err.no Git - linux-2.6/blob - net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "rate.h"
  34 #include "led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 /* mgmt header + 1 byte action code */
  63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  64
  65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  70
  71 /* next values represent the buffer size for A-MPDU frame.
  72  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  73 #define IEEE80211_MIN_AMPDU_BUF 0x8
  74 #define IEEE80211_MAX_AMPDU_BUF 0x40
  75
  76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  77                                      u8 *ssid, size_t ssid_len);
  78 static struct ieee80211_sta_bss *
  79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  80                      u8 *ssid, u8 ssid_len);
  81 static void ieee80211_rx_bss_put(struct 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_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                 if (net_ratelimit()) {
 375                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 376                                "%s)\n",
 377                                sdata->dev->name,
 378                                use_protection ? "enabled" : "disabled",
 379                                print_mac(mac, ifsta->bssid));
 380                 }
 381                 bss_conf->use_cts_prot = use_protection;
 382                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 383         }
 384
 385         if (use_short_preamble != bss_conf->use_short_preamble) {
 386                 if (net_ratelimit()) {
 387                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 388                                " (BSSID=%s)\n",
 389                                sdata->dev->name,
 390                                use_short_preamble ? "short" : "long",
 391                                print_mac(mac, ifsta->bssid));
 392                 }
 393                 bss_conf->use_short_preamble = use_short_preamble;
 394                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 395         }
 396
 397         return changed;
 398 }
 399
 400 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 401                                    u8 erp_value)
 402 {
 403         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 404         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 405
 406         return ieee80211_handle_protect_preamb(sdata,
 407                         use_protection, use_short_preamble);
 408 }
 409
 410 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 411                                            struct ieee80211_sta_bss *bss)
 412 {
 413         u32 changed = 0;
 414
 415         if (bss->has_erp_value)
 416                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 417         else {
 418                 u16 capab = bss->capability;
 419                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 420                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 421         }
 422
 423         return changed;
 424 }
 425
 426 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 427                                    struct ieee80211_ht_info *ht_info)
 428 {
 429
 430         if (ht_info == NULL)
 431                 return -EINVAL;
 432
 433         memset(ht_info, 0, sizeof(*ht_info));
 434
 435         if (ht_cap_ie) {
 436                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 437
 438                 ht_info->ht_supported = 1;
 439                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 440                 ht_info->ampdu_factor =
 441                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 442                 ht_info->ampdu_density =
 443                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 444                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 445         } else
 446                 ht_info->ht_supported = 0;
 447
 448         return 0;
 449 }
 450
 451 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 452                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 453                         struct ieee80211_ht_bss_info *bss_info)
 454 {
 455         if (bss_info == NULL)
 456                 return -EINVAL;
 457
 458         memset(bss_info, 0, sizeof(*bss_info));
 459
 460         if (ht_add_info_ie) {
 461                 u16 op_mode;
 462                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 463
 464                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 465                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 466                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 467         }
 468
 469         return 0;
 470 }
 471
 472 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 473                                          struct ieee80211_if_sta *ifsta)
 474 {
 475         char *buf;
 476         size_t len;
 477         int i;
 478         union iwreq_data wrqu;
 479
 480         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 481                 return;
 482
 483         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 484                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 485         if (!buf)
 486                 return;
 487
 488         len = sprintf(buf, "ASSOCINFO(");
 489         if (ifsta->assocreq_ies) {
 490                 len += sprintf(buf + len, "ReqIEs=");
 491                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 492                         len += sprintf(buf + len, "%02x",
 493                                        ifsta->assocreq_ies[i]);
 494                 }
 495         }
 496         if (ifsta->assocresp_ies) {
 497                 if (ifsta->assocreq_ies)
 498                         len += sprintf(buf + len, " ");
 499                 len += sprintf(buf + len, "RespIEs=");
 500                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 501                         len += sprintf(buf + len, "%02x",
 502                                        ifsta->assocresp_ies[i]);
 503                 }
 504         }
 505         len += sprintf(buf + len, ")");
 506
 507         if (len > IW_CUSTOM_MAX) {
 508                 len = sprintf(buf, "ASSOCRESPIE=");
 509                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 510                         len += sprintf(buf + len, "%02x",
 511                                        ifsta->assocresp_ies[i]);
 512                 }
 513         }
 514
 515         memset(&wrqu, 0, sizeof(wrqu));
 516         wrqu.data.length = len;
 517         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 518
 519         kfree(buf);
 520 }
 521
 522
 523 static void ieee80211_set_associated(struct net_device *dev,
 524                                      struct ieee80211_if_sta *ifsta,
 525                                      bool assoc)
 526 {
 527         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 528         struct ieee80211_local *local = sdata->local;
 529         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 530         union iwreq_data wrqu;
 531         u32 changed = BSS_CHANGED_ASSOC;
 532
 533         if (assoc) {
 534                 struct ieee80211_sta_bss *bss;
 535
 536                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 537
 538                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 539                         return;
 540
 541                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 542                                            conf->channel->center_freq,
 543                                            ifsta->ssid, ifsta->ssid_len);
 544                 if (bss) {
 545                         /* set timing information */
 546                         sdata->bss_conf.beacon_int = bss->beacon_int;
 547                         sdata->bss_conf.timestamp = bss->timestamp;
 548
 549                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 550
 551                         ieee80211_rx_bss_put(dev, bss);
 552                 }
 553
 554                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 555                         changed |= BSS_CHANGED_HT;
 556                         sdata->bss_conf.assoc_ht = 1;
 557                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 558                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 559                 }
 560
 561                 netif_carrier_on(dev);
 562                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 563                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 564                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 565                 ieee80211_sta_send_associnfo(dev, ifsta);
 566         } else {
 567                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 568                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 569                 netif_carrier_off(dev);
 570                 ieee80211_reset_erp_info(dev);
 571
 572                 sdata->bss_conf.assoc_ht = 0;
 573                 sdata->bss_conf.ht_conf = NULL;
 574                 sdata->bss_conf.ht_bss_conf = NULL;
 575
 576                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 577         }
 578         ifsta->last_probe = jiffies;
 579         ieee80211_led_assoc(local, assoc);
 580
 581         sdata->bss_conf.assoc = assoc;
 582         ieee80211_bss_info_change_notify(sdata, changed);
 583         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 584         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 585 }
 586
 587 static void ieee80211_set_disassoc(struct net_device *dev,
 588                                    struct ieee80211_if_sta *ifsta, int deauth)
 589 {
 590         if (deauth)
 591                 ifsta->auth_tries = 0;
 592         ifsta->assoc_tries = 0;
 593         ieee80211_set_associated(dev, ifsta, 0);
 594 }
 595
 596 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 597                       int encrypt)
 598 {
 599         struct ieee80211_sub_if_data *sdata;
 600         struct ieee80211_tx_info *info;
 601
 602         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 603         skb->dev = sdata->local->mdev;
 604         skb_set_mac_header(skb, 0);
 605         skb_set_network_header(skb, 0);
 606         skb_set_transport_header(skb, 0);
 607
 608         info = IEEE80211_SKB_CB(skb);
 609         memset(info, 0, sizeof(struct ieee80211_tx_info));
 610         info->control.ifindex = sdata->dev->ifindex;
 611         if (!encrypt)
 612                 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
 613
 614         dev_queue_xmit(skb);
 615 }
 616
 617
 618 static void ieee80211_send_auth(struct net_device *dev,
 619                                 struct ieee80211_if_sta *ifsta,
 620                                 int transaction, u8 *extra, size_t extra_len,
 621                                 int encrypt)
 622 {
 623         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 624         struct sk_buff *skb;
 625         struct ieee80211_mgmt *mgmt;
 626
 627         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 628                             sizeof(*mgmt) + 6 + extra_len);
 629         if (!skb) {
 630                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 631                        "frame\n", dev->name);
 632                 return;
 633         }
 634         skb_reserve(skb, local->hw.extra_tx_headroom);
 635
 636         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 637         memset(mgmt, 0, 24 + 6);
 638         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 639                                            IEEE80211_STYPE_AUTH);
 640         if (encrypt)
 641                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 642         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 643         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 644         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 645         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 646         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 647         ifsta->auth_transaction = transaction + 1;
 648         mgmt->u.auth.status_code = cpu_to_le16(0);
 649         if (extra)
 650                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 651
 652         ieee80211_sta_tx(dev, skb, encrypt);
 653 }
 654
 655
 656 static void ieee80211_authenticate(struct net_device *dev,
 657                                    struct ieee80211_if_sta *ifsta)
 658 {
 659         DECLARE_MAC_BUF(mac);
 660
 661         ifsta->auth_tries++;
 662         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 663                 printk(KERN_DEBUG "%s: authentication with AP %s"
 664                        " timed out\n",
 665                        dev->name, print_mac(mac, ifsta->bssid));
 666                 ifsta->state = IEEE80211_DISABLED;
 667                 return;
 668         }
 669
 670         ifsta->state = IEEE80211_AUTHENTICATE;
 671         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 672                dev->name, print_mac(mac, ifsta->bssid));
 673
 674         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 675
 676         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 677 }
 678
 679 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 680                                       struct ieee80211_supported_band *sband,
 681                                       u64 *rates)
 682 {
 683         int i, j, count;
 684         *rates = 0;
 685         count = 0;
 686         for (i = 0; i < bss->supp_rates_len; i++) {
 687                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 688
 689                 for (j = 0; j < sband->n_bitrates; j++)
 690                         if (sband->bitrates[j].bitrate == rate) {
 691                                 *rates |= BIT(j);
 692                                 count++;
 693                                 break;
 694                         }
 695         }
 696
 697         return count;
 698 }
 699
 700 static void ieee80211_send_assoc(struct net_device *dev,
 701                                  struct ieee80211_if_sta *ifsta)
 702 {
 703         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 704         struct sk_buff *skb;
 705         struct ieee80211_mgmt *mgmt;
 706         u8 *pos, *ies;
 707         int i, len, count, rates_len, supp_rates_len;
 708         u16 capab;
 709         struct ieee80211_sta_bss *bss;
 710         int wmm = 0;
 711         struct ieee80211_supported_band *sband;
 712         u64 rates = 0;
 713
 714         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 715                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 716                             ifsta->ssid_len);
 717         if (!skb) {
 718                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 719                        "frame\n", dev->name);
 720                 return;
 721         }
 722         skb_reserve(skb, local->hw.extra_tx_headroom);
 723
 724         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 725
 726         capab = ifsta->capab;
 727
 728         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 729                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 730                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 731                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 732                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 733         }
 734
 735         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 736                                    local->hw.conf.channel->center_freq,
 737                                    ifsta->ssid, ifsta->ssid_len);
 738         if (bss) {
 739                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 740                         capab |= WLAN_CAPABILITY_PRIVACY;
 741                 if (bss->wmm_ie)
 742                         wmm = 1;
 743
 744                 /* get all rates supported by the device and the AP as
 745                  * some APs don't like getting a superset of their rates
 746                  * in the association request (e.g. D-Link DAP 1353 in
 747                  * b-only mode) */
 748                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 749
 750                 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 751                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 752                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 753
 754                 ieee80211_rx_bss_put(dev, bss);
 755         } else {
 756                 rates = ~0;
 757                 rates_len = sband->n_bitrates;
 758         }
 759
 760         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 761         memset(mgmt, 0, 24);
 762         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 763         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 764         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 765
 766         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 767                 skb_put(skb, 10);
 768                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 769                                                    IEEE80211_STYPE_REASSOC_REQ);
 770                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 771                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 772                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 773                        ETH_ALEN);
 774         } else {
 775                 skb_put(skb, 4);
 776                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 777                                                    IEEE80211_STYPE_ASSOC_REQ);
 778                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 779                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 780         }
 781
 782         /* SSID */
 783         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 784         *pos++ = WLAN_EID_SSID;
 785         *pos++ = ifsta->ssid_len;
 786         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 787
 788         /* add all rates which were marked to be used above */
 789         supp_rates_len = rates_len;
 790         if (supp_rates_len > 8)
 791                 supp_rates_len = 8;
 792
 793         len = sband->n_bitrates;
 794         pos = skb_put(skb, supp_rates_len + 2);
 795         *pos++ = WLAN_EID_SUPP_RATES;
 796         *pos++ = supp_rates_len;
 797
 798         count = 0;
 799         for (i = 0; i < sband->n_bitrates; i++) {
 800                 if (BIT(i) & rates) {
 801                         int rate = sband->bitrates[i].bitrate;
 802                         *pos++ = (u8) (rate / 5);
 803                         if (++count == 8)
 804                                 break;
 805                 }
 806         }
 807
 808         if (count == 8) {
 809                 pos = skb_put(skb, rates_len - count + 2);
 810                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 811                 *pos++ = rates_len - count;
 812
 813                 for (i++; i < sband->n_bitrates; i++) {
 814                         if (BIT(i) & rates) {
 815                                 int rate = sband->bitrates[i].bitrate;
 816                                 *pos++ = (u8) (rate / 5);
 817                         }
 818                 }
 819         }
 820
 821         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 822                 /* 1. power capabilities */
 823                 pos = skb_put(skb, 4);
 824                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 825                 *pos++ = 2;
 826                 *pos++ = 0; /* min tx power */
 827                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 828
 829                 /* 2. supported channels */
 830                 /* TODO: get this in reg domain format */
 831                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 832                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 833                 *pos++ = 2 * sband->n_channels;
 834                 for (i = 0; i < sband->n_channels; i++) {
 835                         *pos++ = ieee80211_frequency_to_channel(
 836                                         sband->channels[i].center_freq);
 837                         *pos++ = 1; /* one channel in the subband*/
 838                 }
 839         }
 840
 841         if (ifsta->extra_ie) {
 842                 pos = skb_put(skb, ifsta->extra_ie_len);
 843                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 844         }
 845
 846         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 847                 pos = skb_put(skb, 9);
 848                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 849                 *pos++ = 7; /* len */
 850                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 851                 *pos++ = 0x50;
 852                 *pos++ = 0xf2;
 853                 *pos++ = 2; /* WME */
 854                 *pos++ = 0; /* WME info */
 855                 *pos++ = 1; /* WME ver */
 856                 *pos++ = 0;
 857         }
 858
 859         /* wmm support is a must to HT */
 860         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 861             sband->ht_info.ht_supported && bss->ht_add_ie) {
 862                 struct ieee80211_ht_addt_info *ht_add_info =
 863                         (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
 864                 u16 cap = sband->ht_info.cap;
 865                 __le16 tmp;
 866                 u32 flags = local->hw.conf.channel->flags;
 867
 868                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 869                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 870                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 871                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 872                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 873                         }
 874                         break;
 875                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 876                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 877                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 878                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 879                         }
 880                         break;
 881                 }
 882
 883                 tmp = cpu_to_le16(cap);
 884                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 885                 *pos++ = WLAN_EID_HT_CAPABILITY;
 886                 *pos++ = sizeof(struct ieee80211_ht_cap);
 887                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 888                 memcpy(pos, &tmp, sizeof(u16));
 889                 pos += sizeof(u16);
 890                 /* TODO: needs a define here for << 2 */
 891                 *pos++ = sband->ht_info.ampdu_factor |
 892                          (sband->ht_info.ampdu_density << 2);
 893                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 894         }
 895
 896         kfree(ifsta->assocreq_ies);
 897         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 898         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 899         if (ifsta->assocreq_ies)
 900                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 901
 902         ieee80211_sta_tx(dev, skb, 0);
 903 }
 904
 905
 906 static void ieee80211_send_deauth(struct net_device *dev,
 907                                   struct ieee80211_if_sta *ifsta, u16 reason)
 908 {
 909         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 910         struct sk_buff *skb;
