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/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  34 #define IEEE80211_AUTH_MAX_TRIES 3
  35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
  36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  37 #define IEEE80211_ASSOC_MAX_TRIES 3
  38
  39 static int max_nullfunc_tries = 2;
  40 module_param(max_nullfunc_tries, int, 0644);
  41 MODULE_PARM_DESC(max_nullfunc_tries,
  42                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  43
  44 static int max_probe_tries = 5;
  45 module_param(max_probe_tries, int, 0644);
  46 MODULE_PARM_DESC(max_probe_tries,
  47                  "Maximum probe tries before disconnecting (reason 4).");
  48
  49 /*
  50  * Beacon loss timeout is calculated as N frames times the
  51  * advertised beacon interval.  This may need to be somewhat
  52  * higher than what hardware might detect to account for
  53  * delays in the host processing frames. But since we also
  54  * probe on beacon miss before declaring the connection lost
  55  * default to what we want.
  56  */
  57 #define IEEE80211_BEACON_LOSS_COUNT     7
  58
  59 /*
  60  * Time the connection can be idle before we probe
  61  * it to see if we can still talk to the AP.
  62  */
  63 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  64 /*
  65  * Time we wait for a probe response after sending
  66  * a probe request because of beacon loss or for
  67  * checking the connection still works.
  68  */
  69 static int probe_wait_ms = 500;
  70 module_param(probe_wait_ms, int, 0644);
  71 MODULE_PARM_DESC(probe_wait_ms,
  72                  "Maximum time(ms) to wait for probe response"
  73                  " before disconnecting (reason 4).");
  74
  75 /*
  76  * Weight given to the latest Beacon frame when calculating average signal
  77  * strength for Beacon frames received in the current BSS. This must be
  78  * between 1 and 15.
  79  */
  80 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  81
  82 /*
  83  * How many Beacon frames need to have been used in average signal strength
  84  * before starting to indicate signal change events.
  85  */
  86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  87
  88 #define TMR_RUNNING_TIMER       0
  89 #define TMR_RUNNING_CHANSW      1
  90
  91 #define DEAUTH_DISASSOC_LEN     (24 /* hdr */ + 2 /* reason */)
  92
  93 /*
  94  * All cfg80211 functions have to be called outside a locked
  95  * section so that they can acquire a lock themselves... This
  96  * is much simpler than queuing up things in cfg80211, but we
  97  * do need some indirection for that here.
  98  */
  99 enum rx_mgmt_action {
 100         /* no action required */
 101         RX_MGMT_NONE,
 102
 103         /* caller must call cfg80211_send_deauth() */
 104         RX_MGMT_CFG80211_DEAUTH,
 105
 106         /* caller must call cfg80211_send_disassoc() */
 107         RX_MGMT_CFG80211_DISASSOC,
 108
 109         /* caller must call cfg80211_send_rx_auth() */
 110         RX_MGMT_CFG80211_RX_AUTH,
 111
 112         /* caller must call cfg80211_send_rx_assoc() */
 113         RX_MGMT_CFG80211_RX_ASSOC,
 114
 115         /* caller must call cfg80211_send_assoc_timeout() */
 116         RX_MGMT_CFG80211_ASSOC_TIMEOUT,
 117 };
 118
 119 /* utils */
 120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
 121 {
 122         lockdep_assert_held(&ifmgd->mtx);
 123 }
 124
 125 /*
 126  * We can have multiple work items (and connection probing)
 127  * scheduling this timer, but we need to take care to only
 128  * reschedule it when it should fire _earlier_ than it was
 129  * asked for before, or if it's not pending right now. This
 130  * function ensures that. Note that it then is required to
 131  * run this function for all timeouts after the first one
 132  * has happened -- the work that runs from this timer will
 133  * do that.
 134  */
 135 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
 136 {
 137         ASSERT_MGD_MTX(ifmgd);
 138
 139         if (!timer_pending(&ifmgd->timer) ||
 140             time_before(timeout, ifmgd->timer.expires))
 141                 mod_timer(&ifmgd->timer, timeout);
 142 }
 143
 144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 145 {
 146         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 147                 return;
 148
 149         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 150                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 151 }
 152
 153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 154 {
 155         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 156
 157         if (unlikely(!sdata->u.mgd.associated))
 158                 return;
 159
 160         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 161                 return;
 162
 163         mod_timer(&sdata->u.mgd.conn_mon_timer,
 164                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 165
 166         ifmgd->probe_send_count = 0;
 167 }
 168
 169 static int ecw2cw(int ecw)
 170 {
 171         return (1 << ecw) - 1;
 172 }
 173
 174 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
 175                                   struct ieee80211_ht_operation *ht_oper,
 176                                   const u8 *bssid, bool reconfig)
 177 {
 178         struct ieee80211_local *local = sdata->local;
 179         struct ieee80211_supported_band *sband;
 180         struct sta_info *sta;
 181         u32 changed = 0;
 182         u16 ht_opmode;
 183         bool disable_40 = false;
 184
 185         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 186
 187         switch (sdata->vif.bss_conf.channel_type) {
 188         case NL80211_CHAN_HT40PLUS:
 189                 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
 190                         disable_40 = true;
 191                 break;
 192         case NL80211_CHAN_HT40MINUS:
 193                 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
 194                         disable_40 = true;
 195                 break;
 196         default:
 197                 break;
 198         }
 199
 200         /* This can change during the lifetime of the BSS */
 201         if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
 202                 disable_40 = true;
 203
 204         mutex_lock(&local->sta_mtx);
 205         sta = sta_info_get(sdata, bssid);
 206
 207         WARN_ON_ONCE(!sta);
 208
 209         if (sta && !sta->supports_40mhz)
 210                 disable_40 = true;
 211
 212         if (sta && (!reconfig ||
 213                     (disable_40 != !(sta->sta.ht_cap.cap &
 214                                         IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
 215
 216                 if (disable_40)
 217                         sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 218                 else
 219                         sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 220
 221                 rate_control_rate_update(local, sband, sta,
 222                                          IEEE80211_RC_BW_CHANGED);
 223         }
 224         mutex_unlock(&local->sta_mtx);
 225
 226         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 227
 228         /* if bss configuration changed store the new one */
 229         if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
 230                 changed |= BSS_CHANGED_HT;
 231                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 232         }
 233
 234         return changed;
 235 }
 236
 237 /* frame sending functions */
 238
 239 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
 240                                       struct ieee80211_supported_band *sband,
 241                                       u32 *rates)
 242 {
 243         int i, j, count;
 244         *rates = 0;
 245         count = 0;
 246         for (i = 0; i < supp_rates_len; i++) {
 247                 int rate = (supp_rates[i] & 0x7F) * 5;
 248
 249                 for (j = 0; j < sband->n_bitrates; j++)
 250                         if (sband->bitrates[j].bitrate == rate) {
 251                                 *rates |= BIT(j);
 252                                 count++;
 253                                 break;
 254                         }
 255         }
 256
 257         return count;
 258 }
 259
 260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 261                                 struct sk_buff *skb, const u8 *ht_oper_ie,
 262                                 struct ieee80211_supported_band *sband,
 263                                 struct ieee80211_channel *channel,
 264                                 enum ieee80211_smps_mode smps)
 265 {
 266         struct ieee80211_ht_operation *ht_oper;
 267         u8 *pos;
 268         u32 flags = channel->flags;
 269         u16 cap;
 270         struct ieee80211_sta_ht_cap ht_cap;
 271
 272         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 273
 274         if (!ht_oper_ie)
 275                 return;
 276
 277         if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
 278                 return;
 279
 280         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 281         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 282
 283         ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
 284
 285         /* determine capability flags */
 286         cap = ht_cap.cap;
 287
 288         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 289         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 290                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 291                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 292                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 293                 }
 294                 break;
 295         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 296                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 297                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 298                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 299                 }
 300                 break;
 301         }
 302
 303         /*
 304          * If 40 MHz was disabled associate as though we weren't
 305          * capable of 40 MHz -- some broken APs will never fall
 306          * back to trying to transmit in 20 MHz.
 307          */
 308         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 309                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 310                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 311         }
 312
 313         /* set SM PS mode properly */
 314         cap &= ~IEEE80211_HT_CAP_SM_PS;
 315         switch (smps) {
 316         case IEEE80211_SMPS_AUTOMATIC:
 317         case IEEE80211_SMPS_NUM_MODES:
 318                 WARN_ON(1);
 319         case IEEE80211_SMPS_OFF:
 320                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 321                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 322                 break;
 323         case IEEE80211_SMPS_STATIC:
 324                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 325                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 326                 break;
 327         case IEEE80211_SMPS_DYNAMIC:
 328                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 329                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 330                 break;
 331         }
 332
 333         /* reserve and fill IE */
 334         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 335         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 336 }
 337
 338 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 339 {
 340         struct ieee80211_local *local = sdata->local;
 341         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 342         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 343         struct sk_buff *skb;
 344         struct ieee80211_mgmt *mgmt;
 345         u8 *pos, qos_info;
 346         size_t offset = 0, noffset;
 347         int i, count, rates_len, supp_rates_len;
 348         u16 capab;
 349         struct ieee80211_supported_band *sband;
 350         u32 rates = 0;
 351
 352         lockdep_assert_held(&ifmgd->mtx);
 353
 354         sband = local->hw.wiphy->bands[local->oper_channel->band];
 355
 356         if (assoc_data->supp_rates_len) {
 357                 /*
 358                  * Get all rates supported by the device and the AP as
 359                  * some APs don't like getting a superset of their rates
 360                  * in the association request (e.g. D-Link DAP 1353 in
 361                  * b-only mode)...
 362                  */
 363                 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
 364                                                        assoc_data->supp_rates_len,
 365                                                        sband, &rates);
 366         } else {
 367                 /*
 368                  * In case AP not provide any supported rates information
 369                  * before association, we send information element(s) with
 370                  * all rates that we support.
