net/mac80211/ieee80211_sta.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <net/iw_handler.h>
  28 #include <asm/types.h>
  29
  30 #include <net/mac80211.h>
  31 #include "ieee80211_i.h"
  32 #include "ieee80211_rate.h"
  33 #include "ieee80211_led.h"
  34 #ifdef CONFIG_MAC80211_MESH
  35 #include "mesh.h"
  36 #endif
  37
  38 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  39 #define IEEE80211_AUTH_MAX_TRIES 3
  40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  41 #define IEEE80211_ASSOC_MAX_TRIES 3
  42 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  43 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  44 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  45 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  47 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  48 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  49
  50 #define IEEE80211_PROBE_DELAY (HZ / 33)
  51 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  52 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  53 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  54 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  55 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  56 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  57
  58 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  59
  60
  61 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  62
  63 #define ERP_INFO_USE_PROTECTION BIT(1)
  64
  65 /* mgmt header + 1 byte action code */
  66 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  67
  68 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  69 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  70 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  71 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  72 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  73
  74 /* next values represent the buffer size for A-MPDU frame.
  75  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  76 #define IEEE80211_MIN_AMPDU_BUF 0x8
  77 #define IEEE80211_MAX_AMPDU_BUF 0x40
  78
  79 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  80                                      u8 *ssid, size_t ssid_len);
  81 static struct ieee80211_sta_bss *
  82 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  83                      u8 *ssid, u8 ssid_len);
  84 static void ieee80211_rx_bss_put(struct net_device *dev,
  85                                  struct ieee80211_sta_bss *bss);
  86 static int ieee80211_sta_find_ibss(struct net_device *dev,
  87                                    struct ieee80211_if_sta *ifsta);
  88 static int ieee80211_sta_wep_configured(struct net_device *dev);
  89 static int ieee80211_sta_start_scan(struct net_device *dev,
  90                                     u8 *ssid, size_t ssid_len);
  91 static int ieee80211_sta_config_auth(struct net_device *dev,
  92                                      struct ieee80211_if_sta *ifsta);
  93
  94
  95 void ieee802_11_parse_elems(u8 *start, size_t len,
  96                             struct ieee802_11_elems *elems)
  97 {
  98         size_t left = len;
  99         u8 *pos = start;
 100
 101         memset(elems, 0, sizeof(*elems));
 102
 103         while (left >= 2) {
 104                 u8 id, elen;
 105
 106                 id = *pos++;
 107                 elen = *pos++;
 108                 left -= 2;
 109
 110                 if (elen > left)
 111                         return;
 112
 113                 switch (id) {
 114                 case WLAN_EID_SSID:
 115                         elems->ssid = pos;
 116                         elems->ssid_len = elen;
 117                         break;
 118                 case WLAN_EID_SUPP_RATES:
 119                         elems->supp_rates = pos;
 120                         elems->supp_rates_len = elen;
 121                         break;
 122                 case WLAN_EID_FH_PARAMS:
 123                         elems->fh_params = pos;
 124                         elems->fh_params_len = elen;
 125                         break;
 126                 case WLAN_EID_DS_PARAMS:
 127                         elems->ds_params = pos;
 128                         elems->ds_params_len = elen;
 129                         break;
 130                 case WLAN_EID_CF_PARAMS:
 131                         elems->cf_params = pos;
 132                         elems->cf_params_len = elen;
 133                         break;
 134                 case WLAN_EID_TIM:
 135                         elems->tim = pos;
 136                         elems->tim_len = elen;
 137                         break;
 138                 case WLAN_EID_IBSS_PARAMS:
 139                         elems->ibss_params = pos;
 140                         elems->ibss_params_len = elen;
 141                         break;
 142                 case WLAN_EID_CHALLENGE:
 143                         elems->challenge = pos;
 144                         elems->challenge_len = elen;
 145                         break;
 146                 case WLAN_EID_WPA:
 147                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 148                             pos[2] == 0xf2) {
 149                                 /* Microsoft OUI (00:50:F2) */
 150                                 if (pos[3] == 1) {
 151                                         /* OUI Type 1 - WPA IE */
 152                                         elems->wpa = pos;
 153                                         elems->wpa_len = elen;
 154                                 } else if (elen >= 5 && pos[3] == 2) {
 155                                         if (pos[4] == 0) {
 156                                                 elems->wmm_info = pos;
 157                                                 elems->wmm_info_len = elen;
 158                                         } else if (pos[4] == 1) {
 159                                                 elems->wmm_param = pos;
 160                                                 elems->wmm_param_len = elen;
 161                                         }
 162                                 }
 163                         }
 164                         break;
 165                 case WLAN_EID_RSN:
 166                         elems->rsn = pos;
 167                         elems->rsn_len = elen;
 168                         break;
 169                 case WLAN_EID_ERP_INFO:
 170                         elems->erp_info = pos;
 171                         elems->erp_info_len = elen;
 172                         break;
 173                 case WLAN_EID_EXT_SUPP_RATES:
 174                         elems->ext_supp_rates = pos;
 175                         elems->ext_supp_rates_len = elen;
 176                         break;
 177                 case WLAN_EID_HT_CAPABILITY:
 178                         elems->ht_cap_elem = pos;
 179                         elems->ht_cap_elem_len = elen;
 180                         break;
 181                 case WLAN_EID_HT_EXTRA_INFO:
 182                         elems->ht_info_elem = pos;
 183                         elems->ht_info_elem_len = elen;
 184                         break;
 185                 case WLAN_EID_MESH_ID:
 186                         elems->mesh_id = pos;
 187                         elems->mesh_id_len = elen;
 188                         break;
 189                 case WLAN_EID_MESH_CONFIG:
 190                         elems->mesh_config = pos;
 191                         elems->mesh_config_len = elen;
 192                         break;
 193                 case WLAN_EID_PEER_LINK:
 194                         elems->peer_link = pos;
 195                         elems->peer_link_len = elen;
 196                         break;
 197                 case WLAN_EID_PREQ:
 198                         elems->preq = pos;
 199                         elems->preq_len = elen;
 200                         break;
 201                 case WLAN_EID_PREP:
 202                         elems->prep = pos;
 203                         elems->prep_len = elen;
 204                         break;
 205                 case WLAN_EID_PERR:
 206                         elems->perr = pos;
 207                         elems->perr_len = elen;
 208                         break;
 209                 default:
 210                         break;
 211                 }
 212
 213                 left -= elen;
 214                 pos += elen;
 215         }
 216 }
 217
 218
 219 static int ecw2cw(int ecw)
 220 {
 221         return (1 << ecw) - 1;
 222 }
 223
 224 static void ieee80211_sta_wmm_params(struct net_device *dev,
 225                                      struct ieee80211_if_sta *ifsta,
 226                                      u8 *wmm_param, size_t wmm_param_len)
 227 {
 228         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 229         struct ieee80211_tx_queue_params params;
 230         size_t left;
 231         int count;
 232         u8 *pos;
 233
 234         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 235                 return;
 236         count = wmm_param[6] & 0x0f;
 237         if (count == ifsta->wmm_last_param_set)
 238                 return;
 239         ifsta->wmm_last_param_set = count;
 240
 241         pos = wmm_param + 8;
 242         left = wmm_param_len - 8;
 243
 244         memset(&params, 0, sizeof(params));
 245
 246         if (!local->ops->conf_tx)
 247                 return;
 248
 249         local->wmm_acm = 0;
 250         for (; left >= 4; left -= 4, pos += 4) {
 251                 int aci = (pos[0] >> 5) & 0x03;
 252                 int acm = (pos[0] >> 4) & 0x01;
 253                 int queue;
 254
 255                 switch (aci) {
 256                 case 1:
 257                         queue = IEEE80211_TX_QUEUE_DATA3;
 258                         if (acm) {
 259                                 local->wmm_acm |= BIT(0) | BIT(3);
 260                         }
 261                         break;
 262                 case 2:
 263                         queue = IEEE80211_TX_QUEUE_DATA1;
 264                         if (acm) {
 265                                 local->wmm_acm |= BIT(4) | BIT(5);
 266                         }
 267                         break;
 268                 case 3:
 269                         queue = IEEE80211_TX_QUEUE_DATA0;
 270                         if (acm) {
 271                                 local->wmm_acm |= BIT(6) | BIT(7);
 272                         }
 273                         break;
 274                 case 0:
 275                 default:
 276                         queue = IEEE80211_TX_QUEUE_DATA2;
 277                         if (acm) {
 278                                 local->wmm_acm |= BIT(1) | BIT(2);
 279                         }
 280                         break;
 281                 }
 282
 283                 params.aifs = pos[0] & 0x0f;
 284                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 285                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 286                 params.txop = pos[2] | (pos[3] << 8);
 287 #ifdef CONFIG_MAC80211_DEBUG
 288                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 289                        "cWmin=%d cWmax=%d txop=%d\n",
 290                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 291                        params.cw_max, params.txop);
 292 #endif
 293                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 294                  * AC for now) */
 295                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 296                         printk(KERN_DEBUG "%s: failed to set TX queue "
 297                                "parameters for queue %d\n", dev->name, queue);
 298                 }
 299         }
 300 }
 301
 302
 303 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 304                                    u8 erp_value)
 305 {
 306         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 307         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 308         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 309         bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 310         DECLARE_MAC_BUF(mac);
 311         u32 changed = 0;
 312
 313         if (use_protection != bss_conf->use_cts_prot) {
 314                 if (net_ratelimit()) {
 315                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 316                                "%s)\n",
 317                                sdata->dev->name,
 318                                use_protection ? "enabled" : "disabled",
 319                                print_mac(mac, ifsta->bssid));
 320                 }
 321                 bss_conf->use_cts_prot = use_protection;
 322                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 323         }
 324
 325         if (preamble_mode != bss_conf->use_short_preamble) {
 326                 if (net_ratelimit()) {
 327                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 328                                " (BSSID=%s)\n",
 329                                sdata->dev->name,
 330                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 331                                         "short" : "long",
 332                                print_mac(mac, ifsta->bssid));
 333                 }
 334                 bss_conf->use_short_preamble = preamble_mode;
 335                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 336         }
 337
 338         return changed;
 339 }
 340
 341 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 342                                    struct ieee80211_ht_info *ht_info)
 343 {
 344
 345         if (ht_info == NULL)
 346                 return -EINVAL;
 347
 348         memset(ht_info, 0, sizeof(*ht_info));
 349
 350         if (ht_cap_ie) {
 351                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 352
 353                 ht_info->ht_supported = 1;
 354                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 355                 ht_info->ampdu_factor =
 356                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 357                 ht_info->ampdu_density =
 358                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 359                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 360         } else
 361                 ht_info->ht_supported = 0;
 362
 363         return 0;
 364 }
 365
 366 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 367                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 368                         struct ieee80211_ht_bss_info *bss_info)
 369 {
 370         if (bss_info == NULL)
 371                 return -EINVAL;
 372
 373         memset(bss_info, 0, sizeof(*bss_info));
 374
 375         if (ht_add_info_ie) {
 376                 u16 op_mode;
 377                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 378
 379                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 380                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 381                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 382         }
 383
 384         return 0;
 385 }
 386
 387 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 388                                          struct ieee80211_if_sta *ifsta)
 389 {
 390         char *buf;
 391         size_t len;
 392         int i;
 393         union iwreq_data wrqu;
 394
 395         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 396                 return;
 397
 398         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 399                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 400         if (!buf)
 401                 return;
 402
 403         len = sprintf(buf, "ASSOCINFO(");
 404         if (ifsta->assocreq_ies) {
 405                 len += sprintf(buf + len, "ReqIEs=");
 406                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 407                         len += sprintf(buf + len, "%02x",
 408                                        ifsta->assocreq_ies[i]);
 409                 }
 410         }
 411         if (ifsta->assocresp_ies) {
 412                 if (ifsta->assocreq_ies)
 413                         len += sprintf(buf + len, " ");
 414                 len += sprintf(buf + len, "RespIEs=");
 415                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 416                         len += sprintf(buf + len, "%02x",
 417                                        ifsta->assocresp_ies[i]);
 418                 }
 419         }
 420         len += sprintf(buf + len, ")");
 421
 422         if (len > IW_CUSTOM_MAX) {
 423                 len = sprintf(buf, "ASSOCRESPIE=");
 424                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 425                         len += sprintf(buf + len, "%02x",
 426                                        ifsta->assocresp_ies[i]);
 427                 }
 428         }
 429
 430         memset(&wrqu, 0, sizeof(wrqu));
 431         wrqu.data.length = len;
 432         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 433
 434         kfree(buf);
 435 }
 436
 437
 438 static void ieee80211_set_associated(struct net_device *dev,
 439                                      struct ieee80211_if_sta *ifsta,
 440                                      bool assoc)
 441 {
 442         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 443         struct ieee80211_local *local = sdata->local;
 444         union iwreq_data wrqu;
 445         u32 changed = BSS_CHANGED_ASSOC;
 446
 447         if (assoc) {
 448                 struct ieee80211_sta_bss *bss;
 449
 450                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 451
 452                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 453                         return;
 454
 455                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 456                                            local->hw.conf.channel->center_freq,
 457                                            ifsta->ssid, ifsta->ssid_len);
 458                 if (bss) {
 459                         if (bss->has_erp_value)
 460                                 changed |= ieee80211_handle_erp_ie(
 461                                                 sdata, bss->erp_value);
 462                         ieee80211_rx_bss_put(dev, bss);
 463                 }
 464
 465                 netif_carrier_on(dev);
 466                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 467                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 468                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 469                 ieee80211_sta_send_associnfo(dev, ifsta);
 470         } else {
 471                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 472
 473                 netif_carrier_off(dev);
 474                 ieee80211_reset_erp_info(dev);
 475                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 476         }
 477         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 478         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 479         ifsta->last_probe = jiffies;
 480         ieee80211_led_assoc(local, assoc);
 481
 482         sdata->bss_conf.assoc = assoc;
 483         ieee80211_bss_info_change_notify(sdata, changed);
 484 }
 485
 486 static void ieee80211_set_disassoc(struct net_device *dev,
 487                                    struct ieee80211_if_sta *ifsta, int deauth)
 488 {
 489         if (deauth)
 490                 ifsta->auth_tries = 0;
 491         ifsta->assoc_tries = 0;
 492         ieee80211_set_associated(dev, ifsta, 0);
 493 }
 494
 495 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 496                       int encrypt)
 497 {
 498         struct ieee80211_sub_if_data *sdata;
 499         struct ieee80211_tx_packet_data *pkt_data;
 500
 501         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 502         skb->dev = sdata->local->mdev;
 503         skb_set_mac_header(skb, 0);
 504         skb_set_network_header(skb, 0);
 505         skb_set_transport_header(skb, 0);
 506
 507         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 508         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 509         pkt_data->ifindex = sdata->dev->ifindex;
 510         if (!encrypt)
 511                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 512
 513         dev_queue_xmit(skb);
 514 }
 515
 516
 517 static void ieee80211_send_auth(struct net_device *dev,
 518                                 struct ieee80211_if_sta *ifsta,
 519                                 int transaction, u8 *extra, size_t extra_len,
 520                                 int encrypt)
 521 {
 522         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 523         struct sk_buff *skb;
 524         struct ieee80211_mgmt *mgmt;
 525
 526         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 527                             sizeof(*mgmt) + 6 + extra_len);
 528         if (!skb) {
 529                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 530                        "frame\n", dev->name);
 531                 return;
 532         }
 533         skb_reserve(skb, local->hw.extra_tx_headroom);
 534
 535         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 536         memset(mgmt, 0, 24 + 6);
 537         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 538                                            IEEE80211_STYPE_AUTH);
 539         if (encrypt)
 540                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 541         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 542         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 543         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 544         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 545         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 546         ifsta->auth_transaction = transaction + 1;
 547         mgmt->u.auth.status_code = cpu_to_le16(0);
