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