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
  91
  92 void ieee802_11_parse_elems(u8 *start, size_t len,
  93                             struct ieee802_11_elems *elems)
  94 {
  95         size_t left = len;
  96         u8 *pos = start;
  97
  98         memset(elems, 0, sizeof(*elems));
  99
 100         while (left >= 2) {
 101                 u8 id, elen;
 102
 103                 id = *pos++;
 104                 elen = *pos++;
 105                 left -= 2;
 106
 107                 if (elen > left)
 108                         return;
 109
 110                 switch (id) {
 111                 case WLAN_EID_SSID:
 112                         elems->ssid = pos;
 113                         elems->ssid_len = elen;
 114                         break;
 115                 case WLAN_EID_SUPP_RATES:
 116                         elems->supp_rates = pos;
 117                         elems->supp_rates_len = elen;
 118                         break;
 119                 case WLAN_EID_FH_PARAMS:
 120                         elems->fh_params = pos;
 121                         elems->fh_params_len = elen;
 122                         break;
 123                 case WLAN_EID_DS_PARAMS:
 124                         elems->ds_params = pos;
 125                         elems->ds_params_len = elen;
 126                         break;
 127                 case WLAN_EID_CF_PARAMS:
 128                         elems->cf_params = pos;
 129                         elems->cf_params_len = elen;
 130                         break;
 131                 case WLAN_EID_TIM:
 132                         elems->tim = pos;
 133                         elems->tim_len = elen;
 134                         break;
 135                 case WLAN_EID_IBSS_PARAMS:
 136                         elems->ibss_params = pos;
 137                         elems->ibss_params_len = elen;
 138                         break;
 139                 case WLAN_EID_CHALLENGE:
 140                         elems->challenge = pos;
 141                         elems->challenge_len = elen;
 142                         break;
 143                 case WLAN_EID_WPA:
 144                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 145                             pos[2] == 0xf2) {
 146                                 /* Microsoft OUI (00:50:F2) */
 147                                 if (pos[3] == 1) {
 148                                         /* OUI Type 1 - WPA IE */
 149                                         elems->wpa = pos;
 150                                         elems->wpa_len = elen;
 151                                 } else if (elen >= 5 && pos[3] == 2) {
 152                                         if (pos[4] == 0) {
 153                                                 elems->wmm_info = pos;
 154                                                 elems->wmm_info_len = elen;
 155                                         } else if (pos[4] == 1) {
 156                                                 elems->wmm_param = pos;
 157                                                 elems->wmm_param_len = elen;
 158                                         }
 159                                 }
 160                         }
 161                         break;
 162                 case WLAN_EID_RSN:
 163                         elems->rsn = pos;
 164                         elems->rsn_len = elen;
 165                         break;
 166                 case WLAN_EID_ERP_INFO:
 167                         elems->erp_info = pos;
 168                         elems->erp_info_len = elen;
 169                         break;
 170                 case WLAN_EID_EXT_SUPP_RATES:
 171                         elems->ext_supp_rates = pos;
 172                         elems->ext_supp_rates_len = elen;
 173                         break;
 174                 case WLAN_EID_HT_CAPABILITY:
 175                         elems->ht_cap_elem = pos;
 176                         elems->ht_cap_elem_len = elen;
 177                         break;
 178                 case WLAN_EID_HT_EXTRA_INFO:
 179                         elems->ht_info_elem = pos;
 180                         elems->ht_info_elem_len = elen;
 181                         break;
 182                 case WLAN_EID_MESH_ID:
 183                         elems->mesh_id = pos;
 184                         elems->mesh_id_len = elen;
 185                         break;
 186                 case WLAN_EID_MESH_CONFIG:
 187                         elems->mesh_config = pos;
 188                         elems->mesh_config_len = elen;
 189                         break;
 190                 case WLAN_EID_PEER_LINK:
 191                         elems->peer_link = pos;
 192                         elems->peer_link_len = elen;
 193                         break;
 194                 case WLAN_EID_PREQ:
 195                         elems->preq = pos;
 196                         elems->preq_len = elen;
 197                         break;
 198                 case WLAN_EID_PREP:
 199                         elems->prep = pos;
 200                         elems->prep_len = elen;
 201                         break;
 202                 case WLAN_EID_PERR:
 203                         elems->perr = pos;
 204                         elems->perr_len = elen;
 205                         break;
 206                 default:
 207                         break;
 208                 }
 209
 210                 left -= elen;
 211                 pos += elen;
 212         }
 213 }
 214
 215
 216 static int ecw2cw(int ecw)
 217 {
 218         return (1 << ecw) - 1;
 219 }
 220
 221
 222 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 223                                          struct ieee80211_sta_bss *bss,
 224                                          int ibss)
 225 {
 226         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 227         struct ieee80211_local *local = sdata->local;
 228         int i, have_higher_than_11mbit = 0;
 229
 230
 231         /* cf. IEEE 802.11 9.2.12 */
 232         for (i = 0; i < bss->supp_rates_len; i++)
 233                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 234                         have_higher_than_11mbit = 1;
 235
 236         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 237             have_higher_than_11mbit)
 238                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 239         else
 240                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 241
 242
 243         if (local->ops->conf_tx) {
 244                 struct ieee80211_tx_queue_params qparam;
 245
 246                 memset(&qparam, 0, sizeof(qparam));
 247
 248                 qparam.aifs = 2;
 249
 250                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 251                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 252                         qparam.cw_min = 31;
 253                 else
 254                         qparam.cw_min = 15;
 255
 256                 qparam.cw_max = 1023;
 257                 qparam.txop = 0;
 258
 259                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
 260                         local->ops->conf_tx(local_to_hw(local),
 261                                            i + IEEE80211_TX_QUEUE_DATA0,
 262                                            &qparam);
 263
 264                 if (ibss) {
 265                         /* IBSS uses different parameters for Beacon sending */
 266                         qparam.cw_min++;
 267                         qparam.cw_min *= 2;
 268                         qparam.cw_min--;
 269                         local->ops->conf_tx(local_to_hw(local),
 270                                            IEEE80211_TX_QUEUE_BEACON, &qparam);
 271                 }
 272         }
 273 }
 274
 275 static void ieee80211_sta_wmm_params(struct net_device *dev,
 276                                      struct ieee80211_if_sta *ifsta,
 277                                      u8 *wmm_param, size_t wmm_param_len)
 278 {
 279         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 280         struct ieee80211_tx_queue_params params;
 281         size_t left;
 282         int count;
 283         u8 *pos;
 284
 285         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 286                 return;
 287         count = wmm_param[6] & 0x0f;
 288         if (count == ifsta->wmm_last_param_set)
 289                 return;
 290         ifsta->wmm_last_param_set = count;
 291
 292         pos = wmm_param + 8;
 293         left = wmm_param_len - 8;
 294
 295         memset(&params, 0, sizeof(params));
 296
 297         if (!local->ops->conf_tx)
 298                 return;
 299
 300         local->wmm_acm = 0;
 301         for (; left >= 4; left -= 4, pos += 4) {
 302                 int aci = (pos[0] >> 5) & 0x03;
 303                 int acm = (pos[0] >> 4) & 0x01;
 304                 int queue;
 305
 306                 switch (aci) {
 307                 case 1:
 308                         queue = IEEE80211_TX_QUEUE_DATA3;
 309                         if (acm) {
 310                                 local->wmm_acm |= BIT(0) | BIT(3);
 311                         }
 312                         break;
 313                 case 2:
 314                         queue = IEEE80211_TX_QUEUE_DATA1;
 315                         if (acm) {
 316                                 local->wmm_acm |= BIT(4) | BIT(5);
 317                         }
 318                         break;
 319                 case 3:
 320                         queue = IEEE80211_TX_QUEUE_DATA0;
 321                         if (acm) {
 322                                 local->wmm_acm |= BIT(6) | BIT(7);
 323                         }
 324                         break;
 325                 case 0:
 326                 default:
 327                         queue = IEEE80211_TX_QUEUE_DATA2;
 328                         if (acm) {
 329                                 local->wmm_acm |= BIT(1) | BIT(2);
 330                         }
 331                         break;
 332                 }
 333
 334                 params.aifs = pos[0] & 0x0f;
 335                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 336                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 337                 params.txop = pos[2] | (pos[3] << 8);
 338 #ifdef CONFIG_MAC80211_DEBUG
 339                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 340                        "cWmin=%d cWmax=%d txop=%d\n",
 341                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 342                        params.cw_max, params.txop);
 343 #endif
 344                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 345                  * AC for now) */
 346                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 347                         printk(KERN_DEBUG "%s: failed to set TX queue "
 348                                "parameters for queue %d\n", dev->name, queue);
 349                 }
 350         }
 351 }
 352
 353 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 354                                            bool use_protection,
 355                                            bool use_short_preamble)
 356 {
 357         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 358         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 359         DECLARE_MAC_BUF(mac);
 360         u32 changed = 0;
 361
 362         if (use_protection != bss_conf->use_cts_prot) {
 363                 if (net_ratelimit()) {
 364                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 365                                "%s)\n",
 366                                sdata->dev->name,
 367                                use_protection ? "enabled" : "disabled",
 368                                print_mac(mac, ifsta->bssid));
 369                 }
 370                 bss_conf->use_cts_prot = use_protection;
 371                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 372         }
 373
 374         if (use_short_preamble != bss_conf->use_short_preamble) {
 375                 if (net_ratelimit()) {
 376                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 377                                " (BSSID=%s)\n",
 378                                sdata->dev->name,
 379                                use_short_preamble ? "short" : "long",
 380                                print_mac(mac, ifsta->bssid));
 381                 }
 382                 bss_conf->use_short_preamble = use_short_preamble;
 383                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 384         }
 385
 386         return changed;
 387 }
 388
 389 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 390                                    u8 erp_value)
 391 {
 392         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 393         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 394
 395         return ieee80211_handle_protect_preamb(sdata,
 396                         use_protection, use_short_preamble);
 397 }
 398
 399 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 400                                            struct ieee80211_sta_bss *bss)
 401 {
 402         u32 changed = 0;
 403
 404         if (bss->has_erp_value)
 405                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 406         else {
 407                 u16 capab = bss->capability;
 408                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 409                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 410         }
 411
 412         return changed;
 413 }
 414
 415 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 416                                    struct ieee80211_ht_info *ht_info)
 417 {
 418
 419         if (ht_info == NULL)
 420                 return -EINVAL;
 421
 422         memset(ht_info, 0, sizeof(*ht_info));
 423
 424         if (ht_cap_ie) {
 425                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 426
 427                 ht_info->ht_supported = 1;
 428                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 429                 ht_info->ampdu_factor =
 430                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 431                 ht_info->ampdu_density =
 432                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 433                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 434         } else
 435                 ht_info->ht_supported = 0;
 436
 437         return 0;
 438 }
 439
 440 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 441                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 442                         struct ieee80211_ht_bss_info *bss_info)
 443 {
 444         if (bss_info == NULL)
 445                 return -EINVAL;
 446
 447         memset(bss_info, 0, sizeof(*bss_info));
 448
 449         if (ht_add_info_ie) {
 450                 u16 op_mode;
 451                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 452
 453                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 454                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 455                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 456         }
 457
 458         return 0;
 459 }
 460
 461 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 462                                          struct ieee80211_if_sta *ifsta)
 463 {
 464         char *buf;
 465         size_t len;
 466         int i;
 467         union iwreq_data wrqu;
 468
 469         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 470                 return;
 471
 472         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 473                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 474         if (!buf)
 475                 return;
 476
 477         len = sprintf(buf, "ASSOCINFO(");
 478         if (ifsta->assocreq_ies) {
 479                 len += sprintf(buf + len, "ReqIEs=");
 480                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 481                         len += sprintf(buf + len, "%02x",
 482                                        ifsta->assocreq_ies[i]);
 483                 }
 484         }
 485         if (ifsta->assocresp_ies) {
 486                 if (ifsta->assocreq_ies)
 487                         len += sprintf(buf + len, " ");
 488                 len += sprintf(buf + len, "RespIEs=");
 489                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 490                         len += sprintf(buf + len, "%02x",
 491                                        ifsta->assocresp_ies[i]);
 492                 }
 493         }
 494         len += sprintf(buf + len, ")");
 495
 496         if (len > IW_CUSTOM_MAX) {
 497                 len = sprintf(buf, "ASSOCRESPIE=");
 498                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 499                         len += sprintf(buf + len, "%02x",
 500                                        ifsta->assocresp_ies[i]);
 501                 }
 502         }
 503
 504         memset(&wrqu, 0, sizeof(wrqu));
 505         wrqu.data.length = len;
 506         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 507
 508         kfree(buf);
 509 }
 510
 511
 512 static void ieee80211_set_associated(struct net_device *dev,
 513                                      struct ieee80211_if_sta *ifsta,
 514                                      bool assoc)
 515 {
 516         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 517         struct ieee80211_local *local = sdata->local;
 518         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 519         union iwreq_data wrqu;
 520         u32 changed = BSS_CHANGED_ASSOC;
 521
 522         if (assoc) {
 523                 struct ieee80211_sta_bss *bss;
 524
 525                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 526
 527                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 528                         return;
 529
 530                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 531                                            conf->channel->center_freq,
 532                                            ifsta->ssid, ifsta->ssid_len);
 533                 if (bss) {
 534                         /* set timing information */
 535                         sdata->bss_conf.beacon_int = bss->beacon_int;
 536                         sdata->bss_conf.timestamp = bss->timestamp;
 537
 538                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 539
 540                         ieee80211_rx_bss_put(dev, bss);
 541                 }
 542
 543                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 544                         changed |= BSS_CHANGED_HT;
 545                         sdata->bss_conf.assoc_ht = 1;
 546                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 547                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 548                 }
 549
 550                 netif_carrier_on(dev);
 551                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 552                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 553                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 554                 ieee80211_sta_send_associnfo(dev, ifsta);
 555         } else {
 556                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 557                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 558                 netif_carrier_off(dev);
 559                 ieee80211_reset_erp_info(dev);
 560
 561                 sdata->bss_conf.assoc_ht = 0;
 562                 sdata->bss_conf.ht_conf = NULL;
 563                 sdata->bss_conf.ht_bss_conf = NULL;
 564
 565                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 566         }
 567         ifsta->last_probe = jiffies;
 568         ieee80211_led_assoc(local, assoc);
 569
 570         sdata->bss_conf.assoc = assoc;
 571         ieee80211_bss_info_change_notify(sdata, changed);
 572         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 573         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 574 }
 575
 576 static void ieee80211_set_disassoc(struct net_device *dev,
 577                                    struct ieee80211_if_sta *ifsta, int deauth)
 578 {
 579         if (deauth)
 580                 ifsta->auth_tries = 0;
 581         ifsta->assoc_tries = 0;
 582         ieee80211_set_associated(dev, ifsta, 0);
 583 }
 584
 585 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 586                       int encrypt)
 587 {
 588         struct ieee80211_sub_if_data *sdata;
 589         struct ieee80211_tx_packet_data *pkt_data;
 590
 591         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 592         skb->dev = sdata->local->mdev;
 593         skb_set_mac_header(skb, 0);
 594         skb_set_network_header(skb, 0);
 595         skb_set_transport_header(skb, 0);
 596
 597         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 598         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 599         pkt_data->ifindex = sdata->dev->ifindex;
 600         if (!encrypt)
 601                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 602
 603         dev_queue_xmit(skb);
 604 }
 605
 606
 607 static void ieee80211_send_auth(struct net_device *dev,
 608                                 struct ieee80211_if_sta *ifsta,
 609                                 int transaction, u8 *extra, size_t extra_len,
 610                                 int encrypt)
 611 {
 612         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 613         struct sk_buff *skb;
 614         struct ieee80211_mgmt *mgmt;
 615
 616         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 617                             sizeof(*mgmt) + 6 + extra_len);
 618         if (!skb) {
 619                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 620                        "frame\n", dev->name);
 621                 return;
 622         }
 623         skb_reserve(skb, local->hw.extra_tx_headroom);
 624
 625         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 626         memset(mgmt, 0, 24 + 6);
 627         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 628                                            IEEE80211_STYPE_AUTH);
 629         if (encrypt)
 630                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 631         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 632         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 633         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 634         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 635         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 636         ifsta->auth_transaction = transaction + 1;
 637         mgmt->u.auth.status_code = cpu_to_le16(0);
 638         if (extra)
 639                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 640
 641         ieee80211_sta_tx(dev, skb, encrypt);
