Pileus Git - ~andy/linux/blob - net/mac80211/ieee80211_sta.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 <net/iw_handler.h>
  28 #include <asm/types.h>
  29
  30 #include <net/mac80211.h>
  31 #include "ieee80211_i.h"
  32 #include "ieee80211_rate.h"
  33 #include "ieee80211_led.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  36 #define IEEE80211_AUTH_MAX_TRIES 3
  37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  38 #define IEEE80211_ASSOC_MAX_TRIES 3
  39 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  40 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  41 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  42 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  43 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  44 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  45
  46 #define IEEE80211_PROBE_DELAY (HZ / 33)
  47 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  48 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  49 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  50 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  51 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  52
  53 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  54
  55
  56 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  57
  58 #define ERP_INFO_USE_PROTECTION BIT(1)
  59
  60 /* mgmt header + 1 byte action code */
  61 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  62
  63 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  64 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  65 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  66 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  67 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  68
  69 /* next values represent the buffer size for A-MPDU frame.
  70  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  71 #define IEEE80211_MIN_AMPDU_BUF 0x8
  72 #define IEEE80211_MAX_AMPDU_BUF 0x40
  73
  74 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  75                                      u8 *ssid, size_t ssid_len);
  76 static struct ieee80211_sta_bss *
  77 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
  78                      u8 *ssid, u8 ssid_len);
  79 static void ieee80211_rx_bss_put(struct net_device *dev,
  80                                  struct ieee80211_sta_bss *bss);
  81 static int ieee80211_sta_find_ibss(struct net_device *dev,
  82                                    struct ieee80211_if_sta *ifsta);
  83 static int ieee80211_sta_wep_configured(struct net_device *dev);
  84 static int ieee80211_sta_start_scan(struct net_device *dev,
  85                                     u8 *ssid, size_t ssid_len);
  86 static int ieee80211_sta_config_auth(struct net_device *dev,
  87                                      struct ieee80211_if_sta *ifsta);
  88
  89
  90 /* Parsed Information Elements */
  91 struct ieee802_11_elems {
  92         /* pointers to IEs */
  93         u8 *ssid;
  94         u8 *supp_rates;
  95         u8 *fh_params;
  96         u8 *ds_params;
  97         u8 *cf_params;
  98         u8 *tim;
  99         u8 *ibss_params;
 100         u8 *challenge;
 101         u8 *wpa;
 102         u8 *rsn;
 103         u8 *erp_info;
 104         u8 *ext_supp_rates;
 105         u8 *wmm_info;
 106         u8 *wmm_param;
 107         u8 *ht_cap_elem;
 108         u8 *ht_info_elem;
 109         /* length of them, respectively */
 110         u8 ssid_len;
 111         u8 supp_rates_len;
 112         u8 fh_params_len;
 113         u8 ds_params_len;
 114         u8 cf_params_len;
 115         u8 tim_len;
 116         u8 ibss_params_len;
 117         u8 challenge_len;
 118         u8 wpa_len;
 119         u8 rsn_len;
 120         u8 erp_info_len;
 121         u8 ext_supp_rates_len;
 122         u8 wmm_info_len;
 123         u8 wmm_param_len;
 124         u8 ht_cap_elem_len;
 125         u8 ht_info_elem_len;
 126 };
 127
 128 static void ieee802_11_parse_elems(u8 *start, size_t len,
 129                                    struct ieee802_11_elems *elems)
 130 {
 131         size_t left = len;
 132         u8 *pos = start;
 133
 134         memset(elems, 0, sizeof(*elems));
 135
 136         while (left >= 2) {
 137                 u8 id, elen;
 138
 139                 id = *pos++;
 140                 elen = *pos++;
 141                 left -= 2;
 142
 143                 if (elen > left)
 144                         return;
 145
 146                 switch (id) {
 147                 case WLAN_EID_SSID:
 148                         elems->ssid = pos;
 149                         elems->ssid_len = elen;
 150                         break;
 151                 case WLAN_EID_SUPP_RATES:
 152                         elems->supp_rates = pos;
 153                         elems->supp_rates_len = elen;
 154                         break;
 155                 case WLAN_EID_FH_PARAMS:
 156                         elems->fh_params = pos;
 157                         elems->fh_params_len = elen;
 158                         break;
 159                 case WLAN_EID_DS_PARAMS:
 160                         elems->ds_params = pos;
 161                         elems->ds_params_len = elen;
 162                         break;
 163                 case WLAN_EID_CF_PARAMS:
 164                         elems->cf_params = pos;
 165                         elems->cf_params_len = elen;
 166                         break;
 167                 case WLAN_EID_TIM:
 168                         elems->tim = pos;
 169                         elems->tim_len = elen;
 170                         break;
 171                 case WLAN_EID_IBSS_PARAMS:
 172                         elems->ibss_params = pos;
 173                         elems->ibss_params_len = elen;
 174                         break;
 175                 case WLAN_EID_CHALLENGE:
 176                         elems->challenge = pos;
 177                         elems->challenge_len = elen;
 178                         break;
 179                 case WLAN_EID_WPA:
 180                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 181                             pos[2] == 0xf2) {
 182                                 /* Microsoft OUI (00:50:F2) */
 183                                 if (pos[3] == 1) {
 184                                         /* OUI Type 1 - WPA IE */
 185                                         elems->wpa = pos;
 186                                         elems->wpa_len = elen;
 187                                 } else if (elen >= 5 && pos[3] == 2) {
 188                                         if (pos[4] == 0) {
 189                                                 elems->wmm_info = pos;
 190                                                 elems->wmm_info_len = elen;
 191                                         } else if (pos[4] == 1) {
 192                                                 elems->wmm_param = pos;
 193                                                 elems->wmm_param_len = elen;
 194                                         }
 195                                 }
 196                         }
 197                         break;
 198                 case WLAN_EID_RSN:
 199                         elems->rsn = pos;
 200                         elems->rsn_len = elen;
 201                         break;
 202                 case WLAN_EID_ERP_INFO:
 203                         elems->erp_info = pos;
 204                         elems->erp_info_len = elen;
 205                         break;
 206                 case WLAN_EID_EXT_SUPP_RATES:
 207                         elems->ext_supp_rates = pos;
 208                         elems->ext_supp_rates_len = elen;
 209                         break;
 210                 case WLAN_EID_HT_CAPABILITY:
 211                         elems->ht_cap_elem = pos;
 212                         elems->ht_cap_elem_len = elen;
 213                         break;
 214                 case WLAN_EID_HT_EXTRA_INFO:
 215                         elems->ht_info_elem = pos;
 216                         elems->ht_info_elem_len = elen;
 217                         break;
 218                 default:
 219                         break;
 220                 }
 221
 222                 left -= elen;
 223                 pos += elen;
 224         }
 225 }
 226
 227
 228 static int ecw2cw(int ecw)
 229 {
 230         int cw = 1;
 231         while (ecw > 0) {
 232                 cw <<= 1;
 233                 ecw--;
 234         }
 235         return cw - 1;
 236 }
 237
 238 static void ieee80211_sta_wmm_params(struct net_device *dev,
 239                                      struct ieee80211_if_sta *ifsta,
 240                                      u8 *wmm_param, size_t wmm_param_len)
 241 {
 242         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 243         struct ieee80211_tx_queue_params params;
 244         size_t left;
 245         int count;
 246         u8 *pos;
 247
 248         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 249                 return;
 250         count = wmm_param[6] & 0x0f;
 251         if (count == ifsta->wmm_last_param_set)
 252                 return;
 253         ifsta->wmm_last_param_set = count;
 254
 255         pos = wmm_param + 8;
 256         left = wmm_param_len - 8;
 257
 258         memset(&params, 0, sizeof(params));
 259
 260         if (!local->ops->conf_tx)
 261                 return;
 262
 263         local->wmm_acm = 0;
 264         for (; left >= 4; left -= 4, pos += 4) {
 265                 int aci = (pos[0] >> 5) & 0x03;
 266                 int acm = (pos[0] >> 4) & 0x01;
 267                 int queue;
 268
 269                 switch (aci) {
 270                 case 1:
 271                         queue = IEEE80211_TX_QUEUE_DATA3;
 272                         if (acm) {
 273                                 local->wmm_acm |= BIT(0) | BIT(3);
 274                         }
 275                         break;
 276                 case 2:
 277                         queue = IEEE80211_TX_QUEUE_DATA1;
 278                         if (acm) {
 279                                 local->wmm_acm |= BIT(4) | BIT(5);
 280                         }
 281                         break;
 282                 case 3:
 283                         queue = IEEE80211_TX_QUEUE_DATA0;
 284                         if (acm) {
 285                                 local->wmm_acm |= BIT(6) | BIT(7);
 286                         }
 287                         break;
 288                 case 0:
 289                 default:
 290                         queue = IEEE80211_TX_QUEUE_DATA2;
 291                         if (acm) {
 292                                 local->wmm_acm |= BIT(1) | BIT(2);
 293                         }
 294                         break;
 295                 }
 296
 297                 params.aifs = pos[0] & 0x0f;
 298                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 299                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 300                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 301                 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 302                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 303                        "cWmin=%d cWmax=%d burst=%d\n",
 304                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 305                        params.cw_max, params.burst_time);
 306                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 307                  * AC for now) */
 308                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 309                         printk(KERN_DEBUG "%s: failed to set TX queue "
 310                                "parameters for queue %d\n", dev->name, queue);
 311                 }
 312         }
 313 }
 314
 315
 316 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 317                                    u8 erp_value)
 318 {
 319         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 320         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 321         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 322         bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 323         DECLARE_MAC_BUF(mac);
 324         u32 changed = 0;
 325
 326         if (use_protection != bss_conf->use_cts_prot) {
 327                 if (net_ratelimit()) {
 328                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 329                                "%s)\n",
 330                                sdata->dev->name,
 331                                use_protection ? "enabled" : "disabled",
 332                                print_mac(mac, ifsta->bssid));
 333                 }
 334                 bss_conf->use_cts_prot = use_protection;
 335                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 336         }
 337
 338         if (preamble_mode != bss_conf->use_short_preamble) {
 339                 if (net_ratelimit()) {
 340                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 341                                " (BSSID=%s)\n",
 342                                sdata->dev->name,
 343                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 344                                         "short" : "long",
 345                                print_mac(mac, ifsta->bssid));
 346                 }
 347                 bss_conf->use_short_preamble = preamble_mode;
 348                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 349         }
 350
 351         return changed;
 352 }
 353
 354 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 355                                    struct ieee80211_ht_info *ht_info)
 356 {
 357
 358         if (ht_info == NULL)
 359                 return -EINVAL;
 360
 361         memset(ht_info, 0, sizeof(*ht_info));
 362
 363         if (ht_cap_ie) {
 364                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 365
 366                 ht_info->ht_supported = 1;
 367                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 368                 ht_info->ampdu_factor =
 369                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 370                 ht_info->ampdu_density =
 371                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 372                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 373         } else
 374                 ht_info->ht_supported = 0;
 375
 376         return 0;
 377 }
 378
 379 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 380                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 381                         struct ieee80211_ht_bss_info *bss_info)
 382 {
 383         if (bss_info == NULL)
 384                 return -EINVAL;
 385
 386         memset(bss_info, 0, sizeof(*bss_info));
 387
 388         if (ht_add_info_ie) {
 389                 u16 op_mode;
 390                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 391
 392                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 393                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 394                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 395         }
 396
 397         return 0;
 398 }
 399
 400 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 401                                          struct ieee80211_if_sta *ifsta)
 402 {
 403         char *buf;
 404         size_t len;
 405         int i;
 406         union iwreq_data wrqu;
 407
 408         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 409                 return;
 410
 411         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 412                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 413         if (!buf)
 414                 return;
 415
 416         len = sprintf(buf, "ASSOCINFO(");
 417         if (ifsta->assocreq_ies) {
 418                 len += sprintf(buf + len, "ReqIEs=");
 419                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 420                         len += sprintf(buf + len, "%02x",
 421                                        ifsta->assocreq_ies[i]);
 422                 }
 423         }
 424         if (ifsta->assocresp_ies) {
 425                 if (ifsta->assocreq_ies)
 426                         len += sprintf(buf + len, " ");
 427                 len += sprintf(buf + len, "RespIEs=");
 428                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 429                         len += sprintf(buf + len, "%02x",
 430                                        ifsta->assocresp_ies[i]);
 431                 }
 432         }
 433         len += sprintf(buf + len, ")");
 434
 435         if (len > IW_CUSTOM_MAX) {
 436                 len = sprintf(buf, "ASSOCRESPIE=");
 437                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 438                         len += sprintf(buf + len, "%02x",
 439                                        ifsta->assocresp_ies[i]);
 440                 }
 441         }
 442
 443         memset(&wrqu, 0, sizeof(wrqu));
 444         wrqu.data.length = len;
 445         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 446
 447         kfree(buf);
 448 }
 449
 450
 451 static void ieee80211_set_associated(struct net_device *dev,
 452                                      struct ieee80211_if_sta *ifsta,
 453                                      bool assoc)
 454 {
 455         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 456         struct ieee80211_local *local = sdata->local;
 457         union iwreq_data wrqu;
 458         u32 changed = BSS_CHANGED_ASSOC;
 459
 460         if (assoc) {
 461                 struct ieee80211_sta_bss *bss;
 462
 463                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 464
 465                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 466                         return;
 467
 468                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 469                                            local->hw.conf.channel,
 470                                            ifsta->ssid, ifsta->ssid_len);
 471                 if (bss) {
 472                         if (bss->has_erp_value)
 473                                 changed |= ieee80211_handle_erp_ie(
 474                                                 sdata, bss->erp_value);
 475                         ieee80211_rx_bss_put(dev, bss);
 476                 }
 477
 478                 netif_carrier_on(dev);
 479                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 480                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 481                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 482                 ieee80211_sta_send_associnfo(dev, ifsta);
 483         } else {
 484                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 485
 486                 netif_carrier_off(dev);
 487                 ieee80211_reset_erp_info(dev);
 488                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 489         }
 490         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 491         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 492         ifsta->last_probe = jiffies;
 493         ieee80211_led_assoc(local, assoc);
 494
 495         sdata->bss_conf.assoc = assoc;
 496         ieee80211_bss_info_change_notify(sdata, changed);
 497 }
 498
 499 static void ieee80211_set_disassoc(struct net_device *dev,
 500                                    struct ieee80211_if_sta *ifsta, int deauth)
 501 {
 502         if (deauth)
 503                 ifsta->auth_tries = 0;
 504         ifsta->assoc_tries = 0;
 505         ieee80211_set_associated(dev, ifsta, 0);
 506 }
 507
 508 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 509                              int encrypt)
 510 {
 511         struct ieee80211_sub_if_data *sdata;
 512         struct ieee80211_tx_packet_data *pkt_data;
 513
 514         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 515         skb->dev = sdata->local->mdev;
 516         skb_set_mac_header(skb, 0);
 517         skb_set_network_header(skb, 0);
 518         skb_set_transport_header(skb, 0);
 519
 520         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 521         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 522         pkt_data->ifindex = sdata->dev->ifindex;
 523         if (!encrypt)
 524                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 525
