git.oblomov.eu Git - linux-2.6/blob - net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.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 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "rate.h"
  34 #include "led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
  38 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  39 #define IEEE80211_AUTH_MAX_TRIES 3
  40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  41 #define IEEE80211_ASSOC_MAX_TRIES 3
  42 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  43 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  44 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  45 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  47 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  48 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
  49
  50 #define IEEE80211_PROBE_DELAY (HZ / 33)
  51 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  52 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  53 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  54 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  55 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  56 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  57
  58 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  59
  60
  61 #define ERP_INFO_USE_PROTECTION BIT(1)
  62
  63 /* mgmt header + 1 byte action code */
  64 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  65
  66 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  67 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  68 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  69 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  70 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  71
  72 /* next values represent the buffer size for A-MPDU frame.
  73  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  74 #define IEEE80211_MIN_AMPDU_BUF 0x8
  75 #define IEEE80211_MAX_AMPDU_BUF 0x40
  76
  77 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
  78                                      u8 *ssid, size_t ssid_len);
  79 static struct ieee80211_sta_bss *
  80 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
  81                      u8 *ssid, u8 ssid_len);
  82 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
  83                                  struct ieee80211_sta_bss *bss);
  84 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
  85                                    struct ieee80211_if_sta *ifsta);
  86 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata);
  87 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata,
  88                                     u8 *ssid, size_t ssid_len);
  89 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
  90                                      struct ieee80211_if_sta *ifsta);
  91 static void sta_rx_agg_session_timer_expired(unsigned long data);
  92
  93
  94 void ieee802_11_parse_elems(u8 *start, size_t len,
  95                             struct ieee802_11_elems *elems)
  96 {
  97         size_t left = len;
  98         u8 *pos = start;
  99
 100         memset(elems, 0, sizeof(*elems));
 101         elems->ie_start = start;
 102         elems->total_len = len;
 103
 104         while (left >= 2) {
 105                 u8 id, elen;
 106
 107                 id = *pos++;
 108                 elen = *pos++;
 109                 left -= 2;
 110
 111                 if (elen > left)
 112                         return;
 113
 114                 switch (id) {
 115                 case WLAN_EID_SSID:
 116                         elems->ssid = pos;
 117                         elems->ssid_len = elen;
 118                         break;
 119                 case WLAN_EID_SUPP_RATES:
 120                         elems->supp_rates = pos;
 121                         elems->supp_rates_len = elen;
 122                         break;
 123                 case WLAN_EID_FH_PARAMS:
 124                         elems->fh_params = pos;
 125                         elems->fh_params_len = elen;
 126                         break;
 127                 case WLAN_EID_DS_PARAMS:
 128                         elems->ds_params = pos;
 129                         elems->ds_params_len = elen;
 130                         break;
 131                 case WLAN_EID_CF_PARAMS:
 132                         elems->cf_params = pos;
 133                         elems->cf_params_len = elen;
 134                         break;
 135                 case WLAN_EID_TIM:
 136                         elems->tim = pos;
 137                         elems->tim_len = elen;
 138                         break;
 139                 case WLAN_EID_IBSS_PARAMS:
 140                         elems->ibss_params = pos;
 141                         elems->ibss_params_len = elen;
 142                         break;
 143                 case WLAN_EID_CHALLENGE:
 144                         elems->challenge = pos;
 145                         elems->challenge_len = elen;
 146                         break;
 147                 case WLAN_EID_WPA:
 148                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 149                             pos[2] == 0xf2) {
 150                                 /* Microsoft OUI (00:50:F2) */
 151                                 if (pos[3] == 1) {
 152                                         /* OUI Type 1 - WPA IE */
 153                                         elems->wpa = pos;
 154                                         elems->wpa_len = elen;
 155                                 } else if (elen >= 5 && pos[3] == 2) {
 156                                         if (pos[4] == 0) {
 157                                                 elems->wmm_info = pos;
 158                                                 elems->wmm_info_len = elen;
 159                                         } else if (pos[4] == 1) {
 160                                                 elems->wmm_param = pos;
 161                                                 elems->wmm_param_len = elen;
 162                                         }
 163                                 }
 164                         }
 165                         break;
 166                 case WLAN_EID_RSN:
 167                         elems->rsn = pos;
 168                         elems->rsn_len = elen;
 169                         break;
 170                 case WLAN_EID_ERP_INFO:
 171                         elems->erp_info = pos;
 172                         elems->erp_info_len = elen;
 173                         break;
 174                 case WLAN_EID_EXT_SUPP_RATES:
 175                         elems->ext_supp_rates = pos;
 176                         elems->ext_supp_rates_len = elen;
 177                         break;
 178                 case WLAN_EID_HT_CAPABILITY:
 179                         elems->ht_cap_elem = pos;
 180                         elems->ht_cap_elem_len = elen;
 181                         break;
 182                 case WLAN_EID_HT_EXTRA_INFO:
 183                         elems->ht_info_elem = pos;
 184                         elems->ht_info_elem_len = elen;
 185                         break;
 186                 case WLAN_EID_MESH_ID:
 187                         elems->mesh_id = pos;
 188                         elems->mesh_id_len = elen;
 189                         break;
 190                 case WLAN_EID_MESH_CONFIG:
 191                         elems->mesh_config = pos;
 192                         elems->mesh_config_len = elen;
 193                         break;
 194                 case WLAN_EID_PEER_LINK:
 195                         elems->peer_link = pos;
 196                         elems->peer_link_len = elen;
 197                         break;
 198                 case WLAN_EID_PREQ:
 199                         elems->preq = pos;
 200                         elems->preq_len = elen;
 201                         break;
 202                 case WLAN_EID_PREP:
 203                         elems->prep = pos;
 204                         elems->prep_len = elen;
 205                         break;
 206                 case WLAN_EID_PERR:
 207                         elems->perr = pos;
 208                         elems->perr_len = elen;
 209                         break;
 210                 case WLAN_EID_CHANNEL_SWITCH:
 211                         elems->ch_switch_elem = pos;
 212                         elems->ch_switch_elem_len = elen;
 213                         break;
 214                 case WLAN_EID_QUIET:
 215                         if (!elems->quiet_elem) {
 216                                 elems->quiet_elem = pos;
 217                                 elems->quiet_elem_len = elen;
 218                         }
 219                         elems->num_of_quiet_elem++;
 220                         break;
 221                 case WLAN_EID_COUNTRY:
 222                         elems->country_elem = pos;
 223                         elems->country_elem_len = elen;
 224                         break;
 225                 case WLAN_EID_PWR_CONSTRAINT:
 226                         elems->pwr_constr_elem = pos;
 227                         elems->pwr_constr_elem_len = elen;
 228                         break;
 229                 default:
 230                         break;
 231                 }
 232
 233                 left -= elen;
 234                 pos += elen;
 235         }
 236 }
 237
 238
 239 static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
 240 {
 241         u8 *end, *pos;
 242
 243         pos = bss->ies;
 244         if (pos == NULL)
 245                 return NULL;
 246         end = pos + bss->ies_len;
 247
 248         while (pos + 1 < end) {
 249                 if (pos + 2 + pos[1] > end)
 250                         break;
 251                 if (pos[0] == ie)
 252                         return pos;
 253                 pos += 2 + pos[1];
 254         }
 255
 256         return NULL;
 257 }
 258
 259
 260 static int ecw2cw(int ecw)
 261 {
 262         return (1 << ecw) - 1;
 263 }
 264
 265
 266 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
 267                                          struct ieee80211_sta_bss *bss,
 268                                          int ibss)
 269 {
 270         struct ieee80211_local *local = sdata->local;
 271         int i, have_higher_than_11mbit = 0;
 272
 273
 274         /* cf. IEEE 802.11 9.2.12 */
 275         for (i = 0; i < bss->supp_rates_len; i++)
 276                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 277                         have_higher_than_11mbit = 1;
 278
 279         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 280             have_higher_than_11mbit)
 281                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 282         else
 283                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 284
 285
 286         if (local->ops->conf_tx) {
 287                 struct ieee80211_tx_queue_params qparam;
 288
 289                 memset(&qparam, 0, sizeof(qparam));
 290
 291                 qparam.aifs = 2;
 292
 293                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 294                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 295                         qparam.cw_min = 31;
 296                 else
 297                         qparam.cw_min = 15;
 298
 299                 qparam.cw_max = 1023;
 300                 qparam.txop = 0;
 301
 302                 for (i = 0; i < local_to_hw(local)->queues; i++)
 303                         local->ops->conf_tx(local_to_hw(local), i, &qparam);
 304         }
 305 }
 306
 307 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
 308                                      struct ieee80211_if_sta *ifsta,
 309                                      u8 *wmm_param, size_t wmm_param_len)
 310 {
 311         struct ieee80211_tx_queue_params params;
 312         size_t left;
 313         int count;
 314         u8 *pos;
 315
 316         if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
 317                 return;
 318
 319         if (!wmm_param)
 320                 return;
 321
 322         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 323                 return;
 324         count = wmm_param[6] & 0x0f;
 325         if (count == ifsta->wmm_last_param_set)
 326                 return;
 327         ifsta->wmm_last_param_set = count;
 328
 329         pos = wmm_param + 8;
 330         left = wmm_param_len - 8;
 331
 332         memset(&params, 0, sizeof(params));
 333
 334         if (!local->ops->conf_tx)
 335                 return;
 336
 337         local->wmm_acm = 0;
 338         for (; left >= 4; left -= 4, pos += 4) {
 339                 int aci = (pos[0] >> 5) & 0x03;
 340                 int acm = (pos[0] >> 4) & 0x01;
 341                 int queue;
 342
 343                 switch (aci) {
 344                 case 1:
 345                         queue = 3;
 346                         if (acm)
 347                                 local->wmm_acm |= BIT(0) | BIT(3);
 348                         break;
 349                 case 2:
 350                         queue = 1;
 351                         if (acm)
 352                                 local->wmm_acm |= BIT(4) | BIT(5);
 353                         break;
 354                 case 3:
 355                         queue = 0;
 356                         if (acm)
 357                                 local->wmm_acm |= BIT(6) | BIT(7);
 358                         break;
 359                 case 0:
 360                 default:
 361                         queue = 2;
 362                         if (acm)
 363                                 local->wmm_acm |= BIT(1) | BIT(2);
 364                         break;
 365                 }
 366
 367                 params.aifs = pos[0] & 0x0f;
 368                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 369                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 370                 params.txop = get_unaligned_le16(pos + 2);
 371 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 372                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 373                        "cWmin=%d cWmax=%d txop=%d\n",
 374                        local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
 375                        params.cw_max, params.txop);
 376 #endif
 377                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 378                  * AC for now) */
 379                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 380                         printk(KERN_DEBUG "%s: failed to set TX queue "
 381                                "parameters for queue %d\n", local->mdev->name, queue);
 382                 }
 383         }
 384 }
 385
 386 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 387                                            bool use_protection,
 388                                            bool use_short_preamble)
 389 {
 390         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 391 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 392         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 393         DECLARE_MAC_BUF(mac);
 394 #endif
 395         u32 changed = 0;
 396
 397         if (use_protection != bss_conf->use_cts_prot) {
 398 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 399                 if (net_ratelimit()) {
 400                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 401                                "%s)\n",
 402                                sdata->dev->name,
 403                                use_protection ? "enabled" : "disabled",
 404                                print_mac(mac, ifsta->bssid));
 405                 }
 406 #endif
 407                 bss_conf->use_cts_prot = use_protection;
 408                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 409         }
 410
 411         if (use_short_preamble != bss_conf->use_short_preamble) {
 412 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 413                 if (net_ratelimit()) {
 414                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 415                                " (BSSID=%s)\n",
 416                                sdata->dev->name,
 417                                use_short_preamble ? "short" : "long",
 418                                print_mac(mac, ifsta->bssid));
 419                 }
 420 #endif
 421                 bss_conf->use_short_preamble = use_short_preamble;
 422                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 423         }
 424
 425         return changed;
 426 }
 427
 428 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 429                                    u8 erp_value)
 430 {
 431         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 432         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 433
 434         return ieee80211_handle_protect_preamb(sdata,
 435                         use_protection, use_short_preamble);
 436 }
 437
 438 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 439                                            struct ieee80211_sta_bss *bss)
 440 {
 441         u32 changed = 0;
 442
 443         if (bss->has_erp_value)
 444                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 445         else {
 446                 u16 capab = bss->capability;
 447                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 448                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 449         }
 450
 451         return changed;
 452 }
 453
 454 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 455                                    struct ieee80211_ht_info *ht_info)
 456 {
 457
 458         if (ht_info == NULL)
 459                 return -EINVAL;
 460
 461         memset(ht_info, 0, sizeof(*ht_info));
 462
 463         if (ht_cap_ie) {
 464                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 465
 466                 ht_info->ht_supported = 1;
 467                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 468                 ht_info->ampdu_factor =
 469                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 470                 ht_info->ampdu_density =
 471                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 472                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 473         } else
 474                 ht_info->ht_supported = 0;
 475
 476         return 0;
 477 }
 478
 479 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 480                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 481                         struct ieee80211_ht_bss_info *bss_info)
 482 {
 483         if (bss_info == NULL)
 484                 return -EINVAL;
 485
 486         memset(bss_info, 0, sizeof(*bss_info));
 487
 488         if (ht_add_info_ie) {
 489                 u16 op_mode;
 490                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 491
 492                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 493                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 494                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 495         }
 496
 497         return 0;
 498 }
 499
 500 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
 501                                          struct ieee80211_if_sta *ifsta)
 502 {
 503         union iwreq_data wrqu;
 504
 505         if (ifsta->assocreq_ies) {
 506                 memset(&wrqu, 0, sizeof(wrqu));
 507                 wrqu.data.length = ifsta->assocreq_ies_len;
 508                 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
 509                                     ifsta->assocreq_ies);
 510         }
 511
 512         if (ifsta->assocresp_ies) {
 513                 memset(&wrqu, 0, sizeof(wrqu));
 514                 wrqu.data.length = ifsta->assocresp_ies_len;
 515                 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
 516                                     ifsta->assocresp_ies);
 517         }
 518 }
 519
 520
 521 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 522                                      struct ieee80211_if_sta *ifsta,
 523                                      bool assoc)
 524 {
 525         struct ieee80211_local *local = sdata->local;
 526         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 527         union iwreq_data wrqu;
 528         u32 changed = BSS_CHANGED_ASSOC;
 529
 530         if (assoc) {
 531                 struct ieee80211_sta_bss *bss;
 532
 533                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 534
 535                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 536                         return;
 537
 538                 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
 539                                            conf->channel->center_freq,
 540                                            ifsta->ssid, ifsta->ssid_len);
 541                 if (bss) {
 542                         /* set timing information */
 543                         sdata->bss_conf.beacon_int = bss->beacon_int;
 544                         sdata->bss_conf.timestamp = bss->timestamp;
 545                         sdata->bss_conf.dtim_period = bss->dtim_period;
 546
 547                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 548
 549                         ieee80211_rx_bss_put(local, bss);
 550                 }
 551
 552                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 553                         changed |= BSS_CHANGED_HT;
 554                         sdata->bss_conf.assoc_ht = 1;
 555                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 556                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 557                 }
 558
 559                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 560                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 561                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 562                 ieee80211_sta_send_associnfo(sdata, ifsta);
 563         } else {
 564                 netif_carrier_off(sdata->dev);
 565                 ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid);
 566                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 567                 changed |= ieee80211_reset_erp_info(sdata);
 568
 569                 sdata->bss_conf.assoc_ht = 0;
 570                 sdata->bss_conf.ht_conf = NULL;
 571                 sdata->bss_conf.ht_bss_conf = NULL;
 572
 573                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 574         }
 575         ifsta->last_probe = jiffies;
 576         ieee80211_led_assoc(local, assoc);
 577
 578         sdata->bss_conf.assoc = assoc;
 579         ieee80211_bss_info_change_notify(sdata, changed);
 580
 581         if (assoc)
 582                 netif_carrier_on(sdata->dev);
 583
 584         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 585         wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
 586 }
 587
 588 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 589                                    struct ieee80211_if_sta *ifsta, int deauth)
 590 {
 591         if (deauth) {
 592                 ifsta->direct_probe_tries = 0;
 593                 ifsta->auth_tries = 0;
 594         }
 595         ifsta->assoc_scan_tries = 0;
 596         ifsta->assoc_tries = 0;
 597         ieee80211_set_associated(sdata, ifsta, 0);
 598 }
 599
 600 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 601                       int encrypt)
 602 {
 603         skb->dev = sdata->local->mdev;
 604         skb_set_mac_header(skb, 0);
 605         skb_set_network_header(skb, 0);
 606         skb_set_transport_header(skb, 0);
 607
 608         skb->iif = sdata->dev->ifindex;
 609         skb->do_not_encrypt = !encrypt;
 610
 611         dev_queue_xmit(skb);
 612 }
 613
 614
 615 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
 616                                 struct ieee80211_if_sta *ifsta,
 617                                 int transaction, u8 *extra, size_t extra_len,
 618                                 int encrypt)
 619 {
 620         struct ieee80211_local *local = sdata->local;
 621         struct sk_buff *skb;
 622         struct ieee80211_mgmt *mgmt;
 623
 624         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 625                             sizeof(*mgmt) + 6 + extra_len);
 626         if (!skb) {
 627                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 628                        "frame\n", sdata->dev->name);
 629                 return;
 630         }
 631         skb_reserve(skb, local->hw.extra_tx_headroom);
 632
 633         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 634         memset(mgmt, 0, 24 + 6);
 635         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 636                                           IEEE80211_STYPE_AUTH);
 637         if (encrypt)
 638                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 639         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 640         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 641         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 642         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 643         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 644         ifsta->auth_transaction = transaction + 1;
 645         mgmt->u.auth.status_code = cpu_to_le16(0);
 646         if (extra)
 647                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 648
 649         ieee80211_sta_tx(sdata, skb, encrypt);
 650 }
 651
 652 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
 653                                    struct ieee80211_if_sta *ifsta)
 654 {
 655         DECLARE_MAC_BUF(mac);
 656
 657         ifsta->direct_probe_tries++;
 658         if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
 659                 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
 660                        sdata->dev->name, print_mac(mac, ifsta->bssid));
 661                 ifsta->state = IEEE80211_STA_MLME_DISABLED;
 662                 return;
 663         }
 664
 665         printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
 666                         sdata->dev->name, print_mac(mac, ifsta->bssid),
 667                         ifsta->direct_probe_tries);
 668
 669         ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
 670
 671         set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
 672
 673         /* Direct probe is sent to broadcast address as some APs
 674          * will not answer to direct packet in unassociated state.
