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 (7 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 /* mgmt header + 1 byte action code */
  63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  64
  65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  70
  71 /* next values represent the buffer size for A-MPDU frame.
  72  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  73 #define IEEE80211_MIN_AMPDU_BUF 0x8
  74 #define IEEE80211_MAX_AMPDU_BUF 0x40
  75
  76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  77                                      u8 *ssid, size_t ssid_len);
  78 static struct ieee80211_sta_bss *
  79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  80                      u8 *ssid, u8 ssid_len);
  81 static void ieee80211_rx_bss_put(struct net_device *dev,
  82                                  struct ieee80211_sta_bss *bss);
  83 static int ieee80211_sta_find_ibss(struct net_device *dev,
  84                                    struct ieee80211_if_sta *ifsta);
  85 static int ieee80211_sta_wep_configured(struct net_device *dev);
  86 static int ieee80211_sta_start_scan(struct net_device *dev,
  87                                     u8 *ssid, size_t ssid_len);
  88 static int ieee80211_sta_config_auth(struct net_device *dev,
  89                                      struct ieee80211_if_sta *ifsta);
  90 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                 case WLAN_EID_CHANNEL_SWITCH:
 208                         elems->ch_switch_elem = pos;
 209                         elems->ch_switch_elem_len = elen;
 210                         break;
 211                 case WLAN_EID_QUIET:
 212                         if (!elems->quiet_elem) {
 213                                 elems->quiet_elem = pos;
 214                                 elems->quiet_elem_len = elen;
 215                         }
 216                         elems->num_of_quiet_elem++;
 217                         break;
 218                 case WLAN_EID_COUNTRY:
 219                         elems->country_elem = pos;
 220                         elems->country_elem_len = elen;
 221                         break;
 222                 case WLAN_EID_PWR_CONSTRAINT:
 223                         elems->pwr_constr_elem = pos;
 224                         elems->pwr_constr_elem_len = elen;
 225                         break;
 226                 default:
 227                         break;
 228                 }
 229
 230                 left -= elen;
 231                 pos += elen;
 232         }
 233 }
 234
 235
 236 static int ecw2cw(int ecw)
 237 {
 238         return (1 << ecw) - 1;
 239 }
 240
 241
 242 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 243                                          struct ieee80211_sta_bss *bss,
 244                                          int ibss)
 245 {
 246         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 247         struct ieee80211_local *local = sdata->local;
 248         int i, have_higher_than_11mbit = 0;
 249
 250
 251         /* cf. IEEE 802.11 9.2.12 */
 252         for (i = 0; i < bss->supp_rates_len; i++)
 253                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 254                         have_higher_than_11mbit = 1;
 255
 256         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 257             have_higher_than_11mbit)
 258                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 259         else
 260                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 261
 262
 263         if (local->ops->conf_tx) {
 264                 struct ieee80211_tx_queue_params qparam;
 265
 266                 memset(&qparam, 0, sizeof(qparam));
 267
 268                 qparam.aifs = 2;
 269
 270                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 271                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 272                         qparam.cw_min = 31;
 273                 else
 274                         qparam.cw_min = 15;
 275
 276                 qparam.cw_max = 1023;
 277                 qparam.txop = 0;
 278
 279                 for (i = 0; i < local_to_hw(local)->queues; i++)
 280                         local->ops->conf_tx(local_to_hw(local), i, &qparam);
 281         }
 282 }
 283
 284 static void ieee80211_sta_wmm_params(struct net_device *dev,
 285                                      struct ieee80211_if_sta *ifsta,
 286                                      u8 *wmm_param, size_t wmm_param_len)
 287 {
 288         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 289         struct ieee80211_tx_queue_params params;
 290         size_t left;
 291         int count;
 292         u8 *pos;
 293
 294         if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
 295                 return;
 296
 297         if (!wmm_param)
 298                 return;
 299
 300         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 301                 return;
 302         count = wmm_param[6] & 0x0f;
 303         if (count == ifsta->wmm_last_param_set)
 304                 return;
 305         ifsta->wmm_last_param_set = count;
 306
 307         pos = wmm_param + 8;
 308         left = wmm_param_len - 8;
 309
 310         memset(&params, 0, sizeof(params));
 311
 312         if (!local->ops->conf_tx)
 313                 return;
 314
 315         local->wmm_acm = 0;
 316         for (; left >= 4; left -= 4, pos += 4) {
 317                 int aci = (pos[0] >> 5) & 0x03;
 318                 int acm = (pos[0] >> 4) & 0x01;
 319                 int queue;
 320
 321                 switch (aci) {
 322                 case 1:
 323                         queue = 3;
 324                         if (acm)
 325                                 local->wmm_acm |= BIT(0) | BIT(3);
 326                         break;
 327                 case 2:
 328                         queue = 1;
 329                         if (acm)
 330                                 local->wmm_acm |= BIT(4) | BIT(5);
 331                         break;
 332                 case 3:
 333                         queue = 0;
 334                         if (acm)
 335                                 local->wmm_acm |= BIT(6) | BIT(7);
 336                         break;
 337                 case 0:
 338                 default:
 339                         queue = 2;
 340                         if (acm)
 341                                 local->wmm_acm |= BIT(1) | BIT(2);
 342                         break;
 343                 }
 344
 345                 params.aifs = pos[0] & 0x0f;
 346                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 347                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 348                 params.txop = pos[2] | (pos[3] << 8);
 349 #ifdef CONFIG_MAC80211_DEBUG
 350                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 351                        "cWmin=%d cWmax=%d txop=%d\n",
 352                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 353                        params.cw_max, params.txop);
 354 #endif
 355                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 356                  * AC for now) */
 357                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 358                         printk(KERN_DEBUG "%s: failed to set TX queue "
 359                                "parameters for queue %d\n", dev->name, queue);
 360                 }
 361         }
 362 }
 363
 364 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 365                                            bool use_protection,
 366                                            bool use_short_preamble)
 367 {
 368         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 369         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 370         DECLARE_MAC_BUF(mac);
 371         u32 changed = 0;
 372
 373         if (use_protection != bss_conf->use_cts_prot) {
 374                 if (net_ratelimit()) {
 375                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 376                                "%s)\n",
 377                                sdata->dev->name,
 378                                use_protection ? "enabled" : "disabled",
 379                                print_mac(mac, ifsta->bssid));
 380                 }
 381                 bss_conf->use_cts_prot = use_protection;
 382                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 383         }
 384
 385         if (use_short_preamble != bss_conf->use_short_preamble) {
 386                 if (net_ratelimit()) {
 387                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 388                                " (BSSID=%s)\n",
 389                                sdata->dev->name,
 390                                use_short_preamble ? "short" : "long",
 391                                print_mac(mac, ifsta->bssid));
 392                 }
 393                 bss_conf->use_short_preamble = use_short_preamble;
 394                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 395         }
 396
 397         return changed;
 398 }
 399
 400 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 401                                    u8 erp_value)
 402 {
 403         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 404         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 405
 406         return ieee80211_handle_protect_preamb(sdata,
 407                         use_protection, use_short_preamble);
 408 }
 409
 410 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 411                                            struct ieee80211_sta_bss *bss)
 412 {
 413         u32 changed = 0;
 414
 415         if (bss->has_erp_value)
 416                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 417         else {
 418                 u16 capab = bss->capability;
 419                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 420                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 421         }
 422
 423         return changed;
 424 }
 425
 426 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 427                                    struct ieee80211_ht_info *ht_info)
 428 {
 429
 430         if (ht_info == NULL)
 431                 return -EINVAL;
 432
 433         memset(ht_info, 0, sizeof(*ht_info));
 434
 435         if (ht_cap_ie) {
 436                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 437
 438                 ht_info->ht_supported = 1;
 439                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 440                 ht_info->ampdu_factor =
 441                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 442                 ht_info->ampdu_density =
 443                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 444                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 445         } else
 446                 ht_info->ht_supported = 0;
 447
 448         return 0;
 449 }
 450
 451 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 452                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 453                         struct ieee80211_ht_bss_info *bss_info)
 454 {
 455         if (bss_info == NULL)
 456                 return -EINVAL;
 457
 458         memset(bss_info, 0, sizeof(*bss_info));
 459
 460         if (ht_add_info_ie) {
 461                 u16 op_mode;
 462                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 463
 464                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 465                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 466                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 467         }
 468
 469         return 0;
 470 }
 471
 472 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 473                                          struct ieee80211_if_sta *ifsta)
 474 {
 475         char *buf;
 476         size_t len;
 477         int i;
 478         union iwreq_data wrqu;
 479
 480         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 481                 return;
 482
 483         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 484                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 485         if (!buf)
 486                 return;
 487
 488         len = sprintf(buf, "ASSOCINFO(");
 489         if (ifsta->assocreq_ies) {
 490                 len += sprintf(buf + len, "ReqIEs=");
 491                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 492                         len += sprintf(buf + len, "%02x",
 493                                        ifsta->assocreq_ies[i]);
 494                 }
 495         }
 496         if (ifsta->assocresp_ies) {
 497                 if (ifsta->assocreq_ies)
 498                         len += sprintf(buf + len, " ");
 499                 len += sprintf(buf + len, "RespIEs=");
 500                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 501                         len += sprintf(buf + len, "%02x",
 502                                        ifsta->assocresp_ies[i]);
 503                 }
 504         }
 505         len += sprintf(buf + len, ")");
 506
 507         if (len > IW_CUSTOM_MAX) {
 508                 len = sprintf(buf, "ASSOCRESPIE=");
 509                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 510                         len += sprintf(buf + len, "%02x",
 511                                        ifsta->assocresp_ies[i]);
 512                 }
 513         }
 514
 515         memset(&wrqu, 0, sizeof(wrqu));
 516         wrqu.data.length = len;
 517         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 518
 519         kfree(buf);
 520 }
 521
 522
 523 static void ieee80211_set_associated(struct net_device *dev,
 524                                      struct ieee80211_if_sta *ifsta,
 525                                      bool assoc)
 526 {
 527         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 528         struct ieee80211_local *local = sdata->local;
 529         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 530         union iwreq_data wrqu;
 531         u32 changed = BSS_CHANGED_ASSOC;
 532
 533         if (assoc) {
 534                 struct ieee80211_sta_bss *bss;
 535
 536                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 537
 538                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 539                         return;
 540
 541                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 542                                            conf->channel->center_freq,
 543                                            ifsta->ssid, ifsta->ssid_len);
 544                 if (bss) {
 545                         /* set timing information */
 546                         sdata->bss_conf.beacon_int = bss->beacon_int;
 547                         sdata->bss_conf.timestamp = bss->timestamp;
 548
 549                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 550
 551                         ieee80211_rx_bss_put(dev, bss);
 552                 }
 553
 554                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 555                         changed |= BSS_CHANGED_HT;
 556                         sdata->bss_conf.assoc_ht = 1;
 557                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 558                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 559                 }
 560
 561                 netif_carrier_on(dev);
 562                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 563                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 564                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 565                 ieee80211_sta_send_associnfo(dev, ifsta);
 566         } else {
 567                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 568                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 569                 netif_carrier_off(dev);
 570                 ieee80211_reset_erp_info(dev);
 571
 572                 sdata->bss_conf.assoc_ht = 0;
 573                 sdata->bss_conf.ht_conf = NULL;
 574                 sdata->bss_conf.ht_bss_conf = NULL;
 575
 576                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 577         }
 578         ifsta->last_probe = jiffies;
 579         ieee80211_led_assoc(local, assoc);
 580
 581         sdata->bss_conf.assoc = assoc;
 582         ieee80211_bss_info_change_notify(sdata, changed);
 583         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 584         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 585 }
 586
 587 static void ieee80211_set_disassoc(struct net_device *dev,
 588                                    struct ieee80211_if_sta *ifsta, int deauth)
 589 {
 590         if (deauth)
 591                 ifsta->auth_tries = 0;
 592         ifsta->assoc_tries = 0;
 593         ieee80211_set_associated(dev, ifsta, 0);
 594 }
 595
 596 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 597                       int encrypt)
 598 {
 599         struct ieee80211_sub_if_data *sdata;
 600         struct ieee80211_tx_info *info;
 601
 602         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 603         skb->dev = sdata->local->mdev;
 604         skb_set_mac_header(skb, 0);
 605         skb_set_network_header(skb, 0);
 606         skb_set_transport_header(skb, 0);
 607
 608         info = IEEE80211_SKB_CB(skb);
 609         memset(info, 0, sizeof(struct ieee80211_tx_info));
 610         info->control.ifindex = sdata->dev->ifindex;
 611         if (!encrypt)
 612                 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
 613
 614         dev_queue_xmit(skb);
 615 }
 616
 617
 618 static void ieee80211_send_auth(struct net_device *dev,
 619                                 struct ieee80211_if_sta *ifsta,
 620                                 int transaction, u8 *extra, size_t extra_len,
 621                                 int encrypt)
 622 {
 623         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 624         struct sk_buff *skb;
 625         struct ieee80211_mgmt *mgmt;
 626
 627         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 628                             sizeof(*mgmt) + 6 + extra_len);
 629         if (!skb) {
 630                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 631                        "frame\n", dev->name);
 632                 return;
 633         }
 634         skb_reserve(skb, local->hw.extra_tx_headroom);
 635
 636         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 637         memset(mgmt, 0, 24 + 6);
 638         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 639                                            IEEE80211_STYPE_AUTH);
 640         if (encrypt)
 641                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 642         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 643         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 644         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 645         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 646         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 647         ifsta->auth_transaction = transaction + 1;
 648         mgmt->u.auth.status_code = cpu_to_le16(0);
 649         if (extra)
 650                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 651
 652         ieee80211_sta_tx(dev, skb, encrypt);
 653 }
 654
 655
 656 static void ieee80211_authenticate(struct net_device *dev,
 657                                    struct ieee80211_if_sta *ifsta)
 658 {
 659         DECLARE_MAC_BUF(mac);
 660
 661         ifsta->auth_tries++;
 662         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 663                 printk(KERN_DEBUG "%s: authentication with AP %s"
 664                        " timed out\n",
 665                        dev->name, print_mac(mac, ifsta->bssid));
 666                 ifsta->state = IEEE80211_DISABLED;
 667                 return;
 668         }
 669
 670         ifsta->state = IEEE80211_AUTHENTICATE;
 671         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 672                dev->name, print_mac(mac, ifsta->bssid));
 673
 674         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 675
 676         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 677 }
 678
 679 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 680                                       struct ieee80211_supported_band *sband,
 681                                       u64 *rates)
 682 {
 683         int i, j, count;
 684         *rates = 0;
 685         count = 0;
 686         for (i = 0; i < bss->supp_rates_len; i++) {
 687                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 688
 689                 for (j = 0; j < sband->n_bitrates; j++)
 690                         if (sband->bitrates[j].bitrate == rate) {
 691                                 *rates |= BIT(j);
 692                                 count++;
 693                                 break;
 694                         }
 695         }
 696
 697         return count;
 698 }
 699
 700 static void ieee80211_send_assoc(struct net_device *dev,
 701                                  struct ieee80211_if_sta *ifsta)
 702 {
 703         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 704         struct sk_buff *skb;
 705         struct ieee80211_mgmt *mgmt;
 706         u8 *pos, *ies;
 707         int i, len, count, rates_len, supp_rates_len;
 708         u16 capab;
 709         struct ieee80211_sta_bss *bss;
 710         int wmm = 0;
 711         struct ieee80211_supported_band *sband;
 712         u64 rates = 0;
 713
 714         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 715                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 716                             ifsta->ssid_len);
 717         if (!skb) {
 718                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 719                        "frame\n", dev->name);
 720                 return;
 721         }
 722         skb_reserve(skb, local->hw.extra_tx_headroom);
 723
 724         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 725
 726         capab = ifsta->capab;
 727
 728         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 729                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 730                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 731                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 732                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 733         }
 734
