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

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "rate.h"
  34 #include "led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_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 (20 * 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                 default:
 208                         break;
 209                 }
 210
 211                 left -= elen;
 212                 pos += elen;
 213         }
 214 }
 215
 216
 217 static int ecw2cw(int ecw)
 218 {
 219         return (1 << ecw) - 1;
 220 }
 221
 222
 223 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 224                                          struct ieee80211_sta_bss *bss,
 225                                          int ibss)
 226 {
 227         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 228         struct ieee80211_local *local = sdata->local;
 229         int i, have_higher_than_11mbit = 0;
 230
 231
 232         /* cf. IEEE 802.11 9.2.12 */
 233         for (i = 0; i < bss->supp_rates_len; i++)
 234                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 235                         have_higher_than_11mbit = 1;
 236
 237         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 238             have_higher_than_11mbit)
 239                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 240         else
 241                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 242
 243
 244         if (local->ops->conf_tx) {
 245                 struct ieee80211_tx_queue_params qparam;
 246
 247                 memset(&qparam, 0, sizeof(qparam));
 248
 249                 qparam.aifs = 2;
 250
 251                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 252                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 253                         qparam.cw_min = 31;
 254                 else
 255                         qparam.cw_min = 15;
 256
 257                 qparam.cw_max = 1023;
 258                 qparam.txop = 0;
 259
 260                 for (i = 0; i < local_to_hw(local)->queues; i++)
 261                         local->ops->conf_tx(local_to_hw(local), i, &qparam);
 262         }
 263 }
 264
 265 static void ieee80211_sta_wmm_params(struct net_device *dev,
 266                                      struct ieee80211_if_sta *ifsta,
 267                                      u8 *wmm_param, size_t wmm_param_len)
 268 {
 269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 270         struct ieee80211_tx_queue_params params;
 271         size_t left;
 272         int count;
 273         u8 *pos;
 274
 275         if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
 276                 return;
 277
 278         if (!wmm_param)
 279                 return;
 280
 281         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 282                 return;
 283         count = wmm_param[6] & 0x0f;
 284         if (count == ifsta->wmm_last_param_set)
 285                 return;
 286         ifsta->wmm_last_param_set = count;
 287
 288         pos = wmm_param + 8;
 289         left = wmm_param_len - 8;
 290
 291         memset(&params, 0, sizeof(params));
 292
 293         if (!local->ops->conf_tx)
 294                 return;
 295
 296         local->wmm_acm = 0;
 297         for (; left >= 4; left -= 4, pos += 4) {
 298                 int aci = (pos[0] >> 5) & 0x03;
 299                 int acm = (pos[0] >> 4) & 0x01;
 300                 int queue;
 301
 302                 switch (aci) {
 303                 case 1:
 304                         queue = 3;
 305                         if (acm)
 306                                 local->wmm_acm |= BIT(0) | BIT(3);
 307                         break;
 308                 case 2:
 309                         queue = 1;
 310                         if (acm)
 311                                 local->wmm_acm |= BIT(4) | BIT(5);
 312                         break;
 313                 case 3:
 314                         queue = 0;
 315                         if (acm)
 316                                 local->wmm_acm |= BIT(6) | BIT(7);
 317                         break;
 318                 case 0:
 319                 default:
 320                         queue = 2;
 321                         if (acm)
 322                                 local->wmm_acm |= BIT(1) | BIT(2);
 323                         break;
 324                 }
 325
 326                 params.aifs = pos[0] & 0x0f;
 327                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 328                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 329                 params.txop = pos[2] | (pos[3] << 8);
 330 #ifdef CONFIG_MAC80211_DEBUG
 331                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 332                        "cWmin=%d cWmax=%d txop=%d\n",
 333                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 334                        params.cw_max, params.txop);
 335 #endif
 336                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 337                  * AC for now) */
 338                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 339                         printk(KERN_DEBUG "%s: failed to set TX queue "
 340                                "parameters for queue %d\n", dev->name, queue);
 341                 }
 342         }
 343 }
 344
 345 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 346                                            bool use_protection,
 347                                            bool use_short_preamble)
 348 {
 349         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 350         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 351         DECLARE_MAC_BUF(mac);
 352         u32 changed = 0;
 353
 354         if (use_protection != bss_conf->use_cts_prot) {
 355                 if (net_ratelimit()) {
 356                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 357                                "%s)\n",
 358                                sdata->dev->name,
 359                                use_protection ? "enabled" : "disabled",
 360                                print_mac(mac, ifsta->bssid));
 361                 }
 362                 bss_conf->use_cts_prot = use_protection;
 363                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 364         }
 365
 366         if (use_short_preamble != bss_conf->use_short_preamble) {
 367                 if (net_ratelimit()) {
 368                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 369                                " (BSSID=%s)\n",
 370                                sdata->dev->name,
 371                                use_short_preamble ? "short" : "long",
 372                                print_mac(mac, ifsta->bssid));
 373                 }
 374                 bss_conf->use_short_preamble = use_short_preamble;
 375                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 376         }
 377
 378         return changed;
 379 }
 380
 381 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 382                                    u8 erp_value)
 383 {
 384         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 385         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 386
 387         return ieee80211_handle_protect_preamb(sdata,
 388                         use_protection, use_short_preamble);
 389 }
 390
 391 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 392                                            struct ieee80211_sta_bss *bss)
 393 {
 394         u32 changed = 0;
 395
 396         if (bss->has_erp_value)
 397                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 398         else {
 399                 u16 capab = bss->capability;
 400                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 401                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 402         }
 403
 404         return changed;
 405 }
 406
 407 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 408                                    struct ieee80211_ht_info *ht_info)
 409 {
 410
 411         if (ht_info == NULL)
 412                 return -EINVAL;
 413
 414         memset(ht_info, 0, sizeof(*ht_info));
 415
 416         if (ht_cap_ie) {
 417                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 418
 419                 ht_info->ht_supported = 1;
 420                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 421                 ht_info->ampdu_factor =
 422                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 423                 ht_info->ampdu_density =
 424                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 425                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 426         } else
 427                 ht_info->ht_supported = 0;
 428
 429         return 0;
 430 }
 431
 432 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 433                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 434                         struct ieee80211_ht_bss_info *bss_info)
 435 {
 436         if (bss_info == NULL)
 437                 return -EINVAL;
 438
 439         memset(bss_info, 0, sizeof(*bss_info));
 440
 441         if (ht_add_info_ie) {
 442                 u16 op_mode;
 443                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 444
 445                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 446                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 447                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 448         }
 449
 450         return 0;
 451 }
 452
 453 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 454                                          struct ieee80211_if_sta *ifsta)
 455 {
 456         char *buf;
 457         size_t len;
 458         int i;
 459         union iwreq_data wrqu;
 460
 461         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 462                 return;
 463
 464         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 465                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 466         if (!buf)
 467                 return;
 468
 469         len = sprintf(buf, "ASSOCINFO(");
 470         if (ifsta->assocreq_ies) {
 471                 len += sprintf(buf + len, "ReqIEs=");
 472                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 473                         len += sprintf(buf + len, "%02x",
 474                                        ifsta->assocreq_ies[i]);
 475                 }
 476         }
 477         if (ifsta->assocresp_ies) {
 478                 if (ifsta->assocreq_ies)
 479                         len += sprintf(buf + len, " ");
 480                 len += sprintf(buf + len, "RespIEs=");
 481                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 482                         len += sprintf(buf + len, "%02x",
 483                                        ifsta->assocresp_ies[i]);
 484                 }
 485         }
 486         len += sprintf(buf + len, ")");
 487
 488         if (len > IW_CUSTOM_MAX) {
 489                 len = sprintf(buf, "ASSOCRESPIE=");
 490                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 491                         len += sprintf(buf + len, "%02x",
 492                                        ifsta->assocresp_ies[i]);
 493                 }
 494         }
 495
 496         memset(&wrqu, 0, sizeof(wrqu));
 497         wrqu.data.length = len;
 498         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 499
 500         kfree(buf);
 501 }
 502
 503
 504 static void ieee80211_set_associated(struct net_device *dev,
 505                                      struct ieee80211_if_sta *ifsta,
 506                                      bool assoc)
 507 {
 508         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 509         struct ieee80211_local *local = sdata->local;
 510         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 511         union iwreq_data wrqu;
 512         u32 changed = BSS_CHANGED_ASSOC;
 513
 514         if (assoc) {
 515                 struct ieee80211_sta_bss *bss;
 516
 517                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 518
 519                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 520                         return;
 521
 522                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 523                                            conf->channel->center_freq,
 524                                            ifsta->ssid, ifsta->ssid_len);
 525                 if (bss) {
 526                         /* set timing information */
 527                         sdata->bss_conf.beacon_int = bss->beacon_int;
 528                         sdata->bss_conf.timestamp = bss->timestamp;
 529
 530                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 531
 532                         ieee80211_rx_bss_put(dev, bss);
 533                 }
 534
 535                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 536                         changed |= BSS_CHANGED_HT;
 537                         sdata->bss_conf.assoc_ht = 1;
 538                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 539                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 540                 }
 541
 542                 netif_carrier_on(dev);
 543                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 544                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 545                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 546                 ieee80211_sta_send_associnfo(dev, ifsta);
 547         } else {
 548                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 549                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 550                 netif_carrier_off(dev);
 551                 ieee80211_reset_erp_info(dev);
 552
 553                 sdata->bss_conf.assoc_ht = 0;
 554                 sdata->bss_conf.ht_conf = NULL;
 555                 sdata->bss_conf.ht_bss_conf = NULL;
 556
 557                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 558         }
 559         ifsta->last_probe = jiffies;
 560         ieee80211_led_assoc(local, assoc);
 561
 562         sdata->bss_conf.assoc = assoc;
 563         ieee80211_bss_info_change_notify(sdata, changed);
 564         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 565         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 566 }
 567
 568 static void ieee80211_set_disassoc(struct net_device *dev,
 569                                    struct ieee80211_if_sta *ifsta, int deauth)
 570 {
 571         if (deauth)
 572                 ifsta->auth_tries = 0;
 573         ifsta->assoc_tries = 0;
 574         ieee80211_set_associated(dev, ifsta, 0);
 575 }
 576
 577 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 578                       int encrypt)
 579 {
 580         struct ieee80211_sub_if_data *sdata;
 581         struct ieee80211_tx_packet_data *pkt_data;
 582
 583         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 584         skb->dev = sdata->local->mdev;
 585         skb_set_mac_header(skb, 0);
 586         skb_set_network_header(skb, 0);
 587         skb_set_transport_header(skb, 0);
 588
 589         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 590         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 591         pkt_data->ifindex = sdata->dev->ifindex;
 592         if (!encrypt)
 593                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 594
 595         dev_queue_xmit(skb);
 596 }
 597
 598
 599 static void ieee80211_send_auth(struct net_device *dev,
 600                                 struct ieee80211_if_sta *ifsta,
 601                                 int transaction, u8 *extra, size_t extra_len,
 602                                 int encrypt)
 603 {
 604         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 605         struct sk_buff *skb;
 606         struct ieee80211_mgmt *mgmt;
 607
 608         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 609                             sizeof(*mgmt) + 6 + extra_len);
 610         if (!skb) {
 611                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 612                        "frame\n", dev->name);
 613                 return;
 614         }
 615         skb_reserve(skb, local->hw.extra_tx_headroom);
 616
 617         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 618         memset(mgmt, 0, 24 + 6);
 619         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 620                                            IEEE80211_STYPE_AUTH);
 621         if (encrypt)
 622                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 623         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 624         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 625         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 626         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 627         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 628         ifsta->auth_transaction = transaction + 1;
 629         mgmt->u.auth.status_code = cpu_to_le16(0);
 630         if (extra)
 631                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 632
 633         ieee80211_sta_tx(dev, skb, encrypt);
 634 }
 635
 636
 637 static void ieee80211_authenticate(struct net_device *dev,
 638                                    struct ieee80211_if_sta *ifsta)
 639 {
 640         DECLARE_MAC_BUF(mac);
 641
 642         ifsta->auth_tries++;
 643         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 644                 printk(KERN_DEBUG "%s: authentication with AP %s"
 645                        " timed out\n",
 646                        dev->name, print_mac(mac, ifsta->bssid));
 647                 ifsta->state = IEEE80211_DISABLED;
 648                 return;
 649         }
 650
 651         ifsta->state = IEEE80211_AUTHENTICATE;
 652         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 653                dev->name, print_mac(mac, ifsta->bssid));
 654
 655         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 656
 657         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 658 }
 659
 660 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 661                                       struct ieee80211_supported_band *sband,
 662                                       u64 *rates)
 663 {
 664         int i, j, count;
 665         *rates = 0;
 666         count = 0;
 667         for (i = 0; i < bss->supp_rates_len; i++) {
 668                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 669
 670                 for (j = 0; j < sband->n_bitrates; j++)
 671                         if (sband->bitrates[j].bitrate == rate) {
 672                                 *rates |= BIT(j);
 673                                 count++;
 674                                 break;
 675                         }
 676         }
 677
 678         return count;
 679 }
 680
 681 static void ieee80211_send_assoc(struct net_device *dev,
 682                                  struct ieee80211_if_sta *ifsta)
 683 {
 684         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 685         struct sk_buff *skb;
 686         struct ieee80211_mgmt *mgmt;
 687         u8 *pos, *ies;
 688         int i, len, count, rates_len, supp_rates_len;
 689         u16 capab;
 690         struct ieee80211_sta_bss *bss;
 691         int wmm = 0;
 692         struct ieee80211_supported_band *sband;
 693         u64 rates = 0;
 694
 695         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 696                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 697                             ifsta->ssid_len);
 698         if (!skb) {
 699                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 700                        "frame\n", dev->name);
 701                 return;
 702         }
 703         skb_reserve(skb, local->hw.extra_tx_headroom);
 704
 705         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 706
 707         capab = ifsta->capab;
 708
 709         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 710                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 711                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 712                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 713                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 714         }
 715
 716         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 717                                    local->hw.conf.channel->center_freq,
 718                                    ifsta->ssid, ifsta->ssid_len);
 719         if (bss) {
 720                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 721                         capab |= WLAN_CAPABILITY_PRIVACY;
 722                 if (bss->wmm_ie)
 723                         wmm = 1;
 724
 725                 /* get all rates supported by the device and the AP as
 726                  * some APs don't like getting a superset of their rates
 727                  * in the association request (e.g. D-Link DAP 1353 in
 728                  * b-only mode) */
 729                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 730
 731                 ieee80211_rx_bss_put(dev, bss);
 732         } else {
 733                 rates = ~0;
 734                 rates_len = sband->n_bitrates;
 735         }
 736
 737         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 738         memset(mgmt, 0, 24);
