net/mac80211/util.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42         BUG_ON(!wiphy);
  43
  44         local = wiphy_priv(wiphy);
  45         return &local->hw;
  46 }
  47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  48
  49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  50                         enum nl80211_iftype type)
  51 {
  52         __le16 fc = hdr->frame_control;
  53
  54          /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
  55         if (len < 16)
  56                 return NULL;
  57
  58         if (ieee80211_is_data(fc)) {
  59                 if (len < 24) /* drop incorrect hdr len (data) */
  60                         return NULL;
  61
  62                 if (ieee80211_has_a4(fc))
  63                         return NULL;
  64                 if (ieee80211_has_tods(fc))
  65                         return hdr->addr1;
  66                 if (ieee80211_has_fromds(fc))
  67                         return hdr->addr2;
  68
  69                 return hdr->addr3;
  70         }
  71
  72         if (ieee80211_is_mgmt(fc)) {
  73                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  74                         return NULL;
  75                 return hdr->addr3;
  76         }
  77
  78         if (ieee80211_is_ctl(fc)) {
  79                 if(ieee80211_is_pspoll(fc))
  80                         return hdr->addr1;
  81
  82                 if (ieee80211_is_back_req(fc)) {
  83                         switch (type) {
  84                         case NL80211_IFTYPE_STATION:
  85                                 return hdr->addr2;
  86                         case NL80211_IFTYPE_AP:
  87                         case NL80211_IFTYPE_AP_VLAN:
  88                                 return hdr->addr1;
  89                         default:
  90                                 break; /* fall through to the return */
  91                         }
  92                 }
  93         }
  94
  95         return NULL;
  96 }
  97
  98 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  99 {
 100         struct sk_buff *skb;
 101         struct ieee80211_hdr *hdr;
 102
 103         skb_queue_walk(&tx->skbs, skb) {
 104                 hdr = (struct ieee80211_hdr *) skb->data;
 105                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 106         }
 107 }
 108
 109 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
 110                              int rate, int erp, int short_preamble)
 111 {
 112         int dur;
 113
 114         /* calculate duration (in microseconds, rounded up to next higher
 115          * integer if it includes a fractional microsecond) to send frame of
 116          * len bytes (does not include FCS) at the given rate. Duration will
 117          * also include SIFS.
 118          *
 119          * rate is in 100 kbps, so divident is multiplied by 10 in the
 120          * DIV_ROUND_UP() operations.
 121          */
 122
 123         if (band == IEEE80211_BAND_5GHZ || erp) {
 124                 /*
 125                  * OFDM:
 126                  *
 127                  * N_DBPS = DATARATE x 4
 128                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 129                  *      (16 = SIGNAL time, 6 = tail bits)
 130                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 131                  *
 132                  * T_SYM = 4 usec
 133                  * 802.11a - 17.5.2: aSIFSTime = 16 usec
 134                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 135                  *      signal ext = 6 usec
 136                  */
 137                 dur = 16; /* SIFS + signal ext */
 138                 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
 139                 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
 140                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 141                                         4 * rate); /* T_SYM x N_SYM */
 142         } else {
 143                 /*
 144                  * 802.11b or 802.11g with 802.11b compatibility:
 145                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 146                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 147                  *
 148                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 149                  * aSIFSTime = 10 usec
 150                  * aPreambleLength = 144 usec or 72 usec with short preamble
 151                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 152                  */
 153                 dur = 10; /* aSIFSTime = 10 usec */
 154                 dur += short_preamble ? (72 + 24) : (144 + 48);
 155
 156                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 157         }
 158
 159         return dur;
 160 }
 161
 162 /* Exported duration function for driver use */
 163 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 164                                         struct ieee80211_vif *vif,
 165                                         enum ieee80211_band band,
 166                                         size_t frame_len,
 167                                         struct ieee80211_rate *rate)
 168 {
 169         struct ieee80211_sub_if_data *sdata;
 170         u16 dur;
 171         int erp;
 172         bool short_preamble = false;
 173
 174         erp = 0;
 175         if (vif) {
 176                 sdata = vif_to_sdata(vif);
 177                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 178                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 179                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 180         }
 181
 182         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 183                                        short_preamble);
 184
 185         return cpu_to_le16(dur);
 186 }
 187 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 188
 189 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 190                               struct ieee80211_vif *vif, size_t frame_len,
 191                               const struct ieee80211_tx_info *frame_txctl)
 192 {
 193         struct ieee80211_local *local = hw_to_local(hw);
 194         struct ieee80211_rate *rate;
 195         struct ieee80211_sub_if_data *sdata;
 196         bool short_preamble;
 197         int erp;
 198         u16 dur;
 199         struct ieee80211_supported_band *sband;
 200
 201         sband = local->hw.wiphy->bands[frame_txctl->band];
 202
 203         short_preamble = false;
 204
 205         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 206
 207         erp = 0;
 208         if (vif) {
 209                 sdata = vif_to_sdata(vif);
 210                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 211                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 212                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 213         }
 214
 215         /* CTS duration */
 216         dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
 217                                        erp, short_preamble);
 218         /* Data frame duration */
 219         dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
 220                                         erp, short_preamble);
 221         /* ACK duration */
 222         dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
 223                                         erp, short_preamble);
 224
 225         return cpu_to_le16(dur);
 226 }
 227 EXPORT_SYMBOL(ieee80211_rts_duration);
 228
 229 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 230                                     struct ieee80211_vif *vif,
 231                                     size_t frame_len,
 232                                     const struct ieee80211_tx_info *frame_txctl)
 233 {
 234         struct ieee80211_local *local = hw_to_local(hw);
 235         struct ieee80211_rate *rate;
 236         struct ieee80211_sub_if_data *sdata;
 237         bool short_preamble;
 238         int erp;
 239         u16 dur;
 240         struct ieee80211_supported_band *sband;
 241
 242         sband = local->hw.wiphy->bands[frame_txctl->band];
 243
 244         short_preamble = false;
 245
 246         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 247         erp = 0;
 248         if (vif) {
 249                 sdata = vif_to_sdata(vif);
 250                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 251                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 252                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 253         }
 254
 255         /* Data frame duration */
 256         dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
 257                                        erp, short_preamble);
 258         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 259                 /* ACK duration */
 260                 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
 261                                                 erp, short_preamble);
 262         }
 263
 264         return cpu_to_le16(dur);
 265 }
 266 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 267
 268 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 269 {
 270         struct ieee80211_sub_if_data *sdata;
 271         int n_acs = IEEE80211_NUM_ACS;
 272
 273         if (local->hw.queues < IEEE80211_NUM_ACS)
 274                 n_acs = 1;
 275
 276         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 277                 int ac;
 278
 279                 if (!sdata->dev)
 280                         continue;
 281
 282                 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
 283                         continue;
 284
 285                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 286                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 287                         continue;
 288
 289                 for (ac = 0; ac < n_acs; ac++) {
 290                         int ac_queue = sdata->vif.hw_queue[ac];
 291
 292                         if (ac_queue == queue ||
 293                             (sdata->vif.cab_queue == queue &&
 294                              local->queue_stop_reasons[ac_queue] == 0 &&
 295                              skb_queue_empty(&local->pending[ac_queue])))
 296                                 netif_wake_subqueue(sdata->dev, ac);
 297                 }
 298         }
 299 }
 300
 301 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 302                                    enum queue_stop_reason reason)
 303 {
 304         struct ieee80211_local *local = hw_to_local(hw);
 305
 306         trace_wake_queue(local, queue, reason);
 307
 308         if (WARN_ON(queue >= hw->queues))
 309                 return;
 310
 311         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 312                 return;
 313
 314         __clear_bit(reason, &local->queue_stop_reasons[queue]);
 315
 316         if (local->queue_stop_reasons[queue] != 0)
 317                 /* someone still has this queue stopped */
 318                 return;
 319
 320         if (skb_queue_empty(&local->pending[queue])) {
 321                 rcu_read_lock();
 322                 ieee80211_propagate_queue_wake(local, queue);
 323                 rcu_read_unlock();
 324         } else
 325                 tasklet_schedule(&local->tx_pending_tasklet);
 326 }
 327
 328 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 329                                     enum queue_stop_reason reason)
