SAFE public projects git trees. - safe/jmp/linux-2.6/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 "rate.h"
  27 #include "led.h"
  28
  29 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
  30 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  31 #define IEEE80211_AUTH_MAX_TRIES 3
  32 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  33 #define IEEE80211_ASSOC_MAX_TRIES 3
  34 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  35 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
  36 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  37
  38 /* utils */
  39 static int ecw2cw(int ecw)
  40 {
  41         return (1 << ecw) - 1;
  42 }
  43
  44 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
  45 {
  46         u8 *end, *pos;
  47
  48         pos = bss->cbss.information_elements;
  49         if (pos == NULL)
  50                 return NULL;
  51         end = pos + bss->cbss.len_information_elements;
  52
  53         while (pos + 1 < end) {
  54                 if (pos + 2 + pos[1] > end)
  55                         break;
  56                 if (pos[0] == ie)
  57                         return pos;
  58                 pos += 2 + pos[1];
  59         }
  60
  61         return NULL;
  62 }
  63
  64 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
  65                                       struct ieee80211_supported_band *sband,
  66                                       u32 *rates)
  67 {
  68         int i, j, count;
  69         *rates = 0;
  70         count = 0;
  71         for (i = 0; i < bss->supp_rates_len; i++) {
  72                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
  73
  74                 for (j = 0; j < sband->n_bitrates; j++)
  75                         if (sband->bitrates[j].bitrate == rate) {
  76                                 *rates |= BIT(j);
  77                                 count++;
  78                                 break;
  79                         }
  80         }
  81
  82         return count;
  83 }
  84
  85 /*
  86  * ieee80211_enable_ht should be called only after the operating band
  87  * has been determined as ht configuration depends on the hw's
  88  * HT abilities for a specific band.
  89  */
  90 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
  91                                struct ieee80211_ht_info *hti,
  92                                u16 ap_ht_cap_flags)
  93 {
  94         struct ieee80211_local *local = sdata->local;
  95         struct ieee80211_supported_band *sband;
  96         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
  97         struct ieee80211_bss_ht_conf ht;
  98         struct sta_info *sta;
  99         u32 changed = 0;
 100         bool enable_ht = true, ht_changed;
 101         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 102
 103         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 104
 105         memset(&ht, 0, sizeof(ht));
 106
 107         /* HT is not supported */
 108         if (!sband->ht_cap.ht_supported)
 109                 enable_ht = false;
 110
 111         /* check that channel matches the right operating channel */
 112         if (local->hw.conf.channel->center_freq !=
 113             ieee80211_channel_to_frequency(hti->control_chan))
 114                 enable_ht = false;
 115
 116         if (enable_ht) {
 117                 channel_type = NL80211_CHAN_HT20;
 118
 119                 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
 120                     (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
 121                     (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
 122                         switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 123                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 124                                 channel_type = NL80211_CHAN_HT40PLUS;
 125                                 break;
 126                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 127                                 channel_type = NL80211_CHAN_HT40MINUS;
 128                                 break;
 129                         }
 130                 }
 131         }
 132
 133         ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
 134                      channel_type != local->hw.conf.channel_type;
 135
 136         local->oper_channel_type = channel_type;
 137
 138         if (ht_changed) {
 139                 /* channel_type change automatically detected */
 140                 ieee80211_hw_config(local, 0);
 141
 142                 rcu_read_lock();
 143
 144                 sta = sta_info_get(local, ifmgd->bssid);
 145                 if (sta)
 146                         rate_control_rate_update(local, sband, sta,
 147                                                  IEEE80211_RC_HT_CHANGED);
 148
 149                 rcu_read_unlock();
 150
 151         }
 152
 153         /* disable HT */
 154         if (!enable_ht)
 155                 return 0;
 156
 157         ht.operation_mode = le16_to_cpu(hti->operation_mode);
 158
 159         /* if bss configuration changed store the new one */
 160         if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) {
 161                 changed |= BSS_CHANGED_HT;
 162                 sdata->vif.bss_conf.ht = ht;
 163         }
 164
 165         return changed;
 166 }
 167
 168 /* frame sending functions */
 169
 170 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 171 {
 172         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 173         struct ieee80211_local *local = sdata->local;
 174         struct sk_buff *skb;
 175         struct ieee80211_mgmt *mgmt;
 176         u8 *pos, *ies, *ht_ie;
 177         int i, len, count, rates_len, supp_rates_len;
 178         u16 capab;
 179         struct ieee80211_bss *bss;
 180         int wmm = 0;
 181         struct ieee80211_supported_band *sband;
 182         u32 rates = 0;
 183
 184         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 185                             sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
 186                             ifmgd->ssid_len);
 187         if (!skb) {
 188                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 189                        "frame\n", sdata->dev->name);
 190                 return;
 191         }
 192         skb_reserve(skb, local->hw.extra_tx_headroom);
 193
 194         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 195
 196         capab = ifmgd->capab;
 197
 198         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 199                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 200                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 201                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 202                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 203         }
 204
 205         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 206                                    local->hw.conf.channel->center_freq,
 207                                    ifmgd->ssid, ifmgd->ssid_len);
 208         if (bss) {
 209                 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
 210                         capab |= WLAN_CAPABILITY_PRIVACY;
 211                 if (bss->wmm_used)
 212                         wmm = 1;
 213
 214                 /* get all rates supported by the device and the AP as
 215                  * some APs don't like getting a superset of their rates
 216                  * in the association request (e.g. D-Link DAP 1353 in
 217                  * b-only mode) */
 218                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 219
 220                 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 221                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 222                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 223
 224                 ieee80211_rx_bss_put(local, bss);
 225         } else {
 226                 rates = ~0;
 227                 rates_len = sband->n_bitrates;
 228         }
 229
 230         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 231         memset(mgmt, 0, 24);
 232         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
 233         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 234         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
 235
 236         if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
 237                 skb_put(skb, 10);
 238                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 239                                                   IEEE80211_STYPE_REASSOC_REQ);
 240                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 241                 mgmt->u.reassoc_req.listen_interval =
 242                                 cpu_to_le16(local->hw.conf.listen_interval);
 243                 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
 244                        ETH_ALEN);
 245         } else {
 246                 skb_put(skb, 4);
 247                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 248                                                   IEEE80211_STYPE_ASSOC_REQ);
 249                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 250                 mgmt->u.assoc_req.listen_interval =
 251                                 cpu_to_le16(local->hw.conf.listen_interval);
 252         }
 253
 254         /* SSID */
 255         ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
 256         *pos++ = WLAN_EID_SSID;
 257         *pos++ = ifmgd->ssid_len;
 258         memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
 259
 260         /* add all rates which were marked to be used above */
 261         supp_rates_len = rates_len;
 262         if (supp_rates_len > 8)
 263                 supp_rates_len = 8;
 264
 265         len = sband->n_bitrates;
 266         pos = skb_put(skb, supp_rates_len + 2);
 267         *pos++ = WLAN_EID_SUPP_RATES;
 268         *pos++ = supp_rates_len;
 269
 270         count = 0;
 271         for (i = 0; i < sband->n_bitrates; i++) {
 272                 if (BIT(i) & rates) {
 273                         int rate = sband->bitrates[i].bitrate;
 274                         *pos++ = (u8) (rate / 5);
 275                         if (++count == 8)
 276                                 break;
 277                 }
 278         }
 279
 280         if (rates_len > count) {
 281                 pos = skb_put(skb, rates_len - count + 2);
 282                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 283                 *pos++ = rates_len - count;
 284
 285                 for (i++; i < sband->n_bitrates; i++) {
 286                         if (BIT(i) & rates) {
 287                                 int rate = sband->bitrates[i].bitrate;
 288                                 *pos++ = (u8) (rate / 5);
 289                         }
 290                 }
 291         }
 292
 293         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 294                 /* 1. power capabilities */
 295                 pos = skb_put(skb, 4);
 296                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 297                 *pos++ = 2;
 298                 *pos++ = 0; /* min tx power */
 299                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 300
 301                 /* 2. supported channels */
 302                 /* TODO: get this in reg domain format */
 303                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 304                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 305                 *pos++ = 2 * sband->n_channels;
 306                 for (i = 0; i < sband->n_channels; i++) {
 307                         *pos++ = ieee80211_frequency_to_channel(
 308                                         sband->channels[i].center_freq);
 309                         *pos++ = 1; /* one channel in the subband*/
 310                 }
 311         }
 312
 313         if (ifmgd->extra_ie) {
 314                 pos = skb_put(skb, ifmgd->extra_ie_len);
 315                 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
 316         }
 317
 318         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
 319                 pos = skb_put(skb, 9);
 320                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 321                 *pos++ = 7; /* len */
 322                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 323                 *pos++ = 0x50;
 324                 *pos++ = 0xf2;
 325                 *pos++ = 2; /* WME */
 326                 *pos++ = 0; /* WME info */
 327                 *pos++ = 1; /* WME ver */
 328                 *pos++ = 0;
 329         }
 330
 331         /* wmm support is a must to HT */
 332         /*
 333          * IEEE802.11n does not allow TKIP/WEP as pairwise
 334          * ciphers in HT mode. We still associate in non-ht
 335          * mode (11a/b/g) if any one of these ciphers is
 336          * configured as pairwise.
