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 <net/mac80211.h>
  21 #include <asm/unaligned.h>
  22
  23 #include "ieee80211_i.h"
  24 #include "rate.h"
  25 #include "led.h"
  26
  27 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
  28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  29 #define IEEE80211_AUTH_MAX_TRIES 3
  30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  31 #define IEEE80211_ASSOC_MAX_TRIES 3
  32 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  33 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
  34 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  35
  36 /* utils */
  37 static int ecw2cw(int ecw)
  38 {
  39         return (1 << ecw) - 1;
  40 }
  41
  42 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
  43 {
  44         u8 *end, *pos;
  45
  46         pos = bss->cbss.information_elements;
  47         if (pos == NULL)
  48                 return NULL;
  49         end = pos + bss->cbss.len_information_elements;
  50
  51         while (pos + 1 < end) {
  52                 if (pos + 2 + pos[1] > end)
  53                         break;
  54                 if (pos[0] == ie)
  55                         return pos;
  56                 pos += 2 + pos[1];
  57         }
  58
  59         return NULL;
  60 }
  61
  62 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
  63                                       struct ieee80211_supported_band *sband,
  64                                       u32 *rates)
  65 {
  66         int i, j, count;
  67         *rates = 0;
  68         count = 0;
  69         for (i = 0; i < bss->supp_rates_len; i++) {
  70                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
  71
  72                 for (j = 0; j < sband->n_bitrates; j++)
  73                         if (sband->bitrates[j].bitrate == rate) {
  74                                 *rates |= BIT(j);
  75                                 count++;
  76                                 break;
  77                         }
  78         }
  79
  80         return count;
  81 }
  82
  83 /* frame sending functions */
  84
  85 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
  86 {
  87         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
  88         struct ieee80211_local *local = sdata->local;
  89         struct sk_buff *skb;
  90         struct ieee80211_mgmt *mgmt;
  91         u8 *pos, *ies, *ht_ie;
  92         int i, len, count, rates_len, supp_rates_len;
  93         u16 capab;
  94         struct ieee80211_bss *bss;
  95         int wmm = 0;
  96         struct ieee80211_supported_band *sband;
  97         u32 rates = 0;
  98
  99         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 100                             sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
 101                             ifmgd->ssid_len);
 102         if (!skb) {
 103                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 104                        "frame\n", sdata->dev->name);
 105                 return;
 106         }
 107         skb_reserve(skb, local->hw.extra_tx_headroom);
 108
 109         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 110
 111         capab = ifmgd->capab;
 112
 113         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 114                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 115                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 116                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 117                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 118         }
 119
 120         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 121                                    local->hw.conf.channel->center_freq,
 122                                    ifmgd->ssid, ifmgd->ssid_len);
 123         if (bss) {
 124                 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
 125                         capab |= WLAN_CAPABILITY_PRIVACY;
 126                 if (bss->wmm_used)
 127                         wmm = 1;
 128
 129                 /* get all rates supported by the device and the AP as
 130                  * some APs don't like getting a superset of their rates
 131                  * in the association request (e.g. D-Link DAP 1353 in
 132                  * b-only mode) */
 133                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 134
 135                 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 136                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 137                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 138
 139                 ieee80211_rx_bss_put(local, bss);
 140         } else {
 141                 rates = ~0;
 142                 rates_len = sband->n_bitrates;
 143         }
 144
 145         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 146         memset(mgmt, 0, 24);
 147         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
 148         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 149         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
 150
 151         if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
 152                 skb_put(skb, 10);
 153                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 154                                                   IEEE80211_STYPE_REASSOC_REQ);
 155                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 156                 mgmt->u.reassoc_req.listen_interval =
 157                                 cpu_to_le16(local->hw.conf.listen_interval);
 158                 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
 159                        ETH_ALEN);
 160         } else {
 161                 skb_put(skb, 4);
 162                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 163                                                   IEEE80211_STYPE_ASSOC_REQ);
 164                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 165                 mgmt->u.assoc_req.listen_interval =
 166                                 cpu_to_le16(local->hw.conf.listen_interval);
 167         }
 168
 169         /* SSID */
 170         ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
 171         *pos++ = WLAN_EID_SSID;
 172         *pos++ = ifmgd->ssid_len;
 173         memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
 174
 175         /* add all rates which were marked to be used above */
 176         supp_rates_len = rates_len;
 177         if (supp_rates_len > 8)
 178                 supp_rates_len = 8;
 179
 180         len = sband->n_bitrates;
 181         pos = skb_put(skb, supp_rates_len + 2);
 182         *pos++ = WLAN_EID_SUPP_RATES;
 183         *pos++ = supp_rates_len;
 184
 185         count = 0;
 186         for (i = 0; i < sband->n_bitrates; i++) {
 187                 if (BIT(i) & rates) {
 188                         int rate = sband->bitrates[i].bitrate;
 189                         *pos++ = (u8) (rate / 5);
 190                         if (++count == 8)
 191                                 break;
 192                 }
 193         }
 194
 195         if (rates_len > count) {
 196                 pos = skb_put(skb, rates_len - count + 2);
 197                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 198                 *pos++ = rates_len - count;
 199
 200                 for (i++; i < sband->n_bitrates; i++) {
 201                         if (BIT(i) & rates) {
 202                                 int rate = sband->bitrates[i].bitrate;
 203                                 *pos++ = (u8) (rate / 5);
 204                         }
 205                 }
 206         }
 207
 208         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 209                 /* 1. power capabilities */
 210                 pos = skb_put(skb, 4);
 211                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 212                 *pos++ = 2;
 213                 *pos++ = 0; /* min tx power */
 214                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 215
 216                 /* 2. supported channels */
 217                 /* TODO: get this in reg domain format */
 218                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 219                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 220                 *pos++ = 2 * sband->n_channels;
 221                 for (i = 0; i < sband->n_channels; i++) {
 222                         *pos++ = ieee80211_frequency_to_channel(
 223                                         sband->channels[i].center_freq);
 224                         *pos++ = 1; /* one channel in the subband*/
 225                 }
 226         }
 227
 228         if (ifmgd->extra_ie) {
 229                 pos = skb_put(skb, ifmgd->extra_ie_len);
 230                 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
 231         }
 232
 233         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
 234                 pos = skb_put(skb, 9);
 235                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 236                 *pos++ = 7; /* len */
 237                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 238                 *pos++ = 0x50;
 239                 *pos++ = 0xf2;
 240                 *pos++ = 2; /* WME */
 241                 *pos++ = 0; /* WME info */
 242                 *pos++ = 1; /* WME ver */
 243                 *pos++ = 0;
 244         }
 245
 246         /* wmm support is a must to HT */
 247         /*
 248          * IEEE802.11n does not allow TKIP/WEP as pairwise
 249          * ciphers in HT mode. We still associate in non-ht
 250          * mode (11a/b/g) if any one of these ciphers is
 251          * configured as pairwise.
