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                 params.txop = pos[2] | (pos[3] << 8);
 301 #ifdef CONFIG_MAC80211_DEBUG
 302                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 303                        "cWmin=%d cWmax=%d txop=%d\n",
 304                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 305                        params.cw_max, params.txop);
 306 #endif
 307                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 308                  * AC for now) */
 309                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 310                         printk(KERN_DEBUG "%s: failed to set TX queue "
 311                                "parameters for queue %d\n", dev->name, queue);
 312                 }
 313         }
 314 }
 315
 316
 317 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 318                                    u8 erp_value)
 319 {
 320         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 321         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 322         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 323         bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 324         DECLARE_MAC_BUF(mac);
 325         u32 changed = 0;
 326
 327         if (use_protection != bss_conf->use_cts_prot) {
 328                 if (net_ratelimit()) {
 329                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 330                                "%s)\n",
 331                                sdata->dev->name,
 332                                use_protection ? "enabled" : "disabled",
 333                                print_mac(mac, ifsta->bssid));
 334                 }
 335                 bss_conf->use_cts_prot = use_protection;
 336                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 337         }
 338
 339         if (preamble_mode != bss_conf->use_short_preamble) {
 340                 if (net_ratelimit()) {
 341                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 342                                " (BSSID=%s)\n",
 343                                sdata->dev->name,
 344                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 345                                         "short" : "long",
 346                                print_mac(mac, ifsta->bssid));
 347                 }
 348                 bss_conf->use_short_preamble = preamble_mode;
 349                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 350         }
 351
 352         return changed;
 353 }
 354
 355 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 356                                    struct ieee80211_ht_info *ht_info)
 357 {
 358
 359         if (ht_info == NULL)
 360                 return -EINVAL;
 361
 362         memset(ht_info, 0, sizeof(*ht_info));
 363
 364         if (ht_cap_ie) {
 365                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 366
 367                 ht_info->ht_supported = 1;
 368                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 369                 ht_info->ampdu_factor =
 370                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 371                 ht_info->ampdu_density =
 372                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 373                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 374         } else
 375                 ht_info->ht_supported = 0;
 376
 377         return 0;
 378 }
 379
 380 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 381                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 382                         struct ieee80211_ht_bss_info *bss_info)
 383 {
 384         if (bss_info == NULL)
 385                 return -EINVAL;
 386
 387         memset(bss_info, 0, sizeof(*bss_info));
 388
 389         if (ht_add_info_ie) {
 390                 u16 op_mode;
 391                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 392
 393                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 394                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 395                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 396         }
 397
 398         return 0;
 399 }
 400
 401 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 402                                          struct ieee80211_if_sta *ifsta)
 403 {
 404         char *buf;
 405         size_t len;
 406         int i;
 407         union iwreq_data wrqu;
 408
 409         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 410                 return;
 411
 412         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 413                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 414         if (!buf)
 415                 return;
 416
 417         len = sprintf(buf, "ASSOCINFO(");
 418         if (ifsta->assocreq_ies) {
 419                 len += sprintf(buf + len, "ReqIEs=");
 420                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 421                         len += sprintf(buf + len, "%02x",
 422                                        ifsta->assocreq_ies[i]);
 423                 }
 424         }
 425         if (ifsta->assocresp_ies) {
 426                 if (ifsta->assocreq_ies)
 427                         len += sprintf(buf + len, " ");
 428                 len += sprintf(buf + len, "RespIEs=");
 429                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 430                         len += sprintf(buf + len, "%02x",
 431                                        ifsta->assocresp_ies[i]);
 432                 }
 433         }
 434         len += sprintf(buf + len, ")");
 435
 436         if (len > IW_CUSTOM_MAX) {
 437                 len = sprintf(buf, "ASSOCRESPIE=");
 438                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 439                         len += sprintf(buf + len, "%02x",
 440                                        ifsta->assocresp_ies[i]);
 441                 }
 442         }
 443
 444         memset(&wrqu, 0, sizeof(wrqu));
 445         wrqu.data.length = len;
 446         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 447
 448         kfree(buf);
 449 }
 450
 451
 452 static void ieee80211_set_associated(struct net_device *dev,
 453                                      struct ieee80211_if_sta *ifsta,
 454                                      bool assoc)
 455 {
 456         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 457         struct ieee80211_local *local = sdata->local;
 458         union iwreq_data wrqu;
 459         u32 changed = BSS_CHANGED_ASSOC;
 460
 461         if (assoc) {
 462                 struct ieee80211_sta_bss *bss;
 463
 464                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 465
 466                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 467                         return;
 468
 469                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 470                                            local->hw.conf.channel->center_freq,
 471                                            ifsta->ssid, ifsta->ssid_len);
 472                 if (bss) {
 473                         if (bss->has_erp_value)
 474                                 changed |= ieee80211_handle_erp_ie(
 475                                                 sdata, bss->erp_value);
 476                         ieee80211_rx_bss_put(dev, bss);
 477                 }
 478
 479                 netif_carrier_on(dev);
 480                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 481                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 482                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 483                 ieee80211_sta_send_associnfo(dev, ifsta);
 484         } else {
 485                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 486
 487                 netif_carrier_off(dev);
 488                 ieee80211_reset_erp_info(dev);
 489                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 490         }
 491         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 492         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 493         ifsta->last_probe = jiffies;
 494         ieee80211_led_assoc(local, assoc);
 495
 496         sdata->bss_conf.assoc = assoc;
 497         ieee80211_bss_info_change_notify(sdata, changed);
 498 }
 499
 500 static void ieee80211_set_disassoc(struct net_device *dev,
 501                                    struct ieee80211_if_sta *ifsta, int deauth)
 502 {
 503         if (deauth)
 504                 ifsta->auth_tries = 0;
 505         ifsta->assoc_tries = 0;
 506         ieee80211_set_associated(dev, ifsta, 0);
 507 }
 508
 509 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 510                              int encrypt)
 511 {
 512         struct ieee80211_sub_if_data *sdata;
 513         struct ieee80211_tx_packet_data *pkt_data;
 514
 515         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 516         skb->dev = sdata->local->mdev;
 517         skb_set_mac_header(skb, 0);
 518         skb_set_network_header(skb, 0);
 519         skb_set_transport_header(skb, 0);
 520
 521         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 522         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 523         pkt_data->ifindex = sdata->dev->ifindex;
 524         if (!encrypt)
 525                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 526
 527         dev_queue_xmit(skb);
 528 }
 529
 530
 531 static void ieee80211_send_auth(struct net_device *dev,
 532                                 struct ieee80211_if_sta *ifsta,
 533                                 int transaction, u8 *extra, size_t extra_len,
 534                                 int encrypt)
 535 {
 536         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 537         struct sk_buff *skb;
 538         struct ieee80211_mgmt *mgmt;
 539
 540         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 541                             sizeof(*mgmt) + 6 + extra_len);
 542         if (!skb) {
 543                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 544                        "frame\n", dev->name);
 545                 return;
 546         }
 547         skb_reserve(skb, local->hw.extra_tx_headroom);
 548
 549         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 550         memset(mgmt, 0, 24 + 6);
 551         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 552                                            IEEE80211_STYPE_AUTH);
 553         if (encrypt)
 554                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 555         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 556         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 557         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 558         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 559         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 560         ifsta->auth_transaction = transaction + 1;
 561         mgmt->u.auth.status_code = cpu_to_le16(0);
 562         if (extra)
 563                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 564
 565         ieee80211_sta_tx(dev, skb, encrypt);
 566 }
 567
 568
 569 static void ieee80211_authenticate(struct net_device *dev,
 570                                    struct ieee80211_if_sta *ifsta)
 571 {
 572         DECLARE_MAC_BUF(mac);
 573
 574         ifsta->auth_tries++;
 575         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 576                 printk(KERN_DEBUG "%s: authentication with AP %s"
 577                        " timed out\n",
 578                        dev->name, print_mac(mac, ifsta->bssid));
 579                 ifsta->state = IEEE80211_DISABLED;
 580                 return;
 581         }
 582
 583         ifsta->state = IEEE80211_AUTHENTICATE;
 584         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 585                dev->name, print_mac(mac, ifsta->bssid));
 586
 587         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 588
 589         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 590 }
 591
 592
 593 static void ieee80211_send_assoc(struct net_device *dev,
 594                                  struct ieee80211_if_sta *ifsta)
 595 {
 596         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 597         struct sk_buff *skb;
 598         struct ieee80211_mgmt *mgmt;
 599         u8 *pos, *ies;
 600         int i, len;
 601         u16 capab;
 602         struct ieee80211_sta_bss *bss;
 603         int wmm = 0;
 604         struct ieee80211_supported_band *sband;
 605
 606         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 607                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 608                             ifsta->ssid_len);
 609         if (!skb) {
 610                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 611                        "frame\n", dev->name);
 612                 return;
 613         }
 614         skb_reserve(skb, local->hw.extra_tx_headroom);
 615
 616         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 617
 618         capab = ifsta->capab;
 619
 620         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 621                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 622                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 623                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 624                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 625         }
 626
 627         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 628                                    local->hw.conf.channel->center_freq,
 629                                    ifsta->ssid, ifsta->ssid_len);
 630         if (bss) {
 631                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 632                         capab |= WLAN_CAPABILITY_PRIVACY;
 633                 if (bss->wmm_ie) {
 634                         wmm = 1;
 635                 }
 636                 ieee80211_rx_bss_put(dev, bss);
 637         }
 638
 639         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 640         memset(mgmt, 0, 24);
 641         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 642         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 643         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 644
 645         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 646                 skb_put(skb, 10);
 647                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 648                                                    IEEE80211_STYPE_REASSOC_REQ);
 649                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 650                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 651                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 652                        ETH_ALEN);
 653         } else {
 654                 skb_put(skb, 4);
 655                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 656                                                    IEEE80211_STYPE_ASSOC_REQ);
 657                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 658                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 659         }
 660
 661         /* SSID */
 662         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 663         *pos++ = WLAN_EID_SSID;
 664         *pos++ = ifsta->ssid_len;
 665         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 666
 667         len = sband->n_bitrates;
 668         if (len > 8)
 669                 len = 8;
 670         pos = skb_put(skb, len + 2);
 671         *pos++ = WLAN_EID_SUPP_RATES;
 672         *pos++ = len;
 673         for (i = 0; i < len; i++) {
 674                 int rate = sband->bitrates[i].bitrate;
 675                 *pos++ = (u8) (rate / 5);
 676         }
 677
 678         if (sband->n_bitrates > len) {
 679                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 680                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 681                 *pos++ = sband->n_bitrates - len;
 682                 for (i = len; i < sband->n_bitrates; i++) {
 683                         int rate = sband->bitrates[i].bitrate;
 684                         *pos++ = (u8) (rate / 5);
 685                 }
 686         }
 687
 688         if (ifsta->extra_ie) {
 689                 pos = skb_put(skb, ifsta->extra_ie_len);
 690                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 691         }
 692
 693         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 694                 pos = skb_put(skb, 9);
 695                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 696                 *pos++ = 7; /* len */
 697                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 698                 *pos++ = 0x50;
 699                 *pos++ = 0xf2;
 700                 *pos++ = 2; /* WME */
 701                 *pos++ = 0; /* WME info */
 702                 *pos++ = 1; /* WME ver */
 703                 *pos++ = 0;
 704         }
 705         /* wmm support is a must to HT */
 706         if (wmm && sband->ht_info.ht_supported) {
 707                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 708                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 709                 *pos++ = WLAN_EID_HT_CAPABILITY;
 710                 *pos++ = sizeof(struct ieee80211_ht_cap);
 711                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 712                 memcpy(pos, &tmp, sizeof(u16));
 713                 pos += sizeof(u16);
 714                 /* TODO: needs a define here for << 2 */
 715                 *pos++ = sband->ht_info.ampdu_factor |
 716                          (sband->ht_info.ampdu_density << 2);
 717                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 718         }
 719
 720         kfree(ifsta->assocreq_ies);
 721         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 722         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 723         if (ifsta->assocreq_ies)
 724                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 725
 726         ieee80211_sta_tx(dev, skb, 0);
 727 }
 728
 729
 730 static void ieee80211_send_deauth(struct net_device *dev,
