net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/rtnetlink.h>
  20 #include <linux/pm_qos_params.h>
  21 #include <linux/crc32.h>
  22 #include <linux/slab.h>
  23 #include <net/mac80211.h>
  24 #include <asm/unaligned.h>
  25
  26 #include "ieee80211_i.h"
  27 #include "driver-ops.h"
  28 #include "rate.h"
  29 #include "led.h"
  30
  31 #define IEEE80211_MAX_PROBE_TRIES 5
  32
  33 /*
  34  * beacon loss detection timeout
  35  * XXX: should depend on beacon interval
  36  */
  37 #define IEEE80211_BEACON_LOSS_TIME      (2 * HZ)
  38 /*
  39  * Time the connection can be idle before we probe
  40  * it to see if we can still talk to the AP.
  41  */
  42 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  43 /*
  44  * Time we wait for a probe response after sending
  45  * a probe request because of beacon loss or for
  46  * checking the connection still works.
  47  */
  48 #define IEEE80211_PROBE_WAIT            (HZ / 2)
  49
  50 /*
  51  * Weight given to the latest Beacon frame when calculating average signal
  52  * strength for Beacon frames received in the current BSS. This must be
  53  * between 1 and 15.
  54  */
  55 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  56
  57 #define TMR_RUNNING_TIMER       0
  58 #define TMR_RUNNING_CHANSW      1
  59
  60 /*
  61  * All cfg80211 functions have to be called outside a locked
  62  * section so that they can acquire a lock themselves... This
  63  * is much simpler than queuing up things in cfg80211, but we
  64  * do need some indirection for that here.
  65  */
  66 enum rx_mgmt_action {
  67         /* no action required */
  68         RX_MGMT_NONE,
  69
  70         /* caller must call cfg80211_send_rx_auth() */
  71         RX_MGMT_CFG80211_AUTH,
  72
  73         /* caller must call cfg80211_send_rx_assoc() */
  74         RX_MGMT_CFG80211_ASSOC,
  75
  76         /* caller must call cfg80211_send_deauth() */
  77         RX_MGMT_CFG80211_DEAUTH,
  78
  79         /* caller must call cfg80211_send_disassoc() */
  80         RX_MGMT_CFG80211_DISASSOC,
  81
  82         /* caller must tell cfg80211 about internal error */
  83         RX_MGMT_CFG80211_ASSOC_ERROR,
  84 };
  85
  86 /* utils */
  87 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
  88 {
  89         WARN_ON(!mutex_is_locked(&ifmgd->mtx));
  90 }
  91
  92 /*
  93  * We can have multiple work items (and connection probing)
  94  * scheduling this timer, but we need to take care to only
  95  * reschedule it when it should fire _earlier_ than it was
  96  * asked for before, or if it's not pending right now. This
  97  * function ensures that. Note that it then is required to
  98  * run this function for all timeouts after the first one
  99  * has happened -- the work that runs from this timer will
 100  * do that.
 101  */
 102 static void run_again(struct ieee80211_if_managed *ifmgd,
 103                              unsigned long timeout)
 104 {
 105         ASSERT_MGD_MTX(ifmgd);
 106
 107         if (!timer_pending(&ifmgd->timer) ||
 108             time_before(timeout, ifmgd->timer.expires))
 109                 mod_timer(&ifmgd->timer, timeout);
 110 }
 111
 112 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
 113 {
 114         if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
 115                 return;
 116
 117         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 118                   round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
 119 }
 120
 121 static int ecw2cw(int ecw)
 122 {
 123         return (1 << ecw) - 1;
 124 }
 125
 126 /*
 127  * ieee80211_enable_ht should be called only after the operating band
 128  * has been determined as ht configuration depends on the hw's
 129  * HT abilities for a specific band.
 130  */
 131 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
 132                                struct ieee80211_ht_info *hti,
 133                                const u8 *bssid, u16 ap_ht_cap_flags)
 134 {
 135         struct ieee80211_local *local = sdata->local;
 136         struct ieee80211_supported_band *sband;
 137         struct sta_info *sta;
 138         u32 changed = 0;
 139         u16 ht_opmode;
 140         bool enable_ht = true, ht_changed;
 141         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 142
 143         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 144
 145         /* HT is not supported */
 146         if (!sband->ht_cap.ht_supported)
 147                 enable_ht = false;
 148
 149         /* check that channel matches the right operating channel */
 150         if (local->hw.conf.channel->center_freq !=
 151             ieee80211_channel_to_frequency(hti->control_chan))
 152                 enable_ht = false;
 153
 154         if (enable_ht) {
 155                 channel_type = NL80211_CHAN_HT20;
 156
 157                 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
 158                     (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
 159                     (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
 160                         switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 161                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 162                                 if (!(local->hw.conf.channel->flags &
 163                                     IEEE80211_CHAN_NO_HT40PLUS))
 164                                         channel_type = NL80211_CHAN_HT40PLUS;
 165                                 break;
 166                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 167                                 if (!(local->hw.conf.channel->flags &
 168                                     IEEE80211_CHAN_NO_HT40MINUS))
 169                                         channel_type = NL80211_CHAN_HT40MINUS;
 170                                 break;
 171                         }
 172                 }
 173         }
 174
 175         ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
 176                      channel_type != local->hw.conf.channel_type;
 177
 178         if (local->tmp_channel)
 179                 local->tmp_channel_type = channel_type;
 180         local->oper_channel_type = channel_type;
 181
 182         if (ht_changed) {
 183                 /* channel_type change automatically detected */
 184                 ieee80211_hw_config(local, 0);
 185
 186                 rcu_read_lock();
 187                 sta = sta_info_get(sdata, bssid);
 188                 if (sta)
 189                         rate_control_rate_update(local, sband, sta,
 190                                                  IEEE80211_RC_HT_CHANGED,
 191                                                  local->oper_channel_type);
 192                 rcu_read_unlock();
 193         }
 194
 195         /* disable HT */
 196         if (!enable_ht)
 197                 return 0;
 198
 199         ht_opmode = le16_to_cpu(hti->operation_mode);
 200
 201         /* if bss configuration changed store the new one */
 202         if (!sdata->ht_opmode_valid ||
 203             sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 204                 changed |= BSS_CHANGED_HT;
 205                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 206                 sdata->ht_opmode_valid = true;
 207         }
 208
 209         return changed;
 210 }
 211
 212 /* frame sending functions */
 213
 214 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
 215                                            const u8 *bssid, u16 stype, u16 reason,
 216                                            void *cookie, bool send_frame)
 217 {
 218         struct ieee80211_local *local = sdata->local;
 219         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 220         struct sk_buff *skb;
 221         struct ieee80211_mgmt *mgmt;
 222
 223         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 224         if (!skb) {
 225                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
 226                        "deauth/disassoc frame\n", sdata->name);
 227                 return;
 228         }
 229         skb_reserve(skb, local->hw.extra_tx_headroom);
 230
 231         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 232         memset(mgmt, 0, 24);
 233         memcpy(mgmt->da, bssid, ETH_ALEN);
 234         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 235         memcpy(mgmt->bssid, bssid, ETH_ALEN);
 236         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
 237         skb_put(skb, 2);
 238         /* u.deauth.reason_code == u.disassoc.reason_code */
 239         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 240
 241         if (stype == IEEE80211_STYPE_DEAUTH)
 242                 if (cookie)
 243                         __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
 244                 else
 245                         cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
 246         else
 247                 if (cookie)
 248                         __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
 249                 else
 250                         cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
 251         if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
 252                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 253
 254         if (send_frame)
 255                 ieee80211_tx_skb(sdata, skb);
 256         else
 257                 kfree_skb(skb);
 258 }
 259
 260 void ieee80211_send_pspoll(struct ieee80211_local *local,
 261                            struct ieee80211_sub_if_data *sdata)
 262 {
 263         struct ieee80211_pspoll *pspoll;
 264         struct sk_buff *skb;
 265
 266         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 267         if (!skb)
 268                 return;
 269
 270         pspoll = (struct ieee80211_pspoll *) skb->data;
 271         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 272