 735         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 736                                    local->hw.conf.channel->center_freq,
 737                                    ifsta->ssid, ifsta->ssid_len);
 738         if (bss) {
 739                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 740                         capab |= WLAN_CAPABILITY_PRIVACY;
 741                 if (bss->wmm_ie)
 742                         wmm = 1;
 743
 744                 /* get all rates supported by the device and the AP as
 745                  * some APs don't like getting a superset of their rates
 746                  * in the association request (e.g. D-Link DAP 1353 in
 747                  * b-only mode) */
 748                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 749
 750                 ieee80211_rx_bss_put(dev, bss);
 751         } else {
 752                 rates = ~0;
 753                 rates_len = sband->n_bitrates;
 754         }
 755
 756         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 757         memset(mgmt, 0, 24);
 758         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 759         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 760         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 761
 762         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 763                 skb_put(skb, 10);
 764                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 765                                                    IEEE80211_STYPE_REASSOC_REQ);
 766                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 767                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 768                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 769                        ETH_ALEN);
 770         } else {
 771                 skb_put(skb, 4);
 772                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 773                                                    IEEE80211_STYPE_ASSOC_REQ);
 774                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 775                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 776         }
 777
 778         /* SSID */
 779         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 780         *pos++ = WLAN_EID_SSID;
 781         *pos++ = ifsta->ssid_len;
 782         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 783
 784         /* add all rates which were marked to be used above */
 785         supp_rates_len = rates_len;
 786         if (supp_rates_len > 8)
 787                 supp_rates_len = 8;
 788
 789         len = sband->n_bitrates;
 790         pos = skb_put(skb, supp_rates_len + 2);
 791         *pos++ = WLAN_EID_SUPP_RATES;
 792         *pos++ = supp_rates_len;
 793
 794         count = 0;
 795         for (i = 0; i < sband->n_bitrates; i++) {
 796                 if (BIT(i) & rates) {
 797                         int rate = sband->bitrates[i].bitrate;
 798                         *pos++ = (u8) (rate / 5);
 799                         if (++count == 8)
 800                                 break;
 801                 }
 802         }
 803
 804         if (count == 8) {
 805                 pos = skb_put(skb, rates_len - count + 2);
 806                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 807                 *pos++ = rates_len - count;
 808
 809                 for (i++; i < sband->n_bitrates; i++) {
 810                         if (BIT(i) & rates) {
 811                                 int rate = sband->bitrates[i].bitrate;
 812                                 *pos++ = (u8) (rate / 5);
 813                         }
 814                 }
 815         }
 816
 817         if (ifsta->extra_ie) {
 818                 pos = skb_put(skb, ifsta->extra_ie_len);
 819                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 820         }
 821
 822         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 823                 pos = skb_put(skb, 9);
 824                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 825                 *pos++ = 7; /* len */
 826                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 827                 *pos++ = 0x50;
 828                 *pos++ = 0xf2;
 829                 *pos++ = 2; /* WME */
 830                 *pos++ = 0; /* WME info */
 831                 *pos++ = 1; /* WME ver */
 832                 *pos++ = 0;
 833         }
 834
 835         /* wmm support is a must to HT */
 836         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 837             sband->ht_info.ht_supported && bss->ht_add_ie) {
 838                 struct ieee80211_ht_addt_info *ht_add_info =
 839                         (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
 840                 u16 cap = sband->ht_info.cap;
 841                 __le16 tmp;
 842                 u32 flags = local->hw.conf.channel->flags;
 843
 844                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 845                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 846                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 847                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 848                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 849                         }
 850                         break;
 851                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 852                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 853                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 854                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 855                         }
 856                         break;
 857                 }
 858
 859                 tmp = cpu_to_le16(cap);
 860                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 861                 *pos++ = WLAN_EID_HT_CAPABILITY;
 862                 *pos++ = sizeof(struct ieee80211_ht_cap);
 863                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 864                 memcpy(pos, &tmp, sizeof(u16));
 865                 pos += sizeof(u16);
 866                 /* TODO: needs a define here for << 2 */
 867                 *pos++ = sband->ht_info.ampdu_factor |
 868                          (sband->ht_info.ampdu_density << 2);
 869                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 870         }
 871
 872         kfree(ifsta->assocreq_ies);
 873         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 874         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 875         if (ifsta->assocreq_ies)
 876                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 877
 878         ieee80211_sta_tx(dev, skb, 0);
 879 }
 880
 881
 882 static void ieee80211_send_deauth(struct net_device *dev,
 883                                   struct ieee80211_if_sta *ifsta, u16 reason)
 884 {
 885         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 886         struct sk_buff *skb;
 887         struct ieee80211_mgmt *mgmt;
 888
 889         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 890         if (!skb) {
 891                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 892                        "frame\n", dev->name);
 893                 return;
 894         }
 895         skb_reserve(skb, local->hw.extra_tx_headroom);
 896
 897         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 898         memset(mgmt, 0, 24);
 899         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 900         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 901         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 902         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 903                                            IEEE80211_STYPE_DEAUTH);
 904         skb_put(skb, 2);
 905         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 906
 907         ieee80211_sta_tx(dev, skb, 0);
 908 }
 909
 910
 911 static void ieee80211_send_disassoc(struct net_device *dev,
 912                                     struct ieee80211_if_sta *ifsta, u16 reason)
 913 {
 914         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 915         struct sk_buff *skb;
 916         struct ieee80211_mgmt *mgmt;
 917
 918         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 919         if (!skb) {
 920                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 921                        "frame\n", dev->name);
 922                 return;
 923         }
 924         skb_reserve(skb, local->hw.extra_tx_headroom);
 925
 926         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 927         memset(mgmt, 0, 24);
 928         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 929         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 930         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 931         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 932                                            IEEE80211_STYPE_DISASSOC);
 933         skb_put(skb, 2);
 934         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 935
 936         ieee80211_sta_tx(dev, skb, 0);
 937 }
 938
 939
 940 static int ieee80211_privacy_mismatch(struct net_device *dev,
 941                                       struct ieee80211_if_sta *ifsta)
 942 {
 943         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 944         struct ieee80211_sta_bss *bss;
 945         int bss_privacy;
 946         int wep_privacy;
 947         int privacy_invoked;
 948
 949         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 950                 return 0;
 951
 952         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 953                                    local->hw.conf.channel->center_freq,
 954                                    ifsta->ssid, ifsta->ssid_len);
 955         if (!bss)
 956                 return 0;
 957
 958         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 959         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 960         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 961
 962         ieee80211_rx_bss_put(dev, bss);
 963
 964         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 965                 return 0;
 966
 967         return 1;
 968 }
 969
 970
 971 static void ieee80211_associate(struct net_device *dev,
 972                                 struct ieee80211_if_sta *ifsta)
 973 {
 974         DECLARE_MAC_BUF(mac);
 975
 976         ifsta->assoc_tries++;
 977         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 978                 printk(KERN_DEBUG "%s: association with AP %s"
 979                        " timed out\n",
 980                        dev->name, print_mac(mac, ifsta->bssid));
 981                 ifsta->state = IEEE80211_DISABLED;
 982                 return;
 983         }
 984
 985         ifsta->state = IEEE80211_ASSOCIATE;
 986         printk(KERN_DEBUG "%s: associate with AP %s\n",
 987                dev->name, print_mac(mac, ifsta->bssid));
 988         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 989                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 990                        "mixed-cell disabled - abort association\n", dev->name);
 991                 ifsta->state = IEEE80211_DISABLED;
 992                 return;
 993         }
 994
 995         ieee80211_send_assoc(dev, ifsta);
 996
 997         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 998 }
 999
1000
1001 static void ieee80211_associated(struct net_device *dev,
1002                                  struct ieee80211_if_sta *ifsta)
1003 {
1004         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1005         struct sta_info *sta;
1006         int disassoc;
1007         DECLARE_MAC_BUF(mac);
1008
1009         /* TODO: start monitoring current AP signal quality and number of
1010          * missed beacons. Scan other channels every now and then and search
1011          * for better APs. */
1012         /* TODO: remove expired BSSes */
1013
1014         ifsta->state = IEEE80211_ASSOCIATED;
1015
1016         rcu_read_lock();
1017
1018         sta = sta_info_get(local, ifsta->bssid);
1019         if (!sta) {
1020                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1021                        dev->name, print_mac(mac, ifsta->bssid));
1022                 disassoc = 1;
1023         } else {
1024                 disassoc = 0;
1025                 if (time_after(jiffies,
1026                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1027                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1028                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1029                                        "current AP %s - assume out of "
1030                                        "range\n",
1031                                        dev->name, print_mac(mac, ifsta->bssid));
1032                                 disassoc = 1;
1033                                 sta_info_unlink(&sta);
1034                         } else
1035                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1036                                                          local->scan_ssid,
1037                                                          local->scan_ssid_len);
1038                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1039                 } else {
1040                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1041                         if (time_after(jiffies, ifsta->last_probe +
1042                                        IEEE80211_PROBE_INTERVAL)) {
1043                                 ifsta->last_probe = jiffies;
1044                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1045                                                          ifsta->ssid,
1046                                                          ifsta->ssid_len);
1047                         }
1048                 }
1049         }
1050
1051         rcu_read_unlock();
1052
1053         if (disassoc && sta)
1054                 sta_info_destroy(sta);
1055
1056         if (disassoc) {
1057                 ifsta->state = IEEE80211_DISABLED;
1058                 ieee80211_set_associated(dev, ifsta, 0);
1059         } else {
1060                 mod_timer(&ifsta->timer, jiffies +
1061                                       IEEE80211_MONITORING_INTERVAL);
1062         }
1063 }
1064
1065
1066 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1067                                      u8 *ssid, size_t ssid_len)
1068 {
1069         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1070         struct ieee80211_supported_band *sband;
1071         struct sk_buff *skb;
1072         struct ieee80211_mgmt *mgmt;
1073         u8 *pos, *supp_rates, *esupp_rates = NULL;
1074         int i;
1075
1076         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1077         if (!skb) {
1078                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1079                        "request\n", dev->name);
1080                 return;
1081         }
1082         skb_reserve(skb, local->hw.extra_tx_headroom);
1083
1084         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1085         memset(mgmt, 0, 24);
1086         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1087                                            IEEE80211_STYPE_PROBE_REQ);
1088         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1089         if (dst) {
1090                 memcpy(mgmt->da, dst, ETH_ALEN);
1091                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1092         } else {
1093                 memset(mgmt->da, 0xff, ETH_ALEN);
1094                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1095         }
1096         pos = skb_put(skb, 2 + ssid_len);
1097         *pos++ = WLAN_EID_SSID;
1098         *pos++ = ssid_len;
1099         memcpy(pos, ssid, ssid_len);
1100
1101         supp_rates = skb_put(skb, 2);
1102         supp_rates[0] = WLAN_EID_SUPP_RATES;
1103         supp_rates[1] = 0;
1104         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1105
1106         for (i = 0; i < sband->n_bitrates; i++) {
1107                 struct ieee80211_rate *rate = &sband->bitrates[i];
1108                 if (esupp_rates) {
1109                         pos = skb_put(skb, 1);
1110                         esupp_rates[1]++;
1111                 } else if (supp_rates[1] == 8) {
1112                         esupp_rates = skb_put(skb, 3);
1113                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1114                         esupp_rates[1] = 1;
1115                         pos = &esupp_rates[2];
1116                 } else {
1117                         pos = skb_put(skb, 1);
1118                         supp_rates[1]++;
1119                 }
1120                 *pos = rate->bitrate / 5;
1121         }
1122
1123         ieee80211_sta_tx(dev, skb, 0);
1124 }
1125
1126
1127 static int ieee80211_sta_wep_configured(struct net_device *dev)
1128 {
1129         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1130         if (!sdata || !sdata->default_key ||
1131             sdata->default_key->conf.alg != ALG_WEP)
1132                 return 0;
1133         return 1;
1134 }
1135
1136
1137 static void ieee80211_auth_completed(struct net_device *dev,
1138                                      struct ieee80211_if_sta *ifsta)
1139 {
1140         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1141         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1142         ieee80211_associate(dev, ifsta);
1143 }
1144
1145
1146 static void ieee80211_auth_challenge(struct net_device *dev,
1147                                      struct ieee80211_if_sta *ifsta,
1148                                      struct ieee80211_mgmt *mgmt,
1149                                      size_t len)
1150 {
1151         u8 *pos;
1152         struct ieee802_11_elems elems;
1153
1154         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1155         pos = mgmt->u.auth.variable;
1156         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1157         if (!elems.challenge) {
1158                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1159                        "frame\n", dev->name);
1160                 return;
1161         }
1162         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1163                             elems.challenge_len + 2, 1);
1164 }
1165
1166 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1167                                         u8 dialog_token, u16 status, u16 policy,
1168                                         u16 buf_size, u16 timeout)
1169 {
1170         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1171         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1172         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1173         struct sk_buff *skb;
1174         struct ieee80211_mgmt *mgmt;
1175         u16 capab;
1176
1177         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1178
1179         if (!skb) {
1180                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1181                        "for addba resp frame\n", dev->name);
1182                 return;
1183         }
1184
1185         skb_reserve(skb, local->hw.extra_tx_headroom);
1186         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1187         memset(mgmt, 0, 24);
1188         memcpy(mgmt->da, da, ETH_ALEN);
1189         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1190         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1191                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1192         else
1193                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1194         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1195                                            IEEE80211_STYPE_ACTION);
1196
1197         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1198         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1199         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1200         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1201
1202         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1203         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1204         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1205
1206         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1207         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1208         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1209
1210         ieee80211_sta_tx(dev, skb, 0);
1211
1212         return;
1213 }
1214
1215 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1216                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1217                                 u16 agg_size, u16 timeout)
1218 {
1219         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1220         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1221         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1222         struct sk_buff *skb;
1223         struct ieee80211_mgmt *mgmt;
1224         u16 capab;
1225
1226         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1227
1228         if (!skb) {
1229                 printk(KERN_ERR "%s: failed to allocate buffer "
1230                                 "for addba request frame\n", dev->name);
1231                 return;
1232         }
1233         skb_reserve(skb, local->hw.extra_tx_headroom);
1234         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1235         memset(mgmt, 0, 24);
1236         memcpy(mgmt->da, da, ETH_ALEN);
1237         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1238         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1239                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1240         else
1241                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1242
1243         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1244                                         IEEE80211_STYPE_ACTION);
1245
1246         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1247
1248         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1249         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1250
1251         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1252         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1253         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1254         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1255
1256         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1257
