Pileus Git - ~andy/linux/blob - net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/rtnetlink.h>
  20 #include <linux/pm_qos_params.h>
  21 #include <linux/crc32.h>
  22 #include <net/mac80211.h>
  23 #include <asm/unaligned.h>
  24
  25 #include "ieee80211_i.h"
  26 #include "driver-ops.h"
  27 #include "rate.h"
  28 #include "led.h"
  29
  30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
  31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  32 #define IEEE80211_AUTH_MAX_TRIES 3
  33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  34 #define IEEE80211_ASSOC_MAX_TRIES 3
  35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  36 #define IEEE80211_PROBE_WAIT (HZ / 5)
  37 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
  38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  39
  40 #define TMR_RUNNING_TIMER       0
  41 #define TMR_RUNNING_CHANSW      1
  42
  43 /* utils */
  44 static int ecw2cw(int ecw)
  45 {
  46         return (1 << ecw) - 1;
  47 }
  48
  49 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
  50 {
  51         u8 *end, *pos;
  52
  53         pos = bss->cbss.information_elements;
  54         if (pos == NULL)
  55                 return NULL;
  56         end = pos + bss->cbss.len_information_elements;
  57
  58         while (pos + 1 < end) {
  59                 if (pos + 2 + pos[1] > end)
  60                         break;
  61                 if (pos[0] == ie)
  62                         return pos;
  63                 pos += 2 + pos[1];
  64         }
  65
  66         return NULL;
  67 }
  68
  69 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
  70                                       struct ieee80211_supported_band *sband,
  71                                       u32 *rates)
  72 {
  73         int i, j, count;
  74         *rates = 0;
  75         count = 0;
  76         for (i = 0; i < bss->supp_rates_len; i++) {
  77                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
  78
  79                 for (j = 0; j < sband->n_bitrates; j++)
  80                         if (sband->bitrates[j].bitrate == rate) {
  81                                 *rates |= BIT(j);
  82                                 count++;
  83                                 break;
  84                         }
  85         }
  86
  87         return count;
  88 }
  89
  90 /*
  91  * ieee80211_enable_ht should be called only after the operating band
  92  * has been determined as ht configuration depends on the hw's
  93  * HT abilities for a specific band.
  94  */
  95 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
  96                                struct ieee80211_ht_info *hti,
  97                                u16 ap_ht_cap_flags)
  98 {
  99         struct ieee80211_local *local = sdata->local;
 100         struct ieee80211_supported_band *sband;
 101         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 102         struct sta_info *sta;
 103         u32 changed = 0;
 104         u16 ht_opmode;
 105         bool enable_ht = true, ht_changed;
 106         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 107
 108         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 109
 110         /* HT is not supported */
 111         if (!sband->ht_cap.ht_supported)
 112                 enable_ht = false;
 113
 114         /* check that channel matches the right operating channel */
 115         if (local->hw.conf.channel->center_freq !=
 116             ieee80211_channel_to_frequency(hti->control_chan))
 117                 enable_ht = false;
 118
 119         if (enable_ht) {
 120                 channel_type = NL80211_CHAN_HT20;
 121
 122                 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
 123                     (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
 124                     (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
 125                         switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 126                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 127                                 if (!(local->hw.conf.channel->flags &
 128                                     IEEE80211_CHAN_NO_HT40PLUS))
 129                                         channel_type = NL80211_CHAN_HT40PLUS;
 130                                 break;
 131                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 132                                 if (!(local->hw.conf.channel->flags &
 133                                     IEEE80211_CHAN_NO_HT40MINUS))
 134                                         channel_type = NL80211_CHAN_HT40MINUS;
 135                                 break;
 136                         }
 137                 }
 138         }
 139
 140         ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
 141                      channel_type != local->hw.conf.channel_type;
 142
 143         local->oper_channel_type = channel_type;
 144
 145         if (ht_changed) {
 146                 /* channel_type change automatically detected */
 147                 ieee80211_hw_config(local, 0);
 148
 149                 rcu_read_lock();
 150
 151                 sta = sta_info_get(local, ifmgd->bssid);
 152                 if (sta)
 153                         rate_control_rate_update(local, sband, sta,
 154                                                  IEEE80211_RC_HT_CHANGED);
 155
 156                 rcu_read_unlock();
 157         }
 158
 159         /* disable HT */
 160         if (!enable_ht)
 161                 return 0;
 162
 163         ht_opmode = le16_to_cpu(hti->operation_mode);
 164
 165         /* if bss configuration changed store the new one */
 166         if (!sdata->ht_opmode_valid ||
 167             sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 168                 changed |= BSS_CHANGED_HT;
 169                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 170                 sdata->ht_opmode_valid = true;
 171         }
 172
 173         return changed;
 174 }
 175
 176 /* frame sending functions */
 177
 178 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 179 {
 180         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 181         struct ieee80211_local *local = sdata->local;
 182         struct sk_buff *skb;
 183         struct ieee80211_mgmt *mgmt;
 184         u8 *pos, *ies, *ht_ie;
 185         int i, len, count, rates_len, supp_rates_len;
 186         u16 capab;
 187         struct ieee80211_bss *bss;
 188         int wmm = 0;
 189         struct ieee80211_supported_band *sband;
 190         u32 rates = 0;
 191
 192         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 193                             sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
 194                             ifmgd->ssid_len);
 195         if (!skb) {
 196                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 197                        "frame\n", sdata->dev->name);
 198                 return;
 199         }
 200         skb_reserve(skb, local->hw.extra_tx_headroom);
 201
 202         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 203
 204         capab = ifmgd->capab;
 205
 206         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 207                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 208                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 209                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 210                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 211         }
 212
 213         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 214                                    local->hw.conf.channel->center_freq,
 215                                    ifmgd->ssid, ifmgd->ssid_len);
 216         if (bss) {
 217                 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
 218                         capab |= WLAN_CAPABILITY_PRIVACY;
 219                 if (bss->wmm_used)
 220                         wmm = 1;
 221
 222                 /* get all rates supported by the device and the AP as
 223                  * some APs don't like getting a superset of their rates
 224                  * in the association request (e.g. D-Link DAP 1353 in
 225                  * b-only mode) */
 226                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 227
 228                 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 229                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 230                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 231
 232                 ieee80211_rx_bss_put(local, bss);
 233         } else {
 234                 rates = ~0;
 235                 rates_len = sband->n_bitrates;
 236         }
 237
 238         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 239         memset(mgmt, 0, 24);
 240         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
 241         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 242         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
 243
 244         if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
 245                 skb_put(skb, 10);
 246                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 247                                                   IEEE80211_STYPE_REASSOC_REQ);
 248                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 249                 mgmt->u.reassoc_req.listen_interval =
 250                                 cpu_to_le16(local->hw.conf.listen_interval);
 251                 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
 252                        ETH_ALEN);
 253         } else {
 254                 skb_put(skb, 4);
 255                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 256                                                   IEEE80211_STYPE_ASSOC_REQ);
 257                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 258                 mgmt->u.assoc_req.listen_interval =
 259                                 cpu_to_le16(local->hw.conf.listen_interval);
 260         }
 261
 262         /* SSID */
 263         ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
 264         *pos++ = WLAN_EID_SSID;
 265         *pos++ = ifmgd->ssid_len;
 266         memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
 267
 268         /* add all rates which were marked to be used above */
 269         supp_rates_len = rates_len;
 270         if (supp_rates_len > 8)
 271                 supp_rates_len = 8;
 272
 273         len = sband->n_bitrates;
 274         pos = skb_put(skb, supp_rates_len + 2);
 275         *pos++ = WLAN_EID_SUPP_RATES;
 276         *pos++ = supp_rates_len;
 277
 278         count = 0;
 279         for (i = 0; i < sband->n_bitrates; i++) {
 280                 if (BIT(i) & rates) {
 281                         int rate = sband->bitrates[i].bitrate;
 282                         *pos++ = (u8) (rate / 5);
 283                         if (++count == 8)
 284                                 break;
 285                 }
 286         }
 287
 288         if (rates_len > count) {
 289                 pos = skb_put(skb, rates_len - count + 2);
 290                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 291                 *pos++ = rates_len - count;
 292
 293                 for (i++; i < sband->n_bitrates; i++) {
 294                         if (BIT(i) & rates) {
 295                                 int rate = sband->bitrates[i].bitrate;
 296                                 *pos++ = (u8) (rate / 5);
 297                         }
 298                 }
 299         }
 300
 301         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 302                 /* 1. power capabilities */
 303                 pos = skb_put(skb, 4);
 304                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 305                 *pos++ = 2;
 306                 *pos++ = 0; /* min tx power */
 307                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 308
 309                 /* 2. supported channels */
 310                 /* TODO: get this in reg domain format */
 311                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 312                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 313                 *pos++ = 2 * sband->n_channels;
 314                 for (i = 0; i < sband->n_channels; i++) {
 315                         *pos++ = ieee80211_frequency_to_channel(
 316                                         sband->channels[i].center_freq);
 317                         *pos++ = 1; /* one channel in the subband*/
 318                 }
 319         }
 320
 321         if (ifmgd->extra_ie) {
 322                 pos = skb_put(skb, ifmgd->extra_ie_len);
 323                 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
 324         }
 325
 326         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
 327                 pos = skb_put(skb, 9);
 328                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 329                 *pos++ = 7; /* len */
 330                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 331                 *pos++ = 0x50;
 332                 *pos++ = 0xf2;
 333                 *pos++ = 2; /* WME */
 334                 *pos++ = 0; /* WME info */
 335                 *pos++ = 1; /* WME ver */
 336                 *pos++ = 0;
 337         }
 338
 339         /* wmm support is a must to HT */
 340         /*
 341          * IEEE802.11n does not allow TKIP/WEP as pairwise
 342          * ciphers in HT mode. We still associate in non-ht
 343          * mode (11a/b/g) if any one of these ciphers is
 344          * configured as pairwise.
