net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "rate.h"
  34 #include "led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 /* mgmt header + 1 byte action code */
  63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  64
  65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  70
  71 /* next values represent the buffer size for A-MPDU frame.
  72  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  73 #define IEEE80211_MIN_AMPDU_BUF 0x8
  74 #define IEEE80211_MAX_AMPDU_BUF 0x40
  75
  76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  77                                      u8 *ssid, size_t ssid_len);
  78 static struct ieee80211_sta_bss *
  79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  80                      u8 *ssid, u8 ssid_len);
  81 static void ieee80211_rx_bss_put(struct net_device *dev,
  82                                  struct ieee80211_sta_bss *bss);
  83 static int ieee80211_sta_find_ibss(struct net_device *dev,
  84                                    struct ieee80211_if_sta *ifsta);
  85 static int ieee80211_sta_wep_configured(struct net_device *dev);
  86 static int ieee80211_sta_start_scan(struct net_device *dev,
  87                                     u8 *ssid, size_t ssid_len);
  88 static int ieee80211_sta_config_auth(struct net_device *dev,
  89                                      struct ieee80211_if_sta *ifsta);
  90
  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 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 669                                       struct ieee80211_supported_band *sband,
 670                                       u64 *rates)
 671 {
 672         int i, j, count;
 673         *rates = 0;
 674         count = 0;
 675         for (i = 0; i < bss->supp_rates_len; i++) {
 676                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 677
 678                 for (j = 0; j < sband->n_bitrates; j++)
 679                         if (sband->bitrates[j].bitrate == rate) {
 680                                 *rates |= BIT(j);
 681                                 count++;
 682                                 break;
 683                         }
 684         }
 685
 686         return count;
 687 }
 688
 689 static void ieee80211_send_assoc(struct net_device *dev,
 690                                  struct ieee80211_if_sta *ifsta)
 691 {
 692         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 693         struct sk_buff *skb;
 694         struct ieee80211_mgmt *mgmt;
 695         u8 *pos, *ies;
 696         int i, len, count, rates_len, supp_rates_len;
 697         u16 capab;
 698         struct ieee80211_sta_bss *bss;
 699         int wmm = 0;
 700         struct ieee80211_supported_band *sband;
 701         u64 rates = 0;
 702
 703         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 704                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 705                             ifsta->ssid_len);
 706         if (!skb) {
 707                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 708                        "frame\n", dev->name);
 709                 return;
 710         }
 711         skb_reserve(skb, local->hw.extra_tx_headroom);
 712
 713         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 714
 715         capab = ifsta->capab;
 716
 717         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 718                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 719                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 720                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 721                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 722         }
 723
 724         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 725                                    local->hw.conf.channel->center_freq,
 726                                    ifsta->ssid, ifsta->ssid_len);
 727         if (bss) {
 728                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 729                         capab |= WLAN_CAPABILITY_PRIVACY;
 730                 if (bss->wmm_ie) {
 731                         wmm = 1;
 732                 }
 733
 734                 /* get all rates supported by the device and the AP as
 735                  * some APs don't like getting a superset of their rates
 736                  * in the association request (e.g. D-Link DAP 1353 in
 737                  * b-only mode) */
 738                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 739
 740                 ieee80211_rx_bss_put(dev, bss);
 741         } else {
 742                 rates = ~0;
 743                 rates_len = sband->n_bitrates;
 744         }
 745
 746         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 747         memset(mgmt, 0, 24);
 748         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 749         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 750         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 751
 752         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 753                 skb_put(skb, 10);
 754                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 755                                                    IEEE80211_STYPE_REASSOC_REQ);
 756                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 757                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 758                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 759                        ETH_ALEN);
 760         } else {
 761                 skb_put(skb, 4);
 762                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 763                                                    IEEE80211_STYPE_ASSOC_REQ);
 764                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 765                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 766         }
 767
 768         /* SSID */
 769         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 770         *pos++ = WLAN_EID_SSID;
 771         *pos++ = ifsta->ssid_len;
 772         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 773
 774         /* add all rates which were marked to be used above */
 775         supp_rates_len = rates_len;
 776         if (supp_rates_len > 8)
 777                 supp_rates_len = 8;
 778
 779         len = sband->n_bitrates;
 780         pos = skb_put(skb, supp_rates_len + 2);
 781         *pos++ = WLAN_EID_SUPP_RATES;
 782         *pos++ = supp_rates_len;
 783
 784         count = 0;
 785         for (i = 0; i < sband->n_bitrates; i++) {
 786                 if (BIT(i) & rates) {
 787                         int rate = sband->bitrates[i].bitrate;
 788                         *pos++ = (u8) (rate / 5);
 789                         if (++count == 8)
 790                                 break;
 791                 }
 792         }
 793
 794         if (count == 8) {
 795                 pos = skb_put(skb, rates_len - count + 2);
 796                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 797                 *pos++ = rates_len - count;
 798
 799                 for (i++; i < sband->n_bitrates; i++) {
 800                         if (BIT(i) & rates) {
 801                                 int rate = sband->bitrates[i].bitrate;
 802                                 *pos++ = (u8) (rate / 5);
 803                         }
 804                 }
 805         }
 806
 807         if (ifsta->extra_ie) {
 808                 pos = skb_put(skb, ifsta->extra_ie_len);
 809                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 810         }
 811
 812         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 813                 pos = skb_put(skb, 9);
 814                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 815                 *pos++ = 7; /* len */
 816                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 817                 *pos++ = 0x50;
 818                 *pos++ = 0xf2;
 819                 *pos++ = 2; /* WME */
 820                 *pos++ = 0; /* WME info */
 821                 *pos++ = 1; /* WME ver */
 822                 *pos++ = 0;
 823         }
 824         /* wmm support is a must to HT */
 825         if (wmm && sband->ht_info.ht_supported) {
 826                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 827                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 828                 *pos++ = WLAN_EID_HT_CAPABILITY;
 829                 *pos++ = sizeof(struct ieee80211_ht_cap);
 830                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 831                 memcpy(pos, &tmp, sizeof(u16));
 832                 pos += sizeof(u16);
 833                 /* TODO: needs a define here for << 2 */
 834                 *pos++ = sband->ht_info.ampdu_factor |
 835                          (sband->ht_info.ampdu_density << 2);
 836                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 837         }
 838
 839         kfree(ifsta->assocreq_ies);
 840         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 841         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 842         if (ifsta->assocreq_ies)
 843                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 844
 845         ieee80211_sta_tx(dev, skb, 0);
 846 }
 847
 848
 849 static void ieee80211_send_deauth(struct net_device *dev,
 850                                   struct ieee80211_if_sta *ifsta, u16 reason)
 851 {
 852         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 853         struct sk_buff *skb;
 854         struct ieee80211_mgmt *mgmt;
 855
 856         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 857         if (!skb) {
 858                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 859                        "frame\n", dev->name);
 860                 return;
 861         }
 862         skb_reserve(skb, local->hw.extra_tx_headroom);
 863
 864         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 865         memset(mgmt, 0, 24);
 866         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 867         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 868         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 869         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 870                                            IEEE80211_STYPE_DEAUTH);
 871         skb_put(skb, 2);
 872         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 873
 874         ieee80211_sta_tx(dev, skb, 0);
 875 }
 876
 877
 878 static void ieee80211_send_disassoc(struct net_device *dev,
 879                                     struct ieee80211_if_sta *ifsta, u16 reason)
 880 {
 881         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 882         struct sk_buff *skb;
 883         struct ieee80211_mgmt *mgmt;
 884
 885         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 886         if (!skb) {
 887                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 888                        "frame\n", dev->name);
 889                 return;
 890         }
 891         skb_reserve(skb, local->hw.extra_tx_headroom);
 892
 893         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 894         memset(mgmt, 0, 24);
 895         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 896         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 897         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 898         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 899                                            IEEE80211_STYPE_DISASSOC);
 900         skb_put(skb, 2);
 901         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 902
 903         ieee80211_sta_tx(dev, skb, 0);
 904 }
 905
 906
 907 static int ieee80211_privacy_mismatch(struct net_device *dev,
 908                                       struct ieee80211_if_sta *ifsta)
 909 {
 910         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 911         struct ieee80211_sta_bss *bss;
 912         int bss_privacy;
 913         int wep_privacy;
 914         int privacy_invoked;
 915
 916         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 917                 return 0;
 918
 919         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 920                                    local->hw.conf.channel->center_freq,
 921                                    ifsta->ssid, ifsta->ssid_len);
 922         if (!bss)
 923                 return 0;
 924
 925         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 926         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 927         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 928
 929         ieee80211_rx_bss_put(dev, bss);
 930
 931         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 932                 return 0;
 933
 934         return 1;
 935 }
 936
 937
 938 static void ieee80211_associate(struct net_device *dev,
 939                                 struct ieee80211_if_sta *ifsta)
 940 {
 941         DECLARE_MAC_BUF(mac);
 942
 943         ifsta->assoc_tries++;
 944         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 945                 printk(KERN_DEBUG "%s: association with AP %s"
 946                        " timed out\n",
 947                        dev->name, print_mac(mac, ifsta->bssid));
 948                 ifsta->state = IEEE80211_DISABLED;
 949                 return;
 950         }
 951
 952         ifsta->state = IEEE80211_ASSOCIATE;
 953         printk(KERN_DEBUG "%s: associate with AP %s\n",
 954                dev->name, print_mac(mac, ifsta->bssid));
 955         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 956                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 957                        "mixed-cell disabled - abort association\n", dev->name);
 958                 ifsta->state = IEEE80211_DISABLED;
 959                 return;
 960         }
 961
 962         ieee80211_send_assoc(dev, ifsta);
 963
 964         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 965 }
 966
 967
 968 static void ieee80211_associated(struct net_device *dev,
 969                                  struct ieee80211_if_sta *ifsta)
 970 {
 971         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 972         struct sta_info *sta;
 973         int disassoc;
 974         DECLARE_MAC_BUF(mac);
 975
 976         /* TODO: start monitoring current AP signal quality and number of
 977          * missed beacons. Scan other channels every now and then and search
 978          * for better APs. */
 979         /* TODO: remove expired BSSes */
 980
 981         ifsta->state = IEEE80211_ASSOCIATED;
 982
 983         rcu_read_lock();
 984
 985         sta = sta_info_get(local, ifsta->bssid);
 986         if (!sta) {
 987                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 988                        dev->name, print_mac(mac, ifsta->bssid));
 989                 disassoc = 1;
 990         } else {
 991                 disassoc = 0;
 992                 if (time_after(jiffies,
 993                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 994                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 995                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 996                                        "current AP %s - assume out of "
 997                                        "range\n",
 998                                        dev->name, print_mac(mac, ifsta->bssid));
 999                                 disassoc = 1;
1000                                 sta_info_unlink(&sta);
1001                         } else
1002                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1003                                                          local->scan_ssid,
1004                                                          local->scan_ssid_len);
1005                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1006                 } else {
1007                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1008                         if (time_after(jiffies, ifsta->last_probe +
1009                                        IEEE80211_PROBE_INTERVAL)) {
1010                                 ifsta->last_probe = jiffies;
1011                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1012                                                          ifsta->ssid,
1013                                                          ifsta->ssid_len);
1014                         }
1015                 }
1016         }
1017
1018         rcu_read_unlock();
1019
1020         if (disassoc && sta)
1021                 sta_info_destroy(sta);
1022
1023         if (disassoc) {
1024                 ifsta->state = IEEE80211_DISABLED;
1025                 ieee80211_set_associated(dev, ifsta, 0);
1026         } else {
1027                 mod_timer(&ifsta->timer, jiffies +
1028                                       IEEE80211_MONITORING_INTERVAL);
1029         }
1030 }
1031
1032
1033 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1034                                      u8 *ssid, size_t ssid_len)
1035 {
1036         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1037         struct ieee80211_supported_band *sband;
1038         struct sk_buff *skb;
1039         struct ieee80211_mgmt *mgmt;
1040         u8 *pos, *supp_rates, *esupp_rates = NULL;
1041         int i;
1042
1043         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1044         if (!skb) {
1045                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1046                        "request\n", dev->name);
1047                 return;
1048         }
1049         skb_reserve(skb, local->hw.extra_tx_headroom);
1050
1051         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1052         memset(mgmt, 0, 24);
1053         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1054                                            IEEE80211_STYPE_PROBE_REQ);
1055         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1056         if (dst) {
1057                 memcpy(mgmt->da, dst, ETH_ALEN);
1058                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1059         } else {
1060                 memset(mgmt->da, 0xff, ETH_ALEN);
1061                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1062         }
1063         pos = skb_put(skb, 2 + ssid_len);
1064         *pos++ = WLAN_EID_SSID;
1065         *pos++ = ssid_len;
1066         memcpy(pos, ssid, ssid_len);
1067
1068         supp_rates = skb_put(skb, 2);
1069         supp_rates[0] = WLAN_EID_SUPP_RATES;
1070         supp_rates[1] = 0;
1071         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1072
1073         for (i = 0; i < sband->n_bitrates; i++) {
1074                 struct ieee80211_rate *rate = &sband->bitrates[i];
1075                 if (esupp_rates) {
1076                         pos = skb_put(skb, 1);
1077                         esupp_rates[1]++;
1078                 } else if (supp_rates[1] == 8) {
1079                         esupp_rates = skb_put(skb, 3);
1080                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1081                         esupp_rates[1] = 1;
1082                         pos = &esupp_rates[2];
1083                 } else {
1084                         pos = skb_put(skb, 1);
1085                         supp_rates[1]++;
1086                 }
1087                 *pos = rate->bitrate / 5;
1088         }
1089
1090         ieee80211_sta_tx(dev, skb, 0);
1091 }
1092
1093
1094 static int ieee80211_sta_wep_configured(struct net_device *dev)
1095 {
1096         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1097         if (!sdata || !sdata->default_key ||
1098             sdata->default_key->conf.alg != ALG_WEP)
1099                 return 0;
1100         return 1;
1101 }
1102
1103
1104 static void ieee80211_auth_completed(struct net_device *dev,
1105                                      struct ieee80211_if_sta *ifsta)
1106 {
1107         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1108         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1109         ieee80211_associate(dev, ifsta);
1110 }
1111
1112
1113 static void ieee80211_auth_challenge(struct net_device *dev,
1114                                      struct ieee80211_if_sta *ifsta,
1115                                      struct ieee80211_mgmt *mgmt,
1116                                      size_t len)
1117 {
1118         u8 *pos;
1119         struct ieee802_11_elems elems;
1120
1121         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1122         pos = mgmt->u.auth.variable;
1123         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1124         if (!elems.challenge) {
1125                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1126                        "frame\n", dev->name);
1127                 return;
1128         }
1129         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1130                             elems.challenge_len + 2, 1);