 548         if (extra)
 549                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 550
 551         ieee80211_sta_tx(dev, skb, encrypt);
 552 }
 553
 554
 555 static void ieee80211_authenticate(struct net_device *dev,
 556                                    struct ieee80211_if_sta *ifsta)
 557 {
 558         DECLARE_MAC_BUF(mac);
 559
 560         ifsta->auth_tries++;
 561         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 562                 printk(KERN_DEBUG "%s: authentication with AP %s"
 563                        " timed out\n",
 564                        dev->name, print_mac(mac, ifsta->bssid));
 565                 ifsta->state = IEEE80211_DISABLED;
 566                 return;
 567         }
 568
 569         ifsta->state = IEEE80211_AUTHENTICATE;
 570         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 571                dev->name, print_mac(mac, ifsta->bssid));
 572
 573         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 574
 575         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 576 }
 577
 578
 579 static void ieee80211_send_assoc(struct net_device *dev,
 580                                  struct ieee80211_if_sta *ifsta)
 581 {
 582         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 583         struct sk_buff *skb;
 584         struct ieee80211_mgmt *mgmt;
 585         u8 *pos, *ies;
 586         int i, len;
 587         u16 capab;
 588         struct ieee80211_sta_bss *bss;
 589         int wmm = 0;
 590         struct ieee80211_supported_band *sband;
 591
 592         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 593                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 594                             ifsta->ssid_len);
 595         if (!skb) {
 596                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 597                        "frame\n", dev->name);
 598                 return;
 599         }
 600         skb_reserve(skb, local->hw.extra_tx_headroom);
 601
 602         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 603
 604         capab = ifsta->capab;
 605
 606         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 607                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 608                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 609                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 610                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 611         }
 612
 613         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 614                                    local->hw.conf.channel->center_freq,
 615                                    ifsta->ssid, ifsta->ssid_len);
 616         if (bss) {
 617                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 618                         capab |= WLAN_CAPABILITY_PRIVACY;
 619                 if (bss->wmm_ie) {
 620                         wmm = 1;
 621                 }
 622                 ieee80211_rx_bss_put(dev, bss);
 623         }
 624
 625         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 626         memset(mgmt, 0, 24);
 627         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 628         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 629         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 630
 631         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 632                 skb_put(skb, 10);
 633                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 634                                                    IEEE80211_STYPE_REASSOC_REQ);
 635                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 636                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 637                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 638                        ETH_ALEN);
 639         } else {
 640                 skb_put(skb, 4);
 641                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 642                                                    IEEE80211_STYPE_ASSOC_REQ);
 643                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 644                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 645         }
 646
 647         /* SSID */
 648         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 649         *pos++ = WLAN_EID_SSID;
 650         *pos++ = ifsta->ssid_len;
 651         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 652
 653         len = sband->n_bitrates;
 654         if (len > 8)
 655                 len = 8;
 656         pos = skb_put(skb, len + 2);
 657         *pos++ = WLAN_EID_SUPP_RATES;
 658         *pos++ = len;
 659         for (i = 0; i < len; i++) {
 660                 int rate = sband->bitrates[i].bitrate;
 661                 *pos++ = (u8) (rate / 5);
 662         }
 663
 664         if (sband->n_bitrates > len) {
 665                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 666                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 667                 *pos++ = sband->n_bitrates - len;
 668                 for (i = len; i < sband->n_bitrates; i++) {
 669                         int rate = sband->bitrates[i].bitrate;
 670                         *pos++ = (u8) (rate / 5);
 671                 }
 672         }
 673
 674         if (ifsta->extra_ie) {
 675                 pos = skb_put(skb, ifsta->extra_ie_len);
 676                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 677         }
 678
 679         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 680                 pos = skb_put(skb, 9);
 681                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 682                 *pos++ = 7; /* len */
 683                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 684                 *pos++ = 0x50;
 685                 *pos++ = 0xf2;
 686                 *pos++ = 2; /* WME */
 687                 *pos++ = 0; /* WME info */
 688                 *pos++ = 1; /* WME ver */
 689                 *pos++ = 0;
 690         }
 691         /* wmm support is a must to HT */
 692         if (wmm && sband->ht_info.ht_supported) {
 693                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 694                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 695                 *pos++ = WLAN_EID_HT_CAPABILITY;
 696                 *pos++ = sizeof(struct ieee80211_ht_cap);
 697                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 698                 memcpy(pos, &tmp, sizeof(u16));
 699                 pos += sizeof(u16);
 700                 /* TODO: needs a define here for << 2 */
 701                 *pos++ = sband->ht_info.ampdu_factor |
 702                          (sband->ht_info.ampdu_density << 2);
 703                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 704         }
 705
 706         kfree(ifsta->assocreq_ies);
 707         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 708         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 709         if (ifsta->assocreq_ies)
 710                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 711
 712         ieee80211_sta_tx(dev, skb, 0);
 713 }
 714
 715
 716 static void ieee80211_send_deauth(struct net_device *dev,
 717                                   struct ieee80211_if_sta *ifsta, u16 reason)
 718 {
 719         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 720         struct sk_buff *skb;
 721         struct ieee80211_mgmt *mgmt;
 722
 723         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 724         if (!skb) {
 725                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 726                        "frame\n", dev->name);
 727                 return;
 728         }
 729         skb_reserve(skb, local->hw.extra_tx_headroom);
 730
 731         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 732         memset(mgmt, 0, 24);
 733         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 734         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 735         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 736         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 737                                            IEEE80211_STYPE_DEAUTH);
 738         skb_put(skb, 2);
 739         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 740
 741         ieee80211_sta_tx(dev, skb, 0);
 742 }
 743
 744
 745 static void ieee80211_send_disassoc(struct net_device *dev,
 746                                     struct ieee80211_if_sta *ifsta, u16 reason)
 747 {
 748         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 749         struct sk_buff *skb;
 750         struct ieee80211_mgmt *mgmt;
 751
 752         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 753         if (!skb) {
 754                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 755                        "frame\n", dev->name);
 756                 return;
 757         }
 758         skb_reserve(skb, local->hw.extra_tx_headroom);
 759
 760         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 761         memset(mgmt, 0, 24);
 762         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 763         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 764         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 765         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 766                                            IEEE80211_STYPE_DISASSOC);
 767         skb_put(skb, 2);
 768         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 769
 770         ieee80211_sta_tx(dev, skb, 0);
 771 }
 772
 773
 774 static int ieee80211_privacy_mismatch(struct net_device *dev,
 775                                       struct ieee80211_if_sta *ifsta)
 776 {
 777         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 778         struct ieee80211_sta_bss *bss;
 779         int bss_privacy;
 780         int wep_privacy;
 781         int privacy_invoked;
 782
 783         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 784                 return 0;
 785
 786         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 787                                    local->hw.conf.channel->center_freq,
 788                                    ifsta->ssid, ifsta->ssid_len);
 789         if (!bss)
 790                 return 0;
 791
 792         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 793         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 794         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 795
 796         ieee80211_rx_bss_put(dev, bss);
 797
 798         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 799                 return 0;
 800
 801         return 1;
 802 }
 803
 804
 805 static void ieee80211_associate(struct net_device *dev,
 806                                 struct ieee80211_if_sta *ifsta)
 807 {
 808         DECLARE_MAC_BUF(mac);
 809
 810         ifsta->assoc_tries++;
 811         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 812                 printk(KERN_DEBUG "%s: association with AP %s"
 813                        " timed out\n",
 814                        dev->name, print_mac(mac, ifsta->bssid));
 815                 ifsta->state = IEEE80211_DISABLED;
 816                 return;
 817         }
 818
 819         ifsta->state = IEEE80211_ASSOCIATE;
 820         printk(KERN_DEBUG "%s: associate with AP %s\n",
 821                dev->name, print_mac(mac, ifsta->bssid));
 822         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 823                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 824                        "mixed-cell disabled - abort association\n", dev->name);
 825                 ifsta->state = IEEE80211_DISABLED;
 826                 return;
 827         }
 828
 829         ieee80211_send_assoc(dev, ifsta);
 830
 831         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 832 }
 833
 834
 835 static void ieee80211_associated(struct net_device *dev,
 836                                  struct ieee80211_if_sta *ifsta)
 837 {
 838         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 839         struct sta_info *sta;
 840         int disassoc;
 841         DECLARE_MAC_BUF(mac);
 842
 843         /* TODO: start monitoring current AP signal quality and number of
 844          * missed beacons. Scan other channels every now and then and search
 845          * for better APs. */
 846         /* TODO: remove expired BSSes */
 847
 848         ifsta->state = IEEE80211_ASSOCIATED;
 849
 850         sta = sta_info_get(local, ifsta->bssid);
 851         if (!sta) {
 852                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 853                        dev->name, print_mac(mac, ifsta->bssid));
 854                 disassoc = 1;
 855         } else {
 856                 disassoc = 0;
 857                 if (time_after(jiffies,
 858                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 859                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 860                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 861                                        "current AP %s - assume out of "
 862                                        "range\n",
 863                                        dev->name, print_mac(mac, ifsta->bssid));
 864                                 disassoc = 1;
 865                                 sta_info_free(sta);
 866                         } else
 867                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 868                                                          local->scan_ssid,
 869                                                          local->scan_ssid_len);
 870                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 871                 } else {
 872                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 873                         if (time_after(jiffies, ifsta->last_probe +
 874                                        IEEE80211_PROBE_INTERVAL)) {
 875                                 ifsta->last_probe = jiffies;
 876                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 877                                                          ifsta->ssid,
 878                                                          ifsta->ssid_len);
 879                         }
 880                 }
 881                 sta_info_put(sta);
 882         }
 883         if (disassoc) {
 884                 ifsta->state = IEEE80211_DISABLED;
 885                 ieee80211_set_associated(dev, ifsta, 0);
 886         } else {
 887                 mod_timer(&ifsta->timer, jiffies +
 888                                       IEEE80211_MONITORING_INTERVAL);
 889         }
 890 }
 891
 892
 893 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 894                                      u8 *ssid, size_t ssid_len)
 895 {
 896         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 897         struct ieee80211_supported_band *sband;
 898         struct sk_buff *skb;
 899         struct ieee80211_mgmt *mgmt;
 900         u8 *pos, *supp_rates, *esupp_rates = NULL;
 901         int i;
 902
 903         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 904         if (!skb) {
 905                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 906                        "request\n", dev->name);
 907                 return;
 908         }
 909         skb_reserve(skb, local->hw.extra_tx_headroom);
 910
 911         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 912         memset(mgmt, 0, 24);
 913         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 914                                            IEEE80211_STYPE_PROBE_REQ);
 915         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 916         if (dst) {
 917                 memcpy(mgmt->da, dst, ETH_ALEN);
 918                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 919         } else {
 920                 memset(mgmt->da, 0xff, ETH_ALEN);
 921                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 922         }
 923         pos = skb_put(skb, 2 + ssid_len);
 924         *pos++ = WLAN_EID_SSID;
 925         *pos++ = ssid_len;
 926         memcpy(pos, ssid, ssid_len);
 927
 928         supp_rates = skb_put(skb, 2);
 929         supp_rates[0] = WLAN_EID_SUPP_RATES;
 930         supp_rates[1] = 0;
 931         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 932
 933         for (i = 0; i < sband->n_bitrates; i++) {
 934                 struct ieee80211_rate *rate = &sband->bitrates[i];
 935                 if (esupp_rates) {
 936                         pos = skb_put(skb, 1);
 937                         esupp_rates[1]++;
 938                 } else if (supp_rates[1] == 8) {
 939                         esupp_rates = skb_put(skb, 3);
 940                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 941                         esupp_rates[1] = 1;
 942                         pos = &esupp_rates[2];
 943                 } else {
 944                         pos = skb_put(skb, 1);
 945                         supp_rates[1]++;
 946                 }
 947                 *pos = rate->bitrate / 5;
 948         }
 949
 950         ieee80211_sta_tx(dev, skb, 0);
 951 }
 952
 953
 954 static int ieee80211_sta_wep_configured(struct net_device *dev)
 955 {
 956         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 957         if (!sdata || !sdata->default_key ||
 958             sdata->default_key->conf.alg != ALG_WEP)
 959                 return 0;
 960         return 1;
 961 }
 962
 963
 964 static void ieee80211_auth_completed(struct net_device *dev,
 965                                      struct ieee80211_if_sta *ifsta)
 966 {
 967         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 968         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 969         ieee80211_associate(dev, ifsta);
 970 }
 971
 972
 973 static void ieee80211_auth_challenge(struct net_device *dev,
 974                                      struct ieee80211_if_sta *ifsta,
 975                                      struct ieee80211_mgmt *mgmt,
 976                                      size_t len)
 977 {
 978         u8 *pos;
 979         struct ieee802_11_elems elems;
 980
 981         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 982         pos = mgmt->u.auth.variable;
 983         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 984         if (!elems.challenge) {
 985                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 986                        "frame\n", dev->name);
 987                 return;
 988         }
 989         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 990                             elems.challenge_len + 2, 1);
 991 }
 992
 993 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
 994                                         u8 dialog_token, u16 status, u16 policy,
 995                                         u16 buf_size, u16 timeout)
 996 {
 997         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 998         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 999         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1000         struct sk_buff *skb;
1001         struct ieee80211_mgmt *mgmt;
1002         u16 capab;
1003
1004         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1005                                         sizeof(mgmt->u.action.u.addba_resp));
1006         if (!skb) {
1007                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1008                        "for addba resp frame\n", dev->name);
1009                 return;
1010         }
1011
1012         skb_reserve(skb, local->hw.extra_tx_headroom);
1013         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1014         memset(mgmt, 0, 24);
1015         memcpy(mgmt->da, da, ETH_ALEN);
1016         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1017         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1018                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1019         else
1020                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1021         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1022                                            IEEE80211_STYPE_ACTION);
1023
1024         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1025         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1026         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1027         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1028
1029         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1030         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1031         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1032
1033         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1034         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1035         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1036
1037         ieee80211_sta_tx(dev, skb, 0);
1038
1039         return;
1040 }
1041
1042 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1043                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1044                                 u16 agg_size, u16 timeout)
1045 {
1046         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1047         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1048         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1049         struct sk_buff *skb;
1050         struct ieee80211_mgmt *mgmt;
1051         u16 capab;
1052
1053         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1054                                 sizeof(mgmt->u.action.u.addba_req));
1055
1056
1057         if (!skb) {
1058                 printk(KERN_ERR "%s: failed to allocate buffer "
1059                                 "for addba request frame\n", dev->name);
1060                 return;
1061         }
1062         skb_reserve(skb, local->hw.extra_tx_headroom);
