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_VERBOSE_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 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 375                 if (net_ratelimit()) {
 376                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 377                                "%s)\n",
 378                                sdata->dev->name,
 379                                use_protection ? "enabled" : "disabled",
 380                                print_mac(mac, ifsta->bssid));
 381                 }
 382 #endif
 383                 bss_conf->use_cts_prot = use_protection;
 384                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 385         }
 386
 387         if (use_short_preamble != bss_conf->use_short_preamble) {
 388 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 389                 if (net_ratelimit()) {
 390                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 391                                " (BSSID=%s)\n",
 392                                sdata->dev->name,
 393                                use_short_preamble ? "short" : "long",
 394                                print_mac(mac, ifsta->bssid));
 395                 }
 396 #endif
 397                 bss_conf->use_short_preamble = use_short_preamble;
 398                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 399         }
 400
 401         return changed;
 402 }
 403
 404 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 405                                    u8 erp_value)
 406 {
 407         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 408         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 409
 410         return ieee80211_handle_protect_preamb(sdata,
 411                         use_protection, use_short_preamble);
 412 }
 413
 414 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 415                                            struct ieee80211_sta_bss *bss)
 416 {
 417         u32 changed = 0;
 418
 419         if (bss->has_erp_value)
 420                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 421         else {
 422                 u16 capab = bss->capability;
 423                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 424                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 425         }
 426
 427         return changed;
 428 }
 429
 430 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 431                                    struct ieee80211_ht_info *ht_info)
 432 {
 433
 434         if (ht_info == NULL)
 435                 return -EINVAL;
 436
 437         memset(ht_info, 0, sizeof(*ht_info));
 438
 439         if (ht_cap_ie) {
 440                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 441
 442                 ht_info->ht_supported = 1;
 443                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 444                 ht_info->ampdu_factor =
 445                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 446                 ht_info->ampdu_density =
 447                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 448                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 449         } else
 450                 ht_info->ht_supported = 0;
 451
 452         return 0;
 453 }
 454
 455 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 456                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 457                         struct ieee80211_ht_bss_info *bss_info)
 458 {
 459         if (bss_info == NULL)
 460                 return -EINVAL;
 461
 462         memset(bss_info, 0, sizeof(*bss_info));
 463
 464         if (ht_add_info_ie) {
 465                 u16 op_mode;
 466                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 467
 468                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 469                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 470                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 471         }
 472
 473         return 0;
 474 }
 475
 476 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 477                                          struct ieee80211_if_sta *ifsta)
 478 {
 479         char *buf;
 480         size_t len;
 481         int i;
 482         union iwreq_data wrqu;
 483
 484         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 485                 return;
 486
 487         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 488                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 489         if (!buf)
 490                 return;
 491
 492         len = sprintf(buf, "ASSOCINFO(");
 493         if (ifsta->assocreq_ies) {
 494                 len += sprintf(buf + len, "ReqIEs=");
 495                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 496                         len += sprintf(buf + len, "%02x",
 497                                        ifsta->assocreq_ies[i]);
 498                 }
 499         }
 500         if (ifsta->assocresp_ies) {
 501                 if (ifsta->assocreq_ies)
 502                         len += sprintf(buf + len, " ");
 503                 len += sprintf(buf + len, "RespIEs=");
 504                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 505                         len += sprintf(buf + len, "%02x",
 506                                        ifsta->assocresp_ies[i]);
 507                 }
 508         }
 509         len += sprintf(buf + len, ")");
 510
 511         if (len > IW_CUSTOM_MAX) {
 512                 len = sprintf(buf, "ASSOCRESPIE=");
 513                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 514                         len += sprintf(buf + len, "%02x",
 515                                        ifsta->assocresp_ies[i]);
 516                 }
 517         }
 518
 519         memset(&wrqu, 0, sizeof(wrqu));
 520         wrqu.data.length = len;
 521         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 522
 523         kfree(buf);
 524 }
 525
 526
 527 static void ieee80211_set_associated(struct net_device *dev,
 528                                      struct ieee80211_if_sta *ifsta,
 529                                      bool assoc)
 530 {
 531         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 532         struct ieee80211_local *local = sdata->local;
 533         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 534         union iwreq_data wrqu;
 535         u32 changed = BSS_CHANGED_ASSOC;
 536
 537         if (assoc) {
 538                 struct ieee80211_sta_bss *bss;
 539
 540                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 541
 542                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 543                         return;
 544
 545                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 546                                            conf->channel->center_freq,
 547                                            ifsta->ssid, ifsta->ssid_len);
 548                 if (bss) {
 549                         /* set timing information */
 550                         sdata->bss_conf.beacon_int = bss->beacon_int;
 551                         sdata->bss_conf.timestamp = bss->timestamp;
 552
 553                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 554
 555                         ieee80211_rx_bss_put(dev, bss);
 556                 }
 557
 558                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 559                         changed |= BSS_CHANGED_HT;
 560                         sdata->bss_conf.assoc_ht = 1;
 561                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 562                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 563                 }
 564
 565                 netif_carrier_on(dev);
 566                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 567                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 568                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 569                 ieee80211_sta_send_associnfo(dev, ifsta);
 570         } else {
 571                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 572                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 573                 netif_carrier_off(dev);
 574                 ieee80211_reset_erp_info(dev);
 575
 576                 sdata->bss_conf.assoc_ht = 0;
 577                 sdata->bss_conf.ht_conf = NULL;
 578                 sdata->bss_conf.ht_bss_conf = NULL;
 579
 580                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 581         }
 582         ifsta->last_probe = jiffies;
 583         ieee80211_led_assoc(local, assoc);
 584
 585         sdata->bss_conf.assoc = assoc;
 586         ieee80211_bss_info_change_notify(sdata, changed);
 587         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 588         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 589 }
 590
 591 static void ieee80211_set_disassoc(struct net_device *dev,
 592                                    struct ieee80211_if_sta *ifsta, int deauth)
 593 {
 594         if (deauth)
 595                 ifsta->auth_tries = 0;
 596         ifsta->assoc_tries = 0;
 597         ieee80211_set_associated(dev, ifsta, 0);
 598 }
 599
 600 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 601                       int encrypt)
 602 {
 603         struct ieee80211_sub_if_data *sdata;
 604         struct ieee80211_tx_info *info;
 605
 606         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 607         skb->dev = sdata->local->mdev;
 608         skb_set_mac_header(skb, 0);
 609         skb_set_network_header(skb, 0);
 610         skb_set_transport_header(skb, 0);
 611
 612         info = IEEE80211_SKB_CB(skb);
 613         memset(info, 0, sizeof(struct ieee80211_tx_info));
 614         info->control.ifindex = sdata->dev->ifindex;
 615         if (!encrypt)
 616                 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
 617
 618         dev_queue_xmit(skb);
 619 }
 620
 621
 622 static void ieee80211_send_auth(struct net_device *dev,
 623                                 struct ieee80211_if_sta *ifsta,
 624                                 int transaction, u8 *extra, size_t extra_len,
 625                                 int encrypt)
 626 {
 627         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 628         struct sk_buff *skb;
 629         struct ieee80211_mgmt *mgmt;
 630
 631         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 632                             sizeof(*mgmt) + 6 + extra_len);
 633         if (!skb) {
 634                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 635                        "frame\n", dev->name);
 636                 return;
 637         }
 638         skb_reserve(skb, local->hw.extra_tx_headroom);
 639
 640         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 641         memset(mgmt, 0, 24 + 6);
 642         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 643                                            IEEE80211_STYPE_AUTH);
 644         if (encrypt)
 645                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 646         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 647         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 648         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 649         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 650         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 651         ifsta->auth_transaction = transaction + 1;
 652         mgmt->u.auth.status_code = cpu_to_le16(0);
 653         if (extra)
 654                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 655
 656         ieee80211_sta_tx(dev, skb, encrypt);
 657 }
 658
 659
 660 static void ieee80211_authenticate(struct net_device *dev,
 661                                    struct ieee80211_if_sta *ifsta)
 662 {
 663         DECLARE_MAC_BUF(mac);
 664
 665         ifsta->auth_tries++;
 666         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 667                 printk(KERN_DEBUG "%s: authentication with AP %s"
 668                        " timed out\n",
 669                        dev->name, print_mac(mac, ifsta->bssid));
 670                 ifsta->state = IEEE80211_DISABLED;
 671                 return;
 672         }
 673
 674         ifsta->state = IEEE80211_AUTHENTICATE;
 675         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 676                dev->name, print_mac(mac, ifsta->bssid));
 677
 678         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 679
 680         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 681 }
 682
 683 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 684                                       struct ieee80211_supported_band *sband,
 685                                       u64 *rates)
 686 {
 687         int i, j, count;
 688         *rates = 0;
 689         count = 0;
 690         for (i = 0; i < bss->supp_rates_len; i++) {
 691                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 692
 693                 for (j = 0; j < sband->n_bitrates; j++)
 694                         if (sband->bitrates[j].bitrate == rate) {
 695                                 *rates |= BIT(j);
 696                                 count++;
 697                                 break;
 698                         }
 699         }
 700
 701         return count;
 702 }
 703
 704 static void ieee80211_send_assoc(struct net_device *dev,
 705                                  struct ieee80211_if_sta *ifsta)
 706 {
 707         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 708         struct sk_buff *skb;
 709         struct ieee80211_mgmt *mgmt;
 710         u8 *pos, *ies;
 711         int i, len, count, rates_len, supp_rates_len;
 712         u16 capab;
 713         struct ieee80211_sta_bss *bss;
 714         int wmm = 0;
 715         struct ieee80211_supported_band *sband;
 716         u64 rates = 0;
 717
 718         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 719                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 720                             ifsta->ssid_len);
 721         if (!skb) {
 722                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 723                        "frame\n", dev->name);
 724                 return;
 725         }
 726         skb_reserve(skb, local->hw.extra_tx_headroom);
 727
 728         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 729
 730         capab = ifsta->capab;
 731
 732         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 733                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 734                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 735                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 736                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 737         }
 738
 739         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 740                                    local->hw.conf.channel->center_freq,
 741                                    ifsta->ssid, ifsta->ssid_len);
 742         if (bss) {
 743                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 744                         capab |= WLAN_CAPABILITY_PRIVACY;
 745                 if (bss->wmm_ie)
 746                         wmm = 1;
 747
 748                 /* get all rates supported by the device and the AP as
 749                  * some APs don't like getting a superset of their rates
 750                  * in the association request (e.g. D-Link DAP 1353 in
 751                  * b-only mode) */
 752                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 753
 754                 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 755                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 756                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 757
 758                 ieee80211_rx_bss_put(dev, bss);
 759         } else {
 760                 rates = ~0;
 761                 rates_len = sband->n_bitrates;
 762         }
 763
 764         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 765         memset(mgmt, 0, 24);
 766         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 767         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 768         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 769
 770         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 771                 skb_put(skb, 10);
 772                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 773                                                    IEEE80211_STYPE_REASSOC_REQ);
 774                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 775                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 776                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 777                        ETH_ALEN);
 778         } else {
 779                 skb_put(skb, 4);
 780                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 781                                                    IEEE80211_STYPE_ASSOC_REQ);
 782                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 783                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 784         }
 785
 786         /* SSID */
 787         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 788         *pos++ = WLAN_EID_SSID;
 789         *pos++ = ifsta->ssid_len;
 790         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 791
 792         /* add all rates which were marked to be used above */
 793         supp_rates_len = rates_len;
 794         if (supp_rates_len > 8)
 795                 supp_rates_len = 8;
 796
 797         len = sband->n_bitrates;
 798         pos = skb_put(skb, supp_rates_len + 2);
 799         *pos++ = WLAN_EID_SUPP_RATES;
 800         *pos++ = supp_rates_len;
 801
 802         count = 0;
 803         for (i = 0; i < sband->n_bitrates; i++) {
 804                 if (BIT(i) & rates) {
 805                         int rate = sband->bitrates[i].bitrate;
 806                         *pos++ = (u8) (rate / 5);
 807                         if (++count == 8)
 808                                 break;
 809                 }
 810         }
 811
 812         if (count == 8) {
 813                 pos = skb_put(skb, rates_len - count + 2);
 814                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 815                 *pos++ = rates_len - count;
 816
 817                 for (i++; i < sband->n_bitrates; i++) {
 818                         if (BIT(i) & rates) {
 819                                 int rate = sband->bitrates[i].bitrate;
 820                                 *pos++ = (u8) (rate / 5);
 821                         }
 822                 }
 823         }
 824
 825         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 826                 /* 1. power capabilities */
 827                 pos = skb_put(skb, 4);
 828                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 829                 *pos++ = 2;
 830                 *pos++ = 0; /* min tx power */
 831                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
 832
 833                 /* 2. supported channels */
 834                 /* TODO: get this in reg domain format */
 835                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 836                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 837                 *pos++ = 2 * sband->n_channels;
 838                 for (i = 0; i < sband->n_channels; i++) {
 839                         *pos++ = ieee80211_frequency_to_channel(
 840                                         sband->channels[i].center_freq);
 841                         *pos++ = 1; /* one channel in the subband*/
 842                 }
 843         }
 844
 845         if (ifsta->extra_ie) {
 846                 pos = skb_put(skb, ifsta->extra_ie_len);
 847                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 848         }
 849
 850         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 851                 pos = skb_put(skb, 9);
 852                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 853                 *pos++ = 7; /* len */
 854                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 855                 *pos++ = 0x50;
 856                 *pos++ = 0xf2;
 857                 *pos++ = 2; /* WME */
 858                 *pos++ = 0; /* WME info */
 859                 *pos++ = 1; /* WME ver */
 860                 *pos++ = 0;
 861         }
 862
 863         /* wmm support is a must to HT */
 864         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 865             sband->ht_info.ht_supported && bss->ht_add_ie) {
 866                 struct ieee80211_ht_addt_info *ht_add_info =
 867                         (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
