Pileus Git - ~andy/linux/blob - net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "rate.h"
  34 #include "led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 /* mgmt header + 1 byte action code */
  63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  64
  65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  70
  71 /* next values represent the buffer size for A-MPDU frame.
  72  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  73 #define IEEE80211_MIN_AMPDU_BUF 0x8
  74 #define IEEE80211_MAX_AMPDU_BUF 0x40
  75
  76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  77                                      u8 *ssid, size_t ssid_len);
  78 static struct ieee80211_sta_bss *
  79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  80                      u8 *ssid, u8 ssid_len);
  81 static void ieee80211_rx_bss_put(struct net_device *dev,
  82                                  struct ieee80211_sta_bss *bss);
  83 static int ieee80211_sta_find_ibss(struct net_device *dev,
  84                                    struct ieee80211_if_sta *ifsta);
  85 static int ieee80211_sta_wep_configured(struct net_device *dev);
  86 static int ieee80211_sta_start_scan(struct net_device *dev,
  87                                     u8 *ssid, size_t ssid_len);
  88 static int ieee80211_sta_config_auth(struct net_device *dev,
  89                                      struct ieee80211_if_sta *ifsta);
  90 static void sta_rx_agg_session_timer_expired(unsigned long data);
  91
  92
  93 void ieee802_11_parse_elems(u8 *start, size_t len,
  94                             struct ieee802_11_elems *elems)
  95 {
  96         size_t left = len;
  97         u8 *pos = start;
  98
  99         memset(elems, 0, sizeof(*elems));
 100
 101         while (left >= 2) {
 102                 u8 id, elen;
 103
 104                 id = *pos++;
 105                 elen = *pos++;
 106                 left -= 2;
 107
 108                 if (elen > left)
 109                         return;
 110
 111                 switch (id) {
 112                 case WLAN_EID_SSID:
 113                         elems->ssid = pos;
 114                         elems->ssid_len = elen;
 115                         break;
 116                 case WLAN_EID_SUPP_RATES:
 117                         elems->supp_rates = pos;
 118                         elems->supp_rates_len = elen;
 119                         break;
 120                 case WLAN_EID_FH_PARAMS:
 121                         elems->fh_params = pos;
 122                         elems->fh_params_len = elen;
 123                         break;
 124                 case WLAN_EID_DS_PARAMS:
 125                         elems->ds_params = pos;
 126                         elems->ds_params_len = elen;
 127                         break;
 128                 case WLAN_EID_CF_PARAMS:
 129                         elems->cf_params = pos;
 130                         elems->cf_params_len = elen;
 131                         break;
 132                 case WLAN_EID_TIM:
 133                         elems->tim = pos;
 134                         elems->tim_len = elen;
 135                         break;
 136                 case WLAN_EID_IBSS_PARAMS:
 137                         elems->ibss_params = pos;
 138                         elems->ibss_params_len = elen;
 139                         break;
 140                 case WLAN_EID_CHALLENGE:
 141                         elems->challenge = pos;
 142                         elems->challenge_len = elen;
 143                         break;
 144                 case WLAN_EID_WPA:
 145                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 146                             pos[2] == 0xf2) {
 147                                 /* Microsoft OUI (00:50:F2) */
 148                                 if (pos[3] == 1) {
 149                                         /* OUI Type 1 - WPA IE */
 150                                         elems->wpa = pos;
 151                                         elems->wpa_len = elen;
 152                                 } else if (elen >= 5 && pos[3] == 2) {
 153                                         if (pos[4] == 0) {
 154                                                 elems->wmm_info = pos;
 155                                                 elems->wmm_info_len = elen;
 156                                         } else if (pos[4] == 1) {
 157                                                 elems->wmm_param = pos;
 158                                                 elems->wmm_param_len = elen;
 159                                         }
 160                                 }
 161                         }
 162                         break;
 163                 case WLAN_EID_RSN:
 164                         elems->rsn = pos;
 165                         elems->rsn_len = elen;
 166                         break;
 167                 case WLAN_EID_ERP_INFO:
 168                         elems->erp_info = pos;
 169                         elems->erp_info_len = elen;
 170                         break;
 171                 case WLAN_EID_EXT_SUPP_RATES:
 172                         elems->ext_supp_rates = pos;
 173                         elems->ext_supp_rates_len = elen;
 174                         break;
 175                 case WLAN_EID_HT_CAPABILITY:
 176                         elems->ht_cap_elem = pos;
 177                         elems->ht_cap_elem_len = elen;
 178                         break;
 179                 case WLAN_EID_HT_EXTRA_INFO:
 180                         elems->ht_info_elem = pos;
 181                         elems->ht_info_elem_len = elen;
 182                         break;
 183                 case WLAN_EID_MESH_ID:
 184                         elems->mesh_id = pos;
 185                         elems->mesh_id_len = elen;
 186                         break;
 187                 case WLAN_EID_MESH_CONFIG:
 188                         elems->mesh_config = pos;
 189                         elems->mesh_config_len = elen;
 190                         break;
 191                 case WLAN_EID_PEER_LINK:
 192                         elems->peer_link = pos;
 193                         elems->peer_link_len = elen;
 194                         break;
 195                 case WLAN_EID_PREQ:
 196                         elems->preq = pos;
 197                         elems->preq_len = elen;
 198                         break;
 199                 case WLAN_EID_PREP:
 200                         elems->prep = pos;
 201                         elems->prep_len = elen;
 202                         break;
 203                 case WLAN_EID_PERR:
 204                         elems->perr = pos;
 205                         elems->perr_len = elen;
 206                         break;
 207                 case WLAN_EID_CHANNEL_SWITCH:
 208                         elems->ch_switch_elem = pos;
 209                         elems->ch_switch_elem_len = elen;
 210                         break;
 211                 case WLAN_EID_QUIET:
 212                         if (!elems->quiet_elem) {
 213                                 elems->quiet_elem = pos;
 214                                 elems->quiet_elem_len = elen;
 215                         }
 216                         elems->num_of_quiet_elem++;
 217                         break;
 218                 case WLAN_EID_COUNTRY:
 219                         elems->country_elem = pos;
 220                         elems->country_elem_len = elen;
 221                         break;
 222                 case WLAN_EID_PWR_CONSTRAINT:
 223                         elems->pwr_constr_elem = pos;
 224                         elems->pwr_constr_elem_len = elen;
 225                         break;
 226                 default:
 227                         break;
 228                 }
 229
 230                 left -= elen;
 231                 pos += elen;
 232         }
 233 }
 234
 235
 236 static int ecw2cw(int ecw)
 237 {
 238         return (1 << ecw) - 1;
 239 }
 240
 241
 242 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 243                                          struct ieee80211_sta_bss *bss,
 244                                          int ibss)
 245 {
 246         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 247         struct ieee80211_local *local = sdata->local;
 248         int i, have_higher_than_11mbit = 0;
 249
 250
 251         /* cf. IEEE 802.11 9.2.12 */
 252         for (i = 0; i < bss->supp_rates_len; i++)
 253                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 254                         have_higher_than_11mbit = 1;
 255
 256         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 257             have_higher_than_11mbit)
 258                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 259         else
 260                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 261
 262
 263         if (local->ops->conf_tx) {
 264                 struct ieee80211_tx_queue_params qparam;
 265
 266                 memset(&qparam, 0, sizeof(qparam));
 267
 268                 qparam.aifs = 2;
 269
 270                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 271                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 272                         qparam.cw_min = 31;
 273                 else
 274                         qparam.cw_min = 15;
 275
 276                 qparam.cw_max = 1023;
 277                 qparam.txop = 0;
 278
 279                 for (i = 0; i < local_to_hw(local)->queues; i++)
 280                         local->ops->conf_tx(local_to_hw(local), i, &qparam);
 281         }
 282 }
 283
 284 static void ieee80211_sta_wmm_params(struct net_device *dev,
 285                                      struct ieee80211_if_sta *ifsta,
 286                                      u8 *wmm_param, size_t wmm_param_len)
 287 {
 288         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 289         struct ieee80211_tx_queue_params params;
 290         size_t left;
 291         int count;
 292         u8 *pos;
 293
 294         if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
 295                 return;
 296
 297         if (!wmm_param)
 298                 return;
 299
 300         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 301                 return;
 302         count = wmm_param[6] & 0x0f;
 303         if (count == ifsta->wmm_last_param_set)
 304                 return;
 305         ifsta->wmm_last_param_set = count;
 306
 307         pos = wmm_param + 8;
 308         left = wmm_param_len - 8;
 309
 310         memset(&params, 0, sizeof(params));
 311
 312         if (!local->ops->conf_tx)
 313                 return;
 314
 315         local->wmm_acm = 0;
 316         for (; left >= 4; left -= 4, pos += 4) {
 317                 int aci = (pos[0] >> 5) & 0x03;
 318                 int acm = (pos[0] >> 4) & 0x01;
 319                 int queue;
 320
 321                 switch (aci) {
 322                 case 1:
 323                         queue = 3;
 324                         if (acm)
 325                                 local->wmm_acm |= BIT(0) | BIT(3);
 326                         break;
 327                 case 2:
 328                         queue = 1;
 329                         if (acm)
 330                                 local->wmm_acm |= BIT(4) | BIT(5);
 331                         break;
 332                 case 3:
 333                         queue = 0;
 334                         if (acm)
 335                                 local->wmm_acm |= BIT(6) | BIT(7);
 336                         break;
 337                 case 0:
 338                 default:
 339                         queue = 2;
 340                         if (acm)
 341                                 local->wmm_acm |= BIT(1) | BIT(2);
 342                         break;
 343                 }
 344
 345                 params.aifs = pos[0] & 0x0f;
 346                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 347                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 348                 params.txop = pos[2] | (pos[3] << 8);
 349 #ifdef CONFIG_MAC80211_DEBUG
 350                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 351                        "cWmin=%d cWmax=%d txop=%d\n",
 352                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 353                        params.cw_max, params.txop);
 354 #endif
 355                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 356                  * AC for now) */
 357                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 358                         printk(KERN_DEBUG "%s: failed to set TX queue "
 359                                "parameters for queue %d\n", dev->name, queue);
 360                 }
 361         }
 362 }
 363
 364 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 365                                            bool use_protection,
 366                                            bool use_short_preamble)
 367 {
 368         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 369         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 370         DECLARE_MAC_BUF(mac);
 371         u32 changed = 0;
 372
 373         if (use_protection != bss_conf->use_cts_prot) {
 374                 if (net_ratelimit()) {
 375                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 376                                "%s)\n",
 377                                sdata->dev->name,
 378                                use_protection ? "enabled" : "disabled",
 379                                print_mac(mac, ifsta->bssid));
 380                 }
 381                 bss_conf->use_cts_prot = use_protection;
 382                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 383         }
 384
 385         if (use_short_preamble != bss_conf->use_short_preamble) {
 386                 if (net_ratelimit()) {
 387                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 388                                " (BSSID=%s)\n",
 389                                sdata->dev->name,
 390                                use_short_preamble ? "short" : "long",
 391                                print_mac(mac, ifsta->bssid));
 392                 }
 393                 bss_conf->use_short_preamble = use_short_preamble;
 394                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 395         }
 396
 397         return changed;
 398 }
 399
 400 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 401                                    u8 erp_value)
 402 {
 403         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 404         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 405
 406         return ieee80211_handle_protect_preamb(sdata,
 407                         use_protection, use_short_preamble);
 408 }
 409
 410 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 411                                            struct ieee80211_sta_bss *bss)
 412 {
 413         u32 changed = 0;
 414
 415         if (bss->has_erp_value)
 416                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 417         else {
 418                 u16 capab = bss->capability;
 419                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 420                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 421         }
 422
 423         return changed;
 424 }
 425
 426 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 427                                    struct ieee80211_ht_info *ht_info)
 428 {
 429
 430         if (ht_info == NULL)
 431                 return -EINVAL;
 432
 433         memset(ht_info, 0, sizeof(*ht_info));
 434
 435         if (ht_cap_ie) {
 436                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 437
 438                 ht_info->ht_supported = 1;
 439                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 440                 ht_info->ampdu_factor =
 441                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 442                 ht_info->ampdu_density =
 443                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 444                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 445         } else
 446                 ht_info->ht_supported = 0;
 447
 448         return 0;
 449 }
 450
 451 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 452                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 453                         struct ieee80211_ht_bss_info *bss_info)
 454 {
 455         if (bss_info == NULL)
 456                 return -EINVAL;
 457
 458         memset(bss_info, 0, sizeof(*bss_info));
 459
 460         if (ht_add_info_ie) {
 461                 u16 op_mode;
 462                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 463
 464                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 465                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 466                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 467         }
 468
 469         return 0;
 470 }
 471
 472 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 473                                          struct ieee80211_if_sta *ifsta)
 474 {
 475         char *buf;
 476         size_t len;
 477         int i;
 478         union iwreq_data wrqu;
 479
 480         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 481                 return;
 482
 483         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 484                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 485         if (!buf)
 486                 return;
 487
 488         len = sprintf(buf, "ASSOCINFO(");
 489         if (ifsta->assocreq_ies) {
 490                 len += sprintf(buf + len, "ReqIEs=");
 491                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 492                         len += sprintf(buf + len, "%02x",
 493                                        ifsta->assocreq_ies[i]);
 494                 }
 495         }
 496         if (ifsta->assocresp_ies) {
 497                 if (ifsta->assocreq_ies)
 498                         len += sprintf(buf + len, " ");
 499                 len += sprintf(buf + len, "RespIEs=");
 500                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 501                         len += sprintf(buf + len, "%02x",
 502                                        ifsta->assocresp_ies[i]);
 503                 }
 504         }
 505         len += sprintf(buf + len, ")");
 506
 507         if (len > IW_CUSTOM_MAX) {
 508                 len = sprintf(buf, "ASSOCRESPIE=");
 509                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 510                         len += sprintf(buf + len, "%02x",
 511                                        ifsta->assocresp_ies[i]);
 512                 }
 513         }
 514
 515         memset(&wrqu, 0, sizeof(wrqu));
 516         wrqu.data.length = len;
 517         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 518
 519         kfree(buf);
 520 }
 521
 522
 523 static void ieee80211_set_associated(struct net_device *dev,
 524                                      struct ieee80211_if_sta *ifsta,
 525                                      bool assoc)
 526 {
 527         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 528         struct ieee80211_local *local = sdata->local;
 529         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 530         union iwreq_data wrqu;
 531         u32 changed = BSS_CHANGED_ASSOC;
 532
 533         if (assoc) {
 534                 struct ieee80211_sta_bss *bss;
 535
 536                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 537
 538                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 539                         return;
 540
 541                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 542                                            conf->channel->center_freq,
 543                                            ifsta->ssid, ifsta->ssid_len);
 544                 if (bss) {
 545                         /* set timing information */
 546                         sdata->bss_conf.beacon_int = bss->beacon_int;
 547                         sdata->bss_conf.timestamp = bss->timestamp;
 548
 549                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 550
 551                         ieee80211_rx_bss_put(dev, bss);
 552                 }
 553
 554                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 555                         changed |= BSS_CHANGED_HT;
 556                         sdata->bss_conf.assoc_ht = 1;
 557                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 558                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 559                 }
 560
 561                 netif_carrier_on(dev);
 562                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 563                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 564                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 565                 ieee80211_sta_send_associnfo(dev, ifsta);
 566         } else {
 567                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 568                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 569                 netif_carrier_off(dev);
 570                 ieee80211_reset_erp_info(dev);
 571
 572                 sdata->bss_conf.assoc_ht = 0;
 573                 sdata->bss_conf.ht_conf = NULL;
 574                 sdata->bss_conf.ht_bss_conf = NULL;
 575
 576                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 577         }
 578         ifsta->last_probe = jiffies;
 579         ieee80211_led_assoc(local, assoc);
 580
 581         sdata->bss_conf.assoc = assoc;
 582         ieee80211_bss_info_change_notify(sdata, changed);
 583         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 584         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 585 }
 586
 587 static void ieee80211_set_disassoc(struct net_device *dev,
 588                                    struct ieee80211_if_sta *ifsta, int deauth)
 589 {
 590         if (deauth)
 591                 ifsta->auth_tries = 0;
 592         ifsta->assoc_tries = 0;
 593         ieee80211_set_associated(dev, ifsta, 0);
 594 }
 595
 596 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 597                       int encrypt)
 598 {
 599         struct ieee80211_sub_if_data *sdata;
 600         struct ieee80211_tx_info *info;
 601
 602         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 603         skb->dev = sdata->local->mdev;
 604         skb_set_mac_header(skb, 0);
 605         skb_set_network_header(skb, 0);
 606         skb_set_transport_header(skb, 0);
 607
 608         info = IEEE80211_SKB_CB(skb);
 609         memset(info, 0, sizeof(struct ieee80211_tx_info));
 610         info->control.ifindex = sdata->dev->ifindex;
 611         if (!encrypt)
 612                 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
 613
 614         dev_queue_xmit(skb);
 615 }
 616
 617
 618 static void ieee80211_send_auth(struct net_device *dev,
 619                                 struct ieee80211_if_sta *ifsta,
 620                                 int transaction, u8 *extra, size_t extra_len,
 621                                 int encrypt)
 622 {
 623         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 624         struct sk_buff *skb;
 625         struct ieee80211_mgmt *mgmt;
 626
 627         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 628                             sizeof(*mgmt) + 6 + extra_len);
 629         if (!skb) {
 630                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 631                        "frame\n", dev->name);
 632                 return;
 633         }
 634         skb_reserve(skb, local->hw.extra_tx_headroom);
 635
 636         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 637         memset(mgmt, 0, 24 + 6);
 638         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 639                                            IEEE80211_STYPE_AUTH);
 640         if (encrypt)
