git.oblomov.eu Git - 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  * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
  16  * order BSS list by RSSI(?) ("quality of AP")
  17  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  18  *    SSID)
  19  */
  20 #include <linux/delay.h>
  21 #include <linux/if_ether.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/if_arp.h>
  25 #include <linux/wireless.h>
  26 #include <linux/random.h>
  27 #include <linux/etherdevice.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "ieee80211_rate.h"
  34 #include "hostapd_ioctl.h"
  35
  36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  37 #define IEEE80211_AUTH_MAX_TRIES 3
  38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  39 #define IEEE80211_ASSOC_MAX_TRIES 3
  40 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  41 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  42 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  43 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  44 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  45 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  46
  47 #define IEEE80211_PROBE_DELAY (HZ / 33)
  48 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  49 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  50 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  51 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  52 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  53
  54 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  55
  56
  57 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  58
  59 #define ERP_INFO_USE_PROTECTION BIT(1)
  60
  61 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  62                                      u8 *ssid, size_t ssid_len);
  63 static struct ieee80211_sta_bss *
  64 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
  65 static void ieee80211_rx_bss_put(struct net_device *dev,
  66                                  struct ieee80211_sta_bss *bss);
  67 static int ieee80211_sta_find_ibss(struct net_device *dev,
  68                                    struct ieee80211_if_sta *ifsta);
  69 static int ieee80211_sta_wep_configured(struct net_device *dev);
  70 static int ieee80211_sta_start_scan(struct net_device *dev,
  71                                     u8 *ssid, size_t ssid_len);
  72 static int ieee80211_sta_config_auth(struct net_device *dev,
  73                                      struct ieee80211_if_sta *ifsta);
  74
  75
  76 /* Parsed Information Elements */
  77 struct ieee802_11_elems {
  78         /* pointers to IEs */
  79         u8 *ssid;
  80         u8 *supp_rates;
  81         u8 *fh_params;
  82         u8 *ds_params;
  83         u8 *cf_params;
  84         u8 *tim;
  85         u8 *ibss_params;
  86         u8 *challenge;
  87         u8 *wpa;
  88         u8 *rsn;
  89         u8 *erp_info;
  90         u8 *ext_supp_rates;
  91         u8 *wmm_info;
  92         u8 *wmm_param;
  93
  94         /* length of them, respectively */
  95         u8 ssid_len;
  96         u8 supp_rates_len;
  97         u8 fh_params_len;
  98         u8 ds_params_len;
  99         u8 cf_params_len;
 100         u8 tim_len;
 101         u8 ibss_params_len;
 102         u8 challenge_len;
 103         u8 wpa_len;
 104         u8 rsn_len;
 105         u8 erp_info_len;
 106         u8 ext_supp_rates_len;
 107         u8 wmm_info_len;
 108         u8 wmm_param_len;
 109 };
 110
 111 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
 112
 113
 114 static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
 115                                        struct ieee802_11_elems *elems)
 116 {
 117         size_t left = len;
 118         u8 *pos = start;
 119         int unknown = 0;
 120
 121         memset(elems, 0, sizeof(*elems));
 122
 123         while (left >= 2) {
 124                 u8 id, elen;
 125
 126                 id = *pos++;
 127                 elen = *pos++;
 128                 left -= 2;
 129
 130                 if (elen > left) {
 131 #if 0
 132                         if (net_ratelimit())
 133                                 printk(KERN_DEBUG "IEEE 802.11 element parse "
 134                                        "failed (id=%d elen=%d left=%d)\n",
 135                                        id, elen, left);
 136 #endif
 137                         return ParseFailed;
 138                 }
 139
 140                 switch (id) {
 141                 case WLAN_EID_SSID:
 142                         elems->ssid = pos;
 143                         elems->ssid_len = elen;
 144                         break;
 145                 case WLAN_EID_SUPP_RATES:
 146                         elems->supp_rates = pos;
 147                         elems->supp_rates_len = elen;
 148                         break;
 149                 case WLAN_EID_FH_PARAMS:
 150                         elems->fh_params = pos;
 151                         elems->fh_params_len = elen;
 152                         break;
 153                 case WLAN_EID_DS_PARAMS:
 154                         elems->ds_params = pos;
 155                         elems->ds_params_len = elen;
 156                         break;
 157                 case WLAN_EID_CF_PARAMS:
 158                         elems->cf_params = pos;
 159                         elems->cf_params_len = elen;
 160                         break;
 161                 case WLAN_EID_TIM:
 162                         elems->tim = pos;
 163                         elems->tim_len = elen;
 164                         break;
 165                 case WLAN_EID_IBSS_PARAMS:
 166                         elems->ibss_params = pos;
 167                         elems->ibss_params_len = elen;
 168                         break;
 169                 case WLAN_EID_CHALLENGE:
 170                         elems->challenge = pos;
 171                         elems->challenge_len = elen;
 172                         break;
 173                 case WLAN_EID_WPA:
 174                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 175                             pos[2] == 0xf2) {
 176                                 /* Microsoft OUI (00:50:F2) */
 177                                 if (pos[3] == 1) {
 178                                         /* OUI Type 1 - WPA IE */
 179                                         elems->wpa = pos;
 180                                         elems->wpa_len = elen;
 181                                 } else if (elen >= 5 && pos[3] == 2) {
 182                                         if (pos[4] == 0) {
 183                                                 elems->wmm_info = pos;
 184                                                 elems->wmm_info_len = elen;
 185                                         } else if (pos[4] == 1) {
 186                                                 elems->wmm_param = pos;
 187                                                 elems->wmm_param_len = elen;
 188                                         }
 189                                 }
 190                         }
 191                         break;
 192                 case WLAN_EID_RSN:
 193                         elems->rsn = pos;
 194                         elems->rsn_len = elen;
 195                         break;
 196                 case WLAN_EID_ERP_INFO:
 197                         elems->erp_info = pos;
 198                         elems->erp_info_len = elen;
 199                         break;
 200                 case WLAN_EID_EXT_SUPP_RATES:
 201                         elems->ext_supp_rates = pos;
 202                         elems->ext_supp_rates_len = elen;
 203                         break;
 204                 default:
 205 #if 0
 206                         printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
 207                                       "unknown element (id=%d elen=%d)\n",
 208                                       id, elen);
 209 #endif
 210                         unknown++;
 211                         break;
 212                 }
 213
 214                 left -= elen;
 215                 pos += elen;
 216         }
 217
 218         /* Do not trigger error if left == 1 as Apple Airport base stations
 219          * send AssocResps that are one spurious byte too long. */
 220
 221         return unknown ? ParseUnknown : ParseOK;
 222 }
 223
 224
 225
 226
 227 static int ecw2cw(int ecw)
 228 {
 229         int cw = 1;
 230         while (ecw > 0) {
 231                 cw <<= 1;
 232                 ecw--;
 233         }
 234         return cw - 1;
 235 }
 236
 237
 238 static void ieee80211_sta_wmm_params(struct net_device *dev,
 239                                      struct ieee80211_if_sta *ifsta,
 240                                      u8 *wmm_param, size_t wmm_param_len)
 241 {
 242         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 243         struct ieee80211_tx_queue_params params;
 244         size_t left;
 245         int count;
 246         u8 *pos;
 247
 248         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 249                 return;
 250         count = wmm_param[6] & 0x0f;
 251         if (count == ifsta->wmm_last_param_set)
 252                 return;
 253         ifsta->wmm_last_param_set = count;
 254
 255         pos = wmm_param + 8;
 256         left = wmm_param_len - 8;
 257
 258         memset(&params, 0, sizeof(params));
 259
 260         if (!local->ops->conf_tx)
 261                 return;
 262
 263         local->wmm_acm = 0;
 264         for (; left >= 4; left -= 4, pos += 4) {
 265                 int aci = (pos[0] >> 5) & 0x03;
 266                 int acm = (pos[0] >> 4) & 0x01;
 267                 int queue;
 268
 269                 switch (aci) {
 270                 case 1:
 271                         queue = IEEE80211_TX_QUEUE_DATA3;
 272                         if (acm) {
 273                                 local->wmm_acm |= BIT(0) | BIT(3);
 274                         }
 275                         break;
 276                 case 2:
 277                         queue = IEEE80211_TX_QUEUE_DATA1;
 278                         if (acm) {
 279                                 local->wmm_acm |= BIT(4) | BIT(5);
 280                         }
 281                         break;
 282                 case 3:
 283                         queue = IEEE80211_TX_QUEUE_DATA0;
 284                         if (acm) {
 285                                 local->wmm_acm |= BIT(6) | BIT(7);
 286                         }
 287                         break;
 288                 case 0:
 289                 default:
 290                         queue = IEEE80211_TX_QUEUE_DATA2;
 291                         if (acm) {
 292                                 local->wmm_acm |= BIT(1) | BIT(2);
 293                         }
 294                         break;
 295                 }
 296
 297                 params.aifs = pos[0] & 0x0f;
 298                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 299                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 300                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 301                 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 302                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 303                        "cWmin=%d cWmax=%d burst=%d\n",
 304                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 305                        params.cw_max, params.burst_time);
 306                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 307                  * AC for now) */
 308                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 309                         printk(KERN_DEBUG "%s: failed to set TX queue "
 310                                "parameters for queue %d\n", dev->name, queue);
 311                 }
 312         }
 313 }
 314
 315
 316 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
 317 {
 318         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 319         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 320         int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 321
 322         if (use_protection != sdata->use_protection) {
 323                 if (net_ratelimit()) {
 324                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 325                                MAC_FMT ")\n",
 326                                dev->name,
 327                                use_protection ? "enabled" : "disabled",
 328                                MAC_ARG(ifsta->bssid));
 329                 }
 330                 sdata->use_protection = use_protection;
 331         }
 332 }
 333
 334
 335 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 336                                          struct ieee80211_if_sta *ifsta)
 337 {
 338         char *buf;
 339         size_t len;
 340         int i;
 341         union iwreq_data wrqu;
 342
 343         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 344                 return;
 345
 346         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 347                                 ifsta->assocresp_ies_len), GFP_ATOMIC);
 348         if (!buf)
 349                 return;
 350
 351         len = sprintf(buf, "ASSOCINFO(");
 352         if (ifsta->assocreq_ies) {
 353                 len += sprintf(buf + len, "ReqIEs=");
 354                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 355                         len += sprintf(buf + len, "%02x",
 356                                        ifsta->assocreq_ies[i]);
 357                 }
 358         }
 359         if (ifsta->assocresp_ies) {
 360                 if (ifsta->assocreq_ies)
 361                         len += sprintf(buf + len, " ");
 362                 len += sprintf(buf + len, "RespIEs=");
 363                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 364                         len += sprintf(buf + len, "%02x",
 365                                        ifsta->assocresp_ies[i]);
 366                 }
 367         }
 368         len += sprintf(buf + len, ")");
 369
 370         if (len > IW_CUSTOM_MAX) {
 371                 len = sprintf(buf, "ASSOCRESPIE=");
 372                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 373                         len += sprintf(buf + len, "%02x",
 374                                        ifsta->assocresp_ies[i]);
 375                 }
 376         }
 377
 378         memset(&wrqu, 0, sizeof(wrqu));
 379         wrqu.data.length = len;
 380         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 381
 382         kfree(buf);
 383 }
 384
 385
 386 static void ieee80211_set_associated(struct net_device *dev,
 387                                      struct ieee80211_if_sta *ifsta, int assoc)
 388 {
 389         union iwreq_data wrqu;
 390         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 391
 392         if (ifsta->associated == assoc)
 393                 return;
 394
 395         ifsta->associated = assoc;
 396
 397         if (assoc) {
 398                 struct ieee80211_sub_if_data *sdata;
 399                 struct ieee80211_sta_bss *bss;
 400                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 401                 if (sdata->type != IEEE80211_IF_TYPE_STA)
 402                         return;
 403
 404                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
 405                 if (bss) {
 406                         if (bss->has_erp_value)
 407                                 ieee80211_handle_erp_ie(dev, bss->erp_value);