 371                  */
 372                 rates = ~0;
 373                 rates_len = sband->n_bitrates;
 374         }
 375
 376         skb = alloc_skb(local->hw.extra_tx_headroom +
 377                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 378                         2 + assoc_data->ssid_len + /* SSID */
 379                         4 + rates_len + /* (extended) rates */
 380                         4 + /* power capability */
 381                         2 + 2 * sband->n_channels + /* supported channels */
 382                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 383                         assoc_data->ie_len + /* extra IEs */
 384                         9, /* WMM */
 385                         GFP_KERNEL);
 386         if (!skb)
 387                 return;
 388
 389         skb_reserve(skb, local->hw.extra_tx_headroom);
 390
 391         capab = WLAN_CAPABILITY_ESS;
 392
 393         if (sband->band == IEEE80211_BAND_2GHZ) {
 394                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 395                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 396                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 397                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 398         }
 399
 400         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 401                 capab |= WLAN_CAPABILITY_PRIVACY;
 402
 403         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 404             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 405                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 406
 407         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 408         memset(mgmt, 0, 24);
 409         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 410         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 411         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 412
 413         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 414                 skb_put(skb, 10);
 415                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 416                                                   IEEE80211_STYPE_REASSOC_REQ);
 417                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 418                 mgmt->u.reassoc_req.listen_interval =
 419                                 cpu_to_le16(local->hw.conf.listen_interval);
 420                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 421                        ETH_ALEN);
 422         } else {
 423                 skb_put(skb, 4);
 424                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 425                                                   IEEE80211_STYPE_ASSOC_REQ);
 426                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 427                 mgmt->u.assoc_req.listen_interval =
 428                                 cpu_to_le16(local->hw.conf.listen_interval);
 429         }
 430
 431         /* SSID */
 432         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 433         *pos++ = WLAN_EID_SSID;
 434         *pos++ = assoc_data->ssid_len;
 435         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 436
 437         /* add all rates which were marked to be used above */
 438         supp_rates_len = rates_len;
 439         if (supp_rates_len > 8)
 440                 supp_rates_len = 8;
 441
 442         pos = skb_put(skb, supp_rates_len + 2);
 443         *pos++ = WLAN_EID_SUPP_RATES;
 444         *pos++ = supp_rates_len;
 445
 446         count = 0;
 447         for (i = 0; i < sband->n_bitrates; i++) {
 448                 if (BIT(i) & rates) {
 449                         int rate = sband->bitrates[i].bitrate;
 450                         *pos++ = (u8) (rate / 5);
 451                         if (++count == 8)
 452                                 break;
 453                 }
 454         }
 455
 456         if (rates_len > count) {
 457                 pos = skb_put(skb, rates_len - count + 2);
 458                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 459                 *pos++ = rates_len - count;
 460
 461                 for (i++; i < sband->n_bitrates; i++) {
 462                         if (BIT(i) & rates) {
 463                                 int rate = sband->bitrates[i].bitrate;
 464                                 *pos++ = (u8) (rate / 5);
 465                         }
 466                 }
 467         }
 468
 469         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 470                 /* 1. power capabilities */
 471                 pos = skb_put(skb, 4);
 472                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 473                 *pos++ = 2;
 474                 *pos++ = 0; /* min tx power */
 475                 *pos++ = local->oper_channel->max_power; /* max tx power */
 476
 477                 /* 2. supported channels */
 478                 /* TODO: get this in reg domain format */
 479                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 480                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 481                 *pos++ = 2 * sband->n_channels;
 482                 for (i = 0; i < sband->n_channels; i++) {
 483                         *pos++ = ieee80211_frequency_to_channel(
 484                                         sband->channels[i].center_freq);
 485                         *pos++ = 1; /* one channel in the subband*/
 486                 }
 487         }
 488
 489         /* if present, add any custom IEs that go before HT */
 490         if (assoc_data->ie_len && assoc_data->ie) {
 491                 static const u8 before_ht[] = {
 492                         WLAN_EID_SSID,
 493                         WLAN_EID_SUPP_RATES,
 494                         WLAN_EID_EXT_SUPP_RATES,
 495                         WLAN_EID_PWR_CAPABILITY,
 496                         WLAN_EID_SUPPORTED_CHANNELS,
 497                         WLAN_EID_RSN,
 498                         WLAN_EID_QOS_CAPA,
 499                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 500                         WLAN_EID_MOBILITY_DOMAIN,
 501                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 502                 };
 503                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 504                                              before_ht, ARRAY_SIZE(before_ht),
 505                                              offset);
 506                 pos = skb_put(skb, noffset - offset);
 507                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 508                 offset = noffset;
 509         }
 510
 511         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
 512                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
 513                                     sband, local->oper_channel, ifmgd->ap_smps);
 514
 515         /* if present, add any custom non-vendor IEs that go after HT */
 516         if (assoc_data->ie_len && assoc_data->ie) {
 517                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 518                                                     assoc_data->ie_len,
 519                                                     offset);
 520                 pos = skb_put(skb, noffset - offset);
 521                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 522                 offset = noffset;
 523         }
 524
 525         if (assoc_data->wmm) {
 526                 if (assoc_data->uapsd) {
 527                         qos_info = ifmgd->uapsd_queues;
 528                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 529                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 530                 } else {
 531                         qos_info = 0;
 532                 }
 533
 534                 pos = skb_put(skb, 9);
 535                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 536                 *pos++ = 7; /* len */
 537                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 538                 *pos++ = 0x50;
 539                 *pos++ = 0xf2;
 540                 *pos++ = 2; /* WME */
 541                 *pos++ = 0; /* WME info */
 542                 *pos++ = 1; /* WME ver */
 543                 *pos++ = qos_info;
 544         }
 545
 546         /* add any remaining custom (i.e. vendor specific here) IEs */
 547         if (assoc_data->ie_len && assoc_data->ie) {
 548                 noffset = assoc_data->ie_len;
 549                 pos = skb_put(skb, noffset - offset);
 550                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 551         }
 552
 553         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 554         ieee80211_tx_skb(sdata, skb);
 555 }
 556
 557 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
 558                                            const u8 *bssid, u16 stype,
 559                                            u16 reason, bool send_frame,
 560                                            u8 *frame_buf)
 561 {
 562         struct ieee80211_local *local = sdata->local;
 563         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 564         struct sk_buff *skb;
 565         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
 566
 567         /* build frame */
 568         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
 569         mgmt->duration = 0; /* initialize only */
 570         mgmt->seq_ctrl = 0; /* initialize only */
 571         memcpy(mgmt->da, bssid, ETH_ALEN);
 572         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 573         memcpy(mgmt->bssid, bssid, ETH_ALEN);
 574         /* u.deauth.reason_code == u.disassoc.reason_code */
 575         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 576
 577         if (send_frame) {
 578                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 579                                     DEAUTH_DISASSOC_LEN);
 580                 if (!skb)
 581                         return;
 582
 583                 skb_reserve(skb, local->hw.extra_tx_headroom);
 584
 585                 /* copy in frame */
 586                 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
 587                        mgmt, DEAUTH_DISASSOC_LEN);
 588
 589                 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
 590                         IEEE80211_SKB_CB(skb)->flags |=
 591                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
 592                 ieee80211_tx_skb(sdata, skb);
 593         }
 594 }
 595
 596 void ieee80211_send_pspoll(struct ieee80211_local *local,
 597                            struct ieee80211_sub_if_data *sdata)
 598 {
 599         struct ieee80211_pspoll *pspoll;
 600         struct sk_buff *skb;
 601
 602         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 603         if (!skb)
 604                 return;
 605
 606         pspoll = (struct ieee80211_pspoll *) skb->data;
 607         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 608
 609         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 610         ieee80211_tx_skb(sdata, skb);
 611 }
 612
 613 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 614                              struct ieee80211_sub_if_data *sdata,
 615                              int powersave)
 616 {
 617         struct sk_buff *skb;
 618         struct ieee80211_hdr_3addr *nullfunc;
 619         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 620
 621         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 622         if (!skb)
 623                 return;
 624
 625         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 626         if (powersave)
 627                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 628
 629         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 630         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
 631                             IEEE80211_STA_CONNECTION_POLL))
 632                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 633
 634         ieee80211_tx_skb(sdata, skb);
 635 }
 636
 637 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 638                                           struct ieee80211_sub_if_data *sdata)
 639 {
 640         struct sk_buff *skb;
 641         struct ieee80211_hdr *nullfunc;
 642         __le16 fc;
 643
 644         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 645                 return;
 646
 647         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 648         if (!skb)
 649                 return;
 650
 651         skb_reserve(skb, local->hw.extra_tx_headroom);
 652
 653         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 654         memset(nullfunc, 0, 30);
 655         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 656                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 657         nullfunc->frame_control = fc;
 658         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 659         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 660         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 661         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 662
 663         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 664         ieee80211_tx_skb(sdata, skb);
 665 }
 666
 667 /* spectrum management related things */
 668 static void ieee80211_chswitch_work(struct work_struct *work)
 669 {
 670         struct ieee80211_sub_if_data *sdata =
 671                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 672         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 673
 674         if (!ieee80211_sdata_running(sdata))
 675                 return;
 676
 677         mutex_lock(&ifmgd->mtx);
 678         if (!ifmgd->associated)
 679                 goto out;
 680
 681         sdata->local->oper_channel = sdata->local->csa_channel;
 682         if (!sdata->local->ops->channel_switch) {
 683                 /* call "hw_config" only if doing sw channel switch */
 684                 ieee80211_hw_config(sdata->local,
 685                         IEEE80211_CONF_CHANGE_CHANNEL);
 686         } else {
 687                 /* update the device channel directly */
 688                 sdata->local->hw.conf.channel = sdata->local->oper_channel;
 689         }
 690
 691         /* XXX: shouldn't really modify cfg80211-owned data! */
 692         ifmgd->associated->channel = sdata->local->oper_channel;
 693
 694         ieee80211_wake_queues_by_reason(&sdata->local->hw,
 695                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 696  out:
 697         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 698         mutex_unlock(&ifmgd->mtx);
 699 }
 700
 701 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 702 {
 703         struct ieee80211_sub_if_data *sdata;
 704         struct ieee80211_if_managed *ifmgd;
 705
 706         sdata = vif_to_sdata(vif);
 707         ifmgd = &sdata->u.mgd;
 708
 709         trace_api_chswitch_done(sdata, success);
 710         if (!success) {
 711                 /*
 712                  * If the channel switch was not successful, stay
 713                  * around on the old channel. We currently lack
 714                  * good handling of this situation, possibly we
 715                  * should just drop the association.
 716                  */
 717                 sdata->local->csa_channel = sdata->local->oper_channel;
 718         }
 719
 720         ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 721 }
 722 EXPORT_SYMBOL(ieee80211_chswitch_done);
 723
 724 static void ieee80211_chswitch_timer(unsigned long data)
 725 {
 726         struct ieee80211_sub_if_data *sdata =
 727                 (struct ieee80211_sub_if_data *) data;
 728         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 729
 730         if (sdata->local->quiescing) {
 731                 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
 732                 return;
 733         }
 734
 735         ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 736 }
 737
 738 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 739                                       struct ieee80211_channel_sw_ie *sw_elem,
 740                                       struct ieee80211_bss *bss,
 741                                       u64 timestamp)
 742 {
 743         struct cfg80211_bss *cbss =
 744                 container_of((void *)bss, struct cfg80211_bss, priv);
 745         struct ieee80211_channel *new_ch;
 746         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 747         int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
 748                                                       cbss->channel->band);
 749
 750         ASSERT_MGD_MTX(ifmgd);
 751
 752         if (!ifmgd->associated)
 753                 return;
 754
 755         if (sdata->local->scanning)
 756                 return;
 757
 758         /* Disregard subsequent beacons if we are already running a timer
 759            processing a CSA */
 760
 761         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
 762                 return;
 763
 764         new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
 765         if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
 766                 return;
 767
 768         sdata->local->csa_channel = new_ch;
 769
 770         if (sdata->local->ops->channel_switch) {
 771                 /* use driver's channel switch callback */
 772                 struct ieee80211_channel_switch ch_switch;
 773                 memset(&ch_switch, 0, sizeof(ch_switch));
 774                 ch_switch.timestamp = timestamp;
 775                 if (sw_elem->mode) {
 776                         ch_switch.block_tx = true;
 777                         ieee80211_stop_queues_by_reason(&sdata->local->hw,
 778                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 779                 }
 780                 ch_switch.channel = new_ch;
 781                 ch_switch.count = sw_elem->count;
 782                 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
 783                 drv_channel_switch(sdata->local, &ch_switch);
 784                 return;
 785         }
 786
 787         /* channel switch handled in software */
 788         if (sw_elem->count <= 1) {
 789                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
 790         } else {
 791                 if (sw_elem->mode)
 792                         ieee80211_stop_queues_by_reason(&sdata->local->hw,
 793                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 794                 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
 795                 mod_timer(&ifmgd->chswitch_timer,
 796                           jiffies +
 797                           msecs_to_jiffies(sw_elem->count *
 798                                            cbss->beacon_interval));
 799         }
 800 }
 801
 802 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
 803                                         u16 capab_info, u8 *pwr_constr_elem,
 804                                         u8 pwr_constr_elem_len)
 805 {
 806         struct ieee80211_conf *conf = &sdata->local->hw.conf;
 807
 808         if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
 809                 return;
 810
 811         /* Power constraint IE length should be 1 octet */
 812         if (pwr_constr_elem_len != 1)
 813                 return;
 814
 815         if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
 816             (*pwr_constr_elem != sdata->local->power_constr_level)) {
 817                 sdata->local->power_constr_level = *pwr_constr_elem;
 818                 ieee80211_hw_config(sdata->local, 0);
 819         }
 820 }
 821
 822 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
 823 {
 824         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 825         struct ieee80211_local *local = sdata->local;
 826         struct ieee80211_conf *conf = &local->hw.conf;
 827
 828         WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
 829                 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
 830                 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
 831
 832         local->disable_dynamic_ps = false;
 833         conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
 834 }
 835 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
 836
 837 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
 838 {
 839         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 840         struct ieee80211_local *local = sdata->local;
 841         struct ieee80211_conf *conf = &local->hw.conf;
 842
 843         WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
 844                 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
 845                 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
 846
 847         local->disable_dynamic_ps = true;
 848         conf->dynamic_ps_timeout = 0;
 849         del_timer_sync(&local->dynamic_ps_timer);
 850         ieee80211_queue_work(&local->hw,
 851                              &local->dynamic_ps_enable_work);
 852 }
 853 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
 854
 855 /* powersave */
 856 static void ieee80211_enable_ps(struct ieee80211_local *local,
 857                                 struct ieee80211_sub_if_data *sdata)
 858 {
 859         struct ieee80211_conf *conf = &local->hw.conf;
 860
 861         /*
 862          * If we are scanning right now then the parameters will
 863          * take effect when scan finishes.
 864          */
 865         if (local->scanning)
 866                 return;
 867
 868         if (conf->dynamic_ps_timeout > 0 &&
 869             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
 870                 mod_timer(&local->dynamic_ps_timer, jiffies +
 871                           msecs_to_jiffies(conf->dynamic_ps_timeout));
 872         } else {
 873                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 874                         ieee80211_send_nullfunc(local, sdata, 1);
 875
 876                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
 877                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
 878                         return;
 879
 880                 conf->flags |= IEEE80211_CONF_PS;
 881                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 882         }
 883 }
 884
 885 static void ieee80211_change_ps(struct ieee80211_local *local)
 886 {
 887         struct ieee80211_conf *conf = &local->hw.conf;
 888
 889         if (local->ps_sdata) {
 890                 ieee80211_enable_ps(local, local->ps_sdata);
 891         } else if (conf->flags & IEEE80211_CONF_PS) {
 892                 conf->flags &= ~IEEE80211_CONF_PS;
 893                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 894                 del_timer_sync(&local->dynamic_ps_timer);
 895                 cancel_work_sync(&local->dynamic_ps_enable_work);
 896         }
 897 }
 898
 899 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
 900 {
 901         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
 902         struct sta_info *sta = NULL;
 903         bool authorized = false;
 904
 905         if (!mgd->powersave)
 906                 return false;
 907
 908         if (mgd->broken_ap)
 909                 return false;
 910
 911         if (!mgd->associated)
 912                 return false;
 913
 914         if (!mgd->associated->beacon_ies)
 915                 return false;
 916
 917         if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
 918                           IEEE80211_STA_CONNECTION_POLL))
 919                 return false;
 920
 921         rcu_read_lock();
 922         sta = sta_info_get(sdata, mgd->bssid);
 923         if (sta)
 924                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
 925         rcu_read_unlock();
 926
 927         return authorized;
 928 }
 929
 930 /* need to hold RTNL or interface lock */
 931 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
 932 {
 933         struct ieee80211_sub_if_data *sdata, *found = NULL;
 934         int count = 0;
 935         int timeout;
 936
 937         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
 938                 local->ps_sdata = NULL;
 939                 return;
 940         }
 941
 942         if (!list_empty(&local->work_list)) {
 943                 local->ps_sdata = NULL;
 944                 goto change;
 945         }
 946
 947         list_for_each_entry(sdata, &local->interfaces, list) {
 948                 if (!ieee80211_sdata_running(sdata))
 949                         continue;
 950                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
 951                         /* If an AP vif is found, then disable PS
 952                          * by setting the count to zero thereby setting
 953                          * ps_sdata to NULL.
