net/mac80211/mlme.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * BSS client mode implementation
   4  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   5  * Copyright 2004, Instant802 Networks, Inc.
   6  * Copyright 2005, Devicescape Software, Inc.
   7  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   8  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   9  * Copyright 2013-2014  Intel Mobile Communications GmbH
  10  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  11  * Copyright (C) 2018 - 2022 Intel Corporation
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/fips.h>
  16 #include <linux/if_ether.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/moduleparam.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32 #include "fils_aead.h"
  33
  34 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  35 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  36 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  37 #define IEEE80211_AUTH_TIMEOUT_SAE      (HZ * 2)
  38 #define IEEE80211_AUTH_MAX_TRIES        3
  39 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  40 #define IEEE80211_AUTH_WAIT_SAE_RETRY   (HZ * 2)
  41 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  42 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  43 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  44 #define IEEE80211_ASSOC_MAX_TRIES       3
  45
  46 static int max_nullfunc_tries = 2;
  47 module_param(max_nullfunc_tries, int, 0644);
  48 MODULE_PARM_DESC(max_nullfunc_tries,
  49                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  50
  51 static int max_probe_tries = 5;
  52 module_param(max_probe_tries, int, 0644);
  53 MODULE_PARM_DESC(max_probe_tries,
  54                  "Maximum probe tries before disconnecting (reason 4).");
  55
  56 /*
  57  * Beacon loss timeout is calculated as N frames times the
  58  * advertised beacon interval.  This may need to be somewhat
  59  * higher than what hardware might detect to account for
  60  * delays in the host processing frames. But since we also
  61  * probe on beacon miss before declaring the connection lost
  62  * default to what we want.
  63  */
  64 static int beacon_loss_count = 7;
  65 module_param(beacon_loss_count, int, 0644);
  66 MODULE_PARM_DESC(beacon_loss_count,
  67                  "Number of beacon intervals before we decide beacon was lost.");
  68
  69 /*
  70  * Time the connection can be idle before we probe
  71  * it to see if we can still talk to the AP.
  72  */
  73 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  74 /*
  75  * Time we wait for a probe response after sending
  76  * a probe request because of beacon loss or for
  77  * checking the connection still works.
  78  */
  79 static int probe_wait_ms = 500;
  80 module_param(probe_wait_ms, int, 0644);
  81 MODULE_PARM_DESC(probe_wait_ms,
  82                  "Maximum time(ms) to wait for probe response"
  83                  " before disconnecting (reason 4).");
  84
  85 /*
  86  * How many Beacon frames need to have been used in average signal strength
  87  * before starting to indicate signal change events.
  88  */
  89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  90
  91 /*
  92  * We can have multiple work items (and connection probing)
  93  * scheduling this timer, but we need to take care to only
  94  * reschedule it when it should fire _earlier_ than it was
  95  * asked for before, or if it's not pending right now. This
  96  * function ensures that. Note that it then is required to
  97  * run this function for all timeouts after the first one
  98  * has happened -- the work that runs from this timer will
  99  * do that.
 100  */
 101 static void run_again(struct ieee80211_sub_if_data *sdata,
 102                       unsigned long timeout)
 103 {
 104         sdata_assert_lock(sdata);
 105
 106         if (!timer_pending(&sdata->u.mgd.timer) ||
 107             time_before(timeout, sdata->u.mgd.timer.expires))
 108                 mod_timer(&sdata->u.mgd.timer, timeout);
 109 }
 110
 111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 112 {
 113         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 114                 return;
 115
 116         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 117                 return;
 118
 119         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 120                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 121 }
 122
 123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 124 {
 125         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 126
 127         if (unlikely(!ifmgd->associated))
 128                 return;
 129
 130         if (ifmgd->probe_send_count)
 131                 ifmgd->probe_send_count = 0;
 132
 133         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
 134                 return;
 135
 136         mod_timer(&ifmgd->conn_mon_timer,
 137                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 138 }
 139
 140 static int ecw2cw(int ecw)
 141 {
 142         return (1 << ecw) - 1;
 143 }
 144
 145 static ieee80211_conn_flags_t
 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 147                              struct ieee80211_link_data *link,
 148                              ieee80211_conn_flags_t conn_flags,
 149                              struct ieee80211_supported_band *sband,
 150                              struct ieee80211_channel *channel,
 151                              u32 vht_cap_info,
 152                              const struct ieee80211_ht_operation *ht_oper,
 153                              const struct ieee80211_vht_operation *vht_oper,
 154                              const struct ieee80211_he_operation *he_oper,
 155                              const struct ieee80211_eht_operation *eht_oper,
 156                              const struct ieee80211_s1g_oper_ie *s1g_oper,
 157                              struct cfg80211_chan_def *chandef, bool tracking)
 158 {
 159         struct cfg80211_chan_def vht_chandef;
 160         struct ieee80211_sta_ht_cap sta_ht_cap;
 161         ieee80211_conn_flags_t ret;
 162         u32 ht_cfreq;
 163
 164         memset(chandef, 0, sizeof(struct cfg80211_chan_def));
 165         chandef->chan = channel;
 166         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 167         chandef->center_freq1 = channel->center_freq;
 168         chandef->freq1_offset = channel->freq_offset;
 169
 170         if (channel->band == NL80211_BAND_6GHZ) {
 171                 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
 172                                                     chandef)) {
 173                         mlme_dbg(sdata,
 174                                  "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
 175                         ret = IEEE80211_CONN_DISABLE_HT |
 176                               IEEE80211_CONN_DISABLE_VHT |
 177                               IEEE80211_CONN_DISABLE_HE |
 178                               IEEE80211_CONN_DISABLE_EHT;
 179                 } else {
 180                         ret = 0;
 181                 }
 182                 vht_chandef = *chandef;
 183                 goto out;
 184         } else if (sband->band == NL80211_BAND_S1GHZ) {
 185                 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
 186                         sdata_info(sdata,
 187                                    "Missing S1G Operation Element? Trying operating == primary\n");
 188                         chandef->width = ieee80211_s1g_channel_width(channel);
 189                 }
 190
 191                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ |
 192                       IEEE80211_CONN_DISABLE_VHT |
 193                       IEEE80211_CONN_DISABLE_80P80MHZ |
 194                       IEEE80211_CONN_DISABLE_160MHZ;
 195                 goto out;
 196         }
 197
 198         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
 199         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
 200
 201         if (!ht_oper || !sta_ht_cap.ht_supported) {
 202                 mlme_dbg(sdata, "HT operation missing / HT not supported\n");
 203                 ret = IEEE80211_CONN_DISABLE_HT |
 204                       IEEE80211_CONN_DISABLE_VHT |
 205                       IEEE80211_CONN_DISABLE_HE |
 206                       IEEE80211_CONN_DISABLE_EHT;
 207                 goto out;
 208         }
 209
 210         chandef->width = NL80211_CHAN_WIDTH_20;
 211
 212         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 213                                                   channel->band);
 214         /* check that channel matches the right operating channel */
 215         if (!tracking && channel->center_freq != ht_cfreq) {
 216                 /*
 217                  * It's possible that some APs are confused here;
 218                  * Netgear WNDR3700 sometimes reports 4 higher than
 219                  * the actual channel in association responses, but
 220                  * since we look at probe response/beacon data here
 221                  * it should be OK.
 222                  */
 223                 sdata_info(sdata,
 224                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 225                            channel->center_freq, ht_cfreq,
 226                            ht_oper->primary_chan, channel->band);
 227                 ret = IEEE80211_CONN_DISABLE_HT |
 228                       IEEE80211_CONN_DISABLE_VHT |
 229                       IEEE80211_CONN_DISABLE_HE |
 230                       IEEE80211_CONN_DISABLE_EHT;
 231                 goto out;
 232         }
 233
 234         /* check 40 MHz support, if we have it */
 235         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 236                 ieee80211_chandef_ht_oper(ht_oper, chandef);
 237         } else {
 238                 mlme_dbg(sdata, "40 MHz not supported\n");
 239                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 240                 ret = IEEE80211_CONN_DISABLE_VHT;
 241                 /* also mark 40 MHz disabled */
 242                 ret |= IEEE80211_CONN_DISABLE_40MHZ;
 243                 goto out;
 244         }
 245
 246         if (!vht_oper || !sband->vht_cap.vht_supported) {
 247                 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n");
 248                 ret = IEEE80211_CONN_DISABLE_VHT;
 249                 goto out;
 250         }
 251
 252         vht_chandef = *chandef;
 253         if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) &&
 254             he_oper &&
 255             (le32_to_cpu(he_oper->he_oper_params) &
 256              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
 257                 struct ieee80211_vht_operation he_oper_vht_cap;
 258
 259                 /*
 260                  * Set only first 3 bytes (other 2 aren't used in
 261                  * ieee80211_chandef_vht_oper() anyway)
 262                  */
 263                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
 264                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
 265
 266                 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
 267                                                 &he_oper_vht_cap, ht_oper,
 268                                                 &vht_chandef)) {
 269                         if (!(conn_flags & IEEE80211_CONN_DISABLE_HE))
 270                                 sdata_info(sdata,
 271                                            "HE AP VHT information is invalid, disabling HE\n");
 272                         ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
 273                         goto out;
 274                 }
 275         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
 276                                                vht_cap_info,
 277                                                vht_oper, ht_oper,
 278                                                &vht_chandef)) {
 279                 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
 280                         sdata_info(sdata,
 281                                    "AP VHT information is invalid, disabling VHT\n");
 282                 ret = IEEE80211_CONN_DISABLE_VHT;
 283                 goto out;
 284         }
 285
 286         if (!cfg80211_chandef_valid(&vht_chandef)) {
 287                 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
 288                         sdata_info(sdata,
 289                                    "AP VHT information is invalid, disabling VHT\n");
 290                 ret = IEEE80211_CONN_DISABLE_VHT;
 291                 goto out;
 292         }
 293
 294         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 295                 ret = 0;
 296                 goto out;
 297         }
 298
 299         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 300                 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
 301                         sdata_info(sdata,
 302                                    "AP VHT information doesn't match HT, disabling VHT\n");
 303                 ret = IEEE80211_CONN_DISABLE_VHT;
 304                 goto out;
 305         }
 306
 307         *chandef = vht_chandef;
 308
 309         /*
 310          * handle the case that the EHT operation indicates that it holds EHT
 311          * operation information (in case that the channel width differs from
 312          * the channel width reported in HT/VHT/HE).
 313          */
 314         if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
 315                 struct cfg80211_chan_def eht_chandef = *chandef;
 316
 317                 ieee80211_chandef_eht_oper(eht_oper,
 318                                            eht_chandef.width ==
 319                                            NL80211_CHAN_WIDTH_160,
 320                                            false, &eht_chandef);
 321
 322                 if (!cfg80211_chandef_valid(&eht_chandef)) {
 323                         if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
 324                                 sdata_info(sdata,
 325                                            "AP EHT information is invalid, disabling EHT\n");
 326                         ret = IEEE80211_CONN_DISABLE_EHT;
 327                         goto out;
 328                 }
 329
 330                 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) {
 331                         if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
 332                                 sdata_info(sdata,
 333                                            "AP EHT information is incompatible, disabling EHT\n");
 334                         ret = IEEE80211_CONN_DISABLE_EHT;
 335                         goto out;
 336                 }
 337
 338                 *chandef = eht_chandef;
 339         }
 340
 341         ret = 0;
 342
 343 out:
 344         /*
 345          * When tracking the current AP, don't do any further checks if the
 346          * new chandef is identical to the one we're currently using for the
 347          * connection. This keeps us from playing ping-pong with regulatory,
 348          * without it the following can happen (for example):
 349          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 350          *  - AP advertises regdom US
 351          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 352          *  - the code below detects an unsupported channel, downgrades, and
 353          *    we disconnect from the AP in the caller
 354          *  - disconnect causes CRDA to reload world regdomain and the game
 355          *    starts anew.
 356          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 357          *
 358          * It seems possible that there are still scenarios with CSA or real
 359          * bandwidth changes where a this could happen, but those cases are
 360          * less common and wouldn't completely prevent using the AP.
 361          */
 362         if (tracking &&
 363             cfg80211_chandef_identical(chandef, &link->conf->chandef))
 364                 return ret;
 365
 366         /* don't print the message below for VHT mismatch if VHT is disabled */
 367         if (ret & IEEE80211_CONN_DISABLE_VHT)
 368                 vht_chandef = *chandef;
 369
 370         /*
 371          * Ignore the DISABLED flag when we're already connected and only
 372          * tracking the APs beacon for bandwidth changes - otherwise we
 373          * might get disconnected here if we connect to an AP, update our
 374          * regulatory information based on the AP's country IE and the
 375          * information we have is wrong/outdated and disables the channel
 376          * that we're actually using for the connection to the AP.
 377          */
 378         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 379                                         tracking ? 0 :
 380                                                    IEEE80211_CHAN_DISABLED)) {
 381                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 382                         ret = IEEE80211_CONN_DISABLE_HT |
 383                               IEEE80211_CONN_DISABLE_VHT |
 384                               IEEE80211_CONN_DISABLE_HE |
 385                               IEEE80211_CONN_DISABLE_EHT;
 386                         break;
 387                 }
 388
 389                 ret |= ieee80211_chandef_downgrade(chandef);
 390         }
 391
 392         if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
 393                                                  IEEE80211_CHAN_NO_HE))
 394                 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
 395
 396         if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
 397                                                   IEEE80211_CHAN_NO_EHT))
 398                 ret |= IEEE80211_CONN_DISABLE_EHT;
 399
 400         if (chandef->width != vht_chandef.width && !tracking)
 401                 sdata_info(sdata,
 402                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 403
 404         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 405         return ret;
 406 }
 407
 408 static int ieee80211_config_bw(struct ieee80211_link_data *link,
 409                                const struct ieee80211_ht_cap *ht_cap,
 410                                const struct ieee80211_vht_cap *vht_cap,
 411                                const struct ieee80211_ht_operation *ht_oper,
 412                                const struct ieee80211_vht_operation *vht_oper,
 413                                const struct ieee80211_he_operation *he_oper,
 414                                const struct ieee80211_eht_operation *eht_oper,
 415                                const struct ieee80211_s1g_oper_ie *s1g_oper,
 416                                const u8 *bssid, u32 *changed)
 417 {
 418         struct ieee80211_sub_if_data *sdata = link->sdata;
 419         struct ieee80211_local *local = sdata->local;
 420         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 421         struct ieee80211_channel *chan = link->conf->chandef.chan;
 422         struct ieee80211_supported_band *sband =
 423                 local->hw.wiphy->bands[chan->band];
 424         struct cfg80211_chan_def chandef;
 425         u16 ht_opmode;
 426         ieee80211_conn_flags_t flags;
 427         u32 vht_cap_info = 0;
 428         int ret;
 429
 430         /* if HT was/is disabled, don't track any bandwidth changes */
 431         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper)
 432                 return 0;
 433
 434         /* don't check VHT if we associated as non-VHT station */
 435         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
 436                 vht_oper = NULL;
 437
 438         /* don't check HE if we associated as non-HE station */
 439         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE ||
 440             !ieee80211_get_he_iftype_cap(sband,
 441                                          ieee80211_vif_type_p2p(&sdata->vif))) {
 442                 he_oper = NULL;
 443                 eht_oper = NULL;
 444         }
 445
 446         /* don't check EHT if we associated as non-EHT station */
 447         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT ||
 448             !ieee80211_get_eht_iftype_cap(sband,
 449                                          ieee80211_vif_type_p2p(&sdata->vif)))
 450                 eht_oper = NULL;
 451
 452         /*
 453          * if bss configuration changed store the new one -
 454          * this may be applicable even if channel is identical
 455          */
 456         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 457         if (link->conf->ht_operation_mode != ht_opmode) {
 458                 *changed |= BSS_CHANGED_HT;
 459                 link->conf->ht_operation_mode = ht_opmode;
 460         }
 461
 462         if (vht_cap)
 463                 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
 464
 465         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
 466         flags = ieee80211_determine_chantype(sdata, link,
 467                                              link->u.mgd.conn_flags,
 468                                              sband, chan, vht_cap_info,
 469                                              ht_oper, vht_oper,
 470                                              he_oper, eht_oper,
 471                                              s1g_oper, &chandef, true);
 472
 473         /*
 474          * Downgrade the new channel if we associated with restricted
 475          * capabilities. For example, if we associated as a 20 MHz STA
 476          * to a 40 MHz AP (due to regulatory, capabilities or config
 477          * reasons) then switching to a 40 MHz channel now won't do us
 478          * any good -- we couldn't use it with the AP.
 479          */
 480         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
 481             chandef.width == NL80211_CHAN_WIDTH_80P80)
 482                 flags |= ieee80211_chandef_downgrade(&chandef);
 483         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
 484             chandef.width == NL80211_CHAN_WIDTH_160)
 485                 flags |= ieee80211_chandef_downgrade(&chandef);
 486         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ &&
 487             chandef.width > NL80211_CHAN_WIDTH_20)
 488                 flags |= ieee80211_chandef_downgrade(&chandef);
 489
 490         if (cfg80211_chandef_identical(&chandef, &link->conf->chandef))
 491                 return 0;
 492
 493         link_info(link,
 494                   "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
 495                   link->u.mgd.bssid, chandef.chan->center_freq,
 496                   chandef.chan->freq_offset, chandef.width,
 497                   chandef.center_freq1, chandef.freq1_offset,
 498                   chandef.center_freq2);
 499
 500         if (flags != (link->u.mgd.conn_flags &
 501                                 (IEEE80211_CONN_DISABLE_HT |
 502                                  IEEE80211_CONN_DISABLE_VHT |
 503                                  IEEE80211_CONN_DISABLE_HE |
 504                                  IEEE80211_CONN_DISABLE_EHT |
 505                                  IEEE80211_CONN_DISABLE_40MHZ |
 506                                  IEEE80211_CONN_DISABLE_80P80MHZ |
 507                                  IEEE80211_CONN_DISABLE_160MHZ |
 508                                  IEEE80211_CONN_DISABLE_320MHZ)) ||
 509             !cfg80211_chandef_valid(&chandef)) {
 510                 sdata_info(sdata,
 511                            "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
 512                            link->u.mgd.bssid, flags, ifmgd->flags);
 513                 return -EINVAL;
 514         }
 515
 516         ret = ieee80211_link_change_bandwidth(link, &chandef, changed);
 517
 518         if (ret) {
 519                 sdata_info(sdata,
 520                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 521                            link->u.mgd.bssid);
 522                 return ret;
 523         }
 524
 525         return 0;
 526 }
 527
 528 /* frame sending functions */
 529
 530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 531                                 struct sk_buff *skb, u8 ap_ht_param,
 532                                 struct ieee80211_supported_band *sband,
 533                                 struct ieee80211_channel *channel,
 534                                 enum ieee80211_smps_mode smps,
 535                                 ieee80211_conn_flags_t conn_flags)
 536 {
 537         u8 *pos;
 538         u32 flags = channel->flags;
 539         u16 cap;
 540         struct ieee80211_sta_ht_cap ht_cap;
 541
 542         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 543
 544         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 545         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 546
 547         /* determine capability flags */
 548         cap = ht_cap.cap;
 549
 550         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 551         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 552                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 553                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 554                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 555                 }
 556                 break;
 557         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 558                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 559                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 560                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 561                 }
 562                 break;
 563         }
 564
 565         /*
 566          * If 40 MHz was disabled associate as though we weren't
 567          * capable of 40 MHz -- some broken APs will never fall
 568          * back to trying to transmit in 20 MHz.
 569          */
 570         if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) {
 571                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 572                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 573         }
 574
 575         /* set SM PS mode properly */
 576         cap &= ~IEEE80211_HT_CAP_SM_PS;
 577         switch (smps) {
 578         case IEEE80211_SMPS_AUTOMATIC:
 579         case IEEE80211_SMPS_NUM_MODES:
 580                 WARN_ON(1);
 581                 fallthrough;
 582         case IEEE80211_SMPS_OFF:
 583                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 584                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 585                 break;
 586         case IEEE80211_SMPS_STATIC:
 587                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 588                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 589                 break;
 590         case IEEE80211_SMPS_DYNAMIC:
 591                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 592                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 593                 break;
 594         }
 595
 596         /* reserve and fill IE */
 597         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 598         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 599 }
 600
 601 /* This function determines vht capability flags for the association
 602  * and builds the IE.
 603  * Note - the function returns true to own the MU-MIMO capability
 604  */
 605 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 606                                  struct sk_buff *skb,
 607                                  struct ieee80211_supported_band *sband,
 608                                  struct ieee80211_vht_cap *ap_vht_cap,
 609                                  ieee80211_conn_flags_t conn_flags)
 610 {
 611         struct ieee80211_local *local = sdata->local;
 612         u8 *pos;
 613         u32 cap;
 614         struct ieee80211_sta_vht_cap vht_cap;
 615         u32 mask, ap_bf_sts, our_bf_sts;
 616         bool mu_mimo_owner = false;
 617
 618         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 619
 620         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 621         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 622
 623         /* determine capability flags */
 624         cap = vht_cap.cap;
 625
 626         if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) {
 627                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 628
 629                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 630                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 631                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 632                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 633         }
 634
 635         if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) {
 636                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 637                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 638         }
 639
 640         /*
 641          * Some APs apparently get confused if our capabilities are better
 642          * than theirs, so restrict what we advertise in the assoc request.
 643          */
 644         if (!(ap_vht_cap->vht_cap_info &
 645                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 646                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 647                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
 648         else if (!(ap_vht_cap->vht_cap_info &
 649                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
 650                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 651
 652         /*
 653          * If some other vif is using the MU-MIMO capability we cannot associate
 654          * using MU-MIMO - this will lead to contradictions in the group-id
 655          * mechanism.
 656          * Ownership is defined since association request, in order to avoid
 657          * simultaneous associations with MU-MIMO.
 658          */
 659         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
 660                 bool disable_mu_mimo = false;
 661                 struct ieee80211_sub_if_data *other;
 662
 663                 list_for_each_entry_rcu(other, &local->interfaces, list) {
 664                         if (other->vif.bss_conf.mu_mimo_owner) {
 665                                 disable_mu_mimo = true;
 666                                 break;
 667                         }
 668                 }
 669                 if (disable_mu_mimo)
 670                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
 671                 else
 672                         mu_mimo_owner = true;
 673         }
 674
 675         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 676
 677         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 678         our_bf_sts = cap & mask;
 679
 680         if (ap_bf_sts < our_bf_sts) {
 681                 cap &= ~mask;
 682                 cap |= ap_bf_sts;
 683         }
 684
 685         /* reserve and fill IE */
 686         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 687         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 688
 689         return mu_mimo_owner;
 690 }
 691
 692 /* This function determines HE capability flags for the association
 693  * and builds the IE.
 694  */
 695 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 696                                 struct sk_buff *skb,
 697                                 struct ieee80211_supported_band *sband,
 698                                 enum ieee80211_smps_mode smps_mode,
 699                                 ieee80211_conn_flags_t conn_flags)
 700 {
 701         u8 *pos, *pre_he_pos;
 702         const struct ieee80211_sta_he_cap *he_cap;
 703         u8 he_cap_size;
 704
 705         he_cap = ieee80211_get_he_iftype_cap(sband,
 706                                              ieee80211_vif_type_p2p(&sdata->vif));
 707         if (WARN_ON(!he_cap))
 708                 return;
 709
 710         /* get a max size estimate */
 711         he_cap_size =
 712                 2 + 1 + sizeof(he_cap->he_cap_elem) +
 713                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 714                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 715                                       he_cap->he_cap_elem.phy_cap_info);
 716         pos = skb_put(skb, he_cap_size);
 717         pre_he_pos = pos;
 718         pos = ieee80211_ie_build_he_cap(conn_flags,
 719                                         pos, he_cap, pos + he_cap_size);
 720         /* trim excess if any */
 721         skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
 722
 723         ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb);
 724 }
 725
 726 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
 727                                  struct sk_buff *skb,
 728                                  struct ieee80211_supported_band *sband)
 729 {
 730         u8 *pos;
 731         const struct ieee80211_sta_he_cap *he_cap;
 732         const struct ieee80211_sta_eht_cap *eht_cap;
 733         u8 eht_cap_size;
 734
 735         he_cap = ieee80211_get_he_iftype_cap(sband,
 736                                              ieee80211_vif_type_p2p(&sdata->vif));
 737         eht_cap = ieee80211_get_eht_iftype_cap(sband,
 738                                                ieee80211_vif_type_p2p(&sdata->vif));
 739
 740         /*
 741          * EHT capabilities element is only added if the HE capabilities element
 742          * was added so assume that 'he_cap' is valid and don't check it.
 743          */
 744         if (WARN_ON(!he_cap || !eht_cap))
 745                 return;
 746
 747         eht_cap_size =
 748                 2 + 1 + sizeof(eht_cap->eht_cap_elem) +
 749                 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
 750                                            &eht_cap->eht_cap_elem,
 751                                            false) +
 752                 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
 753                                        eht_cap->eht_cap_elem.phy_cap_info);
 754         pos = skb_put(skb, eht_cap_size);
 755         ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size,
 756                                    false);
 757 }
 758
 759 static void ieee80211_assoc_add_rates(struct sk_buff *skb,
 760                                       enum nl80211_chan_width width,
 761                                       struct ieee80211_supported_band *sband,
 762                                       struct ieee80211_mgd_assoc_data *assoc_data)
 763 {
 764         unsigned int shift = ieee80211_chanwidth_get_shift(width);
 765         unsigned int rates_len, supp_rates_len;
 766         u32 rates = 0;
 767         int i, count;
 768         u8 *pos;
 769
 770         if (assoc_data->supp_rates_len) {
 771                 /*
 772                  * Get all rates supported by the device and the AP as
 773                  * some APs don't like getting a superset of their rates
 774                  * in the association request (e.g. D-Link DAP 1353 in
 775                  * b-only mode)...
 776                  */
 777                 rates_len = ieee80211_parse_bitrates(width, sband,
 778                                                      assoc_data->supp_rates,
 779                                                      assoc_data->supp_rates_len,
 780                                                      &rates);
 781         } else {
 782                 /*
 783                  * In case AP not provide any supported rates information
 784                  * before association, we send information element(s) with
 785                  * all rates that we support.
 786                  */
 787                 rates_len = sband->n_bitrates;
 788                 for (i = 0; i < sband->n_bitrates; i++)
 789                         rates |= BIT(i);
 790         }
 791
 792         supp_rates_len = rates_len;
 793         if (supp_rates_len > 8)
 794                 supp_rates_len = 8;
 795
 796         pos = skb_put(skb, supp_rates_len + 2);
 797         *pos++ = WLAN_EID_SUPP_RATES;
 798         *pos++ = supp_rates_len;
 799
 800         count = 0;
 801         for (i = 0; i < sband->n_bitrates; i++) {
 802                 if (BIT(i) & rates) {
 803                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 804                                                 5 * (1 << shift));
 805                         *pos++ = (u8)rate;
 806                         if (++count == 8)
 807                                 break;
 808                 }
 809         }
 810
 811         if (rates_len > count) {
 812                 pos = skb_put(skb, rates_len - count + 2);
 813                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 814                 *pos++ = rates_len - count;
 815
 816                 for (i++; i < sband->n_bitrates; i++) {
 817                         if (BIT(i) & rates) {
 818                                 int rate;
 819
 820                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 821                                                     5 * (1 << shift));
 822                                 *pos++ = (u8)rate;
 823                         }
 824                 }
 825         }
 826 }
 827
 828 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb,
 829                                             const u8 *elems,
 830                                             size_t elems_len,
 831                                             size_t offset)
 832 {
 833         size_t noffset;
 834
 835         static const u8 before_ht[] = {
 836                 WLAN_EID_SSID,
 837                 WLAN_EID_SUPP_RATES,
 838                 WLAN_EID_EXT_SUPP_RATES,
 839                 WLAN_EID_PWR_CAPABILITY,
 840                 WLAN_EID_SUPPORTED_CHANNELS,
 841                 WLAN_EID_RSN,
 842                 WLAN_EID_QOS_CAPA,
 843                 WLAN_EID_RRM_ENABLED_CAPABILITIES,
 844                 WLAN_EID_MOBILITY_DOMAIN,
 845                 WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
 846                 WLAN_EID_RIC_DATA,              /* reassoc only */
 847                 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 848         };
 849         static const u8 after_ric[] = {
 850                 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 851                 WLAN_EID_HT_CAPABILITY,
 852                 WLAN_EID_BSS_COEX_2040,
 853                 /* luckily this is almost always there */
 854                 WLAN_EID_EXT_CAPABILITY,
 855                 WLAN_EID_QOS_TRAFFIC_CAPA,
 856                 WLAN_EID_TIM_BCAST_REQ,
 857                 WLAN_EID_INTERWORKING,
 858                 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 859                 WLAN_EID_VHT_CAPABILITY,
 860                 WLAN_EID_OPMODE_NOTIF,
 861         };
 862
 863         if (!elems_len)
 864                 return offset;
 865
 866         noffset = ieee80211_ie_split_ric(elems, elems_len,
 867                                          before_ht,
 868                                          ARRAY_SIZE(before_ht),
 869                                          after_ric,
 870                                          ARRAY_SIZE(after_ric),
 871                                          offset);
 872         skb_put_data(skb, elems + offset, noffset - offset);
 873
 874         return noffset;
 875 }
 876
 877 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb,
 878                                              const u8 *elems,
 879                                              size_t elems_len,
 880                                              size_t offset)
 881 {
 882         static const u8 before_vht[] = {
 883                 /*
 884                  * no need to list the ones split off before HT
 885                  * or generated here
 886                  */
 887                 WLAN_EID_BSS_COEX_2040,
 888                 WLAN_EID_EXT_CAPABILITY,
 889                 WLAN_EID_QOS_TRAFFIC_CAPA,
 890                 WLAN_EID_TIM_BCAST_REQ,
 891                 WLAN_EID_INTERWORKING,
 892                 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
 893         };
 894         size_t noffset;
 895
 896         if (!elems_len)
 897                 return offset;
 898
 899         /* RIC already taken care of in ieee80211_add_before_ht_elems() */
 900         noffset = ieee80211_ie_split(elems, elems_len,
 901                                      before_vht, ARRAY_SIZE(before_vht),
 902                                      offset);
 903         skb_put_data(skb, elems + offset, noffset - offset);
 904
 905         return noffset;
 906 }
 907
 908 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb,
 909                                             const u8 *elems,
 910                                             size_t elems_len,
 911                                             size_t offset)
 912 {
 913         static const u8 before_he[] = {
 914                 /*
 915                  * no need to list the ones split off before VHT
 916                  * or generated here
 917                  */
 918                 WLAN_EID_OPMODE_NOTIF,
 919                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
 920                 /* 11ai elements */
 921                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
 922                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
 923                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
 924                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
 925                 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
 926                 /* TODO: add 11ah/11aj/11ak elements */
 927         };
 928         size_t noffset;
 929
 930         if (!elems_len)
 931                 return offset;
 932
 933         /* RIC already taken care of in ieee80211_add_before_ht_elems() */
 934         noffset = ieee80211_ie_split(elems, elems_len,
 935                                      before_he, ARRAY_SIZE(before_he),
 936                                      offset);
 937         skb_put_data(skb, elems + offset, noffset - offset);
 938
 939         return noffset;
 940 }
 941
 942 #define PRESENT_ELEMS_MAX       8
 943 #define PRESENT_ELEM_EXT_OFFS   0x100
 944
 945 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
 946                                         struct sk_buff *skb, u16 capab,
 947                                         const struct element *ext_capa,
 948                                         const u16 *present_elems);
 949
 950 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata,
 951                                          struct sk_buff *skb, u16 *capab,
 952                                          const struct element *ext_capa,
 953                                          const u8 *extra_elems,
 954                                          size_t extra_elems_len,
 955                                          unsigned int link_id,
 956                                          struct ieee80211_link_data *link,
 957                                          u16 *present_elems)
 958 {
 959         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
 960         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 961         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 962         struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
 963         struct ieee80211_channel *chan = cbss->channel;
 964         const struct ieee80211_sband_iftype_data *iftd;
 965         struct ieee80211_local *local = sdata->local;
 966         struct ieee80211_supported_band *sband;
 967         enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20;
 968         struct ieee80211_chanctx_conf *chanctx_conf;
 969         enum ieee80211_smps_mode smps_mode;
 970         u16 orig_capab = *capab;
 971         size_t offset = 0;
 972         int present_elems_len = 0;
 973         u8 *pos;
 974         int i;
 975
 976 #define ADD_PRESENT_ELEM(id) do {                                       \
 977         /* need a last for termination - we use 0 == SSID */            \
 978         if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1))       \
 979                 present_elems[present_elems_len++] = (id);              \
 980 } while (0)
 981 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id))
 982
 983         if (link)
 984                 smps_mode = link->smps_mode;
 985         else if (sdata->u.mgd.powersave)
 986                 smps_mode = IEEE80211_SMPS_DYNAMIC;
 987         else
 988                 smps_mode = IEEE80211_SMPS_OFF;
 989
 990         if (link) {
 991                 /*
 992                  * 5/10 MHz scenarios are only viable without MLO, in which
 993                  * case this pointer should be used ... All of this is a bit
 994                  * unclear though, not sure this even works at all.