 337          */
 338         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
 339             sband->ht_cap.ht_supported &&
 340             (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
 341             ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
 342             (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
 343                 struct ieee80211_ht_info *ht_info =
 344                         (struct ieee80211_ht_info *)(ht_ie + 2);
 345                 u16 cap = sband->ht_cap.cap;
 346                 __le16 tmp;
 347                 u32 flags = local->hw.conf.channel->flags;
 348
 349                 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 350                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 351                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 352                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 353                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 354                         }
 355                         break;
 356                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 357                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 358                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 359                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 360                         }
 361                         break;
 362                 }
 363
 364                 tmp = cpu_to_le16(cap);
 365                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 366                 *pos++ = WLAN_EID_HT_CAPABILITY;
 367                 *pos++ = sizeof(struct ieee80211_ht_cap);
 368                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 369                 memcpy(pos, &tmp, sizeof(u16));
 370                 pos += sizeof(u16);
 371                 /* TODO: needs a define here for << 2 */
 372                 *pos++ = sband->ht_cap.ampdu_factor |
 373                          (sband->ht_cap.ampdu_density << 2);
 374                 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
 375         }
 376
 377         kfree(ifmgd->assocreq_ies);
 378         ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
 379         ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
 380         if (ifmgd->assocreq_ies)
 381                 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
 382
 383         ieee80211_tx_skb(sdata, skb, 0);
 384 }
 385
 386
 387 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
 388                                            u16 stype, u16 reason)
 389 {
 390         struct ieee80211_local *local = sdata->local;
 391         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 392         struct sk_buff *skb;
 393         struct ieee80211_mgmt *mgmt;
 394
 395         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 396         if (!skb) {
 397                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
 398                        "deauth/disassoc frame\n", sdata->dev->name);
 399                 return;
 400         }
 401         skb_reserve(skb, local->hw.extra_tx_headroom);
 402
 403         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 404         memset(mgmt, 0, 24);
 405         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
 406         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 407         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
 408         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
 409         skb_put(skb, 2);
 410         /* u.deauth.reason_code == u.disassoc.reason_code */
 411         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 412
 413         if (stype == IEEE80211_STYPE_DEAUTH)
 414                 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
 415         else
 416                 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
 417         ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
 418 }
 419
 420 void ieee80211_send_pspoll(struct ieee80211_local *local,
 421                            struct ieee80211_sub_if_data *sdata)
 422 {
 423         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 424         struct ieee80211_pspoll *pspoll;
 425         struct sk_buff *skb;
 426         u16 fc;
 427
 428         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
 429         if (!skb) {
 430                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
 431                        "pspoll frame\n", sdata->dev->name);
 432                 return;
 433         }
 434         skb_reserve(skb, local->hw.extra_tx_headroom);
 435
 436         pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
 437         memset(pspoll, 0, sizeof(*pspoll));
 438         fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
 439         pspoll->frame_control = cpu_to_le16(fc);
 440         pspoll->aid = cpu_to_le16(ifmgd->aid);
 441
 442         /* aid in PS-Poll has its two MSBs each set to 1 */
 443         pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
 444
 445         memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
 446         memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
 447
 448         ieee80211_tx_skb(sdata, skb, 0);
 449 }
 450
 451 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 452                              struct ieee80211_sub_if_data *sdata,
 453                              int powersave)
 454 {
 455         struct sk_buff *skb;
 456         struct ieee80211_hdr *nullfunc;
 457         __le16 fc;
 458
 459         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 460                 return;
 461
 462         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
 463         if (!skb) {
 464                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
 465                        "frame\n", sdata->dev->name);
 466                 return;
 467         }
 468         skb_reserve(skb, local->hw.extra_tx_headroom);
 469
 470         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
 471         memset(nullfunc, 0, 24);
 472         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 473                          IEEE80211_FCTL_TODS);
 474         if (powersave)
 475                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
 476         nullfunc->frame_control = fc;
 477         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 478         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
 479         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 480
 481         ieee80211_tx_skb(sdata, skb, 0);
 482 }
 483
 484 /* powersave */
 485 static void ieee80211_enable_ps(struct ieee80211_local *local,
 486                                 struct ieee80211_sub_if_data *sdata)
 487 {
 488         struct ieee80211_conf *conf = &local->hw.conf;
 489
 490         if (conf->dynamic_ps_timeout > 0 &&
 491             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
 492                 mod_timer(&local->dynamic_ps_timer, jiffies +
 493                           msecs_to_jiffies(conf->dynamic_ps_timeout));
 494         } else {
 495                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 496                         ieee80211_send_nullfunc(local, sdata, 1);
 497                 conf->flags |= IEEE80211_CONF_PS;
 498                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 499         }
 500 }
 501
 502 static void ieee80211_change_ps(struct ieee80211_local *local)
 503 {
 504         struct ieee80211_conf *conf = &local->hw.conf;
 505
 506         if (local->ps_sdata) {
 507                 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
 508                         return;
 509
 510                 ieee80211_enable_ps(local, local->ps_sdata);
 511         } else if (conf->flags & IEEE80211_CONF_PS) {
 512                 conf->flags &= ~IEEE80211_CONF_PS;
 513                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 514                 del_timer_sync(&local->dynamic_ps_timer);
 515                 cancel_work_sync(&local->dynamic_ps_enable_work);
 516         }
 517 }
 518
 519 /* need to hold RTNL or interface lock */
 520 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
 521 {
 522         struct ieee80211_sub_if_data *sdata, *found = NULL;
 523         int count = 0;
 524
 525         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
 526                 local->ps_sdata = NULL;
 527                 return;
 528         }
 529
 530         list_for_each_entry(sdata, &local->interfaces, list) {
 531                 if (!netif_running(sdata->dev))
 532                         continue;
 533                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
 534                         continue;
 535                 found = sdata;
 536                 count++;
 537         }
 538
 539         if (count == 1 && found->u.mgd.powersave) {
 540                 s32 beaconint_us;
 541
 542                 if (latency < 0)
 543                         latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
 544
 545                 beaconint_us = ieee80211_tu_to_usec(
 546                                         found->vif.bss_conf.beacon_int);
 547
 548                 if (beaconint_us > latency)
 549                         local->ps_sdata = NULL;
 550                 else
 551                         local->ps_sdata = found;
 552         } else {
 553                 local->ps_sdata = NULL;
 554         }
 555
 556         ieee80211_change_ps(local);
 557 }
 558
 559 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
 560 {
 561         struct ieee80211_local *local =
 562                 container_of(work, struct ieee80211_local,
 563                              dynamic_ps_disable_work);
 564
 565         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
 566                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
 567                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 568         }
 569
 570         ieee80211_wake_queues_by_reason(&local->hw,
 571                                         IEEE80211_QUEUE_STOP_REASON_PS);
 572 }
 573
 574 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
 575 {
 576         struct ieee80211_local *local =
 577                 container_of(work, struct ieee80211_local,
 578                              dynamic_ps_enable_work);
 579         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
 580
 581         /* can only happen when PS was just disabled anyway */
 582         if (!sdata)
 583                 return;
 584
 585         if (local->hw.conf.flags & IEEE80211_CONF_PS)
 586                 return;
 587
 588         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 589                 ieee80211_send_nullfunc(local, sdata, 1);
 590
 591         local->hw.conf.flags |= IEEE80211_CONF_PS;
 592         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 593 }
 594
 595 void ieee80211_dynamic_ps_timer(unsigned long data)
 596 {
 597         struct ieee80211_local *local = (void *) data;
 598
 599         queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
 600 }
 601
 602 /* MLME */
 603 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
 604                                      struct ieee80211_if_managed *ifmgd,
 605                                      u8 *wmm_param, size_t wmm_param_len)
 606 {
 607         struct ieee80211_tx_queue_params params;
 608         size_t left;
 609         int count;
 610         u8 *pos;
 611
 612         if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
 613                 return;
 614
 615         if (!wmm_param)
 616                 return;
 617
 618         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 619                 return;
 620         count = wmm_param[6] & 0x0f;
 621         if (count == ifmgd->wmm_last_param_set)
 622                 return;