 273         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 274         ieee80211_tx_skb(sdata, skb);
 275 }
 276
 277 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 278                              struct ieee80211_sub_if_data *sdata,
 279                              int powersave)
 280 {
 281         struct sk_buff *skb;
 282         struct ieee80211_hdr_3addr *nullfunc;
 283
 284         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 285         if (!skb)
 286                 return;
 287
 288         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 289         if (powersave)
 290                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 291
 292         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 293         ieee80211_tx_skb(sdata, skb);
 294 }
 295
 296 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 297                                           struct ieee80211_sub_if_data *sdata)
 298 {
 299         struct sk_buff *skb;
 300         struct ieee80211_hdr *nullfunc;
 301         __le16 fc;
 302
 303         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 304                 return;
 305
 306         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 307         if (!skb) {
 308                 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
 309                        "nullfunc frame\n", sdata->name);
 310                 return;
 311         }
 312         skb_reserve(skb, local->hw.extra_tx_headroom);
 313
 314         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 315         memset(nullfunc, 0, 30);
 316         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 317                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 318         nullfunc->frame_control = fc;
 319         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 320         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 321         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 322         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 323
 324         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 325         ieee80211_tx_skb(sdata, skb);
 326 }
 327
 328 /* spectrum management related things */
 329 static void ieee80211_chswitch_work(struct work_struct *work)
 330 {
 331         struct ieee80211_sub_if_data *sdata =
 332                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 333         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 334
 335         if (!ieee80211_sdata_running(sdata))
 336                 return;
 337
 338         mutex_lock(&ifmgd->mtx);
 339         if (!ifmgd->associated)
 340                 goto out;
 341
 342         sdata->local->oper_channel = sdata->local->csa_channel;
 343         ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
 344
 345         /* XXX: shouldn't really modify cfg80211-owned data! */
 346         ifmgd->associated->channel = sdata->local->oper_channel;
 347
 348         ieee80211_wake_queues_by_reason(&sdata->local->hw,
 349                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 350  out:
 351         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 352         mutex_unlock(&ifmgd->mtx);
 353 }
 354
 355 static void ieee80211_chswitch_timer(unsigned long data)
 356 {
 357         struct ieee80211_sub_if_data *sdata =
 358                 (struct ieee80211_sub_if_data *) data;
 359         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 360
 361         if (sdata->local->quiescing) {
 362                 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
 363                 return;
 364         }
 365
 366         ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 367 }
 368
 369 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 370                                       struct ieee80211_channel_sw_ie *sw_elem,
 371                                       struct ieee80211_bss *bss)
 372 {
 373         struct cfg80211_bss *cbss =
 374                 container_of((void *)bss, struct cfg80211_bss, priv);
 375         struct ieee80211_channel *new_ch;
 376         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 377         int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
 378
 379         ASSERT_MGD_MTX(ifmgd);
 380
 381         if (!ifmgd->associated)
 382                 return;
 383
 384         if (sdata->local->scanning)
 385                 return;
 386
 387         /* Disregard subsequent beacons if we are already running a timer
 388            processing a CSA */
 389
 390         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
 391                 return;
 392
 393         new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
 394         if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
 395                 return;
 396
 397         sdata->local->csa_channel = new_ch;
 398
 399         if (sw_elem->count <= 1) {
 400                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 401         } else {
 402                 ieee80211_stop_queues_by_reason(&sdata->local->hw,
 403                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 404                 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
 405                 mod_timer(&ifmgd->chswitch_timer,
 406                           jiffies +
 407                           msecs_to_jiffies(sw_elem->count *
 408                                            cbss->beacon_interval));
 409         }
 410 }
 411
 412 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
 413                                         u16 capab_info, u8 *pwr_constr_elem,
 414                                         u8 pwr_constr_elem_len)
 415 {
 416         struct ieee80211_conf *conf = &sdata->local->hw.conf;
 417
 418         if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
 419                 return;
 420
 421         /* Power constraint IE length should be 1 octet */
 422         if (pwr_constr_elem_len != 1)
 423                 return;
 424
 425         if ((*pwr_constr_elem <= conf->channel->max_power) &&
 426             (*pwr_constr_elem != sdata->local->power_constr_level)) {
 427                 sdata->local->power_constr_level = *pwr_constr_elem;
 428                 ieee80211_hw_config(sdata->local, 0);
 429         }
 430 }
 431
 432 /* powersave */
 433 static void ieee80211_enable_ps(struct ieee80211_local *local,
 434                                 struct ieee80211_sub_if_data *sdata)
 435 {
 436         struct ieee80211_conf *conf = &local->hw.conf;
 437
 438         /*
 439          * If we are scanning right now then the parameters will
 440          * take effect when scan finishes.
 441          */
 442         if (local->scanning)
 443                 return;
 444
 445         if (conf->dynamic_ps_timeout > 0 &&
 446             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
 447                 mod_timer(&local->dynamic_ps_timer, jiffies +
 448                           msecs_to_jiffies(conf->dynamic_ps_timeout));
 449         } else {
 450                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 451                         ieee80211_send_nullfunc(local, sdata, 1);
 452
 453                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
 454                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
 455                         return;
 456
 457                 conf->flags |= IEEE80211_CONF_PS;
 458                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 459         }
 460 }
 461
 462 static void ieee80211_change_ps(struct ieee80211_local *local)
 463 {
 464         struct ieee80211_conf *conf = &local->hw.conf;
 465
 466         if (local->ps_sdata) {
 467                 ieee80211_enable_ps(local, local->ps_sdata);
 468         } else if (conf->flags & IEEE80211_CONF_PS) {
 469                 conf->flags &= ~IEEE80211_CONF_PS;
 470                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 471                 del_timer_sync(&local->dynamic_ps_timer);
 472                 cancel_work_sync(&local->dynamic_ps_enable_work);
 473         }
 474 }
 475
 476 /* need to hold RTNL or interface lock */
 477 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
 478 {
 479         struct ieee80211_sub_if_data *sdata, *found = NULL;
 480         int count = 0;
 481         int timeout;
 482
 483         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
 484                 local->ps_sdata = NULL;
 485                 return;
 486         }
 487
 488         if (!list_empty(&local->work_list)) {
 489                 local->ps_sdata = NULL;
 490                 goto change;
 491         }
 492
 493         list_for_each_entry(sdata, &local->interfaces, list) {
 494                 if (!ieee80211_sdata_running(sdata))
 495                         continue;
 496                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
 497                         continue;
 498                 found = sdata;
 499                 count++;
 500         }
 501
 502         if (count == 1 && found->u.mgd.powersave &&
 503             found->u.mgd.associated &&
 504             found->u.mgd.associated->beacon_ies &&
 505             !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
 506                                     IEEE80211_STA_CONNECTION_POLL))) {
 507                 s32 beaconint_us;
 508
 509                 if (latency < 0)
 510                         latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
 511
 512                 beaconint_us = ieee80211_tu_to_usec(
 513                                         found->vif.bss_conf.beacon_int);
 514
 515                 timeout = local->hw.conf.dynamic_ps_forced_timeout;
 516                 if (timeout < 0) {
 517                         /*
 518                          * The 2 second value is there for compatibility until
 519                          * the PM_QOS_NETWORK_LATENCY is configured with real
 520                          * values.
