net/mac80211/ieee80211_sta.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <net/iw_handler.h>
  28 #include <asm/types.h>
  29
  30 #include <net/mac80211.h>
  31 #include "ieee80211_i.h"
  32 #include "ieee80211_rate.h"
  33 #include "hostapd_ioctl.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  36 #define IEEE80211_AUTH_MAX_TRIES 3
  37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  38 #define IEEE80211_ASSOC_MAX_TRIES 3
  39 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  40 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  41 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  42 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  43 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  44 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  45
  46 #define IEEE80211_PROBE_DELAY (HZ / 33)
  47 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  48 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  49 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  50 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  51 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  52
  53 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  54
  55
  56 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  57
  58 #define ERP_INFO_USE_PROTECTION BIT(1)
  59
  60 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  61                                      u8 *ssid, size_t ssid_len);
  62 static struct ieee80211_sta_bss *
  63 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
  64                      u8 *ssid, u8 ssid_len);
  65 static void ieee80211_rx_bss_put(struct net_device *dev,
  66                                  struct ieee80211_sta_bss *bss);
  67 static int ieee80211_sta_find_ibss(struct net_device *dev,
  68                                    struct ieee80211_if_sta *ifsta);
  69 static int ieee80211_sta_wep_configured(struct net_device *dev);
  70 static int ieee80211_sta_start_scan(struct net_device *dev,
  71                                     u8 *ssid, size_t ssid_len);
  72 static int ieee80211_sta_config_auth(struct net_device *dev,
  73                                      struct ieee80211_if_sta *ifsta);
  74
  75
  76 /* Parsed Information Elements */
  77 struct ieee802_11_elems {
  78         /* pointers to IEs */
  79         u8 *ssid;
  80         u8 *supp_rates;
  81         u8 *fh_params;
  82         u8 *ds_params;
  83         u8 *cf_params;
  84         u8 *tim;
  85         u8 *ibss_params;
  86         u8 *challenge;
  87         u8 *wpa;
  88         u8 *rsn;
  89         u8 *erp_info;
  90         u8 *ext_supp_rates;
  91         u8 *wmm_info;
  92         u8 *wmm_param;
  93
  94         /* length of them, respectively */
  95         u8 ssid_len;
  96         u8 supp_rates_len;
  97         u8 fh_params_len;
  98         u8 ds_params_len;
  99         u8 cf_params_len;
 100         u8 tim_len;
 101         u8 ibss_params_len;
 102         u8 challenge_len;
 103         u8 wpa_len;
 104         u8 rsn_len;
 105         u8 erp_info_len;
 106         u8 ext_supp_rates_len;
 107         u8 wmm_info_len;
 108         u8 wmm_param_len;
 109 };
 110
 111 static void ieee802_11_parse_elems(u8 *start, size_t len,
 112                                    struct ieee802_11_elems *elems)
 113 {
 114         size_t left = len;
 115         u8 *pos = start;
 116
 117         memset(elems, 0, sizeof(*elems));
 118
 119         while (left >= 2) {
 120                 u8 id, elen;
 121
 122                 id = *pos++;
 123                 elen = *pos++;
 124                 left -= 2;
 125
 126                 if (elen > left)
 127                         return;
 128
 129                 switch (id) {
 130                 case WLAN_EID_SSID:
 131                         elems->ssid = pos;
 132                         elems->ssid_len = elen;
 133                         break;
 134                 case WLAN_EID_SUPP_RATES:
 135                         elems->supp_rates = pos;
 136                         elems->supp_rates_len = elen;
 137                         break;
 138                 case WLAN_EID_FH_PARAMS:
 139                         elems->fh_params = pos;
 140                         elems->fh_params_len = elen;
 141                         break;
 142                 case WLAN_EID_DS_PARAMS:
 143                         elems->ds_params = pos;
 144                         elems->ds_params_len = elen;
 145                         break;
 146                 case WLAN_EID_CF_PARAMS:
 147                         elems->cf_params = pos;
 148                         elems->cf_params_len = elen;
 149                         break;
 150                 case WLAN_EID_TIM:
 151                         elems->tim = pos;
 152                         elems->tim_len = elen;
 153                         break;
 154                 case WLAN_EID_IBSS_PARAMS:
 155                         elems->ibss_params = pos;
 156                         elems->ibss_params_len = elen;
 157                         break;
 158                 case WLAN_EID_CHALLENGE:
 159                         elems->challenge = pos;
 160                         elems->challenge_len = elen;
 161                         break;
 162                 case WLAN_EID_WPA:
 163                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 164                             pos[2] == 0xf2) {
 165                                 /* Microsoft OUI (00:50:F2) */
 166                                 if (pos[3] == 1) {
 167                                         /* OUI Type 1 - WPA IE */
 168                                         elems->wpa = pos;
 169                                         elems->wpa_len = elen;
 170                                 } else if (elen >= 5 && pos[3] == 2) {
 171                                         if (pos[4] == 0) {
 172                                                 elems->wmm_info = pos;
 173                                                 elems->wmm_info_len = elen;
 174                                         } else if (pos[4] == 1) {
 175                                                 elems->wmm_param = pos;
 176                                                 elems->wmm_param_len = elen;
 177                                         }
 178                                 }
 179                         }
 180                         break;
 181                 case WLAN_EID_RSN:
 182                         elems->rsn = pos;
 183                         elems->rsn_len = elen;
 184                         break;
 185                 case WLAN_EID_ERP_INFO:
 186                         elems->erp_info = pos;
 187                         elems->erp_info_len = elen;
 188                         break;
 189                 case WLAN_EID_EXT_SUPP_RATES:
 190                         elems->ext_supp_rates = pos;
 191                         elems->ext_supp_rates_len = elen;
 192                         break;
 193                 default:
 194                         break;
 195                 }
 196
 197                 left -= elen;
 198                 pos += elen;
 199         }
 200 }
 201
 202
 203 static int ecw2cw(int ecw)
 204 {
 205         int cw = 1;
 206         while (ecw > 0) {
 207                 cw <<= 1;
 208                 ecw--;
 209         }
 210         return cw - 1;
 211 }
 212
 213
 214 static void ieee80211_sta_wmm_params(struct net_device *dev,
 215                                      struct ieee80211_if_sta *ifsta,
 216                                      u8 *wmm_param, size_t wmm_param_len)
 217 {
 218         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 219         struct ieee80211_tx_queue_params params;
 220         size_t left;
 221         int count;
 222         u8 *pos;
 223
 224         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 225                 return;
 226         count = wmm_param[6] & 0x0f;
 227         if (count == ifsta->wmm_last_param_set)
 228                 return;
 229         ifsta->wmm_last_param_set = count;
 230
 231         pos = wmm_param + 8;
 232         left = wmm_param_len - 8;
 233
 234         memset(&params, 0, sizeof(params));
 235
 236         if (!local->ops->conf_tx)
 237                 return;
 238
 239         local->wmm_acm = 0;
 240         for (; left >= 4; left -= 4, pos += 4) {
 241                 int aci = (pos[0] >> 5) & 0x03;
 242                 int acm = (pos[0] >> 4) & 0x01;
 243                 int queue;
 244
 245                 switch (aci) {
 246                 case 1:
 247                         queue = IEEE80211_TX_QUEUE_DATA3;
 248                         if (acm) {
 249                                 local->wmm_acm |= BIT(0) | BIT(3);
 250                         }
 251                         break;
 252                 case 2:
 253                         queue = IEEE80211_TX_QUEUE_DATA1;
 254                         if (acm) {
 255                                 local->wmm_acm |= BIT(4) | BIT(5);
 256                         }
 257                         break;
 258                 case 3:
 259                         queue = IEEE80211_TX_QUEUE_DATA0;
 260                         if (acm) {
 261                                 local->wmm_acm |= BIT(6) | BIT(7);
 262                         }
 263                         break;
 264                 case 0:
 265                 default:
 266                         queue = IEEE80211_TX_QUEUE_DATA2;
 267                         if (acm) {
 268                                 local->wmm_acm |= BIT(1) | BIT(2);
 269                         }
 270                         break;
 271                 }
 272
 273                 params.aifs = pos[0] & 0x0f;
 274                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 275                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 276                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 277                 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 278                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 279                        "cWmin=%d cWmax=%d burst=%d\n",
 280                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 281                        params.cw_max, params.burst_time);
 282                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 283                  * AC for now) */
 284                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 285                         printk(KERN_DEBUG "%s: failed to set TX queue "
 286                                "parameters for queue %d\n", dev->name, queue);
 287                 }
 288         }
 289 }
 290
 291
 292 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
 293 {
 294         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 295         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 296         int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 297
 298         if (use_protection != sdata->use_protection) {
 299                 if (net_ratelimit()) {
 300                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 301                                MAC_FMT ")\n",
 302                                dev->name,
 303                                use_protection ? "enabled" : "disabled",
 304                                MAC_ARG(ifsta->bssid));
 305                 }
 306                 sdata->use_protection = use_protection;
 307         }
 308 }
 309
 310
 311 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 312                                          struct ieee80211_if_sta *ifsta)
 313 {
 314         char *buf;
 315         size_t len;
 316         int i;
 317         union iwreq_data wrqu;
 318
 319         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 320                 return;
 321
 322         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 323                                 ifsta->assocresp_ies_len), GFP_ATOMIC);
 324         if (!buf)
 325                 return;
 326
 327         len = sprintf(buf, "ASSOCINFO(");
 328         if (ifsta->assocreq_ies) {
 329                 len += sprintf(buf + len, "ReqIEs=");
 330                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 331                         len += sprintf(buf + len, "%02x",
 332                                        ifsta->assocreq_ies[i]);
 333                 }
 334         }
 335         if (ifsta->assocresp_ies) {
 336                 if (ifsta->assocreq_ies)
 337                         len += sprintf(buf + len, " ");
 338                 len += sprintf(buf + len, "RespIEs=");
 339                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 340                         len += sprintf(buf + len, "%02x",
 341                                        ifsta->assocresp_ies[i]);
 342                 }
 343         }
 344         len += sprintf(buf + len, ")");
 345
 346         if (len > IW_CUSTOM_MAX) {
 347                 len = sprintf(buf, "ASSOCRESPIE=");
 348                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 349                         len += sprintf(buf + len, "%02x",
 350                                        ifsta->assocresp_ies[i]);
 351                 }
 352         }
 353
 354         memset(&wrqu, 0, sizeof(wrqu));
 355         wrqu.data.length = len;
 356         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 357
 358         kfree(buf);
 359 }
 360
 361
 362 static void ieee80211_set_associated(struct net_device *dev,
 363                                      struct ieee80211_if_sta *ifsta, int assoc)
 364 {
 365         union iwreq_data wrqu;
 366         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 367         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 368
 369         if (ifsta->associated == assoc)
 370                 return;
 371
 372         ifsta->associated = assoc;
 373
 374         if (assoc) {
 375                 struct ieee80211_sub_if_data *sdata;
 376                 struct ieee80211_sta_bss *bss;
 377                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 378                 if (sdata->type != IEEE80211_IF_TYPE_STA)
 379                         return;
 380
 381                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 382                                            local->hw.conf.channel,
 383                                            ifsta->ssid, ifsta->ssid_len);
 384                 if (bss) {
 385                         if (bss->has_erp_value)
 386                                 ieee80211_handle_erp_ie(dev, bss->erp_value);
 387                         ieee80211_rx_bss_put(dev, bss);
 388                 }
 389
 390                 netif_carrier_on(dev);
 391                 ifsta->prev_bssid_set = 1;
 392                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 393                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 394                 ieee80211_sta_send_associnfo(dev, ifsta);
 395         } else {
 396                 netif_carrier_off(dev);
 397                 sdata->use_protection = 0;
 398                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 399         }
 400         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 401         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 402         ifsta->last_probe = jiffies;
 403 }
 404
 405 static void ieee80211_set_disassoc(struct net_device *dev,
 406                                    struct ieee80211_if_sta *ifsta, int deauth)