 954                          */
 955                         count = 0;
 956                         break;
 957                 }
 958                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
 959                         continue;
 960                 found = sdata;
 961                 count++;
 962         }
 963
 964         if (count == 1 && ieee80211_powersave_allowed(found)) {
 965                 struct ieee80211_conf *conf = &local->hw.conf;
 966                 s32 beaconint_us;
 967
 968                 if (latency < 0)
 969                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
 970
 971                 beaconint_us = ieee80211_tu_to_usec(
 972                                         found->vif.bss_conf.beacon_int);
 973
 974                 timeout = local->dynamic_ps_forced_timeout;
 975                 if (timeout < 0) {
 976                         /*
 977                          * Go to full PSM if the user configures a very low
 978                          * latency requirement.
 979                          * The 2000 second value is there for compatibility
 980                          * until the PM_QOS_NETWORK_LATENCY is configured
 981                          * with real values.
 982                          */
 983                         if (latency > (1900 * USEC_PER_MSEC) &&
 984                             latency != (2000 * USEC_PER_SEC))
 985                                 timeout = 0;
 986                         else
 987                                 timeout = 100;
 988                 }
 989                 local->dynamic_ps_user_timeout = timeout;
 990                 if (!local->disable_dynamic_ps)
 991                         conf->dynamic_ps_timeout =
 992                                 local->dynamic_ps_user_timeout;
 993
 994                 if (beaconint_us > latency) {
 995                         local->ps_sdata = NULL;
 996                 } else {
 997                         struct ieee80211_bss *bss;
 998                         int maxslp = 1;
 999                         u8 dtimper;
1000
1001                         bss = (void *)found->u.mgd.associated->priv;
1002                         dtimper = bss->dtim_period;
1003
1004                         /* If the TIM IE is invalid, pretend the value is 1 */
1005                         if (!dtimper)
1006                                 dtimper = 1;
1007                         else if (dtimper > 1)
1008                                 maxslp = min_t(int, dtimper,
1009                                                     latency / beaconint_us);
1010
1011                         local->hw.conf.max_sleep_period = maxslp;
1012                         local->hw.conf.ps_dtim_period = dtimper;
1013                         local->ps_sdata = found;
1014                 }
1015         } else {
1016                 local->ps_sdata = NULL;
1017         }
1018
1019  change:
1020         ieee80211_change_ps(local);
1021 }
1022
1023 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1024 {
1025         struct ieee80211_local *local =
1026                 container_of(work, struct ieee80211_local,
1027                              dynamic_ps_disable_work);
1028
1029         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1030                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1031                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1032         }
1033
1034         ieee80211_wake_queues_by_reason(&local->hw,
1035                                         IEEE80211_QUEUE_STOP_REASON_PS);
1036 }
1037
1038 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1039 {
1040         struct ieee80211_local *local =
1041                 container_of(work, struct ieee80211_local,
1042                              dynamic_ps_enable_work);
1043         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1044         struct ieee80211_if_managed *ifmgd;
1045         unsigned long flags;
1046         int q;
1047
1048         /* can only happen when PS was just disabled anyway */
1049         if (!sdata)
1050                 return;
1051
1052         ifmgd = &sdata->u.mgd;
1053
1054         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1055                 return;
1056
1057         if (!local->disable_dynamic_ps &&
1058             local->hw.conf.dynamic_ps_timeout > 0) {
1059                 /* don't enter PS if TX frames are pending */
1060                 if (drv_tx_frames_pending(local)) {
1061                         mod_timer(&local->dynamic_ps_timer, jiffies +
1062                                   msecs_to_jiffies(
1063                                   local->hw.conf.dynamic_ps_timeout));
1064                         return;
1065                 }
1066
1067                 /*
1068                  * transmission can be stopped by others which leads to
1069                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1070                  * is not the actual idle state.
1071                  */
1072                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1073                 for (q = 0; q < local->hw.queues; q++) {
1074                         if (local->queue_stop_reasons[q]) {
1075                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1076                                                        flags);
1077                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1078                                           msecs_to_jiffies(
1079                                           local->hw.conf.dynamic_ps_timeout));
1080                                 return;
1081                         }
1082                 }
1083                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1084         }
1085
1086         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1087             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1088                 netif_tx_stop_all_queues(sdata->dev);
1089
1090                 if (drv_tx_frames_pending(local))
1091                         mod_timer(&local->dynamic_ps_timer, jiffies +
1092                                   msecs_to_jiffies(
1093                                   local->hw.conf.dynamic_ps_timeout));
1094                 else {
1095                         ieee80211_send_nullfunc(local, sdata, 1);
1096                         /* Flush to get the tx status of nullfunc frame */
1097                         drv_flush(local, false);
1098                 }
1099         }
1100
1101         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1102               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1103             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1104                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1105                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1106                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1107         }
1108
1109         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1110                 netif_tx_wake_all_queues(sdata->dev);
1111 }
1112
1113 void ieee80211_dynamic_ps_timer(unsigned long data)
1114 {
1115         struct ieee80211_local *local = (void *) data;
1116
1117         if (local->quiescing || local->suspended)
1118                 return;
1119
1120         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1121 }
1122
1123 /* MLME */
1124 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
1125                                      struct ieee80211_sub_if_data *sdata,
1126                                      u8 *wmm_param, size_t wmm_param_len)
1127 {
1128         struct ieee80211_tx_queue_params params;
1129         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1130         size_t left;
1131         int count;
1132         u8 *pos, uapsd_queues = 0;
1133
1134         if (!local->ops->conf_tx)
1135                 return;
1136
1137         if (local->hw.queues < IEEE80211_NUM_ACS)
1138                 return;
1139
1140         if (!wmm_param)
1141                 return;
1142
1143         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1144                 return;
1145
1146         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1147                 uapsd_queues = ifmgd->uapsd_queues;
1148
1149         count = wmm_param[6] & 0x0f;
1150         if (count == ifmgd->wmm_last_param_set)
1151                 return;
1152         ifmgd->wmm_last_param_set = count;
1153
1154         pos = wmm_param + 8;
1155         left = wmm_param_len - 8;
1156
1157         memset(&params, 0, sizeof(params));
1158
1159         local->wmm_acm = 0;
1160         for (; left >= 4; left -= 4, pos += 4) {
1161                 int aci = (pos[0] >> 5) & 0x03;
1162                 int acm = (pos[0] >> 4) & 0x01;
1163                 bool uapsd = false;
1164                 int queue;
1165
1166                 switch (aci) {
1167                 case 1: /* AC_BK */
1168                         queue = 3;
1169                         if (acm)
1170                                 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1171                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1172                                 uapsd = true;
1173                         break;
1174                 case 2: /* AC_VI */
1175                         queue = 1;
1176                         if (acm)
1177                                 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1178                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1179                                 uapsd = true;
1180                         break;
1181                 case 3: /* AC_VO */
1182                         queue = 0;
1183                         if (acm)
1184                                 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1185                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1186                                 uapsd = true;
1187                         break;
1188                 case 0: /* AC_BE */
1189                 default:
1190                         queue = 2;
1191                         if (acm)
1192                                 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1193                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1194                                 uapsd = true;
1195                         break;
1196                 }
1197
1198                 params.aifs = pos[0] & 0x0f;
1199                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1200                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1201                 params.txop = get_unaligned_le16(pos + 2);
1202                 params.uapsd = uapsd;
1203
1204 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1205                 wiphy_debug(local->hw.wiphy,
1206                             "WMM queue=%d aci=%d acm=%d aifs=%d "
1207                             "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1208                             queue, aci, acm,
1209                             params.aifs, params.cw_min, params.cw_max,
1210                             params.txop, params.uapsd);
1211 #endif
1212                 sdata->tx_conf[queue] = params;
1213                 if (drv_conf_tx(local, sdata, queue, &params))
1214                         wiphy_debug(local->hw.wiphy,
1215                                     "failed to set TX queue parameters for queue %d\n",
1216                                     queue);
1217         }
1218
1219         /* enable WMM or activate new settings */
1220         sdata->vif.bss_conf.qos = true;
1221 }
1222
1223 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1224 {
1225         lockdep_assert_held(&sdata->local->mtx);
1226
1227         sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1228                                 IEEE80211_STA_BEACON_POLL);
1229         ieee80211_run_deferred_scan(sdata->local);
1230 }
1231
1232 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1233 {
1234         mutex_lock(&sdata->local->mtx);
1235         __ieee80211_stop_poll(sdata);
1236         mutex_unlock(&sdata->local->mtx);
1237 }
1238
1239 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1240                                            u16 capab, bool erp_valid, u8 erp)
1241 {
1242         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1243         u32 changed = 0;
1244         bool use_protection;
1245         bool use_short_preamble;
1246         bool use_short_slot;
1247
1248         if (erp_valid) {
1249                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1250                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1251         } else {
1252                 use_protection = false;
1253                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1254         }
1255
1256         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1257         if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1258                 use_short_slot = true;
1259
1260         if (use_protection != bss_conf->use_cts_prot) {
1261                 bss_conf->use_cts_prot = use_protection;
1262                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1263         }
1264
1265         if (use_short_preamble != bss_conf->use_short_preamble) {
1266                 bss_conf->use_short_preamble = use_short_preamble;
1267                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1268         }
1269
1270         if (use_short_slot != bss_conf->use_short_slot) {
1271                 bss_conf->use_short_slot = use_short_slot;
1272                 changed |= BSS_CHANGED_ERP_SLOT;
1273         }
1274
1275         return changed;
1276 }
1277
1278 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1279                                      struct cfg80211_bss *cbss,
1280                                      u32 bss_info_changed)
1281 {
1282         struct ieee80211_bss *bss = (void *)cbss->priv;
1283         struct ieee80211_local *local = sdata->local;
1284         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1285
1286         bss_info_changed |= BSS_CHANGED_ASSOC;
1287         /* set timing information */
1288         bss_conf->beacon_int = cbss->beacon_interval;
1289         bss_conf->last_tsf = cbss->tsf;
1290
1291         bss_info_changed |= BSS_CHANGED_BEACON_INT;
1292         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1293                 cbss->capability, bss->has_erp_value, bss->erp_value);
1294
1295         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1296                 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1297
1298         sdata->u.mgd.associated = cbss;
1299         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1300
1301         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1302
1303         /* just to be sure */
1304         ieee80211_stop_poll(sdata);
1305
1306         ieee80211_led_assoc(local, 1);
1307
1308         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1309                 bss_conf->dtim_period = bss->dtim_period;
1310         else
1311                 bss_conf->dtim_period = 0;
1312
1313         bss_conf->assoc = 1;
1314
1315         /* Tell the driver to monitor connection quality (if supported) */
1316         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1317             bss_conf->cqm_rssi_thold)
1318                 bss_info_changed |= BSS_CHANGED_CQM;
1319
1320         /* Enable ARP filtering */
1321         if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1322                 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1323                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1324         }
1325
1326         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1327
1328         mutex_lock(&local->iflist_mtx);
1329         ieee80211_recalc_ps(local, -1);
1330         ieee80211_recalc_smps(local);
1331         mutex_unlock(&local->iflist_mtx);
1332
1333         netif_tx_start_all_queues(sdata->dev);
1334         netif_carrier_on(sdata->dev);
1335 }
1336
1337 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1338                                    u16 stype, u16 reason, bool tx,
1339                                    u8 *frame_buf)
1340 {
1341         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1342         struct ieee80211_local *local = sdata->local;
1343         struct sta_info *sta;
1344         u32 changed = 0;
1345
1346         ASSERT_MGD_MTX(ifmgd);
1347
1348         if (WARN_ON_ONCE(tx && !frame_buf))
1349                 return;
1350
1351         if (WARN_ON(!ifmgd->associated))
1352                 return;
1353
1354         ieee80211_stop_poll(sdata);
1355
1356         ifmgd->associated = NULL;
1357
1358         /*
1359          * we need to commit the associated = NULL change because the
1360          * scan code uses that to determine whether this iface should
1361          * go to/wake up from powersave or not -- and could otherwise
1362          * wake the queues erroneously.
1363          */
1364         smp_mb();
1365
1366         /*
1367          * Thus, we can only afterwards stop the queues -- to account
1368          * for the case where another CPU is finishing a scan at this
1369          * time -- we don't want the scan code to enable queues.