1258         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1259         mgmt->u.action.u.addba_req.start_seq_num =
1260                                         cpu_to_le16(start_seq_num << 4);
1261
1262         ieee80211_sta_tx(dev, skb, 0);
1263 }
1264
1265 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1266                                                 struct ieee80211_mgmt *mgmt,
1267                                                 size_t len)
1268 {
1269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1270         struct ieee80211_hw *hw = &local->hw;
1271         struct ieee80211_conf *conf = &hw->conf;
1272         struct sta_info *sta;
1273         struct tid_ampdu_rx *tid_agg_rx;
1274         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1275         u8 dialog_token;
1276         int ret = -EOPNOTSUPP;
1277         DECLARE_MAC_BUF(mac);
1278
1279         rcu_read_lock();
1280
1281         sta = sta_info_get(local, mgmt->sa);
1282         if (!sta) {
1283                 rcu_read_unlock();
1284                 return;
1285         }
1286
1287         /* extract session parameters from addba request frame */
1288         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1289         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1290         start_seq_num =
1291                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1292
1293         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1294         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1295         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1296         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1297
1298         status = WLAN_STATUS_REQUEST_DECLINED;
1299
1300         /* sanity check for incoming parameters:
1301          * check if configuration can support the BA policy
1302          * and if buffer size does not exceeds max value */
1303         if (((ba_policy != 1)
1304                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1305                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1306                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1307 #ifdef CONFIG_MAC80211_HT_DEBUG
1308                 if (net_ratelimit())
1309                         printk(KERN_DEBUG "AddBA Req with bad params from "
1310                                 "%s on tid %u. policy %d, buffer size %d\n",
1311                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1312                                 buf_size);
1313 #endif /* CONFIG_MAC80211_HT_DEBUG */
1314                 goto end_no_lock;
1315         }
1316         /* determine default buffer size */
1317         if (buf_size == 0) {
1318                 struct ieee80211_supported_band *sband;
1319
1320                 sband = local->hw.wiphy->bands[conf->channel->band];
1321                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1322                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1323         }
1324
1325
1326         /* examine state machine */
1327         spin_lock_bh(&sta->lock);
1328
1329         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1330 #ifdef CONFIG_MAC80211_HT_DEBUG
1331                 if (net_ratelimit())
1332                         printk(KERN_DEBUG "unexpected AddBA Req from "
1333                                 "%s on tid %u\n",
1334                                 print_mac(mac, mgmt->sa), tid);
1335 #endif /* CONFIG_MAC80211_HT_DEBUG */
1336                 goto end;
1337         }
1338
1339         /* prepare A-MPDU MLME for Rx aggregation */
1340         sta->ampdu_mlme.tid_rx[tid] =
1341                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1342         if (!sta->ampdu_mlme.tid_rx[tid]) {
1343                 if (net_ratelimit())
1344                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1345                                         tid);
1346                 goto end;
1347         }
1348         /* rx timer */
1349         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1350                                 sta_rx_agg_session_timer_expired;
1351         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1352                                 (unsigned long)&sta->timer_to_tid[tid];
1353         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1354
1355         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1356
1357         /* prepare reordering buffer */
1358         tid_agg_rx->reorder_buf =
1359                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1360         if (!tid_agg_rx->reorder_buf) {
1361                 if (net_ratelimit())
1362                         printk(KERN_ERR "can not allocate reordering buffer "
1363                                "to tid %d\n", tid);
1364                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1365                 goto end;
1366         }
1367         memset(tid_agg_rx->reorder_buf, 0,
1368                 buf_size * sizeof(struct sk_buff *));
1369
1370         if (local->ops->ampdu_action)
1371                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1372                                                sta->addr, tid, &start_seq_num);
1373 #ifdef CONFIG_MAC80211_HT_DEBUG
1374         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1375 #endif /* CONFIG_MAC80211_HT_DEBUG */
1376
1377         if (ret) {
1378                 kfree(tid_agg_rx->reorder_buf);
1379                 kfree(tid_agg_rx);
1380                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1381                 goto end;
1382         }
1383
1384         /* change state and send addba resp */
1385         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1386         tid_agg_rx->dialog_token = dialog_token;
1387         tid_agg_rx->ssn = start_seq_num;
1388         tid_agg_rx->head_seq_num = start_seq_num;
1389         tid_agg_rx->buf_size = buf_size;
1390         tid_agg_rx->timeout = timeout;
1391         tid_agg_rx->stored_mpdu_num = 0;
1392         status = WLAN_STATUS_SUCCESS;
1393 end:
1394         spin_unlock_bh(&sta->lock);
1395
1396 end_no_lock:
1397         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1398                                   dialog_token, status, 1, buf_size, timeout);
1399         rcu_read_unlock();
1400 }
1401
1402 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1403                                              struct ieee80211_mgmt *mgmt,
1404                                              size_t len)
1405 {
1406         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1407         struct ieee80211_hw *hw = &local->hw;
1408         struct sta_info *sta;
1409         u16 capab;
1410         u16 tid;
1411         u8 *state;
1412
1413         rcu_read_lock();
1414
1415         sta = sta_info_get(local, mgmt->sa);
1416         if (!sta) {
1417                 rcu_read_unlock();
1418                 return;
1419         }
1420
1421         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1422         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1423
1424         state = &sta->ampdu_mlme.tid_state_tx[tid];
1425
1426         spin_lock_bh(&sta->lock);
1427
1428         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1429                 spin_unlock_bh(&sta->lock);
1430                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1431                         "%d\n", *state);
1432                 goto addba_resp_exit;
1433         }
1434
1435         if (mgmt->u.action.u.addba_resp.dialog_token !=
1436                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1437                 spin_unlock_bh(&sta->lock);
1438 #ifdef CONFIG_MAC80211_HT_DEBUG
1439                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1440 #endif /* CONFIG_MAC80211_HT_DEBUG */
1441                 goto addba_resp_exit;
1442         }
1443
1444         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1445 #ifdef CONFIG_MAC80211_HT_DEBUG
1446         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1447 #endif /* CONFIG_MAC80211_HT_DEBUG */
1448         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1449                         == WLAN_STATUS_SUCCESS) {
1450                 if (*state & HT_ADDBA_RECEIVED_MSK)
1451                         printk(KERN_DEBUG "double addBA response\n");
1452
1453                 *state |= HT_ADDBA_RECEIVED_MSK;
1454                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1455
1456                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1457                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1458                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1459                 }
1460
1461                 spin_unlock_bh(&sta->lock);
1462                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1463         } else {
1464                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1465
1466                 sta->ampdu_mlme.addba_req_num[tid]++;
1467                 /* this will allow the state check in stop_BA_session */
1468                 *state = HT_AGG_STATE_OPERATIONAL;
1469                 spin_unlock_bh(&sta->lock);
1470                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1471                                              WLAN_BACK_INITIATOR);
1472         }
1473
1474 addba_resp_exit:
1475         rcu_read_unlock();
1476 }
1477
1478 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1479                           u16 initiator, u16 reason_code)
1480 {
1481         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1482         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1483         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1484         struct sk_buff *skb;
1485         struct ieee80211_mgmt *mgmt;
1486         u16 params;
1487
1488         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1489
1490         if (!skb) {
1491                 printk(KERN_ERR "%s: failed to allocate buffer "
1492                                         "for delba frame\n", dev->name);
1493                 return;
1494         }
1495
1496         skb_reserve(skb, local->hw.extra_tx_headroom);
1497         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1498         memset(mgmt, 0, 24);
1499         memcpy(mgmt->da, da, ETH_ALEN);
1500         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1501         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1502                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1503         else
1504                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1505         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1506                                         IEEE80211_STYPE_ACTION);
1507
1508         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1509
1510         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1511         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1512         params = (u16)(initiator << 11);        /* bit 11 initiator */
1513         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1514
1515         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1516         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1517
1518         ieee80211_sta_tx(dev, skb, 0);
1519 }
1520
1521 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1522                                         u16 initiator, u16 reason)
1523 {
1524         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1525         struct ieee80211_hw *hw = &local->hw;
1526         struct sta_info *sta;
1527         int ret, i;
1528         DECLARE_MAC_BUF(mac);
1529
1530         rcu_read_lock();
1531
1532         sta = sta_info_get(local, ra);
1533         if (!sta) {
1534                 rcu_read_unlock();
1535                 return;
1536         }
1537
1538         /* check if TID is in operational state */
1539         spin_lock_bh(&sta->lock);
1540         if (sta->ampdu_mlme.tid_state_rx[tid]
1541                                 != HT_AGG_STATE_OPERATIONAL) {
1542                 spin_unlock_bh(&sta->lock);
1543                 rcu_read_unlock();
1544                 return;
1545         }
1546         sta->ampdu_mlme.tid_state_rx[tid] =
1547                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1548                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1549         spin_unlock_bh(&sta->lock);
1550
1551         /* stop HW Rx aggregation. ampdu_action existence
1552          * already verified in session init so we add the BUG_ON */
1553         BUG_ON(!local->ops->ampdu_action);
1554
1555 #ifdef CONFIG_MAC80211_HT_DEBUG
1556         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1557                                 print_mac(mac, ra), tid);
1558 #endif /* CONFIG_MAC80211_HT_DEBUG */
1559
1560         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1561                                         ra, tid, NULL);
1562         if (ret)
1563                 printk(KERN_DEBUG "HW problem - can not stop rx "
1564                                 "aggergation for tid %d\n", tid);
1565
1566         /* shutdown timer has not expired */
1567         if (initiator != WLAN_BACK_TIMER)
1568                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1569
1570         /* check if this is a self generated aggregation halt */
1571         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1572                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1573
1574         /* free the reordering buffer */
1575         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1576                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1577                         /* release the reordered frames */
1578                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1579                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1580                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1581                 }
1582         }
1583         /* free resources */
1584         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1585         kfree(sta->ampdu_mlme.tid_rx[tid]);
1586         sta->ampdu_mlme.tid_rx[tid] = NULL;
1587         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1588
1589         rcu_read_unlock();
1590 }
1591
1592
1593 static void ieee80211_sta_process_delba(struct net_device *dev,
1594                         struct ieee80211_mgmt *mgmt, size_t len)
1595 {
1596         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1597         struct sta_info *sta;
1598         u16 tid, params;
1599         u16 initiator;
1600         DECLARE_MAC_BUF(mac);
1601
1602         rcu_read_lock();
1603
1604         sta = sta_info_get(local, mgmt->sa);
1605         if (!sta) {
1606                 rcu_read_unlock();
1607                 return;
1608         }
1609
1610         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1611         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1612         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1613
1614 #ifdef CONFIG_MAC80211_HT_DEBUG
1615         if (net_ratelimit())
1616                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1617                         print_mac(mac, mgmt->sa),
1618                         initiator ? "initiator" : "recipient", tid,
1619                         mgmt->u.action.u.delba.reason_code);
1620 #endif /* CONFIG_MAC80211_HT_DEBUG */
1621
1622         if (initiator == WLAN_BACK_INITIATOR)
1623                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1624                                                  WLAN_BACK_INITIATOR, 0);
1625         else { /* WLAN_BACK_RECIPIENT */
1626                 spin_lock_bh(&sta->lock);
1627                 sta->ampdu_mlme.tid_state_tx[tid] =
1628                                 HT_AGG_STATE_OPERATIONAL;
1629                 spin_unlock_bh(&sta->lock);
1630                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1631                                              WLAN_BACK_RECIPIENT);
1632         }
1633         rcu_read_unlock();
1634 }
1635
1636 /*
1637  * After sending add Block Ack request we activated a timer until
1638  * add Block Ack response will arrive from the recipient.
1639  * If this timer expires sta_addba_resp_timer_expired will be executed.
1640  */
1641 void sta_addba_resp_timer_expired(unsigned long data)
1642 {
1643         /* not an elegant detour, but there is no choice as the timer passes
1644          * only one argument, and both sta_info and TID are needed, so init
1645          * flow in sta_info_create gives the TID as data, while the timer_to_id
1646          * array gives the sta through container_of */
1647         u16 tid = *(u8 *)data;
1648         struct sta_info *temp_sta = container_of((void *)data,
1649                 struct sta_info, timer_to_tid[tid]);
1650
1651         struct ieee80211_local *local = temp_sta->local;
1652         struct ieee80211_hw *hw = &local->hw;
1653         struct sta_info *sta;
1654         u8 *state;
1655
1656         rcu_read_lock();
1657
1658         sta = sta_info_get(local, temp_sta->addr);
1659         if (!sta) {
1660                 rcu_read_unlock();
1661                 return;
1662         }
1663
1664         state = &sta->ampdu_mlme.tid_state_tx[tid];
1665         /* check if the TID waits for addBA response */
1666         spin_lock_bh(&sta->lock);
1667         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1668                 spin_unlock_bh(&sta->lock);
1669                 *state = HT_AGG_STATE_IDLE;
1670                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1671                                 "expecting addBA response there", tid);
1672                 goto timer_expired_exit;
1673         }
1674
1675         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1676
1677         /* go through the state check in stop_BA_session */
1678         *state = HT_AGG_STATE_OPERATIONAL;
1679         spin_unlock_bh(&sta->lock);
1680         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1681                                      WLAN_BACK_INITIATOR);
1682
1683 timer_expired_exit:
1684         rcu_read_unlock();
1685 }
1686
1687 /*
1688  * After accepting the AddBA Request we activated a timer,
1689  * resetting it after each frame that arrives from the originator.
1690  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1691  */
1692 static void sta_rx_agg_session_timer_expired(unsigned long data)
1693 {
1694         /* not an elegant detour, but there is no choice as the timer passes
1695          * only one argument, and various sta_info are needed here, so init
1696          * flow in sta_info_create gives the TID as data, while the timer_to_id
1697          * array gives the sta through container_of */
1698         u8 *ptid = (u8 *)data;
1699         u8 *timer_to_id = ptid - *ptid;
1700         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1701                                          timer_to_tid[0]);
1702
1703         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1704         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1705                                          (u16)*ptid, WLAN_BACK_TIMER,
1706                                          WLAN_REASON_QSTA_TIMEOUT);
1707 }
1708
1709 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1710 {
1711         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1712         int i;
1713
1714         for (i = 0; i <  STA_TID_NUM; i++) {
1715                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1716                                              WLAN_BACK_INITIATOR);
1717                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1718                                                  WLAN_BACK_RECIPIENT,
1719                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1720         }
1721 }
1722
1723 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1724                                    struct ieee80211_if_sta *ifsta,
1725                                    struct ieee80211_mgmt *mgmt,
1726                                    size_t len)
1727 {
1728         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1729         u16 auth_alg, auth_transaction, status_code;
1730         DECLARE_MAC_BUF(mac);
1731
1732         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1733             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1734                 printk(KERN_DEBUG "%s: authentication frame received from "
1735                        "%s, but not in authenticate state - ignored\n",
1736                        dev->name, print_mac(mac, mgmt->sa));
1737                 return;
1738         }
1739
1740         if (len < 24 + 6) {
1741                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1742                        "received from %s - ignored\n",
1743                        dev->name, len, print_mac(mac, mgmt->sa));
1744                 return;
1745         }
1746
1747         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1748             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1749                 printk(KERN_DEBUG "%s: authentication frame received from "
1750                        "unknown AP (SA=%s BSSID=%s) - "
1751                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1752                        print_mac(mac, mgmt->bssid));
1753                 return;
1754         }
1755
1756         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1757             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1758                 printk(KERN_DEBUG "%s: authentication frame received from "
1759                        "unknown BSSID (SA=%s BSSID=%s) - "
1760                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1761                        print_mac(mac, mgmt->bssid));
1762                 return;
1763         }
1764
1765         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1766         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1767         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1768
1769         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1770                "transaction=%d status=%d)\n",
1771                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1772                auth_transaction, status_code);
1773
1774         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1775                 /* IEEE 802.11 standard does not require authentication in IBSS
1776                  * networks and most implementations do not seem to use it.
1777                  * However, try to reply to authentication attempts if someone
1778                  * has actually implemented this.
