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 <linux/rtnetlink.h>
  29 #include <net/iw_handler.h>
  30 #include <asm/types.h>
  31
  32 #include <net/mac80211.h>
  33 #include "ieee80211_i.h"
  34 #include "ieee80211_rate.h"
  35 #include "hostapd_ioctl.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  43 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  44 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  46 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  47
  48 #define IEEE80211_PROBE_DELAY (HZ / 33)
  49 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  50 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  51 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  52 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  53 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  54
  55 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  56
  57
  58 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  59
  60 #define ERP_INFO_USE_PROTECTION BIT(1)
  61
  62 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  63                                      u8 *ssid, size_t ssid_len);
  64 static struct ieee80211_sta_bss *
  65 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
  66 static void ieee80211_rx_bss_put(struct net_device *dev,
  67                                  struct ieee80211_sta_bss *bss);
  68 static int ieee80211_sta_find_ibss(struct net_device *dev,
  69                                    struct ieee80211_if_sta *ifsta);
  70 static int ieee80211_sta_wep_configured(struct net_device *dev);
  71 static int ieee80211_sta_start_scan(struct net_device *dev,
  72                                     u8 *ssid, size_t ssid_len);
  73 static int ieee80211_sta_config_auth(struct net_device *dev,
  74                                      struct ieee80211_if_sta *ifsta);
  75
  76
  77 /* Parsed Information Elements */
  78 struct ieee802_11_elems {
  79         /* pointers to IEs */
  80         u8 *ssid;
  81         u8 *supp_rates;
  82         u8 *fh_params;
  83         u8 *ds_params;
  84         u8 *cf_params;
  85         u8 *tim;
  86         u8 *ibss_params;
  87         u8 *challenge;
  88         u8 *wpa;
  89         u8 *rsn;
  90         u8 *erp_info;
  91         u8 *ext_supp_rates;
  92         u8 *wmm_info;
  93         u8 *wmm_param;
  94
  95         /* length of them, respectively */
  96         u8 ssid_len;
  97         u8 supp_rates_len;
  98         u8 fh_params_len;
  99         u8 ds_params_len;
 100         u8 cf_params_len;
 101         u8 tim_len;
 102         u8 ibss_params_len;
 103         u8 challenge_len;
 104         u8 wpa_len;
 105         u8 rsn_len;
 106         u8 erp_info_len;
 107         u8 ext_supp_rates_len;
 108         u8 wmm_info_len;
 109         u8 wmm_param_len;
 110 };
 111
 112 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
 113
 114
 115 static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
 116                                        struct ieee802_11_elems *elems)
 117 {
 118         size_t left = len;
 119         u8 *pos = start;
 120         int unknown = 0;
 121
 122         memset(elems, 0, sizeof(*elems));
 123
 124         while (left >= 2) {
 125                 u8 id, elen;
 126
 127                 id = *pos++;
 128                 elen = *pos++;
 129                 left -= 2;
 130
 131                 if (elen > left) {
 132 #if 0
 133                         if (net_ratelimit())
 134                                 printk(KERN_DEBUG "IEEE 802.11 element parse "
 135                                        "failed (id=%d elen=%d left=%d)\n",
 136                                        id, elen, left);
 137 #endif
 138                         return ParseFailed;
 139                 }
 140
 141                 switch (id) {
 142                 case WLAN_EID_SSID:
 143                         elems->ssid = pos;
 144                         elems->ssid_len = elen;
 145                         break;
 146                 case WLAN_EID_SUPP_RATES:
 147                         elems->supp_rates = pos;
 148                         elems->supp_rates_len = elen;
 149                         break;
 150                 case WLAN_EID_FH_PARAMS:
 151                         elems->fh_params = pos;
 152                         elems->fh_params_len = elen;
 153                         break;
 154                 case WLAN_EID_DS_PARAMS:
 155                         elems->ds_params = pos;
 156                         elems->ds_params_len = elen;
 157                         break;
 158                 case WLAN_EID_CF_PARAMS:
 159                         elems->cf_params = pos;
 160                         elems->cf_params_len = elen;
 161                         break;
 162                 case WLAN_EID_TIM:
 163                         elems->tim = pos;
 164                         elems->tim_len = elen;
 165                         break;
 166                 case WLAN_EID_IBSS_PARAMS:
 167                         elems->ibss_params = pos;
 168                         elems->ibss_params_len = elen;
 169                         break;
 170                 case WLAN_EID_CHALLENGE:
 171                         elems->challenge = pos;
 172                         elems->challenge_len = elen;
 173                         break;
 174                 case WLAN_EID_WPA:
 175                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 176                             pos[2] == 0xf2) {
 177                                 /* Microsoft OUI (00:50:F2) */
 178                                 if (pos[3] == 1) {
 179                                         /* OUI Type 1 - WPA IE */
 180                                         elems->wpa = pos;
 181                                         elems->wpa_len = elen;
 182                                 } else if (elen >= 5 && pos[3] == 2) {
 183                                         if (pos[4] == 0) {
 184                                                 elems->wmm_info = pos;
 185                                                 elems->wmm_info_len = elen;
 186                                         } else if (pos[4] == 1) {
 187                                                 elems->wmm_param = pos;
 188                                                 elems->wmm_param_len = elen;
 189                                         }
 190                                 }
 191                         }
 192                         break;
 193                 case WLAN_EID_RSN:
 194                         elems->rsn = pos;
 195                         elems->rsn_len = elen;
 196                         break;
 197                 case WLAN_EID_ERP_INFO:
 198                         elems->erp_info = pos;
 199                         elems->erp_info_len = elen;
 200                         break;
 201                 case WLAN_EID_EXT_SUPP_RATES:
 202                         elems->ext_supp_rates = pos;
 203                         elems->ext_supp_rates_len = elen;
 204                         break;
 205                 default:
 206 #if 0
 207                         printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
 208                                       "unknown element (id=%d elen=%d)\n",
 209                                       id, elen);
 210 #endif
 211                         unknown++;
 212                         break;
 213                 }
 214
 215                 left -= elen;
 216                 pos += elen;
 217         }
 218
 219         /* Do not trigger error if left == 1 as Apple Airport base stations
 220          * send AssocResps that are one spurious byte too long. */
 221
 222         return unknown ? ParseUnknown : ParseOK;
 223 }
 224
 225
 226
 227
 228 static int ecw2cw(int ecw)
 229 {
 230         int cw = 1;
 231         while (ecw > 0) {
 232                 cw <<= 1;
 233                 ecw--;
 234         }
 235         return cw - 1;
 236 }
 237
 238
 239 static void ieee80211_sta_wmm_params(struct net_device *dev,
 240                                      struct ieee80211_if_sta *ifsta,
 241                                      u8 *wmm_param, size_t wmm_param_len)
 242 {
 243         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 244         struct ieee80211_tx_queue_params params;
 245         size_t left;
 246         int count;
 247         u8 *pos;
 248
 249         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 250                 return;
 251         count = wmm_param[6] & 0x0f;
 252         if (count == ifsta->wmm_last_param_set)
 253                 return;
 254         ifsta->wmm_last_param_set = count;
 255
 256         pos = wmm_param + 8;
 257         left = wmm_param_len - 8;
 258
 259         memset(&params, 0, sizeof(params));
 260
 261         if (!local->ops->conf_tx)
 262                 return;
 263
 264         local->wmm_acm = 0;
 265         for (; left >= 4; left -= 4, pos += 4) {
 266                 int aci = (pos[0] >> 5) & 0x03;
 267                 int acm = (pos[0] >> 4) & 0x01;
 268                 int queue;
 269
 270                 switch (aci) {
 271                 case 1:
 272                         queue = IEEE80211_TX_QUEUE_DATA3;
 273                         if (acm) {
 274                                 local->wmm_acm |= BIT(0) | BIT(3);
 275                         }
 276                         break;
 277                 case 2:
 278                         queue = IEEE80211_TX_QUEUE_DATA1;
 279                         if (acm) {
 280                                 local->wmm_acm |= BIT(4) | BIT(5);
 281                         }
 282                         break;
 283                 case 3:
 284                         queue = IEEE80211_TX_QUEUE_DATA0;
 285                         if (acm) {
 286                                 local->wmm_acm |= BIT(6) | BIT(7);
 287                         }
 288                         break;
 289                 case 0:
 290                 default:
 291                         queue = IEEE80211_TX_QUEUE_DATA2;
 292                         if (acm) {
 293                                 local->wmm_acm |= BIT(1) | BIT(2);
 294                         }
 295                         break;
 296                 }
 297
 298                 params.aifs = pos[0] & 0x0f;
 299                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 300                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 301                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 302                 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 303                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 304                        "cWmin=%d cWmax=%d burst=%d\n",
 305                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 306                        params.cw_max, params.burst_time);
 307                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 308                  * AC for now) */
 309                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 310                         printk(KERN_DEBUG "%s: failed to set TX queue "
 311                                "parameters for queue %d\n", dev->name, queue);
 312                 }
 313         }
 314 }
 315
 316
 317 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
 318 {
 319         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 320         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 321         int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 322
 323         if (use_protection != sdata->use_protection) {
 324                 if (net_ratelimit()) {
 325                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 326                                MAC_FMT ")\n",
 327                                dev->name,
 328                                use_protection ? "enabled" : "disabled",
 329                                MAC_ARG(ifsta->bssid));
 330                 }
 331                 sdata->use_protection = use_protection;
 332         }
 333 }
 334
 335
 336 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 337                                          struct ieee80211_if_sta *ifsta)
 338 {
 339         char *buf;
 340         size_t len;
 341         int i;
 342         union iwreq_data wrqu;
 343
 344         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 345                 return;
 346
 347         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 348                                 ifsta->assocresp_ies_len), GFP_ATOMIC);
 349         if (!buf)
 350                 return;
 351
 352         len = sprintf(buf, "ASSOCINFO(");
 353         if (ifsta->assocreq_ies) {
 354                 len += sprintf(buf + len, "ReqIEs=");
 355                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 356                         len += sprintf(buf + len, "%02x",
 357                                        ifsta->assocreq_ies[i]);
 358                 }
 359         }
 360         if (ifsta->assocresp_ies) {
 361                 if (ifsta->assocreq_ies)
 362                         len += sprintf(buf + len, " ");
 363                 len += sprintf(buf + len, "RespIEs=");
 364                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 365                         len += sprintf(buf + len, "%02x",
 366                                        ifsta->assocresp_ies[i]);
 367                 }
 368         }
 369         len += sprintf(buf + len, ")");
 370
 371         if (len > IW_CUSTOM_MAX) {
 372                 len = sprintf(buf, "ASSOCRESPIE=");
 373                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 374                         len += sprintf(buf + len, "%02x",
 375                                        ifsta->assocresp_ies[i]);
 376                 }
 377         }
 378
 379         memset(&wrqu, 0, sizeof(wrqu));
 380         wrqu.data.length = len;
 381         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 382
 383         kfree(buf);
 384 }
 385
 386
 387 static void ieee80211_set_associated(struct net_device *dev,
 388                                      struct ieee80211_if_sta *ifsta, int assoc)
 389 {
 390         union iwreq_data wrqu;
 391         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 392
 393         if (ifsta->associated == assoc)
 394                 return;
 395
 396         ifsta->associated = assoc;
 397
 398         if (assoc) {
 399                 struct ieee80211_sub_if_data *sdata;
 400                 struct ieee80211_sta_bss *bss;
 401                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 402                 if (sdata->type != IEEE80211_IF_TYPE_STA)
 403                         return;
 404
 405                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
 406                 if (bss) {
 407                         if (bss->has_erp_value)
 408                                 ieee80211_handle_erp_ie(dev, bss->erp_value);
 409                         ieee80211_rx_bss_put(dev, bss);
 410                 }
 411
 412                 netif_carrier_on(dev);
 413                 ifsta->prev_bssid_set = 1;
 414                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 415                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 416                 ieee80211_sta_send_associnfo(dev, ifsta);
 417         } else {
 418                 netif_carrier_off(dev);