1370          */
1371
1372         netif_tx_stop_all_queues(sdata->dev);
1373         netif_carrier_off(sdata->dev);
1374
1375         mutex_lock(&local->sta_mtx);
1376         sta = sta_info_get(sdata, ifmgd->bssid);
1377         if (sta) {
1378                 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1379                 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1380         }
1381         mutex_unlock(&local->sta_mtx);
1382
1383         /* deauthenticate/disassociate now */
1384         if (tx || frame_buf)
1385                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1386                                                reason, tx, frame_buf);
1387
1388         /* flush out frame */
1389         if (tx)
1390                 drv_flush(local, false);
1391
1392         /* clear bssid only after building the needed mgmt frames */
1393         memset(ifmgd->bssid, 0, ETH_ALEN);
1394
1395         /* remove AP and TDLS peers */
1396         sta_info_flush(local, sdata);
1397
1398         /* finally reset all BSS / config parameters */
1399         changed |= ieee80211_reset_erp_info(sdata);
1400
1401         ieee80211_led_assoc(local, 0);
1402         changed |= BSS_CHANGED_ASSOC;
1403         sdata->vif.bss_conf.assoc = false;
1404
1405         /* on the next assoc, re-program HT parameters */
1406         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1407         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1408
1409         local->power_constr_level = 0;
1410
1411         del_timer_sync(&local->dynamic_ps_timer);
1412         cancel_work_sync(&local->dynamic_ps_enable_work);
1413
1414         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1415                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1416                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1417         }
1418         local->ps_sdata = NULL;
1419
1420         /* Disable ARP filtering */
1421         if (sdata->vif.bss_conf.arp_filter_enabled) {
1422                 sdata->vif.bss_conf.arp_filter_enabled = false;
1423                 changed |= BSS_CHANGED_ARP_FILTER;
1424         }
1425
1426         sdata->vif.bss_conf.qos = false;
1427         changed |= BSS_CHANGED_QOS;
1428
1429         /* The BSSID (not really interesting) and HT changed */
1430         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1431         ieee80211_bss_info_change_notify(sdata, changed);
1432
1433         /* channel(_type) changes are handled by ieee80211_hw_config */
1434         WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1435         ieee80211_hw_config(local, 0);
1436
1437         /* disassociated - set to defaults now */
1438         ieee80211_set_wmm_default(sdata, false);
1439
1440         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1441         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1442         del_timer_sync(&sdata->u.mgd.timer);
1443         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1444 }
1445
1446 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1447                              struct ieee80211_hdr *hdr)
1448 {
1449         /*
1450          * We can postpone the mgd.timer whenever receiving unicast frames
1451          * from AP because we know that the connection is working both ways
1452          * at that time. But multicast frames (and hence also beacons) must
1453          * be ignored here, because we need to trigger the timer during
1454          * data idle periods for sending the periodic probe request to the
1455          * AP we're connected to.
1456          */
1457         if (is_multicast_ether_addr(hdr->addr1))
1458                 return;
1459
1460         ieee80211_sta_reset_conn_monitor(sdata);
1461 }
1462
1463 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1464 {
1465         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1466         struct ieee80211_local *local = sdata->local;
1467
1468         mutex_lock(&local->mtx);
1469         if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1470                               IEEE80211_STA_CONNECTION_POLL))) {
1471                 mutex_unlock(&local->mtx);
1472                 return;
1473         }
1474
1475         __ieee80211_stop_poll(sdata);
1476
1477         mutex_lock(&local->iflist_mtx);
1478         ieee80211_recalc_ps(local, -1);
1479         mutex_unlock(&local->iflist_mtx);
1480
1481         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1482                 goto out;
1483
1484         /*
1485          * We've received a probe response, but are not sure whether
1486          * we have or will be receiving any beacons or data, so let's
1487          * schedule the timers again, just in case.
1488          */
1489         ieee80211_sta_reset_beacon_monitor(sdata);
1490
1491         mod_timer(&ifmgd->conn_mon_timer,
1492                   round_jiffies_up(jiffies +
1493                                    IEEE80211_CONNECTION_IDLE_TIME));
1494 out:
1495         mutex_unlock(&local->mtx);
1496 }
1497
1498 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1499                              struct ieee80211_hdr *hdr, bool ack)
1500 {
1501         if (!ieee80211_is_data(hdr->frame_control))
1502             return;
1503
1504         if (ack)
1505                 ieee80211_sta_reset_conn_monitor(sdata);
1506
1507         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1508             sdata->u.mgd.probe_send_count > 0) {
1509                 if (ack)
1510                         sdata->u.mgd.probe_send_count = 0;
1511                 else
1512                         sdata->u.mgd.nullfunc_failed = true;
1513                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1514         }
1515 }
1516
1517 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1518 {
1519         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1520         const u8 *ssid;
1521         u8 *dst = ifmgd->associated->bssid;
1522         u8 unicast_limit = max(1, max_probe_tries - 3);
1523
1524         /*
1525          * Try sending broadcast probe requests for the last three
1526          * probe requests after the first ones failed since some
1527          * buggy APs only support broadcast probe requests.
1528          */
1529         if (ifmgd->probe_send_count >= unicast_limit)
1530                 dst = NULL;
1531
1532         /*
1533          * When the hardware reports an accurate Tx ACK status, it's
1534          * better to send a nullfunc frame instead of a probe request,
1535          * as it will kick us off the AP quickly if we aren't associated
1536          * anymore. The timeout will be reset if the frame is ACKed by
1537          * the AP.
1538          */
1539         ifmgd->probe_send_count++;
1540
1541         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1542                 ifmgd->nullfunc_failed = false;
1543                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1544         } else {
1545                 int ssid_len;
1546
1547                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1548                 if (WARN_ON_ONCE(ssid == NULL))
1549                         ssid_len = 0;
1550                 else
1551                         ssid_len = ssid[1];
1552
1553                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1554                                          0, (u32) -1, true, false);
1555         }
1556
1557         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1558         run_again(ifmgd, ifmgd->probe_timeout);
1559         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1560                 drv_flush(sdata->local, false);
1561 }
1562
1563 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1564                                    bool beacon)
1565 {
1566         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1567         bool already = false;
1568
1569         if (!ieee80211_sdata_running(sdata))
1570                 return;
1571
1572         mutex_lock(&ifmgd->mtx);
1573
1574         if (!ifmgd->associated)
1575                 goto out;
1576
1577         mutex_lock(&sdata->local->mtx);
1578
1579         if (sdata->local->tmp_channel || sdata->local->scanning) {
1580                 mutex_unlock(&sdata->local->mtx);
1581                 goto out;
1582         }
1583
1584 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1585         if (beacon)
1586                 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1587                                     sdata->name);
1588 #endif
1589
1590         /*
1591          * The driver/our work has already reported this event or the
1592          * connection monitoring has kicked in and we have already sent
1593          * a probe request. Or maybe the AP died and the driver keeps
1594          * reporting until we disassociate...
1595          *
1596          * In either case we have to ignore the current call to this
1597          * function (except for setting the correct probe reason bit)
1598          * because otherwise we would reset the timer every time and
1599          * never check whether we received a probe response!
1600          */
1601         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1602                             IEEE80211_STA_CONNECTION_POLL))
1603                 already = true;
1604
1605         if (beacon)
1606                 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1607         else
1608                 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1609
1610         mutex_unlock(&sdata->local->mtx);
1611
1612         if (already)
1613                 goto out;
1614
1615         mutex_lock(&sdata->local->iflist_mtx);
1616         ieee80211_recalc_ps(sdata->local, -1);
1617         mutex_unlock(&sdata->local->iflist_mtx);
1618
1619         ifmgd->probe_send_count = 0;
1620         ieee80211_mgd_probe_ap_send(sdata);
1621  out:
1622         mutex_unlock(&ifmgd->mtx);
1623 }
1624
1625 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1626                                           struct ieee80211_vif *vif)
1627 {
1628         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1629         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1630         struct sk_buff *skb;
1631         const u8 *ssid;
1632         int ssid_len;
1633
1634         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1635                 return NULL;
1636
1637         ASSERT_MGD_MTX(ifmgd);
1638
1639         if (!ifmgd->associated)
1640                 return NULL;
1641
1642         ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1643         if (WARN_ON_ONCE(ssid == NULL))
1644                 ssid_len = 0;
1645         else
1646                 ssid_len = ssid[1];
1647
1648         skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1649                                         (u32) -1, ssid + 2, ssid_len,
1650                                         NULL, 0, true);
1651
1652         return skb;
1653 }
1654 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1655
1656 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1657 {
1658         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1659         struct ieee80211_local *local = sdata->local;
1660         u8 bssid[ETH_ALEN];
1661         u8 frame_buf[DEAUTH_DISASSOC_LEN];
1662
1663         mutex_lock(&ifmgd->mtx);
1664         if (!ifmgd->associated) {
1665                 mutex_unlock(&ifmgd->mtx);
1666                 return;
1667         }
1668
1669         memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1670
1671         printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1672                sdata->name, bssid);
1673
1674         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1675                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1676                                false, frame_buf);
1677         mutex_unlock(&ifmgd->mtx);
1678
1679         /*
1680          * must be outside lock due to cfg80211,
1681          * but that's not a problem.
1682          */
1683         cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
1684
1685         mutex_lock(&local->mtx);
1686         ieee80211_recalc_idle(local);
1687         mutex_unlock(&local->mtx);
1688 }
1689
1690 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1691 {
1692         struct ieee80211_sub_if_data *sdata =
1693                 container_of(work, struct ieee80211_sub_if_data,
1694                              u.mgd.beacon_connection_loss_work);
1695         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1696         struct sta_info *sta;
1697
1698         if (ifmgd->associated) {
1699                 rcu_read_lock();
1700                 sta = sta_info_get(sdata, ifmgd->bssid);
1701                 if (sta)
1702                         sta->beacon_loss_count++;
1703                 rcu_read_unlock();
1704         }
1705
1706         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1707                 __ieee80211_connection_loss(sdata);
1708         else
1709                 ieee80211_mgd_probe_ap(sdata, true);
1710 }
1711
1712 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1713 {
1714         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1715         struct ieee80211_hw *hw = &sdata->local->hw;
1716
1717         trace_api_beacon_loss(sdata);
1718
1719         WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1720         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1721 }
1722 EXPORT_SYMBOL(ieee80211_beacon_loss);
1723
1724 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1725 {
1726         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1727         struct ieee80211_hw *hw = &sdata->local->hw;
1728
1729         trace_api_connection_loss(sdata);
1730
1731         WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1732         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1733 }
1734 EXPORT_SYMBOL(ieee80211_connection_loss);
1735
1736
1737 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1738                                         bool assoc)
1739 {
1740         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1741
1742         lockdep_assert_held(&sdata->u.mgd.mtx);
1743
1744         if (!assoc) {
1745                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1746
1747                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1748                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1749         }
1750
1751         cfg80211_put_bss(auth_data->bss);
1752         kfree(auth_data);
1753         sdata->u.mgd.auth_data = NULL;
1754 }
1755
1756 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1757                                      struct ieee80211_mgmt *mgmt, size_t len)
1758 {
1759         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1760         u8 *pos;
1761         struct ieee802_11_elems elems;
1762
1763         pos = mgmt->u.auth.variable;
1764         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1765         if (!elems.challenge)
1766                 return;
1767         auth_data->expected_transaction = 4;
1768         ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1769                             elems.challenge - 2, elems.challenge_len + 2,
1770                             auth_data->bss->bssid, auth_data->bss->bssid,
1771                             auth_data->key, auth_data->key_len,
1772                             auth_data->key_idx);
1773 }
1774
1775 static enum rx_mgmt_action __must_check
1776 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1777                        struct ieee80211_mgmt *mgmt, size_t len)
1778 {
1779         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1780         u8 bssid[ETH_ALEN];
1781         u16 auth_alg, auth_transaction, status_code;
1782         struct sta_info *sta;
1783
1784         lockdep_assert_held(&ifmgd->mtx);
1785
1786         if (len < 24 + 6)
1787                 return RX_MGMT_NONE;
1788
1789         if (!ifmgd->auth_data || ifmgd->auth_data->done)
1790                 return RX_MGMT_NONE;
1791
1792         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1793
1794         if (!ether_addr_equal(bssid, mgmt->bssid))
1795                 return RX_MGMT_NONE;
1796
1797         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1798         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1799         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1800
1801         if (auth_alg != ifmgd->auth_data->algorithm ||
1802             auth_transaction != ifmgd->auth_data->expected_transaction)
1803                 return RX_MGMT_NONE;
1804
1805         if (status_code != WLAN_STATUS_SUCCESS) {
1806                 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1807                        sdata->name, mgmt->sa, status_code);
1808                 goto out;
1809         }
1810
1811         switch (ifmgd->auth_data->algorithm) {
1812         case WLAN_AUTH_OPEN:
1813         case WLAN_AUTH_LEAP:
1814         case WLAN_AUTH_FT:
1815                 break;
1816         case WLAN_AUTH_SHARED_KEY:
1817                 if (ifmgd->auth_data->expected_transaction != 4) {
1818                         ieee80211_auth_challenge(sdata, mgmt, len);
1819                         /* need another frame */
1820                         return RX_MGMT_NONE;
1821                 }
1822                 break;
1823         default:
1824                 WARN_ONCE(1, "invalid auth alg %d",
1825                           ifmgd->auth_data->algorithm);
1826                 return RX_MGMT_NONE;
1827         }
1828
1829         printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1830  out:
1831         ifmgd->auth_data->done = true;
1832         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1833         run_again(ifmgd, ifmgd->auth_data->timeout);
1834
1835         /* move station state to auth */
1836         mutex_lock(&sdata->local->sta_mtx);
1837         sta = sta_info_get(sdata, bssid);
1838         if (!sta) {
1839                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1840                 goto out_err;
1841         }
1842         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1843                 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1844                        sdata->name, bssid);
1845                 goto out_err;
1846         }
1847         mutex_unlock(&sdata->local->sta_mtx);
1848
1849         return RX_MGMT_CFG80211_RX_AUTH;
1850  out_err:
1851         mutex_unlock(&sdata->local->sta_mtx);
1852         /* ignore frame -- wait for timeout */
1853         return RX_MGMT_NONE;
1854 }
1855
1856
1857 static enum rx_mgmt_action __must_check
1858 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1859                          struct ieee80211_mgmt *mgmt, size_t len)
1860 {
1861         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1862         const u8 *bssid = NULL;
1863         u16 reason_code;
1864
1865         lockdep_assert_held(&ifmgd->mtx);
1866
1867         if (len < 24 + 2)
1868                 return RX_MGMT_NONE;
1869
1870         if (!ifmgd->associated ||
1871             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1872                 return RX_MGMT_NONE;
1873
1874         bssid = ifmgd->associated->bssid;
1875
1876         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1877
1878         printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1879                         sdata->name, bssid, reason_code);
1880
1881         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1882
1883         mutex_lock(&sdata->local->mtx);
1884         ieee80211_recalc_idle(sdata->local);
1885         mutex_unlock(&sdata->local->mtx);
1886
1887         return RX_MGMT_CFG80211_DEAUTH;
1888 }
1889
1890
1891 static enum rx_mgmt_action __must_check
1892 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1893                            struct ieee80211_mgmt *mgmt, size_t len)
1894 {
1895         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1896         u16 reason_code;
1897
1898         lockdep_assert_held(&ifmgd->mtx);
1899
1900         if (len < 24 + 2)
1901                 return RX_MGMT_NONE;
1902
1903         if (!ifmgd->associated ||
1904             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
1905                 return RX_MGMT_NONE;
1906
1907         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1908
1909         printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1910                         sdata->name, mgmt->sa, reason_code);
1911
1912         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1913
1914         mutex_lock(&sdata->local->mtx);
1915         ieee80211_recalc_idle(sdata->local);
1916         mutex_unlock(&sdata->local->mtx);
1917
1918         return RX_MGMT_CFG80211_DISASSOC;
1919 }
1920
1921 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1922                                 u8 *supp_rates, unsigned int supp_rates_len,
1923                                 u32 *rates, u32 *basic_rates,
1924                                 bool *have_higher_than_11mbit,
1925                                 int *min_rate, int *min_rate_index)
1926 {
1927         int i, j;
1928
1929         for (i = 0; i < supp_rates_len; i++) {
1930                 int rate = (supp_rates[i] & 0x7f) * 5;
1931                 bool is_basic = !!(supp_rates[i] & 0x80);
1932
1933                 if (rate > 110)
1934                         *have_higher_than_11mbit = true;
1935
1936                 /*
1937                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1938                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1939                  *
1940                  * Note: Even through the membership selector and the basic
1941                  *       rate flag share the same bit, they are not exactly
1942                  *       the same.