 407 {
 408         if (deauth)
 409                 ifsta->auth_tries = 0;
 410         ifsta->assoc_tries = 0;
 411         ieee80211_set_associated(dev, ifsta, 0);
 412 }
 413
 414 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 415                              int encrypt)
 416 {
 417         struct ieee80211_sub_if_data *sdata;
 418         struct ieee80211_tx_packet_data *pkt_data;
 419
 420         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 421         skb->dev = sdata->local->mdev;
 422         skb_set_mac_header(skb, 0);
 423         skb_set_network_header(skb, 0);
 424         skb_set_transport_header(skb, 0);
 425
 426         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 427         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 428         pkt_data->ifindex = sdata->dev->ifindex;
 429         pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
 430         pkt_data->do_not_encrypt = !encrypt;
 431
 432         dev_queue_xmit(skb);
 433 }
 434
 435
 436 static void ieee80211_send_auth(struct net_device *dev,
 437                                 struct ieee80211_if_sta *ifsta,
 438                                 int transaction, u8 *extra, size_t extra_len,
 439                                 int encrypt)
 440 {
 441         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 442         struct sk_buff *skb;
 443         struct ieee80211_mgmt *mgmt;
 444
 445         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 446                             sizeof(*mgmt) + 6 + extra_len);
 447         if (!skb) {
 448                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 449                        "frame\n", dev->name);
 450                 return;
 451         }
 452         skb_reserve(skb, local->hw.extra_tx_headroom);
 453
 454         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 455         memset(mgmt, 0, 24 + 6);
 456         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 457                                            IEEE80211_STYPE_AUTH);
 458         if (encrypt)
 459                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 460         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 461         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 462         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 463         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 464         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 465         ifsta->auth_transaction = transaction + 1;
 466         mgmt->u.auth.status_code = cpu_to_le16(0);
 467         if (extra)
 468                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 469
 470         ieee80211_sta_tx(dev, skb, encrypt);
 471 }
 472
 473
 474 static void ieee80211_authenticate(struct net_device *dev,
 475                                    struct ieee80211_if_sta *ifsta)
 476 {
 477         ifsta->auth_tries++;
 478         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 479                 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
 480                        " timed out\n",
 481                        dev->name, MAC_ARG(ifsta->bssid));
 482                 ifsta->state = IEEE80211_DISABLED;
 483                 return;
 484         }
 485
 486         ifsta->state = IEEE80211_AUTHENTICATE;
 487         printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
 488                dev->name, MAC_ARG(ifsta->bssid));
 489
 490         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 491
 492         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 493 }
 494
 495
 496 static void ieee80211_send_assoc(struct net_device *dev,
 497                                  struct ieee80211_if_sta *ifsta)
 498 {
 499         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 500         struct ieee80211_hw_mode *mode;
 501         struct sk_buff *skb;
 502         struct ieee80211_mgmt *mgmt;
 503         u8 *pos, *ies;
 504         int i, len;
 505         u16 capab;
 506         struct ieee80211_sta_bss *bss;
 507         int wmm = 0;
 508
 509         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 510                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 511                             ifsta->ssid_len);
 512         if (!skb) {
 513                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 514                        "frame\n", dev->name);
 515                 return;
 516         }
 517         skb_reserve(skb, local->hw.extra_tx_headroom);
 518
 519         mode = local->oper_hw_mode;
 520         capab = ifsta->capab;
 521         if (mode->mode == MODE_IEEE80211G) {
 522                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 523                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 524         }
 525         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 526                                    ifsta->ssid, ifsta->ssid_len);
 527         if (bss) {
 528                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 529                         capab |= WLAN_CAPABILITY_PRIVACY;
 530                 if (bss->wmm_ie) {
 531                         wmm = 1;
 532                 }
 533                 ieee80211_rx_bss_put(dev, bss);
 534         }
 535
 536         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 537         memset(mgmt, 0, 24);
 538         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 539         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 540         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 541
 542         if (ifsta->prev_bssid_set) {
 543                 skb_put(skb, 10);
 544                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 545                                                    IEEE80211_STYPE_REASSOC_REQ);
 546                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 547                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 548                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 549                        ETH_ALEN);
 550         } else {
 551                 skb_put(skb, 4);
 552                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 553                                                    IEEE80211_STYPE_ASSOC_REQ);
 554                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 555                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 556         }
 557
 558         /* SSID */
 559         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 560         *pos++ = WLAN_EID_SSID;
 561         *pos++ = ifsta->ssid_len;
 562         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 563
 564         len = mode->num_rates;
 565         if (len > 8)
 566                 len = 8;
 567         pos = skb_put(skb, len + 2);
 568         *pos++ = WLAN_EID_SUPP_RATES;
 569         *pos++ = len;
 570         for (i = 0; i < len; i++) {
 571                 int rate = mode->rates[i].rate;
 572                 if (mode->mode == MODE_ATHEROS_TURBO)
 573                         rate /= 2;
 574                 *pos++ = (u8) (rate / 5);
 575         }
 576
 577         if (mode->num_rates > len) {
 578                 pos = skb_put(skb, mode->num_rates - len + 2);
 579                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 580                 *pos++ = mode->num_rates - len;
 581                 for (i = len; i < mode->num_rates; i++) {
 582                         int rate = mode->rates[i].rate;
 583                         if (mode->mode == MODE_ATHEROS_TURBO)
 584                                 rate /= 2;
 585                         *pos++ = (u8) (rate / 5);
 586                 }
 587         }
 588
 589         if (ifsta->extra_ie) {
 590                 pos = skb_put(skb, ifsta->extra_ie_len);
 591                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 592         }
 593
 594         if (wmm && ifsta->wmm_enabled) {
 595                 pos = skb_put(skb, 9);
 596                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 597                 *pos++ = 7; /* len */
 598                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 599                 *pos++ = 0x50;
 600                 *pos++ = 0xf2;
 601                 *pos++ = 2; /* WME */
 602                 *pos++ = 0; /* WME info */
 603                 *pos++ = 1; /* WME ver */
 604                 *pos++ = 0;
 605         }
 606
 607         kfree(ifsta->assocreq_ies);
 608         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 609         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
 610         if (ifsta->assocreq_ies)
 611                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 612
 613         ieee80211_sta_tx(dev, skb, 0);
 614 }
 615
 616
 617 static void ieee80211_send_deauth(struct net_device *dev,
 618                                   struct ieee80211_if_sta *ifsta, u16 reason)
 619 {
 620         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 621         struct sk_buff *skb;
 622         struct ieee80211_mgmt *mgmt;
 623
 624         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 625         if (!skb) {
 626                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 627                        "frame\n", dev->name);
 628                 return;
 629         }
 630         skb_reserve(skb, local->hw.extra_tx_headroom);
 631
 632         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 633         memset(mgmt, 0, 24);
 634         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 635         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 636         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 637         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 638                                            IEEE80211_STYPE_DEAUTH);
 639         skb_put(skb, 2);
 640         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 641
 642         ieee80211_sta_tx(dev, skb, 0);
 643 }
 644
 645
 646 static void ieee80211_send_disassoc(struct net_device *dev,
 647                                     struct ieee80211_if_sta *ifsta, u16 reason)
 648 {
 649         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 650         struct sk_buff *skb;
 651         struct ieee80211_mgmt *mgmt;
 652
 653         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 654         if (!skb) {
 655                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 656                        "frame\n", dev->name);
 657                 return;
 658         }
 659         skb_reserve(skb, local->hw.extra_tx_headroom);
 660
 661         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 662         memset(mgmt, 0, 24);
 663         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 664         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 665         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 666         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 667                                            IEEE80211_STYPE_DISASSOC);
 668         skb_put(skb, 2);
 669         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 670
 671         ieee80211_sta_tx(dev, skb, 0);
 672 }
 673
 674
 675 static int ieee80211_privacy_mismatch(struct net_device *dev,
 676                                       struct ieee80211_if_sta *ifsta)
 677 {
 678         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 679         struct ieee80211_sta_bss *bss;
 680         int res = 0;
 681
 682         if (!ifsta || ifsta->mixed_cell ||
 683             ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
 684                 return 0;
 685
 686         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 687                                    ifsta->ssid, ifsta->ssid_len);
 688         if (!bss)
 689                 return 0;
 690
 691         if (ieee80211_sta_wep_configured(dev) !=
 692             !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
 693                 res = 1;
 694
 695         ieee80211_rx_bss_put(dev, bss);
 696
 697         return res;
 698 }
 699
 700
 701 static void ieee80211_associate(struct net_device *dev,
 702                                 struct ieee80211_if_sta *ifsta)
 703 {
 704         ifsta->assoc_tries++;
 705         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 706                 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
 707                        " timed out\n",
 708                        dev->name, MAC_ARG(ifsta->bssid));
 709                 ifsta->state = IEEE80211_DISABLED;
 710                 return;
 711         }
 712
 713         ifsta->state = IEEE80211_ASSOCIATE;
 714         printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
 715                dev->name, MAC_ARG(ifsta->bssid));
 716         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 717                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 718                        "mixed-cell disabled - abort association\n", dev->name);
 719                 ifsta->state = IEEE80211_DISABLED;
 720                 return;
 721         }
 722
 723         ieee80211_send_assoc(dev, ifsta);
 724
 725         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 726 }
 727
 728
 729 static void ieee80211_associated(struct net_device *dev,
 730                                  struct ieee80211_if_sta *ifsta)
 731 {
 732         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 733         struct sta_info *sta;
 734         int disassoc;
 735
 736         /* TODO: start monitoring current AP signal quality and number of
 737          * missed beacons. Scan other channels every now and then and search
 738          * for better APs. */
 739         /* TODO: remove expired BSSes */
 740
 741         ifsta->state = IEEE80211_ASSOCIATED;
 742
 743         sta = sta_info_get(local, ifsta->bssid);
 744         if (!sta) {
 745                 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
 746                        dev->name, MAC_ARG(ifsta->bssid));
 747                 disassoc = 1;
 748         } else {
 749                 disassoc = 0;
 750                 if (time_after(jiffies,
 751                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 752                         if (ifsta->probereq_poll) {
 753                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 754                                        "current AP " MAC_FMT " - assume out of "
 755                                        "range\n",
 756                                        dev->name, MAC_ARG(ifsta->bssid));
 757                                 disassoc = 1;
 758                                 sta_info_free(sta, 0);
 759                                 ifsta->probereq_poll = 0;
 760                         } else {
 761                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 762                                                          local->scan_ssid,
 763                                                          local->scan_ssid_len);
 764                                 ifsta->probereq_poll = 1;
 765                         }
 766                 } else {
 767                         ifsta->probereq_poll = 0;
 768                         if (time_after(jiffies, ifsta->last_probe +
 769                                        IEEE80211_PROBE_INTERVAL)) {
 770                                 ifsta->last_probe = jiffies;
