err.no Git - linux-2.6/blob - net/mac80211/ieee80211_sta.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * 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 <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "ieee80211_rate.h"
  34 #include "ieee80211_led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  61
  62 #define ERP_INFO_USE_PROTECTION BIT(1)
  63
  64 /* mgmt header + 1 byte action code */
  65 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  66
  67 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  68 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  69 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  70 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  71 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  72
  73 /* next values represent the buffer size for A-MPDU frame.
  74  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  75 #define IEEE80211_MIN_AMPDU_BUF 0x8
  76 #define IEEE80211_MAX_AMPDU_BUF 0x40
  77
  78 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  79                                      u8 *ssid, size_t ssid_len);
  80 static struct ieee80211_sta_bss *
  81 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  82                      u8 *ssid, u8 ssid_len);
  83 static void ieee80211_rx_bss_put(struct net_device *dev,
  84                                  struct ieee80211_sta_bss *bss);
  85 static int ieee80211_sta_find_ibss(struct net_device *dev,
  86                                    struct ieee80211_if_sta *ifsta);
  87 static int ieee80211_sta_wep_configured(struct net_device *dev);
  88 static int ieee80211_sta_start_scan(struct net_device *dev,
  89                                     u8 *ssid, size_t ssid_len);
  90 static int ieee80211_sta_config_auth(struct net_device *dev,
  91                                      struct ieee80211_if_sta *ifsta);
  92
  93
  94 void ieee802_11_parse_elems(u8 *start, size_t len,
  95                             struct ieee802_11_elems *elems)
  96 {
  97         size_t left = len;
  98         u8 *pos = start;
  99
 100         memset(elems, 0, sizeof(*elems));
 101
 102         while (left >= 2) {
 103                 u8 id, elen;
 104
 105                 id = *pos++;
 106                 elen = *pos++;
 107                 left -= 2;
 108
 109                 if (elen > left)
 110                         return;
 111
 112                 switch (id) {
 113                 case WLAN_EID_SSID:
 114                         elems->ssid = pos;
 115                         elems->ssid_len = elen;
 116                         break;
 117                 case WLAN_EID_SUPP_RATES:
 118                         elems->supp_rates = pos;
 119                         elems->supp_rates_len = elen;
 120                         break;
 121                 case WLAN_EID_FH_PARAMS:
 122                         elems->fh_params = pos;
 123                         elems->fh_params_len = elen;
 124                         break;
 125                 case WLAN_EID_DS_PARAMS:
 126                         elems->ds_params = pos;
 127                         elems->ds_params_len = elen;
 128                         break;
 129                 case WLAN_EID_CF_PARAMS:
 130                         elems->cf_params = pos;
 131                         elems->cf_params_len = elen;
 132                         break;
 133                 case WLAN_EID_TIM:
 134                         elems->tim = pos;
 135                         elems->tim_len = elen;
 136                         break;
 137                 case WLAN_EID_IBSS_PARAMS:
 138                         elems->ibss_params = pos;
 139                         elems->ibss_params_len = elen;
 140                         break;
 141                 case WLAN_EID_CHALLENGE:
 142                         elems->challenge = pos;
 143                         elems->challenge_len = elen;
 144                         break;
 145                 case WLAN_EID_WPA:
 146                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 147                             pos[2] == 0xf2) {
 148                                 /* Microsoft OUI (00:50:F2) */
 149                                 if (pos[3] == 1) {
 150                                         /* OUI Type 1 - WPA IE */
 151                                         elems->wpa = pos;
 152                                         elems->wpa_len = elen;
 153                                 } else if (elen >= 5 && pos[3] == 2) {
 154                                         if (pos[4] == 0) {
 155                                                 elems->wmm_info = pos;
 156                                                 elems->wmm_info_len = elen;
 157                                         } else if (pos[4] == 1) {
 158                                                 elems->wmm_param = pos;
 159                                                 elems->wmm_param_len = elen;
 160                                         }
 161                                 }
 162                         }
 163                         break;
 164                 case WLAN_EID_RSN:
 165                         elems->rsn = pos;
 166                         elems->rsn_len = elen;
 167                         break;
 168                 case WLAN_EID_ERP_INFO:
 169                         elems->erp_info = pos;
 170                         elems->erp_info_len = elen;
 171                         break;
 172                 case WLAN_EID_EXT_SUPP_RATES:
 173                         elems->ext_supp_rates = pos;
 174                         elems->ext_supp_rates_len = elen;
 175                         break;
 176                 case WLAN_EID_HT_CAPABILITY:
 177                         elems->ht_cap_elem = pos;
 178                         elems->ht_cap_elem_len = elen;
 179                         break;
 180                 case WLAN_EID_HT_EXTRA_INFO:
 181                         elems->ht_info_elem = pos;
 182                         elems->ht_info_elem_len = elen;
 183                         break;
 184                 case WLAN_EID_MESH_ID:
 185                         elems->mesh_id = pos;
 186                         elems->mesh_id_len = elen;
 187                         break;
 188                 case WLAN_EID_MESH_CONFIG:
 189                         elems->mesh_config = pos;
 190                         elems->mesh_config_len = elen;
 191                         break;
 192                 case WLAN_EID_PEER_LINK:
 193                         elems->peer_link = pos;
 194                         elems->peer_link_len = elen;
 195                         break;
 196                 case WLAN_EID_PREQ:
 197                         elems->preq = pos;
 198                         elems->preq_len = elen;
 199                         break;
 200                 case WLAN_EID_PREP:
 201                         elems->prep = pos;
 202                         elems->prep_len = elen;
 203                         break;
 204                 case WLAN_EID_PERR:
 205                         elems->perr = pos;
 206                         elems->perr_len = elen;
 207                         break;
 208                 default:
 209                         break;
 210                 }
 211
 212                 left -= elen;
 213                 pos += elen;
 214         }
 215 }
 216
 217
 218 static int ecw2cw(int ecw)
 219 {
 220         return (1 << ecw) - 1;
 221 }
 222
 223 static void ieee80211_sta_wmm_params(struct net_device *dev,
 224                                      struct ieee80211_if_sta *ifsta,
 225                                      u8 *wmm_param, size_t wmm_param_len)
 226 {
 227         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 228         struct ieee80211_tx_queue_params params;
 229         size_t left;
 230         int count;
 231         u8 *pos;
 232
 233         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 234                 return;
 235         count = wmm_param[6] & 0x0f;
 236         if (count == ifsta->wmm_last_param_set)
 237                 return;
 238         ifsta->wmm_last_param_set = count;
 239
 240         pos = wmm_param + 8;
 241         left = wmm_param_len - 8;
 242
 243         memset(&params, 0, sizeof(params));
 244
 245         if (!local->ops->conf_tx)
 246                 return;
 247
 248         local->wmm_acm = 0;
 249         for (; left >= 4; left -= 4, pos += 4) {
 250                 int aci = (pos[0] >> 5) & 0x03;
 251                 int acm = (pos[0] >> 4) & 0x01;
 252                 int queue;
 253
 254                 switch (aci) {
 255                 case 1:
 256                         queue = IEEE80211_TX_QUEUE_DATA3;
 257                         if (acm) {
 258                                 local->wmm_acm |= BIT(0) | BIT(3);
 259                         }
 260                         break;
 261                 case 2:
 262                         queue = IEEE80211_TX_QUEUE_DATA1;
 263                         if (acm) {
 264                                 local->wmm_acm |= BIT(4) | BIT(5);
 265                         }
 266                         break;
 267                 case 3:
 268                         queue = IEEE80211_TX_QUEUE_DATA0;
 269                         if (acm) {
 270                                 local->wmm_acm |= BIT(6) | BIT(7);
 271                         }
 272                         break;
 273                 case 0:
 274                 default:
 275                         queue = IEEE80211_TX_QUEUE_DATA2;
 276                         if (acm) {
 277                                 local->wmm_acm |= BIT(1) | BIT(2);
 278                         }
 279                         break;
 280                 }
 281
 282                 params.aifs = pos[0] & 0x0f;
 283                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 284                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 285                 params.txop = pos[2] | (pos[3] << 8);
 286 #ifdef CONFIG_MAC80211_DEBUG
 287                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 288                        "cWmin=%d cWmax=%d txop=%d\n",
 289                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 290                        params.cw_max, params.txop);
 291 #endif
 292                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 293                  * AC for now) */
 294                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 295                         printk(KERN_DEBUG "%s: failed to set TX queue "
 296                                "parameters for queue %d\n", dev->name, queue);
 297                 }
 298         }
 299 }
 300
 301
 302 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 303                                    u8 erp_value)
 304 {
 305         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 306         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 307         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 308         bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 309         DECLARE_MAC_BUF(mac);
 310         u32 changed = 0;
 311
 312         if (use_protection != bss_conf->use_cts_prot) {
 313                 if (net_ratelimit()) {
 314                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 315                                "%s)\n",
 316                                sdata->dev->name,
 317                                use_protection ? "enabled" : "disabled",
 318                                print_mac(mac, ifsta->bssid));
 319                 }
 320                 bss_conf->use_cts_prot = use_protection;
 321                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 322         }
 323
 324         if (preamble_mode != bss_conf->use_short_preamble) {
 325                 if (net_ratelimit()) {
 326                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 327                                " (BSSID=%s)\n",
 328                                sdata->dev->name,
 329                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 330                                         "short" : "long",
 331                                print_mac(mac, ifsta->bssid));
 332                 }
 333                 bss_conf->use_short_preamble = preamble_mode;
 334                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 335         }
 336
 337         return changed;
 338 }
 339
 340 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 341                                    struct ieee80211_ht_info *ht_info)
 342 {
 343
 344         if (ht_info == NULL)
 345                 return -EINVAL;
 346
 347         memset(ht_info, 0, sizeof(*ht_info));
 348
 349         if (ht_cap_ie) {
 350                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 351
 352                 ht_info->ht_supported = 1;
 353                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 354                 ht_info->ampdu_factor =
 355                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 356                 ht_info->ampdu_density =
 357                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 358                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 359         } else
 360                 ht_info->ht_supported = 0;
 361
 362         return 0;
 363 }
 364
 365 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 366                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 367                         struct ieee80211_ht_bss_info *bss_info)
 368 {
 369         if (bss_info == NULL)
 370                 return -EINVAL;
 371
 372         memset(bss_info, 0, sizeof(*bss_info));
 373
 374         if (ht_add_info_ie) {
 375                 u16 op_mode;
 376                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 377
 378                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 379                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 380                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 381         }
 382
 383         return 0;
 384 }
 385
 386 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 387                                          struct ieee80211_if_sta *ifsta)
 388 {
 389         char *buf;
 390         size_t len;
 391         int i;
 392         union iwreq_data wrqu;
 393
 394         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 395                 return;
 396
 397         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 398                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 399         if (!buf)
 400                 return;
 401
 402         len = sprintf(buf, "ASSOCINFO(");
 403         if (ifsta->assocreq_ies) {
 404                 len += sprintf(buf + len, "ReqIEs=");
 405                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 406                         len += sprintf(buf + len, "%02x",
 407                                        ifsta->assocreq_ies[i]);
 408                 }
 409         }
 410         if (ifsta->assocresp_ies) {
 411                 if (ifsta->assocreq_ies)
 412                         len += sprintf(buf + len, " ");
 413                 len += sprintf(buf + len, "RespIEs=");
 414                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 415                         len += sprintf(buf + len, "%02x",
 416                                        ifsta->assocresp_ies[i]);
 417                 }
 418         }
 419         len += sprintf(buf + len, ")");
 420
 421         if (len > IW_CUSTOM_MAX) {
 422                 len = sprintf(buf, "ASSOCRESPIE=");
 423                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 424                         len += sprintf(buf + len, "%02x",
 425                                        ifsta->assocresp_ies[i]);
 426                 }
 427         }
 428
 429         memset(&wrqu, 0, sizeof(wrqu));
 430         wrqu.data.length = len;
 431         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 432
 433         kfree(buf);
 434 }
 435
 436
 437 static void ieee80211_set_associated(struct net_device *dev,
 438                                      struct ieee80211_if_sta *ifsta,
 439                                      bool assoc)
 440 {
 441         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 442         struct ieee80211_local *local = sdata->local;
 443         union iwreq_data wrqu;
 444         u32 changed = BSS_CHANGED_ASSOC;
 445
 446         if (assoc) {
 447                 struct ieee80211_sta_bss *bss;
 448
 449                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 450
 451                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 452                         return;
 453
 454                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 455                                            local->hw.conf.channel->center_freq,
 456                                            ifsta->ssid, ifsta->ssid_len);
 457                 if (bss) {
 458                         if (bss->has_erp_value)
 459                                 changed |= ieee80211_handle_erp_ie(
 460                                                 sdata, bss->erp_value);
 461                         ieee80211_rx_bss_put(dev, bss);
 462                 }
 463
 464                 netif_carrier_on(dev);
 465                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 466                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 467                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 468                 ieee80211_sta_send_associnfo(dev, ifsta);
 469         } else {
 470                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 471
 472                 netif_carrier_off(dev);
 473                 ieee80211_reset_erp_info(dev);
 474                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 475         }
 476         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 477         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 478         ifsta->last_probe = jiffies;
 479         ieee80211_led_assoc(local, assoc);
 480
 481         sdata->bss_conf.assoc = assoc;
 482         ieee80211_bss_info_change_notify(sdata, changed);
 483 }
 484
 485 static void ieee80211_set_disassoc(struct net_device *dev,
 486                                    struct ieee80211_if_sta *ifsta, int deauth)
 487 {
 488         if (deauth)
 489                 ifsta->auth_tries = 0;
 490         ifsta->assoc_tries = 0;
 491         ieee80211_set_associated(dev, ifsta, 0);
 492 }
 493
 494 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 495                       int encrypt)
 496 {
 497         struct ieee80211_sub_if_data *sdata;
 498         struct ieee80211_tx_packet_data *pkt_data;
 499
 500         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 501         skb->dev = sdata->local->mdev;
 502         skb_set_mac_header(skb, 0);
 503         skb_set_network_header(skb, 0);
 504         skb_set_transport_header(skb, 0);
 505
 506         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 507         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 508         pkt_data->ifindex = sdata->dev->ifindex;
 509         if (!encrypt)
 510                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 511
 512         dev_queue_xmit(skb);
 513 }
 514
 515
 516 static void ieee80211_send_auth(struct net_device *dev,
 517                                 struct ieee80211_if_sta *ifsta,
 518                                 int transaction, u8 *extra, size_t extra_len,
 519                                 int encrypt)
 520 {
 521         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 522         struct sk_buff *skb;
 523         struct ieee80211_mgmt *mgmt;
 524
 525         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 526                             sizeof(*mgmt) + 6 + extra_len);
 527         if (!skb) {
 528                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 529                        "frame\n", dev->name);
 530                 return;
 531         }
 532         skb_reserve(skb, local->hw.extra_tx_headroom);
 533
 534         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 535         memset(mgmt, 0, 24 + 6);
 536         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 537                                            IEEE80211_STYPE_AUTH);
 538         if (encrypt)
 539                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 540         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 541         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 542         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 543         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 544         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 545         ifsta->auth_transaction = transaction + 1;
 546         mgmt->u.auth.status_code = cpu_to_le16(0);
 547         if (extra)
 548                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 549
 550         ieee80211_sta_tx(dev, skb, encrypt);
 551 }
 552
 553
 554 static void ieee80211_authenticate(struct net_device *dev,
 555                                    struct ieee80211_if_sta *ifsta)
 556 {
 557         DECLARE_MAC_BUF(mac);
 558
 559         ifsta->auth_tries++;
 560         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 561                 printk(KERN_DEBUG "%s: authentication with AP %s"
 562                        " timed out\n",
 563                        dev->name, print_mac(mac, ifsta->bssid));
 564                 ifsta->state = IEEE80211_DISABLED;
 565                 return;
 566         }
 567
 568         ifsta->state = IEEE80211_AUTHENTICATE;
 569         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 570                dev->name, print_mac(mac, ifsta->bssid));
 571