 252          */
 253         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
 254             sband->ht_cap.ht_supported &&
 255             (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
 256             ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
 257             (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
 258                 struct ieee80211_ht_info *ht_info =
 259                         (struct ieee80211_ht_info *)(ht_ie + 2);
 260                 u16 cap = sband->ht_cap.cap;
 261                 __le16 tmp;
 262                 u32 flags = local->hw.conf.channel->flags;
 263
 264                 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 265                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 266                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 267                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 268                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 269                         }
 270                         break;
 271                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 272                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 273                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 274                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 275                         }
 276                         break;
 277                 }
 278
 279                 tmp = cpu_to_le16(cap);
 280                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 281                 *pos++ = WLAN_EID_HT_CAPABILITY;
 282                 *pos++ = sizeof(struct ieee80211_ht_cap);
 283                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 284                 memcpy(pos, &tmp, sizeof(u16));
 285                 pos += sizeof(u16);
 286                 /* TODO: needs a define here for << 2 */
 287                 *pos++ = sband->ht_cap.ampdu_factor |
 288                          (sband->ht_cap.ampdu_density << 2);
 289                 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
 290         }
 291
 292         kfree(ifmgd->assocreq_ies);
 293         ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
 294         ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
 295         if (ifmgd->assocreq_ies)
 296                 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
 297
 298         ieee80211_tx_skb(sdata, skb, 0);
 299 }
 300
 301
 302 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
 303                                            u16 stype, u16 reason)
 304 {
 305         struct ieee80211_local *local = sdata->local;
 306         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 307         struct sk_buff *skb;
 308         struct ieee80211_mgmt *mgmt;
 309
 310         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 311         if (!skb) {
 312                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
 313                        "deauth/disassoc frame\n", sdata->dev->name);
 314                 return;
 315         }
 316         skb_reserve(skb, local->hw.extra_tx_headroom);
 317
 318         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 319         memset(mgmt, 0, 24);
 320         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
 321         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 322         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
 323         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
 324         skb_put(skb, 2);
 325         /* u.deauth.reason_code == u.disassoc.reason_code */
 326         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 327
 328         ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
 329 }
 330
 331 void ieee80211_send_pspoll(struct ieee80211_local *local,
 332                            struct ieee80211_sub_if_data *sdata)
 333 {
 334         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 335         struct ieee80211_pspoll *pspoll;
 336         struct sk_buff *skb;
 337         u16 fc;
 338
 339         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
 340         if (!skb) {
 341                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
 342                        "pspoll frame\n", sdata->dev->name);
 343                 return;
 344         }
 345         skb_reserve(skb, local->hw.extra_tx_headroom);
 346
 347         pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
 348         memset(pspoll, 0, sizeof(*pspoll));
 349         fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
 350         pspoll->frame_control = cpu_to_le16(fc);
 351         pspoll->aid = cpu_to_le16(ifmgd->aid);
 352
 353         /* aid in PS-Poll has its two MSBs each set to 1 */
 354         pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
 355
 356         memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
 357         memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
 358
 359         ieee80211_tx_skb(sdata, skb, 0);
 360 }
 361
 362 /* MLME */
 363 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
 364                                      struct ieee80211_if_managed *ifmgd,
 365                                      u8 *wmm_param, size_t wmm_param_len)
 366 {
 367         struct ieee80211_tx_queue_params params;
 368         size_t left;
 369         int count;
 370         u8 *pos;
 371
 372         if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
 373                 return;
 374
 375         if (!wmm_param)
 376                 return;
 377
 378         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 379                 return;
 380         count = wmm_param[6] & 0x0f;
 381         if (count == ifmgd->wmm_last_param_set)
 382                 return;
 383         ifmgd->wmm_last_param_set = count;
 384
 385         pos = wmm_param + 8;
 386         left = wmm_param_len - 8;
 387
 388         memset(&params, 0, sizeof(params));
 389
 390         local->wmm_acm = 0;
 391         for (; left >= 4; left -= 4, pos += 4) {
 392                 int aci = (pos[0] >> 5) & 0x03;
 393                 int acm = (pos[0] >> 4) & 0x01;
 394                 int queue;
 395
 396                 switch (aci) {
 397                 case 1: /* AC_BK */
 398                         queue = 3;
 399                         if (acm)
 400                                 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
 401                         break;
 402                 case 2: /* AC_VI */
 403                         queue = 1;
 404                         if (acm)
 405                                 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
 406                         break;
 407                 case 3: /* AC_VO */
 408                         queue = 0;
 409                         if (acm)
 410                                 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
 411                         break;
 412                 case 0: /* AC_BE */
 413                 default:
 414                         queue = 2;
 415                         if (acm)
 416                                 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
 417                         break;
 418                 }
 419
 420                 params.aifs = pos[0] & 0x0f;
 421                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 422                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 423                 params.txop = get_unaligned_le16(pos + 2);
 424 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 425                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 426                        "cWmin=%d cWmax=%d txop=%d\n",
 427                        local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
 428                        params.cw_max, params.txop);
 429 #endif
 430                 if (local->ops->conf_tx &&
 431                     local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 432                         printk(KERN_DEBUG "%s: failed to set TX queue "
 433                                "parameters for queue %d\n", local->mdev->name, queue);
 434                 }
 435         }
 436 }
 437
 438 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
 439 {
 440         u8 mask;
 441         u8 index, indexn1, indexn2;
 442         struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
 443
 444         aid &= 0x3fff;
 445         index = aid / 8;
 446         mask  = 1 << (aid & 7);
 447
 448         indexn1 = tim->bitmap_ctrl & 0xfe;
 449         indexn2 = elems->tim_len + indexn1 - 4;
 450
 451         if (index < indexn1 || index > indexn2)
 452                 return false;
 453
 454         index -= indexn1;
 455
 456         return !!(tim->virtual_map[index] & mask);
 457 }
 458
 459 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 460                                            u16 capab, bool erp_valid, u8 erp)
 461 {
 462         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 463 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 464         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 465 #endif
 466         u32 changed = 0;
 467         bool use_protection;
 468         bool use_short_preamble;
 469         bool use_short_slot;
 470
 471         if (erp_valid) {
 472                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
 473                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
 474         } else {
 475                 use_protection = false;
 476                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
 477         }
 478
 479         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
 480
 481         if (use_protection != bss_conf->use_cts_prot) {
 482 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 483                 if (net_ratelimit()) {
 484                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
 485                                sdata->dev->name,
 486                                use_protection ? "enabled" : "disabled",
 487                                ifmgd->bssid);
 488                 }
 489 #endif
 490                 bss_conf->use_cts_prot = use_protection;
 491                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 492         }
 493
 494         if (use_short_preamble != bss_conf->use_short_preamble) {
 495 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 496                 if (net_ratelimit()) {
 497                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 498                                " (BSSID=%pM)\n",
