err.no 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_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 /* mgmt header + 1 byte action code */
  63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  64
  65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  70
  71 /* next values represent the buffer size for A-MPDU frame.
  72  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  73 #define IEEE80211_MIN_AMPDU_BUF 0x8
  74 #define IEEE80211_MAX_AMPDU_BUF 0x40
  75
  76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  77                                      u8 *ssid, size_t ssid_len);
  78 static struct ieee80211_sta_bss *
  79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  80                      u8 *ssid, u8 ssid_len);
  81 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
  82                                  struct ieee80211_sta_bss *bss);
  83 static int ieee80211_sta_find_ibss(struct net_device *dev,
  84                                    struct ieee80211_if_sta *ifsta);
  85 static int ieee80211_sta_wep_configured(struct net_device *dev);
  86 static int ieee80211_sta_start_scan(struct net_device *dev,
  87                                     u8 *ssid, size_t ssid_len);
  88 static int ieee80211_sta_config_auth(struct net_device *dev,
  89                                      struct ieee80211_if_sta *ifsta);
  90 static void sta_rx_agg_session_timer_expired(unsigned long data);
  91
  92
  93 void ieee802_11_parse_elems(u8 *start, size_t len,
  94                             struct ieee802_11_elems *elems)
  95 {
  96         size_t left = len;
  97         u8 *pos = start;
  98
  99         memset(elems, 0, sizeof(*elems));
 100
 101         while (left >= 2) {
 102                 u8 id, elen;
 103
 104                 id = *pos++;
 105                 elen = *pos++;
 106                 left -= 2;
 107
 108                 if (elen > left)
 109                         return;
 110
 111                 switch (id) {
 112                 case WLAN_EID_SSID:
 113                         elems->ssid = pos;
 114                         elems->ssid_len = elen;
 115                         break;
 116                 case WLAN_EID_SUPP_RATES:
 117                         elems->supp_rates = pos;
 118                         elems->supp_rates_len = elen;
 119                         break;
 120                 case WLAN_EID_FH_PARAMS:
 121                         elems->fh_params = pos;
 122                         elems->fh_params_len = elen;
 123                         break;
 124                 case WLAN_EID_DS_PARAMS:
 125                         elems->ds_params = pos;
 126                         elems->ds_params_len = elen;
 127                         break;
 128                 case WLAN_EID_CF_PARAMS:
 129                         elems->cf_params = pos;
 130                         elems->cf_params_len = elen;
 131                         break;
 132                 case WLAN_EID_TIM:
 133                         elems->tim = pos;
 134                         elems->tim_len = elen;
 135                         break;
 136                 case WLAN_EID_IBSS_PARAMS:
 137                         elems->ibss_params = pos;
 138                         elems->ibss_params_len = elen;
 139                         break;
 140                 case WLAN_EID_CHALLENGE:
 141                         elems->challenge = pos;
 142                         elems->challenge_len = elen;
 143                         break;
 144                 case WLAN_EID_WPA:
 145                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 146                             pos[2] == 0xf2) {
 147                                 /* Microsoft OUI (00:50:F2) */
 148                                 if (pos[3] == 1) {
 149                                         /* OUI Type 1 - WPA IE */
 150                                         elems->wpa = pos;
 151                                         elems->wpa_len = elen;
 152                                 } else if (elen >= 5 && pos[3] == 2) {
 153                                         if (pos[4] == 0) {
 154                                                 elems->wmm_info = pos;
 155                                                 elems->wmm_info_len = elen;
 156                                         } else if (pos[4] == 1) {
 157                                                 elems->wmm_param = pos;
 158                                                 elems->wmm_param_len = elen;
 159                                         }
 160                                 }
 161                         }
 162                         break;
 163                 case WLAN_EID_RSN:
 164                         elems->rsn = pos;
 165                         elems->rsn_len = elen;
 166                         break;
 167                 case WLAN_EID_ERP_INFO:
 168                         elems->erp_info = pos;
 169                         elems->erp_info_len = elen;
 170                         break;
 171                 case WLAN_EID_EXT_SUPP_RATES:
 172                         elems->ext_supp_rates = pos;
 173                         elems->ext_supp_rates_len = elen;
 174                         break;
 175                 case WLAN_EID_HT_CAPABILITY:
 176                         elems->ht_cap_elem = pos;
 177                         elems->ht_cap_elem_len = elen;
 178                         break;
 179                 case WLAN_EID_HT_EXTRA_INFO:
 180                         elems->ht_info_elem = pos;
 181                         elems->ht_info_elem_len = elen;
 182                         break;
 183                 case WLAN_EID_MESH_ID:
 184                         elems->mesh_id = pos;
 185                         elems->mesh_id_len = elen;
 186                         break;
 187                 case WLAN_EID_MESH_CONFIG:
 188                         elems->mesh_config = pos;
 189                         elems->mesh_config_len = elen;
 190                         break;
 191                 case WLAN_EID_PEER_LINK:
 192                         elems->peer_link = pos;
 193                         elems->peer_link_len = elen;
 194                         break;
 195                 case WLAN_EID_PREQ:
 196                         elems->preq = pos;
 197                         elems->preq_len = elen;
 198                         break;
 199                 case WLAN_EID_PREP:
 200                         elems->prep = pos;
 201                         elems->prep_len = elen;
 202                         break;
 203                 case WLAN_EID_PERR:
 204                         elems->perr = pos;
 205                         elems->perr_len = elen;
 206                         break;
 207                 case WLAN_EID_CHANNEL_SWITCH:
 208                         elems->ch_switch_elem = pos;
 209                         elems->ch_switch_elem_len = elen;
 210                         break;
 211                 case WLAN_EID_QUIET:
 212                         if (!elems->quiet_elem) {
 213                                 elems->quiet_elem = pos;
 214                                 elems->quiet_elem_len = elen;
 215                         }
 216                         elems->num_of_quiet_elem++;
 217                         break;
 218                 case WLAN_EID_COUNTRY:
 219                         elems->country_elem = pos;
 220                         elems->country_elem_len = elen;
 221                         break;
 222                 case WLAN_EID_PWR_CONSTRAINT:
 223                         elems->pwr_constr_elem = pos;
 224                         elems->pwr_constr_elem_len = elen;
 225                         break;
 226                 default:
 227                         break;
 228                 }
 229
 230                 left -= elen;
 231                 pos += elen;
 232         }
 233 }
 234
 235
 236 static int ecw2cw(int ecw)
 237 {
 238         return (1 << ecw) - 1;
 239 }
 240
 241
 242 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 243                                          struct ieee80211_sta_bss *bss,
 244                                          int ibss)
 245 {
 246         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 247         struct ieee80211_local *local = sdata->local;
 248         int i, have_higher_than_11mbit = 0;
 249
 250
 251         /* cf. IEEE 802.11 9.2.12 */
 252         for (i = 0; i < bss->supp_rates_len; i++)
 253                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 254                         have_higher_than_11mbit = 1;
 255
 256         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 257             have_higher_than_11mbit)
 258                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 259         else
 260                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 261
 262
 263         if (local->ops->conf_tx) {
 264                 struct ieee80211_tx_queue_params qparam;
 265
 266                 memset(&qparam, 0, sizeof(qparam));
 267
 268                 qparam.aifs = 2;
 269
 270                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 271                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 272                         qparam.cw_min = 31;
 273                 else
 274                         qparam.cw_min = 15;
 275
 276                 qparam.cw_max = 1023;
 277                 qparam.txop = 0;
 278
 279                 for (i = 0; i < local_to_hw(local)->queues; i++)
 280                         local->ops->conf_tx(local_to_hw(local), i, &qparam);
 281         }
 282 }
 283
 284 static void ieee80211_sta_wmm_params(struct net_device *dev,
 285                                      struct ieee80211_if_sta *ifsta,
 286                                      u8 *wmm_param, size_t wmm_param_len)
 287 {
 288         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 289         struct ieee80211_tx_queue_params params;
 290         size_t left;
 291         int count;
 292         u8 *pos;
 293
 294         if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
 295                 return;
 296
 297         if (!wmm_param)
 298                 return;
 299
 300         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 301                 return;
 302         count = wmm_param[6] & 0x0f;
 303         if (count == ifsta->wmm_last_param_set)
 304                 return;
 305         ifsta->wmm_last_param_set = count;
 306
 307         pos = wmm_param + 8;
 308         left = wmm_param_len - 8;
 309
 310         memset(&params, 0, sizeof(params));
 311
 312         if (!local->ops->conf_tx)
 313                 return;
 314
 315         local->wmm_acm = 0;
 316         for (; left >= 4; left -= 4, pos += 4) {
 317                 int aci = (pos[0] >> 5) & 0x03;
 318                 int acm = (pos[0] >> 4) & 0x01;
 319                 int queue;
 320
 321                 switch (aci) {
 322                 case 1:
 323                         queue = 3;
 324                         if (acm)
 325                                 local->wmm_acm |= BIT(0) | BIT(3);
 326                         break;
 327                 case 2:
 328                         queue = 1;
 329                         if (acm)
 330                                 local->wmm_acm |= BIT(4) | BIT(5);
 331                         break;
 332                 case 3:
 333                         queue = 0;
 334                         if (acm)
 335                                 local->wmm_acm |= BIT(6) | BIT(7);
 336                         break;
 337                 case 0:
 338                 default:
 339                         queue = 2;
 340                         if (acm)
 341                                 local->wmm_acm |= BIT(1) | BIT(2);
 342                         break;
 343                 }
 344
 345                 params.aifs = pos[0] & 0x0f;
 346                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 347                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 348                 params.txop = get_unaligned_le16(pos + 2);
 349 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 350                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 351                        "cWmin=%d cWmax=%d txop=%d\n",
 352                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 353                        params.cw_max, params.txop);
 354 #endif
 355                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 356                  * AC for now) */
 357                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 358                         printk(KERN_DEBUG "%s: failed to set TX queue "
 359                                "parameters for queue %d\n", dev->name, queue);
 360                 }
 361         }
 362 }
 363
 364 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 365                                            bool use_protection,
 366                                            bool use_short_preamble)
 367 {
 368         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 369 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 370         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 371         DECLARE_MAC_BUF(mac);
 372 #endif
 373         u32 changed = 0;
 374
 375         if (use_protection != bss_conf->use_cts_prot) {
 376 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 377                 if (net_ratelimit()) {
 378                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 379                                "%s)\n",
 380                                sdata->dev->name,
 381                                use_protection ? "enabled" : "disabled",
 382                                print_mac(mac, ifsta->bssid));
 383                 }
 384 #endif
 385                 bss_conf->use_cts_prot = use_protection;
 386                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 387         }
 388
 389         if (use_short_preamble != bss_conf->use_short_preamble) {
 390 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 391                 if (net_ratelimit()) {
 392                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 393                                " (BSSID=%s)\n",
 394                                sdata->dev->name,
 395                                use_short_preamble ? "short" : "long",
 396                                print_mac(mac, ifsta->bssid));
 397                 }
 398 #endif
 399                 bss_conf->use_short_preamble = use_short_preamble;
 400                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 401         }
 402
 403         return changed;
 404 }
 405
 406 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 407                                    u8 erp_value)
 408 {
 409         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 410         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 411
 412         return ieee80211_handle_protect_preamb(sdata,
 413                         use_protection, use_short_preamble);
 414 }
 415
 416 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 417                                            struct ieee80211_sta_bss *bss)
 418 {
 419         u32 changed = 0;
 420
 421         if (bss->has_erp_value)
 422                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 423         else {
 424                 u16 capab = bss->capability;
 425                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 426                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 427         }
 428
 429         return changed;
 430 }
 431
 432 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 433                                    struct ieee80211_ht_info *ht_info)
 434 {
 435
 436         if (ht_info == NULL)
 437                 return -EINVAL;
 438
 439         memset(ht_info, 0, sizeof(*ht_info));
 440
 441         if (ht_cap_ie) {
 442                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 443
 444                 ht_info->ht_supported = 1;
 445                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 446                 ht_info->ampdu_factor =
 447                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 448                 ht_info->ampdu_density =
 449                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 450                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 451         } else
 452                 ht_info->ht_supported = 0;
 453
 454         return 0;
 455 }
 456
 457 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 458                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 459                         struct ieee80211_ht_bss_info *bss_info)
 460 {
 461         if (bss_info == NULL)
 462                 return -EINVAL;
 463
 464         memset(bss_info, 0, sizeof(*bss_info));
 465
 466         if (ht_add_info_ie) {
 467                 u16 op_mode;
 468                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 469
 470                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 471                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 472                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 473         }
 474
 475         return 0;
 476 }
 477
 478 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 479                                          struct ieee80211_if_sta *ifsta)
 480 {
 481         char *buf;
 482         size_t len;
 483         int i;
 484         union iwreq_data wrqu;
 485
 486         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 487                 return;
 488
 489         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 490                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 491         if (!buf)
 492                 return;
 493
 494         len = sprintf(buf, "ASSOCINFO(");
 495         if (ifsta->assocreq_ies) {
 496                 len += sprintf(buf + len, "ReqIEs=");
 497                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 498                         len += sprintf(buf + len, "%02x",
 499                                        ifsta->assocreq_ies[i]);
 500                 }
 501         }
 502         if (ifsta->assocresp_ies) {
 503                 if (ifsta->assocreq_ies)
 504                         len += sprintf(buf + len, " ");
 505                 len += sprintf(buf + len, "RespIEs=");
 506                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 507                         len += sprintf(buf + len, "%02x",
 508                                        ifsta->assocresp_ies[i]);
 509                 }
 510         }
 511         len += sprintf(buf + len, ")");
 512
 513         if (len > IW_CUSTOM_MAX) {
 514                 len = sprintf(buf, "ASSOCRESPIE=");
 515                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 516                         len += sprintf(buf + len, "%02x",
 517                                        ifsta->assocresp_ies[i]);
 518                 }
 519         }
 520
 521         memset(&wrqu, 0, sizeof(wrqu));
 522         wrqu.data.length = len;
 523         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 524
 525         kfree(buf);
 526 }
 527
 528
 529 static void ieee80211_set_associated(struct net_device *dev,
 530                                      struct ieee80211_if_sta *ifsta,
 531                                      bool assoc)
 532 {
 533         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 534         struct ieee80211_local *local = sdata->local;
 535         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 536         union iwreq_data wrqu;
 537         u32 changed = BSS_CHANGED_ASSOC;
 538
 539         if (assoc) {
 540                 struct ieee80211_sta_bss *bss;
 541
 542                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 543
 544                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 545                         return;
 546
 547                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 548                                            conf->channel->center_freq,
 549                                            ifsta->ssid, ifsta->ssid_len);
 550                 if (bss) {
 551                         /* set timing information */
 552                         sdata->bss_conf.beacon_int = bss->beacon_int;
 553                         sdata->bss_conf.timestamp = bss->timestamp;
 554                         sdata->bss_conf.dtim_period = bss->dtim_period;
 555
 556                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 557
 558                         ieee80211_rx_bss_put(local, bss);
 559                 }
 560
 561                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 562                         changed |= BSS_CHANGED_HT;
 563                         sdata->bss_conf.assoc_ht = 1;
 564                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 565                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 566                 }
 567
 568                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 569                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 570                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 571                 ieee80211_sta_send_associnfo(dev, ifsta);
 572         } else {
 573                 netif_carrier_off(dev);
 574                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 575                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 576                 changed |= ieee80211_reset_erp_info(dev);
 577
 578                 sdata->bss_conf.assoc_ht = 0;
 579                 sdata->bss_conf.ht_conf = NULL;
 580                 sdata->bss_conf.ht_bss_conf = NULL;
 581
 582                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 583         }
 584         ifsta->last_probe = jiffies;
 585         ieee80211_led_assoc(local, assoc);
 586
 587         sdata->bss_conf.assoc = assoc;
 588         ieee80211_bss_info_change_notify(sdata, changed);
 589
 590         if (assoc)
 591                 netif_carrier_on(dev);
 592
 593         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 594         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 595 }
 596
 597 static void ieee80211_set_disassoc(struct net_device *dev,
 598                                    struct ieee80211_if_sta *ifsta, int deauth)
 599 {
 600         if (deauth)
 601                 ifsta->auth_tries = 0;
 602         ifsta->assoc_tries = 0;
 603         ieee80211_set_associated(dev, ifsta, 0);
 604 }
 605
 606 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 607                       int encrypt)
 608 {
 609         struct ieee80211_sub_if_data *sdata;
 610
 611         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 612         skb->dev = sdata->local->mdev;
 613         skb_set_mac_header(skb, 0);
 614         skb_set_network_header(skb, 0);
 615         skb_set_transport_header(skb, 0);
 616
 617         skb->iif = sdata->dev->ifindex;
 618         skb->do_not_encrypt = !encrypt;
 619
 620         dev_queue_xmit(skb);
 621 }
 622
 623
 624 static void ieee80211_send_auth(struct net_device *dev,
 625                                 struct ieee80211_if_sta *ifsta,
 626                                 int transaction, u8 *extra, size_t extra_len,
 627                                 int encrypt)
 628 {
 629         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 630         struct sk_buff *skb;
 631         struct ieee80211_mgmt *mgmt;
 632
 633         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 634                             sizeof(*mgmt) + 6 + extra_len);
