL, 0, 0, tx_flags);
5939
5940         if (tx_flags == 0) {
5941                 if (auth_data->algorithm == WLAN_AUTH_SAE)
5942                         auth_data->timeout = jiffies +
5943                                 IEEE80211_AUTH_TIMEOUT_SAE;
5944                 else
5945                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
5946         } else {
5947                 auth_data->timeout =
5948                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
5949         }
5950
5951         auth_data->timeout_started = true;
5952         run_again(sdata, auth_data->timeout);
5953
5954         return 0;
5955 }
5956
5957 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
5958 {
5959         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
5960         struct ieee80211_local *local = sdata->local;
5961         int ret;
5962
5963         sdata_assert_lock(sdata);
5964
5965         assoc_data->tries++;
5966         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
5967                 sdata_info(sdata, "association with %pM timed out\n",
5968                            assoc_data->ap_addr);
5969
5970                 /*
5971                  * Most likely AP is not in the range so remove the
5972                  * bss struct for that AP.
5973                  */
5974                 cfg80211_unlink_bss(local->hw.wiphy,
5975                                     assoc_data->link[assoc_data->assoc_link_id].bss);
5976
5977                 return -ETIMEDOUT;
5978         }
5979
5980         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
5981                    assoc_data->ap_addr, assoc_data->tries,
5982                    IEEE80211_ASSOC_MAX_TRIES);
5983         ret = ieee80211_send_assoc(sdata);
5984         if (ret)
5985                 return ret;
5986
5987         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
5988                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
5989                 assoc_data->timeout_started = true;
5990                 run_again(sdata, assoc_data->timeout);
5991         } else {
5992                 assoc_data->timeout =
5993                         round_jiffies_up(jiffies +
5994                                          IEEE80211_ASSOC_TIMEOUT_LONG);
5995                 assoc_data->timeout_started = true;
5996                 run_again(sdata, assoc_data->timeout);
5997         }
5998
5999         return 0;
6000 }
6001
6002 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
6003                                   __le16 fc, bool acked)
6004 {
6005         struct ieee80211_local *local = sdata->local;
6006
6007         sdata->u.mgd.status_fc = fc;
6008         sdata->u.mgd.status_acked = acked;
6009         sdata->u.mgd.status_received = true;
6010
6011         ieee80211_queue_work(&local->hw, &sdata->work);
6012 }
6013
6014 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
6015 {
6016         struct ieee80211_local *local = sdata->local;
6017         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6018
6019         sdata_lock(sdata);
6020
6021         if (ifmgd->status_received) {
6022                 __le16 fc = ifmgd->status_fc;
6023                 bool status_acked = ifmgd->status_acked;
6024
6025                 ifmgd->status_received = false;
6026                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
6027                         if (status_acked) {
6028                                 if (ifmgd->auth_data->algorithm ==
6029                                     WLAN_AUTH_SAE)
6030                                         ifmgd->auth_data->timeout =
6031                                                 jiffies +
6032                                                 IEEE80211_AUTH_TIMEOUT_SAE;
6033                                 else
6034                                         ifmgd->auth_data->timeout =
6035                                                 jiffies +
6036                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
6037                                 run_again(sdata, ifmgd->auth_data->timeout);
6038                         } else {
6039                                 ifmgd->auth_data->timeout = jiffies - 1;
6040                         }
6041                         ifmgd->auth_data->timeout_started = true;
6042                 } else if (ifmgd->assoc_data &&
6043                            (ieee80211_is_assoc_req(fc) ||
6044                             ieee80211_is_reassoc_req(fc))) {
6045                         if (status_acked) {
6046                                 ifmgd->assoc_data->timeout =
6047                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
6048                                 run_again(sdata, ifmgd->assoc_data->timeout);
6049                         } else {
6050                                 ifmgd->assoc_data->timeout = jiffies - 1;
6051                         }
6052                         ifmgd->assoc_data->timeout_started = true;
6053                 }
6054         }
6055
6056         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
6057             time_after(jiffies, ifmgd->auth_data->timeout)) {
6058                 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
6059                         /*
6060                          * ok ... we waited for assoc or continuation but
6061                          * userspace didn't do it, so kill the auth data
6062                          */
6063                         ieee80211_destroy_auth_data(sdata, false);
6064                 } else if (ieee80211_auth(sdata)) {
6065                         u8 ap_addr[ETH_ALEN];
6066                         struct ieee80211_event event = {
6067                                 .type = MLME_EVENT,
6068                                 .u.mlme.data = AUTH_EVENT,
6069                                 .u.mlme.status = MLME_TIMEOUT,
6070                         };
6071
6072                         memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN);
6073
6074                         ieee80211_destroy_auth_data(sdata, false);
6075
6076                         cfg80211_auth_timeout(sdata->dev, ap_addr);
6077                         drv_event_callback(sdata->local, sdata, &event);
6078                 }
6079         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
6080                 run_again(sdata, ifmgd->auth_data->timeout);
6081
6082         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
6083             time_after(jiffies, ifmgd->assoc_data->timeout)) {
6084                 if ((ifmgd->assoc_data->need_beacon &&
6085                      !sdata->deflink.u.mgd.have_beacon) ||
6086                     ieee80211_do_assoc(sdata)) {
6087                         struct ieee80211_event event = {
6088                                 .type = MLME_EVENT,
6089                                 .u.mlme.data = ASSOC_EVENT,
6090                                 .u.mlme.status = MLME_TIMEOUT,
6091                         };
6092
6093                         ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
6094                         drv_event_callback(sdata->local, sdata, &event);
6095                 }
6096         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
6097                 run_again(sdata, ifmgd->assoc_data->timeout);
6098
6099         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
6100             ifmgd->associated) {
6101                 u8 *bssid = sdata->deflink.u.mgd.bssid;
6102                 int max_tries;
6103
6104                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6105                         max_tries = max_nullfunc_tries;
6106                 else
6107                         max_tries = max_probe_tries;
6108
6109                 /* ACK received for nullfunc probing frame */
6110                 if (!ifmgd->probe_send_count)
6111                         ieee80211_reset_ap_probe(sdata);
6112                 else if (ifmgd->nullfunc_failed) {
6113                         if (ifmgd->probe_send_count < max_tries) {
6114                                 mlme_dbg(sdata,
6115                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
6116                                          bssid, ifmgd->probe_send_count,
6117                                          max_tries);
6118                                 ieee80211_mgd_probe_ap_send(sdata);
6119                         } else {
6120                                 mlme_dbg(sdata,
6121                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
6122                                          bssid);
6123                                 ieee80211_sta_connection_lost(sdata,
6124                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
6125                                         false);
6126                         }
6127                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
6128                         run_again(sdata, ifmgd->probe_timeout);
6129                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6130                         mlme_dbg(sdata,
6131                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
6132                                  bssid, probe_wait_ms);
6133                         ieee80211_sta_connection_lost(sdata,
6134                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6135                 } else if (ifmgd->probe_send_count < max_tries) {
6136                         mlme_dbg(sdata,
6137                                  "No probe response from AP %pM after %dms, try %d/%i\n",
6138                                  bssid, probe_wait_ms,
6139                                  ifmgd->probe_send_count, max_tries);
6140                         ieee80211_mgd_probe_ap_send(sdata);
6141                 } else {
6142                         /*
6143                          * We actually lost the connection ... or did we?