 408                         ieee80211_rx_bss_put(dev, bss);
 409                 }
 410
 411                 netif_carrier_on(dev);
 412                 ifsta->prev_bssid_set = 1;
 413                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 414                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 415                 ieee80211_sta_send_associnfo(dev, ifsta);
 416         } else {
 417                 netif_carrier_off(dev);
 418                 sdata->use_protection = 0;
 419                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 420         }
 421         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 422         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 423         ifsta->last_probe = jiffies;
 424 }
 425
 426 static void ieee80211_set_disassoc(struct net_device *dev,
 427                                    struct ieee80211_if_sta *ifsta, int deauth)
 428 {
 429         if (deauth)
 430                 ifsta->auth_tries = 0;
 431         ifsta->assoc_tries = 0;
 432         ieee80211_set_associated(dev, ifsta, 0);
 433 }
 434
 435 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 436                              int encrypt)
 437 {
 438         struct ieee80211_sub_if_data *sdata;
 439         struct ieee80211_tx_packet_data *pkt_data;
 440
 441         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 442         skb->dev = sdata->local->mdev;
 443         skb_set_mac_header(skb, 0);
 444         skb_set_network_header(skb, 0);
 445         skb_set_transport_header(skb, 0);
 446
 447         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 448         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 449         pkt_data->ifindex = sdata->dev->ifindex;
 450         pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
 451         pkt_data->do_not_encrypt = !encrypt;
 452
 453         dev_queue_xmit(skb);
 454 }
 455
 456
 457 static void ieee80211_send_auth(struct net_device *dev,
 458                                 struct ieee80211_if_sta *ifsta,
 459                                 int transaction, u8 *extra, size_t extra_len,
 460                                 int encrypt)
 461 {
 462         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 463         struct sk_buff *skb;
 464         struct ieee80211_mgmt *mgmt;
 465
 466         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 467                             sizeof(*mgmt) + 6 + extra_len);
 468         if (!skb) {
 469                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 470                        "frame\n", dev->name);
 471                 return;
 472         }
 473         skb_reserve(skb, local->hw.extra_tx_headroom);
 474
 475         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 476         memset(mgmt, 0, 24 + 6);
 477         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 478                                            IEEE80211_STYPE_AUTH);
 479         if (encrypt)
 480                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 481         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 482         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 483         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 484         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 485         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 486         ifsta->auth_transaction = transaction + 1;
 487         mgmt->u.auth.status_code = cpu_to_le16(0);
 488         if (extra)
 489                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 490
 491         ieee80211_sta_tx(dev, skb, encrypt);
 492 }
 493
 494
 495 static void ieee80211_authenticate(struct net_device *dev,
 496                                    struct ieee80211_if_sta *ifsta)
 497 {
 498         ifsta->auth_tries++;
 499         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 500                 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
 501                        " timed out\n",
 502                        dev->name, MAC_ARG(ifsta->bssid));
 503                 ifsta->state = IEEE80211_DISABLED;
 504                 return;
 505         }
 506
 507         ifsta->state = IEEE80211_AUTHENTICATE;
 508         printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
 509                dev->name, MAC_ARG(ifsta->bssid));
 510
 511         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 512
 513         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 514 }
 515
 516
 517 static void ieee80211_send_assoc(struct net_device *dev,
 518                                  struct ieee80211_if_sta *ifsta)
 519 {
 520         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 521         struct ieee80211_hw_mode *mode;
 522         struct sk_buff *skb;
 523         struct ieee80211_mgmt *mgmt;
 524         u8 *pos, *ies;
 525         int i, len;
 526         u16 capab;
 527         struct ieee80211_sta_bss *bss;
 528         int wmm = 0;
 529
 530         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 531                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 532                             ifsta->ssid_len);
 533         if (!skb) {
 534                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 535                        "frame\n", dev->name);
 536                 return;
 537         }
 538         skb_reserve(skb, local->hw.extra_tx_headroom);
 539
 540         mode = local->oper_hw_mode;
 541         capab = ifsta->capab;
 542         if (mode->mode == MODE_IEEE80211G) {
 543                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 544                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 545         }
 546         bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
 547         if (bss) {
 548                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 549                         capab |= WLAN_CAPABILITY_PRIVACY;
 550                 if (bss->wmm_ie) {
 551                         wmm = 1;
 552                 }
 553                 ieee80211_rx_bss_put(dev, bss);
 554         }
 555
 556         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 557         memset(mgmt, 0, 24);
 558         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 559         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 560         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 561
 562         if (ifsta->prev_bssid_set) {
 563                 skb_put(skb, 10);
 564                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 565                                                    IEEE80211_STYPE_REASSOC_REQ);
 566                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 567                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 568                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 569                        ETH_ALEN);
 570         } else {
 571                 skb_put(skb, 4);
 572                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 573                                                    IEEE80211_STYPE_ASSOC_REQ);
 574                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 575                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 576         }
 577
 578         /* SSID */
 579         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 580         *pos++ = WLAN_EID_SSID;
 581         *pos++ = ifsta->ssid_len;
 582         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 583
 584         len = mode->num_rates;
 585         if (len > 8)
 586                 len = 8;
 587         pos = skb_put(skb, len + 2);
 588         *pos++ = WLAN_EID_SUPP_RATES;
 589         *pos++ = len;
 590         for (i = 0; i < len; i++) {
 591                 int rate = mode->rates[i].rate;
 592                 if (mode->mode == MODE_ATHEROS_TURBO)
 593                         rate /= 2;
 594                 *pos++ = (u8) (rate / 5);
 595         }
 596
 597         if (mode->num_rates > len) {
 598                 pos = skb_put(skb, mode->num_rates - len + 2);
 599                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 600                 *pos++ = mode->num_rates - len;
 601                 for (i = len; i < mode->num_rates; i++) {
 602                         int rate = mode->rates[i].rate;
 603                         if (mode->mode == MODE_ATHEROS_TURBO)
 604                                 rate /= 2;
 605                         *pos++ = (u8) (rate / 5);
 606                 }
 607         }
 608
 609         if (ifsta->extra_ie) {
 610                 pos = skb_put(skb, ifsta->extra_ie_len);
 611                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 612         }
 613
 614         if (wmm && ifsta->wmm_enabled) {
 615                 pos = skb_put(skb, 9);
 616                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 617                 *pos++ = 7; /* len */
 618                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 619                 *pos++ = 0x50;
 620                 *pos++ = 0xf2;
 621                 *pos++ = 2; /* WME */
 622                 *pos++ = 0; /* WME info */
 623                 *pos++ = 1; /* WME ver */
 624                 *pos++ = 0;
 625         }
 626
 627         kfree(ifsta->assocreq_ies);
 628         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 629         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
 630         if (ifsta->assocreq_ies)
 631                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 632
 633         ieee80211_sta_tx(dev, skb, 0);
 634 }
 635
 636
 637 static void ieee80211_send_deauth(struct net_device *dev,
 638                                   struct ieee80211_if_sta *ifsta, u16 reason)
 639 {
 640         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 641         struct sk_buff *skb;
 642         struct ieee80211_mgmt *mgmt;
 643
 644         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 645         if (!skb) {
 646                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 647                        "frame\n", dev->name);
 648                 return;
 649         }
 650         skb_reserve(skb, local->hw.extra_tx_headroom);
 651
 652         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 653         memset(mgmt, 0, 24);
 654         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 655         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 656         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 657         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 658                                            IEEE80211_STYPE_DEAUTH);
 659         skb_put(skb, 2);
 660         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 661
 662         ieee80211_sta_tx(dev, skb, 0);
 663 }
 664
 665
 666 static void ieee80211_send_disassoc(struct net_device *dev,
 667                                     struct ieee80211_if_sta *ifsta, u16 reason)
 668 {
 669         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 670         struct sk_buff *skb;
 671         struct ieee80211_mgmt *mgmt;
 672
 673         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 674         if (!skb) {
 675                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 676                        "frame\n", dev->name);
 677                 return;
 678         }
 679         skb_reserve(skb, local->hw.extra_tx_headroom);
 680
 681         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 682         memset(mgmt, 0, 24);
 683         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 684         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 685         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 686         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 687                                            IEEE80211_STYPE_DISASSOC);
 688         skb_put(skb, 2);
 689         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 690
 691         ieee80211_sta_tx(dev, skb, 0);
 692 }
 693
 694
 695 static int ieee80211_privacy_mismatch(struct net_device *dev,
 696                                       struct ieee80211_if_sta *ifsta)
 697 {
 698         struct ieee80211_sta_bss *bss;
 699         int res = 0;
 700
 701         if (!ifsta || ifsta->mixed_cell ||
 702             ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
 703                 return 0;
 704
 705         bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
 706         if (!bss)
 707                 return 0;
 708
 709         if (ieee80211_sta_wep_configured(dev) !=
 710             !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
 711                 res = 1;
 712
 713         ieee80211_rx_bss_put(dev, bss);
 714
 715         return res;
 716 }
 717
 718
 719 static void ieee80211_associate(struct net_device *dev,
 720                                 struct ieee80211_if_sta *ifsta)
 721 {
 722         ifsta->assoc_tries++;
 723         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 724                 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
 725                        " timed out\n",
 726                        dev->name, MAC_ARG(ifsta->bssid));
 727                 ifsta->state = IEEE80211_DISABLED;
 728                 return;
 729         }
 730
 731         ifsta->state = IEEE80211_ASSOCIATE;
 732         printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
 733                dev->name, MAC_ARG(ifsta->bssid));
 734         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 735                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 736                        "mixed-cell disabled - abort association\n", dev->name);
 737                 ifsta->state = IEEE80211_DISABLED;
 738                 return;
 739         }
 740
 741         ieee80211_send_assoc(dev, ifsta);
 742
 743         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 744 }
 745
 746
 747 static void ieee80211_associated(struct net_device *dev,
 748                                  struct ieee80211_if_sta *ifsta)
 749 {
 750         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 751         struct sta_info *sta;
 752         int disassoc;
 753
 754         /* TODO: start monitoring current AP signal quality and number of
 755          * missed beacons. Scan other channels every now and then and search
 756          * for better APs. */
 757         /* TODO: remove expired BSSes */
 758
 759         ifsta->state = IEEE80211_ASSOCIATED;
 760
 761         sta = sta_info_get(local, ifsta->bssid);
 762         if (!sta) {
 763                 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
 764                        dev->name, MAC_ARG(ifsta->bssid));
 765                 disassoc = 1;
 766         } else {
 767                 disassoc = 0;
 768                 if (time_after(jiffies,
 769                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 770                         if (ifsta->probereq_poll) {
 771                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 772                                        "current AP " MAC_FMT " - assume out of "
 773                                        "range\n",
 774                                        dev->name, MAC_ARG(ifsta->bssid));
 775                                 disassoc = 1;
 776                                 sta_info_free(sta, 0);
 777                                 ifsta->probereq_poll = 0;
 778                         } else {
