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 net_device *dev,
  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 = pos[2] | (pos[3] << 8);
 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         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 370         DECLARE_MAC_BUF(mac);
 371         u32 changed = 0;
 372
 373         if (use_protection != bss_conf->use_cts_prot) {
 374 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 375                 if (net_ratelimit()) {
 376                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 377                                "%s)\n",
 378                                sdata->dev->name,
 379                                use_protection ? "enabled" : "disabled",
 380                                print_mac(mac, ifsta->bssid));
 381                 }
 382 #endif
 383                 bss_conf->use_cts_prot = use_protection;
 384                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 385         }
 386
 387         if (use_short_preamble != bss_conf->use_short_preamble) {
 388 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 389                 if (net_ratelimit()) {
 390                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 391                                " (BSSID=%s)\n",
 392                                sdata->dev->name,
 393                                use_short_preamble ? "short" : "long",
 394                                print_mac(mac, ifsta->bssid));
 395                 }
 396 #endif
 397                 bss_conf->use_short_preamble = use_short_preamble;
 398                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 399         }
 400
 401         return changed;
 402 }
 403
 404 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 405                                    u8 erp_value)
 406 {
 407         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 408         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 409
 410         return ieee80211_handle_protect_preamb(sdata,
 411                         use_protection, use_short_preamble);
 412 }
 413
 414 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 415                                            struct ieee80211_sta_bss *bss)
 416 {
 417         u32 changed = 0;
 418
 419         if (bss->has_erp_value)
 420                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 421         else {
 422                 u16 capab = bss->capability;
 423                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 424                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 425         }
 426
 427         return changed;
 428 }
 429
 430 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 431                                    struct ieee80211_ht_info *ht_info)
 432 {
 433
 434         if (ht_info == NULL)
 435                 return -EINVAL;
 436
 437         memset(ht_info, 0, sizeof(*ht_info));
 438
 439         if (ht_cap_ie) {
 440                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 441
 442                 ht_info->ht_supported = 1;
 443                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 444                 ht_info->ampdu_factor =
 445                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 446                 ht_info->ampdu_density =
 447                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 448                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 449         } else
 450                 ht_info->ht_supported = 0;
 451
 452         return 0;
 453 }
 454
 455 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 456                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 457                         struct ieee80211_ht_bss_info *bss_info)
 458 {
 459         if (bss_info == NULL)
 460                 return -EINVAL;
 461
 462         memset(bss_info, 0, sizeof(*bss_info));
 463
 464         if (ht_add_info_ie) {
 465                 u16 op_mode;
 466                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 467
 468                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 469                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 470                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 471         }
 472
 473         return 0;
 474 }
 475
 476 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 477                                          struct ieee80211_if_sta *ifsta)
 478 {
 479         char *buf;
 480         size_t len;
 481         int i;
 482         union iwreq_data wrqu;
 483
 484         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 485                 return;
 486
 487         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 488                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 489         if (!buf)
 490                 return;
 491
 492         len = sprintf(buf, "ASSOCINFO(");
 493         if (ifsta->assocreq_ies) {
 494                 len += sprintf(buf + len, "ReqIEs=");
 495                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 496                         len += sprintf(buf + len, "%02x",
 497                                        ifsta->assocreq_ies[i]);
 498                 }
 499         }
 500         if (ifsta->assocresp_ies) {
 501                 if (ifsta->assocreq_ies)
 502                         len += sprintf(buf + len, " ");
 503                 len += sprintf(buf + len, "RespIEs=");
 504                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 505                         len += sprintf(buf + len, "%02x",
 506                                        ifsta->assocresp_ies[i]);
 507                 }
 508         }
 509         len += sprintf(buf + len, ")");
 510
 511         if (len > IW_CUSTOM_MAX) {
 512                 len = sprintf(buf, "ASSOCRESPIE=");
 513                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 514                         len += sprintf(buf + len, "%02x",
 515                                        ifsta->assocresp_ies[i]);
 516                 }
 517         }
 518
 519         memset(&wrqu, 0, sizeof(wrqu));
 520         wrqu.data.length = len;
 521         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 522
 523         kfree(buf);
 524 }
 525
 526
 527 static void ieee80211_set_associated(struct net_device *dev,
 528                                      struct ieee80211_if_sta *ifsta,
 529                                      bool assoc)
 530 {
 531         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 532         struct ieee80211_local *local = sdata->local;
 533         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 534         union iwreq_data wrqu;
 535         u32 changed = BSS_CHANGED_ASSOC;
 536
 537         if (assoc) {
 538                 struct ieee80211_sta_bss *bss;
 539
 540                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 541
 542                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 543                         return;
 544
 545                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 546                                            conf->channel->center_freq,
 547                                            ifsta->ssid, ifsta->ssid_len);
 548                 if (bss) {
 549                         /* set timing information */
 550                         sdata->bss_conf.beacon_int = bss->beacon_int;
 551                         sdata->bss_conf.timestamp = bss->timestamp;
 552
 553                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 554
 555                         ieee80211_rx_bss_put(dev, bss);
 556                 }
 557
 558                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 559                         changed |= BSS_CHANGED_HT;
 560                         sdata->bss_conf.assoc_ht = 1;
 561                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 562                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 563                 }
 564
 565                 netif_carrier_on(dev);
 566                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 567                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 568                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 569                 ieee80211_sta_send_associnfo(dev, ifsta);
 570         } else {
 571                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 572                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 573                 netif_carrier_off(dev);
 574                 ieee80211_reset_erp_info(dev);
 575
 576                 sdata->bss_conf.assoc_ht = 0;
 577                 sdata->bss_conf.ht_conf = NULL;
 578                 sdata->bss_conf.ht_bss_conf = NULL;
 579
 580                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 581         }
 582         ifsta->last_probe = jiffies;
 583         ieee80211_led_assoc(local, assoc);
 584
 585         sdata->bss_conf.assoc = assoc;
 586         ieee80211_bss_info_change_notify(sdata, changed);
 587         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 588         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 589 }
 590
 591 static void ieee80211_set_disassoc(struct net_device *dev,
 592                                    struct ieee80211_if_sta *ifsta, int deauth)
 593 {
 594         if (deauth)
 595                 ifsta->auth_tries = 0;
 596         ifsta->assoc_tries = 0;
 597         ieee80211_set_associated(dev, ifsta, 0);
 598 }
 599
 600 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 601                       int encrypt)
 602 {
 603         struct ieee80211_sub_if_data *sdata;
 604         struct ieee80211_tx_info *info;
 605
 606         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 607         skb->dev = sdata->local->mdev;
 608         skb_set_mac_header(skb, 0);
 609         skb_set_network_header(skb, 0);
 610         skb_set_transport_header(skb, 0);
 611
 612         info = IEEE80211_SKB_CB(skb);
 613         memset(info, 0, sizeof(struct ieee80211_tx_info));
 614         info->control.ifindex = sdata->dev->ifindex;
 615         if (!encrypt)
 616                 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
 617
 618         dev_queue_xmit(skb);
 619 }
 620
 621
 622 static void ieee80211_send_auth(struct net_device *dev,
 623                                 struct ieee80211_if_sta *ifsta,
 624                                 int transaction, u8 *extra, size_t extra_len,
 625                                 int encrypt)
 626 {
 627         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 628         struct sk_buff *skb;
 629         struct ieee80211_mgmt *mgmt;
 630
 631         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 632                             sizeof(*mgmt) + 6 + extra_len);
 633         if (!skb) {
 634                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 635                        "frame\n", dev->name);
 636                 return;
 637         }
 638         skb_reserve(skb, local->hw.extra_tx_headroom);
 639
 640         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 641         memset(mgmt, 0, 24 + 6);
 642         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 643                                            IEEE80211_STYPE_AUTH);
 644         if (encrypt)
 645                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 646         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 647         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 648         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 649         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 650         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 651         ifsta->auth_transaction = transaction + 1;
 652         mgmt->u.auth.status_code = cpu_to_le16(0);
 653         if (extra)
 654                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 655
 656         ieee80211_sta_tx(dev, skb, encrypt);
 657 }
 658
 659
 660 static void ieee80211_authenticate(struct net_device *dev,
 661                                    struct ieee80211_if_sta *ifsta)
 662 {
 663         DECLARE_MAC_BUF(mac);
 664
 665         ifsta->auth_tries++;
 666         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 667                 printk(KERN_DEBUG "%s: authentication with AP %s"
 668                        " timed out\n",
 669                        dev->name, print_mac(mac, ifsta->bssid));
 670                 ifsta->state = IEEE80211_DISABLED;
 671                 return;
 672         }
 673
 674         ifsta->state = IEEE80211_AUTHENTICATE;
 675         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 676                dev->name, print_mac(mac, ifsta->bssid));
 677
 678         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 679
 680         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 681 }
 682
 683 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 684                                       struct ieee80211_supported_band *sband,
 685                                       u64 *rates)
 686 {
 687         int i, j, count;
 688         *rates = 0;
 689         count = 0;
 690         for (i = 0; i < bss->supp_rates_len; i++) {
 691                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 692
 693                 for (j = 0; j < sband->n_bitrates; j++)
 694                         if (sband->bitrates[j].bitrate == rate) {
 695                                 *rates |= BIT(j);
 696                                 count++;
 697                                 break;
 698                         }
 699         }
 700
 701         return count;
 702 }
 703
 704 static void ieee80211_send_assoc(struct net_device *dev,
 705                                  struct ieee80211_if_sta *ifsta)
 706 {
 707         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 708         struct sk_buff *skb;
 709         struct ieee80211_mgmt *mgmt;
 710         u8 *pos, *ies;
 711         int i, len, count, rates_len, supp_rates_len;
 712         u16 capab;
 713         struct ieee80211_sta_bss *bss;
 714         int wmm = 0;
 715         struct ieee80211_supported_band *sband;
 716         u64 rates = 0;
 717
 718         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 719                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 720                             ifsta->ssid_len);
 721         if (!skb) {
 722                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 723                        "frame\n", dev->name);
 724                 return;
 725         }
 726         skb_reserve(skb, local->hw.extra_tx_headroom);
 727
 728         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 729
 730         capab = ifsta->capab;
 731
 732         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 733                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 734                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 735                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 736                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 737         }
 738
 739         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 740                                    local->hw.conf.channel->center_freq,
 741                                    ifsta->ssid, ifsta->ssid_len);
 742         if (bss) {
 743                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 744                         capab |= WLAN_CAPABILITY_PRIVACY;
 745                 if (bss->wmm_ie)
 746                         wmm = 1;
 747
 748                 /* get all rates supported by the device and the AP as
 749                  * some APs don't like getting a superset of their rates
 750                  * in the association request (e.g. D-Link DAP 1353 in
 751                  * b-only mode) */
 752                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 753
 754                 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 755                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 756                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 757
 758                 ieee80211_rx_bss_put(dev, bss);
 759         } else {
 760                 rates = ~0;
 761                 rates_len = sband->n_bitrates;
 762         }
 763
 764         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 765         memset(mgmt, 0, 24);
 766         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 767         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 768         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 769
 770         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 771                 skb_put(skb, 10);
 772                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 773                                                    IEEE80211_STYPE_REASSOC_REQ);
 774                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 775                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 776                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 777                        ETH_ALEN);
 778         } else {
 779                 skb_put(skb, 4);
 780                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 781                                                    IEEE80211_STYPE_ASSOC_REQ);
 782                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 783                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 784         }
 785
 786         /* SSID */
 787         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 788         *pos++ = WLAN_EID_SSID;
 789         *pos++ = ifsta->ssid_len;
 790         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 791
 792         /* add all rates which were marked to be used above */
 793         supp_rates_len = rates_len;
 794         if (supp_rates_len > 8)
 795                 supp_rates_len = 8;
 796
 797         len = sband->n_bitrates;
 798         pos = skb_put(skb, supp_rates_len + 2);
 799         *pos++ = WLAN_EID_SUPP_RATES;
 800         *pos++ = supp_rates_len;
 801
 802         count = 0;
 803         for (i = 0; i < sband->n_bitrates; i++) {
 804                 if (BIT(i) & rates) {
 805                         int rate = sband->bitrates[i].bitrate;
 806                         *pos++ = (u8) (rate / 5);
 807                         if (++count == 8)
 808                                 break;
 809                 }
 810         }
 811
 812         if (count == 8) {
 813                 pos = skb_put(skb, rates_len - count + 2);
 814                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 815                 *pos++ = rates_len - count;
 816
 817                 for (i++; i < sband->n_bitrates; i++) {
 818                         if (BIT(i) & rates) {
 819                                 int rate = sband->bitrates[i].bitrate;
 820                                 *pos++ = (u8) (rate / 5);
 821                         }
 822                 }
 823         }
 824
 825         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 826                 /* 1. power capabilities */
 827                 pos = skb_put(skb, 4);
 828                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 829                 *pos++ = 2;
 830                 *pos++ = 0; /* min tx power */
 831                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 832
 833                 /* 2. supported channels */
 834                 /* TODO: get this in reg domain format */
 835                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 836                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 837                 *pos++ = 2 * sband->n_channels;
 838                 for (i = 0; i < sband->n_channels; i++) {
 839                         *pos++ = ieee80211_frequency_to_channel(
 840                                         sband->channels[i].center_freq);
 841                         *pos++ = 1; /* one channel in the subband*/
 842                 }
 843         }
 844
 845         if (ifsta->extra_ie) {
 846                 pos = skb_put(skb, ifsta->extra_ie_len);
 847                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 848         }
 849
 850         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 851                 pos = skb_put(skb, 9);
 852                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 853                 *pos++ = 7; /* len */
 854                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 855                 *pos++ = 0x50;
 856                 *pos++ = 0xf2;
 857                 *pos++ = 2; /* WME */
 858                 *pos++ = 0; /* WME info */
 859                 *pos++ = 1; /* WME ver */
 860                 *pos++ = 0;
 861         }
 862
 863         /* wmm support is a must to HT */
 864         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 865             sband->ht_info.ht_supported && bss->ht_add_ie) {