 995                  */
 996                 rcu_read_lock();
 997                 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
 998                 if (chanctx_conf)
 999                         width = chanctx_conf->def.width;
1000                 rcu_read_unlock();
1001         }
1002
1003         sband = local->hw.wiphy->bands[chan->band];
1004         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1005
1006         if (sband->band == NL80211_BAND_2GHZ) {
1007                 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
1008                 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
1009         }
1010
1011         if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
1012             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
1013                 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
1014
1015         if (sband->band != NL80211_BAND_S1GHZ)
1016                 ieee80211_assoc_add_rates(skb, width, sband, assoc_data);
1017
1018         if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
1019             *capab & WLAN_CAPABILITY_RADIO_MEASURE) {
1020                 struct cfg80211_chan_def chandef = {
1021                         .width = width,
1022                         .chan = chan,
1023                 };
1024
1025                 pos = skb_put(skb, 4);
1026                 *pos++ = WLAN_EID_PWR_CAPABILITY;
1027                 *pos++ = 2;
1028                 *pos++ = 0; /* min tx power */
1029                  /* max tx power */
1030                 *pos++ = ieee80211_chandef_max_power(&chandef);
1031                 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
1032         }
1033
1034         /*
1035          * Per spec, we shouldn't include the list of channels if we advertise
1036          * support for extended channel switching, but we've always done that;
1037          * (for now?) apply this restriction only on the (new) 6 GHz band.
1038          */
1039         if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
1040             (sband->band != NL80211_BAND_6GHZ ||
1041              !ext_capa || ext_capa->datalen < 1 ||
1042              !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
1043                 /* TODO: get this in reg domain format */
1044                 pos = skb_put(skb, 2 * sband->n_channels + 2);
1045                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
1046                 *pos++ = 2 * sband->n_channels;
1047                 for (i = 0; i < sband->n_channels; i++) {
1048                         int cf = sband->channels[i].center_freq;
1049
1050                         *pos++ = ieee80211_frequency_to_channel(cf);
1051                         *pos++ = 1; /* one channel in the subband*/
1052                 }
1053                 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
1054         }
1055
1056         /* if present, add any custom IEs that go before HT */
1057         offset = ieee80211_add_before_ht_elems(skb, extra_elems,
1058                                                extra_elems_len,
1059                                                offset);
1060
1061         if (sband->band != NL80211_BAND_6GHZ &&
1062             !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) {
1063                 ieee80211_add_ht_ie(sdata, skb,
1064                                     assoc_data->link[link_id].ap_ht_param,
1065                                     sband, chan, smps_mode,
1066                                     assoc_data->link[link_id].conn_flags);
1067                 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
1068         }
1069
1070         /* if present, add any custom IEs that go before VHT */
1071         offset = ieee80211_add_before_vht_elems(skb, extra_elems,
1072                                                 extra_elems_len,
1073                                                 offset);
1074
1075         if (sband->band != NL80211_BAND_6GHZ &&
1076             !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
1077                 bool mu_mimo_owner =
1078                         ieee80211_add_vht_ie(sdata, skb, sband,
1079                                              &assoc_data->link[link_id].ap_vht_cap,
1080                                              assoc_data->link[link_id].conn_flags);
1081
1082                 if (link)
1083                         link->conf->mu_mimo_owner = mu_mimo_owner;
1084                 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
1085         }
1086
1087         /*
1088          * If AP doesn't support HT, mark HE and EHT as disabled.
1089          * If on the 5GHz band, make sure it supports VHT.
1090          */
1091         if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT ||
1092             (sband->band == NL80211_BAND_5GHZ &&
1093              assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT))
1094                 assoc_data->link[link_id].conn_flags |=
1095                         IEEE80211_CONN_DISABLE_HE |
1096                         IEEE80211_CONN_DISABLE_EHT;
1097
1098         /* if present, add any custom IEs that go before HE */
1099         offset = ieee80211_add_before_he_elems(skb, extra_elems,
1100                                                extra_elems_len,
1101                                                offset);
1102
1103         if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) {
1104                 ieee80211_add_he_ie(sdata, skb, sband, smps_mode,
1105                                     assoc_data->link[link_id].conn_flags);
1106                 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
1107         }
1108
1109         /*
1110          * careful - need to know about all the present elems before
1111          * calling ieee80211_assoc_add_ml_elem(), so add this one if
1112          * we're going to put it after the ML element
1113          */
1114         if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1115                 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY);
1116
1117         if (link_id == assoc_data->assoc_link_id)
1118                 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa,
1119                                             present_elems);
1120
1121         /* crash if somebody gets it wrong */
1122         present_elems = NULL;
1123
1124         if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1125                 ieee80211_add_eht_ie(sdata, skb, sband);
1126
1127         if (sband->band == NL80211_BAND_S1GHZ) {
1128                 ieee80211_add_aid_request_ie(sdata, skb);
1129                 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1130         }
1131
1132         if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1133                 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
1134
1135         if (link)
1136                 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags;
1137
1138         return offset;
1139 }
1140
1141 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb,
1142                                                const u16 *outer,
1143                                                const u16 *inner)
1144 {
1145         unsigned int skb_len = skb->len;
1146         bool added = false;
1147         int i, j;
1148         u8 *len, *list_len = NULL;
1149
1150         skb_put_u8(skb, WLAN_EID_EXTENSION);
1151         len = skb_put(skb, 1);
1152         skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE);
1153
1154         for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
1155                 u16 elem = outer[i];
1156                 bool have_inner = false;
1157                 bool at_extension = false;
1158
1159                 /* should at least be sorted in the sense of normal -> ext */
1160                 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS);
1161
1162                 /* switch to extension list */
1163                 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) {
1164                         at_extension = true;
1165                         if (!list_len)
1166                                 skb_put_u8(skb, 0);
1167                         list_len = NULL;
1168                 }
1169
1170                 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) {
1171                         if (elem == inner[j]) {
1172                                 have_inner = true;
1173                                 break;
1174                         }
1175                 }
1176
1177                 if (have_inner)
1178                         continue;
1179
1180                 if (!list_len) {
1181                         list_len = skb_put(skb, 1);
1182                         *list_len = 0;
1183                 }
1184                 *list_len += 1;
1185                 skb_put_u8(skb, (u8)elem);
1186         }
1187
1188         if (!added)
1189                 skb_trim(skb, skb_len);
1190         else
1191                 *len = skb->len - skb_len - 2;
1192 }
1193
1194 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1195                                         struct sk_buff *skb, u16 capab,
1196                                         const struct element *ext_capa,
1197                                         const u16 *outer_present_elems)
1198 {
1199         struct ieee80211_local *local = sdata->local;
1200         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1201         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1202         struct ieee80211_multi_link_elem *ml_elem;
1203         struct ieee80211_mle_basic_common_info *common;
1204         const struct wiphy_iftype_ext_capab *ift_ext_capa;
1205         __le16 eml_capa = 0, mld_capa_ops = 0;
1206         unsigned int link_id;
1207         u8 *ml_elem_len;
1208         void *capab_pos;
1209
1210         if (!sdata->vif.valid_links)
1211                 return;
1212
1213         ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy,
1214                                                     ieee80211_vif_type_p2p(&sdata->vif));
1215         if (ift_ext_capa) {
1216                 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
1217                 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
1218         }
1219
1220         skb_put_u8(skb, WLAN_EID_EXTENSION);
1221         ml_elem_len = skb_put(skb, 1);
1222         skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
1223         ml_elem = skb_put(skb, sizeof(*ml_elem));
1224         ml_elem->control =
1225                 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
1226                             IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
1227         common = skb_put(skb, sizeof(*common));
1228         common->len = sizeof(*common) +
1229                       2;  /* MLD capa/ops */
1230         memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1231
1232         /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */
1233         if (eml_capa &
1234             cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP |
1235                          IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
1236                 common->len += 2; /* EML capabilities */
1237                 ml_elem->control |=
1238                         cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
1239                 skb_put_data(skb, &eml_capa, sizeof(eml_capa));
1240         }
1241         /* need indication from userspace to support this */
1242         mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP);
1243         skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops));
1244
1245         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1246                 u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
1247                 const u8 *extra_elems;
1248                 size_t extra_elems_len;
1249                 size_t extra_used;
1250                 u8 *subelem_len = NULL;
1251                 __le16 ctrl;
1252
1253                 if (!assoc_data->link[link_id].bss ||
1254                     link_id == assoc_data->assoc_link_id)
1255                         continue;
1256
1257                 extra_elems = assoc_data->link[link_id].elems;
1258                 extra_elems_len = assoc_data->link[link_id].elems_len;
1259
1260                 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
1261                 subelem_len = skb_put(skb, 1);
1262
1263                 ctrl = cpu_to_le16(link_id |
1264                                    IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
1265                                    IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
1266                 skb_put_data(skb, &ctrl, sizeof(ctrl));
1267                 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */
1268                 skb_put_data(skb, assoc_data->link[link_id].addr,
1269                              ETH_ALEN);
1270                 /*
1271                  * Now add the contents of the (re)association request,
1272                  * but the "listen interval" and "current AP address"
1273                  * (if applicable) are skipped. So we only have
1274                  * the capability field (remember the position and fill
1275                  * later), followed by the elements added below by
1276                  * calling ieee80211_assoc_link_elems().
1277                  */
1278                 capab_pos = skb_put(skb, 2);
1279
1280                 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab,
1281                                                         ext_capa,
1282                                                         extra_elems,
1283                                                         extra_elems_len,
1284                                                         link_id, NULL,
1285                                                         link_present_elems);
1286                 if (extra_elems)
1287                         skb_put_data(skb, extra_elems + extra_used,
1288                                      extra_elems_len - extra_used);
1289
1290                 put_unaligned_le16(capab, capab_pos);
1291
1292                 ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
1293                                                    link_present_elems);
1294
1295                 ieee80211_fragment_element(skb, subelem_len);
1296         }
1297
1298         ieee80211_fragment_element(skb, ml_elem_len);
1299 }
1300
1301 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
1302 {
1303         struct ieee80211_local *local = sdata->local;
1304         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1305         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1306         struct ieee80211_link_data *link;
1307         struct sk_buff *skb;
1308         struct ieee80211_mgmt *mgmt;
1309         u8 *pos, qos_info, *ie_start;
1310         size_t offset, noffset;
1311         u16 capab = WLAN_CAPABILITY_ESS, link_capab;
1312         __le16 listen_int;
1313         struct element *ext_capa = NULL;
1314         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1315         struct ieee80211_prep_tx_info info = {};
1316         unsigned int link_id, n_links = 0;
1317         u16 present_elems[PRESENT_ELEMS_MAX] = {};
1318         void *capab_pos;
1319         size_t size;
1320         int ret;
1321
1322         /* we know it's writable, cast away the const */
1323         if (assoc_data->ie_len)
1324                 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
1325                                                       assoc_data->ie,
1326                                                       assoc_data->ie_len);
1327
1328         sdata_assert_lock(sdata);
1329
1330         size = local->hw.extra_tx_headroom +
1331                sizeof(*mgmt) + /* bit too much but doesn't matter */
1332                2 + assoc_data->ssid_len + /* SSID */
1333                assoc_data->ie_len + /* extra IEs */
1334                (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
1335                9; /* WMM */
1336
1337         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1338                 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1339                 const struct ieee80211_sband_iftype_data *iftd;
1340                 struct ieee80211_supported_band *sband;
1341
1342                 if (!cbss)
1343                         continue;
1344
1345                 sband = local->hw.wiphy->bands[cbss->channel->band];
1346
1347                 n_links++;
1348                 /* add STA profile elements length */
1349                 size += assoc_data->link[link_id].elems_len;
1350                 /* and supported rates length */
1351                 size += 4 + sband->n_bitrates;
1352                 /* supported channels */
1353                 size += 2 + 2 * sband->n_channels;
1354
1355                 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1356                 if (iftd)
1357                         size += iftd->vendor_elems.len;
1358
1359                 /* power capability */
1360                 size += 4;
1361
1362                 /* HT, VHT, HE, EHT */
1363                 size += 2 + sizeof(struct ieee80211_ht_cap);
1364                 size += 2 + sizeof(struct ieee80211_vht_cap);
1365                 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
1366                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1367                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1368
1369                 if (sband->band == NL80211_BAND_6GHZ)
1370                         size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa);
1371
1372                 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
1373                         sizeof(struct ieee80211_eht_mcs_nss_supp) +
1374                         IEEE80211_EHT_PPE_THRES_MAX_LEN;
1375
1376                 /* non-inheritance element */
1377                 size += 2 + 2 + PRESENT_ELEMS_MAX;
1378
1379                 /* should be the same across all BSSes */
1380                 if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
1381                         capab |= WLAN_CAPABILITY_PRIVACY;
1382         }
1383
1384         if (sdata->vif.valid_links) {
1385                 /* consider the multi-link element with STA profile */
1386                 size += sizeof(struct ieee80211_multi_link_elem);
1387                 /* max common info field in basic multi-link element */
1388                 size += sizeof(struct ieee80211_mle_basic_common_info) +
1389                         2 + /* capa & op */
1390                         2; /* EML capa */
1391
1392                 /*
1393                  * The capability elements were already considered above;
1394                  * note this over-estimates a bit because there's no
1395                  * STA profile for the assoc link.
1396                  */
1397                 size += (n_links - 1) *
1398                         (1 + 1 + /* subelement ID/length */
1399                          2 + /* STA control */
1400                          1 + ETH_ALEN + 2 /* STA Info field */);
1401         }
1402
1403         link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
1404         if (WARN_ON(!link))
1405                 return -EINVAL;
1406
1407         if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
1408                 return -EINVAL;
1409
1410         skb = alloc_skb(size, GFP_KERNEL);
1411         if (!skb)
1412                 return -ENOMEM;
1413
1414         skb_reserve(skb, local->hw.extra_tx_headroom);
1415
1416         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
1417                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
1418
1419         /* Set MBSSID support for HE AP if needed */
1420         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
1421             !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
1422             ext_capa && ext_capa->datalen >= 3)
1423                 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1424
1425         mgmt = skb_put_zero(skb, 24);
1426         memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
1427         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1428         memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
1429
1430         listen_int = cpu_to_le16(assoc_data->s1g ?
1431                         ieee80211_encode_usf(local->hw.conf.listen_interval) :
1432                         local->hw.conf.listen_interval);
1433         if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) {
1434                 skb_put(skb, 10);
1435                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1436                                                   IEEE80211_STYPE_REASSOC_REQ);
1437                 capab_pos = &mgmt->u.reassoc_req.capab_info;
1438                 mgmt->u.reassoc_req.listen_interval = listen_int;
1439                 memcpy(mgmt->u.reassoc_req.current_ap,
1440                        assoc_data->prev_ap_addr, ETH_ALEN);
1441                 info.subtype = IEEE80211_STYPE_REASSOC_REQ;
1442         } else {
1443                 skb_put(skb, 4);
1444                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1445                                                   IEEE80211_STYPE_ASSOC_REQ);
1446                 capab_pos = &mgmt->u.assoc_req.capab_info;
1447                 mgmt->u.assoc_req.listen_interval = listen_int;
1448                 info.subtype = IEEE80211_STYPE_ASSOC_REQ;
1449         }
1450
1451         /* SSID */
1452         pos = skb_put(skb, 2 + assoc_data->ssid_len);
1453         ie_start = pos;
1454         *pos++ = WLAN_EID_SSID;
1455         *pos++ = assoc_data->ssid_len;
1456         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
1457
1458         /* add the elements for the assoc (main) link */
1459         link_capab = capab;
1460         offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
1461                                             ext_capa,
1462                                             assoc_data->ie,
1463                                             assoc_data->ie_len,
1464                                             assoc_data->assoc_link_id, link,
1465                                             present_elems);
1466         put_unaligned_le16(link_capab, capab_pos);
1467
1468         /* if present, add any custom non-vendor IEs */
1469         if (assoc_data->ie_len) {
1470                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1471                                                     assoc_data->ie_len,
1472                                                     offset);
1473                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1474                 offset = noffset;
1475         }
1476
1477         if (assoc_data->wmm) {
1478                 if (assoc_data->uapsd) {
1479                         qos_info = ifmgd->uapsd_queues;
1480                         qos_info |= (ifmgd->uapsd_max_sp_len <<
1481                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1482                 } else {
1483                         qos_info = 0;
1484                 }
1485
1486                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1487         }
1488
1489         /* add any remaining custom (i.e. vendor specific here) IEs */
1490         if (assoc_data->ie_len) {
1491                 noffset = assoc_data->ie_len;
1492                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1493         }
1494
1495         if (assoc_data->fils_kek_len) {
1496                 ret = fils_encrypt_assoc_req(skb, assoc_data);
1497                 if (ret < 0) {
1498                         dev_kfree_skb(skb);
1499                         return ret;
1500                 }
1501         }
1502
1503         pos = skb_tail_pointer(skb);
1504         kfree(ifmgd->assoc_req_ies);
1505         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1506         if (!ifmgd->assoc_req_ies) {
1507                 dev_kfree_skb(skb);
1508                 return -ENOMEM;
1509         }
1510
1511         ifmgd->assoc_req_ies_len = pos - ie_start;
1512
1513         drv_mgd_prepare_tx(local, sdata, &info);
1514
1515         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1516         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1517                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1518                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
1519         ieee80211_tx_skb(sdata, skb);
1520
1521         return 0;
1522 }
1523
1524 void ieee80211_send_pspoll(struct ieee80211_local *local,
1525                            struct ieee80211_sub_if_data *sdata)
1526 {
1527         struct ieee80211_pspoll *pspoll;
1528         struct sk_buff *skb;
1529
1530         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1531         if (!skb)
1532                 return;
1533
1534         pspoll = (struct ieee80211_pspoll *) skb->data;
1535         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1536
1537         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1538         ieee80211_tx_skb(sdata, skb);
1539 }
1540
1541 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1542                              struct ieee80211_sub_if_data *sdata,
1543                              bool powersave)
1544 {
1545         struct sk_buff *skb;
1546         struct ieee80211_hdr_3addr *nullfunc;
1547         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1548
1549         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1,
1550                                      !ieee80211_hw_check(&local->hw,
1551                                                          DOESNT_SUPPORT_QOS_NDP));
1552         if (!skb)
1553                 return;
1554
1555         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1556         if (powersave)
1557                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1558
1559         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1560                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1561
1562         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1563                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1564
1565         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1566                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1567
1568         ieee80211_tx_skb(sdata, skb);
1569 }
1570
1571 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1572                                    struct ieee80211_sub_if_data *sdata)
1573 {
1574         struct sk_buff *skb;
1575         struct ieee80211_hdr *nullfunc;
1576         __le16 fc;
1577
1578         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1579                 return;
1580
1581         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1582         if (!skb)
1583                 return;
1584
1585         skb_reserve(skb, local->hw.extra_tx_headroom);
1586
1587         nullfunc = skb_put_zero(skb, 30);
1588         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1589                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1590         nullfunc->frame_control = fc;
1591         memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1592         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1593         memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1594         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1595
1596         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1597         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1598         ieee80211_tx_skb(sdata, skb);
1599 }
1600
1601 /* spectrum management related things */
1602 static void ieee80211_chswitch_work(struct work_struct *work)
1603 {
1604         struct ieee80211_link_data *link =
1605                 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work);
1606         struct ieee80211_sub_if_data *sdata = link->sdata;
1607         struct ieee80211_local *local = sdata->local;
1608         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1609         int ret;
1610
1611         if (!ieee80211_sdata_running(sdata))
1612                 return;
1613
1614         sdata_lock(sdata);
1615         mutex_lock(&local->mtx);
1616         mutex_lock(&local->chanctx_mtx);
1617
1618         if (!ifmgd->associated)
1619                 goto out;
1620
1621         if (!link->conf->csa_active)
1622                 goto out;
1623
1624         /*
1625          * using reservation isn't immediate as it may be deferred until later
1626          * with multi-vif. once reservation is complete it will re-schedule the
1627          * work with no reserved_chanctx so verify chandef to check if it
1628          * completed successfully
1629          */
1630
1631         if (link->reserved_chanctx) {
1632                 /*
1633                  * with multi-vif csa driver may call ieee80211_csa_finish()
1634                  * many times while waiting for other interfaces to use their
1635                  * reservations
1636                  */
1637                 if (link->reserved_ready)
1638                         goto out;
1639
1640                 ret = ieee80211_link_use_reserved_context(link);
1641                 if (ret) {
1642                         sdata_info(sdata,
1643                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1644                                    ret);
1645                         ieee80211_queue_work(&sdata->local->hw,
1646                                              &ifmgd->csa_connection_drop_work);
1647                         goto out;
1648                 }
1649
1650                 goto out;
1651         }
1652
1653         if (!cfg80211_chandef_identical(&link->conf->chandef,
1654                                         &link->csa_chandef)) {
1655                 sdata_info(sdata,
1656                            "failed to finalize channel switch, disconnecting\n");
1657                 ieee80211_queue_work(&sdata->local->hw,
1658                                      &ifmgd->csa_connection_drop_work);
1659                 goto out;
1660         }
1661
1662         link->u.mgd.csa_waiting_bcn = true;
1663
1664         ieee80211_sta_reset_beacon_monitor(sdata);
1665         ieee80211_sta_reset_conn_monitor(sdata);
1666
1667 out:
1668         mutex_unlock(&local->chanctx_mtx);
1669         mutex_unlock(&local->mtx);
1670         sdata_unlock(sdata);
1671 }
1672
1673 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
1674 {
1675         struct ieee80211_sub_if_data *sdata = link->sdata;
1676         struct ieee80211_local *local = sdata->local;
1677         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1678         int ret;
1679
1680         sdata_assert_lock(sdata);
1681
1682         WARN_ON(!link->conf->csa_active);
1683
1684         if (link->csa_block_tx) {
1685                 ieee80211_wake_vif_queues(local, sdata,
1686                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1687                 link->csa_block_tx = false;
1688         }
1689
1690         link->conf->csa_active = false;
1691         link->u.mgd.csa_waiting_bcn = false;
1692         /*
1693          * If the CSA IE is still present on the beacon after the switch,
1694          * we need to consider it as a new CSA (possibly to self).
1695          */
1696         link->u.mgd.beacon_crc_valid = false;
1697
1698         ret = drv_post_channel_switch(sdata);
1699         if (ret) {
1700                 sdata_info(sdata,
1701                            "driver post channel switch failed, disconnecting\n");
1702                 ieee80211_queue_work(&local->hw,
1703                                      &ifmgd->csa_connection_drop_work);
1704                 return;
1705         }
1706
1707         cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0);
1708 }
1709
1710 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1711 {
1712         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1713         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1714
1715         if (WARN_ON(sdata->vif.valid_links))
1716                 success = false;
1717
1718         trace_api_chswitch_done(sdata, success);
1719         if (!success) {
1720                 sdata_info(sdata,
1721                            "driver channel switch failed, disconnecting\n");
1722                 ieee80211_queue_work(&sdata->local->hw,
1723                                      &ifmgd->csa_connection_drop_work);
1724         } else {
1725                 ieee80211_queue_work(&sdata->local->hw,
1726                                      &sdata->deflink.u.mgd.chswitch_work);
1727         }
1728 }
1729 EXPORT_SYMBOL(ieee80211_chswitch_done);
1730
1731 static void ieee80211_chswitch_timer(struct timer_list *t)
1732 {
1733         struct ieee80211_link_data *link =
1734                 from_timer(link, t, u.mgd.chswitch_timer);
1735
1736         ieee80211_queue_work(&link->sdata->local->hw,
1737                              &link->u.mgd.chswitch_work);
1738 }
1739
1740 static void
1741 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
1742 {
1743         struct ieee80211_sub_if_data *sdata = link->sdata;
1744         struct ieee80211_local *local = sdata->local;
1745
1746         if (!local->ops->abort_channel_switch)
1747                 return;
1748
1749         mutex_lock(&local->mtx);
1750
1751         mutex_lock(&local->chanctx_mtx);
1752         ieee80211_link_unreserve_chanctx(link);
1753         mutex_unlock(&local->chanctx_mtx);
1754
1755         if (link->csa_block_tx)
1756                 ieee80211_wake_vif_queues(local, sdata,
1757                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1758
1759         link->csa_block_tx = false;
1760         link->conf->csa_active = false;
1761
1762         mutex_unlock(&local->mtx);
1763
1764         drv_abort_channel_switch(sdata);
1765 }
1766
1767 static void
1768 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
1769                                  u64 timestamp, u32 device_timestamp,
1770                                  struct ieee802_11_elems *elems,
1771                                  bool beacon)
1772 {
1773         struct ieee80211_sub_if_data *sdata = link->sdata;
1774         struct ieee80211_local *local = sdata->local;
1775         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1776         struct cfg80211_bss *cbss = link->u.mgd.bss;
1777         struct ieee80211_chanctx_conf *conf;
1778         struct ieee80211_chanctx *chanctx;
1779         enum nl80211_band current_band;
1780         struct ieee80211_csa_ie csa_ie;
1781         struct ieee80211_channel_switch ch_switch;
1782         struct ieee80211_bss *bss;
1783         int res;
1784
1785         sdata_assert_lock(sdata);
1786
1787         if (!cbss)
1788                 return;
1789
1790         if (local->scanning)
1791                 return;
1792
1793         current_band = cbss->channel->band;
1794         bss = (void *)cbss->priv;
1795         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1796                                            bss->vht_cap_info,
1797                                            link->u.mgd.conn_flags,
1798                                            link->u.mgd.bssid, &csa_ie);
1799
1800         if (!res) {
1801                 ch_switch.timestamp = timestamp;
1802                 ch_switch.device_timestamp = device_timestamp;
1803                 ch_switch.block_tx = csa_ie.mode;
1804                 ch_switch.chandef = csa_ie.chandef;
1805                 ch_switch.count = csa_ie.count;
1806                 ch_switch.delay = csa_ie.max_switch_time;
1807         }
1808
1809         if (res < 0)
1810                 goto lock_and_drop_connection;
1811
1812         if (beacon && link->conf->csa_active &&
1813             !link->u.mgd.csa_waiting_bcn) {
1814                 if (res)
1815                         ieee80211_sta_abort_chanswitch(link);
1816                 else
1817                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1818                 return;
1819         } else if (link->conf->csa_active || res) {
1820                 /* disregard subsequent announcements if already processing */
1821                 return;
1822         }
1823
1824         if (link->conf->chandef.chan->band !=
1825             csa_ie.chandef.chan->band) {
1826                 sdata_info(sdata,
1827                            "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1828                            link->u.mgd.bssid,
1829                            csa_ie.chandef.chan->center_freq,
1830                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1831                            csa_ie.chandef.center_freq2);
1832                 goto lock_and_drop_connection;
1833         }
1834
1835         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1836                                      IEEE80211_CHAN_DISABLED)) {
1837                 sdata_info(sdata,
1838                            "AP %pM switches to unsupported channel "
1839                            "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1840                            "disconnecting\n",
1841                            link->u.mgd.bssid,
1842                            csa_ie.chandef.chan->center_freq,
1843                            csa_ie.chandef.chan->freq_offset,
1844                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1845                            csa_ie.chandef.freq1_offset,
1846                            csa_ie.chandef.center_freq2);
1847                 goto lock_and_drop_connection;
1848         }
1849
1850         if (cfg80211_chandef_identical(&csa_ie.chandef,
1851                                        &link->conf->chandef) &&
1852             (!csa_ie.mode || !beacon)) {
1853                 if (link->u.mgd.csa_ignored_same_chan)
1854                         return;
1855                 sdata_info(sdata,
1856                            "AP %pM tries to chanswitch to same channel, ignore\n",
1857                            link->u.mgd.bssid);
1858                 link->u.mgd.csa_ignored_same_chan = true;
1859                 return;
1860         }
1861
1862         /*
1863          * Drop all TDLS peers - either we disconnect or move to a different
1864          * channel from this point on. There's no telling what our peer will do.
