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 = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 489                        &local->queue_stop_reasons[queue]);
 490         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 491         return ret;
 492 }
 493 EXPORT_SYMBOL(ieee80211_queue_stopped);
 494
 495 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 496                                      unsigned long queues,
 497                                      enum queue_stop_reason reason)
 498 {
 499         struct ieee80211_local *local = hw_to_local(hw);
 500         unsigned long flags;
 501         int i;
 502
 503         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 504
 505         for_each_set_bit(i, &queues, hw->queues)
 506                 __ieee80211_wake_queue(hw, i, reason);
 507
 508         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 509 }
 510
 511 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 512 {
 513         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 514                                         IEEE80211_QUEUE_STOP_REASON_DRIVER);
 515 }
 516 EXPORT_SYMBOL(ieee80211_wake_queues);
 517
 518 void ieee80211_flush_queues(struct ieee80211_local *local,
 519                             struct ieee80211_sub_if_data *sdata)
 520 {
 521         u32 queues;
 522
 523         if (!local->ops->flush)
 524                 return;
 525
 526         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
 527                 int ac;
 528
 529                 queues = 0;
 530
 531                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 532                         queues |= BIT(sdata->vif.hw_queue[ac]);
 533                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 534                         queues |= BIT(sdata->vif.cab_queue);
 535         } else {
 536                 /* all queues */
 537                 queues = BIT(local->hw.queues) - 1;
 538         }
 539
 540         ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
 541                                         IEEE80211_QUEUE_STOP_REASON_FLUSH);
 542
 543         drv_flush(local, queues, false);
 544
 545         ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
 546                                         IEEE80211_QUEUE_STOP_REASON_FLUSH);
 547 }
 548
 549 void ieee80211_iterate_active_interfaces(
 550         struct ieee80211_hw *hw, u32 iter_flags,
 551         void (*iterator)(void *data, u8 *mac,
 552                          struct ieee80211_vif *vif),
 553         void *data)
 554 {
 555         struct ieee80211_local *local = hw_to_local(hw);
 556         struct ieee80211_sub_if_data *sdata;
 557
 558         mutex_lock(&local->iflist_mtx);
 559
 560         list_for_each_entry(sdata, &local->interfaces, list) {
 561                 switch (sdata->vif.type) {
 562                 case NL80211_IFTYPE_MONITOR:
 563                 case NL80211_IFTYPE_AP_VLAN:
 564                         continue;
 565                 default:
 566                         break;
 567                 }
 568                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 569                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 570                         continue;
 571                 if (ieee80211_sdata_running(sdata))
 572                         iterator(data, sdata->vif.addr,
 573                                  &sdata->vif);
 574         }
 575
 576         sdata = rcu_dereference_protected(local->monitor_sdata,
 577                                           lockdep_is_held(&local->iflist_mtx));
 578         if (sdata &&
 579             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 580              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 581                 iterator(data, sdata->vif.addr, &sdata->vif);
 582
 583         mutex_unlock(&local->iflist_mtx);
 584 }
 585 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
 586
 587 void ieee80211_iterate_active_interfaces_atomic(
 588         struct ieee80211_hw *hw, u32 iter_flags,
 589         void (*iterator)(void *data, u8 *mac,
 590                          struct ieee80211_vif *vif),
 591         void *data)
 592 {
 593         struct ieee80211_local *local = hw_to_local(hw);
 594         struct ieee80211_sub_if_data *sdata;
 595
 596         rcu_read_lock();
 597
 598         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 599                 switch (sdata->vif.type) {
 600                 case NL80211_IFTYPE_MONITOR:
 601                 case NL80211_IFTYPE_AP_VLAN:
 602                         continue;
 603                 default:
 604                         break;
 605                 }
 606                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 607                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 608                         continue;
 609                 if (ieee80211_sdata_running(sdata))
 610                         iterator(data, sdata->vif.addr,
 611                                  &sdata->vif);
 612         }
 613
 614         sdata = rcu_dereference(local->monitor_sdata);
 615         if (sdata &&
 616             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 617              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 618                 iterator(data, sdata->vif.addr, &sdata->vif);
 619
 620         rcu_read_unlock();
 621 }
 622 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 623
 624 /*
 625  * Nothing should have been stuffed into the workqueue during
 626  * the suspend->resume cycle. If this WARN is seen then there
 627  * is a bug with either the driver suspend or something in
 628  * mac80211 stuffing into the workqueue which we haven't yet
 629  * cleared during mac80211's suspend cycle.
 630  */
 631 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 632 {
 633         if (WARN(local->suspended && !local->resuming,
 634                  "queueing ieee80211 work while going to suspend\n"))
 635                 return false;
 636
 637         return true;
 638 }
 639
 640 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 641 {
 642         struct ieee80211_local *local = hw_to_local(hw);
 643
 644         if (!ieee80211_can_queue_work(local))
 645                 return;
 646
 647         queue_work(local->workqueue, work);
 648 }
 649 EXPORT_SYMBOL(ieee80211_queue_work);
 650
 651 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 652                                   struct delayed_work *dwork,
 653                                   unsigned long delay)
 654 {
 655         struct ieee80211_local *local = hw_to_local(hw);
 656
 657         if (!ieee80211_can_queue_work(local))
 658                 return;
 659
 660         queue_delayed_work(local->workqueue, dwork, delay);
 661 }
 662 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 663
 664 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
 665                                struct ieee802_11_elems *elems,
 666                                u64 filter, u32 crc)
 667 {
 668         size_t left = len;
 669         u8 *pos = start;
 670         bool calc_crc = filter != 0;
 671         DECLARE_BITMAP(seen_elems, 256);
 672
 673         bitmap_zero(seen_elems, 256);
 674         memset(elems, 0, sizeof(*elems));
 675         elems->ie_start = start;
 676         elems->total_len = len;
 677
 678         while (left >= 2) {
 679                 u8 id, elen;
 680                 bool elem_parse_failed;
 681
 682                 id = *pos++;
 683                 elen = *pos++;
 684                 left -= 2;
 685
 686                 if (elen > left) {
 687                         elems->parse_error = true;
 688                         break;
 689                 }
 690
 691                 switch (id) {
 692                 case WLAN_EID_SSID:
 693                 case WLAN_EID_SUPP_RATES:
 694                 case WLAN_EID_FH_PARAMS:
 695                 case WLAN_EID_DS_PARAMS:
 696                 case WLAN_EID_CF_PARAMS:
 697                 case WLAN_EID_TIM:
 698                 case WLAN_EID_IBSS_PARAMS:
 699                 case WLAN_EID_CHALLENGE:
 700                 case WLAN_EID_RSN:
 701                 case WLAN_EID_ERP_INFO:
 702                 case WLAN_EID_EXT_SUPP_RATES:
 703                 case WLAN_EID_HT_CAPABILITY:
 704                 case WLAN_EID_HT_OPERATION:
 705                 case WLAN_EID_VHT_CAPABILITY:
 706                 case WLAN_EID_VHT_OPERATION:
 707                 case WLAN_EID_MESH_ID:
 708                 case WLAN_EID_MESH_CONFIG:
 709                 case WLAN_EID_PEER_MGMT:
 710                 case WLAN_EID_PREQ:
 711                 case WLAN_EID_PREP:
 712                 case WLAN_EID_PERR:
 713                 case WLAN_EID_RANN:
 714                 case WLAN_EID_CHANNEL_SWITCH:
 715                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 716                 case WLAN_EID_COUNTRY:
 717                 case WLAN_EID_PWR_CONSTRAINT:
 718                 case WLAN_EID_TIMEOUT_INTERVAL:
 719                         if (test_bit(id, seen_elems)) {
 720                                 elems->parse_error = true;
 721                                 left -= elen;
 722                                 pos += elen;
 723                                 continue;
 724                         }
 725                         break;
 726                 }
 727