 526         dev_queue_xmit(skb);
 527 }
 528
 529
 530 static void ieee80211_send_auth(struct net_device *dev,
 531                                 struct ieee80211_if_sta *ifsta,
 532                                 int transaction, u8 *extra, size_t extra_len,
 533                                 int encrypt)
 534 {
 535         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 536         struct sk_buff *skb;
 537         struct ieee80211_mgmt *mgmt;
 538
 539         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 540                             sizeof(*mgmt) + 6 + extra_len);
 541         if (!skb) {
 542                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 543                        "frame\n", dev->name);
 544                 return;
 545         }
 546         skb_reserve(skb, local->hw.extra_tx_headroom);
 547
 548         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 549         memset(mgmt, 0, 24 + 6);
 550         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 551                                            IEEE80211_STYPE_AUTH);
 552         if (encrypt)
 553                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 554         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 555         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 556         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 557         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 558         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 559         ifsta->auth_transaction = transaction + 1;
 560         mgmt->u.auth.status_code = cpu_to_le16(0);
 561         if (extra)
 562                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 563
 564         ieee80211_sta_tx(dev, skb, encrypt);
 565 }
 566
 567
 568 static void ieee80211_authenticate(struct net_device *dev,
 569                                    struct ieee80211_if_sta *ifsta)
 570 {
 571         DECLARE_MAC_BUF(mac);
 572
 573         ifsta->auth_tries++;
 574         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 575                 printk(KERN_DEBUG "%s: authentication with AP %s"
 576                        " timed out\n",
 577                        dev->name, print_mac(mac, ifsta->bssid));
 578                 ifsta->state = IEEE80211_DISABLED;
 579                 return;
 580         }
 581
 582         ifsta->state = IEEE80211_AUTHENTICATE;
 583         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 584                dev->name, print_mac(mac, ifsta->bssid));
 585
 586         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 587
 588         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 589 }
 590
 591
 592 static void ieee80211_send_assoc(struct net_device *dev,
 593                                  struct ieee80211_if_sta *ifsta)
 594 {
 595         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 596         struct ieee80211_hw_mode *mode;
 597         struct sk_buff *skb;
 598         struct ieee80211_mgmt *mgmt;
 599         u8 *pos, *ies;
 600         int i, len;
 601         u16 capab;
 602         struct ieee80211_sta_bss *bss;
 603         int wmm = 0;
 604
 605         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 606                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 607                             ifsta->ssid_len);
 608         if (!skb) {
 609                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 610                        "frame\n", dev->name);
 611                 return;
 612         }
 613         skb_reserve(skb, local->hw.extra_tx_headroom);
 614
 615         mode = local->oper_hw_mode;
 616         capab = ifsta->capab;
 617         if (mode->mode == MODE_IEEE80211G) {
 618                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 619                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 620         }
 621         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 622                                    ifsta->ssid, ifsta->ssid_len);
 623         if (bss) {
 624                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 625                         capab |= WLAN_CAPABILITY_PRIVACY;
 626                 if (bss->wmm_ie) {
 627                         wmm = 1;
 628                 }
 629                 ieee80211_rx_bss_put(dev, bss);
 630         }
 631
 632         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 633         memset(mgmt, 0, 24);
 634         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 635         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 636         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 637
 638         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 639                 skb_put(skb, 10);
 640                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 641                                                    IEEE80211_STYPE_REASSOC_REQ);
 642                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 643                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 644                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 645                        ETH_ALEN);
 646         } else {
 647                 skb_put(skb, 4);
 648                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 649                                                    IEEE80211_STYPE_ASSOC_REQ);
 650                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 651                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 652         }
 653
 654         /* SSID */
 655         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 656         *pos++ = WLAN_EID_SSID;
 657         *pos++ = ifsta->ssid_len;
 658         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 659
 660         len = mode->num_rates;
 661         if (len > 8)
 662                 len = 8;
 663         pos = skb_put(skb, len + 2);
 664         *pos++ = WLAN_EID_SUPP_RATES;
 665         *pos++ = len;
 666         for (i = 0; i < len; i++) {
 667                 int rate = mode->rates[i].rate;
 668                 *pos++ = (u8) (rate / 5);
 669         }
 670
 671         if (mode->num_rates > len) {
 672                 pos = skb_put(skb, mode->num_rates - len + 2);
 673                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 674                 *pos++ = mode->num_rates - len;
 675                 for (i = len; i < mode->num_rates; i++) {
 676                         int rate = mode->rates[i].rate;
 677                         *pos++ = (u8) (rate / 5);
 678                 }
 679         }
 680
 681         if (ifsta->extra_ie) {
 682                 pos = skb_put(skb, ifsta->extra_ie_len);
 683                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 684         }
 685
 686         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 687                 pos = skb_put(skb, 9);
 688                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 689                 *pos++ = 7; /* len */
 690                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 691                 *pos++ = 0x50;
 692                 *pos++ = 0xf2;
 693                 *pos++ = 2; /* WME */
 694                 *pos++ = 0; /* WME info */
 695                 *pos++ = 1; /* WME ver */
 696                 *pos++ = 0;
 697         }
 698         /* wmm support is a must to HT */
 699         if (wmm && mode->ht_info.ht_supported) {
 700                 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
 701                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 702                 *pos++ = WLAN_EID_HT_CAPABILITY;
 703                 *pos++ = sizeof(struct ieee80211_ht_cap);
 704                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 705                 memcpy(pos, &tmp, sizeof(u16));
 706                 pos += sizeof(u16);
 707                 *pos++ = (mode->ht_info.ampdu_factor |
 708                                 (mode->ht_info.ampdu_density << 2));
 709                 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
 710         }
 711
 712         kfree(ifsta->assocreq_ies);
 713         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 714         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 715         if (ifsta->assocreq_ies)
 716                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 717
 718         ieee80211_sta_tx(dev, skb, 0);
 719 }
 720
 721
 722 static void ieee80211_send_deauth(struct net_device *dev,
 723                                   struct ieee80211_if_sta *ifsta, u16 reason)
 724 {
 725         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 726         struct sk_buff *skb;
 727         struct ieee80211_mgmt *mgmt;
 728
 729         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 730         if (!skb) {
 731                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 732                        "frame\n", dev->name);
 733                 return;
 734         }
 735         skb_reserve(skb, local->hw.extra_tx_headroom);
 736
 737         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 738         memset(mgmt, 0, 24);
 739         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 740         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 741         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 742         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 743                                            IEEE80211_STYPE_DEAUTH);
 744         skb_put(skb, 2);
 745         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 746
 747         ieee80211_sta_tx(dev, skb, 0);
 748 }
 749
 750
 751 static void ieee80211_send_disassoc(struct net_device *dev,
 752                                     struct ieee80211_if_sta *ifsta, u16 reason)
 753 {
 754         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 755         struct sk_buff *skb;
 756         struct ieee80211_mgmt *mgmt;
 757
 758         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 759         if (!skb) {
 760                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 761                        "frame\n", dev->name);
 762                 return;
 763         }
 764         skb_reserve(skb, local->hw.extra_tx_headroom);
 765
 766         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 767         memset(mgmt, 0, 24);
 768         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 769         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 770         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 771         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 772                                            IEEE80211_STYPE_DISASSOC);
 773         skb_put(skb, 2);
 774         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 775
 776         ieee80211_sta_tx(dev, skb, 0);
 777 }
 778
 779
 780 static int ieee80211_privacy_mismatch(struct net_device *dev,
 781                                       struct ieee80211_if_sta *ifsta)
 782 {
 783         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 784         struct ieee80211_sta_bss *bss;
 785         int bss_privacy;
 786         int wep_privacy;
 787         int privacy_invoked;
 788
 789         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 790                 return 0;
 791
 792         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 793                                    ifsta->ssid, ifsta->ssid_len);
 794         if (!bss)
 795                 return 0;
 796
 797         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 798         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 799         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 800
 801         ieee80211_rx_bss_put(dev, bss);
 802
 803         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 804                 return 0;
 805
 806         return 1;
 807 }
 808
 809
 810 static void ieee80211_associate(struct net_device *dev,
 811                                 struct ieee80211_if_sta *ifsta)
 812 {
 813         DECLARE_MAC_BUF(mac);
 814
 815         ifsta->assoc_tries++;
 816         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 817                 printk(KERN_DEBUG "%s: association with AP %s"
 818                        " timed out\n",
 819                        dev->name, print_mac(mac, ifsta->bssid));
 820                 ifsta->state = IEEE80211_DISABLED;
 821                 return;
 822         }
 823
 824         ifsta->state = IEEE80211_ASSOCIATE;
 825         printk(KERN_DEBUG "%s: associate with AP %s\n",
 826                dev->name, print_mac(mac, ifsta->bssid));
 827         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 828                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 829                        "mixed-cell disabled - abort association\n", dev->name);
 830                 ifsta->state = IEEE80211_DISABLED;
 831                 return;
 832         }
 833
 834         ieee80211_send_assoc(dev, ifsta);
 835
 836         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 837 }
 838
 839
 840 static void ieee80211_associated(struct net_device *dev,
 841                                  struct ieee80211_if_sta *ifsta)
 842 {
 843         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 844         struct sta_info *sta;
 845         int disassoc;
 846         DECLARE_MAC_BUF(mac);
 847
 848         /* TODO: start monitoring current AP signal quality and number of
 849          * missed beacons. Scan other channels every now and then and search
 850          * for better APs. */
 851         /* TODO: remove expired BSSes */
 852
 853         ifsta->state = IEEE80211_ASSOCIATED;
 854
 855         sta = sta_info_get(local, ifsta->bssid);
 856         if (!sta) {
 857                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 858                        dev->name, print_mac(mac, ifsta->bssid));
 859                 disassoc = 1;
 860         } else {
 861                 disassoc = 0;
 862                 if (time_after(jiffies,
 863                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 864                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 865                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 866                                        "current AP %s - assume out of "
 867                                        "range\n",
 868                                        dev->name, print_mac(mac, ifsta->bssid));
 869                                 disassoc = 1;
 870                                 sta_info_free(sta);
 871                         } else
 872                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 873                                                          local->scan_ssid,
 874                                                          local->scan_ssid_len);
 875                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 876                 } else {
 877                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 878                         if (time_after(jiffies, ifsta->last_probe +
 879                                        IEEE80211_PROBE_INTERVAL)) {
 880                                 ifsta->last_probe = jiffies;
 881                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 882                                                          ifsta->ssid,
 883                                                          ifsta->ssid_len);
 884                         }
 885                 }
 886                 sta_info_put(sta);
 887         }
 888         if (disassoc) {
 889                 ifsta->state = IEEE80211_DISABLED;
 890                 ieee80211_set_associated(dev, ifsta, 0);
 891         } else {
 892                 mod_timer(&ifsta->timer, jiffies +
 893                                       IEEE80211_MONITORING_INTERVAL);
 894         }
 895 }
 896
 897
 898 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 899                                      u8 *ssid, size_t ssid_len)
 900 {
 901         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 902         struct ieee80211_hw_mode *mode;
 903         struct sk_buff *skb;
 904         struct ieee80211_mgmt *mgmt;
 905         u8 *pos, *supp_rates, *esupp_rates = NULL;
 906         int i;
 907
 908         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 909         if (!skb) {
 910                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 911                        "request\n", dev->name);
 912                 return;
 913         }
 914         skb_reserve(skb, local->hw.extra_tx_headroom);
 915
 916         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 917         memset(mgmt, 0, 24);
 918         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 919                                            IEEE80211_STYPE_PROBE_REQ);
 920         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 921         if (dst) {
 922                 memcpy(mgmt->da, dst, ETH_ALEN);
 923                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 924         } else {
 925                 memset(mgmt->da, 0xff, ETH_ALEN);
 926                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 927         }
 928         pos = skb_put(skb, 2 + ssid_len);
 929         *pos++ = WLAN_EID_SSID;
 930         *pos++ = ssid_len;
 931         memcpy(pos, ssid, ssid_len);
 932
 933         supp_rates = skb_put(skb, 2);
 934         supp_rates[0] = WLAN_EID_SUPP_RATES;
 935         supp_rates[1] = 0;
 936         mode = local->oper_hw_mode;
 937         for (i = 0; i < mode->num_rates; i++) {
 938                 struct ieee80211_rate *rate = &mode->rates[i];
 939                 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
 940                         continue;
 941                 if (esupp_rates) {
 942                         pos = skb_put(skb, 1);
 943                         esupp_rates[1]++;
 944                 } else if (supp_rates[1] == 8) {
 945                         esupp_rates = skb_put(skb, 3);
 946                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 947                         esupp_rates[1] = 1;
 948                         pos = &esupp_rates[2];
 949                 } else {
 950                         pos = skb_put(skb, 1);
 951                         supp_rates[1]++;
 952                 }
 953                 *pos = rate->rate / 5;
 954         }
 955
 956         ieee80211_sta_tx(dev, skb, 0);
 957 }
 958
 959
 960 static int ieee80211_sta_wep_configured(struct net_device *dev)
 961 {
 962         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 963         if (!sdata || !sdata->default_key ||
 964             sdata->default_key->conf.alg != ALG_WEP)
 965                 return 0;
 966         return 1;
 967 }
 968
 969
 970 static void ieee80211_auth_completed(struct net_device *dev,
 971                                      struct ieee80211_if_sta *ifsta)
 972 {
 973         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 974         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 975         ieee80211_associate(dev, ifsta);
 976 }
 977
 978
 979 static void ieee80211_auth_challenge(struct net_device *dev,
 980                                      struct ieee80211_if_sta *ifsta,
 981                                      struct ieee80211_mgmt *mgmt,
 982                                      size_t len)
 983 {
 984         u8 *pos;
 985         struct ieee802_11_elems elems;
 986
 987         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 988         pos = mgmt->u.auth.variable;
 989         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 990         if (!elems.challenge) {
 991                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 992                        "frame\n", dev->name);
 993                 return;
 994         }
 995         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 996                             elems.challenge_len + 2, 1);
 997 }
 998
 999 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1000                                         u8 dialog_token, u16 status, u16 policy,
1001                                         u16 buf_size, u16 timeout)
1002 {
1003         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1005         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1006         struct sk_buff *skb;
