SAFE public projects git trees. - safe/jmp/linux-2.6/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 freq,
  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->center_freq,
 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 sk_buff *skb;
 597         struct ieee80211_mgmt *mgmt;
 598         u8 *pos, *ies;
 599         int i, len;
 600         u16 capab;
 601         struct ieee80211_sta_bss *bss;
 602         int wmm = 0;
 603         struct ieee80211_supported_band *sband;
 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         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 616
 617         capab = ifsta->capab;
 618
 619         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 620                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 621                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 622                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 623                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 624         }
 625
 626         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 627                                    local->hw.conf.channel->center_freq,
 628                                    ifsta->ssid, ifsta->ssid_len);
 629         if (bss) {
 630                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 631                         capab |= WLAN_CAPABILITY_PRIVACY;
 632                 if (bss->wmm_ie) {
 633                         wmm = 1;
 634                 }
 635                 ieee80211_rx_bss_put(dev, bss);
 636         }
 637
 638         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 639         memset(mgmt, 0, 24);
 640         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 641         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 642         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 643
 644         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 645                 skb_put(skb, 10);
 646                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 647                                                    IEEE80211_STYPE_REASSOC_REQ);
 648                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 649                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 650                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 651                        ETH_ALEN);
 652         } else {
 653                 skb_put(skb, 4);
 654                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 655                                                    IEEE80211_STYPE_ASSOC_REQ);
 656                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 657                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 658         }
 659
 660         /* SSID */
 661         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 662         *pos++ = WLAN_EID_SSID;
 663         *pos++ = ifsta->ssid_len;
 664         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 665
 666         len = sband->n_bitrates;
 667         if (len > 8)
 668                 len = 8;
 669         pos = skb_put(skb, len + 2);
 670         *pos++ = WLAN_EID_SUPP_RATES;
 671         *pos++ = len;
 672         for (i = 0; i < len; i++) {
 673                 int rate = sband->bitrates[i].bitrate;
 674                 *pos++ = (u8) (rate / 5);
 675         }
 676
 677         if (sband->n_bitrates > len) {
 678                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 679                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 680                 *pos++ = sband->n_bitrates - len;
 681                 for (i = len; i < sband->n_bitrates; i++) {
 682                         int rate = sband->bitrates[i].bitrate;
 683                         *pos++ = (u8) (rate / 5);
 684                 }
 685         }
 686
 687         if (ifsta->extra_ie) {
 688                 pos = skb_put(skb, ifsta->extra_ie_len);
 689                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 690         }
 691
 692         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 693                 pos = skb_put(skb, 9);
 694                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 695                 *pos++ = 7; /* len */
 696                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 697                 *pos++ = 0x50;
 698                 *pos++ = 0xf2;
 699                 *pos++ = 2; /* WME */
 700                 *pos++ = 0; /* WME info */
 701                 *pos++ = 1; /* WME ver */
 702                 *pos++ = 0;
 703         }
 704         /* wmm support is a must to HT */
 705         if (wmm && sband->ht_info.ht_supported) {
 706                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 707                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 708                 *pos++ = WLAN_EID_HT_CAPABILITY;
 709                 *pos++ = sizeof(struct ieee80211_ht_cap);
 710                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 711                 memcpy(pos, &tmp, sizeof(u16));
 712                 pos += sizeof(u16);
 713                 /* TODO: needs a define here for << 2 */
 714                 *pos++ = sband->ht_info.ampdu_factor |
 715                          (sband->ht_info.ampdu_density << 2);
 716                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 717         }
 718
 719         kfree(ifsta->assocreq_ies);
 720         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 721         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 722         if (ifsta->assocreq_ies)
 723                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 724
 725         ieee80211_sta_tx(dev, skb, 0);
 726 }
 727
 728
 729 static void ieee80211_send_deauth(struct net_device *dev,
 730                                   struct ieee80211_if_sta *ifsta, u16 reason)
 731 {
 732         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 733         struct sk_buff *skb;
 734         struct ieee80211_mgmt *mgmt;
 735
 736         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 737         if (!skb) {
 738                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 739                        "frame\n", dev->name);
 740                 return;
 741         }
 742         skb_reserve(skb, local->hw.extra_tx_headroom);
 743
 744         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 745         memset(mgmt, 0, 24);
 746         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 747         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 748         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 749         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 750                                            IEEE80211_STYPE_DEAUTH);
 751         skb_put(skb, 2);
 752         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 753
 754         ieee80211_sta_tx(dev, skb, 0);
 755 }
 756
 757
 758 static void ieee80211_send_disassoc(struct net_device *dev,
 759                                     struct ieee80211_if_sta *ifsta, u16 reason)
 760 {
 761         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 762         struct sk_buff *skb;
 763         struct ieee80211_mgmt *mgmt;
 764
 765         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 766         if (!skb) {
 767                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 768                        "frame\n", dev->name);
 769                 return;
 770         }
 771         skb_reserve(skb, local->hw.extra_tx_headroom);
 772
 773         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 774         memset(mgmt, 0, 24);
 775         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 776         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 777         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 778         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 779                                            IEEE80211_STYPE_DISASSOC);
 780         skb_put(skb, 2);
 781         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 782
 783         ieee80211_sta_tx(dev, skb, 0);
 784 }
 785
 786
 787 static int ieee80211_privacy_mismatch(struct net_device *dev,
 788                                       struct ieee80211_if_sta *ifsta)
 789 {
 790         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 791         struct ieee80211_sta_bss *bss;
 792         int bss_privacy;
 793         int wep_privacy;
 794         int privacy_invoked;
 795
 796         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 797                 return 0;
 798
 799         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 800                                    local->hw.conf.channel->center_freq,
 801                                    ifsta->ssid, ifsta->ssid_len);
 802         if (!bss)
 803                 return 0;
 804
 805         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 806         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 807         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 808
 809         ieee80211_rx_bss_put(dev, bss);
 810
 811         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 812                 return 0;
 813
 814         return 1;
 815 }
 816
 817
 818 static void ieee80211_associate(struct net_device *dev,
 819                                 struct ieee80211_if_sta *ifsta)
 820 {
 821         DECLARE_MAC_BUF(mac);
 822
 823         ifsta->assoc_tries++;
 824         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 825                 printk(KERN_DEBUG "%s: association with AP %s"
 826                        " timed out\n",
 827                        dev->name, print_mac(mac, ifsta->bssid));
 828                 ifsta->state = IEEE80211_DISABLED;
 829                 return;
 830         }
 831
 832         ifsta->state = IEEE80211_ASSOCIATE;
 833         printk(KERN_DEBUG "%s: associate with AP %s\n",
 834                dev->name, print_mac(mac, ifsta->bssid));
 835         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 836                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 837                        "mixed-cell disabled - abort association\n", dev->name);
 838                 ifsta->state = IEEE80211_DISABLED;
 839                 return;
 840         }
 841
 842         ieee80211_send_assoc(dev, ifsta);
 843
 844         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 845 }
 846
 847
 848 static void ieee80211_associated(struct net_device *dev,
 849                                  struct ieee80211_if_sta *ifsta)
 850 {
 851         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 852         struct sta_info *sta;
 853         int disassoc;
 854         DECLARE_MAC_BUF(mac);
 855
 856         /* TODO: start monitoring current AP signal quality and number of
 857          * missed beacons. Scan other channels every now and then and search
 858          * for better APs. */
 859         /* TODO: remove expired BSSes */
 860
 861         ifsta->state = IEEE80211_ASSOCIATED;
 862
 863         sta = sta_info_get(local, ifsta->bssid);
 864         if (!sta) {
 865                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 866                        dev->name, print_mac(mac, ifsta->bssid));
 867                 disassoc = 1;
 868         } else {
 869                 disassoc = 0;
 870                 if (time_after(jiffies,
 871                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 872                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 873                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 874                                        "current AP %s - assume out of "
 875                                        "range\n",
 876                                        dev->name, print_mac(mac, ifsta->bssid));
 877                                 disassoc = 1;
 878                                 sta_info_free(sta);
 879                         } else
 880                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 881                                                          local->scan_ssid,
 882                                                          local->scan_ssid_len);
 883                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 884                 } else {
 885                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 886                         if (time_after(jiffies, ifsta->last_probe +
 887                                        IEEE80211_PROBE_INTERVAL)) {
 888                                 ifsta->last_probe = jiffies;
 889                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 890                                                          ifsta->ssid,
 891                                                          ifsta->ssid_len);
 892                         }
 893                 }
 894                 sta_info_put(sta);
 895         }
 896         if (disassoc) {
 897                 ifsta->state = IEEE80211_DISABLED;
 898                 ieee80211_set_associated(dev, ifsta, 0);
 899         } else {
 900                 mod_timer(&ifsta->timer, jiffies +
 901                                       IEEE80211_MONITORING_INTERVAL);
 902         }
 903 }
 904
 905
 906 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 907                                      u8 *ssid, size_t ssid_len)
 908 {
 909         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 910         struct ieee80211_supported_band *sband;
 911         struct sk_buff *skb;
 912         struct ieee80211_mgmt *mgmt;
 913         u8 *pos, *supp_rates, *esupp_rates = NULL;
 914         int i;
 915
 916         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 917         if (!skb) {
 918                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 919                        "request\n", dev->name);
 920                 return;
 921         }
 922         skb_reserve(skb, local->hw.extra_tx_headroom);
 923
 924         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 925         memset(mgmt, 0, 24);
 926         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 927                                            IEEE80211_STYPE_PROBE_REQ);
 928         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 929         if (dst) {
 930                 memcpy(mgmt->da, dst, ETH_ALEN);
 931                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 932         } else {
 933                 memset(mgmt->da, 0xff, ETH_ALEN);
 934                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 935         }
 936         pos = skb_put(skb, 2 + ssid_len);
 937         *pos++ = WLAN_EID_SSID;
 938         *pos++ = ssid_len;
 939         memcpy(pos, ssid, ssid_len);
 940
 941         supp_rates = skb_put(skb, 2);
 942         supp_rates[0] = WLAN_EID_SUPP_RATES;
 943         supp_rates[1] = 0;
 944         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 945
 946         for (i = 0; i < sband->n_bitrates; i++) {
 947                 struct ieee80211_rate *rate = &sband->bitrates[i];
 948                 if (esupp_rates) {
 949                         pos = skb_put(skb, 1);
 950                         esupp_rates[1]++;
 951                 } else if (supp_rates[1] == 8) {
 952                         esupp_rates = skb_put(skb, 3);
 953                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 954                         esupp_rates[1] = 1;
 955                         pos = &esupp_rates[2];
 956                 } else {
 957                         pos = skb_put(skb, 1);
 958                         supp_rates[1]++;
 959                 }
 960                 *pos = rate->bitrate / 5;
 961         }
 962
 963         ieee80211_sta_tx(dev, skb, 0);
 964 }
 965
 966
 967 static int ieee80211_sta_wep_configured(struct net_device *dev)
 968 {
 969         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 970         if (!sdata || !sdata->default_key ||
 971             sdata->default_key->conf.alg != ALG_WEP)
 972                 return 0;
 973         return 1;
 974 }
 975
 976
 977 static void ieee80211_auth_completed(struct net_device *dev,
 978                                      struct ieee80211_if_sta *ifsta)
 979 {
 980         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 981         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 982         ieee80211_associate(dev, ifsta);
 983 }
 984
 985
 986 static void ieee80211_auth_challenge(struct net_device *dev,
 987                                      struct ieee80211_if_sta *ifsta,
 988                                      struct ieee80211_mgmt *mgmt,
 989                                      size_t len)
 990 {
 991         u8 *pos;
 992         struct ieee802_11_elems elems;
 993
 994         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 995         pos = mgmt->u.auth.variable;
 996         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 997         if (!elems.challenge) {
 998                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 999                        "frame\n", dev->name);
1000                 return;
1001         }
1002         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1003                             elems.challenge_len + 2, 1);
1004 }
1005
1006 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1007                                         u8 dialog_token, u16 status, u16 policy,
1008                                         u16 buf_size, u16 timeout)
1009 {
1010         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1011         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1012         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1013         struct sk_buff *skb;
1014         struct ieee80211_mgmt *mgmt;
1015         u16 capab;
1016
1017         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1018                                         sizeof(mgmt->u.action.u.addba_resp));
1019         if (!skb) {
1020                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1021                        "for addba resp frame\n", dev->name);
1022                 return;
1023         }
1024
1025         skb_reserve(skb, local->hw.extra_tx_headroom);
1026         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1027         memset(mgmt, 0, 24);
