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 = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
 261                         local->ops->conf_tx(local_to_hw(local),
 262                                            i + IEEE80211_TX_QUEUE_DATA0,
 263                                            &qparam);
 264
 265                 if (ibss) {
 266                         /* IBSS uses different parameters for Beacon sending */
 267                         qparam.cw_min++;
 268                         qparam.cw_min *= 2;
 269                         qparam.cw_min--;
 270                         local->ops->conf_tx(local_to_hw(local),
 271                                            IEEE80211_TX_QUEUE_BEACON, &qparam);
 272                 }
 273         }
 274 }
 275
 276 static void ieee80211_sta_wmm_params(struct net_device *dev,
 277                                      struct ieee80211_if_sta *ifsta,
 278                                      u8 *wmm_param, size_t wmm_param_len)
 279 {
 280         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 281         struct ieee80211_tx_queue_params params;
 282         size_t left;
 283         int count;
 284         u8 *pos;
 285
 286         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 287                 return;
 288         count = wmm_param[6] & 0x0f;
 289         if (count == ifsta->wmm_last_param_set)
 290                 return;
 291         ifsta->wmm_last_param_set = count;
 292
 293         pos = wmm_param + 8;
 294         left = wmm_param_len - 8;
 295
 296         memset(&params, 0, sizeof(params));
 297
 298         if (!local->ops->conf_tx)
 299                 return;
 300
 301         local->wmm_acm = 0;
 302         for (; left >= 4; left -= 4, pos += 4) {
 303                 int aci = (pos[0] >> 5) & 0x03;
 304                 int acm = (pos[0] >> 4) & 0x01;
 305                 int queue;
 306
 307                 switch (aci) {
 308                 case 1:
 309                         queue = IEEE80211_TX_QUEUE_DATA3;
 310                         if (acm)
 311                                 local->wmm_acm |= BIT(0) | BIT(3);
 312                         break;
 313                 case 2:
 314                         queue = IEEE80211_TX_QUEUE_DATA1;
 315                         if (acm)
 316                                 local->wmm_acm |= BIT(4) | BIT(5);
 317                         break;
 318                 case 3:
 319                         queue = IEEE80211_TX_QUEUE_DATA0;
 320                         if (acm)
 321                                 local->wmm_acm |= BIT(6) | BIT(7);
 322                         break;
 323                 case 0:
 324                 default:
 325                         queue = IEEE80211_TX_QUEUE_DATA2;
 326                         if (acm)
 327                                 local->wmm_acm |= BIT(1) | BIT(2);
 328                         break;
 329                 }
 330
 331                 params.aifs = pos[0] & 0x0f;
 332                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 333                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 334                 params.txop = pos[2] | (pos[3] << 8);
 335 #ifdef CONFIG_MAC80211_DEBUG
 336                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 337                        "cWmin=%d cWmax=%d txop=%d\n",
 338                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 339                        params.cw_max, params.txop);
 340 #endif
 341                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 342                  * AC for now) */
 343                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 344                         printk(KERN_DEBUG "%s: failed to set TX queue "
 345                                "parameters for queue %d\n", dev->name, queue);
 346                 }
 347         }
 348 }
 349
 350 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 351                                            bool use_protection,
 352                                            bool use_short_preamble)
 353 {
 354         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 355         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 356         DECLARE_MAC_BUF(mac);
 357         u32 changed = 0;
 358
 359         if (use_protection != bss_conf->use_cts_prot) {
 360                 if (net_ratelimit()) {
 361                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 362                                "%s)\n",
 363                                sdata->dev->name,
 364                                use_protection ? "enabled" : "disabled",
 365                                print_mac(mac, ifsta->bssid));
 366                 }
 367                 bss_conf->use_cts_prot = use_protection;
 368                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 369         }
 370
 371         if (use_short_preamble != bss_conf->use_short_preamble) {
 372                 if (net_ratelimit()) {
 373                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 374                                " (BSSID=%s)\n",
 375                                sdata->dev->name,
 376                                use_short_preamble ? "short" : "long",
 377                                print_mac(mac, ifsta->bssid));
 378                 }
 379                 bss_conf->use_short_preamble = use_short_preamble;
 380                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 381         }
 382
 383         return changed;
 384 }
 385
 386 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 387                                    u8 erp_value)
 388 {
 389         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 390         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 391
 392         return ieee80211_handle_protect_preamb(sdata,
 393                         use_protection, use_short_preamble);
 394 }
 395
 396 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 397                                            struct ieee80211_sta_bss *bss)
 398 {
 399         u32 changed = 0;
 400
 401         if (bss->has_erp_value)
 402                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 403         else {
 404                 u16 capab = bss->capability;
 405                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 406                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 407         }
 408
 409         return changed;
 410 }
 411
 412 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 413                                    struct ieee80211_ht_info *ht_info)
 414 {
 415
 416         if (ht_info == NULL)
 417                 return -EINVAL;
 418
 419         memset(ht_info, 0, sizeof(*ht_info));
 420
 421         if (ht_cap_ie) {
 422                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 423
 424                 ht_info->ht_supported = 1;
 425                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 426                 ht_info->ampdu_factor =
 427                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 428                 ht_info->ampdu_density =
 429                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 430                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 431         } else
 432                 ht_info->ht_supported = 0;
 433
 434         return 0;
 435 }
 436
 437 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 438                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 439                         struct ieee80211_ht_bss_info *bss_info)
 440 {
 441         if (bss_info == NULL)
 442                 return -EINVAL;
 443
 444         memset(bss_info, 0, sizeof(*bss_info));
 445
 446         if (ht_add_info_ie) {
 447                 u16 op_mode;
 448                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 449
 450                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 451                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 452                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 453         }
 454
 455         return 0;
 456 }
 457
 458 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 459                                          struct ieee80211_if_sta *ifsta)
 460 {
 461         char *buf;
 462         size_t len;
 463         int i;
 464         union iwreq_data wrqu;
 465
 466         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 467                 return;
 468
 469         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 470                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 471         if (!buf)
 472                 return;
 473
 474         len = sprintf(buf, "ASSOCINFO(");
 475         if (ifsta->assocreq_ies) {
 476                 len += sprintf(buf + len, "ReqIEs=");
 477                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 478                         len += sprintf(buf + len, "%02x",
 479                                        ifsta->assocreq_ies[i]);
 480                 }
 481         }
 482         if (ifsta->assocresp_ies) {
 483                 if (ifsta->assocreq_ies)
 484                         len += sprintf(buf + len, " ");
 485                 len += sprintf(buf + len, "RespIEs=");
 486                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 487                         len += sprintf(buf + len, "%02x",
 488                                        ifsta->assocresp_ies[i]);
 489                 }
 490         }
 491         len += sprintf(buf + len, ")");
 492
 493         if (len > IW_CUSTOM_MAX) {
 494                 len = sprintf(buf, "ASSOCRESPIE=");
 495                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 496                         len += sprintf(buf + len, "%02x",
 497                                        ifsta->assocresp_ies[i]);
 498                 }
 499         }
 500
 501         memset(&wrqu, 0, sizeof(wrqu));
 502         wrqu.data.length = len;
 503         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 504
 505         kfree(buf);
 506 }
 507
 508
 509 static void ieee80211_set_associated(struct net_device *dev,
 510                                      struct ieee80211_if_sta *ifsta,
 511                                      bool assoc)
 512 {
 513         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 514         struct ieee80211_local *local = sdata->local;
 515         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 516         union iwreq_data wrqu;
 517         u32 changed = BSS_CHANGED_ASSOC;
 518
 519         if (assoc) {
 520                 struct ieee80211_sta_bss *bss;
 521
 522                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 523
 524                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 525                         return;
 526
 527                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 528                                            conf->channel->center_freq,
 529                                            ifsta->ssid, ifsta->ssid_len);
 530                 if (bss) {
 531                         /* set timing information */
 532                         sdata->bss_conf.beacon_int = bss->beacon_int;
 533                         sdata->bss_conf.timestamp = bss->timestamp;
 534
 535                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 536
 537                         ieee80211_rx_bss_put(dev, bss);
 538                 }
 539
 540                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 541                         changed |= BSS_CHANGED_HT;
 542                         sdata->bss_conf.assoc_ht = 1;
 543                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 544                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 545                 }
 546
 547                 netif_carrier_on(dev);
 548                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 549                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 550                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 551                 ieee80211_sta_send_associnfo(dev, ifsta);
 552         } else {
 553                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 554                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 555                 netif_carrier_off(dev);
 556                 ieee80211_reset_erp_info(dev);
 557
 558                 sdata->bss_conf.assoc_ht = 0;
 559                 sdata->bss_conf.ht_conf = NULL;
 560                 sdata->bss_conf.ht_bss_conf = NULL;
 561
 562                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 563         }
 564         ifsta->last_probe = jiffies;
 565         ieee80211_led_assoc(local, assoc);
 566
 567         sdata->bss_conf.assoc = assoc;
 568         ieee80211_bss_info_change_notify(sdata, changed);
 569         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 570         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 571 }
 572
 573 static void ieee80211_set_disassoc(struct net_device *dev,
 574                                    struct ieee80211_if_sta *ifsta, int deauth)
 575 {
 576         if (deauth)
 577                 ifsta->auth_tries = 0;
 578         ifsta->assoc_tries = 0;
 579         ieee80211_set_associated(dev, ifsta, 0);
 580 }
 581
 582 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 583                       int encrypt)
 584 {
 585         struct ieee80211_sub_if_data *sdata;
 586         struct ieee80211_tx_packet_data *pkt_data;
 587
 588         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 589         skb->dev = sdata->local->mdev;
 590         skb_set_mac_header(skb, 0);
 591         skb_set_network_header(skb, 0);
 592         skb_set_transport_header(skb, 0);
 593
 594         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 595         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 596         pkt_data->ifindex = sdata->dev->ifindex;
 597         if (!encrypt)
 598                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 599
 600         dev_queue_xmit(skb);
 601 }
 602
 603
 604 static void ieee80211_send_auth(struct net_device *dev,
 605                                 struct ieee80211_if_sta *ifsta,
 606                                 int transaction, u8 *extra, size_t extra_len,
 607                                 int encrypt)
 608 {
 609         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 610         struct sk_buff *skb;
 611         struct ieee80211_mgmt *mgmt;
 612
 613         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 614                             sizeof(*mgmt) + 6 + extra_len);
 615         if (!skb) {
 616                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 617                        "frame\n", dev->name);
 618                 return;
 619         }
 620         skb_reserve(skb, local->hw.extra_tx_headroom);
 621
 622         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 623         memset(mgmt, 0, 24 + 6);
 624         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 625                                            IEEE80211_STYPE_AUTH);
 626         if (encrypt)
 627                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 628         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 629         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 630         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 631         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 632         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 633         ifsta->auth_transaction = transaction + 1;
 634         mgmt->u.auth.status_code = cpu_to_le16(0);
 635         if (extra)
 636                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 637
 638         ieee80211_sta_tx(dev, skb, encrypt);
 639 }
 640
 641
 642 static void ieee80211_authenticate(struct net_device *dev,
 643                                    struct ieee80211_if_sta *ifsta)
 644 {
 645         DECLARE_MAC_BUF(mac);
 646
 647         ifsta->auth_tries++;
 648         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 649                 printk(KERN_DEBUG "%s: authentication with AP %s"
 650                        " timed out\n",
 651                        dev->name, print_mac(mac, ifsta->bssid));
 652                 ifsta->state = IEEE80211_DISABLED;
 653                 return;
 654         }
 655
 656         ifsta->state = IEEE80211_AUTHENTICATE;
 657         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 658                dev->name, print_mac(mac, ifsta->bssid));
 659
 660         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 661
 662         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 663 }
 664
 665
 666 static void ieee80211_send_assoc(struct net_device *dev,
 667                                  struct ieee80211_if_sta *ifsta)
 668 {
 669         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 670         struct sk_buff *skb;
 671         struct ieee80211_mgmt *mgmt;
 672         u8 *pos, *ies;
 673         int i, len;
 674         u16 capab;
 675         struct ieee80211_sta_bss *bss;
 676         int wmm = 0;
 677         struct ieee80211_supported_band *sband;
 678
 679         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 680                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 681                             ifsta->ssid_len);
 682         if (!skb) {
 683                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 684                        "frame\n", dev->name);
 685                 return;
 686         }
 687         skb_reserve(skb, local->hw.extra_tx_headroom);
 688
 689         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 690
 691         capab = ifsta->capab;
 692
 693         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 694                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 695                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 696                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 697                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 698         }
 699
 700         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 701                                    local->hw.conf.channel->center_freq,
 702                                    ifsta->ssid, ifsta->ssid_len);
 703         if (bss) {
 704                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 705                         capab |= WLAN_CAPABILITY_PRIVACY;
 706                 if (bss->wmm_ie)
 707                         wmm = 1;
 708                 ieee80211_rx_bss_put(dev, bss);
 709         }
 710
 711         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 712         memset(mgmt, 0, 24);
 713         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 714         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 715         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 716
 717         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 718                 skb_put(skb, 10);
 719                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 720                                                    IEEE80211_STYPE_REASSOC_REQ);
 721                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 722                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 723                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 724                        ETH_ALEN);
 725         } else {
 726                 skb_put(skb, 4);
 727                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 728                                                    IEEE80211_STYPE_ASSOC_REQ);
 729                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 730                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 731         }
 732
 733         /* SSID */
 734         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 735         *pos++ = WLAN_EID_SSID;
 736         *pos++ = ifsta->ssid_len;
 737         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 738
 739         len = sband->n_bitrates;
 740         if (len > 8)
 741                 len = 8;
 742         pos = skb_put(skb, len + 2);
 743         *pos++ = WLAN_EID_SUPP_RATES;
 744         *pos++ = len;
 745         for (i = 0; i < len; i++) {
 746                 int rate = sband->bitrates[i].bitrate;
 747                 *pos++ = (u8) (rate / 5);
 748         }
 749
 750         if (sband->n_bitrates > len) {