1007         struct ieee80211_mgmt *mgmt;
1008         u16 capab;
1009
1010         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1011                                         sizeof(mgmt->u.action.u.addba_resp));
1012         if (!skb) {
1013                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1014                        "for addba resp frame\n", dev->name);
1015                 return;
1016         }
1017
1018         skb_reserve(skb, local->hw.extra_tx_headroom);
1019         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1020         memset(mgmt, 0, 24);
1021         memcpy(mgmt->da, da, ETH_ALEN);
1022         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1023         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1024                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1025         else
1026                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1027         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1028                                            IEEE80211_STYPE_ACTION);
1029
1030         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1031         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1032         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1033         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1034
1035         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1036         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1037         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1038
1039         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1040         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1041         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1042
1043         ieee80211_sta_tx(dev, skb, 0);
1044
1045         return;
1046 }
1047
1048 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1049                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1050                                 u16 agg_size, u16 timeout)
1051 {
1052         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1053         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1054         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1055         struct sk_buff *skb;
1056         struct ieee80211_mgmt *mgmt;
1057         u16 capab;
1058
1059         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1060                                 sizeof(mgmt->u.action.u.addba_req));
1061
1062
1063         if (!skb) {
1064                 printk(KERN_ERR "%s: failed to allocate buffer "
1065                                 "for addba request frame\n", dev->name);
1066                 return;
1067         }
1068         skb_reserve(skb, local->hw.extra_tx_headroom);
1069         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1070         memset(mgmt, 0, 24);
1071         memcpy(mgmt->da, da, ETH_ALEN);
1072         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1073         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1074                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1075         else
1076                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1077
1078         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1079                                         IEEE80211_STYPE_ACTION);
1080
1081         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1082
1083         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1084         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1085
1086         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1087         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1088         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1089         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1090
1091         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1092
1093         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1094         mgmt->u.action.u.addba_req.start_seq_num =
1095                                         cpu_to_le16(start_seq_num << 4);
1096
1097         ieee80211_sta_tx(dev, skb, 0);
1098 }
1099
1100 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1101                                                 struct ieee80211_mgmt *mgmt,
1102                                                 size_t len)
1103 {
1104         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1105         struct ieee80211_hw *hw = &local->hw;
1106         struct ieee80211_conf *conf = &hw->conf;
1107         struct sta_info *sta;
1108         struct tid_ampdu_rx *tid_agg_rx;
1109         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1110         u8 dialog_token;
1111         int ret = -EOPNOTSUPP;
1112         DECLARE_MAC_BUF(mac);
1113
1114         sta = sta_info_get(local, mgmt->sa);
1115         if (!sta)
1116                 return;
1117
1118         /* extract session parameters from addba request frame */
1119         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1120         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1121         start_seq_num =
1122                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1123
1124         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1125         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1126         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1127         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1128
1129         status = WLAN_STATUS_REQUEST_DECLINED;
1130
1131         /* sanity check for incoming parameters:
1132          * check if configuration can support the BA policy
1133          * and if buffer size does not exceeds max value */
1134         if (((ba_policy != 1)
1135                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1136                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1137                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1138 #ifdef CONFIG_MAC80211_HT_DEBUG
1139                 if (net_ratelimit())
1140                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1141                                 "%s on tid %u. policy %d, buffer size %d\n",
1142                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1143                                 buf_size);
1144 #endif /* CONFIG_MAC80211_HT_DEBUG */
1145                 goto end_no_lock;
1146         }
1147         /* determine default buffer size */
1148         if (buf_size == 0) {
1149                 struct ieee80211_hw_mode *mode = conf->mode;
1150                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1151                 buf_size = buf_size << mode->ht_info.ampdu_factor;
1152         }
1153
1154         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1155
1156         /* examine state machine */
1157         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1158
1159         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1160 #ifdef CONFIG_MAC80211_HT_DEBUG
1161                 if (net_ratelimit())
1162                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1163                                 "%s on tid %u\n",
1164                                 print_mac(mac, mgmt->sa), tid);
1165 #endif /* CONFIG_MAC80211_HT_DEBUG */
1166                 goto end;
1167         }
1168
1169         /* prepare reordering buffer */
1170         tid_agg_rx->reorder_buf =
1171                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1172         if (!tid_agg_rx->reorder_buf) {
1173                 if (net_ratelimit())
1174                         printk(KERN_ERR "can not allocate reordering buffer "
1175                                "to tid %d\n", tid);
1176                 goto end;
1177         }
1178         memset(tid_agg_rx->reorder_buf, 0,
1179                 buf_size * sizeof(struct sk_buf *));
1180
1181         if (local->ops->ampdu_action)
1182                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1183                                                sta->addr, tid, &start_seq_num);
1184 #ifdef CONFIG_MAC80211_HT_DEBUG
1185         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1186 #endif /* CONFIG_MAC80211_HT_DEBUG */
1187
1188         if (ret) {
1189                 kfree(tid_agg_rx->reorder_buf);
1190                 goto end;
1191         }
1192
1193         /* change state and send addba resp */
1194         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1195         tid_agg_rx->dialog_token = dialog_token;
1196         tid_agg_rx->ssn = start_seq_num;
1197         tid_agg_rx->head_seq_num = start_seq_num;
1198         tid_agg_rx->buf_size = buf_size;
1199         tid_agg_rx->timeout = timeout;
1200         tid_agg_rx->stored_mpdu_num = 0;
1201         status = WLAN_STATUS_SUCCESS;
1202 end:
1203         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1204
1205 end_no_lock:
1206         ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1207                                 status, 1, buf_size, timeout);
1208         sta_info_put(sta);
1209 }
1210
1211 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1212                                              struct ieee80211_mgmt *mgmt,
1213                                              size_t len)
1214 {
1215         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1216         struct ieee80211_hw *hw = &local->hw;
1217         struct sta_info *sta;
1218         u16 capab;
1219         u16 tid;
1220         u8 *state;
1221
1222         sta = sta_info_get(local, mgmt->sa);
1223         if (!sta)
1224                 return;
1225
1226         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1227         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1228
1229         state = &sta->ampdu_mlme.tid_tx[tid].state;
1230
1231         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1232
1233         if (mgmt->u.action.u.addba_resp.dialog_token !=
1234                 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1235                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1236 #ifdef CONFIG_MAC80211_HT_DEBUG
1237                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1238 #endif /* CONFIG_MAC80211_HT_DEBUG */
1239                 sta_info_put(sta);
1240                 return;
1241         }
1242
1243         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1244 #ifdef CONFIG_MAC80211_HT_DEBUG
1245         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1246 #endif /* CONFIG_MAC80211_HT_DEBUG */
1247         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1248                         == WLAN_STATUS_SUCCESS) {
1249                 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1250                         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1251                         printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1252                                 "%d\n", *state);
1253                         sta_info_put(sta);
1254                         return;
1255                 }
1256
1257                 if (*state & HT_ADDBA_RECEIVED_MSK)
1258                         printk(KERN_DEBUG "double addBA response\n");
1259
1260                 *state |= HT_ADDBA_RECEIVED_MSK;
1261                 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1262
1263                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1264                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1265                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1266                 }
1267
1268                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1269                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1270         } else {
1271                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1272
1273                 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1274                 /* this will allow the state check in stop_BA_session */
1275                 *state = HT_AGG_STATE_OPERATIONAL;
1276                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1277                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1278                                              WLAN_BACK_INITIATOR);
1279         }
1280         sta_info_put(sta);
1281 }
1282
1283 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1284                           u16 initiator, u16 reason_code)
1285 {
1286         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1287         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1288         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1289         struct sk_buff *skb;
1290         struct ieee80211_mgmt *mgmt;
1291         u16 params;
1292
1293         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1294                                         sizeof(mgmt->u.action.u.delba));
1295
1296         if (!skb) {
1297                 printk(KERN_ERR "%s: failed to allocate buffer "
1298                                         "for delba frame\n", dev->name);
1299                 return;
1300         }
1301
1302         skb_reserve(skb, local->hw.extra_tx_headroom);
1303         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1304         memset(mgmt, 0, 24);
1305         memcpy(mgmt->da, da, ETH_ALEN);
1306         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1307         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1308                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1309         else
1310                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1311         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1312                                         IEEE80211_STYPE_ACTION);
1313
1314         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1315
1316         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1317         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1318         params = (u16)(initiator << 11);        /* bit 11 initiator */
1319         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1320
1321         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1322         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1323
1324         ieee80211_sta_tx(dev, skb, 0);
1325 }
1326
1327 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1328                                         u16 initiator, u16 reason)
1329 {
1330         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1331         struct ieee80211_hw *hw = &local->hw;
1332         struct sta_info *sta;
1333         int ret, i;
1334
1335         sta = sta_info_get(local, ra);
1336         if (!sta)
1337                 return;
1338
1339         /* check if TID is in operational state */
1340         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1341         if (sta->ampdu_mlme.tid_rx[tid].state
1342                                 != HT_AGG_STATE_OPERATIONAL) {
1343                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1344                 sta_info_put(sta);
1345                 return;
1346         }
1347         sta->ampdu_mlme.tid_rx[tid].state =
1348                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1349                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1350                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1351
1352         /* stop HW Rx aggregation. ampdu_action existence
1353          * already verified in session init so we add the BUG_ON */
1354         BUG_ON(!local->ops->ampdu_action);
1355
1356         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1357                                         ra, tid, NULL);
1358         if (ret)
1359                 printk(KERN_DEBUG "HW problem - can not stop rx "
1360                                 "aggergation for tid %d\n", tid);
1361
1362         /* shutdown timer has not expired */
1363         if (initiator != WLAN_BACK_TIMER)
1364                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1365                                         session_timer);
1366
1367         /* check if this is a self generated aggregation halt */
1368         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1369                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1370
1371         /* free the reordering buffer */
1372         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1373                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1374                         /* release the reordered frames */
1375                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1376                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1377                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1378                 }
1379         }
1380         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1381
1382         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1383         sta_info_put(sta);
1384 }
1385
1386
1387 static void ieee80211_sta_process_delba(struct net_device *dev,
1388                         struct ieee80211_mgmt *mgmt, size_t len)
1389 {
1390         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1391         struct sta_info *sta;
1392         u16 tid, params;
1393         u16 initiator;
1394         DECLARE_MAC_BUF(mac);
1395
1396         sta = sta_info_get(local, mgmt->sa);
1397         if (!sta)
1398                 return;
1399
1400         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1401         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1402         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1403
1404 #ifdef CONFIG_MAC80211_HT_DEBUG
1405         if (net_ratelimit())
1406                 printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n",
1407                         print_mac(mac, mgmt->sa), tid,
1408                         mgmt->u.action.u.delba.reason_code);
1409 #endif /* CONFIG_MAC80211_HT_DEBUG */
1410
1411         if (initiator == WLAN_BACK_INITIATOR)
1412                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1413                                                  WLAN_BACK_INITIATOR, 0);
1414         sta_info_put(sta);
1415 }
1416
1417 /*
1418  * After sending add Block Ack request we activated a timer until
1419  * add Block Ack response will arrive from the recipient.
1420  * If this timer expires sta_addba_resp_timer_expired will be executed.
1421  */
1422 void sta_addba_resp_timer_expired(unsigned long data)
1423 {
1424         /* not an elegant detour, but there is no choice as the timer passes
1425          * only one argument, and both sta_info and TID are needed, so init
1426          * flow in sta_info_add gives the TID as data, while the timer_to_id
1427          * array gives the sta through container_of */
1428         u16 tid = *(int *)data;
1429         struct sta_info *temp_sta = container_of((void *)data,
1430                 struct sta_info, timer_to_tid[tid]);
1431
1432         struct ieee80211_local *local = temp_sta->local;
1433         struct ieee80211_hw *hw = &local->hw;
1434         struct sta_info *sta;
1435         u8 *state;
1436
1437         sta = sta_info_get(local, temp_sta->addr);
1438         if (!sta)
1439                 return;
1440
1441         state = &sta->ampdu_mlme.tid_tx[tid].state;
1442         /* check if the TID waits for addBA response */
1443         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1444         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1445                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1446                 *state = HT_AGG_STATE_IDLE;
1447                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1448                                 "expecting addBA response there", tid);
1449                 goto timer_expired_exit;
1450         }
1451
1452         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1453
1454         /* go through the state check in stop_BA_session */
1455         *state = HT_AGG_STATE_OPERATIONAL;
1456         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1457         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1458                                      WLAN_BACK_INITIATOR);
1459
1460 timer_expired_exit:
1461         sta_info_put(sta);
1462 }
1463
1464 /*
1465  * After receiving Block Ack Request (BAR) we activated a
1466  * timer after each frame arrives from the originator.
