net/mac80211/ieee80211_sta.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <net/iw_handler.h>
  28 #include <asm/types.h>
  29
  30 #include <net/mac80211.h>
  31 #include "ieee80211_i.h"
  32 #include "ieee80211_rate.h"
  33 #include "ieee80211_led.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  36 #define IEEE80211_AUTH_MAX_TRIES 3
  37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  38 #define IEEE80211_ASSOC_MAX_TRIES 3
  39 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  40 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  41 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  42 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  43 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  44 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  45
  46 #define IEEE80211_PROBE_DELAY (HZ / 33)
  47 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  48 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  49 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  50 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  51 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  52
  53 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  54
  55
  56 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  57
  58 #define ERP_INFO_USE_PROTECTION BIT(1)
  59
  60 /* mgmt header + 1 byte action code */
  61 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  62
  63 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  64 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  65 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  66
  67 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  68                                      u8 *ssid, size_t ssid_len);
  69 static struct ieee80211_sta_bss *
  70 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
  71                      u8 *ssid, u8 ssid_len);
  72 static void ieee80211_rx_bss_put(struct net_device *dev,
  73                                  struct ieee80211_sta_bss *bss);
  74 static int ieee80211_sta_find_ibss(struct net_device *dev,
  75                                    struct ieee80211_if_sta *ifsta);
  76 static int ieee80211_sta_wep_configured(struct net_device *dev);
  77 static int ieee80211_sta_start_scan(struct net_device *dev,
  78                                     u8 *ssid, size_t ssid_len);
  79 static int ieee80211_sta_config_auth(struct net_device *dev,
  80                                      struct ieee80211_if_sta *ifsta);
  81
  82
  83 /* Parsed Information Elements */
  84 struct ieee802_11_elems {
  85         /* pointers to IEs */
  86         u8 *ssid;
  87         u8 *supp_rates;
  88         u8 *fh_params;
  89         u8 *ds_params;
  90         u8 *cf_params;
  91         u8 *tim;
  92         u8 *ibss_params;
  93         u8 *challenge;
  94         u8 *wpa;
  95         u8 *rsn;
  96         u8 *erp_info;
  97         u8 *ext_supp_rates;
  98         u8 *wmm_info;
  99         u8 *wmm_param;
 100         u8 *ht_cap_elem;
 101         u8 *ht_info_elem;
 102         /* length of them, respectively */
 103         u8 ssid_len;
 104         u8 supp_rates_len;
 105         u8 fh_params_len;
 106         u8 ds_params_len;
 107         u8 cf_params_len;
 108         u8 tim_len;
 109         u8 ibss_params_len;
 110         u8 challenge_len;
 111         u8 wpa_len;
 112         u8 rsn_len;
 113         u8 erp_info_len;
 114         u8 ext_supp_rates_len;
 115         u8 wmm_info_len;
 116         u8 wmm_param_len;
 117         u8 ht_cap_elem_len;
 118         u8 ht_info_elem_len;
 119 };
 120
 121 static void ieee802_11_parse_elems(u8 *start, size_t len,
 122                                    struct ieee802_11_elems *elems)
 123 {
 124         size_t left = len;
 125         u8 *pos = start;
 126
 127         memset(elems, 0, sizeof(*elems));
 128
 129         while (left >= 2) {
 130                 u8 id, elen;
 131
 132                 id = *pos++;
 133                 elen = *pos++;
 134                 left -= 2;
 135
 136                 if (elen > left)
 137                         return;
 138
 139                 switch (id) {
 140                 case WLAN_EID_SSID:
 141                         elems->ssid = pos;
 142                         elems->ssid_len = elen;
 143                         break;
 144                 case WLAN_EID_SUPP_RATES:
 145                         elems->supp_rates = pos;
 146                         elems->supp_rates_len = elen;
 147                         break;
 148                 case WLAN_EID_FH_PARAMS:
 149                         elems->fh_params = pos;
 150                         elems->fh_params_len = elen;
 151                         break;
 152                 case WLAN_EID_DS_PARAMS:
 153                         elems->ds_params = pos;
 154                         elems->ds_params_len = elen;
 155                         break;
 156                 case WLAN_EID_CF_PARAMS:
 157                         elems->cf_params = pos;
 158                         elems->cf_params_len = elen;
 159                         break;
 160                 case WLAN_EID_TIM:
 161                         elems->tim = pos;
 162                         elems->tim_len = elen;
 163                         break;
 164                 case WLAN_EID_IBSS_PARAMS:
 165                         elems->ibss_params = pos;
 166                         elems->ibss_params_len = elen;
 167                         break;
 168                 case WLAN_EID_CHALLENGE:
 169                         elems->challenge = pos;
 170                         elems->challenge_len = elen;
 171                         break;
 172                 case WLAN_EID_WPA:
 173                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 174                             pos[2] == 0xf2) {
 175                                 /* Microsoft OUI (00:50:F2) */
 176                                 if (pos[3] == 1) {
 177                                         /* OUI Type 1 - WPA IE */
 178                                         elems->wpa = pos;
 179                                         elems->wpa_len = elen;
 180                                 } else if (elen >= 5 && pos[3] == 2) {
 181                                         if (pos[4] == 0) {
 182                                                 elems->wmm_info = pos;
 183                                                 elems->wmm_info_len = elen;
 184                                         } else if (pos[4] == 1) {
 185                                                 elems->wmm_param = pos;
 186                                                 elems->wmm_param_len = elen;
 187                                         }
 188                                 }
 189                         }
 190                         break;
 191                 case WLAN_EID_RSN:
 192                         elems->rsn = pos;
 193                         elems->rsn_len = elen;
 194                         break;
 195                 case WLAN_EID_ERP_INFO:
 196                         elems->erp_info = pos;
 197                         elems->erp_info_len = elen;
 198                         break;
 199                 case WLAN_EID_EXT_SUPP_RATES:
 200                         elems->ext_supp_rates = pos;
 201                         elems->ext_supp_rates_len = elen;
 202                         break;
 203                 case WLAN_EID_HT_CAPABILITY:
 204                         elems->ht_cap_elem = pos;
 205                         elems->ht_cap_elem_len = elen;
 206                         break;
 207                 case WLAN_EID_HT_EXTRA_INFO:
 208                         elems->ht_info_elem = pos;
 209                         elems->ht_info_elem_len = elen;
 210                         break;
 211                 default:
 212                         break;
 213                 }
 214
 215                 left -= elen;
 216                 pos += elen;
 217         }
 218 }
 219
 220
 221 static int ecw2cw(int ecw)
 222 {
 223         int cw = 1;
 224         while (ecw > 0) {
 225                 cw <<= 1;
 226                 ecw--;
 227         }
 228         return cw - 1;
 229 }
 230
 231 static void ieee80211_sta_wmm_params(struct net_device *dev,
 232                                      struct ieee80211_if_sta *ifsta,
 233                                      u8 *wmm_param, size_t wmm_param_len)
 234 {
 235         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 236         struct ieee80211_tx_queue_params params;
 237         size_t left;
 238         int count;
 239         u8 *pos;
 240
 241         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 242                 return;
 243         count = wmm_param[6] & 0x0f;
 244         if (count == ifsta->wmm_last_param_set)
 245                 return;
 246         ifsta->wmm_last_param_set = count;
 247
 248         pos = wmm_param + 8;
 249         left = wmm_param_len - 8;
 250
 251         memset(&params, 0, sizeof(params));
 252
 253         if (!local->ops->conf_tx)
 254                 return;
 255
 256         local->wmm_acm = 0;
 257         for (; left >= 4; left -= 4, pos += 4) {
 258                 int aci = (pos[0] >> 5) & 0x03;
 259                 int acm = (pos[0] >> 4) & 0x01;
 260                 int queue;
 261
 262                 switch (aci) {
 263                 case 1:
 264                         queue = IEEE80211_TX_QUEUE_DATA3;
 265                         if (acm) {
 266                                 local->wmm_acm |= BIT(0) | BIT(3);
 267                         }
 268                         break;
 269                 case 2:
 270                         queue = IEEE80211_TX_QUEUE_DATA1;
 271                         if (acm) {
 272                                 local->wmm_acm |= BIT(4) | BIT(5);
 273                         }
 274                         break;
 275                 case 3:
 276                         queue = IEEE80211_TX_QUEUE_DATA0;
 277                         if (acm) {
 278                                 local->wmm_acm |= BIT(6) | BIT(7);
 279                         }
 280                         break;
 281                 case 0:
 282                 default:
 283                         queue = IEEE80211_TX_QUEUE_DATA2;
 284                         if (acm) {
 285                                 local->wmm_acm |= BIT(1) | BIT(2);
 286                         }
 287                         break;
 288                 }
 289
 290                 params.aifs = pos[0] & 0x0f;
 291                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 292                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 293                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 294                 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 295                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 296                        "cWmin=%d cWmax=%d burst=%d\n",
 297                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 298                        params.cw_max, params.burst_time);
 299                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 300                  * AC for now) */
 301                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 302                         printk(KERN_DEBUG "%s: failed to set TX queue "
 303                                "parameters for queue %d\n", dev->name, queue);
 304                 }
 305         }
 306 }
 307
 308
 309 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
 310 {
 311         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 312         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 313         int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 314         int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 315         u8 changes = 0;
 316         DECLARE_MAC_BUF(mac);
 317
 318         if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
 319                 if (net_ratelimit()) {
 320                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 321                                "%s)\n",
 322                                dev->name,
 323                                use_protection ? "enabled" : "disabled",
 324                                print_mac(mac, ifsta->bssid));
 325                 }
 326                 if (use_protection)
 327                         sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
 328                 else
 329                         sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
 330                 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
 331         }
 332
 333         if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
 334                 if (net_ratelimit()) {
 335                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 336                                " (BSSID=%s)\n",
 337                                dev->name,
 338                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 339                                         "short" : "long",
 340                                print_mac(mac, ifsta->bssid));
 341                 }
 342                 if (preamble_mode)
 343                         sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
 344                 else
 345                         sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
 346                 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
 347         }
 348
 349         if (changes)
 350                 ieee80211_erp_info_change_notify(dev, changes);
 351 }
 352
 353 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 354                                    struct ieee80211_ht_info *ht_info)
 355 {
 356
 357         if (ht_info == NULL)
 358                 return -EINVAL;
 359
 360         memset(ht_info, 0, sizeof(*ht_info));
 361
 362         if (ht_cap_ie) {
 363                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 364
 365                 ht_info->ht_supported = 1;
 366                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 367                 ht_info->ampdu_factor =
 368                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 369                 ht_info->ampdu_density =
 370                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 371                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 372         } else
 373                 ht_info->ht_supported = 0;
 374
 375         return 0;
 376 }
 377
 378 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 379                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 380                         struct ieee80211_ht_bss_info *bss_info)
 381 {
 382         if (bss_info == NULL)
 383                 return -EINVAL;
 384
 385         memset(bss_info, 0, sizeof(*bss_info));
 386
 387         if (ht_add_info_ie) {
 388                 u16 op_mode;
 389                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 390
 391                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 392                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 393                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 394         }
 395
 396         return 0;
 397 }
 398
 399 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 400                                          struct ieee80211_if_sta *ifsta)
 401 {
 402         char *buf;
 403         size_t len;
 404         int i;
 405         union iwreq_data wrqu;
 406
 407         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 408                 return;
 409
 410         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 411                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 412         if (!buf)
 413                 return;
 414
 415         len = sprintf(buf, "ASSOCINFO(");
 416         if (ifsta->assocreq_ies) {
 417                 len += sprintf(buf + len, "ReqIEs=");
 418                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 419                         len += sprintf(buf + len, "%02x",
 420                                        ifsta->assocreq_ies[i]);
 421                 }
 422         }
 423         if (ifsta->assocresp_ies) {
 424                 if (ifsta->assocreq_ies)
 425                         len += sprintf(buf + len, " ");
 426                 len += sprintf(buf + len, "RespIEs=");
 427                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 428                         len += sprintf(buf + len, "%02x",
 429                                        ifsta->assocresp_ies[i]);
 430                 }
 431         }
 432         len += sprintf(buf + len, ")");
 433
 434         if (len > IW_CUSTOM_MAX) {
 435                 len = sprintf(buf, "ASSOCRESPIE=");
 436                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 437                         len += sprintf(buf + len, "%02x",
 438                                        ifsta->assocresp_ies[i]);
 439                 }
 440         }
 441
 442         memset(&wrqu, 0, sizeof(wrqu));
 443         wrqu.data.length = len;
 444         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 445
 446         kfree(buf);
 447 }
 448
 449
 450 static void ieee80211_set_associated(struct net_device *dev,
 451                                      struct ieee80211_if_sta *ifsta,
 452                                      bool assoc)
 453 {
 454         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 455         union iwreq_data wrqu;
 456
 457         if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
 458                 return;
 459
 460         if (assoc) {
 461                 struct ieee80211_sub_if_data *sdata;
 462                 struct ieee80211_sta_bss *bss;
 463
 464                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 465