 499                                sdata->dev->name,
 500                                use_short_preamble ? "short" : "long",
 501                                ifmgd->bssid);
 502                 }
 503 #endif
 504                 bss_conf->use_short_preamble = use_short_preamble;
 505                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 506         }
 507
 508         if (use_short_slot != bss_conf->use_short_slot) {
 509 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 510                 if (net_ratelimit()) {
 511                         printk(KERN_DEBUG "%s: switched to %s slot time"
 512                                " (BSSID=%pM)\n",
 513                                sdata->dev->name,
 514                                use_short_slot ? "short" : "long",
 515                                ifmgd->bssid);
 516                 }
 517 #endif
 518                 bss_conf->use_short_slot = use_short_slot;
 519                 changed |= BSS_CHANGED_ERP_SLOT;
 520         }
 521
 522         return changed;
 523 }
 524
 525 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
 526 {
 527         union iwreq_data wrqu;
 528
 529         memset(&wrqu, 0, sizeof(wrqu));
 530         if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
 531                 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
 532         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 533         wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
 534 }
 535
 536 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
 537 {
 538         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 539         char *buf;
 540         size_t len;
 541         int i;
 542         union iwreq_data wrqu;
 543
 544         if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
 545                 return;
 546
 547         buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
 548                                 ifmgd->assocresp_ies_len), GFP_KERNEL);
 549         if (!buf)
 550                 return;
 551
 552         len = sprintf(buf, "ASSOCINFO(");
 553         if (ifmgd->assocreq_ies) {
 554                 len += sprintf(buf + len, "ReqIEs=");
 555                 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
 556                         len += sprintf(buf + len, "%02x",
 557                                        ifmgd->assocreq_ies[i]);
 558                 }
 559         }
 560         if (ifmgd->assocresp_ies) {
 561                 if (ifmgd->assocreq_ies)
 562                         len += sprintf(buf + len, " ");
 563                 len += sprintf(buf + len, "RespIEs=");
 564                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
 565                         len += sprintf(buf + len, "%02x",
 566                                        ifmgd->assocresp_ies[i]);
 567                 }
 568         }
 569         len += sprintf(buf + len, ")");
 570
 571         if (len > IW_CUSTOM_MAX) {
 572                 len = sprintf(buf, "ASSOCRESPIE=");
 573                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
 574                         len += sprintf(buf + len, "%02x",
 575                                        ifmgd->assocresp_ies[i]);
 576                 }
 577         }
 578
 579         if (len <= IW_CUSTOM_MAX) {
 580                 memset(&wrqu, 0, sizeof(wrqu));
 581                 wrqu.data.length = len;
 582                 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
 583         }
 584
 585         kfree(buf);
 586 }
 587
 588
 589 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 590                                      u32 bss_info_changed)
 591 {
 592         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 593         struct ieee80211_local *local = sdata->local;
 594         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 595
 596         struct ieee80211_bss *bss;
 597
 598         bss_info_changed |= BSS_CHANGED_ASSOC;
 599         ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
 600
 601         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 602                                    conf->channel->center_freq,
 603                                    ifmgd->ssid, ifmgd->ssid_len);
 604         if (bss) {
 605                 /* set timing information */
 606                 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
 607                 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
 608                 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
 609
 610                 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
 611                         bss->cbss.capability, bss->has_erp_value, bss->erp_value);
 612
 613                 cfg80211_hold_bss(&bss->cbss);
 614
 615                 ieee80211_rx_bss_put(local, bss);
 616         }
 617
 618         ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
 619         memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
 620         ieee80211_sta_send_associnfo(sdata);
 621
 622         ifmgd->last_probe = jiffies;
 623         ieee80211_led_assoc(local, 1);
 624
 625         sdata->vif.bss_conf.assoc = 1;
 626         /*
 627          * For now just always ask the driver to update the basic rateset
 628          * when we have associated, we aren't checking whether it actually
 629          * changed or not.
 630          */
 631         bss_info_changed |= BSS_CHANGED_BASIC_RATES;
 632         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
 633
 634         if (local->powersave) {
 635                 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
 636                     local->hw.conf.dynamic_ps_timeout > 0) {
 637                         mod_timer(&local->dynamic_ps_timer, jiffies +
 638                                   msecs_to_jiffies(
 639                                         local->hw.conf.dynamic_ps_timeout));
 640                 } else {
 641                         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 642                                 ieee80211_send_nullfunc(local, sdata, 1);
 643                         conf->flags |= IEEE80211_CONF_PS;
 644                         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
 645                 }
 646         }
 647
 648         netif_tx_start_all_queues(sdata->dev);
 649         netif_carrier_on(sdata->dev);
 650
 651         ieee80211_sta_send_apinfo(sdata);
 652 }
 653
 654 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
 655 {
 656         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 657         struct ieee80211_local *local = sdata->local;
 658
 659         ifmgd->direct_probe_tries++;
 660         if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
 661                 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
 662                        sdata->dev->name, ifmgd->bssid);
 663                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
 664                 ieee80211_sta_send_apinfo(sdata);
 665
 666                 /*
 667                  * Most likely AP is not in the range so remove the
 668                  * bss information associated to the AP
 669                  */
 670                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
 671                                 sdata->local->hw.conf.channel->center_freq,
 672                                 ifmgd->ssid, ifmgd->ssid_len);
 673
 674                 /*
 675                  * We might have a pending scan which had no chance to run yet
 676                  * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
 677                  * Hence, queue the STAs work again
 678                  */
 679                 queue_work(local->hw.workqueue, &ifmgd->work);
 680                 return;
 681         }
 682
 683         printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
 684                         sdata->dev->name, ifmgd->bssid,
 685                         ifmgd->direct_probe_tries);
 686
 687         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
 688
 689         set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
 690
 691         /* Direct probe is sent to broadcast address as some APs
 692          * will not answer to direct packet in unassociated state.
 693          */
 694         ieee80211_send_probe_req(sdata, NULL,
 695                                  ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
 696
 697         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 698 }
 699
 700
 701 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
 702 {
 703         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 704         struct ieee80211_local *local = sdata->local;
 705         u8 *ies;
 706         size_t ies_len;
 707
 708         ifmgd->auth_tries++;
 709         if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 710                 printk(KERN_DEBUG "%s: authentication with AP %pM"
 711                        " timed out\n",
 712                        sdata->dev->name, ifmgd->bssid);
 713                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
 714                 ieee80211_sta_send_apinfo(sdata);
 715                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
 716                                 sdata->local->hw.conf.channel->center_freq,
 717                                 ifmgd->ssid, ifmgd->ssid_len);
 718
 719                 /*
 720                  * We might have a pending scan which had no chance to run yet
 721                  * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
 722                  * Hence, queue the STAs work again
 723                  */
 724                 queue_work(local->hw.workqueue, &ifmgd->work);
 725                 return;
 726         }
 727
 728         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
 729         printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
 730                sdata->dev->name, ifmgd->bssid);
 731
 732         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
 733                 ies = ifmgd->sme_auth_ie;
 734                 ies_len = ifmgd->sme_auth_ie_len;
 735         } else {
 736                 ies = NULL;
 737                 ies_len = 0;
 738         }
 739         ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
 740                             ifmgd->bssid, 0);
 741         ifmgd->auth_transaction = 2;
 742
 743         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 744 }
 745
 746 /*
 747  * The disassoc 'reason' argument can be either our own reason
 748  * if self disconnected or a reason code from the AP.