1779                  * TODO: Could implement shared key authentication. */
1780                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1781                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1782                                "frame (alg=%d transaction=%d)\n",
1783                                dev->name, auth_alg, auth_transaction);
1784                         return;
1785                 }
1786                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1787         }
1788
1789         if (auth_alg != ifsta->auth_alg ||
1790             auth_transaction != ifsta->auth_transaction) {
1791                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1792                        "(alg=%d transaction=%d)\n",
1793                        dev->name, auth_alg, auth_transaction);
1794                 return;
1795         }
1796
1797         if (status_code != WLAN_STATUS_SUCCESS) {
1798                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1799                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1800                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1801                         u8 algs[3];
1802                         const int num_algs = ARRAY_SIZE(algs);
1803                         int i, pos;
1804                         algs[0] = algs[1] = algs[2] = 0xff;
1805                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1806                                 algs[0] = WLAN_AUTH_OPEN;
1807                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1808                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1809                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1810                                 algs[2] = WLAN_AUTH_LEAP;
1811                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1812                                 pos = 0;
1813                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1814                                 pos = 1;
1815                         else
1816                                 pos = 2;
1817                         for (i = 0; i < num_algs; i++) {
1818                                 pos++;
1819                                 if (pos >= num_algs)
1820                                         pos = 0;
1821                                 if (algs[pos] == ifsta->auth_alg ||
1822                                     algs[pos] == 0xff)
1823                                         continue;
1824                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1825                                     !ieee80211_sta_wep_configured(dev))
1826                                         continue;
1827                                 ifsta->auth_alg = algs[pos];
1828                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1829                                        "next try\n",
1830                                        dev->name, ifsta->auth_alg);
1831                                 break;
1832                         }
1833                 }
1834                 return;
1835         }
1836
1837         switch (ifsta->auth_alg) {
1838         case WLAN_AUTH_OPEN:
1839         case WLAN_AUTH_LEAP:
1840                 ieee80211_auth_completed(dev, ifsta);
1841                 break;
1842         case WLAN_AUTH_SHARED_KEY:
1843                 if (ifsta->auth_transaction == 4)
1844                         ieee80211_auth_completed(dev, ifsta);
1845                 else
1846                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1847                 break;
1848         }
1849 }
1850
1851
1852 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1853                                      struct ieee80211_if_sta *ifsta,
1854                                      struct ieee80211_mgmt *mgmt,
1855                                      size_t len)
1856 {
1857         u16 reason_code;
1858         DECLARE_MAC_BUF(mac);
1859
1860         if (len < 24 + 2) {
1861                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1862                        "received from %s - ignored\n",
1863                        dev->name, len, print_mac(mac, mgmt->sa));
1864                 return;
1865         }
1866
1867         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1868                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1869                        "unknown AP (SA=%s BSSID=%s) - "
1870                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1871                        print_mac(mac, mgmt->bssid));
1872                 return;
1873         }
1874
1875         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1876
1877         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1878                " (reason=%d)\n",
1879                dev->name, print_mac(mac, mgmt->sa), reason_code);
1880
1881         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1882                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1883
1884         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1885             ifsta->state == IEEE80211_ASSOCIATE ||
1886             ifsta->state == IEEE80211_ASSOCIATED) {
1887                 ifsta->state = IEEE80211_AUTHENTICATE;
1888                 mod_timer(&ifsta->timer, jiffies +
1889                                       IEEE80211_RETRY_AUTH_INTERVAL);
1890         }
1891
1892         ieee80211_set_disassoc(dev, ifsta, 1);
1893         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1894 }
1895
1896
1897 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1898                                        struct ieee80211_if_sta *ifsta,
1899                                        struct ieee80211_mgmt *mgmt,
1900                                        size_t len)
1901 {
1902         u16 reason_code;
1903         DECLARE_MAC_BUF(mac);
1904
1905         if (len < 24 + 2) {
1906                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1907                        "received from %s - ignored\n",
1908                        dev->name, len, print_mac(mac, mgmt->sa));
1909                 return;
1910         }
1911
1912         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1913                 printk(KERN_DEBUG "%s: disassociation frame received from "
1914                        "unknown AP (SA=%s BSSID=%s) - "
1915                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1916                        print_mac(mac, mgmt->bssid));
1917                 return;
1918         }
1919
1920         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1921
1922         printk(KERN_DEBUG "%s: RX disassociation from %s"
1923                " (reason=%d)\n",
1924                dev->name, print_mac(mac, mgmt->sa), reason_code);
1925
1926         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1927                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1928
1929         if (ifsta->state == IEEE80211_ASSOCIATED) {
1930                 ifsta->state = IEEE80211_ASSOCIATE;
1931                 mod_timer(&ifsta->timer, jiffies +
1932                                       IEEE80211_RETRY_AUTH_INTERVAL);
1933         }
1934
1935         ieee80211_set_disassoc(dev, ifsta, 0);
1936 }
1937
1938
1939 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1940                                          struct ieee80211_if_sta *ifsta,
1941                                          struct ieee80211_mgmt *mgmt,
1942                                          size_t len,
1943                                          int reassoc)
1944 {
1945         struct ieee80211_local *local = sdata->local;
1946         struct net_device *dev = sdata->dev;
1947         struct ieee80211_supported_band *sband;
1948         struct sta_info *sta;
1949         u64 rates, basic_rates;
1950         u16 capab_info, status_code, aid;
1951         struct ieee802_11_elems elems;
1952         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1953         u8 *pos;
1954         int i, j;
1955         DECLARE_MAC_BUF(mac);
1956         bool have_higher_than_11mbit = false;
1957
1958         /* AssocResp and ReassocResp have identical structure, so process both
1959          * of them in this function. */
1960
1961         if (ifsta->state != IEEE80211_ASSOCIATE) {
1962                 printk(KERN_DEBUG "%s: association frame received from "
1963                        "%s, but not in associate state - ignored\n",
1964                        dev->name, print_mac(mac, mgmt->sa));
1965                 return;
1966         }
1967
1968         if (len < 24 + 6) {
1969                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1970                        "received from %s - ignored\n",
1971                        dev->name, len, print_mac(mac, mgmt->sa));
1972                 return;
1973         }
1974
1975         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1976                 printk(KERN_DEBUG "%s: association frame received from "
1977                        "unknown AP (SA=%s BSSID=%s) - "
1978                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1979                        print_mac(mac, mgmt->bssid));
1980                 return;
1981         }
1982
1983         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1984         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1985         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1986
1987         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1988                "status=%d aid=%d)\n",
1989                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1990                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1991
1992         if (status_code != WLAN_STATUS_SUCCESS) {
1993                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1994                        dev->name, status_code);
1995                 /* if this was a reassociation, ensure we try a "full"
1996                  * association next time. This works around some broken APs
1997                  * which do not correctly reject reassociation requests. */
1998                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1999                 return;
2000         }
2001
2002         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2003                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2004                        "set\n", dev->name, aid);
2005         aid &= ~(BIT(15) | BIT(14));
2006
2007         pos = mgmt->u.assoc_resp.variable;
2008         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2009
2010         if (!elems.supp_rates) {
2011                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2012                        dev->name);
2013                 return;
2014         }
2015
2016         printk(KERN_DEBUG "%s: associated\n", dev->name);
2017         ifsta->aid = aid;
2018         ifsta->ap_capab = capab_info;
2019
2020         kfree(ifsta->assocresp_ies);
2021         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2022         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2023         if (ifsta->assocresp_ies)
2024                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2025
2026         rcu_read_lock();
2027
2028         /* Add STA entry for the AP */
2029         sta = sta_info_get(local, ifsta->bssid);
2030         if (!sta) {
2031                 struct ieee80211_sta_bss *bss;
2032                 int err;
2033
2034                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2035                 if (!sta) {
2036                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2037                                " the AP\n", dev->name);
2038                         rcu_read_unlock();
2039                         return;
2040                 }
2041                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2042                                            local->hw.conf.channel->center_freq,
2043                                            ifsta->ssid, ifsta->ssid_len);
2044                 if (bss) {
2045                         sta->last_signal = bss->signal;
2046                         sta->last_qual = bss->qual;
2047                         sta->last_noise = bss->noise;
2048                         ieee80211_rx_bss_put(dev, bss);
2049                 }
2050
2051                 err = sta_info_insert(sta);
2052                 if (err) {
2053                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2054                                " the AP (error %d)\n", dev->name, err);
2055                         rcu_read_unlock();
2056                         return;
2057                 }
2058         }
2059
2060         /*
2061          * FIXME: Do we really need to update the sta_info's information here?
2062          *        We already know about the AP (we found it in our list) so it
2063          *        should already be filled with the right info, no?
2064          *        As is stands, all this is racy because typically we assume
2065          *        the information that is filled in here (except flags) doesn't
2066          *        change while a STA structure is alive. As such, it should move
2067          *        to between the sta_info_alloc() and sta_info_insert() above.
2068          */
2069
2070         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2071                            WLAN_STA_AUTHORIZED);
2072
2073         rates = 0;
2074         basic_rates = 0;
2075         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2076
2077         for (i = 0; i < elems.supp_rates_len; i++) {
2078                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2079
2080                 if (rate > 110)
2081                         have_higher_than_11mbit = true;
2082
2083                 for (j = 0; j < sband->n_bitrates; j++) {
2084                         if (sband->bitrates[j].bitrate == rate)
2085                                 rates |= BIT(j);
2086                         if (elems.supp_rates[i] & 0x80)
2087                                 basic_rates |= BIT(j);
2088                 }
2089         }
2090
2091         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2092                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2093
2094                 if (rate > 110)
2095                         have_higher_than_11mbit = true;
2096
2097                 for (j = 0; j < sband->n_bitrates; j++) {
2098                         if (sband->bitrates[j].bitrate == rate)
2099                                 rates |= BIT(j);
2100                         if (elems.ext_supp_rates[i] & 0x80)
2101                                 basic_rates |= BIT(j);
2102                 }
2103         }
2104
2105         sta->supp_rates[local->hw.conf.channel->band] = rates;
2106         sdata->basic_rates = basic_rates;
2107
2108         /* cf. IEEE 802.11 9.2.12 */
2109         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2110             have_higher_than_11mbit)
2111                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2112         else
2113                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2114
2115         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2116             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2117                 struct ieee80211_ht_bss_info bss_info;
2118                 ieee80211_ht_cap_ie_to_ht_info(
2119                                 (struct ieee80211_ht_cap *)
2120                                 elems.ht_cap_elem, &sta->ht_info);
2121                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2122                                 (struct ieee80211_ht_addt_info *)
2123                                 elems.ht_info_elem, &bss_info);
2124                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2125         }
2126
2127         rate_control_rate_init(sta, local);
2128
2129         if (elems.wmm_param) {
2130                 set_sta_flags(sta, WLAN_STA_WME);
2131                 rcu_read_unlock();
2132                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2133                                          elems.wmm_param_len);
2134         } else
2135                 rcu_read_unlock();
2136
2137         /* set AID and assoc capability,
2138          * ieee80211_set_associated() will tell the driver */
2139         bss_conf->aid = aid;
2140         bss_conf->assoc_capability = capab_info;
2141         ieee80211_set_associated(dev, ifsta, 1);
2142
2143         ieee80211_associated(dev, ifsta);
2144 }
2145
2146
2147 /* Caller must hold local->sta_bss_lock */
2148 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2149                                         struct ieee80211_sta_bss *bss)
2150 {
2151         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2152         u8 hash_idx;
2153
2154         if (bss_mesh_cfg(bss))
2155                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2156                                         bss_mesh_id_len(bss));
2157         else
2158                 hash_idx = STA_HASH(bss->bssid);
2159
2160         bss->hnext = local->sta_bss_hash[hash_idx];
2161         local->sta_bss_hash[hash_idx] = bss;
2162 }
2163
2164
2165 /* Caller must hold local->sta_bss_lock */
2166 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2167                                         struct ieee80211_sta_bss *bss)
2168 {
2169         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2170         struct ieee80211_sta_bss *b, *prev = NULL;
2171         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2172         while (b) {
2173                 if (b == bss) {
2174                         if (!prev)
2175                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2176                                         bss->hnext;
2177                         else
2178                                 prev->hnext = bss->hnext;
2179                         break;
2180                 }
2181                 prev = b;
2182                 b = b->hnext;
2183         }
2184 }
2185
2186
2187 static struct ieee80211_sta_bss *
2188 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2189                      u8 *ssid, u8 ssid_len)
2190 {
2191         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2192         struct ieee80211_sta_bss *bss;
2193
2194         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2195         if (!bss)
2196                 return NULL;
2197         atomic_inc(&bss->users);
2198         atomic_inc(&bss->users);
2199         memcpy(bss->bssid, bssid, ETH_ALEN);
2200         bss->freq = freq;
2201         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2202                 memcpy(bss->ssid, ssid, ssid_len);
2203                 bss->ssid_len = ssid_len;
2204         }
2205
2206         spin_lock_bh(&local->sta_bss_lock);
2207         /* TODO: order by RSSI? */
2208         list_add_tail(&bss->list, &local->sta_bss_list);
2209         __ieee80211_rx_bss_hash_add(dev, bss);
2210         spin_unlock_bh(&local->sta_bss_lock);
2211         return bss;
2212 }
2213
2214 static struct ieee80211_sta_bss *
2215 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2216                      u8 *ssid, u8 ssid_len)
2217 {
2218         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2219         struct ieee80211_sta_bss *bss;
2220
2221         spin_lock_bh(&local->sta_bss_lock);
2222         bss = local->sta_bss_hash[STA_HASH(bssid)];
2223         while (bss) {
2224                 if (!bss_mesh_cfg(bss) &&
2225                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2226                     bss->freq == freq &&
2227                     bss->ssid_len == ssid_len &&
2228                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_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 #ifdef CONFIG_MAC80211_MESH
2239 static struct ieee80211_sta_bss *
2240 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2241                           u8 *mesh_cfg, int freq)
2242 {
2243         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2244         struct ieee80211_sta_bss *bss;
2245
2246         spin_lock_bh(&local->sta_bss_lock);
2247         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2248         while (bss) {
2249                 if (bss_mesh_cfg(bss) &&
2250                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2251                     bss->freq == freq &&
2252                     mesh_id_len == bss->mesh_id_len &&
2253                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2254                                                  mesh_id_len))) {
2255                         atomic_inc(&bss->users);
2256                         break;
2257                 }
2258                 bss = bss->hnext;
2259         }
2260         spin_unlock_bh(&local->sta_bss_lock);
2261         return bss;
2262 }
2263
2264 static struct ieee80211_sta_bss *
2265 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2266                           u8 *mesh_cfg, int mesh_config_len, int freq)
2267 {
2268         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2269         struct ieee80211_sta_bss *bss;
2270
2271         if (mesh_config_len != MESH_CFG_LEN)
2272                 return NULL;
2273
2274         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2275         if (!bss)
2276                 return NULL;
2277
2278         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2279         if (!bss->mesh_cfg) {
2280                 kfree(bss);
2281                 return NULL;
2282         }
2283
2284         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2285                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2286                 if (!bss->mesh_id) {
2287                         kfree(bss->mesh_cfg);
2288                         kfree(bss);
2289                         return NULL;
2290                 }
2291                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2292         }
2293
2294         atomic_inc(&bss->users);
2295         atomic_inc(&bss->users);
2296         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2297         bss->mesh_id_len = mesh_id_len;
2298         bss->freq = freq;
2299         spin_lock_bh(&local->sta_bss_lock);
2300         /* TODO: order by RSSI? */
2301         list_add_tail(&bss->list, &local->sta_bss_list);
2302         __ieee80211_rx_bss_hash_add(dev, bss);
2303         spin_unlock_bh(&local->sta_bss_lock);
2304         return bss;
2305 }
2306 #endif
2307
2308 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2309 {
2310         kfree(bss->wpa_ie);
2311         kfree(bss->rsn_ie);
2312         kfree(bss->wmm_ie);
2313         kfree(bss->ht_ie);
2314         kfree(bss->ht_add_ie);
2315         kfree(bss_mesh_id(bss));
2316         kfree(bss_mesh_cfg(bss));
2317         kfree(bss);
2318 }
2319
2320
2321 static void ieee80211_rx_bss_put(struct net_device *dev,
2322                                  struct ieee80211_sta_bss *bss)
2323 {
2324         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2325
2326         local_bh_disable();
2327         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2328                 local_bh_enable();
2329                 return;
2330         }
2331
2332         __ieee80211_rx_bss_hash_del(dev, bss);
2333         list_del(&bss->list);
2334         spin_unlock_bh(&local->sta_bss_lock);
2335         ieee80211_rx_bss_free(bss);
2336 }
2337
2338
2339 void ieee80211_rx_bss_list_init(struct net_device *dev)
2340 {
2341         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2342         spin_lock_init(&local->sta_bss_lock);