 345          */
 346         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
 347             sband->ht_cap.ht_supported &&
 348             (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
 349             ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
 350             (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
 351                 struct ieee80211_ht_info *ht_info =
 352                         (struct ieee80211_ht_info *)(ht_ie + 2);
 353                 u16 cap = sband->ht_cap.cap;
 354                 __le16 tmp;
 355                 u32 flags = local->hw.conf.channel->flags;
 356
 357                 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 358                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 359                         if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 360                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 361                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 362                         }
 363                         break;
 364                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 365                         if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 366                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 367                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 368                         }
 369                         break;
 370                 }
 371
 372                 tmp = cpu_to_le16(cap);
 373                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 374                 *pos++ = WLAN_EID_HT_CAPABILITY;
 375                 *pos++ = sizeof(struct ieee80211_ht_cap);
 376                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 377                 memcpy(pos, &tmp, sizeof(u16));
 378                 pos += sizeof(u16);
 379                 /* TODO: needs a define here for << 2 */
 380                 *pos++ = sband->ht_cap.ampdu_factor |
 381                          (sband->ht_cap.ampdu_density << 2);
 382                 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
 383         }
 384
 385         kfree(ifmgd->assocreq_ies);
 386         ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
 387         ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
 388         if (ifmgd->assocreq_ies)
 389                 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
 390
 391         ieee80211_tx_skb(sdata, skb, 0);
 392 }
 393
 394
 395 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
 396                                            u16 stype, u16 reason)
 397 {
 398         struct ieee80211_local *local = sdata->local;
 399         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 400         struct sk_buff *skb;
 401         struct ieee80211_mgmt *mgmt;
 402
 403         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 404         if (!skb) {
 405                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
 406                        "deauth/disassoc frame\n", sdata->dev->name);
 407                 return;
 408         }
 409         skb_reserve(skb, local->hw.extra_tx_headroom);
 410
 411         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 412         memset(mgmt, 0, 24);
 413         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
 414         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 415         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
 416         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
 417         skb_put(skb, 2);
 418         /* u.deauth.reason_code == u.disassoc.reason_code */
 419         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 420
 421         if (stype == IEEE80211_STYPE_DEAUTH)
 422                 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
 423         else
 424                 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
 425         ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
 426 }
 427
 428 void ieee80211_send_pspoll(struct ieee80211_local *local,
 429                            struct ieee80211_sub_if_data *sdata)
 430 {
 431         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 432         struct ieee80211_pspoll *pspoll;
 433         struct sk_buff *skb;
 434         u16 fc;
 435
 436         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
 437         if (!skb) {
 438                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
 439                        "pspoll frame\n", sdata->dev->name);
 440                 return;
 441         }
 442         skb_reserve(skb, local->hw.extra_tx_headroom);
 443
 444         pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
 445         memset(pspoll, 0, sizeof(*pspoll));
 446         fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
 447         pspoll->frame_control = cpu_to_le16(fc);
 448         pspoll->aid = cpu_to_le16(ifmgd->aid);
 449
 450         /* aid in PS-Poll has its two MSBs each set to 1 */
 451         pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
 452
 453         memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
 454         memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
 455
 456         ieee80211_tx_skb(sdata, skb, 0);
 457 }
 458
 459 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 460                              struct ieee80211_sub_if_data *sdata,
 461                              int powersave)
 462 {
 463         struct sk_buff *skb;
 464         struct ieee80211_hdr *nullfunc;
 465         __le16 fc;
 466
 467         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 468                 return;
 469
 470         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
 471         if (!skb) {
 472                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
 473                        "frame\n", sdata->dev->name);
 474                 return;
 475         }
 476         skb_reserve(skb, local->hw.extra_tx_headroom);
 477
 478         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
 479         memset(nullfunc, 0, 24);
 480         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 481                          IEEE80211_FCTL_TODS);
 482         if (powersave)
 483                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
 484         nullfunc->frame_control = fc;
 485         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 486         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
 487         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 488
 489         ieee80211_tx_skb(sdata, skb, 0);
 490 }
 491
 492 /* spectrum management related things */
 493 static void ieee80211_chswitch_work(struct work_struct *work)
 494 {
 495         struct ieee80211_sub_if_data *sdata =
 496                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 497         struct ieee80211_bss *bss;
 498         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 499
 500         if (!netif_running(sdata->dev))
 501                 return;
 502
 503         bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
 504                                    sdata->local->hw.conf.channel->center_freq,
 505                                    ifmgd->ssid, ifmgd->ssid_len);
 506         if (!bss)
 507                 goto exit;
 508
 509         sdata->local->oper_channel = sdata->local->csa_channel;
 510         /* XXX: shouldn't really modify cfg80211-owned data! */
 511         if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
 512                 bss->cbss.channel = sdata->local->oper_channel;
 513
 514         ieee80211_rx_bss_put(sdata->local, bss);
 515 exit:
 516         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 517         ieee80211_wake_queues_by_reason(&sdata->local->hw,
 518                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 519 }
 520
 521 static void ieee80211_chswitch_timer(unsigned long data)
 522 {
 523         struct ieee80211_sub_if_data *sdata =
 524                 (struct ieee80211_sub_if_data *) data;
 525         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 526
 527         if (sdata->local->quiescing) {
 528                 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
 529                 return;
 530         }
 531
 532         queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
 533 }
 534
 535 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 536                                       struct ieee80211_channel_sw_ie *sw_elem,
 537                                       struct ieee80211_bss *bss)
 538 {
 539         struct ieee80211_channel *new_ch;
 540         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 541         int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
 542
 543         if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
 544                 return;
 545
 546         if (sdata->local->sw_scanning || sdata->local->hw_scanning)
 547                 return;
 548
 549         /* Disregard subsequent beacons if we are already running a timer
 550            processing a CSA */
 551
 552         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
 553                 return;
 554
 555         new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
 556         if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
 557                 return;
 558
 559         sdata->local->csa_channel = new_ch;
 560
 561         if (sw_elem->count <= 1) {
 562                 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
 563         } else {
 564                 ieee80211_stop_queues_by_reason(&sdata->local->hw,
 565                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 566                 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
 567                 mod_timer(&ifmgd->chswitch_timer,
 568                           jiffies +
 569                           msecs_to_jiffies(sw_elem->count *
 570                                            bss->cbss.beacon_interval));
 571         }
 572 }
 573
 574 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
 575                                         u16 capab_info, u8 *pwr_constr_elem,
 576                                         u8 pwr_constr_elem_len)
 577 {
 578         struct ieee80211_conf *conf = &sdata->local->hw.conf;
 579
 580         if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
 581                 return;
 582
 583         /* Power constraint IE length should be 1 octet */
 584         if (pwr_constr_elem_len != 1)
 585                 return;
 586
 587         if ((*pwr_constr_elem <= conf->channel->max_power) &&
 588             (*pwr_constr_elem != sdata->local->power_constr_level)) {
 589                 sdata->local->power_constr_level = *pwr_constr_elem;
 590                 ieee80211_hw_config(sdata->local, 0);
 591         }
 592 }
 593
 594 /* powersave */
 595 static void ieee80211_enable_ps(struct ieee80211_local *local,
 596                                 struct ieee80211_sub_if_data *sdata)
 597 {
 598         struct ieee80211_conf *conf = &local->hw.conf;
 599
 600         /*
 601          * If we are scanning right now then the parameters will
 602          * take effect when scan finishes.