 641                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 642         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 643         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 644         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 645         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 646         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 647         ifsta->auth_transaction = transaction + 1;
 648         mgmt->u.auth.status_code = cpu_to_le16(0);
 649         if (extra)
 650                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 651
 652         ieee80211_sta_tx(dev, skb, encrypt);
 653 }
 654
 655
 656 static void ieee80211_authenticate(struct net_device *dev,
 657                                    struct ieee80211_if_sta *ifsta)
 658 {
 659         DECLARE_MAC_BUF(mac);
 660
 661         ifsta->auth_tries++;
 662         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 663                 printk(KERN_DEBUG "%s: authentication with AP %s"
 664                        " timed out\n",
 665                        dev->name, print_mac(mac, ifsta->bssid));
 666                 ifsta->state = IEEE80211_DISABLED;
 667                 return;
 668         }
 669
 670         ifsta->state = IEEE80211_AUTHENTICATE;
 671         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 672                dev->name, print_mac(mac, ifsta->bssid));
 673
 674         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 675
 676         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 677 }
 678
 679 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 680                                       struct ieee80211_supported_band *sband,
 681                                       u64 *rates)
 682 {
 683         int i, j, count;
 684         *rates = 0;
 685         count = 0;
 686         for (i = 0; i < bss->supp_rates_len; i++) {
 687                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 688
 689                 for (j = 0; j < sband->n_bitrates; j++)
 690                         if (sband->bitrates[j].bitrate == rate) {
 691                                 *rates |= BIT(j);
 692                                 count++;
 693                                 break;
 694                         }
 695         }
 696
 697         return count;
 698 }
 699
 700 static void ieee80211_send_assoc(struct net_device *dev,
 701                                  struct ieee80211_if_sta *ifsta)
 702 {
 703         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 704         struct sk_buff *skb;
 705         struct ieee80211_mgmt *mgmt;
 706         u8 *pos, *ies;
 707         int i, len, count, rates_len, supp_rates_len;
 708         u16 capab;
 709         struct ieee80211_sta_bss *bss;
 710         int wmm = 0;
 711         struct ieee80211_supported_band *sband;
 712         u64 rates = 0;
 713
 714         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 715                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 716                             ifsta->ssid_len);
 717         if (!skb) {
 718                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 719                        "frame\n", dev->name);
 720                 return;
 721         }
 722         skb_reserve(skb, local->hw.extra_tx_headroom);
 723
 724         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 725
 726         capab = ifsta->capab;
 727
 728         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 729                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 730                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 731                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 732                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 733         }
 734
 735         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 736                                    local->hw.conf.channel->center_freq,
 737                                    ifsta->ssid, ifsta->ssid_len);
 738         if (bss) {
 739                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 740                         capab |= WLAN_CAPABILITY_PRIVACY;
 741                 if (bss->wmm_ie)
 742                         wmm = 1;
 743
 744                 /* get all rates supported by the device and the AP as
 745                  * some APs don't like getting a superset of their rates
 746                  * in the association request (e.g. D-Link DAP 1353 in
 747                  * b-only mode) */
 748                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 749
 750                 ieee80211_rx_bss_put(dev, bss);
 751         } else {
 752                 rates = ~0;
 753                 rates_len = sband->n_bitrates;
 754         }
 755
 756         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 757         memset(mgmt, 0, 24);
 758         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 759         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 760         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 761
 762         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 763                 skb_put(skb, 10);
 764                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 765                                                    IEEE80211_STYPE_REASSOC_REQ);
 766                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 767                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 768                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 769                        ETH_ALEN);
 770         } else {
 771                 skb_put(skb, 4);
 772                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 773                                                    IEEE80211_STYPE_ASSOC_REQ);
 774                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 775                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 776         }
 777
 778         /* SSID */
 779         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 780         *pos++ = WLAN_EID_SSID;
 781         *pos++ = ifsta->ssid_len;
 782         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 783
 784         /* add all rates which were marked to be used above */
 785         supp_rates_len = rates_len;
 786         if (supp_rates_len > 8)
 787                 supp_rates_len = 8;
 788
 789         len = sband->n_bitrates;
 790         pos = skb_put(skb, supp_rates_len + 2);
 791         *pos++ = WLAN_EID_SUPP_RATES;
 792         *pos++ = supp_rates_len;
 793
 794         count = 0;
 795         for (i = 0; i < sband->n_bitrates; i++) {
 796                 if (BIT(i) & rates) {
 797                         int rate = sband->bitrates[i].bitrate;
 798                         *pos++ = (u8) (rate / 5);
 799                         if (++count == 8)
 800                                 break;
 801                 }
 802         }
 803
 804         if (count == 8) {
 805                 pos = skb_put(skb, rates_len - count + 2);
 806                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 807                 *pos++ = rates_len - count;
 808
 809                 for (i++; i < sband->n_bitrates; i++) {
 810                         if (BIT(i) & rates) {
 811                                 int rate = sband->bitrates[i].bitrate;
 812                                 *pos++ = (u8) (rate / 5);
 813                         }
 814                 }
 815         }
 816
 817         if (ifsta->extra_ie) {
 818                 pos = skb_put(skb, ifsta->extra_ie_len);
 819                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 820         }
 821
 822         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 823                 pos = skb_put(skb, 9);
 824                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 825                 *pos++ = 7; /* len */
 826                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 827                 *pos++ = 0x50;
 828                 *pos++ = 0xf2;
 829                 *pos++ = 2; /* WME */
 830                 *pos++ = 0; /* WME info */
 831                 *pos++ = 1; /* WME ver */
 832                 *pos++ = 0;
 833         }
 834
 835         /* wmm support is a must to HT */
 836         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 837             sband->ht_info.ht_supported && bss->ht_add_ie) {
 838                 struct ieee80211_ht_addt_info *ht_add_info =
 839                         (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
 840                 u16 cap = sband->ht_info.cap;
 841                 __le16 tmp;
 842                 u32 flags = local->hw.conf.channel->flags;
 843
 844                 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
 845                 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 846                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
 847                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 848                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 849                         }
 850                         break;
 851                 case IEEE80211_HT_IE_CHA_SEC_BELOW:
 852                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
 853                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
 854                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 855                         }
 856                         break;
 857                 }
 858
 859                 tmp = cpu_to_le16(cap);
 860                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 861                 *pos++ = WLAN_EID_HT_CAPABILITY;
 862                 *pos++ = sizeof(struct ieee80211_ht_cap);
 863                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 864                 memcpy(pos, &tmp, sizeof(u16));
 865                 pos += sizeof(u16);
 866                 /* TODO: needs a define here for << 2 */
 867                 *pos++ = sband->ht_info.ampdu_factor |
 868                          (sband->ht_info.ampdu_density << 2);
 869                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 870         }
 871
 872         kfree(ifsta->assocreq_ies);
 873         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 874         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 875         if (ifsta->assocreq_ies)
 876                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 877
 878         ieee80211_sta_tx(dev, skb, 0);
 879 }
 880
 881
 882 static void ieee80211_send_deauth(struct net_device *dev,
 883                                   struct ieee80211_if_sta *ifsta, u16 reason)
 884 {
 885         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 886         struct sk_buff *skb;
 887         struct ieee80211_mgmt *mgmt;
 888
 889         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 890         if (!skb) {
 891                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 892                        "frame\n", dev->name);
 893                 return;
 894         }
 895         skb_reserve(skb, local->hw.extra_tx_headroom);
 896
 897         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 898         memset(mgmt, 0, 24);
 899         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 900         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 901         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 902         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 903                                            IEEE80211_STYPE_DEAUTH);
 904         skb_put(skb, 2);
 905         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 906
 907         ieee80211_sta_tx(dev, skb, 0);
 908 }
 909
 910
 911 static void ieee80211_send_disassoc(struct net_device *dev,
 912                                     struct ieee80211_if_sta *ifsta, u16 reason)
 913 {
 914         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 915         struct sk_buff *skb;
 916         struct ieee80211_mgmt *mgmt;
 917
 918         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 919         if (!skb) {
 920                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 921                        "frame\n", dev->name);
 922                 return;
 923         }
 924         skb_reserve(skb, local->hw.extra_tx_headroom);
 925
 926         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 927         memset(mgmt, 0, 24);
 928         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 929         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 930         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 931         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 932                                            IEEE80211_STYPE_DISASSOC);
 933         skb_put(skb, 2);
 934         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 935
 936         ieee80211_sta_tx(dev, skb, 0);
 937 }
 938
 939
 940 static int ieee80211_privacy_mismatch(struct net_device *dev,
 941                                       struct ieee80211_if_sta *ifsta)
 942 {
 943         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 944         struct ieee80211_sta_bss *bss;
 945         int bss_privacy;
 946         int wep_privacy;
 947         int privacy_invoked;
 948
 949         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 950                 return 0;
 951
 952         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 953                                    local->hw.conf.channel->center_freq,
 954                                    ifsta->ssid, ifsta->ssid_len);
 955         if (!bss)
 956                 return 0;
 957
 958         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 959         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 960         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 961
 962         ieee80211_rx_bss_put(dev, bss);
 963
 964         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 965                 return 0;
 966
 967         return 1;
 968 }
 969
 970
 971 static void ieee80211_associate(struct net_device *dev,
 972                                 struct ieee80211_if_sta *ifsta)
 973 {
 974         DECLARE_MAC_BUF(mac);
 975
 976         ifsta->assoc_tries++;
 977         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 978                 printk(KERN_DEBUG "%s: association with AP %s"
 979                        " timed out\n",
 980                        dev->name, print_mac(mac, ifsta->bssid));
 981                 ifsta->state = IEEE80211_DISABLED;
 982                 return;
 983         }
 984
 985         ifsta->state = IEEE80211_ASSOCIATE;
 986         printk(KERN_DEBUG "%s: associate with AP %s\n",
 987                dev->name, print_mac(mac, ifsta->bssid));
 988         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 989                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 990                        "mixed-cell disabled - abort association\n", dev->name);
 991                 ifsta->state = IEEE80211_DISABLED;
 992                 return;
 993         }
 994
 995         ieee80211_send_assoc(dev, ifsta);
 996
 997         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 998 }
 999
1000
1001 static void ieee80211_associated(struct net_device *dev,
1002                                  struct ieee80211_if_sta *ifsta)
1003 {
1004         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1005         struct sta_info *sta;
1006         int disassoc;
1007         DECLARE_MAC_BUF(mac);
1008
1009         /* TODO: start monitoring current AP signal quality and number of
1010          * missed beacons. Scan other channels every now and then and search
1011          * for better APs. */
1012         /* TODO: remove expired BSSes */
1013
1014         ifsta->state = IEEE80211_ASSOCIATED;
1015
1016         rcu_read_lock();
1017
1018         sta = sta_info_get(local, ifsta->bssid);
1019         if (!sta) {
1020                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1021                        dev->name, print_mac(mac, ifsta->bssid));
1022                 disassoc = 1;
1023         } else {
1024                 disassoc = 0;
1025                 if (time_after(jiffies,
1026                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1027                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1028                                 printk(KERN_DEBUG "%s: No ProbeResp from "
1029                                        "current AP %s - assume out of "
1030                                        "range\n",
1031                                        dev->name, print_mac(mac, ifsta->bssid));
1032                                 disassoc = 1;
1033                                 sta_info_unlink(&sta);
1034                         } else
1035                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1036                                                          local->scan_ssid,
1037                                                          local->scan_ssid_len);
1038                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1039                 } else {
1040                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1041                         if (time_after(jiffies, ifsta->last_probe +
1042                                        IEEE80211_PROBE_INTERVAL)) {
1043                                 ifsta->last_probe = jiffies;
1044                                 ieee80211_send_probe_req(dev, ifsta->bssid,
1045                                                          ifsta->ssid,
1046                                                          ifsta->ssid_len);
1047                         }
1048                 }
1049         }
1050
1051         rcu_read_unlock();
1052
1053         if (disassoc && sta)
1054                 sta_info_destroy(sta);
1055
1056         if (disassoc) {
1057                 ifsta->state = IEEE80211_DISABLED;
1058                 ieee80211_set_associated(dev, ifsta, 0);
1059         } else {
1060                 mod_timer(&ifsta->timer, jiffies +
1061                                       IEEE80211_MONITORING_INTERVAL);
1062         }
1063 }
1064
1065
1066 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1067                                      u8 *ssid, size_t ssid_len)
1068 {
1069         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1070         struct ieee80211_supported_band *sband;
1071         struct sk_buff *skb;
1072         struct ieee80211_mgmt *mgmt;
1073         u8 *pos, *supp_rates, *esupp_rates = NULL;
1074         int i;
1075
1076         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1077         if (!skb) {
1078                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1079                        "request\n", dev->name);
1080                 return;
1081         }
1082         skb_reserve(skb, local->hw.extra_tx_headroom);
1083
1084         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1085         memset(mgmt, 0, 24);
1086         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1087                                            IEEE80211_STYPE_PROBE_REQ);
1088         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1089         if (dst) {
1090                 memcpy(mgmt->da, dst, ETH_ALEN);
1091                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1092         } else {
1093                 memset(mgmt->da, 0xff, ETH_ALEN);
1094                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1095         }
1096         pos = skb_put(skb, 2 + ssid_len);
1097         *pos++ = WLAN_EID_SSID;
1098         *pos++ = ssid_len;
1099         memcpy(pos, ssid, ssid_len);
1100
1101         supp_rates = skb_put(skb, 2);
1102         supp_rates[0] = WLAN_EID_SUPP_RATES;
1103         supp_rates[1] = 0;
1104         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1105
1106         for (i = 0; i < sband->n_bitrates; i++) {
1107                 struct ieee80211_rate *rate = &sband->bitrates[i];
1108                 if (esupp_rates) {
1109                         pos = skb_put(skb, 1);
1110                         esupp_rates[1]++;
1111                 } else if (supp_rates[1] == 8) {
1112                         esupp_rates = skb_put(skb, 3);
1113                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1114                         esupp_rates[1] = 1;
1115                         pos = &esupp_rates[2];
1116                 } else {
1117                         pos = skb_put(skb, 1);
1118                         supp_rates[1]++;
1119                 }
1120                 *pos = rate->bitrate / 5;
1121         }
1122
1123         ieee80211_sta_tx(dev, skb, 0);
1124 }
1125
1126
1127 static int ieee80211_sta_wep_configured(struct net_device *dev)
1128 {
1129         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1130         if (!sdata || !sdata->default_key ||
1131             sdata->default_key->conf.alg != ALG_WEP)
1132                 return 0;
1133         return 1;
1134 }
1135
1136
1137 static void ieee80211_auth_completed(struct net_device *dev,
1138                                      struct ieee80211_if_sta *ifsta)
1139 {
1140         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1141         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1142         ieee80211_associate(dev, ifsta);
1143 }
1144
1145
1146 static void ieee80211_auth_challenge(struct net_device *dev,
1147                                      struct ieee80211_if_sta *ifsta,
1148                                      struct ieee80211_mgmt *mgmt,
1149                                      size_t len)
1150 {
1151         u8 *pos;
1152         struct ieee802_11_elems elems;
1153
1154         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1155         pos = mgmt->u.auth.variable;
1156         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1157         if (!elems.challenge) {
1158                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1159                        "frame\n", dev->name);
1160                 return;
1161         }
1162         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1163                             elems.challenge_len + 2, 1);
1164 }
1165
1166 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1167                                         u8 dialog_token, u16 status, u16 policy,
1168                                         u16 buf_size, u16 timeout)
1169 {
1170         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1171         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1172         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1173         struct sk_buff *skb;
1174         struct ieee80211_mgmt *mgmt;
1175         u16 capab;
1176
1177         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1178
1179         if (!skb) {
1180                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1181                        "for addba resp frame\n", dev->name);
1182                 return;
1183         }
1184
1185         skb_reserve(skb, local->hw.extra_tx_headroom);
1186         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1187         memset(mgmt, 0, 24);
1188         memcpy(mgmt->da, da, ETH_ALEN);
1189         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1190         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1191                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1192         else
1193                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1194         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1195                                            IEEE80211_STYPE_ACTION);
1196
1197         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1198         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1199         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1200         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1201
1202         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1203         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1204         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1205
1206         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1207         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1208         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1209
1210         ieee80211_sta_tx(dev, skb, 0);
1211
1212         return;
1213 }
1214