 466                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 467                 if (sdata->type != IEEE80211_IF_TYPE_STA)
 468                         return;
 469
 470                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 471                                            local->hw.conf.channel,
 472                                            ifsta->ssid, ifsta->ssid_len);
 473                 if (bss) {
 474                         if (bss->has_erp_value)
 475                                 ieee80211_handle_erp_ie(dev, bss->erp_value);
 476                         ieee80211_rx_bss_put(dev, bss);
 477                 }
 478
 479                 netif_carrier_on(dev);
 480                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 481                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 482                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 483                 ieee80211_sta_send_associnfo(dev, ifsta);
 484         } else {
 485                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 486
 487                 netif_carrier_off(dev);
 488                 ieee80211_reset_erp_info(dev);
 489                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 490         }
 491         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 492         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 493         ifsta->last_probe = jiffies;
 494         ieee80211_led_assoc(local, assoc);
 495 }
 496
 497 static void ieee80211_set_disassoc(struct net_device *dev,
 498                                    struct ieee80211_if_sta *ifsta, int deauth)
 499 {
 500         if (deauth)
 501                 ifsta->auth_tries = 0;
 502         ifsta->assoc_tries = 0;
 503         ieee80211_set_associated(dev, ifsta, 0);
 504 }
 505
 506 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 507                              int encrypt)
 508 {
 509         struct ieee80211_sub_if_data *sdata;
 510         struct ieee80211_tx_packet_data *pkt_data;
 511
 512         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 513         skb->dev = sdata->local->mdev;
 514         skb_set_mac_header(skb, 0);
 515         skb_set_network_header(skb, 0);
 516         skb_set_transport_header(skb, 0);
 517
 518         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 519         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 520         pkt_data->ifindex = sdata->dev->ifindex;
 521         if (!encrypt)
 522                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 523
 524         dev_queue_xmit(skb);
 525 }
 526
 527
 528 static void ieee80211_send_auth(struct net_device *dev,
 529                                 struct ieee80211_if_sta *ifsta,
 530                                 int transaction, u8 *extra, size_t extra_len,
 531                                 int encrypt)
 532 {
 533         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 534         struct sk_buff *skb;
 535         struct ieee80211_mgmt *mgmt;
 536
 537         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 538                             sizeof(*mgmt) + 6 + extra_len);
 539         if (!skb) {
 540                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 541                        "frame\n", dev->name);
 542                 return;
 543         }
 544         skb_reserve(skb, local->hw.extra_tx_headroom);
 545
 546         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 547         memset(mgmt, 0, 24 + 6);
 548         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 549                                            IEEE80211_STYPE_AUTH);
 550         if (encrypt)
 551                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 552         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 553         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 554         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 555         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 556         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 557         ifsta->auth_transaction = transaction + 1;
 558         mgmt->u.auth.status_code = cpu_to_le16(0);
 559         if (extra)
 560                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 561
 562         ieee80211_sta_tx(dev, skb, encrypt);
 563 }
 564
 565
 566 static void ieee80211_authenticate(struct net_device *dev,
 567                                    struct ieee80211_if_sta *ifsta)
 568 {
 569         DECLARE_MAC_BUF(mac);
 570
 571         ifsta->auth_tries++;
 572         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 573                 printk(KERN_DEBUG "%s: authentication with AP %s"
 574                        " timed out\n",
 575                        dev->name, print_mac(mac, ifsta->bssid));
 576                 ifsta->state = IEEE80211_DISABLED;
 577                 return;
 578         }
 579
 580         ifsta->state = IEEE80211_AUTHENTICATE;
 581         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 582                dev->name, print_mac(mac, ifsta->bssid));
 583
 584         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 585
 586         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 587 }
 588
 589
 590 static void ieee80211_send_assoc(struct net_device *dev,
 591                                  struct ieee80211_if_sta *ifsta)
 592 {
 593         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 594         struct ieee80211_hw_mode *mode;
 595         struct sk_buff *skb;
 596         struct ieee80211_mgmt *mgmt;
 597         u8 *pos, *ies;
 598         int i, len;
 599         u16 capab;
 600         struct ieee80211_sta_bss *bss;
 601         int wmm = 0;
 602
 603         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 604                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 605                             ifsta->ssid_len);
 606         if (!skb) {
 607                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 608                        "frame\n", dev->name);
 609                 return;
 610         }
 611         skb_reserve(skb, local->hw.extra_tx_headroom);
 612
 613         mode = local->oper_hw_mode;
 614         capab = ifsta->capab;
 615         if (mode->mode == MODE_IEEE80211G) {
 616                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 617                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 618         }
 619         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 620                                    ifsta->ssid, ifsta->ssid_len);
 621         if (bss) {
 622                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 623                         capab |= WLAN_CAPABILITY_PRIVACY;
 624                 if (bss->wmm_ie) {
 625                         wmm = 1;
 626                 }
 627                 ieee80211_rx_bss_put(dev, bss);
 628         }
 629
 630         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 631         memset(mgmt, 0, 24);
 632         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 633         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 634         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 635
 636         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 637                 skb_put(skb, 10);
 638                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 639                                                    IEEE80211_STYPE_REASSOC_REQ);
 640                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 641                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 642                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 643                        ETH_ALEN);
 644         } else {
 645                 skb_put(skb, 4);
 646                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 647                                                    IEEE80211_STYPE_ASSOC_REQ);
 648                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 649                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 650         }
 651
 652         /* SSID */
 653         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 654         *pos++ = WLAN_EID_SSID;
 655         *pos++ = ifsta->ssid_len;
 656         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 657
 658         len = mode->num_rates;
 659         if (len > 8)
 660                 len = 8;
 661         pos = skb_put(skb, len + 2);
 662         *pos++ = WLAN_EID_SUPP_RATES;
 663         *pos++ = len;
 664         for (i = 0; i < len; i++) {
 665                 int rate = mode->rates[i].rate;
 666                 *pos++ = (u8) (rate / 5);
 667         }
 668
 669         if (mode->num_rates > len) {
 670                 pos = skb_put(skb, mode->num_rates - len + 2);
 671                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 672                 *pos++ = mode->num_rates - len;
 673                 for (i = len; i < mode->num_rates; i++) {
 674                         int rate = mode->rates[i].rate;
 675                         *pos++ = (u8) (rate / 5);
 676                 }
 677         }
 678
 679         if (ifsta->extra_ie) {
 680                 pos = skb_put(skb, ifsta->extra_ie_len);
 681                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 682         }
 683
 684         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 685                 pos = skb_put(skb, 9);
 686                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 687                 *pos++ = 7; /* len */
 688                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 689                 *pos++ = 0x50;
 690                 *pos++ = 0xf2;
 691                 *pos++ = 2; /* WME */
 692                 *pos++ = 0; /* WME info */
 693                 *pos++ = 1; /* WME ver */
 694                 *pos++ = 0;
 695         }
 696         /* wmm support is a must to HT */
 697         if (wmm && mode->ht_info.ht_supported) {
 698                 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
 699                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 700                 *pos++ = WLAN_EID_HT_CAPABILITY;
 701                 *pos++ = sizeof(struct ieee80211_ht_cap);
 702                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 703                 memcpy(pos, &tmp, sizeof(u16));
 704                 pos += sizeof(u16);
 705                 *pos++ = (mode->ht_info.ampdu_factor |
 706                                 (mode->ht_info.ampdu_density << 2));
 707                 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
 708         }
 709
 710         kfree(ifsta->assocreq_ies);
 711         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 712         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 713         if (ifsta->assocreq_ies)
 714                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 715
 716         ieee80211_sta_tx(dev, skb, 0);
 717 }
 718
 719
 720 static void ieee80211_send_deauth(struct net_device *dev,
 721                                   struct ieee80211_if_sta *ifsta, u16 reason)
 722 {
 723         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 724         struct sk_buff *skb;
 725         struct ieee80211_mgmt *mgmt;
 726
 727         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 728         if (!skb) {
 729                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 730                        "frame\n", dev->name);
 731                 return;
 732         }
 733         skb_reserve(skb, local->hw.extra_tx_headroom);
 734
 735         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 736         memset(mgmt, 0, 24);
 737         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 738         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 739         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 740         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 741                                            IEEE80211_STYPE_DEAUTH);
 742         skb_put(skb, 2);
 743         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 744
 745         ieee80211_sta_tx(dev, skb, 0);
 746 }
 747
 748
 749 static void ieee80211_send_disassoc(struct net_device *dev,
 750                                     struct ieee80211_if_sta *ifsta, u16 reason)
 751 {
 752         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 753         struct sk_buff *skb;
 754         struct ieee80211_mgmt *mgmt;
 755
 756         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 757         if (!skb) {
 758                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 759                        "frame\n", dev->name);
 760                 return;
 761         }
 762         skb_reserve(skb, local->hw.extra_tx_headroom);
 763
 764         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 765         memset(mgmt, 0, 24);
 766         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 767         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 768         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 769         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 770                                            IEEE80211_STYPE_DISASSOC);
 771         skb_put(skb, 2);
 772         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 773
 774         ieee80211_sta_tx(dev, skb, 0);
 775 }
 776
 777
 778 static int ieee80211_privacy_mismatch(struct net_device *dev,
 779                                       struct ieee80211_if_sta *ifsta)
 780 {
 781         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 782         struct ieee80211_sta_bss *bss;
 783         int bss_privacy;
 784         int wep_privacy;
 785         int privacy_invoked;
 786
 787         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 788                 return 0;
 789
 790         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 791                                    ifsta->ssid, ifsta->ssid_len);
 792         if (!bss)
 793                 return 0;
 794
 795         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 796         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 797         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 798
 799         ieee80211_rx_bss_put(dev, bss);
 800
 801         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 802                 return 0;
 803
 804         return 1;
 805 }
 806
 807
 808 static void ieee80211_associate(struct net_device *dev,
 809                                 struct ieee80211_if_sta *ifsta)
 810 {
 811         DECLARE_MAC_BUF(mac);
 812
 813         ifsta->assoc_tries++;
 814         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 815                 printk(KERN_DEBUG "%s: association with AP %s"
 816                        " timed out\n",
 817                        dev->name, print_mac(mac, ifsta->bssid));
 818                 ifsta->state = IEEE80211_DISABLED;
 819                 return;
 820         }
 821
 822         ifsta->state = IEEE80211_ASSOCIATE;
 823         printk(KERN_DEBUG "%s: associate with AP %s\n",
 824                dev->name, print_mac(mac, ifsta->bssid));
 825         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 826                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 827                        "mixed-cell disabled - abort association\n", dev->name);
 828                 ifsta->state = IEEE80211_DISABLED;
 829                 return;
 830         }
 831
 832         ieee80211_send_assoc(dev, ifsta);
 833
 834         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 835 }
 836
 837
 838 static void ieee80211_associated(struct net_device *dev,
 839                                  struct ieee80211_if_sta *ifsta)
 840 {
 841         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 842         struct sta_info *sta;
 843         int disassoc;
 844         DECLARE_MAC_BUF(mac);
 845
 846         /* TODO: start monitoring current AP signal quality and number of
 847          * missed beacons. Scan other channels every now and then and search
 848          * for better APs. */
 849         /* TODO: remove expired BSSes */
 850
 851         ifsta->state = IEEE80211_ASSOCIATED;
 852
 853         sta = sta_info_get(local, ifsta->bssid);
 854         if (!sta) {
 855                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 856                        dev->name, print_mac(mac, ifsta->bssid));
 857                 disassoc = 1;
 858         } else {
 859                 disassoc = 0;
 860                 if (time_after(jiffies,
 861                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 862                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 863                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 864                                        "current AP %s - assume out of "
 865                                        "range\n",
 866                                        dev->name, print_mac(mac, ifsta->bssid));
 867                                 disassoc = 1;
 868                                 sta_info_free(sta);
 869                         } else
 870                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 871                                                          local->scan_ssid,
 872                                                          local->scan_ssid_len);
 873                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 874                 } else {
 875                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 876                         if (time_after(jiffies, ifsta->last_probe +
 877                                        IEEE80211_PROBE_INTERVAL)) {