 751                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 752                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 753                 *pos++ = sband->n_bitrates - len;
 754                 for (i = len; i < sband->n_bitrates; i++) {
 755                         int rate = sband->bitrates[i].bitrate;
 756                         *pos++ = (u8) (rate / 5);
 757                 }
 758         }
 759
 760         if (ifsta->extra_ie) {
 761                 pos = skb_put(skb, ifsta->extra_ie_len);
 762                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 763         }
 764
 765         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 766                 pos = skb_put(skb, 9);
 767                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 768                 *pos++ = 7; /* len */
 769                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 770                 *pos++ = 0x50;
 771                 *pos++ = 0xf2;
 772                 *pos++ = 2; /* WME */
 773                 *pos++ = 0; /* WME info */
 774                 *pos++ = 1; /* WME ver */
 775                 *pos++ = 0;
 776         }
 777         /* wmm support is a must to HT */
 778         if (wmm && sband->ht_info.ht_supported) {
 779                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 780                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 781                 *pos++ = WLAN_EID_HT_CAPABILITY;
 782                 *pos++ = sizeof(struct ieee80211_ht_cap);
 783                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 784                 memcpy(pos, &tmp, sizeof(u16));
 785                 pos += sizeof(u16);
 786                 /* TODO: needs a define here for << 2 */
 787                 *pos++ = sband->ht_info.ampdu_factor |
 788                          (sband->ht_info.ampdu_density << 2);
 789                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 790         }
 791
 792         kfree(ifsta->assocreq_ies);
 793         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 794         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 795         if (ifsta->assocreq_ies)
 796                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 797
 798         ieee80211_sta_tx(dev, skb, 0);
 799 }
 800
 801
 802 static void ieee80211_send_deauth(struct net_device *dev,
 803                                   struct ieee80211_if_sta *ifsta, u16 reason)
 804 {
 805         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 806         struct sk_buff *skb;
 807         struct ieee80211_mgmt *mgmt;
 808
 809         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 810         if (!skb) {
 811                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 812                        "frame\n", dev->name);
 813                 return;
 814         }
 815         skb_reserve(skb, local->hw.extra_tx_headroom);
 816
 817         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 818         memset(mgmt, 0, 24);
 819         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 820         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 821         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 822         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 823                                            IEEE80211_STYPE_DEAUTH);
 824         skb_put(skb, 2);
 825         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 826
 827         ieee80211_sta_tx(dev, skb, 0);
 828 }
 829
 830
 831 static void ieee80211_send_disassoc(struct net_device *dev,
 832                                     struct ieee80211_if_sta *ifsta, u16 reason)
 833 {
 834         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 835         struct sk_buff *skb;
 836         struct ieee80211_mgmt *mgmt;
 837
 838         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 839         if (!skb) {
 840                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 841                        "frame\n", dev->name);
 842                 return;
 843         }
 844         skb_reserve(skb, local->hw.extra_tx_headroom);
 845
 846         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 847         memset(mgmt, 0, 24);
 848         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 849         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 850         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 851         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 852                                            IEEE80211_STYPE_DISASSOC);
 853         skb_put(skb, 2);
 854         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 855
 856         ieee80211_sta_tx(dev, skb, 0);
 857 }
 858
 859
 860 static int ieee80211_privacy_mismatch(struct net_device *dev,
 861                                       struct ieee80211_if_sta *ifsta)
 862 {
 863         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 864         struct ieee80211_sta_bss *bss;
 865         int bss_privacy;
 866         int wep_privacy;
 867         int privacy_invoked;
 868
 869         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 870                 return 0;
 871
 872         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 873                                    local->hw.conf.channel->center_freq,
 874                                    ifsta->ssid, ifsta->ssid_len);
 875         if (!bss)
 876                 return 0;
 877
 878         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 879         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 880         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 881
 882         ieee80211_rx_bss_put(dev, bss);
 883
 884         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 885                 return 0;
 886
 887         return 1;
 888 }
 889
 890
 891 static void ieee80211_associate(struct net_device *dev,
 892                                 struct ieee80211_if_sta *ifsta)
 893 {
 894         DECLARE_MAC_BUF(mac);
 895
 896         ifsta->assoc_tries++;
 897         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 898                 printk(KERN_DEBUG "%s: association with AP %s"
 899                        " timed out\n",
 900                        dev->name, print_mac(mac, ifsta->bssid));
 901                 ifsta->state = IEEE80211_DISABLED;
 902                 return;
 903         }
 904
 905         ifsta->state = IEEE80211_ASSOCIATE;
 906         printk(KERN_DEBUG "%s: associate with AP %s\n",
 907                dev->name, print_mac(mac, ifsta->bssid));
 908         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 909                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 910                        "mixed-cell disabled - abort association\n", dev->name);
 911                 ifsta->state = IEEE80211_DISABLED;
 912                 return;
 913         }
 914
 915         ieee80211_send_assoc(dev, ifsta);
 916
 917         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 918 }
 919
 920
 921 static void ieee80211_associated(struct net_device *dev,
 922                                  struct ieee80211_if_sta *ifsta)
 923 {
 924         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 925         struct sta_info *sta;
 926         int disassoc;
 927         DECLARE_MAC_BUF(mac);
 928
 929         /* TODO: start monitoring current AP signal quality and number of
 930          * missed beacons. Scan other channels every now and then and search
 931          * for better APs. */
 932         /* TODO: remove expired BSSes */
 933
 934         ifsta->state = IEEE80211_ASSOCIATED;
 935
 936         rcu_read_lock();
 937
 938         sta = sta_info_get(local, ifsta->bssid);
 939         if (!sta) {
 940                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 941                        dev->name, print_mac(mac, ifsta->bssid));
 942                 disassoc = 1;
 943         } else {
 944                 disassoc = 0;
 945                 if (time_after(jiffies,
 946                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 947                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 948                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 949                                        "current AP %s - assume out of "
 950                                        "range\n",
 951                                        dev->name, print_mac(mac, ifsta->bssid));
 952                                 disassoc = 1;
 953                                 sta_info_unlink(&sta);
 954                         } else
 955                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 956                                                          local->scan_ssid,
 957                                                          local->scan_ssid_len);
 958                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 959                 } else {
 960                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 961                         if (time_after(jiffies, ifsta->last_probe +
 962                                        IEEE80211_PROBE_INTERVAL)) {
 963                                 ifsta->last_probe = jiffies;
 964                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 965                                                          ifsta->ssid,
 966                                                          ifsta->ssid_len);
 967                         }
 968                 }
 969         }
 970
 971         rcu_read_unlock();
 972
 973         if (disassoc && sta)
 974                 sta_info_destroy(sta);
 975
 976         if (disassoc) {
 977                 ifsta->state = IEEE80211_DISABLED;
 978                 ieee80211_set_associated(dev, ifsta, 0);
 979         } else {
 980                 mod_timer(&ifsta->timer, jiffies +
 981                                       IEEE80211_MONITORING_INTERVAL);
 982         }
 983 }
 984
 985
 986 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 987                                      u8 *ssid, size_t ssid_len)
 988 {
 989         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 990         struct ieee80211_supported_band *sband;
 991         struct sk_buff *skb;
 992         struct ieee80211_mgmt *mgmt;
 993         u8 *pos, *supp_rates, *esupp_rates = NULL;
 994         int i;
 995
 996         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 997         if (!skb) {
 998                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 999                        "request\n", dev->name);
1000                 return;
1001         }
1002         skb_reserve(skb, local->hw.extra_tx_headroom);
1003
1004         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1005         memset(mgmt, 0, 24);
1006         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1007                                            IEEE80211_STYPE_PROBE_REQ);
1008         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1009         if (dst) {
1010                 memcpy(mgmt->da, dst, ETH_ALEN);
1011                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1012         } else {
1013                 memset(mgmt->da, 0xff, ETH_ALEN);
1014                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1015         }
1016         pos = skb_put(skb, 2 + ssid_len);
1017         *pos++ = WLAN_EID_SSID;
1018         *pos++ = ssid_len;
1019         memcpy(pos, ssid, ssid_len);
1020
1021         supp_rates = skb_put(skb, 2);
1022         supp_rates[0] = WLAN_EID_SUPP_RATES;
1023         supp_rates[1] = 0;
1024         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1025
1026         for (i = 0; i < sband->n_bitrates; i++) {
1027                 struct ieee80211_rate *rate = &sband->bitrates[i];
1028                 if (esupp_rates) {
1029                         pos = skb_put(skb, 1);
1030                         esupp_rates[1]++;
1031                 } else if (supp_rates[1] == 8) {
1032                         esupp_rates = skb_put(skb, 3);
1033                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1034                         esupp_rates[1] = 1;
1035                         pos = &esupp_rates[2];
1036                 } else {
1037                         pos = skb_put(skb, 1);
1038                         supp_rates[1]++;
1039                 }
1040                 *pos = rate->bitrate / 5;
1041         }
1042
1043         ieee80211_sta_tx(dev, skb, 0);
1044 }
1045
1046
1047 static int ieee80211_sta_wep_configured(struct net_device *dev)
1048 {
1049         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1050         if (!sdata || !sdata->default_key ||
1051             sdata->default_key->conf.alg != ALG_WEP)
1052                 return 0;
1053         return 1;
1054 }
1055
1056
1057 static void ieee80211_auth_completed(struct net_device *dev,
1058                                      struct ieee80211_if_sta *ifsta)
1059 {
1060         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1061         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1062         ieee80211_associate(dev, ifsta);
1063 }
1064
1065
1066 static void ieee80211_auth_challenge(struct net_device *dev,
1067                                      struct ieee80211_if_sta *ifsta,
1068                                      struct ieee80211_mgmt *mgmt,
1069                                      size_t len)
1070 {
1071         u8 *pos;
1072         struct ieee802_11_elems elems;
1073
1074         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1075         pos = mgmt->u.auth.variable;
1076         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1077         if (!elems.challenge) {
1078                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1079                        "frame\n", dev->name);
1080                 return;
1081         }
1082         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1083                             elems.challenge_len + 2, 1);
1084 }
1085
1086 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1087                                         u8 dialog_token, u16 status, u16 policy,
1088                                         u16 buf_size, u16 timeout)
1089 {
1090         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1091         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1092         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1093         struct sk_buff *skb;
1094         struct ieee80211_mgmt *mgmt;
1095         u16 capab;
1096
1097         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1098
1099         if (!skb) {
1100                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1101                        "for addba resp frame\n", dev->name);
1102                 return;
1103         }
1104
1105         skb_reserve(skb, local->hw.extra_tx_headroom);
1106         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1107         memset(mgmt, 0, 24);
1108         memcpy(mgmt->da, da, ETH_ALEN);
1109         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1110         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1111                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1112         else
1113                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1114         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1115                                            IEEE80211_STYPE_ACTION);
1116
1117         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1118         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1119         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1120         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1121
1122         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1123         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1124         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1125
1126         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1127         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1128         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1129
1130         ieee80211_sta_tx(dev, skb, 0);
1131
1132         return;
1133 }
1134
1135 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1136                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1137                                 u16 agg_size, u16 timeout)
1138 {
1139         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1140         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1141         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1142         struct sk_buff *skb;
1143         struct ieee80211_mgmt *mgmt;
1144         u16 capab;
1145
1146         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1147
1148         if (!skb) {
1149                 printk(KERN_ERR "%s: failed to allocate buffer "
1150                                 "for addba request frame\n", dev->name);
1151                 return;
1152         }
1153         skb_reserve(skb, local->hw.extra_tx_headroom);
1154         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1155         memset(mgmt, 0, 24);
1156         memcpy(mgmt->da, da, ETH_ALEN);
1157         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1158         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1159                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1160         else
1161                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1162
1163         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1164                                         IEEE80211_STYPE_ACTION);
1165
1166         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1167
1168         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1169         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1170
1171         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1172         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1173         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1174         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1175
1176         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1177
1178         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1179         mgmt->u.action.u.addba_req.start_seq_num =
1180                                         cpu_to_le16(start_seq_num << 4);
1181
1182         ieee80211_sta_tx(dev, skb, 0);
1183 }
1184
1185 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1186                                                 struct ieee80211_mgmt *mgmt,
1187                                                 size_t len)
1188 {
1189         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1190         struct ieee80211_hw *hw = &local->hw;
1191         struct ieee80211_conf *conf = &hw->conf;
1192         struct sta_info *sta;
1193         struct tid_ampdu_rx *tid_agg_rx;
1194         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1195         u8 dialog_token;
1196         int ret = -EOPNOTSUPP;
1197         DECLARE_MAC_BUF(mac);
1198
1199         rcu_read_lock();
1200
1201         sta = sta_info_get(local, mgmt->sa);
1202         if (!sta) {
1203                 rcu_read_unlock();
1204                 return;
1205         }
1206
1207         /* extract session parameters from addba request frame */
1208         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1209         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1210         start_seq_num =
1211                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1212
1213         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1214         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1215         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1216         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1217
1218         status = WLAN_STATUS_REQUEST_DECLINED;
1219
1220         /* sanity check for incoming parameters:
1221          * check if configuration can support the BA policy
1222          * and if buffer size does not exceeds max value */
1223         if (((ba_policy != 1)
1224                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1225                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1226                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1227 #ifdef CONFIG_MAC80211_HT_DEBUG
1228                 if (net_ratelimit())
1229                         printk(KERN_DEBUG "AddBA Req with bad params from "
1230                                 "%s on tid %u. policy %d, buffer size %d\n",
1231                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1232                                 buf_size);