 603          */
 604         if (local->hw_scanning || local->sw_scanning)
 605                 return;
 606
 607         if (conf->dynamic_ps_timeout > 0 &&
 608             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
 609                 mod_timer(&local->dynamic_ps_timer, jiffies +
 610                           msecs_to_jiffies(conf->dynamic_ps_timeout));
 611         } else {
 612                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 613                         ieee80211_send_nullfunc(local, sdata, 1);
 614                 conf->flags |= IEEE80211_CONF_PS;
 615                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 616         }
 617 }
 618
 619 static void ieee80211_change_ps(struct ieee80211_local *local)
 620 {
 621         struct ieee80211_conf *conf = &local->hw.conf;
 622
 623         if (local->ps_sdata) {
 624                 ieee80211_enable_ps(local, local->ps_sdata);
 625         } else if (conf->flags & IEEE80211_CONF_PS) {
 626                 conf->flags &= ~IEEE80211_CONF_PS;
 627                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 628                 del_timer_sync(&local->dynamic_ps_timer);
 629                 cancel_work_sync(&local->dynamic_ps_enable_work);
 630         }
 631 }
 632
 633 /* need to hold RTNL or interface lock */
 634 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
 635 {
 636         struct ieee80211_sub_if_data *sdata, *found = NULL;
 637         int count = 0;
 638
 639         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
 640                 local->ps_sdata = NULL;
 641                 return;
 642         }
 643
 644         list_for_each_entry(sdata, &local->interfaces, list) {
 645                 if (!netif_running(sdata->dev))
 646                         continue;
 647                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
 648                         continue;
 649                 found = sdata;
 650                 count++;
 651         }
 652
 653         if (count == 1 && found->u.mgd.powersave &&
 654             (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED) &&
 655             !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
 656                 s32 beaconint_us;
 657
 658                 if (latency < 0)
 659                         latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
 660
 661                 beaconint_us = ieee80211_tu_to_usec(
 662                                         found->vif.bss_conf.beacon_int);
 663
 664                 if (beaconint_us > latency) {
 665                         local->ps_sdata = NULL;
 666                 } else {
 667                         u8 dtimper = found->vif.bss_conf.dtim_period;
 668                         int maxslp = 1;
 669
 670                         if (dtimper > 1)
 671                                 maxslp = min_t(int, dtimper,
 672                                                     latency / beaconint_us);
 673
 674                         local->hw.conf.max_sleep_period = maxslp;
 675                         local->ps_sdata = found;
 676                 }
 677         } else {
 678                 local->ps_sdata = NULL;
 679         }
 680
 681         ieee80211_change_ps(local);
 682 }
 683
 684 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
 685 {
 686         struct ieee80211_local *local =
 687                 container_of(work, struct ieee80211_local,
 688                              dynamic_ps_disable_work);
 689
 690         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
 691                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
 692                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 693         }
 694
 695         ieee80211_wake_queues_by_reason(&local->hw,
 696                                         IEEE80211_QUEUE_STOP_REASON_PS);
 697 }
 698
 699 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
 700 {
 701         struct ieee80211_local *local =
 702                 container_of(work, struct ieee80211_local,
 703                              dynamic_ps_enable_work);
 704         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
 705
 706         /* can only happen when PS was just disabled anyway */
 707         if (!sdata)
 708                 return;
 709
 710         if (local->hw.conf.flags & IEEE80211_CONF_PS)
 711                 return;
 712
 713         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 714                 ieee80211_send_nullfunc(local, sdata, 1);
 715
 716         local->hw.conf.flags |= IEEE80211_CONF_PS;
 717         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 718 }
 719
 720 void ieee80211_dynamic_ps_timer(unsigned long data)
 721 {
 722         struct ieee80211_local *local = (void *) data;
 723
 724         if (local->quiescing)
 725                 return;
 726
 727         queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
 728 }
 729
 730 /* MLME */
 731 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
 732                                      struct ieee80211_if_managed *ifmgd,
 733                                      u8 *wmm_param, size_t wmm_param_len)
 734 {
 735         struct ieee80211_tx_queue_params params;
 736         size_t left;
 737         int count;
 738         u8 *pos;
 739
 740         if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
 741                 return;
 742
 743         if (!wmm_param)
 744                 return;
 745
 746         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 747                 return;
 748         count = wmm_param[6] & 0x0f;
 749         if (count == ifmgd->wmm_last_param_set)
 750                 return;
 751         ifmgd->wmm_last_param_set = count;
 752
 753         pos = wmm_param + 8;
 754         left = wmm_param_len - 8;
 755
 756         memset(&params, 0, sizeof(params));
 757
 758         local->wmm_acm = 0;
 759         for (; left >= 4; left -= 4, pos += 4) {
 760                 int aci = (pos[0] >> 5) & 0x03;
 761                 int acm = (pos[0] >> 4) & 0x01;
 762                 int queue;
 763
 764                 switch (aci) {
 765                 case 1: /* AC_BK */
 766                         queue = 3;
 767                         if (acm)
 768                                 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
 769                         break;
 770                 case 2: /* AC_VI */
 771                         queue = 1;
 772                         if (acm)
 773                                 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
 774                         break;
 775                 case 3: /* AC_VO */
 776                         queue = 0;
 777                         if (acm)
 778                                 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
 779                         break;
 780                 case 0: /* AC_BE */
 781                 default:
 782                         queue = 2;
 783                         if (acm)
 784                                 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
 785                         break;
 786                 }
 787
 788                 params.aifs = pos[0] & 0x0f;
 789                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 790                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 791                 params.txop = get_unaligned_le16(pos + 2);
 792 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 793                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 794                        "cWmin=%d cWmax=%d txop=%d\n",
 795                        wiphy_name(local->hw.wiphy), queue, aci, acm,
 796                        params.aifs, params.cw_min, params.cw_max, params.txop);
 797 #endif
 798                 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
 799                         printk(KERN_DEBUG "%s: failed to set TX queue "
 800                                "parameters for queue %d\n",
 801                                wiphy_name(local->hw.wiphy), queue);
 802         }
 803 }
 804
 805 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 806                                            u16 capab, bool erp_valid, u8 erp)
 807 {
 808         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 809 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 810         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 811 #endif
 812         u32 changed = 0;
 813         bool use_protection;
 814         bool use_short_preamble;
 815         bool use_short_slot;
 816
 817         if (erp_valid) {
 818                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
 819                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
 820         } else {
 821                 use_protection = false;
 822                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
 823         }
 824
 825         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
 826
 827         if (use_protection != bss_conf->use_cts_prot) {
 828 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 829                 if (net_ratelimit()) {
 830                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
 831                                sdata->dev->name,
 832                                use_protection ? "enabled" : "disabled",
 833                                ifmgd->bssid);
 834                 }
 835 #endif
 836                 bss_conf->use_cts_prot = use_protection;
 837                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 838         }
 839
 840         if (use_short_preamble != bss_conf->use_short_preamble) {
 841 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 842                 if (net_ratelimit()) {
 843                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 844                                " (BSSID=%pM)\n",
 845                                sdata->dev->name,
 846                                use_short_preamble ? "short" : "long",
 847                                ifmgd->bssid);
 848                 }
 849 #endif
 850                 bss_conf->use_short_preamble = use_short_preamble;
 851                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 852         }
 853
 854         if (use_short_slot != bss_conf->use_short_slot) {
 855 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 856                 if (net_ratelimit()) {
 857                         printk(KERN_DEBUG "%s: switched to %s slot time"
 858                                " (BSSID=%pM)\n",
 859                                sdata->dev->name,
 860                                use_short_slot ? "short" : "long",
 861                                ifmgd->bssid);
 862                 }
 863 #endif
 864                 bss_conf->use_short_slot = use_short_slot;
 865                 changed |= BSS_CHANGED_ERP_SLOT;
 866         }
 867
 868         return changed;
 869 }
 870
 871 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
 872 {
 873         union iwreq_data wrqu;
 874
 875         memset(&wrqu, 0, sizeof(wrqu));
 876         if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
 877                 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
 878         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 879         wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
 880 }
 881
 882 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
 883 {
 884         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 885         char *buf;
 886         size_t len;
 887         int i;
 888         union iwreq_data wrqu;
 889
 890         if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
 891                 return;
 892
 893         buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
 894                                 ifmgd->assocresp_ies_len), GFP_KERNEL);
 895         if (!buf)
 896                 return;
 897
 898         len = sprintf(buf, "ASSOCINFO(");
 899         if (ifmgd->assocreq_ies) {
 900                 len += sprintf(buf + len, "ReqIEs=");
 901                 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
 902                         len += sprintf(buf + len, "%02x",
 903                                        ifmgd->assocreq_ies[i]);
 904                 }
 905         }
 906         if (ifmgd->assocresp_ies) {
 907                 if (ifmgd->assocreq_ies)
 908                         len += sprintf(buf + len, " ");
 909                 len += sprintf(buf + len, "RespIEs=");
 910                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
 911                         len += sprintf(buf + len, "%02x",
 912                                        ifmgd->assocresp_ies[i]);
 913                 }
 914         }
 915         len += sprintf(buf + len, ")");
 916
 917         if (len > IW_CUSTOM_MAX) {
 918                 len = sprintf(buf, "ASSOCRESPIE=");
 919                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
 920                         len += sprintf(buf + len, "%02x",
 921                                        ifmgd->assocresp_ies[i]);
 922                 }
 923         }
 924
 925         if (len <= IW_CUSTOM_MAX) {
 926                 memset(&wrqu, 0, sizeof(wrqu));
 927                 wrqu.data.length = len;
 928                 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
 929         }
 930
 931         kfree(buf);
 932 }
 933
 934
 935 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 936                                      u32 bss_info_changed)
 937 {
 938         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 939         struct ieee80211_local *local = sdata->local;
 940         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 941
 942         struct ieee80211_bss *bss;
 943
 944         bss_info_changed |= BSS_CHANGED_ASSOC;
 945         ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
 946
 947         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 948                                    conf->channel->center_freq,
 949                                    ifmgd->ssid, ifmgd->ssid_len);
 950         if (bss) {
 951                 /* set timing information */
 952                 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
 953                 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
 954                 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
 955
 956                 bss_info_changed |= BSS_CHANGED_BEACON_INT;
 957                 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
 958                         bss->cbss.capability, bss->has_erp_value, bss->erp_value);
 959
 960                 cfg80211_hold_bss(&bss->cbss);
 961
 962                 ieee80211_rx_bss_put(local, bss);
 963         }
 964
 965         ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
 966         memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
 967         ieee80211_sta_send_associnfo(sdata);
 968
 969         ifmgd->last_probe = jiffies;
 970         ieee80211_led_assoc(local, 1);
 971
 972         sdata->vif.bss_conf.assoc = 1;
 973         /*
 974          * For now just always ask the driver to update the basic rateset
 975          * when we have associated, we aren't checking whether it actually
 976          * changed or not.