6144                          * Let's make sure!
6145                          */
6146                         mlme_dbg(sdata,
6147                                  "No probe response from AP %pM after %dms, disconnecting.\n",
6148                                  bssid, probe_wait_ms);
6149
6150                         ieee80211_sta_connection_lost(sdata,
6151                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6152                 }
6153         }
6154
6155         sdata_unlock(sdata);
6156 }
6157
6158 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
6159 {
6160         struct ieee80211_sub_if_data *sdata =
6161                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
6162
6163         if (WARN_ON(sdata->vif.valid_links))
6164                 return;
6165
6166         if (sdata->vif.bss_conf.csa_active &&
6167             !sdata->deflink.u.mgd.csa_waiting_bcn)
6168                 return;
6169
6170         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
6171                 return;
6172
6173         sdata->u.mgd.connection_loss = false;
6174         ieee80211_queue_work(&sdata->local->hw,
6175                              &sdata->u.mgd.beacon_connection_loss_work);
6176 }
6177
6178 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
6179 {
6180         struct ieee80211_sub_if_data *sdata =
6181                 from_timer(sdata, t, u.mgd.conn_mon_timer);
6182         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6183         struct ieee80211_local *local = sdata->local;
6184         struct sta_info *sta;
6185         unsigned long timeout;
6186
6187         if (WARN_ON(sdata->vif.valid_links))
6188                 return;
6189
6190         if (sdata->vif.bss_conf.csa_active &&
6191             !sdata->deflink.u.mgd.csa_waiting_bcn)
6192                 return;
6193
6194         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
6195         if (!sta)
6196                 return;
6197
6198         timeout = sta->deflink.status_stats.last_ack;
6199         if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
6200                 timeout = sta->deflink.rx_stats.last_rx;
6201         timeout += IEEE80211_CONNECTION_IDLE_TIME;
6202
6203         /* If timeout is after now, then update timer to fire at
6204          * the later date, but do not actually probe at this time.
6205          */
6206         if (time_is_after_jiffies(timeout)) {
6207                 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
6208                 return;
6209         }
6210
6211         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
6212 }
6213
6214 static void ieee80211_sta_monitor_work(struct work_struct *work)
6215 {
6216         struct ieee80211_sub_if_data *sdata =
6217                 container_of(work, struct ieee80211_sub_if_data,
6218                              u.mgd.monitor_work);
6219
6220         ieee80211_mgd_probe_ap(sdata, false);
6221 }
6222
6223 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
6224 {
6225         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
6226                 __ieee80211_stop_poll(sdata);
6227
6228                 /* let's probe the connection once */
6229                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
6230                         ieee80211_queue_work(&sdata->local->hw,
6231                                              &sdata->u.mgd.monitor_work);
6232         }
6233 }
6234
6235 #ifdef CONFIG_PM
6236 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
6237 {
6238         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6239         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6240
6241         sdata_lock(sdata);
6242
6243         if (ifmgd->auth_data || ifmgd->assoc_data) {
6244                 const u8 *ap_addr = ifmgd->auth_data ?
6245                                 ifmgd->auth_data->ap_addr :
6246                                 ifmgd->assoc_data->ap_addr;
6247
6248                 /*
6249                  * If we are trying to authenticate / associate while suspending,
6250                  * cfg80211 won't know and won't actually abort those attempts,
6251                  * thus we need to do that ourselves.
6252                  */
6253                 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr,
6254                                                IEEE80211_STYPE_DEAUTH,
6255                                                WLAN_REASON_DEAUTH_LEAVING,
6256                                                false, frame_buf);
6257                 if (ifmgd->assoc_data)
6258                         ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
6259                 if (ifmgd->auth_data)
6260                         ieee80211_destroy_auth_data(sdata, false);
6261                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
6262                                       IEEE80211_DEAUTH_FRAME_LEN,
6263                                       false);
6264         }
6265
6266         /* This is a bit of a hack - we should find a better and more generic
6267          * solution to this. Normally when suspending, cfg80211 will in fact
6268          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
6269          * auth (not so important) or assoc (this is the problem) process.
6270          *
6271          * As a consequence, it can happen that we are in the process of both
6272          * associating and suspending, and receive an association response
6273          * after cfg80211 has checked if it needs to disconnect, but before
6274          * we actually set the flag to drop incoming frames. This will then
6275          * cause the workqueue flush to process the association response in
6276          * the suspend, resulting in a successful association just before it
6277          * tries to remove the interface from the driver, which now though
6278          * has a channel context assigned ... this results in issues.
6279          *
6280          * To work around this (for now) simply deauth here again if we're
6281          * now connected.