1131 }
1132
1133 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1134                                         u8 dialog_token, u16 status, u16 policy,
1135                                         u16 buf_size, u16 timeout)
1136 {
1137         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1138         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1139         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1140         struct sk_buff *skb;
1141         struct ieee80211_mgmt *mgmt;
1142         u16 capab;
1143
1144         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1145                                         sizeof(mgmt->u.action.u.addba_resp));
1146         if (!skb) {
1147                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1148                        "for addba resp frame\n", dev->name);
1149                 return;
1150         }
1151
1152         skb_reserve(skb, local->hw.extra_tx_headroom);
1153         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1154         memset(mgmt, 0, 24);
1155         memcpy(mgmt->da, da, ETH_ALEN);
1156         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1157         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1158                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1159         else
1160                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1161         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1162                                            IEEE80211_STYPE_ACTION);
1163
1164         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1165         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1166         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1167         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1168
1169         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1170         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1171         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1172
1173         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1174         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1175         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1176
1177         ieee80211_sta_tx(dev, skb, 0);
1178
1179         return;
1180 }
1181
1182 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1183                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1184                                 u16 agg_size, u16 timeout)
1185 {
1186         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1187         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1188         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1189         struct sk_buff *skb;
1190         struct ieee80211_mgmt *mgmt;
1191         u16 capab;
1192
1193         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1194                                 sizeof(mgmt->u.action.u.addba_req));
1195
1196
1197         if (!skb) {
1198                 printk(KERN_ERR "%s: failed to allocate buffer "
1199                                 "for addba request frame\n", dev->name);
1200                 return;
1201         }
1202         skb_reserve(skb, local->hw.extra_tx_headroom);
1203         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1204         memset(mgmt, 0, 24);
1205         memcpy(mgmt->da, da, ETH_ALEN);
1206         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1207         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1208                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1209         else
1210                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1211
1212         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1213                                         IEEE80211_STYPE_ACTION);
1214
1215         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1216
1217         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1218         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1219
1220         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1221         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1222         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1223         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1224
1225         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1226
1227         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1228         mgmt->u.action.u.addba_req.start_seq_num =
1229                                         cpu_to_le16(start_seq_num << 4);
1230
1231         ieee80211_sta_tx(dev, skb, 0);
1232 }
1233
1234 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1235                                                 struct ieee80211_mgmt *mgmt,
1236                                                 size_t len)
1237 {
1238         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1239         struct ieee80211_hw *hw = &local->hw;
1240         struct ieee80211_conf *conf = &hw->conf;
1241         struct sta_info *sta;
1242         struct tid_ampdu_rx *tid_agg_rx;
1243         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1244         u8 dialog_token;
1245         int ret = -EOPNOTSUPP;
1246         DECLARE_MAC_BUF(mac);
1247
1248         rcu_read_lock();
1249
1250         sta = sta_info_get(local, mgmt->sa);
1251         if (!sta) {
1252                 rcu_read_unlock();
1253                 return;
1254         }
1255
1256         /* extract session parameters from addba request frame */
1257         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1258         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1259         start_seq_num =
1260                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1261
1262         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1263         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1264         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1265         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1266
1267         status = WLAN_STATUS_REQUEST_DECLINED;
1268
1269         /* sanity check for incoming parameters:
1270          * check if configuration can support the BA policy
1271          * and if buffer size does not exceeds max value */
1272         if (((ba_policy != 1)
1273                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1274                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1275                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1276 #ifdef CONFIG_MAC80211_HT_DEBUG
1277                 if (net_ratelimit())
1278                         printk(KERN_DEBUG "AddBA Req with bad params from "
1279                                 "%s on tid %u. policy %d, buffer size %d\n",
1280                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1281                                 buf_size);
1282 #endif /* CONFIG_MAC80211_HT_DEBUG */
1283                 goto end_no_lock;
1284         }
1285         /* determine default buffer size */
1286         if (buf_size == 0) {
1287                 struct ieee80211_supported_band *sband;
1288
1289                 sband = local->hw.wiphy->bands[conf->channel->band];
1290                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1291                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1292         }
1293
1294
1295         /* examine state machine */
1296         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1297
1298         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1299 #ifdef CONFIG_MAC80211_HT_DEBUG
1300                 if (net_ratelimit())
1301                         printk(KERN_DEBUG "unexpected AddBA Req from "
1302                                 "%s on tid %u\n",
1303                                 print_mac(mac, mgmt->sa), tid);
1304 #endif /* CONFIG_MAC80211_HT_DEBUG */
1305                 goto end;
1306         }
1307
1308         /* prepare A-MPDU MLME for Rx aggregation */
1309         sta->ampdu_mlme.tid_rx[tid] =
1310                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1311         if (!sta->ampdu_mlme.tid_rx[tid]) {
1312                 if (net_ratelimit())
1313                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1314                                         tid);
1315                 goto end;
1316         }
1317         /* rx timer */
1318         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1319                                 sta_rx_agg_session_timer_expired;
1320         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1321                                 (unsigned long)&sta->timer_to_tid[tid];
1322         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1323
1324         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1325
1326         /* prepare reordering buffer */
1327         tid_agg_rx->reorder_buf =
1328                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1329         if (!tid_agg_rx->reorder_buf) {
1330                 if (net_ratelimit())
1331                         printk(KERN_ERR "can not allocate reordering buffer "
1332                                "to tid %d\n", tid);
1333                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1334                 goto end;
1335         }
1336         memset(tid_agg_rx->reorder_buf, 0,
1337                 buf_size * sizeof(struct sk_buff *));
1338
1339         if (local->ops->ampdu_action)
1340                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1341                                                sta->addr, tid, &start_seq_num);
1342 #ifdef CONFIG_MAC80211_HT_DEBUG
1343         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1344 #endif /* CONFIG_MAC80211_HT_DEBUG */
1345
1346         if (ret) {
1347                 kfree(tid_agg_rx->reorder_buf);
1348                 kfree(tid_agg_rx);
1349                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1350                 goto end;
1351         }
1352
1353         /* change state and send addba resp */
1354         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1355         tid_agg_rx->dialog_token = dialog_token;
1356         tid_agg_rx->ssn = start_seq_num;
1357         tid_agg_rx->head_seq_num = start_seq_num;
1358         tid_agg_rx->buf_size = buf_size;
1359         tid_agg_rx->timeout = timeout;
1360         tid_agg_rx->stored_mpdu_num = 0;
1361         status = WLAN_STATUS_SUCCESS;
1362 end:
1363         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1364
1365 end_no_lock:
1366         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1367                                   dialog_token, status, 1, buf_size, timeout);
1368         rcu_read_unlock();
1369 }
1370
1371 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1372                                              struct ieee80211_mgmt *mgmt,
1373                                              size_t len)
1374 {
1375         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1376         struct ieee80211_hw *hw = &local->hw;
1377         struct sta_info *sta;
1378         u16 capab;
1379         u16 tid;
1380         u8 *state;
1381
1382         rcu_read_lock();
1383
1384         sta = sta_info_get(local, mgmt->sa);
1385         if (!sta) {
1386                 rcu_read_unlock();
1387                 return;
1388         }
1389
1390         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1391         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1392
1393         state = &sta->ampdu_mlme.tid_state_tx[tid];
1394
1395         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1396
1397         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1398                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1399                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1400                         "%d\n", *state);
1401                 goto addba_resp_exit;
1402         }
1403
1404         if (mgmt->u.action.u.addba_resp.dialog_token !=
1405                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1406                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1407 #ifdef CONFIG_MAC80211_HT_DEBUG
1408                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1409 #endif /* CONFIG_MAC80211_HT_DEBUG */
1410                 goto addba_resp_exit;
1411         }
1412
1413         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1414 #ifdef CONFIG_MAC80211_HT_DEBUG
1415         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1416 #endif /* CONFIG_MAC80211_HT_DEBUG */
1417         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1418                         == WLAN_STATUS_SUCCESS) {
1419                 if (*state & HT_ADDBA_RECEIVED_MSK)
1420                         printk(KERN_DEBUG "double addBA response\n");
1421
1422                 *state |= HT_ADDBA_RECEIVED_MSK;
1423                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1424
1425                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1426                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1427                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1428                 }
1429
1430                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1431                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1432         } else {
1433                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1434
1435                 sta->ampdu_mlme.addba_req_num[tid]++;
1436                 /* this will allow the state check in stop_BA_session */
1437                 *state = HT_AGG_STATE_OPERATIONAL;
1438                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1439                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1440                                              WLAN_BACK_INITIATOR);
1441         }
1442
1443 addba_resp_exit:
1444         rcu_read_unlock();
1445 }
1446
1447 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1448                           u16 initiator, u16 reason_code)
1449 {
1450         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1451         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1452         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1453         struct sk_buff *skb;
1454         struct ieee80211_mgmt *mgmt;
1455         u16 params;
1456
1457         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1458                                         sizeof(mgmt->u.action.u.delba));
1459
1460         if (!skb) {
1461                 printk(KERN_ERR "%s: failed to allocate buffer "
1462                                         "for delba frame\n", dev->name);
1463                 return;
1464         }
1465
1466         skb_reserve(skb, local->hw.extra_tx_headroom);
1467         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1468         memset(mgmt, 0, 24);
1469         memcpy(mgmt->da, da, ETH_ALEN);
1470         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1471         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1472                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1473         else
1474                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1475         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1476                                         IEEE80211_STYPE_ACTION);
1477
1478         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1479
1480         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1481         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1482         params = (u16)(initiator << 11);        /* bit 11 initiator */
1483         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1484
1485         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1486         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1487
1488         ieee80211_sta_tx(dev, skb, 0);
1489 }
1490
1491 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1492                                         u16 initiator, u16 reason)
1493 {
1494         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1495         struct ieee80211_hw *hw = &local->hw;
1496         struct sta_info *sta;
1497         int ret, i;
1498         DECLARE_MAC_BUF(mac);
1499
1500         rcu_read_lock();
1501
1502         sta = sta_info_get(local, ra);
1503         if (!sta) {
1504                 rcu_read_unlock();
1505                 return;
1506         }
1507
1508         /* check if TID is in operational state */
1509         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1510         if (sta->ampdu_mlme.tid_state_rx[tid]
1511                                 != HT_AGG_STATE_OPERATIONAL) {
1512                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1513                 rcu_read_unlock();
1514                 return;
1515         }
1516         sta->ampdu_mlme.tid_state_rx[tid] =
1517                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1518                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1519         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1520
1521         /* stop HW Rx aggregation. ampdu_action existence
1522          * already verified in session init so we add the BUG_ON */
1523         BUG_ON(!local->ops->ampdu_action);
1524
1525 #ifdef CONFIG_MAC80211_HT_DEBUG
1526         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1527                                 print_mac(mac, ra), tid);
1528 #endif /* CONFIG_MAC80211_HT_DEBUG */
1529
1530         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1531                                         ra, tid, NULL);
1532         if (ret)
1533                 printk(KERN_DEBUG "HW problem - can not stop rx "
1534                                 "aggergation for tid %d\n", tid);
1535
1536         /* shutdown timer has not expired */
1537         if (initiator != WLAN_BACK_TIMER)
1538                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1539
1540         /* check if this is a self generated aggregation halt */
1541         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1542                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1543
1544         /* free the reordering buffer */
1545         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1546                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1547                         /* release the reordered frames */
1548                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1549                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1550                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1551                 }
1552         }
1553         /* free resources */
1554         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1555         kfree(sta->ampdu_mlme.tid_rx[tid]);
1556         sta->ampdu_mlme.tid_rx[tid] = NULL;
1557         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1558
1559         rcu_read_unlock();
1560 }
1561
1562
1563 static void ieee80211_sta_process_delba(struct net_device *dev,
1564                         struct ieee80211_mgmt *mgmt, size_t len)
1565 {
1566         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1567         struct sta_info *sta;
1568         u16 tid, params;
1569         u16 initiator;
1570         DECLARE_MAC_BUF(mac);
1571
1572         rcu_read_lock();
1573
1574         sta = sta_info_get(local, mgmt->sa);
1575         if (!sta) {
1576                 rcu_read_unlock();
1577                 return;
1578         }
1579
1580         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1581         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1582         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1583
1584 #ifdef CONFIG_MAC80211_HT_DEBUG
1585         if (net_ratelimit())
1586                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1587                         print_mac(mac, mgmt->sa),
1588                         initiator ? "initiator" : "recipient", tid,
1589                         mgmt->u.action.u.delba.reason_code);
1590 #endif /* CONFIG_MAC80211_HT_DEBUG */
1591
1592         if (initiator == WLAN_BACK_INITIATOR)
1593                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1594                                                  WLAN_BACK_INITIATOR, 0);
1595         else { /* WLAN_BACK_RECIPIENT */
1596                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1597                 sta->ampdu_mlme.tid_state_tx[tid] =
1598                                 HT_AGG_STATE_OPERATIONAL;
1599                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1600                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1601                                              WLAN_BACK_RECIPIENT);
1602         }
1603         rcu_read_unlock();
1604 }
1605
1606 /*
1607  * After sending add Block Ack request we activated a timer until
1608  * add Block Ack response will arrive from the recipient.