1943                  */
1944                 if (!!(supp_rates[i] & 0x80) &&
1945                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1946                         continue;
1947
1948                 for (j = 0; j < sband->n_bitrates; j++) {
1949                         if (sband->bitrates[j].bitrate == rate) {
1950                                 *rates |= BIT(j);
1951                                 if (is_basic)
1952                                         *basic_rates |= BIT(j);
1953                                 if (rate < *min_rate) {
1954                                         *min_rate = rate;
1955                                         *min_rate_index = j;
1956                                 }
1957                                 break;
1958                         }
1959                 }
1960         }
1961 }
1962
1963 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1964                                          bool assoc)
1965 {
1966         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1967
1968         lockdep_assert_held(&sdata->u.mgd.mtx);
1969
1970         if (!assoc) {
1971                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1972
1973                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1974                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1975         }
1976
1977         kfree(assoc_data);
1978         sdata->u.mgd.assoc_data = NULL;
1979 }
1980
1981 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1982                                     struct cfg80211_bss *cbss,
1983                                     struct ieee80211_mgmt *mgmt, size_t len)
1984 {
1985         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1986         struct ieee80211_local *local = sdata->local;
1987         struct ieee80211_supported_band *sband;
1988         struct sta_info *sta;
1989         u8 *pos;
1990         u16 capab_info, aid;
1991         struct ieee802_11_elems elems;
1992         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1993         u32 changed = 0;
1994         int err;
1995
1996         /* AssocResp and ReassocResp have identical structure */
1997
1998         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1999         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2000
2001         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2002                 printk(KERN_DEBUG
2003                        "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2004                        sdata->name, aid);
2005         aid &= ~(BIT(15) | BIT(14));
2006
2007         ifmgd->broken_ap = false;
2008
2009         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2010                 printk(KERN_DEBUG
2011                        "%s: invalid AID value %d (out of range), turn off PS\n",
2012                        sdata->name, aid);
2013                 aid = 0;
2014                 ifmgd->broken_ap = true;
2015         }
2016
2017         pos = mgmt->u.assoc_resp.variable;
2018         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2019
2020         if (!elems.supp_rates) {
2021                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2022                        sdata->name);
2023                 return false;
2024         }
2025
2026         ifmgd->aid = aid;
2027
2028         mutex_lock(&sdata->local->sta_mtx);
2029         /*
2030          * station info was already allocated and inserted before
2031          * the association and should be available to us
2032          */
2033         sta = sta_info_get(sdata, cbss->bssid);
2034         if (WARN_ON(!sta)) {
2035                 mutex_unlock(&sdata->local->sta_mtx);
2036                 return false;
2037         }
2038
2039         sband = local->hw.wiphy->bands[local->oper_channel->band];
2040
2041         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2042                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2043                                 elems.ht_cap_elem, &sta->sta.ht_cap);
2044
2045         sta->supports_40mhz =
2046                 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2047
2048         rate_control_rate_init(sta);
2049
2050         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2051                 set_sta_flag(sta, WLAN_STA_MFP);
2052
2053         if (elems.wmm_param)
2054                 set_sta_flag(sta, WLAN_STA_WME);
2055
2056         err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2057         if (!err)
2058                 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2059         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2060                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2061         if (err) {
2062                 printk(KERN_DEBUG
2063                        "%s: failed to move station %pM to desired state\n",
2064                        sdata->name, sta->sta.addr);
2065                 WARN_ON(__sta_info_destroy(sta));
2066                 mutex_unlock(&sdata->local->sta_mtx);
2067                 return false;
2068         }
2069
2070         mutex_unlock(&sdata->local->sta_mtx);
2071
2072         /*
2073          * Always handle WMM once after association regardless
2074          * of the first value the AP uses. Setting -1 here has
2075          * that effect because the AP values is an unsigned
2076          * 4-bit value.
2077          */
2078         ifmgd->wmm_last_param_set = -1;
2079
2080         if (elems.wmm_param)
2081                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2082                                          elems.wmm_param_len);
2083         else
2084                 ieee80211_set_wmm_default(sdata, false);
2085         changed |= BSS_CHANGED_QOS;
2086
2087         if (elems.ht_operation && elems.wmm_param &&
2088             !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
2089                 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2090                                                   cbss->bssid, false);
2091
2092         /* set AID and assoc capability,
2093          * ieee80211_set_associated() will tell the driver */
2094         bss_conf->aid = aid;
2095         bss_conf->assoc_capability = capab_info;
2096         ieee80211_set_associated(sdata, cbss, changed);
2097
2098         /*
2099          * If we're using 4-addr mode, let the AP know that we're
2100          * doing so, so that it can create the STA VLAN on its side
2101          */
2102         if (ifmgd->use_4addr)
2103                 ieee80211_send_4addr_nullfunc(local, sdata);
2104
2105         /*
2106          * Start timer to probe the connection to the AP now.
2107          * Also start the timer that will detect beacon loss.
2108          */
2109         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2110         ieee80211_sta_reset_beacon_monitor(sdata);
2111
2112         return true;
2113 }
2114
2115 static enum rx_mgmt_action __must_check
2116 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2117                              struct ieee80211_mgmt *mgmt, size_t len,
2118                              struct cfg80211_bss **bss)
2119 {
2120         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2121         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2122         u16 capab_info, status_code, aid;
2123         struct ieee802_11_elems elems;
2124         u8 *pos;
2125         bool reassoc;
2126
2127         lockdep_assert_held(&ifmgd->mtx);
2128
2129         if (!assoc_data)
2130                 return RX_MGMT_NONE;
2131         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2132                 return RX_MGMT_NONE;
2133
2134         /*
2135          * AssocResp and ReassocResp have identical structure, so process both
2136          * of them in this function.
2137          */
2138
2139         if (len < 24 + 6)
2140                 return RX_MGMT_NONE;
2141
2142         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2143         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2144         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2145         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2146
2147         printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2148                "status=%d aid=%d)\n",
2149                sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2150                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2151
2152         pos = mgmt->u.assoc_resp.variable;
2153         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2154
2155         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2156             elems.timeout_int && elems.timeout_int_len == 5 &&
2157             elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2158                 u32 tu, ms;
2159                 tu = get_unaligned_le32(elems.timeout_int + 1);
2160                 ms = tu * 1024 / 1000;
2161                 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2162                        "comeback duration %u TU (%u ms)\n",
2163                        sdata->name, mgmt->sa, tu, ms);
2164                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2165                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2166                         run_again(ifmgd, assoc_data->timeout);
2167                 return RX_MGMT_NONE;
2168         }
2169
2170         *bss = assoc_data->bss;
2171
2172         if (status_code != WLAN_STATUS_SUCCESS) {
2173                 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2174                        sdata->name, mgmt->sa, status_code);
2175                 ieee80211_destroy_assoc_data(sdata, false);
2176         } else {
2177                 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2178
2179                 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2180                         /* oops -- internal error -- send timeout for now */
2181                         ieee80211_destroy_assoc_data(sdata, true);
2182                         sta_info_destroy_addr(sdata, mgmt->bssid);
2183                         cfg80211_put_bss(*bss);
2184                         return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2185                 }
2186
2187                 /*
2188                  * destroy assoc_data afterwards, as otherwise an idle
2189                  * recalc after assoc_data is NULL but before associated
2190                  * is set can cause the interface to go idle
2191                  */
2192                 ieee80211_destroy_assoc_data(sdata, true);
2193         }
2194
2195         return RX_MGMT_CFG80211_RX_ASSOC;
2196 }
2197 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2198                                   struct ieee80211_mgmt *mgmt,
2199                                   size_t len,
2200                                   struct ieee80211_rx_status *rx_status,
2201                                   struct ieee802_11_elems *elems,
2202                                   bool beacon)
2203 {
2204         struct ieee80211_local *local = sdata->local;
2205         int freq;
2206         struct ieee80211_bss *bss;
2207         struct ieee80211_channel *channel;
2208         bool need_ps = false;
2209
2210         if (sdata->u.mgd.associated &&
2211             ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
2212                 bss = (void *)sdata->u.mgd.associated->priv;
2213                 /* not previously set so we may need to recalc */
2214                 need_ps = !bss->dtim_period;
2215         }
2216
2217         if (elems->ds_params && elems->ds_params_len == 1)
2218                 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2219                                                       rx_status->band);
2220         else
2221                 freq = rx_status->freq;
2222
2223         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2224
2225         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2226                 return;
2227
2228         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2229                                         channel, beacon);
2230         if (bss)
2231                 ieee80211_rx_bss_put(local, bss);
2232
2233         if (!sdata->u.mgd.associated)
2234                 return;
2235
2236         if (need_ps) {
2237                 mutex_lock(&local->iflist_mtx);
2238                 ieee80211_recalc_ps(local, -1);
2239                 mutex_unlock(&local->iflist_mtx);
2240         }
2241
2242         if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
2243             (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2244                                                         ETH_ALEN) == 0)) {
2245                 struct ieee80211_channel_sw_ie *sw_elem =
2246                         (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
2247                 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2248                                                  bss, rx_status->mactime);
2249         }
2250 }
2251
2252
2253 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2254                                          struct sk_buff *skb)
2255 {
2256         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2257         struct ieee80211_if_managed *ifmgd;
2258         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2259         size_t baselen, len = skb->len;
2260         struct ieee802_11_elems elems;
2261
2262         ifmgd = &sdata->u.mgd;
2263
2264         ASSERT_MGD_MTX(ifmgd);
2265
2266         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2267                 return; /* ignore ProbeResp to foreign address */
2268
2269         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2270         if (baselen > len)
2271                 return;
2272
2273         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2274                                 &elems);
2275
2276         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2277
2278         if (ifmgd->associated &&
2279             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2280                 ieee80211_reset_ap_probe(sdata);
2281
2282         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2283             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2284                 /* got probe response, continue with auth */
2285                 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2286                 ifmgd->auth_data->tries = 0;
2287                 ifmgd->auth_data->timeout = jiffies;
2288                 run_again(ifmgd, ifmgd->auth_data->timeout);
2289         }
2290 }
2291
2292 /*
2293  * This is the canonical list of information elements we care about,
2294  * the filter code also gives us all changes to the Microsoft OUI
2295  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2296  *
2297  * We implement beacon filtering in software since that means we can
2298  * avoid processing the frame here and in cfg80211, and userspace
2299  * will not be able to tell whether the hardware supports it or not.