1233 #endif /* CONFIG_MAC80211_HT_DEBUG */
1234                 goto end_no_lock;
1235         }
1236         /* determine default buffer size */
1237         if (buf_size == 0) {
1238                 struct ieee80211_supported_band *sband;
1239
1240                 sband = local->hw.wiphy->bands[conf->channel->band];
1241                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1242                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1243         }
1244
1245
1246         /* examine state machine */
1247         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1248
1249         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1250 #ifdef CONFIG_MAC80211_HT_DEBUG
1251                 if (net_ratelimit())
1252                         printk(KERN_DEBUG "unexpected AddBA Req from "
1253                                 "%s on tid %u\n",
1254                                 print_mac(mac, mgmt->sa), tid);
1255 #endif /* CONFIG_MAC80211_HT_DEBUG */
1256                 goto end;
1257         }
1258
1259         /* prepare A-MPDU MLME for Rx aggregation */
1260         sta->ampdu_mlme.tid_rx[tid] =
1261                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1262         if (!sta->ampdu_mlme.tid_rx[tid]) {
1263                 if (net_ratelimit())
1264                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1265                                         tid);
1266                 goto end;
1267         }
1268         /* rx timer */
1269         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1270                                 sta_rx_agg_session_timer_expired;
1271         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1272                                 (unsigned long)&sta->timer_to_tid[tid];
1273         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1274
1275         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1276
1277         /* prepare reordering buffer */
1278         tid_agg_rx->reorder_buf =
1279                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1280         if (!tid_agg_rx->reorder_buf) {
1281                 if (net_ratelimit())
1282                         printk(KERN_ERR "can not allocate reordering buffer "
1283                                "to tid %d\n", tid);
1284                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1285                 goto end;
1286         }
1287         memset(tid_agg_rx->reorder_buf, 0,
1288                 buf_size * sizeof(struct sk_buf *));
1289
1290         if (local->ops->ampdu_action)
1291                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1292                                                sta->addr, tid, &start_seq_num);
1293 #ifdef CONFIG_MAC80211_HT_DEBUG
1294         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1295 #endif /* CONFIG_MAC80211_HT_DEBUG */
1296
1297         if (ret) {
1298                 kfree(tid_agg_rx->reorder_buf);
1299                 kfree(tid_agg_rx);
1300                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1301                 goto end;
1302         }
1303
1304         /* change state and send addba resp */
1305         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1306         tid_agg_rx->dialog_token = dialog_token;
1307         tid_agg_rx->ssn = start_seq_num;
1308         tid_agg_rx->head_seq_num = start_seq_num;
1309         tid_agg_rx->buf_size = buf_size;
1310         tid_agg_rx->timeout = timeout;
1311         tid_agg_rx->stored_mpdu_num = 0;
1312         status = WLAN_STATUS_SUCCESS;
1313 end:
1314         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1315
1316 end_no_lock:
1317         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1318                                   dialog_token, status, 1, buf_size, timeout);
1319         rcu_read_unlock();
1320 }
1321
1322 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1323                                              struct ieee80211_mgmt *mgmt,
1324                                              size_t len)
1325 {
1326         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1327         struct ieee80211_hw *hw = &local->hw;
1328         struct sta_info *sta;
1329         u16 capab;
1330         u16 tid;
1331         u8 *state;
1332
1333         rcu_read_lock();
1334
1335         sta = sta_info_get(local, mgmt->sa);
1336         if (!sta) {
1337                 rcu_read_unlock();
1338                 return;
1339         }
1340
1341         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1342         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1343
1344         state = &sta->ampdu_mlme.tid_state_tx[tid];
1345
1346         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1347
1348         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1349                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1350                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1351                         "%d\n", *state);
1352                 goto addba_resp_exit;
1353         }
1354
1355         if (mgmt->u.action.u.addba_resp.dialog_token !=
1356                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1357                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1358 #ifdef CONFIG_MAC80211_HT_DEBUG
1359                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1360 #endif /* CONFIG_MAC80211_HT_DEBUG */
1361                 goto addba_resp_exit;
1362         }
1363
1364         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1365 #ifdef CONFIG_MAC80211_HT_DEBUG
1366         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1367 #endif /* CONFIG_MAC80211_HT_DEBUG */
1368         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1369                         == WLAN_STATUS_SUCCESS) {
1370                 if (*state & HT_ADDBA_RECEIVED_MSK)
1371                         printk(KERN_DEBUG "double addBA response\n");
1372
1373                 *state |= HT_ADDBA_RECEIVED_MSK;
1374                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1375
1376                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1377                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1378                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1379                 }
1380
1381                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1382                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1383         } else {
1384                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1385
1386                 sta->ampdu_mlme.addba_req_num[tid]++;
1387                 /* this will allow the state check in stop_BA_session */
1388                 *state = HT_AGG_STATE_OPERATIONAL;
1389                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1390                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1391                                              WLAN_BACK_INITIATOR);
1392         }
1393
1394 addba_resp_exit:
1395         rcu_read_unlock();
1396 }
1397
1398 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1399                           u16 initiator, u16 reason_code)
1400 {
1401         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1402         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1403         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1404         struct sk_buff *skb;
1405         struct ieee80211_mgmt *mgmt;
1406         u16 params;
1407
1408         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1409
1410         if (!skb) {
1411                 printk(KERN_ERR "%s: failed to allocate buffer "
1412                                         "for delba frame\n", dev->name);
1413                 return;
1414         }
1415
1416         skb_reserve(skb, local->hw.extra_tx_headroom);
1417         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1418         memset(mgmt, 0, 24);
1419         memcpy(mgmt->da, da, ETH_ALEN);
1420         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1421         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1422                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1423         else
1424                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1425         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1426                                         IEEE80211_STYPE_ACTION);
1427
1428         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1429
1430         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1431         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1432         params = (u16)(initiator << 11);        /* bit 11 initiator */
1433         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1434
1435         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1436         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1437
1438         ieee80211_sta_tx(dev, skb, 0);
1439 }
1440
1441 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1442                                         u16 initiator, u16 reason)
1443 {
1444         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1445         struct ieee80211_hw *hw = &local->hw;
1446         struct sta_info *sta;
1447         int ret, i;
1448         DECLARE_MAC_BUF(mac);
1449
1450         rcu_read_lock();
1451
1452         sta = sta_info_get(local, ra);
1453         if (!sta) {
1454                 rcu_read_unlock();
1455                 return;
1456         }
1457
1458         /* check if TID is in operational state */
1459         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1460         if (sta->ampdu_mlme.tid_state_rx[tid]
1461                                 != HT_AGG_STATE_OPERATIONAL) {
1462                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1463                 rcu_read_unlock();
1464                 return;
1465         }
1466         sta->ampdu_mlme.tid_state_rx[tid] =
1467                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1468                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1469         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1470
1471         /* stop HW Rx aggregation. ampdu_action existence
1472          * already verified in session init so we add the BUG_ON */
1473         BUG_ON(!local->ops->ampdu_action);
1474
1475 #ifdef CONFIG_MAC80211_HT_DEBUG
1476         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1477                                 print_mac(mac, ra), tid);
1478 #endif /* CONFIG_MAC80211_HT_DEBUG */
1479
1480         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1481                                         ra, tid, NULL);
1482         if (ret)
1483                 printk(KERN_DEBUG "HW problem - can not stop rx "
1484                                 "aggergation for tid %d\n", tid);
1485
1486         /* shutdown timer has not expired */
1487         if (initiator != WLAN_BACK_TIMER)
1488                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1489
1490         /* check if this is a self generated aggregation halt */
1491         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1492                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1493
1494         /* free the reordering buffer */
1495         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1496                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1497                         /* release the reordered frames */
1498                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1499                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1500                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1501                 }
1502         }
1503         /* free resources */
1504         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1505         kfree(sta->ampdu_mlme.tid_rx[tid]);
1506         sta->ampdu_mlme.tid_rx[tid] = NULL;
1507         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1508
1509         rcu_read_unlock();
1510 }
1511
1512
1513 static void ieee80211_sta_process_delba(struct net_device *dev,
1514                         struct ieee80211_mgmt *mgmt, size_t len)
1515 {
1516         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1517         struct sta_info *sta;
1518         u16 tid, params;
1519         u16 initiator;
1520         DECLARE_MAC_BUF(mac);
1521
1522         rcu_read_lock();
1523
1524         sta = sta_info_get(local, mgmt->sa);
1525         if (!sta) {
1526                 rcu_read_unlock();
1527                 return;
1528         }
1529
1530         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1531         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1532         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1533
1534 #ifdef CONFIG_MAC80211_HT_DEBUG
1535         if (net_ratelimit())
1536                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1537                         print_mac(mac, mgmt->sa),
1538                         initiator ? "initiator" : "recipient", tid,
1539                         mgmt->u.action.u.delba.reason_code);
1540 #endif /* CONFIG_MAC80211_HT_DEBUG */
1541
1542         if (initiator == WLAN_BACK_INITIATOR)
1543                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1544                                                  WLAN_BACK_INITIATOR, 0);
1545         else { /* WLAN_BACK_RECIPIENT */
1546                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1547                 sta->ampdu_mlme.tid_state_tx[tid] =
1548                                 HT_AGG_STATE_OPERATIONAL;
1549                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1550                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1551                                              WLAN_BACK_RECIPIENT);
1552         }
1553         rcu_read_unlock();
1554 }
1555
1556 /*
1557  * After sending add Block Ack request we activated a timer until
1558  * add Block Ack response will arrive from the recipient.
1559  * If this timer expires sta_addba_resp_timer_expired will be executed.
1560  */
1561 void sta_addba_resp_timer_expired(unsigned long data)
1562 {
1563         /* not an elegant detour, but there is no choice as the timer passes
1564          * only one argument, and both sta_info and TID are needed, so init
1565          * flow in sta_info_create gives the TID as data, while the timer_to_id
1566          * array gives the sta through container_of */
1567         u16 tid = *(int *)data;
1568         struct sta_info *temp_sta = container_of((void *)data,
1569                 struct sta_info, timer_to_tid[tid]);
1570
1571         struct ieee80211_local *local = temp_sta->local;
1572         struct ieee80211_hw *hw = &local->hw;
1573         struct sta_info *sta;
1574         u8 *state;
1575
1576         rcu_read_lock();
1577
1578         sta = sta_info_get(local, temp_sta->addr);
1579         if (!sta) {
1580                 rcu_read_unlock();
1581                 return;
1582         }
1583
1584         state = &sta->ampdu_mlme.tid_state_tx[tid];
1585         /* check if the TID waits for addBA response */
1586         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1587         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1588                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1589                 *state = HT_AGG_STATE_IDLE;
1590                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1591                                 "expecting addBA response there", tid);
1592                 goto timer_expired_exit;
1593         }
1594
1595         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1596
1597         /* go through the state check in stop_BA_session */
1598         *state = HT_AGG_STATE_OPERATIONAL;
1599         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1600         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1601                                      WLAN_BACK_INITIATOR);
1602
1603 timer_expired_exit:
1604         rcu_read_unlock();
1605 }
1606
1607 /*
1608  * After accepting the AddBA Request we activated a timer,
1609  * resetting it after each frame that arrives from the originator.
1610  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1611  */
1612 static void sta_rx_agg_session_timer_expired(unsigned long data)
1613 {
1614         /* not an elegant detour, but there is no choice as the timer passes
1615          * only one argument, and verious sta_info are needed here, so init
1616          * flow in sta_info_create gives the TID as data, while the timer_to_id
1617          * array gives the sta through container_of */
1618         u8 *ptid = (u8 *)data;
1619         u8 *timer_to_id = ptid - *ptid;
1620         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1621                                          timer_to_tid[0]);
1622
1623         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1624         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1625                                          (u16)*ptid, WLAN_BACK_TIMER,
1626                                          WLAN_REASON_QSTA_TIMEOUT);
1627 }
1628
1629 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1630 {
1631         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1632         int i;
1633
1634         for (i = 0; i <  STA_TID_NUM; i++) {
1635                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1636                                              WLAN_BACK_INITIATOR);
1637                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1638                                                  WLAN_BACK_RECIPIENT,
1639                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1640         }
1641 }
1642
1643 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1644                                    struct ieee80211_if_sta *ifsta,
1645                                    struct ieee80211_mgmt *mgmt,
1646                                    size_t len)
1647 {
1648         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1649         u16 auth_alg, auth_transaction, status_code;
1650         DECLARE_MAC_BUF(mac);
1651
1652         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1653             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1654                 printk(KERN_DEBUG "%s: authentication frame received from "
1655                        "%s, but not in authenticate state - ignored\n",
1656                        dev->name, print_mac(mac, mgmt->sa));
1657                 return;
1658         }
1659
1660         if (len < 24 + 6) {
1661                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1662                        "received from %s - ignored\n",
1663                        dev->name, len, print_mac(mac, mgmt->sa));
1664                 return;
1665         }
1666
1667         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1668             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1669                 printk(KERN_DEBUG "%s: authentication frame received from "
1670                        "unknown AP (SA=%s BSSID=%s) - "
1671                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1672                        print_mac(mac, mgmt->bssid));
1673                 return;
1674         }
1675
1676         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1677             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1678                 printk(KERN_DEBUG "%s: authentication frame received from "
1679                        "unknown BSSID (SA=%s BSSID=%s) - "
1680                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1681                        print_mac(mac, mgmt->bssid));
1682                 return;
1683         }
1684
1685         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1686         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1687         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1688
1689         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1690                "transaction=%d status=%d)\n",
1691                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1692                auth_transaction, status_code);
1693
1694         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1695                 /* IEEE 802.11 standard does not require authentication in IBSS
1696                  * networks and most implementations do not seem to use it.
1697                  * However, try to reply to authentication attempts if someone
1698                  * has actually implemented this.