 911         struct ieee80211_mgmt *mgmt;
 912
 913         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 914         if (!skb) {
 915                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 916                        "frame\n", dev->name);
 917                 return;
 918         }
 919         skb_reserve(skb, local->hw.extra_tx_headroom);
 920
 921         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 922         memset(mgmt, 0, 24);
 923         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 924         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 925         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 926         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 927                                            IEEE80211_STYPE_DEAUTH);
 928         skb_put(skb, 2);
 929         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 930
 931         ieee80211_sta_tx(dev, skb, 0);
 932 }
 933
 934
 935 static void ieee80211_send_disassoc(struct net_device *dev,
 936                                     struct ieee80211_if_sta *ifsta, u16 reason)
 937 {
 938         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 939         struct sk_buff *skb;
 940         struct ieee80211_mgmt *mgmt;
 941
 942         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 943         if (!skb) {
 944                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 945                        "frame\n", dev->name);
 946                 return;
 947         }
 948         skb_reserve(skb, local->hw.extra_tx_headroom);
 949
 950         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 951         memset(mgmt, 0, 24);
 952         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 953         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 954         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 955         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 956                                            IEEE80211_STYPE_DISASSOC);
 957         skb_put(skb, 2);
 958         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 959
 960         ieee80211_sta_tx(dev, skb, 0);
 961 }
 962
 963
 964 static int ieee80211_privacy_mismatch(struct net_device *dev,
 965                                       struct ieee80211_if_sta *ifsta)
 966 {
 967         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 968         struct ieee80211_sta_bss *bss;
 969         int bss_privacy;
 970         int wep_privacy;
 971         int privacy_invoked;
 972
 973         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 974                 return 0;
 975
 976         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 977                                    local->hw.conf.channel->center_freq,
 978                                    ifsta->ssid, ifsta->ssid_len);
 979         if (!bss)
 980                 return 0;
 981
 982         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 983         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 984         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 985
 986         ieee80211_rx_bss_put(dev, bss);
 987
 988         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 989                 return 0;
 990
 991         return 1;
 992 }
 993
 994
 995 static void ieee80211_associate(struct net_device *dev,
 996                                 struct ieee80211_if_sta *ifsta)
 997 {
 998         DECLARE_MAC_BUF(mac);
 999
1000         ifsta->assoc_tries++;
1001         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1002                 printk(KERN_DEBUG "%s: association with AP %s"
1003                        " timed out\n",
1004                        dev->name, print_mac(mac, ifsta->bssid));
1005                 ifsta->state = IEEE80211_DISABLED;
1006                 return;
1007         }
1008
1009         ifsta->state = IEEE80211_ASSOCIATE;
1010         printk(KERN_DEBUG "%s: associate with AP %s\n",
1011                dev->name, print_mac(mac, ifsta->bssid));
1012         if (ieee80211_privacy_mismatch(dev, ifsta)) {
1013                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1014                        "mixed-cell disabled - abort association\n", dev->name);
1015                 ifsta->state = IEEE80211_DISABLED;
1016                 return;
1017         }
1018
1019         ieee80211_send_assoc(dev, ifsta);
1020
1021         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1022 }
1023
1024
1025 static void ieee80211_associated(struct net_device *dev,
1026                                  struct ieee80211_if_sta *ifsta)
1027 {
1028         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1029         struct sta_info *sta;
1030         int disassoc;
1031         DECLARE_MAC_BUF(mac);
1032
1033         /* TODO: start monitoring current AP signal quality and number of
1034          * missed beacons. Scan other channels every now and then and search
1035          * for better APs. */
1036         /* TODO: remove expired BSSes */
1037
1038         ifsta->state = IEEE80211_ASSOCIATED;
1039
1040         rcu_read_lock();
1041
1042         sta = sta_info_get(local, ifsta->bssid);
1043         if (!sta) {
1044                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1045                        dev->name, print_mac(mac, ifsta->bssid));
1046                 disassoc = 1;
1047         } else {
1048                 disassoc = 0;
1049                 if (time_after(jiffies,
1050                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1051                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1052                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1053                                        "current AP %s - assume out of "
1054                                        "range\n",
1055                                        dev->name, print_mac(mac, ifsta->bssid));
1056                                 disassoc = 1;
1057                                 sta_info_unlink(&sta);
1058                         } else
1059                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1060                                                          local->scan_ssid,
1061                                                          local->scan_ssid_len);
1062                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1063                 } else {
1064                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1065                         if (time_after(jiffies, ifsta->last_probe +
1066                                        IEEE80211_PROBE_INTERVAL)) {
1067                                 ifsta->last_probe = jiffies;
1068                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1069                                                          ifsta->ssid,
1070                                                          ifsta->ssid_len);
1071                         }
1072                 }
1073         }
1074
1075         rcu_read_unlock();
1076
1077         if (disassoc && sta)
1078                 sta_info_destroy(sta);
1079
1080         if (disassoc) {
1081                 ifsta->state = IEEE80211_DISABLED;
1082                 ieee80211_set_associated(dev, ifsta, 0);
1083         } else {
1084                 mod_timer(&ifsta->timer, jiffies +
1085                                       IEEE80211_MONITORING_INTERVAL);
1086         }
1087 }
1088
1089
1090 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1091                                      u8 *ssid, size_t ssid_len)
1092 {
1093         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1094         struct ieee80211_supported_band *sband;
1095         struct sk_buff *skb;
1096         struct ieee80211_mgmt *mgmt;
1097         u8 *pos, *supp_rates, *esupp_rates = NULL;
1098         int i;
1099
1100         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1101         if (!skb) {
1102                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1103                        "request\n", dev->name);
1104                 return;
1105         }
1106         skb_reserve(skb, local->hw.extra_tx_headroom);
1107
1108         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1109         memset(mgmt, 0, 24);
1110         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1111                                            IEEE80211_STYPE_PROBE_REQ);
1112         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1113         if (dst) {
1114                 memcpy(mgmt->da, dst, ETH_ALEN);
1115                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1116         } else {
1117                 memset(mgmt->da, 0xff, ETH_ALEN);
1118                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1119         }
1120         pos = skb_put(skb, 2 + ssid_len);
1121         *pos++ = WLAN_EID_SSID;
1122         *pos++ = ssid_len;
1123         memcpy(pos, ssid, ssid_len);
1124
1125         supp_rates = skb_put(skb, 2);
1126         supp_rates[0] = WLAN_EID_SUPP_RATES;
1127         supp_rates[1] = 0;
1128         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1129
1130         for (i = 0; i < sband->n_bitrates; i++) {
1131                 struct ieee80211_rate *rate = &sband->bitrates[i];
1132                 if (esupp_rates) {
1133                         pos = skb_put(skb, 1);
1134                         esupp_rates[1]++;
1135                 } else if (supp_rates[1] == 8) {
1136                         esupp_rates = skb_put(skb, 3);
1137                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1138                         esupp_rates[1] = 1;
1139                         pos = &esupp_rates[2];
1140                 } else {
1141                         pos = skb_put(skb, 1);
1142                         supp_rates[1]++;
1143                 }
1144                 *pos = rate->bitrate / 5;
1145         }
1146
1147         ieee80211_sta_tx(dev, skb, 0);
1148 }
1149
1150
1151 static int ieee80211_sta_wep_configured(struct net_device *dev)
1152 {
1153         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1154         if (!sdata || !sdata->default_key ||
1155             sdata->default_key->conf.alg != ALG_WEP)
1156                 return 0;
1157         return 1;
1158 }
1159
1160
1161 static void ieee80211_auth_completed(struct net_device *dev,
1162                                      struct ieee80211_if_sta *ifsta)
1163 {
1164         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1165         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1166         ieee80211_associate(dev, ifsta);
1167 }
1168
1169
1170 static void ieee80211_auth_challenge(struct net_device *dev,
1171                                      struct ieee80211_if_sta *ifsta,
1172                                      struct ieee80211_mgmt *mgmt,
1173                                      size_t len)
1174 {
1175         u8 *pos;
1176         struct ieee802_11_elems elems;
1177
1178         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1179         pos = mgmt->u.auth.variable;
1180         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1181         if (!elems.challenge) {
1182                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1183                        "frame\n", dev->name);
1184                 return;
1185         }
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                 if (net_ratelimit())
1368                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1369                                         tid);
1370                 goto end;
1371         }
1372         /* rx timer */
1373         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1374                                 sta_rx_agg_session_timer_expired;
1375         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1376                                 (unsigned long)&sta->timer_to_tid[tid];
1377         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1378
1379         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1380
1381         /* prepare reordering buffer */
1382         tid_agg_rx->reorder_buf =
1383                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1384         if (!tid_agg_rx->reorder_buf) {
1385                 if (net_ratelimit())
1386                         printk(KERN_ERR "can not allocate reordering buffer "
1387                                "to tid %d\n", tid);
1388                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1389                 goto end;
1390         }
1391         memset(tid_agg_rx->reorder_buf, 0,
1392                 buf_size * sizeof(struct sk_buff *));
1393
1394         if (local->ops->ampdu_action)
1395                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1396                                                sta->addr, tid, &start_seq_num);
1397 #ifdef CONFIG_MAC80211_HT_DEBUG
1398         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1399 #endif /* CONFIG_MAC80211_HT_DEBUG */
1400
1401         if (ret) {
1402                 kfree(tid_agg_rx->reorder_buf);
1403                 kfree(tid_agg_rx);
1404                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1405                 goto end;
1406         }
1407
1408         /* change state and send addba resp */
1409         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1410         tid_agg_rx->dialog_token = dialog_token;
1411         tid_agg_rx->ssn = start_seq_num;
1412         tid_agg_rx->head_seq_num = start_seq_num;
1413         tid_agg_rx->buf_size = buf_size;
1414         tid_agg_rx->timeout = timeout;
1415         tid_agg_rx->stored_mpdu_num = 0;
1416         status = WLAN_STATUS_SUCCESS;
1417 end:
1418         spin_unlock_bh(&sta->lock);
1419
1420 end_no_lock:
1421         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1422                                   dialog_token, status, 1, buf_size, timeout);
1423         rcu_read_unlock();
1424 }
1425
1426 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1427                                              struct ieee80211_mgmt *mgmt,
1428                                              size_t len)
1429 {
1430         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1431         struct ieee80211_hw *hw = &local->hw;
1432         struct sta_info *sta;
1433         u16 capab;
1434         u16 tid;
1435         u8 *state;
1436
1437         rcu_read_lock();
1438
1439         sta = sta_info_get(local, mgmt->sa);
1440         if (!sta) {
1441                 rcu_read_unlock();
1442                 return;
1443         }
1444
1445         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1446         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1447
1448         state = &sta->ampdu_mlme.tid_state_tx[tid];
1449
1450         spin_lock_bh(&sta->lock);
1451
1452         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1453                 spin_unlock_bh(&sta->lock);
1454                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1455                         "%d\n", *state);
1456                 goto addba_resp_exit;
1457         }
1458
1459         if (mgmt->u.action.u.addba_resp.dialog_token !=
1460                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1461                 spin_unlock_bh(&sta->lock);
1462 #ifdef CONFIG_MAC80211_HT_DEBUG
1463                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1464 #endif /* CONFIG_MAC80211_HT_DEBUG */
1465                 goto addba_resp_exit;
1466         }
1467
1468         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1469 #ifdef CONFIG_MAC80211_HT_DEBUG
1470         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1471 #endif /* CONFIG_MAC80211_HT_DEBUG */
1472         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1473                         == WLAN_STATUS_SUCCESS) {
1474                 if (*state & HT_ADDBA_RECEIVED_MSK)
1475                         printk(KERN_DEBUG "double addBA response\n");
1476
1477                 *state |= HT_ADDBA_RECEIVED_MSK;
1478                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1479
1480                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1481                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1482                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1483                 }
1484
1485                 spin_unlock_bh(&sta->lock);
1486                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1487         } else {
1488                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1489
1490                 sta->ampdu_mlme.addba_req_num[tid]++;
1491                 /* this will allow the state check in stop_BA_session */
1492                 *state = HT_AGG_STATE_OPERATIONAL;
1493                 spin_unlock_bh(&sta->lock);
1494                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1495                                              WLAN_BACK_INITIATOR);
1496         }
1497
1498 addba_resp_exit:
1499         rcu_read_unlock();
1500 }
1501
1502 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1503                           u16 initiator, u16 reason_code)
1504 {
1505         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1506         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1507         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1508         struct sk_buff *skb;
1509         struct ieee80211_mgmt *mgmt;
1510         u16 params;
1511
1512         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1513
1514         if (!skb) {
1515                 printk(KERN_ERR "%s: failed to allocate buffer "
1516                                         "for delba frame\n", dev->name);
1517                 return;
1518         }
1519
1520         skb_reserve(skb, local->hw.extra_tx_headroom);
1521         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1522         memset(mgmt, 0, 24);
1523         memcpy(mgmt->da, da, ETH_ALEN);
1524         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1525         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1526                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1527         else
1528                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1529         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1530                                         IEEE80211_STYPE_ACTION);
1531
1532         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1533
1534         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1535         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1536         params = (u16)(initiator << 11);        /* bit 11 initiator */
1537         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1538
1539         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1540         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1541
1542         ieee80211_sta_tx(dev, skb, 0);
1543 }
1544
1545 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1546                                         u16 initiator, u16 reason)
1547 {
1548         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1549         struct ieee80211_hw *hw = &local->hw;
1550         struct sta_info *sta;
1551         int ret, i;
1552         DECLARE_MAC_BUF(mac);
1553
1554         rcu_read_lock();
1555
1556         sta = sta_info_get(local, ra);
1557         if (!sta) {
1558                 rcu_read_unlock();
1559                 return;
1560         }
1561
1562         /* check if TID is in operational state */
1563         spin_lock_bh(&sta->lock);
1564         if (sta->ampdu_mlme.tid_state_rx[tid]
1565                                 != HT_AGG_STATE_OPERATIONAL) {
1566                 spin_unlock_bh(&sta->lock);
1567                 rcu_read_unlock();
1568                 return;
1569         }
1570         sta->ampdu_mlme.tid_state_rx[tid] =
1571                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1572                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1573         spin_unlock_bh(&sta->lock);
1574
1575         /* stop HW Rx aggregation. ampdu_action existence
1576          * already verified in session init so we add the BUG_ON */
1577         BUG_ON(!local->ops->ampdu_action);
1578
1579 #ifdef CONFIG_MAC80211_HT_DEBUG
1580         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1581                                 print_mac(mac, ra), tid);
1582 #endif /* CONFIG_MAC80211_HT_DEBUG */
1583
1584         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1585                                         ra, tid, NULL);
1586         if (ret)
1587                 printk(KERN_DEBUG "HW problem - can not stop rx "
1588                                 "aggergation for tid %d\n", tid);
1589
1590         /* shutdown timer has not expired */
1591         if (initiator != WLAN_BACK_TIMER)
1592                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1593
1594         /* check if this is a self generated aggregation halt */
1595         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1596                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1597
1598         /* free the reordering buffer */
1599         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1600                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1601                         /* release the reordered frames */
1602                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1603                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1604                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1605                 }
1606         }
1607         /* free resources */
1608         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1609         kfree(sta->ampdu_mlme.tid_rx[tid]);
1610         sta->ampdu_mlme.tid_rx[tid] = NULL;
1611         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1612
1613         rcu_read_unlock();
1614 }
1615
1616
1617 static void ieee80211_sta_process_delba(struct net_device *dev,
1618                         struct ieee80211_mgmt *mgmt, size_t len)
1619 {
1620         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1621         struct sta_info *sta;
1622         u16 tid, params;
1623         u16 initiator;
1624         DECLARE_MAC_BUF(mac);
1625
1626         rcu_read_lock();
1627
1628         sta = sta_info_get(local, mgmt->sa);
1629         if (!sta) {
1630                 rcu_read_unlock();
1631                 return;
1632         }
1633
1634         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1635         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1636         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1637
1638 #ifdef CONFIG_MAC80211_HT_DEBUG
1639         if (net_ratelimit())
1640                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1641                         print_mac(mac, mgmt->sa),
1642                         initiator ? "initiator" : "recipient", tid,
1643                         mgmt->u.action.u.delba.reason_code);
1644 #endif /* CONFIG_MAC80211_HT_DEBUG */
1645
1646         if (initiator == WLAN_BACK_INITIATOR)
1647                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1648                                                  WLAN_BACK_INITIATOR, 0);
1649         else { /* WLAN_BACK_RECIPIENT */
1650                 spin_lock_bh(&sta->lock);
1651                 sta->ampdu_mlme.tid_state_tx[tid] =
1652                                 HT_AGG_STATE_OPERATIONAL;
1653                 spin_unlock_bh(&sta->lock);
1654                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1655                                              WLAN_BACK_RECIPIENT);
1656         }
1657         rcu_read_unlock();
1658 }
1659
1660 /*
1661  * After sending add Block Ack request we activated a timer until
1662  * add Block Ack response will arrive from the recipient.