 419                 sdata->use_protection = 0;
 420                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 421         }
 422         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 423         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 424         ifsta->last_probe = jiffies;
 425 }
 426
 427 static void ieee80211_set_disassoc(struct net_device *dev,
 428                                    struct ieee80211_if_sta *ifsta, int deauth)
 429 {
 430         if (deauth)
 431                 ifsta->auth_tries = 0;
 432         ifsta->assoc_tries = 0;
 433         ieee80211_set_associated(dev, ifsta, 0);
 434 }
 435
 436 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 437                              int encrypt)
 438 {
 439         struct ieee80211_sub_if_data *sdata;
 440         struct ieee80211_tx_packet_data *pkt_data;
 441
 442         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 443         skb->dev = sdata->local->mdev;
 444         skb_set_mac_header(skb, 0);
 445         skb_set_network_header(skb, 0);
 446         skb_set_transport_header(skb, 0);
 447
 448         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 449         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 450         pkt_data->ifindex = sdata->dev->ifindex;
 451         pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
 452         pkt_data->do_not_encrypt = !encrypt;
 453
 454         dev_queue_xmit(skb);
 455 }
 456
 457
 458 static void ieee80211_send_auth(struct net_device *dev,
 459                                 struct ieee80211_if_sta *ifsta,
 460                                 int transaction, u8 *extra, size_t extra_len,
 461                                 int encrypt)
 462 {
 463         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 464         struct sk_buff *skb;
 465         struct ieee80211_mgmt *mgmt;
 466
 467         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 468                             sizeof(*mgmt) + 6 + extra_len);
 469         if (!skb) {
 470                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 471                        "frame\n", dev->name);
 472                 return;
 473         }
 474         skb_reserve(skb, local->hw.extra_tx_headroom);
 475
 476         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 477         memset(mgmt, 0, 24 + 6);
 478         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 479                                            IEEE80211_STYPE_AUTH);
 480         if (encrypt)
 481                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 482         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 483         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 484         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 485         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 486         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 487         ifsta->auth_transaction = transaction + 1;
 488         mgmt->u.auth.status_code = cpu_to_le16(0);
 489         if (extra)
 490                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 491
 492         ieee80211_sta_tx(dev, skb, encrypt);
 493 }
 494
 495
 496 static void ieee80211_authenticate(struct net_device *dev,
 497                                    struct ieee80211_if_sta *ifsta)
 498 {
 499         ifsta->auth_tries++;
 500         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 501                 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
 502                        " timed out\n",
 503                        dev->name, MAC_ARG(ifsta->bssid));
 504                 ifsta->state = IEEE80211_DISABLED;
 505                 return;
 506         }
 507
 508         ifsta->state = IEEE80211_AUTHENTICATE;
 509         printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
 510                dev->name, MAC_ARG(ifsta->bssid));
 511
 512         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 513
 514         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 515 }
 516
 517
 518 static void ieee80211_send_assoc(struct net_device *dev,
 519                                  struct ieee80211_if_sta *ifsta)
 520 {
 521         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 522         struct ieee80211_hw_mode *mode;
 523         struct sk_buff *skb;
 524         struct ieee80211_mgmt *mgmt;
 525         u8 *pos, *ies;
 526         int i, len;
 527         u16 capab;
 528         struct ieee80211_sta_bss *bss;
 529         int wmm = 0;
 530
 531         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 532                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 533                             ifsta->ssid_len);
 534         if (!skb) {
 535                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 536                        "frame\n", dev->name);
 537                 return;
 538         }
 539         skb_reserve(skb, local->hw.extra_tx_headroom);
 540
 541         mode = local->oper_hw_mode;
 542         capab = ifsta->capab;
 543         if (mode->mode == MODE_IEEE80211G) {
 544                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 545                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 546         }
 547         bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
 548         if (bss) {
 549                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 550                         capab |= WLAN_CAPABILITY_PRIVACY;
 551                 if (bss->wmm_ie) {
 552                         wmm = 1;
 553                 }
 554                 ieee80211_rx_bss_put(dev, bss);
 555         }
 556
 557         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 558         memset(mgmt, 0, 24);
 559         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 560         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 561         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 562
 563         if (ifsta->prev_bssid_set) {
 564                 skb_put(skb, 10);
 565                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 566                                                    IEEE80211_STYPE_REASSOC_REQ);
 567                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 568                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 569                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 570                        ETH_ALEN);
 571         } else {
 572                 skb_put(skb, 4);
 573                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 574                                                    IEEE80211_STYPE_ASSOC_REQ);
 575                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 576                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 577         }
 578
 579         /* SSID */
 580         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 581         *pos++ = WLAN_EID_SSID;
 582         *pos++ = ifsta->ssid_len;
 583         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 584
 585         len = mode->num_rates;
 586         if (len > 8)
 587                 len = 8;
 588         pos = skb_put(skb, len + 2);
 589         *pos++ = WLAN_EID_SUPP_RATES;
 590         *pos++ = len;
 591         for (i = 0; i < len; i++) {
 592                 int rate = mode->rates[i].rate;
 593                 if (mode->mode == MODE_ATHEROS_TURBO)
 594                         rate /= 2;
 595                 *pos++ = (u8) (rate / 5);
 596         }
 597
 598         if (mode->num_rates > len) {
 599                 pos = skb_put(skb, mode->num_rates - len + 2);
 600                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 601                 *pos++ = mode->num_rates - len;
 602                 for (i = len; i < mode->num_rates; i++) {
 603                         int rate = mode->rates[i].rate;
 604                         if (mode->mode == MODE_ATHEROS_TURBO)
 605                                 rate /= 2;
 606                         *pos++ = (u8) (rate / 5);
 607                 }
 608         }
 609
 610         if (ifsta->extra_ie) {
 611                 pos = skb_put(skb, ifsta->extra_ie_len);
 612                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 613         }
 614
 615         if (wmm && ifsta->wmm_enabled) {
 616                 pos = skb_put(skb, 9);
 617                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 618                 *pos++ = 7; /* len */
 619                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 620                 *pos++ = 0x50;
 621                 *pos++ = 0xf2;
 622                 *pos++ = 2; /* WME */
 623                 *pos++ = 0; /* WME info */
 624                 *pos++ = 1; /* WME ver */
 625                 *pos++ = 0;
 626         }
 627
 628         kfree(ifsta->assocreq_ies);
 629         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 630         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
 631         if (ifsta->assocreq_ies)
 632                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 633
 634         ieee80211_sta_tx(dev, skb, 0);
 635 }
 636
 637
 638 static void ieee80211_send_deauth(struct net_device *dev,
 639                                   struct ieee80211_if_sta *ifsta, u16 reason)
 640 {
 641         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 642         struct sk_buff *skb;
 643         struct ieee80211_mgmt *mgmt;
 644
 645         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 646         if (!skb) {
 647                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 648                        "frame\n", dev->name);
 649                 return;
 650         }
 651         skb_reserve(skb, local->hw.extra_tx_headroom);
 652
 653         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 654         memset(mgmt, 0, 24);
 655         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 656         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 657         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 658         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 659                                            IEEE80211_STYPE_DEAUTH);
 660         skb_put(skb, 2);
 661         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 662
 663         ieee80211_sta_tx(dev, skb, 0);
 664 }
 665
 666
 667 static void ieee80211_send_disassoc(struct net_device *dev,
 668                                     struct ieee80211_if_sta *ifsta, u16 reason)
 669 {
 670         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 671         struct sk_buff *skb;
 672         struct ieee80211_mgmt *mgmt;
 673
 674         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 675         if (!skb) {
 676                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 677                        "frame\n", dev->name);
 678                 return;
 679         }
 680         skb_reserve(skb, local->hw.extra_tx_headroom);
 681
 682         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 683         memset(mgmt, 0, 24);
 684         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 685         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 686         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 687         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 688                                            IEEE80211_STYPE_DISASSOC);
 689         skb_put(skb, 2);
 690         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 691
 692         ieee80211_sta_tx(dev, skb, 0);
 693 }
 694
 695
 696 static int ieee80211_privacy_mismatch(struct net_device *dev,
 697                                       struct ieee80211_if_sta *ifsta)
 698 {
 699         struct ieee80211_sta_bss *bss;
 700         int res = 0;
 701
 702         if (!ifsta || ifsta->mixed_cell ||
 703             ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
 704                 return 0;
 705
 706         bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
 707         if (!bss)
 708                 return 0;
 709
 710         if (ieee80211_sta_wep_configured(dev) !=
 711             !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
 712                 res = 1;
 713
 714         ieee80211_rx_bss_put(dev, bss);
 715
 716         return res;
 717 }
 718
 719
 720 static void ieee80211_associate(struct net_device *dev,
 721                                 struct ieee80211_if_sta *ifsta)
 722 {
 723         ifsta->assoc_tries++;
 724         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 725                 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
 726                        " timed out\n",
 727                        dev->name, MAC_ARG(ifsta->bssid));
 728                 ifsta->state = IEEE80211_DISABLED;
 729                 return;
 730         }
 731
 732         ifsta->state = IEEE80211_ASSOCIATE;
 733         printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
 734                dev->name, MAC_ARG(ifsta->bssid));
 735         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 736                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 737                        "mixed-cell disabled - abort association\n", dev->name);
 738                 ifsta->state = IEEE80211_DISABLED;
 739                 return;
 740         }
 741
 742         ieee80211_send_assoc(dev, ifsta);
 743
 744         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 745 }
 746
 747
 748 static void ieee80211_associated(struct net_device *dev,
 749                                  struct ieee80211_if_sta *ifsta)
 750 {
 751         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 752         struct sta_info *sta;
 753         int disassoc;
 754
 755         /* TODO: start monitoring current AP signal quality and number of
 756          * missed beacons. Scan other channels every now and then and search
 757          * for better APs. */
 758         /* TODO: remove expired BSSes */
 759
 760         ifsta->state = IEEE80211_ASSOCIATED;
 761
 762         sta = sta_info_get(local, ifsta->bssid);
 763         if (!sta) {
 764                 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
 765                        dev->name, MAC_ARG(ifsta->bssid));
 766                 disassoc = 1;
 767         } else {
 768                 disassoc = 0;
 769                 if (time_after(jiffies,
 770                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 771                         if (ifsta->probereq_poll) {
 772                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 773                                        "current AP " MAC_FMT " - assume out of "
 774                                        "range\n",
 775                                        dev->name, MAC_ARG(ifsta->bssid));
 776                                 disassoc = 1;
 777                                 sta_info_free(sta, 0);
 778                                 ifsta->probereq_poll = 0;
 779                         } else {
 780                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 781                                                          local->scan_ssid,
 782                                                          local->scan_ssid_len);
 783                                 ifsta->probereq_poll = 1;
 784                         }
 785                 } else {
