git.oblomov.eu Git - linux-2.6/blob - net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "rate.h"
  34 #include "led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 /* mgmt header + 1 byte action code */
  63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  64
  65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  70
  71 /* next values represent the buffer size for A-MPDU frame.
  72  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  73 #define IEEE80211_MIN_AMPDU_BUF 0x8
  74 #define IEEE80211_MAX_AMPDU_BUF 0x40
  75
  76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  77                                      u8 *ssid, size_t ssid_len);
  78 static struct ieee80211_sta_bss *
  79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  80                      u8 *ssid, u8 ssid_len);
  81 static void ieee80211_rx_bss_put(struct net_device *dev,
  82                                  struct ieee80211_sta_bss *bss);
  83 static int ieee80211_sta_find_ibss(struct net_device *dev,
  84                                    struct ieee80211_if_sta *ifsta);
  85 static int ieee80211_sta_wep_configured(struct net_device *dev);
  86 static int ieee80211_sta_start_scan(struct net_device *dev,
  87                                     u8 *ssid, size_t ssid_len);
  88 static int ieee80211_sta_config_auth(struct net_device *dev,
  89                                      struct ieee80211_if_sta *ifsta);
  90 static void sta_rx_agg_session_timer_expired(unsigned long data);
  91
  92
  93 void ieee802_11_parse_elems(u8 *start, size_t len,
  94                             struct ieee802_11_elems *elems)
  95 {
  96         size_t left = len;
  97         u8 *pos = start;
  98
  99         memset(elems, 0, sizeof(*elems));
 100
 101         while (left >= 2) {
 102                 u8 id, elen;
 103
 104                 id = *pos++;
 105                 elen = *pos++;
 106                 left -= 2;
 107
 108                 if (elen > left)
 109                         return;
 110
 111                 switch (id) {
 112                 case WLAN_EID_SSID:
 113                         elems->ssid = pos;
 114                         elems->ssid_len = elen;
 115                         break;
 116                 case WLAN_EID_SUPP_RATES:
 117                         elems->supp_rates = pos;
 118                         elems->supp_rates_len = elen;
 119                         break;
 120                 case WLAN_EID_FH_PARAMS:
 121                         elems->fh_params = pos;
 122                         elems->fh_params_len = elen;
 123                         break;
 124                 case WLAN_EID_DS_PARAMS:
 125                         elems->ds_params = pos;
 126                         elems->ds_params_len = elen;
 127                         break;
 128                 case WLAN_EID_CF_PARAMS:
 129                         elems->cf_params = pos;
 130                         elems->cf_params_len = elen;
 131                         break;
 132                 case WLAN_EID_TIM:
 133                         elems->tim = pos;
 134                         elems->tim_len = elen;
 135                         break;
 136                 case WLAN_EID_IBSS_PARAMS:
 137                         elems->ibss_params = pos;
 138                         elems->ibss_params_len = elen;
 139                         break;
 140                 case WLAN_EID_CHALLENGE:
 141                         elems->challenge = pos;
 142                         elems->challenge_len = elen;
 143                         break;
 144                 case WLAN_EID_WPA:
 145                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 146                             pos[2] == 0xf2) {
 147                                 /* Microsoft OUI (00:50:F2) */
 148                                 if (pos[3] == 1) {
 149                                         /* OUI Type 1 - WPA IE */
 150                                         elems->wpa = pos;
 151                                         elems->wpa_len = elen;
 152                                 } else if (elen >= 5 && pos[3] == 2) {
 153                                         if (pos[4] == 0) {
 154                                                 elems->wmm_info = pos;
 155                                                 elems->wmm_info_len = elen;
 156                                         } else if (pos[4] == 1) {
 157                                                 elems->wmm_param = pos;
 158                                                 elems->wmm_param_len = elen;
 159                                         }
 160                                 }
 161                         }
 162                         break;
 163                 case WLAN_EID_RSN:
 164                         elems->rsn = pos;
 165                         elems->rsn_len = elen;
 166                         break;
 167                 case WLAN_EID_ERP_INFO:
 168                         elems->erp_info = pos;
 169                         elems->erp_info_len = elen;
 170                         break;
 171                 case WLAN_EID_EXT_SUPP_RATES:
 172                         elems->ext_supp_rates = pos;
 173                         elems->ext_supp_rates_len = elen;
 174                         break;
 175                 case WLAN_EID_HT_CAPABILITY:
 176                         elems->ht_cap_elem = pos;
 177                         elems->ht_cap_elem_len = elen;
 178                         break;
 179                 case WLAN_EID_HT_EXTRA_INFO:
 180                         elems->ht_info_elem = pos;
 181                         elems->ht_info_elem_len = elen;
 182                         break;
 183                 case WLAN_EID_MESH_ID:
 184                         elems->mesh_id = pos;
 185                         elems->mesh_id_len = elen;
 186                         break;
 187                 case WLAN_EID_MESH_CONFIG:
 188                         elems->mesh_config = pos;
 189                         elems->mesh_config_len = elen;
 190                         break;
 191                 case WLAN_EID_PEER_LINK:
 192                         elems->peer_link = pos;
 193                         elems->peer_link_len = elen;
 194                         break;
 195                 case WLAN_EID_PREQ:
 196                         elems->preq = pos;
 197                         elems->preq_len = elen;
 198                         break;
 199                 case WLAN_EID_PREP:
 200                         elems->prep = pos;
 201                         elems->prep_len = elen;
 202                         break;
 203                 case WLAN_EID_PERR:
 204                         elems->perr = pos;
 205                         elems->perr_len = elen;
 206                         break;
 207                 default:
 208                         break;
 209                 }
 210
 211                 left -= elen;
 212                 pos += elen;
 213         }
 214 }
 215
 216
 217 static int ecw2cw(int ecw)
 218 {
 219         return (1 << ecw) - 1;
 220 }
 221
 222
 223 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 224                                          struct ieee80211_sta_bss *bss,
 225                                          int ibss)
 226 {
 227         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 228         struct ieee80211_local *local = sdata->local;
 229         int i, have_higher_than_11mbit = 0;
 230
 231
 232         /* cf. IEEE 802.11 9.2.12 */
 233         for (i = 0; i < bss->supp_rates_len; i++)
 234                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 235                         have_higher_than_11mbit = 1;
 236
 237         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 238             have_higher_than_11mbit)
 239                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 240         else
 241                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 242
 243
 244         if (local->ops->conf_tx) {
 245                 struct ieee80211_tx_queue_params qparam;
 246
 247                 memset(&qparam, 0, sizeof(qparam));
 248
 249                 qparam.aifs = 2;
 250
 251                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 252                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 253                         qparam.cw_min = 31;
 254                 else
 255                         qparam.cw_min = 15;
 256
 257                 qparam.cw_max = 1023;
 258                 qparam.txop = 0;
 259
 260                 for (i = 0; i < local_to_hw(local)->queues; i++)
 261                         local->ops->conf_tx(local_to_hw(local), i, &qparam);
 262         }
 263 }
 264
 265 static void ieee80211_sta_wmm_params(struct net_device *dev,
 266                                      struct ieee80211_if_sta *ifsta,
 267                                      u8 *wmm_param, size_t wmm_param_len)
 268 {
 269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 270         struct ieee80211_tx_queue_params params;
 271         size_t left;
 272         int count;
 273         u8 *pos;
 274
 275         if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
 276                 return;
 277
 278         if (!wmm_param)
 279                 return;
 280
 281         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 282                 return;
 283         count = wmm_param[6] & 0x0f;
 284         if (count == ifsta->wmm_last_param_set)
 285                 return;
 286         ifsta->wmm_last_param_set = count;
 287
 288         pos = wmm_param + 8;
 289         left = wmm_param_len - 8;
 290
 291         memset(&params, 0, sizeof(params));
 292
 293         if (!local->ops->conf_tx)
 294                 return;
 295
 296         local->wmm_acm = 0;
 297         for (; left >= 4; left -= 4, pos += 4) {
 298                 int aci = (pos[0] >> 5) & 0x03;
 299                 int acm = (pos[0] >> 4) & 0x01;
 300                 int queue;
 301
 302                 switch (aci) {
 303                 case 1:
 304                         queue = 3;
 305                         if (acm)
 306                                 local->wmm_acm |= BIT(0) | BIT(3);
 307                         break;
 308                 case 2:
 309                         queue = 1;
 310                         if (acm)
 311                                 local->wmm_acm |= BIT(4) | BIT(5);
 312                         break;
 313                 case 3:
 314                         queue = 0;
 315                         if (acm)
 316                                 local->wmm_acm |= BIT(6) | BIT(7);
 317                         break;
 318                 case 0:
 319                 default:
 320                         queue = 2;
 321                         if (acm)
 322                                 local->wmm_acm |= BIT(1) | BIT(2);
 323                         break;
 324                 }
 325
 326                 params.aifs = pos[0] & 0x0f;
 327                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 328                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 329                 params.txop = pos[2] | (pos[3] << 8);
 330 #ifdef CONFIG_MAC80211_DEBUG
 331                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 332                        "cWmin=%d cWmax=%d txop=%d\n",
 333                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 334                        params.cw_max, params.txop);
 335 #endif
 336                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 337                  * AC for now) */
 338                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 339                         printk(KERN_DEBUG "%s: failed to set TX queue "
 340                                "parameters for queue %d\n", dev->name, queue);
 341                 }
 342         }
 343 }
 344
 345 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
 346                                            bool use_protection,
 347                                            bool use_short_preamble)
 348 {
 349         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 350         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 351         DECLARE_MAC_BUF(mac);
 352         u32 changed = 0;
 353
 354         if (use_protection != bss_conf->use_cts_prot) {
 355                 if (net_ratelimit()) {
 356                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 357                                "%s)\n",
 358                                sdata->dev->name,
 359                                use_protection ? "enabled" : "disabled",
 360                                print_mac(mac, ifsta->bssid));
 361                 }
 362                 bss_conf->use_cts_prot = use_protection;
 363                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 364         }
 365
 366         if (use_short_preamble != bss_conf->use_short_preamble) {
 367                 if (net_ratelimit()) {
 368                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 369                                " (BSSID=%s)\n",
 370                                sdata->dev->name,
 371                                use_short_preamble ? "short" : "long",
 372                                print_mac(mac, ifsta->bssid));
 373                 }
 374                 bss_conf->use_short_preamble = use_short_preamble;
 375                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 376         }
 377
 378         return changed;
 379 }
 380
 381 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 382                                    u8 erp_value)
 383 {
 384         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 385         bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
 386
 387         return ieee80211_handle_protect_preamb(sdata,
 388                         use_protection, use_short_preamble);
 389 }
 390
 391 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 392                                            struct ieee80211_sta_bss *bss)
 393 {
 394         u32 changed = 0;
 395
 396         if (bss->has_erp_value)
 397                 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
 398         else {
 399                 u16 capab = bss->capability;
 400                 changed |= ieee80211_handle_protect_preamb(sdata, false,
 401                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
 402         }
 403
 404         return changed;
 405 }
 406
 407 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 408                                    struct ieee80211_ht_info *ht_info)
 409 {
 410
 411         if (ht_info == NULL)
 412                 return -EINVAL;
 413
 414         memset(ht_info, 0, sizeof(*ht_info));
 415
 416         if (ht_cap_ie) {
 417                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 418
 419                 ht_info->ht_supported = 1;
 420                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 421                 ht_info->ampdu_factor =
 422                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 423                 ht_info->ampdu_density =
 424                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 425                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 426         } else
 427                 ht_info->ht_supported = 0;
 428
 429         return 0;
 430 }
 431
 432 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 433                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 434                         struct ieee80211_ht_bss_info *bss_info)
 435 {
 436         if (bss_info == NULL)
 437                 return -EINVAL;
 438
 439         memset(bss_info, 0, sizeof(*bss_info));
 440
 441         if (ht_add_info_ie) {
 442                 u16 op_mode;
 443                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 444
 445                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 446                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 447                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 448         }
 449
 450         return 0;
 451 }
 452
 453 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 454                                          struct ieee80211_if_sta *ifsta)
 455 {
 456         char *buf;
 457         size_t len;
 458         int i;
 459         union iwreq_data wrqu;
 460
 461         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 462                 return;
 463
 464         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 465                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 466         if (!buf)
 467                 return;
 468
 469         len = sprintf(buf, "ASSOCINFO(");
 470         if (ifsta->assocreq_ies) {
 471                 len += sprintf(buf + len, "ReqIEs=");
 472                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 473                         len += sprintf(buf + len, "%02x",
 474                                        ifsta->assocreq_ies[i]);
 475                 }
 476         }
 477         if (ifsta->assocresp_ies) {
 478                 if (ifsta->assocreq_ies)
 479                         len += sprintf(buf + len, " ");
 480                 len += sprintf(buf + len, "RespIEs=");
 481                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 482                         len += sprintf(buf + len, "%02x",
 483                                        ifsta->assocresp_ies[i]);
 484                 }
 485         }
 486         len += sprintf(buf + len, ")");
 487
 488         if (len > IW_CUSTOM_MAX) {
 489                 len = sprintf(buf, "ASSOCRESPIE=");
 490                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 491                         len += sprintf(buf + len, "%02x",
 492                                        ifsta->assocresp_ies[i]);
 493                 }
 494         }
 495
 496         memset(&wrqu, 0, sizeof(wrqu));
 497         wrqu.data.length = len;
 498         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 499
 500         kfree(buf);
 501 }
 502
 503
 504 static void ieee80211_set_associated(struct net_device *dev,
 505                                      struct ieee80211_if_sta *ifsta,
 506                                      bool assoc)
 507 {
 508         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 509         struct ieee80211_local *local = sdata->local;
 510         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
 511         union iwreq_data wrqu;
 512         u32 changed = BSS_CHANGED_ASSOC;
 513
 514         if (assoc) {
 515                 struct ieee80211_sta_bss *bss;
 516
 517                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 518
 519                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 520                         return;
 521
 522                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 523                                            conf->channel->center_freq,
 524                                            ifsta->ssid, ifsta->ssid_len);
 525                 if (bss) {
 526                         /* set timing information */
 527                         sdata->bss_conf.beacon_int = bss->beacon_int;
 528                         sdata->bss_conf.timestamp = bss->timestamp;
 529
 530                         changed |= ieee80211_handle_bss_capability(sdata, bss);
 531
 532                         ieee80211_rx_bss_put(dev, bss);
 533                 }
 534
 535                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
 536                         changed |= BSS_CHANGED_HT;
 537                         sdata->bss_conf.assoc_ht = 1;
 538                         sdata->bss_conf.ht_conf = &conf->ht_conf;
 539                         sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
 540                 }
 541
 542                 netif_carrier_on(dev);
 543                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 544                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 545                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 546                 ieee80211_sta_send_associnfo(dev, ifsta);
 547         } else {
 548                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 549                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 550                 netif_carrier_off(dev);
 551                 ieee80211_reset_erp_info(dev);
 552
 553                 sdata->bss_conf.assoc_ht = 0;
 554                 sdata->bss_conf.ht_conf = NULL;
 555                 sdata->bss_conf.ht_bss_conf = NULL;
 556
 557                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 558         }
 559         ifsta->last_probe = jiffies;
 560         ieee80211_led_assoc(local, assoc);
 561
 562         sdata->bss_conf.assoc = assoc;
 563         ieee80211_bss_info_change_notify(sdata, changed);
 564         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 565         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 566 }
 567
 568 static void ieee80211_set_disassoc(struct net_device *dev,
 569                                    struct ieee80211_if_sta *ifsta, int deauth)
 570 {
 571         if (deauth)
 572                 ifsta->auth_tries = 0;
 573         ifsta->assoc_tries = 0;
 574         ieee80211_set_associated(dev, ifsta, 0);
 575 }
 576
 577 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 578                       int encrypt)
 579 {
 580         struct ieee80211_sub_if_data *sdata;
 581         struct ieee80211_tx_packet_data *pkt_data;
 582
 583         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 584         skb->dev = sdata->local->mdev;
 585         skb_set_mac_header(skb, 0);
 586         skb_set_network_header(skb, 0);
 587         skb_set_transport_header(skb, 0);
 588
 589         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 590         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 591         pkt_data->ifindex = sdata->dev->ifindex;
 592         if (!encrypt)
 593                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 594
 595         dev_queue_xmit(skb);
 596 }
 597
 598
 599 static void ieee80211_send_auth(struct net_device *dev,