2300  *
2301  * XXX: This list needs to be dynamic -- userspace needs to be able to
2302  *      add items it requires. It also needs to be able to tell us to
2303  *      look out for other vendor IEs.
2304  */
2305 static const u64 care_about_ies =
2306         (1ULL << WLAN_EID_COUNTRY) |
2307         (1ULL << WLAN_EID_ERP_INFO) |
2308         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2309         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2310         (1ULL << WLAN_EID_HT_CAPABILITY) |
2311         (1ULL << WLAN_EID_HT_OPERATION);
2312
2313 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2314                                      struct ieee80211_mgmt *mgmt,
2315                                      size_t len,
2316                                      struct ieee80211_rx_status *rx_status)
2317 {
2318         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2319         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2320         size_t baselen;
2321         struct ieee802_11_elems elems;
2322         struct ieee80211_local *local = sdata->local;
2323         u32 changed = 0;
2324         bool erp_valid, directed_tim = false;
2325         u8 erp_value = 0;
2326         u32 ncrc;
2327         u8 *bssid;
2328
2329         lockdep_assert_held(&ifmgd->mtx);
2330
2331         /* Process beacon from the current BSS */
2332         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2333         if (baselen > len)
2334                 return;
2335
2336         if (rx_status->freq != local->hw.conf.channel->center_freq)
2337                 return;
2338
2339         if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2340             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2341                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2342                                        len - baselen, &elems);
2343
2344                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2345                                       false);
2346                 ifmgd->assoc_data->have_beacon = true;
2347                 ifmgd->assoc_data->sent_assoc = false;
2348                 /* continue assoc process */
2349                 ifmgd->assoc_data->timeout = jiffies;
2350                 run_again(ifmgd, ifmgd->assoc_data->timeout);
2351                 return;
2352         }
2353
2354         if (!ifmgd->associated ||
2355             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2356                 return;
2357         bssid = ifmgd->associated->bssid;
2358
2359         /* Track average RSSI from the Beacon frames of the current AP */
2360         ifmgd->last_beacon_signal = rx_status->signal;
2361         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2362                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2363                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2364                 ifmgd->last_cqm_event_signal = 0;
2365                 ifmgd->count_beacon_signal = 1;
2366                 ifmgd->last_ave_beacon_signal = 0;
2367         } else {
2368                 ifmgd->ave_beacon_signal =
2369                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2370                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2371                          ifmgd->ave_beacon_signal) / 16;
2372                 ifmgd->count_beacon_signal++;
2373         }
2374
2375         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2376             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2377                 int sig = ifmgd->ave_beacon_signal;
2378                 int last_sig = ifmgd->last_ave_beacon_signal;
2379
2380                 /*
2381                  * if signal crosses either of the boundaries, invoke callback
2382                  * with appropriate parameters
2383                  */
2384                 if (sig > ifmgd->rssi_max_thold &&
2385                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2386                         ifmgd->last_ave_beacon_signal = sig;
2387                         drv_rssi_callback(local, RSSI_EVENT_HIGH);
2388                 } else if (sig < ifmgd->rssi_min_thold &&
2389                            (last_sig >= ifmgd->rssi_max_thold ||
2390                            last_sig == 0)) {
2391                         ifmgd->last_ave_beacon_signal = sig;
2392                         drv_rssi_callback(local, RSSI_EVENT_LOW);
2393                 }
2394         }
2395
2396         if (bss_conf->cqm_rssi_thold &&
2397             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2398             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2399                 int sig = ifmgd->ave_beacon_signal / 16;
2400                 int last_event = ifmgd->last_cqm_event_signal;
2401                 int thold = bss_conf->cqm_rssi_thold;
2402                 int hyst = bss_conf->cqm_rssi_hyst;
2403                 if (sig < thold &&
2404                     (last_event == 0 || sig < last_event - hyst)) {
2405                         ifmgd->last_cqm_event_signal = sig;
2406                         ieee80211_cqm_rssi_notify(
2407                                 &sdata->vif,
2408                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2409                                 GFP_KERNEL);
2410                 } else if (sig > thold &&
2411                            (last_event == 0 || sig > last_event + hyst)) {
2412                         ifmgd->last_cqm_event_signal = sig;
2413                         ieee80211_cqm_rssi_notify(
2414                                 &sdata->vif,
2415                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2416                                 GFP_KERNEL);
2417                 }
2418         }
2419
2420         if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2421 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2422                 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2423                                     sdata->name);
2424 #endif
2425                 mutex_lock(&local->mtx);
2426                 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2427                 ieee80211_run_deferred_scan(local);
2428                 mutex_unlock(&local->mtx);
2429
2430                 mutex_lock(&local->iflist_mtx);
2431                 ieee80211_recalc_ps(local, -1);
2432                 mutex_unlock(&local->iflist_mtx);
2433         }
2434
2435         /*
2436          * Push the beacon loss detection into the future since
2437          * we are processing a beacon from the AP just now.
2438          */
2439         ieee80211_sta_reset_beacon_monitor(sdata);
2440
2441         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2442         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2443                                           len - baselen, &elems,
2444                                           care_about_ies, ncrc);
2445
2446         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2447                 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2448                                                    ifmgd->aid);
2449
2450         if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
2451                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2452                                       true);
2453
2454                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2455                                          elems.wmm_param_len);
2456         }
2457
2458         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2459                 if (directed_tim) {
2460                         if (local->hw.conf.dynamic_ps_timeout > 0) {
2461                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2462                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2463                                         ieee80211_hw_config(local,
2464                                                             IEEE80211_CONF_CHANGE_PS);
2465                                 }
2466                                 ieee80211_send_nullfunc(local, sdata, 0);
2467                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
2468                                 local->pspolling = true;
2469
2470                                 /*
2471                                  * Here is assumed that the driver will be
2472                                  * able to send ps-poll frame and receive a
2473                                  * response even though power save mode is
2474                                  * enabled, but some drivers might require
2475                                  * to disable power save here. This needs
2476                                  * to be investigated.
2477                                  */
2478                                 ieee80211_send_pspoll(local, sdata);
2479                         }
2480                 }
2481         }
2482
2483         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2484                 return;
2485         ifmgd->beacon_crc = ncrc;
2486         ifmgd->beacon_crc_valid = true;
2487
2488         if (elems.erp_info && elems.erp_info_len >= 1) {
2489                 erp_valid = true;
2490                 erp_value = elems.erp_info[0];
2491         } else {
2492                 erp_valid = false;
2493         }
2494         changed |= ieee80211_handle_bss_capability(sdata,
2495                         le16_to_cpu(mgmt->u.beacon.capab_info),
2496                         erp_valid, erp_value);
2497
2498
2499         if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2500             !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
2501                 struct ieee80211_supported_band *sband;
2502
2503                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2504
2505                 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2506                                                   bssid, true);
2507         }
2508
2509         /* Note: country IE parsing is done for us by cfg80211 */
2510         if (elems.country_elem) {
2511                 /* TODO: IBSS also needs this */
2512                 if (elems.pwr_constr_elem)
2513                         ieee80211_handle_pwr_constr(sdata,
2514                                 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2515                                 elems.pwr_constr_elem,
2516                                 elems.pwr_constr_elem_len);
2517         }
2518
2519         ieee80211_bss_info_change_notify(sdata, changed);
2520 }
2521
2522 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2523                                   struct sk_buff *skb)
2524 {
2525         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2526         struct ieee80211_rx_status *rx_status;
2527         struct ieee80211_mgmt *mgmt;
2528         struct cfg80211_bss *bss = NULL;
2529         enum rx_mgmt_action rma = RX_MGMT_NONE;
2530         u16 fc;
2531
2532         rx_status = (struct ieee80211_rx_status *) skb->cb;
2533         mgmt = (struct ieee80211_mgmt *) skb->data;
2534         fc = le16_to_cpu(mgmt->frame_control);
2535
2536         mutex_lock(&ifmgd->mtx);
2537
2538         switch (fc & IEEE80211_FCTL_STYPE) {
2539         case IEEE80211_STYPE_BEACON:
2540                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2541                 break;
2542         case IEEE80211_STYPE_PROBE_RESP:
2543                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2544                 break;
2545         case IEEE80211_STYPE_AUTH:
2546                 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2547                 break;
2548         case IEEE80211_STYPE_DEAUTH:
2549                 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2550                 break;
2551         case IEEE80211_STYPE_DISASSOC:
2552                 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2553                 break;
2554         case IEEE80211_STYPE_ASSOC_RESP:
2555         case IEEE80211_STYPE_REASSOC_RESP:
2556                 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2557                 break;
2558         case IEEE80211_STYPE_ACTION:
2559                 switch (mgmt->u.action.category) {
2560                 case WLAN_CATEGORY_SPECTRUM_MGMT:
2561                         ieee80211_sta_process_chanswitch(sdata,
2562                                         &mgmt->u.action.u.chan_switch.sw_elem,
2563                                         (void *)ifmgd->associated->priv,
2564                                         rx_status->mactime);
2565                         break;
2566                 }
2567         }
2568         mutex_unlock(&ifmgd->mtx);
2569
2570         switch (rma) {
2571         case RX_MGMT_NONE:
2572                 /* no action */
2573                 break;
2574         case RX_MGMT_CFG80211_DEAUTH:
2575                 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2576                 break;
2577         case RX_MGMT_CFG80211_DISASSOC:
2578                 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2579                 break;
2580         case RX_MGMT_CFG80211_RX_AUTH:
2581                 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2582                 break;
2583         case RX_MGMT_CFG80211_RX_ASSOC:
2584                 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2585                 break;
2586         case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2587                 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2588                 break;
2589         default:
2590                 WARN(1, "unexpected: %d", rma);
2591         }
2592 }
2593
2594 static void ieee80211_sta_timer(unsigned long data)
2595 {
2596         struct ieee80211_sub_if_data *sdata =
2597                 (struct ieee80211_sub_if_data *) data;
2598         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2599         struct ieee80211_local *local = sdata->local;
2600
2601         if (local->quiescing) {
2602                 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2603                 return;
2604         }
2605
2606         ieee80211_queue_work(&local->hw, &sdata->work);
2607 }
2608
2609 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2610                                           u8 *bssid, u8 reason)
2611 {
2612         struct ieee80211_local *local = sdata->local;
2613         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2614         u8 frame_buf[DEAUTH_DISASSOC_LEN];
2615
2616         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2617                                false, frame_buf);
2618         mutex_unlock(&ifmgd->mtx);
2619
2620         /*
2621          * must be outside lock due to cfg80211,
2622          * but that's not a problem.
2623          */
2624         cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
2625
2626         mutex_lock(&local->mtx);
2627         ieee80211_recalc_idle(local);
2628         mutex_unlock(&local->mtx);
2629
2630         mutex_lock(&ifmgd->mtx);
2631 }
2632
2633 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2634 {
2635         struct ieee80211_local *local = sdata->local;
2636         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2637         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2638
2639         lockdep_assert_held(&ifmgd->mtx);
2640
2641         if (WARN_ON_ONCE(!auth_data))
2642                 return -EINVAL;
2643
2644         auth_data->tries++;
2645
2646         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2647                 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2648                        sdata->name, auth_data->bss->bssid);
2649
2650                 /*
2651                  * Most likely AP is not in the range so remove the
2652                  * bss struct for that AP.
2653                  */
2654                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2655
2656                 return -ETIMEDOUT;
2657         }
2658
2659         if (auth_data->bss->proberesp_ies) {
2660                 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2661                        sdata->name, auth_data->bss->bssid, auth_data->tries,
2662                        IEEE80211_AUTH_MAX_TRIES);
2663
2664                 auth_data->expected_transaction = 2;
2665                 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2666                                     auth_data->ie, auth_data->ie_len,
2667                                     auth_data->bss->bssid,
2668                                     auth_data->bss->bssid, NULL, 0, 0);
2669         } else {
2670                 const u8 *ssidie;
2671
2672                 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2673                        sdata->name, auth_data->bss->bssid, auth_data->tries,
2674                        IEEE80211_AUTH_MAX_TRIES);
2675
2676                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2677                 if (!ssidie)
2678                         return -EINVAL;
2679                 /*
2680                  * Direct probe is sent to broadcast address as some APs
2681                  * will not answer to direct packet in unassociated state.
2682                  */
2683                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2684                                          NULL, 0, (u32) -1, true, false);
2685         }
2686
2687         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2688         run_again(ifmgd, auth_data->timeout);
2689
2690         return 0;
2691 }
2692
2693 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2694 {
2695         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2696         struct ieee80211_local *local = sdata->local;
2697
2698         lockdep_assert_held(&sdata->u.mgd.mtx);
2699
2700         assoc_data->tries++;
2701         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2702                 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2703                        sdata->name, assoc_data->bss->bssid);
2704
2705                 /*
2706                  * Most likely AP is not in the range so remove the
2707                  * bss struct for that AP.