 749  */
 750 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 751                                    bool deauth, bool self_disconnected,
 752                                    u16 reason)
 753 {
 754         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 755         struct ieee80211_local *local = sdata->local;
 756         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 757         struct ieee80211_bss *bss;
 758         struct sta_info *sta;
 759         u32 changed = 0, config_changed = 0;
 760
 761         rcu_read_lock();
 762
 763         sta = sta_info_get(local, ifmgd->bssid);
 764         if (!sta) {
 765                 rcu_read_unlock();
 766                 return;
 767         }
 768
 769         if (deauth) {
 770                 ifmgd->direct_probe_tries = 0;
 771                 ifmgd->auth_tries = 0;
 772         }
 773         ifmgd->assoc_scan_tries = 0;
 774         ifmgd->assoc_tries = 0;
 775
 776         netif_tx_stop_all_queues(sdata->dev);
 777         netif_carrier_off(sdata->dev);
 778
 779         ieee80211_sta_tear_down_BA_sessions(sta);
 780
 781         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 782                                    conf->channel->center_freq,
 783                                    ifmgd->ssid, ifmgd->ssid_len);
 784
 785         if (bss) {
 786                 cfg80211_unhold_bss(&bss->cbss);
 787                 ieee80211_rx_bss_put(local, bss);
 788         }
 789
 790         if (self_disconnected) {
 791                 if (deauth)
 792                         ieee80211_send_deauth_disassoc(sdata,
 793                                 IEEE80211_STYPE_DEAUTH, reason);
 794                 else
 795                         ieee80211_send_deauth_disassoc(sdata,
 796                                 IEEE80211_STYPE_DISASSOC, reason);
 797         }
 798
 799         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
 800         changed |= ieee80211_reset_erp_info(sdata);
 801
 802         ieee80211_led_assoc(local, 0);
 803         changed |= BSS_CHANGED_ASSOC;
 804         sdata->vif.bss_conf.assoc = false;
 805
 806         ieee80211_sta_send_apinfo(sdata);
 807
 808         if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
 809                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
 810                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
 811                                 sdata->local->hw.conf.channel->center_freq,
 812                                 ifmgd->ssid, ifmgd->ssid_len);
 813         }
 814
 815         rcu_read_unlock();
 816
 817         /* channel(_type) changes are handled by ieee80211_hw_config */
 818         local->oper_channel_type = NL80211_CHAN_NO_HT;
 819
 820         local->power_constr_level = 0;
 821
 822         del_timer_sync(&local->dynamic_ps_timer);
 823         cancel_work_sync(&local->dynamic_ps_enable_work);
 824
 825         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
 826                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
 827                 config_changed |= IEEE80211_CONF_CHANGE_PS;
 828         }
 829
 830         ieee80211_hw_config(local, config_changed);
 831         ieee80211_bss_info_change_notify(sdata, changed);
 832
 833         rcu_read_lock();
 834
 835         sta = sta_info_get(local, ifmgd->bssid);
 836         if (!sta) {
 837                 rcu_read_unlock();
 838                 return;
 839         }
 840
 841         sta_info_unlink(&sta);
 842
 843         rcu_read_unlock();
 844
 845         sta_info_destroy(sta);
 846 }
 847
 848 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
 849 {
 850         if (!sdata || !sdata->default_key ||
 851             sdata->default_key->conf.alg != ALG_WEP)
 852                 return 0;
 853         return 1;
 854 }
 855
 856 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
 857 {
 858         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 859         struct ieee80211_local *local = sdata->local;
 860         struct ieee80211_bss *bss;
 861         int bss_privacy;
 862         int wep_privacy;
 863         int privacy_invoked;
 864
 865         if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
 866                 return 0;
 867
 868         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
 869                                    local->hw.conf.channel->center_freq,
 870                                    ifmgd->ssid, ifmgd->ssid_len);
 871         if (!bss)
 872                 return 0;
 873
 874         bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
 875         wep_privacy = !!ieee80211_sta_wep_configured(sdata);
 876         privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
 877
 878         ieee80211_rx_bss_put(local, bss);
 879
 880         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 881                 return 0;
 882
 883         return 1;
 884 }
 885
 886 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
 887 {
 888         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 889         struct ieee80211_local *local = sdata->local;
 890
 891         ifmgd->assoc_tries++;
 892         if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 893                 printk(KERN_DEBUG "%s: association with AP %pM"
 894                        " timed out\n",
 895                        sdata->dev->name, ifmgd->bssid);
 896                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
 897                 ieee80211_sta_send_apinfo(sdata);
 898                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
 899                                 sdata->local->hw.conf.channel->center_freq,
 900                                 ifmgd->ssid, ifmgd->ssid_len);
 901                 /*
 902                  * We might have a pending scan which had no chance to run yet
 903                  * due to state == IEEE80211_STA_MLME_ASSOCIATE.
 904                  * Hence, queue the STAs work again
 905                  */
 906                 queue_work(local->hw.workqueue, &ifmgd->work);
 907                 return;
 908         }
 909
 910         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
 911         printk(KERN_DEBUG "%s: associate with AP %pM\n",
 912                sdata->dev->name, ifmgd->bssid);
 913         if (ieee80211_privacy_mismatch(sdata)) {
 914                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 915                        "mixed-cell disabled - abort association\n", sdata->dev->name);
 916                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
 917                 return;
 918         }
 919
 920         ieee80211_send_assoc(sdata);
 921
 922         mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 923 }
 924
 925 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
 926                              struct ieee80211_hdr *hdr)
 927 {
 928         /*
 929          * We can postpone the mgd.timer whenever receiving unicast frames
 930          * from AP because we know that the connection is working both ways
 931          * at that time. But multicast frames (and hence also beacons) must
 932          * be ignored here, because we need to trigger the timer during
 933          * data idle periods for sending the periodical probe request to
 934          * the AP.
 935          */
 936         if (!is_multicast_ether_addr(hdr->addr1))
 937                 mod_timer(&sdata->u.mgd.timer,
 938                           jiffies + IEEE80211_MONITORING_INTERVAL);
 939 }
 940
 941 void ieee80211_beacon_loss_work(struct work_struct *work)
 942 {
 943         struct ieee80211_sub_if_data *sdata =
 944                 container_of(work, struct ieee80211_sub_if_data,
 945                              u.mgd.beacon_loss_work);
 946         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 947
 948         printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
 949                "- sending probe request\n", sdata->dev->name,
 950                sdata->u.mgd.bssid);
 951
 952         ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
 953         ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
 954                                  ifmgd->ssid_len, NULL, 0);
 955
 956         mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
 957 }
 958
 959 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
 960 {
 961         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 962
 963         queue_work(sdata->local->hw.workqueue,
 964                    &sdata->u.mgd.beacon_loss_work);
 965 }
 966 EXPORT_SYMBOL(ieee80211_beacon_loss);
 967
 968 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
 969 {
 970         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 971         struct ieee80211_local *local = sdata->local;
 972         struct sta_info *sta;
 973         bool disassoc = false;
 974
 975         /* TODO: start monitoring current AP signal quality and number of
 976          * missed beacons. Scan other channels every now and then and search
 977          * for better APs. */
 978         /* TODO: remove expired BSSes */
 979
 980         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
 981
 982         rcu_read_lock();
 983
 984         sta = sta_info_get(local, ifmgd->bssid);
 985         if (!sta) {
 986                 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
 987                        sdata->dev->name, ifmgd->bssid);
 988                 disassoc = true;
 989                 goto unlock;
 990         }
 991
 992         if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
 993             time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 994                 printk(KERN_DEBUG "%s: no probe response from AP %pM "
 995                        "- disassociating\n",
 996                        sdata->dev->name, ifmgd->bssid);
 997                 disassoc = true;
 998                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 999                 goto unlock;
1000         }
1001
1002         /*
1003          * Beacon filtering is only enabled with power save and then the
1004          * stack should not check for beacon loss.