 600                                 struct ieee80211_if_sta *ifsta,
 601                                 int transaction, u8 *extra, size_t extra_len,
 602                                 int encrypt)
 603 {
 604         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 605         struct sk_buff *skb;
 606         struct ieee80211_mgmt *mgmt;
 607
 608         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 609                             sizeof(*mgmt) + 6 + extra_len);
 610         if (!skb) {
 611                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 612                        "frame\n", dev->name);
 613                 return;
 614         }
 615         skb_reserve(skb, local->hw.extra_tx_headroom);
 616
 617         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 618         memset(mgmt, 0, 24 + 6);
 619         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 620                                            IEEE80211_STYPE_AUTH);
 621         if (encrypt)
 622                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 623         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 624         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 625         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 626         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 627         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 628         ifsta->auth_transaction = transaction + 1;
 629         mgmt->u.auth.status_code = cpu_to_le16(0);
 630         if (extra)
 631                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 632
 633         ieee80211_sta_tx(dev, skb, encrypt);
 634 }
 635
 636
 637 static void ieee80211_authenticate(struct net_device *dev,
 638                                    struct ieee80211_if_sta *ifsta)
 639 {
 640         DECLARE_MAC_BUF(mac);
 641
 642         ifsta->auth_tries++;
 643         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 644                 printk(KERN_DEBUG "%s: authentication with AP %s"
 645                        " timed out\n",
 646                        dev->name, print_mac(mac, ifsta->bssid));
 647                 ifsta->state = IEEE80211_DISABLED;
 648                 return;
 649         }
 650
 651         ifsta->state = IEEE80211_AUTHENTICATE;
 652         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 653                dev->name, print_mac(mac, ifsta->bssid));
 654
 655         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 656
 657         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 658 }
 659
 660 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
 661                                       struct ieee80211_supported_band *sband,
 662                                       u64 *rates)
 663 {
 664         int i, j, count;
 665         *rates = 0;
 666         count = 0;
 667         for (i = 0; i < bss->supp_rates_len; i++) {
 668                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
 669
 670                 for (j = 0; j < sband->n_bitrates; j++)
 671                         if (sband->bitrates[j].bitrate == rate) {
 672                                 *rates |= BIT(j);
 673                                 count++;
 674                                 break;
 675                         }
 676         }
 677
 678         return count;
 679 }
 680
 681 static void ieee80211_send_assoc(struct net_device *dev,
 682                                  struct ieee80211_if_sta *ifsta)
 683 {
 684         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 685         struct sk_buff *skb;
 686         struct ieee80211_mgmt *mgmt;
 687         u8 *pos, *ies;
 688         int i, len, count, rates_len, supp_rates_len;
 689         u16 capab;
 690         struct ieee80211_sta_bss *bss;
 691         int wmm = 0;
 692         struct ieee80211_supported_band *sband;
 693         u64 rates = 0;
 694
 695         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 696                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 697                             ifsta->ssid_len);
 698         if (!skb) {
 699                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 700                        "frame\n", dev->name);
 701                 return;
 702         }
 703         skb_reserve(skb, local->hw.extra_tx_headroom);
 704
 705         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 706
 707         capab = ifsta->capab;
 708
 709         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 710                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 711                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 712                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 713                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 714         }
 715
 716         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 717                                    local->hw.conf.channel->center_freq,
 718                                    ifsta->ssid, ifsta->ssid_len);
 719         if (bss) {
 720                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 721                         capab |= WLAN_CAPABILITY_PRIVACY;
 722                 if (bss->wmm_ie)
 723                         wmm = 1;
 724                 ieee80211_rx_bss_put(dev, bss);
 725         }
 726
 727         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 728         memset(mgmt, 0, 24);
 729         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 730         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 731         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 732
 733         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 734                 skb_put(skb, 10);
 735                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 736                                                    IEEE80211_STYPE_REASSOC_REQ);
 737                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 738                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 739                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 740                        ETH_ALEN);
 741         } else {
 742                 skb_put(skb, 4);
 743                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 744                                                    IEEE80211_STYPE_ASSOC_REQ);
 745                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 746                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 747         }
 748
 749         /* SSID */
 750         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 751         *pos++ = WLAN_EID_SSID;
 752         *pos++ = ifsta->ssid_len;
 753         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 754
 755         /* all supported rates should be added here but some APs
 756          * (e.g. D-Link DAP 1353 in b-only mode) don't like that
 757          * Therefore only add rates the AP supports */
 758         rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 759         supp_rates_len = rates_len;
 760         if (supp_rates_len > 8)
 761                 supp_rates_len = 8;
 762
 763         len = sband->n_bitrates;
 764         pos = skb_put(skb, supp_rates_len + 2);
 765         *pos++ = WLAN_EID_SUPP_RATES;
 766         *pos++ = supp_rates_len;
 767
 768         count = 0;
 769         for (i = 0; i < sband->n_bitrates; i++) {
 770                 if (BIT(i) & rates) {
 771                         int rate = sband->bitrates[i].bitrate;
 772                         *pos++ = (u8) (rate / 5);
 773                         if (++count == 8)
 774                                 break;
 775                 }
 776         }
 777
 778         if (count == 8) {
 779                 pos = skb_put(skb, rates_len - count + 2);
 780                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 781                 *pos++ = rates_len - count;
 782
 783                 for (i++; i < sband->n_bitrates; i++) {
 784                         if (BIT(i) & rates) {
 785                                 int rate = sband->bitrates[i].bitrate;
 786                                 *pos++ = (u8) (rate / 5);
 787                         }
 788                 }
 789         }
 790
 791         if (ifsta->extra_ie) {
 792                 pos = skb_put(skb, ifsta->extra_ie_len);
 793                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 794         }
 795
 796         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 797                 pos = skb_put(skb, 9);
 798                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 799                 *pos++ = 7; /* len */
 800                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 801                 *pos++ = 0x50;
 802                 *pos++ = 0xf2;
 803                 *pos++ = 2; /* WME */
 804                 *pos++ = 0; /* WME info */
 805                 *pos++ = 1; /* WME ver */
 806                 *pos++ = 0;
 807         }
 808
 809         /* wmm support is a must to HT */
 810         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
 811             sband->ht_info.ht_supported) {
 812                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 813                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 814                 *pos++ = WLAN_EID_HT_CAPABILITY;
 815                 *pos++ = sizeof(struct ieee80211_ht_cap);
 816                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 817                 memcpy(pos, &tmp, sizeof(u16));
 818                 pos += sizeof(u16);
 819                 /* TODO: needs a define here for << 2 */
 820                 *pos++ = sband->ht_info.ampdu_factor |
 821                          (sband->ht_info.ampdu_density << 2);
 822                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 823         }
 824
 825         kfree(ifsta->assocreq_ies);
 826         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 827         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 828         if (ifsta->assocreq_ies)
 829                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 830
 831         ieee80211_sta_tx(dev, skb, 0);
 832 }
 833
 834
 835 static void ieee80211_send_deauth(struct net_device *dev,
 836                                   struct ieee80211_if_sta *ifsta, u16 reason)
 837 {
 838         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 839         struct sk_buff *skb;
 840         struct ieee80211_mgmt *mgmt;
 841
 842         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 843         if (!skb) {
 844                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 845                        "frame\n", dev->name);
 846                 return;
 847         }
 848         skb_reserve(skb, local->hw.extra_tx_headroom);
 849
 850         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 851         memset(mgmt, 0, 24);
 852         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 853         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 854         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 855         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 856                                            IEEE80211_STYPE_DEAUTH);
 857         skb_put(skb, 2);
 858         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 859
 860         ieee80211_sta_tx(dev, skb, 0);
 861 }
 862
 863
 864 static void ieee80211_send_disassoc(struct net_device *dev,
 865                                     struct ieee80211_if_sta *ifsta, u16 reason)
 866 {
 867         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 868         struct sk_buff *skb;
 869         struct ieee80211_mgmt *mgmt;
 870
 871         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 872         if (!skb) {
 873                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 874                        "frame\n", dev->name);
 875                 return;
 876         }
 877         skb_reserve(skb, local->hw.extra_tx_headroom);
 878
 879         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 880         memset(mgmt, 0, 24);
 881         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 882         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 883         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 884         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 885                                            IEEE80211_STYPE_DISASSOC);
 886         skb_put(skb, 2);
 887         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 888
 889         ieee80211_sta_tx(dev, skb, 0);
 890 }
 891
 892
 893 static int ieee80211_privacy_mismatch(struct net_device *dev,
 894                                       struct ieee80211_if_sta *ifsta)
 895 {
 896         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 897         struct ieee80211_sta_bss *bss;
 898         int bss_privacy;
 899         int wep_privacy;
 900         int privacy_invoked;
 901
 902         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 903                 return 0;
 904
 905         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 906                                    local->hw.conf.channel->center_freq,
 907                                    ifsta->ssid, ifsta->ssid_len);
 908         if (!bss)
 909                 return 0;
 910
 911         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 912         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 913         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 914
 915         ieee80211_rx_bss_put(dev, bss);
 916
 917         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 918                 return 0;
 919
 920         return 1;
 921 }
 922
 923
 924 static void ieee80211_associate(struct net_device *dev,
 925                                 struct ieee80211_if_sta *ifsta)
 926 {
 927         DECLARE_MAC_BUF(mac);
 928
 929         ifsta->assoc_tries++;
 930         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 931                 printk(KERN_DEBUG "%s: association with AP %s"
 932                        " timed out\n",
 933                        dev->name, print_mac(mac, ifsta->bssid));
 934                 ifsta->state = IEEE80211_DISABLED;
 935                 return;
 936         }
 937
 938         ifsta->state = IEEE80211_ASSOCIATE;
 939         printk(KERN_DEBUG "%s: associate with AP %s\n",
 940                dev->name, print_mac(mac, ifsta->bssid));
 941         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 942                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 943                        "mixed-cell disabled - abort association\n", dev->name);
 944                 ifsta->state = IEEE80211_DISABLED;
 945                 return;
 946         }
 947
 948         ieee80211_send_assoc(dev, ifsta);
 949
 950         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 951 }
 952
 953
 954 static void ieee80211_associated(struct net_device *dev,
 955                                  struct ieee80211_if_sta *ifsta)
 956 {
 957         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 958         struct sta_info *sta;
 959         int disassoc;
 960         DECLARE_MAC_BUF(mac);
 961
 962         /* TODO: start monitoring current AP signal quality and number of
 963          * missed beacons. Scan other channels every now and then and search
 964          * for better APs. */
 965         /* TODO: remove expired BSSes */
 966
 967         ifsta->state = IEEE80211_ASSOCIATED;
 968
 969         rcu_read_lock();
 970
 971         sta = sta_info_get(local, ifsta->bssid);
 972         if (!sta) {
 973                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 974                        dev->name, print_mac(mac, ifsta->bssid));
 975                 disassoc = 1;
 976         } else {
 977                 disassoc = 0;
 978                 if (time_after(jiffies,
 979                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 980                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 981                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 982                                        "current AP %s - assume out of "
 983                                        "range\n",
 984                                        dev->name, print_mac(mac, ifsta->bssid));
 985                                 disassoc = 1;
 986                                 sta_info_unlink(&sta);
 987                         } else
 988                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 989                                                          local->scan_ssid,
 990                                                          local->scan_ssid_len);
 991                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 992                 } else {
 993                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 994                         if (time_after(jiffies, ifsta->last_probe +
 995                                        IEEE80211_PROBE_INTERVAL)) {
 996                                 ifsta->last_probe = jiffies;
 997                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 998                                                          ifsta->ssid,
 999                                                          ifsta->ssid_len);
1000                         }
1001                 }
1002         }
1003
1004         rcu_read_unlock();
1005
1006         if (disassoc && sta)
1007                 sta_info_destroy(sta);
1008
1009         if (disassoc) {
1010                 ifsta->state = IEEE80211_DISABLED;
1011                 ieee80211_set_associated(dev, ifsta, 0);
1012         } else {
1013                 mod_timer(&ifsta->timer, jiffies +
1014                                       IEEE80211_MONITORING_INTERVAL);
1015         }
1016 }
1017
1018
1019 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1020                                      u8 *ssid, size_t ssid_len)
1021 {
1022         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1023         struct ieee80211_supported_band *sband;
1024         struct sk_buff *skb;
1025         struct ieee80211_mgmt *mgmt;
1026         u8 *pos, *supp_rates, *esupp_rates = NULL;
1027         int i;
1028
1029         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1030         if (!skb) {
1031                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1032                        "request\n", dev->name);
1033                 return;
1034         }
1035         skb_reserve(skb, local->hw.extra_tx_headroom);
1036
1037         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1038         memset(mgmt, 0, 24);
1039         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1040                                            IEEE80211_STYPE_PROBE_REQ);
1041         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1042         if (dst) {
1043                 memcpy(mgmt->da, dst, ETH_ALEN);
1044                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1045         } else {
1046                 memset(mgmt->da, 0xff, ETH_ALEN);
1047                 memset(mgmt->bssid, 0xff, ETH_ALEN);
1048         }
1049         pos = skb_put(skb, 2 + ssid_len);
1050         *pos++ = WLAN_EID_SSID;
1051         *pos++ = ssid_len;
1052         memcpy(pos, ssid, ssid_len);
1053
1054         supp_rates = skb_put(skb, 2);
1055         supp_rates[0] = WLAN_EID_SUPP_RATES;
1056         supp_rates[1] = 0;
1057         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1058
1059         for (i = 0; i < sband->n_bitrates; i++) {
1060                 struct ieee80211_rate *rate = &sband->bitrates[i];
1061                 if (esupp_rates) {
1062                         pos = skb_put(skb, 1);
1063                         esupp_rates[1]++;
1064                 } else if (supp_rates[1] == 8) {
1065                         esupp_rates = skb_put(skb, 3);
1066                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1067                         esupp_rates[1] = 1;
1068                         pos = &esupp_rates[2];
1069                 } else {
1070                         pos = skb_put(skb, 1);
1071                         supp_rates[1]++;
1072                 }
1073                 *pos = rate->bitrate / 5;
1074         }
1075
1076         ieee80211_sta_tx(dev, skb, 0);
1077 }
1078
1079
1080 static int ieee80211_sta_wep_configured(struct net_device *dev)
1081 {
1082         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1083         if (!sdata || !sdata->default_key ||
1084             sdata->default_key->conf.alg != ALG_WEP)
1085                 return 0;
1086         return 1;
1087 }
1088
1089
1090 static void ieee80211_auth_completed(struct net_device *dev,
1091                                      struct ieee80211_if_sta *ifsta)
1092 {
1093         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1094         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1095         ieee80211_associate(dev, ifsta);
1096 }
1097
1098
1099 static void ieee80211_auth_challenge(struct net_device *dev,
1100                                      struct ieee80211_if_sta *ifsta,
1101                                      struct ieee80211_mgmt *mgmt,
1102                                      size_t len)
1103 {
1104         u8 *pos;
1105         struct ieee802_11_elems elems;
1106
1107         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1108         pos = mgmt->u.auth.variable;
1109         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1110         if (!elems.challenge) {
1111                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1112                        "frame\n", dev->name);
1113                 return;
1114         }
1115         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1116                             elems.challenge_len + 2, 1);
1117 }
1118
1119 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1120                                         u8 dialog_token, u16 status, u16 policy,
1121                                         u16 buf_size, u16 timeout)
1122 {