 731                                   struct ieee80211_if_sta *ifsta, u16 reason)
 732 {
 733         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 734         struct sk_buff *skb;
 735         struct ieee80211_mgmt *mgmt;
 736
 737         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 738         if (!skb) {
 739                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 740                        "frame\n", dev->name);
 741                 return;
 742         }
 743         skb_reserve(skb, local->hw.extra_tx_headroom);
 744
 745         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 746         memset(mgmt, 0, 24);
 747         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 748         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 749         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 750         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 751                                            IEEE80211_STYPE_DEAUTH);
 752         skb_put(skb, 2);
 753         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 754
 755         ieee80211_sta_tx(dev, skb, 0);
 756 }
 757
 758
 759 static void ieee80211_send_disassoc(struct net_device *dev,
 760                                     struct ieee80211_if_sta *ifsta, u16 reason)
 761 {
 762         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 763         struct sk_buff *skb;
 764         struct ieee80211_mgmt *mgmt;
 765
 766         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 767         if (!skb) {
 768                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 769                        "frame\n", dev->name);
 770                 return;
 771         }
 772         skb_reserve(skb, local->hw.extra_tx_headroom);
 773
 774         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 775         memset(mgmt, 0, 24);
 776         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 777         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 778         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 779         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 780                                            IEEE80211_STYPE_DISASSOC);
 781         skb_put(skb, 2);
 782         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 783
 784         ieee80211_sta_tx(dev, skb, 0);
 785 }
 786
 787
 788 static int ieee80211_privacy_mismatch(struct net_device *dev,
 789                                       struct ieee80211_if_sta *ifsta)
 790 {
 791         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 792         struct ieee80211_sta_bss *bss;
 793         int bss_privacy;
 794         int wep_privacy;
 795         int privacy_invoked;
 796
 797         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 798                 return 0;
 799
 800         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 801                                    local->hw.conf.channel->center_freq,
 802                                    ifsta->ssid, ifsta->ssid_len);
 803         if (!bss)
 804                 return 0;
 805
 806         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 807         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 808         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 809
 810         ieee80211_rx_bss_put(dev, bss);
 811
 812         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 813                 return 0;
 814
 815         return 1;
 816 }
 817
 818
 819 static void ieee80211_associate(struct net_device *dev,
 820                                 struct ieee80211_if_sta *ifsta)
 821 {
 822         DECLARE_MAC_BUF(mac);
 823
 824         ifsta->assoc_tries++;
 825         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 826                 printk(KERN_DEBUG "%s: association with AP %s"
 827                        " timed out\n",
 828                        dev->name, print_mac(mac, ifsta->bssid));
 829                 ifsta->state = IEEE80211_DISABLED;
 830                 return;
 831         }
 832
 833         ifsta->state = IEEE80211_ASSOCIATE;
 834         printk(KERN_DEBUG "%s: associate with AP %s\n",
 835                dev->name, print_mac(mac, ifsta->bssid));
 836         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 837                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 838                        "mixed-cell disabled - abort association\n", dev->name);
 839                 ifsta->state = IEEE80211_DISABLED;
 840                 return;
 841         }
 842
 843         ieee80211_send_assoc(dev, ifsta);
 844
 845         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 846 }
 847
 848
 849 static void ieee80211_associated(struct net_device *dev,
 850                                  struct ieee80211_if_sta *ifsta)
 851 {
 852         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 853         struct sta_info *sta;
 854         int disassoc;
 855         DECLARE_MAC_BUF(mac);
 856
 857         /* TODO: start monitoring current AP signal quality and number of
 858          * missed beacons. Scan other channels every now and then and search
 859          * for better APs. */
 860         /* TODO: remove expired BSSes */
 861
 862         ifsta->state = IEEE80211_ASSOCIATED;
 863
 864         sta = sta_info_get(local, ifsta->bssid);
 865         if (!sta) {
 866                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 867                        dev->name, print_mac(mac, ifsta->bssid));
 868                 disassoc = 1;
 869         } else {
 870                 disassoc = 0;
 871                 if (time_after(jiffies,
 872                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 873                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 874                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 875                                        "current AP %s - assume out of "
 876                                        "range\n",
 877                                        dev->name, print_mac(mac, ifsta->bssid));
 878                                 disassoc = 1;
 879                                 sta_info_free(sta);
 880                         } else
 881                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 882                                                          local->scan_ssid,
 883                                                          local->scan_ssid_len);
 884                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 885                 } else {
 886                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 887                         if (time_after(jiffies, ifsta->last_probe +
 888                                        IEEE80211_PROBE_INTERVAL)) {
 889                                 ifsta->last_probe = jiffies;
 890                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 891                                                          ifsta->ssid,
 892                                                          ifsta->ssid_len);
 893                         }
 894                 }
 895                 sta_info_put(sta);
 896         }
 897         if (disassoc) {
 898                 ifsta->state = IEEE80211_DISABLED;
 899                 ieee80211_set_associated(dev, ifsta, 0);
 900         } else {
 901                 mod_timer(&ifsta->timer, jiffies +
 902                                       IEEE80211_MONITORING_INTERVAL);
 903         }
 904 }
 905
 906
 907 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 908                                      u8 *ssid, size_t ssid_len)
 909 {
 910         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 911         struct ieee80211_supported_band *sband;
 912         struct sk_buff *skb;
 913         struct ieee80211_mgmt *mgmt;
 914         u8 *pos, *supp_rates, *esupp_rates = NULL;
 915         int i;
 916
 917         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 918         if (!skb) {
 919                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 920                        "request\n", dev->name);
 921                 return;
 922         }
 923         skb_reserve(skb, local->hw.extra_tx_headroom);
 924
 925         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 926         memset(mgmt, 0, 24);
 927         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 928                                            IEEE80211_STYPE_PROBE_REQ);
 929         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 930         if (dst) {
 931                 memcpy(mgmt->da, dst, ETH_ALEN);
 932                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 933         } else {
 934                 memset(mgmt->da, 0xff, ETH_ALEN);
 935                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 936         }
 937         pos = skb_put(skb, 2 + ssid_len);
 938         *pos++ = WLAN_EID_SSID;
 939         *pos++ = ssid_len;
 940         memcpy(pos, ssid, ssid_len);
 941
 942         supp_rates = skb_put(skb, 2);
 943         supp_rates[0] = WLAN_EID_SUPP_RATES;
 944         supp_rates[1] = 0;
 945         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 946
 947         for (i = 0; i < sband->n_bitrates; i++) {
 948                 struct ieee80211_rate *rate = &sband->bitrates[i];
 949                 if (esupp_rates) {
 950                         pos = skb_put(skb, 1);
 951                         esupp_rates[1]++;
 952                 } else if (supp_rates[1] == 8) {
 953                         esupp_rates = skb_put(skb, 3);
 954                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 955                         esupp_rates[1] = 1;
 956                         pos = &esupp_rates[2];
 957                 } else {
 958                         pos = skb_put(skb, 1);
 959                         supp_rates[1]++;
 960                 }
 961                 *pos = rate->bitrate / 5;
 962         }
 963
 964         ieee80211_sta_tx(dev, skb, 0);
 965 }
 966
 967
 968 static int ieee80211_sta_wep_configured(struct net_device *dev)
 969 {
 970         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 971         if (!sdata || !sdata->default_key ||
 972             sdata->default_key->conf.alg != ALG_WEP)
 973                 return 0;
 974         return 1;
 975 }
 976
 977
 978 static void ieee80211_auth_completed(struct net_device *dev,
 979                                      struct ieee80211_if_sta *ifsta)
 980 {
 981         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 982         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 983         ieee80211_associate(dev, ifsta);
 984 }
 985
 986
 987 static void ieee80211_auth_challenge(struct net_device *dev,
 988                                      struct ieee80211_if_sta *ifsta,
 989                                      struct ieee80211_mgmt *mgmt,
 990                                      size_t len)
 991 {
 992         u8 *pos;
 993         struct ieee802_11_elems elems;
 994
 995         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 996         pos = mgmt->u.auth.variable;
 997         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 998         if (!elems.challenge) {
 999                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1000                        "frame\n", dev->name);
1001                 return;
1002         }
1003         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1004                             elems.challenge_len + 2, 1);
1005 }
1006
1007 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1008                                         u8 dialog_token, u16 status, u16 policy,
1009                                         u16 buf_size, u16 timeout)
1010 {
1011         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1012         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1013         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1014         struct sk_buff *skb;
1015         struct ieee80211_mgmt *mgmt;
1016         u16 capab;
1017
1018         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1019                                         sizeof(mgmt->u.action.u.addba_resp));
1020         if (!skb) {
1021                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1022                        "for addba resp frame\n", dev->name);
1023                 return;
1024         }
1025
1026         skb_reserve(skb, local->hw.extra_tx_headroom);
1027         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1028         memset(mgmt, 0, 24);
1029         memcpy(mgmt->da, da, ETH_ALEN);
1030         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1031         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1032                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1033         else
1034                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1035         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1036                                            IEEE80211_STYPE_ACTION);
1037
1038         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1039         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1040         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1041         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1042
1043         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1044         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1045         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1046
1047         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1048         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1049         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1050
1051         ieee80211_sta_tx(dev, skb, 0);
1052
1053         return;
1054 }
1055
1056 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1057                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1058                                 u16 agg_size, u16 timeout)
1059 {
1060         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1061         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1062         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1063         struct sk_buff *skb;
1064         struct ieee80211_mgmt *mgmt;
1065         u16 capab;
1066
1067         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1068                                 sizeof(mgmt->u.action.u.addba_req));
1069
1070
1071         if (!skb) {
1072                 printk(KERN_ERR "%s: failed to allocate buffer "
1073                                 "for addba request frame\n", dev->name);
1074                 return;
1075         }
1076         skb_reserve(skb, local->hw.extra_tx_headroom);
1077         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1078         memset(mgmt, 0, 24);
1079         memcpy(mgmt->da, da, ETH_ALEN);
1080         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1081         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1082                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1083         else
1084                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1085
1086         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1087                                         IEEE80211_STYPE_ACTION);
1088
1089         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1090
1091         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1092         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1093
1094         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1095         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1096         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1097         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1098
1099         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1100
1101         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1102         mgmt->u.action.u.addba_req.start_seq_num =
1103                                         cpu_to_le16(start_seq_num << 4);
1104
1105         ieee80211_sta_tx(dev, skb, 0);
1106 }
1107
1108 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1109                                                 struct ieee80211_mgmt *mgmt,
1110                                                 size_t len)
1111 {
1112         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1113         struct ieee80211_hw *hw = &local->hw;
1114         struct ieee80211_conf *conf = &hw->conf;
1115         struct sta_info *sta;
1116         struct tid_ampdu_rx *tid_agg_rx;
1117         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1118         u8 dialog_token;
1119         int ret = -EOPNOTSUPP;
1120         DECLARE_MAC_BUF(mac);
1121
1122         sta = sta_info_get(local, mgmt->sa);
1123         if (!sta)
1124                 return;
1125
1126         /* extract session parameters from addba request frame */
1127         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1128         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1129         start_seq_num =
1130                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1131
1132         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1133         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1134         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1135         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1136
1137         status = WLAN_STATUS_REQUEST_DECLINED;
1138
1139         /* sanity check for incoming parameters:
1140          * check if configuration can support the BA policy
1141          * and if buffer size does not exceeds max value */
1142         if (((ba_policy != 1)
1143                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1144                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1145                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1146 #ifdef CONFIG_MAC80211_HT_DEBUG
1147                 if (net_ratelimit())
1148                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1149                                 "%s on tid %u. policy %d, buffer size %d\n",
1150                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1151                                 buf_size);
1152 #endif /* CONFIG_MAC80211_HT_DEBUG */
1153                 goto end_no_lock;