 572         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 573
 574         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 575 }
 576
 577
 578 static void ieee80211_send_assoc(struct net_device *dev,
 579                                  struct ieee80211_if_sta *ifsta)
 580 {
 581         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 582         struct sk_buff *skb;
 583         struct ieee80211_mgmt *mgmt;
 584         u8 *pos, *ies;
 585         int i, len;
 586         u16 capab;
 587         struct ieee80211_sta_bss *bss;
 588         int wmm = 0;
 589         struct ieee80211_supported_band *sband;
 590
 591         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 592                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 593                             ifsta->ssid_len);
 594         if (!skb) {
 595                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 596                        "frame\n", dev->name);
 597                 return;
 598         }
 599         skb_reserve(skb, local->hw.extra_tx_headroom);
 600
 601         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 602
 603         capab = ifsta->capab;
 604
 605         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 606                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 607                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 608                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 609                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 610         }
 611
 612         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 613                                    local->hw.conf.channel->center_freq,
 614                                    ifsta->ssid, ifsta->ssid_len);
 615         if (bss) {
 616                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 617                         capab |= WLAN_CAPABILITY_PRIVACY;
 618                 if (bss->wmm_ie) {
 619                         wmm = 1;
 620                 }
 621                 ieee80211_rx_bss_put(dev, bss);
 622         }
 623
 624         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 625         memset(mgmt, 0, 24);
 626         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 627         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 628         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 629
 630         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 631                 skb_put(skb, 10);
 632                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 633                                                    IEEE80211_STYPE_REASSOC_REQ);
 634                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 635                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 636                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 637                        ETH_ALEN);
 638         } else {
 639                 skb_put(skb, 4);
 640                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 641                                                    IEEE80211_STYPE_ASSOC_REQ);
 642                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 643                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 644         }
 645
 646         /* SSID */
 647         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 648         *pos++ = WLAN_EID_SSID;
 649         *pos++ = ifsta->ssid_len;
 650         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 651
 652         len = sband->n_bitrates;
 653         if (len > 8)
 654                 len = 8;
 655         pos = skb_put(skb, len + 2);
 656         *pos++ = WLAN_EID_SUPP_RATES;
 657         *pos++ = len;
 658         for (i = 0; i < len; i++) {
 659                 int rate = sband->bitrates[i].bitrate;
 660                 *pos++ = (u8) (rate / 5);
 661         }
 662
 663         if (sband->n_bitrates > len) {
 664                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 665                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 666                 *pos++ = sband->n_bitrates - len;
 667                 for (i = len; i < sband->n_bitrates; i++) {
 668                         int rate = sband->bitrates[i].bitrate;
 669                         *pos++ = (u8) (rate / 5);
 670                 }
 671         }
 672
 673         if (ifsta->extra_ie) {
 674                 pos = skb_put(skb, ifsta->extra_ie_len);
 675                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 676         }
 677
 678         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 679                 pos = skb_put(skb, 9);
 680                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 681                 *pos++ = 7; /* len */
 682                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 683                 *pos++ = 0x50;
 684                 *pos++ = 0xf2;
 685                 *pos++ = 2; /* WME */
 686                 *pos++ = 0; /* WME info */
 687                 *pos++ = 1; /* WME ver */
 688                 *pos++ = 0;
 689         }
 690         /* wmm support is a must to HT */
 691         if (wmm && sband->ht_info.ht_supported) {
 692                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 693                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 694                 *pos++ = WLAN_EID_HT_CAPABILITY;
 695                 *pos++ = sizeof(struct ieee80211_ht_cap);
 696                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 697                 memcpy(pos, &tmp, sizeof(u16));
 698                 pos += sizeof(u16);
 699                 /* TODO: needs a define here for << 2 */
 700                 *pos++ = sband->ht_info.ampdu_factor |
 701                          (sband->ht_info.ampdu_density << 2);
 702                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 703         }
 704
 705         kfree(ifsta->assocreq_ies);
 706         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 707         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 708         if (ifsta->assocreq_ies)
 709                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 710
 711         ieee80211_sta_tx(dev, skb, 0);
 712 }
 713
 714
 715 static void ieee80211_send_deauth(struct net_device *dev,
 716                                   struct ieee80211_if_sta *ifsta, u16 reason)
 717 {
 718         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 719         struct sk_buff *skb;
 720         struct ieee80211_mgmt *mgmt;
 721
 722         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 723         if (!skb) {
 724                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 725                        "frame\n", dev->name);
 726                 return;
 727         }
 728         skb_reserve(skb, local->hw.extra_tx_headroom);
 729
 730         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 731         memset(mgmt, 0, 24);
 732         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 733         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 734         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 735         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 736                                            IEEE80211_STYPE_DEAUTH);
 737         skb_put(skb, 2);
 738         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 739
 740         ieee80211_sta_tx(dev, skb, 0);
 741 }
 742
 743
 744 static void ieee80211_send_disassoc(struct net_device *dev,
 745                                     struct ieee80211_if_sta *ifsta, u16 reason)
 746 {
 747         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 748         struct sk_buff *skb;
 749         struct ieee80211_mgmt *mgmt;
 750
 751         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 752         if (!skb) {
 753                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 754                        "frame\n", dev->name);
 755                 return;
 756         }
 757         skb_reserve(skb, local->hw.extra_tx_headroom);
 758
 759         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 760         memset(mgmt, 0, 24);
 761         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 762         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 763         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 764         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 765                                            IEEE80211_STYPE_DISASSOC);
 766         skb_put(skb, 2);
 767         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 768
 769         ieee80211_sta_tx(dev, skb, 0);
 770 }
 771
 772
 773 static int ieee80211_privacy_mismatch(struct net_device *dev,
 774                                       struct ieee80211_if_sta *ifsta)
 775 {
 776         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 777         struct ieee80211_sta_bss *bss;
 778         int bss_privacy;
 779         int wep_privacy;
 780         int privacy_invoked;
 781
 782         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 783                 return 0;
 784
 785         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 786                                    local->hw.conf.channel->center_freq,
 787                                    ifsta->ssid, ifsta->ssid_len);
 788         if (!bss)
 789                 return 0;
 790
 791         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 792         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 793         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 794
 795         ieee80211_rx_bss_put(dev, bss);
 796
 797         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 798                 return 0;
 799
 800         return 1;
 801 }
 802
 803
 804 static void ieee80211_associate(struct net_device *dev,
 805                                 struct ieee80211_if_sta *ifsta)
 806 {
 807         DECLARE_MAC_BUF(mac);
 808
 809         ifsta->assoc_tries++;
 810         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 811                 printk(KERN_DEBUG "%s: association with AP %s"
 812                        " timed out\n",
 813                        dev->name, print_mac(mac, ifsta->bssid));
 814                 ifsta->state = IEEE80211_DISABLED;
 815                 return;
 816         }
 817
 818         ifsta->state = IEEE80211_ASSOCIATE;
 819         printk(KERN_DEBUG "%s: associate with AP %s\n",
 820                dev->name, print_mac(mac, ifsta->bssid));
 821         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 822                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 823                        "mixed-cell disabled - abort association\n", dev->name);
 824                 ifsta->state = IEEE80211_DISABLED;
 825                 return;
 826         }
 827
 828         ieee80211_send_assoc(dev, ifsta);
 829
 830         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 831 }
 832
 833
 834 static void ieee80211_associated(struct net_device *dev,
 835                                  struct ieee80211_if_sta *ifsta)
 836 {
 837         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 838         struct sta_info *sta;
 839         int disassoc;
 840         DECLARE_MAC_BUF(mac);
 841
 842         /* TODO: start monitoring current AP signal quality and number of
 843          * missed beacons. Scan other channels every now and then and search
 844          * for better APs. */
 845         /* TODO: remove expired BSSes */
 846
 847         ifsta->state = IEEE80211_ASSOCIATED;
 848
 849         rcu_read_lock();
 850
 851         sta = sta_info_get(local, ifsta->bssid);
 852         if (!sta) {
 853                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 854                        dev->name, print_mac(mac, ifsta->bssid));
 855                 disassoc = 1;
 856         } else {
 857                 disassoc = 0;
 858                 if (time_after(jiffies,
 859                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 860                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 861                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 862                                        "current AP %s - assume out of "
 863                                        "range\n",
 864                                        dev->name, print_mac(mac, ifsta->bssid));
 865                                 disassoc = 1;
 866                                 sta_info_unlink(&sta);
 867                         } else
 868                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 869                                                          local->scan_ssid,
 870                                                          local->scan_ssid_len);
 871                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 872                 } else {
 873                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 874                         if (time_after(jiffies, ifsta->last_probe +
 875                                        IEEE80211_PROBE_INTERVAL)) {
 876                                 ifsta->last_probe = jiffies;
 877                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 878                                                          ifsta->ssid,
 879                                                          ifsta->ssid_len);
 880                         }
 881                 }
 882         }
 883
 884         rcu_read_unlock();
 885
 886         if (disassoc && sta) {
 887                 synchronize_rcu();
 888                 rtnl_lock();
 889                 sta_info_destroy(sta);
 890                 rtnl_unlock();
 891         }
 892
 893         if (disassoc) {
 894                 ifsta->state = IEEE80211_DISABLED;
 895                 ieee80211_set_associated(dev, ifsta, 0);
 896         } else {
 897                 mod_timer(&ifsta->timer, jiffies +
 898                                       IEEE80211_MONITORING_INTERVAL);
 899         }
 900 }
 901
 902
 903 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 904                                      u8 *ssid, size_t ssid_len)
 905 {
 906         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 907         struct ieee80211_supported_band *sband;
 908         struct sk_buff *skb;
 909         struct ieee80211_mgmt *mgmt;
 910         u8 *pos, *supp_rates, *esupp_rates = NULL;
 911         int i;
 912
 913         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 914         if (!skb) {
 915                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 916                        "request\n", dev->name);
 917                 return;
 918         }
 919         skb_reserve(skb, local->hw.extra_tx_headroom);
 920
 921         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 922         memset(mgmt, 0, 24);
 923         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 924                                            IEEE80211_STYPE_PROBE_REQ);
 925         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 926         if (dst) {
 927                 memcpy(mgmt->da, dst, ETH_ALEN);
 928                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 929         } else {
 930                 memset(mgmt->da, 0xff, ETH_ALEN);
 931                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 932         }
 933         pos = skb_put(skb, 2 + ssid_len);
 934         *pos++ = WLAN_EID_SSID;
 935         *pos++ = ssid_len;
 936         memcpy(pos, ssid, ssid_len);
 937
 938         supp_rates = skb_put(skb, 2);
 939         supp_rates[0] = WLAN_EID_SUPP_RATES;
 940         supp_rates[1] = 0;
 941         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 942
 943         for (i = 0; i < sband->n_bitrates; i++) {
 944                 struct ieee80211_rate *rate = &sband->bitrates[i];
 945                 if (esupp_rates) {
 946                         pos = skb_put(skb, 1);
 947                         esupp_rates[1]++;
 948                 } else if (supp_rates[1] == 8) {
 949                         esupp_rates = skb_put(skb, 3);
 950                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 951                         esupp_rates[1] = 1;
 952                         pos = &esupp_rates[2];
 953                 } else {
 954                         pos = skb_put(skb, 1);
 955                         supp_rates[1]++;
 956                 }
 957                 *pos = rate->bitrate / 5;
 958         }
 959
 960         ieee80211_sta_tx(dev, skb, 0);
 961 }
 962
 963
 964 static int ieee80211_sta_wep_configured(struct net_device *dev)
 965 {
 966         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 967         if (!sdata || !sdata->default_key ||
 968             sdata->default_key->conf.alg != ALG_WEP)
 969                 return 0;
 970         return 1;
 971 }
 972
 973
 974 static void ieee80211_auth_completed(struct net_device *dev,
 975                                      struct ieee80211_if_sta *ifsta)
 976 {
 977         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 978         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 979         ieee80211_associate(dev, ifsta);
 980 }
 981
 982
 983 static void ieee80211_auth_challenge(struct net_device *dev,
 984                                      struct ieee80211_if_sta *ifsta,
 985                                      struct ieee80211_mgmt *mgmt,
 986                                      size_t len)
 987 {
 988         u8 *pos;
 989         struct ieee802_11_elems elems;
 990
 991         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 992         pos = mgmt->u.auth.variable;
 993         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 994         if (!elems.challenge) {
 995                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 996                        "frame\n", dev->name);
 997                 return;
 998         }
 999         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1000                             elems.challenge_len + 2, 1);
1001 }
1002
1003 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1004                                         u8 dialog_token, u16 status, u16 policy,
1005                                         u16 buf_size, u16 timeout)
1006 {
1007         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1008         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1009         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1010         struct sk_buff *skb;
1011         struct ieee80211_mgmt *mgmt;
1012         u16 capab;
1013
1014         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1015                                         sizeof(mgmt->u.action.u.addba_resp));
1016         if (!skb) {
1017                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1018                        "for addba resp frame\n", dev->name);
1019                 return;
1020         }
1021
1022         skb_reserve(skb, local->hw.extra_tx_headroom);
1023         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1024         memset(mgmt, 0, 24);
1025         memcpy(mgmt->da, da, ETH_ALEN);
1026         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1027         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1028                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1029         else
1030                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1031         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1032                                            IEEE80211_STYPE_ACTION);
1033
1034         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1035         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1036         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1037         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1038
1039         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1040         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1041         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1042
1043         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1044         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1045         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1046
1047         ieee80211_sta_tx(dev, skb, 0);
1048
1049         return;
1050 }
1051
1052 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1053                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1054                                 u16 agg_size, u16 timeout)
1055 {
1056         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1057         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1058         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1059         struct sk_buff *skb;
1060         struct ieee80211_mgmt *mgmt;
1061         u16 capab;
1062
1063         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1064                                 sizeof(mgmt->u.action.u.addba_req));
1065
1066
1067         if (!skb) {
1068                 printk(KERN_ERR "%s: failed to allocate buffer "
1069                                 "for addba request frame\n", dev->name);
1070                 return;
1071         }
1072         skb_reserve(skb, local->hw.extra_tx_headroom);
1073         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1074         memset(mgmt, 0, 24);
1075         memcpy(mgmt->da, da, ETH_ALEN);
1076         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1077         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1078                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1079         else
1080                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1081
1082         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1083                                         IEEE80211_STYPE_ACTION);
1084
