SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "rate.h"
  34 #include "led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 /* mgmt header + 1 byte action code */
  63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  64
  65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  70
  71 /* next values represent the buffer size for A-MPDU frame.
  72  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  73 #define IEEE80211_MIN_AMPDU_BUF 0x8
  74 #define IEEE80211_MAX_AMPDU_BUF 0x40
  75
  76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  77                                      u8 *ssid, size_t ssid_len);
  78 static struct ieee80211_sta_bss *
  79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  80                      u8 *ssid, u8 ssid_len);
  81 static void ieee80211_rx_bss_put(struct net_device *dev,
  82                                  struct ieee80211_sta_bss *bss);
  83 static int ieee80211_sta_find_ibss(struct net_device *dev,
  84                                    struct ieee80211_if_sta *ifsta);
  85 static int ieee80211_sta_wep_configured(struct net_device *dev);
  86 static int ieee80211_sta_start_scan(struct net_device *dev,
  87                                     u8 *ssid, size_t ssid_len);
  88 static int ieee80211_sta_config_auth(struct net_device *dev,
  89                                      struct ieee80211_if_sta *ifsta);
  90 static void sta_rx_agg_session_timer_expired(unsigned long data);
  91
  92
  93 void ieee802_11_parse_elems(u8 *start, size_t len,
  94                             struct ieee802_11_elems *elems)
  95 {
  96         size_t left = len;
  97         u8 *pos = start;
  98
  99         memset(elems, 0, sizeof(*elems));
 100
 101         while (left >= 2) {
 102                 u8 id, elen;
 103
 104                 id = *pos++;
 105                 elen = *pos++;
 106                 left -= 2;
 107
 108                 if (elen > left)
 109                         return;
 110
 111                 switch (id) {
 112                 case WLAN_EID_SSID:
 113                         elems->ssid = pos;
 114                         elems->ssid_len = elen;
 115                         break;
 116                 case WLAN_EID_SUPP_RATES:
 117                         elems->supp_rates = pos;
 118                         elems->supp_rates_len = elen;
 119                         break;
 120                 case WLAN_EID_FH_PARAMS:
 121                         elems->fh_params = pos;
 122                         elems->fh_params_len = elen;
 123                         break;
 124                 case WLAN_EID_DS_PARAMS:
 125                         elems->ds_params = pos;
 126                         elems->ds_params_len = elen;
 127                         break;
 128                 case WLAN_EID_CF_PARAMS:
 129                         elems->cf_params = pos;
 130                         elems->cf_params_len = elen;
 131                         break;
 132                 case WLAN_EID_TIM:
 133                         elems->tim = pos;
 134                         elems->tim_len = elen;
 135                         break;
 136                 case WLAN_EID_IBSS_PARAMS:
 137                         elems->ibss_params = pos;
 138                         elems->ibss_params_len = elen;
 139                         break;
 140                 case WLAN_EID_CHALLENGE:
 141                         elems->challenge = pos;
 142                         elems->challenge_len = elen;
 143                         break;
 144                 case WLAN_EID_WPA:
 145                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 146                             pos[2] == 0xf2) {
 147                                 /* Microsoft OUI (00:50:F2) */
 148                                 if (pos[3] == 1) {
 149                                         /* OUI Type 1 - WPA IE */
 150                                         elems->wpa = pos;
 151                                         elems->wpa_len = elen;
 152                                 } else if (elen >= 5 && pos[3] == 2) {
 153                                         if (pos[4] == 0) {
 154                                                 elems->wmm_info = pos;
 155                                                 elems->wmm_info_len = elen;
 156                                         } else if (pos[4] == 1) {
 157                                                 elems->wmm_param = pos;
 158                                                 elems->wmm_param_len = elen;
 159                                         }
 160                                 }
 161                         }
 162                         break;
 163                 case WLAN_EID_RSN:
 164                         elems->rsn = pos;
 165                         elems->rsn_len = elen;
 166                         break;
 167                 case WLAN_EID_ERP_INFO:
 168                         elems->erp_info = pos;
 169                         elems->erp_info_len = elen;
 170                         break;
 171                 case WLAN_EID_EXT_SUPP_RATES:
 172                         elems->ext_supp_rates = pos;
 173                         elems->ext_supp_rates_len = elen;
 174                         break;
 175                 case WLAN_EID_HT_CAPABILITY:
 176                         elems->ht_cap_elem = pos;
 177                         elems->ht_cap_elem_len = elen;
 178                         break;
 179                 case WLAN_EID_HT_EXTRA_INFO:
 180                         elems->ht_info_elem = pos;
 181                         elems->ht_info_elem_len = elen;
 182                         break;
 183                 case WLAN_EID_MESH_ID:
 184                         elems->mesh_id = pos;
 185                         elems->mesh_id_len = elen;
 186                         break;
 187                 case WLAN_EID_MESH_CONFIG:
 188                         elems->mesh_config = pos;
 189                         elems->mesh_config_len = elen;
 190                         break;
 191                 case WLAN_EID_PEER_LINK:
 192                         elems->peer_link = pos;
 193                         elems->peer_link_len = elen;
 194                         break;
 195                 case WLAN_EID_PREQ:
 196                         elems->preq = pos;
 197                         elems->preq_len = elen;
 198                         break;
 199                 case WLAN_EID_PREP:
 200                         elems->prep = pos;
 201                         elems->prep_len = elen;
 202                         break;
 203                 case WLAN_EID_PERR:
 204                         elems->perr = pos;
 205                         elems->perr_len = elen;
 206                         break;
 207                 default:
 208                         break;
 209                 }
 210
 211                 left -= elen;
 212                 pos += elen;
 213         }
 214 }
 215
 216
 217 static int ecw2cw(int ecw)
 218 {
 219         return (1 << ecw) - 1;
 220 }
 221
 222
 223 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 224                                          struct ieee80211_sta_bss *bss,
 225                                          int ibss)
 226 {
 227         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 228         struct ieee80211_local *local = sdata->local;
 229         int i, have_higher_than_11mbit = 0;
 230
 231
 232         /* cf. IEEE 802.11 9.2.12 */
 233         for (i = 0; i < bss->supp_rates_len; i++)
 234                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 235                         have_higher_than_11mbit = 1;
 236
 237         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 238             have_higher_than_11mbit)
 239                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 240         else
 241                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 242
 243
 244         if (local->ops->conf_tx) {
 245                 struct ieee80211_tx_queue_params qparam;
 246
 247                 memset(&qparam, 0, sizeof(qparam));
 248
 249                 qparam.aifs = 2;
 250
 251                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 252                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 253                         qparam.cw_min = 31;
 254                 else
 255                         qparam.cw_min = 15;
 256
 257                 qparam.cw_max = 1023;
 258                 qparam.txop = 0;
 259
 260                 for (i = 0; i < local_to_hw(local)->queues; i++)
 261                         local->ops->conf_tx(local_to_hw(local), i, &qparam);
 262         }
 263 }
 264
 265 static void ieee80211_sta_wmm_params(struct net_device *dev,
 266                                      struct ieee80211_if_sta *ifsta,
 267                                      u8 *wmm_param, size_t wmm_param_len)
 268 {
 269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 270         struct ieee80211_tx_queue_params params;
 271         size_t left;
 272         int count;
 273         u8 *pos;
 274
 275         if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
 276                 return;
 277
 278         if (!wmm_param)
 279                 return;
 280
 281         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 282                 return;
 283         count = wmm_param[6] & 0x0f;
 284         if (count == ifsta->wmm_last_param_set)
 285                 return;
 286         ifsta->wmm_last_param_set = count;
 287
 288         pos = wmm_param + 8;
 289         left = wmm_param_len - 8;
 290
 291         memset(&params, 0, sizeof(params));
 292
 293         if (!local->ops->conf_tx)
 294                 return;
 295
 296         local->wmm_acm = 0;
 297         for (; left >= 4; left -= 4, pos += 4) {
 298                 int aci = (pos[0] >> 5) & 0x03;
 299                 int acm = (pos[0] >> 4) & 0x01;
 300                 int queue;
 301
 302                 switch (aci) {
 303                 case 1:
 304                         queue = 3;
 305                         if (acm)
 306                                 local->wmm_acm |= BIT(0) | BIT(3);
 307                         break;
 308                 case 2:
 309                         queue = 1;
 310                         if (acm)
 311                                 local->wmm_acm |= BIT(4) | BIT(5);
 312                         break;
 313                 case 3:
 314                         queue = 0;
 315                         if (acm)
 316                                 local->wmm_acm |= BIT(6) | BIT(7);
 317                         break;
 318                 case 0:
 319                 default:
 320                         queue = 2;
 321                         if (acm)
 322                                 local->wmm_acm |= BIT(1) | BIT(2);
 323                         break;
 324                 }
 325
 326                 params.aifs = pos[0] & 0x0f;
 327                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 328                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 329                 params.txop = pos[2] | (pos[3] << 8);
 330 #ifdef CONFIG_MAC80211_DEBUG
 331                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 332                        "cWmin=%d cWmax=%d txop=%d\n",
 333                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 334                        params.cw_max, params.txop);
 335 #endif
 336                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 337                  * AC for now) */
 338                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 339                         printk(KERN_DEBUG "%s: failed to set TX queue "
 340                                "parameters for queue %d\n", dev->name, queue);
 341                 }
 342         }
 343 }
 344
 345 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 346                                            bool use_protection,
 347                                            bool use_short_preamble)
 348 {
 349         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 350         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 351         DECLARE_MAC_BUF(mac);
 352         u32 changed = 0;
 353
 354         if (use_protection != bss_conf->use_cts_prot) {
 355                 if (net_ratelimit()) {
 356                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 357                                "%s)\n",
 358                                sdata->dev->name,
 359                                use_protection ? "enabled" : "disabled",
 360                                print_mac(mac, ifsta->bssid));
 361                 }
 362                 bss_conf->use_cts_prot = use_protection;
 363                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 364         }
 365
 366         if (use_short_preamble != bss_conf->use_short_preamble) {
 367                 if (net_ratelimit()) {
 368                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 369                                " (BSSID=%s)\n",
 370                                sdata->dev->name,
 371                                use_short_preamble ? "short" : "long",
 372                                print_mac(mac, ifsta->bssid));
 373                 }
 374                 bss_conf->use_short_preamble = use_short_preamble;
 375                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 376         }
 377
 378         return changed;
 379 }
 380
 381 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 382                                    u8 erp_value)
 383 {
 384         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 385         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 386
 387         return ieee80211_handle_protect_preamb(sdata,
 388                         use_protection, use_short_preamble);
 389 }
 390
 391 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 392                                            struct ieee80211_sta_bss *bss)
 393 {
 394         u32 changed = 0;
 395
 396         if (bss->has_erp_value)
 397                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 398         else {
 399                 u16 capab = bss->capability;
 400                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 401                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 402         }
 403
 404         return changed;
 405 }
 406
 407 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 408                                    struct ieee80211_ht_info *ht_info)
 409 {
 410
 411         if (ht_info == NULL)
 412                 return -EINVAL;
 413
 414         memset(ht_info, 0, sizeof(*ht_info));
 415
 416         if (ht_cap_ie) {
 417                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 418
 419                 ht_info->ht_supported = 1;
 420                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 421                 ht_info->ampdu_factor =
 422                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 423                 ht_info->ampdu_density =
 424                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 425                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 426         } else
 427                 ht_info->ht_supported = 0;
 428
 429         return 0;
 430 }
 431
 432 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 433                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 434                         struct ieee80211_ht_bss_info *bss_info)
 435 {
 436         if (bss_info == NULL)
 437                 return -EINVAL;
 438
 439         memset(bss_info, 0, sizeof(*bss_info));
 440
 441         if (ht_add_info_ie) {
 442                 u16 op_mode;
 443                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 444
 445                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 446                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 447                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 448         }
 449
 450         return 0;
 451 }
 452
 453 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 454                                          struct ieee80211_if_sta *ifsta)
 455 {
 456         char *buf;
 457         size_t len;
 458         int i;
 459         union iwreq_data wrqu;
 460
 461         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 462                 return;
 463
 464         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 465                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 466         if (!buf)
 467                 return;
 468
 469         len = sprintf(buf, "ASSOCINFO(");
 470         if (ifsta->assocreq_ies) {
 471                 len += sprintf(buf + len, "ReqIEs=");
 472                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 473                         len += sprintf(buf + len, "%02x",
 474                                        ifsta->assocreq_ies[i]);
 475                 }
 476         }
 477         if (ifsta->assocresp_ies) {
 478                 if (ifsta->assocreq_ies)
 479                         len += sprintf(buf + len, " ");
 480                 len += sprintf(buf + len, "RespIEs=");
 481                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 482                         len += sprintf(buf + len, "%02x",
 483                                        ifsta->assocresp_ies[i]);
 484                 }
 485         }
 486         len += sprintf(buf + len, ")");
 487
 488         if (len > IW_CUSTOM_MAX) {
 489                 len = sprintf(buf, "ASSOCRESPIE=");
 490                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 491                         len += sprintf(buf + len, "%02x",
 492                                        ifsta->assocresp_ies[i]);
 493                 }
 494         }
 495
 496         memset(&wrqu, 0, sizeof(wrqu));
 497         wrqu.data.length = len;
 498         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 499
 500         kfree(buf);
 501 }
 502
 503
 504 static void ieee80211_set_associated(struct net_device *dev,
 505                                      struct ieee80211_if_sta *ifsta,
 506                                      bool assoc)
 507 {
 508         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 509         struct ieee80211_local *local = sdata->local;
 510         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 511         union iwreq_data wrqu;
 512         u32 changed = BSS_CHANGED_ASSOC;
 513
 514         if (assoc) {
 515                 struct ieee80211_sta_bss *bss;
 516
 517                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 518
 519                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 520                         return;
 521
 522                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 523                                            conf->channel->center_freq,
 524                                            ifsta->ssid, ifsta->ssid_len);
 525                 if (bss) {
 526                         /* set timing information */
 527                         sdata->bss_conf.beacon_int = bss->beacon_int;
 528                         sdata->bss_conf.timestamp = bss->timestamp;
 529
 530                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 531
 532                         ieee80211_rx_bss_put(dev, bss);
 533                 }
 534
 535                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 536                         changed |= BSS_CHANGED_HT;
 537                         sdata->bss_conf.assoc_ht = 1;
 538                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 539                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 540                 }
 541
 542                 netif_carrier_on(dev);
 543                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 544                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 545                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 546                 ieee80211_sta_send_associnfo(dev, ifsta);
 547         } else {
 548                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 549                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 550                 netif_carrier_off(dev);
 551                 ieee80211_reset_erp_info(dev);
 552
 553                 sdata->bss_conf.assoc_ht = 0;
 554                 sdata->bss_conf.ht_conf = NULL;
 555                 sdata->bss_conf.ht_bss_conf = NULL;
 556
 557                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 558         }
 559         ifsta->last_probe = jiffies;
 560         ieee80211_led_assoc(local, assoc);
 561
 562         sdata->bss_conf.assoc = assoc;
 563         ieee80211_bss_info_change_notify(sdata, changed);
 564         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 565         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 566 }
 567
 568 static void ieee80211_set_disassoc(struct net_device *dev,
 569                                    struct ieee80211_if_sta *ifsta, int deauth)
 570 {
 571         if (deauth)
 572                 ifsta->auth_tries = 0;
 573         ifsta->assoc_tries = 0;
 574         ieee80211_set_associated(dev, ifsta, 0);
 575 }
 576
 577 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 578                       int encrypt)
 579 {
 580         struct ieee80211_sub_if_data *sdata;
 581         struct ieee80211_tx_info *info;
 582
 583         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 584         skb->dev = sdata->local->mdev;
 585         skb_set_mac_header(skb, 0);
 586         skb_set_network_header(skb, 0);
 587         skb_set_transport_header(skb, 0);
 588
 589         info = IEEE80211_SKB_CB(skb);
 590         memset(info, 0, sizeof(struct ieee80211_tx_info));
 591         info->control.ifindex = sdata->dev->ifindex;
 592         if (!encrypt)
 593                 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
 594
 595         dev_queue_xmit(skb);
 596 }
 597
 598
 599 static void ieee80211_send_auth(struct net_device *dev,
 600                                 struct ieee80211_if_sta *ifsta,
 601                                 int transaction, u8 *extra, size_t extra_len,
 602                                 int encrypt)
 603 {
 604         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 605         struct sk_buff *skb;
 606         struct ieee80211_mgmt *mgmt;
 607
 608         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 609                             sizeof(*mgmt) + 6 + extra_len);
 610         if (!skb) {
 611                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 612                        "frame\n", dev->name);
 613                 return;
 614         }
 615         skb_reserve(skb, local->hw.extra_tx_headroom);
 616
 617         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 618         memset(mgmt, 0, 24 + 6);
 619         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 620                                            IEEE80211_STYPE_AUTH);
 621         if (encrypt)
 622                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 623         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 624         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 625         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 626         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 627         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 628         ifsta->auth_transaction = transaction + 1;
 629         mgmt->u.auth.status_code = cpu_to_le16(0);
 630         if (extra)
 631                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 632
 633         ieee80211_sta_tx(dev, skb, encrypt);
 634 }
 635
 636
 637 static void ieee80211_authenticate(struct net_device *dev,
 638                                    struct ieee80211_if_sta *ifsta)
 639 {