6282          */
6283         if (ifmgd->associated && !sdata->local->wowlan) {
6284                 u8 bssid[ETH_ALEN];
6285                 struct cfg80211_deauth_request req = {
6286                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
6287                         .bssid = bssid,
6288                 };
6289
6290                 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
6291                 ieee80211_mgd_deauth(sdata, &req);
6292         }
6293
6294         sdata_unlock(sdata);
6295 }
6296 #endif
6297
6298 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
6299 {
6300         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6301
6302         sdata_lock(sdata);
6303         if (!ifmgd->associated) {
6304                 sdata_unlock(sdata);
6305                 return;
6306         }
6307
6308         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
6309                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
6310                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
6311                 ieee80211_sta_connection_lost(sdata,
6312                                               WLAN_REASON_UNSPECIFIED,
6313                                               true);
6314                 sdata_unlock(sdata);
6315                 return;
6316         }
6317
6318         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
6319                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
6320                 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
6321                 ieee80211_sta_connection_lost(sdata,
6322                                               WLAN_REASON_UNSPECIFIED,
6323                                               true);
6324                 sdata_unlock(sdata);
6325                 return;
6326         }
6327
6328         sdata_unlock(sdata);
6329 }
6330
6331 static void ieee80211_request_smps_mgd_work(struct work_struct *work)
6332 {
6333         struct ieee80211_link_data *link =
6334                 container_of(work, struct ieee80211_link_data,
6335                              u.mgd.request_smps_work);
6336
6337         sdata_lock(link->sdata);
6338         __ieee80211_request_smps_mgd(link->sdata, link,
6339                                      link->u.mgd.driver_smps_mode);
6340         sdata_unlock(link->sdata);
6341 }
6342
6343 /* interface setup */
6344 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
6345 {
6346         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6347
6348         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
6349         INIT_WORK(&ifmgd->beacon_connection_loss_work,
6350                   ieee80211_beacon_connection_loss_work);
6351         INIT_WORK(&ifmgd->csa_connection_drop_work,
6352                   ieee80211_csa_connection_drop_work);
6353         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
6354                           ieee80211_tdls_peer_del_work);
6355         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
6356         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
6357         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
6358         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
6359                           ieee80211_sta_handle_tspec_ac_params_wk);
6360
6361         ifmgd->flags = 0;
6362         ifmgd->powersave = sdata->wdev.ps;
6363         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
6364         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
6365         /* Setup TDLS data */
6366         spin_lock_init(&ifmgd->teardown_lock);
6367         ifmgd->teardown_skb = NULL;
6368         ifmgd->orig_teardown_skb = NULL;
6369 }
6370
6371 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
6372 {
6373         struct ieee80211_sub_if_data *sdata = link->sdata;
6374         struct ieee80211_local *local = sdata->local;
6375         unsigned int link_id = link->link_id;
6376
6377         link->u.mgd.p2p_noa_index = -1;
6378         link->u.mgd.conn_flags = 0;
6379         link->conf->bssid = link->u.mgd.bssid;
6380
6381         INIT_WORK(&link->u.mgd.request_smps_work,
6382                   ieee80211_request_smps_mgd_work);
6383         if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
6384                 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
6385         else
6386                 link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
6387
6388         INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work);
6389         timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0);
6390
6391         if (sdata->u.mgd.assoc_data)
6392                 ether_addr_copy(link->conf->addr,
6393                                 sdata->u.mgd.assoc_data->link[link_id].addr);
6394         else if (!is_valid_ether_addr(link->conf->addr))
6395                 eth_random_addr(link->conf->addr);
6396 }
6397
6398 /* scan finished notification */
6399 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
6400 {
6401         struct ieee80211_sub_if_data *sdata;
6402
6403         /* Restart STA timers */
6404         rcu_read_lock();
6405         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
6406                 if (ieee80211_sdata_running(sdata))
6407                         ieee80211_restart_sta_timer(sdata);
6408         }
6409         rcu_read_unlock();
6410 }
6411
6412 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
6413                                      struct cfg80211_bss *cbss, s8 link_id,
6414                                      const u8 *ap_mld_addr, bool assoc,
6415                                      bool override)
6416 {
6417         struct ieee80211_local *local = sdata->local;
6418         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6419         struct ieee80211_bss *bss = (void *)cbss->priv;
6420         struct sta_info *new_sta = NULL;
6421         struct ieee80211_link_data *link;
6422         bool have_sta = false;
6423         bool mlo;
6424         int err;
6425
6426         if (link_id >= 0) {
6427                 mlo = true;
6428                 if (WARN_ON(!ap_mld_addr))
6429                         return -EINVAL;
6430                 err = ieee80211_vif_set_links(sdata, BIT(link_id));
6431         } else {
6432                 if (WARN_ON(ap_mld_addr))
6433                         return -EINVAL;
6434                 ap_mld_addr = cbss->bssid;
6435                 err = ieee80211_vif_set_links(sdata, 0);
6436                 link_id = 0;
6437                 mlo = false;
6438         }
6439
6440         if (err)
6441                 return err;
6442
6443         link = sdata_dereference(sdata->link[link_id], sdata);
6444         if (WARN_ON(!link)) {
6445                 err = -ENOLINK;
6446                 goto out_err;
6447         }
6448
6449         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
6450                 err = -EINVAL;
6451                 goto out_err;
6452         }
6453
6454         /* If a reconfig is happening, bail out */
6455         if (local->in_reconfig) {
6456                 err = -EBUSY;
6457                 goto out_err;
6458         }
6459
6460         if (assoc) {
6461                 rcu_read_lock();
6462                 have_sta = sta_info_get(sdata, ap_mld_addr);
6463                 rcu_read_unlock();
6464         }
6465
6466         if (!have_sta) {
6467                 if (mlo)
6468                         new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr,
6469                                                            link_id, cbss->bssid,
6470                                                            GFP_KERNEL);
6471                 else
6472                         new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL);
6473
6474                 if (!new_sta) {
6475                         err = -ENOMEM;
6476                         goto out_err;
6477                 }
6478
6479                 new_sta->sta.mlo = mlo;
6480         }
6481
6482         /*
6483          * Set up the information for the new channel before setting the
6484          * new channel. We can't - completely race-free - change the basic
6485          * rates bitmap and the channel (sband) that it refers to, but if
6486          * we set it up before we at least avoid calling into the driver's
6487          * bss_info_changed() method with invalid information (since we do
6488          * call that from changing the channel - only for IDLE and perhaps
6489          * some others, but ...).