 866                 struct ieee80211_ht_addt_info *ht_add_info =
 867                         (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
 868                 u16 cap = sband->ht_info.cap;
 869                 __le16 tmp;
 870                 u32 flags = local->hw.conf.channel->flags;
 871
 872                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 873                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 874                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 875                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 876                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 877                         }
 878                         break;
 879                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 880                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 881                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 882                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 883                         }
 884                         break;
 885                 }
 886
 887                 tmp = cpu_to_le16(cap);
 888                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 889                 *pos++ = WLAN_EID_HT_CAPABILITY;
 890                 *pos++ = sizeof(struct ieee80211_ht_cap);
 891                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 892                 memcpy(pos, &tmp, sizeof(u16));
 893                 pos += sizeof(u16);
 894                 /* TODO: needs a define here for << 2 */
 895                 *pos++ = sband->ht_info.ampdu_factor |
 896                          (sband->ht_info.ampdu_density << 2);
 897                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 898         }
 899
 900         kfree(ifsta->assocreq_ies);
 901         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 902         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 903         if (ifsta->assocreq_ies)
 904                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 905
 906         ieee80211_sta_tx(dev, skb, 0);
 907 }
 908
 909
 910 static void ieee80211_send_deauth(struct net_device *dev,
 911                                   struct ieee80211_if_sta *ifsta, u16 reason)
 912 {
 913         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 914         struct sk_buff *skb;
 915         struct ieee80211_mgmt *mgmt;
 916
 917         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 918         if (!skb) {
 919                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 920                        "frame\n", dev->name);
 921                 return;
 922         }
 923         skb_reserve(skb, local->hw.extra_tx_headroom);
 924
 925         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 926         memset(mgmt, 0, 24);
 927         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 928         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 929         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 930         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 931                                            IEEE80211_STYPE_DEAUTH);
 932         skb_put(skb, 2);
 933         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 934
 935         ieee80211_sta_tx(dev, skb, 0);
 936 }
 937
 938
 939 static void ieee80211_send_disassoc(struct net_device *dev,
 940                                     struct ieee80211_if_sta *ifsta, u16 reason)
 941 {
 942         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 943         struct sk_buff *skb;
 944         struct ieee80211_mgmt *mgmt;
 945
 946         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 947         if (!skb) {
 948                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 949                        "frame\n", dev->name);
 950                 return;
 951         }
 952         skb_reserve(skb, local->hw.extra_tx_headroom);
 953
 954         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 955         memset(mgmt, 0, 24);
 956         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 957         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 958         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 959         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 960                                            IEEE80211_STYPE_DISASSOC);
 961         skb_put(skb, 2);
 962         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 963
 964         ieee80211_sta_tx(dev, skb, 0);
 965 }
 966
 967
 968 static int ieee80211_privacy_mismatch(struct net_device *dev,
 969                                       struct ieee80211_if_sta *ifsta)
 970 {
 971         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 972         struct ieee80211_sta_bss *bss;
 973         int bss_privacy;
 974         int wep_privacy;
 975         int privacy_invoked;
 976
 977         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 978                 return 0;
 979
 980         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 981                                    local->hw.conf.channel->center_freq,
 982                                    ifsta->ssid, ifsta->ssid_len);
 983         if (!bss)
 984                 return 0;
 985
 986         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 987         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 988         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 989
 990         ieee80211_rx_bss_put(dev, bss);
 991
 992         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 993                 return 0;
 994
 995         return 1;
 996 }
 997
 998
 999 static void ieee80211_associate(struct net_device *dev,
1000                                 struct ieee80211_if_sta *ifsta)
1001 {
1002         DECLARE_MAC_BUF(mac);
1003
1004         ifsta->assoc_tries++;
1005         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1006                 printk(KERN_DEBUG "%s: association with AP %s"
1007                        " timed out\n",
1008                        dev->name, print_mac(mac, ifsta->bssid));
1009                 ifsta->state = IEEE80211_DISABLED;
1010                 return;
1011         }
1012
1013         ifsta->state = IEEE80211_ASSOCIATE;
1014         printk(KERN_DEBUG "%s: associate with AP %s\n",
1015                dev->name, print_mac(mac, ifsta->bssid));
1016         if (ieee80211_privacy_mismatch(dev, ifsta)) {
1017                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1018                        "mixed-cell disabled - abort association\n", dev->name);
1019                 ifsta->state = IEEE80211_DISABLED;
1020                 return;
1021         }
1022
1023         ieee80211_send_assoc(dev, ifsta);
1024
1025         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1026 }
1027
1028
1029 static void ieee80211_associated(struct net_device *dev,
1030                                  struct ieee80211_if_sta *ifsta)
1031 {
1032         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1033         struct sta_info *sta;
1034         int disassoc;
1035         DECLARE_MAC_BUF(mac);
1036
1037         /* TODO: start monitoring current AP signal quality and number of
1038          * missed beacons. Scan other channels every now and then and search
1039          * for better APs. */
1040         /* TODO: remove expired BSSes */
1041
1042         ifsta->state = IEEE80211_ASSOCIATED;
1043
1044         rcu_read_lock();
1045
1046         sta = sta_info_get(local, ifsta->bssid);
1047         if (!sta) {
1048                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1049                        dev->name, print_mac(mac, ifsta->bssid));
1050                 disassoc = 1;
1051         } else {
1052                 disassoc = 0;
1053                 if (time_after(jiffies,
1054                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1055                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1056                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1057                                        "current AP %s - assume out of "
1058                                        "range\n",
1059                                        dev->name, print_mac(mac, ifsta->bssid));
1060                                 disassoc = 1;
1061                                 sta_info_unlink(&sta);
1062                         } else
1063                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1064                                                          local->scan_ssid,
1065                                                          local->scan_ssid_len);
1066                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1067                 } else {
1068                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1069                         if (time_after(jiffies, ifsta->last_probe +
1070                                        IEEE80211_PROBE_INTERVAL)) {
1071                                 ifsta->last_probe = jiffies;
1072                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1073                                                          ifsta->ssid,
1074                                                          ifsta->ssid_len);
1075                         }
1076                 }
1077         }
1078
1079         rcu_read_unlock();
1080
1081         if (disassoc && sta)
1082                 sta_info_destroy(sta);
1083
1084         if (disassoc) {
1085                 ifsta->state = IEEE80211_DISABLED;
1086                 ieee80211_set_associated(dev, ifsta, 0);
1087         } else {
1088                 mod_timer(&ifsta->timer, jiffies +
1089                                       IEEE80211_MONITORING_INTERVAL);
1090         }
1091 }
1092
1093
1094 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1095                                      u8 *ssid, size_t ssid_len)
1096 {
1097         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1098         struct ieee80211_supported_band *sband;
1099         struct sk_buff *skb;
1100         struct ieee80211_mgmt *mgmt;
1101         u8 *pos, *supp_rates, *esupp_rates = NULL;
1102         int i;
1103
1104         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1105         if (!skb) {
1106                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1107                        "request\n", dev->name);
1108                 return;
1109         }
1110         skb_reserve(skb, local->hw.extra_tx_headroom);
1111
1112         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1113         memset(mgmt, 0, 24);
1114         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1115                                            IEEE80211_STYPE_PROBE_REQ);
1116         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1117         if (dst) {
1118                 memcpy(mgmt->da, dst, ETH_ALEN);
1119                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1120         } else {
1121                 memset(mgmt->da, 0xff, ETH_ALEN);
1122                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1123         }
1124         pos = skb_put(skb, 2 + ssid_len);
1125         *pos++ = WLAN_EID_SSID;
1126         *pos++ = ssid_len;
1127         memcpy(pos, ssid, ssid_len);
1128
1129         supp_rates = skb_put(skb, 2);
1130         supp_rates[0] = WLAN_EID_SUPP_RATES;
1131         supp_rates[1] = 0;
1132         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1133
1134         for (i = 0; i < sband->n_bitrates; i++) {
1135                 struct ieee80211_rate *rate = &sband->bitrates[i];
1136                 if (esupp_rates) {
1137                         pos = skb_put(skb, 1);
1138                         esupp_rates[1]++;
1139                 } else if (supp_rates[1] == 8) {
1140                         esupp_rates = skb_put(skb, 3);
1141                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1142                         esupp_rates[1] = 1;
1143                         pos = &esupp_rates[2];
1144                 } else {
1145                         pos = skb_put(skb, 1);
1146                         supp_rates[1]++;
1147                 }
1148                 *pos = rate->bitrate / 5;
1149         }
1150
1151         ieee80211_sta_tx(dev, skb, 0);
1152 }
1153
1154
1155 static int ieee80211_sta_wep_configured(struct net_device *dev)
1156 {
1157         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1158         if (!sdata || !sdata->default_key ||
1159             sdata->default_key->conf.alg != ALG_WEP)
1160                 return 0;
1161         return 1;
1162 }
1163
1164
1165 static void ieee80211_auth_completed(struct net_device *dev,
1166                                      struct ieee80211_if_sta *ifsta)
1167 {
1168         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1169         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1170         ieee80211_associate(dev, ifsta);
1171 }
1172
1173
1174 static void ieee80211_auth_challenge(struct net_device *dev,
1175                                      struct ieee80211_if_sta *ifsta,
1176                                      struct ieee80211_mgmt *mgmt,
1177                                      size_t len)
1178 {
1179         u8 *pos;
1180         struct ieee802_11_elems elems;
1181
1182         pos = mgmt->u.auth.variable;
1183         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1184         if (!elems.challenge)
1185                 return;
1186         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1187                             elems.challenge_len + 2, 1);
1188 }
1189
1190 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1191                                         u8 dialog_token, u16 status, u16 policy,
1192                                         u16 buf_size, u16 timeout)
1193 {
1194         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1195         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1196         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1197         struct sk_buff *skb;
1198         struct ieee80211_mgmt *mgmt;
1199         u16 capab;
1200
1201         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1202
1203         if (!skb) {
1204                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1205                        "for addba resp frame\n", dev->name);
1206                 return;
1207         }
1208
1209         skb_reserve(skb, local->hw.extra_tx_headroom);
1210         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1211         memset(mgmt, 0, 24);
1212         memcpy(mgmt->da, da, ETH_ALEN);
1213         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1214         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1215                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1216         else
1217                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1218         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1219                                            IEEE80211_STYPE_ACTION);
1220
1221         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1222         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1223         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1224         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1225
1226         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1227         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1228         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1229
1230         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1231         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1232         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1233
1234         ieee80211_sta_tx(dev, skb, 0);
1235
1236         return;
1237 }
1238
1239 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1240                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1241                                 u16 agg_size, u16 timeout)
1242 {
1243         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1244         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1245         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1246         struct sk_buff *skb;
1247         struct ieee80211_mgmt *mgmt;
1248         u16 capab;
1249
1250         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1251
1252         if (!skb) {
1253                 printk(KERN_ERR "%s: failed to allocate buffer "
1254                                 "for addba request frame\n", dev->name);
1255                 return;
1256         }
1257         skb_reserve(skb, local->hw.extra_tx_headroom);
1258         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1259         memset(mgmt, 0, 24);
1260         memcpy(mgmt->da, da, ETH_ALEN);
1261         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1262         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1263                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1264         else
1265                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1266
1267         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1268                                         IEEE80211_STYPE_ACTION);
1269
1270         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1271
1272         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1273         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1274
1275         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1276         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1277         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1278         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1279
1280         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1281
1282         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1283         mgmt->u.action.u.addba_req.start_seq_num =
1284                                         cpu_to_le16(start_seq_num << 4);
1285
1286         ieee80211_sta_tx(dev, skb, 0);
1287 }
1288
1289 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1290                                                 struct ieee80211_mgmt *mgmt,
1291                                                 size_t len)
1292 {
1293         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1294         struct ieee80211_hw *hw = &local->hw;
1295         struct ieee80211_conf *conf = &hw->conf;
1296         struct sta_info *sta;
1297         struct tid_ampdu_rx *tid_agg_rx;
1298         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1299         u8 dialog_token;
1300         int ret = -EOPNOTSUPP;
1301         DECLARE_MAC_BUF(mac);
1302
1303         rcu_read_lock();
1304
1305         sta = sta_info_get(local, mgmt->sa);
1306         if (!sta) {
1307                 rcu_read_unlock();
1308                 return;
1309         }
1310
1311         /* extract session parameters from addba request frame */
1312         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1313         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1314         start_seq_num =
1315                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1316
1317         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1318         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1319         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1320         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1321
1322         status = WLAN_STATUS_REQUEST_DECLINED;
1323
1324         /* sanity check for incoming parameters:
1325          * check if configuration can support the BA policy
1326          * and if buffer size does not exceeds max value */
1327         if (((ba_policy != 1)
1328                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1329                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1330                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1331 #ifdef CONFIG_MAC80211_HT_DEBUG
1332                 if (net_ratelimit())
1333                         printk(KERN_DEBUG "AddBA Req with bad params from "
1334                                 "%s on tid %u. policy %d, buffer size %d\n",
1335                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1336                                 buf_size);
1337 #endif /* CONFIG_MAC80211_HT_DEBUG */
1338                 goto end_no_lock;
1339         }
1340         /* determine default buffer size */
1341         if (buf_size == 0) {
1342                 struct ieee80211_supported_band *sband;
1343
1344                 sband = local->hw.wiphy->bands[conf->channel->band];
1345                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1346                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1347         }
1348
1349
1350         /* examine state machine */
1351         spin_lock_bh(&sta->lock);
1352
1353         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1354 #ifdef CONFIG_MAC80211_HT_DEBUG
1355                 if (net_ratelimit())