1663  * If this timer expires sta_addba_resp_timer_expired will be executed.
1664  */
1665 void sta_addba_resp_timer_expired(unsigned long data)
1666 {
1667         /* not an elegant detour, but there is no choice as the timer passes
1668          * only one argument, and both sta_info and TID are needed, so init
1669          * flow in sta_info_create gives the TID as data, while the timer_to_id
1670          * array gives the sta through container_of */
1671         u16 tid = *(u8 *)data;
1672         struct sta_info *temp_sta = container_of((void *)data,
1673                 struct sta_info, timer_to_tid[tid]);
1674
1675         struct ieee80211_local *local = temp_sta->local;
1676         struct ieee80211_hw *hw = &local->hw;
1677         struct sta_info *sta;
1678         u8 *state;
1679
1680         rcu_read_lock();
1681
1682         sta = sta_info_get(local, temp_sta->addr);
1683         if (!sta) {
1684                 rcu_read_unlock();
1685                 return;
1686         }
1687
1688         state = &sta->ampdu_mlme.tid_state_tx[tid];
1689         /* check if the TID waits for addBA response */
1690         spin_lock_bh(&sta->lock);
1691         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1692                 spin_unlock_bh(&sta->lock);
1693                 *state = HT_AGG_STATE_IDLE;
1694                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1695                                 "expecting addBA response there", tid);
1696                 goto timer_expired_exit;
1697         }
1698
1699         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1700
1701         /* go through the state check in stop_BA_session */
1702         *state = HT_AGG_STATE_OPERATIONAL;
1703         spin_unlock_bh(&sta->lock);
1704         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1705                                      WLAN_BACK_INITIATOR);
1706
1707 timer_expired_exit:
1708         rcu_read_unlock();
1709 }
1710
1711 /*
1712  * After accepting the AddBA Request we activated a timer,
1713  * resetting it after each frame that arrives from the originator.
1714  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1715  */
1716 static void sta_rx_agg_session_timer_expired(unsigned long data)
1717 {
1718         /* not an elegant detour, but there is no choice as the timer passes
1719          * only one argument, and various sta_info are needed here, so init
1720          * flow in sta_info_create gives the TID as data, while the timer_to_id
1721          * array gives the sta through container_of */
1722         u8 *ptid = (u8 *)data;
1723         u8 *timer_to_id = ptid - *ptid;
1724         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1725                                          timer_to_tid[0]);
1726
1727         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
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                 printk(KERN_DEBUG "%s: authentication frame received from "
1824                        "%s, but not in authenticate state - ignored\n",
1825                        dev->name, print_mac(mac, mgmt->sa));
1826                 return;
1827         }
1828
1829         if (len < 24 + 6) {
1830                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1831                        "received from %s - ignored\n",
1832                        dev->name, len, print_mac(mac, mgmt->sa));
1833                 return;
1834         }
1835
1836         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1837             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1838                 printk(KERN_DEBUG "%s: authentication frame received from "
1839                        "unknown AP (SA=%s BSSID=%s) - "
1840                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1841                        print_mac(mac, mgmt->bssid));
1842                 return;
1843         }
1844
1845         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1846             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1847                 printk(KERN_DEBUG "%s: authentication frame received from "
1848                        "unknown BSSID (SA=%s BSSID=%s) - "
1849                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1850                        print_mac(mac, mgmt->bssid));
1851                 return;
1852         }
1853
1854         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1855         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1856         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1857
1858         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1859                "transaction=%d status=%d)\n",
1860                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1861                auth_transaction, status_code);
1862
1863         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1864                 /*
1865                  * IEEE 802.11 standard does not require authentication in IBSS
1866                  * networks and most implementations do not seem to use it.
1867                  * However, try to reply to authentication attempts if someone
1868                  * has actually implemented this.
1869                  */
1870                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1871                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1872                                "frame (alg=%d transaction=%d)\n",
1873                                dev->name, auth_alg, auth_transaction);
1874                         return;
1875                 }
1876                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1877         }
1878
1879         if (auth_alg != ifsta->auth_alg ||
1880             auth_transaction != ifsta->auth_transaction) {
1881                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1882                        "(alg=%d transaction=%d)\n",
1883                        dev->name, auth_alg, auth_transaction);
1884                 return;
1885         }
1886
1887         if (status_code != WLAN_STATUS_SUCCESS) {
1888                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1889                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1890                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1891                         u8 algs[3];
1892                         const int num_algs = ARRAY_SIZE(algs);
1893                         int i, pos;
1894                         algs[0] = algs[1] = algs[2] = 0xff;
1895                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1896                                 algs[0] = WLAN_AUTH_OPEN;
1897                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1898                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1899                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1900                                 algs[2] = WLAN_AUTH_LEAP;
1901                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1902                                 pos = 0;
1903                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1904                                 pos = 1;
1905                         else
1906                                 pos = 2;
1907                         for (i = 0; i < num_algs; i++) {
1908                                 pos++;
1909                                 if (pos >= num_algs)
1910                                         pos = 0;
1911                                 if (algs[pos] == ifsta->auth_alg ||
1912                                     algs[pos] == 0xff)
1913                                         continue;
1914                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1915                                     !ieee80211_sta_wep_configured(dev))
1916                                         continue;
1917                                 ifsta->auth_alg = algs[pos];
1918                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1919                                        "next try\n",
1920                                        dev->name, ifsta->auth_alg);
1921                                 break;
1922                         }
1923                 }
1924                 return;
1925         }
1926
1927         switch (ifsta->auth_alg) {
1928         case WLAN_AUTH_OPEN:
1929         case WLAN_AUTH_LEAP:
1930                 ieee80211_auth_completed(dev, ifsta);
1931                 break;
1932         case WLAN_AUTH_SHARED_KEY:
1933                 if (ifsta->auth_transaction == 4)
1934                         ieee80211_auth_completed(dev, ifsta);
1935                 else
1936                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1937                 break;
1938         }
1939 }
1940
1941
1942 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1943                                      struct ieee80211_if_sta *ifsta,
1944                                      struct ieee80211_mgmt *mgmt,
1945                                      size_t len)
1946 {
1947         u16 reason_code;
1948         DECLARE_MAC_BUF(mac);
1949
1950         if (len < 24 + 2) {
1951                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1952                        "received from %s - ignored\n",
1953                        dev->name, len, print_mac(mac, mgmt->sa));
1954                 return;
1955         }
1956
1957         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1958                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1959                        "unknown AP (SA=%s BSSID=%s) - "
1960                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1961                        print_mac(mac, mgmt->bssid));
1962                 return;
1963         }
1964
1965         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1966
1967         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1968                " (reason=%d)\n",
1969                dev->name, print_mac(mac, mgmt->sa), reason_code);
1970
1971         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1972                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1973
1974         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1975             ifsta->state == IEEE80211_ASSOCIATE ||
1976             ifsta->state == IEEE80211_ASSOCIATED) {
1977                 ifsta->state = IEEE80211_AUTHENTICATE;
1978                 mod_timer(&ifsta->timer, jiffies +
1979                                       IEEE80211_RETRY_AUTH_INTERVAL);
1980         }
1981
1982         ieee80211_set_disassoc(dev, ifsta, 1);
1983         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1984 }
1985
1986
1987 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1988                                        struct ieee80211_if_sta *ifsta,
1989                                        struct ieee80211_mgmt *mgmt,
1990                                        size_t len)
1991 {
1992         u16 reason_code;
1993         DECLARE_MAC_BUF(mac);
1994
1995         if (len < 24 + 2) {
1996                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1997                        "received from %s - ignored\n",
1998                        dev->name, len, print_mac(mac, mgmt->sa));
1999                 return;
2000         }
2001
2002         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
2003                 printk(KERN_DEBUG "%s: disassociation frame received from "
2004                        "unknown AP (SA=%s BSSID=%s) - "
2005                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
2006                        print_mac(mac, mgmt->bssid));
2007                 return;
2008         }
2009
2010         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2011
2012         printk(KERN_DEBUG "%s: RX disassociation from %s"
2013                " (reason=%d)\n",
2014                dev->name, print_mac(mac, mgmt->sa), reason_code);
2015
2016         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
2017                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
2018
2019         if (ifsta->state == IEEE80211_ASSOCIATED) {
2020                 ifsta->state = IEEE80211_ASSOCIATE;
2021                 mod_timer(&ifsta->timer, jiffies +
2022                                       IEEE80211_RETRY_AUTH_INTERVAL);
2023         }
2024
2025         ieee80211_set_disassoc(dev, ifsta, 0);
2026 }
2027
2028
2029 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2030                                          struct ieee80211_if_sta *ifsta,
2031                                          struct ieee80211_mgmt *mgmt,
2032                                          size_t len,
2033                                          int reassoc)
2034 {
2035         struct ieee80211_local *local = sdata->local;
2036         struct net_device *dev = sdata->dev;
2037         struct ieee80211_supported_band *sband;
2038         struct sta_info *sta;
2039         u64 rates, basic_rates;
2040         u16 capab_info, status_code, aid;
2041         struct ieee802_11_elems elems;
2042         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2043         u8 *pos;
2044         int i, j;
2045         DECLARE_MAC_BUF(mac);
2046         bool have_higher_than_11mbit = false;
2047
2048         /* AssocResp and ReassocResp have identical structure, so process both
2049          * of them in this function. */
2050
2051         if (ifsta->state != IEEE80211_ASSOCIATE) {
2052                 printk(KERN_DEBUG "%s: association frame received from "
2053                        "%s, but not in associate state - ignored\n",
2054                        dev->name, print_mac(mac, mgmt->sa));
2055                 return;
2056         }
2057
2058         if (len < 24 + 6) {
2059                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
2060                        "received from %s - ignored\n",
2061                        dev->name, len, print_mac(mac, mgmt->sa));
2062                 return;
2063         }
2064
2065         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
2066                 printk(KERN_DEBUG "%s: association frame received from "
2067                        "unknown AP (SA=%s BSSID=%s) - "
2068                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
2069                        print_mac(mac, mgmt->bssid));
2070                 return;
2071         }
2072
2073         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2074         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2075         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2076
2077         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2078                "status=%d aid=%d)\n",
2079                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2080                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2081
2082         if (status_code != WLAN_STATUS_SUCCESS) {
2083                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2084                        dev->name, status_code);
2085                 /* if this was a reassociation, ensure we try a "full"
2086                  * association next time. This works around some broken APs
2087                  * which do not correctly reject reassociation requests. */
2088                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2089                 return;
2090         }
2091
2092         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2093                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2094                        "set\n", dev->name, aid);
2095         aid &= ~(BIT(15) | BIT(14));
2096
2097         pos = mgmt->u.assoc_resp.variable;
2098         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2099
2100         if (!elems.supp_rates) {
2101                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2102                        dev->name);
2103                 return;
2104         }
2105
2106         printk(KERN_DEBUG "%s: associated\n", dev->name);
2107         ifsta->aid = aid;
2108         ifsta->ap_capab = capab_info;
2109
2110         kfree(ifsta->assocresp_ies);
2111         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2112         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2113         if (ifsta->assocresp_ies)
2114                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2115
2116         rcu_read_lock();
2117
2118         /* Add STA entry for the AP */
2119         sta = sta_info_get(local, ifsta->bssid);
2120         if (!sta) {
2121                 struct ieee80211_sta_bss *bss;
2122                 int err;
2123
2124                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2125                 if (!sta) {
2126                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2127                                " the AP\n", dev->name);
2128                         rcu_read_unlock();
2129                         return;
2130                 }
2131                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2132                                            local->hw.conf.channel->center_freq,
2133                                            ifsta->ssid, ifsta->ssid_len);
2134                 if (bss) {
2135                         sta->last_signal = bss->signal;
2136                         sta->last_qual = bss->qual;
2137                         sta->last_noise = bss->noise;
2138                         ieee80211_rx_bss_put(dev, bss);
2139                 }
2140
2141                 err = sta_info_insert(sta);
2142                 if (err) {
2143                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2144                                " the AP (error %d)\n", dev->name, err);
2145                         rcu_read_unlock();
2146                         return;
2147                 }
2148         }
2149
2150         /*
2151          * FIXME: Do we really need to update the sta_info's information here?