 728                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 729                         crc = crc32_be(crc, pos - 2, elen + 2);
 730
 731                 elem_parse_failed = false;
 732
 733                 switch (id) {
 734                 case WLAN_EID_SSID:
 735                         elems->ssid = pos;
 736                         elems->ssid_len = elen;
 737                         break;
 738                 case WLAN_EID_SUPP_RATES:
 739                         elems->supp_rates = pos;
 740                         elems->supp_rates_len = elen;
 741                         break;
 742                 case WLAN_EID_DS_PARAMS:
 743                         if (elen >= 1)
 744                                 elems->ds_params = pos;
 745                         else
 746                                 elem_parse_failed = true;
 747                         break;
 748                 case WLAN_EID_TIM:
 749                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 750                                 elems->tim = (void *)pos;
 751                                 elems->tim_len = elen;
 752                         } else
 753                                 elem_parse_failed = true;
 754                         break;
 755                 case WLAN_EID_CHALLENGE:
 756                         elems->challenge = pos;
 757                         elems->challenge_len = elen;
 758                         break;
 759                 case WLAN_EID_VENDOR_SPECIFIC:
 760                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 761                             pos[2] == 0xf2) {
 762                                 /* Microsoft OUI (00:50:F2) */
 763
 764                                 if (calc_crc)
 765                                         crc = crc32_be(crc, pos - 2, elen + 2);
 766
 767                                 if (elen >= 5 && pos[3] == 2) {
 768                                         /* OUI Type 2 - WMM IE */
 769                                         if (pos[4] == 0) {
 770                                                 elems->wmm_info = pos;
 771                                                 elems->wmm_info_len = elen;
 772                                         } else if (pos[4] == 1) {
 773                                                 elems->wmm_param = pos;
 774                                                 elems->wmm_param_len = elen;
 775                                         }
 776                                 }
 777                         }
 778                         break;
 779                 case WLAN_EID_RSN:
 780                         elems->rsn = pos;
 781                         elems->rsn_len = elen;
 782                         break;
 783                 case WLAN_EID_ERP_INFO:
 784                         if (elen >= 1)
 785                                 elems->erp_info = pos;
 786                         else
 787                                 elem_parse_failed = true;
 788                         break;
 789                 case WLAN_EID_EXT_SUPP_RATES:
 790                         elems->ext_supp_rates = pos;
 791                         elems->ext_supp_rates_len = elen;
 792                         break;
 793                 case WLAN_EID_HT_CAPABILITY:
 794                         if (elen >= sizeof(struct ieee80211_ht_cap))
 795                                 elems->ht_cap_elem = (void *)pos;
 796                         else
 797                                 elem_parse_failed = true;
 798                         break;
 799                 case WLAN_EID_HT_OPERATION:
 800                         if (elen >= sizeof(struct ieee80211_ht_operation))
 801                                 elems->ht_operation = (void *)pos;
 802                         else
 803                                 elem_parse_failed = true;
 804                         break;
 805                 case WLAN_EID_VHT_CAPABILITY:
 806                         if (elen >= sizeof(struct ieee80211_vht_cap))
 807                                 elems->vht_cap_elem = (void *)pos;
 808                         else
 809                                 elem_parse_failed = true;
 810                         break;
 811                 case WLAN_EID_VHT_OPERATION:
 812                         if (elen >= sizeof(struct ieee80211_vht_operation))
 813                                 elems->vht_operation = (void *)pos;
 814                         else
 815                                 elem_parse_failed = true;
 816                         break;
 817                 case WLAN_EID_OPMODE_NOTIF:
 818                         if (elen > 0)
 819                                 elems->opmode_notif = pos;
 820                         else
 821                                 elem_parse_failed = true;
 822                         break;
 823                 case WLAN_EID_MESH_ID:
 824                         elems->mesh_id = pos;
 825                         elems->mesh_id_len = elen;
 826                         break;
 827                 case WLAN_EID_MESH_CONFIG:
 828                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 829                                 elems->mesh_config = (void *)pos;
 830                         else
 831                                 elem_parse_failed = true;
 832                         break;
 833                 case WLAN_EID_PEER_MGMT:
 834                         elems->peering = pos;
 835                         elems->peering_len = elen;
 836                         break;
 837                 case WLAN_EID_MESH_AWAKE_WINDOW:
 838                         if (elen >= 2)
 839                                 elems->awake_window = (void *)pos;
 840                         break;
 841                 case WLAN_EID_PREQ:
 842                         elems->preq = pos;
 843                         elems->preq_len = elen;
 844                         break;
 845                 case WLAN_EID_PREP:
 846                         elems->prep = pos;
 847                         elems->prep_len = elen;
 848                         break;
 849                 case WLAN_EID_PERR:
 850                         elems->perr = pos;
 851                         elems->perr_len = elen;
 852                         break;
 853                 case WLAN_EID_RANN:
 854                         if (elen >= sizeof(struct ieee80211_rann_ie))
 855                                 elems->rann = (void *)pos;
 856                         else
 857                                 elem_parse_failed = true;
 858                         break;
 859                 case WLAN_EID_CHANNEL_SWITCH:
 860                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 861                                 elem_parse_failed = true;
 862                                 break;
 863                         }
 864                         elems->ch_switch_ie = (void *)pos;
 865                         break;
 866                 case WLAN_EID_COUNTRY:
 867                         elems->country_elem = pos;
 868                         elems->country_elem_len = elen;
 869                         break;
 870                 case WLAN_EID_PWR_CONSTRAINT:
 871                         if (elen != 1) {
 872                                 elem_parse_failed = true;
 873                                 break;
 874                         }
 875                         elems->pwr_constr_elem = pos;
 876                         break;
 877                 case WLAN_EID_TIMEOUT_INTERVAL:
 878                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
 879                                 elems->timeout_int = (void *)pos;
 880                         else
 881                                 elem_parse_failed = true;
 882                         break;
 883                 default:
 884                         break;
 885                 }
 886
 887                 if (elem_parse_failed)
 888                         elems->parse_error = true;
 889                 else
 890                         __set_bit(id, seen_elems);
 891
 892                 left -= elen;
 893                 pos += elen;
 894         }
 895
 896         if (left != 0)
 897                 elems->parse_error = true;
 898
 899         return crc;
 900 }
 901
 902 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
 903                                bool bss_notify)
 904 {
 905         struct ieee80211_local *local = sdata->local;
 906         struct ieee80211_tx_queue_params qparam;
 907         struct ieee80211_chanctx_conf *chanctx_conf;
 908         int ac;
 909         bool use_11b, enable_qos;
 910         int aCWmin, aCWmax;
 911
 912         if (!local->ops->conf_tx)
 913                 return;
 914
 915         if (local->hw.queues < IEEE80211_NUM_ACS)
 916                 return;
 917
 918         memset(&qparam, 0, sizeof(qparam));
 919
 920         rcu_read_lock();
 921         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 922         use_11b = (chanctx_conf &&
 923                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
 924                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
 925         rcu_read_unlock();
 926
 927         /*
 928          * By default disable QoS in STA mode for old access points, which do
 929          * not support 802.11e. New APs will provide proper queue parameters,
 930          * that we will configure later.