1356                         printk(KERN_DEBUG "unexpected AddBA Req from "
1357                                 "%s on tid %u\n",
1358                                 print_mac(mac, mgmt->sa), tid);
1359 #endif /* CONFIG_MAC80211_HT_DEBUG */
1360                 goto end;
1361         }
1362
1363         /* prepare A-MPDU MLME for Rx aggregation */
1364         sta->ampdu_mlme.tid_rx[tid] =
1365                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1366         if (!sta->ampdu_mlme.tid_rx[tid]) {
1367 #ifdef CONFIG_MAC80211_HT_DEBUG
1368                 if (net_ratelimit())
1369                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1370                                         tid);
1371 #endif
1372                 goto end;
1373         }
1374         /* rx timer */
1375         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1376                                 sta_rx_agg_session_timer_expired;
1377         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1378                                 (unsigned long)&sta->timer_to_tid[tid];
1379         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1380
1381         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1382
1383         /* prepare reordering buffer */
1384         tid_agg_rx->reorder_buf =
1385                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1386         if (!tid_agg_rx->reorder_buf) {
1387 #ifdef CONFIG_MAC80211_HT_DEBUG
1388                 if (net_ratelimit())
1389                         printk(KERN_ERR "can not allocate reordering buffer "
1390                                "to tid %d\n", tid);
1391 #endif
1392                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1393                 goto end;
1394         }
1395         memset(tid_agg_rx->reorder_buf, 0,
1396                 buf_size * sizeof(struct sk_buff *));
1397
1398         if (local->ops->ampdu_action)
1399                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1400                                                sta->addr, tid, &start_seq_num);
1401 #ifdef CONFIG_MAC80211_HT_DEBUG
1402         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1403 #endif /* CONFIG_MAC80211_HT_DEBUG */
1404
1405         if (ret) {
1406                 kfree(tid_agg_rx->reorder_buf);
1407                 kfree(tid_agg_rx);
1408                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1409                 goto end;
1410         }
1411
1412         /* change state and send addba resp */
1413         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1414         tid_agg_rx->dialog_token = dialog_token;
1415         tid_agg_rx->ssn = start_seq_num;
1416         tid_agg_rx->head_seq_num = start_seq_num;
1417         tid_agg_rx->buf_size = buf_size;
1418         tid_agg_rx->timeout = timeout;
1419         tid_agg_rx->stored_mpdu_num = 0;
1420         status = WLAN_STATUS_SUCCESS;
1421 end:
1422         spin_unlock_bh(&sta->lock);
1423
1424 end_no_lock:
1425         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1426                                   dialog_token, status, 1, buf_size, timeout);
1427         rcu_read_unlock();
1428 }
1429
1430 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1431                                              struct ieee80211_mgmt *mgmt,
1432                                              size_t len)
1433 {
1434         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1435         struct ieee80211_hw *hw = &local->hw;
1436         struct sta_info *sta;
1437         u16 capab;
1438         u16 tid;
1439         u8 *state;
1440
1441         rcu_read_lock();
1442
1443         sta = sta_info_get(local, mgmt->sa);
1444         if (!sta) {
1445                 rcu_read_unlock();
1446                 return;
1447         }
1448
1449         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1450         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1451
1452         state = &sta->ampdu_mlme.tid_state_tx[tid];
1453
1454         spin_lock_bh(&sta->lock);
1455
1456         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1457                 spin_unlock_bh(&sta->lock);
1458                 goto addba_resp_exit;
1459         }
1460
1461         if (mgmt->u.action.u.addba_resp.dialog_token !=
1462                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1463                 spin_unlock_bh(&sta->lock);
1464 #ifdef CONFIG_MAC80211_HT_DEBUG
1465                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1466 #endif /* CONFIG_MAC80211_HT_DEBUG */
1467                 goto addba_resp_exit;
1468         }
1469
1470         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1471 #ifdef CONFIG_MAC80211_HT_DEBUG
1472         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1473 #endif /* CONFIG_MAC80211_HT_DEBUG */
1474         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1475                         == WLAN_STATUS_SUCCESS) {
1476                 *state |= HT_ADDBA_RECEIVED_MSK;
1477                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1478
1479                 if (*state == HT_AGG_STATE_OPERATIONAL)
1480                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1481
1482                 spin_unlock_bh(&sta->lock);
1483         } else {
1484                 sta->ampdu_mlme.addba_req_num[tid]++;
1485                 /* this will allow the state check in stop_BA_session */
1486                 *state = HT_AGG_STATE_OPERATIONAL;
1487                 spin_unlock_bh(&sta->lock);
1488                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1489                                              WLAN_BACK_INITIATOR);
1490         }
1491
1492 addba_resp_exit:
1493         rcu_read_unlock();
1494 }
1495
1496 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1497                           u16 initiator, u16 reason_code)
1498 {
1499         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1500         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1501         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1502         struct sk_buff *skb;
1503         struct ieee80211_mgmt *mgmt;
1504         u16 params;
1505
1506         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1507
1508         if (!skb) {
1509                 printk(KERN_ERR "%s: failed to allocate buffer "
1510                                         "for delba frame\n", dev->name);
1511                 return;
1512         }
1513
1514         skb_reserve(skb, local->hw.extra_tx_headroom);
1515         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1516         memset(mgmt, 0, 24);
1517         memcpy(mgmt->da, da, ETH_ALEN);
1518         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1519         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1520                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1521         else
1522                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1523         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1524                                         IEEE80211_STYPE_ACTION);
1525
1526         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1527
1528         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1529         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1530         params = (u16)(initiator << 11);        /* bit 11 initiator */
1531         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1532
1533         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1534         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1535
1536         ieee80211_sta_tx(dev, skb, 0);
1537 }
1538
1539 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1540                                         u16 initiator, u16 reason)
1541 {
1542         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1543         struct ieee80211_hw *hw = &local->hw;
1544         struct sta_info *sta;
1545         int ret, i;
1546         DECLARE_MAC_BUF(mac);
1547
1548         rcu_read_lock();
1549
1550         sta = sta_info_get(local, ra);
1551         if (!sta) {
1552                 rcu_read_unlock();
1553                 return;
1554         }
1555
1556         /* check if TID is in operational state */
1557         spin_lock_bh(&sta->lock);
1558         if (sta->ampdu_mlme.tid_state_rx[tid]
1559                                 != HT_AGG_STATE_OPERATIONAL) {
1560                 spin_unlock_bh(&sta->lock);
1561                 rcu_read_unlock();
1562                 return;
1563         }
1564         sta->ampdu_mlme.tid_state_rx[tid] =
1565                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1566                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1567         spin_unlock_bh(&sta->lock);
1568
1569         /* stop HW Rx aggregation. ampdu_action existence
1570          * already verified in session init so we add the BUG_ON */
1571         BUG_ON(!local->ops->ampdu_action);
1572
1573 #ifdef CONFIG_MAC80211_HT_DEBUG
1574         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1575                                 print_mac(mac, ra), tid);
1576 #endif /* CONFIG_MAC80211_HT_DEBUG */
1577
1578         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1579                                         ra, tid, NULL);
1580         if (ret)
1581                 printk(KERN_DEBUG "HW problem - can not stop rx "
1582                                 "aggregation for tid %d\n", tid);
1583
1584         /* shutdown timer has not expired */
1585         if (initiator != WLAN_BACK_TIMER)
1586                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1587
1588         /* check if this is a self generated aggregation halt */
1589         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1590                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1591
1592         /* free the reordering buffer */
1593         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1594                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1595                         /* release the reordered frames */
1596                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1597                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1598                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1599                 }
1600         }
1601         /* free resources */
1602         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1603         kfree(sta->ampdu_mlme.tid_rx[tid]);
1604         sta->ampdu_mlme.tid_rx[tid] = NULL;
1605         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1606
1607         rcu_read_unlock();
1608 }
1609
1610
1611 static void ieee80211_sta_process_delba(struct net_device *dev,
1612                         struct ieee80211_mgmt *mgmt, size_t len)
1613 {
1614         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1615         struct sta_info *sta;
1616         u16 tid, params;
1617         u16 initiator;
1618         DECLARE_MAC_BUF(mac);
1619
1620         rcu_read_lock();
1621
1622         sta = sta_info_get(local, mgmt->sa);
1623         if (!sta) {
1624                 rcu_read_unlock();
1625                 return;
1626         }
1627
1628         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1629         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1630         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1631
1632 #ifdef CONFIG_MAC80211_HT_DEBUG
1633         if (net_ratelimit())
1634                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1635                         print_mac(mac, mgmt->sa),
1636                         initiator ? "initiator" : "recipient", tid,
1637                         mgmt->u.action.u.delba.reason_code);
1638 #endif /* CONFIG_MAC80211_HT_DEBUG */
1639
1640         if (initiator == WLAN_BACK_INITIATOR)
1641                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1642                                                  WLAN_BACK_INITIATOR, 0);
1643         else { /* WLAN_BACK_RECIPIENT */
1644                 spin_lock_bh(&sta->lock);
1645                 sta->ampdu_mlme.tid_state_tx[tid] =
1646                                 HT_AGG_STATE_OPERATIONAL;
1647                 spin_unlock_bh(&sta->lock);
1648                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1649                                              WLAN_BACK_RECIPIENT);
1650         }
1651         rcu_read_unlock();
1652 }
1653
1654 /*
1655  * After sending add Block Ack request we activated a timer until
1656  * add Block Ack response will arrive from the recipient.
1657  * If this timer expires sta_addba_resp_timer_expired will be executed.
1658  */
1659 void sta_addba_resp_timer_expired(unsigned long data)
1660 {
1661         /* not an elegant detour, but there is no choice as the timer passes
1662          * only one argument, and both sta_info and TID are needed, so init
1663          * flow in sta_info_create gives the TID as data, while the timer_to_id
1664          * array gives the sta through container_of */
1665         u16 tid = *(u8 *)data;
1666         struct sta_info *temp_sta = container_of((void *)data,
1667                 struct sta_info, timer_to_tid[tid]);
1668
1669         struct ieee80211_local *local = temp_sta->local;
1670         struct ieee80211_hw *hw = &local->hw;
1671         struct sta_info *sta;
1672         u8 *state;
1673
1674         rcu_read_lock();
1675
1676         sta = sta_info_get(local, temp_sta->addr);
1677         if (!sta) {
1678                 rcu_read_unlock();
1679                 return;
1680         }
1681
1682         state = &sta->ampdu_mlme.tid_state_tx[tid];
1683         /* check if the TID waits for addBA response */
1684         spin_lock_bh(&sta->lock);
1685         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1686                 spin_unlock_bh(&sta->lock);
1687                 *state = HT_AGG_STATE_IDLE;
1688 #ifdef CONFIG_MAC80211_HT_DEBUG
1689                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1690                                 "expecting addBA response there", tid);
1691 #endif
1692                 goto timer_expired_exit;
1693         }
1694
1695 #ifdef CONFIG_MAC80211_HT_DEBUG
1696         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1697 #endif
1698
1699         /* go through the state check in stop_BA_session */
1700         *state = HT_AGG_STATE_OPERATIONAL;
1701         spin_unlock_bh(&sta->lock);
1702         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1703                                      WLAN_BACK_INITIATOR);
1704
1705 timer_expired_exit:
1706         rcu_read_unlock();
1707 }
1708
1709 /*
1710  * After accepting the AddBA Request we activated a timer,
1711  * resetting it after each frame that arrives from the originator.
1712  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1713  */
1714 static void sta_rx_agg_session_timer_expired(unsigned long data)
1715 {
1716         /* not an elegant detour, but there is no choice as the timer passes
1717          * only one argument, and various sta_info are needed here, so init
1718          * flow in sta_info_create gives the TID as data, while the timer_to_id
1719          * array gives the sta through container_of */
1720         u8 *ptid = (u8 *)data;
1721         u8 *timer_to_id = ptid - *ptid;
1722         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1723                                          timer_to_tid[0]);
1724
1725 #ifdef CONFIG_MAC80211_HT_DEBUG
1726         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1727 #endif
1728         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1729                                          (u16)*ptid, WLAN_BACK_TIMER,
1730                                          WLAN_REASON_QSTA_TIMEOUT);
1731 }
1732
1733 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1734 {
1735         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1736         int i;
1737
1738         for (i = 0; i <  STA_TID_NUM; i++) {
1739                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1740                                              WLAN_BACK_INITIATOR);
1741                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1742                                                  WLAN_BACK_RECIPIENT,
1743                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1744         }
1745 }
1746
1747 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1748                                         struct ieee80211_msrment_ie *request_ie,
1749                                         const u8 *da, const u8 *bssid,
1750                                         u8 dialog_token)
1751 {
1752         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1753         struct sk_buff *skb;
1754         struct ieee80211_mgmt *msr_report;
1755
1756         skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1757                                 sizeof(struct ieee80211_msrment_ie));
1758
1759         if (!skb) {
1760                 printk(KERN_ERR "%s: failed to allocate buffer for "
1761                                 "measurement report frame\n", dev->name);
1762                 return;
1763         }
1764
1765         skb_reserve(skb, local->hw.extra_tx_headroom);
1766         msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1767         memset(msr_report, 0, 24);
1768         memcpy(msr_report->da, da, ETH_ALEN);
1769         memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1770         memcpy(msr_report->bssid, bssid, ETH_ALEN);
1771         msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1772                                                 IEEE80211_STYPE_ACTION);
1773
1774         skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1775         msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1776         msr_report->u.action.u.measurement.action_code =
1777                                 WLAN_ACTION_SPCT_MSR_RPRT;
1778         msr_report->u.action.u.measurement.dialog_token = dialog_token;
1779
1780         msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1781         msr_report->u.action.u.measurement.length =
1782                         sizeof(struct ieee80211_msrment_ie);
1783
1784         memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1785                 sizeof(struct ieee80211_msrment_ie));
1786         msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1787         msr_report->u.action.u.measurement.msr_elem.mode |=
1788                         IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1789         msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1790
1791         ieee80211_sta_tx(dev, skb, 0);
1792 }
1793
1794 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1795                                                 struct ieee80211_mgmt *mgmt,
1796                                                 size_t len)
1797 {
1798         /*
1799          * Ignoring measurement request is spec violation.
1800          * Mandatory measurements must be reported optional
1801          * measurements might be refused or reported incapable
1802          * For now just refuse
1803          * TODO: Answer basic measurement as unmeasured
1804          */
1805         ieee80211_send_refuse_measurement_request(dev,
1806                         &mgmt->u.action.u.measurement.msr_elem,
1807                         mgmt->sa, mgmt->bssid,
1808                         mgmt->u.action.u.measurement.dialog_token);
1809 }
1810
1811
1812 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1813                                    struct ieee80211_if_sta *ifsta,
1814                                    struct ieee80211_mgmt *mgmt,
1815                                    size_t len)
1816 {
1817         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1818         u16 auth_alg, auth_transaction, status_code;
1819         DECLARE_MAC_BUF(mac);
1820
1821         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1822             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1823                 return;
1824
1825         if (len < 24 + 6)
1826                 return;
1827
1828         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1829             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1830                 return;
1831
1832         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1833             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1834                 return;
1835
1836         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1837         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1838         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1839
1840         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1841                 /*
1842                  * IEEE 802.11 standard does not require authentication in IBSS
1843                  * networks and most implementations do not seem to use it.
1844                  * However, try to reply to authentication attempts if someone
1845                  * has actually implemented this.