2343         INIT_LIST_HEAD(&local->sta_bss_list);
2344 }
2345
2346
2347 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2348 {
2349         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2350         struct ieee80211_sta_bss *bss, *tmp;
2351
2352         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2353                 ieee80211_rx_bss_put(dev, bss);
2354 }
2355
2356
2357 static int ieee80211_sta_join_ibss(struct net_device *dev,
2358                                    struct ieee80211_if_sta *ifsta,
2359                                    struct ieee80211_sta_bss *bss)
2360 {
2361         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2362         int res, rates, i, j;
2363         struct sk_buff *skb;
2364         struct ieee80211_mgmt *mgmt;
2365         struct ieee80211_tx_info *control;
2366         struct rate_selection ratesel;
2367         u8 *pos;
2368         struct ieee80211_sub_if_data *sdata;
2369         struct ieee80211_supported_band *sband;
2370         union iwreq_data wrqu;
2371
2372         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2373
2374         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2375
2376         /* Remove possible STA entries from other IBSS networks. */
2377         sta_info_flush_delayed(sdata);
2378
2379         if (local->ops->reset_tsf) {
2380                 /* Reset own TSF to allow time synchronization work. */
2381                 local->ops->reset_tsf(local_to_hw(local));
2382         }
2383         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2384         res = ieee80211_if_config(dev);
2385         if (res)
2386                 return res;
2387
2388         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2389
2390         sdata->drop_unencrypted = bss->capability &
2391                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2392
2393         res = ieee80211_set_freq(dev, bss->freq);
2394
2395         if (res)
2396                 return res;
2397
2398         /* Set beacon template */
2399         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2400         do {
2401                 if (!skb)
2402                         break;
2403
2404                 skb_reserve(skb, local->hw.extra_tx_headroom);
2405
2406                 mgmt = (struct ieee80211_mgmt *)
2407                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2408                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2409                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2410                                                    IEEE80211_STYPE_BEACON);
2411                 memset(mgmt->da, 0xff, ETH_ALEN);
2412                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2413                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2414                 mgmt->u.beacon.beacon_int =
2415                         cpu_to_le16(local->hw.conf.beacon_int);
2416                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2417
2418                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2419                 *pos++ = WLAN_EID_SSID;
2420                 *pos++ = ifsta->ssid_len;
2421                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2422
2423                 rates = bss->supp_rates_len;
2424                 if (rates > 8)
2425                         rates = 8;
2426                 pos = skb_put(skb, 2 + rates);
2427                 *pos++ = WLAN_EID_SUPP_RATES;
2428                 *pos++ = rates;
2429                 memcpy(pos, bss->supp_rates, rates);
2430
2431                 if (bss->band == IEEE80211_BAND_2GHZ) {
2432                         pos = skb_put(skb, 2 + 1);
2433                         *pos++ = WLAN_EID_DS_PARAMS;
2434                         *pos++ = 1;
2435                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2436                 }
2437
2438                 pos = skb_put(skb, 2 + 2);
2439                 *pos++ = WLAN_EID_IBSS_PARAMS;
2440                 *pos++ = 2;
2441                 /* FIX: set ATIM window based on scan results */
2442                 *pos++ = 0;
2443                 *pos++ = 0;
2444
2445                 if (bss->supp_rates_len > 8) {
2446                         rates = bss->supp_rates_len - 8;
2447                         pos = skb_put(skb, 2 + rates);
2448                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2449                         *pos++ = rates;
2450                         memcpy(pos, &bss->supp_rates[8], rates);
2451                 }
2452
2453                 control = IEEE80211_SKB_CB(skb);
2454
2455                 rate_control_get_rate(dev, sband, skb, &ratesel);
2456                 if (ratesel.rate_idx < 0) {
2457                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2458                                "for IBSS beacon\n", dev->name);
2459                         break;
2460                 }
2461                 control->control.vif = &sdata->vif;
2462                 control->tx_rate_idx = ratesel.rate_idx;
2463                 if (sdata->bss_conf.use_short_preamble &&
2464                     sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2465                         control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2466                 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2467                 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2468                 control->control.retry_limit = 1;
2469
2470                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2471                 if (ifsta->probe_resp) {
2472                         mgmt = (struct ieee80211_mgmt *)
2473                                 ifsta->probe_resp->data;
2474                         mgmt->frame_control =
2475                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2476                                              IEEE80211_STYPE_PROBE_RESP);
2477                 } else {
2478                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2479                                "template for IBSS\n", dev->name);
2480                 }
2481
2482                 if (local->ops->beacon_update &&
2483                     local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2484                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2485                                "template\n", dev->name);
2486                         skb = NULL;
2487                 }
2488
2489                 rates = 0;
2490                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2491                 for (i = 0; i < bss->supp_rates_len; i++) {
2492                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2493                         for (j = 0; j < sband->n_bitrates; j++)
2494                                 if (sband->bitrates[j].bitrate == bitrate)
2495                                         rates |= BIT(j);
2496                 }
2497                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2498
2499                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2500         } while (0);
2501
2502         if (skb) {
2503                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2504                        "template\n", dev->name);
2505                 dev_kfree_skb(skb);
2506         }
2507
2508         ifsta->state = IEEE80211_IBSS_JOINED;
2509         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2510
2511         memset(&wrqu, 0, sizeof(wrqu));
2512         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2513         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2514
2515         return res;
2516 }
2517
2518 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2519                             struct ieee802_11_elems *elems,
2520                             enum ieee80211_band band)
2521 {
2522         struct ieee80211_supported_band *sband;
2523         struct ieee80211_rate *bitrates;
2524         size_t num_rates;
2525         u64 supp_rates;
2526         int i, j;
2527         sband = local->hw.wiphy->bands[band];
2528
2529         if (!sband) {
2530                 WARN_ON(1);
2531                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2532         }
2533
2534         bitrates = sband->bitrates;
2535         num_rates = sband->n_bitrates;
2536         supp_rates = 0;
2537         for (i = 0; i < elems->supp_rates_len +
2538                      elems->ext_supp_rates_len; i++) {
2539                 u8 rate = 0;
2540                 int own_rate;
2541                 if (i < elems->supp_rates_len)
2542                         rate = elems->supp_rates[i];
2543                 else if (elems->ext_supp_rates)
2544                         rate = elems->ext_supp_rates
2545                                 [i - elems->supp_rates_len];
2546                 own_rate = 5 * (rate & 0x7f);
2547                 for (j = 0; j < num_rates; j++)
2548                         if (bitrates[j].bitrate == own_rate)
2549                                 supp_rates |= BIT(j);
2550         }
2551         return supp_rates;
2552 }
2553
2554
2555 static void ieee80211_rx_bss_info(struct net_device *dev,
2556                                   struct ieee80211_mgmt *mgmt,
2557                                   size_t len,
2558                                   struct ieee80211_rx_status *rx_status,
2559                                   int beacon)
2560 {
2561         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2562         struct ieee802_11_elems elems;
2563         size_t baselen;
2564         int freq, clen;
2565         struct ieee80211_sta_bss *bss;
2566         struct sta_info *sta;
2567         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2568         u64 beacon_timestamp, rx_timestamp;
2569         struct ieee80211_channel *channel;
2570         DECLARE_MAC_BUF(mac);
2571         DECLARE_MAC_BUF(mac2);
2572
2573         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2574                 return; /* ignore ProbeResp to foreign address */
2575
2576 #if 0
2577         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2578                dev->name, beacon ? "Beacon" : "Probe Response",
2579                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2580 #endif
2581
2582         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2583         if (baselen > len)
2584                 return;
2585
2586         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2587         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2588
2589         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2590             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2591                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2592                                                 rx_status->band);
2593
2594                 mesh_neighbour_update(mgmt->sa, rates, dev,
2595                                       mesh_peer_accepts_plinks(&elems, dev));
2596         }
2597
2598         rcu_read_lock();
2599
2600         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2601             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2602             (sta = sta_info_get(local, mgmt->sa))) {
2603                 u64 prev_rates;
2604                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2605                                                         rx_status->band);
2606
2607                 prev_rates = sta->supp_rates[rx_status->band];
2608                 sta->supp_rates[rx_status->band] &= supp_rates;
2609                 if (sta->supp_rates[rx_status->band] == 0) {
2610                         /* No matching rates - this should not really happen.
2611                          * Make sure that at least one rate is marked
2612                          * supported to avoid issues with TX rate ctrl. */
2613                         sta->supp_rates[rx_status->band] =
2614                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2615                 }
2616                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2617                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2618                                "%s based on beacon info (0x%llx & 0x%llx -> "
2619                                "0x%llx)\n",
2620                                dev->name, print_mac(mac, sta->addr),
2621                                (unsigned long long) prev_rates,
2622                                (unsigned long long) supp_rates,
2623                                (unsigned long long) sta->supp_rates[rx_status->band]);
2624                 }
2625         }
2626
2627         rcu_read_unlock();
2628
2629         if (elems.ds_params && elems.ds_params_len == 1)
2630                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2631         else
2632                 freq = rx_status->freq;
2633
2634         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2635
2636         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2637                 return;
2638
2639 #ifdef CONFIG_MAC80211_MESH
2640         if (elems.mesh_config)
2641                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2642                                 elems.mesh_id_len, elems.mesh_config, freq);
2643         else
2644 #endif
2645                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2646                                            elems.ssid, elems.ssid_len);
2647         if (!bss) {
2648 #ifdef CONFIG_MAC80211_MESH
2649                 if (elems.mesh_config)
2650                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2651                                 elems.mesh_id_len, elems.mesh_config,
2652                                 elems.mesh_config_len, freq);
2653                 else
2654 #endif
2655                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2656                                                    elems.ssid, elems.ssid_len);
2657                 if (!bss)
2658                         return;
2659         } else {
2660 #if 0
2661                 /* TODO: order by RSSI? */
2662                 spin_lock_bh(&local->sta_bss_lock);
2663                 list_move_tail(&bss->list, &local->sta_bss_list);
2664                 spin_unlock_bh(&local->sta_bss_lock);
2665 #endif
2666         }
2667
2668         /* save the ERP value so that it is available at association time */
2669         if (elems.erp_info && elems.erp_info_len >= 1) {
2670                 bss->erp_value = elems.erp_info[0];
2671                 bss->has_erp_value = 1;
2672         }
2673
2674         if (elems.ht_cap_elem &&
2675              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2676              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2677                 kfree(bss->ht_ie);
2678                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2679                 if (bss->ht_ie) {
2680                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2681                                 elems.ht_cap_elem_len + 2);
2682                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2683                 } else
2684                         bss->ht_ie_len = 0;
2685         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2686                 kfree(bss->ht_ie);
2687                 bss->ht_ie = NULL;
2688                 bss->ht_ie_len = 0;
2689         }
2690
2691         if (elems.ht_info_elem &&
2692              (!bss->ht_add_ie ||
2693              bss->ht_add_ie_len != elems.ht_info_elem_len ||
2694              memcmp(bss->ht_add_ie, elems.ht_info_elem,
2695                         elems.ht_info_elem_len))) {
2696                 kfree(bss->ht_add_ie);
2697                 bss->ht_add_ie =
2698                         kmalloc(elems.ht_info_elem_len + 2, GFP_ATOMIC);
2699                 if (bss->ht_add_ie) {
2700                         memcpy(bss->ht_add_ie, elems.ht_info_elem - 2,
2701                                 elems.ht_info_elem_len + 2);
2702                         bss->ht_add_ie_len = elems.ht_info_elem_len + 2;
2703                 } else
2704                         bss->ht_add_ie_len = 0;
2705         } else if (!elems.ht_info_elem && bss->ht_add_ie) {
2706                 kfree(bss->ht_add_ie);
2707                 bss->ht_add_ie = NULL;
2708                 bss->ht_add_ie_len = 0;
2709         }
2710
2711         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2712         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2713
2714         bss->supp_rates_len = 0;
2715         if (elems.supp_rates) {
2716                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2717                 if (clen > elems.supp_rates_len)
2718                         clen = elems.supp_rates_len;
2719                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2720                        clen);
2721                 bss->supp_rates_len += clen;
2722         }
2723         if (elems.ext_supp_rates) {
2724                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2725                 if (clen > elems.ext_supp_rates_len)
2726                         clen = elems.ext_supp_rates_len;
2727                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2728                        elems.ext_supp_rates, clen);
2729                 bss->supp_rates_len += clen;
2730         }
2731
2732         bss->band = rx_status->band;
2733
2734         bss->timestamp = beacon_timestamp;
2735         bss->last_update = jiffies;
2736         bss->signal = rx_status->signal;
2737         bss->noise = rx_status->noise;
2738         bss->qual = rx_status->qual;
2739         if (!beacon && !bss->probe_resp)
2740                 bss->probe_resp = true;
2741
2742         /*
2743          * In STA mode, the remaining parameters should not be overridden
2744          * by beacons because they're not necessarily accurate there.
2745          */
2746         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2747             bss->probe_resp && beacon) {
2748                 ieee80211_rx_bss_put(dev, bss);
2749                 return;
2750         }
2751
2752         if (elems.wpa &&
2753             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2754              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2755                 kfree(bss->wpa_ie);
2756                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2757                 if (bss->wpa_ie) {
2758                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2759                         bss->wpa_ie_len = elems.wpa_len + 2;
2760                 } else
2761                         bss->wpa_ie_len = 0;
2762         } else if (!elems.wpa && bss->wpa_ie) {
2763                 kfree(bss->wpa_ie);
2764                 bss->wpa_ie = NULL;
2765                 bss->wpa_ie_len = 0;
2766         }
2767
2768         if (elems.rsn &&
2769             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2770              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2771                 kfree(bss->rsn_ie);
2772                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2773                 if (bss->rsn_ie) {
2774                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2775                         bss->rsn_ie_len = elems.rsn_len + 2;
2776                 } else
2777                         bss->rsn_ie_len = 0;
2778         } else if (!elems.rsn && bss->rsn_ie) {
2779                 kfree(bss->rsn_ie);
2780                 bss->rsn_ie = NULL;
2781                 bss->rsn_ie_len = 0;
2782         }
2783
2784         /*
2785          * Cf.
2786          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2787          *
2788          * quoting:
2789          *
2790          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2791          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2792          * Alliance (September 1, 2004) is incorporated by reference herein.
2793          * The inclusion of the WMM Parameters in probe responses and
2794          * association responses is mandatory for WMM enabled networks. The
2795          * inclusion of the WMM Parameters in beacons, however, is optional.
2796          */
2797
2798         if (elems.wmm_param &&
2799             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2800              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2801                 kfree(bss->wmm_ie);
2802                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2803                 if (bss->wmm_ie) {
2804                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2805                                elems.wmm_param_len + 2);
2806                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2807                 } else
2808                         bss->wmm_ie_len = 0;
2809         } else if (elems.wmm_info &&
2810                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2811                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2812                  /* As for certain AP's Fifth bit is not set in WMM IE in
2813                   * beacon frames.So while parsing the beacon frame the
2814                   * wmm_info structure is used instead of wmm_param.
2815                   * wmm_info structure was never used to set bss->wmm_ie.
2816                   * This code fixes this problem by copying the WME
2817                   * information from wmm_info to bss->wmm_ie and enabling
2818                   * n-band association.
2819                   */
2820                 kfree(bss->wmm_ie);
2821                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2822                 if (bss->wmm_ie) {
2823                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2824                                elems.wmm_info_len + 2);
2825                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2826                 } else
2827                         bss->wmm_ie_len = 0;
2828         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2829                 kfree(bss->wmm_ie);
2830                 bss->wmm_ie = NULL;
2831                 bss->wmm_ie_len = 0;
2832         }
2833
2834         /* check if we need to merge IBSS */
2835         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2836             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2837             bss->capability & WLAN_CAPABILITY_IBSS &&
2838             bss->freq == local->oper_channel->center_freq &&
2839             elems.ssid_len == sdata->u.sta.ssid_len &&
2840             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2841                 if (rx_status->flag & RX_FLAG_TSFT) {
2842                         /* in order for correct IBSS merging we need mactime
2843                          *
2844                          * since mactime is defined as the time the first data
2845                          * symbol of the frame hits the PHY, and the timestamp
2846                          * of the beacon is defined as "the time that the data
2847                          * symbol containing the first bit of the timestamp is
2848                          * transmitted to the PHY plus the transmitting STA’s
2849                          * delays through its local PHY from the MAC-PHY
2850                          * interface to its interface with the WM"
2851                          * (802.11 11.1.2) - equals the time this bit arrives at
2852                          * the receiver - we have to take into account the
2853                          * offset between the two.