1063         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1064         memset(mgmt, 0, 24);
1065         memcpy(mgmt->da, da, ETH_ALEN);
1066         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1067         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1068                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1069         else
1070                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1071
1072         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1073                                         IEEE80211_STYPE_ACTION);
1074
1075         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1076
1077         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1078         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1079
1080         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1081         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1082         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1083         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1084
1085         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1086
1087         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1088         mgmt->u.action.u.addba_req.start_seq_num =
1089                                         cpu_to_le16(start_seq_num << 4);
1090
1091         ieee80211_sta_tx(dev, skb, 0);
1092 }
1093
1094 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1095                                                 struct ieee80211_mgmt *mgmt,
1096                                                 size_t len)
1097 {
1098         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1099         struct ieee80211_hw *hw = &local->hw;
1100         struct ieee80211_conf *conf = &hw->conf;
1101         struct sta_info *sta;
1102         struct tid_ampdu_rx *tid_agg_rx;
1103         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1104         u8 dialog_token;
1105         int ret = -EOPNOTSUPP;
1106         DECLARE_MAC_BUF(mac);
1107
1108         sta = sta_info_get(local, mgmt->sa);
1109         if (!sta)
1110                 return;
1111
1112         /* extract session parameters from addba request frame */
1113         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1114         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1115         start_seq_num =
1116                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1117
1118         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1119         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1120         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1121         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1122
1123         status = WLAN_STATUS_REQUEST_DECLINED;
1124
1125         /* sanity check for incoming parameters:
1126          * check if configuration can support the BA policy
1127          * and if buffer size does not exceeds max value */
1128         if (((ba_policy != 1)
1129                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1130                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1131                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1132 #ifdef CONFIG_MAC80211_HT_DEBUG
1133                 if (net_ratelimit())
1134                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1135                                 "%s on tid %u. policy %d, buffer size %d\n",
1136                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1137                                 buf_size);
1138 #endif /* CONFIG_MAC80211_HT_DEBUG */
1139                 goto end_no_lock;
1140         }
1141         /* determine default buffer size */
1142         if (buf_size == 0) {
1143                 struct ieee80211_supported_band *sband;
1144
1145                 sband = local->hw.wiphy->bands[conf->channel->band];
1146                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1147                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1148         }
1149
1150         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1151
1152         /* examine state machine */
1153         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1154
1155         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1156 #ifdef CONFIG_MAC80211_HT_DEBUG
1157                 if (net_ratelimit())
1158                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1159                                 "%s on tid %u\n",
1160                                 print_mac(mac, mgmt->sa), tid);
1161 #endif /* CONFIG_MAC80211_HT_DEBUG */
1162                 goto end;
1163         }
1164
1165         /* prepare reordering buffer */
1166         tid_agg_rx->reorder_buf =
1167                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1168         if (!tid_agg_rx->reorder_buf) {
1169                 if (net_ratelimit())
1170                         printk(KERN_ERR "can not allocate reordering buffer "
1171                                "to tid %d\n", tid);
1172                 goto end;
1173         }
1174         memset(tid_agg_rx->reorder_buf, 0,
1175                 buf_size * sizeof(struct sk_buf *));
1176
1177         if (local->ops->ampdu_action)
1178                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1179                                                sta->addr, tid, &start_seq_num);
1180 #ifdef CONFIG_MAC80211_HT_DEBUG
1181         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1182 #endif /* CONFIG_MAC80211_HT_DEBUG */
1183
1184         if (ret) {
1185                 kfree(tid_agg_rx->reorder_buf);
1186                 goto end;
1187         }
1188
1189         /* change state and send addba resp */
1190         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1191         tid_agg_rx->dialog_token = dialog_token;
1192         tid_agg_rx->ssn = start_seq_num;
1193         tid_agg_rx->head_seq_num = start_seq_num;
1194         tid_agg_rx->buf_size = buf_size;
1195         tid_agg_rx->timeout = timeout;
1196         tid_agg_rx->stored_mpdu_num = 0;
1197         status = WLAN_STATUS_SUCCESS;
1198 end:
1199         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1200
1201 end_no_lock:
1202         ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1203                                 status, 1, buf_size, timeout);
1204         sta_info_put(sta);
1205 }
1206
1207 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1208                                              struct ieee80211_mgmt *mgmt,
1209                                              size_t len)
1210 {
1211         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1212         struct ieee80211_hw *hw = &local->hw;
1213         struct sta_info *sta;
1214         u16 capab;
1215         u16 tid;
1216         u8 *state;
1217
1218         sta = sta_info_get(local, mgmt->sa);
1219         if (!sta)
1220                 return;
1221
1222         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1223         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1224
1225         state = &sta->ampdu_mlme.tid_tx[tid].state;
1226
1227         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1228
1229         if (mgmt->u.action.u.addba_resp.dialog_token !=
1230                 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1231                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1232 #ifdef CONFIG_MAC80211_HT_DEBUG
1233                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1234 #endif /* CONFIG_MAC80211_HT_DEBUG */
1235                 sta_info_put(sta);
1236                 return;
1237         }
1238
1239         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1240 #ifdef CONFIG_MAC80211_HT_DEBUG
1241         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1242 #endif /* CONFIG_MAC80211_HT_DEBUG */
1243         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1244                         == WLAN_STATUS_SUCCESS) {
1245                 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1246                         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1247                         printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1248                                 "%d\n", *state);
1249                         sta_info_put(sta);
1250                         return;
1251                 }
1252
1253                 if (*state & HT_ADDBA_RECEIVED_MSK)
1254                         printk(KERN_DEBUG "double addBA response\n");
1255
1256                 *state |= HT_ADDBA_RECEIVED_MSK;
1257                 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1258
1259                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1260                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1261                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1262                 }
1263
1264                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1265                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1266         } else {
1267                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1268
1269                 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1270                 /* this will allow the state check in stop_BA_session */
1271                 *state = HT_AGG_STATE_OPERATIONAL;
1272                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1273                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1274                                              WLAN_BACK_INITIATOR);
1275         }
1276         sta_info_put(sta);
1277 }
1278
1279 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1280                           u16 initiator, u16 reason_code)
1281 {
1282         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1283         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1284         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1285         struct sk_buff *skb;
1286         struct ieee80211_mgmt *mgmt;
1287         u16 params;
1288
1289         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1290                                         sizeof(mgmt->u.action.u.delba));
1291
1292         if (!skb) {
1293                 printk(KERN_ERR "%s: failed to allocate buffer "
1294                                         "for delba frame\n", dev->name);
1295                 return;
1296         }
1297
1298         skb_reserve(skb, local->hw.extra_tx_headroom);
1299         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1300         memset(mgmt, 0, 24);
1301         memcpy(mgmt->da, da, ETH_ALEN);
1302         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1303         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1304                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1305         else
1306                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1307         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1308                                         IEEE80211_STYPE_ACTION);
1309
1310         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1311
1312         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1313         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1314         params = (u16)(initiator << 11);        /* bit 11 initiator */
1315         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1316
1317         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1318         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1319
1320         ieee80211_sta_tx(dev, skb, 0);
1321 }
1322
1323 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1324                                         u16 initiator, u16 reason)
1325 {
1326         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1327         struct ieee80211_hw *hw = &local->hw;
1328         struct sta_info *sta;
1329         int ret, i;
1330
1331         sta = sta_info_get(local, ra);
1332         if (!sta)
1333                 return;
1334
1335         /* check if TID is in operational state */
1336         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1337         if (sta->ampdu_mlme.tid_rx[tid].state
1338                                 != HT_AGG_STATE_OPERATIONAL) {
1339                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1340                 sta_info_put(sta);
1341                 return;
1342         }
1343         sta->ampdu_mlme.tid_rx[tid].state =
1344                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1345                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1346                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1347
1348         /* stop HW Rx aggregation. ampdu_action existence
1349          * already verified in session init so we add the BUG_ON */
1350         BUG_ON(!local->ops->ampdu_action);
1351
1352         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1353                                         ra, tid, NULL);
1354         if (ret)
1355                 printk(KERN_DEBUG "HW problem - can not stop rx "
1356                                 "aggergation for tid %d\n", tid);
1357
1358         /* shutdown timer has not expired */
1359         if (initiator != WLAN_BACK_TIMER)
1360                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1361                                         session_timer);
1362
1363         /* check if this is a self generated aggregation halt */
1364         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1365                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1366
1367         /* free the reordering buffer */
1368         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1369                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1370                         /* release the reordered frames */
1371                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1372                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1373                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1374                 }
1375         }
1376         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1377
1378         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1379         sta_info_put(sta);
1380 }
1381
1382
1383 static void ieee80211_sta_process_delba(struct net_device *dev,
1384                         struct ieee80211_mgmt *mgmt, size_t len)
1385 {
1386         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1387         struct sta_info *sta;
1388         u16 tid, params;
1389         u16 initiator;
1390         DECLARE_MAC_BUF(mac);
1391
1392         sta = sta_info_get(local, mgmt->sa);
1393         if (!sta)
1394                 return;
1395
1396         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1397         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1398         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1399
1400 #ifdef CONFIG_MAC80211_HT_DEBUG
1401         if (net_ratelimit())
1402                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1403                         print_mac(mac, mgmt->sa),
1404                         initiator ? "recipient" : "initiator", tid,
1405                         mgmt->u.action.u.delba.reason_code);
1406 #endif /* CONFIG_MAC80211_HT_DEBUG */
1407
1408         if (initiator == WLAN_BACK_INITIATOR)
1409                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1410                                                  WLAN_BACK_INITIATOR, 0);
1411         else { /* WLAN_BACK_RECIPIENT */
1412                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1413                 sta->ampdu_mlme.tid_tx[tid].state =
1414                                 HT_AGG_STATE_OPERATIONAL;
1415                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1416                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1417                                              WLAN_BACK_RECIPIENT);
1418         }
1419         sta_info_put(sta);
1420 }
1421
1422 /*
1423  * After sending add Block Ack request we activated a timer until
1424  * add Block Ack response will arrive from the recipient.
1425  * If this timer expires sta_addba_resp_timer_expired will be executed.
1426  */
1427 void sta_addba_resp_timer_expired(unsigned long data)
1428 {
1429         /* not an elegant detour, but there is no choice as the timer passes
1430          * only one argument, and both sta_info and TID are needed, so init
1431          * flow in sta_info_add gives the TID as data, while the timer_to_id
1432          * array gives the sta through container_of */
1433         u16 tid = *(int *)data;
1434         struct sta_info *temp_sta = container_of((void *)data,
1435                 struct sta_info, timer_to_tid[tid]);
1436
1437         struct ieee80211_local *local = temp_sta->local;
1438         struct ieee80211_hw *hw = &local->hw;
1439         struct sta_info *sta;
1440         u8 *state;
1441
1442         sta = sta_info_get(local, temp_sta->addr);
1443         if (!sta)
1444                 return;
1445
1446         state = &sta->ampdu_mlme.tid_tx[tid].state;
1447         /* check if the TID waits for addBA response */
1448         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1449         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1450                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1451                 *state = HT_AGG_STATE_IDLE;
1452                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1453                                 "expecting addBA response there", tid);
1454                 goto timer_expired_exit;
1455         }
1456
1457         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1458
1459         /* go through the state check in stop_BA_session */
1460         *state = HT_AGG_STATE_OPERATIONAL;
1461         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1462         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1463                                      WLAN_BACK_INITIATOR);
1464
1465 timer_expired_exit:
1466         sta_info_put(sta);
1467 }
1468
1469 /*
1470  * After receiving Block Ack Request (BAR) we activated a
1471  * timer after each frame arrives from the originator.
1472  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1473  */
1474 void sta_rx_agg_session_timer_expired(unsigned long data)
1475 {
1476         /* not an elegant detour, but there is no choice as the timer passes
1477          * only one argument, and verious sta_info are needed here, so init
1478          * flow in sta_info_add gives the TID as data, while the timer_to_id
1479          * array gives the sta through container_of */
1480         u8 *ptid = (u8 *)data;
1481         u8 *timer_to_id = ptid - *ptid;
1482         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1483                                          timer_to_tid[0]);
1484
1485         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1486         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1487                                          WLAN_BACK_TIMER,
1488                                          WLAN_REASON_QSTA_TIMEOUT);
1489 }
1490
1491
1492 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1493                                    struct ieee80211_if_sta *ifsta,
1494                                    struct ieee80211_mgmt *mgmt,
1495                                    size_t len)
1496 {
1497         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1498         u16 auth_alg, auth_transaction, status_code;
1499         DECLARE_MAC_BUF(mac);
1500
1501         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1502             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1503                 printk(KERN_DEBUG "%s: authentication frame received from "
1504                        "%s, but not in authenticate state - ignored\n",
1505                        dev->name, print_mac(mac, mgmt->sa));
1506                 return;
1507         }
1508
1509         if (len < 24 + 6) {
1510                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1511                        "received from %s - ignored\n",
1512                        dev->name, len, print_mac(mac, mgmt->sa));
1513                 return;
1514         }
1515
1516         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1517             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1518                 printk(KERN_DEBUG "%s: authentication frame received from "
1519                        "unknown AP (SA=%s BSSID=%s) - "
1520                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1521                        print_mac(mac, mgmt->bssid));
1522                 return;
1523         }
1524
1525         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1526             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1527                 printk(KERN_DEBUG "%s: authentication frame received from "
1528                        "unknown BSSID (SA=%s BSSID=%s) - "
1529                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1530                        print_mac(mac, mgmt->bssid));
1531                 return;
1532         }
1533
1534         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1535         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1536         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1537
1538         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1539                "transaction=%d status=%d)\n",
1540                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1541                auth_transaction, status_code);
1542
1543         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1544                 /* IEEE 802.11 standard does not require authentication in IBSS
1545                  * networks and most implementations do not seem to use it.
1546                  * However, try to reply to authentication attempts if someone
1547                  * has actually implemented this.