1846                  */
1847                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1848                         return;
1849                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1850         }
1851
1852         if (auth_alg != ifsta->auth_alg ||
1853             auth_transaction != ifsta->auth_transaction)
1854                 return;
1855
1856         if (status_code != WLAN_STATUS_SUCCESS) {
1857                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1858                         u8 algs[3];
1859                         const int num_algs = ARRAY_SIZE(algs);
1860                         int i, pos;
1861                         algs[0] = algs[1] = algs[2] = 0xff;
1862                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1863                                 algs[0] = WLAN_AUTH_OPEN;
1864                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1865                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1866                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1867                                 algs[2] = WLAN_AUTH_LEAP;
1868                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1869                                 pos = 0;
1870                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1871                                 pos = 1;
1872                         else
1873                                 pos = 2;
1874                         for (i = 0; i < num_algs; i++) {
1875                                 pos++;
1876                                 if (pos >= num_algs)
1877                                         pos = 0;
1878                                 if (algs[pos] == ifsta->auth_alg ||
1879                                     algs[pos] == 0xff)
1880                                         continue;
1881                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1882                                     !ieee80211_sta_wep_configured(dev))
1883                                         continue;
1884                                 ifsta->auth_alg = algs[pos];
1885                                 break;
1886                         }
1887                 }
1888                 return;
1889         }
1890
1891         switch (ifsta->auth_alg) {
1892         case WLAN_AUTH_OPEN:
1893         case WLAN_AUTH_LEAP:
1894                 ieee80211_auth_completed(dev, ifsta);
1895                 break;
1896         case WLAN_AUTH_SHARED_KEY:
1897                 if (ifsta->auth_transaction == 4)
1898                         ieee80211_auth_completed(dev, ifsta);
1899                 else
1900                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1901                 break;
1902         }
1903 }
1904
1905
1906 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1907                                      struct ieee80211_if_sta *ifsta,
1908                                      struct ieee80211_mgmt *mgmt,
1909                                      size_t len)
1910 {
1911         u16 reason_code;
1912         DECLARE_MAC_BUF(mac);
1913
1914         if (len < 24 + 2)
1915                 return;
1916
1917         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1918                 return;
1919
1920         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1921
1922         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1923                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1924
1925         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1926             ifsta->state == IEEE80211_ASSOCIATE ||
1927             ifsta->state == IEEE80211_ASSOCIATED) {
1928                 ifsta->state = IEEE80211_AUTHENTICATE;
1929                 mod_timer(&ifsta->timer, jiffies +
1930                                       IEEE80211_RETRY_AUTH_INTERVAL);
1931         }
1932
1933         ieee80211_set_disassoc(dev, ifsta, 1);
1934         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1935 }
1936
1937
1938 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1939                                        struct ieee80211_if_sta *ifsta,
1940                                        struct ieee80211_mgmt *mgmt,
1941                                        size_t len)
1942 {
1943         u16 reason_code;
1944         DECLARE_MAC_BUF(mac);
1945
1946         if (len < 24 + 2)
1947                 return;
1948
1949         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1950                 return;
1951
1952         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1953
1954         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1955                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1956
1957         if (ifsta->state == IEEE80211_ASSOCIATED) {
1958                 ifsta->state = IEEE80211_ASSOCIATE;
1959                 mod_timer(&ifsta->timer, jiffies +
1960                                       IEEE80211_RETRY_AUTH_INTERVAL);
1961         }
1962
1963         ieee80211_set_disassoc(dev, ifsta, 0);
1964 }
1965
1966
1967 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1968                                          struct ieee80211_if_sta *ifsta,
1969                                          struct ieee80211_mgmt *mgmt,
1970                                          size_t len,
1971                                          int reassoc)
1972 {
1973         struct ieee80211_local *local = sdata->local;
1974         struct net_device *dev = sdata->dev;
1975         struct ieee80211_supported_band *sband;
1976         struct sta_info *sta;
1977         u64 rates, basic_rates;
1978         u16 capab_info, status_code, aid;
1979         struct ieee802_11_elems elems;
1980         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1981         u8 *pos;
1982         int i, j;
1983         DECLARE_MAC_BUF(mac);
1984         bool have_higher_than_11mbit = false;
1985
1986         /* AssocResp and ReassocResp have identical structure, so process both
1987          * of them in this function. */
1988
1989         if (ifsta->state != IEEE80211_ASSOCIATE)
1990                 return;
1991
1992         if (len < 24 + 6)
1993                 return;
1994
1995         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1996                 return;
1997
1998         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1999         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2000         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2001
2002         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2003                "status=%d aid=%d)\n",
2004                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2005                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2006
2007         if (status_code != WLAN_STATUS_SUCCESS) {
2008                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2009                        dev->name, status_code);
2010                 /* if this was a reassociation, ensure we try a "full"
2011                  * association next time. This works around some broken APs
2012                  * which do not correctly reject reassociation requests. */
2013                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2014                 return;
2015         }
2016
2017         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2018                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2019                        "set\n", dev->name, aid);
2020         aid &= ~(BIT(15) | BIT(14));
2021
2022         pos = mgmt->u.assoc_resp.variable;
2023         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2024
2025         if (!elems.supp_rates) {
2026                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2027                        dev->name);
2028                 return;
2029         }
2030
2031         printk(KERN_DEBUG "%s: associated\n", dev->name);
2032         ifsta->aid = aid;
2033         ifsta->ap_capab = capab_info;
2034
2035         kfree(ifsta->assocresp_ies);
2036         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2037         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2038         if (ifsta->assocresp_ies)
2039                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2040
2041         rcu_read_lock();
2042
2043         /* Add STA entry for the AP */
2044         sta = sta_info_get(local, ifsta->bssid);
2045         if (!sta) {
2046                 struct ieee80211_sta_bss *bss;
2047                 int err;
2048
2049                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2050                 if (!sta) {
2051                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2052                                " the AP\n", dev->name);
2053                         rcu_read_unlock();
2054                         return;
2055                 }
2056                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2057                                            local->hw.conf.channel->center_freq,
2058                                            ifsta->ssid, ifsta->ssid_len);
2059                 if (bss) {
2060                         sta->last_signal = bss->signal;
2061                         sta->last_qual = bss->qual;
2062                         sta->last_noise = bss->noise;
2063                         ieee80211_rx_bss_put(dev, bss);
2064                 }
2065
2066                 err = sta_info_insert(sta);
2067                 if (err) {
2068                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2069                                " the AP (error %d)\n", dev->name, err);
2070                         rcu_read_unlock();
2071                         return;
2072                 }
2073         }
2074
2075         /*
2076          * FIXME: Do we really need to update the sta_info's information here?
2077          *        We already know about the AP (we found it in our list) so it
2078          *        should already be filled with the right info, no?
2079          *        As is stands, all this is racy because typically we assume
2080          *        the information that is filled in here (except flags) doesn't
2081          *        change while a STA structure is alive. As such, it should move
2082          *        to between the sta_info_alloc() and sta_info_insert() above.
2083          */
2084
2085         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2086                            WLAN_STA_AUTHORIZED);
2087
2088         rates = 0;
2089         basic_rates = 0;
2090         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2091
2092         for (i = 0; i < elems.supp_rates_len; i++) {
2093                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2094
2095                 if (rate > 110)
2096                         have_higher_than_11mbit = true;
2097
2098                 for (j = 0; j < sband->n_bitrates; j++) {
2099                         if (sband->bitrates[j].bitrate == rate)
2100                                 rates |= BIT(j);
2101                         if (elems.supp_rates[i] & 0x80)
2102                                 basic_rates |= BIT(j);
2103                 }
2104         }
2105
2106         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2107                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2108
2109                 if (rate > 110)
2110                         have_higher_than_11mbit = true;
2111
2112                 for (j = 0; j < sband->n_bitrates; j++) {
2113                         if (sband->bitrates[j].bitrate == rate)
2114                                 rates |= BIT(j);
2115                         if (elems.ext_supp_rates[i] & 0x80)
2116                                 basic_rates |= BIT(j);
2117                 }
2118         }
2119
2120         sta->supp_rates[local->hw.conf.channel->band] = rates;
2121         sdata->basic_rates = basic_rates;
2122
2123         /* cf. IEEE 802.11 9.2.12 */
2124         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2125             have_higher_than_11mbit)
2126                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2127         else
2128                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2129
2130         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2131             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2132                 struct ieee80211_ht_bss_info bss_info;
2133                 ieee80211_ht_cap_ie_to_ht_info(
2134                                 (struct ieee80211_ht_cap *)
2135                                 elems.ht_cap_elem, &sta->ht_info);
2136                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2137                                 (struct ieee80211_ht_addt_info *)
2138                                 elems.ht_info_elem, &bss_info);
2139                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2140         }
2141
2142         rate_control_rate_init(sta, local);
2143
2144         if (elems.wmm_param) {
2145                 set_sta_flags(sta, WLAN_STA_WME);
2146                 rcu_read_unlock();
2147                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2148                                          elems.wmm_param_len);
2149         } else
2150                 rcu_read_unlock();
2151
2152         /* set AID and assoc capability,
2153          * ieee80211_set_associated() will tell the driver */
2154         bss_conf->aid = aid;
2155         bss_conf->assoc_capability = capab_info;
2156         ieee80211_set_associated(dev, ifsta, 1);
2157
2158         ieee80211_associated(dev, ifsta);
2159 }
2160
2161
2162 /* Caller must hold local->sta_bss_lock */
2163 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2164                                         struct ieee80211_sta_bss *bss)
2165 {
2166         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2167         u8 hash_idx;
2168
2169         if (bss_mesh_cfg(bss))
2170                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2171                                         bss_mesh_id_len(bss));
2172         else
2173                 hash_idx = STA_HASH(bss->bssid);
2174
2175         bss->hnext = local->sta_bss_hash[hash_idx];
2176         local->sta_bss_hash[hash_idx] = bss;
2177 }
2178
2179
2180 /* Caller must hold local->sta_bss_lock */
2181 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2182                                         struct ieee80211_sta_bss *bss)
2183 {
2184         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2185         struct ieee80211_sta_bss *b, *prev = NULL;
2186         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2187         while (b) {
2188                 if (b == bss) {
2189                         if (!prev)
2190                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2191                                         bss->hnext;
2192                         else
2193                                 prev->hnext = bss->hnext;
2194                         break;
2195                 }
2196                 prev = b;
2197                 b = b->hnext;
2198         }
2199 }
2200
2201
2202 static struct ieee80211_sta_bss *
2203 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2204                      u8 *ssid, u8 ssid_len)
2205 {
2206         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2207         struct ieee80211_sta_bss *bss;
2208
2209         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2210         if (!bss)
2211                 return NULL;
2212         atomic_inc(&bss->users);
2213         atomic_inc(&bss->users);
2214         memcpy(bss->bssid, bssid, ETH_ALEN);
2215         bss->freq = freq;
2216         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2217                 memcpy(bss->ssid, ssid, ssid_len);
2218                 bss->ssid_len = ssid_len;
2219         }
2220
2221         spin_lock_bh(&local->sta_bss_lock);
2222         /* TODO: order by RSSI? */
2223         list_add_tail(&bss->list, &local->sta_bss_list);
2224         __ieee80211_rx_bss_hash_add(dev, bss);
2225         spin_unlock_bh(&local->sta_bss_lock);
2226         return bss;
2227 }
2228
2229 static struct ieee80211_sta_bss *
2230 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2231                      u8 *ssid, u8 ssid_len)
2232 {
2233         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2234         struct ieee80211_sta_bss *bss;
2235
2236         spin_lock_bh(&local->sta_bss_lock);
2237         bss = local->sta_bss_hash[STA_HASH(bssid)];
2238         while (bss) {
2239                 if (!bss_mesh_cfg(bss) &&
2240                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2241                     bss->freq == freq &&
2242                     bss->ssid_len == ssid_len &&
2243                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2244                         atomic_inc(&bss->users);
2245                         break;
2246                 }
2247                 bss = bss->hnext;
2248         }
2249         spin_unlock_bh(&local->sta_bss_lock);
2250         return bss;
2251 }
2252
2253 #ifdef CONFIG_MAC80211_MESH
2254 static struct ieee80211_sta_bss *
2255 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2256                           u8 *mesh_cfg, int freq)
2257 {
2258         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2259         struct ieee80211_sta_bss *bss;
2260
2261         spin_lock_bh(&local->sta_bss_lock);
2262         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2263         while (bss) {
2264                 if (bss_mesh_cfg(bss) &&
2265                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2266                     bss->freq == freq &&
2267                     mesh_id_len == bss->mesh_id_len &&
2268                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2269                                                  mesh_id_len))) {
2270                         atomic_inc(&bss->users);
2271                         break;
2272                 }
2273                 bss = bss->hnext;
2274         }
2275         spin_unlock_bh(&local->sta_bss_lock);
2276         return bss;
2277 }
2278
2279 static struct ieee80211_sta_bss *
2280 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2281                           u8 *mesh_cfg, int mesh_config_len, int freq)
2282 {
2283         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2284         struct ieee80211_sta_bss *bss;
2285
2286         if (mesh_config_len != MESH_CFG_LEN)
2287                 return NULL;
2288
2289         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2290         if (!bss)
2291                 return NULL;
2292
2293         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2294         if (!bss->mesh_cfg) {
2295                 kfree(bss);
2296                 return NULL;
2297         }
2298
2299         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2300                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2301                 if (!bss->mesh_id) {
2302                         kfree(bss->mesh_cfg);
2303                         kfree(bss);
2304                         return NULL;
2305                 }
2306                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2307         }
2308
2309         atomic_inc(&bss->users);
2310         atomic_inc(&bss->users);
2311         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2312         bss->mesh_id_len = mesh_id_len;
2313         bss->freq = freq;
2314         spin_lock_bh(&local->sta_bss_lock);
2315         /* TODO: order by RSSI? */
2316         list_add_tail(&bss->list, &local->sta_bss_list);
2317         __ieee80211_rx_bss_hash_add(dev, bss);
2318         spin_unlock_bh(&local->sta_bss_lock);
2319         return bss;
2320 }
2321 #endif
2322
2323 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2324 {
2325         kfree(bss->wpa_ie);
2326         kfree(bss->rsn_ie);
2327         kfree(bss->wmm_ie);
2328         kfree(bss->ht_ie);
2329         kfree(bss->ht_add_ie);
2330         kfree(bss_mesh_id(bss));
2331         kfree(bss_mesh_cfg(bss));
2332         kfree(bss);
2333 }
2334
2335
2336 static void ieee80211_rx_bss_put(struct net_device *dev,
2337                                  struct ieee80211_sta_bss *bss)
2338 {
2339         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2340
2341         local_bh_disable();
2342         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2343                 local_bh_enable();
2344                 return;
2345         }
2346
2347         __ieee80211_rx_bss_hash_del(dev, bss);
2348         list_del(&bss->list);
2349         spin_unlock_bh(&local->sta_bss_lock);
2350         ieee80211_rx_bss_free(bss);
2351 }
2352
2353
2354 void ieee80211_rx_bss_list_init(struct net_device *dev)
2355 {
2356         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2357         spin_lock_init(&local->sta_bss_lock);
2358         INIT_LIST_HEAD(&local->sta_bss_list);
2359 }
2360
2361
2362 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2363 {
2364         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2365         struct ieee80211_sta_bss *bss, *tmp;
2366
2367         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2368                 ieee80211_rx_bss_put(dev, bss);
2369 }
2370
2371
2372 static int ieee80211_sta_join_ibss(struct net_device *dev,
2373                                    struct ieee80211_if_sta *ifsta,
2374                                    struct ieee80211_sta_bss *bss)
2375 {
2376         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2377         int res, rates, i, j;
2378         struct sk_buff *skb;
2379         struct ieee80211_mgmt *mgmt;
2380         struct ieee80211_tx_info *control;
2381         struct rate_selection ratesel;
2382         u8 *pos;
2383         struct ieee80211_sub_if_data *sdata;
2384         struct ieee80211_supported_band *sband;
2385         union iwreq_data wrqu;