 623         ifmgd->wmm_last_param_set = count;
 624
 625         pos = wmm_param + 8;
 626         left = wmm_param_len - 8;
 627
 628         memset(&params, 0, sizeof(params));
 629
 630         local->wmm_acm = 0;
 631         for (; left >= 4; left -= 4, pos += 4) {
 632                 int aci = (pos[0] >> 5) & 0x03;
 633                 int acm = (pos[0] >> 4) & 0x01;
 634                 int queue;
 635
 636                 switch (aci) {
 637                 case 1: /* AC_BK */
 638                         queue = 3;
 639                         if (acm)
 640                                 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
 641                         break;
 642                 case 2: /* AC_VI */
 643                         queue = 1;
 644                         if (acm)
 645                                 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
 646                         break;
 647                 case 3: /* AC_VO */
 648                         queue = 0;
 649                         if (acm)
 650                                 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
 651                         break;
 652                 case 0: /* AC_BE */
 653                 default:
 654                         queue = 2;
 655                         if (acm)
 656                                 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
 657                         break;
 658                 }
 659
 660                 params.aifs = pos[0] & 0x0f;
 661                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 662                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 663                 params.txop = get_unaligned_le16(pos + 2);
 664 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 665                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 666                        "cWmin=%d cWmax=%d txop=%d\n",
 667                        local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
 668                        params.cw_max, params.txop);
 669 #endif
 670                 if (local->ops->conf_tx &&
 671                     local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 672                         printk(KERN_DEBUG "%s: failed to set TX queue "
 673                                "parameters for queue %d\n", local->mdev->name, queue);
 674                 }
 675         }
 676 }
 677
 678 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 679                                            u16 capab, bool erp_valid, u8 erp)
 680 {
 681         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 682 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 683         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 684 #endif
 685         u32 changed = 0;
 686         bool use_protection;
 687         bool use_short_preamble;
 688         bool use_short_slot;
 689
 690         if (erp_valid) {
 691                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
 692                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
 693         } else {
 694                 use_protection = false;
 695                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
 696         }
 697
 698         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
 699
 700         if (use_protection != bss_conf->use_cts_prot) {
 701 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 702                 if (net_ratelimit()) {
 703                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
 704                                sdata->dev->name,
 705                                use_protection ? "enabled" : "disabled",
 706                                ifmgd->bssid);
 707                 }
 708 #endif
 709                 bss_conf->use_cts_prot = use_protection;
 710                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 711         }
 712
 713         if (use_short_preamble != bss_conf->use_short_preamble) {
 714 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 715                 if (net_ratelimit()) {
 716                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 717                                " (BSSID=%pM)\n",
 718                                sdata->dev->name,
 719                                use_short_preamble ? "short" : "long",
 720                                ifmgd->bssid);
 721                 }
 722 #endif
 723                 bss_conf->use_short_preamble = use_short_preamble;
 724                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 725         }
 726
 727         if (use_short_slot != bss_conf->use_short_slot) {
 728 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 729                 if (net_ratelimit()) {
 730                         printk(KERN_DEBUG "%s: switched to %s slot time"
 731                                " (BSSID=%pM)\n",
 732                                sdata->dev->name,
 733                                use_short_slot ? "short" : "long",
 734                                ifmgd->bssid);
 735                 }
 736 #endif
 737                 bss_conf->use_short_slot = use_short_slot;
 738                 changed |= BSS_CHANGED_ERP_SLOT;
 739         }
 740
 741         return changed;
 742 }
 743
 744 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
 745 {
 746         union iwreq_data wrqu;
 747
 748         memset(&wrqu, 0, sizeof(wrqu));
 749         if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
 750                 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
 751         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 752         wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
 753 }
 754
 755 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
 756 {
 757         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 758         char *buf;
 759         size_t len;
 760         int i;
 761         union iwreq_data wrqu;
 762
 763         if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
 764                 return;
 765
 766         buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
 767                                 ifmgd->assocresp_ies_len), GFP_KERNEL);
 768         if (!buf)
 769                 return;
 770
 771         len = sprintf(buf, "ASSOCINFO(");
 772         if (ifmgd->assocreq_ies) {
 773                 len += sprintf(buf + len, "ReqIEs=");
 774                 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
 775                         len += sprintf(buf + len, "%02x",
 776                                        ifmgd->assocreq_ies[i]);
 777                 }
 778         }
 779         if (ifmgd->assocresp_ies) {
 780                 if (ifmgd->assocreq_ies)
 781                         len += sprintf(buf + len, " ");
 782                 len += sprintf(buf + len, "RespIEs=");
 783                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
 784                         len += sprintf(buf + len, "%02x",
 785                                        ifmgd->assocresp_ies[i]);
 786                 }
 787         }
 788         len += sprintf(buf + len, ")");
 789
 790         if (len > IW_CUSTOM_MAX) {
 791                 len = sprintf(buf, "ASSOCRESPIE=");
 792                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
 793                         len += sprintf(buf + len, "%02x",
 794                                        ifmgd->assocresp_ies[i]);
 795                 }
 796         }
 797
 798         if (len <= IW_CUSTOM_MAX) {
 799                 memset(&wrqu, 0, sizeof(wrqu));
 800                 wrqu.data.length = len;
 801                 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
 802         }
 803
 804         kfree(buf);
 805 }
 806
 807
 808 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 809                                      u32 bss_info_changed)
 810 {
 811         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 812         struct ieee80211_local *local = sdata->local;
 813         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 814
 815         struct ieee80211_bss *bss;
 816
 817         bss_info_changed |= BSS_CHANGED_ASSOC;
 818         ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
 819
 820         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 821                                    conf->channel->center_freq,
 822                                    ifmgd->ssid, ifmgd->ssid_len);
 823         if (bss) {
 824                 /* set timing information */
 825                 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
 826                 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
 827                 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
 828
 829                 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
 830                         bss->cbss.capability, bss->has_erp_value, bss->erp_value);
 831
 832                 cfg80211_hold_bss(&bss->cbss);
 833
 834                 ieee80211_rx_bss_put(local, bss);
 835         }
 836
 837         ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
 838         memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
 839         ieee80211_sta_send_associnfo(sdata);
 840
 841         ifmgd->last_probe = jiffies;
 842         ieee80211_led_assoc(local, 1);
 843
 844         sdata->vif.bss_conf.assoc = 1;
 845         /*
 846          * For now just always ask the driver to update the basic rateset
 847          * when we have associated, we aren't checking whether it actually
 848          * changed or not.
 849          */
 850         bss_info_changed |= BSS_CHANGED_BASIC_RATES;
 851         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
 852
 853         /* will be same as sdata */
 854         if (local->ps_sdata)
 855                 ieee80211_enable_ps(local, sdata);
 856
 857         netif_tx_start_all_queues(sdata->dev);
 858         netif_carrier_on(sdata->dev);
 859
 860         ieee80211_sta_send_apinfo(sdata);
 861 }
 862
 863 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
 864 {
 865         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 866         struct ieee80211_local *local = sdata->local;
 867
 868         ifmgd->direct_probe_tries++;
 869         if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
 870                 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
 871                        sdata->dev->name, ifmgd->bssid);
 872                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
 873                 ieee80211_sta_send_apinfo(sdata);
 874
 875                 /*
 876                  * Most likely AP is not in the range so remove the
 877                  * bss information associated to the AP
 878                  */
 879                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
 880                                 sdata->local->hw.conf.channel->center_freq,
 881                                 ifmgd->ssid, ifmgd->ssid_len);
 882
 883                 /*
 884                  * We might have a pending scan which had no chance to run yet
 885                  * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
 886                  * Hence, queue the STAs work again
 887                  */
 888                 queue_work(local->hw.workqueue, &ifmgd->work);
 889                 return;
 890         }
 891
 892         printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
 893                         sdata->dev->name, ifmgd->bssid,
 894                         ifmgd->direct_probe_tries);
 895
 896         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
 897
 898         set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
 899
 900         /* Direct probe is sent to broadcast address as some APs
 901          * will not answer to direct packet in unassociated state.