 779                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 780                                                          local->scan_ssid,
 781                                                          local->scan_ssid_len);
 782                                 ifsta->probereq_poll = 1;
 783                         }
 784                 } else {
 785                         ifsta->probereq_poll = 0;
 786                         if (time_after(jiffies, ifsta->last_probe +
 787                                        IEEE80211_PROBE_INTERVAL)) {
 788                                 ifsta->last_probe = jiffies;
 789                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 790                                                          ifsta->ssid,
 791                                                          ifsta->ssid_len);
 792                         }
 793                 }
 794                 sta_info_put(sta);
 795         }
 796         if (disassoc) {
 797                 union iwreq_data wrqu;
 798                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 799                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 800                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 801                 mod_timer(&ifsta->timer, jiffies +
 802                                       IEEE80211_MONITORING_INTERVAL + 30 * HZ);
 803         } else {
 804                 mod_timer(&ifsta->timer, jiffies +
 805                                       IEEE80211_MONITORING_INTERVAL);
 806         }
 807 }
 808
 809
 810 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 811                                      u8 *ssid, size_t ssid_len)
 812 {
 813         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 814         struct ieee80211_hw_mode *mode;
 815         struct sk_buff *skb;
 816         struct ieee80211_mgmt *mgmt;
 817         u8 *pos, *supp_rates, *esupp_rates = NULL;
 818         int i;
 819
 820         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 821         if (!skb) {
 822                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 823                        "request\n", dev->name);
 824                 return;
 825         }
 826         skb_reserve(skb, local->hw.extra_tx_headroom);
 827
 828         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 829         memset(mgmt, 0, 24);
 830         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 831                                            IEEE80211_STYPE_PROBE_REQ);
 832         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 833         if (dst) {
 834                 memcpy(mgmt->da, dst, ETH_ALEN);
 835                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 836         } else {
 837                 memset(mgmt->da, 0xff, ETH_ALEN);
 838                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 839         }
 840         pos = skb_put(skb, 2 + ssid_len);
 841         *pos++ = WLAN_EID_SSID;
 842         *pos++ = ssid_len;
 843         memcpy(pos, ssid, ssid_len);
 844
 845         supp_rates = skb_put(skb, 2);
 846         supp_rates[0] = WLAN_EID_SUPP_RATES;
 847         supp_rates[1] = 0;
 848         mode = local->oper_hw_mode;
 849         for (i = 0; i < mode->num_rates; i++) {
 850                 struct ieee80211_rate *rate = &mode->rates[i];
 851                 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
 852                         continue;
 853                 if (esupp_rates) {
 854                         pos = skb_put(skb, 1);
 855                         esupp_rates[1]++;
 856                 } else if (supp_rates[1] == 8) {
 857                         esupp_rates = skb_put(skb, 3);
 858                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 859                         esupp_rates[1] = 1;
 860                         pos = &esupp_rates[2];
 861                 } else {
 862                         pos = skb_put(skb, 1);
 863                         supp_rates[1]++;
 864                 }
 865                 if (mode->mode == MODE_ATHEROS_TURBO)
 866                         *pos = rate->rate / 10;
 867                 else
 868                         *pos = rate->rate / 5;
 869         }
 870
 871         ieee80211_sta_tx(dev, skb, 0);
 872 }
 873
 874
 875 static int ieee80211_sta_wep_configured(struct net_device *dev)
 876 {
 877         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 878         if (!sdata || !sdata->default_key ||
 879             sdata->default_key->alg != ALG_WEP)
 880                 return 0;
 881         return 1;
 882 }
 883
 884
 885 static void ieee80211_auth_completed(struct net_device *dev,
 886                                      struct ieee80211_if_sta *ifsta)
 887 {
 888         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 889         ifsta->authenticated = 1;
 890         ieee80211_associate(dev, ifsta);
 891 }
 892
 893
 894 static void ieee80211_auth_challenge(struct net_device *dev,
 895                                      struct ieee80211_if_sta *ifsta,
 896                                      struct ieee80211_mgmt *mgmt,
 897                                      size_t len)
 898 {
 899         u8 *pos;
 900         struct ieee802_11_elems elems;
 901
 902         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 903         pos = mgmt->u.auth.variable;
 904         if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
 905             == ParseFailed) {
 906                 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
 907                        dev->name);
 908                 return;
 909         }
 910         if (!elems.challenge) {
 911                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 912                        "frame\n", dev->name);
 913                 return;
 914         }
 915         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 916                             elems.challenge_len + 2, 1);
 917 }
 918
 919
 920 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
 921                                    struct ieee80211_if_sta *ifsta,
 922                                    struct ieee80211_mgmt *mgmt,
 923                                    size_t len)
 924 {
 925         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 926         u16 auth_alg, auth_transaction, status_code;
 927
 928         if (ifsta->state != IEEE80211_AUTHENTICATE &&
 929             sdata->type != IEEE80211_IF_TYPE_IBSS) {
 930                 printk(KERN_DEBUG "%s: authentication frame received from "
 931                        MAC_FMT ", but not in authenticate state - ignored\n",
 932                        dev->name, MAC_ARG(mgmt->sa));
 933                 return;
 934         }
 935
 936         if (len < 24 + 6) {
 937                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
 938                        "received from " MAC_FMT " - ignored\n",
 939                        dev->name, len, MAC_ARG(mgmt->sa));
 940                 return;
 941         }
 942
 943         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
 944             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
 945                 printk(KERN_DEBUG "%s: authentication frame received from "
 946                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
 947                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
 948                        MAC_ARG(mgmt->bssid));
 949                 return;
 950         }
 951
 952         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
 953             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
 954                 printk(KERN_DEBUG "%s: authentication frame received from "
 955                        "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
 956                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
 957                        MAC_ARG(mgmt->bssid));
 958                 return;
 959         }
 960
 961         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
 962         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
 963         status_code = le16_to_cpu(mgmt->u.auth.status_code);
 964
 965         printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
 966                "transaction=%d status=%d)\n",
 967                dev->name, MAC_ARG(mgmt->sa), auth_alg,
 968                auth_transaction, status_code);
 969
 970         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
 971                 /* IEEE 802.11 standard does not require authentication in IBSS
 972                  * networks and most implementations do not seem to use it.
 973                  * However, try to reply to authentication attempts if someone
 974                  * has actually implemented this.
 975                  * TODO: Could implement shared key authentication. */
 976                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
 977                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
 978                                "frame (alg=%d transaction=%d)\n",
 979                                dev->name, auth_alg, auth_transaction);
 980                         return;
 981                 }
 982                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
 983         }
 984
 985         if (auth_alg != ifsta->auth_alg ||
 986             auth_transaction != ifsta->auth_transaction) {
 987                 printk(KERN_DEBUG "%s: unexpected authentication frame "
 988                        "(alg=%d transaction=%d)\n",
 989                        dev->name, auth_alg, auth_transaction);
 990                 return;
 991         }
 992
 993         if (status_code != WLAN_STATUS_SUCCESS) {
 994                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
 995                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
 996                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
 997                         u8 algs[3];
 998                         const int num_algs = ARRAY_SIZE(algs);
 999                         int i, pos;
1000                         algs[0] = algs[1] = algs[2] = 0xff;
1001                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1002                                 algs[0] = WLAN_AUTH_OPEN;
1003                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1004                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1005                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1006                                 algs[2] = WLAN_AUTH_LEAP;
1007                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1008                                 pos = 0;
1009                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1010                                 pos = 1;
1011                         else
1012                                 pos = 2;
1013                         for (i = 0; i < num_algs; i++) {
1014                                 pos++;
1015                                 if (pos >= num_algs)
1016                                         pos = 0;
1017                                 if (algs[pos] == ifsta->auth_alg ||
1018                                     algs[pos] == 0xff)
1019                                         continue;
1020                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1021                                     !ieee80211_sta_wep_configured(dev))
1022                                         continue;
1023                                 ifsta->auth_alg = algs[pos];
1024                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1025                                        "next try\n",
1026                                        dev->name, ifsta->auth_alg);
1027                                 break;
1028                         }
1029                 }
1030                 return;
1031         }
1032
1033         switch (ifsta->auth_alg) {
1034         case WLAN_AUTH_OPEN:
1035         case WLAN_AUTH_LEAP:
1036                 ieee80211_auth_completed(dev, ifsta);
1037                 break;
1038         case WLAN_AUTH_SHARED_KEY:
1039                 if (ifsta->auth_transaction == 4)
1040                         ieee80211_auth_completed(dev, ifsta);
1041                 else
1042                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1043                 break;
1044         }
1045 }
1046
1047
1048 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1049                                      struct ieee80211_if_sta *ifsta,
1050                                      struct ieee80211_mgmt *mgmt,
1051                                      size_t len)
1052 {
1053         u16 reason_code;
1054
1055         if (len < 24 + 2) {
1056                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1057                        "received from " MAC_FMT " - ignored\n",
1058                        dev->name, len, MAC_ARG(mgmt->sa));
1059                 return;
1060         }
1061
1062         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1063                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1064                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1065                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1066                        MAC_ARG(mgmt->bssid));
1067                 return;
1068         }
1069
1070         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1071
1072         printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1073                " (reason=%d)\n",
1074                dev->name, MAC_ARG(mgmt->sa), reason_code);
1075
1076         if (ifsta->authenticated) {
1077                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1078         }
1079
1080         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1081             ifsta->state == IEEE80211_ASSOCIATE ||
1082             ifsta->state == IEEE80211_ASSOCIATED) {
1083                 ifsta->state = IEEE80211_AUTHENTICATE;
1084                 mod_timer(&ifsta->timer, jiffies +
1085                                       IEEE80211_RETRY_AUTH_INTERVAL);
1086         }
1087
1088         ieee80211_set_disassoc(dev, ifsta, 1);
1089         ifsta->authenticated = 0;
1090 }
1091
1092
1093 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1094                                        struct ieee80211_if_sta *ifsta,
1095                                        struct ieee80211_mgmt *mgmt,
1096                                        size_t len)
1097 {
1098         u16 reason_code;
1099
1100         if (len < 24 + 2) {
1101                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1102                        "received from " MAC_FMT " - ignored\n",
1103                        dev->name, len, MAC_ARG(mgmt->sa));
1104                 return;
1105         }
1106
1107         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1108                 printk(KERN_DEBUG "%s: disassociation frame received from "
1109                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1110                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1111                        MAC_ARG(mgmt->bssid));
1112                 return;
1113         }
1114
1115         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1116
1117         printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1118                " (reason=%d)\n",
1119                dev->name, MAC_ARG(mgmt->sa), reason_code);
1120
1121         if (ifsta->associated)
1122                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1123