 878                                 ifsta->last_probe = jiffies;
 879                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 880                                                          ifsta->ssid,
 881                                                          ifsta->ssid_len);
 882                         }
 883                 }
 884                 sta_info_put(sta);
 885         }
 886         if (disassoc) {
 887                 ifsta->state = IEEE80211_DISABLED;
 888                 ieee80211_set_associated(dev, ifsta, 0);
 889         } else {
 890                 mod_timer(&ifsta->timer, jiffies +
 891                                       IEEE80211_MONITORING_INTERVAL);
 892         }
 893 }
 894
 895
 896 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 897                                      u8 *ssid, size_t ssid_len)
 898 {
 899         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 900         struct ieee80211_hw_mode *mode;
 901         struct sk_buff *skb;
 902         struct ieee80211_mgmt *mgmt;
 903         u8 *pos, *supp_rates, *esupp_rates = NULL;
 904         int i;
 905
 906         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 907         if (!skb) {
 908                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 909                        "request\n", dev->name);
 910                 return;
 911         }
 912         skb_reserve(skb, local->hw.extra_tx_headroom);
 913
 914         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 915         memset(mgmt, 0, 24);
 916         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 917                                            IEEE80211_STYPE_PROBE_REQ);
 918         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 919         if (dst) {
 920                 memcpy(mgmt->da, dst, ETH_ALEN);
 921                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 922         } else {
 923                 memset(mgmt->da, 0xff, ETH_ALEN);
 924                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 925         }
 926         pos = skb_put(skb, 2 + ssid_len);
 927         *pos++ = WLAN_EID_SSID;
 928         *pos++ = ssid_len;
 929         memcpy(pos, ssid, ssid_len);
 930
 931         supp_rates = skb_put(skb, 2);
 932         supp_rates[0] = WLAN_EID_SUPP_RATES;
 933         supp_rates[1] = 0;
 934         mode = local->oper_hw_mode;
 935         for (i = 0; i < mode->num_rates; i++) {
 936                 struct ieee80211_rate *rate = &mode->rates[i];
 937                 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
 938                         continue;
 939                 if (esupp_rates) {
 940                         pos = skb_put(skb, 1);
 941                         esupp_rates[1]++;
 942                 } else if (supp_rates[1] == 8) {
 943                         esupp_rates = skb_put(skb, 3);
 944                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 945                         esupp_rates[1] = 1;
 946                         pos = &esupp_rates[2];
 947                 } else {
 948                         pos = skb_put(skb, 1);
 949                         supp_rates[1]++;
 950                 }
 951                 *pos = rate->rate / 5;
 952         }
 953
 954         ieee80211_sta_tx(dev, skb, 0);
 955 }
 956
 957
 958 static int ieee80211_sta_wep_configured(struct net_device *dev)
 959 {
 960         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 961         if (!sdata || !sdata->default_key ||
 962             sdata->default_key->conf.alg != ALG_WEP)
 963                 return 0;
 964         return 1;
 965 }
 966
 967
 968 static void ieee80211_auth_completed(struct net_device *dev,
 969                                      struct ieee80211_if_sta *ifsta)
 970 {
 971         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 972         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 973         ieee80211_associate(dev, ifsta);
 974 }
 975
 976
 977 static void ieee80211_auth_challenge(struct net_device *dev,
 978                                      struct ieee80211_if_sta *ifsta,
 979                                      struct ieee80211_mgmt *mgmt,
 980                                      size_t len)
 981 {
 982         u8 *pos;
 983         struct ieee802_11_elems elems;
 984
 985         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 986         pos = mgmt->u.auth.variable;
 987         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 988         if (!elems.challenge) {
 989                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 990                        "frame\n", dev->name);
 991                 return;
 992         }
 993         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 994                             elems.challenge_len + 2, 1);
 995 }
 996
 997 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
 998                                         u8 dialog_token, u16 status, u16 policy,
 999                                         u16 buf_size, u16 timeout)
1000 {
1001         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1002         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1003         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1004         struct sk_buff *skb;
1005         struct ieee80211_mgmt *mgmt;
1006         u16 capab;
1007
1008         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1009         if (!skb) {
1010                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1011                        "for addba resp frame\n", dev->name);
1012                 return;
1013         }
1014
1015         skb_reserve(skb, local->hw.extra_tx_headroom);
1016         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1017         memset(mgmt, 0, 24);
1018         memcpy(mgmt->da, da, ETH_ALEN);
1019         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1020         if (sdata->type == IEEE80211_IF_TYPE_AP)
1021                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1022         else
1023                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1024         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1025                                            IEEE80211_STYPE_ACTION);
1026
1027         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1028         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1029         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1030         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1031
1032         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1033         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1034         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1035
1036         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1037         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1038         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1039
1040         ieee80211_sta_tx(dev, skb, 0);
1041
1042         return;
1043 }
1044
1045 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1046                                                 struct ieee80211_mgmt *mgmt,
1047                                                 size_t len)
1048 {
1049         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1050         struct sta_info *sta;
1051         u16 capab, tid, timeout, ba_policy, buf_size, status;
1052         u8 dialog_token;
1053
1054         sta = sta_info_get(local, mgmt->sa);
1055         if (!sta)
1056                 return;
1057
1058         /* extract session parameters from addba request frame */
1059         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1060         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1061
1062         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1063         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1064         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1065         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1066
1067         /* TODO - currently aggregation is declined (A-MPDU add BA request
1068         * acceptance is not obligatory by 802.11n draft), but here is
1069         * the entry point for dealing with it */
1070 #ifdef MAC80211_HT_DEBUG
1071         if (net_ratelimit())
1072                 printk(KERN_DEBUG "Add Block Ack request arrived,"
1073                                    " currently denying it\n");
1074 #endif /* MAC80211_HT_DEBUG */
1075
1076         status = WLAN_STATUS_REQUEST_DECLINED;
1077
1078         ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1079                                 status, 1, buf_size, timeout);
1080         sta_info_put(sta);
1081 }
1082
1083 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1084                                    struct ieee80211_if_sta *ifsta,
1085                                    struct ieee80211_mgmt *mgmt,
1086                                    size_t len)
1087 {
1088         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1089         u16 auth_alg, auth_transaction, status_code;
1090         DECLARE_MAC_BUF(mac);
1091
1092         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1093             sdata->type != IEEE80211_IF_TYPE_IBSS) {
1094                 printk(KERN_DEBUG "%s: authentication frame received from "
1095                        "%s, but not in authenticate state - ignored\n",
1096                        dev->name, print_mac(mac, mgmt->sa));
1097                 return;
1098         }
1099
1100         if (len < 24 + 6) {
1101                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1102                        "received from %s - ignored\n",
1103                        dev->name, len, print_mac(mac, mgmt->sa));
1104                 return;
1105         }
1106
1107         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1108             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1109                 printk(KERN_DEBUG "%s: authentication frame received from "
1110                        "unknown AP (SA=%s BSSID=%s) - "
1111                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1112                        print_mac(mac, mgmt->bssid));
1113                 return;
1114         }
1115
1116         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1117             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1118                 printk(KERN_DEBUG "%s: authentication frame received from "
1119                        "unknown BSSID (SA=%s BSSID=%s) - "
1120                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1121                        print_mac(mac, mgmt->bssid));
1122                 return;
1123         }
1124
1125         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1126         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1127         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1128
1129         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1130                "transaction=%d status=%d)\n",
1131                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1132                auth_transaction, status_code);
1133
1134         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
1135                 /* IEEE 802.11 standard does not require authentication in IBSS
1136                  * networks and most implementations do not seem to use it.
1137                  * However, try to reply to authentication attempts if someone
1138                  * has actually implemented this.
1139                  * TODO: Could implement shared key authentication. */
1140                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1141                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1142                                "frame (alg=%d transaction=%d)\n",
1143                                dev->name, auth_alg, auth_transaction);
1144                         return;
1145                 }
1146                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1147         }
1148
1149         if (auth_alg != ifsta->auth_alg ||
1150             auth_transaction != ifsta->auth_transaction) {
1151                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1152                        "(alg=%d transaction=%d)\n",
1153                        dev->name, auth_alg, auth_transaction);
1154                 return;
1155         }
1156
1157         if (status_code != WLAN_STATUS_SUCCESS) {
1158                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1159                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1160                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1161                         u8 algs[3];
1162                         const int num_algs = ARRAY_SIZE(algs);
1163                         int i, pos;
1164                         algs[0] = algs[1] = algs[2] = 0xff;
1165                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1166                                 algs[0] = WLAN_AUTH_OPEN;
1167                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1168                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1169                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1170                                 algs[2] = WLAN_AUTH_LEAP;
1171                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1172                                 pos = 0;
1173                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1174                                 pos = 1;
1175                         else
1176                                 pos = 2;
1177                         for (i = 0; i < num_algs; i++) {
1178                                 pos++;
1179                                 if (pos >= num_algs)
1180                                         pos = 0;
1181                                 if (algs[pos] == ifsta->auth_alg ||
1182                                     algs[pos] == 0xff)
1183                                         continue;
1184                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1185                                     !ieee80211_sta_wep_configured(dev))
1186                                         continue;
1187                                 ifsta->auth_alg = algs[pos];
1188                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1189                                        "next try\n",
1190                                        dev->name, ifsta->auth_alg);
1191                                 break;
1192                         }
1193                 }
1194                 return;
1195         }
1196
1197         switch (ifsta->auth_alg) {
1198         case WLAN_AUTH_OPEN:
1199         case WLAN_AUTH_LEAP:
1200                 ieee80211_auth_completed(dev, ifsta);
1201                 break;
1202         case WLAN_AUTH_SHARED_KEY:
1203                 if (ifsta->auth_transaction == 4)
1204                         ieee80211_auth_completed(dev, ifsta);
1205                 else
1206                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1207                 break;
1208         }
1209 }
1210
1211
1212 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1213                                      struct ieee80211_if_sta *ifsta,
1214                                      struct ieee80211_mgmt *mgmt,
1215                                      size_t len)
1216 {
1217         u16 reason_code;
1218         DECLARE_MAC_BUF(mac);
1219
1220         if (len < 24 + 2) {
1221                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1222                        "received from %s - ignored\n",
1223                        dev->name, len, print_mac(mac, mgmt->sa));
1224                 return;
1225         }
1226
1227         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1228                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1229                        "unknown AP (SA=%s BSSID=%s) - "
1230                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1231                        print_mac(mac, mgmt->bssid));
1232                 return;
1233         }
1234
1235         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1236
1237         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1238                " (reason=%d)\n",
1239                dev->name, print_mac(mac, mgmt->sa), reason_code);
1240
1241         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1242                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1243         }
1244
1245         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1246             ifsta->state == IEEE80211_ASSOCIATE ||
1247             ifsta->state == IEEE80211_ASSOCIATED) {
1248                 ifsta->state = IEEE80211_AUTHENTICATE;
1249                 mod_timer(&ifsta->timer, jiffies +
1250                                       IEEE80211_RETRY_AUTH_INTERVAL);
1251         }
1252
1253         ieee80211_set_disassoc(dev, ifsta, 1);
1254         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1255 }
1256
1257
1258 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1259                                        struct ieee80211_if_sta *ifsta,
1260                                        struct ieee80211_mgmt *mgmt,
1261                                        size_t len)
1262 {
1263         u16 reason_code;
1264         DECLARE_MAC_BUF(mac);
1265
1266         if (len < 24 + 2) {
1267                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1268                        "received from %s - ignored\n",
1269                        dev->name, len, print_mac(mac, mgmt->sa));
1270                 return;
1271         }
1272
1273         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1274                 printk(KERN_DEBUG "%s: disassociation frame received from "