 640         DECLARE_MAC_BUF(mac);
 641
 642         ifsta->auth_tries++;
 643         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 644                 printk(KERN_DEBUG "%s: authentication with AP %s"
 645                        " timed out\n",
 646                        dev->name, print_mac(mac, ifsta->bssid));
 647                 ifsta->state = IEEE80211_DISABLED;
 648                 return;
 649         }
 650
 651         ifsta->state = IEEE80211_AUTHENTICATE;
 652         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 653                dev->name, print_mac(mac, ifsta->bssid));
 654
 655         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 656
 657         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 658 }
 659
 660 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 661                                       struct ieee80211_supported_band *sband,
 662                                       u64 *rates)
 663 {
 664         int i, j, count;
 665         *rates = 0;
 666         count = 0;
 667         for (i = 0; i < bss->supp_rates_len; i++) {
 668                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 669
 670                 for (j = 0; j < sband->n_bitrates; j++)
 671                         if (sband->bitrates[j].bitrate == rate) {
 672                                 *rates |= BIT(j);
 673                                 count++;
 674                                 break;
 675                         }
 676         }
 677
 678         return count;
 679 }
 680
 681 static void ieee80211_send_assoc(struct net_device *dev,
 682                                  struct ieee80211_if_sta *ifsta)
 683 {
 684         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 685         struct sk_buff *skb;
 686         struct ieee80211_mgmt *mgmt;
 687         u8 *pos, *ies;
 688         int i, len, count, rates_len, supp_rates_len;
 689         u16 capab;
 690         struct ieee80211_sta_bss *bss;
 691         int wmm = 0;
 692         struct ieee80211_supported_band *sband;
 693         u64 rates = 0;
 694
 695         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 696                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 697                             ifsta->ssid_len);
 698         if (!skb) {
 699                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 700                        "frame\n", dev->name);
 701                 return;
 702         }
 703         skb_reserve(skb, local->hw.extra_tx_headroom);
 704
 705         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 706
 707         capab = ifsta->capab;
 708
 709         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 710                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 711                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 712                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 713                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 714         }
 715
 716         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 717                                    local->hw.conf.channel->center_freq,
 718                                    ifsta->ssid, ifsta->ssid_len);
 719         if (bss) {
 720                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 721                         capab |= WLAN_CAPABILITY_PRIVACY;
 722                 if (bss->wmm_ie)
 723                         wmm = 1;
 724                 ieee80211_rx_bss_put(dev, bss);
 725         }
 726
 727         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 728         memset(mgmt, 0, 24);
 729         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 730         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 731         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 732
 733         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 734                 skb_put(skb, 10);
 735                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 736                                                    IEEE80211_STYPE_REASSOC_REQ);
 737                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 738                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 739                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 740                        ETH_ALEN);
 741         } else {
 742                 skb_put(skb, 4);
 743                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 744                                                    IEEE80211_STYPE_ASSOC_REQ);
 745                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 746                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 747         }
 748
 749         /* SSID */
 750         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 751         *pos++ = WLAN_EID_SSID;
 752         *pos++ = ifsta->ssid_len;
 753         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 754
 755         /* all supported rates should be added here but some APs
 756          * (e.g. D-Link DAP 1353 in b-only mode) don't like that
 757          * Therefore only add rates the AP supports */
 758         rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 759         supp_rates_len = rates_len;
 760         if (supp_rates_len > 8)
 761                 supp_rates_len = 8;
 762
 763         len = sband->n_bitrates;
 764         pos = skb_put(skb, supp_rates_len + 2);
 765         *pos++ = WLAN_EID_SUPP_RATES;
 766         *pos++ = supp_rates_len;
 767
 768         count = 0;
 769         for (i = 0; i < sband->n_bitrates; i++) {
 770                 if (BIT(i) & rates) {
 771                         int rate = sband->bitrates[i].bitrate;
 772                         *pos++ = (u8) (rate / 5);
 773                         if (++count == 8)
 774                                 break;
 775                 }
 776         }
 777
 778         if (count == 8) {
 779                 pos = skb_put(skb, rates_len - count + 2);
 780                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 781                 *pos++ = rates_len - count;
 782
 783                 for (i++; i < sband->n_bitrates; i++) {
 784                         if (BIT(i) & rates) {
 785                                 int rate = sband->bitrates[i].bitrate;
 786                                 *pos++ = (u8) (rate / 5);
 787                         }
 788                 }
 789         }
 790
 791         if (ifsta->extra_ie) {
 792                 pos = skb_put(skb, ifsta->extra_ie_len);
 793                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 794         }
 795
 796         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 797                 pos = skb_put(skb, 9);
 798                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 799                 *pos++ = 7; /* len */
 800                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 801                 *pos++ = 0x50;
 802                 *pos++ = 0xf2;
 803                 *pos++ = 2; /* WME */
 804                 *pos++ = 0; /* WME info */
 805                 *pos++ = 1; /* WME ver */
 806                 *pos++ = 0;
 807         }
 808
 809         /* wmm support is a must to HT */
 810         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 811             sband->ht_info.ht_supported && bss->ht_add_ie) {
 812                 struct ieee80211_ht_addt_info *ht_add_info =
 813                         (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
 814                 u16 cap = sband->ht_info.cap;
 815                 __le16 tmp;
 816                 u32 flags = local->hw.conf.channel->flags;
 817
 818                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 819                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 820                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 821                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 822                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 823                         }
 824                         break;
 825                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 826                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 827                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 828                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 829                         }
 830                         break;
 831                 }
 832
 833                 tmp = cpu_to_le16(cap);
 834                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 835                 *pos++ = WLAN_EID_HT_CAPABILITY;
 836                 *pos++ = sizeof(struct ieee80211_ht_cap);
 837                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 838                 memcpy(pos, &tmp, sizeof(u16));
 839                 pos += sizeof(u16);
 840                 /* TODO: needs a define here for << 2 */
 841                 *pos++ = sband->ht_info.ampdu_factor |
 842                          (sband->ht_info.ampdu_density << 2);
 843                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 844         }
 845
 846         kfree(ifsta->assocreq_ies);
 847         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 848         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 849         if (ifsta->assocreq_ies)
 850                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 851
 852         ieee80211_sta_tx(dev, skb, 0);
 853 }
 854
 855
 856 static void ieee80211_send_deauth(struct net_device *dev,
 857                                   struct ieee80211_if_sta *ifsta, u16 reason)
 858 {
 859         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 860         struct sk_buff *skb;
 861         struct ieee80211_mgmt *mgmt;
 862
 863         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 864         if (!skb) {
 865                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 866                        "frame\n", dev->name);
 867                 return;
 868         }
 869         skb_reserve(skb, local->hw.extra_tx_headroom);
 870
 871         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 872         memset(mgmt, 0, 24);
 873         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 874         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 875         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 876         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 877                                            IEEE80211_STYPE_DEAUTH);
 878         skb_put(skb, 2);
 879         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 880
 881         ieee80211_sta_tx(dev, skb, 0);
 882 }
 883
 884
 885 static void ieee80211_send_disassoc(struct net_device *dev,
 886                                     struct ieee80211_if_sta *ifsta, u16 reason)
 887 {
 888         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 889         struct sk_buff *skb;
 890         struct ieee80211_mgmt *mgmt;
 891
 892         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 893         if (!skb) {
 894                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 895                        "frame\n", dev->name);
 896                 return;
 897         }
 898         skb_reserve(skb, local->hw.extra_tx_headroom);
 899
 900         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 901         memset(mgmt, 0, 24);
 902         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 903         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 904         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 905         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 906                                            IEEE80211_STYPE_DISASSOC);
 907         skb_put(skb, 2);
 908         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 909
 910         ieee80211_sta_tx(dev, skb, 0);
 911 }
 912
 913
 914 static int ieee80211_privacy_mismatch(struct net_device *dev,
 915                                       struct ieee80211_if_sta *ifsta)
 916 {
 917         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 918         struct ieee80211_sta_bss *bss;
 919         int bss_privacy;
 920         int wep_privacy;
 921         int privacy_invoked;
 922
 923         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 924                 return 0;
 925
 926         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 927                                    local->hw.conf.channel->center_freq,
 928                                    ifsta->ssid, ifsta->ssid_len);
 929         if (!bss)
 930                 return 0;
 931
 932         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 933         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 934         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 935
 936         ieee80211_rx_bss_put(dev, bss);
 937
 938         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 939                 return 0;
 940
 941         return 1;
 942 }
 943
 944
 945 static void ieee80211_associate(struct net_device *dev,
 946                                 struct ieee80211_if_sta *ifsta)
 947 {
 948         DECLARE_MAC_BUF(mac);
 949
 950         ifsta->assoc_tries++;
 951         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 952                 printk(KERN_DEBUG "%s: association with AP %s"
 953                        " timed out\n",
 954                        dev->name, print_mac(mac, ifsta->bssid));
 955                 ifsta->state = IEEE80211_DISABLED;
 956                 return;
 957         }
 958
 959         ifsta->state = IEEE80211_ASSOCIATE;
 960         printk(KERN_DEBUG "%s: associate with AP %s\n",
 961                dev->name, print_mac(mac, ifsta->bssid));
 962         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 963                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 964                        "mixed-cell disabled - abort association\n", dev->name);
 965                 ifsta->state = IEEE80211_DISABLED;
 966                 return;
 967         }
 968
 969         ieee80211_send_assoc(dev, ifsta);
 970
 971         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 972 }
 973
 974
 975 static void ieee80211_associated(struct net_device *dev,
 976                                  struct ieee80211_if_sta *ifsta)
 977 {
 978         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 979         struct sta_info *sta;
 980         int disassoc;
 981         DECLARE_MAC_BUF(mac);
 982
 983         /* TODO: start monitoring current AP signal quality and number of
 984          * missed beacons. Scan other channels every now and then and search
 985          * for better APs. */
 986         /* TODO: remove expired BSSes */
 987
 988         ifsta->state = IEEE80211_ASSOCIATED;
 989
 990         rcu_read_lock();
 991
 992         sta = sta_info_get(local, ifsta->bssid);
 993         if (!sta) {
 994                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 995                        dev->name, print_mac(mac, ifsta->bssid));
 996                 disassoc = 1;
 997         } else {
 998                 disassoc = 0;
 999                 if (time_after(jiffies,
1000                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1001                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1002                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1003                                        "current AP %s - assume out of "
1004                                        "range\n",
1005                                        dev->name, print_mac(mac, ifsta->bssid));
1006                                 disassoc = 1;
1007                                 sta_info_unlink(&sta);
1008                         } else
1009                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1010                                                          local->scan_ssid,
1011                                                          local->scan_ssid_len);
1012                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1013                 } else {
1014                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1015                         if (time_after(jiffies, ifsta->last_probe +
1016                                        IEEE80211_PROBE_INTERVAL)) {
1017                                 ifsta->last_probe = jiffies;
1018                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1019                                                          ifsta->ssid,
1020                                                          ifsta->ssid_len);
1021                         }
1022                 }
1023         }
1024
1025         rcu_read_unlock();
1026
1027         if (disassoc && sta)
1028                 sta_info_destroy(sta);
1029
1030         if (disassoc) {
1031                 ifsta->state = IEEE80211_DISABLED;
1032                 ieee80211_set_associated(dev, ifsta, 0);
1033         } else {
1034                 mod_timer(&ifsta->timer, jiffies +
1035                                       IEEE80211_MONITORING_INTERVAL);
1036         }
1037 }
1038
1039
1040 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1041                                      u8 *ssid, size_t ssid_len)
1042 {
1043         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1044         struct ieee80211_supported_band *sband;
1045         struct sk_buff *skb;
1046         struct ieee80211_mgmt *mgmt;
1047         u8 *pos, *supp_rates, *esupp_rates = NULL;
1048         int i;
1049
1050         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1051         if (!skb) {
1052                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1053                        "request\n", dev->name);
1054                 return;
1055         }
1056         skb_reserve(skb, local->hw.extra_tx_headroom);
1057
1058         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1059         memset(mgmt, 0, 24);
1060         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1061                                            IEEE80211_STYPE_PROBE_REQ);
1062         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1063         if (dst) {
1064                 memcpy(mgmt->da, dst, ETH_ALEN);
1065                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1066         } else {
1067                 memset(mgmt->da, 0xff, ETH_ALEN);
1068                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1069         }
1070         pos = skb_put(skb, 2 + ssid_len);
1071         *pos++ = WLAN_EID_SSID;
1072         *pos++ = ssid_len;
1073         memcpy(pos, ssid, ssid_len);
1074
1075         supp_rates = skb_put(skb, 2);
1076         supp_rates[0] = WLAN_EID_SUPP_RATES;
1077         supp_rates[1] = 0;
1078         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1079
1080         for (i = 0; i < sband->n_bitrates; i++) {
1081                 struct ieee80211_rate *rate = &sband->bitrates[i];
1082                 if (esupp_rates) {
1083                         pos = skb_put(skb, 1);
1084                         esupp_rates[1]++;
1085                 } else if (supp_rates[1] == 8) {
1086                         esupp_rates = skb_put(skb, 3);
1087                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1088                         esupp_rates[1] = 1;
1089                         pos = &esupp_rates[2];
1090                 } else {
1091                         pos = skb_put(skb, 1);
1092                         supp_rates[1]++;
1093                 }
1094                 *pos = rate->bitrate / 5;
1095         }
1096
1097         ieee80211_sta_tx(dev, skb, 0);
1098 }
1099
1100
1101 static int ieee80211_sta_wep_configured(struct net_device *dev)
1102 {
1103         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1104         if (!sdata || !sdata->default_key ||
1105             sdata->default_key->conf.alg != ALG_WEP)
1106                 return 0;
1107         return 1;
1108 }
1109
1110
1111 static void ieee80211_auth_completed(struct net_device *dev,
1112                                      struct ieee80211_if_sta *ifsta)
1113 {
1114         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1115         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1116         ieee80211_associate(dev, ifsta);
1117 }
1118
1119
1120 static void ieee80211_auth_challenge(struct net_device *dev,
1121                                      struct ieee80211_if_sta *ifsta,
1122                                      struct ieee80211_mgmt *mgmt,
1123                                      size_t len)
1124 {
1125         u8 *pos;
1126         struct ieee802_11_elems elems;
1127
1128         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1129         pos = mgmt->u.auth.variable;
1130         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1131         if (!elems.challenge) {
1132                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1133                        "frame\n", dev->name);
1134                 return;
1135         }
1136         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1137                             elems.challenge_len + 2, 1);
1138 }
1139
1140 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1141                                         u8 dialog_token, u16 status, u16 policy,
1142                                         u16 buf_size, u16 timeout)
1143 {
1144         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1145         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1146         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1147         struct sk_buff *skb;
1148         struct ieee80211_mgmt *mgmt;
1149         u16 capab;
1150
1151         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1152
1153         if (!skb) {
1154                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1155                        "for addba resp frame\n", dev->name);
1156                 return;
1157         }
1158
1159         skb_reserve(skb, local->hw.extra_tx_headroom);
1160         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1161         memset(mgmt, 0, 24);
1162         memcpy(mgmt->da, da, ETH_ALEN);
1163         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1164         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1165                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1166         else
1167                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1168         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1169                                            IEEE80211_STYPE_ACTION);
1170
1171         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1172         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1173         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1174         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1175
1176         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1177         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1178         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1179
1180         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1181         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1182         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1183
1184         ieee80211_sta_tx(dev, skb, 0);
1185
1186         return;
1187 }
1188
1189 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1190                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1191                                 u16 agg_size, u16 timeout)
1192 {
1193         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1194         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1195         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1196         struct sk_buff *skb;
1197         struct ieee80211_mgmt *mgmt;
1198         u16 capab;
1199
1200         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1201