1124         if (ifsta->state == IEEE80211_ASSOCIATED) {
1125                 ifsta->state = IEEE80211_ASSOCIATE;
1126                 mod_timer(&ifsta->timer, jiffies +
1127                                       IEEE80211_RETRY_AUTH_INTERVAL);
1128         }
1129
1130         ieee80211_set_disassoc(dev, ifsta, 0);
1131 }
1132
1133
1134 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1135                                          struct ieee80211_if_sta *ifsta,
1136                                          struct ieee80211_mgmt *mgmt,
1137                                          size_t len,
1138                                          int reassoc)
1139 {
1140         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1141         struct ieee80211_hw_mode *mode;
1142         struct sta_info *sta;
1143         u32 rates;
1144         u16 capab_info, status_code, aid;
1145         struct ieee802_11_elems elems;
1146         u8 *pos;
1147         int i, j;
1148
1149         /* AssocResp and ReassocResp have identical structure, so process both
1150          * of them in this function. */
1151
1152         if (ifsta->state != IEEE80211_ASSOCIATE) {
1153                 printk(KERN_DEBUG "%s: association frame received from "
1154                        MAC_FMT ", but not in associate state - ignored\n",
1155                        dev->name, MAC_ARG(mgmt->sa));
1156                 return;
1157         }
1158
1159         if (len < 24 + 6) {
1160                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1161                        "received from " MAC_FMT " - ignored\n",
1162                        dev->name, len, MAC_ARG(mgmt->sa));
1163                 return;
1164         }
1165
1166         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1167                 printk(KERN_DEBUG "%s: association frame received from "
1168                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1169                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1170                        MAC_ARG(mgmt->bssid));
1171                 return;
1172         }
1173
1174         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1175         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1176         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1177         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1178                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1179                        "set\n", dev->name, aid);
1180         aid &= ~(BIT(15) | BIT(14));
1181
1182         printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1183                "status=%d aid=%d)\n",
1184                dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1185                capab_info, status_code, aid);
1186
1187         if (status_code != WLAN_STATUS_SUCCESS) {
1188                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1189                        dev->name, status_code);
1190                 if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
1191                         ifsta->prev_bssid_set = 0;
1192                 return;
1193         }
1194
1195         pos = mgmt->u.assoc_resp.variable;
1196         if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1197             == ParseFailed) {
1198                 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1199                        dev->name);
1200                 return;
1201         }
1202
1203         if (!elems.supp_rates) {
1204                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1205                        dev->name);
1206                 return;
1207         }
1208
1209         /* it probably doesn't, but if the frame includes an ERP value then
1210          * update our stored copy */
1211         if (elems.erp_info && elems.erp_info_len >= 1) {
1212                 struct ieee80211_sta_bss *bss
1213                         = ieee80211_rx_bss_get(dev, ifsta->bssid);
1214                 if (bss) {
1215                         bss->erp_value = elems.erp_info[0];
1216                         bss->has_erp_value = 1;
1217                         ieee80211_rx_bss_put(dev, bss);
1218                 }
1219         }
1220
1221         printk(KERN_DEBUG "%s: associated\n", dev->name);
1222         ifsta->aid = aid;
1223         ifsta->ap_capab = capab_info;
1224
1225         kfree(ifsta->assocresp_ies);
1226         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1227         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1228         if (ifsta->assocresp_ies)
1229                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1230
1231         ieee80211_set_associated(dev, ifsta, 1);
1232
1233         /* Add STA entry for the AP */
1234         sta = sta_info_get(local, ifsta->bssid);
1235         if (!sta) {
1236                 struct ieee80211_sta_bss *bss;
1237                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1238                 if (!sta) {
1239                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1240                                " AP\n", dev->name);
1241                         return;
1242                 }
1243                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1244                 if (bss) {
1245                         sta->last_rssi = bss->rssi;
1246                         sta->last_signal = bss->signal;
1247                         sta->last_noise = bss->noise;
1248                         ieee80211_rx_bss_put(dev, bss);
1249                 }
1250         }
1251
1252         sta->dev = dev;
1253         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1254         sta->assoc_ap = 1;
1255
1256         rates = 0;
1257         mode = local->oper_hw_mode;
1258         for (i = 0; i < elems.supp_rates_len; i++) {
1259                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1260                 if (mode->mode == MODE_ATHEROS_TURBO)
1261                         rate *= 2;
1262                 for (j = 0; j < mode->num_rates; j++)
1263                         if (mode->rates[j].rate == rate)
1264                                 rates |= BIT(j);
1265         }
1266         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1267                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1268                 if (mode->mode == MODE_ATHEROS_TURBO)
1269                         rate *= 2;
1270                 for (j = 0; j < mode->num_rates; j++)
1271                         if (mode->rates[j].rate == rate)
1272                                 rates |= BIT(j);
1273         }
1274         sta->supp_rates = rates;
1275
1276         rate_control_rate_init(sta, local);
1277
1278         if (elems.wmm_param && ifsta->wmm_enabled) {
1279                 sta->flags |= WLAN_STA_WME;
1280                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1281                                          elems.wmm_param_len);
1282         }
1283
1284
1285         sta_info_put(sta);
1286
1287         ieee80211_associated(dev, ifsta);
1288 }
1289
1290
1291 /* Caller must hold local->sta_bss_lock */
1292 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1293                                         struct ieee80211_sta_bss *bss)
1294 {
1295         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1296         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1297         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1298 }
1299
1300
1301 /* Caller must hold local->sta_bss_lock */
1302 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1303                                         struct ieee80211_sta_bss *bss)
1304 {
1305         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1306         struct ieee80211_sta_bss *b, *prev = NULL;
1307         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1308         while (b) {
1309                 if (b == bss) {
1310                         if (!prev)
1311                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1312                                         bss->hnext;
1313                         else
1314                                 prev->hnext = bss->hnext;
1315                         break;
1316                 }
1317                 prev = b;
1318                 b = b->hnext;
1319         }
1320 }
1321
1322
1323 static struct ieee80211_sta_bss *
1324 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1325 {
1326         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1327         struct ieee80211_sta_bss *bss;
1328
1329         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1330         if (!bss)
1331                 return NULL;
1332         atomic_inc(&bss->users);
1333         atomic_inc(&bss->users);
1334         memcpy(bss->bssid, bssid, ETH_ALEN);
1335
1336         spin_lock_bh(&local->sta_bss_lock);
1337         /* TODO: order by RSSI? */
1338         list_add_tail(&bss->list, &local->sta_bss_list);
1339         __ieee80211_rx_bss_hash_add(dev, bss);
1340         spin_unlock_bh(&local->sta_bss_lock);
1341         return bss;
1342 }
1343
1344
1345 static struct ieee80211_sta_bss *
1346 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1347 {
1348         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1349         struct ieee80211_sta_bss *bss;
1350
1351         spin_lock_bh(&local->sta_bss_lock);
1352         bss = local->sta_bss_hash[STA_HASH(bssid)];
1353         while (bss) {
1354                 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1355                         atomic_inc(&bss->users);
1356                         break;
1357                 }
1358                 bss = bss->hnext;
1359         }
1360         spin_unlock_bh(&local->sta_bss_lock);
1361         return bss;
1362 }
1363
1364
1365 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1366 {
1367         kfree(bss->wpa_ie);
1368         kfree(bss->rsn_ie);
1369         kfree(bss->wmm_ie);
1370         kfree(bss);
1371 }
1372
1373
1374 static void ieee80211_rx_bss_put(struct net_device *dev,
1375                                  struct ieee80211_sta_bss *bss)
1376 {
1377         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1378         if (!atomic_dec_and_test(&bss->users))
1379                 return;
1380
1381         spin_lock_bh(&local->sta_bss_lock);
1382         __ieee80211_rx_bss_hash_del(dev, bss);
1383         list_del(&bss->list);
1384         spin_unlock_bh(&local->sta_bss_lock);
1385         ieee80211_rx_bss_free(bss);
1386 }
1387
1388
1389 void ieee80211_rx_bss_list_init(struct net_device *dev)
1390 {
1391         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1392         spin_lock_init(&local->sta_bss_lock);
1393         INIT_LIST_HEAD(&local->sta_bss_list);
1394 }
1395
1396
1397 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1398 {
1399         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1400         struct ieee80211_sta_bss *bss, *tmp;
1401
1402         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1403                 ieee80211_rx_bss_put(dev, bss);
1404 }
1405
1406
1407 static void ieee80211_rx_bss_info(struct net_device *dev,
1408                                   struct ieee80211_mgmt *mgmt,
1409                                   size_t len,
1410                                   struct ieee80211_rx_status *rx_status,
1411                                   int beacon)
1412 {
1413         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1414         struct ieee802_11_elems elems;
1415         size_t baselen;
1416         int channel, invalid = 0, clen;
1417         struct ieee80211_sta_bss *bss;
1418         struct sta_info *sta;
1419         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1420         u64 timestamp;
1421
1422         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1423                 return; /* ignore ProbeResp to foreign address */
1424
1425 #if 0
1426         printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1427                dev->name, beacon ? "Beacon" : "Probe Response",
1428                MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1429 #endif
1430
1431         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1432         if (baselen > len)
1433                 return;
1434
1435         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1436
1437         if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1438             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1439 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1440                 static unsigned long last_tsf_debug = 0;
1441                 u64 tsf;
1442                 if (local->ops->get_tsf)
1443                         tsf = local->ops->get_tsf(local_to_hw(local));
1444                 else
1445                         tsf = -1LLU;
1446                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1447                         printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1448                                MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1449                                "@%lu\n",
1450                                MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1451                                (unsigned long long)tsf,
1452                                (unsigned long long)timestamp,
1453                                (unsigned long long)(tsf - timestamp),
1454                                jiffies);
1455                         last_tsf_debug = jiffies;
1456                 }
1457 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1458         }
1459
1460         if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1461                                    &elems) == ParseFailed)
1462                 invalid = 1;
1463
1464         if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1465             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1466             (sta = sta_info_get(local, mgmt->sa))) {
1467                 struct ieee80211_hw_mode *mode;
1468                 struct ieee80211_rate *rates;
1469                 size_t num_rates;
1470                 u32 supp_rates, prev_rates;
1471                 int i, j;
1472
1473                 mode = local->sta_scanning ?
1474                        local->scan_hw_mode : local->oper_hw_mode;
1475                 rates = mode->rates;
1476                 num_rates = mode->num_rates;
1477
1478                 supp_rates = 0;
1479                 for (i = 0; i < elems.supp_rates_len +
1480                              elems.ext_supp_rates_len; i++) {
1481                         u8 rate = 0;
1482                         int own_rate;
1483                         if (i < elems.supp_rates_len)
1484                                 rate = elems.supp_rates[i];
1485                         else if (elems.ext_supp_rates)
1486                                 rate = elems.ext_supp_rates
1487                                         [i - elems.supp_rates_len];
1488                         own_rate = 5 * (rate & 0x7f);
1489                         if (mode->mode == MODE_ATHEROS_TURBO)
1490                                 own_rate *= 2;
1491                         for (j = 0; j < num_rates; j++)
1492                                 if (rates[j].rate == own_rate)
1493                                         supp_rates |= BIT(j);
1494                 }
1495
1496                 prev_rates = sta->supp_rates;
1497                 sta->supp_rates &= supp_rates;
1498                 if (sta->supp_rates == 0) {
1499                         /* No matching rates - this should not really happen.