 675          */
 676         ieee80211_send_probe_req(sdata, NULL,
 677                                  ifsta->ssid, ifsta->ssid_len);
 678
 679         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 680 }
 681
 682
 683 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
 684                                    struct ieee80211_if_sta *ifsta)
 685 {
 686         DECLARE_MAC_BUF(mac);
 687
 688         ifsta->auth_tries++;
 689         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 690                 printk(KERN_DEBUG "%s: authentication with AP %s"
 691                        " timed out\n",
 692                        sdata->dev->name, print_mac(mac, ifsta->bssid));
 693                 ifsta->state = IEEE80211_STA_MLME_DISABLED;
 694                 return;
 695         }
 696
 697         ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
 698         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 699                sdata->dev->name, print_mac(mac, ifsta->bssid));
 700
 701         ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
 702
 703         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 704 }
 705
 706 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 707                                       struct ieee80211_supported_band *sband,
 708                                       u64 *rates)
 709 {
 710         int i, j, count;
 711         *rates = 0;
 712         count = 0;
 713         for (i = 0; i < bss->supp_rates_len; i++) {
 714                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 715
 716                 for (j = 0; j < sband->n_bitrates; j++)
 717                         if (sband->bitrates[j].bitrate == rate) {
 718                                 *rates |= BIT(j);
 719                                 count++;
 720                                 break;
 721                         }
 722         }
 723
 724         return count;
 725 }
 726
 727 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
 728                                  struct ieee80211_if_sta *ifsta)
 729 {
 730         struct ieee80211_local *local = sdata->local;
 731         struct sk_buff *skb;
 732         struct ieee80211_mgmt *mgmt;
 733         u8 *pos, *ies, *ht_add_ie;
 734         int i, len, count, rates_len, supp_rates_len;
 735         u16 capab;
 736         struct ieee80211_sta_bss *bss;
 737         int wmm = 0;
 738         struct ieee80211_supported_band *sband;
 739         u64 rates = 0;
 740
 741         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 742                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 743                             ifsta->ssid_len);
 744         if (!skb) {
 745                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 746                        "frame\n", sdata->dev->name);
 747                 return;
 748         }
 749         skb_reserve(skb, local->hw.extra_tx_headroom);
 750
 751         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 752
 753         capab = ifsta->capab;
 754
 755         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 756                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 757                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 758                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 759                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 760         }
 761
 762         bss = ieee80211_rx_bss_get(local, ifsta->bssid,
 763                                    local->hw.conf.channel->center_freq,
 764                                    ifsta->ssid, ifsta->ssid_len);
 765         if (bss) {
 766                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 767                         capab |= WLAN_CAPABILITY_PRIVACY;
 768                 if (bss->wmm_used)
 769                         wmm = 1;
 770
 771                 /* get all rates supported by the device and the AP as
 772                  * some APs don't like getting a superset of their rates
 773                  * in the association request (e.g. D-Link DAP 1353 in
 774                  * b-only mode) */
 775                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 776
 777                 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 778                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 779                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 780
 781                 ieee80211_rx_bss_put(local, bss);
 782         } else {
 783                 rates = ~0;
 784                 rates_len = sband->n_bitrates;
 785         }
 786
 787         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 788         memset(mgmt, 0, 24);
 789         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 790         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 791         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 792
 793         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 794                 skb_put(skb, 10);
 795                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 796                                                   IEEE80211_STYPE_REASSOC_REQ);
 797                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 798                 mgmt->u.reassoc_req.listen_interval =
 799                                 cpu_to_le16(local->hw.conf.listen_interval);
 800                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 801                        ETH_ALEN);
 802         } else {
 803                 skb_put(skb, 4);
 804                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 805                                                   IEEE80211_STYPE_ASSOC_REQ);
 806                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 807                 mgmt->u.reassoc_req.listen_interval =
 808                                 cpu_to_le16(local->hw.conf.listen_interval);
 809         }
 810
 811         /* SSID */
 812         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 813         *pos++ = WLAN_EID_SSID;
 814         *pos++ = ifsta->ssid_len;
 815         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 816
 817         /* add all rates which were marked to be used above */
 818         supp_rates_len = rates_len;
 819         if (supp_rates_len > 8)
 820                 supp_rates_len = 8;
 821
 822         len = sband->n_bitrates;
 823         pos = skb_put(skb, supp_rates_len + 2);
 824         *pos++ = WLAN_EID_SUPP_RATES;
 825         *pos++ = supp_rates_len;
 826
 827         count = 0;
 828         for (i = 0; i < sband->n_bitrates; i++) {
 829                 if (BIT(i) & rates) {
 830                         int rate = sband->bitrates[i].bitrate;
 831                         *pos++ = (u8) (rate / 5);
 832                         if (++count == 8)
 833                                 break;
 834                 }
 835         }
 836
 837         if (rates_len > count) {
 838                 pos = skb_put(skb, rates_len - count + 2);
 839                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 840                 *pos++ = rates_len - count;
 841
 842                 for (i++; i < sband->n_bitrates; i++) {
 843                         if (BIT(i) & rates) {
 844                                 int rate = sband->bitrates[i].bitrate;
 845                                 *pos++ = (u8) (rate / 5);
 846                         }
 847                 }
 848         }
 849
 850         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 851                 /* 1. power capabilities */
 852                 pos = skb_put(skb, 4);
 853                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 854                 *pos++ = 2;
 855                 *pos++ = 0; /* min tx power */
 856                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 857
 858                 /* 2. supported channels */
 859                 /* TODO: get this in reg domain format */
 860                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 861                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 862                 *pos++ = 2 * sband->n_channels;
 863                 for (i = 0; i < sband->n_channels; i++) {
 864                         *pos++ = ieee80211_frequency_to_channel(
 865                                         sband->channels[i].center_freq);
 866                         *pos++ = 1; /* one channel in the subband*/
 867                 }
 868         }
 869
 870         if (ifsta->extra_ie) {
 871                 pos = skb_put(skb, ifsta->extra_ie_len);
 872                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 873         }
 874
 875         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 876                 pos = skb_put(skb, 9);
 877                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 878                 *pos++ = 7; /* len */
 879                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 880                 *pos++ = 0x50;
 881                 *pos++ = 0xf2;
 882                 *pos++ = 2; /* WME */
 883                 *pos++ = 0; /* WME info */
 884                 *pos++ = 1; /* WME ver */
 885                 *pos++ = 0;
 886         }
 887
 888         /* wmm support is a must to HT */
 889         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 890             sband->ht_info.ht_supported &&
 891             (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
 892                 struct ieee80211_ht_addt_info *ht_add_info =
 893                         (struct ieee80211_ht_addt_info *)ht_add_ie;
 894                 u16 cap = sband->ht_info.cap;
 895                 __le16 tmp;
 896                 u32 flags = local->hw.conf.channel->flags;
 897
 898                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 899                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 900                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 901                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 902                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 903                         }
 904                         break;
 905                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 906                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 907                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 908                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 909                         }
 910                         break;
 911                 }
 912
 913                 tmp = cpu_to_le16(cap);
 914                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 915                 *pos++ = WLAN_EID_HT_CAPABILITY;
 916                 *pos++ = sizeof(struct ieee80211_ht_cap);
 917                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 918                 memcpy(pos, &tmp, sizeof(u16));
 919                 pos += sizeof(u16);
 920                 /* TODO: needs a define here for << 2 */
 921                 *pos++ = sband->ht_info.ampdu_factor |
 922                          (sband->ht_info.ampdu_density << 2);
 923                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 924         }
 925
 926         kfree(ifsta->assocreq_ies);
 927         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 928         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 929         if (ifsta->assocreq_ies)
 930                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 931
 932         ieee80211_sta_tx(sdata, skb, 0);
 933 }
 934
 935
 936 static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
 937                                   struct ieee80211_if_sta *ifsta, u16 reason)
 938 {
 939         struct ieee80211_local *local = sdata->local;
 940         struct sk_buff *skb;
 941         struct ieee80211_mgmt *mgmt;
 942
 943         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 944         if (!skb) {
 945                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 946                        "frame\n", sdata->dev->name);
 947                 return;
 948         }
 949         skb_reserve(skb, local->hw.extra_tx_headroom);
 950
 951         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 952         memset(mgmt, 0, 24);
 953         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 954         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 955         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 956         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 957                                           IEEE80211_STYPE_DEAUTH);
 958         skb_put(skb, 2);
 959         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 960
 961         ieee80211_sta_tx(sdata, skb, 0);
 962 }
 963
 964
 965 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
 966                                     struct ieee80211_if_sta *ifsta, u16 reason)
 967 {
 968         struct ieee80211_local *local = sdata->local;
 969         struct sk_buff *skb;
 970         struct ieee80211_mgmt *mgmt;
 971
 972         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 973         if (!skb) {
 974                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 975                        "frame\n", sdata->dev->name);
 976                 return;
 977         }
 978         skb_reserve(skb, local->hw.extra_tx_headroom);
 979
 980         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 981         memset(mgmt, 0, 24);
 982         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 983         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 984         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 985         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 986                                           IEEE80211_STYPE_DISASSOC);
 987         skb_put(skb, 2);
 988         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 989
 990         ieee80211_sta_tx(sdata, skb, 0);
 991 }
 992
 993
 994 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
 995                                       struct ieee80211_if_sta *ifsta)
 996 {
 997         struct ieee80211_local *local = sdata->local;
 998         struct ieee80211_sta_bss *bss;
 999         int bss_privacy;
1000         int wep_privacy;
1001         int privacy_invoked;
1002
1003         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
1004                 return 0;
1005
1006         bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1007                                    local->hw.conf.channel->center_freq,
1008                                    ifsta->ssid, ifsta->ssid_len);
1009         if (!bss)
1010                 return 0;
1011
1012         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
1013         wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1014         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
1015
1016         ieee80211_rx_bss_put(local, bss);
1017
1018         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1019                 return 0;
1020
1021         return 1;
1022 }
1023
1024
1025 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1026                                 struct ieee80211_if_sta *ifsta)
1027 {
1028         DECLARE_MAC_BUF(mac);
1029
1030         ifsta->assoc_tries++;
1031         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1032                 printk(KERN_DEBUG "%s: association with AP %s"
1033                        " timed out\n",
1034                        sdata->dev->name, print_mac(mac, ifsta->bssid));
1035                 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1036                 return;
1037         }
1038
1039         ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1040         printk(KERN_DEBUG "%s: associate with AP %s\n",
1041                sdata->dev->name, print_mac(mac, ifsta->bssid));
1042         if (ieee80211_privacy_mismatch(sdata, ifsta)) {
1043                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1044                        "mixed-cell disabled - abort association\n", sdata->dev->name);
1045                 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1046                 return;
1047         }
1048
1049         ieee80211_send_assoc(sdata, ifsta);
1050
1051         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1052 }
1053
1054
1055 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
1056                                  struct ieee80211_if_sta *ifsta)
1057 {
1058         struct ieee80211_local *local = sdata->local;
1059         struct sta_info *sta;
1060         int disassoc;
1061         DECLARE_MAC_BUF(mac);
1062
1063         /* TODO: start monitoring current AP signal quality and number of
1064          * missed beacons. Scan other channels every now and then and search
1065          * for better APs. */
1066         /* TODO: remove expired BSSes */
1067
1068         ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
1069
1070         rcu_read_lock();
1071
1072         sta = sta_info_get(local, ifsta->bssid);
1073         if (!sta) {
1074                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1075                        sdata->dev->name, print_mac(mac, ifsta->bssid));
1076                 disassoc = 1;
1077         } else {
1078                 disassoc = 0;
1079                 if (time_after(jiffies,
1080                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1081                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1082                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1083                                        "current AP %s - assume out of "
1084                                        "range\n",
1085                                        sdata->dev->name, print_mac(mac, ifsta->bssid));
1086                                 disassoc = 1;
1087                                 sta_info_unlink(&sta);
1088                         } else
1089                                 ieee80211_send_probe_req(sdata, ifsta->bssid,
1090                                                          local->scan_ssid,
1091                                                          local->scan_ssid_len);
1092                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1093                 } else {
1094                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1095                         if (time_after(jiffies, ifsta->last_probe +
1096                                        IEEE80211_PROBE_INTERVAL)) {
1097                                 ifsta->last_probe = jiffies;
1098                                 ieee80211_send_probe_req(sdata, ifsta->bssid,
1099                                                          ifsta->ssid,
1100                                                          ifsta->ssid_len);
1101                         }
1102                 }
1103         }
1104
1105         rcu_read_unlock();
1106
1107         if (disassoc && sta)
1108                 sta_info_destroy(sta);
1109
1110         if (disassoc) {
1111                 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1112                 ieee80211_set_associated(sdata, ifsta, 0);
1113         } else {
1114                 mod_timer(&ifsta->timer, jiffies +
1115                                       IEEE80211_MONITORING_INTERVAL);
1116         }
1117 }
1118
1119
1120 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1121                                      u8 *ssid, size_t ssid_len)
1122 {
1123         struct ieee80211_local *local = sdata->local;
1124         struct ieee80211_supported_band *sband;
1125         struct sk_buff *skb;
1126         struct ieee80211_mgmt *mgmt;
1127         u8 *pos, *supp_rates, *esupp_rates = NULL;
1128         int i;
1129
1130         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1131         if (!skb) {
1132                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1133                        "request\n", sdata->dev->name);
1134                 return;
1135         }
1136         skb_reserve(skb, local->hw.extra_tx_headroom);
1137
1138         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1139         memset(mgmt, 0, 24);
1140         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1141                                           IEEE80211_STYPE_PROBE_REQ);
1142         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1143         if (dst) {
1144                 memcpy(mgmt->da, dst, ETH_ALEN);
1145                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1146         } else {
1147                 memset(mgmt->da, 0xff, ETH_ALEN);
1148                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1149         }
1150         pos = skb_put(skb, 2 + ssid_len);
1151         *pos++ = WLAN_EID_SSID;
1152         *pos++ = ssid_len;
1153         memcpy(pos, ssid, ssid_len);
1154
1155         supp_rates = skb_put(skb, 2);
1156         supp_rates[0] = WLAN_EID_SUPP_RATES;
1157         supp_rates[1] = 0;
1158         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1159
1160         for (i = 0; i < sband->n_bitrates; i++) {
1161                 struct ieee80211_rate *rate = &sband->bitrates[i];
1162                 if (esupp_rates) {
1163                         pos = skb_put(skb, 1);
1164                         esupp_rates[1]++;
1165                 } else if (supp_rates[1] == 8) {
1166                         esupp_rates = skb_put(skb, 3);
1167                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1168                         esupp_rates[1] = 1;
1169                         pos = &esupp_rates[2];
1170                 } else {
1171                         pos = skb_put(skb, 1);
1172                         supp_rates[1]++;
1173                 }
1174                 *pos = rate->bitrate / 5;
1175         }
1176
1177         ieee80211_sta_tx(sdata, skb, 0);
1178 }
1179
1180
1181 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1182 {
1183         if (!sdata || !sdata->default_key ||
1184             sdata->default_key->conf.alg != ALG_WEP)