 739         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 740         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 741         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 742
 743         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 744                 skb_put(skb, 10);
 745                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 746                                                    IEEE80211_STYPE_REASSOC_REQ);
 747                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 748                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 749                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 750                        ETH_ALEN);
 751         } else {
 752                 skb_put(skb, 4);
 753                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 754                                                    IEEE80211_STYPE_ASSOC_REQ);
 755                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 756                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 757         }
 758
 759         /* SSID */
 760         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 761         *pos++ = WLAN_EID_SSID;
 762         *pos++ = ifsta->ssid_len;
 763         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 764
 765         /* add all rates which were marked to be used above */
 766         supp_rates_len = rates_len;
 767         if (supp_rates_len > 8)
 768                 supp_rates_len = 8;
 769
 770         len = sband->n_bitrates;
 771         pos = skb_put(skb, supp_rates_len + 2);
 772         *pos++ = WLAN_EID_SUPP_RATES;
 773         *pos++ = supp_rates_len;
 774
 775         count = 0;
 776         for (i = 0; i < sband->n_bitrates; i++) {
 777                 if (BIT(i) & rates) {
 778                         int rate = sband->bitrates[i].bitrate;
 779                         *pos++ = (u8) (rate / 5);
 780                         if (++count == 8)
 781                                 break;
 782                 }
 783         }
 784
 785         if (count == 8) {
 786                 pos = skb_put(skb, rates_len - count + 2);
 787                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 788                 *pos++ = rates_len - count;
 789
 790                 for (i++; i < sband->n_bitrates; i++) {
 791                         if (BIT(i) & rates) {
 792                                 int rate = sband->bitrates[i].bitrate;
 793                                 *pos++ = (u8) (rate / 5);
 794                         }
 795                 }
 796         }
 797
 798         if (ifsta->extra_ie) {
 799                 pos = skb_put(skb, ifsta->extra_ie_len);
 800                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 801         }
 802
 803         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 804                 pos = skb_put(skb, 9);
 805                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 806                 *pos++ = 7; /* len */
 807                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 808                 *pos++ = 0x50;
 809                 *pos++ = 0xf2;
 810                 *pos++ = 2; /* WME */
 811                 *pos++ = 0; /* WME info */
 812                 *pos++ = 1; /* WME ver */
 813                 *pos++ = 0;
 814         }
 815
 816         /* wmm support is a must to HT */
 817         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 818             sband->ht_info.ht_supported) {
 819                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 820                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 821                 *pos++ = WLAN_EID_HT_CAPABILITY;
 822                 *pos++ = sizeof(struct ieee80211_ht_cap);
 823                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 824                 memcpy(pos, &tmp, sizeof(u16));
 825                 pos += sizeof(u16);
 826                 /* TODO: needs a define here for << 2 */
 827                 *pos++ = sband->ht_info.ampdu_factor |
 828                          (sband->ht_info.ampdu_density << 2);
 829                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 830         }
 831
 832         kfree(ifsta->assocreq_ies);
 833         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 834         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 835         if (ifsta->assocreq_ies)
 836                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 837
 838         ieee80211_sta_tx(dev, skb, 0);
 839 }
 840
 841
 842 static void ieee80211_send_deauth(struct net_device *dev,
 843                                   struct ieee80211_if_sta *ifsta, u16 reason)
 844 {
 845         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 846         struct sk_buff *skb;
 847         struct ieee80211_mgmt *mgmt;
 848
 849         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 850         if (!skb) {
 851                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 852                        "frame\n", dev->name);
 853                 return;
 854         }
 855         skb_reserve(skb, local->hw.extra_tx_headroom);
 856
 857         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 858         memset(mgmt, 0, 24);
 859         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 860         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 861         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 862         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 863                                            IEEE80211_STYPE_DEAUTH);
 864         skb_put(skb, 2);
 865         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 866
 867         ieee80211_sta_tx(dev, skb, 0);
 868 }
 869
 870
 871 static void ieee80211_send_disassoc(struct net_device *dev,
 872                                     struct ieee80211_if_sta *ifsta, u16 reason)
 873 {
 874         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 875         struct sk_buff *skb;
 876         struct ieee80211_mgmt *mgmt;
 877
 878         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 879         if (!skb) {
 880                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 881                        "frame\n", dev->name);
 882                 return;
 883         }
 884         skb_reserve(skb, local->hw.extra_tx_headroom);
 885
 886         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 887         memset(mgmt, 0, 24);
 888         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 889         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 890         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 891         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 892                                            IEEE80211_STYPE_DISASSOC);
 893         skb_put(skb, 2);
 894         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 895
 896         ieee80211_sta_tx(dev, skb, 0);
 897 }
 898
 899
 900 static int ieee80211_privacy_mismatch(struct net_device *dev,
 901                                       struct ieee80211_if_sta *ifsta)
 902 {
 903         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 904         struct ieee80211_sta_bss *bss;
 905         int bss_privacy;
 906         int wep_privacy;
 907         int privacy_invoked;
 908
 909         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 910                 return 0;
 911
 912         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 913                                    local->hw.conf.channel->center_freq,
 914                                    ifsta->ssid, ifsta->ssid_len);
 915         if (!bss)
 916                 return 0;
 917
 918         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 919         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 920         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 921
 922         ieee80211_rx_bss_put(dev, bss);
 923
 924         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 925                 return 0;
 926
 927         return 1;
 928 }
 929
 930
 931 static void ieee80211_associate(struct net_device *dev,
 932                                 struct ieee80211_if_sta *ifsta)
 933 {
 934         DECLARE_MAC_BUF(mac);
 935
 936         ifsta->assoc_tries++;
 937         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 938                 printk(KERN_DEBUG "%s: association with AP %s"
 939                        " timed out\n",
 940                        dev->name, print_mac(mac, ifsta->bssid));
 941                 ifsta->state = IEEE80211_DISABLED;
 942                 return;
 943         }
 944
 945         ifsta->state = IEEE80211_ASSOCIATE;
 946         printk(KERN_DEBUG "%s: associate with AP %s\n",
 947                dev->name, print_mac(mac, ifsta->bssid));
 948         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 949                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 950                        "mixed-cell disabled - abort association\n", dev->name);
 951                 ifsta->state = IEEE80211_DISABLED;
 952                 return;
 953         }
 954
 955         ieee80211_send_assoc(dev, ifsta);
 956
 957         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 958 }
 959
 960
 961 static void ieee80211_associated(struct net_device *dev,
 962                                  struct ieee80211_if_sta *ifsta)
 963 {
 964         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 965         struct sta_info *sta;
 966         int disassoc;
 967         DECLARE_MAC_BUF(mac);
 968
 969         /* TODO: start monitoring current AP signal quality and number of
 970          * missed beacons. Scan other channels every now and then and search
 971          * for better APs. */
 972         /* TODO: remove expired BSSes */
 973
 974         ifsta->state = IEEE80211_ASSOCIATED;
 975
 976         rcu_read_lock();
 977
 978         sta = sta_info_get(local, ifsta->bssid);
 979         if (!sta) {
 980                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 981                        dev->name, print_mac(mac, ifsta->bssid));
 982                 disassoc = 1;
 983         } else {
 984                 disassoc = 0;
 985                 if (time_after(jiffies,
 986                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 987                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 988                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 989                                        "current AP %s - assume out of "
 990                                        "range\n",
 991                                        dev->name, print_mac(mac, ifsta->bssid));
 992                                 disassoc = 1;
 993                                 sta_info_unlink(&sta);
 994                         } else
 995                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 996                                                          local->scan_ssid,
 997                                                          local->scan_ssid_len);
 998                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 999                 } else {
1000                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1001                         if (time_after(jiffies, ifsta->last_probe +
1002                                        IEEE80211_PROBE_INTERVAL)) {
1003                                 ifsta->last_probe = jiffies;
1004                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1005                                                          ifsta->ssid,
1006                                                          ifsta->ssid_len);
1007                         }
1008                 }
1009         }
1010
1011         rcu_read_unlock();
1012
1013         if (disassoc && sta)
1014                 sta_info_destroy(sta);
1015
1016         if (disassoc) {
1017                 ifsta->state = IEEE80211_DISABLED;
1018                 ieee80211_set_associated(dev, ifsta, 0);
1019         } else {
1020                 mod_timer(&ifsta->timer, jiffies +
1021                                       IEEE80211_MONITORING_INTERVAL);
1022         }
1023 }
1024
1025
1026 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1027                                      u8 *ssid, size_t ssid_len)
1028 {
1029         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1030         struct ieee80211_supported_band *sband;
1031         struct sk_buff *skb;
1032         struct ieee80211_mgmt *mgmt;
1033         u8 *pos, *supp_rates, *esupp_rates = NULL;
1034         int i;
1035
1036         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1037         if (!skb) {
1038                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1039                        "request\n", dev->name);
1040                 return;
1041         }
1042         skb_reserve(skb, local->hw.extra_tx_headroom);
1043
1044         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1045         memset(mgmt, 0, 24);
1046         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1047                                            IEEE80211_STYPE_PROBE_REQ);
1048         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1049         if (dst) {
1050                 memcpy(mgmt->da, dst, ETH_ALEN);
1051                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1052         } else {
1053                 memset(mgmt->da, 0xff, ETH_ALEN);
1054                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1055         }
1056         pos = skb_put(skb, 2 + ssid_len);
1057         *pos++ = WLAN_EID_SSID;
1058         *pos++ = ssid_len;
1059         memcpy(pos, ssid, ssid_len);
1060
1061         supp_rates = skb_put(skb, 2);
1062         supp_rates[0] = WLAN_EID_SUPP_RATES;
1063         supp_rates[1] = 0;
1064         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1065
1066         for (i = 0; i < sband->n_bitrates; i++) {
1067                 struct ieee80211_rate *rate = &sband->bitrates[i];
1068                 if (esupp_rates) {
1069                         pos = skb_put(skb, 1);
1070                         esupp_rates[1]++;
1071                 } else if (supp_rates[1] == 8) {
1072                         esupp_rates = skb_put(skb, 3);
1073                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1074                         esupp_rates[1] = 1;
1075                         pos = &esupp_rates[2];
1076                 } else {
1077                         pos = skb_put(skb, 1);
1078                         supp_rates[1]++;
1079                 }
1080                 *pos = rate->bitrate / 5;
1081         }
1082
1083         ieee80211_sta_tx(dev, skb, 0);
1084 }
1085
1086
1087 static int ieee80211_sta_wep_configured(struct net_device *dev)
1088 {
1089         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1090         if (!sdata || !sdata->default_key ||
1091             sdata->default_key->conf.alg != ALG_WEP)
1092                 return 0;
1093         return 1;
1094 }
1095
1096
1097 static void ieee80211_auth_completed(struct net_device *dev,
1098                                      struct ieee80211_if_sta *ifsta)
1099 {
1100         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1101         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1102         ieee80211_associate(dev, ifsta);
1103 }
1104
1105
1106 static void ieee80211_auth_challenge(struct net_device *dev,
1107                                      struct ieee80211_if_sta *ifsta,
1108                                      struct ieee80211_mgmt *mgmt,
1109                                      size_t len)
1110 {
1111         u8 *pos;
1112         struct ieee802_11_elems elems;
1113
1114         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1115         pos = mgmt->u.auth.variable;
1116         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1117         if (!elems.challenge) {
1118                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1119                        "frame\n", dev->name);
1120                 return;
1121         }
1122         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1123                             elems.challenge_len + 2, 1);
1124 }
1125
1126 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1127                                         u8 dialog_token, u16 status, u16 policy,
1128                                         u16 buf_size, u16 timeout)
1129 {
1130         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1131         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1132         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1133         struct sk_buff *skb;
1134         struct ieee80211_mgmt *mgmt;
1135         u16 capab;
1136
1137         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1138
1139         if (!skb) {
1140                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1141                        "for addba resp frame\n", dev->name);
1142                 return;
1143         }
1144
1145         skb_reserve(skb, local->hw.extra_tx_headroom);
1146         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1147         memset(mgmt, 0, 24);
1148         memcpy(mgmt->da, da, ETH_ALEN);
1149         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1150         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1151                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1152         else
1153                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1154         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1155                                            IEEE80211_STYPE_ACTION);
1156
1157         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1158         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1159         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1160         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1161
1162         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1163         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1164         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1165
1166         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1167         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1168         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1169
1170         ieee80211_sta_tx(dev, skb, 0);
1171
1172         return;
1173 }
1174
1175 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1176                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1177                                 u16 agg_size, u16 timeout)
1178 {
1179         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1180         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1181         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1182         struct sk_buff *skb;
1183         struct ieee80211_mgmt *mgmt;
1184         u16 capab;
1185
1186         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1187
1188         if (!skb) {
1189                 printk(KERN_ERR "%s: failed to allocate buffer "
1190                                 "for addba request frame\n", dev->name);
1191                 return;
1192         }
1193         skb_reserve(skb, local->hw.extra_tx_headroom);
1194         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1195         memset(mgmt, 0, 24);
1196         memcpy(mgmt->da, da, ETH_ALEN);
1197         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1198         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1199                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1200         else
1201                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1202
1203         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1204                                         IEEE80211_STYPE_ACTION);
1205
1206         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1207
1208         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1209         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1210
1211         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1212         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1213         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1214         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1215
1216         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1217
1218         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1219         mgmt->u.action.u.addba_req.start_seq_num =
1220                                         cpu_to_le16(start_seq_num << 4);
1221
1222         ieee80211_sta_tx(dev, skb, 0);
1223 }
1224
1225 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1226                                                 struct ieee80211_mgmt *mgmt,
1227                                                 size_t len)
1228 {
1229         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1230         struct ieee80211_hw *hw = &local->hw;
1231         struct ieee80211_conf *conf = &hw->conf;
1232         struct sta_info *sta;
1233         struct tid_ampdu_rx *tid_agg_rx;
1234         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1235         u8 dialog_token;
1236         int ret = -EOPNOTSUPP;
1237         DECLARE_MAC_BUF(mac);
1238
1239         rcu_read_lock();
1240
1241         sta = sta_info_get(local, mgmt->sa);
1242         if (!sta) {
1243                 rcu_read_unlock();
1244                 return;
1245         }
1246