1467  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1468  */
1469 void sta_rx_agg_session_timer_expired(unsigned long data)
1470 {
1471         /* not an elegant detour, but there is no choice as the timer passes
1472          * only one argument, and verious sta_info are needed here, so init
1473          * flow in sta_info_add gives the TID as data, while the timer_to_id
1474          * array gives the sta through container_of */
1475         u8 *ptid = (u8 *)data;
1476         u8 *timer_to_id = ptid - *ptid;
1477         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1478                                          timer_to_tid[0]);
1479
1480         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1481         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1482                                          WLAN_BACK_TIMER,
1483                                          WLAN_REASON_QSTA_TIMEOUT);
1484 }
1485
1486
1487 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1488                                    struct ieee80211_if_sta *ifsta,
1489                                    struct ieee80211_mgmt *mgmt,
1490                                    size_t len)
1491 {
1492         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1493         u16 auth_alg, auth_transaction, status_code;
1494         DECLARE_MAC_BUF(mac);
1495
1496         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1497             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1498                 printk(KERN_DEBUG "%s: authentication frame received from "
1499                        "%s, but not in authenticate state - ignored\n",
1500                        dev->name, print_mac(mac, mgmt->sa));
1501                 return;
1502         }
1503
1504         if (len < 24 + 6) {
1505                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1506                        "received from %s - ignored\n",
1507                        dev->name, len, print_mac(mac, mgmt->sa));
1508                 return;
1509         }
1510
1511         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1512             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1513                 printk(KERN_DEBUG "%s: authentication frame received from "
1514                        "unknown AP (SA=%s BSSID=%s) - "
1515                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1516                        print_mac(mac, mgmt->bssid));
1517                 return;
1518         }
1519
1520         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1521             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1522                 printk(KERN_DEBUG "%s: authentication frame received from "
1523                        "unknown BSSID (SA=%s BSSID=%s) - "
1524                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1525                        print_mac(mac, mgmt->bssid));
1526                 return;
1527         }
1528
1529         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1530         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1531         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1532
1533         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1534                "transaction=%d status=%d)\n",
1535                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1536                auth_transaction, status_code);
1537
1538         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1539                 /* IEEE 802.11 standard does not require authentication in IBSS
1540                  * networks and most implementations do not seem to use it.
1541                  * However, try to reply to authentication attempts if someone
1542                  * has actually implemented this.
1543                  * TODO: Could implement shared key authentication. */
1544                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1545                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1546                                "frame (alg=%d transaction=%d)\n",
1547                                dev->name, auth_alg, auth_transaction);
1548                         return;
1549                 }
1550                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1551         }
1552
1553         if (auth_alg != ifsta->auth_alg ||
1554             auth_transaction != ifsta->auth_transaction) {
1555                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1556                        "(alg=%d transaction=%d)\n",
1557                        dev->name, auth_alg, auth_transaction);
1558                 return;
1559         }
1560
1561         if (status_code != WLAN_STATUS_SUCCESS) {
1562                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1563                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1564                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1565                         u8 algs[3];
1566                         const int num_algs = ARRAY_SIZE(algs);
1567                         int i, pos;
1568                         algs[0] = algs[1] = algs[2] = 0xff;
1569                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1570                                 algs[0] = WLAN_AUTH_OPEN;
1571                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1572                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1573                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1574                                 algs[2] = WLAN_AUTH_LEAP;
1575                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1576                                 pos = 0;
1577                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1578                                 pos = 1;
1579                         else
1580                                 pos = 2;
1581                         for (i = 0; i < num_algs; i++) {
1582                                 pos++;
1583                                 if (pos >= num_algs)
1584                                         pos = 0;
1585                                 if (algs[pos] == ifsta->auth_alg ||
1586                                     algs[pos] == 0xff)
1587                                         continue;
1588                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1589                                     !ieee80211_sta_wep_configured(dev))
1590                                         continue;
1591                                 ifsta->auth_alg = algs[pos];
1592                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1593                                        "next try\n",
1594                                        dev->name, ifsta->auth_alg);
1595                                 break;
1596                         }
1597                 }
1598                 return;
1599         }
1600
1601         switch (ifsta->auth_alg) {
1602         case WLAN_AUTH_OPEN:
1603         case WLAN_AUTH_LEAP:
1604                 ieee80211_auth_completed(dev, ifsta);
1605                 break;
1606         case WLAN_AUTH_SHARED_KEY:
1607                 if (ifsta->auth_transaction == 4)
1608                         ieee80211_auth_completed(dev, ifsta);
1609                 else
1610                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1611                 break;
1612         }
1613 }
1614
1615
1616 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1617                                      struct ieee80211_if_sta *ifsta,
1618                                      struct ieee80211_mgmt *mgmt,
1619                                      size_t len)
1620 {
1621         u16 reason_code;
1622         DECLARE_MAC_BUF(mac);
1623
1624         if (len < 24 + 2) {
1625                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1626                        "received from %s - ignored\n",
1627                        dev->name, len, print_mac(mac, mgmt->sa));
1628                 return;
1629         }
1630
1631         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1632                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1633                        "unknown AP (SA=%s BSSID=%s) - "
1634                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1635                        print_mac(mac, mgmt->bssid));
1636                 return;
1637         }
1638
1639         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1640
1641         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1642                " (reason=%d)\n",
1643                dev->name, print_mac(mac, mgmt->sa), reason_code);
1644
1645         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1646                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1647         }
1648
1649         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1650             ifsta->state == IEEE80211_ASSOCIATE ||
1651             ifsta->state == IEEE80211_ASSOCIATED) {
1652                 ifsta->state = IEEE80211_AUTHENTICATE;
1653                 mod_timer(&ifsta->timer, jiffies +
1654                                       IEEE80211_RETRY_AUTH_INTERVAL);
1655         }
1656
1657         ieee80211_set_disassoc(dev, ifsta, 1);
1658         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1659 }
1660
1661
1662 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1663                                        struct ieee80211_if_sta *ifsta,
1664                                        struct ieee80211_mgmt *mgmt,
1665                                        size_t len)
1666 {
1667         u16 reason_code;
1668         DECLARE_MAC_BUF(mac);
1669
1670         if (len < 24 + 2) {
1671                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1672                        "received from %s - ignored\n",
1673                        dev->name, len, print_mac(mac, mgmt->sa));
1674                 return;
1675         }
1676
1677         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1678                 printk(KERN_DEBUG "%s: disassociation frame received from "
1679                        "unknown AP (SA=%s BSSID=%s) - "
1680                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1681                        print_mac(mac, mgmt->bssid));
1682                 return;
1683         }
1684
1685         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1686
1687         printk(KERN_DEBUG "%s: RX disassociation from %s"
1688                " (reason=%d)\n",
1689                dev->name, print_mac(mac, mgmt->sa), reason_code);
1690
1691         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1692                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1693
1694         if (ifsta->state == IEEE80211_ASSOCIATED) {
1695                 ifsta->state = IEEE80211_ASSOCIATE;
1696                 mod_timer(&ifsta->timer, jiffies +
1697                                       IEEE80211_RETRY_AUTH_INTERVAL);
1698         }
1699
1700         ieee80211_set_disassoc(dev, ifsta, 0);
1701 }
1702
1703
1704 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1705                                          struct ieee80211_if_sta *ifsta,
1706                                          struct ieee80211_mgmt *mgmt,
1707                                          size_t len,
1708                                          int reassoc)
1709 {
1710         struct ieee80211_local *local = sdata->local;
1711         struct net_device *dev = sdata->dev;
1712         struct ieee80211_hw_mode *mode;
1713         struct sta_info *sta;
1714         u32 rates;
1715         u16 capab_info, status_code, aid;
1716         struct ieee802_11_elems elems;
1717         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1718         u8 *pos;
1719         int i, j;
1720         DECLARE_MAC_BUF(mac);
1721
1722         /* AssocResp and ReassocResp have identical structure, so process both
1723          * of them in this function. */
1724
1725         if (ifsta->state != IEEE80211_ASSOCIATE) {
1726                 printk(KERN_DEBUG "%s: association frame received from "
1727                        "%s, but not in associate state - ignored\n",
1728                        dev->name, print_mac(mac, mgmt->sa));
1729                 return;
1730         }
1731
1732         if (len < 24 + 6) {
1733                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1734                        "received from %s - ignored\n",
1735                        dev->name, len, print_mac(mac, mgmt->sa));
1736                 return;
1737         }
1738
1739         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1740                 printk(KERN_DEBUG "%s: association frame received from "
1741                        "unknown AP (SA=%s BSSID=%s) - "
1742                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1743                        print_mac(mac, mgmt->bssid));
1744                 return;
1745         }
1746
1747         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1748         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1749         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1750
1751         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1752                "status=%d aid=%d)\n",
1753                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1754                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1755
1756         if (status_code != WLAN_STATUS_SUCCESS) {
1757                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1758                        dev->name, status_code);
1759                 /* if this was a reassociation, ensure we try a "full"
1760                  * association next time. This works around some broken APs
1761                  * which do not correctly reject reassociation requests. */
1762                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1763                 return;
1764         }
1765
1766         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1767                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1768                        "set\n", dev->name, aid);
1769         aid &= ~(BIT(15) | BIT(14));
1770
1771         pos = mgmt->u.assoc_resp.variable;
1772         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1773
1774         if (!elems.supp_rates) {
1775                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1776                        dev->name);
1777                 return;
1778         }
1779
1780         printk(KERN_DEBUG "%s: associated\n", dev->name);
1781         ifsta->aid = aid;
1782         ifsta->ap_capab = capab_info;
1783
1784         kfree(ifsta->assocresp_ies);
1785         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1786         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1787         if (ifsta->assocresp_ies)
1788                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1789
1790         /* set AID, ieee80211_set_associated() will tell the driver */
1791         bss_conf->aid = aid;
1792         ieee80211_set_associated(dev, ifsta, 1);
1793
1794         /* Add STA entry for the AP */
1795         sta = sta_info_get(local, ifsta->bssid);
1796         if (!sta) {
1797                 struct ieee80211_sta_bss *bss;
1798                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1799                 if (!sta) {
1800                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1801                                " AP\n", dev->name);
1802                         return;
1803                 }
1804                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1805                                            local->hw.conf.channel,
1806                                            ifsta->ssid, ifsta->ssid_len);
1807                 if (bss) {
1808                         sta->last_rssi = bss->rssi;
1809                         sta->last_signal = bss->signal;
1810                         sta->last_noise = bss->noise;
1811                         ieee80211_rx_bss_put(dev, bss);
1812                 }
1813         }
1814
1815         sta->dev = dev;
1816         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1817
1818         rates = 0;
1819         mode = local->oper_hw_mode;
1820         for (i = 0; i < elems.supp_rates_len; i++) {
1821                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1822                 for (j = 0; j < mode->num_rates; j++)
1823                         if (mode->rates[j].rate == rate)
1824                                 rates |= BIT(j);
1825         }
1826         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1827                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1828                 for (j = 0; j < mode->num_rates; j++)
1829                         if (mode->rates[j].rate == rate)
1830                                 rates |= BIT(j);
1831         }
1832         sta->supp_rates = rates;
1833
1834         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1835             local->ops->conf_ht) {
1836                 struct ieee80211_ht_bss_info bss_info;
1837
1838                 ieee80211_ht_cap_ie_to_ht_info(
1839                                 (struct ieee80211_ht_cap *)
1840                                 elems.ht_cap_elem, &sta->ht_info);
1841                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1842                                 (struct ieee80211_ht_addt_info *)
1843                                 elems.ht_info_elem, &bss_info);
1844                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1845         }
1846
1847         rate_control_rate_init(sta, local);
1848
1849         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1850                 sta->flags |= WLAN_STA_WME;
1851                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1852                                          elems.wmm_param_len);
1853         }
1854
1855
1856         sta_info_put(sta);
1857
1858         ieee80211_associated(dev, ifsta);
1859 }
1860
1861
1862 /* Caller must hold local->sta_bss_lock */
1863 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1864                                         struct ieee80211_sta_bss *bss)
1865 {
1866         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1867         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1868         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1869 }
1870
1871
1872 /* Caller must hold local->sta_bss_lock */
1873 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1874                                         struct ieee80211_sta_bss *bss)
1875 {
1876         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1877         struct ieee80211_sta_bss *b, *prev = NULL;
1878         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1879         while (b) {
1880                 if (b == bss) {
1881                         if (!prev)
1882                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1883                                         bss->hnext;
1884                         else
1885                                 prev->hnext = bss->hnext;
1886                         break;
1887                 }
1888                 prev = b;
1889                 b = b->hnext;
1890         }
1891 }
1892
1893
1894 static struct ieee80211_sta_bss *
1895 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1896                      u8 *ssid, u8 ssid_len)
1897 {
1898         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1899         struct ieee80211_sta_bss *bss;
1900
1901         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1902         if (!bss)
1903                 return NULL;
1904         atomic_inc(&bss->users);
1905         atomic_inc(&bss->users);
1906         memcpy(bss->bssid, bssid, ETH_ALEN);
1907         bss->channel = channel;
1908         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1909                 memcpy(bss->ssid, ssid, ssid_len);
1910                 bss->ssid_len = ssid_len;
1911         }
1912
1913         spin_lock_bh(&local->sta_bss_lock);
1914         /* TODO: order by RSSI? */
1915         list_add_tail(&bss->list, &local->sta_bss_list);
1916         __ieee80211_rx_bss_hash_add(dev, bss);
1917         spin_unlock_bh(&local->sta_bss_lock);
1918         return bss;
1919 }
1920
1921
1922 static struct ieee80211_sta_bss *
1923 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1924                      u8 *ssid, u8 ssid_len)
1925 {
1926         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1927         struct ieee80211_sta_bss *bss;
1928
1929         spin_lock_bh(&local->sta_bss_lock);
1930         bss = local->sta_bss_hash[STA_HASH(bssid)];
1931         while (bss) {
1932                 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1933                     bss->channel == channel &&
1934                     bss->ssid_len == ssid_len &&
1935                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1936                         atomic_inc(&bss->users);
1937                         break;
1938                 }
1939                 bss = bss->hnext;
1940         }
1941         spin_unlock_bh(&local->sta_bss_lock);
1942         return bss;
1943 }
1944
1945
1946 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1947 {
1948         kfree(bss->wpa_ie);
1949         kfree(bss->rsn_ie);
1950         kfree(bss->wmm_ie);
1951         kfree(bss->ht_ie);
1952         kfree(bss);
1953 }
1954
1955
1956 static void ieee80211_rx_bss_put(struct net_device *dev,
1957                                  struct ieee80211_sta_bss *bss)
1958 {
1959         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1960         if (!atomic_dec_and_test(&bss->users))
1961                 return;
1962
1963         spin_lock_bh(&local->sta_bss_lock);
1964         __ieee80211_rx_bss_hash_del(dev, bss);
1965         list_del(&bss->list);
1966         spin_unlock_bh(&local->sta_bss_lock);
1967         ieee80211_rx_bss_free(bss);
1968 }
1969
1970
1971 void ieee80211_rx_bss_list_init(struct net_device *dev)
1972 {
1973         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1974         spin_lock_init(&local->sta_bss_lock);
1975         INIT_LIST_HEAD(&local->sta_bss_list);
1976 }
1977
1978
1979 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1980 {
1981         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1982         struct ieee80211_sta_bss *bss, *tmp;
1983
1984         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1985                 ieee80211_rx_bss_put(dev, bss);
1986 }
1987
1988
1989 static void ieee80211_rx_bss_info(struct net_device *dev,
1990                                   struct ieee80211_mgmt *mgmt,
1991                                   size_t len,
1992                                   struct ieee80211_rx_status *rx_status,
1993                                   int beacon)
1994 {
1995         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1996         struct ieee802_11_elems elems;
1997         size_t baselen;
1998         int channel, clen;
1999         struct ieee80211_sta_bss *bss;
2000         struct sta_info *sta;
2001         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2002         u64 timestamp;
2003         DECLARE_MAC_BUF(mac);
2004         DECLARE_MAC_BUF(mac2);
2005
2006         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2007                 return; /* ignore ProbeResp to foreign address */
2008
2009 #if 0
2010         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2011                dev->name, beacon ? "Beacon" : "Probe Response",
2012                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2013 #endif
2014
2015         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2016         if (baselen > len)
2017                 return;
2018
2019         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2020
2021         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2022             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2023 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2024                 static unsigned long last_tsf_debug = 0;
2025                 u64 tsf;
2026                 if (local->ops->get_tsf)
2027                         tsf = local->ops->get_tsf(local_to_hw(local));
2028                 else
2029                         tsf = -1LLU;
2030                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
2031                         printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2032                                "%s TSF=0x%llx BCN=0x%llx diff=%lld "
2033                                "@%lu\n",
2034                                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
2035                                (unsigned long long)tsf,
2036                                (unsigned long long)timestamp,
2037                                (unsigned long long)(tsf - timestamp),
2038                                jiffies);
2039                         last_tsf_debug = jiffies;
2040                 }
2041 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2042         }
2043
2044         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2045
2046         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2047             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2048             (sta = sta_info_get(local, mgmt->sa))) {
2049                 struct ieee80211_hw_mode *mode;
2050                 struct ieee80211_rate *rates;
2051                 size_t num_rates;
2052                 u32 supp_rates, prev_rates;
2053                 int i, j;
2054
2055                 mode = local->sta_sw_scanning ?