1123         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1124         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1125         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1126         struct sk_buff *skb;
1127         struct ieee80211_mgmt *mgmt;
1128         u16 capab;
1129
1130         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1131
1132         if (!skb) {
1133                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1134                        "for addba resp frame\n", dev->name);
1135                 return;
1136         }
1137
1138         skb_reserve(skb, local->hw.extra_tx_headroom);
1139         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1140         memset(mgmt, 0, 24);
1141         memcpy(mgmt->da, da, ETH_ALEN);
1142         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1143         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1144                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1145         else
1146                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1147         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1148                                            IEEE80211_STYPE_ACTION);
1149
1150         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1151         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1152         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1153         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1154
1155         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1156         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1157         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1158
1159         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1160         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1161         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1162
1163         ieee80211_sta_tx(dev, skb, 0);
1164
1165         return;
1166 }
1167
1168 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1169                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1170                                 u16 agg_size, u16 timeout)
1171 {
1172         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1173         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1174         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1175         struct sk_buff *skb;
1176         struct ieee80211_mgmt *mgmt;
1177         u16 capab;
1178
1179         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1180
1181         if (!skb) {
1182                 printk(KERN_ERR "%s: failed to allocate buffer "
1183                                 "for addba request frame\n", dev->name);
1184                 return;
1185         }
1186         skb_reserve(skb, local->hw.extra_tx_headroom);
1187         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1188         memset(mgmt, 0, 24);
1189         memcpy(mgmt->da, da, ETH_ALEN);
1190         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1191         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1192                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1193         else
1194                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1195
1196         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1197                                         IEEE80211_STYPE_ACTION);
1198
1199         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1200
1201         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1202         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1203
1204         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1205         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1206         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1207         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1208
1209         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1210
1211         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1212         mgmt->u.action.u.addba_req.start_seq_num =
1213                                         cpu_to_le16(start_seq_num << 4);
1214
1215         ieee80211_sta_tx(dev, skb, 0);
1216 }
1217
1218 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1219                                                 struct ieee80211_mgmt *mgmt,
1220                                                 size_t len)
1221 {
1222         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1223         struct ieee80211_hw *hw = &local->hw;
1224         struct ieee80211_conf *conf = &hw->conf;
1225         struct sta_info *sta;
1226         struct tid_ampdu_rx *tid_agg_rx;
1227         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1228         u8 dialog_token;
1229         int ret = -EOPNOTSUPP;
1230         DECLARE_MAC_BUF(mac);
1231
1232         rcu_read_lock();
1233
1234         sta = sta_info_get(local, mgmt->sa);
1235         if (!sta) {
1236                 rcu_read_unlock();
1237                 return;
1238         }
1239
1240         /* extract session parameters from addba request frame */
1241         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1242         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1243         start_seq_num =
1244                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1245
1246         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1247         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1248         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1249         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1250
1251         status = WLAN_STATUS_REQUEST_DECLINED;
1252
1253         /* sanity check for incoming parameters:
1254          * check if configuration can support the BA policy
1255          * and if buffer size does not exceeds max value */
1256         if (((ba_policy != 1)
1257                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1258                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1259                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1260 #ifdef CONFIG_MAC80211_HT_DEBUG
1261                 if (net_ratelimit())
1262                         printk(KERN_DEBUG "AddBA Req with bad params from "
1263                                 "%s on tid %u. policy %d, buffer size %d\n",
1264                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1265                                 buf_size);
1266 #endif /* CONFIG_MAC80211_HT_DEBUG */
1267                 goto end_no_lock;
1268         }
1269         /* determine default buffer size */
1270         if (buf_size == 0) {
1271                 struct ieee80211_supported_band *sband;
1272
1273                 sband = local->hw.wiphy->bands[conf->channel->band];
1274                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1275                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1276         }
1277
1278
1279         /* examine state machine */
1280         spin_lock_bh(&sta->lock);
1281
1282         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1283 #ifdef CONFIG_MAC80211_HT_DEBUG
1284                 if (net_ratelimit())
1285                         printk(KERN_DEBUG "unexpected AddBA Req from "
1286                                 "%s on tid %u\n",
1287                                 print_mac(mac, mgmt->sa), tid);
1288 #endif /* CONFIG_MAC80211_HT_DEBUG */
1289                 goto end;
1290         }
1291
1292         /* prepare A-MPDU MLME for Rx aggregation */
1293         sta->ampdu_mlme.tid_rx[tid] =
1294                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1295         if (!sta->ampdu_mlme.tid_rx[tid]) {
1296                 if (net_ratelimit())
1297                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1298                                         tid);
1299                 goto end;
1300         }
1301         /* rx timer */
1302         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1303                                 sta_rx_agg_session_timer_expired;
1304         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1305                                 (unsigned long)&sta->timer_to_tid[tid];
1306         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1307
1308         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1309
1310         /* prepare reordering buffer */
1311         tid_agg_rx->reorder_buf =
1312                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1313         if (!tid_agg_rx->reorder_buf) {
1314                 if (net_ratelimit())
1315                         printk(KERN_ERR "can not allocate reordering buffer "
1316                                "to tid %d\n", tid);
1317                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1318                 goto end;
1319         }
1320         memset(tid_agg_rx->reorder_buf, 0,
1321                 buf_size * sizeof(struct sk_buf *));
1322
1323         if (local->ops->ampdu_action)
1324                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1325                                                sta->addr, tid, &start_seq_num);
1326 #ifdef CONFIG_MAC80211_HT_DEBUG
1327         printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1328 #endif /* CONFIG_MAC80211_HT_DEBUG */
1329
1330         if (ret) {
1331                 kfree(tid_agg_rx->reorder_buf);
1332                 kfree(tid_agg_rx);
1333                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1334                 goto end;
1335         }
1336
1337         /* change state and send addba resp */
1338         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1339         tid_agg_rx->dialog_token = dialog_token;
1340         tid_agg_rx->ssn = start_seq_num;
1341         tid_agg_rx->head_seq_num = start_seq_num;
1342         tid_agg_rx->buf_size = buf_size;
1343         tid_agg_rx->timeout = timeout;
1344         tid_agg_rx->stored_mpdu_num = 0;
1345         status = WLAN_STATUS_SUCCESS;
1346 end:
1347         spin_unlock_bh(&sta->lock);
1348
1349 end_no_lock:
1350         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1351                                   dialog_token, status, 1, buf_size, timeout);
1352         rcu_read_unlock();
1353 }
1354
1355 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1356                                              struct ieee80211_mgmt *mgmt,
1357                                              size_t len)
1358 {
1359         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1360         struct ieee80211_hw *hw = &local->hw;
1361         struct sta_info *sta;
1362         u16 capab;
1363         u16 tid;
1364         u8 *state;
1365
1366         rcu_read_lock();
1367
1368         sta = sta_info_get(local, mgmt->sa);
1369         if (!sta) {
1370                 rcu_read_unlock();
1371                 return;
1372         }
1373
1374         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1375         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1376
1377         state = &sta->ampdu_mlme.tid_state_tx[tid];
1378
1379         spin_lock_bh(&sta->lock);
1380
1381         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1382                 spin_unlock_bh(&sta->lock);
1383                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1384                         "%d\n", *state);
1385                 goto addba_resp_exit;
1386         }
1387
1388         if (mgmt->u.action.u.addba_resp.dialog_token !=
1389                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1390                 spin_unlock_bh(&sta->lock);
1391 #ifdef CONFIG_MAC80211_HT_DEBUG
1392                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1393 #endif /* CONFIG_MAC80211_HT_DEBUG */
1394                 goto addba_resp_exit;
1395         }
1396
1397         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1398 #ifdef CONFIG_MAC80211_HT_DEBUG
1399         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1400 #endif /* CONFIG_MAC80211_HT_DEBUG */
1401         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1402                         == WLAN_STATUS_SUCCESS) {
1403                 if (*state & HT_ADDBA_RECEIVED_MSK)
1404                         printk(KERN_DEBUG "double addBA response\n");
1405
1406                 *state |= HT_ADDBA_RECEIVED_MSK;
1407                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1408
1409                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1410                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1411                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1412                 }
1413
1414                 spin_unlock_bh(&sta->lock);
1415                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1416         } else {
1417                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1418
1419                 sta->ampdu_mlme.addba_req_num[tid]++;
1420                 /* this will allow the state check in stop_BA_session */
1421                 *state = HT_AGG_STATE_OPERATIONAL;
1422                 spin_unlock_bh(&sta->lock);
1423                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1424                                              WLAN_BACK_INITIATOR);
1425         }
1426
1427 addba_resp_exit:
1428         rcu_read_unlock();
1429 }
1430
1431 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1432                           u16 initiator, u16 reason_code)
1433 {
1434         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1435         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1436         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1437         struct sk_buff *skb;
1438         struct ieee80211_mgmt *mgmt;
1439         u16 params;
1440
1441         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1442
1443         if (!skb) {
1444                 printk(KERN_ERR "%s: failed to allocate buffer "
1445                                         "for delba frame\n", dev->name);
1446                 return;
1447         }
1448
1449         skb_reserve(skb, local->hw.extra_tx_headroom);
1450         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1451         memset(mgmt, 0, 24);
1452         memcpy(mgmt->da, da, ETH_ALEN);
1453         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1454         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1455                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1456         else
1457                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1458         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1459                                         IEEE80211_STYPE_ACTION);
1460
1461         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1462
1463         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1464         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1465         params = (u16)(initiator << 11);        /* bit 11 initiator */
1466         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1467
1468         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1469         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1470
1471         ieee80211_sta_tx(dev, skb, 0);
1472 }
1473
1474 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1475                                         u16 initiator, u16 reason)
1476 {
1477         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1478         struct ieee80211_hw *hw = &local->hw;
1479         struct sta_info *sta;
1480         int ret, i;
1481         DECLARE_MAC_BUF(mac);
1482
1483         rcu_read_lock();
1484
1485         sta = sta_info_get(local, ra);
1486         if (!sta) {
1487                 rcu_read_unlock();
1488                 return;
1489         }
1490
1491         /* check if TID is in operational state */
1492         spin_lock_bh(&sta->lock);
1493         if (sta->ampdu_mlme.tid_state_rx[tid]
1494                                 != HT_AGG_STATE_OPERATIONAL) {
1495                 spin_unlock_bh(&sta->lock);
1496                 rcu_read_unlock();
1497                 return;
1498         }
1499         sta->ampdu_mlme.tid_state_rx[tid] =
1500                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1501                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1502         spin_unlock_bh(&sta->lock);
1503
1504         /* stop HW Rx aggregation. ampdu_action existence
1505          * already verified in session init so we add the BUG_ON */
1506         BUG_ON(!local->ops->ampdu_action);
1507
1508 #ifdef CONFIG_MAC80211_HT_DEBUG
1509         printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1510                                 print_mac(mac, ra), tid);
1511 #endif /* CONFIG_MAC80211_HT_DEBUG */
1512
1513         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1514                                         ra, tid, NULL);
1515         if (ret)
1516                 printk(KERN_DEBUG "HW problem - can not stop rx "
1517                                 "aggergation for tid %d\n", tid);
1518
1519         /* shutdown timer has not expired */
1520         if (initiator != WLAN_BACK_TIMER)
1521                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1522
1523         /* check if this is a self generated aggregation halt */
1524         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1525                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1526
1527         /* free the reordering buffer */
1528         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1529                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1530                         /* release the reordered frames */
1531                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1532                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1533                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1534                 }
1535         }
1536         /* free resources */
1537         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1538         kfree(sta->ampdu_mlme.tid_rx[tid]);
1539         sta->ampdu_mlme.tid_rx[tid] = NULL;
1540         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1541
1542         rcu_read_unlock();
1543 }
1544
1545
1546 static void ieee80211_sta_process_delba(struct net_device *dev,
1547                         struct ieee80211_mgmt *mgmt, size_t len)
1548 {
1549         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1550         struct sta_info *sta;
1551         u16 tid, params;
1552         u16 initiator;
1553         DECLARE_MAC_BUF(mac);
1554
1555         rcu_read_lock();
1556
1557         sta = sta_info_get(local, mgmt->sa);
1558         if (!sta) {
1559                 rcu_read_unlock();
1560                 return;
1561         }
1562
1563         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1564         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1565         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1566
1567 #ifdef CONFIG_MAC80211_HT_DEBUG
1568         if (net_ratelimit())
1569                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1570                         print_mac(mac, mgmt->sa),
1571                         initiator ? "initiator" : "recipient", tid,
1572                         mgmt->u.action.u.delba.reason_code);
1573 #endif /* CONFIG_MAC80211_HT_DEBUG */
1574
1575         if (initiator == WLAN_BACK_INITIATOR)
1576                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1577                                                  WLAN_BACK_INITIATOR, 0);
1578         else { /* WLAN_BACK_RECIPIENT */
1579                 spin_lock_bh(&sta->lock);
1580                 sta->ampdu_mlme.tid_state_tx[tid] =
1581                                 HT_AGG_STATE_OPERATIONAL;
1582                 spin_unlock_bh(&sta->lock);
1583                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1584                                              WLAN_BACK_RECIPIENT);
1585         }
1586         rcu_read_unlock();
1587 }
1588
1589 /*
1590  * After sending add Block Ack request we activated a timer until
1591  * add Block Ack response will arrive from the recipient.
1592  * If this timer expires sta_addba_resp_timer_expired will be executed.
1593  */
1594 void sta_addba_resp_timer_expired(unsigned long data)
1595 {
1596         /* not an elegant detour, but there is no choice as the timer passes
1597          * only one argument, and both sta_info and TID are needed, so init
1598          * flow in sta_info_create gives the TID as data, while the timer_to_id
1599          * array gives the sta through container_of */
1600         u16 tid = *(int *)data;
1601         struct sta_info *temp_sta = container_of((void *)data,
1602                 struct sta_info, timer_to_tid[tid]);
1603
1604         struct ieee80211_local *local = temp_sta->local;
1605         struct ieee80211_hw *hw = &local->hw;
1606         struct sta_info *sta;
1607         u8 *state;
1608
1609         rcu_read_lock();
1610
1611         sta = sta_info_get(local, temp_sta->addr);
1612         if (!sta) {
1613                 rcu_read_unlock();
1614                 return;
1615         }
1616
1617         state = &sta->ampdu_mlme.tid_state_tx[tid];
1618         /* check if the TID waits for addBA response */
1619         spin_lock_bh(&sta->lock);
1620         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1621                 spin_unlock_bh(&sta->lock);
1622                 *state = HT_AGG_STATE_IDLE;
1623                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1624                                 "expecting addBA response there", tid);
1625                 goto timer_expired_exit;
1626         }
1627
1628         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1629
1630         /* go through the state check in stop_BA_session */
1631         *state = HT_AGG_STATE_OPERATIONAL;
1632         spin_unlock_bh(&sta->lock);
1633         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1634                                      WLAN_BACK_INITIATOR);
1635
1636 timer_expired_exit:
1637         rcu_read_unlock();
1638 }
1639
1640 /*
1641  * After accepting the AddBA Request we activated a timer,
1642  * resetting it after each frame that arrives from the originator.