1548                  * TODO: Could implement shared key authentication. */
1549                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1550                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1551                                "frame (alg=%d transaction=%d)\n",
1552                                dev->name, auth_alg, auth_transaction);
1553                         return;
1554                 }
1555                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1556         }
1557
1558         if (auth_alg != ifsta->auth_alg ||
1559             auth_transaction != ifsta->auth_transaction) {
1560                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1561                        "(alg=%d transaction=%d)\n",
1562                        dev->name, auth_alg, auth_transaction);
1563                 return;
1564         }
1565
1566         if (status_code != WLAN_STATUS_SUCCESS) {
1567                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1568                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1569                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1570                         u8 algs[3];
1571                         const int num_algs = ARRAY_SIZE(algs);
1572                         int i, pos;
1573                         algs[0] = algs[1] = algs[2] = 0xff;
1574                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1575                                 algs[0] = WLAN_AUTH_OPEN;
1576                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1577                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1578                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1579                                 algs[2] = WLAN_AUTH_LEAP;
1580                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1581                                 pos = 0;
1582                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1583                                 pos = 1;
1584                         else
1585                                 pos = 2;
1586                         for (i = 0; i < num_algs; i++) {
1587                                 pos++;
1588                                 if (pos >= num_algs)
1589                                         pos = 0;
1590                                 if (algs[pos] == ifsta->auth_alg ||
1591                                     algs[pos] == 0xff)
1592                                         continue;
1593                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1594                                     !ieee80211_sta_wep_configured(dev))
1595                                         continue;
1596                                 ifsta->auth_alg = algs[pos];
1597                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1598                                        "next try\n",
1599                                        dev->name, ifsta->auth_alg);
1600                                 break;
1601                         }
1602                 }
1603                 return;
1604         }
1605
1606         switch (ifsta->auth_alg) {
1607         case WLAN_AUTH_OPEN:
1608         case WLAN_AUTH_LEAP:
1609                 ieee80211_auth_completed(dev, ifsta);
1610                 break;
1611         case WLAN_AUTH_SHARED_KEY:
1612                 if (ifsta->auth_transaction == 4)
1613                         ieee80211_auth_completed(dev, ifsta);
1614                 else
1615                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1616                 break;
1617         }
1618 }
1619
1620
1621 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1622                                      struct ieee80211_if_sta *ifsta,
1623                                      struct ieee80211_mgmt *mgmt,
1624                                      size_t len)
1625 {
1626         u16 reason_code;
1627         DECLARE_MAC_BUF(mac);
1628
1629         if (len < 24 + 2) {
1630                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1631                        "received from %s - ignored\n",
1632                        dev->name, len, print_mac(mac, mgmt->sa));
1633                 return;
1634         }
1635
1636         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1637                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1638                        "unknown AP (SA=%s BSSID=%s) - "
1639                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1640                        print_mac(mac, mgmt->bssid));
1641                 return;
1642         }
1643
1644         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1645
1646         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1647                " (reason=%d)\n",
1648                dev->name, print_mac(mac, mgmt->sa), reason_code);
1649
1650         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1651                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1652         }
1653
1654         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1655             ifsta->state == IEEE80211_ASSOCIATE ||
1656             ifsta->state == IEEE80211_ASSOCIATED) {
1657                 ifsta->state = IEEE80211_AUTHENTICATE;
1658                 mod_timer(&ifsta->timer, jiffies +
1659                                       IEEE80211_RETRY_AUTH_INTERVAL);
1660         }
1661
1662         ieee80211_set_disassoc(dev, ifsta, 1);
1663         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1664 }
1665
1666
1667 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1668                                        struct ieee80211_if_sta *ifsta,
1669                                        struct ieee80211_mgmt *mgmt,
1670                                        size_t len)
1671 {
1672         u16 reason_code;
1673         DECLARE_MAC_BUF(mac);
1674
1675         if (len < 24 + 2) {
1676                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1677                        "received from %s - ignored\n",
1678                        dev->name, len, print_mac(mac, mgmt->sa));
1679                 return;
1680         }
1681
1682         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1683                 printk(KERN_DEBUG "%s: disassociation frame received from "
1684                        "unknown AP (SA=%s BSSID=%s) - "
1685                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1686                        print_mac(mac, mgmt->bssid));
1687                 return;
1688         }
1689
1690         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1691
1692         printk(KERN_DEBUG "%s: RX disassociation from %s"
1693                " (reason=%d)\n",
1694                dev->name, print_mac(mac, mgmt->sa), reason_code);
1695
1696         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1697                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1698
1699         if (ifsta->state == IEEE80211_ASSOCIATED) {
1700                 ifsta->state = IEEE80211_ASSOCIATE;
1701                 mod_timer(&ifsta->timer, jiffies +
1702                                       IEEE80211_RETRY_AUTH_INTERVAL);
1703         }
1704
1705         ieee80211_set_disassoc(dev, ifsta, 0);
1706 }
1707
1708
1709 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1710                                          struct ieee80211_if_sta *ifsta,
1711                                          struct ieee80211_mgmt *mgmt,
1712                                          size_t len,
1713                                          int reassoc)
1714 {
1715         struct ieee80211_local *local = sdata->local;
1716         struct net_device *dev = sdata->dev;
1717         struct ieee80211_supported_band *sband;
1718         struct sta_info *sta;
1719         u64 rates, basic_rates;
1720         u16 capab_info, status_code, aid;
1721         struct ieee802_11_elems elems;
1722         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1723         u8 *pos;
1724         int i, j;
1725         DECLARE_MAC_BUF(mac);
1726         bool have_higher_than_11mbit = false;
1727
1728         /* AssocResp and ReassocResp have identical structure, so process both
1729          * of them in this function. */
1730
1731         if (ifsta->state != IEEE80211_ASSOCIATE) {
1732                 printk(KERN_DEBUG "%s: association frame received from "
1733                        "%s, but not in associate state - ignored\n",
1734                        dev->name, print_mac(mac, mgmt->sa));
1735                 return;
1736         }
1737
1738         if (len < 24 + 6) {
1739                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1740                        "received from %s - ignored\n",
1741                        dev->name, len, print_mac(mac, mgmt->sa));
1742                 return;
1743         }
1744
1745         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1746                 printk(KERN_DEBUG "%s: association frame received from "
1747                        "unknown AP (SA=%s BSSID=%s) - "
1748                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1749                        print_mac(mac, mgmt->bssid));
1750                 return;
1751         }
1752
1753         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1754         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1755         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1756
1757         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1758                "status=%d aid=%d)\n",
1759                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1760                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1761
1762         if (status_code != WLAN_STATUS_SUCCESS) {
1763                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1764                        dev->name, status_code);
1765                 /* if this was a reassociation, ensure we try a "full"
1766                  * association next time. This works around some broken APs
1767                  * which do not correctly reject reassociation requests. */
1768                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1769                 return;
1770         }
1771
1772         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1773                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1774                        "set\n", dev->name, aid);
1775         aid &= ~(BIT(15) | BIT(14));
1776
1777         pos = mgmt->u.assoc_resp.variable;
1778         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1779
1780         if (!elems.supp_rates) {
1781                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1782                        dev->name);
1783                 return;
1784         }
1785
1786         printk(KERN_DEBUG "%s: associated\n", dev->name);
1787         ifsta->aid = aid;
1788         ifsta->ap_capab = capab_info;
1789
1790         kfree(ifsta->assocresp_ies);
1791         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1792         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1793         if (ifsta->assocresp_ies)
1794                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1795
1796         /* Add STA entry for the AP */
1797         sta = sta_info_get(local, ifsta->bssid);
1798         if (!sta) {
1799                 struct ieee80211_sta_bss *bss;
1800                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1801                 if (IS_ERR(sta)) {
1802                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1803                                " AP (error %ld)\n", dev->name, PTR_ERR(sta));
1804                         return;
1805                 }
1806                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1807                                            local->hw.conf.channel->center_freq,
1808                                            ifsta->ssid, ifsta->ssid_len);
1809                 if (bss) {
1810                         sta->last_rssi = bss->rssi;
1811                         sta->last_signal = bss->signal;
1812                         sta->last_noise = bss->noise;
1813                         ieee80211_rx_bss_put(dev, bss);
1814                 }
1815         }
1816
1817         sta->dev = dev;
1818         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1819                       WLAN_STA_AUTHORIZED;
1820
1821         rates = 0;
1822         basic_rates = 0;
1823         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1824
1825         for (i = 0; i < elems.supp_rates_len; i++) {
1826                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1827
1828                 if (rate > 110)
1829                         have_higher_than_11mbit = true;
1830
1831                 for (j = 0; j < sband->n_bitrates; j++) {
1832                         if (sband->bitrates[j].bitrate == rate)
1833                                 rates |= BIT(j);
1834                         if (elems.supp_rates[i] & 0x80)
1835                                 basic_rates |= BIT(j);
1836                 }
1837         }
1838
1839         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1840                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1841
1842                 if (rate > 110)
1843                         have_higher_than_11mbit = true;
1844
1845                 for (j = 0; j < sband->n_bitrates; j++) {
1846                         if (sband->bitrates[j].bitrate == rate)
1847                                 rates |= BIT(j);
1848                         if (elems.ext_supp_rates[i] & 0x80)
1849                                 basic_rates |= BIT(j);
1850                 }
1851         }
1852
1853         sta->supp_rates[local->hw.conf.channel->band] = rates;
1854         sdata->basic_rates = basic_rates;
1855
1856         /* cf. IEEE 802.11 9.2.12 */
1857         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1858             have_higher_than_11mbit)
1859                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1860         else
1861                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1862
1863         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1864             local->ops->conf_ht) {
1865                 struct ieee80211_ht_bss_info bss_info;
1866
1867                 ieee80211_ht_cap_ie_to_ht_info(
1868                                 (struct ieee80211_ht_cap *)
1869                                 elems.ht_cap_elem, &sta->ht_info);
1870                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1871                                 (struct ieee80211_ht_addt_info *)
1872                                 elems.ht_info_elem, &bss_info);
1873                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1874         }
1875
1876         rate_control_rate_init(sta, local);
1877
1878         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1879                 sta->flags |= WLAN_STA_WME;
1880                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1881                                          elems.wmm_param_len);
1882         }
1883
1884         /* set AID, ieee80211_set_associated() will tell the driver */
1885         bss_conf->aid = aid;
1886         ieee80211_set_associated(dev, ifsta, 1);
1887
1888         sta_info_put(sta);
1889
1890         ieee80211_associated(dev, ifsta);
1891 }
1892
1893
1894 /* Caller must hold local->sta_bss_lock */
1895 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1896                                         struct ieee80211_sta_bss *bss)
1897 {
1898         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1899         u8 hash_idx;
1900 #ifdef CONFIG_MAC80211_MESH
1901         if (bss->mesh_cfg)
1902                 hash_idx = mesh_id_hash(bss->mesh_id, bss->mesh_id_len);
1903         else
1904 #endif
1905                 hash_idx = STA_HASH(bss->bssid);
1906         bss->hnext = local->sta_bss_hash[hash_idx];
1907         local->sta_bss_hash[hash_idx] = bss;
1908 }
1909
1910
1911 /* Caller must hold local->sta_bss_lock */
1912 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1913                                         struct ieee80211_sta_bss *bss)
1914 {
1915         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1916         struct ieee80211_sta_bss *b, *prev = NULL;
1917         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1918         while (b) {
1919                 if (b == bss) {
1920                         if (!prev)
1921                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1922                                         bss->hnext;
1923                         else
1924                                 prev->hnext = bss->hnext;
1925                         break;
1926                 }
1927                 prev = b;
1928                 b = b->hnext;
1929         }
1930 }
1931
1932
1933 static struct ieee80211_sta_bss *
1934 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1935                      u8 *ssid, u8 ssid_len)
1936 {
1937         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1938         struct ieee80211_sta_bss *bss;
1939
1940         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1941         if (!bss)
1942                 return NULL;
1943         atomic_inc(&bss->users);
1944         atomic_inc(&bss->users);
1945         memcpy(bss->bssid, bssid, ETH_ALEN);
1946         bss->freq = freq;
1947         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1948                 memcpy(bss->ssid, ssid, ssid_len);
1949                 bss->ssid_len = ssid_len;
1950         }
1951
1952         spin_lock_bh(&local->sta_bss_lock);
1953         /* TODO: order by RSSI? */
1954         list_add_tail(&bss->list, &local->sta_bss_list);
1955         __ieee80211_rx_bss_hash_add(dev, bss);
1956         spin_unlock_bh(&local->sta_bss_lock);
1957         return bss;
1958 }
1959
1960 static struct ieee80211_sta_bss *
1961 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1962                      u8 *ssid, u8 ssid_len)
1963 {
1964         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1965         struct ieee80211_sta_bss *bss;
1966
1967         spin_lock_bh(&local->sta_bss_lock);
1968         bss = local->sta_bss_hash[STA_HASH(bssid)];
1969         while (bss) {
1970                 if (!bss->mesh_cfg && !memcmp(bss->bssid, bssid, ETH_ALEN) &&
1971                     bss->freq == freq &&
1972                     bss->ssid_len == ssid_len &&
1973                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1974                         atomic_inc(&bss->users);
1975                         break;
1976                 }
1977                 bss = bss->hnext;
1978         }
1979         spin_unlock_bh(&local->sta_bss_lock);
1980         return bss;
1981 }
1982
1983 #ifdef CONFIG_MAC80211_MESH
1984 static struct ieee80211_sta_bss *
1985 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
1986                           u8 *mesh_cfg, int freq)
1987 {
1988         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1989         struct ieee80211_sta_bss *bss;
1990
1991         spin_lock_bh(&local->sta_bss_lock);
1992         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
1993         while (bss) {
1994                 if (bss->mesh_cfg &&
1995                     !memcmp(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN) &&
1996                     bss->freq == freq &&
1997                     mesh_id_len == bss->mesh_id_len &&
1998                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
1999                                                  mesh_id_len))) {
2000                         atomic_inc(&bss->users);
2001                         break;
2002                 }
2003                 bss = bss->hnext;
2004         }
2005         spin_unlock_bh(&local->sta_bss_lock);
2006         return bss;
2007 }
2008
2009 static struct ieee80211_sta_bss *
2010 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2011                           u8 *mesh_cfg, int freq)
2012 {
2013         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2014         struct ieee80211_sta_bss *bss;
2015
2016         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2017         if (!bss)
2018                 return NULL;
2019
2020         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2021         if (!bss->mesh_cfg) {
2022                 kfree(bss);
2023                 return NULL;
2024         }
2025
2026         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2027                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2028                 if (!bss->mesh_id) {
2029                         kfree(bss->mesh_cfg);
2030                         kfree(bss);
2031                         return NULL;
2032                 }
2033                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2034         }
2035
2036         atomic_inc(&bss->users);
2037         atomic_inc(&bss->users);
2038         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2039         bss->mesh_id_len = mesh_id_len;
2040         bss->freq = freq;
2041         spin_lock_bh(&local->sta_bss_lock);
2042         /* TODO: order by RSSI? */
2043         list_add_tail(&bss->list, &local->sta_bss_list);
2044         __ieee80211_rx_bss_hash_add(dev, bss);
2045         spin_unlock_bh(&local->sta_bss_lock);
2046         return bss;
2047 }
2048 #endif
2049
2050 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2051 {