 521                          */
 522                         if (latency == 2000000000)
 523                                 timeout = 100;
 524                         else if (latency <= 50000)
 525                                 timeout = 300;
 526                         else if (latency <= 100000)
 527                                 timeout = 100;
 528                         else if (latency <= 500000)
 529                                 timeout = 50;
 530                         else
 531                                 timeout = 0;
 532                 }
 533                 local->hw.conf.dynamic_ps_timeout = timeout;
 534
 535                 if (beaconint_us > latency) {
 536                         local->ps_sdata = NULL;
 537                 } else {
 538                         struct ieee80211_bss *bss;
 539                         int maxslp = 1;
 540                         u8 dtimper;
 541
 542                         bss = (void *)found->u.mgd.associated->priv;
 543                         dtimper = bss->dtim_period;
 544
 545                         /* If the TIM IE is invalid, pretend the value is 1 */
 546                         if (!dtimper)
 547                                 dtimper = 1;
 548                         else if (dtimper > 1)
 549                                 maxslp = min_t(int, dtimper,
 550                                                     latency / beaconint_us);
 551
 552                         local->hw.conf.max_sleep_period = maxslp;
 553                         local->hw.conf.ps_dtim_period = dtimper;
 554                         local->ps_sdata = found;
 555                 }
 556         } else {
 557                 local->ps_sdata = NULL;
 558         }
 559
 560  change:
 561         ieee80211_change_ps(local);
 562 }
 563
 564 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
 565 {
 566         struct ieee80211_local *local =
 567                 container_of(work, struct ieee80211_local,
 568                              dynamic_ps_disable_work);
 569
 570         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
 571                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
 572                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 573         }
 574
 575         ieee80211_wake_queues_by_reason(&local->hw,
 576                                         IEEE80211_QUEUE_STOP_REASON_PS);
 577 }
 578
 579 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
 580 {
 581         struct ieee80211_local *local =
 582                 container_of(work, struct ieee80211_local,
 583                              dynamic_ps_enable_work);
 584         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
 585         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 586
 587         /* can only happen when PS was just disabled anyway */
 588         if (!sdata)
 589                 return;
 590
 591         if (local->hw.conf.flags & IEEE80211_CONF_PS)
 592                 return;
 593
 594         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
 595             (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
 596                 ieee80211_send_nullfunc(local, sdata, 1);
 597
 598         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
 599               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
 600             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
 601                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
 602                 local->hw.conf.flags |= IEEE80211_CONF_PS;
 603                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 604         }
 605 }
 606
 607 void ieee80211_dynamic_ps_timer(unsigned long data)
 608 {
 609         struct ieee80211_local *local = (void *) data;
 610
 611         if (local->quiescing || local->suspended)
 612                 return;
 613
 614         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
 615 }
 616
 617 /* MLME */
 618 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
 619                                      struct ieee80211_if_managed *ifmgd,
 620                                      u8 *wmm_param, size_t wmm_param_len)
 621 {
 622         struct ieee80211_tx_queue_params params;
 623         size_t left;
 624         int count;
 625         u8 *pos, uapsd_queues = 0;
 626
 627         if (!local->ops->conf_tx)
 628                 return;
 629
 630         if (local->hw.queues < 4)
 631                 return;
 632
 633         if (!wmm_param)
 634                 return;
 635
 636         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 637                 return;
 638
 639         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
 640                 uapsd_queues = local->uapsd_queues;
 641
 642         count = wmm_param[6] & 0x0f;
 643         if (count == ifmgd->wmm_last_param_set)
 644                 return;
 645         ifmgd->wmm_last_param_set = count;
 646
 647         pos = wmm_param + 8;
 648         left = wmm_param_len - 8;
 649
 650         memset(&params, 0, sizeof(params));
 651
 652         local->wmm_acm = 0;
 653         for (; left >= 4; left -= 4, pos += 4) {
 654                 int aci = (pos[0] >> 5) & 0x03;
 655                 int acm = (pos[0] >> 4) & 0x01;
 656                 bool uapsd = false;
 657                 int queue;
 658
 659                 switch (aci) {
 660                 case 1: /* AC_BK */
 661                         queue = 3;
 662                         if (acm)
 663                                 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
 664                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 665                                 uapsd = true;
 666                         break;
 667                 case 2: /* AC_VI */
 668                         queue = 1;
 669                         if (acm)
 670                                 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
 671                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 672                                 uapsd = true;
 673                         break;
 674                 case 3: /* AC_VO */
 675                         queue = 0;
 676                         if (acm)
 677                                 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
 678                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 679                                 uapsd = true;
 680                         break;
 681                 case 0: /* AC_BE */
 682                 default:
 683                         queue = 2;
 684                         if (acm)
 685                                 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
 686                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 687                                 uapsd = true;
 688                         break;
 689                 }
 690
 691                 params.aifs = pos[0] & 0x0f;
 692                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 693                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 694                 params.txop = get_unaligned_le16(pos + 2);
 695                 params.uapsd = uapsd;
 696
 697 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 698                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 699                        "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
 700                        wiphy_name(local->hw.wiphy), queue, aci, acm,
 701                        params.aifs, params.cw_min, params.cw_max, params.txop,
 702                        params.uapsd);
 703 #endif
 704                 if (drv_conf_tx(local, queue, &params))
 705                         printk(KERN_DEBUG "%s: failed to set TX queue "
 706                                "parameters for queue %d\n",
 707                                wiphy_name(local->hw.wiphy), queue);
 708         }
 709
 710         /* enable WMM or activate new settings */
 711         local->hw.conf.flags |= IEEE80211_CONF_QOS;
 712         drv_config(local, IEEE80211_CONF_CHANGE_QOS);
 713 }
 714
 715 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 716                                            u16 capab, bool erp_valid, u8 erp)
 717 {
 718         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 719         u32 changed = 0;
 720         bool use_protection;
 721         bool use_short_preamble;
 722         bool use_short_slot;
 723
 724         if (erp_valid) {
 725                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
 726                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
 727         } else {
 728                 use_protection = false;
 729                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
 730         }
 731
 732         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
 733         if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
 734                 use_short_slot = true;
 735
 736         if (use_protection != bss_conf->use_cts_prot) {
 737                 bss_conf->use_cts_prot = use_protection;
 738                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 739         }
 740
 741         if (use_short_preamble != bss_conf->use_short_preamble) {
 742                 bss_conf->use_short_preamble = use_short_preamble;
 743                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 744         }
 745
 746         if (use_short_slot != bss_conf->use_short_slot) {
 747                 bss_conf->use_short_slot = use_short_slot;
 748                 changed |= BSS_CHANGED_ERP_SLOT;
 749         }
 750
 751         return changed;
 752 }
 753
 754 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 755                                      struct cfg80211_bss *cbss,
 756                                      u32 bss_info_changed)
 757 {
 758         struct ieee80211_bss *bss = (void *)cbss->priv;
 759         struct ieee80211_local *local = sdata->local;
 760
 761         bss_info_changed |= BSS_CHANGED_ASSOC;
 762         /* set timing information */
 763         sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
 764         sdata->vif.bss_conf.timestamp = cbss->tsf;
 765
 766         bss_info_changed |= BSS_CHANGED_BEACON_INT;
 767         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
 768                 cbss->capability, bss->has_erp_value, bss->erp_value);
 769
 770         sdata->u.mgd.associated = cbss;
 771         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
 772
 773         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
 774
 775         /* just to be sure */
 776         sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
 777                                 IEEE80211_STA_BEACON_POLL);
 778
 779         /*
 780          * Always handle WMM once after association regardless
 781          * of the first value the AP uses. Setting -1 here has
 782          * that effect because the AP values is an unsigned
 783          * 4-bit value.
 784          */
 785         sdata->u.mgd.wmm_last_param_set = -1;
 786
 787         ieee80211_led_assoc(local, 1);
 788
 789         sdata->vif.bss_conf.assoc = 1;
 790         /*
 791          * For now just always ask the driver to update the basic rateset
 792          * when we have associated, we aren't checking whether it actually
 793          * changed or not.
 794          */
 795         bss_info_changed |= BSS_CHANGED_BASIC_RATES;
 796
 797         /* And the BSSID changed - we're associated now */
 798         bss_info_changed |= BSS_CHANGED_BSSID;
 799
 800         /* Tell the driver to monitor connection quality (if supported) */
 801         if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
 802             sdata->vif.bss_conf.cqm_rssi_thold)
 803                 bss_info_changed |= BSS_CHANGED_CQM;
 804
 805         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
 806
 807         mutex_lock(&local->iflist_mtx);
 808         ieee80211_recalc_ps(local, -1);
 809         ieee80211_recalc_smps(local, sdata);
 810         mutex_unlock(&local->iflist_mtx);
 811
 812         netif_tx_start_all_queues(sdata->dev);
 813         netif_carrier_on(sdata->dev);
 814 }
 815
 816 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 817                                    bool remove_sta)
 818 {
 819         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 820         struct ieee80211_local *local = sdata->local;
 821         struct sta_info *sta;
 822         u32 changed = 0, config_changed = 0;
 823         u8 bssid[ETH_ALEN];
 824
 825         ASSERT_MGD_MTX(ifmgd);
 826
 827         if (WARN_ON(!ifmgd->associated))
 828                 return;
 829
 830         memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
 831
 832         ifmgd->associated = NULL;
 833         memset(ifmgd->bssid, 0, ETH_ALEN);
 834
 835         /*
 836          * we need to commit the associated = NULL change because the
 837          * scan code uses that to determine whether this iface should
 838          * go to/wake up from powersave or not -- and could otherwise
 839          * wake the queues erroneously.
 840          */
 841         smp_mb();
 842
 843         /*
 844          * Thus, we can only afterwards stop the queues -- to account
 845          * for the case where another CPU is finishing a scan at this
 846          * time -- we don't want the scan code to enable queues.