6490          *
6491          * So to avoid that, just set up all the new information before the
6492          * channel, but tell the driver to apply it only afterwards, since
6493          * it might need the new channel for that.
6494          */
6495         if (new_sta) {
6496                 const struct cfg80211_bss_ies *ies;
6497                 struct link_sta_info *link_sta;
6498
6499                 rcu_read_lock();
6500                 link_sta = rcu_dereference(new_sta->link[link_id]);
6501                 if (WARN_ON(!link_sta)) {
6502                         rcu_read_unlock();
6503                         sta_info_free(local, new_sta);
6504                         err = -EINVAL;
6505                         goto out_err;
6506                 }
6507
6508                 err = ieee80211_mgd_setup_link_sta(link, new_sta,
6509                                                    link_sta, cbss);
6510                 if (err) {
6511                         rcu_read_unlock();
6512                         sta_info_free(local, new_sta);
6513                         goto out_err;
6514                 }
6515
6516                 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
6517
6518                 /* set timing information */
6519                 link->conf->beacon_int = cbss->beacon_interval;
6520                 ies = rcu_dereference(cbss->beacon_ies);
6521                 if (ies) {
6522                         link->conf->sync_tsf = ies->tsf;
6523                         link->conf->sync_device_ts =
6524                                 bss->device_ts_beacon;
6525
6526                         ieee80211_get_dtim(ies,
6527                                            &link->conf->sync_dtim_count,
6528                                            NULL);
6529                 } else if (!ieee80211_hw_check(&sdata->local->hw,
6530                                                TIMING_BEACON_ONLY)) {
6531                         ies = rcu_dereference(cbss->proberesp_ies);
6532                         /* must be non-NULL since beacon IEs were NULL */
6533                         link->conf->sync_tsf = ies->tsf;
6534                         link->conf->sync_device_ts =
6535                                 bss->device_ts_presp;
6536                         link->conf->sync_dtim_count = 0;
6537                 } else {
6538                         link->conf->sync_tsf = 0;
6539                         link->conf->sync_device_ts = 0;
6540                         link->conf->sync_dtim_count = 0;
6541                 }
6542                 rcu_read_unlock();
6543         }
6544
6545         if (new_sta || override) {
6546                 err = ieee80211_prep_channel(sdata, link, cbss,
6547                                              &link->u.mgd.conn_flags);
6548                 if (err) {
6549                         if (new_sta)
6550                                 sta_info_free(local, new_sta);
6551                         goto out_err;
6552                 }
6553         }
6554
6555         if (new_sta) {
6556                 /*
6557                  * tell driver about BSSID, basic rates and timing
6558                  * this was set up above, before setting the channel
6559                  */
6560                 ieee80211_link_info_change_notify(sdata, link,
6561                                                   BSS_CHANGED_BSSID |
6562                                                   BSS_CHANGED_BASIC_RATES |
6563                                                   BSS_CHANGED_BEACON_INT);
6564
6565                 if (assoc)
6566                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
6567
6568                 err = sta_info_insert(new_sta);
6569                 new_sta = NULL;
6570                 if (err) {
6571                         sdata_info(sdata,
6572                                    "failed to insert STA entry for the AP (error %d)\n",
6573                                    err);
6574                         goto out_err;
6575                 }
6576         } else
6577                 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
6578
6579         /* Cancel scan to ensure that nothing interferes with connection */
6580         if (local->scanning)
6581                 ieee80211_scan_cancel(local);
6582
6583         return 0;
6584
6585 out_err:
6586         ieee80211_link_release_channel(&sdata->deflink);
6587         ieee80211_vif_set_links(sdata, 0);
6588         return err;
6589 }
6590
6591 /* config hooks */
6592 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
6593                        struct cfg80211_auth_request *req)
6594 {
6595         struct ieee80211_local *local = sdata->local;
6596         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6597         struct ieee80211_mgd_auth_data *auth_data;
6598         u16 auth_alg;
6599         int err;
6600         bool cont_auth;
6601
6602         /* prepare auth data structure */
6603
6604         switch (req->auth_type) {
6605         case NL80211_AUTHTYPE_OPEN_SYSTEM:
6606                 auth_alg = WLAN_AUTH_OPEN;
6607                 break;
6608         case NL80211_AUTHTYPE_SHARED_KEY:
6609                 if (fips_enabled)
6610                         return -EOPNOTSUPP;
6611                 auth_alg = WLAN_AUTH_SHARED_KEY;
6612                 break;
6613         case NL80211_AUTHTYPE_FT:
6614                 auth_alg = WLAN_AUTH_FT;
6615                 break;
6616         case NL80211_AUTHTYPE_NETWORK_EAP:
6617                 auth_alg = WLAN_AUTH_LEAP;
6618                 break;
6619         case NL80211_AUTHTYPE_SAE:
6620                 auth_alg = WLAN_AUTH_SAE;
6621                 break;
6622         case NL80211_AUTHTYPE_FILS_SK:
6623                 auth_alg = WLAN_AUTH_FILS_SK;
6624                 break;
6625         case NL80211_AUTHTYPE_FILS_SK_PFS:
6626                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
6627                 break;
6628         case NL80211_AUTHTYPE_FILS_PK:
6629                 auth_alg = WLAN_AUTH_FILS_PK;
6630                 break;
6631         default:
6632                 return -EOPNOTSUPP;
6633         }
6634
6635         if (ifmgd->assoc_data)
6636                 return -EBUSY;
6637
6638         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
6639                             req->ie_len, GFP_KERNEL);
6640         if (!auth_data)
6641                 return -ENOMEM;
6642
6643         memcpy(auth_data->ap_addr,
6644                req->ap_mld_addr ?: req->bss->bssid,
6645                ETH_ALEN);
6646         auth_data->bss = req->bss;
6647         auth_data->link_id = req->link_id;
6648
6649         if (req->auth_data_len >= 4) {
6650                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
6651                         __le16 *pos = (__le16 *) req->auth_data;
6652
6653                         auth_data->sae_trans = le16_to_cpu(pos[0]);
6654                         auth_data->sae_status = le16_to_cpu(pos[1]);
6655                 }
6656                 memcpy(auth_data->data, req->auth_data + 4,
6657                        req->auth_data_len - 4);
6658                 auth_data->data_len += req->auth_data_len - 4;
6659         }
6660
6661         /* Check if continuing authentication or trying to authenticate with the
6662          * same BSS that we were in the process of authenticating with and avoid
6663          * removal and re-addition of the STA entry in
6664          * ieee80211_prep_connection().