 786                         ifsta->probereq_poll = 0;
 787                         if (time_after(jiffies, ifsta->last_probe +
 788                                        IEEE80211_PROBE_INTERVAL)) {
 789                                 ifsta->last_probe = jiffies;
 790                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 791                                                          ifsta->ssid,
 792                                                          ifsta->ssid_len);
 793                         }
 794                 }
 795                 sta_info_put(sta);
 796         }
 797         if (disassoc) {
 798                 union iwreq_data wrqu;
 799                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 800                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 801                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 802                 mod_timer(&ifsta->timer, jiffies +
 803                                       IEEE80211_MONITORING_INTERVAL + 30 * HZ);
 804         } else {
 805                 mod_timer(&ifsta->timer, jiffies +
 806                                       IEEE80211_MONITORING_INTERVAL);
 807         }
 808 }
 809
 810
 811 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 812                                      u8 *ssid, size_t ssid_len)
 813 {
 814         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 815         struct ieee80211_hw_mode *mode;
 816         struct sk_buff *skb;
 817         struct ieee80211_mgmt *mgmt;
 818         u8 *pos, *supp_rates, *esupp_rates = NULL;
 819         int i;
 820
 821         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 822         if (!skb) {
 823                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 824                        "request\n", dev->name);
 825                 return;
 826         }
 827         skb_reserve(skb, local->hw.extra_tx_headroom);
 828
 829         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 830         memset(mgmt, 0, 24);
 831         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 832                                            IEEE80211_STYPE_PROBE_REQ);
 833         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 834         if (dst) {
 835                 memcpy(mgmt->da, dst, ETH_ALEN);
 836                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 837         } else {
 838                 memset(mgmt->da, 0xff, ETH_ALEN);
 839                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 840         }
 841         pos = skb_put(skb, 2 + ssid_len);
 842         *pos++ = WLAN_EID_SSID;
 843         *pos++ = ssid_len;
 844         memcpy(pos, ssid, ssid_len);
 845
 846         supp_rates = skb_put(skb, 2);
 847         supp_rates[0] = WLAN_EID_SUPP_RATES;
 848         supp_rates[1] = 0;
 849         mode = local->oper_hw_mode;
 850         for (i = 0; i < mode->num_rates; i++) {
 851                 struct ieee80211_rate *rate = &mode->rates[i];
 852                 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
 853                         continue;
 854                 if (esupp_rates) {
 855                         pos = skb_put(skb, 1);
 856                         esupp_rates[1]++;
 857                 } else if (supp_rates[1] == 8) {
 858                         esupp_rates = skb_put(skb, 3);
 859                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 860                         esupp_rates[1] = 1;
 861                         pos = &esupp_rates[2];
 862                 } else {
 863                         pos = skb_put(skb, 1);
 864                         supp_rates[1]++;
 865                 }
 866                 if (mode->mode == MODE_ATHEROS_TURBO)
 867                         *pos = rate->rate / 10;
 868                 else
 869                         *pos = rate->rate / 5;
 870         }
 871
 872         ieee80211_sta_tx(dev, skb, 0);
 873 }
 874
 875
 876 static int ieee80211_sta_wep_configured(struct net_device *dev)
 877 {
 878         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 879         if (!sdata || !sdata->default_key ||
 880             sdata->default_key->alg != ALG_WEP)
 881                 return 0;
 882         return 1;
 883 }
 884
 885
 886 static void ieee80211_auth_completed(struct net_device *dev,
 887                                      struct ieee80211_if_sta *ifsta)
 888 {
 889         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 890         ifsta->authenticated = 1;
 891         ieee80211_associate(dev, ifsta);
 892 }
 893
 894
 895 static void ieee80211_auth_challenge(struct net_device *dev,
 896                                      struct ieee80211_if_sta *ifsta,
 897                                      struct ieee80211_mgmt *mgmt,
 898                                      size_t len)
 899 {
 900         u8 *pos;
 901         struct ieee802_11_elems elems;
 902
 903         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 904         pos = mgmt->u.auth.variable;
 905         if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
 906             == ParseFailed) {
 907                 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
 908                        dev->name);
 909                 return;
 910         }
 911         if (!elems.challenge) {
 912                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 913                        "frame\n", dev->name);
 914                 return;
 915         }
 916         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 917                             elems.challenge_len + 2, 1);
 918 }
 919
 920
 921 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
 922                                    struct ieee80211_if_sta *ifsta,
 923                                    struct ieee80211_mgmt *mgmt,
 924                                    size_t len)
 925 {
 926         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 927         u16 auth_alg, auth_transaction, status_code;
 928
 929         if (ifsta->state != IEEE80211_AUTHENTICATE &&
 930             sdata->type != IEEE80211_IF_TYPE_IBSS) {
 931                 printk(KERN_DEBUG "%s: authentication frame received from "
 932                        MAC_FMT ", but not in authenticate state - ignored\n",
 933                        dev->name, MAC_ARG(mgmt->sa));
 934                 return;
 935         }
 936
 937         if (len < 24 + 6) {
 938                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
 939                        "received from " MAC_FMT " - ignored\n",
 940                        dev->name, len, MAC_ARG(mgmt->sa));
 941                 return;
 942         }
 943
 944         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
 945             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
 946                 printk(KERN_DEBUG "%s: authentication frame received from "
 947                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
 948                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
 949                        MAC_ARG(mgmt->bssid));
 950                 return;
 951         }
 952
 953         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
 954             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
 955                 printk(KERN_DEBUG "%s: authentication frame received from "
 956                        "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
 957                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
 958                        MAC_ARG(mgmt->bssid));
 959                 return;
 960         }
 961
 962         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
 963         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
 964         status_code = le16_to_cpu(mgmt->u.auth.status_code);
 965
 966         printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
 967                "transaction=%d status=%d)\n",
 968                dev->name, MAC_ARG(mgmt->sa), auth_alg,
 969                auth_transaction, status_code);
 970
 971         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
 972                 /* IEEE 802.11 standard does not require authentication in IBSS
 973                  * networks and most implementations do not seem to use it.
 974                  * However, try to reply to authentication attempts if someone
 975                  * has actually implemented this.
 976                  * TODO: Could implement shared key authentication. */
 977                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
 978                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
 979                                "frame (alg=%d transaction=%d)\n",
 980                                dev->name, auth_alg, auth_transaction);
 981                         return;
 982                 }
 983                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
 984         }
 985
 986         if (auth_alg != ifsta->auth_alg ||
 987             auth_transaction != ifsta->auth_transaction) {
 988                 printk(KERN_DEBUG "%s: unexpected authentication frame "
 989                        "(alg=%d transaction=%d)\n",
 990                        dev->name, auth_alg, auth_transaction);
 991                 return;
 992         }
 993
 994         if (status_code != WLAN_STATUS_SUCCESS) {
 995                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
 996                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
 997                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
 998                         u8 algs[3];
 999                         const int num_algs = ARRAY_SIZE(algs);
1000                         int i, pos;
1001                         algs[0] = algs[1] = algs[2] = 0xff;
1002                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1003                                 algs[0] = WLAN_AUTH_OPEN;
1004                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1005                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1006                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1007                                 algs[2] = WLAN_AUTH_LEAP;
1008                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1009                                 pos = 0;
1010                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1011                                 pos = 1;
1012                         else
1013                                 pos = 2;
1014                         for (i = 0; i < num_algs; i++) {
1015                                 pos++;
1016                                 if (pos >= num_algs)
1017                                         pos = 0;
1018                                 if (algs[pos] == ifsta->auth_alg ||
1019                                     algs[pos] == 0xff)
1020                                         continue;
1021                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1022                                     !ieee80211_sta_wep_configured(dev))
1023                                         continue;
1024                                 ifsta->auth_alg = algs[pos];
1025                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1026                                        "next try\n",
1027                                        dev->name, ifsta->auth_alg);
1028                                 break;
1029                         }
1030                 }
1031                 return;
1032         }
1033
1034         switch (ifsta->auth_alg) {
1035         case WLAN_AUTH_OPEN:
1036         case WLAN_AUTH_LEAP:
1037                 ieee80211_auth_completed(dev, ifsta);
1038                 break;
1039         case WLAN_AUTH_SHARED_KEY:
1040                 if (ifsta->auth_transaction == 4)
1041                         ieee80211_auth_completed(dev, ifsta);
1042                 else
1043                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1044                 break;
1045         }
1046 }
1047
1048
1049 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1050                                      struct ieee80211_if_sta *ifsta,
1051                                      struct ieee80211_mgmt *mgmt,
1052                                      size_t len)
1053 {
1054         u16 reason_code;
1055
1056         if (len < 24 + 2) {
1057                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1058                        "received from " MAC_FMT " - ignored\n",
1059                        dev->name, len, MAC_ARG(mgmt->sa));
1060                 return;
1061         }
1062
1063         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1064                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1065                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1066                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1067                        MAC_ARG(mgmt->bssid));
1068                 return;
1069         }
1070
1071         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1072
1073         printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1074                " (reason=%d)\n",
1075                dev->name, MAC_ARG(mgmt->sa), reason_code);
1076
1077         if (ifsta->authenticated) {
1078                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1079         }
1080
1081         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1082             ifsta->state == IEEE80211_ASSOCIATE ||
1083             ifsta->state == IEEE80211_ASSOCIATED) {
1084                 ifsta->state = IEEE80211_AUTHENTICATE;
1085                 mod_timer(&ifsta->timer, jiffies +
1086                                       IEEE80211_RETRY_AUTH_INTERVAL);
1087         }
1088
1089         ieee80211_set_disassoc(dev, ifsta, 1);
1090         ifsta->authenticated = 0;
1091 }
1092
1093
1094 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1095                                        struct ieee80211_if_sta *ifsta,
1096                                        struct ieee80211_mgmt *mgmt,
1097                                        size_t len)
1098 {
1099         u16 reason_code;
1100
1101         if (len < 24 + 2) {
1102                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1103                        "received from " MAC_FMT " - ignored\n",
1104                        dev->name, len, MAC_ARG(mgmt->sa));
1105                 return;
1106         }
1107
1108         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1109                 printk(KERN_DEBUG "%s: disassociation frame received from "
1110                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1111                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1112                        MAC_ARG(mgmt->bssid));
1113                 return;
1114         }
1115
1116         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1117
1118         printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1119                " (reason=%d)\n",
1120                dev->name, MAC_ARG(mgmt->sa), reason_code);
1121
1122         if (ifsta->associated)
1123                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1124
1125         if (ifsta->state == IEEE80211_ASSOCIATED) {
1126                 ifsta->state = IEEE80211_ASSOCIATE;
1127                 mod_timer(&ifsta->timer, jiffies +