 868                 u16 cap = sband->ht_info.cap;
 869                 __le16 tmp;
 870                 u32 flags = local->hw.conf.channel->flags;
 871
 872                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 873                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 874                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 875                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 876                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 877                         }
 878                         break;
 879                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 880                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 881                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 882                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 883                         }
 884                         break;
 885                 }
 886
 887                 tmp = cpu_to_le16(cap);
 888                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 889                 *pos++ = WLAN_EID_HT_CAPABILITY;
 890                 *pos++ = sizeof(struct ieee80211_ht_cap);
 891                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 892                 memcpy(pos, &tmp, sizeof(u16));
 893                 pos += sizeof(u16);
 894                 /* TODO: needs a define here for << 2 */
 895                 *pos++ = sband->ht_info.ampdu_factor |
 896                          (sband->ht_info.ampdu_density << 2);
 897                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 898         }
 899
 900         kfree(ifsta->assocreq_ies);
 901         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 902         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 903         if (ifsta->assocreq_ies)
 904                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 905
 906         ieee80211_sta_tx(dev, skb, 0);
 907 }
 908
 909
 910 static void ieee80211_send_deauth(struct net_device *dev,
 911                                   struct ieee80211_if_sta *ifsta, u16 reason)
 912 {
 913         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 914         struct sk_buff *skb;
 915         struct ieee80211_mgmt *mgmt;
 916
 917         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 918         if (!skb) {
 919                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 920                        "frame\n", dev->name);
 921                 return;
 922         }
 923         skb_reserve(skb, local->hw.extra_tx_headroom);
 924
 925         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 926         memset(mgmt, 0, 24);
 927         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 928         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 929         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 930         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 931                                            IEEE80211_STYPE_DEAUTH);
 932         skb_put(skb, 2);
 933         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 934
 935         ieee80211_sta_tx(dev, skb, 0);
 936 }
 937
 938
 939 static void ieee80211_send_disassoc(struct net_device *dev,
 940                                     struct ieee80211_if_sta *ifsta, u16 reason)
 941 {
 942         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 943         struct sk_buff *skb;
 944         struct ieee80211_mgmt *mgmt;
 945
 946         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 947         if (!skb) {
 948                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 949                        "frame\n", dev->name);
 950                 return;
 951         }
 952         skb_reserve(skb, local->hw.extra_tx_headroom);
 953
 954         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 955         memset(mgmt, 0, 24);
 956         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 957         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 958         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 959         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 960                                            IEEE80211_STYPE_DISASSOC);
 961         skb_put(skb, 2);
 962         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 963
 964         ieee80211_sta_tx(dev, skb, 0);
 965 }
 966
 967
 968 static int ieee80211_privacy_mismatch(struct net_device *dev,
 969                                       struct ieee80211_if_sta *ifsta)
 970 {
 971         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 972         struct ieee80211_sta_bss *bss;
 973         int bss_privacy;
 974         int wep_privacy;
 975         int privacy_invoked;
 976
 977         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 978                 return 0;
 979
 980         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 981                                    local->hw.conf.channel->center_freq,
 982                                    ifsta->ssid, ifsta->ssid_len);
 983         if (!bss)
 984                 return 0;
 985
 986         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 987         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 988         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 989
 990         ieee80211_rx_bss_put(dev, bss);
 991
 992         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 993                 return 0;
 994
 995         return 1;
 996 }
 997
 998
 999 static void ieee80211_associate(struct net_device *dev,
1000                                 struct ieee80211_if_sta *ifsta)
1001 {
1002         DECLARE_MAC_BUF(mac);
1003
1004         ifsta->assoc_tries++;
1005         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1006                 printk(KERN_DEBUG "%s: association with AP %s"
1007                        " timed out\n",
1008                        dev->name, print_mac(mac, ifsta->bssid));
1009                 ifsta->state = IEEE80211_DISABLED;
1010                 return;
1011         }
1012
1013         ifsta->state = IEEE80211_ASSOCIATE;
1014         printk(KERN_DEBUG "%s: associate with AP %s\n",
1015                dev->name, print_mac(mac, ifsta->bssid));
1016         if (ieee80211_privacy_mismatch(dev, ifsta)) {
1017                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1018                        "mixed-cell disabled - abort association\n", dev->name);
1019                 ifsta->state = IEEE80211_DISABLED;
1020                 return;
1021         }
1022
1023         ieee80211_send_assoc(dev, ifsta);
1024
1025         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1026 }
1027
1028
1029 static void ieee80211_associated(struct net_device *dev,
1030                                  struct ieee80211_if_sta *ifsta)
1031 {
1032         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1033         struct sta_info *sta;
1034         int disassoc;
1035         DECLARE_MAC_BUF(mac);
1036
1037         /* TODO: start monitoring current AP signal quality and number of
1038          * missed beacons. Scan other channels every now and then and search
1039          * for better APs. */
1040         /* TODO: remove expired BSSes */
1041
1042         ifsta->state = IEEE80211_ASSOCIATED;
1043
1044         rcu_read_lock();
1045
1046         sta = sta_info_get(local, ifsta->bssid);
1047         if (!sta) {
1048                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1049                        dev->name, print_mac(mac, ifsta->bssid));
1050                 disassoc = 1;
1051         } else {
1052                 disassoc = 0;
1053                 if (time_after(jiffies,
1054                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1055                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1056                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1057                                        "current AP %s - assume out of "
1058                                        "range\n",
1059                                        dev->name, print_mac(mac, ifsta->bssid));
1060                                 disassoc = 1;
1061                                 sta_info_unlink(&sta);
1062                         } else
1063                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1064                                                          local->scan_ssid,
1065                                                          local->scan_ssid_len);
1066                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1067                 } else {
1068                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1069                         if (time_after(jiffies, ifsta->last_probe +
1070                                        IEEE80211_PROBE_INTERVAL)) {
1071                                 ifsta->last_probe = jiffies;
1072                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1073                                                          ifsta->ssid,
1074                                                          ifsta->ssid_len);
1075                         }
1076                 }
1077         }
1078
1079         rcu_read_unlock();
1080
1081         if (disassoc && sta)
1082                 sta_info_destroy(sta);
1083
1084         if (disassoc) {
1085                 ifsta->state = IEEE80211_DISABLED;
1086                 ieee80211_set_associated(dev, ifsta, 0);
1087         } else {
1088                 mod_timer(&ifsta->timer, jiffies +
1089                                       IEEE80211_MONITORING_INTERVAL);
1090         }
1091 }
1092
1093
1094 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1095                                      u8 *ssid, size_t ssid_len)
1096 {
1097         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1098         struct ieee80211_supported_band *sband;
1099         struct sk_buff *skb;
1100         struct ieee80211_mgmt *mgmt;
1101         u8 *pos, *supp_rates, *esupp_rates = NULL;
1102         int i;
1103
1104         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1105         if (!skb) {
1106                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1107                        "request\n", dev->name);
1108                 return;
1109         }
1110         skb_reserve(skb, local->hw.extra_tx_headroom);
1111
1112         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1113         memset(mgmt, 0, 24);
1114         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1115                                            IEEE80211_STYPE_PROBE_REQ);
1116         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1117         if (dst) {
1118                 memcpy(mgmt->da, dst, ETH_ALEN);
1119                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1120         } else {
1121                 memset(mgmt->da, 0xff, ETH_ALEN);
1122                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1123         }
1124         pos = skb_put(skb, 2 + ssid_len);
1125         *pos++ = WLAN_EID_SSID;
1126         *pos++ = ssid_len;
1127         memcpy(pos, ssid, ssid_len);
1128
1129         supp_rates = skb_put(skb, 2);
1130         supp_rates[0] = WLAN_EID_SUPP_RATES;
1131         supp_rates[1] = 0;
1132         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1133
1134         for (i = 0; i < sband->n_bitrates; i++) {
1135                 struct ieee80211_rate *rate = &sband->bitrates[i];
1136                 if (esupp_rates) {
1137                         pos = skb_put(skb, 1);
1138                         esupp_rates[1]++;
1139                 } else if (supp_rates[1] == 8) {
1140                         esupp_rates = skb_put(skb, 3);
1141                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1142                         esupp_rates[1] = 1;
1143                         pos = &esupp_rates[2];
1144                 } else {
1145                         pos = skb_put(skb, 1);
1146                         supp_rates[1]++;
1147                 }
1148                 *pos = rate->bitrate / 5;
1149         }
1150
1151         ieee80211_sta_tx(dev, skb, 0);
1152 }
1153
1154
1155 static int ieee80211_sta_wep_configured(struct net_device *dev)
1156 {
1157         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1158         if (!sdata || !sdata->default_key ||
1159             sdata->default_key->conf.alg != ALG_WEP)
1160                 return 0;
1161         return 1;
1162 }
1163
1164
1165 static void ieee80211_auth_completed(struct net_device *dev,
1166                                      struct ieee80211_if_sta *ifsta)
1167 {
1168         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1169         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1170         ieee80211_associate(dev, ifsta);
1171 }
1172
1173
1174 static void ieee80211_auth_challenge(struct net_device *dev,
1175                                      struct ieee80211_if_sta *ifsta,
1176                                      struct ieee80211_mgmt *mgmt,
1177                                      size_t len)
1178 {
1179         u8 *pos;
1180         struct ieee802_11_elems elems;
1181
1182         pos = mgmt->u.auth.variable;
1183         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1184         if (!elems.challenge)
1185                 return;
1186         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1187                             elems.challenge_len + 2, 1);
1188 }
1189
1190 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1191                                         u8 dialog_token, u16 status, u16 policy,
1192                                         u16 buf_size, u16 timeout)
1193 {
1194         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1195         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1196         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1197         struct sk_buff *skb;
1198         struct ieee80211_mgmt *mgmt;
1199         u16 capab;
1200
1201         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1202
1203         if (!skb) {
1204                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1205                        "for addba resp frame\n", dev->name);
1206                 return;
1207         }
1208
1209         skb_reserve(skb, local->hw.extra_tx_headroom);
1210         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1211         memset(mgmt, 0, 24);
1212         memcpy(mgmt->da, da, ETH_ALEN);
1213         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1214         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1215                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1216         else
1217                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1218         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1219                                            IEEE80211_STYPE_ACTION);
1220
1221         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1222         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1223         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1224         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1225
1226         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1227         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1228         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1229
1230         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1231         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1232         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1233
1234         ieee80211_sta_tx(dev, skb, 0);
1235
1236         return;
1237 }
1238
1239 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1240                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1241                                 u16 agg_size, u16 timeout)
1242 {
1243         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1244         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1245         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1246         struct sk_buff *skb;
1247         struct ieee80211_mgmt *mgmt;
1248         u16 capab;
1249
1250         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1251
1252         if (!skb) {
1253                 printk(KERN_ERR "%s: failed to allocate buffer "
1254                                 "for addba request frame\n", dev->name);
1255                 return;
1256         }
1257         skb_reserve(skb, local->hw.extra_tx_headroom);
1258         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1259         memset(mgmt, 0, 24);
1260         memcpy(mgmt->da, da, ETH_ALEN);
1261         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1262         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1263                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1264         else
1265                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1266
1267         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1268                                         IEEE80211_STYPE_ACTION);
1269
1270         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1271
1272         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1273         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1274
1275         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1276         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1277         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1278         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1279
1280         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1281
1282         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1283         mgmt->u.action.u.addba_req.start_seq_num =
1284                                         cpu_to_le16(start_seq_num << 4);
1285
1286         ieee80211_sta_tx(dev, skb, 0);
1287 }
1288
1289 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1290                                                 struct ieee80211_mgmt *mgmt,
1291                                                 size_t len)
1292 {
1293         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1294         struct ieee80211_hw *hw = &local->hw;
1295         struct ieee80211_conf *conf = &hw->conf;
1296         struct sta_info *sta;
1297         struct tid_ampdu_rx *tid_agg_rx;
1298         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1299         u8 dialog_token;
1300         int ret = -EOPNOTSUPP;
1301         DECLARE_MAC_BUF(mac);
1302
1303         rcu_read_lock();
1304
1305         sta = sta_info_get(local, mgmt->sa);
1306         if (!sta) {
1307                 rcu_read_unlock();
1308                 return;
1309         }
1310
1311         /* extract session parameters from addba request frame */
1312         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1313         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1314         start_seq_num =
1315                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1316
1317         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1318         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1319         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1320         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1321
1322         status = WLAN_STATUS_REQUEST_DECLINED;
1323
1324         /* sanity check for incoming parameters:
1325          * check if configuration can support the BA policy
1326          * and if buffer size does not exceeds max value */
1327         if (((ba_policy != 1)
1328                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1329                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1330                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1331 #ifdef CONFIG_MAC80211_HT_DEBUG
1332                 if (net_ratelimit())
1333                         printk(KERN_DEBUG "AddBA Req with bad params from "
1334                                 "%s on tid %u. policy %d, buffer size %d\n",
1335                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1336                                 buf_size);
1337 #endif /* CONFIG_MAC80211_HT_DEBUG */
1338                 goto end_no_lock;
1339         }
1340         /* determine default buffer size */
1341         if (buf_size == 0) {
1342                 struct ieee80211_supported_band *sband;
1343
1344                 sband = local->hw.wiphy->bands[conf->channel->band];
1345                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1346                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1347         }
1348
1349
1350         /* examine state machine */
1351         spin_lock_bh(&sta->lock);
1352
1353         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1354 #ifdef CONFIG_MAC80211_HT_DEBUG
1355                 if (net_ratelimit())
1356                         printk(KERN_DEBUG "unexpected AddBA Req from "
1357                                 "%s on tid %u\n",