 642 }
 643
 644
 645 static void ieee80211_authenticate(struct net_device *dev,
 646                                    struct ieee80211_if_sta *ifsta)
 647 {
 648         DECLARE_MAC_BUF(mac);
 649
 650         ifsta->auth_tries++;
 651         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 652                 printk(KERN_DEBUG "%s: authentication with AP %s"
 653                        " timed out\n",
 654                        dev->name, print_mac(mac, ifsta->bssid));
 655                 ifsta->state = IEEE80211_DISABLED;
 656                 return;
 657         }
 658
 659         ifsta->state = IEEE80211_AUTHENTICATE;
 660         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 661                dev->name, print_mac(mac, ifsta->bssid));
 662
 663         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 664
 665         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 666 }
 667
 668
 669 static void ieee80211_send_assoc(struct net_device *dev,
 670                                  struct ieee80211_if_sta *ifsta)
 671 {
 672         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 673         struct sk_buff *skb;
 674         struct ieee80211_mgmt *mgmt;
 675         u8 *pos, *ies;
 676         int i, len;
 677         u16 capab;
 678         struct ieee80211_sta_bss *bss;
 679         int wmm = 0;
 680         struct ieee80211_supported_band *sband;
 681
 682         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 683                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 684                             ifsta->ssid_len);
 685         if (!skb) {
 686                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 687                        "frame\n", dev->name);
 688                 return;
 689         }
 690         skb_reserve(skb, local->hw.extra_tx_headroom);
 691
 692         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 693
 694         capab = ifsta->capab;
 695
 696         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 697                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 698                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 699                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 700                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 701         }
 702
 703         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 704                                    local->hw.conf.channel->center_freq,
 705                                    ifsta->ssid, ifsta->ssid_len);
 706         if (bss) {
 707                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 708                         capab |= WLAN_CAPABILITY_PRIVACY;
 709                 if (bss->wmm_ie) {
 710                         wmm = 1;
 711                 }
 712                 ieee80211_rx_bss_put(dev, bss);
 713         }
 714
 715         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 716         memset(mgmt, 0, 24);
 717         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 718         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 719         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 720
 721         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 722                 skb_put(skb, 10);
 723                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 724                                                    IEEE80211_STYPE_REASSOC_REQ);
 725                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 726                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 727                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 728                        ETH_ALEN);
 729         } else {
 730                 skb_put(skb, 4);
 731                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 732                                                    IEEE80211_STYPE_ASSOC_REQ);
 733                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 734                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 735         }
 736
 737         /* SSID */
 738         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 739         *pos++ = WLAN_EID_SSID;
 740         *pos++ = ifsta->ssid_len;
 741         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 742
 743         len = sband->n_bitrates;
 744         if (len > 8)
 745                 len = 8;
 746         pos = skb_put(skb, len + 2);
 747         *pos++ = WLAN_EID_SUPP_RATES;
 748         *pos++ = len;
 749         for (i = 0; i < len; i++) {
 750                 int rate = sband->bitrates[i].bitrate;
 751                 *pos++ = (u8) (rate / 5);
 752         }
 753
 754         if (sband->n_bitrates > len) {
 755                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 756                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 757                 *pos++ = sband->n_bitrates - len;
 758                 for (i = len; i < sband->n_bitrates; i++) {
 759                         int rate = sband->bitrates[i].bitrate;
 760                         *pos++ = (u8) (rate / 5);
 761                 }
 762         }
 763
 764         if (ifsta->extra_ie) {
 765                 pos = skb_put(skb, ifsta->extra_ie_len);
 766                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 767         }
 768
 769         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 770                 pos = skb_put(skb, 9);
 771                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 772                 *pos++ = 7; /* len */
 773                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 774                 *pos++ = 0x50;
 775                 *pos++ = 0xf2;
 776                 *pos++ = 2; /* WME */
 777                 *pos++ = 0; /* WME info */
 778                 *pos++ = 1; /* WME ver */
 779                 *pos++ = 0;
 780         }
 781         /* wmm support is a must to HT */
 782         if (wmm && sband->ht_info.ht_supported) {
 783                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 784                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 785                 *pos++ = WLAN_EID_HT_CAPABILITY;
 786                 *pos++ = sizeof(struct ieee80211_ht_cap);
 787                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 788                 memcpy(pos, &tmp, sizeof(u16));
 789                 pos += sizeof(u16);
 790                 /* TODO: needs a define here for << 2 */
 791                 *pos++ = sband->ht_info.ampdu_factor |
 792                          (sband->ht_info.ampdu_density << 2);
 793                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 794         }
 795
 796         kfree(ifsta->assocreq_ies);
 797         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 798         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 799         if (ifsta->assocreq_ies)
 800                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 801
 802         ieee80211_sta_tx(dev, skb, 0);
 803 }
 804
 805
 806 static void ieee80211_send_deauth(struct net_device *dev,
 807                                   struct ieee80211_if_sta *ifsta, u16 reason)
 808 {
 809         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 810         struct sk_buff *skb;
 811         struct ieee80211_mgmt *mgmt;
 812
 813         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 814         if (!skb) {
 815                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 816                        "frame\n", dev->name);
 817                 return;
 818         }
 819         skb_reserve(skb, local->hw.extra_tx_headroom);
 820
 821         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 822         memset(mgmt, 0, 24);
 823         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 824         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 825         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 826         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 827                                            IEEE80211_STYPE_DEAUTH);
 828         skb_put(skb, 2);
 829         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 830
 831         ieee80211_sta_tx(dev, skb, 0);
 832 }
 833
 834
 835 static void ieee80211_send_disassoc(struct net_device *dev,
 836                                     struct ieee80211_if_sta *ifsta, u16 reason)
 837 {
 838         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 839         struct sk_buff *skb;
 840         struct ieee80211_mgmt *mgmt;
 841
 842         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 843         if (!skb) {
 844                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 845                        "frame\n", dev->name);
 846                 return;
 847         }
 848         skb_reserve(skb, local->hw.extra_tx_headroom);
 849
 850         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 851         memset(mgmt, 0, 24);
 852         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 853         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 854         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 855         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 856                                            IEEE80211_STYPE_DISASSOC);
 857         skb_put(skb, 2);
 858         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 859
 860         ieee80211_sta_tx(dev, skb, 0);
 861 }
 862
 863
 864 static int ieee80211_privacy_mismatch(struct net_device *dev,
 865                                       struct ieee80211_if_sta *ifsta)
 866 {
 867         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 868         struct ieee80211_sta_bss *bss;
 869         int bss_privacy;
 870         int wep_privacy;
 871         int privacy_invoked;
 872
 873         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 874                 return 0;
 875
 876         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 877                                    local->hw.conf.channel->center_freq,
 878                                    ifsta->ssid, ifsta->ssid_len);
 879         if (!bss)
 880                 return 0;
 881
 882         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 883         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 884         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 885
 886         ieee80211_rx_bss_put(dev, bss);
 887
 888         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 889                 return 0;
 890
 891         return 1;
 892 }
 893
 894
 895 static void ieee80211_associate(struct net_device *dev,
 896                                 struct ieee80211_if_sta *ifsta)
 897 {
 898         DECLARE_MAC_BUF(mac);
 899
 900         ifsta->assoc_tries++;
 901         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 902                 printk(KERN_DEBUG "%s: association with AP %s"
 903                        " timed out\n",
 904                        dev->name, print_mac(mac, ifsta->bssid));
 905                 ifsta->state = IEEE80211_DISABLED;
 906                 return;
 907         }
 908
 909         ifsta->state = IEEE80211_ASSOCIATE;
 910         printk(KERN_DEBUG "%s: associate with AP %s\n",
 911                dev->name, print_mac(mac, ifsta->bssid));
 912         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 913                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 914                        "mixed-cell disabled - abort association\n", dev->name);
 915                 ifsta->state = IEEE80211_DISABLED;
 916                 return;
 917         }
 918
 919         ieee80211_send_assoc(dev, ifsta);
 920
 921         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 922 }
 923
 924
 925 static void ieee80211_associated(struct net_device *dev,
 926                                  struct ieee80211_if_sta *ifsta)
 927 {
 928         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 929         struct sta_info *sta;
 930         int disassoc;
 931         DECLARE_MAC_BUF(mac);
 932
 933         /* TODO: start monitoring current AP signal quality and number of
 934          * missed beacons. Scan other channels every now and then and search
 935          * for better APs. */
 936         /* TODO: remove expired BSSes */
 937
 938         ifsta->state = IEEE80211_ASSOCIATED;
 939
 940         rcu_read_lock();
 941
 942         sta = sta_info_get(local, ifsta->bssid);
 943         if (!sta) {
 944                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 945                        dev->name, print_mac(mac, ifsta->bssid));
 946                 disassoc = 1;
 947         } else {
 948                 disassoc = 0;
 949                 if (time_after(jiffies,
 950                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 951                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 952                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 953                                        "current AP %s - assume out of "
 954                                        "range\n",
 955                                        dev->name, print_mac(mac, ifsta->bssid));
 956                                 disassoc = 1;
 957                                 sta_info_unlink(&sta);
 958                         } else
 959                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 960                                                          local->scan_ssid,
 961                                                          local->scan_ssid_len);
 962                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 963                 } else {
 964                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 965                         if (time_after(jiffies, ifsta->last_probe +
 966                                        IEEE80211_PROBE_INTERVAL)) {
 967                                 ifsta->last_probe = jiffies;
 968                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 969                                                          ifsta->ssid,
 970                                                          ifsta->ssid_len);
 971                         }
 972                 }
 973         }
 974
 975         rcu_read_unlock();
 976
 977         if (disassoc && sta)
 978                 sta_info_destroy(sta);
 979
 980         if (disassoc) {
 981                 ifsta->state = IEEE80211_DISABLED;
 982                 ieee80211_set_associated(dev, ifsta, 0);
 983         } else {
 984                 mod_timer(&ifsta->timer, jiffies +
 985                                       IEEE80211_MONITORING_INTERVAL);
 986         }
 987 }
 988
 989
 990 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 991                                      u8 *ssid, size_t ssid_len)
 992 {
 993         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 994         struct ieee80211_supported_band *sband;
 995         struct sk_buff *skb;
 996         struct ieee80211_mgmt *mgmt;
 997         u8 *pos, *supp_rates, *esupp_rates = NULL;
 998         int i;
 999
1000         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1001         if (!skb) {
1002                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1003                        "request\n", dev->name);
1004                 return;
1005         }
1006         skb_reserve(skb, local->hw.extra_tx_headroom);
1007
1008         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1009         memset(mgmt, 0, 24);
1010         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1011                                            IEEE80211_STYPE_PROBE_REQ);
1012         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1013         if (dst) {
1014                 memcpy(mgmt->da, dst, ETH_ALEN);
1015                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1016         } else {
1017                 memset(mgmt->da, 0xff, ETH_ALEN);
1018                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1019         }
1020         pos = skb_put(skb, 2 + ssid_len);
1021         *pos++ = WLAN_EID_SSID;
1022         *pos++ = ssid_len;
1023         memcpy(pos, ssid, ssid_len);
1024
1025         supp_rates = skb_put(skb, 2);
1026         supp_rates[0] = WLAN_EID_SUPP_RATES;
1027         supp_rates[1] = 0;
1028         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1029
1030         for (i = 0; i < sband->n_bitrates; i++) {
1031                 struct ieee80211_rate *rate = &sband->bitrates[i];
1032                 if (esupp_rates) {
1033                         pos = skb_put(skb, 1);
1034                         esupp_rates[1]++;
1035                 } else if (supp_rates[1] == 8) {
1036                         esupp_rates = skb_put(skb, 3);
1037                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1038                         esupp_rates[1] = 1;
1039                         pos = &esupp_rates[2];
1040                 } else {
1041                         pos = skb_put(skb, 1);
1042                         supp_rates[1]++;
1043                 }
1044                 *pos = rate->bitrate / 5;
1045         }
1046
1047         ieee80211_sta_tx(dev, skb, 0);
1048 }
1049
1050
1051 static int ieee80211_sta_wep_configured(struct net_device *dev)
1052 {
1053         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1054         if (!sdata || !sdata->default_key ||
1055             sdata->default_key->conf.alg != ALG_WEP)
1056                 return 0;
1057         return 1;
1058 }
1059
1060
1061 static void ieee80211_auth_completed(struct net_device *dev,
1062                                      struct ieee80211_if_sta *ifsta)
1063 {
1064         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1065         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1066         ieee80211_associate(dev, ifsta);
1067 }
1068
1069
1070 static void ieee80211_auth_challenge(struct net_device *dev,
1071                                      struct ieee80211_if_sta *ifsta,
1072                                      struct ieee80211_mgmt *mgmt,
1073                                      size_t len)
1074 {
1075         u8 *pos;
1076         struct ieee802_11_elems elems;
1077
1078         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1079         pos = mgmt->u.auth.variable;
1080         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1081         if (!elems.challenge) {
1082                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1083                        "frame\n", dev->name);
1084                 return;
1085         }
1086         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1087                             elems.challenge_len + 2, 1);
1088 }
1089
1090 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1091                                         u8 dialog_token, u16 status, u16 policy,
1092                                         u16 buf_size, u16 timeout)
1093 {
1094         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1095         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1096         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1097         struct sk_buff *skb;
1098         struct ieee80211_mgmt *mgmt;
1099         u16 capab;
1100
1101         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1102                                         sizeof(mgmt->u.action.u.addba_resp));
1103         if (!skb) {
1104                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1105                        "for addba resp frame\n", dev->name);
1106                 return;
1107         }
1108
1109         skb_reserve(skb, local->hw.extra_tx_headroom);
1110         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1111         memset(mgmt, 0, 24);
1112         memcpy(mgmt->da, da, ETH_ALEN);
1113         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1114         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1115                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1116         else
1117                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1118         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1119                                            IEEE80211_STYPE_ACTION);
1120
1121         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1122         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1123         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1124         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1125
1126         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1127         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1128         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1129
1130         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1131         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1132         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1133
1134         ieee80211_sta_tx(dev, skb, 0);
1135
1136         return;
1137 }
1138
1139 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1140                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1141                                 u16 agg_size, u16 timeout)
1142 {
1143         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1144         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1145         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1146         struct sk_buff *skb;
1147         struct ieee80211_mgmt *mgmt;
1148         u16 capab;
1149
1150         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1151                                 sizeof(mgmt->u.action.u.addba_req));
1152
1153
1154         if (!skb) {
1155                 printk(KERN_ERR "%s: failed to allocate buffer "
1156                                 "for addba request frame\n", dev->name);
1157                 return;
1158         }
1159         skb_reserve(skb, local->hw.extra_tx_headroom);
1160         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1161         memset(mgmt, 0, 24);
1162         memcpy(mgmt->da, da, ETH_ALEN);
1163         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1164         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1165                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1166         else
1167                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1168
1169         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1170                                         IEEE80211_STYPE_ACTION);
1171
1172         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1173
1174         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1175         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1176
1177         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1178         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1179         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1180         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1181