1609  * If this timer expires sta_addba_resp_timer_expired will be executed.
1610  */
1611 void sta_addba_resp_timer_expired(unsigned long data)
1612 {
1613         /* not an elegant detour, but there is no choice as the timer passes
1614          * only one argument, and both sta_info and TID are needed, so init
1615          * flow in sta_info_create gives the TID as data, while the timer_to_id
1616          * array gives the sta through container_of */
1617         u16 tid = *(u8 *)data;
1618         struct sta_info *temp_sta = container_of((void *)data,
1619                 struct sta_info, timer_to_tid[tid]);
1620
1621         struct ieee80211_local *local = temp_sta->local;
1622         struct ieee80211_hw *hw = &local->hw;
1623         struct sta_info *sta;
1624         u8 *state;
1625
1626         rcu_read_lock();
1627
1628         sta = sta_info_get(local, temp_sta->addr);
1629         if (!sta) {
1630                 rcu_read_unlock();
1631                 return;
1632         }
1633
1634         state = &sta->ampdu_mlme.tid_state_tx[tid];
1635         /* check if the TID waits for addBA response */
1636         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1637         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1638                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1639                 *state = HT_AGG_STATE_IDLE;
1640                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1641                                 "expecting addBA response there", tid);
1642                 goto timer_expired_exit;
1643         }
1644
1645         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1646
1647         /* go through the state check in stop_BA_session */
1648         *state = HT_AGG_STATE_OPERATIONAL;
1649         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1650         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1651                                      WLAN_BACK_INITIATOR);
1652
1653 timer_expired_exit:
1654         rcu_read_unlock();
1655 }
1656
1657 /*
1658  * After accepting the AddBA Request we activated a timer,
1659  * resetting it after each frame that arrives from the originator.
1660  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1661  */
1662 void sta_rx_agg_session_timer_expired(unsigned long data)
1663 {
1664         /* not an elegant detour, but there is no choice as the timer passes
1665          * only one argument, and various sta_info are needed here, so init
1666          * flow in sta_info_create gives the TID as data, while the timer_to_id
1667          * array gives the sta through container_of */
1668         u8 *ptid = (u8 *)data;
1669         u8 *timer_to_id = ptid - *ptid;
1670         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1671                                          timer_to_tid[0]);
1672
1673         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1674         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1675                                          (u16)*ptid, WLAN_BACK_TIMER,
1676                                          WLAN_REASON_QSTA_TIMEOUT);
1677 }
1678
1679 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1680 {
1681         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1682         int i;
1683
1684         for (i = 0; i <  STA_TID_NUM; i++) {
1685                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1686                                              WLAN_BACK_INITIATOR);
1687                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1688                                                  WLAN_BACK_RECIPIENT,
1689                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1690         }
1691 }
1692
1693 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1694                                    struct ieee80211_if_sta *ifsta,
1695                                    struct ieee80211_mgmt *mgmt,
1696                                    size_t len)
1697 {
1698         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1699         u16 auth_alg, auth_transaction, status_code;
1700         DECLARE_MAC_BUF(mac);
1701
1702         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1703             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1704                 printk(KERN_DEBUG "%s: authentication frame received from "
1705                        "%s, but not in authenticate state - ignored\n",
1706                        dev->name, print_mac(mac, mgmt->sa));
1707                 return;
1708         }
1709
1710         if (len < 24 + 6) {
1711                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1712                        "received from %s - ignored\n",
1713                        dev->name, len, print_mac(mac, mgmt->sa));
1714                 return;
1715         }
1716
1717         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1718             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1719                 printk(KERN_DEBUG "%s: authentication frame received from "
1720                        "unknown AP (SA=%s BSSID=%s) - "
1721                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1722                        print_mac(mac, mgmt->bssid));
1723                 return;
1724         }
1725
1726         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1727             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1728                 printk(KERN_DEBUG "%s: authentication frame received from "
1729                        "unknown BSSID (SA=%s BSSID=%s) - "
1730                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1731                        print_mac(mac, mgmt->bssid));
1732                 return;
1733         }
1734
1735         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1736         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1737         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1738
1739         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1740                "transaction=%d status=%d)\n",
1741                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1742                auth_transaction, status_code);
1743
1744         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1745                 /* IEEE 802.11 standard does not require authentication in IBSS
1746                  * networks and most implementations do not seem to use it.
1747                  * However, try to reply to authentication attempts if someone
1748                  * has actually implemented this.
1749                  * TODO: Could implement shared key authentication. */
1750                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1751                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1752                                "frame (alg=%d transaction=%d)\n",
1753                                dev->name, auth_alg, auth_transaction);
1754                         return;
1755                 }
1756                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1757         }
1758
1759         if (auth_alg != ifsta->auth_alg ||
1760             auth_transaction != ifsta->auth_transaction) {
1761                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1762                        "(alg=%d transaction=%d)\n",
1763                        dev->name, auth_alg, auth_transaction);
1764                 return;
1765         }
1766
1767         if (status_code != WLAN_STATUS_SUCCESS) {
1768                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1769                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1770                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1771                         u8 algs[3];
1772                         const int num_algs = ARRAY_SIZE(algs);
1773                         int i, pos;
1774                         algs[0] = algs[1] = algs[2] = 0xff;
1775                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1776                                 algs[0] = WLAN_AUTH_OPEN;
1777                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1778                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1779                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1780                                 algs[2] = WLAN_AUTH_LEAP;
1781                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1782                                 pos = 0;
1783                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1784                                 pos = 1;
1785                         else
1786                                 pos = 2;
1787                         for (i = 0; i < num_algs; i++) {
1788                                 pos++;
1789                                 if (pos >= num_algs)
1790                                         pos = 0;
1791                                 if (algs[pos] == ifsta->auth_alg ||
1792                                     algs[pos] == 0xff)
1793                                         continue;
1794                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1795                                     !ieee80211_sta_wep_configured(dev))
1796                                         continue;
1797                                 ifsta->auth_alg = algs[pos];
1798                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1799                                        "next try\n",
1800                                        dev->name, ifsta->auth_alg);
1801                                 break;
1802                         }
1803                 }
1804                 return;
1805         }
1806
1807         switch (ifsta->auth_alg) {
1808         case WLAN_AUTH_OPEN:
1809         case WLAN_AUTH_LEAP:
1810                 ieee80211_auth_completed(dev, ifsta);
1811                 break;
1812         case WLAN_AUTH_SHARED_KEY:
1813                 if (ifsta->auth_transaction == 4)
1814                         ieee80211_auth_completed(dev, ifsta);
1815                 else
1816                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1817                 break;
1818         }
1819 }
1820
1821
1822 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1823                                      struct ieee80211_if_sta *ifsta,
1824                                      struct ieee80211_mgmt *mgmt,
1825                                      size_t len)
1826 {
1827         u16 reason_code;
1828         DECLARE_MAC_BUF(mac);
1829
1830         if (len < 24 + 2) {
1831                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1832                        "received from %s - ignored\n",
1833                        dev->name, len, print_mac(mac, mgmt->sa));
1834                 return;
1835         }
1836
1837         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1838                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1839                        "unknown AP (SA=%s BSSID=%s) - "
1840                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1841                        print_mac(mac, mgmt->bssid));
1842                 return;
1843         }
1844
1845         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1846
1847         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1848                " (reason=%d)\n",
1849                dev->name, print_mac(mac, mgmt->sa), reason_code);
1850
1851         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1852                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1853         }
1854
1855         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1856             ifsta->state == IEEE80211_ASSOCIATE ||
1857             ifsta->state == IEEE80211_ASSOCIATED) {
1858                 ifsta->state = IEEE80211_AUTHENTICATE;
1859                 mod_timer(&ifsta->timer, jiffies +
1860                                       IEEE80211_RETRY_AUTH_INTERVAL);
1861         }
1862
1863         ieee80211_set_disassoc(dev, ifsta, 1);
1864         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1865 }
1866
1867
1868 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1869                                        struct ieee80211_if_sta *ifsta,
1870                                        struct ieee80211_mgmt *mgmt,
1871                                        size_t len)
1872 {
1873         u16 reason_code;
1874         DECLARE_MAC_BUF(mac);
1875
1876         if (len < 24 + 2) {
1877                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1878                        "received from %s - ignored\n",
1879                        dev->name, len, print_mac(mac, mgmt->sa));
1880                 return;
1881         }
1882
1883         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1884                 printk(KERN_DEBUG "%s: disassociation frame received from "
1885                        "unknown AP (SA=%s BSSID=%s) - "
1886                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1887                        print_mac(mac, mgmt->bssid));
1888                 return;
1889         }
1890
1891         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1892
1893         printk(KERN_DEBUG "%s: RX disassociation from %s"
1894                " (reason=%d)\n",
1895                dev->name, print_mac(mac, mgmt->sa), reason_code);
1896
1897         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1898                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1899
1900         if (ifsta->state == IEEE80211_ASSOCIATED) {
1901                 ifsta->state = IEEE80211_ASSOCIATE;
1902                 mod_timer(&ifsta->timer, jiffies +
1903                                       IEEE80211_RETRY_AUTH_INTERVAL);
1904         }
1905
1906         ieee80211_set_disassoc(dev, ifsta, 0);
1907 }
1908
1909
1910 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1911                                          struct ieee80211_if_sta *ifsta,
1912                                          struct ieee80211_mgmt *mgmt,
1913                                          size_t len,
1914                                          int reassoc)
1915 {
1916         struct ieee80211_local *local = sdata->local;
1917         struct net_device *dev = sdata->dev;
1918         struct ieee80211_supported_band *sband;
1919         struct sta_info *sta;
1920         u64 rates, basic_rates;
1921         u16 capab_info, status_code, aid;
1922         struct ieee802_11_elems elems;
1923         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1924         u8 *pos;
1925         int i, j;
1926         DECLARE_MAC_BUF(mac);
1927         bool have_higher_than_11mbit = false;
1928
1929         /* AssocResp and ReassocResp have identical structure, so process both
1930          * of them in this function. */
1931
1932         if (ifsta->state != IEEE80211_ASSOCIATE) {
1933                 printk(KERN_DEBUG "%s: association frame received from "
1934                        "%s, but not in associate state - ignored\n",
1935                        dev->name, print_mac(mac, mgmt->sa));
1936                 return;
1937         }
1938
1939         if (len < 24 + 6) {
1940                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1941                        "received from %s - ignored\n",
1942                        dev->name, len, print_mac(mac, mgmt->sa));
1943                 return;
1944         }
1945
1946         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1947                 printk(KERN_DEBUG "%s: association frame received from "
1948                        "unknown AP (SA=%s BSSID=%s) - "
1949                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1950                        print_mac(mac, mgmt->bssid));
1951                 return;
1952         }
1953
1954         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1955         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1956         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1957
1958         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1959                "status=%d aid=%d)\n",
1960                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1961                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1962
1963         if (status_code != WLAN_STATUS_SUCCESS) {
1964                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1965                        dev->name, status_code);
1966                 /* if this was a reassociation, ensure we try a "full"
1967                  * association next time. This works around some broken APs
1968                  * which do not correctly reject reassociation requests. */
1969                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1970                 return;
1971         }
1972
1973         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1974                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1975                        "set\n", dev->name, aid);
1976         aid &= ~(BIT(15) | BIT(14));
1977
1978         pos = mgmt->u.assoc_resp.variable;
1979         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1980
1981         if (!elems.supp_rates) {
1982                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1983                        dev->name);
1984                 return;
1985         }
1986
1987         printk(KERN_DEBUG "%s: associated\n", dev->name);
1988         ifsta->aid = aid;
1989         ifsta->ap_capab = capab_info;
1990
1991         kfree(ifsta->assocresp_ies);
1992         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1993         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1994         if (ifsta->assocresp_ies)
1995                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1996
1997         rcu_read_lock();
1998
1999         /* Add STA entry for the AP */
2000         sta = sta_info_get(local, ifsta->bssid);
2001         if (!sta) {
2002                 struct ieee80211_sta_bss *bss;
2003                 int err;
2004
2005                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2006                 if (!sta) {
2007                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2008                                " the AP\n", dev->name);
2009                         rcu_read_unlock();
2010                         return;
2011                 }
2012                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2013                                            local->hw.conf.channel->center_freq,
2014                                            ifsta->ssid, ifsta->ssid_len);
2015                 if (bss) {
2016                         sta->last_rssi = bss->rssi;
2017                         sta->last_signal = bss->signal;
2018                         sta->last_noise = bss->noise;
2019                         ieee80211_rx_bss_put(dev, bss);
2020                 }
2021
2022                 err = sta_info_insert(sta);
2023                 if (err) {
2024                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2025                                " the AP (error %d)\n", dev->name, err);
2026                         rcu_read_unlock();
2027                         return;
2028                 }
2029         }
2030
2031         /*
2032          * FIXME: Do we really need to update the sta_info's information here?
2033          *        We already know about the AP (we found it in our list) so it
2034          *        should already be filled with the right info, no?
2035          *        As is stands, all this is racy because typically we assume
2036          *        the information that is filled in here (except flags) doesn't
2037          *        change while a STA structure is alive. As such, it should move
2038          *        to between the sta_info_alloc() and sta_info_insert() above.