2708                  */
2709                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2710
2711                 return -ETIMEDOUT;
2712         }
2713
2714         printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2715                sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2716                IEEE80211_ASSOC_MAX_TRIES);
2717         ieee80211_send_assoc(sdata);
2718
2719         assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2720         run_again(&sdata->u.mgd, assoc_data->timeout);
2721
2722         return 0;
2723 }
2724
2725 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2726 {
2727         struct ieee80211_local *local = sdata->local;
2728         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2729
2730         mutex_lock(&ifmgd->mtx);
2731
2732         if (ifmgd->auth_data &&
2733             time_after(jiffies, ifmgd->auth_data->timeout)) {
2734                 if (ifmgd->auth_data->done) {
2735                         /*
2736                          * ok ... we waited for assoc but userspace didn't,
2737                          * so let's just kill the auth data
2738                          */
2739                         ieee80211_destroy_auth_data(sdata, false);
2740                 } else if (ieee80211_probe_auth(sdata)) {
2741                         u8 bssid[ETH_ALEN];
2742
2743                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2744
2745                         ieee80211_destroy_auth_data(sdata, false);
2746
2747                         mutex_unlock(&ifmgd->mtx);
2748                         cfg80211_send_auth_timeout(sdata->dev, bssid);
2749                         mutex_lock(&ifmgd->mtx);
2750                 }
2751         } else if (ifmgd->auth_data)
2752                 run_again(ifmgd, ifmgd->auth_data->timeout);
2753
2754         if (ifmgd->assoc_data &&
2755             time_after(jiffies, ifmgd->assoc_data->timeout)) {
2756                 if (!ifmgd->assoc_data->have_beacon ||
2757                     ieee80211_do_assoc(sdata)) {
2758                         u8 bssid[ETH_ALEN];
2759
2760                         memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2761
2762                         ieee80211_destroy_assoc_data(sdata, false);
2763
2764                         mutex_unlock(&ifmgd->mtx);
2765                         cfg80211_send_assoc_timeout(sdata->dev, bssid);
2766                         mutex_lock(&ifmgd->mtx);
2767                 }
2768         } else if (ifmgd->assoc_data)
2769                 run_again(ifmgd, ifmgd->assoc_data->timeout);
2770
2771         if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2772                             IEEE80211_STA_CONNECTION_POLL) &&
2773             ifmgd->associated) {
2774                 u8 bssid[ETH_ALEN];
2775                 int max_tries;
2776
2777                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2778
2779                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2780                         max_tries = max_nullfunc_tries;
2781                 else
2782                         max_tries = max_probe_tries;
2783
2784                 /* ACK received for nullfunc probing frame */
2785                 if (!ifmgd->probe_send_count)
2786                         ieee80211_reset_ap_probe(sdata);
2787                 else if (ifmgd->nullfunc_failed) {
2788                         if (ifmgd->probe_send_count < max_tries) {
2789 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2790                                 wiphy_debug(local->hw.wiphy,
2791                                             "%s: No ack for nullfunc frame to"
2792                                             " AP %pM, try %d/%i\n",
2793                                             sdata->name, bssid,
2794                                             ifmgd->probe_send_count, max_tries);
2795 #endif
2796                                 ieee80211_mgd_probe_ap_send(sdata);
2797                         } else {
2798 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2799                                 wiphy_debug(local->hw.wiphy,
2800                                             "%s: No ack for nullfunc frame to"
2801                                             " AP %pM, disconnecting.\n",
2802                                             sdata->name, bssid);
2803 #endif
2804                                 ieee80211_sta_connection_lost(sdata, bssid,
2805                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2806                         }
2807                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2808                         run_again(ifmgd, ifmgd->probe_timeout);
2809                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2810 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2811                         wiphy_debug(local->hw.wiphy,
2812                                     "%s: Failed to send nullfunc to AP %pM"
2813                                     " after %dms, disconnecting.\n",
2814                                     sdata->name,
2815                                     bssid, probe_wait_ms);
2816 #endif
2817                         ieee80211_sta_connection_lost(sdata, bssid,
2818                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2819                 } else if (ifmgd->probe_send_count < max_tries) {
2820 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2821                         wiphy_debug(local->hw.wiphy,
2822                                     "%s: No probe response from AP %pM"
2823                                     " after %dms, try %d/%i\n",
2824                                     sdata->name,
2825                                     bssid, probe_wait_ms,
2826                                     ifmgd->probe_send_count, max_tries);
2827 #endif
2828                         ieee80211_mgd_probe_ap_send(sdata);
2829                 } else {
2830                         /*
2831                          * We actually lost the connection ... or did we?
2832                          * Let's make sure!
2833                          */
2834                         wiphy_debug(local->hw.wiphy,
2835                                     "%s: No probe response from AP %pM"
2836                                     " after %dms, disconnecting.\n",
2837                                     sdata->name,
2838                                     bssid, probe_wait_ms);
2839
2840                         ieee80211_sta_connection_lost(sdata, bssid,
2841                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2842                 }
2843         }
2844
2845         mutex_unlock(&ifmgd->mtx);
2846
2847         mutex_lock(&local->mtx);
2848         ieee80211_recalc_idle(local);
2849         mutex_unlock(&local->mtx);
2850 }
2851
2852 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2853 {
2854         struct ieee80211_sub_if_data *sdata =
2855                 (struct ieee80211_sub_if_data *) data;
2856         struct ieee80211_local *local = sdata->local;
2857
2858         if (local->quiescing)
2859                 return;
2860
2861         ieee80211_queue_work(&sdata->local->hw,
2862                              &sdata->u.mgd.beacon_connection_loss_work);
2863 }
2864
2865 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2866 {
2867         struct ieee80211_sub_if_data *sdata =
2868                 (struct ieee80211_sub_if_data *) data;
2869         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2870         struct ieee80211_local *local = sdata->local;
2871
2872         if (local->quiescing)
2873                 return;
2874
2875         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2876 }
2877
2878 static void ieee80211_sta_monitor_work(struct work_struct *work)
2879 {
2880         struct ieee80211_sub_if_data *sdata =
2881                 container_of(work, struct ieee80211_sub_if_data,
2882                              u.mgd.monitor_work);
2883
2884         ieee80211_mgd_probe_ap(sdata, false);
2885 }
2886
2887 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2888 {
2889         u32 flags;
2890
2891         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2892                 __ieee80211_stop_poll(sdata);
2893
2894                 /* let's probe the connection once */
2895                 flags = sdata->local->hw.flags;
2896                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2897                         ieee80211_queue_work(&sdata->local->hw,
2898                                              &sdata->u.mgd.monitor_work);
2899                 /* and do all the other regular work too */
2900                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2901         }
2902 }
2903
2904 #ifdef CONFIG_PM
2905 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2906 {
2907         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2908
2909         /*
2910          * we need to use atomic bitops for the running bits
2911          * only because both timers might fire at the same
2912          * time -- the code here is properly synchronised.
2913          */
2914
2915         cancel_work_sync(&ifmgd->request_smps_work);
2916
2917         cancel_work_sync(&ifmgd->monitor_work);
2918         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2919         if (del_timer_sync(&ifmgd->timer))
2920                 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2921
2922         cancel_work_sync(&ifmgd->chswitch_work);
2923         if (del_timer_sync(&ifmgd->chswitch_timer))
2924                 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2925
2926         /* these will just be re-established on connection */
2927         del_timer_sync(&ifmgd->conn_mon_timer);
2928         del_timer_sync(&ifmgd->bcn_mon_timer);
2929 }
2930
2931 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2932 {
2933         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2934
2935         if (!ifmgd->associated)
2936                 return;
2937
2938         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2939                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2940                 mutex_lock(&ifmgd->mtx);
2941                 if (ifmgd->associated) {
2942 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2943                         wiphy_debug(sdata->local->hw.wiphy,
2944                                     "%s: driver requested disconnect after resume.\n",
2945                                     sdata->name);
2946 #endif
2947                         ieee80211_sta_connection_lost(sdata,
2948                                 ifmgd->associated->bssid,
2949                                 WLAN_REASON_UNSPECIFIED);
2950                         mutex_unlock(&ifmgd->mtx);
2951                         return;
2952                 }
2953                 mutex_unlock(&ifmgd->mtx);
2954         }
2955
2956         if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2957                 add_timer(&ifmgd->timer);
2958         if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2959                 add_timer(&ifmgd->chswitch_timer);
2960         ieee80211_sta_reset_beacon_monitor(sdata);
2961
2962         mutex_lock(&sdata->local->mtx);
2963         ieee80211_restart_sta_timer(sdata);
2964         mutex_unlock(&sdata->local->mtx);
2965 }
2966 #endif
2967
2968 /* interface setup */
2969 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2970 {
2971         struct ieee80211_if_managed *ifmgd;
2972
2973         ifmgd = &sdata->u.mgd;
2974         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2975         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2976         INIT_WORK(&ifmgd->beacon_connection_loss_work,
2977                   ieee80211_beacon_connection_loss_work);
2978         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2979         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2980                     (unsigned long) sdata);
2981         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2982                     (unsigned long) sdata);
2983         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2984                     (unsigned long) sdata);
2985         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2986                     (unsigned long) sdata);
2987
2988         ifmgd->flags = 0;
2989         ifmgd->powersave = sdata->wdev.ps;
2990         ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2991         ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
2992
2993         mutex_init(&ifmgd->mtx);
2994
2995         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2996                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2997         else
2998                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2999 }
3000
3001 /* scan finished notification */
3002 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3003 {
3004         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3005
3006         /* Restart STA timers */
3007         rcu_read_lock();
3008         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3009                 ieee80211_restart_sta_timer(sdata);
3010         rcu_read_unlock();
3011 }
3012
3013 int ieee80211_max_network_latency(struct notifier_block *nb,
3014                                   unsigned long data, void *dummy)
3015 {
3016         s32 latency_usec = (s32) data;
3017         struct ieee80211_local *local =
3018                 container_of(nb, struct ieee80211_local,
3019                              network_latency_notifier);
3020
3021         mutex_lock(&local->iflist_mtx);
3022         ieee80211_recalc_ps(local, latency_usec);
3023         mutex_unlock(&local->iflist_mtx);
3024
3025         return 0;
3026 }
3027
3028 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3029                                      struct cfg80211_bss *cbss, bool assoc)
3030 {
3031         struct ieee80211_local *local = sdata->local;
3032         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3033         struct ieee80211_bss *bss = (void *)cbss->priv;
3034         struct sta_info *sta;
3035         bool have_sta = false;
3036         int err;
3037         int ht_cfreq;
3038         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3039         const u8 *ht_oper_ie;
3040         const struct ieee80211_ht_operation *ht_oper = NULL;
3041         struct ieee80211_supported_band *sband;
3042
3043         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3044                 return -EINVAL;
3045
3046         if (assoc) {
3047                 rcu_read_lock();
3048                 have_sta = sta_info_get(sdata, cbss->bssid);
3049                 rcu_read_unlock();
3050         }
3051
3052         if (!have_sta) {
3053                 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3054                 if (!sta)
3055                         return -ENOMEM;
3056         }
3057
3058         mutex_lock(&local->mtx);
3059         ieee80211_recalc_idle(sdata->local);
3060         mutex_unlock(&local->mtx);
3061
3062         /* switch to the right channel */
3063         sband = local->hw.wiphy->bands[cbss->channel->band];
3064
3065         ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3066
3067         if (sband->ht_cap.ht_supported) {
3068                 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3069                                               cbss->information_elements,
3070                                               cbss->len_information_elements);
3071                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3072                         ht_oper = (void *)(ht_oper_ie + 2);
3073         }
3074
3075         if (ht_oper) {
3076                 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3077                                                           cbss->channel->band);
3078                 /* check that channel matches the right operating channel */
3079                 if (cbss->channel->center_freq != ht_cfreq) {
3080                         /*
3081                          * It's possible that some APs are confused here;
3082                          * Netgear WNDR3700 sometimes reports 4 higher than
3083                          * the actual channel in association responses, but
3084                          * since we look at probe response/beacon data here
3085                          * it should be OK.
3086                          */
3087                         printk(KERN_DEBUG
3088                                "%s: Wrong control channel: center-freq: %d"
3089                                " ht-cfreq: %d ht->primary_chan: %d"
3090                                " band: %d. Disabling HT.\n",
3091                                sdata->name, cbss->channel->center_freq,
3092                                ht_cfreq, ht_oper->primary_chan,
3093                                cbss->channel->band);
3094                         ht_oper = NULL;
3095                 }
3096         }
3097
3098         if (ht_oper) {
3099                 channel_type = NL80211_CHAN_HT20;
3100
3101                 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3102                         switch (ht_oper->ht_param &
3103                                         IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3104                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3105                                 channel_type = NL80211_CHAN_HT40PLUS;
3106                                 break;
3107                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3108                                 channel_type = NL80211_CHAN_HT40MINUS;
3109                                 break;
3110                         }
3111                 }
3112         }
3113
3114         if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3115                 /* can only fail due to HT40+/- mismatch */
3116                 channel_type = NL80211_CHAN_HT20;
3117                 printk(KERN_DEBUG
3118                        "%s: disabling 40 MHz due to multi-vif mismatch\n",
3119                        sdata->name);
3120                 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3121                 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3122                                                     channel_type));
3123         }
3124
3125         local->oper_channel = cbss->channel;
3126         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3127
3128         if (!have_sta) {
3129                 u32 rates = 0, basic_rates = 0;
3130                 bool have_higher_than_11mbit;
3131                 int min_rate = INT_MAX, min_rate_index = -1;
3132
3133                 ieee80211_get_rates(sband, bss->supp_rates,
3134                                     bss->supp_rates_len,
3135                                     &rates, &basic_rates,
3136                                     &have_higher_than_11mbit,
3137                                     &min_rate, &min_rate_index);
3138
3139                 /*
3140                  * This used to be a workaround for basic rates missing
3141                  * in the association response frame. Now that we no
3142                  * longer use the basic rates from there, it probably
3143                  * doesn't happen any more, but keep the workaround so
3144                  * in case some *other* APs are buggy in different ways
3145                  * we can connect -- with a warning.
