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

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "ieee80211_rate.h"
  34 #include "ieee80211_led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  61
  62 #define ERP_INFO_USE_PROTECTION BIT(1)
  63
  64 /* mgmt header + 1 byte action code */
  65 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  66
  67 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  68 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  69 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  70 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  71 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  72
  73 /* next values represent the buffer size for A-MPDU frame.
  74  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  75 #define IEEE80211_MIN_AMPDU_BUF 0x8
  76 #define IEEE80211_MAX_AMPDU_BUF 0x40
  77
  78 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  79                                      u8 *ssid, size_t ssid_len);
  80 static struct ieee80211_sta_bss *
  81 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  82                      u8 *ssid, u8 ssid_len);
  83 static void ieee80211_rx_bss_put(struct net_device *dev,
  84                                  struct ieee80211_sta_bss *bss);
  85 static int ieee80211_sta_find_ibss(struct net_device *dev,
  86                                    struct ieee80211_if_sta *ifsta);
  87 static int ieee80211_sta_wep_configured(struct net_device *dev);
  88 static int ieee80211_sta_start_scan(struct net_device *dev,
  89                                     u8 *ssid, size_t ssid_len);
  90 static int ieee80211_sta_config_auth(struct net_device *dev,
  91                                      struct ieee80211_if_sta *ifsta);
  92
  93
  94 void ieee802_11_parse_elems(u8 *start, size_t len,
  95                             struct ieee802_11_elems *elems)
  96 {
  97         size_t left = len;
  98         u8 *pos = start;
  99
 100         memset(elems, 0, sizeof(*elems));
 101
 102         while (left >= 2) {
 103                 u8 id, elen;
 104
 105                 id = *pos++;
 106                 elen = *pos++;
 107                 left -= 2;
 108
 109                 if (elen > left)
 110                         return;
 111
 112                 switch (id) {
 113                 case WLAN_EID_SSID:
 114                         elems->ssid = pos;
 115                         elems->ssid_len = elen;
 116                         break;
 117                 case WLAN_EID_SUPP_RATES:
 118                         elems->supp_rates = pos;
 119                         elems->supp_rates_len = elen;
 120                         break;
 121                 case WLAN_EID_FH_PARAMS:
 122                         elems->fh_params = pos;
 123                         elems->fh_params_len = elen;
 124                         break;
 125                 case WLAN_EID_DS_PARAMS:
 126                         elems->ds_params = pos;
 127                         elems->ds_params_len = elen;
 128                         break;
 129                 case WLAN_EID_CF_PARAMS:
 130                         elems->cf_params = pos;
 131                         elems->cf_params_len = elen;
 132                         break;
 133                 case WLAN_EID_TIM:
 134                         elems->tim = pos;
 135                         elems->tim_len = elen;
 136                         break;
 137                 case WLAN_EID_IBSS_PARAMS:
 138                         elems->ibss_params = pos;
 139                         elems->ibss_params_len = elen;
 140                         break;
 141                 case WLAN_EID_CHALLENGE:
 142                         elems->challenge = pos;
 143                         elems->challenge_len = elen;
 144                         break;
 145                 case WLAN_EID_WPA:
 146                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 147                             pos[2] == 0xf2) {
 148                                 /* Microsoft OUI (00:50:F2) */
 149                                 if (pos[3] == 1) {
 150                                         /* OUI Type 1 - WPA IE */
 151                                         elems->wpa = pos;
 152                                         elems->wpa_len = elen;
 153                                 } else if (elen >= 5 && pos[3] == 2) {
 154                                         if (pos[4] == 0) {
 155                                                 elems->wmm_info = pos;
 156                                                 elems->wmm_info_len = elen;
 157                                         } else if (pos[4] == 1) {
 158                                                 elems->wmm_param = pos;
 159                                                 elems->wmm_param_len = elen;
 160                                         }
 161                                 }
 162                         }
 163                         break;
 164                 case WLAN_EID_RSN:
 165                         elems->rsn = pos;
 166                         elems->rsn_len = elen;
 167                         break;
 168                 case WLAN_EID_ERP_INFO:
 169                         elems->erp_info = pos;
 170                         elems->erp_info_len = elen;
 171                         break;
 172                 case WLAN_EID_EXT_SUPP_RATES:
 173                         elems->ext_supp_rates = pos;
 174                         elems->ext_supp_rates_len = elen;
 175                         break;
 176                 case WLAN_EID_HT_CAPABILITY:
 177                         elems->ht_cap_elem = pos;
 178                         elems->ht_cap_elem_len = elen;
 179                         break;
 180                 case WLAN_EID_HT_EXTRA_INFO:
 181                         elems->ht_info_elem = pos;
 182                         elems->ht_info_elem_len = elen;
 183                         break;
 184                 case WLAN_EID_MESH_ID:
 185                         elems->mesh_id = pos;
 186                         elems->mesh_id_len = elen;
 187                         break;
 188                 case WLAN_EID_MESH_CONFIG:
 189                         elems->mesh_config = pos;
 190                         elems->mesh_config_len = elen;
 191                         break;
 192                 case WLAN_EID_PEER_LINK:
 193                         elems->peer_link = pos;
 194                         elems->peer_link_len = elen;
 195                         break;
 196                 case WLAN_EID_PREQ:
 197                         elems->preq = pos;
 198                         elems->preq_len = elen;
 199                         break;
 200                 case WLAN_EID_PREP:
 201                         elems->prep = pos;
 202                         elems->prep_len = elen;
 203                         break;
 204                 case WLAN_EID_PERR:
 205                         elems->perr = pos;
 206                         elems->perr_len = elen;
 207                         break;
 208                 default:
 209                         break;
 210                 }
 211
 212                 left -= elen;
 213                 pos += elen;
 214         }
 215 }
 216
 217
 218 static int ecw2cw(int ecw)
 219 {
 220         return (1 << ecw) - 1;
 221 }
 222
 223 static void ieee80211_sta_wmm_params(struct net_device *dev,
 224                                      struct ieee80211_if_sta *ifsta,
 225                                      u8 *wmm_param, size_t wmm_param_len)
 226 {
 227         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 228         struct ieee80211_tx_queue_params params;
 229         size_t left;
 230         int count;
 231         u8 *pos;
 232
 233         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 234                 return;
 235         count = wmm_param[6] & 0x0f;
 236         if (count == ifsta->wmm_last_param_set)
 237                 return;
 238         ifsta->wmm_last_param_set = count;
 239
 240         pos = wmm_param + 8;
 241         left = wmm_param_len - 8;
 242
 243         memset(&params, 0, sizeof(params));
 244
 245         if (!local->ops->conf_tx)
 246                 return;
 247
 248         local->wmm_acm = 0;
 249         for (; left >= 4; left -= 4, pos += 4) {
 250                 int aci = (pos[0] >> 5) & 0x03;
 251                 int acm = (pos[0] >> 4) & 0x01;
 252                 int queue;
 253
 254                 switch (aci) {
 255                 case 1:
 256                         queue = IEEE80211_TX_QUEUE_DATA3;
 257                         if (acm) {
 258                                 local->wmm_acm |= BIT(0) | BIT(3);
 259                         }
 260                         break;
 261                 case 2:
 262                         queue = IEEE80211_TX_QUEUE_DATA1;
 263                         if (acm) {
 264                                 local->wmm_acm |= BIT(4) | BIT(5);
 265                         }
 266                         break;
 267                 case 3:
 268                         queue = IEEE80211_TX_QUEUE_DATA0;
 269                         if (acm) {
 270                                 local->wmm_acm |= BIT(6) | BIT(7);
 271                         }
 272                         break;
 273                 case 0:
 274                 default:
 275                         queue = IEEE80211_TX_QUEUE_DATA2;
 276                         if (acm) {
 277                                 local->wmm_acm |= BIT(1) | BIT(2);
 278                         }
 279                         break;
 280                 }
 281
 282                 params.aifs = pos[0] & 0x0f;
 283                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 284                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 285                 params.txop = pos[2] | (pos[3] << 8);
 286 #ifdef CONFIG_MAC80211_DEBUG
 287                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 288                        "cWmin=%d cWmax=%d txop=%d\n",
 289                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 290                        params.cw_max, params.txop);
 291 #endif
 292                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 293                  * AC for now) */
 294                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 295                         printk(KERN_DEBUG "%s: failed to set TX queue "
 296                                "parameters for queue %d\n", dev->name, queue);
 297                 }
 298         }
 299 }
 300
 301
 302 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 303                                    u8 erp_value)
 304 {
 305         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 306         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 307         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 308         bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 309         DECLARE_MAC_BUF(mac);
 310         u32 changed = 0;
 311
 312         if (use_protection != bss_conf->use_cts_prot) {
 313                 if (net_ratelimit()) {
 314                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 315                                "%s)\n",
 316                                sdata->dev->name,
 317                                use_protection ? "enabled" : "disabled",
 318                                print_mac(mac, ifsta->bssid));
 319                 }
 320                 bss_conf->use_cts_prot = use_protection;
 321                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 322         }
 323
 324         if (preamble_mode != bss_conf->use_short_preamble) {
 325                 if (net_ratelimit()) {
 326                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 327                                " (BSSID=%s)\n",
 328                                sdata->dev->name,
 329                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 330                                         "short" : "long",
 331                                print_mac(mac, ifsta->bssid));
 332                 }
 333                 bss_conf->use_short_preamble = preamble_mode;
 334                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 335         }
 336
 337         return changed;
 338 }
 339
 340 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 341                                    struct ieee80211_ht_info *ht_info)
 342 {
 343
 344         if (ht_info == NULL)
 345                 return -EINVAL;
 346
 347         memset(ht_info, 0, sizeof(*ht_info));
 348
 349         if (ht_cap_ie) {
 350                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 351
 352                 ht_info->ht_supported = 1;
 353                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 354                 ht_info->ampdu_factor =
 355                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 356                 ht_info->ampdu_density =
 357                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 358                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 359         } else
 360                 ht_info->ht_supported = 0;
 361
 362         return 0;
 363 }
 364
 365 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 366                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 367                         struct ieee80211_ht_bss_info *bss_info)
 368 {
 369         if (bss_info == NULL)
 370                 return -EINVAL;
 371
 372         memset(bss_info, 0, sizeof(*bss_info));
 373
 374         if (ht_add_info_ie) {
 375                 u16 op_mode;
 376                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 377
 378                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 379                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 380                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 381         }
 382
 383         return 0;
 384 }
 385
 386 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 387                                          struct ieee80211_if_sta *ifsta)
 388 {
 389         char *buf;
 390         size_t len;
 391         int i;
 392         union iwreq_data wrqu;
 393
 394         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 395                 return;
 396
 397         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 398                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 399         if (!buf)
 400                 return;
 401
 402         len = sprintf(buf, "ASSOCINFO(");
 403         if (ifsta->assocreq_ies) {
 404                 len += sprintf(buf + len, "ReqIEs=");
 405                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 406                         len += sprintf(buf + len, "%02x",
 407                                        ifsta->assocreq_ies[i]);
 408                 }
 409         }
 410         if (ifsta->assocresp_ies) {
 411                 if (ifsta->assocreq_ies)
 412                         len += sprintf(buf + len, " ");
 413                 len += sprintf(buf + len, "RespIEs=");
 414                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 415                         len += sprintf(buf + len, "%02x",
 416                                        ifsta->assocresp_ies[i]);
 417                 }
 418         }
 419         len += sprintf(buf + len, ")");
 420
 421         if (len > IW_CUSTOM_MAX) {
 422                 len = sprintf(buf, "ASSOCRESPIE=");
 423                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 424                         len += sprintf(buf + len, "%02x",
 425                                        ifsta->assocresp_ies[i]);
 426                 }
 427         }
 428
 429         memset(&wrqu, 0, sizeof(wrqu));
 430         wrqu.data.length = len;
 431         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 432
 433         kfree(buf);
 434 }
 435
 436
 437 static void ieee80211_set_associated(struct net_device *dev,
 438                                      struct ieee80211_if_sta *ifsta,
 439                                      bool assoc)
 440 {
 441         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 442         struct ieee80211_local *local = sdata->local;
 443         union iwreq_data wrqu;
 444         u32 changed = BSS_CHANGED_ASSOC;
 445
 446         if (assoc) {