2052         kfree(bss->wpa_ie);
2053         kfree(bss->rsn_ie);
2054         kfree(bss->wmm_ie);
2055         kfree(bss->ht_ie);
2056 #ifdef CONFIG_MAC80211_MESH
2057         kfree(bss->mesh_id);
2058         kfree(bss->mesh_cfg);
2059 #endif
2060         kfree(bss);
2061 }
2062
2063
2064 static void ieee80211_rx_bss_put(struct net_device *dev,
2065                                  struct ieee80211_sta_bss *bss)
2066 {
2067         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2068         if (!atomic_dec_and_test(&bss->users))
2069                 return;
2070
2071         spin_lock_bh(&local->sta_bss_lock);
2072         __ieee80211_rx_bss_hash_del(dev, bss);
2073         list_del(&bss->list);
2074         spin_unlock_bh(&local->sta_bss_lock);
2075         ieee80211_rx_bss_free(bss);
2076 }
2077
2078
2079 void ieee80211_rx_bss_list_init(struct net_device *dev)
2080 {
2081         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2082         spin_lock_init(&local->sta_bss_lock);
2083         INIT_LIST_HEAD(&local->sta_bss_list);
2084 }
2085
2086
2087 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2088 {
2089         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2090         struct ieee80211_sta_bss *bss, *tmp;
2091
2092         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2093                 ieee80211_rx_bss_put(dev, bss);
2094 }
2095
2096
2097 static int ieee80211_sta_join_ibss(struct net_device *dev,
2098                                    struct ieee80211_if_sta *ifsta,
2099                                    struct ieee80211_sta_bss *bss)
2100 {
2101         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2102         int res, rates, i, j;
2103         struct sk_buff *skb;
2104         struct ieee80211_mgmt *mgmt;
2105         struct ieee80211_tx_control control;
2106         struct rate_selection ratesel;
2107         u8 *pos;
2108         struct ieee80211_sub_if_data *sdata;
2109         struct ieee80211_supported_band *sband;
2110
2111         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2112
2113         /* Remove possible STA entries from other IBSS networks. */
2114         sta_info_flush(local, NULL);
2115
2116         if (local->ops->reset_tsf) {
2117                 /* Reset own TSF to allow time synchronization work. */
2118                 local->ops->reset_tsf(local_to_hw(local));
2119         }
2120         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2121         res = ieee80211_if_config(dev);
2122         if (res)
2123                 return res;
2124
2125         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2126
2127         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2128         sdata->drop_unencrypted = bss->capability &
2129                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2130
2131         res = ieee80211_set_freq(local, bss->freq);
2132
2133         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2134                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2135                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2136                 return -1;
2137         }
2138
2139         /* Set beacon template */
2140         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2141         do {
2142                 if (!skb)
2143                         break;
2144
2145                 skb_reserve(skb, local->hw.extra_tx_headroom);
2146
2147                 mgmt = (struct ieee80211_mgmt *)
2148                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2149                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2150                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2151                                                    IEEE80211_STYPE_BEACON);
2152                 memset(mgmt->da, 0xff, ETH_ALEN);
2153                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2154                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2155                 mgmt->u.beacon.beacon_int =
2156                         cpu_to_le16(local->hw.conf.beacon_int);
2157                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2158
2159                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2160                 *pos++ = WLAN_EID_SSID;
2161                 *pos++ = ifsta->ssid_len;
2162                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2163
2164                 rates = bss->supp_rates_len;
2165                 if (rates > 8)
2166                         rates = 8;
2167                 pos = skb_put(skb, 2 + rates);
2168                 *pos++ = WLAN_EID_SUPP_RATES;
2169                 *pos++ = rates;
2170                 memcpy(pos, bss->supp_rates, rates);
2171
2172                 if (bss->band == IEEE80211_BAND_2GHZ) {
2173                         pos = skb_put(skb, 2 + 1);
2174                         *pos++ = WLAN_EID_DS_PARAMS;
2175                         *pos++ = 1;
2176                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2177                 }
2178
2179                 pos = skb_put(skb, 2 + 2);
2180                 *pos++ = WLAN_EID_IBSS_PARAMS;
2181                 *pos++ = 2;
2182                 /* FIX: set ATIM window based on scan results */
2183                 *pos++ = 0;
2184                 *pos++ = 0;
2185
2186                 if (bss->supp_rates_len > 8) {
2187                         rates = bss->supp_rates_len - 8;
2188                         pos = skb_put(skb, 2 + rates);
2189                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2190                         *pos++ = rates;
2191                         memcpy(pos, &bss->supp_rates[8], rates);
2192                 }
2193
2194                 memset(&control, 0, sizeof(control));
2195                 rate_control_get_rate(dev, sband, skb, &ratesel);
2196                 if (!ratesel.rate) {
2197                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2198                                "for IBSS beacon\n", dev->name);
2199                         break;
2200                 }
2201                 control.vif = &sdata->vif;
2202                 control.tx_rate = ratesel.rate;
2203                 if (sdata->bss_conf.use_short_preamble &&
2204                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2205                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2206                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2207                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2208                 control.retry_limit = 1;
2209
2210                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2211                 if (ifsta->probe_resp) {
2212                         mgmt = (struct ieee80211_mgmt *)
2213                                 ifsta->probe_resp->data;
2214                         mgmt->frame_control =
2215                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2216                                              IEEE80211_STYPE_PROBE_RESP);
2217                 } else {
2218                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2219                                "template for IBSS\n", dev->name);
2220                 }
2221
2222                 if (local->ops->beacon_update &&
2223                     local->ops->beacon_update(local_to_hw(local),
2224                                              skb, &control) == 0) {
2225                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2226                                "template\n", dev->name);
2227                         skb = NULL;
2228                 }
2229
2230                 rates = 0;
2231                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2232                 for (i = 0; i < bss->supp_rates_len; i++) {
2233                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2234                         for (j = 0; j < sband->n_bitrates; j++)
2235                                 if (sband->bitrates[j].bitrate == bitrate)
2236                                         rates |= BIT(j);
2237                 }
2238                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2239         } while (0);
2240
2241         if (skb) {
2242                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2243                        "template\n", dev->name);
2244                 dev_kfree_skb(skb);
2245         }
2246
2247         ifsta->state = IEEE80211_IBSS_JOINED;
2248         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2249
2250         ieee80211_rx_bss_put(dev, bss);
2251
2252         return res;
2253 }
2254
2255 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2256                             struct ieee802_11_elems *elems,
2257                             enum ieee80211_band band)
2258 {
2259         struct ieee80211_supported_band *sband;
2260         struct ieee80211_rate *bitrates;
2261         size_t num_rates;
2262         u64 supp_rates;
2263         int i, j;
2264         sband = local->hw.wiphy->bands[band];
2265
2266         if (!sband) {
2267                 WARN_ON(1);
2268                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2269         }
2270
2271         bitrates = sband->bitrates;
2272         num_rates = sband->n_bitrates;
2273         supp_rates = 0;
2274         for (i = 0; i < elems->supp_rates_len +
2275                      elems->ext_supp_rates_len; i++) {
2276                 u8 rate = 0;
2277                 int own_rate;
2278                 if (i < elems->supp_rates_len)
2279                         rate = elems->supp_rates[i];
2280                 else if (elems->ext_supp_rates)
2281                         rate = elems->ext_supp_rates
2282                                 [i - elems->supp_rates_len];
2283                 own_rate = 5 * (rate & 0x7f);
2284                 for (j = 0; j < num_rates; j++)
2285                         if (bitrates[j].bitrate == own_rate)
2286                                 supp_rates |= BIT(j);
2287         }
2288         return supp_rates;
2289 }
2290
2291
2292 static void ieee80211_rx_bss_info(struct net_device *dev,
2293                                   struct ieee80211_mgmt *mgmt,
2294                                   size_t len,
2295                                   struct ieee80211_rx_status *rx_status,
2296                                   int beacon)
2297 {
2298         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2299         struct ieee802_11_elems elems;
2300         size_t baselen;
2301         int freq, clen;
2302         struct ieee80211_sta_bss *bss;
2303         struct sta_info *sta;
2304         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2305         u64 beacon_timestamp, rx_timestamp;
2306         DECLARE_MAC_BUF(mac);
2307         DECLARE_MAC_BUF(mac2);
2308
2309         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2310                 return; /* ignore ProbeResp to foreign address */
2311
2312 #if 0
2313         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2314                dev->name, beacon ? "Beacon" : "Probe Response",
2315                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2316 #endif
2317
2318         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2319         if (baselen > len)
2320                 return;
2321
2322         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2323         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2324
2325 #ifdef CONFIG_MAC80211_MESH
2326         if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT && elems.mesh_id
2327                         && elems.mesh_config)
2328                 if (mesh_matches_local(&elems, dev)) {
2329                         u64 rates = ieee80211_sta_get_rates(local, &elems,
2330                                                         rx_status->band);
2331                         mesh_neighbour_update(mgmt->sa, rates, dev,
2332                                 mesh_peer_accepts_plinks(&elems, dev));
2333                 }
2334 #endif
2335
2336         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2337             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2338             (sta = sta_info_get(local, mgmt->sa))) {
2339                 u64 prev_rates;
2340                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2341                                                         rx_status->band);
2342
2343                 prev_rates = sta->supp_rates[rx_status->band];
2344                 sta->supp_rates[rx_status->band] &= supp_rates;
2345                 if (sta->supp_rates[rx_status->band] == 0) {
2346                         /* No matching rates - this should not really happen.
2347                          * Make sure that at least one rate is marked
2348                          * supported to avoid issues with TX rate ctrl. */
2349                         sta->supp_rates[rx_status->band] =
2350                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2351                 }
2352                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2353                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2354                                "%s based on beacon info (0x%llx & 0x%llx -> "
2355                                "0x%llx)\n",
2356                                dev->name, print_mac(mac, sta->addr),
2357                                (unsigned long long) prev_rates,
2358                                (unsigned long long) supp_rates,
2359                                (unsigned long long) sta->supp_rates[rx_status->band]);
2360                 }
2361                 sta_info_put(sta);
2362         }
2363
2364         if (elems.ds_params && elems.ds_params_len == 1)
2365                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2366         else
2367                 freq = rx_status->freq;
2368
2369 #ifdef CONFIG_MAC80211_MESH
2370         if (elems.mesh_config)
2371                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2372                                 elems.mesh_id_len, elems.mesh_config, freq);
2373         else
2374 #endif
2375                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2376                                            elems.ssid, elems.ssid_len);
2377         if (!bss) {
2378 #ifdef CONFIG_MAC80211_MESH
2379                 if (elems.mesh_config)
2380                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2381                                 elems.mesh_id_len, elems.mesh_config, freq);
2382                 else
2383 #endif
2384                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2385                                                    elems.ssid, elems.ssid_len);
2386                 if (!bss)
2387                         return;
2388         } else {
2389 #if 0
2390                 /* TODO: order by RSSI? */
2391                 spin_lock_bh(&local->sta_bss_lock);
2392                 list_move_tail(&bss->list, &local->sta_bss_list);
2393                 spin_unlock_bh(&local->sta_bss_lock);
2394 #endif
2395         }
2396
2397         bss->band = rx_status->band;
2398
2399         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2400             bss->probe_resp && beacon) {
2401                 /* STA mode:
2402                  * Do not allow beacon to override data from Probe Response. */
2403                 ieee80211_rx_bss_put(dev, bss);
2404                 return;
2405         }
2406
2407         /* save the ERP value so that it is available at association time */
2408         if (elems.erp_info && elems.erp_info_len >= 1) {
2409                 bss->erp_value = elems.erp_info[0];
2410                 bss->has_erp_value = 1;
2411         }
2412
2413         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2414         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2415
2416         bss->supp_rates_len = 0;
2417         if (elems.supp_rates) {
2418                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2419                 if (clen > elems.supp_rates_len)
2420                         clen = elems.supp_rates_len;
2421                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2422                        clen);
2423                 bss->supp_rates_len += clen;
2424         }
2425         if (elems.ext_supp_rates) {
2426                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2427                 if (clen > elems.ext_supp_rates_len)
2428                         clen = elems.ext_supp_rates_len;
2429                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2430                        elems.ext_supp_rates, clen);
2431                 bss->supp_rates_len += clen;
2432         }
2433
2434         if (elems.wpa &&
2435             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2436              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2437                 kfree(bss->wpa_ie);
2438                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2439                 if (bss->wpa_ie) {
2440                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2441                         bss->wpa_ie_len = elems.wpa_len + 2;
2442                 } else
2443                         bss->wpa_ie_len = 0;
2444         } else if (!elems.wpa && bss->wpa_ie) {
2445                 kfree(bss->wpa_ie);
2446                 bss->wpa_ie = NULL;
2447                 bss->wpa_ie_len = 0;
2448         }
2449
2450         if (elems.rsn &&
2451             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2452              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2453                 kfree(bss->rsn_ie);
2454                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2455                 if (bss->rsn_ie) {
2456                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2457                         bss->rsn_ie_len = elems.rsn_len + 2;
2458                 } else
2459                         bss->rsn_ie_len = 0;
2460         } else if (!elems.rsn && bss->rsn_ie) {
2461                 kfree(bss->rsn_ie);
2462                 bss->rsn_ie = NULL;
2463                 bss->rsn_ie_len = 0;
2464         }
2465
2466         if (elems.wmm_param &&
2467             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2468              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2469                 kfree(bss->wmm_ie);
2470                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2471                 if (bss->wmm_ie) {
2472                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2473                                elems.wmm_param_len + 2);
2474                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2475                 } else
2476                         bss->wmm_ie_len = 0;
2477         } else if (!elems.wmm_param && bss->wmm_ie) {
2478                 kfree(bss->wmm_ie);
2479                 bss->wmm_ie = NULL;
2480                 bss->wmm_ie_len = 0;
2481         }
2482         if (elems.ht_cap_elem &&
2483             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2484              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2485                 kfree(bss->ht_ie);
2486                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2487                 if (bss->ht_ie) {
2488                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2489                                elems.ht_cap_elem_len + 2);
2490                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2491                 } else
2492                         bss->ht_ie_len = 0;
2493         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2494                 kfree(bss->ht_ie);
2495                 bss->ht_ie = NULL;
2496                 bss->ht_ie_len = 0;
2497         }
2498
2499         bss->timestamp = beacon_timestamp;
2500         bss->last_update = jiffies;
2501         bss->rssi = rx_status->ssi;
2502         bss->signal = rx_status->signal;
2503         bss->noise = rx_status->noise;
2504         if (!beacon)
2505                 bss->probe_resp++;
2506
2507         /* check if we need to merge IBSS */
2508         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2509             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2510             bss->capability & WLAN_CAPABILITY_IBSS &&
2511             bss->freq == local->oper_channel->center_freq &&
2512             elems.ssid_len == sdata->u.sta.ssid_len &&
2513             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2514                 if (rx_status->flag & RX_FLAG_TSFT) {
2515                         /* in order for correct IBSS merging we need mactime
2516                          *
2517                          * since mactime is defined as the time the first data
2518                          * symbol of the frame hits the PHY, and the timestamp
2519                          * of the beacon is defined as "the time that the data
2520                          * symbol containing the first bit of the timestamp is
2521                          * transmitted to the PHY plus the transmitting STA’s
2522                          * delays through its local PHY from the MAC-PHY
2523                          * interface to its interface with the WM"
2524                          * (802.11 11.1.2) - equals the time this bit arrives at
2525                          * the receiver - we have to take into account the
2526                          * offset between the two.