2056                        local->scan_hw_mode : local->oper_hw_mode;
2057
2058                 if (local->sta_hw_scanning) {
2059                         /* search for the correct mode matches the beacon */
2060                         list_for_each_entry(mode, &local->modes_list, list)
2061                                 if (mode->mode == rx_status->phymode)
2062                                         break;
2063
2064                         if (mode == NULL)
2065                                 mode = local->oper_hw_mode;
2066                 }
2067                 rates = mode->rates;
2068                 num_rates = mode->num_rates;
2069
2070                 supp_rates = 0;
2071                 for (i = 0; i < elems.supp_rates_len +
2072                              elems.ext_supp_rates_len; i++) {
2073                         u8 rate = 0;
2074                         int own_rate;
2075                         if (i < elems.supp_rates_len)
2076                                 rate = elems.supp_rates[i];
2077                         else if (elems.ext_supp_rates)
2078                                 rate = elems.ext_supp_rates
2079                                         [i - elems.supp_rates_len];
2080                         own_rate = 5 * (rate & 0x7f);
2081                         for (j = 0; j < num_rates; j++)
2082                                 if (rates[j].rate == own_rate)
2083                                         supp_rates |= BIT(j);
2084                 }
2085
2086                 prev_rates = sta->supp_rates;
2087                 sta->supp_rates &= supp_rates;
2088                 if (sta->supp_rates == 0) {
2089                         /* No matching rates - this should not really happen.
2090                          * Make sure that at least one rate is marked
2091                          * supported to avoid issues with TX rate ctrl. */
2092                         sta->supp_rates = sdata->u.sta.supp_rates_bits;
2093                 }
2094                 if (sta->supp_rates != prev_rates) {
2095                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2096                                "%s based on beacon info (0x%x & 0x%x -> "
2097                                "0x%x)\n",
2098                                dev->name, print_mac(mac, sta->addr), prev_rates,
2099                                supp_rates, sta->supp_rates);
2100                 }
2101                 sta_info_put(sta);
2102         }
2103
2104         if (!elems.ssid)
2105                 return;
2106
2107         if (elems.ds_params && elems.ds_params_len == 1)
2108                 channel = elems.ds_params[0];
2109         else
2110                 channel = rx_status->channel;
2111
2112         bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
2113                                    elems.ssid, elems.ssid_len);
2114         if (!bss) {
2115                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
2116                                            elems.ssid, elems.ssid_len);
2117                 if (!bss)
2118                         return;
2119         } else {
2120 #if 0
2121                 /* TODO: order by RSSI? */
2122                 spin_lock_bh(&local->sta_bss_lock);
2123                 list_move_tail(&bss->list, &local->sta_bss_list);
2124                 spin_unlock_bh(&local->sta_bss_lock);
2125 #endif
2126         }
2127
2128         if (bss->probe_resp && beacon) {
2129                 /* Do not allow beacon to override data from Probe Response. */
2130                 ieee80211_rx_bss_put(dev, bss);
2131                 return;
2132         }
2133
2134         /* save the ERP value so that it is available at association time */
2135         if (elems.erp_info && elems.erp_info_len >= 1) {
2136                 bss->erp_value = elems.erp_info[0];
2137                 bss->has_erp_value = 1;
2138         }
2139
2140         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2141         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2142
2143         bss->supp_rates_len = 0;
2144         if (elems.supp_rates) {
2145                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2146                 if (clen > elems.supp_rates_len)
2147                         clen = elems.supp_rates_len;
2148                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2149                        clen);
2150                 bss->supp_rates_len += clen;
2151         }
2152         if (elems.ext_supp_rates) {
2153                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2154                 if (clen > elems.ext_supp_rates_len)
2155                         clen = elems.ext_supp_rates_len;
2156                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2157                        elems.ext_supp_rates, clen);
2158                 bss->supp_rates_len += clen;
2159         }
2160
2161         if (elems.wpa &&
2162             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2163              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2164                 kfree(bss->wpa_ie);
2165                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2166                 if (bss->wpa_ie) {
2167                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2168                         bss->wpa_ie_len = elems.wpa_len + 2;
2169                 } else
2170                         bss->wpa_ie_len = 0;
2171         } else if (!elems.wpa && bss->wpa_ie) {
2172                 kfree(bss->wpa_ie);
2173                 bss->wpa_ie = NULL;
2174                 bss->wpa_ie_len = 0;
2175         }
2176
2177         if (elems.rsn &&
2178             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2179              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2180                 kfree(bss->rsn_ie);
2181                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2182                 if (bss->rsn_ie) {
2183                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2184                         bss->rsn_ie_len = elems.rsn_len + 2;
2185                 } else
2186                         bss->rsn_ie_len = 0;
2187         } else if (!elems.rsn && bss->rsn_ie) {
2188                 kfree(bss->rsn_ie);
2189                 bss->rsn_ie = NULL;
2190                 bss->rsn_ie_len = 0;
2191         }
2192
2193         if (elems.wmm_param &&
2194             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2195              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2196                 kfree(bss->wmm_ie);
2197                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2198                 if (bss->wmm_ie) {
2199                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2200                                elems.wmm_param_len + 2);
2201                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2202                 } else
2203                         bss->wmm_ie_len = 0;
2204         } else if (!elems.wmm_param && bss->wmm_ie) {
2205                 kfree(bss->wmm_ie);
2206                 bss->wmm_ie = NULL;
2207                 bss->wmm_ie_len = 0;
2208         }
2209         if (elems.ht_cap_elem &&
2210             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2211              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2212                 kfree(bss->ht_ie);
2213                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2214                 if (bss->ht_ie) {
2215                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2216                                elems.ht_cap_elem_len + 2);
2217                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2218                 } else
2219                         bss->ht_ie_len = 0;
2220         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2221                 kfree(bss->ht_ie);
2222                 bss->ht_ie = NULL;
2223                 bss->ht_ie_len = 0;
2224         }
2225
2226         bss->hw_mode = rx_status->phymode;
2227         bss->freq = rx_status->freq;
2228         if (channel != rx_status->channel &&
2229             (bss->hw_mode == MODE_IEEE80211G ||
2230              bss->hw_mode == MODE_IEEE80211B) &&
2231             channel >= 1 && channel <= 14) {
2232                 static const int freq_list[] = {
2233                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
2234                         2447, 2452, 2457, 2462, 2467, 2472, 2484
2235                 };
2236                 /* IEEE 802.11g/b mode can receive packets from neighboring
2237                  * channels, so map the channel into frequency. */
2238                 bss->freq = freq_list[channel - 1];
2239         }
2240         bss->timestamp = timestamp;
2241         bss->last_update = jiffies;
2242         bss->rssi = rx_status->ssi;
2243         bss->signal = rx_status->signal;
2244         bss->noise = rx_status->noise;
2245         if (!beacon)
2246                 bss->probe_resp++;
2247         ieee80211_rx_bss_put(dev, bss);
2248 }
2249
2250
2251 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2252                                          struct ieee80211_mgmt *mgmt,
2253                                          size_t len,
2254                                          struct ieee80211_rx_status *rx_status)
2255 {
2256         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2257 }
2258
2259
2260 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2261                                      struct ieee80211_mgmt *mgmt,
2262                                      size_t len,
2263                                      struct ieee80211_rx_status *rx_status)
2264 {
2265         struct ieee80211_sub_if_data *sdata;
2266         struct ieee80211_if_sta *ifsta;
2267         size_t baselen;
2268         struct ieee802_11_elems elems;
2269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2270         struct ieee80211_conf *conf = &local->hw.conf;
2271         u32 changed = 0;
2272
2273         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2274
2275         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2276         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2277                 return;
2278         ifsta = &sdata->u.sta;
2279
2280         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2281             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2282                 return;
2283
2284         /* Process beacon from the current BSS */
2285         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2286         if (baselen > len)
2287                 return;
2288
2289         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2290
2291         if (elems.erp_info && elems.erp_info_len >= 1)
2292                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2293
2294         if (elems.ht_cap_elem && elems.ht_info_elem &&
2295             elems.wmm_param && local->ops->conf_ht &&
2296             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2297                 struct ieee80211_ht_bss_info bss_info;
2298
2299                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2300                                 (struct ieee80211_ht_addt_info *)
2301                                 elems.ht_info_elem, &bss_info);
2302                 /* check if AP changed bss inforamation */
2303                 if ((conf->ht_bss_conf.primary_channel !=
2304                      bss_info.primary_channel) ||
2305                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2306                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2307                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2308                                                 &bss_info);
2309         }
2310
2311         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2312                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2313                                          elems.wmm_param_len);
2314         }
2315
2316         ieee80211_bss_info_change_notify(sdata, changed);
2317 }
2318
2319
2320 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2321                                         struct ieee80211_if_sta *ifsta,
2322                                         struct ieee80211_mgmt *mgmt,
2323                                         size_t len,
2324                                         struct ieee80211_rx_status *rx_status)
2325 {
2326         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2327         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2328         int tx_last_beacon;
2329         struct sk_buff *skb;
2330         struct ieee80211_mgmt *resp;
2331         u8 *pos, *end;
2332         DECLARE_MAC_BUF(mac);
2333 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2334         DECLARE_MAC_BUF(mac2);
2335         DECLARE_MAC_BUF(mac3);
2336 #endif
2337
2338         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2339             ifsta->state != IEEE80211_IBSS_JOINED ||
2340             len < 24 + 2 || !ifsta->probe_resp)
2341                 return;
2342
2343         if (local->ops->tx_last_beacon)
2344                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2345         else
2346                 tx_last_beacon = 1;
2347
2348 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2349         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2350                "%s (tx_last_beacon=%d)\n",
2351                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2352                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2353 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2354
2355         if (!tx_last_beacon)
2356                 return;
2357
2358         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2359             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2360                 return;
2361
2362         end = ((u8 *) mgmt) + len;
2363         pos = mgmt->u.probe_req.variable;
2364         if (pos[0] != WLAN_EID_SSID ||
2365             pos + 2 + pos[1] > end) {
2366                 if (net_ratelimit()) {
2367                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2368                                "from %s\n",
2369                                dev->name, print_mac(mac, mgmt->sa));
2370                 }
2371                 return;
2372         }
2373         if (pos[1] != 0 &&
2374             (pos[1] != ifsta->ssid_len ||
2375              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2376                 /* Ignore ProbeReq for foreign SSID */
2377                 return;
2378         }
2379
2380         /* Reply with ProbeResp */
2381         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2382         if (!skb)
2383                 return;
2384
2385         resp = (struct ieee80211_mgmt *) skb->data;
2386         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2387 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2388         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2389                dev->name, print_mac(mac, resp->da));
2390 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2391         ieee80211_sta_tx(dev, skb, 0);
2392 }
2393
2394 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2395                                      struct ieee80211_if_sta *ifsta,
2396                                      struct ieee80211_mgmt *mgmt,
2397                                      size_t len)
2398 {
2399         if (len < IEEE80211_MIN_ACTION_SIZE)
2400                 return;
2401
2402         switch (mgmt->u.action.category) {
2403         case WLAN_CATEGORY_BACK:
2404                 switch (mgmt->u.action.u.addba_req.action_code) {
2405                 case WLAN_ACTION_ADDBA_REQ:
2406                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2407                                    sizeof(mgmt->u.action.u.addba_req)))
2408                                 break;
2409                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2410                         break;
2411                 case WLAN_ACTION_ADDBA_RESP:
2412                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2413                                    sizeof(mgmt->u.action.u.addba_resp)))
2414                                 break;
2415                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2416                         break;
2417                 case WLAN_ACTION_DELBA:
2418                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2419                                    sizeof(mgmt->u.action.u.delba)))
2420                                 break;
2421                         ieee80211_sta_process_delba(dev, mgmt, len);
2422                         break;
2423                 default:
2424                         if (net_ratelimit())
2425                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2426                                         dev->name);
2427                         break;
2428                 }
2429                 break;
2430         default:
2431                 break;
2432         }
2433 }
2434
2435 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2436                            struct ieee80211_rx_status *rx_status)
2437 {
2438         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2439         struct ieee80211_sub_if_data *sdata;
2440         struct ieee80211_if_sta *ifsta;
2441         struct ieee80211_mgmt *mgmt;
2442         u16 fc;
2443
2444         if (skb->len < 24)
2445                 goto fail;
2446
2447         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2448         ifsta = &sdata->u.sta;
2449
2450         mgmt = (struct ieee80211_mgmt *) skb->data;
2451         fc = le16_to_cpu(mgmt->frame_control);
2452
2453         switch (fc & IEEE80211_FCTL_STYPE) {
2454         case IEEE80211_STYPE_PROBE_REQ:
2455         case IEEE80211_STYPE_PROBE_RESP:
2456         case IEEE80211_STYPE_BEACON:
2457                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2458         case IEEE80211_STYPE_AUTH:
2459         case IEEE80211_STYPE_ASSOC_RESP:
2460         case IEEE80211_STYPE_REASSOC_RESP:
2461         case IEEE80211_STYPE_DEAUTH:
2462         case IEEE80211_STYPE_DISASSOC:
2463         case IEEE80211_STYPE_ACTION:
2464                 skb_queue_tail(&ifsta->skb_queue, skb);
2465                 queue_work(local->hw.workqueue, &ifsta->work);
2466                 return;
2467         default:
2468                 printk(KERN_DEBUG "%s: received unknown management frame - "
2469                        "stype=%d\n", dev->name,
2470                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2471                 break;
2472         }
2473
2474  fail:
2475         kfree_skb(skb);
2476 }
2477
2478
2479 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2480                                          struct sk_buff *skb)
2481 {
2482         struct ieee80211_rx_status *rx_status;
2483         struct ieee80211_sub_if_data *sdata;
2484         struct ieee80211_if_sta *ifsta;
2485         struct ieee80211_mgmt *mgmt;
2486         u16 fc;
2487
2488         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2489         ifsta = &sdata->u.sta;
2490
2491         rx_status = (struct ieee80211_rx_status *) skb->cb;
2492         mgmt = (struct ieee80211_mgmt *) skb->data;
2493         fc = le16_to_cpu(mgmt->frame_control);
2494
2495         switch (fc & IEEE80211_FCTL_STYPE) {
2496         case IEEE80211_STYPE_PROBE_REQ:
2497                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2498                                             rx_status);
2499                 break;
2500         case IEEE80211_STYPE_PROBE_RESP:
2501                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2502                 break;
2503         case IEEE80211_STYPE_BEACON:
2504                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2505                 break;
2506         case IEEE80211_STYPE_AUTH:
2507                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2508                 break;
2509         case IEEE80211_STYPE_ASSOC_RESP:
2510                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2511                 break;
2512         case IEEE80211_STYPE_REASSOC_RESP:
2513                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2514                 break;
2515         case IEEE80211_STYPE_DEAUTH:
2516                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2517                 break;
2518         case IEEE80211_STYPE_DISASSOC:
2519                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2520                 break;
2521         case IEEE80211_STYPE_ACTION:
2522                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2523                 break;
2524         }
2525
2526         kfree_skb(skb);
2527 }
2528
2529
2530 ieee80211_txrx_result
2531 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2532                       struct ieee80211_rx_status *rx_status)
2533 {
2534         struct ieee80211_mgmt *mgmt;
2535         u16 fc;
2536
2537         if (skb->len < 2)
2538                 return TXRX_DROP;
2539
2540         mgmt = (struct ieee80211_mgmt *) skb->data;
2541         fc = le16_to_cpu(mgmt->frame_control);
2542
2543         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2544                 return TXRX_CONTINUE;
2545
2546         if (skb->len < 24)
2547                 return TXRX_DROP;
2548
2549         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2550                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2551                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2552                                                      skb->len, rx_status);
2553                         dev_kfree_skb(skb);
2554                         return TXRX_QUEUED;
2555                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2556                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2557                                                  rx_status);
2558                         dev_kfree_skb(skb);
2559                         return TXRX_QUEUED;
2560                 }
2561         }
2562         return TXRX_CONTINUE;
2563 }
2564
2565
2566 static int ieee80211_sta_active_ibss(struct net_device *dev)
2567 {
2568         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2569         int active = 0;
2570         struct sta_info *sta;
2571
2572         read_lock_bh(&local->sta_lock);
2573         list_for_each_entry(sta, &local->sta_list, list) {
2574                 if (sta->dev == dev &&
2575                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2576                                jiffies)) {
2577                         active++;
2578                         break;
2579                 }
2580         }
2581         read_unlock_bh(&local->sta_lock);
2582
2583         return active;
2584 }
2585
2586
2587 static void ieee80211_sta_expire(struct net_device *dev)
2588 {
2589         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2590         struct sta_info *sta, *tmp;
2591         LIST_HEAD(tmp_list);
2592         DECLARE_MAC_BUF(mac);
2593
2594         write_lock_bh(&local->sta_lock);
2595         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2596                 if (time_after(jiffies, sta->last_rx +
2597                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2598                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2599                                dev->name, print_mac(mac, sta->addr));
2600                         __sta_info_get(sta);
2601                         sta_info_remove(sta);
2602                         list_add(&sta->list, &tmp_list);
2603                 }
2604         write_unlock_bh(&local->sta_lock);
2605
2606         list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2607                 sta_info_free(sta);
2608                 sta_info_put(sta);
2609         }
2610 }
2611
2612
2613 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2614                                      struct ieee80211_if_sta *ifsta)
2615 {
2616         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2617
2618         ieee80211_sta_expire(dev);
2619         if (ieee80211_sta_active_ibss(dev))
2620                 return;
2621
2622         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2623                "IBSS networks with same SSID (merge)\n", dev->name);
2624         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2625 }
2626
2627
2628 void ieee80211_sta_timer(unsigned long data)
2629 {
2630         struct ieee80211_sub_if_data *sdata =
2631                 (struct ieee80211_sub_if_data *) data;
2632         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2633         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2634
2635         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2636         queue_work(local->hw.workqueue, &ifsta->work);
2637 }
2638
2639
2640 void ieee80211_sta_work(struct work_struct *work)
2641 {
2642         struct ieee80211_sub_if_data *sdata =
2643                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2644         struct net_device *dev = sdata->dev;
2645         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2646         struct ieee80211_if_sta *ifsta;
2647         struct sk_buff *skb;
2648
2649         if (!netif_running(dev))
2650                 return;
2651
2652         if (local->sta_sw_scanning || local->sta_hw_scanning)
2653                 return;
2654
2655         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2656             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2657                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2658                        "(type=%d)\n", dev->name, sdata->vif.type);
2659                 return;
2660         }
2661         ifsta = &sdata->u.sta;
2662
2663         while ((skb = skb_dequeue(&ifsta->skb_queue)))
2664                 ieee80211_sta_rx_queued_mgmt(dev, skb);
2665
2666         if (ifsta->state != IEEE80211_AUTHENTICATE &&
2667             ifsta->state != IEEE80211_ASSOCIATE &&
2668             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2669                 if (ifsta->scan_ssid_len)
2670                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2671                 else
2672                         ieee80211_sta_start_scan(dev, NULL, 0);
2673                 return;
2674         }
2675
2676         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2677                 if (ieee80211_sta_config_auth(dev, ifsta))
2678                         return;
2679                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2680         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2681                 return;
2682
2683         switch (ifsta->state) {
2684         case IEEE80211_DISABLED:
2685                 break;
2686         case IEEE80211_AUTHENTICATE:
2687                 ieee80211_authenticate(dev, ifsta);
2688                 break;
2689         case IEEE80211_ASSOCIATE:
2690                 ieee80211_associate(dev, ifsta);
2691                 break;
2692         case IEEE80211_ASSOCIATED:
2693                 ieee80211_associated(dev, ifsta);
2694                 break;
2695         case IEEE80211_IBSS_SEARCH:
2696                 ieee80211_sta_find_ibss(dev, ifsta);
2697                 break;
2698         case IEEE80211_IBSS_JOINED:
2699                 ieee80211_sta_merge_ibss(dev, ifsta);
2700                 break;
2701         default:
2702                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2703                        ifsta->state);
2704                 break;
2705         }
2706
2707         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2708                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2709                        "mixed-cell disabled - disassociate\n", dev->name);
2710
2711                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2712                 ieee80211_set_disassoc(dev, ifsta, 0);
2713         }
2714 }
2715
2716
2717 static void ieee80211_sta_reset_auth(struct net_device *dev,
2718                                      struct ieee80211_if_sta *ifsta)
2719 {
2720         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2721
2722         if (local->ops->reset_tsf) {
2723                 /* Reset own TSF to allow time synchronization work. */
2724                 local->ops->reset_tsf(local_to_hw(local));
2725         }
2726
2727         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2728
2729
2730         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2731                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2732         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2733                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2734         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2735                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2736         else
2737                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2738         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2739                ifsta->auth_alg);
2740         ifsta->auth_transaction = -1;
2741         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2742         ifsta->auth_tries = ifsta->assoc_tries = 0;
2743         netif_carrier_off(dev);
2744 }
2745
2746
2747 void ieee80211_sta_req_auth(struct net_device *dev,
2748                             struct ieee80211_if_sta *ifsta)
2749 {
2750         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2751         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2752
2753         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2754                 return;
2755
2756         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2757                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2758             (ifsta->flags & (IEEE80211_STA_SSID_SET |
2759                                 IEEE80211_STA_AUTO_SSID_SEL))) {
2760                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2761                 queue_work(local->hw.workqueue, &ifsta->work);
2762         }
2763 }
2764
2765 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2766                                     const char *ssid, int ssid_len)
2767 {
2768         int tmp, hidden_ssid;
2769
2770         if (ssid_len == ifsta->ssid_len &&
2771             !memcmp(ifsta->ssid, ssid, ssid_len))
2772                 return 1;
2773
2774         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2775                 return 0;
2776
2777         hidden_ssid = 1;
2778         tmp = ssid_len;
2779         while (tmp--) {
2780                 if (ssid[tmp] != '\0') {
2781                         hidden_ssid = 0;
2782                         break;
2783                 }
2784         }
2785
2786         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2787                 return 1;
2788
2789         if (ssid_len == 1 && ssid[0] == ' ')
2790                 return 1;
2791
2792         return 0;
2793 }
2794
2795 static int ieee80211_sta_config_auth(struct net_device *dev,
2796                                      struct ieee80211_if_sta *ifsta)
2797 {
2798         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2799         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2800         struct ieee80211_sta_bss *bss, *selected = NULL;
2801         int top_rssi = 0, freq;
2802
2803         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2804             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2805                 ifsta->state = IEEE80211_AUTHENTICATE;
2806                 ieee80211_sta_reset_auth(dev, ifsta);
2807                 return 0;
2808         }
2809
2810         spin_lock_bh(&local->sta_bss_lock);
2811         freq = local->oper_channel->freq;
2812         list_for_each_entry(bss, &local->sta_bss_list, list) {
2813                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2814                         continue;
2815
2816                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2817                     !!sdata->default_key)
2818                         continue;
2819
2820                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2821                     bss->freq != freq)
2822                         continue;
2823
2824                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2825                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2826                         continue;
2827
2828                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2829                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2830                         continue;
2831
2832                 if (!selected || top_rssi < bss->rssi) {
2833                         selected = bss;
2834                         top_rssi = bss->rssi;
2835                 }
2836         }
2837         if (selected)
2838                 atomic_inc(&selected->users);
2839         spin_unlock_bh(&local->sta_bss_lock);
2840
2841         if (selected) {
2842                 ieee80211_set_channel(local, -1, selected->freq);
2843                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2844                         ieee80211_sta_set_ssid(dev, selected->ssid,
2845                                                selected->ssid_len);
2846                 ieee80211_sta_set_bssid(dev, selected->bssid);
2847                 ieee80211_rx_bss_put(dev, selected);
2848                 ifsta->state = IEEE80211_AUTHENTICATE;
2849                 ieee80211_sta_reset_auth(dev, ifsta);
2850                 return 0;
2851         } else {
2852                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2853                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2854                                 ieee80211_sta_start_scan(dev, NULL, 0);
2855                         else
2856                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2857                                                          ifsta->ssid_len);
2858                         ifsta->state = IEEE80211_AUTHENTICATE;
2859                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2860                 } else
2861                         ifsta->state = IEEE80211_DISABLED;
2862         }
2863         return -1;
2864 }
2865
2866 static int ieee80211_sta_join_ibss(struct net_device *dev,
2867                                    struct ieee80211_if_sta *ifsta,
2868                                    struct ieee80211_sta_bss *bss)
2869 {
2870         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2871         int res, rates, i, j;
2872         struct sk_buff *skb;
2873         struct ieee80211_mgmt *mgmt;
2874         struct ieee80211_tx_control control;
2875         struct ieee80211_hw_mode *mode;
2876         struct rate_selection ratesel;
2877         u8 *pos;
2878         struct ieee80211_sub_if_data *sdata;
2879
2880         /* Remove possible STA entries from other IBSS networks. */
2881         sta_info_flush(local, NULL);
2882
2883         if (local->ops->reset_tsf) {
2884                 /* Reset own TSF to allow time synchronization work. */
2885                 local->ops->reset_tsf(local_to_hw(local));
2886         }
2887         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2888         res = ieee80211_if_config(dev);
2889         if (res)
2890                 return res;
2891
2892         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2893
2894         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2895         sdata->drop_unencrypted = bss->capability &
2896                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2897
2898         res = ieee80211_set_channel(local, -1, bss->freq);
2899
2900         if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2901                 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2902                        "(%d MHz)\n", dev->name, local->hw.conf.channel,
2903                        local->hw.conf.freq);
2904                 return -1;
2905         }
2906
2907         /* Set beacon template based on scan results */
2908         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2909         do {
2910                 if (!skb)
2911                         break;
2912
2913                 skb_reserve(skb, local->hw.extra_tx_headroom);
2914
2915                 mgmt = (struct ieee80211_mgmt *)
2916                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2917                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2918                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2919                                                    IEEE80211_STYPE_BEACON);
2920                 memset(mgmt->da, 0xff, ETH_ALEN);