3146                  */
3147                 if (!basic_rates && min_rate_index >= 0) {
3148                         printk(KERN_DEBUG
3149                                "%s: No basic rates, using min rate instead.\n",
3150                                sdata->name);
3151                         basic_rates = BIT(min_rate_index);
3152                 }
3153
3154                 sta->sta.supp_rates[cbss->channel->band] = rates;
3155                 sdata->vif.bss_conf.basic_rates = basic_rates;
3156
3157                 /* cf. IEEE 802.11 9.2.12 */
3158                 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3159                     have_higher_than_11mbit)
3160                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3161                 else
3162                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3163
3164                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3165
3166                 /* tell driver about BSSID and basic rates */
3167                 ieee80211_bss_info_change_notify(sdata,
3168                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
3169
3170                 if (assoc)
3171                         sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3172
3173                 err = sta_info_insert(sta);
3174                 sta = NULL;
3175                 if (err) {
3176                         printk(KERN_DEBUG
3177                                "%s: failed to insert STA entry for the AP (error %d)\n",
3178                                sdata->name, err);
3179                         return err;
3180                 }
3181         } else
3182                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3183
3184         return 0;
3185 }
3186
3187 /* config hooks */
3188 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3189                        struct cfg80211_auth_request *req)
3190 {
3191         struct ieee80211_local *local = sdata->local;
3192         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3193         struct ieee80211_mgd_auth_data *auth_data;
3194         u16 auth_alg;
3195         int err;
3196
3197         /* prepare auth data structure */
3198
3199         switch (req->auth_type) {
3200         case NL80211_AUTHTYPE_OPEN_SYSTEM:
3201                 auth_alg = WLAN_AUTH_OPEN;
3202                 break;
3203         case NL80211_AUTHTYPE_SHARED_KEY:
3204                 if (IS_ERR(local->wep_tx_tfm))
3205                         return -EOPNOTSUPP;
3206                 auth_alg = WLAN_AUTH_SHARED_KEY;
3207                 break;
3208         case NL80211_AUTHTYPE_FT:
3209                 auth_alg = WLAN_AUTH_FT;
3210                 break;
3211         case NL80211_AUTHTYPE_NETWORK_EAP:
3212                 auth_alg = WLAN_AUTH_LEAP;
3213                 break;
3214         default:
3215                 return -EOPNOTSUPP;
3216         }
3217
3218         auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3219         if (!auth_data)
3220                 return -ENOMEM;
3221
3222         auth_data->bss = req->bss;
3223
3224         if (req->ie && req->ie_len) {
3225                 memcpy(auth_data->ie, req->ie, req->ie_len);
3226                 auth_data->ie_len = req->ie_len;
3227         }
3228
3229         if (req->key && req->key_len) {
3230                 auth_data->key_len = req->key_len;
3231                 auth_data->key_idx = req->key_idx;
3232                 memcpy(auth_data->key, req->key, req->key_len);
3233         }
3234
3235         auth_data->algorithm = auth_alg;
3236
3237         /* try to authenticate/probe */
3238
3239         mutex_lock(&ifmgd->mtx);
3240
3241         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3242             ifmgd->assoc_data) {
3243                 err = -EBUSY;
3244                 goto err_free;
3245         }
3246
3247         if (ifmgd->auth_data)
3248                 ieee80211_destroy_auth_data(sdata, false);
3249
3250         /* prep auth_data so we don't go into idle on disassoc */
3251         ifmgd->auth_data = auth_data;
3252
3253         if (ifmgd->associated)
3254                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3255
3256         printk(KERN_DEBUG "%s: authenticate with %pM\n",
3257                sdata->name, req->bss->bssid);
3258
3259         err = ieee80211_prep_connection(sdata, req->bss, false);
3260         if (err)
3261                 goto err_clear;
3262
3263         err = ieee80211_probe_auth(sdata);
3264         if (err) {
3265                 sta_info_destroy_addr(sdata, req->bss->bssid);
3266                 goto err_clear;
3267         }
3268
3269         /* hold our own reference */
3270         cfg80211_ref_bss(auth_data->bss);
3271         err = 0;
3272         goto out_unlock;
3273
3274  err_clear:
3275         ifmgd->auth_data = NULL;
3276  err_free:
3277         kfree(auth_data);
3278  out_unlock:
3279         mutex_unlock(&ifmgd->mtx);
3280
3281         return err;
3282 }
3283
3284 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3285                         struct cfg80211_assoc_request *req)
3286 {
3287         struct ieee80211_local *local = sdata->local;
3288         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3289         struct ieee80211_bss *bss = (void *)req->bss->priv;
3290         struct ieee80211_mgd_assoc_data *assoc_data;
3291         struct ieee80211_supported_band *sband;
3292         const u8 *ssidie;
3293         int i, err;
3294
3295         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3296         if (!ssidie)
3297                 return -EINVAL;
3298
3299         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3300         if (!assoc_data)
3301                 return -ENOMEM;
3302
3303         mutex_lock(&ifmgd->mtx);
3304
3305         if (ifmgd->associated)
3306                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3307
3308         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3309                 err = -EBUSY;
3310                 goto err_free;
3311         }
3312
3313         if (ifmgd->assoc_data) {
3314                 err = -EBUSY;
3315                 goto err_free;
3316         }
3317
3318         if (ifmgd->auth_data) {
3319                 bool match;
3320
3321                 /* keep sta info, bssid if matching */
3322                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3323                 ieee80211_destroy_auth_data(sdata, match);
3324         }
3325
3326         /* prepare assoc data */
3327
3328         ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
3329         ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3330
3331         ifmgd->beacon_crc_valid = false;
3332
3333         /*
3334          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3335          * We still associate in non-HT mode (11a/b/g) if any one of these
3336          * ciphers is configured as pairwise.
3337          * We can set this to true for non-11n hardware, that'll be checked
3338          * separately along with the peer capabilities.
3339          */
3340         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3341                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3342                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3343                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3344                         ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3345
3346         if (req->flags & ASSOC_REQ_DISABLE_HT)
3347                 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3348
3349         /* Also disable HT if we don't support it or the AP doesn't use WMM */
3350         sband = local->hw.wiphy->bands[req->bss->channel->band];
3351         if (!sband->ht_cap.ht_supported ||
3352             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
3353                 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3354
3355         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3356         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3357                sizeof(ifmgd->ht_capa_mask));
3358
3359         if (req->ie && req->ie_len) {
3360                 memcpy(assoc_data->ie, req->ie, req->ie_len);
3361                 assoc_data->ie_len = req->ie_len;
3362         }
3363
3364         assoc_data->bss = req->bss;
3365
3366         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3367                 if (ifmgd->powersave)
3368                         ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3369                 else
3370                         ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3371         } else
3372                 ifmgd->ap_smps = ifmgd->req_smps;
3373
3374         assoc_data->capability = req->bss->capability;
3375         assoc_data->wmm = bss->wmm_used &&
3376                           (local->hw.queues >= IEEE80211_NUM_ACS);
3377         assoc_data->supp_rates = bss->supp_rates;
3378         assoc_data->supp_rates_len = bss->supp_rates_len;
3379         assoc_data->ht_operation_ie =
3380                 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3381
3382         if (bss->wmm_used && bss->uapsd_supported &&
3383             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3384                 assoc_data->uapsd = true;
3385                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3386         } else {
3387                 assoc_data->uapsd = false;
3388                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3389         }
3390
3391         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3392         assoc_data->ssid_len = ssidie[1];
3393
3394         if (req->prev_bssid)
3395                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3396
3397         if (req->use_mfp) {
3398                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3399                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3400         } else {
3401                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3402                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3403         }
3404
3405         if (req->crypto.control_port)
3406                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3407         else
3408                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3409
3410         sdata->control_port_protocol = req->crypto.control_port_ethertype;
3411         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3412
3413         /* kick off associate process */
3414
3415         ifmgd->assoc_data = assoc_data;
3416
3417         err = ieee80211_prep_connection(sdata, req->bss, true);
3418         if (err)
3419                 goto err_clear;
3420
3421         if (!bss->dtim_period &&
3422             sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3423                 /*
3424                  * Wait up to one beacon interval ...
3425                  * should this be more if we miss one?
3426                  */
3427                 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3428                        sdata->name, ifmgd->bssid);
3429                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
3430         } else {
3431                 assoc_data->have_beacon = true;
3432                 assoc_data->sent_assoc = false;
3433                 assoc_data->timeout = jiffies;
3434         }
3435         run_again(ifmgd, assoc_data->timeout);
3436
3437         if (bss->corrupt_data) {
3438                 char *corrupt_type = "data";
3439                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3440                         if (bss->corrupt_data &
3441                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
3442                                 corrupt_type = "beacon and probe response";
3443                         else
3444                                 corrupt_type = "beacon";
3445                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3446                         corrupt_type = "probe response";
3447                 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3448                        sdata->name, corrupt_type);
3449         }
3450
3451         err = 0;
3452         goto out;
3453  err_clear:
3454         ifmgd->assoc_data = NULL;
3455  err_free:
3456         kfree(assoc_data);
3457  out:
3458         mutex_unlock(&ifmgd->mtx);
3459
3460         return err;
3461 }
3462
3463 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3464                          struct cfg80211_deauth_request *req)
3465 {
3466         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3467         u8 frame_buf[DEAUTH_DISASSOC_LEN];
3468
3469         mutex_lock(&ifmgd->mtx);
3470
3471         if (ifmgd->auth_data) {
3472                 ieee80211_destroy_auth_data(sdata, false);
3473                 mutex_unlock(&ifmgd->mtx);
3474                 return 0;
3475         }
3476
3477         printk(KERN_DEBUG
3478                "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3479                sdata->name, req->bssid, req->reason_code);
3480
3481         if (ifmgd->associated &&
3482             ether_addr_equal(ifmgd->associated->bssid, req->bssid))
3483                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3484                                        req->reason_code, true, frame_buf);
3485         else
3486                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3487                                                IEEE80211_STYPE_DEAUTH,
3488                                                req->reason_code, true,
3489                                                frame_buf);
3490         mutex_unlock(&ifmgd->mtx);
3491
3492         __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3493
3494         mutex_lock(&sdata->local->mtx);
3495         ieee80211_recalc_idle(sdata->local);
3496         mutex_unlock(&sdata->local->mtx);
3497
3498         return 0;
3499 }
3500
3501 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
3502                            struct cfg80211_disassoc_request *req)
3503 {
3504         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3505         u8 bssid[ETH_ALEN];
3506         u8 frame_buf[DEAUTH_DISASSOC_LEN];
3507
3508         mutex_lock(&ifmgd->mtx);
3509
3510         /*
3511          * cfg80211 should catch this ... but it's racy since
3512          * we can receive a disassoc frame, process it, hand it
3513          * to cfg80211 while that's in a locked section already
3514          * trying to tell us that the user wants to disconnect.
3515          */
3516         if (ifmgd->associated != req->bss) {
3517                 mutex_unlock(&ifmgd->mtx);
3518                 return -ENOLINK;
3519         }
3520
3521         printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
3522                sdata->name, req->bss->bssid, req->reason_code);
3523
3524         memcpy(bssid, req->bss->bssid, ETH_ALEN);
3525         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3526                                req->reason_code, !req->local_state_change,
3527                                frame_buf);
3528         mutex_unlock(&ifmgd->mtx);
3529
3530         __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
3531
3532         mutex_lock(&sdata->local->mtx);
3533         ieee80211_recalc_idle(sdata->local);
3534         mutex_unlock(&sdata->local->mtx);
3535
3536         return 0;
3537 }
3538
3539 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
3540 {
3541         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3542
3543         mutex_lock(&ifmgd->mtx);
3544         if (ifmgd->assoc_data)
3545                 ieee80211_destroy_assoc_data(sdata, false);
3546         if (ifmgd->auth_data)
3547                 ieee80211_destroy_auth_data(sdata, false);
3548         del_timer_sync(&ifmgd->timer);
3549         mutex_unlock(&ifmgd->mtx);
3550 }
3551
3552 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3553                                enum nl80211_cqm_rssi_threshold_event rssi_event,
3554                                gfp_t gfp)
3555 {
3556         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3557
3558         trace_api_cqm_rssi_notify(sdata, rssi_event);
3559
3560         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3561 }
3562 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
3563
3564 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3565 {
3566         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3567         return sdata->dev->operstate;
3568 }
3569 EXPORT_SYMBOL(ieee80211_get_operstate);