 771                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 772                                                          ifsta->ssid,
 773                                                          ifsta->ssid_len);
 774                         }
 775                 }
 776                 sta_info_put(sta);
 777         }
 778         if (disassoc) {
 779                 union iwreq_data wrqu;
 780                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 781                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 782                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 783                 mod_timer(&ifsta->timer, jiffies +
 784                                       IEEE80211_MONITORING_INTERVAL + 30 * HZ);
 785         } else {
 786                 mod_timer(&ifsta->timer, jiffies +
 787                                       IEEE80211_MONITORING_INTERVAL);
 788         }
 789 }
 790
 791
 792 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 793                                      u8 *ssid, size_t ssid_len)
 794 {
 795         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 796         struct ieee80211_hw_mode *mode;
 797         struct sk_buff *skb;
 798         struct ieee80211_mgmt *mgmt;
 799         u8 *pos, *supp_rates, *esupp_rates = NULL;
 800         int i;
 801
 802         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 803         if (!skb) {
 804                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 805                        "request\n", dev->name);
 806                 return;
 807         }
 808         skb_reserve(skb, local->hw.extra_tx_headroom);
 809
 810         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 811         memset(mgmt, 0, 24);
 812         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 813                                            IEEE80211_STYPE_PROBE_REQ);
 814         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 815         if (dst) {
 816                 memcpy(mgmt->da, dst, ETH_ALEN);
 817                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 818         } else {
 819                 memset(mgmt->da, 0xff, ETH_ALEN);
 820                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 821         }
 822         pos = skb_put(skb, 2 + ssid_len);
 823         *pos++ = WLAN_EID_SSID;
 824         *pos++ = ssid_len;
 825         memcpy(pos, ssid, ssid_len);
 826
 827         supp_rates = skb_put(skb, 2);
 828         supp_rates[0] = WLAN_EID_SUPP_RATES;
 829         supp_rates[1] = 0;
 830         mode = local->oper_hw_mode;
 831         for (i = 0; i < mode->num_rates; i++) {
 832                 struct ieee80211_rate *rate = &mode->rates[i];
 833                 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
 834                         continue;
 835                 if (esupp_rates) {
 836                         pos = skb_put(skb, 1);
 837                         esupp_rates[1]++;
 838                 } else if (supp_rates[1] == 8) {
 839                         esupp_rates = skb_put(skb, 3);
 840                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 841                         esupp_rates[1] = 1;
 842                         pos = &esupp_rates[2];
 843                 } else {
 844                         pos = skb_put(skb, 1);
 845                         supp_rates[1]++;
 846                 }
 847                 if (mode->mode == MODE_ATHEROS_TURBO)
 848                         *pos = rate->rate / 10;
 849                 else
 850                         *pos = rate->rate / 5;
 851         }
 852
 853         ieee80211_sta_tx(dev, skb, 0);
 854 }
 855
 856
 857 static int ieee80211_sta_wep_configured(struct net_device *dev)
 858 {
 859         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 860         if (!sdata || !sdata->default_key ||
 861             sdata->default_key->alg != ALG_WEP)
 862                 return 0;
 863         return 1;
 864 }
 865
 866
 867 static void ieee80211_auth_completed(struct net_device *dev,
 868                                      struct ieee80211_if_sta *ifsta)
 869 {
 870         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 871         ifsta->authenticated = 1;
 872         ieee80211_associate(dev, ifsta);
 873 }
 874
 875
 876 static void ieee80211_auth_challenge(struct net_device *dev,
 877                                      struct ieee80211_if_sta *ifsta,
 878                                      struct ieee80211_mgmt *mgmt,
 879                                      size_t len)
 880 {
 881         u8 *pos;
 882         struct ieee802_11_elems elems;
 883
 884         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 885         pos = mgmt->u.auth.variable;
 886         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 887         if (!elems.challenge) {
 888                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 889                        "frame\n", dev->name);
 890                 return;
 891         }
 892         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 893                             elems.challenge_len + 2, 1);
 894 }
 895
 896
 897 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
 898                                    struct ieee80211_if_sta *ifsta,
 899                                    struct ieee80211_mgmt *mgmt,
 900                                    size_t len)
 901 {
 902         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 903         u16 auth_alg, auth_transaction, status_code;
 904
 905         if (ifsta->state != IEEE80211_AUTHENTICATE &&
 906             sdata->type != IEEE80211_IF_TYPE_IBSS) {
 907                 printk(KERN_DEBUG "%s: authentication frame received from "
 908                        MAC_FMT ", but not in authenticate state - ignored\n",
 909                        dev->name, MAC_ARG(mgmt->sa));
 910                 return;
 911         }
 912
 913         if (len < 24 + 6) {
 914                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
 915                        "received from " MAC_FMT " - ignored\n",
 916                        dev->name, len, MAC_ARG(mgmt->sa));
 917                 return;
 918         }
 919
 920         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
 921             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
 922                 printk(KERN_DEBUG "%s: authentication frame received from "
 923                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
 924                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
 925                        MAC_ARG(mgmt->bssid));
 926                 return;
 927         }
 928
 929         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
 930             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
 931                 printk(KERN_DEBUG "%s: authentication frame received from "
 932                        "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
 933                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
 934                        MAC_ARG(mgmt->bssid));
 935                 return;
 936         }
 937
 938         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
 939         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
 940         status_code = le16_to_cpu(mgmt->u.auth.status_code);
 941
 942         printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
 943                "transaction=%d status=%d)\n",
 944                dev->name, MAC_ARG(mgmt->sa), auth_alg,
 945                auth_transaction, status_code);
 946
 947         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
 948                 /* IEEE 802.11 standard does not require authentication in IBSS
 949                  * networks and most implementations do not seem to use it.
 950                  * However, try to reply to authentication attempts if someone
 951                  * has actually implemented this.
 952                  * TODO: Could implement shared key authentication. */
 953                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
 954                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
 955                                "frame (alg=%d transaction=%d)\n",
 956                                dev->name, auth_alg, auth_transaction);
 957                         return;
 958                 }
 959                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
 960         }
 961
 962         if (auth_alg != ifsta->auth_alg ||
 963             auth_transaction != ifsta->auth_transaction) {
 964                 printk(KERN_DEBUG "%s: unexpected authentication frame "
 965                        "(alg=%d transaction=%d)\n",
 966                        dev->name, auth_alg, auth_transaction);
 967                 return;
 968         }
 969
 970         if (status_code != WLAN_STATUS_SUCCESS) {
 971                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
 972                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
 973                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
 974                         u8 algs[3];
 975                         const int num_algs = ARRAY_SIZE(algs);
 976                         int i, pos;
 977                         algs[0] = algs[1] = algs[2] = 0xff;
 978                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
 979                                 algs[0] = WLAN_AUTH_OPEN;
 980                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
 981                                 algs[1] = WLAN_AUTH_SHARED_KEY;
 982                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
 983                                 algs[2] = WLAN_AUTH_LEAP;
 984                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
 985                                 pos = 0;
 986                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
 987                                 pos = 1;
 988                         else
 989                                 pos = 2;
 990                         for (i = 0; i < num_algs; i++) {
 991                                 pos++;
 992                                 if (pos >= num_algs)
 993                                         pos = 0;
 994                                 if (algs[pos] == ifsta->auth_alg ||
 995                                     algs[pos] == 0xff)
 996                                         continue;
 997                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
 998                                     !ieee80211_sta_wep_configured(dev))
 999                                         continue;
1000                                 ifsta->auth_alg = algs[pos];
1001                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1002                                        "next try\n",
1003                                        dev->name, ifsta->auth_alg);
1004                                 break;
1005                         }
1006                 }
1007                 return;
1008         }
1009
1010         switch (ifsta->auth_alg) {
1011         case WLAN_AUTH_OPEN:
1012         case WLAN_AUTH_LEAP:
1013                 ieee80211_auth_completed(dev, ifsta);
1014                 break;
1015         case WLAN_AUTH_SHARED_KEY:
1016                 if (ifsta->auth_transaction == 4)
1017                         ieee80211_auth_completed(dev, ifsta);
1018                 else
1019                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1020                 break;
1021         }
1022 }
1023
1024
1025 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1026                                      struct ieee80211_if_sta *ifsta,
1027                                      struct ieee80211_mgmt *mgmt,
1028                                      size_t len)
1029 {
1030         u16 reason_code;
1031
1032         if (len < 24 + 2) {
1033                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1034                        "received from " MAC_FMT " - ignored\n",
1035                        dev->name, len, MAC_ARG(mgmt->sa));
1036                 return;
1037         }
1038
1039         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1040                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1041                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1042                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1043                        MAC_ARG(mgmt->bssid));
1044                 return;
1045         }
1046
1047         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1048
1049         printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1050                " (reason=%d)\n",
1051                dev->name, MAC_ARG(mgmt->sa), reason_code);
1052
1053         if (ifsta->authenticated) {
1054                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1055         }
1056
1057         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1058             ifsta->state == IEEE80211_ASSOCIATE ||
1059             ifsta->state == IEEE80211_ASSOCIATED) {
1060                 ifsta->state = IEEE80211_AUTHENTICATE;
1061                 mod_timer(&ifsta->timer, jiffies +
1062                                       IEEE80211_RETRY_AUTH_INTERVAL);
1063         }
1064
1065         ieee80211_set_disassoc(dev, ifsta, 1);
1066         ifsta->authenticated = 0;
1067 }
1068
1069
1070 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1071                                        struct ieee80211_if_sta *ifsta,
1072                                        struct ieee80211_mgmt *mgmt,
1073                                        size_t len)
1074 {
1075         u16 reason_code;
1076
1077         if (len < 24 + 2) {
1078                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1079                        "received from " MAC_FMT " - ignored\n",
1080                        dev->name, len, MAC_ARG(mgmt->sa));
1081                 return;
1082         }
1083
1084         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1085                 printk(KERN_DEBUG "%s: disassociation frame received from "
1086                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1087                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1088                        MAC_ARG(mgmt->bssid));
1089                 return;
1090         }
1091
1092         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1093
1094         printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1095                " (reason=%d)\n",
1096                dev->name, MAC_ARG(mgmt->sa), reason_code);
1097
1098         if (ifsta->associated)
1099                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1100
1101         if (ifsta->state == IEEE80211_ASSOCIATED) {
1102                 ifsta->state = IEEE80211_ASSOCIATE;
1103                 mod_timer(&ifsta->timer, jiffies +
1104                                       IEEE80211_RETRY_AUTH_INTERVAL);
1105         }
1106
1107         ieee80211_set_disassoc(dev, ifsta, 0);
1108 }
1109
1110
1111 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1112                                          struct ieee80211_if_sta *ifsta,
1113                                          struct ieee80211_mgmt *mgmt,
1114                                          size_t len,
1115                                          int reassoc)