1185                 return 0;
1186         return 1;
1187 }
1188
1189
1190 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1191                                      struct ieee80211_if_sta *ifsta)
1192 {
1193         printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1194         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1195         ieee80211_associate(sdata, ifsta);
1196 }
1197
1198
1199 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1200                                      struct ieee80211_if_sta *ifsta,
1201                                      struct ieee80211_mgmt *mgmt,
1202                                      size_t len)
1203 {
1204         u8 *pos;
1205         struct ieee802_11_elems elems;
1206
1207         pos = mgmt->u.auth.variable;
1208         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1209         if (!elems.challenge)
1210                 return;
1211         ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1212                             elems.challenge_len + 2, 1);
1213 }
1214
1215 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
1216                                         u8 dialog_token, u16 status, u16 policy,
1217                                         u16 buf_size, u16 timeout)
1218 {
1219         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1220         struct ieee80211_local *local = sdata->local;
1221         struct sk_buff *skb;
1222         struct ieee80211_mgmt *mgmt;
1223         u16 capab;
1224
1225         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1226
1227         if (!skb) {
1228                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1229                        "for addba resp frame\n", sdata->dev->name);
1230                 return;
1231         }
1232
1233         skb_reserve(skb, local->hw.extra_tx_headroom);
1234         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1235         memset(mgmt, 0, 24);
1236         memcpy(mgmt->da, da, ETH_ALEN);
1237         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1238         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1239                 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1240         else
1241                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1242         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1243                                           IEEE80211_STYPE_ACTION);
1244
1245         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1246         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1247         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1248         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1249
1250         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1251         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1252         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1253
1254         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1255         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1256         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1257
1258         ieee80211_sta_tx(sdata, skb, 0);
1259
1260         return;
1261 }
1262
1263 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
1264                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1265                                 u16 agg_size, u16 timeout)
1266 {
1267         struct ieee80211_local *local = sdata->local;
1268         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1269         struct sk_buff *skb;
1270         struct ieee80211_mgmt *mgmt;
1271         u16 capab;
1272
1273         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1274
1275         if (!skb) {
1276                 printk(KERN_ERR "%s: failed to allocate buffer "
1277                                 "for addba request frame\n", sdata->dev->name);
1278                 return;
1279         }
1280         skb_reserve(skb, local->hw.extra_tx_headroom);
1281         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1282         memset(mgmt, 0, 24);
1283         memcpy(mgmt->da, da, ETH_ALEN);
1284         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1285         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1286                 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1287         else
1288                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1289
1290         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1291                                           IEEE80211_STYPE_ACTION);
1292
1293         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1294
1295         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1296         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1297
1298         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1299         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1300         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1301         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1302
1303         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1304
1305         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1306         mgmt->u.action.u.addba_req.start_seq_num =
1307                                         cpu_to_le16(start_seq_num << 4);
1308
1309         ieee80211_sta_tx(sdata, skb, 0);
1310 }
1311
1312 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1313                                                 struct ieee80211_mgmt *mgmt,
1314                                                 size_t len)
1315 {
1316         struct ieee80211_hw *hw = &local->hw;
1317         struct ieee80211_conf *conf = &hw->conf;
1318         struct sta_info *sta;
1319         struct tid_ampdu_rx *tid_agg_rx;
1320         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1321         u8 dialog_token;
1322         int ret = -EOPNOTSUPP;
1323         DECLARE_MAC_BUF(mac);
1324
1325         rcu_read_lock();
1326
1327         sta = sta_info_get(local, mgmt->sa);
1328         if (!sta) {
1329                 rcu_read_unlock();
1330                 return;
1331         }
1332
1333         /* extract session parameters from addba request frame */
1334         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1335         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1336         start_seq_num =
1337                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1338
1339         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1340         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1341         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1342         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1343
1344         status = WLAN_STATUS_REQUEST_DECLINED;
1345
1346         /* sanity check for incoming parameters:
1347          * check if configuration can support the BA policy
1348          * and if buffer size does not exceeds max value */
1349         if (((ba_policy != 1)
1350                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1351                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1352                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1353 #ifdef CONFIG_MAC80211_HT_DEBUG
1354                 if (net_ratelimit())
1355                         printk(KERN_DEBUG "AddBA Req with bad params from "
1356                                 "%s on tid %u. policy %d, buffer size %d\n",
1357                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1358                                 buf_size);
1359 #endif /* CONFIG_MAC80211_HT_DEBUG */
1360                 goto end_no_lock;
1361         }
1362         /* determine default buffer size */
1363         if (buf_size == 0) {
1364                 struct ieee80211_supported_band *sband;
1365
1366                 sband = local->hw.wiphy->bands[conf->channel->band];
1367                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1368                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1369         }
1370
1371
1372         /* examine state machine */
1373         spin_lock_bh(&sta->lock);
1374
1375         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1376 #ifdef CONFIG_MAC80211_HT_DEBUG
1377                 if (net_ratelimit())
1378                         printk(KERN_DEBUG "unexpected AddBA Req from "
1379                                 "%s on tid %u\n",
1380                                 print_mac(mac, mgmt->sa), tid);
1381 #endif /* CONFIG_MAC80211_HT_DEBUG */
1382                 goto end;
1383         }
1384
1385         /* prepare A-MPDU MLME for Rx aggregation */
1386         sta->ampdu_mlme.tid_rx[tid] =
1387                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1388         if (!sta->ampdu_mlme.tid_rx[tid]) {
1389 #ifdef CONFIG_MAC80211_HT_DEBUG
1390                 if (net_ratelimit())
1391                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1392                                         tid);
1393 #endif
1394                 goto end;
1395         }
1396         /* rx timer */
1397         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1398                                 sta_rx_agg_session_timer_expired;
1399         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1400                                 (unsigned long)&sta->timer_to_tid[tid];
1401         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1402
1403         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1404
1405         /* prepare reordering buffer */
1406         tid_agg_rx->reorder_buf =
1407                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1408         if (!tid_agg_rx->reorder_buf) {
1409 #ifdef CONFIG_MAC80211_HT_DEBUG
1410                 if (net_ratelimit())
1411                         printk(KERN_ERR "can not allocate reordering buffer "
1412                                "to tid %d\n", tid);
1413 #endif
1414                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1415                 goto end;
1416         }
1417         memset(tid_agg_rx->reorder_buf, 0,
1418                 buf_size * sizeof(struct sk_buff *));
1419
1420         if (local->ops->ampdu_action)
1421                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1422                                                sta->addr, tid, &start_seq_num);
1423 #ifdef CONFIG_MAC80211_HT_DEBUG
1424         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1425 #endif /* CONFIG_MAC80211_HT_DEBUG */
1426
1427         if (ret) {
1428                 kfree(tid_agg_rx->reorder_buf);
1429                 kfree(tid_agg_rx);
1430                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1431                 goto end;
1432         }
1433
1434         /* change state and send addba resp */
1435         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1436         tid_agg_rx->dialog_token = dialog_token;
1437         tid_agg_rx->ssn = start_seq_num;
1438         tid_agg_rx->head_seq_num = start_seq_num;
1439         tid_agg_rx->buf_size = buf_size;
1440         tid_agg_rx->timeout = timeout;
1441         tid_agg_rx->stored_mpdu_num = 0;
1442         status = WLAN_STATUS_SUCCESS;
1443 end:
1444         spin_unlock_bh(&sta->lock);
1445
1446 end_no_lock:
1447         ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1448                                   dialog_token, status, 1, buf_size, timeout);
1449         rcu_read_unlock();
1450 }
1451
1452 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1453                                              struct ieee80211_mgmt *mgmt,
1454                                              size_t len)
1455 {
1456         struct ieee80211_hw *hw = &local->hw;
1457         struct sta_info *sta;
1458         u16 capab;
1459         u16 tid;
1460         u8 *state;
1461
1462         rcu_read_lock();
1463
1464         sta = sta_info_get(local, mgmt->sa);
1465         if (!sta) {
1466                 rcu_read_unlock();
1467                 return;
1468         }
1469
1470         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1471         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1472
1473         state = &sta->ampdu_mlme.tid_state_tx[tid];
1474
1475         spin_lock_bh(&sta->lock);
1476
1477         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1478                 spin_unlock_bh(&sta->lock);
1479                 goto addba_resp_exit;
1480         }
1481
1482         if (mgmt->u.action.u.addba_resp.dialog_token !=
1483                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1484                 spin_unlock_bh(&sta->lock);
1485 #ifdef CONFIG_MAC80211_HT_DEBUG
1486                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1487 #endif /* CONFIG_MAC80211_HT_DEBUG */
1488                 goto addba_resp_exit;
1489         }
1490
1491         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1492 #ifdef CONFIG_MAC80211_HT_DEBUG
1493         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1494 #endif /* CONFIG_MAC80211_HT_DEBUG */
1495         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1496                         == WLAN_STATUS_SUCCESS) {
1497                 *state |= HT_ADDBA_RECEIVED_MSK;
1498                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1499
1500                 if (*state == HT_AGG_STATE_OPERATIONAL)
1501                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1502
1503                 spin_unlock_bh(&sta->lock);
1504         } else {
1505                 sta->ampdu_mlme.addba_req_num[tid]++;
1506                 /* this will allow the state check in stop_BA_session */
1507                 *state = HT_AGG_STATE_OPERATIONAL;
1508                 spin_unlock_bh(&sta->lock);
1509                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1510                                              WLAN_BACK_INITIATOR);
1511         }
1512
1513 addba_resp_exit:
1514         rcu_read_unlock();
1515 }
1516
1517 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
1518                           u16 initiator, u16 reason_code)
1519 {
1520         struct ieee80211_local *local = sdata->local;
1521         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1522         struct sk_buff *skb;
1523         struct ieee80211_mgmt *mgmt;
1524         u16 params;
1525
1526         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1527
1528         if (!skb) {
1529                 printk(KERN_ERR "%s: failed to allocate buffer "
1530                                         "for delba frame\n", sdata->dev->name);
1531                 return;
1532         }
1533
1534         skb_reserve(skb, local->hw.extra_tx_headroom);
1535         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1536         memset(mgmt, 0, 24);
1537         memcpy(mgmt->da, da, ETH_ALEN);
1538         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1539         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1540                 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1541         else
1542                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1543         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1544                                           IEEE80211_STYPE_ACTION);
1545
1546         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1547
1548         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1549         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1550         params = (u16)(initiator << 11);        /* bit 11 initiator */
1551         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1552
1553         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1554         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1555
1556         ieee80211_sta_tx(sdata, skb, 0);
1557 }
1558
1559 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
1560 {
1561         struct ieee80211_local *local = sdata->local;
1562         struct sk_buff *skb;
1563         struct ieee80211_bar *bar;
1564         u16 bar_control = 0;
1565
1566         skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1567         if (!skb) {
1568                 printk(KERN_ERR "%s: failed to allocate buffer for "
1569                         "bar frame\n", sdata->dev->name);
1570                 return;
1571         }
1572         skb_reserve(skb, local->hw.extra_tx_headroom);
1573         bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1574         memset(bar, 0, sizeof(*bar));
1575         bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1576                                          IEEE80211_STYPE_BACK_REQ);
1577         memcpy(bar->ra, ra, ETH_ALEN);
1578         memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
1579         bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1580         bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1581         bar_control |= (u16)(tid << 12);
1582         bar->control = cpu_to_le16(bar_control);
1583         bar->start_seq_num = cpu_to_le16(ssn);
1584
1585         ieee80211_sta_tx(sdata, skb, 0);
1586 }
1587
1588 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
1589                                         u16 initiator, u16 reason)
1590 {
1591         struct ieee80211_local *local = sdata->local;
1592         struct ieee80211_hw *hw = &local->hw;
1593         struct sta_info *sta;
1594         int ret, i;
1595         DECLARE_MAC_BUF(mac);
1596
1597         rcu_read_lock();
1598
1599         sta = sta_info_get(local, ra);
1600         if (!sta) {
1601                 rcu_read_unlock();
1602                 return;
1603         }
1604
1605         /* check if TID is in operational state */
1606         spin_lock_bh(&sta->lock);
1607         if (sta->ampdu_mlme.tid_state_rx[tid]
1608                                 != HT_AGG_STATE_OPERATIONAL) {
1609                 spin_unlock_bh(&sta->lock);
1610                 rcu_read_unlock();
1611                 return;
1612         }
1613         sta->ampdu_mlme.tid_state_rx[tid] =
1614                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1615                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1616         spin_unlock_bh(&sta->lock);
1617
1618         /* stop HW Rx aggregation. ampdu_action existence
1619          * already verified in session init so we add the BUG_ON */
1620         BUG_ON(!local->ops->ampdu_action);
1621
1622 #ifdef CONFIG_MAC80211_HT_DEBUG
1623         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1624                                 print_mac(mac, ra), tid);
1625 #endif /* CONFIG_MAC80211_HT_DEBUG */
1626
1627         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1628                                         ra, tid, NULL);
1629         if (ret)
1630                 printk(KERN_DEBUG "HW problem - can not stop rx "
1631                                 "aggregation for tid %d\n", tid);
1632
1633         /* shutdown timer has not expired */
1634         if (initiator != WLAN_BACK_TIMER)
1635                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1636
1637         /* check if this is a self generated aggregation halt */
1638         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1639                 ieee80211_send_delba(sdata, ra, tid, 0, reason);
1640
1641         /* free the reordering buffer */
1642         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1643                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1644                         /* release the reordered frames */
1645                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1646                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1647                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1648                 }
1649         }
1650         /* free resources */
1651         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1652         kfree(sta->ampdu_mlme.tid_rx[tid]);
1653         sta->ampdu_mlme.tid_rx[tid] = NULL;
1654         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1655
1656         rcu_read_unlock();
1657 }
1658
1659
1660 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1661                         struct ieee80211_mgmt *mgmt, size_t len)
1662 {
1663         struct ieee80211_local *local = sdata->local;
1664         struct sta_info *sta;
1665         u16 tid, params;
1666         u16 initiator;
1667         DECLARE_MAC_BUF(mac);
1668
1669         rcu_read_lock();
1670
1671         sta = sta_info_get(local, mgmt->sa);
1672         if (!sta) {
1673                 rcu_read_unlock();
1674                 return;
1675         }
1676
1677         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1678         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1679         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1680
1681 #ifdef CONFIG_MAC80211_HT_DEBUG
1682         if (net_ratelimit())
1683                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1684                         print_mac(mac, mgmt->sa),
1685                         initiator ? "initiator" : "recipient", tid,
1686                         mgmt->u.action.u.delba.reason_code);
1687 #endif /* CONFIG_MAC80211_HT_DEBUG */
1688
1689         if (initiator == WLAN_BACK_INITIATOR)
1690                 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1691                                                  WLAN_BACK_INITIATOR, 0);
1692         else { /* WLAN_BACK_RECIPIENT */
1693                 spin_lock_bh(&sta->lock);
1694                 sta->ampdu_mlme.tid_state_tx[tid] =
1695                                 HT_AGG_STATE_OPERATIONAL;
1696                 spin_unlock_bh(&sta->lock);
1697                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1698                                              WLAN_BACK_RECIPIENT);
1699         }
1700         rcu_read_unlock();
1701 }
1702
1703 /*
1704  * After sending add Block Ack request we activated a timer until
1705  * add Block Ack response will arrive from the recipient.
1706  * If this timer expires sta_addba_resp_timer_expired will be executed.