1358                                 print_mac(mac, mgmt->sa), tid);
1359 #endif /* CONFIG_MAC80211_HT_DEBUG */
1360                 goto end;
1361         }
1362
1363         /* prepare A-MPDU MLME for Rx aggregation */
1364         sta->ampdu_mlme.tid_rx[tid] =
1365                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1366         if (!sta->ampdu_mlme.tid_rx[tid]) {
1367 #ifdef CONFIG_MAC80211_HT_DEBUG
1368                 if (net_ratelimit())
1369                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1370                                         tid);
1371 #endif
1372                 goto end;
1373         }
1374         /* rx timer */
1375         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1376                                 sta_rx_agg_session_timer_expired;
1377         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1378                                 (unsigned long)&sta->timer_to_tid[tid];
1379         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1380
1381         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1382
1383         /* prepare reordering buffer */
1384         tid_agg_rx->reorder_buf =
1385                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1386         if (!tid_agg_rx->reorder_buf) {
1387 #ifdef CONFIG_MAC80211_HT_DEBUG
1388                 if (net_ratelimit())
1389                         printk(KERN_ERR "can not allocate reordering buffer "
1390                                "to tid %d\n", tid);
1391 #endif
1392                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1393                 goto end;
1394         }
1395         memset(tid_agg_rx->reorder_buf, 0,
1396                 buf_size * sizeof(struct sk_buff *));
1397
1398         if (local->ops->ampdu_action)
1399                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1400                                                sta->addr, tid, &start_seq_num);
1401 #ifdef CONFIG_MAC80211_HT_DEBUG
1402         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1403 #endif /* CONFIG_MAC80211_HT_DEBUG */
1404
1405         if (ret) {
1406                 kfree(tid_agg_rx->reorder_buf);
1407                 kfree(tid_agg_rx);
1408                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1409                 goto end;
1410         }
1411
1412         /* change state and send addba resp */
1413         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1414         tid_agg_rx->dialog_token = dialog_token;
1415         tid_agg_rx->ssn = start_seq_num;
1416         tid_agg_rx->head_seq_num = start_seq_num;
1417         tid_agg_rx->buf_size = buf_size;
1418         tid_agg_rx->timeout = timeout;
1419         tid_agg_rx->stored_mpdu_num = 0;
1420         status = WLAN_STATUS_SUCCESS;
1421 end:
1422         spin_unlock_bh(&sta->lock);
1423
1424 end_no_lock:
1425         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1426                                   dialog_token, status, 1, buf_size, timeout);
1427         rcu_read_unlock();
1428 }
1429
1430 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1431                                              struct ieee80211_mgmt *mgmt,
1432                                              size_t len)
1433 {
1434         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1435         struct ieee80211_hw *hw = &local->hw;
1436         struct sta_info *sta;
1437         u16 capab;
1438         u16 tid;
1439         u8 *state;
1440
1441         rcu_read_lock();
1442
1443         sta = sta_info_get(local, mgmt->sa);
1444         if (!sta) {
1445                 rcu_read_unlock();
1446                 return;
1447         }
1448
1449         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1450         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1451
1452         state = &sta->ampdu_mlme.tid_state_tx[tid];
1453
1454         spin_lock_bh(&sta->lock);
1455
1456         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1457                 spin_unlock_bh(&sta->lock);
1458                 goto addba_resp_exit;
1459         }
1460
1461         if (mgmt->u.action.u.addba_resp.dialog_token !=
1462                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1463                 spin_unlock_bh(&sta->lock);
1464 #ifdef CONFIG_MAC80211_HT_DEBUG
1465                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1466 #endif /* CONFIG_MAC80211_HT_DEBUG */
1467                 goto addba_resp_exit;
1468         }
1469
1470         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1471 #ifdef CONFIG_MAC80211_HT_DEBUG
1472         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1473 #endif /* CONFIG_MAC80211_HT_DEBUG */
1474         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1475                         == WLAN_STATUS_SUCCESS) {
1476                 *state |= HT_ADDBA_RECEIVED_MSK;
1477                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1478
1479                 if (*state == HT_AGG_STATE_OPERATIONAL)
1480                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1481
1482                 spin_unlock_bh(&sta->lock);
1483         } else {
1484                 sta->ampdu_mlme.addba_req_num[tid]++;
1485                 /* this will allow the state check in stop_BA_session */
1486                 *state = HT_AGG_STATE_OPERATIONAL;
1487                 spin_unlock_bh(&sta->lock);
1488                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1489                                              WLAN_BACK_INITIATOR);
1490         }
1491
1492 addba_resp_exit:
1493         rcu_read_unlock();
1494 }
1495
1496 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1497                           u16 initiator, u16 reason_code)
1498 {
1499         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1500         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1501         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1502         struct sk_buff *skb;
1503         struct ieee80211_mgmt *mgmt;
1504         u16 params;
1505
1506         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1507
1508         if (!skb) {
1509                 printk(KERN_ERR "%s: failed to allocate buffer "
1510                                         "for delba frame\n", dev->name);
1511                 return;
1512         }
1513
1514         skb_reserve(skb, local->hw.extra_tx_headroom);
1515         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1516         memset(mgmt, 0, 24);
1517         memcpy(mgmt->da, da, ETH_ALEN);
1518         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1519         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1520                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1521         else
1522                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1523         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1524                                         IEEE80211_STYPE_ACTION);
1525
1526         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1527
1528         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1529         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1530         params = (u16)(initiator << 11);        /* bit 11 initiator */
1531         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1532
1533         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1534         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1535
1536         ieee80211_sta_tx(dev, skb, 0);
1537 }
1538
1539 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1540                                         u16 initiator, u16 reason)
1541 {
1542         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1543         struct ieee80211_hw *hw = &local->hw;
1544         struct sta_info *sta;
1545         int ret, i;
1546         DECLARE_MAC_BUF(mac);
1547
1548         rcu_read_lock();
1549
1550         sta = sta_info_get(local, ra);
1551         if (!sta) {
1552                 rcu_read_unlock();
1553                 return;
1554         }
1555
1556         /* check if TID is in operational state */
1557         spin_lock_bh(&sta->lock);
1558         if (sta->ampdu_mlme.tid_state_rx[tid]
1559                                 != HT_AGG_STATE_OPERATIONAL) {
1560                 spin_unlock_bh(&sta->lock);
1561                 rcu_read_unlock();
1562                 return;
1563         }
1564         sta->ampdu_mlme.tid_state_rx[tid] =
1565                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1566                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1567         spin_unlock_bh(&sta->lock);
1568
1569         /* stop HW Rx aggregation. ampdu_action existence
1570          * already verified in session init so we add the BUG_ON */
1571         BUG_ON(!local->ops->ampdu_action);
1572
1573 #ifdef CONFIG_MAC80211_HT_DEBUG
1574         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1575                                 print_mac(mac, ra), tid);
1576 #endif /* CONFIG_MAC80211_HT_DEBUG */
1577
1578         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1579                                         ra, tid, NULL);
1580         if (ret)
1581                 printk(KERN_DEBUG "HW problem - can not stop rx "
1582                                 "aggregation for tid %d\n", tid);
1583
1584         /* shutdown timer has not expired */
1585         if (initiator != WLAN_BACK_TIMER)
1586                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1587
1588         /* check if this is a self generated aggregation halt */
1589         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1590                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1591
1592         /* free the reordering buffer */
1593         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1594                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1595                         /* release the reordered frames */
1596                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1597                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1598                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1599                 }
1600         }
1601         /* free resources */
1602         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1603         kfree(sta->ampdu_mlme.tid_rx[tid]);
1604         sta->ampdu_mlme.tid_rx[tid] = NULL;
1605         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1606
1607         rcu_read_unlock();
1608 }
1609
1610
1611 static void ieee80211_sta_process_delba(struct net_device *dev,
1612                         struct ieee80211_mgmt *mgmt, size_t len)
1613 {
1614         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1615         struct sta_info *sta;
1616         u16 tid, params;
1617         u16 initiator;
1618         DECLARE_MAC_BUF(mac);
1619
1620         rcu_read_lock();
1621
1622         sta = sta_info_get(local, mgmt->sa);
1623         if (!sta) {
1624                 rcu_read_unlock();
1625                 return;
1626         }
1627
1628         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1629         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1630         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1631
1632 #ifdef CONFIG_MAC80211_HT_DEBUG
1633         if (net_ratelimit())
1634                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1635                         print_mac(mac, mgmt->sa),
1636                         initiator ? "initiator" : "recipient", tid,
1637                         mgmt->u.action.u.delba.reason_code);
1638 #endif /* CONFIG_MAC80211_HT_DEBUG */
1639
1640         if (initiator == WLAN_BACK_INITIATOR)
1641                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1642                                                  WLAN_BACK_INITIATOR, 0);
1643         else { /* WLAN_BACK_RECIPIENT */
1644                 spin_lock_bh(&sta->lock);
1645                 sta->ampdu_mlme.tid_state_tx[tid] =
1646                                 HT_AGG_STATE_OPERATIONAL;
1647                 spin_unlock_bh(&sta->lock);
1648                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1649                                              WLAN_BACK_RECIPIENT);
1650         }
1651         rcu_read_unlock();
1652 }
1653
1654 /*
1655  * After sending add Block Ack request we activated a timer until
1656  * add Block Ack response will arrive from the recipient.
1657  * If this timer expires sta_addba_resp_timer_expired will be executed.
1658  */
1659 void sta_addba_resp_timer_expired(unsigned long data)
1660 {
1661         /* not an elegant detour, but there is no choice as the timer passes
1662          * only one argument, and both sta_info and TID are needed, so init
1663          * flow in sta_info_create gives the TID as data, while the timer_to_id
1664          * array gives the sta through container_of */
1665         u16 tid = *(u8 *)data;
1666         struct sta_info *temp_sta = container_of((void *)data,
1667                 struct sta_info, timer_to_tid[tid]);
1668
1669         struct ieee80211_local *local = temp_sta->local;
1670         struct ieee80211_hw *hw = &local->hw;
1671         struct sta_info *sta;
1672         u8 *state;
1673
1674         rcu_read_lock();
1675
1676         sta = sta_info_get(local, temp_sta->addr);
1677         if (!sta) {
1678                 rcu_read_unlock();
1679                 return;
1680         }
1681
1682         state = &sta->ampdu_mlme.tid_state_tx[tid];
1683         /* check if the TID waits for addBA response */
1684         spin_lock_bh(&sta->lock);
1685         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1686                 spin_unlock_bh(&sta->lock);
1687                 *state = HT_AGG_STATE_IDLE;
1688 #ifdef CONFIG_MAC80211_HT_DEBUG
1689                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1690                                 "expecting addBA response there", tid);
1691 #endif
1692                 goto timer_expired_exit;
1693         }
1694
1695 #ifdef CONFIG_MAC80211_HT_DEBUG
1696         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1697 #endif
1698
1699         /* go through the state check in stop_BA_session */
1700         *state = HT_AGG_STATE_OPERATIONAL;
1701         spin_unlock_bh(&sta->lock);
1702         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1703                                      WLAN_BACK_INITIATOR);
1704
1705 timer_expired_exit:
1706         rcu_read_unlock();
1707 }
1708
1709 /*
1710  * After accepting the AddBA Request we activated a timer,
1711  * resetting it after each frame that arrives from the originator.
1712  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1713  */
1714 static void sta_rx_agg_session_timer_expired(unsigned long data)
1715 {
1716         /* not an elegant detour, but there is no choice as the timer passes
1717          * only one argument, and various sta_info are needed here, so init
1718          * flow in sta_info_create gives the TID as data, while the timer_to_id
1719          * array gives the sta through container_of */
1720         u8 *ptid = (u8 *)data;
1721         u8 *timer_to_id = ptid - *ptid;
1722         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1723                                          timer_to_tid[0]);
1724
1725 #ifdef CONFIG_MAC80211_HT_DEBUG
1726         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1727 #endif
1728         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1729                                          (u16)*ptid, WLAN_BACK_TIMER,
1730                                          WLAN_REASON_QSTA_TIMEOUT);
1731 }
1732
1733 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1734 {
1735         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1736         int i;
1737
1738         for (i = 0; i <  STA_TID_NUM; i++) {
1739                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1740                                              WLAN_BACK_INITIATOR);
1741                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1742                                                  WLAN_BACK_RECIPIENT,
1743                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1744         }
1745 }
1746
1747 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1748                                         struct ieee80211_msrment_ie *request_ie,
1749                                         const u8 *da, const u8 *bssid,
1750                                         u8 dialog_token)
1751 {
1752         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1753         struct sk_buff *skb;
1754         struct ieee80211_mgmt *msr_report;
1755
1756         skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1757                                 sizeof(struct ieee80211_msrment_ie));
1758
1759         if (!skb) {
1760                 printk(KERN_ERR "%s: failed to allocate buffer for "
1761                                 "measurement report frame\n", dev->name);
1762                 return;
1763         }
1764
1765         skb_reserve(skb, local->hw.extra_tx_headroom);
1766         msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1767         memset(msr_report, 0, 24);
1768         memcpy(msr_report->da, da, ETH_ALEN);
1769         memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1770         memcpy(msr_report->bssid, bssid, ETH_ALEN);
1771         msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1772                                                 IEEE80211_STYPE_ACTION);
1773
1774         skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1775         msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1776         msr_report->u.action.u.measurement.action_code =
1777                                 WLAN_ACTION_SPCT_MSR_RPRT;
1778         msr_report->u.action.u.measurement.dialog_token = dialog_token;
1779
1780         msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1781         msr_report->u.action.u.measurement.length =
1782                         sizeof(struct ieee80211_msrment_ie);
1783
1784         memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1785                 sizeof(struct ieee80211_msrment_ie));
1786         msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1787         msr_report->u.action.u.measurement.msr_elem.mode |=
1788                         IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1789         msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1790
1791         ieee80211_sta_tx(dev, skb, 0);
1792 }
1793
1794 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1795                                                 struct ieee80211_mgmt *mgmt,
1796                                                 size_t len)
1797 {
1798         /*
1799          * Ignoring measurement request is spec violation.
1800          * Mandatory measurements must be reported optional
1801          * measurements might be refused or reported incapable
1802          * For now just refuse
1803          * TODO: Answer basic measurement as unmeasured
1804          */
1805         ieee80211_send_refuse_measurement_request(dev,
1806                         &mgmt->u.action.u.measurement.msr_elem,
1807                         mgmt->sa, mgmt->bssid,
1808                         mgmt->u.action.u.measurement.dialog_token);
1809 }
1810
1811
1812 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1813                                    struct ieee80211_if_sta *ifsta,
1814                                    struct ieee80211_mgmt *mgmt,
1815                                    size_t len)
1816 {
1817         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1818         u16 auth_alg, auth_transaction, status_code;
1819         DECLARE_MAC_BUF(mac);
1820
1821         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1822             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1823                 return;
1824
1825         if (len < 24 + 6)
1826                 return;
1827
1828         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1829             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1830                 return;
1831
1832         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1833             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1834                 return;
1835
1836         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1837         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1838         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1839
1840         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1841                 /*
1842                  * IEEE 802.11 standard does not require authentication in IBSS
1843                  * networks and most implementations do not seem to use it.
1844                  * However, try to reply to authentication attempts if someone
1845                  * has actually implemented this.