 330 {
 331         struct ieee80211_local *local = hw_to_local(hw);
 332         unsigned long flags;
 333
 334         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 335         __ieee80211_wake_queue(hw, queue, reason);
 336         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 337 }
 338
 339 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 340 {
 341         ieee80211_wake_queue_by_reason(hw, queue,
 342                                        IEEE80211_QUEUE_STOP_REASON_DRIVER);
 343 }
 344 EXPORT_SYMBOL(ieee80211_wake_queue);
 345
 346 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 347                                    enum queue_stop_reason reason)
 348 {
 349         struct ieee80211_local *local = hw_to_local(hw);
 350         struct ieee80211_sub_if_data *sdata;
 351         int n_acs = IEEE80211_NUM_ACS;
 352
 353         trace_stop_queue(local, queue, reason);
 354
 355         if (WARN_ON(queue >= hw->queues))
 356                 return;
 357
 358         if (test_bit(reason, &local->queue_stop_reasons[queue]))
 359                 return;
 360
 361         __set_bit(reason, &local->queue_stop_reasons[queue]);
 362
 363         if (local->hw.queues < IEEE80211_NUM_ACS)
 364                 n_acs = 1;
 365
 366         rcu_read_lock();
 367         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 368                 int ac;
 369
 370                 if (!sdata->dev)
 371                         continue;
 372
 373                 for (ac = 0; ac < n_acs; ac++) {
 374                         if (sdata->vif.hw_queue[ac] == queue ||
 375                             sdata->vif.cab_queue == queue)
 376                                 netif_stop_subqueue(sdata->dev, ac);
 377                 }
 378         }
 379         rcu_read_unlock();
 380 }
 381
 382 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 383                                     enum queue_stop_reason reason)
 384 {
 385         struct ieee80211_local *local = hw_to_local(hw);
 386         unsigned long flags;
 387
 388         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 389         __ieee80211_stop_queue(hw, queue, reason);
 390         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 391 }
 392
 393 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 394 {
 395         ieee80211_stop_queue_by_reason(hw, queue,
 396                                        IEEE80211_QUEUE_STOP_REASON_DRIVER);
 397 }
 398 EXPORT_SYMBOL(ieee80211_stop_queue);
 399
 400 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 401                                struct sk_buff *skb)
 402 {
 403         struct ieee80211_hw *hw = &local->hw;
 404         unsigned long flags;
 405         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 406         int queue = info->hw_queue;
 407
 408         if (WARN_ON(!info->control.vif)) {
 409                 ieee80211_free_txskb(&local->hw, skb);
 410                 return;
 411         }
 412
 413         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 414         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
 415         __skb_queue_tail(&local->pending[queue], skb);
 416         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
 417         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 418 }
 419
 420 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
 421                                    struct sk_buff_head *skbs,
 422                                    void (*fn)(void *data), void *data)
 423 {
 424         struct ieee80211_hw *hw = &local->hw;
 425         struct sk_buff *skb;
 426         unsigned long flags;
 427         int queue, i;
 428
 429         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 430         while ((skb = skb_dequeue(skbs))) {
 431                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 432
 433                 if (WARN_ON(!info->control.vif)) {
 434                         ieee80211_free_txskb(&local->hw, skb);
 435                         continue;
 436                 }
 437
 438                 queue = info->hw_queue;
 439
 440                 __ieee80211_stop_queue(hw, queue,
 441                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
 442
 443                 __skb_queue_tail(&local->pending[queue], skb);
 444         }
 445
 446         if (fn)
 447                 fn(data);
 448
 449         for (i = 0; i < hw->queues; i++)
 450                 __ieee80211_wake_queue(hw, i,
 451                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
 452         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 453 }
 454
 455 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 456                                      unsigned long queues,
 457                                      enum queue_stop_reason reason)
 458 {
 459         struct ieee80211_local *local = hw_to_local(hw);
 460         unsigned long flags;
 461         int i;
 462
 463         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 464
 465         for_each_set_bit(i, &queues, hw->queues)
 466                 __ieee80211_stop_queue(hw, i, reason);
 467
 468         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 469 }
 470
 471 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 472 {
 473         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 474                                         IEEE80211_QUEUE_STOP_REASON_DRIVER);
 475 }
 476 EXPORT_SYMBOL(ieee80211_stop_queues);
 477
 478 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 479 {
 480         struct ieee80211_local *local = hw_to_local(hw);
 481         unsigned long flags;
 482         int ret;
 483
 484         if (WARN_ON(queue >= hw->queues))
 485                 return true;
 486
 487         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 488         ret = !!local->queue_stop_reasons[queue];
 489         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 490         return ret;
 491 }
 492 EXPORT_SYMBOL(ieee80211_queue_stopped);
 493
 494 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 495                                      unsigned long queues,
 496                                      enum queue_stop_reason reason)
 497 {
 498         struct ieee80211_local *local = hw_to_local(hw);
 499         unsigned long flags;
 500         int i;
 501
 502         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 503
 504         for_each_set_bit(i, &queues, hw->queues)
 505                 __ieee80211_wake_queue(hw, i, reason);
 506
 507         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 508 }
 509
 510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 511 {
 512         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 513                                         IEEE80211_QUEUE_STOP_REASON_DRIVER);
 514 }
 515 EXPORT_SYMBOL(ieee80211_wake_queues);
 516
 517 void ieee80211_flush_queues(struct ieee80211_local *local,
 518                             struct ieee80211_sub_if_data *sdata)
 519 {
 520         u32 queues;
 521
 522         if (!local->ops->flush)
 523                 return;
 524
 525         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
 526                 int ac;
 527
 528                 queues = 0;
 529
 530                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 531                         queues |= BIT(sdata->vif.hw_queue[ac]);
 532                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 533                         queues |= BIT(sdata->vif.cab_queue);
 534         } else {
 535                 /* all queues */
 536                 queues = BIT(local->hw.queues) - 1;
 537         }
 538
 539         ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
 540                                         IEEE80211_QUEUE_STOP_REASON_FLUSH);
 541
 542         drv_flush(local, queues, false);
 543
 544         ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
 545                                         IEEE80211_QUEUE_STOP_REASON_FLUSH);
 546 }
 547
 548 void ieee80211_iterate_active_interfaces(
 549         struct ieee80211_hw *hw, u32 iter_flags,
 550         void (*iterator)(void *data, u8 *mac,
 551                          struct ieee80211_vif *vif),
 552         void *data)
 553 {
 554         struct ieee80211_local *local = hw_to_local(hw);
 555         struct ieee80211_sub_if_data *sdata;
 556
 557         mutex_lock(&local->iflist_mtx);
 558
 559         list_for_each_entry(sdata, &local->interfaces, list) {
 560                 switch (sdata->vif.type) {
 561                 case NL80211_IFTYPE_MONITOR:
 562                 case NL80211_IFTYPE_AP_VLAN:
 563                         continue;
 564                 default:
 565                         break;
 566                 }
 567                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 568                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 569                         continue;
 570                 if (ieee80211_sdata_running(sdata))
 571                         iterator(data, sdata->vif.addr,
 572                                  &sdata->vif);
 573         }
 574
 575         sdata = rcu_dereference_protected(local->monitor_sdata,
 576                                           lockdep_is_held(&local->iflist_mtx));
 577         if (sdata &&
 578             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 579              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 580                 iterator(data, sdata->vif.addr, &sdata->vif);
 581
 582         mutex_unlock(&local->iflist_mtx);
 583 }
 584 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
 585
 586 void ieee80211_iterate_active_interfaces_atomic(
 587         struct ieee80211_hw *hw, u32 iter_flags,
 588         void (*iterator)(void *data, u8 *mac,
 589                          struct ieee80211_vif *vif),
 590         void *data)
 591 {
 592         struct ieee80211_local *local = hw_to_local(hw);
 593         struct ieee80211_sub_if_data *sdata;
 594
 595         rcu_read_lock();
 596
 597         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 598                 switch (sdata->vif.type) {
 599                 case NL80211_IFTYPE_MONITOR:
 600                 case NL80211_IFTYPE_AP_VLAN:
 601                         continue;
 602                 default:
 603                         break;
 604                 }
 605                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 606                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 607                         continue;
 608                 if (ieee80211_sdata_running(sdata))
 609                         iterator(data, sdata->vif.addr,
 610                                  &sdata->vif);
 611         }
 612
 613         sdata = rcu_dereference(local->monitor_sdata);
 614         if (sdata &&
 615             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 616              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 617                 iterator(data, sdata->vif.addr, &sdata->vif);
 618
 619         rcu_read_unlock();
 620 }
 621 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 622
 623 /*
 624  * Nothing should have been stuffed into the workqueue during
 625  * the suspend->resume cycle. If this WARN is seen then there
 626  * is a bug with either the driver suspend or something in
 627  * mac80211 stuffing into the workqueue which we haven't yet
 628  * cleared during mac80211's suspend cycle.