 902          */
 903         ieee80211_send_probe_req(sdata, NULL,
 904                                  ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
 905
 906         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 907 }
 908
 909
 910 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
 911 {
 912         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 913         struct ieee80211_local *local = sdata->local;
 914         u8 *ies;
 915         size_t ies_len;
 916
 917         ifmgd->auth_tries++;
 918         if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 919                 printk(KERN_DEBUG "%s: authentication with AP %pM"
 920                        " timed out\n",
 921                        sdata->dev->name, ifmgd->bssid);
 922                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
 923                 ieee80211_sta_send_apinfo(sdata);
 924                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
 925                                 sdata->local->hw.conf.channel->center_freq,
 926                                 ifmgd->ssid, ifmgd->ssid_len);
 927
 928                 /*
 929                  * We might have a pending scan which had no chance to run yet
 930                  * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
 931                  * Hence, queue the STAs work again
 932                  */
 933                 queue_work(local->hw.workqueue, &ifmgd->work);
 934                 return;
 935         }
 936
 937         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
 938         printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
 939                sdata->dev->name, ifmgd->bssid);
 940
 941         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
 942                 ies = ifmgd->sme_auth_ie;
 943                 ies_len = ifmgd->sme_auth_ie_len;
 944         } else {
 945                 ies = NULL;
 946                 ies_len = 0;
 947         }
 948         ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
 949                             ifmgd->bssid, 0);
 950         ifmgd->auth_transaction = 2;
 951
 952         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 953 }
 954
 955 /*
 956  * The disassoc 'reason' argument can be either our own reason
 957  * if self disconnected or a reason code from the AP.
 958  */
 959 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 960                                    bool deauth, bool self_disconnected,
 961                                    u16 reason)
 962 {
 963         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 964         struct ieee80211_local *local = sdata->local;
 965         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 966         struct ieee80211_bss *bss;
 967         struct sta_info *sta;
 968         u32 changed = 0, config_changed = 0;
 969
 970         rcu_read_lock();
 971
 972         sta = sta_info_get(local, ifmgd->bssid);
 973         if (!sta) {
 974                 rcu_read_unlock();
 975                 return;
 976         }
 977
 978         if (deauth) {
 979                 ifmgd->direct_probe_tries = 0;
 980                 ifmgd->auth_tries = 0;
 981         }
 982         ifmgd->assoc_scan_tries = 0;
 983         ifmgd->assoc_tries = 0;
 984
 985         netif_tx_stop_all_queues(sdata->dev);
 986         netif_carrier_off(sdata->dev);
 987
 988         ieee80211_sta_tear_down_BA_sessions(sta);
 989
 990         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 991                                    conf->channel->center_freq,
 992                                    ifmgd->ssid, ifmgd->ssid_len);
 993
 994         if (bss) {
 995                 cfg80211_unhold_bss(&bss->cbss);
 996                 ieee80211_rx_bss_put(local, bss);
 997         }
 998
 999         if (self_disconnected) {
1000                 if (deauth)
1001                         ieee80211_send_deauth_disassoc(sdata,
1002                                 IEEE80211_STYPE_DEAUTH, reason);
1003                 else
1004                         ieee80211_send_deauth_disassoc(sdata,
1005                                 IEEE80211_STYPE_DISASSOC, reason);
1006         }
1007
1008         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1009         changed |= ieee80211_reset_erp_info(sdata);
1010
1011         ieee80211_led_assoc(local, 0);
1012         changed |= BSS_CHANGED_ASSOC;
1013         sdata->vif.bss_conf.assoc = false;
1014
1015         ieee80211_sta_send_apinfo(sdata);
1016
1017         if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1018                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1019                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1020                                 sdata->local->hw.conf.channel->center_freq,
1021                                 ifmgd->ssid, ifmgd->ssid_len);
1022         }
1023
1024         rcu_read_unlock();
1025
1026         /* channel(_type) changes are handled by ieee80211_hw_config */
1027         local->oper_channel_type = NL80211_CHAN_NO_HT;
1028
1029         local->power_constr_level = 0;
1030
1031         del_timer_sync(&local->dynamic_ps_timer);
1032         cancel_work_sync(&local->dynamic_ps_enable_work);
1033
1034         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1035                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1036                 config_changed |= IEEE80211_CONF_CHANGE_PS;
1037         }
1038
1039         ieee80211_hw_config(local, config_changed);
1040         ieee80211_bss_info_change_notify(sdata, changed);
1041
1042         rcu_read_lock();
1043
1044         sta = sta_info_get(local, ifmgd->bssid);
1045         if (!sta) {
1046                 rcu_read_unlock();
1047                 return;
1048         }
1049
1050         sta_info_unlink(&sta);
1051
1052         rcu_read_unlock();
1053
1054         sta_info_destroy(sta);
1055 }
1056
1057 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1058 {
1059         if (!sdata || !sdata->default_key ||
1060             sdata->default_key->conf.alg != ALG_WEP)
1061                 return 0;
1062         return 1;
1063 }
1064
1065 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1066 {
1067         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1068         struct ieee80211_local *local = sdata->local;
1069         struct ieee80211_bss *bss;
1070         int bss_privacy;
1071         int wep_privacy;
1072         int privacy_invoked;
1073
1074         if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1075                 return 0;
1076
1077         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1078                                    local->hw.conf.channel->center_freq,
1079                                    ifmgd->ssid, ifmgd->ssid_len);
1080         if (!bss)
1081                 return 0;
1082
1083         bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1084         wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1085         privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1086
1087         ieee80211_rx_bss_put(local, bss);
1088
1089         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1090                 return 0;
1091
1092         return 1;
1093 }
1094
1095 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1096 {
1097         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1098         struct ieee80211_local *local = sdata->local;
1099
1100         ifmgd->assoc_tries++;
1101         if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1102                 printk(KERN_DEBUG "%s: association with AP %pM"
1103                        " timed out\n",
1104                        sdata->dev->name, ifmgd->bssid);
1105                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1106                 ieee80211_sta_send_apinfo(sdata);
1107                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1108                                 sdata->local->hw.conf.channel->center_freq,
1109                                 ifmgd->ssid, ifmgd->ssid_len);
1110                 /*
1111                  * We might have a pending scan which had no chance to run yet
1112                  * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1113                  * Hence, queue the STAs work again
1114                  */
1115                 queue_work(local->hw.workqueue, &ifmgd->work);
1116                 return;
1117         }
1118
1119         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1120         printk(KERN_DEBUG "%s: associate with AP %pM\n",
1121                sdata->dev->name, ifmgd->bssid);
1122         if (ieee80211_privacy_mismatch(sdata)) {
1123                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1124                        "mixed-cell disabled - abort association\n", sdata->dev->name);
1125                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1126                 return;
1127         }
1128
1129         ieee80211_send_assoc(sdata);
1130
1131         mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1132 }
1133
1134 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1135                              struct ieee80211_hdr *hdr)
1136 {
1137         /*
1138          * We can postpone the mgd.timer whenever receiving unicast frames
1139          * from AP because we know that the connection is working both ways
1140          * at that time. But multicast frames (and hence also beacons) must
1141          * be ignored here, because we need to trigger the timer during
1142          * data idle periods for sending the periodical probe request to
1143          * the AP.