1202         if (!skb) {
1203                 printk(KERN_ERR "%s: failed to allocate buffer "
1204                                 "for addba request frame\n", dev->name);
1205                 return;
1206         }
1207         skb_reserve(skb, local->hw.extra_tx_headroom);
1208         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1209         memset(mgmt, 0, 24);
1210         memcpy(mgmt->da, da, ETH_ALEN);
1211         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1212         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1213                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1214         else
1215                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1216
1217         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1218                                         IEEE80211_STYPE_ACTION);
1219
1220         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1221
1222         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1223         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1224
1225         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1226         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1227         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1228         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1229
1230         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1231
1232         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1233         mgmt->u.action.u.addba_req.start_seq_num =
1234                                         cpu_to_le16(start_seq_num << 4);
1235
1236         ieee80211_sta_tx(dev, skb, 0);
1237 }
1238
1239 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1240                                                 struct ieee80211_mgmt *mgmt,
1241                                                 size_t len)
1242 {
1243         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1244         struct ieee80211_hw *hw = &local->hw;
1245         struct ieee80211_conf *conf = &hw->conf;
1246         struct sta_info *sta;
1247         struct tid_ampdu_rx *tid_agg_rx;
1248         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1249         u8 dialog_token;
1250         int ret = -EOPNOTSUPP;
1251         DECLARE_MAC_BUF(mac);
1252
1253         rcu_read_lock();
1254
1255         sta = sta_info_get(local, mgmt->sa);
1256         if (!sta) {
1257                 rcu_read_unlock();
1258                 return;
1259         }
1260
1261         /* extract session parameters from addba request frame */
1262         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1263         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1264         start_seq_num =
1265                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1266
1267         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1268         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1269         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1270         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1271
1272         status = WLAN_STATUS_REQUEST_DECLINED;
1273
1274         /* sanity check for incoming parameters:
1275          * check if configuration can support the BA policy
1276          * and if buffer size does not exceeds max value */
1277         if (((ba_policy != 1)
1278                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1279                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1280                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1281 #ifdef CONFIG_MAC80211_HT_DEBUG
1282                 if (net_ratelimit())
1283                         printk(KERN_DEBUG "AddBA Req with bad params from "
1284                                 "%s on tid %u. policy %d, buffer size %d\n",
1285                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1286                                 buf_size);
1287 #endif /* CONFIG_MAC80211_HT_DEBUG */
1288                 goto end_no_lock;
1289         }
1290         /* determine default buffer size */
1291         if (buf_size == 0) {
1292                 struct ieee80211_supported_band *sband;
1293
1294                 sband = local->hw.wiphy->bands[conf->channel->band];
1295                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1296                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1297         }
1298
1299
1300         /* examine state machine */
1301         spin_lock_bh(&sta->lock);
1302
1303         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1304 #ifdef CONFIG_MAC80211_HT_DEBUG
1305                 if (net_ratelimit())
1306                         printk(KERN_DEBUG "unexpected AddBA Req from "
1307                                 "%s on tid %u\n",
1308                                 print_mac(mac, mgmt->sa), tid);
1309 #endif /* CONFIG_MAC80211_HT_DEBUG */
1310                 goto end;
1311         }
1312
1313         /* prepare A-MPDU MLME for Rx aggregation */
1314         sta->ampdu_mlme.tid_rx[tid] =
1315                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1316         if (!sta->ampdu_mlme.tid_rx[tid]) {
1317                 if (net_ratelimit())
1318                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1319                                         tid);
1320                 goto end;
1321         }
1322         /* rx timer */
1323         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1324                                 sta_rx_agg_session_timer_expired;
1325         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1326                                 (unsigned long)&sta->timer_to_tid[tid];
1327         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1328
1329         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1330
1331         /* prepare reordering buffer */
1332         tid_agg_rx->reorder_buf =
1333                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1334         if (!tid_agg_rx->reorder_buf) {
1335                 if (net_ratelimit())
1336                         printk(KERN_ERR "can not allocate reordering buffer "
1337                                "to tid %d\n", tid);
1338                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1339                 goto end;
1340         }
1341         memset(tid_agg_rx->reorder_buf, 0,
1342                 buf_size * sizeof(struct sk_buf *));
1343
1344         if (local->ops->ampdu_action)
1345                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1346                                                sta->addr, tid, &start_seq_num);
1347 #ifdef CONFIG_MAC80211_HT_DEBUG
1348         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1349 #endif /* CONFIG_MAC80211_HT_DEBUG */
1350
1351         if (ret) {
1352                 kfree(tid_agg_rx->reorder_buf);
1353                 kfree(tid_agg_rx);
1354                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1355                 goto end;
1356         }
1357
1358         /* change state and send addba resp */
1359         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1360         tid_agg_rx->dialog_token = dialog_token;
1361         tid_agg_rx->ssn = start_seq_num;
1362         tid_agg_rx->head_seq_num = start_seq_num;
1363         tid_agg_rx->buf_size = buf_size;
1364         tid_agg_rx->timeout = timeout;
1365         tid_agg_rx->stored_mpdu_num = 0;
1366         status = WLAN_STATUS_SUCCESS;
1367 end:
1368         spin_unlock_bh(&sta->lock);
1369
1370 end_no_lock:
1371         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1372                                   dialog_token, status, 1, buf_size, timeout);
1373         rcu_read_unlock();
1374 }
1375
1376 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1377                                              struct ieee80211_mgmt *mgmt,
1378                                              size_t len)
1379 {
1380         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1381         struct ieee80211_hw *hw = &local->hw;
1382         struct sta_info *sta;
1383         u16 capab;
1384         u16 tid;
1385         u8 *state;
1386
1387         rcu_read_lock();
1388
1389         sta = sta_info_get(local, mgmt->sa);
1390         if (!sta) {
1391                 rcu_read_unlock();
1392                 return;
1393         }
1394
1395         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1396         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1397
1398         state = &sta->ampdu_mlme.tid_state_tx[tid];
1399
1400         spin_lock_bh(&sta->lock);
1401
1402         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1403                 spin_unlock_bh(&sta->lock);
1404                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1405                         "%d\n", *state);
1406                 goto addba_resp_exit;
1407         }
1408
1409         if (mgmt->u.action.u.addba_resp.dialog_token !=
1410                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1411                 spin_unlock_bh(&sta->lock);
1412 #ifdef CONFIG_MAC80211_HT_DEBUG
1413                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1414 #endif /* CONFIG_MAC80211_HT_DEBUG */
1415                 goto addba_resp_exit;
1416         }
1417
1418         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1419 #ifdef CONFIG_MAC80211_HT_DEBUG
1420         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1421 #endif /* CONFIG_MAC80211_HT_DEBUG */
1422         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1423                         == WLAN_STATUS_SUCCESS) {
1424                 if (*state & HT_ADDBA_RECEIVED_MSK)
1425                         printk(KERN_DEBUG "double addBA response\n");
1426
1427                 *state |= HT_ADDBA_RECEIVED_MSK;
1428                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1429
1430                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1431                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1432                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1433                 }
1434
1435                 spin_unlock_bh(&sta->lock);
1436                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1437         } else {
1438                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1439
1440                 sta->ampdu_mlme.addba_req_num[tid]++;
1441                 /* this will allow the state check in stop_BA_session */
1442                 *state = HT_AGG_STATE_OPERATIONAL;
1443                 spin_unlock_bh(&sta->lock);
1444                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1445                                              WLAN_BACK_INITIATOR);
1446         }
1447
1448 addba_resp_exit:
1449         rcu_read_unlock();
1450 }
1451
1452 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1453                           u16 initiator, u16 reason_code)
1454 {
1455         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1456         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1457         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1458         struct sk_buff *skb;
1459         struct ieee80211_mgmt *mgmt;
1460         u16 params;
1461
1462         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1463
1464         if (!skb) {
1465                 printk(KERN_ERR "%s: failed to allocate buffer "
1466                                         "for delba frame\n", dev->name);
1467                 return;
1468         }
1469
1470         skb_reserve(skb, local->hw.extra_tx_headroom);
1471         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1472         memset(mgmt, 0, 24);
1473         memcpy(mgmt->da, da, ETH_ALEN);
1474         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1475         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1476                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1477         else
1478                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1479         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1480                                         IEEE80211_STYPE_ACTION);
1481
1482         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1483
1484         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1485         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1486         params = (u16)(initiator << 11);        /* bit 11 initiator */
1487         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1488
1489         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1490         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1491
1492         ieee80211_sta_tx(dev, skb, 0);
1493 }
1494
1495 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1496                                         u16 initiator, u16 reason)
1497 {
1498         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1499         struct ieee80211_hw *hw = &local->hw;
1500         struct sta_info *sta;
1501         int ret, i;
1502         DECLARE_MAC_BUF(mac);
1503
1504         rcu_read_lock();
1505
1506         sta = sta_info_get(local, ra);
1507         if (!sta) {
1508                 rcu_read_unlock();
1509                 return;
1510         }
1511
1512         /* check if TID is in operational state */
1513         spin_lock_bh(&sta->lock);
1514         if (sta->ampdu_mlme.tid_state_rx[tid]
1515                                 != HT_AGG_STATE_OPERATIONAL) {
1516                 spin_unlock_bh(&sta->lock);
1517                 rcu_read_unlock();
1518                 return;
1519         }
1520         sta->ampdu_mlme.tid_state_rx[tid] =
1521                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1522                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1523         spin_unlock_bh(&sta->lock);
1524
1525         /* stop HW Rx aggregation. ampdu_action existence
1526          * already verified in session init so we add the BUG_ON */
1527         BUG_ON(!local->ops->ampdu_action);
1528
1529 #ifdef CONFIG_MAC80211_HT_DEBUG
1530         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1531                                 print_mac(mac, ra), tid);
1532 #endif /* CONFIG_MAC80211_HT_DEBUG */
1533
1534         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1535                                         ra, tid, NULL);
1536         if (ret)
1537                 printk(KERN_DEBUG "HW problem - can not stop rx "
1538                                 "aggergation for tid %d\n", tid);
1539
1540         /* shutdown timer has not expired */
1541         if (initiator != WLAN_BACK_TIMER)
1542                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1543
1544         /* check if this is a self generated aggregation halt */
1545         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1546                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1547
1548         /* free the reordering buffer */
1549         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1550                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1551                         /* release the reordered frames */
1552                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1553                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1554                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1555                 }
1556         }
1557         /* free resources */
1558         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1559         kfree(sta->ampdu_mlme.tid_rx[tid]);
1560         sta->ampdu_mlme.tid_rx[tid] = NULL;
1561         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1562
1563         rcu_read_unlock();
1564 }
1565
1566
1567 static void ieee80211_sta_process_delba(struct net_device *dev,
1568                         struct ieee80211_mgmt *mgmt, size_t len)
1569 {
1570         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1571         struct sta_info *sta;
1572         u16 tid, params;
1573         u16 initiator;
1574         DECLARE_MAC_BUF(mac);
1575
1576         rcu_read_lock();
1577
1578         sta = sta_info_get(local, mgmt->sa);
1579         if (!sta) {
1580                 rcu_read_unlock();
1581                 return;
1582         }
1583
1584         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1585         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1586         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1587
1588 #ifdef CONFIG_MAC80211_HT_DEBUG
1589         if (net_ratelimit())
1590                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1591                         print_mac(mac, mgmt->sa),
1592                         initiator ? "initiator" : "recipient", tid,
1593                         mgmt->u.action.u.delba.reason_code);
1594 #endif /* CONFIG_MAC80211_HT_DEBUG */
1595
1596         if (initiator == WLAN_BACK_INITIATOR)
1597                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1598                                                  WLAN_BACK_INITIATOR, 0);
1599         else { /* WLAN_BACK_RECIPIENT */
1600                 spin_lock_bh(&sta->lock);
1601                 sta->ampdu_mlme.tid_state_tx[tid] =
1602                                 HT_AGG_STATE_OPERATIONAL;
1603                 spin_unlock_bh(&sta->lock);
1604                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1605                                              WLAN_BACK_RECIPIENT);
1606         }
1607         rcu_read_unlock();
1608 }
1609
1610 /*
1611  * After sending add Block Ack request we activated a timer until
1612  * add Block Ack response will arrive from the recipient.
1613  * If this timer expires sta_addba_resp_timer_expired will be executed.
1614  */
1615 void sta_addba_resp_timer_expired(unsigned long data)
1616 {
1617         /* not an elegant detour, but there is no choice as the timer passes
1618          * only one argument, and both sta_info and TID are needed, so init
1619          * flow in sta_info_create gives the TID as data, while the timer_to_id
1620          * array gives the sta through container_of */
1621         u16 tid = *(int *)data;
1622         struct sta_info *temp_sta = container_of((void *)data,
1623                 struct sta_info, timer_to_tid[tid]);
1624
1625         struct ieee80211_local *local = temp_sta->local;
1626         struct ieee80211_hw *hw = &local->hw;
1627         struct sta_info *sta;
1628         u8 *state;
1629
1630         rcu_read_lock();
1631
1632         sta = sta_info_get(local, temp_sta->addr);
1633         if (!sta) {
1634                 rcu_read_unlock();
1635                 return;
1636         }
1637
1638         state = &sta->ampdu_mlme.tid_state_tx[tid];
1639         /* check if the TID waits for addBA response */
1640         spin_lock_bh(&sta->lock);
1641         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1642                 spin_unlock_bh(&sta->lock);
1643                 *state = HT_AGG_STATE_IDLE;
1644                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1645                                 "expecting addBA response there", tid);
1646                 goto timer_expired_exit;
1647         }
1648
1649         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1650
1651         /* go through the state check in stop_BA_session */
1652         *state = HT_AGG_STATE_OPERATIONAL;
1653         spin_unlock_bh(&sta->lock);
1654         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1655                                      WLAN_BACK_INITIATOR);
1656
1657 timer_expired_exit:
1658         rcu_read_unlock();
1659 }
1660
1661 /*
1662  * After accepting the AddBA Request we activated a timer,
1663  * resetting it after each frame that arrives from the originator.
1664  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1665  */
1666 static void sta_rx_agg_session_timer_expired(unsigned long data)
1667 {
1668         /* not an elegant detour, but there is no choice as the timer passes
1669          * only one argument, and verious sta_info are needed here, so init
1670          * flow in sta_info_create gives the TID as data, while the timer_to_id
1671          * array gives the sta through container_of */
1672         u8 *ptid = (u8 *)data;
1673         u8 *timer_to_id = ptid - *ptid;
1674         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1675                                          timer_to_tid[0]);
1676
1677         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1678         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1679                                          (u16)*ptid, WLAN_BACK_TIMER,
1680                                          WLAN_REASON_QSTA_TIMEOUT);
1681 }
1682
1683 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1684 {
1685         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1686         int i;
1687
1688         for (i = 0; i <  STA_TID_NUM; i++) {
1689                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1690                                              WLAN_BACK_INITIATOR);
1691                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1692                                                  WLAN_BACK_RECIPIENT,
1693                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1694         }
1695 }
1696
1697 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1698                                    struct ieee80211_if_sta *ifsta,
1699                                    struct ieee80211_mgmt *mgmt,
1700                                    size_t len)
1701 {
1702         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1703         u16 auth_alg, auth_transaction, status_code;
1704         DECLARE_MAC_BUF(mac);
1705
1706         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1707             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1708                 printk(KERN_DEBUG "%s: authentication frame received from "
1709                        "%s, but not in authenticate state - ignored\n",
1710                        dev->name, print_mac(mac, mgmt->sa));
1711                 return;
1712         }
1713
1714         if (len < 24 + 6) {
1715                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1716                        "received from %s - ignored\n",
1717                        dev->name, len, print_mac(mac, mgmt->sa));
1718                 return;
1719         }
1720
1721         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1722             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1723                 printk(KERN_DEBUG "%s: authentication frame received from "
1724                        "unknown AP (SA=%s BSSID=%s) - "
1725                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1726                        print_mac(mac, mgmt->bssid));
1727                 return;
1728         }
1729
1730         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1731             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1732                 printk(KERN_DEBUG "%s: authentication frame received from "
1733                        "unknown BSSID (SA=%s BSSID=%s) - "
1734                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1735                        print_mac(mac, mgmt->bssid));
1736                 return;
1737         }
1738
1739         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1740         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1741         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1742
1743         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1744                "transaction=%d status=%d)\n",
1745                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1746                auth_transaction, status_code);
1747
1748         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1749                 /* IEEE 802.11 standard does not require authentication in IBSS
1750                  * networks and most implementations do not seem to use it.