2386
2387         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2388
2389         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2390
2391         /* Remove possible STA entries from other IBSS networks. */
2392         sta_info_flush_delayed(sdata);
2393
2394         if (local->ops->reset_tsf) {
2395                 /* Reset own TSF to allow time synchronization work. */
2396                 local->ops->reset_tsf(local_to_hw(local));
2397         }
2398         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2399         res = ieee80211_if_config(dev);
2400         if (res)
2401                 return res;
2402
2403         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2404
2405         sdata->drop_unencrypted = bss->capability &
2406                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2407
2408         res = ieee80211_set_freq(dev, bss->freq);
2409
2410         if (res)
2411                 return res;
2412
2413         /* Set beacon template */
2414         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2415         do {
2416                 if (!skb)
2417                         break;
2418
2419                 skb_reserve(skb, local->hw.extra_tx_headroom);
2420
2421                 mgmt = (struct ieee80211_mgmt *)
2422                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2423                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2424                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2425                                                    IEEE80211_STYPE_BEACON);
2426                 memset(mgmt->da, 0xff, ETH_ALEN);
2427                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2428                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2429                 mgmt->u.beacon.beacon_int =
2430                         cpu_to_le16(local->hw.conf.beacon_int);
2431                 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2432                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2433
2434                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2435                 *pos++ = WLAN_EID_SSID;
2436                 *pos++ = ifsta->ssid_len;
2437                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2438
2439                 rates = bss->supp_rates_len;
2440                 if (rates > 8)
2441                         rates = 8;
2442                 pos = skb_put(skb, 2 + rates);
2443                 *pos++ = WLAN_EID_SUPP_RATES;
2444                 *pos++ = rates;
2445                 memcpy(pos, bss->supp_rates, rates);
2446
2447                 if (bss->band == IEEE80211_BAND_2GHZ) {
2448                         pos = skb_put(skb, 2 + 1);
2449                         *pos++ = WLAN_EID_DS_PARAMS;
2450                         *pos++ = 1;
2451                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2452                 }
2453
2454                 pos = skb_put(skb, 2 + 2);
2455                 *pos++ = WLAN_EID_IBSS_PARAMS;
2456                 *pos++ = 2;
2457                 /* FIX: set ATIM window based on scan results */
2458                 *pos++ = 0;
2459                 *pos++ = 0;
2460
2461                 if (bss->supp_rates_len > 8) {
2462                         rates = bss->supp_rates_len - 8;
2463                         pos = skb_put(skb, 2 + rates);
2464                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2465                         *pos++ = rates;
2466                         memcpy(pos, &bss->supp_rates[8], rates);
2467                 }
2468
2469                 control = IEEE80211_SKB_CB(skb);
2470
2471                 rate_control_get_rate(dev, sband, skb, &ratesel);
2472                 if (ratesel.rate_idx < 0) {
2473                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2474                                "for IBSS beacon\n", dev->name);
2475                         break;
2476                 }
2477                 control->control.vif = &sdata->vif;
2478                 control->tx_rate_idx = ratesel.rate_idx;
2479                 if (sdata->bss_conf.use_short_preamble &&
2480                     sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2481                         control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2482                 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2483                 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2484                 control->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
2485                 control->control.retry_limit = 1;
2486
2487                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2488                 if (ifsta->probe_resp) {
2489                         mgmt = (struct ieee80211_mgmt *)
2490                                 ifsta->probe_resp->data;
2491                         mgmt->frame_control =
2492                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2493                                              IEEE80211_STYPE_PROBE_RESP);
2494                 } else {
2495                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2496                                "template for IBSS\n", dev->name);
2497                 }
2498
2499                 if (local->ops->beacon_update &&
2500                     local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2501                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2502                                "template\n", dev->name);
2503                         skb = NULL;
2504                 }
2505
2506                 rates = 0;
2507                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2508                 for (i = 0; i < bss->supp_rates_len; i++) {
2509                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2510                         for (j = 0; j < sband->n_bitrates; j++)
2511                                 if (sband->bitrates[j].bitrate == bitrate)
2512                                         rates |= BIT(j);
2513                 }
2514                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2515
2516                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2517         } while (0);
2518
2519         if (skb) {
2520                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2521                        "template\n", dev->name);
2522                 dev_kfree_skb(skb);
2523         }
2524
2525         ifsta->state = IEEE80211_IBSS_JOINED;
2526         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2527
2528         memset(&wrqu, 0, sizeof(wrqu));
2529         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2530         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2531
2532         return res;
2533 }
2534
2535 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2536                             struct ieee802_11_elems *elems,
2537                             enum ieee80211_band band)
2538 {
2539         struct ieee80211_supported_band *sband;
2540         struct ieee80211_rate *bitrates;
2541         size_t num_rates;
2542         u64 supp_rates;
2543         int i, j;
2544         sband = local->hw.wiphy->bands[band];
2545
2546         if (!sband) {
2547                 WARN_ON(1);
2548                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2549         }
2550
2551         bitrates = sband->bitrates;
2552         num_rates = sband->n_bitrates;
2553         supp_rates = 0;
2554         for (i = 0; i < elems->supp_rates_len +
2555                      elems->ext_supp_rates_len; i++) {
2556                 u8 rate = 0;
2557                 int own_rate;
2558                 if (i < elems->supp_rates_len)
2559                         rate = elems->supp_rates[i];
2560                 else if (elems->ext_supp_rates)
2561                         rate = elems->ext_supp_rates
2562                                 [i - elems->supp_rates_len];
2563                 own_rate = 5 * (rate & 0x7f);
2564                 for (j = 0; j < num_rates; j++)
2565                         if (bitrates[j].bitrate == own_rate)
2566                                 supp_rates |= BIT(j);
2567         }
2568         return supp_rates;
2569 }
2570
2571
2572 static void ieee80211_rx_bss_info(struct net_device *dev,
2573                                   struct ieee80211_mgmt *mgmt,
2574                                   size_t len,
2575                                   struct ieee80211_rx_status *rx_status,
2576                                   struct ieee802_11_elems *elems,
2577                                   int beacon)
2578 {
2579         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2580         int freq, clen;
2581         struct ieee80211_sta_bss *bss;
2582         struct sta_info *sta;
2583         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2584         u64 beacon_timestamp, rx_timestamp;
2585         struct ieee80211_channel *channel;
2586         DECLARE_MAC_BUF(mac);
2587         DECLARE_MAC_BUF(mac2);
2588
2589         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2590                 return; /* ignore ProbeResp to foreign address */
2591
2592         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2593
2594         if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2595             elems->mesh_config && mesh_matches_local(elems, dev)) {
2596                 u64 rates = ieee80211_sta_get_rates(local, elems,
2597                                                 rx_status->band);
2598
2599                 mesh_neighbour_update(mgmt->sa, rates, dev,
2600                                       mesh_peer_accepts_plinks(elems, dev));
2601         }
2602
2603         rcu_read_lock();
2604
2605         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2606             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2607             (sta = sta_info_get(local, mgmt->sa))) {
2608                 u64 prev_rates;
2609                 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2610                                                         rx_status->band);
2611
2612                 prev_rates = sta->supp_rates[rx_status->band];
2613                 sta->supp_rates[rx_status->band] &= supp_rates;
2614                 if (sta->supp_rates[rx_status->band] == 0) {
2615                         /* No matching rates - this should not really happen.
2616                          * Make sure that at least one rate is marked
2617                          * supported to avoid issues with TX rate ctrl. */
2618                         sta->supp_rates[rx_status->band] =
2619                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2620                 }
2621         }
2622
2623         rcu_read_unlock();
2624
2625         if (elems->ds_params && elems->ds_params_len == 1)
2626                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2627         else
2628                 freq = rx_status->freq;
2629
2630         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2631
2632         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2633                 return;
2634
2635 #ifdef CONFIG_MAC80211_MESH
2636         if (elems->mesh_config)
2637                 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2638                                 elems->mesh_id_len, elems->mesh_config, freq);
2639         else
2640 #endif
2641                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2642                                            elems->ssid, elems->ssid_len);
2643         if (!bss) {
2644 #ifdef CONFIG_MAC80211_MESH
2645                 if (elems->mesh_config)
2646                         bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2647                                 elems->mesh_id_len, elems->mesh_config,
2648                                 elems->mesh_config_len, freq);
2649                 else
2650 #endif
2651                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2652                                                   elems->ssid, elems->ssid_len);
2653                 if (!bss)
2654                         return;
2655         } else {
2656 #if 0
2657                 /* TODO: order by RSSI? */
2658                 spin_lock_bh(&local->sta_bss_lock);
2659                 list_move_tail(&bss->list, &local->sta_bss_list);
2660                 spin_unlock_bh(&local->sta_bss_lock);
2661 #endif
2662         }
2663
2664         /* save the ERP value so that it is available at association time */
2665         if (elems->erp_info && elems->erp_info_len >= 1) {
2666                 bss->erp_value = elems->erp_info[0];
2667                 bss->has_erp_value = 1;
2668         }
2669
2670         if (elems->ht_cap_elem &&
2671              (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2672              memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2673                 kfree(bss->ht_ie);
2674                 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2675                 if (bss->ht_ie) {
2676                         memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2677                                 elems->ht_cap_elem_len + 2);
2678                         bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2679                 } else
2680                         bss->ht_ie_len = 0;
2681         } else if (!elems->ht_cap_elem && bss->ht_ie) {
2682                 kfree(bss->ht_ie);
2683                 bss->ht_ie = NULL;
2684                 bss->ht_ie_len = 0;
2685         }
2686
2687         if (elems->ht_info_elem &&
2688              (!bss->ht_add_ie ||
2689              bss->ht_add_ie_len != elems->ht_info_elem_len ||
2690              memcmp(bss->ht_add_ie, elems->ht_info_elem,
2691                         elems->ht_info_elem_len))) {
2692                 kfree(bss->ht_add_ie);
2693                 bss->ht_add_ie =
2694                         kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2695                 if (bss->ht_add_ie) {
2696                         memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2697                                 elems->ht_info_elem_len + 2);
2698                         bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2699                 } else
2700                         bss->ht_add_ie_len = 0;
2701         } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2702                 kfree(bss->ht_add_ie);
2703                 bss->ht_add_ie = NULL;
2704                 bss->ht_add_ie_len = 0;
2705         }
2706
2707         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2708         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2709
2710         bss->supp_rates_len = 0;
2711         if (elems->supp_rates) {
2712                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2713                 if (clen > elems->supp_rates_len)
2714                         clen = elems->supp_rates_len;
2715                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2716                        clen);
2717                 bss->supp_rates_len += clen;
2718         }
2719         if (elems->ext_supp_rates) {
2720                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2721                 if (clen > elems->ext_supp_rates_len)
2722                         clen = elems->ext_supp_rates_len;
2723                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2724                        elems->ext_supp_rates, clen);
2725                 bss->supp_rates_len += clen;
2726         }
2727
2728         bss->band = rx_status->band;
2729
2730         bss->timestamp = beacon_timestamp;
2731         bss->last_update = jiffies;
2732         bss->signal = rx_status->signal;
2733         bss->noise = rx_status->noise;
2734         bss->qual = rx_status->qual;
2735         if (!beacon && !bss->probe_resp)
2736                 bss->probe_resp = true;
2737
2738         /*
2739          * In STA mode, the remaining parameters should not be overridden
2740          * by beacons because they're not necessarily accurate there.
2741          */
2742         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2743             bss->probe_resp && beacon) {
2744                 ieee80211_rx_bss_put(dev, bss);
2745                 return;
2746         }
2747
2748         if (elems->wpa &&
2749             (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2750              memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2751                 kfree(bss->wpa_ie);
2752                 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2753                 if (bss->wpa_ie) {
2754                         memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2755                         bss->wpa_ie_len = elems->wpa_len + 2;
2756                 } else
2757                         bss->wpa_ie_len = 0;
2758         } else if (!elems->wpa && bss->wpa_ie) {
2759                 kfree(bss->wpa_ie);
2760                 bss->wpa_ie = NULL;
2761                 bss->wpa_ie_len = 0;
2762         }
2763
2764         if (elems->rsn &&
2765             (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2766              memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2767                 kfree(bss->rsn_ie);
2768                 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2769                 if (bss->rsn_ie) {
2770                         memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2771                         bss->rsn_ie_len = elems->rsn_len + 2;
2772                 } else
2773                         bss->rsn_ie_len = 0;
2774         } else if (!elems->rsn && bss->rsn_ie) {
2775                 kfree(bss->rsn_ie);
2776                 bss->rsn_ie = NULL;
2777                 bss->rsn_ie_len = 0;
2778         }
2779
2780         /*
2781          * Cf.
2782          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2783          *
2784          * quoting:
2785          *
2786          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2787          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2788          * Alliance (September 1, 2004) is incorporated by reference herein.
2789          * The inclusion of the WMM Parameters in probe responses and
2790          * association responses is mandatory for WMM enabled networks. The
2791          * inclusion of the WMM Parameters in beacons, however, is optional.
2792          */
2793
2794         if (elems->wmm_param &&
2795             (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2796              memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2797                 kfree(bss->wmm_ie);
2798                 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2799                 if (bss->wmm_ie) {
2800                         memcpy(bss->wmm_ie, elems->wmm_param - 2,
2801                                elems->wmm_param_len + 2);
2802                         bss->wmm_ie_len = elems->wmm_param_len + 2;
2803                 } else
2804                         bss->wmm_ie_len = 0;
2805         } else if (elems->wmm_info &&
2806                     (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2807                      memcmp(bss->wmm_ie, elems->wmm_info,
2808                                                 elems->wmm_info_len))) {
2809                  /* As for certain AP's Fifth bit is not set in WMM IE in
2810                   * beacon frames.So while parsing the beacon frame the
2811                   * wmm_info structure is used instead of wmm_param.
2812                   * wmm_info structure was never used to set bss->wmm_ie.
2813                   * This code fixes this problem by copying the WME
2814                   * information from wmm_info to bss->wmm_ie and enabling
2815                   * n-band association.
2816                   */
2817                 kfree(bss->wmm_ie);
2818                 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2819                 if (bss->wmm_ie) {
2820                         memcpy(bss->wmm_ie, elems->wmm_info - 2,
2821                                elems->wmm_info_len + 2);
2822                         bss->wmm_ie_len = elems->wmm_info_len + 2;
2823                 } else
2824                         bss->wmm_ie_len = 0;
2825         } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2826                 kfree(bss->wmm_ie);
2827                 bss->wmm_ie = NULL;
2828                 bss->wmm_ie_len = 0;
2829         }
2830
2831         /* check if we need to merge IBSS */
2832         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2833             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2834             bss->capability & WLAN_CAPABILITY_IBSS &&
2835             bss->freq == local->oper_channel->center_freq &&
2836             elems->ssid_len == sdata->u.sta.ssid_len &&
2837             memcmp(elems->ssid, sdata->u.sta.ssid,
2838                                 sdata->u.sta.ssid_len) == 0) {
2839                 if (rx_status->flag & RX_FLAG_TSFT) {
2840                         /* in order for correct IBSS merging we need mactime
2841                          *
2842                          * since mactime is defined as the time the first data
2843                          * symbol of the frame hits the PHY, and the timestamp
2844                          * of the beacon is defined as "the time that the data
2845                          * symbol containing the first bit of the timestamp is
2846                          * transmitted to the PHY plus the transmitting STA’s
2847                          * delays through its local PHY from the MAC-PHY
2848                          * interface to its interface with the WM"
2849                          * (802.11 11.1.2) - equals the time this bit arrives at
2850                          * the receiver - we have to take into account the
2851                          * offset between the two.