1182         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1183
1184         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1185         mgmt->u.action.u.addba_req.start_seq_num =
1186                                         cpu_to_le16(start_seq_num << 4);
1187
1188         ieee80211_sta_tx(dev, skb, 0);
1189 }
1190
1191 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1192                                                 struct ieee80211_mgmt *mgmt,
1193                                                 size_t len)
1194 {
1195         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1196         struct ieee80211_hw *hw = &local->hw;
1197         struct ieee80211_conf *conf = &hw->conf;
1198         struct sta_info *sta;
1199         struct tid_ampdu_rx *tid_agg_rx;
1200         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1201         u8 dialog_token;
1202         int ret = -EOPNOTSUPP;
1203         DECLARE_MAC_BUF(mac);
1204
1205         rcu_read_lock();
1206
1207         sta = sta_info_get(local, mgmt->sa);
1208         if (!sta) {
1209                 rcu_read_unlock();
1210                 return;
1211         }
1212
1213         /* extract session parameters from addba request frame */
1214         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1215         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1216         start_seq_num =
1217                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1218
1219         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1220         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1221         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1222         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1223
1224         status = WLAN_STATUS_REQUEST_DECLINED;
1225
1226         /* sanity check for incoming parameters:
1227          * check if configuration can support the BA policy
1228          * and if buffer size does not exceeds max value */
1229         if (((ba_policy != 1)
1230                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1231                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1232                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1233 #ifdef CONFIG_MAC80211_HT_DEBUG
1234                 if (net_ratelimit())
1235                         printk(KERN_DEBUG "AddBA Req with bad params from "
1236                                 "%s on tid %u. policy %d, buffer size %d\n",
1237                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1238                                 buf_size);
1239 #endif /* CONFIG_MAC80211_HT_DEBUG */
1240                 goto end_no_lock;
1241         }
1242         /* determine default buffer size */
1243         if (buf_size == 0) {
1244                 struct ieee80211_supported_band *sband;
1245
1246                 sband = local->hw.wiphy->bands[conf->channel->band];
1247                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1248                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1249         }
1250
1251
1252         /* examine state machine */
1253         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1254
1255         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1256 #ifdef CONFIG_MAC80211_HT_DEBUG
1257                 if (net_ratelimit())
1258                         printk(KERN_DEBUG "unexpected AddBA Req from "
1259                                 "%s on tid %u\n",
1260                                 print_mac(mac, mgmt->sa), tid);
1261 #endif /* CONFIG_MAC80211_HT_DEBUG */
1262                 goto end;
1263         }
1264
1265         /* prepare A-MPDU MLME for Rx aggregation */
1266         sta->ampdu_mlme.tid_rx[tid] =
1267                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1268         if (!sta->ampdu_mlme.tid_rx[tid]) {
1269                 if (net_ratelimit())
1270                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1271                                         tid);
1272                 goto end;
1273         }
1274         /* rx timer */
1275         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1276                                 sta_rx_agg_session_timer_expired;
1277         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1278                                 (unsigned long)&sta->timer_to_tid[tid];
1279         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1280
1281         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1282
1283         /* prepare reordering buffer */
1284         tid_agg_rx->reorder_buf =
1285                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1286         if (!tid_agg_rx->reorder_buf) {
1287                 if (net_ratelimit())
1288                         printk(KERN_ERR "can not allocate reordering buffer "
1289                                "to tid %d\n", tid);
1290                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1291                 goto end;
1292         }
1293         memset(tid_agg_rx->reorder_buf, 0,
1294                 buf_size * sizeof(struct sk_buf *));
1295
1296         if (local->ops->ampdu_action)
1297                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1298                                                sta->addr, tid, &start_seq_num);
1299 #ifdef CONFIG_MAC80211_HT_DEBUG
1300         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1301 #endif /* CONFIG_MAC80211_HT_DEBUG */
1302
1303         if (ret) {
1304                 kfree(tid_agg_rx->reorder_buf);
1305                 kfree(tid_agg_rx);
1306                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1307                 goto end;
1308         }
1309
1310         /* change state and send addba resp */
1311         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1312         tid_agg_rx->dialog_token = dialog_token;
1313         tid_agg_rx->ssn = start_seq_num;
1314         tid_agg_rx->head_seq_num = start_seq_num;
1315         tid_agg_rx->buf_size = buf_size;
1316         tid_agg_rx->timeout = timeout;
1317         tid_agg_rx->stored_mpdu_num = 0;
1318         status = WLAN_STATUS_SUCCESS;
1319 end:
1320         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1321
1322 end_no_lock:
1323         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1324                                   dialog_token, status, 1, buf_size, timeout);
1325         rcu_read_unlock();
1326 }
1327
1328 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1329                                              struct ieee80211_mgmt *mgmt,
1330                                              size_t len)
1331 {
1332         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1333         struct ieee80211_hw *hw = &local->hw;
1334         struct sta_info *sta;
1335         u16 capab;
1336         u16 tid;
1337         u8 *state;
1338
1339         rcu_read_lock();
1340
1341         sta = sta_info_get(local, mgmt->sa);
1342         if (!sta) {
1343                 rcu_read_unlock();
1344                 return;
1345         }
1346
1347         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1348         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1349
1350         state = &sta->ampdu_mlme.tid_state_tx[tid];
1351
1352         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1353
1354         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1355                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1356                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1357                         "%d\n", *state);
1358                 goto addba_resp_exit;
1359         }
1360
1361         if (mgmt->u.action.u.addba_resp.dialog_token !=
1362                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1363                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1364 #ifdef CONFIG_MAC80211_HT_DEBUG
1365                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1366 #endif /* CONFIG_MAC80211_HT_DEBUG */
1367                 goto addba_resp_exit;
1368         }
1369
1370         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1371 #ifdef CONFIG_MAC80211_HT_DEBUG
1372         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1373 #endif /* CONFIG_MAC80211_HT_DEBUG */
1374         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1375                         == WLAN_STATUS_SUCCESS) {
1376                 if (*state & HT_ADDBA_RECEIVED_MSK)
1377                         printk(KERN_DEBUG "double addBA response\n");
1378
1379                 *state |= HT_ADDBA_RECEIVED_MSK;
1380                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1381
1382                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1383                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1384                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1385                 }
1386
1387                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1388                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1389         } else {
1390                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1391
1392                 sta->ampdu_mlme.addba_req_num[tid]++;
1393                 /* this will allow the state check in stop_BA_session */
1394                 *state = HT_AGG_STATE_OPERATIONAL;
1395                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1396                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1397                                              WLAN_BACK_INITIATOR);
1398         }
1399
1400 addba_resp_exit:
1401         rcu_read_unlock();
1402 }
1403
1404 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1405                           u16 initiator, u16 reason_code)
1406 {
1407         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1408         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1409         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1410         struct sk_buff *skb;
1411         struct ieee80211_mgmt *mgmt;
1412         u16 params;
1413
1414         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1415                                         sizeof(mgmt->u.action.u.delba));
1416
1417         if (!skb) {
1418                 printk(KERN_ERR "%s: failed to allocate buffer "
1419                                         "for delba frame\n", dev->name);
1420                 return;
1421         }
1422
1423         skb_reserve(skb, local->hw.extra_tx_headroom);
1424         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1425         memset(mgmt, 0, 24);
1426         memcpy(mgmt->da, da, ETH_ALEN);
1427         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1428         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1429                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1430         else
1431                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1432         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1433                                         IEEE80211_STYPE_ACTION);
1434
1435         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1436
1437         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1438         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1439         params = (u16)(initiator << 11);        /* bit 11 initiator */
1440         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1441
1442         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1443         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1444
1445         ieee80211_sta_tx(dev, skb, 0);
1446 }
1447
1448 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1449                                         u16 initiator, u16 reason)
1450 {
1451         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1452         struct ieee80211_hw *hw = &local->hw;
1453         struct sta_info *sta;
1454         int ret, i;
1455         DECLARE_MAC_BUF(mac);
1456
1457         rcu_read_lock();
1458
1459         sta = sta_info_get(local, ra);
1460         if (!sta) {
1461                 rcu_read_unlock();
1462                 return;
1463         }
1464
1465         /* check if TID is in operational state */
1466         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1467         if (sta->ampdu_mlme.tid_state_rx[tid]
1468                                 != HT_AGG_STATE_OPERATIONAL) {
1469                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1470                 rcu_read_unlock();
1471                 return;
1472         }
1473         sta->ampdu_mlme.tid_state_rx[tid] =
1474                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1475                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1476         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1477
1478         /* stop HW Rx aggregation. ampdu_action existence
1479          * already verified in session init so we add the BUG_ON */
1480         BUG_ON(!local->ops->ampdu_action);
1481
1482 #ifdef CONFIG_MAC80211_HT_DEBUG
1483         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1484                                 print_mac(mac, ra), tid);
1485 #endif /* CONFIG_MAC80211_HT_DEBUG */
1486
1487         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1488                                         ra, tid, NULL);
1489         if (ret)
1490                 printk(KERN_DEBUG "HW problem - can not stop rx "
1491                                 "aggergation for tid %d\n", tid);
1492
1493         /* shutdown timer has not expired */
1494         if (initiator != WLAN_BACK_TIMER)
1495                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1496
1497         /* check if this is a self generated aggregation halt */
1498         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1499                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1500
1501         /* free the reordering buffer */
1502         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1503                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1504                         /* release the reordered frames */
1505                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1506                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1507                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1508                 }
1509         }
1510         /* free resources */
1511         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1512         kfree(sta->ampdu_mlme.tid_rx[tid]);
1513         sta->ampdu_mlme.tid_rx[tid] = NULL;
1514         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1515
1516         rcu_read_unlock();
1517 }
1518
1519
1520 static void ieee80211_sta_process_delba(struct net_device *dev,
1521                         struct ieee80211_mgmt *mgmt, size_t len)
1522 {
1523         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1524         struct sta_info *sta;
1525         u16 tid, params;
1526         u16 initiator;
1527         DECLARE_MAC_BUF(mac);
1528
1529         rcu_read_lock();
1530
1531         sta = sta_info_get(local, mgmt->sa);
1532         if (!sta) {
1533                 rcu_read_unlock();
1534                 return;
1535         }
1536
1537         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1538         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1539         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1540
1541 #ifdef CONFIG_MAC80211_HT_DEBUG
1542         if (net_ratelimit())
1543                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1544                         print_mac(mac, mgmt->sa),
1545                         initiator ? "initiator" : "recipient", tid,
1546                         mgmt->u.action.u.delba.reason_code);
1547 #endif /* CONFIG_MAC80211_HT_DEBUG */
1548
1549         if (initiator == WLAN_BACK_INITIATOR)
1550                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1551                                                  WLAN_BACK_INITIATOR, 0);
1552         else { /* WLAN_BACK_RECIPIENT */
1553                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1554                 sta->ampdu_mlme.tid_state_tx[tid] =
1555                                 HT_AGG_STATE_OPERATIONAL;
1556                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1557                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1558                                              WLAN_BACK_RECIPIENT);
1559         }
1560         rcu_read_unlock();
1561 }
1562
1563 /*
1564  * After sending add Block Ack request we activated a timer until
1565  * add Block Ack response will arrive from the recipient.
1566  * If this timer expires sta_addba_resp_timer_expired will be executed.
1567  */
1568 void sta_addba_resp_timer_expired(unsigned long data)
1569 {
1570         /* not an elegant detour, but there is no choice as the timer passes
1571          * only one argument, and both sta_info and TID are needed, so init
1572          * flow in sta_info_create gives the TID as data, while the timer_to_id
1573          * array gives the sta through container_of */
1574         u16 tid = *(int *)data;
1575         struct sta_info *temp_sta = container_of((void *)data,
1576                 struct sta_info, timer_to_tid[tid]);
1577
1578         struct ieee80211_local *local = temp_sta->local;
1579         struct ieee80211_hw *hw = &local->hw;
1580         struct sta_info *sta;
1581         u8 *state;
1582
1583         rcu_read_lock();
1584
1585         sta = sta_info_get(local, temp_sta->addr);
1586         if (!sta) {
1587                 rcu_read_unlock();
1588                 return;
1589         }
1590
1591         state = &sta->ampdu_mlme.tid_state_tx[tid];
1592         /* check if the TID waits for addBA response */
1593         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1594         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1595                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1596                 *state = HT_AGG_STATE_IDLE;
1597                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1598                                 "expecting addBA response there", tid);
1599                 goto timer_expired_exit;
1600         }
1601
1602         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1603
1604         /* go through the state check in stop_BA_session */
1605         *state = HT_AGG_STATE_OPERATIONAL;
1606         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1607         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1608                                      WLAN_BACK_INITIATOR);
1609
1610 timer_expired_exit:
1611         rcu_read_unlock();
1612 }
1613
1614 /*
1615  * After accepting the AddBA Request we activated a timer,
1616  * resetting it after each frame that arrives from the originator.
1617  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1618  */
1619 void sta_rx_agg_session_timer_expired(unsigned long data)
1620 {
1621         /* not an elegant detour, but there is no choice as the timer passes
1622          * only one argument, and verious sta_info are needed here, so init
1623          * flow in sta_info_create gives the TID as data, while the timer_to_id
1624          * array gives the sta through container_of */
1625         u8 *ptid = (u8 *)data;
1626         u8 *timer_to_id = ptid - *ptid;
1627         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1628                                          timer_to_tid[0]);
1629
1630         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1631         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1632                                          (u16)*ptid, WLAN_BACK_TIMER,
1633                                          WLAN_REASON_QSTA_TIMEOUT);
1634 }
1635
1636 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1637 {
1638         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1639         int i;
1640
1641         for (i = 0; i <  STA_TID_NUM; i++) {
1642                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1643                                              WLAN_BACK_INITIATOR);
1644                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1645                                                  WLAN_BACK_RECIPIENT,
1646                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1647         }
1648 }
1649
1650 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1651                                    struct ieee80211_if_sta *ifsta,
1652                                    struct ieee80211_mgmt *mgmt,
1653                                    size_t len)
1654 {
1655         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1656         u16 auth_alg, auth_transaction, status_code;
1657         DECLARE_MAC_BUF(mac);
1658
1659         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1660             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1661                 printk(KERN_DEBUG "%s: authentication frame received from "
1662                        "%s, but not in authenticate state - ignored\n",
1663                        dev->name, print_mac(mac, mgmt->sa));
1664                 return;
1665         }
1666
1667         if (len < 24 + 6) {
1668                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1669                        "received from %s - ignored\n",
1670                        dev->name, len, print_mac(mac, mgmt->sa));
1671                 return;
1672         }
1673
1674         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1675             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1676                 printk(KERN_DEBUG "%s: authentication frame received from "
1677                        "unknown AP (SA=%s BSSID=%s) - "
1678                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1679                        print_mac(mac, mgmt->bssid));
1680                 return;
1681         }
1682
1683         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1684             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1685                 printk(KERN_DEBUG "%s: authentication frame received from "
1686                        "unknown BSSID (SA=%s BSSID=%s) - "
1687                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1688                        print_mac(mac, mgmt->bssid));
1689                 return;
1690         }
1691
1692         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1693         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1694         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1695
1696         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1697                "transaction=%d status=%d)\n",
1698                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1699                auth_transaction, status_code);
1700
1701         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1702                 /* IEEE 802.11 standard does not require authentication in IBSS
1703                  * networks and most implementations do not seem to use it.