1500                          * Make sure that at least one rate is marked
1501                          * supported to avoid issues with TX rate ctrl. */
1502                         sta->supp_rates = sdata->u.sta.supp_rates_bits;
1503                 }
1504                 if (sta->supp_rates != prev_rates) {
1505                         printk(KERN_DEBUG "%s: updated supp_rates set for "
1506                                MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1507                                "0x%x)\n",
1508                                dev->name, MAC_ARG(sta->addr), prev_rates,
1509                                supp_rates, sta->supp_rates);
1510                 }
1511                 sta_info_put(sta);
1512         }
1513
1514         if (!elems.ssid)
1515                 return;
1516
1517         if (elems.ds_params && elems.ds_params_len == 1)
1518                 channel = elems.ds_params[0];
1519         else
1520                 channel = rx_status->channel;
1521
1522         bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1523         if (!bss) {
1524                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1525                 if (!bss)
1526                         return;
1527         } else {
1528 #if 0
1529                 /* TODO: order by RSSI? */
1530                 spin_lock_bh(&local->sta_bss_lock);
1531                 list_move_tail(&bss->list, &local->sta_bss_list);
1532                 spin_unlock_bh(&local->sta_bss_lock);
1533 #endif
1534         }
1535
1536         if (bss->probe_resp && beacon) {
1537                 /* Do not allow beacon to override data from Probe Response. */
1538                 ieee80211_rx_bss_put(dev, bss);
1539                 return;
1540         }
1541
1542         /* save the ERP value so that it is available at association time */
1543         if (elems.erp_info && elems.erp_info_len >= 1) {
1544                 bss->erp_value = elems.erp_info[0];
1545                 bss->has_erp_value = 1;
1546         }
1547
1548         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1549         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1550         if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1551                 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1552                 bss->ssid_len = elems.ssid_len;
1553         }
1554
1555         bss->supp_rates_len = 0;
1556         if (elems.supp_rates) {
1557                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1558                 if (clen > elems.supp_rates_len)
1559                         clen = elems.supp_rates_len;
1560                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1561                        clen);
1562                 bss->supp_rates_len += clen;
1563         }
1564         if (elems.ext_supp_rates) {
1565                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1566                 if (clen > elems.ext_supp_rates_len)
1567                         clen = elems.ext_supp_rates_len;
1568                 memcpy(&bss->supp_rates[bss->supp_rates_len],
1569                        elems.ext_supp_rates, clen);
1570                 bss->supp_rates_len += clen;
1571         }
1572
1573         if (elems.wpa &&
1574             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1575              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1576                 kfree(bss->wpa_ie);
1577                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1578                 if (bss->wpa_ie) {
1579                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1580                         bss->wpa_ie_len = elems.wpa_len + 2;
1581                 } else
1582                         bss->wpa_ie_len = 0;
1583         } else if (!elems.wpa && bss->wpa_ie) {
1584                 kfree(bss->wpa_ie);
1585                 bss->wpa_ie = NULL;
1586                 bss->wpa_ie_len = 0;
1587         }
1588
1589         if (elems.rsn &&
1590             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1591              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1592                 kfree(bss->rsn_ie);
1593                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1594                 if (bss->rsn_ie) {
1595                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1596                         bss->rsn_ie_len = elems.rsn_len + 2;
1597                 } else
1598                         bss->rsn_ie_len = 0;
1599         } else if (!elems.rsn && bss->rsn_ie) {
1600                 kfree(bss->rsn_ie);
1601                 bss->rsn_ie = NULL;
1602                 bss->rsn_ie_len = 0;
1603         }
1604
1605         if (elems.wmm_param &&
1606             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1607              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1608                 kfree(bss->wmm_ie);
1609                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1610                 if (bss->wmm_ie) {
1611                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
1612                                elems.wmm_param_len + 2);
1613                         bss->wmm_ie_len = elems.wmm_param_len + 2;
1614                 } else
1615                         bss->wmm_ie_len = 0;
1616         } else if (!elems.wmm_param && bss->wmm_ie) {
1617                 kfree(bss->wmm_ie);
1618                 bss->wmm_ie = NULL;
1619                 bss->wmm_ie_len = 0;
1620         }
1621
1622
1623         bss->hw_mode = rx_status->phymode;
1624         bss->channel = channel;
1625         bss->freq = rx_status->freq;
1626         if (channel != rx_status->channel &&
1627             (bss->hw_mode == MODE_IEEE80211G ||
1628              bss->hw_mode == MODE_IEEE80211B) &&
1629             channel >= 1 && channel <= 14) {
1630                 static const int freq_list[] = {
1631                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
1632                         2447, 2452, 2457, 2462, 2467, 2472, 2484
1633                 };
1634                 /* IEEE 802.11g/b mode can receive packets from neighboring
1635                  * channels, so map the channel into frequency. */
1636                 bss->freq = freq_list[channel - 1];
1637         }
1638         bss->timestamp = timestamp;
1639         bss->last_update = jiffies;
1640         bss->rssi = rx_status->ssi;
1641         bss->signal = rx_status->signal;
1642         bss->noise = rx_status->noise;
1643         if (!beacon)
1644                 bss->probe_resp++;
1645         ieee80211_rx_bss_put(dev, bss);
1646 }
1647
1648
1649 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1650                                          struct ieee80211_mgmt *mgmt,
1651                                          size_t len,
1652                                          struct ieee80211_rx_status *rx_status)
1653 {
1654         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1655 }
1656
1657
1658 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1659                                      struct ieee80211_mgmt *mgmt,
1660                                      size_t len,
1661                                      struct ieee80211_rx_status *rx_status)
1662 {
1663         struct ieee80211_sub_if_data *sdata;
1664         struct ieee80211_if_sta *ifsta;
1665         size_t baselen;
1666         struct ieee802_11_elems elems;
1667
1668         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1669
1670         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1671         if (sdata->type != IEEE80211_IF_TYPE_STA)
1672                 return;
1673         ifsta = &sdata->u.sta;
1674
1675         if (!ifsta->associated ||
1676             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1677                 return;
1678
1679         /* Process beacon from the current BSS */
1680         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1681         if (baselen > len)
1682                 return;
1683
1684         if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1685                                    &elems) == ParseFailed)
1686                 return;
1687
1688         if (elems.erp_info && elems.erp_info_len >= 1)
1689                 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1690
1691         if (elems.wmm_param && ifsta->wmm_enabled) {
1692                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1693                                          elems.wmm_param_len);
1694         }
1695 }
1696
1697
1698 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1699                                         struct ieee80211_if_sta *ifsta,
1700                                         struct ieee80211_mgmt *mgmt,
1701                                         size_t len,
1702                                         struct ieee80211_rx_status *rx_status)
1703 {
1704         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1705         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1706         int tx_last_beacon;
1707         struct sk_buff *skb;
1708         struct ieee80211_mgmt *resp;
1709         u8 *pos, *end;
1710
1711         if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1712             ifsta->state != IEEE80211_IBSS_JOINED ||
1713             len < 24 + 2 || !ifsta->probe_resp)
1714                 return;
1715
1716         if (local->ops->tx_last_beacon)
1717                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1718         else
1719                 tx_last_beacon = 1;
1720
1721 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1722         printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1723                MAC_FMT " (tx_last_beacon=%d)\n",
1724                dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1725                MAC_ARG(mgmt->bssid), tx_last_beacon);
1726 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1727
1728         if (!tx_last_beacon)
1729                 return;
1730
1731         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1732             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1733                 return;
1734
1735         end = ((u8 *) mgmt) + len;
1736         pos = mgmt->u.probe_req.variable;
1737         if (pos[0] != WLAN_EID_SSID ||
1738             pos + 2 + pos[1] > end) {
1739                 if (net_ratelimit()) {
1740                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1741                                "from " MAC_FMT "\n",
1742                                dev->name, MAC_ARG(mgmt->sa));
1743                 }
1744                 return;
1745         }
1746         if (pos[1] != 0 &&
1747             (pos[1] != ifsta->ssid_len ||
1748              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1749                 /* Ignore ProbeReq for foreign SSID */
1750                 return;
1751         }
1752
1753         /* Reply with ProbeResp */
1754         skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1755         if (!skb)
1756                 return;
1757
1758         resp = (struct ieee80211_mgmt *) skb->data;
1759         memcpy(resp->da, mgmt->sa, ETH_ALEN);
1760 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1761         printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1762                dev->name, MAC_ARG(resp->da));
1763 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1764         ieee80211_sta_tx(dev, skb, 0);
1765 }
1766
1767
1768 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1769                            struct ieee80211_rx_status *rx_status)
1770 {
1771         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1772         struct ieee80211_sub_if_data *sdata;
1773         struct ieee80211_if_sta *ifsta;
1774         struct ieee80211_mgmt *mgmt;
1775         u16 fc;
1776
1777         if (skb->len < 24)
1778                 goto fail;
1779
1780         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1781         ifsta = &sdata->u.sta;
1782
1783         mgmt = (struct ieee80211_mgmt *) skb->data;
1784         fc = le16_to_cpu(mgmt->frame_control);
1785
1786         switch (fc & IEEE80211_FCTL_STYPE) {
1787         case IEEE80211_STYPE_PROBE_REQ:
1788         case IEEE80211_STYPE_PROBE_RESP:
1789         case IEEE80211_STYPE_BEACON:
1790                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1791         case IEEE80211_STYPE_AUTH:
1792         case IEEE80211_STYPE_ASSOC_RESP:
1793         case IEEE80211_STYPE_REASSOC_RESP:
1794         case IEEE80211_STYPE_DEAUTH:
1795         case IEEE80211_STYPE_DISASSOC:
1796                 skb_queue_tail(&ifsta->skb_queue, skb);
1797                 queue_work(local->hw.workqueue, &ifsta->work);
1798                 return;
1799         default:
1800                 printk(KERN_DEBUG "%s: received unknown management frame - "
1801                        "stype=%d\n", dev->name,
1802                        (fc & IEEE80211_FCTL_STYPE) >> 4);
1803                 break;
1804         }
1805
1806  fail:
1807         kfree_skb(skb);
1808 }
1809
1810
1811 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1812                                          struct sk_buff *skb)
1813 {
1814         struct ieee80211_rx_status *rx_status;
1815         struct ieee80211_sub_if_data *sdata;
1816         struct ieee80211_if_sta *ifsta;
1817         struct ieee80211_mgmt *mgmt;
1818         u16 fc;
1819
1820         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1821         ifsta = &sdata->u.sta;
1822
1823         rx_status = (struct ieee80211_rx_status *) skb->cb;
1824         mgmt = (struct ieee80211_mgmt *) skb->data;
1825         fc = le16_to_cpu(mgmt->frame_control);
1826
1827         switch (fc & IEEE80211_FCTL_STYPE) {
1828         case IEEE80211_STYPE_PROBE_REQ:
1829                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1830                                             rx_status);
1831                 break;
1832         case IEEE80211_STYPE_PROBE_RESP:
1833                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1834                 break;
1835         case IEEE80211_STYPE_BEACON:
1836                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1837                 break;
1838         case IEEE80211_STYPE_AUTH:
1839                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1840                 break;
1841         case IEEE80211_STYPE_ASSOC_RESP:
1842                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1843                 break;
1844         case IEEE80211_STYPE_REASSOC_RESP:
1845                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1846                 break;
1847         case IEEE80211_STYPE_DEAUTH:
1848                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1849                 break;
1850         case IEEE80211_STYPE_DISASSOC:
1851                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1852                 break;
1853         }
1854
1855         kfree_skb(skb);
1856 }
1857
1858
1859 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1860                            struct ieee80211_rx_status *rx_status)
1861 {
1862         struct ieee80211_mgmt *mgmt;
1863         u16 fc;
1864
1865         if (skb->len < 24) {
1866                 dev_kfree_skb(skb);
1867                 return;
1868         }
1869
1870         mgmt = (struct ieee80211_mgmt *) skb->data;
1871         fc = le16_to_cpu(mgmt->frame_control);
1872
1873         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1874                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1875                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1876                                                      skb->len, rx_status);
1877                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1878                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1879                                                  rx_status);
1880                 }
1881         }
1882
1883         dev_kfree_skb(skb);
1884 }
1885
1886
1887 static int ieee80211_sta_active_ibss(struct net_device *dev)
1888 {
1889         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1890         int active = 0;
1891         struct sta_info *sta;
1892
1893         spin_lock_bh(&local->sta_lock);
1894         list_for_each_entry(sta, &local->sta_list, list) {
1895                 if (sta->dev == dev &&
1896                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1897                                jiffies)) {
1898                         active++;
1899                         break;
1900                 }
1901         }
1902         spin_unlock_bh(&local->sta_lock);
1903
1904         return active;
1905 }
1906
1907