1154         }
1155         /* determine default buffer size */
1156         if (buf_size == 0) {
1157                 struct ieee80211_supported_band *sband;
1158
1159                 sband = local->hw.wiphy->bands[conf->channel->band];
1160                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1161                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1162         }
1163
1164         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1165
1166         /* examine state machine */
1167         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1168
1169         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1170 #ifdef CONFIG_MAC80211_HT_DEBUG
1171                 if (net_ratelimit())
1172                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1173                                 "%s on tid %u\n",
1174                                 print_mac(mac, mgmt->sa), tid);
1175 #endif /* CONFIG_MAC80211_HT_DEBUG */
1176                 goto end;
1177         }
1178
1179         /* prepare reordering buffer */
1180         tid_agg_rx->reorder_buf =
1181                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1182         if (!tid_agg_rx->reorder_buf) {
1183                 if (net_ratelimit())
1184                         printk(KERN_ERR "can not allocate reordering buffer "
1185                                "to tid %d\n", tid);
1186                 goto end;
1187         }
1188         memset(tid_agg_rx->reorder_buf, 0,
1189                 buf_size * sizeof(struct sk_buf *));
1190
1191         if (local->ops->ampdu_action)
1192                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1193                                                sta->addr, tid, &start_seq_num);
1194 #ifdef CONFIG_MAC80211_HT_DEBUG
1195         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1196 #endif /* CONFIG_MAC80211_HT_DEBUG */
1197
1198         if (ret) {
1199                 kfree(tid_agg_rx->reorder_buf);
1200                 goto end;
1201         }
1202
1203         /* change state and send addba resp */
1204         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1205         tid_agg_rx->dialog_token = dialog_token;
1206         tid_agg_rx->ssn = start_seq_num;
1207         tid_agg_rx->head_seq_num = start_seq_num;
1208         tid_agg_rx->buf_size = buf_size;
1209         tid_agg_rx->timeout = timeout;
1210         tid_agg_rx->stored_mpdu_num = 0;
1211         status = WLAN_STATUS_SUCCESS;
1212 end:
1213         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1214
1215 end_no_lock:
1216         ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1217                                 status, 1, buf_size, timeout);
1218         sta_info_put(sta);
1219 }
1220
1221 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1222                                              struct ieee80211_mgmt *mgmt,
1223                                              size_t len)
1224 {
1225         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1226         struct ieee80211_hw *hw = &local->hw;
1227         struct sta_info *sta;
1228         u16 capab;
1229         u16 tid;
1230         u8 *state;
1231
1232         sta = sta_info_get(local, mgmt->sa);
1233         if (!sta)
1234                 return;
1235
1236         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1237         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1238
1239         state = &sta->ampdu_mlme.tid_tx[tid].state;
1240
1241         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1242
1243         if (mgmt->u.action.u.addba_resp.dialog_token !=
1244                 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1245                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1246 #ifdef CONFIG_MAC80211_HT_DEBUG
1247                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1248 #endif /* CONFIG_MAC80211_HT_DEBUG */
1249                 sta_info_put(sta);
1250                 return;
1251         }
1252
1253         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1254 #ifdef CONFIG_MAC80211_HT_DEBUG
1255         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1256 #endif /* CONFIG_MAC80211_HT_DEBUG */
1257         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1258                         == WLAN_STATUS_SUCCESS) {
1259                 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1260                         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1261                         printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1262                                 "%d\n", *state);
1263                         sta_info_put(sta);
1264                         return;
1265                 }
1266
1267                 if (*state & HT_ADDBA_RECEIVED_MSK)
1268                         printk(KERN_DEBUG "double addBA response\n");
1269
1270                 *state |= HT_ADDBA_RECEIVED_MSK;
1271                 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1272
1273                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1274                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1275                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1276                 }
1277
1278                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1279                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1280         } else {
1281                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1282
1283                 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1284                 /* this will allow the state check in stop_BA_session */
1285                 *state = HT_AGG_STATE_OPERATIONAL;
1286                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1287                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1288                                              WLAN_BACK_INITIATOR);
1289         }
1290         sta_info_put(sta);
1291 }
1292
1293 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1294                           u16 initiator, u16 reason_code)
1295 {
1296         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1297         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1298         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1299         struct sk_buff *skb;
1300         struct ieee80211_mgmt *mgmt;
1301         u16 params;
1302
1303         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1304                                         sizeof(mgmt->u.action.u.delba));
1305
1306         if (!skb) {
1307                 printk(KERN_ERR "%s: failed to allocate buffer "
1308                                         "for delba frame\n", dev->name);
1309                 return;
1310         }
1311
1312         skb_reserve(skb, local->hw.extra_tx_headroom);
1313         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1314         memset(mgmt, 0, 24);
1315         memcpy(mgmt->da, da, ETH_ALEN);
1316         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1317         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1318                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1319         else
1320                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1321         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1322                                         IEEE80211_STYPE_ACTION);
1323
1324         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1325
1326         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1327         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1328         params = (u16)(initiator << 11);        /* bit 11 initiator */
1329         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1330
1331         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1332         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1333
1334         ieee80211_sta_tx(dev, skb, 0);
1335 }
1336
1337 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1338                                         u16 initiator, u16 reason)
1339 {
1340         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1341         struct ieee80211_hw *hw = &local->hw;
1342         struct sta_info *sta;
1343         int ret, i;
1344
1345         sta = sta_info_get(local, ra);
1346         if (!sta)
1347                 return;
1348
1349         /* check if TID is in operational state */
1350         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1351         if (sta->ampdu_mlme.tid_rx[tid].state
1352                                 != HT_AGG_STATE_OPERATIONAL) {
1353                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1354                 sta_info_put(sta);
1355                 return;
1356         }
1357         sta->ampdu_mlme.tid_rx[tid].state =
1358                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1359                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1360                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1361
1362         /* stop HW Rx aggregation. ampdu_action existence
1363          * already verified in session init so we add the BUG_ON */
1364         BUG_ON(!local->ops->ampdu_action);
1365
1366         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1367                                         ra, tid, NULL);
1368         if (ret)
1369                 printk(KERN_DEBUG "HW problem - can not stop rx "
1370                                 "aggergation for tid %d\n", tid);
1371
1372         /* shutdown timer has not expired */
1373         if (initiator != WLAN_BACK_TIMER)
1374                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1375                                         session_timer);
1376
1377         /* check if this is a self generated aggregation halt */
1378         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1379                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1380
1381         /* free the reordering buffer */
1382         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1383                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1384                         /* release the reordered frames */
1385                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1386                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1387                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1388                 }
1389         }
1390         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1391
1392         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1393         sta_info_put(sta);
1394 }
1395
1396
1397 static void ieee80211_sta_process_delba(struct net_device *dev,
1398                         struct ieee80211_mgmt *mgmt, size_t len)
1399 {
1400         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1401         struct sta_info *sta;
1402         u16 tid, params;
1403         u16 initiator;
1404         DECLARE_MAC_BUF(mac);
1405
1406         sta = sta_info_get(local, mgmt->sa);
1407         if (!sta)
1408                 return;
1409
1410         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1411         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1412         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1413
1414 #ifdef CONFIG_MAC80211_HT_DEBUG
1415         if (net_ratelimit())
1416                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1417                         print_mac(mac, mgmt->sa),
1418                         initiator ? "recipient" : "initiator", tid,
1419                         mgmt->u.action.u.delba.reason_code);
1420 #endif /* CONFIG_MAC80211_HT_DEBUG */
1421
1422         if (initiator == WLAN_BACK_INITIATOR)
1423                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1424                                                  WLAN_BACK_INITIATOR, 0);
1425         else { /* WLAN_BACK_RECIPIENT */
1426                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1427                 sta->ampdu_mlme.tid_tx[tid].state =
1428                                 HT_AGG_STATE_OPERATIONAL;
1429                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1430                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1431                                              WLAN_BACK_RECIPIENT);
1432         }
1433         sta_info_put(sta);
1434 }
1435
1436 /*
1437  * After sending add Block Ack request we activated a timer until
1438  * add Block Ack response will arrive from the recipient.
1439  * If this timer expires sta_addba_resp_timer_expired will be executed.
1440  */
1441 void sta_addba_resp_timer_expired(unsigned long data)
1442 {
1443         /* not an elegant detour, but there is no choice as the timer passes
1444          * only one argument, and both sta_info and TID are needed, so init
1445          * flow in sta_info_add gives the TID as data, while the timer_to_id
1446          * array gives the sta through container_of */
1447         u16 tid = *(int *)data;
1448         struct sta_info *temp_sta = container_of((void *)data,
1449                 struct sta_info, timer_to_tid[tid]);
1450
1451         struct ieee80211_local *local = temp_sta->local;
1452         struct ieee80211_hw *hw = &local->hw;
1453         struct sta_info *sta;
1454         u8 *state;
1455
1456         sta = sta_info_get(local, temp_sta->addr);
1457         if (!sta)
1458                 return;
1459
1460         state = &sta->ampdu_mlme.tid_tx[tid].state;
1461         /* check if the TID waits for addBA response */
1462         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1463         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1464                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1465                 *state = HT_AGG_STATE_IDLE;
1466                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1467                                 "expecting addBA response there", tid);
1468                 goto timer_expired_exit;
1469         }
1470
1471         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1472
1473         /* go through the state check in stop_BA_session */
1474         *state = HT_AGG_STATE_OPERATIONAL;
1475         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1476         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1477                                      WLAN_BACK_INITIATOR);
1478
1479 timer_expired_exit:
1480         sta_info_put(sta);
1481 }
1482
1483 /*
1484  * After receiving Block Ack Request (BAR) we activated a
1485  * timer after each frame arrives from the originator.
1486  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1487  */
1488 void sta_rx_agg_session_timer_expired(unsigned long data)
1489 {
1490         /* not an elegant detour, but there is no choice as the timer passes
1491          * only one argument, and verious sta_info are needed here, so init
1492          * flow in sta_info_add gives the TID as data, while the timer_to_id
1493          * array gives the sta through container_of */
1494         u8 *ptid = (u8 *)data;
1495         u8 *timer_to_id = ptid - *ptid;
1496         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1497                                          timer_to_tid[0]);
1498
1499         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1500         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1501                                          WLAN_BACK_TIMER,
1502                                          WLAN_REASON_QSTA_TIMEOUT);
1503 }
1504
1505
1506 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1507                                    struct ieee80211_if_sta *ifsta,
1508                                    struct ieee80211_mgmt *mgmt,
1509                                    size_t len)
1510 {
1511         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1512         u16 auth_alg, auth_transaction, status_code;
1513         DECLARE_MAC_BUF(mac);
1514
1515         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1516             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1517                 printk(KERN_DEBUG "%s: authentication frame received from "
1518                        "%s, but not in authenticate state - ignored\n",
1519                        dev->name, print_mac(mac, mgmt->sa));
1520                 return;
1521         }
1522
1523         if (len < 24 + 6) {
1524                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1525                        "received from %s - ignored\n",
1526                        dev->name, len, print_mac(mac, mgmt->sa));
1527                 return;
1528         }
1529
1530         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1531             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1532                 printk(KERN_DEBUG "%s: authentication frame received from "
1533                        "unknown AP (SA=%s BSSID=%s) - "
1534                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1535                        print_mac(mac, mgmt->bssid));
1536                 return;
1537         }
1538
1539         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1540             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1541                 printk(KERN_DEBUG "%s: authentication frame received from "
1542                        "unknown BSSID (SA=%s BSSID=%s) - "
1543                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1544                        print_mac(mac, mgmt->bssid));
1545                 return;
1546         }
1547
1548         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1549         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1550         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1551
1552         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1553                "transaction=%d status=%d)\n",
1554                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1555                auth_transaction, status_code);
1556
1557         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1558                 /* IEEE 802.11 standard does not require authentication in IBSS
1559                  * networks and most implementations do not seem to use it.
1560                  * However, try to reply to authentication attempts if someone
1561                  * has actually implemented this.