 847          */
 848
 849         netif_tx_stop_all_queues(sdata->dev);
 850         netif_carrier_off(sdata->dev);
 851
 852         rcu_read_lock();
 853         sta = sta_info_get(sdata, bssid);
 854         if (sta) {
 855                 set_sta_flags(sta, WLAN_STA_DISASSOC);
 856                 ieee80211_sta_tear_down_BA_sessions(sta);
 857         }
 858         rcu_read_unlock();
 859
 860         changed |= ieee80211_reset_erp_info(sdata);
 861
 862         ieee80211_led_assoc(local, 0);
 863         changed |= BSS_CHANGED_ASSOC;
 864         sdata->vif.bss_conf.assoc = false;
 865
 866         ieee80211_set_wmm_default(sdata);
 867
 868         /* channel(_type) changes are handled by ieee80211_hw_config */
 869         local->oper_channel_type = NL80211_CHAN_NO_HT;
 870
 871         /* on the next assoc, re-program HT parameters */
 872         sdata->ht_opmode_valid = false;
 873
 874         local->power_constr_level = 0;
 875
 876         del_timer_sync(&local->dynamic_ps_timer);
 877         cancel_work_sync(&local->dynamic_ps_enable_work);
 878
 879         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
 880                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
 881                 config_changed |= IEEE80211_CONF_CHANGE_PS;
 882         }
 883
 884         ieee80211_hw_config(local, config_changed);
 885
 886         /* And the BSSID changed -- not very interesting here */
 887         changed |= BSS_CHANGED_BSSID;
 888         ieee80211_bss_info_change_notify(sdata, changed);
 889
 890         if (remove_sta)
 891                 sta_info_destroy_addr(sdata, bssid);
 892 }
 893
 894 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
 895                              struct ieee80211_hdr *hdr)
 896 {
 897         /*
 898          * We can postpone the mgd.timer whenever receiving unicast frames
 899          * from AP because we know that the connection is working both ways
 900          * at that time. But multicast frames (and hence also beacons) must
 901          * be ignored here, because we need to trigger the timer during
 902          * data idle periods for sending the periodic probe request to the
 903          * AP we're connected to.
 904          */
 905         if (is_multicast_ether_addr(hdr->addr1))
 906                 return;
 907
 908         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 909                 return;
 910
 911         mod_timer(&sdata->u.mgd.conn_mon_timer,
 912                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 913 }
 914
 915 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
 916 {
 917         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 918         const u8 *ssid;
 919
 920         ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
 921         ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
 922                                  ssid + 2, ssid[1], NULL, 0);
 923
 924         ifmgd->probe_send_count++;
 925         ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
 926         run_again(ifmgd, ifmgd->probe_timeout);
 927 }
 928
 929 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
 930                                    bool beacon)
 931 {
 932         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 933         bool already = false;
 934
 935         if (!ieee80211_sdata_running(sdata))
 936                 return;
 937
 938         if (sdata->local->scanning)
 939                 return;
 940
 941         if (sdata->local->tmp_channel)
 942                 return;
 943
 944         mutex_lock(&ifmgd->mtx);
 945
 946         if (!ifmgd->associated)
 947                 goto out;
 948
 949 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 950         if (beacon && net_ratelimit())
 951                 printk(KERN_DEBUG "%s: detected beacon loss from AP "
 952                        "- sending probe request\n", sdata->name);
 953 #endif
 954
 955         /*
 956          * The driver/our work has already reported this event or the
 957          * connection monitoring has kicked in and we have already sent
 958          * a probe request. Or maybe the AP died and the driver keeps
 959          * reporting until we disassociate...
 960          *
 961          * In either case we have to ignore the current call to this
 962          * function (except for setting the correct probe reason bit)
 963          * because otherwise we would reset the timer every time and
 964          * never check whether we received a probe response!
 965          */
 966         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
 967                             IEEE80211_STA_CONNECTION_POLL))
 968                 already = true;
 969
 970         if (beacon)
 971                 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
 972         else
 973                 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
 974
 975         if (already)
 976                 goto out;
 977
 978         mutex_lock(&sdata->local->iflist_mtx);
 979         ieee80211_recalc_ps(sdata->local, -1);
 980         mutex_unlock(&sdata->local->iflist_mtx);
 981
 982         ifmgd->probe_send_count = 0;
 983         ieee80211_mgd_probe_ap_send(sdata);
 984  out:
 985         mutex_unlock(&ifmgd->mtx);
 986 }
 987
 988 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
 989 {
 990         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 991         struct ieee80211_local *local = sdata->local;
 992         u8 bssid[ETH_ALEN];
 993
 994         mutex_lock(&ifmgd->mtx);
 995         if (!ifmgd->associated) {
 996                 mutex_unlock(&ifmgd->mtx);
 997                 return;
 998         }
 999
1000         memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1001
1002         printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1003
1004         ieee80211_set_disassoc(sdata, true);
1005         ieee80211_recalc_idle(local);
1006         mutex_unlock(&ifmgd->mtx);
1007         /*
1008          * must be outside lock due to cfg80211,
1009          * but that's not a problem.
1010          */
1011         ieee80211_send_deauth_disassoc(sdata, bssid,
1012                                        IEEE80211_STYPE_DEAUTH,
1013                                        WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1014                                        NULL, true);
1015 }
1016
1017 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1018 {
1019         struct ieee80211_sub_if_data *sdata =
1020                 container_of(work, struct ieee80211_sub_if_data,
1021                              u.mgd.beacon_connection_loss_work);
1022
1023         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1024                 __ieee80211_connection_loss(sdata);
1025         else
1026                 ieee80211_mgd_probe_ap(sdata, true);
1027 }
1028
1029 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1030 {
1031         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1032         struct ieee80211_hw *hw = &sdata->local->hw;
1033
1034         trace_api_beacon_loss(sdata);
1035
1036         WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1037         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1038 }
1039 EXPORT_SYMBOL(ieee80211_beacon_loss);
1040
1041 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1042 {
1043         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1044         struct ieee80211_hw *hw = &sdata->local->hw;
1045
1046         trace_api_connection_loss(sdata);
1047
1048         WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1049         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1050 }
1051 EXPORT_SYMBOL(ieee80211_connection_loss);
1052
1053
1054 static enum rx_mgmt_action __must_check
1055 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1056                          struct ieee80211_mgmt *mgmt, size_t len)
1057 {
1058         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1059         const u8 *bssid = NULL;
1060         u16 reason_code;
1061
1062         if (len < 24 + 2)
1063                 return RX_MGMT_NONE;
1064
1065         ASSERT_MGD_MTX(ifmgd);
1066
1067         bssid = ifmgd->associated->bssid;
1068
1069         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1070
1071         printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1072                         sdata->name, bssid, reason_code);
1073
1074         ieee80211_set_disassoc(sdata, true);
1075         ieee80211_recalc_idle(sdata->local);
1076
1077         return RX_MGMT_CFG80211_DEAUTH;
1078 }
1079
1080
1081 static enum rx_mgmt_action __must_check
1082 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1083                            struct ieee80211_mgmt *mgmt, size_t len)
1084 {
1085         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1086         u16 reason_code;
1087
1088         if (len < 24 + 2)
1089                 return RX_MGMT_NONE;
1090
1091         ASSERT_MGD_MTX(ifmgd);
1092
1093         if (WARN_ON(!ifmgd->associated))
1094                 return RX_MGMT_NONE;
1095
1096         if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1097                 return RX_MGMT_NONE;
1098
1099         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1100
1101         printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1102                         sdata->name, mgmt->sa, reason_code);
1103
1104         ieee80211_set_disassoc(sdata, true);
1105         ieee80211_recalc_idle(sdata->local);
1106         return RX_MGMT_CFG80211_DISASSOC;
1107 }
1108
1109
1110 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1111                                     struct ieee80211_mgmt *mgmt, size_t len)
1112 {
1113         struct ieee80211_sub_if_data *sdata = wk->sdata;
1114         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1115         struct ieee80211_local *local = sdata->local;
1116         struct ieee80211_supported_band *sband;
1117         struct sta_info *sta;
1118         struct cfg80211_bss *cbss = wk->assoc.bss;
1119         u8 *pos;
1120         u32 rates, basic_rates;
1121         u16 capab_info, aid;
1122         struct ieee802_11_elems elems;
1123         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1124         u32 changed = 0;
1125         int i, j, err;
1126         bool have_higher_than_11mbit = false;
1127         u16 ap_ht_cap_flags;
1128
1129         /* AssocResp and ReassocResp have identical structure */
1130
1131         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1132         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1133
1134         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1135                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1136                        "set\n", sdata->name, aid);
1137         aid &= ~(BIT(15) | BIT(14));
1138
1139         pos = mgmt->u.assoc_resp.variable;
1140         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1141
1142         if (!elems.supp_rates) {
1143                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1144                        sdata->name);
1145                 return false;
1146         }
1147
1148         ifmgd->aid = aid;
1149
1150         sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1151         if (!sta) {
1152                 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1153                        " the AP\n", sdata->name);
1154                 return false;
1155         }
1156
1157         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1158                            WLAN_STA_ASSOC_AP);
1159         if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1160                 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1161
1162         rates = 0;
1163         basic_rates = 0;
1164         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1165
1166         for (i = 0; i < elems.supp_rates_len; i++) {
1167                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1168                 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1169
1170                 if (rate > 110)
1171                         have_higher_than_11mbit = true;
1172
1173                 for (j = 0; j < sband->n_bitrates; j++) {
1174                         if (sband->bitrates[j].bitrate == rate) {
1175                                 rates |= BIT(j);
1176                                 if (is_basic)
1177                                         basic_rates |= BIT(j);
1178                                 break;
1179                         }
1180                 }
1181         }
1182
1183         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1184                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1185                 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1186
1187                 if (rate > 110)
1188                         have_higher_than_11mbit = true;
1189
1190                 for (j = 0; j < sband->n_bitrates; j++) {
1191                         if (sband->bitrates[j].bitrate == rate) {
1192                                 rates |= BIT(j);
1193                                 if (is_basic)
1194                                         basic_rates |= BIT(j);
1195                                 break;
1196                         }
1197                 }
1198         }
1199
1200         sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1201         sdata->vif.bss_conf.basic_rates = basic_rates;
1202
1203         /* cf. IEEE 802.11 9.2.12 */
1204         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1205             have_higher_than_11mbit)
1206                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1207         else
1208                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1209
1210         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1211                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1212                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1213
1214         ap_ht_cap_flags = sta->sta.ht_cap.cap;
1215
1216         rate_control_rate_init(sta);
1217
1218         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1219                 set_sta_flags(sta, WLAN_STA_MFP);
1220
1221         if (elems.wmm_param)
1222                 set_sta_flags(sta, WLAN_STA_WME);
1223
1224         err = sta_info_insert(sta);
1225         sta = NULL;
1226         if (err) {
1227                 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1228                        " the AP (error %d)\n", sdata->name, err);
1229                 return false;
1230         }
1231
1232         if (elems.wmm_param)
1233                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1234                                          elems.wmm_param_len);
1235         else
1236                 ieee80211_set_wmm_default(sdata);
1237
1238         local->oper_channel = wk->chan;
1239
1240         if (elems.ht_info_elem && elems.wmm_param &&
1241             (sdata->local->hw.queues >= 4) &&
1242             !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1243                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1244                                                cbss->bssid, ap_ht_cap_flags);
1245
1246         /* set AID and assoc capability,
1247          * ieee80211_set_associated() will tell the driver */
1248         bss_conf->aid = aid;
1249         bss_conf->assoc_capability = capab_info;
1250         ieee80211_set_associated(sdata, cbss, changed);
1251
1252         /*
1253          * If we're using 4-addr mode, let the AP know that we're
1254          * doing so, so that it can create the STA VLAN on its side
1255          */
1256         if (ifmgd->use_4addr)
1257                 ieee80211_send_4addr_nullfunc(local, sdata);
1258
1259         /*
1260          * Start timer to probe the connection to the AP now.