1247         /* extract session parameters from addba request frame */
1248         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1249         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1250         start_seq_num =
1251                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1252
1253         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1254         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1255         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1256         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1257
1258         status = WLAN_STATUS_REQUEST_DECLINED;
1259
1260         /* sanity check for incoming parameters:
1261          * check if configuration can support the BA policy
1262          * and if buffer size does not exceeds max value */
1263         if (((ba_policy != 1)
1264                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1265                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1266                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1267 #ifdef CONFIG_MAC80211_HT_DEBUG
1268                 if (net_ratelimit())
1269                         printk(KERN_DEBUG "AddBA Req with bad params from "
1270                                 "%s on tid %u. policy %d, buffer size %d\n",
1271                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1272                                 buf_size);
1273 #endif /* CONFIG_MAC80211_HT_DEBUG */
1274                 goto end_no_lock;
1275         }
1276         /* determine default buffer size */
1277         if (buf_size == 0) {
1278                 struct ieee80211_supported_band *sband;
1279
1280                 sband = local->hw.wiphy->bands[conf->channel->band];
1281                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1282                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1283         }
1284
1285
1286         /* examine state machine */
1287         spin_lock_bh(&sta->lock);
1288
1289         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1290 #ifdef CONFIG_MAC80211_HT_DEBUG
1291                 if (net_ratelimit())
1292                         printk(KERN_DEBUG "unexpected AddBA Req from "
1293                                 "%s on tid %u\n",
1294                                 print_mac(mac, mgmt->sa), tid);
1295 #endif /* CONFIG_MAC80211_HT_DEBUG */
1296                 goto end;
1297         }
1298
1299         /* prepare A-MPDU MLME for Rx aggregation */
1300         sta->ampdu_mlme.tid_rx[tid] =
1301                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1302         if (!sta->ampdu_mlme.tid_rx[tid]) {
1303                 if (net_ratelimit())
1304                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1305                                         tid);
1306                 goto end;
1307         }
1308         /* rx timer */
1309         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1310                                 sta_rx_agg_session_timer_expired;
1311         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1312                                 (unsigned long)&sta->timer_to_tid[tid];
1313         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1314
1315         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1316
1317         /* prepare reordering buffer */
1318         tid_agg_rx->reorder_buf =
1319                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1320         if (!tid_agg_rx->reorder_buf) {
1321                 if (net_ratelimit())
1322                         printk(KERN_ERR "can not allocate reordering buffer "
1323                                "to tid %d\n", tid);
1324                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1325                 goto end;
1326         }
1327         memset(tid_agg_rx->reorder_buf, 0,
1328                 buf_size * sizeof(struct sk_buf *));
1329
1330         if (local->ops->ampdu_action)
1331                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1332                                                sta->addr, tid, &start_seq_num);
1333 #ifdef CONFIG_MAC80211_HT_DEBUG
1334         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1335 #endif /* CONFIG_MAC80211_HT_DEBUG */
1336
1337         if (ret) {
1338                 kfree(tid_agg_rx->reorder_buf);
1339                 kfree(tid_agg_rx);
1340                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1341                 goto end;
1342         }
1343
1344         /* change state and send addba resp */
1345         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1346         tid_agg_rx->dialog_token = dialog_token;
1347         tid_agg_rx->ssn = start_seq_num;
1348         tid_agg_rx->head_seq_num = start_seq_num;
1349         tid_agg_rx->buf_size = buf_size;
1350         tid_agg_rx->timeout = timeout;
1351         tid_agg_rx->stored_mpdu_num = 0;
1352         status = WLAN_STATUS_SUCCESS;
1353 end:
1354         spin_unlock_bh(&sta->lock);
1355
1356 end_no_lock:
1357         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1358                                   dialog_token, status, 1, buf_size, timeout);
1359         rcu_read_unlock();
1360 }
1361
1362 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1363                                              struct ieee80211_mgmt *mgmt,
1364                                              size_t len)
1365 {
1366         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1367         struct ieee80211_hw *hw = &local->hw;
1368         struct sta_info *sta;
1369         u16 capab;
1370         u16 tid;
1371         u8 *state;
1372
1373         rcu_read_lock();
1374
1375         sta = sta_info_get(local, mgmt->sa);
1376         if (!sta) {
1377                 rcu_read_unlock();
1378                 return;
1379         }
1380
1381         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1382         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1383
1384         state = &sta->ampdu_mlme.tid_state_tx[tid];
1385
1386         spin_lock_bh(&sta->lock);
1387
1388         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1389                 spin_unlock_bh(&sta->lock);
1390                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1391                         "%d\n", *state);
1392                 goto addba_resp_exit;
1393         }
1394
1395         if (mgmt->u.action.u.addba_resp.dialog_token !=
1396                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1397                 spin_unlock_bh(&sta->lock);
1398 #ifdef CONFIG_MAC80211_HT_DEBUG
1399                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1400 #endif /* CONFIG_MAC80211_HT_DEBUG */
1401                 goto addba_resp_exit;
1402         }
1403
1404         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1405 #ifdef CONFIG_MAC80211_HT_DEBUG
1406         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1407 #endif /* CONFIG_MAC80211_HT_DEBUG */
1408         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1409                         == WLAN_STATUS_SUCCESS) {
1410                 if (*state & HT_ADDBA_RECEIVED_MSK)
1411                         printk(KERN_DEBUG "double addBA response\n");
1412
1413                 *state |= HT_ADDBA_RECEIVED_MSK;
1414                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1415
1416                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1417                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1418                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1419                 }
1420
1421                 spin_unlock_bh(&sta->lock);
1422                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1423         } else {
1424                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1425
1426                 sta->ampdu_mlme.addba_req_num[tid]++;
1427                 /* this will allow the state check in stop_BA_session */
1428                 *state = HT_AGG_STATE_OPERATIONAL;
1429                 spin_unlock_bh(&sta->lock);
1430                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1431                                              WLAN_BACK_INITIATOR);
1432         }
1433
1434 addba_resp_exit:
1435         rcu_read_unlock();
1436 }
1437
1438 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1439                           u16 initiator, u16 reason_code)
1440 {
1441         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1442         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1443         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1444         struct sk_buff *skb;
1445         struct ieee80211_mgmt *mgmt;
1446         u16 params;
1447
1448         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1449
1450         if (!skb) {
1451                 printk(KERN_ERR "%s: failed to allocate buffer "
1452                                         "for delba frame\n", dev->name);
1453                 return;
1454         }
1455
1456         skb_reserve(skb, local->hw.extra_tx_headroom);
1457         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1458         memset(mgmt, 0, 24);
1459         memcpy(mgmt->da, da, ETH_ALEN);
1460         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1461         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1462                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1463         else
1464                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1465         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1466                                         IEEE80211_STYPE_ACTION);
1467
1468         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1469
1470         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1471         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1472         params = (u16)(initiator << 11);        /* bit 11 initiator */
1473         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1474
1475         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1476         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1477
1478         ieee80211_sta_tx(dev, skb, 0);
1479 }
1480
1481 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1482                                         u16 initiator, u16 reason)
1483 {
1484         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1485         struct ieee80211_hw *hw = &local->hw;
1486         struct sta_info *sta;
1487         int ret, i;
1488         DECLARE_MAC_BUF(mac);
1489
1490         rcu_read_lock();
1491
1492         sta = sta_info_get(local, ra);
1493         if (!sta) {
1494                 rcu_read_unlock();
1495                 return;
1496         }
1497
1498         /* check if TID is in operational state */
1499         spin_lock_bh(&sta->lock);
1500         if (sta->ampdu_mlme.tid_state_rx[tid]
1501                                 != HT_AGG_STATE_OPERATIONAL) {
1502                 spin_unlock_bh(&sta->lock);
1503                 rcu_read_unlock();
1504                 return;
1505         }
1506         sta->ampdu_mlme.tid_state_rx[tid] =
1507                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1508                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1509         spin_unlock_bh(&sta->lock);
1510
1511         /* stop HW Rx aggregation. ampdu_action existence
1512          * already verified in session init so we add the BUG_ON */
1513         BUG_ON(!local->ops->ampdu_action);
1514
1515 #ifdef CONFIG_MAC80211_HT_DEBUG
1516         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1517                                 print_mac(mac, ra), tid);
1518 #endif /* CONFIG_MAC80211_HT_DEBUG */
1519
1520         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1521                                         ra, tid, NULL);
1522         if (ret)
1523                 printk(KERN_DEBUG "HW problem - can not stop rx "
1524                                 "aggergation for tid %d\n", tid);
1525
1526         /* shutdown timer has not expired */
1527         if (initiator != WLAN_BACK_TIMER)
1528                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1529
1530         /* check if this is a self generated aggregation halt */
1531         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1532                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1533
1534         /* free the reordering buffer */
1535         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1536                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1537                         /* release the reordered frames */
1538                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1539                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1540                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1541                 }
1542         }
1543         /* free resources */
1544         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1545         kfree(sta->ampdu_mlme.tid_rx[tid]);
1546         sta->ampdu_mlme.tid_rx[tid] = NULL;
1547         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1548
1549         rcu_read_unlock();
1550 }
1551
1552
1553 static void ieee80211_sta_process_delba(struct net_device *dev,
1554                         struct ieee80211_mgmt *mgmt, size_t len)
1555 {
1556         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1557         struct sta_info *sta;
1558         u16 tid, params;
1559         u16 initiator;
1560         DECLARE_MAC_BUF(mac);
1561
1562         rcu_read_lock();
1563
1564         sta = sta_info_get(local, mgmt->sa);
1565         if (!sta) {
1566                 rcu_read_unlock();
1567                 return;
1568         }
1569
1570         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1571         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1572         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1573
1574 #ifdef CONFIG_MAC80211_HT_DEBUG
1575         if (net_ratelimit())
1576                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1577                         print_mac(mac, mgmt->sa),
1578                         initiator ? "initiator" : "recipient", tid,
1579                         mgmt->u.action.u.delba.reason_code);
1580 #endif /* CONFIG_MAC80211_HT_DEBUG */
1581
1582         if (initiator == WLAN_BACK_INITIATOR)
1583                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1584                                                  WLAN_BACK_INITIATOR, 0);
1585         else { /* WLAN_BACK_RECIPIENT */
1586                 spin_lock_bh(&sta->lock);
1587                 sta->ampdu_mlme.tid_state_tx[tid] =
1588                                 HT_AGG_STATE_OPERATIONAL;
1589                 spin_unlock_bh(&sta->lock);
1590                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1591                                              WLAN_BACK_RECIPIENT);
1592         }
1593         rcu_read_unlock();
1594 }
1595
1596 /*
1597  * After sending add Block Ack request we activated a timer until
1598  * add Block Ack response will arrive from the recipient.
1599  * If this timer expires sta_addba_resp_timer_expired will be executed.
1600  */
1601 void sta_addba_resp_timer_expired(unsigned long data)
1602 {
1603         /* not an elegant detour, but there is no choice as the timer passes
1604          * only one argument, and both sta_info and TID are needed, so init
1605          * flow in sta_info_create gives the TID as data, while the timer_to_id
1606          * array gives the sta through container_of */
1607         u16 tid = *(int *)data;
1608         struct sta_info *temp_sta = container_of((void *)data,
1609                 struct sta_info, timer_to_tid[tid]);
1610
1611         struct ieee80211_local *local = temp_sta->local;
1612         struct ieee80211_hw *hw = &local->hw;
1613         struct sta_info *sta;
1614         u8 *state;
1615
1616         rcu_read_lock();
1617
1618         sta = sta_info_get(local, temp_sta->addr);
1619         if (!sta) {
1620                 rcu_read_unlock();
1621                 return;
1622         }
1623
1624         state = &sta->ampdu_mlme.tid_state_tx[tid];
1625         /* check if the TID waits for addBA response */
1626         spin_lock_bh(&sta->lock);
1627         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1628                 spin_unlock_bh(&sta->lock);
1629                 *state = HT_AGG_STATE_IDLE;
1630                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1631                                 "expecting addBA response there", tid);
1632                 goto timer_expired_exit;
1633         }
1634
1635         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1636
1637         /* go through the state check in stop_BA_session */
1638         *state = HT_AGG_STATE_OPERATIONAL;
1639         spin_unlock_bh(&sta->lock);
1640         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1641                                      WLAN_BACK_INITIATOR);
1642
1643 timer_expired_exit:
1644         rcu_read_unlock();
1645 }
1646
1647 /*
1648  * After accepting the AddBA Request we activated a timer,
1649  * resetting it after each frame that arrives from the originator.
1650  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1651  */
1652 static void sta_rx_agg_session_timer_expired(unsigned long data)
1653 {
1654         /* not an elegant detour, but there is no choice as the timer passes
1655          * only one argument, and verious sta_info are needed here, so init
1656          * flow in sta_info_create gives the TID as data, while the timer_to_id
1657          * array gives the sta through container_of */
1658         u8 *ptid = (u8 *)data;
1659         u8 *timer_to_id = ptid - *ptid;
1660         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1661                                          timer_to_tid[0]);
1662
1663         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1664         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1665                                          (u16)*ptid, WLAN_BACK_TIMER,
1666                                          WLAN_REASON_QSTA_TIMEOUT);
1667 }
1668
1669 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1670 {
1671         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1672         int i;
1673
1674         for (i = 0; i <  STA_TID_NUM; i++) {
1675                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1676                                              WLAN_BACK_INITIATOR);
1677                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1678                                                  WLAN_BACK_RECIPIENT,
1679                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1680         }
1681 }
1682
1683 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1684                                    struct ieee80211_if_sta *ifsta,
1685                                    struct ieee80211_mgmt *mgmt,
1686                                    size_t len)
1687 {
1688         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1689         u16 auth_alg, auth_transaction, status_code;
1690         DECLARE_MAC_BUF(mac);
1691
1692         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1693             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1694                 printk(KERN_DEBUG "%s: authentication frame received from "
1695                        "%s, but not in authenticate state - ignored\n",
1696                        dev->name, print_mac(mac, mgmt->sa));
1697                 return;
1698         }
1699
1700         if (len < 24 + 6) {
1701                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1702                        "received from %s - ignored\n",
1703                        dev->name, len, print_mac(mac, mgmt->sa));
1704                 return;
1705         }
1706
1707         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1708             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1709                 printk(KERN_DEBUG "%s: authentication frame received from "
1710                        "unknown AP (SA=%s BSSID=%s) - "
1711                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1712                        print_mac(mac, mgmt->bssid));
1713                 return;
1714         }
1715
1716         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1717             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1718                 printk(KERN_DEBUG "%s: authentication frame received from "
1719                        "unknown BSSID (SA=%s BSSID=%s) - "
1720                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1721                        print_mac(mac, mgmt->bssid));
1722                 return;
1723         }
1724
1725         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1726         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1727         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1728
1729         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1730                "transaction=%d status=%d)\n",
1731                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1732                auth_transaction, status_code);
1733
1734         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1735                 /* IEEE 802.11 standard does not require authentication in IBSS
1736                  * networks and most implementations do not seem to use it.
1737                  * However, try to reply to authentication attempts if someone
1738                  * has actually implemented this.
