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