 629  */
 630 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 631 {
 632         if (WARN(local->suspended && !local->resuming,
 633                  "queueing ieee80211 work while going to suspend\n"))
 634                 return false;
 635
 636         return true;
 637 }
 638
 639 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 640 {
 641         struct ieee80211_local *local = hw_to_local(hw);
 642
 643         if (!ieee80211_can_queue_work(local))
 644                 return;
 645
 646         queue_work(local->workqueue, work);
 647 }
 648 EXPORT_SYMBOL(ieee80211_queue_work);
 649
 650 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 651                                   struct delayed_work *dwork,
 652                                   unsigned long delay)
 653 {
 654         struct ieee80211_local *local = hw_to_local(hw);
 655
 656         if (!ieee80211_can_queue_work(local))
 657                 return;
 658
 659         queue_delayed_work(local->workqueue, dwork, delay);
 660 }
 661 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 662
 663 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
 664                                struct ieee802_11_elems *elems,
 665                                u64 filter, u32 crc)
 666 {
 667         size_t left = len;
 668         u8 *pos = start;
 669         bool calc_crc = filter != 0;
 670         DECLARE_BITMAP(seen_elems, 256);
 671
 672         bitmap_zero(seen_elems, 256);
 673         memset(elems, 0, sizeof(*elems));
 674         elems->ie_start = start;
 675         elems->total_len = len;
 676
 677         while (left >= 2) {
 678                 u8 id, elen;
 679                 bool elem_parse_failed;
 680
 681                 id = *pos++;
 682                 elen = *pos++;
 683                 left -= 2;
 684
 685                 if (elen > left) {
 686                         elems->parse_error = true;
 687                         break;
 688                 }
 689
 690                 switch (id) {
 691                 case WLAN_EID_SSID:
 692                 case WLAN_EID_SUPP_RATES:
 693                 case WLAN_EID_FH_PARAMS:
 694                 case WLAN_EID_DS_PARAMS:
 695                 case WLAN_EID_CF_PARAMS:
 696                 case WLAN_EID_TIM:
 697                 case WLAN_EID_IBSS_PARAMS:
 698                 case WLAN_EID_CHALLENGE:
 699                 case WLAN_EID_RSN:
 700                 case WLAN_EID_ERP_INFO:
 701                 case WLAN_EID_EXT_SUPP_RATES:
 702                 case WLAN_EID_HT_CAPABILITY:
 703                 case WLAN_EID_HT_OPERATION:
 704                 case WLAN_EID_VHT_CAPABILITY:
 705                 case WLAN_EID_VHT_OPERATION:
 706                 case WLAN_EID_MESH_ID:
 707                 case WLAN_EID_MESH_CONFIG:
 708                 case WLAN_EID_PEER_MGMT:
 709                 case WLAN_EID_PREQ:
 710                 case WLAN_EID_PREP:
 711                 case WLAN_EID_PERR:
 712                 case WLAN_EID_RANN:
 713                 case WLAN_EID_CHANNEL_SWITCH:
 714                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 715                 case WLAN_EID_COUNTRY:
 716                 case WLAN_EID_PWR_CONSTRAINT:
 717                 case WLAN_EID_TIMEOUT_INTERVAL:
 718                         if (test_bit(id, seen_elems)) {
 719                                 elems->parse_error = true;
 720                                 left -= elen;
 721                                 pos += elen;
 722                                 continue;
 723                         }
 724                         break;
 725                 }
 726
 727                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 728                         crc = crc32_be(crc, pos - 2, elen + 2);
 729
 730                 elem_parse_failed = false;
 731
 732                 switch (id) {
 733                 case WLAN_EID_SSID:
 734                         elems->ssid = pos;
 735                         elems->ssid_len = elen;
 736                         break;
 737                 case WLAN_EID_SUPP_RATES:
 738                         elems->supp_rates = pos;
 739                         elems->supp_rates_len = elen;
 740                         break;
 741                 case WLAN_EID_FH_PARAMS:
 742                         elems->fh_params = pos;
 743                         elems->fh_params_len = elen;
 744                         break;
 745                 case WLAN_EID_DS_PARAMS:
 746                         elems->ds_params = pos;
 747                         elems->ds_params_len = elen;
 748                         break;
 749                 case WLAN_EID_CF_PARAMS:
 750                         elems->cf_params = pos;
 751                         elems->cf_params_len = elen;
 752                         break;
 753                 case WLAN_EID_TIM:
 754                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 755                                 elems->tim = (void *)pos;
 756                                 elems->tim_len = elen;
 757                         } else
 758                                 elem_parse_failed = true;
 759                         break;
 760                 case WLAN_EID_IBSS_PARAMS:
 761                         elems->ibss_params = pos;
 762                         elems->ibss_params_len = elen;
 763                         break;
 764                 case WLAN_EID_CHALLENGE:
 765                         elems->challenge = pos;
 766                         elems->challenge_len = elen;
 767                         break;
 768                 case WLAN_EID_VENDOR_SPECIFIC:
 769                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 770                             pos[2] == 0xf2) {
 771                                 /* Microsoft OUI (00:50:F2) */
 772
 773                                 if (calc_crc)
 774                                         crc = crc32_be(crc, pos - 2, elen + 2);
 775
 776                                 if (elen >= 5 && pos[3] == 2) {
 777                                         /* OUI Type 2 - WMM IE */
 778                                         if (pos[4] == 0) {
 779                                                 elems->wmm_info = pos;
 780                                                 elems->wmm_info_len = elen;
 781                                         } else if (pos[4] == 1) {
 782                                                 elems->wmm_param = pos;
 783                                                 elems->wmm_param_len = elen;
 784                                         }
 785                                 }
 786                         }
 787                         break;
 788                 case WLAN_EID_RSN:
 789                         elems->rsn = pos;
 790                         elems->rsn_len = elen;
 791                         break;
 792                 case WLAN_EID_ERP_INFO:
 793                         elems->erp_info = pos;
 794                         elems->erp_info_len = elen;
 795                         break;
 796                 case WLAN_EID_EXT_SUPP_RATES:
 797                         elems->ext_supp_rates = pos;
 798                         elems->ext_supp_rates_len = elen;
 799                         break;
 800                 case WLAN_EID_HT_CAPABILITY:
 801                         if (elen >= sizeof(struct ieee80211_ht_cap))
 802                                 elems->ht_cap_elem = (void *)pos;
 803                         else
 804                                 elem_parse_failed = true;
 805                         break;
 806                 case WLAN_EID_HT_OPERATION:
 807                         if (elen >= sizeof(struct ieee80211_ht_operation))
 808                                 elems->ht_operation = (void *)pos;
 809                         else
 810                                 elem_parse_failed = true;
 811                         break;
 812                 case WLAN_EID_VHT_CAPABILITY:
 813                         if (elen >= sizeof(struct ieee80211_vht_cap))
 814                                 elems->vht_cap_elem = (void *)pos;
 815                         else
 816                                 elem_parse_failed = true;
 817                         break;
 818                 case WLAN_EID_VHT_OPERATION:
 819                         if (elen >= sizeof(struct ieee80211_vht_operation))
 820                                 elems->vht_operation = (void *)pos;
 821                         else
 822                                 elem_parse_failed = true;
 823                         break;
 824                 case WLAN_EID_OPMODE_NOTIF:
 825                         if (elen > 0)
 826                                 elems->opmode_notif = pos;
 827                         else
 828                                 elem_parse_failed = true;
 829                         break;
 830                 case WLAN_EID_MESH_ID:
 831                         elems->mesh_id = pos;
 832                         elems->mesh_id_len = elen;
 833                         break;
 834                 case WLAN_EID_MESH_CONFIG:
 835                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 836                                 elems->mesh_config = (void *)pos;
 837                         else
 838                                 elem_parse_failed = true;
 839                         break;
 840                 case WLAN_EID_PEER_MGMT:
 841                         elems->peering = pos;
 842                         elems->peering_len = elen;
 843                         break;
 844                 case WLAN_EID_MESH_AWAKE_WINDOW:
 845                         if (elen >= 2)
 846                                 elems->awake_window = (void *)pos;
 847                         break;
 848                 case WLAN_EID_PREQ:
 849                         elems->preq = pos;
 850                         elems->preq_len = elen;
 851                         break;
 852                 case WLAN_EID_PREP:
 853                         elems->prep = pos;
 854                         elems->prep_len = elen;
 855                         break;
 856                 case WLAN_EID_PERR:
 857                         elems->perr = pos;
 858                         elems->perr_len = elen;
 859                         break;
 860                 case WLAN_EID_RANN:
 861                         if (elen >= sizeof(struct ieee80211_rann_ie))
 862                                 elems->rann = (void *)pos;
 863                         else
 864                                 elem_parse_failed = true;
 865                         break;
 866                 case WLAN_EID_CHANNEL_SWITCH:
 867                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 868                                 elem_parse_failed = true;
 869                                 break;
 870                         }
 871                         elems->ch_switch_ie = (void *)pos;
 872                         break;
 873                 case WLAN_EID_QUIET:
 874                         if (!elems->quiet_elem) {
 875                                 elems->quiet_elem = pos;
 876                                 elems->quiet_elem_len = elen;
 877                         }
 878                         elems->num_of_quiet_elem++;
 879                         break;
 880                 case WLAN_EID_COUNTRY:
 881                         elems->country_elem = pos;
 882                         elems->country_elem_len = elen;
 883                         break;