 447                 struct ieee80211_sta_bss *bss;
 448
 449                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 450
 451                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 452                         return;
 453
 454                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 455                                            local->hw.conf.channel->center_freq,
 456                                            ifsta->ssid, ifsta->ssid_len);
 457                 if (bss) {
 458                         if (bss->has_erp_value)
 459                                 changed |= ieee80211_handle_erp_ie(
 460                                                 sdata, bss->erp_value);
 461                         ieee80211_rx_bss_put(dev, bss);
 462                 }
 463
 464                 netif_carrier_on(dev);
 465                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 466                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 467                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 468                 ieee80211_sta_send_associnfo(dev, ifsta);
 469         } else {
 470                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 471
 472                 netif_carrier_off(dev);
 473                 ieee80211_reset_erp_info(dev);
 474                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 475         }
 476         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 477         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 478         ifsta->last_probe = jiffies;
 479         ieee80211_led_assoc(local, assoc);
 480
 481         sdata->bss_conf.assoc = assoc;
 482         ieee80211_bss_info_change_notify(sdata, changed);
 483 }
 484
 485 static void ieee80211_set_disassoc(struct net_device *dev,
 486                                    struct ieee80211_if_sta *ifsta, int deauth)
 487 {
 488         if (deauth)
 489                 ifsta->auth_tries = 0;
 490         ifsta->assoc_tries = 0;
 491         ieee80211_set_associated(dev, ifsta, 0);
 492 }
 493
 494 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 495                       int encrypt)
 496 {
 497         struct ieee80211_sub_if_data *sdata;
 498         struct ieee80211_tx_packet_data *pkt_data;
 499
 500         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 501         skb->dev = sdata->local->mdev;
 502         skb_set_mac_header(skb, 0);
 503         skb_set_network_header(skb, 0);
 504         skb_set_transport_header(skb, 0);
 505
 506         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 507         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 508         pkt_data->ifindex = sdata->dev->ifindex;
 509         if (!encrypt)
 510                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 511
 512         dev_queue_xmit(skb);
 513 }
 514
 515
 516 static void ieee80211_send_auth(struct net_device *dev,
 517                                 struct ieee80211_if_sta *ifsta,
 518                                 int transaction, u8 *extra, size_t extra_len,
 519                                 int encrypt)
 520 {
 521         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 522         struct sk_buff *skb;
 523         struct ieee80211_mgmt *mgmt;
 524
 525         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 526                             sizeof(*mgmt) + 6 + extra_len);
 527         if (!skb) {
 528                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 529                        "frame\n", dev->name);
 530                 return;
 531         }
 532         skb_reserve(skb, local->hw.extra_tx_headroom);
 533
 534         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 535         memset(mgmt, 0, 24 + 6);
 536         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 537                                            IEEE80211_STYPE_AUTH);
 538         if (encrypt)
 539                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 540         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 541         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 542         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 543         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 544         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 545         ifsta->auth_transaction = transaction + 1;
 546         mgmt->u.auth.status_code = cpu_to_le16(0);
 547         if (extra)
 548                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 549
 550         ieee80211_sta_tx(dev, skb, encrypt);
 551 }
 552
 553
 554 static void ieee80211_authenticate(struct net_device *dev,
 555                                    struct ieee80211_if_sta *ifsta)
 556 {
 557         DECLARE_MAC_BUF(mac);
 558
 559         ifsta->auth_tries++;
 560         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 561                 printk(KERN_DEBUG "%s: authentication with AP %s"
 562                        " timed out\n",
 563                        dev->name, print_mac(mac, ifsta->bssid));
 564                 ifsta->state = IEEE80211_DISABLED;
 565                 return;
 566         }
 567
 568         ifsta->state = IEEE80211_AUTHENTICATE;
 569         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 570                dev->name, print_mac(mac, ifsta->bssid));
 571
 572         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 573
 574         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 575 }
 576
 577
 578 static void ieee80211_send_assoc(struct net_device *dev,
 579                                  struct ieee80211_if_sta *ifsta)
 580 {
 581         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 582         struct sk_buff *skb;
 583         struct ieee80211_mgmt *mgmt;
 584         u8 *pos, *ies;
 585         int i, len;
 586         u16 capab;
 587         struct ieee80211_sta_bss *bss;
 588         int wmm = 0;
 589         struct ieee80211_supported_band *sband;
 590
 591         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 592                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 593                             ifsta->ssid_len);
 594         if (!skb) {
 595                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 596                        "frame\n", dev->name);
 597                 return;
 598         }
 599         skb_reserve(skb, local->hw.extra_tx_headroom);
 600
 601         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 602
 603         capab = ifsta->capab;
 604
 605         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 606                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 607                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 608                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 609                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 610         }
 611
 612         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 613                                    local->hw.conf.channel->center_freq,
 614                                    ifsta->ssid, ifsta->ssid_len);
 615         if (bss) {
 616                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 617                         capab |= WLAN_CAPABILITY_PRIVACY;
 618                 if (bss->wmm_ie) {
 619                         wmm = 1;
 620                 }
 621                 ieee80211_rx_bss_put(dev, bss);
 622         }
 623
 624         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 625         memset(mgmt, 0, 24);
 626         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 627         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 628         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 629
 630         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 631                 skb_put(skb, 10);
 632                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 633                                                    IEEE80211_STYPE_REASSOC_REQ);
 634                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 635                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 636                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 637                        ETH_ALEN);
 638         } else {
 639                 skb_put(skb, 4);
 640                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 641                                                    IEEE80211_STYPE_ASSOC_REQ);
 642                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 643                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 644         }
 645
 646         /* SSID */
 647         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 648         *pos++ = WLAN_EID_SSID;
 649         *pos++ = ifsta->ssid_len;
 650         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 651
 652         len = sband->n_bitrates;
 653         if (len > 8)
 654                 len = 8;
 655         pos = skb_put(skb, len + 2);
 656         *pos++ = WLAN_EID_SUPP_RATES;
 657         *pos++ = len;
 658         for (i = 0; i < len; i++) {
 659                 int rate = sband->bitrates[i].bitrate;
 660                 *pos++ = (u8) (rate / 5);
 661         }
 662
 663         if (sband->n_bitrates > len) {
 664                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 665                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 666                 *pos++ = sband->n_bitrates - len;
 667                 for (i = len; i < sband->n_bitrates; i++) {
 668                         int rate = sband->bitrates[i].bitrate;
 669                         *pos++ = (u8) (rate / 5);
 670                 }
 671         }
 672
 673         if (ifsta->extra_ie) {
 674                 pos = skb_put(skb, ifsta->extra_ie_len);
 675                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 676         }
 677
 678         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 679                 pos = skb_put(skb, 9);
 680                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 681                 *pos++ = 7; /* len */
 682                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 683                 *pos++ = 0x50;
 684                 *pos++ = 0xf2;
 685                 *pos++ = 2; /* WME */
 686                 *pos++ = 0; /* WME info */
 687                 *pos++ = 1; /* WME ver */
 688                 *pos++ = 0;
 689         }
 690         /* wmm support is a must to HT */
 691         if (wmm && sband->ht_info.ht_supported) {
 692                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 693                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 694                 *pos++ = WLAN_EID_HT_CAPABILITY;
 695                 *pos++ = sizeof(struct ieee80211_ht_cap);
 696                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 697                 memcpy(pos, &tmp, sizeof(u16));
 698                 pos += sizeof(u16);
 699                 /* TODO: needs a define here for << 2 */
 700                 *pos++ = sband->ht_info.ampdu_factor |
 701                          (sband->ht_info.ampdu_density << 2);
 702                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 703         }
 704
 705         kfree(ifsta->assocreq_ies);
 706         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 707         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 708         if (ifsta->assocreq_ies)
 709                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 710
 711         ieee80211_sta_tx(dev, skb, 0);
 712 }
 713
 714
 715 static void ieee80211_send_deauth(struct net_device *dev,
 716                                   struct ieee80211_if_sta *ifsta, u16 reason)
 717 {
 718         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 719         struct sk_buff *skb;
 720         struct ieee80211_mgmt *mgmt;
 721
 722         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 723         if (!skb) {
 724                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 725                        "frame\n", dev->name);
 726                 return;
 727         }
 728         skb_reserve(skb, local->hw.extra_tx_headroom);
 729
 730         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 731         memset(mgmt, 0, 24);
 732         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 733         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 734         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 735         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 736                                            IEEE80211_STYPE_DEAUTH);
 737         skb_put(skb, 2);
 738         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 739
 740         ieee80211_sta_tx(dev, skb, 0);
 741 }
 742
 743
 744 static void ieee80211_send_disassoc(struct net_device *dev,
 745                                     struct ieee80211_if_sta *ifsta, u16 reason)
 746 {
 747         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 748         struct sk_buff *skb;
 749         struct ieee80211_mgmt *mgmt;
 750
 751         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 752         if (!skb) {
 753                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 754                        "frame\n", dev->name);
 755                 return;
 756         }
 757         skb_reserve(skb, local->hw.extra_tx_headroom);
 758
 759         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 760         memset(mgmt, 0, 24);
 761         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 762         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 763         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 764         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 765                                            IEEE80211_STYPE_DISASSOC);
 766         skb_put(skb, 2);
 767         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 768
 769         ieee80211_sta_tx(dev, skb, 0);
 770 }
 771
 772
 773 static int ieee80211_privacy_mismatch(struct net_device *dev,
 774                                       struct ieee80211_if_sta *ifsta)
 775 {
 776         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 777         struct ieee80211_sta_bss *bss;
 778         int bss_privacy;
 779         int wep_privacy;
 780         int privacy_invoked;
 781
 782         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 783                 return 0;
 784
 785         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 786                                    local->hw.conf.channel->center_freq,
 787                                    ifsta->ssid, ifsta->ssid_len);
 788         if (!bss)
 789                 return 0;
 790
 791         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 792         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 793         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 794
 795         ieee80211_rx_bss_put(dev, bss);
 796
 797         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 798                 return 0;
 799
 800         return 1;
 801 }
 802
 803
 804 static void ieee80211_associate(struct net_device *dev,
 805                                 struct ieee80211_if_sta *ifsta)
 806 {
 807         DECLARE_MAC_BUF(mac);
 808
 809         ifsta->assoc_tries++;
 810         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 811                 printk(KERN_DEBUG "%s: association with AP %s"
 812                        " timed out\n",
 813                        dev->name, print_mac(mac, ifsta->bssid));
 814                 ifsta->state = IEEE80211_DISABLED;
 815                 return;
 816         }
 817
 818         ifsta->state = IEEE80211_ASSOCIATE;
 819         printk(KERN_DEBUG "%s: associate with AP %s\n",
 820                dev->name, print_mac(mac, ifsta->bssid));
 821         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 822                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 823                        "mixed-cell disabled - abort association\n", dev->name);
 824                 ifsta->state = IEEE80211_DISABLED;
 825                 return;
 826         }
 827
 828         ieee80211_send_assoc(dev, ifsta);
 829
 830         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 831 }
 832
 833