1028         memcpy(mgmt->da, da, ETH_ALEN);
1029         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1030         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1031                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1032         else
1033                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1034         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1035                                            IEEE80211_STYPE_ACTION);
1036
1037         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1038         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1039         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1040         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1041
1042         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1043         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1044         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1045
1046         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1047         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1048         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1049
1050         ieee80211_sta_tx(dev, skb, 0);
1051
1052         return;
1053 }
1054
1055 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1056                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1057                                 u16 agg_size, u16 timeout)
1058 {
1059         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1060         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1061         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1062         struct sk_buff *skb;
1063         struct ieee80211_mgmt *mgmt;
1064         u16 capab;
1065
1066         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1067                                 sizeof(mgmt->u.action.u.addba_req));
1068
1069
1070         if (!skb) {
1071                 printk(KERN_ERR "%s: failed to allocate buffer "
1072                                 "for addba request frame\n", dev->name);
1073                 return;
1074         }
1075         skb_reserve(skb, local->hw.extra_tx_headroom);
1076         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1077         memset(mgmt, 0, 24);
1078         memcpy(mgmt->da, da, ETH_ALEN);
1079         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1080         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1081                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1082         else
1083                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1084
1085         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1086                                         IEEE80211_STYPE_ACTION);
1087
1088         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1089
1090         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1091         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1092
1093         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1094         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1095         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1096         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1097
1098         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1099
1100         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1101         mgmt->u.action.u.addba_req.start_seq_num =
1102                                         cpu_to_le16(start_seq_num << 4);
1103
1104         ieee80211_sta_tx(dev, skb, 0);
1105 }
1106
1107 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1108                                                 struct ieee80211_mgmt *mgmt,
1109                                                 size_t len)
1110 {
1111         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1112         struct ieee80211_hw *hw = &local->hw;
1113         struct ieee80211_conf *conf = &hw->conf;
1114         struct sta_info *sta;
1115         struct tid_ampdu_rx *tid_agg_rx;
1116         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1117         u8 dialog_token;
1118         int ret = -EOPNOTSUPP;
1119         DECLARE_MAC_BUF(mac);
1120
1121         sta = sta_info_get(local, mgmt->sa);
1122         if (!sta)
1123                 return;
1124
1125         /* extract session parameters from addba request frame */
1126         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1127         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1128         start_seq_num =
1129                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1130
1131         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1132         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1133         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1134         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1135
1136         status = WLAN_STATUS_REQUEST_DECLINED;
1137
1138         /* sanity check for incoming parameters:
1139          * check if configuration can support the BA policy
1140          * and if buffer size does not exceeds max value */
1141         if (((ba_policy != 1)
1142                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1143                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1144                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1145 #ifdef CONFIG_MAC80211_HT_DEBUG
1146                 if (net_ratelimit())
1147                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1148                                 "%s on tid %u. policy %d, buffer size %d\n",
1149                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1150                                 buf_size);
1151 #endif /* CONFIG_MAC80211_HT_DEBUG */
1152                 goto end_no_lock;
1153         }
1154         /* determine default buffer size */
1155         if (buf_size == 0) {
1156                 struct ieee80211_supported_band *sband;
1157
1158                 sband = local->hw.wiphy->bands[conf->channel->band];
1159                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1160                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1161         }
1162
1163         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1164
1165         /* examine state machine */
1166         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1167
1168         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1169 #ifdef CONFIG_MAC80211_HT_DEBUG
1170                 if (net_ratelimit())
1171                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1172                                 "%s on tid %u\n",
1173                                 print_mac(mac, mgmt->sa), tid);
1174 #endif /* CONFIG_MAC80211_HT_DEBUG */
1175                 goto end;
1176         }
1177
1178         /* prepare reordering buffer */
1179         tid_agg_rx->reorder_buf =
1180                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1181         if (!tid_agg_rx->reorder_buf) {
1182                 if (net_ratelimit())
1183                         printk(KERN_ERR "can not allocate reordering buffer "
1184                                "to tid %d\n", tid);
1185                 goto end;
1186         }
1187         memset(tid_agg_rx->reorder_buf, 0,
1188                 buf_size * sizeof(struct sk_buf *));
1189
1190         if (local->ops->ampdu_action)
1191                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1192                                                sta->addr, tid, &start_seq_num);
1193 #ifdef CONFIG_MAC80211_HT_DEBUG
1194         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1195 #endif /* CONFIG_MAC80211_HT_DEBUG */
1196
1197         if (ret) {
1198                 kfree(tid_agg_rx->reorder_buf);
1199                 goto end;
1200         }
1201
1202         /* change state and send addba resp */
1203         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1204         tid_agg_rx->dialog_token = dialog_token;
1205         tid_agg_rx->ssn = start_seq_num;
1206         tid_agg_rx->head_seq_num = start_seq_num;
1207         tid_agg_rx->buf_size = buf_size;
1208         tid_agg_rx->timeout = timeout;
1209         tid_agg_rx->stored_mpdu_num = 0;
1210         status = WLAN_STATUS_SUCCESS;
1211 end:
1212         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1213
1214 end_no_lock:
1215         ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1216                                 status, 1, buf_size, timeout);
1217         sta_info_put(sta);
1218 }
1219
1220 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1221                                              struct ieee80211_mgmt *mgmt,
1222                                              size_t len)
1223 {
1224         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1225         struct ieee80211_hw *hw = &local->hw;
1226         struct sta_info *sta;
1227         u16 capab;
1228         u16 tid;
1229         u8 *state;
1230
1231         sta = sta_info_get(local, mgmt->sa);
1232         if (!sta)
1233                 return;
1234
1235         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1236         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1237
1238         state = &sta->ampdu_mlme.tid_tx[tid].state;
1239
1240         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1241
1242         if (mgmt->u.action.u.addba_resp.dialog_token !=
1243                 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1244                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1245 #ifdef CONFIG_MAC80211_HT_DEBUG
1246                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1247 #endif /* CONFIG_MAC80211_HT_DEBUG */
1248                 sta_info_put(sta);
1249                 return;
1250         }
1251
1252         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1253 #ifdef CONFIG_MAC80211_HT_DEBUG
1254         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1255 #endif /* CONFIG_MAC80211_HT_DEBUG */
1256         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1257                         == WLAN_STATUS_SUCCESS) {
1258                 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1259                         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1260                         printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1261                                 "%d\n", *state);
1262                         sta_info_put(sta);
1263                         return;
1264                 }
1265
1266                 if (*state & HT_ADDBA_RECEIVED_MSK)
1267                         printk(KERN_DEBUG "double addBA response\n");
1268
1269                 *state |= HT_ADDBA_RECEIVED_MSK;
1270                 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1271
1272                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1273                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1274                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1275                 }
1276
1277                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1278                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1279         } else {
1280                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1281
1282                 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1283                 /* this will allow the state check in stop_BA_session */
1284                 *state = HT_AGG_STATE_OPERATIONAL;
1285                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1286                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1287                                              WLAN_BACK_INITIATOR);
1288         }
1289         sta_info_put(sta);
1290 }
1291
1292 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1293                           u16 initiator, u16 reason_code)
1294 {
1295         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1296         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1297         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1298         struct sk_buff *skb;
1299         struct ieee80211_mgmt *mgmt;
1300         u16 params;
1301
1302         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1303                                         sizeof(mgmt->u.action.u.delba));
1304
1305         if (!skb) {
1306                 printk(KERN_ERR "%s: failed to allocate buffer "
1307                                         "for delba frame\n", dev->name);
1308                 return;
1309         }
1310
1311         skb_reserve(skb, local->hw.extra_tx_headroom);
1312         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1313         memset(mgmt, 0, 24);
1314         memcpy(mgmt->da, da, ETH_ALEN);
1315         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1316         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1317                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1318         else
1319                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1320         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1321                                         IEEE80211_STYPE_ACTION);
1322
1323         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1324
1325         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1326         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1327         params = (u16)(initiator << 11);        /* bit 11 initiator */
1328         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1329
1330         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1331         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1332
1333         ieee80211_sta_tx(dev, skb, 0);
1334 }
1335
1336 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1337                                         u16 initiator, u16 reason)
1338 {
1339         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1340         struct ieee80211_hw *hw = &local->hw;
1341         struct sta_info *sta;
1342         int ret, i;
1343
1344         sta = sta_info_get(local, ra);
1345         if (!sta)
1346                 return;
1347
1348         /* check if TID is in operational state */
1349         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1350         if (sta->ampdu_mlme.tid_rx[tid].state
1351                                 != HT_AGG_STATE_OPERATIONAL) {
1352                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1353                 sta_info_put(sta);
1354                 return;
1355         }
1356         sta->ampdu_mlme.tid_rx[tid].state =
1357                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1358                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1359                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1360
1361         /* stop HW Rx aggregation. ampdu_action existence
1362          * already verified in session init so we add the BUG_ON */
1363         BUG_ON(!local->ops->ampdu_action);
1364
1365         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1366                                         ra, tid, NULL);
1367         if (ret)
1368                 printk(KERN_DEBUG "HW problem - can not stop rx "
1369                                 "aggergation for tid %d\n", tid);
1370
1371         /* shutdown timer has not expired */
1372         if (initiator != WLAN_BACK_TIMER)
1373                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1374                                         session_timer);
1375
1376         /* check if this is a self generated aggregation halt */
1377         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1378                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1379
1380         /* free the reordering buffer */
1381         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1382                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1383                         /* release the reordered frames */
1384                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1385                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1386                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1387                 }
1388         }
1389         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1390
1391         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1392         sta_info_put(sta);
1393 }
1394
1395
1396 static void ieee80211_sta_process_delba(struct net_device *dev,
1397                         struct ieee80211_mgmt *mgmt, size_t len)
1398 {
1399         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1400         struct sta_info *sta;
1401         u16 tid, params;
1402         u16 initiator;
1403         DECLARE_MAC_BUF(mac);
1404
1405         sta = sta_info_get(local, mgmt->sa);
1406         if (!sta)
1407                 return;
1408
1409         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1410         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1411         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1412
1413 #ifdef CONFIG_MAC80211_HT_DEBUG
1414         if (net_ratelimit())
1415                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1416                         print_mac(mac, mgmt->sa),
1417                         initiator ? "recipient" : "initiator", tid,
1418                         mgmt->u.action.u.delba.reason_code);
1419 #endif /* CONFIG_MAC80211_HT_DEBUG */
1420
1421         if (initiator == WLAN_BACK_INITIATOR)
1422                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1423                                                  WLAN_BACK_INITIATOR, 0);
1424         else { /* WLAN_BACK_RECIPIENT */
1425                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1426                 sta->ampdu_mlme.tid_tx[tid].state =
1427                                 HT_AGG_STATE_OPERATIONAL;
1428                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1429                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1430                                              WLAN_BACK_RECIPIENT);
1431         }
1432         sta_info_put(sta);
1433 }
1434
1435 /*
1436  * After sending add Block Ack request we activated a timer until
1437  * add Block Ack response will arrive from the recipient.
1438  * If this timer expires sta_addba_resp_timer_expired will be executed.