2527                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2528                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2529                          */
2530                         int rate = local->hw.wiphy->bands[rx_status->band]->
2531                                         bitrates[rx_status->rate_idx].bitrate;
2532                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2533                 } else if (local && local->ops && local->ops->get_tsf)
2534                         /* second best option: get current TSF */
2535                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2536                 else
2537                         /* can't merge without knowing the TSF */
2538                         rx_timestamp = -1LLU;
2539 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2540                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2541                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2542                        print_mac(mac, mgmt->sa),
2543                        print_mac(mac2, mgmt->bssid),
2544                        (unsigned long long)rx_timestamp,
2545                        (unsigned long long)beacon_timestamp,
2546                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2547                        jiffies);
2548 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2549                 if (beacon_timestamp > rx_timestamp) {
2550 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2551                         if (net_ratelimit())
2552 #endif
2553                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2554                                        "local TSF - IBSS merge with BSSID %s\n",
2555                                        dev->name, print_mac(mac, mgmt->bssid));
2556                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2557                         ieee80211_ibss_add_sta(dev, NULL,
2558                                                mgmt->bssid, mgmt->sa);
2559                 }
2560         }
2561
2562         ieee80211_rx_bss_put(dev, bss);
2563 }
2564
2565
2566 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2567                                          struct ieee80211_mgmt *mgmt,
2568                                          size_t len,
2569                                          struct ieee80211_rx_status *rx_status)
2570 {
2571         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2572 }
2573
2574
2575 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2576                                      struct ieee80211_mgmt *mgmt,
2577                                      size_t len,
2578                                      struct ieee80211_rx_status *rx_status)
2579 {
2580         struct ieee80211_sub_if_data *sdata;
2581         struct ieee80211_if_sta *ifsta;
2582         size_t baselen;
2583         struct ieee802_11_elems elems;
2584         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2585         struct ieee80211_conf *conf = &local->hw.conf;
2586         u32 changed = 0;
2587
2588         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2589
2590         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2591         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2592                 return;
2593         ifsta = &sdata->u.sta;
2594
2595         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2596             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2597                 return;
2598
2599         /* Process beacon from the current BSS */
2600         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2601         if (baselen > len)
2602                 return;
2603
2604         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2605
2606         if (elems.erp_info && elems.erp_info_len >= 1)
2607                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2608
2609         if (elems.ht_cap_elem && elems.ht_info_elem &&
2610             elems.wmm_param && local->ops->conf_ht &&
2611             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2612                 struct ieee80211_ht_bss_info bss_info;
2613
2614                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2615                                 (struct ieee80211_ht_addt_info *)
2616                                 elems.ht_info_elem, &bss_info);
2617                 /* check if AP changed bss inforamation */
2618                 if ((conf->ht_bss_conf.primary_channel !=
2619                      bss_info.primary_channel) ||
2620                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2621                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2622                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2623                                                 &bss_info);
2624         }
2625
2626         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2627                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2628                                          elems.wmm_param_len);
2629         }
2630
2631         ieee80211_bss_info_change_notify(sdata, changed);
2632 }
2633
2634
2635 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2636                                         struct ieee80211_if_sta *ifsta,
2637                                         struct ieee80211_mgmt *mgmt,
2638                                         size_t len,
2639                                         struct ieee80211_rx_status *rx_status)
2640 {
2641         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2642         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2643         int tx_last_beacon;
2644         struct sk_buff *skb;
2645         struct ieee80211_mgmt *resp;
2646         u8 *pos, *end;
2647         DECLARE_MAC_BUF(mac);
2648 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2649         DECLARE_MAC_BUF(mac2);
2650         DECLARE_MAC_BUF(mac3);
2651 #endif
2652
2653         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2654             ifsta->state != IEEE80211_IBSS_JOINED ||
2655             len < 24 + 2 || !ifsta->probe_resp)
2656                 return;
2657
2658         if (local->ops->tx_last_beacon)
2659                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2660         else
2661                 tx_last_beacon = 1;
2662
2663 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2664         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2665                "%s (tx_last_beacon=%d)\n",
2666                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2667                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2668 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2669
2670         if (!tx_last_beacon)
2671                 return;
2672
2673         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2674             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2675                 return;
2676
2677         end = ((u8 *) mgmt) + len;
2678         pos = mgmt->u.probe_req.variable;
2679         if (pos[0] != WLAN_EID_SSID ||
2680             pos + 2 + pos[1] > end) {
2681                 if (net_ratelimit()) {
2682                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2683                                "from %s\n",
2684                                dev->name, print_mac(mac, mgmt->sa));
2685                 }
2686                 return;
2687         }
2688         if (pos[1] != 0 &&
2689             (pos[1] != ifsta->ssid_len ||
2690              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2691                 /* Ignore ProbeReq for foreign SSID */
2692                 return;
2693         }
2694
2695         /* Reply with ProbeResp */
2696         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2697         if (!skb)
2698                 return;
2699
2700         resp = (struct ieee80211_mgmt *) skb->data;
2701         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2702 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2703         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2704                dev->name, print_mac(mac, resp->da));
2705 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2706         ieee80211_sta_tx(dev, skb, 0);
2707 }
2708
2709 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2710                                      struct ieee80211_if_sta *ifsta,
2711                                      struct ieee80211_mgmt *mgmt,
2712                                      size_t len,
2713                                      struct ieee80211_rx_status *rx_status)
2714 {
2715 #ifdef CONFIG_MAC80211_MESH
2716         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2717 #endif
2718
2719         if (len < IEEE80211_MIN_ACTION_SIZE)
2720                 return;
2721
2722         switch (mgmt->u.action.category) {
2723         case WLAN_CATEGORY_BACK:
2724                 switch (mgmt->u.action.u.addba_req.action_code) {
2725                 case WLAN_ACTION_ADDBA_REQ:
2726                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2727                                    sizeof(mgmt->u.action.u.addba_req)))
2728                                 break;
2729                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2730                         break;
2731                 case WLAN_ACTION_ADDBA_RESP:
2732                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2733                                    sizeof(mgmt->u.action.u.addba_resp)))
2734                                 break;
2735                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2736                         break;
2737                 case WLAN_ACTION_DELBA:
2738                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2739                                    sizeof(mgmt->u.action.u.delba)))
2740                                 break;
2741                         ieee80211_sta_process_delba(dev, mgmt, len);
2742                         break;
2743                 default:
2744                         if (net_ratelimit())
2745                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2746                                         dev->name);
2747                         break;
2748                 }
2749                 break;
2750 #ifdef CONFIG_MAC80211_MESH
2751         case PLINK_CATEGORY:
2752                 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT)
2753                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2754                 break;
2755
2756         case MESH_PATH_SEL_CATEGORY:
2757                 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT)
2758                         mesh_rx_path_sel_frame(dev, mgmt, len);
2759                 break;
2760 #endif
2761         default:
2762                 if (net_ratelimit())
2763                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
2764                         "category=%d\n", dev->name, mgmt->u.action.category);
2765                 break;
2766         }
2767 }
2768
2769 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2770                            struct ieee80211_rx_status *rx_status)
2771 {
2772         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2773         struct ieee80211_sub_if_data *sdata;
2774         struct ieee80211_if_sta *ifsta;
2775         struct ieee80211_mgmt *mgmt;
2776         u16 fc;
2777
2778         if (skb->len < 24)
2779                 goto fail;
2780
2781         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2782         ifsta = &sdata->u.sta;
2783
2784         mgmt = (struct ieee80211_mgmt *) skb->data;
2785         fc = le16_to_cpu(mgmt->frame_control);
2786
2787         switch (fc & IEEE80211_FCTL_STYPE) {
2788         case IEEE80211_STYPE_PROBE_REQ:
2789         case IEEE80211_STYPE_PROBE_RESP:
2790         case IEEE80211_STYPE_BEACON:
2791         case IEEE80211_STYPE_ACTION:
2792                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2793         case IEEE80211_STYPE_AUTH:
2794         case IEEE80211_STYPE_ASSOC_RESP:
2795         case IEEE80211_STYPE_REASSOC_RESP:
2796         case IEEE80211_STYPE_DEAUTH:
2797         case IEEE80211_STYPE_DISASSOC:
2798                 skb_queue_tail(&ifsta->skb_queue, skb);
2799                 queue_work(local->hw.workqueue, &ifsta->work);
2800                 return;
2801         default:
2802                 printk(KERN_DEBUG "%s: received unknown management frame - "
2803                        "stype=%d\n", dev->name,
2804                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2805                 break;
2806         }
2807
2808  fail:
2809         kfree_skb(skb);
2810 }
2811
2812
2813 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2814                                          struct sk_buff *skb)
2815 {
2816         struct ieee80211_rx_status *rx_status;
2817         struct ieee80211_sub_if_data *sdata;
2818         struct ieee80211_if_sta *ifsta;
2819         struct ieee80211_mgmt *mgmt;
2820         u16 fc;
2821
2822         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2823         ifsta = &sdata->u.sta;
2824
2825         rx_status = (struct ieee80211_rx_status *) skb->cb;
2826         mgmt = (struct ieee80211_mgmt *) skb->data;
2827         fc = le16_to_cpu(mgmt->frame_control);
2828
2829         switch (fc & IEEE80211_FCTL_STYPE) {
2830         case IEEE80211_STYPE_PROBE_REQ:
2831                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2832                                             rx_status);
2833                 break;
2834         case IEEE80211_STYPE_PROBE_RESP:
2835                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2836                 break;
2837         case IEEE80211_STYPE_BEACON:
2838                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2839                 break;
2840         case IEEE80211_STYPE_AUTH:
2841                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2842                 break;
2843         case IEEE80211_STYPE_ASSOC_RESP:
2844                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2845                 break;
2846         case IEEE80211_STYPE_REASSOC_RESP:
2847                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2848                 break;
2849         case IEEE80211_STYPE_DEAUTH:
2850                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2851                 break;
2852         case IEEE80211_STYPE_DISASSOC:
2853                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2854                 break;
2855         case IEEE80211_STYPE_ACTION:
2856                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
2857                 break;
2858         }
2859
2860         kfree_skb(skb);
2861 }
2862
2863
2864 ieee80211_rx_result
2865 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2866                       struct ieee80211_rx_status *rx_status)
2867 {
2868         struct ieee80211_mgmt *mgmt;
2869         u16 fc;
2870
2871         if (skb->len < 2)
2872                 return RX_DROP_UNUSABLE;
2873
2874         mgmt = (struct ieee80211_mgmt *) skb->data;
2875         fc = le16_to_cpu(mgmt->frame_control);
2876
2877         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2878                 return RX_CONTINUE;
2879
2880         if (skb->len < 24)
2881                 return RX_DROP_MONITOR;
2882
2883         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2884                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2885                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2886                                                      skb->len, rx_status);
2887                         dev_kfree_skb(skb);
2888                         return RX_QUEUED;
2889                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2890                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2891                                                  rx_status);
2892                         dev_kfree_skb(skb);
2893                         return RX_QUEUED;
2894                 }
2895         }
2896         return RX_CONTINUE;
2897 }
2898
2899
2900 static int ieee80211_sta_active_ibss(struct net_device *dev)
2901 {
2902         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2903         int active = 0;
2904         struct sta_info *sta;
2905
2906         read_lock_bh(&local->sta_lock);
2907         list_for_each_entry(sta, &local->sta_list, list) {
2908                 if (sta->dev == dev &&
2909                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2910                                jiffies)) {
2911                         active++;
2912                         break;
2913                 }
2914         }
2915         read_unlock_bh(&local->sta_lock);
2916
2917         return active;
2918 }
2919
2920
2921 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
2922 {
2923         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2924         struct sta_info *sta, *tmp;
2925         LIST_HEAD(tmp_list);
2926         DECLARE_MAC_BUF(mac);
2927
2928         write_lock_bh(&local->sta_lock);
2929         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2930                 if (time_after(jiffies, sta->last_rx + exp_time)) {
2931                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2932                                dev->name, print_mac(mac, sta->addr));
2933                         __sta_info_get(sta);
2934                         sta_info_remove(sta);
2935                         list_add(&sta->list, &tmp_list);
2936                 }
2937         write_unlock_bh(&local->sta_lock);
2938
2939         list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2940                 sta_info_free(sta);
2941                 sta_info_put(sta);
2942         }
2943 }
2944
2945
2946 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2947                                      struct ieee80211_if_sta *ifsta)
2948 {
2949         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2950
2951         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
2952         if (ieee80211_sta_active_ibss(dev))
2953                 return;
2954
2955         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2956                "IBSS networks with same SSID (merge)\n", dev->name);
2957         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2958 }
2959
2960
2961 #ifdef CONFIG_MAC80211_MESH
2962 static void ieee80211_mesh_housekeeping(struct net_device *dev,
2963                            struct ieee80211_if_sta *ifsta)
2964 {
2965         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2966         bool free_plinks;
2967
2968         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
2969         mesh_path_expire(dev);
2970
2971         free_plinks = mesh_plink_availables(sdata);
2972         if (free_plinks != sdata->u.sta.accepting_plinks)
2973                 ieee80211_if_config_beacon(dev);
2974
2975         mod_timer(&ifsta->timer, jiffies +
2976                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
2977 }
2978
2979
2980 void ieee80211_start_mesh(struct net_device *dev)
2981 {
2982         struct ieee80211_if_sta *ifsta;
2983         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2984         ifsta = &sdata->u.sta;
2985         ifsta->state = IEEE80211_MESH_UP;
2986         ieee80211_sta_timer((unsigned long)sdata);
2987 }
2988 #endif
2989
2990
2991 void ieee80211_sta_timer(unsigned long data)
2992 {
2993         struct ieee80211_sub_if_data *sdata =
2994                 (struct ieee80211_sub_if_data *) data;
2995         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2996         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2997
2998         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2999         queue_work(local->hw.workqueue, &ifsta->work);
3000 }
3001
3002 void ieee80211_sta_work(struct work_struct *work)
3003 {
3004         struct ieee80211_sub_if_data *sdata =
3005                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3006         struct net_device *dev = sdata->dev;
3007         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3008         struct ieee80211_if_sta *ifsta;
3009         struct sk_buff *skb;
3010
3011         if (!netif_running(dev))
3012                 return;
3013
3014         if (local->sta_sw_scanning || local->sta_hw_scanning)
3015                 return;
3016
3017         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3018             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3019             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3020                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3021                        "(type=%d)\n", dev->name, sdata->vif.type);
3022                 return;
3023         }
3024         ifsta = &sdata->u.sta;
3025
3026         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3027                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3028
3029 #ifdef CONFIG_MAC80211_MESH
3030         if (ifsta->preq_queue_len && time_after(jiffies, ifsta->last_preq +
3031                 msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3032                 mesh_path_start_discovery(dev);
3033 #endif
3034
3035         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3036             ifsta->state != IEEE80211_ASSOCIATE &&
3037             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3038                 if (ifsta->scan_ssid_len)
3039                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3040                 else
3041                         ieee80211_sta_start_scan(dev, NULL, 0);
3042                 return;
3043         }
3044
3045         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3046                 if (ieee80211_sta_config_auth(dev, ifsta))
3047                         return;
3048                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3049         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3050                 return;
3051
3052         switch (ifsta->state) {
3053         case IEEE80211_DISABLED:
3054                 break;
3055         case IEEE80211_AUTHENTICATE:
3056                 ieee80211_authenticate(dev, ifsta);
3057                 break;
3058         case IEEE80211_ASSOCIATE:
3059                 ieee80211_associate(dev, ifsta);
3060                 break;
3061         case IEEE80211_ASSOCIATED:
3062                 ieee80211_associated(dev, ifsta);
3063                 break;
3064         case IEEE80211_IBSS_SEARCH:
3065                 ieee80211_sta_find_ibss(dev, ifsta);
3066                 break;
3067         case IEEE80211_IBSS_JOINED:
3068                 ieee80211_sta_merge_ibss(dev, ifsta);
3069                 break;
3070 #ifdef CONFIG_MAC80211_MESH
3071         case IEEE80211_MESH_UP:
3072                 ieee80211_mesh_housekeeping(dev, ifsta);
3073                 break;
3074 #endif