 834 static void ieee80211_associated(struct net_device *dev,
 835                                  struct ieee80211_if_sta *ifsta)
 836 {
 837         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 838         struct sta_info *sta;
 839         int disassoc;
 840         DECLARE_MAC_BUF(mac);
 841
 842         /* TODO: start monitoring current AP signal quality and number of
 843          * missed beacons. Scan other channels every now and then and search
 844          * for better APs. */
 845         /* TODO: remove expired BSSes */
 846
 847         ifsta->state = IEEE80211_ASSOCIATED;
 848
 849         rcu_read_lock();
 850
 851         sta = sta_info_get(local, ifsta->bssid);
 852         if (!sta) {
 853                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 854                        dev->name, print_mac(mac, ifsta->bssid));
 855                 disassoc = 1;
 856         } else {
 857                 disassoc = 0;
 858                 if (time_after(jiffies,
 859                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 860                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 861                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 862                                        "current AP %s - assume out of "
 863                                        "range\n",
 864                                        dev->name, print_mac(mac, ifsta->bssid));
 865                                 disassoc = 1;
 866                                 sta_info_unlink(&sta);
 867                         } else
 868                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 869                                                          local->scan_ssid,
 870                                                          local->scan_ssid_len);
 871                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 872                 } else {
 873                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 874                         if (time_after(jiffies, ifsta->last_probe +
 875                                        IEEE80211_PROBE_INTERVAL)) {
 876                                 ifsta->last_probe = jiffies;
 877                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 878                                                          ifsta->ssid,
 879                                                          ifsta->ssid_len);
 880                         }
 881                 }
 882         }
 883
 884         rcu_read_unlock();
 885
 886         if (disassoc && sta) {
 887                 synchronize_rcu();
 888                 rtnl_lock();
 889                 sta_info_destroy(sta);
 890                 rtnl_unlock();
 891         }
 892
 893         if (disassoc) {
 894                 ifsta->state = IEEE80211_DISABLED;
 895                 ieee80211_set_associated(dev, ifsta, 0);
 896         } else {
 897                 mod_timer(&ifsta->timer, jiffies +
 898                                       IEEE80211_MONITORING_INTERVAL);
 899         }
 900 }
 901
 902
 903 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 904                                      u8 *ssid, size_t ssid_len)
 905 {
 906         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 907         struct ieee80211_supported_band *sband;
 908         struct sk_buff *skb;
 909         struct ieee80211_mgmt *mgmt;
 910         u8 *pos, *supp_rates, *esupp_rates = NULL;
 911         int i;
 912
 913         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 914         if (!skb) {
 915                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 916                        "request\n", dev->name);
 917                 return;
 918         }
 919         skb_reserve(skb, local->hw.extra_tx_headroom);
 920
 921         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 922         memset(mgmt, 0, 24);
 923         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 924                                            IEEE80211_STYPE_PROBE_REQ);
 925         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 926         if (dst) {
 927                 memcpy(mgmt->da, dst, ETH_ALEN);
 928                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 929         } else {
 930                 memset(mgmt->da, 0xff, ETH_ALEN);
 931                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 932         }
 933         pos = skb_put(skb, 2 + ssid_len);
 934         *pos++ = WLAN_EID_SSID;
 935         *pos++ = ssid_len;
 936         memcpy(pos, ssid, ssid_len);
 937
 938         supp_rates = skb_put(skb, 2);
 939         supp_rates[0] = WLAN_EID_SUPP_RATES;
 940         supp_rates[1] = 0;
 941         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 942
 943         for (i = 0; i < sband->n_bitrates; i++) {
 944                 struct ieee80211_rate *rate = &sband->bitrates[i];
 945                 if (esupp_rates) {
 946                         pos = skb_put(skb, 1);
 947                         esupp_rates[1]++;
 948                 } else if (supp_rates[1] == 8) {
 949                         esupp_rates = skb_put(skb, 3);
 950                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 951                         esupp_rates[1] = 1;
 952                         pos = &esupp_rates[2];
 953                 } else {
 954                         pos = skb_put(skb, 1);
 955                         supp_rates[1]++;
 956                 }
 957                 *pos = rate->bitrate / 5;
 958         }
 959
 960         ieee80211_sta_tx(dev, skb, 0);
 961 }
 962
 963
 964 static int ieee80211_sta_wep_configured(struct net_device *dev)
 965 {
 966         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 967         if (!sdata || !sdata->default_key ||
 968             sdata->default_key->conf.alg != ALG_WEP)
 969                 return 0;
 970         return 1;
 971 }
 972
 973
 974 static void ieee80211_auth_completed(struct net_device *dev,
 975                                      struct ieee80211_if_sta *ifsta)
 976 {
 977         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 978         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 979         ieee80211_associate(dev, ifsta);
 980 }
 981
 982
 983 static void ieee80211_auth_challenge(struct net_device *dev,
 984                                      struct ieee80211_if_sta *ifsta,
 985                                      struct ieee80211_mgmt *mgmt,
 986                                      size_t len)
 987 {
 988         u8 *pos;
 989         struct ieee802_11_elems elems;
 990
 991         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 992         pos = mgmt->u.auth.variable;
 993         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 994         if (!elems.challenge) {
 995                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 996                        "frame\n", dev->name);
 997                 return;
 998         }
 999         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1000                             elems.challenge_len + 2, 1);
1001 }
1002
1003 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1004                                         u8 dialog_token, u16 status, u16 policy,
1005                                         u16 buf_size, u16 timeout)
1006 {
1007         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1008         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1009         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1010         struct sk_buff *skb;
1011         struct ieee80211_mgmt *mgmt;
1012         u16 capab;
1013
1014         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1015                                         sizeof(mgmt->u.action.u.addba_resp));
1016         if (!skb) {
1017                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1018                        "for addba resp frame\n", dev->name);
1019                 return;
1020         }
1021
1022         skb_reserve(skb, local->hw.extra_tx_headroom);
1023         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1024         memset(mgmt, 0, 24);
1025         memcpy(mgmt->da, da, ETH_ALEN);
1026         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1027         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1028                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1029         else
1030                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1031         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1032                                            IEEE80211_STYPE_ACTION);
1033
1034         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1035         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1036         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1037         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1038
1039         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1040         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1041         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1042
1043         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1044         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1045         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1046
1047         ieee80211_sta_tx(dev, skb, 0);
1048
1049         return;
1050 }
1051
1052 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1053                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1054                                 u16 agg_size, u16 timeout)
1055 {
1056         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1057         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1058         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1059         struct sk_buff *skb;
1060         struct ieee80211_mgmt *mgmt;
1061         u16 capab;
1062
1063         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1064                                 sizeof(mgmt->u.action.u.addba_req));
1065
1066
1067         if (!skb) {
1068                 printk(KERN_ERR "%s: failed to allocate buffer "
1069                                 "for addba request frame\n", dev->name);
1070                 return;
1071         }
1072         skb_reserve(skb, local->hw.extra_tx_headroom);
1073         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1074         memset(mgmt, 0, 24);
1075         memcpy(mgmt->da, da, ETH_ALEN);
1076         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1077         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1078                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1079         else
1080                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1081
1082         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1083                                         IEEE80211_STYPE_ACTION);
1084
1085         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1086
1087         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1088         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1089
1090         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1091         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1092         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1093         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1094
1095         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1096
1097         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1098         mgmt->u.action.u.addba_req.start_seq_num =
1099                                         cpu_to_le16(start_seq_num << 4);
1100
1101         ieee80211_sta_tx(dev, skb, 0);
1102 }
1103
1104 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1105                                                 struct ieee80211_mgmt *mgmt,
1106                                                 size_t len)
1107 {
1108         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1109         struct ieee80211_hw *hw = &local->hw;
1110         struct ieee80211_conf *conf = &hw->conf;
1111         struct sta_info *sta;
1112         struct tid_ampdu_rx *tid_agg_rx;
1113         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1114         u8 dialog_token;
1115         int ret = -EOPNOTSUPP;
1116         DECLARE_MAC_BUF(mac);
1117
1118         rcu_read_lock();
1119
1120         sta = sta_info_get(local, mgmt->sa);
1121         if (!sta) {
1122                 rcu_read_unlock();
1123                 return;
1124         }
1125
1126         /* extract session parameters from addba request frame */
1127         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1128         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1129         start_seq_num =
1130                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1131
1132         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1133         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1134         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1135         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1136
1137         status = WLAN_STATUS_REQUEST_DECLINED;
1138
1139         /* sanity check for incoming parameters:
1140          * check if configuration can support the BA policy
1141          * and if buffer size does not exceeds max value */
1142         if (((ba_policy != 1)
1143                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1144                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1145                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1146 #ifdef CONFIG_MAC80211_HT_DEBUG
1147                 if (net_ratelimit())
1148                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1149                                 "%s on tid %u. policy %d, buffer size %d\n",
1150                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1151                                 buf_size);
1152 #endif /* CONFIG_MAC80211_HT_DEBUG */
1153                 goto end_no_lock;
1154         }
1155         /* determine default buffer size */
1156         if (buf_size == 0) {
1157                 struct ieee80211_supported_band *sband;
1158
1159                 sband = local->hw.wiphy->bands[conf->channel->band];
1160                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1161                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1162         }
1163
1164         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1165
1166         /* examine state machine */
1167         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1168
1169         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1170 #ifdef CONFIG_MAC80211_HT_DEBUG
1171                 if (net_ratelimit())
1172                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1173                                 "%s on tid %u\n",
1174                                 print_mac(mac, mgmt->sa), tid);
1175 #endif /* CONFIG_MAC80211_HT_DEBUG */
1176                 goto end;
1177         }
1178
1179         /* prepare reordering buffer */
1180         tid_agg_rx->reorder_buf =
1181                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1182         if (!tid_agg_rx->reorder_buf) {
1183                 if (net_ratelimit())
1184                         printk(KERN_ERR "can not allocate reordering buffer "
1185                                "to tid %d\n", tid);
1186                 goto end;
1187         }
1188         memset(tid_agg_rx->reorder_buf, 0,
1189                 buf_size * sizeof(struct sk_buf *));
1190
1191         if (local->ops->ampdu_action)
1192                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1193                                                sta->addr, tid, &start_seq_num);
1194 #ifdef CONFIG_MAC80211_HT_DEBUG
1195         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1196 #endif /* CONFIG_MAC80211_HT_DEBUG */
1197
1198         if (ret) {
1199                 kfree(tid_agg_rx->reorder_buf);
1200                 goto end;
1201         }
1202
1203         /* change state and send addba resp */
1204         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1205         tid_agg_rx->dialog_token = dialog_token;
1206         tid_agg_rx->ssn = start_seq_num;
1207         tid_agg_rx->head_seq_num = start_seq_num;
1208         tid_agg_rx->buf_size = buf_size;
1209         tid_agg_rx->timeout = timeout;