1562                  * TODO: Could implement shared key authentication. */
1563                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1564                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1565                                "frame (alg=%d transaction=%d)\n",
1566                                dev->name, auth_alg, auth_transaction);
1567                         return;
1568                 }
1569                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1570         }
1571
1572         if (auth_alg != ifsta->auth_alg ||
1573             auth_transaction != ifsta->auth_transaction) {
1574                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1575                        "(alg=%d transaction=%d)\n",
1576                        dev->name, auth_alg, auth_transaction);
1577                 return;
1578         }
1579
1580         if (status_code != WLAN_STATUS_SUCCESS) {
1581                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1582                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1583                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1584                         u8 algs[3];
1585                         const int num_algs = ARRAY_SIZE(algs);
1586                         int i, pos;
1587                         algs[0] = algs[1] = algs[2] = 0xff;
1588                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1589                                 algs[0] = WLAN_AUTH_OPEN;
1590                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1591                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1592                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1593                                 algs[2] = WLAN_AUTH_LEAP;
1594                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1595                                 pos = 0;
1596                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1597                                 pos = 1;
1598                         else
1599                                 pos = 2;
1600                         for (i = 0; i < num_algs; i++) {
1601                                 pos++;
1602                                 if (pos >= num_algs)
1603                                         pos = 0;
1604                                 if (algs[pos] == ifsta->auth_alg ||
1605                                     algs[pos] == 0xff)
1606                                         continue;
1607                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1608                                     !ieee80211_sta_wep_configured(dev))
1609                                         continue;
1610                                 ifsta->auth_alg = algs[pos];
1611                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1612                                        "next try\n",
1613                                        dev->name, ifsta->auth_alg);
1614                                 break;
1615                         }
1616                 }
1617                 return;
1618         }
1619
1620         switch (ifsta->auth_alg) {
1621         case WLAN_AUTH_OPEN:
1622         case WLAN_AUTH_LEAP:
1623                 ieee80211_auth_completed(dev, ifsta);
1624                 break;
1625         case WLAN_AUTH_SHARED_KEY:
1626                 if (ifsta->auth_transaction == 4)
1627                         ieee80211_auth_completed(dev, ifsta);
1628                 else
1629                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1630                 break;
1631         }
1632 }
1633
1634
1635 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1636                                      struct ieee80211_if_sta *ifsta,
1637                                      struct ieee80211_mgmt *mgmt,
1638                                      size_t len)
1639 {
1640         u16 reason_code;
1641         DECLARE_MAC_BUF(mac);
1642
1643         if (len < 24 + 2) {
1644                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1645                        "received from %s - ignored\n",
1646                        dev->name, len, print_mac(mac, mgmt->sa));
1647                 return;
1648         }
1649
1650         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1651                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1652                        "unknown AP (SA=%s BSSID=%s) - "
1653                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1654                        print_mac(mac, mgmt->bssid));
1655                 return;
1656         }
1657
1658         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1659
1660         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1661                " (reason=%d)\n",
1662                dev->name, print_mac(mac, mgmt->sa), reason_code);
1663
1664         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1665                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1666         }
1667
1668         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1669             ifsta->state == IEEE80211_ASSOCIATE ||
1670             ifsta->state == IEEE80211_ASSOCIATED) {
1671                 ifsta->state = IEEE80211_AUTHENTICATE;
1672                 mod_timer(&ifsta->timer, jiffies +
1673                                       IEEE80211_RETRY_AUTH_INTERVAL);
1674         }
1675
1676         ieee80211_set_disassoc(dev, ifsta, 1);
1677         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1678 }
1679
1680
1681 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1682                                        struct ieee80211_if_sta *ifsta,
1683                                        struct ieee80211_mgmt *mgmt,
1684                                        size_t len)
1685 {
1686         u16 reason_code;
1687         DECLARE_MAC_BUF(mac);
1688
1689         if (len < 24 + 2) {
1690                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1691                        "received from %s - ignored\n",
1692                        dev->name, len, print_mac(mac, mgmt->sa));
1693                 return;
1694         }
1695
1696         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1697                 printk(KERN_DEBUG "%s: disassociation frame received from "
1698                        "unknown AP (SA=%s BSSID=%s) - "
1699                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1700                        print_mac(mac, mgmt->bssid));
1701                 return;
1702         }
1703
1704         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1705
1706         printk(KERN_DEBUG "%s: RX disassociation from %s"
1707                " (reason=%d)\n",
1708                dev->name, print_mac(mac, mgmt->sa), reason_code);
1709
1710         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1711                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1712
1713         if (ifsta->state == IEEE80211_ASSOCIATED) {
1714                 ifsta->state = IEEE80211_ASSOCIATE;
1715                 mod_timer(&ifsta->timer, jiffies +
1716                                       IEEE80211_RETRY_AUTH_INTERVAL);
1717         }
1718
1719         ieee80211_set_disassoc(dev, ifsta, 0);
1720 }
1721
1722
1723 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1724                                          struct ieee80211_if_sta *ifsta,
1725                                          struct ieee80211_mgmt *mgmt,
1726                                          size_t len,
1727                                          int reassoc)
1728 {
1729         struct ieee80211_local *local = sdata->local;
1730         struct net_device *dev = sdata->dev;
1731         struct ieee80211_supported_band *sband;
1732         struct sta_info *sta;
1733         u64 rates, basic_rates;
1734         u16 capab_info, status_code, aid;
1735         struct ieee802_11_elems elems;
1736         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1737         u8 *pos;
1738         int i, j;
1739         DECLARE_MAC_BUF(mac);
1740         bool have_higher_than_11mbit = false;
1741
1742         /* AssocResp and ReassocResp have identical structure, so process both
1743          * of them in this function. */
1744
1745         if (ifsta->state != IEEE80211_ASSOCIATE) {
1746                 printk(KERN_DEBUG "%s: association frame received from "
1747                        "%s, but not in associate state - ignored\n",
1748                        dev->name, print_mac(mac, mgmt->sa));
1749                 return;
1750         }
1751
1752         if (len < 24 + 6) {
1753                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1754                        "received from %s - ignored\n",
1755                        dev->name, len, print_mac(mac, mgmt->sa));
1756                 return;
1757         }
1758
1759         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1760                 printk(KERN_DEBUG "%s: association frame received from "
1761                        "unknown AP (SA=%s BSSID=%s) - "
1762                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1763                        print_mac(mac, mgmt->bssid));
1764                 return;
1765         }
1766
1767         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1768         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1769         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1770
1771         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1772                "status=%d aid=%d)\n",
1773                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1774                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1775
1776         if (status_code != WLAN_STATUS_SUCCESS) {
1777                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1778                        dev->name, status_code);
1779                 /* if this was a reassociation, ensure we try a "full"
1780                  * association next time. This works around some broken APs
1781                  * which do not correctly reject reassociation requests. */
1782                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1783                 return;
1784         }
1785
1786         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1787                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1788                        "set\n", dev->name, aid);
1789         aid &= ~(BIT(15) | BIT(14));
1790
1791         pos = mgmt->u.assoc_resp.variable;
1792         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1793
1794         if (!elems.supp_rates) {
1795                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1796                        dev->name);
1797                 return;
1798         }
1799
1800         printk(KERN_DEBUG "%s: associated\n", dev->name);
1801         ifsta->aid = aid;
1802         ifsta->ap_capab = capab_info;
1803
1804         kfree(ifsta->assocresp_ies);
1805         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1806         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1807         if (ifsta->assocresp_ies)
1808                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1809
1810         /* Add STA entry for the AP */
1811         sta = sta_info_get(local, ifsta->bssid);
1812         if (!sta) {
1813                 struct ieee80211_sta_bss *bss;
1814                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1815                 if (!sta) {
1816                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1817                                " AP\n", dev->name);
1818                         return;
1819                 }
1820                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1821                                            local->hw.conf.channel->center_freq,
1822                                            ifsta->ssid, ifsta->ssid_len);
1823                 if (bss) {
1824                         sta->last_rssi = bss->rssi;
1825                         sta->last_signal = bss->signal;
1826                         sta->last_noise = bss->noise;
1827                         ieee80211_rx_bss_put(dev, bss);
1828                 }
1829         }
1830
1831         sta->dev = dev;
1832         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1833                       WLAN_STA_AUTHORIZED;
1834
1835         rates = 0;
1836         basic_rates = 0;
1837         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1838
1839         for (i = 0; i < elems.supp_rates_len; i++) {
1840                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1841
1842                 if (rate > 110)
1843                         have_higher_than_11mbit = true;
1844
1845                 for (j = 0; j < sband->n_bitrates; j++) {
1846                         if (sband->bitrates[j].bitrate == rate)
1847                                 rates |= BIT(j);
1848                         if (elems.supp_rates[i] & 0x80)
1849                                 basic_rates |= BIT(j);
1850                 }
1851         }
1852
1853         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1854                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1855
1856                 if (rate > 110)
1857                         have_higher_than_11mbit = true;
1858
1859                 for (j = 0; j < sband->n_bitrates; j++) {
1860                         if (sband->bitrates[j].bitrate == rate)
1861                                 rates |= BIT(j);
1862                         if (elems.ext_supp_rates[i] & 0x80)
1863                                 basic_rates |= BIT(j);
1864                 }
1865         }
1866
1867         sta->supp_rates[local->hw.conf.channel->band] = rates;
1868         sdata->basic_rates = basic_rates;
1869
1870         /* cf. IEEE 802.11 9.2.12 */
1871         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1872             have_higher_than_11mbit)
1873                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1874         else
1875                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1876
1877         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1878             local->ops->conf_ht) {
1879                 struct ieee80211_ht_bss_info bss_info;
1880
1881                 ieee80211_ht_cap_ie_to_ht_info(
1882                                 (struct ieee80211_ht_cap *)
1883                                 elems.ht_cap_elem, &sta->ht_info);
1884                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1885                                 (struct ieee80211_ht_addt_info *)
1886                                 elems.ht_info_elem, &bss_info);
1887                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1888         }
1889
1890         rate_control_rate_init(sta, local);
1891
1892         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1893                 sta->flags |= WLAN_STA_WME;
1894                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1895                                          elems.wmm_param_len);
1896         }
1897
1898         /* set AID, ieee80211_set_associated() will tell the driver */
1899         bss_conf->aid = aid;
1900         ieee80211_set_associated(dev, ifsta, 1);
1901
1902         sta_info_put(sta);
1903
1904         ieee80211_associated(dev, ifsta);
1905 }
1906
1907
1908 /* Caller must hold local->sta_bss_lock */
1909 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1910                                         struct ieee80211_sta_bss *bss)
1911 {
1912         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1913         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1914         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1915 }
1916
1917
1918 /* Caller must hold local->sta_bss_lock */
1919 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1920                                         struct ieee80211_sta_bss *bss)
1921 {
1922         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1923         struct ieee80211_sta_bss *b, *prev = NULL;
1924         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1925         while (b) {
1926                 if (b == bss) {
1927                         if (!prev)
1928                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1929                                         bss->hnext;
1930                         else
1931                                 prev->hnext = bss->hnext;
1932                         break;
1933                 }
1934                 prev = b;
1935                 b = b->hnext;
1936         }
1937 }
1938
1939
1940 static struct ieee80211_sta_bss *
1941 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1942                      u8 *ssid, u8 ssid_len)
1943 {
1944         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1945         struct ieee80211_sta_bss *bss;
1946
1947         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1948         if (!bss)
1949                 return NULL;
1950         atomic_inc(&bss->users);
1951         atomic_inc(&bss->users);
1952         memcpy(bss->bssid, bssid, ETH_ALEN);
1953         bss->freq = freq;
1954         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1955                 memcpy(bss->ssid, ssid, ssid_len);
1956                 bss->ssid_len = ssid_len;
1957         }
1958
1959         spin_lock_bh(&local->sta_bss_lock);
1960         /* TODO: order by RSSI? */
1961         list_add_tail(&bss->list, &local->sta_bss_list);
1962         __ieee80211_rx_bss_hash_add(dev, bss);
1963         spin_unlock_bh(&local->sta_bss_lock);
1964         return bss;
1965 }
1966
1967
1968 static struct ieee80211_sta_bss *
1969 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1970                      u8 *ssid, u8 ssid_len)
1971 {
1972         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1973         struct ieee80211_sta_bss *bss;
1974
1975         spin_lock_bh(&local->sta_bss_lock);
1976         bss = local->sta_bss_hash[STA_HASH(bssid)];
1977         while (bss) {
1978                 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1979                     bss->freq == freq &&
1980                     bss->ssid_len == ssid_len &&
1981                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1982                         atomic_inc(&bss->users);
1983                         break;
1984                 }
1985                 bss = bss->hnext;
1986         }
1987         spin_unlock_bh(&local->sta_bss_lock);
1988         return bss;
1989 }
1990
1991
1992 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1993 {
1994         kfree(bss->wpa_ie);
1995         kfree(bss->rsn_ie);
1996         kfree(bss->wmm_ie);
1997         kfree(bss->ht_ie);
1998         kfree(bss);
1999 }
2000
2001
2002 static void ieee80211_rx_bss_put(struct net_device *dev,
2003                                  struct ieee80211_sta_bss *bss)
2004 {
2005         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2006         if (!atomic_dec_and_test(&bss->users))
2007                 return;
2008
2009         spin_lock_bh(&local->sta_bss_lock);
2010         __ieee80211_rx_bss_hash_del(dev, bss);
2011         list_del(&bss->list);
2012         spin_unlock_bh(&local->sta_bss_lock);
2013         ieee80211_rx_bss_free(bss);
2014 }
2015
2016
2017 void ieee80211_rx_bss_list_init(struct net_device *dev)
2018 {
2019         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2020         spin_lock_init(&local->sta_bss_lock);
2021         INIT_LIST_HEAD(&local->sta_bss_list);
2022 }
2023
2024
2025 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2026 {
2027         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2028         struct ieee80211_sta_bss *bss, *tmp;
2029
2030         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2031                 ieee80211_rx_bss_put(dev, bss);
2032 }
2033
2034
2035 static void ieee80211_rx_bss_info(struct net_device *dev,
2036                                   struct ieee80211_mgmt *mgmt,
2037                                   size_t len,
2038                                   struct ieee80211_rx_status *rx_status,
2039                                   int beacon)
2040 {
2041         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2042         struct ieee802_11_elems elems;
2043         size_t baselen;
2044         int freq, clen;
2045         struct ieee80211_sta_bss *bss;
2046         struct sta_info *sta;
2047         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2048         u64 timestamp;
2049         DECLARE_MAC_BUF(mac);
2050         DECLARE_MAC_BUF(mac2);
2051
2052         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2053                 return; /* ignore ProbeResp to foreign address */
2054
2055 #if 0
2056         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2057                dev->name, beacon ? "Beacon" : "Probe Response",
2058                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2059 #endif
2060
2061         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2062         if (baselen > len)
2063                 return;
2064
2065         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2066
2067         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2068             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2069 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2070                 static unsigned long last_tsf_debug = 0;
2071                 u64 tsf;
2072                 if (local->ops->get_tsf)
2073                         tsf = local->ops->get_tsf(local_to_hw(local));
2074                 else
2075                         tsf = -1LLU;
2076                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
2077                         printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2078                                "%s TSF=0x%llx BCN=0x%llx diff=%lld "
2079                                "@%lu\n",
2080                                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
2081                                (unsigned long long)tsf,
2082                                (unsigned long long)timestamp,
2083                                (unsigned long long)(tsf - timestamp),
2084                                jiffies);
2085                         last_tsf_debug = jiffies;
2086                 }
2087 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2088         }
2089
2090         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2091
2092         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2093             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2094             (sta = sta_info_get(local, mgmt->sa))) {
2095                 struct ieee80211_supported_band *sband;
2096                 struct ieee80211_rate *bitrates;
2097                 size_t num_rates;
2098                 u64 supp_rates, prev_rates;
2099                 int i, j;
2100
2101                 sband = local->hw.wiphy->bands[rx_status->band];
2102
2103                 if (!sband) {
2104                         WARN_ON(1);
2105                         sband = local->hw.wiphy->bands[
2106                                         local->hw.conf.channel->band];
2107                 }
2108
2109                 bitrates = sband->bitrates;
2110                 num_rates = sband->n_bitrates;
2111
2112                 supp_rates = 0;
2113                 for (i = 0; i < elems.supp_rates_len +
2114                              elems.ext_supp_rates_len; i++) {
2115                         u8 rate = 0;
2116                         int own_rate;
2117                         if (i < elems.supp_rates_len)
2118                                 rate = elems.supp_rates[i];
2119                         else if (elems.ext_supp_rates)
2120                                 rate = elems.ext_supp_rates
2121                                         [i - elems.supp_rates_len];
2122                         own_rate = 5 * (rate & 0x7f);
2123                         for (j = 0; j < num_rates; j++)
2124                                 if (bitrates[j].bitrate == own_rate)
2125                                         supp_rates |= BIT(j);
2126                 }
2127
2128                 prev_rates = sta->supp_rates[rx_status->band];
2129                 sta->supp_rates[rx_status->band] &= supp_rates;
2130                 if (sta->supp_rates[rx_status->band] == 0) {
2131                         /* No matching rates - this should not really happen.