6665          */
6666         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
6667                     ifmgd->auth_data->link_id == req->link_id;
6668
6669         if (req->ie && req->ie_len) {
6670                 memcpy(&auth_data->data[auth_data->data_len],
6671                        req->ie, req->ie_len);
6672                 auth_data->data_len += req->ie_len;
6673         }
6674
6675         if (req->key && req->key_len) {
6676                 auth_data->key_len = req->key_len;
6677                 auth_data->key_idx = req->key_idx;
6678                 memcpy(auth_data->key, req->key, req->key_len);
6679         }
6680
6681         auth_data->algorithm = auth_alg;
6682
6683         /* try to authenticate/probe */
6684
6685         if (ifmgd->auth_data) {
6686                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
6687                         auth_data->peer_confirmed =
6688                                 ifmgd->auth_data->peer_confirmed;
6689                 }
6690                 ieee80211_destroy_auth_data(sdata, cont_auth);
6691         }
6692
6693         /* prep auth_data so we don't go into idle on disassoc */
6694         ifmgd->auth_data = auth_data;
6695
6696         /* If this is continuation of an ongoing SAE authentication exchange
6697          * (i.e., request to send SAE Confirm) and the peer has already
6698          * confirmed, mark authentication completed since we are about to send
6699          * out SAE Confirm.
6700          */
6701         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
6702             auth_data->peer_confirmed && auth_data->sae_trans == 2)
6703                 ieee80211_mark_sta_auth(sdata);
6704
6705         if (ifmgd->associated) {
6706                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6707
6708                 sdata_info(sdata,
6709                            "disconnect from AP %pM for new auth to %pM\n",
6710                            sdata->vif.cfg.ap_addr, auth_data->ap_addr);
6711                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6712                                        WLAN_REASON_UNSPECIFIED,
6713                                        false, frame_buf);
6714
6715                 ieee80211_report_disconnect(sdata, frame_buf,
6716                                             sizeof(frame_buf), true,
6717                                             WLAN_REASON_UNSPECIFIED,
6718                                             false);
6719         }
6720
6721         sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr);
6722
6723         /* needed for transmitting the auth frame(s) properly */
6724         memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
6725
6726         err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
6727                                         req->ap_mld_addr, cont_auth, false);
6728         if (err)
6729                 goto err_clear;
6730
6731         err = ieee80211_auth(sdata);
6732         if (err) {
6733                 sta_info_destroy_addr(sdata, auth_data->ap_addr);
6734                 goto err_clear;
6735         }
6736
6737         /* hold our own reference */
6738         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
6739         return 0;
6740
6741  err_clear:
6742         if (!sdata->vif.valid_links) {
6743                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
6744                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
6745                                                   BSS_CHANGED_BSSID);
6746                 mutex_lock(&sdata->local->mtx);
6747                 ieee80211_link_release_channel(&sdata->deflink);
6748                 mutex_unlock(&sdata->local->mtx);
6749         }
6750         ifmgd->auth_data = NULL;
6751         kfree(auth_data);
6752         return err;
6753 }
6754
6755 static ieee80211_conn_flags_t
6756 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
6757                            struct ieee80211_mgd_assoc_data *assoc_data,
6758                            struct cfg80211_assoc_request *req,
6759                            ieee80211_conn_flags_t conn_flags,
6760                            unsigned int link_id)
6761 {
6762         struct ieee80211_local *local = sdata->local;
6763         const struct cfg80211_bss_ies *beacon_ies;
6764         struct ieee80211_supported_band *sband;
6765         const struct element *ht_elem, *vht_elem;
6766         struct ieee80211_link_data *link;
6767         struct cfg80211_bss *cbss;
6768         struct ieee80211_bss *bss;
6769         bool is_5ghz, is_6ghz;
6770
6771         cbss = assoc_data->link[link_id].bss;
6772         if (WARN_ON(!cbss))
6773                 return 0;
6774
6775         bss = (void *)cbss->priv;
6776
6777         sband = local->hw.wiphy->bands[cbss->channel->band];
6778         if (WARN_ON(!sband))
6779                 return 0;
6780
6781         link = sdata_dereference(sdata->link[link_id], sdata);
6782         if (WARN_ON(!link))
6783                 return 0;
6784
6785         is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
6786         is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
6787
6788         /* for MLO connections assume advertising all rates is OK */
6789         if (!req->ap_mld_addr) {
6790                 assoc_data->supp_rates = bss->supp_rates;
6791                 assoc_data->supp_rates_len = bss->supp_rates_len;
6792         }
6793
6794         /* copy and link elems for the STA profile */
6795         if (req->links[link_id].elems_len) {
6796                 memcpy(assoc_data->ie_pos, req->links[link_id].elems,
6797                        req->links[link_id].elems_len);
6798                 assoc_data->link[link_id].elems = assoc_data->ie_pos;
6799                 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
6800                 assoc_data->ie_pos += req->links[link_id].elems_len;
6801         }
6802
6803         rcu_read_lock();
6804         ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
6805         if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
6806                 assoc_data->link[link_id].ap_ht_param =
6807                         ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
6808         else if (!is_6ghz)
6809                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
6810         vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
6811         if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
6812                 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data,
6813                        sizeof(struct ieee80211_vht_cap));
6814         } else if (is_5ghz) {
6815                 link_info(link,
6816                           "VHT capa missing/short, disabling VHT/HE/EHT\n");
6817                 conn_flags |= IEEE80211_CONN_DISABLE_VHT |
6818                               IEEE80211_CONN_DISABLE_HE |
6819                               IEEE80211_CONN_DISABLE_EHT;
6820         }
6821         rcu_read_unlock();
6822
6823         link->u.mgd.beacon_crc_valid = false;
6824         link->u.mgd.dtim_period = 0;
6825         link->u.mgd.have_beacon = false;
6826
6827         /* override HT/VHT configuration only if the AP and we support it */
6828         if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) {
6829                 struct ieee80211_sta_ht_cap sta_ht_cap;
6830
6831                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
6832                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
6833         }
6834