1846                  */
1847                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1848                         return;
1849                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1850         }
1851
1852         if (auth_alg != ifsta->auth_alg ||
1853             auth_transaction != ifsta->auth_transaction)
1854                 return;
1855
1856         if (status_code != WLAN_STATUS_SUCCESS) {
1857                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1858                         u8 algs[3];
1859                         const int num_algs = ARRAY_SIZE(algs);
1860                         int i, pos;
1861                         algs[0] = algs[1] = algs[2] = 0xff;
1862                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1863                                 algs[0] = WLAN_AUTH_OPEN;
1864                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1865                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1866                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1867                                 algs[2] = WLAN_AUTH_LEAP;
1868                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1869                                 pos = 0;
1870                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1871                                 pos = 1;
1872                         else
1873                                 pos = 2;
1874                         for (i = 0; i < num_algs; i++) {
1875                                 pos++;
1876                                 if (pos >= num_algs)
1877                                         pos = 0;
1878                                 if (algs[pos] == ifsta->auth_alg ||
1879                                     algs[pos] == 0xff)
1880                                         continue;
1881                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1882                                     !ieee80211_sta_wep_configured(dev))
1883                                         continue;
1884                                 ifsta->auth_alg = algs[pos];
1885                                 break;
1886                         }
1887                 }
1888                 return;
1889         }
1890
1891         switch (ifsta->auth_alg) {
1892         case WLAN_AUTH_OPEN:
1893         case WLAN_AUTH_LEAP:
1894                 ieee80211_auth_completed(dev, ifsta);
1895                 break;
1896         case WLAN_AUTH_SHARED_KEY:
1897                 if (ifsta->auth_transaction == 4)
1898                         ieee80211_auth_completed(dev, ifsta);
1899                 else
1900                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1901                 break;
1902         }
1903 }
1904
1905
1906 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1907                                      struct ieee80211_if_sta *ifsta,
1908                                      struct ieee80211_mgmt *mgmt,
1909                                      size_t len)
1910 {
1911         u16 reason_code;
1912         DECLARE_MAC_BUF(mac);
1913
1914         if (len < 24 + 2)
1915                 return;
1916
1917         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1918                 return;
1919
1920         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1921
1922         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1923                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1924
1925         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1926             ifsta->state == IEEE80211_ASSOCIATE ||
1927             ifsta->state == IEEE80211_ASSOCIATED) {
1928                 ifsta->state = IEEE80211_AUTHENTICATE;
1929                 mod_timer(&ifsta->timer, jiffies +
1930                                       IEEE80211_RETRY_AUTH_INTERVAL);
1931         }
1932
1933         ieee80211_set_disassoc(dev, ifsta, 1);
1934         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1935 }
1936
1937
1938 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1939                                        struct ieee80211_if_sta *ifsta,
1940                                        struct ieee80211_mgmt *mgmt,
1941                                        size_t len)
1942 {
1943         u16 reason_code;
1944         DECLARE_MAC_BUF(mac);
1945
1946         if (len < 24 + 2)
1947                 return;
1948
1949         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1950                 return;
1951
1952         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1953
1954         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1955                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1956
1957         if (ifsta->state == IEEE80211_ASSOCIATED) {
1958                 ifsta->state = IEEE80211_ASSOCIATE;
1959                 mod_timer(&ifsta->timer, jiffies +
1960                                       IEEE80211_RETRY_AUTH_INTERVAL);
1961         }
1962
1963         ieee80211_set_disassoc(dev, ifsta, 0);
1964 }
1965
1966
1967 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1968                                          struct ieee80211_if_sta *ifsta,
1969                                          struct ieee80211_mgmt *mgmt,
1970                                          size_t len,
1971                                          int reassoc)
1972 {
1973         struct ieee80211_local *local = sdata->local;
1974         struct net_device *dev = sdata->dev;
1975         struct ieee80211_supported_band *sband;
1976         struct sta_info *sta;
1977         u64 rates, basic_rates;
1978         u16 capab_info, status_code, aid;
1979         struct ieee802_11_elems elems;
1980         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1981         u8 *pos;
1982         int i, j;
1983         DECLARE_MAC_BUF(mac);
1984         bool have_higher_than_11mbit = false;
1985
1986         /* AssocResp and ReassocResp have identical structure, so process both
1987          * of them in this function. */
1988
1989         if (ifsta->state != IEEE80211_ASSOCIATE)
1990                 return;
1991
1992         if (len < 24 + 6)
1993                 return;
1994
1995         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1996                 return;
1997
1998         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1999         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2000         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2001
2002         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2003                "status=%d aid=%d)\n",
2004                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2005                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2006
2007         if (status_code != WLAN_STATUS_SUCCESS) {
2008                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2009                        dev->name, status_code);
2010                 /* if this was a reassociation, ensure we try a "full"
2011                  * association next time. This works around some broken APs
2012                  * which do not correctly reject reassociation requests. */
2013                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2014                 return;
2015         }
2016
2017         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2018                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2019                        "set\n", dev->name, aid);
2020         aid &= ~(BIT(15) | BIT(14));
2021
2022         pos = mgmt->u.assoc_resp.variable;
2023         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2024
2025         if (!elems.supp_rates) {
2026                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2027                        dev->name);
2028                 return;
2029         }
2030
2031         printk(KERN_DEBUG "%s: associated\n", dev->name);
2032         ifsta->aid = aid;
2033         ifsta->ap_capab = capab_info;
2034
2035         kfree(ifsta->assocresp_ies);
2036         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2037         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2038         if (ifsta->assocresp_ies)
2039                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2040
2041         rcu_read_lock();
2042
2043         /* Add STA entry for the AP */
2044         sta = sta_info_get(local, ifsta->bssid);
2045         if (!sta) {
2046                 struct ieee80211_sta_bss *bss;
2047                 int err;
2048
2049                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2050                 if (!sta) {
2051                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2052                                " the AP\n", dev->name);
2053                         rcu_read_unlock();
2054                         return;
2055                 }
2056                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2057                                            local->hw.conf.channel->center_freq,
2058                                            ifsta->ssid, ifsta->ssid_len);
2059                 if (bss) {
2060                         sta->last_signal = bss->signal;
2061                         sta->last_qual = bss->qual;
2062                         sta->last_noise = bss->noise;
2063                         ieee80211_rx_bss_put(dev, bss);
2064                 }
2065
2066                 err = sta_info_insert(sta);
2067                 if (err) {
2068                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2069                                " the AP (error %d)\n", dev->name, err);
2070                         rcu_read_unlock();
2071                         return;
2072                 }
2073         }
2074
2075         /*
2076          * FIXME: Do we really need to update the sta_info's information here?
2077          *        We already know about the AP (we found it in our list) so it
2078          *        should already be filled with the right info, no?
2079          *        As is stands, all this is racy because typically we assume
2080          *        the information that is filled in here (except flags) doesn't
2081          *        change while a STA structure is alive. As such, it should move
2082          *        to between the sta_info_alloc() and sta_info_insert() above.
2083          */
2084
2085         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2086                            WLAN_STA_AUTHORIZED);
2087
2088         rates = 0;
2089         basic_rates = 0;
2090         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2091
2092         for (i = 0; i < elems.supp_rates_len; i++) {
2093                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2094
2095                 if (rate > 110)
2096                         have_higher_than_11mbit = true;
2097
2098                 for (j = 0; j < sband->n_bitrates; j++) {
2099                         if (sband->bitrates[j].bitrate == rate)
2100                                 rates |= BIT(j);
2101                         if (elems.supp_rates[i] & 0x80)
2102                                 basic_rates |= BIT(j);
2103                 }
2104         }
2105
2106         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2107                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2108
2109                 if (rate > 110)
2110                         have_higher_than_11mbit = true;
2111
2112                 for (j = 0; j < sband->n_bitrates; j++) {
2113                         if (sband->bitrates[j].bitrate == rate)
2114                                 rates |= BIT(j);
2115                         if (elems.ext_supp_rates[i] & 0x80)
2116                                 basic_rates |= BIT(j);
2117                 }
2118         }
2119
2120         sta->supp_rates[local->hw.conf.channel->band] = rates;
2121         sdata->basic_rates = basic_rates;
2122
2123         /* cf. IEEE 802.11 9.2.12 */
2124         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2125             have_higher_than_11mbit)
2126                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2127         else
2128                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2129
2130         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2131             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2132                 struct ieee80211_ht_bss_info bss_info;
2133                 ieee80211_ht_cap_ie_to_ht_info(
2134                                 (struct ieee80211_ht_cap *)
2135                                 elems.ht_cap_elem, &sta->ht_info);
2136                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2137                                 (struct ieee80211_ht_addt_info *)
2138                                 elems.ht_info_elem, &bss_info);
2139                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2140         }
2141
2142         rate_control_rate_init(sta, local);
2143
2144         if (elems.wmm_param) {
2145                 set_sta_flags(sta, WLAN_STA_WME);
2146                 rcu_read_unlock();
2147                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2148                                          elems.wmm_param_len);
2149         } else
2150                 rcu_read_unlock();
2151
2152         /* set AID and assoc capability,
2153          * ieee80211_set_associated() will tell the driver */
2154         bss_conf->aid = aid;
2155         bss_conf->assoc_capability = capab_info;
2156         ieee80211_set_associated(dev, ifsta, 1);
2157
2158         ieee80211_associated(dev, ifsta);
2159 }
2160
2161
2162 /* Caller must hold local->sta_bss_lock */
2163 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2164                                         struct ieee80211_sta_bss *bss)
2165 {
2166         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2167         u8 hash_idx;
2168
2169         if (bss_mesh_cfg(bss))
2170                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2171                                         bss_mesh_id_len(bss));
2172         else
2173                 hash_idx = STA_HASH(bss->bssid);
2174
2175         bss->hnext = local->sta_bss_hash[hash_idx];
2176         local->sta_bss_hash[hash_idx] = bss;
2177 }
2178
2179
2180 /* Caller must hold local->sta_bss_lock */
2181 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2182                                         struct ieee80211_sta_bss *bss)
2183 {
2184         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2185         struct ieee80211_sta_bss *b, *prev = NULL;
2186         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2187         while (b) {
2188                 if (b == bss) {
2189                         if (!prev)
2190                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2191                                         bss->hnext;
2192                         else
2193                                 prev->hnext = bss->hnext;
2194                         break;
2195                 }
2196                 prev = b;
2197                 b = b->hnext;
2198         }
2199 }
2200
2201
2202 static struct ieee80211_sta_bss *
2203 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2204                      u8 *ssid, u8 ssid_len)
2205 {
2206         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2207         struct ieee80211_sta_bss *bss;
2208
2209         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2210         if (!bss)
2211                 return NULL;
2212         atomic_inc(&bss->users);
2213         atomic_inc(&bss->users);
2214         memcpy(bss->bssid, bssid, ETH_ALEN);
2215         bss->freq = freq;
2216         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2217                 memcpy(bss->ssid, ssid, ssid_len);
2218                 bss->ssid_len = ssid_len;
2219         }
2220
2221         spin_lock_bh(&local->sta_bss_lock);
2222         /* TODO: order by RSSI? */
2223         list_add_tail(&bss->list, &local->sta_bss_list);
2224         __ieee80211_rx_bss_hash_add(dev, bss);
2225         spin_unlock_bh(&local->sta_bss_lock);
2226         return bss;
2227 }
2228
2229 static struct ieee80211_sta_bss *
2230 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2231                      u8 *ssid, u8 ssid_len)
2232 {
2233         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2234         struct ieee80211_sta_bss *bss;
2235
2236         spin_lock_bh(&local->sta_bss_lock);
2237         bss = local->sta_bss_hash[STA_HASH(bssid)];
2238         while (bss) {
2239                 if (!bss_mesh_cfg(bss) &&
2240                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2241                     bss->freq == freq &&
2242                     bss->ssid_len == ssid_len &&
2243                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2244                         atomic_inc(&bss->users);
2245                         break;
2246                 }
2247                 bss = bss->hnext;
2248         }
2249         spin_unlock_bh(&local->sta_bss_lock);
2250         return bss;
2251 }
2252
2253 #ifdef CONFIG_MAC80211_MESH
2254 static struct ieee80211_sta_bss *
2255 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2256                           u8 *mesh_cfg, int freq)
2257 {
2258         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2259         struct ieee80211_sta_bss *bss;
2260
2261         spin_lock_bh(&local->sta_bss_lock);
2262         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2263         while (bss) {
2264                 if (bss_mesh_cfg(bss) &&
2265                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2266                     bss->freq == freq &&
2267                     mesh_id_len == bss->mesh_id_len &&
2268                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2269                                                  mesh_id_len))) {
2270                         atomic_inc(&bss->users);
2271                         break;
2272                 }
2273                 bss = bss->hnext;
2274         }
2275         spin_unlock_bh(&local->sta_bss_lock);
2276         return bss;
2277 }
2278
2279 static struct ieee80211_sta_bss *
2280 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2281                           u8 *mesh_cfg, int mesh_config_len, int freq)
2282 {
2283         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2284         struct ieee80211_sta_bss *bss;
2285
2286         if (mesh_config_len != MESH_CFG_LEN)
2287                 return NULL;
2288
2289         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2290         if (!bss)
2291                 return NULL;
2292
2293         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2294         if (!bss->mesh_cfg) {
2295                 kfree(bss);
2296                 return NULL;
2297         }
2298
2299         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2300                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2301                 if (!bss->mesh_id) {
2302                         kfree(bss->mesh_cfg);
2303                         kfree(bss);
2304                         return NULL;
2305                 }
2306                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2307         }
2308
2309         atomic_inc(&bss->users);
2310         atomic_inc(&bss->users);
2311         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2312         bss->mesh_id_len = mesh_id_len;
2313         bss->freq = freq;
2314         spin_lock_bh(&local->sta_bss_lock);
2315         /* TODO: order by RSSI? */
2316         list_add_tail(&bss->list, &local->sta_bss_list);
2317         __ieee80211_rx_bss_hash_add(dev, bss);
2318         spin_unlock_bh(&local->sta_bss_lock);
2319         return bss;
2320 }
2321 #endif
2322
2323 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2324 {
2325         kfree(bss->wpa_ie);
2326         kfree(bss->rsn_ie);
2327         kfree(bss->wmm_ie);
2328         kfree(bss->ht_ie);
2329         kfree(bss->ht_add_ie);
2330         kfree(bss_mesh_id(bss));
2331         kfree(bss_mesh_cfg(bss));
2332         kfree(bss);
2333 }
2334
2335
2336 static void ieee80211_rx_bss_put(struct net_device *dev,
2337                                  struct ieee80211_sta_bss *bss)
2338 {
2339         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2340
2341         local_bh_disable();
2342         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2343                 local_bh_enable();
2344                 return;
2345         }
2346
2347         __ieee80211_rx_bss_hash_del(dev, bss);
2348         list_del(&bss->list);
2349         spin_unlock_bh(&local->sta_bss_lock);
2350         ieee80211_rx_bss_free(bss);
2351 }
2352
2353
2354 void ieee80211_rx_bss_list_init(struct net_device *dev)
2355 {
2356         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2357         spin_lock_init(&local->sta_bss_lock);
2358         INIT_LIST_HEAD(&local->sta_bss_list);
2359 }
2360
2361
2362 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2363 {
2364         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2365         struct ieee80211_sta_bss *bss, *tmp;
2366
2367         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2368                 ieee80211_rx_bss_put(dev, bss);
2369 }
2370
2371
2372 static int ieee80211_sta_join_ibss(struct net_device *dev,
2373                                    struct ieee80211_if_sta *ifsta,
2374                                    struct ieee80211_sta_bss *bss)
2375 {
2376         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2377         int res, rates, i, j;
2378         struct sk_buff *skb;
2379         struct ieee80211_mgmt *mgmt;
2380         struct ieee80211_tx_info *control;
2381         struct rate_selection ratesel;
2382         u8 *pos;
2383         struct ieee80211_sub_if_data *sdata;
2384         struct ieee80211_supported_band *sband;