1699                  * TODO: Could implement shared key authentication. */
1700                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1701                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1702                                "frame (alg=%d transaction=%d)\n",
1703                                dev->name, auth_alg, auth_transaction);
1704                         return;
1705                 }
1706                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1707         }
1708
1709         if (auth_alg != ifsta->auth_alg ||
1710             auth_transaction != ifsta->auth_transaction) {
1711                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1712                        "(alg=%d transaction=%d)\n",
1713                        dev->name, auth_alg, auth_transaction);
1714                 return;
1715         }
1716
1717         if (status_code != WLAN_STATUS_SUCCESS) {
1718                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1719                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1720                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1721                         u8 algs[3];
1722                         const int num_algs = ARRAY_SIZE(algs);
1723                         int i, pos;
1724                         algs[0] = algs[1] = algs[2] = 0xff;
1725                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1726                                 algs[0] = WLAN_AUTH_OPEN;
1727                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1728                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1729                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1730                                 algs[2] = WLAN_AUTH_LEAP;
1731                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1732                                 pos = 0;
1733                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1734                                 pos = 1;
1735                         else
1736                                 pos = 2;
1737                         for (i = 0; i < num_algs; i++) {
1738                                 pos++;
1739                                 if (pos >= num_algs)
1740                                         pos = 0;
1741                                 if (algs[pos] == ifsta->auth_alg ||
1742                                     algs[pos] == 0xff)
1743                                         continue;
1744                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1745                                     !ieee80211_sta_wep_configured(dev))
1746                                         continue;
1747                                 ifsta->auth_alg = algs[pos];
1748                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1749                                        "next try\n",
1750                                        dev->name, ifsta->auth_alg);
1751                                 break;
1752                         }
1753                 }
1754                 return;
1755         }
1756
1757         switch (ifsta->auth_alg) {
1758         case WLAN_AUTH_OPEN:
1759         case WLAN_AUTH_LEAP:
1760                 ieee80211_auth_completed(dev, ifsta);
1761                 break;
1762         case WLAN_AUTH_SHARED_KEY:
1763                 if (ifsta->auth_transaction == 4)
1764                         ieee80211_auth_completed(dev, ifsta);
1765                 else
1766                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1767                 break;
1768         }
1769 }
1770
1771
1772 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1773                                      struct ieee80211_if_sta *ifsta,
1774                                      struct ieee80211_mgmt *mgmt,
1775                                      size_t len)
1776 {
1777         u16 reason_code;
1778         DECLARE_MAC_BUF(mac);
1779
1780         if (len < 24 + 2) {
1781                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1782                        "received from %s - ignored\n",
1783                        dev->name, len, print_mac(mac, mgmt->sa));
1784                 return;
1785         }
1786
1787         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1788                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1789                        "unknown AP (SA=%s BSSID=%s) - "
1790                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1791                        print_mac(mac, mgmt->bssid));
1792                 return;
1793         }
1794
1795         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1796
1797         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1798                " (reason=%d)\n",
1799                dev->name, print_mac(mac, mgmt->sa), reason_code);
1800
1801         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1802                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1803
1804         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1805             ifsta->state == IEEE80211_ASSOCIATE ||
1806             ifsta->state == IEEE80211_ASSOCIATED) {
1807                 ifsta->state = IEEE80211_AUTHENTICATE;
1808                 mod_timer(&ifsta->timer, jiffies +
1809                                       IEEE80211_RETRY_AUTH_INTERVAL);
1810         }
1811
1812         ieee80211_set_disassoc(dev, ifsta, 1);
1813         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1814 }
1815
1816
1817 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1818                                        struct ieee80211_if_sta *ifsta,
1819                                        struct ieee80211_mgmt *mgmt,
1820                                        size_t len)
1821 {
1822         u16 reason_code;
1823         DECLARE_MAC_BUF(mac);
1824
1825         if (len < 24 + 2) {
1826                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1827                        "received from %s - ignored\n",
1828                        dev->name, len, print_mac(mac, mgmt->sa));
1829                 return;
1830         }
1831
1832         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1833                 printk(KERN_DEBUG "%s: disassociation frame received from "
1834                        "unknown AP (SA=%s BSSID=%s) - "
1835                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1836                        print_mac(mac, mgmt->bssid));
1837                 return;
1838         }
1839
1840         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1841
1842         printk(KERN_DEBUG "%s: RX disassociation from %s"
1843                " (reason=%d)\n",
1844                dev->name, print_mac(mac, mgmt->sa), reason_code);
1845
1846         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1847                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1848
1849         if (ifsta->state == IEEE80211_ASSOCIATED) {
1850                 ifsta->state = IEEE80211_ASSOCIATE;
1851                 mod_timer(&ifsta->timer, jiffies +
1852                                       IEEE80211_RETRY_AUTH_INTERVAL);
1853         }
1854
1855         ieee80211_set_disassoc(dev, ifsta, 0);
1856 }
1857
1858
1859 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1860                                          struct ieee80211_if_sta *ifsta,
1861                                          struct ieee80211_mgmt *mgmt,
1862                                          size_t len,
1863                                          int reassoc)
1864 {
1865         struct ieee80211_local *local = sdata->local;
1866         struct net_device *dev = sdata->dev;
1867         struct ieee80211_supported_band *sband;
1868         struct sta_info *sta;
1869         u64 rates, basic_rates;
1870         u16 capab_info, status_code, aid;
1871         struct ieee802_11_elems elems;
1872         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1873         u8 *pos;
1874         int i, j;
1875         DECLARE_MAC_BUF(mac);
1876         bool have_higher_than_11mbit = false;
1877
1878         /* AssocResp and ReassocResp have identical structure, so process both
1879          * of them in this function. */
1880
1881         if (ifsta->state != IEEE80211_ASSOCIATE) {
1882                 printk(KERN_DEBUG "%s: association frame received from "
1883                        "%s, but not in associate state - ignored\n",
1884                        dev->name, print_mac(mac, mgmt->sa));
1885                 return;
1886         }
1887
1888         if (len < 24 + 6) {
1889                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1890                        "received from %s - ignored\n",
1891                        dev->name, len, print_mac(mac, mgmt->sa));
1892                 return;
1893         }
1894
1895         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1896                 printk(KERN_DEBUG "%s: association frame received from "
1897                        "unknown AP (SA=%s BSSID=%s) - "
1898                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1899                        print_mac(mac, mgmt->bssid));
1900                 return;
1901         }
1902
1903         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1904         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1905         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1906
1907         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1908                "status=%d aid=%d)\n",
1909                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1910                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1911
1912         if (status_code != WLAN_STATUS_SUCCESS) {
1913                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1914                        dev->name, status_code);
1915                 /* if this was a reassociation, ensure we try a "full"
1916                  * association next time. This works around some broken APs
1917                  * which do not correctly reject reassociation requests. */
1918                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1919                 return;
1920         }
1921
1922         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1923                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1924                        "set\n", dev->name, aid);
1925         aid &= ~(BIT(15) | BIT(14));
1926
1927         pos = mgmt->u.assoc_resp.variable;
1928         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1929
1930         if (!elems.supp_rates) {
1931                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1932                        dev->name);
1933                 return;
1934         }
1935
1936         printk(KERN_DEBUG "%s: associated\n", dev->name);
1937         ifsta->aid = aid;
1938         ifsta->ap_capab = capab_info;
1939
1940         kfree(ifsta->assocresp_ies);
1941         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1942         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1943         if (ifsta->assocresp_ies)
1944                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1945
1946         rcu_read_lock();
1947
1948         /* Add STA entry for the AP */
1949         sta = sta_info_get(local, ifsta->bssid);
1950         if (!sta) {
1951                 struct ieee80211_sta_bss *bss;
1952                 int err;
1953
1954                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1955                 if (!sta) {
1956                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1957                                " the AP\n", dev->name);
1958                         rcu_read_unlock();
1959                         return;
1960                 }
1961                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1962                                            local->hw.conf.channel->center_freq,
1963                                            ifsta->ssid, ifsta->ssid_len);
1964                 if (bss) {
1965                         sta->last_rssi = bss->rssi;
1966                         sta->last_signal = bss->signal;
1967                         sta->last_noise = bss->noise;
1968                         ieee80211_rx_bss_put(dev, bss);
1969                 }
1970
1971                 err = sta_info_insert(sta);
1972                 if (err) {
1973                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1974                                " the AP (error %d)\n", dev->name, err);
1975                         rcu_read_unlock();
1976                         return;
1977                 }
1978         }
1979
1980         /*
1981          * FIXME: Do we really need to update the sta_info's information here?
1982          *        We already know about the AP (we found it in our list) so it
1983          *        should already be filled with the right info, no?
1984          *        As is stands, all this is racy because typically we assume
1985          *        the information that is filled in here (except flags) doesn't
1986          *        change while a STA structure is alive. As such, it should move
1987          *        to between the sta_info_alloc() and sta_info_insert() above.
1988          */
1989
1990         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1991                       WLAN_STA_AUTHORIZED;
1992
1993         rates = 0;
1994         basic_rates = 0;
1995         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1996
1997         for (i = 0; i < elems.supp_rates_len; i++) {
1998                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1999
2000                 if (rate > 110)
2001                         have_higher_than_11mbit = true;
2002
2003                 for (j = 0; j < sband->n_bitrates; j++) {
2004                         if (sband->bitrates[j].bitrate == rate)
2005                                 rates |= BIT(j);
2006                         if (elems.supp_rates[i] & 0x80)
2007                                 basic_rates |= BIT(j);
2008                 }
2009         }
2010
2011         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2012                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2013
2014                 if (rate > 110)
2015                         have_higher_than_11mbit = true;
2016
2017                 for (j = 0; j < sband->n_bitrates; j++) {
2018                         if (sband->bitrates[j].bitrate == rate)
2019                                 rates |= BIT(j);
2020                         if (elems.ext_supp_rates[i] & 0x80)
2021                                 basic_rates |= BIT(j);
2022                 }
2023         }
2024
2025         sta->supp_rates[local->hw.conf.channel->band] = rates;
2026         sdata->basic_rates = basic_rates;
2027
2028         /* cf. IEEE 802.11 9.2.12 */
2029         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2030             have_higher_than_11mbit)
2031                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2032         else
2033                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2034
2035         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
2036                 struct ieee80211_ht_bss_info bss_info;
2037                 ieee80211_ht_cap_ie_to_ht_info(
2038                                 (struct ieee80211_ht_cap *)
2039                                 elems.ht_cap_elem, &sta->ht_info);
2040                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2041                                 (struct ieee80211_ht_addt_info *)
2042                                 elems.ht_info_elem, &bss_info);
2043                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2044         }
2045
2046         rate_control_rate_init(sta, local);
2047
2048         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2049                 sta->flags |= WLAN_STA_WME;
2050                 rcu_read_unlock();
2051                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2052                                          elems.wmm_param_len);
2053         } else
2054                 rcu_read_unlock();
2055
2056         /* set AID and assoc capability,
2057          * ieee80211_set_associated() will tell the driver */
2058         bss_conf->aid = aid;
2059         bss_conf->assoc_capability = capab_info;
2060         ieee80211_set_associated(dev, ifsta, 1);
2061
2062         ieee80211_associated(dev, ifsta);
2063 }
2064
2065
2066 /* Caller must hold local->sta_bss_lock */
2067 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2068                                         struct ieee80211_sta_bss *bss)
2069 {
2070         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2071         u8 hash_idx;
2072
2073         if (bss_mesh_cfg(bss))
2074                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2075                                         bss_mesh_id_len(bss));
2076         else
2077                 hash_idx = STA_HASH(bss->bssid);
2078
2079         bss->hnext = local->sta_bss_hash[hash_idx];
2080         local->sta_bss_hash[hash_idx] = bss;
2081 }
2082
2083
2084 /* Caller must hold local->sta_bss_lock */
2085 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2086                                         struct ieee80211_sta_bss *bss)
2087 {
2088         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2089         struct ieee80211_sta_bss *b, *prev = NULL;
2090         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2091         while (b) {
2092                 if (b == bss) {
2093                         if (!prev)
2094                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2095                                         bss->hnext;
2096                         else
2097                                 prev->hnext = bss->hnext;
2098                         break;
2099                 }
2100                 prev = b;
2101                 b = b->hnext;
2102         }
2103 }
2104
2105
2106 static struct ieee80211_sta_bss *
2107 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2108                      u8 *ssid, u8 ssid_len)
2109 {
2110         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2111         struct ieee80211_sta_bss *bss;
2112
2113         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2114         if (!bss)
2115                 return NULL;
2116         atomic_inc(&bss->users);
2117         atomic_inc(&bss->users);
2118         memcpy(bss->bssid, bssid, ETH_ALEN);
2119         bss->freq = freq;
2120         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2121                 memcpy(bss->ssid, ssid, ssid_len);
2122                 bss->ssid_len = ssid_len;
2123         }
2124
2125         spin_lock_bh(&local->sta_bss_lock);
2126         /* TODO: order by RSSI? */
2127         list_add_tail(&bss->list, &local->sta_bss_list);
2128         __ieee80211_rx_bss_hash_add(dev, bss);
2129         spin_unlock_bh(&local->sta_bss_lock);
2130         return bss;
2131 }
2132
2133 static struct ieee80211_sta_bss *
2134 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2135                      u8 *ssid, u8 ssid_len)
2136 {
2137         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2138         struct ieee80211_sta_bss *bss;
2139
2140         spin_lock_bh(&local->sta_bss_lock);
2141         bss = local->sta_bss_hash[STA_HASH(bssid)];
2142         while (bss) {
2143                 if (!bss_mesh_cfg(bss) &&
2144                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2145                     bss->freq == freq &&
2146                     bss->ssid_len == ssid_len &&
2147                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2148                         atomic_inc(&bss->users);
2149                         break;
2150                 }
2151                 bss = bss->hnext;
2152         }
2153         spin_unlock_bh(&local->sta_bss_lock);
2154         return bss;
2155 }
2156
2157 #ifdef CONFIG_MAC80211_MESH
2158 static struct ieee80211_sta_bss *
2159 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2160                           u8 *mesh_cfg, int freq)
2161 {
2162         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2163         struct ieee80211_sta_bss *bss;
2164
2165         spin_lock_bh(&local->sta_bss_lock);
2166         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2167         while (bss) {
2168                 if (bss_mesh_cfg(bss) &&
2169                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2170                     bss->freq == freq &&
2171                     mesh_id_len == bss->mesh_id_len &&
2172                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2173                                                  mesh_id_len))) {
2174                         atomic_inc(&bss->users);
2175                         break;
2176                 }
2177                 bss = bss->hnext;
2178         }
2179         spin_unlock_bh(&local->sta_bss_lock);
2180         return bss;
2181 }
2182
2183 static struct ieee80211_sta_bss *
2184 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2185                           u8 *mesh_cfg, int mesh_config_len, int freq)
2186 {
2187         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2188         struct ieee80211_sta_bss *bss;
2189
2190         if (mesh_config_len != MESH_CFG_LEN)
2191                 return NULL;
2192
2193         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2194         if (!bss)
2195                 return NULL;
2196
2197         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2198         if (!bss->mesh_cfg) {
2199                 kfree(bss);
2200                 return NULL;
2201         }
2202
2203         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2204                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2205                 if (!bss->mesh_id) {
2206                         kfree(bss->mesh_cfg);
2207                         kfree(bss);
2208                         return NULL;
2209                 }
2210                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2211         }
2212
2213         atomic_inc(&bss->users);
2214         atomic_inc(&bss->users);
2215         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2216         bss->mesh_id_len = mesh_id_len;
2217         bss->freq = freq;
2218         spin_lock_bh(&local->sta_bss_lock);
2219         /* TODO: order by RSSI? */
2220         list_add_tail(&bss->list, &local->sta_bss_list);
2221         __ieee80211_rx_bss_hash_add(dev, bss);
2222         spin_unlock_bh(&local->sta_bss_lock);
2223         return bss;
2224 }
2225 #endif
2226
2227 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2228 {
2229         kfree(bss->wpa_ie);
2230         kfree(bss->rsn_ie);
2231         kfree(bss->wmm_ie);
2232         kfree(bss->ht_ie);
2233         kfree(bss_mesh_id(bss));
2234         kfree(bss_mesh_cfg(bss));
2235         kfree(bss);
2236 }
2237
2238
2239 static void ieee80211_rx_bss_put(struct net_device *dev,
2240                                  struct ieee80211_sta_bss *bss)
2241 {
2242         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2243