1085         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1086
1087         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1088         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1089
1090         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1091         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1092         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1093         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1094
1095         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1096
1097         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1098         mgmt->u.action.u.addba_req.start_seq_num =
1099                                         cpu_to_le16(start_seq_num << 4);
1100
1101         ieee80211_sta_tx(dev, skb, 0);
1102 }
1103
1104 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1105                                                 struct ieee80211_mgmt *mgmt,
1106                                                 size_t len)
1107 {
1108         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1109         struct ieee80211_hw *hw = &local->hw;
1110         struct ieee80211_conf *conf = &hw->conf;
1111         struct sta_info *sta;
1112         struct tid_ampdu_rx *tid_agg_rx;
1113         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1114         u8 dialog_token;
1115         int ret = -EOPNOTSUPP;
1116         DECLARE_MAC_BUF(mac);
1117
1118         rcu_read_lock();
1119
1120         sta = sta_info_get(local, mgmt->sa);
1121         if (!sta) {
1122                 rcu_read_unlock();
1123                 return;
1124         }
1125
1126         /* extract session parameters from addba request frame */
1127         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1128         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1129         start_seq_num =
1130                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1131
1132         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1133         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1134         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1135         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1136
1137         status = WLAN_STATUS_REQUEST_DECLINED;
1138
1139         /* sanity check for incoming parameters:
1140          * check if configuration can support the BA policy
1141          * and if buffer size does not exceeds max value */
1142         if (((ba_policy != 1)
1143                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1144                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1145                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1146 #ifdef CONFIG_MAC80211_HT_DEBUG
1147                 if (net_ratelimit())
1148                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1149                                 "%s on tid %u. policy %d, buffer size %d\n",
1150                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1151                                 buf_size);
1152 #endif /* CONFIG_MAC80211_HT_DEBUG */
1153                 goto end_no_lock;
1154         }
1155         /* determine default buffer size */
1156         if (buf_size == 0) {
1157                 struct ieee80211_supported_band *sband;
1158
1159                 sband = local->hw.wiphy->bands[conf->channel->band];
1160                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1161                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1162         }
1163
1164         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1165
1166         /* examine state machine */
1167         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1168
1169         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1170 #ifdef CONFIG_MAC80211_HT_DEBUG
1171                 if (net_ratelimit())
1172                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1173                                 "%s on tid %u\n",
1174                                 print_mac(mac, mgmt->sa), tid);
1175 #endif /* CONFIG_MAC80211_HT_DEBUG */
1176                 goto end;
1177         }
1178
1179         /* prepare reordering buffer */
1180         tid_agg_rx->reorder_buf =
1181                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1182         if (!tid_agg_rx->reorder_buf) {
1183                 if (net_ratelimit())
1184                         printk(KERN_ERR "can not allocate reordering buffer "
1185                                "to tid %d\n", tid);
1186                 goto end;
1187         }
1188         memset(tid_agg_rx->reorder_buf, 0,
1189                 buf_size * sizeof(struct sk_buf *));
1190
1191         if (local->ops->ampdu_action)
1192                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1193                                                sta->addr, tid, &start_seq_num);
1194 #ifdef CONFIG_MAC80211_HT_DEBUG
1195         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1196 #endif /* CONFIG_MAC80211_HT_DEBUG */
1197
1198         if (ret) {
1199                 kfree(tid_agg_rx->reorder_buf);
1200                 goto end;
1201         }
1202
1203         /* change state and send addba resp */
1204         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1205         tid_agg_rx->dialog_token = dialog_token;
1206         tid_agg_rx->ssn = start_seq_num;
1207         tid_agg_rx->head_seq_num = start_seq_num;
1208         tid_agg_rx->buf_size = buf_size;
1209         tid_agg_rx->timeout = timeout;
1210         tid_agg_rx->stored_mpdu_num = 0;
1211         status = WLAN_STATUS_SUCCESS;
1212 end:
1213         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1214
1215 end_no_lock:
1216         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1217                                   dialog_token, status, 1, buf_size, timeout);
1218         rcu_read_unlock();
1219 }
1220
1221 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1222                                              struct ieee80211_mgmt *mgmt,
1223                                              size_t len)
1224 {
1225         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1226         struct ieee80211_hw *hw = &local->hw;
1227         struct sta_info *sta;
1228         u16 capab;
1229         u16 tid;
1230         u8 *state;
1231
1232         rcu_read_lock();
1233
1234         sta = sta_info_get(local, mgmt->sa);
1235         if (!sta) {
1236                 rcu_read_unlock();
1237                 return;
1238         }
1239
1240         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1241         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1242
1243         state = &sta->ampdu_mlme.tid_tx[tid].state;
1244
1245         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1246
1247         if (mgmt->u.action.u.addba_resp.dialog_token !=
1248                 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1249                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1250 #ifdef CONFIG_MAC80211_HT_DEBUG
1251                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1252 #endif /* CONFIG_MAC80211_HT_DEBUG */
1253                 rcu_read_unlock();
1254                 return;
1255         }
1256
1257         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1258 #ifdef CONFIG_MAC80211_HT_DEBUG
1259         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1260 #endif /* CONFIG_MAC80211_HT_DEBUG */
1261         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1262                         == WLAN_STATUS_SUCCESS) {
1263                 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1264                         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1265                         printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1266                                 "%d\n", *state);
1267                         rcu_read_unlock();
1268                         return;
1269                 }
1270
1271                 if (*state & HT_ADDBA_RECEIVED_MSK)
1272                         printk(KERN_DEBUG "double addBA response\n");
1273
1274                 *state |= HT_ADDBA_RECEIVED_MSK;
1275                 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1276
1277                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1278                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1279                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1280                 }
1281
1282                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1283                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1284         } else {
1285                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1286
1287                 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1288                 /* this will allow the state check in stop_BA_session */
1289                 *state = HT_AGG_STATE_OPERATIONAL;
1290                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1291                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1292                                              WLAN_BACK_INITIATOR);
1293         }
1294         rcu_read_unlock();
1295 }
1296
1297 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1298                           u16 initiator, u16 reason_code)
1299 {
1300         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1301         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1302         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1303         struct sk_buff *skb;
1304         struct ieee80211_mgmt *mgmt;
1305         u16 params;
1306
1307         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1308                                         sizeof(mgmt->u.action.u.delba));
1309
1310         if (!skb) {
1311                 printk(KERN_ERR "%s: failed to allocate buffer "
1312                                         "for delba frame\n", dev->name);
1313                 return;
1314         }
1315
1316         skb_reserve(skb, local->hw.extra_tx_headroom);
1317         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1318         memset(mgmt, 0, 24);
1319         memcpy(mgmt->da, da, ETH_ALEN);
1320         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1321         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1322                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1323         else
1324                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1325         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1326                                         IEEE80211_STYPE_ACTION);
1327
1328         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1329
1330         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1331         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1332         params = (u16)(initiator << 11);        /* bit 11 initiator */
1333         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1334
1335         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1336         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1337
1338         ieee80211_sta_tx(dev, skb, 0);
1339 }
1340
1341 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1342                                         u16 initiator, u16 reason)
1343 {
1344         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1345         struct ieee80211_hw *hw = &local->hw;
1346         struct sta_info *sta;
1347         int ret, i;
1348
1349         rcu_read_lock();
1350
1351         sta = sta_info_get(local, ra);
1352         if (!sta) {
1353                 rcu_read_unlock();
1354                 return;
1355         }
1356
1357         /* check if TID is in operational state */
1358         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1359         if (sta->ampdu_mlme.tid_rx[tid].state
1360                                 != HT_AGG_STATE_OPERATIONAL) {
1361                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1362                 rcu_read_unlock();
1363                 return;
1364         }
1365         sta->ampdu_mlme.tid_rx[tid].state =
1366                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1367                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1368                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1369
1370         /* stop HW Rx aggregation. ampdu_action existence
1371          * already verified in session init so we add the BUG_ON */
1372         BUG_ON(!local->ops->ampdu_action);
1373
1374         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1375                                         ra, tid, NULL);
1376         if (ret)
1377                 printk(KERN_DEBUG "HW problem - can not stop rx "
1378                                 "aggergation for tid %d\n", tid);
1379
1380         /* shutdown timer has not expired */
1381         if (initiator != WLAN_BACK_TIMER)
1382                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1383                                         session_timer);
1384
1385         /* check if this is a self generated aggregation halt */
1386         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1387                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1388
1389         /* free the reordering buffer */
1390         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1391                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1392                         /* release the reordered frames */
1393                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1394                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1395                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1396                 }
1397         }
1398         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1399
1400         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1401         rcu_read_unlock();
1402 }
1403
1404
1405 static void ieee80211_sta_process_delba(struct net_device *dev,
1406                         struct ieee80211_mgmt *mgmt, size_t len)
1407 {
1408         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1409         struct sta_info *sta;
1410         u16 tid, params;
1411         u16 initiator;
1412         DECLARE_MAC_BUF(mac);
1413
1414         rcu_read_lock();
1415
1416         sta = sta_info_get(local, mgmt->sa);
1417         if (!sta) {
1418                 rcu_read_unlock();
1419                 return;
1420         }
1421
1422         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1423         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1424         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1425
1426 #ifdef CONFIG_MAC80211_HT_DEBUG
1427         if (net_ratelimit())
1428                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1429                         print_mac(mac, mgmt->sa),
1430                         initiator ? "recipient" : "initiator", tid,
1431                         mgmt->u.action.u.delba.reason_code);
1432 #endif /* CONFIG_MAC80211_HT_DEBUG */
1433
1434         if (initiator == WLAN_BACK_INITIATOR)
1435                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1436                                                  WLAN_BACK_INITIATOR, 0);
1437         else { /* WLAN_BACK_RECIPIENT */
1438                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1439                 sta->ampdu_mlme.tid_tx[tid].state =
1440                                 HT_AGG_STATE_OPERATIONAL;
1441                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1442                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1443                                              WLAN_BACK_RECIPIENT);
1444         }
1445         rcu_read_unlock();
1446 }
1447
1448 /*
1449  * After sending add Block Ack request we activated a timer until
1450  * add Block Ack response will arrive from the recipient.
1451  * If this timer expires sta_addba_resp_timer_expired will be executed.
1452  */
1453 void sta_addba_resp_timer_expired(unsigned long data)
1454 {
1455         /* not an elegant detour, but there is no choice as the timer passes
1456          * only one argument, and both sta_info and TID are needed, so init
1457          * flow in sta_info_add gives the TID as data, while the timer_to_id
1458          * array gives the sta through container_of */
1459         u16 tid = *(int *)data;
1460         struct sta_info *temp_sta = container_of((void *)data,
1461                 struct sta_info, timer_to_tid[tid]);
1462
1463         struct ieee80211_local *local = temp_sta->local;
1464         struct ieee80211_hw *hw = &local->hw;
1465         struct sta_info *sta;
1466         u8 *state;
1467
1468         rcu_read_lock();
1469
1470         sta = sta_info_get(local, temp_sta->addr);
1471         if (!sta) {
1472                 rcu_read_unlock();
1473                 return;
1474         }
1475
1476         state = &sta->ampdu_mlme.tid_tx[tid].state;
1477         /* check if the TID waits for addBA response */
1478         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1479         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1480                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1481                 *state = HT_AGG_STATE_IDLE;
1482                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1483                                 "expecting addBA response there", tid);
1484                 goto timer_expired_exit;
1485         }
1486
1487         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1488
1489         /* go through the state check in stop_BA_session */
1490         *state = HT_AGG_STATE_OPERATIONAL;
1491         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1492         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1493                                      WLAN_BACK_INITIATOR);
1494
1495 timer_expired_exit:
1496         rcu_read_unlock();
1497 }
1498
1499 /*
1500  * After receiving Block Ack Request (BAR) we activated a
1501  * timer after each frame arrives from the originator.
1502  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1503  */
1504 void sta_rx_agg_session_timer_expired(unsigned long data)
1505 {
1506         /* not an elegant detour, but there is no choice as the timer passes
1507          * only one argument, and verious sta_info are needed here, so init
1508          * flow in sta_info_add gives the TID as data, while the timer_to_id
1509          * array gives the sta through container_of */
1510         u8 *ptid = (u8 *)data;
1511         u8 *timer_to_id = ptid - *ptid;
1512         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1513                                          timer_to_tid[0]);
1514
1515         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1516         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1517                                          (u16)*ptid, WLAN_BACK_TIMER,
1518                                          WLAN_REASON_QSTA_TIMEOUT);
1519 }
1520
1521
1522 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1523                                    struct ieee80211_if_sta *ifsta,
1524                                    struct ieee80211_mgmt *mgmt,
1525                                    size_t len)
1526 {
1527         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1528         u16 auth_alg, auth_transaction, status_code;
1529         DECLARE_MAC_BUF(mac);
1530
1531         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1532             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1533                 printk(KERN_DEBUG "%s: authentication frame received from "
1534                        "%s, but not in authenticate state - ignored\n",
1535                        dev->name, print_mac(mac, mgmt->sa));
1536                 return;
1537         }
1538
1539         if (len < 24 + 6) {
1540                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1541                        "received from %s - ignored\n",
1542                        dev->name, len, print_mac(mac, mgmt->sa));
1543                 return;
1544         }
1545
1546         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1547             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1548                 printk(KERN_DEBUG "%s: authentication frame received from "
1549                        "unknown AP (SA=%s BSSID=%s) - "
1550                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1551                        print_mac(mac, mgmt->bssid));
1552                 return;
1553         }
1554
1555         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1556             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1557                 printk(KERN_DEBUG "%s: authentication frame received from "
1558                        "unknown BSSID (SA=%s BSSID=%s) - "
1559                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1560                        print_mac(mac, mgmt->bssid));
1561                 return;
1562         }
1563
1564         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1565         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1566         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1567
1568         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1569                "transaction=%d status=%d)\n",
1570                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1571                auth_transaction, status_code);
1572
1573         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1574                 /* IEEE 802.11 standard does not require authentication in IBSS
1575                  * networks and most implementations do not seem to use it.
1576                  * However, try to reply to authentication attempts if someone
1577                  * has actually implemented this.