1865          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1866          * have an incompatible wider chandef.
1867          */
1868         ieee80211_teardown_tdls_peers(sdata);
1869
1870         mutex_lock(&local->mtx);
1871         mutex_lock(&local->chanctx_mtx);
1872         conf = rcu_dereference_protected(link->conf->chanctx_conf,
1873                                          lockdep_is_held(&local->chanctx_mtx));
1874         if (!conf) {
1875                 sdata_info(sdata,
1876                            "no channel context assigned to vif?, disconnecting\n");
1877                 goto drop_connection;
1878         }
1879
1880         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1881
1882         if (local->use_chanctx &&
1883             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1884                 sdata_info(sdata,
1885                            "driver doesn't support chan-switch with channel contexts\n");
1886                 goto drop_connection;
1887         }
1888
1889         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1890                 sdata_info(sdata,
1891                            "preparing for channel switch failed, disconnecting\n");
1892                 goto drop_connection;
1893         }
1894
1895         res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef,
1896                                              chanctx->mode, false);
1897         if (res) {
1898                 sdata_info(sdata,
1899                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1900                            res);
1901                 goto drop_connection;
1902         }
1903         mutex_unlock(&local->chanctx_mtx);
1904
1905         link->conf->csa_active = true;
1906         link->csa_chandef = csa_ie.chandef;
1907         link->csa_block_tx = csa_ie.mode;
1908         link->u.mgd.csa_ignored_same_chan = false;
1909         link->u.mgd.beacon_crc_valid = false;
1910
1911         if (link->csa_block_tx)
1912                 ieee80211_stop_vif_queues(local, sdata,
1913                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1914         mutex_unlock(&local->mtx);
1915
1916         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0,
1917                                           csa_ie.count, csa_ie.mode);
1918
1919         if (local->ops->channel_switch) {
1920                 /* use driver's channel switch callback */
1921                 drv_channel_switch(local, sdata, &ch_switch);
1922                 return;
1923         }
1924
1925         /* channel switch handled in software */
1926         if (csa_ie.count <= 1)
1927                 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work);
1928         else
1929                 mod_timer(&link->u.mgd.chswitch_timer,
1930                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1931                                          cbss->beacon_interval));
1932         return;
1933  lock_and_drop_connection:
1934         mutex_lock(&local->mtx);
1935         mutex_lock(&local->chanctx_mtx);
1936  drop_connection:
1937         /*
1938          * This is just so that the disconnect flow will know that
1939          * we were trying to switch channel and failed. In case the
1940          * mode is 1 (we are not allowed to Tx), we will know not to
1941          * send a deauthentication frame. Those two fields will be
1942          * reset when the disconnection worker runs.
1943          */
1944         link->conf->csa_active = true;
1945         link->csa_block_tx = csa_ie.mode;
1946
1947         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1948         mutex_unlock(&local->chanctx_mtx);
1949         mutex_unlock(&local->mtx);
1950 }
1951
1952 static bool
1953 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1954                                  struct ieee80211_channel *channel,
1955                                  const u8 *country_ie, u8 country_ie_len,
1956                                  const u8 *pwr_constr_elem,
1957                                  int *chan_pwr, int *pwr_reduction)
1958 {
1959         struct ieee80211_country_ie_triplet *triplet;
1960         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1961         int i, chan_increment;
1962         bool have_chan_pwr = false;
1963
1964         /* Invalid IE */
1965         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1966                 return false;
1967
1968         triplet = (void *)(country_ie + 3);
1969         country_ie_len -= 3;
1970
1971         switch (channel->band) {
1972         default:
1973                 WARN_ON_ONCE(1);
1974                 fallthrough;
1975         case NL80211_BAND_2GHZ:
1976         case NL80211_BAND_60GHZ:
1977         case NL80211_BAND_LC:
1978                 chan_increment = 1;
1979                 break;
1980         case NL80211_BAND_5GHZ:
1981                 chan_increment = 4;
1982                 break;
1983         case NL80211_BAND_6GHZ:
1984                 /*
1985                  * In the 6 GHz band, the "maximum transmit power level"
1986                  * field in the triplets is reserved, and thus will be
1987                  * zero and we shouldn't use it to control TX power.
1988                  * The actual TX power will be given in the transmit
1989                  * power envelope element instead.
1990                  */
1991                 return false;
1992         }
1993
1994         /* find channel */
1995         while (country_ie_len >= 3) {
1996                 u8 first_channel = triplet->chans.first_channel;
1997
1998                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1999                         goto next;
2000
2001                 for (i = 0; i < triplet->chans.num_channels; i++) {
2002                         if (first_channel + i * chan_increment == chan) {
2003                                 have_chan_pwr = true;
2004                                 *chan_pwr = triplet->chans.max_power;
2005                                 break;
2006                         }
2007                 }
2008                 if (have_chan_pwr)
2009                         break;
2010
2011  next:
2012                 triplet++;
2013                 country_ie_len -= 3;
2014         }
2015
2016         if (have_chan_pwr && pwr_constr_elem)
2017                 *pwr_reduction = *pwr_constr_elem;
2018         else
2019                 *pwr_reduction = 0;
2020
2021         return have_chan_pwr;
2022 }
2023
2024 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
2025                                       struct ieee80211_channel *channel,
2026                                       const u8 *cisco_dtpc_ie,
2027                                       int *pwr_level)
2028 {
2029         /* From practical testing, the first data byte of the DTPC element
2030          * seems to contain the requested dBm level, and the CLI on Cisco
2031          * APs clearly state the range is -127 to 127 dBm, which indicates
2032          * a signed byte, although it seemingly never actually goes negative.
2033          * The other byte seems to always be zero.
2034          */
2035         *pwr_level = (__s8)cisco_dtpc_ie[4];
2036 }
2037
2038 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
2039                                        struct ieee80211_channel *channel,
2040                                        struct ieee80211_mgmt *mgmt,
2041                                        const u8 *country_ie, u8 country_ie_len,
2042                                        const u8 *pwr_constr_ie,
2043                                        const u8 *cisco_dtpc_ie)
2044 {
2045         struct ieee80211_sub_if_data *sdata = link->sdata;
2046         bool has_80211h_pwr = false, has_cisco_pwr = false;
2047         int chan_pwr = 0, pwr_reduction_80211h = 0;
2048         int pwr_level_cisco, pwr_level_80211h;
2049         int new_ap_level;
2050         __le16 capab = mgmt->u.probe_resp.capab_info;
2051
2052         if (ieee80211_is_s1g_beacon(mgmt->frame_control))
2053                 return 0;       /* TODO */
2054
2055         if (country_ie &&
2056             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
2057              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
2058                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
2059                         sdata, channel, country_ie, country_ie_len,
2060                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
2061                 pwr_level_80211h =
2062                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
2063         }
2064
2065         if (cisco_dtpc_ie) {
2066                 ieee80211_find_cisco_dtpc(
2067                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
2068                 has_cisco_pwr = true;
2069         }
2070
2071         if (!has_80211h_pwr && !has_cisco_pwr)
2072                 return 0;
2073
2074         /* If we have both 802.11h and Cisco DTPC, apply both limits
2075          * by picking the smallest of the two power levels advertised.
2076          */
2077         if (has_80211h_pwr &&
2078             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
2079                 new_ap_level = pwr_level_80211h;
2080
2081                 if (link->ap_power_level == new_ap_level)
2082                         return 0;
2083
2084                 sdata_dbg(sdata,
2085                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
2086                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
2087                           link->u.mgd.bssid);
2088         } else {  /* has_cisco_pwr is always true here. */
2089                 new_ap_level = pwr_level_cisco;
2090
2091                 if (link->ap_power_level == new_ap_level)
2092                         return 0;
2093
2094                 sdata_dbg(sdata,
2095                           "Limiting TX power to %d dBm as advertised by %pM\n",
2096                           pwr_level_cisco, link->u.mgd.bssid);
2097         }
2098
2099         link->ap_power_level = new_ap_level;
2100         if (__ieee80211_recalc_txpower(sdata))
2101                 return BSS_CHANGED_TXPOWER;
2102         return 0;
2103 }
2104
2105 /* powersave */
2106 static void ieee80211_enable_ps(struct ieee80211_local *local,
2107                                 struct ieee80211_sub_if_data *sdata)
2108 {
2109         struct ieee80211_conf *conf = &local->hw.conf;
2110
2111         /*
2112          * If we are scanning right now then the parameters will
2113          * take effect when scan finishes.
2114          */
2115         if (local->scanning)
2116                 return;
2117
2118         if (conf->dynamic_ps_timeout > 0 &&
2119             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2120                 mod_timer(&local->dynamic_ps_timer, jiffies +
2121                           msecs_to_jiffies(conf->dynamic_ps_timeout));
2122         } else {
2123                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
2124                         ieee80211_send_nullfunc(local, sdata, true);
2125
2126                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2127                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2128                         return;
2129
2130                 conf->flags |= IEEE80211_CONF_PS;
2131                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2132         }
2133 }
2134
2135 static void ieee80211_change_ps(struct ieee80211_local *local)
2136 {
2137         struct ieee80211_conf *conf = &local->hw.conf;
2138
2139         if (local->ps_sdata) {
2140                 ieee80211_enable_ps(local, local->ps_sdata);
2141         } else if (conf->flags & IEEE80211_CONF_PS) {
2142                 conf->flags &= ~IEEE80211_CONF_PS;
2143                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2144                 del_timer_sync(&local->dynamic_ps_timer);
2145                 cancel_work_sync(&local->dynamic_ps_enable_work);
2146         }
2147 }
2148
2149 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
2150 {
2151         struct ieee80211_local *local = sdata->local;
2152         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
2153         struct sta_info *sta = NULL;
2154         bool authorized = false;
2155
2156         if (!mgd->powersave)
2157                 return false;
2158
2159         if (mgd->broken_ap)
2160                 return false;
2161
2162         if (!mgd->associated)
2163                 return false;
2164
2165         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
2166                 return false;
2167
2168         if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
2169             !sdata->deflink.u.mgd.have_beacon)
2170                 return false;
2171
2172         rcu_read_lock();
2173         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
2174         if (sta)
2175                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2176         rcu_read_unlock();
2177
2178         return authorized;
2179 }
2180
2181 /* need to hold RTNL or interface lock */
2182 void ieee80211_recalc_ps(struct ieee80211_local *local)
2183 {
2184         struct ieee80211_sub_if_data *sdata, *found = NULL;
2185         int count = 0;
2186         int timeout;
2187
2188         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) ||
2189             ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2190                 local->ps_sdata = NULL;
2191                 return;
2192         }
2193
2194         list_for_each_entry(sdata, &local->interfaces, list) {
2195                 if (!ieee80211_sdata_running(sdata))
2196                         continue;
2197                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2198                         /* If an AP vif is found, then disable PS
2199                          * by setting the count to zero thereby setting
2200                          * ps_sdata to NULL.
2201                          */
2202                         count = 0;
2203                         break;
2204                 }
2205                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2206                         continue;
2207                 found = sdata;
2208                 count++;
2209         }
2210
2211         if (count == 1 && ieee80211_powersave_allowed(found)) {
2212                 u8 dtimper = found->deflink.u.mgd.dtim_period;
2213
2214                 timeout = local->dynamic_ps_forced_timeout;
2215                 if (timeout < 0)
2216                         timeout = 100;
2217                 local->hw.conf.dynamic_ps_timeout = timeout;
2218
2219                 /* If the TIM IE is invalid, pretend the value is 1 */
2220                 if (!dtimper)
2221                         dtimper = 1;
2222
2223                 local->hw.conf.ps_dtim_period = dtimper;
2224                 local->ps_sdata = found;
2225         } else {
2226                 local->ps_sdata = NULL;
2227         }
2228
2229         ieee80211_change_ps(local);
2230 }
2231
2232 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
2233 {
2234         bool ps_allowed = ieee80211_powersave_allowed(sdata);
2235
2236         if (sdata->vif.cfg.ps != ps_allowed) {
2237                 sdata->vif.cfg.ps = ps_allowed;
2238                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS);
2239         }
2240 }
2241
2242 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2243 {
2244         struct ieee80211_local *local =
2245                 container_of(work, struct ieee80211_local,
2246                              dynamic_ps_disable_work);
2247
2248         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2249                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2250                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2251         }
2252
2253         ieee80211_wake_queues_by_reason(&local->hw,
2254                                         IEEE80211_MAX_QUEUE_MAP,
2255                                         IEEE80211_QUEUE_STOP_REASON_PS,
2256                                         false);
2257 }
2258
2259 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2260 {
2261         struct ieee80211_local *local =
2262                 container_of(work, struct ieee80211_local,
2263                              dynamic_ps_enable_work);
2264         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
2265         struct ieee80211_if_managed *ifmgd;
2266         unsigned long flags;
2267         int q;
2268
2269         /* can only happen when PS was just disabled anyway */
2270         if (!sdata)
2271                 return;
2272
2273         ifmgd = &sdata->u.mgd;
2274
2275         if (local->hw.conf.flags & IEEE80211_CONF_PS)
2276                 return;
2277
2278         if (local->hw.conf.dynamic_ps_timeout > 0) {
2279                 /* don't enter PS if TX frames are pending */
2280                 if (drv_tx_frames_pending(local)) {
2281                         mod_timer(&local->dynamic_ps_timer, jiffies +
2282                                   msecs_to_jiffies(
2283                                   local->hw.conf.dynamic_ps_timeout));
2284                         return;
2285                 }
2286
2287                 /*
2288                  * transmission can be stopped by others which leads to
2289                  * dynamic_ps_timer expiry. Postpone the ps timer if it
2290                  * is not the actual idle state.
2291                  */
2292                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2293                 for (q = 0; q < local->hw.queues; q++) {
2294                         if (local->queue_stop_reasons[q]) {
2295                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2296                                                        flags);
2297                                 mod_timer(&local->dynamic_ps_timer, jiffies +
2298                                           msecs_to_jiffies(
2299                                           local->hw.conf.dynamic_ps_timeout));
2300                                 return;
2301                         }
2302                 }
2303                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2304         }
2305
2306         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2307             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2308                 if (drv_tx_frames_pending(local)) {
2309                         mod_timer(&local->dynamic_ps_timer, jiffies +
2310                                   msecs_to_jiffies(
2311                                   local->hw.conf.dynamic_ps_timeout));
2312                 } else {
2313                         ieee80211_send_nullfunc(local, sdata, true);
2314                         /* Flush to get the tx status of nullfunc frame */
2315                         ieee80211_flush_queues(local, sdata, false);
2316                 }
2317         }
2318
2319         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
2320               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
2321             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2322                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2323                 local->hw.conf.flags |= IEEE80211_CONF_PS;
2324                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2325         }
2326 }
2327
2328 void ieee80211_dynamic_ps_timer(struct timer_list *t)
2329 {
2330         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
2331
2332         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
2333 }
2334
2335 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
2336 {
2337         struct delayed_work *delayed_work = to_delayed_work(work);
2338         struct ieee80211_link_data *link =
2339                 container_of(delayed_work, struct ieee80211_link_data,
2340                              dfs_cac_timer_work);
2341         struct cfg80211_chan_def chandef = link->conf->chandef;
2342         struct ieee80211_sub_if_data *sdata = link->sdata;
2343
2344         mutex_lock(&sdata->local->mtx);
2345         if (sdata->wdev.cac_started) {
2346                 ieee80211_link_release_channel(link);
2347                 cfg80211_cac_event(sdata->dev, &chandef,
2348                                    NL80211_RADAR_CAC_FINISHED,
2349                                    GFP_KERNEL);
2350         }
2351         mutex_unlock(&sdata->local->mtx);
2352 }
2353
2354 static bool
2355 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2356 {
2357         struct ieee80211_local *local = sdata->local;
2358         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2359         bool ret = false;
2360         int ac;
2361
2362         if (local->hw.queues < IEEE80211_NUM_ACS)
2363                 return false;
2364
2365         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2366                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2367                 int non_acm_ac;
2368                 unsigned long now = jiffies;
2369
2370                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
2371                     tx_tspec->admitted_time &&
2372                     time_after(now, tx_tspec->time_slice_start + HZ)) {
2373                         tx_tspec->consumed_tx_time = 0;
2374                         tx_tspec->time_slice_start = now;
2375
2376                         if (tx_tspec->downgraded)
2377                                 tx_tspec->action =
2378                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
2379                 }
2380
2381                 switch (tx_tspec->action) {
2382                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
2383                         /* take the original parameters */
2384                         if (drv_conf_tx(local, &sdata->deflink, ac,
2385                                         &sdata->deflink.tx_conf[ac]))
2386                                 link_err(&sdata->deflink,
2387                                          "failed to set TX queue parameters for queue %d\n",
2388                                          ac);
2389                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
2390                         tx_tspec->downgraded = false;
2391                         ret = true;
2392                         break;
2393                 case TX_TSPEC_ACTION_DOWNGRADE:
2394                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2395                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2396                                 ret = true;
2397                                 break;
2398                         }
2399                         /* downgrade next lower non-ACM AC */
2400                         for (non_acm_ac = ac + 1;
2401                              non_acm_ac < IEEE80211_NUM_ACS;
2402                              non_acm_ac++)
2403                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
2404                                         break;
2405                         /* Usually the loop will result in using BK even if it
2406                          * requires admission control, but such a configuration
2407                          * makes no sense and we have to transmit somehow - the
2408                          * AC selection does the same thing.
2409                          * If we started out trying to downgrade from BK, then
2410                          * the extra condition here might be needed.
2411                          */
2412                         if (non_acm_ac >= IEEE80211_NUM_ACS)
2413                                 non_acm_ac = IEEE80211_AC_BK;
2414                         if (drv_conf_tx(local, &sdata->deflink, ac,
2415                                         &sdata->deflink.tx_conf[non_acm_ac]))
2416                                 link_err(&sdata->deflink,
2417                                          "failed to set TX queue parameters for queue %d\n",
2418                                          ac);
2419                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
2420                         ret = true;
2421                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
2422                                 tx_tspec->time_slice_start + HZ - now + 1);
2423                         break;
2424                 case TX_TSPEC_ACTION_NONE:
2425                         /* nothing now */
2426                         break;
2427                 }
2428         }
2429
2430         return ret;
2431 }
2432
2433 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2434 {
2435         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2436                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
2437                                                   BSS_CHANGED_QOS);
2438 }
2439
2440 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
2441 {
2442         struct ieee80211_sub_if_data *sdata;
2443
2444         sdata = container_of(work, struct ieee80211_sub_if_data,
2445                              u.mgd.tx_tspec_wk.work);
2446         ieee80211_sta_handle_tspec_ac_params(sdata);
2447 }
2448
2449 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
2450 {
2451         struct ieee80211_sub_if_data *sdata = link->sdata;
2452         struct ieee80211_local *local = sdata->local;
2453         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2454         struct ieee80211_tx_queue_params *params = link->tx_conf;
2455         u8 ac;
2456
2457         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2458                 mlme_dbg(sdata,
2459                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2460                          ac, params[ac].acm,
2461                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2462                          params[ac].txop, params[ac].uapsd,
2463                          ifmgd->tx_tspec[ac].downgraded);
2464                 if (!ifmgd->tx_tspec[ac].downgraded &&
2465                     drv_conf_tx(local, link, ac, &params[ac]))
2466                         link_err(link,
2467                                  "failed to set TX queue parameters for AC %d\n",
2468                                  ac);
2469         }
2470 }
2471
2472 /* MLME */
2473 static bool
2474 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2475                          struct ieee80211_link_data *link,
2476                          const u8 *wmm_param, size_t wmm_param_len,
2477                          const struct ieee80211_mu_edca_param_set *mu_edca)
2478 {
2479         struct ieee80211_sub_if_data *sdata = link->sdata;
2480         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2481         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2482         size_t left;
2483         int count, mu_edca_count, ac;
2484         const u8 *pos;
2485         u8 uapsd_queues = 0;
2486
2487         if (!local->ops->conf_tx)
2488                 return false;
2489
2490         if (local->hw.queues < IEEE80211_NUM_ACS)
2491                 return false;
2492
2493         if (!wmm_param)
2494                 return false;
2495
2496         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2497                 return false;
2498
2499         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2500                 uapsd_queues = ifmgd->uapsd_queues;
2501
2502         count = wmm_param[6] & 0x0f;
2503         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2504          * if mu_edca was preset before and now it disappeared tell
2505          * the driver about it.
2506          */
2507         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2508         if (count == link->u.mgd.wmm_last_param_set &&
2509             mu_edca_count == link->u.mgd.mu_edca_last_param_set)
2510                 return false;
2511         link->u.mgd.wmm_last_param_set = count;
2512         link->u.mgd.mu_edca_last_param_set = mu_edca_count;
2513
2514         pos = wmm_param + 8;
2515         left = wmm_param_len - 8;
2516
2517         memset(&params, 0, sizeof(params));
2518
2519         sdata->wmm_acm = 0;
2520         for (; left >= 4; left -= 4, pos += 4) {
2521                 int aci = (pos[0] >> 5) & 0x03;
2522                 int acm = (pos[0] >> 4) & 0x01;
2523                 bool uapsd = false;
2524
2525                 switch (aci) {
2526                 case 1: /* AC_BK */
2527                         ac = IEEE80211_AC_BK;
2528                         if (acm)
2529                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2530                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2531                                 uapsd = true;
2532                         params[ac].mu_edca = !!mu_edca;
2533                         if (mu_edca)
2534                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2535                         break;
2536                 case 2: /* AC_VI */
2537                         ac = IEEE80211_AC_VI;
2538                         if (acm)
2539                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2540                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2541                                 uapsd = true;
2542                         params[ac].mu_edca = !!mu_edca;
2543                         if (mu_edca)
2544                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2545                         break;
2546                 case 3: /* AC_VO */
2547                         ac = IEEE80211_AC_VO;
2548                         if (acm)
2549                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2550                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2551                                 uapsd = true;
2552                         params[ac].mu_edca = !!mu_edca;
2553                         if (mu_edca)
2554                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2555                         break;
2556                 case 0: /* AC_BE */
2557                 default:
2558                         ac = IEEE80211_AC_BE;
2559                         if (acm)
2560                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2561                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2562                                 uapsd = true;
2563                         params[ac].mu_edca = !!mu_edca;
2564                         if (mu_edca)
2565                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2566                         break;
2567                 }
2568
2569                 params[ac].aifs = pos[0] & 0x0f;
2570
2571                 if (params[ac].aifs < 2) {
2572                         sdata_info(sdata,
2573                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2574                                    params[ac].aifs, aci);
2575                         params[ac].aifs = 2;
2576                 }
2577                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2578                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2579                 params[ac].txop = get_unaligned_le16(pos + 2);
2580                 params[ac].acm = acm;
2581                 params[ac].uapsd = uapsd;
2582
2583                 if (params[ac].cw_min == 0 ||
2584                     params[ac].cw_min > params[ac].cw_max) {
2585                         sdata_info(sdata,
2586                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2587                                    params[ac].cw_min, params[ac].cw_max, aci);
2588                         return false;
2589                 }
2590                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2591         }
2592
2593         /* WMM specification requires all 4 ACIs. */
2594         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2595                 if (params[ac].cw_min == 0) {
2596                         sdata_info(sdata,
2597                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2598                                    ac);
2599                         return false;
2600                 }
2601         }
2602
2603         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2604                 link->tx_conf[ac] = params[ac];
2605
2606         ieee80211_mgd_set_link_qos_params(link);
2607
2608         /* enable WMM or activate new settings */
2609         link->conf->qos = true;
2610         return true;
2611 }
2612
2613 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2614 {
2615         lockdep_assert_held(&sdata->local->mtx);
2616
2617         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2618         ieee80211_run_deferred_scan(sdata->local);
2619 }
2620
2621 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2622 {
2623         mutex_lock(&sdata->local->mtx);
2624         __ieee80211_stop_poll(sdata);
2625         mutex_unlock(&sdata->local->mtx);
2626 }
2627
2628 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
2629                                            u16 capab, bool erp_valid, u8 erp)
2630 {
2631         struct ieee80211_bss_conf *bss_conf = link->conf;
2632         struct ieee80211_supported_band *sband;
2633         u32 changed = 0;
2634         bool use_protection;
2635         bool use_short_preamble;
2636         bool use_short_slot;
2637
2638         sband = ieee80211_get_link_sband(link);
2639         if (!sband)
2640                 return changed;
2641
2642         if (erp_valid) {
2643                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2644                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2645         } else {
2646                 use_protection = false;
2647                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2648         }
2649
2650         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2651         if (sband->band == NL80211_BAND_5GHZ ||
2652             sband->band == NL80211_BAND_6GHZ)
2653                 use_short_slot = true;
2654
2655         if (use_protection != bss_conf->use_cts_prot) {
2656                 bss_conf->use_cts_prot = use_protection;
2657                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2658         }
2659
2660         if (use_short_preamble != bss_conf->use_short_preamble) {
2661                 bss_conf->use_short_preamble = use_short_preamble;
2662                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2663         }
2664
2665         if (use_short_slot != bss_conf->use_short_slot) {
2666                 bss_conf->use_short_slot = use_short_slot;
2667                 changed |= BSS_CHANGED_ERP_SLOT;
2668         }
2669
2670         return changed;
2671 }
2672
2673 static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link,
2674                                          struct cfg80211_bss *cbss)
2675 {
2676         struct ieee80211_sub_if_data *sdata = link->sdata;
2677         struct ieee80211_bss_conf *bss_conf = link->conf;
2678         struct ieee80211_bss *bss = (void *)cbss->priv;
2679         u32 changed = BSS_CHANGED_QOS;
2680
2681         /* not really used in MLO */
2682         sdata->u.mgd.beacon_timeout =
2683                 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count *
2684                                                       bss_conf->beacon_int));
2685
2686         changed |= ieee80211_handle_bss_capability(link,
2687                                                    bss_conf->assoc_capability,
2688                                                    bss->has_erp_value,
2689                                                    bss->erp_value);
2690
2691         ieee80211_check_rate_mask(link);
2692
2693         link->u.mgd.bss = cbss;
2694         memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2695
2696         if (sdata->vif.p2p ||
2697             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2698                 const struct cfg80211_bss_ies *ies;
2699
2700                 rcu_read_lock();
2701                 ies = rcu_dereference(cbss->ies);
2702                 if (ies) {
2703                         int ret;
2704
2705                         ret = cfg80211_get_p2p_attr(
2706                                         ies->data, ies->len,
2707                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2708                                         (u8 *) &bss_conf->p2p_noa_attr,
2709                                         sizeof(bss_conf->p2p_noa_attr));
2710                         if (ret >= 2) {
2711                                 link->u.mgd.p2p_noa_index =
2712                                         bss_conf->p2p_noa_attr.index;
2713                                 changed |= BSS_CHANGED_P2P_PS;
2714                         }
2715                 }
2716                 rcu_read_unlock();
2717         }
2718
2719         if (link->u.mgd.have_beacon) {
2720                 bss_conf->beacon_rate = bss->beacon_rate;
2721                 changed |= BSS_CHANGED_BEACON_INFO;
2722         } else {
2723                 bss_conf->beacon_rate = NULL;
2724         }
2725
2726         /* Tell the driver to monitor connection quality (if supported) */
2727         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2728             bss_conf->cqm_rssi_thold)
2729                 changed |= BSS_CHANGED_CQM;
2730
2731         return changed;
2732 }
2733
2734 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2735                                      struct ieee80211_mgd_assoc_data *assoc_data,
2736                                      u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
2737 {
2738         struct ieee80211_local *local = sdata->local;
2739         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
2740         u64 vif_changed = BSS_CHANGED_ASSOC;
2741         unsigned int link_id;
2742
2743         sdata->u.mgd.associated = true;
2744
2745         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
2746                 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2747                 struct ieee80211_link_data *link;
2748
2749                 if (!cbss ||
2750                     assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
2751                         continue;
2752
2753                 link = sdata_dereference(sdata->link[link_id], sdata);
2754                 if (WARN_ON(!link))
2755                         return;
2756
2757                 changed[link_id] |= ieee80211_link_set_associated(link, cbss);
2758         }
2759
2760         /* just to be sure */
2761         ieee80211_stop_poll(sdata);
2762
2763         ieee80211_led_assoc(local, 1);
2764
2765         vif_cfg->assoc = 1;
2766
2767         /* Enable ARP filtering */
2768         if (vif_cfg->arp_addr_cnt)
2769                 vif_changed |= BSS_CHANGED_ARP_FILTER;
2770
2771         if (sdata->vif.valid_links) {
2772                 for (link_id = 0;
2773                      link_id < IEEE80211_MLD_MAX_NUM_LINKS;
2774                      link_id++) {
2775                         struct ieee80211_link_data *link;
2776                         struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2777
2778                         if (!cbss ||
2779                             assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
2780                                 continue;
2781
2782                         link = sdata_dereference(sdata->link[link_id], sdata);
2783                         if (WARN_ON(!link))
2784                                 return;
2785
2786                         ieee80211_link_info_change_notify(sdata, link,
2787                                                           changed[link_id]);
2788
2789                         ieee80211_recalc_smps(sdata, link);
2790                 }
2791
2792                 ieee80211_vif_cfg_change_notify(sdata, vif_changed);
2793         } else {
2794                 ieee80211_bss_info_change_notify(sdata,
2795                                                  vif_changed | changed[0]);
2796         }
2797
2798         mutex_lock(&local->iflist_mtx);
2799         ieee80211_recalc_ps(local);
2800         mutex_unlock(&local->iflist_mtx);
2801
2802         /* leave this here to not change ordering in non-MLO cases */
2803         if (!sdata->vif.valid_links)
2804                 ieee80211_recalc_smps(sdata, &sdata->deflink);
2805         ieee80211_recalc_ps_vif(sdata);
2806
2807         netif_carrier_on(sdata->dev);
2808 }
2809
2810 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2811                                    u16 stype, u16 reason, bool tx,
2812                                    u8 *frame_buf)
2813 {
2814         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2815         struct ieee80211_local *local = sdata->local;
2816         unsigned int link_id;
2817         u32 changed = 0;
2818         struct ieee80211_prep_tx_info info = {
2819                 .subtype = stype,
2820         };
2821
2822         sdata_assert_lock(sdata);
2823
2824         if (WARN_ON_ONCE(tx && !frame_buf))
2825                 return;
2826
2827         if (WARN_ON(!ifmgd->associated))
2828                 return;
2829
2830         ieee80211_stop_poll(sdata);
2831
2832         ifmgd->associated = false;
2833
2834         /* other links will be destroyed */
2835         sdata->deflink.u.mgd.bss = NULL;
2836
2837         netif_carrier_off(sdata->dev);
2838
2839         /*
2840          * if we want to get out of ps before disassoc (why?) we have
2841          * to do it before sending disassoc, as otherwise the null-packet
2842          * won't be valid.