 884                 case WLAN_EID_PWR_CONSTRAINT:
 885                         if (elen != 1) {
 886                                 elem_parse_failed = true;
 887                                 break;
 888                         }
 889                         elems->pwr_constr_elem = pos;
 890                         break;
 891                 case WLAN_EID_TIMEOUT_INTERVAL:
 892                         elems->timeout_int = pos;
 893                         elems->timeout_int_len = elen;
 894                         break;
 895                 default:
 896                         break;
 897                 }
 898
 899                 if (elem_parse_failed)
 900                         elems->parse_error = true;
 901                 else
 902                         __set_bit(id, seen_elems);
 903
 904                 left -= elen;
 905                 pos += elen;
 906         }
 907
 908         if (left != 0)
 909                 elems->parse_error = true;
 910
 911         return crc;
 912 }
 913
 914 void ieee802_11_parse_elems(u8 *start, size_t len,
 915                             struct ieee802_11_elems *elems)
 916 {
 917         ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
 918 }
 919
 920 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
 921                                bool bss_notify)
 922 {
 923         struct ieee80211_local *local = sdata->local;
 924         struct ieee80211_tx_queue_params qparam;
 925         struct ieee80211_chanctx_conf *chanctx_conf;
 926         int ac;
 927         bool use_11b, enable_qos;
 928         int aCWmin, aCWmax;
 929
 930         if (!local->ops->conf_tx)
 931                 return;
 932
 933         if (local->hw.queues < IEEE80211_NUM_ACS)
 934                 return;
 935
 936         memset(&qparam, 0, sizeof(qparam));
 937
 938         rcu_read_lock();
 939         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 940         use_11b = (chanctx_conf &&
 941                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
 942                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
 943         rcu_read_unlock();
 944
 945         /*
 946          * By default disable QoS in STA mode for old access points, which do
 947          * not support 802.11e. New APs will provide proper queue parameters,
 948          * that we will configure later.
 949          */
 950         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
 951
 952         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 953                 /* Set defaults according to 802.11-2007 Table 7-37 */
 954                 aCWmax = 1023;
 955                 if (use_11b)
 956                         aCWmin = 31;
 957                 else
 958                         aCWmin = 15;
 959
 960                 if (enable_qos) {
 961                         switch (ac) {
 962                         case IEEE80211_AC_BK:
 963                                 qparam.cw_max = aCWmax;
 964                                 qparam.cw_min = aCWmin;
 965                                 qparam.txop = 0;
 966                                 qparam.aifs = 7;
 967                                 break;
 968                         /* never happens but let's not leave undefined */
 969                         default:
 970                         case IEEE80211_AC_BE:
 971                                 qparam.cw_max = aCWmax;
 972                                 qparam.cw_min = aCWmin;
 973                                 qparam.txop = 0;
 974                                 qparam.aifs = 3;
 975                                 break;
 976                         case IEEE80211_AC_VI:
 977                                 qparam.cw_max = aCWmin;
 978                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
 979                                 if (use_11b)
 980                                         qparam.txop = 6016/32;
 981                                 else
 982                                         qparam.txop = 3008/32;
 983                                 qparam.aifs = 2;
 984                                 break;
 985                         case IEEE80211_AC_VO:
 986                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
 987                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
 988                                 if (use_11b)
 989                                         qparam.txop = 3264/32;
 990                                 else
 991                                         qparam.txop = 1504/32;
 992                                 qparam.aifs = 2;
 993                                 break;
 994                         }
 995                 } else {
 996                         /* Confiure old 802.11b/g medium access rules. */
 997                         qparam.cw_max = aCWmax;
 998                         qparam.cw_min = aCWmin;
 999                         qparam.txop = 0;
1000                         qparam.aifs = 2;
1001                 }
1002
1003                 qparam.uapsd = false;
1004
1005                 sdata->tx_conf[ac] = qparam;
1006                 drv_conf_tx(local, sdata, ac, &qparam);
1007         }
1008
1009         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1010             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1011                 sdata->vif.bss_conf.qos = enable_qos;
1012                 if (bss_notify)
1013                         ieee80211_bss_info_change_notify(sdata,
1014                                                          BSS_CHANGED_QOS);
1015         }
1016 }
1017
1018 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1019                                   const size_t supp_rates_len,
1020                                   const u8 *supp_rates)
1021 {
1022         struct ieee80211_chanctx_conf *chanctx_conf;
1023         int i, have_higher_than_11mbit = 0;
1024
1025         /* cf. IEEE 802.11 9.2.12 */
1026         for (i = 0; i < supp_rates_len; i++)
1027                 if ((supp_rates[i] & 0x7f) * 5 > 110)
1028                         have_higher_than_11mbit = 1;
1029
1030         rcu_read_lock();
1031         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1032
1033         if (chanctx_conf &&
1034             chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
1035             have_higher_than_11mbit)
1036                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1037         else
1038                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1039         rcu_read_unlock();
1040
1041         ieee80211_set_wmm_default(sdata, true);
1042 }
1043
1044 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1045                               enum ieee80211_band band)
1046 {
1047         struct ieee80211_supported_band *sband;
1048         struct ieee80211_rate *bitrates;
1049         u32 mandatory_rates;
1050         enum ieee80211_rate_flags mandatory_flag;
1051         int i;
1052
1053         sband = local->hw.wiphy->bands[band];
1054         if (WARN_ON(!sband))
1055                 return 1;
1056
1057         if (band == IEEE80211_BAND_2GHZ)
1058                 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1059         else
1060                 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1061
1062         bitrates = sband->bitrates;
1063         mandatory_rates = 0;
1064         for (i = 0; i < sband->n_bitrates; i++)
1065                 if (bitrates[i].flags & mandatory_flag)
1066                         mandatory_rates |= BIT(i);
1067         return mandatory_rates;
1068 }
1069
1070 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1071                          u16 transaction, u16 auth_alg, u16 status,
1072                          const u8 *extra, size_t extra_len, const u8 *da,
1073                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1074                          u32 tx_flags)
1075 {
1076         struct ieee80211_local *local = sdata->local;
1077         struct sk_buff *skb;
1078         struct ieee80211_mgmt *mgmt;
1079         int err;
1080
1081         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1082                             sizeof(*mgmt) + 6 + extra_len);
1083         if (!skb)
1084                 return;
1085
1086         skb_reserve(skb, local->hw.extra_tx_headroom);
1087
1088         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1089         memset(mgmt, 0, 24 + 6);
1090         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1091                                           IEEE80211_STYPE_AUTH);
1092         memcpy(mgmt->da, da, ETH_ALEN);
1093         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1094         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1095         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1096         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1097         mgmt->u.auth.status_code = cpu_to_le16(status);
1098         if (extra)
1099                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1100
1101         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1102                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1103                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1104                 WARN_ON(err);
1105         }
1106
1107         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1108                                         tx_flags;
1109         ieee80211_tx_skb(sdata, skb);
1110 }
1111
1112 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1113                                     const u8 *bssid, u16 stype, u16 reason,
1114                                     bool send_frame, u8 *frame_buf)
1115 {
1116         struct ieee80211_local *local = sdata->local;
1117         struct sk_buff *skb;
1118         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1119
1120         /* build frame */
1121         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1122         mgmt->duration = 0; /* initialize only */
1123         mgmt->seq_ctrl = 0; /* initialize only */
1124         memcpy(mgmt->da, bssid, ETH_ALEN);
1125         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1126         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1127         /* u.deauth.reason_code == u.disassoc.reason_code */
1128         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1129
1130         if (send_frame) {
1131                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1132                                     IEEE80211_DEAUTH_FRAME_LEN);
1133                 if (!skb)
1134                         return;
1135
1136                 skb_reserve(skb, local->hw.extra_tx_headroom);
1137
1138                 /* copy in frame */
1139                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1140                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1141
1142                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1143                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1144                         IEEE80211_SKB_CB(skb)->flags |=
1145                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1146
1147                 ieee80211_tx_skb(sdata, skb);
1148         }
1149 }
1150
1151 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1152                              size_t buffer_len, const u8 *ie, size_t ie_len,
1153                              enum ieee80211_band band, u32 rate_mask,