 635         if (!skb) {
 636                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 637                        "frame\n", dev->name);
 638                 return;
 639         }
 640         skb_reserve(skb, local->hw.extra_tx_headroom);
 641
 642         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 643         memset(mgmt, 0, 24 + 6);
 644         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 645                                            IEEE80211_STYPE_AUTH);
 646         if (encrypt)
 647                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 648         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 649         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 650         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 651         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 652         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 653         ifsta->auth_transaction = transaction + 1;
 654         mgmt->u.auth.status_code = cpu_to_le16(0);
 655         if (extra)
 656                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 657
 658         ieee80211_sta_tx(dev, skb, encrypt);
 659 }
 660
 661
 662 static void ieee80211_authenticate(struct net_device *dev,
 663                                    struct ieee80211_if_sta *ifsta)
 664 {
 665         DECLARE_MAC_BUF(mac);
 666
 667         ifsta->auth_tries++;
 668         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 669                 printk(KERN_DEBUG "%s: authentication with AP %s"
 670                        " timed out\n",
 671                        dev->name, print_mac(mac, ifsta->bssid));
 672                 ifsta->state = IEEE80211_DISABLED;
 673                 return;
 674         }
 675
 676         ifsta->state = IEEE80211_AUTHENTICATE;
 677         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 678                dev->name, print_mac(mac, ifsta->bssid));
 679
 680         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 681
 682         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 683 }
 684
 685 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 686                                       struct ieee80211_supported_band *sband,
 687                                       u64 *rates)
 688 {
 689         int i, j, count;
 690         *rates = 0;
 691         count = 0;
 692         for (i = 0; i < bss->supp_rates_len; i++) {
 693                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 694
 695                 for (j = 0; j < sband->n_bitrates; j++)
 696                         if (sband->bitrates[j].bitrate == rate) {
 697                                 *rates |= BIT(j);
 698                                 count++;
 699                                 break;
 700                         }
 701         }
 702
 703         return count;
 704 }
 705
 706 static void ieee80211_send_assoc(struct net_device *dev,
 707                                  struct ieee80211_if_sta *ifsta)
 708 {
 709         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 710         struct sk_buff *skb;
 711         struct ieee80211_mgmt *mgmt;
 712         u8 *pos, *ies;
 713         int i, len, count, rates_len, supp_rates_len;
 714         u16 capab;
 715         struct ieee80211_sta_bss *bss;
 716         int wmm = 0;
 717         struct ieee80211_supported_band *sband;
 718         u64 rates = 0;
 719
 720         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 721                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 722                             ifsta->ssid_len);
 723         if (!skb) {
 724                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 725                        "frame\n", dev->name);
 726                 return;
 727         }
 728         skb_reserve(skb, local->hw.extra_tx_headroom);
 729
 730         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 731
 732         capab = ifsta->capab;
 733
 734         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 735                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 736                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 737                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 738                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 739         }
 740
 741         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 742                                    local->hw.conf.channel->center_freq,
 743                                    ifsta->ssid, ifsta->ssid_len);
 744         if (bss) {
 745                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 746                         capab |= WLAN_CAPABILITY_PRIVACY;
 747                 if (bss->wmm_ie)
 748                         wmm = 1;
 749
 750                 /* get all rates supported by the device and the AP as
 751                  * some APs don't like getting a superset of their rates
 752                  * in the association request (e.g. D-Link DAP 1353 in
 753                  * b-only mode) */
 754                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 755
 756                 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 757                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 758                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 759
 760                 ieee80211_rx_bss_put(local, bss);
 761         } else {
 762                 rates = ~0;
 763                 rates_len = sband->n_bitrates;
 764         }
 765
 766         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 767         memset(mgmt, 0, 24);
 768         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 769         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 770         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 771
 772         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 773                 skb_put(skb, 10);
 774                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 775                                                    IEEE80211_STYPE_REASSOC_REQ);
 776                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 777                 mgmt->u.reassoc_req.listen_interval =
 778                                 cpu_to_le16(local->hw.conf.listen_interval);
 779                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 780                        ETH_ALEN);
 781         } else {
 782                 skb_put(skb, 4);
 783                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 784                                                    IEEE80211_STYPE_ASSOC_REQ);
 785                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 786                 mgmt->u.reassoc_req.listen_interval =
 787                                 cpu_to_le16(local->hw.conf.listen_interval);
 788         }
 789
 790         /* SSID */
 791         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 792         *pos++ = WLAN_EID_SSID;
 793         *pos++ = ifsta->ssid_len;
 794         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 795
 796         /* add all rates which were marked to be used above */
 797         supp_rates_len = rates_len;
 798         if (supp_rates_len > 8)
 799                 supp_rates_len = 8;
 800
 801         len = sband->n_bitrates;
 802         pos = skb_put(skb, supp_rates_len + 2);
 803         *pos++ = WLAN_EID_SUPP_RATES;
 804         *pos++ = supp_rates_len;
 805
 806         count = 0;
 807         for (i = 0; i < sband->n_bitrates; i++) {
 808                 if (BIT(i) & rates) {
 809                         int rate = sband->bitrates[i].bitrate;
 810                         *pos++ = (u8) (rate / 5);
 811                         if (++count == 8)
 812                                 break;
 813                 }
 814         }
 815
 816         if (count == 8) {
 817                 pos = skb_put(skb, rates_len - count + 2);
 818                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 819                 *pos++ = rates_len - count;
 820
 821                 for (i++; i < sband->n_bitrates; i++) {
 822                         if (BIT(i) & rates) {
 823                                 int rate = sband->bitrates[i].bitrate;
 824                                 *pos++ = (u8) (rate / 5);
 825                         }
 826                 }
 827         }
 828
 829         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 830                 /* 1. power capabilities */
 831                 pos = skb_put(skb, 4);
 832                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 833                 *pos++ = 2;
 834                 *pos++ = 0; /* min tx power */
 835                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 836
 837                 /* 2. supported channels */
 838                 /* TODO: get this in reg domain format */
 839                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 840                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 841                 *pos++ = 2 * sband->n_channels;
 842                 for (i = 0; i < sband->n_channels; i++) {
 843                         *pos++ = ieee80211_frequency_to_channel(
 844                                         sband->channels[i].center_freq);
 845                         *pos++ = 1; /* one channel in the subband*/
 846                 }
 847         }
 848
 849         if (ifsta->extra_ie) {
 850                 pos = skb_put(skb, ifsta->extra_ie_len);
 851                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 852         }
 853
 854         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 855                 pos = skb_put(skb, 9);
 856                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 857                 *pos++ = 7; /* len */
 858                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 859                 *pos++ = 0x50;
 860                 *pos++ = 0xf2;
 861                 *pos++ = 2; /* WME */
 862                 *pos++ = 0; /* WME info */
 863                 *pos++ = 1; /* WME ver */
 864                 *pos++ = 0;
 865         }
 866
 867         /* wmm support is a must to HT */
 868         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 869             sband->ht_info.ht_supported && bss->ht_add_ie) {
 870                 struct ieee80211_ht_addt_info *ht_add_info =
 871                         (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
 872                 u16 cap = sband->ht_info.cap;
 873                 __le16 tmp;
 874                 u32 flags = local->hw.conf.channel->flags;
 875
 876                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 877                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 878                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 879                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 880                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 881                         }
 882                         break;
 883                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 884                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 885                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 886                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 887                         }
 888                         break;
 889                 }
 890
 891                 tmp = cpu_to_le16(cap);
 892                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 893                 *pos++ = WLAN_EID_HT_CAPABILITY;
 894                 *pos++ = sizeof(struct ieee80211_ht_cap);
 895                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 896                 memcpy(pos, &tmp, sizeof(u16));
 897                 pos += sizeof(u16);
 898                 /* TODO: needs a define here for << 2 */
 899                 *pos++ = sband->ht_info.ampdu_factor |
 900                          (sband->ht_info.ampdu_density << 2);
 901                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 902         }
 903
 904         kfree(ifsta->assocreq_ies);
 905         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 906         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 907         if (ifsta->assocreq_ies)
 908                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 909
 910         ieee80211_sta_tx(dev, skb, 0);
 911 }
 912
 913
 914 static void ieee80211_send_deauth(struct net_device *dev,
 915                                   struct ieee80211_if_sta *ifsta, u16 reason)
 916 {
 917         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 918         struct sk_buff *skb;
 919         struct ieee80211_mgmt *mgmt;
 920
 921         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 922         if (!skb) {
 923                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 924                        "frame\n", dev->name);
 925                 return;
 926         }
 927         skb_reserve(skb, local->hw.extra_tx_headroom);
 928
 929         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 930         memset(mgmt, 0, 24);
 931         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 932         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 933         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 934         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 935                                            IEEE80211_STYPE_DEAUTH);
 936         skb_put(skb, 2);
 937         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 938
 939         ieee80211_sta_tx(dev, skb, 0);
 940 }
 941
 942
 943 static void ieee80211_send_disassoc(struct net_device *dev,
 944                                     struct ieee80211_if_sta *ifsta, u16 reason)
 945 {
 946         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 947         struct sk_buff *skb;
 948         struct ieee80211_mgmt *mgmt;
 949
 950         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 951         if (!skb) {
 952                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 953                        "frame\n", dev->name);
 954                 return;
 955         }
 956         skb_reserve(skb, local->hw.extra_tx_headroom);
 957
 958         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 959         memset(mgmt, 0, 24);
 960         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 961         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 962         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 963         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 964                                            IEEE80211_STYPE_DISASSOC);
 965         skb_put(skb, 2);
 966         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 967
 968         ieee80211_sta_tx(dev, skb, 0);
 969 }
 970
 971
 972 static int ieee80211_privacy_mismatch(struct net_device *dev,
 973                                       struct ieee80211_if_sta *ifsta)
 974 {
 975         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 976         struct ieee80211_sta_bss *bss;
 977         int bss_privacy;
 978         int wep_privacy;
 979         int privacy_invoked;
 980
 981         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 982                 return 0;
 983
 984         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 985                                    local->hw.conf.channel->center_freq,
 986                                    ifsta->ssid, ifsta->ssid_len);
 987         if (!bss)
 988                 return 0;
 989
 990         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 991         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 992         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 993
 994         ieee80211_rx_bss_put(local, bss);
 995
 996         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 997                 return 0;
 998
 999         return 1;
1000 }
1001
1002
1003 static void ieee80211_associate(struct net_device *dev,
1004                                 struct ieee80211_if_sta *ifsta)
1005 {
1006         DECLARE_MAC_BUF(mac);
1007
1008         ifsta->assoc_tries++;
1009         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1010                 printk(KERN_DEBUG "%s: association with AP %s"
1011                        " timed out\n",
1012                        dev->name, print_mac(mac, ifsta->bssid));
1013                 ifsta->state = IEEE80211_DISABLED;
1014                 return;
1015         }
1016
1017         ifsta->state = IEEE80211_ASSOCIATE;
1018         printk(KERN_DEBUG "%s: associate with AP %s\n",
1019                dev->name, print_mac(mac, ifsta->bssid));
1020         if (ieee80211_privacy_mismatch(dev, ifsta)) {
1021                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1022                        "mixed-cell disabled - abort association\n", dev->name);
1023                 ifsta->state = IEEE80211_DISABLED;
1024                 return;
1025         }
1026
1027         ieee80211_send_assoc(dev, ifsta);
1028
1029         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1030 }
1031
1032
1033 static void ieee80211_associated(struct net_device *dev,
1034                                  struct ieee80211_if_sta *ifsta)
1035 {
1036         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1037         struct sta_info *sta;
1038         int disassoc;
1039         DECLARE_MAC_BUF(mac);
1040
1041         /* TODO: start monitoring current AP signal quality and number of
1042          * missed beacons. Scan other channels every now and then and search
1043          * for better APs. */
1044         /* TODO: remove expired BSSes */
1045
1046         ifsta->state = IEEE80211_ASSOCIATED;
1047
1048         rcu_read_lock();
1049
1050         sta = sta_info_get(local, ifsta->bssid);
1051         if (!sta) {
1052                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1053                        dev->name, print_mac(mac, ifsta->bssid));
1054                 disassoc = 1;
1055         } else {
1056                 disassoc = 0;
1057                 if (time_after(jiffies,
1058                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1059                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1060                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1061                                        "current AP %s - assume out of "
1062                                        "range\n",
1063                                        dev->name, print_mac(mac, ifsta->bssid));
1064                                 disassoc = 1;
1065                                 sta_info_unlink(&sta);
1066                         } else
1067                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1068                                                          local->scan_ssid,
1069                                                          local->scan_ssid_len);
1070                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1071                 } else {
1072                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1073                         if (time_after(jiffies, ifsta->last_probe +
1074                                        IEEE80211_PROBE_INTERVAL)) {
1075                                 ifsta->last_probe = jiffies;
1076                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1077                                                          ifsta->ssid,
1078                                                          ifsta->ssid_len);
1079                         }
1080                 }
1081         }
1082
1083         rcu_read_unlock();
1084
1085         if (disassoc && sta)
1086                 sta_info_destroy(sta);
1087
1088         if (disassoc) {
1089                 ifsta->state = IEEE80211_DISABLED;
1090                 ieee80211_set_associated(dev, ifsta, 0);
1091         } else {
1092                 mod_timer(&ifsta->timer, jiffies +
1093                                       IEEE80211_MONITORING_INTERVAL);
1094         }
1095 }
1096
1097
1098 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1099                                      u8 *ssid, size_t ssid_len)
1100 {
1101         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1102         struct ieee80211_supported_band *sband;
1103         struct sk_buff *skb;
1104         struct ieee80211_mgmt *mgmt;
1105         u8 *pos, *supp_rates, *esupp_rates = NULL;
1106         int i;
1107
1108         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1109         if (!skb) {
1110                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1111                        "request\n", dev->name);
1112                 return;
1113         }
1114         skb_reserve(skb, local->hw.extra_tx_headroom);
1115
1116         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1117         memset(mgmt, 0, 24);
1118         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1119                                            IEEE80211_STYPE_PROBE_REQ);
1120         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1121         if (dst) {
1122                 memcpy(mgmt->da, dst, ETH_ALEN);
1123                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1124         } else {
1125                 memset(mgmt->da, 0xff, ETH_ALEN);
1126                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1127         }
1128         pos = skb_put(skb, 2 + ssid_len);
1129         *pos++ = WLAN_EID_SSID;
1130         *pos++ = ssid_len;
1131         memcpy(pos, ssid, ssid_len);
1132
1133         supp_rates = skb_put(skb, 2);
1134         supp_rates[0] = WLAN_EID_SUPP_RATES;
1135         supp_rates[1] = 0;
1136         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1137
1138         for (i = 0; i < sband->n_bitrates; i++) {
1139                 struct ieee80211_rate *rate = &sband->bitrates[i];
1140                 if (esupp_rates) {
1141                         pos = skb_put(skb, 1);
1142                         esupp_rates[1]++;
1143                 } else if (supp_rates[1] == 8) {
1144                         esupp_rates = skb_put(skb, 3);
1145                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1146                         esupp_rates[1] = 1;
1147                         pos = &esupp_rates[2];
1148                 } else {
1149                         pos = skb_put(skb, 1);
1150                         supp_rates[1]++;
1151                 }
1152                 *pos = rate->bitrate / 5;
1153         }
1154
1155         ieee80211_sta_tx(dev, skb, 0);
1156 }
1157
1158
1159 static int ieee80211_sta_wep_configured(struct net_device *dev)
1160 {
1161         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1162         if (!sdata || !sdata->default_key ||
1163             sdata->default_key->conf.alg != ALG_WEP)
1164                 return 0;
1165         return 1;
1166 }
1167
1168
1169 static void ieee80211_auth_completed(struct net_device *dev,
1170                                      struct ieee80211_if_sta *ifsta)
1171 {
1172         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1173         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1174         ieee80211_associate(dev, ifsta);
1175 }
1176
1177
1178 static void ieee80211_auth_challenge(struct net_device *dev,
1179                                      struct ieee80211_if_sta *ifsta,
1180                                      struct ieee80211_mgmt *mgmt,
1181                                      size_t len)
1182 {
1183         u8 *pos;
1184         struct ieee802_11_elems elems;
1185
1186         pos = mgmt->u.auth.variable;