1128                                       IEEE80211_RETRY_AUTH_INTERVAL);
1129         }
1130
1131         ieee80211_set_disassoc(dev, ifsta, 0);
1132 }
1133
1134
1135 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1136                                          struct ieee80211_if_sta *ifsta,
1137                                          struct ieee80211_mgmt *mgmt,
1138                                          size_t len,
1139                                          int reassoc)
1140 {
1141         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1142         struct ieee80211_hw_mode *mode;
1143         struct sta_info *sta;
1144         u32 rates;
1145         u16 capab_info, status_code, aid;
1146         struct ieee802_11_elems elems;
1147         u8 *pos;
1148         int i, j;
1149
1150         /* AssocResp and ReassocResp have identical structure, so process both
1151          * of them in this function. */
1152
1153         if (ifsta->state != IEEE80211_ASSOCIATE) {
1154                 printk(KERN_DEBUG "%s: association frame received from "
1155                        MAC_FMT ", but not in associate state - ignored\n",
1156                        dev->name, MAC_ARG(mgmt->sa));
1157                 return;
1158         }
1159
1160         if (len < 24 + 6) {
1161                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1162                        "received from " MAC_FMT " - ignored\n",
1163                        dev->name, len, MAC_ARG(mgmt->sa));
1164                 return;
1165         }
1166
1167         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1168                 printk(KERN_DEBUG "%s: association frame received from "
1169                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1170                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1171                        MAC_ARG(mgmt->bssid));
1172                 return;
1173         }
1174
1175         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1176         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1177         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1178         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1179                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1180                        "set\n", dev->name, aid);
1181         aid &= ~(BIT(15) | BIT(14));
1182
1183         printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1184                "status=%d aid=%d)\n",
1185                dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1186                capab_info, status_code, aid);
1187
1188         if (status_code != WLAN_STATUS_SUCCESS) {
1189                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1190                        dev->name, status_code);
1191                 if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
1192                         ifsta->prev_bssid_set = 0;
1193                 return;
1194         }
1195
1196         pos = mgmt->u.assoc_resp.variable;
1197         if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1198             == ParseFailed) {
1199                 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1200                        dev->name);
1201                 return;
1202         }
1203
1204         if (!elems.supp_rates) {
1205                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1206                        dev->name);
1207                 return;
1208         }
1209
1210         /* it probably doesn't, but if the frame includes an ERP value then
1211          * update our stored copy */
1212         if (elems.erp_info && elems.erp_info_len >= 1) {
1213                 struct ieee80211_sta_bss *bss
1214                         = ieee80211_rx_bss_get(dev, ifsta->bssid);
1215                 if (bss) {
1216                         bss->erp_value = elems.erp_info[0];
1217                         bss->has_erp_value = 1;
1218                         ieee80211_rx_bss_put(dev, bss);
1219                 }
1220         }
1221
1222         printk(KERN_DEBUG "%s: associated\n", dev->name);
1223         ifsta->aid = aid;
1224         ifsta->ap_capab = capab_info;
1225
1226         kfree(ifsta->assocresp_ies);
1227         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1228         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1229         if (ifsta->assocresp_ies)
1230                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1231
1232         ieee80211_set_associated(dev, ifsta, 1);
1233
1234         /* Add STA entry for the AP */
1235         sta = sta_info_get(local, ifsta->bssid);
1236         if (!sta) {
1237                 struct ieee80211_sta_bss *bss;
1238                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1239                 if (!sta) {
1240                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1241                                " AP\n", dev->name);
1242                         return;
1243                 }
1244                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1245                 if (bss) {
1246                         sta->last_rssi = bss->rssi;
1247                         sta->last_signal = bss->signal;
1248                         sta->last_noise = bss->noise;
1249                         ieee80211_rx_bss_put(dev, bss);
1250                 }
1251         }
1252
1253         sta->dev = dev;
1254         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1255         sta->assoc_ap = 1;
1256
1257         rates = 0;
1258         mode = local->oper_hw_mode;
1259         for (i = 0; i < elems.supp_rates_len; i++) {
1260                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1261                 if (mode->mode == MODE_ATHEROS_TURBO)
1262                         rate *= 2;
1263                 for (j = 0; j < mode->num_rates; j++)
1264                         if (mode->rates[j].rate == rate)
1265                                 rates |= BIT(j);
1266         }
1267         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1268                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1269                 if (mode->mode == MODE_ATHEROS_TURBO)
1270                         rate *= 2;
1271                 for (j = 0; j < mode->num_rates; j++)
1272                         if (mode->rates[j].rate == rate)
1273                                 rates |= BIT(j);
1274         }
1275         sta->supp_rates = rates;
1276
1277         rate_control_rate_init(sta, local);
1278
1279         if (elems.wmm_param && ifsta->wmm_enabled) {
1280                 sta->flags |= WLAN_STA_WME;
1281                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1282                                          elems.wmm_param_len);
1283         }
1284
1285
1286         sta_info_put(sta);
1287
1288         ieee80211_associated(dev, ifsta);
1289 }
1290
1291
1292 /* Caller must hold local->sta_bss_lock */
1293 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1294                                         struct ieee80211_sta_bss *bss)
1295 {
1296         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1297         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1298         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1299 }
1300
1301
1302 /* Caller must hold local->sta_bss_lock */
1303 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1304                                         struct ieee80211_sta_bss *bss)
1305 {
1306         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1307         struct ieee80211_sta_bss *b, *prev = NULL;
1308         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1309         while (b) {
1310                 if (b == bss) {
1311                         if (!prev)
1312                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1313                                         bss->hnext;
1314                         else
1315                                 prev->hnext = bss->hnext;
1316                         break;
1317                 }
1318                 prev = b;
1319                 b = b->hnext;
1320         }
1321 }
1322
1323
1324 static struct ieee80211_sta_bss *
1325 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1326 {
1327         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1328         struct ieee80211_sta_bss *bss;
1329
1330         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1331         if (!bss)
1332                 return NULL;
1333         atomic_inc(&bss->users);
1334         atomic_inc(&bss->users);
1335         memcpy(bss->bssid, bssid, ETH_ALEN);
1336
1337         spin_lock_bh(&local->sta_bss_lock);
1338         /* TODO: order by RSSI? */
1339         list_add_tail(&bss->list, &local->sta_bss_list);
1340         __ieee80211_rx_bss_hash_add(dev, bss);
1341         spin_unlock_bh(&local->sta_bss_lock);
1342         return bss;
1343 }
1344
1345
1346 static struct ieee80211_sta_bss *
1347 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1348 {
1349         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1350         struct ieee80211_sta_bss *bss;
1351
1352         spin_lock_bh(&local->sta_bss_lock);
1353         bss = local->sta_bss_hash[STA_HASH(bssid)];
1354         while (bss) {
1355                 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1356                         atomic_inc(&bss->users);
1357                         break;
1358                 }
1359                 bss = bss->hnext;
1360         }
1361         spin_unlock_bh(&local->sta_bss_lock);
1362         return bss;
1363 }
1364
1365
1366 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1367 {
1368         kfree(bss->wpa_ie);
1369         kfree(bss->rsn_ie);
1370         kfree(bss->wmm_ie);
1371         kfree(bss);
1372 }
1373
1374
1375 static void ieee80211_rx_bss_put(struct net_device *dev,
1376                                  struct ieee80211_sta_bss *bss)
1377 {
1378         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1379         if (!atomic_dec_and_test(&bss->users))
1380                 return;
1381
1382         spin_lock_bh(&local->sta_bss_lock);
1383         __ieee80211_rx_bss_hash_del(dev, bss);
1384         list_del(&bss->list);
1385         spin_unlock_bh(&local->sta_bss_lock);
1386         ieee80211_rx_bss_free(bss);
1387 }
1388
1389
1390 void ieee80211_rx_bss_list_init(struct net_device *dev)
1391 {
1392         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1393         spin_lock_init(&local->sta_bss_lock);
1394         INIT_LIST_HEAD(&local->sta_bss_list);
1395 }
1396
1397
1398 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1399 {
1400         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1401         struct ieee80211_sta_bss *bss, *tmp;
1402
1403         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1404                 ieee80211_rx_bss_put(dev, bss);
1405 }
1406
1407
1408 static void ieee80211_rx_bss_info(struct net_device *dev,
1409                                   struct ieee80211_mgmt *mgmt,
1410                                   size_t len,
1411                                   struct ieee80211_rx_status *rx_status,
1412                                   int beacon)
1413 {
1414         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1415         struct ieee802_11_elems elems;
1416         size_t baselen;
1417         int channel, invalid = 0, clen;
1418         struct ieee80211_sta_bss *bss;
1419         struct sta_info *sta;
1420         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1421         u64 timestamp;
1422
1423         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1424                 return; /* ignore ProbeResp to foreign address */
1425
1426 #if 0
1427         printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1428                dev->name, beacon ? "Beacon" : "Probe Response",
1429                MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1430 #endif
1431
1432         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1433         if (baselen > len)
1434                 return;
1435
1436         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1437
1438         if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1439             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1440 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1441                 static unsigned long last_tsf_debug = 0;
1442                 u64 tsf;
1443                 if (local->ops->get_tsf)
1444                         tsf = local->ops->get_tsf(local_to_hw(local));
1445                 else
1446                         tsf = -1LLU;
1447                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1448                         printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1449                                MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1450                                "@%lu\n",
1451                                MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1452                                (unsigned long long)tsf,
1453                                (unsigned long long)timestamp,
1454                                (unsigned long long)(tsf - timestamp),
1455                                jiffies);
1456                         last_tsf_debug = jiffies;
1457                 }
1458 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1459         }
1460
1461         if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1462                                    &elems) == ParseFailed)
1463                 invalid = 1;
1464
1465         if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1466             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1467             (sta = sta_info_get(local, mgmt->sa))) {
1468                 struct ieee80211_hw_mode *mode;
1469                 struct ieee80211_rate *rates;
1470                 size_t num_rates;
1471                 u32 supp_rates, prev_rates;
1472                 int i, j;
1473
1474                 mode = local->sta_scanning ?
1475                        local->scan_hw_mode : local->oper_hw_mode;
1476                 rates = mode->rates;
1477                 num_rates = mode->num_rates;
1478
1479                 supp_rates = 0;
1480                 for (i = 0; i < elems.supp_rates_len +
1481                              elems.ext_supp_rates_len; i++) {
1482                         u8 rate = 0;
1483                         int own_rate;
1484                         if (i < elems.supp_rates_len)
1485                                 rate = elems.supp_rates[i];
1486                         else if (elems.ext_supp_rates)
1487                                 rate = elems.ext_supp_rates
1488                                         [i - elems.supp_rates_len];
1489                         own_rate = 5 * (rate & 0x7f);
1490                         if (mode->mode == MODE_ATHEROS_TURBO)
1491                                 own_rate *= 2;
1492                         for (j = 0; j < num_rates; j++)
1493                                 if (rates[j].rate == own_rate)
1494                                         supp_rates |= BIT(j);
1495                 }
1496
1497                 prev_rates = sta->supp_rates;
1498                 sta->supp_rates &= supp_rates;
1499                 if (sta->supp_rates == 0) {
1500                         /* No matching rates - this should not really happen.