1439  */
1440 void sta_addba_resp_timer_expired(unsigned long data)
1441 {
1442         /* not an elegant detour, but there is no choice as the timer passes
1443          * only one argument, and both sta_info and TID are needed, so init
1444          * flow in sta_info_add gives the TID as data, while the timer_to_id
1445          * array gives the sta through container_of */
1446         u16 tid = *(int *)data;
1447         struct sta_info *temp_sta = container_of((void *)data,
1448                 struct sta_info, timer_to_tid[tid]);
1449
1450         struct ieee80211_local *local = temp_sta->local;
1451         struct ieee80211_hw *hw = &local->hw;
1452         struct sta_info *sta;
1453         u8 *state;
1454
1455         sta = sta_info_get(local, temp_sta->addr);
1456         if (!sta)
1457                 return;
1458
1459         state = &sta->ampdu_mlme.tid_tx[tid].state;
1460         /* check if the TID waits for addBA response */
1461         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1462         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1463                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1464                 *state = HT_AGG_STATE_IDLE;
1465                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1466                                 "expecting addBA response there", tid);
1467                 goto timer_expired_exit;
1468         }
1469
1470         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1471
1472         /* go through the state check in stop_BA_session */
1473         *state = HT_AGG_STATE_OPERATIONAL;
1474         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1475         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1476                                      WLAN_BACK_INITIATOR);
1477
1478 timer_expired_exit:
1479         sta_info_put(sta);
1480 }
1481
1482 /*
1483  * After receiving Block Ack Request (BAR) we activated a
1484  * timer after each frame arrives from the originator.
1485  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1486  */
1487 void sta_rx_agg_session_timer_expired(unsigned long data)
1488 {
1489         /* not an elegant detour, but there is no choice as the timer passes
1490          * only one argument, and verious sta_info are needed here, so init
1491          * flow in sta_info_add gives the TID as data, while the timer_to_id
1492          * array gives the sta through container_of */
1493         u8 *ptid = (u8 *)data;
1494         u8 *timer_to_id = ptid - *ptid;
1495         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1496                                          timer_to_tid[0]);
1497
1498         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1499         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1500                                          WLAN_BACK_TIMER,
1501                                          WLAN_REASON_QSTA_TIMEOUT);
1502 }
1503
1504
1505 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1506                                    struct ieee80211_if_sta *ifsta,
1507                                    struct ieee80211_mgmt *mgmt,
1508                                    size_t len)
1509 {
1510         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1511         u16 auth_alg, auth_transaction, status_code;
1512         DECLARE_MAC_BUF(mac);
1513
1514         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1515             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1516                 printk(KERN_DEBUG "%s: authentication frame received from "
1517                        "%s, but not in authenticate state - ignored\n",
1518                        dev->name, print_mac(mac, mgmt->sa));
1519                 return;
1520         }
1521
1522         if (len < 24 + 6) {
1523                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1524                        "received from %s - ignored\n",
1525                        dev->name, len, print_mac(mac, mgmt->sa));
1526                 return;
1527         }
1528
1529         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1530             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1531                 printk(KERN_DEBUG "%s: authentication frame received from "
1532                        "unknown AP (SA=%s BSSID=%s) - "
1533                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1534                        print_mac(mac, mgmt->bssid));
1535                 return;
1536         }
1537
1538         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1539             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1540                 printk(KERN_DEBUG "%s: authentication frame received from "
1541                        "unknown BSSID (SA=%s BSSID=%s) - "
1542                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1543                        print_mac(mac, mgmt->bssid));
1544                 return;
1545         }
1546
1547         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1548         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1549         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1550
1551         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1552                "transaction=%d status=%d)\n",
1553                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1554                auth_transaction, status_code);
1555
1556         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1557                 /* IEEE 802.11 standard does not require authentication in IBSS
1558                  * networks and most implementations do not seem to use it.
1559                  * However, try to reply to authentication attempts if someone
1560                  * has actually implemented this.
1561                  * TODO: Could implement shared key authentication. */
1562                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1563                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1564                                "frame (alg=%d transaction=%d)\n",
1565                                dev->name, auth_alg, auth_transaction);
1566                         return;
1567                 }
1568                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1569         }
1570
1571         if (auth_alg != ifsta->auth_alg ||
1572             auth_transaction != ifsta->auth_transaction) {
1573                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1574                        "(alg=%d transaction=%d)\n",
1575                        dev->name, auth_alg, auth_transaction);
1576                 return;
1577         }
1578
1579         if (status_code != WLAN_STATUS_SUCCESS) {
1580                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1581                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1582                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1583                         u8 algs[3];
1584                         const int num_algs = ARRAY_SIZE(algs);
1585                         int i, pos;
1586                         algs[0] = algs[1] = algs[2] = 0xff;
1587                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1588                                 algs[0] = WLAN_AUTH_OPEN;
1589                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1590                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1591                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1592                                 algs[2] = WLAN_AUTH_LEAP;
1593                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1594                                 pos = 0;
1595                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1596                                 pos = 1;
1597                         else
1598                                 pos = 2;
1599                         for (i = 0; i < num_algs; i++) {
1600                                 pos++;
1601                                 if (pos >= num_algs)
1602                                         pos = 0;
1603                                 if (algs[pos] == ifsta->auth_alg ||
1604                                     algs[pos] == 0xff)
1605                                         continue;
1606                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1607                                     !ieee80211_sta_wep_configured(dev))
1608                                         continue;
1609                                 ifsta->auth_alg = algs[pos];
1610                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1611                                        "next try\n",
1612                                        dev->name, ifsta->auth_alg);
1613                                 break;
1614                         }
1615                 }
1616                 return;
1617         }
1618
1619         switch (ifsta->auth_alg) {
1620         case WLAN_AUTH_OPEN:
1621         case WLAN_AUTH_LEAP:
1622                 ieee80211_auth_completed(dev, ifsta);
1623                 break;
1624         case WLAN_AUTH_SHARED_KEY:
1625                 if (ifsta->auth_transaction == 4)
1626                         ieee80211_auth_completed(dev, ifsta);
1627                 else
1628                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1629                 break;
1630         }
1631 }
1632
1633
1634 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1635                                      struct ieee80211_if_sta *ifsta,
1636                                      struct ieee80211_mgmt *mgmt,
1637                                      size_t len)
1638 {
1639         u16 reason_code;
1640         DECLARE_MAC_BUF(mac);
1641
1642         if (len < 24 + 2) {
1643                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1644                        "received from %s - ignored\n",
1645                        dev->name, len, print_mac(mac, mgmt->sa));
1646                 return;
1647         }
1648
1649         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1650                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1651                        "unknown AP (SA=%s BSSID=%s) - "
1652                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1653                        print_mac(mac, mgmt->bssid));
1654                 return;
1655         }
1656
1657         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1658
1659         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1660                " (reason=%d)\n",
1661                dev->name, print_mac(mac, mgmt->sa), reason_code);
1662
1663         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1664                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1665         }
1666
1667         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1668             ifsta->state == IEEE80211_ASSOCIATE ||
1669             ifsta->state == IEEE80211_ASSOCIATED) {
1670                 ifsta->state = IEEE80211_AUTHENTICATE;
1671                 mod_timer(&ifsta->timer, jiffies +
1672                                       IEEE80211_RETRY_AUTH_INTERVAL);
1673         }
1674
1675         ieee80211_set_disassoc(dev, ifsta, 1);
1676         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1677 }
1678
1679
1680 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1681                                        struct ieee80211_if_sta *ifsta,
1682                                        struct ieee80211_mgmt *mgmt,
1683                                        size_t len)
1684 {
1685         u16 reason_code;
1686         DECLARE_MAC_BUF(mac);
1687
1688         if (len < 24 + 2) {
1689                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1690                        "received from %s - ignored\n",
1691                        dev->name, len, print_mac(mac, mgmt->sa));
1692                 return;
1693         }
1694
1695         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1696                 printk(KERN_DEBUG "%s: disassociation frame received from "
1697                        "unknown AP (SA=%s BSSID=%s) - "
1698                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1699                        print_mac(mac, mgmt->bssid));
1700                 return;
1701         }
1702
1703         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1704
1705         printk(KERN_DEBUG "%s: RX disassociation from %s"
1706                " (reason=%d)\n",
1707                dev->name, print_mac(mac, mgmt->sa), reason_code);
1708
1709         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1710                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1711
1712         if (ifsta->state == IEEE80211_ASSOCIATED) {
1713                 ifsta->state = IEEE80211_ASSOCIATE;
1714                 mod_timer(&ifsta->timer, jiffies +
1715                                       IEEE80211_RETRY_AUTH_INTERVAL);
1716         }
1717
1718         ieee80211_set_disassoc(dev, ifsta, 0);
1719 }
1720
1721
1722 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1723                                          struct ieee80211_if_sta *ifsta,
1724                                          struct ieee80211_mgmt *mgmt,
1725                                          size_t len,
1726                                          int reassoc)
1727 {
1728         struct ieee80211_local *local = sdata->local;
1729         struct net_device *dev = sdata->dev;
1730         struct ieee80211_supported_band *sband;
1731         struct sta_info *sta;
1732         u64 rates, basic_rates;
1733         u16 capab_info, status_code, aid;
1734         struct ieee802_11_elems elems;
1735         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1736         u8 *pos;
1737         int i, j;
1738         DECLARE_MAC_BUF(mac);
1739         bool have_higher_than_11mbit = false;
1740
1741         /* AssocResp and ReassocResp have identical structure, so process both
1742          * of them in this function. */
1743
1744         if (ifsta->state != IEEE80211_ASSOCIATE) {
1745                 printk(KERN_DEBUG "%s: association frame received from "
1746                        "%s, but not in associate state - ignored\n",
1747                        dev->name, print_mac(mac, mgmt->sa));
1748                 return;
1749         }
1750
1751         if (len < 24 + 6) {
1752                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1753                        "received from %s - ignored\n",
1754                        dev->name, len, print_mac(mac, mgmt->sa));
1755                 return;
1756         }
1757
1758         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1759                 printk(KERN_DEBUG "%s: association frame received from "
1760                        "unknown AP (SA=%s BSSID=%s) - "
1761                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1762                        print_mac(mac, mgmt->bssid));
1763                 return;
1764         }
1765
1766         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1767         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1768         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1769