1275                        "unknown AP (SA=%s BSSID=%s) - "
1276                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1277                        print_mac(mac, mgmt->bssid));
1278                 return;
1279         }
1280
1281         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1282
1283         printk(KERN_DEBUG "%s: RX disassociation from %s"
1284                " (reason=%d)\n",
1285                dev->name, print_mac(mac, mgmt->sa), reason_code);
1286
1287         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1288                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1289
1290         if (ifsta->state == IEEE80211_ASSOCIATED) {
1291                 ifsta->state = IEEE80211_ASSOCIATE;
1292                 mod_timer(&ifsta->timer, jiffies +
1293                                       IEEE80211_RETRY_AUTH_INTERVAL);
1294         }
1295
1296         ieee80211_set_disassoc(dev, ifsta, 0);
1297 }
1298
1299
1300 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1301                                          struct ieee80211_if_sta *ifsta,
1302                                          struct ieee80211_mgmt *mgmt,
1303                                          size_t len,
1304                                          int reassoc)
1305 {
1306         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1307         struct ieee80211_hw_mode *mode;
1308         struct sta_info *sta;
1309         u32 rates;
1310         u16 capab_info, status_code, aid;
1311         struct ieee802_11_elems elems;
1312         u8 *pos;
1313         int i, j;
1314         DECLARE_MAC_BUF(mac);
1315
1316         /* AssocResp and ReassocResp have identical structure, so process both
1317          * of them in this function. */
1318
1319         if (ifsta->state != IEEE80211_ASSOCIATE) {
1320                 printk(KERN_DEBUG "%s: association frame received from "
1321                        "%s, but not in associate state - ignored\n",
1322                        dev->name, print_mac(mac, mgmt->sa));
1323                 return;
1324         }
1325
1326         if (len < 24 + 6) {
1327                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1328                        "received from %s - ignored\n",
1329                        dev->name, len, print_mac(mac, mgmt->sa));
1330                 return;
1331         }
1332
1333         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1334                 printk(KERN_DEBUG "%s: association frame received from "
1335                        "unknown AP (SA=%s BSSID=%s) - "
1336                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1337                        print_mac(mac, mgmt->bssid));
1338                 return;
1339         }
1340
1341         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1342         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1343         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1344
1345         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1346                "status=%d aid=%d)\n",
1347                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1348                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1349
1350         if (status_code != WLAN_STATUS_SUCCESS) {
1351                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1352                        dev->name, status_code);
1353                 /* if this was a reassociation, ensure we try a "full"
1354                  * association next time. This works around some broken APs
1355                  * which do not correctly reject reassociation requests. */
1356                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1357                 return;
1358         }
1359
1360         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1361                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1362                        "set\n", dev->name, aid);
1363         aid &= ~(BIT(15) | BIT(14));
1364
1365         pos = mgmt->u.assoc_resp.variable;
1366         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1367
1368         if (!elems.supp_rates) {
1369                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1370                        dev->name);
1371                 return;
1372         }
1373
1374         /* it probably doesn't, but if the frame includes an ERP value then
1375          * update our stored copy */
1376         if (elems.erp_info && elems.erp_info_len >= 1) {
1377                 struct ieee80211_sta_bss *bss
1378                         = ieee80211_rx_bss_get(dev, ifsta->bssid,
1379                                                local->hw.conf.channel,
1380                                                ifsta->ssid, ifsta->ssid_len);
1381                 if (bss) {
1382                         bss->erp_value = elems.erp_info[0];
1383                         bss->has_erp_value = 1;
1384                         ieee80211_rx_bss_put(dev, bss);
1385                 }
1386         }
1387
1388         printk(KERN_DEBUG "%s: associated\n", dev->name);
1389         ifsta->aid = aid;
1390         ifsta->ap_capab = capab_info;
1391
1392         kfree(ifsta->assocresp_ies);
1393         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1394         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1395         if (ifsta->assocresp_ies)
1396                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1397
1398         ieee80211_set_associated(dev, ifsta, 1);
1399
1400         /* Add STA entry for the AP */
1401         sta = sta_info_get(local, ifsta->bssid);
1402         if (!sta) {
1403                 struct ieee80211_sta_bss *bss;
1404                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1405                 if (!sta) {
1406                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1407                                " AP\n", dev->name);
1408                         return;
1409                 }
1410                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1411                                            local->hw.conf.channel,
1412                                            ifsta->ssid, ifsta->ssid_len);
1413                 if (bss) {
1414                         sta->last_rssi = bss->rssi;
1415                         sta->last_signal = bss->signal;
1416                         sta->last_noise = bss->noise;
1417                         ieee80211_rx_bss_put(dev, bss);
1418                 }
1419         }
1420
1421         sta->dev = dev;
1422         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1423
1424         rates = 0;
1425         mode = local->oper_hw_mode;
1426         for (i = 0; i < elems.supp_rates_len; i++) {
1427                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1428                 for (j = 0; j < mode->num_rates; j++)
1429                         if (mode->rates[j].rate == rate)
1430                                 rates |= BIT(j);
1431         }
1432         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1433                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1434                 for (j = 0; j < mode->num_rates; j++)
1435                         if (mode->rates[j].rate == rate)
1436                                 rates |= BIT(j);
1437         }
1438         sta->supp_rates = rates;
1439
1440         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1441             local->ops->conf_ht) {
1442                 struct ieee80211_ht_bss_info bss_info;
1443
1444                 ieee80211_ht_cap_ie_to_ht_info(
1445                                 (struct ieee80211_ht_cap *)
1446                                 elems.ht_cap_elem, &sta->ht_info);
1447                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1448                                 (struct ieee80211_ht_addt_info *)
1449                                 elems.ht_info_elem, &bss_info);
1450                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1451         }
1452
1453         rate_control_rate_init(sta, local);
1454
1455         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1456                 sta->flags |= WLAN_STA_WME;
1457                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1458                                          elems.wmm_param_len);
1459         }
1460
1461
1462         sta_info_put(sta);
1463
1464         ieee80211_associated(dev, ifsta);
1465 }
1466
1467
1468 /* Caller must hold local->sta_bss_lock */
1469 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1470                                         struct ieee80211_sta_bss *bss)
1471 {
1472         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1473         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1474         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1475 }
1476
1477
1478 /* Caller must hold local->sta_bss_lock */
1479 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1480                                         struct ieee80211_sta_bss *bss)
1481 {
1482         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1483         struct ieee80211_sta_bss *b, *prev = NULL;
1484         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1485         while (b) {
1486                 if (b == bss) {
1487                         if (!prev)
1488                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1489                                         bss->hnext;
1490                         else
1491                                 prev->hnext = bss->hnext;
1492                         break;
1493                 }
1494                 prev = b;
1495                 b = b->hnext;
1496         }
1497 }
1498
1499
1500 static struct ieee80211_sta_bss *
1501 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1502                      u8 *ssid, u8 ssid_len)
1503 {
1504         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1505         struct ieee80211_sta_bss *bss;
1506
1507         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1508         if (!bss)
1509                 return NULL;
1510         atomic_inc(&bss->users);
1511         atomic_inc(&bss->users);
1512         memcpy(bss->bssid, bssid, ETH_ALEN);
1513         bss->channel = channel;
1514         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1515                 memcpy(bss->ssid, ssid, ssid_len);
1516                 bss->ssid_len = ssid_len;
1517         }
1518
1519         spin_lock_bh(&local->sta_bss_lock);
1520         /* TODO: order by RSSI? */
1521         list_add_tail(&bss->list, &local->sta_bss_list);
1522         __ieee80211_rx_bss_hash_add(dev, bss);
1523         spin_unlock_bh(&local->sta_bss_lock);
1524         return bss;
1525 }
1526
1527
1528 static struct ieee80211_sta_bss *
1529 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1530                      u8 *ssid, u8 ssid_len)
1531 {
1532         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1533         struct ieee80211_sta_bss *bss;
1534
1535         spin_lock_bh(&local->sta_bss_lock);
1536         bss = local->sta_bss_hash[STA_HASH(bssid)];
1537         while (bss) {
1538                 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1539                     bss->channel == channel &&
1540                     bss->ssid_len == ssid_len &&
1541                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1542                         atomic_inc(&bss->users);
1543                         break;
1544                 }
1545                 bss = bss->hnext;
1546         }
1547         spin_unlock_bh(&local->sta_bss_lock);
1548         return bss;
1549 }
1550
1551
1552 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1553 {
1554         kfree(bss->wpa_ie);
1555         kfree(bss->rsn_ie);
1556         kfree(bss->wmm_ie);
1557         kfree(bss->ht_ie);
1558         kfree(bss);
1559 }
1560
1561
1562 static void ieee80211_rx_bss_put(struct net_device *dev,
1563                                  struct ieee80211_sta_bss *bss)
1564 {
1565         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1566         if (!atomic_dec_and_test(&bss->users))
1567                 return;
1568
1569         spin_lock_bh(&local->sta_bss_lock);
1570         __ieee80211_rx_bss_hash_del(dev, bss);
1571         list_del(&bss->list);
1572         spin_unlock_bh(&local->sta_bss_lock);
1573         ieee80211_rx_bss_free(bss);
1574 }
1575
1576
1577 void ieee80211_rx_bss_list_init(struct net_device *dev)
1578 {
1579         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1580         spin_lock_init(&local->sta_bss_lock);
1581         INIT_LIST_HEAD(&local->sta_bss_list);
1582 }
1583
1584
1585 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1586 {
1587         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1588         struct ieee80211_sta_bss *bss, *tmp;
1589
1590         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1591                 ieee80211_rx_bss_put(dev, bss);
1592 }
1593
1594
1595 static void ieee80211_rx_bss_info(struct net_device *dev,
1596                                   struct ieee80211_mgmt *mgmt,
1597                                   size_t len,
1598                                   struct ieee80211_rx_status *rx_status,
1599                                   int beacon)
1600 {
1601         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1602         struct ieee802_11_elems elems;
1603         size_t baselen;
1604         int channel, clen;
1605         struct ieee80211_sta_bss *bss;
1606         struct sta_info *sta;
1607         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1608         u64 timestamp;
1609         DECLARE_MAC_BUF(mac);
1610         DECLARE_MAC_BUF(mac2);
1611
1612         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1613                 return; /* ignore ProbeResp to foreign address */
1614
1615 #if 0
1616         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
1617                dev->name, beacon ? "Beacon" : "Probe Response",
1618                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
1619 #endif
1620
1621         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1622         if (baselen > len)
1623                 return;
1624
1625         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1626
1627         if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1628             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1629 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1630                 static unsigned long last_tsf_debug = 0;
1631                 u64 tsf;
1632                 if (local->ops->get_tsf)
1633                         tsf = local->ops->get_tsf(local_to_hw(local));
1634                 else
1635                         tsf = -1LLU;
1636                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1637                         printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1638                                "%s TSF=0x%llx BCN=0x%llx diff=%lld "
1639                                "@%lu\n",
1640                                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
1641                                (unsigned long long)tsf,
1642                                (unsigned long long)timestamp,
1643                                (unsigned long long)(tsf - timestamp),
1644                                jiffies);
1645                         last_tsf_debug = jiffies;
1646                 }
1647 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1648         }
1649
1650         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1651
1652         if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1653             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1654             (sta = sta_info_get(local, mgmt->sa))) {
1655                 struct ieee80211_hw_mode *mode;
1656                 struct ieee80211_rate *rates;
1657                 size_t num_rates;
1658                 u32 supp_rates, prev_rates;
1659                 int i, j;
1660
1661                 mode = local->sta_sw_scanning ?
1662                        local->scan_hw_mode : local->oper_hw_mode;
1663
1664                 if (local->sta_hw_scanning) {
1665                         /* search for the correct mode matches the beacon */
1666                         list_for_each_entry(mode, &local->modes_list, list)
1667                                 if (mode->mode == rx_status->phymode)
1668                                         break;
1669
1670                         if (mode == NULL)
1671                                 mode = local->oper_hw_mode;
1672                 }
1673                 rates = mode->rates;
1674                 num_rates = mode->num_rates;
1675
1676                 supp_rates = 0;
1677                 for (i = 0; i < elems.supp_rates_len +
1678                              elems.ext_supp_rates_len; i++) {
1679                         u8 rate = 0;
1680                         int own_rate;
1681                         if (i < elems.supp_rates_len)
1682                                 rate = elems.supp_rates[i];
1683                         else if (elems.ext_supp_rates)
1684                                 rate = elems.ext_supp_rates
1685                                         [i - elems.supp_rates_len];
1686                         own_rate = 5 * (rate & 0x7f);
1687                         for (j = 0; j < num_rates; j++)
1688                                 if (rates[j].rate == own_rate)
1689                                         supp_rates |= BIT(j);
1690                 }
1691
1692                 prev_rates = sta->supp_rates;
1693                 sta->supp_rates &= supp_rates;
1694                 if (sta->supp_rates == 0) {
1695                         /* No matching rates - this should not really happen.