1501                          * Make sure that at least one rate is marked
1502                          * supported to avoid issues with TX rate ctrl. */
1503                         sta->supp_rates = sdata->u.sta.supp_rates_bits;
1504                 }
1505                 if (sta->supp_rates != prev_rates) {
1506                         printk(KERN_DEBUG "%s: updated supp_rates set for "
1507                                MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1508                                "0x%x)\n",
1509                                dev->name, MAC_ARG(sta->addr), prev_rates,
1510                                supp_rates, sta->supp_rates);
1511                 }
1512                 sta_info_put(sta);
1513         }
1514
1515         if (!elems.ssid)
1516                 return;
1517
1518         if (elems.ds_params && elems.ds_params_len == 1)
1519                 channel = elems.ds_params[0];
1520         else
1521                 channel = rx_status->channel;
1522
1523         bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1524         if (!bss) {
1525                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1526                 if (!bss)
1527                         return;
1528         } else {
1529 #if 0
1530                 /* TODO: order by RSSI? */
1531                 spin_lock_bh(&local->sta_bss_lock);
1532                 list_move_tail(&bss->list, &local->sta_bss_list);
1533                 spin_unlock_bh(&local->sta_bss_lock);
1534 #endif
1535         }
1536
1537         if (bss->probe_resp && beacon) {
1538                 /* Do not allow beacon to override data from Probe Response. */
1539                 ieee80211_rx_bss_put(dev, bss);
1540                 return;
1541         }
1542
1543         /* save the ERP value so that it is available at association time */
1544         if (elems.erp_info && elems.erp_info_len >= 1) {
1545                 bss->erp_value = elems.erp_info[0];
1546                 bss->has_erp_value = 1;
1547         }
1548
1549         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1550         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1551         if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1552                 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1553                 bss->ssid_len = elems.ssid_len;
1554         }
1555
1556         bss->supp_rates_len = 0;
1557         if (elems.supp_rates) {
1558                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1559                 if (clen > elems.supp_rates_len)
1560                         clen = elems.supp_rates_len;
1561                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1562                        clen);
1563                 bss->supp_rates_len += clen;
1564         }
1565         if (elems.ext_supp_rates) {
1566                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1567                 if (clen > elems.ext_supp_rates_len)
1568                         clen = elems.ext_supp_rates_len;
1569                 memcpy(&bss->supp_rates[bss->supp_rates_len],
1570                        elems.ext_supp_rates, clen);
1571                 bss->supp_rates_len += clen;
1572         }
1573
1574         if (elems.wpa &&
1575             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1576              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1577                 kfree(bss->wpa_ie);
1578                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1579                 if (bss->wpa_ie) {
1580                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1581                         bss->wpa_ie_len = elems.wpa_len + 2;
1582                 } else
1583                         bss->wpa_ie_len = 0;
1584         } else if (!elems.wpa && bss->wpa_ie) {
1585                 kfree(bss->wpa_ie);
1586                 bss->wpa_ie = NULL;
1587                 bss->wpa_ie_len = 0;
1588         }
1589
1590         if (elems.rsn &&
1591             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1592              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1593                 kfree(bss->rsn_ie);
1594                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1595                 if (bss->rsn_ie) {
1596                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1597                         bss->rsn_ie_len = elems.rsn_len + 2;
1598                 } else
1599                         bss->rsn_ie_len = 0;
1600         } else if (!elems.rsn && bss->rsn_ie) {
1601                 kfree(bss->rsn_ie);
1602                 bss->rsn_ie = NULL;
1603                 bss->rsn_ie_len = 0;
1604         }
1605
1606         if (elems.wmm_param &&
1607             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1608              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1609                 kfree(bss->wmm_ie);
1610                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1611                 if (bss->wmm_ie) {
1612                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
1613                                elems.wmm_param_len + 2);
1614                         bss->wmm_ie_len = elems.wmm_param_len + 2;
1615                 } else
1616                         bss->wmm_ie_len = 0;
1617         } else if (!elems.wmm_param && bss->wmm_ie) {
1618                 kfree(bss->wmm_ie);
1619                 bss->wmm_ie = NULL;
1620                 bss->wmm_ie_len = 0;
1621         }
1622
1623
1624         bss->hw_mode = rx_status->phymode;
1625         bss->channel = channel;
1626         bss->freq = rx_status->freq;
1627         if (channel != rx_status->channel &&
1628             (bss->hw_mode == MODE_IEEE80211G ||
1629              bss->hw_mode == MODE_IEEE80211B) &&
1630             channel >= 1 && channel <= 14) {
1631                 static const int freq_list[] = {
1632                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
1633                         2447, 2452, 2457, 2462, 2467, 2472, 2484
1634                 };
1635                 /* IEEE 802.11g/b mode can receive packets from neighboring
1636                  * channels, so map the channel into frequency. */
1637                 bss->freq = freq_list[channel - 1];
1638         }
1639         bss->timestamp = timestamp;
1640         bss->last_update = jiffies;
1641         bss->rssi = rx_status->ssi;
1642         bss->signal = rx_status->signal;
1643         bss->noise = rx_status->noise;
1644         if (!beacon)
1645                 bss->probe_resp++;
1646         ieee80211_rx_bss_put(dev, bss);
1647 }
1648
1649
1650 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1651                                          struct ieee80211_mgmt *mgmt,
1652                                          size_t len,
1653                                          struct ieee80211_rx_status *rx_status)
1654 {
1655         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1656 }
1657
1658
1659 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1660                                      struct ieee80211_mgmt *mgmt,
1661                                      size_t len,
1662                                      struct ieee80211_rx_status *rx_status)
1663 {
1664         struct ieee80211_sub_if_data *sdata;
1665         struct ieee80211_if_sta *ifsta;
1666         size_t baselen;
1667         struct ieee802_11_elems elems;
1668
1669         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1670
1671         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1672         if (sdata->type != IEEE80211_IF_TYPE_STA)
1673                 return;
1674         ifsta = &sdata->u.sta;
1675
1676         if (!ifsta->associated ||
1677             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1678                 return;
1679
1680         /* Process beacon from the current BSS */
1681         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1682         if (baselen > len)
1683                 return;
1684
1685         if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1686                                    &elems) == ParseFailed)
1687                 return;
1688
1689         if (elems.erp_info && elems.erp_info_len >= 1)
1690                 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1691
1692         if (elems.wmm_param && ifsta->wmm_enabled) {
1693                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1694                                          elems.wmm_param_len);
1695         }
1696 }
1697
1698
1699 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1700                                         struct ieee80211_if_sta *ifsta,
1701                                         struct ieee80211_mgmt *mgmt,
1702                                         size_t len,
1703                                         struct ieee80211_rx_status *rx_status)
1704 {
1705         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1706         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1707         int tx_last_beacon;
1708         struct sk_buff *skb;
1709         struct ieee80211_mgmt *resp;
1710         u8 *pos, *end;
1711
1712         if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1713             ifsta->state != IEEE80211_IBSS_JOINED ||
1714             len < 24 + 2 || !ifsta->probe_resp)
1715                 return;
1716
1717         if (local->ops->tx_last_beacon)
1718                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1719         else
1720                 tx_last_beacon = 1;
1721
1722 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1723         printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1724                MAC_FMT " (tx_last_beacon=%d)\n",
1725                dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1726                MAC_ARG(mgmt->bssid), tx_last_beacon);
1727 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1728
1729         if (!tx_last_beacon)
1730                 return;
1731
1732         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1733             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1734                 return;
1735
1736         end = ((u8 *) mgmt) + len;
1737         pos = mgmt->u.probe_req.variable;
1738         if (pos[0] != WLAN_EID_SSID ||
1739             pos + 2 + pos[1] > end) {
1740                 if (net_ratelimit()) {
1741                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1742                                "from " MAC_FMT "\n",
1743                                dev->name, MAC_ARG(mgmt->sa));
1744                 }
1745                 return;
1746         }
1747         if (pos[1] != 0 &&
1748             (pos[1] != ifsta->ssid_len ||
1749              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1750                 /* Ignore ProbeReq for foreign SSID */
1751                 return;
1752         }
1753
1754         /* Reply with ProbeResp */
1755         skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1756         if (!skb)
1757                 return;
1758
1759         resp = (struct ieee80211_mgmt *) skb->data;
1760         memcpy(resp->da, mgmt->sa, ETH_ALEN);
1761 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1762         printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1763                dev->name, MAC_ARG(resp->da));
1764 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1765         ieee80211_sta_tx(dev, skb, 0);
1766 }
1767
1768
1769 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1770                            struct ieee80211_rx_status *rx_status)
1771 {
1772         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1773         struct ieee80211_sub_if_data *sdata;
1774         struct ieee80211_if_sta *ifsta;
1775         struct ieee80211_mgmt *mgmt;
1776         u16 fc;
1777
1778         if (skb->len < 24)
1779                 goto fail;
1780
1781         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1782         ifsta = &sdata->u.sta;
1783
1784         mgmt = (struct ieee80211_mgmt *) skb->data;
1785         fc = le16_to_cpu(mgmt->frame_control);
1786
1787         switch (fc & IEEE80211_FCTL_STYPE) {
1788         case IEEE80211_STYPE_PROBE_REQ:
1789         case IEEE80211_STYPE_PROBE_RESP:
1790         case IEEE80211_STYPE_BEACON:
1791                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1792         case IEEE80211_STYPE_AUTH:
1793         case IEEE80211_STYPE_ASSOC_RESP:
1794         case IEEE80211_STYPE_REASSOC_RESP:
1795         case IEEE80211_STYPE_DEAUTH:
1796         case IEEE80211_STYPE_DISASSOC:
1797                 skb_queue_tail(&ifsta->skb_queue, skb);
1798                 queue_work(local->hw.workqueue, &ifsta->work);
1799                 return;
1800         default:
1801                 printk(KERN_DEBUG "%s: received unknown management frame - "
1802                        "stype=%d\n", dev->name,
1803                        (fc & IEEE80211_FCTL_STYPE) >> 4);
1804                 break;
1805         }
1806
1807  fail:
1808         kfree_skb(skb);
1809 }
1810
1811
1812 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1813                                          struct sk_buff *skb)
1814 {
1815         struct ieee80211_rx_status *rx_status;
1816         struct ieee80211_sub_if_data *sdata;
1817         struct ieee80211_if_sta *ifsta;
1818         struct ieee80211_mgmt *mgmt;
1819         u16 fc;
1820
1821         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1822         ifsta = &sdata->u.sta;
1823
1824         rx_status = (struct ieee80211_rx_status *) skb->cb;
1825         mgmt = (struct ieee80211_mgmt *) skb->data;
1826         fc = le16_to_cpu(mgmt->frame_control);
1827
1828         switch (fc & IEEE80211_FCTL_STYPE) {
1829         case IEEE80211_STYPE_PROBE_REQ:
1830                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1831                                             rx_status);
1832                 break;
1833         case IEEE80211_STYPE_PROBE_RESP:
1834                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1835                 break;
1836         case IEEE80211_STYPE_BEACON:
1837                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1838                 break;
1839         case IEEE80211_STYPE_AUTH:
1840                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1841                 break;
1842         case IEEE80211_STYPE_ASSOC_RESP:
1843                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1844                 break;
1845         case IEEE80211_STYPE_REASSOC_RESP:
1846                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1847                 break;
1848         case IEEE80211_STYPE_DEAUTH:
1849                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1850                 break;
1851         case IEEE80211_STYPE_DISASSOC:
1852                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1853                 break;
1854         }
1855
1856         kfree_skb(skb);
1857 }
1858
1859
1860 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1861                            struct ieee80211_rx_status *rx_status)
1862 {
1863         struct ieee80211_mgmt *mgmt;
1864         u16 fc;
1865
1866         if (skb->len < 24) {
1867                 dev_kfree_skb(skb);
1868                 return;
1869         }
1870
1871         mgmt = (struct ieee80211_mgmt *) skb->data;
1872         fc = le16_to_cpu(mgmt->frame_control);
1873
1874         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1875                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1876                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1877                                                      skb->len, rx_status);
1878                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1879                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1880                                                  rx_status);
1881                 }
1882         }
1883
1884         dev_kfree_skb(skb);
1885 }
1886
1887
1888 static int ieee80211_sta_active_ibss(struct net_device *dev)
1889 {
1890         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1891         int active = 0;
1892         struct sta_info *sta;
1893
1894         spin_lock_bh(&local->sta_lock);
1895         list_for_each_entry(sta, &local->sta_list, list) {
1896                 if (sta->dev == dev &&
1897                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1898                                jiffies)) {
1899                         active++;
1900                         break;
1901                 }
1902         }
1903         spin_unlock_bh(&local->sta_lock);
1904
1905         return active;