1704                  * However, try to reply to authentication attempts if someone
1705                  * has actually implemented this.
1706                  * TODO: Could implement shared key authentication. */
1707                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1708                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1709                                "frame (alg=%d transaction=%d)\n",
1710                                dev->name, auth_alg, auth_transaction);
1711                         return;
1712                 }
1713                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1714         }
1715
1716         if (auth_alg != ifsta->auth_alg ||
1717             auth_transaction != ifsta->auth_transaction) {
1718                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1719                        "(alg=%d transaction=%d)\n",
1720                        dev->name, auth_alg, auth_transaction);
1721                 return;
1722         }
1723
1724         if (status_code != WLAN_STATUS_SUCCESS) {
1725                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1726                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1727                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1728                         u8 algs[3];
1729                         const int num_algs = ARRAY_SIZE(algs);
1730                         int i, pos;
1731                         algs[0] = algs[1] = algs[2] = 0xff;
1732                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1733                                 algs[0] = WLAN_AUTH_OPEN;
1734                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1735                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1736                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1737                                 algs[2] = WLAN_AUTH_LEAP;
1738                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1739                                 pos = 0;
1740                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1741                                 pos = 1;
1742                         else
1743                                 pos = 2;
1744                         for (i = 0; i < num_algs; i++) {
1745                                 pos++;
1746                                 if (pos >= num_algs)
1747                                         pos = 0;
1748                                 if (algs[pos] == ifsta->auth_alg ||
1749                                     algs[pos] == 0xff)
1750                                         continue;
1751                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1752                                     !ieee80211_sta_wep_configured(dev))
1753                                         continue;
1754                                 ifsta->auth_alg = algs[pos];
1755                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1756                                        "next try\n",
1757                                        dev->name, ifsta->auth_alg);
1758                                 break;
1759                         }
1760                 }
1761                 return;
1762         }
1763
1764         switch (ifsta->auth_alg) {
1765         case WLAN_AUTH_OPEN:
1766         case WLAN_AUTH_LEAP:
1767                 ieee80211_auth_completed(dev, ifsta);
1768                 break;
1769         case WLAN_AUTH_SHARED_KEY:
1770                 if (ifsta->auth_transaction == 4)
1771                         ieee80211_auth_completed(dev, ifsta);
1772                 else
1773                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1774                 break;
1775         }
1776 }
1777
1778
1779 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1780                                      struct ieee80211_if_sta *ifsta,
1781                                      struct ieee80211_mgmt *mgmt,
1782                                      size_t len)
1783 {
1784         u16 reason_code;
1785         DECLARE_MAC_BUF(mac);
1786
1787         if (len < 24 + 2) {
1788                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1789                        "received from %s - ignored\n",
1790                        dev->name, len, print_mac(mac, mgmt->sa));
1791                 return;
1792         }
1793
1794         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1795                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1796                        "unknown AP (SA=%s BSSID=%s) - "
1797                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1798                        print_mac(mac, mgmt->bssid));
1799                 return;
1800         }
1801
1802         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1803
1804         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1805                " (reason=%d)\n",
1806                dev->name, print_mac(mac, mgmt->sa), reason_code);
1807
1808         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1809                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1810         }
1811
1812         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1813             ifsta->state == IEEE80211_ASSOCIATE ||
1814             ifsta->state == IEEE80211_ASSOCIATED) {
1815                 ifsta->state = IEEE80211_AUTHENTICATE;
1816                 mod_timer(&ifsta->timer, jiffies +
1817                                       IEEE80211_RETRY_AUTH_INTERVAL);
1818         }
1819
1820         ieee80211_set_disassoc(dev, ifsta, 1);
1821         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1822 }
1823
1824
1825 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1826                                        struct ieee80211_if_sta *ifsta,
1827                                        struct ieee80211_mgmt *mgmt,
1828                                        size_t len)
1829 {
1830         u16 reason_code;
1831         DECLARE_MAC_BUF(mac);
1832
1833         if (len < 24 + 2) {
1834                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1835                        "received from %s - ignored\n",
1836                        dev->name, len, print_mac(mac, mgmt->sa));
1837                 return;
1838         }
1839
1840         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1841                 printk(KERN_DEBUG "%s: disassociation frame received from "
1842                        "unknown AP (SA=%s BSSID=%s) - "
1843                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1844                        print_mac(mac, mgmt->bssid));
1845                 return;
1846         }
1847
1848         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1849
1850         printk(KERN_DEBUG "%s: RX disassociation from %s"
1851                " (reason=%d)\n",
1852                dev->name, print_mac(mac, mgmt->sa), reason_code);
1853
1854         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1855                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1856
1857         if (ifsta->state == IEEE80211_ASSOCIATED) {
1858                 ifsta->state = IEEE80211_ASSOCIATE;
1859                 mod_timer(&ifsta->timer, jiffies +
1860                                       IEEE80211_RETRY_AUTH_INTERVAL);
1861         }
1862
1863         ieee80211_set_disassoc(dev, ifsta, 0);
1864 }
1865
1866
1867 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1868                                          struct ieee80211_if_sta *ifsta,
1869                                          struct ieee80211_mgmt *mgmt,
1870                                          size_t len,
1871                                          int reassoc)
1872 {
1873         struct ieee80211_local *local = sdata->local;
1874         struct net_device *dev = sdata->dev;
1875         struct ieee80211_supported_band *sband;
1876         struct sta_info *sta;
1877         u64 rates, basic_rates;
1878         u16 capab_info, status_code, aid;
1879         struct ieee802_11_elems elems;
1880         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1881         u8 *pos;
1882         int i, j;
1883         DECLARE_MAC_BUF(mac);
1884         bool have_higher_than_11mbit = false;
1885
1886         /* AssocResp and ReassocResp have identical structure, so process both
1887          * of them in this function. */
1888
1889         if (ifsta->state != IEEE80211_ASSOCIATE) {
1890                 printk(KERN_DEBUG "%s: association frame received from "
1891                        "%s, but not in associate state - ignored\n",
1892                        dev->name, print_mac(mac, mgmt->sa));
1893                 return;
1894         }
1895
1896         if (len < 24 + 6) {
1897                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1898                        "received from %s - ignored\n",
1899                        dev->name, len, print_mac(mac, mgmt->sa));
1900                 return;
1901         }
1902
1903         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1904                 printk(KERN_DEBUG "%s: association frame received from "
1905                        "unknown AP (SA=%s BSSID=%s) - "
1906                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1907                        print_mac(mac, mgmt->bssid));
1908                 return;
1909         }
1910
1911         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1912         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1913         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1914
1915         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1916                "status=%d aid=%d)\n",
1917                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1918                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1919
1920         if (status_code != WLAN_STATUS_SUCCESS) {
1921                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1922                        dev->name, status_code);
1923                 /* if this was a reassociation, ensure we try a "full"
1924                  * association next time. This works around some broken APs
1925                  * which do not correctly reject reassociation requests. */
1926                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1927                 return;
1928         }
1929
1930         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1931                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1932                        "set\n", dev->name, aid);
1933         aid &= ~(BIT(15) | BIT(14));
1934
1935         pos = mgmt->u.assoc_resp.variable;
1936         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1937
1938         if (!elems.supp_rates) {
1939                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1940                        dev->name);
1941                 return;
1942         }
1943
1944         printk(KERN_DEBUG "%s: associated\n", dev->name);
1945         ifsta->aid = aid;
1946         ifsta->ap_capab = capab_info;
1947
1948         kfree(ifsta->assocresp_ies);
1949         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1950         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1951         if (ifsta->assocresp_ies)
1952                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1953
1954         rcu_read_lock();
1955
1956         /* Add STA entry for the AP */
1957         sta = sta_info_get(local, ifsta->bssid);
1958         if (!sta) {
1959                 struct ieee80211_sta_bss *bss;
1960                 int err;
1961
1962                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1963                 if (!sta) {
1964                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1965                                " the AP\n", dev->name);
1966                         rcu_read_unlock();
1967                         return;
1968                 }
1969                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1970                                            local->hw.conf.channel->center_freq,
1971                                            ifsta->ssid, ifsta->ssid_len);
1972                 if (bss) {
1973                         sta->last_rssi = bss->rssi;
1974                         sta->last_signal = bss->signal;
1975                         sta->last_noise = bss->noise;
1976                         ieee80211_rx_bss_put(dev, bss);
1977                 }
1978
1979                 err = sta_info_insert(sta);
1980                 if (err) {
1981                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1982                                " the AP (error %d)\n", dev->name, err);
1983                         rcu_read_unlock();
1984                         return;
1985                 }
1986         }
1987
1988         /*
1989          * FIXME: Do we really need to update the sta_info's information here?
1990          *        We already know about the AP (we found it in our list) so it
1991          *        should already be filled with the right info, no?
1992          *        As is stands, all this is racy because typically we assume
1993          *        the information that is filled in here (except flags) doesn't
1994          *        change while a STA structure is alive. As such, it should move
1995          *        to between the sta_info_alloc() and sta_info_insert() above.
1996          */
1997
1998         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1999                       WLAN_STA_AUTHORIZED;
2000
2001         rates = 0;
2002         basic_rates = 0;
2003         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2004
2005         for (i = 0; i < elems.supp_rates_len; i++) {
2006                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2007
2008                 if (rate > 110)
2009                         have_higher_than_11mbit = true;
2010
2011                 for (j = 0; j < sband->n_bitrates; j++) {
2012                         if (sband->bitrates[j].bitrate == rate)
2013                                 rates |= BIT(j);
2014                         if (elems.supp_rates[i] & 0x80)
2015                                 basic_rates |= BIT(j);
2016                 }
2017         }
2018
2019         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2020                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2021
2022                 if (rate > 110)
2023                         have_higher_than_11mbit = true;
2024
2025                 for (j = 0; j < sband->n_bitrates; j++) {
2026                         if (sband->bitrates[j].bitrate == rate)
2027                                 rates |= BIT(j);
2028                         if (elems.ext_supp_rates[i] & 0x80)
2029                                 basic_rates |= BIT(j);
2030                 }
2031         }
2032
2033         sta->supp_rates[local->hw.conf.channel->band] = rates;
2034         sdata->basic_rates = basic_rates;
2035
2036         /* cf. IEEE 802.11 9.2.12 */
2037         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2038             have_higher_than_11mbit)
2039                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2040         else
2041                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2042
2043         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
2044                 struct ieee80211_ht_bss_info bss_info;
2045                 ieee80211_ht_cap_ie_to_ht_info(
2046                                 (struct ieee80211_ht_cap *)
2047                                 elems.ht_cap_elem, &sta->ht_info);
2048                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2049                                 (struct ieee80211_ht_addt_info *)
2050                                 elems.ht_info_elem, &bss_info);
2051                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2052         }
2053
2054         rate_control_rate_init(sta, local);
2055
2056         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2057                 sta->flags |= WLAN_STA_WME;
2058                 rcu_read_unlock();
2059                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2060                                          elems.wmm_param_len);
2061         } else
2062                 rcu_read_unlock();
2063
2064         /* set AID and assoc capability,
2065          * ieee80211_set_associated() will tell the driver */
2066         bss_conf->aid = aid;
2067         bss_conf->assoc_capability = capab_info;
2068         ieee80211_set_associated(dev, ifsta, 1);
2069
2070         ieee80211_associated(dev, ifsta);
2071 }
2072
2073
2074 /* Caller must hold local->sta_bss_lock */
2075 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2076                                         struct ieee80211_sta_bss *bss)
2077 {
2078         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2079         u8 hash_idx;
2080
2081         if (bss_mesh_cfg(bss))
2082                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2083                                         bss_mesh_id_len(bss));
2084         else
2085                 hash_idx = STA_HASH(bss->bssid);
2086
2087         bss->hnext = local->sta_bss_hash[hash_idx];
2088         local->sta_bss_hash[hash_idx] = bss;
2089 }
2090
2091
2092 /* Caller must hold local->sta_bss_lock */
2093 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2094                                         struct ieee80211_sta_bss *bss)
2095 {
2096         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2097         struct ieee80211_sta_bss *b, *prev = NULL;
2098         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2099         while (b) {
2100                 if (b == bss) {
2101                         if (!prev)
2102                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2103                                         bss->hnext;
2104                         else
2105                                 prev->hnext = bss->hnext;
2106                         break;
2107                 }
2108                 prev = b;
2109                 b = b->hnext;
2110         }
2111 }
2112
2113
2114 static struct ieee80211_sta_bss *
2115 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2116                      u8 *ssid, u8 ssid_len)
2117 {
2118         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2119         struct ieee80211_sta_bss *bss;
2120
2121         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2122         if (!bss)
2123                 return NULL;
2124         atomic_inc(&bss->users);
2125         atomic_inc(&bss->users);
2126         memcpy(bss->bssid, bssid, ETH_ALEN);
2127         bss->freq = freq;
2128         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2129                 memcpy(bss->ssid, ssid, ssid_len);
2130                 bss->ssid_len = ssid_len;
2131         }
2132
2133         spin_lock_bh(&local->sta_bss_lock);
2134         /* TODO: order by RSSI? */
2135         list_add_tail(&bss->list, &local->sta_bss_list);
2136         __ieee80211_rx_bss_hash_add(dev, bss);
2137         spin_unlock_bh(&local->sta_bss_lock);
2138         return bss;
2139 }
2140
2141 static struct ieee80211_sta_bss *
2142 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2143                      u8 *ssid, u8 ssid_len)
2144 {
2145         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2146         struct ieee80211_sta_bss *bss;
2147
2148         spin_lock_bh(&local->sta_bss_lock);
2149         bss = local->sta_bss_hash[STA_HASH(bssid)];
2150         while (bss) {
2151                 if (!bss_mesh_cfg(bss) &&
2152                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2153                     bss->freq == freq &&
2154                     bss->ssid_len == ssid_len &&
2155                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2156                         atomic_inc(&bss->users);
2157                         break;
2158                 }
2159                 bss = bss->hnext;
2160         }
2161         spin_unlock_bh(&local->sta_bss_lock);
2162         return bss;
2163 }
2164
2165 #ifdef CONFIG_MAC80211_MESH
2166 static struct ieee80211_sta_bss *
2167 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2168                           u8 *mesh_cfg, int freq)
2169 {
2170         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2171         struct ieee80211_sta_bss *bss;
2172
2173         spin_lock_bh(&local->sta_bss_lock);
2174         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2175         while (bss) {
2176                 if (bss_mesh_cfg(bss) &&
2177                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2178                     bss->freq == freq &&
2179                     mesh_id_len == bss->mesh_id_len &&
2180                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2181                                                  mesh_id_len))) {
2182                         atomic_inc(&bss->users);
2183                         break;
2184                 }
2185                 bss = bss->hnext;
2186         }
2187         spin_unlock_bh(&local->sta_bss_lock);
2188         return bss;
2189 }
2190
2191 static struct ieee80211_sta_bss *
2192 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2193                           u8 *mesh_cfg, int mesh_config_len, int freq)
2194 {
2195         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2196         struct ieee80211_sta_bss *bss;
2197
2198         if (mesh_config_len != MESH_CFG_LEN)
2199                 return NULL;