1116 {
1117         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1118         struct ieee80211_hw_mode *mode;
1119         struct sta_info *sta;
1120         u32 rates;
1121         u16 capab_info, status_code, aid;
1122         struct ieee802_11_elems elems;
1123         u8 *pos;
1124         int i, j;
1125
1126         /* AssocResp and ReassocResp have identical structure, so process both
1127          * of them in this function. */
1128
1129         if (ifsta->state != IEEE80211_ASSOCIATE) {
1130                 printk(KERN_DEBUG "%s: association frame received from "
1131                        MAC_FMT ", but not in associate state - ignored\n",
1132                        dev->name, MAC_ARG(mgmt->sa));
1133                 return;
1134         }
1135
1136         if (len < 24 + 6) {
1137                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1138                        "received from " MAC_FMT " - ignored\n",
1139                        dev->name, len, MAC_ARG(mgmt->sa));
1140                 return;
1141         }
1142
1143         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1144                 printk(KERN_DEBUG "%s: association frame received from "
1145                        "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1146                        "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1147                        MAC_ARG(mgmt->bssid));
1148                 return;
1149         }
1150
1151         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1152         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1153         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1154
1155         printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1156                "status=%d aid=%d)\n",
1157                dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1158                capab_info, status_code, aid & ~(BIT(15) | BIT(14)));
1159
1160         if (status_code != WLAN_STATUS_SUCCESS) {
1161                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1162                        dev->name, status_code);
1163                 if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
1164                         ifsta->prev_bssid_set = 0;
1165                 return;
1166         }
1167
1168         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1169                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1170                        "set\n", dev->name, aid);
1171         aid &= ~(BIT(15) | BIT(14));
1172
1173         pos = mgmt->u.assoc_resp.variable;
1174         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1175
1176         if (!elems.supp_rates) {
1177                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1178                        dev->name);
1179                 return;
1180         }
1181
1182         /* it probably doesn't, but if the frame includes an ERP value then
1183          * update our stored copy */
1184         if (elems.erp_info && elems.erp_info_len >= 1) {
1185                 struct ieee80211_sta_bss *bss
1186                         = ieee80211_rx_bss_get(dev, ifsta->bssid,
1187                                                local->hw.conf.channel,
1188                                                ifsta->ssid, ifsta->ssid_len);
1189                 if (bss) {
1190                         bss->erp_value = elems.erp_info[0];
1191                         bss->has_erp_value = 1;
1192                         ieee80211_rx_bss_put(dev, bss);
1193                 }
1194         }
1195
1196         printk(KERN_DEBUG "%s: associated\n", dev->name);
1197         ifsta->aid = aid;
1198         ifsta->ap_capab = capab_info;
1199
1200         kfree(ifsta->assocresp_ies);
1201         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1202         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1203         if (ifsta->assocresp_ies)
1204                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1205
1206         ieee80211_set_associated(dev, ifsta, 1);
1207
1208         /* Add STA entry for the AP */
1209         sta = sta_info_get(local, ifsta->bssid);
1210         if (!sta) {
1211                 struct ieee80211_sta_bss *bss;
1212                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1213                 if (!sta) {
1214                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1215                                " AP\n", dev->name);
1216                         return;
1217                 }
1218                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1219                                            local->hw.conf.channel,
1220                                            ifsta->ssid, ifsta->ssid_len);
1221                 if (bss) {
1222                         sta->last_rssi = bss->rssi;
1223                         sta->last_signal = bss->signal;
1224                         sta->last_noise = bss->noise;
1225                         ieee80211_rx_bss_put(dev, bss);
1226                 }
1227         }
1228
1229         sta->dev = dev;
1230         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1231         sta->assoc_ap = 1;
1232
1233         rates = 0;
1234         mode = local->oper_hw_mode;
1235         for (i = 0; i < elems.supp_rates_len; i++) {
1236                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1237                 if (mode->mode == MODE_ATHEROS_TURBO)
1238                         rate *= 2;
1239                 for (j = 0; j < mode->num_rates; j++)
1240                         if (mode->rates[j].rate == rate)
1241                                 rates |= BIT(j);
1242         }
1243         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1244                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1245                 if (mode->mode == MODE_ATHEROS_TURBO)
1246                         rate *= 2;
1247                 for (j = 0; j < mode->num_rates; j++)
1248                         if (mode->rates[j].rate == rate)
1249                                 rates |= BIT(j);
1250         }
1251         sta->supp_rates = rates;
1252
1253         rate_control_rate_init(sta, local);
1254
1255         if (elems.wmm_param && ifsta->wmm_enabled) {
1256                 sta->flags |= WLAN_STA_WME;
1257                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1258                                          elems.wmm_param_len);
1259         }
1260
1261
1262         sta_info_put(sta);
1263
1264         ieee80211_associated(dev, ifsta);
1265 }
1266
1267
1268 /* Caller must hold local->sta_bss_lock */
1269 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1270                                         struct ieee80211_sta_bss *bss)
1271 {
1272         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1273         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1274         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1275 }
1276
1277
1278 /* Caller must hold local->sta_bss_lock */
1279 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1280                                         struct ieee80211_sta_bss *bss)
1281 {
1282         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1283         struct ieee80211_sta_bss *b, *prev = NULL;
1284         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1285         while (b) {
1286                 if (b == bss) {
1287                         if (!prev)
1288                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1289                                         bss->hnext;
1290                         else
1291                                 prev->hnext = bss->hnext;
1292                         break;
1293                 }
1294                 prev = b;
1295                 b = b->hnext;
1296         }
1297 }
1298
1299
1300 static struct ieee80211_sta_bss *
1301 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1302                      u8 *ssid, u8 ssid_len)
1303 {
1304         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1305         struct ieee80211_sta_bss *bss;
1306
1307         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1308         if (!bss)
1309                 return NULL;
1310         atomic_inc(&bss->users);
1311         atomic_inc(&bss->users);
1312         memcpy(bss->bssid, bssid, ETH_ALEN);
1313         bss->channel = channel;
1314         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1315                 memcpy(bss->ssid, ssid, ssid_len);
1316                 bss->ssid_len = ssid_len;
1317         }
1318
1319         spin_lock_bh(&local->sta_bss_lock);
1320         /* TODO: order by RSSI? */
1321         list_add_tail(&bss->list, &local->sta_bss_list);
1322         __ieee80211_rx_bss_hash_add(dev, bss);
1323         spin_unlock_bh(&local->sta_bss_lock);
1324         return bss;
1325 }
1326
1327
1328 static struct ieee80211_sta_bss *
1329 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1330                      u8 *ssid, u8 ssid_len)
1331 {
1332         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1333         struct ieee80211_sta_bss *bss;
1334
1335         spin_lock_bh(&local->sta_bss_lock);
1336         bss = local->sta_bss_hash[STA_HASH(bssid)];
1337         while (bss) {
1338                 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1339                     bss->channel == channel &&
1340                     bss->ssid_len == ssid_len &&
1341                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1342                         atomic_inc(&bss->users);
1343                         break;
1344                 }
1345                 bss = bss->hnext;
1346         }
1347         spin_unlock_bh(&local->sta_bss_lock);
1348         return bss;
1349 }
1350
1351
1352 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1353 {
1354         kfree(bss->wpa_ie);
1355         kfree(bss->rsn_ie);
1356         kfree(bss->wmm_ie);
1357         kfree(bss);
1358 }
1359
1360
1361 static void ieee80211_rx_bss_put(struct net_device *dev,
1362                                  struct ieee80211_sta_bss *bss)
1363 {
1364         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1365         if (!atomic_dec_and_test(&bss->users))
1366                 return;
1367
1368         spin_lock_bh(&local->sta_bss_lock);
1369         __ieee80211_rx_bss_hash_del(dev, bss);
1370         list_del(&bss->list);
1371         spin_unlock_bh(&local->sta_bss_lock);
1372         ieee80211_rx_bss_free(bss);
1373 }
1374
1375
1376 void ieee80211_rx_bss_list_init(struct net_device *dev)
1377 {
1378         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1379         spin_lock_init(&local->sta_bss_lock);
1380         INIT_LIST_HEAD(&local->sta_bss_list);
1381 }
1382
1383
1384 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1385 {
1386         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1387         struct ieee80211_sta_bss *bss, *tmp;
1388
1389         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1390                 ieee80211_rx_bss_put(dev, bss);
1391 }
1392
1393
1394 static void ieee80211_rx_bss_info(struct net_device *dev,
1395                                   struct ieee80211_mgmt *mgmt,
1396                                   size_t len,
1397                                   struct ieee80211_rx_status *rx_status,
1398                                   int beacon)
1399 {
1400         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1401         struct ieee802_11_elems elems;
1402         size_t baselen;
1403         int channel, clen;
1404         struct ieee80211_sta_bss *bss;
1405         struct sta_info *sta;
1406         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1407         u64 timestamp;
1408
1409         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1410                 return; /* ignore ProbeResp to foreign address */
1411
1412 #if 0
1413         printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1414                dev->name, beacon ? "Beacon" : "Probe Response",
1415                MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1416 #endif
1417
1418         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1419         if (baselen > len)
1420                 return;
1421
1422         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1423
1424         if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1425             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1426 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1427                 static unsigned long last_tsf_debug = 0;
1428                 u64 tsf;
1429                 if (local->ops->get_tsf)
1430                         tsf = local->ops->get_tsf(local_to_hw(local));
1431                 else
1432                         tsf = -1LLU;
1433                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1434                         printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1435                                MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1436                                "@%lu\n",
1437                                MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1438                                (unsigned long long)tsf,
1439                                (unsigned long long)timestamp,
1440                                (unsigned long long)(tsf - timestamp),
1441                                jiffies);
1442                         last_tsf_debug = jiffies;
1443                 }
1444 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1445         }
1446
1447         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1448
1449         if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1450             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1451             (sta = sta_info_get(local, mgmt->sa))) {
1452                 struct ieee80211_hw_mode *mode;
1453                 struct ieee80211_rate *rates;
1454                 size_t num_rates;
1455                 u32 supp_rates, prev_rates;
1456                 int i, j;
1457
1458                 mode = local->sta_scanning ?
1459                        local->scan_hw_mode : local->oper_hw_mode;
1460                 rates = mode->rates;
1461                 num_rates = mode->num_rates;
1462
1463                 supp_rates = 0;
1464                 for (i = 0; i < elems.supp_rates_len +
1465                              elems.ext_supp_rates_len; i++) {
1466                         u8 rate = 0;
1467                         int own_rate;
1468                         if (i < elems.supp_rates_len)
1469                                 rate = elems.supp_rates[i];
1470                         else if (elems.ext_supp_rates)
1471                                 rate = elems.ext_supp_rates
1472                                         [i - elems.supp_rates_len];
1473                         own_rate = 5 * (rate & 0x7f);
1474                         if (mode->mode == MODE_ATHEROS_TURBO)
1475                                 own_rate *= 2;
1476                         for (j = 0; j < num_rates; j++)
1477                                 if (rates[j].rate == own_rate)
1478                                         supp_rates |= BIT(j);
1479                 }
1480
1481                 prev_rates = sta->supp_rates;
1482                 sta->supp_rates &= supp_rates;
1483                 if (sta->supp_rates == 0) {
1484                         /* No matching rates - this should not really happen.