1770         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1771                "status=%d aid=%d)\n",
1772                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1773                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1774
1775         if (status_code != WLAN_STATUS_SUCCESS) {
1776                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1777                        dev->name, status_code);
1778                 /* if this was a reassociation, ensure we try a "full"
1779                  * association next time. This works around some broken APs
1780                  * which do not correctly reject reassociation requests. */
1781                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1782                 return;
1783         }
1784
1785         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1786                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1787                        "set\n", dev->name, aid);
1788         aid &= ~(BIT(15) | BIT(14));
1789
1790         pos = mgmt->u.assoc_resp.variable;
1791         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1792
1793         if (!elems.supp_rates) {
1794                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1795                        dev->name);
1796                 return;
1797         }
1798
1799         printk(KERN_DEBUG "%s: associated\n", dev->name);
1800         ifsta->aid = aid;
1801         ifsta->ap_capab = capab_info;
1802
1803         kfree(ifsta->assocresp_ies);
1804         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1805         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1806         if (ifsta->assocresp_ies)
1807                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1808
1809         /* Add STA entry for the AP */
1810         sta = sta_info_get(local, ifsta->bssid);
1811         if (!sta) {
1812                 struct ieee80211_sta_bss *bss;
1813                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1814                 if (!sta) {
1815                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1816                                " AP\n", dev->name);
1817                         return;
1818                 }
1819                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1820                                            local->hw.conf.channel->center_freq,
1821                                            ifsta->ssid, ifsta->ssid_len);
1822                 if (bss) {
1823                         sta->last_rssi = bss->rssi;
1824                         sta->last_signal = bss->signal;
1825                         sta->last_noise = bss->noise;
1826                         ieee80211_rx_bss_put(dev, bss);
1827                 }
1828         }
1829
1830         sta->dev = dev;
1831         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1832                       WLAN_STA_AUTHORIZED;
1833
1834         rates = 0;
1835         basic_rates = 0;
1836         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1837
1838         for (i = 0; i < elems.supp_rates_len; i++) {
1839                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1840
1841                 if (rate > 110)
1842                         have_higher_than_11mbit = true;
1843
1844                 for (j = 0; j < sband->n_bitrates; j++) {
1845                         if (sband->bitrates[j].bitrate == rate)
1846                                 rates |= BIT(j);
1847                         if (elems.supp_rates[i] & 0x80)
1848                                 basic_rates |= BIT(j);
1849                 }
1850         }
1851
1852         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1853                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1854
1855                 if (rate > 110)
1856                         have_higher_than_11mbit = true;
1857
1858                 for (j = 0; j < sband->n_bitrates; j++) {
1859                         if (sband->bitrates[j].bitrate == rate)
1860                                 rates |= BIT(j);
1861                         if (elems.ext_supp_rates[i] & 0x80)
1862                                 basic_rates |= BIT(j);
1863                 }
1864         }
1865
1866         sta->supp_rates[local->hw.conf.channel->band] = rates;
1867         sdata->basic_rates = basic_rates;
1868
1869         /* cf. IEEE 802.11 9.2.12 */
1870         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1871             have_higher_than_11mbit)
1872                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1873         else
1874                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1875
1876         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1877             local->ops->conf_ht) {
1878                 struct ieee80211_ht_bss_info bss_info;
1879
1880                 ieee80211_ht_cap_ie_to_ht_info(
1881                                 (struct ieee80211_ht_cap *)
1882                                 elems.ht_cap_elem, &sta->ht_info);
1883                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1884                                 (struct ieee80211_ht_addt_info *)
1885                                 elems.ht_info_elem, &bss_info);
1886                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1887         }
1888
1889         rate_control_rate_init(sta, local);
1890
1891         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1892                 sta->flags |= WLAN_STA_WME;
1893                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1894                                          elems.wmm_param_len);
1895         }
1896
1897         /* set AID, ieee80211_set_associated() will tell the driver */
1898         bss_conf->aid = aid;
1899         ieee80211_set_associated(dev, ifsta, 1);
1900
1901         sta_info_put(sta);
1902
1903         ieee80211_associated(dev, ifsta);
1904 }
1905
1906
1907 /* Caller must hold local->sta_bss_lock */
1908 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1909                                         struct ieee80211_sta_bss *bss)
1910 {
1911         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1912         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1913         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1914 }
1915
1916
1917 /* Caller must hold local->sta_bss_lock */
1918 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1919                                         struct ieee80211_sta_bss *bss)
1920 {
1921         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1922         struct ieee80211_sta_bss *b, *prev = NULL;
1923         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1924         while (b) {
1925                 if (b == bss) {
1926                         if (!prev)
1927                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1928                                         bss->hnext;
1929                         else
1930                                 prev->hnext = bss->hnext;
1931                         break;
1932                 }
1933                 prev = b;
1934                 b = b->hnext;
1935         }
1936 }
1937
1938
1939 static struct ieee80211_sta_bss *
1940 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1941                      u8 *ssid, u8 ssid_len)
1942 {
1943         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1944         struct ieee80211_sta_bss *bss;
1945
1946         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1947         if (!bss)
1948                 return NULL;
1949         atomic_inc(&bss->users);
1950         atomic_inc(&bss->users);
1951         memcpy(bss->bssid, bssid, ETH_ALEN);
1952         bss->freq = freq;
1953         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1954                 memcpy(bss->ssid, ssid, ssid_len);
1955                 bss->ssid_len = ssid_len;
1956         }
1957
1958         spin_lock_bh(&local->sta_bss_lock);
1959         /* TODO: order by RSSI? */
1960         list_add_tail(&bss->list, &local->sta_bss_list);
1961         __ieee80211_rx_bss_hash_add(dev, bss);
1962         spin_unlock_bh(&local->sta_bss_lock);
1963         return bss;
1964 }
1965
1966
1967 static struct ieee80211_sta_bss *
1968 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1969                      u8 *ssid, u8 ssid_len)
1970 {
1971         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1972         struct ieee80211_sta_bss *bss;
1973
1974         spin_lock_bh(&local->sta_bss_lock);
1975         bss = local->sta_bss_hash[STA_HASH(bssid)];
1976         while (bss) {
1977                 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1978                     bss->freq == freq &&
1979                     bss->ssid_len == ssid_len &&
1980                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1981                         atomic_inc(&bss->users);
1982                         break;
1983                 }
1984                 bss = bss->hnext;
1985         }
1986         spin_unlock_bh(&local->sta_bss_lock);
1987         return bss;
1988 }
1989
1990
1991 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1992 {
1993         kfree(bss->wpa_ie);
1994         kfree(bss->rsn_ie);
1995         kfree(bss->wmm_ie);
1996         kfree(bss->ht_ie);
1997         kfree(bss);
1998 }
1999
2000
2001 static void ieee80211_rx_bss_put(struct net_device *dev,
2002                                  struct ieee80211_sta_bss *bss)
2003 {
2004         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2005         if (!atomic_dec_and_test(&bss->users))
2006                 return;
2007
2008         spin_lock_bh(&local->sta_bss_lock);
2009         __ieee80211_rx_bss_hash_del(dev, bss);
2010         list_del(&bss->list);
2011         spin_unlock_bh(&local->sta_bss_lock);
2012         ieee80211_rx_bss_free(bss);
2013 }
2014
2015
2016 void ieee80211_rx_bss_list_init(struct net_device *dev)
2017 {
2018         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2019         spin_lock_init(&local->sta_bss_lock);
2020         INIT_LIST_HEAD(&local->sta_bss_list);
2021 }
2022
2023
2024 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2025 {
2026         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2027         struct ieee80211_sta_bss *bss, *tmp;
2028
2029         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2030                 ieee80211_rx_bss_put(dev, bss);
2031 }
2032
2033
2034 static void ieee80211_rx_bss_info(struct net_device *dev,
2035                                   struct ieee80211_mgmt *mgmt,
2036                                   size_t len,
2037                                   struct ieee80211_rx_status *rx_status,
2038                                   int beacon)
2039 {
2040         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2041         struct ieee802_11_elems elems;
2042         size_t baselen;
2043         int freq, clen;
2044         struct ieee80211_sta_bss *bss;
2045         struct sta_info *sta;
2046         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2047         u64 timestamp;
2048         DECLARE_MAC_BUF(mac);
2049         DECLARE_MAC_BUF(mac2);
2050
2051         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2052                 return; /* ignore ProbeResp to foreign address */
2053
2054 #if 0
2055         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2056                dev->name, beacon ? "Beacon" : "Probe Response",
2057                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2058 #endif
2059
2060         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2061         if (baselen > len)
2062                 return;
2063
2064         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2065
2066         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2067             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2068 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2069                 static unsigned long last_tsf_debug = 0;
2070                 u64 tsf;
2071                 if (local->ops->get_tsf)
2072                         tsf = local->ops->get_tsf(local_to_hw(local));
2073                 else
2074                         tsf = -1LLU;
2075                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
2076                         printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2077                                "%s TSF=0x%llx BCN=0x%llx diff=%lld "
2078                                "@%lu\n",
2079                                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
2080                                (unsigned long long)tsf,
2081                                (unsigned long long)timestamp,
2082                                (unsigned long long)(tsf - timestamp),
2083                                jiffies);
2084                         last_tsf_debug = jiffies;
2085                 }
2086 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2087         }
2088
2089         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2090
2091         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2092             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2093             (sta = sta_info_get(local, mgmt->sa))) {
2094                 struct ieee80211_supported_band *sband;
2095                 struct ieee80211_rate *bitrates;
2096                 size_t num_rates;
2097                 u64 supp_rates, prev_rates;
2098                 int i, j;
2099
2100                 sband = local->hw.wiphy->bands[rx_status->band];
2101
2102                 if (!sband) {
2103                         WARN_ON(1);
2104                         sband = local->hw.wiphy->bands[
2105                                         local->hw.conf.channel->band];
2106                 }
2107
2108                 bitrates = sband->bitrates;
2109                 num_rates = sband->n_bitrates;
2110
2111                 supp_rates = 0;
2112                 for (i = 0; i < elems.supp_rates_len +
2113                              elems.ext_supp_rates_len; i++) {
2114                         u8 rate = 0;
2115                         int own_rate;
2116                         if (i < elems.supp_rates_len)
2117                                 rate = elems.supp_rates[i];
2118                         else if (elems.ext_supp_rates)
2119                                 rate = elems.ext_supp_rates
2120                                         [i - elems.supp_rates_len];
2121                         own_rate = 5 * (rate & 0x7f);
2122                         for (j = 0; j < num_rates; j++)
2123                                 if (bitrates[j].bitrate == own_rate)
2124                                         supp_rates |= BIT(j);
2125                 }
2126
2127                 prev_rates = sta->supp_rates[rx_status->band];
2128                 sta->supp_rates[rx_status->band] &= supp_rates;
2129                 if (sta->supp_rates[rx_status->band] == 0) {
2130                         /* No matching rates - this should not really happen.