1215 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1216                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1217                                 u16 agg_size, u16 timeout)
1218 {
1219         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1220         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1221         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1222         struct sk_buff *skb;
1223         struct ieee80211_mgmt *mgmt;
1224         u16 capab;
1225
1226         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1227
1228         if (!skb) {
1229                 printk(KERN_ERR "%s: failed to allocate buffer "
1230                                 "for addba request frame\n", dev->name);
1231                 return;
1232         }
1233         skb_reserve(skb, local->hw.extra_tx_headroom);
1234         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1235         memset(mgmt, 0, 24);
1236         memcpy(mgmt->da, da, ETH_ALEN);
1237         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1238         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1239                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1240         else
1241                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1242
1243         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1244                                         IEEE80211_STYPE_ACTION);
1245
1246         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1247
1248         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1249         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1250
1251         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1252         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1253         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1254         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1255
1256         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1257
1258         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1259         mgmt->u.action.u.addba_req.start_seq_num =
1260                                         cpu_to_le16(start_seq_num << 4);
1261
1262         ieee80211_sta_tx(dev, skb, 0);
1263 }
1264
1265 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1266                                                 struct ieee80211_mgmt *mgmt,
1267                                                 size_t len)
1268 {
1269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1270         struct ieee80211_hw *hw = &local->hw;
1271         struct ieee80211_conf *conf = &hw->conf;
1272         struct sta_info *sta;
1273         struct tid_ampdu_rx *tid_agg_rx;
1274         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1275         u8 dialog_token;
1276         int ret = -EOPNOTSUPP;
1277         DECLARE_MAC_BUF(mac);
1278
1279         rcu_read_lock();
1280
1281         sta = sta_info_get(local, mgmt->sa);
1282         if (!sta) {
1283                 rcu_read_unlock();
1284                 return;
1285         }
1286
1287         /* extract session parameters from addba request frame */
1288         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1289         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1290         start_seq_num =
1291                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1292
1293         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1294         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1295         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1296         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1297
1298         status = WLAN_STATUS_REQUEST_DECLINED;
1299
1300         /* sanity check for incoming parameters:
1301          * check if configuration can support the BA policy
1302          * and if buffer size does not exceeds max value */
1303         if (((ba_policy != 1)
1304                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1305                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1306                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1307 #ifdef CONFIG_MAC80211_HT_DEBUG
1308                 if (net_ratelimit())
1309                         printk(KERN_DEBUG "AddBA Req with bad params from "
1310                                 "%s on tid %u. policy %d, buffer size %d\n",
1311                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1312                                 buf_size);
1313 #endif /* CONFIG_MAC80211_HT_DEBUG */
1314                 goto end_no_lock;
1315         }
1316         /* determine default buffer size */
1317         if (buf_size == 0) {
1318                 struct ieee80211_supported_band *sband;
1319
1320                 sband = local->hw.wiphy->bands[conf->channel->band];
1321                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1322                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1323         }
1324
1325
1326         /* examine state machine */
1327         spin_lock_bh(&sta->lock);
1328
1329         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1330 #ifdef CONFIG_MAC80211_HT_DEBUG
1331                 if (net_ratelimit())
1332                         printk(KERN_DEBUG "unexpected AddBA Req from "
1333                                 "%s on tid %u\n",
1334                                 print_mac(mac, mgmt->sa), tid);
1335 #endif /* CONFIG_MAC80211_HT_DEBUG */
1336                 goto end;
1337         }
1338
1339         /* prepare A-MPDU MLME for Rx aggregation */
1340         sta->ampdu_mlme.tid_rx[tid] =
1341                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1342         if (!sta->ampdu_mlme.tid_rx[tid]) {
1343                 if (net_ratelimit())
1344                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1345                                         tid);
1346                 goto end;
1347         }
1348         /* rx timer */
1349         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1350                                 sta_rx_agg_session_timer_expired;
1351         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1352                                 (unsigned long)&sta->timer_to_tid[tid];
1353         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1354
1355         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1356
1357         /* prepare reordering buffer */
1358         tid_agg_rx->reorder_buf =
1359                 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1360         if (!tid_agg_rx->reorder_buf) {
1361                 if (net_ratelimit())
1362                         printk(KERN_ERR "can not allocate reordering buffer "
1363                                "to tid %d\n", tid);
1364                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1365                 goto end;
1366         }
1367         memset(tid_agg_rx->reorder_buf, 0,
1368                 buf_size * sizeof(struct sk_buff *));
1369
1370         if (local->ops->ampdu_action)
1371                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1372                                                sta->addr, tid, &start_seq_num);
1373 #ifdef CONFIG_MAC80211_HT_DEBUG
1374         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1375 #endif /* CONFIG_MAC80211_HT_DEBUG */
1376
1377         if (ret) {
1378                 kfree(tid_agg_rx->reorder_buf);
1379                 kfree(tid_agg_rx);
1380                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1381                 goto end;
1382         }
1383
1384         /* change state and send addba resp */
1385         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1386         tid_agg_rx->dialog_token = dialog_token;
1387         tid_agg_rx->ssn = start_seq_num;
1388         tid_agg_rx->head_seq_num = start_seq_num;
1389         tid_agg_rx->buf_size = buf_size;
1390         tid_agg_rx->timeout = timeout;
1391         tid_agg_rx->stored_mpdu_num = 0;
1392         status = WLAN_STATUS_SUCCESS;
1393 end:
1394         spin_unlock_bh(&sta->lock);
1395
1396 end_no_lock:
1397         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1398                                   dialog_token, status, 1, buf_size, timeout);
1399         rcu_read_unlock();
1400 }
1401
1402 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1403                                              struct ieee80211_mgmt *mgmt,
1404                                              size_t len)
1405 {
1406         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1407         struct ieee80211_hw *hw = &local->hw;
1408         struct sta_info *sta;
1409         u16 capab;
1410         u16 tid;
1411         u8 *state;
1412
1413         rcu_read_lock();
1414
1415         sta = sta_info_get(local, mgmt->sa);
1416         if (!sta) {
1417                 rcu_read_unlock();
1418                 return;
1419         }
1420
1421         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1422         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1423
1424         state = &sta->ampdu_mlme.tid_state_tx[tid];
1425
1426         spin_lock_bh(&sta->lock);
1427
1428         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1429                 spin_unlock_bh(&sta->lock);
1430                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1431                         "%d\n", *state);
1432                 goto addba_resp_exit;
1433         }
1434
1435         if (mgmt->u.action.u.addba_resp.dialog_token !=
1436                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1437                 spin_unlock_bh(&sta->lock);
1438 #ifdef CONFIG_MAC80211_HT_DEBUG
1439                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1440 #endif /* CONFIG_MAC80211_HT_DEBUG */
1441                 goto addba_resp_exit;
1442         }
1443
1444         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1445 #ifdef CONFIG_MAC80211_HT_DEBUG
1446         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1447 #endif /* CONFIG_MAC80211_HT_DEBUG */
1448         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1449                         == WLAN_STATUS_SUCCESS) {
1450                 if (*state & HT_ADDBA_RECEIVED_MSK)
1451                         printk(KERN_DEBUG "double addBA response\n");
1452
1453                 *state |= HT_ADDBA_RECEIVED_MSK;
1454                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1455
1456                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1457                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1458                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1459                 }
1460
1461                 spin_unlock_bh(&sta->lock);
1462                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1463         } else {
1464                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1465
1466                 sta->ampdu_mlme.addba_req_num[tid]++;
1467                 /* this will allow the state check in stop_BA_session */
1468                 *state = HT_AGG_STATE_OPERATIONAL;
1469                 spin_unlock_bh(&sta->lock);
1470                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1471                                              WLAN_BACK_INITIATOR);
1472         }
1473
1474 addba_resp_exit:
1475         rcu_read_unlock();
1476 }
1477
1478 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1479                           u16 initiator, u16 reason_code)
1480 {
1481         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1482         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1483         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1484         struct sk_buff *skb;
1485         struct ieee80211_mgmt *mgmt;
1486         u16 params;
1487
1488         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1489
1490         if (!skb) {
1491                 printk(KERN_ERR "%s: failed to allocate buffer "
1492                                         "for delba frame\n", dev->name);
1493                 return;
1494         }
1495
1496         skb_reserve(skb, local->hw.extra_tx_headroom);
1497         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1498         memset(mgmt, 0, 24);
1499         memcpy(mgmt->da, da, ETH_ALEN);
1500         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1501         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1502                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1503         else
1504                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1505         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1506                                         IEEE80211_STYPE_ACTION);
1507
1508         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1509
1510         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1511         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1512         params = (u16)(initiator << 11);        /* bit 11 initiator */
1513         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1514
1515         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1516         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1517
1518         ieee80211_sta_tx(dev, skb, 0);
1519 }
1520
1521 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1522                                         u16 initiator, u16 reason)
1523 {
1524         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1525         struct ieee80211_hw *hw = &local->hw;
1526         struct sta_info *sta;
1527         int ret, i;
1528         DECLARE_MAC_BUF(mac);
1529
1530         rcu_read_lock();
1531
1532         sta = sta_info_get(local, ra);
1533         if (!sta) {
1534                 rcu_read_unlock();
1535                 return;
1536         }
1537
1538         /* check if TID is in operational state */
1539         spin_lock_bh(&sta->lock);
1540         if (sta->ampdu_mlme.tid_state_rx[tid]
1541                                 != HT_AGG_STATE_OPERATIONAL) {
1542                 spin_unlock_bh(&sta->lock);
1543                 rcu_read_unlock();
1544                 return;
1545         }
1546         sta->ampdu_mlme.tid_state_rx[tid] =
1547                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1548                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1549         spin_unlock_bh(&sta->lock);
1550
1551         /* stop HW Rx aggregation. ampdu_action existence
1552          * already verified in session init so we add the BUG_ON */
1553         BUG_ON(!local->ops->ampdu_action);
1554
1555 #ifdef CONFIG_MAC80211_HT_DEBUG
1556         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1557                                 print_mac(mac, ra), tid);
1558 #endif /* CONFIG_MAC80211_HT_DEBUG */
1559
1560         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1561                                         ra, tid, NULL);
1562         if (ret)
1563                 printk(KERN_DEBUG "HW problem - can not stop rx "
1564                                 "aggergation for tid %d\n", tid);
1565
1566         /* shutdown timer has not expired */
1567         if (initiator != WLAN_BACK_TIMER)
1568                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1569
1570         /* check if this is a self generated aggregation halt */
1571         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1572                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1573
1574         /* free the reordering buffer */
1575         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1576                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1577                         /* release the reordered frames */
1578                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1579                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1580                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1581                 }
1582         }
1583         /* free resources */
1584         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1585         kfree(sta->ampdu_mlme.tid_rx[tid]);
1586         sta->ampdu_mlme.tid_rx[tid] = NULL;
1587         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1588
1589         rcu_read_unlock();
1590 }
1591
1592
1593 static void ieee80211_sta_process_delba(struct net_device *dev,
1594                         struct ieee80211_mgmt *mgmt, size_t len)
1595 {
1596         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1597         struct sta_info *sta;
1598         u16 tid, params;
1599         u16 initiator;
1600         DECLARE_MAC_BUF(mac);
1601
1602         rcu_read_lock();
1603
1604         sta = sta_info_get(local, mgmt->sa);
1605         if (!sta) {
1606                 rcu_read_unlock();
1607                 return;
1608         }
1609
1610         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1611         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1612         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1613
1614 #ifdef CONFIG_MAC80211_HT_DEBUG
1615         if (net_ratelimit())
1616                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1617                         print_mac(mac, mgmt->sa),
1618                         initiator ? "initiator" : "recipient", tid,
1619                         mgmt->u.action.u.delba.reason_code);
1620 #endif /* CONFIG_MAC80211_HT_DEBUG */
1621
1622         if (initiator == WLAN_BACK_INITIATOR)
1623                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1624                                                  WLAN_BACK_INITIATOR, 0);
1625         else { /* WLAN_BACK_RECIPIENT */
1626                 spin_lock_bh(&sta->lock);
1627                 sta->ampdu_mlme.tid_state_tx[tid] =
1628                                 HT_AGG_STATE_OPERATIONAL;
1629                 spin_unlock_bh(&sta->lock);
1630                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1631                                              WLAN_BACK_RECIPIENT);
1632         }
1633         rcu_read_unlock();
1634 }
1635
1636 /*
1637  * After sending add Block Ack request we activated a timer until
1638  * add Block Ack response will arrive from the recipient.
1639  * If this timer expires sta_addba_resp_timer_expired will be executed.
1640  */
1641 void sta_addba_resp_timer_expired(unsigned long data)
1642 {
1643         /* not an elegant detour, but there is no choice as the timer passes
1644          * only one argument, and both sta_info and TID are needed, so init
1645          * flow in sta_info_create gives the TID as data, while the timer_to_id
1646          * array gives the sta through container_of */
1647         u16 tid = *(u8 *)data;
1648         struct sta_info *temp_sta = container_of((void *)data,
1649                 struct sta_info, timer_to_tid[tid]);
1650
1651         struct ieee80211_local *local = temp_sta->local;
1652         struct ieee80211_hw *hw = &local->hw;
1653         struct sta_info *sta;
1654         u8 *state;
1655
1656         rcu_read_lock();
1657
1658         sta = sta_info_get(local, temp_sta->addr);
1659         if (!sta) {
1660                 rcu_read_unlock();
1661                 return;
1662         }
1663
1664         state = &sta->ampdu_mlme.tid_state_tx[tid];
1665         /* check if the TID waits for addBA response */
1666         spin_lock_bh(&sta->lock);
1667         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1668                 spin_unlock_bh(&sta->lock);
1669                 *state = HT_AGG_STATE_IDLE;
1670                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1671                                 "expecting addBA response there", tid);
1672                 goto timer_expired_exit;
1673         }
1674
1675         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1676
1677         /* go through the state check in stop_BA_session */
1678         *state = HT_AGG_STATE_OPERATIONAL;
1679         spin_unlock_bh(&sta->lock);
1680         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1681                                      WLAN_BACK_INITIATOR);
1682
1683 timer_expired_exit:
1684         rcu_read_unlock();
1685 }
1686
1687 /*
1688  * After accepting the AddBA Request we activated a timer,
1689  * resetting it after each frame that arrives from the originator.
1690  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1691  */
1692 static void sta_rx_agg_session_timer_expired(unsigned long data)
1693 {
1694         /* not an elegant detour, but there is no choice as the timer passes
1695          * only one argument, and various sta_info are needed here, so init
1696          * flow in sta_info_create gives the TID as data, while the timer_to_id
1697          * array gives the sta through container_of */
1698         u8 *ptid = (u8 *)data;
1699         u8 *timer_to_id = ptid - *ptid;
1700         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1701                                          timer_to_tid[0]);
1702
1703         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1704         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1705                                          (u16)*ptid, WLAN_BACK_TIMER,
1706                                          WLAN_REASON_QSTA_TIMEOUT);
1707 }
1708
1709 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1710 {
1711         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1712         int i;
1713
1714         for (i = 0; i <  STA_TID_NUM; i++) {
1715                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1716                                              WLAN_BACK_INITIATOR);
1717                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1718                                                  WLAN_BACK_RECIPIENT,
1719                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1720         }
1721 }
1722
1723 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1724                                         struct ieee80211_msrment_ie *request_ie,
1725                                         const u8 *da, const u8 *bssid,
1726                                         u8 dialog_token)
1727 {
1728         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1729         struct sk_buff *skb;
1730         struct ieee80211_mgmt *msr_report;
1731
1732         skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1733                                 sizeof(struct ieee80211_msrment_ie));
1734
1735         if (!skb) {
1736                 printk(KERN_ERR "%s: failed to allocate buffer for "
1737                                 "measurement report frame\n", dev->name);
1738                 return;
1739         }
1740
1741         skb_reserve(skb, local->hw.extra_tx_headroom);
1742         msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1743         memset(msr_report, 0, 24);
1744         memcpy(msr_report->da, da, ETH_ALEN);
1745         memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1746         memcpy(msr_report->bssid, bssid, ETH_ALEN);
1747         msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1748                                                 IEEE80211_STYPE_ACTION);
1749
1750         skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1751         msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1752         msr_report->u.action.u.measurement.action_code =
1753                                 WLAN_ACTION_SPCT_MSR_RPRT;
1754         msr_report->u.action.u.measurement.dialog_token = dialog_token;
1755
1756         msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1757         msr_report->u.action.u.measurement.length =
1758                         sizeof(struct ieee80211_msrment_ie);
1759
1760         memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1761                 sizeof(struct ieee80211_msrment_ie));
1762         msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1763         msr_report->u.action.u.measurement.msr_elem.mode |=
1764                         IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1765         msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1766
1767         ieee80211_sta_tx(dev, skb, 0);
1768 }
1769
1770 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1771                                                 struct ieee80211_mgmt *mgmt,
1772                                                 size_t len)
1773 {
1774         /*
1775          * Ignoring measurement request is spec violation.