2152          *        We already know about the AP (we found it in our list) so it
2153          *        should already be filled with the right info, no?
2154          *        As is stands, all this is racy because typically we assume
2155          *        the information that is filled in here (except flags) doesn't
2156          *        change while a STA structure is alive. As such, it should move
2157          *        to between the sta_info_alloc() and sta_info_insert() above.
2158          */
2159
2160         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2161                            WLAN_STA_AUTHORIZED);
2162
2163         rates = 0;
2164         basic_rates = 0;
2165         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2166
2167         for (i = 0; i < elems.supp_rates_len; i++) {
2168                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2169
2170                 if (rate > 110)
2171                         have_higher_than_11mbit = true;
2172
2173                 for (j = 0; j < sband->n_bitrates; j++) {
2174                         if (sband->bitrates[j].bitrate == rate)
2175                                 rates |= BIT(j);
2176                         if (elems.supp_rates[i] & 0x80)
2177                                 basic_rates |= BIT(j);
2178                 }
2179         }
2180
2181         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2182                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2183
2184                 if (rate > 110)
2185                         have_higher_than_11mbit = true;
2186
2187                 for (j = 0; j < sband->n_bitrates; j++) {
2188                         if (sband->bitrates[j].bitrate == rate)
2189                                 rates |= BIT(j);
2190                         if (elems.ext_supp_rates[i] & 0x80)
2191                                 basic_rates |= BIT(j);
2192                 }
2193         }
2194
2195         sta->supp_rates[local->hw.conf.channel->band] = rates;
2196         sdata->basic_rates = basic_rates;
2197
2198         /* cf. IEEE 802.11 9.2.12 */
2199         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2200             have_higher_than_11mbit)
2201                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2202         else
2203                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2204
2205         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2206             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2207                 struct ieee80211_ht_bss_info bss_info;
2208                 ieee80211_ht_cap_ie_to_ht_info(
2209                                 (struct ieee80211_ht_cap *)
2210                                 elems.ht_cap_elem, &sta->ht_info);
2211                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2212                                 (struct ieee80211_ht_addt_info *)
2213                                 elems.ht_info_elem, &bss_info);
2214                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2215         }
2216
2217         rate_control_rate_init(sta, local);
2218
2219         if (elems.wmm_param) {
2220                 set_sta_flags(sta, WLAN_STA_WME);
2221                 rcu_read_unlock();
2222                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2223                                          elems.wmm_param_len);
2224         } else
2225                 rcu_read_unlock();
2226
2227         /* set AID and assoc capability,
2228          * ieee80211_set_associated() will tell the driver */
2229         bss_conf->aid = aid;
2230         bss_conf->assoc_capability = capab_info;
2231         ieee80211_set_associated(dev, ifsta, 1);
2232
2233         ieee80211_associated(dev, ifsta);
2234 }
2235
2236
2237 /* Caller must hold local->sta_bss_lock */
2238 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2239                                         struct ieee80211_sta_bss *bss)
2240 {
2241         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2242         u8 hash_idx;
2243
2244         if (bss_mesh_cfg(bss))
2245                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2246                                         bss_mesh_id_len(bss));
2247         else
2248                 hash_idx = STA_HASH(bss->bssid);
2249
2250         bss->hnext = local->sta_bss_hash[hash_idx];
2251         local->sta_bss_hash[hash_idx] = bss;
2252 }
2253
2254
2255 /* Caller must hold local->sta_bss_lock */
2256 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2257                                         struct ieee80211_sta_bss *bss)
2258 {
2259         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2260         struct ieee80211_sta_bss *b, *prev = NULL;
2261         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2262         while (b) {
2263                 if (b == bss) {
2264                         if (!prev)
2265                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2266                                         bss->hnext;
2267                         else
2268                                 prev->hnext = bss->hnext;
2269                         break;
2270                 }
2271                 prev = b;
2272                 b = b->hnext;
2273         }
2274 }
2275
2276
2277 static struct ieee80211_sta_bss *
2278 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2279                      u8 *ssid, u8 ssid_len)
2280 {
2281         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2282         struct ieee80211_sta_bss *bss;
2283
2284         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2285         if (!bss)
2286                 return NULL;
2287         atomic_inc(&bss->users);
2288         atomic_inc(&bss->users);
2289         memcpy(bss->bssid, bssid, ETH_ALEN);
2290         bss->freq = freq;
2291         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2292                 memcpy(bss->ssid, ssid, ssid_len);
2293                 bss->ssid_len = ssid_len;
2294         }
2295
2296         spin_lock_bh(&local->sta_bss_lock);
2297         /* TODO: order by RSSI? */
2298         list_add_tail(&bss->list, &local->sta_bss_list);
2299         __ieee80211_rx_bss_hash_add(dev, bss);
2300         spin_unlock_bh(&local->sta_bss_lock);
2301         return bss;
2302 }
2303
2304 static struct ieee80211_sta_bss *
2305 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2306                      u8 *ssid, u8 ssid_len)
2307 {
2308         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2309         struct ieee80211_sta_bss *bss;
2310
2311         spin_lock_bh(&local->sta_bss_lock);
2312         bss = local->sta_bss_hash[STA_HASH(bssid)];
2313         while (bss) {
2314                 if (!bss_mesh_cfg(bss) &&
2315                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2316                     bss->freq == freq &&
2317                     bss->ssid_len == ssid_len &&
2318                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2319                         atomic_inc(&bss->users);
2320                         break;
2321                 }
2322                 bss = bss->hnext;
2323         }
2324         spin_unlock_bh(&local->sta_bss_lock);
2325         return bss;
2326 }
2327
2328 #ifdef CONFIG_MAC80211_MESH
2329 static struct ieee80211_sta_bss *
2330 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2331                           u8 *mesh_cfg, int freq)
2332 {
2333         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2334         struct ieee80211_sta_bss *bss;
2335
2336         spin_lock_bh(&local->sta_bss_lock);
2337         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2338         while (bss) {
2339                 if (bss_mesh_cfg(bss) &&
2340                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2341                     bss->freq == freq &&
2342                     mesh_id_len == bss->mesh_id_len &&
2343                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2344                                                  mesh_id_len))) {
2345                         atomic_inc(&bss->users);
2346                         break;
2347                 }
2348                 bss = bss->hnext;
2349         }
2350         spin_unlock_bh(&local->sta_bss_lock);
2351         return bss;
2352 }
2353
2354 static struct ieee80211_sta_bss *
2355 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2356                           u8 *mesh_cfg, int mesh_config_len, int freq)
2357 {
2358         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2359         struct ieee80211_sta_bss *bss;
2360
2361         if (mesh_config_len != MESH_CFG_LEN)
2362                 return NULL;
2363
2364         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2365         if (!bss)
2366                 return NULL;
2367
2368         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2369         if (!bss->mesh_cfg) {
2370                 kfree(bss);
2371                 return NULL;
2372         }
2373
2374         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2375                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2376                 if (!bss->mesh_id) {
2377                         kfree(bss->mesh_cfg);
2378                         kfree(bss);
2379                         return NULL;
2380                 }
2381                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2382         }
2383
2384         atomic_inc(&bss->users);
2385         atomic_inc(&bss->users);
2386         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2387         bss->mesh_id_len = mesh_id_len;
2388         bss->freq = freq;
2389         spin_lock_bh(&local->sta_bss_lock);
2390         /* TODO: order by RSSI? */
2391         list_add_tail(&bss->list, &local->sta_bss_list);
2392         __ieee80211_rx_bss_hash_add(dev, bss);
2393         spin_unlock_bh(&local->sta_bss_lock);
2394         return bss;
2395 }
2396 #endif
2397
2398 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2399 {
2400         kfree(bss->wpa_ie);
2401         kfree(bss->rsn_ie);
2402         kfree(bss->wmm_ie);
2403         kfree(bss->ht_ie);
2404         kfree(bss->ht_add_ie);
2405         kfree(bss_mesh_id(bss));
2406         kfree(bss_mesh_cfg(bss));
2407         kfree(bss);
2408 }
2409
2410
2411 static void ieee80211_rx_bss_put(struct net_device *dev,
2412                                  struct ieee80211_sta_bss *bss)
2413 {
2414         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2415
2416         local_bh_disable();
2417         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2418                 local_bh_enable();
2419                 return;
2420         }
2421
2422         __ieee80211_rx_bss_hash_del(dev, bss);
2423         list_del(&bss->list);
2424         spin_unlock_bh(&local->sta_bss_lock);
2425         ieee80211_rx_bss_free(bss);
2426 }
2427
2428
2429 void ieee80211_rx_bss_list_init(struct net_device *dev)
2430 {
2431         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2432         spin_lock_init(&local->sta_bss_lock);
2433         INIT_LIST_HEAD(&local->sta_bss_list);
2434 }
2435
2436
2437 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2438 {
2439         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2440         struct ieee80211_sta_bss *bss, *tmp;
2441
2442         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2443                 ieee80211_rx_bss_put(dev, bss);
2444 }
2445
2446
2447 static int ieee80211_sta_join_ibss(struct net_device *dev,
2448                                    struct ieee80211_if_sta *ifsta,
2449                                    struct ieee80211_sta_bss *bss)
2450 {
2451         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2452         int res, rates, i, j;
2453         struct sk_buff *skb;
2454         struct ieee80211_mgmt *mgmt;
2455         struct ieee80211_tx_info *control;
2456         struct rate_selection ratesel;
2457         u8 *pos;
2458         struct ieee80211_sub_if_data *sdata;
2459         struct ieee80211_supported_band *sband;
2460         union iwreq_data wrqu;
2461
2462         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2463
2464         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2465
2466         /* Remove possible STA entries from other IBSS networks. */
2467         sta_info_flush_delayed(sdata);
2468
2469         if (local->ops->reset_tsf) {
2470                 /* Reset own TSF to allow time synchronization work. */
2471                 local->ops->reset_tsf(local_to_hw(local));
2472         }
2473         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2474         res = ieee80211_if_config(dev);
2475         if (res)
2476                 return res;
2477
2478         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2479
2480         sdata->drop_unencrypted = bss->capability &
2481                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2482
2483         res = ieee80211_set_freq(dev, bss->freq);
2484
2485         if (res)
2486                 return res;
2487
2488         /* Set beacon template */
2489         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2490         do {
2491                 if (!skb)
2492                         break;
2493
2494                 skb_reserve(skb, local->hw.extra_tx_headroom);
2495
2496                 mgmt = (struct ieee80211_mgmt *)
2497                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2498                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2499                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2500                                                    IEEE80211_STYPE_BEACON);
2501                 memset(mgmt->da, 0xff, ETH_ALEN);
2502                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2503                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2504                 mgmt->u.beacon.beacon_int =
2505                         cpu_to_le16(local->hw.conf.beacon_int);
2506                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2507
2508                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2509                 *pos++ = WLAN_EID_SSID;
2510                 *pos++ = ifsta->ssid_len;
2511                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2512
2513                 rates = bss->supp_rates_len;
2514                 if (rates > 8)
2515                         rates = 8;
2516                 pos = skb_put(skb, 2 + rates);
2517                 *pos++ = WLAN_EID_SUPP_RATES;
2518                 *pos++ = rates;
2519                 memcpy(pos, bss->supp_rates, rates);
2520
2521                 if (bss->band == IEEE80211_BAND_2GHZ) {
2522                         pos = skb_put(skb, 2 + 1);
2523                         *pos++ = WLAN_EID_DS_PARAMS;
2524                         *pos++ = 1;
2525                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2526                 }
2527
2528                 pos = skb_put(skb, 2 + 2);
2529                 *pos++ = WLAN_EID_IBSS_PARAMS;
2530                 *pos++ = 2;
2531                 /* FIX: set ATIM window based on scan results */
2532                 *pos++ = 0;
2533                 *pos++ = 0;
2534
2535                 if (bss->supp_rates_len > 8) {
2536                         rates = bss->supp_rates_len - 8;
2537                         pos = skb_put(skb, 2 + rates);
2538                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2539                         *pos++ = rates;
2540                         memcpy(pos, &bss->supp_rates[8], rates);
2541                 }
2542
2543                 control = IEEE80211_SKB_CB(skb);
2544
2545                 rate_control_get_rate(dev, sband, skb, &ratesel);
2546                 if (ratesel.rate_idx < 0) {
2547                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2548                                "for IBSS beacon\n", dev->name);
2549                         break;
2550                 }
2551                 control->control.vif = &sdata->vif;
2552                 control->tx_rate_idx = ratesel.rate_idx;
2553                 if (sdata->bss_conf.use_short_preamble &&
2554                     sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2555                         control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2556                 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2557                 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2558                 control->control.retry_limit = 1;
2559
2560                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2561                 if (ifsta->probe_resp) {
2562                         mgmt = (struct ieee80211_mgmt *)
2563                                 ifsta->probe_resp->data;
2564                         mgmt->frame_control =
2565                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2566                                              IEEE80211_STYPE_PROBE_RESP);
2567                 } else {
2568                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2569                                "template for IBSS\n", dev->name);
2570                 }
2571
2572                 if (local->ops->beacon_update &&
2573                     local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2574                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2575                                "template\n", dev->name);
2576                         skb = NULL;
2577                 }
2578
2579                 rates = 0;
2580                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2581                 for (i = 0; i < bss->supp_rates_len; i++) {
2582                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2583                         for (j = 0; j < sband->n_bitrates; j++)
2584                                 if (sband->bitrates[j].bitrate == bitrate)
2585                                         rates |= BIT(j);
2586                 }
2587                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2588
2589                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2590         } while (0);
2591
2592         if (skb) {
2593                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2594                        "template\n", dev->name);
2595                 dev_kfree_skb(skb);
2596         }
2597
2598         ifsta->state = IEEE80211_IBSS_JOINED;
2599         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2600
2601         memset(&wrqu, 0, sizeof(wrqu));
2602         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2603         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2604
2605         return res;
2606 }
2607
2608 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2609                             struct ieee802_11_elems *elems,
2610                             enum ieee80211_band band)
2611 {
2612         struct ieee80211_supported_band *sband;
2613         struct ieee80211_rate *bitrates;
2614         size_t num_rates;
2615         u64 supp_rates;
2616         int i, j;
2617         sband = local->hw.wiphy->bands[band];
2618
2619         if (!sband) {
2620                 WARN_ON(1);
2621                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2622         }
2623
2624         bitrates = sband->bitrates;
2625         num_rates = sband->n_bitrates;
2626         supp_rates = 0;
2627         for (i = 0; i < elems->supp_rates_len +
2628                      elems->ext_supp_rates_len; i++) {
2629                 u8 rate = 0;
2630                 int own_rate;
2631                 if (i < elems->supp_rates_len)
2632                         rate = elems->supp_rates[i];
2633                 else if (elems->ext_supp_rates)
2634                         rate = elems->ext_supp_rates
2635                                 [i - elems->supp_rates_len];
2636                 own_rate = 5 * (rate & 0x7f);
2637                 for (j = 0; j < num_rates; j++)
2638                         if (bitrates[j].bitrate == own_rate)
2639                                 supp_rates |= BIT(j);
2640         }
2641         return supp_rates;
2642 }
2643
2644
2645 static void ieee80211_rx_bss_info(struct net_device *dev,
2646                                   struct ieee80211_mgmt *mgmt,
2647                                   size_t len,
2648                                   struct ieee80211_rx_status *rx_status,
2649                                   int beacon)
2650 {
2651         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2652         struct ieee802_11_elems elems;
2653         size_t baselen;
2654         int freq, clen;
2655         struct ieee80211_sta_bss *bss;
2656         struct sta_info *sta;
2657         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2658         u64 beacon_timestamp, rx_timestamp;
2659         struct ieee80211_channel *channel;
2660         DECLARE_MAC_BUF(mac);
2661         DECLARE_MAC_BUF(mac2);
2662
2663         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2664                 return; /* ignore ProbeResp to foreign address */
2665
2666 #if 0
2667         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2668                dev->name, beacon ? "Beacon" : "Probe Response",
2669                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2670 #endif
2671
2672         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2673         if (baselen > len)
2674                 return;
2675
2676         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2677         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2678
2679         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2680             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2681                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2682                                                 rx_status->band);
2683
2684                 mesh_neighbour_update(mgmt->sa, rates, dev,
2685                                       mesh_peer_accepts_plinks(&elems, dev));
2686         }
2687
2688         rcu_read_lock();
2689
2690         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2691             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2692             (sta = sta_info_get(local, mgmt->sa))) {
2693                 u64 prev_rates;
2694                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2695                                                         rx_status->band);
2696
2697                 prev_rates = sta->supp_rates[rx_status->band];
2698                 sta->supp_rates[rx_status->band] &= supp_rates;
2699                 if (sta->supp_rates[rx_status->band] == 0) {
2700                         /* No matching rates - this should not really happen.