1643  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1644  */
1645 static void sta_rx_agg_session_timer_expired(unsigned long data)
1646 {
1647         /* not an elegant detour, but there is no choice as the timer passes
1648          * only one argument, and verious sta_info are needed here, so init
1649          * flow in sta_info_create gives the TID as data, while the timer_to_id
1650          * array gives the sta through container_of */
1651         u8 *ptid = (u8 *)data;
1652         u8 *timer_to_id = ptid - *ptid;
1653         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1654                                          timer_to_tid[0]);
1655
1656         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1657         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1658                                          (u16)*ptid, WLAN_BACK_TIMER,
1659                                          WLAN_REASON_QSTA_TIMEOUT);
1660 }
1661
1662 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1663 {
1664         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1665         int i;
1666
1667         for (i = 0; i <  STA_TID_NUM; i++) {
1668                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1669                                              WLAN_BACK_INITIATOR);
1670                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1671                                                  WLAN_BACK_RECIPIENT,
1672                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1673         }
1674 }
1675
1676 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1677                                    struct ieee80211_if_sta *ifsta,
1678                                    struct ieee80211_mgmt *mgmt,
1679                                    size_t len)
1680 {
1681         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1682         u16 auth_alg, auth_transaction, status_code;
1683         DECLARE_MAC_BUF(mac);
1684
1685         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1686             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1687                 printk(KERN_DEBUG "%s: authentication frame received from "
1688                        "%s, but not in authenticate state - ignored\n",
1689                        dev->name, print_mac(mac, mgmt->sa));
1690                 return;
1691         }
1692
1693         if (len < 24 + 6) {
1694                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1695                        "received from %s - ignored\n",
1696                        dev->name, len, print_mac(mac, mgmt->sa));
1697                 return;
1698         }
1699
1700         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1701             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1702                 printk(KERN_DEBUG "%s: authentication frame received from "
1703                        "unknown AP (SA=%s BSSID=%s) - "
1704                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1705                        print_mac(mac, mgmt->bssid));
1706                 return;
1707         }
1708
1709         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1710             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1711                 printk(KERN_DEBUG "%s: authentication frame received from "
1712                        "unknown BSSID (SA=%s BSSID=%s) - "
1713                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1714                        print_mac(mac, mgmt->bssid));
1715                 return;
1716         }
1717
1718         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1719         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1720         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1721
1722         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1723                "transaction=%d status=%d)\n",
1724                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1725                auth_transaction, status_code);
1726
1727         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1728                 /* IEEE 802.11 standard does not require authentication in IBSS
1729                  * networks and most implementations do not seem to use it.
1730                  * However, try to reply to authentication attempts if someone
1731                  * has actually implemented this.
1732                  * TODO: Could implement shared key authentication. */
1733                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1734                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1735                                "frame (alg=%d transaction=%d)\n",
1736                                dev->name, auth_alg, auth_transaction);
1737                         return;
1738                 }
1739                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1740         }
1741
1742         if (auth_alg != ifsta->auth_alg ||
1743             auth_transaction != ifsta->auth_transaction) {
1744                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1745                        "(alg=%d transaction=%d)\n",
1746                        dev->name, auth_alg, auth_transaction);
1747                 return;
1748         }
1749
1750         if (status_code != WLAN_STATUS_SUCCESS) {
1751                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1752                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1753                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1754                         u8 algs[3];
1755                         const int num_algs = ARRAY_SIZE(algs);
1756                         int i, pos;
1757                         algs[0] = algs[1] = algs[2] = 0xff;
1758                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1759                                 algs[0] = WLAN_AUTH_OPEN;
1760                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1761                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1762                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1763                                 algs[2] = WLAN_AUTH_LEAP;
1764                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1765                                 pos = 0;
1766                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1767                                 pos = 1;
1768                         else
1769                                 pos = 2;
1770                         for (i = 0; i < num_algs; i++) {
1771                                 pos++;
1772                                 if (pos >= num_algs)
1773                                         pos = 0;
1774                                 if (algs[pos] == ifsta->auth_alg ||
1775                                     algs[pos] == 0xff)
1776                                         continue;
1777                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1778                                     !ieee80211_sta_wep_configured(dev))
1779                                         continue;
1780                                 ifsta->auth_alg = algs[pos];
1781                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1782                                        "next try\n",
1783                                        dev->name, ifsta->auth_alg);
1784                                 break;
1785                         }
1786                 }
1787                 return;
1788         }
1789
1790         switch (ifsta->auth_alg) {
1791         case WLAN_AUTH_OPEN:
1792         case WLAN_AUTH_LEAP:
1793                 ieee80211_auth_completed(dev, ifsta);
1794                 break;
1795         case WLAN_AUTH_SHARED_KEY:
1796                 if (ifsta->auth_transaction == 4)
1797                         ieee80211_auth_completed(dev, ifsta);
1798                 else
1799                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1800                 break;
1801         }
1802 }
1803
1804
1805 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1806                                      struct ieee80211_if_sta *ifsta,
1807                                      struct ieee80211_mgmt *mgmt,
1808                                      size_t len)
1809 {
1810         u16 reason_code;
1811         DECLARE_MAC_BUF(mac);
1812
1813         if (len < 24 + 2) {
1814                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1815                        "received from %s - ignored\n",
1816                        dev->name, len, print_mac(mac, mgmt->sa));
1817                 return;
1818         }
1819
1820         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1821                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1822                        "unknown AP (SA=%s BSSID=%s) - "
1823                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1824                        print_mac(mac, mgmt->bssid));
1825                 return;
1826         }
1827
1828         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1829
1830         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1831                " (reason=%d)\n",
1832                dev->name, print_mac(mac, mgmt->sa), reason_code);
1833
1834         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1835                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1836
1837         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1838             ifsta->state == IEEE80211_ASSOCIATE ||
1839             ifsta->state == IEEE80211_ASSOCIATED) {
1840                 ifsta->state = IEEE80211_AUTHENTICATE;
1841                 mod_timer(&ifsta->timer, jiffies +
1842                                       IEEE80211_RETRY_AUTH_INTERVAL);
1843         }
1844
1845         ieee80211_set_disassoc(dev, ifsta, 1);
1846         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1847 }
1848
1849
1850 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1851                                        struct ieee80211_if_sta *ifsta,
1852                                        struct ieee80211_mgmt *mgmt,
1853                                        size_t len)
1854 {
1855         u16 reason_code;
1856         DECLARE_MAC_BUF(mac);
1857
1858         if (len < 24 + 2) {
1859                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1860                        "received from %s - ignored\n",
1861                        dev->name, len, print_mac(mac, mgmt->sa));
1862                 return;
1863         }
1864
1865         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1866                 printk(KERN_DEBUG "%s: disassociation frame received from "
1867                        "unknown AP (SA=%s BSSID=%s) - "
1868                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1869                        print_mac(mac, mgmt->bssid));
1870                 return;
1871         }
1872
1873         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1874
1875         printk(KERN_DEBUG "%s: RX disassociation from %s"
1876                " (reason=%d)\n",
1877                dev->name, print_mac(mac, mgmt->sa), reason_code);
1878
1879         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1880                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1881
1882         if (ifsta->state == IEEE80211_ASSOCIATED) {
1883                 ifsta->state = IEEE80211_ASSOCIATE;
1884                 mod_timer(&ifsta->timer, jiffies +
1885                                       IEEE80211_RETRY_AUTH_INTERVAL);
1886         }
1887
1888         ieee80211_set_disassoc(dev, ifsta, 0);
1889 }
1890
1891
1892 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1893                                          struct ieee80211_if_sta *ifsta,
1894                                          struct ieee80211_mgmt *mgmt,
1895                                          size_t len,
1896                                          int reassoc)
1897 {
1898         struct ieee80211_local *local = sdata->local;
1899         struct net_device *dev = sdata->dev;
1900         struct ieee80211_supported_band *sband;
1901         struct sta_info *sta;
1902         u64 rates, basic_rates;
1903         u16 capab_info, status_code, aid;
1904         struct ieee802_11_elems elems;
1905         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1906         u8 *pos;
1907         int i, j;
1908         DECLARE_MAC_BUF(mac);
1909         bool have_higher_than_11mbit = false;
1910
1911         /* AssocResp and ReassocResp have identical structure, so process both
1912          * of them in this function. */
1913
1914         if (ifsta->state != IEEE80211_ASSOCIATE) {
1915                 printk(KERN_DEBUG "%s: association frame received from "
1916                        "%s, but not in associate state - ignored\n",
1917                        dev->name, print_mac(mac, mgmt->sa));
1918                 return;
1919         }
1920
1921         if (len < 24 + 6) {
1922                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1923                        "received from %s - ignored\n",
1924                        dev->name, len, print_mac(mac, mgmt->sa));
1925                 return;
1926         }
1927
1928         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1929                 printk(KERN_DEBUG "%s: association frame received from "
1930                        "unknown AP (SA=%s BSSID=%s) - "
1931                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1932                        print_mac(mac, mgmt->bssid));
1933                 return;
1934         }
1935
1936         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1937         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1938         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1939
1940         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1941                "status=%d aid=%d)\n",
1942                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1943                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1944
1945         if (status_code != WLAN_STATUS_SUCCESS) {
1946                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1947                        dev->name, status_code);
1948                 /* if this was a reassociation, ensure we try a "full"
1949                  * association next time. This works around some broken APs
1950                  * which do not correctly reject reassociation requests. */
1951                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1952                 return;
1953         }
1954
1955         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1956                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1957                        "set\n", dev->name, aid);
1958         aid &= ~(BIT(15) | BIT(14));
1959
1960         pos = mgmt->u.assoc_resp.variable;
1961         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1962
1963         if (!elems.supp_rates) {
1964                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1965                        dev->name);
1966                 return;
1967         }
1968
1969         printk(KERN_DEBUG "%s: associated\n", dev->name);
1970         ifsta->aid = aid;
1971         ifsta->ap_capab = capab_info;
1972
1973         kfree(ifsta->assocresp_ies);
1974         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1975         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1976         if (ifsta->assocresp_ies)
1977                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1978
1979         rcu_read_lock();
1980
1981         /* Add STA entry for the AP */
1982         sta = sta_info_get(local, ifsta->bssid);
1983         if (!sta) {
1984                 struct ieee80211_sta_bss *bss;
1985                 int err;
1986
1987                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1988                 if (!sta) {
1989                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1990                                " the AP\n", dev->name);
1991                         rcu_read_unlock();
1992                         return;
1993                 }
1994                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1995                                            local->hw.conf.channel->center_freq,
1996                                            ifsta->ssid, ifsta->ssid_len);
1997                 if (bss) {
1998                         sta->last_signal = bss->signal;
1999                         sta->last_qual = bss->qual;
2000                         sta->last_noise = bss->noise;
2001                         ieee80211_rx_bss_put(dev, bss);
2002                 }
2003
2004                 err = sta_info_insert(sta);
2005                 if (err) {
2006                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
2007                                " the AP (error %d)\n", dev->name, err);
2008                         rcu_read_unlock();
2009                         return;
2010                 }
2011         }
2012
2013         /*
2014          * FIXME: Do we really need to update the sta_info's information here?
2015          *        We already know about the AP (we found it in our list) so it
2016          *        should already be filled with the right info, no?
2017          *        As is stands, all this is racy because typically we assume
2018          *        the information that is filled in here (except flags) doesn't
2019          *        change while a STA structure is alive. As such, it should move
2020          *        to between the sta_info_alloc() and sta_info_insert() above.
2021          */
2022
2023         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2024                            WLAN_STA_AUTHORIZED);
2025
2026         rates = 0;
2027         basic_rates = 0;
2028         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2029
2030         for (i = 0; i < elems.supp_rates_len; i++) {
2031                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2032
2033                 if (rate > 110)
2034                         have_higher_than_11mbit = true;
2035
2036                 for (j = 0; j < sband->n_bitrates; j++) {
2037                         if (sband->bitrates[j].bitrate == rate)
2038                                 rates |= BIT(j);
2039                         if (elems.supp_rates[i] & 0x80)
2040                                 basic_rates |= BIT(j);
2041                 }
2042         }
2043
2044         for (i = 0; i < elems.ext_supp_rates_len; i++) {
2045                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2046
2047                 if (rate > 110)
2048                         have_higher_than_11mbit = true;
2049
2050                 for (j = 0; j < sband->n_bitrates; j++) {
2051                         if (sband->bitrates[j].bitrate == rate)
2052                                 rates |= BIT(j);
2053                         if (elems.ext_supp_rates[i] & 0x80)
2054                                 basic_rates |= BIT(j);
2055                 }
2056         }
2057
2058         sta->supp_rates[local->hw.conf.channel->band] = rates;
2059         sdata->basic_rates = basic_rates;
2060
2061         /* cf. IEEE 802.11 9.2.12 */
2062         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2063             have_higher_than_11mbit)
2064                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2065         else
2066                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2067
2068         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2069             (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2070                 struct ieee80211_ht_bss_info bss_info;
2071                 ieee80211_ht_cap_ie_to_ht_info(
2072                                 (struct ieee80211_ht_cap *)
2073                                 elems.ht_cap_elem, &sta->ht_info);
2074                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2075                                 (struct ieee80211_ht_addt_info *)
2076                                 elems.ht_info_elem, &bss_info);
2077                 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2078         }
2079
2080         rate_control_rate_init(sta, local);
2081
2082         if (elems.wmm_param) {
2083                 set_sta_flags(sta, WLAN_STA_WME);
2084                 rcu_read_unlock();
2085                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2086                                          elems.wmm_param_len);
2087         } else
2088                 rcu_read_unlock();
2089
2090         /* set AID and assoc capability,
2091          * ieee80211_set_associated() will tell the driver */
2092         bss_conf->aid = aid;
2093         bss_conf->assoc_capability = capab_info;
2094         ieee80211_set_associated(dev, ifsta, 1);
2095
2096         ieee80211_associated(dev, ifsta);
2097 }
2098
2099
2100 /* Caller must hold local->sta_bss_lock */
2101 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2102                                         struct ieee80211_sta_bss *bss)
2103 {
2104         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2105         u8 hash_idx;
2106
2107         if (bss_mesh_cfg(bss))
2108                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2109                                         bss_mesh_id_len(bss));
2110         else
2111                 hash_idx = STA_HASH(bss->bssid);
2112
2113         bss->hnext = local->sta_bss_hash[hash_idx];
2114         local->sta_bss_hash[hash_idx] = bss;
2115 }
2116
2117
2118 /* Caller must hold local->sta_bss_lock */
2119 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2120                                         struct ieee80211_sta_bss *bss)
2121 {
2122         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2123         struct ieee80211_sta_bss *b, *prev = NULL;
2124         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2125         while (b) {
2126                 if (b == bss) {
2127                         if (!prev)
2128                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2129                                         bss->hnext;
2130                         else
2131                                 prev->hnext = bss->hnext;
2132                         break;
2133                 }
2134                 prev = b;
2135                 b = b->hnext;
2136         }
2137 }
2138
2139
2140 static struct ieee80211_sta_bss *
2141 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2142                      u8 *ssid, u8 ssid_len)
2143 {
2144         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2145         struct ieee80211_sta_bss *bss;
2146
2147         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2148         if (!bss)
2149                 return NULL;
2150         atomic_inc(&bss->users);
2151         atomic_inc(&bss->users);
2152         memcpy(bss->bssid, bssid, ETH_ALEN);
2153         bss->freq = freq;
2154         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2155                 memcpy(bss->ssid, ssid, ssid_len);
2156                 bss->ssid_len = ssid_len;
2157         }
2158
2159         spin_lock_bh(&local->sta_bss_lock);
2160         /* TODO: order by RSSI? */
2161         list_add_tail(&bss->list, &local->sta_bss_list);
2162         __ieee80211_rx_bss_hash_add(dev, bss);
2163         spin_unlock_bh(&local->sta_bss_lock);
2164         return bss;
2165 }
2166
2167 static struct ieee80211_sta_bss *
2168 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2169                      u8 *ssid, u8 ssid_len)
2170 {
2171         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2172         struct ieee80211_sta_bss *bss;
2173