2039          */
2040
2041         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2042                       WLAN_STA_AUTHORIZED;
2043
2044         rates = 0;
2045         basic_rates = 0;
2046         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2047
2048         for (i = 0; i < elems.supp_rates_len; i++) {
2049                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2050
2051                 if (rate > 110)
2052                         have_higher_than_11mbit = true;
2053
2054                 for (j = 0; j < sband->n_bitrates; j++) {
2055                         if (sband->bitrates[j].bitrate == rate)
2056                                 rates |= BIT(j);
2057                         if (elems.supp_rates[i] & 0x80)
2058                                 basic_rates |= BIT(j);
2059                 }
2060         }
2061
2062         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2063                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2064
2065                 if (rate > 110)
2066                         have_higher_than_11mbit = true;
2067
2068                 for (j = 0; j < sband->n_bitrates; j++) {
2069                         if (sband->bitrates[j].bitrate == rate)
2070                                 rates |= BIT(j);
2071                         if (elems.ext_supp_rates[i] & 0x80)
2072                                 basic_rates |= BIT(j);
2073                 }
2074         }
2075
2076         sta->supp_rates[local->hw.conf.channel->band] = rates;
2077         sdata->basic_rates = basic_rates;
2078
2079         /* cf. IEEE 802.11 9.2.12 */
2080         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2081             have_higher_than_11mbit)
2082                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2083         else
2084                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2085
2086         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
2087                 struct ieee80211_ht_bss_info bss_info;
2088                 ieee80211_ht_cap_ie_to_ht_info(
2089                                 (struct ieee80211_ht_cap *)
2090                                 elems.ht_cap_elem, &sta->ht_info);
2091                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2092                                 (struct ieee80211_ht_addt_info *)
2093                                 elems.ht_info_elem, &bss_info);
2094                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2095         }
2096
2097         rate_control_rate_init(sta, local);
2098
2099         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2100                 sta->flags |= WLAN_STA_WME;
2101                 rcu_read_unlock();
2102                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2103                                          elems.wmm_param_len);
2104         } else
2105                 rcu_read_unlock();
2106
2107         /* set AID and assoc capability,
2108          * ieee80211_set_associated() will tell the driver */
2109         bss_conf->aid = aid;
2110         bss_conf->assoc_capability = capab_info;
2111         ieee80211_set_associated(dev, ifsta, 1);
2112
2113         ieee80211_associated(dev, ifsta);
2114 }
2115
2116
2117 /* Caller must hold local->sta_bss_lock */
2118 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2119                                         struct ieee80211_sta_bss *bss)
2120 {
2121         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2122         u8 hash_idx;
2123
2124         if (bss_mesh_cfg(bss))
2125                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2126                                         bss_mesh_id_len(bss));
2127         else
2128                 hash_idx = STA_HASH(bss->bssid);
2129
2130         bss->hnext = local->sta_bss_hash[hash_idx];
2131         local->sta_bss_hash[hash_idx] = bss;
2132 }
2133
2134
2135 /* Caller must hold local->sta_bss_lock */
2136 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2137                                         struct ieee80211_sta_bss *bss)
2138 {
2139         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2140         struct ieee80211_sta_bss *b, *prev = NULL;
2141         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2142         while (b) {
2143                 if (b == bss) {
2144                         if (!prev)
2145                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2146                                         bss->hnext;
2147                         else
2148                                 prev->hnext = bss->hnext;
2149                         break;
2150                 }
2151                 prev = b;
2152                 b = b->hnext;
2153         }
2154 }
2155
2156
2157 static struct ieee80211_sta_bss *
2158 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2159                      u8 *ssid, u8 ssid_len)
2160 {
2161         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2162         struct ieee80211_sta_bss *bss;
2163
2164         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2165         if (!bss)
2166                 return NULL;
2167         atomic_inc(&bss->users);
2168         atomic_inc(&bss->users);
2169         memcpy(bss->bssid, bssid, ETH_ALEN);
2170         bss->freq = freq;
2171         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2172                 memcpy(bss->ssid, ssid, ssid_len);
2173                 bss->ssid_len = ssid_len;
2174         }
2175
2176         spin_lock_bh(&local->sta_bss_lock);
2177         /* TODO: order by RSSI? */
2178         list_add_tail(&bss->list, &local->sta_bss_list);
2179         __ieee80211_rx_bss_hash_add(dev, bss);
2180         spin_unlock_bh(&local->sta_bss_lock);
2181         return bss;
2182 }
2183
2184 static struct ieee80211_sta_bss *
2185 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2186                      u8 *ssid, u8 ssid_len)
2187 {
2188         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2189         struct ieee80211_sta_bss *bss;
2190
2191         spin_lock_bh(&local->sta_bss_lock);
2192         bss = local->sta_bss_hash[STA_HASH(bssid)];
2193         while (bss) {
2194                 if (!bss_mesh_cfg(bss) &&
2195                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2196                     bss->freq == freq &&
2197                     bss->ssid_len == ssid_len &&
2198                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2199                         atomic_inc(&bss->users);
2200                         break;
2201                 }
2202                 bss = bss->hnext;
2203         }
2204         spin_unlock_bh(&local->sta_bss_lock);
2205         return bss;
2206 }
2207
2208 #ifdef CONFIG_MAC80211_MESH
2209 static struct ieee80211_sta_bss *
2210 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2211                           u8 *mesh_cfg, int freq)
2212 {
2213         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2214         struct ieee80211_sta_bss *bss;
2215
2216         spin_lock_bh(&local->sta_bss_lock);
2217         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2218         while (bss) {
2219                 if (bss_mesh_cfg(bss) &&
2220                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2221                     bss->freq == freq &&
2222                     mesh_id_len == bss->mesh_id_len &&
2223                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2224                                                  mesh_id_len))) {
2225                         atomic_inc(&bss->users);
2226                         break;
2227                 }
2228                 bss = bss->hnext;
2229         }
2230         spin_unlock_bh(&local->sta_bss_lock);
2231         return bss;
2232 }
2233
2234 static struct ieee80211_sta_bss *
2235 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2236                           u8 *mesh_cfg, int mesh_config_len, int freq)
2237 {
2238         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2239         struct ieee80211_sta_bss *bss;
2240
2241         if (mesh_config_len != MESH_CFG_LEN)
2242                 return NULL;
2243
2244         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2245         if (!bss)
2246                 return NULL;
2247
2248         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2249         if (!bss->mesh_cfg) {
2250                 kfree(bss);
2251                 return NULL;
2252         }
2253
2254         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2255                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2256                 if (!bss->mesh_id) {
2257                         kfree(bss->mesh_cfg);
2258                         kfree(bss);
2259                         return NULL;
2260                 }
2261                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2262         }
2263
2264         atomic_inc(&bss->users);
2265         atomic_inc(&bss->users);
2266         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2267         bss->mesh_id_len = mesh_id_len;
2268         bss->freq = freq;
2269         spin_lock_bh(&local->sta_bss_lock);
2270         /* TODO: order by RSSI? */
2271         list_add_tail(&bss->list, &local->sta_bss_list);
2272         __ieee80211_rx_bss_hash_add(dev, bss);
2273         spin_unlock_bh(&local->sta_bss_lock);
2274         return bss;
2275 }
2276 #endif
2277
2278 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2279 {
2280         kfree(bss->wpa_ie);
2281         kfree(bss->rsn_ie);
2282         kfree(bss->wmm_ie);
2283         kfree(bss->ht_ie);
2284         kfree(bss_mesh_id(bss));
2285         kfree(bss_mesh_cfg(bss));
2286         kfree(bss);
2287 }
2288
2289
2290 static void ieee80211_rx_bss_put(struct net_device *dev,
2291                                  struct ieee80211_sta_bss *bss)
2292 {
2293         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2294
2295         local_bh_disable();
2296         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2297                 local_bh_enable();
2298                 return;
2299         }
2300
2301         __ieee80211_rx_bss_hash_del(dev, bss);
2302         list_del(&bss->list);
2303         spin_unlock_bh(&local->sta_bss_lock);
2304         ieee80211_rx_bss_free(bss);
2305 }
2306
2307
2308 void ieee80211_rx_bss_list_init(struct net_device *dev)
2309 {
2310         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2311         spin_lock_init(&local->sta_bss_lock);
2312         INIT_LIST_HEAD(&local->sta_bss_list);
2313 }
2314
2315
2316 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2317 {
2318         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2319         struct ieee80211_sta_bss *bss, *tmp;
2320
2321         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2322                 ieee80211_rx_bss_put(dev, bss);
2323 }
2324
2325
2326 static int ieee80211_sta_join_ibss(struct net_device *dev,
2327                                    struct ieee80211_if_sta *ifsta,
2328                                    struct ieee80211_sta_bss *bss)
2329 {
2330         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2331         int res, rates, i, j;
2332         struct sk_buff *skb;
2333         struct ieee80211_mgmt *mgmt;
2334         struct ieee80211_tx_control control;
2335         struct rate_selection ratesel;
2336         u8 *pos;
2337         struct ieee80211_sub_if_data *sdata;
2338         struct ieee80211_supported_band *sband;
2339         union iwreq_data wrqu;
2340
2341         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2342
2343         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2344
2345         /* Remove possible STA entries from other IBSS networks. */
2346         sta_info_flush_delayed(sdata);
2347
2348         if (local->ops->reset_tsf) {
2349                 /* Reset own TSF to allow time synchronization work. */
2350                 local->ops->reset_tsf(local_to_hw(local));
2351         }
2352         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2353         res = ieee80211_if_config(dev);
2354         if (res)
2355                 return res;
2356
2357         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2358
2359         sdata->drop_unencrypted = bss->capability &
2360                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2361
2362         res = ieee80211_set_freq(dev, bss->freq);
2363
2364         if (res)
2365                 return res;
2366
2367         /* Set beacon template */
2368         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2369         do {
2370                 if (!skb)
2371                         break;
2372
2373                 skb_reserve(skb, local->hw.extra_tx_headroom);
2374
2375                 mgmt = (struct ieee80211_mgmt *)
2376                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2377                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2378                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2379                                                    IEEE80211_STYPE_BEACON);
2380                 memset(mgmt->da, 0xff, ETH_ALEN);
2381                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2382                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2383                 mgmt->u.beacon.beacon_int =
2384                         cpu_to_le16(local->hw.conf.beacon_int);
2385                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2386
2387                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2388                 *pos++ = WLAN_EID_SSID;
2389                 *pos++ = ifsta->ssid_len;
2390                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2391
2392                 rates = bss->supp_rates_len;
2393                 if (rates > 8)
2394                         rates = 8;
2395                 pos = skb_put(skb, 2 + rates);
2396                 *pos++ = WLAN_EID_SUPP_RATES;
2397                 *pos++ = rates;
2398                 memcpy(pos, bss->supp_rates, rates);
2399
2400                 if (bss->band == IEEE80211_BAND_2GHZ) {
2401                         pos = skb_put(skb, 2 + 1);
2402                         *pos++ = WLAN_EID_DS_PARAMS;
2403                         *pos++ = 1;
2404                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2405                 }
2406
2407                 pos = skb_put(skb, 2 + 2);
2408                 *pos++ = WLAN_EID_IBSS_PARAMS;
2409                 *pos++ = 2;
2410                 /* FIX: set ATIM window based on scan results */
2411                 *pos++ = 0;
2412                 *pos++ = 0;
2413
2414                 if (bss->supp_rates_len > 8) {
2415                         rates = bss->supp_rates_len - 8;
2416                         pos = skb_put(skb, 2 + rates);
2417                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2418                         *pos++ = rates;
2419                         memcpy(pos, &bss->supp_rates[8], rates);
2420                 }
2421
2422                 memset(&control, 0, sizeof(control));
2423                 rate_control_get_rate(dev, sband, skb, &ratesel);
2424                 if (!ratesel.rate) {
2425                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2426                                "for IBSS beacon\n", dev->name);
2427                         break;
2428                 }
2429                 control.vif = &sdata->vif;
2430                 control.tx_rate = ratesel.rate;
2431                 if (sdata->bss_conf.use_short_preamble &&
2432                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2433                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2434                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2435                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2436                 control.retry_limit = 1;
2437
2438                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2439                 if (ifsta->probe_resp) {
2440                         mgmt = (struct ieee80211_mgmt *)
2441                                 ifsta->probe_resp->data;
2442                         mgmt->frame_control =
2443                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2444                                              IEEE80211_STYPE_PROBE_RESP);
2445                 } else {
2446                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2447                                "template for IBSS\n", dev->name);
2448                 }
2449
2450                 if (local->ops->beacon_update &&
2451                     local->ops->beacon_update(local_to_hw(local),
2452                                              skb, &control) == 0) {
2453                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2454                                "template\n", dev->name);
2455                         skb = NULL;
2456                 }
2457
2458                 rates = 0;
2459                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2460                 for (i = 0; i < bss->supp_rates_len; i++) {
2461                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2462                         for (j = 0; j < sband->n_bitrates; j++)
2463                                 if (sband->bitrates[j].bitrate == bitrate)
2464                                         rates |= BIT(j);
2465                 }
2466                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2467
2468                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2469         } while (0);
2470
2471         if (skb) {
2472                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2473                        "template\n", dev->name);
2474                 dev_kfree_skb(skb);
2475         }
2476
2477         ifsta->state = IEEE80211_IBSS_JOINED;
2478         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2479
2480         memset(&wrqu, 0, sizeof(wrqu));
2481         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2482         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2483
2484         return res;
2485 }
2486
2487 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2488                             struct ieee802_11_elems *elems,
2489                             enum ieee80211_band band)
2490 {
2491         struct ieee80211_supported_band *sband;
2492         struct ieee80211_rate *bitrates;
2493         size_t num_rates;
2494         u64 supp_rates;
2495         int i, j;
2496         sband = local->hw.wiphy->bands[band];
2497
2498         if (!sband) {
2499                 WARN_ON(1);
2500                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2501         }
2502
2503         bitrates = sband->bitrates;
2504         num_rates = sband->n_bitrates;
2505         supp_rates = 0;
2506         for (i = 0; i < elems->supp_rates_len +
2507                      elems->ext_supp_rates_len; i++) {
2508                 u8 rate = 0;
2509                 int own_rate;
2510                 if (i < elems->supp_rates_len)
2511                         rate = elems->supp_rates[i];
2512                 else if (elems->ext_supp_rates)
2513                         rate = elems->ext_supp_rates
2514                                 [i - elems->supp_rates_len];
2515                 own_rate = 5 * (rate & 0x7f);
2516                 for (j = 0; j < num_rates; j++)
2517                         if (bitrates[j].bitrate == own_rate)
2518                                 supp_rates |= BIT(j);
2519         }
2520         return supp_rates;
2521 }
2522
2523
2524 static void ieee80211_rx_bss_info(struct net_device *dev,
2525                                   struct ieee80211_mgmt *mgmt,
2526                                   size_t len,
2527                                   struct ieee80211_rx_status *rx_status,
2528                                   int beacon)
2529 {
2530         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2531         struct ieee802_11_elems elems;
2532         size_t baselen;
2533         int freq, clen;
2534         struct ieee80211_sta_bss *bss;
2535         struct sta_info *sta;
2536         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2537         u64 beacon_timestamp, rx_timestamp;
2538         struct ieee80211_channel *channel;
2539         DECLARE_MAC_BUF(mac);
2540         DECLARE_MAC_BUF(mac2);
2541
2542         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2543                 return; /* ignore ProbeResp to foreign address */
2544
2545 #if 0
2546         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2547                dev->name, beacon ? "Beacon" : "Probe Response",
2548                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2549 #endif
2550
2551         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2552         if (baselen > len)
2553                 return;
2554
2555         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2556         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2557
2558         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2559             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2560                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2561                                                 rx_status->band);
2562
2563                 mesh_neighbour_update(mgmt->sa, rates, dev,
2564                                       mesh_peer_accepts_plinks(&elems, dev));
2565         }
2566
2567         rcu_read_lock();
2568
2569         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2570             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2571             (sta = sta_info_get(local, mgmt->sa))) {
2572                 u64 prev_rates;
2573                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2574                                                         rx_status->band);
2575
2576                 prev_rates = sta->supp_rates[rx_status->band];
2577                 sta->supp_rates[rx_status->band] &= supp_rates;
2578                 if (sta->supp_rates[rx_status->band] == 0) {
2579                         /* No matching rates - this should not really happen.