1739                  * TODO: Could implement shared key authentication. */
1740                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1741                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1742                                "frame (alg=%d transaction=%d)\n",
1743                                dev->name, auth_alg, auth_transaction);
1744                         return;
1745                 }
1746                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1747         }
1748
1749         if (auth_alg != ifsta->auth_alg ||
1750             auth_transaction != ifsta->auth_transaction) {
1751                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1752                        "(alg=%d transaction=%d)\n",
1753                        dev->name, auth_alg, auth_transaction);
1754                 return;
1755         }
1756
1757         if (status_code != WLAN_STATUS_SUCCESS) {
1758                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1759                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1760                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1761                         u8 algs[3];
1762                         const int num_algs = ARRAY_SIZE(algs);
1763                         int i, pos;
1764                         algs[0] = algs[1] = algs[2] = 0xff;
1765                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1766                                 algs[0] = WLAN_AUTH_OPEN;
1767                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1768                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1769                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1770                                 algs[2] = WLAN_AUTH_LEAP;
1771                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1772                                 pos = 0;
1773                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1774                                 pos = 1;
1775                         else
1776                                 pos = 2;
1777                         for (i = 0; i < num_algs; i++) {
1778                                 pos++;
1779                                 if (pos >= num_algs)
1780                                         pos = 0;
1781                                 if (algs[pos] == ifsta->auth_alg ||
1782                                     algs[pos] == 0xff)
1783                                         continue;
1784                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1785                                     !ieee80211_sta_wep_configured(dev))
1786                                         continue;
1787                                 ifsta->auth_alg = algs[pos];
1788                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1789                                        "next try\n",
1790                                        dev->name, ifsta->auth_alg);
1791                                 break;
1792                         }
1793                 }
1794                 return;
1795         }
1796
1797         switch (ifsta->auth_alg) {
1798         case WLAN_AUTH_OPEN:
1799         case WLAN_AUTH_LEAP:
1800                 ieee80211_auth_completed(dev, ifsta);
1801                 break;
1802         case WLAN_AUTH_SHARED_KEY:
1803                 if (ifsta->auth_transaction == 4)
1804                         ieee80211_auth_completed(dev, ifsta);
1805                 else
1806                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1807                 break;
1808         }
1809 }
1810
1811
1812 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1813                                      struct ieee80211_if_sta *ifsta,
1814                                      struct ieee80211_mgmt *mgmt,
1815                                      size_t len)
1816 {
1817         u16 reason_code;
1818         DECLARE_MAC_BUF(mac);
1819
1820         if (len < 24 + 2) {
1821                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1822                        "received from %s - ignored\n",
1823                        dev->name, len, print_mac(mac, mgmt->sa));
1824                 return;
1825         }
1826
1827         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1828                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1829                        "unknown AP (SA=%s BSSID=%s) - "
1830                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1831                        print_mac(mac, mgmt->bssid));
1832                 return;
1833         }
1834
1835         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1836
1837         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1838                " (reason=%d)\n",
1839                dev->name, print_mac(mac, mgmt->sa), reason_code);
1840
1841         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1842                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1843
1844         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1845             ifsta->state == IEEE80211_ASSOCIATE ||
1846             ifsta->state == IEEE80211_ASSOCIATED) {
1847                 ifsta->state = IEEE80211_AUTHENTICATE;
1848                 mod_timer(&ifsta->timer, jiffies +
1849                                       IEEE80211_RETRY_AUTH_INTERVAL);
1850         }
1851
1852         ieee80211_set_disassoc(dev, ifsta, 1);
1853         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1854 }
1855
1856
1857 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1858                                        struct ieee80211_if_sta *ifsta,
1859                                        struct ieee80211_mgmt *mgmt,
1860                                        size_t len)
1861 {
1862         u16 reason_code;
1863         DECLARE_MAC_BUF(mac);
1864
1865         if (len < 24 + 2) {
1866                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1867                        "received from %s - ignored\n",
1868                        dev->name, len, print_mac(mac, mgmt->sa));
1869                 return;
1870         }
1871
1872         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1873                 printk(KERN_DEBUG "%s: disassociation frame received from "
1874                        "unknown AP (SA=%s BSSID=%s) - "
1875                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1876                        print_mac(mac, mgmt->bssid));
1877                 return;
1878         }
1879
1880         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1881
1882         printk(KERN_DEBUG "%s: RX disassociation from %s"
1883                " (reason=%d)\n",
1884                dev->name, print_mac(mac, mgmt->sa), reason_code);
1885
1886         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1887                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1888
1889         if (ifsta->state == IEEE80211_ASSOCIATED) {
1890                 ifsta->state = IEEE80211_ASSOCIATE;
1891                 mod_timer(&ifsta->timer, jiffies +
1892                                       IEEE80211_RETRY_AUTH_INTERVAL);
1893         }
1894
1895         ieee80211_set_disassoc(dev, ifsta, 0);
1896 }
1897
1898
1899 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1900                                          struct ieee80211_if_sta *ifsta,
1901                                          struct ieee80211_mgmt *mgmt,
1902                                          size_t len,
1903                                          int reassoc)
1904 {
1905         struct ieee80211_local *local = sdata->local;
1906         struct net_device *dev = sdata->dev;
1907         struct ieee80211_supported_band *sband;
1908         struct sta_info *sta;
1909         u64 rates, basic_rates;
1910         u16 capab_info, status_code, aid;
1911         struct ieee802_11_elems elems;
1912         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1913         u8 *pos;
1914         int i, j;
1915         DECLARE_MAC_BUF(mac);
1916         bool have_higher_than_11mbit = false;
1917
1918         /* AssocResp and ReassocResp have identical structure, so process both
1919          * of them in this function. */
1920
1921         if (ifsta->state != IEEE80211_ASSOCIATE) {
1922                 printk(KERN_DEBUG "%s: association frame received from "
1923                        "%s, but not in associate state - ignored\n",
1924                        dev->name, print_mac(mac, mgmt->sa));
1925                 return;
1926         }
1927
1928         if (len < 24 + 6) {
1929                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1930                        "received from %s - ignored\n",
1931                        dev->name, len, print_mac(mac, mgmt->sa));
1932                 return;
1933         }
1934
1935         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1936                 printk(KERN_DEBUG "%s: association frame received from "
1937                        "unknown AP (SA=%s BSSID=%s) - "
1938                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1939                        print_mac(mac, mgmt->bssid));
1940                 return;
1941         }
1942
1943         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1944         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1945         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1946
1947         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1948                "status=%d aid=%d)\n",
1949                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1950                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1951
1952         if (status_code != WLAN_STATUS_SUCCESS) {
1953                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1954                        dev->name, status_code);
1955                 /* if this was a reassociation, ensure we try a "full"
1956                  * association next time. This works around some broken APs
1957                  * which do not correctly reject reassociation requests. */
1958                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1959                 return;
1960         }
1961
1962         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1963                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1964                        "set\n", dev->name, aid);
1965         aid &= ~(BIT(15) | BIT(14));
1966
1967         pos = mgmt->u.assoc_resp.variable;
1968         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1969
1970         if (!elems.supp_rates) {
1971                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1972                        dev->name);
1973                 return;
1974         }
1975
1976         printk(KERN_DEBUG "%s: associated\n", dev->name);
1977         ifsta->aid = aid;
1978         ifsta->ap_capab = capab_info;
1979
1980         kfree(ifsta->assocresp_ies);
1981         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1982         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1983         if (ifsta->assocresp_ies)
1984                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1985
1986         rcu_read_lock();
1987
1988         /* Add STA entry for the AP */
1989         sta = sta_info_get(local, ifsta->bssid);
1990         if (!sta) {
1991                 struct ieee80211_sta_bss *bss;
1992                 int err;
1993
1994                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1995                 if (!sta) {
1996                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1997                                " the AP\n", dev->name);
1998                         rcu_read_unlock();
1999                         return;
2000                 }
2001                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2002                                            local->hw.conf.channel->center_freq,
2003                                            ifsta->ssid, ifsta->ssid_len);
2004                 if (bss) {
2005                         sta->last_signal = bss->signal;
2006                         sta->last_qual = bss->qual;
2007                         sta->last_noise = bss->noise;
2008                         ieee80211_rx_bss_put(dev, bss);
2009                 }
2010
2011                 err = sta_info_insert(sta);
2012                 if (err) {
2013                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2014                                " the AP (error %d)\n", dev->name, err);
2015                         rcu_read_unlock();
2016                         return;
2017                 }
2018         }
2019
2020         /*
2021          * FIXME: Do we really need to update the sta_info's information here?
2022          *        We already know about the AP (we found it in our list) so it
2023          *        should already be filled with the right info, no?
2024          *        As is stands, all this is racy because typically we assume
2025          *        the information that is filled in here (except flags) doesn't
2026          *        change while a STA structure is alive. As such, it should move
2027          *        to between the sta_info_alloc() and sta_info_insert() above.
2028          */
2029
2030         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2031                            WLAN_STA_AUTHORIZED);
2032
2033         rates = 0;
2034         basic_rates = 0;
2035         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2036
2037         for (i = 0; i < elems.supp_rates_len; i++) {
2038                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2039
2040                 if (rate > 110)
2041                         have_higher_than_11mbit = true;
2042
2043                 for (j = 0; j < sband->n_bitrates; j++) {
2044                         if (sband->bitrates[j].bitrate == rate)
2045                                 rates |= BIT(j);
2046                         if (elems.supp_rates[i] & 0x80)
2047                                 basic_rates |= BIT(j);
2048                 }
2049         }
2050
2051         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2052                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2053
2054                 if (rate > 110)
2055                         have_higher_than_11mbit = true;
2056
2057                 for (j = 0; j < sband->n_bitrates; j++) {
2058                         if (sband->bitrates[j].bitrate == rate)
2059                                 rates |= BIT(j);
2060                         if (elems.ext_supp_rates[i] & 0x80)
2061                                 basic_rates |= BIT(j);
2062                 }
2063         }
2064
2065         sta->supp_rates[local->hw.conf.channel->band] = rates;
2066         sdata->basic_rates = basic_rates;
2067
2068         /* cf. IEEE 802.11 9.2.12 */
2069         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2070             have_higher_than_11mbit)
2071                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2072         else
2073                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2074
2075         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2076             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2077                 struct ieee80211_ht_bss_info bss_info;
2078                 ieee80211_ht_cap_ie_to_ht_info(
2079                                 (struct ieee80211_ht_cap *)
2080                                 elems.ht_cap_elem, &sta->ht_info);
2081                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2082                                 (struct ieee80211_ht_addt_info *)
2083                                 elems.ht_info_elem, &bss_info);
2084                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2085         }
2086
2087         rate_control_rate_init(sta, local);
2088
2089         if (elems.wmm_param) {
2090                 set_sta_flags(sta, WLAN_STA_WME);
2091                 rcu_read_unlock();
2092                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2093                                          elems.wmm_param_len);
2094         } else
2095                 rcu_read_unlock();
2096
2097         /* set AID and assoc capability,
2098          * ieee80211_set_associated() will tell the driver */
2099         bss_conf->aid = aid;
2100         bss_conf->assoc_capability = capab_info;
2101         ieee80211_set_associated(dev, ifsta, 1);
2102
2103         ieee80211_associated(dev, ifsta);
2104 }
2105
2106
2107 /* Caller must hold local->sta_bss_lock */
2108 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2109                                         struct ieee80211_sta_bss *bss)
2110 {
2111         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2112         u8 hash_idx;
2113
2114         if (bss_mesh_cfg(bss))
2115                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2116                                         bss_mesh_id_len(bss));
2117         else
2118                 hash_idx = STA_HASH(bss->bssid);
2119
2120         bss->hnext = local->sta_bss_hash[hash_idx];
2121         local->sta_bss_hash[hash_idx] = bss;
2122 }
2123
2124
2125 /* Caller must hold local->sta_bss_lock */
2126 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2127                                         struct ieee80211_sta_bss *bss)
2128 {
2129         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2130         struct ieee80211_sta_bss *b, *prev = NULL;
2131         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2132         while (b) {
2133                 if (b == bss) {
2134                         if (!prev)
2135                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2136                                         bss->hnext;
2137                         else
2138                                 prev->hnext = bss->hnext;
2139                         break;
2140                 }
2141                 prev = b;
2142                 b = b->hnext;
2143         }
2144 }
2145
2146
2147 static struct ieee80211_sta_bss *
2148 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2149                      u8 *ssid, u8 ssid_len)
2150 {
2151         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2152         struct ieee80211_sta_bss *bss;
2153
2154         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2155         if (!bss)
2156                 return NULL;
2157         atomic_inc(&bss->users);
2158         atomic_inc(&bss->users);
2159         memcpy(bss->bssid, bssid, ETH_ALEN);
2160         bss->freq = freq;
2161         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2162                 memcpy(bss->ssid, ssid, ssid_len);
2163                 bss->ssid_len = ssid_len;
2164         }
2165
2166         spin_lock_bh(&local->sta_bss_lock);
2167         /* TODO: order by RSSI? */
2168         list_add_tail(&bss->list, &local->sta_bss_list);
2169         __ieee80211_rx_bss_hash_add(dev, bss);
2170         spin_unlock_bh(&local->sta_bss_lock);
2171         return bss;
2172 }
2173
2174 static struct ieee80211_sta_bss *
2175 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2176                      u8 *ssid, u8 ssid_len)
2177 {
2178         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2179         struct ieee80211_sta_bss *bss;
2180
2181         spin_lock_bh(&local->sta_bss_lock);
2182         bss = local->sta_bss_hash[STA_HASH(bssid)];
2183         while (bss) {
2184                 if (!bss_mesh_cfg(bss) &&
2185                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2186                     bss->freq == freq &&
2187                     bss->ssid_len == ssid_len &&
2188                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2189                         atomic_inc(&bss->users);
2190                         break;
2191                 }
2192                 bss = bss->hnext;
2193         }
2194         spin_unlock_bh(&local->sta_bss_lock);
2195         return bss;
2196 }
2197
2198 #ifdef CONFIG_MAC80211_MESH
2199 static struct ieee80211_sta_bss *
2200 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2201                           u8 *mesh_cfg, int freq)
2202 {
2203         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2204         struct ieee80211_sta_bss *bss;
2205
2206         spin_lock_bh(&local->sta_bss_lock);
2207         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2208         while (bss) {
2209                 if (bss_mesh_cfg(bss) &&
2210                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2211                     bss->freq == freq &&
2212                     mesh_id_len == bss->mesh_id_len &&
2213                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2214                                                  mesh_id_len))) {
2215                         atomic_inc(&bss->users);
2216                         break;
2217                 }
2218                 bss = bss->hnext;
2219         }
2220         spin_unlock_bh(&local->sta_bss_lock);
2221         return bss;
2222 }
2223
2224 static struct ieee80211_sta_bss *
2225 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2226                           u8 *mesh_cfg, int mesh_config_len, int freq)
2227 {
2228         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2229         struct ieee80211_sta_bss *bss;
2230
2231         if (mesh_config_len != MESH_CFG_LEN)
2232                 return NULL;
2233
2234         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2235         if (!bss)
2236                 return NULL;
2237
2238         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2239         if (!bss->mesh_cfg) {
2240                 kfree(bss);
2241                 return NULL;
2242         }
2243
2244         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2245                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2246                 if (!bss->mesh_id) {
2247                         kfree(bss->mesh_cfg);
2248                         kfree(bss);
2249                         return NULL;
2250                 }
2251                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2252         }
2253
2254         atomic_inc(&bss->users);
2255         atomic_inc(&bss->users);
2256         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2257         bss->mesh_id_len = mesh_id_len;
2258         bss->freq = freq;
2259         spin_lock_bh(&local->sta_bss_lock);
2260         /* TODO: order by RSSI? */
2261         list_add_tail(&bss->list, &local->sta_bss_list);
2262         __ieee80211_rx_bss_hash_add(dev, bss);
2263         spin_unlock_bh(&local->sta_bss_lock);
2264         return bss;
2265 }
2266 #endif
2267
2268 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2269 {
2270         kfree(bss->wpa_ie);
2271         kfree(bss->rsn_ie);
2272         kfree(bss->wmm_ie);
2273         kfree(bss->ht_ie);
2274         kfree(bss_mesh_id(bss));
2275         kfree(bss_mesh_cfg(bss));
2276         kfree(bss);
2277 }
2278
2279
2280 static void ieee80211_rx_bss_put(struct net_device *dev,
2281                                  struct ieee80211_sta_bss *bss)
2282 {
2283         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2284