1187         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1188         if (!elems.challenge)
1189                 return;
1190         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1191                             elems.challenge_len + 2, 1);
1192 }
1193
1194 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1195                                         u8 dialog_token, u16 status, u16 policy,
1196                                         u16 buf_size, u16 timeout)
1197 {
1198         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1199         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1200         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1201         struct sk_buff *skb;
1202         struct ieee80211_mgmt *mgmt;
1203         u16 capab;
1204
1205         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1206
1207         if (!skb) {
1208                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1209                        "for addba resp frame\n", dev->name);
1210                 return;
1211         }
1212
1213         skb_reserve(skb, local->hw.extra_tx_headroom);
1214         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1215         memset(mgmt, 0, 24);
1216         memcpy(mgmt->da, da, ETH_ALEN);
1217         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1218         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1219                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1220         else
1221                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1222         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1223                                            IEEE80211_STYPE_ACTION);
1224
1225         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1226         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1227         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1228         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1229
1230         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1231         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1232         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1233
1234         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1235         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1236         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1237
1238         ieee80211_sta_tx(dev, skb, 0);
1239
1240         return;
1241 }
1242
1243 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1244                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1245                                 u16 agg_size, u16 timeout)
1246 {
1247         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1248         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1249         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1250         struct sk_buff *skb;
1251         struct ieee80211_mgmt *mgmt;
1252         u16 capab;
1253
1254         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1255
1256         if (!skb) {
1257                 printk(KERN_ERR "%s: failed to allocate buffer "
1258                                 "for addba request frame\n", dev->name);
1259                 return;
1260         }
1261         skb_reserve(skb, local->hw.extra_tx_headroom);
1262         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1263         memset(mgmt, 0, 24);
1264         memcpy(mgmt->da, da, ETH_ALEN);
1265         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1266         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1267                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1268         else
1269                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1270
1271         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1272                                         IEEE80211_STYPE_ACTION);
1273
1274         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1275
1276         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1277         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1278
1279         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1280         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1281         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1282         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1283
1284         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1285
1286         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1287         mgmt->u.action.u.addba_req.start_seq_num =
1288                                         cpu_to_le16(start_seq_num << 4);
1289
1290         ieee80211_sta_tx(dev, skb, 0);
1291 }
1292
1293 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1294                                                 struct ieee80211_mgmt *mgmt,
1295                                                 size_t len)
1296 {
1297         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1298         struct ieee80211_hw *hw = &local->hw;
1299         struct ieee80211_conf *conf = &hw->conf;
1300         struct sta_info *sta;
1301         struct tid_ampdu_rx *tid_agg_rx;
1302         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1303         u8 dialog_token;
1304         int ret = -EOPNOTSUPP;
1305         DECLARE_MAC_BUF(mac);
1306
1307         rcu_read_lock();
1308
1309         sta = sta_info_get(local, mgmt->sa);
1310         if (!sta) {
1311                 rcu_read_unlock();
1312                 return;
1313         }
1314
1315         /* extract session parameters from addba request frame */
1316         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1317         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1318         start_seq_num =
1319                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1320
1321         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1322         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1323         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1324         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1325
1326         status = WLAN_STATUS_REQUEST_DECLINED;
1327
1328         /* sanity check for incoming parameters:
1329          * check if configuration can support the BA policy
1330          * and if buffer size does not exceeds max value */
1331         if (((ba_policy != 1)
1332                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1333                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1334                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1335 #ifdef CONFIG_MAC80211_HT_DEBUG
1336                 if (net_ratelimit())
1337                         printk(KERN_DEBUG "AddBA Req with bad params from "
1338                                 "%s on tid %u. policy %d, buffer size %d\n",
1339                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1340                                 buf_size);
1341 #endif /* CONFIG_MAC80211_HT_DEBUG */
1342                 goto end_no_lock;
1343         }
1344         /* determine default buffer size */
1345         if (buf_size == 0) {
1346                 struct ieee80211_supported_band *sband;
1347
1348                 sband = local->hw.wiphy->bands[conf->channel->band];
1349                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1350                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1351         }
1352
1353
1354         /* examine state machine */
1355         spin_lock_bh(&sta->lock);
1356
1357         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1358 #ifdef CONFIG_MAC80211_HT_DEBUG
1359                 if (net_ratelimit())
1360                         printk(KERN_DEBUG "unexpected AddBA Req from "
1361                                 "%s on tid %u\n",
1362                                 print_mac(mac, mgmt->sa), tid);
1363 #endif /* CONFIG_MAC80211_HT_DEBUG */
1364                 goto end;
1365         }
1366
1367         /* prepare A-MPDU MLME for Rx aggregation */
1368         sta->ampdu_mlme.tid_rx[tid] =
1369                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1370         if (!sta->ampdu_mlme.tid_rx[tid]) {
1371 #ifdef CONFIG_MAC80211_HT_DEBUG
1372                 if (net_ratelimit())
1373                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1374                                         tid);
1375 #endif
1376                 goto end;
1377         }
1378         /* rx timer */
1379         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1380                                 sta_rx_agg_session_timer_expired;
1381         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1382                                 (unsigned long)&sta->timer_to_tid[tid];
1383         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1384
1385         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1386
1387         /* prepare reordering buffer */
1388         tid_agg_rx->reorder_buf =
1389                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1390         if (!tid_agg_rx->reorder_buf) {
1391 #ifdef CONFIG_MAC80211_HT_DEBUG
1392                 if (net_ratelimit())
1393                         printk(KERN_ERR "can not allocate reordering buffer "
1394                                "to tid %d\n", tid);
1395 #endif
1396                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1397                 goto end;
1398         }
1399         memset(tid_agg_rx->reorder_buf, 0,
1400                 buf_size * sizeof(struct sk_buff *));
1401
1402         if (local->ops->ampdu_action)
1403                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1404                                                sta->addr, tid, &start_seq_num);
1405 #ifdef CONFIG_MAC80211_HT_DEBUG
1406         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1407 #endif /* CONFIG_MAC80211_HT_DEBUG */
1408
1409         if (ret) {
1410                 kfree(tid_agg_rx->reorder_buf);
1411                 kfree(tid_agg_rx);
1412                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1413                 goto end;
1414         }
1415
1416         /* change state and send addba resp */
1417         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1418         tid_agg_rx->dialog_token = dialog_token;
1419         tid_agg_rx->ssn = start_seq_num;
1420         tid_agg_rx->head_seq_num = start_seq_num;
1421         tid_agg_rx->buf_size = buf_size;
1422         tid_agg_rx->timeout = timeout;
1423         tid_agg_rx->stored_mpdu_num = 0;
1424         status = WLAN_STATUS_SUCCESS;
1425 end:
1426         spin_unlock_bh(&sta->lock);
1427
1428 end_no_lock:
1429         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1430                                   dialog_token, status, 1, buf_size, timeout);
1431         rcu_read_unlock();
1432 }
1433
1434 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1435                                              struct ieee80211_mgmt *mgmt,
1436                                              size_t len)
1437 {
1438         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1439         struct ieee80211_hw *hw = &local->hw;
1440         struct sta_info *sta;
1441         u16 capab;
1442         u16 tid;
1443         u8 *state;
1444
1445         rcu_read_lock();
1446
1447         sta = sta_info_get(local, mgmt->sa);
1448         if (!sta) {
1449                 rcu_read_unlock();
1450                 return;
1451         }
1452
1453         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1454         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1455
1456         state = &sta->ampdu_mlme.tid_state_tx[tid];
1457
1458         spin_lock_bh(&sta->lock);
1459
1460         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1461                 spin_unlock_bh(&sta->lock);
1462                 goto addba_resp_exit;
1463         }
1464
1465         if (mgmt->u.action.u.addba_resp.dialog_token !=
1466                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1467                 spin_unlock_bh(&sta->lock);
1468 #ifdef CONFIG_MAC80211_HT_DEBUG
1469                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1470 #endif /* CONFIG_MAC80211_HT_DEBUG */
1471                 goto addba_resp_exit;
1472         }
1473
1474         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1475 #ifdef CONFIG_MAC80211_HT_DEBUG
1476         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1477 #endif /* CONFIG_MAC80211_HT_DEBUG */
1478         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1479                         == WLAN_STATUS_SUCCESS) {
1480                 *state |= HT_ADDBA_RECEIVED_MSK;
1481                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1482
1483                 if (*state == HT_AGG_STATE_OPERATIONAL)
1484                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1485
1486                 spin_unlock_bh(&sta->lock);
1487         } else {
1488                 sta->ampdu_mlme.addba_req_num[tid]++;
1489                 /* this will allow the state check in stop_BA_session */
1490                 *state = HT_AGG_STATE_OPERATIONAL;
1491                 spin_unlock_bh(&sta->lock);
1492                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1493                                              WLAN_BACK_INITIATOR);
1494         }
1495
1496 addba_resp_exit:
1497         rcu_read_unlock();
1498 }
1499
1500 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1501                           u16 initiator, u16 reason_code)
1502 {
1503         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1504         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1505         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1506         struct sk_buff *skb;
1507         struct ieee80211_mgmt *mgmt;
1508         u16 params;
1509
1510         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1511
1512         if (!skb) {
1513                 printk(KERN_ERR "%s: failed to allocate buffer "
1514                                         "for delba frame\n", dev->name);
1515                 return;
1516         }
1517
1518         skb_reserve(skb, local->hw.extra_tx_headroom);
1519         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1520         memset(mgmt, 0, 24);
1521         memcpy(mgmt->da, da, ETH_ALEN);
1522         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1523         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1524                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1525         else
1526                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1527         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1528                                         IEEE80211_STYPE_ACTION);
1529
1530         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1531
1532         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1533         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1534         params = (u16)(initiator << 11);        /* bit 11 initiator */
1535         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1536
1537         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1538         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1539
1540         ieee80211_sta_tx(dev, skb, 0);
1541 }
1542
1543 void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn)
1544 {
1545         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1546         struct sk_buff *skb;
1547         struct ieee80211_bar *bar;
1548         u16 bar_control = 0;
1549
1550         skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1551         if (!skb) {
1552                 printk(KERN_ERR "%s: failed to allocate buffer for "
1553                         "bar frame\n", dev->name);
1554                 return;
1555         }
1556         skb_reserve(skb, local->hw.extra_tx_headroom);
1557         bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1558         memset(bar, 0, sizeof(*bar));
1559         bar->frame_control = IEEE80211_FC(IEEE80211_FTYPE_CTL,
1560                                         IEEE80211_STYPE_BACK_REQ);
1561         memcpy(bar->ra, ra, ETH_ALEN);
1562         memcpy(bar->ta, dev->dev_addr, ETH_ALEN);
1563         bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1564         bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1565         bar_control |= (u16)(tid << 12);
1566         bar->control = cpu_to_le16(bar_control);
1567         bar->start_seq_num = cpu_to_le16(ssn);
1568
1569         ieee80211_sta_tx(dev, skb, 0);
1570 }
1571
1572 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1573                                         u16 initiator, u16 reason)
1574 {
1575         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1576         struct ieee80211_hw *hw = &local->hw;
1577         struct sta_info *sta;
1578         int ret, i;
1579         DECLARE_MAC_BUF(mac);
1580
1581         rcu_read_lock();
1582
1583         sta = sta_info_get(local, ra);
1584         if (!sta) {
1585                 rcu_read_unlock();
1586                 return;
1587         }
1588
1589         /* check if TID is in operational state */
1590         spin_lock_bh(&sta->lock);
1591         if (sta->ampdu_mlme.tid_state_rx[tid]
1592                                 != HT_AGG_STATE_OPERATIONAL) {
1593                 spin_unlock_bh(&sta->lock);
1594                 rcu_read_unlock();
1595                 return;
1596         }
1597         sta->ampdu_mlme.tid_state_rx[tid] =
1598                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1599                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1600         spin_unlock_bh(&sta->lock);
1601
1602         /* stop HW Rx aggregation. ampdu_action existence
1603          * already verified in session init so we add the BUG_ON */
1604         BUG_ON(!local->ops->ampdu_action);
1605
1606 #ifdef CONFIG_MAC80211_HT_DEBUG
1607         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1608                                 print_mac(mac, ra), tid);
1609 #endif /* CONFIG_MAC80211_HT_DEBUG */
1610
1611         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1612                                         ra, tid, NULL);
1613         if (ret)
1614                 printk(KERN_DEBUG "HW problem - can not stop rx "
1615                                 "aggregation for tid %d\n", tid);
1616
1617         /* shutdown timer has not expired */
1618         if (initiator != WLAN_BACK_TIMER)
1619                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1620
1621         /* check if this is a self generated aggregation halt */
1622         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1623                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1624
1625         /* free the reordering buffer */
1626         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1627                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1628                         /* release the reordered frames */
1629                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1630                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1631                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1632                 }
1633         }
1634         /* free resources */
1635         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1636         kfree(sta->ampdu_mlme.tid_rx[tid]);
1637         sta->ampdu_mlme.tid_rx[tid] = NULL;
1638         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1639
1640         rcu_read_unlock();
1641 }
1642
1643
1644 static void ieee80211_sta_process_delba(struct net_device *dev,
1645                         struct ieee80211_mgmt *mgmt, size_t len)
1646 {
1647         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1648         struct sta_info *sta;
1649         u16 tid, params;
1650         u16 initiator;
1651         DECLARE_MAC_BUF(mac);
1652
1653         rcu_read_lock();
1654
1655         sta = sta_info_get(local, mgmt->sa);
1656         if (!sta) {
1657                 rcu_read_unlock();
1658                 return;
1659         }
1660
1661         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1662         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1663         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1664
1665 #ifdef CONFIG_MAC80211_HT_DEBUG
1666         if (net_ratelimit())
1667                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1668                         print_mac(mac, mgmt->sa),
1669                         initiator ? "initiator" : "recipient", tid,
1670                         mgmt->u.action.u.delba.reason_code);
1671 #endif /* CONFIG_MAC80211_HT_DEBUG */
1672
1673         if (initiator == WLAN_BACK_INITIATOR)
1674                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1675                                                  WLAN_BACK_INITIATOR, 0);
1676         else { /* WLAN_BACK_RECIPIENT */
1677                 spin_lock_bh(&sta->lock);
1678                 sta->ampdu_mlme.tid_state_tx[tid] =
1679                                 HT_AGG_STATE_OPERATIONAL;
1680                 spin_unlock_bh(&sta->lock);
1681                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1682                                              WLAN_BACK_RECIPIENT);
1683         }
1684         rcu_read_unlock();
1685 }
1686
1687 /*
1688  * After sending add Block Ack request we activated a timer until
1689  * add Block Ack response will arrive from the recipient.
1690  * If this timer expires sta_addba_resp_timer_expired will be executed.
1691  */
1692 void sta_addba_resp_timer_expired(unsigned long data)
1693 {
1694         /* not an elegant detour, but there is no choice as the timer passes
1695          * only one argument, and both sta_info and TID are needed, so init
1696          * flow in sta_info_create gives the TID as data, while the timer_to_id
1697          * array gives the sta through container_of */
1698         u16 tid = *(u8 *)data;
1699         struct sta_info *temp_sta = container_of((void *)data,
1700                 struct sta_info, timer_to_tid[tid]);
1701
1702         struct ieee80211_local *local = temp_sta->local;
1703         struct ieee80211_hw *hw = &local->hw;
1704         struct sta_info *sta;
1705         u8 *state;
1706
1707         rcu_read_lock();
1708
1709         sta = sta_info_get(local, temp_sta->addr);
1710         if (!sta) {
1711                 rcu_read_unlock();
1712                 return;
1713         }
1714
1715         state = &sta->ampdu_mlme.tid_state_tx[tid];
1716         /* check if the TID waits for addBA response */
1717         spin_lock_bh(&sta->lock);
1718         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1719                 spin_unlock_bh(&sta->lock);
1720                 *state = HT_AGG_STATE_IDLE;
1721 #ifdef CONFIG_MAC80211_HT_DEBUG
1722                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1723                                 "expecting addBA response there", tid);
1724 #endif
1725                 goto timer_expired_exit;
1726         }
1727
1728 #ifdef CONFIG_MAC80211_HT_DEBUG
1729         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1730 #endif
1731
1732         /* go through the state check in stop_BA_session */
1733         *state = HT_AGG_STATE_OPERATIONAL;
1734         spin_unlock_bh(&sta->lock);
1735         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1736                                      WLAN_BACK_INITIATOR);
1737
1738 timer_expired_exit:
1739         rcu_read_unlock();
1740 }
1741
1742 /*
1743  * After accepting the AddBA Request we activated a timer,
1744  * resetting it after each frame that arrives from the originator.