2580                          * Make sure that at least one rate is marked
2581                          * supported to avoid issues with TX rate ctrl. */
2582                         sta->supp_rates[rx_status->band] =
2583                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2584                 }
2585                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2586                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2587                                "%s based on beacon info (0x%llx & 0x%llx -> "
2588                                "0x%llx)\n",
2589                                dev->name, print_mac(mac, sta->addr),
2590                                (unsigned long long) prev_rates,
2591                                (unsigned long long) supp_rates,
2592                                (unsigned long long) sta->supp_rates[rx_status->band]);
2593                 }
2594         }
2595
2596         rcu_read_unlock();
2597
2598         if (elems.ds_params && elems.ds_params_len == 1)
2599                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2600         else
2601                 freq = rx_status->freq;
2602
2603         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2604
2605         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2606                 return;
2607
2608 #ifdef CONFIG_MAC80211_MESH
2609         if (elems.mesh_config)
2610                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2611                                 elems.mesh_id_len, elems.mesh_config, freq);
2612         else
2613 #endif
2614                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2615                                            elems.ssid, elems.ssid_len);
2616         if (!bss) {
2617 #ifdef CONFIG_MAC80211_MESH
2618                 if (elems.mesh_config)
2619                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2620                                 elems.mesh_id_len, elems.mesh_config,
2621                                 elems.mesh_config_len, freq);
2622                 else
2623 #endif
2624                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2625                                                    elems.ssid, elems.ssid_len);
2626                 if (!bss)
2627                         return;
2628         } else {
2629 #if 0
2630                 /* TODO: order by RSSI? */
2631                 spin_lock_bh(&local->sta_bss_lock);
2632                 list_move_tail(&bss->list, &local->sta_bss_list);
2633                 spin_unlock_bh(&local->sta_bss_lock);
2634 #endif
2635         }
2636
2637         /* save the ERP value so that it is available at association time */
2638         if (elems.erp_info && elems.erp_info_len >= 1) {
2639                 bss->erp_value = elems.erp_info[0];
2640                 bss->has_erp_value = 1;
2641         }
2642
2643         if (elems.ht_cap_elem &&
2644              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2645              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2646                 kfree(bss->ht_ie);
2647                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2648                 if (bss->ht_ie) {
2649                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2650                                 elems.ht_cap_elem_len + 2);
2651                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2652                 } else
2653                         bss->ht_ie_len = 0;
2654         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2655                 kfree(bss->ht_ie);
2656                 bss->ht_ie = NULL;
2657                 bss->ht_ie_len = 0;
2658         }
2659
2660         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2661         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2662
2663         bss->supp_rates_len = 0;
2664         if (elems.supp_rates) {
2665                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2666                 if (clen > elems.supp_rates_len)
2667                         clen = elems.supp_rates_len;
2668                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2669                        clen);
2670                 bss->supp_rates_len += clen;
2671         }
2672         if (elems.ext_supp_rates) {
2673                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2674                 if (clen > elems.ext_supp_rates_len)
2675                         clen = elems.ext_supp_rates_len;
2676                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2677                        elems.ext_supp_rates, clen);
2678                 bss->supp_rates_len += clen;
2679         }
2680
2681         bss->band = rx_status->band;
2682
2683         bss->timestamp = beacon_timestamp;
2684         bss->last_update = jiffies;
2685         bss->rssi = rx_status->ssi;
2686         bss->signal = rx_status->signal;
2687         bss->noise = rx_status->noise;
2688         if (!beacon && !bss->probe_resp)
2689                 bss->probe_resp = true;
2690
2691         /*
2692          * In STA mode, the remaining parameters should not be overridden
2693          * by beacons because they're not necessarily accurate there.
2694          */
2695         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2696             bss->probe_resp && beacon) {
2697                 ieee80211_rx_bss_put(dev, bss);
2698                 return;
2699         }
2700
2701         if (elems.wpa &&
2702             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2703              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2704                 kfree(bss->wpa_ie);
2705                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2706                 if (bss->wpa_ie) {
2707                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2708                         bss->wpa_ie_len = elems.wpa_len + 2;
2709                 } else
2710                         bss->wpa_ie_len = 0;
2711         } else if (!elems.wpa && bss->wpa_ie) {
2712                 kfree(bss->wpa_ie);
2713                 bss->wpa_ie = NULL;
2714                 bss->wpa_ie_len = 0;
2715         }
2716
2717         if (elems.rsn &&
2718             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2719              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2720                 kfree(bss->rsn_ie);
2721                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2722                 if (bss->rsn_ie) {
2723                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2724                         bss->rsn_ie_len = elems.rsn_len + 2;
2725                 } else
2726                         bss->rsn_ie_len = 0;
2727         } else if (!elems.rsn && bss->rsn_ie) {
2728                 kfree(bss->rsn_ie);
2729                 bss->rsn_ie = NULL;
2730                 bss->rsn_ie_len = 0;
2731         }
2732
2733         /*
2734          * Cf.
2735          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2736          *
2737          * quoting:
2738          *
2739          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2740          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2741          * Alliance (September 1, 2004) is incorporated by reference herein.
2742          * The inclusion of the WMM Parameters in probe responses and
2743          * association responses is mandatory for WMM enabled networks. The
2744          * inclusion of the WMM Parameters in beacons, however, is optional.
2745          */
2746
2747         if (elems.wmm_param &&
2748             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2749              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2750                 kfree(bss->wmm_ie);
2751                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2752                 if (bss->wmm_ie) {
2753                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2754                                elems.wmm_param_len + 2);
2755                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2756                 } else
2757                         bss->wmm_ie_len = 0;
2758         } else if (elems.wmm_info &&
2759                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2760                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2761                  /* As for certain AP's Fifth bit is not set in WMM IE in
2762                   * beacon frames.So while parsing the beacon frame the
2763                   * wmm_info structure is used instead of wmm_param.
2764                   * wmm_info structure was never used to set bss->wmm_ie.
2765                   * This code fixes this problem by copying the WME
2766                   * information from wmm_info to bss->wmm_ie and enabling
2767                   * n-band association.
2768                   */
2769                 kfree(bss->wmm_ie);
2770                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2771                 if (bss->wmm_ie) {
2772                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2773                                elems.wmm_info_len + 2);
2774                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2775                 } else
2776                         bss->wmm_ie_len = 0;
2777         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2778                 kfree(bss->wmm_ie);
2779                 bss->wmm_ie = NULL;
2780                 bss->wmm_ie_len = 0;
2781         }
2782
2783         /* check if we need to merge IBSS */
2784         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2785             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2786             bss->capability & WLAN_CAPABILITY_IBSS &&
2787             bss->freq == local->oper_channel->center_freq &&
2788             elems.ssid_len == sdata->u.sta.ssid_len &&
2789             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2790                 if (rx_status->flag & RX_FLAG_TSFT) {
2791                         /* in order for correct IBSS merging we need mactime
2792                          *
2793                          * since mactime is defined as the time the first data
2794                          * symbol of the frame hits the PHY, and the timestamp
2795                          * of the beacon is defined as "the time that the data
2796                          * symbol containing the first bit of the timestamp is
2797                          * transmitted to the PHY plus the transmitting STA’s
2798                          * delays through its local PHY from the MAC-PHY
2799                          * interface to its interface with the WM"
2800                          * (802.11 11.1.2) - equals the time this bit arrives at
2801                          * the receiver - we have to take into account the
2802                          * offset between the two.
2803                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2804                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2805                          */
2806                         int rate = local->hw.wiphy->bands[rx_status->band]->
2807                                         bitrates[rx_status->rate_idx].bitrate;
2808                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2809                 } else if (local && local->ops && local->ops->get_tsf)
2810                         /* second best option: get current TSF */
2811                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2812                 else
2813                         /* can't merge without knowing the TSF */
2814                         rx_timestamp = -1LLU;
2815 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2816                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2817                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2818                        print_mac(mac, mgmt->sa),
2819                        print_mac(mac2, mgmt->bssid),
2820                        (unsigned long long)rx_timestamp,
2821                        (unsigned long long)beacon_timestamp,
2822                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2823                        jiffies);
2824 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2825                 if (beacon_timestamp > rx_timestamp) {
2826 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2827                         if (net_ratelimit())
2828 #endif
2829                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2830                                        "local TSF - IBSS merge with BSSID %s\n",
2831                                        dev->name, print_mac(mac, mgmt->bssid));
2832                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2833                         ieee80211_ibss_add_sta(dev, NULL,
2834                                                mgmt->bssid, mgmt->sa);
2835                 }
2836         }
2837
2838         ieee80211_rx_bss_put(dev, bss);
2839 }
2840
2841
2842 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2843                                          struct ieee80211_mgmt *mgmt,
2844                                          size_t len,
2845                                          struct ieee80211_rx_status *rx_status)
2846 {
2847         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2848 }
2849
2850
2851 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2852                                      struct ieee80211_mgmt *mgmt,
2853                                      size_t len,
2854                                      struct ieee80211_rx_status *rx_status)
2855 {
2856         struct ieee80211_sub_if_data *sdata;
2857         struct ieee80211_if_sta *ifsta;
2858         size_t baselen;
2859         struct ieee802_11_elems elems;
2860         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2861         struct ieee80211_conf *conf = &local->hw.conf;
2862         u32 changed = 0;
2863
2864         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2865
2866         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2867         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2868                 return;
2869         ifsta = &sdata->u.sta;
2870
2871         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2872             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2873                 return;
2874
2875         /* Process beacon from the current BSS */
2876         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2877         if (baselen > len)
2878                 return;
2879
2880         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2881
2882         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2883                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2884                                          elems.wmm_param_len);
2885         }
2886
2887         /* Do not send changes to driver if we are scanning. This removes
2888          * requirement that driver's bss_info_changed function needs to be
2889          * atomic. */
2890         if (local->sta_sw_scanning || local->sta_hw_scanning)
2891                 return;
2892
2893         if (elems.erp_info && elems.erp_info_len >= 1)
2894                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2895         else {
2896                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2897                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2898                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2899         }
2900
2901         if (elems.ht_cap_elem && elems.ht_info_elem &&
2902             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2903                 struct ieee80211_ht_bss_info bss_info;
2904
2905                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2906                                 (struct ieee80211_ht_addt_info *)
2907                                 elems.ht_info_elem, &bss_info);
2908                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2909                                                &bss_info);
2910         }
2911
2912         ieee80211_bss_info_change_notify(sdata, changed);
2913 }
2914
2915
2916 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2917                                         struct ieee80211_if_sta *ifsta,
2918                                         struct ieee80211_mgmt *mgmt,
2919                                         size_t len,
2920                                         struct ieee80211_rx_status *rx_status)
2921 {
2922         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2923         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2924         int tx_last_beacon;
2925         struct sk_buff *skb;
2926         struct ieee80211_mgmt *resp;
2927         u8 *pos, *end;
2928         DECLARE_MAC_BUF(mac);
2929 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2930         DECLARE_MAC_BUF(mac2);
2931         DECLARE_MAC_BUF(mac3);
2932 #endif
2933
2934         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2935             ifsta->state != IEEE80211_IBSS_JOINED ||
2936             len < 24 + 2 || !ifsta->probe_resp)
2937                 return;
2938
2939         if (local->ops->tx_last_beacon)
2940                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2941         else
2942                 tx_last_beacon = 1;
2943
2944 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2945         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2946                "%s (tx_last_beacon=%d)\n",
2947                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2948                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2949 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2950
2951         if (!tx_last_beacon)
2952                 return;
2953
2954         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2955             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2956                 return;
2957
2958         end = ((u8 *) mgmt) + len;
2959         pos = mgmt->u.probe_req.variable;
2960         if (pos[0] != WLAN_EID_SSID ||
2961             pos + 2 + pos[1] > end) {
2962                 if (net_ratelimit()) {
2963                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2964                                "from %s\n",
2965                                dev->name, print_mac(mac, mgmt->sa));
2966                 }
2967                 return;
2968         }
2969         if (pos[1] != 0 &&
2970             (pos[1] != ifsta->ssid_len ||
2971              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2972                 /* Ignore ProbeReq for foreign SSID */
2973                 return;
2974         }
2975
2976         /* Reply with ProbeResp */