1751                  * However, try to reply to authentication attempts if someone
1752                  * has actually implemented this.
1753                  * TODO: Could implement shared key authentication. */
1754                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1755                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1756                                "frame (alg=%d transaction=%d)\n",
1757                                dev->name, auth_alg, auth_transaction);
1758                         return;
1759                 }
1760                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1761         }
1762
1763         if (auth_alg != ifsta->auth_alg ||
1764             auth_transaction != ifsta->auth_transaction) {
1765                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1766                        "(alg=%d transaction=%d)\n",
1767                        dev->name, auth_alg, auth_transaction);
1768                 return;
1769         }
1770
1771         if (status_code != WLAN_STATUS_SUCCESS) {
1772                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1773                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1774                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1775                         u8 algs[3];
1776                         const int num_algs = ARRAY_SIZE(algs);
1777                         int i, pos;
1778                         algs[0] = algs[1] = algs[2] = 0xff;
1779                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1780                                 algs[0] = WLAN_AUTH_OPEN;
1781                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1782                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1783                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1784                                 algs[2] = WLAN_AUTH_LEAP;
1785                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1786                                 pos = 0;
1787                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1788                                 pos = 1;
1789                         else
1790                                 pos = 2;
1791                         for (i = 0; i < num_algs; i++) {
1792                                 pos++;
1793                                 if (pos >= num_algs)
1794                                         pos = 0;
1795                                 if (algs[pos] == ifsta->auth_alg ||
1796                                     algs[pos] == 0xff)
1797                                         continue;
1798                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1799                                     !ieee80211_sta_wep_configured(dev))
1800                                         continue;
1801                                 ifsta->auth_alg = algs[pos];
1802                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1803                                        "next try\n",
1804                                        dev->name, ifsta->auth_alg);
1805                                 break;
1806                         }
1807                 }
1808                 return;
1809         }
1810
1811         switch (ifsta->auth_alg) {
1812         case WLAN_AUTH_OPEN:
1813         case WLAN_AUTH_LEAP:
1814                 ieee80211_auth_completed(dev, ifsta);
1815                 break;
1816         case WLAN_AUTH_SHARED_KEY:
1817                 if (ifsta->auth_transaction == 4)
1818                         ieee80211_auth_completed(dev, ifsta);
1819                 else
1820                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1821                 break;
1822         }
1823 }
1824
1825
1826 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1827                                      struct ieee80211_if_sta *ifsta,
1828                                      struct ieee80211_mgmt *mgmt,
1829                                      size_t len)
1830 {
1831         u16 reason_code;
1832         DECLARE_MAC_BUF(mac);
1833
1834         if (len < 24 + 2) {
1835                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1836                        "received from %s - ignored\n",
1837                        dev->name, len, print_mac(mac, mgmt->sa));
1838                 return;
1839         }
1840
1841         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1842                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1843                        "unknown AP (SA=%s BSSID=%s) - "
1844                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1845                        print_mac(mac, mgmt->bssid));
1846                 return;
1847         }
1848
1849         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1850
1851         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1852                " (reason=%d)\n",
1853                dev->name, print_mac(mac, mgmt->sa), reason_code);
1854
1855         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1856                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1857
1858         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1859             ifsta->state == IEEE80211_ASSOCIATE ||
1860             ifsta->state == IEEE80211_ASSOCIATED) {
1861                 ifsta->state = IEEE80211_AUTHENTICATE;
1862                 mod_timer(&ifsta->timer, jiffies +
1863                                       IEEE80211_RETRY_AUTH_INTERVAL);
1864         }
1865
1866         ieee80211_set_disassoc(dev, ifsta, 1);
1867         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1868 }
1869
1870
1871 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1872                                        struct ieee80211_if_sta *ifsta,
1873                                        struct ieee80211_mgmt *mgmt,
1874                                        size_t len)
1875 {
1876         u16 reason_code;
1877         DECLARE_MAC_BUF(mac);
1878
1879         if (len < 24 + 2) {
1880                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1881                        "received from %s - ignored\n",
1882                        dev->name, len, print_mac(mac, mgmt->sa));
1883                 return;
1884         }
1885
1886         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1887                 printk(KERN_DEBUG "%s: disassociation frame received from "
1888                        "unknown AP (SA=%s BSSID=%s) - "
1889                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1890                        print_mac(mac, mgmt->bssid));
1891                 return;
1892         }
1893
1894         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1895
1896         printk(KERN_DEBUG "%s: RX disassociation from %s"
1897                " (reason=%d)\n",
1898                dev->name, print_mac(mac, mgmt->sa), reason_code);
1899
1900         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1901                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1902
1903         if (ifsta->state == IEEE80211_ASSOCIATED) {
1904                 ifsta->state = IEEE80211_ASSOCIATE;
1905                 mod_timer(&ifsta->timer, jiffies +
1906                                       IEEE80211_RETRY_AUTH_INTERVAL);
1907         }
1908
1909         ieee80211_set_disassoc(dev, ifsta, 0);
1910 }
1911
1912
1913 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1914                                          struct ieee80211_if_sta *ifsta,
1915                                          struct ieee80211_mgmt *mgmt,
1916                                          size_t len,
1917                                          int reassoc)
1918 {
1919         struct ieee80211_local *local = sdata->local;
1920         struct net_device *dev = sdata->dev;
1921         struct ieee80211_supported_band *sband;
1922         struct sta_info *sta;
1923         u64 rates, basic_rates;
1924         u16 capab_info, status_code, aid;
1925         struct ieee802_11_elems elems;
1926         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1927         u8 *pos;
1928         int i, j;
1929         DECLARE_MAC_BUF(mac);
1930         bool have_higher_than_11mbit = false;
1931
1932         /* AssocResp and ReassocResp have identical structure, so process both
1933          * of them in this function. */
1934
1935         if (ifsta->state != IEEE80211_ASSOCIATE) {
1936                 printk(KERN_DEBUG "%s: association frame received from "
1937                        "%s, but not in associate state - ignored\n",
1938                        dev->name, print_mac(mac, mgmt->sa));
1939                 return;
1940         }
1941
1942         if (len < 24 + 6) {
1943                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1944                        "received from %s - ignored\n",
1945                        dev->name, len, print_mac(mac, mgmt->sa));
1946                 return;
1947         }
1948
1949         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1950                 printk(KERN_DEBUG "%s: association frame received from "
1951                        "unknown AP (SA=%s BSSID=%s) - "
1952                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1953                        print_mac(mac, mgmt->bssid));
1954                 return;
1955         }
1956
1957         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1958         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1959         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1960
1961         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1962                "status=%d aid=%d)\n",
1963                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1964                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1965
1966         if (status_code != WLAN_STATUS_SUCCESS) {
1967                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1968                        dev->name, status_code);
1969                 /* if this was a reassociation, ensure we try a "full"
1970                  * association next time. This works around some broken APs
1971                  * which do not correctly reject reassociation requests. */
1972                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1973                 return;
1974         }
1975
1976         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1977                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1978                        "set\n", dev->name, aid);
1979         aid &= ~(BIT(15) | BIT(14));
1980
1981         pos = mgmt->u.assoc_resp.variable;
1982         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1983
1984         if (!elems.supp_rates) {
1985                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1986                        dev->name);
1987                 return;
1988         }
1989
1990         printk(KERN_DEBUG "%s: associated\n", dev->name);
1991         ifsta->aid = aid;
1992         ifsta->ap_capab = capab_info;
1993
1994         kfree(ifsta->assocresp_ies);
1995         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1996         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1997         if (ifsta->assocresp_ies)
1998                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1999
2000         rcu_read_lock();
2001
2002         /* Add STA entry for the AP */
2003         sta = sta_info_get(local, ifsta->bssid);
2004         if (!sta) {
2005                 struct ieee80211_sta_bss *bss;
2006                 int err;
2007
2008                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2009                 if (!sta) {
2010                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2011                                " the AP\n", dev->name);
2012                         rcu_read_unlock();
2013                         return;
2014                 }
2015                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2016                                            local->hw.conf.channel->center_freq,
2017                                            ifsta->ssid, ifsta->ssid_len);
2018                 if (bss) {
2019                         sta->last_signal = bss->signal;
2020                         sta->last_qual = bss->qual;
2021                         sta->last_noise = bss->noise;
2022                         ieee80211_rx_bss_put(dev, bss);
2023                 }
2024
2025                 err = sta_info_insert(sta);
2026                 if (err) {
2027                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2028                                " the AP (error %d)\n", dev->name, err);
2029                         rcu_read_unlock();
2030                         return;
2031                 }
2032         }
2033
2034         /*
2035          * FIXME: Do we really need to update the sta_info's information here?
2036          *        We already know about the AP (we found it in our list) so it
2037          *        should already be filled with the right info, no?
2038          *        As is stands, all this is racy because typically we assume
2039          *        the information that is filled in here (except flags) doesn't
2040          *        change while a STA structure is alive. As such, it should move
2041          *        to between the sta_info_alloc() and sta_info_insert() above.
2042          */
2043
2044         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2045                            WLAN_STA_AUTHORIZED);
2046
2047         rates = 0;
2048         basic_rates = 0;
2049         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2050
2051         for (i = 0; i < elems.supp_rates_len; i++) {
2052                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2053
2054                 if (rate > 110)
2055                         have_higher_than_11mbit = true;
2056
2057                 for (j = 0; j < sband->n_bitrates; j++) {
2058                         if (sband->bitrates[j].bitrate == rate)
2059                                 rates |= BIT(j);
2060                         if (elems.supp_rates[i] & 0x80)
2061                                 basic_rates |= BIT(j);
2062                 }
2063         }
2064
2065         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2066                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2067
2068                 if (rate > 110)
2069                         have_higher_than_11mbit = true;
2070
2071                 for (j = 0; j < sband->n_bitrates; j++) {
2072                         if (sband->bitrates[j].bitrate == rate)
2073                                 rates |= BIT(j);
2074                         if (elems.ext_supp_rates[i] & 0x80)
2075                                 basic_rates |= BIT(j);
2076                 }
2077         }
2078
2079         sta->supp_rates[local->hw.conf.channel->band] = rates;
2080         sdata->basic_rates = basic_rates;
2081
2082         /* cf. IEEE 802.11 9.2.12 */
2083         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2084             have_higher_than_11mbit)
2085                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2086         else
2087                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2088
2089         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2090             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2091                 struct ieee80211_ht_bss_info bss_info;
2092                 ieee80211_ht_cap_ie_to_ht_info(
2093                                 (struct ieee80211_ht_cap *)
2094                                 elems.ht_cap_elem, &sta->ht_info);
2095                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2096                                 (struct ieee80211_ht_addt_info *)
2097                                 elems.ht_info_elem, &bss_info);
2098                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2099         }
2100
2101         rate_control_rate_init(sta, local);
2102
2103         if (elems.wmm_param) {
2104                 set_sta_flags(sta, WLAN_STA_WME);
2105                 rcu_read_unlock();
2106                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2107                                          elems.wmm_param_len);
2108         } else
2109                 rcu_read_unlock();
2110
2111         /* set AID and assoc capability,
2112          * ieee80211_set_associated() will tell the driver */
2113         bss_conf->aid = aid;
2114         bss_conf->assoc_capability = capab_info;
2115         ieee80211_set_associated(dev, ifsta, 1);
2116
2117         ieee80211_associated(dev, ifsta);
2118 }
2119
2120
2121 /* Caller must hold local->sta_bss_lock */
2122 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2123                                         struct ieee80211_sta_bss *bss)
2124 {
2125         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2126         u8 hash_idx;
2127
2128         if (bss_mesh_cfg(bss))
2129                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2130                                         bss_mesh_id_len(bss));
2131         else
2132                 hash_idx = STA_HASH(bss->bssid);
2133
2134         bss->hnext = local->sta_bss_hash[hash_idx];
2135         local->sta_bss_hash[hash_idx] = bss;
2136 }
2137
2138
2139 /* Caller must hold local->sta_bss_lock */
2140 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2141                                         struct ieee80211_sta_bss *bss)
2142 {
2143         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2144         struct ieee80211_sta_bss *b, *prev = NULL;
2145         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2146         while (b) {
2147                 if (b == bss) {
2148                         if (!prev)
2149                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2150                                         bss->hnext;
2151                         else
2152                                 prev->hnext = bss->hnext;
2153                         break;
2154                 }
2155                 prev = b;
2156                 b = b->hnext;
2157         }
2158 }
2159
2160
2161 static struct ieee80211_sta_bss *
2162 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2163                      u8 *ssid, u8 ssid_len)
2164 {
2165         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2166         struct ieee80211_sta_bss *bss;
2167
2168         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2169         if (!bss)
2170                 return NULL;
2171         atomic_inc(&bss->users);
2172         atomic_inc(&bss->users);
2173         memcpy(bss->bssid, bssid, ETH_ALEN);
2174         bss->freq = freq;
2175         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2176                 memcpy(bss->ssid, ssid, ssid_len);
2177                 bss->ssid_len = ssid_len;
2178         }
2179
2180         spin_lock_bh(&local->sta_bss_lock);
2181         /* TODO: order by RSSI? */
2182         list_add_tail(&bss->list, &local->sta_bss_list);
2183         __ieee80211_rx_bss_hash_add(dev, bss);
2184         spin_unlock_bh(&local->sta_bss_lock);
2185         return bss;
2186 }
2187
2188 static struct ieee80211_sta_bss *
2189 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2190                      u8 *ssid, u8 ssid_len)
2191 {
2192         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2193         struct ieee80211_sta_bss *bss;
2194
2195         spin_lock_bh(&local->sta_bss_lock);
2196         bss = local->sta_bss_hash[STA_HASH(bssid)];
2197         while (bss) {
2198                 if (!bss_mesh_cfg(bss) &&
2199                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2200                     bss->freq == freq &&
2201                     bss->ssid_len == ssid_len &&
2202                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2203                         atomic_inc(&bss->users);
2204                         break;
2205                 }
2206                 bss = bss->hnext;
2207         }
2208         spin_unlock_bh(&local->sta_bss_lock);
2209         return bss;
2210 }
2211
2212 #ifdef CONFIG_MAC80211_MESH
2213 static struct ieee80211_sta_bss *
2214 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2215                           u8 *mesh_cfg, int freq)
2216 {
2217         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2218         struct ieee80211_sta_bss *bss;
2219
2220         spin_lock_bh(&local->sta_bss_lock);
2221         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2222         while (bss) {
2223                 if (bss_mesh_cfg(bss) &&
2224                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2225                     bss->freq == freq &&
2226                     mesh_id_len == bss->mesh_id_len &&
2227                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2228                                                  mesh_id_len))) {
2229                         atomic_inc(&bss->users);
2230                         break;
2231                 }
2232                 bss = bss->hnext;
2233         }
2234         spin_unlock_bh(&local->sta_bss_lock);
2235         return bss;
2236 }
2237
2238 static struct ieee80211_sta_bss *
2239 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2240                           u8 *mesh_cfg, int mesh_config_len, int freq)
2241 {
2242         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2243         struct ieee80211_sta_bss *bss;
2244
2245         if (mesh_config_len != MESH_CFG_LEN)
2246                 return NULL;
2247
2248         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2249         if (!bss)
2250                 return NULL;
2251
2252         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2253         if (!bss->mesh_cfg) {