2843          */
2844         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2845                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2846                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2847         }
2848         local->ps_sdata = NULL;
2849
2850         /* disable per-vif ps */
2851         ieee80211_recalc_ps_vif(sdata);
2852
2853         /* make sure ongoing transmission finishes */
2854         synchronize_net();
2855
2856         /*
2857          * drop any frame before deauth/disassoc, this can be data or
2858          * management frame. Since we are disconnecting, we should not
2859          * insist sending these frames which can take time and delay
2860          * the disconnection and possible the roaming.
2861          */
2862         if (tx)
2863                 ieee80211_flush_queues(local, sdata, true);
2864
2865         /* deauthenticate/disassociate now */
2866         if (tx || frame_buf) {
2867                 /*
2868                  * In multi channel scenarios guarantee that the virtual
2869                  * interface is granted immediate airtime to transmit the
2870                  * deauthentication frame by calling mgd_prepare_tx, if the
2871                  * driver requested so.
2872                  */
2873                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2874                     !sdata->deflink.u.mgd.have_beacon) {
2875                         drv_mgd_prepare_tx(sdata->local, sdata, &info);
2876                 }
2877
2878                 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr,
2879                                                sdata->vif.cfg.ap_addr, stype,
2880                                                reason, tx, frame_buf);
2881         }
2882
2883         /* flush out frame - make sure the deauth was actually sent */
2884         if (tx)
2885                 ieee80211_flush_queues(local, sdata, false);
2886
2887         drv_mgd_complete_tx(sdata->local, sdata, &info);
2888
2889         /* clear AP addr only after building the needed mgmt frames */
2890         eth_zero_addr(sdata->deflink.u.mgd.bssid);
2891         eth_zero_addr(sdata->vif.cfg.ap_addr);
2892
2893         sdata->vif.cfg.ssid_len = 0;
2894
2895         /* remove AP and TDLS peers */
2896         sta_info_flush(sdata);
2897
2898         /* finally reset all BSS / config parameters */
2899         if (!sdata->vif.valid_links)
2900                 changed |= ieee80211_reset_erp_info(sdata);
2901
2902         ieee80211_led_assoc(local, 0);
2903         changed |= BSS_CHANGED_ASSOC;
2904         sdata->vif.cfg.assoc = false;
2905
2906         sdata->deflink.u.mgd.p2p_noa_index = -1;
2907         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2908                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2909
2910         /* on the next assoc, re-program HT/VHT parameters */
2911         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2912         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2913         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2914         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2915
2916         /*
2917          * reset MU-MIMO ownership and group data in default link,
2918          * if used, other links are destroyed
2919          */
2920         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2921                sizeof(sdata->vif.bss_conf.mu_group.membership));
2922         memset(sdata->vif.bss_conf.mu_group.position, 0,
2923                sizeof(sdata->vif.bss_conf.mu_group.position));
2924         if (!sdata->vif.valid_links)
2925                 changed |= BSS_CHANGED_MU_GROUPS;
2926         sdata->vif.bss_conf.mu_mimo_owner = false;
2927
2928         sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2929
2930         del_timer_sync(&local->dynamic_ps_timer);
2931         cancel_work_sync(&local->dynamic_ps_enable_work);
2932
2933         /* Disable ARP filtering */
2934         if (sdata->vif.cfg.arp_addr_cnt)
2935                 changed |= BSS_CHANGED_ARP_FILTER;
2936
2937         sdata->vif.bss_conf.qos = false;
2938         if (!sdata->vif.valid_links) {
2939                 changed |= BSS_CHANGED_QOS;
2940                 /* The BSSID (not really interesting) and HT changed */
2941                 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2942                 ieee80211_bss_info_change_notify(sdata, changed);
2943         } else {
2944                 ieee80211_vif_cfg_change_notify(sdata, changed);
2945         }
2946
2947         /* disassociated - set to defaults now */
2948         ieee80211_set_wmm_default(&sdata->deflink, false, false);
2949
2950         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2951         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2952         del_timer_sync(&sdata->u.mgd.timer);
2953         del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer);
2954
2955         sdata->vif.bss_conf.dtim_period = 0;
2956         sdata->vif.bss_conf.beacon_rate = NULL;
2957
2958         sdata->deflink.u.mgd.have_beacon = false;
2959         sdata->deflink.u.mgd.tracking_signal_avg = false;
2960         sdata->deflink.u.mgd.disable_wmm_tracking = false;
2961
2962         ifmgd->flags = 0;
2963         sdata->deflink.u.mgd.conn_flags = 0;
2964         mutex_lock(&local->mtx);
2965
2966         for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
2967                 struct ieee80211_link_data *link;
2968
2969                 link = sdata_dereference(sdata->link[link_id], sdata);
2970                 if (!link)
2971                         continue;
2972                 ieee80211_link_release_channel(link);
2973         }
2974
2975         sdata->vif.bss_conf.csa_active = false;
2976         sdata->deflink.u.mgd.csa_waiting_bcn = false;
2977         sdata->deflink.u.mgd.csa_ignored_same_chan = false;
2978         if (sdata->deflink.csa_block_tx) {
2979                 ieee80211_wake_vif_queues(local, sdata,
2980                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2981                 sdata->deflink.csa_block_tx = false;
2982         }
2983         mutex_unlock(&local->mtx);
2984
2985         /* existing TX TSPEC sessions no longer exist */
2986         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2987         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2988
2989         sdata->vif.bss_conf.pwr_reduction = 0;
2990         sdata->vif.bss_conf.tx_pwr_env_num = 0;
2991         memset(sdata->vif.bss_conf.tx_pwr_env, 0,
2992                sizeof(sdata->vif.bss_conf.tx_pwr_env));
2993
2994         ieee80211_vif_set_links(sdata, 0);
2995 }
2996
2997 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2998 {
2999         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3000         struct ieee80211_local *local = sdata->local;
3001
3002         mutex_lock(&local->mtx);
3003         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
3004                 goto out;
3005
3006         __ieee80211_stop_poll(sdata);
3007
3008         mutex_lock(&local->iflist_mtx);
3009         ieee80211_recalc_ps(local);
3010         mutex_unlock(&local->iflist_mtx);
3011
3012         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3013                 goto out;
3014
3015         /*
3016          * We've received a probe response, but are not sure whether
3017          * we have or will be receiving any beacons or data, so let's
3018          * schedule the timers again, just in case.
3019          */
3020         ieee80211_sta_reset_beacon_monitor(sdata);
3021
3022         mod_timer(&ifmgd->conn_mon_timer,
3023                   round_jiffies_up(jiffies +
3024                                    IEEE80211_CONNECTION_IDLE_TIME));
3025 out:
3026         mutex_unlock(&local->mtx);
3027 }
3028
3029 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
3030                                            struct ieee80211_hdr *hdr,
3031                                            u16 tx_time)
3032 {
3033         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3034         u16 tid;
3035         int ac;
3036         struct ieee80211_sta_tx_tspec *tx_tspec;
3037         unsigned long now = jiffies;
3038
3039         if (!ieee80211_is_data_qos(hdr->frame_control))
3040                 return;
3041
3042         tid = ieee80211_get_tid(hdr);
3043         ac = ieee80211_ac_from_tid(tid);
3044         tx_tspec = &ifmgd->tx_tspec[ac];
3045
3046         if (likely(!tx_tspec->admitted_time))
3047                 return;
3048
3049         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3050                 tx_tspec->consumed_tx_time = 0;
3051                 tx_tspec->time_slice_start = now;
3052
3053                 if (tx_tspec->downgraded) {
3054                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3055                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3056                 }
3057         }
3058
3059         if (tx_tspec->downgraded)
3060                 return;
3061
3062         tx_tspec->consumed_tx_time += tx_time;
3063
3064         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
3065                 tx_tspec->downgraded = true;
3066                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
3067                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3068         }
3069 }
3070
3071 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
3072                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
3073 {
3074         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
3075
3076         if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
3077             !sdata->u.mgd.probe_send_count)
3078                 return;
3079
3080         if (ack)
3081                 sdata->u.mgd.probe_send_count = 0;
3082         else
3083                 sdata->u.mgd.nullfunc_failed = true;
3084         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3085 }
3086
3087 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
3088                                           const u8 *src, const u8 *dst,
3089                                           const u8 *ssid, size_t ssid_len,
3090                                           struct ieee80211_channel *channel)
3091 {
3092         struct sk_buff *skb;
3093
3094         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
3095                                         ssid, ssid_len, NULL, 0,
3096                                         IEEE80211_PROBE_FLAG_DIRECTED);
3097         if (skb)
3098                 ieee80211_tx_skb(sdata, skb);
3099 }
3100
3101 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
3102 {
3103         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3104         u8 *dst = sdata->vif.cfg.ap_addr;
3105         u8 unicast_limit = max(1, max_probe_tries - 3);
3106         struct sta_info *sta;
3107
3108         if (WARN_ON(sdata->vif.valid_links))
3109                 return;
3110
3111         /*
3112          * Try sending broadcast probe requests for the last three
3113          * probe requests after the first ones failed since some
3114          * buggy APs only support broadcast probe requests.
3115          */
3116         if (ifmgd->probe_send_count >= unicast_limit)
3117                 dst = NULL;
3118
3119         /*
3120          * When the hardware reports an accurate Tx ACK status, it's
3121          * better to send a nullfunc frame instead of a probe request,
3122          * as it will kick us off the AP quickly if we aren't associated
3123          * anymore. The timeout will be reset if the frame is ACKed by
3124          * the AP.
3125          */
3126         ifmgd->probe_send_count++;
3127
3128         if (dst) {
3129                 mutex_lock(&sdata->local->sta_mtx);
3130                 sta = sta_info_get(sdata, dst);
3131                 if (!WARN_ON(!sta))
3132                         ieee80211_check_fast_rx(sta);
3133                 mutex_unlock(&sdata->local->sta_mtx);
3134         }
3135
3136         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
3137                 ifmgd->nullfunc_failed = false;
3138                 ieee80211_send_nullfunc(sdata->local, sdata, false);
3139         } else {
3140                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
3141                                               sdata->vif.cfg.ssid,
3142                                               sdata->vif.cfg.ssid_len,
3143                                               sdata->deflink.u.mgd.bss->channel);
3144         }
3145
3146         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
3147         run_again(sdata, ifmgd->probe_timeout);
3148 }
3149
3150 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
3151                                    bool beacon)
3152 {
3153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3154         bool already = false;
3155
3156         if (WARN_ON(sdata->vif.valid_links))
3157                 return;
3158
3159         if (!ieee80211_sdata_running(sdata))
3160                 return;
3161
3162         sdata_lock(sdata);
3163
3164         if (!ifmgd->associated)
3165                 goto out;
3166
3167         mutex_lock(&sdata->local->mtx);
3168
3169         if (sdata->local->tmp_channel || sdata->local->scanning) {
3170                 mutex_unlock(&sdata->local->mtx);
3171                 goto out;
3172         }
3173
3174         if (sdata->local->suspending) {
3175                 /* reschedule after resume */
3176                 mutex_unlock(&sdata->local->mtx);
3177                 ieee80211_reset_ap_probe(sdata);
3178                 goto out;
3179         }
3180
3181         if (beacon) {
3182                 mlme_dbg_ratelimited(sdata,
3183                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
3184                                      beacon_loss_count);
3185
3186                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
3187         }
3188
3189         /*
3190          * The driver/our work has already reported this event or the
3191          * connection monitoring has kicked in and we have already sent
3192          * a probe request. Or maybe the AP died and the driver keeps
3193          * reporting until we disassociate...
3194          *
3195          * In either case we have to ignore the current call to this
3196          * function (except for setting the correct probe reason bit)
3197          * because otherwise we would reset the timer every time and
3198          * never check whether we received a probe response!
3199          */
3200         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
3201                 already = true;
3202
3203         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
3204
3205         mutex_unlock(&sdata->local->mtx);
3206
3207         if (already)
3208                 goto out;
3209
3210         mutex_lock(&sdata->local->iflist_mtx);
3211         ieee80211_recalc_ps(sdata->local);
3212         mutex_unlock(&sdata->local->iflist_mtx);
3213
3214         ifmgd->probe_send_count = 0;
3215         ieee80211_mgd_probe_ap_send(sdata);
3216  out:
3217         sdata_unlock(sdata);
3218 }
3219
3220 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
3221                                           struct ieee80211_vif *vif)
3222 {
3223         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3224         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3225         struct cfg80211_bss *cbss;
3226         struct sk_buff *skb;
3227         const struct element *ssid;
3228         int ssid_len;
3229
3230         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
3231                     sdata->vif.valid_links))
3232                 return NULL;
3233
3234         sdata_assert_lock(sdata);
3235
3236         if (ifmgd->associated)
3237                 cbss = sdata->deflink.u.mgd.bss;
3238         else if (ifmgd->auth_data)
3239                 cbss = ifmgd->auth_data->bss;
3240         else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss)
3241                 cbss = ifmgd->assoc_data->link[0].bss;
3242         else
3243                 return NULL;
3244
3245         rcu_read_lock();
3246         ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
3247         if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
3248                       "invalid SSID element (len=%d)",
3249                       ssid ? ssid->datalen : -1))
3250                 ssid_len = 0;
3251         else
3252                 ssid_len = ssid->datalen;
3253
3254         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
3255                                         (u32) -1, cbss->channel,
3256                                         ssid->data, ssid_len,
3257                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
3258         rcu_read_unlock();
3259
3260         return skb;
3261 }
3262 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
3263
3264 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
3265                                         const u8 *buf, size_t len, bool tx,
3266                                         u16 reason, bool reconnect)
3267 {
3268         struct ieee80211_event event = {
3269                 .type = MLME_EVENT,
3270                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
3271                 .u.mlme.reason = reason,
3272         };
3273
3274         if (tx)
3275                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
3276         else
3277                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
3278
3279         drv_event_callback(sdata->local, sdata, &event);
3280 }
3281
3282 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
3283 {
3284         struct ieee80211_local *local = sdata->local;
3285         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3286         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3287         bool tx;
3288
3289         sdata_lock(sdata);
3290         if (!ifmgd->associated) {
3291                 sdata_unlock(sdata);
3292                 return;
3293         }
3294
3295         /* in MLO assume we have a link where we can TX the frame */
3296         tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx;
3297
3298         if (!ifmgd->driver_disconnect) {
3299                 unsigned int link_id;
3300
3301                 /*
3302                  * AP is probably out of range (or not reachable for another
3303                  * reason) so remove the bss structs for that AP. In the case
3304                  * of multi-link, it's not clear that all of them really are
3305                  * out of range, but if they weren't the driver likely would
3306                  * have switched to just have a single link active?
3307                  */
3308                 for (link_id = 0;
3309                      link_id < ARRAY_SIZE(sdata->link);
3310                      link_id++) {
3311                         struct ieee80211_link_data *link;
3312
3313                         link = sdata_dereference(sdata->link[link_id], sdata);
3314                         if (!link)
3315                                 continue;
3316                         cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss);
3317                         link->u.mgd.bss = NULL;
3318                 }
3319         }
3320
3321         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3322                                ifmgd->driver_disconnect ?
3323                                         WLAN_REASON_DEAUTH_LEAVING :
3324                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3325                                tx, frame_buf);
3326         mutex_lock(&local->mtx);
3327         /* the other links will be destroyed */
3328         sdata->vif.bss_conf.csa_active = false;
3329         sdata->deflink.u.mgd.csa_waiting_bcn = false;
3330         if (sdata->deflink.csa_block_tx) {
3331                 ieee80211_wake_vif_queues(local, sdata,
3332                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3333                 sdata->deflink.csa_block_tx = false;
3334         }
3335         mutex_unlock(&local->mtx);
3336
3337         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
3338                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3339                                     ifmgd->reconnect);
3340         ifmgd->reconnect = false;
3341
3342         sdata_unlock(sdata);
3343 }
3344
3345 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
3346 {
3347         struct ieee80211_sub_if_data *sdata =
3348                 container_of(work, struct ieee80211_sub_if_data,
3349                              u.mgd.beacon_connection_loss_work);
3350         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3351
3352         if (ifmgd->connection_loss) {
3353                 sdata_info(sdata, "Connection to AP %pM lost\n",
3354                            sdata->vif.cfg.ap_addr);
3355                 __ieee80211_disconnect(sdata);
3356                 ifmgd->connection_loss = false;
3357         } else if (ifmgd->driver_disconnect) {
3358                 sdata_info(sdata,
3359                            "Driver requested disconnection from AP %pM\n",
3360                            sdata->vif.cfg.ap_addr);
3361                 __ieee80211_disconnect(sdata);
3362                 ifmgd->driver_disconnect = false;
3363         } else {
3364                 if (ifmgd->associated)
3365                         sdata->deflink.u.mgd.beacon_loss_count++;
3366                 ieee80211_mgd_probe_ap(sdata, true);
3367         }
3368 }
3369
3370 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
3371 {
3372         struct ieee80211_sub_if_data *sdata =
3373                 container_of(work, struct ieee80211_sub_if_data,
3374                              u.mgd.csa_connection_drop_work);
3375
3376         __ieee80211_disconnect(sdata);
3377 }
3378
3379 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
3380 {
3381         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3382         struct ieee80211_hw *hw = &sdata->local->hw;
3383
3384         trace_api_beacon_loss(sdata);
3385
3386         sdata->u.mgd.connection_loss = false;
3387         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3388 }
3389 EXPORT_SYMBOL(ieee80211_beacon_loss);
3390
3391 void ieee80211_connection_loss(struct ieee80211_vif *vif)
3392 {
3393         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3394         struct ieee80211_hw *hw = &sdata->local->hw;
3395
3396         trace_api_connection_loss(sdata);
3397
3398         sdata->u.mgd.connection_loss = true;
3399         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3400 }
3401 EXPORT_SYMBOL(ieee80211_connection_loss);
3402
3403 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
3404 {
3405         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3406         struct ieee80211_hw *hw = &sdata->local->hw;
3407
3408         trace_api_disconnect(sdata, reconnect);
3409
3410         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
3411                 return;
3412
3413         sdata->u.mgd.driver_disconnect = true;
3414         sdata->u.mgd.reconnect = reconnect;
3415         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3416 }
3417 EXPORT_SYMBOL(ieee80211_disconnect);
3418
3419 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
3420                                         bool assoc)
3421 {
3422         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3423
3424         sdata_assert_lock(sdata);
3425
3426         if (!assoc) {
3427                 /*
3428                  * we are not authenticated yet, the only timer that could be
3429                  * running is the timeout for the authentication response which
3430                  * which is not relevant anymore.
3431                  */
3432                 del_timer_sync(&sdata->u.mgd.timer);
3433                 sta_info_destroy_addr(sdata, auth_data->ap_addr);
3434
3435                 /* other links are destroyed */
3436                 sdata->deflink.u.mgd.conn_flags = 0;
3437                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3438                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3439                                                   BSS_CHANGED_BSSID);
3440                 sdata->u.mgd.flags = 0;
3441
3442                 mutex_lock(&sdata->local->mtx);
3443                 ieee80211_link_release_channel(&sdata->deflink);
3444                 ieee80211_vif_set_links(sdata, 0);
3445                 mutex_unlock(&sdata->local->mtx);
3446         }
3447
3448         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
3449         kfree(auth_data);
3450         sdata->u.mgd.auth_data = NULL;
3451 }
3452
3453 enum assoc_status {
3454         ASSOC_SUCCESS,
3455         ASSOC_REJECTED,
3456         ASSOC_TIMEOUT,
3457         ASSOC_ABANDON,
3458 };
3459
3460 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
3461                                          enum assoc_status status)
3462 {
3463         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3464
3465         sdata_assert_lock(sdata);
3466
3467         if (status != ASSOC_SUCCESS) {
3468                 /*
3469                  * we are not associated yet, the only timer that could be
3470                  * running is the timeout for the association response which
3471                  * which is not relevant anymore.
3472                  */
3473                 del_timer_sync(&sdata->u.mgd.timer);
3474                 sta_info_destroy_addr(sdata, assoc_data->ap_addr);
3475
3476                 sdata->deflink.u.mgd.conn_flags = 0;
3477                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3478                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3479                                                   BSS_CHANGED_BSSID);
3480                 sdata->u.mgd.flags = 0;
3481                 sdata->vif.bss_conf.mu_mimo_owner = false;
3482
3483                 if (status != ASSOC_REJECTED) {
3484                         struct cfg80211_assoc_failure data = {
3485                                 .timeout = status == ASSOC_TIMEOUT,
3486                         };
3487                         int i;
3488
3489                         BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
3490                                      ARRAY_SIZE(assoc_data->link));
3491
3492                         for (i = 0; i < ARRAY_SIZE(data.bss); i++)
3493                                 data.bss[i] = assoc_data->link[i].bss;
3494
3495                         if (sdata->vif.valid_links)
3496                                 data.ap_mld_addr = assoc_data->ap_addr;
3497
3498                         cfg80211_assoc_failure(sdata->dev, &data);
3499                 }
3500
3501                 mutex_lock(&sdata->local->mtx);
3502                 ieee80211_link_release_channel(&sdata->deflink);
3503                 ieee80211_vif_set_links(sdata, 0);
3504                 mutex_unlock(&sdata->local->mtx);
3505         }
3506
3507         kfree(assoc_data);
3508         sdata->u.mgd.assoc_data = NULL;
3509 }
3510
3511 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
3512                                      struct ieee80211_mgmt *mgmt, size_t len)
3513 {
3514         struct ieee80211_local *local = sdata->local;
3515         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3516         const struct element *challenge;
3517         u8 *pos;
3518         u32 tx_flags = 0;
3519         struct ieee80211_prep_tx_info info = {
3520                 .subtype = IEEE80211_STYPE_AUTH,
3521         };
3522
3523         pos = mgmt->u.auth.variable;
3524         challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
3525                                        len - (pos - (u8 *)mgmt));
3526         if (!challenge)
3527                 return;
3528         auth_data->expected_transaction = 4;
3529         drv_mgd_prepare_tx(sdata->local, sdata, &info);
3530         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3531                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3532                            IEEE80211_TX_INTFL_MLME_CONN_TX;
3533         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
3534                             (void *)challenge,
3535                             challenge->datalen + sizeof(*challenge),
3536                             auth_data->ap_addr, auth_data->ap_addr,
3537                             auth_data->key, auth_data->key_len,
3538                             auth_data->key_idx, tx_flags);
3539 }
3540
3541 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
3542 {
3543         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3544         const u8 *ap_addr = ifmgd->auth_data->ap_addr;
3545         struct sta_info *sta;
3546         bool result = true;
3547
3548         sdata_info(sdata, "authenticated\n");
3549         ifmgd->auth_data->done = true;
3550         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
3551         ifmgd->auth_data->timeout_started = true;
3552         run_again(sdata, ifmgd->auth_data->timeout);
3553
3554         /* move station state to auth */
3555         mutex_lock(&sdata->local->sta_mtx);
3556         sta = sta_info_get(sdata, ap_addr);
3557         if (!sta) {
3558                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
3559                 result = false;
3560                 goto out;
3561         }
3562         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
3563                 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
3564                 result = false;
3565                 goto out;
3566         }
3567
3568 out:
3569         mutex_unlock(&sdata->local->sta_mtx);
3570         return result;
3571 }
3572
3573 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3574                                    struct ieee80211_mgmt *mgmt, size_t len)
3575 {
3576         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3577         u16 auth_alg, auth_transaction, status_code;
3578         struct ieee80211_event event = {
3579                 .type = MLME_EVENT,
3580                 .u.mlme.data = AUTH_EVENT,
3581         };
3582         struct ieee80211_prep_tx_info info = {
3583                 .subtype = IEEE80211_STYPE_AUTH,
3584         };
3585
3586         sdata_assert_lock(sdata);
3587
3588         if (len < 24 + 6)
3589                 return;
3590
3591         if (!ifmgd->auth_data || ifmgd->auth_data->done)
3592                 return;
3593
3594         if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid))
3595                 return;
3596
3597         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3598         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3599         status_code = le16_to_cpu(mgmt->u.auth.status_code);
3600
3601         if (auth_alg != ifmgd->auth_data->algorithm ||
3602             (auth_alg != WLAN_AUTH_SAE &&
3603              auth_transaction != ifmgd->auth_data->expected_transaction) ||
3604             (auth_alg == WLAN_AUTH_SAE &&
3605              (auth_transaction < ifmgd->auth_data->expected_transaction ||
3606               auth_transaction > 2))) {
3607                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3608                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3609                            auth_transaction,
3610                            ifmgd->auth_data->expected_transaction);
3611                 goto notify_driver;
3612         }
3613
3614         if (status_code != WLAN_STATUS_SUCCESS) {
3615                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3616
3617                 if (auth_alg == WLAN_AUTH_SAE &&
3618                     (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3619                      (auth_transaction == 1 &&
3620                       (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3621                        status_code == WLAN_STATUS_SAE_PK)))) {
3622                         /* waiting for userspace now */
3623                         ifmgd->auth_data->waiting = true;
3624                         ifmgd->auth_data->timeout =
3625                                 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
3626                         ifmgd->auth_data->timeout_started = true;
3627                         run_again(sdata, ifmgd->auth_data->timeout);
3628                         goto notify_driver;
3629                 }
3630
3631                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
3632                            mgmt->sa, status_code);
3633                 ieee80211_destroy_auth_data(sdata, false);
3634                 event.u.mlme.status = MLME_DENIED;
3635                 event.u.mlme.reason = status_code;
3636                 drv_event_callback(sdata->local, sdata, &event);
3637                 goto notify_driver;
3638         }
3639
3640         switch (ifmgd->auth_data->algorithm) {
3641         case WLAN_AUTH_OPEN:
3642         case WLAN_AUTH_LEAP:
3643         case WLAN_AUTH_FT:
3644         case WLAN_AUTH_SAE:
3645         case WLAN_AUTH_FILS_SK:
3646         case WLAN_AUTH_FILS_SK_PFS:
3647         case WLAN_AUTH_FILS_PK:
3648                 break;
3649         case WLAN_AUTH_SHARED_KEY:
3650                 if (ifmgd->auth_data->expected_transaction != 4) {
3651                         ieee80211_auth_challenge(sdata, mgmt, len);
3652                         /* need another frame */
3653                         return;
3654                 }
3655                 break;
3656         default:
3657                 WARN_ONCE(1, "invalid auth alg %d",
3658                           ifmgd->auth_data->algorithm);
3659                 goto notify_driver;
3660         }
3661
3662         event.u.mlme.status = MLME_SUCCESS;
3663         info.success = 1;
3664         drv_event_callback(sdata->local, sdata, &event);
3665         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3666             (auth_transaction == 2 &&
3667              ifmgd->auth_data->expected_transaction == 2)) {
3668                 if (!ieee80211_mark_sta_auth(sdata))
3669                         return; /* ignore frame -- wait for timeout */
3670         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3671                    auth_transaction == 2) {
3672                 sdata_info(sdata, "SAE peer confirmed\n");
3673                 ifmgd->auth_data->peer_confirmed = true;
3674         }
3675
3676         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3677 notify_driver:
3678         drv_mgd_complete_tx(sdata->local, sdata, &info);
3679 }
3680
3681 #define case_WLAN(type) \
3682         case WLAN_REASON_##type: return #type
3683
3684 const char *ieee80211_get_reason_code_string(u16 reason_code)
3685 {
3686         switch (reason_code) {
3687         case_WLAN(UNSPECIFIED);
3688         case_WLAN(PREV_AUTH_NOT_VALID);
3689         case_WLAN(DEAUTH_LEAVING);
3690         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3691         case_WLAN(DISASSOC_AP_BUSY);
3692         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3693         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3694         case_WLAN(DISASSOC_STA_HAS_LEFT);
3695         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3696         case_WLAN(DISASSOC_BAD_POWER);
3697         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3698         case_WLAN(INVALID_IE);
3699         case_WLAN(MIC_FAILURE);
3700         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3701         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3702         case_WLAN(IE_DIFFERENT);
3703         case_WLAN(INVALID_GROUP_CIPHER);
3704         case_WLAN(INVALID_PAIRWISE_CIPHER);
3705         case_WLAN(INVALID_AKMP);
3706         case_WLAN(UNSUPP_RSN_VERSION);
3707         case_WLAN(INVALID_RSN_IE_CAP);
3708         case_WLAN(IEEE8021X_FAILED);
3709         case_WLAN(CIPHER_SUITE_REJECTED);
3710         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3711         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3712         case_WLAN(DISASSOC_LOW_ACK);
3713         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3714         case_WLAN(QSTA_LEAVE_QBSS);
3715         case_WLAN(QSTA_NOT_USE);
3716         case_WLAN(QSTA_REQUIRE_SETUP);
3717         case_WLAN(QSTA_TIMEOUT);
3718         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3719         case_WLAN(MESH_PEER_CANCELED);
3720         case_WLAN(MESH_MAX_PEERS);
3721         case_WLAN(MESH_CONFIG);
3722         case_WLAN(MESH_CLOSE);
3723         case_WLAN(MESH_MAX_RETRIES);
3724         case_WLAN(MESH_CONFIRM_TIMEOUT);
3725         case_WLAN(MESH_INVALID_GTK);
3726         case_WLAN(MESH_INCONSISTENT_PARAM);
3727         case_WLAN(MESH_INVALID_SECURITY);
3728         case_WLAN(MESH_PATH_ERROR);
3729         case_WLAN(MESH_PATH_NOFORWARD);
3730         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3731         case_WLAN(MAC_EXISTS_IN_MBSS);
3732         case_WLAN(MESH_CHAN_REGULATORY);
3733         case_WLAN(MESH_CHAN);
3734         default: return "<unknown>";
3735         }
3736 }
3737
3738 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3739                                      struct ieee80211_mgmt *mgmt, size_t len)
3740 {
3741         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3742         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3743
3744         sdata_assert_lock(sdata);
3745
3746         if (len < 24 + 2)
3747                 return;
3748
3749         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3750                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3751                 return;
3752         }
3753
3754         if (ifmgd->associated &&
3755             ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) {
3756                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3757                            sdata->vif.cfg.ap_addr, reason_code,
3758                            ieee80211_get_reason_code_string(reason_code));
3759
3760                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3761
3762                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3763                                             reason_code, false);
3764                 return;
3765         }
3766
3767         if (ifmgd->assoc_data &&
3768             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) {
3769                 sdata_info(sdata,
3770                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3771                            ifmgd->assoc_data->ap_addr, reason_code,
3772                            ieee80211_get_reason_code_string(reason_code));
3773
3774                 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
3775
3776                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3777                 return;
3778         }
3779 }
3780
3781
3782 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3783                                        struct ieee80211_mgmt *mgmt, size_t len)
3784 {
3785         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3786         u16 reason_code;
3787
3788         sdata_assert_lock(sdata);
3789
3790         if (len < 24 + 2)
3791                 return;
3792
3793         if (!ifmgd->associated ||
3794             !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
3795                 return;
3796
3797         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3798
3799         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3800                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3801                 return;
3802         }
3803
3804         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3805                    sdata->vif.cfg.ap_addr, reason_code,
3806                    ieee80211_get_reason_code_string(reason_code));
3807
3808         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3809
3810         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3811                                     false);
3812 }
3813
3814 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3815                                 u8 *supp_rates, unsigned int supp_rates_len,
3816                                 u32 *rates, u32 *basic_rates,
3817                                 bool *have_higher_than_11mbit,
3818                                 int *min_rate, int *min_rate_index,
3819                                 int shift)
3820 {
3821         int i, j;
3822
3823         for (i = 0; i < supp_rates_len; i++) {
3824                 int rate = supp_rates[i] & 0x7f;
3825                 bool is_basic = !!(supp_rates[i] & 0x80);
3826
3827                 if ((rate * 5 * (1 << shift)) > 110)
3828                         *have_higher_than_11mbit = true;
3829
3830                 /*
3831                  * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
3832                  * since they're not rates.