1578                  * TODO: Could implement shared key authentication. */
1579                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1580                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1581                                "frame (alg=%d transaction=%d)\n",
1582                                dev->name, auth_alg, auth_transaction);
1583                         return;
1584                 }
1585                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1586         }
1587
1588         if (auth_alg != ifsta->auth_alg ||
1589             auth_transaction != ifsta->auth_transaction) {
1590                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1591                        "(alg=%d transaction=%d)\n",
1592                        dev->name, auth_alg, auth_transaction);
1593                 return;
1594         }
1595
1596         if (status_code != WLAN_STATUS_SUCCESS) {
1597                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1598                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1599                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1600                         u8 algs[3];
1601                         const int num_algs = ARRAY_SIZE(algs);
1602                         int i, pos;
1603                         algs[0] = algs[1] = algs[2] = 0xff;
1604                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1605                                 algs[0] = WLAN_AUTH_OPEN;
1606                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1607                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1608                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1609                                 algs[2] = WLAN_AUTH_LEAP;
1610                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1611                                 pos = 0;
1612                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1613                                 pos = 1;
1614                         else
1615                                 pos = 2;
1616                         for (i = 0; i < num_algs; i++) {
1617                                 pos++;
1618                                 if (pos >= num_algs)
1619                                         pos = 0;
1620                                 if (algs[pos] == ifsta->auth_alg ||
1621                                     algs[pos] == 0xff)
1622                                         continue;
1623                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1624                                     !ieee80211_sta_wep_configured(dev))
1625                                         continue;
1626                                 ifsta->auth_alg = algs[pos];
1627                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1628                                        "next try\n",
1629                                        dev->name, ifsta->auth_alg);
1630                                 break;
1631                         }
1632                 }
1633                 return;
1634         }
1635
1636         switch (ifsta->auth_alg) {
1637         case WLAN_AUTH_OPEN:
1638         case WLAN_AUTH_LEAP:
1639                 ieee80211_auth_completed(dev, ifsta);
1640                 break;
1641         case WLAN_AUTH_SHARED_KEY:
1642                 if (ifsta->auth_transaction == 4)
1643                         ieee80211_auth_completed(dev, ifsta);
1644                 else
1645                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1646                 break;
1647         }
1648 }
1649
1650
1651 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1652                                      struct ieee80211_if_sta *ifsta,
1653                                      struct ieee80211_mgmt *mgmt,
1654                                      size_t len)
1655 {
1656         u16 reason_code;
1657         DECLARE_MAC_BUF(mac);
1658
1659         if (len < 24 + 2) {
1660                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1661                        "received from %s - ignored\n",
1662                        dev->name, len, print_mac(mac, mgmt->sa));
1663                 return;
1664         }
1665
1666         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1667                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1668                        "unknown AP (SA=%s BSSID=%s) - "
1669                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1670                        print_mac(mac, mgmt->bssid));
1671                 return;
1672         }
1673
1674         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1675
1676         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1677                " (reason=%d)\n",
1678                dev->name, print_mac(mac, mgmt->sa), reason_code);
1679
1680         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1681                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1682         }
1683
1684         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1685             ifsta->state == IEEE80211_ASSOCIATE ||
1686             ifsta->state == IEEE80211_ASSOCIATED) {
1687                 ifsta->state = IEEE80211_AUTHENTICATE;
1688                 mod_timer(&ifsta->timer, jiffies +
1689                                       IEEE80211_RETRY_AUTH_INTERVAL);
1690         }
1691
1692         ieee80211_set_disassoc(dev, ifsta, 1);
1693         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1694 }
1695
1696
1697 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1698                                        struct ieee80211_if_sta *ifsta,
1699                                        struct ieee80211_mgmt *mgmt,
1700                                        size_t len)
1701 {
1702         u16 reason_code;
1703         DECLARE_MAC_BUF(mac);
1704
1705         if (len < 24 + 2) {
1706                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1707                        "received from %s - ignored\n",
1708                        dev->name, len, print_mac(mac, mgmt->sa));
1709                 return;
1710         }
1711
1712         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1713                 printk(KERN_DEBUG "%s: disassociation frame received from "
1714                        "unknown AP (SA=%s BSSID=%s) - "
1715                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1716                        print_mac(mac, mgmt->bssid));
1717                 return;
1718         }
1719
1720         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1721
1722         printk(KERN_DEBUG "%s: RX disassociation from %s"
1723                " (reason=%d)\n",
1724                dev->name, print_mac(mac, mgmt->sa), reason_code);
1725
1726         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1727                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1728
1729         if (ifsta->state == IEEE80211_ASSOCIATED) {
1730                 ifsta->state = IEEE80211_ASSOCIATE;
1731                 mod_timer(&ifsta->timer, jiffies +
1732                                       IEEE80211_RETRY_AUTH_INTERVAL);
1733         }
1734
1735         ieee80211_set_disassoc(dev, ifsta, 0);
1736 }
1737
1738
1739 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1740                                          struct ieee80211_if_sta *ifsta,
1741                                          struct ieee80211_mgmt *mgmt,
1742                                          size_t len,
1743                                          int reassoc)
1744 {
1745         struct ieee80211_local *local = sdata->local;
1746         struct net_device *dev = sdata->dev;
1747         struct ieee80211_supported_band *sband;
1748         struct sta_info *sta;
1749         u64 rates, basic_rates;
1750         u16 capab_info, status_code, aid;
1751         struct ieee802_11_elems elems;
1752         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1753         u8 *pos;
1754         int i, j;
1755         DECLARE_MAC_BUF(mac);
1756         bool have_higher_than_11mbit = false;
1757
1758         /* AssocResp and ReassocResp have identical structure, so process both
1759          * of them in this function. */
1760
1761         if (ifsta->state != IEEE80211_ASSOCIATE) {
1762                 printk(KERN_DEBUG "%s: association frame received from "
1763                        "%s, but not in associate state - ignored\n",
1764                        dev->name, print_mac(mac, mgmt->sa));
1765                 return;
1766         }
1767
1768         if (len < 24 + 6) {
1769                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1770                        "received from %s - ignored\n",
1771                        dev->name, len, print_mac(mac, mgmt->sa));
1772                 return;
1773         }
1774
1775         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1776                 printk(KERN_DEBUG "%s: association frame received from "
1777                        "unknown AP (SA=%s BSSID=%s) - "
1778                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1779                        print_mac(mac, mgmt->bssid));
1780                 return;
1781         }
1782
1783         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1784         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1785         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1786
1787         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1788                "status=%d aid=%d)\n",
1789                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1790                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1791
1792         if (status_code != WLAN_STATUS_SUCCESS) {
1793                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1794                        dev->name, status_code);
1795                 /* if this was a reassociation, ensure we try a "full"
1796                  * association next time. This works around some broken APs
1797                  * which do not correctly reject reassociation requests. */
1798                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1799                 return;
1800         }
1801
1802         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1803                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1804                        "set\n", dev->name, aid);
1805         aid &= ~(BIT(15) | BIT(14));
1806
1807         pos = mgmt->u.assoc_resp.variable;
1808         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1809
1810         if (!elems.supp_rates) {
1811                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1812                        dev->name);
1813                 return;
1814         }
1815
1816         printk(KERN_DEBUG "%s: associated\n", dev->name);
1817         ifsta->aid = aid;
1818         ifsta->ap_capab = capab_info;
1819
1820         kfree(ifsta->assocresp_ies);
1821         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1822         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1823         if (ifsta->assocresp_ies)
1824                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1825
1826         rcu_read_lock();
1827
1828         /* Add STA entry for the AP */
1829         sta = sta_info_get(local, ifsta->bssid);
1830         if (!sta) {
1831                 struct ieee80211_sta_bss *bss;
1832
1833                 sta = sta_info_add(sdata, ifsta->bssid);
1834                 if (IS_ERR(sta)) {
1835                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1836                                " AP (error %ld)\n", dev->name, PTR_ERR(sta));
1837                         rcu_read_unlock();
1838                         return;
1839                 }
1840                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1841                                            local->hw.conf.channel->center_freq,
1842                                            ifsta->ssid, ifsta->ssid_len);
1843                 if (bss) {
1844                         sta->last_rssi = bss->rssi;
1845                         sta->last_signal = bss->signal;
1846                         sta->last_noise = bss->noise;
1847                         ieee80211_rx_bss_put(dev, bss);
1848                 }
1849         }
1850
1851         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1852                       WLAN_STA_AUTHORIZED;
1853
1854         rates = 0;
1855         basic_rates = 0;
1856         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1857
1858         for (i = 0; i < elems.supp_rates_len; i++) {
1859                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1860
1861                 if (rate > 110)
1862                         have_higher_than_11mbit = true;
1863
1864                 for (j = 0; j < sband->n_bitrates; j++) {
1865                         if (sband->bitrates[j].bitrate == rate)
1866                                 rates |= BIT(j);
1867                         if (elems.supp_rates[i] & 0x80)
1868                                 basic_rates |= BIT(j);
1869                 }
1870         }
1871
1872         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1873                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1874
1875                 if (rate > 110)
1876                         have_higher_than_11mbit = true;
1877
1878                 for (j = 0; j < sband->n_bitrates; j++) {
1879                         if (sband->bitrates[j].bitrate == rate)
1880                                 rates |= BIT(j);
1881                         if (elems.ext_supp_rates[i] & 0x80)
1882                                 basic_rates |= BIT(j);
1883                 }
1884         }
1885
1886         sta->supp_rates[local->hw.conf.channel->band] = rates;
1887         sdata->basic_rates = basic_rates;
1888
1889         /* cf. IEEE 802.11 9.2.12 */
1890         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1891             have_higher_than_11mbit)
1892                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1893         else
1894                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1895
1896         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1897             local->ops->conf_ht) {
1898                 struct ieee80211_ht_bss_info bss_info;
1899
1900                 ieee80211_ht_cap_ie_to_ht_info(
1901                                 (struct ieee80211_ht_cap *)
1902                                 elems.ht_cap_elem, &sta->ht_info);
1903                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1904                                 (struct ieee80211_ht_addt_info *)
1905                                 elems.ht_info_elem, &bss_info);
1906                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1907         }
1908
1909         rate_control_rate_init(sta, local);
1910
1911         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1912                 sta->flags |= WLAN_STA_WME;
1913                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1914                                          elems.wmm_param_len);
1915         }
1916
1917         /* set AID, ieee80211_set_associated() will tell the driver */
1918         bss_conf->aid = aid;
1919         ieee80211_set_associated(dev, ifsta, 1);
1920
1921         rcu_read_unlock();
1922
1923         ieee80211_associated(dev, ifsta);
1924 }
1925
1926
1927 /* Caller must hold local->sta_bss_lock */
1928 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1929                                         struct ieee80211_sta_bss *bss)
1930 {
1931         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1932         u8 hash_idx;
1933
1934         if (bss_mesh_cfg(bss))
1935                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
1936                                         bss_mesh_id_len(bss));
1937         else
1938                 hash_idx = STA_HASH(bss->bssid);
1939
1940         bss->hnext = local->sta_bss_hash[hash_idx];
1941         local->sta_bss_hash[hash_idx] = bss;
1942 }
1943
1944
1945 /* Caller must hold local->sta_bss_lock */
1946 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1947                                         struct ieee80211_sta_bss *bss)
1948 {
1949         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1950         struct ieee80211_sta_bss *b, *prev = NULL;
1951         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1952         while (b) {
1953                 if (b == bss) {
1954                         if (!prev)
1955                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1956                                         bss->hnext;
1957                         else
1958                                 prev->hnext = bss->hnext;
1959                         break;
1960                 }
1961                 prev = b;
1962                 b = b->hnext;
1963         }
1964 }
1965
1966
1967 static struct ieee80211_sta_bss *
1968 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1969                      u8 *ssid, u8 ssid_len)
1970 {
1971         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1972         struct ieee80211_sta_bss *bss;
1973
1974         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1975         if (!bss)
1976                 return NULL;
1977         atomic_inc(&bss->users);
1978         atomic_inc(&bss->users);
1979         memcpy(bss->bssid, bssid, ETH_ALEN);
1980         bss->freq = freq;
1981         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1982                 memcpy(bss->ssid, ssid, ssid_len);
1983                 bss->ssid_len = ssid_len;
1984         }
1985
1986         spin_lock_bh(&local->sta_bss_lock);
1987         /* TODO: order by RSSI? */
1988         list_add_tail(&bss->list, &local->sta_bss_list);
1989         __ieee80211_rx_bss_hash_add(dev, bss);
1990         spin_unlock_bh(&local->sta_bss_lock);
1991         return bss;
1992 }
1993
1994 static struct ieee80211_sta_bss *
1995 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1996                      u8 *ssid, u8 ssid_len)
1997 {
1998         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1999         struct ieee80211_sta_bss *bss;
2000
2001         spin_lock_bh(&local->sta_bss_lock);
2002         bss = local->sta_bss_hash[STA_HASH(bssid)];
2003         while (bss) {
2004                 if (!bss_mesh_cfg(bss) &&
2005                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2006                     bss->freq == freq &&
2007                     bss->ssid_len == ssid_len &&
2008                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2009                         atomic_inc(&bss->users);
2010                         break;
2011                 }
2012                 bss = bss->hnext;
2013         }
2014         spin_unlock_bh(&local->sta_bss_lock);
2015         return bss;
2016 }
2017
2018 #ifdef CONFIG_MAC80211_MESH
2019 static struct ieee80211_sta_bss *
2020 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2021                           u8 *mesh_cfg, int freq)
2022 {
2023         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2024         struct ieee80211_sta_bss *bss;
2025
2026         spin_lock_bh(&local->sta_bss_lock);
2027         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2028         while (bss) {
2029                 if (bss_mesh_cfg(bss) &&
2030                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2031                     bss->freq == freq &&
2032                     mesh_id_len == bss->mesh_id_len &&
2033                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2034                                                  mesh_id_len))) {
2035                         atomic_inc(&bss->users);
2036                         break;
2037                 }
2038                 bss = bss->hnext;
2039         }
2040         spin_unlock_bh(&local->sta_bss_lock);
2041         return bss;
2042 }
2043
2044 static struct ieee80211_sta_bss *
2045 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2046                           u8 *mesh_cfg, int freq)
2047 {
2048         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2049         struct ieee80211_sta_bss *bss;
2050
2051         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2052         if (!bss)
2053                 return NULL;
2054
2055         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2056         if (!bss->mesh_cfg) {
2057                 kfree(bss);
2058                 return NULL;
2059         }
2060
2061         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2062                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2063                 if (!bss->mesh_id) {
2064                         kfree(bss->mesh_cfg);
2065                         kfree(bss);
2066                         return NULL;
2067                 }
2068                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2069         }
2070
2071         atomic_inc(&bss->users);
2072         atomic_inc(&bss->users);
2073         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2074         bss->mesh_id_len = mesh_id_len;
2075         bss->freq = freq;
2076         spin_lock_bh(&local->sta_bss_lock);
2077         /* TODO: order by RSSI? */
2078         list_add_tail(&bss->list, &local->sta_bss_list);
2079         __ieee80211_rx_bss_hash_add(dev, bss);
2080         spin_unlock_bh(&local->sta_bss_lock);