2132                          * Make sure that at least one rate is marked
2133                          * supported to avoid issues with TX rate ctrl. */
2134                         sta->supp_rates[rx_status->band] =
2135                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2136                 }
2137                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2138                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2139                                "%s based on beacon info (0x%llx & 0x%llx -> "
2140                                "0x%llx)\n",
2141                                dev->name, print_mac(mac, sta->addr),
2142                                (unsigned long long) prev_rates,
2143                                (unsigned long long) supp_rates,
2144                                (unsigned long long) sta->supp_rates[rx_status->band]);
2145                 }
2146                 sta_info_put(sta);
2147         }
2148
2149         if (!elems.ssid)
2150                 return;
2151
2152         if (elems.ds_params && elems.ds_params_len == 1)
2153                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2154         else
2155                 freq = rx_status->freq;
2156
2157         bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2158                                    elems.ssid, elems.ssid_len);
2159         if (!bss) {
2160                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2161                                            elems.ssid, elems.ssid_len);
2162                 if (!bss)
2163                         return;
2164         } else {
2165 #if 0
2166                 /* TODO: order by RSSI? */
2167                 spin_lock_bh(&local->sta_bss_lock);
2168                 list_move_tail(&bss->list, &local->sta_bss_list);
2169                 spin_unlock_bh(&local->sta_bss_lock);
2170 #endif
2171         }
2172
2173         bss->band = rx_status->band;
2174
2175         if (bss->probe_resp && beacon) {
2176                 /* Do not allow beacon to override data from Probe Response. */
2177                 ieee80211_rx_bss_put(dev, bss);
2178                 return;
2179         }
2180
2181         /* save the ERP value so that it is available at association time */
2182         if (elems.erp_info && elems.erp_info_len >= 1) {
2183                 bss->erp_value = elems.erp_info[0];
2184                 bss->has_erp_value = 1;
2185         }
2186
2187         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2188         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2189
2190         bss->supp_rates_len = 0;
2191         if (elems.supp_rates) {
2192                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2193                 if (clen > elems.supp_rates_len)
2194                         clen = elems.supp_rates_len;
2195                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2196                        clen);
2197                 bss->supp_rates_len += clen;
2198         }
2199         if (elems.ext_supp_rates) {
2200                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2201                 if (clen > elems.ext_supp_rates_len)
2202                         clen = elems.ext_supp_rates_len;
2203                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2204                        elems.ext_supp_rates, clen);
2205                 bss->supp_rates_len += clen;
2206         }
2207
2208         if (elems.wpa &&
2209             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2210              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2211                 kfree(bss->wpa_ie);
2212                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2213                 if (bss->wpa_ie) {
2214                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2215                         bss->wpa_ie_len = elems.wpa_len + 2;
2216                 } else
2217                         bss->wpa_ie_len = 0;
2218         } else if (!elems.wpa && bss->wpa_ie) {
2219                 kfree(bss->wpa_ie);
2220                 bss->wpa_ie = NULL;
2221                 bss->wpa_ie_len = 0;
2222         }
2223
2224         if (elems.rsn &&
2225             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2226              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2227                 kfree(bss->rsn_ie);
2228                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2229                 if (bss->rsn_ie) {
2230                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2231                         bss->rsn_ie_len = elems.rsn_len + 2;
2232                 } else
2233                         bss->rsn_ie_len = 0;
2234         } else if (!elems.rsn && bss->rsn_ie) {
2235                 kfree(bss->rsn_ie);
2236                 bss->rsn_ie = NULL;
2237                 bss->rsn_ie_len = 0;
2238         }
2239
2240         if (elems.wmm_param &&
2241             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2242              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2243                 kfree(bss->wmm_ie);
2244                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2245                 if (bss->wmm_ie) {
2246                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2247                                elems.wmm_param_len + 2);
2248                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2249                 } else
2250                         bss->wmm_ie_len = 0;
2251         } else if (!elems.wmm_param && bss->wmm_ie) {
2252                 kfree(bss->wmm_ie);
2253                 bss->wmm_ie = NULL;
2254                 bss->wmm_ie_len = 0;
2255         }
2256         if (elems.ht_cap_elem &&
2257             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2258              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2259                 kfree(bss->ht_ie);
2260                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2261                 if (bss->ht_ie) {
2262                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2263                                elems.ht_cap_elem_len + 2);
2264                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2265                 } else
2266                         bss->ht_ie_len = 0;
2267         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2268                 kfree(bss->ht_ie);
2269                 bss->ht_ie = NULL;
2270                 bss->ht_ie_len = 0;
2271         }
2272
2273         bss->timestamp = timestamp;
2274         bss->last_update = jiffies;
2275         bss->rssi = rx_status->ssi;
2276         bss->signal = rx_status->signal;
2277         bss->noise = rx_status->noise;
2278         if (!beacon)
2279                 bss->probe_resp++;
2280         ieee80211_rx_bss_put(dev, bss);
2281 }
2282
2283
2284 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2285                                          struct ieee80211_mgmt *mgmt,
2286                                          size_t len,
2287                                          struct ieee80211_rx_status *rx_status)
2288 {
2289         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2290 }
2291
2292
2293 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2294                                      struct ieee80211_mgmt *mgmt,
2295                                      size_t len,
2296                                      struct ieee80211_rx_status *rx_status)
2297 {
2298         struct ieee80211_sub_if_data *sdata;
2299         struct ieee80211_if_sta *ifsta;
2300         size_t baselen;
2301         struct ieee802_11_elems elems;
2302         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2303         struct ieee80211_conf *conf = &local->hw.conf;
2304         u32 changed = 0;
2305
2306         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2307
2308         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2309         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2310                 return;
2311         ifsta = &sdata->u.sta;
2312
2313         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2314             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2315                 return;
2316
2317         /* Process beacon from the current BSS */
2318         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2319         if (baselen > len)
2320                 return;
2321
2322         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2323
2324         if (elems.erp_info && elems.erp_info_len >= 1)
2325                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2326
2327         if (elems.ht_cap_elem && elems.ht_info_elem &&
2328             elems.wmm_param && local->ops->conf_ht &&
2329             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2330                 struct ieee80211_ht_bss_info bss_info;
2331
2332                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2333                                 (struct ieee80211_ht_addt_info *)
2334                                 elems.ht_info_elem, &bss_info);
2335                 /* check if AP changed bss inforamation */
2336                 if ((conf->ht_bss_conf.primary_channel !=
2337                      bss_info.primary_channel) ||
2338                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2339                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2340                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2341                                                 &bss_info);
2342         }
2343
2344         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2345                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2346                                          elems.wmm_param_len);
2347         }
2348
2349         ieee80211_bss_info_change_notify(sdata, changed);
2350 }
2351
2352
2353 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2354                                         struct ieee80211_if_sta *ifsta,
2355                                         struct ieee80211_mgmt *mgmt,
2356                                         size_t len,
2357                                         struct ieee80211_rx_status *rx_status)
2358 {
2359         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2360         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2361         int tx_last_beacon;
2362         struct sk_buff *skb;
2363         struct ieee80211_mgmt *resp;
2364         u8 *pos, *end;
2365         DECLARE_MAC_BUF(mac);
2366 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2367         DECLARE_MAC_BUF(mac2);
2368         DECLARE_MAC_BUF(mac3);
2369 #endif
2370
2371         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2372             ifsta->state != IEEE80211_IBSS_JOINED ||
2373             len < 24 + 2 || !ifsta->probe_resp)
2374                 return;
2375
2376         if (local->ops->tx_last_beacon)
2377                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2378         else
2379                 tx_last_beacon = 1;
2380
2381 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2382         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2383                "%s (tx_last_beacon=%d)\n",
2384                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2385                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2386 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2387
2388         if (!tx_last_beacon)
2389                 return;
2390
2391         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2392             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2393                 return;
2394
2395         end = ((u8 *) mgmt) + len;
2396         pos = mgmt->u.probe_req.variable;
2397         if (pos[0] != WLAN_EID_SSID ||
2398             pos + 2 + pos[1] > end) {
2399                 if (net_ratelimit()) {
2400                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2401                                "from %s\n",
2402                                dev->name, print_mac(mac, mgmt->sa));
2403                 }
2404                 return;
2405         }
2406         if (pos[1] != 0 &&
2407             (pos[1] != ifsta->ssid_len ||
2408              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2409                 /* Ignore ProbeReq for foreign SSID */
2410                 return;
2411         }
2412
2413         /* Reply with ProbeResp */
2414         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2415         if (!skb)
2416                 return;
2417
2418         resp = (struct ieee80211_mgmt *) skb->data;
2419         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2420 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2421         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2422                dev->name, print_mac(mac, resp->da));
2423 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2424         ieee80211_sta_tx(dev, skb, 0);
2425 }
2426
2427 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2428                                      struct ieee80211_if_sta *ifsta,
2429                                      struct ieee80211_mgmt *mgmt,
2430                                      size_t len)
2431 {
2432         if (len < IEEE80211_MIN_ACTION_SIZE)
2433                 return;
2434
2435         switch (mgmt->u.action.category) {
2436         case WLAN_CATEGORY_BACK:
2437                 switch (mgmt->u.action.u.addba_req.action_code) {
2438                 case WLAN_ACTION_ADDBA_REQ:
2439                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2440                                    sizeof(mgmt->u.action.u.addba_req)))
2441                                 break;
2442                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2443                         break;
2444                 case WLAN_ACTION_ADDBA_RESP:
2445                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2446                                    sizeof(mgmt->u.action.u.addba_resp)))
2447                                 break;
2448                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2449                         break;
2450                 case WLAN_ACTION_DELBA:
2451                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2452                                    sizeof(mgmt->u.action.u.delba)))
2453                                 break;
2454                         ieee80211_sta_process_delba(dev, mgmt, len);
2455                         break;
2456                 default:
2457                         if (net_ratelimit())
2458                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2459                                         dev->name);
2460                         break;
2461                 }
2462                 break;
2463         default:
2464                 break;
2465         }
2466 }
2467
2468 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2469                            struct ieee80211_rx_status *rx_status)
2470 {
2471         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2472         struct ieee80211_sub_if_data *sdata;
2473         struct ieee80211_if_sta *ifsta;
2474         struct ieee80211_mgmt *mgmt;
2475         u16 fc;
2476
2477         if (skb->len < 24)
2478                 goto fail;
2479
2480         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2481         ifsta = &sdata->u.sta;
2482
2483         mgmt = (struct ieee80211_mgmt *) skb->data;
2484         fc = le16_to_cpu(mgmt->frame_control);
2485
2486         switch (fc & IEEE80211_FCTL_STYPE) {
2487         case IEEE80211_STYPE_PROBE_REQ:
2488         case IEEE80211_STYPE_PROBE_RESP:
2489         case IEEE80211_STYPE_BEACON:
2490                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2491         case IEEE80211_STYPE_AUTH:
2492         case IEEE80211_STYPE_ASSOC_RESP:
2493         case IEEE80211_STYPE_REASSOC_RESP:
2494         case IEEE80211_STYPE_DEAUTH:
2495         case IEEE80211_STYPE_DISASSOC:
2496         case IEEE80211_STYPE_ACTION:
2497                 skb_queue_tail(&ifsta->skb_queue, skb);
2498                 queue_work(local->hw.workqueue, &ifsta->work);
2499                 return;
2500         default:
2501                 printk(KERN_DEBUG "%s: received unknown management frame - "
2502                        "stype=%d\n", dev->name,
2503                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2504                 break;
2505         }
2506
2507  fail:
2508         kfree_skb(skb);
2509 }
2510
2511
2512 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2513                                          struct sk_buff *skb)
2514 {
2515         struct ieee80211_rx_status *rx_status;
2516         struct ieee80211_sub_if_data *sdata;
2517         struct ieee80211_if_sta *ifsta;
2518         struct ieee80211_mgmt *mgmt;
2519         u16 fc;
2520
2521         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2522         ifsta = &sdata->u.sta;
2523
2524         rx_status = (struct ieee80211_rx_status *) skb->cb;
2525         mgmt = (struct ieee80211_mgmt *) skb->data;
2526         fc = le16_to_cpu(mgmt->frame_control);
2527
2528         switch (fc & IEEE80211_FCTL_STYPE) {
2529         case IEEE80211_STYPE_PROBE_REQ:
2530                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2531                                             rx_status);
2532                 break;
2533         case IEEE80211_STYPE_PROBE_RESP:
2534                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2535                 break;
2536         case IEEE80211_STYPE_BEACON:
2537                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2538                 break;
2539         case IEEE80211_STYPE_AUTH:
2540                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2541                 break;
2542         case IEEE80211_STYPE_ASSOC_RESP:
2543                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2544                 break;
2545         case IEEE80211_STYPE_REASSOC_RESP:
2546                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2547                 break;
2548         case IEEE80211_STYPE_DEAUTH:
2549                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2550                 break;
2551         case IEEE80211_STYPE_DISASSOC:
2552                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2553                 break;