3833                  *
3834                  * Note: Even though the membership selector and the basic
3835                  *       rate flag share the same bit, they are not exactly
3836                  *       the same.
3837                  */
3838                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3839                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3840                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3841                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3842                         continue;
3843
3844                 for (j = 0; j < sband->n_bitrates; j++) {
3845                         struct ieee80211_rate *br;
3846                         int brate;
3847
3848                         br = &sband->bitrates[j];
3849
3850                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3851                         if (brate == rate) {
3852                                 *rates |= BIT(j);
3853                                 if (is_basic)
3854                                         *basic_rates |= BIT(j);
3855                                 if ((rate * 5) < *min_rate) {
3856                                         *min_rate = rate * 5;
3857                                         *min_rate_index = j;
3858                                 }
3859                                 break;
3860                         }
3861                 }
3862         }
3863 }
3864
3865 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata,
3866                                         struct ieee80211_supported_band *sband,
3867                                         const struct link_sta_info *link_sta,
3868                                         const struct ieee802_11_elems *elems)
3869 {
3870         const struct ieee80211_sta_he_cap *own_he_cap =
3871                 ieee80211_get_he_iftype_cap(sband,
3872                                             ieee80211_vif_type_p2p(&sdata->vif));
3873
3874         if (elems->ext_capab_len < 10)
3875                 return false;
3876
3877         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3878                 return false;
3879
3880         return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] &
3881                 IEEE80211_HE_MAC_CAP0_TWT_RES &&
3882                 own_he_cap &&
3883                 (own_he_cap->he_cap_elem.mac_cap_info[0] &
3884                         IEEE80211_HE_MAC_CAP0_TWT_REQ);
3885 }
3886
3887 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3888                                     struct ieee80211_supported_band *sband,
3889                                     struct ieee80211_link_data *link,
3890                                     struct link_sta_info *link_sta,
3891                                     struct ieee802_11_elems *elems)
3892 {
3893         bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems);
3894
3895         if (link->conf->twt_requester != twt) {
3896                 link->conf->twt_requester = twt;
3897                 return BSS_CHANGED_TWT;
3898         }
3899         return 0;
3900 }
3901
3902 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
3903                                         struct ieee80211_bss_conf *bss_conf,
3904                                         struct ieee80211_supported_band *sband,
3905                                         struct link_sta_info *link_sta)
3906 {
3907         const struct ieee80211_sta_he_cap *own_he_cap =
3908                 ieee80211_get_he_iftype_cap(sband,
3909                                             ieee80211_vif_type_p2p(&sdata->vif));
3910
3911         return bss_conf->he_support &&
3912                 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] &
3913                         IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
3914                 own_he_cap &&
3915                 (own_he_cap->he_cap_elem.mac_cap_info[2] &
3916                         IEEE80211_HE_MAC_CAP2_BCAST_TWT);
3917 }
3918
3919 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
3920                                         struct link_sta_info *link_sta,
3921                                         struct cfg80211_bss *cbss,
3922                                         struct ieee80211_mgmt *mgmt,
3923                                         const u8 *elem_start,
3924                                         unsigned int elem_len,
3925                                         u64 *changed)
3926 {
3927         struct ieee80211_sub_if_data *sdata = link->sdata;
3928         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3929         struct ieee80211_bss_conf *bss_conf = link->conf;
3930         struct ieee80211_local *local = sdata->local;
3931         unsigned int link_id = link->link_id;
3932         struct ieee80211_elems_parse_params parse_params = {
3933                 .start = elem_start,
3934                 .len = elem_len,
3935                 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id,
3936                 .from_ap = true,
3937         };
3938         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3939         bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
3940         const struct cfg80211_bss_ies *bss_ies = NULL;
3941         struct ieee80211_supported_band *sband;
3942         struct ieee802_11_elems *elems;
3943         u16 capab_info;
3944         bool ret;
3945
3946         elems = ieee802_11_parse_elems_full(&parse_params);
3947         if (!elems)
3948                 return false;
3949
3950         if (link_id == assoc_data->assoc_link_id) {
3951                 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3952
3953                 /*
3954                  * we should not get to this flow unless the association was
3955                  * successful, so set the status directly to success
3956                  */
3957                 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS;
3958         } else if (!elems->prof) {
3959                 ret = false;
3960                 goto out;
3961         } else {
3962                 const u8 *ptr = elems->prof->variable +
3963                                 elems->prof->sta_info_len - 1;
3964
3965                 /*
3966                  * During parsing, we validated that these fields exist,
3967                  * otherwise elems->prof would have been set to NULL.
3968                  */
3969                 capab_info = get_unaligned_le16(ptr);
3970                 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2);
3971
3972                 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
3973                         link_info(link, "association response status code=%u\n",
3974                                   assoc_data->link[link_id].status);
3975                         ret = true;
3976                         goto out;
3977                 }
3978         }
3979
3980         if (!is_s1g && !elems->supp_rates) {
3981                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3982                 ret = false;
3983                 goto out;
3984         }
3985
3986         link->u.mgd.tdls_chan_switch_prohibited =
3987                 elems->ext_capab && elems->ext_capab_len >= 5 &&
3988                 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3989
3990         /*
3991          * Some APs are erroneously not including some information in their
3992          * (re)association response frames. Try to recover by using the data
3993          * from the beacon or probe response. This seems to afflict mobile
3994          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3995          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3996          */
3997         if (!is_6ghz &&
3998             ((assoc_data->wmm && !elems->wmm_param) ||
3999              (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
4000               (!elems->ht_cap_elem || !elems->ht_operation)) ||
4001              (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
4002               (!elems->vht_cap_elem || !elems->vht_operation)))) {
4003                 const struct cfg80211_bss_ies *ies;
4004                 struct ieee802_11_elems *bss_elems;
4005
4006                 rcu_read_lock();
4007                 ies = rcu_dereference(cbss->ies);
4008                 if (ies)
4009                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
4010                                           GFP_ATOMIC);
4011                 rcu_read_unlock();
4012                 if (!bss_ies) {
4013                         ret = false;
4014                         goto out;
4015                 }
4016
4017                 parse_params.start = bss_ies->data;
4018                 parse_params.len = bss_ies->len;
4019                 parse_params.bss = cbss;
4020                 bss_elems = ieee802_11_parse_elems_full(&parse_params);
4021                 if (!bss_elems) {
4022                         ret = false;
4023                         goto out;
4024                 }
4025
4026                 if (assoc_data->wmm &&
4027                     !elems->wmm_param && bss_elems->wmm_param) {
4028                         elems->wmm_param = bss_elems->wmm_param;
4029                         sdata_info(sdata,
4030                                    "AP bug: WMM param missing from AssocResp\n");
4031                 }
4032
4033                 /*
4034                  * Also check if we requested HT/VHT, otherwise the AP doesn't
4035                  * have to include the IEs in the (re)association response.
4036                  */
4037                 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
4038                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4039                         elems->ht_cap_elem = bss_elems->ht_cap_elem;
4040                         sdata_info(sdata,
4041                                    "AP bug: HT capability missing from AssocResp\n");
4042                 }
4043                 if (!elems->ht_operation && bss_elems->ht_operation &&
4044                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4045                         elems->ht_operation = bss_elems->ht_operation;
4046                         sdata_info(sdata,
4047                                    "AP bug: HT operation missing from AssocResp\n");
4048                 }
4049                 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
4050                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4051                         elems->vht_cap_elem = bss_elems->vht_cap_elem;
4052                         sdata_info(sdata,
4053                                    "AP bug: VHT capa missing from AssocResp\n");
4054                 }
4055                 if (!elems->vht_operation && bss_elems->vht_operation &&
4056                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4057                         elems->vht_operation = bss_elems->vht_operation;
4058                         sdata_info(sdata,
4059                                    "AP bug: VHT operation missing from AssocResp\n");
4060                 }
4061
4062                 kfree(bss_elems);
4063         }
4064
4065         /*
4066          * We previously checked these in the beacon/probe response, so
4067          * they should be present here. This is just a safety net.
4068          */
4069         if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
4070             (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
4071                 sdata_info(sdata,
4072                            "HT AP is missing WMM params or HT capability/operation\n");
4073                 ret = false;
4074                 goto out;
4075         }
4076
4077         if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
4078             (!elems->vht_cap_elem || !elems->vht_operation)) {
4079                 sdata_info(sdata,
4080                            "VHT AP is missing VHT capability/operation\n");
4081                 ret = false;
4082                 goto out;
4083         }
4084
4085         if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4086             !elems->he_6ghz_capa) {
4087                 sdata_info(sdata,
4088                            "HE 6 GHz AP is missing HE 6 GHz band capability\n");
4089                 ret = false;
4090                 goto out;
4091         }
4092
4093         if (WARN_ON(!link->conf->chandef.chan)) {
4094                 ret = false;
4095                 goto out;
4096         }
4097         sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
4098
4099         if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4100             (!elems->he_cap || !elems->he_operation)) {
4101                 sdata_info(sdata,
4102                            "HE AP is missing HE capability/operation\n");
4103                 ret = false;
4104                 goto out;
4105         }
4106
4107         /* Set up internal HT/VHT capabilities */
4108         if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT))
4109                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
4110                                                   elems->ht_cap_elem,
4111                                                   link_sta);
4112
4113         if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT))
4114                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4115                                                     elems->vht_cap_elem,
4116                                                     link_sta);
4117
4118         if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4119             elems->he_cap) {
4120                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
4121                                                   elems->he_cap,
4122                                                   elems->he_cap_len,
4123                                                   elems->he_6ghz_capa,
4124                                                   link_sta);
4125
4126                 bss_conf->he_support = link_sta->pub->he_cap.has_he;
4127                 if (elems->rsnx && elems->rsnx_len &&
4128                     (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
4129                     wiphy_ext_feature_isset(local->hw.wiphy,
4130                                             NL80211_EXT_FEATURE_PROTECTED_TWT))
4131                         bss_conf->twt_protected = true;
4132                 else
4133                         bss_conf->twt_protected = false;
4134
4135                 *changed |= ieee80211_recalc_twt_req(sdata, sband, link,
4136                                                      link_sta, elems);
4137
4138                 if (elems->eht_operation && elems->eht_cap &&
4139                     !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
4140                         ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
4141                                                             elems->he_cap,
4142                                                             elems->he_cap_len,
4143                                                             elems->eht_cap,
4144                                                             elems->eht_cap_len,
4145                                                             link_sta);
4146
4147                         bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
4148                 } else {
4149                         bss_conf->eht_support = false;
4150                 }
4151         } else {
4152                 bss_conf->he_support = false;
4153                 bss_conf->twt_requester = false;
4154                 bss_conf->twt_protected = false;
4155                 bss_conf->eht_support = false;
4156         }
4157
4158         bss_conf->twt_broadcast =
4159                 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
4160
4161         if (bss_conf->he_support) {
4162                 bss_conf->he_bss_color.color =
4163                         le32_get_bits(elems->he_operation->he_oper_params,
4164                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
4165                 bss_conf->he_bss_color.partial =
4166                         le32_get_bits(elems->he_operation->he_oper_params,
4167                                       IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
4168                 bss_conf->he_bss_color.enabled =
4169                         !le32_get_bits(elems->he_operation->he_oper_params,
4170                                        IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
4171
4172                 if (bss_conf->he_bss_color.enabled)
4173                         *changed |= BSS_CHANGED_HE_BSS_COLOR;
4174
4175                 bss_conf->htc_trig_based_pkt_ext =
4176                         le32_get_bits(elems->he_operation->he_oper_params,
4177                                       IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
4178                 bss_conf->frame_time_rts_th =
4179                         le32_get_bits(elems->he_operation->he_oper_params,
4180                                       IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
4181
4182                 bss_conf->uora_exists = !!elems->uora_element;
4183                 if (elems->uora_element)
4184                         bss_conf->uora_ocw_range = elems->uora_element[0];
4185
4186                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
4187                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
4188                 /* TODO: OPEN: what happens if BSS color disable is set? */
4189         }
4190
4191         if (cbss->transmitted_bss) {
4192                 bss_conf->nontransmitted = true;
4193                 ether_addr_copy(bss_conf->transmitter_bssid,
4194                                 cbss->transmitted_bss->bssid);
4195                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
4196                 bss_conf->bssid_index = cbss->bssid_index;
4197         }
4198
4199         /*
4200          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
4201          * in their association response, so ignore that data for our own
4202          * configuration. If it changed since the last beacon, we'll get the
4203          * next beacon and update then.
4204          */
4205
4206         /*
4207          * If an operating mode notification IE is present, override the
4208          * NSS calculation (that would be done in rate_control_rate_init())
4209          * and use the # of streams from that element.
4210          */
4211         if (elems->opmode_notif &&
4212             !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
4213                 u8 nss;
4214
4215                 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
4216                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
4217                 nss += 1;
4218                 link_sta->pub->rx_nss = nss;
4219         }
4220
4221         /*
4222          * Always handle WMM once after association regardless
4223          * of the first value the AP uses. Setting -1 here has
4224          * that effect because the AP values is an unsigned
4225          * 4-bit value.
4226          */
4227         link->u.mgd.wmm_last_param_set = -1;
4228         link->u.mgd.mu_edca_last_param_set = -1;
4229
4230         if (link->u.mgd.disable_wmm_tracking) {
4231                 ieee80211_set_wmm_default(link, false, false);
4232         } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param,
4233                                              elems->wmm_param_len,
4234                                              elems->mu_edca_param_set)) {
4235                 /* still enable QoS since we might have HT/VHT */
4236                 ieee80211_set_wmm_default(link, false, true);
4237                 /* disable WMM tracking in this case to disable
4238                  * tracking WMM parameter changes in the beacon if
4239                  * the parameters weren't actually valid. Doing so
4240                  * avoids changing parameters very strangely when
4241                  * the AP is going back and forth between valid and
4242                  * invalid parameters.
4243                  */
4244                 link->u.mgd.disable_wmm_tracking = true;
4245         }
4246
4247         if (elems->max_idle_period_ie) {
4248                 bss_conf->max_idle_period =
4249                         le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
4250                 bss_conf->protected_keep_alive =
4251                         !!(elems->max_idle_period_ie->idle_options &
4252                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
4253                 *changed |= BSS_CHANGED_KEEP_ALIVE;
4254         } else {
4255                 bss_conf->max_idle_period = 0;
4256                 bss_conf->protected_keep_alive = false;
4257         }
4258
4259         /* set assoc capability (AID was already set earlier),
4260          * ieee80211_set_associated() will tell the driver */
4261         bss_conf->assoc_capability = capab_info;
4262
4263         ret = true;
4264 out:
4265         kfree(elems);
4266         kfree(bss_ies);
4267         return ret;
4268 }
4269
4270 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
4271                                         struct sta_info *sta,
4272                                         struct link_sta_info *link_sta,
4273                                         struct cfg80211_bss *cbss)
4274 {
4275         struct ieee80211_sub_if_data *sdata = link->sdata;
4276         struct ieee80211_local *local = sdata->local;
4277         struct ieee80211_bss *bss = (void *)cbss->priv;
4278         u32 rates = 0, basic_rates = 0;
4279         bool have_higher_than_11mbit = false;
4280         int min_rate = INT_MAX, min_rate_index = -1;
4281         /* this is clearly wrong for MLO but we'll just remove it later */
4282         int shift = ieee80211_vif_get_shift(&sdata->vif);
4283         struct ieee80211_supported_band *sband;
4284
4285         memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
4286         memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN);
4287
4288         /* TODO: S1G Basic Rate Set is expressed elsewhere */
4289         if (cbss->channel->band == NL80211_BAND_S1GHZ) {
4290                 ieee80211_s1g_sta_rate_init(sta);
4291                 return 0;
4292         }
4293
4294         sband = local->hw.wiphy->bands[cbss->channel->band];
4295
4296         ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
4297                             &rates, &basic_rates, &have_higher_than_11mbit,
4298                             &min_rate, &min_rate_index, shift);
4299
4300         /*
4301          * This used to be a workaround for basic rates missing
4302          * in the association response frame. Now that we no
4303          * longer use the basic rates from there, it probably
4304          * doesn't happen any more, but keep the workaround so
4305          * in case some *other* APs are buggy in different ways
4306          * we can connect -- with a warning.
4307          * Allow this workaround only in case the AP provided at least
4308          * one rate.
4309          */
4310         if (min_rate_index < 0) {
4311                 link_info(link, "No legacy rates in association response\n");
4312                 return -EINVAL;
4313         } else if (!basic_rates) {
4314                 link_info(link, "No basic rates, using min rate instead\n");
4315                 basic_rates = BIT(min_rate_index);
4316         }
4317
4318         if (rates)
4319                 link_sta->pub->supp_rates[cbss->channel->band] = rates;
4320         else
4321                 link_info(link, "No rates found, keeping mandatory only\n");
4322
4323         link->conf->basic_rates = basic_rates;
4324
4325         /* cf. IEEE 802.11 9.2.12 */
4326         link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
4327                                    have_higher_than_11mbit;
4328
4329         return 0;
4330 }
4331
4332 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
4333                                   struct cfg80211_bss *cbss)
4334 {
4335         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4336         const struct element *ht_cap_elem, *vht_cap_elem;
4337         const struct cfg80211_bss_ies *ies;
4338         const struct ieee80211_ht_cap *ht_cap;
4339         const struct ieee80211_vht_cap *vht_cap;
4340         const struct ieee80211_he_cap_elem *he_cap;
4341         const struct element *he_cap_elem;
4342         u16 mcs_80_map, mcs_160_map;
4343         int i, mcs_nss_size;
4344         bool support_160;
4345         u8 chains = 1;
4346
4347         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)
4348                 return chains;
4349
4350         ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
4351         if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
4352                 ht_cap = (void *)ht_cap_elem->data;
4353                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4354                 /*
4355                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4356                  *       "Tx Unequal Modulation Supported" fields.
4357                  */
4358         }
4359
4360         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
4361                 return chains;
4362
4363         vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
4364         if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
4365                 u8 nss;
4366                 u16 tx_mcs_map;
4367
4368                 vht_cap = (void *)vht_cap_elem->data;
4369                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4370                 for (nss = 8; nss > 0; nss--) {
4371                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4372                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4373                                 break;
4374                 }
4375                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4376                 chains = max(chains, nss);
4377         }
4378
4379         if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE)
4380                 return chains;
4381
4382         ies = rcu_dereference(cbss->ies);
4383         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4384                                              ies->data, ies->len);
4385
4386         if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
4387                 return chains;
4388
4389         /* skip one byte ext_tag_id */
4390         he_cap = (void *)(he_cap_elem->data + 1);
4391         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4392
4393         /* invalid HE IE */
4394         if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
4395                 return chains;
4396
4397         /* mcs_nss is right after he_cap info */
4398         he_mcs_nss_supp = (void *)(he_cap + 1);
4399
4400         mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4401
4402         for (i = 7; i >= 0; i--) {
4403                 u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
4404
4405                 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4406                         chains = max_t(u8, chains, i + 1);
4407                         break;
4408                 }
4409         }
4410
4411         support_160 = he_cap->phy_cap_info[0] &
4412                       IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
4413
4414         if (!support_160)
4415                 return chains;
4416
4417         mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
4418         for (i = 7; i >= 0; i--) {
4419                 u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
4420
4421                 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4422                         chains = max_t(u8, chains, i + 1);
4423                         break;
4424                 }
4425         }
4426
4427         return chains;
4428 }
4429
4430 static bool
4431 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4432                                      const struct cfg80211_bss_ies *ies,
4433                                      const struct ieee80211_he_operation *he_op)
4434 {
4435         const struct element *he_cap_elem;
4436         const struct ieee80211_he_cap_elem *he_cap;
4437         struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4438         u16 mcs_80_map_tx, mcs_80_map_rx;
4439         u16 ap_min_req_set;
4440         int mcs_nss_size;
4441         int nss;
4442
4443         he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4444                                              ies->data, ies->len);
4445
4446         if (!he_cap_elem)
4447                 return false;
4448
4449         /* invalid HE IE */
4450         if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
4451                 sdata_info(sdata,
4452                            "Invalid HE elem, Disable HE\n");
4453                 return false;
4454         }
4455
4456         /* skip one byte ext_tag_id */
4457         he_cap = (void *)(he_cap_elem->data + 1);
4458         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4459
4460         /* invalid HE IE */
4461         if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
4462                 sdata_info(sdata,
4463                            "Invalid HE elem with nss size, Disable HE\n");
4464                 return false;
4465         }
4466
4467         /* mcs_nss is right after he_cap info */
4468         he_mcs_nss_supp = (void *)(he_cap + 1);
4469
4470         mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4471         mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
4472
4473         /* P802.11-REVme/D0.3
4474          * 27.1.1 Introduction to the HE PHY
4475          * ...
4476          * An HE STA shall support the following features:
4477          * ...
4478          * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
4479          * supported channel widths for HE SU PPDUs
4480          */
4481         if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4482             (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
4483                 sdata_info(sdata,
4484                            "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
4485                            mcs_80_map_tx, mcs_80_map_rx);
4486                 return false;
4487         }
4488
4489         if (!he_op)
4490                 return true;
4491
4492         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4493
4494         /*
4495          * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4496          * zeroes, which is nonsense, and completely inconsistent with itself
4497          * (it doesn't have 8 streams). Accept the settings in this case anyway.
4498          */
4499         if (!ap_min_req_set)
4500                 return true;
4501
4502         /* make sure the AP is consistent with itself
4503          *
4504          * P802.11-REVme/D0.3
4505          * 26.17.1 Basic HE BSS operation
4506          *
4507          * A STA that is operating in an HE BSS shall be able to receive and
4508          * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
4509          * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
4510          * MLME-START.request primitive and shall be able to receive at each of
4511          * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
4512          * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
4513          * primitive
4514          */
4515         for (nss = 8; nss > 0; nss--) {
4516                 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4517                 u8 ap_rx_val;
4518                 u8 ap_tx_val;
4519
4520                 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4521                         continue;
4522
4523                 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
4524                 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
4525
4526                 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4527                     ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4528                     ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
4529                         sdata_info(sdata,
4530                                    "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
4531                                    nss, ap_rx_val, ap_rx_val, ap_op_val);
4532                         return false;
4533                 }
4534         }
4535
4536         return true;
4537 }
4538
4539 static bool
4540 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4541                                     struct ieee80211_supported_band *sband,
4542                                     const struct ieee80211_he_operation *he_op)
4543 {
4544         const struct ieee80211_sta_he_cap *sta_he_cap =
4545                 ieee80211_get_he_iftype_cap(sband,
4546                                             ieee80211_vif_type_p2p(&sdata->vif));
4547         u16 ap_min_req_set;
4548         int i;
4549
4550         if (!sta_he_cap || !he_op)
4551                 return false;
4552
4553         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4554
4555         /*
4556          * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4557          * zeroes, which is nonsense, and completely inconsistent with itself
4558          * (it doesn't have 8 streams). Accept the settings in this case anyway.
4559          */
4560         if (!ap_min_req_set)
4561                 return true;
4562
4563         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4564         for (i = 0; i < 3; i++) {
4565                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4566                         &sta_he_cap->he_mcs_nss_supp;
4567                 u16 sta_mcs_map_rx =
4568                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4569                 u16 sta_mcs_map_tx =
4570                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4571                 u8 nss;
4572                 bool verified = true;
4573
4574                 /*
4575                  * For each band there is a maximum of 8 spatial streams
4576                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4577                  * of 2 bits per NSS (1-8), with the values defined in enum
4578                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4579                  * capabilities aren't less than the AP's minimum requirements
4580                  * for this HE BSS per SS.
4581                  * It is enough to find one such band that meets the reqs.
4582                  */
4583                 for (nss = 8; nss > 0; nss--) {
4584                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4585                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4586                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4587
4588                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4589                                 continue;
4590
4591                         /*
4592                          * Make sure the HE AP doesn't require MCSs that aren't
4593                          * supported by the client as required by spec
4594                          *
4595                          * P802.11-REVme/D0.3
4596                          * 26.17.1 Basic HE BSS operation
4597                          *
4598                          * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
4599                          * a BSS, unless it supports (i.e., is able to both transmit and
4600                          * receive using) all of the <HE-MCS, NSS> tuples in the basic
4601                          * HE-MCS and NSS set.
4602                          */
4603                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4604                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4605                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4606                                 verified = false;
4607                                 break;
4608                         }
4609                 }
4610
4611                 if (verified)
4612                         return true;
4613         }
4614
4615         /* If here, STA doesn't meet AP's HE min requirements */
4616         return false;
4617 }
4618
4619 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4620                                   struct ieee80211_link_data *link,
4621                                   struct cfg80211_bss *cbss,
4622                                   ieee80211_conn_flags_t *conn_flags)
4623 {
4624         struct ieee80211_local *local = sdata->local;
4625         const struct ieee80211_ht_cap *ht_cap = NULL;
4626         const struct ieee80211_ht_operation *ht_oper = NULL;
4627         const struct ieee80211_vht_operation *vht_oper = NULL;
4628         const struct ieee80211_he_operation *he_oper = NULL;
4629         const struct ieee80211_eht_operation *eht_oper = NULL;
4630         const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
4631         struct ieee80211_supported_band *sband;
4632         struct cfg80211_chan_def chandef;
4633         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4634         bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
4635         struct ieee80211_bss *bss = (void *)cbss->priv;
4636         struct ieee80211_elems_parse_params parse_params = {
4637                 .bss = cbss,
4638                 .link_id = -1,
4639                 .from_ap = true,
4640         };
4641         struct ieee802_11_elems *elems;
4642         const struct cfg80211_bss_ies *ies;
4643         int ret;
4644         u32 i;
4645         bool have_80mhz;
4646
4647         rcu_read_lock();
4648
4649         ies = rcu_dereference(cbss->ies);
4650         parse_params.start = ies->data;
4651         parse_params.len = ies->len;
4652         elems = ieee802_11_parse_elems_full(&parse_params);
4653         if (!elems) {
4654                 rcu_read_unlock();
4655                 return -ENOMEM;
4656         }
4657
4658         sband = local->hw.wiphy->bands[cbss->channel->band];
4659
4660         *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ |
4661                          IEEE80211_CONN_DISABLE_80P80MHZ |
4662                          IEEE80211_CONN_DISABLE_160MHZ);
4663
4664         /* disable HT/VHT/HE if we don't support them */
4665         if (!sband->ht_cap.ht_supported && !is_6ghz) {
4666                 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
4667                 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4668                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4669                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4670                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4671         }
4672
4673         if (!sband->vht_cap.vht_supported && is_5ghz) {
4674                 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
4675                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4676                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4677                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4678         }
4679
4680         if (!ieee80211_get_he_iftype_cap(sband,
4681                                          ieee80211_vif_type_p2p(&sdata->vif))) {
4682                 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
4683                 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4684                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4685         }
4686
4687         if (!ieee80211_get_eht_iftype_cap(sband,
4688                                           ieee80211_vif_type_p2p(&sdata->vif))) {
4689                 mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
4690                 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4691         }
4692
4693         if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) {
4694                 ht_oper = elems->ht_operation;
4695                 ht_cap = elems->ht_cap_elem;
4696
4697                 if (!ht_cap) {
4698                         *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4699                         ht_oper = NULL;
4700                 }
4701         }
4702
4703         if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) {
4704                 vht_oper = elems->vht_operation;
4705                 if (vht_oper && !ht_oper) {
4706                         vht_oper = NULL;
4707                         sdata_info(sdata,
4708                                    "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4709                         *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4710                         *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4711                         *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4712                         *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4713                 }
4714
4715                 if (!elems->vht_cap_elem) {
4716                         *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4717                         vht_oper = NULL;
4718                 }
4719         }
4720
4721         if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) {
4722                 he_oper = elems->he_operation;
4723
4724                 if (link && is_6ghz) {
4725                         struct ieee80211_bss_conf *bss_conf;
4726                         u8 j = 0;
4727
4728                         bss_conf = link->conf;
4729
4730                         if (elems->pwr_constr_elem)
4731                                 bss_conf->pwr_reduction = *elems->pwr_constr_elem;
4732
4733                         BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
4734                                      ARRAY_SIZE(elems->tx_pwr_env));
4735
4736                         for (i = 0; i < elems->tx_pwr_env_num; i++) {
4737                                 if (elems->tx_pwr_env_len[i] >
4738                                     sizeof(bss_conf->tx_pwr_env[j]))
4739                                         continue;
4740
4741                                 bss_conf->tx_pwr_env_num++;
4742                                 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
4743                                        elems->tx_pwr_env_len[i]);
4744                                 j++;
4745                         }
4746                 }
4747
4748                 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
4749                     !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
4750                         *conn_flags |= IEEE80211_CONN_DISABLE_HE |
4751                                        IEEE80211_CONN_DISABLE_EHT;
4752         }
4753
4754         /*
4755          * EHT requires HE to be supported as well. Specifically for 6 GHz
4756          * channels, the operation channel information can only be deduced from
4757          * both the 6 GHz operation information (from the HE operation IE) and
4758          * EHT operation.