1707  */
1708 void sta_addba_resp_timer_expired(unsigned long data)
1709 {
1710         /* not an elegant detour, but there is no choice as the timer passes
1711          * only one argument, and both sta_info and TID are needed, so init
1712          * flow in sta_info_create gives the TID as data, while the timer_to_id
1713          * array gives the sta through container_of */
1714         u16 tid = *(u8 *)data;
1715         struct sta_info *temp_sta = container_of((void *)data,
1716                 struct sta_info, timer_to_tid[tid]);
1717
1718         struct ieee80211_local *local = temp_sta->local;
1719         struct ieee80211_hw *hw = &local->hw;
1720         struct sta_info *sta;
1721         u8 *state;
1722
1723         rcu_read_lock();
1724
1725         sta = sta_info_get(local, temp_sta->addr);
1726         if (!sta) {
1727                 rcu_read_unlock();
1728                 return;
1729         }
1730
1731         state = &sta->ampdu_mlme.tid_state_tx[tid];
1732         /* check if the TID waits for addBA response */
1733         spin_lock_bh(&sta->lock);
1734         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1735                 spin_unlock_bh(&sta->lock);
1736                 *state = HT_AGG_STATE_IDLE;
1737 #ifdef CONFIG_MAC80211_HT_DEBUG
1738                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1739                                 "expecting addBA response there", tid);
1740 #endif
1741                 goto timer_expired_exit;
1742         }
1743
1744 #ifdef CONFIG_MAC80211_HT_DEBUG
1745         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1746 #endif
1747
1748         /* go through the state check in stop_BA_session */
1749         *state = HT_AGG_STATE_OPERATIONAL;
1750         spin_unlock_bh(&sta->lock);
1751         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1752                                      WLAN_BACK_INITIATOR);
1753
1754 timer_expired_exit:
1755         rcu_read_unlock();
1756 }
1757
1758 /*
1759  * After accepting the AddBA Request we activated a timer,
1760  * resetting it after each frame that arrives from the originator.
1761  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1762  */
1763 static void sta_rx_agg_session_timer_expired(unsigned long data)
1764 {
1765         /* not an elegant detour, but there is no choice as the timer passes
1766          * only one argument, and various sta_info are needed here, so init
1767          * flow in sta_info_create gives the TID as data, while the timer_to_id
1768          * array gives the sta through container_of */
1769         u8 *ptid = (u8 *)data;
1770         u8 *timer_to_id = ptid - *ptid;
1771         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1772                                          timer_to_tid[0]);
1773
1774 #ifdef CONFIG_MAC80211_HT_DEBUG
1775         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1776 #endif
1777         ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1778                                          (u16)*ptid, WLAN_BACK_TIMER,
1779                                          WLAN_REASON_QSTA_TIMEOUT);
1780 }
1781
1782 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
1783 {
1784         struct ieee80211_local *local = sdata->local;
1785         int i;
1786
1787         for (i = 0; i <  STA_TID_NUM; i++) {
1788                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1789                                              WLAN_BACK_INITIATOR);
1790                 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
1791                                                  WLAN_BACK_RECIPIENT,
1792                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1793         }
1794 }
1795
1796 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
1797                                         struct ieee80211_msrment_ie *request_ie,
1798                                         const u8 *da, const u8 *bssid,
1799                                         u8 dialog_token)
1800 {
1801         struct ieee80211_local *local = sdata->local;
1802         struct sk_buff *skb;
1803         struct ieee80211_mgmt *msr_report;
1804
1805         skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1806                                 sizeof(struct ieee80211_msrment_ie));
1807
1808         if (!skb) {
1809                 printk(KERN_ERR "%s: failed to allocate buffer for "
1810                                 "measurement report frame\n", sdata->dev->name);
1811                 return;
1812         }
1813
1814         skb_reserve(skb, local->hw.extra_tx_headroom);
1815         msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1816         memset(msr_report, 0, 24);
1817         memcpy(msr_report->da, da, ETH_ALEN);
1818         memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
1819         memcpy(msr_report->bssid, bssid, ETH_ALEN);
1820         msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1821                                                 IEEE80211_STYPE_ACTION);
1822
1823         skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1824         msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1825         msr_report->u.action.u.measurement.action_code =
1826                                 WLAN_ACTION_SPCT_MSR_RPRT;
1827         msr_report->u.action.u.measurement.dialog_token = dialog_token;
1828
1829         msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1830         msr_report->u.action.u.measurement.length =
1831                         sizeof(struct ieee80211_msrment_ie);
1832
1833         memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1834                 sizeof(struct ieee80211_msrment_ie));
1835         msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1836         msr_report->u.action.u.measurement.msr_elem.mode |=
1837                         IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1838         msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1839
1840         ieee80211_sta_tx(sdata, skb, 0);
1841 }
1842
1843 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1844                                                 struct ieee80211_mgmt *mgmt,
1845                                                 size_t len)
1846 {
1847         /*
1848          * Ignoring measurement request is spec violation.
1849          * Mandatory measurements must be reported optional
1850          * measurements might be refused or reported incapable
1851          * For now just refuse
1852          * TODO: Answer basic measurement as unmeasured
1853          */
1854         ieee80211_send_refuse_measurement_request(sdata,
1855                         &mgmt->u.action.u.measurement.msr_elem,
1856                         mgmt->sa, mgmt->bssid,
1857                         mgmt->u.action.u.measurement.dialog_token);
1858 }
1859
1860
1861 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1862                                    struct ieee80211_if_sta *ifsta,
1863                                    struct ieee80211_mgmt *mgmt,
1864                                    size_t len)
1865 {
1866         u16 auth_alg, auth_transaction, status_code;
1867         DECLARE_MAC_BUF(mac);
1868
1869         if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1870             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1871                 return;
1872
1873         if (len < 24 + 6)
1874                 return;
1875
1876         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1877             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1878                 return;
1879
1880         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1881             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1882                 return;
1883
1884         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1885         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1886         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1887
1888         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1889                 /*
1890                  * IEEE 802.11 standard does not require authentication in IBSS
1891                  * networks and most implementations do not seem to use it.
1892                  * However, try to reply to authentication attempts if someone
1893                  * has actually implemented this.
1894                  */
1895                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1896                         return;
1897                 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1898         }
1899
1900         if (auth_alg != ifsta->auth_alg ||
1901             auth_transaction != ifsta->auth_transaction)
1902                 return;
1903
1904         if (status_code != WLAN_STATUS_SUCCESS) {
1905                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1906                         u8 algs[3];
1907                         const int num_algs = ARRAY_SIZE(algs);
1908                         int i, pos;
1909                         algs[0] = algs[1] = algs[2] = 0xff;
1910                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1911                                 algs[0] = WLAN_AUTH_OPEN;
1912                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1913                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1914                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1915                                 algs[2] = WLAN_AUTH_LEAP;
1916                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1917                                 pos = 0;
1918                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1919                                 pos = 1;
1920                         else
1921                                 pos = 2;
1922                         for (i = 0; i < num_algs; i++) {
1923                                 pos++;
1924                                 if (pos >= num_algs)
1925                                         pos = 0;
1926                                 if (algs[pos] == ifsta->auth_alg ||
1927                                     algs[pos] == 0xff)
1928                                         continue;
1929                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1930                                     !ieee80211_sta_wep_configured(sdata))
1931                                         continue;
1932                                 ifsta->auth_alg = algs[pos];
1933                                 break;
1934                         }
1935                 }
1936                 return;
1937         }
1938
1939         switch (ifsta->auth_alg) {
1940         case WLAN_AUTH_OPEN:
1941         case WLAN_AUTH_LEAP:
1942                 ieee80211_auth_completed(sdata, ifsta);
1943                 break;
1944         case WLAN_AUTH_SHARED_KEY:
1945                 if (ifsta->auth_transaction == 4)
1946                         ieee80211_auth_completed(sdata, ifsta);
1947                 else
1948                         ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1949                 break;
1950         }
1951 }
1952
1953
1954 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1955                                      struct ieee80211_if_sta *ifsta,
1956                                      struct ieee80211_mgmt *mgmt,
1957                                      size_t len)
1958 {
1959         u16 reason_code;
1960         DECLARE_MAC_BUF(mac);
1961
1962         if (len < 24 + 2)
1963                 return;
1964
1965         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1966                 return;
1967
1968         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1969
1970         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1971                 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1972
1973         if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1974             ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1975             ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1976                 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1977                 mod_timer(&ifsta->timer, jiffies +
1978                                       IEEE80211_RETRY_AUTH_INTERVAL);
1979         }
1980
1981         ieee80211_set_disassoc(sdata, ifsta, 1);
1982         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1983 }
1984
1985
1986 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1987                                        struct ieee80211_if_sta *ifsta,
1988                                        struct ieee80211_mgmt *mgmt,
1989                                        size_t len)
1990 {
1991         u16 reason_code;
1992         DECLARE_MAC_BUF(mac);
1993
1994         if (len < 24 + 2)
1995                 return;
1996
1997         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1998                 return;
1999
2000         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2001
2002         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
2003                 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
2004
2005         if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
2006                 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
2007                 mod_timer(&ifsta->timer, jiffies +
2008                                       IEEE80211_RETRY_AUTH_INTERVAL);
2009         }
2010
2011         ieee80211_set_disassoc(sdata, ifsta, 0);
2012 }
2013
2014
2015 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2016                                          struct ieee80211_if_sta *ifsta,
2017                                          struct ieee80211_mgmt *mgmt,
2018                                          size_t len,
2019                                          int reassoc)
2020 {
2021         struct ieee80211_local *local = sdata->local;
2022         struct ieee80211_supported_band *sband;
2023         struct sta_info *sta;
2024         u64 rates, basic_rates;
2025         u16 capab_info, status_code, aid;
2026         struct ieee802_11_elems elems;
2027         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2028         u8 *pos;
2029         int i, j;
2030         DECLARE_MAC_BUF(mac);
2031         bool have_higher_than_11mbit = false;
2032
2033         /* AssocResp and ReassocResp have identical structure, so process both
2034          * of them in this function. */
2035
2036         if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
2037                 return;
2038
2039         if (len < 24 + 6)
2040                 return;
2041
2042         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
2043                 return;
2044
2045         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2046         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2047         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2048
2049         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2050                "status=%d aid=%d)\n",
2051                sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2052                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2053
2054         if (status_code != WLAN_STATUS_SUCCESS) {
2055                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2056                        sdata->dev->name, status_code);
2057                 /* if this was a reassociation, ensure we try a "full"
2058                  * association next time. This works around some broken APs
2059                  * which do not correctly reject reassociation requests. */
2060                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2061                 return;
2062         }
2063
2064         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2065                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2066                        "set\n", sdata->dev->name, aid);
2067         aid &= ~(BIT(15) | BIT(14));
2068
2069         pos = mgmt->u.assoc_resp.variable;
2070         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2071
2072         if (!elems.supp_rates) {
2073                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2074                        sdata->dev->name);
2075                 return;
2076         }
2077
2078         printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
2079         ifsta->aid = aid;
2080         ifsta->ap_capab = capab_info;
2081
2082         kfree(ifsta->assocresp_ies);
2083         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2084         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2085         if (ifsta->assocresp_ies)
2086                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2087
2088         rcu_read_lock();
2089
2090         /* Add STA entry for the AP */
2091         sta = sta_info_get(local, ifsta->bssid);
2092         if (!sta) {
2093                 struct ieee80211_sta_bss *bss;
2094                 int err;
2095
2096                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2097                 if (!sta) {
2098                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2099                                " the AP\n", sdata->dev->name);
2100                         rcu_read_unlock();
2101                         return;
2102                 }
2103                 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
2104                                            local->hw.conf.channel->center_freq,
2105                                            ifsta->ssid, ifsta->ssid_len);
2106                 if (bss) {
2107                         sta->last_signal = bss->signal;
2108                         sta->last_qual = bss->qual;
2109                         sta->last_noise = bss->noise;
2110                         ieee80211_rx_bss_put(local, bss);
2111                 }
2112
2113                 err = sta_info_insert(sta);
2114                 if (err) {
2115                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2116                                " the AP (error %d)\n", sdata->dev->name, err);
2117                         rcu_read_unlock();
2118                         return;
2119                 }
2120                 /* update new sta with its last rx activity */
2121                 sta->last_rx = jiffies;
2122         }
2123
2124         /*
2125          * FIXME: Do we really need to update the sta_info's information here?
2126          *        We already know about the AP (we found it in our list) so it
2127          *        should already be filled with the right info, no?
2128          *        As is stands, all this is racy because typically we assume
2129          *        the information that is filled in here (except flags) doesn't
2130          *        change while a STA structure is alive. As such, it should move
2131          *        to between the sta_info_alloc() and sta_info_insert() above.