3075         default:
3076                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3077                        ifsta->state);
3078                 break;
3079         }
3080
3081         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3082                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3083                        "mixed-cell disabled - disassociate\n", dev->name);
3084
3085                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3086                 ieee80211_set_disassoc(dev, ifsta, 0);
3087         }
3088 }
3089
3090
3091 static void ieee80211_sta_reset_auth(struct net_device *dev,
3092                                      struct ieee80211_if_sta *ifsta)
3093 {
3094         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3095
3096         if (local->ops->reset_tsf) {
3097                 /* Reset own TSF to allow time synchronization work. */
3098                 local->ops->reset_tsf(local_to_hw(local));
3099         }
3100
3101         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3102
3103
3104         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3105                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3106         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3107                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3108         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3109                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3110         else
3111                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3112         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3113                ifsta->auth_alg);
3114         ifsta->auth_transaction = -1;
3115         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3116         ifsta->auth_tries = ifsta->assoc_tries = 0;
3117         netif_carrier_off(dev);
3118 }
3119
3120
3121 void ieee80211_sta_req_auth(struct net_device *dev,
3122                             struct ieee80211_if_sta *ifsta)
3123 {
3124         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3125         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3126
3127         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3128                 return;
3129
3130         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3131                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3132             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3133                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3134                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3135                 queue_work(local->hw.workqueue, &ifsta->work);
3136         }
3137 }
3138
3139 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3140                                     const char *ssid, int ssid_len)
3141 {
3142         int tmp, hidden_ssid;
3143
3144         if (ssid_len == ifsta->ssid_len &&
3145             !memcmp(ifsta->ssid, ssid, ssid_len))
3146                 return 1;
3147
3148         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3149                 return 0;
3150
3151         hidden_ssid = 1;
3152         tmp = ssid_len;
3153         while (tmp--) {
3154                 if (ssid[tmp] != '\0') {
3155                         hidden_ssid = 0;
3156                         break;
3157                 }
3158         }
3159
3160         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3161                 return 1;
3162
3163         if (ssid_len == 1 && ssid[0] == ' ')
3164                 return 1;
3165
3166         return 0;
3167 }
3168
3169 static int ieee80211_sta_config_auth(struct net_device *dev,
3170                                      struct ieee80211_if_sta *ifsta)
3171 {
3172         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3173         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3174         struct ieee80211_sta_bss *bss, *selected = NULL;
3175         int top_rssi = 0, freq;
3176
3177         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3178             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3179                 ifsta->state = IEEE80211_AUTHENTICATE;
3180                 ieee80211_sta_reset_auth(dev, ifsta);
3181                 return 0;
3182         }
3183
3184         spin_lock_bh(&local->sta_bss_lock);
3185         freq = local->oper_channel->center_freq;
3186         list_for_each_entry(bss, &local->sta_bss_list, list) {
3187                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3188                         continue;
3189
3190                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3191                     !!sdata->default_key)
3192                         continue;
3193
3194                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3195                     bss->freq != freq)
3196                         continue;
3197
3198                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3199                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3200                         continue;
3201
3202                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3203                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3204                         continue;
3205
3206                 if (!selected || top_rssi < bss->rssi) {
3207                         selected = bss;
3208                         top_rssi = bss->rssi;
3209                 }
3210         }
3211         if (selected)
3212                 atomic_inc(&selected->users);
3213         spin_unlock_bh(&local->sta_bss_lock);
3214
3215         if (selected) {
3216                 ieee80211_set_freq(local, selected->freq);
3217                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3218                         ieee80211_sta_set_ssid(dev, selected->ssid,
3219                                                selected->ssid_len);
3220                 ieee80211_sta_set_bssid(dev, selected->bssid);
3221                 ieee80211_rx_bss_put(dev, selected);
3222                 ifsta->state = IEEE80211_AUTHENTICATE;
3223                 ieee80211_sta_reset_auth(dev, ifsta);
3224                 return 0;
3225         } else {
3226                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3227                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3228                                 ieee80211_sta_start_scan(dev, NULL, 0);
3229                         else
3230                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3231                                                          ifsta->ssid_len);
3232                         ifsta->state = IEEE80211_AUTHENTICATE;
3233                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3234                 } else
3235                         ifsta->state = IEEE80211_DISABLED;
3236         }
3237         return -1;
3238 }
3239
3240
3241 static int ieee80211_sta_create_ibss(struct net_device *dev,
3242                                      struct ieee80211_if_sta *ifsta)
3243 {
3244         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3245         struct ieee80211_sta_bss *bss;
3246         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3247         struct ieee80211_supported_band *sband;
3248         u8 bssid[ETH_ALEN], *pos;
3249         int i;
3250         DECLARE_MAC_BUF(mac);
3251
3252 #if 0
3253         /* Easier testing, use fixed BSSID. */
3254         memset(bssid, 0xfe, ETH_ALEN);
3255 #else
3256         /* Generate random, not broadcast, locally administered BSSID. Mix in
3257          * own MAC address to make sure that devices that do not have proper
3258          * random number generator get different BSSID. */
3259         get_random_bytes(bssid, ETH_ALEN);
3260         for (i = 0; i < ETH_ALEN; i++)
3261                 bssid[i] ^= dev->dev_addr[i];
3262         bssid[0] &= ~0x01;
3263         bssid[0] |= 0x02;
3264 #endif
3265
3266         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3267                dev->name, print_mac(mac, bssid));
3268
3269         bss = ieee80211_rx_bss_add(dev, bssid,
3270                                    local->hw.conf.channel->center_freq,
3271                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3272         if (!bss)
3273                 return -ENOMEM;
3274
3275         bss->band = local->hw.conf.channel->band;
3276         sband = local->hw.wiphy->bands[bss->band];
3277
3278         if (local->hw.conf.beacon_int == 0)
3279                 local->hw.conf.beacon_int = 10000;
3280         bss->beacon_int = local->hw.conf.beacon_int;
3281         bss->last_update = jiffies;
3282         bss->capability = WLAN_CAPABILITY_IBSS;
3283         if (sdata->default_key) {
3284                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3285         } else
3286                 sdata->drop_unencrypted = 0;
3287         bss->supp_rates_len = sband->n_bitrates;
3288         pos = bss->supp_rates;
3289         for (i = 0; i < sband->n_bitrates; i++) {
3290                 int rate = sband->bitrates[i].bitrate;
3291                 *pos++ = (u8) (rate / 5);
3292         }
3293
3294         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3295 }
3296
3297
3298 static int ieee80211_sta_find_ibss(struct net_device *dev,
3299                                    struct ieee80211_if_sta *ifsta)
3300 {
3301         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3302         struct ieee80211_sta_bss *bss;
3303         int found = 0;
3304         u8 bssid[ETH_ALEN];
3305         int active_ibss;
3306         DECLARE_MAC_BUF(mac);
3307         DECLARE_MAC_BUF(mac2);
3308
3309         if (ifsta->ssid_len == 0)
3310                 return -EINVAL;
3311
3312         active_ibss = ieee80211_sta_active_ibss(dev);
3313 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3314         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3315                dev->name, active_ibss);
3316 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3317         spin_lock_bh(&local->sta_bss_lock);
3318         list_for_each_entry(bss, &local->sta_bss_list, list) {
3319                 if (ifsta->ssid_len != bss->ssid_len ||
3320                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3321                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3322                         continue;
3323 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3324                 printk(KERN_DEBUG "   bssid=%s found\n",
3325                        print_mac(mac, bss->bssid));
3326 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3327                 memcpy(bssid, bss->bssid, ETH_ALEN);
3328                 found = 1;
3329                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3330                         break;
3331         }
3332         spin_unlock_bh(&local->sta_bss_lock);
3333
3334 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3335         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3336                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3337 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3338         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3339             (bss = ieee80211_rx_bss_get(dev, bssid,
3340                                         local->hw.conf.channel->center_freq,
3341                                         ifsta->ssid, ifsta->ssid_len))) {
3342                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3343                        " based on configured SSID\n",
3344                        dev->name, print_mac(mac, bssid));
3345                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3346         }
3347 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3348         printk(KERN_DEBUG "   did not try to join ibss\n");
3349 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3350
3351         /* Selected IBSS not found in current scan results - try to scan */
3352         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3353             !ieee80211_sta_active_ibss(dev)) {
3354                 mod_timer(&ifsta->timer, jiffies +
3355                                       IEEE80211_IBSS_MERGE_INTERVAL);
3356         } else if (time_after(jiffies, local->last_scan_completed +
3357                               IEEE80211_SCAN_INTERVAL)) {
3358                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3359                        "join\n", dev->name);
3360                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3361                                               ifsta->ssid_len);
3362         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3363                 int interval = IEEE80211_SCAN_INTERVAL;
3364
3365                 if (time_after(jiffies, ifsta->ibss_join_req +
3366                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3367                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3368                             (!(local->oper_channel->flags &
3369                                         IEEE80211_CHAN_NO_IBSS)))
3370                                 return ieee80211_sta_create_ibss(dev, ifsta);
3371                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3372                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3373                                        " %d MHz\n", dev->name,
3374                                        local->hw.conf.channel->center_freq);
3375                         }
3376
3377                         /* No IBSS found - decrease scan interval and continue
3378                          * scanning. */
3379                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3380                 }
3381
3382                 ifsta->state = IEEE80211_IBSS_SEARCH;
3383                 mod_timer(&ifsta->timer, jiffies + interval);
3384                 return 0;
3385         }
3386
3387         return 0;
3388 }
3389
3390
3391 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3392 {
3393         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3394         struct ieee80211_if_sta *ifsta;
3395         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3396
3397         if (len > IEEE80211_MAX_SSID_LEN)
3398                 return -EINVAL;
3399
3400         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3401          * not defined. */
3402         if (local->ops->conf_tx) {
3403                 struct ieee80211_tx_queue_params qparam;
3404                 int i;
3405
3406                 memset(&qparam, 0, sizeof(qparam));
3407
3408                 qparam.aifs = 2;
3409
3410                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3411                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3412                         qparam.cw_min = 31;
3413                 else
3414                         qparam.cw_min = 15;
3415
3416                 qparam.cw_max = 1023;
3417                 qparam.txop = 0;
3418
3419                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3420                         local->ops->conf_tx(local_to_hw(local),
3421                                            i + IEEE80211_TX_QUEUE_DATA0,
3422                                            &qparam);
3423
3424                 /* IBSS uses different parameters for Beacon sending */
3425                 qparam.cw_min++;
3426                 qparam.cw_min *= 2;
3427                 qparam.cw_min--;
3428                 local->ops->conf_tx(local_to_hw(local),
3429                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
3430         }
3431
3432         ifsta = &sdata->u.sta;
3433
3434         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3435                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3436         memcpy(ifsta->ssid, ssid, len);
3437         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3438         ifsta->ssid_len = len;
3439
3440         if (len)
3441                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3442         else
3443                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3444         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3445             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3446                 ifsta->ibss_join_req = jiffies;
3447                 ifsta->state = IEEE80211_IBSS_SEARCH;
3448                 return ieee80211_sta_find_ibss(dev, ifsta);
3449         }
3450         return 0;
3451 }
3452
3453
3454 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3455 {
3456         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3457         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3458         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3459         *len = ifsta->ssid_len;
3460         return 0;
3461 }
3462
3463
3464 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3465 {
3466         struct ieee80211_sub_if_data *sdata;
3467         struct ieee80211_if_sta *ifsta;
3468         int res;
3469
3470         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3471         ifsta = &sdata->u.sta;
3472
3473         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3474                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3475                 res = ieee80211_if_config(dev);
3476                 if (res) {
3477                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3478                                "the low-level driver\n", dev->name);
3479                         return res;
3480                 }
3481         }
3482
3483         if (is_valid_ether_addr(bssid))
3484                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3485         else
3486                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3487
3488         return 0;
3489 }
3490
3491
3492 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3493                                     struct ieee80211_sub_if_data *sdata,
3494                                     int powersave)
3495 {
3496         struct sk_buff *skb;
3497         struct ieee80211_hdr *nullfunc;
3498         u16 fc;
3499
3500         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3501         if (!skb) {
3502                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3503                        "frame\n", sdata->dev->name);
3504                 return;
3505         }
3506         skb_reserve(skb, local->hw.extra_tx_headroom);
3507
3508         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3509         memset(nullfunc, 0, 24);
3510         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3511              IEEE80211_FCTL_TODS;
3512         if (powersave)
3513                 fc |= IEEE80211_FCTL_PM;
3514         nullfunc->frame_control = cpu_to_le16(fc);
3515         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3516         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3517         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3518
3519         ieee80211_sta_tx(sdata->dev, skb, 0);
3520 }
3521
3522
3523 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3524 {
3525         struct ieee80211_local *local = hw_to_local(hw);
3526         struct net_device *dev = local->scan_dev;
3527         struct ieee80211_sub_if_data *sdata;
3528         union iwreq_data wrqu;
3529
3530         local->last_scan_completed = jiffies;
3531         memset(&wrqu, 0, sizeof(wrqu));
3532         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3533
3534         if (local->sta_hw_scanning) {
3535                 local->sta_hw_scanning = 0;
3536                 goto done;
3537         }
3538
3539         local->sta_sw_scanning = 0;
3540         if (ieee80211_hw_config(local))
3541                 printk(KERN_DEBUG "%s: failed to restore operational "
3542                        "channel after scan\n", dev->name);
3543
3544
3545         netif_tx_lock_bh(local->mdev);
3546         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3547         local->ops->configure_filter(local_to_hw(local),
3548                                      FIF_BCN_PRBRESP_PROMISC,
3549                                      &local->filter_flags,
3550                                      local->mdev->mc_count,
3551                                      local->mdev->mc_list);
3552
3553         netif_tx_unlock_bh(local->mdev);
3554
3555         rcu_read_lock();
3556         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3557
3558                 /* No need to wake the master device. */
3559                 if (sdata->dev == local->mdev)
3560                         continue;
3561
3562                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3563                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3564                                 ieee80211_send_nullfunc(local, sdata, 0);
3565                         ieee80211_sta_timer((unsigned long)sdata);
3566                 }
3567
3568                 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT)
3569                         ieee80211_sta_timer((unsigned long)sdata);
3570
3571                 netif_wake_queue(sdata->dev);
3572         }
3573         rcu_read_unlock();
3574
3575 done:
3576         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3577         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3578                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3579                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3580                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3581                     !ieee80211_sta_active_ibss(dev)))
3582                         ieee80211_sta_find_ibss(dev, ifsta);
3583         }
3584 }
3585 EXPORT_SYMBOL(ieee80211_scan_completed);
3586
3587 void ieee80211_sta_scan_work(struct work_struct *work)
3588 {
3589         struct ieee80211_local *local =
3590                 container_of(work, struct ieee80211_local, scan_work.work);
3591         struct net_device *dev = local->scan_dev;
3592         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3593         struct ieee80211_supported_band *sband;
3594         struct ieee80211_channel *chan;
3595         int skip;
3596         unsigned long next_delay = 0;
3597
3598         if (!local->sta_sw_scanning)
3599                 return;
3600
3601         switch (local->scan_state) {
3602         case SCAN_SET_CHANNEL:
3603                 /*
3604                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3605                  * after we successfully scanned the last channel of the last
3606                  * band (and the last band is supported by the hw)
3607                  */
3608                 if (local->scan_band < IEEE80211_NUM_BANDS)
3609                         sband = local->hw.wiphy->bands[local->scan_band];
3610                 else
3611                         sband = NULL;
3612
3613                 /*
3614                  * If we are at an unsupported band and have more bands
3615                  * left to scan, advance to the next supported one.