4759          */
4760         if (!(*conn_flags &
4761                         (IEEE80211_CONN_DISABLE_HE |
4762                          IEEE80211_CONN_DISABLE_EHT)) &&
4763             he_oper) {
4764                 const struct cfg80211_bss_ies *cbss_ies;
4765                 const u8 *eht_oper_ie;
4766
4767                 cbss_ies = rcu_dereference(cbss->ies);
4768                 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
4769                                                    cbss_ies->data, cbss_ies->len);
4770                 if (eht_oper_ie && eht_oper_ie[1] >=
4771                     1 + sizeof(struct ieee80211_eht_operation))
4772                         eht_oper = (void *)(eht_oper_ie + 3);
4773                 else
4774                         eht_oper = NULL;
4775         }
4776
4777         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4778         have_80mhz = false;
4779         for (i = 0; i < sband->n_channels; i++) {
4780                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4781                                                 IEEE80211_CHAN_NO_80MHZ))
4782                         continue;
4783
4784                 have_80mhz = true;
4785                 break;
4786         }
4787
4788         if (!have_80mhz) {
4789                 sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
4790                 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4791         }
4792
4793         if (sband->band == NL80211_BAND_S1GHZ) {
4794                 s1g_oper = elems->s1g_oper;
4795                 if (!s1g_oper)
4796                         sdata_info(sdata,
4797                                    "AP missing S1G operation element?\n");
4798         }
4799
4800         *conn_flags |=
4801                 ieee80211_determine_chantype(sdata, link, *conn_flags,
4802                                              sband,
4803                                              cbss->channel,
4804                                              bss->vht_cap_info,
4805                                              ht_oper, vht_oper,
4806                                              he_oper, eht_oper,
4807                                              s1g_oper,
4808                                              &chandef, false);
4809
4810         if (link)
4811                 link->needed_rx_chains =
4812                         min(ieee80211_max_rx_chains(link, cbss),
4813                             local->rx_chains);
4814
4815         rcu_read_unlock();
4816         /* the element data was RCU protected so no longer valid anyway */
4817         kfree(elems);
4818         elems = NULL;
4819
4820         if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) {
4821                 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
4822                 return -EINVAL;
4823         }
4824
4825         if (!link)
4826                 return 0;
4827
4828         /* will change later if needed */
4829         link->smps_mode = IEEE80211_SMPS_OFF;
4830
4831         mutex_lock(&local->mtx);
4832         /*
4833          * If this fails (possibly due to channel context sharing
4834          * on incompatible channels, e.g. 80+80 and 160 sharing the
4835          * same control channel) try to use a smaller bandwidth.
4836          */
4837         ret = ieee80211_link_use_channel(link, &chandef,
4838                                          IEEE80211_CHANCTX_SHARED);
4839
4840         /* don't downgrade for 5 and 10 MHz channels, though. */
4841         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4842             chandef.width == NL80211_CHAN_WIDTH_10)
4843                 goto out;
4844
4845         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4846                 *conn_flags |=
4847                         ieee80211_chandef_downgrade(&chandef);
4848                 ret = ieee80211_link_use_channel(link, &chandef,
4849                                                  IEEE80211_CHANCTX_SHARED);
4850         }
4851  out:
4852         mutex_unlock(&local->mtx);
4853         return ret;
4854 }
4855
4856 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4857                                u8 *dtim_count, u8 *dtim_period)
4858 {
4859         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4860         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4861                                          ies->len);
4862         const struct ieee80211_tim_ie *tim = NULL;
4863         const struct ieee80211_bssid_index *idx;
4864         bool valid = tim_ie && tim_ie[1] >= 2;
4865
4866         if (valid)
4867                 tim = (void *)(tim_ie + 2);
4868
4869         if (dtim_count)
4870                 *dtim_count = valid ? tim->dtim_count : 0;
4871
4872         if (dtim_period)
4873                 *dtim_period = valid ? tim->dtim_period : 0;
4874
4875         /* Check if value is overridden by non-transmitted profile */
4876         if (!idx_ie || idx_ie[1] < 3)
4877                 return valid;
4878
4879         idx = (void *)(idx_ie + 2);
4880
4881         if (dtim_count)
4882                 *dtim_count = idx->dtim_count;
4883
4884         if (dtim_period)
4885                 *dtim_period = idx->dtim_period;
4886
4887         return true;
4888 }
4889
4890 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
4891                                     struct ieee80211_mgmt *mgmt,
4892                                     struct ieee802_11_elems *elems,
4893                                     const u8 *elem_start, unsigned int elem_len)
4894 {
4895         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4896         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
4897         struct ieee80211_local *local = sdata->local;
4898         unsigned int link_id;
4899         struct sta_info *sta;
4900         u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
4901         u16 valid_links = 0;
4902         int err;
4903
4904         mutex_lock(&sdata->local->sta_mtx);
4905         /*
4906          * station info was already allocated and inserted before
4907          * the association and should be available to us
4908          */
4909         sta = sta_info_get(sdata, assoc_data->ap_addr);
4910         if (WARN_ON(!sta))
4911                 goto out_err;
4912
4913         if (sdata->vif.valid_links) {
4914                 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4915                         if (!assoc_data->link[link_id].bss)
4916                                 continue;
4917                         valid_links |= BIT(link_id);
4918
4919                         if (link_id != assoc_data->assoc_link_id) {
4920                                 err = ieee80211_sta_allocate_link(sta, link_id);
4921                                 if (err)
4922                                         goto out_err;
4923                         }
4924                 }
4925
4926                 ieee80211_vif_set_links(sdata, valid_links);
4927         }
4928
4929         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4930                 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
4931                 struct ieee80211_link_data *link;
4932                 struct link_sta_info *link_sta;
4933
4934                 if (!cbss)
4935                         continue;
4936
4937                 link = sdata_dereference(sdata->link[link_id], sdata);
4938                 if (WARN_ON(!link))
4939                         goto out_err;
4940
4941                 if (sdata->vif.valid_links)
4942                         link_info(link,
4943                                   "local address %pM, AP link address %pM%s\n",
4944                                   link->conf->addr,
4945                                   assoc_data->link[link_id].bss->bssid,
4946                                   link_id == assoc_data->assoc_link_id ?
4947                                         " (assoc)" : "");
4948
4949                 link_sta = rcu_dereference_protected(sta->link[link_id],
4950                                                      lockdep_is_held(&local->sta_mtx));
4951                 if (WARN_ON(!link_sta))
4952                         goto out_err;
4953
4954                 if (!link->u.mgd.have_beacon) {
4955                         const struct cfg80211_bss_ies *ies;
4956
4957                         rcu_read_lock();
4958                         ies = rcu_dereference(cbss->beacon_ies);
4959                         if (ies)
4960                                 link->u.mgd.have_beacon = true;
4961                         else
4962                                 ies = rcu_dereference(cbss->ies);
4963                         ieee80211_get_dtim(ies,
4964                                            &link->conf->sync_dtim_count,
4965                                            &link->u.mgd.dtim_period);
4966                         link->conf->beacon_int = cbss->beacon_interval;
4967                         rcu_read_unlock();
4968                 }
4969
4970                 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
4971
4972                 if (link_id != assoc_data->assoc_link_id) {
4973                         err = ieee80211_prep_channel(sdata, link, cbss,
4974                                                      &link->u.mgd.conn_flags);
4975                         if (err) {
4976                                 link_info(link, "prep_channel failed\n");
4977                                 goto out_err;
4978                         }
4979                 }
4980
4981                 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
4982                                                    assoc_data->link[link_id].bss);
4983                 if (err)
4984                         goto out_err;
4985
4986                 if (!ieee80211_assoc_config_link(link, link_sta,
4987                                                  assoc_data->link[link_id].bss,
4988                                                  mgmt, elem_start, elem_len,
4989                                                  &changed[link_id]))
4990                         goto out_err;
4991
4992                 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
4993                         valid_links &= ~BIT(link_id);
4994                         ieee80211_sta_remove_link(sta, link_id);
4995                         continue;
4996                 }
4997
4998                 if (link_id != assoc_data->assoc_link_id) {
4999                         err = ieee80211_sta_activate_link(sta, link_id);
5000                         if (err)
5001                                 goto out_err;
5002                 }
5003         }
5004
5005         /* links might have changed due to rejected ones, set them again */
5006         ieee80211_vif_set_links(sdata, valid_links);
5007
5008         rate_control_rate_init(sta);
5009
5010         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
5011                 set_sta_flag(sta, WLAN_STA_MFP);
5012                 sta->sta.mfp = true;
5013         } else {
5014                 sta->sta.mfp = false;
5015         }
5016
5017         ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab,
5018                                               elems->ext_capab_len);
5019
5020         sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
5021                        local->hw.queues >= IEEE80211_NUM_ACS;
5022
5023         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
5024         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
5025                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
5026         if (err) {
5027                 sdata_info(sdata,
5028                            "failed to move station %pM to desired state\n",
5029                            sta->sta.addr);
5030                 WARN_ON(__sta_info_destroy(sta));
5031                 goto out_err;
5032         }
5033
5034         if (sdata->wdev.use_4addr)
5035                 drv_sta_set_4addr(local, sdata, &sta->sta, true);
5036
5037         mutex_unlock(&sdata->local->sta_mtx);
5038
5039         ieee80211_set_associated(sdata, assoc_data, changed);
5040
5041         /*
5042          * If we're using 4-addr mode, let the AP know that we're
5043          * doing so, so that it can create the STA VLAN on its side
5044          */
5045         if (ifmgd->use_4addr)
5046                 ieee80211_send_4addr_nullfunc(local, sdata);
5047
5048         /*
5049          * Start timer to probe the connection to the AP now.
5050          * Also start the timer that will detect beacon loss.
5051          */
5052         ieee80211_sta_reset_beacon_monitor(sdata);
5053         ieee80211_sta_reset_conn_monitor(sdata);
5054
5055         return true;
5056 out_err:
5057         eth_zero_addr(sdata->vif.cfg.ap_addr);
5058         mutex_unlock(&sdata->local->sta_mtx);
5059         return false;
5060 }
5061
5062 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
5063                                          struct ieee80211_mgmt *mgmt,
5064                                          size_t len)
5065 {
5066         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5067         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5068         u16 capab_info, status_code, aid;
5069         struct ieee80211_elems_parse_params parse_params = {
5070                 .bss = NULL,
5071                 .link_id = -1,
5072                 .from_ap = true,
5073         };
5074         struct ieee802_11_elems *elems;
5075         int ac;
5076         const u8 *elem_start;
5077         unsigned int elem_len;
5078         bool reassoc;
5079         struct ieee80211_event event = {
5080                 .type = MLME_EVENT,
5081                 .u.mlme.data = ASSOC_EVENT,
5082         };
5083         struct ieee80211_prep_tx_info info = {};
5084         struct cfg80211_rx_assoc_resp resp = {
5085                 .uapsd_queues = -1,
5086         };
5087         u8 ap_mld_addr[ETH_ALEN] __aligned(2);
5088         unsigned int link_id;
5089
5090         sdata_assert_lock(sdata);
5091
5092         if (!assoc_data)
5093                 return;
5094
5095         if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) ||
5096             !ether_addr_equal(assoc_data->ap_addr, mgmt->sa))
5097                 return;
5098
5099         /*
5100          * AssocResp and ReassocResp have identical structure, so process both
5101          * of them in this function.
5102          */
5103
5104         if (len < 24 + 6)
5105                 return;
5106
5107         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
5108         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
5109         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
5110         if (assoc_data->s1g)
5111                 elem_start = mgmt->u.s1g_assoc_resp.variable;
5112         else
5113                 elem_start = mgmt->u.assoc_resp.variable;
5114
5115         /*
5116          * Note: this may not be perfect, AP might misbehave - if
5117          * anyone needs to rely on perfect complete notification
5118          * with the exact right subtype, then we need to track what
5119          * we actually transmitted.
5120          */
5121         info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
5122                                  IEEE80211_STYPE_ASSOC_REQ;
5123
5124         if (assoc_data->fils_kek_len &&
5125             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
5126                 return;
5127
5128         elem_len = len - (elem_start - (u8 *)mgmt);
5129         parse_params.start = elem_start;
5130         parse_params.len = elem_len;
5131         elems = ieee802_11_parse_elems_full(&parse_params);
5132         if (!elems)
5133                 goto notify_driver;
5134
5135         if (elems->aid_resp)
5136                 aid = le16_to_cpu(elems->aid_resp->aid);
5137         else if (assoc_data->s1g)
5138                 aid = 0; /* TODO */
5139         else
5140                 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
5141
5142         /*
5143          * The 5 MSB of the AID field are reserved
5144          * (802.11-2016 9.4.1.8 AID field)
5145          */
5146         aid &= 0x7ff;
5147
5148         sdata_info(sdata,
5149                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
5150                    reassoc ? "Rea" : "A", assoc_data->ap_addr,
5151                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
5152
5153         ifmgd->broken_ap = false;
5154
5155         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
5156             elems->timeout_int &&
5157             elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
5158                 u32 tu, ms;
5159
5160                 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr,
5161                                         le32_to_cpu(elems->timeout_int->value));
5162
5163                 tu = le32_to_cpu(elems->timeout_int->value);
5164                 ms = tu * 1024 / 1000;
5165                 sdata_info(sdata,
5166                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
5167                            assoc_data->ap_addr, tu, ms);
5168                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
5169                 assoc_data->timeout_started = true;
5170                 if (ms > IEEE80211_ASSOC_TIMEOUT)
5171                         run_again(sdata, assoc_data->timeout);
5172                 goto notify_driver;
5173         }
5174
5175         if (status_code != WLAN_STATUS_SUCCESS) {
5176                 sdata_info(sdata, "%pM denied association (code=%d)\n",
5177                            assoc_data->ap_addr, status_code);
5178                 event.u.mlme.status = MLME_DENIED;
5179                 event.u.mlme.reason = status_code;
5180                 drv_event_callback(sdata->local, sdata, &event);
5181         } else {
5182                 if (aid == 0 || aid > IEEE80211_MAX_AID) {
5183                         sdata_info(sdata,
5184                                    "invalid AID value %d (out of range), turn off PS\n",
5185                                    aid);
5186                         aid = 0;
5187                         ifmgd->broken_ap = true;
5188                 }
5189
5190                 if (sdata->vif.valid_links) {
5191                         if (!elems->multi_link) {
5192                                 sdata_info(sdata,
5193                                            "MLO association with %pM but no multi-link element in response!\n",
5194                                            assoc_data->ap_addr);
5195                                 goto abandon_assoc;
5196                         }
5197
5198                         if (le16_get_bits(elems->multi_link->control,
5199                                           IEEE80211_ML_CONTROL_TYPE) !=
5200                                         IEEE80211_ML_CONTROL_TYPE_BASIC) {
5201                                 sdata_info(sdata,
5202                                            "bad multi-link element (control=0x%x)\n",
5203                                            le16_to_cpu(elems->multi_link->control));
5204                                 goto abandon_assoc;
5205                         } else {
5206                                 struct ieee80211_mle_basic_common_info *common;
5207
5208                                 common = (void *)elems->multi_link->variable;
5209
5210                                 if (memcmp(assoc_data->ap_addr,
5211                                            common->mld_mac_addr, ETH_ALEN)) {
5212                                         sdata_info(sdata,
5213                                                    "AP MLD MAC address mismatch: got %pM expected %pM\n",
5214                                                    common->mld_mac_addr,
5215                                                    assoc_data->ap_addr);
5216                                         goto abandon_assoc;
5217                                 }
5218                         }
5219                 }
5220
5221                 sdata->vif.cfg.aid = aid;
5222
5223                 if (!ieee80211_assoc_success(sdata, mgmt, elems,
5224                                              elem_start, elem_len)) {
5225                         /* oops -- internal error -- send timeout for now */
5226                         ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
5227                         goto notify_driver;
5228                 }
5229                 event.u.mlme.status = MLME_SUCCESS;
5230                 drv_event_callback(sdata->local, sdata, &event);
5231                 sdata_info(sdata, "associated\n");
5232
5233                 info.success = 1;
5234         }
5235
5236         for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5237                 struct ieee80211_link_data *link;
5238
5239                 link = sdata_dereference(sdata->link[link_id], sdata);
5240                 if (!link)
5241                         continue;
5242
5243                 if (!assoc_data->link[link_id].bss)
5244                         continue;
5245
5246                 resp.links[link_id].bss = assoc_data->link[link_id].bss;
5247                 resp.links[link_id].addr = link->conf->addr;
5248                 resp.links[link_id].status = assoc_data->link[link_id].status;
5249
5250                 /* get uapsd queues configuration - same for all links */
5251                 resp.uapsd_queues = 0;
5252                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
5253                         if (link->tx_conf[ac].uapsd)
5254                                 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
5255         }
5256
5257         if (sdata->vif.valid_links) {
5258                 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr);
5259                 resp.ap_mld_addr = ap_mld_addr;
5260         }
5261
5262         ieee80211_destroy_assoc_data(sdata,
5263                                      status_code == WLAN_STATUS_SUCCESS ?
5264                                         ASSOC_SUCCESS :
5265                                         ASSOC_REJECTED);
5266
5267         resp.buf = (u8 *)mgmt;
5268         resp.len = len;
5269         resp.req_ies = ifmgd->assoc_req_ies;
5270         resp.req_ies_len = ifmgd->assoc_req_ies_len;
5271         cfg80211_rx_assoc_resp(sdata->dev, &resp);
5272 notify_driver:
5273         drv_mgd_complete_tx(sdata->local, sdata, &info);
5274         kfree(elems);
5275         return;
5276 abandon_assoc:
5277         ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
5278         goto notify_driver;
5279 }
5280
5281 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
5282                                   struct ieee80211_mgmt *mgmt, size_t len,
5283                                   struct ieee80211_rx_status *rx_status)
5284 {
5285         struct ieee80211_sub_if_data *sdata = link->sdata;
5286         struct ieee80211_local *local = sdata->local;
5287         struct ieee80211_bss *bss;
5288         struct ieee80211_channel *channel;
5289
5290         sdata_assert_lock(sdata);
5291
5292         channel = ieee80211_get_channel_khz(local->hw.wiphy,
5293                                         ieee80211_rx_status_to_khz(rx_status));
5294         if (!channel)
5295                 return;
5296
5297         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
5298         if (bss) {
5299                 link->conf->beacon_rate = bss->beacon_rate;
5300                 ieee80211_rx_bss_put(local, bss);
5301         }
5302 }
5303
5304
5305 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
5306                                          struct sk_buff *skb)
5307 {
5308         struct ieee80211_sub_if_data *sdata = link->sdata;
5309         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5310         struct ieee80211_if_managed *ifmgd;
5311         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
5312         struct ieee80211_channel *channel;
5313         size_t baselen, len = skb->len;
5314
5315         ifmgd = &sdata->u.mgd;
5316
5317         sdata_assert_lock(sdata);
5318
5319         /*
5320          * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
5321          * "If a 6 GHz AP receives a Probe Request frame  and responds with
5322          * a Probe Response frame [..], the Address 1 field of the Probe
5323          * Response frame shall be set to the broadcast address [..]"
5324          * So, on 6GHz band we should also accept broadcast responses.
5325          */
5326         channel = ieee80211_get_channel(sdata->local->hw.wiphy,
5327                                         rx_status->freq);
5328         if (!channel)
5329                 return;
5330
5331         if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
5332             (channel->band != NL80211_BAND_6GHZ ||
5333              !is_broadcast_ether_addr(mgmt->da)))
5334                 return; /* ignore ProbeResp to foreign address */
5335
5336         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
5337         if (baselen > len)
5338                 return;
5339
5340         ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5341
5342         if (ifmgd->associated &&
5343             ether_addr_equal(mgmt->bssid, link->u.mgd.bssid))
5344                 ieee80211_reset_ap_probe(sdata);
5345 }
5346
5347 /*
5348  * This is the canonical list of information elements we care about,
5349  * the filter code also gives us all changes to the Microsoft OUI
5350  * (00:50:F2) vendor IE which is used for WMM which we need to track,
5351  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
5352  * changes to requested client power.
5353  *
5354  * We implement beacon filtering in software since that means we can
5355  * avoid processing the frame here and in cfg80211, and userspace
5356  * will not be able to tell whether the hardware supports it or not.
5357  *
5358  * XXX: This list needs to be dynamic -- userspace needs to be able to
5359  *      add items it requires. It also needs to be able to tell us to
5360  *      look out for other vendor IEs.
5361  */
5362 static const u64 care_about_ies =
5363         (1ULL << WLAN_EID_COUNTRY) |
5364         (1ULL << WLAN_EID_ERP_INFO) |
5365         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
5366         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
5367         (1ULL << WLAN_EID_HT_CAPABILITY) |
5368         (1ULL << WLAN_EID_HT_OPERATION) |
5369         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
5370
5371 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
5372                                         struct ieee80211_if_managed *ifmgd,
5373                                         struct ieee80211_bss_conf *bss_conf,
5374                                         struct ieee80211_local *local,
5375                                         struct ieee80211_rx_status *rx_status)
5376 {
5377         struct ieee80211_sub_if_data *sdata = link->sdata;
5378
5379         /* Track average RSSI from the Beacon frames of the current AP */
5380
5381         if (!link->u.mgd.tracking_signal_avg) {
5382                 link->u.mgd.tracking_signal_avg = true;
5383                 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal);
5384                 link->u.mgd.last_cqm_event_signal = 0;
5385                 link->u.mgd.count_beacon_signal = 1;
5386                 link->u.mgd.last_ave_beacon_signal = 0;
5387         } else {
5388                 link->u.mgd.count_beacon_signal++;
5389         }
5390
5391         ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal,
5392                                -rx_status->signal);
5393
5394         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
5395             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5396                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5397                 int last_sig = link->u.mgd.last_ave_beacon_signal;
5398                 struct ieee80211_event event = {
5399                         .type = RSSI_EVENT,
5400                 };
5401
5402                 /*
5403                  * if signal crosses either of the boundaries, invoke callback
5404                  * with appropriate parameters
5405                  */
5406                 if (sig > ifmgd->rssi_max_thold &&
5407                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
5408                         link->u.mgd.last_ave_beacon_signal = sig;
5409                         event.u.rssi.data = RSSI_EVENT_HIGH;
5410                         drv_event_callback(local, sdata, &event);
5411                 } else if (sig < ifmgd->rssi_min_thold &&
5412                            (last_sig >= ifmgd->rssi_max_thold ||
5413                            last_sig == 0)) {
5414                         link->u.mgd.last_ave_beacon_signal = sig;
5415                         event.u.rssi.data = RSSI_EVENT_LOW;
5416                         drv_event_callback(local, sdata, &event);
5417                 }
5418         }
5419
5420         if (bss_conf->cqm_rssi_thold &&
5421             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
5422             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
5423                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5424                 int last_event = link->u.mgd.last_cqm_event_signal;
5425                 int thold = bss_conf->cqm_rssi_thold;
5426                 int hyst = bss_conf->cqm_rssi_hyst;
5427
5428                 if (sig < thold &&
5429                     (last_event == 0 || sig < last_event - hyst)) {
5430                         link->u.mgd.last_cqm_event_signal = sig;
5431                         ieee80211_cqm_rssi_notify(
5432                                 &sdata->vif,
5433                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5434                                 sig, GFP_KERNEL);
5435                 } else if (sig > thold &&
5436                            (last_event == 0 || sig > last_event + hyst)) {
5437                         link->u.mgd.last_cqm_event_signal = sig;
5438                         ieee80211_cqm_rssi_notify(
5439                                 &sdata->vif,
5440                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5441                                 sig, GFP_KERNEL);
5442                 }
5443         }
5444
5445         if (bss_conf->cqm_rssi_low &&
5446             link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5447                 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5448                 int last_event = link->u.mgd.last_cqm_event_signal;
5449                 int low = bss_conf->cqm_rssi_low;
5450                 int high = bss_conf->cqm_rssi_high;
5451
5452                 if (sig < low &&
5453                     (last_event == 0 || last_event >= low)) {
5454                         link->u.mgd.last_cqm_event_signal = sig;
5455                         ieee80211_cqm_rssi_notify(
5456                                 &sdata->vif,
5457                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5458                                 sig, GFP_KERNEL);
5459                 } else if (sig > high &&
5460                            (last_event == 0 || last_event <= high)) {
5461                         link->u.mgd.last_cqm_event_signal = sig;
5462                         ieee80211_cqm_rssi_notify(
5463                                 &sdata->vif,
5464                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5465                                 sig, GFP_KERNEL);
5466                 }
5467         }
5468 }
5469
5470 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
5471                                     struct cfg80211_bss *bss)
5472 {
5473         if (ether_addr_equal(tx_bssid, bss->bssid))
5474                 return true;
5475         if (!bss->transmitted_bss)
5476                 return false;
5477         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
5478 }
5479
5480 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
5481                                      struct ieee80211_hdr *hdr, size_t len,
5482                                      struct ieee80211_rx_status *rx_status)
5483 {
5484         struct ieee80211_sub_if_data *sdata = link->sdata;
5485         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5486         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5487         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
5488         struct ieee80211_mgmt *mgmt = (void *) hdr;
5489         size_t baselen;
5490         struct ieee802_11_elems *elems;
5491         struct ieee80211_local *local = sdata->local;
5492         struct ieee80211_chanctx_conf *chanctx_conf;
5493         struct ieee80211_supported_band *sband;
5494         struct ieee80211_channel *chan;
5495         struct link_sta_info *link_sta;
5496         struct sta_info *sta;
5497         u32 changed = 0;
5498         bool erp_valid;
5499         u8 erp_value = 0;
5500         u32 ncrc = 0;
5501         u8 *bssid, *variable = mgmt->u.beacon.variable;
5502         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
5503         struct ieee80211_elems_parse_params parse_params = {
5504                 .link_id = -1,
5505                 .from_ap = true,
5506         };
5507
5508         sdata_assert_lock(sdata);
5509
5510         /* Process beacon from the current BSS */
5511         bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
5512         if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
5513                 struct ieee80211_ext *ext = (void *) mgmt;
5514
5515                 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
5516                         variable = ext->u.s1g_short_beacon.variable;
5517                 else
5518                         variable = ext->u.s1g_beacon.variable;
5519         }
5520
5521         baselen = (u8 *) variable - (u8 *) mgmt;
5522         if (baselen > len)
5523                 return;
5524
5525         parse_params.start = variable;
5526         parse_params.len = len - baselen;
5527
5528         rcu_read_lock();
5529         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
5530         if (!chanctx_conf) {
5531                 rcu_read_unlock();
5532                 return;
5533         }
5534
5535         if (ieee80211_rx_status_to_khz(rx_status) !=
5536             ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
5537                 rcu_read_unlock();
5538                 return;
5539         }
5540         chan = chanctx_conf->def.chan;
5541         rcu_read_unlock();
5542
5543         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
5544             !WARN_ON(sdata->vif.valid_links) &&
5545             ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) {
5546                 parse_params.bss = ifmgd->assoc_data->link[0].bss;
5547                 elems = ieee802_11_parse_elems_full(&parse_params);
5548                 if (!elems)
5549                         return;
5550
5551                 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5552
5553                 if (elems->dtim_period)
5554                         link->u.mgd.dtim_period = elems->dtim_period;
5555                 link->u.mgd.have_beacon = true;
5556                 ifmgd->assoc_data->need_beacon = false;
5557                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5558                         link->conf->sync_tsf =
5559                                 le64_to_cpu(mgmt->u.beacon.timestamp);
5560                         link->conf->sync_device_ts =
5561                                 rx_status->device_timestamp;
5562                         link->conf->sync_dtim_count = elems->dtim_count;
5563                 }
5564
5565                 if (elems->mbssid_config_ie)
5566                         bss_conf->profile_periodicity =
5567                                 elems->mbssid_config_ie->profile_periodicity;
5568                 else
5569                         bss_conf->profile_periodicity = 0;
5570
5571                 if (elems->ext_capab_len >= 11 &&
5572                     (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5573                         bss_conf->ema_ap = true;
5574                 else
5575                         bss_conf->ema_ap = false;
5576
5577                 /* continue assoc process */
5578                 ifmgd->assoc_data->timeout = jiffies;
5579                 ifmgd->assoc_data->timeout_started = true;
5580                 run_again(sdata, ifmgd->assoc_data->timeout);
5581                 kfree(elems);
5582                 return;
5583         }
5584
5585         if (!ifmgd->associated ||
5586             !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss))
5587                 return;
5588         bssid = link->u.mgd.bssid;
5589
5590         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
5591                 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
5592                                             local, rx_status);
5593
5594         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
5595                 mlme_dbg_ratelimited(sdata,
5596                                      "cancelling AP probe due to a received beacon\n");
5597                 ieee80211_reset_ap_probe(sdata);
5598         }
5599
5600         /*
5601          * Push the beacon loss detection into the future since
5602          * we are processing a beacon from the AP just now.
5603          */
5604         ieee80211_sta_reset_beacon_monitor(sdata);
5605
5606         /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
5607          * element (which carries the beacon interval). Don't forget to add a
5608          * bit to care_about_ies[] above if mac80211 is interested in a
5609          * changing S1G element.