6835         rcu_read_lock();
6836         beacon_ies = rcu_dereference(cbss->beacon_ies);
6837         if (beacon_ies) {
6838                 const struct element *elem;
6839                 u8 dtim_count = 0;
6840
6841                 ieee80211_get_dtim(beacon_ies, &dtim_count,
6842                                    &link->u.mgd.dtim_period);
6843
6844                 sdata->deflink.u.mgd.have_beacon = true;
6845
6846                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
6847                         link->conf->sync_tsf = beacon_ies->tsf;
6848                         link->conf->sync_device_ts = bss->device_ts_beacon;
6849                         link->conf->sync_dtim_count = dtim_count;
6850                 }
6851
6852                 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
6853                                               beacon_ies->data, beacon_ies->len);
6854                 if (elem && elem->datalen >= 3)
6855                         link->conf->profile_periodicity = elem->data[2];
6856                 else
6857                         link->conf->profile_periodicity = 0;
6858
6859                 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
6860                                           beacon_ies->data, beacon_ies->len);
6861                 if (elem && elem->datalen >= 11 &&
6862                     (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6863                         link->conf->ema_ap = true;
6864                 else
6865                         link->conf->ema_ap = false;
6866         }
6867         rcu_read_unlock();
6868
6869         if (bss->corrupt_data) {
6870                 char *corrupt_type = "data";
6871
6872                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
6873                         if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
6874                                 corrupt_type = "beacon and probe response";
6875                         else
6876                                 corrupt_type = "beacon";
6877                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
6878                         corrupt_type = "probe response";
6879                 }
6880                 sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
6881                            cbss->bssid, corrupt_type);
6882         }
6883
6884         if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
6885                 if (sdata->u.mgd.powersave)
6886                         link->smps_mode = IEEE80211_SMPS_DYNAMIC;
6887                 else
6888                         link->smps_mode = IEEE80211_SMPS_OFF;
6889         } else {
6890                 link->smps_mode = link->u.mgd.req_smps;
6891         }
6892
6893         return conn_flags;
6894 }
6895
6896 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
6897                         struct cfg80211_assoc_request *req)
6898 {
6899         unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id;
6900         struct ieee80211_local *local = sdata->local;
6901         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6902         struct ieee80211_mgd_assoc_data *assoc_data;
6903         const struct element *ssid_elem;
6904         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
6905         ieee80211_conn_flags_t conn_flags = 0;
6906         struct ieee80211_link_data *link;
6907         struct cfg80211_bss *cbss;
6908         struct ieee80211_bss *bss;
6909         bool override;
6910         int i, err;
6911         size_t size = sizeof(*assoc_data) + req->ie_len;
6912
6913         for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
6914                 size += req->links[i].elems_len;
6915
6916         /* FIXME: no support for 4-addr MLO yet */
6917         if (sdata->u.mgd.use_4addr && req->link_id >= 0)
6918                 return -EOPNOTSUPP;
6919
6920         assoc_data = kzalloc(size, GFP_KERNEL);
6921         if (!assoc_data)
6922                 return -ENOMEM;
6923
6924         cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss;
6925
6926         rcu_read_lock();
6927         ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
6928         if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
6929                 rcu_read_unlock();
6930                 kfree(assoc_data);
6931                 return -EINVAL;
6932         }
6933         memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
6934         assoc_data->ssid_len = ssid_elem->datalen;
6935         memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
6936         vif_cfg->ssid_len = assoc_data->ssid_len;
6937         rcu_read_unlock();
6938
6939         if (req->ap_mld_addr) {
6940                 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
6941                         if (!req->links[i].bss)
6942                                 continue;
6943                         link = sdata_dereference(sdata->link[i], sdata);
6944                         if (link)
6945                                 ether_addr_copy(assoc_data->link[i].addr,
6946                                                 link->conf->addr);
6947                         else
6948                                 eth_random_addr(assoc_data->link[i].addr);
6949                 }
6950         } else {
6951                 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
6952         }
6953
6954         assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
6955
6956         memcpy(assoc_data->ap_addr,
6957                req->ap_mld_addr ?: req->bss->bssid,
6958                ETH_ALEN);
6959
6960         if (ifmgd->associated) {
6961                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6962
6963                 sdata_info(sdata,
6964                            "disconnect from AP %pM for new assoc to %pM\n",
6965                            sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
6966                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6967                                        WLAN_REASON_UNSPECIFIED,
6968                                        false, frame_buf);
6969
6970                 ieee80211_report_disconnect(sdata, frame_buf,
6971                                             sizeof(frame_buf), true,
6972                                             WLAN_REASON_UNSPECIFIED,
6973                                             false);
6974         }
6975
6976         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
6977                 err = -EBUSY;
6978                 goto err_free;
6979         }
6980
6981         if (ifmgd->assoc_data) {
6982                 err = -EBUSY;
6983                 goto err_free;
6984         }
6985
6986         if (ifmgd->auth_data) {
6987                 bool match;
6988
6989                 /* keep sta info, bssid if matching */
6990                 match = ether_addr_equal(ifmgd->auth_data->ap_addr,
6991                                          assoc_data->ap_addr) &&
6992                         ifmgd->auth_data->link_id == req->link_id;
6993                 ieee80211_destroy_auth_data(sdata, match);
6994         }
6995
6996         /* prepare assoc data */
6997
6998         bss = (void *)cbss->priv;
6999         assoc_data->wmm = bss->wmm_used &&
7000                           (local->hw.queues >= IEEE80211_NUM_ACS);
7001
7002         /*
7003          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
7004          * We still associate in non-HT mode (11a/b/g) if any one of these
7005          * ciphers is configured as pairwise.