 977          */
 978         bss_info_changed |= BSS_CHANGED_BASIC_RATES;
 979
 980         /* And the BSSID changed - we're associated now */
 981         bss_info_changed |= BSS_CHANGED_BSSID;
 982
 983         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
 984
 985         /* will be same as sdata */
 986         if (local->ps_sdata) {
 987                 mutex_lock(&local->iflist_mtx);
 988                 ieee80211_recalc_ps(local, -1);
 989                 mutex_unlock(&local->iflist_mtx);
 990         }
 991
 992         netif_tx_start_all_queues(sdata->dev);
 993         netif_carrier_on(sdata->dev);
 994
 995         ieee80211_sta_send_apinfo(sdata);
 996 }
 997
 998 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
 999 {
1000         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1001         struct ieee80211_local *local = sdata->local;
1002
1003         ifmgd->direct_probe_tries++;
1004         if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
1005                 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
1006                        sdata->dev->name, ifmgd->bssid);
1007                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1008                 ieee80211_recalc_idle(local);
1009                 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
1010
1011                 /*
1012                  * Most likely AP is not in the range so remove the
1013                  * bss information associated to the AP
1014                  */
1015                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1016                                 sdata->local->hw.conf.channel->center_freq,
1017                                 ifmgd->ssid, ifmgd->ssid_len);
1018
1019                 /*
1020                  * We might have a pending scan which had no chance to run yet
1021                  * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
1022                  * Hence, queue the STAs work again
1023                  */
1024                 queue_work(local->hw.workqueue, &ifmgd->work);
1025                 return;
1026         }
1027
1028         printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
1029                         sdata->dev->name, ifmgd->bssid,
1030                         ifmgd->direct_probe_tries);
1031
1032         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1033
1034         /* Direct probe is sent to broadcast address as some APs
1035          * will not answer to direct packet in unassociated state.
1036          */
1037         ieee80211_send_probe_req(sdata, NULL,
1038                                  ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
1039
1040         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1041 }
1042
1043
1044 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
1045 {
1046         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1047         struct ieee80211_local *local = sdata->local;
1048         u8 *ies;
1049         size_t ies_len;
1050
1051         ifmgd->auth_tries++;
1052         if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
1053                 printk(KERN_DEBUG "%s: authentication with AP %pM"
1054                        " timed out\n",
1055                        sdata->dev->name, ifmgd->bssid);
1056                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1057                 ieee80211_recalc_idle(local);
1058                 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
1059                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1060                                 sdata->local->hw.conf.channel->center_freq,
1061                                 ifmgd->ssid, ifmgd->ssid_len);
1062
1063                 /*
1064                  * We might have a pending scan which had no chance to run yet
1065                  * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1066                  * Hence, queue the STAs work again
1067                  */
1068                 queue_work(local->hw.workqueue, &ifmgd->work);
1069                 return;
1070         }
1071
1072         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1073         printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
1074                sdata->dev->name, ifmgd->bssid);
1075
1076         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1077                 ies = ifmgd->sme_auth_ie;
1078                 ies_len = ifmgd->sme_auth_ie_len;
1079         } else {
1080                 ies = NULL;
1081                 ies_len = 0;
1082         }
1083         ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
1084                             ifmgd->bssid, 0);
1085         ifmgd->auth_transaction = 2;
1086
1087         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1088 }
1089
1090 /*
1091  * The disassoc 'reason' argument can be either our own reason
1092  * if self disconnected or a reason code from the AP.
1093  */
1094 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1095                                    bool deauth, bool self_disconnected,
1096                                    u16 reason)
1097 {
1098         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1099         struct ieee80211_local *local = sdata->local;
1100         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1101         struct ieee80211_bss *bss;
1102         struct sta_info *sta;
1103         u32 changed = 0, config_changed = 0;
1104
1105         rcu_read_lock();
1106
1107         sta = sta_info_get(local, ifmgd->bssid);
1108         if (!sta) {
1109                 rcu_read_unlock();
1110                 return;
1111         }
1112
1113         if (deauth) {
1114                 ifmgd->direct_probe_tries = 0;
1115                 ifmgd->auth_tries = 0;
1116         }
1117         ifmgd->assoc_scan_tries = 0;
1118         ifmgd->assoc_tries = 0;
1119
1120         netif_tx_stop_all_queues(sdata->dev);
1121         netif_carrier_off(sdata->dev);
1122
1123         ieee80211_sta_tear_down_BA_sessions(sta);
1124
1125         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1126                                    conf->channel->center_freq,
1127                                    ifmgd->ssid, ifmgd->ssid_len);
1128
1129         if (bss) {
1130                 cfg80211_unhold_bss(&bss->cbss);
1131                 ieee80211_rx_bss_put(local, bss);
1132         }
1133
1134         if (self_disconnected) {
1135                 if (deauth)
1136                         ieee80211_send_deauth_disassoc(sdata,
1137                                 IEEE80211_STYPE_DEAUTH, reason);
1138                 else
1139                         ieee80211_send_deauth_disassoc(sdata,
1140                                 IEEE80211_STYPE_DISASSOC, reason);
1141         }
1142
1143         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1144         changed |= ieee80211_reset_erp_info(sdata);
1145
1146         ieee80211_led_assoc(local, 0);
1147         changed |= BSS_CHANGED_ASSOC;
1148         sdata->vif.bss_conf.assoc = false;
1149
1150         ieee80211_sta_send_apinfo(sdata);
1151
1152         if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1153                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1154                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1155                                 sdata->local->hw.conf.channel->center_freq,
1156                                 ifmgd->ssid, ifmgd->ssid_len);
1157         }
1158
1159         rcu_read_unlock();
1160
1161         ieee80211_set_wmm_default(sdata);
1162
1163         ieee80211_recalc_idle(local);
1164
1165         /* channel(_type) changes are handled by ieee80211_hw_config */
1166         local->oper_channel_type = NL80211_CHAN_NO_HT;
1167
1168         /* on the next assoc, re-program HT parameters */
1169         sdata->ht_opmode_valid = false;
1170
1171         local->power_constr_level = 0;
1172
1173         del_timer_sync(&local->dynamic_ps_timer);
1174         cancel_work_sync(&local->dynamic_ps_enable_work);
1175
1176         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1177                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1178                 config_changed |= IEEE80211_CONF_CHANGE_PS;
1179         }
1180
1181         ieee80211_hw_config(local, config_changed);
1182
1183         /* And the BSSID changed -- not very interesting here */
1184         changed |= BSS_CHANGED_BSSID;
1185         ieee80211_bss_info_change_notify(sdata, changed);
1186
1187         rcu_read_lock();
1188
1189         sta = sta_info_get(local, ifmgd->bssid);
1190         if (!sta) {
1191                 rcu_read_unlock();
1192                 return;
1193         }
1194
1195         sta_info_unlink(&sta);
1196
1197         rcu_read_unlock();
1198
1199         sta_info_destroy(sta);
1200 }
1201
1202 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1203 {
1204         if (!sdata || !sdata->default_key ||
1205             sdata->default_key->conf.alg != ALG_WEP)
1206                 return 0;
1207         return 1;
1208 }
1209
1210 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1211 {
1212         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1213         struct ieee80211_local *local = sdata->local;
1214         struct ieee80211_bss *bss;
1215         int bss_privacy;
1216         int wep_privacy;
1217         int privacy_invoked;
1218
1219         if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1220                 return 0;
1221
1222         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1223                                    local->hw.conf.channel->center_freq,
1224                                    ifmgd->ssid, ifmgd->ssid_len);
1225         if (!bss)
1226                 return 0;
1227
1228         bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1229         wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1230         privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1231
1232         ieee80211_rx_bss_put(local, bss);
1233
1234         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1235                 return 0;
1236
1237         return 1;
1238 }
1239
1240 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1241 {
1242         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1243         struct ieee80211_local *local = sdata->local;
1244
1245         ifmgd->assoc_tries++;
1246         if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1247                 printk(KERN_DEBUG "%s: association with AP %pM"
1248                        " timed out\n",
1249                        sdata->dev->name, ifmgd->bssid);
1250                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1251                 ieee80211_recalc_idle(local);
1252                 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1253                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1254                                 sdata->local->hw.conf.channel->center_freq,
1255                                 ifmgd->ssid, ifmgd->ssid_len);
1256                 /*
1257                  * We might have a pending scan which had no chance to run yet
1258                  * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1259                  * Hence, queue the STAs work again
1260                  */
1261                 queue_work(local->hw.workqueue, &ifmgd->work);
1262                 return;
1263         }
1264
1265         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1266         printk(KERN_DEBUG "%s: associate with AP %pM\n",
1267                sdata->dev->name, ifmgd->bssid);
1268         if (ieee80211_privacy_mismatch(sdata)) {
1269                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1270                        "mixed-cell disabled - abort association\n", sdata->dev->name);
1271                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1272                 ieee80211_recalc_idle(local);
1273                 return;
1274         }
1275
1276         ieee80211_send_assoc(sdata);
1277
1278         mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1279 }
1280
1281 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1282                              struct ieee80211_hdr *hdr)
1283 {
1284         /*
1285          * We can postpone the mgd.timer whenever receiving unicast frames
1286          * from AP because we know that the connection is working both ways
1287          * at that time. But multicast frames (and hence also beacons) must
1288          * be ignored here, because we need to trigger the timer during
1289          * data idle periods for sending the periodical probe request to
1290          * the AP.