2854                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2855                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2856                          */
2857                         int rate = local->hw.wiphy->bands[rx_status->band]->
2858                                         bitrates[rx_status->rate_idx].bitrate;
2859                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2860                 } else if (local && local->ops && local->ops->get_tsf)
2861                         /* second best option: get current TSF */
2862                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2863                 else
2864                         /* can't merge without knowing the TSF */
2865                         rx_timestamp = -1LLU;
2866 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2867                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2868                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2869                        print_mac(mac, mgmt->sa),
2870                        print_mac(mac2, mgmt->bssid),
2871                        (unsigned long long)rx_timestamp,
2872                        (unsigned long long)beacon_timestamp,
2873                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2874                        jiffies);
2875 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2876                 if (beacon_timestamp > rx_timestamp) {
2877 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2878                         if (net_ratelimit())
2879 #endif
2880                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2881                                        "local TSF - IBSS merge with BSSID %s\n",
2882                                        dev->name, print_mac(mac, mgmt->bssid));
2883                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2884                         ieee80211_ibss_add_sta(dev, NULL,
2885                                                mgmt->bssid, mgmt->sa,
2886                                                BIT(rx_status->rate_idx));
2887                 }
2888         }
2889
2890         ieee80211_rx_bss_put(dev, bss);
2891 }
2892
2893
2894 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2895                                          struct ieee80211_mgmt *mgmt,
2896                                          size_t len,
2897                                          struct ieee80211_rx_status *rx_status)
2898 {
2899         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2900 }
2901
2902
2903 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2904                                      struct ieee80211_mgmt *mgmt,
2905                                      size_t len,
2906                                      struct ieee80211_rx_status *rx_status)
2907 {
2908         struct ieee80211_sub_if_data *sdata;
2909         struct ieee80211_if_sta *ifsta;
2910         size_t baselen;
2911         struct ieee802_11_elems elems;
2912         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2913         struct ieee80211_conf *conf = &local->hw.conf;
2914         u32 changed = 0;
2915
2916         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2917
2918         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2919         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2920                 return;
2921         ifsta = &sdata->u.sta;
2922
2923         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2924             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2925                 return;
2926
2927         /* Process beacon from the current BSS */
2928         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2929         if (baselen > len)
2930                 return;
2931
2932         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2933
2934         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2935                                  elems.wmm_param_len);
2936
2937         /* Do not send changes to driver if we are scanning. This removes
2938          * requirement that driver's bss_info_changed function needs to be
2939          * atomic. */
2940         if (local->sta_sw_scanning || local->sta_hw_scanning)
2941                 return;
2942
2943         if (elems.erp_info && elems.erp_info_len >= 1)
2944                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2945         else {
2946                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2947                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2948                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2949         }
2950
2951         if (elems.ht_cap_elem && elems.ht_info_elem &&
2952             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2953                 struct ieee80211_ht_bss_info bss_info;
2954
2955                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2956                                 (struct ieee80211_ht_addt_info *)
2957                                 elems.ht_info_elem, &bss_info);
2958                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2959                                                &bss_info);
2960         }
2961
2962         ieee80211_bss_info_change_notify(sdata, changed);
2963 }
2964
2965
2966 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2967                                         struct ieee80211_if_sta *ifsta,
2968                                         struct ieee80211_mgmt *mgmt,
2969                                         size_t len,
2970                                         struct ieee80211_rx_status *rx_status)
2971 {
2972         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2973         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2974         int tx_last_beacon;
2975         struct sk_buff *skb;
2976         struct ieee80211_mgmt *resp;
2977         u8 *pos, *end;
2978         DECLARE_MAC_BUF(mac);
2979 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2980         DECLARE_MAC_BUF(mac2);
2981         DECLARE_MAC_BUF(mac3);
2982 #endif
2983
2984         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2985             ifsta->state != IEEE80211_IBSS_JOINED ||
2986             len < 24 + 2 || !ifsta->probe_resp)
2987                 return;
2988
2989         if (local->ops->tx_last_beacon)
2990                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2991         else
2992                 tx_last_beacon = 1;
2993
2994 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2995         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2996                "%s (tx_last_beacon=%d)\n",
2997                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2998                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2999 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3000
3001         if (!tx_last_beacon)
3002                 return;
3003
3004         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3005             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3006                 return;
3007
3008         end = ((u8 *) mgmt) + len;
3009         pos = mgmt->u.probe_req.variable;
3010         if (pos[0] != WLAN_EID_SSID ||
3011             pos + 2 + pos[1] > end) {
3012                 if (net_ratelimit()) {
3013                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3014                                "from %s\n",
3015                                dev->name, print_mac(mac, mgmt->sa));
3016                 }
3017                 return;
3018         }
3019         if (pos[1] != 0 &&
3020             (pos[1] != ifsta->ssid_len ||
3021              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3022                 /* Ignore ProbeReq for foreign SSID */
3023                 return;
3024         }
3025
3026         /* Reply with ProbeResp */
3027         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3028         if (!skb)
3029                 return;
3030
3031         resp = (struct ieee80211_mgmt *) skb->data;
3032         memcpy(resp->da, mgmt->sa, ETH_ALEN);
3033 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3034         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3035                dev->name, print_mac(mac, resp->da));
3036 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3037         ieee80211_sta_tx(dev, skb, 0);
3038 }
3039
3040 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3041                                      struct ieee80211_if_sta *ifsta,
3042                                      struct ieee80211_mgmt *mgmt,
3043                                      size_t len,
3044                                      struct ieee80211_rx_status *rx_status)
3045 {
3046         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3047
3048         if (len < IEEE80211_MIN_ACTION_SIZE)
3049                 return;
3050
3051         switch (mgmt->u.action.category) {
3052         case WLAN_CATEGORY_BACK:
3053                 switch (mgmt->u.action.u.addba_req.action_code) {
3054                 case WLAN_ACTION_ADDBA_REQ:
3055                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3056                                    sizeof(mgmt->u.action.u.addba_req)))
3057                                 break;
3058                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3059                         break;
3060                 case WLAN_ACTION_ADDBA_RESP:
3061                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3062                                    sizeof(mgmt->u.action.u.addba_resp)))
3063                                 break;
3064                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3065                         break;
3066                 case WLAN_ACTION_DELBA:
3067                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3068                                    sizeof(mgmt->u.action.u.delba)))
3069                                 break;
3070                         ieee80211_sta_process_delba(dev, mgmt, len);
3071                         break;
3072                 default:
3073                         if (net_ratelimit())
3074                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3075                                         dev->name);
3076                         break;
3077                 }
3078                 break;
3079         case PLINK_CATEGORY:
3080                 if (ieee80211_vif_is_mesh(&sdata->vif))
3081                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3082                 break;
3083         case MESH_PATH_SEL_CATEGORY:
3084                 if (ieee80211_vif_is_mesh(&sdata->vif))
3085                         mesh_rx_path_sel_frame(dev, mgmt, len);
3086                 break;
3087         default:
3088                 if (net_ratelimit())
3089                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
3090                         "category=%d\n", dev->name, mgmt->u.action.category);
3091                 break;
3092         }
3093 }
3094
3095 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3096                            struct ieee80211_rx_status *rx_status)
3097 {
3098         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3099         struct ieee80211_sub_if_data *sdata;
3100         struct ieee80211_if_sta *ifsta;
3101         struct ieee80211_mgmt *mgmt;
3102         u16 fc;
3103
3104         if (skb->len < 24)
3105                 goto fail;
3106
3107         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3108         ifsta = &sdata->u.sta;
3109
3110         mgmt = (struct ieee80211_mgmt *) skb->data;
3111         fc = le16_to_cpu(mgmt->frame_control);
3112
3113         switch (fc & IEEE80211_FCTL_STYPE) {
3114         case IEEE80211_STYPE_PROBE_REQ:
3115         case IEEE80211_STYPE_PROBE_RESP:
3116         case IEEE80211_STYPE_BEACON:
3117         case IEEE80211_STYPE_ACTION:
3118                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3119         case IEEE80211_STYPE_AUTH:
3120         case IEEE80211_STYPE_ASSOC_RESP:
3121         case IEEE80211_STYPE_REASSOC_RESP:
3122         case IEEE80211_STYPE_DEAUTH:
3123         case IEEE80211_STYPE_DISASSOC:
3124                 skb_queue_tail(&ifsta->skb_queue, skb);
3125                 queue_work(local->hw.workqueue, &ifsta->work);
3126                 return;
3127         default:
3128                 printk(KERN_DEBUG "%s: received unknown management frame - "
3129                        "stype=%d\n", dev->name,
3130                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3131                 break;
3132         }
3133
3134  fail:
3135         kfree_skb(skb);
3136 }
3137
3138
3139 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3140                                          struct sk_buff *skb)
3141 {
3142         struct ieee80211_rx_status *rx_status;
3143         struct ieee80211_sub_if_data *sdata;
3144         struct ieee80211_if_sta *ifsta;
3145         struct ieee80211_mgmt *mgmt;
3146         u16 fc;
3147
3148         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3149         ifsta = &sdata->u.sta;
3150
3151         rx_status = (struct ieee80211_rx_status *) skb->cb;
3152         mgmt = (struct ieee80211_mgmt *) skb->data;
3153         fc = le16_to_cpu(mgmt->frame_control);
3154
3155         switch (fc & IEEE80211_FCTL_STYPE) {
3156         case IEEE80211_STYPE_PROBE_REQ:
3157                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3158                                             rx_status);
3159                 break;
3160         case IEEE80211_STYPE_PROBE_RESP:
3161                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3162                 break;
3163         case IEEE80211_STYPE_BEACON:
3164                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3165                 break;
3166         case IEEE80211_STYPE_AUTH:
3167                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3168                 break;
3169         case IEEE80211_STYPE_ASSOC_RESP:
3170                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3171                 break;
3172         case IEEE80211_STYPE_REASSOC_RESP:
3173                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3174                 break;
3175         case IEEE80211_STYPE_DEAUTH:
3176                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3177                 break;
3178         case IEEE80211_STYPE_DISASSOC:
3179                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3180                 break;
3181         case IEEE80211_STYPE_ACTION:
3182                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3183                 break;
3184         }
3185
3186         kfree_skb(skb);
3187 }
3188
3189
3190 ieee80211_rx_result
3191 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3192                       struct ieee80211_rx_status *rx_status)
3193 {
3194         struct ieee80211_mgmt *mgmt;
3195         u16 fc;
3196
3197         if (skb->len < 2)
3198                 return RX_DROP_UNUSABLE;
3199
3200         mgmt = (struct ieee80211_mgmt *) skb->data;
3201         fc = le16_to_cpu(mgmt->frame_control);
3202
3203         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3204                 return RX_CONTINUE;
3205
3206         if (skb->len < 24)
3207                 return RX_DROP_MONITOR;
3208
3209         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3210                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3211                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3212                                                      skb->len, rx_status);
3213                         dev_kfree_skb(skb);
3214                         return RX_QUEUED;
3215                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3216                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3217                                                  rx_status);
3218                         dev_kfree_skb(skb);
3219                         return RX_QUEUED;
3220                 }
3221         }
3222         return RX_CONTINUE;
3223 }
3224
3225
3226 static int ieee80211_sta_active_ibss(struct net_device *dev)
3227 {
3228         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3229         int active = 0;
3230         struct sta_info *sta;
3231         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3232
3233         rcu_read_lock();
3234
3235         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3236                 if (sta->sdata == sdata &&
3237                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3238                                jiffies)) {
3239                         active++;
3240                         break;
3241                 }
3242         }
3243
3244         rcu_read_unlock();
3245
3246         return active;
3247 }
3248
3249
3250 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3251 {
3252         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3253         struct sta_info *sta, *tmp;
3254         LIST_HEAD(tmp_list);
3255         DECLARE_MAC_BUF(mac);
3256         unsigned long flags;
3257
3258         spin_lock_irqsave(&local->sta_lock, flags);
3259         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3260                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3261                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3262                                dev->name, print_mac(mac, sta->addr));
3263                         __sta_info_unlink(&sta);
3264                         if (sta)
3265                                 list_add(&sta->list, &tmp_list);
3266                 }
3267         spin_unlock_irqrestore(&local->sta_lock, flags);
3268
3269         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3270                 sta_info_destroy(sta);
3271 }
3272
3273
3274 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3275                                      struct ieee80211_if_sta *ifsta)
3276 {
3277         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3278
3279         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3280         if (ieee80211_sta_active_ibss(dev))
3281                 return;
3282
3283         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3284                "IBSS networks with same SSID (merge)\n", dev->name);
3285         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3286 }
3287
3288
3289 #ifdef CONFIG_MAC80211_MESH
3290 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3291                            struct ieee80211_if_sta *ifsta)
3292 {
3293         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3294         bool free_plinks;
3295
3296         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3297         mesh_path_expire(dev);
3298
3299         free_plinks = mesh_plink_availables(sdata);
3300         if (free_plinks != sdata->u.sta.accepting_plinks)
3301                 ieee80211_if_config_beacon(dev);
3302
3303         mod_timer(&ifsta->timer, jiffies +
3304                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3305 }
3306
3307
3308 void ieee80211_start_mesh(struct net_device *dev)
3309 {
3310         struct ieee80211_if_sta *ifsta;
3311         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3312         ifsta = &sdata->u.sta;
3313         ifsta->state = IEEE80211_MESH_UP;
3314         ieee80211_sta_timer((unsigned long)sdata);
3315 }
3316 #endif
3317
3318
3319 void ieee80211_sta_timer(unsigned long data)
3320 {
3321         struct ieee80211_sub_if_data *sdata =
3322                 (struct ieee80211_sub_if_data *) data;
3323         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3324         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3325
3326         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3327         queue_work(local->hw.workqueue, &ifsta->work);
3328 }
3329
3330 void ieee80211_sta_work(struct work_struct *work)
3331 {
3332         struct ieee80211_sub_if_data *sdata =
3333                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3334         struct net_device *dev = sdata->dev;
3335         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3336         struct ieee80211_if_sta *ifsta;
3337         struct sk_buff *skb;
3338
3339         if (!netif_running(dev))
3340                 return;
3341
3342         if (local->sta_sw_scanning || local->sta_hw_scanning)
3343                 return;
3344
3345         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3346             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3347             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3348                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3349                        "(type=%d)\n", dev->name, sdata->vif.type);
3350                 return;
3351         }
3352         ifsta = &sdata->u.sta;
3353
3354         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3355                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3356
3357 #ifdef CONFIG_MAC80211_MESH
3358         if (ifsta->preq_queue_len &&
3359             time_after(jiffies,
3360                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3361                 mesh_path_start_discovery(dev);
3362 #endif
3363
3364         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3365             ifsta->state != IEEE80211_ASSOCIATE &&
3366             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3367                 if (ifsta->scan_ssid_len)
3368                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3369                 else
3370                         ieee80211_sta_start_scan(dev, NULL, 0);
3371                 return;
3372         }
3373
3374         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3375                 if (ieee80211_sta_config_auth(dev, ifsta))
3376                         return;
3377                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3378         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3379                 return;
3380
3381         switch (ifsta->state) {
3382         case IEEE80211_DISABLED:
3383                 break;
3384         case IEEE80211_AUTHENTICATE:
3385                 ieee80211_authenticate(dev, ifsta);
3386                 break;
3387         case IEEE80211_ASSOCIATE:
3388                 ieee80211_associate(dev, ifsta);
3389                 break;
3390         case IEEE80211_ASSOCIATED:
3391                 ieee80211_associated(dev, ifsta);
3392                 break;
3393         case IEEE80211_IBSS_SEARCH:
3394                 ieee80211_sta_find_ibss(dev, ifsta);