1154                              u8 channel)
1155 {
1156         struct ieee80211_supported_band *sband;
1157         u8 *pos = buffer, *end = buffer + buffer_len;
1158         size_t offset = 0, noffset;
1159         int supp_rates_len, i;
1160         u8 rates[32];
1161         int num_rates;
1162         int ext_rates_len;
1163
1164         sband = local->hw.wiphy->bands[band];
1165         if (WARN_ON_ONCE(!sband))
1166                 return 0;
1167
1168         num_rates = 0;
1169         for (i = 0; i < sband->n_bitrates; i++) {
1170                 if ((BIT(i) & rate_mask) == 0)
1171                         continue; /* skip rate */
1172                 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1173         }
1174
1175         supp_rates_len = min_t(int, num_rates, 8);
1176
1177         if (end - pos < 2 + supp_rates_len)
1178                 goto out_err;
1179         *pos++ = WLAN_EID_SUPP_RATES;
1180         *pos++ = supp_rates_len;
1181         memcpy(pos, rates, supp_rates_len);
1182         pos += supp_rates_len;
1183
1184         /* insert "request information" if in custom IEs */
1185         if (ie && ie_len) {
1186                 static const u8 before_extrates[] = {
1187                         WLAN_EID_SSID,
1188                         WLAN_EID_SUPP_RATES,
1189                         WLAN_EID_REQUEST,
1190                 };
1191                 noffset = ieee80211_ie_split(ie, ie_len,
1192                                              before_extrates,
1193                                              ARRAY_SIZE(before_extrates),
1194                                              offset);
1195                 if (end - pos < noffset - offset)
1196                         goto out_err;
1197                 memcpy(pos, ie + offset, noffset - offset);
1198                 pos += noffset - offset;
1199                 offset = noffset;
1200         }
1201
1202         ext_rates_len = num_rates - supp_rates_len;
1203         if (ext_rates_len > 0) {
1204                 if (end - pos < 2 + ext_rates_len)
1205                         goto out_err;
1206                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1207                 *pos++ = ext_rates_len;
1208                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1209                 pos += ext_rates_len;
1210         }
1211
1212         if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1213                 if (end - pos < 3)
1214                         goto out_err;
1215                 *pos++ = WLAN_EID_DS_PARAMS;
1216                 *pos++ = 1;
1217                 *pos++ = channel;
1218         }
1219
1220         /* insert custom IEs that go before HT */
1221         if (ie && ie_len) {
1222                 static const u8 before_ht[] = {
1223                         WLAN_EID_SSID,
1224                         WLAN_EID_SUPP_RATES,
1225                         WLAN_EID_REQUEST,
1226                         WLAN_EID_EXT_SUPP_RATES,
1227                         WLAN_EID_DS_PARAMS,
1228                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1229                 };
1230                 noffset = ieee80211_ie_split(ie, ie_len,
1231                                              before_ht, ARRAY_SIZE(before_ht),
1232                                              offset);
1233                 if (end - pos < noffset - offset)
1234                         goto out_err;
1235                 memcpy(pos, ie + offset, noffset - offset);
1236                 pos += noffset - offset;
1237                 offset = noffset;
1238         }
1239
1240         if (sband->ht_cap.ht_supported) {
1241                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1242                         goto out_err;
1243                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1244                                                 sband->ht_cap.cap);
1245         }
1246
1247         /*
1248          * If adding more here, adjust code in main.c
1249          * that calculates local->scan_ies_len.
1250          */
1251
1252         /* add any remaining custom IEs */
1253         if (ie && ie_len) {
1254                 noffset = ie_len;
1255                 if (end - pos < noffset - offset)
1256                         goto out_err;
1257                 memcpy(pos, ie + offset, noffset - offset);
1258                 pos += noffset - offset;
1259         }
1260
1261         if (sband->vht_cap.vht_supported) {
1262                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1263                         goto out_err;
1264                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1265                                                  sband->vht_cap.cap);
1266         }
1267
1268         return pos - buffer;
1269  out_err:
1270         WARN_ONCE(1, "not enough space for preq IEs\n");
1271         return pos - buffer;
1272 }
1273
1274 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1275                                           u8 *dst, u32 ratemask,
1276                                           struct ieee80211_channel *chan,
1277                                           const u8 *ssid, size_t ssid_len,
1278                                           const u8 *ie, size_t ie_len,
1279                                           bool directed)
1280 {
1281         struct ieee80211_local *local = sdata->local;
1282         struct sk_buff *skb;
1283         struct ieee80211_mgmt *mgmt;
1284         u8 chan_no;
1285         int ies_len;
1286
1287         /*
1288          * Do not send DS Channel parameter for directed probe requests
1289          * in order to maximize the chance that we get a response.  Some
1290          * badly-behaved APs don't respond when this parameter is included.
1291          */
1292         if (directed)
1293                 chan_no = 0;
1294         else
1295                 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1296
1297         skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1298                                      ssid, ssid_len, 100 + ie_len);
1299         if (!skb)
1300                 return NULL;
1301
1302         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1303                                            skb_tailroom(skb),
1304                                            ie, ie_len, chan->band,
1305                                            ratemask, chan_no);
1306         skb_put(skb, ies_len);
1307
1308         if (dst) {
1309                 mgmt = (struct ieee80211_mgmt *) skb->data;
1310                 memcpy(mgmt->da, dst, ETH_ALEN);
1311                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1312         }
1313
1314         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1315
1316         return skb;
1317 }
1318
1319 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1320                               const u8 *ssid, size_t ssid_len,
1321                               const u8 *ie, size_t ie_len,
1322                               u32 ratemask, bool directed, u32 tx_flags,
1323                               struct ieee80211_channel *channel, bool scan)
1324 {
1325         struct sk_buff *skb;
1326
1327         skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1328                                         ssid, ssid_len,
1329                                         ie, ie_len, directed);
1330         if (skb) {
1331                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1332                 if (scan)
1333                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1334                 else
1335                         ieee80211_tx_skb(sdata, skb);
1336         }
1337 }
1338
1339 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1340                             struct ieee802_11_elems *elems,
1341                             enum ieee80211_band band, u32 *basic_rates)
1342 {
1343         struct ieee80211_supported_band *sband;
1344         struct ieee80211_rate *bitrates;
1345         size_t num_rates;
1346         u32 supp_rates;
1347         int i, j;
1348         sband = local->hw.wiphy->bands[band];
1349
1350         if (WARN_ON(!sband))
1351                 return 1;
1352
1353         bitrates = sband->bitrates;
1354         num_rates = sband->n_bitrates;
1355         supp_rates = 0;
1356         for (i = 0; i < elems->supp_rates_len +
1357                      elems->ext_supp_rates_len; i++) {
1358                 u8 rate = 0;
1359                 int own_rate;
1360                 bool is_basic;
1361                 if (i < elems->supp_rates_len)
1362                         rate = elems->supp_rates[i];
1363                 else if (elems->ext_supp_rates)
1364                         rate = elems->ext_supp_rates
1365                                 [i - elems->supp_rates_len];
1366                 own_rate = 5 * (rate & 0x7f);
1367                 is_basic = !!(rate & 0x80);
1368
1369                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1370                         continue;
1371
1372                 for (j = 0; j < num_rates; j++) {
1373                         if (bitrates[j].bitrate == own_rate) {
1374                                 supp_rates |= BIT(j);
1375                                 if (basic_rates && is_basic)
1376                                         *basic_rates |= BIT(j);
1377                         }
1378                 }
1379         }
1380         return supp_rates;
1381 }
1382
1383 void ieee80211_stop_device(struct ieee80211_local *local)
1384 {
1385         ieee80211_led_radio(local, false);
1386         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1387
1388         cancel_work_sync(&local->reconfig_filter);
1389
1390         flush_workqueue(local->workqueue);
1391         drv_stop(local);
1392 }
1393
1394 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1395                                      struct ieee80211_sub_if_data *sdata)
1396 {
1397         struct ieee80211_chanctx_conf *conf;
1398         struct ieee80211_chanctx *ctx;
1399
1400         if (!local->use_chanctx)
1401                 return;
1402
1403         mutex_lock(&local->chanctx_mtx);
1404         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1405                                          lockdep_is_held(&local->chanctx_mtx));
1406         if (conf) {
1407                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1408                 drv_assign_vif_chanctx(local, sdata, ctx);
1409         }
1410         mutex_unlock(&local->chanctx_mtx);
1411 }
1412
1413 int ieee80211_reconfig(struct ieee80211_local *local)
1414 {
1415         struct ieee80211_hw *hw = &local->hw;
1416         struct ieee80211_sub_if_data *sdata;
1417         struct ieee80211_chanctx *ctx;
1418         struct sta_info *sta;
1419         int res, i;
1420         bool reconfig_due_to_wowlan = false;
1421
1422 #ifdef CONFIG_PM
1423         if (local->suspended)
1424                 local->resuming = true;
1425
1426         if (local->wowlan) {
1427                 local->wowlan = false;
1428                 res = drv_resume(local);
1429                 if (res < 0) {
1430                         local->resuming = false;
1431                         return res;
1432                 }
1433                 if (res == 0)
1434                         goto wake_up;
1435                 WARN_ON(res > 1);
1436                 /*
1437                  * res is 1, which means the driver requested
1438                  * to go through a regular reset on wakeup.