2852                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2853                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2854                          */
2855                         int rate = local->hw.wiphy->bands[rx_status->band]->
2856                                         bitrates[rx_status->rate_idx].bitrate;
2857                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2858                 } else if (local && local->ops && local->ops->get_tsf)
2859                         /* second best option: get current TSF */
2860                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2861                 else
2862                         /* can't merge without knowing the TSF */
2863                         rx_timestamp = -1LLU;
2864 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2865                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2866                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2867                        print_mac(mac, mgmt->sa),
2868                        print_mac(mac2, mgmt->bssid),
2869                        (unsigned long long)rx_timestamp,
2870                        (unsigned long long)beacon_timestamp,
2871                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2872                        jiffies);
2873 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2874                 if (beacon_timestamp > rx_timestamp) {
2875 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2876                         printk(KERN_DEBUG "%s: beacon TSF higher than "
2877                                "local TSF - IBSS merge with BSSID %s\n",
2878                                dev->name, print_mac(mac, mgmt->bssid));
2879 #endif
2880                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2881                         ieee80211_ibss_add_sta(dev, NULL,
2882                                                mgmt->bssid, mgmt->sa,
2883                                                BIT(rx_status->rate_idx));
2884                 }
2885         }
2886
2887         ieee80211_rx_bss_put(dev, bss);
2888 }
2889
2890
2891 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2892                                          struct ieee80211_mgmt *mgmt,
2893                                          size_t len,
2894                                          struct ieee80211_rx_status *rx_status)
2895 {
2896         size_t baselen;
2897         struct ieee802_11_elems elems;
2898
2899         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2900         if (baselen > len)
2901                 return;
2902
2903         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2904                                 &elems);
2905
2906         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
2907 }
2908
2909
2910 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2911                                      struct ieee80211_mgmt *mgmt,
2912                                      size_t len,
2913                                      struct ieee80211_rx_status *rx_status)
2914 {
2915         struct ieee80211_sub_if_data *sdata;
2916         struct ieee80211_if_sta *ifsta;
2917         size_t baselen;
2918         struct ieee802_11_elems elems;
2919         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2920         struct ieee80211_conf *conf = &local->hw.conf;
2921         u32 changed = 0;
2922
2923         /* Process beacon from the current BSS */
2924         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2925         if (baselen > len)
2926                 return;
2927
2928         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2929
2930         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
2931
2932         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2933         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2934                 return;
2935         ifsta = &sdata->u.sta;
2936
2937         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2938             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2939                 return;
2940
2941         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2942                                  elems.wmm_param_len);
2943
2944         /* Do not send changes to driver if we are scanning. This removes
2945          * requirement that driver's bss_info_changed function needs to be
2946          * atomic. */
2947         if (local->sta_sw_scanning || local->sta_hw_scanning)
2948                 return;
2949
2950         if (elems.erp_info && elems.erp_info_len >= 1)
2951                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2952         else {
2953                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2954                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2955                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2956         }
2957
2958         if (elems.ht_cap_elem && elems.ht_info_elem &&
2959             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2960                 struct ieee80211_ht_bss_info bss_info;
2961
2962                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2963                                 (struct ieee80211_ht_addt_info *)
2964                                 elems.ht_info_elem, &bss_info);
2965                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2966                                                &bss_info);
2967         }
2968
2969         ieee80211_bss_info_change_notify(sdata, changed);
2970 }
2971
2972
2973 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2974                                         struct ieee80211_if_sta *ifsta,
2975                                         struct ieee80211_mgmt *mgmt,
2976                                         size_t len,
2977                                         struct ieee80211_rx_status *rx_status)
2978 {
2979         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2980         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2981         int tx_last_beacon;
2982         struct sk_buff *skb;
2983         struct ieee80211_mgmt *resp;
2984         u8 *pos, *end;
2985         DECLARE_MAC_BUF(mac);
2986 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2987         DECLARE_MAC_BUF(mac2);
2988         DECLARE_MAC_BUF(mac3);
2989 #endif
2990
2991         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2992             ifsta->state != IEEE80211_IBSS_JOINED ||
2993             len < 24 + 2 || !ifsta->probe_resp)
2994                 return;
2995
2996         if (local->ops->tx_last_beacon)
2997                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2998         else
2999                 tx_last_beacon = 1;
3000
3001 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3002         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
3003                "%s (tx_last_beacon=%d)\n",
3004                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3005                print_mac(mac3, mgmt->bssid), tx_last_beacon);
3006 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3007
3008         if (!tx_last_beacon)
3009                 return;
3010
3011         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3012             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3013                 return;
3014
3015         end = ((u8 *) mgmt) + len;
3016         pos = mgmt->u.probe_req.variable;
3017         if (pos[0] != WLAN_EID_SSID ||
3018             pos + 2 + pos[1] > end) {
3019 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3020                 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3021                        "from %s\n",
3022                        dev->name, print_mac(mac, mgmt->sa));
3023 #endif
3024                 return;
3025         }
3026         if (pos[1] != 0 &&
3027             (pos[1] != ifsta->ssid_len ||
3028              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3029                 /* Ignore ProbeReq for foreign SSID */
3030                 return;
3031         }
3032
3033         /* Reply with ProbeResp */
3034         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3035         if (!skb)
3036                 return;
3037
3038         resp = (struct ieee80211_mgmt *) skb->data;
3039         memcpy(resp->da, mgmt->sa, ETH_ALEN);
3040 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3041         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3042                dev->name, print_mac(mac, resp->da));
3043 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3044         ieee80211_sta_tx(dev, skb, 0);
3045 }
3046
3047 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3048                                      struct ieee80211_if_sta *ifsta,
3049                                      struct ieee80211_mgmt *mgmt,
3050                                      size_t len,
3051                                      struct ieee80211_rx_status *rx_status)
3052 {
3053         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3054         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3055
3056         if (len < IEEE80211_MIN_ACTION_SIZE)
3057                 return;
3058
3059         switch (mgmt->u.action.category) {
3060         case WLAN_CATEGORY_SPECTRUM_MGMT:
3061                 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3062                         break;
3063                 switch (mgmt->u.action.u.chan_switch.action_code) {
3064                 case WLAN_ACTION_SPCT_MSR_REQ:
3065                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3066                                    sizeof(mgmt->u.action.u.measurement)))
3067                                 break;
3068                         ieee80211_sta_process_measurement_req(dev, mgmt, len);
3069                         break;
3070                 }
3071                 break;
3072         case WLAN_CATEGORY_BACK:
3073                 switch (mgmt->u.action.u.addba_req.action_code) {
3074                 case WLAN_ACTION_ADDBA_REQ:
3075                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3076                                    sizeof(mgmt->u.action.u.addba_req)))
3077                                 break;
3078                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3079                         break;
3080                 case WLAN_ACTION_ADDBA_RESP:
3081                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3082                                    sizeof(mgmt->u.action.u.addba_resp)))
3083                                 break;
3084                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3085                         break;
3086                 case WLAN_ACTION_DELBA:
3087                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3088                                    sizeof(mgmt->u.action.u.delba)))
3089                                 break;
3090                         ieee80211_sta_process_delba(dev, mgmt, len);
3091                         break;
3092                 }
3093                 break;
3094         case PLINK_CATEGORY:
3095                 if (ieee80211_vif_is_mesh(&sdata->vif))
3096                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3097                 break;
3098         case MESH_PATH_SEL_CATEGORY:
3099                 if (ieee80211_vif_is_mesh(&sdata->vif))
3100                         mesh_rx_path_sel_frame(dev, mgmt, len);
3101                 break;
3102         }
3103 }
3104
3105 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3106                            struct ieee80211_rx_status *rx_status)
3107 {
3108         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3109         struct ieee80211_sub_if_data *sdata;
3110         struct ieee80211_if_sta *ifsta;
3111         struct ieee80211_mgmt *mgmt;
3112         u16 fc;
3113
3114         if (skb->len < 24)
3115                 goto fail;
3116
3117         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3118         ifsta = &sdata->u.sta;
3119
3120         mgmt = (struct ieee80211_mgmt *) skb->data;
3121         fc = le16_to_cpu(mgmt->frame_control);
3122
3123         switch (fc & IEEE80211_FCTL_STYPE) {
3124         case IEEE80211_STYPE_PROBE_REQ:
3125         case IEEE80211_STYPE_PROBE_RESP:
3126         case IEEE80211_STYPE_BEACON:
3127         case IEEE80211_STYPE_ACTION:
3128                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3129         case IEEE80211_STYPE_AUTH:
3130         case IEEE80211_STYPE_ASSOC_RESP:
3131         case IEEE80211_STYPE_REASSOC_RESP:
3132         case IEEE80211_STYPE_DEAUTH:
3133         case IEEE80211_STYPE_DISASSOC:
3134                 skb_queue_tail(&ifsta->skb_queue, skb);
3135                 queue_work(local->hw.workqueue, &ifsta->work);
3136                 return;
3137         }
3138
3139  fail:
3140         kfree_skb(skb);
3141 }
3142
3143
3144 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3145                                          struct sk_buff *skb)
3146 {
3147         struct ieee80211_rx_status *rx_status;
3148         struct ieee80211_sub_if_data *sdata;
3149         struct ieee80211_if_sta *ifsta;
3150         struct ieee80211_mgmt *mgmt;
3151         u16 fc;
3152
3153         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3154         ifsta = &sdata->u.sta;
3155
3156         rx_status = (struct ieee80211_rx_status *) skb->cb;
3157         mgmt = (struct ieee80211_mgmt *) skb->data;
3158         fc = le16_to_cpu(mgmt->frame_control);
3159
3160         switch (fc & IEEE80211_FCTL_STYPE) {
3161         case IEEE80211_STYPE_PROBE_REQ:
3162                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3163                                             rx_status);
3164                 break;
3165         case IEEE80211_STYPE_PROBE_RESP:
3166                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3167                 break;
3168         case IEEE80211_STYPE_BEACON:
3169                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3170                 break;
3171         case IEEE80211_STYPE_AUTH:
3172                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3173                 break;
3174         case IEEE80211_STYPE_ASSOC_RESP:
3175                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3176                 break;
3177         case IEEE80211_STYPE_REASSOC_RESP:
3178                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3179                 break;
3180         case IEEE80211_STYPE_DEAUTH:
3181                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3182                 break;
3183         case IEEE80211_STYPE_DISASSOC:
3184                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3185                 break;
3186         case IEEE80211_STYPE_ACTION:
3187                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3188                 break;
3189         }
3190
3191         kfree_skb(skb);
3192 }
3193
3194
3195 ieee80211_rx_result
3196 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3197                       struct ieee80211_rx_status *rx_status)
3198 {
3199         struct ieee80211_mgmt *mgmt;
3200         __le16 fc;
3201
3202         if (skb->len < 2)
3203                 return RX_DROP_UNUSABLE;
3204
3205         mgmt = (struct ieee80211_mgmt *) skb->data;
3206         fc = mgmt->frame_control;
3207
3208         if (ieee80211_is_ctl(fc))
3209                 return RX_CONTINUE;
3210
3211         if (skb->len < 24)
3212                 return RX_DROP_MONITOR;
3213
3214         if (ieee80211_is_probe_resp(fc)) {
3215                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3216                 dev_kfree_skb(skb);
3217                 return RX_QUEUED;
3218         }
3219
3220         if (ieee80211_is_beacon(fc)) {
3221                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3222                 dev_kfree_skb(skb);
3223                 return RX_QUEUED;
3224         }
3225
3226         return RX_CONTINUE;
3227 }
3228
3229
3230 static int ieee80211_sta_active_ibss(struct net_device *dev)
3231 {
3232         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3233         int active = 0;
3234         struct sta_info *sta;
3235         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3236
3237         rcu_read_lock();
3238
3239         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3240                 if (sta->sdata == sdata &&
3241                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3242                                jiffies)) {
3243                         active++;
3244                         break;
3245                 }
3246         }
3247
3248         rcu_read_unlock();
3249
3250         return active;
3251 }
3252
3253
3254 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3255 {
3256         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3257         struct sta_info *sta, *tmp;
3258         LIST_HEAD(tmp_list);
3259         DECLARE_MAC_BUF(mac);
3260         unsigned long flags;
3261
3262         spin_lock_irqsave(&local->sta_lock, flags);
3263         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3264                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3265 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3266                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3267                                dev->name, print_mac(mac, sta->addr));
3268 #endif
3269                         __sta_info_unlink(&sta);
3270                         if (sta)
3271                                 list_add(&sta->list, &tmp_list);
3272                 }
3273         spin_unlock_irqrestore(&local->sta_lock, flags);
3274
3275         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3276                 sta_info_destroy(sta);
3277 }
3278
3279
3280 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3281                                      struct ieee80211_if_sta *ifsta)
3282 {
3283         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3284
3285         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3286         if (ieee80211_sta_active_ibss(dev))
3287                 return;
3288
3289         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3290                "IBSS networks with same SSID (merge)\n", dev->name);
3291         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3292 }
3293
3294
3295 #ifdef CONFIG_MAC80211_MESH
3296 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3297                            struct ieee80211_if_sta *ifsta)
3298 {
3299         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3300         bool free_plinks;
3301
3302         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3303         mesh_path_expire(dev);
3304
3305         free_plinks = mesh_plink_availables(sdata);
3306         if (free_plinks != sdata->u.sta.accepting_plinks)
3307                 ieee80211_if_config_beacon(dev);
3308
3309         mod_timer(&ifsta->timer, jiffies +
3310                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3311 }
3312
3313
3314 void ieee80211_start_mesh(struct net_device *dev)
3315 {
3316         struct ieee80211_if_sta *ifsta;
3317         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3318         ifsta = &sdata->u.sta;
3319         ifsta->state = IEEE80211_MESH_UP;
3320         ieee80211_sta_timer((unsigned long)sdata);
3321 }
3322 #endif
3323
3324
3325 void ieee80211_sta_timer(unsigned long data)
3326 {
3327         struct ieee80211_sub_if_data *sdata =
3328                 (struct ieee80211_sub_if_data *) data;
3329         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3330         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3331
3332         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3333         queue_work(local->hw.workqueue, &ifsta->work);
3334 }
3335
3336 void ieee80211_sta_work(struct work_struct *work)
3337 {
3338         struct ieee80211_sub_if_data *sdata =
3339                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3340         struct net_device *dev = sdata->dev;
3341         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3342         struct ieee80211_if_sta *ifsta;
3343         struct sk_buff *skb;
3344
3345         if (!netif_running(dev))
3346                 return;
3347
3348         if (local->sta_sw_scanning || local->sta_hw_scanning)
3349                 return;
3350
3351         if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3352                     sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3353                     sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3354                 return;
3355         ifsta = &sdata->u.sta;
3356
3357         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3358                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3359
3360 #ifdef CONFIG_MAC80211_MESH
3361         if (ifsta->preq_queue_len &&
3362             time_after(jiffies,
3363                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3364                 mesh_path_start_discovery(dev);
3365 #endif
3366
3367         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3368             ifsta->state != IEEE80211_ASSOCIATE &&
3369             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3370                 if (ifsta->scan_ssid_len)
3371                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3372                 else
3373                         ieee80211_sta_start_scan(dev, NULL, 0);
3374                 return;
3375         }
3376
3377         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3378                 if (ieee80211_sta_config_auth(dev, ifsta))
3379                         return;
3380                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3381         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3382                 return;
3383
3384         switch (ifsta->state) {
3385         case IEEE80211_DISABLED:
3386                 break;
3387         case IEEE80211_AUTHENTICATE:
3388                 ieee80211_authenticate(dev, ifsta);
3389                 break;
3390         case IEEE80211_ASSOCIATE:
3391                 ieee80211_associate(dev, ifsta);
3392                 break;
3393         case IEEE80211_ASSOCIATED:
3394                 ieee80211_associated(dev, ifsta);
3395                 break;
3396         case IEEE80211_IBSS_SEARCH:
3397                 ieee80211_sta_find_ibss(dev, ifsta);
3398                 break;
3399         case IEEE80211_IBSS_JOINED:
3400                 ieee80211_sta_merge_ibss(dev, ifsta);
3401                 break;
3402 #ifdef CONFIG_MAC80211_MESH
3403         case IEEE80211_MESH_UP:
3404                 ieee80211_mesh_housekeeping(dev, ifsta);
3405                 break;
3406 #endif
3407         default:
3408                 WARN_ON(1);
3409                 break;
3410         }
3411
3412         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3413                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3414                        "mixed-cell disabled - disassociate\n", dev->name);
3415
3416                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3417                 ieee80211_set_disassoc(dev, ifsta, 0);
3418         }
3419 }
3420
3421