2977         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2978         if (!skb)
2979                 return;
2980
2981         resp = (struct ieee80211_mgmt *) skb->data;
2982         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2983 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2984         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2985                dev->name, print_mac(mac, resp->da));
2986 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2987         ieee80211_sta_tx(dev, skb, 0);
2988 }
2989
2990 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2991                                      struct ieee80211_if_sta *ifsta,
2992                                      struct ieee80211_mgmt *mgmt,
2993                                      size_t len,
2994                                      struct ieee80211_rx_status *rx_status)
2995 {
2996         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2997
2998         if (len < IEEE80211_MIN_ACTION_SIZE)
2999                 return;
3000
3001         switch (mgmt->u.action.category) {
3002         case WLAN_CATEGORY_BACK:
3003                 switch (mgmt->u.action.u.addba_req.action_code) {
3004                 case WLAN_ACTION_ADDBA_REQ:
3005                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3006                                    sizeof(mgmt->u.action.u.addba_req)))
3007                                 break;
3008                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3009                         break;
3010                 case WLAN_ACTION_ADDBA_RESP:
3011                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3012                                    sizeof(mgmt->u.action.u.addba_resp)))
3013                                 break;
3014                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3015                         break;
3016                 case WLAN_ACTION_DELBA:
3017                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3018                                    sizeof(mgmt->u.action.u.delba)))
3019                                 break;
3020                         ieee80211_sta_process_delba(dev, mgmt, len);
3021                         break;
3022                 default:
3023                         if (net_ratelimit())
3024                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3025                                         dev->name);
3026                         break;
3027                 }
3028                 break;
3029         case PLINK_CATEGORY:
3030                 if (ieee80211_vif_is_mesh(&sdata->vif))
3031                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3032                 break;
3033         case MESH_PATH_SEL_CATEGORY:
3034                 if (ieee80211_vif_is_mesh(&sdata->vif))
3035                         mesh_rx_path_sel_frame(dev, mgmt, len);
3036                 break;
3037         default:
3038                 if (net_ratelimit())
3039                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
3040                         "category=%d\n", dev->name, mgmt->u.action.category);
3041                 break;
3042         }
3043 }
3044
3045 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3046                            struct ieee80211_rx_status *rx_status)
3047 {
3048         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3049         struct ieee80211_sub_if_data *sdata;
3050         struct ieee80211_if_sta *ifsta;
3051         struct ieee80211_mgmt *mgmt;
3052         u16 fc;
3053
3054         if (skb->len < 24)
3055                 goto fail;
3056
3057         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3058         ifsta = &sdata->u.sta;
3059
3060         mgmt = (struct ieee80211_mgmt *) skb->data;
3061         fc = le16_to_cpu(mgmt->frame_control);
3062
3063         switch (fc & IEEE80211_FCTL_STYPE) {
3064         case IEEE80211_STYPE_PROBE_REQ:
3065         case IEEE80211_STYPE_PROBE_RESP:
3066         case IEEE80211_STYPE_BEACON:
3067         case IEEE80211_STYPE_ACTION:
3068                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3069         case IEEE80211_STYPE_AUTH:
3070         case IEEE80211_STYPE_ASSOC_RESP:
3071         case IEEE80211_STYPE_REASSOC_RESP:
3072         case IEEE80211_STYPE_DEAUTH:
3073         case IEEE80211_STYPE_DISASSOC:
3074                 skb_queue_tail(&ifsta->skb_queue, skb);
3075                 queue_work(local->hw.workqueue, &ifsta->work);
3076                 return;
3077         default:
3078                 printk(KERN_DEBUG "%s: received unknown management frame - "
3079                        "stype=%d\n", dev->name,
3080                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3081                 break;
3082         }
3083
3084  fail:
3085         kfree_skb(skb);
3086 }
3087
3088
3089 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3090                                          struct sk_buff *skb)
3091 {
3092         struct ieee80211_rx_status *rx_status;
3093         struct ieee80211_sub_if_data *sdata;
3094         struct ieee80211_if_sta *ifsta;
3095         struct ieee80211_mgmt *mgmt;
3096         u16 fc;
3097
3098         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3099         ifsta = &sdata->u.sta;
3100
3101         rx_status = (struct ieee80211_rx_status *) skb->cb;
3102         mgmt = (struct ieee80211_mgmt *) skb->data;
3103         fc = le16_to_cpu(mgmt->frame_control);
3104
3105         switch (fc & IEEE80211_FCTL_STYPE) {
3106         case IEEE80211_STYPE_PROBE_REQ:
3107                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3108                                             rx_status);
3109                 break;
3110         case IEEE80211_STYPE_PROBE_RESP:
3111                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3112                 break;
3113         case IEEE80211_STYPE_BEACON:
3114                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3115                 break;
3116         case IEEE80211_STYPE_AUTH:
3117                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3118                 break;
3119         case IEEE80211_STYPE_ASSOC_RESP:
3120                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3121                 break;
3122         case IEEE80211_STYPE_REASSOC_RESP:
3123                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3124                 break;
3125         case IEEE80211_STYPE_DEAUTH:
3126                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3127                 break;
3128         case IEEE80211_STYPE_DISASSOC:
3129                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3130                 break;
3131         case IEEE80211_STYPE_ACTION:
3132                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3133                 break;
3134         }
3135
3136         kfree_skb(skb);
3137 }
3138
3139
3140 ieee80211_rx_result
3141 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3142                       struct ieee80211_rx_status *rx_status)
3143 {
3144         struct ieee80211_mgmt *mgmt;
3145         u16 fc;
3146
3147         if (skb->len < 2)
3148                 return RX_DROP_UNUSABLE;
3149
3150         mgmt = (struct ieee80211_mgmt *) skb->data;
3151         fc = le16_to_cpu(mgmt->frame_control);
3152
3153         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3154                 return RX_CONTINUE;
3155
3156         if (skb->len < 24)
3157                 return RX_DROP_MONITOR;
3158
3159         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3160                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3161                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3162                                                      skb->len, rx_status);
3163                         dev_kfree_skb(skb);
3164                         return RX_QUEUED;
3165                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3166                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3167                                                  rx_status);
3168                         dev_kfree_skb(skb);
3169                         return RX_QUEUED;
3170                 }
3171         }
3172         return RX_CONTINUE;
3173 }
3174
3175
3176 static int ieee80211_sta_active_ibss(struct net_device *dev)
3177 {
3178         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3179         int active = 0;
3180         struct sta_info *sta;
3181         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3182
3183         rcu_read_lock();
3184
3185         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3186                 if (sta->sdata == sdata &&
3187                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3188                                jiffies)) {
3189                         active++;
3190                         break;
3191                 }
3192         }
3193
3194         rcu_read_unlock();
3195
3196         return active;
3197 }
3198
3199
3200 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3201 {
3202         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3203         struct sta_info *sta, *tmp;
3204         LIST_HEAD(tmp_list);
3205         DECLARE_MAC_BUF(mac);
3206         unsigned long flags;
3207
3208         spin_lock_irqsave(&local->sta_lock, flags);
3209         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3210                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3211                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3212                                dev->name, print_mac(mac, sta->addr));
3213                         __sta_info_unlink(&sta);
3214                         if (sta)
3215                                 list_add(&sta->list, &tmp_list);
3216                 }
3217         spin_unlock_irqrestore(&local->sta_lock, flags);
3218
3219         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3220                 sta_info_destroy(sta);
3221 }
3222
3223
3224 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3225                                      struct ieee80211_if_sta *ifsta)
3226 {
3227         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3228
3229         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3230         if (ieee80211_sta_active_ibss(dev))
3231                 return;
3232
3233         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3234                "IBSS networks with same SSID (merge)\n", dev->name);
3235         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3236 }
3237
3238
3239 #ifdef CONFIG_MAC80211_MESH
3240 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3241                            struct ieee80211_if_sta *ifsta)
3242 {
3243         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3244         bool free_plinks;
3245
3246         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3247         mesh_path_expire(dev);
3248
3249         free_plinks = mesh_plink_availables(sdata);
3250         if (free_plinks != sdata->u.sta.accepting_plinks)
3251                 ieee80211_if_config_beacon(dev);
3252
3253         mod_timer(&ifsta->timer, jiffies +
3254                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3255 }
3256
3257
3258 void ieee80211_start_mesh(struct net_device *dev)
3259 {
3260         struct ieee80211_if_sta *ifsta;
3261         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3262         ifsta = &sdata->u.sta;
3263         ifsta->state = IEEE80211_MESH_UP;
3264         ieee80211_sta_timer((unsigned long)sdata);
3265 }
3266 #endif
3267
3268
3269 void ieee80211_sta_timer(unsigned long data)
3270 {
3271         struct ieee80211_sub_if_data *sdata =
3272                 (struct ieee80211_sub_if_data *) data;
3273         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3274         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3275
3276         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3277         queue_work(local->hw.workqueue, &ifsta->work);
3278 }
3279
3280 void ieee80211_sta_work(struct work_struct *work)
3281 {
3282         struct ieee80211_sub_if_data *sdata =
3283                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3284         struct net_device *dev = sdata->dev;
3285         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3286         struct ieee80211_if_sta *ifsta;
3287         struct sk_buff *skb;
3288
3289         if (!netif_running(dev))
3290                 return;
3291
3292         if (local->sta_sw_scanning || local->sta_hw_scanning)
3293                 return;
3294
3295         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3296             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3297             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3298                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3299                        "(type=%d)\n", dev->name, sdata->vif.type);
3300                 return;
3301         }
3302         ifsta = &sdata->u.sta;
3303
3304         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3305                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3306
3307 #ifdef CONFIG_MAC80211_MESH
3308         if (ifsta->preq_queue_len &&
3309             time_after(jiffies,
3310                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3311                 mesh_path_start_discovery(dev);
3312 #endif
3313
3314         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3315             ifsta->state != IEEE80211_ASSOCIATE &&
3316             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3317                 if (ifsta->scan_ssid_len)
3318                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3319                 else
3320                         ieee80211_sta_start_scan(dev, NULL, 0);
3321                 return;
3322         }
3323
3324         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3325                 if (ieee80211_sta_config_auth(dev, ifsta))
3326                         return;
3327                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3328         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3329                 return;
3330
3331         switch (ifsta->state) {
3332         case IEEE80211_DISABLED:
3333                 break;
3334         case IEEE80211_AUTHENTICATE:
3335                 ieee80211_authenticate(dev, ifsta);
3336                 break;
3337         case IEEE80211_ASSOCIATE:
3338                 ieee80211_associate(dev, ifsta);
3339                 break;
3340         case IEEE80211_ASSOCIATED:
3341                 ieee80211_associated(dev, ifsta);
3342                 break;
3343         case IEEE80211_IBSS_SEARCH:
3344                 ieee80211_sta_find_ibss(dev, ifsta);
3345                 break;
3346         case IEEE80211_IBSS_JOINED:
3347                 ieee80211_sta_merge_ibss(dev, ifsta);
3348                 break;
3349 #ifdef CONFIG_MAC80211_MESH
3350         case IEEE80211_MESH_UP:
3351                 ieee80211_mesh_housekeeping(dev, ifsta);
3352                 break;
3353 #endif
3354         default:
3355                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3356                        ifsta->state);
3357                 break;
3358         }
3359
3360         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3361                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3362                        "mixed-cell disabled - disassociate\n", dev->name);
3363
3364                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3365                 ieee80211_set_disassoc(dev, ifsta, 0);
3366         }
3367 }
3368
3369
3370 static void ieee80211_sta_reset_auth(struct net_device *dev,
3371                                      struct ieee80211_if_sta *ifsta)
3372 {
3373         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3374
3375         if (local->ops->reset_tsf) {
3376                 /* Reset own TSF to allow time synchronization work. */
3377                 local->ops->reset_tsf(local_to_hw(local));
3378         }
3379
3380         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3381
3382
3383         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3384                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3385         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3386                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3387         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3388                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3389         else
3390                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3391         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3392                ifsta->auth_alg);
3393         ifsta->auth_transaction = -1;
3394         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3395         ifsta->auth_tries = ifsta->assoc_tries = 0;
3396         netif_carrier_off(dev);
3397 }
3398
3399
3400 void ieee80211_sta_req_auth(struct net_device *dev,
3401                             struct ieee80211_if_sta *ifsta)
3402 {
3403         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3404         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3405
3406         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3407                 return;
3408
3409         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3410                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3411             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3412                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3413                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3414                 queue_work(local->hw.workqueue, &ifsta->work);
3415         }
3416 }
3417
3418 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3419                                     const char *ssid, int ssid_len)
3420 {
3421         int tmp, hidden_ssid;
3422
3423         if (ssid_len == ifsta->ssid_len &&
3424             !memcmp(ifsta->ssid, ssid, ssid_len))
3425                 return 1;
3426
3427         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3428                 return 0;
3429
3430         hidden_ssid = 1;
3431         tmp = ssid_len;
3432         while (tmp--) {
3433                 if (ssid[tmp] != '\0') {
3434                         hidden_ssid = 0;
3435                         break;
3436                 }
3437         }
3438
3439         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3440                 return 1;
3441
3442         if (ssid_len == 1 && ssid[0] == ' ')
3443                 return 1;
3444
3445         return 0;
3446 }
3447