1485                          * Make sure that at least one rate is marked
1486                          * supported to avoid issues with TX rate ctrl. */
1487                         sta->supp_rates = sdata->u.sta.supp_rates_bits;
1488                 }
1489                 if (sta->supp_rates != prev_rates) {
1490                         printk(KERN_DEBUG "%s: updated supp_rates set for "
1491                                MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1492                                "0x%x)\n",
1493                                dev->name, MAC_ARG(sta->addr), prev_rates,
1494                                supp_rates, sta->supp_rates);
1495                 }
1496                 sta_info_put(sta);
1497         }
1498
1499         if (!elems.ssid)
1500                 return;
1501
1502         if (elems.ds_params && elems.ds_params_len == 1)
1503                 channel = elems.ds_params[0];
1504         else
1505                 channel = rx_status->channel;
1506
1507         bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1508                                    elems.ssid, elems.ssid_len);
1509         if (!bss) {
1510                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1511                                            elems.ssid, elems.ssid_len);
1512                 if (!bss)
1513                         return;
1514         } else {
1515 #if 0
1516                 /* TODO: order by RSSI? */
1517                 spin_lock_bh(&local->sta_bss_lock);
1518                 list_move_tail(&bss->list, &local->sta_bss_list);
1519                 spin_unlock_bh(&local->sta_bss_lock);
1520 #endif
1521         }
1522
1523         if (bss->probe_resp && beacon) {
1524                 /* Do not allow beacon to override data from Probe Response. */
1525                 ieee80211_rx_bss_put(dev, bss);
1526                 return;
1527         }
1528
1529         /* save the ERP value so that it is available at association time */
1530         if (elems.erp_info && elems.erp_info_len >= 1) {
1531                 bss->erp_value = elems.erp_info[0];
1532                 bss->has_erp_value = 1;
1533         }
1534
1535         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1536         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1537
1538         bss->supp_rates_len = 0;
1539         if (elems.supp_rates) {
1540                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1541                 if (clen > elems.supp_rates_len)
1542                         clen = elems.supp_rates_len;
1543                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1544                        clen);
1545                 bss->supp_rates_len += clen;
1546         }
1547         if (elems.ext_supp_rates) {
1548                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1549                 if (clen > elems.ext_supp_rates_len)
1550                         clen = elems.ext_supp_rates_len;
1551                 memcpy(&bss->supp_rates[bss->supp_rates_len],
1552                        elems.ext_supp_rates, clen);
1553                 bss->supp_rates_len += clen;
1554         }
1555
1556         if (elems.wpa &&
1557             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1558              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1559                 kfree(bss->wpa_ie);
1560                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1561                 if (bss->wpa_ie) {
1562                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1563                         bss->wpa_ie_len = elems.wpa_len + 2;
1564                 } else
1565                         bss->wpa_ie_len = 0;
1566         } else if (!elems.wpa && bss->wpa_ie) {
1567                 kfree(bss->wpa_ie);
1568                 bss->wpa_ie = NULL;
1569                 bss->wpa_ie_len = 0;
1570         }
1571
1572         if (elems.rsn &&
1573             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1574              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1575                 kfree(bss->rsn_ie);
1576                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1577                 if (bss->rsn_ie) {
1578                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1579                         bss->rsn_ie_len = elems.rsn_len + 2;
1580                 } else
1581                         bss->rsn_ie_len = 0;
1582         } else if (!elems.rsn && bss->rsn_ie) {
1583                 kfree(bss->rsn_ie);
1584                 bss->rsn_ie = NULL;
1585                 bss->rsn_ie_len = 0;
1586         }
1587
1588         if (elems.wmm_param &&
1589             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1590              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1591                 kfree(bss->wmm_ie);
1592                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1593                 if (bss->wmm_ie) {
1594                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
1595                                elems.wmm_param_len + 2);
1596                         bss->wmm_ie_len = elems.wmm_param_len + 2;
1597                 } else
1598                         bss->wmm_ie_len = 0;
1599         } else if (!elems.wmm_param && bss->wmm_ie) {
1600                 kfree(bss->wmm_ie);
1601                 bss->wmm_ie = NULL;
1602                 bss->wmm_ie_len = 0;
1603         }
1604
1605
1606         bss->hw_mode = rx_status->phymode;
1607         bss->freq = rx_status->freq;
1608         if (channel != rx_status->channel &&
1609             (bss->hw_mode == MODE_IEEE80211G ||
1610              bss->hw_mode == MODE_IEEE80211B) &&
1611             channel >= 1 && channel <= 14) {
1612                 static const int freq_list[] = {
1613                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
1614                         2447, 2452, 2457, 2462, 2467, 2472, 2484
1615                 };
1616                 /* IEEE 802.11g/b mode can receive packets from neighboring
1617                  * channels, so map the channel into frequency. */
1618                 bss->freq = freq_list[channel - 1];
1619         }
1620         bss->timestamp = timestamp;
1621         bss->last_update = jiffies;
1622         bss->rssi = rx_status->ssi;
1623         bss->signal = rx_status->signal;
1624         bss->noise = rx_status->noise;
1625         if (!beacon)
1626                 bss->probe_resp++;
1627         ieee80211_rx_bss_put(dev, bss);
1628 }
1629
1630
1631 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1632                                          struct ieee80211_mgmt *mgmt,
1633                                          size_t len,
1634                                          struct ieee80211_rx_status *rx_status)
1635 {
1636         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1637 }
1638
1639
1640 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1641                                      struct ieee80211_mgmt *mgmt,
1642                                      size_t len,
1643                                      struct ieee80211_rx_status *rx_status)
1644 {
1645         struct ieee80211_sub_if_data *sdata;
1646         struct ieee80211_if_sta *ifsta;
1647         size_t baselen;
1648         struct ieee802_11_elems elems;
1649
1650         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1651
1652         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1653         if (sdata->type != IEEE80211_IF_TYPE_STA)
1654                 return;
1655         ifsta = &sdata->u.sta;
1656
1657         if (!ifsta->associated ||
1658             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1659                 return;
1660
1661         /* Process beacon from the current BSS */
1662         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1663         if (baselen > len)
1664                 return;
1665
1666         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1667
1668         if (elems.erp_info && elems.erp_info_len >= 1)
1669                 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1670
1671         if (elems.wmm_param && ifsta->wmm_enabled) {
1672                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1673                                          elems.wmm_param_len);
1674         }
1675 }
1676
1677
1678 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1679                                         struct ieee80211_if_sta *ifsta,
1680                                         struct ieee80211_mgmt *mgmt,
1681                                         size_t len,
1682                                         struct ieee80211_rx_status *rx_status)
1683 {
1684         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1685         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1686         int tx_last_beacon;
1687         struct sk_buff *skb;
1688         struct ieee80211_mgmt *resp;
1689         u8 *pos, *end;
1690
1691         if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1692             ifsta->state != IEEE80211_IBSS_JOINED ||
1693             len < 24 + 2 || !ifsta->probe_resp)
1694                 return;
1695
1696         if (local->ops->tx_last_beacon)
1697                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1698         else
1699                 tx_last_beacon = 1;
1700
1701 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1702         printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1703                MAC_FMT " (tx_last_beacon=%d)\n",
1704                dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1705                MAC_ARG(mgmt->bssid), tx_last_beacon);
1706 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1707
1708         if (!tx_last_beacon)
1709                 return;
1710
1711         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1712             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1713                 return;
1714
1715         end = ((u8 *) mgmt) + len;
1716         pos = mgmt->u.probe_req.variable;
1717         if (pos[0] != WLAN_EID_SSID ||
1718             pos + 2 + pos[1] > end) {
1719                 if (net_ratelimit()) {
1720                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1721                                "from " MAC_FMT "\n",
1722                                dev->name, MAC_ARG(mgmt->sa));
1723                 }
1724                 return;
1725         }
1726         if (pos[1] != 0 &&
1727             (pos[1] != ifsta->ssid_len ||
1728              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1729                 /* Ignore ProbeReq for foreign SSID */
1730                 return;
1731         }
1732
1733         /* Reply with ProbeResp */
1734         skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1735         if (!skb)
1736                 return;
1737
1738         resp = (struct ieee80211_mgmt *) skb->data;
1739         memcpy(resp->da, mgmt->sa, ETH_ALEN);
1740 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1741         printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1742                dev->name, MAC_ARG(resp->da));
1743 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1744         ieee80211_sta_tx(dev, skb, 0);
1745 }
1746
1747
1748 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1749                            struct ieee80211_rx_status *rx_status)
1750 {
1751         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1752         struct ieee80211_sub_if_data *sdata;
1753         struct ieee80211_if_sta *ifsta;
1754         struct ieee80211_mgmt *mgmt;
1755         u16 fc;
1756
1757         if (skb->len < 24)
1758                 goto fail;
1759
1760         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1761         ifsta = &sdata->u.sta;
1762
1763         mgmt = (struct ieee80211_mgmt *) skb->data;
1764         fc = le16_to_cpu(mgmt->frame_control);
1765
1766         switch (fc & IEEE80211_FCTL_STYPE) {
1767         case IEEE80211_STYPE_PROBE_REQ:
1768         case IEEE80211_STYPE_PROBE_RESP:
1769         case IEEE80211_STYPE_BEACON:
1770                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1771         case IEEE80211_STYPE_AUTH:
1772         case IEEE80211_STYPE_ASSOC_RESP:
1773         case IEEE80211_STYPE_REASSOC_RESP:
1774         case IEEE80211_STYPE_DEAUTH:
1775         case IEEE80211_STYPE_DISASSOC:
1776                 skb_queue_tail(&ifsta->skb_queue, skb);
1777                 queue_work(local->hw.workqueue, &ifsta->work);
1778                 return;
1779         default:
1780                 printk(KERN_DEBUG "%s: received unknown management frame - "
1781                        "stype=%d\n", dev->name,
1782                        (fc & IEEE80211_FCTL_STYPE) >> 4);
1783                 break;
1784         }
1785
1786  fail:
1787         kfree_skb(skb);
1788 }
1789
1790
1791 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1792                                          struct sk_buff *skb)
1793 {
1794         struct ieee80211_rx_status *rx_status;
1795         struct ieee80211_sub_if_data *sdata;
1796         struct ieee80211_if_sta *ifsta;
1797         struct ieee80211_mgmt *mgmt;
1798         u16 fc;
1799
1800         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1801         ifsta = &sdata->u.sta;
1802
1803         rx_status = (struct ieee80211_rx_status *) skb->cb;
1804         mgmt = (struct ieee80211_mgmt *) skb->data;
1805         fc = le16_to_cpu(mgmt->frame_control);
1806
1807         switch (fc & IEEE80211_FCTL_STYPE) {
1808         case IEEE80211_STYPE_PROBE_REQ:
1809                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1810                                             rx_status);
1811                 break;
1812         case IEEE80211_STYPE_PROBE_RESP:
1813                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1814                 break;
1815         case IEEE80211_STYPE_BEACON:
1816                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1817                 break;
1818         case IEEE80211_STYPE_AUTH:
1819                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1820                 break;
1821         case IEEE80211_STYPE_ASSOC_RESP:
1822                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1823                 break;
1824         case IEEE80211_STYPE_REASSOC_RESP:
1825                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1826                 break;
1827         case IEEE80211_STYPE_DEAUTH:
1828                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1829                 break;
1830         case IEEE80211_STYPE_DISASSOC:
1831                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1832                 break;
1833         }
1834
1835         kfree_skb(skb);
1836 }
1837
1838
1839 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1840                            struct ieee80211_rx_status *rx_status)
1841 {
1842         struct ieee80211_mgmt *mgmt;
1843         u16 fc;
1844
1845         if (skb->len < 24) {
1846                 dev_kfree_skb(skb);
1847                 return;
1848         }
1849
1850         mgmt = (struct ieee80211_mgmt *) skb->data;
1851         fc = le16_to_cpu(mgmt->frame_control);
1852
1853         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1854                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1855                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1856                                                      skb->len, rx_status);
1857                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1858                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1859                                                  rx_status);
1860                 }
1861         }
1862
1863         dev_kfree_skb(skb);
1864 }
1865
1866
1867 static int ieee80211_sta_active_ibss(struct net_device *dev)
1868 {
1869         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1870         int active = 0;
1871         struct sta_info *sta;
1872
1873         spin_lock_bh(&local->sta_lock);
1874         list_for_each_entry(sta, &local->sta_list, list) {
1875                 if (sta->dev == dev &&
1876                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1877                                jiffies)) {
1878                         active++;
1879                         break;
1880                 }
1881         }
1882         spin_unlock_bh(&local->sta_lock);
1883
1884         return active;
1885 }
1886
1887
1888 static void ieee80211_sta_expire(struct net_device *dev)
1889 {
1890         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1891         struct sta_info *sta, *tmp;