1776          * Mandatory measurements must be reported optional
1777          * measurements might be refused or reported incapable
1778          * For now just refuse
1779          * TODO: Answer basic measurement as unmeasured
1780          */
1781         ieee80211_send_refuse_measurement_request(dev,
1782                         &mgmt->u.action.u.measurement.msr_elem,
1783                         mgmt->sa, mgmt->bssid,
1784                         mgmt->u.action.u.measurement.dialog_token);
1785 }
1786
1787
1788 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1789                                    struct ieee80211_if_sta *ifsta,
1790                                    struct ieee80211_mgmt *mgmt,
1791                                    size_t len)
1792 {
1793         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1794         u16 auth_alg, auth_transaction, status_code;
1795         DECLARE_MAC_BUF(mac);
1796
1797         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1798             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1799                 printk(KERN_DEBUG "%s: authentication frame received from "
1800                        "%s, but not in authenticate state - ignored\n",
1801                        dev->name, print_mac(mac, mgmt->sa));
1802                 return;
1803         }
1804
1805         if (len < 24 + 6) {
1806                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1807                        "received from %s - ignored\n",
1808                        dev->name, len, print_mac(mac, mgmt->sa));
1809                 return;
1810         }
1811
1812         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1813             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1814                 printk(KERN_DEBUG "%s: authentication frame received from "
1815                        "unknown AP (SA=%s BSSID=%s) - "
1816                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1817                        print_mac(mac, mgmt->bssid));
1818                 return;
1819         }
1820
1821         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1822             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1823                 printk(KERN_DEBUG "%s: authentication frame received from "
1824                        "unknown BSSID (SA=%s BSSID=%s) - "
1825                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1826                        print_mac(mac, mgmt->bssid));
1827                 return;
1828         }
1829
1830         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1831         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1832         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1833
1834         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1835                "transaction=%d status=%d)\n",
1836                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1837                auth_transaction, status_code);
1838
1839         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1840                 /*
1841                  * IEEE 802.11 standard does not require authentication in IBSS
1842                  * networks and most implementations do not seem to use it.
1843                  * However, try to reply to authentication attempts if someone
1844                  * has actually implemented this.
1845                  */
1846                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1847                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1848                                "frame (alg=%d transaction=%d)\n",
1849                                dev->name, auth_alg, auth_transaction);
1850                         return;
1851                 }
1852                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1853         }
1854
1855         if (auth_alg != ifsta->auth_alg ||
1856             auth_transaction != ifsta->auth_transaction) {
1857                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1858                        "(alg=%d transaction=%d)\n",
1859                        dev->name, auth_alg, auth_transaction);
1860                 return;
1861         }
1862
1863         if (status_code != WLAN_STATUS_SUCCESS) {
1864                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1865                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1866                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1867                         u8 algs[3];
1868                         const int num_algs = ARRAY_SIZE(algs);
1869                         int i, pos;
1870                         algs[0] = algs[1] = algs[2] = 0xff;
1871                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1872                                 algs[0] = WLAN_AUTH_OPEN;
1873                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1874                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1875                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1876                                 algs[2] = WLAN_AUTH_LEAP;
1877                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1878                                 pos = 0;
1879                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1880                                 pos = 1;
1881                         else
1882                                 pos = 2;
1883                         for (i = 0; i < num_algs; i++) {
1884                                 pos++;
1885                                 if (pos >= num_algs)
1886                                         pos = 0;
1887                                 if (algs[pos] == ifsta->auth_alg ||
1888                                     algs[pos] == 0xff)
1889                                         continue;
1890                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1891                                     !ieee80211_sta_wep_configured(dev))
1892                                         continue;
1893                                 ifsta->auth_alg = algs[pos];
1894                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1895                                        "next try\n",
1896                                        dev->name, ifsta->auth_alg);
1897                                 break;
1898                         }
1899                 }
1900                 return;
1901         }
1902
1903         switch (ifsta->auth_alg) {
1904         case WLAN_AUTH_OPEN:
1905         case WLAN_AUTH_LEAP:
1906                 ieee80211_auth_completed(dev, ifsta);
1907                 break;
1908         case WLAN_AUTH_SHARED_KEY:
1909                 if (ifsta->auth_transaction == 4)
1910                         ieee80211_auth_completed(dev, ifsta);
1911                 else
1912                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1913                 break;
1914         }
1915 }
1916
1917
1918 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1919                                      struct ieee80211_if_sta *ifsta,
1920                                      struct ieee80211_mgmt *mgmt,
1921                                      size_t len)
1922 {
1923         u16 reason_code;
1924         DECLARE_MAC_BUF(mac);
1925
1926         if (len < 24 + 2) {
1927                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1928                        "received from %s - ignored\n",
1929                        dev->name, len, print_mac(mac, mgmt->sa));
1930                 return;
1931         }
1932
1933         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1934                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1935                        "unknown AP (SA=%s BSSID=%s) - "
1936                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1937                        print_mac(mac, mgmt->bssid));
1938                 return;
1939         }
1940
1941         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1942
1943         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1944                " (reason=%d)\n",
1945                dev->name, print_mac(mac, mgmt->sa), reason_code);
1946
1947         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1948                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1949
1950         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1951             ifsta->state == IEEE80211_ASSOCIATE ||
1952             ifsta->state == IEEE80211_ASSOCIATED) {
1953                 ifsta->state = IEEE80211_AUTHENTICATE;
1954                 mod_timer(&ifsta->timer, jiffies +
1955                                       IEEE80211_RETRY_AUTH_INTERVAL);
1956         }
1957
1958         ieee80211_set_disassoc(dev, ifsta, 1);
1959         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1960 }
1961
1962
1963 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1964                                        struct ieee80211_if_sta *ifsta,
1965                                        struct ieee80211_mgmt *mgmt,
1966                                        size_t len)
1967 {
1968         u16 reason_code;
1969         DECLARE_MAC_BUF(mac);
1970
1971         if (len < 24 + 2) {
1972                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1973                        "received from %s - ignored\n",
1974                        dev->name, len, print_mac(mac, mgmt->sa));
1975                 return;
1976         }
1977
1978         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1979                 printk(KERN_DEBUG "%s: disassociation frame received from "
1980                        "unknown AP (SA=%s BSSID=%s) - "
1981                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1982                        print_mac(mac, mgmt->bssid));
1983                 return;
1984         }
1985
1986         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1987
1988         printk(KERN_DEBUG "%s: RX disassociation from %s"
1989                " (reason=%d)\n",
1990                dev->name, print_mac(mac, mgmt->sa), reason_code);
1991
1992         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1993                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1994
1995         if (ifsta->state == IEEE80211_ASSOCIATED) {
1996                 ifsta->state = IEEE80211_ASSOCIATE;
1997                 mod_timer(&ifsta->timer, jiffies +
1998                                       IEEE80211_RETRY_AUTH_INTERVAL);
1999         }
2000
2001         ieee80211_set_disassoc(dev, ifsta, 0);
2002 }
2003
2004
2005 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2006                                          struct ieee80211_if_sta *ifsta,
2007                                          struct ieee80211_mgmt *mgmt,
2008                                          size_t len,
2009                                          int reassoc)
2010 {
2011         struct ieee80211_local *local = sdata->local;
2012         struct net_device *dev = sdata->dev;
2013         struct ieee80211_supported_band *sband;
2014         struct sta_info *sta;
2015         u64 rates, basic_rates;
2016         u16 capab_info, status_code, aid;
2017         struct ieee802_11_elems elems;
2018         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2019         u8 *pos;
2020         int i, j;
2021         DECLARE_MAC_BUF(mac);
2022         bool have_higher_than_11mbit = false;
2023
2024         /* AssocResp and ReassocResp have identical structure, so process both
2025          * of them in this function. */
2026
2027         if (ifsta->state != IEEE80211_ASSOCIATE) {
2028                 printk(KERN_DEBUG "%s: association frame received from "
2029                        "%s, but not in associate state - ignored\n",
2030                        dev->name, print_mac(mac, mgmt->sa));
2031                 return;
2032         }
2033
2034         if (len < 24 + 6) {
2035                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
2036                        "received from %s - ignored\n",
2037                        dev->name, len, print_mac(mac, mgmt->sa));
2038                 return;
2039         }
2040
2041         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
2042                 printk(KERN_DEBUG "%s: association frame received from "
2043                        "unknown AP (SA=%s BSSID=%s) - "
2044                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
2045                        print_mac(mac, mgmt->bssid));
2046                 return;
2047         }
2048
2049         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2050         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2051         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2052
2053         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2054                "status=%d aid=%d)\n",
2055                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2056                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2057
2058         if (status_code != WLAN_STATUS_SUCCESS) {
2059                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2060                        dev->name, status_code);
2061                 /* if this was a reassociation, ensure we try a "full"
2062                  * association next time. This works around some broken APs
2063                  * which do not correctly reject reassociation requests. */
2064                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2065                 return;
2066         }
2067
2068         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2069                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2070                        "set\n", dev->name, aid);
2071         aid &= ~(BIT(15) | BIT(14));
2072
2073         pos = mgmt->u.assoc_resp.variable;
2074         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2075
2076         if (!elems.supp_rates) {
2077                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2078                        dev->name);
2079                 return;
2080         }
2081
2082         printk(KERN_DEBUG "%s: associated\n", dev->name);
2083         ifsta->aid = aid;
2084         ifsta->ap_capab = capab_info;
2085
2086         kfree(ifsta->assocresp_ies);
2087         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2088         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2089         if (ifsta->assocresp_ies)
2090                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2091
2092         rcu_read_lock();
2093
2094         /* Add STA entry for the AP */
2095         sta = sta_info_get(local, ifsta->bssid);
2096         if (!sta) {
2097                 struct ieee80211_sta_bss *bss;
2098                 int err;
2099
2100                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2101                 if (!sta) {
2102                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2103                                " the AP\n", dev->name);
2104                         rcu_read_unlock();
2105                         return;
2106                 }
2107                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2108                                            local->hw.conf.channel->center_freq,
2109                                            ifsta->ssid, ifsta->ssid_len);
2110                 if (bss) {
2111                         sta->last_signal = bss->signal;
2112                         sta->last_qual = bss->qual;
2113                         sta->last_noise = bss->noise;
2114                         ieee80211_rx_bss_put(dev, bss);
2115                 }
2116
2117                 err = sta_info_insert(sta);
2118                 if (err) {
2119                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2120                                " the AP (error %d)\n", dev->name, err);
2121                         rcu_read_unlock();
2122                         return;
2123                 }
2124         }
2125
2126         /*
2127          * FIXME: Do we really need to update the sta_info's information here?
2128          *        We already know about the AP (we found it in our list) so it
2129          *        should already be filled with the right info, no?
2130          *        As is stands, all this is racy because typically we assume
2131          *        the information that is filled in here (except flags) doesn't
2132          *        change while a STA structure is alive. As such, it should move
2133          *        to between the sta_info_alloc() and sta_info_insert() above.
2134          */
2135
2136         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2137                            WLAN_STA_AUTHORIZED);
2138
2139         rates = 0;
2140         basic_rates = 0;
2141         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2142
2143         for (i = 0; i < elems.supp_rates_len; i++) {
2144                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2145
2146                 if (rate > 110)
2147                         have_higher_than_11mbit = true;
2148
2149                 for (j = 0; j < sband->n_bitrates; j++) {
2150                         if (sband->bitrates[j].bitrate == rate)
2151                                 rates |= BIT(j);
2152                         if (elems.supp_rates[i] & 0x80)
2153                                 basic_rates |= BIT(j);
2154                 }
2155         }
2156
2157         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2158                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2159
2160                 if (rate > 110)
2161                         have_higher_than_11mbit = true;
2162
2163                 for (j = 0; j < sband->n_bitrates; j++) {
2164                         if (sband->bitrates[j].bitrate == rate)
2165                                 rates |= BIT(j);
2166                         if (elems.ext_supp_rates[i] & 0x80)
2167                                 basic_rates |= BIT(j);
2168                 }
2169         }
2170
2171         sta->supp_rates[local->hw.conf.channel->band] = rates;
2172         sdata->basic_rates = basic_rates;
2173
2174         /* cf. IEEE 802.11 9.2.12 */
2175         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2176             have_higher_than_11mbit)
2177                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2178         else
2179                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2180
2181         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2182             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2183                 struct ieee80211_ht_bss_info bss_info;
2184                 ieee80211_ht_cap_ie_to_ht_info(
2185                                 (struct ieee80211_ht_cap *)
2186                                 elems.ht_cap_elem, &sta->ht_info);
2187                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2188                                 (struct ieee80211_ht_addt_info *)
2189                                 elems.ht_info_elem, &bss_info);
2190                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2191         }
2192
2193         rate_control_rate_init(sta, local);
2194
2195         if (elems.wmm_param) {
2196                 set_sta_flags(sta, WLAN_STA_WME);
2197                 rcu_read_unlock();
2198                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2199                                          elems.wmm_param_len);
2200         } else
2201                 rcu_read_unlock();
2202
2203         /* set AID and assoc capability,
2204          * ieee80211_set_associated() will tell the driver */
2205         bss_conf->aid = aid;
2206         bss_conf->assoc_capability = capab_info;
2207         ieee80211_set_associated(dev, ifsta, 1);
2208
2209         ieee80211_associated(dev, ifsta);
2210 }
2211
2212
2213 /* Caller must hold local->sta_bss_lock */
2214 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2215                                         struct ieee80211_sta_bss *bss)
2216 {
2217         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2218         u8 hash_idx;
2219
2220         if (bss_mesh_cfg(bss))
2221                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2222                                         bss_mesh_id_len(bss));
2223         else
2224                 hash_idx = STA_HASH(bss->bssid);
2225
2226         bss->hnext = local->sta_bss_hash[hash_idx];
2227         local->sta_bss_hash[hash_idx] = bss;
2228 }
2229
2230
2231 /* Caller must hold local->sta_bss_lock */
2232 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2233                                         struct ieee80211_sta_bss *bss)
2234 {
2235         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2236         struct ieee80211_sta_bss *b, *prev = NULL;
2237         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2238         while (b) {
2239                 if (b == bss) {
2240                         if (!prev)
2241                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2242                                         bss->hnext;
2243                         else
2244                                 prev->hnext = bss->hnext;
2245                         break;
2246                 }
2247                 prev = b;
2248                 b = b->hnext;
2249         }
2250 }
2251
2252
2253 static struct ieee80211_sta_bss *
2254 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2255                      u8 *ssid, u8 ssid_len)
2256 {
2257         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2258         struct ieee80211_sta_bss *bss;
2259
2260         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2261         if (!bss)
2262                 return NULL;
2263         atomic_inc(&bss->users);
2264         atomic_inc(&bss->users);
2265         memcpy(bss->bssid, bssid, ETH_ALEN);
2266         bss->freq = freq;
2267         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2268                 memcpy(bss->ssid, ssid, ssid_len);
2269                 bss->ssid_len = ssid_len;
2270         }
2271
2272         spin_lock_bh(&local->sta_bss_lock);
2273         /* TODO: order by RSSI? */
2274         list_add_tail(&bss->list, &local->sta_bss_list);
2275         __ieee80211_rx_bss_hash_add(dev, bss);
2276         spin_unlock_bh(&local->sta_bss_lock);
2277         return bss;
2278 }
2279
2280 static struct ieee80211_sta_bss *
2281 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2282                      u8 *ssid, u8 ssid_len)
2283 {
2284         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2285         struct ieee80211_sta_bss *bss;
2286
2287         spin_lock_bh(&local->sta_bss_lock);
2288         bss = local->sta_bss_hash[STA_HASH(bssid)];
2289         while (bss) {
2290                 if (!bss_mesh_cfg(bss) &&
2291                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2292                     bss->freq == freq &&
2293                     bss->ssid_len == ssid_len &&
2294                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2295                         atomic_inc(&bss->users);
2296                         break;
2297                 }
2298                 bss = bss->hnext;
2299         }
2300         spin_unlock_bh(&local->sta_bss_lock);
2301         return bss;
2302 }
2303
2304 #ifdef CONFIG_MAC80211_MESH