2244         local_bh_disable();
2245         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2246                 local_bh_enable();
2247                 return;
2248         }
2249
2250         __ieee80211_rx_bss_hash_del(dev, bss);
2251         list_del(&bss->list);
2252         spin_unlock_bh(&local->sta_bss_lock);
2253         ieee80211_rx_bss_free(bss);
2254 }
2255
2256
2257 void ieee80211_rx_bss_list_init(struct net_device *dev)
2258 {
2259         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2260         spin_lock_init(&local->sta_bss_lock);
2261         INIT_LIST_HEAD(&local->sta_bss_list);
2262 }
2263
2264
2265 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2266 {
2267         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2268         struct ieee80211_sta_bss *bss, *tmp;
2269
2270         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2271                 ieee80211_rx_bss_put(dev, bss);
2272 }
2273
2274
2275 static int ieee80211_sta_join_ibss(struct net_device *dev,
2276                                    struct ieee80211_if_sta *ifsta,
2277                                    struct ieee80211_sta_bss *bss)
2278 {
2279         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2280         int res, rates, i, j;
2281         struct sk_buff *skb;
2282         struct ieee80211_mgmt *mgmt;
2283         struct ieee80211_tx_control control;
2284         struct rate_selection ratesel;
2285         u8 *pos;
2286         struct ieee80211_sub_if_data *sdata;
2287         struct ieee80211_supported_band *sband;
2288
2289         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2290
2291         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2292
2293         /* Remove possible STA entries from other IBSS networks. */
2294         sta_info_flush_delayed(sdata);
2295
2296         if (local->ops->reset_tsf) {
2297                 /* Reset own TSF to allow time synchronization work. */
2298                 local->ops->reset_tsf(local_to_hw(local));
2299         }
2300         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2301         res = ieee80211_if_config(dev);
2302         if (res)
2303                 return res;
2304
2305         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2306
2307         sdata->drop_unencrypted = bss->capability &
2308                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2309
2310         res = ieee80211_set_freq(local, bss->freq);
2311
2312         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2313                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2314                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2315                 return -1;
2316         }
2317
2318         /* Set beacon template */
2319         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2320         do {
2321                 if (!skb)
2322                         break;
2323
2324                 skb_reserve(skb, local->hw.extra_tx_headroom);
2325
2326                 mgmt = (struct ieee80211_mgmt *)
2327                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2328                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2329                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2330                                                    IEEE80211_STYPE_BEACON);
2331                 memset(mgmt->da, 0xff, ETH_ALEN);
2332                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2333                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2334                 mgmt->u.beacon.beacon_int =
2335                         cpu_to_le16(local->hw.conf.beacon_int);
2336                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2337
2338                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2339                 *pos++ = WLAN_EID_SSID;
2340                 *pos++ = ifsta->ssid_len;
2341                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2342
2343                 rates = bss->supp_rates_len;
2344                 if (rates > 8)
2345                         rates = 8;
2346                 pos = skb_put(skb, 2 + rates);
2347                 *pos++ = WLAN_EID_SUPP_RATES;
2348                 *pos++ = rates;
2349                 memcpy(pos, bss->supp_rates, rates);
2350
2351                 if (bss->band == IEEE80211_BAND_2GHZ) {
2352                         pos = skb_put(skb, 2 + 1);
2353                         *pos++ = WLAN_EID_DS_PARAMS;
2354                         *pos++ = 1;
2355                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2356                 }
2357
2358                 pos = skb_put(skb, 2 + 2);
2359                 *pos++ = WLAN_EID_IBSS_PARAMS;
2360                 *pos++ = 2;
2361                 /* FIX: set ATIM window based on scan results */
2362                 *pos++ = 0;
2363                 *pos++ = 0;
2364
2365                 if (bss->supp_rates_len > 8) {
2366                         rates = bss->supp_rates_len - 8;
2367                         pos = skb_put(skb, 2 + rates);
2368                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2369                         *pos++ = rates;
2370                         memcpy(pos, &bss->supp_rates[8], rates);
2371                 }
2372
2373                 memset(&control, 0, sizeof(control));
2374                 rate_control_get_rate(dev, sband, skb, &ratesel);
2375                 if (!ratesel.rate) {
2376                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2377                                "for IBSS beacon\n", dev->name);
2378                         break;
2379                 }
2380                 control.vif = &sdata->vif;
2381                 control.tx_rate = ratesel.rate;
2382                 if (sdata->bss_conf.use_short_preamble &&
2383                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2384                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2385                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2386                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2387                 control.retry_limit = 1;
2388
2389                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2390                 if (ifsta->probe_resp) {
2391                         mgmt = (struct ieee80211_mgmt *)
2392                                 ifsta->probe_resp->data;
2393                         mgmt->frame_control =
2394                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2395                                              IEEE80211_STYPE_PROBE_RESP);
2396                 } else {
2397                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2398                                "template for IBSS\n", dev->name);
2399                 }
2400
2401                 if (local->ops->beacon_update &&
2402                     local->ops->beacon_update(local_to_hw(local),
2403                                              skb, &control) == 0) {
2404                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2405                                "template\n", dev->name);
2406                         skb = NULL;
2407                 }
2408
2409                 rates = 0;
2410                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2411                 for (i = 0; i < bss->supp_rates_len; i++) {
2412                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2413                         for (j = 0; j < sband->n_bitrates; j++)
2414                                 if (sband->bitrates[j].bitrate == bitrate)
2415                                         rates |= BIT(j);
2416                 }
2417                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2418
2419                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2420         } while (0);
2421
2422         if (skb) {
2423                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2424                        "template\n", dev->name);
2425                 dev_kfree_skb(skb);
2426         }
2427
2428         ifsta->state = IEEE80211_IBSS_JOINED;
2429         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2430
2431         ieee80211_rx_bss_put(dev, bss);
2432
2433         return res;
2434 }
2435
2436 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2437                             struct ieee802_11_elems *elems,
2438                             enum ieee80211_band band)
2439 {
2440         struct ieee80211_supported_band *sband;
2441         struct ieee80211_rate *bitrates;
2442         size_t num_rates;
2443         u64 supp_rates;
2444         int i, j;
2445         sband = local->hw.wiphy->bands[band];
2446
2447         if (!sband) {
2448                 WARN_ON(1);
2449                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2450         }
2451
2452         bitrates = sband->bitrates;
2453         num_rates = sband->n_bitrates;
2454         supp_rates = 0;
2455         for (i = 0; i < elems->supp_rates_len +
2456                      elems->ext_supp_rates_len; i++) {
2457                 u8 rate = 0;
2458                 int own_rate;
2459                 if (i < elems->supp_rates_len)
2460                         rate = elems->supp_rates[i];
2461                 else if (elems->ext_supp_rates)
2462                         rate = elems->ext_supp_rates
2463                                 [i - elems->supp_rates_len];
2464                 own_rate = 5 * (rate & 0x7f);
2465                 for (j = 0; j < num_rates; j++)
2466                         if (bitrates[j].bitrate == own_rate)
2467                                 supp_rates |= BIT(j);
2468         }
2469         return supp_rates;
2470 }
2471
2472
2473 static void ieee80211_rx_bss_info(struct net_device *dev,
2474                                   struct ieee80211_mgmt *mgmt,
2475                                   size_t len,
2476                                   struct ieee80211_rx_status *rx_status,
2477                                   int beacon)
2478 {
2479         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2480         struct ieee802_11_elems elems;
2481         size_t baselen;
2482         int freq, clen;
2483         struct ieee80211_sta_bss *bss;
2484         struct sta_info *sta;
2485         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2486         u64 beacon_timestamp, rx_timestamp;
2487         struct ieee80211_channel *channel;
2488         DECLARE_MAC_BUF(mac);
2489         DECLARE_MAC_BUF(mac2);
2490
2491         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2492                 return; /* ignore ProbeResp to foreign address */
2493
2494 #if 0
2495         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2496                dev->name, beacon ? "Beacon" : "Probe Response",
2497                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2498 #endif
2499
2500         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2501         if (baselen > len)
2502                 return;
2503
2504         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2505         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2506
2507         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2508             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2509                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2510                                                 rx_status->band);
2511
2512                 mesh_neighbour_update(mgmt->sa, rates, dev,
2513                                       mesh_peer_accepts_plinks(&elems, dev));
2514         }
2515
2516         rcu_read_lock();
2517
2518         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2519             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2520             (sta = sta_info_get(local, mgmt->sa))) {
2521                 u64 prev_rates;
2522                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2523                                                         rx_status->band);
2524
2525                 prev_rates = sta->supp_rates[rx_status->band];
2526                 sta->supp_rates[rx_status->band] &= supp_rates;
2527                 if (sta->supp_rates[rx_status->band] == 0) {
2528                         /* No matching rates - this should not really happen.
2529                          * Make sure that at least one rate is marked
2530                          * supported to avoid issues with TX rate ctrl. */
2531                         sta->supp_rates[rx_status->band] =
2532                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2533                 }
2534                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2535                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2536                                "%s based on beacon info (0x%llx & 0x%llx -> "
2537                                "0x%llx)\n",
2538                                dev->name, print_mac(mac, sta->addr),
2539                                (unsigned long long) prev_rates,
2540                                (unsigned long long) supp_rates,
2541                                (unsigned long long) sta->supp_rates[rx_status->band]);
2542                 }
2543         }
2544
2545         rcu_read_unlock();
2546
2547         if (elems.ds_params && elems.ds_params_len == 1)
2548                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2549         else
2550                 freq = rx_status->freq;
2551
2552         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2553
2554         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2555                 return;
2556
2557 #ifdef CONFIG_MAC80211_MESH
2558         if (elems.mesh_config)
2559                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2560                                 elems.mesh_id_len, elems.mesh_config, freq);
2561         else
2562 #endif
2563                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2564                                            elems.ssid, elems.ssid_len);
2565         if (!bss) {
2566 #ifdef CONFIG_MAC80211_MESH
2567                 if (elems.mesh_config)
2568                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2569                                 elems.mesh_id_len, elems.mesh_config,
2570                                 elems.mesh_config_len, freq);
2571                 else
2572 #endif
2573                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2574                                                    elems.ssid, elems.ssid_len);
2575                 if (!bss)
2576                         return;
2577         } else {
2578 #if 0
2579                 /* TODO: order by RSSI? */
2580                 spin_lock_bh(&local->sta_bss_lock);
2581                 list_move_tail(&bss->list, &local->sta_bss_list);
2582                 spin_unlock_bh(&local->sta_bss_lock);
2583 #endif
2584         }
2585
2586         /* save the ERP value so that it is available at association time */
2587         if (elems.erp_info && elems.erp_info_len >= 1) {
2588                 bss->erp_value = elems.erp_info[0];
2589                 bss->has_erp_value = 1;
2590         }
2591
2592         if (elems.ht_cap_elem &&
2593              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2594              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2595                 kfree(bss->ht_ie);
2596                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2597                 if (bss->ht_ie) {
2598                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2599                                 elems.ht_cap_elem_len + 2);
2600                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2601                 } else
2602                         bss->ht_ie_len = 0;
2603         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2604                 kfree(bss->ht_ie);
2605                 bss->ht_ie = NULL;
2606                 bss->ht_ie_len = 0;
2607         }
2608
2609         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2610         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2611
2612         bss->supp_rates_len = 0;
2613         if (elems.supp_rates) {
2614                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2615                 if (clen > elems.supp_rates_len)
2616                         clen = elems.supp_rates_len;
2617                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2618                        clen);
2619                 bss->supp_rates_len += clen;
2620         }
2621         if (elems.ext_supp_rates) {
2622                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2623                 if (clen > elems.ext_supp_rates_len)
2624                         clen = elems.ext_supp_rates_len;
2625                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2626                        elems.ext_supp_rates, clen);
2627                 bss->supp_rates_len += clen;
2628         }
2629
2630         bss->band = rx_status->band;
2631
2632         bss->timestamp = beacon_timestamp;
2633         bss->last_update = jiffies;
2634         bss->rssi = rx_status->ssi;
2635         bss->signal = rx_status->signal;
2636         bss->noise = rx_status->noise;
2637         if (!beacon && !bss->probe_resp)
2638                 bss->probe_resp = true;
2639
2640         /*
2641          * In STA mode, the remaining parameters should not be overridden
2642          * by beacons because they're not necessarily accurate there.
2643          */
2644         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2645             bss->probe_resp && beacon) {
2646                 ieee80211_rx_bss_put(dev, bss);
2647                 return;
2648         }
2649
2650         if (elems.wpa &&
2651             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2652              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2653                 kfree(bss->wpa_ie);
2654                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2655                 if (bss->wpa_ie) {
2656                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2657                         bss->wpa_ie_len = elems.wpa_len + 2;
2658                 } else
2659                         bss->wpa_ie_len = 0;
2660         } else if (!elems.wpa && bss->wpa_ie) {
2661                 kfree(bss->wpa_ie);
2662                 bss->wpa_ie = NULL;
2663                 bss->wpa_ie_len = 0;
2664         }
2665
2666         if (elems.rsn &&
2667             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2668              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2669                 kfree(bss->rsn_ie);
2670                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2671                 if (bss->rsn_ie) {
2672                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2673                         bss->rsn_ie_len = elems.rsn_len + 2;
2674                 } else
2675                         bss->rsn_ie_len = 0;
2676         } else if (!elems.rsn && bss->rsn_ie) {
2677                 kfree(bss->rsn_ie);
2678                 bss->rsn_ie = NULL;
2679                 bss->rsn_ie_len = 0;
2680         }
2681
2682         /*
2683          * Cf.
2684          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2685          *
2686          * quoting:
2687          *
2688          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2689          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2690          * Alliance (September 1, 2004) is incorporated by reference herein.
2691          * The inclusion of the WMM Parameters in probe responses and
2692          * association responses is mandatory for WMM enabled networks. The
2693          * inclusion of the WMM Parameters in beacons, however, is optional.
2694          */
2695
2696         if (elems.wmm_param &&
2697             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2698              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2699                 kfree(bss->wmm_ie);
2700                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2701                 if (bss->wmm_ie) {
2702                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2703                                elems.wmm_param_len + 2);
2704                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2705                 } else
2706                         bss->wmm_ie_len = 0;
2707         } else if (elems.wmm_info &&
2708                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2709                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2710                  /* As for certain AP's Fifth bit is not set in WMM IE in
2711                   * beacon frames.So while parsing the beacon frame the
2712                   * wmm_info structure is used instead of wmm_param.
2713                   * wmm_info structure was never used to set bss->wmm_ie.
2714                   * This code fixes this problem by copying the WME
2715                   * information from wmm_info to bss->wmm_ie and enabling
2716                   * n-band association.
2717                   */
2718                 kfree(bss->wmm_ie);
2719                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2720                 if (bss->wmm_ie) {
2721                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2722                                elems.wmm_info_len + 2);
2723                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2724                 } else
2725                         bss->wmm_ie_len = 0;
2726         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2727                 kfree(bss->wmm_ie);
2728                 bss->wmm_ie = NULL;
2729                 bss->wmm_ie_len = 0;
2730         }
2731
2732         /* check if we need to merge IBSS */
2733         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2734             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2735             bss->capability & WLAN_CAPABILITY_IBSS &&
2736             bss->freq == local->oper_channel->center_freq &&
2737             elems.ssid_len == sdata->u.sta.ssid_len &&
2738             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2739                 if (rx_status->flag & RX_FLAG_TSFT) {
2740                         /* in order for correct IBSS merging we need mactime
2741                          *
2742                          * since mactime is defined as the time the first data
2743                          * symbol of the frame hits the PHY, and the timestamp
2744                          * of the beacon is defined as "the time that the data
2745                          * symbol containing the first bit of the timestamp is
2746                          * transmitted to the PHY plus the transmitting STA’s
2747                          * delays through its local PHY from the MAC-PHY
2748                          * interface to its interface with the WM"
2749                          * (802.11 11.1.2) - equals the time this bit arrives at
2750                          * the receiver - we have to take into account the
2751                          * offset between the two.