1005          */
1006         if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1007               (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1008             time_after(jiffies,
1009                        ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1010                 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1011                        "- sending probe request\n",
1012                        sdata->dev->name, ifmgd->bssid);
1013                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1014                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1015                                          ifmgd->ssid_len, NULL, 0);
1016                 goto unlock;
1017
1018         }
1019
1020         if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1021                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1022                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1023                                          ifmgd->ssid_len, NULL, 0);
1024         }
1025
1026  unlock:
1027         rcu_read_unlock();
1028
1029         if (disassoc)
1030                 ieee80211_set_disassoc(sdata, true, true,
1031                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1032         else
1033                 mod_timer(&ifmgd->timer, jiffies +
1034                                       IEEE80211_MONITORING_INTERVAL);
1035 }
1036
1037
1038 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1039 {
1040         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1041
1042         printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1043         ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1044         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1045                 /* Wait for SME to request association */
1046                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1047         } else
1048                 ieee80211_associate(sdata);
1049 }
1050
1051
1052 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1053                                      struct ieee80211_mgmt *mgmt,
1054                                      size_t len)
1055 {
1056         u8 *pos;
1057         struct ieee802_11_elems elems;
1058
1059         pos = mgmt->u.auth.variable;
1060         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1061         if (!elems.challenge)
1062                 return;
1063         ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1064                             elems.challenge - 2, elems.challenge_len + 2,
1065                             sdata->u.mgd.bssid, 1);
1066         sdata->u.mgd.auth_transaction = 4;
1067 }
1068
1069 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1070                                    struct ieee80211_mgmt *mgmt,
1071                                    size_t len)
1072 {
1073         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1074         u16 auth_alg, auth_transaction, status_code;
1075
1076         if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1077                 return;
1078
1079         if (len < 24 + 6)
1080                 return;
1081
1082         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1083                 return;
1084
1085         if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1086                 return;
1087
1088         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1089         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1090         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1091
1092         if (auth_alg != ifmgd->auth_alg ||
1093             auth_transaction != ifmgd->auth_transaction)
1094                 return;
1095
1096         if (status_code != WLAN_STATUS_SUCCESS) {
1097                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1098                         u8 algs[3];
1099                         const int num_algs = ARRAY_SIZE(algs);
1100                         int i, pos;
1101                         algs[0] = algs[1] = algs[2] = 0xff;
1102                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1103                                 algs[0] = WLAN_AUTH_OPEN;
1104                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1105                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1106                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1107                                 algs[2] = WLAN_AUTH_LEAP;
1108                         if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1109                                 pos = 0;
1110                         else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1111                                 pos = 1;
1112                         else
1113                                 pos = 2;
1114                         for (i = 0; i < num_algs; i++) {
1115                                 pos++;
1116                                 if (pos >= num_algs)
1117                                         pos = 0;
1118                                 if (algs[pos] == ifmgd->auth_alg ||
1119                                     algs[pos] == 0xff)
1120                                         continue;
1121                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1122                                     !ieee80211_sta_wep_configured(sdata))
1123                                         continue;
1124                                 ifmgd->auth_alg = algs[pos];
1125                                 break;
1126                         }
1127                 }
1128                 return;
1129         }
1130
1131         switch (ifmgd->auth_alg) {
1132         case WLAN_AUTH_OPEN:
1133         case WLAN_AUTH_LEAP:
1134         case WLAN_AUTH_FT:
1135                 ieee80211_auth_completed(sdata);
1136                 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1137                 break;
1138         case WLAN_AUTH_SHARED_KEY:
1139                 if (ifmgd->auth_transaction == 4) {
1140                         ieee80211_auth_completed(sdata);
1141                         cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1142                 } else
1143                         ieee80211_auth_challenge(sdata, mgmt, len);
1144                 break;
1145         }
1146 }
1147
1148
1149 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1150                                      struct ieee80211_mgmt *mgmt,
1151                                      size_t len)
1152 {
1153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1154         u16 reason_code;
1155
1156         if (len < 24 + 2)
1157                 return;
1158
1159         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1160                 return;
1161
1162         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1163
1164         if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1165                 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1166                                 sdata->dev->name, reason_code);
1167
1168         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1169             (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1170              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1171              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1172                 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1173                 mod_timer(&ifmgd->timer, jiffies +
1174                                       IEEE80211_RETRY_AUTH_INTERVAL);
1175         }
1176
1177         ieee80211_set_disassoc(sdata, true, false, 0);
1178         ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1179         cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1180 }
1181
1182
1183 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1184                                        struct ieee80211_mgmt *mgmt,
1185                                        size_t len)
1186 {
1187         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1188         u16 reason_code;
1189
1190         if (len < 24 + 2)
1191                 return;
1192
1193         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1194                 return;
1195
1196         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1197
1198         if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1199                 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1200                                 sdata->dev->name, reason_code);
1201
1202         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1203             ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1204                 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1205                 mod_timer(&ifmgd->timer, jiffies +
1206                                       IEEE80211_RETRY_AUTH_INTERVAL);
1207         }
1208
1209         ieee80211_set_disassoc(sdata, false, false, reason_code);
1210         cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1211 }
1212
1213
1214 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1215                                          struct ieee80211_mgmt *mgmt,
1216                                          size_t len,
1217                                          int reassoc)
1218 {
1219         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1220         struct ieee80211_local *local = sdata->local;
1221         struct ieee80211_supported_band *sband;
1222         struct sta_info *sta;
1223         u32 rates, basic_rates;
1224         u16 capab_info, status_code, aid;
1225         struct ieee802_11_elems elems;
1226         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1227         u8 *pos;
1228         u32 changed = 0;
1229         int i, j;
1230         bool have_higher_than_11mbit = false, newsta = false;
1231         u16 ap_ht_cap_flags;
1232
1233         /* AssocResp and ReassocResp have identical structure, so process both
1234          * of them in this function. */
1235
1236         if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1237                 return;
1238
1239         if (len < 24 + 6)
1240                 return;
1241
1242         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1243                 return;
1244
1245         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1246         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1247         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1248
1249         printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1250                "status=%d aid=%d)\n",
1251                sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1252                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1253
1254         pos = mgmt->u.assoc_resp.variable;
1255         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1256
1257         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1258             elems.timeout_int && elems.timeout_int_len == 5 &&
1259             elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1260                 u32 tu, ms;
1261                 tu = get_unaligned_le32(elems.timeout_int + 1);
1262                 ms = tu * 1024 / 1000;
1263                 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1264                        "comeback duration %u TU (%u ms)\n",
1265                        sdata->dev->name, tu, ms);
1266                 if (ms > IEEE80211_ASSOC_TIMEOUT)
1267                         mod_timer(&ifmgd->timer,
1268                                   jiffies + msecs_to_jiffies(ms));
1269                 return;
1270         }
1271
1272         if (status_code != WLAN_STATUS_SUCCESS) {
1273                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1274                        sdata->dev->name, status_code);
1275                 /* if this was a reassociation, ensure we try a "full"
1276                  * association next time. This works around some broken APs
1277                  * which do not correctly reject reassociation requests. */
1278                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1279                 return;
1280         }
1281
1282         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1283                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1284                        "set\n", sdata->dev->name, aid);
1285         aid &= ~(BIT(15) | BIT(14));
1286
1287         if (!elems.supp_rates) {
1288                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1289                        sdata->dev->name);
1290                 return;
1291         }
1292
1293         printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1294         ifmgd->aid = aid;
1295         ifmgd->ap_capab = capab_info;
1296
1297         kfree(ifmgd->assocresp_ies);
1298         ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1299         ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1300         if (ifmgd->assocresp_ies)
1301                 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1302
1303         rcu_read_lock();
1304
1305         /* Add STA entry for the AP */
1306         sta = sta_info_get(local, ifmgd->bssid);
1307         if (!sta) {
1308                 newsta = true;
1309
1310                 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1311                 if (!sta) {
1312                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1313                                " the AP\n", sdata->dev->name);
1314                         rcu_read_unlock();
1315                         return;
1316                 }
1317
1318                 /* update new sta with its last rx activity */
1319                 sta->last_rx = jiffies;
1320         }
1321
1322         /*
1323          * FIXME: Do we really need to update the sta_info's information here?
1324          *        We already know about the AP (we found it in our list) so it
1325          *        should already be filled with the right info, no?
1326          *        As is stands, all this is racy because typically we assume
1327          *        the information that is filled in here (except flags) doesn't
1328          *        change while a STA structure is alive. As such, it should move
1329          *        to between the sta_info_alloc() and sta_info_insert() above.