7006          * We can set this to true for non-11n hardware, that'll be checked
7007          * separately along with the peer capabilities.
7008          */
7009         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
7010                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
7011                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
7012                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
7013                         conn_flags |= IEEE80211_CONN_DISABLE_HT;
7014                         conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7015                         conn_flags |= IEEE80211_CONN_DISABLE_HE;
7016                         conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7017                         netdev_info(sdata->dev,
7018                                     "disabling HT/VHT/HE due to WEP/TKIP use\n");
7019                 }
7020         }
7021
7022         /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
7023         if (!bss->wmm_used) {
7024                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7025                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7026                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7027                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7028                 netdev_info(sdata->dev,
7029                             "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
7030         }
7031
7032         if (req->flags & ASSOC_REQ_DISABLE_HT) {
7033                 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
7034                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7035                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7036                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7037                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7038         }
7039
7040         if (req->flags & ASSOC_REQ_DISABLE_VHT) {
7041                 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
7042                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7043         }
7044
7045         if (req->flags & ASSOC_REQ_DISABLE_HE) {
7046                 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
7047                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7048                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7049         }
7050
7051         if (req->flags & ASSOC_REQ_DISABLE_EHT)
7052                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7053
7054         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
7055         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
7056                sizeof(ifmgd->ht_capa_mask));
7057
7058         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
7059         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
7060                sizeof(ifmgd->vht_capa_mask));
7061
7062         memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
7063         memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
7064                sizeof(ifmgd->s1g_capa_mask));
7065
7066         if (req->ie && req->ie_len) {
7067                 memcpy(assoc_data->ie, req->ie, req->ie_len);
7068                 assoc_data->ie_len = req->ie_len;
7069                 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
7070         } else {
7071                 assoc_data->ie_pos = assoc_data->ie;
7072         }
7073
7074         if (req->fils_kek) {
7075                 /* should already be checked in cfg80211 - so warn */
7076                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
7077                         err = -EINVAL;
7078                         goto err_free;
7079                 }
7080                 memcpy(assoc_data->fils_kek, req->fils_kek,
7081                        req->fils_kek_len);
7082                 assoc_data->fils_kek_len = req->fils_kek_len;
7083         }
7084
7085         if (req->fils_nonces)
7086                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
7087                        2 * FILS_NONCE_LEN);
7088
7089         /* default timeout */
7090         assoc_data->timeout = jiffies;
7091         assoc_data->timeout_started = true;
7092
7093         assoc_data->assoc_link_id = assoc_link_id;
7094
7095         if (req->ap_mld_addr) {
7096                 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7097                         assoc_data->link[i].conn_flags = conn_flags;
7098                         assoc_data->link[i].bss = req->links[i].bss;
7099                 }
7100
7101                 /* if there was no authentication, set up the link */
7102                 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id));
7103                 if (err)
7104                         goto err_clear;
7105         } else {
7106                 assoc_data->link[0].conn_flags = conn_flags;
7107                 assoc_data->link[0].bss = cbss;
7108         }
7109
7110         link = sdata_dereference(sdata->link[assoc_link_id], sdata);
7111         if (WARN_ON(!link)) {
7112                 err = -EINVAL;
7113                 goto err_clear;
7114         }
7115
7116         /* keep old conn_flags from ieee80211_prep_channel() from auth */
7117         conn_flags |= link->u.mgd.conn_flags;
7118         conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req,
7119                                                  conn_flags, assoc_link_id);
7120         override = link->u.mgd.conn_flags != conn_flags;
7121         link->u.mgd.conn_flags |= conn_flags;
7122
7123         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
7124                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
7125              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
7126                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
7127
7128         if (bss->wmm_used && bss->uapsd_supported &&
7129             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
7130                 assoc_data->uapsd = true;
7131                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
7132         } else {
7133                 assoc_data->uapsd = false;
7134                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
7135         }
7136
7137         if (req->prev_bssid)
7138                 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN);
7139
7140         if (req->use_mfp) {
7141                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
7142                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
7143         } else {
7144                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
7145                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
7146         }
7147
7148         if (req->flags & ASSOC_REQ_USE_RRM)
7149                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
7150         else
7151                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
7152
7153         if (req->crypto.control_port)
7154                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
7155         else
7156                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
7157
7158         sdata->control_port_protocol = req->crypto.control_port_ethertype;
7159         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
7160         sdata->control_port_over_nl80211 =
7161                                         req->crypto.control_port_over_nl80211;
7162         sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
7163
7164         /* kick off associate process */
7165         ifmgd->assoc_data = assoc_data;
7166
7167         for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7168                 if (!assoc_data->link[i].bss)
7169                         continue;
7170                 if (i == assoc_data->assoc_link_id)
7171                         continue;
7172                 /* only calculate the flags, hence link == NULL */
7173                 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss,
7174                                              &assoc_data->link[i].conn_flags);
7175                 if (err)
7176                         goto err_clear;
7177         }
7178
7179         /* needed for transmitting the assoc frames properly */
7180         memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN);
7181
7182         err = ieee80211_prep_connection(sdata, cbss, req->link_id,
7183                                         req->ap_mld_addr, true, override);
7184         if (err)
7185                 goto err_clear;
7186
7187         assoc_data->link[assoc_data->assoc_link_id].conn_flags =
7188                 link->u.mgd.conn_flags;
7189
7190         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
7191                 const struct cfg80211_bss_ies *beacon_ies;
7192
7193                 rcu_read_lock();
7194                 beacon_ies = rcu_dereference(req->bss->beacon_ies);
7195
7196                 if (beacon_ies) {
7197                         /*
7198                          * Wait up to one beacon interval ...
7199                          * should this be more if we miss one?