 931          */
 932         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
 933
 934         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 935                 /* Set defaults according to 802.11-2007 Table 7-37 */
 936                 aCWmax = 1023;
 937                 if (use_11b)
 938                         aCWmin = 31;
 939                 else
 940                         aCWmin = 15;
 941
 942                 if (enable_qos) {
 943                         switch (ac) {
 944                         case IEEE80211_AC_BK:
 945                                 qparam.cw_max = aCWmax;
 946                                 qparam.cw_min = aCWmin;
 947                                 qparam.txop = 0;
 948                                 qparam.aifs = 7;
 949                                 break;
 950                         /* never happens but let's not leave undefined */
 951                         default:
 952                         case IEEE80211_AC_BE:
 953                                 qparam.cw_max = aCWmax;
 954                                 qparam.cw_min = aCWmin;
 955                                 qparam.txop = 0;
 956                                 qparam.aifs = 3;
 957                                 break;
 958                         case IEEE80211_AC_VI:
 959                                 qparam.cw_max = aCWmin;
 960                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
 961                                 if (use_11b)
 962                                         qparam.txop = 6016/32;
 963                                 else
 964                                         qparam.txop = 3008/32;
 965                                 qparam.aifs = 2;
 966                                 break;
 967                         case IEEE80211_AC_VO:
 968                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
 969                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
 970                                 if (use_11b)
 971                                         qparam.txop = 3264/32;
 972                                 else
 973                                         qparam.txop = 1504/32;
 974                                 qparam.aifs = 2;
 975                                 break;
 976                         }
 977                 } else {
 978                         /* Confiure old 802.11b/g medium access rules. */
 979                         qparam.cw_max = aCWmax;
 980                         qparam.cw_min = aCWmin;
 981                         qparam.txop = 0;
 982                         qparam.aifs = 2;
 983                 }
 984
 985                 qparam.uapsd = false;
 986
 987                 sdata->tx_conf[ac] = qparam;
 988                 drv_conf_tx(local, sdata, ac, &qparam);
 989         }
 990
 991         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
 992             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
 993                 sdata->vif.bss_conf.qos = enable_qos;
 994                 if (bss_notify)
 995                         ieee80211_bss_info_change_notify(sdata,
 996                                                          BSS_CHANGED_QOS);
 997         }
 998 }
 999
1000 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1001                                   const size_t supp_rates_len,
1002                                   const u8 *supp_rates)
1003 {
1004         struct ieee80211_chanctx_conf *chanctx_conf;
1005         int i, have_higher_than_11mbit = 0;
1006
1007         /* cf. IEEE 802.11 9.2.12 */
1008         for (i = 0; i < supp_rates_len; i++)
1009                 if ((supp_rates[i] & 0x7f) * 5 > 110)
1010                         have_higher_than_11mbit = 1;
1011
1012         rcu_read_lock();
1013         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1014
1015         if (chanctx_conf &&
1016             chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
1017             have_higher_than_11mbit)
1018                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1019         else
1020                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1021         rcu_read_unlock();
1022
1023         ieee80211_set_wmm_default(sdata, true);
1024 }
1025
1026 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1027                               enum ieee80211_band band)
1028 {
1029         struct ieee80211_supported_band *sband;
1030         struct ieee80211_rate *bitrates;
1031         u32 mandatory_rates;
1032         enum ieee80211_rate_flags mandatory_flag;
1033         int i;
1034
1035         sband = local->hw.wiphy->bands[band];
1036         if (WARN_ON(!sband))
1037                 return 1;
1038
1039         if (band == IEEE80211_BAND_2GHZ)
1040                 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1041         else
1042                 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1043
1044         bitrates = sband->bitrates;
1045         mandatory_rates = 0;
1046         for (i = 0; i < sband->n_bitrates; i++)
1047                 if (bitrates[i].flags & mandatory_flag)
1048                         mandatory_rates |= BIT(i);
1049         return mandatory_rates;
1050 }
1051
1052 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1053                          u16 transaction, u16 auth_alg, u16 status,
1054                          const u8 *extra, size_t extra_len, const u8 *da,
1055                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1056                          u32 tx_flags)
1057 {
1058         struct ieee80211_local *local = sdata->local;
1059         struct sk_buff *skb;
1060         struct ieee80211_mgmt *mgmt;
1061         int err;
1062
1063         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1064                             sizeof(*mgmt) + 6 + extra_len);
1065         if (!skb)
1066                 return;
1067
1068         skb_reserve(skb, local->hw.extra_tx_headroom);
1069
1070         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1071         memset(mgmt, 0, 24 + 6);
1072         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1073                                           IEEE80211_STYPE_AUTH);
1074         memcpy(mgmt->da, da, ETH_ALEN);
1075         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1076         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1077         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1078         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1079         mgmt->u.auth.status_code = cpu_to_le16(status);
1080         if (extra)
1081                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1082
1083         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1084                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1085                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1086                 WARN_ON(err);
1087         }
1088
1089         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1090                                         tx_flags;
1091         ieee80211_tx_skb(sdata, skb);
1092 }
1093
1094 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1095                                     const u8 *bssid, u16 stype, u16 reason,
1096                                     bool send_frame, u8 *frame_buf)
1097 {
1098         struct ieee80211_local *local = sdata->local;
1099         struct sk_buff *skb;