1906 }
1907
1908
1909 static void ieee80211_sta_expire(struct net_device *dev)
1910 {
1911         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1912         struct sta_info *sta, *tmp;
1913
1914         spin_lock_bh(&local->sta_lock);
1915         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1916                 if (time_after(jiffies, sta->last_rx +
1917                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1918                         printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1919                                "\n", dev->name, MAC_ARG(sta->addr));
1920                         sta_info_free(sta, 1);
1921                 }
1922         spin_unlock_bh(&local->sta_lock);
1923 }
1924
1925
1926 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1927                                      struct ieee80211_if_sta *ifsta)
1928 {
1929         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1930
1931         ieee80211_sta_expire(dev);
1932         if (ieee80211_sta_active_ibss(dev))
1933                 return;
1934
1935         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1936                "IBSS networks with same SSID (merge)\n", dev->name);
1937         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1938 }
1939
1940
1941 void ieee80211_sta_timer(unsigned long data)
1942 {
1943         struct ieee80211_sub_if_data *sdata =
1944                 (struct ieee80211_sub_if_data *) data;
1945         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1946         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1947
1948         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1949         queue_work(local->hw.workqueue, &ifsta->work);
1950 }
1951
1952
1953 void ieee80211_sta_work(struct work_struct *work)
1954 {
1955         struct ieee80211_sub_if_data *sdata =
1956                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1957         struct net_device *dev = sdata->dev;
1958         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1959         struct ieee80211_if_sta *ifsta;
1960         struct sk_buff *skb;
1961
1962         if (!netif_running(dev))
1963                 return;
1964
1965         if (local->sta_scanning)
1966                 return;
1967
1968         if (sdata->type != IEEE80211_IF_TYPE_STA &&
1969             sdata->type != IEEE80211_IF_TYPE_IBSS) {
1970                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1971                        "(type=%d)\n", dev->name, sdata->type);
1972                 return;
1973         }
1974         ifsta = &sdata->u.sta;
1975
1976         while ((skb = skb_dequeue(&ifsta->skb_queue)))
1977                 ieee80211_sta_rx_queued_mgmt(dev, skb);
1978
1979         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1980             ifsta->state != IEEE80211_ASSOCIATE &&
1981             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1982                 ieee80211_sta_start_scan(dev, NULL, 0);
1983                 return;
1984         }
1985
1986         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1987                 if (ieee80211_sta_config_auth(dev, ifsta))
1988                         return;
1989                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1990         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
1991                 return;
1992
1993         switch (ifsta->state) {
1994         case IEEE80211_DISABLED:
1995                 break;
1996         case IEEE80211_AUTHENTICATE:
1997                 ieee80211_authenticate(dev, ifsta);
1998                 break;
1999         case IEEE80211_ASSOCIATE:
2000                 ieee80211_associate(dev, ifsta);
2001                 break;
2002         case IEEE80211_ASSOCIATED:
2003                 ieee80211_associated(dev, ifsta);
2004                 break;
2005         case IEEE80211_IBSS_SEARCH:
2006                 ieee80211_sta_find_ibss(dev, ifsta);
2007                 break;
2008         case IEEE80211_IBSS_JOINED:
2009                 ieee80211_sta_merge_ibss(dev, ifsta);
2010                 break;
2011         default:
2012                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2013                        ifsta->state);
2014                 break;
2015         }
2016
2017         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2018                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2019                        "mixed-cell disabled - disassociate\n", dev->name);
2020
2021                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2022                 ieee80211_set_disassoc(dev, ifsta, 0);
2023         }
2024 }
2025
2026
2027 static void ieee80211_sta_reset_auth(struct net_device *dev,
2028                                      struct ieee80211_if_sta *ifsta)
2029 {
2030         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2031
2032         if (local->ops->reset_tsf) {
2033                 /* Reset own TSF to allow time synchronization work. */
2034                 local->ops->reset_tsf(local_to_hw(local));
2035         }
2036
2037         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2038
2039
2040         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2041                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2042         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2043                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2044         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2045                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2046         else
2047                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2048         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2049                ifsta->auth_alg);
2050         ifsta->auth_transaction = -1;
2051         ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2052         netif_carrier_off(dev);
2053 }
2054
2055
2056 void ieee80211_sta_req_auth(struct net_device *dev,
2057                             struct ieee80211_if_sta *ifsta)
2058 {
2059         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2060         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2061
2062         if (sdata->type != IEEE80211_IF_TYPE_STA)
2063                 return;
2064
2065         if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2066             (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2067                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2068                 queue_work(local->hw.workqueue, &ifsta->work);
2069         }
2070 }
2071
2072 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2073                                     const char *ssid, int ssid_len)
2074 {
2075         int tmp, hidden_ssid;
2076
2077         if (!memcmp(ifsta->ssid, ssid, ssid_len))
2078                 return 1;
2079
2080         if (ifsta->auto_bssid_sel)
2081                 return 0;
2082
2083         hidden_ssid = 1;
2084         tmp = ssid_len;
2085         while (tmp--) {
2086                 if (ssid[tmp] != '\0') {
2087                         hidden_ssid = 0;
2088                         break;
2089                 }
2090         }
2091
2092         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2093                 return 1;
2094
2095         if (ssid_len == 1 && ssid[0] == ' ')
2096                 return 1;
2097
2098         return 0;
2099 }
2100
2101 static int ieee80211_sta_config_auth(struct net_device *dev,
2102                                      struct ieee80211_if_sta *ifsta)
2103 {
2104         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2105         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2106         struct ieee80211_sta_bss *bss, *selected = NULL;
2107         int top_rssi = 0, freq;
2108
2109         rtnl_lock();
2110
2111         if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2112             !ifsta->auto_ssid_sel) {
2113                 ifsta->state = IEEE80211_AUTHENTICATE;
2114                 rtnl_unlock();
2115                 ieee80211_sta_reset_auth(dev, ifsta);
2116                 return 0;
2117         }
2118
2119         spin_lock_bh(&local->sta_bss_lock);
2120         freq = local->oper_channel->freq;
2121         list_for_each_entry(bss, &local->sta_bss_list, list) {
2122                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2123                         continue;
2124
2125                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2126                     !!sdata->default_key)
2127                         continue;
2128
2129                 if (!ifsta->auto_channel_sel && bss->freq != freq)
2130                         continue;
2131
2132                 if (!ifsta->auto_bssid_sel &&
2133                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2134                         continue;
2135
2136                 if (!ifsta->auto_ssid_sel &&
2137                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2138                         continue;
2139
2140                 if (!selected || top_rssi < bss->rssi) {
2141                         selected = bss;
2142                         top_rssi = bss->rssi;
2143                 }
2144         }
2145         if (selected)
2146                 atomic_inc(&selected->users);
2147         spin_unlock_bh(&local->sta_bss_lock);
2148
2149         if (selected) {
2150                 ieee80211_set_channel(local, -1, selected->freq);
2151                 if (!ifsta->ssid_set)
2152                         ieee80211_sta_set_ssid(dev, selected->ssid,
2153                                                selected->ssid_len);
2154                 ieee80211_sta_set_bssid(dev, selected->bssid);
2155                 ieee80211_rx_bss_put(dev, selected);
2156                 ifsta->state = IEEE80211_AUTHENTICATE;
2157                 rtnl_unlock();
2158                 ieee80211_sta_reset_auth(dev, ifsta);
2159                 return 0;
2160         } else {
2161                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2162                         ieee80211_sta_start_scan(dev, NULL, 0);
2163                         ifsta->state = IEEE80211_AUTHENTICATE;
2164                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2165                 } else
2166                         ifsta->state = IEEE80211_DISABLED;
2167         }
2168         rtnl_unlock();
2169         return -1;
2170 }
2171
2172 static int ieee80211_sta_join_ibss(struct net_device *dev,
2173                                    struct ieee80211_if_sta *ifsta,
2174                                    struct ieee80211_sta_bss *bss)
2175 {
2176         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2177         int res, rates, i, j;
2178         struct sk_buff *skb;
2179         struct ieee80211_mgmt *mgmt;
2180         struct ieee80211_tx_control control;
2181         struct ieee80211_rate *rate;
2182         struct ieee80211_hw_mode *mode;
2183         struct rate_control_extra extra;
2184         u8 *pos;
2185         struct ieee80211_sub_if_data *sdata;
2186
2187         /* Remove possible STA entries from other IBSS networks. */
2188         sta_info_flush(local, NULL);
2189
2190         if (local->ops->reset_tsf) {
2191                 /* Reset own TSF to allow time synchronization work. */
2192                 local->ops->reset_tsf(local_to_hw(local));
2193         }
2194         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2195         res = ieee80211_if_config(dev);
2196         if (res)
2197                 return res;
2198
2199         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2200
2201         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2202         sdata->drop_unencrypted = bss->capability &
2203                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2204
2205         res = ieee80211_set_channel(local, -1, bss->freq);
2206
2207         if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2208                 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2209                        "(%d MHz)\n", dev->name, local->hw.conf.channel,
2210                        local->hw.conf.freq);
2211                 return -1;
2212         }
2213
2214         /* Set beacon template based on scan results */
2215         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2216         do {
2217                 if (!skb)
2218                         break;
2219
2220                 skb_reserve(skb, local->hw.extra_tx_headroom);
2221
2222                 mgmt = (struct ieee80211_mgmt *)
2223                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2224                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2225                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2226                                                    IEEE80211_STYPE_BEACON);
2227                 memset(mgmt->da, 0xff, ETH_ALEN);
2228                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2229                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2230                 mgmt->u.beacon.beacon_int =
2231                         cpu_to_le16(local->hw.conf.beacon_int);
2232                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2233
2234                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2235                 *pos++ = WLAN_EID_SSID;
2236                 *pos++ = ifsta->ssid_len;
2237                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2238
2239                 rates = bss->supp_rates_len;
2240                 if (rates > 8)
2241                         rates = 8;
2242                 pos = skb_put(skb, 2 + rates);
2243                 *pos++ = WLAN_EID_SUPP_RATES;
2244                 *pos++ = rates;
2245                 memcpy(pos, bss->supp_rates, rates);
2246
2247                 pos = skb_put(skb, 2 + 1);
2248                 *pos++ = WLAN_EID_DS_PARAMS;
2249                 *pos++ = 1;
2250                 *pos++ = bss->channel;
2251
2252                 pos = skb_put(skb, 2 + 2);
2253                 *pos++ = WLAN_EID_IBSS_PARAMS;
2254                 *pos++ = 2;
2255                 /* FIX: set ATIM window based on scan results */
2256                 *pos++ = 0;
2257                 *pos++ = 0;
2258
2259                 if (bss->supp_rates_len > 8) {
2260                         rates = bss->supp_rates_len - 8;
2261                         pos = skb_put(skb, 2 + rates);
2262                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2263                         *pos++ = rates;
2264                         memcpy(pos, &bss->supp_rates[8], rates);
2265                 }
2266
2267                 memset(&control, 0, sizeof(control));
2268                 memset(&extra, 0, sizeof(extra));
2269                 extra.mode = local->oper_hw_mode;
2270                 rate = rate_control_get_rate(local, dev, skb, &extra);
2271                 if (!rate) {
2272                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2273                                "for IBSS beacon\n", dev->name);
2274                         break;
2275                 }
2276                 control.tx_rate = (local->short_preamble &&
2277                                    (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2278                         rate->val2 : rate->val;
2279                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2280                 control.power_level = local->hw.conf.power_level;
2281                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2282                 control.retry_limit = 1;
2283
2284                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2285                 if (ifsta->probe_resp) {
2286                         mgmt = (struct ieee80211_mgmt *)
2287                                 ifsta->probe_resp->data;
2288                         mgmt->frame_control =
2289                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2290                                              IEEE80211_STYPE_PROBE_RESP);
2291                 } else {
2292                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2293                                "template for IBSS\n", dev->name);
2294                 }
2295
2296                 if (local->ops->beacon_update &&
2297                     local->ops->beacon_update(local_to_hw(local),
2298                                              skb, &control) == 0) {
2299                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2300                                "template based on scan results\n", dev->name);
2301                         skb = NULL;
2302                 }
2303
2304                 rates = 0;
2305                 mode = local->oper_hw_mode;