2285         local_bh_disable();
2286         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2287                 local_bh_enable();
2288                 return;
2289         }
2290
2291         __ieee80211_rx_bss_hash_del(dev, bss);
2292         list_del(&bss->list);
2293         spin_unlock_bh(&local->sta_bss_lock);
2294         ieee80211_rx_bss_free(bss);
2295 }
2296
2297
2298 void ieee80211_rx_bss_list_init(struct net_device *dev)
2299 {
2300         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2301         spin_lock_init(&local->sta_bss_lock);
2302         INIT_LIST_HEAD(&local->sta_bss_list);
2303 }
2304
2305
2306 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2307 {
2308         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2309         struct ieee80211_sta_bss *bss, *tmp;
2310
2311         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2312                 ieee80211_rx_bss_put(dev, bss);
2313 }
2314
2315
2316 static int ieee80211_sta_join_ibss(struct net_device *dev,
2317                                    struct ieee80211_if_sta *ifsta,
2318                                    struct ieee80211_sta_bss *bss)
2319 {
2320         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2321         int res, rates, i, j;
2322         struct sk_buff *skb;
2323         struct ieee80211_mgmt *mgmt;
2324         struct ieee80211_tx_control control;
2325         struct rate_selection ratesel;
2326         u8 *pos;
2327         struct ieee80211_sub_if_data *sdata;
2328         struct ieee80211_supported_band *sband;
2329
2330         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2331
2332         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2333
2334         /* Remove possible STA entries from other IBSS networks. */
2335         sta_info_flush_delayed(sdata);
2336
2337         if (local->ops->reset_tsf) {
2338                 /* Reset own TSF to allow time synchronization work. */
2339                 local->ops->reset_tsf(local_to_hw(local));
2340         }
2341         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2342         res = ieee80211_if_config(dev);
2343         if (res)
2344                 return res;
2345
2346         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2347
2348         sdata->drop_unencrypted = bss->capability &
2349                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2350
2351         res = ieee80211_set_freq(local, bss->freq);
2352
2353         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2354                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2355                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2356                 return -1;
2357         }
2358
2359         /* Set beacon template */
2360         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2361         do {
2362                 if (!skb)
2363                         break;
2364
2365                 skb_reserve(skb, local->hw.extra_tx_headroom);
2366
2367                 mgmt = (struct ieee80211_mgmt *)
2368                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2369                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2370                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2371                                                    IEEE80211_STYPE_BEACON);
2372                 memset(mgmt->da, 0xff, ETH_ALEN);
2373                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2374                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2375                 mgmt->u.beacon.beacon_int =
2376                         cpu_to_le16(local->hw.conf.beacon_int);
2377                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2378
2379                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2380                 *pos++ = WLAN_EID_SSID;
2381                 *pos++ = ifsta->ssid_len;
2382                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2383
2384                 rates = bss->supp_rates_len;
2385                 if (rates > 8)
2386                         rates = 8;
2387                 pos = skb_put(skb, 2 + rates);
2388                 *pos++ = WLAN_EID_SUPP_RATES;
2389                 *pos++ = rates;
2390                 memcpy(pos, bss->supp_rates, rates);
2391
2392                 if (bss->band == IEEE80211_BAND_2GHZ) {
2393                         pos = skb_put(skb, 2 + 1);
2394                         *pos++ = WLAN_EID_DS_PARAMS;
2395                         *pos++ = 1;
2396                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2397                 }
2398
2399                 pos = skb_put(skb, 2 + 2);
2400                 *pos++ = WLAN_EID_IBSS_PARAMS;
2401                 *pos++ = 2;
2402                 /* FIX: set ATIM window based on scan results */
2403                 *pos++ = 0;
2404                 *pos++ = 0;
2405
2406                 if (bss->supp_rates_len > 8) {
2407                         rates = bss->supp_rates_len - 8;
2408                         pos = skb_put(skb, 2 + rates);
2409                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2410                         *pos++ = rates;
2411                         memcpy(pos, &bss->supp_rates[8], rates);
2412                 }
2413
2414                 memset(&control, 0, sizeof(control));
2415                 rate_control_get_rate(dev, sband, skb, &ratesel);
2416                 if (!ratesel.rate) {
2417                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2418                                "for IBSS beacon\n", dev->name);
2419                         break;
2420                 }
2421                 control.vif = &sdata->vif;
2422                 control.tx_rate = ratesel.rate;
2423                 if (sdata->bss_conf.use_short_preamble &&
2424                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2425                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2426                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2427                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2428                 control.retry_limit = 1;
2429
2430                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2431                 if (ifsta->probe_resp) {
2432                         mgmt = (struct ieee80211_mgmt *)
2433                                 ifsta->probe_resp->data;
2434                         mgmt->frame_control =
2435                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2436                                              IEEE80211_STYPE_PROBE_RESP);
2437                 } else {
2438                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2439                                "template for IBSS\n", dev->name);
2440                 }
2441
2442                 if (local->ops->beacon_update &&
2443                     local->ops->beacon_update(local_to_hw(local),
2444                                              skb, &control) == 0) {
2445                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2446                                "template\n", dev->name);
2447                         skb = NULL;
2448                 }
2449
2450                 rates = 0;
2451                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2452                 for (i = 0; i < bss->supp_rates_len; i++) {
2453                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2454                         for (j = 0; j < sband->n_bitrates; j++)
2455                                 if (sband->bitrates[j].bitrate == bitrate)
2456                                         rates |= BIT(j);
2457                 }
2458                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2459
2460                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2461         } while (0);
2462
2463         if (skb) {
2464                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2465                        "template\n", dev->name);
2466                 dev_kfree_skb(skb);
2467         }
2468
2469         ifsta->state = IEEE80211_IBSS_JOINED;
2470         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2471
2472         ieee80211_rx_bss_put(dev, bss);
2473
2474         return res;
2475 }
2476
2477 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2478                             struct ieee802_11_elems *elems,
2479                             enum ieee80211_band band)
2480 {
2481         struct ieee80211_supported_band *sband;
2482         struct ieee80211_rate *bitrates;
2483         size_t num_rates;
2484         u64 supp_rates;
2485         int i, j;
2486         sband = local->hw.wiphy->bands[band];
2487
2488         if (!sband) {
2489                 WARN_ON(1);
2490                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2491         }
2492
2493         bitrates = sband->bitrates;
2494         num_rates = sband->n_bitrates;
2495         supp_rates = 0;
2496         for (i = 0; i < elems->supp_rates_len +
2497                      elems->ext_supp_rates_len; i++) {
2498                 u8 rate = 0;
2499                 int own_rate;
2500                 if (i < elems->supp_rates_len)
2501                         rate = elems->supp_rates[i];
2502                 else if (elems->ext_supp_rates)
2503                         rate = elems->ext_supp_rates
2504                                 [i - elems->supp_rates_len];
2505                 own_rate = 5 * (rate & 0x7f);
2506                 for (j = 0; j < num_rates; j++)
2507                         if (bitrates[j].bitrate == own_rate)
2508                                 supp_rates |= BIT(j);
2509         }
2510         return supp_rates;
2511 }
2512
2513
2514 static void ieee80211_rx_bss_info(struct net_device *dev,
2515                                   struct ieee80211_mgmt *mgmt,
2516                                   size_t len,
2517                                   struct ieee80211_rx_status *rx_status,
2518                                   int beacon)
2519 {
2520         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2521         struct ieee802_11_elems elems;
2522         size_t baselen;
2523         int freq, clen;
2524         struct ieee80211_sta_bss *bss;
2525         struct sta_info *sta;
2526         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2527         u64 beacon_timestamp, rx_timestamp;
2528         struct ieee80211_channel *channel;
2529         DECLARE_MAC_BUF(mac);
2530         DECLARE_MAC_BUF(mac2);
2531
2532         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2533                 return; /* ignore ProbeResp to foreign address */
2534
2535 #if 0
2536         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2537                dev->name, beacon ? "Beacon" : "Probe Response",
2538                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2539 #endif
2540
2541         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2542         if (baselen > len)
2543                 return;
2544
2545         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2546         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2547
2548         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2549             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2550                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2551                                                 rx_status->band);
2552
2553                 mesh_neighbour_update(mgmt->sa, rates, dev,
2554                                       mesh_peer_accepts_plinks(&elems, dev));
2555         }
2556
2557         rcu_read_lock();
2558
2559         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2560             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2561             (sta = sta_info_get(local, mgmt->sa))) {
2562                 u64 prev_rates;
2563                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2564                                                         rx_status->band);
2565
2566                 prev_rates = sta->supp_rates[rx_status->band];
2567                 sta->supp_rates[rx_status->band] &= supp_rates;
2568                 if (sta->supp_rates[rx_status->band] == 0) {
2569                         /* No matching rates - this should not really happen.
2570                          * Make sure that at least one rate is marked
2571                          * supported to avoid issues with TX rate ctrl. */
2572                         sta->supp_rates[rx_status->band] =
2573                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2574                 }
2575                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2576                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2577                                "%s based on beacon info (0x%llx & 0x%llx -> "
2578                                "0x%llx)\n",
2579                                dev->name, print_mac(mac, sta->addr),
2580                                (unsigned long long) prev_rates,
2581                                (unsigned long long) supp_rates,
2582                                (unsigned long long) sta->supp_rates[rx_status->band]);
2583                 }
2584         }
2585
2586         rcu_read_unlock();
2587
2588         if (elems.ds_params && elems.ds_params_len == 1)
2589                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2590         else
2591                 freq = rx_status->freq;
2592
2593         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2594
2595         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2596                 return;
2597
2598 #ifdef CONFIG_MAC80211_MESH
2599         if (elems.mesh_config)
2600                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2601                                 elems.mesh_id_len, elems.mesh_config, freq);
2602         else
2603 #endif
2604                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2605                                            elems.ssid, elems.ssid_len);
2606         if (!bss) {
2607 #ifdef CONFIG_MAC80211_MESH
2608                 if (elems.mesh_config)
2609                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2610                                 elems.mesh_id_len, elems.mesh_config,
2611                                 elems.mesh_config_len, freq);
2612                 else
2613 #endif
2614                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2615                                                    elems.ssid, elems.ssid_len);
2616                 if (!bss)
2617                         return;
2618         } else {
2619 #if 0
2620                 /* TODO: order by RSSI? */
2621                 spin_lock_bh(&local->sta_bss_lock);
2622                 list_move_tail(&bss->list, &local->sta_bss_list);
2623                 spin_unlock_bh(&local->sta_bss_lock);
2624 #endif
2625         }
2626
2627         /* save the ERP value so that it is available at association time */
2628         if (elems.erp_info && elems.erp_info_len >= 1) {
2629                 bss->erp_value = elems.erp_info[0];
2630                 bss->has_erp_value = 1;
2631         }
2632
2633         if (elems.ht_cap_elem &&
2634              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2635              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2636                 kfree(bss->ht_ie);
2637                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2638                 if (bss->ht_ie) {
2639                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2640                                 elems.ht_cap_elem_len + 2);
2641                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2642                 } else
2643                         bss->ht_ie_len = 0;
2644         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2645                 kfree(bss->ht_ie);
2646                 bss->ht_ie = NULL;
2647                 bss->ht_ie_len = 0;
2648         }
2649
2650         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2651         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2652
2653         bss->supp_rates_len = 0;
2654         if (elems.supp_rates) {
2655                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2656                 if (clen > elems.supp_rates_len)
2657                         clen = elems.supp_rates_len;
2658                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2659                        clen);
2660                 bss->supp_rates_len += clen;
2661         }
2662         if (elems.ext_supp_rates) {
2663                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2664                 if (clen > elems.ext_supp_rates_len)
2665                         clen = elems.ext_supp_rates_len;
2666                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2667                        elems.ext_supp_rates, clen);
2668                 bss->supp_rates_len += clen;
2669         }
2670
2671         bss->band = rx_status->band;
2672
2673         bss->timestamp = beacon_timestamp;
2674         bss->last_update = jiffies;
2675         bss->signal = rx_status->signal;
2676         bss->noise = rx_status->noise;
2677         bss->qual = rx_status->qual;
2678         if (!beacon && !bss->probe_resp)
2679                 bss->probe_resp = true;
2680
2681         /*
2682          * In STA mode, the remaining parameters should not be overridden
2683          * by beacons because they're not necessarily accurate there.
2684          */
2685         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2686             bss->probe_resp && beacon) {
2687                 ieee80211_rx_bss_put(dev, bss);
2688                 return;
2689         }
2690
2691         if (elems.wpa &&
2692             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2693              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2694                 kfree(bss->wpa_ie);
2695                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2696                 if (bss->wpa_ie) {
2697                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2698                         bss->wpa_ie_len = elems.wpa_len + 2;
2699                 } else
2700                         bss->wpa_ie_len = 0;
2701         } else if (!elems.wpa && bss->wpa_ie) {
2702                 kfree(bss->wpa_ie);
2703                 bss->wpa_ie = NULL;
2704                 bss->wpa_ie_len = 0;
2705         }
2706
2707         if (elems.rsn &&
2708             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2709              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2710                 kfree(bss->rsn_ie);
2711                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2712                 if (bss->rsn_ie) {
2713                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2714                         bss->rsn_ie_len = elems.rsn_len + 2;
2715                 } else
2716                         bss->rsn_ie_len = 0;
2717         } else if (!elems.rsn && bss->rsn_ie) {
2718                 kfree(bss->rsn_ie);
2719                 bss->rsn_ie = NULL;
2720                 bss->rsn_ie_len = 0;
2721         }
2722
2723         /*
2724          * Cf.
2725          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2726          *
2727          * quoting:
2728          *
2729          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2730          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2731          * Alliance (September 1, 2004) is incorporated by reference herein.
2732          * The inclusion of the WMM Parameters in probe responses and
2733          * association responses is mandatory for WMM enabled networks. The
2734          * inclusion of the WMM Parameters in beacons, however, is optional.
2735          */
2736
2737         if (elems.wmm_param &&
2738             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2739              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2740                 kfree(bss->wmm_ie);
2741                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2742                 if (bss->wmm_ie) {
2743                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2744                                elems.wmm_param_len + 2);
2745                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2746                 } else
2747                         bss->wmm_ie_len = 0;
2748         } else if (elems.wmm_info &&
2749                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2750                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2751                  /* As for certain AP's Fifth bit is not set in WMM IE in
2752                   * beacon frames.So while parsing the beacon frame the
2753                   * wmm_info structure is used instead of wmm_param.
2754                   * wmm_info structure was never used to set bss->wmm_ie.
2755                   * This code fixes this problem by copying the WME
2756                   * information from wmm_info to bss->wmm_ie and enabling
2757                   * n-band association.
2758                   */
2759                 kfree(bss->wmm_ie);
2760                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2761                 if (bss->wmm_ie) {
2762                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2763                                elems.wmm_info_len + 2);
2764                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2765                 } else
2766                         bss->wmm_ie_len = 0;
2767         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2768                 kfree(bss->wmm_ie);
2769                 bss->wmm_ie = NULL;
2770                 bss->wmm_ie_len = 0;
2771         }
2772
2773         /* check if we need to merge IBSS */
2774         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2775             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2776             bss->capability & WLAN_CAPABILITY_IBSS &&
2777             bss->freq == local->oper_channel->center_freq &&
2778             elems.ssid_len == sdata->u.sta.ssid_len &&
2779             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2780                 if (rx_status->flag & RX_FLAG_TSFT) {
2781                         /* in order for correct IBSS merging we need mactime
2782                          *
2783                          * since mactime is defined as the time the first data
2784                          * symbol of the frame hits the PHY, and the timestamp
2785                          * of the beacon is defined as "the time that the data
2786                          * symbol containing the first bit of the timestamp is
2787                          * transmitted to the PHY plus the transmitting STA’s
2788                          * delays through its local PHY from the MAC-PHY
2789                          * interface to its interface with the WM"
2790                          * (802.11 11.1.2) - equals the time this bit arrives at
2791                          * the receiver - we have to take into account the
2792                          * offset between the two.