3422 static void ieee80211_sta_reset_auth(struct net_device *dev,
3423                                      struct ieee80211_if_sta *ifsta)
3424 {
3425         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3426
3427         if (local->ops->reset_tsf) {
3428                 /* Reset own TSF to allow time synchronization work. */
3429                 local->ops->reset_tsf(local_to_hw(local));
3430         }
3431
3432         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3433
3434
3435         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3436                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3437         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3438                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3439         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3440                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3441         else
3442                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3443         ifsta->auth_transaction = -1;
3444         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3445         ifsta->auth_tries = ifsta->assoc_tries = 0;
3446         netif_carrier_off(dev);
3447 }
3448
3449
3450 void ieee80211_sta_req_auth(struct net_device *dev,
3451                             struct ieee80211_if_sta *ifsta)
3452 {
3453         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3454         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3455
3456         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3457                 return;
3458
3459         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3460                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3461             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3462                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3463                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3464                 queue_work(local->hw.workqueue, &ifsta->work);
3465         }
3466 }
3467
3468 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3469                                     const char *ssid, int ssid_len)
3470 {
3471         int tmp, hidden_ssid;
3472
3473         if (ssid_len == ifsta->ssid_len &&
3474             !memcmp(ifsta->ssid, ssid, ssid_len))
3475                 return 1;
3476
3477         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3478                 return 0;
3479
3480         hidden_ssid = 1;
3481         tmp = ssid_len;
3482         while (tmp--) {
3483                 if (ssid[tmp] != '\0') {
3484                         hidden_ssid = 0;
3485                         break;
3486                 }
3487         }
3488
3489         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3490                 return 1;
3491
3492         if (ssid_len == 1 && ssid[0] == ' ')
3493                 return 1;
3494
3495         return 0;
3496 }
3497
3498 static int ieee80211_sta_config_auth(struct net_device *dev,
3499                                      struct ieee80211_if_sta *ifsta)
3500 {
3501         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3502         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3503         struct ieee80211_sta_bss *bss, *selected = NULL;
3504         int top_rssi = 0, freq;
3505
3506         spin_lock_bh(&local->sta_bss_lock);
3507         freq = local->oper_channel->center_freq;
3508         list_for_each_entry(bss, &local->sta_bss_list, list) {
3509                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3510                         continue;
3511
3512                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3513                         IEEE80211_STA_AUTO_BSSID_SEL |
3514                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3515                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3516                      !!sdata->default_key))
3517                         continue;
3518
3519                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3520                     bss->freq != freq)
3521                         continue;
3522
3523                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3524                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3525                         continue;
3526
3527                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3528                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3529                         continue;
3530
3531                 if (!selected || top_rssi < bss->signal) {
3532                         selected = bss;
3533                         top_rssi = bss->signal;
3534                 }
3535         }
3536         if (selected)
3537                 atomic_inc(&selected->users);
3538         spin_unlock_bh(&local->sta_bss_lock);
3539
3540         if (selected) {
3541                 ieee80211_set_freq(dev, selected->freq);
3542                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3543                         ieee80211_sta_set_ssid(dev, selected->ssid,
3544                                                selected->ssid_len);
3545                 ieee80211_sta_set_bssid(dev, selected->bssid);
3546                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3547                 ieee80211_rx_bss_put(dev, selected);
3548                 ifsta->state = IEEE80211_AUTHENTICATE;
3549                 ieee80211_sta_reset_auth(dev, ifsta);
3550                 return 0;
3551         } else {
3552                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3553                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3554                                 ieee80211_sta_start_scan(dev, NULL, 0);
3555                         else
3556                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3557                                                          ifsta->ssid_len);
3558                         ifsta->state = IEEE80211_AUTHENTICATE;
3559                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3560                 } else
3561                         ifsta->state = IEEE80211_DISABLED;
3562         }
3563         return -1;
3564 }
3565
3566
3567 static int ieee80211_sta_create_ibss(struct net_device *dev,
3568                                      struct ieee80211_if_sta *ifsta)
3569 {
3570         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3571         struct ieee80211_sta_bss *bss;
3572         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3573         struct ieee80211_supported_band *sband;
3574         u8 bssid[ETH_ALEN], *pos;
3575         int i;
3576         int ret;
3577         DECLARE_MAC_BUF(mac);
3578
3579 #if 0
3580         /* Easier testing, use fixed BSSID. */
3581         memset(bssid, 0xfe, ETH_ALEN);
3582 #else
3583         /* Generate random, not broadcast, locally administered BSSID. Mix in
3584          * own MAC address to make sure that devices that do not have proper
3585          * random number generator get different BSSID. */
3586         get_random_bytes(bssid, ETH_ALEN);
3587         for (i = 0; i < ETH_ALEN; i++)
3588                 bssid[i] ^= dev->dev_addr[i];
3589         bssid[0] &= ~0x01;
3590         bssid[0] |= 0x02;
3591 #endif
3592
3593         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3594                dev->name, print_mac(mac, bssid));
3595
3596         bss = ieee80211_rx_bss_add(dev, bssid,
3597                                    local->hw.conf.channel->center_freq,
3598                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3599         if (!bss)
3600                 return -ENOMEM;
3601
3602         bss->band = local->hw.conf.channel->band;
3603         sband = local->hw.wiphy->bands[bss->band];
3604
3605         if (local->hw.conf.beacon_int == 0)
3606                 local->hw.conf.beacon_int = 100;
3607         bss->beacon_int = local->hw.conf.beacon_int;
3608         bss->last_update = jiffies;
3609         bss->capability = WLAN_CAPABILITY_IBSS;
3610
3611         if (sdata->default_key)
3612                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3613         else
3614                 sdata->drop_unencrypted = 0;
3615
3616         bss->supp_rates_len = sband->n_bitrates;
3617         pos = bss->supp_rates;
3618         for (i = 0; i < sband->n_bitrates; i++) {
3619                 int rate = sband->bitrates[i].bitrate;
3620                 *pos++ = (u8) (rate / 5);
3621         }
3622
3623         ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3624         ieee80211_rx_bss_put(dev, bss);
3625         return ret;
3626 }
3627
3628
3629 static int ieee80211_sta_find_ibss(struct net_device *dev,
3630                                    struct ieee80211_if_sta *ifsta)
3631 {
3632         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3633         struct ieee80211_sta_bss *bss;
3634         int found = 0;
3635         u8 bssid[ETH_ALEN];
3636         int active_ibss;
3637         DECLARE_MAC_BUF(mac);
3638         DECLARE_MAC_BUF(mac2);
3639
3640         if (ifsta->ssid_len == 0)
3641                 return -EINVAL;
3642
3643         active_ibss = ieee80211_sta_active_ibss(dev);
3644 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3645         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3646                dev->name, active_ibss);
3647 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3648         spin_lock_bh(&local->sta_bss_lock);
3649         list_for_each_entry(bss, &local->sta_bss_list, list) {
3650                 if (ifsta->ssid_len != bss->ssid_len ||
3651                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3652                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3653                         continue;
3654 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3655                 printk(KERN_DEBUG "   bssid=%s found\n",
3656                        print_mac(mac, bss->bssid));
3657 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3658                 memcpy(bssid, bss->bssid, ETH_ALEN);
3659                 found = 1;
3660                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3661                         break;
3662         }
3663         spin_unlock_bh(&local->sta_bss_lock);
3664
3665 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3666         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3667                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3668 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3669         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3670             (bss = ieee80211_rx_bss_get(dev, bssid,
3671                                         local->hw.conf.channel->center_freq,
3672                                         ifsta->ssid, ifsta->ssid_len))) {
3673                 int ret;
3674                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3675                        " based on configured SSID\n",
3676                        dev->name, print_mac(mac, bssid));
3677                 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3678                 ieee80211_rx_bss_put(dev, bss);
3679                 return ret;
3680         }
3681 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3682         printk(KERN_DEBUG "   did not try to join ibss\n");
3683 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3684
3685         /* Selected IBSS not found in current scan results - try to scan */
3686         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3687             !ieee80211_sta_active_ibss(dev)) {
3688                 mod_timer(&ifsta->timer, jiffies +
3689                                       IEEE80211_IBSS_MERGE_INTERVAL);
3690         } else if (time_after(jiffies, local->last_scan_completed +
3691                               IEEE80211_SCAN_INTERVAL)) {
3692                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3693                        "join\n", dev->name);
3694                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3695                                               ifsta->ssid_len);
3696         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3697                 int interval = IEEE80211_SCAN_INTERVAL;
3698
3699                 if (time_after(jiffies, ifsta->ibss_join_req +
3700                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3701                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3702                             (!(local->oper_channel->flags &
3703                                         IEEE80211_CHAN_NO_IBSS)))
3704                                 return ieee80211_sta_create_ibss(dev, ifsta);
3705                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3706                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3707                                        " %d MHz\n", dev->name,
3708                                        local->hw.conf.channel->center_freq);
3709                         }
3710
3711                         /* No IBSS found - decrease scan interval and continue
3712                          * scanning. */
3713                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3714                 }
3715
3716                 ifsta->state = IEEE80211_IBSS_SEARCH;
3717                 mod_timer(&ifsta->timer, jiffies + interval);
3718                 return 0;
3719         }
3720
3721         return 0;
3722 }
3723
3724
3725 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3726 {
3727         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3728         struct ieee80211_if_sta *ifsta;
3729
3730         if (len > IEEE80211_MAX_SSID_LEN)
3731                 return -EINVAL;
3732
3733         ifsta = &sdata->u.sta;
3734
3735         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3736                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3737         memcpy(ifsta->ssid, ssid, len);
3738         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3739         ifsta->ssid_len = len;
3740
3741         if (len)
3742                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3743         else
3744                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
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         return 0;
3752 }
3753
3754
3755 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3756 {
3757         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3758         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3759         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3760         *len = ifsta->ssid_len;
3761         return 0;
3762 }
3763
3764
3765 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3766 {
3767         struct ieee80211_sub_if_data *sdata;
3768         struct ieee80211_if_sta *ifsta;
3769         int res;
3770
3771         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3772         ifsta = &sdata->u.sta;
3773
3774         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3775                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3776                 res = ieee80211_if_config(dev);
3777                 if (res) {
3778                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3779                                "the low-level driver\n", dev->name);
3780                         return res;
3781                 }
3782         }
3783
3784         if (is_valid_ether_addr(bssid))
3785                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3786         else
3787                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3788
3789         return 0;
3790 }
3791
3792
3793 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3794                                     struct ieee80211_sub_if_data *sdata,
3795                                     int powersave)
3796 {
3797         struct sk_buff *skb;
3798         struct ieee80211_hdr *nullfunc;
3799         __le16 fc;
3800
3801         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3802         if (!skb) {
3803                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3804                        "frame\n", sdata->dev->name);
3805                 return;
3806         }
3807         skb_reserve(skb, local->hw.extra_tx_headroom);
3808
3809         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3810         memset(nullfunc, 0, 24);
3811         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3812                          IEEE80211_FCTL_TODS);
3813         if (powersave)
3814                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3815         nullfunc->frame_control = fc;
3816         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3817         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3818         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3819
3820         ieee80211_sta_tx(sdata->dev, skb, 0);
3821 }
3822
3823
3824 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3825 {
3826         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3827             ieee80211_vif_is_mesh(&sdata->vif))
3828                 ieee80211_sta_timer((unsigned long)sdata);
3829 }
3830
3831 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3832 {
3833         struct ieee80211_local *local = hw_to_local(hw);
3834         struct net_device *dev = local->scan_dev;
3835         struct ieee80211_sub_if_data *sdata;
3836         union iwreq_data wrqu;
3837
3838         local->last_scan_completed = jiffies;
3839         memset(&wrqu, 0, sizeof(wrqu));
3840         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3841
3842         if (local->sta_hw_scanning) {
3843                 local->sta_hw_scanning = 0;
3844                 if (ieee80211_hw_config(local))
3845                         printk(KERN_DEBUG "%s: failed to restore operational "
3846                                "channel after scan\n", dev->name);
3847                 /* Restart STA timer for HW scan case */
3848                 rcu_read_lock();
3849                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3850                         ieee80211_restart_sta_timer(sdata);
3851                 rcu_read_unlock();
3852
3853                 goto done;
3854         }
3855
3856         local->sta_sw_scanning = 0;
3857         if (ieee80211_hw_config(local))
3858                 printk(KERN_DEBUG "%s: failed to restore operational "
3859                        "channel after scan\n", dev->name);
3860
3861
3862         netif_tx_lock_bh(local->mdev);
3863         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3864         local->ops->configure_filter(local_to_hw(local),
3865                                      FIF_BCN_PRBRESP_PROMISC,
3866                                      &local->filter_flags,
3867                                      local->mdev->mc_count,
3868                                      local->mdev->mc_list);
3869
3870         netif_tx_unlock_bh(local->mdev);
3871
3872         rcu_read_lock();
3873         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3874
3875                 /* No need to wake the master device. */
3876                 if (sdata->dev == local->mdev)
3877                         continue;
3878
3879                 /* Tell AP we're back */
3880                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3881                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3882                         ieee80211_send_nullfunc(local, sdata, 0);
3883
3884                 ieee80211_restart_sta_timer(sdata);
3885
3886                 netif_wake_queue(sdata->dev);
3887         }
3888         rcu_read_unlock();
3889
3890 done:
3891         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3892         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3893                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3894                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3895                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3896                     !ieee80211_sta_active_ibss(dev)))
3897                         ieee80211_sta_find_ibss(dev, ifsta);
3898         }
3899 }
3900 EXPORT_SYMBOL(ieee80211_scan_completed);
3901
3902 void ieee80211_sta_scan_work(struct work_struct *work)
3903 {
3904         struct ieee80211_local *local =
3905                 container_of(work, struct ieee80211_local, scan_work.work);
3906         struct net_device *dev = local->scan_dev;
3907         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3908         struct ieee80211_supported_band *sband;
3909         struct ieee80211_channel *chan;
3910         int skip;
3911         unsigned long next_delay = 0;
3912
3913         if (!local->sta_sw_scanning)
3914                 return;
3915
3916         switch (local->scan_state) {
3917         case SCAN_SET_CHANNEL:
3918                 /*
3919                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3920                  * after we successfully scanned the last channel of the last
3921                  * band (and the last band is supported by the hw)
3922                  */
3923                 if (local->scan_band < IEEE80211_NUM_BANDS)
3924                         sband = local->hw.wiphy->bands[local->scan_band];
3925                 else
3926                         sband = NULL;
3927
3928                 /*
3929                  * If we are at an unsupported band and have more bands
3930                  * left to scan, advance to the next supported one.
3931                  */
3932                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3933                         local->scan_band++;
3934                         sband = local->hw.wiphy->bands[local->scan_band];
3935                         local->scan_channel_idx = 0;
3936                 }
3937
3938                 /* if no more bands/channels left, complete scan */
3939                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3940                         ieee80211_scan_completed(local_to_hw(local));
3941                         return;
3942                 }
3943                 skip = 0;
3944                 chan = &sband->channels[local->scan_channel_idx];
3945
3946                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3947                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3948                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3949                         skip = 1;
3950
3951                 if (!skip) {
3952                         local->scan_channel = chan;
3953                         if (ieee80211_hw_config(local)) {
3954                                 printk(KERN_DEBUG "%s: failed to set freq to "
3955                                        "%d MHz for scan\n", dev->name,
3956                                        chan->center_freq);
3957                                 skip = 1;
3958                         }
3959                 }
3960
3961                 /* advance state machine to next channel/band */
3962                 local->scan_channel_idx++;
3963                 if (local->scan_channel_idx >= sband->n_channels) {
3964                         /*
3965                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3966                          * we'll catch that case above and complete the scan
3967                          * if that is the case.