2200
2201         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2202         if (!bss)
2203                 return NULL;
2204
2205         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2206         if (!bss->mesh_cfg) {
2207                 kfree(bss);
2208                 return NULL;
2209         }
2210
2211         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2212                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2213                 if (!bss->mesh_id) {
2214                         kfree(bss->mesh_cfg);
2215                         kfree(bss);
2216                         return NULL;
2217                 }
2218                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2219         }
2220
2221         atomic_inc(&bss->users);
2222         atomic_inc(&bss->users);
2223         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2224         bss->mesh_id_len = mesh_id_len;
2225         bss->freq = freq;
2226         spin_lock_bh(&local->sta_bss_lock);
2227         /* TODO: order by RSSI? */
2228         list_add_tail(&bss->list, &local->sta_bss_list);
2229         __ieee80211_rx_bss_hash_add(dev, bss);
2230         spin_unlock_bh(&local->sta_bss_lock);
2231         return bss;
2232 }
2233 #endif
2234
2235 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2236 {
2237         kfree(bss->wpa_ie);
2238         kfree(bss->rsn_ie);
2239         kfree(bss->wmm_ie);
2240         kfree(bss->ht_ie);
2241         kfree(bss_mesh_id(bss));
2242         kfree(bss_mesh_cfg(bss));
2243         kfree(bss);
2244 }
2245
2246
2247 static void ieee80211_rx_bss_put(struct net_device *dev,
2248                                  struct ieee80211_sta_bss *bss)
2249 {
2250         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2251         if (!atomic_dec_and_test(&bss->users))
2252                 return;
2253
2254         spin_lock_bh(&local->sta_bss_lock);
2255         __ieee80211_rx_bss_hash_del(dev, bss);
2256         list_del(&bss->list);
2257         spin_unlock_bh(&local->sta_bss_lock);
2258         ieee80211_rx_bss_free(bss);
2259 }
2260
2261
2262 void ieee80211_rx_bss_list_init(struct net_device *dev)
2263 {
2264         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2265         spin_lock_init(&local->sta_bss_lock);
2266         INIT_LIST_HEAD(&local->sta_bss_list);
2267 }
2268
2269
2270 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2271 {
2272         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2273         struct ieee80211_sta_bss *bss, *tmp;
2274
2275         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2276                 ieee80211_rx_bss_put(dev, bss);
2277 }
2278
2279
2280 static int ieee80211_sta_join_ibss(struct net_device *dev,
2281                                    struct ieee80211_if_sta *ifsta,
2282                                    struct ieee80211_sta_bss *bss)
2283 {
2284         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2285         int res, rates, i, j;
2286         struct sk_buff *skb;
2287         struct ieee80211_mgmt *mgmt;
2288         struct ieee80211_tx_control control;
2289         struct rate_selection ratesel;
2290         u8 *pos;
2291         struct ieee80211_sub_if_data *sdata;
2292         struct ieee80211_supported_band *sband;
2293
2294         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2295
2296         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2297
2298         /* Remove possible STA entries from other IBSS networks. */
2299         sta_info_flush_delayed(sdata);
2300
2301         if (local->ops->reset_tsf) {
2302                 /* Reset own TSF to allow time synchronization work. */
2303                 local->ops->reset_tsf(local_to_hw(local));
2304         }
2305         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2306         res = ieee80211_if_config(dev);
2307         if (res)
2308                 return res;
2309
2310         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2311
2312         sdata->drop_unencrypted = bss->capability &
2313                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2314
2315         res = ieee80211_set_freq(local, bss->freq);
2316
2317         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2318                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2319                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2320                 return -1;
2321         }
2322
2323         /* Set beacon template */
2324         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2325         do {
2326                 if (!skb)
2327                         break;
2328
2329                 skb_reserve(skb, local->hw.extra_tx_headroom);
2330
2331                 mgmt = (struct ieee80211_mgmt *)
2332                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2333                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2334                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2335                                                    IEEE80211_STYPE_BEACON);
2336                 memset(mgmt->da, 0xff, ETH_ALEN);
2337                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2338                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2339                 mgmt->u.beacon.beacon_int =
2340                         cpu_to_le16(local->hw.conf.beacon_int);
2341                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2342
2343                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2344                 *pos++ = WLAN_EID_SSID;
2345                 *pos++ = ifsta->ssid_len;
2346                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2347
2348                 rates = bss->supp_rates_len;
2349                 if (rates > 8)
2350                         rates = 8;
2351                 pos = skb_put(skb, 2 + rates);
2352                 *pos++ = WLAN_EID_SUPP_RATES;
2353                 *pos++ = rates;
2354                 memcpy(pos, bss->supp_rates, rates);
2355
2356                 if (bss->band == IEEE80211_BAND_2GHZ) {
2357                         pos = skb_put(skb, 2 + 1);
2358                         *pos++ = WLAN_EID_DS_PARAMS;
2359                         *pos++ = 1;
2360                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2361                 }
2362
2363                 pos = skb_put(skb, 2 + 2);
2364                 *pos++ = WLAN_EID_IBSS_PARAMS;
2365                 *pos++ = 2;
2366                 /* FIX: set ATIM window based on scan results */
2367                 *pos++ = 0;
2368                 *pos++ = 0;
2369
2370                 if (bss->supp_rates_len > 8) {
2371                         rates = bss->supp_rates_len - 8;
2372                         pos = skb_put(skb, 2 + rates);
2373                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2374                         *pos++ = rates;
2375                         memcpy(pos, &bss->supp_rates[8], rates);
2376                 }
2377
2378                 memset(&control, 0, sizeof(control));
2379                 rate_control_get_rate(dev, sband, skb, &ratesel);
2380                 if (!ratesel.rate) {
2381                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2382                                "for IBSS beacon\n", dev->name);
2383                         break;
2384                 }
2385                 control.vif = &sdata->vif;
2386                 control.tx_rate = ratesel.rate;
2387                 if (sdata->bss_conf.use_short_preamble &&
2388                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2389                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2390                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2391                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2392                 control.retry_limit = 1;
2393
2394                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2395                 if (ifsta->probe_resp) {
2396                         mgmt = (struct ieee80211_mgmt *)
2397                                 ifsta->probe_resp->data;
2398                         mgmt->frame_control =
2399                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2400                                              IEEE80211_STYPE_PROBE_RESP);
2401                 } else {
2402                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2403                                "template for IBSS\n", dev->name);
2404                 }
2405
2406                 if (local->ops->beacon_update &&
2407                     local->ops->beacon_update(local_to_hw(local),
2408                                              skb, &control) == 0) {
2409                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2410                                "template\n", dev->name);
2411                         skb = NULL;
2412                 }
2413
2414                 rates = 0;
2415                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2416                 for (i = 0; i < bss->supp_rates_len; i++) {
2417                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2418                         for (j = 0; j < sband->n_bitrates; j++)
2419                                 if (sband->bitrates[j].bitrate == bitrate)
2420                                         rates |= BIT(j);
2421                 }
2422                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2423
2424                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2425         } while (0);
2426
2427         if (skb) {
2428                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2429                        "template\n", dev->name);
2430                 dev_kfree_skb(skb);
2431         }
2432
2433         ifsta->state = IEEE80211_IBSS_JOINED;
2434         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2435
2436         ieee80211_rx_bss_put(dev, bss);
2437
2438         return res;
2439 }
2440
2441 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2442                             struct ieee802_11_elems *elems,
2443                             enum ieee80211_band band)
2444 {
2445         struct ieee80211_supported_band *sband;
2446         struct ieee80211_rate *bitrates;
2447         size_t num_rates;
2448         u64 supp_rates;
2449         int i, j;
2450         sband = local->hw.wiphy->bands[band];
2451
2452         if (!sband) {
2453                 WARN_ON(1);
2454                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2455         }
2456
2457         bitrates = sband->bitrates;
2458         num_rates = sband->n_bitrates;
2459         supp_rates = 0;
2460         for (i = 0; i < elems->supp_rates_len +
2461                      elems->ext_supp_rates_len; i++) {
2462                 u8 rate = 0;
2463                 int own_rate;
2464                 if (i < elems->supp_rates_len)
2465                         rate = elems->supp_rates[i];
2466                 else if (elems->ext_supp_rates)
2467                         rate = elems->ext_supp_rates
2468                                 [i - elems->supp_rates_len];
2469                 own_rate = 5 * (rate & 0x7f);
2470                 for (j = 0; j < num_rates; j++)
2471                         if (bitrates[j].bitrate == own_rate)
2472                                 supp_rates |= BIT(j);
2473         }
2474         return supp_rates;
2475 }
2476
2477
2478 static void ieee80211_rx_bss_info(struct net_device *dev,
2479                                   struct ieee80211_mgmt *mgmt,
2480                                   size_t len,
2481                                   struct ieee80211_rx_status *rx_status,
2482                                   int beacon)
2483 {
2484         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2485         struct ieee802_11_elems elems;
2486         size_t baselen;
2487         int freq, clen;
2488         struct ieee80211_sta_bss *bss;
2489         struct sta_info *sta;
2490         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2491         u64 beacon_timestamp, rx_timestamp;
2492         struct ieee80211_channel *channel;
2493         DECLARE_MAC_BUF(mac);
2494         DECLARE_MAC_BUF(mac2);
2495
2496         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2497                 return; /* ignore ProbeResp to foreign address */
2498
2499 #if 0
2500         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2501                dev->name, beacon ? "Beacon" : "Probe Response",
2502                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2503 #endif
2504
2505         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2506         if (baselen > len)
2507                 return;
2508
2509         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2510         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2511
2512         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2513             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2514                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2515                                                 rx_status->band);
2516
2517                 mesh_neighbour_update(mgmt->sa, rates, dev,
2518                                       mesh_peer_accepts_plinks(&elems, dev));
2519         }
2520
2521         rcu_read_lock();
2522
2523         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2524             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2525             (sta = sta_info_get(local, mgmt->sa))) {
2526                 u64 prev_rates;
2527                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2528                                                         rx_status->band);
2529
2530                 prev_rates = sta->supp_rates[rx_status->band];
2531                 sta->supp_rates[rx_status->band] &= supp_rates;
2532                 if (sta->supp_rates[rx_status->band] == 0) {
2533                         /* No matching rates - this should not really happen.
2534                          * Make sure that at least one rate is marked
2535                          * supported to avoid issues with TX rate ctrl. */
2536                         sta->supp_rates[rx_status->band] =
2537                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2538                 }
2539                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2540                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2541                                "%s based on beacon info (0x%llx & 0x%llx -> "
2542                                "0x%llx)\n",
2543                                dev->name, print_mac(mac, sta->addr),
2544                                (unsigned long long) prev_rates,
2545                                (unsigned long long) supp_rates,
2546                                (unsigned long long) sta->supp_rates[rx_status->band]);
2547                 }
2548         }
2549
2550         rcu_read_unlock();
2551
2552         if (elems.ds_params && elems.ds_params_len == 1)
2553                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2554         else
2555                 freq = rx_status->freq;
2556
2557         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2558
2559         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2560                 return;
2561
2562 #ifdef CONFIG_MAC80211_MESH
2563         if (elems.mesh_config)
2564                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2565                                 elems.mesh_id_len, elems.mesh_config, freq);
2566         else
2567 #endif
2568                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2569                                            elems.ssid, elems.ssid_len);
2570         if (!bss) {
2571 #ifdef CONFIG_MAC80211_MESH
2572                 if (elems.mesh_config)
2573                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2574                                 elems.mesh_id_len, elems.mesh_config,
2575                                 elems.mesh_config_len, freq);
2576                 else
2577 #endif
2578                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2579                                                    elems.ssid, elems.ssid_len);
2580                 if (!bss)
2581                         return;
2582         } else {
2583 #if 0
2584                 /* TODO: order by RSSI? */
2585                 spin_lock_bh(&local->sta_bss_lock);
2586                 list_move_tail(&bss->list, &local->sta_bss_list);
2587                 spin_unlock_bh(&local->sta_bss_lock);
2588 #endif
2589         }
2590
2591         /* save the ERP value so that it is available at association time */
2592         if (elems.erp_info && elems.erp_info_len >= 1) {
2593                 bss->erp_value = elems.erp_info[0];
2594                 bss->has_erp_value = 1;
2595         }
2596
2597         if (elems.ht_cap_elem &&
2598              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2599              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2600                 kfree(bss->ht_ie);
2601                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2602                 if (bss->ht_ie) {
2603                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2604                                 elems.ht_cap_elem_len + 2);
2605                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2606                 } else
2607                         bss->ht_ie_len = 0;
2608         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2609                 kfree(bss->ht_ie);
2610                 bss->ht_ie = NULL;
2611                 bss->ht_ie_len = 0;
2612         }
2613
2614         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2615         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2616
2617         bss->supp_rates_len = 0;
2618         if (elems.supp_rates) {
2619                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2620                 if (clen > elems.supp_rates_len)
2621                         clen = elems.supp_rates_len;
2622                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2623                        clen);
2624                 bss->supp_rates_len += clen;
2625         }
2626         if (elems.ext_supp_rates) {
2627                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2628                 if (clen > elems.ext_supp_rates_len)
2629                         clen = elems.ext_supp_rates_len;
2630                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2631                        elems.ext_supp_rates, clen);
2632                 bss->supp_rates_len += clen;
2633         }
2634
2635         bss->band = rx_status->band;
2636
2637         bss->timestamp = beacon_timestamp;
2638         bss->last_update = jiffies;
2639         bss->rssi = rx_status->ssi;
2640         bss->signal = rx_status->signal;
2641         bss->noise = rx_status->noise;
2642         if (!beacon && !bss->probe_resp)
2643                 bss->probe_resp = true;
2644
2645         /*
2646          * In STA mode, the remaining parameters should not be overridden
2647          * by beacons because they're not necessarily accurate there.
2648          */
2649         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2650             bss->probe_resp && beacon) {
2651                 ieee80211_rx_bss_put(dev, bss);
2652                 return;
2653         }
2654
2655         if (elems.wpa &&
2656             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2657              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2658                 kfree(bss->wpa_ie);
2659                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2660                 if (bss->wpa_ie) {
2661                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2662                         bss->wpa_ie_len = elems.wpa_len + 2;
2663                 } else
2664                         bss->wpa_ie_len = 0;
2665         } else if (!elems.wpa && bss->wpa_ie) {
2666                 kfree(bss->wpa_ie);
2667                 bss->wpa_ie = NULL;
2668                 bss->wpa_ie_len = 0;
2669         }
2670
2671         if (elems.rsn &&
2672             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2673              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2674                 kfree(bss->rsn_ie);
2675                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2676                 if (bss->rsn_ie) {
2677                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2678                         bss->rsn_ie_len = elems.rsn_len + 2;
2679                 } else
2680                         bss->rsn_ie_len = 0;
2681         } else if (!elems.rsn && bss->rsn_ie) {
2682                 kfree(bss->rsn_ie);
2683                 bss->rsn_ie = NULL;
2684                 bss->rsn_ie_len = 0;
2685         }
2686
2687         /*
2688          * Cf.
2689          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2690          *
2691          * quoting:
2692          *
2693          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2694          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2695          * Alliance (September 1, 2004) is incorporated by reference herein.
2696          * The inclusion of the WMM Parameters in probe responses and
2697          * association responses is mandatory for WMM enabled networks. The
2698          * inclusion of the WMM Parameters in beacons, however, is optional.