2306                 for (i = 0; i < bss->supp_rates_len; i++) {
2307                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2308                         if (mode->mode == MODE_ATHEROS_TURBO)
2309                                 bitrate *= 2;
2310                         for (j = 0; j < mode->num_rates; j++)
2311                                 if (mode->rates[j].rate == bitrate)
2312                                         rates |= BIT(j);
2313                 }
2314                 ifsta->supp_rates_bits = rates;
2315         } while (0);
2316
2317         if (skb) {
2318                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2319                        "template\n", dev->name);
2320                 dev_kfree_skb(skb);
2321         }
2322
2323         ifsta->state = IEEE80211_IBSS_JOINED;
2324         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2325
2326         ieee80211_rx_bss_put(dev, bss);
2327
2328         return res;
2329 }
2330
2331
2332 static int ieee80211_sta_create_ibss(struct net_device *dev,
2333                                      struct ieee80211_if_sta *ifsta)
2334 {
2335         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2336         struct ieee80211_sta_bss *bss;
2337         struct ieee80211_sub_if_data *sdata;
2338         struct ieee80211_hw_mode *mode;
2339         u8 bssid[ETH_ALEN], *pos;
2340         int i;
2341
2342 #if 0
2343         /* Easier testing, use fixed BSSID. */
2344         memset(bssid, 0xfe, ETH_ALEN);
2345 #else
2346         /* Generate random, not broadcast, locally administered BSSID. Mix in
2347          * own MAC address to make sure that devices that do not have proper
2348          * random number generator get different BSSID. */
2349         get_random_bytes(bssid, ETH_ALEN);
2350         for (i = 0; i < ETH_ALEN; i++)
2351                 bssid[i] ^= dev->dev_addr[i];
2352         bssid[0] &= ~0x01;
2353         bssid[0] |= 0x02;
2354 #endif
2355
2356         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2357                dev->name, MAC_ARG(bssid));
2358
2359         bss = ieee80211_rx_bss_add(dev, bssid);
2360         if (!bss)
2361                 return -ENOMEM;
2362
2363         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2364         mode = local->oper_hw_mode;
2365
2366         if (local->hw.conf.beacon_int == 0)
2367                 local->hw.conf.beacon_int = 100;
2368         bss->beacon_int = local->hw.conf.beacon_int;
2369         bss->hw_mode = local->hw.conf.phymode;
2370         bss->channel = local->hw.conf.channel;
2371         bss->freq = local->hw.conf.freq;
2372         bss->last_update = jiffies;
2373         bss->capability = WLAN_CAPABILITY_IBSS;
2374         if (sdata->default_key) {
2375                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2376         } else
2377                 sdata->drop_unencrypted = 0;
2378         bss->supp_rates_len = mode->num_rates;
2379         pos = bss->supp_rates;
2380         for (i = 0; i < mode->num_rates; i++) {
2381                 int rate = mode->rates[i].rate;
2382                 if (mode->mode == MODE_ATHEROS_TURBO)
2383                         rate /= 2;
2384                 *pos++ = (u8) (rate / 5);
2385         }
2386
2387         return ieee80211_sta_join_ibss(dev, ifsta, bss);
2388 }
2389
2390
2391 static int ieee80211_sta_find_ibss(struct net_device *dev,
2392                                    struct ieee80211_if_sta *ifsta)
2393 {
2394         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2395         struct ieee80211_sta_bss *bss;
2396         int found = 0;
2397         u8 bssid[ETH_ALEN];
2398         int active_ibss;
2399
2400         if (ifsta->ssid_len == 0)
2401                 return -EINVAL;
2402
2403         active_ibss = ieee80211_sta_active_ibss(dev);
2404 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2405         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2406                dev->name, active_ibss);
2407 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2408         spin_lock_bh(&local->sta_bss_lock);
2409         list_for_each_entry(bss, &local->sta_bss_list, list) {
2410                 if (ifsta->ssid_len != bss->ssid_len ||
2411                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2412                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
2413                         continue;
2414 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2415                 printk(KERN_DEBUG "   bssid=" MAC_FMT " found\n",
2416                        MAC_ARG(bss->bssid));
2417 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2418                 memcpy(bssid, bss->bssid, ETH_ALEN);
2419                 found = 1;
2420                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2421                         break;
2422         }
2423         spin_unlock_bh(&local->sta_bss_lock);
2424
2425 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2426         printk(KERN_DEBUG "   sta_find_ibss: selected " MAC_FMT " current "
2427                MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2428 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2429         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2430             (bss = ieee80211_rx_bss_get(dev, bssid))) {
2431                 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2432                        " based on configured SSID\n",
2433                        dev->name, MAC_ARG(bssid));
2434                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2435         }
2436 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2437         printk(KERN_DEBUG "   did not try to join ibss\n");
2438 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2439
2440         /* Selected IBSS not found in current scan results - try to scan */
2441         if (ifsta->state == IEEE80211_IBSS_JOINED &&
2442             !ieee80211_sta_active_ibss(dev)) {
2443                 mod_timer(&ifsta->timer, jiffies +
2444                                       IEEE80211_IBSS_MERGE_INTERVAL);
2445         } else if (time_after(jiffies, local->last_scan_completed +
2446                               IEEE80211_SCAN_INTERVAL)) {
2447                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2448                        "join\n", dev->name);
2449                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2450                                               ifsta->ssid_len);
2451         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2452                 int interval = IEEE80211_SCAN_INTERVAL;
2453
2454                 if (time_after(jiffies, ifsta->ibss_join_req +
2455                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
2456                         if (ifsta->create_ibss &&
2457                             local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2458                                 return ieee80211_sta_create_ibss(dev, ifsta);
2459                         if (ifsta->create_ibss) {
2460                                 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2461                                        " configured channel %d (%d MHz)\n",
2462                                        dev->name, local->hw.conf.channel,
2463                                        local->hw.conf.freq);
2464                         }
2465
2466                         /* No IBSS found - decrease scan interval and continue
2467                          * scanning. */
2468                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
2469                 }
2470
2471                 ifsta->state = IEEE80211_IBSS_SEARCH;
2472                 mod_timer(&ifsta->timer, jiffies + interval);
2473                 return 0;
2474         }
2475
2476         return 0;
2477 }
2478
2479
2480 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2481 {
2482         struct ieee80211_sub_if_data *sdata;
2483         struct ieee80211_if_sta *ifsta;
2484         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2485
2486         if (len > IEEE80211_MAX_SSID_LEN)
2487                 return -EINVAL;
2488
2489         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2490          * not defined. */
2491         if (local->ops->conf_tx) {
2492                 struct ieee80211_tx_queue_params qparam;
2493                 int i;
2494
2495                 memset(&qparam, 0, sizeof(qparam));
2496                 /* TODO: are these ok defaults for all hw_modes? */
2497                 qparam.aifs = 2;
2498                 qparam.cw_min =
2499                         local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2500                 qparam.cw_max = 1023;
2501                 qparam.burst_time = 0;
2502                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2503                 {
2504                         local->ops->conf_tx(local_to_hw(local),
2505                                            i + IEEE80211_TX_QUEUE_DATA0,
2506                                            &qparam);
2507                 }
2508                 /* IBSS uses different parameters for Beacon sending */
2509                 qparam.cw_min++;
2510                 qparam.cw_min *= 2;
2511                 qparam.cw_min--;
2512                 local->ops->conf_tx(local_to_hw(local),
2513                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
2514         }
2515
2516         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2517         ifsta = &sdata->u.sta;
2518
2519         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2520                 ifsta->prev_bssid_set = 0;
2521         memcpy(ifsta->ssid, ssid, len);
2522         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2523         ifsta->ssid_len = len;
2524
2525         ifsta->ssid_set = len ? 1 : 0;
2526         if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2527                 ifsta->ibss_join_req = jiffies;
2528                 ifsta->state = IEEE80211_IBSS_SEARCH;
2529                 return ieee80211_sta_find_ibss(dev, ifsta);
2530         }
2531         return 0;
2532 }
2533
2534
2535 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2536 {
2537         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2538         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2539         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2540         *len = ifsta->ssid_len;
2541         return 0;
2542 }
2543
2544
2545 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2546 {
2547         struct ieee80211_sub_if_data *sdata;
2548         struct ieee80211_if_sta *ifsta;
2549         int res;
2550
2551         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2552         ifsta = &sdata->u.sta;
2553
2554         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2555                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2556                 res = ieee80211_if_config(dev);
2557                 if (res) {
2558                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2559                                "the low-level driver\n", dev->name);
2560                         return res;
2561                 }
2562         }
2563
2564         if (!is_valid_ether_addr(bssid))
2565                 ifsta->bssid_set = 0;
2566         else
2567                 ifsta->bssid_set = 1;
2568         return 0;
2569 }
2570
2571
2572 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2573                                     struct ieee80211_sub_if_data *sdata,
2574                                     int powersave)
2575 {
2576         struct sk_buff *skb;
2577         struct ieee80211_hdr *nullfunc;
2578         u16 fc;
2579
2580         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2581         if (!skb) {
2582                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2583                        "frame\n", sdata->dev->name);
2584                 return;
2585         }
2586         skb_reserve(skb, local->hw.extra_tx_headroom);
2587
2588         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2589         memset(nullfunc, 0, 24);
2590         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2591              IEEE80211_FCTL_TODS;
2592         if (powersave)
2593                 fc |= IEEE80211_FCTL_PM;
2594         nullfunc->frame_control = cpu_to_le16(fc);
2595         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2596         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2597         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2598
2599         ieee80211_sta_tx(sdata->dev, skb, 0);
2600 }
2601
2602
2603 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2604 {
2605         struct ieee80211_local *local = hw_to_local(hw);
2606         struct net_device *dev = local->scan_dev;
2607         struct ieee80211_sub_if_data *sdata;
2608         union iwreq_data wrqu;
2609
2610         local->last_scan_completed = jiffies;
2611         wmb();
2612         local->sta_scanning = 0;
2613
2614         if (ieee80211_hw_config(local))
2615                 printk(KERN_DEBUG "%s: failed to restore operational"
2616                        "channel after scan\n", dev->name);
2617
2618         if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2619             ieee80211_if_config(dev))
2620                 printk(KERN_DEBUG "%s: failed to restore operational"
2621                        "BSSID after scan\n", dev->name);
2622
2623         memset(&wrqu, 0, sizeof(wrqu));
2624         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2625
2626         read_lock(&local->sub_if_lock);
2627         list_for_each_entry(sdata, &local->sub_if_list, list) {
2628
2629                 /* No need to wake the master device. */
2630                 if (sdata->dev == local->mdev)
2631                         continue;
2632
2633                 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2634                         if (sdata->u.sta.associated)
2635                                 ieee80211_send_nullfunc(local, sdata, 0);
2636                         ieee80211_sta_timer((unsigned long)sdata);
2637                 }
2638
2639                 netif_wake_queue(sdata->dev);
2640         }
2641         read_unlock(&local->sub_if_lock);
2642
2643         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2644         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2645                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2646                 if (!ifsta->bssid_set ||
2647                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
2648                     !ieee80211_sta_active_ibss(dev)))
2649                         ieee80211_sta_find_ibss(dev, ifsta);
2650         }
2651 }
2652 EXPORT_SYMBOL(ieee80211_scan_completed);
2653
2654 void ieee80211_sta_scan_work(struct work_struct *work)
2655 {
2656         struct ieee80211_local *local =
2657                 container_of(work, struct ieee80211_local, scan_work.work);
2658         struct net_device *dev = local->scan_dev;
2659         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2660         struct ieee80211_hw_mode *mode;
2661         struct ieee80211_channel *chan;
2662         int skip;
2663         unsigned long next_delay = 0;
2664
2665         if (!local->sta_scanning)
2666                 return;
2667
2668         switch (local->scan_state) {
2669         case SCAN_SET_CHANNEL:
2670                 mode = local->scan_hw_mode;
2671                 if (local->scan_hw_mode->list.next == &local->modes_list &&
2672                     local->scan_channel_idx >= mode->num_channels) {
2673                         ieee80211_scan_completed(local_to_hw(local));
2674                         return;
2675                 }
2676                 skip = !(local->enabled_modes & (1 << mode->mode));
2677                 chan = &mode->channels[local->scan_channel_idx];
2678                 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2679                     (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2680                      !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2681                     (local->hw_modes & local->enabled_modes &
2682                      (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2683                         skip = 1;
2684
2685                 if (!skip) {
2686 #if 0
2687                         printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2688                                dev->name, chan->chan, chan->freq);
2689 #endif
2690
2691                         local->scan_channel = chan;
2692                         if (ieee80211_hw_config(local)) {
2693                                 printk(KERN_DEBUG "%s: failed to set channel "