2385         union iwreq_data wrqu;
2386
2387         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2388
2389         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2390
2391         /* Remove possible STA entries from other IBSS networks. */
2392         sta_info_flush_delayed(sdata);
2393
2394         if (local->ops->reset_tsf) {
2395                 /* Reset own TSF to allow time synchronization work. */
2396                 local->ops->reset_tsf(local_to_hw(local));
2397         }
2398         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2399         res = ieee80211_if_config(dev);
2400         if (res)
2401                 return res;
2402
2403         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2404
2405         sdata->drop_unencrypted = bss->capability &
2406                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2407
2408         res = ieee80211_set_freq(dev, bss->freq);
2409
2410         if (res)
2411                 return res;
2412
2413         /* Set beacon template */
2414         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2415         do {
2416                 if (!skb)
2417                         break;
2418
2419                 skb_reserve(skb, local->hw.extra_tx_headroom);
2420
2421                 mgmt = (struct ieee80211_mgmt *)
2422                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2423                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2424                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2425                                                    IEEE80211_STYPE_BEACON);
2426                 memset(mgmt->da, 0xff, ETH_ALEN);
2427                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2428                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2429                 mgmt->u.beacon.beacon_int =
2430                         cpu_to_le16(local->hw.conf.beacon_int);
2431                 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2432                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2433
2434                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2435                 *pos++ = WLAN_EID_SSID;
2436                 *pos++ = ifsta->ssid_len;
2437                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2438
2439                 rates = bss->supp_rates_len;
2440                 if (rates > 8)
2441                         rates = 8;
2442                 pos = skb_put(skb, 2 + rates);
2443                 *pos++ = WLAN_EID_SUPP_RATES;
2444                 *pos++ = rates;
2445                 memcpy(pos, bss->supp_rates, rates);
2446
2447                 if (bss->band == IEEE80211_BAND_2GHZ) {
2448                         pos = skb_put(skb, 2 + 1);
2449                         *pos++ = WLAN_EID_DS_PARAMS;
2450                         *pos++ = 1;
2451                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2452                 }
2453
2454                 pos = skb_put(skb, 2 + 2);
2455                 *pos++ = WLAN_EID_IBSS_PARAMS;
2456                 *pos++ = 2;
2457                 /* FIX: set ATIM window based on scan results */
2458                 *pos++ = 0;
2459                 *pos++ = 0;
2460
2461                 if (bss->supp_rates_len > 8) {
2462                         rates = bss->supp_rates_len - 8;
2463                         pos = skb_put(skb, 2 + rates);
2464                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2465                         *pos++ = rates;
2466                         memcpy(pos, &bss->supp_rates[8], rates);
2467                 }
2468
2469                 control = IEEE80211_SKB_CB(skb);
2470
2471                 rate_control_get_rate(dev, sband, skb, &ratesel);
2472                 if (ratesel.rate_idx < 0) {
2473                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2474                                "for IBSS beacon\n", dev->name);
2475                         break;
2476                 }
2477                 control->control.vif = &sdata->vif;
2478                 control->tx_rate_idx = ratesel.rate_idx;
2479                 if (sdata->bss_conf.use_short_preamble &&
2480                     sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2481                         control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2482                 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2483                 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2484                 control->control.retry_limit = 1;
2485
2486                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2487                 if (ifsta->probe_resp) {
2488                         mgmt = (struct ieee80211_mgmt *)
2489                                 ifsta->probe_resp->data;
2490                         mgmt->frame_control =
2491                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2492                                              IEEE80211_STYPE_PROBE_RESP);
2493                 } else {
2494                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2495                                "template for IBSS\n", dev->name);
2496                 }
2497
2498                 if (local->ops->beacon_update &&
2499                     local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2500                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2501                                "template\n", dev->name);
2502                         skb = NULL;
2503                 }
2504
2505                 rates = 0;
2506                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2507                 for (i = 0; i < bss->supp_rates_len; i++) {
2508                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2509                         for (j = 0; j < sband->n_bitrates; j++)
2510                                 if (sband->bitrates[j].bitrate == bitrate)
2511                                         rates |= BIT(j);
2512                 }
2513                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2514
2515                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2516         } while (0);
2517
2518         if (skb) {
2519                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2520                        "template\n", dev->name);
2521                 dev_kfree_skb(skb);
2522         }
2523
2524         ifsta->state = IEEE80211_IBSS_JOINED;
2525         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2526
2527         memset(&wrqu, 0, sizeof(wrqu));
2528         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2529         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2530
2531         return res;
2532 }
2533
2534 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2535                             struct ieee802_11_elems *elems,
2536                             enum ieee80211_band band)
2537 {
2538         struct ieee80211_supported_band *sband;
2539         struct ieee80211_rate *bitrates;
2540         size_t num_rates;
2541         u64 supp_rates;
2542         int i, j;
2543         sband = local->hw.wiphy->bands[band];
2544
2545         if (!sband) {
2546                 WARN_ON(1);
2547                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2548         }
2549
2550         bitrates = sband->bitrates;
2551         num_rates = sband->n_bitrates;
2552         supp_rates = 0;
2553         for (i = 0; i < elems->supp_rates_len +
2554                      elems->ext_supp_rates_len; i++) {
2555                 u8 rate = 0;
2556                 int own_rate;
2557                 if (i < elems->supp_rates_len)
2558                         rate = elems->supp_rates[i];
2559                 else if (elems->ext_supp_rates)
2560                         rate = elems->ext_supp_rates
2561                                 [i - elems->supp_rates_len];
2562                 own_rate = 5 * (rate & 0x7f);
2563                 for (j = 0; j < num_rates; j++)
2564                         if (bitrates[j].bitrate == own_rate)
2565                                 supp_rates |= BIT(j);
2566         }
2567         return supp_rates;
2568 }
2569
2570
2571 static void ieee80211_rx_bss_info(struct net_device *dev,
2572                                   struct ieee80211_mgmt *mgmt,
2573                                   size_t len,
2574                                   struct ieee80211_rx_status *rx_status,
2575                                   struct ieee802_11_elems *elems,
2576                                   int beacon)
2577 {
2578         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2579         int freq, clen;
2580         struct ieee80211_sta_bss *bss;
2581         struct sta_info *sta;
2582         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2583         u64 beacon_timestamp, rx_timestamp;
2584         struct ieee80211_channel *channel;
2585         DECLARE_MAC_BUF(mac);
2586         DECLARE_MAC_BUF(mac2);
2587
2588         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2589                 return; /* ignore ProbeResp to foreign address */
2590
2591         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2592
2593         if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2594             elems->mesh_config && mesh_matches_local(elems, dev)) {
2595                 u64 rates = ieee80211_sta_get_rates(local, elems,
2596                                                 rx_status->band);
2597
2598                 mesh_neighbour_update(mgmt->sa, rates, dev,
2599                                       mesh_peer_accepts_plinks(elems, dev));
2600         }
2601
2602         rcu_read_lock();
2603
2604         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2605             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2606             (sta = sta_info_get(local, mgmt->sa))) {
2607                 u64 prev_rates;
2608                 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2609                                                         rx_status->band);
2610
2611                 prev_rates = sta->supp_rates[rx_status->band];
2612                 sta->supp_rates[rx_status->band] &= supp_rates;
2613                 if (sta->supp_rates[rx_status->band] == 0) {
2614                         /* No matching rates - this should not really happen.
2615                          * Make sure that at least one rate is marked
2616                          * supported to avoid issues with TX rate ctrl. */
2617                         sta->supp_rates[rx_status->band] =
2618                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2619                 }
2620         }
2621
2622         rcu_read_unlock();
2623
2624         if (elems->ds_params && elems->ds_params_len == 1)
2625                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2626         else
2627                 freq = rx_status->freq;
2628
2629         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2630
2631         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2632                 return;
2633
2634 #ifdef CONFIG_MAC80211_MESH
2635         if (elems->mesh_config)
2636                 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2637                                 elems->mesh_id_len, elems->mesh_config, freq);
2638         else
2639 #endif
2640                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2641                                            elems->ssid, elems->ssid_len);
2642         if (!bss) {
2643 #ifdef CONFIG_MAC80211_MESH
2644                 if (elems->mesh_config)
2645                         bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2646                                 elems->mesh_id_len, elems->mesh_config,
2647                                 elems->mesh_config_len, freq);
2648                 else
2649 #endif
2650                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2651                                                   elems->ssid, elems->ssid_len);
2652                 if (!bss)
2653                         return;
2654         } else {
2655 #if 0
2656                 /* TODO: order by RSSI? */
2657                 spin_lock_bh(&local->sta_bss_lock);
2658                 list_move_tail(&bss->list, &local->sta_bss_list);
2659                 spin_unlock_bh(&local->sta_bss_lock);
2660 #endif
2661         }
2662
2663         /* save the ERP value so that it is available at association time */
2664         if (elems->erp_info && elems->erp_info_len >= 1) {
2665                 bss->erp_value = elems->erp_info[0];
2666                 bss->has_erp_value = 1;
2667         }
2668
2669         if (elems->ht_cap_elem &&
2670              (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2671              memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2672                 kfree(bss->ht_ie);
2673                 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2674                 if (bss->ht_ie) {
2675                         memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2676                                 elems->ht_cap_elem_len + 2);
2677                         bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2678                 } else
2679                         bss->ht_ie_len = 0;
2680         } else if (!elems->ht_cap_elem && bss->ht_ie) {
2681                 kfree(bss->ht_ie);
2682                 bss->ht_ie = NULL;
2683                 bss->ht_ie_len = 0;
2684         }
2685
2686         if (elems->ht_info_elem &&
2687              (!bss->ht_add_ie ||
2688              bss->ht_add_ie_len != elems->ht_info_elem_len ||
2689              memcmp(bss->ht_add_ie, elems->ht_info_elem,
2690                         elems->ht_info_elem_len))) {
2691                 kfree(bss->ht_add_ie);
2692                 bss->ht_add_ie =
2693                         kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2694                 if (bss->ht_add_ie) {
2695                         memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2696                                 elems->ht_info_elem_len + 2);
2697                         bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2698                 } else
2699                         bss->ht_add_ie_len = 0;
2700         } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2701                 kfree(bss->ht_add_ie);
2702                 bss->ht_add_ie = NULL;
2703                 bss->ht_add_ie_len = 0;
2704         }
2705
2706         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2707         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2708
2709         bss->supp_rates_len = 0;
2710         if (elems->supp_rates) {
2711                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2712                 if (clen > elems->supp_rates_len)
2713                         clen = elems->supp_rates_len;
2714                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2715                        clen);
2716                 bss->supp_rates_len += clen;
2717         }
2718         if (elems->ext_supp_rates) {
2719                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2720                 if (clen > elems->ext_supp_rates_len)
2721                         clen = elems->ext_supp_rates_len;
2722                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2723                        elems->ext_supp_rates, clen);
2724                 bss->supp_rates_len += clen;
2725         }
2726
2727         bss->band = rx_status->band;
2728
2729         bss->timestamp = beacon_timestamp;
2730         bss->last_update = jiffies;
2731         bss->signal = rx_status->signal;
2732         bss->noise = rx_status->noise;
2733         bss->qual = rx_status->qual;
2734         if (!beacon && !bss->probe_resp)
2735                 bss->probe_resp = true;
2736
2737         /*
2738          * In STA mode, the remaining parameters should not be overridden
2739          * by beacons because they're not necessarily accurate there.
2740          */
2741         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2742             bss->probe_resp && beacon) {
2743                 ieee80211_rx_bss_put(dev, bss);
2744                 return;
2745         }
2746
2747         if (elems->wpa &&
2748             (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2749              memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2750                 kfree(bss->wpa_ie);
2751                 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2752                 if (bss->wpa_ie) {
2753                         memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2754                         bss->wpa_ie_len = elems->wpa_len + 2;
2755                 } else
2756                         bss->wpa_ie_len = 0;
2757         } else if (!elems->wpa && bss->wpa_ie) {
2758                 kfree(bss->wpa_ie);
2759                 bss->wpa_ie = NULL;
2760                 bss->wpa_ie_len = 0;
2761         }
2762
2763         if (elems->rsn &&
2764             (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2765              memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2766                 kfree(bss->rsn_ie);
2767                 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2768                 if (bss->rsn_ie) {
2769                         memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2770                         bss->rsn_ie_len = elems->rsn_len + 2;
2771                 } else
2772                         bss->rsn_ie_len = 0;
2773         } else if (!elems->rsn && bss->rsn_ie) {
2774                 kfree(bss->rsn_ie);
2775                 bss->rsn_ie = NULL;
2776                 bss->rsn_ie_len = 0;
2777         }
2778
2779         /*
2780          * Cf.
2781          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2782          *
2783          * quoting:
2784          *
2785          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2786          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2787          * Alliance (September 1, 2004) is incorporated by reference herein.
2788          * The inclusion of the WMM Parameters in probe responses and
2789          * association responses is mandatory for WMM enabled networks. The
2790          * inclusion of the WMM Parameters in beacons, however, is optional.
2791          */
2792
2793         if (elems->wmm_param &&
2794             (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2795              memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2796                 kfree(bss->wmm_ie);
2797                 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2798                 if (bss->wmm_ie) {
2799                         memcpy(bss->wmm_ie, elems->wmm_param - 2,
2800                                elems->wmm_param_len + 2);
2801                         bss->wmm_ie_len = elems->wmm_param_len + 2;
2802                 } else
2803                         bss->wmm_ie_len = 0;
2804         } else if (elems->wmm_info &&
2805                     (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2806                      memcmp(bss->wmm_ie, elems->wmm_info,
2807                                                 elems->wmm_info_len))) {
2808                  /* As for certain AP's Fifth bit is not set in WMM IE in
2809                   * beacon frames.So while parsing the beacon frame the
2810                   * wmm_info structure is used instead of wmm_param.
2811                   * wmm_info structure was never used to set bss->wmm_ie.
2812                   * This code fixes this problem by copying the WME
2813                   * information from wmm_info to bss->wmm_ie and enabling
2814                   * n-band association.
2815                   */
2816                 kfree(bss->wmm_ie);
2817                 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2818                 if (bss->wmm_ie) {
2819                         memcpy(bss->wmm_ie, elems->wmm_info - 2,
2820                                elems->wmm_info_len + 2);
2821                         bss->wmm_ie_len = elems->wmm_info_len + 2;
2822                 } else
2823                         bss->wmm_ie_len = 0;
2824         } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2825                 kfree(bss->wmm_ie);
2826                 bss->wmm_ie = NULL;
2827                 bss->wmm_ie_len = 0;
2828         }
2829
2830         /* check if we need to merge IBSS */
2831         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2832             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2833             bss->capability & WLAN_CAPABILITY_IBSS &&
2834             bss->freq == local->oper_channel->center_freq &&
2835             elems->ssid_len == sdata->u.sta.ssid_len &&
2836             memcmp(elems->ssid, sdata->u.sta.ssid,
2837                                 sdata->u.sta.ssid_len) == 0) {
2838                 if (rx_status->flag & RX_FLAG_TSFT) {
2839                         /* in order for correct IBSS merging we need mactime
2840                          *
2841                          * since mactime is defined as the time the first data
2842                          * symbol of the frame hits the PHY, and the timestamp
2843                          * of the beacon is defined as "the time that the data
2844                          * symbol containing the first bit of the timestamp is
2845                          * transmitted to the PHY plus the transmitting STA’s
2846                          * delays through its local PHY from the MAC-PHY
2847                          * interface to its interface with the WM"
2848                          * (802.11 11.1.2) - equals the time this bit arrives at
2849                          * the receiver - we have to take into account the
2850                          * offset between the two.