2554         case IEEE80211_STYPE_ACTION:
2555                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2556                 break;
2557         }
2558
2559         kfree_skb(skb);
2560 }
2561
2562
2563 ieee80211_rx_result
2564 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2565                       struct ieee80211_rx_status *rx_status)
2566 {
2567         struct ieee80211_mgmt *mgmt;
2568         u16 fc;
2569
2570         if (skb->len < 2)
2571                 return RX_DROP_UNUSABLE;
2572
2573         mgmt = (struct ieee80211_mgmt *) skb->data;
2574         fc = le16_to_cpu(mgmt->frame_control);
2575
2576         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2577                 return RX_CONTINUE;
2578
2579         if (skb->len < 24)
2580                 return RX_DROP_MONITOR;
2581
2582         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2583                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2584                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2585                                                      skb->len, rx_status);
2586                         dev_kfree_skb(skb);
2587                         return RX_QUEUED;
2588                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2589                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2590                                                  rx_status);
2591                         dev_kfree_skb(skb);
2592                         return RX_QUEUED;
2593                 }
2594         }
2595         return RX_CONTINUE;
2596 }
2597
2598
2599 static int ieee80211_sta_active_ibss(struct net_device *dev)
2600 {
2601         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2602         int active = 0;
2603         struct sta_info *sta;
2604
2605         read_lock_bh(&local->sta_lock);
2606         list_for_each_entry(sta, &local->sta_list, list) {
2607                 if (sta->dev == dev &&
2608                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2609                                jiffies)) {
2610                         active++;
2611                         break;
2612                 }
2613         }
2614         read_unlock_bh(&local->sta_lock);
2615
2616         return active;
2617 }
2618
2619
2620 static void ieee80211_sta_expire(struct net_device *dev)
2621 {
2622         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2623         struct sta_info *sta, *tmp;
2624         LIST_HEAD(tmp_list);
2625         DECLARE_MAC_BUF(mac);
2626
2627         write_lock_bh(&local->sta_lock);
2628         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2629                 if (time_after(jiffies, sta->last_rx +
2630                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2631                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2632                                dev->name, print_mac(mac, sta->addr));
2633                         __sta_info_get(sta);
2634                         sta_info_remove(sta);
2635                         list_add(&sta->list, &tmp_list);
2636                 }
2637         write_unlock_bh(&local->sta_lock);
2638
2639         list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2640                 sta_info_free(sta);
2641                 sta_info_put(sta);
2642         }
2643 }
2644
2645
2646 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2647                                      struct ieee80211_if_sta *ifsta)
2648 {
2649         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2650
2651         ieee80211_sta_expire(dev);
2652         if (ieee80211_sta_active_ibss(dev))
2653                 return;
2654
2655         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2656                "IBSS networks with same SSID (merge)\n", dev->name);
2657         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2658 }
2659
2660
2661 void ieee80211_sta_timer(unsigned long data)
2662 {
2663         struct ieee80211_sub_if_data *sdata =
2664                 (struct ieee80211_sub_if_data *) data;
2665         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2666         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2667
2668         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2669         queue_work(local->hw.workqueue, &ifsta->work);
2670 }
2671
2672
2673 void ieee80211_sta_work(struct work_struct *work)
2674 {
2675         struct ieee80211_sub_if_data *sdata =
2676                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2677         struct net_device *dev = sdata->dev;
2678         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2679         struct ieee80211_if_sta *ifsta;
2680         struct sk_buff *skb;
2681
2682         if (!netif_running(dev))
2683                 return;
2684
2685         if (local->sta_sw_scanning || local->sta_hw_scanning)
2686                 return;
2687
2688         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2689             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2690                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2691                        "(type=%d)\n", dev->name, sdata->vif.type);
2692                 return;
2693         }
2694         ifsta = &sdata->u.sta;
2695
2696         while ((skb = skb_dequeue(&ifsta->skb_queue)))
2697                 ieee80211_sta_rx_queued_mgmt(dev, skb);
2698
2699         if (ifsta->state != IEEE80211_AUTHENTICATE &&
2700             ifsta->state != IEEE80211_ASSOCIATE &&
2701             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2702                 if (ifsta->scan_ssid_len)
2703                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2704                 else
2705                         ieee80211_sta_start_scan(dev, NULL, 0);
2706                 return;
2707         }
2708
2709         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2710                 if (ieee80211_sta_config_auth(dev, ifsta))
2711                         return;
2712                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2713         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2714                 return;
2715
2716         switch (ifsta->state) {
2717         case IEEE80211_DISABLED:
2718                 break;
2719         case IEEE80211_AUTHENTICATE:
2720                 ieee80211_authenticate(dev, ifsta);
2721                 break;
2722         case IEEE80211_ASSOCIATE:
2723                 ieee80211_associate(dev, ifsta);
2724                 break;
2725         case IEEE80211_ASSOCIATED:
2726                 ieee80211_associated(dev, ifsta);
2727                 break;
2728         case IEEE80211_IBSS_SEARCH:
2729                 ieee80211_sta_find_ibss(dev, ifsta);
2730                 break;
2731         case IEEE80211_IBSS_JOINED:
2732                 ieee80211_sta_merge_ibss(dev, ifsta);
2733                 break;
2734         default:
2735                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2736                        ifsta->state);
2737                 break;
2738         }
2739
2740         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2741                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2742                        "mixed-cell disabled - disassociate\n", dev->name);
2743
2744                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2745                 ieee80211_set_disassoc(dev, ifsta, 0);
2746         }
2747 }
2748
2749
2750 static void ieee80211_sta_reset_auth(struct net_device *dev,
2751                                      struct ieee80211_if_sta *ifsta)
2752 {
2753         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2754
2755         if (local->ops->reset_tsf) {
2756                 /* Reset own TSF to allow time synchronization work. */
2757                 local->ops->reset_tsf(local_to_hw(local));
2758         }
2759
2760         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2761
2762
2763         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2764                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2765         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2766                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2767         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2768                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2769         else
2770                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2771         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2772                ifsta->auth_alg);
2773         ifsta->auth_transaction = -1;
2774         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2775         ifsta->auth_tries = ifsta->assoc_tries = 0;
2776         netif_carrier_off(dev);
2777 }
2778
2779
2780 void ieee80211_sta_req_auth(struct net_device *dev,
2781                             struct ieee80211_if_sta *ifsta)
2782 {
2783         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2784         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2785
2786         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2787                 return;
2788
2789         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2790                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2791             (ifsta->flags & (IEEE80211_STA_SSID_SET |
2792                                 IEEE80211_STA_AUTO_SSID_SEL))) {
2793                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2794                 queue_work(local->hw.workqueue, &ifsta->work);
2795         }
2796 }
2797
2798 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2799                                     const char *ssid, int ssid_len)
2800 {
2801         int tmp, hidden_ssid;
2802
2803         if (ssid_len == ifsta->ssid_len &&
2804             !memcmp(ifsta->ssid, ssid, ssid_len))
2805                 return 1;
2806
2807         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2808                 return 0;
2809
2810         hidden_ssid = 1;
2811         tmp = ssid_len;
2812         while (tmp--) {
2813                 if (ssid[tmp] != '\0') {
2814                         hidden_ssid = 0;
2815                         break;
2816                 }
2817         }
2818
2819         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2820                 return 1;
2821
2822         if (ssid_len == 1 && ssid[0] == ' ')
2823                 return 1;
2824
2825         return 0;
2826 }
2827
2828 static int ieee80211_sta_config_auth(struct net_device *dev,
2829                                      struct ieee80211_if_sta *ifsta)
2830 {
2831         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2832         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2833         struct ieee80211_sta_bss *bss, *selected = NULL;
2834         int top_rssi = 0, freq;
2835
2836         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2837             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2838                 ifsta->state = IEEE80211_AUTHENTICATE;
2839                 ieee80211_sta_reset_auth(dev, ifsta);
2840                 return 0;
2841         }
2842
2843         spin_lock_bh(&local->sta_bss_lock);
2844         freq = local->oper_channel->center_freq;
2845         list_for_each_entry(bss, &local->sta_bss_list, list) {
2846                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2847                         continue;
2848
2849                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2850                     !!sdata->default_key)
2851                         continue;
2852
2853                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2854                     bss->freq != freq)
2855                         continue;
2856
2857                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2858                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2859                         continue;
2860
2861                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2862                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2863                         continue;
2864
2865                 if (!selected || top_rssi < bss->rssi) {
2866                         selected = bss;
2867                         top_rssi = bss->rssi;
2868                 }
2869         }
2870         if (selected)
2871                 atomic_inc(&selected->users);
2872         spin_unlock_bh(&local->sta_bss_lock);
2873
2874         if (selected) {
2875                 ieee80211_set_freq(local, selected->freq);
2876                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2877                         ieee80211_sta_set_ssid(dev, selected->ssid,
2878                                                selected->ssid_len);
2879                 ieee80211_sta_set_bssid(dev, selected->bssid);
2880                 ieee80211_rx_bss_put(dev, selected);
2881                 ifsta->state = IEEE80211_AUTHENTICATE;
2882                 ieee80211_sta_reset_auth(dev, ifsta);
2883                 return 0;
2884         } else {
2885                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2886                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2887                                 ieee80211_sta_start_scan(dev, NULL, 0);
2888                         else
2889                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2890                                                          ifsta->ssid_len);
2891                         ifsta->state = IEEE80211_AUTHENTICATE;
2892                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2893                 } else
2894                         ifsta->state = IEEE80211_DISABLED;
2895         }
2896         return -1;
2897 }
2898
2899 static int ieee80211_sta_join_ibss(struct net_device *dev,
2900                                    struct ieee80211_if_sta *ifsta,
2901                                    struct ieee80211_sta_bss *bss)
2902 {
2903         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2904         int res, rates, i, j;
2905         struct sk_buff *skb;
2906         struct ieee80211_mgmt *mgmt;
2907         struct ieee80211_tx_control control;
2908         struct rate_selection ratesel;
2909         u8 *pos;
2910         struct ieee80211_sub_if_data *sdata;
2911         struct ieee80211_supported_band *sband;
2912
2913         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2914
2915         /* Remove possible STA entries from other IBSS networks. */
2916         sta_info_flush(local, NULL);
2917
2918         if (local->ops->reset_tsf) {
2919                 /* Reset own TSF to allow time synchronization work. */
2920                 local->ops->reset_tsf(local_to_hw(local));
2921         }
2922         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2923         res = ieee80211_if_config(dev);
2924         if (res)
2925                 return res;
2926
2927         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2928
2929         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2930         sdata->drop_unencrypted = bss->capability &
2931                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2932
2933         res = ieee80211_set_freq(local, bss->freq);
2934
2935         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2936                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2937                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2938                 return -1;
2939         }
2940
2941         /* Set beacon template based on scan results */
2942         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2943         do {
2944                 if (!skb)
2945                         break;
2946
2947                 skb_reserve(skb, local->hw.extra_tx_headroom);
2948
2949                 mgmt = (struct ieee80211_mgmt *)
2950                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2951                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2952                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2953                                                    IEEE80211_STYPE_BEACON);
2954                 memset(mgmt->da, 0xff, ETH_ALEN);
2955                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2956                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2957                 mgmt->u.beacon.beacon_int =
2958                         cpu_to_le16(local->hw.conf.beacon_int);
2959                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2960
2961                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2962                 *pos++ = WLAN_EID_SSID;
2963                 *pos++ = ifsta->ssid_len;
2964                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2965
2966                 rates = bss->supp_rates_len;
2967                 if (rates > 8)
2968                         rates = 8;
2969                 pos = skb_put(skb, 2 + rates);
2970                 *pos++ = WLAN_EID_SUPP_RATES;
2971                 *pos++ = rates;
2972                 memcpy(pos, bss->supp_rates, rates);
2973
2974                 if (bss->band == IEEE80211_BAND_2GHZ) {
2975                         pos = skb_put(skb, 2 + 1);
2976                         *pos++ = WLAN_EID_DS_PARAMS;
2977                         *pos++ = 1;
2978                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2979                 }
2980
2981                 pos = skb_put(skb, 2 + 2);
2982                 *pos++ = WLAN_EID_IBSS_PARAMS;
2983                 *pos++ = 2;
2984                 /* FIX: set ATIM window based on scan results */
2985                 *pos++ = 0;
2986                 *pos++ = 0;
2987
2988                 if (bss->supp_rates_len > 8) {
2989                         rates = bss->supp_rates_len - 8;
2990                         pos = skb_put(skb, 2 + rates);
2991                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2992                         *pos++ = rates;
2993                         memcpy(pos, &bss->supp_rates[8], rates);
2994                 }
2995
2996                 memset(&control, 0, sizeof(control));
2997                 rate_control_get_rate(dev, sband, skb, &ratesel);
2998                 if (!ratesel.rate) {
2999                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
3000                                "for IBSS beacon\n", dev->name);
3001                         break;
3002                 }
3003                 control.vif = &sdata->vif;