1210         tid_agg_rx->stored_mpdu_num = 0;
1211         status = WLAN_STATUS_SUCCESS;
1212 end:
1213         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1214
1215 end_no_lock:
1216         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1217                                   dialog_token, status, 1, buf_size, timeout);
1218         rcu_read_unlock();
1219 }
1220
1221 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1222                                              struct ieee80211_mgmt *mgmt,
1223                                              size_t len)
1224 {
1225         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1226         struct ieee80211_hw *hw = &local->hw;
1227         struct sta_info *sta;
1228         u16 capab;
1229         u16 tid;
1230         u8 *state;
1231
1232         rcu_read_lock();
1233
1234         sta = sta_info_get(local, mgmt->sa);
1235         if (!sta) {
1236                 rcu_read_unlock();
1237                 return;
1238         }
1239
1240         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1241         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1242
1243         state = &sta->ampdu_mlme.tid_tx[tid].state;
1244
1245         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1246
1247         if (mgmt->u.action.u.addba_resp.dialog_token !=
1248                 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1249                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1250 #ifdef CONFIG_MAC80211_HT_DEBUG
1251                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1252 #endif /* CONFIG_MAC80211_HT_DEBUG */
1253                 rcu_read_unlock();
1254                 return;
1255         }
1256
1257         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1258 #ifdef CONFIG_MAC80211_HT_DEBUG
1259         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1260 #endif /* CONFIG_MAC80211_HT_DEBUG */
1261         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1262                         == WLAN_STATUS_SUCCESS) {
1263                 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1264                         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1265                         printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1266                                 "%d\n", *state);
1267                         rcu_read_unlock();
1268                         return;
1269                 }
1270
1271                 if (*state & HT_ADDBA_RECEIVED_MSK)
1272                         printk(KERN_DEBUG "double addBA response\n");
1273
1274                 *state |= HT_ADDBA_RECEIVED_MSK;
1275                 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1276
1277                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1278                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1279                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1280                 }
1281
1282                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1283                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1284         } else {
1285                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1286
1287                 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1288                 /* this will allow the state check in stop_BA_session */
1289                 *state = HT_AGG_STATE_OPERATIONAL;
1290                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1291                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1292                                              WLAN_BACK_INITIATOR);
1293         }
1294         rcu_read_unlock();
1295 }
1296
1297 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1298                           u16 initiator, u16 reason_code)
1299 {
1300         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1301         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1302         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1303         struct sk_buff *skb;
1304         struct ieee80211_mgmt *mgmt;
1305         u16 params;
1306
1307         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1308                                         sizeof(mgmt->u.action.u.delba));
1309
1310         if (!skb) {
1311                 printk(KERN_ERR "%s: failed to allocate buffer "
1312                                         "for delba frame\n", dev->name);
1313                 return;
1314         }
1315
1316         skb_reserve(skb, local->hw.extra_tx_headroom);
1317         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1318         memset(mgmt, 0, 24);
1319         memcpy(mgmt->da, da, ETH_ALEN);
1320         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1321         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1322                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1323         else
1324                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1325         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1326                                         IEEE80211_STYPE_ACTION);
1327
1328         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1329
1330         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1331         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1332         params = (u16)(initiator << 11);        /* bit 11 initiator */
1333         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1334
1335         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1336         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1337
1338         ieee80211_sta_tx(dev, skb, 0);
1339 }
1340
1341 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1342                                         u16 initiator, u16 reason)
1343 {
1344         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1345         struct ieee80211_hw *hw = &local->hw;
1346         struct sta_info *sta;
1347         int ret, i;
1348
1349         rcu_read_lock();
1350
1351         sta = sta_info_get(local, ra);
1352         if (!sta) {
1353                 rcu_read_unlock();
1354                 return;
1355         }
1356
1357         /* check if TID is in operational state */
1358         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1359         if (sta->ampdu_mlme.tid_rx[tid].state
1360                                 != HT_AGG_STATE_OPERATIONAL) {
1361                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1362                 rcu_read_unlock();
1363                 return;
1364         }
1365         sta->ampdu_mlme.tid_rx[tid].state =
1366                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1367                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1368                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1369
1370         /* stop HW Rx aggregation. ampdu_action existence
1371          * already verified in session init so we add the BUG_ON */
1372         BUG_ON(!local->ops->ampdu_action);
1373
1374         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1375                                         ra, tid, NULL);
1376         if (ret)
1377                 printk(KERN_DEBUG "HW problem - can not stop rx "
1378                                 "aggergation for tid %d\n", tid);
1379
1380         /* shutdown timer has not expired */
1381         if (initiator != WLAN_BACK_TIMER)
1382                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1383                                         session_timer);
1384
1385         /* check if this is a self generated aggregation halt */
1386         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1387                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1388
1389         /* free the reordering buffer */
1390         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1391                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1392                         /* release the reordered frames */
1393                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1394                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1395                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1396                 }
1397         }
1398         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1399
1400         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1401         rcu_read_unlock();
1402 }
1403
1404
1405 static void ieee80211_sta_process_delba(struct net_device *dev,
1406                         struct ieee80211_mgmt *mgmt, size_t len)
1407 {
1408         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1409         struct sta_info *sta;
1410         u16 tid, params;
1411         u16 initiator;
1412         DECLARE_MAC_BUF(mac);
1413
1414         rcu_read_lock();
1415
1416         sta = sta_info_get(local, mgmt->sa);
1417         if (!sta) {
1418                 rcu_read_unlock();
1419                 return;
1420         }
1421
1422         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1423         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1424         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1425
1426 #ifdef CONFIG_MAC80211_HT_DEBUG
1427         if (net_ratelimit())
1428                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1429                         print_mac(mac, mgmt->sa),
1430                         initiator ? "recipient" : "initiator", tid,
1431                         mgmt->u.action.u.delba.reason_code);
1432 #endif /* CONFIG_MAC80211_HT_DEBUG */
1433
1434         if (initiator == WLAN_BACK_INITIATOR)
1435                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1436                                                  WLAN_BACK_INITIATOR, 0);
1437         else { /* WLAN_BACK_RECIPIENT */
1438                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1439                 sta->ampdu_mlme.tid_tx[tid].state =
1440                                 HT_AGG_STATE_OPERATIONAL;
1441                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1442                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1443                                              WLAN_BACK_RECIPIENT);
1444         }
1445         rcu_read_unlock();
1446 }
1447
1448 /*
1449  * After sending add Block Ack request we activated a timer until
1450  * add Block Ack response will arrive from the recipient.
1451  * If this timer expires sta_addba_resp_timer_expired will be executed.
1452  */
1453 void sta_addba_resp_timer_expired(unsigned long data)
1454 {
1455         /* not an elegant detour, but there is no choice as the timer passes
1456          * only one argument, and both sta_info and TID are needed, so init
1457          * flow in sta_info_create gives the TID as data, while the timer_to_id
1458          * array gives the sta through container_of */
1459         u16 tid = *(int *)data;
1460         struct sta_info *temp_sta = container_of((void *)data,
1461                 struct sta_info, timer_to_tid[tid]);
1462
1463         struct ieee80211_local *local = temp_sta->local;
1464         struct ieee80211_hw *hw = &local->hw;
1465         struct sta_info *sta;
1466         u8 *state;
1467
1468         rcu_read_lock();
1469
1470         sta = sta_info_get(local, temp_sta->addr);
1471         if (!sta) {
1472                 rcu_read_unlock();
1473                 return;
1474         }
1475
1476         state = &sta->ampdu_mlme.tid_tx[tid].state;
1477         /* check if the TID waits for addBA response */
1478         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1479         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1480                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1481                 *state = HT_AGG_STATE_IDLE;
1482                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1483                                 "expecting addBA response there", tid);
1484                 goto timer_expired_exit;
1485         }
1486
1487         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1488
1489         /* go through the state check in stop_BA_session */
1490         *state = HT_AGG_STATE_OPERATIONAL;
1491         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1492         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1493                                      WLAN_BACK_INITIATOR);
1494
1495 timer_expired_exit:
1496         rcu_read_unlock();
1497 }
1498
1499 /*
1500  * After receiving Block Ack Request (BAR) we activated a
1501  * timer after each frame arrives from the originator.
1502  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1503  */
1504 void sta_rx_agg_session_timer_expired(unsigned long data)
1505 {
1506         /* not an elegant detour, but there is no choice as the timer passes
1507          * only one argument, and verious sta_info are needed here, so init
1508          * flow in sta_info_create gives the TID as data, while the timer_to_id
1509          * array gives the sta through container_of */
1510         u8 *ptid = (u8 *)data;
1511         u8 *timer_to_id = ptid - *ptid;
1512         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1513                                          timer_to_tid[0]);
1514
1515         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1516         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1517                                          (u16)*ptid, WLAN_BACK_TIMER,
1518                                          WLAN_REASON_QSTA_TIMEOUT);
1519 }
1520
1521
1522 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1523                                    struct ieee80211_if_sta *ifsta,
1524                                    struct ieee80211_mgmt *mgmt,
1525                                    size_t len)
1526 {
1527         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1528         u16 auth_alg, auth_transaction, status_code;
1529         DECLARE_MAC_BUF(mac);
1530
1531         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1532             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1533                 printk(KERN_DEBUG "%s: authentication frame received from "
1534                        "%s, but not in authenticate state - ignored\n",
1535                        dev->name, print_mac(mac, mgmt->sa));
1536                 return;
1537         }
1538
1539         if (len < 24 + 6) {
1540                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1541                        "received from %s - ignored\n",
1542                        dev->name, len, print_mac(mac, mgmt->sa));
1543                 return;
1544         }
1545
1546         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1547             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1548                 printk(KERN_DEBUG "%s: authentication frame received from "
1549                        "unknown AP (SA=%s BSSID=%s) - "
1550                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1551                        print_mac(mac, mgmt->bssid));
1552                 return;
1553         }
1554
1555         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1556             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1557                 printk(KERN_DEBUG "%s: authentication frame received from "
1558                        "unknown BSSID (SA=%s BSSID=%s) - "
1559                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1560                        print_mac(mac, mgmt->bssid));
1561                 return;
1562         }
1563
1564         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1565         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1566         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1567
1568         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1569                "transaction=%d status=%d)\n",
1570                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1571                auth_transaction, status_code);
1572
1573         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1574                 /* IEEE 802.11 standard does not require authentication in IBSS
1575                  * networks and most implementations do not seem to use it.
1576                  * However, try to reply to authentication attempts if someone
1577                  * has actually implemented this.