7200                          */
7201                         sdata_info(sdata, "waiting for beacon from %pM\n",
7202                                    link->u.mgd.bssid);
7203                         assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
7204                         assoc_data->timeout_started = true;
7205                         assoc_data->need_beacon = true;
7206                 }
7207                 rcu_read_unlock();
7208         }
7209
7210         run_again(sdata, assoc_data->timeout);
7211
7212         return 0;
7213  err_clear:
7214         eth_zero_addr(sdata->deflink.u.mgd.bssid);
7215         ieee80211_link_info_change_notify(sdata, &sdata->deflink,
7216                                           BSS_CHANGED_BSSID);
7217         ifmgd->assoc_data = NULL;
7218  err_free:
7219         kfree(assoc_data);
7220         return err;
7221 }
7222
7223 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
7224                          struct cfg80211_deauth_request *req)
7225 {
7226         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7227         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7228         bool tx = !req->local_state_change;
7229         struct ieee80211_prep_tx_info info = {
7230                 .subtype = IEEE80211_STYPE_DEAUTH,
7231         };
7232
7233         if (ifmgd->auth_data &&
7234             ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) {
7235                 sdata_info(sdata,
7236                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
7237                            req->bssid, req->reason_code,
7238                            ieee80211_get_reason_code_string(req->reason_code));
7239
7240                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7241                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7242                                                IEEE80211_STYPE_DEAUTH,
7243                                                req->reason_code, tx,
7244                                                frame_buf);
7245                 ieee80211_destroy_auth_data(sdata, false);
7246                 ieee80211_report_disconnect(sdata, frame_buf,
7247                                             sizeof(frame_buf), true,
7248                                             req->reason_code, false);
7249                 drv_mgd_complete_tx(sdata->local, sdata, &info);
7250                 return 0;
7251         }
7252
7253         if (ifmgd->assoc_data &&
7254             ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) {
7255                 sdata_info(sdata,
7256                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
7257                            req->bssid, req->reason_code,
7258                            ieee80211_get_reason_code_string(req->reason_code));
7259
7260                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7261                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7262                                                IEEE80211_STYPE_DEAUTH,
7263                                                req->reason_code, tx,
7264                                                frame_buf);
7265                 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
7266                 ieee80211_report_disconnect(sdata, frame_buf,
7267                                             sizeof(frame_buf), true,
7268                                             req->reason_code, false);
7269                 return 0;
7270         }
7271
7272         if (ifmgd->associated &&
7273             ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) {
7274                 sdata_info(sdata,
7275                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
7276                            req->bssid, req->reason_code,
7277                            ieee80211_get_reason_code_string(req->reason_code));
7278
7279                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7280                                        req->reason_code, tx, frame_buf);
7281                 ieee80211_report_disconnect(sdata, frame_buf,
7282                                             sizeof(frame_buf), true,
7283                                             req->reason_code, false);
7284                 drv_mgd_complete_tx(sdata->local, sdata, &info);
7285                 return 0;
7286         }
7287
7288         return -ENOTCONN;
7289 }
7290
7291 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
7292                            struct cfg80211_disassoc_request *req)
7293 {
7294         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7295
7296         if (!sdata->u.mgd.associated ||
7297             memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
7298                 return -ENOTCONN;
7299
7300         sdata_info(sdata,
7301                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
7302                    req->ap_addr, req->reason_code,
7303                    ieee80211_get_reason_code_string(req->reason_code));
7304
7305         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
7306                                req->reason_code, !req->local_state_change,
7307                                frame_buf);
7308
7309         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
7310                                     req->reason_code, false);
7311
7312         return 0;
7313 }
7314
7315 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
7316 {
7317         cancel_work_sync(&link->u.mgd.request_smps_work);
7318         cancel_work_sync(&link->u.mgd.chswitch_work);
7319 }
7320
7321 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
7322 {
7323         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7324
7325         /*
7326          * Make sure some work items will not run after this,
7327          * they will not do anything but might not have been
7328          * cancelled when disconnecting.
7329          */
7330         cancel_work_sync(&ifmgd->monitor_work);
7331         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
7332         cancel_work_sync(&ifmgd->csa_connection_drop_work);
7333         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
7334
7335         sdata_lock(sdata);
7336         if (ifmgd->assoc_data)
7337                 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
7338         if (ifmgd->auth_data)
7339                 ieee80211_destroy_auth_data(sdata, false);
7340         spin_lock_bh(&ifmgd->teardown_lock);
7341         if (ifmgd->teardown_skb) {
7342                 kfree_skb(ifmgd->teardown_skb);
7343                 ifmgd->teardown_skb = NULL;
7344                 ifmgd->orig_teardown_skb = NULL;
7345         }
7346         kfree(ifmgd->assoc_req_ies);
7347         ifmgd->assoc_req_ies = NULL;
7348         ifmgd->assoc_req_ies_len = 0;
7349         spin_unlock_bh(&ifmgd->teardown_lock);
7350         del_timer_sync(&ifmgd->timer);
7351         sdata_unlock(sdata);
7352 }
7353
7354 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
7355                                enum nl80211_cqm_rssi_threshold_event rssi_event,
7356                                s32 rssi_level,
7357                                gfp_t gfp)
7358 {
7359         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7360
7361         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
7362
7363         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
7364 }
7365 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
7366
7367 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
7368 {
7369         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7370
7371         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
7372
7373         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
7374 }
7375 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
7376
7377 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
7378                                             int rssi_min_thold,
7379                                             int rssi_max_thold)
7380 {
7381         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
7382
7383         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
7384                 return;
7385
7386         /*
7387          * Scale up threshold values before storing it, as the RSSI averaging
7388          * algorithm uses a scaled up value as well. Change this scaling
7389          * factor if the RSSI averaging algorithm changes.
7390          */
7391         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
7392         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
7393 }
7394
7395 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
7396                                     int rssi_min_thold,
7397                                     int rssi_max_thold)
7398 {
7399         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7400
7401         WARN_ON(rssi_min_thold == rssi_max_thold ||
7402                 rssi_min_thold > rssi_max_thold);
7403
7404         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
7405                                        rssi_max_thold);
7406 }
7407 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
7408
7409 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
7410 {
7411         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7412
7413         _ieee80211_enable_rssi_reports(sdata, 0, 0);
7414 }
7415 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);