1439                  */
1440                 reconfig_due_to_wowlan = true;
1441         }
1442 #endif
1443         /* everything else happens only if HW was up & running */
1444         if (!local->open_count)
1445                 goto wake_up;
1446
1447         /*
1448          * Upon resume hardware can sometimes be goofy due to
1449          * various platform / driver / bus issues, so restarting
1450          * the device may at times not work immediately. Propagate
1451          * the error.
1452          */
1453         res = drv_start(local);
1454         if (res) {
1455                 WARN(local->suspended, "Hardware became unavailable "
1456                      "upon resume. This could be a software issue "
1457                      "prior to suspend or a hardware issue.\n");
1458                 return res;
1459         }
1460
1461         /* setup fragmentation threshold */
1462         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1463
1464         /* setup RTS threshold */
1465         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1466
1467         /* reset coverage class */
1468         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1469
1470         ieee80211_led_radio(local, true);
1471         ieee80211_mod_tpt_led_trig(local,
1472                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1473
1474         /* add interfaces */
1475         sdata = rtnl_dereference(local->monitor_sdata);
1476         if (sdata) {
1477                 res = drv_add_interface(local, sdata);
1478                 if (WARN_ON(res)) {
1479                         rcu_assign_pointer(local->monitor_sdata, NULL);
1480                         synchronize_net();
1481                         kfree(sdata);
1482                 }
1483         }
1484
1485         list_for_each_entry(sdata, &local->interfaces, list) {
1486                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1487                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1488                     ieee80211_sdata_running(sdata))
1489                         res = drv_add_interface(local, sdata);
1490         }
1491
1492         /* add channel contexts */
1493         if (local->use_chanctx) {
1494                 mutex_lock(&local->chanctx_mtx);
1495                 list_for_each_entry(ctx, &local->chanctx_list, list)
1496                         WARN_ON(drv_add_chanctx(local, ctx));
1497                 mutex_unlock(&local->chanctx_mtx);
1498         }
1499
1500         list_for_each_entry(sdata, &local->interfaces, list) {
1501                 if (!ieee80211_sdata_running(sdata))
1502                         continue;
1503                 ieee80211_assign_chanctx(local, sdata);
1504         }
1505
1506         sdata = rtnl_dereference(local->monitor_sdata);
1507         if (sdata && ieee80211_sdata_running(sdata))
1508                 ieee80211_assign_chanctx(local, sdata);
1509
1510         /* add STAs back */
1511         mutex_lock(&local->sta_mtx);
1512         list_for_each_entry(sta, &local->sta_list, list) {
1513                 enum ieee80211_sta_state state;
1514
1515                 if (!sta->uploaded)
1516                         continue;
1517
1518                 /* AP-mode stations will be added later */
1519                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1520                         continue;
1521
1522                 for (state = IEEE80211_STA_NOTEXIST;
1523                      state < sta->sta_state; state++)
1524                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1525                                               state + 1));
1526         }
1527         mutex_unlock(&local->sta_mtx);
1528
1529         /* reconfigure tx conf */
1530         if (hw->queues >= IEEE80211_NUM_ACS) {
1531                 list_for_each_entry(sdata, &local->interfaces, list) {
1532                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1533                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1534                             !ieee80211_sdata_running(sdata))
1535                                 continue;
1536
1537                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1538                                 drv_conf_tx(local, sdata, i,
1539                                             &sdata->tx_conf[i]);
1540                 }
1541         }
1542
1543         /* reconfigure hardware */
1544         ieee80211_hw_config(local, ~0);
1545
1546         ieee80211_configure_filter(local);
1547
1548         /* Finally also reconfigure all the BSS information */
1549         list_for_each_entry(sdata, &local->interfaces, list) {
1550                 u32 changed;
1551
1552                 if (!ieee80211_sdata_running(sdata))
1553                         continue;
1554
1555                 /* common change flags for all interface types */
1556                 changed = BSS_CHANGED_ERP_CTS_PROT |
1557                           BSS_CHANGED_ERP_PREAMBLE |
1558                           BSS_CHANGED_ERP_SLOT |
1559                           BSS_CHANGED_HT |
1560                           BSS_CHANGED_BASIC_RATES |
1561                           BSS_CHANGED_BEACON_INT |
1562                           BSS_CHANGED_BSSID |
1563                           BSS_CHANGED_CQM |
1564                           BSS_CHANGED_QOS |
1565                           BSS_CHANGED_IDLE |
1566                           BSS_CHANGED_TXPOWER;
1567
1568                 switch (sdata->vif.type) {
1569                 case NL80211_IFTYPE_STATION:
1570                         changed |= BSS_CHANGED_ASSOC |
1571                                    BSS_CHANGED_ARP_FILTER |
1572                                    BSS_CHANGED_PS;
1573
1574                         if (sdata->u.mgd.dtim_period)
1575                                 changed |= BSS_CHANGED_DTIM_PERIOD;
1576
1577                         mutex_lock(&sdata->u.mgd.mtx);
1578                         ieee80211_bss_info_change_notify(sdata, changed);
1579                         mutex_unlock(&sdata->u.mgd.mtx);
1580                         break;
1581                 case NL80211_IFTYPE_ADHOC:
1582                         changed |= BSS_CHANGED_IBSS;
1583                         /* fall through */
1584                 case NL80211_IFTYPE_AP:
1585                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1586
1587                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1588                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1589
1590                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1591                                         drv_start_ap(local, sdata);
1592                         }
1593
1594                         /* fall through */
1595                 case NL80211_IFTYPE_MESH_POINT:
1596                         if (sdata->vif.bss_conf.enable_beacon) {
1597                                 changed |= BSS_CHANGED_BEACON |
1598                                            BSS_CHANGED_BEACON_ENABLED;
1599                                 ieee80211_bss_info_change_notify(sdata, changed);
1600                         }
1601                         break;
1602                 case NL80211_IFTYPE_WDS:
1603                         break;
1604                 case NL80211_IFTYPE_AP_VLAN:
1605                 case NL80211_IFTYPE_MONITOR:
1606                         /* ignore virtual */
1607                         break;
1608                 case NL80211_IFTYPE_P2P_DEVICE:
1609                         changed = BSS_CHANGED_IDLE;
1610                         break;
1611                 case NL80211_IFTYPE_UNSPECIFIED:
1612                 case NUM_NL80211_IFTYPES:
1613                 case NL80211_IFTYPE_P2P_CLIENT:
1614                 case NL80211_IFTYPE_P2P_GO:
1615                         WARN_ON(1);
1616                         break;
1617                 }
1618         }
1619
1620         ieee80211_recalc_ps(local, -1);
1621
1622         /*
1623          * The sta might be in psm against the ap (e.g. because
1624          * this was the state before a hw restart), so we
1625          * explicitly send a null packet in order to make sure
1626          * it'll sync against the ap (and get out of psm).