2752                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2753                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2754                          */
2755                         int rate = local->hw.wiphy->bands[rx_status->band]->
2756                                         bitrates[rx_status->rate_idx].bitrate;
2757                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2758                 } else if (local && local->ops && local->ops->get_tsf)
2759                         /* second best option: get current TSF */
2760                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2761                 else
2762                         /* can't merge without knowing the TSF */
2763                         rx_timestamp = -1LLU;
2764 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2765                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2766                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2767                        print_mac(mac, mgmt->sa),
2768                        print_mac(mac2, mgmt->bssid),
2769                        (unsigned long long)rx_timestamp,
2770                        (unsigned long long)beacon_timestamp,
2771                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2772                        jiffies);
2773 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2774                 if (beacon_timestamp > rx_timestamp) {
2775 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2776                         if (net_ratelimit())
2777 #endif
2778                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2779                                        "local TSF - IBSS merge with BSSID %s\n",
2780                                        dev->name, print_mac(mac, mgmt->bssid));
2781                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2782                         ieee80211_ibss_add_sta(dev, NULL,
2783                                                mgmt->bssid, mgmt->sa);
2784                 }
2785         }
2786
2787         ieee80211_rx_bss_put(dev, bss);
2788 }
2789
2790
2791 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2792                                          struct ieee80211_mgmt *mgmt,
2793                                          size_t len,
2794                                          struct ieee80211_rx_status *rx_status)
2795 {
2796         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2797 }
2798
2799
2800 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2801                                      struct ieee80211_mgmt *mgmt,
2802                                      size_t len,
2803                                      struct ieee80211_rx_status *rx_status)
2804 {
2805         struct ieee80211_sub_if_data *sdata;
2806         struct ieee80211_if_sta *ifsta;
2807         size_t baselen;
2808         struct ieee802_11_elems elems;
2809         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2810         struct ieee80211_conf *conf = &local->hw.conf;
2811         u32 changed = 0;
2812
2813         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2814
2815         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2816         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2817                 return;
2818         ifsta = &sdata->u.sta;
2819
2820         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2821             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2822                 return;
2823
2824         /* Process beacon from the current BSS */
2825         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2826         if (baselen > len)
2827                 return;
2828
2829         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2830
2831         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2832                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2833                                          elems.wmm_param_len);
2834         }
2835
2836         /* Do not send changes to driver if we are scanning. This removes
2837          * requirement that driver's bss_info_changed function needs to be
2838          * atomic. */
2839         if (local->sta_sw_scanning || local->sta_hw_scanning)
2840                 return;
2841
2842         if (elems.erp_info && elems.erp_info_len >= 1)
2843                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2844         else {
2845                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2846                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2847                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2848         }
2849
2850         if (elems.ht_cap_elem && elems.ht_info_elem &&
2851             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2852                 struct ieee80211_ht_bss_info bss_info;
2853
2854                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2855                                 (struct ieee80211_ht_addt_info *)
2856                                 elems.ht_info_elem, &bss_info);
2857                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2858                                                &bss_info);
2859         }
2860
2861         ieee80211_bss_info_change_notify(sdata, changed);
2862 }
2863
2864
2865 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2866                                         struct ieee80211_if_sta *ifsta,
2867                                         struct ieee80211_mgmt *mgmt,
2868                                         size_t len,
2869                                         struct ieee80211_rx_status *rx_status)
2870 {
2871         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2872         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2873         int tx_last_beacon;
2874         struct sk_buff *skb;
2875         struct ieee80211_mgmt *resp;
2876         u8 *pos, *end;
2877         DECLARE_MAC_BUF(mac);
2878 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2879         DECLARE_MAC_BUF(mac2);
2880         DECLARE_MAC_BUF(mac3);
2881 #endif
2882
2883         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2884             ifsta->state != IEEE80211_IBSS_JOINED ||
2885             len < 24 + 2 || !ifsta->probe_resp)
2886                 return;
2887
2888         if (local->ops->tx_last_beacon)
2889                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2890         else
2891                 tx_last_beacon = 1;
2892
2893 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2894         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2895                "%s (tx_last_beacon=%d)\n",
2896                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2897                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2898 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2899
2900         if (!tx_last_beacon)
2901                 return;
2902
2903         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2904             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2905                 return;
2906
2907         end = ((u8 *) mgmt) + len;
2908         pos = mgmt->u.probe_req.variable;
2909         if (pos[0] != WLAN_EID_SSID ||
2910             pos + 2 + pos[1] > end) {
2911                 if (net_ratelimit()) {
2912                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2913                                "from %s\n",
2914                                dev->name, print_mac(mac, mgmt->sa));
2915                 }
2916                 return;
2917         }
2918         if (pos[1] != 0 &&
2919             (pos[1] != ifsta->ssid_len ||
2920              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2921                 /* Ignore ProbeReq for foreign SSID */
2922                 return;
2923         }
2924
2925         /* Reply with ProbeResp */
2926         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2927         if (!skb)
2928                 return;
2929
2930         resp = (struct ieee80211_mgmt *) skb->data;
2931         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2932 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2933         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2934                dev->name, print_mac(mac, resp->da));
2935 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2936         ieee80211_sta_tx(dev, skb, 0);
2937 }
2938
2939 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2940                                      struct ieee80211_if_sta *ifsta,
2941                                      struct ieee80211_mgmt *mgmt,
2942                                      size_t len,
2943                                      struct ieee80211_rx_status *rx_status)
2944 {
2945         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2946
2947         if (len < IEEE80211_MIN_ACTION_SIZE)
2948                 return;
2949
2950         switch (mgmt->u.action.category) {
2951         case WLAN_CATEGORY_BACK:
2952                 switch (mgmt->u.action.u.addba_req.action_code) {
2953                 case WLAN_ACTION_ADDBA_REQ:
2954                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2955                                    sizeof(mgmt->u.action.u.addba_req)))
2956                                 break;
2957                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2958                         break;
2959                 case WLAN_ACTION_ADDBA_RESP:
2960                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2961                                    sizeof(mgmt->u.action.u.addba_resp)))
2962                                 break;
2963                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2964                         break;
2965                 case WLAN_ACTION_DELBA:
2966                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2967                                    sizeof(mgmt->u.action.u.delba)))
2968                                 break;
2969                         ieee80211_sta_process_delba(dev, mgmt, len);
2970                         break;
2971                 default:
2972                         if (net_ratelimit())
2973                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2974                                         dev->name);
2975                         break;
2976                 }
2977                 break;
2978         case PLINK_CATEGORY:
2979                 if (ieee80211_vif_is_mesh(&sdata->vif))
2980                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2981                 break;
2982         case MESH_PATH_SEL_CATEGORY:
2983                 if (ieee80211_vif_is_mesh(&sdata->vif))
2984                         mesh_rx_path_sel_frame(dev, mgmt, len);
2985                 break;
2986         default:
2987                 if (net_ratelimit())
2988                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
2989                         "category=%d\n", dev->name, mgmt->u.action.category);
2990                 break;
2991         }
2992 }
2993
2994 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2995                            struct ieee80211_rx_status *rx_status)
2996 {
2997         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2998         struct ieee80211_sub_if_data *sdata;
2999         struct ieee80211_if_sta *ifsta;
3000         struct ieee80211_mgmt *mgmt;
3001         u16 fc;
3002
3003         if (skb->len < 24)
3004                 goto fail;
3005
3006         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3007         ifsta = &sdata->u.sta;
3008
3009         mgmt = (struct ieee80211_mgmt *) skb->data;
3010         fc = le16_to_cpu(mgmt->frame_control);
3011
3012         switch (fc & IEEE80211_FCTL_STYPE) {
3013         case IEEE80211_STYPE_PROBE_REQ:
3014         case IEEE80211_STYPE_PROBE_RESP:
3015         case IEEE80211_STYPE_BEACON:
3016         case IEEE80211_STYPE_ACTION:
3017                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3018         case IEEE80211_STYPE_AUTH:
3019         case IEEE80211_STYPE_ASSOC_RESP:
3020         case IEEE80211_STYPE_REASSOC_RESP:
3021         case IEEE80211_STYPE_DEAUTH:
3022         case IEEE80211_STYPE_DISASSOC:
3023                 skb_queue_tail(&ifsta->skb_queue, skb);
3024                 queue_work(local->hw.workqueue, &ifsta->work);
3025                 return;
3026         default:
3027                 printk(KERN_DEBUG "%s: received unknown management frame - "
3028                        "stype=%d\n", dev->name,
3029                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3030                 break;
3031         }
3032
3033  fail:
3034         kfree_skb(skb);
3035 }
3036
3037
3038 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3039                                          struct sk_buff *skb)
3040 {
3041         struct ieee80211_rx_status *rx_status;
3042         struct ieee80211_sub_if_data *sdata;
3043         struct ieee80211_if_sta *ifsta;
3044         struct ieee80211_mgmt *mgmt;
3045         u16 fc;
3046
3047         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3048         ifsta = &sdata->u.sta;
3049
3050         rx_status = (struct ieee80211_rx_status *) skb->cb;
3051         mgmt = (struct ieee80211_mgmt *) skb->data;
3052         fc = le16_to_cpu(mgmt->frame_control);
3053
3054         switch (fc & IEEE80211_FCTL_STYPE) {
3055         case IEEE80211_STYPE_PROBE_REQ:
3056                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3057                                             rx_status);
3058                 break;
3059         case IEEE80211_STYPE_PROBE_RESP:
3060                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3061                 break;
3062         case IEEE80211_STYPE_BEACON:
3063                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3064                 break;
3065         case IEEE80211_STYPE_AUTH:
3066                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3067                 break;
3068         case IEEE80211_STYPE_ASSOC_RESP:
3069                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3070                 break;
3071         case IEEE80211_STYPE_REASSOC_RESP:
3072                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3073                 break;
3074         case IEEE80211_STYPE_DEAUTH:
3075                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3076                 break;
3077         case IEEE80211_STYPE_DISASSOC:
3078                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3079                 break;
3080         case IEEE80211_STYPE_ACTION:
3081                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3082                 break;
3083         }
3084
3085         kfree_skb(skb);
3086 }
3087
3088
3089 ieee80211_rx_result
3090 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3091                       struct ieee80211_rx_status *rx_status)
3092 {
3093         struct ieee80211_mgmt *mgmt;
3094         u16 fc;
3095
3096         if (skb->len < 2)
3097                 return RX_DROP_UNUSABLE;
3098
3099         mgmt = (struct ieee80211_mgmt *) skb->data;
3100         fc = le16_to_cpu(mgmt->frame_control);
3101
3102         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3103                 return RX_CONTINUE;
3104
3105         if (skb->len < 24)
3106                 return RX_DROP_MONITOR;
3107
3108         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3109                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3110                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3111                                                      skb->len, rx_status);
3112                         dev_kfree_skb(skb);
3113                         return RX_QUEUED;
3114                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3115                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3116                                                  rx_status);
3117                         dev_kfree_skb(skb);
3118                         return RX_QUEUED;
3119                 }
3120         }
3121         return RX_CONTINUE;
3122 }
3123
3124
3125 static int ieee80211_sta_active_ibss(struct net_device *dev)
3126 {
3127         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3128         int active = 0;
3129         struct sta_info *sta;
3130         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3131
3132         rcu_read_lock();
3133
3134         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3135                 if (sta->sdata == sdata &&
3136                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3137                                jiffies)) {
3138                         active++;
3139                         break;
3140                 }
3141         }
3142
3143         rcu_read_unlock();
3144
3145         return active;
3146 }
3147
3148
3149 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3150 {
3151         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3152         struct sta_info *sta, *tmp;
3153         LIST_HEAD(tmp_list);
3154         DECLARE_MAC_BUF(mac);
3155         unsigned long flags;
3156
3157         spin_lock_irqsave(&local->sta_lock, flags);
3158         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3159                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3160                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3161                                dev->name, print_mac(mac, sta->addr));
3162                         __sta_info_unlink(&sta);
3163                         if (sta)
3164                                 list_add(&sta->list, &tmp_list);
3165                 }
3166         spin_unlock_irqrestore(&local->sta_lock, flags);
3167
3168         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3169                 sta_info_destroy(sta);
3170 }
3171
3172
3173 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3174                                      struct ieee80211_if_sta *ifsta)
3175 {
3176         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3177
3178         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3179         if (ieee80211_sta_active_ibss(dev))
3180                 return;
3181
3182         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3183                "IBSS networks with same SSID (merge)\n", dev->name);
3184         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3185 }
3186
3187
3188 #ifdef CONFIG_MAC80211_MESH
3189 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3190                            struct ieee80211_if_sta *ifsta)
3191 {
3192         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3193         bool free_plinks;
3194
3195         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3196         mesh_path_expire(dev);
3197
3198         free_plinks = mesh_plink_availables(sdata);
3199         if (free_plinks != sdata->u.sta.accepting_plinks)
3200                 ieee80211_if_config_beacon(dev);
3201
3202         mod_timer(&ifsta->timer, jiffies +
3203                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3204 }
3205
3206
3207 void ieee80211_start_mesh(struct net_device *dev)
3208 {
3209         struct ieee80211_if_sta *ifsta;
3210         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3211         ifsta = &sdata->u.sta;
3212         ifsta->state = IEEE80211_MESH_UP;
3213         ieee80211_sta_timer((unsigned long)sdata);
3214 }
3215 #endif
3216
3217
3218 void ieee80211_sta_timer(unsigned long data)
3219 {
3220         struct ieee80211_sub_if_data *sdata =
3221                 (struct ieee80211_sub_if_data *) data;
3222         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3223         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3224
3225         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3226         queue_work(local->hw.workqueue, &ifsta->work);
3227 }
3228
3229 void ieee80211_sta_work(struct work_struct *work)
3230 {
3231         struct ieee80211_sub_if_data *sdata =
3232                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3233         struct net_device *dev = sdata->dev;
3234         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3235         struct ieee80211_if_sta *ifsta;
3236         struct sk_buff *skb;
3237
3238         if (!netif_running(dev))
3239                 return;
3240
3241         if (local->sta_sw_scanning || local->sta_hw_scanning)
3242                 return;
3243
3244         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3245             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3246             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3247                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3248                        "(type=%d)\n", dev->name, sdata->vif.type);
3249                 return;
3250         }
3251         ifsta = &sdata->u.sta;
3252
3253         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3254                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3255
3256 #ifdef CONFIG_MAC80211_MESH
3257         if (ifsta->preq_queue_len &&
3258             time_after(jiffies,
3259                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3260                 mesh_path_start_discovery(dev);
3261 #endif
3262
3263         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3264             ifsta->state != IEEE80211_ASSOCIATE &&
3265             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3266                 if (ifsta->scan_ssid_len)
3267                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3268                 else
3269                         ieee80211_sta_start_scan(dev, NULL, 0);
3270                 return;
3271         }
3272
3273         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3274                 if (ieee80211_sta_config_auth(dev, ifsta))
3275                         return;
3276                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3277         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3278                 return;
3279
3280         switch (ifsta->state) {
3281         case IEEE80211_DISABLED:
3282                 break;
3283         case IEEE80211_AUTHENTICATE:
3284                 ieee80211_authenticate(dev, ifsta);
3285                 break;
3286         case IEEE80211_ASSOCIATE:
3287                 ieee80211_associate(dev, ifsta);
3288                 break;
3289         case IEEE80211_ASSOCIATED:
3290                 ieee80211_associated(dev, ifsta);
3291                 break;
3292         case IEEE80211_IBSS_SEARCH:
3293                 ieee80211_sta_find_ibss(dev, ifsta);
3294                 break;
3295         case IEEE80211_IBSS_JOINED:
3296                 ieee80211_sta_merge_ibss(dev, ifsta);
3297                 break;
3298 #ifdef CONFIG_MAC80211_MESH
3299         case IEEE80211_MESH_UP:
3300                 ieee80211_mesh_housekeeping(dev, ifsta);
3301                 break;
3302 #endif
3303         default:
3304                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3305                        ifsta->state);
3306                 break;
3307         }
3308
3309         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3310                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3311                        "mixed-cell disabled - disassociate\n", dev->name);
3312
3313                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3314                 ieee80211_set_disassoc(dev, ifsta, 0);
3315         }
3316 }
3317
3318
3319 static void ieee80211_sta_reset_auth(struct net_device *dev,
3320                                      struct ieee80211_if_sta *ifsta)
3321 {
3322         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3323
3324         if (local->ops->reset_tsf) {
3325                 /* Reset own TSF to allow time synchronization work. */
3326                 local->ops->reset_tsf(local_to_hw(local));
3327         }
3328
3329         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3330
3331
3332         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3333                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3334         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3335                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3336         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3337                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3338         else
3339                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3340         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3341                ifsta->auth_alg);
3342         ifsta->auth_transaction = -1;
3343         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3344         ifsta->auth_tries = ifsta->assoc_tries = 0;
3345         netif_carrier_off(dev);
3346 }
3347
3348
3349 void ieee80211_sta_req_auth(struct net_device *dev,
3350                             struct ieee80211_if_sta *ifsta)
3351 {
3352         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3353         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3354
3355         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3356                 return;
3357
3358         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3359                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3360             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3361                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3362                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3363                 queue_work(local->hw.workqueue, &ifsta->work);
3364         }
3365 }
3366
3367 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3368                                     const char *ssid, int ssid_len)
3369 {
3370         int tmp, hidden_ssid;
3371
3372         if (ssid_len == ifsta->ssid_len &&
3373             !memcmp(ifsta->ssid, ssid, ssid_len))
3374                 return 1;
3375
3376         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3377                 return 0;
3378
3379         hidden_ssid = 1;
3380         tmp = ssid_len;
3381         while (tmp--) {
3382                 if (ssid[tmp] != '\0') {
3383                         hidden_ssid = 0;
3384                         break;
3385                 }
3386         }
3387
3388         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3389                 return 1;
3390
3391         if (ssid_len == 1 && ssid[0] == ' ')
3392                 return 1;
3393
3394         return 0;
3395 }
3396
3397 static int ieee80211_sta_config_auth(struct net_device *dev,
3398                                      struct ieee80211_if_sta *ifsta)
3399 {
3400         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3401         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3402         struct ieee80211_sta_bss *bss, *selected = NULL;
3403         int top_rssi = 0, freq;
3404
3405         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3406             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3407                 ifsta->state = IEEE80211_AUTHENTICATE;
3408                 ieee80211_sta_reset_auth(dev, ifsta);
3409                 return 0;
3410         }
3411
3412         spin_lock_bh(&local->sta_bss_lock);
3413         freq = local->oper_channel->center_freq;
3414         list_for_each_entry(bss, &local->sta_bss_list, list) {
3415                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3416                         continue;
3417
3418                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3419                     !!sdata->default_key)
3420                         continue;
3421
3422                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3423                     bss->freq != freq)
3424                         continue;
3425
3426                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3427                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3428                         continue;
3429
3430                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3431                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3432                         continue;
3433
3434                 if (!selected || top_rssi < bss->rssi) {
3435                         selected = bss;
3436                         top_rssi = bss->rssi;
3437                 }
3438         }
3439         if (selected)
3440                 atomic_inc(&selected->users);
3441         spin_unlock_bh(&local->sta_bss_lock);
3442
3443         if (selected) {
3444                 ieee80211_set_freq(local, selected->freq);
3445                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3446                         ieee80211_sta_set_ssid(dev, selected->ssid,
3447                                                selected->ssid_len);
3448                 ieee80211_sta_set_bssid(dev, selected->bssid);
3449                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3450                 ieee80211_rx_bss_put(dev, selected);
3451                 ifsta->state = IEEE80211_AUTHENTICATE;
3452                 ieee80211_sta_reset_auth(dev, ifsta);
3453                 return 0;
3454         } else {
3455                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3456                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3457                                 ieee80211_sta_start_scan(dev, NULL, 0);
3458                         else
3459                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3460                                                          ifsta->ssid_len);
3461                         ifsta->state = IEEE80211_AUTHENTICATE;
3462                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3463                 } else
3464                         ifsta->state = IEEE80211_DISABLED;
3465         }
3466         return -1;
3467 }
3468
3469
3470 static int ieee80211_sta_create_ibss(struct net_device *dev,
3471                                      struct ieee80211_if_sta *ifsta)
3472 {
3473         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3474         struct ieee80211_sta_bss *bss;
3475         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3476         struct ieee80211_supported_band *sband;
3477         u8 bssid[ETH_ALEN], *pos;
3478         int i;
3479         DECLARE_MAC_BUF(mac);
3480
3481 #if 0
3482         /* Easier testing, use fixed BSSID. */
3483         memset(bssid, 0xfe, ETH_ALEN);
3484 #else
3485         /* Generate random, not broadcast, locally administered BSSID. Mix in
3486          * own MAC address to make sure that devices that do not have proper
3487          * random number generator get different BSSID. */
3488         get_random_bytes(bssid, ETH_ALEN);
3489         for (i = 0; i < ETH_ALEN; i++)
3490                 bssid[i] ^= dev->dev_addr[i];
3491         bssid[0] &= ~0x01;
3492         bssid[0] |= 0x02;
3493 #endif
3494
3495         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3496                dev->name, print_mac(mac, bssid));
3497
3498         bss = ieee80211_rx_bss_add(dev, bssid,
3499                                    local->hw.conf.channel->center_freq,
3500                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3501         if (!bss)
3502                 return -ENOMEM;
3503
3504         bss->band = local->hw.conf.channel->band;
3505         sband = local->hw.wiphy->bands[bss->band];
3506
3507         if (local->hw.conf.beacon_int == 0)
3508                 local->hw.conf.beacon_int = 10000;
3509         bss->beacon_int = local->hw.conf.beacon_int;
3510         bss->last_update = jiffies;
3511         bss->capability = WLAN_CAPABILITY_IBSS;
3512
3513         if (sdata->default_key)
3514                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3515         else
3516                 sdata->drop_unencrypted = 0;
3517
3518         bss->supp_rates_len = sband->n_bitrates;
3519         pos = bss->supp_rates;
3520         for (i = 0; i < sband->n_bitrates; i++) {
3521                 int rate = sband->bitrates[i].bitrate;
3522                 *pos++ = (u8) (rate / 5);
3523         }
3524
3525         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3526 }
3527
3528
3529 static int ieee80211_sta_find_ibss(struct net_device *dev,
3530                                    struct ieee80211_if_sta *ifsta)
3531 {
3532         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3533         struct ieee80211_sta_bss *bss;
3534         int found = 0;
3535         u8 bssid[ETH_ALEN];
3536         int active_ibss;
3537         DECLARE_MAC_BUF(mac);
3538         DECLARE_MAC_BUF(mac2);
3539
3540         if (ifsta->ssid_len == 0)
3541                 return -EINVAL;
3542
3543         active_ibss = ieee80211_sta_active_ibss(dev);
3544 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3545         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3546                dev->name, active_ibss);
3547 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3548         spin_lock_bh(&local->sta_bss_lock);
3549         list_for_each_entry(bss, &local->sta_bss_list, list) {
3550                 if (ifsta->ssid_len != bss->ssid_len ||
3551                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3552                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3553                         continue;
3554 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3555                 printk(KERN_DEBUG "   bssid=%s found\n",
3556                        print_mac(mac, bss->bssid));
3557 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3558                 memcpy(bssid, bss->bssid, ETH_ALEN);
3559                 found = 1;
3560                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3561                         break;
3562         }
3563         spin_unlock_bh(&local->sta_bss_lock);
3564
3565 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3566         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3567                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3568 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3569         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3570             (bss = ieee80211_rx_bss_get(dev, bssid,
3571                                         local->hw.conf.channel->center_freq,
3572                                         ifsta->ssid, ifsta->ssid_len))) {
3573                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3574                        " based on configured SSID\n",
3575                        dev->name, print_mac(mac, bssid));
3576                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3577         }
3578 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3579         printk(KERN_DEBUG "   did not try to join ibss\n");
3580 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3581
3582         /* Selected IBSS not found in current scan results - try to scan */
3583         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3584             !ieee80211_sta_active_ibss(dev)) {
3585                 mod_timer(&ifsta->timer, jiffies +
3586                                       IEEE80211_IBSS_MERGE_INTERVAL);
3587         } else if (time_after(jiffies, local->last_scan_completed +
3588                               IEEE80211_SCAN_INTERVAL)) {
3589                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3590                        "join\n", dev->name);
3591                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3592                                               ifsta->ssid_len);
3593         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3594                 int interval = IEEE80211_SCAN_INTERVAL;
3595
3596                 if (time_after(jiffies, ifsta->ibss_join_req +
3597                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3598                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3599                             (!(local->oper_channel->flags &
3600                                         IEEE80211_CHAN_NO_IBSS)))
3601                                 return ieee80211_sta_create_ibss(dev, ifsta);
3602                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3603                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3604                                        " %d MHz\n", dev->name,
3605                                        local->hw.conf.channel->center_freq);
3606                         }
3607
3608                         /* No IBSS found - decrease scan interval and continue
3609                          * scanning. */
3610                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3611                 }
3612
3613                 ifsta->state = IEEE80211_IBSS_SEARCH;
3614                 mod_timer(&ifsta->timer, jiffies + interval);
3615                 return 0;
3616         }
3617
3618         return 0;
3619 }
3620
3621
3622 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3623 {
3624         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3625         struct ieee80211_if_sta *ifsta;
3626
3627         if (len > IEEE80211_MAX_SSID_LEN)
3628                 return -EINVAL;
3629
3630         ifsta = &sdata->u.sta;
3631
3632         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3633                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3634         memcpy(ifsta->ssid, ssid, len);
3635         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3636         ifsta->ssid_len = len;
3637
3638         if (len)
3639                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3640         else
3641                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3642         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3643             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3644                 ifsta->ibss_join_req = jiffies;
3645                 ifsta->state = IEEE80211_IBSS_SEARCH;
3646                 return ieee80211_sta_find_ibss(dev, ifsta);
3647         }
3648         return 0;
3649 }
3650
3651
3652 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3653 {
3654         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3655         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3656         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3657         *len = ifsta->ssid_len;
3658         return 0;
3659 }
3660
3661
3662 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3663 {
3664         struct ieee80211_sub_if_data *sdata;
3665         struct ieee80211_if_sta *ifsta;
3666         int res;
3667
3668         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3669         ifsta = &sdata->u.sta;
3670
3671         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3672                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3673                 res = ieee80211_if_config(dev);
3674                 if (res) {
3675                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3676                                "the low-level driver\n", dev->name);
3677                         return res;
3678                 }
3679         }
3680
3681         if (is_valid_ether_addr(bssid))
3682                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3683         else
3684                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3685
3686         return 0;
3687 }
3688
3689
3690 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3691                                     struct ieee80211_sub_if_data *sdata,
3692                                     int powersave)
3693 {
3694         struct sk_buff *skb;
3695         struct ieee80211_hdr *nullfunc;
3696         u16 fc;
3697
3698         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3699         if (!skb) {
3700                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3701                        "frame\n", sdata->dev->name);
3702                 return;
3703         }
3704         skb_reserve(skb, local->hw.extra_tx_headroom);
3705
3706         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3707         memset(nullfunc, 0, 24);
3708         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3709              IEEE80211_FCTL_TODS;
3710         if (powersave)
3711                 fc |= IEEE80211_FCTL_PM;
3712         nullfunc->frame_control = cpu_to_le16(fc);
3713         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3714         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3715         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3716
3717         ieee80211_sta_tx(sdata->dev, skb, 0);
3718 }
3719
3720
3721 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3722 {
3723         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3724             ieee80211_vif_is_mesh(&sdata->vif))
3725                 ieee80211_sta_timer((unsigned long)sdata);
3726 }
3727
3728 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3729 {
3730         struct ieee80211_local *local = hw_to_local(hw);
3731         struct net_device *dev = local->scan_dev;
3732         struct ieee80211_sub_if_data *sdata;
3733         union iwreq_data wrqu;
3734
3735         local->last_scan_completed = jiffies;
3736         memset(&wrqu, 0, sizeof(wrqu));
3737         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3738
3739         if (local->sta_hw_scanning) {
3740                 local->sta_hw_scanning = 0;
3741                 if (ieee80211_hw_config(local))
3742                         printk(KERN_DEBUG "%s: failed to restore operational "
3743                                "channel after scan\n", dev->name);
3744                 /* Restart STA timer for HW scan case */
3745                 rcu_read_lock();
3746                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3747                         ieee80211_restart_sta_timer(sdata);
3748                 rcu_read_unlock();
3749
3750                 goto done;
3751         }
3752
3753         local->sta_sw_scanning = 0;
3754         if (ieee80211_hw_config(local))
3755                 printk(KERN_DEBUG "%s: failed to restore operational "
3756                        "channel after scan\n", dev->name);
3757
3758
3759         netif_tx_lock_bh(local->mdev);
3760         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3761         local->ops->configure_filter(local_to_hw(local),
3762                                      FIF_BCN_PRBRESP_PROMISC,
3763                                      &local->filter_flags,
3764                                      local->mdev->mc_count,
3765                                      local->mdev->mc_list);
3766
3767         netif_tx_unlock_bh(local->mdev);
3768
3769         rcu_read_lock();
3770         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3771
3772                 /* No need to wake the master device. */
3773                 if (sdata->dev == local->mdev)
3774                         continue;
3775
3776                 /* Tell AP we're back */
3777                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3778                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3779                         ieee80211_send_nullfunc(local, sdata, 0);
3780
3781                 ieee80211_restart_sta_timer(sdata);
3782
3783                 netif_wake_queue(sdata->dev);
3784         }
3785         rcu_read_unlock();
3786
3787 done:
3788         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3789         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3790                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3791                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3792                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3793                     !ieee80211_sta_active_ibss(dev)))
3794                         ieee80211_sta_find_ibss(dev, ifsta);
3795         }
3796 }
3797 EXPORT_SYMBOL(ieee80211_scan_completed);
3798
3799 void ieee80211_sta_scan_work(struct work_struct *work)
3800 {
3801         struct ieee80211_local *local =
3802                 container_of(work, struct ieee80211_local, scan_work.work);
3803         struct net_device *dev = local->scan_dev;
3804         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3805         struct ieee80211_supported_band *sband;
3806         struct ieee80211_channel *chan;
3807         int skip;
3808         unsigned long next_delay = 0;
3809
3810         if (!local->sta_sw_scanning)
3811                 return;
3812
3813         switch (local->scan_state) {
3814         case SCAN_SET_CHANNEL:
3815                 /*
3816                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3817                  * after we successfully scanned the last channel of the last
3818                  * band (and the last band is supported by the hw)
3819                  */
3820                 if (local->scan_band < IEEE80211_NUM_BANDS)
3821                         sband = local->hw.wiphy->bands[local->scan_band];
3822                 else
3823                         sband = NULL;
3824
3825                 /*
3826                  * If we are at an unsupported band and have more bands
3827                  * left to scan, advance to the next supported one.