2701                          * Make sure that at least one rate is marked
2702                          * supported to avoid issues with TX rate ctrl. */
2703                         sta->supp_rates[rx_status->band] =
2704                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2705                 }
2706                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2707                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2708                                "%s based on beacon info (0x%llx & 0x%llx -> "
2709                                "0x%llx)\n",
2710                                dev->name, print_mac(mac, sta->addr),
2711                                (unsigned long long) prev_rates,
2712                                (unsigned long long) supp_rates,
2713                                (unsigned long long) sta->supp_rates[rx_status->band]);
2714                 }
2715         }
2716
2717         rcu_read_unlock();
2718
2719         if (elems.ds_params && elems.ds_params_len == 1)
2720                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2721         else
2722                 freq = rx_status->freq;
2723
2724         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2725
2726         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2727                 return;
2728
2729 #ifdef CONFIG_MAC80211_MESH
2730         if (elems.mesh_config)
2731                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2732                                 elems.mesh_id_len, elems.mesh_config, freq);
2733         else
2734 #endif
2735                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2736                                            elems.ssid, elems.ssid_len);
2737         if (!bss) {
2738 #ifdef CONFIG_MAC80211_MESH
2739                 if (elems.mesh_config)
2740                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2741                                 elems.mesh_id_len, elems.mesh_config,
2742                                 elems.mesh_config_len, freq);
2743                 else
2744 #endif
2745                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2746                                                    elems.ssid, elems.ssid_len);
2747                 if (!bss)
2748                         return;
2749         } else {
2750 #if 0
2751                 /* TODO: order by RSSI? */
2752                 spin_lock_bh(&local->sta_bss_lock);
2753                 list_move_tail(&bss->list, &local->sta_bss_list);
2754                 spin_unlock_bh(&local->sta_bss_lock);
2755 #endif
2756         }
2757
2758         /* save the ERP value so that it is available at association time */
2759         if (elems.erp_info && elems.erp_info_len >= 1) {
2760                 bss->erp_value = elems.erp_info[0];
2761                 bss->has_erp_value = 1;
2762         }
2763
2764         if (elems.ht_cap_elem &&
2765              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2766              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2767                 kfree(bss->ht_ie);
2768                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2769                 if (bss->ht_ie) {
2770                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2771                                 elems.ht_cap_elem_len + 2);
2772                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2773                 } else
2774                         bss->ht_ie_len = 0;
2775         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2776                 kfree(bss->ht_ie);
2777                 bss->ht_ie = NULL;
2778                 bss->ht_ie_len = 0;
2779         }
2780
2781         if (elems.ht_info_elem &&
2782              (!bss->ht_add_ie ||
2783              bss->ht_add_ie_len != elems.ht_info_elem_len ||
2784              memcmp(bss->ht_add_ie, elems.ht_info_elem,
2785                         elems.ht_info_elem_len))) {
2786                 kfree(bss->ht_add_ie);
2787                 bss->ht_add_ie =
2788                         kmalloc(elems.ht_info_elem_len + 2, GFP_ATOMIC);
2789                 if (bss->ht_add_ie) {
2790                         memcpy(bss->ht_add_ie, elems.ht_info_elem - 2,
2791                                 elems.ht_info_elem_len + 2);
2792                         bss->ht_add_ie_len = elems.ht_info_elem_len + 2;
2793                 } else
2794                         bss->ht_add_ie_len = 0;
2795         } else if (!elems.ht_info_elem && bss->ht_add_ie) {
2796                 kfree(bss->ht_add_ie);
2797                 bss->ht_add_ie = NULL;
2798                 bss->ht_add_ie_len = 0;
2799         }
2800
2801         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2802         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2803
2804         bss->supp_rates_len = 0;
2805         if (elems.supp_rates) {
2806                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2807                 if (clen > elems.supp_rates_len)
2808                         clen = elems.supp_rates_len;
2809                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2810                        clen);
2811                 bss->supp_rates_len += clen;
2812         }
2813         if (elems.ext_supp_rates) {
2814                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2815                 if (clen > elems.ext_supp_rates_len)
2816                         clen = elems.ext_supp_rates_len;
2817                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2818                        elems.ext_supp_rates, clen);
2819                 bss->supp_rates_len += clen;
2820         }
2821
2822         bss->band = rx_status->band;
2823
2824         bss->timestamp = beacon_timestamp;
2825         bss->last_update = jiffies;
2826         bss->signal = rx_status->signal;
2827         bss->noise = rx_status->noise;
2828         bss->qual = rx_status->qual;
2829         if (!beacon && !bss->probe_resp)
2830                 bss->probe_resp = true;
2831
2832         /*
2833          * In STA mode, the remaining parameters should not be overridden
2834          * by beacons because they're not necessarily accurate there.
2835          */
2836         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2837             bss->probe_resp && beacon) {
2838                 ieee80211_rx_bss_put(dev, bss);
2839                 return;
2840         }
2841
2842         if (elems.wpa &&
2843             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2844              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2845                 kfree(bss->wpa_ie);
2846                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2847                 if (bss->wpa_ie) {
2848                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2849                         bss->wpa_ie_len = elems.wpa_len + 2;
2850                 } else
2851                         bss->wpa_ie_len = 0;
2852         } else if (!elems.wpa && bss->wpa_ie) {
2853                 kfree(bss->wpa_ie);
2854                 bss->wpa_ie = NULL;
2855                 bss->wpa_ie_len = 0;
2856         }
2857
2858         if (elems.rsn &&
2859             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2860              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2861                 kfree(bss->rsn_ie);
2862                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2863                 if (bss->rsn_ie) {
2864                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2865                         bss->rsn_ie_len = elems.rsn_len + 2;
2866                 } else
2867                         bss->rsn_ie_len = 0;
2868         } else if (!elems.rsn && bss->rsn_ie) {
2869                 kfree(bss->rsn_ie);
2870                 bss->rsn_ie = NULL;
2871                 bss->rsn_ie_len = 0;
2872         }
2873
2874         /*
2875          * Cf.
2876          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2877          *
2878          * quoting:
2879          *
2880          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2881          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2882          * Alliance (September 1, 2004) is incorporated by reference herein.
2883          * The inclusion of the WMM Parameters in probe responses and
2884          * association responses is mandatory for WMM enabled networks. The
2885          * inclusion of the WMM Parameters in beacons, however, is optional.
2886          */
2887
2888         if (elems.wmm_param &&
2889             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2890              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2891                 kfree(bss->wmm_ie);
2892                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2893                 if (bss->wmm_ie) {
2894                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2895                                elems.wmm_param_len + 2);
2896                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2897                 } else
2898                         bss->wmm_ie_len = 0;
2899         } else if (elems.wmm_info &&
2900                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2901                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2902                  /* As for certain AP's Fifth bit is not set in WMM IE in
2903                   * beacon frames.So while parsing the beacon frame the
2904                   * wmm_info structure is used instead of wmm_param.
2905                   * wmm_info structure was never used to set bss->wmm_ie.
2906                   * This code fixes this problem by copying the WME
2907                   * information from wmm_info to bss->wmm_ie and enabling
2908                   * n-band association.
2909                   */
2910                 kfree(bss->wmm_ie);
2911                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2912                 if (bss->wmm_ie) {
2913                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2914                                elems.wmm_info_len + 2);
2915                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2916                 } else
2917                         bss->wmm_ie_len = 0;
2918         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2919                 kfree(bss->wmm_ie);
2920                 bss->wmm_ie = NULL;
2921                 bss->wmm_ie_len = 0;
2922         }
2923
2924         /* check if we need to merge IBSS */
2925         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2926             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2927             bss->capability & WLAN_CAPABILITY_IBSS &&
2928             bss->freq == local->oper_channel->center_freq &&
2929             elems.ssid_len == sdata->u.sta.ssid_len &&
2930             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2931                 if (rx_status->flag & RX_FLAG_TSFT) {
2932                         /* in order for correct IBSS merging we need mactime
2933                          *
2934                          * since mactime is defined as the time the first data
2935                          * symbol of the frame hits the PHY, and the timestamp
2936                          * of the beacon is defined as "the time that the data
2937                          * symbol containing the first bit of the timestamp is
2938                          * transmitted to the PHY plus the transmitting STA’s
2939                          * delays through its local PHY from the MAC-PHY
2940                          * interface to its interface with the WM"
2941                          * (802.11 11.1.2) - equals the time this bit arrives at
2942                          * the receiver - we have to take into account the
2943                          * offset between the two.