2305 static struct ieee80211_sta_bss *
2306 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2307                           u8 *mesh_cfg, int freq)
2308 {
2309         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2310         struct ieee80211_sta_bss *bss;
2311
2312         spin_lock_bh(&local->sta_bss_lock);
2313         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2314         while (bss) {
2315                 if (bss_mesh_cfg(bss) &&
2316                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2317                     bss->freq == freq &&
2318                     mesh_id_len == bss->mesh_id_len &&
2319                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2320                                                  mesh_id_len))) {
2321                         atomic_inc(&bss->users);
2322                         break;
2323                 }
2324                 bss = bss->hnext;
2325         }
2326         spin_unlock_bh(&local->sta_bss_lock);
2327         return bss;
2328 }
2329
2330 static struct ieee80211_sta_bss *
2331 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2332                           u8 *mesh_cfg, int mesh_config_len, int freq)
2333 {
2334         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2335         struct ieee80211_sta_bss *bss;
2336
2337         if (mesh_config_len != MESH_CFG_LEN)
2338                 return NULL;
2339
2340         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2341         if (!bss)
2342                 return NULL;
2343
2344         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2345         if (!bss->mesh_cfg) {
2346                 kfree(bss);
2347                 return NULL;
2348         }
2349
2350         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2351                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2352                 if (!bss->mesh_id) {
2353                         kfree(bss->mesh_cfg);
2354                         kfree(bss);
2355                         return NULL;
2356                 }
2357                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2358         }
2359
2360         atomic_inc(&bss->users);
2361         atomic_inc(&bss->users);
2362         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2363         bss->mesh_id_len = mesh_id_len;
2364         bss->freq = freq;
2365         spin_lock_bh(&local->sta_bss_lock);
2366         /* TODO: order by RSSI? */
2367         list_add_tail(&bss->list, &local->sta_bss_list);
2368         __ieee80211_rx_bss_hash_add(dev, bss);
2369         spin_unlock_bh(&local->sta_bss_lock);
2370         return bss;
2371 }
2372 #endif
2373
2374 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2375 {
2376         kfree(bss->wpa_ie);
2377         kfree(bss->rsn_ie);
2378         kfree(bss->wmm_ie);
2379         kfree(bss->ht_ie);
2380         kfree(bss->ht_add_ie);
2381         kfree(bss_mesh_id(bss));
2382         kfree(bss_mesh_cfg(bss));
2383         kfree(bss);
2384 }
2385
2386
2387 static void ieee80211_rx_bss_put(struct net_device *dev,
2388                                  struct ieee80211_sta_bss *bss)
2389 {
2390         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2391
2392         local_bh_disable();
2393         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2394                 local_bh_enable();
2395                 return;
2396         }
2397
2398         __ieee80211_rx_bss_hash_del(dev, bss);
2399         list_del(&bss->list);
2400         spin_unlock_bh(&local->sta_bss_lock);
2401         ieee80211_rx_bss_free(bss);
2402 }
2403
2404
2405 void ieee80211_rx_bss_list_init(struct net_device *dev)
2406 {
2407         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2408         spin_lock_init(&local->sta_bss_lock);
2409         INIT_LIST_HEAD(&local->sta_bss_list);
2410 }
2411
2412
2413 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2414 {
2415         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2416         struct ieee80211_sta_bss *bss, *tmp;
2417
2418         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2419                 ieee80211_rx_bss_put(dev, bss);
2420 }
2421
2422
2423 static int ieee80211_sta_join_ibss(struct net_device *dev,
2424                                    struct ieee80211_if_sta *ifsta,
2425                                    struct ieee80211_sta_bss *bss)
2426 {
2427         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2428         int res, rates, i, j;
2429         struct sk_buff *skb;
2430         struct ieee80211_mgmt *mgmt;
2431         struct ieee80211_tx_info *control;
2432         struct rate_selection ratesel;
2433         u8 *pos;
2434         struct ieee80211_sub_if_data *sdata;
2435         struct ieee80211_supported_band *sband;
2436         union iwreq_data wrqu;
2437
2438         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2439
2440         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2441
2442         /* Remove possible STA entries from other IBSS networks. */
2443         sta_info_flush_delayed(sdata);
2444
2445         if (local->ops->reset_tsf) {
2446                 /* Reset own TSF to allow time synchronization work. */
2447                 local->ops->reset_tsf(local_to_hw(local));
2448         }
2449         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2450         res = ieee80211_if_config(dev);
2451         if (res)
2452                 return res;
2453
2454         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2455
2456         sdata->drop_unencrypted = bss->capability &
2457                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2458
2459         res = ieee80211_set_freq(dev, bss->freq);
2460
2461         if (res)
2462                 return res;
2463
2464         /* Set beacon template */
2465         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2466         do {
2467                 if (!skb)
2468                         break;
2469
2470                 skb_reserve(skb, local->hw.extra_tx_headroom);
2471
2472                 mgmt = (struct ieee80211_mgmt *)
2473                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2474                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2475                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2476                                                    IEEE80211_STYPE_BEACON);
2477                 memset(mgmt->da, 0xff, ETH_ALEN);
2478                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2479                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2480                 mgmt->u.beacon.beacon_int =
2481                         cpu_to_le16(local->hw.conf.beacon_int);
2482                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2483
2484                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2485                 *pos++ = WLAN_EID_SSID;
2486                 *pos++ = ifsta->ssid_len;
2487                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2488
2489                 rates = bss->supp_rates_len;
2490                 if (rates > 8)
2491                         rates = 8;
2492                 pos = skb_put(skb, 2 + rates);
2493                 *pos++ = WLAN_EID_SUPP_RATES;
2494                 *pos++ = rates;
2495                 memcpy(pos, bss->supp_rates, rates);
2496
2497                 if (bss->band == IEEE80211_BAND_2GHZ) {
2498                         pos = skb_put(skb, 2 + 1);
2499                         *pos++ = WLAN_EID_DS_PARAMS;
2500                         *pos++ = 1;
2501                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2502                 }
2503
2504                 pos = skb_put(skb, 2 + 2);
2505                 *pos++ = WLAN_EID_IBSS_PARAMS;
2506                 *pos++ = 2;
2507                 /* FIX: set ATIM window based on scan results */
2508                 *pos++ = 0;
2509                 *pos++ = 0;
2510
2511                 if (bss->supp_rates_len > 8) {
2512                         rates = bss->supp_rates_len - 8;
2513                         pos = skb_put(skb, 2 + rates);
2514                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2515                         *pos++ = rates;
2516                         memcpy(pos, &bss->supp_rates[8], rates);
2517                 }
2518
2519                 control = IEEE80211_SKB_CB(skb);
2520
2521                 rate_control_get_rate(dev, sband, skb, &ratesel);
2522                 if (ratesel.rate_idx < 0) {
2523                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2524                                "for IBSS beacon\n", dev->name);
2525                         break;
2526                 }
2527                 control->control.vif = &sdata->vif;
2528                 control->tx_rate_idx = ratesel.rate_idx;
2529                 if (sdata->bss_conf.use_short_preamble &&
2530                     sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2531                         control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2532                 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2533                 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2534                 control->control.retry_limit = 1;
2535
2536                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2537                 if (ifsta->probe_resp) {
2538                         mgmt = (struct ieee80211_mgmt *)
2539                                 ifsta->probe_resp->data;
2540                         mgmt->frame_control =
2541                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2542                                              IEEE80211_STYPE_PROBE_RESP);
2543                 } else {
2544                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2545                                "template for IBSS\n", dev->name);
2546                 }
2547
2548                 if (local->ops->beacon_update &&
2549                     local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2550                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2551                                "template\n", dev->name);
2552                         skb = NULL;
2553                 }
2554
2555                 rates = 0;
2556                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2557                 for (i = 0; i < bss->supp_rates_len; i++) {
2558                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2559                         for (j = 0; j < sband->n_bitrates; j++)
2560                                 if (sband->bitrates[j].bitrate == bitrate)
2561                                         rates |= BIT(j);
2562                 }
2563                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2564
2565                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2566         } while (0);
2567
2568         if (skb) {
2569                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2570                        "template\n", dev->name);
2571                 dev_kfree_skb(skb);
2572         }
2573
2574         ifsta->state = IEEE80211_IBSS_JOINED;
2575         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2576
2577         memset(&wrqu, 0, sizeof(wrqu));
2578         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2579         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2580
2581         return res;
2582 }
2583
2584 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2585                             struct ieee802_11_elems *elems,
2586                             enum ieee80211_band band)
2587 {
2588         struct ieee80211_supported_band *sband;
2589         struct ieee80211_rate *bitrates;
2590         size_t num_rates;
2591         u64 supp_rates;
2592         int i, j;
2593         sband = local->hw.wiphy->bands[band];
2594
2595         if (!sband) {
2596                 WARN_ON(1);
2597                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2598         }
2599
2600         bitrates = sband->bitrates;
2601         num_rates = sband->n_bitrates;
2602         supp_rates = 0;
2603         for (i = 0; i < elems->supp_rates_len +
2604                      elems->ext_supp_rates_len; i++) {
2605                 u8 rate = 0;
2606                 int own_rate;
2607                 if (i < elems->supp_rates_len)
2608                         rate = elems->supp_rates[i];
2609                 else if (elems->ext_supp_rates)
2610                         rate = elems->ext_supp_rates
2611                                 [i - elems->supp_rates_len];
2612                 own_rate = 5 * (rate & 0x7f);
2613                 for (j = 0; j < num_rates; j++)
2614                         if (bitrates[j].bitrate == own_rate)
2615                                 supp_rates |= BIT(j);
2616         }
2617         return supp_rates;
2618 }
2619
2620
2621 static void ieee80211_rx_bss_info(struct net_device *dev,
2622                                   struct ieee80211_mgmt *mgmt,
2623                                   size_t len,
2624                                   struct ieee80211_rx_status *rx_status,
2625                                   int beacon)
2626 {
2627         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2628         struct ieee802_11_elems elems;
2629         size_t baselen;
2630         int freq, clen;
2631         struct ieee80211_sta_bss *bss;
2632         struct sta_info *sta;
2633         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2634         u64 beacon_timestamp, rx_timestamp;
2635         struct ieee80211_channel *channel;
2636         DECLARE_MAC_BUF(mac);
2637         DECLARE_MAC_BUF(mac2);
2638
2639         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2640                 return; /* ignore ProbeResp to foreign address */
2641
2642 #if 0
2643         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2644                dev->name, beacon ? "Beacon" : "Probe Response",
2645                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2646 #endif
2647
2648         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2649         if (baselen > len)
2650                 return;
2651
2652         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2653         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2654
2655         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2656             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2657                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2658                                                 rx_status->band);
2659
2660                 mesh_neighbour_update(mgmt->sa, rates, dev,
2661                                       mesh_peer_accepts_plinks(&elems, dev));
2662         }
2663
2664         rcu_read_lock();
2665
2666         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2667             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2668             (sta = sta_info_get(local, mgmt->sa))) {
2669                 u64 prev_rates;
2670                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2671                                                         rx_status->band);
2672
2673                 prev_rates = sta->supp_rates[rx_status->band];
2674                 sta->supp_rates[rx_status->band] &= supp_rates;
2675                 if (sta->supp_rates[rx_status->band] == 0) {
2676                         /* No matching rates - this should not really happen.
2677                          * Make sure that at least one rate is marked
2678                          * supported to avoid issues with TX rate ctrl. */
2679                         sta->supp_rates[rx_status->band] =
2680                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2681                 }
2682                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2683                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2684                                "%s based on beacon info (0x%llx & 0x%llx -> "
2685                                "0x%llx)\n",
2686                                dev->name, print_mac(mac, sta->addr),
2687                                (unsigned long long) prev_rates,
2688                                (unsigned long long) supp_rates,
2689                                (unsigned long long) sta->supp_rates[rx_status->band]);
2690                 }
2691         }
2692
2693         rcu_read_unlock();
2694
2695         if (elems.ds_params && elems.ds_params_len == 1)
2696                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2697         else
2698                 freq = rx_status->freq;
2699
2700         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2701
2702         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2703                 return;
2704
2705 #ifdef CONFIG_MAC80211_MESH
2706         if (elems.mesh_config)
2707                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2708                                 elems.mesh_id_len, elems.mesh_config, freq);
2709         else
2710 #endif
2711                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2712                                            elems.ssid, elems.ssid_len);
2713         if (!bss) {
2714 #ifdef CONFIG_MAC80211_MESH
2715                 if (elems.mesh_config)
2716                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2717                                 elems.mesh_id_len, elems.mesh_config,
2718                                 elems.mesh_config_len, freq);
2719                 else
2720 #endif
2721                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2722                                                    elems.ssid, elems.ssid_len);
2723                 if (!bss)
2724                         return;
2725         } else {
2726 #if 0
2727                 /* TODO: order by RSSI? */
2728                 spin_lock_bh(&local->sta_bss_lock);
2729                 list_move_tail(&bss->list, &local->sta_bss_list);
2730                 spin_unlock_bh(&local->sta_bss_lock);
2731 #endif
2732         }
2733
2734         /* save the ERP value so that it is available at association time */
2735         if (elems.erp_info && elems.erp_info_len >= 1) {
2736                 bss->erp_value = elems.erp_info[0];
2737                 bss->has_erp_value = 1;
2738         }
2739
2740         if (elems.ht_cap_elem &&
2741              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2742              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2743                 kfree(bss->ht_ie);
2744                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2745                 if (bss->ht_ie) {
2746                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2747                                 elems.ht_cap_elem_len + 2);
2748                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2749                 } else
2750                         bss->ht_ie_len = 0;
2751         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2752                 kfree(bss->ht_ie);
2753                 bss->ht_ie = NULL;
2754                 bss->ht_ie_len = 0;
2755         }
2756
2757         if (elems.ht_info_elem &&
2758              (!bss->ht_add_ie ||
2759              bss->ht_add_ie_len != elems.ht_info_elem_len ||
2760              memcmp(bss->ht_add_ie, elems.ht_info_elem,
2761                         elems.ht_info_elem_len))) {
2762                 kfree(bss->ht_add_ie);
2763                 bss->ht_add_ie =
2764                         kmalloc(elems.ht_info_elem_len + 2, GFP_ATOMIC);
2765                 if (bss->ht_add_ie) {
2766                         memcpy(bss->ht_add_ie, elems.ht_info_elem - 2,
2767                                 elems.ht_info_elem_len + 2);
2768                         bss->ht_add_ie_len = elems.ht_info_elem_len + 2;
2769                 } else
2770                         bss->ht_add_ie_len = 0;
2771         } else if (!elems.ht_info_elem && bss->ht_add_ie) {
2772                 kfree(bss->ht_add_ie);
2773                 bss->ht_add_ie = NULL;
2774                 bss->ht_add_ie_len = 0;
2775         }
2776
2777         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2778         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2779
2780         bss->supp_rates_len = 0;
2781         if (elems.supp_rates) {
2782                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2783                 if (clen > elems.supp_rates_len)
2784                         clen = elems.supp_rates_len;
2785                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2786                        clen);
2787                 bss->supp_rates_len += clen;
2788         }
2789         if (elems.ext_supp_rates) {
2790                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2791                 if (clen > elems.ext_supp_rates_len)
2792                         clen = elems.ext_supp_rates_len;
2793                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2794                        elems.ext_supp_rates, clen);
2795                 bss->supp_rates_len += clen;
2796         }
2797
2798         bss->band = rx_status->band;
2799
2800         bss->timestamp = beacon_timestamp;
2801         bss->last_update = jiffies;
2802         bss->signal = rx_status->signal;
2803         bss->noise = rx_status->noise;
2804         bss->qual = rx_status->qual;
2805         if (!beacon && !bss->probe_resp)
2806                 bss->probe_resp = true;
2807
2808         /*
2809          * In STA mode, the remaining parameters should not be overridden
2810          * by beacons because they're not necessarily accurate there.
2811          */
2812         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2813             bss->probe_resp && beacon) {
2814                 ieee80211_rx_bss_put(dev, bss);
2815                 return;
2816         }
2817
2818         if (elems.wpa &&
2819             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2820              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2821                 kfree(bss->wpa_ie);
2822                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2823                 if (bss->wpa_ie) {
2824                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2825                         bss->wpa_ie_len = elems.wpa_len + 2;
2826                 } else
2827                         bss->wpa_ie_len = 0;
2828         } else if (!elems.wpa && bss->wpa_ie) {
2829                 kfree(bss->wpa_ie);
2830                 bss->wpa_ie = NULL;
2831                 bss->wpa_ie_len = 0;
2832         }
2833
2834         if (elems.rsn &&
2835             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2836              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2837                 kfree(bss->rsn_ie);
2838                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2839                 if (bss->rsn_ie) {
2840                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2841                         bss->rsn_ie_len = elems.rsn_len + 2;
2842                 } else
2843                         bss->rsn_ie_len = 0;
2844         } else if (!elems.rsn && bss->rsn_ie) {
2845                 kfree(bss->rsn_ie);
2846                 bss->rsn_ie = NULL;
2847                 bss->rsn_ie_len = 0;
2848         }
2849
2850         /*
2851          * Cf.