3395                 break;
3396         case IEEE80211_IBSS_JOINED:
3397                 ieee80211_sta_merge_ibss(dev, ifsta);
3398                 break;
3399 #ifdef CONFIG_MAC80211_MESH
3400         case IEEE80211_MESH_UP:
3401                 ieee80211_mesh_housekeeping(dev, ifsta);
3402                 break;
3403 #endif
3404         default:
3405                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3406                        ifsta->state);
3407                 break;
3408         }
3409
3410         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3411                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3412                        "mixed-cell disabled - disassociate\n", dev->name);
3413
3414                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3415                 ieee80211_set_disassoc(dev, ifsta, 0);
3416         }
3417 }
3418
3419
3420 static void ieee80211_sta_reset_auth(struct net_device *dev,
3421                                      struct ieee80211_if_sta *ifsta)
3422 {
3423         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3424
3425         if (local->ops->reset_tsf) {
3426                 /* Reset own TSF to allow time synchronization work. */
3427                 local->ops->reset_tsf(local_to_hw(local));
3428         }
3429
3430         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3431
3432
3433         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3434                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3435         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3436                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3437         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3438                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3439         else
3440                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3441         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3442                ifsta->auth_alg);
3443         ifsta->auth_transaction = -1;
3444         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3445         ifsta->auth_tries = ifsta->assoc_tries = 0;
3446         netif_carrier_off(dev);
3447 }
3448
3449
3450 void ieee80211_sta_req_auth(struct net_device *dev,
3451                             struct ieee80211_if_sta *ifsta)
3452 {
3453         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3454         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3455
3456         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3457                 return;
3458
3459         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3460                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3461             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3462                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3463                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3464                 queue_work(local->hw.workqueue, &ifsta->work);
3465         }
3466 }
3467
3468 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3469                                     const char *ssid, int ssid_len)
3470 {
3471         int tmp, hidden_ssid;
3472
3473         if (ssid_len == ifsta->ssid_len &&
3474             !memcmp(ifsta->ssid, ssid, ssid_len))
3475                 return 1;
3476
3477         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3478                 return 0;
3479
3480         hidden_ssid = 1;
3481         tmp = ssid_len;
3482         while (tmp--) {
3483                 if (ssid[tmp] != '\0') {
3484                         hidden_ssid = 0;
3485                         break;
3486                 }
3487         }
3488
3489         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3490                 return 1;
3491
3492         if (ssid_len == 1 && ssid[0] == ' ')
3493                 return 1;
3494
3495         return 0;
3496 }
3497
3498 static int ieee80211_sta_config_auth(struct net_device *dev,
3499                                      struct ieee80211_if_sta *ifsta)
3500 {
3501         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3502         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3503         struct ieee80211_sta_bss *bss, *selected = NULL;
3504         int top_rssi = 0, freq;
3505
3506         spin_lock_bh(&local->sta_bss_lock);
3507         freq = local->oper_channel->center_freq;
3508         list_for_each_entry(bss, &local->sta_bss_list, list) {
3509                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3510                         continue;
3511
3512                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3513                         IEEE80211_STA_AUTO_BSSID_SEL |
3514                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3515                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3516                      !!sdata->default_key))
3517                         continue;
3518
3519                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3520                     bss->freq != freq)
3521                         continue;
3522
3523                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3524                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3525                         continue;
3526
3527                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3528                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3529                         continue;
3530
3531                 if (!selected || top_rssi < bss->signal) {
3532                         selected = bss;
3533                         top_rssi = bss->signal;
3534                 }
3535         }
3536         if (selected)
3537                 atomic_inc(&selected->users);
3538         spin_unlock_bh(&local->sta_bss_lock);
3539
3540         if (selected) {
3541                 ieee80211_set_freq(dev, selected->freq);
3542                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3543                         ieee80211_sta_set_ssid(dev, selected->ssid,
3544                                                selected->ssid_len);
3545                 ieee80211_sta_set_bssid(dev, selected->bssid);
3546                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3547                 ieee80211_rx_bss_put(dev, selected);
3548                 ifsta->state = IEEE80211_AUTHENTICATE;
3549                 ieee80211_sta_reset_auth(dev, ifsta);
3550                 return 0;
3551         } else {
3552                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3553                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3554                                 ieee80211_sta_start_scan(dev, NULL, 0);
3555                         else
3556                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3557                                                          ifsta->ssid_len);
3558                         ifsta->state = IEEE80211_AUTHENTICATE;
3559                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3560                 } else
3561                         ifsta->state = IEEE80211_DISABLED;
3562         }
3563         return -1;
3564 }
3565
3566
3567 static int ieee80211_sta_create_ibss(struct net_device *dev,
3568                                      struct ieee80211_if_sta *ifsta)
3569 {
3570         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3571         struct ieee80211_sta_bss *bss;
3572         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3573         struct ieee80211_supported_band *sband;
3574         u8 bssid[ETH_ALEN], *pos;
3575         int i;
3576         int ret;
3577         DECLARE_MAC_BUF(mac);
3578
3579 #if 0
3580         /* Easier testing, use fixed BSSID. */
3581         memset(bssid, 0xfe, ETH_ALEN);
3582 #else
3583         /* Generate random, not broadcast, locally administered BSSID. Mix in
3584          * own MAC address to make sure that devices that do not have proper
3585          * random number generator get different BSSID. */
3586         get_random_bytes(bssid, ETH_ALEN);
3587         for (i = 0; i < ETH_ALEN; i++)
3588                 bssid[i] ^= dev->dev_addr[i];
3589         bssid[0] &= ~0x01;
3590         bssid[0] |= 0x02;
3591 #endif
3592
3593         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3594                dev->name, print_mac(mac, bssid));
3595
3596         bss = ieee80211_rx_bss_add(dev, bssid,
3597                                    local->hw.conf.channel->center_freq,
3598                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3599         if (!bss)
3600                 return -ENOMEM;
3601
3602         bss->band = local->hw.conf.channel->band;
3603         sband = local->hw.wiphy->bands[bss->band];
3604
3605         if (local->hw.conf.beacon_int == 0)
3606                 local->hw.conf.beacon_int = 100;
3607         bss->beacon_int = local->hw.conf.beacon_int;
3608         bss->last_update = jiffies;
3609         bss->capability = WLAN_CAPABILITY_IBSS;
3610
3611         if (sdata->default_key)
3612                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3613         else
3614                 sdata->drop_unencrypted = 0;
3615
3616         bss->supp_rates_len = sband->n_bitrates;
3617         pos = bss->supp_rates;
3618         for (i = 0; i < sband->n_bitrates; i++) {
3619                 int rate = sband->bitrates[i].bitrate;
3620                 *pos++ = (u8) (rate / 5);
3621         }
3622
3623         ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3624         ieee80211_rx_bss_put(dev, bss);
3625         return ret;
3626 }
3627
3628
3629 static int ieee80211_sta_find_ibss(struct net_device *dev,
3630                                    struct ieee80211_if_sta *ifsta)
3631 {
3632         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3633         struct ieee80211_sta_bss *bss;
3634         int found = 0;
3635         u8 bssid[ETH_ALEN];
3636         int active_ibss;
3637         DECLARE_MAC_BUF(mac);
3638         DECLARE_MAC_BUF(mac2);
3639
3640         if (ifsta->ssid_len == 0)
3641                 return -EINVAL;
3642
3643         active_ibss = ieee80211_sta_active_ibss(dev);
3644 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3645         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3646                dev->name, active_ibss);
3647 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3648         spin_lock_bh(&local->sta_bss_lock);
3649         list_for_each_entry(bss, &local->sta_bss_list, list) {
3650                 if (ifsta->ssid_len != bss->ssid_len ||
3651                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3652                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3653                         continue;
3654 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3655                 printk(KERN_DEBUG "   bssid=%s found\n",
3656                        print_mac(mac, bss->bssid));
3657 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3658                 memcpy(bssid, bss->bssid, ETH_ALEN);
3659                 found = 1;
3660                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3661                         break;
3662         }
3663         spin_unlock_bh(&local->sta_bss_lock);
3664
3665 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3666         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3667                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3668 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3669         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3670             (bss = ieee80211_rx_bss_get(dev, bssid,
3671                                         local->hw.conf.channel->center_freq,
3672                                         ifsta->ssid, ifsta->ssid_len))) {
3673                 int ret;
3674                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3675                        " based on configured SSID\n",
3676                        dev->name, print_mac(mac, bssid));
3677                 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3678                 ieee80211_rx_bss_put(dev, bss);
3679                 return ret;
3680         }
3681 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3682         printk(KERN_DEBUG "   did not try to join ibss\n");
3683 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3684
3685         /* Selected IBSS not found in current scan results - try to scan */
3686         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3687             !ieee80211_sta_active_ibss(dev)) {
3688                 mod_timer(&ifsta->timer, jiffies +
3689                                       IEEE80211_IBSS_MERGE_INTERVAL);
3690         } else if (time_after(jiffies, local->last_scan_completed +
3691                               IEEE80211_SCAN_INTERVAL)) {
3692                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3693                        "join\n", dev->name);
3694                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3695                                               ifsta->ssid_len);
3696         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3697                 int interval = IEEE80211_SCAN_INTERVAL;
3698
3699                 if (time_after(jiffies, ifsta->ibss_join_req +
3700                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3701                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3702                             (!(local->oper_channel->flags &
3703                                         IEEE80211_CHAN_NO_IBSS)))
3704                                 return ieee80211_sta_create_ibss(dev, ifsta);
3705                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3706                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3707                                        " %d MHz\n", dev->name,
3708                                        local->hw.conf.channel->center_freq);
3709                         }
3710
3711                         /* No IBSS found - decrease scan interval and continue
3712                          * scanning. */
3713                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3714                 }
3715
3716                 ifsta->state = IEEE80211_IBSS_SEARCH;
3717                 mod_timer(&ifsta->timer, jiffies + interval);
3718                 return 0;
3719         }
3720
3721         return 0;
3722 }
3723
3724
3725 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3726 {
3727         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3728         struct ieee80211_if_sta *ifsta;
3729
3730         if (len > IEEE80211_MAX_SSID_LEN)
3731                 return -EINVAL;
3732
3733         ifsta = &sdata->u.sta;
3734
3735         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3736                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3737         memcpy(ifsta->ssid, ssid, len);
3738         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3739         ifsta->ssid_len = len;
3740
3741         if (len)
3742                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3743         else
3744                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3745         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3746             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3747                 ifsta->ibss_join_req = jiffies;
3748                 ifsta->state = IEEE80211_IBSS_SEARCH;
3749                 return ieee80211_sta_find_ibss(dev, ifsta);
3750         }
3751         return 0;
3752 }
3753
3754
3755 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3756 {
3757         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3758         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3759         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3760         *len = ifsta->ssid_len;
3761         return 0;
3762 }
3763
3764
3765 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3766 {
3767         struct ieee80211_sub_if_data *sdata;
3768         struct ieee80211_if_sta *ifsta;
3769         int res;
3770
3771         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3772         ifsta = &sdata->u.sta;
3773
3774         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3775                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3776                 res = ieee80211_if_config(dev);
3777                 if (res) {
3778                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3779                                "the low-level driver\n", dev->name);
3780                         return res;
3781                 }
3782         }
3783
3784         if (is_valid_ether_addr(bssid))
3785                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3786         else
3787                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3788
3789         return 0;
3790 }
3791
3792
3793 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3794                                     struct ieee80211_sub_if_data *sdata,
3795                                     int powersave)
3796 {
3797         struct sk_buff *skb;
3798         struct ieee80211_hdr *nullfunc;
3799         u16 fc;
3800
3801         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3802         if (!skb) {
3803                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3804                        "frame\n", sdata->dev->name);
3805                 return;
3806         }
3807         skb_reserve(skb, local->hw.extra_tx_headroom);
3808
3809         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3810         memset(nullfunc, 0, 24);
3811         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3812              IEEE80211_FCTL_TODS;
3813         if (powersave)
3814                 fc |= IEEE80211_FCTL_PM;
3815         nullfunc->frame_control = cpu_to_le16(fc);
3816         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3817         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3818         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3819
3820         ieee80211_sta_tx(sdata->dev, skb, 0);
3821 }
3822
3823
3824 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3825 {
3826         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3827             ieee80211_vif_is_mesh(&sdata->vif))
3828                 ieee80211_sta_timer((unsigned long)sdata);
3829 }
3830
3831 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3832 {
3833         struct ieee80211_local *local = hw_to_local(hw);
3834         struct net_device *dev = local->scan_dev;
3835         struct ieee80211_sub_if_data *sdata;
3836         union iwreq_data wrqu;
3837
3838         local->last_scan_completed = jiffies;
3839         memset(&wrqu, 0, sizeof(wrqu));
3840         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3841
3842         if (local->sta_hw_scanning) {
3843                 local->sta_hw_scanning = 0;
3844                 if (ieee80211_hw_config(local))
3845                         printk(KERN_DEBUG "%s: failed to restore operational "
3846                                "channel after scan\n", dev->name);
3847                 /* Restart STA timer for HW scan case */
3848                 rcu_read_lock();
3849                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3850                         ieee80211_restart_sta_timer(sdata);
3851                 rcu_read_unlock();
3852
3853                 goto done;
3854         }
3855
3856         local->sta_sw_scanning = 0;
3857         if (ieee80211_hw_config(local))
3858                 printk(KERN_DEBUG "%s: failed to restore operational "
3859                        "channel after scan\n", dev->name);
3860
3861
3862         netif_tx_lock_bh(local->mdev);
3863         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3864         local->ops->configure_filter(local_to_hw(local),
3865                                      FIF_BCN_PRBRESP_PROMISC,
3866                                      &local->filter_flags,
3867                                      local->mdev->mc_count,
3868                                      local->mdev->mc_list);
3869
3870         netif_tx_unlock_bh(local->mdev);
3871
3872         rcu_read_lock();
3873         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3874
3875                 /* No need to wake the master device. */
3876                 if (sdata->dev == local->mdev)
3877                         continue;
3878
3879                 /* Tell AP we're back */
3880                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3881                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3882                         ieee80211_send_nullfunc(local, sdata, 0);
3883
3884                 ieee80211_restart_sta_timer(sdata);
3885
3886                 netif_wake_queue(sdata->dev);
3887         }
3888         rcu_read_unlock();
3889
3890 done:
3891         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3892         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3893                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3894                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3895                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3896                     !ieee80211_sta_active_ibss(dev)))
3897                         ieee80211_sta_find_ibss(dev, ifsta);
3898         }
3899 }
3900 EXPORT_SYMBOL(ieee80211_scan_completed);
3901
3902 void ieee80211_sta_scan_work(struct work_struct *work)
3903 {
3904         struct ieee80211_local *local =
3905                 container_of(work, struct ieee80211_local, scan_work.work);
3906         struct net_device *dev = local->scan_dev;
3907         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3908         struct ieee80211_supported_band *sband;
3909         struct ieee80211_channel *chan;
3910         int skip;
3911         unsigned long next_delay = 0;
3912
3913         if (!local->sta_sw_scanning)
3914                 return;
3915
3916         switch (local->scan_state) {
3917         case SCAN_SET_CHANNEL:
3918                 /*
3919                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3920                  * after we successfully scanned the last channel of the last
3921                  * band (and the last band is supported by the hw)
3922                  */
3923                 if (local->scan_band < IEEE80211_NUM_BANDS)
3924                         sband = local->hw.wiphy->bands[local->scan_band];
3925                 else
3926                         sband = NULL;
3927
3928                 /*
3929                  * If we are at an unsupported band and have more bands
3930                  * left to scan, advance to the next supported one.