2081         return bss;
2082 }
2083 #endif
2084
2085 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2086 {
2087         kfree(bss->wpa_ie);
2088         kfree(bss->rsn_ie);
2089         kfree(bss->wmm_ie);
2090         kfree(bss->ht_ie);
2091         kfree(bss_mesh_id(bss));
2092         kfree(bss_mesh_cfg(bss));
2093         kfree(bss);
2094 }
2095
2096
2097 static void ieee80211_rx_bss_put(struct net_device *dev,
2098                                  struct ieee80211_sta_bss *bss)
2099 {
2100         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2101         if (!atomic_dec_and_test(&bss->users))
2102                 return;
2103
2104         spin_lock_bh(&local->sta_bss_lock);
2105         __ieee80211_rx_bss_hash_del(dev, bss);
2106         list_del(&bss->list);
2107         spin_unlock_bh(&local->sta_bss_lock);
2108         ieee80211_rx_bss_free(bss);
2109 }
2110
2111
2112 void ieee80211_rx_bss_list_init(struct net_device *dev)
2113 {
2114         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2115         spin_lock_init(&local->sta_bss_lock);
2116         INIT_LIST_HEAD(&local->sta_bss_list);
2117 }
2118
2119
2120 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2121 {
2122         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2123         struct ieee80211_sta_bss *bss, *tmp;
2124
2125         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2126                 ieee80211_rx_bss_put(dev, bss);
2127 }
2128
2129
2130 static int ieee80211_sta_join_ibss(struct net_device *dev,
2131                                    struct ieee80211_if_sta *ifsta,
2132                                    struct ieee80211_sta_bss *bss)
2133 {
2134         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2135         int res, rates, i, j;
2136         struct sk_buff *skb;
2137         struct ieee80211_mgmt *mgmt;
2138         struct ieee80211_tx_control control;
2139         struct rate_selection ratesel;
2140         u8 *pos;
2141         struct ieee80211_sub_if_data *sdata;
2142         struct ieee80211_supported_band *sband;
2143
2144         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2145
2146         /* Remove possible STA entries from other IBSS networks. */
2147         sta_info_flush(local, NULL);
2148
2149         if (local->ops->reset_tsf) {
2150                 /* Reset own TSF to allow time synchronization work. */
2151                 local->ops->reset_tsf(local_to_hw(local));
2152         }
2153         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2154         res = ieee80211_if_config(dev);
2155         if (res)
2156                 return res;
2157
2158         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2159
2160         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2161         sdata->drop_unencrypted = bss->capability &
2162                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2163
2164         res = ieee80211_set_freq(local, bss->freq);
2165
2166         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2167                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2168                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2169                 return -1;
2170         }
2171
2172         /* Set beacon template */
2173         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2174         do {
2175                 if (!skb)
2176                         break;
2177
2178                 skb_reserve(skb, local->hw.extra_tx_headroom);
2179
2180                 mgmt = (struct ieee80211_mgmt *)
2181                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2182                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2183                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2184                                                    IEEE80211_STYPE_BEACON);
2185                 memset(mgmt->da, 0xff, ETH_ALEN);
2186                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2187                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2188                 mgmt->u.beacon.beacon_int =
2189                         cpu_to_le16(local->hw.conf.beacon_int);
2190                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2191
2192                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2193                 *pos++ = WLAN_EID_SSID;
2194                 *pos++ = ifsta->ssid_len;
2195                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2196
2197                 rates = bss->supp_rates_len;
2198                 if (rates > 8)
2199                         rates = 8;
2200                 pos = skb_put(skb, 2 + rates);
2201                 *pos++ = WLAN_EID_SUPP_RATES;
2202                 *pos++ = rates;
2203                 memcpy(pos, bss->supp_rates, rates);
2204
2205                 if (bss->band == IEEE80211_BAND_2GHZ) {
2206                         pos = skb_put(skb, 2 + 1);
2207                         *pos++ = WLAN_EID_DS_PARAMS;
2208                         *pos++ = 1;
2209                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2210                 }
2211
2212                 pos = skb_put(skb, 2 + 2);
2213                 *pos++ = WLAN_EID_IBSS_PARAMS;
2214                 *pos++ = 2;
2215                 /* FIX: set ATIM window based on scan results */
2216                 *pos++ = 0;
2217                 *pos++ = 0;
2218
2219                 if (bss->supp_rates_len > 8) {
2220                         rates = bss->supp_rates_len - 8;
2221                         pos = skb_put(skb, 2 + rates);
2222                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2223                         *pos++ = rates;
2224                         memcpy(pos, &bss->supp_rates[8], rates);
2225                 }
2226
2227                 memset(&control, 0, sizeof(control));
2228                 rate_control_get_rate(dev, sband, skb, &ratesel);
2229                 if (!ratesel.rate) {
2230                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2231                                "for IBSS beacon\n", dev->name);
2232                         break;
2233                 }
2234                 control.vif = &sdata->vif;
2235                 control.tx_rate = ratesel.rate;
2236                 if (sdata->bss_conf.use_short_preamble &&
2237                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2238                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2239                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2240                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2241                 control.retry_limit = 1;
2242
2243                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2244                 if (ifsta->probe_resp) {
2245                         mgmt = (struct ieee80211_mgmt *)
2246                                 ifsta->probe_resp->data;
2247                         mgmt->frame_control =
2248                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2249                                              IEEE80211_STYPE_PROBE_RESP);
2250                 } else {
2251                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2252                                "template for IBSS\n", dev->name);
2253                 }
2254
2255                 if (local->ops->beacon_update &&
2256                     local->ops->beacon_update(local_to_hw(local),
2257                                              skb, &control) == 0) {
2258                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2259                                "template\n", dev->name);
2260                         skb = NULL;
2261                 }
2262
2263                 rates = 0;
2264                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2265                 for (i = 0; i < bss->supp_rates_len; i++) {
2266                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2267                         for (j = 0; j < sband->n_bitrates; j++)
2268                                 if (sband->bitrates[j].bitrate == bitrate)
2269                                         rates |= BIT(j);
2270                 }
2271                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2272         } while (0);
2273
2274         if (skb) {
2275                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2276                        "template\n", dev->name);
2277                 dev_kfree_skb(skb);
2278         }
2279
2280         ifsta->state = IEEE80211_IBSS_JOINED;
2281         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2282
2283         ieee80211_rx_bss_put(dev, bss);
2284
2285         return res;
2286 }
2287
2288 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2289                             struct ieee802_11_elems *elems,
2290                             enum ieee80211_band band)
2291 {
2292         struct ieee80211_supported_band *sband;
2293         struct ieee80211_rate *bitrates;
2294         size_t num_rates;
2295         u64 supp_rates;
2296         int i, j;
2297         sband = local->hw.wiphy->bands[band];
2298
2299         if (!sband) {
2300                 WARN_ON(1);
2301                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2302         }
2303
2304         bitrates = sband->bitrates;
2305         num_rates = sband->n_bitrates;
2306         supp_rates = 0;
2307         for (i = 0; i < elems->supp_rates_len +
2308                      elems->ext_supp_rates_len; i++) {
2309                 u8 rate = 0;
2310                 int own_rate;
2311                 if (i < elems->supp_rates_len)
2312                         rate = elems->supp_rates[i];
2313                 else if (elems->ext_supp_rates)
2314                         rate = elems->ext_supp_rates
2315                                 [i - elems->supp_rates_len];
2316                 own_rate = 5 * (rate & 0x7f);
2317                 for (j = 0; j < num_rates; j++)
2318                         if (bitrates[j].bitrate == own_rate)
2319                                 supp_rates |= BIT(j);
2320         }
2321         return supp_rates;
2322 }
2323
2324
2325 static void ieee80211_rx_bss_info(struct net_device *dev,
2326                                   struct ieee80211_mgmt *mgmt,
2327                                   size_t len,
2328                                   struct ieee80211_rx_status *rx_status,
2329                                   int beacon)
2330 {
2331         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2332         struct ieee802_11_elems elems;
2333         size_t baselen;
2334         int freq, clen;
2335         struct ieee80211_sta_bss *bss;
2336         struct sta_info *sta;
2337         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2338         u64 beacon_timestamp, rx_timestamp;
2339         DECLARE_MAC_BUF(mac);
2340         DECLARE_MAC_BUF(mac2);
2341
2342         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2343                 return; /* ignore ProbeResp to foreign address */
2344
2345 #if 0
2346         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2347                dev->name, beacon ? "Beacon" : "Probe Response",
2348                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2349 #endif
2350
2351         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2352         if (baselen > len)
2353                 return;
2354
2355         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2356         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2357
2358         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2359             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2360                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2361                                                 rx_status->band);
2362
2363                 mesh_neighbour_update(mgmt->sa, rates, dev,
2364                                       mesh_peer_accepts_plinks(&elems, dev));
2365         }
2366
2367         rcu_read_lock();
2368
2369         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2370             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2371             (sta = sta_info_get(local, mgmt->sa))) {
2372                 u64 prev_rates;
2373                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2374                                                         rx_status->band);
2375
2376                 prev_rates = sta->supp_rates[rx_status->band];
2377                 sta->supp_rates[rx_status->band] &= supp_rates;
2378                 if (sta->supp_rates[rx_status->band] == 0) {
2379                         /* No matching rates - this should not really happen.
2380                          * Make sure that at least one rate is marked
2381                          * supported to avoid issues with TX rate ctrl. */
2382                         sta->supp_rates[rx_status->band] =
2383                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2384                 }
2385                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2386                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2387                                "%s based on beacon info (0x%llx & 0x%llx -> "
2388                                "0x%llx)\n",
2389                                dev->name, print_mac(mac, sta->addr),
2390                                (unsigned long long) prev_rates,
2391                                (unsigned long long) supp_rates,
2392                                (unsigned long long) sta->supp_rates[rx_status->band]);
2393                 }
2394         }
2395
2396         rcu_read_unlock();
2397
2398         if (elems.ds_params && elems.ds_params_len == 1)
2399                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2400         else
2401                 freq = rx_status->freq;
2402
2403 #ifdef CONFIG_MAC80211_MESH
2404         if (elems.mesh_config)
2405                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2406                                 elems.mesh_id_len, elems.mesh_config, freq);
2407         else
2408 #endif
2409                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2410                                            elems.ssid, elems.ssid_len);
2411         if (!bss) {
2412 #ifdef CONFIG_MAC80211_MESH
2413                 if (elems.mesh_config)
2414                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2415                                 elems.mesh_id_len, elems.mesh_config, freq);
2416                 else
2417 #endif
2418                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2419                                                    elems.ssid, elems.ssid_len);
2420                 if (!bss)
2421                         return;
2422         } else {
2423 #if 0
2424                 /* TODO: order by RSSI? */
2425                 spin_lock_bh(&local->sta_bss_lock);
2426                 list_move_tail(&bss->list, &local->sta_bss_list);
2427                 spin_unlock_bh(&local->sta_bss_lock);
2428 #endif
2429         }
2430
2431         bss->band = rx_status->band;
2432
2433         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2434             bss->probe_resp && beacon) {
2435                 /* STA mode:
2436                  * Do not allow beacon to override data from Probe Response. */
2437                 ieee80211_rx_bss_put(dev, bss);
2438                 return;
2439         }
2440
2441         /* save the ERP value so that it is available at association time */
2442         if (elems.erp_info && elems.erp_info_len >= 1) {
2443                 bss->erp_value = elems.erp_info[0];
2444                 bss->has_erp_value = 1;
2445         }
2446
2447         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2448         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2449
2450         bss->supp_rates_len = 0;
2451         if (elems.supp_rates) {
2452                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2453                 if (clen > elems.supp_rates_len)
2454                         clen = elems.supp_rates_len;
2455                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2456                        clen);
2457                 bss->supp_rates_len += clen;
2458         }
2459         if (elems.ext_supp_rates) {
2460                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2461                 if (clen > elems.ext_supp_rates_len)
2462                         clen = elems.ext_supp_rates_len;
2463                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2464                        elems.ext_supp_rates, clen);
2465                 bss->supp_rates_len += clen;
2466         }
2467
2468         if (elems.wpa &&
2469             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2470              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2471                 kfree(bss->wpa_ie);
2472                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2473                 if (bss->wpa_ie) {
2474                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2475                         bss->wpa_ie_len = elems.wpa_len + 2;
2476                 } else
2477                         bss->wpa_ie_len = 0;
2478         } else if (!elems.wpa && bss->wpa_ie) {
2479                 kfree(bss->wpa_ie);
2480                 bss->wpa_ie = NULL;
2481                 bss->wpa_ie_len = 0;
2482         }
2483
2484         if (elems.rsn &&
2485             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2486              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2487                 kfree(bss->rsn_ie);
2488                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2489                 if (bss->rsn_ie) {
2490                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2491                         bss->rsn_ie_len = elems.rsn_len + 2;
2492                 } else
2493                         bss->rsn_ie_len = 0;
2494         } else if (!elems.rsn && bss->rsn_ie) {
2495                 kfree(bss->rsn_ie);
2496                 bss->rsn_ie = NULL;
2497                 bss->rsn_ie_len = 0;
2498         }
2499
2500         if (elems.wmm_param &&
2501             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2502              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2503                 kfree(bss->wmm_ie);
2504                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2505                 if (bss->wmm_ie) {
2506                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2507                                elems.wmm_param_len + 2);
2508                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2509                 } else
2510                         bss->wmm_ie_len = 0;
2511         } else if (!elems.wmm_param && bss->wmm_ie) {
2512                 kfree(bss->wmm_ie);
2513                 bss->wmm_ie = NULL;
2514                 bss->wmm_ie_len = 0;
2515         }
2516         if (elems.ht_cap_elem &&
2517             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2518              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2519                 kfree(bss->ht_ie);
2520                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2521                 if (bss->ht_ie) {
2522                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2523                                elems.ht_cap_elem_len + 2);
2524                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2525                 } else
2526                         bss->ht_ie_len = 0;
2527         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2528                 kfree(bss->ht_ie);
2529                 bss->ht_ie = NULL;
2530                 bss->ht_ie_len = 0;
2531         }
2532
2533         bss->timestamp = beacon_timestamp;
2534         bss->last_update = jiffies;
2535         bss->rssi = rx_status->ssi;
2536         bss->signal = rx_status->signal;
2537         bss->noise = rx_status->noise;
2538         if (!beacon)
2539                 bss->probe_resp++;
2540
2541         /* check if we need to merge IBSS */
2542         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2543             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2544             bss->capability & WLAN_CAPABILITY_IBSS &&
2545             bss->freq == local->oper_channel->center_freq &&
2546             elems.ssid_len == sdata->u.sta.ssid_len &&
2547             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2548                 if (rx_status->flag & RX_FLAG_TSFT) {
2549                         /* in order for correct IBSS merging we need mactime
2550                          *
2551                          * since mactime is defined as the time the first data
2552                          * symbol of the frame hits the PHY, and the timestamp
2553                          * of the beacon is defined as "the time that the data
2554                          * symbol containing the first bit of the timestamp is
2555                          * transmitted to the PHY plus the transmitting STA’s
2556                          * delays through its local PHY from the MAC-PHY
2557                          * interface to its interface with the WM"
2558                          * (802.11 11.1.2) - equals the time this bit arrives at
2559                          * the receiver - we have to take into account the
2560                          * offset between the two.