3968                          */
3969                         local->scan_band++;
3970                         local->scan_channel_idx = 0;
3971                 }
3972
3973                 if (skip)
3974                         break;
3975
3976                 next_delay = IEEE80211_PROBE_DELAY +
3977                              usecs_to_jiffies(local->hw.channel_change_time);
3978                 local->scan_state = SCAN_SEND_PROBE;
3979                 break;
3980         case SCAN_SEND_PROBE:
3981                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3982                 local->scan_state = SCAN_SET_CHANNEL;
3983
3984                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3985                         break;
3986                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3987                                          local->scan_ssid_len);
3988                 next_delay = IEEE80211_CHANNEL_TIME;
3989                 break;
3990         }
3991
3992         if (local->sta_sw_scanning)
3993                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3994                                    next_delay);
3995 }
3996
3997
3998 static int ieee80211_sta_start_scan(struct net_device *dev,
3999                                     u8 *ssid, size_t ssid_len)
4000 {
4001         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4002         struct ieee80211_sub_if_data *sdata;
4003
4004         if (ssid_len > IEEE80211_MAX_SSID_LEN)
4005                 return -EINVAL;
4006
4007         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
4008          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4009          * BSSID: MACAddress
4010          * SSID
4011          * ScanType: ACTIVE, PASSIVE
4012          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4013          *    a Probe frame during active scanning
4014          * ChannelList
4015          * MinChannelTime (>= ProbeDelay), in TU
4016          * MaxChannelTime: (>= MinChannelTime), in TU
4017          */
4018
4019          /* MLME-SCAN.confirm
4020           * BSSDescriptionSet
4021           * ResultCode: SUCCESS, INVALID_PARAMETERS
4022          */
4023
4024         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4025                 if (local->scan_dev == dev)
4026                         return 0;
4027                 return -EBUSY;
4028         }
4029
4030         if (local->ops->hw_scan) {
4031                 int rc = local->ops->hw_scan(local_to_hw(local),
4032                                              ssid, ssid_len);
4033                 if (!rc) {
4034                         local->sta_hw_scanning = 1;
4035                         local->scan_dev = dev;
4036                 }
4037                 return rc;
4038         }
4039
4040         local->sta_sw_scanning = 1;
4041
4042         rcu_read_lock();
4043         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4044
4045                 /* Don't stop the master interface, otherwise we can't transmit
4046                  * probes! */
4047                 if (sdata->dev == local->mdev)
4048                         continue;
4049
4050                 netif_stop_queue(sdata->dev);
4051                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4052                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4053                         ieee80211_send_nullfunc(local, sdata, 1);
4054         }
4055         rcu_read_unlock();
4056
4057         if (ssid) {
4058                 local->scan_ssid_len = ssid_len;
4059                 memcpy(local->scan_ssid, ssid, ssid_len);
4060         } else
4061                 local->scan_ssid_len = 0;
4062         local->scan_state = SCAN_SET_CHANNEL;
4063         local->scan_channel_idx = 0;
4064         local->scan_band = IEEE80211_BAND_2GHZ;
4065         local->scan_dev = dev;
4066
4067         netif_tx_lock_bh(local->mdev);
4068         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4069         local->ops->configure_filter(local_to_hw(local),
4070                                      FIF_BCN_PRBRESP_PROMISC,
4071                                      &local->filter_flags,
4072                                      local->mdev->mc_count,
4073                                      local->mdev->mc_list);
4074         netif_tx_unlock_bh(local->mdev);
4075
4076         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4077         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4078                            IEEE80211_CHANNEL_TIME);
4079
4080         return 0;
4081 }
4082
4083
4084 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4085 {
4086         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4087         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4088         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4089
4090         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4091                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4092
4093         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4094                 if (local->scan_dev == dev)
4095                         return 0;
4096                 return -EBUSY;
4097         }
4098
4099         ifsta->scan_ssid_len = ssid_len;
4100         if (ssid_len)
4101                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4102         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4103         queue_work(local->hw.workqueue, &ifsta->work);
4104         return 0;
4105 }
4106
4107 static char *
4108 ieee80211_sta_scan_result(struct net_device *dev,
4109                           struct iw_request_info *info,
4110                           struct ieee80211_sta_bss *bss,
4111                           char *current_ev, char *end_buf)
4112 {
4113         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4114         struct iw_event iwe;
4115
4116         if (time_after(jiffies,
4117                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4118                 return current_ev;
4119
4120         memset(&iwe, 0, sizeof(iwe));
4121         iwe.cmd = SIOCGIWAP;
4122         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4123         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4124         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4125                                           IW_EV_ADDR_LEN);
4126
4127         memset(&iwe, 0, sizeof(iwe));
4128         iwe.cmd = SIOCGIWESSID;
4129         if (bss_mesh_cfg(bss)) {
4130                 iwe.u.data.length = bss_mesh_id_len(bss);
4131                 iwe.u.data.flags = 1;
4132                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4133                                                   &iwe, bss_mesh_id(bss));
4134         } else {
4135                 iwe.u.data.length = bss->ssid_len;
4136                 iwe.u.data.flags = 1;
4137                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4138                                                   &iwe, bss->ssid);
4139         }
4140
4141         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4142             || bss_mesh_cfg(bss)) {
4143                 memset(&iwe, 0, sizeof(iwe));
4144                 iwe.cmd = SIOCGIWMODE;
4145                 if (bss_mesh_cfg(bss))
4146                         iwe.u.mode = IW_MODE_MESH;
4147                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4148                         iwe.u.mode = IW_MODE_MASTER;
4149                 else
4150                         iwe.u.mode = IW_MODE_ADHOC;
4151                 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4152                                                   &iwe, IW_EV_UINT_LEN);
4153         }
4154
4155         memset(&iwe, 0, sizeof(iwe));
4156         iwe.cmd = SIOCGIWFREQ;
4157         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4158         iwe.u.freq.e = 0;
4159         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4160                                           IW_EV_FREQ_LEN);
4161
4162         memset(&iwe, 0, sizeof(iwe));
4163         iwe.cmd = SIOCGIWFREQ;
4164         iwe.u.freq.m = bss->freq;
4165         iwe.u.freq.e = 6;
4166         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4167                                           IW_EV_FREQ_LEN);
4168         memset(&iwe, 0, sizeof(iwe));
4169         iwe.cmd = IWEVQUAL;
4170         iwe.u.qual.qual = bss->qual;
4171         iwe.u.qual.level = bss->signal;
4172         iwe.u.qual.noise = bss->noise;
4173         iwe.u.qual.updated = local->wstats_flags;
4174         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4175                                           IW_EV_QUAL_LEN);
4176
4177         memset(&iwe, 0, sizeof(iwe));
4178         iwe.cmd = SIOCGIWENCODE;
4179         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4180                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4181         else
4182                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4183         iwe.u.data.length = 0;
4184         current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4185                                           &iwe, "");
4186
4187         if (bss && bss->wpa_ie) {
4188                 memset(&iwe, 0, sizeof(iwe));
4189                 iwe.cmd = IWEVGENIE;
4190                 iwe.u.data.length = bss->wpa_ie_len;
4191                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4192                                                   &iwe, bss->wpa_ie);
4193         }
4194
4195         if (bss && bss->rsn_ie) {
4196                 memset(&iwe, 0, sizeof(iwe));
4197                 iwe.cmd = IWEVGENIE;
4198                 iwe.u.data.length = bss->rsn_ie_len;
4199                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4200                                                   &iwe, bss->rsn_ie);
4201         }
4202
4203         if (bss && bss->ht_ie) {
4204                 memset(&iwe, 0, sizeof(iwe));
4205                 iwe.cmd = IWEVGENIE;
4206                 iwe.u.data.length = bss->ht_ie_len;
4207                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4208                                                   &iwe, bss->ht_ie);
4209         }
4210
4211         if (bss && bss->supp_rates_len > 0) {
4212                 /* display all supported rates in readable format */
4213                 char *p = current_ev + iwe_stream_lcp_len(info);
4214                 int i;
4215
4216                 memset(&iwe, 0, sizeof(iwe));
4217                 iwe.cmd = SIOCGIWRATE;
4218                 /* Those two flags are ignored... */
4219                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4220
4221                 for (i = 0; i < bss->supp_rates_len; i++) {
4222                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4223                                                         0x7f) * 500000);
4224                         p = iwe_stream_add_value(info, current_ev, p,
4225                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4226                 }
4227                 current_ev = p;
4228         }
4229
4230         if (bss) {
4231                 char *buf;
4232                 buf = kmalloc(30, GFP_ATOMIC);
4233                 if (buf) {
4234                         memset(&iwe, 0, sizeof(iwe));
4235                         iwe.cmd = IWEVCUSTOM;
4236                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4237                         iwe.u.data.length = strlen(buf);
4238                         current_ev = iwe_stream_add_point(info, current_ev,
4239                                                           end_buf,
4240                                                           &iwe, buf);
4241                         memset(&iwe, 0, sizeof(iwe));
4242                         iwe.cmd = IWEVCUSTOM;
4243                         sprintf(buf, " Last beacon: %dms ago",
4244                                 jiffies_to_msecs(jiffies - bss->last_update));
4245                         iwe.u.data.length = strlen(buf);
4246                         current_ev = iwe_stream_add_point(info, current_ev,
4247                                                           end_buf, &iwe, buf);
4248                         kfree(buf);
4249                 }
4250         }
4251
4252         if (bss_mesh_cfg(bss)) {
4253                 char *buf;
4254                 u8 *cfg = bss_mesh_cfg(bss);
4255                 buf = kmalloc(50, GFP_ATOMIC);
4256                 if (buf) {
4257                         memset(&iwe, 0, sizeof(iwe));
4258                         iwe.cmd = IWEVCUSTOM;
4259                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4260                         iwe.u.data.length = strlen(buf);
4261                         current_ev = iwe_stream_add_point(info, current_ev,
4262                                                           end_buf,
4263                                                           &iwe, buf);
4264                         sprintf(buf, "Path Selection Protocol ID: "
4265                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4266                                                         cfg[4]);
4267                         iwe.u.data.length = strlen(buf);
4268                         current_ev = iwe_stream_add_point(info, current_ev,
4269                                                           end_buf,
4270                                                           &iwe, buf);
4271                         sprintf(buf, "Path Selection Metric ID: "
4272                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4273                                                         cfg[8]);
4274                         iwe.u.data.length = strlen(buf);
4275                         current_ev = iwe_stream_add_point(info, current_ev,
4276                                                           end_buf,
4277                                                           &iwe, buf);
4278                         sprintf(buf, "Congestion Control Mode ID: "
4279                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4280                                                         cfg[11], cfg[12]);
4281                         iwe.u.data.length = strlen(buf);
4282                         current_ev = iwe_stream_add_point(info, current_ev,
4283                                                           end_buf,
4284                                                           &iwe, buf);
4285                         sprintf(buf, "Channel Precedence: "
4286                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4287                                                         cfg[15], cfg[16]);
4288                         iwe.u.data.length = strlen(buf);
4289                         current_ev = iwe_stream_add_point(info, current_ev,
4290                                                           end_buf,
4291                                                           &iwe, buf);
4292                         kfree(buf);
4293                 }
4294         }
4295
4296         return current_ev;
4297 }
4298
4299
4300 int ieee80211_sta_scan_results(struct net_device *dev,
4301                                struct iw_request_info *info,
4302                                char *buf, size_t len)
4303 {
4304         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4305         char *current_ev = buf;
4306         char *end_buf = buf + len;
4307         struct ieee80211_sta_bss *bss;
4308
4309         spin_lock_bh(&local->sta_bss_lock);
4310         list_for_each_entry(bss, &local->sta_bss_list, list) {
4311                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4312                         spin_unlock_bh(&local->sta_bss_lock);
4313                         return -E2BIG;
4314                 }
4315                 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4316                                                        current_ev, end_buf);
4317         }
4318         spin_unlock_bh(&local->sta_bss_lock);
4319         return current_ev - buf;
4320 }
4321
4322
4323 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4324 {
4325         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4326         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4327
4328         kfree(ifsta->extra_ie);
4329         if (len == 0) {
4330                 ifsta->extra_ie = NULL;
4331                 ifsta->extra_ie_len = 0;
4332                 return 0;
4333         }
4334         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4335         if (!ifsta->extra_ie) {
4336                 ifsta->extra_ie_len = 0;
4337                 return -ENOMEM;
4338         }
4339         memcpy(ifsta->extra_ie, ie, len);
4340         ifsta->extra_ie_len = len;
4341         return 0;
4342 }
4343
4344
4345 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4346                                         struct sk_buff *skb, u8 *bssid,
4347                                         u8 *addr, u64 supp_rates)
4348 {
4349         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4350         struct sta_info *sta;
4351         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4352         DECLARE_MAC_BUF(mac);
4353         int band = local->hw.conf.channel->band;
4354
4355         /* TODO: Could consider removing the least recently used entry and
4356          * allow new one to be added. */
4357         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4358                 if (net_ratelimit()) {
4359                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4360                                "entry %s\n", dev->name, print_mac(mac, addr));
4361                 }
4362                 return NULL;
4363         }
4364
4365         if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4366                 return NULL;
4367
4368 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4369         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4370                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4371 #endif
4372
4373         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4374         if (!sta)
4375                 return NULL;
4376
4377         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4378
4379         if (supp_rates)
4380                 sta->supp_rates[band] = supp_rates;
4381         else
4382                 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4383
4384         rate_control_rate_init(sta, local);
4385
4386         if (sta_info_insert(sta))
4387                 return NULL;
4388
4389         return sta;
4390 }
4391
4392
4393 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4394 {
4395         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4396         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4397
4398         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4399                dev->name, reason);
4400
4401         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4402             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4403                 return -EINVAL;
4404
4405         ieee80211_send_deauth(dev, ifsta, reason);
4406         ieee80211_set_disassoc(dev, ifsta, 1);
4407         return 0;
4408 }
4409
4410
4411 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4412 {
4413         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4414         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4415
4416         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4417                dev->name, reason);
4418
4419         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4420                 return -EINVAL;
4421
4422         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4423                 return -1;
4424
4425         ieee80211_send_disassoc(dev, ifsta, reason);
4426         ieee80211_set_disassoc(dev, ifsta, 0);
4427         return 0;
4428 }
4429
4430 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4431                           enum ieee80211_notification_types  notif_type)
4432 {
4433         struct ieee80211_local *local = hw_to_local(hw);
4434         struct ieee80211_sub_if_data *sdata;
4435
4436         switch (notif_type) {
4437         case IEEE80211_NOTIFY_RE_ASSOC:
4438                 rcu_read_lock();
4439                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4440
4441                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4442                                 ieee80211_sta_req_auth(sdata->dev,
4443                                                        &sdata->u.sta);
4444                         }
4445
4446                 }
4447                 rcu_read_unlock();
4448                 break;
4449         }
4450 }
4451 EXPORT_SYMBOL(ieee80211_notify_mac);