3004                 control.tx_rate = ratesel.rate;
3005                 if (sdata->bss_conf.use_short_preamble &&
3006                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
3007                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
3008                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
3009                 control.flags |= IEEE80211_TXCTL_NO_ACK;
3010                 control.retry_limit = 1;
3011
3012                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
3013                 if (ifsta->probe_resp) {
3014                         mgmt = (struct ieee80211_mgmt *)
3015                                 ifsta->probe_resp->data;
3016                         mgmt->frame_control =
3017                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
3018                                              IEEE80211_STYPE_PROBE_RESP);
3019                 } else {
3020                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
3021                                "template for IBSS\n", dev->name);
3022                 }
3023
3024                 if (local->ops->beacon_update &&
3025                     local->ops->beacon_update(local_to_hw(local),
3026                                              skb, &control) == 0) {
3027                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
3028                                "template based on scan results\n", dev->name);
3029                         skb = NULL;
3030                 }
3031
3032                 rates = 0;
3033                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
3034                 for (i = 0; i < bss->supp_rates_len; i++) {
3035                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
3036                         for (j = 0; j < sband->n_bitrates; j++)
3037                                 if (sband->bitrates[j].bitrate == bitrate)
3038                                         rates |= BIT(j);
3039                 }
3040                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
3041         } while (0);
3042
3043         if (skb) {
3044                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3045                        "template\n", dev->name);
3046                 dev_kfree_skb(skb);
3047         }
3048
3049         ifsta->state = IEEE80211_IBSS_JOINED;
3050         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3051
3052         ieee80211_rx_bss_put(dev, bss);
3053
3054         return res;
3055 }
3056
3057
3058 static int ieee80211_sta_create_ibss(struct net_device *dev,
3059                                      struct ieee80211_if_sta *ifsta)
3060 {
3061         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3062         struct ieee80211_sta_bss *bss;
3063         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3064         struct ieee80211_supported_band *sband;
3065         u8 bssid[ETH_ALEN], *pos;
3066         int i;
3067         DECLARE_MAC_BUF(mac);
3068
3069 #if 0
3070         /* Easier testing, use fixed BSSID. */
3071         memset(bssid, 0xfe, ETH_ALEN);
3072 #else
3073         /* Generate random, not broadcast, locally administered BSSID. Mix in
3074          * own MAC address to make sure that devices that do not have proper
3075          * random number generator get different BSSID. */
3076         get_random_bytes(bssid, ETH_ALEN);
3077         for (i = 0; i < ETH_ALEN; i++)
3078                 bssid[i] ^= dev->dev_addr[i];
3079         bssid[0] &= ~0x01;
3080         bssid[0] |= 0x02;
3081 #endif
3082
3083         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3084                dev->name, print_mac(mac, bssid));
3085
3086         bss = ieee80211_rx_bss_add(dev, bssid,
3087                                    local->hw.conf.channel->center_freq,
3088                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3089         if (!bss)
3090                 return -ENOMEM;
3091
3092         bss->band = local->hw.conf.channel->band;
3093         sband = local->hw.wiphy->bands[bss->band];
3094
3095         if (local->hw.conf.beacon_int == 0)
3096                 local->hw.conf.beacon_int = 100;
3097         bss->beacon_int = local->hw.conf.beacon_int;
3098         bss->last_update = jiffies;
3099         bss->capability = WLAN_CAPABILITY_IBSS;
3100         if (sdata->default_key) {
3101                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3102         } else
3103                 sdata->drop_unencrypted = 0;
3104         bss->supp_rates_len = sband->n_bitrates;
3105         pos = bss->supp_rates;
3106         for (i = 0; i < sband->n_bitrates; i++) {
3107                 int rate = sband->bitrates[i].bitrate;
3108                 *pos++ = (u8) (rate / 5);
3109         }
3110
3111         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3112 }
3113
3114
3115 static int ieee80211_sta_find_ibss(struct net_device *dev,
3116                                    struct ieee80211_if_sta *ifsta)
3117 {
3118         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3119         struct ieee80211_sta_bss *bss;
3120         int found = 0;
3121         u8 bssid[ETH_ALEN];
3122         int active_ibss;
3123         DECLARE_MAC_BUF(mac);
3124         DECLARE_MAC_BUF(mac2);
3125
3126         if (ifsta->ssid_len == 0)
3127                 return -EINVAL;
3128
3129         active_ibss = ieee80211_sta_active_ibss(dev);
3130 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3131         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3132                dev->name, active_ibss);
3133 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3134         spin_lock_bh(&local->sta_bss_lock);
3135         list_for_each_entry(bss, &local->sta_bss_list, list) {
3136                 if (ifsta->ssid_len != bss->ssid_len ||
3137                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3138                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3139                         continue;
3140 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3141                 printk(KERN_DEBUG "   bssid=%s found\n",
3142                        print_mac(mac, bss->bssid));
3143 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3144                 memcpy(bssid, bss->bssid, ETH_ALEN);
3145                 found = 1;
3146                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3147                         break;
3148         }
3149         spin_unlock_bh(&local->sta_bss_lock);
3150
3151 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3152         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3153                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3154 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3155         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3156             (bss = ieee80211_rx_bss_get(dev, bssid,
3157                                         local->hw.conf.channel->center_freq,
3158                                         ifsta->ssid, ifsta->ssid_len))) {
3159                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3160                        " based on configured SSID\n",
3161                        dev->name, print_mac(mac, bssid));
3162                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3163         }
3164 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3165         printk(KERN_DEBUG "   did not try to join ibss\n");
3166 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3167
3168         /* Selected IBSS not found in current scan results - try to scan */
3169         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3170             !ieee80211_sta_active_ibss(dev)) {
3171                 mod_timer(&ifsta->timer, jiffies +
3172                                       IEEE80211_IBSS_MERGE_INTERVAL);
3173         } else if (time_after(jiffies, local->last_scan_completed +
3174                               IEEE80211_SCAN_INTERVAL)) {
3175                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3176                        "join\n", dev->name);
3177                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3178                                               ifsta->ssid_len);
3179         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3180                 int interval = IEEE80211_SCAN_INTERVAL;
3181
3182                 if (time_after(jiffies, ifsta->ibss_join_req +
3183                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3184                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3185                             (!(local->oper_channel->flags &
3186                                         IEEE80211_CHAN_NO_IBSS)))
3187                                 return ieee80211_sta_create_ibss(dev, ifsta);
3188                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3189                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3190                                        " %d MHz\n", dev->name,
3191                                        local->hw.conf.channel->center_freq);
3192                         }
3193
3194                         /* No IBSS found - decrease scan interval and continue
3195                          * scanning. */
3196                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3197                 }
3198
3199                 ifsta->state = IEEE80211_IBSS_SEARCH;
3200                 mod_timer(&ifsta->timer, jiffies + interval);
3201                 return 0;
3202         }
3203
3204         return 0;
3205 }
3206
3207
3208 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3209 {
3210         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3211         struct ieee80211_if_sta *ifsta;
3212         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3213
3214         if (len > IEEE80211_MAX_SSID_LEN)
3215                 return -EINVAL;
3216
3217         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3218          * not defined. */
3219         if (local->ops->conf_tx) {
3220                 struct ieee80211_tx_queue_params qparam;
3221                 int i;
3222
3223                 memset(&qparam, 0, sizeof(qparam));
3224
3225                 qparam.aifs = 2;
3226
3227                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3228                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3229                         qparam.cw_min = 31;
3230                 else
3231                         qparam.cw_min = 15;
3232
3233                 qparam.cw_max = 1023;
3234                 qparam.txop = 0;
3235
3236                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3237                         local->ops->conf_tx(local_to_hw(local),
3238                                            i + IEEE80211_TX_QUEUE_DATA0,
3239                                            &qparam);
3240
3241                 /* IBSS uses different parameters for Beacon sending */
3242                 qparam.cw_min++;
3243                 qparam.cw_min *= 2;
3244                 qparam.cw_min--;
3245                 local->ops->conf_tx(local_to_hw(local),
3246                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
3247         }
3248
3249         ifsta = &sdata->u.sta;
3250
3251         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3252                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3253         memcpy(ifsta->ssid, ssid, len);
3254         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3255         ifsta->ssid_len = len;
3256
3257         if (len)
3258                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3259         else
3260                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3261         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3262             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3263                 ifsta->ibss_join_req = jiffies;
3264                 ifsta->state = IEEE80211_IBSS_SEARCH;
3265                 return ieee80211_sta_find_ibss(dev, ifsta);
3266         }
3267         return 0;
3268 }
3269
3270
3271 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3272 {
3273         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3274         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3275         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3276         *len = ifsta->ssid_len;
3277         return 0;
3278 }
3279
3280
3281 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3282 {
3283         struct ieee80211_sub_if_data *sdata;
3284         struct ieee80211_if_sta *ifsta;
3285         int res;
3286
3287         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3288         ifsta = &sdata->u.sta;
3289
3290         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3291                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3292                 res = ieee80211_if_config(dev);
3293                 if (res) {
3294                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3295                                "the low-level driver\n", dev->name);
3296                         return res;
3297                 }
3298         }
3299
3300         if (is_valid_ether_addr(bssid))
3301                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3302         else
3303                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3304
3305         return 0;
3306 }
3307
3308
3309 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3310                                     struct ieee80211_sub_if_data *sdata,
3311                                     int powersave)
3312 {
3313         struct sk_buff *skb;
3314         struct ieee80211_hdr *nullfunc;
3315         u16 fc;
3316
3317         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3318         if (!skb) {
3319                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3320                        "frame\n", sdata->dev->name);
3321                 return;
3322         }
3323         skb_reserve(skb, local->hw.extra_tx_headroom);
3324
3325         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3326         memset(nullfunc, 0, 24);
3327         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3328              IEEE80211_FCTL_TODS;
3329         if (powersave)
3330                 fc |= IEEE80211_FCTL_PM;
3331         nullfunc->frame_control = cpu_to_le16(fc);
3332         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3333         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3334         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3335
3336         ieee80211_sta_tx(sdata->dev, skb, 0);
3337 }
3338
3339
3340 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3341 {
3342         struct ieee80211_local *local = hw_to_local(hw);
3343         struct net_device *dev = local->scan_dev;
3344         struct ieee80211_sub_if_data *sdata;
3345         union iwreq_data wrqu;
3346
3347         local->last_scan_completed = jiffies;
3348         memset(&wrqu, 0, sizeof(wrqu));
3349         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3350
3351         if (local->sta_hw_scanning) {
3352                 local->sta_hw_scanning = 0;
3353                 goto done;
3354         }
3355
3356         local->sta_sw_scanning = 0;
3357         if (ieee80211_hw_config(local))
3358                 printk(KERN_DEBUG "%s: failed to restore operational "
3359                        "channel after scan\n", dev->name);
3360
3361
3362         netif_tx_lock_bh(local->mdev);
3363         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3364         local->ops->configure_filter(local_to_hw(local),
3365                                      FIF_BCN_PRBRESP_PROMISC,
3366                                      &local->filter_flags,
3367                                      local->mdev->mc_count,
3368                                      local->mdev->mc_list);
3369
3370         netif_tx_unlock_bh(local->mdev);
3371
3372         rcu_read_lock();
3373         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3374
3375                 /* No need to wake the master device. */
3376                 if (sdata->dev == local->mdev)
3377                         continue;
3378
3379                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3380                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3381                                 ieee80211_send_nullfunc(local, sdata, 0);
3382                         ieee80211_sta_timer((unsigned long)sdata);
3383                 }
3384
3385                 netif_wake_queue(sdata->dev);
3386         }
3387         rcu_read_unlock();
3388
3389 done:
3390         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3391         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3392                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3393                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3394                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3395                     !ieee80211_sta_active_ibss(dev)))
3396                         ieee80211_sta_find_ibss(dev, ifsta);
3397         }
3398 }
3399 EXPORT_SYMBOL(ieee80211_scan_completed);
3400
3401 void ieee80211_sta_scan_work(struct work_struct *work)
3402 {
3403         struct ieee80211_local *local =
3404                 container_of(work, struct ieee80211_local, scan_work.work);
3405         struct net_device *dev = local->scan_dev;
3406         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3407         struct ieee80211_supported_band *sband;
3408         struct ieee80211_channel *chan;
3409         int skip;
3410         unsigned long next_delay = 0;
3411
3412         if (!local->sta_sw_scanning)
3413                 return;
3414
3415         switch (local->scan_state) {
3416         case SCAN_SET_CHANNEL:
3417                 /*
3418                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3419                  * after we successfully scanned the last channel of the last
3420                  * band (and the last band is supported by the hw)
3421                  */
3422                 if (local->scan_band < IEEE80211_NUM_BANDS)
3423                         sband = local->hw.wiphy->bands[local->scan_band];
3424                 else
3425                         sband = NULL;
3426
3427                 /*
3428                  * If we are at an unsupported band and have more bands
3429                  * left to scan, advance to the next supported one.