2131                          * Make sure that at least one rate is marked
2132                          * supported to avoid issues with TX rate ctrl. */
2133                         sta->supp_rates[rx_status->band] =
2134                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2135                 }
2136                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2137                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2138                                "%s based on beacon info (0x%llx & 0x%llx -> "
2139                                "0x%llx)\n",
2140                                dev->name, print_mac(mac, sta->addr),
2141                                (unsigned long long) prev_rates,
2142                                (unsigned long long) supp_rates,
2143                                (unsigned long long) sta->supp_rates[rx_status->band]);
2144                 }
2145                 sta_info_put(sta);
2146         }
2147
2148         if (!elems.ssid)
2149                 return;
2150
2151         if (elems.ds_params && elems.ds_params_len == 1)
2152                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2153         else
2154                 freq = rx_status->freq;
2155
2156         bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2157                                    elems.ssid, elems.ssid_len);
2158         if (!bss) {
2159                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2160                                            elems.ssid, elems.ssid_len);
2161                 if (!bss)
2162                         return;
2163         } else {
2164 #if 0
2165                 /* TODO: order by RSSI? */
2166                 spin_lock_bh(&local->sta_bss_lock);
2167                 list_move_tail(&bss->list, &local->sta_bss_list);
2168                 spin_unlock_bh(&local->sta_bss_lock);
2169 #endif
2170         }
2171
2172         bss->band = rx_status->band;
2173
2174         if (bss->probe_resp && beacon) {
2175                 /* Do not allow beacon to override data from Probe Response. */
2176                 ieee80211_rx_bss_put(dev, bss);
2177                 return;
2178         }
2179
2180         /* save the ERP value so that it is available at association time */
2181         if (elems.erp_info && elems.erp_info_len >= 1) {
2182                 bss->erp_value = elems.erp_info[0];
2183                 bss->has_erp_value = 1;
2184         }
2185
2186         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2187         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2188
2189         bss->supp_rates_len = 0;
2190         if (elems.supp_rates) {
2191                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2192                 if (clen > elems.supp_rates_len)
2193                         clen = elems.supp_rates_len;
2194                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2195                        clen);
2196                 bss->supp_rates_len += clen;
2197         }
2198         if (elems.ext_supp_rates) {
2199                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2200                 if (clen > elems.ext_supp_rates_len)
2201                         clen = elems.ext_supp_rates_len;
2202                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2203                        elems.ext_supp_rates, clen);
2204                 bss->supp_rates_len += clen;
2205         }
2206
2207         if (elems.wpa &&
2208             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2209              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2210                 kfree(bss->wpa_ie);
2211                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2212                 if (bss->wpa_ie) {
2213                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2214                         bss->wpa_ie_len = elems.wpa_len + 2;
2215                 } else
2216                         bss->wpa_ie_len = 0;
2217         } else if (!elems.wpa && bss->wpa_ie) {
2218                 kfree(bss->wpa_ie);
2219                 bss->wpa_ie = NULL;
2220                 bss->wpa_ie_len = 0;
2221         }
2222
2223         if (elems.rsn &&
2224             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2225              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2226                 kfree(bss->rsn_ie);
2227                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2228                 if (bss->rsn_ie) {
2229                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2230                         bss->rsn_ie_len = elems.rsn_len + 2;
2231                 } else
2232                         bss->rsn_ie_len = 0;
2233         } else if (!elems.rsn && bss->rsn_ie) {
2234                 kfree(bss->rsn_ie);
2235                 bss->rsn_ie = NULL;
2236                 bss->rsn_ie_len = 0;
2237         }
2238
2239         if (elems.wmm_param &&
2240             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2241              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2242                 kfree(bss->wmm_ie);
2243                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2244                 if (bss->wmm_ie) {
2245                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2246                                elems.wmm_param_len + 2);
2247                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2248                 } else
2249                         bss->wmm_ie_len = 0;
2250         } else if (!elems.wmm_param && bss->wmm_ie) {
2251                 kfree(bss->wmm_ie);
2252                 bss->wmm_ie = NULL;
2253                 bss->wmm_ie_len = 0;
2254         }
2255         if (elems.ht_cap_elem &&
2256             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2257              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2258                 kfree(bss->ht_ie);
2259                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2260                 if (bss->ht_ie) {
2261                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2262                                elems.ht_cap_elem_len + 2);
2263                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2264                 } else
2265                         bss->ht_ie_len = 0;
2266         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2267                 kfree(bss->ht_ie);
2268                 bss->ht_ie = NULL;
2269                 bss->ht_ie_len = 0;
2270         }
2271
2272         bss->timestamp = timestamp;
2273         bss->last_update = jiffies;
2274         bss->rssi = rx_status->ssi;
2275         bss->signal = rx_status->signal;
2276         bss->noise = rx_status->noise;
2277         if (!beacon)
2278                 bss->probe_resp++;
2279         ieee80211_rx_bss_put(dev, bss);
2280 }
2281
2282
2283 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2284                                          struct ieee80211_mgmt *mgmt,
2285                                          size_t len,
2286                                          struct ieee80211_rx_status *rx_status)
2287 {
2288         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2289 }
2290
2291
2292 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2293                                      struct ieee80211_mgmt *mgmt,
2294                                      size_t len,
2295                                      struct ieee80211_rx_status *rx_status)
2296 {
2297         struct ieee80211_sub_if_data *sdata;
2298         struct ieee80211_if_sta *ifsta;
2299         size_t baselen;
2300         struct ieee802_11_elems elems;
2301         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2302         struct ieee80211_conf *conf = &local->hw.conf;
2303         u32 changed = 0;
2304
2305         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2306
2307         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2308         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2309                 return;
2310         ifsta = &sdata->u.sta;
2311
2312         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2313             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2314                 return;
2315
2316         /* Process beacon from the current BSS */
2317         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2318         if (baselen > len)
2319                 return;
2320
2321         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2322
2323         if (elems.erp_info && elems.erp_info_len >= 1)
2324                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2325
2326         if (elems.ht_cap_elem && elems.ht_info_elem &&
2327             elems.wmm_param && local->ops->conf_ht &&
2328             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2329                 struct ieee80211_ht_bss_info bss_info;
2330
2331                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2332                                 (struct ieee80211_ht_addt_info *)
2333                                 elems.ht_info_elem, &bss_info);
2334                 /* check if AP changed bss inforamation */
2335                 if ((conf->ht_bss_conf.primary_channel !=
2336                      bss_info.primary_channel) ||
2337                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2338                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2339                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2340                                                 &bss_info);
2341         }
2342
2343         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2344                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2345                                          elems.wmm_param_len);
2346         }
2347
2348         ieee80211_bss_info_change_notify(sdata, changed);
2349 }
2350
2351
2352 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2353                                         struct ieee80211_if_sta *ifsta,
2354                                         struct ieee80211_mgmt *mgmt,
2355                                         size_t len,
2356                                         struct ieee80211_rx_status *rx_status)
2357 {
2358         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2359         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2360         int tx_last_beacon;
2361         struct sk_buff *skb;
2362         struct ieee80211_mgmt *resp;
2363         u8 *pos, *end;
2364         DECLARE_MAC_BUF(mac);
2365 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2366         DECLARE_MAC_BUF(mac2);
2367         DECLARE_MAC_BUF(mac3);
2368 #endif
2369
2370         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2371             ifsta->state != IEEE80211_IBSS_JOINED ||
2372             len < 24 + 2 || !ifsta->probe_resp)
2373                 return;
2374
2375         if (local->ops->tx_last_beacon)
2376                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2377         else
2378                 tx_last_beacon = 1;
2379
2380 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2381         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2382                "%s (tx_last_beacon=%d)\n",
2383                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2384                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2385 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2386
2387         if (!tx_last_beacon)
2388                 return;
2389
2390         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2391             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2392                 return;
2393
2394         end = ((u8 *) mgmt) + len;
2395         pos = mgmt->u.probe_req.variable;
2396         if (pos[0] != WLAN_EID_SSID ||
2397             pos + 2 + pos[1] > end) {
2398                 if (net_ratelimit()) {
2399                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2400                                "from %s\n",
2401                                dev->name, print_mac(mac, mgmt->sa));
2402                 }
2403                 return;
2404         }
2405         if (pos[1] != 0 &&
2406             (pos[1] != ifsta->ssid_len ||
2407              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2408                 /* Ignore ProbeReq for foreign SSID */
2409                 return;
2410         }
2411
2412         /* Reply with ProbeResp */
2413         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2414         if (!skb)
2415                 return;
2416
2417         resp = (struct ieee80211_mgmt *) skb->data;
2418         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2419 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2420         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2421                dev->name, print_mac(mac, resp->da));
2422 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2423         ieee80211_sta_tx(dev, skb, 0);
2424 }
2425
2426 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2427                                      struct ieee80211_if_sta *ifsta,
2428                                      struct ieee80211_mgmt *mgmt,
2429                                      size_t len)
2430 {
2431         if (len < IEEE80211_MIN_ACTION_SIZE)
2432                 return;
2433
2434         switch (mgmt->u.action.category) {
2435         case WLAN_CATEGORY_BACK:
2436                 switch (mgmt->u.action.u.addba_req.action_code) {
2437                 case WLAN_ACTION_ADDBA_REQ:
2438                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2439                                    sizeof(mgmt->u.action.u.addba_req)))
2440                                 break;
2441                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2442                         break;
2443                 case WLAN_ACTION_ADDBA_RESP:
2444                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2445                                    sizeof(mgmt->u.action.u.addba_resp)))
2446                                 break;
2447                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2448                         break;
2449                 case WLAN_ACTION_DELBA:
2450                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2451                                    sizeof(mgmt->u.action.u.delba)))
2452                                 break;
2453                         ieee80211_sta_process_delba(dev, mgmt, len);
2454                         break;
2455                 default:
2456                         if (net_ratelimit())
2457                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2458                                         dev->name);
2459                         break;
2460                 }
2461                 break;
2462         default:
2463                 break;
2464         }
2465 }
2466
2467 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2468                            struct ieee80211_rx_status *rx_status)
2469 {
2470         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2471         struct ieee80211_sub_if_data *sdata;
2472         struct ieee80211_if_sta *ifsta;
2473         struct ieee80211_mgmt *mgmt;
2474         u16 fc;
2475
2476         if (skb->len < 24)
2477                 goto fail;
2478
2479         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2480         ifsta = &sdata->u.sta;
2481
2482         mgmt = (struct ieee80211_mgmt *) skb->data;
2483         fc = le16_to_cpu(mgmt->frame_control);
2484
2485         switch (fc & IEEE80211_FCTL_STYPE) {
2486         case IEEE80211_STYPE_PROBE_REQ:
2487         case IEEE80211_STYPE_PROBE_RESP:
2488         case IEEE80211_STYPE_BEACON:
2489                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2490         case IEEE80211_STYPE_AUTH:
2491         case IEEE80211_STYPE_ASSOC_RESP:
2492         case IEEE80211_STYPE_REASSOC_RESP:
2493         case IEEE80211_STYPE_DEAUTH:
2494         case IEEE80211_STYPE_DISASSOC:
2495         case IEEE80211_STYPE_ACTION:
2496                 skb_queue_tail(&ifsta->skb_queue, skb);
2497                 queue_work(local->hw.workqueue, &ifsta->work);
2498                 return;
2499         default:
2500                 printk(KERN_DEBUG "%s: received unknown management frame - "
2501                        "stype=%d\n", dev->name,
2502                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2503                 break;
2504         }
2505
2506  fail:
2507         kfree_skb(skb);
2508 }
2509
2510
2511 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2512                                          struct sk_buff *skb)
2513 {
2514         struct ieee80211_rx_status *rx_status;
2515         struct ieee80211_sub_if_data *sdata;
2516         struct ieee80211_if_sta *ifsta;
2517         struct ieee80211_mgmt *mgmt;
2518         u16 fc;
2519
2520         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2521         ifsta = &sdata->u.sta;
2522
2523         rx_status = (struct ieee80211_rx_status *) skb->cb;
2524         mgmt = (struct ieee80211_mgmt *) skb->data;
2525         fc = le16_to_cpu(mgmt->frame_control);
2526
2527         switch (fc & IEEE80211_FCTL_STYPE) {
2528         case IEEE80211_STYPE_PROBE_REQ:
2529                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2530                                             rx_status);
2531                 break;
2532         case IEEE80211_STYPE_PROBE_RESP:
2533                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2534                 break;
2535         case IEEE80211_STYPE_BEACON:
2536                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2537                 break;
2538         case IEEE80211_STYPE_AUTH:
2539                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2540                 break;
2541         case IEEE80211_STYPE_ASSOC_RESP:
2542                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2543                 break;
2544         case IEEE80211_STYPE_REASSOC_RESP:
2545                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2546                 break;
2547         case IEEE80211_STYPE_DEAUTH:
2548                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2549                 break;
2550         case IEEE80211_STYPE_DISASSOC:
2551                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2552                 break;