1100         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1101
1102         /* build frame */
1103         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1104         mgmt->duration = 0; /* initialize only */
1105         mgmt->seq_ctrl = 0; /* initialize only */
1106         memcpy(mgmt->da, bssid, ETH_ALEN);
1107         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1108         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1109         /* u.deauth.reason_code == u.disassoc.reason_code */
1110         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1111
1112         if (send_frame) {
1113                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1114                                     IEEE80211_DEAUTH_FRAME_LEN);
1115                 if (!skb)
1116                         return;
1117
1118                 skb_reserve(skb, local->hw.extra_tx_headroom);
1119
1120                 /* copy in frame */
1121                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1122                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1123
1124                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1125                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1126                         IEEE80211_SKB_CB(skb)->flags |=
1127                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1128
1129                 ieee80211_tx_skb(sdata, skb);
1130         }
1131 }
1132
1133 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1134                              size_t buffer_len, const u8 *ie, size_t ie_len,
1135                              enum ieee80211_band band, u32 rate_mask,
1136                              u8 channel)
1137 {
1138         struct ieee80211_supported_band *sband;
1139         u8 *pos = buffer, *end = buffer + buffer_len;
1140         size_t offset = 0, noffset;
1141         int supp_rates_len, i;
1142         u8 rates[32];
1143         int num_rates;
1144         int ext_rates_len;
1145
1146         sband = local->hw.wiphy->bands[band];
1147         if (WARN_ON_ONCE(!sband))
1148                 return 0;
1149
1150         num_rates = 0;
1151         for (i = 0; i < sband->n_bitrates; i++) {
1152                 if ((BIT(i) & rate_mask) == 0)
1153                         continue; /* skip rate */
1154                 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1155         }
1156
1157         supp_rates_len = min_t(int, num_rates, 8);
1158
1159         if (end - pos < 2 + supp_rates_len)
1160                 goto out_err;
1161         *pos++ = WLAN_EID_SUPP_RATES;
1162         *pos++ = supp_rates_len;
1163         memcpy(pos, rates, supp_rates_len);
1164         pos += supp_rates_len;
1165
1166         /* insert "request information" if in custom IEs */
1167         if (ie && ie_len) {
1168                 static const u8 before_extrates[] = {
1169                         WLAN_EID_SSID,
1170                         WLAN_EID_SUPP_RATES,
1171                         WLAN_EID_REQUEST,
1172                 };
1173                 noffset = ieee80211_ie_split(ie, ie_len,
1174                                              before_extrates,
1175                                              ARRAY_SIZE(before_extrates),
1176                                              offset);
1177                 if (end - pos < noffset - offset)
1178                         goto out_err;
1179                 memcpy(pos, ie + offset, noffset - offset);
1180                 pos += noffset - offset;
1181                 offset = noffset;
1182         }
1183
1184         ext_rates_len = num_rates - supp_rates_len;
1185         if (ext_rates_len > 0) {
1186                 if (end - pos < 2 + ext_rates_len)
1187                         goto out_err;
1188                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1189                 *pos++ = ext_rates_len;
1190                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1191                 pos += ext_rates_len;
1192         }
1193
1194         if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1195                 if (end - pos < 3)
1196                         goto out_err;
1197                 *pos++ = WLAN_EID_DS_PARAMS;
1198                 *pos++ = 1;
1199                 *pos++ = channel;
1200         }
1201
1202         /* insert custom IEs that go before HT */
1203         if (ie && ie_len) {
1204                 static const u8 before_ht[] = {
1205                         WLAN_EID_SSID,
1206                         WLAN_EID_SUPP_RATES,
1207                         WLAN_EID_REQUEST,
1208                         WLAN_EID_EXT_SUPP_RATES,
1209                         WLAN_EID_DS_PARAMS,
1210                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1211                 };
1212                 noffset = ieee80211_ie_split(ie, ie_len,
1213                                              before_ht, ARRAY_SIZE(before_ht),
1214                                              offset);
1215                 if (end - pos < noffset - offset)
1216                         goto out_err;
1217                 memcpy(pos, ie + offset, noffset - offset);
1218                 pos += noffset - offset;
1219                 offset = noffset;
1220         }
1221
1222         if (sband->ht_cap.ht_supported) {
1223                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1224                         goto out_err;
1225                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1226                                                 sband->ht_cap.cap);
1227         }
1228
1229         /*
1230          * If adding more here, adjust code in main.c
1231          * that calculates local->scan_ies_len.
1232          */
1233
1234         /* add any remaining custom IEs */
1235         if (ie && ie_len) {
1236                 noffset = ie_len;
1237                 if (end - pos < noffset - offset)
1238                         goto out_err;
1239                 memcpy(pos, ie + offset, noffset - offset);
1240                 pos += noffset - offset;
1241         }
1242
1243         if (sband->vht_cap.vht_supported) {
1244                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1245                         goto out_err;
1246                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1247                                                  sband->vht_cap.cap);
1248         }
1249
1250         return pos - buffer;
1251  out_err:
1252         WARN_ONCE(1, "not enough space for preq IEs\n");
1253         return pos - buffer;
1254 }
1255
1256 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1257                                           u8 *dst, u32 ratemask,
1258                                           struct ieee80211_channel *chan,
1259                                           const u8 *ssid, size_t ssid_len,
1260                                           const u8 *ie, size_t ie_len,
1261                                           bool directed)
1262 {
1263         struct ieee80211_local *local = sdata->local;
1264         struct sk_buff *skb;
1265         struct ieee80211_mgmt *mgmt;
1266         u8 chan_no;
1267         int ies_len;
1268
1269         /*
1270          * Do not send DS Channel parameter for directed probe requests
1271          * in order to maximize the chance that we get a response.  Some
1272          * badly-behaved APs don't respond when this parameter is included.