1261          * Also start the timer that will detect beacon loss.
1262          */
1263         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1264         mod_beacon_timer(sdata);
1265
1266         return true;
1267 }
1268
1269
1270 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1271                                   struct ieee80211_mgmt *mgmt,
1272                                   size_t len,
1273                                   struct ieee80211_rx_status *rx_status,
1274                                   struct ieee802_11_elems *elems,
1275                                   bool beacon)
1276 {
1277         struct ieee80211_local *local = sdata->local;
1278         int freq;
1279         struct ieee80211_bss *bss;
1280         struct ieee80211_channel *channel;
1281         bool need_ps = false;
1282
1283         if (sdata->u.mgd.associated) {
1284                 bss = (void *)sdata->u.mgd.associated->priv;
1285                 /* not previously set so we may need to recalc */
1286                 need_ps = !bss->dtim_period;
1287         }
1288
1289         if (elems->ds_params && elems->ds_params_len == 1)
1290                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1291         else
1292                 freq = rx_status->freq;
1293
1294         channel = ieee80211_get_channel(local->hw.wiphy, freq);
1295
1296         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1297                 return;
1298
1299         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1300                                         channel, beacon);
1301         if (bss)
1302                 ieee80211_rx_bss_put(local, bss);
1303
1304         if (!sdata->u.mgd.associated)
1305                 return;
1306
1307         if (need_ps) {
1308                 mutex_lock(&local->iflist_mtx);
1309                 ieee80211_recalc_ps(local, -1);
1310                 mutex_unlock(&local->iflist_mtx);
1311         }
1312
1313         if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1314             (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1315                                                         ETH_ALEN) == 0)) {
1316                 struct ieee80211_channel_sw_ie *sw_elem =
1317                         (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1318                 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1319         }
1320 }
1321
1322
1323 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1324                                          struct sk_buff *skb)
1325 {
1326         struct ieee80211_mgmt *mgmt = (void *)skb->data;
1327         struct ieee80211_if_managed *ifmgd;
1328         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1329         size_t baselen, len = skb->len;
1330         struct ieee802_11_elems elems;
1331
1332         ifmgd = &sdata->u.mgd;
1333
1334         ASSERT_MGD_MTX(ifmgd);
1335
1336         if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1337                 return; /* ignore ProbeResp to foreign address */
1338
1339         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1340         if (baselen > len)
1341                 return;
1342
1343         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1344                                 &elems);
1345
1346         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1347
1348         if (ifmgd->associated &&
1349             memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1350             ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1351                             IEEE80211_STA_CONNECTION_POLL)) {
1352                 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1353                                   IEEE80211_STA_BEACON_POLL);
1354                 mutex_lock(&sdata->local->iflist_mtx);
1355                 ieee80211_recalc_ps(sdata->local, -1);
1356                 mutex_unlock(&sdata->local->iflist_mtx);
1357
1358                 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1359                         return;
1360
1361                 /*
1362                  * We've received a probe response, but are not sure whether
1363                  * we have or will be receiving any beacons or data, so let's
1364                  * schedule the timers again, just in case.
1365                  */
1366                 mod_beacon_timer(sdata);
1367
1368                 mod_timer(&ifmgd->conn_mon_timer,
1369                           round_jiffies_up(jiffies +
1370                                            IEEE80211_CONNECTION_IDLE_TIME));
1371         }
1372 }
1373
1374 /*
1375  * This is the canonical list of information elements we care about,
1376  * the filter code also gives us all changes to the Microsoft OUI
1377  * (00:50:F2) vendor IE which is used for WMM which we need to track.
1378  *
1379  * We implement beacon filtering in software since that means we can
1380  * avoid processing the frame here and in cfg80211, and userspace
1381  * will not be able to tell whether the hardware supports it or not.
1382  *
1383  * XXX: This list needs to be dynamic -- userspace needs to be able to
1384  *      add items it requires. It also needs to be able to tell us to
1385  *      look out for other vendor IEs.
1386  */
1387 static const u64 care_about_ies =
1388         (1ULL << WLAN_EID_COUNTRY) |
1389         (1ULL << WLAN_EID_ERP_INFO) |
1390         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1391         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1392         (1ULL << WLAN_EID_HT_CAPABILITY) |
1393         (1ULL << WLAN_EID_HT_INFORMATION);
1394
1395 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1396                                      struct ieee80211_mgmt *mgmt,
1397                                      size_t len,
1398                                      struct ieee80211_rx_status *rx_status)
1399 {
1400         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1401         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1402         size_t baselen;
1403         struct ieee802_11_elems elems;
1404         struct ieee80211_local *local = sdata->local;
1405         u32 changed = 0;
1406         bool erp_valid, directed_tim = false;
1407         u8 erp_value = 0;
1408         u32 ncrc;
1409         u8 *bssid;
1410
1411         ASSERT_MGD_MTX(ifmgd);
1412
1413         /* Process beacon from the current BSS */
1414         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1415         if (baselen > len)
1416                 return;
1417
1418         if (rx_status->freq != local->hw.conf.channel->center_freq)
1419                 return;
1420
1421         /*
1422          * We might have received a number of frames, among them a
1423          * disassoc frame and a beacon...
1424          */
1425         if (!ifmgd->associated)
1426                 return;
1427
1428         bssid = ifmgd->associated->bssid;
1429
1430         /*
1431          * And in theory even frames from a different AP we were just
1432          * associated to a split-second ago!