2944                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2945                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2946                          */
2947                         int rate = local->hw.wiphy->bands[rx_status->band]->
2948                                         bitrates[rx_status->rate_idx].bitrate;
2949                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2950                 } else if (local && local->ops && local->ops->get_tsf)
2951                         /* second best option: get current TSF */
2952                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2953                 else
2954                         /* can't merge without knowing the TSF */
2955                         rx_timestamp = -1LLU;
2956 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2957                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2958                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2959                        print_mac(mac, mgmt->sa),
2960                        print_mac(mac2, mgmt->bssid),
2961                        (unsigned long long)rx_timestamp,
2962                        (unsigned long long)beacon_timestamp,
2963                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2964                        jiffies);
2965 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2966                 if (beacon_timestamp > rx_timestamp) {
2967 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2968                         if (net_ratelimit())
2969 #endif
2970                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2971                                        "local TSF - IBSS merge with BSSID %s\n",
2972                                        dev->name, print_mac(mac, mgmt->bssid));
2973                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2974                         ieee80211_ibss_add_sta(dev, NULL,
2975                                                mgmt->bssid, mgmt->sa,
2976                                                BIT(rx_status->rate_idx));
2977                 }
2978         }
2979
2980         ieee80211_rx_bss_put(dev, bss);
2981 }
2982
2983
2984 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2985                                          struct ieee80211_mgmt *mgmt,
2986                                          size_t len,
2987                                          struct ieee80211_rx_status *rx_status)
2988 {
2989         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2990 }
2991
2992
2993 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2994                                      struct ieee80211_mgmt *mgmt,
2995                                      size_t len,
2996                                      struct ieee80211_rx_status *rx_status)
2997 {
2998         struct ieee80211_sub_if_data *sdata;
2999         struct ieee80211_if_sta *ifsta;
3000         size_t baselen;
3001         struct ieee802_11_elems elems;
3002         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3003         struct ieee80211_conf *conf = &local->hw.conf;
3004         u32 changed = 0;
3005
3006         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
3007
3008         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3009         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3010                 return;
3011         ifsta = &sdata->u.sta;
3012
3013         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
3014             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
3015                 return;
3016
3017         /* Process beacon from the current BSS */
3018         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3019         if (baselen > len)
3020                 return;
3021
3022         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
3023
3024         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
3025                                  elems.wmm_param_len);
3026
3027         /* Do not send changes to driver if we are scanning. This removes
3028          * requirement that driver's bss_info_changed function needs to be
3029          * atomic. */
3030         if (local->sta_sw_scanning || local->sta_hw_scanning)
3031                 return;
3032
3033         if (elems.erp_info && elems.erp_info_len >= 1)
3034                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
3035         else {
3036                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
3037                 changed |= ieee80211_handle_protect_preamb(sdata, false,
3038                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
3039         }
3040
3041         if (elems.ht_cap_elem && elems.ht_info_elem &&
3042             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
3043                 struct ieee80211_ht_bss_info bss_info;
3044
3045                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
3046                                 (struct ieee80211_ht_addt_info *)
3047                                 elems.ht_info_elem, &bss_info);
3048                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
3049                                                &bss_info);
3050         }
3051
3052         ieee80211_bss_info_change_notify(sdata, changed);
3053 }
3054
3055
3056 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
3057                                         struct ieee80211_if_sta *ifsta,
3058                                         struct ieee80211_mgmt *mgmt,
3059                                         size_t len,
3060                                         struct ieee80211_rx_status *rx_status)
3061 {
3062         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3063         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3064         int tx_last_beacon;
3065         struct sk_buff *skb;
3066         struct ieee80211_mgmt *resp;
3067         u8 *pos, *end;
3068         DECLARE_MAC_BUF(mac);
3069 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3070         DECLARE_MAC_BUF(mac2);
3071         DECLARE_MAC_BUF(mac3);
3072 #endif
3073
3074         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
3075             ifsta->state != IEEE80211_IBSS_JOINED ||
3076             len < 24 + 2 || !ifsta->probe_resp)
3077                 return;
3078
3079         if (local->ops->tx_last_beacon)
3080                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
3081         else
3082                 tx_last_beacon = 1;
3083
3084 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3085         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
3086                "%s (tx_last_beacon=%d)\n",
3087                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3088                print_mac(mac3, mgmt->bssid), tx_last_beacon);
3089 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3090
3091         if (!tx_last_beacon)
3092                 return;
3093
3094         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3095             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3096                 return;
3097
3098         end = ((u8 *) mgmt) + len;
3099         pos = mgmt->u.probe_req.variable;
3100         if (pos[0] != WLAN_EID_SSID ||
3101             pos + 2 + pos[1] > end) {
3102                 if (net_ratelimit()) {
3103                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3104                                "from %s\n",
3105                                dev->name, print_mac(mac, mgmt->sa));
3106                 }
3107                 return;
3108         }
3109         if (pos[1] != 0 &&
3110             (pos[1] != ifsta->ssid_len ||
3111              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3112                 /* Ignore ProbeReq for foreign SSID */
3113                 return;
3114         }
3115
3116         /* Reply with ProbeResp */
3117         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3118         if (!skb)
3119                 return;
3120
3121         resp = (struct ieee80211_mgmt *) skb->data;
3122         memcpy(resp->da, mgmt->sa, ETH_ALEN);
3123 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3124         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3125                dev->name, print_mac(mac, resp->da));
3126 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3127         ieee80211_sta_tx(dev, skb, 0);
3128 }
3129
3130 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3131                                      struct ieee80211_if_sta *ifsta,
3132                                      struct ieee80211_mgmt *mgmt,
3133                                      size_t len,
3134                                      struct ieee80211_rx_status *rx_status)
3135 {
3136         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3137         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3138
3139         if (len < IEEE80211_MIN_ACTION_SIZE)
3140                 return;
3141
3142         switch (mgmt->u.action.category) {
3143         case WLAN_CATEGORY_SPECTRUM_MGMT:
3144                 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3145                         break;
3146                 switch (mgmt->u.action.u.chan_switch.action_code) {
3147                 case WLAN_ACTION_SPCT_MSR_REQ:
3148                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3149                                    sizeof(mgmt->u.action.u.measurement)))
3150                                 break;
3151                         ieee80211_sta_process_measurement_req(dev, mgmt, len);
3152                         break;
3153                 }
3154                 break;
3155         case WLAN_CATEGORY_BACK:
3156                 switch (mgmt->u.action.u.addba_req.action_code) {
3157                 case WLAN_ACTION_ADDBA_REQ:
3158                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3159                                    sizeof(mgmt->u.action.u.addba_req)))
3160                                 break;
3161                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3162                         break;
3163                 case WLAN_ACTION_ADDBA_RESP:
3164                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3165                                    sizeof(mgmt->u.action.u.addba_resp)))
3166                                 break;
3167                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3168                         break;
3169                 case WLAN_ACTION_DELBA:
3170                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3171                                    sizeof(mgmt->u.action.u.delba)))
3172                                 break;
3173                         ieee80211_sta_process_delba(dev, mgmt, len);
3174                         break;
3175                 default:
3176                         if (net_ratelimit())
3177                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3178                                         dev->name);
3179                         break;
3180                 }
3181                 break;
3182         case PLINK_CATEGORY:
3183                 if (ieee80211_vif_is_mesh(&sdata->vif))
3184                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3185                 break;
3186         case MESH_PATH_SEL_CATEGORY:
3187                 if (ieee80211_vif_is_mesh(&sdata->vif))
3188                         mesh_rx_path_sel_frame(dev, mgmt, len);
3189                 break;
3190         default:
3191                 if (net_ratelimit())
3192                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
3193                         "category=%d\n", dev->name, mgmt->u.action.category);
3194                 break;
3195         }
3196 }
3197
3198 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3199                            struct ieee80211_rx_status *rx_status)
3200 {
3201         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3202         struct ieee80211_sub_if_data *sdata;
3203         struct ieee80211_if_sta *ifsta;
3204         struct ieee80211_mgmt *mgmt;
3205         u16 fc;
3206
3207         if (skb->len < 24)
3208                 goto fail;
3209
3210         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3211         ifsta = &sdata->u.sta;
3212
3213         mgmt = (struct ieee80211_mgmt *) skb->data;
3214         fc = le16_to_cpu(mgmt->frame_control);
3215
3216         switch (fc & IEEE80211_FCTL_STYPE) {
3217         case IEEE80211_STYPE_PROBE_REQ:
3218         case IEEE80211_STYPE_PROBE_RESP:
3219         case IEEE80211_STYPE_BEACON:
3220         case IEEE80211_STYPE_ACTION:
3221                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3222         case IEEE80211_STYPE_AUTH:
3223         case IEEE80211_STYPE_ASSOC_RESP:
3224         case IEEE80211_STYPE_REASSOC_RESP:
3225         case IEEE80211_STYPE_DEAUTH:
3226         case IEEE80211_STYPE_DISASSOC:
3227                 skb_queue_tail(&ifsta->skb_queue, skb);
3228                 queue_work(local->hw.workqueue, &ifsta->work);
3229                 return;
3230         default:
3231                 printk(KERN_DEBUG "%s: received unknown management frame - "
3232                        "stype=%d\n", dev->name,
3233                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3234                 break;
3235         }
3236
3237  fail:
3238         kfree_skb(skb);
3239 }
3240
3241
3242 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3243                                          struct sk_buff *skb)
3244 {
3245         struct ieee80211_rx_status *rx_status;
3246         struct ieee80211_sub_if_data *sdata;
3247         struct ieee80211_if_sta *ifsta;
3248         struct ieee80211_mgmt *mgmt;
3249         u16 fc;
3250
3251         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3252         ifsta = &sdata->u.sta;
3253
3254         rx_status = (struct ieee80211_rx_status *) skb->cb;
3255         mgmt = (struct ieee80211_mgmt *) skb->data;
3256         fc = le16_to_cpu(mgmt->frame_control);
3257
3258         switch (fc & IEEE80211_FCTL_STYPE) {
3259         case IEEE80211_STYPE_PROBE_REQ:
3260                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3261                                             rx_status);
3262                 break;
3263         case IEEE80211_STYPE_PROBE_RESP:
3264                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3265                 break;
3266         case IEEE80211_STYPE_BEACON:
3267                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3268                 break;
3269         case IEEE80211_STYPE_AUTH:
3270                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3271                 break;
3272         case IEEE80211_STYPE_ASSOC_RESP:
3273                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3274                 break;
3275         case IEEE80211_STYPE_REASSOC_RESP:
3276                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3277                 break;
3278         case IEEE80211_STYPE_DEAUTH:
3279                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3280                 break;
3281         case IEEE80211_STYPE_DISASSOC:
3282                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3283                 break;
3284         case IEEE80211_STYPE_ACTION:
3285                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3286                 break;
3287         }
3288
3289         kfree_skb(skb);
3290 }
3291
3292
3293 ieee80211_rx_result
3294 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3295                       struct ieee80211_rx_status *rx_status)
3296 {
3297         struct ieee80211_mgmt *mgmt;
3298         __le16 fc;
3299
3300         if (skb->len < 2)
3301                 return RX_DROP_UNUSABLE;
3302
3303         mgmt = (struct ieee80211_mgmt *) skb->data;
3304         fc = mgmt->frame_control;
3305
3306         if (ieee80211_is_ctl(fc))
3307                 return RX_CONTINUE;
3308
3309         if (skb->len < 24)
3310                 return RX_DROP_MONITOR;
3311
3312         if (ieee80211_is_probe_resp(fc)) {
3313                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3314                 dev_kfree_skb(skb);
3315                 return RX_QUEUED;
3316         }
3317
3318         if (ieee80211_is_beacon(fc)) {
3319                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3320                 dev_kfree_skb(skb);
3321                 return RX_QUEUED;
3322         }
3323
3324         return RX_CONTINUE;
3325 }
3326
3327
3328 static int ieee80211_sta_active_ibss(struct net_device *dev)
3329 {
3330         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3331         int active = 0;
3332         struct sta_info *sta;
3333         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3334
3335         rcu_read_lock();
3336
3337         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3338                 if (sta->sdata == sdata &&
3339                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3340                                jiffies)) {
3341                         active++;
3342                         break;
3343                 }
3344         }
3345
3346         rcu_read_unlock();
3347
3348         return active;
3349 }
3350
3351
3352 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3353 {
3354         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3355         struct sta_info *sta, *tmp;
3356         LIST_HEAD(tmp_list);
3357         DECLARE_MAC_BUF(mac);
3358         unsigned long flags;
3359
3360         spin_lock_irqsave(&local->sta_lock, flags);
3361         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3362                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3363                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3364                                dev->name, print_mac(mac, sta->addr));
3365                         __sta_info_unlink(&sta);
3366                         if (sta)
3367                                 list_add(&sta->list, &tmp_list);
3368                 }
3369         spin_unlock_irqrestore(&local->sta_lock, flags);
3370
3371         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3372                 sta_info_destroy(sta);
3373 }
3374
3375
3376 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3377                                      struct ieee80211_if_sta *ifsta)
3378 {
3379         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3380
3381         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3382         if (ieee80211_sta_active_ibss(dev))
3383                 return;
3384
3385         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3386                "IBSS networks with same SSID (merge)\n", dev->name);
3387         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3388 }
3389
3390
3391 #ifdef CONFIG_MAC80211_MESH
3392 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3393                            struct ieee80211_if_sta *ifsta)
3394 {
3395         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3396         bool free_plinks;
3397
3398         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3399         mesh_path_expire(dev);
3400
3401         free_plinks = mesh_plink_availables(sdata);
3402         if (free_plinks != sdata->u.sta.accepting_plinks)
3403                 ieee80211_if_config_beacon(dev);
3404
3405         mod_timer(&ifsta->timer, jiffies +
3406                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3407 }
3408
3409
3410 void ieee80211_start_mesh(struct net_device *dev)
3411 {
3412         struct ieee80211_if_sta *ifsta;
3413         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3414         ifsta = &sdata->u.sta;
3415         ifsta->state = IEEE80211_MESH_UP;
3416         ieee80211_sta_timer((unsigned long)sdata);
3417 }
3418 #endif
3419
3420
3421 void ieee80211_sta_timer(unsigned long data)
3422 {
3423         struct ieee80211_sub_if_data *sdata =
3424                 (struct ieee80211_sub_if_data *) data;
3425         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3426         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3427
3428         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3429         queue_work(local->hw.workqueue, &ifsta->work);
3430 }
3431
3432 void ieee80211_sta_work(struct work_struct *work)
3433 {
3434         struct ieee80211_sub_if_data *sdata =
3435                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3436         struct net_device *dev = sdata->dev;
3437         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3438         struct ieee80211_if_sta *ifsta;
3439         struct sk_buff *skb;
3440
3441         if (!netif_running(dev))
3442                 return;
3443
3444         if (local->sta_sw_scanning || local->sta_hw_scanning)
3445                 return;
3446
3447         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3448             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3449             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3450                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3451                        "(type=%d)\n", dev->name, sdata->vif.type);
3452                 return;
3453         }
3454         ifsta = &sdata->u.sta;
3455
3456         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3457                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3458
3459 #ifdef CONFIG_MAC80211_MESH
3460         if (ifsta->preq_queue_len &&
3461             time_after(jiffies,
3462                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3463                 mesh_path_start_discovery(dev);
3464 #endif
3465
3466         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3467             ifsta->state != IEEE80211_ASSOCIATE &&
3468             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3469                 if (ifsta->scan_ssid_len)
3470                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3471                 else
3472                         ieee80211_sta_start_scan(dev, NULL, 0);
3473                 return;
3474         }
3475
3476         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3477                 if (ieee80211_sta_config_auth(dev, ifsta))
3478                         return;
3479                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3480         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3481                 return;
3482
3483         switch (ifsta->state) {
3484         case IEEE80211_DISABLED:
3485                 break;
3486         case IEEE80211_AUTHENTICATE:
3487                 ieee80211_authenticate(dev, ifsta);
3488                 break;
3489         case IEEE80211_ASSOCIATE:
3490                 ieee80211_associate(dev, ifsta);
3491                 break;
3492         case IEEE80211_ASSOCIATED:
3493                 ieee80211_associated(dev, ifsta);
3494                 break;
3495         case IEEE80211_IBSS_SEARCH:
3496                 ieee80211_sta_find_ibss(dev, ifsta);
3497                 break;
3498         case IEEE80211_IBSS_JOINED:
3499                 ieee80211_sta_merge_ibss(dev, ifsta);
3500                 break;
3501 #ifdef CONFIG_MAC80211_MESH
3502         case IEEE80211_MESH_UP:
3503                 ieee80211_mesh_housekeeping(dev, ifsta);
3504                 break;
3505 #endif
3506         default:
3507                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3508                        ifsta->state);
3509                 break;
3510         }
3511
3512         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3513                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3514                        "mixed-cell disabled - disassociate\n", dev->name);
3515