2174         spin_lock_bh(&local->sta_bss_lock);
2175         bss = local->sta_bss_hash[STA_HASH(bssid)];
2176         while (bss) {
2177                 if (!bss_mesh_cfg(bss) &&
2178                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2179                     bss->freq == freq &&
2180                     bss->ssid_len == ssid_len &&
2181                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2182                         atomic_inc(&bss->users);
2183                         break;
2184                 }
2185                 bss = bss->hnext;
2186         }
2187         spin_unlock_bh(&local->sta_bss_lock);
2188         return bss;
2189 }
2190
2191 #ifdef CONFIG_MAC80211_MESH
2192 static struct ieee80211_sta_bss *
2193 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2194                           u8 *mesh_cfg, int freq)
2195 {
2196         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2197         struct ieee80211_sta_bss *bss;
2198
2199         spin_lock_bh(&local->sta_bss_lock);
2200         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2201         while (bss) {
2202                 if (bss_mesh_cfg(bss) &&
2203                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2204                     bss->freq == freq &&
2205                     mesh_id_len == bss->mesh_id_len &&
2206                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2207                                                  mesh_id_len))) {
2208                         atomic_inc(&bss->users);
2209                         break;
2210                 }
2211                 bss = bss->hnext;
2212         }
2213         spin_unlock_bh(&local->sta_bss_lock);
2214         return bss;
2215 }
2216
2217 static struct ieee80211_sta_bss *
2218 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2219                           u8 *mesh_cfg, int mesh_config_len, int freq)
2220 {
2221         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2222         struct ieee80211_sta_bss *bss;
2223
2224         if (mesh_config_len != MESH_CFG_LEN)
2225                 return NULL;
2226
2227         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2228         if (!bss)
2229                 return NULL;
2230
2231         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2232         if (!bss->mesh_cfg) {
2233                 kfree(bss);
2234                 return NULL;
2235         }
2236
2237         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2238                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2239                 if (!bss->mesh_id) {
2240                         kfree(bss->mesh_cfg);
2241                         kfree(bss);
2242                         return NULL;
2243                 }
2244                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2245         }
2246
2247         atomic_inc(&bss->users);
2248         atomic_inc(&bss->users);
2249         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2250         bss->mesh_id_len = mesh_id_len;
2251         bss->freq = freq;
2252         spin_lock_bh(&local->sta_bss_lock);
2253         /* TODO: order by RSSI? */
2254         list_add_tail(&bss->list, &local->sta_bss_list);
2255         __ieee80211_rx_bss_hash_add(dev, bss);
2256         spin_unlock_bh(&local->sta_bss_lock);
2257         return bss;
2258 }
2259 #endif
2260
2261 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2262 {
2263         kfree(bss->wpa_ie);
2264         kfree(bss->rsn_ie);
2265         kfree(bss->wmm_ie);
2266         kfree(bss->ht_ie);
2267         kfree(bss_mesh_id(bss));
2268         kfree(bss_mesh_cfg(bss));
2269         kfree(bss);
2270 }
2271
2272
2273 static void ieee80211_rx_bss_put(struct net_device *dev,
2274                                  struct ieee80211_sta_bss *bss)
2275 {
2276         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2277
2278         local_bh_disable();
2279         if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2280                 local_bh_enable();
2281                 return;
2282         }
2283
2284         __ieee80211_rx_bss_hash_del(dev, bss);
2285         list_del(&bss->list);
2286         spin_unlock_bh(&local->sta_bss_lock);
2287         ieee80211_rx_bss_free(bss);
2288 }
2289
2290
2291 void ieee80211_rx_bss_list_init(struct net_device *dev)
2292 {
2293         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2294         spin_lock_init(&local->sta_bss_lock);
2295         INIT_LIST_HEAD(&local->sta_bss_list);
2296 }
2297
2298
2299 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2300 {
2301         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2302         struct ieee80211_sta_bss *bss, *tmp;
2303
2304         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2305                 ieee80211_rx_bss_put(dev, bss);
2306 }
2307
2308
2309 static int ieee80211_sta_join_ibss(struct net_device *dev,
2310                                    struct ieee80211_if_sta *ifsta,
2311                                    struct ieee80211_sta_bss *bss)
2312 {
2313         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2314         int res, rates, i, j;
2315         struct sk_buff *skb;
2316         struct ieee80211_mgmt *mgmt;
2317         struct ieee80211_tx_control control;
2318         struct rate_selection ratesel;
2319         u8 *pos;
2320         struct ieee80211_sub_if_data *sdata;
2321         struct ieee80211_supported_band *sband;
2322
2323         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2324
2325         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2326
2327         /* Remove possible STA entries from other IBSS networks. */
2328         sta_info_flush_delayed(sdata);
2329
2330         if (local->ops->reset_tsf) {
2331                 /* Reset own TSF to allow time synchronization work. */
2332                 local->ops->reset_tsf(local_to_hw(local));
2333         }
2334         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2335         res = ieee80211_if_config(dev);
2336         if (res)
2337                 return res;
2338
2339         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2340
2341         sdata->drop_unencrypted = bss->capability &
2342                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2343
2344         res = ieee80211_set_freq(local, bss->freq);
2345
2346         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2347                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2348                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2349                 return -1;
2350         }
2351
2352         /* Set beacon template */
2353         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2354         do {
2355                 if (!skb)
2356                         break;
2357
2358                 skb_reserve(skb, local->hw.extra_tx_headroom);
2359
2360                 mgmt = (struct ieee80211_mgmt *)
2361                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2362                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2363                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2364                                                    IEEE80211_STYPE_BEACON);
2365                 memset(mgmt->da, 0xff, ETH_ALEN);
2366                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2367                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2368                 mgmt->u.beacon.beacon_int =
2369                         cpu_to_le16(local->hw.conf.beacon_int);
2370                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2371
2372                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2373                 *pos++ = WLAN_EID_SSID;
2374                 *pos++ = ifsta->ssid_len;
2375                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2376
2377                 rates = bss->supp_rates_len;
2378                 if (rates > 8)
2379                         rates = 8;
2380                 pos = skb_put(skb, 2 + rates);
2381                 *pos++ = WLAN_EID_SUPP_RATES;
2382                 *pos++ = rates;
2383                 memcpy(pos, bss->supp_rates, rates);
2384
2385                 if (bss->band == IEEE80211_BAND_2GHZ) {
2386                         pos = skb_put(skb, 2 + 1);
2387                         *pos++ = WLAN_EID_DS_PARAMS;
2388                         *pos++ = 1;
2389                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2390                 }
2391
2392                 pos = skb_put(skb, 2 + 2);
2393                 *pos++ = WLAN_EID_IBSS_PARAMS;
2394                 *pos++ = 2;
2395                 /* FIX: set ATIM window based on scan results */
2396                 *pos++ = 0;
2397                 *pos++ = 0;
2398
2399                 if (bss->supp_rates_len > 8) {
2400                         rates = bss->supp_rates_len - 8;
2401                         pos = skb_put(skb, 2 + rates);
2402                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2403                         *pos++ = rates;
2404                         memcpy(pos, &bss->supp_rates[8], rates);
2405                 }
2406
2407                 memset(&control, 0, sizeof(control));
2408                 rate_control_get_rate(dev, sband, skb, &ratesel);
2409                 if (ratesel.rate_idx < 0) {
2410                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2411                                "for IBSS beacon\n", dev->name);
2412                         break;
2413                 }
2414                 control.vif = &sdata->vif;
2415                 control.tx_rate_idx = ratesel.rate_idx;
2416                 if (sdata->bss_conf.use_short_preamble &&
2417                     sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2418                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2419                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2420                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2421                 control.retry_limit = 1;
2422
2423                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2424                 if (ifsta->probe_resp) {
2425                         mgmt = (struct ieee80211_mgmt *)
2426                                 ifsta->probe_resp->data;
2427                         mgmt->frame_control =
2428                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2429                                              IEEE80211_STYPE_PROBE_RESP);
2430                 } else {
2431                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2432                                "template for IBSS\n", dev->name);
2433                 }
2434
2435                 if (local->ops->beacon_update &&
2436                     local->ops->beacon_update(local_to_hw(local),
2437                                              skb, &control) == 0) {
2438                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2439                                "template\n", dev->name);
2440                         skb = NULL;
2441                 }
2442
2443                 rates = 0;
2444                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2445                 for (i = 0; i < bss->supp_rates_len; i++) {
2446                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2447                         for (j = 0; j < sband->n_bitrates; j++)
2448                                 if (sband->bitrates[j].bitrate == bitrate)
2449                                         rates |= BIT(j);
2450                 }
2451                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2452
2453                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2454         } while (0);
2455
2456         if (skb) {
2457                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2458                        "template\n", dev->name);
2459                 dev_kfree_skb(skb);
2460         }
2461
2462         ifsta->state = IEEE80211_IBSS_JOINED;
2463         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2464
2465         ieee80211_rx_bss_put(dev, bss);
2466
2467         return res;
2468 }
2469
2470 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2471                             struct ieee802_11_elems *elems,
2472                             enum ieee80211_band band)
2473 {
2474         struct ieee80211_supported_band *sband;
2475         struct ieee80211_rate *bitrates;
2476         size_t num_rates;
2477         u64 supp_rates;
2478         int i, j;
2479         sband = local->hw.wiphy->bands[band];
2480
2481         if (!sband) {
2482                 WARN_ON(1);
2483                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2484         }
2485
2486         bitrates = sband->bitrates;
2487         num_rates = sband->n_bitrates;
2488         supp_rates = 0;
2489         for (i = 0; i < elems->supp_rates_len +
2490                      elems->ext_supp_rates_len; i++) {
2491                 u8 rate = 0;
2492                 int own_rate;
2493                 if (i < elems->supp_rates_len)
2494                         rate = elems->supp_rates[i];
2495                 else if (elems->ext_supp_rates)
2496                         rate = elems->ext_supp_rates
2497                                 [i - elems->supp_rates_len];
2498                 own_rate = 5 * (rate & 0x7f);
2499                 for (j = 0; j < num_rates; j++)
2500                         if (bitrates[j].bitrate == own_rate)
2501                                 supp_rates |= BIT(j);
2502         }
2503         return supp_rates;
2504 }
2505
2506
2507 static void ieee80211_rx_bss_info(struct net_device *dev,
2508                                   struct ieee80211_mgmt *mgmt,
2509                                   size_t len,
2510                                   struct ieee80211_rx_status *rx_status,
2511                                   int beacon)
2512 {
2513         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2514         struct ieee802_11_elems elems;
2515         size_t baselen;
2516         int freq, clen;
2517         struct ieee80211_sta_bss *bss;
2518         struct sta_info *sta;
2519         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2520         u64 beacon_timestamp, rx_timestamp;
2521         struct ieee80211_channel *channel;
2522         DECLARE_MAC_BUF(mac);
2523         DECLARE_MAC_BUF(mac2);
2524
2525         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2526                 return; /* ignore ProbeResp to foreign address */
2527
2528 #if 0
2529         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2530                dev->name, beacon ? "Beacon" : "Probe Response",
2531                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2532 #endif
2533
2534         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2535         if (baselen > len)
2536                 return;
2537
2538         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2539         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2540
2541         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2542             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2543                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2544                                                 rx_status->band);
2545
2546                 mesh_neighbour_update(mgmt->sa, rates, dev,
2547                                       mesh_peer_accepts_plinks(&elems, dev));
2548         }
2549
2550         rcu_read_lock();
2551
2552         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2553             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2554             (sta = sta_info_get(local, mgmt->sa))) {
2555                 u64 prev_rates;
2556                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2557                                                         rx_status->band);
2558
2559                 prev_rates = sta->supp_rates[rx_status->band];
2560                 sta->supp_rates[rx_status->band] &= supp_rates;
2561                 if (sta->supp_rates[rx_status->band] == 0) {
2562                         /* No matching rates - this should not really happen.
2563                          * Make sure that at least one rate is marked
2564                          * supported to avoid issues with TX rate ctrl. */
2565                         sta->supp_rates[rx_status->band] =
2566                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2567                 }
2568                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2569                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2570                                "%s based on beacon info (0x%llx & 0x%llx -> "
2571                                "0x%llx)\n",
2572                                dev->name, print_mac(mac, sta->addr),
2573                                (unsigned long long) prev_rates,
2574                                (unsigned long long) supp_rates,
2575                                (unsigned long long) sta->supp_rates[rx_status->band]);
2576                 }
2577         }
2578
2579         rcu_read_unlock();
2580
2581         if (elems.ds_params && elems.ds_params_len == 1)
2582                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2583         else
2584                 freq = rx_status->freq;
2585
2586         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2587
2588         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2589                 return;
2590
2591 #ifdef CONFIG_MAC80211_MESH
2592         if (elems.mesh_config)
2593                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2594                                 elems.mesh_id_len, elems.mesh_config, freq);
2595         else
2596 #endif
2597                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2598                                            elems.ssid, elems.ssid_len);
2599         if (!bss) {
2600 #ifdef CONFIG_MAC80211_MESH
2601                 if (elems.mesh_config)
2602                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2603                                 elems.mesh_id_len, elems.mesh_config,
2604                                 elems.mesh_config_len, freq);
2605                 else
2606 #endif
2607                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2608                                                    elems.ssid, elems.ssid_len);
2609                 if (!bss)
2610                         return;
2611         } else {
2612 #if 0
2613                 /* TODO: order by RSSI? */
2614                 spin_lock_bh(&local->sta_bss_lock);
2615                 list_move_tail(&bss->list, &local->sta_bss_list);
2616                 spin_unlock_bh(&local->sta_bss_lock);
2617 #endif
2618         }
2619
2620         /* save the ERP value so that it is available at association time */
2621         if (elems.erp_info && elems.erp_info_len >= 1) {
2622                 bss->erp_value = elems.erp_info[0];
2623                 bss->has_erp_value = 1;
2624         }
2625
2626         if (elems.ht_cap_elem &&
2627              (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2628              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2629                 kfree(bss->ht_ie);
2630                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2631                 if (bss->ht_ie) {
2632                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2633                                 elems.ht_cap_elem_len + 2);
2634                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2635                 } else
2636                         bss->ht_ie_len = 0;
2637         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2638                 kfree(bss->ht_ie);
2639                 bss->ht_ie = NULL;
2640                 bss->ht_ie_len = 0;
2641         }
2642
2643         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2644         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2645
2646         bss->supp_rates_len = 0;
2647         if (elems.supp_rates) {
2648                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2649                 if (clen > elems.supp_rates_len)
2650                         clen = elems.supp_rates_len;
2651                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2652                        clen);
2653                 bss->supp_rates_len += clen;
2654         }
2655         if (elems.ext_supp_rates) {
2656                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2657                 if (clen > elems.ext_supp_rates_len)
2658                         clen = elems.ext_supp_rates_len;
2659                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2660                        elems.ext_supp_rates, clen);
2661                 bss->supp_rates_len += clen;
2662         }
2663
2664         bss->band = rx_status->band;
2665
2666         bss->timestamp = beacon_timestamp;
2667         bss->last_update = jiffies;
2668         bss->signal = rx_status->signal;
2669         bss->noise = rx_status->noise;
2670         bss->qual = rx_status->qual;
2671         if (!beacon && !bss->probe_resp)
2672                 bss->probe_resp = true;
2673
2674         /*
2675          * In STA mode, the remaining parameters should not be overridden
2676          * by beacons because they're not necessarily accurate there.
2677          */
2678         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2679             bss->probe_resp && beacon) {
2680                 ieee80211_rx_bss_put(dev, bss);
2681                 return;
2682         }
2683
2684         if (elems.wpa &&
2685             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2686              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2687                 kfree(bss->wpa_ie);
2688                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2689                 if (bss->wpa_ie) {
2690                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2691                         bss->wpa_ie_len = elems.wpa_len + 2;
2692                 } else
2693                         bss->wpa_ie_len = 0;
2694         } else if (!elems.wpa && bss->wpa_ie) {
2695                 kfree(bss->wpa_ie);
2696                 bss->wpa_ie = NULL;
2697                 bss->wpa_ie_len = 0;
2698         }
2699
2700         if (elems.rsn &&
2701             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2702              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2703                 kfree(bss->rsn_ie);
2704                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2705                 if (bss->rsn_ie) {
2706                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2707                         bss->rsn_ie_len = elems.rsn_len + 2;
2708                 } else
2709                         bss->rsn_ie_len = 0;
2710         } else if (!elems.rsn && bss->rsn_ie) {
2711                 kfree(bss->rsn_ie);
2712                 bss->rsn_ie = NULL;
2713                 bss->rsn_ie_len = 0;
2714         }
2715
2716         /*
2717          * Cf.
2718          * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2719          *
2720          * quoting:
2721          *
2722          * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2723          * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2724          * Alliance (September 1, 2004) is incorporated by reference herein.
2725          * The inclusion of the WMM Parameters in probe responses and
2726          * association responses is mandatory for WMM enabled networks. The
2727          * inclusion of the WMM Parameters in beacons, however, is optional.