1627          */
1628         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1629                 list_for_each_entry(sdata, &local->interfaces, list) {
1630                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1631                                 continue;
1632                         if (!sdata->u.mgd.associated)
1633                                 continue;
1634
1635                         ieee80211_send_nullfunc(local, sdata, 0);
1636                 }
1637         }
1638
1639         /* APs are now beaconing, add back stations */
1640         mutex_lock(&local->sta_mtx);
1641         list_for_each_entry(sta, &local->sta_list, list) {
1642                 enum ieee80211_sta_state state;
1643
1644                 if (!sta->uploaded)
1645                         continue;
1646
1647                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1648                         continue;
1649
1650                 for (state = IEEE80211_STA_NOTEXIST;
1651                      state < sta->sta_state; state++)
1652                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1653                                               state + 1));
1654         }
1655         mutex_unlock(&local->sta_mtx);
1656
1657         /* add back keys */
1658         list_for_each_entry(sdata, &local->interfaces, list)
1659                 if (ieee80211_sdata_running(sdata))
1660                         ieee80211_enable_keys(sdata);
1661
1662  wake_up:
1663         local->in_reconfig = false;
1664         barrier();
1665
1666         /*
1667          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1668          * sessions can be established after a resume.
1669          *
1670          * Also tear down aggregation sessions since reconfiguring
1671          * them in a hardware restart scenario is not easily done
1672          * right now, and the hardware will have lost information
1673          * about the sessions, but we and the AP still think they
1674          * are active. This is really a workaround though.
1675          */
1676         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1677                 mutex_lock(&local->sta_mtx);
1678
1679                 list_for_each_entry(sta, &local->sta_list, list) {
1680                         ieee80211_sta_tear_down_BA_sessions(
1681                                         sta, AGG_STOP_LOCAL_REQUEST);
1682                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1683                 }
1684
1685                 mutex_unlock(&local->sta_mtx);
1686         }
1687
1688         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1689                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1690
1691         /*
1692          * If this is for hw restart things are still running.
1693          * We may want to change that later, however.
1694          */
1695         if (!local->suspended || reconfig_due_to_wowlan)
1696                 drv_restart_complete(local);
1697
1698         if (!local->suspended)
1699                 return 0;
1700
1701 #ifdef CONFIG_PM
1702         /* first set suspended false, then resuming */
1703         local->suspended = false;
1704         mb();
1705         local->resuming = false;
1706
1707         mod_timer(&local->sta_cleanup, jiffies + 1);
1708 #else
1709         WARN_ON(1);
1710 #endif
1711         return 0;
1712 }
1713
1714 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1715 {
1716         struct ieee80211_sub_if_data *sdata;
1717         struct ieee80211_local *local;
1718         struct ieee80211_key *key;
1719
1720         if (WARN_ON(!vif))
1721                 return;
1722
1723         sdata = vif_to_sdata(vif);
1724         local = sdata->local;
1725
1726         if (WARN_ON(!local->resuming))
1727                 return;
1728
1729         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1730                 return;
1731
1732         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1733
1734         mutex_lock(&local->key_mtx);
1735         list_for_each_entry(key, &sdata->key_list, list)
1736                 key->flags |= KEY_FLAG_TAINTED;
1737         mutex_unlock(&local->key_mtx);
1738 }
1739 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1740
1741 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1742 {
1743         struct ieee80211_local *local = sdata->local;
1744         struct ieee80211_chanctx_conf *chanctx_conf;
1745         struct ieee80211_chanctx *chanctx;
1746
1747         mutex_lock(&local->chanctx_mtx);
1748
1749         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1750                                         lockdep_is_held(&local->chanctx_mtx));
1751
1752         if (WARN_ON_ONCE(!chanctx_conf))
1753                 goto unlock;
1754
1755         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1756         ieee80211_recalc_smps_chanctx(local, chanctx);
1757  unlock:
1758         mutex_unlock(&local->chanctx_mtx);
1759 }
1760
1761 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1762 {
1763         int i;
1764
1765         for (i = 0; i < n_ids; i++)
1766                 if (ids[i] == id)
1767                         return true;
1768         return false;
1769 }
1770
1771 /**
1772  * ieee80211_ie_split - split an IE buffer according to ordering
1773  *
1774  * @ies: the IE buffer
1775  * @ielen: the length of the IE buffer
1776  * @ids: an array with element IDs that are allowed before
1777  *      the split
1778  * @n_ids: the size of the element ID array
1779  * @offset: offset where to start splitting in the buffer
1780  *
1781  * This function splits an IE buffer by updating the @offset
1782  * variable to point to the location where the buffer should be
1783  * split.
1784  *
1785  * It assumes that the given IE buffer is well-formed, this
1786  * has to be guaranteed by the caller!
1787  *
1788  * It also assumes that the IEs in the buffer are ordered
1789  * correctly, if not the result of using this function will not
1790  * be ordered correctly either, i.e. it does no reordering.
1791  *
1792  * The function returns the offset where the next part of the
1793  * buffer starts, which may be @ielen if the entire (remainder)
1794  * of the buffer should be used.
1795  */
1796 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1797                           const u8 *ids, int n_ids, size_t offset)
1798 {
1799         size_t pos = offset;
1800
1801         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1802                 pos += 2 + ies[pos + 1];
1803
1804         return pos;
1805 }
1806
1807 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1808 {
1809         size_t pos = offset;
1810
1811         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1812                 pos += 2 + ies[pos + 1];
1813
1814         return pos;
1815 }
1816
1817 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1818                                             int rssi_min_thold,
1819                                             int rssi_max_thold)
1820 {
1821         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1822
1823         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1824                 return;
1825
1826         /*
1827          * Scale up threshold values before storing it, as the RSSI averaging
1828          * algorithm uses a scaled up value as well. Change this scaling
1829          * factor if the RSSI averaging algorithm changes.
1830          */
1831         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1832         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1833 }
1834
1835 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1836                                     int rssi_min_thold,
1837                                     int rssi_max_thold)
1838 {
1839         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1840
1841         WARN_ON(rssi_min_thold == rssi_max_thold ||
1842                 rssi_min_thold > rssi_max_thold);
1843
1844         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1845                                        rssi_max_thold);
1846 }
1847 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1848
1849 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1850 {
1851         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1852
1853         _ieee80211_enable_rssi_reports(sdata, 0, 0);
1854 }
1855 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1856
1857 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1858                               u16 cap)
1859 {
1860         __le16 tmp;
1861
1862         *pos++ = WLAN_EID_HT_CAPABILITY;
1863         *pos++ = sizeof(struct ieee80211_ht_cap);
1864         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1865
1866         /* capability flags */
1867         tmp = cpu_to_le16(cap);
1868         memcpy(pos, &tmp, sizeof(u16));
1869         pos += sizeof(u16);
1870
1871         /* AMPDU parameters */
1872         *pos++ = ht_cap->ampdu_factor |
1873                  (ht_cap->ampdu_density <<
1874                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1875
1876         /* MCS set */
1877         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1878         pos += sizeof(ht_cap->mcs);
1879
1880         /* extended capabilities */
1881         pos += sizeof(__le16);
1882
1883         /* BF capabilities */
1884         pos += sizeof(__le32);
1885
1886         /* antenna selection */
1887         pos += sizeof(u8);
1888
1889         return pos;
1890 }
1891
1892 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1893                                u32 cap)
1894 {
1895         __le32 tmp;
1896
1897         *pos++ = WLAN_EID_VHT_CAPABILITY;
1898         *pos++ = sizeof(struct ieee80211_vht_cap);
1899         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1900
1901         /* capability flags */
1902         tmp = cpu_to_le32(cap);
1903         memcpy(pos, &tmp, sizeof(u32));
1904         pos += sizeof(u32);
1905
1906         /* VHT MCS set */
1907         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1908         pos += sizeof(vht_cap->vht_mcs);
1909
1910         return pos;
1911 }
1912
1913 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1914                                const struct cfg80211_chan_def *chandef,
1915                                u16 prot_mode)
1916 {
1917         struct ieee80211_ht_operation *ht_oper;
1918         /* Build HT Information */
1919         *pos++ = WLAN_EID_HT_OPERATION;
1920         *pos++ = sizeof(struct ieee80211_ht_operation);
1921         ht_oper = (struct ieee80211_ht_operation *)pos;