1696                          * Make sure that at least one rate is marked
1697                          * supported to avoid issues with TX rate ctrl. */
1698                         sta->supp_rates = sdata->u.sta.supp_rates_bits;
1699                 }
1700                 if (sta->supp_rates != prev_rates) {
1701                         printk(KERN_DEBUG "%s: updated supp_rates set for "
1702                                "%s based on beacon info (0x%x & 0x%x -> "
1703                                "0x%x)\n",
1704                                dev->name, print_mac(mac, sta->addr), prev_rates,
1705                                supp_rates, sta->supp_rates);
1706                 }
1707                 sta_info_put(sta);
1708         }
1709
1710         if (!elems.ssid)
1711                 return;
1712
1713         if (elems.ds_params && elems.ds_params_len == 1)
1714                 channel = elems.ds_params[0];
1715         else
1716                 channel = rx_status->channel;
1717
1718         bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1719                                    elems.ssid, elems.ssid_len);
1720         if (!bss) {
1721                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1722                                            elems.ssid, elems.ssid_len);
1723                 if (!bss)
1724                         return;
1725         } else {
1726 #if 0
1727                 /* TODO: order by RSSI? */
1728                 spin_lock_bh(&local->sta_bss_lock);
1729                 list_move_tail(&bss->list, &local->sta_bss_list);
1730                 spin_unlock_bh(&local->sta_bss_lock);
1731 #endif
1732         }
1733
1734         if (bss->probe_resp && beacon) {
1735                 /* Do not allow beacon to override data from Probe Response. */
1736                 ieee80211_rx_bss_put(dev, bss);
1737                 return;
1738         }
1739
1740         /* save the ERP value so that it is available at association time */
1741         if (elems.erp_info && elems.erp_info_len >= 1) {
1742                 bss->erp_value = elems.erp_info[0];
1743                 bss->has_erp_value = 1;
1744         }
1745
1746         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1747         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1748
1749         bss->supp_rates_len = 0;
1750         if (elems.supp_rates) {
1751                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1752                 if (clen > elems.supp_rates_len)
1753                         clen = elems.supp_rates_len;
1754                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1755                        clen);
1756                 bss->supp_rates_len += clen;
1757         }
1758         if (elems.ext_supp_rates) {
1759                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1760                 if (clen > elems.ext_supp_rates_len)
1761                         clen = elems.ext_supp_rates_len;
1762                 memcpy(&bss->supp_rates[bss->supp_rates_len],
1763                        elems.ext_supp_rates, clen);
1764                 bss->supp_rates_len += clen;
1765         }
1766
1767         if (elems.wpa &&
1768             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1769              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1770                 kfree(bss->wpa_ie);
1771                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1772                 if (bss->wpa_ie) {
1773                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1774                         bss->wpa_ie_len = elems.wpa_len + 2;
1775                 } else
1776                         bss->wpa_ie_len = 0;
1777         } else if (!elems.wpa && bss->wpa_ie) {
1778                 kfree(bss->wpa_ie);
1779                 bss->wpa_ie = NULL;
1780                 bss->wpa_ie_len = 0;
1781         }
1782
1783         if (elems.rsn &&
1784             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1785              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1786                 kfree(bss->rsn_ie);
1787                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1788                 if (bss->rsn_ie) {
1789                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1790                         bss->rsn_ie_len = elems.rsn_len + 2;
1791                 } else
1792                         bss->rsn_ie_len = 0;
1793         } else if (!elems.rsn && bss->rsn_ie) {
1794                 kfree(bss->rsn_ie);
1795                 bss->rsn_ie = NULL;
1796                 bss->rsn_ie_len = 0;
1797         }
1798
1799         if (elems.wmm_param &&
1800             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1801              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1802                 kfree(bss->wmm_ie);
1803                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1804                 if (bss->wmm_ie) {
1805                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
1806                                elems.wmm_param_len + 2);
1807                         bss->wmm_ie_len = elems.wmm_param_len + 2;
1808                 } else
1809                         bss->wmm_ie_len = 0;
1810         } else if (!elems.wmm_param && bss->wmm_ie) {
1811                 kfree(bss->wmm_ie);
1812                 bss->wmm_ie = NULL;
1813                 bss->wmm_ie_len = 0;
1814         }
1815         if (elems.ht_cap_elem &&
1816             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
1817              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
1818                 kfree(bss->ht_ie);
1819                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
1820                 if (bss->ht_ie) {
1821                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
1822                                elems.ht_cap_elem_len + 2);
1823                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
1824                 } else
1825                         bss->ht_ie_len = 0;
1826         } else if (!elems.ht_cap_elem && bss->ht_ie) {
1827                 kfree(bss->ht_ie);
1828                 bss->ht_ie = NULL;
1829                 bss->ht_ie_len = 0;
1830         }
1831
1832         bss->hw_mode = rx_status->phymode;
1833         bss->freq = rx_status->freq;
1834         if (channel != rx_status->channel &&
1835             (bss->hw_mode == MODE_IEEE80211G ||
1836              bss->hw_mode == MODE_IEEE80211B) &&
1837             channel >= 1 && channel <= 14) {
1838                 static const int freq_list[] = {
1839                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
1840                         2447, 2452, 2457, 2462, 2467, 2472, 2484
1841                 };
1842                 /* IEEE 802.11g/b mode can receive packets from neighboring
1843                  * channels, so map the channel into frequency. */
1844                 bss->freq = freq_list[channel - 1];
1845         }
1846         bss->timestamp = timestamp;
1847         bss->last_update = jiffies;
1848         bss->rssi = rx_status->ssi;
1849         bss->signal = rx_status->signal;
1850         bss->noise = rx_status->noise;
1851         if (!beacon)
1852                 bss->probe_resp++;
1853         ieee80211_rx_bss_put(dev, bss);
1854 }
1855
1856
1857 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1858                                          struct ieee80211_mgmt *mgmt,
1859                                          size_t len,
1860                                          struct ieee80211_rx_status *rx_status)
1861 {
1862         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1863 }
1864
1865
1866 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1867                                      struct ieee80211_mgmt *mgmt,
1868                                      size_t len,
1869                                      struct ieee80211_rx_status *rx_status)
1870 {
1871         struct ieee80211_sub_if_data *sdata;
1872         struct ieee80211_if_sta *ifsta;
1873         size_t baselen;
1874         struct ieee802_11_elems elems;
1875         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1876         struct ieee80211_conf *conf = &local->hw.conf;
1877
1878         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1879
1880         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1881         if (sdata->type != IEEE80211_IF_TYPE_STA)
1882                 return;
1883         ifsta = &sdata->u.sta;
1884
1885         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1886             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1887                 return;
1888
1889         /* Process beacon from the current BSS */
1890         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1891         if (baselen > len)
1892                 return;
1893
1894         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1895
1896         if (elems.erp_info && elems.erp_info_len >= 1)
1897                 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1898
1899         if (elems.ht_cap_elem && elems.ht_info_elem &&
1900             elems.wmm_param && local->ops->conf_ht &&
1901             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
1902                 struct ieee80211_ht_bss_info bss_info;
1903
1904                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1905                                 (struct ieee80211_ht_addt_info *)
1906                                 elems.ht_info_elem, &bss_info);
1907                 /* check if AP changed bss inforamation */
1908                 if ((conf->ht_bss_conf.primary_channel !=
1909                      bss_info.primary_channel) ||
1910                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
1911                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
1912                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
1913                                                 &bss_info);
1914         }
1915
1916         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1917                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1918                                          elems.wmm_param_len);
1919         }
1920 }
1921
1922
1923 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1924                                         struct ieee80211_if_sta *ifsta,
1925                                         struct ieee80211_mgmt *mgmt,
1926                                         size_t len,
1927                                         struct ieee80211_rx_status *rx_status)
1928 {
1929         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1930         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1931         int tx_last_beacon;
1932         struct sk_buff *skb;
1933         struct ieee80211_mgmt *resp;
1934         u8 *pos, *end;
1935         DECLARE_MAC_BUF(mac);
1936 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1937         DECLARE_MAC_BUF(mac2);
1938         DECLARE_MAC_BUF(mac3);
1939 #endif
1940
1941         if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1942             ifsta->state != IEEE80211_IBSS_JOINED ||
1943             len < 24 + 2 || !ifsta->probe_resp)
1944                 return;
1945
1946         if (local->ops->tx_last_beacon)
1947                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1948         else
1949                 tx_last_beacon = 1;
1950
1951 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1952         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1953                "%s (tx_last_beacon=%d)\n",
1954                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1955                print_mac(mac3, mgmt->bssid), tx_last_beacon);
1956 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1957
1958         if (!tx_last_beacon)
1959                 return;
1960
1961         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1962             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1963                 return;
1964
1965         end = ((u8 *) mgmt) + len;
1966         pos = mgmt->u.probe_req.variable;
1967         if (pos[0] != WLAN_EID_SSID ||
1968             pos + 2 + pos[1] > end) {
1969                 if (net_ratelimit()) {
1970                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1971                                "from %s\n",
1972                                dev->name, print_mac(mac, mgmt->sa));
1973                 }
1974                 return;
1975         }
1976         if (pos[1] != 0 &&
1977             (pos[1] != ifsta->ssid_len ||
1978              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1979                 /* Ignore ProbeReq for foreign SSID */
1980                 return;
1981         }
1982
1983         /* Reply with ProbeResp */
1984         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1985         if (!skb)
1986                 return;
1987
1988         resp = (struct ieee80211_mgmt *) skb->data;
1989         memcpy(resp->da, mgmt->sa, ETH_ALEN);
1990 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1991         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1992                dev->name, print_mac(mac, resp->da));
1993 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1994         ieee80211_sta_tx(dev, skb, 0);
1995 }
1996
1997 void ieee80211_rx_mgmt_action(struct net_device *dev,
1998                              struct ieee80211_if_sta *ifsta,
1999                              struct ieee80211_mgmt *mgmt,
2000                              size_t len)
2001 {
2002         if (len < IEEE80211_MIN_ACTION_SIZE)
2003                 return;
2004
2005         switch (mgmt->u.action.category) {
2006         case WLAN_CATEGORY_BACK:
2007                 switch (mgmt->u.action.u.addba_req.action_code) {
2008                 case WLAN_ACTION_ADDBA_REQ:
2009                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2010                                    sizeof(mgmt->u.action.u.addba_req)))
2011                                 break;
2012                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2013                         break;
2014                 default:
2015                         if (net_ratelimit())
2016                            printk(KERN_DEBUG "%s: received unsupported BACK\n",
2017                                         dev->name);
2018                         break;
2019                 }
2020                 break;
2021         default:
2022                 break;
2023         }
2024 }
2025
2026 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2027                            struct ieee80211_rx_status *rx_status)
2028 {
2029         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2030         struct ieee80211_sub_if_data *sdata;
2031         struct ieee80211_if_sta *ifsta;
2032         struct ieee80211_mgmt *mgmt;
2033         u16 fc;
2034
2035         if (skb->len < 24)
2036                 goto fail;
2037
2038         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2039         ifsta = &sdata->u.sta;
2040
2041         mgmt = (struct ieee80211_mgmt *) skb->data;
2042         fc = le16_to_cpu(mgmt->frame_control);
2043
2044         switch (fc & IEEE80211_FCTL_STYPE) {
2045         case IEEE80211_STYPE_PROBE_REQ:
2046         case IEEE80211_STYPE_PROBE_RESP:
2047         case IEEE80211_STYPE_BEACON:
2048                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2049         case IEEE80211_STYPE_AUTH:
2050         case IEEE80211_STYPE_ASSOC_RESP:
2051         case IEEE80211_STYPE_REASSOC_RESP:
2052         case IEEE80211_STYPE_DEAUTH:
2053         case IEEE80211_STYPE_DISASSOC:
2054         case IEEE80211_STYPE_ACTION:
2055                 skb_queue_tail(&ifsta->skb_queue, skb);
2056                 queue_work(local->hw.workqueue, &ifsta->work);
2057                 return;
2058         default:
2059                 printk(KERN_DEBUG "%s: received unknown management frame - "
2060                        "stype=%d\n", dev->name,
2061                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2062                 break;
2063         }
2064
2065  fail:
2066         kfree_skb(skb);
2067 }
2068
2069
2070 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2071                                          struct sk_buff *skb)
2072 {
2073         struct ieee80211_rx_status *rx_status;
2074         struct ieee80211_sub_if_data *sdata;
2075         struct ieee80211_if_sta *ifsta;
2076         struct ieee80211_mgmt *mgmt;
2077         u16 fc;
2078
2079         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2080         ifsta = &sdata->u.sta;
2081
2082         rx_status = (struct ieee80211_rx_status *) skb->cb;
2083         mgmt = (struct ieee80211_mgmt *) skb->data;
2084         fc = le16_to_cpu(mgmt->frame_control);
2085
2086         switch (fc & IEEE80211_FCTL_STYPE) {
2087         case IEEE80211_STYPE_PROBE_REQ:
2088                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2089                                             rx_status);
2090                 break;
2091         case IEEE80211_STYPE_PROBE_RESP:
2092                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2093                 break;
2094         case IEEE80211_STYPE_BEACON:
2095                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2096                 break;
2097         case IEEE80211_STYPE_AUTH:
2098                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2099                 break;
2100         case IEEE80211_STYPE_ASSOC_RESP:
2101                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
2102                 break;
2103         case IEEE80211_STYPE_REASSOC_RESP:
2104                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
2105                 break;