2699          */
2700
2701         if (elems.wmm_param &&
2702             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2703              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2704                 kfree(bss->wmm_ie);
2705                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2706                 if (bss->wmm_ie) {
2707                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2708                                elems.wmm_param_len + 2);
2709                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2710                 } else
2711                         bss->wmm_ie_len = 0;
2712         } else if (!elems.wmm_param && bss->wmm_ie) {
2713                 kfree(bss->wmm_ie);
2714                 bss->wmm_ie = NULL;
2715                 bss->wmm_ie_len = 0;
2716         }
2717
2718         /* check if we need to merge IBSS */
2719         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2720             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2721             bss->capability & WLAN_CAPABILITY_IBSS &&
2722             bss->freq == local->oper_channel->center_freq &&
2723             elems.ssid_len == sdata->u.sta.ssid_len &&
2724             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2725                 if (rx_status->flag & RX_FLAG_TSFT) {
2726                         /* in order for correct IBSS merging we need mactime
2727                          *
2728                          * since mactime is defined as the time the first data
2729                          * symbol of the frame hits the PHY, and the timestamp
2730                          * of the beacon is defined as "the time that the data
2731                          * symbol containing the first bit of the timestamp is
2732                          * transmitted to the PHY plus the transmitting STA’s
2733                          * delays through its local PHY from the MAC-PHY
2734                          * interface to its interface with the WM"
2735                          * (802.11 11.1.2) - equals the time this bit arrives at
2736                          * the receiver - we have to take into account the
2737                          * offset between the two.
2738                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2739                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2740                          */
2741                         int rate = local->hw.wiphy->bands[rx_status->band]->
2742                                         bitrates[rx_status->rate_idx].bitrate;
2743                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2744                 } else if (local && local->ops && local->ops->get_tsf)
2745                         /* second best option: get current TSF */
2746                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2747                 else
2748                         /* can't merge without knowing the TSF */
2749                         rx_timestamp = -1LLU;
2750 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2751                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2752                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2753                        print_mac(mac, mgmt->sa),
2754                        print_mac(mac2, mgmt->bssid),
2755                        (unsigned long long)rx_timestamp,
2756                        (unsigned long long)beacon_timestamp,
2757                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2758                        jiffies);
2759 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2760                 if (beacon_timestamp > rx_timestamp) {
2761 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2762                         if (net_ratelimit())
2763 #endif
2764                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2765                                        "local TSF - IBSS merge with BSSID %s\n",
2766                                        dev->name, print_mac(mac, mgmt->bssid));
2767                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2768                         ieee80211_ibss_add_sta(dev, NULL,
2769                                                mgmt->bssid, mgmt->sa);
2770                 }
2771         }
2772
2773         ieee80211_rx_bss_put(dev, bss);
2774 }
2775
2776
2777 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2778                                          struct ieee80211_mgmt *mgmt,
2779                                          size_t len,
2780                                          struct ieee80211_rx_status *rx_status)
2781 {
2782         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2783 }
2784
2785
2786 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2787                                      struct ieee80211_mgmt *mgmt,
2788                                      size_t len,
2789                                      struct ieee80211_rx_status *rx_status)
2790 {
2791         struct ieee80211_sub_if_data *sdata;
2792         struct ieee80211_if_sta *ifsta;
2793         size_t baselen;
2794         struct ieee802_11_elems elems;
2795         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2796         struct ieee80211_conf *conf = &local->hw.conf;
2797         u32 changed = 0;
2798
2799         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2800
2801         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2802         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2803                 return;
2804         ifsta = &sdata->u.sta;
2805
2806         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2807             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2808                 return;
2809
2810         /* Process beacon from the current BSS */
2811         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2812         if (baselen > len)
2813                 return;
2814
2815         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2816
2817         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2818                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2819                                          elems.wmm_param_len);
2820         }
2821
2822         /* Do not send changes to driver if we are scanning. This removes
2823          * requirement that driver's bss_info_changed function needs to be
2824          * atomic. */
2825         if (local->sta_sw_scanning || local->sta_hw_scanning)
2826                 return;
2827
2828         if (elems.erp_info && elems.erp_info_len >= 1)
2829                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2830         else {
2831                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2832                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2833                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2834         }
2835
2836         if (elems.ht_cap_elem && elems.ht_info_elem &&
2837             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2838                 struct ieee80211_ht_bss_info bss_info;
2839
2840                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2841                                 (struct ieee80211_ht_addt_info *)
2842                                 elems.ht_info_elem, &bss_info);
2843                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2844                                                &bss_info);
2845         }
2846
2847         ieee80211_bss_info_change_notify(sdata, changed);
2848 }
2849
2850
2851 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2852                                         struct ieee80211_if_sta *ifsta,
2853                                         struct ieee80211_mgmt *mgmt,
2854                                         size_t len,
2855                                         struct ieee80211_rx_status *rx_status)
2856 {
2857         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2858         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2859         int tx_last_beacon;
2860         struct sk_buff *skb;
2861         struct ieee80211_mgmt *resp;
2862         u8 *pos, *end;
2863         DECLARE_MAC_BUF(mac);
2864 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2865         DECLARE_MAC_BUF(mac2);
2866         DECLARE_MAC_BUF(mac3);
2867 #endif
2868
2869         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2870             ifsta->state != IEEE80211_IBSS_JOINED ||
2871             len < 24 + 2 || !ifsta->probe_resp)
2872                 return;
2873
2874         if (local->ops->tx_last_beacon)
2875                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2876         else
2877                 tx_last_beacon = 1;
2878
2879 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2880         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2881                "%s (tx_last_beacon=%d)\n",
2882                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2883                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2884 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2885
2886         if (!tx_last_beacon)
2887                 return;
2888
2889         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2890             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2891                 return;
2892
2893         end = ((u8 *) mgmt) + len;
2894         pos = mgmt->u.probe_req.variable;
2895         if (pos[0] != WLAN_EID_SSID ||
2896             pos + 2 + pos[1] > end) {
2897                 if (net_ratelimit()) {
2898                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2899                                "from %s\n",
2900                                dev->name, print_mac(mac, mgmt->sa));
2901                 }
2902                 return;
2903         }
2904         if (pos[1] != 0 &&
2905             (pos[1] != ifsta->ssid_len ||
2906              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2907                 /* Ignore ProbeReq for foreign SSID */
2908                 return;
2909         }
2910
2911         /* Reply with ProbeResp */
2912         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2913         if (!skb)
2914                 return;
2915
2916         resp = (struct ieee80211_mgmt *) skb->data;
2917         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2918 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2919         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2920                dev->name, print_mac(mac, resp->da));
2921 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2922         ieee80211_sta_tx(dev, skb, 0);
2923 }
2924
2925 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2926                                      struct ieee80211_if_sta *ifsta,
2927                                      struct ieee80211_mgmt *mgmt,
2928                                      size_t len,
2929                                      struct ieee80211_rx_status *rx_status)
2930 {
2931         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2932
2933         if (len < IEEE80211_MIN_ACTION_SIZE)
2934                 return;
2935
2936         switch (mgmt->u.action.category) {
2937         case WLAN_CATEGORY_BACK:
2938                 switch (mgmt->u.action.u.addba_req.action_code) {
2939                 case WLAN_ACTION_ADDBA_REQ:
2940                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2941                                    sizeof(mgmt->u.action.u.addba_req)))
2942                                 break;
2943                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2944                         break;
2945                 case WLAN_ACTION_ADDBA_RESP:
2946                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2947                                    sizeof(mgmt->u.action.u.addba_resp)))
2948                                 break;
2949                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2950                         break;
2951                 case WLAN_ACTION_DELBA:
2952                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2953                                    sizeof(mgmt->u.action.u.delba)))
2954                                 break;
2955                         ieee80211_sta_process_delba(dev, mgmt, len);
2956                         break;
2957                 default:
2958                         if (net_ratelimit())
2959                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2960                                         dev->name);
2961                         break;
2962                 }
2963                 break;
2964         case PLINK_CATEGORY:
2965                 if (ieee80211_vif_is_mesh(&sdata->vif))
2966                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2967                 break;
2968         case MESH_PATH_SEL_CATEGORY:
2969                 if (ieee80211_vif_is_mesh(&sdata->vif))
2970                         mesh_rx_path_sel_frame(dev, mgmt, len);
2971                 break;
2972         default:
2973                 if (net_ratelimit())
2974                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
2975                         "category=%d\n", dev->name, mgmt->u.action.category);
2976                 break;
2977         }
2978 }
2979
2980 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2981                            struct ieee80211_rx_status *rx_status)
2982 {
2983         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2984         struct ieee80211_sub_if_data *sdata;
2985         struct ieee80211_if_sta *ifsta;
2986         struct ieee80211_mgmt *mgmt;
2987         u16 fc;
2988
2989         if (skb->len < 24)
2990                 goto fail;
2991
2992         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2993         ifsta = &sdata->u.sta;
2994
2995         mgmt = (struct ieee80211_mgmt *) skb->data;
2996         fc = le16_to_cpu(mgmt->frame_control);
2997
2998         switch (fc & IEEE80211_FCTL_STYPE) {
2999         case IEEE80211_STYPE_PROBE_REQ:
3000         case IEEE80211_STYPE_PROBE_RESP:
3001         case IEEE80211_STYPE_BEACON:
3002         case IEEE80211_STYPE_ACTION:
3003                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3004         case IEEE80211_STYPE_AUTH:
3005         case IEEE80211_STYPE_ASSOC_RESP:
3006         case IEEE80211_STYPE_REASSOC_RESP:
3007         case IEEE80211_STYPE_DEAUTH:
3008         case IEEE80211_STYPE_DISASSOC:
3009                 skb_queue_tail(&ifsta->skb_queue, skb);
3010                 queue_work(local->hw.workqueue, &ifsta->work);
3011                 return;
3012         default:
3013                 printk(KERN_DEBUG "%s: received unknown management frame - "
3014                        "stype=%d\n", dev->name,
3015                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3016                 break;
3017         }
3018
3019  fail:
3020         kfree_skb(skb);
3021 }
3022
3023
3024 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3025                                          struct sk_buff *skb)
3026 {
3027         struct ieee80211_rx_status *rx_status;
3028         struct ieee80211_sub_if_data *sdata;
3029         struct ieee80211_if_sta *ifsta;
3030         struct ieee80211_mgmt *mgmt;
3031         u16 fc;
3032
3033         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3034         ifsta = &sdata->u.sta;
3035
3036         rx_status = (struct ieee80211_rx_status *) skb->cb;
3037         mgmt = (struct ieee80211_mgmt *) skb->data;
3038         fc = le16_to_cpu(mgmt->frame_control);
3039
3040         switch (fc & IEEE80211_FCTL_STYPE) {
3041         case IEEE80211_STYPE_PROBE_REQ:
3042                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3043                                             rx_status);
3044                 break;
3045         case IEEE80211_STYPE_PROBE_RESP:
3046                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3047                 break;
3048         case IEEE80211_STYPE_BEACON:
3049                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3050                 break;
3051         case IEEE80211_STYPE_AUTH:
3052                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3053                 break;
3054         case IEEE80211_STYPE_ASSOC_RESP:
3055                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3056                 break;
3057         case IEEE80211_STYPE_REASSOC_RESP:
3058                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3059                 break;
3060         case IEEE80211_STYPE_DEAUTH:
3061                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3062                 break;
3063         case IEEE80211_STYPE_DISASSOC:
3064                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3065                 break;
3066         case IEEE80211_STYPE_ACTION:
3067                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3068                 break;
3069         }
3070
3071         kfree_skb(skb);
3072 }
3073
3074
3075 ieee80211_rx_result
3076 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3077                       struct ieee80211_rx_status *rx_status)
3078 {
3079         struct ieee80211_mgmt *mgmt;
3080         u16 fc;
3081
3082         if (skb->len < 2)
3083                 return RX_DROP_UNUSABLE;
3084
3085         mgmt = (struct ieee80211_mgmt *) skb->data;
3086         fc = le16_to_cpu(mgmt->frame_control);
3087
3088         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3089                 return RX_CONTINUE;
3090
3091         if (skb->len < 24)
3092                 return RX_DROP_MONITOR;
3093
3094         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3095                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3096                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3097                                                      skb->len, rx_status);
3098                         dev_kfree_skb(skb);
3099                         return RX_QUEUED;
3100                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3101                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3102                                                  rx_status);
3103                         dev_kfree_skb(skb);
3104                         return RX_QUEUED;
3105                 }
3106         }
3107         return RX_CONTINUE;
3108 }
3109
3110
3111 static int ieee80211_sta_active_ibss(struct net_device *dev)
3112 {
3113         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3114         int active = 0;
3115         struct sta_info *sta;
3116         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3117
3118         rcu_read_lock();
3119
3120         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3121                 if (sta->sdata == sdata &&
3122                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3123                                jiffies)) {
3124                         active++;
3125                         break;
3126                 }
3127         }
3128
3129         rcu_read_unlock();
3130
3131         return active;
3132 }
3133
3134
3135 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3136 {
3137         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3138         struct sta_info *sta, *tmp;
3139         LIST_HEAD(tmp_list);
3140         DECLARE_MAC_BUF(mac);
3141         unsigned long flags;
3142
3143         spin_lock_irqsave(&local->sta_lock, flags);
3144         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3145                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3146                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3147                                dev->name, print_mac(mac, sta->addr));
3148                         __sta_info_unlink(&sta);
3149                         if (sta)
3150                                 list_add(&sta->list, &tmp_list);
3151                 }
3152         spin_unlock_irqrestore(&local->sta_lock, flags);
3153
3154         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3155                 sta_info_destroy(sta);
3156 }
3157
3158
3159 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3160                                      struct ieee80211_if_sta *ifsta)
3161 {
3162         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3163
3164         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3165         if (ieee80211_sta_active_ibss(dev))
3166                 return;
3167
3168         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3169                "IBSS networks with same SSID (merge)\n", dev->name);
3170         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3171 }
3172
3173
3174 #ifdef CONFIG_MAC80211_MESH
3175 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3176                            struct ieee80211_if_sta *ifsta)
3177 {
3178         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3179         bool free_plinks;
3180
3181         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3182         mesh_path_expire(dev);
3183
3184         free_plinks = mesh_plink_availables(sdata);
3185         if (free_plinks != sdata->u.sta.accepting_plinks)
3186                 ieee80211_if_config_beacon(dev);
3187
3188         mod_timer(&ifsta->timer, jiffies +
3189                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3190 }
3191
3192
3193 void ieee80211_start_mesh(struct net_device *dev)
3194 {
3195         struct ieee80211_if_sta *ifsta;
3196         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3197         ifsta = &sdata->u.sta;
3198         ifsta->state = IEEE80211_MESH_UP;
3199         ieee80211_sta_timer((unsigned long)sdata);
3200 }
3201 #endif
3202
3203
3204 void ieee80211_sta_timer(unsigned long data)
3205 {
3206         struct ieee80211_sub_if_data *sdata =
3207                 (struct ieee80211_sub_if_data *) data;
3208         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3209         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3210
3211         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3212         queue_work(local->hw.workqueue, &ifsta->work);
3213 }
3214
3215 void ieee80211_sta_work(struct work_struct *work)
3216 {
3217         struct ieee80211_sub_if_data *sdata =
3218                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3219         struct net_device *dev = sdata->dev;
3220         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3221         struct ieee80211_if_sta *ifsta;
3222         struct sk_buff *skb;
3223
3224         if (!netif_running(dev))
3225                 return;
3226
3227         if (local->sta_sw_scanning || local->sta_hw_scanning)
3228                 return;
3229
3230         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3231             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3232             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3233                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3234                        "(type=%d)\n", dev->name, sdata->vif.type);
3235                 return;
3236         }
3237         ifsta = &sdata->u.sta;
3238
3239         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3240                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3241
3242 #ifdef CONFIG_MAC80211_MESH
3243         if (ifsta->preq_queue_len &&
3244             time_after(jiffies,
3245                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3246                 mesh_path_start_discovery(dev);
3247 #endif
3248
3249         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3250             ifsta->state != IEEE80211_ASSOCIATE &&
3251             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3252                 if (ifsta->scan_ssid_len)