2852          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2853          *
2854          * quoting:
2855          *
2856          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2857          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2858          * Alliance (September 1, 2004) is incorporated by reference herein.
2859          * The inclusion of the WMM Parameters in probe responses and
2860          * association responses is mandatory for WMM enabled networks. The
2861          * inclusion of the WMM Parameters in beacons, however, is optional.
2862          */
2863
2864         if (elems.wmm_param &&
2865             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2866              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2867                 kfree(bss->wmm_ie);
2868                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2869                 if (bss->wmm_ie) {
2870                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2871                                elems.wmm_param_len + 2);
2872                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2873                 } else
2874                         bss->wmm_ie_len = 0;
2875         } else if (elems.wmm_info &&
2876                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2877                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2878                  /* As for certain AP's Fifth bit is not set in WMM IE in
2879                   * beacon frames.So while parsing the beacon frame the
2880                   * wmm_info structure is used instead of wmm_param.
2881                   * wmm_info structure was never used to set bss->wmm_ie.
2882                   * This code fixes this problem by copying the WME
2883                   * information from wmm_info to bss->wmm_ie and enabling
2884                   * n-band association.
2885                   */
2886                 kfree(bss->wmm_ie);
2887                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2888                 if (bss->wmm_ie) {
2889                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2890                                elems.wmm_info_len + 2);
2891                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2892                 } else
2893                         bss->wmm_ie_len = 0;
2894         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2895                 kfree(bss->wmm_ie);
2896                 bss->wmm_ie = NULL;
2897                 bss->wmm_ie_len = 0;
2898         }
2899
2900         /* check if we need to merge IBSS */
2901         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2902             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2903             bss->capability & WLAN_CAPABILITY_IBSS &&
2904             bss->freq == local->oper_channel->center_freq &&
2905             elems.ssid_len == sdata->u.sta.ssid_len &&
2906             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2907                 if (rx_status->flag & RX_FLAG_TSFT) {
2908                         /* in order for correct IBSS merging we need mactime
2909                          *
2910                          * since mactime is defined as the time the first data
2911                          * symbol of the frame hits the PHY, and the timestamp
2912                          * of the beacon is defined as "the time that the data
2913                          * symbol containing the first bit of the timestamp is
2914                          * transmitted to the PHY plus the transmitting STA’s
2915                          * delays through its local PHY from the MAC-PHY
2916                          * interface to its interface with the WM"
2917                          * (802.11 11.1.2) - equals the time this bit arrives at
2918                          * the receiver - we have to take into account the
2919                          * offset between the two.
2920                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2921                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2922                          */
2923                         int rate = local->hw.wiphy->bands[rx_status->band]->
2924                                         bitrates[rx_status->rate_idx].bitrate;
2925                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2926                 } else if (local && local->ops && local->ops->get_tsf)
2927                         /* second best option: get current TSF */
2928                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2929                 else
2930                         /* can't merge without knowing the TSF */
2931                         rx_timestamp = -1LLU;
2932 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2933                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2934                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2935                        print_mac(mac, mgmt->sa),
2936                        print_mac(mac2, mgmt->bssid),
2937                        (unsigned long long)rx_timestamp,
2938                        (unsigned long long)beacon_timestamp,
2939                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2940                        jiffies);
2941 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2942                 if (beacon_timestamp > rx_timestamp) {
2943 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2944                         if (net_ratelimit())
2945 #endif
2946                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2947                                        "local TSF - IBSS merge with BSSID %s\n",
2948                                        dev->name, print_mac(mac, mgmt->bssid));
2949                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2950                         ieee80211_ibss_add_sta(dev, NULL,
2951                                                mgmt->bssid, mgmt->sa,
2952                                                BIT(rx_status->rate_idx));
2953                 }
2954         }
2955
2956         ieee80211_rx_bss_put(dev, bss);
2957 }
2958
2959
2960 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2961                                          struct ieee80211_mgmt *mgmt,
2962                                          size_t len,
2963                                          struct ieee80211_rx_status *rx_status)
2964 {
2965         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2966 }
2967
2968
2969 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2970                                      struct ieee80211_mgmt *mgmt,
2971                                      size_t len,
2972                                      struct ieee80211_rx_status *rx_status)
2973 {
2974         struct ieee80211_sub_if_data *sdata;
2975         struct ieee80211_if_sta *ifsta;
2976         size_t baselen;
2977         struct ieee802_11_elems elems;
2978         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2979         struct ieee80211_conf *conf = &local->hw.conf;
2980         u32 changed = 0;
2981
2982         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2983
2984         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2985         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2986                 return;
2987         ifsta = &sdata->u.sta;
2988
2989         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2990             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2991                 return;
2992
2993         /* Process beacon from the current BSS */
2994         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2995         if (baselen > len)
2996                 return;
2997
2998         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2999
3000         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
3001                                  elems.wmm_param_len);
3002
3003         /* Do not send changes to driver if we are scanning. This removes
3004          * requirement that driver's bss_info_changed function needs to be
3005          * atomic. */
3006         if (local->sta_sw_scanning || local->sta_hw_scanning)
3007                 return;
3008
3009         if (elems.erp_info && elems.erp_info_len >= 1)
3010                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
3011         else {
3012                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
3013                 changed |= ieee80211_handle_protect_preamb(sdata, false,
3014                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
3015         }
3016
3017         if (elems.ht_cap_elem && elems.ht_info_elem &&
3018             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
3019                 struct ieee80211_ht_bss_info bss_info;
3020
3021                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
3022                                 (struct ieee80211_ht_addt_info *)
3023                                 elems.ht_info_elem, &bss_info);
3024                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
3025                                                &bss_info);
3026         }
3027
3028         ieee80211_bss_info_change_notify(sdata, changed);
3029 }
3030
3031
3032 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
3033                                         struct ieee80211_if_sta *ifsta,
3034                                         struct ieee80211_mgmt *mgmt,
3035                                         size_t len,
3036                                         struct ieee80211_rx_status *rx_status)
3037 {
3038         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3039         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3040         int tx_last_beacon;
3041         struct sk_buff *skb;
3042         struct ieee80211_mgmt *resp;
3043         u8 *pos, *end;
3044         DECLARE_MAC_BUF(mac);
3045 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3046         DECLARE_MAC_BUF(mac2);
3047         DECLARE_MAC_BUF(mac3);
3048 #endif
3049
3050         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
3051             ifsta->state != IEEE80211_IBSS_JOINED ||
3052             len < 24 + 2 || !ifsta->probe_resp)
3053                 return;
3054
3055         if (local->ops->tx_last_beacon)
3056                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
3057         else
3058                 tx_last_beacon = 1;
3059
3060 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3061         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
3062                "%s (tx_last_beacon=%d)\n",
3063                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3064                print_mac(mac3, mgmt->bssid), tx_last_beacon);
3065 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3066
3067         if (!tx_last_beacon)
3068                 return;
3069
3070         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3071             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3072                 return;
3073
3074         end = ((u8 *) mgmt) + len;
3075         pos = mgmt->u.probe_req.variable;
3076         if (pos[0] != WLAN_EID_SSID ||
3077             pos + 2 + pos[1] > end) {
3078                 if (net_ratelimit()) {
3079                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3080                                "from %s\n",
3081                                dev->name, print_mac(mac, mgmt->sa));
3082                 }
3083                 return;
3084         }
3085         if (pos[1] != 0 &&
3086             (pos[1] != ifsta->ssid_len ||
3087              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3088                 /* Ignore ProbeReq for foreign SSID */
3089                 return;
3090         }
3091
3092         /* Reply with ProbeResp */
3093         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3094         if (!skb)
3095                 return;
3096
3097         resp = (struct ieee80211_mgmt *) skb->data;
3098         memcpy(resp->da, mgmt->sa, ETH_ALEN);
3099 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3100         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3101                dev->name, print_mac(mac, resp->da));
3102 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3103         ieee80211_sta_tx(dev, skb, 0);
3104 }
3105
3106 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3107                                      struct ieee80211_if_sta *ifsta,
3108                                      struct ieee80211_mgmt *mgmt,
3109                                      size_t len,
3110                                      struct ieee80211_rx_status *rx_status)
3111 {
3112         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3113         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3114
3115         if (len < IEEE80211_MIN_ACTION_SIZE)
3116                 return;
3117
3118         switch (mgmt->u.action.category) {
3119         case WLAN_CATEGORY_SPECTRUM_MGMT:
3120                 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3121                         break;
3122                 switch (mgmt->u.action.u.chan_switch.action_code) {
3123                 case WLAN_ACTION_SPCT_MSR_REQ:
3124                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3125                                    sizeof(mgmt->u.action.u.measurement)))
3126                                 break;
3127                         ieee80211_sta_process_measurement_req(dev, mgmt, len);
3128                         break;
3129                 }
3130                 break;
3131         case WLAN_CATEGORY_BACK:
3132                 switch (mgmt->u.action.u.addba_req.action_code) {
3133                 case WLAN_ACTION_ADDBA_REQ:
3134                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3135                                    sizeof(mgmt->u.action.u.addba_req)))
3136                                 break;
3137                         ieee80211_sta_process_addba_request(dev, mgmt, len);
3138                         break;
3139                 case WLAN_ACTION_ADDBA_RESP:
3140                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3141                                    sizeof(mgmt->u.action.u.addba_resp)))
3142                                 break;
3143                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
3144                         break;
3145                 case WLAN_ACTION_DELBA:
3146                         if (len < (IEEE80211_MIN_ACTION_SIZE +
3147                                    sizeof(mgmt->u.action.u.delba)))
3148                                 break;
3149                         ieee80211_sta_process_delba(dev, mgmt, len);
3150                         break;
3151                 default:
3152                         if (net_ratelimit())
3153                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3154                                         dev->name);
3155                         break;
3156                 }
3157                 break;
3158         case PLINK_CATEGORY:
3159                 if (ieee80211_vif_is_mesh(&sdata->vif))
3160                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3161                 break;
3162         case MESH_PATH_SEL_CATEGORY:
3163                 if (ieee80211_vif_is_mesh(&sdata->vif))
3164                         mesh_rx_path_sel_frame(dev, mgmt, len);
3165                 break;
3166         default:
3167                 if (net_ratelimit())
3168                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
3169                         "category=%d\n", dev->name, mgmt->u.action.category);
3170                 break;
3171         }
3172 }
3173
3174 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3175                            struct ieee80211_rx_status *rx_status)
3176 {
3177         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3178         struct ieee80211_sub_if_data *sdata;
3179         struct ieee80211_if_sta *ifsta;
3180         struct ieee80211_mgmt *mgmt;
3181         u16 fc;
3182
3183         if (skb->len < 24)
3184                 goto fail;
3185
3186         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3187         ifsta = &sdata->u.sta;
3188
3189         mgmt = (struct ieee80211_mgmt *) skb->data;
3190         fc = le16_to_cpu(mgmt->frame_control);
3191
3192         switch (fc & IEEE80211_FCTL_STYPE) {
3193         case IEEE80211_STYPE_PROBE_REQ:
3194         case IEEE80211_STYPE_PROBE_RESP:
3195         case IEEE80211_STYPE_BEACON:
3196         case IEEE80211_STYPE_ACTION:
3197                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3198         case IEEE80211_STYPE_AUTH:
3199         case IEEE80211_STYPE_ASSOC_RESP:
3200         case IEEE80211_STYPE_REASSOC_RESP:
3201         case IEEE80211_STYPE_DEAUTH:
3202         case IEEE80211_STYPE_DISASSOC:
3203                 skb_queue_tail(&ifsta->skb_queue, skb);
3204                 queue_work(local->hw.workqueue, &ifsta->work);
3205                 return;
3206         default:
3207                 printk(KERN_DEBUG "%s: received unknown management frame - "
3208                        "stype=%d\n", dev->name,
3209                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3210                 break;
3211         }
3212
3213  fail:
3214         kfree_skb(skb);
3215 }
3216
3217
3218 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3219                                          struct sk_buff *skb)
3220 {
3221         struct ieee80211_rx_status *rx_status;
3222         struct ieee80211_sub_if_data *sdata;
3223         struct ieee80211_if_sta *ifsta;
3224         struct ieee80211_mgmt *mgmt;
3225         u16 fc;
3226
3227         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3228         ifsta = &sdata->u.sta;
3229
3230         rx_status = (struct ieee80211_rx_status *) skb->cb;
3231         mgmt = (struct ieee80211_mgmt *) skb->data;
3232         fc = le16_to_cpu(mgmt->frame_control);
3233
3234         switch (fc & IEEE80211_FCTL_STYPE) {
3235         case IEEE80211_STYPE_PROBE_REQ:
3236                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3237                                             rx_status);
3238                 break;
3239         case IEEE80211_STYPE_PROBE_RESP:
3240                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3241                 break;
3242         case IEEE80211_STYPE_BEACON:
3243                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3244                 break;
3245         case IEEE80211_STYPE_AUTH:
3246                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3247                 break;
3248         case IEEE80211_STYPE_ASSOC_RESP:
3249                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3250                 break;
3251         case IEEE80211_STYPE_REASSOC_RESP:
3252                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3253                 break;
3254         case IEEE80211_STYPE_DEAUTH:
3255                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3256                 break;
3257         case IEEE80211_STYPE_DISASSOC:
3258                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3259                 break;
3260         case IEEE80211_STYPE_ACTION:
3261                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3262                 break;
3263         }
3264
3265         kfree_skb(skb);
3266 }
3267
3268
3269 ieee80211_rx_result
3270 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3271                       struct ieee80211_rx_status *rx_status)
3272 {
3273         struct ieee80211_mgmt *mgmt;
3274         __le16 fc;
3275
3276         if (skb->len < 2)
3277                 return RX_DROP_UNUSABLE;
3278
3279         mgmt = (struct ieee80211_mgmt *) skb->data;
3280         fc = mgmt->frame_control;
3281
3282         if (ieee80211_is_ctl(fc))
3283                 return RX_CONTINUE;
3284
3285         if (skb->len < 24)
3286                 return RX_DROP_MONITOR;
3287
3288         if (ieee80211_is_probe_resp(fc)) {
3289                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3290                 dev_kfree_skb(skb);
3291                 return RX_QUEUED;
3292         }
3293
3294         if (ieee80211_is_beacon(fc)) {
3295                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3296                 dev_kfree_skb(skb);
3297                 return RX_QUEUED;
3298         }
3299
3300         return RX_CONTINUE;
3301 }
3302
3303
3304 static int ieee80211_sta_active_ibss(struct net_device *dev)
3305 {
3306         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3307         int active = 0;
3308         struct sta_info *sta;
3309         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3310
3311         rcu_read_lock();
3312
3313         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3314                 if (sta->sdata == sdata &&
3315                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3316                                jiffies)) {
3317                         active++;
3318                         break;
3319                 }
3320         }
3321
3322         rcu_read_unlock();
3323
3324         return active;
3325 }
3326
3327
3328 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3329 {
3330         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3331         struct sta_info *sta, *tmp;
3332         LIST_HEAD(tmp_list);
3333         DECLARE_MAC_BUF(mac);
3334         unsigned long flags;
3335
3336         spin_lock_irqsave(&local->sta_lock, flags);
3337         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3338                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3339                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3340                                dev->name, print_mac(mac, sta->addr));
3341                         __sta_info_unlink(&sta);
3342                         if (sta)
3343                                 list_add(&sta->list, &tmp_list);
3344                 }
3345         spin_unlock_irqrestore(&local->sta_lock, flags);
3346
3347         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3348                 sta_info_destroy(sta);
3349 }
3350
3351
3352 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3353                                      struct ieee80211_if_sta *ifsta)
3354 {
3355         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3356
3357         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3358         if (ieee80211_sta_active_ibss(dev))
3359                 return;
3360
3361         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3362                "IBSS networks with same SSID (merge)\n", dev->name);
3363         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3364 }
3365
3366
3367 #ifdef CONFIG_MAC80211_MESH
3368 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3369                            struct ieee80211_if_sta *ifsta)
3370 {
3371         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3372         bool free_plinks;
3373
3374         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3375         mesh_path_expire(dev);
3376
3377         free_plinks = mesh_plink_availables(sdata);
3378         if (free_plinks != sdata->u.sta.accepting_plinks)
3379                 ieee80211_if_config_beacon(dev);
3380
3381         mod_timer(&ifsta->timer, jiffies +
3382                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3383 }
3384
3385
3386 void ieee80211_start_mesh(struct net_device *dev)
3387 {
3388         struct ieee80211_if_sta *ifsta;
3389         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3390         ifsta = &sdata->u.sta;
3391         ifsta->state = IEEE80211_MESH_UP;
3392         ieee80211_sta_timer((unsigned long)sdata);
3393 }
3394 #endif
3395
3396
3397 void ieee80211_sta_timer(unsigned long data)
3398 {
3399         struct ieee80211_sub_if_data *sdata =
3400                 (struct ieee80211_sub_if_data *) data;
3401         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3402         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3403
3404         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3405         queue_work(local->hw.workqueue, &ifsta->work);
3406 }
3407
3408 void ieee80211_sta_work(struct work_struct *work)
3409 {
3410         struct ieee80211_sub_if_data *sdata =
3411                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3412         struct net_device *dev = sdata->dev;
3413         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3414         struct ieee80211_if_sta *ifsta;
3415         struct sk_buff *skb;
3416
3417         if (!netif_running(dev))
3418                 return;
3419
3420         if (local->sta_sw_scanning || local->sta_hw_scanning)
3421                 return;
3422