1291          */
1292         if (!is_multicast_ether_addr(hdr->addr1))
1293                 mod_timer(&sdata->u.mgd.timer,
1294                           jiffies + IEEE80211_MONITORING_INTERVAL);
1295 }
1296
1297 void ieee80211_beacon_loss_work(struct work_struct *work)
1298 {
1299         struct ieee80211_sub_if_data *sdata =
1300                 container_of(work, struct ieee80211_sub_if_data,
1301                              u.mgd.beacon_loss_work);
1302         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1303
1304         /*
1305          * The driver has already reported this event and we have
1306          * already sent a probe request. Maybe the AP died and the
1307          * driver keeps reporting until we disassociate... We have
1308          * to ignore that because otherwise we would continually
1309          * reset the timer and never check whether we received a
1310          * probe response!
1311          */
1312         if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1313                 return;
1314
1315 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1316         if (net_ratelimit()) {
1317                 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1318                        "- sending probe request\n", sdata->dev->name,
1319                        sdata->u.mgd.bssid);
1320         }
1321 #endif
1322
1323         ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1324
1325         mutex_lock(&sdata->local->iflist_mtx);
1326         ieee80211_recalc_ps(sdata->local, -1);
1327         mutex_unlock(&sdata->local->iflist_mtx);
1328
1329         ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1330                                  ifmgd->ssid_len, NULL, 0);
1331
1332         mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1333 }
1334
1335 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1336 {
1337         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1338
1339         queue_work(sdata->local->hw.workqueue,
1340                    &sdata->u.mgd.beacon_loss_work);
1341 }
1342 EXPORT_SYMBOL(ieee80211_beacon_loss);
1343
1344 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1345 {
1346         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1347         struct ieee80211_local *local = sdata->local;
1348         struct sta_info *sta;
1349         unsigned long last_rx;
1350         bool disassoc = false;
1351
1352         /* TODO: start monitoring current AP signal quality and number of
1353          * missed beacons. Scan other channels every now and then and search
1354          * for better APs. */
1355         /* TODO: remove expired BSSes */
1356
1357         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1358
1359         rcu_read_lock();
1360
1361         sta = sta_info_get(local, ifmgd->bssid);
1362         if (!sta) {
1363                 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1364                        sdata->dev->name, ifmgd->bssid);
1365                 disassoc = true;
1366                 rcu_read_unlock();
1367                 goto out;
1368         }
1369
1370         last_rx = sta->last_rx;
1371         rcu_read_unlock();
1372
1373         if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1374             time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) {
1375                 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1376                        "- disassociating\n",
1377                        sdata->dev->name, ifmgd->bssid);
1378                 disassoc = true;
1379                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1380                 goto out;
1381         }
1382
1383         /*
1384          * Beacon filtering is only enabled with power save and then the
1385          * stack should not check for beacon loss.
1386          */
1387         if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1388               (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1389             time_after(jiffies,
1390                        ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1391 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1392                 if (net_ratelimit()) {
1393                         printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1394                                "- sending probe request\n",
1395                                sdata->dev->name, ifmgd->bssid);
1396                 }
1397 #endif
1398                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1399                 mutex_lock(&local->iflist_mtx);
1400                 ieee80211_recalc_ps(local, -1);
1401                 mutex_unlock(&local->iflist_mtx);
1402                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1403                                          ifmgd->ssid_len, NULL, 0);
1404                 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1405                 goto out;
1406         }
1407
1408         if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1409                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1410                 mutex_lock(&local->iflist_mtx);
1411                 ieee80211_recalc_ps(local, -1);
1412                 mutex_unlock(&local->iflist_mtx);
1413                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1414                                          ifmgd->ssid_len, NULL, 0);
1415         }
1416
1417  out:
1418         if (!disassoc)
1419                 mod_timer(&ifmgd->timer,
1420                           jiffies + IEEE80211_MONITORING_INTERVAL);
1421         else
1422                 ieee80211_set_disassoc(sdata, true, true,
1423                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1424 }
1425
1426
1427 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1428 {
1429         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1430
1431         printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1432         ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1433         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1434                 /* Wait for SME to request association */
1435                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1436                 ieee80211_recalc_idle(sdata->local);
1437         } else
1438                 ieee80211_associate(sdata);
1439 }
1440
1441
1442 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1443                                      struct ieee80211_mgmt *mgmt,
1444                                      size_t len)
1445 {
1446         u8 *pos;
1447         struct ieee802_11_elems elems;
1448
1449         pos = mgmt->u.auth.variable;
1450         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1451         if (!elems.challenge)
1452                 return;
1453         ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1454                             elems.challenge - 2, elems.challenge_len + 2,
1455                             sdata->u.mgd.bssid, 1);
1456         sdata->u.mgd.auth_transaction = 4;
1457 }
1458
1459 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1460                                    struct ieee80211_mgmt *mgmt,
1461                                    size_t len)
1462 {
1463         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1464         u16 auth_alg, auth_transaction, status_code;
1465
1466         if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1467                 return;
1468
1469         if (len < 24 + 6)
1470                 return;
1471
1472         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1473                 return;
1474
1475         if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1476                 return;
1477
1478         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1479         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1480         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1481
1482         if (auth_alg != ifmgd->auth_alg ||
1483             auth_transaction != ifmgd->auth_transaction)
1484                 return;
1485
1486         if (status_code != WLAN_STATUS_SUCCESS) {
1487                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1488                         u8 algs[3];
1489                         const int num_algs = ARRAY_SIZE(algs);
1490                         int i, pos;
1491                         algs[0] = algs[1] = algs[2] = 0xff;
1492                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1493                                 algs[0] = WLAN_AUTH_OPEN;
1494                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1495                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1496                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1497                                 algs[2] = WLAN_AUTH_LEAP;
1498                         if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1499                                 pos = 0;
1500                         else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1501                                 pos = 1;
1502                         else
1503                                 pos = 2;
1504                         for (i = 0; i < num_algs; i++) {
1505                                 pos++;
1506                                 if (pos >= num_algs)
1507                                         pos = 0;
1508                                 if (algs[pos] == ifmgd->auth_alg ||
1509                                     algs[pos] == 0xff)
1510                                         continue;
1511                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1512                                     !ieee80211_sta_wep_configured(sdata))
1513                                         continue;
1514                                 ifmgd->auth_alg = algs[pos];
1515                                 break;
1516                         }
1517                 }
1518                 return;
1519         }
1520
1521         switch (ifmgd->auth_alg) {
1522         case WLAN_AUTH_OPEN:
1523         case WLAN_AUTH_LEAP:
1524         case WLAN_AUTH_FT:
1525                 ieee80211_auth_completed(sdata);
1526                 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1527                 break;
1528         case WLAN_AUTH_SHARED_KEY:
1529                 if (ifmgd->auth_transaction == 4) {
1530                         ieee80211_auth_completed(sdata);
1531                         cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1532                 } else
1533                         ieee80211_auth_challenge(sdata, mgmt, len);
1534                 break;
1535         }
1536 }
1537
1538
1539 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1540                                      struct ieee80211_mgmt *mgmt,
1541                                      size_t len)
1542 {
1543         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1544         u16 reason_code;
1545
1546         if (len < 24 + 2)
1547                 return;
1548
1549         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1550                 return;
1551
1552         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1553
1554         if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1555                 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1556                                 sdata->dev->name, reason_code);
1557
1558         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1559             (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1560              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1561              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1562                 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1563                 mod_timer(&ifmgd->timer, jiffies +
1564                                       IEEE80211_RETRY_AUTH_INTERVAL);
1565         }
1566
1567         ieee80211_set_disassoc(sdata, true, false, 0);
1568         ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1569         cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1570 }
1571
1572
1573 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1574                                        struct ieee80211_mgmt *mgmt,
1575                                        size_t len)
1576 {
1577         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1578         u16 reason_code;
1579
1580         if (len < 24 + 2)
1581                 return;
1582
1583         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1584                 return;
1585
1586         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1587
1588         if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1589                 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1590                                 sdata->dev->name, reason_code);
1591
1592         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1593             ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1594                 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1595                 mod_timer(&ifmgd->timer, jiffies +
1596                                       IEEE80211_RETRY_AUTH_INTERVAL);
1597         }
1598
1599         ieee80211_set_disassoc(sdata, false, false, reason_code);
1600         cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1601 }
1602
1603
1604 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1605                                          struct ieee80211_mgmt *mgmt,
1606                                          size_t len,
1607                                          int reassoc)
1608 {
1609         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1610         struct ieee80211_local *local = sdata->local;
1611         struct ieee80211_supported_band *sband;
1612         struct sta_info *sta;
1613         u32 rates, basic_rates;
1614         u16 capab_info, status_code, aid;
1615         struct ieee802_11_elems elems;
1616         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1617         u8 *pos;
1618         u32 changed = 0;
1619         int i, j;
1620         bool have_higher_than_11mbit = false, newsta = false;
1621         u16 ap_ht_cap_flags;
1622
1623         /* AssocResp and ReassocResp have identical structure, so process both
1624          * of them in this function. */
1625
1626         if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1627                 return;
1628
1629         if (len < 24 + 6)
1630                 return;
1631
1632         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1633                 return;
1634
1635         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1636         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1637         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1638
1639         printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1640                "status=%d aid=%d)\n",
1641                sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1642                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1643
1644         pos = mgmt->u.assoc_resp.variable;
1645         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1646
1647         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1648             elems.timeout_int && elems.timeout_int_len == 5 &&
1649             elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1650                 u32 tu, ms;
1651                 tu = get_unaligned_le32(elems.timeout_int + 1);
1652                 ms = tu * 1024 / 1000;
1653                 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1654                        "comeback duration %u TU (%u ms)\n",
1655                        sdata->dev->name, tu, ms);
1656                 if (ms > IEEE80211_ASSOC_TIMEOUT)
1657                         mod_timer(&ifmgd->timer,
1658                                   jiffies + msecs_to_jiffies(ms));
1659                 return;
1660         }
1661
1662         if (status_code != WLAN_STATUS_SUCCESS) {
1663                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1664                        sdata->dev->name, status_code);
1665                 /* if this was a reassociation, ensure we try a "full"
1666                  * association next time. This works around some broken APs
1667                  * which do not correctly reject reassociation requests. */
1668                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1669                 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1670                 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1671                         /* Wait for SME to decide what to do next */
1672                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1673                         ieee80211_recalc_idle(local);
1674                 }
1675                 return;
1676         }
1677
1678         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1679                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1680                        "set\n", sdata->dev->name, aid);
1681         aid &= ~(BIT(15) | BIT(14));
1682
1683         if (!elems.supp_rates) {
1684                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1685                        sdata->dev->name);
1686                 return;
1687         }
1688
1689         printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1690         ifmgd->aid = aid;
1691         ifmgd->ap_capab = capab_info;
1692
1693         kfree(ifmgd->assocresp_ies);
1694         ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1695         ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1696         if (ifmgd->assocresp_ies)
1697                 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1698
1699         rcu_read_lock();
1700
1701         /* Add STA entry for the AP */
1702         sta = sta_info_get(local, ifmgd->bssid);
1703         if (!sta) {
1704                 newsta = true;
1705
1706                 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1707                 if (!sta) {
1708                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1709                                " the AP\n", sdata->dev->name);
1710                         rcu_read_unlock();
1711                         return;
1712                 }
1713
1714                 /* update new sta with its last rx activity */
1715                 sta->last_rx = jiffies;
1716         }
1717
1718         /*
1719          * FIXME: Do we really need to update the sta_info's information here?