3253                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3254                 else
3255                         ieee80211_sta_start_scan(dev, NULL, 0);
3256                 return;
3257         }
3258
3259         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3260                 if (ieee80211_sta_config_auth(dev, ifsta))
3261                         return;
3262                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3263         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3264                 return;
3265
3266         switch (ifsta->state) {
3267         case IEEE80211_DISABLED:
3268                 break;
3269         case IEEE80211_AUTHENTICATE:
3270                 ieee80211_authenticate(dev, ifsta);
3271                 break;
3272         case IEEE80211_ASSOCIATE:
3273                 ieee80211_associate(dev, ifsta);
3274                 break;
3275         case IEEE80211_ASSOCIATED:
3276                 ieee80211_associated(dev, ifsta);
3277                 break;
3278         case IEEE80211_IBSS_SEARCH:
3279                 ieee80211_sta_find_ibss(dev, ifsta);
3280                 break;
3281         case IEEE80211_IBSS_JOINED:
3282                 ieee80211_sta_merge_ibss(dev, ifsta);
3283                 break;
3284 #ifdef CONFIG_MAC80211_MESH
3285         case IEEE80211_MESH_UP:
3286                 ieee80211_mesh_housekeeping(dev, ifsta);
3287                 break;
3288 #endif
3289         default:
3290                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3291                        ifsta->state);
3292                 break;
3293         }
3294
3295         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3296                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3297                        "mixed-cell disabled - disassociate\n", dev->name);
3298
3299                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3300                 ieee80211_set_disassoc(dev, ifsta, 0);
3301         }
3302 }
3303
3304
3305 static void ieee80211_sta_reset_auth(struct net_device *dev,
3306                                      struct ieee80211_if_sta *ifsta)
3307 {
3308         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3309
3310         if (local->ops->reset_tsf) {
3311                 /* Reset own TSF to allow time synchronization work. */
3312                 local->ops->reset_tsf(local_to_hw(local));
3313         }
3314
3315         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3316
3317
3318         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3319                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3320         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3321                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3322         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3323                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3324         else
3325                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3326         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3327                ifsta->auth_alg);
3328         ifsta->auth_transaction = -1;
3329         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3330         ifsta->auth_tries = ifsta->assoc_tries = 0;
3331         netif_carrier_off(dev);
3332 }
3333
3334
3335 void ieee80211_sta_req_auth(struct net_device *dev,
3336                             struct ieee80211_if_sta *ifsta)
3337 {
3338         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3339         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3340
3341         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3342                 return;
3343
3344         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3345                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3346             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3347                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3348                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3349                 queue_work(local->hw.workqueue, &ifsta->work);
3350         }
3351 }
3352
3353 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3354                                     const char *ssid, int ssid_len)
3355 {
3356         int tmp, hidden_ssid;
3357
3358         if (ssid_len == ifsta->ssid_len &&
3359             !memcmp(ifsta->ssid, ssid, ssid_len))
3360                 return 1;
3361
3362         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3363                 return 0;
3364
3365         hidden_ssid = 1;
3366         tmp = ssid_len;
3367         while (tmp--) {
3368                 if (ssid[tmp] != '\0') {
3369                         hidden_ssid = 0;
3370                         break;
3371                 }
3372         }
3373
3374         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3375                 return 1;
3376
3377         if (ssid_len == 1 && ssid[0] == ' ')
3378                 return 1;
3379
3380         return 0;
3381 }
3382
3383 static int ieee80211_sta_config_auth(struct net_device *dev,
3384                                      struct ieee80211_if_sta *ifsta)
3385 {
3386         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3387         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3388         struct ieee80211_sta_bss *bss, *selected = NULL;
3389         int top_rssi = 0, freq;
3390
3391         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3392             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3393                 ifsta->state = IEEE80211_AUTHENTICATE;
3394                 ieee80211_sta_reset_auth(dev, ifsta);
3395                 return 0;
3396         }
3397
3398         spin_lock_bh(&local->sta_bss_lock);
3399         freq = local->oper_channel->center_freq;
3400         list_for_each_entry(bss, &local->sta_bss_list, list) {
3401                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3402                         continue;
3403
3404                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3405                     !!sdata->default_key)
3406                         continue;
3407
3408                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3409                     bss->freq != freq)
3410                         continue;
3411
3412                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3413                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3414                         continue;
3415
3416                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3417                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3418                         continue;
3419
3420                 if (!selected || top_rssi < bss->rssi) {
3421                         selected = bss;
3422                         top_rssi = bss->rssi;
3423                 }
3424         }
3425         if (selected)
3426                 atomic_inc(&selected->users);
3427         spin_unlock_bh(&local->sta_bss_lock);
3428
3429         if (selected) {
3430                 ieee80211_set_freq(local, selected->freq);
3431                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3432                         ieee80211_sta_set_ssid(dev, selected->ssid,
3433                                                selected->ssid_len);
3434                 ieee80211_sta_set_bssid(dev, selected->bssid);
3435                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3436                 ieee80211_rx_bss_put(dev, selected);
3437                 ifsta->state = IEEE80211_AUTHENTICATE;
3438                 ieee80211_sta_reset_auth(dev, ifsta);
3439                 return 0;
3440         } else {
3441                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3442                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3443                                 ieee80211_sta_start_scan(dev, NULL, 0);
3444                         else
3445                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3446                                                          ifsta->ssid_len);
3447                         ifsta->state = IEEE80211_AUTHENTICATE;
3448                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3449                 } else
3450                         ifsta->state = IEEE80211_DISABLED;
3451         }
3452         return -1;
3453 }
3454
3455
3456 static int ieee80211_sta_create_ibss(struct net_device *dev,
3457                                      struct ieee80211_if_sta *ifsta)
3458 {
3459         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3460         struct ieee80211_sta_bss *bss;
3461         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3462         struct ieee80211_supported_band *sband;
3463         u8 bssid[ETH_ALEN], *pos;
3464         int i;
3465         DECLARE_MAC_BUF(mac);
3466
3467 #if 0
3468         /* Easier testing, use fixed BSSID. */
3469         memset(bssid, 0xfe, ETH_ALEN);
3470 #else
3471         /* Generate random, not broadcast, locally administered BSSID. Mix in
3472          * own MAC address to make sure that devices that do not have proper
3473          * random number generator get different BSSID. */
3474         get_random_bytes(bssid, ETH_ALEN);
3475         for (i = 0; i < ETH_ALEN; i++)
3476                 bssid[i] ^= dev->dev_addr[i];
3477         bssid[0] &= ~0x01;
3478         bssid[0] |= 0x02;
3479 #endif
3480
3481         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3482                dev->name, print_mac(mac, bssid));
3483
3484         bss = ieee80211_rx_bss_add(dev, bssid,
3485                                    local->hw.conf.channel->center_freq,
3486                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3487         if (!bss)
3488                 return -ENOMEM;
3489
3490         bss->band = local->hw.conf.channel->band;
3491         sband = local->hw.wiphy->bands[bss->band];
3492
3493         if (local->hw.conf.beacon_int == 0)
3494                 local->hw.conf.beacon_int = 10000;
3495         bss->beacon_int = local->hw.conf.beacon_int;
3496         bss->last_update = jiffies;
3497         bss->capability = WLAN_CAPABILITY_IBSS;
3498         if (sdata->default_key) {
3499                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3500         } else
3501                 sdata->drop_unencrypted = 0;
3502         bss->supp_rates_len = sband->n_bitrates;
3503         pos = bss->supp_rates;
3504         for (i = 0; i < sband->n_bitrates; i++) {
3505                 int rate = sband->bitrates[i].bitrate;
3506                 *pos++ = (u8) (rate / 5);
3507         }
3508
3509         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3510 }
3511
3512
3513 static int ieee80211_sta_find_ibss(struct net_device *dev,
3514                                    struct ieee80211_if_sta *ifsta)
3515 {
3516         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3517         struct ieee80211_sta_bss *bss;
3518         int found = 0;
3519         u8 bssid[ETH_ALEN];
3520         int active_ibss;
3521         DECLARE_MAC_BUF(mac);
3522         DECLARE_MAC_BUF(mac2);
3523
3524         if (ifsta->ssid_len == 0)
3525                 return -EINVAL;
3526
3527         active_ibss = ieee80211_sta_active_ibss(dev);
3528 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3529         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3530                dev->name, active_ibss);
3531 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3532         spin_lock_bh(&local->sta_bss_lock);
3533         list_for_each_entry(bss, &local->sta_bss_list, list) {
3534                 if (ifsta->ssid_len != bss->ssid_len ||
3535                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3536                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3537                         continue;
3538 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3539                 printk(KERN_DEBUG "   bssid=%s found\n",
3540                        print_mac(mac, bss->bssid));
3541 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3542                 memcpy(bssid, bss->bssid, ETH_ALEN);
3543                 found = 1;
3544                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3545                         break;
3546         }
3547         spin_unlock_bh(&local->sta_bss_lock);
3548
3549 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3550         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3551                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3552 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3553         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3554             (bss = ieee80211_rx_bss_get(dev, bssid,
3555                                         local->hw.conf.channel->center_freq,
3556                                         ifsta->ssid, ifsta->ssid_len))) {
3557                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3558                        " based on configured SSID\n",
3559                        dev->name, print_mac(mac, bssid));
3560                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3561         }
3562 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3563         printk(KERN_DEBUG "   did not try to join ibss\n");
3564 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3565
3566         /* Selected IBSS not found in current scan results - try to scan */
3567         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3568             !ieee80211_sta_active_ibss(dev)) {
3569                 mod_timer(&ifsta->timer, jiffies +
3570                                       IEEE80211_IBSS_MERGE_INTERVAL);
3571         } else if (time_after(jiffies, local->last_scan_completed +
3572                               IEEE80211_SCAN_INTERVAL)) {
3573                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3574                        "join\n", dev->name);
3575                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3576                                               ifsta->ssid_len);
3577         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3578                 int interval = IEEE80211_SCAN_INTERVAL;
3579
3580                 if (time_after(jiffies, ifsta->ibss_join_req +
3581                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3582                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3583                             (!(local->oper_channel->flags &
3584                                         IEEE80211_CHAN_NO_IBSS)))
3585                                 return ieee80211_sta_create_ibss(dev, ifsta);
3586                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3587                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3588                                        " %d MHz\n", dev->name,
3589                                        local->hw.conf.channel->center_freq);
3590                         }
3591
3592                         /* No IBSS found - decrease scan interval and continue
3593                          * scanning. */
3594                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3595                 }
3596
3597                 ifsta->state = IEEE80211_IBSS_SEARCH;
3598                 mod_timer(&ifsta->timer, jiffies + interval);
3599                 return 0;
3600         }
3601
3602         return 0;
3603 }
3604
3605
3606 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3607 {
3608         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3609         struct ieee80211_if_sta *ifsta;
3610
3611         if (len > IEEE80211_MAX_SSID_LEN)
3612                 return -EINVAL;
3613
3614         ifsta = &sdata->u.sta;
3615
3616         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3617                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3618         memcpy(ifsta->ssid, ssid, len);
3619         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3620         ifsta->ssid_len = len;
3621
3622         if (len)
3623                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3624         else
3625                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3626         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3627             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3628                 ifsta->ibss_join_req = jiffies;
3629                 ifsta->state = IEEE80211_IBSS_SEARCH;
3630                 return ieee80211_sta_find_ibss(dev, ifsta);
3631         }
3632         return 0;
3633 }
3634
3635
3636 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3637 {
3638         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3639         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3640         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3641         *len = ifsta->ssid_len;
3642         return 0;
3643 }
3644
3645
3646 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3647 {
3648         struct ieee80211_sub_if_data *sdata;
3649         struct ieee80211_if_sta *ifsta;
3650         int res;
3651
3652         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3653         ifsta = &sdata->u.sta;
3654
3655         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3656                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3657                 res = ieee80211_if_config(dev);
3658                 if (res) {
3659                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3660                                "the low-level driver\n", dev->name);
3661                         return res;
3662                 }
3663         }
3664
3665         if (is_valid_ether_addr(bssid))
3666                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3667         else
3668                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3669
3670         return 0;
3671 }
3672
3673
3674 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3675                                     struct ieee80211_sub_if_data *sdata,
3676                                     int powersave)
3677 {
3678         struct sk_buff *skb;
3679         struct ieee80211_hdr *nullfunc;
3680         u16 fc;
3681
3682         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3683         if (!skb) {
3684                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3685                        "frame\n", sdata->dev->name);
3686                 return;
3687         }
3688         skb_reserve(skb, local->hw.extra_tx_headroom);
3689
3690         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3691         memset(nullfunc, 0, 24);
3692         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3693              IEEE80211_FCTL_TODS;
3694         if (powersave)
3695                 fc |= IEEE80211_FCTL_PM;
3696         nullfunc->frame_control = cpu_to_le16(fc);
3697         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3698         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3699         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3700
3701         ieee80211_sta_tx(sdata->dev, skb, 0);
3702 }
3703
3704
3705 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3706 {
3707         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3708             ieee80211_vif_is_mesh(&sdata->vif))
3709                 ieee80211_sta_timer((unsigned long)sdata);
3710 }
3711
3712 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3713 {
3714         struct ieee80211_local *local = hw_to_local(hw);
3715         struct net_device *dev = local->scan_dev;
3716         struct ieee80211_sub_if_data *sdata;
3717         union iwreq_data wrqu;
3718
3719         local->last_scan_completed = jiffies;
3720         memset(&wrqu, 0, sizeof(wrqu));
3721         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3722
3723         if (local->sta_hw_scanning) {
3724                 local->sta_hw_scanning = 0;
3725                 if (ieee80211_hw_config(local))
3726                         printk(KERN_DEBUG "%s: failed to restore operational "
3727                                "channel after scan\n", dev->name);
3728                 /* Restart STA timer for HW scan case */
3729                 rcu_read_lock();
3730                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3731                         ieee80211_restart_sta_timer(sdata);
3732                 rcu_read_unlock();
3733
3734                 goto done;
3735         }
3736
3737         local->sta_sw_scanning = 0;
3738         if (ieee80211_hw_config(local))
3739                 printk(KERN_DEBUG "%s: failed to restore operational "
3740                        "channel after scan\n", dev->name);
3741
3742
3743         netif_tx_lock_bh(local->mdev);
3744         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3745         local->ops->configure_filter(local_to_hw(local),
3746                                      FIF_BCN_PRBRESP_PROMISC,
3747                                      &local->filter_flags,
3748                                      local->mdev->mc_count,
3749                                      local->mdev->mc_list);
3750
3751         netif_tx_unlock_bh(local->mdev);
3752
3753         rcu_read_lock();
3754         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3755
3756                 /* No need to wake the master device. */
3757                 if (sdata->dev == local->mdev)
3758                         continue;
3759
3760                 /* Tell AP we're back */
3761                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3762                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3763                         ieee80211_send_nullfunc(local, sdata, 0);
3764
3765                 ieee80211_restart_sta_timer(sdata);
3766
3767                 netif_wake_queue(sdata->dev);
3768         }
3769         rcu_read_unlock();
3770
3771 done:
3772         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3773         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3774                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3775                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3776                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3777                     !ieee80211_sta_active_ibss(dev)))
3778                         ieee80211_sta_find_ibss(dev, ifsta);
3779         }
3780 }
3781 EXPORT_SYMBOL(ieee80211_scan_completed);
3782
3783 void ieee80211_sta_scan_work(struct work_struct *work)
3784 {
3785         struct ieee80211_local *local =
3786                 container_of(work, struct ieee80211_local, scan_work.work);
3787         struct net_device *dev = local->scan_dev;
3788         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3789         struct ieee80211_supported_band *sband;
3790         struct ieee80211_channel *chan;
3791         int skip;
3792         unsigned long next_delay = 0;
3793
3794         if (!local->sta_sw_scanning)
3795                 return;
3796
3797         switch (local->scan_state) {
3798         case SCAN_SET_CHANNEL:
3799                 /*
3800                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3801                  * after we successfully scanned the last channel of the last
3802                  * band (and the last band is supported by the hw)
3803                  */
3804                 if (local->scan_band < IEEE80211_NUM_BANDS)
3805                         sband = local->hw.wiphy->bands[local->scan_band];
3806                 else
3807                         sband = NULL;
3808
3809                 /*
3810                  * If we are at an unsupported band and have more bands
3811                  * left to scan, advance to the next supported one.