1745  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1746  */
1747 static void sta_rx_agg_session_timer_expired(unsigned long data)
1748 {
1749         /* not an elegant detour, but there is no choice as the timer passes
1750          * only one argument, and various sta_info are needed here, so init
1751          * flow in sta_info_create gives the TID as data, while the timer_to_id
1752          * array gives the sta through container_of */
1753         u8 *ptid = (u8 *)data;
1754         u8 *timer_to_id = ptid - *ptid;
1755         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1756                                          timer_to_tid[0]);
1757
1758 #ifdef CONFIG_MAC80211_HT_DEBUG
1759         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1760 #endif
1761         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1762                                          (u16)*ptid, WLAN_BACK_TIMER,
1763                                          WLAN_REASON_QSTA_TIMEOUT);
1764 }
1765
1766 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1767 {
1768         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1769         int i;
1770
1771         for (i = 0; i <  STA_TID_NUM; i++) {
1772                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1773                                              WLAN_BACK_INITIATOR);
1774                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1775                                                  WLAN_BACK_RECIPIENT,
1776                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1777         }
1778 }
1779
1780 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1781                                         struct ieee80211_msrment_ie *request_ie,
1782                                         const u8 *da, const u8 *bssid,
1783                                         u8 dialog_token)
1784 {
1785         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1786         struct sk_buff *skb;
1787         struct ieee80211_mgmt *msr_report;
1788
1789         skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1790                                 sizeof(struct ieee80211_msrment_ie));
1791
1792         if (!skb) {
1793                 printk(KERN_ERR "%s: failed to allocate buffer for "
1794                                 "measurement report frame\n", dev->name);
1795                 return;
1796         }
1797
1798         skb_reserve(skb, local->hw.extra_tx_headroom);
1799         msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1800         memset(msr_report, 0, 24);
1801         memcpy(msr_report->da, da, ETH_ALEN);
1802         memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1803         memcpy(msr_report->bssid, bssid, ETH_ALEN);
1804         msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1805                                                 IEEE80211_STYPE_ACTION);
1806
1807         skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1808         msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1809         msr_report->u.action.u.measurement.action_code =
1810                                 WLAN_ACTION_SPCT_MSR_RPRT;
1811         msr_report->u.action.u.measurement.dialog_token = dialog_token;
1812
1813         msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1814         msr_report->u.action.u.measurement.length =
1815                         sizeof(struct ieee80211_msrment_ie);
1816
1817         memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1818                 sizeof(struct ieee80211_msrment_ie));
1819         msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1820         msr_report->u.action.u.measurement.msr_elem.mode |=
1821                         IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1822         msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1823
1824         ieee80211_sta_tx(dev, skb, 0);
1825 }
1826
1827 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1828                                                 struct ieee80211_mgmt *mgmt,
1829                                                 size_t len)
1830 {
1831         /*
1832          * Ignoring measurement request is spec violation.
1833          * Mandatory measurements must be reported optional
1834          * measurements might be refused or reported incapable
1835          * For now just refuse
1836          * TODO: Answer basic measurement as unmeasured
1837          */
1838         ieee80211_send_refuse_measurement_request(dev,
1839                         &mgmt->u.action.u.measurement.msr_elem,
1840                         mgmt->sa, mgmt->bssid,
1841                         mgmt->u.action.u.measurement.dialog_token);
1842 }
1843
1844
1845 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1846                                    struct ieee80211_if_sta *ifsta,
1847                                    struct ieee80211_mgmt *mgmt,
1848                                    size_t len)
1849 {
1850         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1851         u16 auth_alg, auth_transaction, status_code;
1852         DECLARE_MAC_BUF(mac);
1853
1854         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1855             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1856                 return;
1857
1858         if (len < 24 + 6)
1859                 return;
1860
1861         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1862             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1863                 return;
1864
1865         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1866             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1867                 return;
1868
1869         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1870         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1871         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1872
1873         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1874                 /*
1875                  * IEEE 802.11 standard does not require authentication in IBSS
1876                  * networks and most implementations do not seem to use it.
1877                  * However, try to reply to authentication attempts if someone
1878                  * has actually implemented this.
1879                  */
1880                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1881                         return;
1882                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1883         }
1884
1885         if (auth_alg != ifsta->auth_alg ||
1886             auth_transaction != ifsta->auth_transaction)
1887                 return;
1888
1889         if (status_code != WLAN_STATUS_SUCCESS) {
1890                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1891                         u8 algs[3];
1892                         const int num_algs = ARRAY_SIZE(algs);
1893                         int i, pos;
1894                         algs[0] = algs[1] = algs[2] = 0xff;
1895                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1896                                 algs[0] = WLAN_AUTH_OPEN;
1897                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1898                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1899                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1900                                 algs[2] = WLAN_AUTH_LEAP;
1901                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1902                                 pos = 0;
1903                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1904                                 pos = 1;
1905                         else
1906                                 pos = 2;
1907                         for (i = 0; i < num_algs; i++) {
1908                                 pos++;
1909                                 if (pos >= num_algs)
1910                                         pos = 0;
1911                                 if (algs[pos] == ifsta->auth_alg ||
1912                                     algs[pos] == 0xff)
1913                                         continue;
1914                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1915                                     !ieee80211_sta_wep_configured(dev))
1916                                         continue;
1917                                 ifsta->auth_alg = algs[pos];
1918                                 break;
1919                         }
1920                 }
1921                 return;
1922         }
1923
1924         switch (ifsta->auth_alg) {
1925         case WLAN_AUTH_OPEN:
1926         case WLAN_AUTH_LEAP:
1927                 ieee80211_auth_completed(dev, ifsta);
1928                 break;
1929         case WLAN_AUTH_SHARED_KEY:
1930                 if (ifsta->auth_transaction == 4)
1931                         ieee80211_auth_completed(dev, ifsta);
1932                 else
1933                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1934                 break;
1935         }
1936 }
1937
1938
1939 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1940                                      struct ieee80211_if_sta *ifsta,
1941                                      struct ieee80211_mgmt *mgmt,
1942                                      size_t len)
1943 {
1944         u16 reason_code;
1945         DECLARE_MAC_BUF(mac);
1946
1947         if (len < 24 + 2)
1948                 return;
1949
1950         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1951                 return;
1952
1953         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1954
1955         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1956                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1957
1958         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1959             ifsta->state == IEEE80211_ASSOCIATE ||
1960             ifsta->state == IEEE80211_ASSOCIATED) {
1961                 ifsta->state = IEEE80211_AUTHENTICATE;
1962                 mod_timer(&ifsta->timer, jiffies +
1963                                       IEEE80211_RETRY_AUTH_INTERVAL);
1964         }
1965
1966         ieee80211_set_disassoc(dev, ifsta, 1);
1967         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1968 }
1969
1970
1971 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1972                                        struct ieee80211_if_sta *ifsta,
1973                                        struct ieee80211_mgmt *mgmt,
1974                                        size_t len)
1975 {
1976         u16 reason_code;
1977         DECLARE_MAC_BUF(mac);
1978
1979         if (len < 24 + 2)
1980                 return;
1981
1982         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1983                 return;
1984
1985         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1986
1987         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1988                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1989
1990         if (ifsta->state == IEEE80211_ASSOCIATED) {
1991                 ifsta->state = IEEE80211_ASSOCIATE;
1992                 mod_timer(&ifsta->timer, jiffies +
1993                                       IEEE80211_RETRY_AUTH_INTERVAL);
1994         }
1995
1996         ieee80211_set_disassoc(dev, ifsta, 0);
1997 }
1998
1999
2000 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2001                                          struct ieee80211_if_sta *ifsta,
2002                                          struct ieee80211_mgmt *mgmt,
2003                                          size_t len,
2004                                          int reassoc)
2005 {
2006         struct ieee80211_local *local = sdata->local;
2007         struct net_device *dev = sdata->dev;
2008         struct ieee80211_supported_band *sband;
2009         struct sta_info *sta;
2010         u64 rates, basic_rates;
2011         u16 capab_info, status_code, aid;
2012         struct ieee802_11_elems elems;
2013         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2014         u8 *pos;
2015         int i, j;
2016         DECLARE_MAC_BUF(mac);
2017         bool have_higher_than_11mbit = false;
2018
2019         /* AssocResp and ReassocResp have identical structure, so process both
2020          * of them in this function. */
2021
2022         if (ifsta->state != IEEE80211_ASSOCIATE)
2023                 return;
2024
2025         if (len < 24 + 6)
2026                 return;
2027
2028         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
2029                 return;
2030
2031         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2032         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2033         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2034
2035         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2036                "status=%d aid=%d)\n",
2037                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2038                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2039
2040         if (status_code != WLAN_STATUS_SUCCESS) {
2041                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2042                        dev->name, status_code);
2043                 /* if this was a reassociation, ensure we try a "full"
2044                  * association next time. This works around some broken APs
2045                  * which do not correctly reject reassociation requests. */
2046                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2047                 return;
2048         }
2049
2050         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2051                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2052                        "set\n", dev->name, aid);
2053         aid &= ~(BIT(15) | BIT(14));
2054
2055         pos = mgmt->u.assoc_resp.variable;
2056         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2057
2058         if (!elems.supp_rates) {
2059                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2060                        dev->name);
2061                 return;
2062         }
2063
2064         printk(KERN_DEBUG "%s: associated\n", dev->name);
2065         ifsta->aid = aid;
2066         ifsta->ap_capab = capab_info;
2067
2068         kfree(ifsta->assocresp_ies);
2069         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2070         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2071         if (ifsta->assocresp_ies)
2072                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2073
2074         rcu_read_lock();
2075
2076         /* Add STA entry for the AP */
2077         sta = sta_info_get(local, ifsta->bssid);
2078         if (!sta) {
2079                 struct ieee80211_sta_bss *bss;
2080                 int err;
2081
2082                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2083                 if (!sta) {
2084                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2085                                " the AP\n", dev->name);
2086                         rcu_read_unlock();
2087                         return;
2088                 }
2089                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2090                                            local->hw.conf.channel->center_freq,
2091                                            ifsta->ssid, ifsta->ssid_len);
2092                 if (bss) {
2093                         sta->last_signal = bss->signal;
2094                         sta->last_qual = bss->qual;
2095                         sta->last_noise = bss->noise;
2096                         ieee80211_rx_bss_put(local, bss);
2097                 }
2098
2099                 err = sta_info_insert(sta);
2100                 if (err) {
2101                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2102                                " the AP (error %d)\n", dev->name, err);
2103                         rcu_read_unlock();
2104                         return;
2105                 }
2106         }
2107
2108         /*
2109          * FIXME: Do we really need to update the sta_info's information here?
2110          *        We already know about the AP (we found it in our list) so it
2111          *        should already be filled with the right info, no?
2112          *        As is stands, all this is racy because typically we assume
2113          *        the information that is filled in here (except flags) doesn't
2114          *        change while a STA structure is alive. As such, it should move
2115          *        to between the sta_info_alloc() and sta_info_insert() above.
2116          */
2117
2118         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2119                            WLAN_STA_AUTHORIZED);
2120
2121         rates = 0;
2122         basic_rates = 0;
2123         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2124
2125         for (i = 0; i < elems.supp_rates_len; i++) {
2126                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2127
2128                 if (rate > 110)
2129                         have_higher_than_11mbit = true;
2130
2131                 for (j = 0; j < sband->n_bitrates; j++) {
2132                         if (sband->bitrates[j].bitrate == rate)
2133                                 rates |= BIT(j);
2134                         if (elems.supp_rates[i] & 0x80)
2135                                 basic_rates |= BIT(j);
2136                 }
2137         }
2138
2139         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2140                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2141
2142                 if (rate > 110)
2143                         have_higher_than_11mbit = true;
2144
2145                 for (j = 0; j < sband->n_bitrates; j++) {
2146                         if (sband->bitrates[j].bitrate == rate)
2147                                 rates |= BIT(j);
2148                         if (elems.ext_supp_rates[i] & 0x80)
2149                                 basic_rates |= BIT(j);
2150                 }
2151         }
2152
2153         sta->supp_rates[local->hw.conf.channel->band] = rates;
2154         sdata->basic_rates = basic_rates;
2155
2156         /* cf. IEEE 802.11 9.2.12 */
2157         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2158             have_higher_than_11mbit)
2159                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2160         else
2161                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2162
2163         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2164             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2165                 struct ieee80211_ht_bss_info bss_info;
2166                 ieee80211_ht_cap_ie_to_ht_info(
2167                                 (struct ieee80211_ht_cap *)
2168                                 elems.ht_cap_elem, &sta->ht_info);
2169                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2170                                 (struct ieee80211_ht_addt_info *)
2171                                 elems.ht_info_elem, &bss_info);
2172                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2173         }
2174
2175         rate_control_rate_init(sta, local);
2176
2177         if (elems.wmm_param) {
2178                 set_sta_flags(sta, WLAN_STA_WME);
2179                 rcu_read_unlock();
2180                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2181                                          elems.wmm_param_len);
2182         } else
2183                 rcu_read_unlock();
2184
2185         /* set AID and assoc capability,
2186          * ieee80211_set_associated() will tell the driver */
2187         bss_conf->aid = aid;
2188         bss_conf->assoc_capability = capab_info;
2189         ieee80211_set_associated(dev, ifsta, 1);
2190
2191         ieee80211_associated(dev, ifsta);
2192 }
2193
2194
2195 /* Caller must hold local->sta_bss_lock */
2196 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2197                                         struct ieee80211_sta_bss *bss)
2198 {
2199         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2200         u8 hash_idx;
2201
2202         if (bss_mesh_cfg(bss))
2203                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2204                                         bss_mesh_id_len(bss));
2205         else
2206                 hash_idx = STA_HASH(bss->bssid);
2207
2208         bss->hnext = local->sta_bss_hash[hash_idx];
2209         local->sta_bss_hash[hash_idx] = bss;
2210 }
2211
2212
2213 /* Caller must hold local->sta_bss_lock */
2214 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2215                                         struct ieee80211_sta_bss *bss)
2216 {
2217         struct ieee80211_sta_bss *b, *prev = NULL;
2218         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2219         while (b) {
2220                 if (b == bss) {
2221                         if (!prev)
2222                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2223                                         bss->hnext;
2224                         else
2225                                 prev->hnext = bss->hnext;
2226                         break;
2227                 }
2228                 prev = b;
2229                 b = b->hnext;
2230         }
2231 }
2232
2233
2234 static struct ieee80211_sta_bss *
2235 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2236                      u8 *ssid, u8 ssid_len)
2237 {
2238         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2239         struct ieee80211_sta_bss *bss;
2240
2241         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2242         if (!bss)
2243                 return NULL;
2244         atomic_inc(&bss->users);
2245         atomic_inc(&bss->users);
2246         memcpy(bss->bssid, bssid, ETH_ALEN);
2247         bss->freq = freq;
2248         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2249                 memcpy(bss->ssid, ssid, ssid_len);
2250                 bss->ssid_len = ssid_len;
2251         }
2252
2253         spin_lock_bh(&local->sta_bss_lock);
2254         /* TODO: order by RSSI? */
2255         list_add_tail(&bss->list, &local->sta_bss_list);
2256         __ieee80211_rx_bss_hash_add(dev, bss);
2257         spin_unlock_bh(&local->sta_bss_lock);
2258         return bss;
2259 }
2260
2261 static struct ieee80211_sta_bss *
2262 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2263                      u8 *ssid, u8 ssid_len)
2264 {
2265         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2266         struct ieee80211_sta_bss *bss;
2267
2268         spin_lock_bh(&local->sta_bss_lock);
2269         bss = local->sta_bss_hash[STA_HASH(bssid)];
2270         while (bss) {
2271                 if (!bss_mesh_cfg(bss) &&
2272                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2273                     bss->freq == freq &&