2106         case IEEE80211_STYPE_DEAUTH:
2107                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2108                 break;
2109         case IEEE80211_STYPE_DISASSOC:
2110                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2111                 break;
2112         case IEEE80211_STYPE_ACTION:
2113                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2114                 break;
2115         }
2116
2117         kfree_skb(skb);
2118 }
2119
2120
2121 ieee80211_txrx_result
2122 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2123                       struct ieee80211_rx_status *rx_status)
2124 {
2125         struct ieee80211_mgmt *mgmt;
2126         u16 fc;
2127
2128         if (skb->len < 2)
2129                 return TXRX_DROP;
2130
2131         mgmt = (struct ieee80211_mgmt *) skb->data;
2132         fc = le16_to_cpu(mgmt->frame_control);
2133
2134         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2135                 return TXRX_CONTINUE;
2136
2137         if (skb->len < 24)
2138                 return TXRX_DROP;
2139
2140         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2141                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2142                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2143                                                      skb->len, rx_status);
2144                         dev_kfree_skb(skb);
2145                         return TXRX_QUEUED;
2146                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2147                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2148                                                  rx_status);
2149                         dev_kfree_skb(skb);
2150                         return TXRX_QUEUED;
2151                 }
2152         }
2153         return TXRX_CONTINUE;
2154 }
2155
2156
2157 static int ieee80211_sta_active_ibss(struct net_device *dev)
2158 {
2159         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2160         int active = 0;
2161         struct sta_info *sta;
2162
2163         read_lock_bh(&local->sta_lock);
2164         list_for_each_entry(sta, &local->sta_list, list) {
2165                 if (sta->dev == dev &&
2166                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2167                                jiffies)) {
2168                         active++;
2169                         break;
2170                 }
2171         }
2172         read_unlock_bh(&local->sta_lock);
2173
2174         return active;
2175 }
2176
2177
2178 static void ieee80211_sta_expire(struct net_device *dev)
2179 {
2180         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2181         struct sta_info *sta, *tmp;
2182         LIST_HEAD(tmp_list);
2183         DECLARE_MAC_BUF(mac);
2184
2185         write_lock_bh(&local->sta_lock);
2186         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2187                 if (time_after(jiffies, sta->last_rx +
2188                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2189                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2190                                dev->name, print_mac(mac, sta->addr));
2191                         __sta_info_get(sta);
2192                         sta_info_remove(sta);
2193                         list_add(&sta->list, &tmp_list);
2194                 }
2195         write_unlock_bh(&local->sta_lock);
2196
2197         list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2198                 sta_info_free(sta);
2199                 sta_info_put(sta);
2200         }
2201 }
2202
2203
2204 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2205                                      struct ieee80211_if_sta *ifsta)
2206 {
2207         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2208
2209         ieee80211_sta_expire(dev);
2210         if (ieee80211_sta_active_ibss(dev))
2211                 return;
2212
2213         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2214                "IBSS networks with same SSID (merge)\n", dev->name);
2215         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2216 }
2217
2218
2219 void ieee80211_sta_timer(unsigned long data)
2220 {
2221         struct ieee80211_sub_if_data *sdata =
2222                 (struct ieee80211_sub_if_data *) data;
2223         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2224         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2225
2226         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2227         queue_work(local->hw.workqueue, &ifsta->work);
2228 }
2229
2230
2231 void ieee80211_sta_work(struct work_struct *work)
2232 {
2233         struct ieee80211_sub_if_data *sdata =
2234                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2235         struct net_device *dev = sdata->dev;
2236         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2237         struct ieee80211_if_sta *ifsta;
2238         struct sk_buff *skb;
2239
2240         if (!netif_running(dev))
2241                 return;
2242
2243         if (local->sta_sw_scanning || local->sta_hw_scanning)
2244                 return;
2245
2246         if (sdata->type != IEEE80211_IF_TYPE_STA &&
2247             sdata->type != IEEE80211_IF_TYPE_IBSS) {
2248                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2249                        "(type=%d)\n", dev->name, sdata->type);
2250                 return;
2251         }
2252         ifsta = &sdata->u.sta;
2253
2254         while ((skb = skb_dequeue(&ifsta->skb_queue)))
2255                 ieee80211_sta_rx_queued_mgmt(dev, skb);
2256
2257         if (ifsta->state != IEEE80211_AUTHENTICATE &&
2258             ifsta->state != IEEE80211_ASSOCIATE &&
2259             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2260                 if (ifsta->scan_ssid_len)
2261                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2262                 else
2263                         ieee80211_sta_start_scan(dev, NULL, 0);
2264                 return;
2265         }
2266
2267         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2268                 if (ieee80211_sta_config_auth(dev, ifsta))
2269                         return;
2270                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2271         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2272                 return;
2273
2274         switch (ifsta->state) {
2275         case IEEE80211_DISABLED:
2276                 break;
2277         case IEEE80211_AUTHENTICATE:
2278                 ieee80211_authenticate(dev, ifsta);
2279                 break;
2280         case IEEE80211_ASSOCIATE:
2281                 ieee80211_associate(dev, ifsta);
2282                 break;
2283         case IEEE80211_ASSOCIATED:
2284                 ieee80211_associated(dev, ifsta);
2285                 break;
2286         case IEEE80211_IBSS_SEARCH:
2287                 ieee80211_sta_find_ibss(dev, ifsta);
2288                 break;
2289         case IEEE80211_IBSS_JOINED:
2290                 ieee80211_sta_merge_ibss(dev, ifsta);
2291                 break;
2292         default:
2293                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2294                        ifsta->state);
2295                 break;
2296         }
2297
2298         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2299                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2300                        "mixed-cell disabled - disassociate\n", dev->name);
2301
2302                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2303                 ieee80211_set_disassoc(dev, ifsta, 0);
2304         }
2305 }
2306
2307
2308 static void ieee80211_sta_reset_auth(struct net_device *dev,
2309                                      struct ieee80211_if_sta *ifsta)
2310 {
2311         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2312
2313         if (local->ops->reset_tsf) {
2314                 /* Reset own TSF to allow time synchronization work. */
2315                 local->ops->reset_tsf(local_to_hw(local));
2316         }
2317
2318         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2319
2320
2321         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2322                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2323         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2324                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2325         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2326                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2327         else
2328                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2329         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2330                ifsta->auth_alg);
2331         ifsta->auth_transaction = -1;
2332         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2333         ifsta->auth_tries = ifsta->assoc_tries = 0;
2334         netif_carrier_off(dev);
2335 }
2336
2337
2338 void ieee80211_sta_req_auth(struct net_device *dev,
2339                             struct ieee80211_if_sta *ifsta)
2340 {
2341         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2342         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2343
2344         if (sdata->type != IEEE80211_IF_TYPE_STA)
2345                 return;
2346
2347         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2348                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2349             (ifsta->flags & (IEEE80211_STA_SSID_SET |
2350                                 IEEE80211_STA_AUTO_SSID_SEL))) {
2351                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2352                 queue_work(local->hw.workqueue, &ifsta->work);
2353         }
2354 }
2355
2356 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2357                                     const char *ssid, int ssid_len)
2358 {
2359         int tmp, hidden_ssid;
2360
2361         if (ssid_len == ifsta->ssid_len &&
2362             !memcmp(ifsta->ssid, ssid, ssid_len))
2363                 return 1;
2364
2365         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2366                 return 0;
2367
2368         hidden_ssid = 1;
2369         tmp = ssid_len;
2370         while (tmp--) {
2371                 if (ssid[tmp] != '\0') {
2372                         hidden_ssid = 0;
2373                         break;
2374                 }
2375         }
2376
2377         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2378                 return 1;
2379
2380         if (ssid_len == 1 && ssid[0] == ' ')
2381                 return 1;
2382
2383         return 0;
2384 }
2385
2386 static int ieee80211_sta_config_auth(struct net_device *dev,
2387                                      struct ieee80211_if_sta *ifsta)
2388 {
2389         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2390         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2391         struct ieee80211_sta_bss *bss, *selected = NULL;
2392         int top_rssi = 0, freq;
2393
2394         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2395             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2396                 ifsta->state = IEEE80211_AUTHENTICATE;
2397                 ieee80211_sta_reset_auth(dev, ifsta);
2398                 return 0;
2399         }
2400
2401         spin_lock_bh(&local->sta_bss_lock);
2402         freq = local->oper_channel->freq;
2403         list_for_each_entry(bss, &local->sta_bss_list, list) {
2404                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2405                         continue;
2406
2407                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2408                     !!sdata->default_key)
2409                         continue;
2410
2411                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2412                     bss->freq != freq)
2413                         continue;
2414
2415                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2416                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2417                         continue;
2418
2419                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2420                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2421                         continue;
2422
2423                 if (!selected || top_rssi < bss->rssi) {
2424                         selected = bss;
2425                         top_rssi = bss->rssi;
2426                 }
2427         }
2428         if (selected)
2429                 atomic_inc(&selected->users);
2430         spin_unlock_bh(&local->sta_bss_lock);
2431
2432         if (selected) {
2433                 ieee80211_set_channel(local, -1, selected->freq);
2434                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2435                         ieee80211_sta_set_ssid(dev, selected->ssid,
2436                                                selected->ssid_len);
2437                 ieee80211_sta_set_bssid(dev, selected->bssid);
2438                 ieee80211_rx_bss_put(dev, selected);
2439                 ifsta->state = IEEE80211_AUTHENTICATE;
2440                 ieee80211_sta_reset_auth(dev, ifsta);
2441                 return 0;
2442         } else {
2443                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2444                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2445                                 ieee80211_sta_start_scan(dev, NULL, 0);
2446                         else
2447                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2448                                                          ifsta->ssid_len);
2449                         ifsta->state = IEEE80211_AUTHENTICATE;
2450                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2451                 } else
2452                         ifsta->state = IEEE80211_DISABLED;
2453         }
2454         return -1;
2455 }
2456
2457 static int ieee80211_sta_join_ibss(struct net_device *dev,
2458                                    struct ieee80211_if_sta *ifsta,
2459                                    struct ieee80211_sta_bss *bss)
2460 {
2461         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2462         int res, rates, i, j;
2463         struct sk_buff *skb;
2464         struct ieee80211_mgmt *mgmt;
2465         struct ieee80211_tx_control control;
2466         struct ieee80211_rate *rate;
2467         struct ieee80211_hw_mode *mode;
2468         struct rate_control_extra extra;
2469         u8 *pos;
2470         struct ieee80211_sub_if_data *sdata;
2471
2472         /* Remove possible STA entries from other IBSS networks. */
2473         sta_info_flush(local, NULL);
2474
2475         if (local->ops->reset_tsf) {
2476                 /* Reset own TSF to allow time synchronization work. */
2477                 local->ops->reset_tsf(local_to_hw(local));
2478         }
2479         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2480         res = ieee80211_if_config(dev);
2481         if (res)
2482                 return res;
2483
2484         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2485
2486         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2487         sdata->drop_unencrypted = bss->capability &
2488                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2489
2490         res = ieee80211_set_channel(local, -1, bss->freq);
2491
2492         if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2493                 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2494                        "(%d MHz)\n", dev->name, local->hw.conf.channel,
2495                        local->hw.conf.freq);
2496                 return -1;
2497         }
2498
2499         /* Set beacon template based on scan results */
2500         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2501         do {
2502                 if (!skb)
2503                         break;
2504
2505                 skb_reserve(skb, local->hw.extra_tx_headroom);
2506
2507                 mgmt = (struct ieee80211_mgmt *)
2508                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2509                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2510                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2511                                                    IEEE80211_STYPE_BEACON);
2512                 memset(mgmt->da, 0xff, ETH_ALEN);
2513                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2514                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2515                 mgmt->u.beacon.beacon_int =
2516                         cpu_to_le16(local->hw.conf.beacon_int);
2517                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2518
2519                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2520                 *pos++ = WLAN_EID_SSID;
2521                 *pos++ = ifsta->ssid_len;
2522                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2523
2524                 rates = bss->supp_rates_len;
2525                 if (rates > 8)
2526                         rates = 8;
2527                 pos = skb_put(skb, 2 + rates);
2528                 *pos++ = WLAN_EID_SUPP_RATES;
2529                 *pos++ = rates;
2530                 memcpy(pos, bss->supp_rates, rates);
2531
2532                 pos = skb_put(skb, 2 + 1);
2533                 *pos++ = WLAN_EID_DS_PARAMS;
2534                 *pos++ = 1;
2535                 *pos++ = bss->channel;
2536
2537                 pos = skb_put(skb, 2 + 2);
2538                 *pos++ = WLAN_EID_IBSS_PARAMS;
2539                 *pos++ = 2;
2540                 /* FIX: set ATIM window based on scan results */
2541                 *pos++ = 0;
2542                 *pos++ = 0;
2543