1144          */
1145         if (!is_multicast_ether_addr(hdr->addr1))
1146                 mod_timer(&sdata->u.mgd.timer,
1147                           jiffies + IEEE80211_MONITORING_INTERVAL);
1148 }
1149
1150 void ieee80211_beacon_loss_work(struct work_struct *work)
1151 {
1152         struct ieee80211_sub_if_data *sdata =
1153                 container_of(work, struct ieee80211_sub_if_data,
1154                              u.mgd.beacon_loss_work);
1155         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1156
1157 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1158         if (net_ratelimit()) {
1159                 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1160                        "- sending probe request\n", sdata->dev->name,
1161                        sdata->u.mgd.bssid);
1162         }
1163 #endif
1164
1165         ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1166         ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1167                                  ifmgd->ssid_len, NULL, 0);
1168
1169         mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1170 }
1171
1172 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1173 {
1174         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1175
1176         queue_work(sdata->local->hw.workqueue,
1177                    &sdata->u.mgd.beacon_loss_work);
1178 }
1179 EXPORT_SYMBOL(ieee80211_beacon_loss);
1180
1181 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1182 {
1183         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1184         struct ieee80211_local *local = sdata->local;
1185         struct sta_info *sta;
1186         bool disassoc = false;
1187
1188         /* TODO: start monitoring current AP signal quality and number of
1189          * missed beacons. Scan other channels every now and then and search
1190          * for better APs. */
1191         /* TODO: remove expired BSSes */
1192
1193         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1194
1195         rcu_read_lock();
1196
1197         sta = sta_info_get(local, ifmgd->bssid);
1198         if (!sta) {
1199                 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1200                        sdata->dev->name, ifmgd->bssid);
1201                 disassoc = true;
1202                 goto unlock;
1203         }
1204
1205         if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1206             time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1207                 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1208                        "- disassociating\n",
1209                        sdata->dev->name, ifmgd->bssid);
1210                 disassoc = true;
1211                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1212                 goto unlock;
1213         }
1214
1215         /*
1216          * Beacon filtering is only enabled with power save and then the
1217          * stack should not check for beacon loss.
1218          */
1219         if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1220               (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1221             time_after(jiffies,
1222                        ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1223 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1224                 if (net_ratelimit()) {
1225                         printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1226                                "- sending probe request\n",
1227                                sdata->dev->name, ifmgd->bssid);
1228                 }
1229 #endif
1230                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1231                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1232                                          ifmgd->ssid_len, NULL, 0);
1233                 goto unlock;
1234
1235         }
1236
1237         if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1238                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1239                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1240                                          ifmgd->ssid_len, NULL, 0);
1241         }
1242
1243  unlock:
1244         rcu_read_unlock();
1245
1246         if (disassoc)
1247                 ieee80211_set_disassoc(sdata, true, true,
1248                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1249         else
1250                 mod_timer(&ifmgd->timer, jiffies +
1251                                       IEEE80211_MONITORING_INTERVAL);
1252 }
1253
1254
1255 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1256 {
1257         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1258
1259         printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1260         ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1261         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1262                 /* Wait for SME to request association */
1263                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1264         } else
1265                 ieee80211_associate(sdata);
1266 }
1267
1268
1269 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1270                                      struct ieee80211_mgmt *mgmt,
1271                                      size_t len)
1272 {
1273         u8 *pos;
1274         struct ieee802_11_elems elems;
1275
1276         pos = mgmt->u.auth.variable;
1277         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1278         if (!elems.challenge)
1279                 return;
1280         ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1281                             elems.challenge - 2, elems.challenge_len + 2,
1282                             sdata->u.mgd.bssid, 1);
1283         sdata->u.mgd.auth_transaction = 4;
1284 }
1285
1286 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1287                                    struct ieee80211_mgmt *mgmt,
1288                                    size_t len)
1289 {
1290         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1291         u16 auth_alg, auth_transaction, status_code;
1292
1293         if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1294                 return;
1295
1296         if (len < 24 + 6)
1297                 return;
1298
1299         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1300                 return;
1301
1302         if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1303                 return;
1304
1305         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1306         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1307         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1308
1309         if (auth_alg != ifmgd->auth_alg ||
1310             auth_transaction != ifmgd->auth_transaction)
1311                 return;
1312
1313         if (status_code != WLAN_STATUS_SUCCESS) {
1314                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1315                         u8 algs[3];
1316                         const int num_algs = ARRAY_SIZE(algs);
1317                         int i, pos;
1318                         algs[0] = algs[1] = algs[2] = 0xff;
1319                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1320                                 algs[0] = WLAN_AUTH_OPEN;
1321                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1322                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1323                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1324                                 algs[2] = WLAN_AUTH_LEAP;
1325                         if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1326                                 pos = 0;
1327                         else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1328                                 pos = 1;
1329                         else
1330                                 pos = 2;
1331                         for (i = 0; i < num_algs; i++) {
1332                                 pos++;
1333                                 if (pos >= num_algs)
1334                                         pos = 0;
1335                                 if (algs[pos] == ifmgd->auth_alg ||
1336                                     algs[pos] == 0xff)
1337                                         continue;
1338                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1339                                     !ieee80211_sta_wep_configured(sdata))
1340                                         continue;
1341                                 ifmgd->auth_alg = algs[pos];
1342                                 break;
1343                         }
1344                 }
1345                 return;
1346         }
1347
1348         switch (ifmgd->auth_alg) {
1349         case WLAN_AUTH_OPEN:
1350         case WLAN_AUTH_LEAP:
1351         case WLAN_AUTH_FT:
1352                 ieee80211_auth_completed(sdata);
1353                 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1354                 break;
1355         case WLAN_AUTH_SHARED_KEY:
1356                 if (ifmgd->auth_transaction == 4) {
1357                         ieee80211_auth_completed(sdata);
1358                         cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1359                 } else
1360                         ieee80211_auth_challenge(sdata, mgmt, len);
1361                 break;
1362         }
1363 }
1364
1365
1366 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1367                                      struct ieee80211_mgmt *mgmt,
1368                                      size_t len)
1369 {
1370         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1371         u16 reason_code;
1372
1373         if (len < 24 + 2)
1374                 return;
1375
1376         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1377                 return;
1378
1379         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1380
1381         if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1382                 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1383                                 sdata->dev->name, reason_code);
1384
1385         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1386             (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1387              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1388              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1389                 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1390                 mod_timer(&ifmgd->timer, jiffies +
1391                                       IEEE80211_RETRY_AUTH_INTERVAL);
1392         }
1393
1394         ieee80211_set_disassoc(sdata, true, false, 0);
1395         ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1396         cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1397 }
1398
1399
1400 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1401                                        struct ieee80211_mgmt *mgmt,
1402                                        size_t len)
1403 {
1404         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1405         u16 reason_code;
1406
1407         if (len < 24 + 2)
1408                 return;
1409
1410         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1411                 return;
1412
1413         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1414
1415         if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1416                 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1417                                 sdata->dev->name, reason_code);
1418
1419         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1420             ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1421                 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1422                 mod_timer(&ifmgd->timer, jiffies +
1423                                       IEEE80211_RETRY_AUTH_INTERVAL);
1424         }
1425
1426         ieee80211_set_disassoc(sdata, false, false, reason_code);
1427         cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1428 }
1429
1430
1431 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1432                                          struct ieee80211_mgmt *mgmt,
1433                                          size_t len,
1434                                          int reassoc)
1435 {
1436         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1437         struct ieee80211_local *local = sdata->local;
1438         struct ieee80211_supported_band *sband;
1439         struct sta_info *sta;
1440         u32 rates, basic_rates;
1441         u16 capab_info, status_code, aid;
1442         struct ieee802_11_elems elems;
1443         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1444         u8 *pos;
1445         u32 changed = 0;
1446         int i, j;
1447         bool have_higher_than_11mbit = false, newsta = false;
1448         u16 ap_ht_cap_flags;
1449
1450         /* AssocResp and ReassocResp have identical structure, so process both
1451          * of them in this function. */
1452
1453         if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1454                 return;
1455
1456         if (len < 24 + 6)
1457                 return;
1458
1459         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1460                 return;
1461
1462         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1463         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1464         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1465
1466         printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1467                "status=%d aid=%d)\n",
1468                sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1469                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1470
1471         pos = mgmt->u.assoc_resp.variable;
1472         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1473
1474         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1475             elems.timeout_int && elems.timeout_int_len == 5 &&
1476             elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1477                 u32 tu, ms;
1478                 tu = get_unaligned_le32(elems.timeout_int + 1);
1479                 ms = tu * 1024 / 1000;
1480                 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1481                        "comeback duration %u TU (%u ms)\n",
1482                        sdata->dev->name, tu, ms);
1483                 if (ms > IEEE80211_ASSOC_TIMEOUT)
1484                         mod_timer(&ifmgd->timer,
1485                                   jiffies + msecs_to_jiffies(ms));
1486                 return;
1487         }
1488
1489         if (status_code != WLAN_STATUS_SUCCESS) {
1490                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1491                        sdata->dev->name, status_code);
1492                 /* if this was a reassociation, ensure we try a "full"
1493                  * association next time. This works around some broken APs
1494                  * which do not correctly reject reassociation requests. */
1495                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1496                 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1497                 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1498                         /* Wait for SME to decide what to do next */
1499                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1500                 }
1501                 return;
1502         }
1503
1504         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1505                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1506                        "set\n", sdata->dev->name, aid);
1507         aid &= ~(BIT(15) | BIT(14));
1508
1509         if (!elems.supp_rates) {
1510                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1511                        sdata->dev->name);
1512                 return;
1513         }
1514
1515         printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1516         ifmgd->aid = aid;
1517         ifmgd->ap_capab = capab_info;
1518
1519         kfree(ifmgd->assocresp_ies);
1520         ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1521         ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1522         if (ifmgd->assocresp_ies)
1523                 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1524
1525         rcu_read_lock();
1526
1527         /* Add STA entry for the AP */
1528         sta = sta_info_get(local, ifmgd->bssid);
1529         if (!sta) {
1530                 newsta = true;
1531
1532                 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1533                 if (!sta) {
1534                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1535                                " the AP\n", sdata->dev->name);
1536                         rcu_read_unlock();
1537                         return;
1538                 }
1539
1540                 /* update new sta with its last rx activity */
1541                 sta->last_rx = jiffies;
1542         }
1543
1544         /*
1545          * FIXME: Do we really need to update the sta_info's information here?