2254                 kfree(bss);
2255                 return NULL;
2256         }
2257
2258         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2259                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2260                 if (!bss->mesh_id) {
2261                         kfree(bss->mesh_cfg);
2262                         kfree(bss);
2263                         return NULL;
2264                 }
2265                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2266         }
2267
2268         atomic_inc(&bss->users);
2269         atomic_inc(&bss->users);
2270         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2271         bss->mesh_id_len = mesh_id_len;
2272         bss->freq = freq;
2273         spin_lock_bh(&local->sta_bss_lock);
2274         /* TODO: order by RSSI? */
2275         list_add_tail(&bss->list, &local->sta_bss_list);
2276         __ieee80211_rx_bss_hash_add(dev, bss);
2277         spin_unlock_bh(&local->sta_bss_lock);
2278         return bss;
2279 }
2280 #endif
2281
2282 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2283 {
2284         kfree(bss->wpa_ie);
2285         kfree(bss->rsn_ie);
2286         kfree(bss->wmm_ie);
2287         kfree(bss->ht_ie);
2288         kfree(bss->ht_add_ie);
2289         kfree(bss_mesh_id(bss));
2290         kfree(bss_mesh_cfg(bss));
2291         kfree(bss);
2292 }
2293
2294
2295 static void ieee80211_rx_bss_put(struct net_device *dev,
2296                                  struct ieee80211_sta_bss *bss)
2297 {
2298         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2299
2300         local_bh_disable();
2301         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2302                 local_bh_enable();
2303                 return;
2304         }
2305
2306         __ieee80211_rx_bss_hash_del(dev, bss);
2307         list_del(&bss->list);
2308         spin_unlock_bh(&local->sta_bss_lock);
2309         ieee80211_rx_bss_free(bss);
2310 }
2311
2312
2313 void ieee80211_rx_bss_list_init(struct net_device *dev)
2314 {
2315         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2316         spin_lock_init(&local->sta_bss_lock);
2317         INIT_LIST_HEAD(&local->sta_bss_list);
2318 }
2319
2320
2321 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2322 {
2323         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2324         struct ieee80211_sta_bss *bss, *tmp;
2325
2326         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2327                 ieee80211_rx_bss_put(dev, bss);
2328 }
2329
2330
2331 static int ieee80211_sta_join_ibss(struct net_device *dev,
2332                                    struct ieee80211_if_sta *ifsta,
2333                                    struct ieee80211_sta_bss *bss)
2334 {
2335         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2336         int res, rates, i, j;
2337         struct sk_buff *skb;
2338         struct ieee80211_mgmt *mgmt;
2339         struct ieee80211_tx_info *control;
2340         struct rate_selection ratesel;
2341         u8 *pos;
2342         struct ieee80211_sub_if_data *sdata;
2343         struct ieee80211_supported_band *sband;
2344
2345         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2346
2347         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2348
2349         /* Remove possible STA entries from other IBSS networks. */
2350         sta_info_flush_delayed(sdata);
2351
2352         if (local->ops->reset_tsf) {
2353                 /* Reset own TSF to allow time synchronization work. */
2354                 local->ops->reset_tsf(local_to_hw(local));
2355         }
2356         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2357         res = ieee80211_if_config(dev);
2358         if (res)
2359                 return res;
2360
2361         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2362
2363         sdata->drop_unencrypted = bss->capability &
2364                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2365
2366         res = ieee80211_set_freq(local, bss->freq);
2367
2368         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2369                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2370                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2371                 return -1;
2372         }
2373
2374         /* Set beacon template */
2375         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2376         do {
2377                 if (!skb)
2378                         break;
2379
2380                 skb_reserve(skb, local->hw.extra_tx_headroom);
2381
2382                 mgmt = (struct ieee80211_mgmt *)
2383                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2384                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2385                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2386                                                    IEEE80211_STYPE_BEACON);
2387                 memset(mgmt->da, 0xff, ETH_ALEN);
2388                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2389                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2390                 mgmt->u.beacon.beacon_int =
2391                         cpu_to_le16(local->hw.conf.beacon_int);
2392                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2393
2394                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2395                 *pos++ = WLAN_EID_SSID;
2396                 *pos++ = ifsta->ssid_len;
2397                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2398
2399                 rates = bss->supp_rates_len;
2400                 if (rates > 8)
2401                         rates = 8;
2402                 pos = skb_put(skb, 2 + rates);
2403                 *pos++ = WLAN_EID_SUPP_RATES;
2404                 *pos++ = rates;
2405                 memcpy(pos, bss->supp_rates, rates);
2406
2407                 if (bss->band == IEEE80211_BAND_2GHZ) {
2408                         pos = skb_put(skb, 2 + 1);
2409                         *pos++ = WLAN_EID_DS_PARAMS;
2410                         *pos++ = 1;
2411                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2412                 }
2413
2414                 pos = skb_put(skb, 2 + 2);
2415                 *pos++ = WLAN_EID_IBSS_PARAMS;
2416                 *pos++ = 2;
2417                 /* FIX: set ATIM window based on scan results */
2418                 *pos++ = 0;
2419                 *pos++ = 0;
2420
2421                 if (bss->supp_rates_len > 8) {
2422                         rates = bss->supp_rates_len - 8;
2423                         pos = skb_put(skb, 2 + rates);
2424                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2425                         *pos++ = rates;
2426                         memcpy(pos, &bss->supp_rates[8], rates);
2427                 }
2428
2429                 control = IEEE80211_SKB_CB(skb);
2430
2431                 rate_control_get_rate(dev, sband, skb, &ratesel);
2432                 if (ratesel.rate_idx < 0) {
2433                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2434                                "for IBSS beacon\n", dev->name);
2435                         break;
2436                 }
2437                 control->control.vif = &sdata->vif;
2438                 control->tx_rate_idx = ratesel.rate_idx;
2439                 if (sdata->bss_conf.use_short_preamble &&
2440                     sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2441                         control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2442                 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2443                 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2444                 control->control.retry_limit = 1;
2445
2446                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2447                 if (ifsta->probe_resp) {
2448                         mgmt = (struct ieee80211_mgmt *)
2449                                 ifsta->probe_resp->data;
2450                         mgmt->frame_control =
2451                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2452                                              IEEE80211_STYPE_PROBE_RESP);
2453                 } else {
2454                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2455                                "template for IBSS\n", dev->name);
2456                 }
2457
2458                 if (local->ops->beacon_update &&
2459                     local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2460                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2461                                "template\n", dev->name);
2462                         skb = NULL;
2463                 }
2464
2465                 rates = 0;
2466                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2467                 for (i = 0; i < bss->supp_rates_len; i++) {
2468                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2469                         for (j = 0; j < sband->n_bitrates; j++)
2470                                 if (sband->bitrates[j].bitrate == bitrate)
2471                                         rates |= BIT(j);
2472                 }
2473                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2474
2475                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2476         } while (0);
2477
2478         if (skb) {
2479                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2480                        "template\n", dev->name);
2481                 dev_kfree_skb(skb);
2482         }
2483
2484         ifsta->state = IEEE80211_IBSS_JOINED;
2485         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2486
2487         ieee80211_rx_bss_put(dev, bss);
2488
2489         return res;
2490 }
2491
2492 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2493                             struct ieee802_11_elems *elems,
2494                             enum ieee80211_band band)
2495 {
2496         struct ieee80211_supported_band *sband;
2497         struct ieee80211_rate *bitrates;
2498         size_t num_rates;
2499         u64 supp_rates;
2500         int i, j;
2501         sband = local->hw.wiphy->bands[band];
2502
2503         if (!sband) {
2504                 WARN_ON(1);
2505                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2506         }
2507
2508         bitrates = sband->bitrates;
2509         num_rates = sband->n_bitrates;
2510         supp_rates = 0;
2511         for (i = 0; i < elems->supp_rates_len +
2512                      elems->ext_supp_rates_len; i++) {
2513                 u8 rate = 0;
2514                 int own_rate;
2515                 if (i < elems->supp_rates_len)
2516                         rate = elems->supp_rates[i];
2517                 else if (elems->ext_supp_rates)
2518                         rate = elems->ext_supp_rates
2519                                 [i - elems->supp_rates_len];
2520                 own_rate = 5 * (rate & 0x7f);
2521                 for (j = 0; j < num_rates; j++)
2522                         if (bitrates[j].bitrate == own_rate)
2523                                 supp_rates |= BIT(j);
2524         }
2525         return supp_rates;
2526 }
2527
2528
2529 static void ieee80211_rx_bss_info(struct net_device *dev,
2530                                   struct ieee80211_mgmt *mgmt,
2531                                   size_t len,
2532                                   struct ieee80211_rx_status *rx_status,
2533                                   int beacon)
2534 {
2535         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2536         struct ieee802_11_elems elems;
2537         size_t baselen;
2538         int freq, clen;
2539         struct ieee80211_sta_bss *bss;
2540         struct sta_info *sta;
2541         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2542         u64 beacon_timestamp, rx_timestamp;
2543         struct ieee80211_channel *channel;
2544         DECLARE_MAC_BUF(mac);
2545         DECLARE_MAC_BUF(mac2);
2546
2547         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2548                 return; /* ignore ProbeResp to foreign address */
2549
2550 #if 0
2551         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2552                dev->name, beacon ? "Beacon" : "Probe Response",
2553                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2554 #endif
2555
2556         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2557         if (baselen > len)
2558                 return;
2559
2560         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2561         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2562
2563         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2564             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2565                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2566                                                 rx_status->band);
2567
2568                 mesh_neighbour_update(mgmt->sa, rates, dev,
2569                                       mesh_peer_accepts_plinks(&elems, dev));
2570         }
2571
2572         rcu_read_lock();
2573
2574         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2575             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2576             (sta = sta_info_get(local, mgmt->sa))) {
2577                 u64 prev_rates;
2578                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2579                                                         rx_status->band);
2580
2581                 prev_rates = sta->supp_rates[rx_status->band];
2582                 sta->supp_rates[rx_status->band] &= supp_rates;
2583                 if (sta->supp_rates[rx_status->band] == 0) {
2584                         /* No matching rates - this should not really happen.
2585                          * Make sure that at least one rate is marked
2586                          * supported to avoid issues with TX rate ctrl. */
2587                         sta->supp_rates[rx_status->band] =
2588                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2589                 }
2590                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2591                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2592                                "%s based on beacon info (0x%llx & 0x%llx -> "
2593                                "0x%llx)\n",
2594                                dev->name, print_mac(mac, sta->addr),
2595                                (unsigned long long) prev_rates,
2596                                (unsigned long long) supp_rates,
2597                                (unsigned long long) sta->supp_rates[rx_status->band]);
2598                 }
2599         }
2600
2601         rcu_read_unlock();
2602
2603         if (elems.ds_params && elems.ds_params_len == 1)
2604                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2605         else
2606                 freq = rx_status->freq;
2607
2608         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2609
2610         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2611                 return;
2612
2613 #ifdef CONFIG_MAC80211_MESH
2614         if (elems.mesh_config)
2615                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2616                                 elems.mesh_id_len, elems.mesh_config, freq);
2617         else
2618 #endif
2619                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2620                                            elems.ssid, elems.ssid_len);
2621         if (!bss) {
2622 #ifdef CONFIG_MAC80211_MESH
2623                 if (elems.mesh_config)
2624                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2625                                 elems.mesh_id_len, elems.mesh_config,
2626                                 elems.mesh_config_len, freq);
2627                 else
2628 #endif
2629                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2630                                                    elems.ssid, elems.ssid_len);
2631                 if (!bss)
2632                         return;
2633         } else {
2634 #if 0
2635                 /* TODO: order by RSSI? */
2636                 spin_lock_bh(&local->sta_bss_lock);
2637                 list_move_tail(&bss->list, &local->sta_bss_list);
2638                 spin_unlock_bh(&local->sta_bss_lock);
2639 #endif
2640         }
2641
2642         /* save the ERP value so that it is available at association time */
2643         if (elems.erp_info && elems.erp_info_len >= 1) {
2644                 bss->erp_value = elems.erp_info[0];
2645                 bss->has_erp_value = 1;
2646         }
2647
2648         if (elems.ht_cap_elem &&
2649              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2650              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2651                 kfree(bss->ht_ie);
2652                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2653                 if (bss->ht_ie) {
2654                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2655                                 elems.ht_cap_elem_len + 2);
2656                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2657                 } else
2658                         bss->ht_ie_len = 0;
2659         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2660                 kfree(bss->ht_ie);
2661                 bss->ht_ie = NULL;
2662                 bss->ht_ie_len = 0;
2663         }
2664
2665         if (elems.ht_info_elem &&
2666              (!bss->ht_add_ie ||
2667              bss->ht_add_ie_len != elems.ht_info_elem_len ||
2668              memcmp(bss->ht_add_ie, elems.ht_info_elem,
2669                         elems.ht_info_elem_len))) {
2670                 kfree(bss->ht_add_ie);
2671                 bss->ht_add_ie =
2672                         kmalloc(elems.ht_info_elem_len + 2, GFP_ATOMIC);
2673                 if (bss->ht_add_ie) {
2674                         memcpy(bss->ht_add_ie, elems.ht_info_elem - 2,
2675                                 elems.ht_info_elem_len + 2);
2676                         bss->ht_add_ie_len = elems.ht_info_elem_len + 2;
2677                 } else
2678                         bss->ht_add_ie_len = 0;
2679         } else if (!elems.ht_info_elem && bss->ht_add_ie) {
2680                 kfree(bss->ht_add_ie);
2681                 bss->ht_add_ie = NULL;
2682                 bss->ht_add_ie_len = 0;
2683         }
2684
2685         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2686         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2687
2688         bss->supp_rates_len = 0;
2689         if (elems.supp_rates) {
2690                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2691                 if (clen > elems.supp_rates_len)
2692                         clen = elems.supp_rates_len;
2693                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2694                        clen);
2695                 bss->supp_rates_len += clen;
2696         }
2697         if (elems.ext_supp_rates) {
2698                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2699                 if (clen > elems.ext_supp_rates_len)
2700                         clen = elems.ext_supp_rates_len;
2701                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2702                        elems.ext_supp_rates, clen);
2703                 bss->supp_rates_len += clen;
2704         }
2705
2706         bss->band = rx_status->band;
2707
2708         bss->timestamp = beacon_timestamp;
2709         bss->last_update = jiffies;
2710         bss->signal = rx_status->signal;
2711         bss->noise = rx_status->noise;
2712         bss->qual = rx_status->qual;
2713         if (!beacon && !bss->probe_resp)
2714                 bss->probe_resp = true;
2715
2716         /*
2717          * In STA mode, the remaining parameters should not be overridden
2718          * by beacons because they're not necessarily accurate there.
2719          */
2720         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2721             bss->probe_resp && beacon) {
2722                 ieee80211_rx_bss_put(dev, bss);
2723                 return;
2724         }
2725
2726         if (elems.wpa &&
2727             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2728              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2729                 kfree(bss->wpa_ie);
2730                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2731                 if (bss->wpa_ie) {
2732                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2733                         bss->wpa_ie_len = elems.wpa_len + 2;
2734                 } else
2735                         bss->wpa_ie_len = 0;
2736         } else if (!elems.wpa && bss->wpa_ie) {
2737                 kfree(bss->wpa_ie);
2738                 bss->wpa_ie = NULL;
2739                 bss->wpa_ie_len = 0;
2740         }
2741
2742         if (elems.rsn &&
2743             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2744              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2745                 kfree(bss->rsn_ie);
2746                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2747                 if (bss->rsn_ie) {
2748                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2749                         bss->rsn_ie_len = elems.rsn_len + 2;
2750                 } else
2751                         bss->rsn_ie_len = 0;
2752         } else if (!elems.rsn && bss->rsn_ie) {
2753                 kfree(bss->rsn_ie);
2754                 bss->rsn_ie = NULL;
2755                 bss->rsn_ie_len = 0;
2756         }
2757
2758         /*
2759          * Cf.