5610          */
5611         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5612                 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
5613         parse_params.bss = link->u.mgd.bss;
5614         parse_params.filter = care_about_ies;
5615         parse_params.crc = ncrc;
5616         elems = ieee802_11_parse_elems_full(&parse_params);
5617         if (!elems)
5618                 return;
5619         ncrc = elems->crc;
5620
5621         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
5622             ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) {
5623                 if (local->hw.conf.dynamic_ps_timeout > 0) {
5624                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
5625                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
5626                                 ieee80211_hw_config(local,
5627                                                     IEEE80211_CONF_CHANGE_PS);
5628                         }
5629                         ieee80211_send_nullfunc(local, sdata, false);
5630                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
5631                         local->pspolling = true;
5632
5633                         /*
5634                          * Here is assumed that the driver will be
5635                          * able to send ps-poll frame and receive a
5636                          * response even though power save mode is
5637                          * enabled, but some drivers might require
5638                          * to disable power save here. This needs
5639                          * to be investigated.
5640                          */
5641                         ieee80211_send_pspoll(local, sdata);
5642                 }
5643         }
5644
5645         if (sdata->vif.p2p ||
5646             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
5647                 struct ieee80211_p2p_noa_attr noa = {};
5648                 int ret;
5649
5650                 ret = cfg80211_get_p2p_attr(variable,
5651                                             len - baselen,
5652                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
5653                                             (u8 *) &noa, sizeof(noa));
5654                 if (ret >= 2) {
5655                         if (link->u.mgd.p2p_noa_index != noa.index) {
5656                                 /* valid noa_attr and index changed */
5657                                 link->u.mgd.p2p_noa_index = noa.index;
5658                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
5659                                 changed |= BSS_CHANGED_P2P_PS;
5660                                 /*
5661                                  * make sure we update all information, the CRC
5662                                  * mechanism doesn't look at P2P attributes.
5663                                  */
5664                                 link->u.mgd.beacon_crc_valid = false;
5665                         }
5666                 } else if (link->u.mgd.p2p_noa_index != -1) {
5667                         /* noa_attr not found and we had valid noa_attr before */
5668                         link->u.mgd.p2p_noa_index = -1;
5669                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
5670                         changed |= BSS_CHANGED_P2P_PS;
5671                         link->u.mgd.beacon_crc_valid = false;
5672                 }
5673         }
5674
5675         if (link->u.mgd.csa_waiting_bcn)
5676                 ieee80211_chswitch_post_beacon(link);
5677
5678         /*
5679          * Update beacon timing and dtim count on every beacon appearance. This
5680          * will allow the driver to use the most updated values. Do it before
5681          * comparing this one with last received beacon.
5682          * IMPORTANT: These parameters would possibly be out of sync by the time
5683          * the driver will use them. The synchronized view is currently
5684          * guaranteed only in certain callbacks.
5685          */
5686         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
5687             !ieee80211_is_s1g_beacon(hdr->frame_control)) {
5688                 link->conf->sync_tsf =
5689                         le64_to_cpu(mgmt->u.beacon.timestamp);
5690                 link->conf->sync_device_ts =
5691                         rx_status->device_timestamp;
5692                 link->conf->sync_dtim_count = elems->dtim_count;
5693         }
5694
5695         if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) ||
5696             ieee80211_is_s1g_short_beacon(mgmt->frame_control))
5697                 goto free;
5698         link->u.mgd.beacon_crc = ncrc;
5699         link->u.mgd.beacon_crc_valid = true;
5700
5701         ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5702
5703         ieee80211_sta_process_chanswitch(link, rx_status->mactime,
5704                                          rx_status->device_timestamp,
5705                                          elems, true);
5706
5707         if (!link->u.mgd.disable_wmm_tracking &&
5708             ieee80211_sta_wmm_params(local, link, elems->wmm_param,
5709                                      elems->wmm_param_len,
5710                                      elems->mu_edca_param_set))
5711                 changed |= BSS_CHANGED_QOS;
5712
5713         /*
5714          * If we haven't had a beacon before, tell the driver about the
5715          * DTIM period (and beacon timing if desired) now.
5716          */
5717         if (!link->u.mgd.have_beacon) {
5718                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
5719                 bss_conf->dtim_period = elems->dtim_period ?: 1;
5720
5721                 changed |= BSS_CHANGED_BEACON_INFO;
5722                 link->u.mgd.have_beacon = true;
5723
5724                 mutex_lock(&local->iflist_mtx);
5725                 ieee80211_recalc_ps(local);
5726                 mutex_unlock(&local->iflist_mtx);
5727
5728                 ieee80211_recalc_ps_vif(sdata);
5729         }
5730
5731         if (elems->erp_info) {
5732                 erp_valid = true;
5733                 erp_value = elems->erp_info[0];
5734         } else {
5735                 erp_valid = false;
5736         }
5737
5738         if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5739                 changed |= ieee80211_handle_bss_capability(link,
5740                                 le16_to_cpu(mgmt->u.beacon.capab_info),
5741                                 erp_valid, erp_value);
5742
5743         mutex_lock(&local->sta_mtx);
5744         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
5745         if (WARN_ON(!sta)) {
5746                 mutex_unlock(&local->sta_mtx);
5747                 goto free;
5748         }
5749         link_sta = rcu_dereference_protected(sta->link[link->link_id],
5750                                              lockdep_is_held(&local->sta_mtx));
5751         if (WARN_ON(!link_sta)) {
5752                 mutex_unlock(&local->sta_mtx);
5753                 goto free;
5754         }
5755
5756         if (WARN_ON(!link->conf->chandef.chan))
5757                 goto free;
5758
5759         sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
5760
5761         changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems);
5762
5763         if (ieee80211_config_bw(link, elems->ht_cap_elem,
5764                                 elems->vht_cap_elem, elems->ht_operation,
5765                                 elems->vht_operation, elems->he_operation,
5766                                 elems->eht_operation,
5767                                 elems->s1g_oper, bssid, &changed)) {
5768                 mutex_unlock(&local->sta_mtx);
5769                 sdata_info(sdata,
5770                            "failed to follow AP %pM bandwidth change, disconnect\n",
5771                            bssid);
5772                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5773                                        WLAN_REASON_DEAUTH_LEAVING,
5774                                        true, deauth_buf);
5775                 ieee80211_report_disconnect(sdata, deauth_buf,
5776                                             sizeof(deauth_buf), true,
5777                                             WLAN_REASON_DEAUTH_LEAVING,
5778                                             false);
5779                 goto free;
5780         }
5781
5782         if (sta && elems->opmode_notif)
5783                 ieee80211_vht_handle_opmode(sdata, link_sta,
5784                                             *elems->opmode_notif,
5785                                             rx_status->band);
5786         mutex_unlock(&local->sta_mtx);
5787
5788         changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
5789                                                elems->country_elem,
5790                                                elems->country_elem_len,
5791                                                elems->pwr_constr_elem,
5792                                                elems->cisco_dtpc_elem);
5793
5794         ieee80211_link_info_change_notify(sdata, link, changed);
5795 free:
5796         kfree(elems);
5797 }
5798
5799 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
5800                                  struct sk_buff *skb)
5801 {
5802         struct ieee80211_link_data *link = &sdata->deflink;
5803         struct ieee80211_rx_status *rx_status;
5804         struct ieee80211_hdr *hdr;
5805         u16 fc;
5806
5807         rx_status = (struct ieee80211_rx_status *) skb->cb;
5808         hdr = (struct ieee80211_hdr *) skb->data;
5809         fc = le16_to_cpu(hdr->frame_control);
5810
5811         sdata_lock(sdata);
5812         switch (fc & IEEE80211_FCTL_STYPE) {
5813         case IEEE80211_STYPE_S1G_BEACON:
5814                 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
5815                 break;
5816         }
5817         sdata_unlock(sdata);
5818 }
5819
5820 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
5821                                   struct sk_buff *skb)
5822 {
5823         struct ieee80211_link_data *link = &sdata->deflink;
5824         struct ieee80211_rx_status *rx_status;
5825         struct ieee80211_mgmt *mgmt;
5826         u16 fc;
5827         int ies_len;
5828
5829         rx_status = (struct ieee80211_rx_status *) skb->cb;
5830         mgmt = (struct ieee80211_mgmt *) skb->data;
5831         fc = le16_to_cpu(mgmt->frame_control);
5832
5833         sdata_lock(sdata);
5834
5835         if (rx_status->link_valid) {
5836                 link = sdata_dereference(sdata->link[rx_status->link_id],
5837                                          sdata);
5838                 if (!link)
5839                         goto out;
5840         }
5841
5842         switch (fc & IEEE80211_FCTL_STYPE) {
5843         case IEEE80211_STYPE_BEACON:
5844                 ieee80211_rx_mgmt_beacon(link, (void *)mgmt,
5845                                          skb->len, rx_status);
5846                 break;
5847         case IEEE80211_STYPE_PROBE_RESP:
5848                 ieee80211_rx_mgmt_probe_resp(link, skb);
5849                 break;
5850         case IEEE80211_STYPE_AUTH:
5851                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
5852                 break;
5853         case IEEE80211_STYPE_DEAUTH:
5854                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
5855                 break;
5856         case IEEE80211_STYPE_DISASSOC:
5857                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
5858                 break;
5859         case IEEE80211_STYPE_ASSOC_RESP:
5860         case IEEE80211_STYPE_REASSOC_RESP:
5861                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
5862                 break;
5863         case IEEE80211_STYPE_ACTION:
5864                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
5865                         struct ieee802_11_elems *elems;
5866
5867                         ies_len = skb->len -
5868                                   offsetof(struct ieee80211_mgmt,
5869                                            u.action.u.chan_switch.variable);
5870
5871                         if (ies_len < 0)
5872                                 break;
5873
5874                         /* CSA IE cannot be overridden, no need for BSSID */
5875                         elems = ieee802_11_parse_elems(
5876                                         mgmt->u.action.u.chan_switch.variable,
5877                                         ies_len, true, NULL);
5878
5879                         if (elems && !elems->parse_error)
5880                                 ieee80211_sta_process_chanswitch(link,
5881                                                                  rx_status->mactime,
5882                                                                  rx_status->device_timestamp,
5883                                                                  elems, false);
5884                         kfree(elems);
5885                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
5886                         struct ieee802_11_elems *elems;
5887
5888                         ies_len = skb->len -
5889                                   offsetof(struct ieee80211_mgmt,
5890                                            u.action.u.ext_chan_switch.variable);
5891
5892                         if (ies_len < 0)
5893                                 break;
5894
5895                         /*
5896                          * extended CSA IE can't be overridden, no need for
5897                          * BSSID
5898                          */
5899                         elems = ieee802_11_parse_elems(
5900                                         mgmt->u.action.u.ext_chan_switch.variable,
5901                                         ies_len, true, NULL);
5902
5903                         if (elems && !elems->parse_error) {
5904                                 /* for the handling code pretend it was an IE */
5905                                 elems->ext_chansw_ie =
5906                                         &mgmt->u.action.u.ext_chan_switch.data;
5907
5908                                 ieee80211_sta_process_chanswitch(link,
5909                                                                  rx_status->mactime,
5910                                                                  rx_status->device_timestamp,
5911                                                                  elems, false);
5912                         }
5913
5914                         kfree(elems);
5915                 }
5916                 break;
5917         }
5918 out:
5919         sdata_unlock(sdata);
5920 }
5921
5922 static void ieee80211_sta_timer(struct timer_list *t)
5923 {
5924         struct ieee80211_sub_if_data *sdata =
5925                 from_timer(sdata, t, u.mgd.timer);
5926
5927         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
5928 }
5929
5930 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
5931                                    u8 reason, bool tx)
5932 {
5933         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5934
5935         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
5936                                tx, frame_buf);
5937
5938         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5939                                     reason, false);
5940 }
5941
5942 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
5943 {
5944         struct ieee80211_local *local = sdata->local;
5945         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5946         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
5947         u32 tx_flags = 0;
5948         u16 trans = 1;
5949         u16 status = 0;
5950         struct ieee80211_prep_tx_info info = {
5951                 .subtype = IEEE80211_STYPE_AUTH,
5952         };
5953
5954         sdata_assert_lock(sdata);
5955
5956         if (WARN_ON_ONCE(!auth_data))
5957                 return -EINVAL;
5958
5959         auth_data->tries++;
5960
5961         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
5962                 sdata_info(sdata, "authentication with %pM timed out\n",
5963                            auth_data->ap_addr);
5964
5965                 /*
5966                  * Most likely AP is not in the range so remove the
5967                  * bss struct for that AP.
5968                  */
5969                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
5970
5971                 return -ETIMEDOUT;
5972         }
5973
5974         if (auth_data->algorithm == WLAN_AUTH_SAE)
5975                 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
5976
5977         drv_mgd_prepare_tx(local, sdata, &info);
5978
5979         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
5980                    auth_data->ap_addr, auth_data->tries,
5981                    IEEE80211_AUTH_MAX_TRIES);
5982
5983         auth_data->expected_transaction = 2;
5984
5985         if (auth_data->algorithm == WLAN_AUTH_SAE) {
5986                 trans = auth_data->sae_trans;
5987                 status = auth_data->sae_status;
5988                 auth_data->expected_transaction = trans;
5989         }
5990
5991         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
5992                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
5993                            IEEE80211_TX_INTFL_MLME_CONN_TX;
5994
5995         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
5996                             auth_data->data, auth_data->data_len,
5997                             auth_data->ap_addr, auth_data->ap_addr,
5998                             NULL, 0, 0, tx_flags);
5999
6000         if (tx_flags == 0) {
6001                 if (auth_data->algorithm == WLAN_AUTH_SAE)
6002                         auth_data->timeout = jiffies +
6003                                 IEEE80211_AUTH_TIMEOUT_SAE;
6004                 else
6005                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
6006         } else {
6007                 auth_data->timeout =
6008                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
6009         }
6010
6011         auth_data->timeout_started = true;
6012         run_again(sdata, auth_data->timeout);
6013
6014         return 0;
6015 }
6016
6017 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
6018 {
6019         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
6020         struct ieee80211_local *local = sdata->local;
6021         int ret;
6022
6023         sdata_assert_lock(sdata);
6024
6025         assoc_data->tries++;
6026         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
6027                 sdata_info(sdata, "association with %pM timed out\n",
6028                            assoc_data->ap_addr);
6029
6030                 /*
6031                  * Most likely AP is not in the range so remove the
6032                  * bss struct for that AP.
6033                  */
6034                 cfg80211_unlink_bss(local->hw.wiphy,
6035                                     assoc_data->link[assoc_data->assoc_link_id].bss);
6036
6037                 return -ETIMEDOUT;
6038         }
6039
6040         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
6041                    assoc_data->ap_addr, assoc_data->tries,
6042                    IEEE80211_ASSOC_MAX_TRIES);
6043         ret = ieee80211_send_assoc(sdata);
6044         if (ret)
6045                 return ret;
6046
6047         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6048                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
6049                 assoc_data->timeout_started = true;
6050                 run_again(sdata, assoc_data->timeout);
6051         } else {
6052                 assoc_data->timeout =
6053                         round_jiffies_up(jiffies +
6054                                          IEEE80211_ASSOC_TIMEOUT_LONG);
6055                 assoc_data->timeout_started = true;
6056                 run_again(sdata, assoc_data->timeout);
6057         }
6058
6059         return 0;
6060 }
6061
6062 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
6063                                   __le16 fc, bool acked)
6064 {
6065         struct ieee80211_local *local = sdata->local;
6066
6067         sdata->u.mgd.status_fc = fc;
6068         sdata->u.mgd.status_acked = acked;
6069         sdata->u.mgd.status_received = true;
6070
6071         ieee80211_queue_work(&local->hw, &sdata->work);
6072 }
6073
6074 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
6075 {
6076         struct ieee80211_local *local = sdata->local;
6077         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6078
6079         sdata_lock(sdata);
6080
6081         if (ifmgd->status_received) {
6082                 __le16 fc = ifmgd->status_fc;
6083                 bool status_acked = ifmgd->status_acked;
6084
6085                 ifmgd->status_received = false;
6086                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
6087                         if (status_acked) {
6088                                 if (ifmgd->auth_data->algorithm ==
6089                                     WLAN_AUTH_SAE)
6090                                         ifmgd->auth_data->timeout =
6091                                                 jiffies +
6092                                                 IEEE80211_AUTH_TIMEOUT_SAE;
6093                                 else
6094                                         ifmgd->auth_data->timeout =
6095                                                 jiffies +
6096                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
6097                                 run_again(sdata, ifmgd->auth_data->timeout);
6098                         } else {
6099                                 ifmgd->auth_data->timeout = jiffies - 1;
6100                         }
6101                         ifmgd->auth_data->timeout_started = true;
6102                 } else if (ifmgd->assoc_data &&
6103                            (ieee80211_is_assoc_req(fc) ||
6104                             ieee80211_is_reassoc_req(fc))) {
6105                         if (status_acked) {
6106                                 ifmgd->assoc_data->timeout =
6107                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
6108                                 run_again(sdata, ifmgd->assoc_data->timeout);
6109                         } else {
6110                                 ifmgd->assoc_data->timeout = jiffies - 1;
6111                         }
6112                         ifmgd->assoc_data->timeout_started = true;
6113                 }
6114         }
6115
6116         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
6117             time_after(jiffies, ifmgd->auth_data->timeout)) {
6118                 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
6119                         /*
6120                          * ok ... we waited for assoc or continuation but
6121                          * userspace didn't do it, so kill the auth data
6122                          */
6123                         ieee80211_destroy_auth_data(sdata, false);
6124                 } else if (ieee80211_auth(sdata)) {
6125                         u8 ap_addr[ETH_ALEN];
6126                         struct ieee80211_event event = {
6127                                 .type = MLME_EVENT,
6128                                 .u.mlme.data = AUTH_EVENT,
6129                                 .u.mlme.status = MLME_TIMEOUT,
6130                         };
6131
6132                         memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN);
6133
6134                         ieee80211_destroy_auth_data(sdata, false);
6135
6136                         cfg80211_auth_timeout(sdata->dev, ap_addr);
6137                         drv_event_callback(sdata->local, sdata, &event);
6138                 }
6139         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
6140                 run_again(sdata, ifmgd->auth_data->timeout);
6141
6142         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
6143             time_after(jiffies, ifmgd->assoc_data->timeout)) {
6144                 if ((ifmgd->assoc_data->need_beacon &&
6145                      !sdata->deflink.u.mgd.have_beacon) ||
6146                     ieee80211_do_assoc(sdata)) {
6147                         struct ieee80211_event event = {
6148                                 .type = MLME_EVENT,
6149                                 .u.mlme.data = ASSOC_EVENT,
6150                                 .u.mlme.status = MLME_TIMEOUT,
6151                         };
6152
6153                         ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
6154                         drv_event_callback(sdata->local, sdata, &event);
6155                 }
6156         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
6157                 run_again(sdata, ifmgd->assoc_data->timeout);
6158
6159         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
6160             ifmgd->associated) {
6161                 u8 *bssid = sdata->deflink.u.mgd.bssid;
6162                 int max_tries;
6163
6164                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6165                         max_tries = max_nullfunc_tries;
6166                 else
6167                         max_tries = max_probe_tries;
6168
6169                 /* ACK received for nullfunc probing frame */
6170                 if (!ifmgd->probe_send_count)
6171                         ieee80211_reset_ap_probe(sdata);
6172                 else if (ifmgd->nullfunc_failed) {
6173                         if (ifmgd->probe_send_count < max_tries) {
6174                                 mlme_dbg(sdata,
6175                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
6176                                          bssid, ifmgd->probe_send_count,
6177                                          max_tries);
6178                                 ieee80211_mgd_probe_ap_send(sdata);
6179                         } else {
6180                                 mlme_dbg(sdata,
6181                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
6182                                          bssid);
6183                                 ieee80211_sta_connection_lost(sdata,
6184                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
6185                                         false);
6186                         }
6187                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
6188                         run_again(sdata, ifmgd->probe_timeout);
6189                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6190                         mlme_dbg(sdata,
6191                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
6192                                  bssid, probe_wait_ms);
6193                         ieee80211_sta_connection_lost(sdata,
6194                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6195                 } else if (ifmgd->probe_send_count < max_tries) {
6196                         mlme_dbg(sdata,
6197                                  "No probe response from AP %pM after %dms, try %d/%i\n",
6198                                  bssid, probe_wait_ms,
6199                                  ifmgd->probe_send_count, max_tries);
6200                         ieee80211_mgd_probe_ap_send(sdata);
6201                 } else {
6202                         /*
6203                          * We actually lost the connection ... or did we?
6204                          * Let's make sure!
6205                          */
6206                         mlme_dbg(sdata,
6207                                  "No probe response from AP %pM after %dms, disconnecting.\n",
6208                                  bssid, probe_wait_ms);
6209
6210                         ieee80211_sta_connection_lost(sdata,
6211                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6212                 }
6213         }
6214
6215         sdata_unlock(sdata);
6216 }
6217
6218 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
6219 {
6220         struct ieee80211_sub_if_data *sdata =
6221                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
6222
6223         if (WARN_ON(sdata->vif.valid_links))
6224                 return;
6225
6226         if (sdata->vif.bss_conf.csa_active &&
6227             !sdata->deflink.u.mgd.csa_waiting_bcn)
6228                 return;
6229
6230         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
6231                 return;
6232
6233         sdata->u.mgd.connection_loss = false;
6234         ieee80211_queue_work(&sdata->local->hw,
6235                              &sdata->u.mgd.beacon_connection_loss_work);
6236 }
6237
6238 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
6239 {
6240         struct ieee80211_sub_if_data *sdata =
6241                 from_timer(sdata, t, u.mgd.conn_mon_timer);
6242         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6243         struct ieee80211_local *local = sdata->local;
6244         struct sta_info *sta;
6245         unsigned long timeout;
6246
6247         if (WARN_ON(sdata->vif.valid_links))
6248                 return;
6249
6250         if (sdata->vif.bss_conf.csa_active &&
6251             !sdata->deflink.u.mgd.csa_waiting_bcn)
6252                 return;
6253
6254         sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
6255         if (!sta)
6256                 return;
6257
6258         timeout = sta->deflink.status_stats.last_ack;
6259         if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
6260                 timeout = sta->deflink.rx_stats.last_rx;
6261         timeout += IEEE80211_CONNECTION_IDLE_TIME;
6262
6263         /* If timeout is after now, then update timer to fire at
6264          * the later date, but do not actually probe at this time.
6265          */
6266         if (time_is_after_jiffies(timeout)) {
6267                 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
6268                 return;
6269         }
6270
6271         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
6272 }
6273
6274 static void ieee80211_sta_monitor_work(struct work_struct *work)
6275 {
6276         struct ieee80211_sub_if_data *sdata =
6277                 container_of(work, struct ieee80211_sub_if_data,
6278                              u.mgd.monitor_work);
6279
6280         ieee80211_mgd_probe_ap(sdata, false);
6281 }
6282
6283 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
6284 {
6285         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
6286                 __ieee80211_stop_poll(sdata);
6287
6288                 /* let's probe the connection once */
6289                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
6290                         ieee80211_queue_work(&sdata->local->hw,
6291                                              &sdata->u.mgd.monitor_work);
6292         }
6293 }
6294
6295 #ifdef CONFIG_PM
6296 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
6297 {
6298         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6299         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6300
6301         sdata_lock(sdata);
6302
6303         if (ifmgd->auth_data || ifmgd->assoc_data) {
6304                 const u8 *ap_addr = ifmgd->auth_data ?
6305                                 ifmgd->auth_data->ap_addr :
6306                                 ifmgd->assoc_data->ap_addr;
6307
6308                 /*
6309                  * If we are trying to authenticate / associate while suspending,
6310                  * cfg80211 won't know and won't actually abort those attempts,
6311                  * thus we need to do that ourselves.
6312                  */
6313                 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr,
6314                                                IEEE80211_STYPE_DEAUTH,
6315                                                WLAN_REASON_DEAUTH_LEAVING,
6316                                                false, frame_buf);
6317                 if (ifmgd->assoc_data)
6318                         ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
6319                 if (ifmgd->auth_data)
6320                         ieee80211_destroy_auth_data(sdata, false);
6321                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
6322                                       IEEE80211_DEAUTH_FRAME_LEN,
6323                                       false);
6324         }
6325
6326         /* This is a bit of a hack - we should find a better and more generic
6327          * solution to this. Normally when suspending, cfg80211 will in fact
6328          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
6329          * auth (not so important) or assoc (this is the problem) process.
6330          *
6331          * As a consequence, it can happen that we are in the process of both
6332          * associating and suspending, and receive an association response
6333          * after cfg80211 has checked if it needs to disconnect, but before
6334          * we actually set the flag to drop incoming frames. This will then
6335          * cause the workqueue flush to process the association response in
6336          * the suspend, resulting in a successful association just before it
6337          * tries to remove the interface from the driver, which now though
6338          * has a channel context assigned ... this results in issues.
6339          *
6340          * To work around this (for now) simply deauth here again if we're
6341          * now connected.
6342          */
6343         if (ifmgd->associated && !sdata->local->wowlan) {
6344                 u8 bssid[ETH_ALEN];
6345                 struct cfg80211_deauth_request req = {
6346                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
6347                         .bssid = bssid,
6348                 };
6349
6350                 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
6351                 ieee80211_mgd_deauth(sdata, &req);
6352         }
6353
6354         sdata_unlock(sdata);
6355 }
6356 #endif
6357
6358 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
6359 {
6360         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6361
6362         sdata_lock(sdata);
6363         if (!ifmgd->associated) {
6364                 sdata_unlock(sdata);
6365                 return;
6366         }
6367
6368         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
6369                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
6370                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
6371                 ieee80211_sta_connection_lost(sdata,
6372                                               WLAN_REASON_UNSPECIFIED,
6373                                               true);
6374                 sdata_unlock(sdata);
6375                 return;
6376         }
6377
6378         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
6379                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
6380                 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
6381                 ieee80211_sta_connection_lost(sdata,
6382                                               WLAN_REASON_UNSPECIFIED,
6383                                               true);
6384                 sdata_unlock(sdata);
6385                 return;
6386         }
6387
6388         sdata_unlock(sdata);
6389 }
6390
6391 static void ieee80211_request_smps_mgd_work(struct work_struct *work)
6392 {
6393         struct ieee80211_link_data *link =
6394                 container_of(work, struct ieee80211_link_data,
6395                              u.mgd.request_smps_work);
6396
6397         sdata_lock(link->sdata);
6398         __ieee80211_request_smps_mgd(link->sdata, link,
6399                                      link->u.mgd.driver_smps_mode);
6400         sdata_unlock(link->sdata);
6401 }
6402
6403 /* interface setup */
6404 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
6405 {
6406         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6407
6408         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
6409         INIT_WORK(&ifmgd->beacon_connection_loss_work,
6410                   ieee80211_beacon_connection_loss_work);
6411         INIT_WORK(&ifmgd->csa_connection_drop_work,
6412                   ieee80211_csa_connection_drop_work);
6413         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
6414                           ieee80211_tdls_peer_del_work);
6415         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
6416         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
6417         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
6418         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
6419                           ieee80211_sta_handle_tspec_ac_params_wk);
6420
6421         ifmgd->flags = 0;
6422         ifmgd->powersave = sdata->wdev.ps;
6423         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
6424         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
6425         /* Setup TDLS data */
6426         spin_lock_init(&ifmgd->teardown_lock);
6427         ifmgd->teardown_skb = NULL;
6428         ifmgd->orig_teardown_skb = NULL;
6429 }
6430
6431 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
6432 {
6433         struct ieee80211_sub_if_data *sdata = link->sdata;
6434         struct ieee80211_local *local = sdata->local;
6435         unsigned int link_id = link->link_id;
6436
6437         link->u.mgd.p2p_noa_index = -1;
6438         link->u.mgd.conn_flags = 0;
6439         link->conf->bssid = link->u.mgd.bssid;
6440
6441         INIT_WORK(&link->u.mgd.request_smps_work,
6442                   ieee80211_request_smps_mgd_work);
6443         if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
6444                 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
6445         else
6446                 link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
6447
6448         INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work);
6449         timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0);
6450
6451         if (sdata->u.mgd.assoc_data)
6452                 ether_addr_copy(link->conf->addr,
6453                                 sdata->u.mgd.assoc_data->link[link_id].addr);
6454         else if (!is_valid_ether_addr(link->conf->addr))
6455                 eth_random_addr(link->conf->addr);
6456 }
6457
6458 /* scan finished notification */
6459 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
6460 {
6461         struct ieee80211_sub_if_data *sdata;
6462
6463         /* Restart STA timers */
6464         rcu_read_lock();
6465         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
6466                 if (ieee80211_sdata_running(sdata))
6467                         ieee80211_restart_sta_timer(sdata);
6468         }
6469         rcu_read_unlock();
6470 }
6471
6472 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
6473                                      struct cfg80211_bss *cbss, s8 link_id,
6474                                      const u8 *ap_mld_addr, bool assoc,
6475                                      bool override)
6476 {
6477         struct ieee80211_local *local = sdata->local;
6478         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6479         struct ieee80211_bss *bss = (void *)cbss->priv;
6480         struct sta_info *new_sta = NULL;
6481         struct ieee80211_link_data *link;
6482         bool have_sta = false;
6483         bool mlo;
6484         int err;
6485
6486         if (link_id >= 0) {
6487                 mlo = true;
6488                 if (WARN_ON(!ap_mld_addr))
6489                         return -EINVAL;
6490                 err = ieee80211_vif_set_links(sdata, BIT(link_id));
6491         } else {
6492                 if (WARN_ON(ap_mld_addr))
6493                         return -EINVAL;
6494                 ap_mld_addr = cbss->bssid;
6495                 err = ieee80211_vif_set_links(sdata, 0);
6496                 link_id = 0;
6497                 mlo = false;
6498         }
6499
6500         if (err)
6501                 return err;
6502
6503         link = sdata_dereference(sdata->link[link_id], sdata);
6504         if (WARN_ON(!link)) {
6505                 err = -ENOLINK;
6506                 goto out_err;
6507         }
6508
6509         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
6510                 err = -EINVAL;
6511                 goto out_err;
6512         }
6513
6514         /* If a reconfig is happening, bail out */
6515         if (local->in_reconfig) {
6516                 err = -EBUSY;
6517                 goto out_err;
6518         }
6519
6520         if (assoc) {
6521                 rcu_read_lock();
6522                 have_sta = sta_info_get(sdata, ap_mld_addr);
6523                 rcu_read_unlock();
6524         }
6525
6526         if (!have_sta) {
6527                 if (mlo)
6528                         new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr,
6529                                                            link_id, cbss->bssid,
6530                                                            GFP_KERNEL);
6531                 else
6532                         new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL);
6533
6534                 if (!new_sta) {
6535                         err = -ENOMEM;
6536                         goto out_err;
6537                 }
6538
6539                 new_sta->sta.mlo = mlo;
6540         }
6541
6542         /*
6543          * Set up the information for the new channel before setting the
6544          * new channel. We can't - completely race-free - change the basic
6545          * rates bitmap and the channel (sband) that it refers to, but if
6546          * we set it up before we at least avoid calling into the driver's
6547          * bss_info_changed() method with invalid information (since we do
6548          * call that from changing the channel - only for IDLE and perhaps
6549          * some others, but ...).