2728          */
2729
2730         if (elems.wmm_param &&
2731             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2732              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2733                 kfree(bss->wmm_ie);
2734                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2735                 if (bss->wmm_ie) {
2736                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2737                                elems.wmm_param_len + 2);
2738                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2739                 } else
2740                         bss->wmm_ie_len = 0;
2741         } else if (elems.wmm_info &&
2742                     (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2743                      memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2744                  /* As for certain AP's Fifth bit is not set in WMM IE in
2745                   * beacon frames.So while parsing the beacon frame the
2746                   * wmm_info structure is used instead of wmm_param.
2747                   * wmm_info structure was never used to set bss->wmm_ie.
2748                   * This code fixes this problem by copying the WME
2749                   * information from wmm_info to bss->wmm_ie and enabling
2750                   * n-band association.
2751                   */
2752                 kfree(bss->wmm_ie);
2753                 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2754                 if (bss->wmm_ie) {
2755                         memcpy(bss->wmm_ie, elems.wmm_info - 2,
2756                                elems.wmm_info_len + 2);
2757                         bss->wmm_ie_len = elems.wmm_info_len + 2;
2758                 } else
2759                         bss->wmm_ie_len = 0;
2760         } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2761                 kfree(bss->wmm_ie);
2762                 bss->wmm_ie = NULL;
2763                 bss->wmm_ie_len = 0;
2764         }
2765
2766         /* check if we need to merge IBSS */
2767         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2768             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2769             bss->capability & WLAN_CAPABILITY_IBSS &&
2770             bss->freq == local->oper_channel->center_freq &&
2771             elems.ssid_len == sdata->u.sta.ssid_len &&
2772             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2773                 if (rx_status->flag & RX_FLAG_TSFT) {
2774                         /* in order for correct IBSS merging we need mactime
2775                          *
2776                          * since mactime is defined as the time the first data
2777                          * symbol of the frame hits the PHY, and the timestamp
2778                          * of the beacon is defined as "the time that the data
2779                          * symbol containing the first bit of the timestamp is
2780                          * transmitted to the PHY plus the transmitting STA’s
2781                          * delays through its local PHY from the MAC-PHY
2782                          * interface to its interface with the WM"
2783                          * (802.11 11.1.2) - equals the time this bit arrives at
2784                          * the receiver - we have to take into account the
2785                          * offset between the two.
2786                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2787                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2788                          */
2789                         int rate = local->hw.wiphy->bands[rx_status->band]->
2790                                         bitrates[rx_status->rate_idx].bitrate;
2791                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2792                 } else if (local && local->ops && local->ops->get_tsf)
2793                         /* second best option: get current TSF */
2794                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2795                 else
2796                         /* can't merge without knowing the TSF */
2797                         rx_timestamp = -1LLU;
2798 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2799                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2800                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2801                        print_mac(mac, mgmt->sa),
2802                        print_mac(mac2, mgmt->bssid),
2803                        (unsigned long long)rx_timestamp,
2804                        (unsigned long long)beacon_timestamp,
2805                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2806                        jiffies);
2807 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2808                 if (beacon_timestamp > rx_timestamp) {
2809 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2810                         if (net_ratelimit())
2811 #endif
2812                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2813                                        "local TSF - IBSS merge with BSSID %s\n",
2814                                        dev->name, print_mac(mac, mgmt->bssid));
2815                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2816                         ieee80211_ibss_add_sta(dev, NULL,
2817                                                mgmt->bssid, mgmt->sa);
2818                 }
2819         }
2820
2821         ieee80211_rx_bss_put(dev, bss);
2822 }
2823
2824
2825 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2826                                          struct ieee80211_mgmt *mgmt,
2827                                          size_t len,
2828                                          struct ieee80211_rx_status *rx_status)
2829 {
2830         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2831 }
2832
2833
2834 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2835                                      struct ieee80211_mgmt *mgmt,
2836                                      size_t len,
2837                                      struct ieee80211_rx_status *rx_status)
2838 {
2839         struct ieee80211_sub_if_data *sdata;
2840         struct ieee80211_if_sta *ifsta;
2841         size_t baselen;
2842         struct ieee802_11_elems elems;
2843         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2844         struct ieee80211_conf *conf = &local->hw.conf;
2845         u32 changed = 0;
2846
2847         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2848
2849         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2850         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2851                 return;
2852         ifsta = &sdata->u.sta;
2853
2854         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2855             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2856                 return;
2857
2858         /* Process beacon from the current BSS */
2859         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2860         if (baselen > len)
2861                 return;
2862
2863         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2864
2865         ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2866                                  elems.wmm_param_len);
2867
2868         /* Do not send changes to driver if we are scanning. This removes
2869          * requirement that driver's bss_info_changed function needs to be
2870          * atomic. */
2871         if (local->sta_sw_scanning || local->sta_hw_scanning)
2872                 return;
2873
2874         if (elems.erp_info && elems.erp_info_len >= 1)
2875                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2876         else {
2877                 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2878                 changed |= ieee80211_handle_protect_preamb(sdata, false,
2879                                 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2880         }
2881
2882         if (elems.ht_cap_elem && elems.ht_info_elem &&
2883             elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2884                 struct ieee80211_ht_bss_info bss_info;
2885
2886                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2887                                 (struct ieee80211_ht_addt_info *)
2888                                 elems.ht_info_elem, &bss_info);
2889                 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2890                                                &bss_info);
2891         }
2892
2893         ieee80211_bss_info_change_notify(sdata, changed);
2894 }
2895
2896
2897 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2898                                         struct ieee80211_if_sta *ifsta,
2899                                         struct ieee80211_mgmt *mgmt,
2900                                         size_t len,
2901                                         struct ieee80211_rx_status *rx_status)
2902 {
2903         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2904         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2905         int tx_last_beacon;
2906         struct sk_buff *skb;
2907         struct ieee80211_mgmt *resp;
2908         u8 *pos, *end;
2909         DECLARE_MAC_BUF(mac);
2910 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2911         DECLARE_MAC_BUF(mac2);
2912         DECLARE_MAC_BUF(mac3);
2913 #endif
2914
2915         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2916             ifsta->state != IEEE80211_IBSS_JOINED ||
2917             len < 24 + 2 || !ifsta->probe_resp)
2918                 return;
2919
2920         if (local->ops->tx_last_beacon)
2921                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2922         else
2923                 tx_last_beacon = 1;
2924
2925 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2926         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2927                "%s (tx_last_beacon=%d)\n",
2928                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2929                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2930 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2931
2932         if (!tx_last_beacon)
2933                 return;
2934
2935         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2936             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2937                 return;
2938
2939         end = ((u8 *) mgmt) + len;
2940         pos = mgmt->u.probe_req.variable;
2941         if (pos[0] != WLAN_EID_SSID ||
2942             pos + 2 + pos[1] > end) {
2943                 if (net_ratelimit()) {
2944                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2945                                "from %s\n",
2946                                dev->name, print_mac(mac, mgmt->sa));
2947                 }
2948                 return;
2949         }
2950         if (pos[1] != 0 &&
2951             (pos[1] != ifsta->ssid_len ||
2952              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2953                 /* Ignore ProbeReq for foreign SSID */
2954                 return;
2955         }
2956
2957         /* Reply with ProbeResp */
2958         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2959         if (!skb)
2960                 return;
2961
2962         resp = (struct ieee80211_mgmt *) skb->data;
2963         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2964 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2965         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2966                dev->name, print_mac(mac, resp->da));
2967 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2968         ieee80211_sta_tx(dev, skb, 0);
2969 }
2970
2971 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2972                                      struct ieee80211_if_sta *ifsta,
2973                                      struct ieee80211_mgmt *mgmt,
2974                                      size_t len,
2975                                      struct ieee80211_rx_status *rx_status)
2976 {
2977         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2978
2979         if (len < IEEE80211_MIN_ACTION_SIZE)
2980                 return;
2981
2982         switch (mgmt->u.action.category) {
2983         case WLAN_CATEGORY_BACK:
2984                 switch (mgmt->u.action.u.addba_req.action_code) {
2985                 case WLAN_ACTION_ADDBA_REQ:
2986                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2987                                    sizeof(mgmt->u.action.u.addba_req)))
2988                                 break;
2989                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2990                         break;
2991                 case WLAN_ACTION_ADDBA_RESP:
2992                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2993                                    sizeof(mgmt->u.action.u.addba_resp)))
2994                                 break;
2995                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2996                         break;
2997                 case WLAN_ACTION_DELBA:
2998                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2999                                    sizeof(mgmt->u.action.u.delba)))
3000                                 break;
3001                         ieee80211_sta_process_delba(dev, mgmt, len);
3002                         break;
3003                 default:
3004                         if (net_ratelimit())
3005                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3006                                         dev->name);
3007                         break;
3008                 }
3009                 break;
3010         case PLINK_CATEGORY:
3011                 if (ieee80211_vif_is_mesh(&sdata->vif))
3012                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3013                 break;
3014         case MESH_PATH_SEL_CATEGORY:
3015                 if (ieee80211_vif_is_mesh(&sdata->vif))
3016                         mesh_rx_path_sel_frame(dev, mgmt, len);
3017                 break;
3018         default:
3019                 if (net_ratelimit())
3020                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
3021                         "category=%d\n", dev->name, mgmt->u.action.category);
3022                 break;
3023         }
3024 }
3025
3026 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3027                            struct ieee80211_rx_status *rx_status)
3028 {
3029         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3030         struct ieee80211_sub_if_data *sdata;
3031         struct ieee80211_if_sta *ifsta;
3032         struct ieee80211_mgmt *mgmt;
3033         u16 fc;
3034
3035         if (skb->len < 24)
3036                 goto fail;
3037
3038         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3039         ifsta = &sdata->u.sta;
3040
3041         mgmt = (struct ieee80211_mgmt *) skb->data;
3042         fc = le16_to_cpu(mgmt->frame_control);
3043
3044         switch (fc & IEEE80211_FCTL_STYPE) {
3045         case IEEE80211_STYPE_PROBE_REQ:
3046         case IEEE80211_STYPE_PROBE_RESP:
3047         case IEEE80211_STYPE_BEACON:
3048         case IEEE80211_STYPE_ACTION:
3049                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3050         case IEEE80211_STYPE_AUTH:
3051         case IEEE80211_STYPE_ASSOC_RESP:
3052         case IEEE80211_STYPE_REASSOC_RESP:
3053         case IEEE80211_STYPE_DEAUTH:
3054         case IEEE80211_STYPE_DISASSOC:
3055                 skb_queue_tail(&ifsta->skb_queue, skb);
3056                 queue_work(local->hw.workqueue, &ifsta->work);
3057                 return;
3058         default:
3059                 printk(KERN_DEBUG "%s: received unknown management frame - "
3060                        "stype=%d\n", dev->name,
3061                        (fc & IEEE80211_FCTL_STYPE) >> 4);
3062                 break;
3063         }
3064
3065  fail:
3066         kfree_skb(skb);
3067 }
3068
3069
3070 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3071                                          struct sk_buff *skb)
3072 {
3073         struct ieee80211_rx_status *rx_status;
3074         struct ieee80211_sub_if_data *sdata;
3075         struct ieee80211_if_sta *ifsta;
3076         struct ieee80211_mgmt *mgmt;
3077         u16 fc;
3078
3079         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3080         ifsta = &sdata->u.sta;
3081
3082         rx_status = (struct ieee80211_rx_status *) skb->cb;
3083         mgmt = (struct ieee80211_mgmt *) skb->data;
3084         fc = le16_to_cpu(mgmt->frame_control);
3085
3086         switch (fc & IEEE80211_FCTL_STYPE) {
3087         case IEEE80211_STYPE_PROBE_REQ:
3088                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3089                                             rx_status);
3090                 break;
3091         case IEEE80211_STYPE_PROBE_RESP:
3092                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3093                 break;
3094         case IEEE80211_STYPE_BEACON:
3095                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3096                 break;
3097         case IEEE80211_STYPE_AUTH:
3098                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3099                 break;
3100         case IEEE80211_STYPE_ASSOC_RESP:
3101                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3102                 break;
3103         case IEEE80211_STYPE_REASSOC_RESP:
3104                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3105                 break;
3106         case IEEE80211_STYPE_DEAUTH:
3107                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3108                 break;
3109         case IEEE80211_STYPE_DISASSOC:
3110                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3111                 break;
3112         case IEEE80211_STYPE_ACTION:
3113                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3114                 break;
3115         }
3116
3117         kfree_skb(skb);
3118 }
3119
3120
3121 ieee80211_rx_result
3122 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3123                       struct ieee80211_rx_status *rx_status)
3124 {
3125         struct ieee80211_mgmt *mgmt;
3126         u16 fc;
3127
3128         if (skb->len < 2)
3129                 return RX_DROP_UNUSABLE;
3130
3131         mgmt = (struct ieee80211_mgmt *) skb->data;
3132         fc = le16_to_cpu(mgmt->frame_control);
3133
3134         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3135                 return RX_CONTINUE;
3136
3137         if (skb->len < 24)
3138                 return RX_DROP_MONITOR;
3139
3140         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3141                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3142                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3143                                                      skb->len, rx_status);
3144                         dev_kfree_skb(skb);
3145                         return RX_QUEUED;
3146                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3147                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3148                                                  rx_status);
3149                         dev_kfree_skb(skb);
3150                         return RX_QUEUED;
3151                 }
3152         }
3153         return RX_CONTINUE;
3154 }
3155
3156
3157 static int ieee80211_sta_active_ibss(struct net_device *dev)
3158 {
3159         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3160         int active = 0;
3161         struct sta_info *sta;
3162         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3163
3164         rcu_read_lock();
3165
3166         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3167                 if (sta->sdata == sdata &&
3168                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3169                                jiffies)) {
3170                         active++;
3171                         break;
3172                 }
3173         }
3174
3175         rcu_read_unlock();
3176
3177         return active;
3178 }
3179
3180
3181 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3182 {
3183         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3184         struct sta_info *sta, *tmp;
3185         LIST_HEAD(tmp_list);
3186         DECLARE_MAC_BUF(mac);
3187         unsigned long flags;
3188
3189         spin_lock_irqsave(&local->sta_lock, flags);
3190         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3191                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3192                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3193                                dev->name, print_mac(mac, sta->addr));
3194                         __sta_info_unlink(&sta);
3195                         if (sta)
3196                                 list_add(&sta->list, &tmp_list);
3197                 }
3198         spin_unlock_irqrestore(&local->sta_lock, flags);
3199
3200         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3201                 sta_info_destroy(sta);
3202 }
3203
3204
3205 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3206                                      struct ieee80211_if_sta *ifsta)
3207 {
3208         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3209
3210         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3211         if (ieee80211_sta_active_ibss(dev))
3212                 return;
3213
3214         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3215                "IBSS networks with same SSID (merge)\n", dev->name);
3216         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3217 }
3218
3219
3220 #ifdef CONFIG_MAC80211_MESH
3221 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3222                            struct ieee80211_if_sta *ifsta)
3223 {
3224         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3225         bool free_plinks;
3226
3227         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3228         mesh_path_expire(dev);
3229
3230         free_plinks = mesh_plink_availables(sdata);
3231         if (free_plinks != sdata->u.sta.accepting_plinks)
3232                 ieee80211_if_config_beacon(dev);
3233
3234         mod_timer(&ifsta->timer, jiffies +
3235                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3236 }
3237
3238
3239 void ieee80211_start_mesh(struct net_device *dev)
3240 {
3241         struct ieee80211_if_sta *ifsta;
3242         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3243         ifsta = &sdata->u.sta;
3244         ifsta->state = IEEE80211_MESH_UP;
3245         ieee80211_sta_timer((unsigned long)sdata);
3246 }
3247 #endif
3248
3249
3250 void ieee80211_sta_timer(unsigned long data)
3251 {
3252         struct ieee80211_sub_if_data *sdata =
3253                 (struct ieee80211_sub_if_data *) data;
3254         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3255         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3256
3257         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3258         queue_work(local->hw.workqueue, &ifsta->work);
3259 }
3260
3261 void ieee80211_sta_work(struct work_struct *work)
3262 {
3263         struct ieee80211_sub_if_data *sdata =
3264                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3265         struct net_device *dev = sdata->dev;
3266         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3267         struct ieee80211_if_sta *ifsta;
3268         struct sk_buff *skb;
3269
3270         if (!netif_running(dev))
3271                 return;
3272
3273         if (local->sta_sw_scanning || local->sta_hw_scanning)
3274                 return;
3275
3276         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3277             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3278             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3279                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3280                        "(type=%d)\n", dev->name, sdata->vif.type);
3281                 return;
3282         }
3283         ifsta = &sdata->u.sta;
3284