2851                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2852                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2853                          */
2854                         int rate = local->hw.wiphy->bands[rx_status->band]->
2855                                         bitrates[rx_status->rate_idx].bitrate;
2856                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2857                 } else if (local && local->ops && local->ops->get_tsf)
2858                         /* second best option: get current TSF */
2859                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2860                 else
2861                         /* can't merge without knowing the TSF */
2862                         rx_timestamp = -1LLU;
2863 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2864                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2865                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2866                        print_mac(mac, mgmt->sa),
2867                        print_mac(mac2, mgmt->bssid),
2868                        (unsigned long long)rx_timestamp,
2869                        (unsigned long long)beacon_timestamp,
2870                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2871                        jiffies);
2872 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2873                 if (beacon_timestamp > rx_timestamp) {
2874 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2875                         printk(KERN_DEBUG "%s: beacon TSF higher than "
2876                                "local TSF - IBSS merge with BSSID %s\n",
2877                                dev->name, print_mac(mac, mgmt->bssid));
2878 #endif
2879                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2880                         ieee80211_ibss_add_sta(dev, NULL,
2881                                                mgmt->bssid, mgmt->sa,
2882                                                BIT(rx_status->rate_idx));
2883                 }
2884         }
2885
2886         ieee80211_rx_bss_put(dev, bss);
2887 }
2888
2889
2890 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2891                                          struct ieee80211_mgmt *mgmt,
2892                                          size_t len,
2893                                          struct ieee80211_rx_status *rx_status)
2894 {
2895         size_t baselen;
2896         struct ieee802_11_elems elems;
2897
2898         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2899         if (baselen > len)
2900                 return;
2901
2902         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2903                                 &elems);
2904
2905         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
2906 }
2907
2908
2909 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2910                                      struct ieee80211_mgmt *mgmt,
2911                                      size_t len,
2912                                      struct ieee80211_rx_status *rx_status)
2913 {
2914         struct ieee80211_sub_if_data *sdata;
2915         struct ieee80211_if_sta *ifsta;
2916         size_t baselen;
2917         struct ieee802_11_elems elems;
2918         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2919         struct ieee80211_conf *conf = &local->hw.conf;
2920         u32 changed = 0;
2921
2922         /* Process beacon from the current BSS */
2923         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2924         if (baselen > len)
2925                 return;
2926
2927         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2928
2929         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
2930
2931         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2932         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2933                 return;
2934         ifsta = &sdata->u.sta;
2935
2936         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2937             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2938                 return;
2939
2940         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2941                                  elems.wmm_param_len);
2942
2943         /* Do not send changes to driver if we are scanning. This removes
2944          * requirement that driver's bss_info_changed function needs to be
2945          * atomic. */
2946         if (local->sta_sw_scanning || local->sta_hw_scanning)
2947                 return;
2948
2949         if (elems.erp_info && elems.erp_info_len >= 1)
2950                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2951         else {
2952                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2953                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2954                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2955         }
2956
2957         if (elems.ht_cap_elem && elems.ht_info_elem &&
2958             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2959                 struct ieee80211_ht_bss_info bss_info;
2960
2961                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2962                                 (struct ieee80211_ht_addt_info *)
2963                                 elems.ht_info_elem, &bss_info);
2964                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2965                                                &bss_info);
2966         }
2967
2968         ieee80211_bss_info_change_notify(sdata, changed);
2969 }
2970
2971
2972 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2973                                         struct ieee80211_if_sta *ifsta,
2974                                         struct ieee80211_mgmt *mgmt,
2975                                         size_t len,
2976                                         struct ieee80211_rx_status *rx_status)
2977 {
2978         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2979         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2980         int tx_last_beacon;
2981         struct sk_buff *skb;
2982         struct ieee80211_mgmt *resp;
2983         u8 *pos, *end;
2984         DECLARE_MAC_BUF(mac);
2985 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2986         DECLARE_MAC_BUF(mac2);
2987         DECLARE_MAC_BUF(mac3);
2988 #endif
2989
2990         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2991             ifsta->state != IEEE80211_IBSS_JOINED ||
2992             len < 24 + 2 || !ifsta->probe_resp)
2993                 return;
2994
2995         if (local->ops->tx_last_beacon)
2996                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2997         else
2998                 tx_last_beacon = 1;
2999
3000 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3001         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
3002                "%s (tx_last_beacon=%d)\n",
3003                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3004                print_mac(mac3, mgmt->bssid), tx_last_beacon);
3005 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3006
3007         if (!tx_last_beacon)
3008                 return;
3009
3010         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3011             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3012                 return;
3013
3014         end = ((u8 *) mgmt) + len;
3015         pos = mgmt->u.probe_req.variable;
3016         if (pos[0] != WLAN_EID_SSID ||
3017             pos + 2 + pos[1] > end) {
3018 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3019                 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3020                        "from %s\n",
3021                        dev->name, print_mac(mac, mgmt->sa));
3022 #endif
3023                 return;
3024         }
3025         if (pos[1] != 0 &&
3026             (pos[1] != ifsta->ssid_len ||
3027              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3028                 /* Ignore ProbeReq for foreign SSID */
3029                 return;
3030         }
3031
3032         /* Reply with ProbeResp */
3033         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3034         if (!skb)
3035                 return;
3036
3037         resp = (struct ieee80211_mgmt *) skb->data;
3038         memcpy(resp->da, mgmt->sa, ETH_ALEN);
3039 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3040         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3041                dev->name, print_mac(mac, resp->da));
3042 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3043         ieee80211_sta_tx(dev, skb, 0);
3044 }
3045
3046 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3047                                      struct ieee80211_if_sta *ifsta,
3048                                      struct ieee80211_mgmt *mgmt,
3049                                      size_t len,
3050                                      struct ieee80211_rx_status *rx_status)
3051 {
3052         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3053         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3054
3055         if (len < IEEE80211_MIN_ACTION_SIZE)
3056                 return;
3057
3058         switch (mgmt->u.action.category) {
3059         case WLAN_CATEGORY_SPECTRUM_MGMT:
3060                 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3061                         break;
3062                 switch (mgmt->u.action.u.chan_switch.action_code) {
3063                 case WLAN_ACTION_SPCT_MSR_REQ:
3064                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3065                                    sizeof(mgmt->u.action.u.measurement)))
3066                                 break;
3067                         ieee80211_sta_process_measurement_req(dev, mgmt, len);
3068                         break;
3069                 }
3070                 break;
3071         case WLAN_CATEGORY_BACK:
3072                 switch (mgmt->u.action.u.addba_req.action_code) {
3073                 case WLAN_ACTION_ADDBA_REQ:
3074                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3075                                    sizeof(mgmt->u.action.u.addba_req)))
3076                                 break;
3077                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3078                         break;
3079                 case WLAN_ACTION_ADDBA_RESP:
3080                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3081                                    sizeof(mgmt->u.action.u.addba_resp)))
3082                                 break;
3083                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3084                         break;
3085                 case WLAN_ACTION_DELBA:
3086                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3087                                    sizeof(mgmt->u.action.u.delba)))
3088                                 break;
3089                         ieee80211_sta_process_delba(dev, mgmt, len);
3090                         break;
3091                 }
3092                 break;
3093         case PLINK_CATEGORY:
3094                 if (ieee80211_vif_is_mesh(&sdata->vif))
3095                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3096                 break;
3097         case MESH_PATH_SEL_CATEGORY:
3098                 if (ieee80211_vif_is_mesh(&sdata->vif))
3099                         mesh_rx_path_sel_frame(dev, mgmt, len);
3100                 break;
3101         }
3102 }
3103
3104 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3105                            struct ieee80211_rx_status *rx_status)
3106 {
3107         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3108         struct ieee80211_sub_if_data *sdata;
3109         struct ieee80211_if_sta *ifsta;
3110         struct ieee80211_mgmt *mgmt;
3111         u16 fc;
3112
3113         if (skb->len < 24)
3114                 goto fail;
3115
3116         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3117         ifsta = &sdata->u.sta;
3118
3119         mgmt = (struct ieee80211_mgmt *) skb->data;
3120         fc = le16_to_cpu(mgmt->frame_control);
3121
3122         switch (fc & IEEE80211_FCTL_STYPE) {
3123         case IEEE80211_STYPE_PROBE_REQ:
3124         case IEEE80211_STYPE_PROBE_RESP:
3125         case IEEE80211_STYPE_BEACON:
3126         case IEEE80211_STYPE_ACTION:
3127                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3128         case IEEE80211_STYPE_AUTH:
3129         case IEEE80211_STYPE_ASSOC_RESP:
3130         case IEEE80211_STYPE_REASSOC_RESP:
3131         case IEEE80211_STYPE_DEAUTH:
3132         case IEEE80211_STYPE_DISASSOC:
3133                 skb_queue_tail(&ifsta->skb_queue, skb);
3134                 queue_work(local->hw.workqueue, &ifsta->work);
3135                 return;
3136         }
3137
3138  fail:
3139         kfree_skb(skb);
3140 }
3141
3142
3143 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3144                                          struct sk_buff *skb)
3145 {
3146         struct ieee80211_rx_status *rx_status;
3147         struct ieee80211_sub_if_data *sdata;
3148         struct ieee80211_if_sta *ifsta;
3149         struct ieee80211_mgmt *mgmt;
3150         u16 fc;
3151
3152         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3153         ifsta = &sdata->u.sta;
3154
3155         rx_status = (struct ieee80211_rx_status *) skb->cb;
3156         mgmt = (struct ieee80211_mgmt *) skb->data;
3157         fc = le16_to_cpu(mgmt->frame_control);
3158
3159         switch (fc & IEEE80211_FCTL_STYPE) {
3160         case IEEE80211_STYPE_PROBE_REQ:
3161                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3162                                             rx_status);
3163                 break;
3164         case IEEE80211_STYPE_PROBE_RESP:
3165                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3166                 break;
3167         case IEEE80211_STYPE_BEACON:
3168                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3169                 break;
3170         case IEEE80211_STYPE_AUTH:
3171                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3172                 break;
3173         case IEEE80211_STYPE_ASSOC_RESP:
3174                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3175                 break;
3176         case IEEE80211_STYPE_REASSOC_RESP:
3177                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3178                 break;
3179         case IEEE80211_STYPE_DEAUTH:
3180                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3181                 break;
3182         case IEEE80211_STYPE_DISASSOC:
3183                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3184                 break;
3185         case IEEE80211_STYPE_ACTION:
3186                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3187                 break;
3188         }
3189
3190         kfree_skb(skb);
3191 }
3192
3193
3194 ieee80211_rx_result
3195 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3196                       struct ieee80211_rx_status *rx_status)
3197 {
3198         struct ieee80211_mgmt *mgmt;
3199         __le16 fc;
3200
3201         if (skb->len < 2)
3202                 return RX_DROP_UNUSABLE;
3203
3204         mgmt = (struct ieee80211_mgmt *) skb->data;
3205         fc = mgmt->frame_control;
3206
3207         if (ieee80211_is_ctl(fc))
3208                 return RX_CONTINUE;
3209
3210         if (skb->len < 24)
3211                 return RX_DROP_MONITOR;
3212
3213         if (ieee80211_is_probe_resp(fc)) {
3214                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3215                 dev_kfree_skb(skb);
3216                 return RX_QUEUED;
3217         }
3218
3219         if (ieee80211_is_beacon(fc)) {
3220                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3221                 dev_kfree_skb(skb);
3222                 return RX_QUEUED;
3223         }
3224
3225         return RX_CONTINUE;
3226 }
3227
3228
3229 static int ieee80211_sta_active_ibss(struct net_device *dev)
3230 {
3231         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3232         int active = 0;
3233         struct sta_info *sta;
3234         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3235
3236         rcu_read_lock();
3237
3238         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3239                 if (sta->sdata == sdata &&
3240                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3241                                jiffies)) {
3242                         active++;
3243                         break;
3244                 }
3245         }
3246
3247         rcu_read_unlock();
3248
3249         return active;
3250 }
3251
3252
3253 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3254 {
3255         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3256         struct sta_info *sta, *tmp;
3257         LIST_HEAD(tmp_list);
3258         DECLARE_MAC_BUF(mac);
3259         unsigned long flags;
3260
3261         spin_lock_irqsave(&local->sta_lock, flags);
3262         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3263                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3264 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3265                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3266                                dev->name, print_mac(mac, sta->addr));
3267 #endif
3268                         __sta_info_unlink(&sta);
3269                         if (sta)
3270                                 list_add(&sta->list, &tmp_list);
3271                 }
3272         spin_unlock_irqrestore(&local->sta_lock, flags);
3273
3274         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3275                 sta_info_destroy(sta);
3276 }
3277
3278
3279 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3280                                      struct ieee80211_if_sta *ifsta)
3281 {
3282         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3283
3284         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3285         if (ieee80211_sta_active_ibss(dev))
3286                 return;
3287
3288         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3289                "IBSS networks with same SSID (merge)\n", dev->name);
3290         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3291 }
3292
3293
3294 #ifdef CONFIG_MAC80211_MESH
3295 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3296                            struct ieee80211_if_sta *ifsta)
3297 {
3298         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3299         bool free_plinks;
3300
3301         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3302         mesh_path_expire(dev);
3303
3304         free_plinks = mesh_plink_availables(sdata);
3305         if (free_plinks != sdata->u.sta.accepting_plinks)
3306                 ieee80211_if_config_beacon(dev);
3307
3308         mod_timer(&ifsta->timer, jiffies +
3309                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3310 }
3311
3312
3313 void ieee80211_start_mesh(struct net_device *dev)
3314 {
3315         struct ieee80211_if_sta *ifsta;
3316         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3317         ifsta = &sdata->u.sta;
3318         ifsta->state = IEEE80211_MESH_UP;
3319         ieee80211_sta_timer((unsigned long)sdata);
3320 }
3321 #endif
3322
3323
3324 void ieee80211_sta_timer(unsigned long data)
3325 {
3326         struct ieee80211_sub_if_data *sdata =
3327                 (struct ieee80211_sub_if_data *) data;
3328         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3329         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3330
3331         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3332         queue_work(local->hw.workqueue, &ifsta->work);
3333 }
3334
3335 void ieee80211_sta_work(struct work_struct *work)
3336 {
3337         struct ieee80211_sub_if_data *sdata =
3338                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3339         struct net_device *dev = sdata->dev;
3340         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3341         struct ieee80211_if_sta *ifsta;
3342         struct sk_buff *skb;
3343
3344         if (!netif_running(dev))
3345                 return;
3346
3347         if (local->sta_sw_scanning || local->sta_hw_scanning)
3348                 return;
3349
3350         if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3351                     sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3352                     sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3353                 return;
3354         ifsta = &sdata->u.sta;
3355
3356         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3357                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3358
3359 #ifdef CONFIG_MAC80211_MESH
3360         if (ifsta->preq_queue_len &&
3361             time_after(jiffies,
3362                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3363                 mesh_path_start_discovery(dev);
3364 #endif
3365
3366         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3367             ifsta->state != IEEE80211_ASSOCIATE &&
3368             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3369                 if (ifsta->scan_ssid_len)
3370                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3371                 else
3372                         ieee80211_sta_start_scan(dev, NULL, 0);
3373                 return;
3374         }
3375
3376         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3377                 if (ieee80211_sta_config_auth(dev, ifsta))
3378                         return;
3379                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3380         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3381                 return;
3382
3383         switch (ifsta->state) {
3384         case IEEE80211_DISABLED:
3385                 break;
3386         case IEEE80211_AUTHENTICATE:
3387                 ieee80211_authenticate(dev, ifsta);
3388                 break;
3389         case IEEE80211_ASSOCIATE:
3390                 ieee80211_associate(dev, ifsta);
3391                 break;
3392         case IEEE80211_ASSOCIATED:
3393                 ieee80211_associated(dev, ifsta);
3394                 break;
3395         case IEEE80211_IBSS_SEARCH:
3396                 ieee80211_sta_find_ibss(dev, ifsta);
3397                 break;
3398         case IEEE80211_IBSS_JOINED:
3399                 ieee80211_sta_merge_ibss(dev, ifsta);
3400                 break;
3401 #ifdef CONFIG_MAC80211_MESH
3402         case IEEE80211_MESH_UP:
3403                 ieee80211_mesh_housekeeping(dev, ifsta);
3404                 break;
3405 #endif
3406         default:
3407                 WARN_ON(1);
3408                 break;
3409         }
3410
3411         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3412                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3413                        "mixed-cell disabled - disassociate\n", dev->name);
3414
3415                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3416                 ieee80211_set_disassoc(dev, ifsta, 0);
3417         }
3418 }
3419
3420
3421 static void ieee80211_sta_reset_auth(struct net_device *dev,
3422                                      struct ieee80211_if_sta *ifsta)
3423 {