1433          */
1434         if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1435                 return;
1436
1437         /* Track average RSSI from the Beacon frames of the current AP */
1438         ifmgd->last_beacon_signal = rx_status->signal;
1439         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1440                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1441                 ifmgd->ave_beacon_signal = rx_status->signal;
1442                 ifmgd->last_cqm_event_signal = 0;
1443         } else {
1444                 ifmgd->ave_beacon_signal =
1445                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1446                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1447                          ifmgd->ave_beacon_signal) / 16;
1448         }
1449         if (bss_conf->cqm_rssi_thold &&
1450             !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1451                 int sig = ifmgd->ave_beacon_signal / 16;
1452                 int last_event = ifmgd->last_cqm_event_signal;
1453                 int thold = bss_conf->cqm_rssi_thold;
1454                 int hyst = bss_conf->cqm_rssi_hyst;
1455                 if (sig < thold &&
1456                     (last_event == 0 || sig < last_event - hyst)) {
1457                         ifmgd->last_cqm_event_signal = sig;
1458                         ieee80211_cqm_rssi_notify(
1459                                 &sdata->vif,
1460                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1461                                 GFP_KERNEL);
1462                 } else if (sig > thold &&
1463                            (last_event == 0 || sig > last_event + hyst)) {
1464                         ifmgd->last_cqm_event_signal = sig;
1465                         ieee80211_cqm_rssi_notify(
1466                                 &sdata->vif,
1467                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1468                                 GFP_KERNEL);
1469                 }
1470         }
1471
1472         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1473 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1474                 if (net_ratelimit()) {
1475                         printk(KERN_DEBUG "%s: cancelling probereq poll due "
1476                                "to a received beacon\n", sdata->name);
1477                 }
1478 #endif
1479                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1480                 mutex_lock(&local->iflist_mtx);
1481                 ieee80211_recalc_ps(local, -1);
1482                 mutex_unlock(&local->iflist_mtx);
1483         }
1484
1485         /*
1486          * Push the beacon loss detection into the future since
1487          * we are processing a beacon from the AP just now.
1488          */
1489         mod_beacon_timer(sdata);
1490
1491         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1492         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1493                                           len - baselen, &elems,
1494                                           care_about_ies, ncrc);
1495
1496         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1497                 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1498                                                    ifmgd->aid);
1499
1500         if (ncrc != ifmgd->beacon_crc) {
1501                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1502                                       true);
1503
1504                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1505                                          elems.wmm_param_len);
1506         }
1507
1508         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1509                 if (directed_tim) {
1510                         if (local->hw.conf.dynamic_ps_timeout > 0) {
1511                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1512                                 ieee80211_hw_config(local,
1513                                                     IEEE80211_CONF_CHANGE_PS);
1514                                 ieee80211_send_nullfunc(local, sdata, 0);
1515                         } else {
1516                                 local->pspolling = true;
1517
1518                                 /*
1519                                  * Here is assumed that the driver will be
1520                                  * able to send ps-poll frame and receive a
1521                                  * response even though power save mode is
1522                                  * enabled, but some drivers might require
1523                                  * to disable power save here. This needs
1524                                  * to be investigated.
1525                                  */
1526                                 ieee80211_send_pspoll(local, sdata);
1527                         }
1528                 }
1529         }
1530
1531         if (ncrc == ifmgd->beacon_crc)
1532                 return;
1533         ifmgd->beacon_crc = ncrc;
1534
1535         if (elems.erp_info && elems.erp_info_len >= 1) {
1536                 erp_valid = true;
1537                 erp_value = elems.erp_info[0];
1538         } else {
1539                 erp_valid = false;
1540         }
1541         changed |= ieee80211_handle_bss_capability(sdata,
1542                         le16_to_cpu(mgmt->u.beacon.capab_info),
1543                         erp_valid, erp_value);
1544
1545
1546         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1547             !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1548                 struct sta_info *sta;
1549                 struct ieee80211_supported_band *sband;
1550                 u16 ap_ht_cap_flags;
1551
1552                 rcu_read_lock();
1553
1554                 sta = sta_info_get(sdata, bssid);
1555                 if (WARN_ON(!sta)) {
1556                         rcu_read_unlock();
1557                         return;
1558                 }
1559
1560                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1561
1562                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1563                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1564
1565                 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1566
1567                 rcu_read_unlock();
1568
1569                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1570                                                bssid, ap_ht_cap_flags);
1571         }
1572
1573         /* Note: country IE parsing is done for us by cfg80211 */
1574         if (elems.country_elem) {
1575                 /* TODO: IBSS also needs this */
1576                 if (elems.pwr_constr_elem)
1577                         ieee80211_handle_pwr_constr(sdata,
1578                                 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1579                                 elems.pwr_constr_elem,
1580                                 elems.pwr_constr_elem_len);
1581         }
1582
1583         ieee80211_bss_info_change_notify(sdata, changed);
1584 }
1585
1586 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1587                                           struct sk_buff *skb)
1588 {
1589         struct ieee80211_local *local = sdata->local;
1590         struct ieee80211_mgmt *mgmt;
1591         u16 fc;
1592
1593         if (skb->len < 24)
1594                 return RX_DROP_MONITOR;
1595
1596         mgmt = (struct ieee80211_mgmt *) skb->data;
1597         fc = le16_to_cpu(mgmt->frame_control);
1598
1599         switch (fc & IEEE80211_FCTL_STYPE) {
1600         case IEEE80211_STYPE_PROBE_RESP:
1601         case IEEE80211_STYPE_BEACON:
1602         case IEEE80211_STYPE_DEAUTH:
1603         case IEEE80211_STYPE_DISASSOC:
1604         case IEEE80211_STYPE_ACTION:
1605                 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1606                 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1607                 return RX_QUEUED;
1608         }
1609
1610         return RX_DROP_MONITOR;
1611 }
1612
1613 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1614                                          struct sk_buff *skb)
1615 {
1616         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1617         struct ieee80211_rx_status *rx_status;
1618         struct ieee80211_mgmt *mgmt;
1619         enum rx_mgmt_action rma = RX_MGMT_NONE;
1620         u16 fc;
1621
1622         rx_status = (struct ieee80211_rx_status *) skb->cb;
1623         mgmt = (struct ieee80211_mgmt *) skb->data;
1624         fc = le16_to_cpu(mgmt->frame_control);
1625
1626         mutex_lock(&ifmgd->mtx);
1627
1628         if (ifmgd->associated &&
1629             memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1630                 switch (fc & IEEE80211_FCTL_STYPE) {
1631                 case IEEE80211_STYPE_BEACON:
1632                         ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1633                                                  rx_status);
1634                         break;
1635                 case IEEE80211_STYPE_PROBE_RESP:
1636                         ieee80211_rx_mgmt_probe_resp(sdata, skb);
1637                         break;
1638                 case IEEE80211_STYPE_DEAUTH:
1639                         rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1640                         break;
1641                 case IEEE80211_STYPE_DISASSOC:
1642                         rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1643                         break;
1644                 case IEEE80211_STYPE_ACTION:
1645                         if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1646                                 break;
1647
1648                         ieee80211_sta_process_chanswitch(sdata,
1649                                         &mgmt->u.action.u.chan_switch.sw_elem,
1650                                         (void *)ifmgd->associated->priv);
1651                         break;
1652                 }
1653                 mutex_unlock(&ifmgd->mtx);
1654
1655                 switch (rma) {
1656                 case RX_MGMT_NONE:
1657                         /* no action */
1658                         break;
1659                 case RX_MGMT_CFG80211_DEAUTH:
1660                         cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1661                         break;
1662                 case RX_MGMT_CFG80211_DISASSOC:
1663                         cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1664                         break;
1665                 default:
1666                         WARN(1, "unexpected: %d", rma);
1667                 }
1668                 goto out;
1669         }
1670
1671         mutex_unlock(&ifmgd->mtx);
1672
1673         if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1674             (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
1675                 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1676
1677  out:
1678         kfree_skb(skb);
1679 }
1680
1681 static void ieee80211_sta_timer(unsigned long data)
1682 {
1683         struct ieee80211_sub_if_data *sdata =
1684                 (struct ieee80211_sub_if_data *) data;
1685         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1686         struct ieee80211_local *local = sdata->local;
1687
1688         if (local->quiescing) {
1689                 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1690                 return;
1691         }
1692
1693         ieee80211_queue_work(&local->hw, &ifmgd->work);
1694 }
1695
1696 static void ieee80211_sta_work(struct work_struct *work)
1697 {
1698         struct ieee80211_sub_if_data *sdata =
1699                 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1700         struct ieee80211_local *local = sdata->local;
1701         struct ieee80211_if_managed *ifmgd;
1702         struct sk_buff *skb;
1703
1704         if (!ieee80211_sdata_running(sdata))
1705                 return;
1706
1707         if (local->scanning)
1708                 return;
1709
1710         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1711                 return;
1712
1713         /*
1714          * ieee80211_queue_work() should have picked up most cases,
1715          * here we'll pick the the rest.
1716          */
1717         if (WARN(local->suspended, "STA MLME work scheduled while "
1718                  "going to suspend\n"))
1719                 return;
1720
1721         ifmgd = &sdata->u.mgd;
1722
1723         /* first process frames to avoid timing out while a frame is pending */
1724         while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1725                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1726
1727         /* then process the rest of the work */
1728         mutex_lock(&ifmgd->mtx);
1729
1730         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1731                             IEEE80211_STA_CONNECTION_POLL) &&
1732             ifmgd->associated) {
1733                 u8 bssid[ETH_ALEN];
1734
1735                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1736                 if (time_is_after_jiffies(ifmgd->probe_timeout))
1737                         run_again(ifmgd, ifmgd->probe_timeout);
1738
1739                 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1740 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1741                         printk(KERN_DEBUG "No probe response from AP %pM"
1742                                 " after %dms, try %d\n", bssid,
1743                                 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1744                                 ifmgd->probe_send_count);
1745 #endif
1746                         ieee80211_mgd_probe_ap_send(sdata);
1747                 } else {
1748                         /*
1749                          * We actually lost the connection ... or did we?
