net/mac80211/ieee80211_sta.c

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