1546          *        We already know about the AP (we found it in our list) so it
1547          *        should already be filled with the right info, no?
1548          *        As is stands, all this is racy because typically we assume
1549          *        the information that is filled in here (except flags) doesn't
1550          *        change while a STA structure is alive. As such, it should move
1551          *        to between the sta_info_alloc() and sta_info_insert() above.
1552          */
1553
1554         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1555                            WLAN_STA_AUTHORIZED);
1556
1557         rates = 0;
1558         basic_rates = 0;
1559         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1560
1561         for (i = 0; i < elems.supp_rates_len; i++) {
1562                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1563                 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1564
1565                 if (rate > 110)
1566                         have_higher_than_11mbit = true;
1567
1568                 for (j = 0; j < sband->n_bitrates; j++) {
1569                         if (sband->bitrates[j].bitrate == rate) {
1570                                 rates |= BIT(j);
1571                                 if (is_basic)
1572                                         basic_rates |= BIT(j);
1573                                 break;
1574                         }
1575                 }
1576         }
1577
1578         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1579                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1580                 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1581
1582                 if (rate > 110)
1583                         have_higher_than_11mbit = true;
1584
1585                 for (j = 0; j < sband->n_bitrates; j++) {
1586                         if (sband->bitrates[j].bitrate == rate) {
1587                                 rates |= BIT(j);
1588                                 if (is_basic)
1589                                         basic_rates |= BIT(j);
1590                                 break;
1591                         }
1592                 }
1593         }
1594
1595         sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1596         sdata->vif.bss_conf.basic_rates = basic_rates;
1597
1598         /* cf. IEEE 802.11 9.2.12 */
1599         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1600             have_higher_than_11mbit)
1601                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1602         else
1603                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1604
1605         /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1606         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1607                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1608                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1609
1610         ap_ht_cap_flags = sta->sta.ht_cap.cap;
1611
1612         rate_control_rate_init(sta);
1613
1614         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1615                 set_sta_flags(sta, WLAN_STA_MFP);
1616
1617         if (elems.wmm_param)
1618                 set_sta_flags(sta, WLAN_STA_WME);
1619
1620         if (newsta) {
1621                 int err = sta_info_insert(sta);
1622                 if (err) {
1623                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1624                                " the AP (error %d)\n", sdata->dev->name, err);
1625                         rcu_read_unlock();
1626                         return;
1627                 }
1628         }
1629
1630         rcu_read_unlock();
1631
1632         if (elems.wmm_param)
1633                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1634                                          elems.wmm_param_len);
1635
1636         if (elems.ht_info_elem && elems.wmm_param &&
1637             (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1638             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1639                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1640                                                ap_ht_cap_flags);
1641
1642         /* set AID and assoc capability,
1643          * ieee80211_set_associated() will tell the driver */
1644         bss_conf->aid = aid;
1645         bss_conf->assoc_capability = capab_info;
1646         ieee80211_set_associated(sdata, changed);
1647
1648         /*
1649          * initialise the time of last beacon to be the association time,
1650          * otherwise beacon loss check will trigger immediately
1651          */
1652         ifmgd->last_beacon = jiffies;
1653
1654         ieee80211_associated(sdata);
1655         cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1656 }
1657
1658
1659 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1660                                   struct ieee80211_mgmt *mgmt,
1661                                   size_t len,
1662                                   struct ieee80211_rx_status *rx_status,
1663                                   struct ieee802_11_elems *elems,
1664                                   bool beacon)
1665 {
1666         struct ieee80211_local *local = sdata->local;
1667         int freq;
1668         struct ieee80211_bss *bss;
1669         struct ieee80211_channel *channel;
1670
1671         if (elems->ds_params && elems->ds_params_len == 1)
1672                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1673         else
1674                 freq = rx_status->freq;
1675
1676         channel = ieee80211_get_channel(local->hw.wiphy, freq);
1677
1678         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1679                 return;
1680
1681         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1682                                         channel, beacon);
1683         if (!bss)
1684                 return;
1685
1686         if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1687             (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1688                 struct ieee80211_channel_sw_ie *sw_elem =
1689                         (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1690                 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1691         }
1692
1693         ieee80211_rx_bss_put(local, bss);
1694 }
1695
1696
1697 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1698                                          struct ieee80211_mgmt *mgmt,
1699                                          size_t len,
1700                                          struct ieee80211_rx_status *rx_status)
1701 {
1702         struct ieee80211_if_managed *ifmgd;
1703         size_t baselen;
1704         struct ieee802_11_elems elems;
1705
1706         ifmgd = &sdata->u.mgd;
1707
1708         if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1709                 return; /* ignore ProbeResp to foreign address */
1710
1711         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1712         if (baselen > len)
1713                 return;
1714
1715         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1716                                 &elems);
1717
1718         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1719
1720         /* direct probe may be part of the association flow */
1721         if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1722                                &ifmgd->request)) {
1723                 printk(KERN_DEBUG "%s direct probe responded\n",
1724                        sdata->dev->name);
1725                 ieee80211_authenticate(sdata);
1726         }
1727
1728         if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1729                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1730 }
1731
1732 /*
1733  * This is the canonical list of information elements we care about,
1734  * the filter code also gives us all changes to the Microsoft OUI
1735  * (00:50:F2) vendor IE which is used for WMM which we need to track.
1736  *
1737  * We implement beacon filtering in software since that means we can
1738  * avoid processing the frame here and in cfg80211, and userspace
1739  * will not be able to tell whether the hardware supports it or not.
1740  *
1741  * XXX: This list needs to be dynamic -- userspace needs to be able to
1742  *      add items it requires. It also needs to be able to tell us to
1743  *      look out for other vendor IEs.