2793                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2794                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2795                          */
2796                         int rate = local->hw.wiphy->bands[rx_status->band]->
2797                                         bitrates[rx_status->rate_idx].bitrate;
2798                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2799                 } else if (local && local->ops && local->ops->get_tsf)
2800                         /* second best option: get current TSF */
2801                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2802                 else
2803                         /* can't merge without knowing the TSF */
2804                         rx_timestamp = -1LLU;
2805 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2806                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2807                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2808                        print_mac(mac, mgmt->sa),
2809                        print_mac(mac2, mgmt->bssid),
2810                        (unsigned long long)rx_timestamp,
2811                        (unsigned long long)beacon_timestamp,
2812                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2813                        jiffies);
2814 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2815                 if (beacon_timestamp > rx_timestamp) {
2816 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2817                         if (net_ratelimit())
2818 #endif
2819                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2820                                        "local TSF - IBSS merge with BSSID %s\n",
2821                                        dev->name, print_mac(mac, mgmt->bssid));
2822                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2823                         ieee80211_ibss_add_sta(dev, NULL,
2824                                                mgmt->bssid, mgmt->sa);
2825                 }
2826         }
2827
2828         ieee80211_rx_bss_put(dev, bss);
2829 }
2830
2831
2832 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2833                                          struct ieee80211_mgmt *mgmt,
2834                                          size_t len,
2835                                          struct ieee80211_rx_status *rx_status)
2836 {
2837         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2838 }
2839
2840
2841 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2842                                      struct ieee80211_mgmt *mgmt,
2843                                      size_t len,
2844                                      struct ieee80211_rx_status *rx_status)
2845 {
2846         struct ieee80211_sub_if_data *sdata;
2847         struct ieee80211_if_sta *ifsta;
2848         size_t baselen;
2849         struct ieee802_11_elems elems;
2850         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2851         struct ieee80211_conf *conf = &local->hw.conf;
2852         u32 changed = 0;
2853
2854         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2855
2856         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2857         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2858                 return;
2859         ifsta = &sdata->u.sta;
2860
2861         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2862             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2863                 return;
2864
2865         /* Process beacon from the current BSS */
2866         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2867         if (baselen > len)
2868                 return;
2869
2870         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2871
2872         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2873                                  elems.wmm_param_len);
2874
2875         /* Do not send changes to driver if we are scanning. This removes
2876          * requirement that driver's bss_info_changed function needs to be
2877          * atomic. */
2878         if (local->sta_sw_scanning || local->sta_hw_scanning)
2879                 return;
2880
2881         if (elems.erp_info && elems.erp_info_len >= 1)
2882                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2883         else {
2884                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2885                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2886                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2887         }
2888
2889         if (elems.ht_cap_elem && elems.ht_info_elem &&
2890             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2891                 struct ieee80211_ht_bss_info bss_info;
2892
2893                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2894                                 (struct ieee80211_ht_addt_info *)
2895                                 elems.ht_info_elem, &bss_info);
2896                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2897                                                &bss_info);
2898         }
2899
2900         ieee80211_bss_info_change_notify(sdata, changed);
2901 }
2902
2903
2904 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2905                                         struct ieee80211_if_sta *ifsta,
2906                                         struct ieee80211_mgmt *mgmt,
2907                                         size_t len,
2908                                         struct ieee80211_rx_status *rx_status)
2909 {
2910         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2911         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2912         int tx_last_beacon;
2913         struct sk_buff *skb;
2914         struct ieee80211_mgmt *resp;
2915         u8 *pos, *end;
2916         DECLARE_MAC_BUF(mac);
2917 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2918         DECLARE_MAC_BUF(mac2);
2919         DECLARE_MAC_BUF(mac3);
2920 #endif
2921
2922         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2923             ifsta->state != IEEE80211_IBSS_JOINED ||
2924             len < 24 + 2 || !ifsta->probe_resp)
2925                 return;
2926
2927         if (local->ops->tx_last_beacon)
2928                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2929         else
2930                 tx_last_beacon = 1;
2931
2932 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2933         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2934                "%s (tx_last_beacon=%d)\n",
2935                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2936                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2937 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2938
2939         if (!tx_last_beacon)
2940                 return;
2941
2942         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2943             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2944                 return;
2945
2946         end = ((u8 *) mgmt) + len;
2947         pos = mgmt->u.probe_req.variable;
2948         if (pos[0] != WLAN_EID_SSID ||
2949             pos + 2 + pos[1] > end) {
2950                 if (net_ratelimit()) {
2951                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2952                                "from %s\n",
2953                                dev->name, print_mac(mac, mgmt->sa));
2954                 }
2955                 return;
2956         }
2957         if (pos[1] != 0 &&
2958             (pos[1] != ifsta->ssid_len ||
2959              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2960                 /* Ignore ProbeReq for foreign SSID */
2961                 return;
2962         }
2963
2964         /* Reply with ProbeResp */
2965         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2966         if (!skb)
2967                 return;
2968
2969         resp = (struct ieee80211_mgmt *) skb->data;
2970         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2971 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2972         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2973                dev->name, print_mac(mac, resp->da));
2974 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2975         ieee80211_sta_tx(dev, skb, 0);
2976 }
2977
2978 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2979                                      struct ieee80211_if_sta *ifsta,
2980                                      struct ieee80211_mgmt *mgmt,
2981                                      size_t len,
2982                                      struct ieee80211_rx_status *rx_status)
2983 {
2984         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2985
2986         if (len < IEEE80211_MIN_ACTION_SIZE)
2987                 return;
2988
2989         switch (mgmt->u.action.category) {
2990         case WLAN_CATEGORY_BACK:
2991                 switch (mgmt->u.action.u.addba_req.action_code) {
2992                 case WLAN_ACTION_ADDBA_REQ:
2993                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2994                                    sizeof(mgmt->u.action.u.addba_req)))
2995                                 break;
2996                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2997                         break;
2998                 case WLAN_ACTION_ADDBA_RESP:
2999                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3000                                    sizeof(mgmt->u.action.u.addba_resp)))
3001                                 break;
3002                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3003                         break;
3004                 case WLAN_ACTION_DELBA:
3005                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3006                                    sizeof(mgmt->u.action.u.delba)))
3007                                 break;
3008                         ieee80211_sta_process_delba(dev, mgmt, len);
3009                         break;
3010                 default:
3011                         if (net_ratelimit())
3012                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3013                                         dev->name);
3014                         break;
3015                 }
3016                 break;
3017         case PLINK_CATEGORY:
3018                 if (ieee80211_vif_is_mesh(&sdata->vif))
3019                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3020                 break;
3021         case MESH_PATH_SEL_CATEGORY:
3022                 if (ieee80211_vif_is_mesh(&sdata->vif))
3023                         mesh_rx_path_sel_frame(dev, mgmt, len);
3024                 break;
3025         default:
3026                 if (net_ratelimit())
3027                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
3028                         "category=%d\n", dev->name, mgmt->u.action.category);
3029                 break;
3030         }
3031 }
3032
3033 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3034                            struct ieee80211_rx_status *rx_status)
3035 {
3036         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3037         struct ieee80211_sub_if_data *sdata;
3038         struct ieee80211_if_sta *ifsta;
3039         struct ieee80211_mgmt *mgmt;
3040         u16 fc;
3041
3042         if (skb->len < 24)
3043                 goto fail;
3044
3045         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3046         ifsta = &sdata->u.sta;
3047
3048         mgmt = (struct ieee80211_mgmt *) skb->data;
3049         fc = le16_to_cpu(mgmt->frame_control);
3050
3051         switch (fc & IEEE80211_FCTL_STYPE) {
3052         case IEEE80211_STYPE_PROBE_REQ:
3053         case IEEE80211_STYPE_PROBE_RESP:
3054         case IEEE80211_STYPE_BEACON:
3055         case IEEE80211_STYPE_ACTION:
3056                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3057         case IEEE80211_STYPE_AUTH:
3058         case IEEE80211_STYPE_ASSOC_RESP:
3059         case IEEE80211_STYPE_REASSOC_RESP:
3060         case IEEE80211_STYPE_DEAUTH:
3061         case IEEE80211_STYPE_DISASSOC:
3062                 skb_queue_tail(&ifsta->skb_queue, skb);
3063                 queue_work(local->hw.workqueue, &ifsta->work);
3064                 return;
3065         default:
3066                 printk(KERN_DEBUG "%s: received unknown management frame - "
3067                        "stype=%d\n", dev->name,
3068                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3069                 break;
3070         }
3071
3072  fail:
3073         kfree_skb(skb);
3074 }
3075
3076
3077 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3078                                          struct sk_buff *skb)
3079 {
3080         struct ieee80211_rx_status *rx_status;
3081         struct ieee80211_sub_if_data *sdata;
3082         struct ieee80211_if_sta *ifsta;
3083         struct ieee80211_mgmt *mgmt;
3084         u16 fc;
3085
3086         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3087         ifsta = &sdata->u.sta;
3088
3089         rx_status = (struct ieee80211_rx_status *) skb->cb;
3090         mgmt = (struct ieee80211_mgmt *) skb->data;
3091         fc = le16_to_cpu(mgmt->frame_control);
3092
3093         switch (fc & IEEE80211_FCTL_STYPE) {
3094         case IEEE80211_STYPE_PROBE_REQ:
3095                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3096                                             rx_status);
3097                 break;
3098         case IEEE80211_STYPE_PROBE_RESP:
3099                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3100                 break;
3101         case IEEE80211_STYPE_BEACON:
3102                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3103                 break;
3104         case IEEE80211_STYPE_AUTH:
3105                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3106                 break;
3107         case IEEE80211_STYPE_ASSOC_RESP:
3108                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3109                 break;
3110         case IEEE80211_STYPE_REASSOC_RESP:
3111                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3112                 break;
3113         case IEEE80211_STYPE_DEAUTH:
3114                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3115                 break;
3116         case IEEE80211_STYPE_DISASSOC:
3117                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3118                 break;
3119         case IEEE80211_STYPE_ACTION:
3120                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3121                 break;
3122         }
3123
3124         kfree_skb(skb);
3125 }
3126
3127
3128 ieee80211_rx_result
3129 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3130                       struct ieee80211_rx_status *rx_status)
3131 {
3132         struct ieee80211_mgmt *mgmt;
3133         u16 fc;
3134
3135         if (skb->len < 2)
3136                 return RX_DROP_UNUSABLE;
3137
3138         mgmt = (struct ieee80211_mgmt *) skb->data;
3139         fc = le16_to_cpu(mgmt->frame_control);
3140
3141         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3142                 return RX_CONTINUE;
3143
3144         if (skb->len < 24)
3145                 return RX_DROP_MONITOR;
3146
3147         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3148                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3149                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3150                                                      skb->len, rx_status);
3151                         dev_kfree_skb(skb);
3152                         return RX_QUEUED;
3153                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3154                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3155                                                  rx_status);
3156                         dev_kfree_skb(skb);
3157                         return RX_QUEUED;
3158                 }
3159         }
3160         return RX_CONTINUE;
3161 }
3162
3163
3164 static int ieee80211_sta_active_ibss(struct net_device *dev)
3165 {
3166         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3167         int active = 0;
3168         struct sta_info *sta;
3169         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3170
3171         rcu_read_lock();
3172
3173         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3174                 if (sta->sdata == sdata &&
3175                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3176                                jiffies)) {
3177                         active++;
3178                         break;
3179                 }
3180         }
3181
3182         rcu_read_unlock();
3183
3184         return active;
3185 }
3186
3187
3188 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3189 {
3190         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3191         struct sta_info *sta, *tmp;
3192         LIST_HEAD(tmp_list);
3193         DECLARE_MAC_BUF(mac);
3194         unsigned long flags;
3195
3196         spin_lock_irqsave(&local->sta_lock, flags);
3197         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3198                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3199                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3200                                dev->name, print_mac(mac, sta->addr));
3201                         __sta_info_unlink(&sta);
3202                         if (sta)
3203                                 list_add(&sta->list, &tmp_list);
3204                 }
3205         spin_unlock_irqrestore(&local->sta_lock, flags);
3206
3207         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3208                 sta_info_destroy(sta);
3209 }
3210
3211
3212 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3213                                      struct ieee80211_if_sta *ifsta)
3214 {
3215         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3216
3217         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3218         if (ieee80211_sta_active_ibss(dev))
3219                 return;
3220
3221         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3222                "IBSS networks with same SSID (merge)\n", dev->name);
3223         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3224 }
3225
3226
3227 #ifdef CONFIG_MAC80211_MESH
3228 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3229                            struct ieee80211_if_sta *ifsta)
3230 {
3231         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3232         bool free_plinks;
3233
3234         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3235         mesh_path_expire(dev);
3236
3237         free_plinks = mesh_plink_availables(sdata);
3238         if (free_plinks != sdata->u.sta.accepting_plinks)
3239                 ieee80211_if_config_beacon(dev);
3240
3241         mod_timer(&ifsta->timer, jiffies +
3242                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3243 }
3244
3245
3246 void ieee80211_start_mesh(struct net_device *dev)
3247 {
3248         struct ieee80211_if_sta *ifsta;
3249         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3250         ifsta = &sdata->u.sta;
3251         ifsta->state = IEEE80211_MESH_UP;
3252         ieee80211_sta_timer((unsigned long)sdata);
3253 }
3254 #endif
3255
3256
3257 void ieee80211_sta_timer(unsigned long data)
3258 {
3259         struct ieee80211_sub_if_data *sdata =
3260                 (struct ieee80211_sub_if_data *) data;
3261         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3262         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3263
3264         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3265         queue_work(local->hw.workqueue, &ifsta->work);
3266 }
3267
3268 void ieee80211_sta_work(struct work_struct *work)
3269 {
3270         struct ieee80211_sub_if_data *sdata =
3271                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3272         struct net_device *dev = sdata->dev;
3273         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3274         struct ieee80211_if_sta *ifsta;
3275         struct sk_buff *skb;
3276
3277         if (!netif_running(dev))
3278                 return;
3279
3280         if (local->sta_sw_scanning || local->sta_hw_scanning)
3281                 return;
3282
3283         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3284             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3285             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3286                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3287                        "(type=%d)\n", dev->name, sdata->vif.type);
3288                 return;
3289         }
3290         ifsta = &sdata->u.sta;
3291
3292         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3293                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3294
3295 #ifdef CONFIG_MAC80211_MESH
3296         if (ifsta->preq_queue_len &&
3297             time_after(jiffies,
3298                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3299                 mesh_path_start_discovery(dev);
3300 #endif
3301
3302         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3303             ifsta->state != IEEE80211_ASSOCIATE &&
3304             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3305                 if (ifsta->scan_ssid_len)
3306                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3307                 else
3308                         ieee80211_sta_start_scan(dev, NULL, 0);
3309                 return;
3310         }
3311
3312         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3313                 if (ieee80211_sta_config_auth(dev, ifsta))
3314                         return;
3315                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3316         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3317                 return;
3318
3319         switch (ifsta->state) {
3320         case IEEE80211_DISABLED:
3321                 break;
3322         case IEEE80211_AUTHENTICATE:
3323                 ieee80211_authenticate(dev, ifsta);
3324                 break;
3325         case IEEE80211_ASSOCIATE:
3326                 ieee80211_associate(dev, ifsta);
3327                 break;
3328         case IEEE80211_ASSOCIATED:
3329                 ieee80211_associated(dev, ifsta);
3330                 break;
3331         case IEEE80211_IBSS_SEARCH:
3332                 ieee80211_sta_find_ibss(dev, ifsta);
3333                 break;
3334         case IEEE80211_IBSS_JOINED:
3335                 ieee80211_sta_merge_ibss(dev, ifsta);
3336                 break;
3337 #ifdef CONFIG_MAC80211_MESH
3338         case IEEE80211_MESH_UP:
3339                 ieee80211_mesh_housekeeping(dev, ifsta);
3340                 break;
3341 #endif
3342         default:
3343                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3344                        ifsta->state);
3345                 break;
3346         }
3347
3348         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3349                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3350                        "mixed-cell disabled - disassociate\n", dev->name);
3351
3352                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3353                 ieee80211_set_disassoc(dev, ifsta, 0);
3354         }
3355 }
3356
3357
3358 static void ieee80211_sta_reset_auth(struct net_device *dev,
3359                                      struct ieee80211_if_sta *ifsta)
3360 {
3361         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3362
3363         if (local->ops->reset_tsf) {
3364                 /* Reset own TSF to allow time synchronization work. */
3365                 local->ops->reset_tsf(local_to_hw(local));
3366         }
3367
3368         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3369
3370
3371         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3372                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3373         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3374                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3375         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3376                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3377         else
3378                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3379         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3380                ifsta->auth_alg);
3381         ifsta->auth_transaction = -1;
3382         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3383         ifsta->auth_tries = ifsta->assoc_tries = 0;
3384         netif_carrier_off(dev);
3385 }
3386
3387
3388 void ieee80211_sta_req_auth(struct net_device *dev,
3389                             struct ieee80211_if_sta *ifsta)
3390 {
3391         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3392         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3393
3394         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3395                 return;
3396
3397         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3398                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3399             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3400                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3401                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3402                 queue_work(local->hw.workqueue, &ifsta->work);
3403         }
3404 }
3405
3406 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3407                                     const char *ssid, int ssid_len)
3408 {
3409         int tmp, hidden_ssid;
3410
3411         if (ssid_len == ifsta->ssid_len &&
3412             !memcmp(ifsta->ssid, ssid, ssid_len))
3413                 return 1;
3414
3415         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3416                 return 0;
3417
3418         hidden_ssid = 1;
3419         tmp = ssid_len;
3420         while (tmp--) {
3421                 if (ssid[tmp] != '\0') {
3422                         hidden_ssid = 0;
3423                         break;
3424                 }
3425         }
3426
3427         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3428                 return 1;
3429
3430         if (ssid_len == 1 && ssid[0] == ' ')
3431                 return 1;
3432
3433         return 0;
3434 }
3435
3436 static int ieee80211_sta_config_auth(struct net_device *dev,
3437                                      struct ieee80211_if_sta *ifsta)
3438 {
3439         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3440         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3441         struct ieee80211_sta_bss *bss, *selected = NULL;
3442         int top_rssi = 0, freq;
3443
3444         spin_lock_bh(&local->sta_bss_lock);
3445         freq = local->oper_channel->center_freq;
3446         list_for_each_entry(bss, &local->sta_bss_list, list) {
3447                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3448                         continue;
3449
3450                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3451                         IEEE80211_STA_AUTO_BSSID_SEL |
3452                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3453                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3454                      !!sdata->default_key))
3455                         continue;
3456
3457                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3458                     bss->freq != freq)
3459                         continue;
3460
3461                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3462                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3463                         continue;
3464
3465                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3466                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3467                         continue;
3468
3469                 if (!selected || top_rssi < bss->signal) {
3470                         selected = bss;
3471                         top_rssi = bss->signal;
3472                 }
3473         }
3474         if (selected)
3475                 atomic_inc(&selected->users);
3476         spin_unlock_bh(&local->sta_bss_lock);
3477
3478         if (selected) {
3479                 ieee80211_set_freq(local, selected->freq);
3480                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3481                         ieee80211_sta_set_ssid(dev, selected->ssid,
3482                                                selected->ssid_len);
3483                 ieee80211_sta_set_bssid(dev, selected->bssid);
3484                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3485                 ieee80211_rx_bss_put(dev, selected);
3486                 ifsta->state = IEEE80211_AUTHENTICATE;
3487                 ieee80211_sta_reset_auth(dev, ifsta);
3488                 return 0;
3489         } else {
3490                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3491                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3492                                 ieee80211_sta_start_scan(dev, NULL, 0);
3493                         else
3494                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3495                                                          ifsta->ssid_len);
3496                         ifsta->state = IEEE80211_AUTHENTICATE;
3497                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3498                 } else
3499                         ifsta->state = IEEE80211_DISABLED;
3500         }
3501         return -1;
3502 }
3503
3504
3505 static int ieee80211_sta_create_ibss(struct net_device *dev,
3506                                      struct ieee80211_if_sta *ifsta)
3507 {
3508         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3509         struct ieee80211_sta_bss *bss;
3510         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3511         struct ieee80211_supported_band *sband;
3512         u8 bssid[ETH_ALEN], *pos;
3513         int i;
3514         DECLARE_MAC_BUF(mac);
3515
3516 #if 0
3517         /* Easier testing, use fixed BSSID. */
3518         memset(bssid, 0xfe, ETH_ALEN);
3519 #else
3520         /* Generate random, not broadcast, locally administered BSSID. Mix in
3521          * own MAC address to make sure that devices that do not have proper
3522          * random number generator get different BSSID. */
3523         get_random_bytes(bssid, ETH_ALEN);
3524         for (i = 0; i < ETH_ALEN; i++)
3525                 bssid[i] ^= dev->dev_addr[i];
3526         bssid[0] &= ~0x01;
3527         bssid[0] |= 0x02;
3528 #endif
3529
3530         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3531                dev->name, print_mac(mac, bssid));
3532
3533         bss = ieee80211_rx_bss_add(dev, bssid,
3534                                    local->hw.conf.channel->center_freq,
3535                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3536         if (!bss)
3537                 return -ENOMEM;
3538
3539         bss->band = local->hw.conf.channel->band;
3540         sband = local->hw.wiphy->bands[bss->band];
3541
3542         if (local->hw.conf.beacon_int == 0)
3543                 local->hw.conf.beacon_int = 10000;
3544         bss->beacon_int = local->hw.conf.beacon_int;
3545         bss->last_update = jiffies;
3546         bss->capability = WLAN_CAPABILITY_IBSS;
3547
3548         if (sdata->default_key)
3549                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3550         else
3551                 sdata->drop_unencrypted = 0;
3552
3553         bss->supp_rates_len = sband->n_bitrates;
3554         pos = bss->supp_rates;
3555         for (i = 0; i < sband->n_bitrates; i++) {
3556                 int rate = sband->bitrates[i].bitrate;
3557                 *pos++ = (u8) (rate / 5);
3558         }
3559
3560         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3561 }
3562
3563
3564 static int ieee80211_sta_find_ibss(struct net_device *dev,
3565                                    struct ieee80211_if_sta *ifsta)
3566 {
3567         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3568         struct ieee80211_sta_bss *bss;
3569         int found = 0;
3570         u8 bssid[ETH_ALEN];
3571         int active_ibss;
3572         DECLARE_MAC_BUF(mac);
3573         DECLARE_MAC_BUF(mac2);
3574
3575         if (ifsta->ssid_len == 0)
3576                 return -EINVAL;
3577
3578         active_ibss = ieee80211_sta_active_ibss(dev);
3579 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3580         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3581                dev->name, active_ibss);
3582 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3583         spin_lock_bh(&local->sta_bss_lock);
3584         list_for_each_entry(bss, &local->sta_bss_list, list) {
3585                 if (ifsta->ssid_len != bss->ssid_len ||
3586                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3587                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3588                         continue;
3589 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3590                 printk(KERN_DEBUG "   bssid=%s found\n",
3591                        print_mac(mac, bss->bssid));
3592 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3593                 memcpy(bssid, bss->bssid, ETH_ALEN);
3594                 found = 1;
3595                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3596                         break;
3597         }
3598         spin_unlock_bh(&local->sta_bss_lock);
3599
3600 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3601         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3602                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3603 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3604         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3605             (bss = ieee80211_rx_bss_get(dev, bssid,
3606                                         local->hw.conf.channel->center_freq,
3607                                         ifsta->ssid, ifsta->ssid_len))) {
3608                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3609                        " based on configured SSID\n",
3610                        dev->name, print_mac(mac, bssid));
3611                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3612         }
3613 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3614         printk(KERN_DEBUG "   did not try to join ibss\n");
3615 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3616
3617         /* Selected IBSS not found in current scan results - try to scan */
3618         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3619             !ieee80211_sta_active_ibss(dev)) {
3620                 mod_timer(&ifsta->timer, jiffies +
3621                                       IEEE80211_IBSS_MERGE_INTERVAL);
3622         } else if (time_after(jiffies, local->last_scan_completed +
3623                               IEEE80211_SCAN_INTERVAL)) {
3624                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3625                        "join\n", dev->name);
3626                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3627                                               ifsta->ssid_len);
3628         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3629                 int interval = IEEE80211_SCAN_INTERVAL;
3630
3631                 if (time_after(jiffies, ifsta->ibss_join_req +
3632                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3633                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3634                             (!(local->oper_channel->flags &
3635                                         IEEE80211_CHAN_NO_IBSS)))
3636                                 return ieee80211_sta_create_ibss(dev, ifsta);
3637                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3638                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3639                                        " %d MHz\n", dev->name,
3640                                        local->hw.conf.channel->center_freq);
3641                         }
3642
3643                         /* No IBSS found - decrease scan interval and continue
3644                          * scanning. */
3645                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3646                 }
3647
3648                 ifsta->state = IEEE80211_IBSS_SEARCH;
3649                 mod_timer(&ifsta->timer, jiffies + interval);
3650                 return 0;
3651         }
3652
3653         return 0;
3654 }
3655
3656
3657 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3658 {
3659         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3660         struct ieee80211_if_sta *ifsta;
3661
3662         if (len > IEEE80211_MAX_SSID_LEN)
3663                 return -EINVAL;
3664
3665         ifsta = &sdata->u.sta;
3666
3667         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3668                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3669         memcpy(ifsta->ssid, ssid, len);
3670         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3671         ifsta->ssid_len = len;
3672
3673         if (len)
3674                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3675         else
3676                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3677         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3678             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3679                 ifsta->ibss_join_req = jiffies;
3680                 ifsta->state = IEEE80211_IBSS_SEARCH;
3681                 return ieee80211_sta_find_ibss(dev, ifsta);
3682         }
3683         return 0;
3684 }
3685
3686
3687 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3688 {
3689         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3690         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3691         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3692         *len = ifsta->ssid_len;
3693         return 0;
3694 }
3695
3696
3697 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3698 {
3699         struct ieee80211_sub_if_data *sdata;
3700         struct ieee80211_if_sta *ifsta;
3701         int res;
3702
3703         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3704         ifsta = &sdata->u.sta;
3705
3706         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3707                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3708                 res = ieee80211_if_config(dev);
3709                 if (res) {
3710                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3711                                "the low-level driver\n", dev->name);
3712                         return res;
3713                 }
3714         }
3715
3716         if (is_valid_ether_addr(bssid))
3717                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3718         else
3719                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3720
3721         return 0;
3722 }
3723
3724
3725 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3726                                     struct ieee80211_sub_if_data *sdata,
3727                                     int powersave)
3728 {
3729         struct sk_buff *skb;
3730         struct ieee80211_hdr *nullfunc;
3731         u16 fc;
3732
3733         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3734         if (!skb) {
3735                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3736                        "frame\n", sdata->dev->name);
3737                 return;
3738         }
3739         skb_reserve(skb, local->hw.extra_tx_headroom);
3740
3741         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3742         memset(nullfunc, 0, 24);
3743         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3744              IEEE80211_FCTL_TODS;
3745         if (powersave)
3746                 fc |= IEEE80211_FCTL_PM;
3747         nullfunc->frame_control = cpu_to_le16(fc);
3748         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3749         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3750         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3751
3752         ieee80211_sta_tx(sdata->dev, skb, 0);
3753 }
3754
3755
3756 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3757 {
3758         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3759             ieee80211_vif_is_mesh(&sdata->vif))
3760                 ieee80211_sta_timer((unsigned long)sdata);
3761 }
3762
3763 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3764 {
3765         struct ieee80211_local *local = hw_to_local(hw);
3766         struct net_device *dev = local->scan_dev;
3767         struct ieee80211_sub_if_data *sdata;
3768         union iwreq_data wrqu;
3769
3770         local->last_scan_completed = jiffies;
3771         memset(&wrqu, 0, sizeof(wrqu));
3772         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3773
3774         if (local->sta_hw_scanning) {
3775                 local->sta_hw_scanning = 0;
3776                 if (ieee80211_hw_config(local))
3777                         printk(KERN_DEBUG "%s: failed to restore operational "
3778                                "channel after scan\n", dev->name);
3779                 /* Restart STA timer for HW scan case */
3780                 rcu_read_lock();
3781                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3782                         ieee80211_restart_sta_timer(sdata);
3783                 rcu_read_unlock();
3784
3785                 goto done;
3786         }
3787
3788         local->sta_sw_scanning = 0;
3789         if (ieee80211_hw_config(local))
3790                 printk(KERN_DEBUG "%s: failed to restore operational "
3791                        "channel after scan\n", dev->name);
3792
3793
3794         netif_tx_lock_bh(local->mdev);
3795         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3796         local->ops->configure_filter(local_to_hw(local),
3797                                      FIF_BCN_PRBRESP_PROMISC,
3798                                      &local->filter_flags,
3799                                      local->mdev->mc_count,
3800                                      local->mdev->mc_list);
3801
3802         netif_tx_unlock_bh(local->mdev);
3803
3804         rcu_read_lock();
3805         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3806
3807                 /* No need to wake the master device. */
3808                 if (sdata->dev == local->mdev)
3809                         continue;
3810
3811                 /* Tell AP we're back */
3812                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3813                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3814                         ieee80211_send_nullfunc(local, sdata, 0);
3815
3816                 ieee80211_restart_sta_timer(sdata);
3817
3818                 netif_wake_queue(sdata->dev);
3819         }
3820         rcu_read_unlock();
3821
3822 done:
3823         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3824         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3825                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3826                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3827                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3828                     !ieee80211_sta_active_ibss(dev)))
3829                         ieee80211_sta_find_ibss(dev, ifsta);
3830         }
3831 }
3832 EXPORT_SYMBOL(ieee80211_scan_completed);
3833
3834 void ieee80211_sta_scan_work(struct work_struct *work)
3835 {
3836         struct ieee80211_local *local =
3837                 container_of(work, struct ieee80211_local, scan_work.work);
3838         struct net_device *dev = local->scan_dev;
3839         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3840         struct ieee80211_supported_band *sband;
3841         struct ieee80211_channel *chan;
3842         int skip;
3843         unsigned long next_delay = 0;
3844
3845         if (!local->sta_sw_scanning)
3846                 return;
3847
3848         switch (local->scan_state) {
3849         case SCAN_SET_CHANNEL:
3850                 /*
3851                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3852                  * after we successfully scanned the last channel of the last
3853                  * band (and the last band is supported by the hw)
3854                  */
3855                 if (local->scan_band < IEEE80211_NUM_BANDS)
3856                         sband = local->hw.wiphy->bands[local->scan_band];
3857                 else
3858                         sband = NULL;
3859
3860                 /*
3861                  * If we are at an unsupported band and have more bands
3862                  * left to scan, advance to the next supported one.