1750                          * Let's make sure!
1751                          */
1752                         ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1753                                           IEEE80211_STA_BEACON_POLL);
1754                         printk(KERN_DEBUG "No probe response from AP %pM"
1755                                 " after %dms, disconnecting.\n",
1756                                 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1757                         ieee80211_set_disassoc(sdata, true);
1758                         ieee80211_recalc_idle(local);
1759                         mutex_unlock(&ifmgd->mtx);
1760                         /*
1761                          * must be outside lock due to cfg80211,
1762                          * but that's not a problem.
1763                          */
1764                         ieee80211_send_deauth_disassoc(sdata, bssid,
1765                                         IEEE80211_STYPE_DEAUTH,
1766                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1767                                         NULL, true);
1768                         mutex_lock(&ifmgd->mtx);
1769                 }
1770         }
1771
1772         mutex_unlock(&ifmgd->mtx);
1773 }
1774
1775 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1776 {
1777         struct ieee80211_sub_if_data *sdata =
1778                 (struct ieee80211_sub_if_data *) data;
1779         struct ieee80211_local *local = sdata->local;
1780
1781         if (local->quiescing)
1782                 return;
1783
1784         ieee80211_queue_work(&sdata->local->hw,
1785                              &sdata->u.mgd.beacon_connection_loss_work);
1786 }
1787
1788 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1789 {
1790         struct ieee80211_sub_if_data *sdata =
1791                 (struct ieee80211_sub_if_data *) data;
1792         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1793         struct ieee80211_local *local = sdata->local;
1794
1795         if (local->quiescing)
1796                 return;
1797
1798         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1799 }
1800
1801 static void ieee80211_sta_monitor_work(struct work_struct *work)
1802 {
1803         struct ieee80211_sub_if_data *sdata =
1804                 container_of(work, struct ieee80211_sub_if_data,
1805                              u.mgd.monitor_work);
1806
1807         ieee80211_mgd_probe_ap(sdata, false);
1808 }
1809
1810 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1811 {
1812         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1813                 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1814                                         IEEE80211_STA_CONNECTION_POLL);
1815
1816                 /* let's probe the connection once */
1817                 ieee80211_queue_work(&sdata->local->hw,
1818                            &sdata->u.mgd.monitor_work);
1819                 /* and do all the other regular work too */
1820                 ieee80211_queue_work(&sdata->local->hw,
1821                            &sdata->u.mgd.work);
1822         }
1823 }
1824
1825 #ifdef CONFIG_PM
1826 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1827 {
1828         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1829
1830         /*
1831          * we need to use atomic bitops for the running bits
1832          * only because both timers might fire at the same
1833          * time -- the code here is properly synchronised.
1834          */
1835
1836         cancel_work_sync(&ifmgd->work);
1837         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1838         if (del_timer_sync(&ifmgd->timer))
1839                 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1840
1841         cancel_work_sync(&ifmgd->chswitch_work);
1842         if (del_timer_sync(&ifmgd->chswitch_timer))
1843                 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1844
1845         cancel_work_sync(&ifmgd->monitor_work);
1846         /* these will just be re-established on connection */
1847         del_timer_sync(&ifmgd->conn_mon_timer);
1848         del_timer_sync(&ifmgd->bcn_mon_timer);
1849 }
1850
1851 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1852 {
1853         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1854
1855         if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1856                 add_timer(&ifmgd->timer);
1857         if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1858                 add_timer(&ifmgd->chswitch_timer);
1859 }
1860 #endif
1861
1862 /* interface setup */
1863 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1864 {
1865         struct ieee80211_if_managed *ifmgd;
1866
1867         ifmgd = &sdata->u.mgd;
1868         INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1869         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1870         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1871         INIT_WORK(&ifmgd->beacon_connection_loss_work,
1872                   ieee80211_beacon_connection_loss_work);
1873         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1874                     (unsigned long) sdata);
1875         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1876                     (unsigned long) sdata);
1877         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1878                     (unsigned long) sdata);
1879         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1880                     (unsigned long) sdata);
1881         skb_queue_head_init(&ifmgd->skb_queue);
1882
1883         ifmgd->flags = 0;
1884
1885         mutex_init(&ifmgd->mtx);
1886
1887         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1888                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1889         else
1890                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1891 }
1892
1893 /* scan finished notification */
1894 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1895 {
1896         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1897
1898         /* Restart STA timers */
1899         rcu_read_lock();
1900         list_for_each_entry_rcu(sdata, &local->interfaces, list)
1901                 ieee80211_restart_sta_timer(sdata);
1902         rcu_read_unlock();
1903 }
1904
1905 int ieee80211_max_network_latency(struct notifier_block *nb,
1906                                   unsigned long data, void *dummy)
1907 {
1908         s32 latency_usec = (s32) data;
1909         struct ieee80211_local *local =
1910                 container_of(nb, struct ieee80211_local,
1911                              network_latency_notifier);
1912
1913         mutex_lock(&local->iflist_mtx);
1914         ieee80211_recalc_ps(local, latency_usec);
1915         mutex_unlock(&local->iflist_mtx);
1916
1917         return 0;
1918 }
1919
1920 /* config hooks */
1921 static enum work_done_result
1922 ieee80211_probe_auth_done(struct ieee80211_work *wk,
1923                           struct sk_buff *skb)
1924 {
1925         if (!skb) {
1926                 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1927                 return WORK_DONE_DESTROY;
1928         }
1929
1930         if (wk->type == IEEE80211_WORK_AUTH) {
1931                 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1932                 return WORK_DONE_DESTROY;
1933         }
1934
1935         mutex_lock(&wk->sdata->u.mgd.mtx);
1936         ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1937         mutex_unlock(&wk->sdata->u.mgd.mtx);
1938
1939         wk->type = IEEE80211_WORK_AUTH;
1940         wk->probe_auth.tries = 0;
1941         return WORK_DONE_REQUEUE;
1942 }
1943
1944 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1945                        struct cfg80211_auth_request *req)
1946 {
1947         const u8 *ssid;
1948         struct ieee80211_work *wk;
1949         u16 auth_alg;
1950
1951         if (req->local_state_change)
1952                 return 0; /* no need to update mac80211 state */
1953
1954         switch (req->auth_type) {
1955         case NL80211_AUTHTYPE_OPEN_SYSTEM:
1956                 auth_alg = WLAN_AUTH_OPEN;
1957                 break;
1958         case NL80211_AUTHTYPE_SHARED_KEY:
1959                 auth_alg = WLAN_AUTH_SHARED_KEY;
1960                 break;
1961         case NL80211_AUTHTYPE_FT:
1962                 auth_alg = WLAN_AUTH_FT;
1963                 break;
1964         case NL80211_AUTHTYPE_NETWORK_EAP:
1965                 auth_alg = WLAN_AUTH_LEAP;
1966                 break;
1967         default:
1968                 return -EOPNOTSUPP;
1969         }
1970
1971         wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1972         if (!wk)
1973                 return -ENOMEM;
1974
1975         memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
1976
1977         if (req->ie && req->ie_len) {
1978                 memcpy(wk->ie, req->ie, req->ie_len);
1979                 wk->ie_len = req->ie_len;
1980         }
1981
1982         if (req->key && req->key_len) {
1983                 wk->probe_auth.key_len = req->key_len;
1984                 wk->probe_auth.key_idx = req->key_idx;
1985                 memcpy(wk->probe_auth.key, req->key, req->key_len);
1986         }
1987
1988         ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
1989         memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1990         wk->probe_auth.ssid_len = ssid[1];
1991
1992         wk->probe_auth.algorithm = auth_alg;
1993         wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
1994
1995         /* if we already have a probe, don't probe again */
1996         if (req->bss->proberesp_ies)
1997                 wk->type = IEEE80211_WORK_AUTH;
1998         else
1999                 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2000         wk->chan = req->bss->channel;
2001         wk->sdata = sdata;
2002         wk->done = ieee80211_probe_auth_done;
2003
2004         ieee80211_add_work(wk);
2005         return 0;
2006 }
2007
2008 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2009                                                   struct sk_buff *skb)
2010 {
2011         struct ieee80211_mgmt *mgmt;
2012         u16 status;
2013
2014         if (!skb) {
2015                 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2016                 return WORK_DONE_DESTROY;
2017         }
2018
2019         mgmt = (void *)skb->data;
2020         status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2021
2022         if (status == WLAN_STATUS_SUCCESS) {
2023                 mutex_lock(&wk->sdata->u.mgd.mtx);
2024                 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2025                         mutex_unlock(&wk->sdata->u.mgd.mtx);
2026                         /* oops -- internal error -- send timeout for now */
2027                         cfg80211_send_assoc_timeout(wk->sdata->dev,
2028                                                     wk->filter_ta);
2029                         return WORK_DONE_DESTROY;
2030                 }
2031                 mutex_unlock(&wk->sdata->u.mgd.mtx);
2032         }
2033
2034         cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2035         return WORK_DONE_DESTROY;
2036 }
2037
2038 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2039                         struct cfg80211_assoc_request *req)
2040 {
2041         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2042         struct ieee80211_bss *bss = (void *)req->bss->priv;
2043         struct ieee80211_work *wk;
2044         const u8 *ssid;
2045         int i;
2046
2047         mutex_lock(&ifmgd->mtx);
2048         if (ifmgd->associated) {
2049                 if (!req->prev_bssid ||
2050                     memcmp(req->prev_bssid, ifmgd->associated->bssid,
2051                            ETH_ALEN)) {
2052                         /*
2053                          * We are already associated and the request was not a
2054                          * reassociation request from the current BSS, so
2055                          * reject it.