1744  */
1745 static const u64 care_about_ies =
1746         BIT(WLAN_EID_COUNTRY) |
1747         BIT(WLAN_EID_ERP_INFO) |
1748         BIT(WLAN_EID_CHANNEL_SWITCH) |
1749         BIT(WLAN_EID_PWR_CONSTRAINT) |
1750         BIT(WLAN_EID_HT_CAPABILITY) |
1751         BIT(WLAN_EID_HT_INFORMATION);
1752
1753 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1754                                      struct ieee80211_mgmt *mgmt,
1755                                      size_t len,
1756                                      struct ieee80211_rx_status *rx_status)
1757 {
1758         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1759         size_t baselen;
1760         struct ieee802_11_elems elems;
1761         struct ieee80211_local *local = sdata->local;
1762         u32 changed = 0;
1763         bool erp_valid, directed_tim = false;
1764         u8 erp_value = 0;
1765         u32 ncrc;
1766
1767         /* Process beacon from the current BSS */
1768         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1769         if (baselen > len)
1770                 return;
1771
1772         if (rx_status->freq != local->hw.conf.channel->center_freq)
1773                 return;
1774
1775         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1776             memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1777                 return;
1778
1779         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1780         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1781                                           len - baselen, &elems,
1782                                           care_about_ies, ncrc);
1783
1784         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1785                 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1786                                                    ifmgd->aid);
1787
1788         ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1789
1790         if (ncrc == ifmgd->beacon_crc)
1791                 return;
1792         ifmgd->beacon_crc = ncrc;
1793
1794         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1795
1796         ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1797                                  elems.wmm_param_len);
1798
1799         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1800                 if (directed_tim) {
1801                         if (local->hw.conf.dynamic_ps_timeout > 0) {
1802                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1803                                 ieee80211_hw_config(local,
1804                                                     IEEE80211_CONF_CHANGE_PS);
1805                                 ieee80211_send_nullfunc(local, sdata, 0);
1806                         } else {
1807                                 local->pspolling = true;
1808
1809                                 /*
1810                                  * Here is assumed that the driver will be
1811                                  * able to send ps-poll frame and receive a
1812                                  * response even though power save mode is
1813                                  * enabled, but some drivers might require
1814                                  * to disable power save here. This needs
1815                                  * to be investigated.
1816                                  */
1817                                 ieee80211_send_pspoll(local, sdata);
1818                         }
1819                 }
1820         }
1821
1822         if (elems.erp_info && elems.erp_info_len >= 1) {
1823                 erp_valid = true;
1824                 erp_value = elems.erp_info[0];
1825         } else {
1826                 erp_valid = false;
1827         }
1828         changed |= ieee80211_handle_bss_capability(sdata,
1829                         le16_to_cpu(mgmt->u.beacon.capab_info),
1830                         erp_valid, erp_value);
1831
1832
1833         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1834             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1835                 struct sta_info *sta;
1836                 struct ieee80211_supported_band *sband;
1837                 u16 ap_ht_cap_flags;
1838
1839                 rcu_read_lock();
1840
1841                 sta = sta_info_get(local, ifmgd->bssid);
1842                 if (!sta) {
1843                         rcu_read_unlock();
1844                         return;
1845                 }
1846
1847                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1848
1849                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1850                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1851
1852                 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1853
1854                 rcu_read_unlock();
1855
1856                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1857                                                ap_ht_cap_flags);
1858         }
1859
1860         if (elems.country_elem) {
1861                 /* Note we are only reviewing this on beacons
1862                  * for the BSSID we are associated to */
1863                 regulatory_hint_11d(local->hw.wiphy,
1864                         elems.country_elem, elems.country_elem_len);
1865
1866                 /* TODO: IBSS also needs this */
1867                 if (elems.pwr_constr_elem)
1868                         ieee80211_handle_pwr_constr(sdata,
1869                                 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1870                                 elems.pwr_constr_elem,
1871                                 elems.pwr_constr_elem_len);
1872         }
1873
1874         ieee80211_bss_info_change_notify(sdata, changed);
1875 }
1876
1877 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1878                                           struct sk_buff *skb,
1879                                           struct ieee80211_rx_status *rx_status)
1880 {
1881         struct ieee80211_local *local = sdata->local;
1882         struct ieee80211_mgmt *mgmt;
1883         u16 fc;
1884
1885         if (skb->len < 24)
1886                 return RX_DROP_MONITOR;
1887
1888         mgmt = (struct ieee80211_mgmt *) skb->data;
1889         fc = le16_to_cpu(mgmt->frame_control);
1890
1891         switch (fc & IEEE80211_FCTL_STYPE) {
1892         case IEEE80211_STYPE_PROBE_REQ:
1893         case IEEE80211_STYPE_PROBE_RESP:
1894         case IEEE80211_STYPE_BEACON:
1895                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1896         case IEEE80211_STYPE_AUTH:
1897         case IEEE80211_STYPE_ASSOC_RESP:
1898         case IEEE80211_STYPE_REASSOC_RESP:
1899         case IEEE80211_STYPE_DEAUTH:
1900         case IEEE80211_STYPE_DISASSOC:
1901                 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1902                 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1903                 return RX_QUEUED;
1904         }
1905
1906         return RX_DROP_MONITOR;
1907 }
1908
1909 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1910                                          struct sk_buff *skb)
1911 {
1912         struct ieee80211_rx_status *rx_status;
1913         struct ieee80211_mgmt *mgmt;
1914         u16 fc;
1915
1916         rx_status = (struct ieee80211_rx_status *) skb->cb;
1917         mgmt = (struct ieee80211_mgmt *) skb->data;
1918         fc = le16_to_cpu(mgmt->frame_control);
1919
1920         switch (fc & IEEE80211_FCTL_STYPE) {
1921         case IEEE80211_STYPE_PROBE_RESP:
1922                 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1923                                              rx_status);
1924                 break;
1925         case IEEE80211_STYPE_BEACON:
1926                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1927                                          rx_status);
1928                 break;
1929         case IEEE80211_STYPE_AUTH:
1930                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1931                 break;
1932         case IEEE80211_STYPE_ASSOC_RESP:
1933                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1934                 break;
1935         case IEEE80211_STYPE_REASSOC_RESP:
1936                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1937                 break;
1938         case IEEE80211_STYPE_DEAUTH:
1939                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1940                 break;
1941         case IEEE80211_STYPE_DISASSOC:
1942                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1943                 break;
1944         }
1945
1946         kfree_skb(skb);
1947 }
1948
1949 static void ieee80211_sta_timer(unsigned long data)
1950 {
1951         struct ieee80211_sub_if_data *sdata =
1952                 (struct ieee80211_sub_if_data *) data;
1953         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1954         struct ieee80211_local *local = sdata->local;
1955
1956         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1957         queue_work(local->hw.workqueue, &ifmgd->work);
1958 }
1959
1960 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1961 {
1962         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1963         struct ieee80211_local *local = sdata->local;
1964
1965         if (local->ops->reset_tsf) {
1966                 /* Reset own TSF to allow time synchronization work. */
1967                 local->ops->reset_tsf(local_to_hw(local));
1968         }
1969
1970         ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1971
1972
1973         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1974                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1975         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1976                 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1977         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1978                 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1979         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1980                 ifmgd->auth_alg = WLAN_AUTH_FT;
1981         else
1982                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1983         ifmgd->auth_transaction = -1;
1984         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1985         ifmgd->assoc_scan_tries = 0;
1986         ifmgd->direct_probe_tries = 0;
1987         ifmgd->auth_tries = 0;
1988         ifmgd->assoc_tries = 0;
1989         netif_tx_stop_all_queues(sdata->dev);
1990         netif_carrier_off(sdata->dev);
1991 }
1992
1993 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1994 {
1995         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1996         struct ieee80211_local *local = sdata->local;
1997         struct ieee80211_bss *bss;
1998         u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1999         u8 ssid_len = ifmgd->ssid_len;
2000         u16 capa_mask = WLAN_CAPABILITY_ESS;
2001         u16 capa_val = WLAN_CAPABILITY_ESS;
2002         struct ieee80211_channel *chan = local->oper_channel;
2003
2004         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2005             ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2006                             IEEE80211_STA_AUTO_BSSID_SEL |
2007                             IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2008                 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2009                 if (sdata->default_key)
2010                         capa_val |= WLAN_CAPABILITY_PRIVACY;
2011         }
2012
2013         if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2014                 chan = NULL;
2015
2016         if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2017                 bssid = NULL;
2018
2019         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2020                 ssid = NULL;
2021                 ssid_len = 0;
2022         }
2023
2024         bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2025                                        bssid, ssid, ssid_len,
2026                                        capa_mask, capa_val);
2027
2028         if (bss) {
2029                 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2030                 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2031                         ieee80211_sta_set_ssid(sdata, bss->ssid,
2032                                                bss->ssid_len);
2033                 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2034                 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2035                                                     bss->supp_rates);
2036                 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2037                         sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2038                 else
2039                         sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2040
2041                 /* Send out direct probe if no probe resp was received or
2042                  * the one we have is outdated
2043                  */
2044                 if (!bss->last_probe_resp ||
2045                     time_after(jiffies, bss->last_probe_resp
2046                                         + IEEE80211_SCAN_RESULT_EXPIRE))
2047                         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2048                 else
2049                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2050
2051                 ieee80211_rx_bss_put(local, bss);
2052                 ieee80211_sta_reset_auth(sdata);
2053                 return 0;
2054         } else {
2055                 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2056                         ifmgd->assoc_scan_tries++;
2057                         /* XXX maybe racy? */
2058                         if (local->scan_req)
2059                                 return -1;
2060                         memcpy(local->int_scan_req.ssids[0].ssid,
2061                                ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
2062                         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
2063                                 local->int_scan_req.ssids[0].ssid_len = 0;
2064                         else
2065                                 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
2066
2067                         if (ieee80211_start_scan(sdata, &local->int_scan_req))
2068                                 ieee80211_scan_failed(local);
2069
2070                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2071                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2072                 } else {
2073                         ifmgd->assoc_scan_tries = 0;
2074                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2075                 }
2076         }
2077         return -1;
2078 }
2079
2080
2081 static void ieee80211_sta_work(struct work_struct *work)
2082 {
2083         struct ieee80211_sub_if_data *sdata =
2084                 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2085         struct ieee80211_local *local = sdata->local;
2086         struct ieee80211_if_managed *ifmgd;
2087         struct sk_buff *skb;
2088
2089         if (!netif_running(sdata->dev))
2090                 return;
2091
2092         if (local->sw_scanning || local->hw_scanning)
2093                 return;
2094
2095         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2096                 return;
2097         ifmgd = &sdata->u.mgd;
2098
2099         while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2100                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2101
2102         if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2103             ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2104             ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2105             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2106                 /*
2107                  * The call to ieee80211_start_scan can fail but ieee80211_request_scan
2108                  * (which queued ieee80211_sta_work) did not return an error. Thus, call
2109                  * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
2110                  * notify the scan requester.