2760          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2761          *
2762          * quoting:
2763          *
2764          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2765          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2766          * Alliance (September 1, 2004) is incorporated by reference herein.
2767          * The inclusion of the WMM Parameters in probe responses and
2768          * association responses is mandatory for WMM enabled networks. The
2769          * inclusion of the WMM Parameters in beacons, however, is optional.
2770          */
2771
2772         if (elems.wmm_param &&
2773             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2774              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2775                 kfree(bss->wmm_ie);
2776                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2777                 if (bss->wmm_ie) {
2778                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2779                                elems.wmm_param_len + 2);
2780                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2781                 } else
2782                         bss->wmm_ie_len = 0;
2783         } else if (elems.wmm_info &&
2784                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2785                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2786                  /* As for certain AP's Fifth bit is not set in WMM IE in
2787                   * beacon frames.So while parsing the beacon frame the
2788                   * wmm_info structure is used instead of wmm_param.
2789                   * wmm_info structure was never used to set bss->wmm_ie.
2790                   * This code fixes this problem by copying the WME
2791                   * information from wmm_info to bss->wmm_ie and enabling
2792                   * n-band association.
2793                   */
2794                 kfree(bss->wmm_ie);
2795                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2796                 if (bss->wmm_ie) {
2797                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2798                                elems.wmm_info_len + 2);
2799                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2800                 } else
2801                         bss->wmm_ie_len = 0;
2802         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2803                 kfree(bss->wmm_ie);
2804                 bss->wmm_ie = NULL;
2805                 bss->wmm_ie_len = 0;
2806         }
2807
2808         /* check if we need to merge IBSS */
2809         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2810             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2811             bss->capability & WLAN_CAPABILITY_IBSS &&
2812             bss->freq == local->oper_channel->center_freq &&
2813             elems.ssid_len == sdata->u.sta.ssid_len &&
2814             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2815                 if (rx_status->flag & RX_FLAG_TSFT) {
2816                         /* in order for correct IBSS merging we need mactime
2817                          *
2818                          * since mactime is defined as the time the first data
2819                          * symbol of the frame hits the PHY, and the timestamp
2820                          * of the beacon is defined as "the time that the data
2821                          * symbol containing the first bit of the timestamp is
2822                          * transmitted to the PHY plus the transmitting STA’s
2823                          * delays through its local PHY from the MAC-PHY
2824                          * interface to its interface with the WM"
2825                          * (802.11 11.1.2) - equals the time this bit arrives at
2826                          * the receiver - we have to take into account the
2827                          * offset between the two.
2828                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2829                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2830                          */
2831                         int rate = local->hw.wiphy->bands[rx_status->band]->
2832                                         bitrates[rx_status->rate_idx].bitrate;
2833                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2834                 } else if (local && local->ops && local->ops->get_tsf)
2835                         /* second best option: get current TSF */
2836                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2837                 else
2838                         /* can't merge without knowing the TSF */
2839                         rx_timestamp = -1LLU;
2840 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2841                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2842                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2843                        print_mac(mac, mgmt->sa),
2844                        print_mac(mac2, mgmt->bssid),
2845                        (unsigned long long)rx_timestamp,
2846                        (unsigned long long)beacon_timestamp,
2847                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2848                        jiffies);
2849 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2850                 if (beacon_timestamp > rx_timestamp) {
2851 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2852                         if (net_ratelimit())
2853 #endif
2854                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2855                                        "local TSF - IBSS merge with BSSID %s\n",
2856                                        dev->name, print_mac(mac, mgmt->bssid));
2857                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2858                         ieee80211_ibss_add_sta(dev, NULL,
2859                                                mgmt->bssid, mgmt->sa);
2860                 }
2861         }
2862
2863         ieee80211_rx_bss_put(dev, bss);
2864 }
2865
2866
2867 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2868                                          struct ieee80211_mgmt *mgmt,
2869                                          size_t len,
2870                                          struct ieee80211_rx_status *rx_status)
2871 {
2872         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2873 }
2874
2875
2876 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2877                                      struct ieee80211_mgmt *mgmt,
2878                                      size_t len,
2879                                      struct ieee80211_rx_status *rx_status)
2880 {
2881         struct ieee80211_sub_if_data *sdata;
2882         struct ieee80211_if_sta *ifsta;
2883         size_t baselen;
2884         struct ieee802_11_elems elems;
2885         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2886         struct ieee80211_conf *conf = &local->hw.conf;
2887         u32 changed = 0;
2888
2889         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2890
2891         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2892         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2893                 return;
2894         ifsta = &sdata->u.sta;
2895
2896         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2897             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2898                 return;
2899
2900         /* Process beacon from the current BSS */
2901         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2902         if (baselen > len)
2903                 return;
2904
2905         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2906
2907         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2908                                  elems.wmm_param_len);
2909
2910         /* Do not send changes to driver if we are scanning. This removes
2911          * requirement that driver's bss_info_changed function needs to be
2912          * atomic. */
2913         if (local->sta_sw_scanning || local->sta_hw_scanning)
2914                 return;
2915
2916         if (elems.erp_info && elems.erp_info_len >= 1)
2917                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2918         else {
2919                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2920                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2921                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2922         }
2923
2924         if (elems.ht_cap_elem && elems.ht_info_elem &&
2925             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2926                 struct ieee80211_ht_bss_info bss_info;
2927
2928                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2929                                 (struct ieee80211_ht_addt_info *)
2930                                 elems.ht_info_elem, &bss_info);
2931                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2932                                                &bss_info);
2933         }
2934
2935         ieee80211_bss_info_change_notify(sdata, changed);
2936 }
2937
2938
2939 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2940                                         struct ieee80211_if_sta *ifsta,
2941                                         struct ieee80211_mgmt *mgmt,
2942                                         size_t len,
2943                                         struct ieee80211_rx_status *rx_status)
2944 {
2945         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2946         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2947         int tx_last_beacon;
2948         struct sk_buff *skb;
2949         struct ieee80211_mgmt *resp;
2950         u8 *pos, *end;
2951         DECLARE_MAC_BUF(mac);
2952 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2953         DECLARE_MAC_BUF(mac2);
2954         DECLARE_MAC_BUF(mac3);
2955 #endif
2956
2957         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2958             ifsta->state != IEEE80211_IBSS_JOINED ||
2959             len < 24 + 2 || !ifsta->probe_resp)
2960                 return;
2961
2962         if (local->ops->tx_last_beacon)
2963                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2964         else
2965                 tx_last_beacon = 1;
2966
2967 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2968         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2969                "%s (tx_last_beacon=%d)\n",
2970                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2971                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2972 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2973
2974         if (!tx_last_beacon)
2975                 return;
2976
2977         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2978             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2979                 return;
2980
2981         end = ((u8 *) mgmt) + len;
2982         pos = mgmt->u.probe_req.variable;
2983         if (pos[0] != WLAN_EID_SSID ||
2984             pos + 2 + pos[1] > end) {
2985                 if (net_ratelimit()) {
2986                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2987                                "from %s\n",
2988                                dev->name, print_mac(mac, mgmt->sa));
2989                 }
2990                 return;
2991         }
2992         if (pos[1] != 0 &&
2993             (pos[1] != ifsta->ssid_len ||
2994              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2995                 /* Ignore ProbeReq for foreign SSID */
2996                 return;
2997         }
2998
2999         /* Reply with ProbeResp */
3000         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3001         if (!skb)
3002                 return;
3003
3004         resp = (struct ieee80211_mgmt *) skb->data;
3005         memcpy(resp->da, mgmt->sa, ETH_ALEN);
3006 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3007         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3008                dev->name, print_mac(mac, resp->da));
3009 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3010         ieee80211_sta_tx(dev, skb, 0);
3011 }
3012
3013 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3014                                      struct ieee80211_if_sta *ifsta,
3015                                      struct ieee80211_mgmt *mgmt,
3016                                      size_t len,
3017                                      struct ieee80211_rx_status *rx_status)
3018 {
3019         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3020
3021         if (len < IEEE80211_MIN_ACTION_SIZE)
3022                 return;
3023
3024         switch (mgmt->u.action.category) {
3025         case WLAN_CATEGORY_BACK:
3026                 switch (mgmt->u.action.u.addba_req.action_code) {
3027                 case WLAN_ACTION_ADDBA_REQ:
3028                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3029                                    sizeof(mgmt->u.action.u.addba_req)))
3030                                 break;
3031                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3032                         break;
3033                 case WLAN_ACTION_ADDBA_RESP:
3034                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3035                                    sizeof(mgmt->u.action.u.addba_resp)))
3036                                 break;
3037                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3038                         break;
3039                 case WLAN_ACTION_DELBA:
3040                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3041                                    sizeof(mgmt->u.action.u.delba)))
3042                                 break;
3043                         ieee80211_sta_process_delba(dev, mgmt, len);
3044                         break;
3045                 default:
3046                         if (net_ratelimit())
3047                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3048                                         dev->name);
3049                         break;
3050                 }
3051                 break;
3052         case PLINK_CATEGORY:
3053                 if (ieee80211_vif_is_mesh(&sdata->vif))
3054                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3055                 break;
3056         case MESH_PATH_SEL_CATEGORY:
3057                 if (ieee80211_vif_is_mesh(&sdata->vif))
3058                         mesh_rx_path_sel_frame(dev, mgmt, len);
3059                 break;
3060         default:
3061                 if (net_ratelimit())
3062                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
3063                         "category=%d\n", dev->name, mgmt->u.action.category);
3064                 break;
3065         }
3066 }
3067
3068 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3069                            struct ieee80211_rx_status *rx_status)
3070 {
3071         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3072         struct ieee80211_sub_if_data *sdata;
3073         struct ieee80211_if_sta *ifsta;
3074         struct ieee80211_mgmt *mgmt;
3075         u16 fc;
3076
3077         if (skb->len < 24)
3078                 goto fail;
3079
3080         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3081         ifsta = &sdata->u.sta;
3082
3083         mgmt = (struct ieee80211_mgmt *) skb->data;
3084         fc = le16_to_cpu(mgmt->frame_control);
3085
3086         switch (fc & IEEE80211_FCTL_STYPE) {
3087         case IEEE80211_STYPE_PROBE_REQ:
3088         case IEEE80211_STYPE_PROBE_RESP:
3089         case IEEE80211_STYPE_BEACON:
3090         case IEEE80211_STYPE_ACTION:
3091                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3092         case IEEE80211_STYPE_AUTH:
3093         case IEEE80211_STYPE_ASSOC_RESP:
3094         case IEEE80211_STYPE_REASSOC_RESP:
3095         case IEEE80211_STYPE_DEAUTH:
3096         case IEEE80211_STYPE_DISASSOC:
3097                 skb_queue_tail(&ifsta->skb_queue, skb);
3098                 queue_work(local->hw.workqueue, &ifsta->work);
3099                 return;
3100         default:
3101                 printk(KERN_DEBUG "%s: received unknown management frame - "
3102                        "stype=%d\n", dev->name,
3103                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3104                 break;
3105         }
3106
3107  fail:
3108         kfree_skb(skb);
3109 }
3110
3111
3112 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3113                                          struct sk_buff *skb)
3114 {
3115         struct ieee80211_rx_status *rx_status;
3116         struct ieee80211_sub_if_data *sdata;
3117         struct ieee80211_if_sta *ifsta;
3118         struct ieee80211_mgmt *mgmt;
3119         u16 fc;
3120
3121         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3122         ifsta = &sdata->u.sta;
3123
3124         rx_status = (struct ieee80211_rx_status *) skb->cb;
3125         mgmt = (struct ieee80211_mgmt *) skb->data;
3126         fc = le16_to_cpu(mgmt->frame_control);
3127
3128         switch (fc & IEEE80211_FCTL_STYPE) {
3129         case IEEE80211_STYPE_PROBE_REQ:
3130                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3131                                             rx_status);
3132                 break;
3133         case IEEE80211_STYPE_PROBE_RESP:
3134                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3135                 break;
3136         case IEEE80211_STYPE_BEACON:
3137                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3138                 break;
3139         case IEEE80211_STYPE_AUTH:
3140                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3141                 break;
3142         case IEEE80211_STYPE_ASSOC_RESP:
3143                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3144                 break;
3145         case IEEE80211_STYPE_REASSOC_RESP:
3146                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3147                 break;
3148         case IEEE80211_STYPE_DEAUTH:
3149                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3150                 break;
3151         case IEEE80211_STYPE_DISASSOC:
3152                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3153                 break;
3154         case IEEE80211_STYPE_ACTION:
3155                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3156                 break;
3157         }
3158
3159         kfree_skb(skb);
3160 }
3161
3162
3163 ieee80211_rx_result
3164 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3165                       struct ieee80211_rx_status *rx_status)
3166 {
3167         struct ieee80211_mgmt *mgmt;
3168         u16 fc;
3169
3170         if (skb->len < 2)
3171                 return RX_DROP_UNUSABLE;
3172
3173         mgmt = (struct ieee80211_mgmt *) skb->data;
3174         fc = le16_to_cpu(mgmt->frame_control);
3175
3176         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3177                 return RX_CONTINUE;
3178
3179         if (skb->len < 24)
3180                 return RX_DROP_MONITOR;
3181
3182         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3183                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3184                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3185                                                      skb->len, rx_status);
3186                         dev_kfree_skb(skb);
3187                         return RX_QUEUED;
3188                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3189                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3190                                                  rx_status);
3191                         dev_kfree_skb(skb);
3192                         return RX_QUEUED;
3193                 }
3194         }
3195         return RX_CONTINUE;
3196 }
3197
3198
3199 static int ieee80211_sta_active_ibss(struct net_device *dev)
3200 {
3201         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3202         int active = 0;
3203         struct sta_info *sta;
3204         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3205
3206         rcu_read_lock();
3207
3208         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3209                 if (sta->sdata == sdata &&
3210                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3211                                jiffies)) {
3212                         active++;
3213                         break;
3214                 }
3215         }
3216
3217         rcu_read_unlock();
3218
3219         return active;
3220 }
3221
3222
3223 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3224 {
3225         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3226         struct sta_info *sta, *tmp;
3227         LIST_HEAD(tmp_list);
3228         DECLARE_MAC_BUF(mac);
3229         unsigned long flags;
3230
3231         spin_lock_irqsave(&local->sta_lock, flags);
3232         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3233                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3234                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3235                                dev->name, print_mac(mac, sta->addr));
3236                         __sta_info_unlink(&sta);
3237                         if (sta)
3238                                 list_add(&sta->list, &tmp_list);
3239                 }
3240         spin_unlock_irqrestore(&local->sta_lock, flags);
3241
3242         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3243                 sta_info_destroy(sta);
3244 }
3245
3246
3247 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3248                                      struct ieee80211_if_sta *ifsta)
3249 {
3250         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3251
3252         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3253         if (ieee80211_sta_active_ibss(dev))
3254                 return;
3255
3256         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3257                "IBSS networks with same SSID (merge)\n", dev->name);
3258         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3259 }
3260
3261
3262 #ifdef CONFIG_MAC80211_MESH
3263 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3264                            struct ieee80211_if_sta *ifsta)
3265 {
3266         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3267         bool free_plinks;
3268
3269         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3270         mesh_path_expire(dev);
3271
3272         free_plinks = mesh_plink_availables(sdata);
3273         if (free_plinks != sdata->u.sta.accepting_plinks)
3274                 ieee80211_if_config_beacon(dev);
3275
3276         mod_timer(&ifsta->timer, jiffies +
3277                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3278 }
3279
3280
3281 void ieee80211_start_mesh(struct net_device *dev)
3282 {
3283         struct ieee80211_if_sta *ifsta;
3284         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3285         ifsta = &sdata->u.sta;
3286         ifsta->state = IEEE80211_MESH_UP;
3287         ieee80211_sta_timer((unsigned long)sdata);
3288 }
3289 #endif
3290
3291
3292 void ieee80211_sta_timer(unsigned long data)
3293 {
3294         struct ieee80211_sub_if_data *sdata =
3295                 (struct ieee80211_sub_if_data *) data;
3296         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3297         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3298
3299         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3300         queue_work(local->hw.workqueue, &ifsta->work);
3301 }
3302
3303 void ieee80211_sta_work(struct work_struct *work)
3304 {
3305         struct ieee80211_sub_if_data *sdata =
3306                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3307         struct net_device *dev = sdata->dev;
3308         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3309         struct ieee80211_if_sta *ifsta;
3310         struct sk_buff *skb;
3311
3312         if (!netif_running(dev))
3313                 return;
3314
3315         if (local->sta_sw_scanning || local->sta_hw_scanning)
3316                 return;
3317
3318         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3319             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3320             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3321                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3322                        "(type=%d)\n", dev->name, sdata->vif.type);