3812                  */
3813                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3814                         local->scan_band++;
3815                         sband = local->hw.wiphy->bands[local->scan_band];
3816                         local->scan_channel_idx = 0;
3817                 }
3818
3819                 /* if no more bands/channels left, complete scan */
3820                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3821                         ieee80211_scan_completed(local_to_hw(local));
3822                         return;
3823                 }
3824                 skip = 0;
3825                 chan = &sband->channels[local->scan_channel_idx];
3826
3827                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3828                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3829                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3830                         skip = 1;
3831
3832                 if (!skip) {
3833                         local->scan_channel = chan;
3834                         if (ieee80211_hw_config(local)) {
3835                                 printk(KERN_DEBUG "%s: failed to set freq to "
3836                                        "%d MHz for scan\n", dev->name,
3837                                        chan->center_freq);
3838                                 skip = 1;
3839                         }
3840                 }
3841
3842                 /* advance state machine to next channel/band */
3843                 local->scan_channel_idx++;
3844                 if (local->scan_channel_idx >= sband->n_channels) {
3845                         /*
3846                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3847                          * we'll catch that case above and complete the scan
3848                          * if that is the case.
3849                          */
3850                         local->scan_band++;
3851                         local->scan_channel_idx = 0;
3852                 }
3853
3854                 if (skip)
3855                         break;
3856
3857                 next_delay = IEEE80211_PROBE_DELAY +
3858                              usecs_to_jiffies(local->hw.channel_change_time);
3859                 local->scan_state = SCAN_SEND_PROBE;
3860                 break;
3861         case SCAN_SEND_PROBE:
3862                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3863                 local->scan_state = SCAN_SET_CHANNEL;
3864
3865                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3866                         break;
3867                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3868                                          local->scan_ssid_len);
3869                 next_delay = IEEE80211_CHANNEL_TIME;
3870                 break;
3871         }
3872
3873         if (local->sta_sw_scanning)
3874                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3875                                    next_delay);
3876 }
3877
3878
3879 static int ieee80211_sta_start_scan(struct net_device *dev,
3880                                     u8 *ssid, size_t ssid_len)
3881 {
3882         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3883         struct ieee80211_sub_if_data *sdata;
3884
3885         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3886                 return -EINVAL;
3887
3888         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3889          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3890          * BSSID: MACAddress
3891          * SSID
3892          * ScanType: ACTIVE, PASSIVE
3893          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3894          *    a Probe frame during active scanning
3895          * ChannelList
3896          * MinChannelTime (>= ProbeDelay), in TU
3897          * MaxChannelTime: (>= MinChannelTime), in TU
3898          */
3899
3900          /* MLME-SCAN.confirm
3901           * BSSDescriptionSet
3902           * ResultCode: SUCCESS, INVALID_PARAMETERS
3903          */
3904
3905         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3906                 if (local->scan_dev == dev)
3907                         return 0;
3908                 return -EBUSY;
3909         }
3910
3911         if (local->ops->hw_scan) {
3912                 int rc = local->ops->hw_scan(local_to_hw(local),
3913                                              ssid, ssid_len);
3914                 if (!rc) {
3915                         local->sta_hw_scanning = 1;
3916                         local->scan_dev = dev;
3917                 }
3918                 return rc;
3919         }
3920
3921         local->sta_sw_scanning = 1;
3922
3923         rcu_read_lock();
3924         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3925
3926                 /* Don't stop the master interface, otherwise we can't transmit
3927                  * probes! */
3928                 if (sdata->dev == local->mdev)
3929                         continue;
3930
3931                 netif_stop_queue(sdata->dev);
3932                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3933                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3934                         ieee80211_send_nullfunc(local, sdata, 1);
3935         }
3936         rcu_read_unlock();
3937
3938         if (ssid) {
3939                 local->scan_ssid_len = ssid_len;
3940                 memcpy(local->scan_ssid, ssid, ssid_len);
3941         } else
3942                 local->scan_ssid_len = 0;
3943         local->scan_state = SCAN_SET_CHANNEL;
3944         local->scan_channel_idx = 0;
3945         local->scan_band = IEEE80211_BAND_2GHZ;
3946         local->scan_dev = dev;
3947
3948         netif_tx_lock_bh(local->mdev);
3949         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3950         local->ops->configure_filter(local_to_hw(local),
3951                                      FIF_BCN_PRBRESP_PROMISC,
3952                                      &local->filter_flags,
3953                                      local->mdev->mc_count,
3954                                      local->mdev->mc_list);
3955         netif_tx_unlock_bh(local->mdev);
3956
3957         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3958         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3959                            IEEE80211_CHANNEL_TIME);
3960
3961         return 0;
3962 }
3963
3964
3965 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3966 {
3967         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3968         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3969         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3970
3971         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3972                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3973
3974         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3975                 if (local->scan_dev == dev)
3976                         return 0;
3977                 return -EBUSY;
3978         }
3979
3980         ifsta->scan_ssid_len = ssid_len;
3981         if (ssid_len)
3982                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3983         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3984         queue_work(local->hw.workqueue, &ifsta->work);
3985         return 0;
3986 }
3987
3988 static char *
3989 ieee80211_sta_scan_result(struct net_device *dev,
3990                           struct ieee80211_sta_bss *bss,
3991                           char *current_ev, char *end_buf)
3992 {
3993         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3994         struct iw_event iwe;
3995
3996         if (time_after(jiffies,
3997                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3998                 return current_ev;
3999
4000         memset(&iwe, 0, sizeof(iwe));
4001         iwe.cmd = SIOCGIWAP;
4002         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4003         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4004         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4005                                           IW_EV_ADDR_LEN);
4006
4007         memset(&iwe, 0, sizeof(iwe));
4008         iwe.cmd = SIOCGIWESSID;
4009         if (bss_mesh_cfg(bss)) {
4010                 iwe.u.data.length = bss_mesh_id_len(bss);
4011                 iwe.u.data.flags = 1;
4012                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4013                                                   bss_mesh_id(bss));
4014         } else {
4015                 iwe.u.data.length = bss->ssid_len;
4016                 iwe.u.data.flags = 1;
4017                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4018                                                   bss->ssid);
4019         }
4020
4021         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4022             || bss_mesh_cfg(bss)) {
4023                 memset(&iwe, 0, sizeof(iwe));
4024                 iwe.cmd = SIOCGIWMODE;
4025                 if (bss_mesh_cfg(bss))
4026                         iwe.u.mode = IW_MODE_MESH;
4027                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4028                         iwe.u.mode = IW_MODE_MASTER;
4029                 else
4030                         iwe.u.mode = IW_MODE_ADHOC;
4031                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4032                                                   IW_EV_UINT_LEN);
4033         }
4034
4035         memset(&iwe, 0, sizeof(iwe));
4036         iwe.cmd = SIOCGIWFREQ;
4037         iwe.u.freq.m = bss->freq;
4038         iwe.u.freq.e = 6;
4039         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4040                                           IW_EV_FREQ_LEN);
4041
4042         memset(&iwe, 0, sizeof(iwe));
4043         iwe.cmd = SIOCGIWFREQ;
4044         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4045         iwe.u.freq.e = 0;
4046         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4047                                           IW_EV_FREQ_LEN);
4048
4049         memset(&iwe, 0, sizeof(iwe));
4050         iwe.cmd = IWEVQUAL;
4051         iwe.u.qual.qual = bss->signal;
4052         iwe.u.qual.level = bss->rssi;
4053         iwe.u.qual.noise = bss->noise;
4054         iwe.u.qual.updated = local->wstats_flags;
4055         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4056                                           IW_EV_QUAL_LEN);
4057
4058         memset(&iwe, 0, sizeof(iwe));
4059         iwe.cmd = SIOCGIWENCODE;
4060         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4061                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4062         else
4063                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4064         iwe.u.data.length = 0;
4065         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4066
4067         if (bss && bss->wpa_ie) {
4068                 memset(&iwe, 0, sizeof(iwe));
4069                 iwe.cmd = IWEVGENIE;
4070                 iwe.u.data.length = bss->wpa_ie_len;
4071                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4072                                                   bss->wpa_ie);
4073         }
4074
4075         if (bss && bss->rsn_ie) {
4076                 memset(&iwe, 0, sizeof(iwe));
4077                 iwe.cmd = IWEVGENIE;
4078                 iwe.u.data.length = bss->rsn_ie_len;
4079                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4080                                                   bss->rsn_ie);
4081         }
4082
4083         if (bss && bss->supp_rates_len > 0) {
4084                 /* display all supported rates in readable format */
4085                 char *p = current_ev + IW_EV_LCP_LEN;
4086                 int i;
4087
4088                 memset(&iwe, 0, sizeof(iwe));
4089                 iwe.cmd = SIOCGIWRATE;
4090                 /* Those two flags are ignored... */
4091                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4092
4093                 for (i = 0; i < bss->supp_rates_len; i++) {
4094                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4095                                                         0x7f) * 500000);
4096                         p = iwe_stream_add_value(current_ev, p,
4097                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4098                 }
4099                 current_ev = p;
4100         }
4101
4102         if (bss) {
4103                 char *buf;
4104                 buf = kmalloc(30, GFP_ATOMIC);
4105                 if (buf) {
4106                         memset(&iwe, 0, sizeof(iwe));
4107                         iwe.cmd = IWEVCUSTOM;
4108                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4109                         iwe.u.data.length = strlen(buf);
4110                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4111                                                           &iwe, buf);
4112                         kfree(buf);
4113                 }
4114         }
4115
4116         if (bss_mesh_cfg(bss)) {
4117                 char *buf;
4118                 u8 *cfg = bss_mesh_cfg(bss);
4119                 buf = kmalloc(50, GFP_ATOMIC);
4120                 if (buf) {
4121                         memset(&iwe, 0, sizeof(iwe));
4122                         iwe.cmd = IWEVCUSTOM;
4123                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4124                         iwe.u.data.length = strlen(buf);
4125                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4126                                                           &iwe, buf);
4127                         sprintf(buf, "Path Selection Protocol ID: "
4128                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4129                                                         cfg[4]);
4130                         iwe.u.data.length = strlen(buf);
4131                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4132                                                           &iwe, buf);
4133                         sprintf(buf, "Path Selection Metric ID: "
4134                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4135                                                         cfg[8]);
4136                         iwe.u.data.length = strlen(buf);
4137                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4138                                                           &iwe, buf);
4139                         sprintf(buf, "Congestion Control Mode ID: "
4140                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4141                                                         cfg[11], cfg[12]);
4142                         iwe.u.data.length = strlen(buf);
4143                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4144                                                           &iwe, buf);
4145                         sprintf(buf, "Channel Precedence: "
4146                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4147                                                         cfg[15], cfg[16]);
4148                         iwe.u.data.length = strlen(buf);
4149                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4150                                                           &iwe, buf);
4151                         kfree(buf);
4152                 }
4153         }
4154
4155         return current_ev;
4156 }
4157
4158
4159 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4160 {
4161         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4162         char *current_ev = buf;
4163         char *end_buf = buf + len;
4164         struct ieee80211_sta_bss *bss;
4165
4166         spin_lock_bh(&local->sta_bss_lock);
4167         list_for_each_entry(bss, &local->sta_bss_list, list) {
4168                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4169                         spin_unlock_bh(&local->sta_bss_lock);
4170                         return -E2BIG;
4171                 }
4172                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4173                                                        end_buf);
4174         }
4175         spin_unlock_bh(&local->sta_bss_lock);
4176         return current_ev - buf;
4177 }
4178
4179
4180 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4181 {
4182         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4183         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4184         kfree(ifsta->extra_ie);
4185         if (len == 0) {
4186                 ifsta->extra_ie = NULL;
4187                 ifsta->extra_ie_len = 0;
4188                 return 0;
4189         }
4190         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4191         if (!ifsta->extra_ie) {
4192                 ifsta->extra_ie_len = 0;
4193                 return -ENOMEM;
4194         }
4195         memcpy(ifsta->extra_ie, ie, len);
4196         ifsta->extra_ie_len = len;
4197         return 0;
4198 }
4199
4200
4201 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4202                                          struct sk_buff *skb, u8 *bssid,
4203                                          u8 *addr)
4204 {
4205         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4206         struct sta_info *sta;
4207         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4208         DECLARE_MAC_BUF(mac);
4209
4210         /* TODO: Could consider removing the least recently used entry and
4211          * allow new one to be added. */
4212         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4213                 if (net_ratelimit()) {
4214                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4215                                "entry %s\n", dev->name, print_mac(mac, addr));
4216                 }
4217                 return NULL;
4218         }
4219
4220         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4221                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4222
4223         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4224         if (!sta)
4225                 return NULL;
4226
4227         sta->flags |= WLAN_STA_AUTHORIZED;
4228
4229         sta->supp_rates[local->hw.conf.channel->band] =
4230                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4231
4232         rate_control_rate_init(sta, local);
4233
4234         if (sta_info_insert(sta))
4235                 return NULL;
4236
4237         return sta;
4238 }
4239
4240
4241 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4242 {
4243         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4244         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4245
4246         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4247                dev->name, reason);
4248
4249         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4250             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4251                 return -EINVAL;
4252
4253         ieee80211_send_deauth(dev, ifsta, reason);
4254         ieee80211_set_disassoc(dev, ifsta, 1);
4255         return 0;
4256 }
4257
4258
4259 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4260 {
4261         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4262         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4263
4264         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4265                dev->name, reason);
4266
4267         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4268                 return -EINVAL;
4269
4270         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4271                 return -1;
4272
4273         ieee80211_send_disassoc(dev, ifsta, reason);
4274         ieee80211_set_disassoc(dev, ifsta, 0);
4275         return 0;
4276 }
4277
4278 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4279                           enum ieee80211_notification_types  notif_type)
4280 {
4281         struct ieee80211_local *local = hw_to_local(hw);
4282         struct ieee80211_sub_if_data *sdata;
4283
4284         switch (notif_type) {
4285         case IEEE80211_NOTIFY_RE_ASSOC:
4286                 rcu_read_lock();
4287                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4288
4289                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4290                                 ieee80211_sta_req_auth(sdata->dev,
4291                                                        &sdata->u.sta);
4292                         }
4293
4294                 }
4295                 rcu_read_unlock();
4296                 break;
4297         }
4298 }
4299 EXPORT_SYMBOL(ieee80211_notify_mac);