3616                  */
3617                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3618                         local->scan_band++;
3619                         sband = local->hw.wiphy->bands[local->scan_band];
3620                         local->scan_channel_idx = 0;
3621                 }
3622
3623                 /* if no more bands/channels left, complete scan */
3624                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3625                         ieee80211_scan_completed(local_to_hw(local));
3626                         return;
3627                 }
3628                 skip = 0;
3629                 chan = &sband->channels[local->scan_channel_idx];
3630
3631                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3632                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3633                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3634                         skip = 1;
3635
3636                 if (!skip) {
3637                         local->scan_channel = chan;
3638                         if (ieee80211_hw_config(local)) {
3639                                 printk(KERN_DEBUG "%s: failed to set freq to "
3640                                        "%d MHz for scan\n", dev->name,
3641                                        chan->center_freq);
3642                                 skip = 1;
3643                         }
3644                 }
3645
3646                 /* advance state machine to next channel/band */
3647                 local->scan_channel_idx++;
3648                 if (local->scan_channel_idx >= sband->n_channels) {
3649                         /*
3650                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3651                          * we'll catch that case above and complete the scan
3652                          * if that is the case.
3653                          */
3654                         local->scan_band++;
3655                         local->scan_channel_idx = 0;
3656                 }
3657
3658                 if (skip)
3659                         break;
3660
3661                 next_delay = IEEE80211_PROBE_DELAY +
3662                              usecs_to_jiffies(local->hw.channel_change_time);
3663                 local->scan_state = SCAN_SEND_PROBE;
3664                 break;
3665         case SCAN_SEND_PROBE:
3666                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3667                 local->scan_state = SCAN_SET_CHANNEL;
3668
3669                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3670                         break;
3671                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3672                                          local->scan_ssid_len);
3673                 next_delay = IEEE80211_CHANNEL_TIME;
3674                 break;
3675         }
3676
3677         if (local->sta_sw_scanning)
3678                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3679                                    next_delay);
3680 }
3681
3682
3683 static int ieee80211_sta_start_scan(struct net_device *dev,
3684                                     u8 *ssid, size_t ssid_len)
3685 {
3686         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3687         struct ieee80211_sub_if_data *sdata;
3688
3689         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3690                 return -EINVAL;
3691
3692         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3693          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3694          * BSSID: MACAddress
3695          * SSID
3696          * ScanType: ACTIVE, PASSIVE
3697          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3698          *    a Probe frame during active scanning
3699          * ChannelList
3700          * MinChannelTime (>= ProbeDelay), in TU
3701          * MaxChannelTime: (>= MinChannelTime), in TU
3702          */
3703
3704          /* MLME-SCAN.confirm
3705           * BSSDescriptionSet
3706           * ResultCode: SUCCESS, INVALID_PARAMETERS
3707          */
3708
3709         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3710                 if (local->scan_dev == dev)
3711                         return 0;
3712                 return -EBUSY;
3713         }
3714
3715         if (local->ops->hw_scan) {
3716                 int rc = local->ops->hw_scan(local_to_hw(local),
3717                                              ssid, ssid_len);
3718                 if (!rc) {
3719                         local->sta_hw_scanning = 1;
3720                         local->scan_dev = dev;
3721                 }
3722                 return rc;
3723         }
3724
3725         local->sta_sw_scanning = 1;
3726
3727         rcu_read_lock();
3728         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3729
3730                 /* Don't stop the master interface, otherwise we can't transmit
3731                  * probes! */
3732                 if (sdata->dev == local->mdev)
3733                         continue;
3734
3735                 netif_stop_queue(sdata->dev);
3736                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3737                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3738                         ieee80211_send_nullfunc(local, sdata, 1);
3739         }
3740         rcu_read_unlock();
3741
3742         if (ssid) {
3743                 local->scan_ssid_len = ssid_len;
3744                 memcpy(local->scan_ssid, ssid, ssid_len);
3745         } else
3746                 local->scan_ssid_len = 0;
3747         local->scan_state = SCAN_SET_CHANNEL;
3748         local->scan_channel_idx = 0;
3749         local->scan_band = IEEE80211_BAND_2GHZ;
3750         local->scan_dev = dev;
3751
3752         netif_tx_lock_bh(local->mdev);
3753         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3754         local->ops->configure_filter(local_to_hw(local),
3755                                      FIF_BCN_PRBRESP_PROMISC,
3756                                      &local->filter_flags,
3757                                      local->mdev->mc_count,
3758                                      local->mdev->mc_list);
3759         netif_tx_unlock_bh(local->mdev);
3760
3761         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3762         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3763                            IEEE80211_CHANNEL_TIME);
3764
3765         return 0;
3766 }
3767
3768
3769 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3770 {
3771         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3772         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3773         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3774
3775         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3776                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3777
3778         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3779                 if (local->scan_dev == dev)
3780                         return 0;
3781                 return -EBUSY;
3782         }
3783
3784         ifsta->scan_ssid_len = ssid_len;
3785         if (ssid_len)
3786                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3787         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3788         queue_work(local->hw.workqueue, &ifsta->work);
3789         return 0;
3790 }
3791
3792 static char *
3793 ieee80211_sta_scan_result(struct net_device *dev,
3794                           struct ieee80211_sta_bss *bss,
3795                           char *current_ev, char *end_buf)
3796 {
3797         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3798         struct iw_event iwe;
3799
3800         if (time_after(jiffies,
3801                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3802                 return current_ev;
3803
3804         memset(&iwe, 0, sizeof(iwe));
3805         iwe.cmd = SIOCGIWAP;
3806         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3807         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3808         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3809                                           IW_EV_ADDR_LEN);
3810
3811         memset(&iwe, 0, sizeof(iwe));
3812         iwe.cmd = SIOCGIWESSID;
3813         if (bss->mesh_cfg) {
3814 #ifdef CONFIG_MAC80211_MESH
3815                 iwe.u.data.length = bss->mesh_id_len;
3816                 iwe.u.data.flags = 1;
3817                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3818                                                   bss->mesh_id);
3819 #endif
3820         } else {
3821                 iwe.u.data.length = bss->ssid_len;
3822                 iwe.u.data.flags = 1;
3823                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3824                                                   bss->ssid);
3825         }
3826
3827         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS
3828             || bss->mesh_cfg)) {
3829                 memset(&iwe, 0, sizeof(iwe));
3830                 iwe.cmd = SIOCGIWMODE;
3831                 if (bss->mesh_cfg)
3832                         iwe.u.mode = IW_MODE_MESH;
3833                 else if (bss->capability & WLAN_CAPABILITY_ESS)
3834                         iwe.u.mode = IW_MODE_MASTER;
3835                 else
3836                         iwe.u.mode = IW_MODE_ADHOC;
3837                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3838                                                   IW_EV_UINT_LEN);
3839         }
3840
3841         memset(&iwe, 0, sizeof(iwe));
3842         iwe.cmd = SIOCGIWFREQ;
3843         iwe.u.freq.m = bss->freq;
3844         iwe.u.freq.e = 6;
3845         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3846                                           IW_EV_FREQ_LEN);
3847
3848         memset(&iwe, 0, sizeof(iwe));
3849         iwe.cmd = SIOCGIWFREQ;
3850         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3851         iwe.u.freq.e = 0;
3852         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3853                                           IW_EV_FREQ_LEN);
3854
3855         memset(&iwe, 0, sizeof(iwe));
3856         iwe.cmd = IWEVQUAL;
3857         iwe.u.qual.qual = bss->signal;
3858         iwe.u.qual.level = bss->rssi;
3859         iwe.u.qual.noise = bss->noise;
3860         iwe.u.qual.updated = local->wstats_flags;
3861         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3862                                           IW_EV_QUAL_LEN);
3863
3864         memset(&iwe, 0, sizeof(iwe));
3865         iwe.cmd = SIOCGIWENCODE;
3866         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3867                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3868         else
3869                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3870         iwe.u.data.length = 0;
3871         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3872
3873         if (bss && bss->wpa_ie) {
3874                 memset(&iwe, 0, sizeof(iwe));
3875                 iwe.cmd = IWEVGENIE;
3876                 iwe.u.data.length = bss->wpa_ie_len;
3877                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3878                                                   bss->wpa_ie);
3879         }
3880
3881         if (bss && bss->rsn_ie) {
3882                 memset(&iwe, 0, sizeof(iwe));
3883                 iwe.cmd = IWEVGENIE;
3884                 iwe.u.data.length = bss->rsn_ie_len;
3885                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3886                                                   bss->rsn_ie);
3887         }
3888
3889         if (bss && bss->supp_rates_len > 0) {
3890                 /* display all supported rates in readable format */
3891                 char *p = current_ev + IW_EV_LCP_LEN;
3892                 int i;
3893
3894                 memset(&iwe, 0, sizeof(iwe));
3895                 iwe.cmd = SIOCGIWRATE;
3896                 /* Those two flags are ignored... */
3897                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3898
3899                 for (i = 0; i < bss->supp_rates_len; i++) {
3900                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3901                                                         0x7f) * 500000);
3902                         p = iwe_stream_add_value(current_ev, p,
3903                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3904                 }
3905                 current_ev = p;
3906         }
3907
3908         if (bss) {
3909                 char *buf;
3910                 buf = kmalloc(30, GFP_ATOMIC);
3911                 if (buf) {
3912                         memset(&iwe, 0, sizeof(iwe));
3913                         iwe.cmd = IWEVCUSTOM;
3914                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3915                         iwe.u.data.length = strlen(buf);
3916                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3917                                                           &iwe, buf);
3918                         kfree(buf);
3919                 }
3920         }
3921
3922         if (bss->mesh_cfg) {
3923                 char *buf;
3924                 u8 *cfg = bss->mesh_cfg;
3925                 buf = kmalloc(200, GFP_ATOMIC);
3926                 if (buf) {
3927                         memset(&iwe, 0, sizeof(iwe));
3928                         iwe.cmd = IWEVCUSTOM;
3929                         sprintf(buf, "Mesh network (version %d)\n"
3930                         "\t\t\tPath Selection Protocol ID: 0x%02X%02X%02X%02X\n"
3931                         "\t\t\tPath Selection Metric ID: 0x%02X%02X%02X%02X\n"
3932                         "\t\t\tCongestion Control Mode ID: 0x%02X%02X%02X%02X\n"
3933                         "\t\t\tChannel Precedence: 0x%02X%02X%02X%02X",
3934                         cfg[0], cfg[1], cfg[2], cfg[3], cfg[4], cfg[5], cfg[6],
3935                         cfg[7], cfg[8], cfg[9], cfg[10], cfg[11], cfg[12],
3936                         cfg[13], cfg[14], cfg[15], cfg[16]);
3937                         iwe.u.data.length = strlen(buf);
3938                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3939                                                           &iwe, buf);
3940                         kfree(buf);
3941                 }
3942         }
3943
3944         return current_ev;
3945 }
3946
3947
3948 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3949 {
3950         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3951         char *current_ev = buf;
3952         char *end_buf = buf + len;
3953         struct ieee80211_sta_bss *bss;
3954
3955         spin_lock_bh(&local->sta_bss_lock);
3956         list_for_each_entry(bss, &local->sta_bss_list, list) {
3957                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3958                         spin_unlock_bh(&local->sta_bss_lock);
3959                         return -E2BIG;
3960                 }
3961                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3962                                                        end_buf);
3963         }
3964         spin_unlock_bh(&local->sta_bss_lock);
3965         return current_ev - buf;
3966 }
3967
3968
3969 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3970 {
3971         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3972         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3973         kfree(ifsta->extra_ie);
3974         if (len == 0) {
3975                 ifsta->extra_ie = NULL;
3976                 ifsta->extra_ie_len = 0;
3977                 return 0;
3978         }
3979         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3980         if (!ifsta->extra_ie) {
3981                 ifsta->extra_ie_len = 0;
3982                 return -ENOMEM;
3983         }
3984         memcpy(ifsta->extra_ie, ie, len);
3985         ifsta->extra_ie_len = len;
3986         return 0;
3987 }
3988
3989
3990 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3991                                          struct sk_buff *skb, u8 *bssid,
3992                                          u8 *addr)
3993 {
3994         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3995         struct sta_info *sta;
3996         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3997         DECLARE_MAC_BUF(mac);
3998
3999         /* TODO: Could consider removing the least recently used entry and
4000          * allow new one to be added. */
4001         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4002                 if (net_ratelimit()) {
4003                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4004                                "entry %s\n", dev->name, print_mac(mac, addr));
4005                 }
4006                 return NULL;
4007         }
4008
4009         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4010                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4011
4012         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
4013         if (IS_ERR(sta))
4014                 return NULL;
4015
4016         sta->flags |= WLAN_STA_AUTHORIZED;
4017
4018         sta->supp_rates[local->hw.conf.channel->band] =
4019                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4020
4021         rate_control_rate_init(sta, local);
4022
4023         return sta; /* caller will call sta_info_put() */
4024 }
4025
4026
4027 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4028 {
4029         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4030         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4031
4032         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4033                dev->name, reason);
4034
4035         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4036             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4037                 return -EINVAL;
4038
4039         ieee80211_send_deauth(dev, ifsta, reason);
4040         ieee80211_set_disassoc(dev, ifsta, 1);
4041         return 0;
4042 }
4043
4044
4045 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4046 {
4047         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4048         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4049
4050         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4051                dev->name, reason);
4052
4053         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4054                 return -EINVAL;
4055
4056         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4057                 return -1;
4058
4059         ieee80211_send_disassoc(dev, ifsta, reason);
4060         ieee80211_set_disassoc(dev, ifsta, 0);
4061         return 0;
4062 }