1273          */
1274         if (directed)
1275                 chan_no = 0;
1276         else
1277                 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1278
1279         skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1280                                      ssid, ssid_len, 100 + ie_len);
1281         if (!skb)
1282                 return NULL;
1283
1284         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1285                                            skb_tailroom(skb),
1286                                            ie, ie_len, chan->band,
1287                                            ratemask, chan_no);
1288         skb_put(skb, ies_len);
1289
1290         if (dst) {
1291                 mgmt = (struct ieee80211_mgmt *) skb->data;
1292                 memcpy(mgmt->da, dst, ETH_ALEN);
1293                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1294         }
1295
1296         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1297
1298         return skb;
1299 }
1300
1301 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1302                               const u8 *ssid, size_t ssid_len,
1303                               const u8 *ie, size_t ie_len,
1304                               u32 ratemask, bool directed, u32 tx_flags,
1305                               struct ieee80211_channel *channel, bool scan)
1306 {
1307         struct sk_buff *skb;
1308
1309         skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1310                                         ssid, ssid_len,
1311                                         ie, ie_len, directed);
1312         if (skb) {
1313                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1314                 if (scan)
1315                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1316                 else
1317                         ieee80211_tx_skb(sdata, skb);
1318         }
1319 }
1320
1321 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1322                             struct ieee802_11_elems *elems,
1323                             enum ieee80211_band band, u32 *basic_rates)
1324 {
1325         struct ieee80211_supported_band *sband;
1326         struct ieee80211_rate *bitrates;
1327         size_t num_rates;
1328         u32 supp_rates;
1329         int i, j;
1330         sband = local->hw.wiphy->bands[band];
1331
1332         if (WARN_ON(!sband))
1333                 return 1;
1334
1335         bitrates = sband->bitrates;
1336         num_rates = sband->n_bitrates;
1337         supp_rates = 0;
1338         for (i = 0; i < elems->supp_rates_len +
1339                      elems->ext_supp_rates_len; i++) {
1340                 u8 rate = 0;
1341                 int own_rate;
1342                 bool is_basic;
1343                 if (i < elems->supp_rates_len)
1344                         rate = elems->supp_rates[i];
1345                 else if (elems->ext_supp_rates)
1346                         rate = elems->ext_supp_rates
1347                                 [i - elems->supp_rates_len];
1348                 own_rate = 5 * (rate & 0x7f);
1349                 is_basic = !!(rate & 0x80);
1350
1351                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1352                         continue;
1353
1354                 for (j = 0; j < num_rates; j++) {
1355                         if (bitrates[j].bitrate == own_rate) {
1356                                 supp_rates |= BIT(j);
1357                                 if (basic_rates && is_basic)
1358                                         *basic_rates |= BIT(j);
1359                         }
1360                 }
1361         }
1362         return supp_rates;
1363 }
1364
1365 void ieee80211_stop_device(struct ieee80211_local *local)
1366 {
1367         ieee80211_led_radio(local, false);
1368         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1369
1370         cancel_work_sync(&local->reconfig_filter);
1371
1372         flush_workqueue(local->workqueue);
1373         drv_stop(local);
1374 }
1375
1376 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1377                                      struct ieee80211_sub_if_data *sdata)
1378 {
1379         struct ieee80211_chanctx_conf *conf;
1380         struct ieee80211_chanctx *ctx;
1381
1382         if (!local->use_chanctx)
1383                 return;
1384
1385         mutex_lock(&local->chanctx_mtx);
1386         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1387                                          lockdep_is_held(&local->chanctx_mtx));
1388         if (conf) {
1389                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1390                 drv_assign_vif_chanctx(local, sdata, ctx);
1391         }
1392         mutex_unlock(&local->chanctx_mtx);
1393 }
1394
1395 int ieee80211_reconfig(struct ieee80211_local *local)
1396 {
1397         struct ieee80211_hw *hw = &local->hw;
1398         struct ieee80211_sub_if_data *sdata;
1399         struct ieee80211_chanctx *ctx;
1400         struct sta_info *sta;
1401         int res, i;
1402         bool reconfig_due_to_wowlan = false;
1403
1404 #ifdef CONFIG_PM
1405         if (local->suspended)
1406                 local->resuming = true;
1407
1408         if (local->wowlan) {
1409                 local->wowlan = false;
1410                 res = drv_resume(local);
1411                 if (res < 0) {
1412                         local->resuming = false;
1413                         return res;
1414                 }
1415                 if (res == 0)
1416                         goto wake_up;
1417                 WARN_ON(res > 1);
1418                 /*
1419                  * res is 1, which means the driver requested
1420                  * to go through a regular reset on wakeup.
1421                  */
1422                 reconfig_due_to_wowlan = true;
1423         }
1424 #endif
1425         /* everything else happens only if HW was up & running */
1426         if (!local->open_count)
1427                 goto wake_up;
1428
1429         /*
1430          * Upon resume hardware can sometimes be goofy due to
1431          * various platform / driver / bus issues, so restarting
1432          * the device may at times not work immediately. Propagate
1433          * the error.
1434          */
1435         res = drv_start(local);
1436         if (res) {
1437                 WARN(local->suspended, "Hardware became unavailable "
1438                      "upon resume. This could be a software issue "
1439                      "prior to suspend or a hardware issue.\n");
1440                 return res;
1441         }
1442
1443         /* setup fragmentation threshold */
1444         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1445
1446         /* setup RTS threshold */
1447         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1448
1449         /* reset coverage class */
1450         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1451
1452         ieee80211_led_radio(local, true);
1453         ieee80211_mod_tpt_led_trig(local,
1454                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1455
1456         /* add interfaces */
1457         sdata = rtnl_dereference(local->monitor_sdata);
1458         if (sdata) {
1459                 /* in HW restart it exists already */
1460                 WARN_ON(local->resuming);
1461                 res = drv_add_interface(local, sdata);
1462                 if (WARN_ON(res)) {
1463                         rcu_assign_pointer(local->monitor_sdata, NULL);
1464                         synchronize_net();
1465                         kfree(sdata);
1466                 }
1467         }
1468
1469         list_for_each_entry(sdata, &local->interfaces, list) {
1470                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1471                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1472                     ieee80211_sdata_running(sdata))
1473                         res = drv_add_interface(local, sdata);
1474         }
1475
1476         /* add channel contexts */
1477         if (local->use_chanctx) {
1478                 mutex_lock(&local->chanctx_mtx);
1479                 list_for_each_entry(ctx, &local->chanctx_list, list)
1480                         WARN_ON(drv_add_chanctx(local, ctx));
1481                 mutex_unlock(&local->chanctx_mtx);
1482         }
1483
1484         list_for_each_entry(sdata, &local->interfaces, list) {
1485                 if (!ieee80211_sdata_running(sdata))
1486                         continue;