3285         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3286                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3287
3288 #ifdef CONFIG_MAC80211_MESH
3289         if (ifsta->preq_queue_len &&
3290             time_after(jiffies,
3291                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3292                 mesh_path_start_discovery(dev);
3293 #endif
3294
3295         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3296             ifsta->state != IEEE80211_ASSOCIATE &&
3297             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3298                 if (ifsta->scan_ssid_len)
3299                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3300                 else
3301                         ieee80211_sta_start_scan(dev, NULL, 0);
3302                 return;
3303         }
3304
3305         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3306                 if (ieee80211_sta_config_auth(dev, ifsta))
3307                         return;
3308                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3309         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3310                 return;
3311
3312         switch (ifsta->state) {
3313         case IEEE80211_DISABLED:
3314                 break;
3315         case IEEE80211_AUTHENTICATE:
3316                 ieee80211_authenticate(dev, ifsta);
3317                 break;
3318         case IEEE80211_ASSOCIATE:
3319                 ieee80211_associate(dev, ifsta);
3320                 break;
3321         case IEEE80211_ASSOCIATED:
3322                 ieee80211_associated(dev, ifsta);
3323                 break;
3324         case IEEE80211_IBSS_SEARCH:
3325                 ieee80211_sta_find_ibss(dev, ifsta);
3326                 break;
3327         case IEEE80211_IBSS_JOINED:
3328                 ieee80211_sta_merge_ibss(dev, ifsta);
3329                 break;
3330 #ifdef CONFIG_MAC80211_MESH
3331         case IEEE80211_MESH_UP:
3332                 ieee80211_mesh_housekeeping(dev, ifsta);
3333                 break;
3334 #endif
3335         default:
3336                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3337                        ifsta->state);
3338                 break;
3339         }
3340
3341         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3342                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3343                        "mixed-cell disabled - disassociate\n", dev->name);
3344
3345                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3346                 ieee80211_set_disassoc(dev, ifsta, 0);
3347         }
3348 }
3349
3350
3351 static void ieee80211_sta_reset_auth(struct net_device *dev,
3352                                      struct ieee80211_if_sta *ifsta)
3353 {
3354         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3355
3356         if (local->ops->reset_tsf) {
3357                 /* Reset own TSF to allow time synchronization work. */
3358                 local->ops->reset_tsf(local_to_hw(local));
3359         }
3360
3361         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3362
3363
3364         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3365                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3366         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3367                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3368         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3369                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3370         else
3371                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3372         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3373                ifsta->auth_alg);
3374         ifsta->auth_transaction = -1;
3375         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3376         ifsta->auth_tries = ifsta->assoc_tries = 0;
3377         netif_carrier_off(dev);
3378 }
3379
3380
3381 void ieee80211_sta_req_auth(struct net_device *dev,
3382                             struct ieee80211_if_sta *ifsta)
3383 {
3384         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3385         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3386
3387         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3388                 return;
3389
3390         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3391                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3392             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3393                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3394                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3395                 queue_work(local->hw.workqueue, &ifsta->work);
3396         }
3397 }
3398
3399 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3400                                     const char *ssid, int ssid_len)
3401 {
3402         int tmp, hidden_ssid;
3403
3404         if (ssid_len == ifsta->ssid_len &&
3405             !memcmp(ifsta->ssid, ssid, ssid_len))
3406                 return 1;
3407
3408         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3409                 return 0;
3410
3411         hidden_ssid = 1;
3412         tmp = ssid_len;
3413         while (tmp--) {
3414                 if (ssid[tmp] != '\0') {
3415                         hidden_ssid = 0;
3416                         break;
3417                 }
3418         }
3419
3420         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3421                 return 1;
3422
3423         if (ssid_len == 1 && ssid[0] == ' ')
3424                 return 1;
3425
3426         return 0;
3427 }
3428
3429 static int ieee80211_sta_config_auth(struct net_device *dev,
3430                                      struct ieee80211_if_sta *ifsta)
3431 {
3432         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3433         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3434         struct ieee80211_sta_bss *bss, *selected = NULL;
3435         int top_rssi = 0, freq;
3436
3437         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3438             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3439                 ifsta->state = IEEE80211_AUTHENTICATE;
3440                 ieee80211_sta_reset_auth(dev, ifsta);
3441                 return 0;
3442         }
3443
3444         spin_lock_bh(&local->sta_bss_lock);
3445         freq = local->oper_channel->center_freq;
3446         list_for_each_entry(bss, &local->sta_bss_list, list) {
3447                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3448                         continue;
3449
3450                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3451                     !!sdata->default_key)
3452                         continue;
3453
3454                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3455                     bss->freq != freq)
3456                         continue;
3457
3458                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3459                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3460                         continue;
3461
3462                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3463                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3464                         continue;
3465
3466                 if (!selected || top_rssi < bss->signal) {
3467                         selected = bss;
3468                         top_rssi = bss->signal;
3469                 }
3470         }
3471         if (selected)
3472                 atomic_inc(&selected->users);
3473         spin_unlock_bh(&local->sta_bss_lock);
3474
3475         if (selected) {
3476                 ieee80211_set_freq(local, selected->freq);
3477                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3478                         ieee80211_sta_set_ssid(dev, selected->ssid,
3479                                                selected->ssid_len);
3480                 ieee80211_sta_set_bssid(dev, selected->bssid);
3481                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3482                 ieee80211_rx_bss_put(dev, selected);
3483                 ifsta->state = IEEE80211_AUTHENTICATE;
3484                 ieee80211_sta_reset_auth(dev, ifsta);
3485                 return 0;
3486         } else {
3487                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3488                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3489                                 ieee80211_sta_start_scan(dev, NULL, 0);
3490                         else
3491                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3492                                                          ifsta->ssid_len);
3493                         ifsta->state = IEEE80211_AUTHENTICATE;
3494                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3495                 } else
3496                         ifsta->state = IEEE80211_DISABLED;
3497         }
3498         return -1;
3499 }
3500
3501
3502 static int ieee80211_sta_create_ibss(struct net_device *dev,
3503                                      struct ieee80211_if_sta *ifsta)
3504 {
3505         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3506         struct ieee80211_sta_bss *bss;
3507         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3508         struct ieee80211_supported_band *sband;
3509         u8 bssid[ETH_ALEN], *pos;
3510         int i;
3511         DECLARE_MAC_BUF(mac);
3512
3513 #if 0
3514         /* Easier testing, use fixed BSSID. */
3515         memset(bssid, 0xfe, ETH_ALEN);
3516 #else
3517         /* Generate random, not broadcast, locally administered BSSID. Mix in
3518          * own MAC address to make sure that devices that do not have proper
3519          * random number generator get different BSSID. */
3520         get_random_bytes(bssid, ETH_ALEN);
3521         for (i = 0; i < ETH_ALEN; i++)
3522                 bssid[i] ^= dev->dev_addr[i];
3523         bssid[0] &= ~0x01;
3524         bssid[0] |= 0x02;
3525 #endif
3526
3527         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3528                dev->name, print_mac(mac, bssid));
3529
3530         bss = ieee80211_rx_bss_add(dev, bssid,
3531                                    local->hw.conf.channel->center_freq,
3532                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3533         if (!bss)
3534                 return -ENOMEM;
3535
3536         bss->band = local->hw.conf.channel->band;
3537         sband = local->hw.wiphy->bands[bss->band];
3538
3539         if (local->hw.conf.beacon_int == 0)
3540                 local->hw.conf.beacon_int = 10000;
3541         bss->beacon_int = local->hw.conf.beacon_int;
3542         bss->last_update = jiffies;
3543         bss->capability = WLAN_CAPABILITY_IBSS;
3544
3545         if (sdata->default_key)
3546                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3547         else
3548                 sdata->drop_unencrypted = 0;
3549
3550         bss->supp_rates_len = sband->n_bitrates;
3551         pos = bss->supp_rates;
3552         for (i = 0; i < sband->n_bitrates; i++) {
3553                 int rate = sband->bitrates[i].bitrate;
3554                 *pos++ = (u8) (rate / 5);
3555         }
3556
3557         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3558 }
3559
3560
3561 static int ieee80211_sta_find_ibss(struct net_device *dev,
3562                                    struct ieee80211_if_sta *ifsta)
3563 {
3564         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3565         struct ieee80211_sta_bss *bss;
3566         int found = 0;
3567         u8 bssid[ETH_ALEN];
3568         int active_ibss;
3569         DECLARE_MAC_BUF(mac);
3570         DECLARE_MAC_BUF(mac2);
3571
3572         if (ifsta->ssid_len == 0)
3573                 return -EINVAL;
3574
3575         active_ibss = ieee80211_sta_active_ibss(dev);
3576 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3577         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3578                dev->name, active_ibss);
3579 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3580         spin_lock_bh(&local->sta_bss_lock);
3581         list_for_each_entry(bss, &local->sta_bss_list, list) {
3582                 if (ifsta->ssid_len != bss->ssid_len ||
3583                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3584                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3585                         continue;
3586 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3587                 printk(KERN_DEBUG "   bssid=%s found\n",
3588                        print_mac(mac, bss->bssid));
3589 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3590                 memcpy(bssid, bss->bssid, ETH_ALEN);
3591                 found = 1;
3592                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3593                         break;
3594         }
3595         spin_unlock_bh(&local->sta_bss_lock);
3596
3597 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3598         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3599                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3600 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3601         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3602             (bss = ieee80211_rx_bss_get(dev, bssid,
3603                                         local->hw.conf.channel->center_freq,
3604                                         ifsta->ssid, ifsta->ssid_len))) {
3605                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3606                        " based on configured SSID\n",
3607                        dev->name, print_mac(mac, bssid));
3608                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3609         }
3610 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3611         printk(KERN_DEBUG "   did not try to join ibss\n");
3612 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3613
3614         /* Selected IBSS not found in current scan results - try to scan */
3615         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3616             !ieee80211_sta_active_ibss(dev)) {
3617                 mod_timer(&ifsta->timer, jiffies +
3618                                       IEEE80211_IBSS_MERGE_INTERVAL);
3619         } else if (time_after(jiffies, local->last_scan_completed +
3620                               IEEE80211_SCAN_INTERVAL)) {
3621                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3622                        "join\n", dev->name);
3623                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3624                                               ifsta->ssid_len);
3625         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3626                 int interval = IEEE80211_SCAN_INTERVAL;
3627
3628                 if (time_after(jiffies, ifsta->ibss_join_req +
3629                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3630                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3631                             (!(local->oper_channel->flags &
3632                                         IEEE80211_CHAN_NO_IBSS)))
3633                                 return ieee80211_sta_create_ibss(dev, ifsta);
3634                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3635                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3636                                        " %d MHz\n", dev->name,
3637                                        local->hw.conf.channel->center_freq);
3638                         }
3639
3640                         /* No IBSS found - decrease scan interval and continue
3641                          * scanning. */
3642                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3643                 }
3644
3645                 ifsta->state = IEEE80211_IBSS_SEARCH;
3646                 mod_timer(&ifsta->timer, jiffies + interval);
3647                 return 0;
3648         }
3649
3650         return 0;
3651 }
3652
3653
3654 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3655 {
3656         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3657         struct ieee80211_if_sta *ifsta;
3658
3659         if (len > IEEE80211_MAX_SSID_LEN)
3660                 return -EINVAL;
3661
3662         ifsta = &sdata->u.sta;
3663
3664         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3665                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3666         memcpy(ifsta->ssid, ssid, len);
3667         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3668         ifsta->ssid_len = len;
3669
3670         if (len)
3671                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3672         else
3673                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3674         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3675             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3676                 ifsta->ibss_join_req = jiffies;
3677                 ifsta->state = IEEE80211_IBSS_SEARCH;
3678                 return ieee80211_sta_find_ibss(dev, ifsta);
3679         }
3680         return 0;
3681 }
3682
3683
3684 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3685 {
3686         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3687         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3688         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3689         *len = ifsta->ssid_len;
3690         return 0;
3691 }
3692
3693
3694 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3695 {
3696         struct ieee80211_sub_if_data *sdata;
3697         struct ieee80211_if_sta *ifsta;
3698         int res;
3699
3700         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3701         ifsta = &sdata->u.sta;
3702
3703         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3704                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3705                 res = ieee80211_if_config(dev);
3706                 if (res) {
3707                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3708                                "the low-level driver\n", dev->name);
3709                         return res;
3710                 }
3711         }
3712
3713         if (is_valid_ether_addr(bssid))
3714                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3715         else
3716                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3717
3718         return 0;
3719 }
3720
3721
3722 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3723                                     struct ieee80211_sub_if_data *sdata,
3724                                     int powersave)
3725 {
3726         struct sk_buff *skb;
3727         struct ieee80211_hdr *nullfunc;
3728         u16 fc;
3729
3730         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3731         if (!skb) {
3732                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3733                        "frame\n", sdata->dev->name);
3734                 return;
3735         }
3736         skb_reserve(skb, local->hw.extra_tx_headroom);
3737
3738         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3739         memset(nullfunc, 0, 24);
3740         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3741              IEEE80211_FCTL_TODS;
3742         if (powersave)
3743                 fc |= IEEE80211_FCTL_PM;
3744         nullfunc->frame_control = cpu_to_le16(fc);
3745         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3746         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3747         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3748
3749         ieee80211_sta_tx(sdata->dev, skb, 0);
3750 }
3751
3752
3753 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3754 {
3755         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3756             ieee80211_vif_is_mesh(&sdata->vif))
3757                 ieee80211_sta_timer((unsigned long)sdata);
3758 }
3759
3760 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3761 {
3762         struct ieee80211_local *local = hw_to_local(hw);
3763         struct net_device *dev = local->scan_dev;
3764         struct ieee80211_sub_if_data *sdata;
3765         union iwreq_data wrqu;
3766
3767         local->last_scan_completed = jiffies;
3768         memset(&wrqu, 0, sizeof(wrqu));
3769         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3770
3771         if (local->sta_hw_scanning) {
3772                 local->sta_hw_scanning = 0;
3773                 if (ieee80211_hw_config(local))
3774                         printk(KERN_DEBUG "%s: failed to restore operational "
3775                                "channel after scan\n", dev->name);
3776                 /* Restart STA timer for HW scan case */
3777                 rcu_read_lock();
3778                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3779                         ieee80211_restart_sta_timer(sdata);
3780                 rcu_read_unlock();
3781
3782                 goto done;
3783         }
3784
3785         local->sta_sw_scanning = 0;
3786         if (ieee80211_hw_config(local))
3787                 printk(KERN_DEBUG "%s: failed to restore operational "
3788                        "channel after scan\n", dev->name);
3789
3790
3791         netif_tx_lock_bh(local->mdev);
3792         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3793         local->ops->configure_filter(local_to_hw(local),
3794                                      FIF_BCN_PRBRESP_PROMISC,
3795                                      &local->filter_flags,
3796                                      local->mdev->mc_count,
3797                                      local->mdev->mc_list);
3798
3799         netif_tx_unlock_bh(local->mdev);
3800
3801         rcu_read_lock();
3802         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3803
3804                 /* No need to wake the master device. */
3805                 if (sdata->dev == local->mdev)
3806                         continue;
3807
3808                 /* Tell AP we're back */
3809                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3810                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3811                         ieee80211_send_nullfunc(local, sdata, 0);
3812
3813                 ieee80211_restart_sta_timer(sdata);
3814
3815                 netif_wake_queue(sdata->dev);
3816         }
3817         rcu_read_unlock();
3818
3819 done:
3820         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3821         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3822                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3823                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3824                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3825                     !ieee80211_sta_active_ibss(dev)))
3826                         ieee80211_sta_find_ibss(dev, ifsta);
3827         }
3828 }
3829 EXPORT_SYMBOL(ieee80211_scan_completed);
3830
3831 void ieee80211_sta_scan_work(struct work_struct *work)
3832 {
3833         struct ieee80211_local *local =
3834                 container_of(work, struct ieee80211_local, scan_work.work);
3835         struct net_device *dev = local->scan_dev;
3836         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3837         struct ieee80211_supported_band *sband;
3838         struct ieee80211_channel *chan;
3839         int skip;
3840         unsigned long next_delay = 0;
3841
3842         if (!local->sta_sw_scanning)
3843                 return;
3844
3845         switch (local->scan_state) {
3846         case SCAN_SET_CHANNEL:
3847                 /*
3848                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3849                  * after we successfully scanned the last channel of the last
3850                  * band (and the last band is supported by the hw)
3851                  */
3852                 if (local->scan_band < IEEE80211_NUM_BANDS)
3853                         sband = local->hw.wiphy->bands[local->scan_band];
3854                 else
3855                         sband = NULL;
3856
3857                 /*
3858                  * If we are at an unsupported band and have more bands
3859                  * left to scan, advance to the next supported one.