3931                  */
3932                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3933                         local->scan_band++;
3934                         sband = local->hw.wiphy->bands[local->scan_band];
3935                         local->scan_channel_idx = 0;
3936                 }
3937
3938                 /* if no more bands/channels left, complete scan */
3939                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3940                         ieee80211_scan_completed(local_to_hw(local));
3941                         return;
3942                 }
3943                 skip = 0;
3944                 chan = &sband->channels[local->scan_channel_idx];
3945
3946                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3947                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3948                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3949                         skip = 1;
3950
3951                 if (!skip) {
3952                         local->scan_channel = chan;
3953                         if (ieee80211_hw_config(local)) {
3954                                 printk(KERN_DEBUG "%s: failed to set freq to "
3955                                        "%d MHz for scan\n", dev->name,
3956                                        chan->center_freq);
3957                                 skip = 1;
3958                         }
3959                 }
3960
3961                 /* advance state machine to next channel/band */
3962                 local->scan_channel_idx++;
3963                 if (local->scan_channel_idx >= sband->n_channels) {
3964                         /*
3965                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3966                          * we'll catch that case above and complete the scan
3967                          * if that is the case.
3968                          */
3969                         local->scan_band++;
3970                         local->scan_channel_idx = 0;
3971                 }
3972
3973                 if (skip)
3974                         break;
3975
3976                 next_delay = IEEE80211_PROBE_DELAY +
3977                              usecs_to_jiffies(local->hw.channel_change_time);
3978                 local->scan_state = SCAN_SEND_PROBE;
3979                 break;
3980         case SCAN_SEND_PROBE:
3981                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3982                 local->scan_state = SCAN_SET_CHANNEL;
3983
3984                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3985                         break;
3986                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3987                                          local->scan_ssid_len);
3988                 next_delay = IEEE80211_CHANNEL_TIME;
3989                 break;
3990         }
3991
3992         if (local->sta_sw_scanning)
3993                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3994                                    next_delay);
3995 }
3996
3997
3998 static int ieee80211_sta_start_scan(struct net_device *dev,
3999                                     u8 *ssid, size_t ssid_len)
4000 {
4001         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4002         struct ieee80211_sub_if_data *sdata;
4003
4004         if (ssid_len > IEEE80211_MAX_SSID_LEN)
4005                 return -EINVAL;
4006
4007         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
4008          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4009          * BSSID: MACAddress
4010          * SSID
4011          * ScanType: ACTIVE, PASSIVE
4012          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4013          *    a Probe frame during active scanning
4014          * ChannelList
4015          * MinChannelTime (>= ProbeDelay), in TU
4016          * MaxChannelTime: (>= MinChannelTime), in TU
4017          */
4018
4019          /* MLME-SCAN.confirm
4020           * BSSDescriptionSet
4021           * ResultCode: SUCCESS, INVALID_PARAMETERS
4022          */
4023
4024         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4025                 if (local->scan_dev == dev)
4026                         return 0;
4027                 return -EBUSY;
4028         }
4029
4030         if (local->ops->hw_scan) {
4031                 int rc = local->ops->hw_scan(local_to_hw(local),
4032                                              ssid, ssid_len);
4033                 if (!rc) {
4034                         local->sta_hw_scanning = 1;
4035                         local->scan_dev = dev;
4036                 }
4037                 return rc;
4038         }
4039
4040         local->sta_sw_scanning = 1;
4041
4042         rcu_read_lock();
4043         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4044
4045                 /* Don't stop the master interface, otherwise we can't transmit
4046                  * probes! */
4047                 if (sdata->dev == local->mdev)
4048                         continue;
4049
4050                 netif_stop_queue(sdata->dev);
4051                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4052                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4053                         ieee80211_send_nullfunc(local, sdata, 1);
4054         }
4055         rcu_read_unlock();
4056
4057         if (ssid) {
4058                 local->scan_ssid_len = ssid_len;
4059                 memcpy(local->scan_ssid, ssid, ssid_len);
4060         } else
4061                 local->scan_ssid_len = 0;
4062         local->scan_state = SCAN_SET_CHANNEL;
4063         local->scan_channel_idx = 0;
4064         local->scan_band = IEEE80211_BAND_2GHZ;
4065         local->scan_dev = dev;
4066
4067         netif_tx_lock_bh(local->mdev);
4068         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4069         local->ops->configure_filter(local_to_hw(local),
4070                                      FIF_BCN_PRBRESP_PROMISC,
4071                                      &local->filter_flags,
4072                                      local->mdev->mc_count,
4073                                      local->mdev->mc_list);
4074         netif_tx_unlock_bh(local->mdev);
4075
4076         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4077         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4078                            IEEE80211_CHANNEL_TIME);
4079
4080         return 0;
4081 }
4082
4083
4084 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4085 {
4086         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4087         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4088         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4089
4090         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4091                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4092
4093         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4094                 if (local->scan_dev == dev)
4095                         return 0;
4096                 return -EBUSY;
4097         }
4098
4099         ifsta->scan_ssid_len = ssid_len;
4100         if (ssid_len)
4101                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4102         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4103         queue_work(local->hw.workqueue, &ifsta->work);
4104         return 0;
4105 }
4106
4107 static char *
4108 ieee80211_sta_scan_result(struct net_device *dev,
4109                           struct iw_request_info *info,
4110                           struct ieee80211_sta_bss *bss,
4111                           char *current_ev, char *end_buf)
4112 {
4113         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4114         struct iw_event iwe;
4115
4116         if (time_after(jiffies,
4117                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4118                 return current_ev;
4119
4120         memset(&iwe, 0, sizeof(iwe));
4121         iwe.cmd = SIOCGIWAP;
4122         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4123         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4124         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4125                                           IW_EV_ADDR_LEN);
4126
4127         memset(&iwe, 0, sizeof(iwe));
4128         iwe.cmd = SIOCGIWESSID;
4129         if (bss_mesh_cfg(bss)) {
4130                 iwe.u.data.length = bss_mesh_id_len(bss);
4131                 iwe.u.data.flags = 1;
4132                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4133                                                   &iwe, bss_mesh_id(bss));
4134         } else {
4135                 iwe.u.data.length = bss->ssid_len;
4136                 iwe.u.data.flags = 1;
4137                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4138                                                   &iwe, bss->ssid);
4139         }
4140
4141         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4142             || bss_mesh_cfg(bss)) {
4143                 memset(&iwe, 0, sizeof(iwe));
4144                 iwe.cmd = SIOCGIWMODE;
4145                 if (bss_mesh_cfg(bss))
4146                         iwe.u.mode = IW_MODE_MESH;
4147                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4148                         iwe.u.mode = IW_MODE_MASTER;
4149                 else
4150                         iwe.u.mode = IW_MODE_ADHOC;
4151                 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4152                                                   &iwe, IW_EV_UINT_LEN);
4153         }
4154
4155         memset(&iwe, 0, sizeof(iwe));
4156         iwe.cmd = SIOCGIWFREQ;
4157         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4158         iwe.u.freq.e = 0;
4159         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4160                                           IW_EV_FREQ_LEN);
4161
4162         memset(&iwe, 0, sizeof(iwe));
4163         iwe.cmd = SIOCGIWFREQ;
4164         iwe.u.freq.m = bss->freq;
4165         iwe.u.freq.e = 6;
4166         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4167                                           IW_EV_FREQ_LEN);
4168         memset(&iwe, 0, sizeof(iwe));
4169         iwe.cmd = IWEVQUAL;
4170         iwe.u.qual.qual = bss->qual;
4171         iwe.u.qual.level = bss->signal;
4172         iwe.u.qual.noise = bss->noise;
4173         iwe.u.qual.updated = local->wstats_flags;
4174         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4175                                           IW_EV_QUAL_LEN);
4176
4177         memset(&iwe, 0, sizeof(iwe));
4178         iwe.cmd = SIOCGIWENCODE;
4179         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4180                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4181         else
4182                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4183         iwe.u.data.length = 0;
4184         current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4185                                           &iwe, "");
4186
4187         if (bss && bss->wpa_ie) {
4188                 memset(&iwe, 0, sizeof(iwe));
4189                 iwe.cmd = IWEVGENIE;
4190                 iwe.u.data.length = bss->wpa_ie_len;
4191                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4192                                                   &iwe, bss->wpa_ie);
4193         }
4194
4195         if (bss && bss->rsn_ie) {
4196                 memset(&iwe, 0, sizeof(iwe));
4197                 iwe.cmd = IWEVGENIE;
4198                 iwe.u.data.length = bss->rsn_ie_len;
4199                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4200                                                   &iwe, bss->rsn_ie);
4201         }
4202
4203         if (bss && bss->ht_ie) {
4204                 memset(&iwe, 0, sizeof(iwe));
4205                 iwe.cmd = IWEVGENIE;
4206                 iwe.u.data.length = bss->ht_ie_len;
4207                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4208                                                   &iwe, bss->ht_ie);
4209         }
4210
4211         if (bss && bss->supp_rates_len > 0) {
4212                 /* display all supported rates in readable format */
4213                 char *p = current_ev + iwe_stream_lcp_len(info);
4214                 int i;
4215
4216                 memset(&iwe, 0, sizeof(iwe));
4217                 iwe.cmd = SIOCGIWRATE;
4218                 /* Those two flags are ignored... */
4219                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4220
4221                 for (i = 0; i < bss->supp_rates_len; i++) {
4222                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4223                                                         0x7f) * 500000);
4224                         p = iwe_stream_add_value(info, current_ev, p,
4225                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4226                 }
4227                 current_ev = p;
4228         }
4229
4230         if (bss) {
4231                 char *buf;
4232                 buf = kmalloc(30, GFP_ATOMIC);
4233                 if (buf) {
4234                         memset(&iwe, 0, sizeof(iwe));
4235                         iwe.cmd = IWEVCUSTOM;
4236                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4237                         iwe.u.data.length = strlen(buf);
4238                         current_ev = iwe_stream_add_point(info, current_ev,
4239                                                           end_buf,
4240                                                           &iwe, buf);
4241                         kfree(buf);
4242                 }
4243         }
4244
4245         if (bss_mesh_cfg(bss)) {
4246                 char *buf;
4247                 u8 *cfg = bss_mesh_cfg(bss);
4248                 buf = kmalloc(50, GFP_ATOMIC);
4249                 if (buf) {
4250                         memset(&iwe, 0, sizeof(iwe));
4251                         iwe.cmd = IWEVCUSTOM;
4252                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4253                         iwe.u.data.length = strlen(buf);
4254                         current_ev = iwe_stream_add_point(info, current_ev,
4255                                                           end_buf,
4256                                                           &iwe, buf);
4257                         sprintf(buf, "Path Selection Protocol ID: "
4258                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4259                                                         cfg[4]);
4260                         iwe.u.data.length = strlen(buf);
4261                         current_ev = iwe_stream_add_point(info, current_ev,
4262                                                           end_buf,
4263                                                           &iwe, buf);
4264                         sprintf(buf, "Path Selection Metric ID: "
4265                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4266                                                         cfg[8]);
4267                         iwe.u.data.length = strlen(buf);
4268                         current_ev = iwe_stream_add_point(info, current_ev,
4269                                                           end_buf,
4270                                                           &iwe, buf);
4271                         sprintf(buf, "Congestion Control Mode ID: "
4272                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4273                                                         cfg[11], cfg[12]);
4274                         iwe.u.data.length = strlen(buf);
4275                         current_ev = iwe_stream_add_point(info, current_ev,
4276                                                           end_buf,
4277                                                           &iwe, buf);
4278                         sprintf(buf, "Channel Precedence: "
4279                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4280                                                         cfg[15], cfg[16]);
4281                         iwe.u.data.length = strlen(buf);
4282                         current_ev = iwe_stream_add_point(info, current_ev,
4283                                                           end_buf,
4284                                                           &iwe, buf);
4285                         kfree(buf);
4286                 }
4287         }
4288
4289         return current_ev;
4290 }
4291
4292
4293 int ieee80211_sta_scan_results(struct net_device *dev,
4294                                struct iw_request_info *info,
4295                                char *buf, size_t len)
4296 {
4297         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4298         char *current_ev = buf;
4299         char *end_buf = buf + len;
4300         struct ieee80211_sta_bss *bss;
4301
4302         spin_lock_bh(&local->sta_bss_lock);
4303         list_for_each_entry(bss, &local->sta_bss_list, list) {
4304                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4305                         spin_unlock_bh(&local->sta_bss_lock);
4306                         return -E2BIG;
4307                 }
4308                 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4309                                                        current_ev, end_buf);
4310         }
4311         spin_unlock_bh(&local->sta_bss_lock);
4312         return current_ev - buf;
4313 }
4314
4315
4316 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4317 {
4318         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4319         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4320
4321         kfree(ifsta->extra_ie);
4322         if (len == 0) {
4323                 ifsta->extra_ie = NULL;
4324                 ifsta->extra_ie_len = 0;
4325                 return 0;
4326         }
4327         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4328         if (!ifsta->extra_ie) {
4329                 ifsta->extra_ie_len = 0;
4330                 return -ENOMEM;
4331         }
4332         memcpy(ifsta->extra_ie, ie, len);
4333         ifsta->extra_ie_len = len;
4334         return 0;
4335 }
4336
4337
4338 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4339                                         struct sk_buff *skb, u8 *bssid,
4340                                         u8 *addr, u64 supp_rates)
4341 {
4342         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4343         struct sta_info *sta;
4344         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4345         DECLARE_MAC_BUF(mac);
4346         int band = local->hw.conf.channel->band;
4347
4348         /* TODO: Could consider removing the least recently used entry and
4349          * allow new one to be added. */
4350         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4351                 if (net_ratelimit()) {
4352                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4353                                "entry %s\n", dev->name, print_mac(mac, addr));
4354                 }
4355                 return NULL;
4356         }
4357
4358         if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4359                 return NULL;
4360
4361         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4362                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4363
4364         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4365         if (!sta)
4366                 return NULL;
4367
4368         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4369
4370         if (supp_rates)
4371                 sta->supp_rates[band] = supp_rates;
4372         else
4373                 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4374
4375         rate_control_rate_init(sta, local);
4376
4377         if (sta_info_insert(sta))
4378                 return NULL;
4379
4380         return sta;
4381 }
4382
4383
4384 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4385 {
4386         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4387         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4388
4389         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4390                dev->name, reason);
4391
4392         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4393             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4394                 return -EINVAL;
4395
4396         ieee80211_send_deauth(dev, ifsta, reason);
4397         ieee80211_set_disassoc(dev, ifsta, 1);
4398         return 0;
4399 }
4400
4401
4402 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4403 {
4404         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4405         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4406
4407         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4408                dev->name, reason);
4409
4410         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4411                 return -EINVAL;
4412
4413         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4414                 return -1;
4415
4416         ieee80211_send_disassoc(dev, ifsta, reason);
4417         ieee80211_set_disassoc(dev, ifsta, 0);
4418         return 0;
4419 }
4420
4421 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4422                           enum ieee80211_notification_types  notif_type)
4423 {
4424         struct ieee80211_local *local = hw_to_local(hw);
4425         struct ieee80211_sub_if_data *sdata;
4426
4427         switch (notif_type) {
4428         case IEEE80211_NOTIFY_RE_ASSOC:
4429                 rcu_read_lock();
4430                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4431
4432                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4433                                 ieee80211_sta_req_auth(sdata->dev,
4434                                                        &sdata->u.sta);
4435                         }
4436
4437                 }
4438                 rcu_read_unlock();
4439                 break;
4440         }
4441 }
4442 EXPORT_SYMBOL(ieee80211_notify_mac);