1578                  * TODO: Could implement shared key authentication. */
1579                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1580                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1581                                "frame (alg=%d transaction=%d)\n",
1582                                dev->name, auth_alg, auth_transaction);
1583                         return;
1584                 }
1585                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1586         }
1587
1588         if (auth_alg != ifsta->auth_alg ||
1589             auth_transaction != ifsta->auth_transaction) {
1590                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1591                        "(alg=%d transaction=%d)\n",
1592                        dev->name, auth_alg, auth_transaction);
1593                 return;
1594         }
1595
1596         if (status_code != WLAN_STATUS_SUCCESS) {
1597                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1598                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1599                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1600                         u8 algs[3];
1601                         const int num_algs = ARRAY_SIZE(algs);
1602                         int i, pos;
1603                         algs[0] = algs[1] = algs[2] = 0xff;
1604                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1605                                 algs[0] = WLAN_AUTH_OPEN;
1606                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1607                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1608                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1609                                 algs[2] = WLAN_AUTH_LEAP;
1610                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1611                                 pos = 0;
1612                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1613                                 pos = 1;
1614                         else
1615                                 pos = 2;
1616                         for (i = 0; i < num_algs; i++) {
1617                                 pos++;
1618                                 if (pos >= num_algs)
1619                                         pos = 0;
1620                                 if (algs[pos] == ifsta->auth_alg ||
1621                                     algs[pos] == 0xff)
1622                                         continue;
1623                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1624                                     !ieee80211_sta_wep_configured(dev))
1625                                         continue;
1626                                 ifsta->auth_alg = algs[pos];
1627                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1628                                        "next try\n",
1629                                        dev->name, ifsta->auth_alg);
1630                                 break;
1631                         }
1632                 }
1633                 return;
1634         }
1635
1636         switch (ifsta->auth_alg) {
1637         case WLAN_AUTH_OPEN:
1638         case WLAN_AUTH_LEAP:
1639                 ieee80211_auth_completed(dev, ifsta);
1640                 break;
1641         case WLAN_AUTH_SHARED_KEY:
1642                 if (ifsta->auth_transaction == 4)
1643                         ieee80211_auth_completed(dev, ifsta);
1644                 else
1645                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1646                 break;
1647         }
1648 }
1649
1650
1651 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1652                                      struct ieee80211_if_sta *ifsta,
1653                                      struct ieee80211_mgmt *mgmt,
1654                                      size_t len)
1655 {
1656         u16 reason_code;
1657         DECLARE_MAC_BUF(mac);
1658
1659         if (len < 24 + 2) {
1660                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1661                        "received from %s - ignored\n",
1662                        dev->name, len, print_mac(mac, mgmt->sa));
1663                 return;
1664         }
1665
1666         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1667                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1668                        "unknown AP (SA=%s BSSID=%s) - "
1669                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1670                        print_mac(mac, mgmt->bssid));
1671                 return;
1672         }
1673
1674         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1675
1676         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1677                " (reason=%d)\n",
1678                dev->name, print_mac(mac, mgmt->sa), reason_code);
1679
1680         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1681                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1682         }
1683
1684         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1685             ifsta->state == IEEE80211_ASSOCIATE ||
1686             ifsta->state == IEEE80211_ASSOCIATED) {
1687                 ifsta->state = IEEE80211_AUTHENTICATE;
1688                 mod_timer(&ifsta->timer, jiffies +
1689                                       IEEE80211_RETRY_AUTH_INTERVAL);
1690         }
1691
1692         ieee80211_set_disassoc(dev, ifsta, 1);
1693         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1694 }
1695
1696
1697 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1698                                        struct ieee80211_if_sta *ifsta,
1699                                        struct ieee80211_mgmt *mgmt,
1700                                        size_t len)
1701 {
1702         u16 reason_code;
1703         DECLARE_MAC_BUF(mac);
1704
1705         if (len < 24 + 2) {
1706                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1707                        "received from %s - ignored\n",
1708                        dev->name, len, print_mac(mac, mgmt->sa));
1709                 return;
1710         }
1711
1712         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1713                 printk(KERN_DEBUG "%s: disassociation frame received from "
1714                        "unknown AP (SA=%s BSSID=%s) - "
1715                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1716                        print_mac(mac, mgmt->bssid));
1717                 return;
1718         }
1719
1720         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1721
1722         printk(KERN_DEBUG "%s: RX disassociation from %s"
1723                " (reason=%d)\n",
1724                dev->name, print_mac(mac, mgmt->sa), reason_code);
1725
1726         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1727                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1728
1729         if (ifsta->state == IEEE80211_ASSOCIATED) {
1730                 ifsta->state = IEEE80211_ASSOCIATE;
1731                 mod_timer(&ifsta->timer, jiffies +
1732                                       IEEE80211_RETRY_AUTH_INTERVAL);
1733         }
1734
1735         ieee80211_set_disassoc(dev, ifsta, 0);
1736 }
1737
1738
1739 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1740                                          struct ieee80211_if_sta *ifsta,
1741                                          struct ieee80211_mgmt *mgmt,
1742                                          size_t len,
1743                                          int reassoc)
1744 {
1745         struct ieee80211_local *local = sdata->local;
1746         struct net_device *dev = sdata->dev;
1747         struct ieee80211_supported_band *sband;
1748         struct sta_info *sta;
1749         u64 rates, basic_rates;
1750         u16 capab_info, status_code, aid;
1751         struct ieee802_11_elems elems;
1752         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1753         u8 *pos;
1754         int i, j;
1755         DECLARE_MAC_BUF(mac);
1756         bool have_higher_than_11mbit = false;
1757
1758         /* AssocResp and ReassocResp have identical structure, so process both
1759          * of them in this function. */
1760
1761         if (ifsta->state != IEEE80211_ASSOCIATE) {
1762                 printk(KERN_DEBUG "%s: association frame received from "
1763                        "%s, but not in associate state - ignored\n",
1764                        dev->name, print_mac(mac, mgmt->sa));
1765                 return;
1766         }
1767
1768         if (len < 24 + 6) {
1769                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1770                        "received from %s - ignored\n",
1771                        dev->name, len, print_mac(mac, mgmt->sa));
1772                 return;
1773         }
1774
1775         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1776                 printk(KERN_DEBUG "%s: association frame received from "
1777                        "unknown AP (SA=%s BSSID=%s) - "
1778                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1779                        print_mac(mac, mgmt->bssid));
1780                 return;
1781         }
1782
1783         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1784         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1785         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1786
1787         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1788                "status=%d aid=%d)\n",
1789                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1790                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1791
1792         if (status_code != WLAN_STATUS_SUCCESS) {
1793                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1794                        dev->name, status_code);
1795                 /* if this was a reassociation, ensure we try a "full"
1796                  * association next time. This works around some broken APs
1797                  * which do not correctly reject reassociation requests. */
1798                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1799                 return;
1800         }
1801
1802         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1803                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1804                        "set\n", dev->name, aid);
1805         aid &= ~(BIT(15) | BIT(14));
1806
1807         pos = mgmt->u.assoc_resp.variable;
1808         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1809
1810         if (!elems.supp_rates) {
1811                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1812                        dev->name);
1813                 return;
1814         }
1815
1816         printk(KERN_DEBUG "%s: associated\n", dev->name);
1817         ifsta->aid = aid;
1818         ifsta->ap_capab = capab_info;
1819
1820         kfree(ifsta->assocresp_ies);
1821         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1822         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1823         if (ifsta->assocresp_ies)
1824                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1825
1826         rcu_read_lock();
1827
1828         /* Add STA entry for the AP */
1829         sta = sta_info_get(local, ifsta->bssid);
1830         if (!sta) {
1831                 struct ieee80211_sta_bss *bss;
1832                 int err;
1833
1834                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1835                 if (!sta) {
1836                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1837                                " the AP\n", dev->name);
1838                         rcu_read_unlock();
1839                         return;
1840                 }
1841                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1842                                            local->hw.conf.channel->center_freq,
1843                                            ifsta->ssid, ifsta->ssid_len);
1844                 if (bss) {
1845                         sta->last_rssi = bss->rssi;
1846                         sta->last_signal = bss->signal;
1847                         sta->last_noise = bss->noise;
1848                         ieee80211_rx_bss_put(dev, bss);
1849                 }
1850
1851                 err = sta_info_insert(sta);
1852                 if (err) {
1853                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1854                                " the AP (error %d)\n", dev->name, err);
1855                         sta_info_destroy(sta);
1856                         rcu_read_unlock();
1857                         return;
1858                 }
1859         }
1860
1861         /*
1862          * FIXME: Do we really need to update the sta_info's information here?
1863          *        We already know about the AP (we found it in our list) so it
1864          *        should already be filled with the right info, no?
1865          *        As is stands, all this is racy because typically we assume
1866          *        the information that is filled in here (except flags) doesn't
1867          *        change while a STA structure is alive. As such, it should move
1868          *        to between the sta_info_alloc() and sta_info_insert() above.