6550          *
6551          * So to avoid that, just set up all the new information before the
6552          * channel, but tell the driver to apply it only afterwards, since
6553          * it might need the new channel for that.
6554          */
6555         if (new_sta) {
6556                 const struct cfg80211_bss_ies *ies;
6557                 struct link_sta_info *link_sta;
6558
6559                 rcu_read_lock();
6560                 link_sta = rcu_dereference(new_sta->link[link_id]);
6561                 if (WARN_ON(!link_sta)) {
6562                         rcu_read_unlock();
6563                         sta_info_free(local, new_sta);
6564                         err = -EINVAL;
6565                         goto out_err;
6566                 }
6567
6568                 err = ieee80211_mgd_setup_link_sta(link, new_sta,
6569                                                    link_sta, cbss);
6570                 if (err) {
6571                         rcu_read_unlock();
6572                         sta_info_free(local, new_sta);
6573                         goto out_err;
6574                 }
6575
6576                 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
6577
6578                 /* set timing information */
6579                 link->conf->beacon_int = cbss->beacon_interval;
6580                 ies = rcu_dereference(cbss->beacon_ies);
6581                 if (ies) {
6582                         link->conf->sync_tsf = ies->tsf;
6583                         link->conf->sync_device_ts =
6584                                 bss->device_ts_beacon;
6585
6586                         ieee80211_get_dtim(ies,
6587                                            &link->conf->sync_dtim_count,
6588                                            NULL);
6589                 } else if (!ieee80211_hw_check(&sdata->local->hw,
6590                                                TIMING_BEACON_ONLY)) {
6591                         ies = rcu_dereference(cbss->proberesp_ies);
6592                         /* must be non-NULL since beacon IEs were NULL */
6593                         link->conf->sync_tsf = ies->tsf;
6594                         link->conf->sync_device_ts =
6595                                 bss->device_ts_presp;
6596                         link->conf->sync_dtim_count = 0;
6597                 } else {
6598                         link->conf->sync_tsf = 0;
6599                         link->conf->sync_device_ts = 0;
6600                         link->conf->sync_dtim_count = 0;
6601                 }
6602                 rcu_read_unlock();
6603         }
6604
6605         if (new_sta || override) {
6606                 err = ieee80211_prep_channel(sdata, link, cbss,
6607                                              &link->u.mgd.conn_flags);
6608                 if (err) {
6609                         if (new_sta)
6610                                 sta_info_free(local, new_sta);
6611                         goto out_err;
6612                 }
6613         }
6614
6615         if (new_sta) {
6616                 /*
6617                  * tell driver about BSSID, basic rates and timing
6618                  * this was set up above, before setting the channel
6619                  */
6620                 ieee80211_link_info_change_notify(sdata, link,
6621                                                   BSS_CHANGED_BSSID |
6622                                                   BSS_CHANGED_BASIC_RATES |
6623                                                   BSS_CHANGED_BEACON_INT);
6624
6625                 if (assoc)
6626                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
6627
6628                 err = sta_info_insert(new_sta);
6629                 new_sta = NULL;
6630                 if (err) {
6631                         sdata_info(sdata,
6632                                    "failed to insert STA entry for the AP (error %d)\n",
6633                                    err);
6634                         goto out_err;
6635                 }
6636         } else
6637                 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
6638
6639         /* Cancel scan to ensure that nothing interferes with connection */
6640         if (local->scanning)
6641                 ieee80211_scan_cancel(local);
6642
6643         return 0;
6644
6645 out_err:
6646         ieee80211_link_release_channel(&sdata->deflink);
6647         ieee80211_vif_set_links(sdata, 0);
6648         return err;
6649 }
6650
6651 /* config hooks */
6652 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
6653                        struct cfg80211_auth_request *req)
6654 {
6655         struct ieee80211_local *local = sdata->local;
6656         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6657         struct ieee80211_mgd_auth_data *auth_data;
6658         u16 auth_alg;
6659         int err;
6660         bool cont_auth;
6661
6662         /* prepare auth data structure */
6663
6664         switch (req->auth_type) {
6665         case NL80211_AUTHTYPE_OPEN_SYSTEM:
6666                 auth_alg = WLAN_AUTH_OPEN;
6667                 break;
6668         case NL80211_AUTHTYPE_SHARED_KEY:
6669                 if (fips_enabled)
6670                         return -EOPNOTSUPP;
6671                 auth_alg = WLAN_AUTH_SHARED_KEY;
6672                 break;
6673         case NL80211_AUTHTYPE_FT:
6674                 auth_alg = WLAN_AUTH_FT;
6675                 break;
6676         case NL80211_AUTHTYPE_NETWORK_EAP:
6677                 auth_alg = WLAN_AUTH_LEAP;
6678                 break;
6679         case NL80211_AUTHTYPE_SAE:
6680                 auth_alg = WLAN_AUTH_SAE;
6681                 break;
6682         case NL80211_AUTHTYPE_FILS_SK:
6683                 auth_alg = WLAN_AUTH_FILS_SK;
6684                 break;
6685         case NL80211_AUTHTYPE_FILS_SK_PFS:
6686                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
6687                 break;
6688         case NL80211_AUTHTYPE_FILS_PK:
6689                 auth_alg = WLAN_AUTH_FILS_PK;
6690                 break;
6691         default:
6692                 return -EOPNOTSUPP;
6693         }
6694
6695         if (ifmgd->assoc_data)
6696                 return -EBUSY;
6697
6698         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
6699                             req->ie_len, GFP_KERNEL);
6700         if (!auth_data)
6701                 return -ENOMEM;
6702
6703         memcpy(auth_data->ap_addr,
6704                req->ap_mld_addr ?: req->bss->bssid,
6705                ETH_ALEN);
6706         auth_data->bss = req->bss;
6707         auth_data->link_id = req->link_id;
6708
6709         if (req->auth_data_len >= 4) {
6710                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
6711                         __le16 *pos = (__le16 *) req->auth_data;
6712
6713                         auth_data->sae_trans = le16_to_cpu(pos[0]);
6714                         auth_data->sae_status = le16_to_cpu(pos[1]);
6715                 }
6716                 memcpy(auth_data->data, req->auth_data + 4,
6717                        req->auth_data_len - 4);
6718                 auth_data->data_len += req->auth_data_len - 4;
6719         }
6720
6721         /* Check if continuing authentication or trying to authenticate with the
6722          * same BSS that we were in the process of authenticating with and avoid
6723          * removal and re-addition of the STA entry in
6724          * ieee80211_prep_connection().
6725          */
6726         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
6727                     ifmgd->auth_data->link_id == req->link_id;
6728
6729         if (req->ie && req->ie_len) {
6730                 memcpy(&auth_data->data[auth_data->data_len],
6731                        req->ie, req->ie_len);
6732                 auth_data->data_len += req->ie_len;
6733         }
6734
6735         if (req->key && req->key_len) {
6736                 auth_data->key_len = req->key_len;
6737                 auth_data->key_idx = req->key_idx;
6738                 memcpy(auth_data->key, req->key, req->key_len);
6739         }
6740
6741         auth_data->algorithm = auth_alg;
6742
6743         /* try to authenticate/probe */
6744
6745         if (ifmgd->auth_data) {
6746                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
6747                         auth_data->peer_confirmed =
6748                                 ifmgd->auth_data->peer_confirmed;
6749                 }
6750                 ieee80211_destroy_auth_data(sdata, cont_auth);
6751         }
6752
6753         /* prep auth_data so we don't go into idle on disassoc */
6754         ifmgd->auth_data = auth_data;
6755
6756         /* If this is continuation of an ongoing SAE authentication exchange
6757          * (i.e., request to send SAE Confirm) and the peer has already
6758          * confirmed, mark authentication completed since we are about to send
6759          * out SAE Confirm.
6760          */
6761         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
6762             auth_data->peer_confirmed && auth_data->sae_trans == 2)
6763                 ieee80211_mark_sta_auth(sdata);
6764
6765         if (ifmgd->associated) {
6766                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6767
6768                 sdata_info(sdata,
6769                            "disconnect from AP %pM for new auth to %pM\n",
6770                            sdata->vif.cfg.ap_addr, auth_data->ap_addr);
6771                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6772                                        WLAN_REASON_UNSPECIFIED,
6773                                        false, frame_buf);
6774
6775                 ieee80211_report_disconnect(sdata, frame_buf,
6776                                             sizeof(frame_buf), true,
6777                                             WLAN_REASON_UNSPECIFIED,
6778                                             false);
6779         }
6780
6781         sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr);
6782
6783         /* needed for transmitting the auth frame(s) properly */
6784         memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
6785
6786         err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
6787                                         req->ap_mld_addr, cont_auth, false);
6788         if (err)
6789                 goto err_clear;
6790
6791         err = ieee80211_auth(sdata);
6792         if (err) {
6793                 sta_info_destroy_addr(sdata, auth_data->ap_addr);
6794                 goto err_clear;
6795         }
6796
6797         /* hold our own reference */
6798         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
6799         return 0;
6800
6801  err_clear:
6802         if (!sdata->vif.valid_links) {
6803                 eth_zero_addr(sdata->deflink.u.mgd.bssid);
6804                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
6805                                                   BSS_CHANGED_BSSID);
6806                 mutex_lock(&sdata->local->mtx);
6807                 ieee80211_link_release_channel(&sdata->deflink);
6808                 mutex_unlock(&sdata->local->mtx);
6809         }
6810         ifmgd->auth_data = NULL;
6811         kfree(auth_data);
6812         return err;
6813 }
6814
6815 static ieee80211_conn_flags_t
6816 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
6817                            struct ieee80211_mgd_assoc_data *assoc_data,
6818                            struct cfg80211_assoc_request *req,
6819                            ieee80211_conn_flags_t conn_flags,
6820                            unsigned int link_id)
6821 {
6822         struct ieee80211_local *local = sdata->local;
6823         const struct cfg80211_bss_ies *beacon_ies;
6824         struct ieee80211_supported_band *sband;
6825         const struct element *ht_elem, *vht_elem;
6826         struct ieee80211_link_data *link;
6827         struct cfg80211_bss *cbss;
6828         struct ieee80211_bss *bss;
6829         bool is_5ghz, is_6ghz;
6830
6831         cbss = assoc_data->link[link_id].bss;
6832         if (WARN_ON(!cbss))
6833                 return 0;
6834
6835         bss = (void *)cbss->priv;
6836
6837         sband = local->hw.wiphy->bands[cbss->channel->band];
6838         if (WARN_ON(!sband))
6839                 return 0;
6840
6841         link = sdata_dereference(sdata->link[link_id], sdata);
6842         if (WARN_ON(!link))
6843                 return 0;
6844
6845         is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
6846         is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
6847
6848         /* for MLO connections assume advertising all rates is OK */
6849         if (!req->ap_mld_addr) {
6850                 assoc_data->supp_rates = bss->supp_rates;
6851                 assoc_data->supp_rates_len = bss->supp_rates_len;
6852         }
6853
6854         /* copy and link elems for the STA profile */
6855         if (req->links[link_id].elems_len) {
6856                 memcpy(assoc_data->ie_pos, req->links[link_id].elems,
6857                        req->links[link_id].elems_len);
6858                 assoc_data->link[link_id].elems = assoc_data->ie_pos;
6859                 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
6860                 assoc_data->ie_pos += req->links[link_id].elems_len;
6861         }
6862
6863         rcu_read_lock();
6864         ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
6865         if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
6866                 assoc_data->link[link_id].ap_ht_param =
6867                         ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
6868         else if (!is_6ghz)
6869                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
6870         vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
6871         if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
6872                 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data,
6873                        sizeof(struct ieee80211_vht_cap));
6874         } else if (is_5ghz) {
6875                 link_info(link,
6876                           "VHT capa missing/short, disabling VHT/HE/EHT\n");
6877                 conn_flags |= IEEE80211_CONN_DISABLE_VHT |
6878                               IEEE80211_CONN_DISABLE_HE |
6879                               IEEE80211_CONN_DISABLE_EHT;
6880         }
6881         rcu_read_unlock();
6882
6883         link->u.mgd.beacon_crc_valid = false;
6884         link->u.mgd.dtim_period = 0;
6885         link->u.mgd.have_beacon = false;
6886
6887         /* override HT/VHT configuration only if the AP and we support it */
6888         if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) {
6889                 struct ieee80211_sta_ht_cap sta_ht_cap;
6890
6891                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
6892                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
6893         }
6894
6895         rcu_read_lock();
6896         beacon_ies = rcu_dereference(cbss->beacon_ies);
6897         if (beacon_ies) {
6898                 const struct element *elem;
6899                 u8 dtim_count = 0;
6900
6901                 ieee80211_get_dtim(beacon_ies, &dtim_count,
6902                                    &link->u.mgd.dtim_period);
6903
6904                 sdata->deflink.u.mgd.have_beacon = true;
6905
6906                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
6907                         link->conf->sync_tsf = beacon_ies->tsf;
6908                         link->conf->sync_device_ts = bss->device_ts_beacon;
6909                         link->conf->sync_dtim_count = dtim_count;
6910                 }
6911
6912                 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
6913                                               beacon_ies->data, beacon_ies->len);
6914                 if (elem && elem->datalen >= 3)
6915                         link->conf->profile_periodicity = elem->data[2];
6916                 else
6917                         link->conf->profile_periodicity = 0;
6918
6919                 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
6920                                           beacon_ies->data, beacon_ies->len);
6921                 if (elem && elem->datalen >= 11 &&
6922                     (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6923                         link->conf->ema_ap = true;
6924                 else
6925                         link->conf->ema_ap = false;
6926         }
6927         rcu_read_unlock();
6928
6929         if (bss->corrupt_data) {
6930                 char *corrupt_type = "data";
6931
6932                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
6933                         if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
6934                                 corrupt_type = "beacon and probe response";
6935                         else
6936                                 corrupt_type = "beacon";
6937                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
6938                         corrupt_type = "probe response";
6939                 }
6940                 sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
6941                            cbss->bssid, corrupt_type);
6942         }
6943
6944         if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
6945                 if (sdata->u.mgd.powersave)
6946                         link->smps_mode = IEEE80211_SMPS_DYNAMIC;
6947                 else
6948                         link->smps_mode = IEEE80211_SMPS_OFF;
6949         } else {
6950                 link->smps_mode = link->u.mgd.req_smps;
6951         }
6952
6953         return conn_flags;
6954 }
6955
6956 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
6957                         struct cfg80211_assoc_request *req)
6958 {
6959         unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id;
6960         struct ieee80211_local *local = sdata->local;
6961         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6962         struct ieee80211_mgd_assoc_data *assoc_data;
6963         const struct element *ssid_elem;
6964         struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
6965         ieee80211_conn_flags_t conn_flags = 0;
6966         struct ieee80211_link_data *link;
6967         struct cfg80211_bss *cbss;
6968         struct ieee80211_bss *bss;
6969         bool override;
6970         int i, err;
6971         size_t size = sizeof(*assoc_data) + req->ie_len;
6972
6973         for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
6974                 size += req->links[i].elems_len;
6975
6976         /* FIXME: no support for 4-addr MLO yet */
6977         if (sdata->u.mgd.use_4addr && req->link_id >= 0)
6978                 return -EOPNOTSUPP;
6979
6980         assoc_data = kzalloc(size, GFP_KERNEL);
6981         if (!assoc_data)
6982                 return -ENOMEM;
6983
6984         cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss;
6985
6986         rcu_read_lock();
6987         ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
6988         if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
6989                 rcu_read_unlock();
6990                 kfree(assoc_data);
6991                 return -EINVAL;
6992         }
6993         memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
6994         assoc_data->ssid_len = ssid_elem->datalen;
6995         memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
6996         vif_cfg->ssid_len = assoc_data->ssid_len;
6997         rcu_read_unlock();
6998
6999         if (req->ap_mld_addr) {
7000                 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
7001                         if (!req->links[i].bss)
7002                                 continue;
7003                         link = sdata_dereference(sdata->link[i], sdata);
7004                         if (link)
7005                                 ether_addr_copy(assoc_data->link[i].addr,
7006                                                 link->conf->addr);
7007                         else
7008                                 eth_random_addr(assoc_data->link[i].addr);
7009                 }
7010         } else {
7011                 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
7012         }
7013
7014         assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
7015
7016         memcpy(assoc_data->ap_addr,
7017                req->ap_mld_addr ?: req->bss->bssid,
7018                ETH_ALEN);
7019
7020         if (ifmgd->associated) {
7021                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7022
7023                 sdata_info(sdata,
7024                            "disconnect from AP %pM for new assoc to %pM\n",
7025                            sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
7026                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7027                                        WLAN_REASON_UNSPECIFIED,
7028                                        false, frame_buf);
7029
7030                 ieee80211_report_disconnect(sdata, frame_buf,
7031                                             sizeof(frame_buf), true,
7032                                             WLAN_REASON_UNSPECIFIED,
7033                                             false);
7034         }
7035
7036         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
7037                 err = -EBUSY;
7038                 goto err_free;
7039         }
7040
7041         if (ifmgd->assoc_data) {
7042                 err = -EBUSY;
7043                 goto err_free;
7044         }
7045
7046         if (ifmgd->auth_data) {
7047                 bool match;
7048
7049                 /* keep sta info, bssid if matching */
7050                 match = ether_addr_equal(ifmgd->auth_data->ap_addr,
7051                                          assoc_data->ap_addr) &&
7052                         ifmgd->auth_data->link_id == req->link_id;
7053                 ieee80211_destroy_auth_data(sdata, match);
7054         }
7055
7056         /* prepare assoc data */
7057
7058         bss = (void *)cbss->priv;
7059         assoc_data->wmm = bss->wmm_used &&
7060                           (local->hw.queues >= IEEE80211_NUM_ACS);
7061
7062         /*
7063          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
7064          * We still associate in non-HT mode (11a/b/g) if any one of these
7065          * ciphers is configured as pairwise.
7066          * We can set this to true for non-11n hardware, that'll be checked
7067          * separately along with the peer capabilities.
7068          */
7069         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
7070                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
7071                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
7072                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
7073                         conn_flags |= IEEE80211_CONN_DISABLE_HT;
7074                         conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7075                         conn_flags |= IEEE80211_CONN_DISABLE_HE;
7076                         conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7077                         netdev_info(sdata->dev,
7078                                     "disabling HT/VHT/HE due to WEP/TKIP use\n");
7079                 }
7080         }
7081
7082         /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
7083         if (!bss->wmm_used) {
7084                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7085                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7086                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7087                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7088                 netdev_info(sdata->dev,
7089                             "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
7090         }
7091
7092         if (req->flags & ASSOC_REQ_DISABLE_HT) {
7093                 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
7094                 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7095                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7096                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7097                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7098         }
7099
7100         if (req->flags & ASSOC_REQ_DISABLE_VHT) {
7101                 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
7102                 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7103         }
7104
7105         if (req->flags & ASSOC_REQ_DISABLE_HE) {
7106                 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
7107                 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7108                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7109         }
7110
7111         if (req->flags & ASSOC_REQ_DISABLE_EHT)
7112                 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7113
7114         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
7115         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
7116                sizeof(ifmgd->ht_capa_mask));
7117
7118         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
7119         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
7120                sizeof(ifmgd->vht_capa_mask));
7121
7122         memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
7123         memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
7124                sizeof(ifmgd->s1g_capa_mask));
7125
7126         if (req->ie && req->ie_len) {
7127                 memcpy(assoc_data->ie, req->ie, req->ie_len);
7128                 assoc_data->ie_len = req->ie_len;
7129                 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
7130         } else {
7131                 assoc_data->ie_pos = assoc_data->ie;
7132         }
7133
7134         if (req->fils_kek) {
7135                 /* should already be checked in cfg80211 - so warn */
7136                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
7137                         err = -EINVAL;
7138                         goto err_free;
7139                 }
7140                 memcpy(assoc_data->fils_kek, req->fils_kek,
7141                        req->fils_kek_len);
7142                 assoc_data->fils_kek_len = req->fils_kek_len;
7143         }
7144
7145         if (req->fils_nonces)
7146                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
7147                        2 * FILS_NONCE_LEN);
7148
7149         /* default timeout */
7150         assoc_data->timeout = jiffies;
7151         assoc_data->timeout_started = true;
7152
7153         assoc_data->assoc_link_id = assoc_link_id;
7154
7155         if (req->ap_mld_addr) {
7156                 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7157                         assoc_data->link[i].conn_flags = conn_flags;
7158                         assoc_data->link[i].bss = req->links[i].bss;
7159                 }
7160
7161                 /* if there was no authentication, set up the link */
7162                 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id));
7163                 if (err)
7164                         goto err_clear;
7165         } else {
7166                 assoc_data->link[0].conn_flags = conn_flags;
7167                 assoc_data->link[0].bss = cbss;
7168         }
7169
7170         link = sdata_dereference(sdata->link[assoc_link_id], sdata);
7171         if (WARN_ON(!link)) {
7172                 err = -EINVAL;
7173                 goto err_clear;
7174         }
7175
7176         /* keep old conn_flags from ieee80211_prep_channel() from auth */
7177         conn_flags |= link->u.mgd.conn_flags;
7178         conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req,
7179                                                  conn_flags, assoc_link_id);
7180         override = link->u.mgd.conn_flags != conn_flags;
7181         link->u.mgd.conn_flags |= conn_flags;
7182
7183         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
7184                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
7185              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
7186                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
7187
7188         if (bss->wmm_used && bss->uapsd_supported &&
7189             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
7190                 assoc_data->uapsd = true;
7191                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
7192         } else {
7193                 assoc_data->uapsd = false;
7194                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
7195         }
7196
7197         if (req->prev_bssid)
7198                 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN);
7199
7200         if (req->use_mfp) {
7201                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
7202                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
7203         } else {
7204                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
7205                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
7206         }
7207
7208         if (req->flags & ASSOC_REQ_USE_RRM)
7209                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
7210         else
7211                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
7212
7213         if (req->crypto.control_port)
7214                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
7215         else
7216                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
7217
7218         sdata->control_port_protocol = req->crypto.control_port_ethertype;
7219         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
7220         sdata->control_port_over_nl80211 =
7221                                         req->crypto.control_port_over_nl80211;
7222         sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
7223
7224         /* kick off associate process */
7225         ifmgd->assoc_data = assoc_data;
7226
7227         for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7228                 if (!assoc_data->link[i].bss)
7229                         continue;
7230                 if (i == assoc_data->assoc_link_id)
7231                         continue;
7232                 /* only calculate the flags, hence link == NULL */
7233                 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss,
7234                                              &assoc_data->link[i].conn_flags);
7235                 if (err)
7236                         goto err_clear;
7237         }
7238
7239         /* needed for transmitting the assoc frames properly */
7240         memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN);
7241
7242         err = ieee80211_prep_connection(sdata, cbss, req->link_id,
7243                                         req->ap_mld_addr, true, override);
7244         if (err)
7245                 goto err_clear;
7246
7247         assoc_data->link[assoc_data->assoc_link_id].conn_flags =
7248                 link->u.mgd.conn_flags;
7249
7250         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
7251                 const struct cfg80211_bss_ies *beacon_ies;
7252
7253                 rcu_read_lock();
7254                 beacon_ies = rcu_dereference(req->bss->beacon_ies);
7255
7256                 if (beacon_ies) {
7257                         /*
7258                          * Wait up to one beacon interval ...
7259                          * should this be more if we miss one?
7260                          */
7261                         sdata_info(sdata, "waiting for beacon from %pM\n",
7262                                    link->u.mgd.bssid);
7263                         assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
7264                         assoc_data->timeout_started = true;
7265                         assoc_data->need_beacon = true;
7266                 }
7267                 rcu_read_unlock();
7268         }
7269
7270         run_again(sdata, assoc_data->timeout);
7271
7272         return 0;
7273  err_clear:
7274         eth_zero_addr(sdata->deflink.u.mgd.bssid);
7275         ieee80211_link_info_change_notify(sdata, &sdata->deflink,
7276                                           BSS_CHANGED_BSSID);
7277         ifmgd->assoc_data = NULL;
7278  err_free:
7279         kfree(assoc_data);
7280         return err;
7281 }
7282
7283 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
7284                          struct cfg80211_deauth_request *req)
7285 {
7286         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7287         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7288         bool tx = !req->local_state_change;
7289         struct ieee80211_prep_tx_info info = {
7290                 .subtype = IEEE80211_STYPE_DEAUTH,
7291         };
7292
7293         if (ifmgd->auth_data &&
7294             ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) {
7295                 sdata_info(sdata,
7296                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
7297                            req->bssid, req->reason_code,
7298                            ieee80211_get_reason_code_string(req->reason_code));
7299
7300                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7301                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7302                                                IEEE80211_STYPE_DEAUTH,
7303                                                req->reason_code, tx,
7304                                                frame_buf);
7305                 ieee80211_destroy_auth_data(sdata, false);
7306                 ieee80211_report_disconnect(sdata, frame_buf,
7307                                             sizeof(frame_buf), true,
7308                                             req->reason_code, false);
7309                 drv_mgd_complete_tx(sdata->local, sdata, &info);
7310                 return 0;
7311         }
7312
7313         if (ifmgd->assoc_data &&
7314             ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) {
7315                 sdata_info(sdata,
7316                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
7317                            req->bssid, req->reason_code,
7318                            ieee80211_get_reason_code_string(req->reason_code));
7319
7320                 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7321                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7322                                                IEEE80211_STYPE_DEAUTH,
7323                                                req->reason_code, tx,
7324                                                frame_buf);
7325                 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
7326                 ieee80211_report_disconnect(sdata, frame_buf,
7327                                             sizeof(frame_buf), true,
7328                                             req->reason_code, false);
7329                 return 0;
7330         }
7331
7332         if (ifmgd->associated &&
7333             ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) {
7334                 sdata_info(sdata,
7335                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
7336                            req->bssid, req->reason_code,
7337                            ieee80211_get_reason_code_string(req->reason_code));
7338
7339                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7340                                        req->reason_code, tx, frame_buf);
7341                 ieee80211_report_disconnect(sdata, frame_buf,
7342                                             sizeof(frame_buf), true,
7343                                             req->reason_code, false);
7344                 drv_mgd_complete_tx(sdata->local, sdata, &info);
7345                 return 0;
7346         }
7347
7348         return -ENOTCONN;
7349 }
7350
7351 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
7352                            struct cfg80211_disassoc_request *req)
7353 {
7354         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7355
7356         if (!sdata->u.mgd.associated ||
7357             memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
7358                 return -ENOTCONN;
7359
7360         sdata_info(sdata,
7361                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
7362                    req->ap_addr, req->reason_code,
7363                    ieee80211_get_reason_code_string(req->reason_code));
7364
7365         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
7366                                req->reason_code, !req->local_state_change,
7367                                frame_buf);
7368
7369         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
7370                                     req->reason_code, false);
7371
7372         return 0;
7373 }
7374
7375 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
7376 {
7377         cancel_work_sync(&link->u.mgd.request_smps_work);
7378         cancel_work_sync(&link->u.mgd.chswitch_work);
7379 }
7380
7381 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
7382 {
7383         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7384
7385         /*
7386          * Make sure some work items will not run after this,
7387          * they will not do anything but might not have been
7388          * cancelled when disconnecting.
7389          */
7390         cancel_work_sync(&ifmgd->monitor_work);
7391         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
7392         cancel_work_sync(&ifmgd->csa_connection_drop_work);
7393         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
7394
7395         sdata_lock(sdata);
7396         if (ifmgd->assoc_data)
7397                 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
7398         if (ifmgd->auth_data)
7399                 ieee80211_destroy_auth_data(sdata, false);
7400         spin_lock_bh(&ifmgd->teardown_lock);
7401         if (ifmgd->teardown_skb) {
7402                 kfree_skb(ifmgd->teardown_skb);
7403                 ifmgd->teardown_skb = NULL;
7404                 ifmgd->orig_teardown_skb = NULL;
7405         }
7406         kfree(ifmgd->assoc_req_ies);
7407         ifmgd->assoc_req_ies = NULL;
7408         ifmgd->assoc_req_ies_len = 0;
7409         spin_unlock_bh(&ifmgd->teardown_lock);
7410         del_timer_sync(&ifmgd->timer);
7411         sdata_unlock(sdata);
7412 }
7413
7414 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
7415                                enum nl80211_cqm_rssi_threshold_event rssi_event,
7416                                s32 rssi_level,
7417                                gfp_t gfp)
7418 {
7419         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7420
7421         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
7422
7423         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
7424 }
7425 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
7426
7427 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
7428 {
7429         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7430
7431         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
7432
7433         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
7434 }
7435 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
7436
7437 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
7438                                             int rssi_min_thold,
7439                                             int rssi_max_thold)
7440 {
7441         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
7442
7443         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
7444                 return;
7445
7446         /*
7447          * Scale up threshold values before storing it, as the RSSI averaging
7448          * algorithm uses a scaled up value as well. Change this scaling
7449          * factor if the RSSI averaging algorithm changes.
7450          */
7451         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
7452         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
7453 }
7454
7455 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
7456                                     int rssi_min_thold,
7457                                     int rssi_max_thold)
7458 {
7459         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7460
7461         WARN_ON(rssi_min_thold == rssi_max_thold ||
7462                 rssi_min_thold > rssi_max_thold);
7463
7464         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
7465                                        rssi_max_thold);
7466 }
7467 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
7468
7469 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
7470 {
7471         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7472
7473         _ieee80211_enable_rssi_reports(sdata, 0, 0);
7474 }
7475 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);