3860                  */
3861                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3862                         local->scan_band++;
3863                         sband = local->hw.wiphy->bands[local->scan_band];
3864                         local->scan_channel_idx = 0;
3865                 }
3866
3867                 /* if no more bands/channels left, complete scan */
3868                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3869                         ieee80211_scan_completed(local_to_hw(local));
3870                         return;
3871                 }
3872                 skip = 0;
3873                 chan = &sband->channels[local->scan_channel_idx];
3874
3875                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3876                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3877                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3878                         skip = 1;
3879
3880                 if (!skip) {
3881                         local->scan_channel = chan;
3882                         if (ieee80211_hw_config(local)) {
3883                                 printk(KERN_DEBUG "%s: failed to set freq to "
3884                                        "%d MHz for scan\n", dev->name,
3885                                        chan->center_freq);
3886                                 skip = 1;
3887                         }
3888                 }
3889
3890                 /* advance state machine to next channel/band */
3891                 local->scan_channel_idx++;
3892                 if (local->scan_channel_idx >= sband->n_channels) {
3893                         /*
3894                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3895                          * we'll catch that case above and complete the scan
3896                          * if that is the case.
3897                          */
3898                         local->scan_band++;
3899                         local->scan_channel_idx = 0;
3900                 }
3901
3902                 if (skip)
3903                         break;
3904
3905                 next_delay = IEEE80211_PROBE_DELAY +
3906                              usecs_to_jiffies(local->hw.channel_change_time);
3907                 local->scan_state = SCAN_SEND_PROBE;
3908                 break;
3909         case SCAN_SEND_PROBE:
3910                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3911                 local->scan_state = SCAN_SET_CHANNEL;
3912
3913                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3914                         break;
3915                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3916                                          local->scan_ssid_len);
3917                 next_delay = IEEE80211_CHANNEL_TIME;
3918                 break;
3919         }
3920
3921         if (local->sta_sw_scanning)
3922                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3923                                    next_delay);
3924 }
3925
3926
3927 static int ieee80211_sta_start_scan(struct net_device *dev,
3928                                     u8 *ssid, size_t ssid_len)
3929 {
3930         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3931         struct ieee80211_sub_if_data *sdata;
3932
3933         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3934                 return -EINVAL;
3935
3936         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3937          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3938          * BSSID: MACAddress
3939          * SSID
3940          * ScanType: ACTIVE, PASSIVE
3941          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3942          *    a Probe frame during active scanning
3943          * ChannelList
3944          * MinChannelTime (>= ProbeDelay), in TU
3945          * MaxChannelTime: (>= MinChannelTime), in TU
3946          */
3947
3948          /* MLME-SCAN.confirm
3949           * BSSDescriptionSet
3950           * ResultCode: SUCCESS, INVALID_PARAMETERS
3951          */
3952
3953         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3954                 if (local->scan_dev == dev)
3955                         return 0;
3956                 return -EBUSY;
3957         }
3958
3959         if (local->ops->hw_scan) {
3960                 int rc = local->ops->hw_scan(local_to_hw(local),
3961                                              ssid, ssid_len);
3962                 if (!rc) {
3963                         local->sta_hw_scanning = 1;
3964                         local->scan_dev = dev;
3965                 }
3966                 return rc;
3967         }
3968
3969         local->sta_sw_scanning = 1;
3970
3971         rcu_read_lock();
3972         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3973
3974                 /* Don't stop the master interface, otherwise we can't transmit
3975                  * probes! */
3976                 if (sdata->dev == local->mdev)
3977                         continue;
3978
3979                 netif_stop_queue(sdata->dev);
3980                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3981                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3982                         ieee80211_send_nullfunc(local, sdata, 1);
3983         }
3984         rcu_read_unlock();
3985
3986         if (ssid) {
3987                 local->scan_ssid_len = ssid_len;
3988                 memcpy(local->scan_ssid, ssid, ssid_len);
3989         } else
3990                 local->scan_ssid_len = 0;
3991         local->scan_state = SCAN_SET_CHANNEL;
3992         local->scan_channel_idx = 0;
3993         local->scan_band = IEEE80211_BAND_2GHZ;
3994         local->scan_dev = dev;
3995
3996         netif_tx_lock_bh(local->mdev);
3997         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3998         local->ops->configure_filter(local_to_hw(local),
3999                                      FIF_BCN_PRBRESP_PROMISC,
4000                                      &local->filter_flags,
4001                                      local->mdev->mc_count,
4002                                      local->mdev->mc_list);
4003         netif_tx_unlock_bh(local->mdev);
4004
4005         /* TODO: start scan as soon as all nullfunc frames are ACKed */
4006         queue_delayed_work(local->hw.workqueue, &local->scan_work,
4007                            IEEE80211_CHANNEL_TIME);
4008
4009         return 0;
4010 }
4011
4012
4013 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4014 {
4015         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4016         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4017         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4018
4019         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4020                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4021
4022         if (local->sta_sw_scanning || local->sta_hw_scanning) {
4023                 if (local->scan_dev == dev)
4024                         return 0;
4025                 return -EBUSY;
4026         }
4027
4028         ifsta->scan_ssid_len = ssid_len;
4029         if (ssid_len)
4030                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4031         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4032         queue_work(local->hw.workqueue, &ifsta->work);
4033         return 0;
4034 }
4035
4036 static char *
4037 ieee80211_sta_scan_result(struct net_device *dev,
4038                           struct ieee80211_sta_bss *bss,
4039                           char *current_ev, char *end_buf)
4040 {
4041         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4042         struct iw_event iwe;
4043
4044         if (time_after(jiffies,
4045                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4046                 return current_ev;
4047
4048         memset(&iwe, 0, sizeof(iwe));
4049         iwe.cmd = SIOCGIWAP;
4050         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4051         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4052         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4053                                           IW_EV_ADDR_LEN);
4054
4055         memset(&iwe, 0, sizeof(iwe));
4056         iwe.cmd = SIOCGIWESSID;
4057         if (bss_mesh_cfg(bss)) {
4058                 iwe.u.data.length = bss_mesh_id_len(bss);
4059                 iwe.u.data.flags = 1;
4060                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4061                                                   bss_mesh_id(bss));
4062         } else {
4063                 iwe.u.data.length = bss->ssid_len;
4064                 iwe.u.data.flags = 1;
4065                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4066                                                   bss->ssid);
4067         }
4068
4069         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4070             || bss_mesh_cfg(bss)) {
4071                 memset(&iwe, 0, sizeof(iwe));
4072                 iwe.cmd = SIOCGIWMODE;
4073                 if (bss_mesh_cfg(bss))
4074                         iwe.u.mode = IW_MODE_MESH;
4075                 else if (bss->capability & WLAN_CAPABILITY_ESS)
4076                         iwe.u.mode = IW_MODE_MASTER;
4077                 else
4078                         iwe.u.mode = IW_MODE_ADHOC;
4079                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4080                                                   IW_EV_UINT_LEN);
4081         }
4082
4083         memset(&iwe, 0, sizeof(iwe));
4084         iwe.cmd = SIOCGIWFREQ;
4085         iwe.u.freq.m = bss->freq;
4086         iwe.u.freq.e = 6;
4087         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4088                                           IW_EV_FREQ_LEN);
4089
4090         memset(&iwe, 0, sizeof(iwe));
4091         iwe.cmd = SIOCGIWFREQ;
4092         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4093         iwe.u.freq.e = 0;
4094         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4095                                           IW_EV_FREQ_LEN);
4096
4097         memset(&iwe, 0, sizeof(iwe));
4098         iwe.cmd = IWEVQUAL;
4099         iwe.u.qual.qual = bss->qual;
4100         iwe.u.qual.level = bss->signal;
4101         iwe.u.qual.noise = bss->noise;
4102         iwe.u.qual.updated = local->wstats_flags;
4103         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4104                                           IW_EV_QUAL_LEN);
4105
4106         memset(&iwe, 0, sizeof(iwe));
4107         iwe.cmd = SIOCGIWENCODE;
4108         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4109                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4110         else
4111                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4112         iwe.u.data.length = 0;
4113         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4114
4115         if (bss && bss->wpa_ie) {
4116                 memset(&iwe, 0, sizeof(iwe));
4117                 iwe.cmd = IWEVGENIE;
4118                 iwe.u.data.length = bss->wpa_ie_len;
4119                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4120                                                   bss->wpa_ie);
4121         }
4122
4123         if (bss && bss->rsn_ie) {
4124                 memset(&iwe, 0, sizeof(iwe));
4125                 iwe.cmd = IWEVGENIE;
4126                 iwe.u.data.length = bss->rsn_ie_len;
4127                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4128                                                   bss->rsn_ie);
4129         }
4130
4131         if (bss && bss->supp_rates_len > 0) {
4132                 /* display all supported rates in readable format */
4133                 char *p = current_ev + IW_EV_LCP_LEN;
4134                 int i;
4135
4136                 memset(&iwe, 0, sizeof(iwe));
4137                 iwe.cmd = SIOCGIWRATE;
4138                 /* Those two flags are ignored... */
4139                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4140
4141                 for (i = 0; i < bss->supp_rates_len; i++) {
4142                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4143                                                         0x7f) * 500000);
4144                         p = iwe_stream_add_value(current_ev, p,
4145                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4146                 }
4147                 current_ev = p;
4148         }
4149
4150         if (bss) {
4151                 char *buf;
4152                 buf = kmalloc(30, GFP_ATOMIC);
4153                 if (buf) {
4154                         memset(&iwe, 0, sizeof(iwe));
4155                         iwe.cmd = IWEVCUSTOM;
4156                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4157                         iwe.u.data.length = strlen(buf);
4158                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4159                                                           &iwe, buf);
4160                         kfree(buf);
4161                 }
4162         }
4163
4164         if (bss_mesh_cfg(bss)) {
4165                 char *buf;
4166                 u8 *cfg = bss_mesh_cfg(bss);
4167                 buf = kmalloc(50, GFP_ATOMIC);
4168                 if (buf) {
4169                         memset(&iwe, 0, sizeof(iwe));
4170                         iwe.cmd = IWEVCUSTOM;
4171                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4172                         iwe.u.data.length = strlen(buf);
4173                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4174                                                           &iwe, buf);
4175                         sprintf(buf, "Path Selection Protocol ID: "
4176                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4177                                                         cfg[4]);
4178                         iwe.u.data.length = strlen(buf);
4179                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4180                                                           &iwe, buf);
4181                         sprintf(buf, "Path Selection Metric ID: "
4182                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4183                                                         cfg[8]);
4184                         iwe.u.data.length = strlen(buf);
4185                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4186                                                           &iwe, buf);
4187                         sprintf(buf, "Congestion Control Mode ID: "
4188                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4189                                                         cfg[11], cfg[12]);
4190                         iwe.u.data.length = strlen(buf);
4191                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4192                                                           &iwe, buf);
4193                         sprintf(buf, "Channel Precedence: "
4194                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4195                                                         cfg[15], cfg[16]);
4196                         iwe.u.data.length = strlen(buf);
4197                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4198                                                           &iwe, buf);
4199                         kfree(buf);
4200                 }
4201         }
4202
4203         return current_ev;
4204 }
4205
4206
4207 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4208 {
4209         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4210         char *current_ev = buf;
4211         char *end_buf = buf + len;
4212         struct ieee80211_sta_bss *bss;
4213
4214         spin_lock_bh(&local->sta_bss_lock);
4215         list_for_each_entry(bss, &local->sta_bss_list, list) {
4216                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4217                         spin_unlock_bh(&local->sta_bss_lock);
4218                         return -E2BIG;
4219                 }
4220                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4221                                                        end_buf);
4222         }
4223         spin_unlock_bh(&local->sta_bss_lock);
4224         return current_ev - buf;
4225 }
4226
4227
4228 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4229 {
4230         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4231         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4232
4233         kfree(ifsta->extra_ie);
4234         if (len == 0) {
4235                 ifsta->extra_ie = NULL;
4236                 ifsta->extra_ie_len = 0;
4237                 return 0;
4238         }
4239         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4240         if (!ifsta->extra_ie) {
4241                 ifsta->extra_ie_len = 0;
4242                 return -ENOMEM;
4243         }
4244         memcpy(ifsta->extra_ie, ie, len);
4245         ifsta->extra_ie_len = len;
4246         return 0;
4247 }
4248
4249
4250 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4251                                         struct sk_buff *skb, u8 *bssid,
4252                                         u8 *addr)
4253 {
4254         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4255         struct sta_info *sta;
4256         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4257         DECLARE_MAC_BUF(mac);
4258
4259         /* TODO: Could consider removing the least recently used entry and
4260          * allow new one to be added. */
4261         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4262                 if (net_ratelimit()) {
4263                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4264                                "entry %s\n", dev->name, print_mac(mac, addr));
4265                 }
4266                 return NULL;
4267         }
4268
4269         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4270                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4271
4272         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4273         if (!sta)
4274                 return NULL;
4275
4276         set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4277
4278         sta->supp_rates[local->hw.conf.channel->band] =
4279                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4280
4281         rate_control_rate_init(sta, local);
4282
4283         if (sta_info_insert(sta))
4284                 return NULL;
4285
4286         return sta;
4287 }
4288
4289
4290 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4291 {
4292         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4293         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4294
4295         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4296                dev->name, reason);
4297
4298         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4299             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4300                 return -EINVAL;
4301
4302         ieee80211_send_deauth(dev, ifsta, reason);
4303         ieee80211_set_disassoc(dev, ifsta, 1);
4304         return 0;
4305 }
4306
4307
4308 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4309 {
4310         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4311         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4312
4313         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4314                dev->name, reason);
4315
4316         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4317                 return -EINVAL;
4318
4319         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4320                 return -1;
4321
4322         ieee80211_send_disassoc(dev, ifsta, reason);
4323         ieee80211_set_disassoc(dev, ifsta, 0);
4324         return 0;
4325 }
4326
4327 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4328                           enum ieee80211_notification_types  notif_type)
4329 {
4330         struct ieee80211_local *local = hw_to_local(hw);
4331         struct ieee80211_sub_if_data *sdata;
4332
4333         switch (notif_type) {
4334         case IEEE80211_NOTIFY_RE_ASSOC:
4335                 rcu_read_lock();
4336                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4337
4338                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4339                                 ieee80211_sta_req_auth(sdata->dev,
4340                                                        &sdata->u.sta);
4341                         }
4342
4343                 }
4344                 rcu_read_unlock();
4345                 break;
4346         }
4347 }
4348 EXPORT_SYMBOL(ieee80211_notify_mac);