1892
1893         spin_lock_bh(&local->sta_lock);
1894         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1895                 if (time_after(jiffies, sta->last_rx +
1896                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1897                         printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1898                                "\n", dev->name, MAC_ARG(sta->addr));
1899                         sta_info_free(sta, 1);
1900                 }
1901         spin_unlock_bh(&local->sta_lock);
1902 }
1903
1904
1905 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1906                                      struct ieee80211_if_sta *ifsta)
1907 {
1908         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1909
1910         ieee80211_sta_expire(dev);
1911         if (ieee80211_sta_active_ibss(dev))
1912                 return;
1913
1914         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1915                "IBSS networks with same SSID (merge)\n", dev->name);
1916         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1917 }
1918
1919
1920 void ieee80211_sta_timer(unsigned long data)
1921 {
1922         struct ieee80211_sub_if_data *sdata =
1923                 (struct ieee80211_sub_if_data *) data;
1924         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1925         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1926
1927         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1928         queue_work(local->hw.workqueue, &ifsta->work);
1929 }
1930
1931
1932 void ieee80211_sta_work(struct work_struct *work)
1933 {
1934         struct ieee80211_sub_if_data *sdata =
1935                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1936         struct net_device *dev = sdata->dev;
1937         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1938         struct ieee80211_if_sta *ifsta;
1939         struct sk_buff *skb;
1940
1941         if (!netif_running(dev))
1942                 return;
1943
1944         if (local->sta_scanning)
1945                 return;
1946
1947         if (sdata->type != IEEE80211_IF_TYPE_STA &&
1948             sdata->type != IEEE80211_IF_TYPE_IBSS) {
1949                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1950                        "(type=%d)\n", dev->name, sdata->type);
1951                 return;
1952         }
1953         ifsta = &sdata->u.sta;
1954
1955         while ((skb = skb_dequeue(&ifsta->skb_queue)))
1956                 ieee80211_sta_rx_queued_mgmt(dev, skb);
1957
1958         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1959             ifsta->state != IEEE80211_ASSOCIATE &&
1960             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1961                 ieee80211_sta_start_scan(dev, NULL, 0);
1962                 return;
1963         }
1964
1965         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1966                 if (ieee80211_sta_config_auth(dev, ifsta))
1967                         return;
1968                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1969         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
1970                 return;
1971
1972         switch (ifsta->state) {
1973         case IEEE80211_DISABLED:
1974                 break;
1975         case IEEE80211_AUTHENTICATE:
1976                 ieee80211_authenticate(dev, ifsta);
1977                 break;
1978         case IEEE80211_ASSOCIATE:
1979                 ieee80211_associate(dev, ifsta);
1980                 break;
1981         case IEEE80211_ASSOCIATED:
1982                 ieee80211_associated(dev, ifsta);
1983                 break;
1984         case IEEE80211_IBSS_SEARCH:
1985                 ieee80211_sta_find_ibss(dev, ifsta);
1986                 break;
1987         case IEEE80211_IBSS_JOINED:
1988                 ieee80211_sta_merge_ibss(dev, ifsta);
1989                 break;
1990         default:
1991                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
1992                        ifsta->state);
1993                 break;
1994         }
1995
1996         if (ieee80211_privacy_mismatch(dev, ifsta)) {
1997                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1998                        "mixed-cell disabled - disassociate\n", dev->name);
1999
2000                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2001                 ieee80211_set_disassoc(dev, ifsta, 0);
2002         }
2003 }
2004
2005
2006 static void ieee80211_sta_reset_auth(struct net_device *dev,
2007                                      struct ieee80211_if_sta *ifsta)
2008 {
2009         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2010
2011         if (local->ops->reset_tsf) {
2012                 /* Reset own TSF to allow time synchronization work. */
2013                 local->ops->reset_tsf(local_to_hw(local));
2014         }
2015
2016         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2017
2018
2019         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2020                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2021         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2022                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2023         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2024                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2025         else
2026                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2027         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2028                ifsta->auth_alg);
2029         ifsta->auth_transaction = -1;
2030         ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2031         netif_carrier_off(dev);
2032 }
2033
2034
2035 void ieee80211_sta_req_auth(struct net_device *dev,
2036                             struct ieee80211_if_sta *ifsta)
2037 {
2038         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2039         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2040
2041         if (sdata->type != IEEE80211_IF_TYPE_STA)
2042                 return;
2043
2044         if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2045             (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2046                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2047                 queue_work(local->hw.workqueue, &ifsta->work);
2048         }
2049 }
2050
2051 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2052                                     const char *ssid, int ssid_len)
2053 {
2054         int tmp, hidden_ssid;
2055
2056         if (!memcmp(ifsta->ssid, ssid, ssid_len))
2057                 return 1;
2058
2059         if (ifsta->auto_bssid_sel)
2060                 return 0;
2061
2062         hidden_ssid = 1;
2063         tmp = ssid_len;
2064         while (tmp--) {
2065                 if (ssid[tmp] != '\0') {
2066                         hidden_ssid = 0;
2067                         break;
2068                 }
2069         }
2070
2071         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2072                 return 1;
2073
2074         if (ssid_len == 1 && ssid[0] == ' ')
2075                 return 1;
2076
2077         return 0;
2078 }
2079
2080 static int ieee80211_sta_config_auth(struct net_device *dev,
2081                                      struct ieee80211_if_sta *ifsta)
2082 {
2083         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2084         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2085         struct ieee80211_sta_bss *bss, *selected = NULL;
2086         int top_rssi = 0, freq;
2087
2088         if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2089             !ifsta->auto_ssid_sel) {
2090                 ifsta->state = IEEE80211_AUTHENTICATE;
2091                 ieee80211_sta_reset_auth(dev, ifsta);
2092                 return 0;
2093         }
2094
2095         spin_lock_bh(&local->sta_bss_lock);
2096         freq = local->oper_channel->freq;
2097         list_for_each_entry(bss, &local->sta_bss_list, list) {
2098                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2099                         continue;
2100
2101                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2102                     !!sdata->default_key)
2103                         continue;
2104
2105                 if (!ifsta->auto_channel_sel && bss->freq != freq)
2106                         continue;
2107
2108                 if (!ifsta->auto_bssid_sel &&
2109                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2110                         continue;
2111
2112                 if (!ifsta->auto_ssid_sel &&
2113                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2114                         continue;
2115
2116                 if (!selected || top_rssi < bss->rssi) {
2117                         selected = bss;
2118                         top_rssi = bss->rssi;
2119                 }
2120         }
2121         if (selected)
2122                 atomic_inc(&selected->users);
2123         spin_unlock_bh(&local->sta_bss_lock);
2124
2125         if (selected) {
2126                 ieee80211_set_channel(local, -1, selected->freq);
2127                 if (!ifsta->ssid_set)
2128                         ieee80211_sta_set_ssid(dev, selected->ssid,
2129                                                selected->ssid_len);
2130                 ieee80211_sta_set_bssid(dev, selected->bssid);
2131                 ieee80211_rx_bss_put(dev, selected);
2132                 ifsta->state = IEEE80211_AUTHENTICATE;
2133                 ieee80211_sta_reset_auth(dev, ifsta);
2134                 return 0;
2135         } else {
2136                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2137                         if (ifsta->auto_ssid_sel)
2138                                 ieee80211_sta_start_scan(dev, NULL, 0);
2139                         else
2140                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2141                                                          ifsta->ssid_len);
2142                         ifsta->state = IEEE80211_AUTHENTICATE;
2143                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2144                 } else
2145                         ifsta->state = IEEE80211_DISABLED;
2146         }
2147         return -1;
2148 }
2149
2150 static int ieee80211_sta_join_ibss(struct net_device *dev,
2151                                    struct ieee80211_if_sta *ifsta,
2152                                    struct ieee80211_sta_bss *bss)
2153 {
2154         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155         int res, rates, i, j;
2156         struct sk_buff *skb;
2157         struct ieee80211_mgmt *mgmt;
2158         struct ieee80211_tx_control control;
2159         struct ieee80211_rate *rate;
2160         struct ieee80211_hw_mode *mode;
2161         struct rate_control_extra extra;
2162         u8 *pos;
2163         struct ieee80211_sub_if_data *sdata;
2164
2165         /* Remove possible STA entries from other IBSS networks. */
2166         sta_info_flush(local, NULL);
2167
2168         if (local->ops->reset_tsf) {
2169                 /* Reset own TSF to allow time synchronization work. */
2170                 local->ops->reset_tsf(local_to_hw(local));
2171         }
2172         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2173         res = ieee80211_if_config(dev);
2174         if (res)
2175                 return res;
2176
2177         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2178
2179         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2180         sdata->drop_unencrypted = bss->capability &
2181                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2182
2183         res = ieee80211_set_channel(local, -1, bss->freq);
2184
2185         if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2186                 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2187                        "(%d MHz)\n", dev->name, local->hw.conf.channel,
2188                        local->hw.conf.freq);
2189                 return -1;
2190         }
2191
2192         /* Set beacon template based on scan results */
2193         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2194         do {
2195                 if (!skb)
2196                         break;
2197
2198                 skb_reserve(skb, local->hw.extra_tx_headroom);
2199
2200                 mgmt = (struct ieee80211_mgmt *)
2201                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2202                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2203                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2204                                                    IEEE80211_STYPE_BEACON);
2205                 memset(mgmt->da, 0xff, ETH_ALEN);
2206                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2207                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2208                 mgmt->u.beacon.beacon_int =
2209                         cpu_to_le16(local->hw.conf.beacon_int);
2210                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2211
2212                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2213                 *pos++ = WLAN_EID_SSID;
2214                 *pos++ = ifsta->ssid_len;
2215                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2216
2217                 rates = bss->supp_rates_len;
2218                 if (rates > 8)
2219                         rates = 8;
2220                 pos = skb_put(skb, 2 + rates);
2221                 *pos++ = WLAN_EID_SUPP_RATES;
2222                 *pos++ = rates;
2223                 memcpy(pos, bss->supp_rates, rates);
2224
2225                 pos = skb_put(skb, 2 + 1);
2226                 *pos++ = WLAN_EID_DS_PARAMS;
2227                 *pos++ = 1;
2228                 *pos++ = bss->channel;
2229
2230                 pos = skb_put(skb, 2 + 2);
2231                 *pos++ = WLAN_EID_IBSS_PARAMS;
2232                 *pos++ = 2;
2233                 /* FIX: set ATIM window based on scan results */
2234                 *pos++ = 0;
2235                 *pos++ = 0;
2236
2237                 if (bss->supp_rates_len > 8) {
2238                         rates = bss->supp_rates_len - 8;
2239                         pos = skb_put(skb, 2 + rates);
2240                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2241                         *pos++ = rates;
2242                         memcpy(pos, &bss->supp_rates[8], rates);
2243                 }
2244
2245                 memset(&control, 0, sizeof(control));
2246                 memset(&extra, 0, sizeof(extra));
2247                 extra.mode = local->oper_hw_mode;
2248                 rate = rate_control_get_rate(local, dev, skb, &extra);
2249                 if (!rate) {
2250                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2251                                "for IBSS beacon\n", dev->name);
2252                         break;
2253                 }
2254                 control.tx_rate = (local->short_preamble &&
2255                                    (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2256                         rate->val2 : rate->val;
2257                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2258                 control.power_level = local->hw.conf.power_level;
2259                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2260                 control.retry_limit = 1;
2261
2262                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2263                 if (ifsta->probe_resp) {
2264                         mgmt = (struct ieee80211_mgmt *)
2265                                 ifsta->probe_resp->data;
2266                         mgmt->frame_control =
2267                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2268                                              IEEE80211_STYPE_PROBE_RESP);
2269                 } else {
2270                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2271                                "template for IBSS\n", dev->name);
2272                 }
2273
2274                 if (local->ops->beacon_update &&
2275                     local->ops->beacon_update(local_to_hw(local),
2276                                              skb, &control) == 0) {
2277                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2278                                "template based on scan results\n", dev->name);
2279                         skb = NULL;
2280                 }
2281
2282                 rates = 0;
2283                 mode = local->oper_hw_mode;
2284                 for (i = 0; i < bss->supp_rates_len; i++) {