2132          */
2133
2134         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2135                            WLAN_STA_AUTHORIZED);
2136
2137         rates = 0;
2138         basic_rates = 0;
2139         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2140
2141         for (i = 0; i < elems.supp_rates_len; i++) {
2142                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2143
2144                 if (rate > 110)
2145                         have_higher_than_11mbit = true;
2146
2147                 for (j = 0; j < sband->n_bitrates; j++) {
2148                         if (sband->bitrates[j].bitrate == rate)
2149                                 rates |= BIT(j);
2150                         if (elems.supp_rates[i] & 0x80)
2151                                 basic_rates |= BIT(j);
2152                 }
2153         }
2154
2155         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2156                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2157
2158                 if (rate > 110)
2159                         have_higher_than_11mbit = true;
2160
2161                 for (j = 0; j < sband->n_bitrates; j++) {
2162                         if (sband->bitrates[j].bitrate == rate)
2163                                 rates |= BIT(j);
2164                         if (elems.ext_supp_rates[i] & 0x80)
2165                                 basic_rates |= BIT(j);
2166                 }
2167         }
2168
2169         sta->supp_rates[local->hw.conf.channel->band] = rates;
2170         sdata->basic_rates = basic_rates;
2171
2172         /* cf. IEEE 802.11 9.2.12 */
2173         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2174             have_higher_than_11mbit)
2175                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2176         else
2177                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2178
2179         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2180             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2181                 struct ieee80211_ht_bss_info bss_info;
2182                 ieee80211_ht_cap_ie_to_ht_info(
2183                                 (struct ieee80211_ht_cap *)
2184                                 elems.ht_cap_elem, &sta->ht_info);
2185                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2186                                 (struct ieee80211_ht_addt_info *)
2187                                 elems.ht_info_elem, &bss_info);
2188                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2189         }
2190
2191         rate_control_rate_init(sta, local);
2192
2193         if (elems.wmm_param) {
2194                 set_sta_flags(sta, WLAN_STA_WME);
2195                 rcu_read_unlock();
2196                 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2197                                          elems.wmm_param_len);
2198         } else
2199                 rcu_read_unlock();
2200
2201         /* set AID and assoc capability,
2202          * ieee80211_set_associated() will tell the driver */
2203         bss_conf->aid = aid;
2204         bss_conf->assoc_capability = capab_info;
2205         ieee80211_set_associated(sdata, ifsta, 1);
2206
2207         ieee80211_associated(sdata, ifsta);
2208 }
2209
2210
2211 /* Caller must hold local->sta_bss_lock */
2212 static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
2213                                         struct ieee80211_sta_bss *bss)
2214 {
2215         u8 hash_idx;
2216
2217         if (bss_mesh_cfg(bss))
2218                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2219                                         bss_mesh_id_len(bss));
2220         else
2221                 hash_idx = STA_HASH(bss->bssid);
2222
2223         bss->hnext = local->sta_bss_hash[hash_idx];
2224         local->sta_bss_hash[hash_idx] = bss;
2225 }
2226
2227
2228 /* Caller must hold local->sta_bss_lock */
2229 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2230                                         struct ieee80211_sta_bss *bss)
2231 {
2232         struct ieee80211_sta_bss *b, *prev = NULL;
2233         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2234         while (b) {
2235                 if (b == bss) {
2236                         if (!prev)
2237                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2238                                         bss->hnext;
2239                         else
2240                                 prev->hnext = bss->hnext;
2241                         break;
2242                 }
2243                 prev = b;
2244                 b = b->hnext;
2245         }
2246 }
2247
2248
2249 static struct ieee80211_sta_bss *
2250 ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
2251                      u8 *ssid, u8 ssid_len)
2252 {
2253         struct ieee80211_local *local = sdata->local;
2254         struct ieee80211_sta_bss *bss;
2255
2256         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2257         if (!bss)
2258                 return NULL;
2259         atomic_inc(&bss->users);
2260         atomic_inc(&bss->users);
2261         memcpy(bss->bssid, bssid, ETH_ALEN);
2262         bss->freq = freq;
2263         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2264                 memcpy(bss->ssid, ssid, ssid_len);
2265                 bss->ssid_len = ssid_len;
2266         }
2267
2268         spin_lock_bh(&local->sta_bss_lock);
2269         /* TODO: order by RSSI? */
2270         list_add_tail(&bss->list, &local->sta_bss_list);
2271         __ieee80211_rx_bss_hash_add(local, bss);
2272         spin_unlock_bh(&local->sta_bss_lock);
2273         return bss;
2274 }
2275
2276 static struct ieee80211_sta_bss *
2277 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
2278                      u8 *ssid, u8 ssid_len)
2279 {
2280         struct ieee80211_sta_bss *bss;
2281
2282         spin_lock_bh(&local->sta_bss_lock);
2283         bss = local->sta_bss_hash[STA_HASH(bssid)];
2284         while (bss) {
2285                 if (!bss_mesh_cfg(bss) &&
2286                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2287                     bss->freq == freq &&
2288                     bss->ssid_len == ssid_len &&
2289                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2290                         atomic_inc(&bss->users);
2291                         break;
2292                 }
2293                 bss = bss->hnext;
2294         }
2295         spin_unlock_bh(&local->sta_bss_lock);
2296         return bss;
2297 }
2298
2299 #ifdef CONFIG_MAC80211_MESH
2300 static struct ieee80211_sta_bss *
2301 ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2302                           u8 *mesh_cfg, int freq)
2303 {
2304         struct ieee80211_sta_bss *bss;
2305
2306         spin_lock_bh(&local->sta_bss_lock);
2307         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2308         while (bss) {
2309                 if (bss_mesh_cfg(bss) &&
2310                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2311                     bss->freq == freq &&
2312                     mesh_id_len == bss->mesh_id_len &&
2313                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2314                                                  mesh_id_len))) {
2315                         atomic_inc(&bss->users);
2316                         break;
2317                 }
2318                 bss = bss->hnext;
2319         }
2320         spin_unlock_bh(&local->sta_bss_lock);
2321         return bss;
2322 }
2323
2324 static struct ieee80211_sta_bss *
2325 ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2326                           u8 *mesh_cfg, int mesh_config_len, int freq)
2327 {
2328         struct ieee80211_sta_bss *bss;
2329
2330         if (mesh_config_len != MESH_CFG_LEN)
2331                 return NULL;
2332
2333         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2334         if (!bss)
2335                 return NULL;
2336
2337         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2338         if (!bss->mesh_cfg) {
2339                 kfree(bss);
2340                 return NULL;
2341         }
2342
2343         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2344                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2345                 if (!bss->mesh_id) {
2346                         kfree(bss->mesh_cfg);
2347                         kfree(bss);
2348                         return NULL;
2349                 }
2350                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2351         }
2352
2353         atomic_inc(&bss->users);
2354         atomic_inc(&bss->users);
2355         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2356         bss->mesh_id_len = mesh_id_len;
2357         bss->freq = freq;
2358         spin_lock_bh(&local->sta_bss_lock);
2359         /* TODO: order by RSSI? */
2360         list_add_tail(&bss->list, &local->sta_bss_list);
2361         __ieee80211_rx_bss_hash_add(local, bss);
2362         spin_unlock_bh(&local->sta_bss_lock);
2363         return bss;
2364 }
2365 #endif
2366
2367 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2368 {
2369         kfree(bss->ies);
2370         kfree(bss_mesh_id(bss));
2371         kfree(bss_mesh_cfg(bss));
2372         kfree(bss);
2373 }
2374
2375
2376 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2377                                  struct ieee80211_sta_bss *bss)
2378 {
2379         local_bh_disable();
2380         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2381                 local_bh_enable();
2382                 return;
2383         }
2384
2385         __ieee80211_rx_bss_hash_del(local, bss);
2386         list_del(&bss->list);
2387         spin_unlock_bh(&local->sta_bss_lock);
2388         ieee80211_rx_bss_free(bss);
2389 }
2390
2391
2392 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2393 {
2394         spin_lock_init(&local->sta_bss_lock);
2395         INIT_LIST_HEAD(&local->sta_bss_list);
2396 }
2397
2398
2399 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2400 {
2401         struct ieee80211_sta_bss *bss, *tmp;
2402
2403         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2404                 ieee80211_rx_bss_put(local, bss);
2405 }
2406
2407
2408 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
2409                                    struct ieee80211_if_sta *ifsta,
2410                                    struct ieee80211_sta_bss *bss)
2411 {
2412         struct ieee80211_local *local = sdata->local;
2413         int res, rates, i, j;
2414         struct sk_buff *skb;
2415         struct ieee80211_mgmt *mgmt;
2416         u8 *pos;
2417         struct ieee80211_supported_band *sband;
2418         union iwreq_data wrqu;
2419
2420         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2421
2422         /* Remove possible STA entries from other IBSS networks. */
2423         sta_info_flush_delayed(sdata);
2424
2425         if (local->ops->reset_tsf) {
2426                 /* Reset own TSF to allow time synchronization work. */
2427                 local->ops->reset_tsf(local_to_hw(local));
2428         }
2429         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2430         res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2431         if (res)
2432                 return res;
2433
2434         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2435
2436         sdata->drop_unencrypted = bss->capability &
2437                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2438
2439         res = ieee80211_set_freq(sdata, bss->freq);
2440
2441         if (res)
2442                 return res;
2443
2444         /* Build IBSS probe response */
2445         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2446         if (skb) {
2447                 skb_reserve(skb, local->hw.extra_tx_headroom);
2448
2449                 mgmt = (struct ieee80211_mgmt *)
2450                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2451                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2452                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2453                                                   IEEE80211_STYPE_PROBE_RESP);
2454                 memset(mgmt->da, 0xff, ETH_ALEN);
2455                 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
2456                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2457                 mgmt->u.beacon.beacon_int =
2458                         cpu_to_le16(local->hw.conf.beacon_int);
2459                 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2460                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2461
2462                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2463                 *pos++ = WLAN_EID_SSID;
2464                 *pos++ = ifsta->ssid_len;
2465                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2466
2467                 rates = bss->supp_rates_len;
2468                 if (rates > 8)
2469                         rates = 8;
2470                 pos = skb_put(skb, 2 + rates);
2471                 *pos++ = WLAN_EID_SUPP_RATES;
2472                 *pos++ = rates;
2473                 memcpy(pos, bss->supp_rates, rates);
2474
2475                 if (bss->band == IEEE80211_BAND_2GHZ) {
2476                         pos = skb_put(skb, 2 + 1);
2477                         *pos++ = WLAN_EID_DS_PARAMS;
2478                         *pos++ = 1;
2479                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2480                 }
2481
2482                 pos = skb_put(skb, 2 + 2);
2483                 *pos++ = WLAN_EID_IBSS_PARAMS;
2484                 *pos++ = 2;
2485                 /* FIX: set ATIM window based on scan results */
2486                 *pos++ = 0;
2487                 *pos++ = 0;
2488
2489                 if (bss->supp_rates_len > 8) {
2490                         rates = bss->supp_rates_len - 8;
2491                         pos = skb_put(skb, 2 + rates);
2492                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2493                         *pos++ = rates;
2494                         memcpy(pos, &bss->supp_rates[8], rates);
2495                 }
2496
2497                 ifsta->probe_resp = skb;
2498
2499                 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2500         }
2501
2502         rates = 0;
2503         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2504         for (i = 0; i < bss->supp_rates_len; i++) {
2505                 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2506                 for (j = 0; j < sband->n_bitrates; j++)
2507                         if (sband->bitrates[j].bitrate == bitrate)
2508                                 rates |= BIT(j);
2509         }
2510         ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2511
2512         ieee80211_sta_def_wmm_params(sdata, bss, 1);
2513
2514         ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
2515         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2516
2517         memset(&wrqu, 0, sizeof(wrqu));
2518         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2519         wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
2520
2521         return res;
2522 }
2523
2524 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2525                             struct ieee802_11_elems *elems,
2526                             enum ieee80211_band band)
2527 {
2528         struct ieee80211_supported_band *sband;
2529         struct ieee80211_rate *bitrates;
2530         size_t num_rates;
2531         u64 supp_rates;
2532         int i, j;
2533         sband = local->hw.wiphy->bands[band];
2534
2535         if (!sband) {
2536                 WARN_ON(1);
2537                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2538         }
2539
2540         bitrates = sband->bitrates;
2541         num_rates = sband->n_bitrates;
2542         supp_rates = 0;
2543         for (i = 0; i < elems->supp_rates_len +
2544                      elems->ext_supp_rates_len; i++) {
2545                 u8 rate = 0;
2546                 int own_rate;
2547                 if (i < elems->supp_rates_len)
2548                         rate = elems->supp_rates[i];
2549                 else if (elems->ext_supp_rates)
2550                         rate = elems->ext_supp_rates
2551                                 [i - elems->supp_rates_len];
2552                 own_rate = 5 * (rate & 0x7f);
2553                 for (j = 0; j < num_rates; j++)
2554                         if (bitrates[j].bitrate == own_rate)
2555                                 supp_rates |= BIT(j);
2556         }
2557         return supp_rates;
2558 }
2559
2560 static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2561                                         enum ieee80211_band band)
2562 {
2563         struct ieee80211_supported_band *sband;
2564         struct ieee80211_rate *bitrates;
2565         u64 mandatory_rates;
2566         enum ieee80211_rate_flags mandatory_flag;
2567         int i;
2568
2569         sband = local->hw.wiphy->bands[band];
2570         if (!sband) {
2571                 WARN_ON(1);
2572                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2573         }
2574
2575         if (band == IEEE80211_BAND_2GHZ)
2576                 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2577         else
2578                 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2579
2580         bitrates = sband->bitrates;
2581         mandatory_rates = 0;
2582         for (i = 0; i < sband->n_bitrates; i++)
2583                 if (bitrates[i].flags & mandatory_flag)
2584                         mandatory_rates |= BIT(i);
2585         return mandatory_rates;
2586 }
2587
2588 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2589                                   struct ieee80211_mgmt *mgmt,
2590                                   size_t len,
2591                                   struct ieee80211_rx_status *rx_status,
2592                                   struct ieee802_11_elems *elems)
2593 {
2594         struct ieee80211_local *local = sdata->local;
2595         int freq, clen;
2596         struct ieee80211_sta_bss *bss;
2597         struct sta_info *sta;
2598         struct ieee80211_channel *channel;
2599         u64 beacon_timestamp, rx_timestamp;
2600         u64 supp_rates = 0;
2601         bool beacon = ieee80211_is_beacon(mgmt->frame_control);
2602         enum ieee80211_band band = rx_status->band;
2603         DECLARE_MAC_BUF(mac);
2604         DECLARE_MAC_BUF(mac2);
2605
2606         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2607
2608         if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2609             elems->mesh_config && mesh_matches_local(elems, sdata)) {
2610                 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2611
2612                 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
2613                                       mesh_peer_accepts_plinks(elems));
2614         }
2615
2616         rcu_read_lock();
2617
2618         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2619             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2620
2621                 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2622
2623                 sta = sta_info_get(local, mgmt->sa);
2624                 if (sta) {
2625                         u64 prev_rates;
2626
2627                         prev_rates = sta->supp_rates[band];
2628                         /* make sure mandatory rates are always added */
2629                         sta->supp_rates[band] = supp_rates |
2630                                 ieee80211_sta_get_mandatory_rates(local, band);
2631
2632 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2633                         if (sta->supp_rates[band] != prev_rates)
2634                                 printk(KERN_DEBUG "%s: updated supp_rates set "
2635                                     "for %s based on beacon info (0x%llx | "
2636                                     "0x%llx -> 0x%llx)\n",
2637                                     sdata->dev->name, print_mac(mac, sta->addr),
2638                                     (unsigned long long) prev_rates,
2639                                     (unsigned long long) supp_rates,
2640                                     (unsigned long long) sta->supp_rates[band]);
2641 #endif
2642                 } else {
2643                         ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2644                                                mgmt->sa, supp_rates);
2645                 }
2646         }
2647
2648         rcu_read_unlock();
2649
2650         if (elems->ds_params && elems->ds_params_len == 1)
2651                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2652         else
2653                 freq = rx_status->freq;
2654
2655         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2656
2657         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2658                 return;
2659
2660 #ifdef CONFIG_MAC80211_MESH
2661         if (elems->mesh_config)
2662                 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
2663                                 elems->mesh_id_len, elems->mesh_config, freq);
2664         else
2665 #endif
2666                 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
2667                                            elems->ssid, elems->ssid_len);
2668         if (!bss) {
2669 #ifdef CONFIG_MAC80211_MESH
2670                 if (elems->mesh_config)
2671                         bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
2672                                 elems->mesh_id_len, elems->mesh_config,
2673                                 elems->mesh_config_len, freq);
2674                 else
2675 #endif
2676                         bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
2677                                                   elems->ssid, elems->ssid_len);
2678                 if (!bss)
2679                         return;
2680         } else {
2681 #if 0
2682                 /* TODO: order by RSSI? */
2683                 spin_lock_bh(&local->sta_bss_lock);
2684                 list_move_tail(&bss->list, &local->sta_bss_list);
2685                 spin_unlock_bh(&local->sta_bss_lock);
2686 #endif
2687         }
2688
2689         /* save the ERP value so that it is available at association time */
2690         if (elems->erp_info && elems->erp_info_len >= 1) {
2691                 bss->erp_value = elems->erp_info[0];
2692                 bss->has_erp_value = 1;
2693         }
2694
2695         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2696         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2697
2698         if (elems->tim) {
2699                 struct ieee80211_tim_ie *tim_ie =
2700                         (struct ieee80211_tim_ie *)elems->tim;
2701                 bss->dtim_period = tim_ie->dtim_period;
2702         }
2703
2704         /* set default value for buggy APs */
2705         if (!elems->tim || bss->dtim_period == 0)
2706                 bss->dtim_period = 1;
2707
2708         bss->supp_rates_len = 0;
2709         if (elems->supp_rates) {
2710                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2711                 if (clen > elems->supp_rates_len)
2712                         clen = elems->supp_rates_len;
2713                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2714                        clen);
2715                 bss->supp_rates_len += clen;
2716         }
2717         if (elems->ext_supp_rates) {
2718                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2719                 if (clen > elems->ext_supp_rates_len)
2720                         clen = elems->ext_supp_rates_len;
2721                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2722                        elems->ext_supp_rates, clen);
2723                 bss->supp_rates_len += clen;
2724         }
2725
2726         bss->band = band;
2727
2728         bss->timestamp = beacon_timestamp;
2729         bss->last_update = jiffies;
2730         bss->signal = rx_status->signal;
2731         bss->noise = rx_status->noise;
2732         bss->qual = rx_status->qual;
2733         if (!beacon)
2734                 bss->last_probe_resp = jiffies;
2735         /*
2736          * In STA mode, the remaining parameters should not be overridden
2737          * by beacons because they're not necessarily accurate there.
2738          */
2739         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2740             bss->last_probe_resp && beacon) {
2741                 ieee80211_rx_bss_put(local, bss);
2742                 return;
2743         }
2744
2745         if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2746                 kfree(bss->ies);
2747                 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
2748         }
2749         if (bss->ies) {
2750                 memcpy(bss->ies, elems->ie_start, elems->total_len);
2751                 bss->ies_len = elems->total_len;
2752         } else
2753                 bss->ies_len = 0;
2754
2755         bss->wmm_used = elems->wmm_param || elems->wmm_info;
2756
2757         /* check if we need to merge IBSS */
2758         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2759             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2760             bss->capability & WLAN_CAPABILITY_IBSS &&
2761             bss->freq == local->oper_channel->center_freq &&
2762             elems->ssid_len == sdata->u.sta.ssid_len &&
2763             memcmp(elems->ssid, sdata->u.sta.ssid,
2764                                 sdata->u.sta.ssid_len) == 0) {
2765                 if (rx_status->flag & RX_FLAG_TSFT) {
2766                         /* in order for correct IBSS merging we need mactime
2767                          *
2768                          * since mactime is defined as the time the first data
2769                          * symbol of the frame hits the PHY, and the timestamp
2770                          * of the beacon is defined as "the time that the data
2771                          * symbol containing the first bit of the timestamp is
2772                          * transmitted to the PHY plus the transmitting STA’s
2773                          * delays through its local PHY from the MAC-PHY
2774                          * interface to its interface with the WM"
2775                          * (802.11 11.1.2) - equals the time this bit arrives at
2776                          * the receiver - we have to take into account the
2777                          * offset between the two.