1720          *        We already know about the AP (we found it in our list) so it
1721          *        should already be filled with the right info, no?
1722          *        As is stands, all this is racy because typically we assume
1723          *        the information that is filled in here (except flags) doesn't
1724          *        change while a STA structure is alive. As such, it should move
1725          *        to between the sta_info_alloc() and sta_info_insert() above.
1726          */
1727
1728         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1729         if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1730                 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1731
1732         rates = 0;
1733         basic_rates = 0;
1734         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1735
1736         for (i = 0; i < elems.supp_rates_len; i++) {
1737                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1738                 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1739
1740                 if (rate > 110)
1741                         have_higher_than_11mbit = true;
1742
1743                 for (j = 0; j < sband->n_bitrates; j++) {
1744                         if (sband->bitrates[j].bitrate == rate) {
1745                                 rates |= BIT(j);
1746                                 if (is_basic)
1747                                         basic_rates |= BIT(j);
1748                                 break;
1749                         }
1750                 }
1751         }
1752
1753         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1754                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1755                 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1756
1757                 if (rate > 110)
1758                         have_higher_than_11mbit = true;
1759
1760                 for (j = 0; j < sband->n_bitrates; j++) {
1761                         if (sband->bitrates[j].bitrate == rate) {
1762                                 rates |= BIT(j);
1763                                 if (is_basic)
1764                                         basic_rates |= BIT(j);
1765                                 break;
1766                         }
1767                 }
1768         }
1769
1770         sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1771         sdata->vif.bss_conf.basic_rates = basic_rates;
1772
1773         /* cf. IEEE 802.11 9.2.12 */
1774         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1775             have_higher_than_11mbit)
1776                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1777         else
1778                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1779
1780         /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1781         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1782                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1783                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1784
1785         ap_ht_cap_flags = sta->sta.ht_cap.cap;
1786
1787         rate_control_rate_init(sta);
1788
1789         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1790                 set_sta_flags(sta, WLAN_STA_MFP);
1791
1792         if (elems.wmm_param)
1793                 set_sta_flags(sta, WLAN_STA_WME);
1794
1795         if (newsta) {
1796                 int err = sta_info_insert(sta);
1797                 if (err) {
1798                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1799                                " the AP (error %d)\n", sdata->dev->name, err);
1800                         rcu_read_unlock();
1801                         return;
1802                 }
1803         }
1804
1805         rcu_read_unlock();
1806
1807         if (elems.wmm_param)
1808                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1809                                          elems.wmm_param_len);
1810         else
1811                 ieee80211_set_wmm_default(sdata);
1812
1813         if (elems.ht_info_elem && elems.wmm_param &&
1814             (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1815             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1816                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1817                                                ap_ht_cap_flags);
1818
1819         /* set AID and assoc capability,
1820          * ieee80211_set_associated() will tell the driver */
1821         bss_conf->aid = aid;
1822         bss_conf->assoc_capability = capab_info;
1823         ieee80211_set_associated(sdata, changed);
1824
1825         /*
1826          * initialise the time of last beacon to be the association time,
1827          * otherwise beacon loss check will trigger immediately
1828          */
1829         ifmgd->last_beacon = jiffies;
1830
1831         ieee80211_associated(sdata);
1832         cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1833 }
1834
1835
1836 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1837                                   struct ieee80211_mgmt *mgmt,
1838                                   size_t len,
1839                                   struct ieee80211_rx_status *rx_status,
1840                                   struct ieee802_11_elems *elems,
1841                                   bool beacon)
1842 {
1843         struct ieee80211_local *local = sdata->local;
1844         int freq;
1845         struct ieee80211_bss *bss;
1846         struct ieee80211_channel *channel;
1847
1848         if (elems->ds_params && elems->ds_params_len == 1)
1849                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1850         else
1851                 freq = rx_status->freq;
1852
1853         channel = ieee80211_get_channel(local->hw.wiphy, freq);
1854
1855         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1856                 return;
1857
1858         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1859                                         channel, beacon);
1860         if (!bss)
1861                 return;
1862
1863         if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1864             (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1865                 struct ieee80211_channel_sw_ie *sw_elem =
1866                         (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1867                 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1868         }
1869
1870         ieee80211_rx_bss_put(local, bss);
1871 }
1872
1873
1874 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1875                                          struct ieee80211_mgmt *mgmt,
1876                                          size_t len,
1877                                          struct ieee80211_rx_status *rx_status)
1878 {
1879         struct ieee80211_if_managed *ifmgd;
1880         size_t baselen;
1881         struct ieee802_11_elems elems;
1882
1883         ifmgd = &sdata->u.mgd;
1884
1885         if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1886                 return; /* ignore ProbeResp to foreign address */
1887
1888         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1889         if (baselen > len)
1890                 return;
1891
1892         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1893                                 &elems);
1894
1895         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1896
1897         /* direct probe may be part of the association flow */
1898         if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1899                 printk(KERN_DEBUG "%s direct probe responded\n",
1900                        sdata->dev->name);
1901                 ieee80211_authenticate(sdata);
1902         }
1903
1904         if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1905                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1906                 mutex_lock(&sdata->local->iflist_mtx);
1907                 ieee80211_recalc_ps(sdata->local, -1);
1908                 mutex_unlock(&sdata->local->iflist_mtx);
1909         }
1910 }
1911
1912 /*
1913  * This is the canonical list of information elements we care about,
1914  * the filter code also gives us all changes to the Microsoft OUI
1915  * (00:50:F2) vendor IE which is used for WMM which we need to track.
1916  *
1917  * We implement beacon filtering in software since that means we can
1918  * avoid processing the frame here and in cfg80211, and userspace
1919  * will not be able to tell whether the hardware supports it or not.
1920  *
1921  * XXX: This list needs to be dynamic -- userspace needs to be able to
1922  *      add items it requires. It also needs to be able to tell us to
1923  *      look out for other vendor IEs.