2285                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2286                         if (mode->mode == MODE_ATHEROS_TURBO)
2287                                 bitrate *= 2;
2288                         for (j = 0; j < mode->num_rates; j++)
2289                                 if (mode->rates[j].rate == bitrate)
2290                                         rates |= BIT(j);
2291                 }
2292                 ifsta->supp_rates_bits = rates;
2293         } while (0);
2294
2295         if (skb) {
2296                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2297                        "template\n", dev->name);
2298                 dev_kfree_skb(skb);
2299         }
2300
2301         ifsta->state = IEEE80211_IBSS_JOINED;
2302         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2303
2304         ieee80211_rx_bss_put(dev, bss);
2305
2306         return res;
2307 }
2308
2309
2310 static int ieee80211_sta_create_ibss(struct net_device *dev,
2311                                      struct ieee80211_if_sta *ifsta)
2312 {
2313         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2314         struct ieee80211_sta_bss *bss;
2315         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2316         struct ieee80211_hw_mode *mode;
2317         u8 bssid[ETH_ALEN], *pos;
2318         int i;
2319
2320 #if 0
2321         /* Easier testing, use fixed BSSID. */
2322         memset(bssid, 0xfe, ETH_ALEN);
2323 #else
2324         /* Generate random, not broadcast, locally administered BSSID. Mix in
2325          * own MAC address to make sure that devices that do not have proper
2326          * random number generator get different BSSID. */
2327         get_random_bytes(bssid, ETH_ALEN);
2328         for (i = 0; i < ETH_ALEN; i++)
2329                 bssid[i] ^= dev->dev_addr[i];
2330         bssid[0] &= ~0x01;
2331         bssid[0] |= 0x02;
2332 #endif
2333
2334         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2335                dev->name, MAC_ARG(bssid));
2336
2337         bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2338                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2339         if (!bss)
2340                 return -ENOMEM;
2341
2342         mode = local->oper_hw_mode;
2343
2344         if (local->hw.conf.beacon_int == 0)
2345                 local->hw.conf.beacon_int = 100;
2346         bss->beacon_int = local->hw.conf.beacon_int;
2347         bss->hw_mode = local->hw.conf.phymode;
2348         bss->freq = local->hw.conf.freq;
2349         bss->last_update = jiffies;
2350         bss->capability = WLAN_CAPABILITY_IBSS;
2351         if (sdata->default_key) {
2352                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2353         } else
2354                 sdata->drop_unencrypted = 0;
2355         bss->supp_rates_len = mode->num_rates;
2356         pos = bss->supp_rates;
2357         for (i = 0; i < mode->num_rates; i++) {
2358                 int rate = mode->rates[i].rate;
2359                 if (mode->mode == MODE_ATHEROS_TURBO)
2360                         rate /= 2;
2361                 *pos++ = (u8) (rate / 5);
2362         }
2363
2364         return ieee80211_sta_join_ibss(dev, ifsta, bss);
2365 }
2366
2367
2368 static int ieee80211_sta_find_ibss(struct net_device *dev,
2369                                    struct ieee80211_if_sta *ifsta)
2370 {
2371         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2372         struct ieee80211_sta_bss *bss;
2373         int found = 0;
2374         u8 bssid[ETH_ALEN];
2375         int active_ibss;
2376
2377         if (ifsta->ssid_len == 0)
2378                 return -EINVAL;
2379
2380         active_ibss = ieee80211_sta_active_ibss(dev);
2381 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2382         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2383                dev->name, active_ibss);
2384 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2385         spin_lock_bh(&local->sta_bss_lock);
2386         list_for_each_entry(bss, &local->sta_bss_list, list) {
2387                 if (ifsta->ssid_len != bss->ssid_len ||
2388                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2389                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
2390                         continue;
2391 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2392                 printk(KERN_DEBUG "   bssid=" MAC_FMT " found\n",
2393                        MAC_ARG(bss->bssid));
2394 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2395                 memcpy(bssid, bss->bssid, ETH_ALEN);
2396                 found = 1;
2397                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2398                         break;
2399         }
2400         spin_unlock_bh(&local->sta_bss_lock);
2401
2402 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2403         printk(KERN_DEBUG "   sta_find_ibss: selected " MAC_FMT " current "
2404                MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2405 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2406         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2407             (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2408                                         ifsta->ssid, ifsta->ssid_len))) {
2409                 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2410                        " based on configured SSID\n",
2411                        dev->name, MAC_ARG(bssid));
2412                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2413         }
2414 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2415         printk(KERN_DEBUG "   did not try to join ibss\n");
2416 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2417
2418         /* Selected IBSS not found in current scan results - try to scan */
2419         if (ifsta->state == IEEE80211_IBSS_JOINED &&
2420             !ieee80211_sta_active_ibss(dev)) {
2421                 mod_timer(&ifsta->timer, jiffies +
2422                                       IEEE80211_IBSS_MERGE_INTERVAL);
2423         } else if (time_after(jiffies, local->last_scan_completed +
2424                               IEEE80211_SCAN_INTERVAL)) {
2425                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2426                        "join\n", dev->name);
2427                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2428                                               ifsta->ssid_len);
2429         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2430                 int interval = IEEE80211_SCAN_INTERVAL;
2431
2432                 if (time_after(jiffies, ifsta->ibss_join_req +
2433                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
2434                         if (ifsta->create_ibss &&
2435                             local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2436                                 return ieee80211_sta_create_ibss(dev, ifsta);
2437                         if (ifsta->create_ibss) {
2438                                 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2439                                        " configured channel %d (%d MHz)\n",
2440                                        dev->name, local->hw.conf.channel,
2441                                        local->hw.conf.freq);
2442                         }
2443
2444                         /* No IBSS found - decrease scan interval and continue
2445                          * scanning. */
2446                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
2447                 }
2448
2449                 ifsta->state = IEEE80211_IBSS_SEARCH;
2450                 mod_timer(&ifsta->timer, jiffies + interval);
2451                 return 0;
2452         }
2453
2454         return 0;
2455 }
2456
2457
2458 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2459 {
2460         struct ieee80211_sub_if_data *sdata;
2461         struct ieee80211_if_sta *ifsta;
2462         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2463
2464         if (len > IEEE80211_MAX_SSID_LEN)
2465                 return -EINVAL;
2466
2467         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2468          * not defined. */
2469         if (local->ops->conf_tx) {
2470                 struct ieee80211_tx_queue_params qparam;
2471                 int i;
2472
2473                 memset(&qparam, 0, sizeof(qparam));
2474                 /* TODO: are these ok defaults for all hw_modes? */
2475                 qparam.aifs = 2;
2476                 qparam.cw_min =
2477                         local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2478                 qparam.cw_max = 1023;
2479                 qparam.burst_time = 0;
2480                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2481                 {
2482                         local->ops->conf_tx(local_to_hw(local),
2483                                            i + IEEE80211_TX_QUEUE_DATA0,
2484                                            &qparam);
2485                 }
2486                 /* IBSS uses different parameters for Beacon sending */
2487                 qparam.cw_min++;
2488                 qparam.cw_min *= 2;
2489                 qparam.cw_min--;
2490                 local->ops->conf_tx(local_to_hw(local),
2491                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
2492         }
2493
2494         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2495         ifsta = &sdata->u.sta;
2496
2497         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2498                 ifsta->prev_bssid_set = 0;
2499         memcpy(ifsta->ssid, ssid, len);
2500         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2501         ifsta->ssid_len = len;
2502
2503         ifsta->ssid_set = len ? 1 : 0;
2504         if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2505                 ifsta->ibss_join_req = jiffies;
2506                 ifsta->state = IEEE80211_IBSS_SEARCH;
2507                 return ieee80211_sta_find_ibss(dev, ifsta);
2508         }
2509         return 0;
2510 }
2511
2512
2513 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2514 {
2515         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2516         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2517         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2518         *len = ifsta->ssid_len;
2519         return 0;
2520 }
2521
2522
2523 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2524 {
2525         struct ieee80211_sub_if_data *sdata;
2526         struct ieee80211_if_sta *ifsta;
2527         int res;
2528
2529         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2530         ifsta = &sdata->u.sta;
2531
2532         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2533                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2534                 res = ieee80211_if_config(dev);
2535                 if (res) {
2536                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2537                                "the low-level driver\n", dev->name);
2538                         return res;
2539                 }
2540         }
2541
2542         if (!is_valid_ether_addr(bssid))
2543                 ifsta->bssid_set = 0;
2544         else
2545                 ifsta->bssid_set = 1;
2546         return 0;
2547 }
2548
2549
2550 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2551                                     struct ieee80211_sub_if_data *sdata,
2552                                     int powersave)
2553 {
2554         struct sk_buff *skb;
2555         struct ieee80211_hdr *nullfunc;
2556         u16 fc;
2557
2558         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2559         if (!skb) {
2560                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2561                        "frame\n", sdata->dev->name);
2562                 return;
2563         }
2564         skb_reserve(skb, local->hw.extra_tx_headroom);
2565
2566         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2567         memset(nullfunc, 0, 24);
2568         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2569              IEEE80211_FCTL_TODS;
2570         if (powersave)
2571                 fc |= IEEE80211_FCTL_PM;
2572         nullfunc->frame_control = cpu_to_le16(fc);
2573         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2574         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2575         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2576
2577         ieee80211_sta_tx(sdata->dev, skb, 0);
2578 }
2579
2580
2581 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2582 {
2583         struct ieee80211_local *local = hw_to_local(hw);
2584         struct net_device *dev = local->scan_dev;
2585         struct ieee80211_sub_if_data *sdata;
2586         union iwreq_data wrqu;
2587
2588         local->last_scan_completed = jiffies;
2589         wmb();
2590         local->sta_scanning = 0;
2591
2592         if (ieee80211_hw_config(local))
2593                 printk(KERN_DEBUG "%s: failed to restore operational"
2594                        "channel after scan\n", dev->name);
2595
2596         if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2597             ieee80211_if_config(dev))
2598                 printk(KERN_DEBUG "%s: failed to restore operational"
2599                        "BSSID after scan\n", dev->name);
2600
2601         memset(&wrqu, 0, sizeof(wrqu));
2602         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2603
2604         read_lock(&local->sub_if_lock);
2605         list_for_each_entry(sdata, &local->sub_if_list, list) {
2606
2607                 /* No need to wake the master device. */
2608                 if (sdata->dev == local->mdev)
2609                         continue;
2610
2611                 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2612                         if (sdata->u.sta.associated)
2613                                 ieee80211_send_nullfunc(local, sdata, 0);
2614                         ieee80211_sta_timer((unsigned long)sdata);
2615                 }
2616
2617                 netif_wake_queue(sdata->dev);
2618         }
2619         read_unlock(&local->sub_if_lock);
2620
2621         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2622         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2623                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2624                 if (!ifsta->bssid_set ||
2625                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
2626                     !ieee80211_sta_active_ibss(dev)))
2627                         ieee80211_sta_find_ibss(dev, ifsta);
2628         }
2629 }
2630 EXPORT_SYMBOL(ieee80211_scan_completed);
2631
2632 void ieee80211_sta_scan_work(struct work_struct *work)
2633 {
2634         struct ieee80211_local *local =
2635                 container_of(work, struct ieee80211_local, scan_work.work);
2636         struct net_device *dev = local->scan_dev;
2637         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2638         struct ieee80211_hw_mode *mode;
2639         struct ieee80211_channel *chan;
2640         int skip;
2641         unsigned long next_delay = 0;
2642
2643         if (!local->sta_scanning)
2644                 return;
2645
2646         switch (local->scan_state) {
2647         case SCAN_SET_CHANNEL:
2648                 mode = local->scan_hw_mode;
2649                 if (local->scan_hw_mode->list.next == &local->modes_list &&
2650                     local->scan_channel_idx >= mode->num_channels) {
2651                         ieee80211_scan_completed(local_to_hw(local));
2652                         return;
2653                 }
2654                 skip = !(local->enabled_modes & (1 << mode->mode));
2655                 chan = &mode->channels[local->scan_channel_idx];
2656                 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2657                     (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2658                      !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2659                     (local->hw_modes & local->enabled_modes &
2660                      (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2661                         skip = 1;
2662
2663                 if (!skip) {
2664 #if 0
2665                         printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2666                                dev->name, chan->chan, chan->freq);
2667 #endif
2668
2669                         local->scan_channel = chan;
2670                         if (ieee80211_hw_config(local)) {
2671                                 printk(KERN_DEBUG "%s: failed to set channel "