3448 static int ieee80211_sta_config_auth(struct net_device *dev,
3449                                      struct ieee80211_if_sta *ifsta)
3450 {
3451         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3452         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3453         struct ieee80211_sta_bss *bss, *selected = NULL;
3454         int top_rssi = 0, freq;
3455
3456         spin_lock_bh(&local->sta_bss_lock);
3457         freq = local->oper_channel->center_freq;
3458         list_for_each_entry(bss, &local->sta_bss_list, list) {
3459                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3460                         continue;
3461
3462                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3463                         IEEE80211_STA_AUTO_BSSID_SEL |
3464                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3465                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3466                      !!sdata->default_key))
3467                         continue;
3468
3469                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3470                     bss->freq != freq)
3471                         continue;
3472
3473                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3474                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3475                         continue;
3476
3477                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3478                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3479                         continue;
3480
3481                 if (!selected || top_rssi < bss->rssi) {
3482                         selected = bss;
3483                         top_rssi = bss->rssi;
3484                 }
3485         }
3486         if (selected)
3487                 atomic_inc(&selected->users);
3488         spin_unlock_bh(&local->sta_bss_lock);
3489
3490         if (selected) {
3491                 ieee80211_set_freq(dev, selected->freq);
3492                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3493                         ieee80211_sta_set_ssid(dev, selected->ssid,
3494                                                selected->ssid_len);
3495                 ieee80211_sta_set_bssid(dev, selected->bssid);
3496                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3497                 ieee80211_rx_bss_put(dev, selected);
3498                 ifsta->state = IEEE80211_AUTHENTICATE;
3499                 ieee80211_sta_reset_auth(dev, ifsta);
3500                 return 0;
3501         } else {
3502                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3503                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3504                                 ieee80211_sta_start_scan(dev, NULL, 0);
3505                         else
3506                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3507                                                          ifsta->ssid_len);
3508                         ifsta->state = IEEE80211_AUTHENTICATE;
3509                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3510                 } else
3511                         ifsta->state = IEEE80211_DISABLED;
3512         }
3513         return -1;
3514 }
3515
3516
3517 static int ieee80211_sta_create_ibss(struct net_device *dev,
3518                                      struct ieee80211_if_sta *ifsta)
3519 {
3520         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3521         struct ieee80211_sta_bss *bss;
3522         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3523         struct ieee80211_supported_band *sband;
3524         u8 bssid[ETH_ALEN], *pos;
3525         int i;
3526         int ret;
3527         DECLARE_MAC_BUF(mac);
3528
3529 #if 0
3530         /* Easier testing, use fixed BSSID. */
3531         memset(bssid, 0xfe, ETH_ALEN);
3532 #else
3533         /* Generate random, not broadcast, locally administered BSSID. Mix in
3534          * own MAC address to make sure that devices that do not have proper
3535          * random number generator get different BSSID. */
3536         get_random_bytes(bssid, ETH_ALEN);
3537         for (i = 0; i < ETH_ALEN; i++)
3538                 bssid[i] ^= dev->dev_addr[i];
3539         bssid[0] &= ~0x01;
3540         bssid[0] |= 0x02;
3541 #endif
3542
3543         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3544                dev->name, print_mac(mac, bssid));
3545
3546         bss = ieee80211_rx_bss_add(dev, bssid,
3547                                    local->hw.conf.channel->center_freq,
3548                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3549         if (!bss)
3550                 return -ENOMEM;
3551
3552         bss->band = local->hw.conf.channel->band;
3553         sband = local->hw.wiphy->bands[bss->band];
3554
3555         if (local->hw.conf.beacon_int == 0)
3556                 local->hw.conf.beacon_int = 10000;
3557         bss->beacon_int = local->hw.conf.beacon_int;
3558         bss->last_update = jiffies;
3559         bss->capability = WLAN_CAPABILITY_IBSS;
3560         if (sdata->default_key) {
3561                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3562         } else
3563                 sdata->drop_unencrypted = 0;
3564         bss->supp_rates_len = sband->n_bitrates;
3565         pos = bss->supp_rates;
3566         for (i = 0; i < sband->n_bitrates; i++) {
3567                 int rate = sband->bitrates[i].bitrate;
3568                 *pos++ = (u8) (rate / 5);
3569         }
3570
3571         ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3572         ieee80211_rx_bss_put(dev, bss);
3573         return ret;
3574 }
3575
3576
3577 static int ieee80211_sta_find_ibss(struct net_device *dev,
3578                                    struct ieee80211_if_sta *ifsta)
3579 {
3580         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3581         struct ieee80211_sta_bss *bss;
3582         int found = 0;
3583         u8 bssid[ETH_ALEN];
3584         int active_ibss;
3585         DECLARE_MAC_BUF(mac);
3586         DECLARE_MAC_BUF(mac2);
3587
3588         if (ifsta->ssid_len == 0)
3589                 return -EINVAL;
3590
3591         active_ibss = ieee80211_sta_active_ibss(dev);
3592 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3593         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3594                dev->name, active_ibss);
3595 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3596         spin_lock_bh(&local->sta_bss_lock);
3597         list_for_each_entry(bss, &local->sta_bss_list, list) {
3598                 if (ifsta->ssid_len != bss->ssid_len ||
3599                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3600                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3601                         continue;
3602 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3603                 printk(KERN_DEBUG "   bssid=%s found\n",
3604                        print_mac(mac, bss->bssid));
3605 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3606                 memcpy(bssid, bss->bssid, ETH_ALEN);
3607                 found = 1;
3608                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3609                         break;
3610         }
3611         spin_unlock_bh(&local->sta_bss_lock);
3612
3613 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3614         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3615                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3616 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3617         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3618             (bss = ieee80211_rx_bss_get(dev, bssid,
3619                                         local->hw.conf.channel->center_freq,
3620                                         ifsta->ssid, ifsta->ssid_len))) {
3621                 int ret;
3622                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3623                        " based on configured SSID\n",
3624                        dev->name, print_mac(mac, bssid));
3625                 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3626                 ieee80211_rx_bss_put(dev, bss);
3627                 return ret;
3628         }
3629 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3630         printk(KERN_DEBUG "   did not try to join ibss\n");
3631 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3632
3633         /* Selected IBSS not found in current scan results - try to scan */
3634         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3635             !ieee80211_sta_active_ibss(dev)) {
3636                 mod_timer(&ifsta->timer, jiffies +
3637                                       IEEE80211_IBSS_MERGE_INTERVAL);
3638         } else if (time_after(jiffies, local->last_scan_completed +
3639                               IEEE80211_SCAN_INTERVAL)) {
3640                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3641                        "join\n", dev->name);
3642                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3643                                               ifsta->ssid_len);
3644         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3645                 int interval = IEEE80211_SCAN_INTERVAL;
3646
3647                 if (time_after(jiffies, ifsta->ibss_join_req +
3648                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3649                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3650                             (!(local->oper_channel->flags &
3651                                         IEEE80211_CHAN_NO_IBSS)))
3652                                 return ieee80211_sta_create_ibss(dev, ifsta);
3653                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3654                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3655                                        " %d MHz\n", dev->name,
3656                                        local->hw.conf.channel->center_freq);
3657                         }
3658
3659                         /* No IBSS found - decrease scan interval and continue
3660                          * scanning. */
3661                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3662                 }
3663
3664                 ifsta->state = IEEE80211_IBSS_SEARCH;
3665                 mod_timer(&ifsta->timer, jiffies + interval);
3666                 return 0;
3667         }
3668
3669         return 0;
3670 }
3671
3672
3673 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3674 {
3675         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3676         struct ieee80211_if_sta *ifsta;
3677
3678         if (len > IEEE80211_MAX_SSID_LEN)
3679                 return -EINVAL;
3680
3681         ifsta = &sdata->u.sta;
3682
3683         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3684                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3685         memcpy(ifsta->ssid, ssid, len);
3686         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3687         ifsta->ssid_len = len;
3688
3689         if (len)
3690                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3691         else
3692                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3693         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3694             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3695                 ifsta->ibss_join_req = jiffies;
3696                 ifsta->state = IEEE80211_IBSS_SEARCH;
3697                 return ieee80211_sta_find_ibss(dev, ifsta);
3698         }
3699         return 0;
3700 }
3701
3702
3703 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3704 {
3705         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3706         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3707         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3708         *len = ifsta->ssid_len;
3709         return 0;
3710 }
3711
3712
3713 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3714 {
3715         struct ieee80211_sub_if_data *sdata;
3716         struct ieee80211_if_sta *ifsta;
3717         int res;
3718
3719         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3720         ifsta = &sdata->u.sta;
3721
3722         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3723                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3724                 res = ieee80211_if_config(dev);
3725                 if (res) {
3726                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3727                                "the low-level driver\n", dev->name);
3728                         return res;
3729                 }
3730         }
3731
3732         if (is_valid_ether_addr(bssid))
3733                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3734         else
3735                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3736
3737         return 0;
3738 }
3739
3740
3741 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3742                                     struct ieee80211_sub_if_data *sdata,
3743                                     int powersave)
3744 {
3745         struct sk_buff *skb;
3746         struct ieee80211_hdr *nullfunc;
3747         u16 fc;
3748
3749         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3750         if (!skb) {
3751                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3752                        "frame\n", sdata->dev->name);
3753                 return;
3754         }
3755         skb_reserve(skb, local->hw.extra_tx_headroom);
3756
3757         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3758         memset(nullfunc, 0, 24);
3759         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3760              IEEE80211_FCTL_TODS;
3761         if (powersave)
3762                 fc |= IEEE80211_FCTL_PM;
3763         nullfunc->frame_control = cpu_to_le16(fc);
3764         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3765         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3766         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3767
3768         ieee80211_sta_tx(sdata->dev, skb, 0);
3769 }
3770
3771
3772 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3773 {
3774         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3775             ieee80211_vif_is_mesh(&sdata->vif))
3776                 ieee80211_sta_timer((unsigned long)sdata);
3777 }
3778
3779 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3780 {
3781         struct ieee80211_local *local = hw_to_local(hw);
3782         struct net_device *dev = local->scan_dev;
3783         struct ieee80211_sub_if_data *sdata;
3784         union iwreq_data wrqu;
3785
3786         local->last_scan_completed = jiffies;
3787         memset(&wrqu, 0, sizeof(wrqu));
3788         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3789
3790         if (local->sta_hw_scanning) {
3791                 local->sta_hw_scanning = 0;
3792                 if (ieee80211_hw_config(local))
3793                         printk(KERN_DEBUG "%s: failed to restore operational "
3794                                "channel after scan\n", dev->name);
3795                 /* Restart STA timer for HW scan case */
3796                 rcu_read_lock();
3797                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3798                         ieee80211_restart_sta_timer(sdata);
3799                 rcu_read_unlock();
3800
3801                 goto done;
3802         }
3803
3804         local->sta_sw_scanning = 0;
3805         if (ieee80211_hw_config(local))
3806                 printk(KERN_DEBUG "%s: failed to restore operational "
3807                        "channel after scan\n", dev->name);
3808
3809
3810         netif_tx_lock_bh(local->mdev);
3811         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3812         local->ops->configure_filter(local_to_hw(local),
3813                                      FIF_BCN_PRBRESP_PROMISC,
3814                                      &local->filter_flags,
3815                                      local->mdev->mc_count,
3816                                      local->mdev->mc_list);
3817
3818         netif_tx_unlock_bh(local->mdev);
3819
3820         rcu_read_lock();
3821         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3822
3823                 /* No need to wake the master device. */
3824                 if (sdata->dev == local->mdev)
3825                         continue;
3826
3827                 /* Tell AP we're back */
3828                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3829                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3830                         ieee80211_send_nullfunc(local, sdata, 0);
3831
3832                 ieee80211_restart_sta_timer(sdata);
3833
3834                 netif_wake_queue(sdata->dev);
3835         }
3836         rcu_read_unlock();
3837
3838 done:
3839         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3840         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3841                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3842                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3843                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3844                     !ieee80211_sta_active_ibss(dev)))
3845                         ieee80211_sta_find_ibss(dev, ifsta);
3846         }
3847 }
3848 EXPORT_SYMBOL(ieee80211_scan_completed);
3849
3850 void ieee80211_sta_scan_work(struct work_struct *work)
3851 {
3852         struct ieee80211_local *local =
3853                 container_of(work, struct ieee80211_local, scan_work.work);
3854         struct net_device *dev = local->scan_dev;
3855         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3856         struct ieee80211_supported_band *sband;
3857         struct ieee80211_channel *chan;
3858         int skip;
3859         unsigned long next_delay = 0;
3860
3861         if (!local->sta_sw_scanning)
3862                 return;
3863
3864         switch (local->scan_state) {
3865         case SCAN_SET_CHANNEL:
3866                 /*
3867                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3868                  * after we successfully scanned the last channel of the last
3869                  * band (and the last band is supported by the hw)
3870                  */
3871                 if (local->scan_band < IEEE80211_NUM_BANDS)
3872                         sband = local->hw.wiphy->bands[local->scan_band];
3873                 else
3874                         sband = NULL;
3875
3876                 /*
3877                  * If we are at an unsupported band and have more bands
3878                  * left to scan, advance to the next supported one.