3863                  */
3864                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3865                         local->scan_band++;
3866                         sband = local->hw.wiphy->bands[local->scan_band];
3867                         local->scan_channel_idx = 0;
3868                 }
3869
3870                 /* if no more bands/channels left, complete scan */
3871                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3872                         ieee80211_scan_completed(local_to_hw(local));
3873                         return;
3874                 }
3875                 skip = 0;
3876                 chan = &sband->channels[local->scan_channel_idx];
3877
3878                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3879                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3880                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3881                         skip = 1;
3882
3883                 if (!skip) {
3884                         local->scan_channel = chan;
3885                         if (ieee80211_hw_config(local)) {
3886                                 printk(KERN_DEBUG "%s: failed to set freq to "
3887                                        "%d MHz for scan\n", dev->name,
3888                                        chan->center_freq);
3889                                 skip = 1;
3890                         }
3891                 }
3892
3893                 /* advance state machine to next channel/band */
3894                 local->scan_channel_idx++;
3895                 if (local->scan_channel_idx >= sband->n_channels) {
3896                         /*
3897                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3898                          * we'll catch that case above and complete the scan
3899                          * if that is the case.
3900                          */
3901                         local->scan_band++;
3902                         local->scan_channel_idx = 0;
3903                 }
3904
3905                 if (skip)
3906                         break;
3907
3908                 next_delay = IEEE80211_PROBE_DELAY +
3909                              usecs_to_jiffies(local->hw.channel_change_time);
3910                 local->scan_state = SCAN_SEND_PROBE;
3911                 break;
3912         case SCAN_SEND_PROBE:
3913                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3914                 local->scan_state = SCAN_SET_CHANNEL;
3915
3916                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3917                         break;
3918                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3919                                          local->scan_ssid_len);
3920                 next_delay = IEEE80211_CHANNEL_TIME;
3921                 break;
3922         }
3923
3924         if (local->sta_sw_scanning)
3925                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3926                                    next_delay);
3927 }
3928
3929
3930 static int ieee80211_sta_start_scan(struct net_device *dev,
3931                                     u8 *ssid, size_t ssid_len)
3932 {
3933         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3934         struct ieee80211_sub_if_data *sdata;
3935
3936         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3937                 return -EINVAL;
3938
3939         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3940          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3941          * BSSID: MACAddress
3942          * SSID
3943          * ScanType: ACTIVE, PASSIVE
3944          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3945          *    a Probe frame during active scanning
3946          * ChannelList
3947          * MinChannelTime (>= ProbeDelay), in TU
3948          * MaxChannelTime: (>= MinChannelTime), in TU
3949          */
3950
3951          /* MLME-SCAN.confirm
3952           * BSSDescriptionSet
3953           * ResultCode: SUCCESS, INVALID_PARAMETERS
3954          */
3955
3956         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3957                 if (local->scan_dev == dev)
3958                         return 0;
3959                 return -EBUSY;
3960         }
3961
3962         if (local->ops->hw_scan) {
3963                 int rc = local->ops->hw_scan(local_to_hw(local),
3964                                              ssid, ssid_len);
3965                 if (!rc) {
3966                         local->sta_hw_scanning = 1;
3967                         local->scan_dev = dev;
3968                 }
3969                 return rc;
3970         }
3971
3972         local->sta_sw_scanning = 1;
3973
3974         rcu_read_lock();
3975         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3976
3977                 /* Don't stop the master interface, otherwise we can't transmit
3978                  * probes! */
3979                 if (sdata->dev == local->mdev)
3980                         continue;
3981
3982                 netif_stop_queue(sdata->dev);
3983                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3984                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3985                         ieee80211_send_nullfunc(local, sdata, 1);
3986         }
3987         rcu_read_unlock();
3988
3989         if (ssid) {
3990                 local->scan_ssid_len = ssid_len;
3991                 memcpy(local->scan_ssid, ssid, ssid_len);
3992         } else
3993                 local->scan_ssid_len = 0;
3994         local->scan_state = SCAN_SET_CHANNEL;
3995         local->scan_channel_idx = 0;
3996         local->scan_band = IEEE80211_BAND_2GHZ;
3997         local->scan_dev = dev;
3998
3999         netif_tx_lock_bh(local->mdev);
4000         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4001         local->ops->configure_filter(local_to_hw(local),
4002                                      FIF_BCN_PRBRESP_PROMISC,
4003                                      &local->filter_flags,
4004                                      local->mdev->mc_count,
4005                                      local->mdev->mc_list);
4006         netif_tx_unlock_bh(local->mdev);
4007
4008         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4009         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4010                            IEEE80211_CHANNEL_TIME);
4011
4012         return 0;
4013 }
4014
4015
4016 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4017 {
4018         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4019         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4020         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4021
4022         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4023                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4024
4025         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4026                 if (local->scan_dev == dev)
4027                         return 0;
4028                 return -EBUSY;
4029         }
4030
4031         ifsta->scan_ssid_len = ssid_len;
4032         if (ssid_len)
4033                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4034         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4035         queue_work(local->hw.workqueue, &ifsta->work);
4036         return 0;
4037 }
4038
4039 static char *
4040 ieee80211_sta_scan_result(struct net_device *dev,
4041                           struct ieee80211_sta_bss *bss,
4042                           char *current_ev, char *end_buf)
4043 {
4044         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4045         struct iw_event iwe;
4046
4047         if (time_after(jiffies,
4048                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4049                 return current_ev;
4050
4051         memset(&iwe, 0, sizeof(iwe));
4052         iwe.cmd = SIOCGIWAP;
4053         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4054         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4055         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4056                                           IW_EV_ADDR_LEN);
4057
4058         memset(&iwe, 0, sizeof(iwe));
4059         iwe.cmd = SIOCGIWESSID;
4060         if (bss_mesh_cfg(bss)) {
4061                 iwe.u.data.length = bss_mesh_id_len(bss);
4062                 iwe.u.data.flags = 1;
4063                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4064                                                   bss_mesh_id(bss));
4065         } else {
4066                 iwe.u.data.length = bss->ssid_len;
4067                 iwe.u.data.flags = 1;
4068                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4069                                                   bss->ssid);
4070         }
4071
4072         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4073             || bss_mesh_cfg(bss)) {
4074                 memset(&iwe, 0, sizeof(iwe));
4075                 iwe.cmd = SIOCGIWMODE;
4076                 if (bss_mesh_cfg(bss))
4077                         iwe.u.mode = IW_MODE_MESH;
4078                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4079                         iwe.u.mode = IW_MODE_MASTER;
4080                 else
4081                         iwe.u.mode = IW_MODE_ADHOC;
4082                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4083                                                   IW_EV_UINT_LEN);
4084         }
4085
4086         memset(&iwe, 0, sizeof(iwe));
4087         iwe.cmd = SIOCGIWFREQ;
4088         iwe.u.freq.m = bss->freq;
4089         iwe.u.freq.e = 6;
4090         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4091                                           IW_EV_FREQ_LEN);
4092
4093         memset(&iwe, 0, sizeof(iwe));
4094         iwe.cmd = SIOCGIWFREQ;
4095         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4096         iwe.u.freq.e = 0;
4097         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4098                                           IW_EV_FREQ_LEN);
4099
4100         memset(&iwe, 0, sizeof(iwe));
4101         iwe.cmd = IWEVQUAL;
4102         iwe.u.qual.qual = bss->qual;
4103         iwe.u.qual.level = bss->signal;
4104         iwe.u.qual.noise = bss->noise;
4105         iwe.u.qual.updated = local->wstats_flags;
4106         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4107                                           IW_EV_QUAL_LEN);
4108
4109         memset(&iwe, 0, sizeof(iwe));
4110         iwe.cmd = SIOCGIWENCODE;
4111         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4112                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4113         else
4114                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4115         iwe.u.data.length = 0;
4116         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4117
4118         if (bss && bss->wpa_ie) {
4119                 memset(&iwe, 0, sizeof(iwe));
4120                 iwe.cmd = IWEVGENIE;
4121                 iwe.u.data.length = bss->wpa_ie_len;
4122                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4123                                                   bss->wpa_ie);
4124         }
4125
4126         if (bss && bss->rsn_ie) {
4127                 memset(&iwe, 0, sizeof(iwe));
4128                 iwe.cmd = IWEVGENIE;
4129                 iwe.u.data.length = bss->rsn_ie_len;
4130                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4131                                                   bss->rsn_ie);
4132         }
4133
4134         if (bss && bss->supp_rates_len > 0) {
4135                 /* display all supported rates in readable format */
4136                 char *p = current_ev + IW_EV_LCP_LEN;
4137                 int i;
4138
4139                 memset(&iwe, 0, sizeof(iwe));
4140                 iwe.cmd = SIOCGIWRATE;
4141                 /* Those two flags are ignored... */
4142                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4143
4144                 for (i = 0; i < bss->supp_rates_len; i++) {
4145                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4146                                                         0x7f) * 500000);
4147                         p = iwe_stream_add_value(current_ev, p,
4148                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4149                 }
4150                 current_ev = p;
4151         }
4152
4153         if (bss) {
4154                 char *buf;
4155                 buf = kmalloc(30, GFP_ATOMIC);
4156                 if (buf) {
4157                         memset(&iwe, 0, sizeof(iwe));
4158                         iwe.cmd = IWEVCUSTOM;
4159                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4160                         iwe.u.data.length = strlen(buf);
4161                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4162                                                           &iwe, buf);
4163                         kfree(buf);
4164                 }
4165         }
4166
4167         if (bss_mesh_cfg(bss)) {
4168                 char *buf;
4169                 u8 *cfg = bss_mesh_cfg(bss);
4170                 buf = kmalloc(50, GFP_ATOMIC);
4171                 if (buf) {
4172                         memset(&iwe, 0, sizeof(iwe));
4173                         iwe.cmd = IWEVCUSTOM;
4174                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4175                         iwe.u.data.length = strlen(buf);
4176                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4177                                                           &iwe, buf);
4178                         sprintf(buf, "Path Selection Protocol ID: "
4179                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4180                                                         cfg[4]);
4181                         iwe.u.data.length = strlen(buf);
4182                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4183                                                           &iwe, buf);
4184                         sprintf(buf, "Path Selection Metric ID: "
4185                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4186                                                         cfg[8]);
4187                         iwe.u.data.length = strlen(buf);
4188                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4189                                                           &iwe, buf);
4190                         sprintf(buf, "Congestion Control Mode ID: "
4191                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4192                                                         cfg[11], cfg[12]);
4193                         iwe.u.data.length = strlen(buf);
4194                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4195                                                           &iwe, buf);
4196                         sprintf(buf, "Channel Precedence: "
4197                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4198                                                         cfg[15], cfg[16]);
4199                         iwe.u.data.length = strlen(buf);
4200                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4201                                                           &iwe, buf);
4202                         kfree(buf);
4203                 }
4204         }
4205
4206         return current_ev;
4207 }
4208
4209
4210 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4211 {
4212         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4213         char *current_ev = buf;
4214         char *end_buf = buf + len;
4215         struct ieee80211_sta_bss *bss;
4216
4217         spin_lock_bh(&local->sta_bss_lock);
4218         list_for_each_entry(bss, &local->sta_bss_list, list) {
4219                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4220                         spin_unlock_bh(&local->sta_bss_lock);
4221                         return -E2BIG;
4222                 }
4223                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4224                                                        end_buf);
4225         }
4226         spin_unlock_bh(&local->sta_bss_lock);
4227         return current_ev - buf;
4228 }
4229
4230
4231 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4232 {
4233         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4234         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4235
4236         kfree(ifsta->extra_ie);
4237         if (len == 0) {
4238                 ifsta->extra_ie = NULL;
4239                 ifsta->extra_ie_len = 0;
4240                 return 0;
4241         }
4242         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4243         if (!ifsta->extra_ie) {
4244                 ifsta->extra_ie_len = 0;
4245                 return -ENOMEM;
4246         }
4247         memcpy(ifsta->extra_ie, ie, len);
4248         ifsta->extra_ie_len = len;
4249         return 0;
4250 }
4251
4252
4253 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4254                                         struct sk_buff *skb, u8 *bssid,
4255                                         u8 *addr)
4256 {
4257         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4258         struct sta_info *sta;
4259         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4260         DECLARE_MAC_BUF(mac);
4261
4262         /* TODO: Could consider removing the least recently used entry and
4263          * allow new one to be added. */
4264         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4265                 if (net_ratelimit()) {
4266                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4267                                "entry %s\n", dev->name, print_mac(mac, addr));
4268                 }
4269                 return NULL;
4270         }
4271
4272         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4273                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4274
4275         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4276         if (!sta)
4277                 return NULL;
4278
4279         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4280
4281         sta->supp_rates[local->hw.conf.channel->band] =
4282                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4283
4284         rate_control_rate_init(sta, local);
4285
4286         if (sta_info_insert(sta))
4287                 return NULL;
4288
4289         return sta;
4290 }
4291
4292
4293 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4294 {
4295         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4296         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4297
4298         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4299                dev->name, reason);
4300
4301         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4302             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4303                 return -EINVAL;
4304
4305         ieee80211_send_deauth(dev, ifsta, reason);
4306         ieee80211_set_disassoc(dev, ifsta, 1);
4307         return 0;
4308 }
4309
4310
4311 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4312 {
4313         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4314         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4315
4316         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4317                dev->name, reason);
4318
4319         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4320                 return -EINVAL;
4321
4322         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4323                 return -1;
4324
4325         ieee80211_send_disassoc(dev, ifsta, reason);
4326         ieee80211_set_disassoc(dev, ifsta, 0);
4327         return 0;
4328 }
4329
4330 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4331                           enum ieee80211_notification_types  notif_type)
4332 {
4333         struct ieee80211_local *local = hw_to_local(hw);
4334         struct ieee80211_sub_if_data *sdata;
4335
4336         switch (notif_type) {
4337         case IEEE80211_NOTIFY_RE_ASSOC:
4338                 rcu_read_lock();
4339                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4340
4341                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4342                                 ieee80211_sta_req_auth(sdata->dev,
4343                                                        &sdata->u.sta);
4344                         }
4345
4346                 }
4347                 rcu_read_unlock();
4348                 break;
4349         }
4350 }
4351 EXPORT_SYMBOL(ieee80211_notify_mac);