1487                 ieee80211_assign_chanctx(local, sdata);
1488         }
1489
1490         sdata = rtnl_dereference(local->monitor_sdata);
1491         if (sdata && ieee80211_sdata_running(sdata))
1492                 ieee80211_assign_chanctx(local, sdata);
1493
1494         /* add STAs back */
1495         mutex_lock(&local->sta_mtx);
1496         list_for_each_entry(sta, &local->sta_list, list) {
1497                 enum ieee80211_sta_state state;
1498
1499                 if (!sta->uploaded)
1500                         continue;
1501
1502                 /* AP-mode stations will be added later */
1503                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1504                         continue;
1505
1506                 for (state = IEEE80211_STA_NOTEXIST;
1507                      state < sta->sta_state; state++)
1508                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1509                                               state + 1));
1510         }
1511         mutex_unlock(&local->sta_mtx);
1512
1513         /* reconfigure tx conf */
1514         if (hw->queues >= IEEE80211_NUM_ACS) {
1515                 list_for_each_entry(sdata, &local->interfaces, list) {
1516                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1517                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1518                             !ieee80211_sdata_running(sdata))
1519                                 continue;
1520
1521                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1522                                 drv_conf_tx(local, sdata, i,
1523                                             &sdata->tx_conf[i]);
1524                 }
1525         }
1526
1527         /* reconfigure hardware */
1528         ieee80211_hw_config(local, ~0);
1529
1530         ieee80211_configure_filter(local);
1531
1532         /* Finally also reconfigure all the BSS information */
1533         list_for_each_entry(sdata, &local->interfaces, list) {
1534                 u32 changed;
1535
1536                 if (!ieee80211_sdata_running(sdata))
1537                         continue;
1538
1539                 /* common change flags for all interface types */
1540                 changed = BSS_CHANGED_ERP_CTS_PROT |
1541                           BSS_CHANGED_ERP_PREAMBLE |
1542                           BSS_CHANGED_ERP_SLOT |
1543                           BSS_CHANGED_HT |
1544                           BSS_CHANGED_BASIC_RATES |
1545                           BSS_CHANGED_BEACON_INT |
1546                           BSS_CHANGED_BSSID |
1547                           BSS_CHANGED_CQM |
1548                           BSS_CHANGED_QOS |
1549                           BSS_CHANGED_IDLE |
1550                           BSS_CHANGED_TXPOWER;
1551
1552                 switch (sdata->vif.type) {
1553                 case NL80211_IFTYPE_STATION:
1554                         changed |= BSS_CHANGED_ASSOC |
1555                                    BSS_CHANGED_ARP_FILTER |
1556                                    BSS_CHANGED_PS;
1557
1558                         if (sdata->u.mgd.dtim_period)
1559                                 changed |= BSS_CHANGED_DTIM_PERIOD;
1560
1561                         mutex_lock(&sdata->u.mgd.mtx);
1562                         ieee80211_bss_info_change_notify(sdata, changed);
1563                         mutex_unlock(&sdata->u.mgd.mtx);
1564                         break;
1565                 case NL80211_IFTYPE_ADHOC:
1566                         changed |= BSS_CHANGED_IBSS;
1567                         /* fall through */
1568                 case NL80211_IFTYPE_AP:
1569                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1570
1571                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1572                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1573
1574                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1575                                         drv_start_ap(local, sdata);
1576                         }
1577
1578                         /* fall through */
1579                 case NL80211_IFTYPE_MESH_POINT:
1580                         if (sdata->vif.bss_conf.enable_beacon) {
1581                                 changed |= BSS_CHANGED_BEACON |
1582                                            BSS_CHANGED_BEACON_ENABLED;
1583                                 ieee80211_bss_info_change_notify(sdata, changed);
1584                         }
1585                         break;
1586                 case NL80211_IFTYPE_WDS:
1587                         break;
1588                 case NL80211_IFTYPE_AP_VLAN:
1589                 case NL80211_IFTYPE_MONITOR:
1590                         /* ignore virtual */
1591                         break;
1592                 case NL80211_IFTYPE_P2P_DEVICE:
1593                         changed = BSS_CHANGED_IDLE;
1594                         break;
1595                 case NL80211_IFTYPE_UNSPECIFIED:
1596                 case NUM_NL80211_IFTYPES:
1597                 case NL80211_IFTYPE_P2P_CLIENT:
1598                 case NL80211_IFTYPE_P2P_GO:
1599                         WARN_ON(1);
1600                         break;
1601                 }
1602         }
1603
1604         ieee80211_recalc_ps(local, -1);
1605
1606         /*
1607          * The sta might be in psm against the ap (e.g. because
1608          * this was the state before a hw restart), so we
1609          * explicitly send a null packet in order to make sure
1610          * it'll sync against the ap (and get out of psm).
1611          */
1612         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1613                 list_for_each_entry(sdata, &local->interfaces, list) {
1614                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1615                                 continue;
1616                         if (!sdata->u.mgd.associated)
1617                                 continue;
1618
1619                         ieee80211_send_nullfunc(local, sdata, 0);
1620                 }
1621         }
1622
1623         /* APs are now beaconing, add back stations */
1624         mutex_lock(&local->sta_mtx);
1625         list_for_each_entry(sta, &local->sta_list, list) {
1626                 enum ieee80211_sta_state state;
1627
1628                 if (!sta->uploaded)
1629                         continue;
1630
1631                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1632                         continue;
1633
1634                 for (state = IEEE80211_STA_NOTEXIST;
1635                      state < sta->sta_state; state++)
1636                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1637                                               state + 1));
1638         }
1639         mutex_unlock(&local->sta_mtx);
1640
1641         /* add back keys */
1642         list_for_each_entry(sdata, &local->interfaces, list)
1643                 if (ieee80211_sdata_running(sdata))
1644                         ieee80211_enable_keys(sdata);
1645
1646  wake_up:
1647         local->in_reconfig = false;
1648         barrier();
1649
1650         if (local->monitors == local->open_count && local->monitors > 0)
1651                 ieee80211_add_virtual_monitor(local);
1652
1653         /*
1654          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1655          * sessions can be established after a resume.
1656          *
1657          * Also tear down aggregation sessions since reconfiguring
1658          * them in a hardware restart scenario is not easily done
1659          * right now, and the hardware will have lost information
1660          * about the sessions, but we and the AP still think they
1661          * are active. This is really a workaround though.
1662          */
1663         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1664                 mutex_lock(&local->sta_mtx);
1665
1666                 list_for_each_entry(sta, &local->sta_list, list) {
1667                         ieee80211_sta_tear_down_BA_sessions(
1668                                         sta, AGG_STOP_LOCAL_REQUEST);
1669                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1670                 }
1671
1672                 mutex_unlock(&local->sta_mtx);
1673         }
1674
1675         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1676                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1677
1678         /*
1679          * If this is for hw restart things are still running.
1680          * We may want to change that later, however.