3424         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3425
3426         if (local->ops->reset_tsf) {
3427                 /* Reset own TSF to allow time synchronization work. */
3428                 local->ops->reset_tsf(local_to_hw(local));
3429         }
3430
3431         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3432
3433
3434         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3435                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3436         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3437                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3438         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3439                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3440         else
3441                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3442         ifsta->auth_transaction = -1;
3443         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3444         ifsta->auth_tries = ifsta->assoc_tries = 0;
3445         netif_carrier_off(dev);
3446 }
3447
3448
3449 void ieee80211_sta_req_auth(struct net_device *dev,
3450                             struct ieee80211_if_sta *ifsta)
3451 {
3452         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3453         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3454
3455         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3456                 return;
3457
3458         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3459                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3460             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3461                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3462                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3463                 queue_work(local->hw.workqueue, &ifsta->work);
3464         }
3465 }
3466
3467 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3468                                     const char *ssid, int ssid_len)
3469 {
3470         int tmp, hidden_ssid;
3471
3472         if (ssid_len == ifsta->ssid_len &&
3473             !memcmp(ifsta->ssid, ssid, ssid_len))
3474                 return 1;
3475
3476         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3477                 return 0;
3478
3479         hidden_ssid = 1;
3480         tmp = ssid_len;
3481         while (tmp--) {
3482                 if (ssid[tmp] != '\0') {
3483                         hidden_ssid = 0;
3484                         break;
3485                 }
3486         }
3487
3488         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3489                 return 1;
3490
3491         if (ssid_len == 1 && ssid[0] == ' ')
3492                 return 1;
3493
3494         return 0;
3495 }
3496
3497 static int ieee80211_sta_config_auth(struct net_device *dev,
3498                                      struct ieee80211_if_sta *ifsta)
3499 {
3500         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3501         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3502         struct ieee80211_sta_bss *bss, *selected = NULL;
3503         int top_rssi = 0, freq;
3504
3505         spin_lock_bh(&local->sta_bss_lock);
3506         freq = local->oper_channel->center_freq;
3507         list_for_each_entry(bss, &local->sta_bss_list, list) {
3508                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3509                         continue;
3510
3511                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3512                         IEEE80211_STA_AUTO_BSSID_SEL |
3513                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3514                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3515                      !!sdata->default_key))
3516                         continue;
3517
3518                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3519                     bss->freq != freq)
3520                         continue;
3521
3522                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3523                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3524                         continue;
3525
3526                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3527                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3528                         continue;
3529
3530                 if (!selected || top_rssi < bss->signal) {
3531                         selected = bss;
3532                         top_rssi = bss->signal;
3533                 }
3534         }
3535         if (selected)
3536                 atomic_inc(&selected->users);
3537         spin_unlock_bh(&local->sta_bss_lock);
3538
3539         if (selected) {
3540                 ieee80211_set_freq(dev, selected->freq);
3541                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3542                         ieee80211_sta_set_ssid(dev, selected->ssid,
3543                                                selected->ssid_len);
3544                 ieee80211_sta_set_bssid(dev, selected->bssid);
3545                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3546                 ieee80211_rx_bss_put(dev, selected);
3547                 ifsta->state = IEEE80211_AUTHENTICATE;
3548                 ieee80211_sta_reset_auth(dev, ifsta);
3549                 return 0;
3550         } else {
3551                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3552                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3553                                 ieee80211_sta_start_scan(dev, NULL, 0);
3554                         else
3555                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3556                                                          ifsta->ssid_len);
3557                         ifsta->state = IEEE80211_AUTHENTICATE;
3558                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3559                 } else
3560                         ifsta->state = IEEE80211_DISABLED;
3561         }
3562         return -1;
3563 }
3564
3565
3566 static int ieee80211_sta_create_ibss(struct net_device *dev,
3567                                      struct ieee80211_if_sta *ifsta)
3568 {
3569         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3570         struct ieee80211_sta_bss *bss;
3571         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3572         struct ieee80211_supported_band *sband;
3573         u8 bssid[ETH_ALEN], *pos;
3574         int i;
3575         int ret;
3576         DECLARE_MAC_BUF(mac);
3577
3578 #if 0
3579         /* Easier testing, use fixed BSSID. */
3580         memset(bssid, 0xfe, ETH_ALEN);
3581 #else
3582         /* Generate random, not broadcast, locally administered BSSID. Mix in
3583          * own MAC address to make sure that devices that do not have proper
3584          * random number generator get different BSSID. */
3585         get_random_bytes(bssid, ETH_ALEN);
3586         for (i = 0; i < ETH_ALEN; i++)
3587                 bssid[i] ^= dev->dev_addr[i];
3588         bssid[0] &= ~0x01;
3589         bssid[0] |= 0x02;
3590 #endif
3591
3592         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3593                dev->name, print_mac(mac, bssid));
3594
3595         bss = ieee80211_rx_bss_add(dev, bssid,
3596                                    local->hw.conf.channel->center_freq,
3597                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3598         if (!bss)
3599                 return -ENOMEM;
3600
3601         bss->band = local->hw.conf.channel->band;
3602         sband = local->hw.wiphy->bands[bss->band];
3603
3604         if (local->hw.conf.beacon_int == 0)
3605                 local->hw.conf.beacon_int = 100;
3606         bss->beacon_int = local->hw.conf.beacon_int;
3607         bss->last_update = jiffies;
3608         bss->capability = WLAN_CAPABILITY_IBSS;
3609
3610         if (sdata->default_key)
3611                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3612         else
3613                 sdata->drop_unencrypted = 0;
3614
3615         bss->supp_rates_len = sband->n_bitrates;
3616         pos = bss->supp_rates;
3617         for (i = 0; i < sband->n_bitrates; i++) {
3618                 int rate = sband->bitrates[i].bitrate;
3619                 *pos++ = (u8) (rate / 5);
3620         }
3621
3622         ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3623         ieee80211_rx_bss_put(dev, bss);
3624         return ret;
3625 }
3626
3627
3628 static int ieee80211_sta_find_ibss(struct net_device *dev,
3629                                    struct ieee80211_if_sta *ifsta)
3630 {
3631         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3632         struct ieee80211_sta_bss *bss;
3633         int found = 0;
3634         u8 bssid[ETH_ALEN];
3635         int active_ibss;
3636         DECLARE_MAC_BUF(mac);
3637         DECLARE_MAC_BUF(mac2);
3638
3639         if (ifsta->ssid_len == 0)
3640                 return -EINVAL;
3641
3642         active_ibss = ieee80211_sta_active_ibss(dev);
3643 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3644         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3645                dev->name, active_ibss);
3646 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3647         spin_lock_bh(&local->sta_bss_lock);
3648         list_for_each_entry(bss, &local->sta_bss_list, list) {
3649                 if (ifsta->ssid_len != bss->ssid_len ||
3650                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3651                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3652                         continue;
3653 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3654                 printk(KERN_DEBUG "   bssid=%s found\n",
3655                        print_mac(mac, bss->bssid));
3656 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3657                 memcpy(bssid, bss->bssid, ETH_ALEN);
3658                 found = 1;
3659                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3660                         break;
3661         }
3662         spin_unlock_bh(&local->sta_bss_lock);
3663
3664 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3665         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3666                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3667 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3668         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3669             (bss = ieee80211_rx_bss_get(dev, bssid,
3670                                         local->hw.conf.channel->center_freq,
3671                                         ifsta->ssid, ifsta->ssid_len))) {
3672                 int ret;
3673                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3674                        " based on configured SSID\n",
3675                        dev->name, print_mac(mac, bssid));
3676                 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3677                 ieee80211_rx_bss_put(dev, bss);
3678                 return ret;
3679         }
3680 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3681         printk(KERN_DEBUG "   did not try to join ibss\n");
3682 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3683
3684         /* Selected IBSS not found in current scan results - try to scan */
3685         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3686             !ieee80211_sta_active_ibss(dev)) {
3687                 mod_timer(&ifsta->timer, jiffies +
3688                                       IEEE80211_IBSS_MERGE_INTERVAL);
3689         } else if (time_after(jiffies, local->last_scan_completed +
3690                               IEEE80211_SCAN_INTERVAL)) {
3691                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3692                        "join\n", dev->name);
3693                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3694                                               ifsta->ssid_len);
3695         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3696                 int interval = IEEE80211_SCAN_INTERVAL;
3697
3698                 if (time_after(jiffies, ifsta->ibss_join_req +
3699                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3700                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3701                             (!(local->oper_channel->flags &
3702                                         IEEE80211_CHAN_NO_IBSS)))
3703                                 return ieee80211_sta_create_ibss(dev, ifsta);
3704                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3705                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3706                                        " %d MHz\n", dev->name,
3707                                        local->hw.conf.channel->center_freq);
3708                         }
3709
3710                         /* No IBSS found - decrease scan interval and continue
3711                          * scanning. */
3712                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3713                 }
3714
3715                 ifsta->state = IEEE80211_IBSS_SEARCH;
3716                 mod_timer(&ifsta->timer, jiffies + interval);
3717                 return 0;
3718         }
3719
3720         return 0;
3721 }
3722
3723
3724 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3725 {
3726         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3727         struct ieee80211_if_sta *ifsta;
3728
3729         if (len > IEEE80211_MAX_SSID_LEN)
3730                 return -EINVAL;
3731
3732         ifsta = &sdata->u.sta;
3733
3734         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3735                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3736         memcpy(ifsta->ssid, ssid, len);
3737         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3738         ifsta->ssid_len = len;
3739
3740         if (len)
3741                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3742         else
3743                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3744         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3745             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3746                 ifsta->ibss_join_req = jiffies;
3747                 ifsta->state = IEEE80211_IBSS_SEARCH;
3748                 return ieee80211_sta_find_ibss(dev, ifsta);
3749         }
3750         return 0;
3751 }
3752
3753
3754 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3755 {
3756         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3757         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3758         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3759         *len = ifsta->ssid_len;
3760         return 0;
3761 }
3762
3763
3764 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3765 {
3766         struct ieee80211_sub_if_data *sdata;
3767         struct ieee80211_if_sta *ifsta;
3768         int res;
3769
3770         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3771         ifsta = &sdata->u.sta;
3772
3773         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3774                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3775                 res = ieee80211_if_config(dev);
3776                 if (res) {
3777                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3778                                "the low-level driver\n", dev->name);
3779                         return res;
3780                 }
3781         }
3782
3783         if (is_valid_ether_addr(bssid))
3784                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3785         else
3786                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3787
3788         return 0;
3789 }
3790
3791
3792 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3793                                     struct ieee80211_sub_if_data *sdata,
3794                                     int powersave)
3795 {
3796         struct sk_buff *skb;
3797         struct ieee80211_hdr *nullfunc;
3798         __le16 fc;
3799
3800         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3801         if (!skb) {
3802                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3803                        "frame\n", sdata->dev->name);
3804                 return;
3805         }
3806         skb_reserve(skb, local->hw.extra_tx_headroom);
3807
3808         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3809         memset(nullfunc, 0, 24);
3810         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3811                          IEEE80211_FCTL_TODS);
3812         if (powersave)
3813                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3814         nullfunc->frame_control = fc;
3815         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3816         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3817         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3818
3819         ieee80211_sta_tx(sdata->dev, skb, 0);
3820 }
3821
3822
3823 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3824 {
3825         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3826             ieee80211_vif_is_mesh(&sdata->vif))
3827                 ieee80211_sta_timer((unsigned long)sdata);
3828 }
3829
3830 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3831 {
3832         struct ieee80211_local *local = hw_to_local(hw);
3833         struct net_device *dev = local->scan_dev;
3834         struct ieee80211_sub_if_data *sdata;
3835         union iwreq_data wrqu;
3836
3837         local->last_scan_completed = jiffies;
3838         memset(&wrqu, 0, sizeof(wrqu));
3839         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3840
3841         if (local->sta_hw_scanning) {
3842                 local->sta_hw_scanning = 0;
3843                 if (ieee80211_hw_config(local))
3844                         printk(KERN_DEBUG "%s: failed to restore operational "
3845                                "channel after scan\n", dev->name);
3846                 /* Restart STA timer for HW scan case */
3847                 rcu_read_lock();
3848                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3849                         ieee80211_restart_sta_timer(sdata);
3850                 rcu_read_unlock();
3851
3852                 goto done;
3853         }
3854
3855         local->sta_sw_scanning = 0;
3856         if (ieee80211_hw_config(local))
3857                 printk(KERN_DEBUG "%s: failed to restore operational "
3858                        "channel after scan\n", dev->name);
3859
3860
3861         netif_tx_lock_bh(local->mdev);
3862         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3863         local->ops->configure_filter(local_to_hw(local),
3864                                      FIF_BCN_PRBRESP_PROMISC,
3865                                      &local->filter_flags,
3866                                      local->mdev->mc_count,
3867                                      local->mdev->mc_list);
3868
3869         netif_tx_unlock_bh(local->mdev);
3870
3871         rcu_read_lock();
3872         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3873
3874                 /* No need to wake the master device. */
3875                 if (sdata->dev == local->mdev)
3876                         continue;
3877
3878                 /* Tell AP we're back */
3879                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3880                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3881                         ieee80211_send_nullfunc(local, sdata, 0);
3882
3883                 ieee80211_restart_sta_timer(sdata);
3884
3885                 netif_wake_queue(sdata->dev);
3886         }
3887         rcu_read_unlock();
3888
3889 done:
3890         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3891         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3892                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3893                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3894                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3895                     !ieee80211_sta_active_ibss(dev)))
3896                         ieee80211_sta_find_ibss(dev, ifsta);
3897         }
3898 }
3899 EXPORT_SYMBOL(ieee80211_scan_completed);
3900
3901 void ieee80211_sta_scan_work(struct work_struct *work)
3902 {
3903         struct ieee80211_local *local =
3904                 container_of(work, struct ieee80211_local, scan_work.work);
3905         struct net_device *dev = local->scan_dev;
3906         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3907         struct ieee80211_supported_band *sband;
3908         struct ieee80211_channel *chan;
3909         int skip;
3910         unsigned long next_delay = 0;
3911
3912         if (!local->sta_sw_scanning)
3913                 return;
3914
3915         switch (local->scan_state) {
3916         case SCAN_SET_CHANNEL:
3917                 /*
3918                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3919                  * after we successfully scanned the last channel of the last
3920                  * band (and the last band is supported by the hw)
3921                  */
3922                 if (local->scan_band < IEEE80211_NUM_BANDS)
3923                         sband = local->hw.wiphy->bands[local->scan_band];
3924                 else
3925                         sband = NULL;
3926
3927                 /*
3928                  * If we are at an unsupported band and have more bands
3929                  * left to scan, advance to the next supported one.
3930                  */
3931                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3932                         local->scan_band++;
3933                         sband = local->hw.wiphy->bands[local->scan_band];
3934                         local->scan_channel_idx = 0;
3935                 }
3936
3937                 /* if no more bands/channels left, complete scan */
3938                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3939                         ieee80211_scan_completed(local_to_hw(local));
3940                         return;
3941                 }
3942                 skip = 0;
3943                 chan = &sband->channels[local->scan_channel_idx];
3944
3945                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3946                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3947                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3948                         skip = 1;
3949
3950                 if (!skip) {
3951                         local->scan_channel = chan;
3952                         if (ieee80211_hw_config(local)) {
3953                                 printk(KERN_DEBUG "%s: failed to set freq to "
3954                                        "%d MHz for scan\n", dev->name,
3955                                        chan->center_freq);
3956                                 skip = 1;
3957                         }
3958                 }
3959
3960                 /* advance state machine to next channel/band */
3961                 local->scan_channel_idx++;
3962                 if (local->scan_channel_idx >= sband->n_channels) {
3963                         /*
3964                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3965                          * we'll catch that case above and complete the scan
3966                          * if that is the case.