3828                  */
3829                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3830                         local->scan_band++;
3831                         sband = local->hw.wiphy->bands[local->scan_band];
3832                         local->scan_channel_idx = 0;
3833                 }
3834
3835                 /* if no more bands/channels left, complete scan */
3836                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3837                         ieee80211_scan_completed(local_to_hw(local));
3838                         return;
3839                 }
3840                 skip = 0;
3841                 chan = &sband->channels[local->scan_channel_idx];
3842
3843                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3844                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3845                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3846                         skip = 1;
3847
3848                 if (!skip) {
3849                         local->scan_channel = chan;
3850                         if (ieee80211_hw_config(local)) {
3851                                 printk(KERN_DEBUG "%s: failed to set freq to "
3852                                        "%d MHz for scan\n", dev->name,
3853                                        chan->center_freq);
3854                                 skip = 1;
3855                         }
3856                 }
3857
3858                 /* advance state machine to next channel/band */
3859                 local->scan_channel_idx++;
3860                 if (local->scan_channel_idx >= sband->n_channels) {
3861                         /*
3862                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3863                          * we'll catch that case above and complete the scan
3864                          * if that is the case.
3865                          */
3866                         local->scan_band++;
3867                         local->scan_channel_idx = 0;
3868                 }
3869
3870                 if (skip)
3871                         break;
3872
3873                 next_delay = IEEE80211_PROBE_DELAY +
3874                              usecs_to_jiffies(local->hw.channel_change_time);
3875                 local->scan_state = SCAN_SEND_PROBE;
3876                 break;
3877         case SCAN_SEND_PROBE:
3878                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3879                 local->scan_state = SCAN_SET_CHANNEL;
3880
3881                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3882                         break;
3883                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3884                                          local->scan_ssid_len);
3885                 next_delay = IEEE80211_CHANNEL_TIME;
3886                 break;
3887         }
3888
3889         if (local->sta_sw_scanning)
3890                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3891                                    next_delay);
3892 }
3893
3894
3895 static int ieee80211_sta_start_scan(struct net_device *dev,
3896                                     u8 *ssid, size_t ssid_len)
3897 {
3898         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3899         struct ieee80211_sub_if_data *sdata;
3900
3901         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3902                 return -EINVAL;
3903
3904         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3905          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3906          * BSSID: MACAddress
3907          * SSID
3908          * ScanType: ACTIVE, PASSIVE
3909          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3910          *    a Probe frame during active scanning
3911          * ChannelList
3912          * MinChannelTime (>= ProbeDelay), in TU
3913          * MaxChannelTime: (>= MinChannelTime), in TU
3914          */
3915
3916          /* MLME-SCAN.confirm
3917           * BSSDescriptionSet
3918           * ResultCode: SUCCESS, INVALID_PARAMETERS
3919          */
3920
3921         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3922                 if (local->scan_dev == dev)
3923                         return 0;
3924                 return -EBUSY;
3925         }
3926
3927         if (local->ops->hw_scan) {
3928                 int rc = local->ops->hw_scan(local_to_hw(local),
3929                                              ssid, ssid_len);
3930                 if (!rc) {
3931                         local->sta_hw_scanning = 1;
3932                         local->scan_dev = dev;
3933                 }
3934                 return rc;
3935         }
3936
3937         local->sta_sw_scanning = 1;
3938
3939         rcu_read_lock();
3940         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3941
3942                 /* Don't stop the master interface, otherwise we can't transmit
3943                  * probes! */
3944                 if (sdata->dev == local->mdev)
3945                         continue;
3946
3947                 netif_stop_queue(sdata->dev);
3948                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3949                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3950                         ieee80211_send_nullfunc(local, sdata, 1);
3951         }
3952         rcu_read_unlock();
3953
3954         if (ssid) {
3955                 local->scan_ssid_len = ssid_len;
3956                 memcpy(local->scan_ssid, ssid, ssid_len);
3957         } else
3958                 local->scan_ssid_len = 0;
3959         local->scan_state = SCAN_SET_CHANNEL;
3960         local->scan_channel_idx = 0;
3961         local->scan_band = IEEE80211_BAND_2GHZ;
3962         local->scan_dev = dev;
3963
3964         netif_tx_lock_bh(local->mdev);
3965         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3966         local->ops->configure_filter(local_to_hw(local),
3967                                      FIF_BCN_PRBRESP_PROMISC,
3968                                      &local->filter_flags,
3969                                      local->mdev->mc_count,
3970                                      local->mdev->mc_list);
3971         netif_tx_unlock_bh(local->mdev);
3972
3973         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3974         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3975                            IEEE80211_CHANNEL_TIME);
3976
3977         return 0;
3978 }
3979
3980
3981 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3982 {
3983         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3984         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3985         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3986
3987         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3988                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3989
3990         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3991                 if (local->scan_dev == dev)
3992                         return 0;
3993                 return -EBUSY;
3994         }
3995
3996         ifsta->scan_ssid_len = ssid_len;
3997         if (ssid_len)
3998                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3999         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4000         queue_work(local->hw.workqueue, &ifsta->work);
4001         return 0;
4002 }
4003
4004 static char *
4005 ieee80211_sta_scan_result(struct net_device *dev,
4006                           struct ieee80211_sta_bss *bss,
4007                           char *current_ev, char *end_buf)
4008 {
4009         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4010         struct iw_event iwe;
4011
4012         if (time_after(jiffies,
4013                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4014                 return current_ev;
4015
4016         memset(&iwe, 0, sizeof(iwe));
4017         iwe.cmd = SIOCGIWAP;
4018         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4019         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4020         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4021                                           IW_EV_ADDR_LEN);
4022
4023         memset(&iwe, 0, sizeof(iwe));
4024         iwe.cmd = SIOCGIWESSID;
4025         if (bss_mesh_cfg(bss)) {
4026                 iwe.u.data.length = bss_mesh_id_len(bss);
4027                 iwe.u.data.flags = 1;
4028                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4029                                                   bss_mesh_id(bss));
4030         } else {
4031                 iwe.u.data.length = bss->ssid_len;
4032                 iwe.u.data.flags = 1;
4033                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4034                                                   bss->ssid);
4035         }
4036
4037         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4038             || bss_mesh_cfg(bss)) {
4039                 memset(&iwe, 0, sizeof(iwe));
4040                 iwe.cmd = SIOCGIWMODE;
4041                 if (bss_mesh_cfg(bss))
4042                         iwe.u.mode = IW_MODE_MESH;
4043                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4044                         iwe.u.mode = IW_MODE_MASTER;
4045                 else
4046                         iwe.u.mode = IW_MODE_ADHOC;
4047                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4048                                                   IW_EV_UINT_LEN);
4049         }
4050
4051         memset(&iwe, 0, sizeof(iwe));
4052         iwe.cmd = SIOCGIWFREQ;
4053         iwe.u.freq.m = bss->freq;
4054         iwe.u.freq.e = 6;
4055         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4056                                           IW_EV_FREQ_LEN);
4057
4058         memset(&iwe, 0, sizeof(iwe));
4059         iwe.cmd = SIOCGIWFREQ;
4060         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4061         iwe.u.freq.e = 0;
4062         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4063                                           IW_EV_FREQ_LEN);
4064
4065         memset(&iwe, 0, sizeof(iwe));
4066         iwe.cmd = IWEVQUAL;
4067         iwe.u.qual.qual = bss->signal;
4068         iwe.u.qual.level = bss->rssi;
4069         iwe.u.qual.noise = bss->noise;
4070         iwe.u.qual.updated = local->wstats_flags;
4071         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4072                                           IW_EV_QUAL_LEN);
4073
4074         memset(&iwe, 0, sizeof(iwe));
4075         iwe.cmd = SIOCGIWENCODE;
4076         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4077                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4078         else
4079                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4080         iwe.u.data.length = 0;
4081         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4082
4083         if (bss && bss->wpa_ie) {
4084                 memset(&iwe, 0, sizeof(iwe));
4085                 iwe.cmd = IWEVGENIE;
4086                 iwe.u.data.length = bss->wpa_ie_len;
4087                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4088                                                   bss->wpa_ie);
4089         }
4090
4091         if (bss && bss->rsn_ie) {
4092                 memset(&iwe, 0, sizeof(iwe));
4093                 iwe.cmd = IWEVGENIE;
4094                 iwe.u.data.length = bss->rsn_ie_len;
4095                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4096                                                   bss->rsn_ie);
4097         }
4098
4099         if (bss && bss->supp_rates_len > 0) {
4100                 /* display all supported rates in readable format */
4101                 char *p = current_ev + IW_EV_LCP_LEN;
4102                 int i;
4103
4104                 memset(&iwe, 0, sizeof(iwe));
4105                 iwe.cmd = SIOCGIWRATE;
4106                 /* Those two flags are ignored... */
4107                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4108
4109                 for (i = 0; i < bss->supp_rates_len; i++) {
4110                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4111                                                         0x7f) * 500000);
4112                         p = iwe_stream_add_value(current_ev, p,
4113                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4114                 }
4115                 current_ev = p;
4116         }
4117
4118         if (bss) {
4119                 char *buf;
4120                 buf = kmalloc(30, GFP_ATOMIC);
4121                 if (buf) {
4122                         memset(&iwe, 0, sizeof(iwe));
4123                         iwe.cmd = IWEVCUSTOM;
4124                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4125                         iwe.u.data.length = strlen(buf);
4126                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4127                                                           &iwe, buf);
4128                         kfree(buf);
4129                 }
4130         }
4131
4132         if (bss_mesh_cfg(bss)) {
4133                 char *buf;
4134                 u8 *cfg = bss_mesh_cfg(bss);
4135                 buf = kmalloc(50, GFP_ATOMIC);
4136                 if (buf) {
4137                         memset(&iwe, 0, sizeof(iwe));
4138                         iwe.cmd = IWEVCUSTOM;
4139                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4140                         iwe.u.data.length = strlen(buf);
4141                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4142                                                           &iwe, buf);
4143                         sprintf(buf, "Path Selection Protocol ID: "
4144                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4145                                                         cfg[4]);
4146                         iwe.u.data.length = strlen(buf);
4147                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4148                                                           &iwe, buf);
4149                         sprintf(buf, "Path Selection Metric ID: "
4150                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4151                                                         cfg[8]);
4152                         iwe.u.data.length = strlen(buf);
4153                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4154                                                           &iwe, buf);
4155                         sprintf(buf, "Congestion Control Mode ID: "
4156                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4157                                                         cfg[11], cfg[12]);
4158                         iwe.u.data.length = strlen(buf);
4159                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4160                                                           &iwe, buf);
4161                         sprintf(buf, "Channel Precedence: "
4162                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4163                                                         cfg[15], cfg[16]);
4164                         iwe.u.data.length = strlen(buf);
4165                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4166                                                           &iwe, buf);
4167                         kfree(buf);
4168                 }
4169         }
4170
4171         return current_ev;
4172 }
4173
4174
4175 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4176 {
4177         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4178         char *current_ev = buf;
4179         char *end_buf = buf + len;
4180         struct ieee80211_sta_bss *bss;
4181
4182         spin_lock_bh(&local->sta_bss_lock);
4183         list_for_each_entry(bss, &local->sta_bss_list, list) {
4184                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4185                         spin_unlock_bh(&local->sta_bss_lock);
4186                         return -E2BIG;
4187                 }
4188                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4189                                                        end_buf);
4190         }
4191         spin_unlock_bh(&local->sta_bss_lock);
4192         return current_ev - buf;
4193 }
4194
4195
4196 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4197 {
4198         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4199         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4200
4201         kfree(ifsta->extra_ie);
4202         if (len == 0) {
4203                 ifsta->extra_ie = NULL;
4204                 ifsta->extra_ie_len = 0;
4205                 return 0;
4206         }
4207         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4208         if (!ifsta->extra_ie) {
4209                 ifsta->extra_ie_len = 0;
4210                 return -ENOMEM;
4211         }
4212         memcpy(ifsta->extra_ie, ie, len);
4213         ifsta->extra_ie_len = len;
4214         return 0;
4215 }
4216
4217
4218 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4219                                         struct sk_buff *skb, u8 *bssid,
4220                                         u8 *addr)
4221 {
4222         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4223         struct sta_info *sta;
4224         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4225         DECLARE_MAC_BUF(mac);
4226
4227         /* TODO: Could consider removing the least recently used entry and
4228          * allow new one to be added. */
4229         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4230                 if (net_ratelimit()) {
4231                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4232                                "entry %s\n", dev->name, print_mac(mac, addr));
4233                 }
4234                 return NULL;
4235         }
4236
4237         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4238                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4239
4240         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4241         if (!sta)
4242                 return NULL;
4243
4244         sta->flags |= WLAN_STA_AUTHORIZED;
4245
4246         sta->supp_rates[local->hw.conf.channel->band] =
4247                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4248
4249         rate_control_rate_init(sta, local);
4250
4251         if (sta_info_insert(sta))
4252                 return NULL;
4253
4254         return sta;
4255 }
4256
4257
4258 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4259 {
4260         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4261         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4262
4263         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4264                dev->name, reason);
4265
4266         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4267             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4268                 return -EINVAL;
4269
4270         ieee80211_send_deauth(dev, ifsta, reason);
4271         ieee80211_set_disassoc(dev, ifsta, 1);
4272         return 0;
4273 }
4274
4275
4276 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4277 {
4278         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4279         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4280
4281         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4282                dev->name, reason);
4283
4284         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4285                 return -EINVAL;
4286
4287         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4288                 return -1;
4289
4290         ieee80211_send_disassoc(dev, ifsta, reason);
4291         ieee80211_set_disassoc(dev, ifsta, 0);
4292         return 0;
4293 }
4294
4295 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4296                           enum ieee80211_notification_types  notif_type)
4297 {
4298         struct ieee80211_local *local = hw_to_local(hw);
4299         struct ieee80211_sub_if_data *sdata;
4300
4301         switch (notif_type) {
4302         case IEEE80211_NOTIFY_RE_ASSOC:
4303                 rcu_read_lock();
4304                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4305
4306                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4307                                 ieee80211_sta_req_auth(sdata->dev,
4308                                                        &sdata->u.sta);
4309                         }
4310
4311                 }
4312                 rcu_read_unlock();
4313                 break;
4314         }
4315 }
4316 EXPORT_SYMBOL(ieee80211_notify_mac);