1681          */
1682         if (!local->suspended || reconfig_due_to_wowlan)
1683                 drv_restart_complete(local);
1684
1685         if (!local->suspended)
1686                 return 0;
1687
1688 #ifdef CONFIG_PM
1689         /* first set suspended false, then resuming */
1690         local->suspended = false;
1691         mb();
1692         local->resuming = false;
1693
1694         mod_timer(&local->sta_cleanup, jiffies + 1);
1695 #else
1696         WARN_ON(1);
1697 #endif
1698         return 0;
1699 }
1700
1701 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1702 {
1703         struct ieee80211_sub_if_data *sdata;
1704         struct ieee80211_local *local;
1705         struct ieee80211_key *key;
1706
1707         if (WARN_ON(!vif))
1708                 return;
1709
1710         sdata = vif_to_sdata(vif);
1711         local = sdata->local;
1712
1713         if (WARN_ON(!local->resuming))
1714                 return;
1715
1716         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1717                 return;
1718
1719         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1720
1721         mutex_lock(&local->key_mtx);
1722         list_for_each_entry(key, &sdata->key_list, list)
1723                 key->flags |= KEY_FLAG_TAINTED;
1724         mutex_unlock(&local->key_mtx);
1725 }
1726 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1727
1728 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1729 {
1730         struct ieee80211_local *local = sdata->local;
1731         struct ieee80211_chanctx_conf *chanctx_conf;
1732         struct ieee80211_chanctx *chanctx;
1733
1734         mutex_lock(&local->chanctx_mtx);
1735
1736         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1737                                         lockdep_is_held(&local->chanctx_mtx));
1738
1739         if (WARN_ON_ONCE(!chanctx_conf))
1740                 goto unlock;
1741
1742         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1743         ieee80211_recalc_smps_chanctx(local, chanctx);
1744  unlock:
1745         mutex_unlock(&local->chanctx_mtx);
1746 }
1747
1748 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1749 {
1750         int i;
1751
1752         for (i = 0; i < n_ids; i++)
1753                 if (ids[i] == id)
1754                         return true;
1755         return false;
1756 }
1757
1758 /**
1759  * ieee80211_ie_split - split an IE buffer according to ordering
1760  *
1761  * @ies: the IE buffer
1762  * @ielen: the length of the IE buffer
1763  * @ids: an array with element IDs that are allowed before
1764  *      the split
1765  * @n_ids: the size of the element ID array
1766  * @offset: offset where to start splitting in the buffer
1767  *
1768  * This function splits an IE buffer by updating the @offset
1769  * variable to point to the location where the buffer should be
1770  * split.
1771  *
1772  * It assumes that the given IE buffer is well-formed, this
1773  * has to be guaranteed by the caller!
1774  *
1775  * It also assumes that the IEs in the buffer are ordered
1776  * correctly, if not the result of using this function will not
1777  * be ordered correctly either, i.e. it does no reordering.
1778  *
1779  * The function returns the offset where the next part of the
1780  * buffer starts, which may be @ielen if the entire (remainder)
1781  * of the buffer should be used.
1782  */
1783 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1784                           const u8 *ids, int n_ids, size_t offset)
1785 {
1786         size_t pos = offset;
1787
1788         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1789                 pos += 2 + ies[pos + 1];
1790
1791         return pos;
1792 }
1793
1794 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1795 {
1796         size_t pos = offset;
1797
1798         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1799                 pos += 2 + ies[pos + 1];
1800
1801         return pos;
1802 }
1803
1804 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1805                                             int rssi_min_thold,
1806                                             int rssi_max_thold)
1807 {
1808         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1809
1810         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1811                 return;
1812
1813         /*
1814          * Scale up threshold values before storing it, as the RSSI averaging
1815          * algorithm uses a scaled up value as well. Change this scaling
1816          * factor if the RSSI averaging algorithm changes.
1817          */
1818         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1819         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1820 }
1821
1822 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1823                                     int rssi_min_thold,
1824                                     int rssi_max_thold)
1825 {
1826         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1827
1828         WARN_ON(rssi_min_thold == rssi_max_thold ||
1829                 rssi_min_thold > rssi_max_thold);
1830
1831         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1832                                        rssi_max_thold);
1833 }
1834 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1835
1836 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1837 {
1838         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1839
1840         _ieee80211_enable_rssi_reports(sdata, 0, 0);
1841 }
1842 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1843
1844 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1845                               u16 cap)
1846 {
1847         __le16 tmp;
1848
1849         *pos++ = WLAN_EID_HT_CAPABILITY;
1850         *pos++ = sizeof(struct ieee80211_ht_cap);
1851         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1852
1853         /* capability flags */
1854         tmp = cpu_to_le16(cap);
1855         memcpy(pos, &tmp, sizeof(u16));
1856         pos += sizeof(u16);
1857
1858         /* AMPDU parameters */
1859         *pos++ = ht_cap->ampdu_factor |
1860                  (ht_cap->ampdu_density <<
1861                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1862
1863         /* MCS set */
1864         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1865         pos += sizeof(ht_cap->mcs);
1866
1867         /* extended capabilities */
1868         pos += sizeof(__le16);
1869
1870         /* BF capabilities */
1871         pos += sizeof(__le32);
1872
1873         /* antenna selection */
1874         pos += sizeof(u8);
1875
1876         return pos;
1877 }
1878
1879 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1880                                u32 cap)
1881 {
1882         __le32 tmp;
1883
1884         *pos++ = WLAN_EID_VHT_CAPABILITY;
1885         *pos++ = sizeof(struct ieee80211_vht_cap);
1886         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1887
1888         /* capability flags */
1889         tmp = cpu_to_le32(cap);
1890         memcpy(pos, &tmp, sizeof(u32));
1891         pos += sizeof(u32);
1892
1893         /* VHT MCS set */
1894         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1895         pos += sizeof(vht_cap->vht_mcs);
1896
1897         return pos;
1898 }
1899
1900 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1901                                const struct cfg80211_chan_def *chandef,
1902                                u16 prot_mode)
1903 {
1904         struct ieee80211_ht_operation *ht_oper;
1905         /* Build HT Information */
1906         *pos++ = WLAN_EID_HT_OPERATION;
1907         *pos++ = sizeof(struct ieee80211_ht_operation);
1908         ht_oper = (struct ieee80211_ht_operation *)pos;
1909         ht_oper->primary_chan = ieee80211_frequency_to_channel(
1910                                         chandef->chan->center_freq);
1911         switch (chandef->width) {
1912         case NL80211_CHAN_WIDTH_160:
1913         case NL80211_CHAN_WIDTH_80P80:
1914         case NL80211_CHAN_WIDTH_80:
1915         case NL80211_CHAN_WIDTH_40:
1916                 if (chandef->center_freq1 > chandef->chan->center_freq)
1917                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1918                 else
1919                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1920                 break;
1921         default:
1922                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1923                 break;
1924         }
1925         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1926             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1927             chandef->width != NL80211_CHAN_WIDTH_20)
1928                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1929
1930         ht_oper->operation_mode = cpu_to_le16(prot_mode);
1931         ht_oper->stbc_param = 0x0000;
1932
1933         /* It seems that Basic MCS set and Supported MCS set
1934            are identical for the first 10 bytes */
1935         memset(&ht_oper->basic_set, 0, 16);
1936         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1937