1869          */
1870
1871         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1872                       WLAN_STA_AUTHORIZED;
1873
1874         rates = 0;
1875         basic_rates = 0;
1876         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1877
1878         for (i = 0; i < elems.supp_rates_len; i++) {
1879                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1880
1881                 if (rate > 110)
1882                         have_higher_than_11mbit = true;
1883
1884                 for (j = 0; j < sband->n_bitrates; j++) {
1885                         if (sband->bitrates[j].bitrate == rate)
1886                                 rates |= BIT(j);
1887                         if (elems.supp_rates[i] & 0x80)
1888                                 basic_rates |= BIT(j);
1889                 }
1890         }
1891
1892         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1893                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1894
1895                 if (rate > 110)
1896                         have_higher_than_11mbit = true;
1897
1898                 for (j = 0; j < sband->n_bitrates; j++) {
1899                         if (sband->bitrates[j].bitrate == rate)
1900                                 rates |= BIT(j);
1901                         if (elems.ext_supp_rates[i] & 0x80)
1902                                 basic_rates |= BIT(j);
1903                 }
1904         }
1905
1906         sta->supp_rates[local->hw.conf.channel->band] = rates;
1907         sdata->basic_rates = basic_rates;
1908
1909         /* cf. IEEE 802.11 9.2.12 */
1910         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1911             have_higher_than_11mbit)
1912                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1913         else
1914                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1915
1916         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1917             local->ops->conf_ht) {
1918                 struct ieee80211_ht_bss_info bss_info;
1919
1920                 ieee80211_ht_cap_ie_to_ht_info(
1921                                 (struct ieee80211_ht_cap *)
1922                                 elems.ht_cap_elem, &sta->ht_info);
1923                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1924                                 (struct ieee80211_ht_addt_info *)
1925                                 elems.ht_info_elem, &bss_info);
1926                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1927         }
1928
1929         rate_control_rate_init(sta, local);
1930
1931         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1932                 sta->flags |= WLAN_STA_WME;
1933                 rcu_read_unlock();
1934                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1935                                          elems.wmm_param_len);
1936         } else
1937                 rcu_read_unlock();
1938
1939         /* set AID, ieee80211_set_associated() will tell the driver */
1940         bss_conf->aid = aid;
1941         ieee80211_set_associated(dev, ifsta, 1);
1942
1943         ieee80211_associated(dev, ifsta);
1944 }
1945
1946
1947 /* Caller must hold local->sta_bss_lock */
1948 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1949                                         struct ieee80211_sta_bss *bss)
1950 {
1951         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1952         u8 hash_idx;
1953
1954         if (bss_mesh_cfg(bss))
1955                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
1956                                         bss_mesh_id_len(bss));
1957         else
1958                 hash_idx = STA_HASH(bss->bssid);
1959
1960         bss->hnext = local->sta_bss_hash[hash_idx];
1961         local->sta_bss_hash[hash_idx] = bss;
1962 }
1963
1964
1965 /* Caller must hold local->sta_bss_lock */
1966 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1967                                         struct ieee80211_sta_bss *bss)
1968 {
1969         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1970         struct ieee80211_sta_bss *b, *prev = NULL;
1971         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1972         while (b) {
1973                 if (b == bss) {
1974                         if (!prev)
1975                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1976                                         bss->hnext;
1977                         else
1978                                 prev->hnext = bss->hnext;
1979                         break;
1980                 }
1981                 prev = b;
1982                 b = b->hnext;
1983         }
1984 }
1985
1986
1987 static struct ieee80211_sta_bss *
1988 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1989                      u8 *ssid, u8 ssid_len)
1990 {
1991         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1992         struct ieee80211_sta_bss *bss;
1993
1994         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1995         if (!bss)
1996                 return NULL;
1997         atomic_inc(&bss->users);
1998         atomic_inc(&bss->users);
1999         memcpy(bss->bssid, bssid, ETH_ALEN);
2000         bss->freq = freq;
2001         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2002                 memcpy(bss->ssid, ssid, ssid_len);
2003                 bss->ssid_len = ssid_len;
2004         }
2005
2006         spin_lock_bh(&local->sta_bss_lock);
2007         /* TODO: order by RSSI? */
2008         list_add_tail(&bss->list, &local->sta_bss_list);
2009         __ieee80211_rx_bss_hash_add(dev, bss);
2010         spin_unlock_bh(&local->sta_bss_lock);
2011         return bss;
2012 }
2013
2014 static struct ieee80211_sta_bss *
2015 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2016                      u8 *ssid, u8 ssid_len)
2017 {
2018         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2019         struct ieee80211_sta_bss *bss;
2020
2021         spin_lock_bh(&local->sta_bss_lock);
2022         bss = local->sta_bss_hash[STA_HASH(bssid)];
2023         while (bss) {
2024                 if (!bss_mesh_cfg(bss) &&
2025                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2026                     bss->freq == freq &&
2027                     bss->ssid_len == ssid_len &&
2028                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2029                         atomic_inc(&bss->users);
2030                         break;
2031                 }
2032                 bss = bss->hnext;
2033         }
2034         spin_unlock_bh(&local->sta_bss_lock);
2035         return bss;
2036 }
2037
2038 #ifdef CONFIG_MAC80211_MESH
2039 static struct ieee80211_sta_bss *
2040 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2041                           u8 *mesh_cfg, int freq)
2042 {
2043         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2044         struct ieee80211_sta_bss *bss;
2045
2046         spin_lock_bh(&local->sta_bss_lock);
2047         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2048         while (bss) {
2049                 if (bss_mesh_cfg(bss) &&
2050                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2051                     bss->freq == freq &&
2052                     mesh_id_len == bss->mesh_id_len &&
2053                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2054                                                  mesh_id_len))) {
2055                         atomic_inc(&bss->users);
2056                         break;
2057                 }
2058                 bss = bss->hnext;
2059         }
2060         spin_unlock_bh(&local->sta_bss_lock);
2061         return bss;
2062 }
2063
2064 static struct ieee80211_sta_bss *
2065 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2066                           u8 *mesh_cfg, int freq)
2067 {
2068         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2069         struct ieee80211_sta_bss *bss;
2070
2071         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2072         if (!bss)
2073                 return NULL;
2074
2075         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2076         if (!bss->mesh_cfg) {
2077                 kfree(bss);
2078                 return NULL;
2079         }
2080
2081         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2082                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2083                 if (!bss->mesh_id) {
2084                         kfree(bss->mesh_cfg);
2085                         kfree(bss);
2086                         return NULL;
2087                 }
2088                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2089         }
2090
2091         atomic_inc(&bss->users);
2092         atomic_inc(&bss->users);
2093         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2094         bss->mesh_id_len = mesh_id_len;
2095         bss->freq = freq;
2096         spin_lock_bh(&local->sta_bss_lock);
2097         /* TODO: order by RSSI? */
2098         list_add_tail(&bss->list, &local->sta_bss_list);
2099         __ieee80211_rx_bss_hash_add(dev, bss);
2100         spin_unlock_bh(&local->sta_bss_lock);
2101         return bss;
2102 }
2103 #endif
2104
2105 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2106 {
2107         kfree(bss->wpa_ie);
2108         kfree(bss->rsn_ie);
2109         kfree(bss->wmm_ie);
2110         kfree(bss->ht_ie);
2111         kfree(bss_mesh_id(bss));
2112         kfree(bss_mesh_cfg(bss));
2113         kfree(bss);
2114 }
2115
2116
2117 static void ieee80211_rx_bss_put(struct net_device *dev,
2118                                  struct ieee80211_sta_bss *bss)
2119 {
2120         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2121         if (!atomic_dec_and_test(&bss->users))
2122                 return;
2123
2124         spin_lock_bh(&local->sta_bss_lock);
2125         __ieee80211_rx_bss_hash_del(dev, bss);
2126         list_del(&bss->list);
2127         spin_unlock_bh(&local->sta_bss_lock);
2128         ieee80211_rx_bss_free(bss);
2129 }
2130
2131
2132 void ieee80211_rx_bss_list_init(struct net_device *dev)
2133 {
2134         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2135         spin_lock_init(&local->sta_bss_lock);
2136         INIT_LIST_HEAD(&local->sta_bss_list);
2137 }
2138
2139
2140 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2141 {
2142         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2143         struct ieee80211_sta_bss *bss, *tmp;
2144
2145         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2146                 ieee80211_rx_bss_put(dev, bss);
2147 }
2148
2149
2150 static int ieee80211_sta_join_ibss(struct net_device *dev,
2151                                    struct ieee80211_if_sta *ifsta,
2152                                    struct ieee80211_sta_bss *bss)
2153 {
2154         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155         int res, rates, i, j;
2156         struct sk_buff *skb;
2157         struct ieee80211_mgmt *mgmt;
2158         struct ieee80211_tx_control control;
2159         struct rate_selection ratesel;
2160         u8 *pos;
2161         struct ieee80211_sub_if_data *sdata;
2162         struct ieee80211_supported_band *sband;
2163
2164         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2165
2166         /* Remove possible STA entries from other IBSS networks. */
2167         sta_info_flush(local, NULL);
2168
2169         if (local->ops->reset_tsf) {
2170                 /* Reset own TSF to allow time synchronization work. */
2171                 local->ops->reset_tsf(local_to_hw(local));
2172         }
2173         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2174         res = ieee80211_if_config(dev);
2175         if (res)
2176                 return res;
2177
2178         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2179
2180         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2181         sdata->drop_unencrypted = bss->capability &
2182                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2183
2184         res = ieee80211_set_freq(local, bss->freq);
2185
2186         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2187                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2188                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2189                 return -1;
2190         }
2191
2192         /* Set beacon template */
2193         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2194         do {
2195                 if (!skb)
2196                         break;
2197
2198                 skb_reserve(skb, local->hw.extra_tx_headroom);
2199
2200                 mgmt = (struct ieee80211_mgmt *)
2201                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2202                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2203                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2204                                                    IEEE80211_STYPE_BEACON);
2205                 memset(mgmt->da, 0xff, ETH_ALEN);
2206                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2207                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2208                 mgmt->u.beacon.beacon_int =
2209                         cpu_to_le16(local->hw.conf.beacon_int);
2210                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2211
2212                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2213                 *pos++ = WLAN_EID_SSID;
2214                 *pos++ = ifsta->ssid_len;
2215                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2216
2217                 rates = bss->supp_rates_len;
2218                 if (rates > 8)
2219                         rates = 8;
2220                 pos = skb_put(skb, 2 + rates);
2221                 *pos++ = WLAN_EID_SUPP_RATES;
2222                 *pos++ = rates;
2223                 memcpy(pos, bss->supp_rates, rates);
2224
2225                 if (bss->band == IEEE80211_BAND_2GHZ) {
2226                         pos = skb_put(skb, 2 + 1);
2227                         *pos++ = WLAN_EID_DS_PARAMS;
2228                         *pos++ = 1;
2229                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2230                 }
2231
2232                 pos = skb_put(skb, 2 + 2);
2233                 *pos++ = WLAN_EID_IBSS_PARAMS;
2234                 *pos++ = 2;
2235                 /* FIX: set ATIM window based on scan results */
2236                 *pos++ = 0;
2237                 *pos++ = 0;
2238
2239                 if (bss->supp_rates_len > 8) {
2240                         rates = bss->supp_rates_len - 8;
2241                         pos = skb_put(skb, 2 + rates);
2242                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2243                         *pos++ = rates;
2244                         memcpy(pos, &bss->supp_rates[8], rates);
2245                 }
2246
2247                 memset(&control, 0, sizeof(control));
2248                 rate_control_get_rate(dev, sband, skb, &ratesel);
2249                 if (!ratesel.rate) {
2250                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2251                                "for IBSS beacon\n", dev->name);
2252                         break;
2253                 }
2254                 control.vif = &sdata->vif;
2255                 control.tx_rate = ratesel.rate;
2256                 if (sdata->bss_conf.use_short_preamble &&
2257                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2258                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2259                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2260                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2261                 control.retry_limit = 1;
2262
2263                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2264                 if (ifsta->probe_resp) {
2265                         mgmt = (struct ieee80211_mgmt *)
2266                                 ifsta->probe_resp->data;
2267                         mgmt->frame_control =
2268                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2269                                              IEEE80211_STYPE_PROBE_RESP);
2270                 } else {
2271                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2272                                "template for IBSS\n", dev->name);
2273                 }
2274
2275                 if (local->ops->beacon_update &&
2276                     local->ops->beacon_update(local_to_hw(local),
2277                                              skb, &control) == 0) {
2278                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2279                                "template\n", dev->name);
2280                         skb = NULL;
2281                 }
2282
2283                 rates = 0;
2284                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2285                 for (i = 0; i < bss->supp_rates_len; i++) {
2286                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2287                         for (j = 0; j < sband->n_bitrates; j++)
2288                                 if (sband->bitrates[j].bitrate == bitrate)
2289                                         rates |= BIT(j);
2290                 }
2291                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2292         } while (0);
2293
2294         if (skb) {
2295                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2296                        "template\n", dev->name);
2297                 dev_kfree_skb(skb);
2298         }
2299
2300         ifsta->state = IEEE80211_IBSS_JOINED;
2301         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2302
2303         ieee80211_rx_bss_put(dev, bss);
2304
2305         return res;
2306 }
2307
2308 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2309                             struct ieee802_11_elems *elems,
2310                             enum ieee80211_band band)
2311 {
2312         struct ieee80211_supported_band *sband;
2313         struct ieee80211_rate *bitrates;
2314         size_t num_rates;
2315         u64 supp_rates;
2316         int i, j;
2317         sband = local->hw.wiphy->bands[band];
2318
2319         if (!sband) {
2320                 WARN_ON(1);
2321                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2322         }
2323
2324         bitrates = sband->bitrates;
2325         num_rates = sband->n_bitrates;
2326         supp_rates = 0;
2327         for (i = 0; i < elems->supp_rates_len +
2328                      elems->ext_supp_rates_len; i++) {
2329                 u8 rate = 0;
2330                 int own_rate;
2331                 if (i < elems->supp_rates_len)
2332                         rate = elems->supp_rates[i];
2333                 else if (elems->ext_supp_rates)
2334                         rate = elems->ext_supp_rates
2335                                 [i - elems->supp_rates_len];
2336                 own_rate = 5 * (rate & 0x7f);
2337                 for (j = 0; j < num_rates; j++)
2338                         if (bitrates[j].bitrate == own_rate)
2339                                 supp_rates |= BIT(j);
2340         }
2341         return supp_rates;
2342 }
2343
2344
2345 static void ieee80211_rx_bss_info(struct net_device *dev,
2346                                   struct ieee80211_mgmt *mgmt,
2347                                   size_t len,
2348                                   struct ieee80211_rx_status *rx_status,
2349                                   int beacon)
2350 {
2351         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2352         struct ieee802_11_elems elems;
2353         size_t baselen;
2354         int freq, clen;
2355         struct ieee80211_sta_bss *bss;
2356         struct sta_info *sta;
2357         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2358         u64 beacon_timestamp, rx_timestamp;
2359         DECLARE_MAC_BUF(mac);
2360         DECLARE_MAC_BUF(mac2);
2361
2362         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2363                 return; /* ignore ProbeResp to foreign address */
2364
2365 #if 0
2366         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2367                dev->name, beacon ? "Beacon" : "Probe Response",
2368                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2369 #endif
2370
2371         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2372         if (baselen > len)
2373                 return;
2374
2375         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2376         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2377
2378         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2379             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2380                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2381                                                 rx_status->band);
2382
2383                 mesh_neighbour_update(mgmt->sa, rates, dev,
2384                                       mesh_peer_accepts_plinks(&elems, dev));
2385         }
2386
2387         rcu_read_lock();
2388
2389         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2390             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2391             (sta = sta_info_get(local, mgmt->sa))) {
2392                 u64 prev_rates;
2393                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2394                                                         rx_status->band);
2395
2396                 prev_rates = sta->supp_rates[rx_status->band];
2397                 sta->supp_rates[rx_status->band] &= supp_rates;
2398                 if (sta->supp_rates[rx_status->band] == 0) {
2399                         /* No matching rates - this should not really happen.