3430                  */
3431                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3432                         local->scan_band++;
3433                         sband = local->hw.wiphy->bands[local->scan_band];
3434                         local->scan_channel_idx = 0;
3435                 }
3436
3437                 /* if no more bands/channels left, complete scan */
3438                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3439                         ieee80211_scan_completed(local_to_hw(local));
3440                         return;
3441                 }
3442                 skip = 0;
3443                 chan = &sband->channels[local->scan_channel_idx];
3444
3445                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3446                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3447                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3448                         skip = 1;
3449
3450                 if (!skip) {
3451                         local->scan_channel = chan;
3452                         if (ieee80211_hw_config(local)) {
3453                                 printk(KERN_DEBUG "%s: failed to set freq to "
3454                                        "%d MHz for scan\n", dev->name,
3455                                        chan->center_freq);
3456                                 skip = 1;
3457                         }
3458                 }
3459
3460                 /* advance state machine to next channel/band */
3461                 local->scan_channel_idx++;
3462                 if (local->scan_channel_idx >= sband->n_channels) {
3463                         /*
3464                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3465                          * we'll catch that case above and complete the scan
3466                          * if that is the case.
3467                          */
3468                         local->scan_band++;
3469                         local->scan_channel_idx = 0;
3470                 }
3471
3472                 if (skip)
3473                         break;
3474
3475                 next_delay = IEEE80211_PROBE_DELAY +
3476                              usecs_to_jiffies(local->hw.channel_change_time);
3477                 local->scan_state = SCAN_SEND_PROBE;
3478                 break;
3479         case SCAN_SEND_PROBE:
3480                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3481                 local->scan_state = SCAN_SET_CHANNEL;
3482
3483                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3484                         break;
3485                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3486                                          local->scan_ssid_len);
3487                 next_delay = IEEE80211_CHANNEL_TIME;
3488                 break;
3489         }
3490
3491         if (local->sta_sw_scanning)
3492                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3493                                    next_delay);
3494 }
3495
3496
3497 static int ieee80211_sta_start_scan(struct net_device *dev,
3498                                     u8 *ssid, size_t ssid_len)
3499 {
3500         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3501         struct ieee80211_sub_if_data *sdata;
3502
3503         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3504                 return -EINVAL;
3505
3506         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3507          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3508          * BSSID: MACAddress
3509          * SSID
3510          * ScanType: ACTIVE, PASSIVE
3511          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3512          *    a Probe frame during active scanning
3513          * ChannelList
3514          * MinChannelTime (>= ProbeDelay), in TU
3515          * MaxChannelTime: (>= MinChannelTime), in TU
3516          */
3517
3518          /* MLME-SCAN.confirm
3519           * BSSDescriptionSet
3520           * ResultCode: SUCCESS, INVALID_PARAMETERS
3521          */
3522
3523         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3524                 if (local->scan_dev == dev)
3525                         return 0;
3526                 return -EBUSY;
3527         }
3528
3529         if (local->ops->hw_scan) {
3530                 int rc = local->ops->hw_scan(local_to_hw(local),
3531                                              ssid, ssid_len);
3532                 if (!rc) {
3533                         local->sta_hw_scanning = 1;
3534                         local->scan_dev = dev;
3535                 }
3536                 return rc;
3537         }
3538
3539         local->sta_sw_scanning = 1;
3540
3541         rcu_read_lock();
3542         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3543
3544                 /* Don't stop the master interface, otherwise we can't transmit
3545                  * probes! */
3546                 if (sdata->dev == local->mdev)
3547                         continue;
3548
3549                 netif_stop_queue(sdata->dev);
3550                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3551                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3552                         ieee80211_send_nullfunc(local, sdata, 1);
3553         }
3554         rcu_read_unlock();
3555
3556         if (ssid) {
3557                 local->scan_ssid_len = ssid_len;
3558                 memcpy(local->scan_ssid, ssid, ssid_len);
3559         } else
3560                 local->scan_ssid_len = 0;
3561         local->scan_state = SCAN_SET_CHANNEL;
3562         local->scan_channel_idx = 0;
3563         local->scan_band = IEEE80211_BAND_2GHZ;
3564         local->scan_dev = dev;
3565
3566         netif_tx_lock_bh(local->mdev);
3567         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3568         local->ops->configure_filter(local_to_hw(local),
3569                                      FIF_BCN_PRBRESP_PROMISC,
3570                                      &local->filter_flags,
3571                                      local->mdev->mc_count,
3572                                      local->mdev->mc_list);
3573         netif_tx_unlock_bh(local->mdev);
3574
3575         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3576         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3577                            IEEE80211_CHANNEL_TIME);
3578
3579         return 0;
3580 }
3581
3582
3583 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3584 {
3585         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3586         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3587         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3588
3589         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3590                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3591
3592         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3593                 if (local->scan_dev == dev)
3594                         return 0;
3595                 return -EBUSY;
3596         }
3597
3598         ifsta->scan_ssid_len = ssid_len;
3599         if (ssid_len)
3600                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3601         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3602         queue_work(local->hw.workqueue, &ifsta->work);
3603         return 0;
3604 }
3605
3606 static char *
3607 ieee80211_sta_scan_result(struct net_device *dev,
3608                           struct ieee80211_sta_bss *bss,
3609                           char *current_ev, char *end_buf)
3610 {
3611         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3612         struct iw_event iwe;
3613
3614         if (time_after(jiffies,
3615                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3616                 return current_ev;
3617
3618         memset(&iwe, 0, sizeof(iwe));
3619         iwe.cmd = SIOCGIWAP;
3620         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3621         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3622         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3623                                           IW_EV_ADDR_LEN);
3624
3625         memset(&iwe, 0, sizeof(iwe));
3626         iwe.cmd = SIOCGIWESSID;
3627         iwe.u.data.length = bss->ssid_len;
3628         iwe.u.data.flags = 1;
3629         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3630                                           bss->ssid);
3631
3632         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3633                 memset(&iwe, 0, sizeof(iwe));
3634                 iwe.cmd = SIOCGIWMODE;
3635                 if (bss->capability & WLAN_CAPABILITY_ESS)
3636                         iwe.u.mode = IW_MODE_MASTER;
3637                 else
3638                         iwe.u.mode = IW_MODE_ADHOC;
3639                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3640                                                   IW_EV_UINT_LEN);
3641         }
3642
3643         memset(&iwe, 0, sizeof(iwe));
3644         iwe.cmd = SIOCGIWFREQ;
3645         iwe.u.freq.m = bss->freq;
3646         iwe.u.freq.e = 6;
3647         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3648                                           IW_EV_FREQ_LEN);
3649
3650         memset(&iwe, 0, sizeof(iwe));
3651         iwe.cmd = SIOCGIWFREQ;
3652         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3653         iwe.u.freq.e = 0;
3654         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3655                                           IW_EV_FREQ_LEN);
3656
3657         memset(&iwe, 0, sizeof(iwe));
3658         iwe.cmd = IWEVQUAL;
3659         iwe.u.qual.qual = bss->signal;
3660         iwe.u.qual.level = bss->rssi;
3661         iwe.u.qual.noise = bss->noise;
3662         iwe.u.qual.updated = local->wstats_flags;
3663         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3664                                           IW_EV_QUAL_LEN);
3665
3666         memset(&iwe, 0, sizeof(iwe));
3667         iwe.cmd = SIOCGIWENCODE;
3668         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3669                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3670         else
3671                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3672         iwe.u.data.length = 0;
3673         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3674
3675         if (bss && bss->wpa_ie) {
3676                 memset(&iwe, 0, sizeof(iwe));
3677                 iwe.cmd = IWEVGENIE;
3678                 iwe.u.data.length = bss->wpa_ie_len;
3679                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3680                                                   bss->wpa_ie);
3681         }
3682
3683         if (bss && bss->rsn_ie) {
3684                 memset(&iwe, 0, sizeof(iwe));
3685                 iwe.cmd = IWEVGENIE;
3686                 iwe.u.data.length = bss->rsn_ie_len;
3687                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3688                                                   bss->rsn_ie);
3689         }
3690
3691         if (bss && bss->supp_rates_len > 0) {
3692                 /* display all supported rates in readable format */
3693                 char *p = current_ev + IW_EV_LCP_LEN;
3694                 int i;
3695
3696                 memset(&iwe, 0, sizeof(iwe));
3697                 iwe.cmd = SIOCGIWRATE;
3698                 /* Those two flags are ignored... */
3699                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3700
3701                 for (i = 0; i < bss->supp_rates_len; i++) {
3702                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3703                                                         0x7f) * 500000);
3704                         p = iwe_stream_add_value(current_ev, p,
3705                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3706                 }
3707                 current_ev = p;
3708         }
3709
3710         if (bss) {
3711                 char *buf;
3712                 buf = kmalloc(30, GFP_ATOMIC);
3713                 if (buf) {
3714                         memset(&iwe, 0, sizeof(iwe));
3715                         iwe.cmd = IWEVCUSTOM;
3716                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3717                         iwe.u.data.length = strlen(buf);
3718                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3719                                                           &iwe, buf);
3720                         kfree(buf);
3721                 }
3722         }
3723
3724         return current_ev;
3725 }
3726
3727
3728 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3729 {
3730         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3731         char *current_ev = buf;
3732         char *end_buf = buf + len;
3733         struct ieee80211_sta_bss *bss;
3734
3735         spin_lock_bh(&local->sta_bss_lock);
3736         list_for_each_entry(bss, &local->sta_bss_list, list) {
3737                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3738                         spin_unlock_bh(&local->sta_bss_lock);
3739                         return -E2BIG;
3740                 }
3741                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3742                                                        end_buf);
3743         }
3744         spin_unlock_bh(&local->sta_bss_lock);
3745         return current_ev - buf;
3746 }
3747
3748
3749 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3750 {
3751         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3752         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3753         kfree(ifsta->extra_ie);
3754         if (len == 0) {
3755                 ifsta->extra_ie = NULL;
3756                 ifsta->extra_ie_len = 0;
3757                 return 0;
3758         }
3759         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3760         if (!ifsta->extra_ie) {
3761                 ifsta->extra_ie_len = 0;
3762                 return -ENOMEM;
3763         }
3764         memcpy(ifsta->extra_ie, ie, len);
3765         ifsta->extra_ie_len = len;
3766         return 0;
3767 }
3768
3769
3770 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3771                                          struct sk_buff *skb, u8 *bssid,
3772                                          u8 *addr)
3773 {
3774         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3775         struct sta_info *sta;
3776         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3777         DECLARE_MAC_BUF(mac);
3778
3779         /* TODO: Could consider removing the least recently used entry and
3780          * allow new one to be added. */
3781         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3782                 if (net_ratelimit()) {
3783                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3784                                "entry %s\n", dev->name, print_mac(mac, addr));
3785                 }
3786                 return NULL;
3787         }
3788
3789         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3790                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3791
3792         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3793         if (!sta)
3794                 return NULL;
3795
3796         sta->flags |= WLAN_STA_AUTHORIZED;
3797
3798         sta->supp_rates[local->hw.conf.channel->band] =
3799                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
3800
3801         rate_control_rate_init(sta, local);
3802
3803         return sta; /* caller will call sta_info_put() */
3804 }
3805
3806
3807 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3808 {
3809         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3810         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3811
3812         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3813                dev->name, reason);
3814
3815         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3816             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3817                 return -EINVAL;
3818
3819         ieee80211_send_deauth(dev, ifsta, reason);
3820         ieee80211_set_disassoc(dev, ifsta, 1);
3821         return 0;
3822 }
3823
3824
3825 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3826 {
3827         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3828         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3829
3830         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3831                dev->name, reason);
3832
3833         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3834                 return -EINVAL;
3835
3836         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3837                 return -1;
3838
3839         ieee80211_send_disassoc(dev, ifsta, reason);
3840         ieee80211_set_disassoc(dev, ifsta, 0);
3841         return 0;
3842 }