1938         return pos + sizeof(struct ieee80211_ht_operation);
1939 }
1940
1941 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1942                                   const struct ieee80211_ht_operation *ht_oper,
1943                                   struct cfg80211_chan_def *chandef)
1944 {
1945         enum nl80211_channel_type channel_type;
1946
1947         if (!ht_oper) {
1948                 cfg80211_chandef_create(chandef, control_chan,
1949                                         NL80211_CHAN_NO_HT);
1950                 return;
1951         }
1952
1953         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1954         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1955                 channel_type = NL80211_CHAN_HT20;
1956                 break;
1957         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1958                 channel_type = NL80211_CHAN_HT40PLUS;
1959                 break;
1960         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1961                 channel_type = NL80211_CHAN_HT40MINUS;
1962                 break;
1963         default:
1964                 channel_type = NL80211_CHAN_NO_HT;
1965         }
1966
1967         cfg80211_chandef_create(chandef, control_chan, channel_type);
1968 }
1969
1970 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1971                             struct sk_buff *skb, bool need_basic,
1972                             enum ieee80211_band band)
1973 {
1974         struct ieee80211_local *local = sdata->local;
1975         struct ieee80211_supported_band *sband;
1976         int rate;
1977         u8 i, rates, *pos;
1978         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1979
1980         sband = local->hw.wiphy->bands[band];
1981         rates = sband->n_bitrates;
1982         if (rates > 8)
1983                 rates = 8;
1984
1985         if (skb_tailroom(skb) < rates + 2)
1986                 return -ENOMEM;
1987
1988         pos = skb_put(skb, rates + 2);
1989         *pos++ = WLAN_EID_SUPP_RATES;
1990         *pos++ = rates;
1991         for (i = 0; i < rates; i++) {
1992                 u8 basic = 0;
1993                 if (need_basic && basic_rates & BIT(i))
1994                         basic = 0x80;
1995                 rate = sband->bitrates[i].bitrate;
1996                 *pos++ = basic | (u8) (rate / 5);
1997         }
1998
1999         return 0;
2000 }
2001
2002 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2003                                 struct sk_buff *skb, bool need_basic,
2004                                 enum ieee80211_band band)
2005 {
2006         struct ieee80211_local *local = sdata->local;
2007         struct ieee80211_supported_band *sband;
2008         int rate;
2009         u8 i, exrates, *pos;
2010         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2011
2012         sband = local->hw.wiphy->bands[band];
2013         exrates = sband->n_bitrates;
2014         if (exrates > 8)
2015                 exrates -= 8;
2016         else
2017                 exrates = 0;
2018
2019         if (skb_tailroom(skb) < exrates + 2)
2020                 return -ENOMEM;
2021
2022         if (exrates) {
2023                 pos = skb_put(skb, exrates + 2);
2024                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2025                 *pos++ = exrates;
2026                 for (i = 8; i < sband->n_bitrates; i++) {
2027                         u8 basic = 0;
2028                         if (need_basic && basic_rates & BIT(i))
2029                                 basic = 0x80;
2030                         rate = sband->bitrates[i].bitrate;
2031                         *pos++ = basic | (u8) (rate / 5);
2032                 }
2033         }
2034         return 0;
2035 }
2036
2037 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2038 {
2039         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2040         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2041
2042         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2043                 /* non-managed type inferfaces */
2044                 return 0;
2045         }
2046         return ifmgd->ave_beacon_signal / 16;
2047 }
2048 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2049
2050 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2051 {
2052         if (!mcs)
2053                 return 1;
2054
2055         /* TODO: consider rx_highest */
2056
2057         if (mcs->rx_mask[3])
2058                 return 4;
2059         if (mcs->rx_mask[2])
2060                 return 3;
2061         if (mcs->rx_mask[1])
2062                 return 2;
2063         return 1;
2064 }
2065
2066 /**
2067  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2068  * @local: mac80211 hw info struct
2069  * @status: RX status
2070  * @mpdu_len: total MPDU length (including FCS)
2071  * @mpdu_offset: offset into MPDU to calculate timestamp at
2072  *
2073  * This function calculates the RX timestamp at the given MPDU offset, taking
2074  * into account what the RX timestamp was. An offset of 0 will just normalize
2075  * the timestamp to TSF at beginning of MPDU reception.
2076  */
2077 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2078                                      struct ieee80211_rx_status *status,
2079                                      unsigned int mpdu_len,
2080                                      unsigned int mpdu_offset)
2081 {
2082         u64 ts = status->mactime;
2083         struct rate_info ri;
2084         u16 rate;
2085
2086         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2087                 return 0;
2088
2089         memset(&ri, 0, sizeof(ri));
2090
2091         /* Fill cfg80211 rate info */
2092         if (status->flag & RX_FLAG_HT) {
2093                 ri.mcs = status->rate_idx;
2094                 ri.flags |= RATE_INFO_FLAGS_MCS;
2095                 if (status->flag & RX_FLAG_40MHZ)
2096                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2097                 if (status->flag & RX_FLAG_SHORT_GI)
2098                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2099         } else if (status->flag & RX_FLAG_VHT) {
2100                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2101                 ri.mcs = status->rate_idx;
2102                 ri.nss = status->vht_nss;
2103                 if (status->flag & RX_FLAG_40MHZ)
2104                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2105                 if (status->flag & RX_FLAG_80MHZ)
2106                         ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2107                 if (status->flag & RX_FLAG_80P80MHZ)
2108                         ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2109                 if (status->flag & RX_FLAG_160MHZ)
2110                         ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2111                 if (status->flag & RX_FLAG_SHORT_GI)
2112                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2113         } else {
2114                 struct ieee80211_supported_band *sband;
2115
2116                 sband = local->hw.wiphy->bands[status->band];
2117                 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2118         }
2119
2120         rate = cfg80211_calculate_bitrate(&ri);
2121
2122         /* rewind from end of MPDU */
2123         if (status->flag & RX_FLAG_MACTIME_END)
2124                 ts -= mpdu_len * 8 * 10 / rate;
2125
2126         ts += mpdu_offset * 8 * 10 / rate;
2127
2128         return ts;
2129 }
2130
2131 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2132 {
2133         struct ieee80211_sub_if_data *sdata;
2134
2135         mutex_lock(&local->iflist_mtx);
2136         list_for_each_entry(sdata, &local->interfaces, list) {
2137                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2138
2139                 if (sdata->wdev.cac_started) {
2140                         ieee80211_vif_release_channel(sdata);
2141                         cfg80211_cac_event(sdata->dev,
2142                                            NL80211_RADAR_CAC_ABORTED,
2143                                            GFP_KERNEL);
2144                 }
2145         }
2146         mutex_unlock(&local->iflist_mtx);
2147 }
2148
2149 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2150 {
2151         struct ieee80211_local *local =
2152                 container_of(work, struct ieee80211_local, radar_detected_work);
2153         struct cfg80211_chan_def chandef;
2154
2155         ieee80211_dfs_cac_cancel(local);
2156
2157         if (local->use_chanctx)
2158                 /* currently not handled */
2159                 WARN_ON(1);
2160         else {
2161                 chandef = local->hw.conf.chandef;
2162                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2163         }
2164 }
2165
2166 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2167 {
2168         struct ieee80211_local *local = hw_to_local(hw);
2169
2170         trace_api_radar_detected(local);
2171
2172         ieee80211_queue_work(hw, &local->radar_detected_work);
2173 }
2174 EXPORT_SYMBOL(ieee80211_radar_detected);