2553         case IEEE80211_STYPE_ACTION:
2554                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2555                 break;
2556         }
2557
2558         kfree_skb(skb);
2559 }
2560
2561
2562 ieee80211_rx_result
2563 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2564                       struct ieee80211_rx_status *rx_status)
2565 {
2566         struct ieee80211_mgmt *mgmt;
2567         u16 fc;
2568
2569         if (skb->len < 2)
2570                 return RX_DROP;
2571
2572         mgmt = (struct ieee80211_mgmt *) skb->data;
2573         fc = le16_to_cpu(mgmt->frame_control);
2574
2575         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2576                 return RX_CONTINUE;
2577
2578         if (skb->len < 24)
2579                 return RX_DROP;
2580
2581         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2582                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2583                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2584                                                      skb->len, rx_status);
2585                         dev_kfree_skb(skb);
2586                         return RX_QUEUED;
2587                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2588                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2589                                                  rx_status);
2590                         dev_kfree_skb(skb);
2591                         return RX_QUEUED;
2592                 }
2593         }
2594         return RX_CONTINUE;
2595 }
2596
2597
2598 static int ieee80211_sta_active_ibss(struct net_device *dev)
2599 {
2600         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2601         int active = 0;
2602         struct sta_info *sta;
2603
2604         read_lock_bh(&local->sta_lock);
2605         list_for_each_entry(sta, &local->sta_list, list) {
2606                 if (sta->dev == dev &&
2607                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2608                                jiffies)) {
2609                         active++;
2610                         break;
2611                 }
2612         }
2613         read_unlock_bh(&local->sta_lock);
2614
2615         return active;
2616 }
2617
2618
2619 static void ieee80211_sta_expire(struct net_device *dev)
2620 {
2621         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2622         struct sta_info *sta, *tmp;
2623         LIST_HEAD(tmp_list);
2624         DECLARE_MAC_BUF(mac);
2625
2626         write_lock_bh(&local->sta_lock);
2627         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2628                 if (time_after(jiffies, sta->last_rx +
2629                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2630                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2631                                dev->name, print_mac(mac, sta->addr));
2632                         __sta_info_get(sta);
2633                         sta_info_remove(sta);
2634                         list_add(&sta->list, &tmp_list);
2635                 }
2636         write_unlock_bh(&local->sta_lock);
2637
2638         list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2639                 sta_info_free(sta);
2640                 sta_info_put(sta);
2641         }
2642 }
2643
2644
2645 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2646                                      struct ieee80211_if_sta *ifsta)
2647 {
2648         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2649
2650         ieee80211_sta_expire(dev);
2651         if (ieee80211_sta_active_ibss(dev))
2652                 return;
2653
2654         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2655                "IBSS networks with same SSID (merge)\n", dev->name);
2656         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2657 }
2658
2659
2660 void ieee80211_sta_timer(unsigned long data)
2661 {
2662         struct ieee80211_sub_if_data *sdata =
2663                 (struct ieee80211_sub_if_data *) data;
2664         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2665         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2666
2667         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2668         queue_work(local->hw.workqueue, &ifsta->work);
2669 }
2670
2671
2672 void ieee80211_sta_work(struct work_struct *work)
2673 {
2674         struct ieee80211_sub_if_data *sdata =
2675                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2676         struct net_device *dev = sdata->dev;
2677         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2678         struct ieee80211_if_sta *ifsta;
2679         struct sk_buff *skb;
2680
2681         if (!netif_running(dev))
2682                 return;
2683
2684         if (local->sta_sw_scanning || local->sta_hw_scanning)
2685                 return;
2686
2687         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2688             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2689                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2690                        "(type=%d)\n", dev->name, sdata->vif.type);
2691                 return;
2692         }
2693         ifsta = &sdata->u.sta;
2694
2695         while ((skb = skb_dequeue(&ifsta->skb_queue)))
2696                 ieee80211_sta_rx_queued_mgmt(dev, skb);
2697
2698         if (ifsta->state != IEEE80211_AUTHENTICATE &&
2699             ifsta->state != IEEE80211_ASSOCIATE &&
2700             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2701                 if (ifsta->scan_ssid_len)
2702                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2703                 else
2704                         ieee80211_sta_start_scan(dev, NULL, 0);
2705                 return;
2706         }
2707
2708         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2709                 if (ieee80211_sta_config_auth(dev, ifsta))
2710                         return;
2711                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2712         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2713                 return;
2714
2715         switch (ifsta->state) {
2716         case IEEE80211_DISABLED:
2717                 break;
2718         case IEEE80211_AUTHENTICATE:
2719                 ieee80211_authenticate(dev, ifsta);
2720                 break;
2721         case IEEE80211_ASSOCIATE:
2722                 ieee80211_associate(dev, ifsta);
2723                 break;
2724         case IEEE80211_ASSOCIATED:
2725                 ieee80211_associated(dev, ifsta);
2726                 break;
2727         case IEEE80211_IBSS_SEARCH:
2728                 ieee80211_sta_find_ibss(dev, ifsta);
2729                 break;
2730         case IEEE80211_IBSS_JOINED:
2731                 ieee80211_sta_merge_ibss(dev, ifsta);
2732                 break;
2733         default:
2734                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2735                        ifsta->state);
2736                 break;
2737         }
2738
2739         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2740                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2741                        "mixed-cell disabled - disassociate\n", dev->name);
2742
2743                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2744                 ieee80211_set_disassoc(dev, ifsta, 0);
2745         }
2746 }
2747
2748
2749 static void ieee80211_sta_reset_auth(struct net_device *dev,
2750                                      struct ieee80211_if_sta *ifsta)
2751 {
2752         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2753
2754         if (local->ops->reset_tsf) {
2755                 /* Reset own TSF to allow time synchronization work. */
2756                 local->ops->reset_tsf(local_to_hw(local));
2757         }
2758
2759         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2760
2761
2762         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2763                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2764         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2765                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2766         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2767                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2768         else
2769                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2770         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2771                ifsta->auth_alg);
2772         ifsta->auth_transaction = -1;
2773         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2774         ifsta->auth_tries = ifsta->assoc_tries = 0;
2775         netif_carrier_off(dev);
2776 }
2777
2778
2779 void ieee80211_sta_req_auth(struct net_device *dev,
2780                             struct ieee80211_if_sta *ifsta)
2781 {
2782         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2783         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2784
2785         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2786                 return;
2787
2788         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2789                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2790             (ifsta->flags & (IEEE80211_STA_SSID_SET |
2791                                 IEEE80211_STA_AUTO_SSID_SEL))) {
2792                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2793                 queue_work(local->hw.workqueue, &ifsta->work);
2794         }
2795 }
2796
2797 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2798                                     const char *ssid, int ssid_len)
2799 {
2800         int tmp, hidden_ssid;
2801
2802         if (ssid_len == ifsta->ssid_len &&
2803             !memcmp(ifsta->ssid, ssid, ssid_len))
2804                 return 1;
2805
2806         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2807                 return 0;
2808
2809         hidden_ssid = 1;
2810         tmp = ssid_len;
2811         while (tmp--) {
2812                 if (ssid[tmp] != '\0') {
2813                         hidden_ssid = 0;
2814                         break;
2815                 }
2816         }
2817
2818         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2819                 return 1;
2820
2821         if (ssid_len == 1 && ssid[0] == ' ')
2822                 return 1;
2823
2824         return 0;
2825 }
2826
2827 static int ieee80211_sta_config_auth(struct net_device *dev,
2828                                      struct ieee80211_if_sta *ifsta)
2829 {
2830         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2831         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2832         struct ieee80211_sta_bss *bss, *selected = NULL;
2833         int top_rssi = 0, freq;
2834
2835         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2836             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2837                 ifsta->state = IEEE80211_AUTHENTICATE;
2838                 ieee80211_sta_reset_auth(dev, ifsta);
2839                 return 0;
2840         }
2841
2842         spin_lock_bh(&local->sta_bss_lock);
2843         freq = local->oper_channel->center_freq;
2844         list_for_each_entry(bss, &local->sta_bss_list, list) {
2845                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2846                         continue;
2847
2848                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2849                     !!sdata->default_key)
2850                         continue;
2851
2852                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2853                     bss->freq != freq)
2854                         continue;
2855
2856                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2857                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2858                         continue;
2859
2860                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2861                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2862                         continue;
2863
2864                 if (!selected || top_rssi < bss->rssi) {
2865                         selected = bss;
2866                         top_rssi = bss->rssi;
2867                 }
2868         }
2869         if (selected)
2870                 atomic_inc(&selected->users);
2871         spin_unlock_bh(&local->sta_bss_lock);
2872
2873         if (selected) {
2874                 ieee80211_set_freq(local, selected->freq);
2875                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2876                         ieee80211_sta_set_ssid(dev, selected->ssid,
2877                                                selected->ssid_len);
2878                 ieee80211_sta_set_bssid(dev, selected->bssid);
2879                 ieee80211_rx_bss_put(dev, selected);
2880                 ifsta->state = IEEE80211_AUTHENTICATE;
2881                 ieee80211_sta_reset_auth(dev, ifsta);
2882                 return 0;
2883         } else {
2884                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2885                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2886                                 ieee80211_sta_start_scan(dev, NULL, 0);
2887                         else
2888                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2889                                                          ifsta->ssid_len);
2890                         ifsta->state = IEEE80211_AUTHENTICATE;
2891                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2892                 } else
2893                         ifsta->state = IEEE80211_DISABLED;
2894         }
2895         return -1;
2896 }
2897
2898 static int ieee80211_sta_join_ibss(struct net_device *dev,
2899                                    struct ieee80211_if_sta *ifsta,
2900                                    struct ieee80211_sta_bss *bss)
2901 {
2902         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2903         int res, rates, i, j;
2904         struct sk_buff *skb;
2905         struct ieee80211_mgmt *mgmt;
2906         struct ieee80211_tx_control control;
2907         struct rate_selection ratesel;
2908         u8 *pos;
2909         struct ieee80211_sub_if_data *sdata;
2910         struct ieee80211_supported_band *sband;
2911
2912         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2913
2914         /* Remove possible STA entries from other IBSS networks. */
2915         sta_info_flush(local, NULL);
2916
2917         if (local->ops->reset_tsf) {
2918                 /* Reset own TSF to allow time synchronization work. */
2919                 local->ops->reset_tsf(local_to_hw(local));
2920         }
2921         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2922         res = ieee80211_if_config(dev);
2923         if (res)
2924                 return res;
2925
2926         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2927
2928         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2929         sdata->drop_unencrypted = bss->capability &
2930                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2931
2932         res = ieee80211_set_freq(local, bss->freq);
2933
2934         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2935                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2936                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2937                 return -1;
2938         }
2939
2940         /* Set beacon template based on scan results */
2941         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2942         do {
2943                 if (!skb)
2944                         break;
2945
2946                 skb_reserve(skb, local->hw.extra_tx_headroom);
2947
2948                 mgmt = (struct ieee80211_mgmt *)
2949                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2950                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2951                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2952                                                    IEEE80211_STYPE_BEACON);
2953                 memset(mgmt->da, 0xff, ETH_ALEN);
2954                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2955                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2956                 mgmt->u.beacon.beacon_int =
2957                         cpu_to_le16(local->hw.conf.beacon_int);
2958                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2959
2960                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2961                 *pos++ = WLAN_EID_SSID;
2962                 *pos++ = ifsta->ssid_len;
2963                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2964
2965                 rates = bss->supp_rates_len;
2966                 if (rates > 8)
2967                         rates = 8;
2968                 pos = skb_put(skb, 2 + rates);
2969                 *pos++ = WLAN_EID_SUPP_RATES;
2970                 *pos++ = rates;
2971                 memcpy(pos, bss->supp_rates, rates);
2972
2973                 if (bss->band == IEEE80211_BAND_2GHZ) {
2974                         pos = skb_put(skb, 2 + 1);
2975                         *pos++ = WLAN_EID_DS_PARAMS;
2976                         *pos++ = 1;
2977                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2978                 }
2979
2980                 pos = skb_put(skb, 2 + 2);
2981                 *pos++ = WLAN_EID_IBSS_PARAMS;
2982                 *pos++ = 2;
2983                 /* FIX: set ATIM window based on scan results */
2984                 *pos++ = 0;
2985                 *pos++ = 0;
2986
2987                 if (bss->supp_rates_len > 8) {
2988                         rates = bss->supp_rates_len - 8;
2989                         pos = skb_put(skb, 2 + rates);
2990                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2991                         *pos++ = rates;
2992                         memcpy(pos, &bss->supp_rates[8], rates);
2993                 }
2994
2995                 memset(&control, 0, sizeof(control));
2996                 rate_control_get_rate(dev, sband, skb, &ratesel);
2997                 if (!ratesel.rate) {
2998                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2999                                "for IBSS beacon\n", dev->name);
3000                         break;
3001                 }
3002                 control.vif = &sdata->vif;