1330          */
1331
1332         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1333                            WLAN_STA_AUTHORIZED);
1334
1335         rates = 0;
1336         basic_rates = 0;
1337         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1338
1339         for (i = 0; i < elems.supp_rates_len; i++) {
1340                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1341                 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1342
1343                 if (rate > 110)
1344                         have_higher_than_11mbit = true;
1345
1346                 for (j = 0; j < sband->n_bitrates; j++) {
1347                         if (sband->bitrates[j].bitrate == rate) {
1348                                 rates |= BIT(j);
1349                                 if (is_basic)
1350                                         basic_rates |= BIT(j);
1351                                 break;
1352                         }
1353                 }
1354         }
1355
1356         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1357                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1358                 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1359
1360                 if (rate > 110)
1361                         have_higher_than_11mbit = true;
1362
1363                 for (j = 0; j < sband->n_bitrates; j++) {
1364                         if (sband->bitrates[j].bitrate == rate) {
1365                                 rates |= BIT(j);
1366                                 if (is_basic)
1367                                         basic_rates |= BIT(j);
1368                                 break;
1369                         }
1370                 }
1371         }
1372
1373         sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1374         sdata->vif.bss_conf.basic_rates = basic_rates;
1375
1376         /* cf. IEEE 802.11 9.2.12 */
1377         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1378             have_higher_than_11mbit)
1379                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1380         else
1381                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1382
1383         /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1384         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1385                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1386                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1387
1388         ap_ht_cap_flags = sta->sta.ht_cap.cap;
1389
1390         rate_control_rate_init(sta);
1391
1392         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1393                 set_sta_flags(sta, WLAN_STA_MFP);
1394
1395         if (elems.wmm_param)
1396                 set_sta_flags(sta, WLAN_STA_WME);
1397
1398         if (newsta) {
1399                 int err = sta_info_insert(sta);
1400                 if (err) {
1401                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1402                                " the AP (error %d)\n", sdata->dev->name, err);
1403                         rcu_read_unlock();
1404                         return;
1405                 }
1406         }
1407
1408         rcu_read_unlock();
1409
1410         if (elems.wmm_param)
1411                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1412                                          elems.wmm_param_len);
1413
1414         if (elems.ht_info_elem && elems.wmm_param &&
1415             (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1416             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1417                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1418                                                ap_ht_cap_flags);
1419
1420         /* set AID and assoc capability,
1421          * ieee80211_set_associated() will tell the driver */
1422         bss_conf->aid = aid;
1423         bss_conf->assoc_capability = capab_info;
1424         ieee80211_set_associated(sdata, changed);
1425
1426         /*
1427          * initialise the time of last beacon to be the association time,
1428          * otherwise beacon loss check will trigger immediately
1429          */
1430         ifmgd->last_beacon = jiffies;
1431
1432         ieee80211_associated(sdata);
1433         cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1434 }
1435
1436
1437 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1438                                   struct ieee80211_mgmt *mgmt,
1439                                   size_t len,
1440                                   struct ieee80211_rx_status *rx_status,
1441                                   struct ieee802_11_elems *elems,
1442                                   bool beacon)
1443 {
1444         struct ieee80211_local *local = sdata->local;
1445         int freq;
1446         struct ieee80211_bss *bss;
1447         struct ieee80211_channel *channel;
1448
1449         if (elems->ds_params && elems->ds_params_len == 1)
1450                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1451         else
1452                 freq = rx_status->freq;
1453
1454         channel = ieee80211_get_channel(local->hw.wiphy, freq);
1455
1456         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1457                 return;
1458
1459         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1460                                         channel, beacon);
1461         if (!bss)
1462                 return;
1463
1464         if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1465             (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1466                 struct ieee80211_channel_sw_ie *sw_elem =
1467                         (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1468                 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1469         }
1470
1471         ieee80211_rx_bss_put(local, bss);
1472 }
1473
1474
1475 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1476                                          struct ieee80211_mgmt *mgmt,
1477                                          size_t len,
1478                                          struct ieee80211_rx_status *rx_status)
1479 {
1480         struct ieee80211_if_managed *ifmgd;
1481         size_t baselen;
1482         struct ieee802_11_elems elems;
1483
1484         ifmgd = &sdata->u.mgd;
1485
1486         if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1487                 return; /* ignore ProbeResp to foreign address */
1488
1489         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1490         if (baselen > len)
1491                 return;
1492
1493         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1494                                 &elems);
1495
1496         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1497
1498         /* direct probe may be part of the association flow */
1499         if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1500                                &ifmgd->request)) {
1501                 printk(KERN_DEBUG "%s direct probe responded\n",
1502                        sdata->dev->name);
1503                 ieee80211_authenticate(sdata);
1504         }
1505
1506         if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1507                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1508 }
1509
1510 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1511                                      struct ieee80211_mgmt *mgmt,
1512                                      size_t len,
1513                                      struct ieee80211_rx_status *rx_status)
1514 {
1515         struct ieee80211_if_managed *ifmgd;
1516         size_t baselen;
1517         struct ieee802_11_elems elems;
1518         struct ieee80211_local *local = sdata->local;
1519         u32 changed = 0;
1520         bool erp_valid, directed_tim;
1521         u8 erp_value = 0;
1522
1523         /* Process beacon from the current BSS */
1524         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1525         if (baselen > len)
1526                 return;
1527
1528         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1529
1530         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1531
1532         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1533                 return;
1534
1535         ifmgd = &sdata->u.mgd;
1536
1537         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1538             memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1539                 return;
1540
1541         if (rx_status->freq != local->hw.conf.channel->center_freq)
1542                 return;
1543
1544         ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1545                                  elems.wmm_param_len);
1546
1547         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1548                 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1549
1550                 if (directed_tim) {
1551                         if (local->hw.conf.dynamic_ps_timeout > 0) {
1552                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1553                                 ieee80211_hw_config(local,
1554                                                     IEEE80211_CONF_CHANGE_PS);
1555                                 ieee80211_send_nullfunc(local, sdata, 0);
1556                         } else {
1557                                 local->pspolling = true;
1558
1559                                 /*
1560                                  * Here is assumed that the driver will be
1561                                  * able to send ps-poll frame and receive a
1562                                  * response even though power save mode is
1563                                  * enabled, but some drivers might require
1564                                  * to disable power save here. This needs
1565                                  * to be investigated.