1908 static void ieee80211_sta_expire(struct net_device *dev)
1909 {
1910         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1911         struct sta_info *sta, *tmp;
1912
1913         spin_lock_bh(&local->sta_lock);
1914         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1915                 if (time_after(jiffies, sta->last_rx +
1916                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1917                         printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1918                                "\n", dev->name, MAC_ARG(sta->addr));
1919                         sta_info_free(sta, 1);
1920                 }
1921         spin_unlock_bh(&local->sta_lock);
1922 }
1923
1924
1925 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1926                                      struct ieee80211_if_sta *ifsta)
1927 {
1928         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1929
1930         ieee80211_sta_expire(dev);
1931         if (ieee80211_sta_active_ibss(dev))
1932                 return;
1933
1934         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1935                "IBSS networks with same SSID (merge)\n", dev->name);
1936         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1937 }
1938
1939
1940 void ieee80211_sta_timer(unsigned long data)
1941 {
1942         struct ieee80211_sub_if_data *sdata =
1943                 (struct ieee80211_sub_if_data *) data;
1944         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1945         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1946
1947         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1948         queue_work(local->hw.workqueue, &ifsta->work);
1949 }
1950
1951
1952 void ieee80211_sta_work(struct work_struct *work)
1953 {
1954         struct ieee80211_sub_if_data *sdata =
1955                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1956         struct net_device *dev = sdata->dev;
1957         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1958         struct ieee80211_if_sta *ifsta;
1959         struct sk_buff *skb;
1960
1961         if (!netif_running(dev))
1962                 return;
1963
1964         if (local->sta_scanning)
1965                 return;
1966
1967         if (sdata->type != IEEE80211_IF_TYPE_STA &&
1968             sdata->type != IEEE80211_IF_TYPE_IBSS) {
1969                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1970                        "(type=%d)\n", dev->name, sdata->type);
1971                 return;
1972         }
1973         ifsta = &sdata->u.sta;
1974
1975         while ((skb = skb_dequeue(&ifsta->skb_queue)))
1976                 ieee80211_sta_rx_queued_mgmt(dev, skb);
1977
1978         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1979             ifsta->state != IEEE80211_ASSOCIATE &&
1980             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1981                 ieee80211_sta_start_scan(dev, NULL, 0);
1982                 return;
1983         }
1984
1985         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1986                 if (ieee80211_sta_config_auth(dev, ifsta))
1987                         return;
1988                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1989         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
1990                 return;
1991
1992         switch (ifsta->state) {
1993         case IEEE80211_DISABLED:
1994                 break;
1995         case IEEE80211_AUTHENTICATE:
1996                 ieee80211_authenticate(dev, ifsta);
1997                 break;
1998         case IEEE80211_ASSOCIATE:
1999                 ieee80211_associate(dev, ifsta);
2000                 break;
2001         case IEEE80211_ASSOCIATED:
2002                 ieee80211_associated(dev, ifsta);
2003                 break;
2004         case IEEE80211_IBSS_SEARCH:
2005                 ieee80211_sta_find_ibss(dev, ifsta);
2006                 break;
2007         case IEEE80211_IBSS_JOINED:
2008                 ieee80211_sta_merge_ibss(dev, ifsta);
2009                 break;
2010         default:
2011                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2012                        ifsta->state);
2013                 break;
2014         }
2015
2016         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2017                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2018                        "mixed-cell disabled - disassociate\n", dev->name);
2019
2020                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2021                 ieee80211_set_disassoc(dev, ifsta, 0);
2022         }
2023 }
2024
2025
2026 static void ieee80211_sta_reset_auth(struct net_device *dev,
2027                                      struct ieee80211_if_sta *ifsta)
2028 {
2029         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2030
2031         if (local->ops->reset_tsf) {
2032                 /* Reset own TSF to allow time synchronization work. */
2033                 local->ops->reset_tsf(local_to_hw(local));
2034         }
2035
2036         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2037
2038
2039         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2040                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2041         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2042                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2043         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2044                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2045         else
2046                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2047         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2048                ifsta->auth_alg);
2049         ifsta->auth_transaction = -1;
2050         ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2051         netif_carrier_off(dev);
2052 }
2053
2054
2055 void ieee80211_sta_req_auth(struct net_device *dev,
2056                             struct ieee80211_if_sta *ifsta)
2057 {
2058         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2059         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2060
2061         if (sdata->type != IEEE80211_IF_TYPE_STA)
2062                 return;
2063
2064         if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2065             (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2066                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2067                 queue_work(local->hw.workqueue, &ifsta->work);
2068         }
2069 }
2070
2071 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2072                                     const char *ssid, int ssid_len)
2073 {
2074         int tmp, hidden_ssid;
2075
2076         if (!memcmp(ifsta->ssid, ssid, ssid_len))
2077                 return 1;
2078
2079         if (ifsta->auto_bssid_sel)
2080                 return 0;
2081
2082         hidden_ssid = 1;
2083         tmp = ssid_len;
2084         while (tmp--) {
2085                 if (ssid[tmp] != '\0') {
2086                         hidden_ssid = 0;
2087                         break;
2088                 }
2089         }
2090
2091         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2092                 return 1;
2093
2094         if (ssid_len == 1 && ssid[0] == ' ')
2095                 return 1;
2096
2097         return 0;
2098 }
2099
2100 static int ieee80211_sta_config_auth(struct net_device *dev,
2101                                      struct ieee80211_if_sta *ifsta)
2102 {
2103         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2104         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2105         struct ieee80211_sta_bss *bss, *selected = NULL;
2106         int top_rssi = 0, freq;
2107
2108         if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2109             !ifsta->auto_ssid_sel) {
2110                 ifsta->state = IEEE80211_AUTHENTICATE;
2111                 ieee80211_sta_reset_auth(dev, ifsta);
2112                 return 0;
2113         }
2114
2115         spin_lock_bh(&local->sta_bss_lock);
2116         freq = local->oper_channel->freq;
2117         list_for_each_entry(bss, &local->sta_bss_list, list) {
2118                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2119                         continue;
2120
2121                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2122                     !!sdata->default_key)
2123                         continue;
2124
2125                 if (!ifsta->auto_channel_sel && bss->freq != freq)
2126                         continue;
2127
2128                 if (!ifsta->auto_bssid_sel &&
2129                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2130                         continue;
2131
2132                 if (!ifsta->auto_ssid_sel &&
2133                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2134                         continue;
2135
2136                 if (!selected || top_rssi < bss->rssi) {
2137                         selected = bss;
2138                         top_rssi = bss->rssi;
2139                 }
2140         }
2141         if (selected)
2142                 atomic_inc(&selected->users);
2143         spin_unlock_bh(&local->sta_bss_lock);
2144
2145         if (selected) {
2146                 ieee80211_set_channel(local, -1, selected->freq);
2147                 if (!ifsta->ssid_set)
2148                         ieee80211_sta_set_ssid(dev, selected->ssid,
2149                                                selected->ssid_len);
2150                 ieee80211_sta_set_bssid(dev, selected->bssid);
2151                 ieee80211_rx_bss_put(dev, selected);
2152                 ifsta->state = IEEE80211_AUTHENTICATE;
2153                 ieee80211_sta_reset_auth(dev, ifsta);
2154                 return 0;
2155         } else {
2156                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2157                         if (ifsta->auto_ssid_sel)
2158                                 ieee80211_sta_start_scan(dev, NULL, 0);
2159                         else
2160                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2161                                                          ifsta->ssid_len);
2162                         ifsta->state = IEEE80211_AUTHENTICATE;
2163                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2164                 } else
2165                         ifsta->state = IEEE80211_DISABLED;
2166         }
2167         return -1;
2168 }
2169
2170 static int ieee80211_sta_join_ibss(struct net_device *dev,
2171                                    struct ieee80211_if_sta *ifsta,
2172                                    struct ieee80211_sta_bss *bss)
2173 {
2174         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2175         int res, rates, i, j;
2176         struct sk_buff *skb;
2177         struct ieee80211_mgmt *mgmt;
2178         struct ieee80211_tx_control control;
2179         struct ieee80211_rate *rate;
2180         struct ieee80211_hw_mode *mode;
2181         struct rate_control_extra extra;
2182         u8 *pos;
2183         struct ieee80211_sub_if_data *sdata;
2184
2185         /* Remove possible STA entries from other IBSS networks. */
2186         sta_info_flush(local, NULL);
2187
2188         if (local->ops->reset_tsf) {
2189                 /* Reset own TSF to allow time synchronization work. */
2190                 local->ops->reset_tsf(local_to_hw(local));
2191         }
2192         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2193         res = ieee80211_if_config(dev);
2194         if (res)
2195                 return res;
2196
2197         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2198
2199         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2200         sdata->drop_unencrypted = bss->capability &
2201                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2202
2203         res = ieee80211_set_channel(local, -1, bss->freq);
2204
2205         if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2206                 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2207                        "(%d MHz)\n", dev->name, local->hw.conf.channel,
2208                        local->hw.conf.freq);
2209                 return -1;
2210         }
2211
2212         /* Set beacon template based on scan results */
2213         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2214         do {
2215                 if (!skb)
2216                         break;
2217
2218                 skb_reserve(skb, local->hw.extra_tx_headroom);
2219
2220                 mgmt = (struct ieee80211_mgmt *)
2221                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2222                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2223                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2224                                                    IEEE80211_STYPE_BEACON);
2225                 memset(mgmt->da, 0xff, ETH_ALEN);
2226                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2227                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2228                 mgmt->u.beacon.beacon_int =
2229                         cpu_to_le16(local->hw.conf.beacon_int);
2230                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2231
2232                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2233                 *pos++ = WLAN_EID_SSID;
2234                 *pos++ = ifsta->ssid_len;
2235                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2236
2237                 rates = bss->supp_rates_len;
2238                 if (rates > 8)
2239                         rates = 8;
2240                 pos = skb_put(skb, 2 + rates);
2241                 *pos++ = WLAN_EID_SUPP_RATES;
2242                 *pos++ = rates;
2243                 memcpy(pos, bss->supp_rates, rates);
2244
2245                 pos = skb_put(skb, 2 + 1);
2246                 *pos++ = WLAN_EID_DS_PARAMS;
2247                 *pos++ = 1;
2248                 *pos++ = bss->channel;
2249
2250                 pos = skb_put(skb, 2 + 2);
2251                 *pos++ = WLAN_EID_IBSS_PARAMS;
2252                 *pos++ = 2;
2253                 /* FIX: set ATIM window based on scan results */
2254                 *pos++ = 0;
2255                 *pos++ = 0;
2256
2257                 if (bss->supp_rates_len > 8) {
2258                         rates = bss->supp_rates_len - 8;
2259                         pos = skb_put(skb, 2 + rates);
2260                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2261                         *pos++ = rates;
2262                         memcpy(pos, &bss->supp_rates[8], rates);
2263                 }
2264
2265                 memset(&control, 0, sizeof(control));
2266                 memset(&extra, 0, sizeof(extra));
2267                 extra.mode = local->oper_hw_mode;
2268                 rate = rate_control_get_rate(local, dev, skb, &extra);
2269                 if (!rate) {
2270                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2271                                "for IBSS beacon\n", dev->name);
2272                         break;
2273                 }
2274                 control.tx_rate = (local->short_preamble &&
2275                                    (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2276                         rate->val2 : rate->val;
2277                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2278                 control.power_level = local->hw.conf.power_level;
2279                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2280                 control.retry_limit = 1;
2281
2282                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2283                 if (ifsta->probe_resp) {
2284                         mgmt = (struct ieee80211_mgmt *)
2285                                 ifsta->probe_resp->data;
2286                         mgmt->frame_control =
2287                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2288                                              IEEE80211_STYPE_PROBE_RESP);
2289                 } else {
2290                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2291                                "template for IBSS\n", dev->name);
2292                 }
2293
2294                 if (local->ops->beacon_update &&
2295                     local->ops->beacon_update(local_to_hw(local),
2296                                              skb, &control) == 0) {
2297                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2298                                "template based on scan results\n", dev->name);
2299                         skb = NULL;
2300                 }
2301
2302                 rates = 0;