3879                  */
3880                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3881                         local->scan_band++;
3882                         sband = local->hw.wiphy->bands[local->scan_band];
3883                         local->scan_channel_idx = 0;
3884                 }
3885
3886                 /* if no more bands/channels left, complete scan */
3887                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3888                         ieee80211_scan_completed(local_to_hw(local));
3889                         return;
3890                 }
3891                 skip = 0;
3892                 chan = &sband->channels[local->scan_channel_idx];
3893
3894                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3895                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3896                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3897                         skip = 1;
3898
3899                 if (!skip) {
3900                         local->scan_channel = chan;
3901                         if (ieee80211_hw_config(local)) {
3902                                 printk(KERN_DEBUG "%s: failed to set freq to "
3903                                        "%d MHz for scan\n", dev->name,
3904                                        chan->center_freq);
3905                                 skip = 1;
3906                         }
3907                 }
3908
3909                 /* advance state machine to next channel/band */
3910                 local->scan_channel_idx++;
3911                 if (local->scan_channel_idx >= sband->n_channels) {
3912                         /*
3913                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3914                          * we'll catch that case above and complete the scan
3915                          * if that is the case.
3916                          */
3917                         local->scan_band++;
3918                         local->scan_channel_idx = 0;
3919                 }
3920
3921                 if (skip)
3922                         break;
3923
3924                 next_delay = IEEE80211_PROBE_DELAY +
3925                              usecs_to_jiffies(local->hw.channel_change_time);
3926                 local->scan_state = SCAN_SEND_PROBE;
3927                 break;
3928         case SCAN_SEND_PROBE:
3929                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3930                 local->scan_state = SCAN_SET_CHANNEL;
3931
3932                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3933                         break;
3934                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3935                                          local->scan_ssid_len);
3936                 next_delay = IEEE80211_CHANNEL_TIME;
3937                 break;
3938         }
3939
3940         if (local->sta_sw_scanning)
3941                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3942                                    next_delay);
3943 }
3944
3945
3946 static int ieee80211_sta_start_scan(struct net_device *dev,
3947                                     u8 *ssid, size_t ssid_len)
3948 {
3949         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3950         struct ieee80211_sub_if_data *sdata;
3951
3952         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3953                 return -EINVAL;
3954
3955         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3956          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3957          * BSSID: MACAddress
3958          * SSID
3959          * ScanType: ACTIVE, PASSIVE
3960          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3961          *    a Probe frame during active scanning
3962          * ChannelList
3963          * MinChannelTime (>= ProbeDelay), in TU
3964          * MaxChannelTime: (>= MinChannelTime), in TU
3965          */
3966
3967          /* MLME-SCAN.confirm
3968           * BSSDescriptionSet
3969           * ResultCode: SUCCESS, INVALID_PARAMETERS
3970          */
3971
3972         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3973                 if (local->scan_dev == dev)
3974                         return 0;
3975                 return -EBUSY;
3976         }
3977
3978         if (local->ops->hw_scan) {
3979                 int rc = local->ops->hw_scan(local_to_hw(local),
3980                                              ssid, ssid_len);
3981                 if (!rc) {
3982                         local->sta_hw_scanning = 1;
3983                         local->scan_dev = dev;
3984                 }
3985                 return rc;
3986         }
3987
3988         local->sta_sw_scanning = 1;
3989
3990         rcu_read_lock();
3991         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3992
3993                 /* Don't stop the master interface, otherwise we can't transmit
3994                  * probes! */
3995                 if (sdata->dev == local->mdev)
3996                         continue;
3997
3998                 netif_stop_queue(sdata->dev);
3999                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4000                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4001                         ieee80211_send_nullfunc(local, sdata, 1);
4002         }
4003         rcu_read_unlock();
4004
4005         if (ssid) {
4006                 local->scan_ssid_len = ssid_len;
4007                 memcpy(local->scan_ssid, ssid, ssid_len);
4008         } else
4009                 local->scan_ssid_len = 0;
4010         local->scan_state = SCAN_SET_CHANNEL;
4011         local->scan_channel_idx = 0;
4012         local->scan_band = IEEE80211_BAND_2GHZ;
4013         local->scan_dev = dev;
4014
4015         netif_tx_lock_bh(local->mdev);
4016         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4017         local->ops->configure_filter(local_to_hw(local),
4018                                      FIF_BCN_PRBRESP_PROMISC,
4019                                      &local->filter_flags,
4020                                      local->mdev->mc_count,
4021                                      local->mdev->mc_list);
4022         netif_tx_unlock_bh(local->mdev);
4023
4024         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4025         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4026                            IEEE80211_CHANNEL_TIME);
4027
4028         return 0;
4029 }
4030
4031
4032 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4033 {
4034         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4035         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4036         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4037
4038         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4039                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4040
4041         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4042                 if (local->scan_dev == dev)
4043                         return 0;
4044                 return -EBUSY;
4045         }
4046
4047         ifsta->scan_ssid_len = ssid_len;
4048         if (ssid_len)
4049                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4050         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4051         queue_work(local->hw.workqueue, &ifsta->work);
4052         return 0;
4053 }
4054
4055 static char *
4056 ieee80211_sta_scan_result(struct net_device *dev,
4057                           struct ieee80211_sta_bss *bss,
4058                           char *current_ev, char *end_buf)
4059 {
4060         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4061         struct iw_event iwe;
4062
4063         if (time_after(jiffies,
4064                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4065                 return current_ev;
4066
4067         memset(&iwe, 0, sizeof(iwe));
4068         iwe.cmd = SIOCGIWAP;
4069         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4070         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4071         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4072                                           IW_EV_ADDR_LEN);
4073
4074         memset(&iwe, 0, sizeof(iwe));
4075         iwe.cmd = SIOCGIWESSID;
4076         if (bss_mesh_cfg(bss)) {
4077                 iwe.u.data.length = bss_mesh_id_len(bss);
4078                 iwe.u.data.flags = 1;
4079                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4080                                                   bss_mesh_id(bss));
4081         } else {
4082                 iwe.u.data.length = bss->ssid_len;
4083                 iwe.u.data.flags = 1;
4084                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4085                                                   bss->ssid);
4086         }
4087
4088         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4089             || bss_mesh_cfg(bss)) {
4090                 memset(&iwe, 0, sizeof(iwe));
4091                 iwe.cmd = SIOCGIWMODE;
4092                 if (bss_mesh_cfg(bss))
4093                         iwe.u.mode = IW_MODE_MESH;
4094                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4095                         iwe.u.mode = IW_MODE_MASTER;
4096                 else
4097                         iwe.u.mode = IW_MODE_ADHOC;
4098                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4099                                                   IW_EV_UINT_LEN);
4100         }
4101
4102         memset(&iwe, 0, sizeof(iwe));
4103         iwe.cmd = SIOCGIWFREQ;
4104         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4105         iwe.u.freq.e = 0;
4106         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4107                                           IW_EV_FREQ_LEN);
4108
4109         memset(&iwe, 0, sizeof(iwe));
4110         iwe.cmd = SIOCGIWFREQ;
4111         iwe.u.freq.m = bss->freq;
4112         iwe.u.freq.e = 6;
4113         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4114                                           IW_EV_FREQ_LEN);
4115         memset(&iwe, 0, sizeof(iwe));
4116         iwe.cmd = IWEVQUAL;
4117         iwe.u.qual.qual = bss->signal;
4118         iwe.u.qual.level = bss->rssi;
4119         iwe.u.qual.noise = bss->noise;
4120         iwe.u.qual.updated = local->wstats_flags;
4121         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4122                                           IW_EV_QUAL_LEN);
4123
4124         memset(&iwe, 0, sizeof(iwe));
4125         iwe.cmd = SIOCGIWENCODE;
4126         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4127                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4128         else
4129                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4130         iwe.u.data.length = 0;
4131         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4132
4133         if (bss && bss->wpa_ie) {
4134                 memset(&iwe, 0, sizeof(iwe));
4135                 iwe.cmd = IWEVGENIE;
4136                 iwe.u.data.length = bss->wpa_ie_len;
4137                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4138                                                   bss->wpa_ie);
4139         }
4140
4141         if (bss && bss->rsn_ie) {
4142                 memset(&iwe, 0, sizeof(iwe));
4143                 iwe.cmd = IWEVGENIE;
4144                 iwe.u.data.length = bss->rsn_ie_len;
4145                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4146                                                   bss->rsn_ie);
4147         }
4148
4149         if (bss && bss->supp_rates_len > 0) {
4150                 /* display all supported rates in readable format */
4151                 char *p = current_ev + IW_EV_LCP_LEN;
4152                 int i;
4153
4154                 memset(&iwe, 0, sizeof(iwe));
4155                 iwe.cmd = SIOCGIWRATE;
4156                 /* Those two flags are ignored... */
4157                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4158
4159                 for (i = 0; i < bss->supp_rates_len; i++) {
4160                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4161                                                         0x7f) * 500000);
4162                         p = iwe_stream_add_value(current_ev, p,
4163                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4164                 }
4165                 current_ev = p;
4166         }
4167
4168         if (bss) {
4169                 char *buf;
4170                 buf = kmalloc(30, GFP_ATOMIC);
4171                 if (buf) {
4172                         memset(&iwe, 0, sizeof(iwe));
4173                         iwe.cmd = IWEVCUSTOM;
4174                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4175                         iwe.u.data.length = strlen(buf);
4176                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4177                                                           &iwe, buf);
4178                         kfree(buf);
4179                 }
4180         }
4181
4182         if (bss_mesh_cfg(bss)) {
4183                 char *buf;
4184                 u8 *cfg = bss_mesh_cfg(bss);
4185                 buf = kmalloc(50, GFP_ATOMIC);
4186                 if (buf) {
4187                         memset(&iwe, 0, sizeof(iwe));
4188                         iwe.cmd = IWEVCUSTOM;
4189                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4190                         iwe.u.data.length = strlen(buf);
4191                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4192                                                           &iwe, buf);
4193                         sprintf(buf, "Path Selection Protocol ID: "
4194                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4195                                                         cfg[4]);
4196                         iwe.u.data.length = strlen(buf);
4197                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4198                                                           &iwe, buf);
4199                         sprintf(buf, "Path Selection Metric ID: "
4200                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4201                                                         cfg[8]);
4202                         iwe.u.data.length = strlen(buf);
4203                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4204                                                           &iwe, buf);
4205                         sprintf(buf, "Congestion Control Mode ID: "
4206                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4207                                                         cfg[11], cfg[12]);
4208                         iwe.u.data.length = strlen(buf);
4209                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4210                                                           &iwe, buf);
4211                         sprintf(buf, "Channel Precedence: "
4212                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4213                                                         cfg[15], cfg[16]);
4214                         iwe.u.data.length = strlen(buf);
4215                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4216                                                           &iwe, buf);
4217                         kfree(buf);
4218                 }
4219         }
4220
4221         return current_ev;
4222 }
4223
4224
4225 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4226 {
4227         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4228         char *current_ev = buf;
4229         char *end_buf = buf + len;
4230         struct ieee80211_sta_bss *bss;
4231
4232         spin_lock_bh(&local->sta_bss_lock);
4233         list_for_each_entry(bss, &local->sta_bss_list, list) {
4234                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4235                         spin_unlock_bh(&local->sta_bss_lock);
4236                         return -E2BIG;
4237                 }
4238                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4239                                                        end_buf);
4240         }
4241         spin_unlock_bh(&local->sta_bss_lock);
4242         return current_ev - buf;
4243 }
4244
4245
4246 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4247 {
4248         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4249         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4250         kfree(ifsta->extra_ie);
4251         if (len == 0) {
4252                 ifsta->extra_ie = NULL;
4253                 ifsta->extra_ie_len = 0;
4254                 return 0;
4255         }
4256         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4257         if (!ifsta->extra_ie) {
4258                 ifsta->extra_ie_len = 0;
4259                 return -ENOMEM;
4260         }
4261         memcpy(ifsta->extra_ie, ie, len);
4262         ifsta->extra_ie_len = len;
4263         return 0;
4264 }
4265
4266
4267 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4268                                          struct sk_buff *skb, u8 *bssid,
4269                                          u8 *addr)
4270 {
4271         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4272         struct sta_info *sta;
4273         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4274         DECLARE_MAC_BUF(mac);
4275
4276         /* TODO: Could consider removing the least recently used entry and
4277          * allow new one to be added. */
4278         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4279                 if (net_ratelimit()) {
4280                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4281                                "entry %s\n", dev->name, print_mac(mac, addr));
4282                 }
4283                 return NULL;
4284         }
4285
4286         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4287                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4288
4289         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4290         if (!sta)
4291                 return NULL;
4292
4293         sta->flags |= WLAN_STA_AUTHORIZED;
4294
4295         sta->supp_rates[local->hw.conf.channel->band] =
4296                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4297
4298         rate_control_rate_init(sta, local);
4299
4300         if (sta_info_insert(sta))
4301                 return NULL;
4302
4303         return sta;
4304 }
4305
4306
4307 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4308 {
4309         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4310         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4311
4312         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4313                dev->name, reason);
4314
4315         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4316             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4317                 return -EINVAL;
4318
4319         ieee80211_send_deauth(dev, ifsta, reason);
4320         ieee80211_set_disassoc(dev, ifsta, 1);
4321         return 0;
4322 }
4323
4324
4325 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4326 {
4327         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4328         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4329
4330         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4331                dev->name, reason);
4332
4333         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4334                 return -EINVAL;
4335
4336         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4337                 return -1;
4338
4339         ieee80211_send_disassoc(dev, ifsta, reason);
4340         ieee80211_set_disassoc(dev, ifsta, 0);
4341         return 0;
4342 }
4343
4344 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4345                           enum ieee80211_notification_types  notif_type)
4346 {
4347         struct ieee80211_local *local = hw_to_local(hw);
4348         struct ieee80211_sub_if_data *sdata;
4349
4350         switch (notif_type) {
4351         case IEEE80211_NOTIFY_RE_ASSOC:
4352                 rcu_read_lock();
4353                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4354
4355                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4356                                 ieee80211_sta_req_auth(sdata->dev,
4357                                                        &sdata->u.sta);
4358                         }
4359
4360                 }
4361                 rcu_read_unlock();
4362                 break;
4363         }
4364 }
4365 EXPORT_SYMBOL(ieee80211_notify_mac);