2778                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2779                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2780                          */
2781                         int rate = local->hw.wiphy->bands[band]->
2782                                         bitrates[rx_status->rate_idx].bitrate;
2783                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2784                 } else if (local && local->ops && local->ops->get_tsf)
2785                         /* second best option: get current TSF */
2786                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2787                 else
2788                         /* can't merge without knowing the TSF */
2789                         rx_timestamp = -1LLU;
2790 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2791                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2792                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2793                        print_mac(mac, mgmt->sa),
2794                        print_mac(mac2, mgmt->bssid),
2795                        (unsigned long long)rx_timestamp,
2796                        (unsigned long long)beacon_timestamp,
2797                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2798                        jiffies);
2799 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2800                 if (beacon_timestamp > rx_timestamp) {
2801 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2802                         printk(KERN_DEBUG "%s: beacon TSF higher than "
2803                                "local TSF - IBSS merge with BSSID %s\n",
2804                                sdata->dev->name, print_mac(mac, mgmt->bssid));
2805 #endif
2806                         ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2807                         ieee80211_ibss_add_sta(sdata, NULL,
2808                                                mgmt->bssid, mgmt->sa,
2809                                                supp_rates);
2810                 }
2811         }
2812
2813         ieee80211_rx_bss_put(local, bss);
2814 }
2815
2816
2817 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2818                                          struct ieee80211_mgmt *mgmt,
2819                                          size_t len,
2820                                          struct ieee80211_rx_status *rx_status)
2821 {
2822         size_t baselen;
2823         struct ieee802_11_elems elems;
2824         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2825
2826         if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2827                 return; /* ignore ProbeResp to foreign address */
2828
2829         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2830         if (baselen > len)
2831                 return;
2832
2833         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2834                                 &elems);
2835
2836         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2837
2838         /* direct probe may be part of the association flow */
2839         if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2840                                                         &ifsta->request)) {
2841                 printk(KERN_DEBUG "%s direct probe responded\n",
2842                        sdata->dev->name);
2843                 ieee80211_authenticate(sdata, ifsta);
2844         }
2845 }
2846
2847
2848 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2849                                      struct ieee80211_mgmt *mgmt,
2850                                      size_t len,
2851                                      struct ieee80211_rx_status *rx_status)
2852 {
2853         struct ieee80211_if_sta *ifsta;
2854         size_t baselen;
2855         struct ieee802_11_elems elems;
2856         struct ieee80211_local *local = sdata->local;
2857         struct ieee80211_conf *conf = &local->hw.conf;
2858         u32 changed = 0;
2859
2860         /* Process beacon from the current BSS */
2861         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2862         if (baselen > len)
2863                 return;
2864
2865         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2866
2867         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2868
2869         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2870                 return;
2871         ifsta = &sdata->u.sta;
2872
2873         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2874             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2875                 return;
2876
2877         ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2878                                  elems.wmm_param_len);
2879
2880         /* Do not send changes to driver if we are scanning. This removes
2881          * requirement that driver's bss_info_changed function needs to be
2882          * atomic. */
2883         if (local->sta_sw_scanning || local->sta_hw_scanning)
2884                 return;
2885
2886         if (elems.erp_info && elems.erp_info_len >= 1)
2887                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2888         else {
2889                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2890                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2891                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2892         }
2893
2894         if (elems.ht_cap_elem && elems.ht_info_elem &&
2895             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2896                 struct ieee80211_ht_bss_info bss_info;
2897
2898                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2899                                 (struct ieee80211_ht_addt_info *)
2900                                 elems.ht_info_elem, &bss_info);
2901                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2902                                                &bss_info);
2903         }
2904
2905         ieee80211_bss_info_change_notify(sdata, changed);
2906 }
2907
2908
2909 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2910                                         struct ieee80211_if_sta *ifsta,
2911                                         struct ieee80211_mgmt *mgmt,
2912                                         size_t len,
2913                                         struct ieee80211_rx_status *rx_status)
2914 {
2915         struct ieee80211_local *local = sdata->local;
2916         int tx_last_beacon;
2917         struct sk_buff *skb;
2918         struct ieee80211_mgmt *resp;
2919         u8 *pos, *end;
2920         DECLARE_MAC_BUF(mac);
2921 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2922         DECLARE_MAC_BUF(mac2);
2923         DECLARE_MAC_BUF(mac3);
2924 #endif
2925
2926         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2927             ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2928             len < 24 + 2 || !ifsta->probe_resp)
2929                 return;
2930
2931         if (local->ops->tx_last_beacon)
2932                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2933         else
2934                 tx_last_beacon = 1;
2935
2936 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2937         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2938                "%s (tx_last_beacon=%d)\n",
2939                sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2940                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2941 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2942
2943         if (!tx_last_beacon)
2944                 return;
2945
2946         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2947             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2948                 return;
2949
2950         end = ((u8 *) mgmt) + len;
2951         pos = mgmt->u.probe_req.variable;
2952         if (pos[0] != WLAN_EID_SSID ||
2953             pos + 2 + pos[1] > end) {
2954 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2955                 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2956                        "from %s\n",
2957                        sdata->dev->name, print_mac(mac, mgmt->sa));
2958 #endif
2959                 return;
2960         }
2961         if (pos[1] != 0 &&
2962             (pos[1] != ifsta->ssid_len ||
2963              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2964                 /* Ignore ProbeReq for foreign SSID */
2965                 return;
2966         }
2967
2968         /* Reply with ProbeResp */
2969         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2970         if (!skb)
2971                 return;
2972
2973         resp = (struct ieee80211_mgmt *) skb->data;
2974         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2975 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2976         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2977                sdata->dev->name, print_mac(mac, resp->da));
2978 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2979         ieee80211_sta_tx(sdata, skb, 0);
2980 }
2981
2982 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2983                                      struct ieee80211_if_sta *ifsta,
2984                                      struct ieee80211_mgmt *mgmt,
2985                                      size_t len,
2986                                      struct ieee80211_rx_status *rx_status)
2987 {
2988         struct ieee80211_local *local = sdata->local;
2989
2990         if (len < IEEE80211_MIN_ACTION_SIZE)
2991                 return;
2992
2993         switch (mgmt->u.action.category) {
2994         case WLAN_CATEGORY_SPECTRUM_MGMT:
2995                 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2996                         break;
2997                 switch (mgmt->u.action.u.chan_switch.action_code) {
2998                 case WLAN_ACTION_SPCT_MSR_REQ:
2999                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3000                                    sizeof(mgmt->u.action.u.measurement)))
3001                                 break;
3002                         ieee80211_sta_process_measurement_req(sdata, mgmt, len);
3003                         break;
3004                 }
3005                 break;
3006         case WLAN_CATEGORY_BACK:
3007                 switch (mgmt->u.action.u.addba_req.action_code) {
3008                 case WLAN_ACTION_ADDBA_REQ:
3009                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3010                                    sizeof(mgmt->u.action.u.addba_req)))
3011                                 break;
3012                         ieee80211_sta_process_addba_request(local, mgmt, len);
3013                         break;
3014                 case WLAN_ACTION_ADDBA_RESP:
3015                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3016                                    sizeof(mgmt->u.action.u.addba_resp)))
3017                                 break;
3018                         ieee80211_sta_process_addba_resp(local, mgmt, len);
3019                         break;
3020                 case WLAN_ACTION_DELBA:
3021                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3022                                    sizeof(mgmt->u.action.u.delba)))
3023                                 break;
3024                         ieee80211_sta_process_delba(sdata, mgmt, len);
3025                         break;
3026                 }
3027                 break;
3028         case PLINK_CATEGORY:
3029                 if (ieee80211_vif_is_mesh(&sdata->vif))
3030                         mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
3031                 break;
3032         case MESH_PATH_SEL_CATEGORY:
3033                 if (ieee80211_vif_is_mesh(&sdata->vif))
3034                         mesh_rx_path_sel_frame(sdata, mgmt, len);
3035                 break;
3036         }
3037 }
3038
3039 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3040                            struct ieee80211_rx_status *rx_status)
3041 {
3042         struct ieee80211_local *local = sdata->local;
3043         struct ieee80211_if_sta *ifsta;
3044         struct ieee80211_mgmt *mgmt;
3045         u16 fc;
3046
3047         if (skb->len < 24)
3048                 goto fail;
3049
3050         ifsta = &sdata->u.sta;
3051
3052         mgmt = (struct ieee80211_mgmt *) skb->data;
3053         fc = le16_to_cpu(mgmt->frame_control);
3054
3055         switch (fc & IEEE80211_FCTL_STYPE) {
3056         case IEEE80211_STYPE_PROBE_REQ:
3057         case IEEE80211_STYPE_PROBE_RESP:
3058         case IEEE80211_STYPE_BEACON:
3059         case IEEE80211_STYPE_ACTION:
3060                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3061         case IEEE80211_STYPE_AUTH:
3062         case IEEE80211_STYPE_ASSOC_RESP:
3063         case IEEE80211_STYPE_REASSOC_RESP:
3064         case IEEE80211_STYPE_DEAUTH:
3065         case IEEE80211_STYPE_DISASSOC:
3066                 skb_queue_tail(&ifsta->skb_queue, skb);
3067                 queue_work(local->hw.workqueue, &ifsta->work);
3068                 return;
3069         }
3070
3071  fail:
3072         kfree_skb(skb);
3073 }
3074
3075 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3076                                          struct sk_buff *skb)
3077 {
3078         struct ieee80211_rx_status *rx_status;
3079         struct ieee80211_if_sta *ifsta;
3080         struct ieee80211_mgmt *mgmt;
3081         u16 fc;
3082
3083         ifsta = &sdata->u.sta;
3084
3085         rx_status = (struct ieee80211_rx_status *) skb->cb;
3086         mgmt = (struct ieee80211_mgmt *) skb->data;
3087         fc = le16_to_cpu(mgmt->frame_control);
3088
3089         switch (fc & IEEE80211_FCTL_STYPE) {
3090         case IEEE80211_STYPE_PROBE_REQ:
3091                 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
3092                                             rx_status);
3093                 break;
3094         case IEEE80211_STYPE_PROBE_RESP:
3095                 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3096                 break;
3097         case IEEE80211_STYPE_BEACON:
3098                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3099                 break;
3100         case IEEE80211_STYPE_AUTH:
3101                 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
3102                 break;
3103         case IEEE80211_STYPE_ASSOC_RESP:
3104                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3105                 break;
3106         case IEEE80211_STYPE_REASSOC_RESP:
3107                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3108                 break;
3109         case IEEE80211_STYPE_DEAUTH:
3110                 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
3111                 break;
3112         case IEEE80211_STYPE_DISASSOC:
3113                 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
3114                 break;
3115         case IEEE80211_STYPE_ACTION:
3116                 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
3117                 break;
3118         }
3119
3120         kfree_skb(skb);
3121 }
3122
3123
3124 ieee80211_rx_result
3125 ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3126                       struct ieee80211_rx_status *rx_status)
3127 {
3128         struct ieee80211_mgmt *mgmt;
3129         __le16 fc;
3130
3131         if (skb->len < 2)
3132                 return RX_DROP_UNUSABLE;
3133
3134         mgmt = (struct ieee80211_mgmt *) skb->data;
3135         fc = mgmt->frame_control;
3136
3137         if (ieee80211_is_ctl(fc))
3138                 return RX_CONTINUE;
3139
3140         if (skb->len < 24)
3141                 return RX_DROP_MONITOR;
3142
3143         if (ieee80211_is_probe_resp(fc)) {
3144                 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3145                 dev_kfree_skb(skb);
3146                 return RX_QUEUED;
3147         }
3148
3149         if (ieee80211_is_beacon(fc)) {
3150                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3151                 dev_kfree_skb(skb);
3152                 return RX_QUEUED;
3153         }
3154
3155         return RX_CONTINUE;
3156 }
3157
3158
3159 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
3160 {
3161         struct ieee80211_local *local = sdata->local;
3162         int active = 0;
3163         struct sta_info *sta;
3164
3165         rcu_read_lock();
3166
3167         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3168                 if (sta->sdata == sdata &&
3169                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3170                                jiffies)) {
3171                         active++;
3172                         break;
3173                 }
3174         }
3175
3176         rcu_read_unlock();
3177
3178         return active;
3179 }
3180
3181
3182 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
3183 {
3184         struct ieee80211_local *local = sdata->local;
3185         struct sta_info *sta, *tmp;
3186         LIST_HEAD(tmp_list);
3187         DECLARE_MAC_BUF(mac);
3188         unsigned long flags;
3189
3190         spin_lock_irqsave(&local->sta_lock, flags);
3191         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3192                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3193 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3194                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3195                                sdata->dev->name, print_mac(mac, sta->addr));
3196 #endif
3197                         __sta_info_unlink(&sta);
3198                         if (sta)
3199                                 list_add(&sta->list, &tmp_list);
3200                 }
3201         spin_unlock_irqrestore(&local->sta_lock, flags);
3202
3203         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3204                 sta_info_destroy(sta);
3205 }
3206
3207
3208 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
3209                                      struct ieee80211_if_sta *ifsta)
3210 {
3211         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3212
3213         ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3214         if (ieee80211_sta_active_ibss(sdata))
3215                 return;
3216
3217         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3218                "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3219         ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
3220 }
3221
3222
3223 #ifdef CONFIG_MAC80211_MESH
3224 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
3225                            struct ieee80211_if_sta *ifsta)
3226 {
3227         bool free_plinks;
3228
3229         ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3230         mesh_path_expire(sdata);
3231
3232         free_plinks = mesh_plink_availables(sdata);
3233         if (free_plinks != sdata->u.sta.accepting_plinks)
3234                 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3235
3236         mod_timer(&ifsta->timer, jiffies +
3237                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3238 }
3239
3240
3241 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
3242 {
3243         struct ieee80211_if_sta *ifsta;
3244         ifsta = &sdata->u.sta;
3245         ifsta->state = IEEE80211_STA_MLME_MESH_UP;
3246         ieee80211_sta_timer((unsigned long)sdata);
3247         ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3248 }
3249 #endif
3250
3251
3252 void ieee80211_sta_timer(unsigned long data)
3253 {
3254         struct ieee80211_sub_if_data *sdata =
3255                 (struct ieee80211_sub_if_data *) data;
3256         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3257         struct ieee80211_local *local = sdata->local;
3258
3259         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3260         queue_work(local->hw.workqueue, &ifsta->work);
3261 }
3262
3263 void ieee80211_sta_work(struct work_struct *work)
3264 {
3265         struct ieee80211_sub_if_data *sdata =
3266                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3267         struct ieee80211_local *local = sdata->local;
3268         struct ieee80211_if_sta *ifsta;
3269         struct sk_buff *skb;
3270
3271         if (!netif_running(sdata->dev))
3272                 return;
3273
3274         if (local->sta_sw_scanning || local->sta_hw_scanning)
3275                 return;
3276
3277         if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3278                     sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3279                     sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3280                 return;
3281         ifsta = &sdata->u.sta;
3282
3283         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3284                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3285
3286 #ifdef CONFIG_MAC80211_MESH
3287         if (ifsta->preq_queue_len &&
3288             time_after(jiffies,
3289                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3290                 mesh_path_start_discovery(sdata);
3291 #endif
3292
3293         if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3294             ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3295             ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3296             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3297                 if (ifsta->scan_ssid_len)
3298                         ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3299                 else
3300                         ieee80211_sta_start_scan(sdata, NULL, 0);
3301                 return;
3302         }
3303
3304         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3305                 if (ieee80211_sta_config_auth(sdata, ifsta))
3306                         return;
3307                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3308         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3309                 return;
3310
3311         switch (ifsta->state) {
3312         case IEEE80211_STA_MLME_DISABLED:
3313                 break;
3314         case IEEE80211_STA_MLME_DIRECT_PROBE:
3315                 ieee80211_direct_probe(sdata, ifsta);
3316                 break;
3317         case IEEE80211_STA_MLME_AUTHENTICATE:
3318                 ieee80211_authenticate(sdata, ifsta);
3319                 break;
3320         case IEEE80211_STA_MLME_ASSOCIATE:
3321                 ieee80211_associate(sdata, ifsta);
3322                 break;
3323         case IEEE80211_STA_MLME_ASSOCIATED:
3324                 ieee80211_associated(sdata, ifsta);
3325                 break;
3326         case IEEE80211_STA_MLME_IBSS_SEARCH:
3327                 ieee80211_sta_find_ibss(sdata, ifsta);
3328                 break;
3329         case IEEE80211_STA_MLME_IBSS_JOINED:
3330                 ieee80211_sta_merge_ibss(sdata, ifsta);
3331                 break;
3332 #ifdef CONFIG_MAC80211_MESH
3333         case IEEE80211_STA_MLME_MESH_UP:
3334                 ieee80211_mesh_housekeeping(sdata, ifsta);
3335                 break;
3336 #endif
3337         default:
3338                 WARN_ON(1);
3339                 break;
3340         }
3341
3342         if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3343                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3344                        "mixed-cell disabled - disassociate\n", sdata->dev->name);