3516                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3517                 ieee80211_set_disassoc(dev, ifsta, 0);
3518         }
3519 }
3520
3521
3522 static void ieee80211_sta_reset_auth(struct net_device *dev,
3523                                      struct ieee80211_if_sta *ifsta)
3524 {
3525         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3526
3527         if (local->ops->reset_tsf) {
3528                 /* Reset own TSF to allow time synchronization work. */
3529                 local->ops->reset_tsf(local_to_hw(local));
3530         }
3531
3532         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3533
3534
3535         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3536                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3537         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3538                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3539         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3540                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3541         else
3542                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3543         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3544                ifsta->auth_alg);
3545         ifsta->auth_transaction = -1;
3546         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3547         ifsta->auth_tries = ifsta->assoc_tries = 0;
3548         netif_carrier_off(dev);
3549 }
3550
3551
3552 void ieee80211_sta_req_auth(struct net_device *dev,
3553                             struct ieee80211_if_sta *ifsta)
3554 {
3555         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3556         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3557
3558         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3559                 return;
3560
3561         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3562                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3563             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3564                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3565                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3566                 queue_work(local->hw.workqueue, &ifsta->work);
3567         }
3568 }
3569
3570 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3571                                     const char *ssid, int ssid_len)
3572 {
3573         int tmp, hidden_ssid;
3574
3575         if (ssid_len == ifsta->ssid_len &&
3576             !memcmp(ifsta->ssid, ssid, ssid_len))
3577                 return 1;
3578
3579         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3580                 return 0;
3581
3582         hidden_ssid = 1;
3583         tmp = ssid_len;
3584         while (tmp--) {
3585                 if (ssid[tmp] != '\0') {
3586                         hidden_ssid = 0;
3587                         break;
3588                 }
3589         }
3590
3591         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3592                 return 1;
3593
3594         if (ssid_len == 1 && ssid[0] == ' ')
3595                 return 1;
3596
3597         return 0;
3598 }
3599
3600 static int ieee80211_sta_config_auth(struct net_device *dev,
3601                                      struct ieee80211_if_sta *ifsta)
3602 {
3603         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3604         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3605         struct ieee80211_sta_bss *bss, *selected = NULL;
3606         int top_rssi = 0, freq;
3607
3608         spin_lock_bh(&local->sta_bss_lock);
3609         freq = local->oper_channel->center_freq;
3610         list_for_each_entry(bss, &local->sta_bss_list, list) {
3611                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3612                         continue;
3613
3614                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3615                         IEEE80211_STA_AUTO_BSSID_SEL |
3616                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3617                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3618                      !!sdata->default_key))
3619                         continue;
3620
3621                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3622                     bss->freq != freq)
3623                         continue;
3624
3625                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3626                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3627                         continue;
3628
3629                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3630                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3631                         continue;
3632
3633                 if (!selected || top_rssi < bss->signal) {
3634                         selected = bss;
3635                         top_rssi = bss->signal;
3636                 }
3637         }
3638         if (selected)
3639                 atomic_inc(&selected->users);
3640         spin_unlock_bh(&local->sta_bss_lock);
3641
3642         if (selected) {
3643                 ieee80211_set_freq(dev, selected->freq);
3644                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3645                         ieee80211_sta_set_ssid(dev, selected->ssid,
3646                                                selected->ssid_len);
3647                 ieee80211_sta_set_bssid(dev, selected->bssid);
3648                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3649                 ieee80211_rx_bss_put(dev, selected);
3650                 ifsta->state = IEEE80211_AUTHENTICATE;
3651                 ieee80211_sta_reset_auth(dev, ifsta);
3652                 return 0;
3653         } else {
3654                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3655                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3656                                 ieee80211_sta_start_scan(dev, NULL, 0);
3657                         else
3658                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3659                                                          ifsta->ssid_len);
3660                         ifsta->state = IEEE80211_AUTHENTICATE;
3661                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3662                 } else
3663                         ifsta->state = IEEE80211_DISABLED;
3664         }
3665         return -1;
3666 }
3667
3668
3669 static int ieee80211_sta_create_ibss(struct net_device *dev,
3670                                      struct ieee80211_if_sta *ifsta)
3671 {
3672         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3673         struct ieee80211_sta_bss *bss;
3674         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3675         struct ieee80211_supported_band *sband;
3676         u8 bssid[ETH_ALEN], *pos;
3677         int i;
3678         int ret;
3679         DECLARE_MAC_BUF(mac);
3680
3681 #if 0
3682         /* Easier testing, use fixed BSSID. */
3683         memset(bssid, 0xfe, ETH_ALEN);
3684 #else
3685         /* Generate random, not broadcast, locally administered BSSID. Mix in
3686          * own MAC address to make sure that devices that do not have proper
3687          * random number generator get different BSSID. */
3688         get_random_bytes(bssid, ETH_ALEN);
3689         for (i = 0; i < ETH_ALEN; i++)
3690                 bssid[i] ^= dev->dev_addr[i];
3691         bssid[0] &= ~0x01;
3692         bssid[0] |= 0x02;
3693 #endif
3694
3695         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3696                dev->name, print_mac(mac, bssid));
3697
3698         bss = ieee80211_rx_bss_add(dev, bssid,
3699                                    local->hw.conf.channel->center_freq,
3700                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3701         if (!bss)
3702                 return -ENOMEM;
3703
3704         bss->band = local->hw.conf.channel->band;
3705         sband = local->hw.wiphy->bands[bss->band];
3706
3707         if (local->hw.conf.beacon_int == 0)
3708                 local->hw.conf.beacon_int = 100;
3709         bss->beacon_int = local->hw.conf.beacon_int;
3710         bss->last_update = jiffies;
3711         bss->capability = WLAN_CAPABILITY_IBSS;
3712
3713         if (sdata->default_key)
3714                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3715         else
3716                 sdata->drop_unencrypted = 0;
3717
3718         bss->supp_rates_len = sband->n_bitrates;
3719         pos = bss->supp_rates;
3720         for (i = 0; i < sband->n_bitrates; i++) {
3721                 int rate = sband->bitrates[i].bitrate;
3722                 *pos++ = (u8) (rate / 5);
3723         }
3724
3725         ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3726         ieee80211_rx_bss_put(dev, bss);
3727         return ret;
3728 }
3729
3730
3731 static int ieee80211_sta_find_ibss(struct net_device *dev,
3732                                    struct ieee80211_if_sta *ifsta)
3733 {
3734         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3735         struct ieee80211_sta_bss *bss;
3736         int found = 0;
3737         u8 bssid[ETH_ALEN];
3738         int active_ibss;
3739         DECLARE_MAC_BUF(mac);
3740         DECLARE_MAC_BUF(mac2);
3741
3742         if (ifsta->ssid_len == 0)
3743                 return -EINVAL;
3744
3745         active_ibss = ieee80211_sta_active_ibss(dev);
3746 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3747         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3748                dev->name, active_ibss);
3749 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3750         spin_lock_bh(&local->sta_bss_lock);
3751         list_for_each_entry(bss, &local->sta_bss_list, list) {
3752                 if (ifsta->ssid_len != bss->ssid_len ||
3753                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3754                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3755                         continue;
3756 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3757                 printk(KERN_DEBUG "   bssid=%s found\n",
3758                        print_mac(mac, bss->bssid));
3759 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3760                 memcpy(bssid, bss->bssid, ETH_ALEN);
3761                 found = 1;
3762                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3763                         break;
3764         }
3765         spin_unlock_bh(&local->sta_bss_lock);
3766
3767 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3768         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3769                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3770 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3771         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3772             (bss = ieee80211_rx_bss_get(dev, bssid,
3773                                         local->hw.conf.channel->center_freq,
3774                                         ifsta->ssid, ifsta->ssid_len))) {
3775                 int ret;
3776                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3777                        " based on configured SSID\n",
3778                        dev->name, print_mac(mac, bssid));
3779                 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3780                 ieee80211_rx_bss_put(dev, bss);
3781                 return ret;
3782         }
3783 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3784         printk(KERN_DEBUG "   did not try to join ibss\n");
3785 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3786
3787         /* Selected IBSS not found in current scan results - try to scan */
3788         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3789             !ieee80211_sta_active_ibss(dev)) {
3790                 mod_timer(&ifsta->timer, jiffies +
3791                                       IEEE80211_IBSS_MERGE_INTERVAL);
3792         } else if (time_after(jiffies, local->last_scan_completed +
3793                               IEEE80211_SCAN_INTERVAL)) {
3794                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3795                        "join\n", dev->name);
3796                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3797                                               ifsta->ssid_len);
3798         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3799                 int interval = IEEE80211_SCAN_INTERVAL;
3800
3801                 if (time_after(jiffies, ifsta->ibss_join_req +
3802                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3803                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3804                             (!(local->oper_channel->flags &
3805                                         IEEE80211_CHAN_NO_IBSS)))
3806                                 return ieee80211_sta_create_ibss(dev, ifsta);
3807                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3808                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3809                                        " %d MHz\n", dev->name,
3810                                        local->hw.conf.channel->center_freq);
3811                         }
3812
3813                         /* No IBSS found - decrease scan interval and continue
3814                          * scanning. */
3815                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3816                 }
3817
3818                 ifsta->state = IEEE80211_IBSS_SEARCH;
3819                 mod_timer(&ifsta->timer, jiffies + interval);
3820                 return 0;
3821         }
3822
3823         return 0;
3824 }
3825
3826
3827 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3828 {
3829         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3830         struct ieee80211_if_sta *ifsta;
3831
3832         if (len > IEEE80211_MAX_SSID_LEN)
3833                 return -EINVAL;
3834
3835         ifsta = &sdata->u.sta;
3836
3837         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3838                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3839         memcpy(ifsta->ssid, ssid, len);
3840         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3841         ifsta->ssid_len = len;
3842
3843         if (len)
3844                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3845         else
3846                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3847         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3848             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3849                 ifsta->ibss_join_req = jiffies;
3850                 ifsta->state = IEEE80211_IBSS_SEARCH;
3851                 return ieee80211_sta_find_ibss(dev, ifsta);
3852         }
3853         return 0;
3854 }
3855
3856
3857 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3858 {
3859         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3860         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3861         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3862         *len = ifsta->ssid_len;
3863         return 0;
3864 }
3865
3866
3867 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3868 {
3869         struct ieee80211_sub_if_data *sdata;
3870         struct ieee80211_if_sta *ifsta;
3871         int res;
3872
3873         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3874         ifsta = &sdata->u.sta;
3875
3876         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3877                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3878                 res = ieee80211_if_config(dev);
3879                 if (res) {
3880                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3881                                "the low-level driver\n", dev->name);
3882                         return res;
3883                 }
3884         }
3885
3886         if (is_valid_ether_addr(bssid))
3887                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3888         else
3889                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3890
3891         return 0;
3892 }
3893
3894
3895 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3896                                     struct ieee80211_sub_if_data *sdata,
3897                                     int powersave)
3898 {
3899         struct sk_buff *skb;
3900         struct ieee80211_hdr *nullfunc;
3901         __le16 fc;
3902
3903         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3904         if (!skb) {
3905                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3906                        "frame\n", sdata->dev->name);
3907                 return;
3908         }
3909         skb_reserve(skb, local->hw.extra_tx_headroom);
3910
3911         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3912         memset(nullfunc, 0, 24);
3913         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3914                          IEEE80211_FCTL_TODS);
3915         if (powersave)
3916                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3917         nullfunc->frame_control = fc;
3918         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3919         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3920         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3921
3922         ieee80211_sta_tx(sdata->dev, skb, 0);
3923 }
3924
3925
3926 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3927 {
3928         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3929             ieee80211_vif_is_mesh(&sdata->vif))
3930                 ieee80211_sta_timer((unsigned long)sdata);
3931 }
3932
3933 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3934 {
3935         struct ieee80211_local *local = hw_to_local(hw);
3936         struct net_device *dev = local->scan_dev;
3937         struct ieee80211_sub_if_data *sdata;
3938         union iwreq_data wrqu;
3939
3940         local->last_scan_completed = jiffies;
3941         memset(&wrqu, 0, sizeof(wrqu));
3942         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3943
3944         if (local->sta_hw_scanning) {
3945                 local->sta_hw_scanning = 0;
3946                 if (ieee80211_hw_config(local))
3947                         printk(KERN_DEBUG "%s: failed to restore operational "
3948                                "channel after scan\n", dev->name);
3949                 /* Restart STA timer for HW scan case */
3950                 rcu_read_lock();
3951                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3952                         ieee80211_restart_sta_timer(sdata);
3953                 rcu_read_unlock();
3954
3955                 goto done;
3956         }
3957
3958         local->sta_sw_scanning = 0;
3959         if (ieee80211_hw_config(local))
3960                 printk(KERN_DEBUG "%s: failed to restore operational "
3961                        "channel after scan\n", dev->name);
3962
3963
3964         netif_tx_lock_bh(local->mdev);
3965         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3966         local->ops->configure_filter(local_to_hw(local),
3967                                      FIF_BCN_PRBRESP_PROMISC,
3968                                      &local->filter_flags,
3969                                      local->mdev->mc_count,
3970                                      local->mdev->mc_list);
3971
3972         netif_tx_unlock_bh(local->mdev);
3973
3974         rcu_read_lock();
3975         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3976
3977                 /* No need to wake the master device. */
3978                 if (sdata->dev == local->mdev)
3979                         continue;
3980
3981                 /* Tell AP we're back */
3982                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3983                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3984                         ieee80211_send_nullfunc(local, sdata, 0);
3985
3986                 ieee80211_restart_sta_timer(sdata);
3987
3988                 netif_wake_queue(sdata->dev);
3989         }
3990         rcu_read_unlock();
3991
3992 done:
3993         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3994         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3995                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3996                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3997                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3998                     !ieee80211_sta_active_ibss(dev)))
3999                         ieee80211_sta_find_ibss(dev, ifsta);
4000         }
4001 }
4002 EXPORT_SYMBOL(ieee80211_scan_completed);
4003
4004 void ieee80211_sta_scan_work(struct work_struct *work)
4005 {
4006         struct ieee80211_local *local =
4007                 container_of(work, struct ieee80211_local, scan_work.work);
4008         struct net_device *dev = local->scan_dev;
4009         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4010         struct ieee80211_supported_band *sband;
4011         struct ieee80211_channel *chan;
4012         int skip;
4013         unsigned long next_delay = 0;
4014
4015         if (!local->sta_sw_scanning)
4016                 return;
4017
4018         switch (local->scan_state) {
4019         case SCAN_SET_CHANNEL:
4020                 /*
4021                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
4022                  * after we successfully scanned the last channel of the last
4023                  * band (and the last band is supported by the hw)
4024                  */
4025                 if (local->scan_band < IEEE80211_NUM_BANDS)
4026                         sband = local->hw.wiphy->bands[local->scan_band];
4027                 else
4028                         sband = NULL;
4029
4030                 /*
4031                  * If we are at an unsupported band and have more bands
4032                  * left to scan, advance to the next supported one.
4033                  */
4034                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
4035                         local->scan_band++;
4036                         sband = local->hw.wiphy->bands[local->scan_band];
4037                         local->scan_channel_idx = 0;
4038                 }
4039
4040                 /* if no more bands/channels left, complete scan */
4041                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
4042                         ieee80211_scan_completed(local_to_hw(local));
4043                         return;
4044                 }
4045                 skip = 0;
4046                 chan = &sband->channels[local->scan_channel_idx];
4047
4048                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
4049                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
4050                      chan->flags & IEEE80211_CHAN_NO_IBSS))
4051                         skip = 1;
4052
4053                 if (!skip) {
4054                         local->scan_channel = chan;
4055                         if (ieee80211_hw_config(local)) {
4056                                 printk(KERN_DEBUG "%s: failed to set freq to "
4057                                        "%d MHz for scan\n", dev->name,
4058                                        chan->center_freq);
4059                                 skip = 1;
4060                         }
4061                 }
4062
4063                 /* advance state machine to next channel/band */
4064                 local->scan_channel_idx++;
4065                 if (local->scan_channel_idx >= sband->n_channels) {
4066                         /*
4067                          * scan_band may end up == IEEE80211_NUM_BANDS, but
4068                          * we'll catch that case above and complete the scan
4069                          * if that is the case.