2561                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2562                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2563                          */
2564                         int rate = local->hw.wiphy->bands[rx_status->band]->
2565                                         bitrates[rx_status->rate_idx].bitrate;
2566                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2567                 } else if (local && local->ops && local->ops->get_tsf)
2568                         /* second best option: get current TSF */
2569                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2570                 else
2571                         /* can't merge without knowing the TSF */
2572                         rx_timestamp = -1LLU;
2573 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2574                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2575                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2576                        print_mac(mac, mgmt->sa),
2577                        print_mac(mac2, mgmt->bssid),
2578                        (unsigned long long)rx_timestamp,
2579                        (unsigned long long)beacon_timestamp,
2580                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2581                        jiffies);
2582 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2583                 if (beacon_timestamp > rx_timestamp) {
2584 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2585                         if (net_ratelimit())
2586 #endif
2587                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2588                                        "local TSF - IBSS merge with BSSID %s\n",
2589                                        dev->name, print_mac(mac, mgmt->bssid));
2590                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2591                         rcu_read_lock();
2592                         ieee80211_ibss_add_sta(dev, NULL,
2593                                                mgmt->bssid, mgmt->sa);
2594                         rcu_read_unlock();
2595                 }
2596         }
2597
2598         ieee80211_rx_bss_put(dev, bss);
2599 }
2600
2601
2602 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2603                                          struct ieee80211_mgmt *mgmt,
2604                                          size_t len,
2605                                          struct ieee80211_rx_status *rx_status)
2606 {
2607         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2608 }
2609
2610
2611 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2612                                      struct ieee80211_mgmt *mgmt,
2613                                      size_t len,
2614                                      struct ieee80211_rx_status *rx_status)
2615 {
2616         struct ieee80211_sub_if_data *sdata;
2617         struct ieee80211_if_sta *ifsta;
2618         size_t baselen;
2619         struct ieee802_11_elems elems;
2620         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2621         struct ieee80211_conf *conf = &local->hw.conf;
2622         u32 changed = 0;
2623
2624         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2625
2626         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2627         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2628                 return;
2629         ifsta = &sdata->u.sta;
2630
2631         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2632             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2633                 return;
2634
2635         /* Process beacon from the current BSS */
2636         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2637         if (baselen > len)
2638                 return;
2639
2640         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2641
2642         if (elems.erp_info && elems.erp_info_len >= 1)
2643                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2644
2645         if (elems.ht_cap_elem && elems.ht_info_elem &&
2646             elems.wmm_param && local->ops->conf_ht &&
2647             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2648                 struct ieee80211_ht_bss_info bss_info;
2649
2650                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2651                                 (struct ieee80211_ht_addt_info *)
2652                                 elems.ht_info_elem, &bss_info);
2653                 /* check if AP changed bss inforamation */
2654                 if ((conf->ht_bss_conf.primary_channel !=
2655                      bss_info.primary_channel) ||
2656                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2657                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2658                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2659                                                 &bss_info);
2660         }
2661
2662         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2663                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2664                                          elems.wmm_param_len);
2665         }
2666
2667         ieee80211_bss_info_change_notify(sdata, changed);
2668 }
2669
2670
2671 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2672                                         struct ieee80211_if_sta *ifsta,
2673                                         struct ieee80211_mgmt *mgmt,
2674                                         size_t len,
2675                                         struct ieee80211_rx_status *rx_status)
2676 {
2677         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2678         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2679         int tx_last_beacon;
2680         struct sk_buff *skb;
2681         struct ieee80211_mgmt *resp;
2682         u8 *pos, *end;
2683         DECLARE_MAC_BUF(mac);
2684 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2685         DECLARE_MAC_BUF(mac2);
2686         DECLARE_MAC_BUF(mac3);
2687 #endif
2688
2689         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2690             ifsta->state != IEEE80211_IBSS_JOINED ||
2691             len < 24 + 2 || !ifsta->probe_resp)
2692                 return;
2693
2694         if (local->ops->tx_last_beacon)
2695                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2696         else
2697                 tx_last_beacon = 1;
2698
2699 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2700         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2701                "%s (tx_last_beacon=%d)\n",
2702                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2703                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2704 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2705
2706         if (!tx_last_beacon)
2707                 return;
2708
2709         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2710             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2711                 return;
2712
2713         end = ((u8 *) mgmt) + len;
2714         pos = mgmt->u.probe_req.variable;
2715         if (pos[0] != WLAN_EID_SSID ||
2716             pos + 2 + pos[1] > end) {
2717                 if (net_ratelimit()) {
2718                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2719                                "from %s\n",
2720                                dev->name, print_mac(mac, mgmt->sa));
2721                 }
2722                 return;
2723         }
2724         if (pos[1] != 0 &&
2725             (pos[1] != ifsta->ssid_len ||
2726              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2727                 /* Ignore ProbeReq for foreign SSID */
2728                 return;
2729         }
2730
2731         /* Reply with ProbeResp */
2732         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2733         if (!skb)
2734                 return;
2735
2736         resp = (struct ieee80211_mgmt *) skb->data;
2737         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2738 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2739         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2740                dev->name, print_mac(mac, resp->da));
2741 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2742         ieee80211_sta_tx(dev, skb, 0);
2743 }
2744
2745 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2746                                      struct ieee80211_if_sta *ifsta,
2747                                      struct ieee80211_mgmt *mgmt,
2748                                      size_t len,
2749                                      struct ieee80211_rx_status *rx_status)
2750 {
2751         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2752
2753         if (len < IEEE80211_MIN_ACTION_SIZE)
2754                 return;
2755
2756         switch (mgmt->u.action.category) {
2757         case WLAN_CATEGORY_BACK:
2758                 switch (mgmt->u.action.u.addba_req.action_code) {
2759                 case WLAN_ACTION_ADDBA_REQ:
2760                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2761                                    sizeof(mgmt->u.action.u.addba_req)))
2762                                 break;
2763                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2764                         break;
2765                 case WLAN_ACTION_ADDBA_RESP:
2766                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2767                                    sizeof(mgmt->u.action.u.addba_resp)))
2768                                 break;
2769                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2770                         break;
2771                 case WLAN_ACTION_DELBA:
2772                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2773                                    sizeof(mgmt->u.action.u.delba)))
2774                                 break;
2775                         ieee80211_sta_process_delba(dev, mgmt, len);
2776                         break;
2777                 default:
2778                         if (net_ratelimit())
2779                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2780                                         dev->name);
2781                         break;
2782                 }
2783                 break;
2784         case PLINK_CATEGORY:
2785                 if (ieee80211_vif_is_mesh(&sdata->vif))
2786                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2787                 break;
2788         case MESH_PATH_SEL_CATEGORY:
2789                 if (ieee80211_vif_is_mesh(&sdata->vif))
2790                         mesh_rx_path_sel_frame(dev, mgmt, len);
2791                 break;
2792         default:
2793                 if (net_ratelimit())
2794                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
2795                         "category=%d\n", dev->name, mgmt->u.action.category);
2796                 break;
2797         }
2798 }
2799
2800 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2801                            struct ieee80211_rx_status *rx_status)
2802 {
2803         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2804         struct ieee80211_sub_if_data *sdata;
2805         struct ieee80211_if_sta *ifsta;
2806         struct ieee80211_mgmt *mgmt;
2807         u16 fc;
2808
2809         if (skb->len < 24)
2810                 goto fail;
2811
2812         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2813         ifsta = &sdata->u.sta;
2814
2815         mgmt = (struct ieee80211_mgmt *) skb->data;
2816         fc = le16_to_cpu(mgmt->frame_control);
2817
2818         switch (fc & IEEE80211_FCTL_STYPE) {
2819         case IEEE80211_STYPE_PROBE_REQ:
2820         case IEEE80211_STYPE_PROBE_RESP:
2821         case IEEE80211_STYPE_BEACON:
2822         case IEEE80211_STYPE_ACTION:
2823                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2824         case IEEE80211_STYPE_AUTH:
2825         case IEEE80211_STYPE_ASSOC_RESP:
2826         case IEEE80211_STYPE_REASSOC_RESP:
2827         case IEEE80211_STYPE_DEAUTH:
2828         case IEEE80211_STYPE_DISASSOC:
2829                 skb_queue_tail(&ifsta->skb_queue, skb);
2830                 queue_work(local->hw.workqueue, &ifsta->work);
2831                 return;
2832         default:
2833                 printk(KERN_DEBUG "%s: received unknown management frame - "
2834                        "stype=%d\n", dev->name,
2835                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2836                 break;
2837         }
2838
2839  fail:
2840         kfree_skb(skb);
2841 }
2842
2843
2844 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2845                                          struct sk_buff *skb)
2846 {
2847         struct ieee80211_rx_status *rx_status;
2848         struct ieee80211_sub_if_data *sdata;
2849         struct ieee80211_if_sta *ifsta;
2850         struct ieee80211_mgmt *mgmt;
2851         u16 fc;
2852
2853         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2854         ifsta = &sdata->u.sta;
2855
2856         rx_status = (struct ieee80211_rx_status *) skb->cb;
2857         mgmt = (struct ieee80211_mgmt *) skb->data;
2858         fc = le16_to_cpu(mgmt->frame_control);
2859
2860         switch (fc & IEEE80211_FCTL_STYPE) {
2861         case IEEE80211_STYPE_PROBE_REQ:
2862                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2863                                             rx_status);
2864                 break;
2865         case IEEE80211_STYPE_PROBE_RESP:
2866                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2867                 break;
2868         case IEEE80211_STYPE_BEACON:
2869                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2870                 break;
2871         case IEEE80211_STYPE_AUTH:
2872                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2873                 break;
2874         case IEEE80211_STYPE_ASSOC_RESP:
2875                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2876                 break;
2877         case IEEE80211_STYPE_REASSOC_RESP:
2878                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2879                 break;
2880         case IEEE80211_STYPE_DEAUTH:
2881                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2882                 break;
2883         case IEEE80211_STYPE_DISASSOC:
2884                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2885                 break;
2886         case IEEE80211_STYPE_ACTION:
2887                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
2888                 break;
2889         }
2890
2891         kfree_skb(skb);
2892 }
2893
2894
2895 ieee80211_rx_result
2896 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2897                       struct ieee80211_rx_status *rx_status)
2898 {
2899         struct ieee80211_mgmt *mgmt;
2900         u16 fc;
2901
2902         if (skb->len < 2)
2903                 return RX_DROP_UNUSABLE;
2904
2905         mgmt = (struct ieee80211_mgmt *) skb->data;
2906         fc = le16_to_cpu(mgmt->frame_control);
2907
2908         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2909                 return RX_CONTINUE;
2910
2911         if (skb->len < 24)
2912                 return RX_DROP_MONITOR;
2913
2914         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2915                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2916                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2917                                                      skb->len, rx_status);
2918                         dev_kfree_skb(skb);
2919                         return RX_QUEUED;
2920                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2921                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2922                                                  rx_status);
2923                         dev_kfree_skb(skb);
2924                         return RX_QUEUED;
2925                 }
2926         }
2927         return RX_CONTINUE;
2928 }
2929
2930
2931 static int ieee80211_sta_active_ibss(struct net_device *dev)
2932 {
2933         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2934         int active = 0;
2935         struct sta_info *sta;
2936         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2937
2938         rcu_read_lock();
2939
2940         list_for_each_entry_rcu(sta, &local->sta_list, list) {
2941                 if (sta->sdata == sdata &&
2942                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2943                                jiffies)) {
2944                         active++;
2945                         break;
2946                 }
2947         }
2948
2949         rcu_read_unlock();
2950
2951         return active;
2952 }
2953
2954
2955 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
2956 {
2957         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2958         struct sta_info *sta, *tmp;
2959         LIST_HEAD(tmp_list);
2960         DECLARE_MAC_BUF(mac);
2961         unsigned long flags;
2962
2963         spin_lock_irqsave(&local->sta_lock, flags);
2964         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2965                 if (time_after(jiffies, sta->last_rx + exp_time)) {
2966                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2967                                dev->name, print_mac(mac, sta->addr));
2968                         sta_info_unlink(&sta);
2969                         if (sta)
2970                                 list_add(&sta->list, &tmp_list);
2971                 }
2972         spin_unlock_irqrestore(&local->sta_lock, flags);
2973
2974         synchronize_rcu();
2975
2976         rtnl_lock();
2977         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
2978                 sta_info_destroy(sta);
2979         rtnl_unlock();
2980 }
2981
2982
2983 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2984                                      struct ieee80211_if_sta *ifsta)
2985 {
2986         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2987
2988         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
2989         if (ieee80211_sta_active_ibss(dev))
2990                 return;
2991
2992         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2993                "IBSS networks with same SSID (merge)\n", dev->name);
2994         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2995 }
2996
2997
2998 #ifdef CONFIG_MAC80211_MESH
2999 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3000                            struct ieee80211_if_sta *ifsta)
3001 {
3002         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3003         bool free_plinks;
3004
3005         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3006         mesh_path_expire(dev);
3007
3008         free_plinks = mesh_plink_availables(sdata);
3009         if (free_plinks != sdata->u.sta.accepting_plinks)
3010                 ieee80211_if_config_beacon(dev);
3011
3012         mod_timer(&ifsta->timer, jiffies +
3013                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3014 }
3015
3016
3017 void ieee80211_start_mesh(struct net_device *dev)
3018 {
3019         struct ieee80211_if_sta *ifsta;
3020         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3021         ifsta = &sdata->u.sta;
3022         ifsta->state = IEEE80211_MESH_UP;
3023         ieee80211_sta_timer((unsigned long)sdata);
3024 }
3025 #endif
3026
3027
3028 void ieee80211_sta_timer(unsigned long data)
3029 {
3030         struct ieee80211_sub_if_data *sdata =
3031                 (struct ieee80211_sub_if_data *) data;
3032         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3033         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3034
3035         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3036         queue_work(local->hw.workqueue, &ifsta->work);
3037 }
3038
3039 void ieee80211_sta_work(struct work_struct *work)
3040 {
3041         struct ieee80211_sub_if_data *sdata =
3042                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3043         struct net_device *dev = sdata->dev;
3044         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3045         struct ieee80211_if_sta *ifsta;
3046         struct sk_buff *skb;
3047
3048         if (!netif_running(dev))
3049                 return;
3050
3051         if (local->sta_sw_scanning || local->sta_hw_scanning)
3052                 return;
3053
3054         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3055             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3056             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3057                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3058                        "(type=%d)\n", dev->name, sdata->vif.type);
3059                 return;
3060         }
3061         ifsta = &sdata->u.sta;
3062
3063         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3064                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3065
3066 #ifdef CONFIG_MAC80211_MESH
3067         if (ifsta->preq_queue_len &&
3068             time_after(jiffies,
3069                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3070                 mesh_path_start_discovery(dev);
3071 #endif
3072
3073         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3074             ifsta->state != IEEE80211_ASSOCIATE &&
3075             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3076                 if (ifsta->scan_ssid_len)
3077                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3078                 else
3079                         ieee80211_sta_start_scan(dev, NULL, 0);
3080                 return;
3081         }
3082
3083         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3084                 if (ieee80211_sta_config_auth(dev, ifsta))
3085                         return;
3086                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3087         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3088                 return;
3089
3090         switch (ifsta->state) {
3091         case IEEE80211_DISABLED:
3092                 break;
3093         case IEEE80211_AUTHENTICATE:
3094                 ieee80211_authenticate(dev, ifsta);
3095                 break;
3096         case IEEE80211_ASSOCIATE:
3097                 ieee80211_associate(dev, ifsta);
3098                 break;
3099         case IEEE80211_ASSOCIATED:
3100                 ieee80211_associated(dev, ifsta);
3101                 break;
3102         case IEEE80211_IBSS_SEARCH:
3103                 ieee80211_sta_find_ibss(dev, ifsta);
3104                 break;
3105         case IEEE80211_IBSS_JOINED:
3106                 ieee80211_sta_merge_ibss(dev, ifsta);
3107                 break;
3108 #ifdef CONFIG_MAC80211_MESH
3109         case IEEE80211_MESH_UP:
3110                 ieee80211_mesh_housekeeping(dev, ifsta);