3345
3346                 ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED);
3347                 ieee80211_set_disassoc(sdata, ifsta, 0);
3348         }
3349 }
3350
3351
3352 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
3353                                      struct ieee80211_if_sta *ifsta)
3354 {
3355         struct ieee80211_local *local = sdata->local;
3356
3357         if (local->ops->reset_tsf) {
3358                 /* Reset own TSF to allow time synchronization work. */
3359                 local->ops->reset_tsf(local_to_hw(local));
3360         }
3361
3362         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3363
3364
3365         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3366                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3367         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3368                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3369         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3370                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3371         else
3372                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3373         ifsta->auth_transaction = -1;
3374         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3375         ifsta->assoc_scan_tries = 0;
3376         ifsta->direct_probe_tries = 0;
3377         ifsta->auth_tries = 0;
3378         ifsta->assoc_tries = 0;
3379         netif_carrier_off(sdata->dev);
3380 }
3381
3382
3383 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
3384                             struct ieee80211_if_sta *ifsta)
3385 {
3386         struct ieee80211_local *local = sdata->local;
3387
3388         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3389                 return;
3390
3391         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3392                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3393             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3394                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3395                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3396                 queue_work(local->hw.workqueue, &ifsta->work);
3397         }
3398 }
3399
3400 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3401                                     const char *ssid, int ssid_len)
3402 {
3403         int tmp, hidden_ssid;
3404
3405         if (ssid_len == ifsta->ssid_len &&
3406             !memcmp(ifsta->ssid, ssid, ssid_len))
3407                 return 1;
3408
3409         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3410                 return 0;
3411
3412         hidden_ssid = 1;
3413         tmp = ssid_len;
3414         while (tmp--) {
3415                 if (ssid[tmp] != '\0') {
3416                         hidden_ssid = 0;
3417                         break;
3418                 }
3419         }
3420
3421         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3422                 return 1;
3423
3424         if (ssid_len == 1 && ssid[0] == ' ')
3425                 return 1;
3426
3427         return 0;
3428 }
3429
3430 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
3431                                      struct ieee80211_if_sta *ifsta)
3432 {
3433         struct ieee80211_local *local = sdata->local;
3434         struct ieee80211_sta_bss *bss, *selected = NULL;
3435         int top_rssi = 0, freq;
3436
3437         spin_lock_bh(&local->sta_bss_lock);
3438         freq = local->oper_channel->center_freq;
3439         list_for_each_entry(bss, &local->sta_bss_list, list) {
3440                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3441                         continue;
3442
3443                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3444                         IEEE80211_STA_AUTO_BSSID_SEL |
3445                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3446                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3447                      !!sdata->default_key))
3448                         continue;
3449
3450                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3451                     bss->freq != freq)
3452                         continue;
3453
3454                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3455                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3456                         continue;
3457
3458                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3459                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3460                         continue;
3461
3462                 if (!selected || top_rssi < bss->signal) {
3463                         selected = bss;
3464                         top_rssi = bss->signal;
3465                 }
3466         }
3467         if (selected)
3468                 atomic_inc(&selected->users);
3469         spin_unlock_bh(&local->sta_bss_lock);
3470
3471         if (selected) {
3472                 ieee80211_set_freq(sdata, selected->freq);
3473                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3474                         ieee80211_sta_set_ssid(sdata, selected->ssid,
3475                                                selected->ssid_len);
3476                 ieee80211_sta_set_bssid(sdata, selected->bssid);
3477                 ieee80211_sta_def_wmm_params(sdata, selected, 0);
3478
3479                 /* Send out direct probe if no probe resp was received or
3480                  * the one we have is outdated
3481                  */
3482                 if (!selected->last_probe_resp ||
3483                     time_after(jiffies, selected->last_probe_resp
3484                                         + IEEE80211_SCAN_RESULT_EXPIRE))
3485                         ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3486                 else
3487                         ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3488
3489                 ieee80211_rx_bss_put(local, selected);
3490                 ieee80211_sta_reset_auth(sdata, ifsta);
3491                 return 0;
3492         } else {
3493                 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3494                         ifsta->assoc_scan_tries++;
3495                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3496                                 ieee80211_sta_start_scan(sdata, NULL, 0);
3497                         else
3498                                 ieee80211_sta_start_scan(sdata, ifsta->ssid,
3499                                                          ifsta->ssid_len);
3500                         ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3501                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3502                 } else
3503                         ifsta->state = IEEE80211_STA_MLME_DISABLED;
3504         }
3505         return -1;
3506 }
3507
3508
3509 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
3510                                      struct ieee80211_if_sta *ifsta)
3511 {
3512         struct ieee80211_local *local = sdata->local;
3513         struct ieee80211_sta_bss *bss;
3514         struct ieee80211_supported_band *sband;
3515         u8 bssid[ETH_ALEN], *pos;
3516         int i;
3517         int ret;
3518         DECLARE_MAC_BUF(mac);
3519
3520 #if 0
3521         /* Easier testing, use fixed BSSID. */
3522         memset(bssid, 0xfe, ETH_ALEN);
3523 #else
3524         /* Generate random, not broadcast, locally administered BSSID. Mix in
3525          * own MAC address to make sure that devices that do not have proper
3526          * random number generator get different BSSID. */
3527         get_random_bytes(bssid, ETH_ALEN);
3528         for (i = 0; i < ETH_ALEN; i++)
3529                 bssid[i] ^= sdata->dev->dev_addr[i];
3530         bssid[0] &= ~0x01;
3531         bssid[0] |= 0x02;
3532 #endif
3533
3534         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3535                sdata->dev->name, print_mac(mac, bssid));
3536
3537         bss = ieee80211_rx_bss_add(sdata, bssid,
3538                                    local->hw.conf.channel->center_freq,
3539                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3540         if (!bss)
3541                 return -ENOMEM;
3542
3543         bss->band = local->hw.conf.channel->band;
3544         sband = local->hw.wiphy->bands[bss->band];
3545
3546         if (local->hw.conf.beacon_int == 0)
3547                 local->hw.conf.beacon_int = 100;
3548         bss->beacon_int = local->hw.conf.beacon_int;
3549         bss->last_update = jiffies;
3550         bss->capability = WLAN_CAPABILITY_IBSS;
3551
3552         if (sdata->default_key)
3553                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3554         else
3555                 sdata->drop_unencrypted = 0;
3556
3557         bss->supp_rates_len = sband->n_bitrates;
3558         pos = bss->supp_rates;
3559         for (i = 0; i < sband->n_bitrates; i++) {
3560                 int rate = sband->bitrates[i].bitrate;
3561                 *pos++ = (u8) (rate / 5);
3562         }
3563
3564         ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3565         ieee80211_rx_bss_put(local, bss);
3566         return ret;
3567 }
3568
3569
3570 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
3571                                    struct ieee80211_if_sta *ifsta)
3572 {
3573         struct ieee80211_local *local = sdata->local;
3574         struct ieee80211_sta_bss *bss;
3575         int found = 0;
3576         u8 bssid[ETH_ALEN];
3577         int active_ibss;
3578         DECLARE_MAC_BUF(mac);
3579         DECLARE_MAC_BUF(mac2);
3580
3581         if (ifsta->ssid_len == 0)
3582                 return -EINVAL;
3583
3584         active_ibss = ieee80211_sta_active_ibss(sdata);
3585 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3586         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3587                sdata->dev->name, active_ibss);
3588 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3589         spin_lock_bh(&local->sta_bss_lock);
3590         list_for_each_entry(bss, &local->sta_bss_list, list) {
3591                 if (ifsta->ssid_len != bss->ssid_len ||
3592                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3593                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3594                         continue;
3595 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3596                 printk(KERN_DEBUG "   bssid=%s found\n",
3597                        print_mac(mac, bss->bssid));
3598 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3599                 memcpy(bssid, bss->bssid, ETH_ALEN);
3600                 found = 1;
3601                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3602                         break;
3603         }
3604         spin_unlock_bh(&local->sta_bss_lock);
3605
3606 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3607         if (found)
3608                 printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3609                        "%s\n", print_mac(mac, bssid),
3610                        print_mac(mac2, ifsta->bssid));
3611 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3612
3613         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3614                 int ret;
3615                 int search_freq;
3616
3617                 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3618                         search_freq = bss->freq;
3619                 else
3620                         search_freq = local->hw.conf.channel->center_freq;
3621
3622                 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
3623                                            ifsta->ssid, ifsta->ssid_len);
3624                 if (!bss)
3625                         goto dont_join;
3626
3627                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3628                        " based on configured SSID\n",
3629                        sdata->dev->name, print_mac(mac, bssid));
3630                 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3631                 ieee80211_rx_bss_put(local, bss);
3632                 return ret;
3633         }
3634
3635 dont_join:
3636 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3637         printk(KERN_DEBUG "   did not try to join ibss\n");
3638 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3639
3640         /* Selected IBSS not found in current scan results - try to scan */
3641         if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
3642             !ieee80211_sta_active_ibss(sdata)) {
3643                 mod_timer(&ifsta->timer, jiffies +
3644                                       IEEE80211_IBSS_MERGE_INTERVAL);
3645         } else if (time_after(jiffies, local->last_scan_completed +
3646                               IEEE80211_SCAN_INTERVAL)) {
3647                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3648                        "join\n", sdata->dev->name);
3649                 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
3650                                               ifsta->ssid_len);
3651         } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
3652                 int interval = IEEE80211_SCAN_INTERVAL;
3653
3654                 if (time_after(jiffies, ifsta->ibss_join_req +
3655                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3656                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3657                             (!(local->oper_channel->flags &
3658                                         IEEE80211_CHAN_NO_IBSS)))
3659                                 return ieee80211_sta_create_ibss(sdata, ifsta);
3660                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3661                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3662                                        " %d MHz\n", sdata->dev->name,
3663                                        local->hw.conf.channel->center_freq);
3664                         }
3665
3666                         /* No IBSS found - decrease scan interval and continue
3667                          * scanning. */
3668                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3669                 }
3670
3671                 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3672                 mod_timer(&ifsta->timer, jiffies + interval);
3673                 return 0;
3674         }
3675
3676         return 0;
3677 }
3678
3679
3680 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
3681 {
3682         struct ieee80211_if_sta *ifsta;
3683         int res;
3684
3685         if (len > IEEE80211_MAX_SSID_LEN)
3686                 return -EINVAL;
3687
3688         ifsta = &sdata->u.sta;
3689
3690         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3691                 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3692                 memcpy(ifsta->ssid, ssid, len);
3693                 ifsta->ssid_len = len;
3694                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3695
3696                 res = 0;
3697                 /*
3698                  * Hack! MLME code needs to be cleaned up to have different
3699                  * entry points for configuration and internal selection change
3700                  */
3701                 if (netif_running(sdata->dev))
3702                         res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3703                 if (res) {
3704                         printk(KERN_DEBUG "%s: Failed to config new SSID to "
3705                                "the low-level driver\n", sdata->dev->name);
3706                         return res;
3707                 }
3708         }
3709
3710         if (len)
3711                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3712         else
3713                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3714
3715         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3716             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3717                 ifsta->ibss_join_req = jiffies;
3718                 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3719                 return ieee80211_sta_find_ibss(sdata, ifsta);
3720         }
3721
3722         return 0;
3723 }
3724
3725
3726 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
3727 {
3728         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3729         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3730         *len = ifsta->ssid_len;
3731         return 0;
3732 }
3733
3734
3735 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
3736 {
3737         struct ieee80211_if_sta *ifsta;
3738         int res;
3739
3740         ifsta = &sdata->u.sta;
3741
3742         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3743                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3744                 res = 0;
3745                 /*
3746                  * Hack! See also ieee80211_sta_set_ssid.
3747                  */
3748                 if (netif_running(sdata->dev))
3749                         res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3750                 if (res) {
3751                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3752                                "the low-level driver\n", sdata->dev->name);
3753                         return res;
3754                 }
3755         }
3756
3757         if (is_valid_ether_addr(bssid))
3758                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3759         else
3760                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3761
3762         return 0;
3763 }
3764
3765
3766 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3767                                     struct ieee80211_sub_if_data *sdata,
3768                                     int powersave)
3769 {
3770         struct sk_buff *skb;
3771         struct ieee80211_hdr *nullfunc;
3772         __le16 fc;
3773
3774         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3775         if (!skb) {
3776                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3777                        "frame\n", sdata->dev->name);
3778                 return;
3779         }
3780         skb_reserve(skb, local->hw.extra_tx_headroom);
3781
3782         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3783         memset(nullfunc, 0, 24);
3784         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3785                          IEEE80211_FCTL_TODS);
3786         if (powersave)
3787                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3788         nullfunc->frame_control = fc;
3789         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3790         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3791         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3792
3793         ieee80211_sta_tx(sdata, skb, 0);
3794 }
3795
3796
3797 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3798 {
3799         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3800             ieee80211_vif_is_mesh(&sdata->vif))
3801                 ieee80211_sta_timer((unsigned long)sdata);
3802 }
3803
3804 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3805 {
3806         struct ieee80211_local *local = hw_to_local(hw);
3807         struct net_device *dev = local->scan_dev;
3808         struct ieee80211_sub_if_data *sdata;
3809         union iwreq_data wrqu;
3810
3811         local->last_scan_completed = jiffies;
3812         memset(&wrqu, 0, sizeof(wrqu));
3813         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3814
3815         if (local->sta_hw_scanning) {
3816                 local->sta_hw_scanning = 0;
3817                 if (ieee80211_hw_config(local))
3818                         printk(KERN_DEBUG "%s: failed to restore operational "
3819                                "channel after scan\n", dev->name);
3820                 /* Restart STA timer for HW scan case */
3821                 rcu_read_lock();
3822                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3823                         ieee80211_restart_sta_timer(sdata);
3824                 rcu_read_unlock();
3825
3826                 goto done;
3827         }
3828
3829         local->sta_sw_scanning = 0;
3830         if (ieee80211_hw_config(local))
3831                 printk(KERN_DEBUG "%s: failed to restore operational "
3832                        "channel after scan\n", dev->name);
3833
3834
3835         netif_tx_lock_bh(local->mdev);
3836         netif_addr_lock(local->mdev);
3837         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3838         local->ops->configure_filter(local_to_hw(local),
3839                                      FIF_BCN_PRBRESP_PROMISC,
3840                                      &local->filter_flags,
3841                                      local->mdev->mc_count,
3842                                      local->mdev->mc_list);
3843
3844         netif_addr_unlock(local->mdev);
3845         netif_tx_unlock_bh(local->mdev);
3846
3847         rcu_read_lock();
3848         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3849                 /* Tell AP we're back */
3850                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3851                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3852                         ieee80211_send_nullfunc(local, sdata, 0);
3853
3854                 ieee80211_restart_sta_timer(sdata);
3855
3856                 netif_wake_queue(sdata->dev);
3857         }
3858         rcu_read_unlock();
3859
3860 done:
3861         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3862         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3863                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3864                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3865                     (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3866                     !ieee80211_sta_active_ibss(sdata)))
3867                         ieee80211_sta_find_ibss(sdata, ifsta);
3868         }
3869 }
3870 EXPORT_SYMBOL(ieee80211_scan_completed);
3871
3872 void ieee80211_sta_scan_work(struct work_struct *work)
3873 {
3874         struct ieee80211_local *local =
3875                 container_of(work, struct ieee80211_local, scan_work.work);
3876         struct net_device *dev = local->scan_dev;
3877         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3878         struct ieee80211_supported_band *sband;
3879         struct ieee80211_channel *chan;
3880         int skip;
3881         unsigned long next_delay = 0;
3882
3883         if (!local->sta_sw_scanning)
3884                 return;
3885
3886         switch (local->scan_state) {
3887         case SCAN_SET_CHANNEL:
3888                 /*
3889                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3890                  * after we successfully scanned the last channel of the last
3891                  * band (and the last band is supported by the hw)
3892                  */
3893                 if (local->scan_band < IEEE80211_NUM_BANDS)
3894                         sband = local->hw.wiphy->bands[local->scan_band];
3895                 else
3896                         sband = NULL;
3897
3898                 /*
3899                  * If we are at an unsupported band and have more bands
3900                  * left to scan, advance to the next supported one.