1922         ht_oper->primary_chan = ieee80211_frequency_to_channel(
1923                                         chandef->chan->center_freq);
1924         switch (chandef->width) {
1925         case NL80211_CHAN_WIDTH_160:
1926         case NL80211_CHAN_WIDTH_80P80:
1927         case NL80211_CHAN_WIDTH_80:
1928         case NL80211_CHAN_WIDTH_40:
1929                 if (chandef->center_freq1 > chandef->chan->center_freq)
1930                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1931                 else
1932                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1933                 break;
1934         default:
1935                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1936                 break;
1937         }
1938         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1939             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1940             chandef->width != NL80211_CHAN_WIDTH_20)
1941                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1942
1943         ht_oper->operation_mode = cpu_to_le16(prot_mode);
1944         ht_oper->stbc_param = 0x0000;
1945
1946         /* It seems that Basic MCS set and Supported MCS set
1947            are identical for the first 10 bytes */
1948         memset(&ht_oper->basic_set, 0, 16);
1949         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1950
1951         return pos + sizeof(struct ieee80211_ht_operation);
1952 }
1953
1954 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1955                                   const struct ieee80211_ht_operation *ht_oper,
1956                                   struct cfg80211_chan_def *chandef)
1957 {
1958         enum nl80211_channel_type channel_type;
1959
1960         if (!ht_oper) {
1961                 cfg80211_chandef_create(chandef, control_chan,
1962                                         NL80211_CHAN_NO_HT);
1963                 return;
1964         }
1965
1966         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1967         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1968                 channel_type = NL80211_CHAN_HT20;
1969                 break;
1970         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1971                 channel_type = NL80211_CHAN_HT40PLUS;
1972                 break;
1973         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1974                 channel_type = NL80211_CHAN_HT40MINUS;
1975                 break;
1976         default:
1977                 channel_type = NL80211_CHAN_NO_HT;
1978         }
1979
1980         cfg80211_chandef_create(chandef, control_chan, channel_type);
1981 }
1982
1983 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1984                             struct sk_buff *skb, bool need_basic,
1985                             enum ieee80211_band band)
1986 {
1987         struct ieee80211_local *local = sdata->local;
1988         struct ieee80211_supported_band *sband;
1989         int rate;
1990         u8 i, rates, *pos;
1991         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1992
1993         sband = local->hw.wiphy->bands[band];
1994         rates = sband->n_bitrates;
1995         if (rates > 8)
1996                 rates = 8;
1997
1998         if (skb_tailroom(skb) < rates + 2)
1999                 return -ENOMEM;
2000
2001         pos = skb_put(skb, rates + 2);
2002         *pos++ = WLAN_EID_SUPP_RATES;
2003         *pos++ = rates;
2004         for (i = 0; i < rates; i++) {
2005                 u8 basic = 0;
2006                 if (need_basic && basic_rates & BIT(i))
2007                         basic = 0x80;
2008                 rate = sband->bitrates[i].bitrate;
2009                 *pos++ = basic | (u8) (rate / 5);
2010         }
2011
2012         return 0;
2013 }
2014
2015 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2016                                 struct sk_buff *skb, bool need_basic,
2017                                 enum ieee80211_band band)
2018 {
2019         struct ieee80211_local *local = sdata->local;
2020         struct ieee80211_supported_band *sband;
2021         int rate;
2022         u8 i, exrates, *pos;
2023         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2024
2025         sband = local->hw.wiphy->bands[band];
2026         exrates = sband->n_bitrates;
2027         if (exrates > 8)
2028                 exrates -= 8;
2029         else
2030                 exrates = 0;
2031
2032         if (skb_tailroom(skb) < exrates + 2)
2033                 return -ENOMEM;
2034
2035         if (exrates) {
2036                 pos = skb_put(skb, exrates + 2);
2037                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2038                 *pos++ = exrates;
2039                 for (i = 8; i < sband->n_bitrates; i++) {
2040                         u8 basic = 0;
2041                         if (need_basic && basic_rates & BIT(i))
2042                                 basic = 0x80;
2043                         rate = sband->bitrates[i].bitrate;
2044                         *pos++ = basic | (u8) (rate / 5);
2045                 }
2046         }
2047         return 0;
2048 }
2049
2050 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2051 {
2052         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2053         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2054
2055         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2056                 /* non-managed type inferfaces */
2057                 return 0;
2058         }
2059         return ifmgd->ave_beacon_signal;
2060 }
2061 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2062
2063 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2064 {
2065         if (!mcs)
2066                 return 1;
2067
2068         /* TODO: consider rx_highest */
2069
2070         if (mcs->rx_mask[3])
2071                 return 4;
2072         if (mcs->rx_mask[2])
2073                 return 3;
2074         if (mcs->rx_mask[1])
2075                 return 2;
2076         return 1;
2077 }
2078
2079 /**
2080  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2081  * @local: mac80211 hw info struct
2082  * @status: RX status
2083  * @mpdu_len: total MPDU length (including FCS)
2084  * @mpdu_offset: offset into MPDU to calculate timestamp at
2085  *
2086  * This function calculates the RX timestamp at the given MPDU offset, taking
2087  * into account what the RX timestamp was. An offset of 0 will just normalize
2088  * the timestamp to TSF at beginning of MPDU reception.
2089  */
2090 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2091                                      struct ieee80211_rx_status *status,
2092                                      unsigned int mpdu_len,
2093                                      unsigned int mpdu_offset)
2094 {
2095         u64 ts = status->mactime;
2096         struct rate_info ri;
2097         u16 rate;
2098
2099         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2100                 return 0;
2101
2102         memset(&ri, 0, sizeof(ri));
2103
2104         /* Fill cfg80211 rate info */
2105         if (status->flag & RX_FLAG_HT) {
2106                 ri.mcs = status->rate_idx;
2107                 ri.flags |= RATE_INFO_FLAGS_MCS;
2108                 if (status->flag & RX_FLAG_40MHZ)
2109                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2110                 if (status->flag & RX_FLAG_SHORT_GI)
2111                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2112         } else if (status->flag & RX_FLAG_VHT) {
2113                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2114                 ri.mcs = status->rate_idx;
2115                 ri.nss = status->vht_nss;
2116                 if (status->flag & RX_FLAG_40MHZ)
2117                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2118                 if (status->flag & RX_FLAG_80MHZ)
2119                         ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2120                 if (status->flag & RX_FLAG_80P80MHZ)
2121                         ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2122                 if (status->flag & RX_FLAG_160MHZ)
2123                         ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2124                 if (status->flag & RX_FLAG_SHORT_GI)
2125                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2126         } else {
2127                 struct ieee80211_supported_band *sband;
2128
2129                 sband = local->hw.wiphy->bands[status->band];
2130                 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2131         }
2132
2133         rate = cfg80211_calculate_bitrate(&ri);
2134
2135         /* rewind from end of MPDU */
2136         if (status->flag & RX_FLAG_MACTIME_END)
2137                 ts -= mpdu_len * 8 * 10 / rate;
2138
2139         ts += mpdu_offset * 8 * 10 / rate;
2140
2141         return ts;
2142 }
2143
2144 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2145 {
2146         struct ieee80211_sub_if_data *sdata;
2147
2148         mutex_lock(&local->iflist_mtx);
2149         list_for_each_entry(sdata, &local->interfaces, list) {
2150                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2151
2152                 if (sdata->wdev.cac_started) {
2153                         ieee80211_vif_release_channel(sdata);
2154                         cfg80211_cac_event(sdata->dev,
2155                                            NL80211_RADAR_CAC_ABORTED,
2156                                            GFP_KERNEL);
2157                 }
2158         }
2159         mutex_unlock(&local->iflist_mtx);
2160 }
2161
2162 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2163 {
2164         struct ieee80211_local *local =
2165                 container_of(work, struct ieee80211_local, radar_detected_work);
2166         struct cfg80211_chan_def chandef;
2167
2168         ieee80211_dfs_cac_cancel(local);
2169
2170         if (local->use_chanctx)
2171                 /* currently not handled */
2172                 WARN_ON(1);
2173         else {
2174                 cfg80211_chandef_create(&chandef, local->hw.conf.channel,
2175                                         local->hw.conf.channel_type);
2176                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2177         }
2178 }
2179
2180 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2181 {
2182         struct ieee80211_local *local = hw_to_local(hw);
2183
2184         trace_api_radar_detected(local);
2185
2186         ieee80211_queue_work(hw, &local->radar_detected_work);
2187 }
2188 EXPORT_SYMBOL(ieee80211_radar_detected);