3423         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3424             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3425             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3426                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3427                        "(type=%d)\n", dev->name, sdata->vif.type);
3428                 return;
3429         }
3430         ifsta = &sdata->u.sta;
3431
3432         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3433                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3434
3435 #ifdef CONFIG_MAC80211_MESH
3436         if (ifsta->preq_queue_len &&
3437             time_after(jiffies,
3438                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3439                 mesh_path_start_discovery(dev);
3440 #endif
3441
3442         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3443             ifsta->state != IEEE80211_ASSOCIATE &&
3444             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3445                 if (ifsta->scan_ssid_len)
3446                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3447                 else
3448                         ieee80211_sta_start_scan(dev, NULL, 0);
3449                 return;
3450         }
3451
3452         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3453                 if (ieee80211_sta_config_auth(dev, ifsta))
3454                         return;
3455                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3456         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3457                 return;
3458
3459         switch (ifsta->state) {
3460         case IEEE80211_DISABLED:
3461                 break;
3462         case IEEE80211_AUTHENTICATE:
3463                 ieee80211_authenticate(dev, ifsta);
3464                 break;
3465         case IEEE80211_ASSOCIATE:
3466                 ieee80211_associate(dev, ifsta);
3467                 break;
3468         case IEEE80211_ASSOCIATED:
3469                 ieee80211_associated(dev, ifsta);
3470                 break;
3471         case IEEE80211_IBSS_SEARCH:
3472                 ieee80211_sta_find_ibss(dev, ifsta);
3473                 break;
3474         case IEEE80211_IBSS_JOINED:
3475                 ieee80211_sta_merge_ibss(dev, ifsta);
3476                 break;
3477 #ifdef CONFIG_MAC80211_MESH
3478         case IEEE80211_MESH_UP:
3479                 ieee80211_mesh_housekeeping(dev, ifsta);
3480                 break;
3481 #endif
3482         default:
3483                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3484                        ifsta->state);
3485                 break;
3486         }
3487
3488         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3489                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3490                        "mixed-cell disabled - disassociate\n", dev->name);
3491
3492                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3493                 ieee80211_set_disassoc(dev, ifsta, 0);
3494         }
3495 }
3496
3497
3498 static void ieee80211_sta_reset_auth(struct net_device *dev,
3499                                      struct ieee80211_if_sta *ifsta)
3500 {
3501         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3502
3503         if (local->ops->reset_tsf) {
3504                 /* Reset own TSF to allow time synchronization work. */
3505                 local->ops->reset_tsf(local_to_hw(local));
3506         }
3507
3508         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3509
3510
3511         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3512                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3513         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3514                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3515         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3516                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3517         else
3518                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3519         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3520                ifsta->auth_alg);
3521         ifsta->auth_transaction = -1;
3522         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3523         ifsta->auth_tries = ifsta->assoc_tries = 0;
3524         netif_carrier_off(dev);
3525 }
3526
3527
3528 void ieee80211_sta_req_auth(struct net_device *dev,
3529                             struct ieee80211_if_sta *ifsta)
3530 {
3531         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3532         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3533
3534         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3535                 return;
3536
3537         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3538                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3539             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3540                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3541                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3542                 queue_work(local->hw.workqueue, &ifsta->work);
3543         }
3544 }
3545
3546 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3547                                     const char *ssid, int ssid_len)
3548 {
3549         int tmp, hidden_ssid;
3550
3551         if (ssid_len == ifsta->ssid_len &&
3552             !memcmp(ifsta->ssid, ssid, ssid_len))
3553                 return 1;
3554
3555         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3556                 return 0;
3557
3558         hidden_ssid = 1;
3559         tmp = ssid_len;
3560         while (tmp--) {
3561                 if (ssid[tmp] != '\0') {
3562                         hidden_ssid = 0;
3563                         break;
3564                 }
3565         }
3566
3567         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3568                 return 1;
3569
3570         if (ssid_len == 1 && ssid[0] == ' ')
3571                 return 1;
3572
3573         return 0;
3574 }
3575
3576 static int ieee80211_sta_config_auth(struct net_device *dev,
3577                                      struct ieee80211_if_sta *ifsta)
3578 {
3579         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3580         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3581         struct ieee80211_sta_bss *bss, *selected = NULL;
3582         int top_rssi = 0, freq;
3583
3584         spin_lock_bh(&local->sta_bss_lock);
3585         freq = local->oper_channel->center_freq;
3586         list_for_each_entry(bss, &local->sta_bss_list, list) {
3587                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3588                         continue;
3589
3590                 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3591                         IEEE80211_STA_AUTO_BSSID_SEL |
3592                         IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3593                     (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3594                      !!sdata->default_key))
3595                         continue;
3596
3597                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3598                     bss->freq != freq)
3599                         continue;
3600
3601                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3602                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3603                         continue;
3604
3605                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3606                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3607                         continue;
3608
3609                 if (!selected || top_rssi < bss->signal) {
3610                         selected = bss;
3611                         top_rssi = bss->signal;
3612                 }
3613         }
3614         if (selected)
3615                 atomic_inc(&selected->users);
3616         spin_unlock_bh(&local->sta_bss_lock);
3617
3618         if (selected) {
3619                 ieee80211_set_freq(dev, selected->freq);
3620                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3621                         ieee80211_sta_set_ssid(dev, selected->ssid,
3622                                                selected->ssid_len);
3623                 ieee80211_sta_set_bssid(dev, selected->bssid);
3624                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3625                 ieee80211_rx_bss_put(dev, selected);
3626                 ifsta->state = IEEE80211_AUTHENTICATE;
3627                 ieee80211_sta_reset_auth(dev, ifsta);
3628                 return 0;
3629         } else {
3630                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3631                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3632                                 ieee80211_sta_start_scan(dev, NULL, 0);
3633                         else
3634                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3635                                                          ifsta->ssid_len);
3636                         ifsta->state = IEEE80211_AUTHENTICATE;
3637                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3638                 } else
3639                         ifsta->state = IEEE80211_DISABLED;
3640         }
3641         return -1;
3642 }
3643
3644
3645 static int ieee80211_sta_create_ibss(struct net_device *dev,
3646                                      struct ieee80211_if_sta *ifsta)
3647 {
3648         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3649         struct ieee80211_sta_bss *bss;
3650         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3651         struct ieee80211_supported_band *sband;
3652         u8 bssid[ETH_ALEN], *pos;
3653         int i;
3654         int ret;
3655         DECLARE_MAC_BUF(mac);
3656
3657 #if 0
3658         /* Easier testing, use fixed BSSID. */
3659         memset(bssid, 0xfe, ETH_ALEN);
3660 #else
3661         /* Generate random, not broadcast, locally administered BSSID. Mix in
3662          * own MAC address to make sure that devices that do not have proper
3663          * random number generator get different BSSID. */
3664         get_random_bytes(bssid, ETH_ALEN);
3665         for (i = 0; i < ETH_ALEN; i++)
3666                 bssid[i] ^= dev->dev_addr[i];
3667         bssid[0] &= ~0x01;
3668         bssid[0] |= 0x02;
3669 #endif
3670
3671         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3672                dev->name, print_mac(mac, bssid));
3673
3674         bss = ieee80211_rx_bss_add(dev, bssid,
3675                                    local->hw.conf.channel->center_freq,
3676                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3677         if (!bss)
3678                 return -ENOMEM;
3679
3680         bss->band = local->hw.conf.channel->band;
3681         sband = local->hw.wiphy->bands[bss->band];
3682
3683         if (local->hw.conf.beacon_int == 0)
3684                 local->hw.conf.beacon_int = 100;
3685         bss->beacon_int = local->hw.conf.beacon_int;
3686         bss->last_update = jiffies;
3687         bss->capability = WLAN_CAPABILITY_IBSS;
3688
3689         if (sdata->default_key)
3690                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3691         else
3692                 sdata->drop_unencrypted = 0;
3693
3694         bss->supp_rates_len = sband->n_bitrates;
3695         pos = bss->supp_rates;
3696         for (i = 0; i < sband->n_bitrates; i++) {
3697                 int rate = sband->bitrates[i].bitrate;
3698                 *pos++ = (u8) (rate / 5);
3699         }
3700
3701         ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3702         ieee80211_rx_bss_put(dev, bss);
3703         return ret;
3704 }
3705
3706
3707 static int ieee80211_sta_find_ibss(struct net_device *dev,
3708                                    struct ieee80211_if_sta *ifsta)
3709 {
3710         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3711         struct ieee80211_sta_bss *bss;
3712         int found = 0;
3713         u8 bssid[ETH_ALEN];
3714         int active_ibss;
3715         DECLARE_MAC_BUF(mac);
3716         DECLARE_MAC_BUF(mac2);
3717
3718         if (ifsta->ssid_len == 0)
3719                 return -EINVAL;
3720
3721         active_ibss = ieee80211_sta_active_ibss(dev);
3722 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3723         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3724                dev->name, active_ibss);
3725 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3726         spin_lock_bh(&local->sta_bss_lock);
3727         list_for_each_entry(bss, &local->sta_bss_list, list) {
3728                 if (ifsta->ssid_len != bss->ssid_len ||
3729                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3730                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3731                         continue;
3732 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3733                 printk(KERN_DEBUG "   bssid=%s found\n",
3734                        print_mac(mac, bss->bssid));
3735 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3736                 memcpy(bssid, bss->bssid, ETH_ALEN);
3737                 found = 1;
3738                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3739                         break;
3740         }
3741         spin_unlock_bh(&local->sta_bss_lock);
3742
3743 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3744         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3745                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3746 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3747         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3748             (bss = ieee80211_rx_bss_get(dev, bssid,
3749                                         local->hw.conf.channel->center_freq,
3750                                         ifsta->ssid, ifsta->ssid_len))) {
3751                 int ret;
3752                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3753                        " based on configured SSID\n",
3754                        dev->name, print_mac(mac, bssid));
3755                 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3756                 ieee80211_rx_bss_put(dev, bss);
3757                 return ret;
3758         }
3759 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3760         printk(KERN_DEBUG "   did not try to join ibss\n");
3761 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3762
3763         /* Selected IBSS not found in current scan results - try to scan */
3764         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3765             !ieee80211_sta_active_ibss(dev)) {
3766                 mod_timer(&ifsta->timer, jiffies +
3767                                       IEEE80211_IBSS_MERGE_INTERVAL);
3768         } else if (time_after(jiffies, local->last_scan_completed +
3769                               IEEE80211_SCAN_INTERVAL)) {
3770                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3771                        "join\n", dev->name);
3772                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3773                                               ifsta->ssid_len);
3774         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3775                 int interval = IEEE80211_SCAN_INTERVAL;
3776
3777                 if (time_after(jiffies, ifsta->ibss_join_req +
3778                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3779                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3780                             (!(local->oper_channel->flags &
3781                                         IEEE80211_CHAN_NO_IBSS)))
3782                                 return ieee80211_sta_create_ibss(dev, ifsta);
3783                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3784                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3785                                        " %d MHz\n", dev->name,
3786                                        local->hw.conf.channel->center_freq);
3787                         }
3788
3789                         /* No IBSS found - decrease scan interval and continue
3790                          * scanning. */
3791                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3792                 }
3793
3794                 ifsta->state = IEEE80211_IBSS_SEARCH;
3795                 mod_timer(&ifsta->timer, jiffies + interval);
3796                 return 0;
3797         }
3798
3799         return 0;
3800 }
3801
3802
3803 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3804 {
3805         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3806         struct ieee80211_if_sta *ifsta;
3807
3808         if (len > IEEE80211_MAX_SSID_LEN)
3809                 return -EINVAL;
3810
3811         ifsta = &sdata->u.sta;
3812
3813         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3814                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3815         memcpy(ifsta->ssid, ssid, len);
3816         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3817         ifsta->ssid_len = len;
3818
3819         if (len)
3820                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3821         else
3822                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3823         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3824             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3825                 ifsta->ibss_join_req = jiffies;
3826                 ifsta->state = IEEE80211_IBSS_SEARCH;
3827                 return ieee80211_sta_find_ibss(dev, ifsta);
3828         }
3829         return 0;
3830 }
3831
3832
3833 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3834 {
3835         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3836         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3837         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3838         *len = ifsta->ssid_len;
3839         return 0;
3840 }
3841
3842
3843 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3844 {
3845         struct ieee80211_sub_if_data *sdata;
3846         struct ieee80211_if_sta *ifsta;
3847         int res;
3848
3849         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3850         ifsta = &sdata->u.sta;
3851
3852         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3853                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3854                 res = ieee80211_if_config(dev);
3855                 if (res) {
3856                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3857                                "the low-level driver\n", dev->name);
3858                         return res;
3859                 }
3860         }
3861
3862         if (is_valid_ether_addr(bssid))
3863                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3864         else
3865                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3866
3867         return 0;
3868 }
3869
3870
3871 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3872                                     struct ieee80211_sub_if_data *sdata,
3873                                     int powersave)
3874 {
3875         struct sk_buff *skb;
3876         struct ieee80211_hdr *nullfunc;
3877         __le16 fc;
3878
3879         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3880         if (!skb) {
3881                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3882                        "frame\n", sdata->dev->name);
3883                 return;
3884         }
3885         skb_reserve(skb, local->hw.extra_tx_headroom);
3886
3887         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3888         memset(nullfunc, 0, 24);
3889         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3890                          IEEE80211_FCTL_TODS);
3891         if (powersave)
3892                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3893         nullfunc->frame_control = fc;
3894         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3895         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3896         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3897
3898         ieee80211_sta_tx(sdata->dev, skb, 0);
3899 }
3900
3901
3902 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3903 {
3904         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3905             ieee80211_vif_is_mesh(&sdata->vif))
3906                 ieee80211_sta_timer((unsigned long)sdata);
3907 }
3908
3909 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3910 {
3911         struct ieee80211_local *local = hw_to_local(hw);
3912         struct net_device *dev = local->scan_dev;
3913         struct ieee80211_sub_if_data *sdata;
3914         union iwreq_data wrqu;
3915
3916         local->last_scan_completed = jiffies;
3917         memset(&wrqu, 0, sizeof(wrqu));
3918         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3919
3920         if (local->sta_hw_scanning) {
3921                 local->sta_hw_scanning = 0;
3922                 if (ieee80211_hw_config(local))
3923                         printk(KERN_DEBUG "%s: failed to restore operational "
3924                                "channel after scan\n", dev->name);
3925                 /* Restart STA timer for HW scan case */
3926                 rcu_read_lock();
3927                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3928                         ieee80211_restart_sta_timer(sdata);
3929                 rcu_read_unlock();
3930
3931                 goto done;
3932         }
3933
3934         local->sta_sw_scanning = 0;
3935         if (ieee80211_hw_config(local))
3936                 printk(KERN_DEBUG "%s: failed to restore operational "
3937                        "channel after scan\n", dev->name);
3938
3939
3940         netif_tx_lock_bh(local->mdev);
3941         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3942         local->ops->configure_filter(local_to_hw(local),
3943                                      FIF_BCN_PRBRESP_PROMISC,
3944                                      &local->filter_flags,
3945                                      local->mdev->mc_count,
3946                                      local->mdev->mc_list);
3947
3948         netif_tx_unlock_bh(local->mdev);
3949
3950         rcu_read_lock();
3951         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3952
3953                 /* No need to wake the master device. */
3954                 if (sdata->dev == local->mdev)
3955                         continue;
3956
3957                 /* Tell AP we're back */
3958                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3959                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3960                         ieee80211_send_nullfunc(local, sdata, 0);
3961
3962                 ieee80211_restart_sta_timer(sdata);
3963
3964                 netif_wake_queue(sdata->dev);
3965         }
3966         rcu_read_unlock();
3967
3968 done:
3969         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3970         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3971                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3972                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3973                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3974                     !ieee80211_sta_active_ibss(dev)))
3975                         ieee80211_sta_find_ibss(dev, ifsta);
3976         }
3977 }
3978 EXPORT_SYMBOL(ieee80211_scan_completed);
3979
3980 void ieee80211_sta_scan_work(struct work_struct *work)
3981 {
3982         struct ieee80211_local *local =
3983                 container_of(work, struct ieee80211_local, scan_work.work);
3984         struct net_device *dev = local->scan_dev;
3985         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3986         struct ieee80211_supported_band *sband;
3987         struct ieee80211_channel *chan;
3988         int skip;
3989         unsigned long next_delay = 0;
3990
3991         if (!local->sta_sw_scanning)
3992                 return;
3993
3994         switch (local->scan_state) {
3995         case SCAN_SET_CHANNEL:
3996                 /*
3997                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3998                  * after we successfully scanned the last channel of the last
3999                  * band (and the last band is supported by the hw)
4000                  */
4001                 if (local->scan_band < IEEE80211_NUM_BANDS)
4002                         sband = local->hw.wiphy->bands[local->scan_band];
4003                 else
4004                         sband = NULL;
4005
4006                 /*
4007                  * If we are at an unsupported band and have more bands
4008                  * left to scan, advance to the next supported one.