3003                 control.tx_rate = ratesel.rate;
3004                 if (sdata->bss_conf.use_short_preamble &&
3005                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
3006                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
3007                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
3008                 control.flags |= IEEE80211_TXCTL_NO_ACK;
3009                 control.retry_limit = 1;
3010
3011                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
3012                 if (ifsta->probe_resp) {
3013                         mgmt = (struct ieee80211_mgmt *)
3014                                 ifsta->probe_resp->data;
3015                         mgmt->frame_control =
3016                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
3017                                              IEEE80211_STYPE_PROBE_RESP);
3018                 } else {
3019                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
3020                                "template for IBSS\n", dev->name);
3021                 }
3022
3023                 if (local->ops->beacon_update &&
3024                     local->ops->beacon_update(local_to_hw(local),
3025                                              skb, &control) == 0) {
3026                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
3027                                "template based on scan results\n", dev->name);
3028                         skb = NULL;
3029                 }
3030
3031                 rates = 0;
3032                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
3033                 for (i = 0; i < bss->supp_rates_len; i++) {
3034                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
3035                         for (j = 0; j < sband->n_bitrates; j++)
3036                                 if (sband->bitrates[j].bitrate == bitrate)
3037                                         rates |= BIT(j);
3038                 }
3039                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
3040         } while (0);
3041
3042         if (skb) {
3043                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3044                        "template\n", dev->name);
3045                 dev_kfree_skb(skb);
3046         }
3047
3048         ifsta->state = IEEE80211_IBSS_JOINED;
3049         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3050
3051         ieee80211_rx_bss_put(dev, bss);
3052
3053         return res;
3054 }
3055
3056
3057 static int ieee80211_sta_create_ibss(struct net_device *dev,
3058                                      struct ieee80211_if_sta *ifsta)
3059 {
3060         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3061         struct ieee80211_sta_bss *bss;
3062         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3063         struct ieee80211_supported_band *sband;
3064         u8 bssid[ETH_ALEN], *pos;
3065         int i;
3066         DECLARE_MAC_BUF(mac);
3067
3068 #if 0
3069         /* Easier testing, use fixed BSSID. */
3070         memset(bssid, 0xfe, ETH_ALEN);
3071 #else
3072         /* Generate random, not broadcast, locally administered BSSID. Mix in
3073          * own MAC address to make sure that devices that do not have proper
3074          * random number generator get different BSSID. */
3075         get_random_bytes(bssid, ETH_ALEN);
3076         for (i = 0; i < ETH_ALEN; i++)
3077                 bssid[i] ^= dev->dev_addr[i];
3078         bssid[0] &= ~0x01;
3079         bssid[0] |= 0x02;
3080 #endif
3081
3082         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3083                dev->name, print_mac(mac, bssid));
3084
3085         bss = ieee80211_rx_bss_add(dev, bssid,
3086                                    local->hw.conf.channel->center_freq,
3087                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3088         if (!bss)
3089                 return -ENOMEM;
3090
3091         bss->band = local->hw.conf.channel->band;
3092         sband = local->hw.wiphy->bands[bss->band];
3093
3094         if (local->hw.conf.beacon_int == 0)
3095                 local->hw.conf.beacon_int = 100;
3096         bss->beacon_int = local->hw.conf.beacon_int;
3097         bss->last_update = jiffies;
3098         bss->capability = WLAN_CAPABILITY_IBSS;
3099         if (sdata->default_key) {
3100                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3101         } else
3102                 sdata->drop_unencrypted = 0;
3103         bss->supp_rates_len = sband->n_bitrates;
3104         pos = bss->supp_rates;
3105         for (i = 0; i < sband->n_bitrates; i++) {
3106                 int rate = sband->bitrates[i].bitrate;
3107                 *pos++ = (u8) (rate / 5);
3108         }
3109
3110         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3111 }
3112
3113
3114 static int ieee80211_sta_find_ibss(struct net_device *dev,
3115                                    struct ieee80211_if_sta *ifsta)
3116 {
3117         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3118         struct ieee80211_sta_bss *bss;
3119         int found = 0;
3120         u8 bssid[ETH_ALEN];
3121         int active_ibss;
3122         DECLARE_MAC_BUF(mac);
3123         DECLARE_MAC_BUF(mac2);
3124
3125         if (ifsta->ssid_len == 0)
3126                 return -EINVAL;
3127
3128         active_ibss = ieee80211_sta_active_ibss(dev);
3129 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3130         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3131                dev->name, active_ibss);
3132 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3133         spin_lock_bh(&local->sta_bss_lock);
3134         list_for_each_entry(bss, &local->sta_bss_list, list) {
3135                 if (ifsta->ssid_len != bss->ssid_len ||
3136                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3137                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3138                         continue;
3139 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3140                 printk(KERN_DEBUG "   bssid=%s found\n",
3141                        print_mac(mac, bss->bssid));
3142 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3143                 memcpy(bssid, bss->bssid, ETH_ALEN);
3144                 found = 1;
3145                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3146                         break;
3147         }
3148         spin_unlock_bh(&local->sta_bss_lock);
3149
3150 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3151         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3152                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3153 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3154         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3155             (bss = ieee80211_rx_bss_get(dev, bssid,
3156                                         local->hw.conf.channel->center_freq,
3157                                         ifsta->ssid, ifsta->ssid_len))) {
3158                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3159                        " based on configured SSID\n",
3160                        dev->name, print_mac(mac, bssid));
3161                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3162         }
3163 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3164         printk(KERN_DEBUG "   did not try to join ibss\n");
3165 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3166
3167         /* Selected IBSS not found in current scan results - try to scan */
3168         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3169             !ieee80211_sta_active_ibss(dev)) {
3170                 mod_timer(&ifsta->timer, jiffies +
3171                                       IEEE80211_IBSS_MERGE_INTERVAL);
3172         } else if (time_after(jiffies, local->last_scan_completed +
3173                               IEEE80211_SCAN_INTERVAL)) {
3174                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3175                        "join\n", dev->name);
3176                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3177                                               ifsta->ssid_len);
3178         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3179                 int interval = IEEE80211_SCAN_INTERVAL;
3180
3181                 if (time_after(jiffies, ifsta->ibss_join_req +
3182                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3183                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3184                             (!(local->oper_channel->flags &
3185                                         IEEE80211_CHAN_NO_IBSS)))
3186                                 return ieee80211_sta_create_ibss(dev, ifsta);
3187                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3188                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3189                                        " %d MHz\n", dev->name,
3190                                        local->hw.conf.channel->center_freq);
3191                         }
3192
3193                         /* No IBSS found - decrease scan interval and continue
3194                          * scanning. */
3195                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3196                 }
3197
3198                 ifsta->state = IEEE80211_IBSS_SEARCH;
3199                 mod_timer(&ifsta->timer, jiffies + interval);
3200                 return 0;
3201         }
3202
3203         return 0;
3204 }
3205
3206
3207 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3208 {
3209         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3210         struct ieee80211_if_sta *ifsta;
3211         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3212
3213         if (len > IEEE80211_MAX_SSID_LEN)
3214                 return -EINVAL;
3215
3216         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3217          * not defined. */
3218         if (local->ops->conf_tx) {
3219                 struct ieee80211_tx_queue_params qparam;
3220                 int i;
3221
3222                 memset(&qparam, 0, sizeof(qparam));
3223
3224                 qparam.aifs = 2;
3225
3226                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3227                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3228                         qparam.cw_min = 31;
3229                 else
3230                         qparam.cw_min = 15;
3231
3232                 qparam.cw_max = 1023;
3233                 qparam.burst_time = 0;
3234
3235                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3236                         local->ops->conf_tx(local_to_hw(local),
3237                                            i + IEEE80211_TX_QUEUE_DATA0,
3238                                            &qparam);
3239
3240                 /* IBSS uses different parameters for Beacon sending */
3241                 qparam.cw_min++;
3242                 qparam.cw_min *= 2;
3243                 qparam.cw_min--;
3244                 local->ops->conf_tx(local_to_hw(local),
3245                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
3246         }
3247
3248         ifsta = &sdata->u.sta;
3249
3250         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3251                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3252         memcpy(ifsta->ssid, ssid, len);
3253         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3254         ifsta->ssid_len = len;
3255
3256         if (len)
3257                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3258         else
3259                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3260         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3261             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3262                 ifsta->ibss_join_req = jiffies;
3263                 ifsta->state = IEEE80211_IBSS_SEARCH;
3264                 return ieee80211_sta_find_ibss(dev, ifsta);
3265         }
3266         return 0;
3267 }
3268
3269
3270 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3271 {
3272         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3273         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3274         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3275         *len = ifsta->ssid_len;
3276         return 0;
3277 }
3278
3279
3280 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3281 {
3282         struct ieee80211_sub_if_data *sdata;
3283         struct ieee80211_if_sta *ifsta;
3284         int res;
3285
3286         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3287         ifsta = &sdata->u.sta;
3288
3289         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3290                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3291                 res = ieee80211_if_config(dev);
3292                 if (res) {
3293                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3294                                "the low-level driver\n", dev->name);
3295                         return res;
3296                 }
3297         }
3298
3299         if (is_valid_ether_addr(bssid))
3300                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3301         else
3302                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3303
3304         return 0;
3305 }
3306
3307
3308 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3309                                     struct ieee80211_sub_if_data *sdata,
3310                                     int powersave)
3311 {
3312         struct sk_buff *skb;
3313         struct ieee80211_hdr *nullfunc;
3314         u16 fc;
3315
3316         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3317         if (!skb) {
3318                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3319                        "frame\n", sdata->dev->name);
3320                 return;
3321         }
3322         skb_reserve(skb, local->hw.extra_tx_headroom);
3323
3324         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3325         memset(nullfunc, 0, 24);
3326         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3327              IEEE80211_FCTL_TODS;
3328         if (powersave)
3329                 fc |= IEEE80211_FCTL_PM;
3330         nullfunc->frame_control = cpu_to_le16(fc);
3331         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3332         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3333         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3334
3335         ieee80211_sta_tx(sdata->dev, skb, 0);
3336 }
3337
3338
3339 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3340 {
3341         struct ieee80211_local *local = hw_to_local(hw);
3342         struct net_device *dev = local->scan_dev;
3343         struct ieee80211_sub_if_data *sdata;
3344         union iwreq_data wrqu;
3345
3346         local->last_scan_completed = jiffies;
3347         memset(&wrqu, 0, sizeof(wrqu));
3348         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3349
3350         if (local->sta_hw_scanning) {
3351                 local->sta_hw_scanning = 0;
3352                 goto done;
3353         }
3354
3355         local->sta_sw_scanning = 0;
3356         if (ieee80211_hw_config(local))
3357                 printk(KERN_DEBUG "%s: failed to restore operational "
3358                        "channel after scan\n", dev->name);
3359
3360
3361         netif_tx_lock_bh(local->mdev);
3362         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3363         local->ops->configure_filter(local_to_hw(local),
3364                                      FIF_BCN_PRBRESP_PROMISC,
3365                                      &local->filter_flags,
3366                                      local->mdev->mc_count,
3367                                      local->mdev->mc_list);
3368
3369         netif_tx_unlock_bh(local->mdev);
3370
3371         rcu_read_lock();
3372         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3373
3374                 /* No need to wake the master device. */
3375                 if (sdata->dev == local->mdev)
3376                         continue;
3377
3378                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3379                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3380                                 ieee80211_send_nullfunc(local, sdata, 0);
3381                         ieee80211_sta_timer((unsigned long)sdata);
3382                 }
3383
3384                 netif_wake_queue(sdata->dev);
3385         }
3386         rcu_read_unlock();
3387
3388 done:
3389         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3390         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3391                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3392                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3393                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3394                     !ieee80211_sta_active_ibss(dev)))
3395                         ieee80211_sta_find_ibss(dev, ifsta);
3396         }
3397 }
3398 EXPORT_SYMBOL(ieee80211_scan_completed);
3399
3400 void ieee80211_sta_scan_work(struct work_struct *work)
3401 {
3402         struct ieee80211_local *local =
3403                 container_of(work, struct ieee80211_local, scan_work.work);
3404         struct net_device *dev = local->scan_dev;
3405         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3406         struct ieee80211_supported_band *sband;
3407         struct ieee80211_channel *chan;
3408         int skip;
3409         unsigned long next_delay = 0;
3410
3411         if (!local->sta_sw_scanning)
3412                 return;
3413
3414         switch (local->scan_state) {
3415         case SCAN_SET_CHANNEL:
3416                 /*
3417                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3418                  * after we successfully scanned the last channel of the last
3419                  * band (and the last band is supported by the hw)
3420                  */
3421                 if (local->scan_band < IEEE80211_NUM_BANDS)
3422                         sband = local->hw.wiphy->bands[local->scan_band];
3423                 else
3424                         sband = NULL;
3425
3426                 /*
3427                  * If we are at an unsupported band and have more bands
3428                  * left to scan, advance to the next supported one.