2274                     bss->ssid_len == ssid_len &&
2275                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2276                         atomic_inc(&bss->users);
2277                         break;
2278                 }
2279                 bss = bss->hnext;
2280         }
2281         spin_unlock_bh(&local->sta_bss_lock);
2282         return bss;
2283 }
2284
2285 #ifdef CONFIG_MAC80211_MESH
2286 static struct ieee80211_sta_bss *
2287 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2288                           u8 *mesh_cfg, int freq)
2289 {
2290         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2291         struct ieee80211_sta_bss *bss;
2292
2293         spin_lock_bh(&local->sta_bss_lock);
2294         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2295         while (bss) {
2296                 if (bss_mesh_cfg(bss) &&
2297                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2298                     bss->freq == freq &&
2299                     mesh_id_len == bss->mesh_id_len &&
2300                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2301                                                  mesh_id_len))) {
2302                         atomic_inc(&bss->users);
2303                         break;
2304                 }
2305                 bss = bss->hnext;
2306         }
2307         spin_unlock_bh(&local->sta_bss_lock);
2308         return bss;
2309 }
2310
2311 static struct ieee80211_sta_bss *
2312 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2313                           u8 *mesh_cfg, int mesh_config_len, int freq)
2314 {
2315         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2316         struct ieee80211_sta_bss *bss;
2317
2318         if (mesh_config_len != MESH_CFG_LEN)
2319                 return NULL;
2320
2321         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2322         if (!bss)
2323                 return NULL;
2324
2325         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2326         if (!bss->mesh_cfg) {
2327                 kfree(bss);
2328                 return NULL;
2329         }
2330
2331         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2332                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2333                 if (!bss->mesh_id) {
2334                         kfree(bss->mesh_cfg);
2335                         kfree(bss);
2336                         return NULL;
2337                 }
2338                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2339         }
2340
2341         atomic_inc(&bss->users);
2342         atomic_inc(&bss->users);
2343         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2344         bss->mesh_id_len = mesh_id_len;
2345         bss->freq = freq;
2346         spin_lock_bh(&local->sta_bss_lock);
2347         /* TODO: order by RSSI? */
2348         list_add_tail(&bss->list, &local->sta_bss_list);
2349         __ieee80211_rx_bss_hash_add(dev, bss);
2350         spin_unlock_bh(&local->sta_bss_lock);
2351         return bss;
2352 }
2353 #endif
2354
2355 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2356 {
2357         kfree(bss->wpa_ie);
2358         kfree(bss->rsn_ie);
2359         kfree(bss->wmm_ie);
2360         kfree(bss->ht_ie);
2361         kfree(bss->ht_add_ie);
2362         kfree(bss_mesh_id(bss));
2363         kfree(bss_mesh_cfg(bss));
2364         kfree(bss);
2365 }
2366
2367
2368 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2369                                  struct ieee80211_sta_bss *bss)
2370 {
2371         local_bh_disable();
2372         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2373                 local_bh_enable();
2374                 return;
2375         }
2376
2377         __ieee80211_rx_bss_hash_del(local, bss);
2378         list_del(&bss->list);
2379         spin_unlock_bh(&local->sta_bss_lock);
2380         ieee80211_rx_bss_free(bss);
2381 }
2382
2383
2384 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2385 {
2386         spin_lock_init(&local->sta_bss_lock);
2387         INIT_LIST_HEAD(&local->sta_bss_list);
2388 }
2389
2390
2391 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2392 {
2393         struct ieee80211_sta_bss *bss, *tmp;
2394
2395         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2396                 ieee80211_rx_bss_put(local, bss);
2397 }
2398
2399
2400 static int ieee80211_sta_join_ibss(struct net_device *dev,
2401                                    struct ieee80211_if_sta *ifsta,
2402                                    struct ieee80211_sta_bss *bss)
2403 {
2404         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2405         int res, rates, i, j;
2406         struct sk_buff *skb;
2407         struct ieee80211_mgmt *mgmt;
2408         u8 *pos;
2409         struct ieee80211_sub_if_data *sdata;
2410         struct ieee80211_supported_band *sband;
2411         union iwreq_data wrqu;
2412
2413         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2414
2415         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2416
2417         /* Remove possible STA entries from other IBSS networks. */
2418         sta_info_flush_delayed(sdata);
2419
2420         if (local->ops->reset_tsf) {
2421                 /* Reset own TSF to allow time synchronization work. */
2422                 local->ops->reset_tsf(local_to_hw(local));
2423         }
2424         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2425         res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2426         if (res)
2427                 return res;
2428
2429         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2430
2431         sdata->drop_unencrypted = bss->capability &
2432                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2433
2434         res = ieee80211_set_freq(dev, bss->freq);
2435
2436         if (res)
2437                 return res;
2438
2439         /* Build IBSS probe response */
2440         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2441         if (skb) {
2442                 skb_reserve(skb, local->hw.extra_tx_headroom);
2443
2444                 mgmt = (struct ieee80211_mgmt *)
2445                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2446                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2447                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2448                                                    IEEE80211_STYPE_PROBE_RESP);
2449                 memset(mgmt->da, 0xff, ETH_ALEN);
2450                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2451                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2452                 mgmt->u.beacon.beacon_int =
2453                         cpu_to_le16(local->hw.conf.beacon_int);
2454                 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2455                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2456
2457                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2458                 *pos++ = WLAN_EID_SSID;
2459                 *pos++ = ifsta->ssid_len;
2460                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2461
2462                 rates = bss->supp_rates_len;
2463                 if (rates > 8)
2464                         rates = 8;
2465                 pos = skb_put(skb, 2 + rates);
2466                 *pos++ = WLAN_EID_SUPP_RATES;
2467                 *pos++ = rates;
2468                 memcpy(pos, bss->supp_rates, rates);
2469
2470                 if (bss->band == IEEE80211_BAND_2GHZ) {
2471                         pos = skb_put(skb, 2 + 1);
2472                         *pos++ = WLAN_EID_DS_PARAMS;
2473                         *pos++ = 1;
2474                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2475                 }
2476
2477                 pos = skb_put(skb, 2 + 2);
2478                 *pos++ = WLAN_EID_IBSS_PARAMS;
2479                 *pos++ = 2;
2480                 /* FIX: set ATIM window based on scan results */
2481                 *pos++ = 0;
2482                 *pos++ = 0;
2483
2484                 if (bss->supp_rates_len > 8) {
2485                         rates = bss->supp_rates_len - 8;
2486                         pos = skb_put(skb, 2 + rates);
2487                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2488                         *pos++ = rates;
2489                         memcpy(pos, &bss->supp_rates[8], rates);
2490                 }
2491
2492                 ifsta->probe_resp = skb;
2493
2494                 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2495         }
2496
2497         rates = 0;
2498         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2499         for (i = 0; i < bss->supp_rates_len; i++) {
2500                 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2501                 for (j = 0; j < sband->n_bitrates; j++)
2502                         if (sband->bitrates[j].bitrate == bitrate)
2503                                 rates |= BIT(j);
2504         }
2505         ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2506
2507         ieee80211_sta_def_wmm_params(dev, bss, 1);
2508
2509         ifsta->state = IEEE80211_IBSS_JOINED;
2510         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2511
2512         memset(&wrqu, 0, sizeof(wrqu));
2513         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2514         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2515
2516         return res;
2517 }
2518
2519 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2520                             struct ieee802_11_elems *elems,
2521                             enum ieee80211_band band)
2522 {
2523         struct ieee80211_supported_band *sband;
2524         struct ieee80211_rate *bitrates;
2525         size_t num_rates;
2526         u64 supp_rates;
2527         int i, j;
2528         sband = local->hw.wiphy->bands[band];
2529
2530         if (!sband) {
2531                 WARN_ON(1);
2532                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2533         }
2534
2535         bitrates = sband->bitrates;
2536         num_rates = sband->n_bitrates;
2537         supp_rates = 0;
2538         for (i = 0; i < elems->supp_rates_len +
2539                      elems->ext_supp_rates_len; i++) {
2540                 u8 rate = 0;
2541                 int own_rate;
2542                 if (i < elems->supp_rates_len)
2543                         rate = elems->supp_rates[i];
2544                 else if (elems->ext_supp_rates)
2545                         rate = elems->ext_supp_rates
2546                                 [i - elems->supp_rates_len];
2547                 own_rate = 5 * (rate & 0x7f);
2548                 for (j = 0; j < num_rates; j++)
2549                         if (bitrates[j].bitrate == own_rate)
2550                                 supp_rates |= BIT(j);
2551         }
2552         return supp_rates;
2553 }
2554
2555
2556 static void ieee80211_rx_bss_info(struct net_device *dev,
2557                                   struct ieee80211_mgmt *mgmt,
2558                                   size_t len,
2559                                   struct ieee80211_rx_status *rx_status,
2560                                   struct ieee802_11_elems *elems,
2561                                   int beacon)
2562 {
2563         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2564         int freq, clen;
2565         struct ieee80211_sta_bss *bss;
2566         struct sta_info *sta;
2567         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2568         u64 beacon_timestamp, rx_timestamp;
2569         struct ieee80211_channel *channel;
2570         DECLARE_MAC_BUF(mac);
2571         DECLARE_MAC_BUF(mac2);
2572
2573         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2574                 return; /* ignore ProbeResp to foreign address */
2575
2576         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2577
2578         if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2579             elems->mesh_config && mesh_matches_local(elems, dev)) {
2580                 u64 rates = ieee80211_sta_get_rates(local, elems,
2581                                                 rx_status->band);
2582
2583                 mesh_neighbour_update(mgmt->sa, rates, dev,
2584                                       mesh_peer_accepts_plinks(elems, dev));
2585         }
2586
2587         rcu_read_lock();
2588
2589         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2590             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2591             (sta = sta_info_get(local, mgmt->sa))) {
2592                 u64 prev_rates;
2593                 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2594                                                         rx_status->band);
2595
2596                 prev_rates = sta->supp_rates[rx_status->band];
2597                 sta->supp_rates[rx_status->band] &= supp_rates;
2598                 if (sta->supp_rates[rx_status->band] == 0) {
2599                         /* No matching rates - this should not really happen.
2600                          * Make sure that at least one rate is marked
2601                          * supported to avoid issues with TX rate ctrl. */
2602                         sta->supp_rates[rx_status->band] =
2603                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2604                 }
2605         }
2606
2607         rcu_read_unlock();
2608
2609         if (elems->ds_params && elems->ds_params_len == 1)
2610                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2611         else
2612                 freq = rx_status->freq;
2613
2614         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2615
2616         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2617                 return;
2618
2619 #ifdef CONFIG_MAC80211_MESH
2620         if (elems->mesh_config)
2621                 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2622                                 elems->mesh_id_len, elems->mesh_config, freq);
2623         else
2624 #endif
2625                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2626                                            elems->ssid, elems->ssid_len);
2627         if (!bss) {
2628 #ifdef CONFIG_MAC80211_MESH
2629                 if (elems->mesh_config)
2630                         bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2631                                 elems->mesh_id_len, elems->mesh_config,
2632                                 elems->mesh_config_len, freq);
2633                 else
2634 #endif
2635                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2636                                                   elems->ssid, elems->ssid_len);
2637                 if (!bss)
2638                         return;
2639         } else {
2640 #if 0
2641                 /* TODO: order by RSSI? */
2642                 spin_lock_bh(&local->sta_bss_lock);
2643                 list_move_tail(&bss->list, &local->sta_bss_list);
2644                 spin_unlock_bh(&local->sta_bss_lock);
2645 #endif
2646         }
2647
2648         /* save the ERP value so that it is available at association time */
2649         if (elems->erp_info && elems->erp_info_len >= 1) {
2650                 bss->erp_value = elems->erp_info[0];
2651                 bss->has_erp_value = 1;
2652         }
2653
2654         if (elems->ht_cap_elem &&
2655              (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2656              memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2657                 kfree(bss->ht_ie);
2658                 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2659                 if (bss->ht_ie) {
2660                         memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2661                                 elems->ht_cap_elem_len + 2);
2662                         bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2663                 } else
2664                         bss->ht_ie_len = 0;
2665         } else if (!elems->ht_cap_elem && bss->ht_ie) {
2666                 kfree(bss->ht_ie);
2667                 bss->ht_ie = NULL;
2668                 bss->ht_ie_len = 0;
2669         }
2670
2671         if (elems->ht_info_elem &&
2672              (!bss->ht_add_ie ||
2673              bss->ht_add_ie_len != elems->ht_info_elem_len ||
2674              memcmp(bss->ht_add_ie, elems->ht_info_elem,
2675                         elems->ht_info_elem_len))) {
2676                 kfree(bss->ht_add_ie);
2677                 bss->ht_add_ie =
2678                         kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2679                 if (bss->ht_add_ie) {
2680                         memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2681                                 elems->ht_info_elem_len + 2);
2682                         bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2683                 } else
2684                         bss->ht_add_ie_len = 0;
2685         } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2686                 kfree(bss->ht_add_ie);
2687                 bss->ht_add_ie = NULL;
2688                 bss->ht_add_ie_len = 0;
2689         }
2690
2691         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2692         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2693
2694         if (elems->tim) {
2695                 struct ieee80211_tim_ie *tim_ie =
2696                         (struct ieee80211_tim_ie *)elems->tim;
2697                 bss->dtim_period = tim_ie->dtim_period;
2698         }
2699
2700         /* set default value for buggy APs */
2701         if (!elems->tim || bss->dtim_period == 0)
2702                 bss->dtim_period = 1;
2703
2704         bss->supp_rates_len = 0;
2705         if (elems->supp_rates) {
2706                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2707                 if (clen > elems->supp_rates_len)
2708                         clen = elems->supp_rates_len;
2709                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2710                        clen);
2711                 bss->supp_rates_len += clen;
2712         }
2713         if (elems->ext_supp_rates) {
2714                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2715                 if (clen > elems->ext_supp_rates_len)
2716                         clen = elems->ext_supp_rates_len;
2717                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2718                        elems->ext_supp_rates, clen);
2719                 bss->supp_rates_len += clen;
2720         }
2721
2722         bss->band = rx_status->band;
2723
2724         bss->timestamp = beacon_timestamp;
2725         bss->last_update = jiffies;
2726         bss->signal = rx_status->signal;
2727         bss->noise = rx_status->noise;
2728         bss->qual = rx_status->qual;
2729         if (!beacon && !bss->probe_resp)
2730                 bss->probe_resp = true;
2731
2732         /*
2733          * In STA mode, the remaining parameters should not be overridden
2734          * by beacons because they're not necessarily accurate there.
2735          */
2736         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2737             bss->probe_resp && beacon) {
2738                 ieee80211_rx_bss_put(local, bss);
2739                 return;
2740         }
2741
2742         if (elems->wpa &&
2743             (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2744              memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2745                 kfree(bss->wpa_ie);
2746                 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2747                 if (bss->wpa_ie) {
2748                         memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2749                         bss->wpa_ie_len = elems->wpa_len + 2;
2750                 } else
2751                         bss->wpa_ie_len = 0;
2752         } else if (!elems->wpa && bss->wpa_ie) {
2753                 kfree(bss->wpa_ie);
2754                 bss->wpa_ie = NULL;
2755                 bss->wpa_ie_len = 0;
2756         }
2757
2758         if (elems->rsn &&
2759             (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2760              memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2761                 kfree(bss->rsn_ie);
2762                 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2763                 if (bss->rsn_ie) {
2764                         memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2765                         bss->rsn_ie_len = elems->rsn_len + 2;
2766                 } else
2767                         bss->rsn_ie_len = 0;
2768         } else if (!elems->rsn && bss->rsn_ie) {
2769                 kfree(bss->rsn_ie);
2770                 bss->rsn_ie = NULL;
2771                 bss->rsn_ie_len = 0;
2772         }
2773
2774         /*
2775          * Cf.
2776          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2777          *
2778          * quoting:
2779          *
2780          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2781          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2782          * Alliance (September 1, 2004) is incorporated by reference herein.
2783          * The inclusion of the WMM Parameters in probe responses and
2784          * association responses is mandatory for WMM enabled networks. The
2785          * inclusion of the WMM Parameters in beacons, however, is optional.
2786          */
2787
2788         if (elems->wmm_param &&
2789             (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2790              memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2791                 kfree(bss->wmm_ie);
2792                 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2793                 if (bss->wmm_ie) {
2794                         memcpy(bss->wmm_ie, elems->wmm_param - 2,
2795                                elems->wmm_param_len + 2);
2796                         bss->wmm_ie_len = elems->wmm_param_len + 2;
2797                 } else
2798                         bss->wmm_ie_len = 0;
2799         } else if (elems->wmm_info &&
2800                     (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2801                      memcmp(bss->wmm_ie, elems->wmm_info,
2802                                                 elems->wmm_info_len))) {
2803                  /* As for certain AP's Fifth bit is not set in WMM IE in
2804                   * beacon frames.So while parsing the beacon frame the
2805                   * wmm_info structure is used instead of wmm_param.
2806                   * wmm_info structure was never used to set bss->wmm_ie.
2807                   * This code fixes this problem by copying the WME
2808                   * information from wmm_info to bss->wmm_ie and enabling
2809                   * n-band association.