2111                  */
2112                 if (ieee80211_start_scan(sdata, local->scan_req))
2113                         ieee80211_scan_failed(local);
2114                 return;
2115         }
2116
2117         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2118                 if (ieee80211_sta_config_auth(sdata))
2119                         return;
2120                 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2121         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2122                 return;
2123
2124         switch (ifmgd->state) {
2125         case IEEE80211_STA_MLME_DISABLED:
2126                 break;
2127         case IEEE80211_STA_MLME_DIRECT_PROBE:
2128                 ieee80211_direct_probe(sdata);
2129                 break;
2130         case IEEE80211_STA_MLME_AUTHENTICATE:
2131                 ieee80211_authenticate(sdata);
2132                 break;
2133         case IEEE80211_STA_MLME_ASSOCIATE:
2134                 ieee80211_associate(sdata);
2135                 break;
2136         case IEEE80211_STA_MLME_ASSOCIATED:
2137                 ieee80211_associated(sdata);
2138                 break;
2139         default:
2140                 WARN_ON(1);
2141                 break;
2142         }
2143
2144         if (ieee80211_privacy_mismatch(sdata)) {
2145                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2146                        "mixed-cell disabled - disassociate\n", sdata->dev->name);
2147
2148                 ieee80211_set_disassoc(sdata, false, true,
2149                                         WLAN_REASON_UNSPECIFIED);
2150         }
2151 }
2152
2153 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2154 {
2155         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2156                 /*
2157                  * Need to update last_beacon to avoid beacon loss
2158                  * test to trigger.
2159                  */
2160                 sdata->u.mgd.last_beacon = jiffies;
2161
2162
2163                 queue_work(sdata->local->hw.workqueue,
2164                            &sdata->u.mgd.work);
2165         }
2166 }
2167
2168 /* interface setup */
2169 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2170 {
2171         struct ieee80211_if_managed *ifmgd;
2172         u32 hw_flags;
2173
2174         ifmgd = &sdata->u.mgd;
2175         INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2176         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2177         INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2178         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2179                     (unsigned long) sdata);
2180         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2181                     (unsigned long) sdata);
2182         skb_queue_head_init(&ifmgd->skb_queue);
2183
2184         ifmgd->capab = WLAN_CAPABILITY_ESS;
2185         ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2186                 IEEE80211_AUTH_ALG_SHARED_KEY;
2187         ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2188                 IEEE80211_STA_AUTO_BSSID_SEL |
2189                 IEEE80211_STA_AUTO_CHANNEL_SEL;
2190         if (sdata->local->hw.queues >= 4)
2191                 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2192
2193         hw_flags = sdata->local->hw.flags;
2194
2195         if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2196                 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2197                 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2198         }
2199 }
2200
2201 /* configuration hooks */
2202 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2203 {
2204         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2205         struct ieee80211_local *local = sdata->local;
2206
2207         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2208                 return;
2209
2210         if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2211                              IEEE80211_STA_AUTO_BSSID_SEL)) &&
2212             (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2213                              IEEE80211_STA_AUTO_SSID_SEL))) {
2214
2215                 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2216                         ieee80211_set_disassoc(sdata, true, true,
2217                                                WLAN_REASON_DEAUTH_LEAVING);
2218
2219                 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2220                     ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2221                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2222                 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2223                         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2224                 queue_work(local->hw.workqueue, &ifmgd->work);
2225         }
2226 }
2227
2228 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2229 {
2230         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2231
2232         if (ifmgd->ssid_len)
2233                 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2234         else
2235                 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2236
2237         return 0;
2238 }
2239
2240 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2241 {
2242         struct ieee80211_if_managed *ifmgd;
2243
2244         if (len > IEEE80211_MAX_SSID_LEN)
2245                 return -EINVAL;
2246
2247         ifmgd = &sdata->u.mgd;
2248
2249         if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2250                 /*
2251                  * Do not use reassociation if SSID is changed (different ESS).
2252                  */
2253                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2254                 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2255                 memcpy(ifmgd->ssid, ssid, len);
2256                 ifmgd->ssid_len = len;
2257         }
2258
2259         return ieee80211_sta_commit(sdata);
2260 }
2261
2262 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2263 {
2264         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2265         memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2266         *len = ifmgd->ssid_len;
2267         return 0;
2268 }
2269
2270 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2271 {
2272         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2273
2274         if (is_valid_ether_addr(bssid)) {
2275                 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2276                 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2277         } else {
2278                 memset(ifmgd->bssid, 0, ETH_ALEN);
2279                 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2280         }
2281
2282         if (netif_running(sdata->dev)) {
2283                 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2284                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2285                                "the low-level driver\n", sdata->dev->name);
2286                 }
2287         }
2288
2289         return ieee80211_sta_commit(sdata);
2290 }
2291
2292 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2293                                const char *ie, size_t len)
2294 {
2295         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2296
2297         kfree(ifmgd->extra_ie);
2298         if (len == 0) {
2299                 ifmgd->extra_ie = NULL;
2300                 ifmgd->extra_ie_len = 0;
2301                 return 0;
2302         }
2303         ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2304         if (!ifmgd->extra_ie) {
2305                 ifmgd->extra_ie_len = 0;
2306                 return -ENOMEM;
2307         }
2308         memcpy(ifmgd->extra_ie, ie, len);
2309         ifmgd->extra_ie_len = len;
2310         return 0;
2311 }
2312
2313 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2314 {
2315         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2316                sdata->dev->name, reason);
2317
2318         ieee80211_set_disassoc(sdata, true, true, reason);
2319         return 0;
2320 }
2321
2322 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2323 {
2324         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2325
2326         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2327                sdata->dev->name, reason);
2328
2329         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2330                 return -ENOLINK;
2331
2332         ieee80211_set_disassoc(sdata, false, true, reason);
2333         return 0;
2334 }
2335
2336 /* scan finished notification */
2337 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2338 {
2339         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2340
2341         /* Restart STA timers */
2342         rcu_read_lock();
2343         list_for_each_entry_rcu(sdata, &local->interfaces, list)
2344                 ieee80211_restart_sta_timer(sdata);
2345         rcu_read_unlock();
2346 }
2347
2348 int ieee80211_max_network_latency(struct notifier_block *nb,
2349                                   unsigned long data, void *dummy)
2350 {
2351         s32 latency_usec = (s32) data;
2352         struct ieee80211_local *local =
2353                 container_of(nb, struct ieee80211_local,
2354                              network_latency_notifier);
2355
2356         mutex_lock(&local->iflist_mtx);
2357         ieee80211_recalc_ps(local, latency_usec);
2358         mutex_unlock(&local->iflist_mtx);
2359
2360         return 0;
2361 }