2544                 if (bss->supp_rates_len > 8) {
2545                         rates = bss->supp_rates_len - 8;
2546                         pos = skb_put(skb, 2 + rates);
2547                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2548                         *pos++ = rates;
2549                         memcpy(pos, &bss->supp_rates[8], rates);
2550                 }
2551
2552                 memset(&control, 0, sizeof(control));
2553                 memset(&extra, 0, sizeof(extra));
2554                 extra.mode = local->oper_hw_mode;
2555                 rate = rate_control_get_rate(local, dev, skb, &extra);
2556                 if (!rate) {
2557                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2558                                "for IBSS beacon\n", dev->name);
2559                         break;
2560                 }
2561                 control.tx_rate =
2562                         ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
2563                         (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2564                         rate->val2 : rate->val;
2565                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2566                 control.power_level = local->hw.conf.power_level;
2567                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2568                 control.retry_limit = 1;
2569
2570                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2571                 if (ifsta->probe_resp) {
2572                         mgmt = (struct ieee80211_mgmt *)
2573                                 ifsta->probe_resp->data;
2574                         mgmt->frame_control =
2575                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2576                                              IEEE80211_STYPE_PROBE_RESP);
2577                 } else {
2578                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2579                                "template for IBSS\n", dev->name);
2580                 }
2581
2582                 if (local->ops->beacon_update &&
2583                     local->ops->beacon_update(local_to_hw(local),
2584                                              skb, &control) == 0) {
2585                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2586                                "template based on scan results\n", dev->name);
2587                         skb = NULL;
2588                 }
2589
2590                 rates = 0;
2591                 mode = local->oper_hw_mode;
2592                 for (i = 0; i < bss->supp_rates_len; i++) {
2593                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2594                         for (j = 0; j < mode->num_rates; j++)
2595                                 if (mode->rates[j].rate == bitrate)
2596                                         rates |= BIT(j);
2597                 }
2598                 ifsta->supp_rates_bits = rates;
2599         } while (0);
2600
2601         if (skb) {
2602                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2603                        "template\n", dev->name);
2604                 dev_kfree_skb(skb);
2605         }
2606
2607         ifsta->state = IEEE80211_IBSS_JOINED;
2608         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2609
2610         ieee80211_rx_bss_put(dev, bss);
2611
2612         return res;
2613 }
2614
2615
2616 static int ieee80211_sta_create_ibss(struct net_device *dev,
2617                                      struct ieee80211_if_sta *ifsta)
2618 {
2619         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2620         struct ieee80211_sta_bss *bss;
2621         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2622         struct ieee80211_hw_mode *mode;
2623         u8 bssid[ETH_ALEN], *pos;
2624         int i;
2625         DECLARE_MAC_BUF(mac);
2626
2627 #if 0
2628         /* Easier testing, use fixed BSSID. */
2629         memset(bssid, 0xfe, ETH_ALEN);
2630 #else
2631         /* Generate random, not broadcast, locally administered BSSID. Mix in
2632          * own MAC address to make sure that devices that do not have proper
2633          * random number generator get different BSSID. */
2634         get_random_bytes(bssid, ETH_ALEN);
2635         for (i = 0; i < ETH_ALEN; i++)
2636                 bssid[i] ^= dev->dev_addr[i];
2637         bssid[0] &= ~0x01;
2638         bssid[0] |= 0x02;
2639 #endif
2640
2641         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2642                dev->name, print_mac(mac, bssid));
2643
2644         bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2645                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2646         if (!bss)
2647                 return -ENOMEM;
2648
2649         mode = local->oper_hw_mode;
2650
2651         if (local->hw.conf.beacon_int == 0)
2652                 local->hw.conf.beacon_int = 100;
2653         bss->beacon_int = local->hw.conf.beacon_int;
2654         bss->hw_mode = local->hw.conf.phymode;
2655         bss->freq = local->hw.conf.freq;
2656         bss->last_update = jiffies;
2657         bss->capability = WLAN_CAPABILITY_IBSS;
2658         if (sdata->default_key) {
2659                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2660         } else
2661                 sdata->drop_unencrypted = 0;
2662         bss->supp_rates_len = mode->num_rates;
2663         pos = bss->supp_rates;
2664         for (i = 0; i < mode->num_rates; i++) {
2665                 int rate = mode->rates[i].rate;
2666                 *pos++ = (u8) (rate / 5);
2667         }
2668
2669         return ieee80211_sta_join_ibss(dev, ifsta, bss);
2670 }
2671
2672
2673 static int ieee80211_sta_find_ibss(struct net_device *dev,
2674                                    struct ieee80211_if_sta *ifsta)
2675 {
2676         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2677         struct ieee80211_sta_bss *bss;
2678         int found = 0;
2679         u8 bssid[ETH_ALEN];
2680         int active_ibss;
2681         DECLARE_MAC_BUF(mac);
2682         DECLARE_MAC_BUF(mac2);
2683
2684         if (ifsta->ssid_len == 0)
2685                 return -EINVAL;
2686
2687         active_ibss = ieee80211_sta_active_ibss(dev);
2688 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2689         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2690                dev->name, active_ibss);
2691 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2692         spin_lock_bh(&local->sta_bss_lock);
2693         list_for_each_entry(bss, &local->sta_bss_list, list) {
2694                 if (ifsta->ssid_len != bss->ssid_len ||
2695                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2696                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
2697                         continue;
2698 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2699                 printk(KERN_DEBUG "   bssid=%s found\n",
2700                        print_mac(mac, bss->bssid));
2701 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2702                 memcpy(bssid, bss->bssid, ETH_ALEN);
2703                 found = 1;
2704                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2705                         break;
2706         }
2707         spin_unlock_bh(&local->sta_bss_lock);
2708
2709 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2710         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
2711                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
2712 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2713         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2714             (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2715                                         ifsta->ssid, ifsta->ssid_len))) {
2716                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2717                        " based on configured SSID\n",
2718                        dev->name, print_mac(mac, bssid));
2719                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2720         }
2721 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2722         printk(KERN_DEBUG "   did not try to join ibss\n");
2723 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2724
2725         /* Selected IBSS not found in current scan results - try to scan */
2726         if (ifsta->state == IEEE80211_IBSS_JOINED &&
2727             !ieee80211_sta_active_ibss(dev)) {
2728                 mod_timer(&ifsta->timer, jiffies +
2729                                       IEEE80211_IBSS_MERGE_INTERVAL);
2730         } else if (time_after(jiffies, local->last_scan_completed +
2731                               IEEE80211_SCAN_INTERVAL)) {
2732                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2733                        "join\n", dev->name);
2734                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2735                                               ifsta->ssid_len);
2736         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2737                 int interval = IEEE80211_SCAN_INTERVAL;
2738
2739                 if (time_after(jiffies, ifsta->ibss_join_req +
2740                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
2741                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2742                             local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2743                                 return ieee80211_sta_create_ibss(dev, ifsta);
2744                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2745                                 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2746                                        " configured channel %d (%d MHz)\n",
2747                                        dev->name, local->hw.conf.channel,
2748                                        local->hw.conf.freq);
2749                         }
2750
2751                         /* No IBSS found - decrease scan interval and continue
2752                          * scanning. */
2753                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
2754                 }
2755
2756                 ifsta->state = IEEE80211_IBSS_SEARCH;
2757                 mod_timer(&ifsta->timer, jiffies + interval);
2758                 return 0;
2759         }
2760
2761         return 0;
2762 }
2763
2764
2765 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2766 {
2767         struct ieee80211_sub_if_data *sdata;
2768         struct ieee80211_if_sta *ifsta;
2769         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2770
2771         if (len > IEEE80211_MAX_SSID_LEN)
2772                 return -EINVAL;
2773
2774         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2775          * not defined. */
2776         if (local->ops->conf_tx) {
2777                 struct ieee80211_tx_queue_params qparam;
2778                 int i;
2779
2780                 memset(&qparam, 0, sizeof(qparam));
2781                 /* TODO: are these ok defaults for all hw_modes? */
2782                 qparam.aifs = 2;
2783                 qparam.cw_min =
2784                         local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2785                 qparam.cw_max = 1023;
2786                 qparam.burst_time = 0;
2787                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2788                 {
2789                         local->ops->conf_tx(local_to_hw(local),
2790                                            i + IEEE80211_TX_QUEUE_DATA0,
2791                                            &qparam);
2792                 }
2793                 /* IBSS uses different parameters for Beacon sending */
2794                 qparam.cw_min++;
2795                 qparam.cw_min *= 2;
2796                 qparam.cw_min--;
2797                 local->ops->conf_tx(local_to_hw(local),
2798                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
2799         }
2800
2801         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2802         ifsta = &sdata->u.sta;
2803
2804         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2805                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2806         memcpy(ifsta->ssid, ssid, len);
2807         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2808         ifsta->ssid_len = len;
2809
2810         if (len)
2811                 ifsta->flags |= IEEE80211_STA_SSID_SET;
2812         else
2813                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2814         if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2815             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2816                 ifsta->ibss_join_req = jiffies;
2817                 ifsta->state = IEEE80211_IBSS_SEARCH;
2818                 return ieee80211_sta_find_ibss(dev, ifsta);
2819         }
2820         return 0;
2821 }
2822
2823
2824 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2825 {
2826         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2827         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2828         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2829         *len = ifsta->ssid_len;
2830         return 0;
2831 }
2832
2833
2834 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2835 {
2836         struct ieee80211_sub_if_data *sdata;
2837         struct ieee80211_if_sta *ifsta;
2838         int res;
2839
2840         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2841         ifsta = &sdata->u.sta;
2842
2843         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2844                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2845                 res = ieee80211_if_config(dev);
2846                 if (res) {
2847                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2848                                "the low-level driver\n", dev->name);
2849                         return res;
2850                 }
2851         }
2852
2853         if (is_valid_ether_addr(bssid))
2854                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2855         else
2856                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2857
2858         return 0;
2859 }
2860
2861
2862 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2863                                     struct ieee80211_sub_if_data *sdata,
2864                                     int powersave)
2865 {
2866         struct sk_buff *skb;
2867         struct ieee80211_hdr *nullfunc;
2868         u16 fc;
2869
2870         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2871         if (!skb) {
2872                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2873                        "frame\n", sdata->dev->name);
2874                 return;
2875         }
2876         skb_reserve(skb, local->hw.extra_tx_headroom);
2877
2878         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2879         memset(nullfunc, 0, 24);
2880         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2881              IEEE80211_FCTL_TODS;
2882         if (powersave)
2883                 fc |= IEEE80211_FCTL_PM;
2884         nullfunc->frame_control = cpu_to_le16(fc);
2885         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2886         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2887         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2888
2889         ieee80211_sta_tx(sdata->dev, skb, 0);
2890 }
2891
2892
2893 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2894 {
2895         struct ieee80211_local *local = hw_to_local(hw);
2896         struct net_device *dev = local->scan_dev;
2897         struct ieee80211_sub_if_data *sdata;
2898         union iwreq_data wrqu;
2899
2900         local->last_scan_completed = jiffies;
2901         memset(&wrqu, 0, sizeof(wrqu));
2902         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2903
2904         if (local->sta_hw_scanning) {
2905                 local->sta_hw_scanning = 0;
2906                 goto done;
2907         }
2908
2909         local->sta_sw_scanning = 0;
2910         if (ieee80211_hw_config(local))
2911                 printk(KERN_DEBUG "%s: failed to restore operational "
2912                        "channel after scan\n", dev->name);
2913
2914
2915         netif_tx_lock_bh(local->mdev);
2916         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
2917         local->ops->configure_filter(local_to_hw(local),
2918                                      FIF_BCN_PRBRESP_PROMISC,
2919                                      &local->filter_flags,
2920                                      local->mdev->mc_count,
2921                                      local->mdev->mc_list);
2922
2923         netif_tx_unlock_bh(local->mdev);
2924
2925         rcu_read_lock();
2926         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2927
2928                 /* No need to wake the master device. */
2929                 if (sdata->dev == local->mdev)
2930                         continue;
2931
2932                 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2933                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
2934                                 ieee80211_send_nullfunc(local, sdata, 0);
2935                         ieee80211_sta_timer((unsigned long)sdata);
2936                 }
2937
2938                 netif_wake_queue(sdata->dev);
2939         }
2940         rcu_read_unlock();
2941
2942 done:
2943         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2944         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2945                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2946                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2947                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
2948                     !ieee80211_sta_active_ibss(dev)))