3323                 return;
3324         }
3325         ifsta = &sdata->u.sta;
3326
3327         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3328                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3329
3330 #ifdef CONFIG_MAC80211_MESH
3331         if (ifsta->preq_queue_len &&
3332             time_after(jiffies,
3333                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3334                 mesh_path_start_discovery(dev);
3335 #endif
3336
3337         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3338             ifsta->state != IEEE80211_ASSOCIATE &&
3339             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3340                 if (ifsta->scan_ssid_len)
3341                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3342                 else
3343                         ieee80211_sta_start_scan(dev, NULL, 0);
3344                 return;
3345         }
3346
3347         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3348                 if (ieee80211_sta_config_auth(dev, ifsta))
3349                         return;
3350                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3351         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3352                 return;
3353
3354         switch (ifsta->state) {
3355         case IEEE80211_DISABLED:
3356                 break;
3357         case IEEE80211_AUTHENTICATE:
3358                 ieee80211_authenticate(dev, ifsta);
3359                 break;
3360         case IEEE80211_ASSOCIATE:
3361                 ieee80211_associate(dev, ifsta);
3362                 break;
3363         case IEEE80211_ASSOCIATED:
3364                 ieee80211_associated(dev, ifsta);
3365                 break;
3366         case IEEE80211_IBSS_SEARCH:
3367                 ieee80211_sta_find_ibss(dev, ifsta);
3368                 break;
3369         case IEEE80211_IBSS_JOINED:
3370                 ieee80211_sta_merge_ibss(dev, ifsta);
3371                 break;
3372 #ifdef CONFIG_MAC80211_MESH
3373         case IEEE80211_MESH_UP:
3374                 ieee80211_mesh_housekeeping(dev, ifsta);
3375                 break;
3376 #endif
3377         default:
3378                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3379                        ifsta->state);
3380                 break;
3381         }
3382
3383         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3384                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3385                        "mixed-cell disabled - disassociate\n", dev->name);
3386
3387                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3388                 ieee80211_set_disassoc(dev, ifsta, 0);
3389         }
3390 }
3391
3392
3393 static void ieee80211_sta_reset_auth(struct net_device *dev,
3394                                      struct ieee80211_if_sta *ifsta)
3395 {
3396         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3397
3398         if (local->ops->reset_tsf) {
3399                 /* Reset own TSF to allow time synchronization work. */
3400                 local->ops->reset_tsf(local_to_hw(local));
3401         }
3402
3403         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3404
3405
3406         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3407                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3408         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3409                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3410         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3411                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3412         else
3413                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3414         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3415                ifsta->auth_alg);
3416         ifsta->auth_transaction = -1;
3417         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3418         ifsta->auth_tries = ifsta->assoc_tries = 0;
3419         netif_carrier_off(dev);
3420 }
3421
3422
3423 void ieee80211_sta_req_auth(struct net_device *dev,
3424                             struct ieee80211_if_sta *ifsta)
3425 {
3426         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3427         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3428
3429         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3430                 return;
3431
3432         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3433                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3434             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3435                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3436                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3437                 queue_work(local->hw.workqueue, &ifsta->work);
3438         }
3439 }
3440
3441 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3442                                     const char *ssid, int ssid_len)
3443 {
3444         int tmp, hidden_ssid;
3445
3446         if (ssid_len == ifsta->ssid_len &&
3447             !memcmp(ifsta->ssid, ssid, ssid_len))
3448                 return 1;
3449
3450         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3451                 return 0;
3452
3453         hidden_ssid = 1;
3454         tmp = ssid_len;
3455         while (tmp--) {
3456                 if (ssid[tmp] != '\0') {
3457                         hidden_ssid = 0;
3458                         break;
3459                 }
3460         }
3461
3462         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3463                 return 1;
3464
3465         if (ssid_len == 1 && ssid[0] == ' ')
3466                 return 1;
3467
3468         return 0;
3469 }
3470
3471 static int ieee80211_sta_config_auth(struct net_device *dev,
3472                                      struct ieee80211_if_sta *ifsta)
3473 {
3474         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3475         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3476         struct ieee80211_sta_bss *bss, *selected = NULL;
3477         int top_rssi = 0, freq;
3478
3479         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3480             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3481                 ifsta->state = IEEE80211_AUTHENTICATE;
3482                 ieee80211_sta_reset_auth(dev, ifsta);
3483                 return 0;
3484         }
3485
3486         spin_lock_bh(&local->sta_bss_lock);
3487         freq = local->oper_channel->center_freq;
3488         list_for_each_entry(bss, &local->sta_bss_list, list) {
3489                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3490                         continue;
3491
3492                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3493                     !!sdata->default_key)
3494                         continue;
3495
3496                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3497                     bss->freq != freq)
3498                         continue;
3499
3500                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3501                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3502                         continue;
3503
3504                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3505                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3506                         continue;
3507
3508                 if (!selected || top_rssi < bss->signal) {
3509                         selected = bss;
3510                         top_rssi = bss->signal;
3511                 }
3512         }
3513         if (selected)
3514                 atomic_inc(&selected->users);
3515         spin_unlock_bh(&local->sta_bss_lock);
3516
3517         if (selected) {
3518                 ieee80211_set_freq(local, selected->freq);
3519                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3520                         ieee80211_sta_set_ssid(dev, selected->ssid,
3521                                                selected->ssid_len);
3522                 ieee80211_sta_set_bssid(dev, selected->bssid);
3523                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3524                 ieee80211_rx_bss_put(dev, selected);
3525                 ifsta->state = IEEE80211_AUTHENTICATE;
3526                 ieee80211_sta_reset_auth(dev, ifsta);
3527                 return 0;
3528         } else {
3529                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3530                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3531                                 ieee80211_sta_start_scan(dev, NULL, 0);
3532                         else
3533                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3534                                                          ifsta->ssid_len);
3535                         ifsta->state = IEEE80211_AUTHENTICATE;
3536                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3537                 } else
3538                         ifsta->state = IEEE80211_DISABLED;
3539         }
3540         return -1;
3541 }
3542
3543
3544 static int ieee80211_sta_create_ibss(struct net_device *dev,
3545                                      struct ieee80211_if_sta *ifsta)
3546 {
3547         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3548         struct ieee80211_sta_bss *bss;
3549         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3550         struct ieee80211_supported_band *sband;
3551         u8 bssid[ETH_ALEN], *pos;
3552         int i;
3553         DECLARE_MAC_BUF(mac);
3554
3555 #if 0
3556         /* Easier testing, use fixed BSSID. */
3557         memset(bssid, 0xfe, ETH_ALEN);
3558 #else
3559         /* Generate random, not broadcast, locally administered BSSID. Mix in
3560          * own MAC address to make sure that devices that do not have proper
3561          * random number generator get different BSSID. */
3562         get_random_bytes(bssid, ETH_ALEN);
3563         for (i = 0; i < ETH_ALEN; i++)
3564                 bssid[i] ^= dev->dev_addr[i];
3565         bssid[0] &= ~0x01;
3566         bssid[0] |= 0x02;
3567 #endif
3568
3569         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3570                dev->name, print_mac(mac, bssid));
3571
3572         bss = ieee80211_rx_bss_add(dev, bssid,
3573                                    local->hw.conf.channel->center_freq,
3574                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3575         if (!bss)
3576                 return -ENOMEM;
3577
3578         bss->band = local->hw.conf.channel->band;
3579         sband = local->hw.wiphy->bands[bss->band];
3580
3581         if (local->hw.conf.beacon_int == 0)
3582                 local->hw.conf.beacon_int = 10000;
3583         bss->beacon_int = local->hw.conf.beacon_int;
3584         bss->last_update = jiffies;
3585         bss->capability = WLAN_CAPABILITY_IBSS;
3586
3587         if (sdata->default_key)
3588                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3589         else
3590                 sdata->drop_unencrypted = 0;
3591
3592         bss->supp_rates_len = sband->n_bitrates;
3593         pos = bss->supp_rates;
3594         for (i = 0; i < sband->n_bitrates; i++) {
3595                 int rate = sband->bitrates[i].bitrate;
3596                 *pos++ = (u8) (rate / 5);
3597         }
3598
3599         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3600 }
3601
3602
3603 static int ieee80211_sta_find_ibss(struct net_device *dev,
3604                                    struct ieee80211_if_sta *ifsta)
3605 {
3606         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3607         struct ieee80211_sta_bss *bss;
3608         int found = 0;
3609         u8 bssid[ETH_ALEN];
3610         int active_ibss;
3611         DECLARE_MAC_BUF(mac);
3612         DECLARE_MAC_BUF(mac2);
3613
3614         if (ifsta->ssid_len == 0)
3615                 return -EINVAL;
3616
3617         active_ibss = ieee80211_sta_active_ibss(dev);
3618 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3619         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3620                dev->name, active_ibss);
3621 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3622         spin_lock_bh(&local->sta_bss_lock);
3623         list_for_each_entry(bss, &local->sta_bss_list, list) {
3624                 if (ifsta->ssid_len != bss->ssid_len ||
3625                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3626                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3627                         continue;
3628 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3629                 printk(KERN_DEBUG "   bssid=%s found\n",
3630                        print_mac(mac, bss->bssid));
3631 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3632                 memcpy(bssid, bss->bssid, ETH_ALEN);
3633                 found = 1;
3634                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3635                         break;
3636         }
3637         spin_unlock_bh(&local->sta_bss_lock);
3638
3639 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3640         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3641                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3642 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3643         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3644             (bss = ieee80211_rx_bss_get(dev, bssid,
3645                                         local->hw.conf.channel->center_freq,
3646                                         ifsta->ssid, ifsta->ssid_len))) {
3647                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3648                        " based on configured SSID\n",
3649                        dev->name, print_mac(mac, bssid));
3650                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3651         }
3652 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3653         printk(KERN_DEBUG "   did not try to join ibss\n");
3654 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3655
3656         /* Selected IBSS not found in current scan results - try to scan */
3657         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3658             !ieee80211_sta_active_ibss(dev)) {
3659                 mod_timer(&ifsta->timer, jiffies +
3660                                       IEEE80211_IBSS_MERGE_INTERVAL);
3661         } else if (time_after(jiffies, local->last_scan_completed +
3662                               IEEE80211_SCAN_INTERVAL)) {
3663                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3664                        "join\n", dev->name);
3665                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3666                                               ifsta->ssid_len);
3667         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3668                 int interval = IEEE80211_SCAN_INTERVAL;
3669
3670                 if (time_after(jiffies, ifsta->ibss_join_req +
3671                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3672                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3673                             (!(local->oper_channel->flags &
3674                                         IEEE80211_CHAN_NO_IBSS)))
3675                                 return ieee80211_sta_create_ibss(dev, ifsta);
3676                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3677                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3678                                        " %d MHz\n", dev->name,
3679                                        local->hw.conf.channel->center_freq);
3680                         }
3681
3682                         /* No IBSS found - decrease scan interval and continue
3683                          * scanning. */
3684                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3685                 }
3686
3687                 ifsta->state = IEEE80211_IBSS_SEARCH;
3688                 mod_timer(&ifsta->timer, jiffies + interval);
3689                 return 0;
3690         }
3691
3692         return 0;
3693 }
3694
3695
3696 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3697 {
3698         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3699         struct ieee80211_if_sta *ifsta;
3700
3701         if (len > IEEE80211_MAX_SSID_LEN)
3702                 return -EINVAL;
3703
3704         ifsta = &sdata->u.sta;
3705
3706         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3707                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3708         memcpy(ifsta->ssid, ssid, len);
3709         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3710         ifsta->ssid_len = len;
3711
3712         if (len)
3713                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3714         else
3715                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3716         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3717             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3718                 ifsta->ibss_join_req = jiffies;
3719                 ifsta->state = IEEE80211_IBSS_SEARCH;
3720                 return ieee80211_sta_find_ibss(dev, ifsta);
3721         }
3722         return 0;
3723 }
3724
3725
3726 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3727 {
3728         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3729         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3730         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3731         *len = ifsta->ssid_len;
3732         return 0;
3733 }
3734
3735
3736 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3737 {
3738         struct ieee80211_sub_if_data *sdata;
3739         struct ieee80211_if_sta *ifsta;
3740         int res;
3741
3742         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3743         ifsta = &sdata->u.sta;
3744
3745         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3746                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3747                 res = ieee80211_if_config(dev);
3748                 if (res) {
3749                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3750                                "the low-level driver\n", dev->name);
3751                         return res;
3752                 }
3753         }
3754
3755         if (is_valid_ether_addr(bssid))
3756                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3757         else
3758                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3759
3760         return 0;
3761 }
3762
3763
3764 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3765                                     struct ieee80211_sub_if_data *sdata,
3766                                     int powersave)
3767 {
3768         struct sk_buff *skb;
3769         struct ieee80211_hdr *nullfunc;
3770         u16 fc;
3771
3772         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3773         if (!skb) {
3774                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3775                        "frame\n", sdata->dev->name);
3776                 return;
3777         }
3778         skb_reserve(skb, local->hw.extra_tx_headroom);
3779
3780         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3781         memset(nullfunc, 0, 24);
3782         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3783              IEEE80211_FCTL_TODS;
3784         if (powersave)
3785                 fc |= IEEE80211_FCTL_PM;
3786         nullfunc->frame_control = cpu_to_le16(fc);
3787         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3788         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3789         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3790
3791         ieee80211_sta_tx(sdata->dev, skb, 0);
3792 }
3793
3794
3795 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3796 {
3797         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3798             ieee80211_vif_is_mesh(&sdata->vif))
3799                 ieee80211_sta_timer((unsigned long)sdata);
3800 }
3801
3802 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3803 {
3804         struct ieee80211_local *local = hw_to_local(hw);
3805         struct net_device *dev = local->scan_dev;
3806         struct ieee80211_sub_if_data *sdata;
3807         union iwreq_data wrqu;
3808
3809         local->last_scan_completed = jiffies;
3810         memset(&wrqu, 0, sizeof(wrqu));
3811         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3812
3813         if (local->sta_hw_scanning) {
3814                 local->sta_hw_scanning = 0;
3815                 if (ieee80211_hw_config(local))
3816                         printk(KERN_DEBUG "%s: failed to restore operational "
3817                                "channel after scan\n", dev->name);
3818                 /* Restart STA timer for HW scan case */
3819                 rcu_read_lock();
3820                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3821                         ieee80211_restart_sta_timer(sdata);
3822                 rcu_read_unlock();
3823
3824                 goto done;
3825         }
3826
3827         local->sta_sw_scanning = 0;
3828         if (ieee80211_hw_config(local))
3829                 printk(KERN_DEBUG "%s: failed to restore operational "
3830                        "channel after scan\n", dev->name);
3831
3832
3833         netif_tx_lock_bh(local->mdev);
3834         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3835         local->ops->configure_filter(local_to_hw(local),
3836                                      FIF_BCN_PRBRESP_PROMISC,
3837                                      &local->filter_flags,
3838                                      local->mdev->mc_count,
3839                                      local->mdev->mc_list);
3840
3841         netif_tx_unlock_bh(local->mdev);
3842
3843         rcu_read_lock();
3844         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3845
3846                 /* No need to wake the master device. */
3847                 if (sdata->dev == local->mdev)
3848                         continue;
3849
3850                 /* Tell AP we're back */
3851                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3852                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3853                         ieee80211_send_nullfunc(local, sdata, 0);
3854
3855                 ieee80211_restart_sta_timer(sdata);
3856
3857                 netif_wake_queue(sdata->dev);
3858         }
3859         rcu_read_unlock();
3860
3861 done:
3862         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3863         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3864                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3865                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3866                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3867                     !ieee80211_sta_active_ibss(dev)))
3868                         ieee80211_sta_find_ibss(dev, ifsta);
3869         }
3870 }
3871 EXPORT_SYMBOL(ieee80211_scan_completed);
3872
3873 void ieee80211_sta_scan_work(struct work_struct *work)
3874 {
3875         struct ieee80211_local *local =
3876                 container_of(work, struct ieee80211_local, scan_work.work);
3877         struct net_device *dev = local->scan_dev;
3878         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3879         struct ieee80211_supported_band *sband;
3880         struct ieee80211_channel *chan;
3881         int skip;
3882         unsigned long next_delay = 0;
3883
3884         if (!local->sta_sw_scanning)
3885                 return;
3886
3887         switch (local->scan_state) {
3888         case SCAN_SET_CHANNEL:
3889                 /*
3890                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3891                  * after we successfully scanned the last channel of the last
3892                  * band (and the last band is supported by the hw)
3893                  */
3894                 if (local->scan_band < IEEE80211_NUM_BANDS)
3895                         sband = local->hw.wiphy->bands[local->scan_band];
3896                 else
3897                         sband = NULL;
3898
3899                 /*
3900                  * If we are at an unsupported band and have more bands
3901                  * left to scan, advance to the next supported one.