2400                          * Make sure that at least one rate is marked
2401                          * supported to avoid issues with TX rate ctrl. */
2402                         sta->supp_rates[rx_status->band] =
2403                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2404                 }
2405                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2406                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2407                                "%s based on beacon info (0x%llx & 0x%llx -> "
2408                                "0x%llx)\n",
2409                                dev->name, print_mac(mac, sta->addr),
2410                                (unsigned long long) prev_rates,
2411                                (unsigned long long) supp_rates,
2412                                (unsigned long long) sta->supp_rates[rx_status->band]);
2413                 }
2414         }
2415
2416         rcu_read_unlock();
2417
2418         if (elems.ds_params && elems.ds_params_len == 1)
2419                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2420         else
2421                 freq = rx_status->freq;
2422
2423 #ifdef CONFIG_MAC80211_MESH
2424         if (elems.mesh_config)
2425                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2426                                 elems.mesh_id_len, elems.mesh_config, freq);
2427         else
2428 #endif
2429                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2430                                            elems.ssid, elems.ssid_len);
2431         if (!bss) {
2432 #ifdef CONFIG_MAC80211_MESH
2433                 if (elems.mesh_config)
2434                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2435                                 elems.mesh_id_len, elems.mesh_config, freq);
2436                 else
2437 #endif
2438                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2439                                                    elems.ssid, elems.ssid_len);
2440                 if (!bss)
2441                         return;
2442         } else {
2443 #if 0
2444                 /* TODO: order by RSSI? */
2445                 spin_lock_bh(&local->sta_bss_lock);
2446                 list_move_tail(&bss->list, &local->sta_bss_list);
2447                 spin_unlock_bh(&local->sta_bss_lock);
2448 #endif
2449         }
2450
2451         bss->band = rx_status->band;
2452
2453         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2454             bss->probe_resp && beacon) {
2455                 /* STA mode:
2456                  * Do not allow beacon to override data from Probe Response. */
2457                 ieee80211_rx_bss_put(dev, bss);
2458                 return;
2459         }
2460
2461         /* save the ERP value so that it is available at association time */
2462         if (elems.erp_info && elems.erp_info_len >= 1) {
2463                 bss->erp_value = elems.erp_info[0];
2464                 bss->has_erp_value = 1;
2465         }
2466
2467         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2468         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2469
2470         bss->supp_rates_len = 0;
2471         if (elems.supp_rates) {
2472                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2473                 if (clen > elems.supp_rates_len)
2474                         clen = elems.supp_rates_len;
2475                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2476                        clen);
2477                 bss->supp_rates_len += clen;
2478         }
2479         if (elems.ext_supp_rates) {
2480                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2481                 if (clen > elems.ext_supp_rates_len)
2482                         clen = elems.ext_supp_rates_len;
2483                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2484                        elems.ext_supp_rates, clen);
2485                 bss->supp_rates_len += clen;
2486         }
2487
2488         if (elems.wpa &&
2489             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2490              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2491                 kfree(bss->wpa_ie);
2492                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2493                 if (bss->wpa_ie) {
2494                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2495                         bss->wpa_ie_len = elems.wpa_len + 2;
2496                 } else
2497                         bss->wpa_ie_len = 0;
2498         } else if (!elems.wpa && bss->wpa_ie) {
2499                 kfree(bss->wpa_ie);
2500                 bss->wpa_ie = NULL;
2501                 bss->wpa_ie_len = 0;
2502         }
2503
2504         if (elems.rsn &&
2505             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2506              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2507                 kfree(bss->rsn_ie);
2508                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2509                 if (bss->rsn_ie) {
2510                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2511                         bss->rsn_ie_len = elems.rsn_len + 2;
2512                 } else
2513                         bss->rsn_ie_len = 0;
2514         } else if (!elems.rsn && bss->rsn_ie) {
2515                 kfree(bss->rsn_ie);
2516                 bss->rsn_ie = NULL;
2517                 bss->rsn_ie_len = 0;
2518         }
2519
2520         if (elems.wmm_param &&
2521             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2522              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2523                 kfree(bss->wmm_ie);
2524                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2525                 if (bss->wmm_ie) {
2526                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2527                                elems.wmm_param_len + 2);
2528                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2529                 } else
2530                         bss->wmm_ie_len = 0;
2531         } else if (!elems.wmm_param && bss->wmm_ie) {
2532                 kfree(bss->wmm_ie);
2533                 bss->wmm_ie = NULL;
2534                 bss->wmm_ie_len = 0;
2535         }
2536         if (elems.ht_cap_elem &&
2537             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2538              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2539                 kfree(bss->ht_ie);
2540                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2541                 if (bss->ht_ie) {
2542                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2543                                elems.ht_cap_elem_len + 2);
2544                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2545                 } else
2546                         bss->ht_ie_len = 0;
2547         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2548                 kfree(bss->ht_ie);
2549                 bss->ht_ie = NULL;
2550                 bss->ht_ie_len = 0;
2551         }
2552
2553         bss->timestamp = beacon_timestamp;
2554         bss->last_update = jiffies;
2555         bss->rssi = rx_status->ssi;
2556         bss->signal = rx_status->signal;
2557         bss->noise = rx_status->noise;
2558         if (!beacon)
2559                 bss->probe_resp++;
2560
2561         /* check if we need to merge IBSS */
2562         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2563             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2564             bss->capability & WLAN_CAPABILITY_IBSS &&
2565             bss->freq == local->oper_channel->center_freq &&
2566             elems.ssid_len == sdata->u.sta.ssid_len &&
2567             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2568                 if (rx_status->flag & RX_FLAG_TSFT) {
2569                         /* in order for correct IBSS merging we need mactime
2570                          *
2571                          * since mactime is defined as the time the first data
2572                          * symbol of the frame hits the PHY, and the timestamp
2573                          * of the beacon is defined as "the time that the data
2574                          * symbol containing the first bit of the timestamp is
2575                          * transmitted to the PHY plus the transmitting STA’s
2576                          * delays through its local PHY from the MAC-PHY
2577                          * interface to its interface with the WM"
2578                          * (802.11 11.1.2) - equals the time this bit arrives at
2579                          * the receiver - we have to take into account the
2580                          * offset between the two.