2810                   */
2811                 kfree(bss->wmm_ie);
2812                 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2813                 if (bss->wmm_ie) {
2814                         memcpy(bss->wmm_ie, elems->wmm_info - 2,
2815                                elems->wmm_info_len + 2);
2816                         bss->wmm_ie_len = elems->wmm_info_len + 2;
2817                 } else
2818                         bss->wmm_ie_len = 0;
2819         } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2820                 kfree(bss->wmm_ie);
2821                 bss->wmm_ie = NULL;
2822                 bss->wmm_ie_len = 0;
2823         }
2824
2825         /* check if we need to merge IBSS */
2826         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2827             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2828             bss->capability & WLAN_CAPABILITY_IBSS &&
2829             bss->freq == local->oper_channel->center_freq &&
2830             elems->ssid_len == sdata->u.sta.ssid_len &&
2831             memcmp(elems->ssid, sdata->u.sta.ssid,
2832                                 sdata->u.sta.ssid_len) == 0) {
2833                 if (rx_status->flag & RX_FLAG_TSFT) {
2834                         /* in order for correct IBSS merging we need mactime
2835                          *
2836                          * since mactime is defined as the time the first data
2837                          * symbol of the frame hits the PHY, and the timestamp
2838                          * of the beacon is defined as "the time that the data
2839                          * symbol containing the first bit of the timestamp is
2840                          * transmitted to the PHY plus the transmitting STA’s
2841                          * delays through its local PHY from the MAC-PHY
2842                          * interface to its interface with the WM"
2843                          * (802.11 11.1.2) - equals the time this bit arrives at
2844                          * the receiver - we have to take into account the
2845                          * offset between the two.
2846                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2847                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2848                          */
2849                         int rate = local->hw.wiphy->bands[rx_status->band]->
2850                                         bitrates[rx_status->rate_idx].bitrate;
2851                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2852                 } else if (local && local->ops && local->ops->get_tsf)
2853                         /* second best option: get current TSF */
2854                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2855                 else
2856                         /* can't merge without knowing the TSF */
2857                         rx_timestamp = -1LLU;
2858 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2859                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2860                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2861                        print_mac(mac, mgmt->sa),
2862                        print_mac(mac2, mgmt->bssid),
2863                        (unsigned long long)rx_timestamp,
2864                        (unsigned long long)beacon_timestamp,
2865                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2866                        jiffies);
2867 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2868                 if (beacon_timestamp > rx_timestamp) {
2869 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2870                         printk(KERN_DEBUG "%s: beacon TSF higher than "
2871                                "local TSF - IBSS merge with BSSID %s\n",
2872                                dev->name, print_mac(mac, mgmt->bssid));
2873 #endif
2874                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2875                         ieee80211_ibss_add_sta(dev, NULL,
2876                                                mgmt->bssid, mgmt->sa,
2877                                                BIT(rx_status->rate_idx));
2878                 }
2879         }
2880
2881         ieee80211_rx_bss_put(local, bss);
2882 }
2883
2884
2885 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2886                                          struct ieee80211_mgmt *mgmt,
2887                                          size_t len,
2888                                          struct ieee80211_rx_status *rx_status)
2889 {
2890         size_t baselen;
2891         struct ieee802_11_elems elems;
2892
2893         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2894         if (baselen > len)
2895                 return;
2896
2897         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2898                                 &elems);
2899
2900         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
2901 }
2902
2903
2904 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2905                                      struct ieee80211_mgmt *mgmt,
2906                                      size_t len,
2907                                      struct ieee80211_rx_status *rx_status)
2908 {
2909         struct ieee80211_sub_if_data *sdata;
2910         struct ieee80211_if_sta *ifsta;
2911         size_t baselen;
2912         struct ieee802_11_elems elems;
2913         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2914         struct ieee80211_conf *conf = &local->hw.conf;
2915         u32 changed = 0;
2916
2917         /* Process beacon from the current BSS */
2918         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2919         if (baselen > len)
2920                 return;
2921
2922         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2923
2924         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
2925
2926         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2927         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2928                 return;
2929         ifsta = &sdata->u.sta;
2930
2931         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2932             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2933                 return;
2934
2935         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2936                                  elems.wmm_param_len);
2937
2938         /* Do not send changes to driver if we are scanning. This removes
2939          * requirement that driver's bss_info_changed function needs to be
2940          * atomic. */
2941         if (local->sta_sw_scanning || local->sta_hw_scanning)
2942                 return;
2943
2944         if (elems.erp_info && elems.erp_info_len >= 1)
2945                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2946         else {
2947                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2948                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2949                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2950         }
2951
2952         if (elems.ht_cap_elem && elems.ht_info_elem &&
2953             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2954                 struct ieee80211_ht_bss_info bss_info;
2955
2956                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2957                                 (struct ieee80211_ht_addt_info *)
2958                                 elems.ht_info_elem, &bss_info);
2959                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2960                                                &bss_info);
2961         }
2962
2963         ieee80211_bss_info_change_notify(sdata, changed);
2964 }
2965
2966
2967 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2968                                         struct ieee80211_if_sta *ifsta,
2969                                         struct ieee80211_mgmt *mgmt,
2970                                         size_t len,
2971                                         struct ieee80211_rx_status *rx_status)
2972 {
2973         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2974         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2975         int tx_last_beacon;
2976         struct sk_buff *skb;
2977         struct ieee80211_mgmt *resp;
2978         u8 *pos, *end;
2979         DECLARE_MAC_BUF(mac);
2980 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2981         DECLARE_MAC_BUF(mac2);
2982         DECLARE_MAC_BUF(mac3);
2983 #endif
2984
2985         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2986             ifsta->state != IEEE80211_IBSS_JOINED ||
2987             len < 24 + 2 || !ifsta->probe_resp)
2988                 return;
2989
2990         if (local->ops->tx_last_beacon)
2991                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2992         else
2993                 tx_last_beacon = 1;
2994
2995 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2996         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2997                "%s (tx_last_beacon=%d)\n",
2998                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2999                print_mac(mac3, mgmt->bssid), tx_last_beacon);
3000 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3001
3002         if (!tx_last_beacon)
3003                 return;
3004
3005         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3006             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3007                 return;
3008
3009         end = ((u8 *) mgmt) + len;
3010         pos = mgmt->u.probe_req.variable;
3011         if (pos[0] != WLAN_EID_SSID ||
3012             pos + 2 + pos[1] > end) {
3013 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3014                 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3015                        "from %s\n",
3016                        dev->name, print_mac(mac, mgmt->sa));
3017 #endif
3018                 return;
3019         }
3020         if (pos[1] != 0 &&
3021             (pos[1] != ifsta->ssid_len ||
3022              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3023                 /* Ignore ProbeReq for foreign SSID */
3024                 return;
3025         }
3026
3027         /* Reply with ProbeResp */
3028         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3029         if (!skb)
3030                 return;
3031
3032         resp = (struct ieee80211_mgmt *) skb->data;
3033         memcpy(resp->da, mgmt->sa, ETH_ALEN);
3034 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3035         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3036                dev->name, print_mac(mac, resp->da));
3037 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3038         ieee80211_sta_tx(dev, skb, 0);
3039 }
3040
3041 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3042                                      struct ieee80211_if_sta *ifsta,
3043                                      struct ieee80211_mgmt *mgmt,
3044                                      size_t len,
3045                                      struct ieee80211_rx_status *rx_status)
3046 {
3047         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3048         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3049
3050         if (len < IEEE80211_MIN_ACTION_SIZE)
3051                 return;
3052
3053         switch (mgmt->u.action.category) {
3054         case WLAN_CATEGORY_SPECTRUM_MGMT:
3055                 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3056                         break;
3057                 switch (mgmt->u.action.u.chan_switch.action_code) {
3058                 case WLAN_ACTION_SPCT_MSR_REQ:
3059                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3060                                    sizeof(mgmt->u.action.u.measurement)))
3061                                 break;
3062                         ieee80211_sta_process_measurement_req(dev, mgmt, len);
3063                         break;
3064                 }
3065                 break;
3066         case WLAN_CATEGORY_BACK:
3067                 switch (mgmt->u.action.u.addba_req.action_code) {
3068                 case WLAN_ACTION_ADDBA_REQ:
3069                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3070                                    sizeof(mgmt->u.action.u.addba_req)))
3071                                 break;
3072                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3073                         break;
3074                 case WLAN_ACTION_ADDBA_RESP:
3075                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3076                                    sizeof(mgmt->u.action.u.addba_resp)))
3077                                 break;
3078                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3079                         break;
3080                 case WLAN_ACTION_DELBA:
3081                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3082                                    sizeof(mgmt->u.action.u.delba)))
3083                                 break;
3084                         ieee80211_sta_process_delba(dev, mgmt, len);
3085                         break;
3086                 }
3087                 break;
3088         case PLINK_CATEGORY:
3089                 if (ieee80211_vif_is_mesh(&sdata->vif))
3090                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3091                 break;
3092         case MESH_PATH_SEL_CATEGORY:
3093                 if (ieee80211_vif_is_mesh(&sdata->vif))
3094                         mesh_rx_path_sel_frame(dev, mgmt, len);
3095                 break;
3096         }
3097 }
3098
3099 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3100                            struct ieee80211_rx_status *rx_status)
3101 {
3102         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3103         struct ieee80211_sub_if_data *sdata;
3104         struct ieee80211_if_sta *ifsta;
3105         struct ieee80211_mgmt *mgmt;
3106         u16 fc;
3107
3108         if (skb->len < 24)
3109                 goto fail;
3110
3111         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3112         ifsta = &sdata->u.sta;
3113
3114         mgmt = (struct ieee80211_mgmt *) skb->data;
3115         fc = le16_to_cpu(mgmt->frame_control);
3116
3117         switch (fc & IEEE80211_FCTL_STYPE) {
3118         case IEEE80211_STYPE_PROBE_REQ:
3119         case IEEE80211_STYPE_PROBE_RESP:
3120         case IEEE80211_STYPE_BEACON:
3121         case IEEE80211_STYPE_ACTION:
3122                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3123         case IEEE80211_STYPE_AUTH:
3124         case IEEE80211_STYPE_ASSOC_RESP:
3125         case IEEE80211_STYPE_REASSOC_RESP:
3126         case IEEE80211_STYPE_DEAUTH:
3127         case IEEE80211_STYPE_DISASSOC:
3128                 skb_queue_tail(&ifsta->skb_queue, skb);
3129                 queue_work(local->hw.workqueue, &ifsta->work);
3130                 return;
3131         }
3132
3133  fail:
3134         kfree_skb(skb);
3135 }
3136
3137
3138 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3139                                          struct sk_buff *skb)
3140 {
3141         struct ieee80211_rx_status *rx_status;
3142         struct ieee80211_sub_if_data *sdata;
3143         struct ieee80211_if_sta *ifsta;
3144         struct ieee80211_mgmt *mgmt;
3145         u16 fc;
3146
3147         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3148         ifsta = &sdata->u.sta;
3149
3150         rx_status = (struct ieee80211_rx_status *) skb->cb;
3151         mgmt = (struct ieee80211_mgmt *) skb->data;
3152         fc = le16_to_cpu(mgmt->frame_control);
3153
3154         switch (fc & IEEE80211_FCTL_STYPE) {
3155         case IEEE80211_STYPE_PROBE_REQ:
3156                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3157                                             rx_status);
3158                 break;
3159         case IEEE80211_STYPE_PROBE_RESP:
3160                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3161                 break;
3162         case IEEE80211_STYPE_BEACON:
3163                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3164                 break;
3165         case IEEE80211_STYPE_AUTH:
3166                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3167                 break;
3168         case IEEE80211_STYPE_ASSOC_RESP:
3169                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3170                 break;
3171         case IEEE80211_STYPE_REASSOC_RESP:
3172                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3173                 break;
3174         case IEEE80211_STYPE_DEAUTH:
3175                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3176                 break;
3177         case IEEE80211_STYPE_DISASSOC:
3178                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3179                 break;
3180         case IEEE80211_STYPE_ACTION:
3181                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3182                 break;
3183         }
3184
3185         kfree_skb(skb);
3186 }
3187
3188
3189 ieee80211_rx_result
3190 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3191                       struct ieee80211_rx_status *rx_status)
3192 {
3193         struct ieee80211_mgmt *mgmt;
3194         __le16 fc;
3195
3196         if (skb->len < 2)
3197                 return RX_DROP_UNUSABLE;
3198
3199         mgmt = (struct ieee80211_mgmt *) skb->data;
3200         fc = mgmt->frame_control;
3201
3202         if (ieee80211_is_ctl(fc))
3203                 return RX_CONTINUE;
3204
3205         if (skb->len < 24)
3206                 return RX_DROP_MONITOR;
3207
3208         if (ieee80211_is_probe_resp(fc)) {
3209                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3210                 dev_kfree_skb(skb);
3211                 return RX_QUEUED;
3212         }
3213
3214         if (ieee80211_is_beacon(fc)) {
3215                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3216                 dev_kfree_skb(skb);
3217                 return RX_QUEUED;
3218         }
3219
3220         return RX_CONTINUE;
3221 }
3222
3223
3224 static int ieee80211_sta_active_ibss(struct net_device *dev)
3225 {
3226         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3227         int active = 0;
3228         struct sta_info *sta;
3229         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3230
3231         rcu_read_lock();
3232
3233         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3234                 if (sta->sdata == sdata &&
3235                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3236                                jiffies)) {
3237                         active++;
3238                         break;
3239                 }
3240         }
3241
3242         rcu_read_unlock();
3243
3244         return active;
3245 }
3246
3247
3248 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3249 {
3250         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3251         struct sta_info *sta, *tmp;
3252         LIST_HEAD(tmp_list);
3253         DECLARE_MAC_BUF(mac);
3254         unsigned long flags;
3255
3256         spin_lock_irqsave(&local->sta_lock, flags);
3257         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3258                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3259 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3260                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3261                                dev->name, print_mac(mac, sta->addr));
3262 #endif
3263                         __sta_info_unlink(&sta);
3264                         if (sta)
3265                                 list_add(&sta->list, &tmp_list);
3266                 }
3267         spin_unlock_irqrestore(&local->sta_lock, flags);
3268
3269         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3270                 sta_info_destroy(sta);
3271 }
3272
3273
3274 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3275                                      struct ieee80211_if_sta *ifsta)
3276 {
3277         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3278
3279         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3280         if (ieee80211_sta_active_ibss(dev))
3281                 return;
3282
3283         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3284                "IBSS networks with same SSID (merge)\n", dev->name);
3285         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3286 }
3287
3288
3289 #ifdef CONFIG_MAC80211_MESH
3290 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3291                            struct ieee80211_if_sta *ifsta)
3292 {
3293         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3294         bool free_plinks;
3295
3296         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3297         mesh_path_expire(dev);
3298
3299         free_plinks = mesh_plink_availables(sdata);
3300         if (free_plinks != sdata->u.sta.accepting_plinks)
3301                 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3302
3303         mod_timer(&ifsta->timer, jiffies +
3304                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3305 }
3306
3307
3308 void ieee80211_start_mesh(struct net_device *dev)
3309 {
3310         struct ieee80211_if_sta *ifsta;
3311         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3312         ifsta = &sdata->u.sta;
3313         ifsta->state = IEEE80211_MESH_UP;
3314         ieee80211_sta_timer((unsigned long)sdata);
3315         ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3316 }
3317 #endif
3318
3319
3320 void ieee80211_sta_timer(unsigned long data)
3321 {
3322         struct ieee80211_sub_if_data *sdata =
3323                 (struct ieee80211_sub_if_data *) data;
3324         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3325         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3326
3327         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3328         queue_work(local->hw.workqueue, &ifsta->work);
3329 }
3330
3331 void ieee80211_sta_work(struct work_struct *work)
3332 {
3333         struct ieee80211_sub_if_data *sdata =
3334                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3335         struct net_device *dev = sdata->dev;
3336         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3337         struct ieee80211_if_sta *ifsta;
3338         struct sk_buff *skb;
3339
3340         if (!netif_running(dev))
3341                 return;
3342
3343         if (local->sta_sw_scanning || local->sta_hw_scanning)
3344                 return;
3345
3346         if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3347                     sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3348                     sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3349                 return;
3350         ifsta = &sdata->u.sta;
3351
3352         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3353                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3354
3355 #ifdef CONFIG_MAC80211_MESH
3356         if (ifsta->preq_queue_len &&
3357             time_after(jiffies,
3358                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3359                 mesh_path_start_discovery(dev);
3360 #endif
3361
3362         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3363             ifsta->state != IEEE80211_ASSOCIATE &&
3364             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3365                 if (ifsta->scan_ssid_len)
3366                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3367                 else
3368                         ieee80211_sta_start_scan(dev, NULL, 0);
3369                 return;
3370         }
3371
3372         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3373                 if (ieee80211_sta_config_auth(dev, ifsta))
3374                         return;
3375                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3376         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3377                 return;
3378
3379         switch (ifsta->state) {
3380         case IEEE80211_DISABLED:
3381                 break;
3382         case IEEE80211_AUTHENTICATE:
3383                 ieee80211_authenticate(dev, ifsta);
3384                 break;
3385         case IEEE80211_ASSOCIATE:
3386                 ieee80211_associate(dev, ifsta);
3387                 break;
3388         case IEEE80211_ASSOCIATED:
3389                 ieee80211_associated(dev, ifsta);
3390                 break;
3391         case IEEE80211_IBSS_SEARCH:
3392                 ieee80211_sta_find_ibss(dev, ifsta);
3393                 break;
3394         case IEEE80211_IBSS_JOINED:
3395                 ieee80211_sta_merge_ibss(dev, ifsta);
3396                 break;
3397 #ifdef CONFIG_MAC80211_MESH
3398         case IEEE80211_MESH_UP:
3399                 ieee80211_mesh_housekeeping(dev, ifsta);
3400                 break;
3401 #endif
3402         default:
3403                 WARN_ON(1);
3404                 break;
3405         }
3406
3407         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3408                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3409                        "mixed-cell disabled - disassociate\n", dev->name);
3410
3411                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3412                 ieee80211_set_disassoc(dev, ifsta, 0);
3413         }
3414 }
3415
3416
3417 static void ieee80211_sta_reset_auth(struct net_device *dev,
3418                                      struct ieee80211_if_sta *ifsta)
3419 {
3420         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3421
3422         if (local->ops->reset_tsf) {
3423                 /* Reset own TSF to allow time synchronization work. */
3424                 local->ops->reset_tsf(local_to_hw(local));
3425         }
3426
3427         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3428
3429
3430         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3431                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3432         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3433                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3434         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3435                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3436         else
3437                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3438         ifsta->auth_transaction = -1;
3439         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3440         ifsta->auth_tries = ifsta->assoc_tries = 0;
3441         netif_carrier_off(dev);
3442 }
3443
3444
3445 void ieee80211_sta_req_auth(struct net_device *dev,
3446                             struct ieee80211_if_sta *ifsta)
3447 {
3448         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3449         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3450
3451         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3452                 return;
3453
3454         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3455                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3456             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3457                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3458                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3459                 queue_work(local->hw.workqueue, &ifsta->work);
3460         }
3461 }
3462
3463 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3464                                     const char *ssid, int ssid_len)
3465 {
3466         int tmp, hidden_ssid;
3467
3468         if (ssid_len == ifsta->ssid_len &&
3469             !memcmp(ifsta->ssid, ssid, ssid_len))
3470                 return 1;
3471
3472         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3473                 return 0;
3474
3475         hidden_ssid = 1;
3476         tmp = ssid_len;
3477         while (tmp--) {
3478                 if (ssid[tmp] != '\0') {
3479                         hidden_ssid = 0;
3480                         break;
3481                 }
3482         }
3483
3484         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3485                 return 1;
3486
3487         if (ssid_len == 1 && ssid[0] == ' ')
3488                 return 1;
3489
3490         return 0;
3491 }
3492
3493 static int ieee80211_sta_config_auth(struct net_device *dev,
3494                                      struct ieee80211_if_sta *ifsta)
3495 {
3496         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3497         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3498         struct ieee80211_sta_bss *bss, *selected = NULL;
3499         int top_rssi = 0, freq;
3500
3501         spin_lock_bh(&local->sta_bss_lock);
3502         freq = local->oper_channel->center_freq;
3503         list_for_each_entry(bss, &local->sta_bss_list, list) {
3504                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3505                         continue;
3506
3507                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3508                         IEEE80211_STA_AUTO_BSSID_SEL |
3509                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3510                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3511                      !!sdata->default_key))
3512                         continue;
3513
3514                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3515                     bss->freq != freq)
3516                         continue;
3517
3518                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3519                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3520                         continue;
3521
3522                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3523                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3524                         continue;
3525
3526                 if (!selected || top_rssi < bss->signal) {
3527                         selected = bss;
3528                         top_rssi = bss->signal;
3529                 }
3530         }
3531         if (selected)
3532                 atomic_inc(&selected->users);
3533         spin_unlock_bh(&local->sta_bss_lock);
3534
3535         if (selected) {
3536                 ieee80211_set_freq(dev, selected->freq);
3537                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3538                         ieee80211_sta_set_ssid(dev, selected->ssid,
3539                                                selected->ssid_len);
3540                 ieee80211_sta_set_bssid(dev, selected->bssid);
3541                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3542                 ieee80211_rx_bss_put(local, selected);
3543                 ifsta->state = IEEE80211_AUTHENTICATE;
3544                 ieee80211_sta_reset_auth(dev, ifsta);
3545                 return 0;
3546         } else {
3547                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3548                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3549                                 ieee80211_sta_start_scan(dev, NULL, 0);
3550                         else
3551                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3552                                                          ifsta->ssid_len);
3553                         ifsta->state = IEEE80211_AUTHENTICATE;
3554                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3555                 } else
3556                         ifsta->state = IEEE80211_DISABLED;
3557         }
3558         return -1;
3559 }
3560
3561
3562 static int ieee80211_sta_create_ibss(struct net_device *dev,
3563                                      struct ieee80211_if_sta *ifsta)
3564 {
3565         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3566         struct ieee80211_sta_bss *bss;
3567         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3568         struct ieee80211_supported_band *sband;
3569         u8 bssid[ETH_ALEN], *pos;
3570         int i;
3571         int ret;
3572         DECLARE_MAC_BUF(mac);
3573
3574 #if 0
3575         /* Easier testing, use fixed BSSID. */
3576         memset(bssid, 0xfe, ETH_ALEN);
3577 #else
3578         /* Generate random, not broadcast, locally administered BSSID. Mix in
3579          * own MAC address to make sure that devices that do not have proper
3580          * random number generator get different BSSID. */
3581         get_random_bytes(bssid, ETH_ALEN);
3582         for (i = 0; i < ETH_ALEN; i++)
3583                 bssid[i] ^= dev->dev_addr[i];
3584         bssid[0] &= ~0x01;
3585         bssid[0] |= 0x02;
3586 #endif
3587
3588         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3589                dev->name, print_mac(mac, bssid));
3590
3591         bss = ieee80211_rx_bss_add(dev, bssid,
3592                                    local->hw.conf.channel->center_freq,
3593                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3594         if (!bss)
3595                 return -ENOMEM;
3596
3597         bss->band = local->hw.conf.channel->band;
3598         sband = local->hw.wiphy->bands[bss->band];
3599
3600         if (local->hw.conf.beacon_int == 0)
3601                 local->hw.conf.beacon_int = 100;
3602         bss->beacon_int = local->hw.conf.beacon_int;
3603         bss->last_update = jiffies;
3604         bss->capability = WLAN_CAPABILITY_IBSS;
3605
3606         if (sdata->default_key)
3607                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3608         else
3609                 sdata->drop_unencrypted = 0;
3610
3611         bss->supp_rates_len = sband->n_bitrates;
3612         pos = bss->supp_rates;
3613         for (i = 0; i < sband->n_bitrates; i++) {
3614                 int rate = sband->bitrates[i].bitrate;
3615                 *pos++ = (u8) (rate / 5);
3616         }
3617
3618         ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3619         ieee80211_rx_bss_put(local, bss);
3620         return ret;
3621 }
3622
3623
3624 static int ieee80211_sta_find_ibss(struct net_device *dev,
3625                                    struct ieee80211_if_sta *ifsta)
3626 {
3627         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3628         struct ieee80211_sta_bss *bss;
3629         int found = 0;
3630         u8 bssid[ETH_ALEN];
3631         int active_ibss;
3632         DECLARE_MAC_BUF(mac);
3633         DECLARE_MAC_BUF(mac2);
3634
3635         if (ifsta->ssid_len == 0)
3636                 return -EINVAL;
3637
3638         active_ibss = ieee80211_sta_active_ibss(dev);
3639 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3640         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3641                dev->name, active_ibss);
3642 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3643         spin_lock_bh(&local->sta_bss_lock);
3644         list_for_each_entry(bss, &local->sta_bss_list, list) {
3645                 if (ifsta->ssid_len != bss->ssid_len ||
3646                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3647                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3648                         continue;
3649 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3650                 printk(KERN_DEBUG "   bssid=%s found\n",
3651                        print_mac(mac, bss->bssid));
3652 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3653                 memcpy(bssid, bss->bssid, ETH_ALEN);
3654                 found = 1;
3655                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3656                         break;
3657         }
3658         spin_unlock_bh(&local->sta_bss_lock);
3659
3660 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3661         if (found)
3662                 printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3663                        "%s\n", print_mac(mac, bssid),
3664                        print_mac(mac2, ifsta->bssid));
3665 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3666
3667         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3668                 int ret;
3669                 int search_freq;
3670
3671                 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3672                         search_freq = bss->freq;
3673                 else
3674                         search_freq = local->hw.conf.channel->center_freq;
3675
3676                 bss = ieee80211_rx_bss_get(dev, bssid, search_freq,
3677                                            ifsta->ssid, ifsta->ssid_len);
3678                 if (!bss)
3679                         goto dont_join;
3680
3681                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3682                        " based on configured SSID\n",
3683                        dev->name, print_mac(mac, bssid));
3684                 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3685                 ieee80211_rx_bss_put(local, bss);
3686                 return ret;
3687         }
3688
3689 dont_join:
3690 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3691         printk(KERN_DEBUG "   did not try to join ibss\n");
3692 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3693
3694         /* Selected IBSS not found in current scan results - try to scan */
3695         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3696             !ieee80211_sta_active_ibss(dev)) {
3697                 mod_timer(&ifsta->timer, jiffies +
3698                                       IEEE80211_IBSS_MERGE_INTERVAL);
3699         } else if (time_after(jiffies, local->last_scan_completed +
3700                               IEEE80211_SCAN_INTERVAL)) {
3701                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3702                        "join\n", dev->name);
3703                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3704                                               ifsta->ssid_len);
3705         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3706                 int interval = IEEE80211_SCAN_INTERVAL;
3707
3708                 if (time_after(jiffies, ifsta->ibss_join_req +
3709                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3710                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3711                             (!(local->oper_channel->flags &
3712                                         IEEE80211_CHAN_NO_IBSS)))
3713                                 return ieee80211_sta_create_ibss(dev, ifsta);
3714                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3715                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3716                                        " %d MHz\n", dev->name,
3717                                        local->hw.conf.channel->center_freq);
3718                         }
3719
3720                         /* No IBSS found - decrease scan interval and continue
3721                          * scanning. */
3722                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3723                 }
3724
3725                 ifsta->state = IEEE80211_IBSS_SEARCH;
3726                 mod_timer(&ifsta->timer, jiffies + interval);
3727                 return 0;
3728         }
3729
3730         return 0;
3731 }
3732
3733
3734 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3735 {
3736         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3737         struct ieee80211_if_sta *ifsta;
3738         int res;
3739
3740         if (len > IEEE80211_MAX_SSID_LEN)
3741                 return -EINVAL;
3742
3743         ifsta = &sdata->u.sta;
3744
3745         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3746                 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3747                 memcpy(ifsta->ssid, ssid, len);
3748                 ifsta->ssid_len = len;
3749                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3750
3751                 res = 0;
3752                 /*
3753                  * Hack! MLME code needs to be cleaned up to have different
3754                  * entry points for configuration and internal selection change
3755                  */
3756                 if (netif_running(sdata->dev))
3757                         res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3758                 if (res) {
3759                         printk(KERN_DEBUG "%s: Failed to config new SSID to "
3760                                "the low-level driver\n", dev->name);
3761                         return res;
3762                 }
3763         }
3764
3765         if (len)
3766                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3767         else
3768                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3769
3770         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3771             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3772                 ifsta->ibss_join_req = jiffies;
3773                 ifsta->state = IEEE80211_IBSS_SEARCH;
3774                 return ieee80211_sta_find_ibss(dev, ifsta);
3775         }
3776
3777         return 0;
3778 }
3779
3780
3781 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3782 {
3783         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3784         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3785         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3786         *len = ifsta->ssid_len;
3787         return 0;
3788 }
3789
3790
3791 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3792 {
3793         struct ieee80211_sub_if_data *sdata;
3794         struct ieee80211_if_sta *ifsta;
3795         int res;
3796
3797         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3798         ifsta = &sdata->u.sta;
3799
3800         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3801                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3802                 res = 0;
3803                 /*
3804                  * Hack! See also ieee80211_sta_set_ssid.
3805                  */
3806                 if (netif_running(sdata->dev))
3807                         res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3808                 if (res) {
3809                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3810                                "the low-level driver\n", dev->name);
3811                         return res;
3812                 }
3813         }
3814
3815         if (is_valid_ether_addr(bssid))
3816                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3817         else
3818                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3819
3820         return 0;
3821 }
3822
3823
3824 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3825                                     struct ieee80211_sub_if_data *sdata,
3826                                     int powersave)
3827 {
3828         struct sk_buff *skb;
3829         struct ieee80211_hdr *nullfunc;
3830         __le16 fc;
3831
3832         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3833         if (!skb) {
3834                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3835                        "frame\n", sdata->dev->name);
3836                 return;
3837         }
3838         skb_reserve(skb, local->hw.extra_tx_headroom);
3839
3840         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3841         memset(nullfunc, 0, 24);
3842         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3843                          IEEE80211_FCTL_TODS);
3844         if (powersave)
3845                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3846         nullfunc->frame_control = fc;
3847         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3848         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3849         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3850
3851         ieee80211_sta_tx(sdata->dev, skb, 0);
3852 }
3853
3854
3855 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3856 {
3857         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3858             ieee80211_vif_is_mesh(&sdata->vif))
3859                 ieee80211_sta_timer((unsigned long)sdata);
3860 }
3861
3862 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3863 {
3864         struct ieee80211_local *local = hw_to_local(hw);
3865         struct net_device *dev = local->scan_dev;
3866         struct ieee80211_sub_if_data *sdata;
3867         union iwreq_data wrqu;
3868
3869         local->last_scan_completed = jiffies;
3870         memset(&wrqu, 0, sizeof(wrqu));
3871         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3872
3873         if (local->sta_hw_scanning) {
3874                 local->sta_hw_scanning = 0;
3875                 if (ieee80211_hw_config(local))
3876                         printk(KERN_DEBUG "%s: failed to restore operational "
3877                                "channel after scan\n", dev->name);
3878                 /* Restart STA timer for HW scan case */
3879                 rcu_read_lock();
3880                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3881                         ieee80211_restart_sta_timer(sdata);
3882                 rcu_read_unlock();
3883
3884                 goto done;
3885         }
3886
3887         local->sta_sw_scanning = 0;
3888         if (ieee80211_hw_config(local))
3889                 printk(KERN_DEBUG "%s: failed to restore operational "
3890                        "channel after scan\n", dev->name);
3891
3892
3893         netif_tx_lock_bh(local->mdev);
3894         netif_addr_lock(local->mdev);
3895         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3896         local->ops->configure_filter(local_to_hw(local),
3897                                      FIF_BCN_PRBRESP_PROMISC,
3898                                      &local->filter_flags,
3899                                      local->mdev->mc_count,
3900                                      local->mdev->mc_list);
3901
3902         netif_addr_unlock(local->mdev);
3903         netif_tx_unlock_bh(local->mdev);
3904
3905         rcu_read_lock();
3906         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3907                 /* Tell AP we're back */
3908                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3909                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3910                         ieee80211_send_nullfunc(local, sdata, 0);
3911
3912                 ieee80211_restart_sta_timer(sdata);
3913
3914                 netif_wake_queue(sdata->dev);
3915         }
3916         rcu_read_unlock();
3917
3918 done:
3919         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3920         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3921                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3922                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3923                     (!(ifsta->state == IEEE80211_IBSS_JOINED) &&
3924                     !ieee80211_sta_active_ibss(dev)))
3925                         ieee80211_sta_find_ibss(dev, ifsta);
3926         }
3927 }
3928 EXPORT_SYMBOL(ieee80211_scan_completed);
3929
3930 void ieee80211_sta_scan_work(struct work_struct *work)
3931 {
3932         struct ieee80211_local *local =
3933                 container_of(work, struct ieee80211_local, scan_work.work);
3934         struct net_device *dev = local->scan_dev;
3935         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3936         struct ieee80211_supported_band *sband;
3937         struct ieee80211_channel *chan;
3938         int skip;
3939         unsigned long next_delay = 0;
3940
3941         if (!local->sta_sw_scanning)
3942                 return;
3943
3944         switch (local->scan_state) {
3945         case SCAN_SET_CHANNEL:
3946                 /*
3947                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3948                  * after we successfully scanned the last channel of the last
3949                  * band (and the last band is supported by the hw)
3950                  */
3951                 if (local->scan_band < IEEE80211_NUM_BANDS)
3952                         sband = local->hw.wiphy->bands[local->scan_band];
3953                 else
3954                         sband = NULL;
3955
3956                 /*
3957                  * If we are at an unsupported band and have more bands
3958                  * left to scan, advance to the next supported one.