2303                 mode = local->oper_hw_mode;
2304                 for (i = 0; i < bss->supp_rates_len; i++) {
2305                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2306                         if (mode->mode == MODE_ATHEROS_TURBO)
2307                                 bitrate *= 2;
2308                         for (j = 0; j < mode->num_rates; j++)
2309                                 if (mode->rates[j].rate == bitrate)
2310                                         rates |= BIT(j);
2311                 }
2312                 ifsta->supp_rates_bits = rates;
2313         } while (0);
2314
2315         if (skb) {
2316                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2317                        "template\n", dev->name);
2318                 dev_kfree_skb(skb);
2319         }
2320
2321         ifsta->state = IEEE80211_IBSS_JOINED;
2322         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2323
2324         ieee80211_rx_bss_put(dev, bss);
2325
2326         return res;
2327 }
2328
2329
2330 static int ieee80211_sta_create_ibss(struct net_device *dev,
2331                                      struct ieee80211_if_sta *ifsta)
2332 {
2333         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2334         struct ieee80211_sta_bss *bss;
2335         struct ieee80211_sub_if_data *sdata;
2336         struct ieee80211_hw_mode *mode;
2337         u8 bssid[ETH_ALEN], *pos;
2338         int i;
2339
2340 #if 0
2341         /* Easier testing, use fixed BSSID. */
2342         memset(bssid, 0xfe, ETH_ALEN);
2343 #else
2344         /* Generate random, not broadcast, locally administered BSSID. Mix in
2345          * own MAC address to make sure that devices that do not have proper
2346          * random number generator get different BSSID. */
2347         get_random_bytes(bssid, ETH_ALEN);
2348         for (i = 0; i < ETH_ALEN; i++)
2349                 bssid[i] ^= dev->dev_addr[i];
2350         bssid[0] &= ~0x01;
2351         bssid[0] |= 0x02;
2352 #endif
2353
2354         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2355                dev->name, MAC_ARG(bssid));
2356
2357         bss = ieee80211_rx_bss_add(dev, bssid);
2358         if (!bss)
2359                 return -ENOMEM;
2360
2361         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2362         mode = local->oper_hw_mode;
2363
2364         if (local->hw.conf.beacon_int == 0)
2365                 local->hw.conf.beacon_int = 100;
2366         bss->beacon_int = local->hw.conf.beacon_int;
2367         bss->hw_mode = local->hw.conf.phymode;
2368         bss->channel = local->hw.conf.channel;
2369         bss->freq = local->hw.conf.freq;
2370         bss->last_update = jiffies;
2371         bss->capability = WLAN_CAPABILITY_IBSS;
2372         if (sdata->default_key) {
2373                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2374         } else
2375                 sdata->drop_unencrypted = 0;
2376         bss->supp_rates_len = mode->num_rates;
2377         pos = bss->supp_rates;
2378         for (i = 0; i < mode->num_rates; i++) {
2379                 int rate = mode->rates[i].rate;
2380                 if (mode->mode == MODE_ATHEROS_TURBO)
2381                         rate /= 2;
2382                 *pos++ = (u8) (rate / 5);
2383         }
2384
2385         return ieee80211_sta_join_ibss(dev, ifsta, bss);
2386 }
2387
2388
2389 static int ieee80211_sta_find_ibss(struct net_device *dev,
2390                                    struct ieee80211_if_sta *ifsta)
2391 {
2392         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2393         struct ieee80211_sta_bss *bss;
2394         int found = 0;
2395         u8 bssid[ETH_ALEN];
2396         int active_ibss;
2397
2398         if (ifsta->ssid_len == 0)
2399                 return -EINVAL;
2400
2401         active_ibss = ieee80211_sta_active_ibss(dev);
2402 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2403         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2404                dev->name, active_ibss);
2405 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2406         spin_lock_bh(&local->sta_bss_lock);
2407         list_for_each_entry(bss, &local->sta_bss_list, list) {
2408                 if (ifsta->ssid_len != bss->ssid_len ||
2409                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2410                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
2411                         continue;
2412 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2413                 printk(KERN_DEBUG "   bssid=" MAC_FMT " found\n",
2414                        MAC_ARG(bss->bssid));
2415 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2416                 memcpy(bssid, bss->bssid, ETH_ALEN);
2417                 found = 1;
2418                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2419                         break;
2420         }
2421         spin_unlock_bh(&local->sta_bss_lock);
2422
2423 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2424         printk(KERN_DEBUG "   sta_find_ibss: selected " MAC_FMT " current "
2425                MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2426 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2427         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2428             (bss = ieee80211_rx_bss_get(dev, bssid))) {
2429                 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2430                        " based on configured SSID\n",
2431                        dev->name, MAC_ARG(bssid));
2432                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2433         }
2434 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2435         printk(KERN_DEBUG "   did not try to join ibss\n");
2436 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2437
2438         /* Selected IBSS not found in current scan results - try to scan */
2439         if (ifsta->state == IEEE80211_IBSS_JOINED &&
2440             !ieee80211_sta_active_ibss(dev)) {
2441                 mod_timer(&ifsta->timer, jiffies +
2442                                       IEEE80211_IBSS_MERGE_INTERVAL);
2443         } else if (time_after(jiffies, local->last_scan_completed +
2444                               IEEE80211_SCAN_INTERVAL)) {
2445                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2446                        "join\n", dev->name);
2447                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2448                                               ifsta->ssid_len);
2449         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2450                 int interval = IEEE80211_SCAN_INTERVAL;
2451
2452                 if (time_after(jiffies, ifsta->ibss_join_req +
2453                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
2454                         if (ifsta->create_ibss &&
2455                             local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2456                                 return ieee80211_sta_create_ibss(dev, ifsta);
2457                         if (ifsta->create_ibss) {
2458                                 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2459                                        " configured channel %d (%d MHz)\n",
2460                                        dev->name, local->hw.conf.channel,
2461                                        local->hw.conf.freq);
2462                         }
2463
2464                         /* No IBSS found - decrease scan interval and continue
2465                          * scanning. */
2466                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
2467                 }
2468
2469                 ifsta->state = IEEE80211_IBSS_SEARCH;
2470                 mod_timer(&ifsta->timer, jiffies + interval);
2471                 return 0;
2472         }
2473
2474         return 0;
2475 }
2476
2477
2478 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2479 {
2480         struct ieee80211_sub_if_data *sdata;
2481         struct ieee80211_if_sta *ifsta;
2482         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2483
2484         if (len > IEEE80211_MAX_SSID_LEN)
2485                 return -EINVAL;
2486
2487         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2488          * not defined. */
2489         if (local->ops->conf_tx) {
2490                 struct ieee80211_tx_queue_params qparam;
2491                 int i;
2492
2493                 memset(&qparam, 0, sizeof(qparam));
2494                 /* TODO: are these ok defaults for all hw_modes? */
2495                 qparam.aifs = 2;
2496                 qparam.cw_min =
2497                         local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2498                 qparam.cw_max = 1023;
2499                 qparam.burst_time = 0;
2500                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2501                 {
2502                         local->ops->conf_tx(local_to_hw(local),
2503                                            i + IEEE80211_TX_QUEUE_DATA0,
2504                                            &qparam);
2505                 }
2506                 /* IBSS uses different parameters for Beacon sending */
2507                 qparam.cw_min++;
2508                 qparam.cw_min *= 2;
2509                 qparam.cw_min--;
2510                 local->ops->conf_tx(local_to_hw(local),
2511                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
2512         }
2513
2514         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2515         ifsta = &sdata->u.sta;
2516
2517         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2518                 ifsta->prev_bssid_set = 0;
2519         memcpy(ifsta->ssid, ssid, len);
2520         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2521         ifsta->ssid_len = len;
2522
2523         ifsta->ssid_set = len ? 1 : 0;
2524         if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2525                 ifsta->ibss_join_req = jiffies;
2526                 ifsta->state = IEEE80211_IBSS_SEARCH;
2527                 return ieee80211_sta_find_ibss(dev, ifsta);
2528         }
2529         return 0;
2530 }
2531
2532
2533 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2534 {
2535         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2536         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2537         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2538         *len = ifsta->ssid_len;
2539         return 0;
2540 }
2541
2542
2543 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2544 {
2545         struct ieee80211_sub_if_data *sdata;
2546         struct ieee80211_if_sta *ifsta;
2547         int res;
2548
2549         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2550         ifsta = &sdata->u.sta;
2551
2552         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2553                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2554                 res = ieee80211_if_config(dev);
2555                 if (res) {
2556                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2557                                "the low-level driver\n", dev->name);
2558                         return res;
2559                 }
2560         }
2561
2562         if (!is_valid_ether_addr(bssid))
2563                 ifsta->bssid_set = 0;
2564         else
2565                 ifsta->bssid_set = 1;
2566         return 0;
2567 }
2568
2569
2570 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2571                                     struct ieee80211_sub_if_data *sdata,
2572                                     int powersave)
2573 {
2574         struct sk_buff *skb;
2575         struct ieee80211_hdr *nullfunc;
2576         u16 fc;
2577
2578         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2579         if (!skb) {
2580                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2581                        "frame\n", sdata->dev->name);
2582                 return;
2583         }
2584         skb_reserve(skb, local->hw.extra_tx_headroom);
2585
2586         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2587         memset(nullfunc, 0, 24);
2588         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2589              IEEE80211_FCTL_TODS;
2590         if (powersave)
2591                 fc |= IEEE80211_FCTL_PM;
2592         nullfunc->frame_control = cpu_to_le16(fc);
2593         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2594         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2595         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2596
2597         ieee80211_sta_tx(sdata->dev, skb, 0);
2598 }
2599
2600
2601 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2602 {
2603         struct ieee80211_local *local = hw_to_local(hw);
2604         struct net_device *dev = local->scan_dev;
2605         struct ieee80211_sub_if_data *sdata;
2606         union iwreq_data wrqu;
2607
2608         local->last_scan_completed = jiffies;
2609         wmb();
2610         local->sta_scanning = 0;
2611
2612         if (ieee80211_hw_config(local))
2613                 printk(KERN_DEBUG "%s: failed to restore operational"
2614                        "channel after scan\n", dev->name);
2615
2616         if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2617             ieee80211_if_config(dev))
2618                 printk(KERN_DEBUG "%s: failed to restore operational"
2619                        "BSSID after scan\n", dev->name);
2620
2621         memset(&wrqu, 0, sizeof(wrqu));
2622         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2623
2624         read_lock(&local->sub_if_lock);
2625         list_for_each_entry(sdata, &local->sub_if_list, list) {
2626
2627                 /* No need to wake the master device. */
2628                 if (sdata->dev == local->mdev)
2629                         continue;
2630
2631                 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2632                         if (sdata->u.sta.associated)
2633                                 ieee80211_send_nullfunc(local, sdata, 0);
2634                         ieee80211_sta_timer((unsigned long)sdata);
2635                 }
2636
2637                 netif_wake_queue(sdata->dev);
2638         }
2639         read_unlock(&local->sub_if_lock);
2640
2641         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2642         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2643                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2644                 if (!ifsta->bssid_set ||
2645                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
2646                     !ieee80211_sta_active_ibss(dev)))
2647                         ieee80211_sta_find_ibss(dev, ifsta);
2648         }
2649 }
2650 EXPORT_SYMBOL(ieee80211_scan_completed);
2651
2652 void ieee80211_sta_scan_work(struct work_struct *work)
2653 {
2654         struct ieee80211_local *local =
2655                 container_of(work, struct ieee80211_local, scan_work.work);
2656         struct net_device *dev = local->scan_dev;
2657         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2658         struct ieee80211_hw_mode *mode;
2659         struct ieee80211_channel *chan;
2660         int skip;
2661         unsigned long next_delay = 0;
2662
2663         if (!local->sta_scanning)
2664                 return;
2665
2666         switch (local->scan_state) {
2667         case SCAN_SET_CHANNEL:
2668                 mode = local->scan_hw_mode;
2669                 if (local->scan_hw_mode->list.next == &local->modes_list &&
2670                     local->scan_channel_idx >= mode->num_channels) {
2671                         ieee80211_scan_completed(local_to_hw(local));
2672                         return;
2673                 }
2674                 skip = !(local->enabled_modes & (1 << mode->mode));
2675                 chan = &mode->channels[local->scan_channel_idx];
2676                 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2677                     (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2678                      !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2679                     (local->hw_modes & local->enabled_modes &
2680                      (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2681                         skip = 1;
2682
2683                 if (!skip) {
2684 #if 0
2685                         printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2686                                dev->name, chan->chan, chan->freq);
2687 #endif
2688
2689                         local->scan_channel = chan;
2690                         if (ieee80211_hw_config(local)) {
2691                                 printk(KERN_DEBUG "%s: failed to set channel "