2921                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2922                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2923                 mgmt->u.beacon.beacon_int =
2924                         cpu_to_le16(local->hw.conf.beacon_int);
2925                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2926
2927                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2928                 *pos++ = WLAN_EID_SSID;
2929                 *pos++ = ifsta->ssid_len;
2930                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2931
2932                 rates = bss->supp_rates_len;
2933                 if (rates > 8)
2934                         rates = 8;
2935                 pos = skb_put(skb, 2 + rates);
2936                 *pos++ = WLAN_EID_SUPP_RATES;
2937                 *pos++ = rates;
2938                 memcpy(pos, bss->supp_rates, rates);
2939
2940                 pos = skb_put(skb, 2 + 1);
2941                 *pos++ = WLAN_EID_DS_PARAMS;
2942                 *pos++ = 1;
2943                 *pos++ = bss->channel;
2944
2945                 pos = skb_put(skb, 2 + 2);
2946                 *pos++ = WLAN_EID_IBSS_PARAMS;
2947                 *pos++ = 2;
2948                 /* FIX: set ATIM window based on scan results */
2949                 *pos++ = 0;
2950                 *pos++ = 0;
2951
2952                 if (bss->supp_rates_len > 8) {
2953                         rates = bss->supp_rates_len - 8;
2954                         pos = skb_put(skb, 2 + rates);
2955                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2956                         *pos++ = rates;
2957                         memcpy(pos, &bss->supp_rates[8], rates);
2958                 }
2959
2960                 memset(&control, 0, sizeof(control));
2961                 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2962                 if (!ratesel.rate) {
2963                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2964                                "for IBSS beacon\n", dev->name);
2965                         break;
2966                 }
2967                 control.vif = &sdata->vif;
2968                 control.tx_rate =
2969                         (sdata->bss_conf.use_short_preamble &&
2970                         (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2971                         ratesel.rate->val2 : ratesel.rate->val;
2972                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2973                 control.power_level = local->hw.conf.power_level;
2974                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2975                 control.retry_limit = 1;
2976
2977                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2978                 if (ifsta->probe_resp) {
2979                         mgmt = (struct ieee80211_mgmt *)
2980                                 ifsta->probe_resp->data;
2981                         mgmt->frame_control =
2982                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2983                                              IEEE80211_STYPE_PROBE_RESP);
2984                 } else {
2985                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2986                                "template for IBSS\n", dev->name);
2987                 }
2988
2989                 if (local->ops->beacon_update &&
2990                     local->ops->beacon_update(local_to_hw(local),
2991                                              skb, &control) == 0) {
2992                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2993                                "template based on scan results\n", dev->name);
2994                         skb = NULL;
2995                 }
2996
2997                 rates = 0;
2998                 mode = local->oper_hw_mode;
2999                 for (i = 0; i < bss->supp_rates_len; i++) {
3000                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
3001                         for (j = 0; j < mode->num_rates; j++)
3002                                 if (mode->rates[j].rate == bitrate)
3003                                         rates |= BIT(j);
3004                 }
3005                 ifsta->supp_rates_bits = rates;
3006         } while (0);
3007
3008         if (skb) {
3009                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3010                        "template\n", dev->name);
3011                 dev_kfree_skb(skb);
3012         }
3013
3014         ifsta->state = IEEE80211_IBSS_JOINED;
3015         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3016
3017         ieee80211_rx_bss_put(dev, bss);
3018
3019         return res;
3020 }
3021
3022
3023 static int ieee80211_sta_create_ibss(struct net_device *dev,
3024                                      struct ieee80211_if_sta *ifsta)
3025 {
3026         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3027         struct ieee80211_sta_bss *bss;
3028         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3029         struct ieee80211_hw_mode *mode;
3030         u8 bssid[ETH_ALEN], *pos;
3031         int i;
3032         DECLARE_MAC_BUF(mac);
3033
3034 #if 0
3035         /* Easier testing, use fixed BSSID. */
3036         memset(bssid, 0xfe, ETH_ALEN);
3037 #else
3038         /* Generate random, not broadcast, locally administered BSSID. Mix in
3039          * own MAC address to make sure that devices that do not have proper
3040          * random number generator get different BSSID. */
3041         get_random_bytes(bssid, ETH_ALEN);
3042         for (i = 0; i < ETH_ALEN; i++)
3043                 bssid[i] ^= dev->dev_addr[i];
3044         bssid[0] &= ~0x01;
3045         bssid[0] |= 0x02;
3046 #endif
3047
3048         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3049                dev->name, print_mac(mac, bssid));
3050
3051         bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
3052                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3053         if (!bss)
3054                 return -ENOMEM;
3055
3056         mode = local->oper_hw_mode;
3057
3058         if (local->hw.conf.beacon_int == 0)
3059                 local->hw.conf.beacon_int = 100;
3060         bss->beacon_int = local->hw.conf.beacon_int;
3061         bss->hw_mode = local->hw.conf.phymode;
3062         bss->freq = local->hw.conf.freq;
3063         bss->last_update = jiffies;
3064         bss->capability = WLAN_CAPABILITY_IBSS;
3065         if (sdata->default_key) {
3066                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3067         } else
3068                 sdata->drop_unencrypted = 0;
3069         bss->supp_rates_len = mode->num_rates;
3070         pos = bss->supp_rates;
3071         for (i = 0; i < mode->num_rates; i++) {
3072                 int rate = mode->rates[i].rate;
3073                 *pos++ = (u8) (rate / 5);
3074         }
3075
3076         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3077 }
3078
3079
3080 static int ieee80211_sta_find_ibss(struct net_device *dev,
3081                                    struct ieee80211_if_sta *ifsta)
3082 {
3083         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3084         struct ieee80211_sta_bss *bss;
3085         int found = 0;
3086         u8 bssid[ETH_ALEN];
3087         int active_ibss;
3088         DECLARE_MAC_BUF(mac);
3089         DECLARE_MAC_BUF(mac2);
3090
3091         if (ifsta->ssid_len == 0)
3092                 return -EINVAL;
3093
3094         active_ibss = ieee80211_sta_active_ibss(dev);
3095 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3096         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3097                dev->name, active_ibss);
3098 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3099         spin_lock_bh(&local->sta_bss_lock);
3100         list_for_each_entry(bss, &local->sta_bss_list, list) {
3101                 if (ifsta->ssid_len != bss->ssid_len ||
3102                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3103                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3104                         continue;
3105 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3106                 printk(KERN_DEBUG "   bssid=%s found\n",
3107                        print_mac(mac, bss->bssid));
3108 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3109                 memcpy(bssid, bss->bssid, ETH_ALEN);
3110                 found = 1;
3111                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3112                         break;
3113         }
3114         spin_unlock_bh(&local->sta_bss_lock);
3115
3116 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3117         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3118                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3119 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3120         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3121             (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
3122                                         ifsta->ssid, ifsta->ssid_len))) {
3123                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3124                        " based on configured SSID\n",
3125                        dev->name, print_mac(mac, bssid));
3126                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3127         }
3128 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3129         printk(KERN_DEBUG "   did not try to join ibss\n");
3130 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3131
3132         /* Selected IBSS not found in current scan results - try to scan */
3133         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3134             !ieee80211_sta_active_ibss(dev)) {
3135                 mod_timer(&ifsta->timer, jiffies +
3136                                       IEEE80211_IBSS_MERGE_INTERVAL);
3137         } else if (time_after(jiffies, local->last_scan_completed +
3138                               IEEE80211_SCAN_INTERVAL)) {
3139                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3140                        "join\n", dev->name);
3141                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3142                                               ifsta->ssid_len);
3143         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3144                 int interval = IEEE80211_SCAN_INTERVAL;
3145
3146                 if (time_after(jiffies, ifsta->ibss_join_req +
3147                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3148                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3149                             local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
3150                                 return ieee80211_sta_create_ibss(dev, ifsta);
3151                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3152                                 printk(KERN_DEBUG "%s: IBSS not allowed on the"
3153                                        " configured channel %d (%d MHz)\n",
3154                                        dev->name, local->hw.conf.channel,
3155                                        local->hw.conf.freq);
3156                         }
3157
3158                         /* No IBSS found - decrease scan interval and continue
3159                          * scanning. */
3160                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3161                 }
3162
3163                 ifsta->state = IEEE80211_IBSS_SEARCH;
3164                 mod_timer(&ifsta->timer, jiffies + interval);
3165                 return 0;
3166         }
3167
3168         return 0;
3169 }
3170
3171
3172 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3173 {
3174         struct ieee80211_sub_if_data *sdata;
3175         struct ieee80211_if_sta *ifsta;
3176         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3177
3178         if (len > IEEE80211_MAX_SSID_LEN)
3179                 return -EINVAL;
3180
3181         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3182          * not defined. */
3183         if (local->ops->conf_tx) {
3184                 struct ieee80211_tx_queue_params qparam;
3185                 int i;
3186
3187                 memset(&qparam, 0, sizeof(qparam));
3188                 /* TODO: are these ok defaults for all hw_modes? */
3189                 qparam.aifs = 2;
3190                 qparam.cw_min =
3191                         local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3192                 qparam.cw_max = 1023;
3193                 qparam.burst_time = 0;
3194                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3195                 {
3196                         local->ops->conf_tx(local_to_hw(local),
3197                                            i + IEEE80211_TX_QUEUE_DATA0,
3198                                            &qparam);
3199                 }
3200                 /* IBSS uses different parameters for Beacon sending */
3201                 qparam.cw_min++;
3202                 qparam.cw_min *= 2;
3203                 qparam.cw_min--;
3204                 local->ops->conf_tx(local_to_hw(local),
3205                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
3206         }
3207
3208         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3209         ifsta = &sdata->u.sta;
3210
3211         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3212                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3213         memcpy(ifsta->ssid, ssid, len);
3214         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3215         ifsta->ssid_len = len;
3216
3217         if (len)
3218                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3219         else
3220                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3221         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3222             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3223                 ifsta->ibss_join_req = jiffies;
3224                 ifsta->state = IEEE80211_IBSS_SEARCH;
3225                 return ieee80211_sta_find_ibss(dev, ifsta);
3226         }
3227         return 0;
3228 }
3229
3230
3231 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3232 {
3233         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3234         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3235         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3236         *len = ifsta->ssid_len;
3237         return 0;
3238 }
3239
3240
3241 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3242 {
3243         struct ieee80211_sub_if_data *sdata;
3244         struct ieee80211_if_sta *ifsta;
3245         int res;
3246
3247         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3248         ifsta = &sdata->u.sta;
3249
3250         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3251                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3252                 res = ieee80211_if_config(dev);
3253                 if (res) {
3254                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3255                                "the low-level driver\n", dev->name);
3256                         return res;
3257                 }
3258         }
3259
3260         if (is_valid_ether_addr(bssid))
3261                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3262         else
3263                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3264
3265         return 0;
3266 }
3267
3268
3269 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3270                                     struct ieee80211_sub_if_data *sdata,
3271                                     int powersave)
3272 {
3273         struct sk_buff *skb;
3274         struct ieee80211_hdr *nullfunc;
3275         u16 fc;
3276
3277         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3278         if (!skb) {
3279                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3280                        "frame\n", sdata->dev->name);
3281                 return;
3282         }
3283         skb_reserve(skb, local->hw.extra_tx_headroom);
3284
3285         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3286         memset(nullfunc, 0, 24);
3287         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3288              IEEE80211_FCTL_TODS;
3289         if (powersave)
3290                 fc |= IEEE80211_FCTL_PM;
3291         nullfunc->frame_control = cpu_to_le16(fc);
3292         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3293         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3294         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3295
3296         ieee80211_sta_tx(sdata->dev, skb, 0);
3297 }
3298
3299
3300 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3301 {
3302         struct ieee80211_local *local = hw_to_local(hw);
3303         struct net_device *dev = local->scan_dev;
3304         struct ieee80211_sub_if_data *sdata;
3305         union iwreq_data wrqu;
3306
3307         local->last_scan_completed = jiffies;
3308         memset(&wrqu, 0, sizeof(wrqu));
3309         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3310
3311         if (local->sta_hw_scanning) {
3312                 local->sta_hw_scanning = 0;
3313                 goto done;
3314         }
3315
3316         local->sta_sw_scanning = 0;
3317         if (ieee80211_hw_config(local))
3318                 printk(KERN_DEBUG "%s: failed to restore operational "
3319                        "channel after scan\n", dev->name);
3320
3321
3322         netif_tx_lock_bh(local->mdev);
3323         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3324         local->ops->configure_filter(local_to_hw(local),
3325                                      FIF_BCN_PRBRESP_PROMISC,
3326                                      &local->filter_flags,
3327                                      local->mdev->mc_count,
3328                                      local->mdev->mc_list);
3329
3330         netif_tx_unlock_bh(local->mdev);
3331
3332         rcu_read_lock();
3333         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3334
3335                 /* No need to wake the master device. */
3336                 if (sdata->dev == local->mdev)
3337                         continue;
3338
3339                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3340                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3341                                 ieee80211_send_nullfunc(local, sdata, 0);