1924  */
1925 static const u64 care_about_ies =
1926         (1ULL << WLAN_EID_COUNTRY) |
1927         (1ULL << WLAN_EID_ERP_INFO) |
1928         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1929         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1930         (1ULL << WLAN_EID_HT_CAPABILITY) |
1931         (1ULL << WLAN_EID_HT_INFORMATION);
1932
1933 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1934                                      struct ieee80211_mgmt *mgmt,
1935                                      size_t len,
1936                                      struct ieee80211_rx_status *rx_status)
1937 {
1938         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1939         size_t baselen;
1940         struct ieee802_11_elems elems;
1941         struct ieee80211_local *local = sdata->local;
1942         u32 changed = 0;
1943         bool erp_valid, directed_tim = false;
1944         u8 erp_value = 0;
1945         u32 ncrc;
1946
1947         /* Process beacon from the current BSS */
1948         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1949         if (baselen > len)
1950                 return;
1951
1952         if (rx_status->freq != local->hw.conf.channel->center_freq)
1953                 return;
1954
1955         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1956             memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1957                 return;
1958
1959         if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1960 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1961                 if (net_ratelimit()) {
1962                         printk(KERN_DEBUG "%s: cancelling probereq poll due "
1963                                "to a received beacon\n", sdata->dev->name);
1964                 }
1965 #endif
1966                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1967                 mutex_lock(&local->iflist_mtx);
1968                 ieee80211_recalc_ps(local, -1);
1969                 mutex_unlock(&local->iflist_mtx);
1970         }
1971
1972         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1973         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1974                                           len - baselen, &elems,
1975                                           care_about_ies, ncrc);
1976
1977         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1978                 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1979                                                    ifmgd->aid);
1980
1981         if (ncrc != ifmgd->beacon_crc) {
1982                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1983                                       true);
1984
1985                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1986                                          elems.wmm_param_len);
1987         }
1988
1989         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1990                 if (directed_tim) {
1991                         if (local->hw.conf.dynamic_ps_timeout > 0) {
1992                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1993                                 ieee80211_hw_config(local,
1994                                                     IEEE80211_CONF_CHANGE_PS);
1995                                 ieee80211_send_nullfunc(local, sdata, 0);
1996                         } else {
1997                                 local->pspolling = true;
1998
1999                                 /*
2000                                  * Here is assumed that the driver will be
2001                                  * able to send ps-poll frame and receive a
2002                                  * response even though power save mode is
2003                                  * enabled, but some drivers might require
2004                                  * to disable power save here. This needs
2005                                  * to be investigated.
2006                                  */
2007                                 ieee80211_send_pspoll(local, sdata);
2008                         }
2009                 }
2010         }
2011
2012         if (ncrc == ifmgd->beacon_crc)
2013                 return;
2014         ifmgd->beacon_crc = ncrc;
2015
2016         if (elems.erp_info && elems.erp_info_len >= 1) {
2017                 erp_valid = true;
2018                 erp_value = elems.erp_info[0];
2019         } else {
2020                 erp_valid = false;
2021         }
2022         changed |= ieee80211_handle_bss_capability(sdata,
2023                         le16_to_cpu(mgmt->u.beacon.capab_info),
2024                         erp_valid, erp_value);
2025
2026
2027         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2028             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
2029                 struct sta_info *sta;
2030                 struct ieee80211_supported_band *sband;
2031                 u16 ap_ht_cap_flags;
2032
2033                 rcu_read_lock();
2034
2035                 sta = sta_info_get(local, ifmgd->bssid);
2036                 if (!sta) {
2037                         rcu_read_unlock();
2038                         return;
2039                 }
2040
2041                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2042
2043                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
2044                                 elems.ht_cap_elem, &sta->sta.ht_cap);
2045
2046                 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2047
2048                 rcu_read_unlock();
2049
2050                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2051                                                ap_ht_cap_flags);
2052         }
2053
2054         if (elems.country_elem) {
2055                 /* Note we are only reviewing this on beacons
2056                  * for the BSSID we are associated to */
2057                 regulatory_hint_11d(local->hw.wiphy,
2058                         elems.country_elem, elems.country_elem_len);
2059
2060                 /* TODO: IBSS also needs this */
2061                 if (elems.pwr_constr_elem)
2062                         ieee80211_handle_pwr_constr(sdata,
2063                                 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2064                                 elems.pwr_constr_elem,
2065                                 elems.pwr_constr_elem_len);
2066         }
2067
2068         ieee80211_bss_info_change_notify(sdata, changed);
2069 }
2070
2071 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
2072                                           struct sk_buff *skb,
2073                                           struct ieee80211_rx_status *rx_status)
2074 {
2075         struct ieee80211_local *local = sdata->local;
2076         struct ieee80211_mgmt *mgmt;
2077         u16 fc;
2078
2079         if (skb->len < 24)
2080                 return RX_DROP_MONITOR;
2081
2082         mgmt = (struct ieee80211_mgmt *) skb->data;
2083         fc = le16_to_cpu(mgmt->frame_control);
2084
2085         switch (fc & IEEE80211_FCTL_STYPE) {
2086         case IEEE80211_STYPE_PROBE_REQ:
2087         case IEEE80211_STYPE_PROBE_RESP:
2088         case IEEE80211_STYPE_BEACON:
2089                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2090         case IEEE80211_STYPE_AUTH:
2091         case IEEE80211_STYPE_ASSOC_RESP:
2092         case IEEE80211_STYPE_REASSOC_RESP:
2093         case IEEE80211_STYPE_DEAUTH:
2094         case IEEE80211_STYPE_DISASSOC:
2095                 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
2096                 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
2097                 return RX_QUEUED;
2098         }
2099
2100         return RX_DROP_MONITOR;
2101 }
2102
2103 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2104                                          struct sk_buff *skb)
2105 {
2106         struct ieee80211_rx_status *rx_status;
2107         struct ieee80211_mgmt *mgmt;
2108         u16 fc;
2109
2110         rx_status = (struct ieee80211_rx_status *) skb->cb;
2111         mgmt = (struct ieee80211_mgmt *) skb->data;
2112         fc = le16_to_cpu(mgmt->frame_control);
2113
2114         switch (fc & IEEE80211_FCTL_STYPE) {
2115         case IEEE80211_STYPE_PROBE_RESP:
2116                 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2117                                              rx_status);
2118                 break;
2119         case IEEE80211_STYPE_BEACON:
2120                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2121                                          rx_status);
2122                 break;
2123         case IEEE80211_STYPE_AUTH:
2124                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2125                 break;
2126         case IEEE80211_STYPE_ASSOC_RESP:
2127                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
2128                 break;
2129         case IEEE80211_STYPE_REASSOC_RESP:
2130                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
2131                 break;
2132         case IEEE80211_STYPE_DEAUTH:
2133                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2134                 break;
2135         case IEEE80211_STYPE_DISASSOC:
2136                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2137                 break;
2138         }
2139
2140         kfree_skb(skb);
2141 }
2142
2143 static void ieee80211_sta_timer(unsigned long data)
2144 {
2145         struct ieee80211_sub_if_data *sdata =
2146                 (struct ieee80211_sub_if_data *) data;
2147         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2148         struct ieee80211_local *local = sdata->local;
2149
2150         if (local->quiescing) {
2151                 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2152                 return;
2153         }
2154
2155         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2156         queue_work(local->hw.workqueue, &ifmgd->work);
2157 }
2158
2159 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
2160 {
2161         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2162         struct ieee80211_local *local = sdata->local;
2163
2164         /* Reset own TSF to allow time synchronization work. */
2165         drv_reset_tsf(local);
2166
2167         ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2168
2169
2170         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2171                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2172         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2173                 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2174         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2175                 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2176         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2177                 ifmgd->auth_alg = WLAN_AUTH_FT;
2178         else
2179                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2180         ifmgd->auth_transaction = -1;
2181         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2182         ifmgd->assoc_scan_tries = 0;
2183         ifmgd->direct_probe_tries = 0;
2184         ifmgd->auth_tries = 0;
2185         ifmgd->assoc_tries = 0;
2186         netif_tx_stop_all_queues(sdata->dev);
2187         netif_carrier_off(sdata->dev);
2188 }
2189
2190 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2191 {
2192         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2193         struct ieee80211_local *local = sdata->local;
2194         struct ieee80211_bss *bss;
2195         u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2196         u8 ssid_len = ifmgd->ssid_len;
2197         u16 capa_mask = WLAN_CAPABILITY_ESS;
2198         u16 capa_val = WLAN_CAPABILITY_ESS;
2199         struct ieee80211_channel *chan = local->oper_channel;
2200
2201         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2202             ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2203                             IEEE80211_STA_AUTO_BSSID_SEL |
2204                             IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2205                 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2206                 if (sdata->default_key)
2207                         capa_val |= WLAN_CAPABILITY_PRIVACY;
2208         }
2209
2210         if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2211                 chan = NULL;
2212
2213         if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2214                 bssid = NULL;
2215
2216         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2217                 ssid = NULL;
2218                 ssid_len = 0;
2219         }
2220
2221         bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2222                                        bssid, ssid, ssid_len,
2223                                        capa_mask, capa_val);
2224
2225         if (bss) {
2226                 local->oper_channel = bss->cbss.channel;
2227                 local->oper_channel_type = NL80211_CHAN_NO_HT;
2228                 ieee80211_hw_config(local, 0);
2229
2230                 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2231                         ieee80211_sta_set_ssid(sdata, bss->ssid,
2232                                                bss->ssid_len);
2233                 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2234                 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2235                                                     bss->supp_rates);
2236                 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2237                         sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2238                 else
2239                         sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2240
2241                 /* Send out direct probe if no probe resp was received or
2242                  * the one we have is outdated
2243                  */
2244                 if (!bss->last_probe_resp ||
2245                     time_after(jiffies, bss->last_probe_resp
2246                                         + IEEE80211_SCAN_RESULT_EXPIRE))
2247                         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2248                 else
2249                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2250
2251                 ieee80211_rx_bss_put(local, bss);
2252                 ieee80211_sta_reset_auth(sdata);
2253                 return 0;
2254         } else {
2255                 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2256
2257                         ifmgd->assoc_scan_tries++;
2258
2259                         ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2260                                                         ssid_len);
2261
2262                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2263                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2264                 } else {
2265                         ifmgd->assoc_scan_tries = 0;
2266                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2267                         ieee80211_recalc_idle(local);
2268                 }
2269         }
2270         return -1;
2271 }
2272
2273
2274 static void ieee80211_sta_work(struct work_struct *work)
2275 {
2276         struct ieee80211_sub_if_data *sdata =
2277                 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2278         struct ieee80211_local *local = sdata->local;
2279         struct ieee80211_if_managed *ifmgd;
2280         struct sk_buff *skb;
2281
2282         if (!netif_running(sdata->dev))
2283                 return;
2284
2285         if (local->sw_scanning || local->hw_scanning)
2286                 return;
2287
2288         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2289                 return;
2290
2291         /*
2292          * Nothing should have been stuffed into the workqueue during
2293          * the suspend->resume cycle. If this WARN is seen then there
2294          * is a bug with either the driver suspend or something in
2295          * mac80211 stuffing into the workqueue which we haven't yet
2296          * cleared during mac80211's suspend cycle.