1566                                  */
1567                                 ieee80211_send_pspoll(local, sdata);
1568                         }
1569                 }
1570         }
1571
1572         if (elems.erp_info && elems.erp_info_len >= 1) {
1573                 erp_valid = true;
1574                 erp_value = elems.erp_info[0];
1575         } else {
1576                 erp_valid = false;
1577         }
1578         changed |= ieee80211_handle_bss_capability(sdata,
1579                         le16_to_cpu(mgmt->u.beacon.capab_info),
1580                         erp_valid, erp_value);
1581
1582
1583         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1584             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1585                 struct sta_info *sta;
1586                 struct ieee80211_supported_band *sband;
1587                 u16 ap_ht_cap_flags;
1588
1589                 rcu_read_lock();
1590
1591                 sta = sta_info_get(local, ifmgd->bssid);
1592                 if (!sta) {
1593                         rcu_read_unlock();
1594                         return;
1595                 }
1596
1597                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1598
1599                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1600                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1601
1602                 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1603
1604                 rcu_read_unlock();
1605
1606                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1607                                                ap_ht_cap_flags);
1608         }
1609
1610         if (elems.country_elem) {
1611                 /* Note we are only reviewing this on beacons
1612                  * for the BSSID we are associated to */
1613                 regulatory_hint_11d(local->hw.wiphy,
1614                         elems.country_elem, elems.country_elem_len);
1615
1616                 /* TODO: IBSS also needs this */
1617                 if (elems.pwr_constr_elem)
1618                         ieee80211_handle_pwr_constr(sdata,
1619                                 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1620                                 elems.pwr_constr_elem,
1621                                 elems.pwr_constr_elem_len);
1622         }
1623
1624         ieee80211_bss_info_change_notify(sdata, changed);
1625 }
1626
1627 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1628                                           struct sk_buff *skb,
1629                                           struct ieee80211_rx_status *rx_status)
1630 {
1631         struct ieee80211_local *local = sdata->local;
1632         struct ieee80211_mgmt *mgmt;
1633         u16 fc;
1634
1635         if (skb->len < 24)
1636                 return RX_DROP_MONITOR;
1637
1638         mgmt = (struct ieee80211_mgmt *) skb->data;
1639         fc = le16_to_cpu(mgmt->frame_control);
1640
1641         switch (fc & IEEE80211_FCTL_STYPE) {
1642         case IEEE80211_STYPE_PROBE_REQ:
1643         case IEEE80211_STYPE_PROBE_RESP:
1644         case IEEE80211_STYPE_BEACON:
1645                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1646         case IEEE80211_STYPE_AUTH:
1647         case IEEE80211_STYPE_ASSOC_RESP:
1648         case IEEE80211_STYPE_REASSOC_RESP:
1649         case IEEE80211_STYPE_DEAUTH:
1650         case IEEE80211_STYPE_DISASSOC:
1651                 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1652                 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1653                 return RX_QUEUED;
1654         }
1655
1656         return RX_DROP_MONITOR;
1657 }
1658
1659 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1660                                          struct sk_buff *skb)
1661 {
1662         struct ieee80211_rx_status *rx_status;
1663         struct ieee80211_mgmt *mgmt;
1664         u16 fc;
1665
1666         rx_status = (struct ieee80211_rx_status *) skb->cb;
1667         mgmt = (struct ieee80211_mgmt *) skb->data;
1668         fc = le16_to_cpu(mgmt->frame_control);
1669
1670         switch (fc & IEEE80211_FCTL_STYPE) {
1671         case IEEE80211_STYPE_PROBE_RESP:
1672                 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1673                                              rx_status);
1674                 break;
1675         case IEEE80211_STYPE_BEACON:
1676                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1677                                          rx_status);
1678                 break;
1679         case IEEE80211_STYPE_AUTH:
1680                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1681                 break;
1682         case IEEE80211_STYPE_ASSOC_RESP:
1683                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1684                 break;
1685         case IEEE80211_STYPE_REASSOC_RESP:
1686                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1687                 break;
1688         case IEEE80211_STYPE_DEAUTH:
1689                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1690                 break;
1691         case IEEE80211_STYPE_DISASSOC:
1692                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1693                 break;
1694         }
1695
1696         kfree_skb(skb);
1697 }
1698
1699 static void ieee80211_sta_timer(unsigned long data)
1700 {
1701         struct ieee80211_sub_if_data *sdata =
1702                 (struct ieee80211_sub_if_data *) data;
1703         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1704         struct ieee80211_local *local = sdata->local;
1705
1706         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1707         queue_work(local->hw.workqueue, &ifmgd->work);
1708 }
1709
1710 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1711 {
1712         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1713         struct ieee80211_local *local = sdata->local;
1714
1715         if (local->ops->reset_tsf) {
1716                 /* Reset own TSF to allow time synchronization work. */
1717                 local->ops->reset_tsf(local_to_hw(local));
1718         }
1719
1720         ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1721
1722
1723         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1724                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1725         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1726                 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1727         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1728                 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1729         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1730                 ifmgd->auth_alg = WLAN_AUTH_FT;
1731         else
1732                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1733         ifmgd->auth_transaction = -1;
1734         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1735         ifmgd->assoc_scan_tries = 0;
1736         ifmgd->direct_probe_tries = 0;
1737         ifmgd->auth_tries = 0;
1738         ifmgd->assoc_tries = 0;
1739         netif_tx_stop_all_queues(sdata->dev);
1740         netif_carrier_off(sdata->dev);
1741 }
1742
1743 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1744 {
1745         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1746         struct ieee80211_local *local = sdata->local;
1747         struct ieee80211_bss *bss;
1748         u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1749         u8 ssid_len = ifmgd->ssid_len;
1750         u16 capa_mask = WLAN_CAPABILITY_ESS;
1751         u16 capa_val = WLAN_CAPABILITY_ESS;
1752         struct ieee80211_channel *chan = local->oper_channel;
1753
1754         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1755             ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1756                             IEEE80211_STA_AUTO_BSSID_SEL |
1757                             IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1758                 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1759                 if (sdata->default_key)
1760                         capa_val |= WLAN_CAPABILITY_PRIVACY;
1761         }
1762
1763         if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1764                 chan = NULL;
1765
1766         if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1767                 bssid = NULL;
1768
1769         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1770                 ssid = NULL;
1771                 ssid_len = 0;
1772         }
1773
1774         bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1775                                        bssid, ssid, ssid_len,
1776                                        capa_mask, capa_val);
1777
1778         if (bss) {
1779                 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1780                 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1781                         ieee80211_sta_set_ssid(sdata, bss->ssid,
1782                                                bss->ssid_len);
1783                 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1784                 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1785                                                     bss->supp_rates);
1786                 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1787                         sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1788                 else
1789                         sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1790
1791                 /* Send out direct probe if no probe resp was received or
1792                  * the one we have is outdated
1793                  */
1794                 if (!bss->last_probe_resp ||
1795                     time_after(jiffies, bss->last_probe_resp
1796                                         + IEEE80211_SCAN_RESULT_EXPIRE))
1797                         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1798                 else
1799                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1800
1801                 ieee80211_rx_bss_put(local, bss);
1802                 ieee80211_sta_reset_auth(sdata);
1803                 return 0;
1804         } else {
1805                 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1806                         ifmgd->assoc_scan_tries++;
1807                         /* XXX maybe racy? */
1808                         if (local->scan_req)
1809                                 return -1;
1810                         memcpy(local->int_scan_req.ssids[0].ssid,
1811                                ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1812                         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1813                                 local->int_scan_req.ssids[0].ssid_len = 0;
1814                         else
1815                                 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1816
1817                         if (ieee80211_start_scan(sdata, &local->int_scan_req))
1818                                 ieee80211_scan_failed(local);
1819
1820                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1821                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1822                 } else {
1823                         ifmgd->assoc_scan_tries = 0;
1824                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1825                 }
1826         }
1827         return -1;
1828 }
1829
1830
1831 static void ieee80211_sta_work(struct work_struct *work)
1832 {
1833         struct ieee80211_sub_if_data *sdata =
1834                 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1835         struct ieee80211_local *local = sdata->local;
1836         struct ieee80211_if_managed *ifmgd;
1837         struct sk_buff *skb;
1838
1839         if (!netif_running(sdata->dev))
1840                 return;
1841
1842         if (local->sw_scanning || local->hw_scanning)
1843                 return;
1844
1845         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1846                 return;
1847         ifmgd = &sdata->u.mgd;
1848
1849         while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1850                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1851
1852         if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1853             ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1854             ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1855             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1856                 /*
1857                  * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1858                  * (which queued ieee80211_sta_work) did not return an error. Thus, call
1859                  * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1860                  * notify the scan requester.