2672                                        "%d (%d MHz) for scan\n", dev->name,
2673                                        chan->chan, chan->freq);
2674                                 skip = 1;
2675                         }
2676                 }
2677
2678                 local->scan_channel_idx++;
2679                 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2680                         if (local->scan_hw_mode->list.next != &local->modes_list) {
2681                                 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2682                                                                  struct ieee80211_hw_mode,
2683                                                                  list);
2684                                 local->scan_channel_idx = 0;
2685                         }
2686                 }
2687
2688                 if (skip)
2689                         break;
2690
2691                 next_delay = IEEE80211_PROBE_DELAY +
2692                              usecs_to_jiffies(local->hw.channel_change_time);
2693                 local->scan_state = SCAN_SEND_PROBE;
2694                 break;
2695         case SCAN_SEND_PROBE:
2696                 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2697                         ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2698                                                  local->scan_ssid_len);
2699                         next_delay = IEEE80211_CHANNEL_TIME;
2700                 } else
2701                         next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2702                 local->scan_state = SCAN_SET_CHANNEL;
2703                 break;
2704         }
2705
2706         if (local->sta_scanning)
2707                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2708                                    next_delay);
2709 }
2710
2711
2712 static int ieee80211_sta_start_scan(struct net_device *dev,
2713                                     u8 *ssid, size_t ssid_len)
2714 {
2715         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2716         struct ieee80211_sub_if_data *sdata;
2717
2718         if (ssid_len > IEEE80211_MAX_SSID_LEN)
2719                 return -EINVAL;
2720
2721         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
2722          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2723          * BSSID: MACAddress
2724          * SSID
2725          * ScanType: ACTIVE, PASSIVE
2726          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2727          *    a Probe frame during active scanning
2728          * ChannelList
2729          * MinChannelTime (>= ProbeDelay), in TU
2730          * MaxChannelTime: (>= MinChannelTime), in TU
2731          */
2732
2733          /* MLME-SCAN.confirm
2734           * BSSDescriptionSet
2735           * ResultCode: SUCCESS, INVALID_PARAMETERS
2736          */
2737
2738         if (local->sta_scanning) {
2739                 if (local->scan_dev == dev)
2740                         return 0;
2741                 return -EBUSY;
2742         }
2743
2744         if (local->ops->hw_scan) {
2745                 int rc = local->ops->hw_scan(local_to_hw(local),
2746                                             ssid, ssid_len);
2747                 if (!rc) {
2748                         local->sta_scanning = 1;
2749                         local->scan_dev = dev;
2750                 }
2751                 return rc;
2752         }
2753
2754         local->sta_scanning = 1;
2755
2756         read_lock(&local->sub_if_lock);
2757         list_for_each_entry(sdata, &local->sub_if_list, list) {
2758
2759                 /* Don't stop the master interface, otherwise we can't transmit
2760                  * probes! */
2761                 if (sdata->dev == local->mdev)
2762                         continue;
2763
2764                 netif_stop_queue(sdata->dev);
2765                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2766                     sdata->u.sta.associated)
2767                         ieee80211_send_nullfunc(local, sdata, 1);
2768         }
2769         read_unlock(&local->sub_if_lock);
2770
2771         if (ssid) {
2772                 local->scan_ssid_len = ssid_len;
2773                 memcpy(local->scan_ssid, ssid, ssid_len);
2774         } else
2775                 local->scan_ssid_len = 0;
2776         local->scan_state = SCAN_SET_CHANNEL;
2777         local->scan_hw_mode = list_entry(local->modes_list.next,
2778                                          struct ieee80211_hw_mode,
2779                                          list);
2780         local->scan_channel_idx = 0;
2781         local->scan_dev = dev;
2782
2783         if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2784             ieee80211_if_config(dev))
2785                 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2786                        dev->name);
2787
2788         /* TODO: start scan as soon as all nullfunc frames are ACKed */
2789         queue_delayed_work(local->hw.workqueue, &local->scan_work,
2790                            IEEE80211_CHANNEL_TIME);
2791
2792         return 0;
2793 }
2794
2795
2796 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2797 {
2798         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2799         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2800         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2801
2802         if (sdata->type != IEEE80211_IF_TYPE_STA)
2803                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2804
2805         if (local->sta_scanning) {
2806                 if (local->scan_dev == dev)
2807                         return 0;
2808                 return -EBUSY;
2809         }
2810
2811         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2812         queue_work(local->hw.workqueue, &ifsta->work);
2813         return 0;
2814 }
2815
2816 static char *
2817 ieee80211_sta_scan_result(struct net_device *dev,
2818                           struct ieee80211_sta_bss *bss,
2819                           char *current_ev, char *end_buf)
2820 {
2821         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2822         struct iw_event iwe;
2823
2824         if (time_after(jiffies,
2825                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2826                 return current_ev;
2827
2828         if (!(local->enabled_modes & (1 << bss->hw_mode)))
2829                 return current_ev;
2830
2831         if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2832             !bss->wpa_ie && !bss->rsn_ie)
2833                 return current_ev;
2834
2835         if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2836             (local->scan_ssid_len != bss->ssid_len ||
2837              memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2838                 return current_ev;
2839
2840         memset(&iwe, 0, sizeof(iwe));
2841         iwe.cmd = SIOCGIWAP;
2842         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2843         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2844         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2845                                           IW_EV_ADDR_LEN);
2846
2847         memset(&iwe, 0, sizeof(iwe));
2848         iwe.cmd = SIOCGIWESSID;
2849         iwe.u.data.length = bss->ssid_len;
2850         iwe.u.data.flags = 1;
2851         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2852                                           bss->ssid);
2853
2854         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2855                 memset(&iwe, 0, sizeof(iwe));
2856                 iwe.cmd = SIOCGIWMODE;
2857                 if (bss->capability & WLAN_CAPABILITY_ESS)
2858                         iwe.u.mode = IW_MODE_MASTER;
2859                 else
2860                         iwe.u.mode = IW_MODE_ADHOC;
2861                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2862                                                   IW_EV_UINT_LEN);
2863         }
2864
2865         memset(&iwe, 0, sizeof(iwe));
2866         iwe.cmd = SIOCGIWFREQ;
2867         iwe.u.freq.m = bss->channel;
2868         iwe.u.freq.e = 0;
2869         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2870                                           IW_EV_FREQ_LEN);
2871         iwe.u.freq.m = bss->freq * 100000;
2872         iwe.u.freq.e = 1;
2873         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2874                                           IW_EV_FREQ_LEN);
2875
2876         memset(&iwe, 0, sizeof(iwe));
2877         iwe.cmd = IWEVQUAL;
2878         iwe.u.qual.qual = bss->signal;
2879         iwe.u.qual.level = bss->rssi;
2880         iwe.u.qual.noise = bss->noise;
2881         iwe.u.qual.updated = local->wstats_flags;
2882         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2883                                           IW_EV_QUAL_LEN);
2884
2885         memset(&iwe, 0, sizeof(iwe));
2886         iwe.cmd = SIOCGIWENCODE;
2887         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2888                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2889         else
2890                 iwe.u.data.flags = IW_ENCODE_DISABLED;
2891         iwe.u.data.length = 0;
2892         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2893
2894         if (bss && bss->wpa_ie) {
2895                 memset(&iwe, 0, sizeof(iwe));
2896                 iwe.cmd = IWEVGENIE;
2897                 iwe.u.data.length = bss->wpa_ie_len;
2898                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2899                                                   bss->wpa_ie);
2900         }
2901
2902         if (bss && bss->rsn_ie) {
2903                 memset(&iwe, 0, sizeof(iwe));
2904                 iwe.cmd = IWEVGENIE;
2905                 iwe.u.data.length = bss->rsn_ie_len;
2906                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2907                                                   bss->rsn_ie);
2908         }
2909
2910         if (bss && bss->supp_rates_len > 0) {
2911                 /* display all supported rates in readable format */
2912                 char *p = current_ev + IW_EV_LCP_LEN;
2913                 int i;
2914
2915                 memset(&iwe, 0, sizeof(iwe));
2916                 iwe.cmd = SIOCGIWRATE;
2917                 /* Those two flags are ignored... */
2918                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2919
2920                 for (i = 0; i < bss->supp_rates_len; i++) {
2921                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
2922                                                         0x7f) * 500000);
2923                         p = iwe_stream_add_value(current_ev, p,
2924                                         end_buf, &iwe, IW_EV_PARAM_LEN);
2925                 }
2926                 current_ev = p;
2927         }
2928
2929         if (bss) {
2930                 char *buf;
2931                 buf = kmalloc(30, GFP_ATOMIC);
2932                 if (buf) {
2933                         memset(&iwe, 0, sizeof(iwe));
2934                         iwe.cmd = IWEVCUSTOM;
2935                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2936                         iwe.u.data.length = strlen(buf);
2937                         current_ev = iwe_stream_add_point(current_ev, end_buf,
2938                                                           &iwe, buf);
2939                         kfree(buf);
2940                 }
2941         }
2942
2943         do {
2944                 char *buf;
2945
2946                 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2947                         break;
2948
2949                 buf = kmalloc(100, GFP_ATOMIC);
2950                 if (!buf)
2951                         break;
2952
2953                 memset(&iwe, 0, sizeof(iwe));
2954                 iwe.cmd = IWEVCUSTOM;
2955                 sprintf(buf, "bcn_int=%d", bss->beacon_int);
2956                 iwe.u.data.length = strlen(buf);
2957                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2958                                                   buf);
2959
2960                 memset(&iwe, 0, sizeof(iwe));
2961                 iwe.cmd = IWEVCUSTOM;
2962                 sprintf(buf, "capab=0x%04x", bss->capability);
2963                 iwe.u.data.length = strlen(buf);
2964                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2965                                                   buf);
2966
2967                 kfree(buf);
2968                 break;
2969         } while (0);
2970
2971         return current_ev;
2972 }
2973
2974
2975 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
2976 {
2977         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2978         char *current_ev = buf;
2979         char *end_buf = buf + len;
2980         struct ieee80211_sta_bss *bss;
2981
2982         spin_lock_bh(&local->sta_bss_lock);
2983         list_for_each_entry(bss, &local->sta_bss_list, list) {
2984                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
2985                         spin_unlock_bh(&local->sta_bss_lock);
2986                         return -E2BIG;
2987                 }
2988                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
2989                                                        end_buf);
2990         }
2991         spin_unlock_bh(&local->sta_bss_lock);
2992         return current_ev - buf;
2993 }
2994
2995
2996 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
2997 {
2998         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2999         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3000         kfree(ifsta->extra_ie);
3001         if (len == 0) {
3002                 ifsta->extra_ie = NULL;
3003                 ifsta->extra_ie_len = 0;
3004                 return 0;
3005         }
3006         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3007         if (!ifsta->extra_ie) {
3008                 ifsta->extra_ie_len = 0;
3009                 return -ENOMEM;
3010         }
3011         memcpy(ifsta->extra_ie, ie, len);
3012         ifsta->extra_ie_len = len;
3013         return 0;
3014 }
3015
3016
3017 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3018                                          struct sk_buff *skb, u8 *bssid,
3019                                          u8 *addr)
3020 {
3021         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3022         struct sta_info *sta;
3023         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3024
3025         /* TODO: Could consider removing the least recently used entry and
3026          * allow new one to be added. */
3027         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3028                 if (net_ratelimit()) {
3029                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3030                                "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3031                 }
3032                 return NULL;
3033         }
3034
3035         printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3036                local->mdev->name, MAC_ARG(addr), dev->name);
3037
3038         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3039         if (!sta)
3040                 return NULL;
3041
3042         sta->supp_rates = sdata->u.sta.supp_rates_bits;
3043
3044         rate_control_rate_init(sta, local);
3045
3046         return sta; /* caller will call sta_info_put() */
3047 }
3048
3049
3050 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3051 {
3052         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3053         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3054
3055         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3056                dev->name, reason);
3057
3058         if (sdata->type != IEEE80211_IF_TYPE_STA &&
3059             sdata->type != IEEE80211_IF_TYPE_IBSS)
3060                 return -EINVAL;
3061
3062         ieee80211_send_deauth(dev, ifsta, reason);
3063         ieee80211_set_disassoc(dev, ifsta, 1);
3064         return 0;
3065 }
3066
3067
3068 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3069 {
3070         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3071         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3072
3073         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3074                dev->name, reason);
3075
3076         if (sdata->type != IEEE80211_IF_TYPE_STA)
3077                 return -EINVAL;
3078
3079         if (!ifsta->associated)
3080                 return -1;
3081
3082         ieee80211_send_disassoc(dev, ifsta, reason);
3083         ieee80211_set_disassoc(dev, ifsta, 0);
3084         return 0;
3085 }