2297          */
2298         if (WARN_ON(local->suspended))
2299                 return;
2300
2301         ifmgd = &sdata->u.mgd;
2302
2303         while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2304                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2305
2306         if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2307             ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2308             ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2309             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2310                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2311                                    round_jiffies_relative(0));
2312                 return;
2313         }
2314
2315         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2316                 if (ieee80211_sta_config_auth(sdata))
2317                         return;
2318                 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2319         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2320                 return;
2321
2322         ieee80211_recalc_idle(local);
2323
2324         switch (ifmgd->state) {
2325         case IEEE80211_STA_MLME_DISABLED:
2326                 break;
2327         case IEEE80211_STA_MLME_DIRECT_PROBE:
2328                 ieee80211_direct_probe(sdata);
2329                 break;
2330         case IEEE80211_STA_MLME_AUTHENTICATE:
2331                 ieee80211_authenticate(sdata);
2332                 break;
2333         case IEEE80211_STA_MLME_ASSOCIATE:
2334                 ieee80211_associate(sdata);
2335                 break;
2336         case IEEE80211_STA_MLME_ASSOCIATED:
2337                 ieee80211_associated(sdata);
2338                 break;
2339         default:
2340                 WARN_ON(1);
2341                 break;
2342         }
2343
2344         if (ieee80211_privacy_mismatch(sdata)) {
2345                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2346                        "mixed-cell disabled - disassociate\n", sdata->dev->name);
2347
2348                 ieee80211_set_disassoc(sdata, false, true,
2349                                         WLAN_REASON_UNSPECIFIED);
2350         }
2351 }
2352
2353 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2354 {
2355         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2356                 /*
2357                  * Need to update last_beacon to avoid beacon loss
2358                  * test to trigger.
2359                  */
2360                 sdata->u.mgd.last_beacon = jiffies;
2361
2362
2363                 queue_work(sdata->local->hw.workqueue,
2364                            &sdata->u.mgd.work);
2365         }
2366 }
2367
2368 #ifdef CONFIG_PM
2369 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2370 {
2371         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2372
2373         /*
2374          * we need to use atomic bitops for the running bits
2375          * only because both timers might fire at the same
2376          * time -- the code here is properly synchronised.
2377          */
2378
2379         cancel_work_sync(&ifmgd->work);
2380         cancel_work_sync(&ifmgd->beacon_loss_work);
2381         if (del_timer_sync(&ifmgd->timer))
2382                 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2383
2384         cancel_work_sync(&ifmgd->chswitch_work);
2385         if (del_timer_sync(&ifmgd->chswitch_timer))
2386                 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2387 }
2388
2389 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2390 {
2391         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2392
2393         if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2394                 add_timer(&ifmgd->timer);
2395         if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2396                 add_timer(&ifmgd->chswitch_timer);
2397 }
2398 #endif
2399
2400 /* interface setup */
2401 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2402 {
2403         struct ieee80211_if_managed *ifmgd;
2404         u32 hw_flags;
2405
2406         ifmgd = &sdata->u.mgd;
2407         INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2408         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2409         INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2410         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2411                     (unsigned long) sdata);
2412         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2413                     (unsigned long) sdata);
2414         skb_queue_head_init(&ifmgd->skb_queue);
2415
2416         ifmgd->capab = WLAN_CAPABILITY_ESS;
2417         ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2418                 IEEE80211_AUTH_ALG_SHARED_KEY;
2419         ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2420                 IEEE80211_STA_AUTO_BSSID_SEL |
2421                 IEEE80211_STA_AUTO_CHANNEL_SEL;
2422         if (sdata->local->hw.queues >= 4)
2423                 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2424
2425         hw_flags = sdata->local->hw.flags;
2426
2427         if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2428                 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2429                 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2430         }
2431 }
2432
2433 /* configuration hooks */
2434 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2435 {
2436         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2437         struct ieee80211_local *local = sdata->local;
2438
2439         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2440                 return;
2441
2442         if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2443                              IEEE80211_STA_AUTO_BSSID_SEL)) &&
2444             (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2445                              IEEE80211_STA_AUTO_SSID_SEL))) {
2446
2447                 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2448                         ieee80211_set_disassoc(sdata, true, true,
2449                                                WLAN_REASON_DEAUTH_LEAVING);
2450
2451                 if (ifmgd->ssid_len == 0) {
2452                         /*
2453                          * Only allow association to be started if a valid SSID
2454                          * is configured.
2455                          */
2456                         return;
2457                 }
2458
2459                 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2460                     ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2461                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2462                 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2463                         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2464                 queue_work(local->hw.workqueue, &ifmgd->work);
2465         }
2466 }
2467
2468 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2469 {
2470         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2471
2472         if (ifmgd->ssid_len)
2473                 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2474         else
2475                 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2476
2477         return 0;
2478 }
2479
2480 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2481 {
2482         struct ieee80211_if_managed *ifmgd;
2483
2484         if (len > IEEE80211_MAX_SSID_LEN)
2485                 return -EINVAL;
2486
2487         ifmgd = &sdata->u.mgd;
2488
2489         if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2490                 /*
2491                  * Do not use reassociation if SSID is changed (different ESS).
2492                  */
2493                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2494                 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2495                 memcpy(ifmgd->ssid, ssid, len);
2496                 ifmgd->ssid_len = len;
2497         }
2498
2499         return ieee80211_sta_commit(sdata);
2500 }
2501
2502 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2503 {
2504         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2505         memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2506         *len = ifmgd->ssid_len;
2507         return 0;
2508 }
2509
2510 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2511 {
2512         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2513
2514         if (is_valid_ether_addr(bssid)) {
2515                 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2516                 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2517         } else {
2518                 memset(ifmgd->bssid, 0, ETH_ALEN);
2519                 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2520         }
2521
2522         return ieee80211_sta_commit(sdata);
2523 }
2524
2525 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2526                                const char *ie, size_t len)
2527 {
2528         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2529
2530         if (len == 0 && ifmgd->extra_ie_len == 0)
2531                 return -EALREADY;
2532
2533         if (len == ifmgd->extra_ie_len && ifmgd->extra_ie &&
2534             memcmp(ifmgd->extra_ie, ie, len) == 0)
2535                 return -EALREADY;
2536
2537         kfree(ifmgd->extra_ie);
2538         if (len == 0) {
2539                 ifmgd->extra_ie = NULL;
2540                 ifmgd->extra_ie_len = 0;
2541                 return 0;
2542         }
2543         ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2544         if (!ifmgd->extra_ie) {
2545                 ifmgd->extra_ie_len = 0;
2546                 return -ENOMEM;
2547         }
2548         memcpy(ifmgd->extra_ie, ie, len);
2549         ifmgd->extra_ie_len = len;
2550         return 0;
2551 }
2552
2553 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2554 {
2555         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2556                sdata->dev->name, reason);
2557
2558         ieee80211_set_disassoc(sdata, true, true, reason);
2559         return 0;
2560 }
2561
2562 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2563 {
2564         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2565
2566         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2567                sdata->dev->name, reason);
2568
2569         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2570                 return -ENOLINK;
2571
2572         ieee80211_set_disassoc(sdata, false, true, reason);
2573         return 0;
2574 }
2575
2576 /* scan finished notification */
2577 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2578 {
2579         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2580
2581         /* Restart STA timers */
2582         rcu_read_lock();
2583         list_for_each_entry_rcu(sdata, &local->interfaces, list)
2584                 ieee80211_restart_sta_timer(sdata);
2585         rcu_read_unlock();
2586 }
2587
2588 int ieee80211_max_network_latency(struct notifier_block *nb,
2589                                   unsigned long data, void *dummy)
2590 {
2591         s32 latency_usec = (s32) data;
2592         struct ieee80211_local *local =
2593                 container_of(nb, struct ieee80211_local,
2594                              network_latency_notifier);
2595
2596         mutex_lock(&local->iflist_mtx);
2597         ieee80211_recalc_ps(local, latency_usec);
2598         mutex_unlock(&local->iflist_mtx);
2599
2600         return 0;
2601 }