3959                  */
3960                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3961                         local->scan_band++;
3962                         sband = local->hw.wiphy->bands[local->scan_band];
3963                         local->scan_channel_idx = 0;
3964                 }
3965
3966                 /* if no more bands/channels left, complete scan */
3967                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3968                         ieee80211_scan_completed(local_to_hw(local));
3969                         return;
3970                 }
3971                 skip = 0;
3972                 chan = &sband->channels[local->scan_channel_idx];
3973
3974                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3975                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3976                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3977                         skip = 1;
3978
3979                 if (!skip) {
3980                         local->scan_channel = chan;
3981                         if (ieee80211_hw_config(local)) {
3982                                 printk(KERN_DEBUG "%s: failed to set freq to "
3983                                        "%d MHz for scan\n", dev->name,
3984                                        chan->center_freq);
3985                                 skip = 1;
3986                         }
3987                 }
3988
3989                 /* advance state machine to next channel/band */
3990                 local->scan_channel_idx++;
3991                 if (local->scan_channel_idx >= sband->n_channels) {
3992                         /*
3993                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3994                          * we'll catch that case above and complete the scan
3995                          * if that is the case.
3996                          */
3997                         local->scan_band++;
3998                         local->scan_channel_idx = 0;
3999                 }
4000
4001                 if (skip)
4002                         break;
4003
4004                 next_delay = IEEE80211_PROBE_DELAY +
4005                              usecs_to_jiffies(local->hw.channel_change_time);
4006                 local->scan_state = SCAN_SEND_PROBE;
4007                 break;
4008         case SCAN_SEND_PROBE:
4009                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
4010                 local->scan_state = SCAN_SET_CHANNEL;
4011
4012                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
4013                         break;
4014                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
4015                                          local->scan_ssid_len);
4016                 next_delay = IEEE80211_CHANNEL_TIME;
4017                 break;
4018         }
4019
4020         if (local->sta_sw_scanning)
4021                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4022                                    next_delay);
4023 }
4024
4025
4026 static int ieee80211_sta_start_scan(struct net_device *dev,
4027                                     u8 *ssid, size_t ssid_len)
4028 {
4029         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4030         struct ieee80211_sub_if_data *sdata;
4031
4032         if (ssid_len > IEEE80211_MAX_SSID_LEN)
4033                 return -EINVAL;
4034
4035         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
4036          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4037          * BSSID: MACAddress
4038          * SSID
4039          * ScanType: ACTIVE, PASSIVE
4040          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4041          *    a Probe frame during active scanning
4042          * ChannelList
4043          * MinChannelTime (>= ProbeDelay), in TU
4044          * MaxChannelTime: (>= MinChannelTime), in TU
4045          */
4046
4047          /* MLME-SCAN.confirm
4048           * BSSDescriptionSet
4049           * ResultCode: SUCCESS, INVALID_PARAMETERS
4050          */
4051
4052         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4053                 if (local->scan_dev == dev)
4054                         return 0;
4055                 return -EBUSY;
4056         }
4057
4058         if (local->ops->hw_scan) {
4059                 int rc = local->ops->hw_scan(local_to_hw(local),
4060                                              ssid, ssid_len);
4061                 if (!rc) {
4062                         local->sta_hw_scanning = 1;
4063                         local->scan_dev = dev;
4064                 }
4065                 return rc;
4066         }
4067
4068         local->sta_sw_scanning = 1;
4069
4070         rcu_read_lock();
4071         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4072                 netif_stop_queue(sdata->dev);
4073                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4074                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4075                         ieee80211_send_nullfunc(local, sdata, 1);
4076         }
4077         rcu_read_unlock();
4078
4079         if (ssid) {
4080                 local->scan_ssid_len = ssid_len;
4081                 memcpy(local->scan_ssid, ssid, ssid_len);
4082         } else
4083                 local->scan_ssid_len = 0;
4084         local->scan_state = SCAN_SET_CHANNEL;
4085         local->scan_channel_idx = 0;
4086         local->scan_band = IEEE80211_BAND_2GHZ;
4087         local->scan_dev = dev;
4088
4089         netif_addr_lock_bh(local->mdev);
4090         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4091         local->ops->configure_filter(local_to_hw(local),
4092                                      FIF_BCN_PRBRESP_PROMISC,
4093                                      &local->filter_flags,
4094                                      local->mdev->mc_count,
4095                                      local->mdev->mc_list);
4096         netif_addr_unlock_bh(local->mdev);
4097
4098         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4099         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4100                            IEEE80211_CHANNEL_TIME);
4101
4102         return 0;
4103 }
4104
4105
4106 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4107 {
4108         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4109         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4110         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4111
4112         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4113                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4114
4115         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4116                 if (local->scan_dev == dev)
4117                         return 0;
4118                 return -EBUSY;
4119         }
4120
4121         ifsta->scan_ssid_len = ssid_len;
4122         if (ssid_len)
4123                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4124         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4125         queue_work(local->hw.workqueue, &ifsta->work);
4126         return 0;
4127 }
4128
4129 static char *
4130 ieee80211_sta_scan_result(struct net_device *dev,
4131                           struct iw_request_info *info,
4132                           struct ieee80211_sta_bss *bss,
4133                           char *current_ev, char *end_buf)
4134 {
4135         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4136         struct iw_event iwe;
4137
4138         if (time_after(jiffies,
4139                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4140                 return current_ev;
4141
4142         memset(&iwe, 0, sizeof(iwe));
4143         iwe.cmd = SIOCGIWAP;
4144         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4145         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4146         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4147                                           IW_EV_ADDR_LEN);
4148
4149         memset(&iwe, 0, sizeof(iwe));
4150         iwe.cmd = SIOCGIWESSID;
4151         if (bss_mesh_cfg(bss)) {
4152                 iwe.u.data.length = bss_mesh_id_len(bss);
4153                 iwe.u.data.flags = 1;
4154                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4155                                                   &iwe, bss_mesh_id(bss));
4156         } else {
4157                 iwe.u.data.length = bss->ssid_len;
4158                 iwe.u.data.flags = 1;
4159                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4160                                                   &iwe, bss->ssid);
4161         }
4162
4163         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4164             || bss_mesh_cfg(bss)) {
4165                 memset(&iwe, 0, sizeof(iwe));
4166                 iwe.cmd = SIOCGIWMODE;
4167                 if (bss_mesh_cfg(bss))
4168                         iwe.u.mode = IW_MODE_MESH;
4169                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4170                         iwe.u.mode = IW_MODE_MASTER;
4171                 else
4172                         iwe.u.mode = IW_MODE_ADHOC;
4173                 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4174                                                   &iwe, IW_EV_UINT_LEN);
4175         }
4176
4177         memset(&iwe, 0, sizeof(iwe));
4178         iwe.cmd = SIOCGIWFREQ;
4179         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4180         iwe.u.freq.e = 0;
4181         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4182                                           IW_EV_FREQ_LEN);
4183
4184         memset(&iwe, 0, sizeof(iwe));
4185         iwe.cmd = SIOCGIWFREQ;
4186         iwe.u.freq.m = bss->freq;
4187         iwe.u.freq.e = 6;
4188         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4189                                           IW_EV_FREQ_LEN);
4190         memset(&iwe, 0, sizeof(iwe));
4191         iwe.cmd = IWEVQUAL;
4192         iwe.u.qual.qual = bss->qual;
4193         iwe.u.qual.level = bss->signal;
4194         iwe.u.qual.noise = bss->noise;
4195         iwe.u.qual.updated = local->wstats_flags;
4196         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4197                                           IW_EV_QUAL_LEN);
4198
4199         memset(&iwe, 0, sizeof(iwe));
4200         iwe.cmd = SIOCGIWENCODE;
4201         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4202                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4203         else
4204                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4205         iwe.u.data.length = 0;
4206         current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4207                                           &iwe, "");
4208
4209         if (bss && bss->wpa_ie) {
4210                 memset(&iwe, 0, sizeof(iwe));
4211                 iwe.cmd = IWEVGENIE;
4212                 iwe.u.data.length = bss->wpa_ie_len;
4213                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4214                                                   &iwe, bss->wpa_ie);
4215         }
4216
4217         if (bss && bss->rsn_ie) {
4218                 memset(&iwe, 0, sizeof(iwe));
4219                 iwe.cmd = IWEVGENIE;
4220                 iwe.u.data.length = bss->rsn_ie_len;
4221                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4222                                                   &iwe, bss->rsn_ie);
4223         }
4224
4225         if (bss && bss->ht_ie) {
4226                 memset(&iwe, 0, sizeof(iwe));
4227                 iwe.cmd = IWEVGENIE;
4228                 iwe.u.data.length = bss->ht_ie_len;
4229                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4230                                                   &iwe, bss->ht_ie);
4231         }
4232
4233         if (bss && bss->supp_rates_len > 0) {
4234                 /* display all supported rates in readable format */
4235                 char *p = current_ev + iwe_stream_lcp_len(info);
4236                 int i;
4237
4238                 memset(&iwe, 0, sizeof(iwe));
4239                 iwe.cmd = SIOCGIWRATE;
4240                 /* Those two flags are ignored... */
4241                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4242
4243                 for (i = 0; i < bss->supp_rates_len; i++) {
4244                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4245                                                         0x7f) * 500000);
4246                         p = iwe_stream_add_value(info, current_ev, p,
4247                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4248                 }
4249                 current_ev = p;
4250         }
4251
4252         if (bss) {
4253                 char *buf;
4254                 buf = kmalloc(30, GFP_ATOMIC);
4255                 if (buf) {
4256                         memset(&iwe, 0, sizeof(iwe));
4257                         iwe.cmd = IWEVCUSTOM;
4258                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4259                         iwe.u.data.length = strlen(buf);
4260                         current_ev = iwe_stream_add_point(info, current_ev,
4261                                                           end_buf,
4262                                                           &iwe, buf);
4263                         memset(&iwe, 0, sizeof(iwe));
4264                         iwe.cmd = IWEVCUSTOM;
4265                         sprintf(buf, " Last beacon: %dms ago",
4266                                 jiffies_to_msecs(jiffies - bss->last_update));
4267                         iwe.u.data.length = strlen(buf);
4268                         current_ev = iwe_stream_add_point(info, current_ev,
4269                                                           end_buf, &iwe, buf);
4270                         kfree(buf);
4271                 }
4272         }
4273
4274         if (bss_mesh_cfg(bss)) {
4275                 char *buf;
4276                 u8 *cfg = bss_mesh_cfg(bss);
4277                 buf = kmalloc(50, GFP_ATOMIC);
4278                 if (buf) {
4279                         memset(&iwe, 0, sizeof(iwe));
4280                         iwe.cmd = IWEVCUSTOM;
4281                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4282                         iwe.u.data.length = strlen(buf);
4283                         current_ev = iwe_stream_add_point(info, current_ev,
4284                                                           end_buf,
4285                                                           &iwe, buf);
4286                         sprintf(buf, "Path Selection Protocol ID: "
4287                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4288                                                         cfg[4]);
4289                         iwe.u.data.length = strlen(buf);
4290                         current_ev = iwe_stream_add_point(info, current_ev,
4291                                                           end_buf,
4292                                                           &iwe, buf);
4293                         sprintf(buf, "Path Selection Metric ID: "
4294                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4295                                                         cfg[8]);
4296                         iwe.u.data.length = strlen(buf);
4297                         current_ev = iwe_stream_add_point(info, current_ev,
4298                                                           end_buf,
4299                                                           &iwe, buf);
4300                         sprintf(buf, "Congestion Control Mode ID: "
4301                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4302                                                         cfg[11], cfg[12]);
4303                         iwe.u.data.length = strlen(buf);
4304                         current_ev = iwe_stream_add_point(info, current_ev,
4305                                                           end_buf,
4306                                                           &iwe, buf);
4307                         sprintf(buf, "Channel Precedence: "
4308                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4309                                                         cfg[15], cfg[16]);
4310                         iwe.u.data.length = strlen(buf);
4311                         current_ev = iwe_stream_add_point(info, current_ev,
4312                                                           end_buf,
4313                                                           &iwe, buf);
4314                         kfree(buf);
4315                 }
4316         }
4317
4318         return current_ev;
4319 }
4320
4321
4322 int ieee80211_sta_scan_results(struct net_device *dev,
4323                                struct iw_request_info *info,
4324                                char *buf, size_t len)
4325 {
4326         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4327         char *current_ev = buf;
4328         char *end_buf = buf + len;
4329         struct ieee80211_sta_bss *bss;
4330
4331         spin_lock_bh(&local->sta_bss_lock);
4332         list_for_each_entry(bss, &local->sta_bss_list, list) {
4333                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4334                         spin_unlock_bh(&local->sta_bss_lock);
4335                         return -E2BIG;
4336                 }
4337                 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4338                                                        current_ev, end_buf);
4339         }
4340         spin_unlock_bh(&local->sta_bss_lock);
4341         return current_ev - buf;
4342 }
4343
4344
4345 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4346 {
4347         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4348         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4349
4350         kfree(ifsta->extra_ie);
4351         if (len == 0) {
4352                 ifsta->extra_ie = NULL;
4353                 ifsta->extra_ie_len = 0;
4354                 return 0;
4355         }
4356         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4357         if (!ifsta->extra_ie) {
4358                 ifsta->extra_ie_len = 0;
4359                 return -ENOMEM;
4360         }
4361         memcpy(ifsta->extra_ie, ie, len);
4362         ifsta->extra_ie_len = len;
4363         return 0;
4364 }
4365
4366
4367 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4368                                         struct sk_buff *skb, u8 *bssid,
4369                                         u8 *addr, u64 supp_rates)
4370 {
4371         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4372         struct sta_info *sta;
4373         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4374         DECLARE_MAC_BUF(mac);
4375         int band = local->hw.conf.channel->band;
4376
4377         /* TODO: Could consider removing the least recently used entry and
4378          * allow new one to be added. */
4379         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4380                 if (net_ratelimit()) {
4381                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4382                                "entry %s\n", dev->name, print_mac(mac, addr));
4383                 }
4384                 return NULL;
4385         }
4386
4387         if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4388                 return NULL;
4389
4390 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4391         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4392                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4393 #endif
4394
4395         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4396         if (!sta)
4397                 return NULL;
4398
4399         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4400
4401         if (supp_rates)
4402                 sta->supp_rates[band] = supp_rates;
4403         else
4404                 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4405
4406         rate_control_rate_init(sta, local);
4407
4408         if (sta_info_insert(sta))
4409                 return NULL;
4410
4411         return sta;
4412 }
4413
4414
4415 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4416 {
4417         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4418         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4419
4420         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4421                dev->name, reason);
4422
4423         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4424             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4425                 return -EINVAL;
4426
4427         ieee80211_send_deauth(dev, ifsta, reason);
4428         ieee80211_set_disassoc(dev, ifsta, 1);
4429         return 0;
4430 }
4431
4432
4433 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4434 {
4435         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4436         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4437
4438         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4439                dev->name, reason);
4440
4441         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4442                 return -EINVAL;
4443
4444         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4445                 return -1;
4446
4447         ieee80211_send_disassoc(dev, ifsta, reason);
4448         ieee80211_set_disassoc(dev, ifsta, 0);
4449         return 0;
4450 }
4451
4452 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4453                           enum ieee80211_notification_types  notif_type)
4454 {
4455         struct ieee80211_local *local = hw_to_local(hw);
4456         struct ieee80211_sub_if_data *sdata;
4457
4458         switch (notif_type) {
4459         case IEEE80211_NOTIFY_RE_ASSOC:
4460                 rcu_read_lock();
4461                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4462                         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4463                                 continue;
4464
4465                         ieee80211_sta_req_auth(sdata->dev, &sdata->u.sta);
4466                 }
4467                 rcu_read_unlock();
4468                 break;
4469         }
4470 }
4471 EXPORT_SYMBOL(ieee80211_notify_mac);