2694                                        "%d (%d MHz) for scan\n", dev->name,
2695                                        chan->chan, chan->freq);
2696                                 skip = 1;
2697                         }
2698                 }
2699
2700                 local->scan_channel_idx++;
2701                 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2702                         if (local->scan_hw_mode->list.next != &local->modes_list) {
2703                                 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2704                                                                  struct ieee80211_hw_mode,
2705                                                                  list);
2706                                 local->scan_channel_idx = 0;
2707                         }
2708                 }
2709
2710                 if (skip)
2711                         break;
2712
2713                 next_delay = IEEE80211_PROBE_DELAY +
2714                              usecs_to_jiffies(local->hw.channel_change_time);
2715                 local->scan_state = SCAN_SEND_PROBE;
2716                 break;
2717         case SCAN_SEND_PROBE:
2718                 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2719                         ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2720                                                  local->scan_ssid_len);
2721                         next_delay = IEEE80211_CHANNEL_TIME;
2722                 } else
2723                         next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2724                 local->scan_state = SCAN_SET_CHANNEL;
2725                 break;
2726         }
2727
2728         if (local->sta_scanning)
2729                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2730                                    next_delay);
2731 }
2732
2733
2734 static int ieee80211_sta_start_scan(struct net_device *dev,
2735                                     u8 *ssid, size_t ssid_len)
2736 {
2737         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2738         struct ieee80211_sub_if_data *sdata;
2739
2740         if (ssid_len > IEEE80211_MAX_SSID_LEN)
2741                 return -EINVAL;
2742
2743         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
2744          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2745          * BSSID: MACAddress
2746          * SSID
2747          * ScanType: ACTIVE, PASSIVE
2748          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2749          *    a Probe frame during active scanning
2750          * ChannelList
2751          * MinChannelTime (>= ProbeDelay), in TU
2752          * MaxChannelTime: (>= MinChannelTime), in TU
2753          */
2754
2755          /* MLME-SCAN.confirm
2756           * BSSDescriptionSet
2757           * ResultCode: SUCCESS, INVALID_PARAMETERS
2758          */
2759
2760         if (local->sta_scanning) {
2761                 if (local->scan_dev == dev)
2762                         return 0;
2763                 return -EBUSY;
2764         }
2765
2766         if (local->ops->hw_scan) {
2767                 int rc = local->ops->hw_scan(local_to_hw(local),
2768                                             ssid, ssid_len);
2769                 if (!rc) {
2770                         local->sta_scanning = 1;
2771                         local->scan_dev = dev;
2772                 }
2773                 return rc;
2774         }
2775
2776         local->sta_scanning = 1;
2777
2778         read_lock(&local->sub_if_lock);
2779         list_for_each_entry(sdata, &local->sub_if_list, list) {
2780
2781                 /* Don't stop the master interface, otherwise we can't transmit
2782                  * probes! */
2783                 if (sdata->dev == local->mdev)
2784                         continue;
2785
2786                 netif_stop_queue(sdata->dev);
2787                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2788                     sdata->u.sta.associated)
2789                         ieee80211_send_nullfunc(local, sdata, 1);
2790         }
2791         read_unlock(&local->sub_if_lock);
2792
2793         if (ssid) {
2794                 local->scan_ssid_len = ssid_len;
2795                 memcpy(local->scan_ssid, ssid, ssid_len);
2796         } else
2797                 local->scan_ssid_len = 0;
2798         local->scan_state = SCAN_SET_CHANNEL;
2799         local->scan_hw_mode = list_entry(local->modes_list.next,
2800                                          struct ieee80211_hw_mode,
2801                                          list);
2802         local->scan_channel_idx = 0;
2803         local->scan_dev = dev;
2804
2805         if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2806             ieee80211_if_config(dev))
2807                 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2808                        dev->name);
2809
2810         /* TODO: start scan as soon as all nullfunc frames are ACKed */
2811         queue_delayed_work(local->hw.workqueue, &local->scan_work,
2812                            IEEE80211_CHANNEL_TIME);
2813
2814         return 0;
2815 }
2816
2817
2818 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2819 {
2820         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2821         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2822         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2823
2824         if (sdata->type != IEEE80211_IF_TYPE_STA)
2825                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2826
2827         if (local->sta_scanning) {
2828                 if (local->scan_dev == dev)
2829                         return 0;
2830                 return -EBUSY;
2831         }
2832
2833         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2834         queue_work(local->hw.workqueue, &ifsta->work);
2835         return 0;
2836 }
2837
2838 static char *
2839 ieee80211_sta_scan_result(struct net_device *dev,
2840                           struct ieee80211_sta_bss *bss,
2841                           char *current_ev, char *end_buf)
2842 {
2843         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2844         struct iw_event iwe;
2845
2846         if (time_after(jiffies,
2847                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2848                 return current_ev;
2849
2850         if (!(local->enabled_modes & (1 << bss->hw_mode)))
2851                 return current_ev;
2852
2853         if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2854             !bss->wpa_ie && !bss->rsn_ie)
2855                 return current_ev;
2856
2857         if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2858             (local->scan_ssid_len != bss->ssid_len ||
2859              memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2860                 return current_ev;
2861
2862         memset(&iwe, 0, sizeof(iwe));
2863         iwe.cmd = SIOCGIWAP;
2864         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2865         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2866         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2867                                           IW_EV_ADDR_LEN);
2868
2869         memset(&iwe, 0, sizeof(iwe));
2870         iwe.cmd = SIOCGIWESSID;
2871         iwe.u.data.length = bss->ssid_len;
2872         iwe.u.data.flags = 1;
2873         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2874                                           bss->ssid);
2875
2876         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2877                 memset(&iwe, 0, sizeof(iwe));
2878                 iwe.cmd = SIOCGIWMODE;
2879                 if (bss->capability & WLAN_CAPABILITY_ESS)
2880                         iwe.u.mode = IW_MODE_MASTER;
2881                 else
2882                         iwe.u.mode = IW_MODE_ADHOC;
2883                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2884                                                   IW_EV_UINT_LEN);
2885         }
2886
2887         memset(&iwe, 0, sizeof(iwe));
2888         iwe.cmd = SIOCGIWFREQ;
2889         iwe.u.freq.m = bss->channel;
2890         iwe.u.freq.e = 0;
2891         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2892                                           IW_EV_FREQ_LEN);
2893         iwe.u.freq.m = bss->freq * 100000;
2894         iwe.u.freq.e = 1;
2895         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2896                                           IW_EV_FREQ_LEN);
2897
2898         memset(&iwe, 0, sizeof(iwe));
2899         iwe.cmd = IWEVQUAL;
2900         iwe.u.qual.qual = bss->signal;
2901         iwe.u.qual.level = bss->rssi;
2902         iwe.u.qual.noise = bss->noise;
2903         iwe.u.qual.updated = local->wstats_flags;
2904         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2905                                           IW_EV_QUAL_LEN);
2906
2907         memset(&iwe, 0, sizeof(iwe));
2908         iwe.cmd = SIOCGIWENCODE;
2909         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2910                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2911         else
2912                 iwe.u.data.flags = IW_ENCODE_DISABLED;
2913         iwe.u.data.length = 0;
2914         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2915
2916         if (bss && bss->wpa_ie) {
2917                 memset(&iwe, 0, sizeof(iwe));
2918                 iwe.cmd = IWEVGENIE;
2919                 iwe.u.data.length = bss->wpa_ie_len;
2920                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2921                                                   bss->wpa_ie);
2922         }
2923
2924         if (bss && bss->rsn_ie) {
2925                 memset(&iwe, 0, sizeof(iwe));
2926                 iwe.cmd = IWEVGENIE;
2927                 iwe.u.data.length = bss->rsn_ie_len;
2928                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2929                                                   bss->rsn_ie);
2930         }
2931
2932         if (bss && bss->supp_rates_len > 0) {
2933                 /* display all supported rates in readable format */
2934                 char *p = current_ev + IW_EV_LCP_LEN;
2935                 int i;
2936
2937                 memset(&iwe, 0, sizeof(iwe));
2938                 iwe.cmd = SIOCGIWRATE;
2939                 /* Those two flags are ignored... */
2940                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2941
2942                 for (i = 0; i < bss->supp_rates_len; i++) {
2943                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
2944                                                         0x7f) * 500000);
2945                         p = iwe_stream_add_value(current_ev, p,
2946                                         end_buf, &iwe, IW_EV_PARAM_LEN);
2947                 }
2948                 current_ev = p;
2949         }
2950
2951         if (bss) {
2952                 char *buf;
2953                 buf = kmalloc(30, GFP_ATOMIC);
2954                 if (buf) {
2955                         memset(&iwe, 0, sizeof(iwe));
2956                         iwe.cmd = IWEVCUSTOM;
2957                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2958                         iwe.u.data.length = strlen(buf);
2959                         current_ev = iwe_stream_add_point(current_ev, end_buf,
2960                                                           &iwe, buf);
2961                         kfree(buf);
2962                 }
2963         }
2964
2965         do {
2966                 char *buf;
2967
2968                 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2969                         break;
2970
2971                 buf = kmalloc(100, GFP_ATOMIC);
2972                 if (!buf)
2973                         break;
2974
2975                 memset(&iwe, 0, sizeof(iwe));
2976                 iwe.cmd = IWEVCUSTOM;
2977                 sprintf(buf, "bcn_int=%d", bss->beacon_int);
2978                 iwe.u.data.length = strlen(buf);
2979                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2980                                                   buf);
2981
2982                 memset(&iwe, 0, sizeof(iwe));
2983                 iwe.cmd = IWEVCUSTOM;
2984                 sprintf(buf, "capab=0x%04x", bss->capability);
2985                 iwe.u.data.length = strlen(buf);
2986                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2987                                                   buf);
2988
2989                 kfree(buf);
2990                 break;
2991         } while (0);
2992
2993         return current_ev;
2994 }
2995
2996
2997 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
2998 {
2999         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3000         char *current_ev = buf;
3001         char *end_buf = buf + len;
3002         struct ieee80211_sta_bss *bss;
3003
3004         spin_lock_bh(&local->sta_bss_lock);
3005         list_for_each_entry(bss, &local->sta_bss_list, list) {
3006                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3007                         spin_unlock_bh(&local->sta_bss_lock);
3008                         return -E2BIG;
3009                 }
3010                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3011                                                        end_buf);
3012         }
3013         spin_unlock_bh(&local->sta_bss_lock);
3014         return current_ev - buf;
3015 }
3016
3017
3018 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3019 {
3020         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3021         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3022         kfree(ifsta->extra_ie);
3023         if (len == 0) {
3024                 ifsta->extra_ie = NULL;
3025                 ifsta->extra_ie_len = 0;
3026                 return 0;
3027         }
3028         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3029         if (!ifsta->extra_ie) {
3030                 ifsta->extra_ie_len = 0;
3031                 return -ENOMEM;
3032         }
3033         memcpy(ifsta->extra_ie, ie, len);
3034         ifsta->extra_ie_len = len;
3035         return 0;
3036 }
3037
3038
3039 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3040                                          struct sk_buff *skb, u8 *bssid,
3041                                          u8 *addr)
3042 {
3043         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3044         struct sta_info *sta;
3045         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3046
3047         /* TODO: Could consider removing the least recently used entry and
3048          * allow new one to be added. */
3049         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3050                 if (net_ratelimit()) {
3051                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3052                                "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3053                 }
3054                 return NULL;
3055         }
3056
3057         printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3058                local->mdev->name, MAC_ARG(addr), dev->name);
3059
3060         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3061         if (!sta)
3062                 return NULL;
3063
3064         sta->supp_rates = sdata->u.sta.supp_rates_bits;
3065
3066         rate_control_rate_init(sta, local);
3067
3068         return sta; /* caller will call sta_info_put() */
3069 }
3070
3071
3072 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3073 {
3074         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3075         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3076
3077         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3078                dev->name, reason);
3079
3080         if (sdata->type != IEEE80211_IF_TYPE_STA &&
3081             sdata->type != IEEE80211_IF_TYPE_IBSS)
3082                 return -EINVAL;
3083
3084         ieee80211_send_deauth(dev, ifsta, reason);
3085         ieee80211_set_disassoc(dev, ifsta, 1);
3086         return 0;
3087 }
3088
3089
3090 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3091 {
3092         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3093         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3094
3095         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3096                dev->name, reason);
3097
3098         if (sdata->type != IEEE80211_IF_TYPE_STA)
3099                 return -EINVAL;
3100
3101         if (!ifsta->associated)
3102                 return -1;
3103
3104         ieee80211_send_disassoc(dev, ifsta, reason);
3105         ieee80211_set_disassoc(dev, ifsta, 0);
3106         return 0;
3107 }