1861                  */
1862                 if (ieee80211_start_scan(sdata, local->scan_req))
1863                         ieee80211_scan_failed(local);
1864                 return;
1865         }
1866
1867         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1868                 if (ieee80211_sta_config_auth(sdata))
1869                         return;
1870                 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1871         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1872                 return;
1873
1874         switch (ifmgd->state) {
1875         case IEEE80211_STA_MLME_DISABLED:
1876                 break;
1877         case IEEE80211_STA_MLME_DIRECT_PROBE:
1878                 ieee80211_direct_probe(sdata);
1879                 break;
1880         case IEEE80211_STA_MLME_AUTHENTICATE:
1881                 ieee80211_authenticate(sdata);
1882                 break;
1883         case IEEE80211_STA_MLME_ASSOCIATE:
1884                 ieee80211_associate(sdata);
1885                 break;
1886         case IEEE80211_STA_MLME_ASSOCIATED:
1887                 ieee80211_associated(sdata);
1888                 break;
1889         default:
1890                 WARN_ON(1);
1891                 break;
1892         }
1893
1894         if (ieee80211_privacy_mismatch(sdata)) {
1895                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1896                        "mixed-cell disabled - disassociate\n", sdata->dev->name);
1897
1898                 ieee80211_set_disassoc(sdata, false, true,
1899                                         WLAN_REASON_UNSPECIFIED);
1900         }
1901 }
1902
1903 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1904 {
1905         if (sdata->vif.type == NL80211_IFTYPE_STATION)
1906                 queue_work(sdata->local->hw.workqueue,
1907                            &sdata->u.mgd.work);
1908 }
1909
1910 /* interface setup */
1911 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1912 {
1913         struct ieee80211_if_managed *ifmgd;
1914
1915         ifmgd = &sdata->u.mgd;
1916         INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1917         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1918         INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
1919         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1920                     (unsigned long) sdata);
1921         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1922                     (unsigned long) sdata);
1923         skb_queue_head_init(&ifmgd->skb_queue);
1924
1925         ifmgd->capab = WLAN_CAPABILITY_ESS;
1926         ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1927                 IEEE80211_AUTH_ALG_SHARED_KEY;
1928         ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1929                 IEEE80211_STA_AUTO_BSSID_SEL |
1930                 IEEE80211_STA_AUTO_CHANNEL_SEL;
1931         if (sdata->local->hw.queues >= 4)
1932                 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1933 }
1934
1935 /* configuration hooks */
1936 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1937 {
1938         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1939         struct ieee80211_local *local = sdata->local;
1940
1941         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1942                 return;
1943
1944         if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1945                              IEEE80211_STA_AUTO_BSSID_SEL)) &&
1946             (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1947                              IEEE80211_STA_AUTO_SSID_SEL))) {
1948
1949                 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1950                         ieee80211_set_disassoc(sdata, true, true,
1951                                                WLAN_REASON_DEAUTH_LEAVING);
1952
1953                 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
1954                     ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1955                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1956                 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
1957                         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1958                 queue_work(local->hw.workqueue, &ifmgd->work);
1959         }
1960 }
1961
1962 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1963 {
1964         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1965
1966         if (ifmgd->ssid_len)
1967                 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1968         else
1969                 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1970
1971         return 0;
1972 }
1973
1974 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1975 {
1976         struct ieee80211_if_managed *ifmgd;
1977
1978         if (len > IEEE80211_MAX_SSID_LEN)
1979                 return -EINVAL;
1980
1981         ifmgd = &sdata->u.mgd;
1982
1983         if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1984                 /*
1985                  * Do not use reassociation if SSID is changed (different ESS).
1986                  */
1987                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1988                 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1989                 memcpy(ifmgd->ssid, ssid, len);
1990                 ifmgd->ssid_len = len;
1991         }
1992
1993         return ieee80211_sta_commit(sdata);
1994 }
1995
1996 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1997 {
1998         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1999         memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2000         *len = ifmgd->ssid_len;
2001         return 0;
2002 }
2003
2004 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2005 {
2006         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2007
2008         if (is_valid_ether_addr(bssid)) {
2009                 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2010                 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2011         } else {
2012                 memset(ifmgd->bssid, 0, ETH_ALEN);
2013                 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2014         }
2015
2016         if (netif_running(sdata->dev)) {
2017                 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2018                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2019                                "the low-level driver\n", sdata->dev->name);
2020                 }
2021         }
2022
2023         return ieee80211_sta_commit(sdata);
2024 }
2025
2026 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2027                                const char *ie, size_t len)
2028 {
2029         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2030
2031         kfree(ifmgd->extra_ie);
2032         if (len == 0) {
2033                 ifmgd->extra_ie = NULL;
2034                 ifmgd->extra_ie_len = 0;
2035                 return 0;
2036         }
2037         ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2038         if (!ifmgd->extra_ie) {
2039                 ifmgd->extra_ie_len = 0;
2040                 return -ENOMEM;
2041         }
2042         memcpy(ifmgd->extra_ie, ie, len);
2043         ifmgd->extra_ie_len = len;
2044         return 0;
2045 }
2046
2047 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2048 {
2049         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2050                sdata->dev->name, reason);
2051
2052         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2053                 return -EINVAL;
2054
2055         ieee80211_set_disassoc(sdata, true, true, reason);
2056         return 0;
2057 }
2058
2059 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2060 {
2061         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2062
2063         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2064                sdata->dev->name, reason);
2065
2066         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2067                 return -EINVAL;
2068
2069         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2070                 return -ENOLINK;
2071
2072         ieee80211_set_disassoc(sdata, false, true, reason);
2073         return 0;
2074 }
2075
2076 /* scan finished notification */
2077 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2078 {
2079         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2080
2081         /* Restart STA timers */
2082         rcu_read_lock();
2083         list_for_each_entry_rcu(sdata, &local->interfaces, list)
2084                 ieee80211_restart_sta_timer(sdata);
2085         rcu_read_unlock();
2086 }
2087
2088 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2089 {
2090         struct ieee80211_local *local =
2091                 container_of(work, struct ieee80211_local,
2092                              dynamic_ps_disable_work);
2093
2094         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2095                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2096                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2097         }
2098
2099         ieee80211_wake_queues_by_reason(&local->hw,
2100                                         IEEE80211_QUEUE_STOP_REASON_PS);
2101 }
2102
2103 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2104 {
2105         struct ieee80211_local *local =
2106                 container_of(work, struct ieee80211_local,
2107                              dynamic_ps_enable_work);
2108         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2109
2110         if (local->hw.conf.flags & IEEE80211_CONF_PS)
2111                 return;
2112
2113         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2114                 ieee80211_send_nullfunc(local, sdata, 1);
2115
2116         local->hw.conf.flags |= IEEE80211_CONF_PS;
2117         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2118 }
2119
2120 void ieee80211_dynamic_ps_timer(unsigned long data)
2121 {
2122         struct ieee80211_local *local = (void *) data;
2123
2124         queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2125 }
2126
2127 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2128                              struct ieee80211_sub_if_data *sdata,
2129                              int powersave)
2130 {
2131         struct sk_buff *skb;
2132         struct ieee80211_hdr *nullfunc;
2133         __le16 fc;
2134
2135         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2136                 return;
2137
2138         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2139         if (!skb) {
2140                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2141                        "frame\n", sdata->dev->name);
2142                 return;
2143         }
2144         skb_reserve(skb, local->hw.extra_tx_headroom);
2145
2146         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2147         memset(nullfunc, 0, 24);
2148         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2149                          IEEE80211_FCTL_TODS);
2150         if (powersave)
2151                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2152         nullfunc->frame_control = fc;
2153         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2154         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2155         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2156
2157         ieee80211_tx_skb(sdata, skb, 0);
2158 }