3902                  */
3903                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3904                         local->scan_band++;
3905                         sband = local->hw.wiphy->bands[local->scan_band];
3906                         local->scan_channel_idx = 0;
3907                 }
3908
3909                 /* if no more bands/channels left, complete scan */
3910                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3911                         ieee80211_scan_completed(local_to_hw(local));
3912                         return;
3913                 }
3914                 skip = 0;
3915                 chan = &sband->channels[local->scan_channel_idx];
3916
3917                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3918                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3919                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3920                         skip = 1;
3921
3922                 if (!skip) {
3923                         local->scan_channel = chan;
3924                         if (ieee80211_hw_config(local)) {
3925                                 printk(KERN_DEBUG "%s: failed to set freq to "
3926                                        "%d MHz for scan\n", dev->name,
3927                                        chan->center_freq);
3928                                 skip = 1;
3929                         }
3930                 }
3931
3932                 /* advance state machine to next channel/band */
3933                 local->scan_channel_idx++;
3934                 if (local->scan_channel_idx >= sband->n_channels) {
3935                         /*
3936                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3937                          * we'll catch that case above and complete the scan
3938                          * if that is the case.
3939                          */
3940                         local->scan_band++;
3941                         local->scan_channel_idx = 0;
3942                 }
3943
3944                 if (skip)
3945                         break;
3946
3947                 next_delay = IEEE80211_PROBE_DELAY +
3948                              usecs_to_jiffies(local->hw.channel_change_time);
3949                 local->scan_state = SCAN_SEND_PROBE;
3950                 break;
3951         case SCAN_SEND_PROBE:
3952                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3953                 local->scan_state = SCAN_SET_CHANNEL;
3954
3955                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3956                         break;
3957                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3958                                          local->scan_ssid_len);
3959                 next_delay = IEEE80211_CHANNEL_TIME;
3960                 break;
3961         }
3962
3963         if (local->sta_sw_scanning)
3964                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3965                                    next_delay);
3966 }
3967
3968
3969 static int ieee80211_sta_start_scan(struct net_device *dev,
3970                                     u8 *ssid, size_t ssid_len)
3971 {
3972         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3973         struct ieee80211_sub_if_data *sdata;
3974
3975         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3976                 return -EINVAL;
3977
3978         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3979          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3980          * BSSID: MACAddress
3981          * SSID
3982          * ScanType: ACTIVE, PASSIVE
3983          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3984          *    a Probe frame during active scanning
3985          * ChannelList
3986          * MinChannelTime (>= ProbeDelay), in TU
3987          * MaxChannelTime: (>= MinChannelTime), in TU
3988          */
3989
3990          /* MLME-SCAN.confirm
3991           * BSSDescriptionSet
3992           * ResultCode: SUCCESS, INVALID_PARAMETERS
3993          */
3994
3995         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3996                 if (local->scan_dev == dev)
3997                         return 0;
3998                 return -EBUSY;
3999         }
4000
4001         if (local->ops->hw_scan) {
4002                 int rc = local->ops->hw_scan(local_to_hw(local),
4003                                              ssid, ssid_len);
4004                 if (!rc) {
4005                         local->sta_hw_scanning = 1;
4006                         local->scan_dev = dev;
4007                 }
4008                 return rc;
4009         }
4010
4011         local->sta_sw_scanning = 1;
4012
4013         rcu_read_lock();
4014         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4015
4016                 /* Don't stop the master interface, otherwise we can't transmit
4017                  * probes! */
4018                 if (sdata->dev == local->mdev)
4019                         continue;
4020
4021                 netif_stop_queue(sdata->dev);
4022                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4023                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4024                         ieee80211_send_nullfunc(local, sdata, 1);
4025         }
4026         rcu_read_unlock();
4027
4028         if (ssid) {
4029                 local->scan_ssid_len = ssid_len;
4030                 memcpy(local->scan_ssid, ssid, ssid_len);
4031         } else
4032                 local->scan_ssid_len = 0;
4033         local->scan_state = SCAN_SET_CHANNEL;
4034         local->scan_channel_idx = 0;
4035         local->scan_band = IEEE80211_BAND_2GHZ;
4036         local->scan_dev = dev;
4037
4038         netif_tx_lock_bh(local->mdev);
4039         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4040         local->ops->configure_filter(local_to_hw(local),
4041                                      FIF_BCN_PRBRESP_PROMISC,
4042                                      &local->filter_flags,
4043                                      local->mdev->mc_count,
4044                                      local->mdev->mc_list);
4045         netif_tx_unlock_bh(local->mdev);
4046
4047         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4048         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4049                            IEEE80211_CHANNEL_TIME);
4050
4051         return 0;
4052 }
4053
4054
4055 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4056 {
4057         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4058         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4059         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4060
4061         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4062                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4063
4064         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4065                 if (local->scan_dev == dev)
4066                         return 0;
4067                 return -EBUSY;
4068         }
4069
4070         ifsta->scan_ssid_len = ssid_len;
4071         if (ssid_len)
4072                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4073         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4074         queue_work(local->hw.workqueue, &ifsta->work);
4075         return 0;
4076 }
4077
4078 static char *
4079 ieee80211_sta_scan_result(struct net_device *dev,
4080                           struct ieee80211_sta_bss *bss,
4081                           char *current_ev, char *end_buf)
4082 {
4083         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4084         struct iw_event iwe;
4085
4086         if (time_after(jiffies,
4087                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4088                 return current_ev;
4089
4090         memset(&iwe, 0, sizeof(iwe));
4091         iwe.cmd = SIOCGIWAP;
4092         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4093         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4094         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4095                                           IW_EV_ADDR_LEN);
4096
4097         memset(&iwe, 0, sizeof(iwe));
4098         iwe.cmd = SIOCGIWESSID;
4099         if (bss_mesh_cfg(bss)) {
4100                 iwe.u.data.length = bss_mesh_id_len(bss);
4101                 iwe.u.data.flags = 1;
4102                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4103                                                   bss_mesh_id(bss));
4104         } else {
4105                 iwe.u.data.length = bss->ssid_len;
4106                 iwe.u.data.flags = 1;
4107                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4108                                                   bss->ssid);
4109         }
4110
4111         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4112             || bss_mesh_cfg(bss)) {
4113                 memset(&iwe, 0, sizeof(iwe));
4114                 iwe.cmd = SIOCGIWMODE;
4115                 if (bss_mesh_cfg(bss))
4116                         iwe.u.mode = IW_MODE_MESH;
4117                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4118                         iwe.u.mode = IW_MODE_MASTER;
4119                 else
4120                         iwe.u.mode = IW_MODE_ADHOC;
4121                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4122                                                   IW_EV_UINT_LEN);
4123         }
4124
4125         memset(&iwe, 0, sizeof(iwe));
4126         iwe.cmd = SIOCGIWFREQ;
4127         iwe.u.freq.m = bss->freq;
4128         iwe.u.freq.e = 6;
4129         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4130                                           IW_EV_FREQ_LEN);
4131
4132         memset(&iwe, 0, sizeof(iwe));
4133         iwe.cmd = SIOCGIWFREQ;
4134         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4135         iwe.u.freq.e = 0;
4136         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4137                                           IW_EV_FREQ_LEN);
4138
4139         memset(&iwe, 0, sizeof(iwe));
4140         iwe.cmd = IWEVQUAL;
4141         iwe.u.qual.qual = bss->qual;
4142         iwe.u.qual.level = bss->signal;
4143         iwe.u.qual.noise = bss->noise;
4144         iwe.u.qual.updated = local->wstats_flags;
4145         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4146                                           IW_EV_QUAL_LEN);
4147
4148         memset(&iwe, 0, sizeof(iwe));
4149         iwe.cmd = SIOCGIWENCODE;
4150         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4151                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4152         else
4153                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4154         iwe.u.data.length = 0;
4155         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4156
4157         if (bss && bss->wpa_ie) {
4158                 memset(&iwe, 0, sizeof(iwe));
4159                 iwe.cmd = IWEVGENIE;
4160                 iwe.u.data.length = bss->wpa_ie_len;
4161                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4162                                                   bss->wpa_ie);
4163         }
4164
4165         if (bss && bss->rsn_ie) {
4166                 memset(&iwe, 0, sizeof(iwe));
4167                 iwe.cmd = IWEVGENIE;
4168                 iwe.u.data.length = bss->rsn_ie_len;
4169                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4170                                                   bss->rsn_ie);
4171         }
4172
4173         if (bss && bss->ht_ie) {
4174                 memset(&iwe, 0, sizeof(iwe));
4175                 iwe.cmd = IWEVGENIE;
4176                 iwe.u.data.length = bss->ht_ie_len;
4177                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4178                                                   bss->ht_ie);
4179         }
4180
4181         if (bss && bss->supp_rates_len > 0) {
4182                 /* display all supported rates in readable format */
4183                 char *p = current_ev + IW_EV_LCP_LEN;
4184                 int i;
4185
4186                 memset(&iwe, 0, sizeof(iwe));
4187                 iwe.cmd = SIOCGIWRATE;
4188                 /* Those two flags are ignored... */
4189                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4190
4191                 for (i = 0; i < bss->supp_rates_len; i++) {
4192                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4193                                                         0x7f) * 500000);
4194                         p = iwe_stream_add_value(current_ev, p,
4195                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4196                 }
4197                 current_ev = p;
4198         }
4199
4200         if (bss) {
4201                 char *buf;
4202                 buf = kmalloc(30, GFP_ATOMIC);
4203                 if (buf) {
4204                         memset(&iwe, 0, sizeof(iwe));
4205                         iwe.cmd = IWEVCUSTOM;
4206                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4207                         iwe.u.data.length = strlen(buf);
4208                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4209                                                           &iwe, buf);
4210                         kfree(buf);
4211                 }
4212         }
4213
4214         if (bss_mesh_cfg(bss)) {
4215                 char *buf;
4216                 u8 *cfg = bss_mesh_cfg(bss);
4217                 buf = kmalloc(50, GFP_ATOMIC);
4218                 if (buf) {
4219                         memset(&iwe, 0, sizeof(iwe));
4220                         iwe.cmd = IWEVCUSTOM;
4221                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4222                         iwe.u.data.length = strlen(buf);
4223                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4224                                                           &iwe, buf);
4225                         sprintf(buf, "Path Selection Protocol ID: "
4226                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4227                                                         cfg[4]);
4228                         iwe.u.data.length = strlen(buf);
4229                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4230                                                           &iwe, buf);
4231                         sprintf(buf, "Path Selection Metric ID: "
4232                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4233                                                         cfg[8]);
4234                         iwe.u.data.length = strlen(buf);
4235                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4236                                                           &iwe, buf);
4237                         sprintf(buf, "Congestion Control Mode ID: "
4238                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4239                                                         cfg[11], cfg[12]);
4240                         iwe.u.data.length = strlen(buf);
4241                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4242                                                           &iwe, buf);
4243                         sprintf(buf, "Channel Precedence: "
4244                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4245                                                         cfg[15], cfg[16]);
4246                         iwe.u.data.length = strlen(buf);
4247                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4248                                                           &iwe, buf);
4249                         kfree(buf);
4250                 }
4251         }
4252
4253         return current_ev;
4254 }
4255
4256
4257 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4258 {
4259         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4260         char *current_ev = buf;
4261         char *end_buf = buf + len;
4262         struct ieee80211_sta_bss *bss;
4263
4264         spin_lock_bh(&local->sta_bss_lock);
4265         list_for_each_entry(bss, &local->sta_bss_list, list) {
4266                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4267                         spin_unlock_bh(&local->sta_bss_lock);
4268                         return -E2BIG;
4269                 }
4270                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4271                                                        end_buf);
4272         }
4273         spin_unlock_bh(&local->sta_bss_lock);
4274         return current_ev - buf;
4275 }
4276
4277
4278 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4279 {
4280         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4281         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4282
4283         kfree(ifsta->extra_ie);
4284         if (len == 0) {
4285                 ifsta->extra_ie = NULL;
4286                 ifsta->extra_ie_len = 0;
4287                 return 0;
4288         }
4289         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4290         if (!ifsta->extra_ie) {
4291                 ifsta->extra_ie_len = 0;
4292                 return -ENOMEM;
4293         }
4294         memcpy(ifsta->extra_ie, ie, len);
4295         ifsta->extra_ie_len = len;
4296         return 0;
4297 }
4298
4299
4300 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4301                                         struct sk_buff *skb, u8 *bssid,
4302                                         u8 *addr)
4303 {
4304         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4305         struct sta_info *sta;
4306         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4307         DECLARE_MAC_BUF(mac);
4308
4309         /* TODO: Could consider removing the least recently used entry and
4310          * allow new one to be added. */
4311         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4312                 if (net_ratelimit()) {
4313                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4314                                "entry %s\n", dev->name, print_mac(mac, addr));
4315                 }
4316                 return NULL;
4317         }
4318
4319         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4320                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4321
4322         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4323         if (!sta)
4324                 return NULL;
4325
4326         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4327
4328         sta->supp_rates[local->hw.conf.channel->band] =
4329                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4330
4331         rate_control_rate_init(sta, local);
4332
4333         if (sta_info_insert(sta))
4334                 return NULL;
4335
4336         return sta;
4337 }
4338
4339
4340 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4341 {
4342         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4343         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4344
4345         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4346                dev->name, reason);
4347
4348         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4349             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4350                 return -EINVAL;
4351
4352         ieee80211_send_deauth(dev, ifsta, reason);
4353         ieee80211_set_disassoc(dev, ifsta, 1);
4354         return 0;
4355 }
4356
4357
4358 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4359 {
4360         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4361         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4362
4363         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4364                dev->name, reason);
4365
4366         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4367                 return -EINVAL;
4368
4369         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4370                 return -1;
4371
4372         ieee80211_send_disassoc(dev, ifsta, reason);
4373         ieee80211_set_disassoc(dev, ifsta, 0);
4374         return 0;
4375 }
4376
4377 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4378                           enum ieee80211_notification_types  notif_type)
4379 {
4380         struct ieee80211_local *local = hw_to_local(hw);
4381         struct ieee80211_sub_if_data *sdata;
4382
4383         switch (notif_type) {
4384         case IEEE80211_NOTIFY_RE_ASSOC:
4385                 rcu_read_lock();
4386                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4387
4388                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4389                                 ieee80211_sta_req_auth(sdata->dev,
4390                                                        &sdata->u.sta);
4391                         }
4392
4393                 }
4394                 rcu_read_unlock();
4395                 break;
4396         }
4397 }
4398 EXPORT_SYMBOL(ieee80211_notify_mac);