3111                 break;
3112 #endif
3113         default:
3114                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3115                        ifsta->state);
3116                 break;
3117         }
3118
3119         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3120                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3121                        "mixed-cell disabled - disassociate\n", dev->name);
3122
3123                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3124                 ieee80211_set_disassoc(dev, ifsta, 0);
3125         }
3126 }
3127
3128
3129 static void ieee80211_sta_reset_auth(struct net_device *dev,
3130                                      struct ieee80211_if_sta *ifsta)
3131 {
3132         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3133
3134         if (local->ops->reset_tsf) {
3135                 /* Reset own TSF to allow time synchronization work. */
3136                 local->ops->reset_tsf(local_to_hw(local));
3137         }
3138
3139         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3140
3141
3142         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3143                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3144         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3145                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3146         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3147                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3148         else
3149                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3150         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3151                ifsta->auth_alg);
3152         ifsta->auth_transaction = -1;
3153         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3154         ifsta->auth_tries = ifsta->assoc_tries = 0;
3155         netif_carrier_off(dev);
3156 }
3157
3158
3159 void ieee80211_sta_req_auth(struct net_device *dev,
3160                             struct ieee80211_if_sta *ifsta)
3161 {
3162         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3163         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3164
3165         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3166                 return;
3167
3168         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3169                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3170             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3171                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3172                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3173                 queue_work(local->hw.workqueue, &ifsta->work);
3174         }
3175 }
3176
3177 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3178                                     const char *ssid, int ssid_len)
3179 {
3180         int tmp, hidden_ssid;
3181
3182         if (ssid_len == ifsta->ssid_len &&
3183             !memcmp(ifsta->ssid, ssid, ssid_len))
3184                 return 1;
3185
3186         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3187                 return 0;
3188
3189         hidden_ssid = 1;
3190         tmp = ssid_len;
3191         while (tmp--) {
3192                 if (ssid[tmp] != '\0') {
3193                         hidden_ssid = 0;
3194                         break;
3195                 }
3196         }
3197
3198         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3199                 return 1;
3200
3201         if (ssid_len == 1 && ssid[0] == ' ')
3202                 return 1;
3203
3204         return 0;
3205 }
3206
3207 static int ieee80211_sta_config_auth(struct net_device *dev,
3208                                      struct ieee80211_if_sta *ifsta)
3209 {
3210         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3211         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3212         struct ieee80211_sta_bss *bss, *selected = NULL;
3213         int top_rssi = 0, freq;
3214
3215         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3216             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3217                 ifsta->state = IEEE80211_AUTHENTICATE;
3218                 ieee80211_sta_reset_auth(dev, ifsta);
3219                 return 0;
3220         }
3221
3222         spin_lock_bh(&local->sta_bss_lock);
3223         freq = local->oper_channel->center_freq;
3224         list_for_each_entry(bss, &local->sta_bss_list, list) {
3225                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3226                         continue;
3227
3228                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3229                     !!sdata->default_key)
3230                         continue;
3231
3232                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3233                     bss->freq != freq)
3234                         continue;
3235
3236                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3237                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3238                         continue;
3239
3240                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3241                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3242                         continue;
3243
3244                 if (!selected || top_rssi < bss->rssi) {
3245                         selected = bss;
3246                         top_rssi = bss->rssi;
3247                 }
3248         }
3249         if (selected)
3250                 atomic_inc(&selected->users);
3251         spin_unlock_bh(&local->sta_bss_lock);
3252
3253         if (selected) {
3254                 ieee80211_set_freq(local, selected->freq);
3255                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3256                         ieee80211_sta_set_ssid(dev, selected->ssid,
3257                                                selected->ssid_len);
3258                 ieee80211_sta_set_bssid(dev, selected->bssid);
3259                 ieee80211_rx_bss_put(dev, selected);
3260                 ifsta->state = IEEE80211_AUTHENTICATE;
3261                 ieee80211_sta_reset_auth(dev, ifsta);
3262                 return 0;
3263         } else {
3264                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3265                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3266                                 ieee80211_sta_start_scan(dev, NULL, 0);
3267                         else
3268                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3269                                                          ifsta->ssid_len);
3270                         ifsta->state = IEEE80211_AUTHENTICATE;
3271                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3272                 } else
3273                         ifsta->state = IEEE80211_DISABLED;
3274         }
3275         return -1;
3276 }
3277
3278
3279 static int ieee80211_sta_create_ibss(struct net_device *dev,
3280                                      struct ieee80211_if_sta *ifsta)
3281 {
3282         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3283         struct ieee80211_sta_bss *bss;
3284         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3285         struct ieee80211_supported_band *sband;
3286         u8 bssid[ETH_ALEN], *pos;
3287         int i;
3288         DECLARE_MAC_BUF(mac);
3289
3290 #if 0
3291         /* Easier testing, use fixed BSSID. */
3292         memset(bssid, 0xfe, ETH_ALEN);
3293 #else
3294         /* Generate random, not broadcast, locally administered BSSID. Mix in
3295          * own MAC address to make sure that devices that do not have proper
3296          * random number generator get different BSSID. */
3297         get_random_bytes(bssid, ETH_ALEN);
3298         for (i = 0; i < ETH_ALEN; i++)
3299                 bssid[i] ^= dev->dev_addr[i];
3300         bssid[0] &= ~0x01;
3301         bssid[0] |= 0x02;
3302 #endif
3303
3304         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3305                dev->name, print_mac(mac, bssid));
3306
3307         bss = ieee80211_rx_bss_add(dev, bssid,
3308                                    local->hw.conf.channel->center_freq,
3309                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3310         if (!bss)
3311                 return -ENOMEM;
3312
3313         bss->band = local->hw.conf.channel->band;
3314         sband = local->hw.wiphy->bands[bss->band];
3315
3316         if (local->hw.conf.beacon_int == 0)
3317                 local->hw.conf.beacon_int = 10000;
3318         bss->beacon_int = local->hw.conf.beacon_int;
3319         bss->last_update = jiffies;
3320         bss->capability = WLAN_CAPABILITY_IBSS;
3321         if (sdata->default_key) {
3322                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3323         } else
3324                 sdata->drop_unencrypted = 0;
3325         bss->supp_rates_len = sband->n_bitrates;
3326         pos = bss->supp_rates;
3327         for (i = 0; i < sband->n_bitrates; i++) {
3328                 int rate = sband->bitrates[i].bitrate;
3329                 *pos++ = (u8) (rate / 5);
3330         }
3331
3332         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3333 }
3334
3335
3336 static int ieee80211_sta_find_ibss(struct net_device *dev,
3337                                    struct ieee80211_if_sta *ifsta)
3338 {
3339         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3340         struct ieee80211_sta_bss *bss;
3341         int found = 0;
3342         u8 bssid[ETH_ALEN];
3343         int active_ibss;
3344         DECLARE_MAC_BUF(mac);
3345         DECLARE_MAC_BUF(mac2);
3346
3347         if (ifsta->ssid_len == 0)
3348                 return -EINVAL;
3349
3350         active_ibss = ieee80211_sta_active_ibss(dev);
3351 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3352         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3353                dev->name, active_ibss);
3354 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3355         spin_lock_bh(&local->sta_bss_lock);
3356         list_for_each_entry(bss, &local->sta_bss_list, list) {
3357                 if (ifsta->ssid_len != bss->ssid_len ||
3358                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3359                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3360                         continue;
3361 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3362                 printk(KERN_DEBUG "   bssid=%s found\n",
3363                        print_mac(mac, bss->bssid));
3364 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3365                 memcpy(bssid, bss->bssid, ETH_ALEN);
3366                 found = 1;
3367                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3368                         break;
3369         }
3370         spin_unlock_bh(&local->sta_bss_lock);
3371
3372 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3373         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3374                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3375 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3376         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3377             (bss = ieee80211_rx_bss_get(dev, bssid,
3378                                         local->hw.conf.channel->center_freq,
3379                                         ifsta->ssid, ifsta->ssid_len))) {
3380                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3381                        " based on configured SSID\n",
3382                        dev->name, print_mac(mac, bssid));
3383                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3384         }
3385 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3386         printk(KERN_DEBUG "   did not try to join ibss\n");
3387 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3388
3389         /* Selected IBSS not found in current scan results - try to scan */
3390         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3391             !ieee80211_sta_active_ibss(dev)) {
3392                 mod_timer(&ifsta->timer, jiffies +
3393                                       IEEE80211_IBSS_MERGE_INTERVAL);
3394         } else if (time_after(jiffies, local->last_scan_completed +
3395                               IEEE80211_SCAN_INTERVAL)) {
3396                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3397                        "join\n", dev->name);
3398                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3399                                               ifsta->ssid_len);
3400         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3401                 int interval = IEEE80211_SCAN_INTERVAL;
3402
3403                 if (time_after(jiffies, ifsta->ibss_join_req +
3404                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3405                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3406                             (!(local->oper_channel->flags &
3407                                         IEEE80211_CHAN_NO_IBSS)))
3408                                 return ieee80211_sta_create_ibss(dev, ifsta);
3409                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3410                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3411                                        " %d MHz\n", dev->name,
3412                                        local->hw.conf.channel->center_freq);
3413                         }
3414
3415                         /* No IBSS found - decrease scan interval and continue
3416                          * scanning. */
3417                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3418                 }
3419
3420                 ifsta->state = IEEE80211_IBSS_SEARCH;
3421                 mod_timer(&ifsta->timer, jiffies + interval);
3422                 return 0;
3423         }
3424
3425         return 0;
3426 }
3427
3428
3429 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3430 {
3431         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3432         struct ieee80211_if_sta *ifsta;
3433         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3434
3435         if (len > IEEE80211_MAX_SSID_LEN)
3436                 return -EINVAL;
3437
3438         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3439          * not defined. */
3440         if (local->ops->conf_tx) {
3441                 struct ieee80211_tx_queue_params qparam;
3442                 int i;
3443
3444                 memset(&qparam, 0, sizeof(qparam));
3445
3446                 qparam.aifs = 2;
3447
3448                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3449                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3450                         qparam.cw_min = 31;
3451                 else
3452                         qparam.cw_min = 15;
3453
3454                 qparam.cw_max = 1023;
3455                 qparam.txop = 0;
3456
3457                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3458                         local->ops->conf_tx(local_to_hw(local),
3459                                            i + IEEE80211_TX_QUEUE_DATA0,
3460                                            &qparam);
3461
3462                 /* IBSS uses different parameters for Beacon sending */
3463                 qparam.cw_min++;
3464                 qparam.cw_min *= 2;
3465                 qparam.cw_min--;
3466                 local->ops->conf_tx(local_to_hw(local),
3467                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
3468         }
3469
3470         ifsta = &sdata->u.sta;
3471
3472         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3473                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3474         memcpy(ifsta->ssid, ssid, len);
3475         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3476         ifsta->ssid_len = len;
3477
3478         if (len)
3479                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3480         else
3481                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3482         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3483             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3484                 ifsta->ibss_join_req = jiffies;
3485                 ifsta->state = IEEE80211_IBSS_SEARCH;
3486                 return ieee80211_sta_find_ibss(dev, ifsta);
3487         }
3488         return 0;
3489 }
3490
3491
3492 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3493 {
3494         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3495         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3496         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3497         *len = ifsta->ssid_len;
3498         return 0;
3499 }
3500
3501
3502 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3503 {
3504         struct ieee80211_sub_if_data *sdata;
3505         struct ieee80211_if_sta *ifsta;
3506         int res;
3507
3508         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3509         ifsta = &sdata->u.sta;
3510
3511         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3512                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3513                 res = ieee80211_if_config(dev);
3514                 if (res) {
3515                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3516                                "the low-level driver\n", dev->name);
3517                         return res;
3518                 }
3519         }
3520
3521         if (is_valid_ether_addr(bssid))
3522                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3523         else
3524                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3525
3526         return 0;
3527 }
3528
3529
3530 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3531                                     struct ieee80211_sub_if_data *sdata,
3532                                     int powersave)
3533 {
3534         struct sk_buff *skb;
3535         struct ieee80211_hdr *nullfunc;
3536         u16 fc;
3537
3538         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3539         if (!skb) {
3540                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3541                        "frame\n", sdata->dev->name);
3542                 return;
3543         }
3544         skb_reserve(skb, local->hw.extra_tx_headroom);
3545
3546         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3547         memset(nullfunc, 0, 24);
3548         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3549              IEEE80211_FCTL_TODS;
3550         if (powersave)
3551                 fc |= IEEE80211_FCTL_PM;
3552         nullfunc->frame_control = cpu_to_le16(fc);
3553         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3554         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3555         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3556
3557         ieee80211_sta_tx(sdata->dev, skb, 0);
3558 }
3559
3560
3561 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3562 {
3563         struct ieee80211_local *local = hw_to_local(hw);
3564         struct net_device *dev = local->scan_dev;
3565         struct ieee80211_sub_if_data *sdata;
3566         union iwreq_data wrqu;
3567
3568         local->last_scan_completed = jiffies;
3569         memset(&wrqu, 0, sizeof(wrqu));
3570         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3571
3572         if (local->sta_hw_scanning) {
3573                 local->sta_hw_scanning = 0;
3574                 goto done;
3575         }
3576
3577         local->sta_sw_scanning = 0;
3578         if (ieee80211_hw_config(local))
3579                 printk(KERN_DEBUG "%s: failed to restore operational "
3580                        "channel after scan\n", dev->name);
3581
3582
3583         netif_tx_lock_bh(local->mdev);
3584         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3585         local->ops->configure_filter(local_to_hw(local),
3586                                      FIF_BCN_PRBRESP_PROMISC,
3587                                      &local->filter_flags,
3588                                      local->mdev->mc_count,
3589                                      local->mdev->mc_list);
3590
3591         netif_tx_unlock_bh(local->mdev);
3592
3593         rcu_read_lock();
3594         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3595
3596                 /* No need to wake the master device. */
3597                 if (sdata->dev == local->mdev)
3598                         continue;
3599
3600                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3601                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3602                                 ieee80211_send_nullfunc(local, sdata, 0);
3603                         ieee80211_sta_timer((unsigned long)sdata);
3604                 }
3605
3606                 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT)
3607                         ieee80211_sta_timer((unsigned long)sdata);
3608
3609                 netif_wake_queue(sdata->dev);
3610         }
3611         rcu_read_unlock();
3612
3613 done:
3614         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3615         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3616                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3617                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3618                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3619                     !ieee80211_sta_active_ibss(dev)))
3620                         ieee80211_sta_find_ibss(dev, ifsta);
3621         }
3622 }
3623 EXPORT_SYMBOL(ieee80211_scan_completed);
3624
3625 void ieee80211_sta_scan_work(struct work_struct *work)
3626 {
3627         struct ieee80211_local *local =
3628                 container_of(work, struct ieee80211_local, scan_work.work);
3629         struct net_device *dev = local->scan_dev;
3630         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3631         struct ieee80211_supported_band *sband;
3632         struct ieee80211_channel *chan;
3633         int skip;
3634         unsigned long next_delay = 0;
3635
3636         if (!local->sta_sw_scanning)
3637                 return;
3638
3639         switch (local->scan_state) {
3640         case SCAN_SET_CHANNEL:
3641                 /*
3642                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3643                  * after we successfully scanned the last channel of the last
3644                  * band (and the last band is supported by the hw)
3645                  */
3646                 if (local->scan_band < IEEE80211_NUM_BANDS)
3647                         sband = local->hw.wiphy->bands[local->scan_band];
3648                 else
3649                         sband = NULL;
3650
3651                 /*
3652                  * If we are at an unsupported band and have more bands
3653                  * left to scan, advance to the next supported one.