3342                         ieee80211_sta_timer((unsigned long)sdata);
3343                 }
3344
3345                 netif_wake_queue(sdata->dev);
3346         }
3347         rcu_read_unlock();
3348
3349 done:
3350         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3351         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3352                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3353                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3354                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3355                     !ieee80211_sta_active_ibss(dev)))
3356                         ieee80211_sta_find_ibss(dev, ifsta);
3357         }
3358 }
3359 EXPORT_SYMBOL(ieee80211_scan_completed);
3360
3361 void ieee80211_sta_scan_work(struct work_struct *work)
3362 {
3363         struct ieee80211_local *local =
3364                 container_of(work, struct ieee80211_local, scan_work.work);
3365         struct net_device *dev = local->scan_dev;
3366         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3367         struct ieee80211_hw_mode *mode;
3368         struct ieee80211_channel *chan;
3369         int skip;
3370         unsigned long next_delay = 0;
3371
3372         if (!local->sta_sw_scanning)
3373                 return;
3374
3375         switch (local->scan_state) {
3376         case SCAN_SET_CHANNEL:
3377                 mode = local->scan_hw_mode;
3378                 if (local->scan_hw_mode->list.next == &local->modes_list &&
3379                     local->scan_channel_idx >= mode->num_channels) {
3380                         ieee80211_scan_completed(local_to_hw(local));
3381                         return;
3382                 }
3383                 skip = !(local->enabled_modes & (1 << mode->mode));
3384                 chan = &mode->channels[local->scan_channel_idx];
3385                 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3386                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3387                      !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3388                     (local->hw_modes & local->enabled_modes &
3389                      (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3390                         skip = 1;
3391
3392                 if (!skip) {
3393 #if 0
3394                         printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3395                                dev->name, chan->chan, chan->freq);
3396 #endif
3397
3398                         local->scan_channel = chan;
3399                         if (ieee80211_hw_config(local)) {
3400                                 printk(KERN_DEBUG "%s: failed to set channel "
3401                                        "%d (%d MHz) for scan\n", dev->name,
3402                                        chan->chan, chan->freq);
3403                                 skip = 1;
3404                         }
3405                 }
3406
3407                 local->scan_channel_idx++;
3408                 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3409                         if (local->scan_hw_mode->list.next != &local->modes_list) {
3410                                 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3411                                                                  struct ieee80211_hw_mode,
3412                                                                  list);
3413                                 local->scan_channel_idx = 0;
3414                         }
3415                 }
3416
3417                 if (skip)
3418                         break;
3419
3420                 next_delay = IEEE80211_PROBE_DELAY +
3421                              usecs_to_jiffies(local->hw.channel_change_time);
3422                 local->scan_state = SCAN_SEND_PROBE;
3423                 break;
3424         case SCAN_SEND_PROBE:
3425                 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3426                         ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3427                                                  local->scan_ssid_len);
3428                         next_delay = IEEE80211_CHANNEL_TIME;
3429                 } else
3430                         next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3431                 local->scan_state = SCAN_SET_CHANNEL;
3432                 break;
3433         }
3434
3435         if (local->sta_sw_scanning)
3436                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3437                                    next_delay);
3438 }
3439
3440
3441 static int ieee80211_sta_start_scan(struct net_device *dev,
3442                                     u8 *ssid, size_t ssid_len)
3443 {
3444         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3445         struct ieee80211_sub_if_data *sdata;
3446
3447         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3448                 return -EINVAL;
3449
3450         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3451          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3452          * BSSID: MACAddress
3453          * SSID
3454          * ScanType: ACTIVE, PASSIVE
3455          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3456          *    a Probe frame during active scanning
3457          * ChannelList
3458          * MinChannelTime (>= ProbeDelay), in TU
3459          * MaxChannelTime: (>= MinChannelTime), in TU
3460          */
3461
3462          /* MLME-SCAN.confirm
3463           * BSSDescriptionSet
3464           * ResultCode: SUCCESS, INVALID_PARAMETERS
3465          */
3466
3467         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3468                 if (local->scan_dev == dev)
3469                         return 0;
3470                 return -EBUSY;
3471         }
3472
3473         if (local->ops->hw_scan) {
3474                 int rc = local->ops->hw_scan(local_to_hw(local),
3475                                              ssid, ssid_len);
3476                 if (!rc) {
3477                         local->sta_hw_scanning = 1;
3478                         local->scan_dev = dev;
3479                 }
3480                 return rc;
3481         }
3482
3483         local->sta_sw_scanning = 1;
3484
3485         rcu_read_lock();
3486         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3487
3488                 /* Don't stop the master interface, otherwise we can't transmit
3489                  * probes! */
3490                 if (sdata->dev == local->mdev)
3491                         continue;
3492
3493                 netif_stop_queue(sdata->dev);
3494                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3495                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3496                         ieee80211_send_nullfunc(local, sdata, 1);
3497         }
3498         rcu_read_unlock();
3499
3500         if (ssid) {
3501                 local->scan_ssid_len = ssid_len;
3502                 memcpy(local->scan_ssid, ssid, ssid_len);
3503         } else
3504                 local->scan_ssid_len = 0;
3505         local->scan_state = SCAN_SET_CHANNEL;
3506         local->scan_hw_mode = list_entry(local->modes_list.next,
3507                                          struct ieee80211_hw_mode,
3508                                          list);
3509         local->scan_channel_idx = 0;
3510         local->scan_dev = dev;
3511
3512         netif_tx_lock_bh(local->mdev);
3513         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3514         local->ops->configure_filter(local_to_hw(local),
3515                                      FIF_BCN_PRBRESP_PROMISC,
3516                                      &local->filter_flags,
3517                                      local->mdev->mc_count,
3518                                      local->mdev->mc_list);
3519         netif_tx_unlock_bh(local->mdev);
3520
3521         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3522         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3523                            IEEE80211_CHANNEL_TIME);
3524
3525         return 0;
3526 }
3527
3528
3529 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3530 {
3531         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3532         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3533         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3534
3535         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3536                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3537
3538         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3539                 if (local->scan_dev == dev)
3540                         return 0;
3541                 return -EBUSY;
3542         }
3543
3544         ifsta->scan_ssid_len = ssid_len;
3545         if (ssid_len)
3546                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3547         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3548         queue_work(local->hw.workqueue, &ifsta->work);
3549         return 0;
3550 }
3551
3552 static char *
3553 ieee80211_sta_scan_result(struct net_device *dev,
3554                           struct ieee80211_sta_bss *bss,
3555                           char *current_ev, char *end_buf)
3556 {
3557         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3558         struct iw_event iwe;
3559
3560         if (time_after(jiffies,
3561                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3562                 return current_ev;
3563
3564         if (!(local->enabled_modes & (1 << bss->hw_mode)))
3565                 return current_ev;
3566
3567         memset(&iwe, 0, sizeof(iwe));
3568         iwe.cmd = SIOCGIWAP;
3569         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3570         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3571         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3572                                           IW_EV_ADDR_LEN);
3573
3574         memset(&iwe, 0, sizeof(iwe));
3575         iwe.cmd = SIOCGIWESSID;
3576         iwe.u.data.length = bss->ssid_len;
3577         iwe.u.data.flags = 1;
3578         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3579                                           bss->ssid);
3580
3581         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3582                 memset(&iwe, 0, sizeof(iwe));
3583                 iwe.cmd = SIOCGIWMODE;
3584                 if (bss->capability & WLAN_CAPABILITY_ESS)
3585                         iwe.u.mode = IW_MODE_MASTER;
3586                 else
3587                         iwe.u.mode = IW_MODE_ADHOC;
3588                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3589                                                   IW_EV_UINT_LEN);
3590         }
3591
3592         memset(&iwe, 0, sizeof(iwe));
3593         iwe.cmd = SIOCGIWFREQ;
3594         iwe.u.freq.m = bss->channel;
3595         iwe.u.freq.e = 0;
3596         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3597                                           IW_EV_FREQ_LEN);
3598         iwe.u.freq.m = bss->freq * 100000;
3599         iwe.u.freq.e = 1;
3600         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3601                                           IW_EV_FREQ_LEN);
3602
3603         memset(&iwe, 0, sizeof(iwe));
3604         iwe.cmd = IWEVQUAL;
3605         iwe.u.qual.qual = bss->signal;
3606         iwe.u.qual.level = bss->rssi;
3607         iwe.u.qual.noise = bss->noise;
3608         iwe.u.qual.updated = local->wstats_flags;
3609         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3610                                           IW_EV_QUAL_LEN);
3611
3612         memset(&iwe, 0, sizeof(iwe));
3613         iwe.cmd = SIOCGIWENCODE;
3614         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3615                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3616         else
3617                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3618         iwe.u.data.length = 0;
3619         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3620
3621         if (bss && bss->wpa_ie) {
3622                 memset(&iwe, 0, sizeof(iwe));
3623                 iwe.cmd = IWEVGENIE;
3624                 iwe.u.data.length = bss->wpa_ie_len;
3625                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3626                                                   bss->wpa_ie);
3627         }
3628
3629         if (bss && bss->rsn_ie) {
3630                 memset(&iwe, 0, sizeof(iwe));
3631                 iwe.cmd = IWEVGENIE;
3632                 iwe.u.data.length = bss->rsn_ie_len;
3633                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3634                                                   bss->rsn_ie);
3635         }
3636
3637         if (bss && bss->supp_rates_len > 0) {
3638                 /* display all supported rates in readable format */
3639                 char *p = current_ev + IW_EV_LCP_LEN;
3640                 int i;
3641
3642                 memset(&iwe, 0, sizeof(iwe));
3643                 iwe.cmd = SIOCGIWRATE;
3644                 /* Those two flags are ignored... */
3645                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3646
3647                 for (i = 0; i < bss->supp_rates_len; i++) {
3648                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3649                                                         0x7f) * 500000);
3650                         p = iwe_stream_add_value(current_ev, p,
3651                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3652                 }
3653                 current_ev = p;
3654         }
3655
3656         if (bss) {
3657                 char *buf;
3658                 buf = kmalloc(30, GFP_ATOMIC);
3659                 if (buf) {
3660                         memset(&iwe, 0, sizeof(iwe));
3661                         iwe.cmd = IWEVCUSTOM;
3662                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3663                         iwe.u.data.length = strlen(buf);
3664                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3665                                                           &iwe, buf);
3666                         kfree(buf);
3667                 }
3668         }
3669
3670         return current_ev;
3671 }
3672
3673
3674 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3675 {
3676         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3677         char *current_ev = buf;
3678         char *end_buf = buf + len;
3679         struct ieee80211_sta_bss *bss;
3680
3681         spin_lock_bh(&local->sta_bss_lock);
3682         list_for_each_entry(bss, &local->sta_bss_list, list) {
3683                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3684                         spin_unlock_bh(&local->sta_bss_lock);
3685                         return -E2BIG;
3686                 }
3687                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3688                                                        end_buf);
3689         }
3690         spin_unlock_bh(&local->sta_bss_lock);
3691         return current_ev - buf;
3692 }
3693
3694
3695 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3696 {
3697         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3698         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3699         kfree(ifsta->extra_ie);
3700         if (len == 0) {
3701                 ifsta->extra_ie = NULL;
3702                 ifsta->extra_ie_len = 0;
3703                 return 0;
3704         }
3705         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3706         if (!ifsta->extra_ie) {
3707                 ifsta->extra_ie_len = 0;
3708                 return -ENOMEM;
3709         }
3710         memcpy(ifsta->extra_ie, ie, len);
3711         ifsta->extra_ie_len = len;
3712         return 0;
3713 }
3714
3715
3716 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3717                                          struct sk_buff *skb, u8 *bssid,
3718                                          u8 *addr)
3719 {
3720         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3721         struct sta_info *sta;
3722         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3723         DECLARE_MAC_BUF(mac);
3724
3725         /* TODO: Could consider removing the least recently used entry and
3726          * allow new one to be added. */
3727         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3728                 if (net_ratelimit()) {
3729                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3730                                "entry %s\n", dev->name, print_mac(mac, addr));
3731                 }
3732                 return NULL;
3733         }
3734
3735         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3736                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3737
3738         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3739         if (!sta)
3740                 return NULL;
3741
3742         sta->supp_rates = sdata->u.sta.supp_rates_bits;
3743
3744         rate_control_rate_init(sta, local);
3745
3746         return sta; /* caller will call sta_info_put() */
3747 }
3748
3749
3750 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3751 {
3752         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3753         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3754
3755         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3756                dev->name, reason);
3757
3758         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3759             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3760                 return -EINVAL;
3761
3762         ieee80211_send_deauth(dev, ifsta, reason);
3763         ieee80211_set_disassoc(dev, ifsta, 1);
3764         return 0;
3765 }
3766
3767
3768 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3769 {
3770         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3771         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3772
3773         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3774                dev->name, reason);
3775
3776         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3777                 return -EINVAL;
3778
3779         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3780                 return -1;
3781
3782         ieee80211_send_disassoc(dev, ifsta, reason);
3783         ieee80211_set_disassoc(dev, ifsta, 0);
3784         return 0;
3785 }