4070                          */
4071                         local->scan_band++;
4072                         local->scan_channel_idx = 0;
4073                 }
4074
4075                 if (skip)
4076                         break;
4077
4078                 next_delay = IEEE80211_PROBE_DELAY +
4079                              usecs_to_jiffies(local->hw.channel_change_time);
4080                 local->scan_state = SCAN_SEND_PROBE;
4081                 break;
4082         case SCAN_SEND_PROBE:
4083                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
4084                 local->scan_state = SCAN_SET_CHANNEL;
4085
4086                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
4087                         break;
4088                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
4089                                          local->scan_ssid_len);
4090                 next_delay = IEEE80211_CHANNEL_TIME;
4091                 break;
4092         }
4093
4094         if (local->sta_sw_scanning)
4095                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4096                                    next_delay);
4097 }
4098
4099
4100 static int ieee80211_sta_start_scan(struct net_device *dev,
4101                                     u8 *ssid, size_t ssid_len)
4102 {
4103         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4104         struct ieee80211_sub_if_data *sdata;
4105
4106         if (ssid_len > IEEE80211_MAX_SSID_LEN)
4107                 return -EINVAL;
4108
4109         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
4110          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4111          * BSSID: MACAddress
4112          * SSID
4113          * ScanType: ACTIVE, PASSIVE
4114          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4115          *    a Probe frame during active scanning
4116          * ChannelList
4117          * MinChannelTime (>= ProbeDelay), in TU
4118          * MaxChannelTime: (>= MinChannelTime), in TU
4119          */
4120
4121          /* MLME-SCAN.confirm
4122           * BSSDescriptionSet
4123           * ResultCode: SUCCESS, INVALID_PARAMETERS
4124          */
4125
4126         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4127                 if (local->scan_dev == dev)
4128                         return 0;
4129                 return -EBUSY;
4130         }
4131
4132         if (local->ops->hw_scan) {
4133                 int rc = local->ops->hw_scan(local_to_hw(local),
4134                                              ssid, ssid_len);
4135                 if (!rc) {
4136                         local->sta_hw_scanning = 1;
4137                         local->scan_dev = dev;
4138                 }
4139                 return rc;
4140         }
4141
4142         local->sta_sw_scanning = 1;
4143
4144         rcu_read_lock();
4145         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4146
4147                 /* Don't stop the master interface, otherwise we can't transmit
4148                  * probes! */
4149                 if (sdata->dev == local->mdev)
4150                         continue;
4151
4152                 netif_stop_queue(sdata->dev);
4153                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4154                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4155                         ieee80211_send_nullfunc(local, sdata, 1);
4156         }
4157         rcu_read_unlock();
4158
4159         if (ssid) {
4160                 local->scan_ssid_len = ssid_len;
4161                 memcpy(local->scan_ssid, ssid, ssid_len);
4162         } else
4163                 local->scan_ssid_len = 0;
4164         local->scan_state = SCAN_SET_CHANNEL;
4165         local->scan_channel_idx = 0;
4166         local->scan_band = IEEE80211_BAND_2GHZ;
4167         local->scan_dev = dev;
4168
4169         netif_tx_lock_bh(local->mdev);
4170         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4171         local->ops->configure_filter(local_to_hw(local),
4172                                      FIF_BCN_PRBRESP_PROMISC,
4173                                      &local->filter_flags,
4174                                      local->mdev->mc_count,
4175                                      local->mdev->mc_list);
4176         netif_tx_unlock_bh(local->mdev);
4177
4178         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4179         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4180                            IEEE80211_CHANNEL_TIME);
4181
4182         return 0;
4183 }
4184
4185
4186 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4187 {
4188         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4189         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4190         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4191
4192         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4193                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4194
4195         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4196                 if (local->scan_dev == dev)
4197                         return 0;
4198                 return -EBUSY;
4199         }
4200
4201         ifsta->scan_ssid_len = ssid_len;
4202         if (ssid_len)
4203                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4204         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4205         queue_work(local->hw.workqueue, &ifsta->work);
4206         return 0;
4207 }
4208
4209 static char *
4210 ieee80211_sta_scan_result(struct net_device *dev,
4211                           struct iw_request_info *info,
4212                           struct ieee80211_sta_bss *bss,
4213                           char *current_ev, char *end_buf)
4214 {
4215         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4216         struct iw_event iwe;
4217
4218         if (time_after(jiffies,
4219                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4220                 return current_ev;
4221
4222         memset(&iwe, 0, sizeof(iwe));
4223         iwe.cmd = SIOCGIWAP;
4224         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4225         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4226         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4227                                           IW_EV_ADDR_LEN);
4228
4229         memset(&iwe, 0, sizeof(iwe));
4230         iwe.cmd = SIOCGIWESSID;
4231         if (bss_mesh_cfg(bss)) {
4232                 iwe.u.data.length = bss_mesh_id_len(bss);
4233                 iwe.u.data.flags = 1;
4234                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4235                                                   &iwe, bss_mesh_id(bss));
4236         } else {
4237                 iwe.u.data.length = bss->ssid_len;
4238                 iwe.u.data.flags = 1;
4239                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4240                                                   &iwe, bss->ssid);
4241         }
4242
4243         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4244             || bss_mesh_cfg(bss)) {
4245                 memset(&iwe, 0, sizeof(iwe));
4246                 iwe.cmd = SIOCGIWMODE;
4247                 if (bss_mesh_cfg(bss))
4248                         iwe.u.mode = IW_MODE_MESH;
4249                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4250                         iwe.u.mode = IW_MODE_MASTER;
4251                 else
4252                         iwe.u.mode = IW_MODE_ADHOC;
4253                 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4254                                                   &iwe, IW_EV_UINT_LEN);
4255         }
4256
4257         memset(&iwe, 0, sizeof(iwe));
4258         iwe.cmd = SIOCGIWFREQ;
4259         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4260         iwe.u.freq.e = 0;
4261         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4262                                           IW_EV_FREQ_LEN);
4263
4264         memset(&iwe, 0, sizeof(iwe));
4265         iwe.cmd = SIOCGIWFREQ;
4266         iwe.u.freq.m = bss->freq;
4267         iwe.u.freq.e = 6;
4268         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4269                                           IW_EV_FREQ_LEN);
4270         memset(&iwe, 0, sizeof(iwe));
4271         iwe.cmd = IWEVQUAL;
4272         iwe.u.qual.qual = bss->qual;
4273         iwe.u.qual.level = bss->signal;
4274         iwe.u.qual.noise = bss->noise;
4275         iwe.u.qual.updated = local->wstats_flags;
4276         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4277                                           IW_EV_QUAL_LEN);
4278
4279         memset(&iwe, 0, sizeof(iwe));
4280         iwe.cmd = SIOCGIWENCODE;
4281         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4282                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4283         else
4284                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4285         iwe.u.data.length = 0;
4286         current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4287                                           &iwe, "");
4288
4289         if (bss && bss->wpa_ie) {
4290                 memset(&iwe, 0, sizeof(iwe));
4291                 iwe.cmd = IWEVGENIE;
4292                 iwe.u.data.length = bss->wpa_ie_len;
4293                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4294                                                   &iwe, bss->wpa_ie);
4295         }
4296
4297         if (bss && bss->rsn_ie) {
4298                 memset(&iwe, 0, sizeof(iwe));
4299                 iwe.cmd = IWEVGENIE;
4300                 iwe.u.data.length = bss->rsn_ie_len;
4301                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4302                                                   &iwe, bss->rsn_ie);
4303         }
4304
4305         if (bss && bss->ht_ie) {
4306                 memset(&iwe, 0, sizeof(iwe));
4307                 iwe.cmd = IWEVGENIE;
4308                 iwe.u.data.length = bss->ht_ie_len;
4309                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4310                                                   &iwe, bss->ht_ie);
4311         }
4312
4313         if (bss && bss->supp_rates_len > 0) {
4314                 /* display all supported rates in readable format */
4315                 char *p = current_ev + iwe_stream_lcp_len(info);
4316                 int i;
4317
4318                 memset(&iwe, 0, sizeof(iwe));
4319                 iwe.cmd = SIOCGIWRATE;
4320                 /* Those two flags are ignored... */
4321                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4322
4323                 for (i = 0; i < bss->supp_rates_len; i++) {
4324                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4325                                                         0x7f) * 500000);
4326                         p = iwe_stream_add_value(info, current_ev, p,
4327                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4328                 }
4329                 current_ev = p;
4330         }
4331
4332         if (bss) {
4333                 char *buf;
4334                 buf = kmalloc(30, GFP_ATOMIC);
4335                 if (buf) {
4336                         memset(&iwe, 0, sizeof(iwe));
4337                         iwe.cmd = IWEVCUSTOM;
4338                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4339                         iwe.u.data.length = strlen(buf);
4340                         current_ev = iwe_stream_add_point(info, current_ev,
4341                                                           end_buf,
4342                                                           &iwe, buf);
4343                         memset(&iwe, 0, sizeof(iwe));
4344                         iwe.cmd = IWEVCUSTOM;
4345                         sprintf(buf, " Last beacon: %dms ago",
4346                                 jiffies_to_msecs(jiffies - bss->last_update));
4347                         iwe.u.data.length = strlen(buf);
4348                         current_ev = iwe_stream_add_point(info, current_ev,
4349                                                           end_buf, &iwe, buf);
4350                         kfree(buf);
4351                 }
4352         }
4353
4354         if (bss_mesh_cfg(bss)) {
4355                 char *buf;
4356                 u8 *cfg = bss_mesh_cfg(bss);
4357                 buf = kmalloc(50, GFP_ATOMIC);
4358                 if (buf) {
4359                         memset(&iwe, 0, sizeof(iwe));
4360                         iwe.cmd = IWEVCUSTOM;
4361                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4362                         iwe.u.data.length = strlen(buf);
4363                         current_ev = iwe_stream_add_point(info, current_ev,
4364                                                           end_buf,
4365                                                           &iwe, buf);
4366                         sprintf(buf, "Path Selection Protocol ID: "
4367                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4368                                                         cfg[4]);
4369                         iwe.u.data.length = strlen(buf);
4370                         current_ev = iwe_stream_add_point(info, current_ev,
4371                                                           end_buf,
4372                                                           &iwe, buf);
4373                         sprintf(buf, "Path Selection Metric ID: "
4374                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4375                                                         cfg[8]);
4376                         iwe.u.data.length = strlen(buf);
4377                         current_ev = iwe_stream_add_point(info, current_ev,
4378                                                           end_buf,
4379                                                           &iwe, buf);
4380                         sprintf(buf, "Congestion Control Mode ID: "
4381                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4382                                                         cfg[11], cfg[12]);
4383                         iwe.u.data.length = strlen(buf);
4384                         current_ev = iwe_stream_add_point(info, current_ev,
4385                                                           end_buf,
4386                                                           &iwe, buf);
4387                         sprintf(buf, "Channel Precedence: "
4388                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4389                                                         cfg[15], cfg[16]);
4390                         iwe.u.data.length = strlen(buf);
4391                         current_ev = iwe_stream_add_point(info, current_ev,
4392                                                           end_buf,
4393                                                           &iwe, buf);
4394                         kfree(buf);
4395                 }
4396         }
4397
4398         return current_ev;
4399 }
4400
4401
4402 int ieee80211_sta_scan_results(struct net_device *dev,
4403                                struct iw_request_info *info,
4404                                char *buf, size_t len)
4405 {
4406         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4407         char *current_ev = buf;
4408         char *end_buf = buf + len;
4409         struct ieee80211_sta_bss *bss;
4410
4411         spin_lock_bh(&local->sta_bss_lock);
4412         list_for_each_entry(bss, &local->sta_bss_list, list) {
4413                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4414                         spin_unlock_bh(&local->sta_bss_lock);
4415                         return -E2BIG;
4416                 }
4417                 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4418                                                        current_ev, end_buf);
4419         }
4420         spin_unlock_bh(&local->sta_bss_lock);
4421         return current_ev - buf;
4422 }
4423
4424
4425 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4426 {
4427         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4428         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4429
4430         kfree(ifsta->extra_ie);
4431         if (len == 0) {
4432                 ifsta->extra_ie = NULL;
4433                 ifsta->extra_ie_len = 0;
4434                 return 0;
4435         }
4436         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4437         if (!ifsta->extra_ie) {
4438                 ifsta->extra_ie_len = 0;
4439                 return -ENOMEM;
4440         }
4441         memcpy(ifsta->extra_ie, ie, len);
4442         ifsta->extra_ie_len = len;
4443         return 0;
4444 }
4445
4446
4447 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4448                                         struct sk_buff *skb, u8 *bssid,
4449                                         u8 *addr, u64 supp_rates)
4450 {
4451         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4452         struct sta_info *sta;
4453         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4454         DECLARE_MAC_BUF(mac);
4455         int band = local->hw.conf.channel->band;
4456
4457         /* TODO: Could consider removing the least recently used entry and
4458          * allow new one to be added. */
4459         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4460                 if (net_ratelimit()) {
4461                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4462                                "entry %s\n", dev->name, print_mac(mac, addr));
4463                 }
4464                 return NULL;
4465         }
4466
4467         if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4468                 return NULL;
4469
4470         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4471                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4472
4473         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4474         if (!sta)
4475                 return NULL;
4476
4477         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4478
4479         if (supp_rates)
4480                 sta->supp_rates[band] = supp_rates;
4481         else
4482                 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4483
4484         rate_control_rate_init(sta, local);
4485
4486         if (sta_info_insert(sta))
4487                 return NULL;
4488
4489         return sta;
4490 }
4491
4492
4493 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4494 {
4495         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4496         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4497
4498         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4499                dev->name, reason);
4500
4501         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4502             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4503                 return -EINVAL;
4504
4505         ieee80211_send_deauth(dev, ifsta, reason);
4506         ieee80211_set_disassoc(dev, ifsta, 1);
4507         return 0;
4508 }
4509
4510
4511 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4512 {
4513         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4514         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4515
4516         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4517                dev->name, reason);
4518
4519         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4520                 return -EINVAL;
4521
4522         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4523                 return -1;
4524
4525         ieee80211_send_disassoc(dev, ifsta, reason);
4526         ieee80211_set_disassoc(dev, ifsta, 0);
4527         return 0;
4528 }
4529
4530 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4531                           enum ieee80211_notification_types  notif_type)
4532 {
4533         struct ieee80211_local *local = hw_to_local(hw);
4534         struct ieee80211_sub_if_data *sdata;
4535
4536         switch (notif_type) {
4537         case IEEE80211_NOTIFY_RE_ASSOC:
4538                 rcu_read_lock();
4539                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4540
4541                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4542                                 ieee80211_sta_req_auth(sdata->dev,
4543                                                        &sdata->u.sta);
4544                         }
4545
4546                 }
4547                 rcu_read_unlock();
4548                 break;
4549         }
4550 }
4551 EXPORT_SYMBOL(ieee80211_notify_mac);