2949                         ieee80211_sta_find_ibss(dev, ifsta);
2950         }
2951 }
2952 EXPORT_SYMBOL(ieee80211_scan_completed);
2953
2954 void ieee80211_sta_scan_work(struct work_struct *work)
2955 {
2956         struct ieee80211_local *local =
2957                 container_of(work, struct ieee80211_local, scan_work.work);
2958         struct net_device *dev = local->scan_dev;
2959         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2960         struct ieee80211_hw_mode *mode;
2961         struct ieee80211_channel *chan;
2962         int skip;
2963         unsigned long next_delay = 0;
2964
2965         if (!local->sta_sw_scanning)
2966                 return;
2967
2968         switch (local->scan_state) {
2969         case SCAN_SET_CHANNEL:
2970                 mode = local->scan_hw_mode;
2971                 if (local->scan_hw_mode->list.next == &local->modes_list &&
2972                     local->scan_channel_idx >= mode->num_channels) {
2973                         ieee80211_scan_completed(local_to_hw(local));
2974                         return;
2975                 }
2976                 skip = !(local->enabled_modes & (1 << mode->mode));
2977                 chan = &mode->channels[local->scan_channel_idx];
2978                 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2979                     (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2980                      !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2981                     (local->hw_modes & local->enabled_modes &
2982                      (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2983                         skip = 1;
2984
2985                 if (!skip) {
2986 #if 0
2987                         printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2988                                dev->name, chan->chan, chan->freq);
2989 #endif
2990
2991                         local->scan_channel = chan;
2992                         if (ieee80211_hw_config(local)) {
2993                                 printk(KERN_DEBUG "%s: failed to set channel "
2994                                        "%d (%d MHz) for scan\n", dev->name,
2995                                        chan->chan, chan->freq);
2996                                 skip = 1;
2997                         }
2998                 }
2999
3000                 local->scan_channel_idx++;
3001                 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3002                         if (local->scan_hw_mode->list.next != &local->modes_list) {
3003                                 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3004                                                                  struct ieee80211_hw_mode,
3005                                                                  list);
3006                                 local->scan_channel_idx = 0;
3007                         }
3008                 }
3009
3010                 if (skip)
3011                         break;
3012
3013                 next_delay = IEEE80211_PROBE_DELAY +
3014                              usecs_to_jiffies(local->hw.channel_change_time);
3015                 local->scan_state = SCAN_SEND_PROBE;
3016                 break;
3017         case SCAN_SEND_PROBE:
3018                 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3019                         ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3020                                                  local->scan_ssid_len);
3021                         next_delay = IEEE80211_CHANNEL_TIME;
3022                 } else
3023                         next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3024                 local->scan_state = SCAN_SET_CHANNEL;
3025                 break;
3026         }
3027
3028         if (local->sta_sw_scanning)
3029                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3030                                    next_delay);
3031 }
3032
3033
3034 static int ieee80211_sta_start_scan(struct net_device *dev,
3035                                     u8 *ssid, size_t ssid_len)
3036 {
3037         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3038         struct ieee80211_sub_if_data *sdata;
3039
3040         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3041                 return -EINVAL;
3042
3043         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3044          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3045          * BSSID: MACAddress
3046          * SSID
3047          * ScanType: ACTIVE, PASSIVE
3048          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3049          *    a Probe frame during active scanning
3050          * ChannelList
3051          * MinChannelTime (>= ProbeDelay), in TU
3052          * MaxChannelTime: (>= MinChannelTime), in TU
3053          */
3054
3055          /* MLME-SCAN.confirm
3056           * BSSDescriptionSet
3057           * ResultCode: SUCCESS, INVALID_PARAMETERS
3058          */
3059
3060         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3061                 if (local->scan_dev == dev)
3062                         return 0;
3063                 return -EBUSY;
3064         }
3065
3066         if (local->ops->hw_scan) {
3067                 int rc = local->ops->hw_scan(local_to_hw(local),
3068                                              ssid, ssid_len);
3069                 if (!rc) {
3070                         local->sta_hw_scanning = 1;
3071                         local->scan_dev = dev;
3072                 }
3073                 return rc;
3074         }
3075
3076         local->sta_sw_scanning = 1;
3077
3078         rcu_read_lock();
3079         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3080
3081                 /* Don't stop the master interface, otherwise we can't transmit
3082                  * probes! */
3083                 if (sdata->dev == local->mdev)
3084                         continue;
3085
3086                 netif_stop_queue(sdata->dev);
3087                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
3088                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3089                         ieee80211_send_nullfunc(local, sdata, 1);
3090         }
3091         rcu_read_unlock();
3092
3093         if (ssid) {
3094                 local->scan_ssid_len = ssid_len;
3095                 memcpy(local->scan_ssid, ssid, ssid_len);
3096         } else
3097                 local->scan_ssid_len = 0;
3098         local->scan_state = SCAN_SET_CHANNEL;
3099         local->scan_hw_mode = list_entry(local->modes_list.next,
3100                                          struct ieee80211_hw_mode,
3101                                          list);
3102         local->scan_channel_idx = 0;
3103         local->scan_dev = dev;
3104
3105         netif_tx_lock_bh(local->mdev);
3106         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3107         local->ops->configure_filter(local_to_hw(local),
3108                                      FIF_BCN_PRBRESP_PROMISC,
3109                                      &local->filter_flags,
3110                                      local->mdev->mc_count,
3111                                      local->mdev->mc_list);
3112         netif_tx_unlock_bh(local->mdev);
3113
3114         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3115         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3116                            IEEE80211_CHANNEL_TIME);
3117
3118         return 0;
3119 }
3120
3121
3122 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3123 {
3124         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3125         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3126         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3127
3128         if (sdata->type != IEEE80211_IF_TYPE_STA)
3129                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3130
3131         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3132                 if (local->scan_dev == dev)
3133                         return 0;
3134                 return -EBUSY;
3135         }
3136
3137         ifsta->scan_ssid_len = ssid_len;
3138         if (ssid_len)
3139                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3140         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3141         queue_work(local->hw.workqueue, &ifsta->work);
3142         return 0;
3143 }
3144
3145 static char *
3146 ieee80211_sta_scan_result(struct net_device *dev,
3147                           struct ieee80211_sta_bss *bss,
3148                           char *current_ev, char *end_buf)
3149 {
3150         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3151         struct iw_event iwe;
3152
3153         if (time_after(jiffies,
3154                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3155                 return current_ev;
3156
3157         if (!(local->enabled_modes & (1 << bss->hw_mode)))
3158                 return current_ev;
3159
3160         memset(&iwe, 0, sizeof(iwe));
3161         iwe.cmd = SIOCGIWAP;
3162         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3163         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3164         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3165                                           IW_EV_ADDR_LEN);
3166
3167         memset(&iwe, 0, sizeof(iwe));
3168         iwe.cmd = SIOCGIWESSID;
3169         iwe.u.data.length = bss->ssid_len;
3170         iwe.u.data.flags = 1;
3171         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3172                                           bss->ssid);
3173
3174         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3175                 memset(&iwe, 0, sizeof(iwe));
3176                 iwe.cmd = SIOCGIWMODE;
3177                 if (bss->capability & WLAN_CAPABILITY_ESS)
3178                         iwe.u.mode = IW_MODE_MASTER;
3179                 else
3180                         iwe.u.mode = IW_MODE_ADHOC;
3181                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3182                                                   IW_EV_UINT_LEN);
3183         }
3184
3185         memset(&iwe, 0, sizeof(iwe));
3186         iwe.cmd = SIOCGIWFREQ;
3187         iwe.u.freq.m = bss->channel;
3188         iwe.u.freq.e = 0;
3189         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3190                                           IW_EV_FREQ_LEN);
3191         iwe.u.freq.m = bss->freq * 100000;
3192         iwe.u.freq.e = 1;
3193         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3194                                           IW_EV_FREQ_LEN);
3195
3196         memset(&iwe, 0, sizeof(iwe));
3197         iwe.cmd = IWEVQUAL;
3198         iwe.u.qual.qual = bss->signal;
3199         iwe.u.qual.level = bss->rssi;
3200         iwe.u.qual.noise = bss->noise;
3201         iwe.u.qual.updated = local->wstats_flags;
3202         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3203                                           IW_EV_QUAL_LEN);
3204
3205         memset(&iwe, 0, sizeof(iwe));
3206         iwe.cmd = SIOCGIWENCODE;
3207         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3208                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3209         else
3210                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3211         iwe.u.data.length = 0;
3212         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3213
3214         if (bss && bss->wpa_ie) {
3215                 memset(&iwe, 0, sizeof(iwe));
3216                 iwe.cmd = IWEVGENIE;
3217                 iwe.u.data.length = bss->wpa_ie_len;
3218                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3219                                                   bss->wpa_ie);
3220         }
3221
3222         if (bss && bss->rsn_ie) {
3223                 memset(&iwe, 0, sizeof(iwe));
3224                 iwe.cmd = IWEVGENIE;
3225                 iwe.u.data.length = bss->rsn_ie_len;
3226                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3227                                                   bss->rsn_ie);
3228         }
3229
3230         if (bss && bss->supp_rates_len > 0) {
3231                 /* display all supported rates in readable format */
3232                 char *p = current_ev + IW_EV_LCP_LEN;
3233                 int i;
3234
3235                 memset(&iwe, 0, sizeof(iwe));
3236                 iwe.cmd = SIOCGIWRATE;
3237                 /* Those two flags are ignored... */
3238                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3239
3240                 for (i = 0; i < bss->supp_rates_len; i++) {
3241                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3242                                                         0x7f) * 500000);
3243                         p = iwe_stream_add_value(current_ev, p,
3244                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3245                 }
3246                 current_ev = p;
3247         }
3248
3249         if (bss) {
3250                 char *buf;
3251                 buf = kmalloc(30, GFP_ATOMIC);
3252                 if (buf) {
3253                         memset(&iwe, 0, sizeof(iwe));
3254                         iwe.cmd = IWEVCUSTOM;
3255                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3256                         iwe.u.data.length = strlen(buf);
3257                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3258                                                           &iwe, buf);
3259                         kfree(buf);
3260                 }
3261         }
3262
3263         return current_ev;
3264 }
3265
3266
3267 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3268 {
3269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3270         char *current_ev = buf;
3271         char *end_buf = buf + len;
3272         struct ieee80211_sta_bss *bss;
3273
3274         spin_lock_bh(&local->sta_bss_lock);
3275         list_for_each_entry(bss, &local->sta_bss_list, list) {
3276                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3277                         spin_unlock_bh(&local->sta_bss_lock);
3278                         return -E2BIG;
3279                 }
3280                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3281                                                        end_buf);
3282         }
3283         spin_unlock_bh(&local->sta_bss_lock);
3284         return current_ev - buf;
3285 }
3286
3287
3288 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3289 {
3290         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3291         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3292         kfree(ifsta->extra_ie);
3293         if (len == 0) {
3294                 ifsta->extra_ie = NULL;
3295                 ifsta->extra_ie_len = 0;
3296                 return 0;
3297         }
3298         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3299         if (!ifsta->extra_ie) {
3300                 ifsta->extra_ie_len = 0;
3301                 return -ENOMEM;
3302         }
3303         memcpy(ifsta->extra_ie, ie, len);
3304         ifsta->extra_ie_len = len;
3305         return 0;
3306 }
3307
3308
3309 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3310                                          struct sk_buff *skb, u8 *bssid,
3311                                          u8 *addr)
3312 {
3313         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3314         struct sta_info *sta;
3315         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3316         DECLARE_MAC_BUF(mac);
3317
3318         /* TODO: Could consider removing the least recently used entry and
3319          * allow new one to be added. */
3320         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3321                 if (net_ratelimit()) {
3322                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3323                                "entry %s\n", dev->name, print_mac(mac, addr));
3324                 }
3325                 return NULL;
3326         }
3327
3328         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3329                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3330
3331         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3332         if (!sta)
3333                 return NULL;
3334
3335         sta->supp_rates = sdata->u.sta.supp_rates_bits;
3336
3337         rate_control_rate_init(sta, local);
3338
3339         return sta; /* caller will call sta_info_put() */
3340 }
3341
3342
3343 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3344 {
3345         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3346         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3347
3348         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3349                dev->name, reason);
3350
3351         if (sdata->type != IEEE80211_IF_TYPE_STA &&
3352             sdata->type != IEEE80211_IF_TYPE_IBSS)
3353                 return -EINVAL;
3354
3355         ieee80211_send_deauth(dev, ifsta, reason);
3356         ieee80211_set_disassoc(dev, ifsta, 1);
3357         return 0;
3358 }
3359
3360
3361 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3362 {
3363         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3364         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3365
3366         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3367                dev->name, reason);
3368
3369         if (sdata->type != IEEE80211_IF_TYPE_STA)
3370                 return -EINVAL;
3371
3372         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3373                 return -1;
3374
3375         ieee80211_send_disassoc(dev, ifsta, reason);
3376         ieee80211_set_disassoc(dev, ifsta, 0);
3377         return 0;
3378 }