4009                  */
4010                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
4011                         local->scan_band++;
4012                         sband = local->hw.wiphy->bands[local->scan_band];
4013                         local->scan_channel_idx = 0;
4014                 }
4015
4016                 /* if no more bands/channels left, complete scan */
4017                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
4018                         ieee80211_scan_completed(local_to_hw(local));
4019                         return;
4020                 }
4021                 skip = 0;
4022                 chan = &sband->channels[local->scan_channel_idx];
4023
4024                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
4025                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
4026                      chan->flags & IEEE80211_CHAN_NO_IBSS))
4027                         skip = 1;
4028
4029                 if (!skip) {
4030                         local->scan_channel = chan;
4031                         if (ieee80211_hw_config(local)) {
4032                                 printk(KERN_DEBUG "%s: failed to set freq to "
4033                                        "%d MHz for scan\n", dev->name,
4034                                        chan->center_freq);
4035                                 skip = 1;
4036                         }
4037                 }
4038
4039                 /* advance state machine to next channel/band */
4040                 local->scan_channel_idx++;
4041                 if (local->scan_channel_idx >= sband->n_channels) {
4042                         /*
4043                          * scan_band may end up == IEEE80211_NUM_BANDS, but
4044                          * we'll catch that case above and complete the scan
4045                          * if that is the case.
4046                          */
4047                         local->scan_band++;
4048                         local->scan_channel_idx = 0;
4049                 }
4050
4051                 if (skip)
4052                         break;
4053
4054                 next_delay = IEEE80211_PROBE_DELAY +
4055                              usecs_to_jiffies(local->hw.channel_change_time);
4056                 local->scan_state = SCAN_SEND_PROBE;
4057                 break;
4058         case SCAN_SEND_PROBE:
4059                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
4060                 local->scan_state = SCAN_SET_CHANNEL;
4061
4062                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
4063                         break;
4064                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
4065                                          local->scan_ssid_len);
4066                 next_delay = IEEE80211_CHANNEL_TIME;
4067                 break;
4068         }
4069
4070         if (local->sta_sw_scanning)
4071                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4072                                    next_delay);
4073 }
4074
4075
4076 static int ieee80211_sta_start_scan(struct net_device *dev,
4077                                     u8 *ssid, size_t ssid_len)
4078 {
4079         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4080         struct ieee80211_sub_if_data *sdata;
4081
4082         if (ssid_len > IEEE80211_MAX_SSID_LEN)
4083                 return -EINVAL;
4084
4085         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
4086          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4087          * BSSID: MACAddress
4088          * SSID
4089          * ScanType: ACTIVE, PASSIVE
4090          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4091          *    a Probe frame during active scanning
4092          * ChannelList
4093          * MinChannelTime (>= ProbeDelay), in TU
4094          * MaxChannelTime: (>= MinChannelTime), in TU
4095          */
4096
4097          /* MLME-SCAN.confirm
4098           * BSSDescriptionSet
4099           * ResultCode: SUCCESS, INVALID_PARAMETERS
4100          */
4101
4102         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4103                 if (local->scan_dev == dev)
4104                         return 0;
4105                 return -EBUSY;
4106         }
4107
4108         if (local->ops->hw_scan) {
4109                 int rc = local->ops->hw_scan(local_to_hw(local),
4110                                              ssid, ssid_len);
4111                 if (!rc) {
4112                         local->sta_hw_scanning = 1;
4113                         local->scan_dev = dev;
4114                 }
4115                 return rc;
4116         }
4117
4118         local->sta_sw_scanning = 1;
4119
4120         rcu_read_lock();
4121         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4122
4123                 /* Don't stop the master interface, otherwise we can't transmit
4124                  * probes! */
4125                 if (sdata->dev == local->mdev)
4126                         continue;
4127
4128                 netif_stop_queue(sdata->dev);
4129                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4130                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4131                         ieee80211_send_nullfunc(local, sdata, 1);
4132         }
4133         rcu_read_unlock();
4134
4135         if (ssid) {
4136                 local->scan_ssid_len = ssid_len;
4137                 memcpy(local->scan_ssid, ssid, ssid_len);
4138         } else
4139                 local->scan_ssid_len = 0;
4140         local->scan_state = SCAN_SET_CHANNEL;
4141         local->scan_channel_idx = 0;
4142         local->scan_band = IEEE80211_BAND_2GHZ;
4143         local->scan_dev = dev;
4144
4145         netif_tx_lock_bh(local->mdev);
4146         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4147         local->ops->configure_filter(local_to_hw(local),
4148                                      FIF_BCN_PRBRESP_PROMISC,
4149                                      &local->filter_flags,
4150                                      local->mdev->mc_count,
4151                                      local->mdev->mc_list);
4152         netif_tx_unlock_bh(local->mdev);
4153
4154         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4155         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4156                            IEEE80211_CHANNEL_TIME);
4157
4158         return 0;
4159 }
4160
4161
4162 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4163 {
4164         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4165         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4166         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4167
4168         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4169                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4170
4171         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4172                 if (local->scan_dev == dev)
4173                         return 0;
4174                 return -EBUSY;
4175         }
4176
4177         ifsta->scan_ssid_len = ssid_len;
4178         if (ssid_len)
4179                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4180         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4181         queue_work(local->hw.workqueue, &ifsta->work);
4182         return 0;
4183 }
4184
4185 static char *
4186 ieee80211_sta_scan_result(struct net_device *dev,
4187                           struct iw_request_info *info,
4188                           struct ieee80211_sta_bss *bss,
4189                           char *current_ev, char *end_buf)
4190 {
4191         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4192         struct iw_event iwe;
4193
4194         if (time_after(jiffies,
4195                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4196                 return current_ev;
4197
4198         memset(&iwe, 0, sizeof(iwe));
4199         iwe.cmd = SIOCGIWAP;
4200         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4201         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4202         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4203                                           IW_EV_ADDR_LEN);
4204
4205         memset(&iwe, 0, sizeof(iwe));
4206         iwe.cmd = SIOCGIWESSID;
4207         if (bss_mesh_cfg(bss)) {
4208                 iwe.u.data.length = bss_mesh_id_len(bss);
4209                 iwe.u.data.flags = 1;
4210                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4211                                                   &iwe, bss_mesh_id(bss));
4212         } else {
4213                 iwe.u.data.length = bss->ssid_len;
4214                 iwe.u.data.flags = 1;
4215                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4216                                                   &iwe, bss->ssid);
4217         }
4218
4219         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4220             || bss_mesh_cfg(bss)) {
4221                 memset(&iwe, 0, sizeof(iwe));
4222                 iwe.cmd = SIOCGIWMODE;
4223                 if (bss_mesh_cfg(bss))
4224                         iwe.u.mode = IW_MODE_MESH;
4225                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4226                         iwe.u.mode = IW_MODE_MASTER;
4227                 else
4228                         iwe.u.mode = IW_MODE_ADHOC;
4229                 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4230                                                   &iwe, IW_EV_UINT_LEN);
4231         }
4232
4233         memset(&iwe, 0, sizeof(iwe));
4234         iwe.cmd = SIOCGIWFREQ;
4235         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4236         iwe.u.freq.e = 0;
4237         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4238                                           IW_EV_FREQ_LEN);
4239
4240         memset(&iwe, 0, sizeof(iwe));
4241         iwe.cmd = SIOCGIWFREQ;
4242         iwe.u.freq.m = bss->freq;
4243         iwe.u.freq.e = 6;
4244         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4245                                           IW_EV_FREQ_LEN);
4246         memset(&iwe, 0, sizeof(iwe));
4247         iwe.cmd = IWEVQUAL;
4248         iwe.u.qual.qual = bss->qual;
4249         iwe.u.qual.level = bss->signal;
4250         iwe.u.qual.noise = bss->noise;
4251         iwe.u.qual.updated = local->wstats_flags;
4252         current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4253                                           IW_EV_QUAL_LEN);
4254
4255         memset(&iwe, 0, sizeof(iwe));
4256         iwe.cmd = SIOCGIWENCODE;
4257         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4258                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4259         else
4260                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4261         iwe.u.data.length = 0;
4262         current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4263                                           &iwe, "");
4264
4265         if (bss && bss->wpa_ie) {
4266                 memset(&iwe, 0, sizeof(iwe));
4267                 iwe.cmd = IWEVGENIE;
4268                 iwe.u.data.length = bss->wpa_ie_len;
4269                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4270                                                   &iwe, bss->wpa_ie);
4271         }
4272
4273         if (bss && bss->rsn_ie) {
4274                 memset(&iwe, 0, sizeof(iwe));
4275                 iwe.cmd = IWEVGENIE;
4276                 iwe.u.data.length = bss->rsn_ie_len;
4277                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4278                                                   &iwe, bss->rsn_ie);
4279         }
4280
4281         if (bss && bss->ht_ie) {
4282                 memset(&iwe, 0, sizeof(iwe));
4283                 iwe.cmd = IWEVGENIE;
4284                 iwe.u.data.length = bss->ht_ie_len;
4285                 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4286                                                   &iwe, bss->ht_ie);
4287         }
4288
4289         if (bss && bss->supp_rates_len > 0) {
4290                 /* display all supported rates in readable format */
4291                 char *p = current_ev + iwe_stream_lcp_len(info);
4292                 int i;
4293
4294                 memset(&iwe, 0, sizeof(iwe));
4295                 iwe.cmd = SIOCGIWRATE;
4296                 /* Those two flags are ignored... */
4297                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4298
4299                 for (i = 0; i < bss->supp_rates_len; i++) {
4300                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4301                                                         0x7f) * 500000);
4302                         p = iwe_stream_add_value(info, current_ev, p,
4303                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4304                 }
4305                 current_ev = p;
4306         }
4307
4308         if (bss) {
4309                 char *buf;
4310                 buf = kmalloc(30, GFP_ATOMIC);
4311                 if (buf) {
4312                         memset(&iwe, 0, sizeof(iwe));
4313                         iwe.cmd = IWEVCUSTOM;
4314                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4315                         iwe.u.data.length = strlen(buf);
4316                         current_ev = iwe_stream_add_point(info, current_ev,
4317                                                           end_buf,
4318                                                           &iwe, buf);
4319                         kfree(buf);
4320                 }
4321         }
4322
4323         if (bss_mesh_cfg(bss)) {
4324                 char *buf;
4325                 u8 *cfg = bss_mesh_cfg(bss);
4326                 buf = kmalloc(50, GFP_ATOMIC);
4327                 if (buf) {
4328                         memset(&iwe, 0, sizeof(iwe));
4329                         iwe.cmd = IWEVCUSTOM;
4330                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4331                         iwe.u.data.length = strlen(buf);
4332                         current_ev = iwe_stream_add_point(info, current_ev,
4333                                                           end_buf,
4334                                                           &iwe, buf);
4335                         sprintf(buf, "Path Selection Protocol ID: "
4336                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4337                                                         cfg[4]);
4338                         iwe.u.data.length = strlen(buf);
4339                         current_ev = iwe_stream_add_point(info, current_ev,
4340                                                           end_buf,
4341                                                           &iwe, buf);
4342                         sprintf(buf, "Path Selection Metric ID: "
4343                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4344                                                         cfg[8]);
4345                         iwe.u.data.length = strlen(buf);
4346                         current_ev = iwe_stream_add_point(info, current_ev,
4347                                                           end_buf,
4348                                                           &iwe, buf);
4349                         sprintf(buf, "Congestion Control Mode ID: "
4350                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4351                                                         cfg[11], cfg[12]);
4352                         iwe.u.data.length = strlen(buf);
4353                         current_ev = iwe_stream_add_point(info, current_ev,
4354                                                           end_buf,
4355                                                           &iwe, buf);
4356                         sprintf(buf, "Channel Precedence: "
4357                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4358                                                         cfg[15], cfg[16]);
4359                         iwe.u.data.length = strlen(buf);
4360                         current_ev = iwe_stream_add_point(info, current_ev,
4361                                                           end_buf,
4362                                                           &iwe, buf);
4363                         kfree(buf);
4364                 }
4365         }
4366
4367         return current_ev;
4368 }
4369
4370
4371 int ieee80211_sta_scan_results(struct net_device *dev,
4372                                struct iw_request_info *info,
4373                                char *buf, size_t len)
4374 {
4375         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4376         char *current_ev = buf;
4377         char *end_buf = buf + len;
4378         struct ieee80211_sta_bss *bss;
4379
4380         spin_lock_bh(&local->sta_bss_lock);
4381         list_for_each_entry(bss, &local->sta_bss_list, list) {
4382                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4383                         spin_unlock_bh(&local->sta_bss_lock);
4384                         return -E2BIG;
4385                 }
4386                 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4387                                                        current_ev, end_buf);
4388         }
4389         spin_unlock_bh(&local->sta_bss_lock);
4390         return current_ev - buf;
4391 }
4392
4393
4394 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4395 {
4396         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4397         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4398
4399         kfree(ifsta->extra_ie);
4400         if (len == 0) {
4401                 ifsta->extra_ie = NULL;
4402                 ifsta->extra_ie_len = 0;
4403                 return 0;
4404         }
4405         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4406         if (!ifsta->extra_ie) {
4407                 ifsta->extra_ie_len = 0;
4408                 return -ENOMEM;
4409         }
4410         memcpy(ifsta->extra_ie, ie, len);
4411         ifsta->extra_ie_len = len;
4412         return 0;
4413 }
4414
4415
4416 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4417                                         struct sk_buff *skb, u8 *bssid,
4418                                         u8 *addr, u64 supp_rates)
4419 {
4420         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4421         struct sta_info *sta;
4422         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4423         DECLARE_MAC_BUF(mac);
4424         int band = local->hw.conf.channel->band;
4425
4426         /* TODO: Could consider removing the least recently used entry and
4427          * allow new one to be added. */
4428         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4429                 if (net_ratelimit()) {
4430                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4431                                "entry %s\n", dev->name, print_mac(mac, addr));
4432                 }
4433                 return NULL;
4434         }
4435
4436         if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4437                 return NULL;
4438
4439         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4440                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4441
4442         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4443         if (!sta)
4444                 return NULL;
4445
4446         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4447
4448         if (supp_rates)
4449                 sta->supp_rates[band] = supp_rates;
4450         else
4451                 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4452
4453         rate_control_rate_init(sta, local);
4454
4455         if (sta_info_insert(sta))
4456                 return NULL;
4457
4458         return sta;
4459 }
4460
4461
4462 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4463 {
4464         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4465         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4466
4467         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4468                dev->name, reason);
4469
4470         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4471             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4472                 return -EINVAL;
4473
4474         ieee80211_send_deauth(dev, ifsta, reason);
4475         ieee80211_set_disassoc(dev, ifsta, 1);
4476         return 0;
4477 }
4478
4479
4480 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4481 {
4482         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4483         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4484
4485         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4486                dev->name, reason);
4487
4488         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4489                 return -EINVAL;
4490
4491         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4492                 return -1;
4493
4494         ieee80211_send_disassoc(dev, ifsta, reason);
4495         ieee80211_set_disassoc(dev, ifsta, 0);
4496         return 0;
4497 }
4498
4499 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4500                           enum ieee80211_notification_types  notif_type)
4501 {
4502         struct ieee80211_local *local = hw_to_local(hw);
4503         struct ieee80211_sub_if_data *sdata;
4504
4505         switch (notif_type) {
4506         case IEEE80211_NOTIFY_RE_ASSOC:
4507                 rcu_read_lock();
4508                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4509
4510                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4511                                 ieee80211_sta_req_auth(sdata->dev,
4512                                                        &sdata->u.sta);
4513                         }
4514
4515                 }
4516                 rcu_read_unlock();
4517                 break;
4518         }
4519 }
4520 EXPORT_SYMBOL(ieee80211_notify_mac);