3967                          */
3968                         local->scan_band++;
3969                         local->scan_channel_idx = 0;
3970                 }
3971
3972                 if (skip)
3973                         break;
3974
3975                 next_delay = IEEE80211_PROBE_DELAY +
3976                              usecs_to_jiffies(local->hw.channel_change_time);
3977                 local->scan_state = SCAN_SEND_PROBE;
3978                 break;
3979         case SCAN_SEND_PROBE:
3980                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3981                 local->scan_state = SCAN_SET_CHANNEL;
3982
3983                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3984                         break;
3985                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3986                                          local->scan_ssid_len);
3987                 next_delay = IEEE80211_CHANNEL_TIME;
3988                 break;
3989         }
3990
3991         if (local->sta_sw_scanning)
3992                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3993                                    next_delay);
3994 }
3995
3996
3997 static int ieee80211_sta_start_scan(struct net_device *dev,
3998                                     u8 *ssid, size_t ssid_len)
3999 {
4000         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4001         struct ieee80211_sub_if_data *sdata;
4002
4003         if (ssid_len > IEEE80211_MAX_SSID_LEN)
4004                 return -EINVAL;
4005
4006         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
4007          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4008          * BSSID: MACAddress
4009          * SSID
4010          * ScanType: ACTIVE, PASSIVE
4011          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4012          *    a Probe frame during active scanning
4013          * ChannelList
4014          * MinChannelTime (>= ProbeDelay), in TU
4015          * MaxChannelTime: (>= MinChannelTime), in TU
4016          */
4017
4018          /* MLME-SCAN.confirm
4019           * BSSDescriptionSet
4020           * ResultCode: SUCCESS, INVALID_PARAMETERS
4021          */
4022
4023         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4024                 if (local->scan_dev == dev)
4025                         return 0;
4026                 return -EBUSY;
4027         }
4028
4029         if (local->ops->hw_scan) {
4030                 int rc = local->ops->hw_scan(local_to_hw(local),
4031                                              ssid, ssid_len);
4032                 if (!rc) {
4033                         local->sta_hw_scanning = 1;
4034                         local->scan_dev = dev;
4035                 }
4036                 return rc;
4037         }
4038
4039         local->sta_sw_scanning = 1;
4040
4041         rcu_read_lock();
4042         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4043
4044                 /* Don't stop the master interface, otherwise we can't transmit
4045                  * probes! */
4046                 if (sdata->dev == local->mdev)
4047                         continue;
4048
4049                 netif_stop_queue(sdata->dev);
4050                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4051                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4052                         ieee80211_send_nullfunc(local, sdata, 1);
4053         }
4054         rcu_read_unlock();
4055
4056         if (ssid) {
4057                 local->scan_ssid_len = ssid_len;
4058                 memcpy(local->scan_ssid, ssid, ssid_len);
4059         } else
4060                 local->scan_ssid_len = 0;
4061         local->scan_state = SCAN_SET_CHANNEL;
4062         local->scan_channel_idx = 0;
4063         local->scan_band = IEEE80211_BAND_2GHZ;
4064         local->scan_dev = dev;
4065
4066         netif_tx_lock_bh(local->mdev);
4067         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4068         local->ops->configure_filter(local_to_hw(local),
4069                                      FIF_BCN_PRBRESP_PROMISC,
4070                                      &local->filter_flags,
4071                                      local->mdev->mc_count,
4072                                      local->mdev->mc_list);
4073         netif_tx_unlock_bh(local->mdev);
4074
4075         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4076         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4077                            IEEE80211_CHANNEL_TIME);
4078
4079         return 0;
4080 }
4081
4082
4083 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4084 {
4085         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4086         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4087         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4088
4089         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4090                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4091
4092         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4093                 if (local->scan_dev == dev)
4094                         return 0;
4095                 return -EBUSY;
4096         }
4097
4098         ifsta->scan_ssid_len = ssid_len;
4099         if (ssid_len)
4100                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4101         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4102         queue_work(local->hw.workqueue, &ifsta->work);
4103         return 0;
4104 }
4105
4106 static char *
4107 ieee80211_sta_scan_result(struct net_device *dev,
4108                           struct iw_request_info *info,
4109                           struct ieee80211_sta_bss *bss,
4110                           char *current_ev, char *end_buf)
4111 {
4112         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4113         struct iw_event iwe;
4114
4115         if (time_after(jiffies,
4116                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4117                 return current_ev;
4118
4119         memset(&iwe, 0, sizeof(iwe));
4120         iwe.cmd = SIOCGIWAP;
4121         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4122         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4123         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4124                                           IW_EV_ADDR_LEN);
4125
4126         memset(&iwe, 0, sizeof(iwe));
4127         iwe.cmd = SIOCGIWESSID;
4128         if (bss_mesh_cfg(bss)) {
4129                 iwe.u.data.length = bss_mesh_id_len(bss);
4130                 iwe.u.data.flags = 1;
4131                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4132                                                   &iwe, bss_mesh_id(bss));
4133         } else {
4134                 iwe.u.data.length = bss->ssid_len;
4135                 iwe.u.data.flags = 1;
4136                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4137                                                   &iwe, bss->ssid);
4138         }
4139
4140         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4141             || bss_mesh_cfg(bss)) {
4142                 memset(&iwe, 0, sizeof(iwe));
4143                 iwe.cmd = SIOCGIWMODE;
4144                 if (bss_mesh_cfg(bss))
4145                         iwe.u.mode = IW_MODE_MESH;
4146                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4147                         iwe.u.mode = IW_MODE_MASTER;
4148                 else
4149                         iwe.u.mode = IW_MODE_ADHOC;
4150                 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4151                                                   &iwe, IW_EV_UINT_LEN);
4152         }
4153
4154         memset(&iwe, 0, sizeof(iwe));
4155         iwe.cmd = SIOCGIWFREQ;
4156         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4157         iwe.u.freq.e = 0;
4158         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4159                                           IW_EV_FREQ_LEN);
4160
4161         memset(&iwe, 0, sizeof(iwe));
4162         iwe.cmd = SIOCGIWFREQ;
4163         iwe.u.freq.m = bss->freq;
4164         iwe.u.freq.e = 6;
4165         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4166                                           IW_EV_FREQ_LEN);
4167         memset(&iwe, 0, sizeof(iwe));
4168         iwe.cmd = IWEVQUAL;
4169         iwe.u.qual.qual = bss->qual;
4170         iwe.u.qual.level = bss->signal;
4171         iwe.u.qual.noise = bss->noise;
4172         iwe.u.qual.updated = local->wstats_flags;
4173         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4174                                           IW_EV_QUAL_LEN);
4175
4176         memset(&iwe, 0, sizeof(iwe));
4177         iwe.cmd = SIOCGIWENCODE;
4178         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4179                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4180         else
4181                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4182         iwe.u.data.length = 0;
4183         current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4184                                           &iwe, "");
4185
4186         if (bss && bss->wpa_ie) {
4187                 memset(&iwe, 0, sizeof(iwe));
4188                 iwe.cmd = IWEVGENIE;
4189                 iwe.u.data.length = bss->wpa_ie_len;
4190                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4191                                                   &iwe, bss->wpa_ie);
4192         }
4193
4194         if (bss && bss->rsn_ie) {
4195                 memset(&iwe, 0, sizeof(iwe));
4196                 iwe.cmd = IWEVGENIE;
4197                 iwe.u.data.length = bss->rsn_ie_len;
4198                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4199                                                   &iwe, bss->rsn_ie);
4200         }
4201
4202         if (bss && bss->ht_ie) {
4203                 memset(&iwe, 0, sizeof(iwe));
4204                 iwe.cmd = IWEVGENIE;
4205                 iwe.u.data.length = bss->ht_ie_len;
4206                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4207                                                   &iwe, bss->ht_ie);
4208         }
4209
4210         if (bss && bss->supp_rates_len > 0) {
4211                 /* display all supported rates in readable format */
4212                 char *p = current_ev + iwe_stream_lcp_len(info);
4213                 int i;
4214
4215                 memset(&iwe, 0, sizeof(iwe));
4216                 iwe.cmd = SIOCGIWRATE;
4217                 /* Those two flags are ignored... */
4218                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4219
4220                 for (i = 0; i < bss->supp_rates_len; i++) {
4221                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4222                                                         0x7f) * 500000);
4223                         p = iwe_stream_add_value(info, current_ev, p,
4224                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4225                 }
4226                 current_ev = p;
4227         }
4228
4229         if (bss) {
4230                 char *buf;
4231                 buf = kmalloc(30, GFP_ATOMIC);
4232                 if (buf) {
4233                         memset(&iwe, 0, sizeof(iwe));
4234                         iwe.cmd = IWEVCUSTOM;
4235                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4236                         iwe.u.data.length = strlen(buf);
4237                         current_ev = iwe_stream_add_point(info, current_ev,
4238                                                           end_buf,
4239                                                           &iwe, buf);
4240                         memset(&iwe, 0, sizeof(iwe));
4241                         iwe.cmd = IWEVCUSTOM;
4242                         sprintf(buf, " Last beacon: %dms ago",
4243                                 jiffies_to_msecs(jiffies - bss->last_update));
4244                         iwe.u.data.length = strlen(buf);
4245                         current_ev = iwe_stream_add_point(info, current_ev,
4246                                                           end_buf, &iwe, buf);
4247                         kfree(buf);
4248                 }
4249         }
4250
4251         if (bss_mesh_cfg(bss)) {
4252                 char *buf;
4253                 u8 *cfg = bss_mesh_cfg(bss);
4254                 buf = kmalloc(50, GFP_ATOMIC);
4255                 if (buf) {
4256                         memset(&iwe, 0, sizeof(iwe));
4257                         iwe.cmd = IWEVCUSTOM;
4258                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4259                         iwe.u.data.length = strlen(buf);
4260                         current_ev = iwe_stream_add_point(info, current_ev,
4261                                                           end_buf,
4262                                                           &iwe, buf);
4263                         sprintf(buf, "Path Selection Protocol ID: "
4264                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4265                                                         cfg[4]);
4266                         iwe.u.data.length = strlen(buf);
4267                         current_ev = iwe_stream_add_point(info, current_ev,
4268                                                           end_buf,
4269                                                           &iwe, buf);
4270                         sprintf(buf, "Path Selection Metric ID: "
4271                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4272                                                         cfg[8]);
4273                         iwe.u.data.length = strlen(buf);
4274                         current_ev = iwe_stream_add_point(info, current_ev,
4275                                                           end_buf,
4276                                                           &iwe, buf);
4277                         sprintf(buf, "Congestion Control Mode ID: "
4278                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4279                                                         cfg[11], cfg[12]);
4280                         iwe.u.data.length = strlen(buf);
4281                         current_ev = iwe_stream_add_point(info, current_ev,
4282                                                           end_buf,
4283                                                           &iwe, buf);
4284                         sprintf(buf, "Channel Precedence: "
4285                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4286                                                         cfg[15], cfg[16]);
4287                         iwe.u.data.length = strlen(buf);
4288                         current_ev = iwe_stream_add_point(info, current_ev,
4289                                                           end_buf,
4290                                                           &iwe, buf);
4291                         kfree(buf);
4292                 }
4293         }
4294
4295         return current_ev;
4296 }
4297
4298
4299 int ieee80211_sta_scan_results(struct net_device *dev,
4300                                struct iw_request_info *info,
4301                                char *buf, size_t len)
4302 {
4303         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4304         char *current_ev = buf;
4305         char *end_buf = buf + len;
4306         struct ieee80211_sta_bss *bss;
4307
4308         spin_lock_bh(&local->sta_bss_lock);
4309         list_for_each_entry(bss, &local->sta_bss_list, list) {
4310                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4311                         spin_unlock_bh(&local->sta_bss_lock);
4312                         return -E2BIG;
4313                 }
4314                 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4315                                                        current_ev, end_buf);
4316         }
4317         spin_unlock_bh(&local->sta_bss_lock);
4318         return current_ev - buf;
4319 }
4320
4321
4322 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4323 {
4324         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4325         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4326
4327         kfree(ifsta->extra_ie);
4328         if (len == 0) {
4329                 ifsta->extra_ie = NULL;
4330                 ifsta->extra_ie_len = 0;
4331                 return 0;
4332         }
4333         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4334         if (!ifsta->extra_ie) {
4335                 ifsta->extra_ie_len = 0;
4336                 return -ENOMEM;
4337         }
4338         memcpy(ifsta->extra_ie, ie, len);
4339         ifsta->extra_ie_len = len;
4340         return 0;
4341 }
4342
4343
4344 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4345                                         struct sk_buff *skb, u8 *bssid,
4346                                         u8 *addr, u64 supp_rates)
4347 {
4348         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4349         struct sta_info *sta;
4350         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4351         DECLARE_MAC_BUF(mac);
4352         int band = local->hw.conf.channel->band;
4353
4354         /* TODO: Could consider removing the least recently used entry and
4355          * allow new one to be added. */
4356         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4357                 if (net_ratelimit()) {
4358                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4359                                "entry %s\n", dev->name, print_mac(mac, addr));
4360                 }
4361                 return NULL;
4362         }
4363
4364         if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4365                 return NULL;
4366
4367 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4368         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4369                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4370 #endif
4371
4372         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4373         if (!sta)
4374                 return NULL;
4375
4376         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4377
4378         if (supp_rates)
4379                 sta->supp_rates[band] = supp_rates;
4380         else
4381                 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4382
4383         rate_control_rate_init(sta, local);
4384
4385         if (sta_info_insert(sta))
4386                 return NULL;
4387
4388         return sta;
4389 }
4390
4391
4392 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4393 {
4394         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4395         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4396
4397         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4398                dev->name, reason);
4399
4400         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4401             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4402                 return -EINVAL;
4403
4404         ieee80211_send_deauth(dev, ifsta, reason);
4405         ieee80211_set_disassoc(dev, ifsta, 1);
4406         return 0;
4407 }
4408
4409
4410 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4411 {
4412         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4413         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4414
4415         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4416                dev->name, reason);
4417
4418         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4419                 return -EINVAL;
4420
4421         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4422                 return -1;
4423
4424         ieee80211_send_disassoc(dev, ifsta, reason);
4425         ieee80211_set_disassoc(dev, ifsta, 0);
4426         return 0;
4427 }
4428
4429 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4430                           enum ieee80211_notification_types  notif_type)
4431 {
4432         struct ieee80211_local *local = hw_to_local(hw);
4433         struct ieee80211_sub_if_data *sdata;
4434
4435         switch (notif_type) {
4436         case IEEE80211_NOTIFY_RE_ASSOC:
4437                 rcu_read_lock();
4438                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4439
4440                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4441                                 ieee80211_sta_req_auth(sdata->dev,
4442                                                        &sdata->u.sta);
4443                         }
4444
4445                 }
4446                 rcu_read_unlock();
4447                 break;
4448         }
4449 }
4450 EXPORT_SYMBOL(ieee80211_notify_mac);