3654                  */
3655                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3656                         local->scan_band++;
3657                         sband = local->hw.wiphy->bands[local->scan_band];
3658                         local->scan_channel_idx = 0;
3659                 }
3660
3661                 /* if no more bands/channels left, complete scan */
3662                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3663                         ieee80211_scan_completed(local_to_hw(local));
3664                         return;
3665                 }
3666                 skip = 0;
3667                 chan = &sband->channels[local->scan_channel_idx];
3668
3669                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3670                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3671                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3672                         skip = 1;
3673
3674                 if (!skip) {
3675                         local->scan_channel = chan;
3676                         if (ieee80211_hw_config(local)) {
3677                                 printk(KERN_DEBUG "%s: failed to set freq to "
3678                                        "%d MHz for scan\n", dev->name,
3679                                        chan->center_freq);
3680                                 skip = 1;
3681                         }
3682                 }
3683
3684                 /* advance state machine to next channel/band */
3685                 local->scan_channel_idx++;
3686                 if (local->scan_channel_idx >= sband->n_channels) {
3687                         /*
3688                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3689                          * we'll catch that case above and complete the scan
3690                          * if that is the case.
3691                          */
3692                         local->scan_band++;
3693                         local->scan_channel_idx = 0;
3694                 }
3695
3696                 if (skip)
3697                         break;
3698
3699                 next_delay = IEEE80211_PROBE_DELAY +
3700                              usecs_to_jiffies(local->hw.channel_change_time);
3701                 local->scan_state = SCAN_SEND_PROBE;
3702                 break;
3703         case SCAN_SEND_PROBE:
3704                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3705                 local->scan_state = SCAN_SET_CHANNEL;
3706
3707                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3708                         break;
3709                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3710                                          local->scan_ssid_len);
3711                 next_delay = IEEE80211_CHANNEL_TIME;
3712                 break;
3713         }
3714
3715         if (local->sta_sw_scanning)
3716                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3717                                    next_delay);
3718 }
3719
3720
3721 static int ieee80211_sta_start_scan(struct net_device *dev,
3722                                     u8 *ssid, size_t ssid_len)
3723 {
3724         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3725         struct ieee80211_sub_if_data *sdata;
3726
3727         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3728                 return -EINVAL;
3729
3730         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3731          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3732          * BSSID: MACAddress
3733          * SSID
3734          * ScanType: ACTIVE, PASSIVE
3735          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3736          *    a Probe frame during active scanning
3737          * ChannelList
3738          * MinChannelTime (>= ProbeDelay), in TU
3739          * MaxChannelTime: (>= MinChannelTime), in TU
3740          */
3741
3742          /* MLME-SCAN.confirm
3743           * BSSDescriptionSet
3744           * ResultCode: SUCCESS, INVALID_PARAMETERS
3745          */
3746
3747         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3748                 if (local->scan_dev == dev)
3749                         return 0;
3750                 return -EBUSY;
3751         }
3752
3753         if (local->ops->hw_scan) {
3754                 int rc = local->ops->hw_scan(local_to_hw(local),
3755                                              ssid, ssid_len);
3756                 if (!rc) {
3757                         local->sta_hw_scanning = 1;
3758                         local->scan_dev = dev;
3759                 }
3760                 return rc;
3761         }
3762
3763         local->sta_sw_scanning = 1;
3764
3765         rcu_read_lock();
3766         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3767
3768                 /* Don't stop the master interface, otherwise we can't transmit
3769                  * probes! */
3770                 if (sdata->dev == local->mdev)
3771                         continue;
3772
3773                 netif_stop_queue(sdata->dev);
3774                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3775                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3776                         ieee80211_send_nullfunc(local, sdata, 1);
3777         }
3778         rcu_read_unlock();
3779
3780         if (ssid) {
3781                 local->scan_ssid_len = ssid_len;
3782                 memcpy(local->scan_ssid, ssid, ssid_len);
3783         } else
3784                 local->scan_ssid_len = 0;
3785         local->scan_state = SCAN_SET_CHANNEL;
3786         local->scan_channel_idx = 0;
3787         local->scan_band = IEEE80211_BAND_2GHZ;
3788         local->scan_dev = dev;
3789
3790         netif_tx_lock_bh(local->mdev);
3791         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3792         local->ops->configure_filter(local_to_hw(local),
3793                                      FIF_BCN_PRBRESP_PROMISC,
3794                                      &local->filter_flags,
3795                                      local->mdev->mc_count,
3796                                      local->mdev->mc_list);
3797         netif_tx_unlock_bh(local->mdev);
3798
3799         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3800         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3801                            IEEE80211_CHANNEL_TIME);
3802
3803         return 0;
3804 }
3805
3806
3807 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3808 {
3809         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3810         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3811         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3812
3813         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3814                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3815
3816         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3817                 if (local->scan_dev == dev)
3818                         return 0;
3819                 return -EBUSY;
3820         }
3821
3822         ifsta->scan_ssid_len = ssid_len;
3823         if (ssid_len)
3824                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3825         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3826         queue_work(local->hw.workqueue, &ifsta->work);
3827         return 0;
3828 }
3829
3830 static char *
3831 ieee80211_sta_scan_result(struct net_device *dev,
3832                           struct ieee80211_sta_bss *bss,
3833                           char *current_ev, char *end_buf)
3834 {
3835         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3836         struct iw_event iwe;
3837
3838         if (time_after(jiffies,
3839                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3840                 return current_ev;
3841
3842         memset(&iwe, 0, sizeof(iwe));
3843         iwe.cmd = SIOCGIWAP;
3844         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3845         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3846         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3847                                           IW_EV_ADDR_LEN);
3848
3849         memset(&iwe, 0, sizeof(iwe));
3850         iwe.cmd = SIOCGIWESSID;
3851         if (bss_mesh_cfg(bss)) {
3852                 iwe.u.data.length = bss_mesh_id_len(bss);
3853                 iwe.u.data.flags = 1;
3854                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3855                                                   bss_mesh_id(bss));
3856         } else {
3857                 iwe.u.data.length = bss->ssid_len;
3858                 iwe.u.data.flags = 1;
3859                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3860                                                   bss->ssid);
3861         }
3862
3863         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS
3864             || bss_mesh_cfg(bss))) {
3865                 memset(&iwe, 0, sizeof(iwe));
3866                 iwe.cmd = SIOCGIWMODE;
3867                 if (bss_mesh_cfg(bss))
3868                         iwe.u.mode = IW_MODE_MESH;
3869                 else if (bss->capability & WLAN_CAPABILITY_ESS)
3870                         iwe.u.mode = IW_MODE_MASTER;
3871                 else
3872                         iwe.u.mode = IW_MODE_ADHOC;
3873                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3874                                                   IW_EV_UINT_LEN);
3875         }
3876
3877         memset(&iwe, 0, sizeof(iwe));
3878         iwe.cmd = SIOCGIWFREQ;
3879         iwe.u.freq.m = bss->freq;
3880         iwe.u.freq.e = 6;
3881         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3882                                           IW_EV_FREQ_LEN);
3883
3884         memset(&iwe, 0, sizeof(iwe));
3885         iwe.cmd = SIOCGIWFREQ;
3886         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3887         iwe.u.freq.e = 0;
3888         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3889                                           IW_EV_FREQ_LEN);
3890
3891         memset(&iwe, 0, sizeof(iwe));
3892         iwe.cmd = IWEVQUAL;
3893         iwe.u.qual.qual = bss->signal;
3894         iwe.u.qual.level = bss->rssi;
3895         iwe.u.qual.noise = bss->noise;
3896         iwe.u.qual.updated = local->wstats_flags;
3897         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3898                                           IW_EV_QUAL_LEN);
3899
3900         memset(&iwe, 0, sizeof(iwe));
3901         iwe.cmd = SIOCGIWENCODE;
3902         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3903                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3904         else
3905                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3906         iwe.u.data.length = 0;
3907         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3908
3909         if (bss && bss->wpa_ie) {
3910                 memset(&iwe, 0, sizeof(iwe));
3911                 iwe.cmd = IWEVGENIE;
3912                 iwe.u.data.length = bss->wpa_ie_len;
3913                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3914                                                   bss->wpa_ie);
3915         }
3916
3917         if (bss && bss->rsn_ie) {
3918                 memset(&iwe, 0, sizeof(iwe));
3919                 iwe.cmd = IWEVGENIE;
3920                 iwe.u.data.length = bss->rsn_ie_len;
3921                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3922                                                   bss->rsn_ie);
3923         }
3924
3925         if (bss && bss->supp_rates_len > 0) {
3926                 /* display all supported rates in readable format */
3927                 char *p = current_ev + IW_EV_LCP_LEN;
3928                 int i;
3929
3930                 memset(&iwe, 0, sizeof(iwe));
3931                 iwe.cmd = SIOCGIWRATE;
3932                 /* Those two flags are ignored... */
3933                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3934
3935                 for (i = 0; i < bss->supp_rates_len; i++) {
3936                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3937                                                         0x7f) * 500000);
3938                         p = iwe_stream_add_value(current_ev, p,
3939                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3940                 }
3941                 current_ev = p;
3942         }
3943
3944         if (bss) {
3945                 char *buf;
3946                 buf = kmalloc(30, GFP_ATOMIC);
3947                 if (buf) {
3948                         memset(&iwe, 0, sizeof(iwe));
3949                         iwe.cmd = IWEVCUSTOM;
3950                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3951                         iwe.u.data.length = strlen(buf);
3952                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3953                                                           &iwe, buf);
3954                         kfree(buf);
3955                 }
3956         }
3957
3958         if (bss_mesh_cfg(bss)) {
3959                 char *buf;
3960                 u8 *cfg = bss_mesh_cfg(bss);
3961                 buf = kmalloc(200, GFP_ATOMIC);
3962                 if (buf) {
3963                         memset(&iwe, 0, sizeof(iwe));
3964                         iwe.cmd = IWEVCUSTOM;
3965                         sprintf(buf, "Mesh network (version %d)\n"
3966                         "\t\t\tPath Selection Protocol ID: 0x%02X%02X%02X%02X\n"
3967                         "\t\t\tPath Selection Metric ID: 0x%02X%02X%02X%02X\n"
3968                         "\t\t\tCongestion Control Mode ID: 0x%02X%02X%02X%02X\n"
3969                         "\t\t\tChannel Precedence: 0x%02X%02X%02X%02X",
3970                         cfg[0], cfg[1], cfg[2], cfg[3], cfg[4], cfg[5], cfg[6],
3971                         cfg[7], cfg[8], cfg[9], cfg[10], cfg[11], cfg[12],
3972                         cfg[13], cfg[14], cfg[15], cfg[16]);
3973                         iwe.u.data.length = strlen(buf);
3974                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3975                                                           &iwe, buf);
3976                         kfree(buf);
3977                 }
3978         }
3979
3980         return current_ev;
3981 }
3982
3983
3984 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3985 {
3986         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3987         char *current_ev = buf;
3988         char *end_buf = buf + len;
3989         struct ieee80211_sta_bss *bss;
3990
3991         spin_lock_bh(&local->sta_bss_lock);
3992         list_for_each_entry(bss, &local->sta_bss_list, list) {
3993                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3994                         spin_unlock_bh(&local->sta_bss_lock);
3995                         return -E2BIG;
3996                 }
3997                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3998                                                        end_buf);
3999         }
4000         spin_unlock_bh(&local->sta_bss_lock);
4001         return current_ev - buf;
4002 }
4003
4004
4005 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4006 {
4007         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4008         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4009         kfree(ifsta->extra_ie);
4010         if (len == 0) {
4011                 ifsta->extra_ie = NULL;
4012                 ifsta->extra_ie_len = 0;
4013                 return 0;
4014         }
4015         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4016         if (!ifsta->extra_ie) {
4017                 ifsta->extra_ie_len = 0;
4018                 return -ENOMEM;
4019         }
4020         memcpy(ifsta->extra_ie, ie, len);
4021         ifsta->extra_ie_len = len;
4022         return 0;
4023 }
4024
4025
4026 /* must be called under RCU read lock */
4027 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4028                                          struct sk_buff *skb, u8 *bssid,
4029                                          u8 *addr)
4030 {
4031         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4032         struct sta_info *sta;
4033         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4034         DECLARE_MAC_BUF(mac);
4035
4036         /* TODO: Could consider removing the least recently used entry and
4037          * allow new one to be added. */
4038         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4039                 if (net_ratelimit()) {
4040                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4041                                "entry %s\n", dev->name, print_mac(mac, addr));
4042                 }
4043                 return NULL;
4044         }
4045
4046         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4047                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4048
4049         sta = sta_info_add(sdata, addr);
4050         if (IS_ERR(sta))
4051                 return NULL;
4052
4053         sta->flags |= WLAN_STA_AUTHORIZED;
4054
4055         sta->supp_rates[local->hw.conf.channel->band] =
4056                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4057
4058         rate_control_rate_init(sta, local);
4059
4060         return sta;
4061 }
4062
4063
4064 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4065 {
4066         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4067         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4068
4069         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4070                dev->name, reason);
4071
4072         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4073             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4074                 return -EINVAL;
4075
4076         ieee80211_send_deauth(dev, ifsta, reason);
4077         ieee80211_set_disassoc(dev, ifsta, 1);
4078         return 0;
4079 }
4080
4081
4082 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4083 {
4084         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4085         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4086
4087         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4088                dev->name, reason);
4089
4090         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4091                 return -EINVAL;
4092
4093         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4094                 return -1;
4095
4096         ieee80211_send_disassoc(dev, ifsta, reason);
4097         ieee80211_set_disassoc(dev, ifsta, 0);
4098         return 0;
4099 }