2692                                        "%d (%d MHz) for scan\n", dev->name,
2693                                        chan->chan, chan->freq);
2694                                 skip = 1;
2695                         }
2696                 }
2697
2698                 local->scan_channel_idx++;
2699                 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2700                         if (local->scan_hw_mode->list.next != &local->modes_list) {
2701                                 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2702                                                                  struct ieee80211_hw_mode,
2703                                                                  list);
2704                                 local->scan_channel_idx = 0;
2705                         }
2706                 }
2707
2708                 if (skip)
2709                         break;
2710
2711                 next_delay = IEEE80211_PROBE_DELAY +
2712                              usecs_to_jiffies(local->hw.channel_change_time);
2713                 local->scan_state = SCAN_SEND_PROBE;
2714                 break;
2715         case SCAN_SEND_PROBE:
2716                 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2717                         ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2718                                                  local->scan_ssid_len);
2719                         next_delay = IEEE80211_CHANNEL_TIME;
2720                 } else
2721                         next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2722                 local->scan_state = SCAN_SET_CHANNEL;
2723                 break;
2724         }
2725
2726         if (local->sta_scanning)
2727                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2728                                    next_delay);
2729 }
2730
2731
2732 static int ieee80211_sta_start_scan(struct net_device *dev,
2733                                     u8 *ssid, size_t ssid_len)
2734 {
2735         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2736         struct ieee80211_sub_if_data *sdata;
2737
2738         if (ssid_len > IEEE80211_MAX_SSID_LEN)
2739                 return -EINVAL;
2740
2741         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
2742          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2743          * BSSID: MACAddress
2744          * SSID
2745          * ScanType: ACTIVE, PASSIVE
2746          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2747          *    a Probe frame during active scanning
2748          * ChannelList
2749          * MinChannelTime (>= ProbeDelay), in TU
2750          * MaxChannelTime: (>= MinChannelTime), in TU
2751          */
2752
2753          /* MLME-SCAN.confirm
2754           * BSSDescriptionSet
2755           * ResultCode: SUCCESS, INVALID_PARAMETERS
2756          */
2757
2758         if (local->sta_scanning) {
2759                 if (local->scan_dev == dev)
2760                         return 0;
2761                 return -EBUSY;
2762         }
2763
2764         if (local->ops->hw_scan) {
2765                 int rc = local->ops->hw_scan(local_to_hw(local),
2766                                             ssid, ssid_len);
2767                 if (!rc) {
2768                         local->sta_scanning = 1;
2769                         local->scan_dev = dev;
2770                 }
2771                 return rc;
2772         }
2773
2774         local->sta_scanning = 1;
2775
2776         read_lock(&local->sub_if_lock);
2777         list_for_each_entry(sdata, &local->sub_if_list, list) {
2778
2779                 /* Don't stop the master interface, otherwise we can't transmit
2780                  * probes! */
2781                 if (sdata->dev == local->mdev)
2782                         continue;
2783
2784                 netif_stop_queue(sdata->dev);
2785                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2786                     sdata->u.sta.associated)
2787                         ieee80211_send_nullfunc(local, sdata, 1);
2788         }
2789         read_unlock(&local->sub_if_lock);
2790
2791         if (ssid) {
2792                 local->scan_ssid_len = ssid_len;
2793                 memcpy(local->scan_ssid, ssid, ssid_len);
2794         } else
2795                 local->scan_ssid_len = 0;
2796         local->scan_state = SCAN_SET_CHANNEL;
2797         local->scan_hw_mode = list_entry(local->modes_list.next,
2798                                          struct ieee80211_hw_mode,
2799                                          list);
2800         local->scan_channel_idx = 0;
2801         local->scan_dev = dev;
2802
2803         if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2804             ieee80211_if_config(dev))
2805                 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2806                        dev->name);
2807
2808         /* TODO: start scan as soon as all nullfunc frames are ACKed */
2809         queue_delayed_work(local->hw.workqueue, &local->scan_work,
2810                            IEEE80211_CHANNEL_TIME);
2811
2812         return 0;
2813 }
2814
2815
2816 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2817 {
2818         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2819         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2820         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2821
2822         if (sdata->type != IEEE80211_IF_TYPE_STA)
2823                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2824
2825         if (local->sta_scanning) {
2826                 if (local->scan_dev == dev)
2827                         return 0;
2828                 return -EBUSY;
2829         }
2830
2831         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2832         queue_work(local->hw.workqueue, &ifsta->work);
2833         return 0;
2834 }
2835
2836 static char *
2837 ieee80211_sta_scan_result(struct net_device *dev,
2838                           struct ieee80211_sta_bss *bss,
2839                           char *current_ev, char *end_buf)
2840 {
2841         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2842         struct iw_event iwe;
2843
2844         if (time_after(jiffies,
2845                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2846                 return current_ev;
2847
2848         if (!(local->enabled_modes & (1 << bss->hw_mode)))
2849                 return current_ev;
2850
2851         if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2852             !bss->wpa_ie && !bss->rsn_ie)
2853                 return current_ev;
2854
2855         if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2856             (local->scan_ssid_len != bss->ssid_len ||
2857              memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2858                 return current_ev;
2859
2860         memset(&iwe, 0, sizeof(iwe));
2861         iwe.cmd = SIOCGIWAP;
2862         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2863         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2864         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2865                                           IW_EV_ADDR_LEN);
2866
2867         memset(&iwe, 0, sizeof(iwe));
2868         iwe.cmd = SIOCGIWESSID;
2869         iwe.u.data.length = bss->ssid_len;
2870         iwe.u.data.flags = 1;
2871         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2872                                           bss->ssid);
2873
2874         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2875                 memset(&iwe, 0, sizeof(iwe));
2876                 iwe.cmd = SIOCGIWMODE;
2877                 if (bss->capability & WLAN_CAPABILITY_ESS)
2878                         iwe.u.mode = IW_MODE_MASTER;
2879                 else
2880                         iwe.u.mode = IW_MODE_ADHOC;
2881                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2882                                                   IW_EV_UINT_LEN);
2883         }
2884
2885         memset(&iwe, 0, sizeof(iwe));
2886         iwe.cmd = SIOCGIWFREQ;
2887         iwe.u.freq.m = bss->channel;
2888         iwe.u.freq.e = 0;
2889         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2890                                           IW_EV_FREQ_LEN);
2891         iwe.u.freq.m = bss->freq * 100000;
2892         iwe.u.freq.e = 1;
2893         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2894                                           IW_EV_FREQ_LEN);
2895
2896         memset(&iwe, 0, sizeof(iwe));
2897         iwe.cmd = IWEVQUAL;
2898         iwe.u.qual.qual = bss->signal;
2899         iwe.u.qual.level = bss->rssi;
2900         iwe.u.qual.noise = bss->noise;
2901         iwe.u.qual.updated = local->wstats_flags;
2902         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2903                                           IW_EV_QUAL_LEN);
2904
2905         memset(&iwe, 0, sizeof(iwe));
2906         iwe.cmd = SIOCGIWENCODE;
2907         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2908                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2909         else
2910                 iwe.u.data.flags = IW_ENCODE_DISABLED;
2911         iwe.u.data.length = 0;
2912         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2913
2914         if (bss && bss->wpa_ie) {
2915                 memset(&iwe, 0, sizeof(iwe));
2916                 iwe.cmd = IWEVGENIE;
2917                 iwe.u.data.length = bss->wpa_ie_len;
2918                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2919                                                   bss->wpa_ie);
2920         }
2921
2922         if (bss && bss->rsn_ie) {
2923                 memset(&iwe, 0, sizeof(iwe));
2924                 iwe.cmd = IWEVGENIE;
2925                 iwe.u.data.length = bss->rsn_ie_len;
2926                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2927                                                   bss->rsn_ie);
2928         }
2929
2930         if (bss && bss->supp_rates_len > 0) {
2931                 /* display all supported rates in readable format */
2932                 char *p = current_ev + IW_EV_LCP_LEN;
2933                 int i;
2934
2935                 memset(&iwe, 0, sizeof(iwe));
2936                 iwe.cmd = SIOCGIWRATE;
2937                 /* Those two flags are ignored... */
2938                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2939
2940                 for (i = 0; i < bss->supp_rates_len; i++) {
2941                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
2942                                                         0x7f) * 500000);
2943                         p = iwe_stream_add_value(current_ev, p,
2944                                         end_buf, &iwe, IW_EV_PARAM_LEN);
2945                 }
2946                 current_ev = p;
2947         }
2948
2949         if (bss) {
2950                 char *buf;
2951                 buf = kmalloc(30, GFP_ATOMIC);
2952                 if (buf) {
2953                         memset(&iwe, 0, sizeof(iwe));
2954                         iwe.cmd = IWEVCUSTOM;
2955                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2956                         iwe.u.data.length = strlen(buf);
2957                         current_ev = iwe_stream_add_point(current_ev, end_buf,
2958                                                           &iwe, buf);
2959                         kfree(buf);
2960                 }
2961         }
2962
2963         do {
2964                 char *buf;
2965
2966                 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2967                         break;
2968
2969                 buf = kmalloc(100, GFP_ATOMIC);
2970                 if (!buf)
2971                         break;
2972
2973                 memset(&iwe, 0, sizeof(iwe));
2974                 iwe.cmd = IWEVCUSTOM;
2975                 sprintf(buf, "bcn_int=%d", bss->beacon_int);
2976                 iwe.u.data.length = strlen(buf);
2977                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2978                                                   buf);
2979
2980                 memset(&iwe, 0, sizeof(iwe));
2981                 iwe.cmd = IWEVCUSTOM;
2982                 sprintf(buf, "capab=0x%04x", bss->capability);
2983                 iwe.u.data.length = strlen(buf);
2984                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2985                                                   buf);
2986
2987                 kfree(buf);
2988                 break;
2989         } while (0);
2990
2991         return current_ev;
2992 }
2993
2994
2995 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
2996 {
2997         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2998         char *current_ev = buf;
2999         char *end_buf = buf + len;
3000         struct ieee80211_sta_bss *bss;
3001
3002         spin_lock_bh(&local->sta_bss_lock);
3003         list_for_each_entry(bss, &local->sta_bss_list, list) {
3004                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3005                         spin_unlock_bh(&local->sta_bss_lock);
3006                         return -E2BIG;
3007                 }
3008                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3009                                                        end_buf);
3010         }
3011         spin_unlock_bh(&local->sta_bss_lock);
3012         return current_ev - buf;
3013 }
3014
3015
3016 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3017 {
3018         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3019         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3020         kfree(ifsta->extra_ie);
3021         if (len == 0) {
3022                 ifsta->extra_ie = NULL;
3023                 ifsta->extra_ie_len = 0;
3024                 return 0;
3025         }
3026         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3027         if (!ifsta->extra_ie) {
3028                 ifsta->extra_ie_len = 0;
3029                 return -ENOMEM;
3030         }
3031         memcpy(ifsta->extra_ie, ie, len);
3032         ifsta->extra_ie_len = len;
3033         return 0;
3034 }
3035
3036
3037 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3038                                          struct sk_buff *skb, u8 *bssid,
3039                                          u8 *addr)
3040 {
3041         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3042         struct sta_info *sta;
3043         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3044
3045         /* TODO: Could consider removing the least recently used entry and
3046          * allow new one to be added. */
3047         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3048                 if (net_ratelimit()) {
3049                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3050                                "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3051                 }
3052                 return NULL;
3053         }
3054
3055         printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3056                local->mdev->name, MAC_ARG(addr), dev->name);
3057
3058         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3059         if (!sta)
3060                 return NULL;
3061
3062         sta->supp_rates = sdata->u.sta.supp_rates_bits;
3063
3064         rate_control_rate_init(sta, local);
3065
3066         return sta; /* caller will call sta_info_put() */
3067 }
3068
3069
3070 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3071 {
3072         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3073         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3074
3075         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3076                dev->name, reason);
3077
3078         if (sdata->type != IEEE80211_IF_TYPE_STA &&
3079             sdata->type != IEEE80211_IF_TYPE_IBSS)
3080                 return -EINVAL;
3081
3082         ieee80211_send_deauth(dev, ifsta, reason);
3083         ieee80211_set_disassoc(dev, ifsta, 1);
3084         return 0;
3085 }
3086
3087
3088 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3089 {
3090         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3091         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3092
3093         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3094                dev->name, reason);
3095
3096         if (sdata->type != IEEE80211_IF_TYPE_STA)
3097                 return -EINVAL;
3098
3099         if (!ifsta->associated)
3100                 return -1;
3101
3102         ieee80211_send_disassoc(dev, ifsta, reason);
3103         ieee80211_set_disassoc(dev, ifsta, 0);
3104         return 0;
3105 }