3429                  */
3430                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3431                         local->scan_band++;
3432                         sband = local->hw.wiphy->bands[local->scan_band];
3433                         local->scan_channel_idx = 0;
3434                 }
3435
3436                 /* if no more bands/channels left, complete scan */
3437                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3438                         ieee80211_scan_completed(local_to_hw(local));
3439                         return;
3440                 }
3441                 skip = 0;
3442                 chan = &sband->channels[local->scan_channel_idx];
3443
3444                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3445                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3446                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3447                         skip = 1;
3448
3449                 if (!skip) {
3450                         local->scan_channel = chan;
3451                         if (ieee80211_hw_config(local)) {
3452                                 printk(KERN_DEBUG "%s: failed to set freq to "
3453                                        "%d MHz for scan\n", dev->name,
3454                                        chan->center_freq);
3455                                 skip = 1;
3456                         }
3457                 }
3458
3459                 /* advance state machine to next channel/band */
3460                 local->scan_channel_idx++;
3461                 if (local->scan_channel_idx >= sband->n_channels) {
3462                         /*
3463                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3464                          * we'll catch that case above and complete the scan
3465                          * if that is the case.
3466                          */
3467                         local->scan_band++;
3468                         local->scan_channel_idx = 0;
3469                 }
3470
3471                 if (skip)
3472                         break;
3473
3474                 next_delay = IEEE80211_PROBE_DELAY +
3475                              usecs_to_jiffies(local->hw.channel_change_time);
3476                 local->scan_state = SCAN_SEND_PROBE;
3477                 break;
3478         case SCAN_SEND_PROBE:
3479                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3480                 local->scan_state = SCAN_SET_CHANNEL;
3481
3482                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3483                         break;
3484                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3485                                          local->scan_ssid_len);
3486                 next_delay = IEEE80211_CHANNEL_TIME;
3487                 break;
3488         }
3489
3490         if (local->sta_sw_scanning)
3491                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3492                                    next_delay);
3493 }
3494
3495
3496 static int ieee80211_sta_start_scan(struct net_device *dev,
3497                                     u8 *ssid, size_t ssid_len)
3498 {
3499         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3500         struct ieee80211_sub_if_data *sdata;
3501
3502         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3503                 return -EINVAL;
3504
3505         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3506          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3507          * BSSID: MACAddress
3508          * SSID
3509          * ScanType: ACTIVE, PASSIVE
3510          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3511          *    a Probe frame during active scanning
3512          * ChannelList
3513          * MinChannelTime (>= ProbeDelay), in TU
3514          * MaxChannelTime: (>= MinChannelTime), in TU
3515          */
3516
3517          /* MLME-SCAN.confirm
3518           * BSSDescriptionSet
3519           * ResultCode: SUCCESS, INVALID_PARAMETERS
3520          */
3521
3522         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3523                 if (local->scan_dev == dev)
3524                         return 0;
3525                 return -EBUSY;
3526         }
3527
3528         if (local->ops->hw_scan) {
3529                 int rc = local->ops->hw_scan(local_to_hw(local),
3530                                              ssid, ssid_len);
3531                 if (!rc) {
3532                         local->sta_hw_scanning = 1;
3533                         local->scan_dev = dev;
3534                 }
3535                 return rc;
3536         }
3537
3538         local->sta_sw_scanning = 1;
3539
3540         rcu_read_lock();
3541         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3542
3543                 /* Don't stop the master interface, otherwise we can't transmit
3544                  * probes! */
3545                 if (sdata->dev == local->mdev)
3546                         continue;
3547
3548                 netif_stop_queue(sdata->dev);
3549                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3550                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3551                         ieee80211_send_nullfunc(local, sdata, 1);
3552         }
3553         rcu_read_unlock();
3554
3555         if (ssid) {
3556                 local->scan_ssid_len = ssid_len;
3557                 memcpy(local->scan_ssid, ssid, ssid_len);
3558         } else
3559                 local->scan_ssid_len = 0;
3560         local->scan_state = SCAN_SET_CHANNEL;
3561         local->scan_channel_idx = 0;
3562         local->scan_band = IEEE80211_BAND_2GHZ;
3563         local->scan_dev = dev;
3564
3565         netif_tx_lock_bh(local->mdev);
3566         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3567         local->ops->configure_filter(local_to_hw(local),
3568                                      FIF_BCN_PRBRESP_PROMISC,
3569                                      &local->filter_flags,
3570                                      local->mdev->mc_count,
3571                                      local->mdev->mc_list);
3572         netif_tx_unlock_bh(local->mdev);
3573
3574         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3575         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3576                            IEEE80211_CHANNEL_TIME);
3577
3578         return 0;
3579 }
3580
3581
3582 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3583 {
3584         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3585         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3586         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3587
3588         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3589                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3590
3591         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3592                 if (local->scan_dev == dev)
3593                         return 0;
3594                 return -EBUSY;
3595         }
3596
3597         ifsta->scan_ssid_len = ssid_len;
3598         if (ssid_len)
3599                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3600         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3601         queue_work(local->hw.workqueue, &ifsta->work);
3602         return 0;
3603 }
3604
3605 static char *
3606 ieee80211_sta_scan_result(struct net_device *dev,
3607                           struct ieee80211_sta_bss *bss,
3608                           char *current_ev, char *end_buf)
3609 {
3610         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3611         struct iw_event iwe;
3612
3613         if (time_after(jiffies,
3614                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3615                 return current_ev;
3616
3617         memset(&iwe, 0, sizeof(iwe));
3618         iwe.cmd = SIOCGIWAP;
3619         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3620         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3621         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3622                                           IW_EV_ADDR_LEN);
3623
3624         memset(&iwe, 0, sizeof(iwe));
3625         iwe.cmd = SIOCGIWESSID;
3626         iwe.u.data.length = bss->ssid_len;
3627         iwe.u.data.flags = 1;
3628         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3629                                           bss->ssid);
3630
3631         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3632                 memset(&iwe, 0, sizeof(iwe));
3633                 iwe.cmd = SIOCGIWMODE;
3634                 if (bss->capability & WLAN_CAPABILITY_ESS)
3635                         iwe.u.mode = IW_MODE_MASTER;
3636                 else
3637                         iwe.u.mode = IW_MODE_ADHOC;
3638                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3639                                                   IW_EV_UINT_LEN);
3640         }
3641
3642         memset(&iwe, 0, sizeof(iwe));
3643         iwe.cmd = SIOCGIWFREQ;
3644         iwe.u.freq.m = bss->freq;
3645         iwe.u.freq.e = 6;
3646         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3647                                           IW_EV_FREQ_LEN);
3648
3649         memset(&iwe, 0, sizeof(iwe));
3650         iwe.cmd = SIOCGIWFREQ;
3651         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3652         iwe.u.freq.e = 0;
3653         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3654                                           IW_EV_FREQ_LEN);
3655
3656         memset(&iwe, 0, sizeof(iwe));
3657         iwe.cmd = IWEVQUAL;
3658         iwe.u.qual.qual = bss->signal;
3659         iwe.u.qual.level = bss->rssi;
3660         iwe.u.qual.noise = bss->noise;
3661         iwe.u.qual.updated = local->wstats_flags;
3662         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3663                                           IW_EV_QUAL_LEN);
3664
3665         memset(&iwe, 0, sizeof(iwe));
3666         iwe.cmd = SIOCGIWENCODE;
3667         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3668                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3669         else
3670                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3671         iwe.u.data.length = 0;
3672         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3673
3674         if (bss && bss->wpa_ie) {
3675                 memset(&iwe, 0, sizeof(iwe));
3676                 iwe.cmd = IWEVGENIE;
3677                 iwe.u.data.length = bss->wpa_ie_len;
3678                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3679                                                   bss->wpa_ie);
3680         }
3681
3682         if (bss && bss->rsn_ie) {
3683                 memset(&iwe, 0, sizeof(iwe));
3684                 iwe.cmd = IWEVGENIE;
3685                 iwe.u.data.length = bss->rsn_ie_len;
3686                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3687                                                   bss->rsn_ie);
3688         }
3689
3690         if (bss && bss->supp_rates_len > 0) {
3691                 /* display all supported rates in readable format */
3692                 char *p = current_ev + IW_EV_LCP_LEN;
3693                 int i;
3694
3695                 memset(&iwe, 0, sizeof(iwe));
3696                 iwe.cmd = SIOCGIWRATE;
3697                 /* Those two flags are ignored... */
3698                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3699
3700                 for (i = 0; i < bss->supp_rates_len; i++) {
3701                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3702                                                         0x7f) * 500000);
3703                         p = iwe_stream_add_value(current_ev, p,
3704                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3705                 }
3706                 current_ev = p;
3707         }
3708
3709         if (bss) {
3710                 char *buf;
3711                 buf = kmalloc(30, GFP_ATOMIC);
3712                 if (buf) {
3713                         memset(&iwe, 0, sizeof(iwe));
3714                         iwe.cmd = IWEVCUSTOM;
3715                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3716                         iwe.u.data.length = strlen(buf);
3717                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3718                                                           &iwe, buf);
3719                         kfree(buf);
3720                 }
3721         }
3722
3723         return current_ev;
3724 }
3725
3726
3727 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3728 {
3729         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3730         char *current_ev = buf;
3731         char *end_buf = buf + len;
3732         struct ieee80211_sta_bss *bss;
3733
3734         spin_lock_bh(&local->sta_bss_lock);
3735         list_for_each_entry(bss, &local->sta_bss_list, list) {
3736                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3737                         spin_unlock_bh(&local->sta_bss_lock);
3738                         return -E2BIG;
3739                 }
3740                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3741                                                        end_buf);
3742         }
3743         spin_unlock_bh(&local->sta_bss_lock);
3744         return current_ev - buf;
3745 }
3746
3747
3748 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3749 {
3750         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3751         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3752         kfree(ifsta->extra_ie);
3753         if (len == 0) {
3754                 ifsta->extra_ie = NULL;
3755                 ifsta->extra_ie_len = 0;
3756                 return 0;
3757         }
3758         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3759         if (!ifsta->extra_ie) {
3760                 ifsta->extra_ie_len = 0;
3761                 return -ENOMEM;
3762         }
3763         memcpy(ifsta->extra_ie, ie, len);
3764         ifsta->extra_ie_len = len;
3765         return 0;
3766 }
3767
3768
3769 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3770                                          struct sk_buff *skb, u8 *bssid,
3771                                          u8 *addr)
3772 {
3773         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3774         struct sta_info *sta;
3775         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3776         DECLARE_MAC_BUF(mac);
3777
3778         /* TODO: Could consider removing the least recently used entry and
3779          * allow new one to be added. */
3780         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3781                 if (net_ratelimit()) {
3782                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3783                                "entry %s\n", dev->name, print_mac(mac, addr));
3784                 }
3785                 return NULL;
3786         }
3787
3788         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3789                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3790
3791         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3792         if (!sta)
3793                 return NULL;
3794
3795         sta->flags |= WLAN_STA_AUTHORIZED;
3796
3797         sta->supp_rates[local->hw.conf.channel->band] =
3798                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
3799
3800         rate_control_rate_init(sta, local);
3801
3802         return sta; /* caller will call sta_info_put() */
3803 }
3804
3805
3806 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3807 {
3808         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3809         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3810
3811         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3812                dev->name, reason);
3813
3814         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3815             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3816                 return -EINVAL;
3817
3818         ieee80211_send_deauth(dev, ifsta, reason);
3819         ieee80211_set_disassoc(dev, ifsta, 1);
3820         return 0;
3821 }
3822
3823
3824 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3825 {
3826         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3827         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3828
3829         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3830                dev->name, reason);
3831
3832         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3833                 return -EINVAL;
3834
3835         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3836                 return -1;
3837
3838         ieee80211_send_disassoc(dev, ifsta, reason);
3839         ieee80211_set_disassoc(dev, ifsta, 0);
3840         return 0;
3841 }