3901                  */
3902                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3903                         local->scan_band++;
3904                         sband = local->hw.wiphy->bands[local->scan_band];
3905                         local->scan_channel_idx = 0;
3906                 }
3907
3908                 /* if no more bands/channels left, complete scan */
3909                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3910                         ieee80211_scan_completed(local_to_hw(local));
3911                         return;
3912                 }
3913                 skip = 0;
3914                 chan = &sband->channels[local->scan_channel_idx];
3915
3916                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3917                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3918                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3919                         skip = 1;
3920
3921                 if (!skip) {
3922                         local->scan_channel = chan;
3923                         if (ieee80211_hw_config(local)) {
3924                                 printk(KERN_DEBUG "%s: failed to set freq to "
3925                                        "%d MHz for scan\n", dev->name,
3926                                        chan->center_freq);
3927                                 skip = 1;
3928                         }
3929                 }
3930
3931                 /* advance state machine to next channel/band */
3932                 local->scan_channel_idx++;
3933                 if (local->scan_channel_idx >= sband->n_channels) {
3934                         /*
3935                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3936                          * we'll catch that case above and complete the scan
3937                          * if that is the case.
3938                          */
3939                         local->scan_band++;
3940                         local->scan_channel_idx = 0;
3941                 }
3942
3943                 if (skip)
3944                         break;
3945
3946                 next_delay = IEEE80211_PROBE_DELAY +
3947                              usecs_to_jiffies(local->hw.channel_change_time);
3948                 local->scan_state = SCAN_SEND_PROBE;
3949                 break;
3950         case SCAN_SEND_PROBE:
3951                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3952                 local->scan_state = SCAN_SET_CHANNEL;
3953
3954                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3955                         break;
3956                 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
3957                                          local->scan_ssid_len);
3958                 next_delay = IEEE80211_CHANNEL_TIME;
3959                 break;
3960         }
3961
3962         if (local->sta_sw_scanning)
3963                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3964                                    next_delay);
3965 }
3966
3967
3968 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
3969                                     u8 *ssid, size_t ssid_len)
3970 {
3971         struct ieee80211_local *local = scan_sdata->local;
3972         struct ieee80211_sub_if_data *sdata;
3973
3974         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3975                 return -EINVAL;
3976
3977         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3978          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3979          * BSSID: MACAddress
3980          * SSID
3981          * ScanType: ACTIVE, PASSIVE
3982          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3983          *    a Probe frame during active scanning
3984          * ChannelList
3985          * MinChannelTime (>= ProbeDelay), in TU
3986          * MaxChannelTime: (>= MinChannelTime), in TU
3987          */
3988
3989          /* MLME-SCAN.confirm
3990           * BSSDescriptionSet
3991           * ResultCode: SUCCESS, INVALID_PARAMETERS
3992          */
3993
3994         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3995                 if (local->scan_dev == scan_sdata->dev)
3996                         return 0;
3997                 return -EBUSY;
3998         }
3999
4000         if (local->ops->hw_scan) {
4001                 int rc = local->ops->hw_scan(local_to_hw(local),
4002                                              ssid, ssid_len);
4003                 if (!rc) {
4004                         local->sta_hw_scanning = 1;
4005                         local->scan_dev = scan_sdata->dev;
4006                 }
4007                 return rc;
4008         }
4009
4010         local->sta_sw_scanning = 1;
4011
4012         rcu_read_lock();
4013         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4014                 netif_stop_queue(sdata->dev);
4015                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4016                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4017                         ieee80211_send_nullfunc(local, sdata, 1);
4018         }
4019         rcu_read_unlock();
4020
4021         if (ssid) {
4022                 local->scan_ssid_len = ssid_len;
4023                 memcpy(local->scan_ssid, ssid, ssid_len);
4024         } else
4025                 local->scan_ssid_len = 0;
4026         local->scan_state = SCAN_SET_CHANNEL;
4027         local->scan_channel_idx = 0;
4028         local->scan_band = IEEE80211_BAND_2GHZ;
4029         local->scan_dev = scan_sdata->dev;
4030
4031         netif_addr_lock_bh(local->mdev);
4032         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4033         local->ops->configure_filter(local_to_hw(local),
4034                                      FIF_BCN_PRBRESP_PROMISC,
4035                                      &local->filter_flags,
4036                                      local->mdev->mc_count,
4037                                      local->mdev->mc_list);
4038         netif_addr_unlock_bh(local->mdev);
4039
4040         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4041         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4042                            IEEE80211_CHANNEL_TIME);
4043
4044         return 0;
4045 }
4046
4047
4048 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
4049 {
4050         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4051         struct ieee80211_local *local = sdata->local;
4052
4053         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4054                 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
4055
4056         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4057                 if (local->scan_dev == sdata->dev)
4058                         return 0;
4059                 return -EBUSY;
4060         }
4061
4062         ifsta->scan_ssid_len = ssid_len;
4063         if (ssid_len)
4064                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4065         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4066         queue_work(local->hw.workqueue, &ifsta->work);
4067         return 0;
4068 }
4069
4070
4071 static void ieee80211_sta_add_scan_ies(struct iw_request_info *info,
4072                                        struct ieee80211_sta_bss *bss,
4073                                        char **current_ev, char *end_buf)
4074 {
4075         u8 *pos, *end, *next;
4076         struct iw_event iwe;
4077
4078         if (bss == NULL || bss->ies == NULL)
4079                 return;
4080
4081         /*
4082          * If needed, fragment the IEs buffer (at IE boundaries) into short
4083          * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
4084          */
4085         pos = bss->ies;
4086         end = pos + bss->ies_len;
4087
4088         while (end - pos > IW_GENERIC_IE_MAX) {
4089                 next = pos + 2 + pos[1];
4090                 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
4091                         next = next + 2 + next[1];
4092
4093                 memset(&iwe, 0, sizeof(iwe));
4094                 iwe.cmd = IWEVGENIE;
4095                 iwe.u.data.length = next - pos;
4096                 *current_ev = iwe_stream_add_point(info, *current_ev,
4097                                                    end_buf, &iwe, pos);
4098
4099                 pos = next;
4100         }
4101
4102         if (end > pos) {
4103                 memset(&iwe, 0, sizeof(iwe));
4104                 iwe.cmd = IWEVGENIE;
4105                 iwe.u.data.length = end - pos;
4106                 *current_ev = iwe_stream_add_point(info, *current_ev,
4107                                                    end_buf, &iwe, pos);
4108         }
4109 }
4110
4111
4112 static char *
4113 ieee80211_sta_scan_result(struct ieee80211_local *local,
4114                           struct iw_request_info *info,
4115                           struct ieee80211_sta_bss *bss,
4116                           char *current_ev, char *end_buf)
4117 {
4118         struct iw_event iwe;
4119
4120         if (time_after(jiffies,
4121                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4122                 return current_ev;
4123
4124         memset(&iwe, 0, sizeof(iwe));
4125         iwe.cmd = SIOCGIWAP;
4126         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4127         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4128         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4129                                           IW_EV_ADDR_LEN);
4130
4131         memset(&iwe, 0, sizeof(iwe));
4132         iwe.cmd = SIOCGIWESSID;
4133         if (bss_mesh_cfg(bss)) {
4134                 iwe.u.data.length = bss_mesh_id_len(bss);
4135                 iwe.u.data.flags = 1;
4136                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4137                                                   &iwe, bss_mesh_id(bss));
4138         } else {
4139                 iwe.u.data.length = bss->ssid_len;
4140                 iwe.u.data.flags = 1;
4141                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4142                                                   &iwe, bss->ssid);
4143         }
4144
4145         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4146             || bss_mesh_cfg(bss)) {
4147                 memset(&iwe, 0, sizeof(iwe));
4148                 iwe.cmd = SIOCGIWMODE;
4149                 if (bss_mesh_cfg(bss))
4150                         iwe.u.mode = IW_MODE_MESH;
4151                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4152                         iwe.u.mode = IW_MODE_MASTER;
4153                 else
4154                         iwe.u.mode = IW_MODE_ADHOC;
4155                 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4156                                                   &iwe, IW_EV_UINT_LEN);
4157         }
4158
4159         memset(&iwe, 0, sizeof(iwe));
4160         iwe.cmd = SIOCGIWFREQ;
4161         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4162         iwe.u.freq.e = 0;
4163         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4164                                           IW_EV_FREQ_LEN);
4165
4166         memset(&iwe, 0, sizeof(iwe));
4167         iwe.cmd = SIOCGIWFREQ;
4168         iwe.u.freq.m = bss->freq;
4169         iwe.u.freq.e = 6;
4170         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4171                                           IW_EV_FREQ_LEN);
4172         memset(&iwe, 0, sizeof(iwe));
4173         iwe.cmd = IWEVQUAL;
4174         iwe.u.qual.qual = bss->qual;
4175         iwe.u.qual.level = bss->signal;
4176         iwe.u.qual.noise = bss->noise;
4177         iwe.u.qual.updated = local->wstats_flags;
4178         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4179                                           IW_EV_QUAL_LEN);
4180
4181         memset(&iwe, 0, sizeof(iwe));
4182         iwe.cmd = SIOCGIWENCODE;
4183         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4184                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4185         else
4186                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4187         iwe.u.data.length = 0;
4188         current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4189                                           &iwe, "");
4190
4191         ieee80211_sta_add_scan_ies(info, bss, &current_ev, end_buf);
4192
4193         if (bss && bss->supp_rates_len > 0) {
4194                 /* display all supported rates in readable format */
4195                 char *p = current_ev + iwe_stream_lcp_len(info);
4196                 int i;
4197
4198                 memset(&iwe, 0, sizeof(iwe));
4199                 iwe.cmd = SIOCGIWRATE;
4200                 /* Those two flags are ignored... */
4201                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4202
4203                 for (i = 0; i < bss->supp_rates_len; i++) {
4204                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4205                                                         0x7f) * 500000);
4206                         p = iwe_stream_add_value(info, current_ev, p,
4207                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4208                 }
4209                 current_ev = p;
4210         }
4211
4212         if (bss) {
4213                 char *buf;
4214                 buf = kmalloc(30, GFP_ATOMIC);
4215                 if (buf) {
4216                         memset(&iwe, 0, sizeof(iwe));
4217                         iwe.cmd = IWEVCUSTOM;
4218                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4219                         iwe.u.data.length = strlen(buf);
4220                         current_ev = iwe_stream_add_point(info, current_ev,
4221                                                           end_buf,
4222                                                           &iwe, buf);
4223                         memset(&iwe, 0, sizeof(iwe));
4224                         iwe.cmd = IWEVCUSTOM;
4225                         sprintf(buf, " Last beacon: %dms ago",
4226                                 jiffies_to_msecs(jiffies - bss->last_update));
4227                         iwe.u.data.length = strlen(buf);
4228                         current_ev = iwe_stream_add_point(info, current_ev,
4229                                                           end_buf, &iwe, buf);
4230                         kfree(buf);
4231                 }
4232         }
4233
4234         if (bss_mesh_cfg(bss)) {
4235                 char *buf;
4236                 u8 *cfg = bss_mesh_cfg(bss);
4237                 buf = kmalloc(50, GFP_ATOMIC);
4238                 if (buf) {
4239                         memset(&iwe, 0, sizeof(iwe));
4240                         iwe.cmd = IWEVCUSTOM;
4241                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4242                         iwe.u.data.length = strlen(buf);
4243                         current_ev = iwe_stream_add_point(info, current_ev,
4244                                                           end_buf,
4245                                                           &iwe, buf);
4246                         sprintf(buf, "Path Selection Protocol ID: "
4247                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4248                                                         cfg[4]);
4249                         iwe.u.data.length = strlen(buf);
4250                         current_ev = iwe_stream_add_point(info, current_ev,
4251                                                           end_buf,
4252                                                           &iwe, buf);
4253                         sprintf(buf, "Path Selection Metric ID: "
4254                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4255                                                         cfg[8]);
4256                         iwe.u.data.length = strlen(buf);
4257                         current_ev = iwe_stream_add_point(info, current_ev,
4258                                                           end_buf,
4259                                                           &iwe, buf);
4260                         sprintf(buf, "Congestion Control Mode ID: "
4261                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4262                                                         cfg[11], cfg[12]);
4263                         iwe.u.data.length = strlen(buf);
4264                         current_ev = iwe_stream_add_point(info, current_ev,
4265                                                           end_buf,
4266                                                           &iwe, buf);
4267                         sprintf(buf, "Channel Precedence: "
4268                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4269                                                         cfg[15], cfg[16]);
4270                         iwe.u.data.length = strlen(buf);
4271                         current_ev = iwe_stream_add_point(info, current_ev,
4272                                                           end_buf,
4273                                                           &iwe, buf);
4274                         kfree(buf);
4275                 }
4276         }
4277
4278         return current_ev;
4279 }
4280
4281
4282 int ieee80211_sta_scan_results(struct ieee80211_local *local,
4283                                struct iw_request_info *info,
4284                                char *buf, size_t len)
4285 {
4286         char *current_ev = buf;
4287         char *end_buf = buf + len;
4288         struct ieee80211_sta_bss *bss;
4289
4290         spin_lock_bh(&local->sta_bss_lock);
4291         list_for_each_entry(bss, &local->sta_bss_list, list) {
4292                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4293                         spin_unlock_bh(&local->sta_bss_lock);
4294                         return -E2BIG;
4295                 }
4296                 current_ev = ieee80211_sta_scan_result(local, info, bss,
4297                                                        current_ev, end_buf);
4298         }
4299         spin_unlock_bh(&local->sta_bss_lock);
4300         return current_ev - buf;
4301 }
4302
4303
4304 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
4305 {
4306         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4307
4308         kfree(ifsta->extra_ie);
4309         if (len == 0) {
4310                 ifsta->extra_ie = NULL;
4311                 ifsta->extra_ie_len = 0;
4312                 return 0;
4313         }
4314         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4315         if (!ifsta->extra_ie) {
4316                 ifsta->extra_ie_len = 0;
4317                 return -ENOMEM;
4318         }
4319         memcpy(ifsta->extra_ie, ie, len);
4320         ifsta->extra_ie_len = len;
4321         return 0;
4322 }
4323
4324
4325 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
4326                                         struct sk_buff *skb, u8 *bssid,
4327                                         u8 *addr, u64 supp_rates)
4328 {
4329         struct ieee80211_local *local = sdata->local;
4330         struct sta_info *sta;
4331         DECLARE_MAC_BUF(mac);
4332         int band = local->hw.conf.channel->band;
4333
4334         /* TODO: Could consider removing the least recently used entry and
4335          * allow new one to be added. */
4336         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4337                 if (net_ratelimit()) {
4338                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4339                                "entry %s\n", sdata->dev->name, print_mac(mac, addr));
4340                 }
4341                 return NULL;
4342         }
4343
4344         if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4345                 return NULL;
4346
4347 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4348         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4349                wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
4350 #endif
4351
4352         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4353         if (!sta)
4354                 return NULL;
4355
4356         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4357
4358         /* make sure mandatory rates are always added */
4359         sta->supp_rates[band] = supp_rates |
4360                         ieee80211_sta_get_mandatory_rates(local, band);
4361
4362         rate_control_rate_init(sta, local);
4363
4364         if (sta_info_insert(sta))
4365                 return NULL;
4366
4367         return sta;
4368 }
4369
4370
4371 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
4372 {
4373         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4374
4375         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4376                sdata->dev->name, reason);
4377
4378         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4379             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4380                 return -EINVAL;
4381
4382         ieee80211_send_deauth(sdata, ifsta, reason);
4383         ieee80211_set_disassoc(sdata, ifsta, 1);
4384         return 0;
4385 }
4386
4387
4388 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
4389 {
4390         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4391
4392         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4393                sdata->dev->name, reason);
4394
4395         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4396                 return -EINVAL;
4397
4398         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4399                 return -1;
4400
4401         ieee80211_send_disassoc(sdata, ifsta, reason);
4402         ieee80211_set_disassoc(sdata, ifsta, 0);
4403         return 0;
4404 }
4405
4406 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4407                           enum ieee80211_notification_types  notif_type)
4408 {
4409         struct ieee80211_local *local = hw_to_local(hw);
4410         struct ieee80211_sub_if_data *sdata;
4411
4412         switch (notif_type) {
4413         case IEEE80211_NOTIFY_RE_ASSOC:
4414                 rcu_read_lock();
4415                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4416                         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4417                                 continue;
4418
4419                         ieee80211_sta_req_auth(sdata, &sdata->u.sta);
4420                 }
4421                 rcu_read_unlock();
4422                 break;
4423         }
4424 }
4425 EXPORT_SYMBOL(ieee80211_notify_mac);