2056                          */
2057                         mutex_unlock(&ifmgd->mtx);
2058                         return -EALREADY;
2059                 }
2060
2061                 /* Trying to reassociate - clear previous association state */
2062                 ieee80211_set_disassoc(sdata, true);
2063         }
2064         mutex_unlock(&ifmgd->mtx);
2065
2066         wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2067         if (!wk)
2068                 return -ENOMEM;
2069
2070         ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2071         ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2072
2073         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2074                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2075                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2076                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2077                         ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2078
2079
2080         if (req->ie && req->ie_len) {
2081                 memcpy(wk->ie, req->ie, req->ie_len);
2082                 wk->ie_len = req->ie_len;
2083         } else
2084                 wk->ie_len = 0;
2085
2086         wk->assoc.bss = req->bss;
2087
2088         memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2089
2090         /* new association always uses requested smps mode */
2091         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2092                 if (ifmgd->powersave)
2093                         ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2094                 else
2095                         ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2096         } else
2097                 ifmgd->ap_smps = ifmgd->req_smps;
2098
2099         wk->assoc.smps = ifmgd->ap_smps;
2100         /*
2101          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2102          * We still associate in non-HT mode (11a/b/g) if any one of these
2103          * ciphers is configured as pairwise.
2104          * We can set this to true for non-11n hardware, that'll be checked
2105          * separately along with the peer capabilities.
2106          */
2107         wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2108         wk->assoc.capability = req->bss->capability;
2109         wk->assoc.wmm_used = bss->wmm_used;
2110         wk->assoc.supp_rates = bss->supp_rates;
2111         wk->assoc.supp_rates_len = bss->supp_rates_len;
2112         wk->assoc.ht_information_ie =
2113                 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2114
2115         if (bss->wmm_used && bss->uapsd_supported &&
2116             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2117                 wk->assoc.uapsd_used = true;
2118                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2119         } else {
2120                 wk->assoc.uapsd_used = false;
2121                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2122         }
2123
2124         ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2125         memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2126         wk->assoc.ssid_len = ssid[1];
2127
2128         if (req->prev_bssid)
2129                 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2130
2131         wk->type = IEEE80211_WORK_ASSOC;
2132         wk->chan = req->bss->channel;
2133         wk->sdata = sdata;
2134         wk->done = ieee80211_assoc_done;
2135
2136         if (req->use_mfp) {
2137                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2138                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2139         } else {
2140                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2141                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2142         }
2143
2144         if (req->crypto.control_port)
2145                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2146         else
2147                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2148
2149         ieee80211_add_work(wk);
2150         return 0;
2151 }
2152
2153 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2154                          struct cfg80211_deauth_request *req,
2155                          void *cookie)
2156 {
2157         struct ieee80211_local *local = sdata->local;
2158         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2159         struct ieee80211_work *wk;
2160         const u8 *bssid = req->bss->bssid;
2161
2162         mutex_lock(&ifmgd->mtx);
2163
2164         if (ifmgd->associated == req->bss) {
2165                 bssid = req->bss->bssid;
2166                 ieee80211_set_disassoc(sdata, true);
2167                 mutex_unlock(&ifmgd->mtx);
2168         } else {
2169                 bool not_auth_yet = false;
2170
2171                 mutex_unlock(&ifmgd->mtx);
2172
2173                 mutex_lock(&local->work_mtx);
2174                 list_for_each_entry(wk, &local->work_list, list) {
2175                         if (wk->sdata != sdata)
2176                                 continue;
2177
2178                         if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2179                             wk->type != IEEE80211_WORK_AUTH)
2180                                 continue;
2181
2182                         if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2183                                 continue;
2184
2185                         not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2186                         list_del_rcu(&wk->list);
2187                         free_work(wk);
2188                         break;
2189                 }
2190                 mutex_unlock(&local->work_mtx);
2191
2192                 /*
2193                  * If somebody requests authentication and we haven't
2194                  * sent out an auth frame yet there's no need to send
2195                  * out a deauth frame either. If the state was PROBE,
2196                  * then this is the case. If it's AUTH we have sent a
2197                  * frame, and if it's IDLE we have completed the auth
2198                  * process already.
2199                  */
2200                 if (not_auth_yet) {
2201                         __cfg80211_auth_canceled(sdata->dev, bssid);
2202                         return 0;
2203                 }
2204         }
2205
2206         printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2207                sdata->name, bssid, req->reason_code);
2208
2209         ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2210                                        req->reason_code, cookie,
2211                                        !req->local_state_change);
2212
2213         ieee80211_recalc_idle(sdata->local);
2214
2215         return 0;
2216 }
2217
2218 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2219                            struct cfg80211_disassoc_request *req,
2220                            void *cookie)
2221 {
2222         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2223         u8 bssid[ETH_ALEN];
2224
2225         mutex_lock(&ifmgd->mtx);
2226
2227         /*
2228          * cfg80211 should catch this ... but it's racy since
2229          * we can receive a disassoc frame, process it, hand it
2230          * to cfg80211 while that's in a locked section already
2231          * trying to tell us that the user wants to disconnect.
2232          */
2233         if (ifmgd->associated != req->bss) {
2234                 mutex_unlock(&ifmgd->mtx);
2235                 return -ENOLINK;
2236         }
2237
2238         printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2239                sdata->name, req->bss->bssid, req->reason_code);
2240
2241         memcpy(bssid, req->bss->bssid, ETH_ALEN);
2242         ieee80211_set_disassoc(sdata, false);
2243
2244         mutex_unlock(&ifmgd->mtx);
2245
2246         ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2247                         IEEE80211_STYPE_DISASSOC, req->reason_code,
2248                         cookie, !req->local_state_change);
2249         sta_info_destroy_addr(sdata, bssid);
2250
2251         ieee80211_recalc_idle(sdata->local);
2252
2253         return 0;
2254 }
2255
2256 int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2257                          struct ieee80211_channel *chan,
2258                          enum nl80211_channel_type channel_type,
2259                          const u8 *buf, size_t len, u64 *cookie)
2260 {
2261         struct ieee80211_local *local = sdata->local;
2262         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2263         struct sk_buff *skb;
2264
2265         /* Check that we are on the requested channel for transmission */
2266         if ((chan != local->tmp_channel ||
2267              channel_type != local->tmp_channel_type) &&
2268             (chan != local->oper_channel ||
2269              channel_type != local->oper_channel_type))
2270                 return -EBUSY;
2271
2272         skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2273         if (!skb)
2274                 return -ENOMEM;
2275         skb_reserve(skb, local->hw.extra_tx_headroom);
2276
2277         memcpy(skb_put(skb, len), buf, len);
2278
2279         if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2280                 IEEE80211_SKB_CB(skb)->flags |=
2281                         IEEE80211_TX_INTFL_DONT_ENCRYPT;
2282         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2283                 IEEE80211_TX_CTL_REQ_TX_STATUS;
2284         skb->dev = sdata->dev;
2285         ieee80211_tx_skb(sdata, skb);
2286
2287         *cookie = (unsigned long) skb;
2288         return 0;
2289 }
2290
2291 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2292                                enum nl80211_cqm_rssi_threshold_event rssi_event,
2293                                gfp_t gfp)
2294 {
2295         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2296
2297         trace_api_cqm_rssi_notify(sdata, rssi_event);
2298
2299         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2300 }
2301 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);