2581                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2582                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2583                          */
2584                         int rate = local->hw.wiphy->bands[rx_status->band]->
2585                                         bitrates[rx_status->rate_idx].bitrate;
2586                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2587                 } else if (local && local->ops && local->ops->get_tsf)
2588                         /* second best option: get current TSF */
2589                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2590                 else
2591                         /* can't merge without knowing the TSF */
2592                         rx_timestamp = -1LLU;
2593 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2594                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2595                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2596                        print_mac(mac, mgmt->sa),
2597                        print_mac(mac2, mgmt->bssid),
2598                        (unsigned long long)rx_timestamp,
2599                        (unsigned long long)beacon_timestamp,
2600                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2601                        jiffies);
2602 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2603                 if (beacon_timestamp > rx_timestamp) {
2604 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2605                         if (net_ratelimit())
2606 #endif
2607                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2608                                        "local TSF - IBSS merge with BSSID %s\n",
2609                                        dev->name, print_mac(mac, mgmt->bssid));
2610                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2611                         ieee80211_ibss_add_sta(dev, NULL,
2612                                                mgmt->bssid, mgmt->sa);
2613                 }
2614         }
2615
2616         ieee80211_rx_bss_put(dev, bss);
2617 }
2618
2619
2620 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2621                                          struct ieee80211_mgmt *mgmt,
2622                                          size_t len,
2623                                          struct ieee80211_rx_status *rx_status)
2624 {
2625         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2626 }
2627
2628
2629 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2630                                      struct ieee80211_mgmt *mgmt,
2631                                      size_t len,
2632                                      struct ieee80211_rx_status *rx_status)
2633 {
2634         struct ieee80211_sub_if_data *sdata;
2635         struct ieee80211_if_sta *ifsta;
2636         size_t baselen;
2637         struct ieee802_11_elems elems;
2638         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2639         struct ieee80211_conf *conf = &local->hw.conf;
2640         u32 changed = 0;
2641
2642         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2643
2644         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2645         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2646                 return;
2647         ifsta = &sdata->u.sta;
2648
2649         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2650             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2651                 return;
2652
2653         /* Process beacon from the current BSS */
2654         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2655         if (baselen > len)
2656                 return;
2657
2658         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2659
2660         if (elems.erp_info && elems.erp_info_len >= 1)
2661                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2662
2663         if (elems.ht_cap_elem && elems.ht_info_elem &&
2664             elems.wmm_param && local->ops->conf_ht &&
2665             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2666                 struct ieee80211_ht_bss_info bss_info;
2667
2668                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2669                                 (struct ieee80211_ht_addt_info *)
2670                                 elems.ht_info_elem, &bss_info);
2671                 /* check if AP changed bss inforamation */
2672                 if ((conf->ht_bss_conf.primary_channel !=
2673                      bss_info.primary_channel) ||
2674                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2675                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2676                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2677                                                 &bss_info);
2678         }
2679
2680         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2681                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2682                                          elems.wmm_param_len);
2683         }
2684
2685         ieee80211_bss_info_change_notify(sdata, changed);
2686 }
2687
2688
2689 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2690                                         struct ieee80211_if_sta *ifsta,
2691                                         struct ieee80211_mgmt *mgmt,
2692                                         size_t len,
2693                                         struct ieee80211_rx_status *rx_status)
2694 {
2695         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2696         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2697         int tx_last_beacon;
2698         struct sk_buff *skb;
2699         struct ieee80211_mgmt *resp;
2700         u8 *pos, *end;
2701         DECLARE_MAC_BUF(mac);
2702 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2703         DECLARE_MAC_BUF(mac2);
2704         DECLARE_MAC_BUF(mac3);
2705 #endif
2706
2707         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2708             ifsta->state != IEEE80211_IBSS_JOINED ||
2709             len < 24 + 2 || !ifsta->probe_resp)
2710                 return;
2711
2712         if (local->ops->tx_last_beacon)
2713                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2714         else
2715                 tx_last_beacon = 1;
2716
2717 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2718         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2719                "%s (tx_last_beacon=%d)\n",
2720                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2721                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2722 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2723
2724         if (!tx_last_beacon)
2725                 return;
2726
2727         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2728             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2729                 return;
2730
2731         end = ((u8 *) mgmt) + len;
2732         pos = mgmt->u.probe_req.variable;
2733         if (pos[0] != WLAN_EID_SSID ||
2734             pos + 2 + pos[1] > end) {
2735                 if (net_ratelimit()) {
2736                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2737                                "from %s\n",
2738                                dev->name, print_mac(mac, mgmt->sa));
2739                 }
2740                 return;
2741         }
2742         if (pos[1] != 0 &&
2743             (pos[1] != ifsta->ssid_len ||
2744              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2745                 /* Ignore ProbeReq for foreign SSID */
2746                 return;
2747         }
2748
2749         /* Reply with ProbeResp */
2750         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2751         if (!skb)
2752                 return;
2753
2754         resp = (struct ieee80211_mgmt *) skb->data;
2755         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2756 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2757         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2758                dev->name, print_mac(mac, resp->da));
2759 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2760         ieee80211_sta_tx(dev, skb, 0);
2761 }
2762
2763 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2764                                      struct ieee80211_if_sta *ifsta,
2765                                      struct ieee80211_mgmt *mgmt,
2766                                      size_t len,
2767                                      struct ieee80211_rx_status *rx_status)
2768 {
2769         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2770
2771         if (len < IEEE80211_MIN_ACTION_SIZE)
2772                 return;
2773
2774         switch (mgmt->u.action.category) {
2775         case WLAN_CATEGORY_BACK:
2776                 switch (mgmt->u.action.u.addba_req.action_code) {
2777                 case WLAN_ACTION_ADDBA_REQ:
2778                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2779                                    sizeof(mgmt->u.action.u.addba_req)))
2780                                 break;
2781                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2782                         break;
2783                 case WLAN_ACTION_ADDBA_RESP:
2784                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2785                                    sizeof(mgmt->u.action.u.addba_resp)))
2786                                 break;
2787                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2788                         break;
2789                 case WLAN_ACTION_DELBA:
2790                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2791                                    sizeof(mgmt->u.action.u.delba)))
2792                                 break;
2793                         ieee80211_sta_process_delba(dev, mgmt, len);
2794                         break;
2795                 default:
2796                         if (net_ratelimit())
2797                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2798                                         dev->name);
2799                         break;
2800                 }
2801                 break;
2802         case PLINK_CATEGORY:
2803                 if (ieee80211_vif_is_mesh(&sdata->vif))
2804                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2805                 break;
2806         case MESH_PATH_SEL_CATEGORY:
2807                 if (ieee80211_vif_is_mesh(&sdata->vif))
2808                         mesh_rx_path_sel_frame(dev, mgmt, len);
2809                 break;
2810         default:
2811                 if (net_ratelimit())
2812                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
2813                         "category=%d\n", dev->name, mgmt->u.action.category);
2814                 break;
2815         }
2816 }
2817
2818 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2819                            struct ieee80211_rx_status *rx_status)
2820 {
2821         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2822         struct ieee80211_sub_if_data *sdata;
2823         struct ieee80211_if_sta *ifsta;
2824         struct ieee80211_mgmt *mgmt;
2825         u16 fc;
2826
2827         if (skb->len < 24)
2828                 goto fail;
2829
2830         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2831         ifsta = &sdata->u.sta;
2832
2833         mgmt = (struct ieee80211_mgmt *) skb->data;
2834         fc = le16_to_cpu(mgmt->frame_control);
2835
2836         switch (fc & IEEE80211_FCTL_STYPE) {
2837         case IEEE80211_STYPE_PROBE_REQ:
2838         case IEEE80211_STYPE_PROBE_RESP:
2839         case IEEE80211_STYPE_BEACON:
2840         case IEEE80211_STYPE_ACTION:
2841                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2842         case IEEE80211_STYPE_AUTH:
2843         case IEEE80211_STYPE_ASSOC_RESP:
2844         case IEEE80211_STYPE_REASSOC_RESP:
2845         case IEEE80211_STYPE_DEAUTH:
2846         case IEEE80211_STYPE_DISASSOC:
2847                 skb_queue_tail(&ifsta->skb_queue, skb);
2848                 queue_work(local->hw.workqueue, &ifsta->work);
2849                 return;
2850         default:
2851                 printk(KERN_DEBUG "%s: received unknown management frame - "
2852                        "stype=%d\n", dev->name,
2853                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2854                 break;
2855         }
2856
2857  fail:
2858         kfree_skb(skb);
2859 }
2860
2861
2862 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2863                                          struct sk_buff *skb)
2864 {
2865         struct ieee80211_rx_status *rx_status;
2866         struct ieee80211_sub_if_data *sdata;
2867         struct ieee80211_if_sta *ifsta;
2868         struct ieee80211_mgmt *mgmt;
2869         u16 fc;
2870
2871         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2872         ifsta = &sdata->u.sta;
2873
2874         rx_status = (struct ieee80211_rx_status *) skb->cb;
2875         mgmt = (struct ieee80211_mgmt *) skb->data;
2876         fc = le16_to_cpu(mgmt->frame_control);
2877
2878         switch (fc & IEEE80211_FCTL_STYPE) {
2879         case IEEE80211_STYPE_PROBE_REQ:
2880                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2881                                             rx_status);
2882                 break;
2883         case IEEE80211_STYPE_PROBE_RESP:
2884                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2885                 break;
2886         case IEEE80211_STYPE_BEACON:
2887                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2888                 break;
2889         case IEEE80211_STYPE_AUTH:
2890                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2891                 break;
2892         case IEEE80211_STYPE_ASSOC_RESP:
2893                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2894                 break;
2895         case IEEE80211_STYPE_REASSOC_RESP:
2896                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2897                 break;
2898         case IEEE80211_STYPE_DEAUTH:
2899                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2900                 break;
2901         case IEEE80211_STYPE_DISASSOC:
2902                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2903                 break;
2904         case IEEE80211_STYPE_ACTION:
2905                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
2906                 break;
2907         }
2908
2909         kfree_skb(skb);
2910 }
2911
2912
2913 ieee80211_rx_result
2914 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2915                       struct ieee80211_rx_status *rx_status)
2916 {
2917         struct ieee80211_mgmt *mgmt;
2918         u16 fc;
2919
2920         if (skb->len < 2)
2921                 return RX_DROP_UNUSABLE;
2922
2923         mgmt = (struct ieee80211_mgmt *) skb->data;
2924         fc = le16_to_cpu(mgmt->frame_control);
2925
2926         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2927                 return RX_CONTINUE;
2928
2929         if (skb->len < 24)
2930                 return RX_DROP_MONITOR;
2931
2932         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2933                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2934                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2935                                                      skb->len, rx_status);
2936                         dev_kfree_skb(skb);
2937                         return RX_QUEUED;
2938                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2939                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2940                                                  rx_status);
2941                         dev_kfree_skb(skb);
2942                         return RX_QUEUED;
2943                 }
2944         }
2945         return RX_CONTINUE;
2946 }
2947
2948
2949 static int ieee80211_sta_active_ibss(struct net_device *dev)
2950 {
2951         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2952         int active = 0;
2953         struct sta_info *sta;
2954         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2955
2956         rcu_read_lock();
2957
2958         list_for_each_entry_rcu(sta, &local->sta_list, list) {
2959                 if (sta->sdata == sdata &&
2960                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2961                                jiffies)) {
2962                         active++;
2963                         break;
2964                 }
2965         }
2966
2967         rcu_read_unlock();
2968
2969         return active;
2970 }
2971
2972
2973 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
2974 {
2975         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2976         struct sta_info *sta, *tmp;
2977         LIST_HEAD(tmp_list);
2978         DECLARE_MAC_BUF(mac);
2979         unsigned long flags;
2980
2981         spin_lock_irqsave(&local->sta_lock, flags);
2982         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2983                 if (time_after(jiffies, sta->last_rx + exp_time)) {
2984                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2985                                dev->name, print_mac(mac, sta->addr));
2986                         sta_info_unlink(&sta);
2987                         if (sta)
2988                                 list_add(&sta->list, &tmp_list);
2989                 }
2990         spin_unlock_irqrestore(&local->sta_lock, flags);
2991
2992         synchronize_rcu();
2993
2994         rtnl_lock();
2995         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
2996                 sta_info_destroy(sta);
2997         rtnl_unlock();
2998 }
2999
3000
3001 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3002                                      struct ieee80211_if_sta *ifsta)
3003 {
3004         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3005
3006         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3007         if (ieee80211_sta_active_ibss(dev))
3008                 return;
3009
3010         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3011                "IBSS networks with same SSID (merge)\n", dev->name);
3012         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3013 }
3014
3015
3016 #ifdef CONFIG_MAC80211_MESH
3017 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3018                            struct ieee80211_if_sta *ifsta)
3019 {
3020         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3021         bool free_plinks;
3022
3023         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3024         mesh_path_expire(dev);
3025
3026         free_plinks = mesh_plink_availables(sdata);
3027         if (free_plinks != sdata->u.sta.accepting_plinks)
3028                 ieee80211_if_config_beacon(dev);
3029
3030         mod_timer(&ifsta->timer, jiffies +
3031                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3032 }
3033
3034
3035 void ieee80211_start_mesh(struct net_device *dev)
3036 {
3037         struct ieee80211_if_sta *ifsta;
3038         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3039         ifsta = &sdata->u.sta;
3040         ifsta->state = IEEE80211_MESH_UP;
3041         ieee80211_sta_timer((unsigned long)sdata);
3042 }
3043 #endif
3044
3045
3046 void ieee80211_sta_timer(unsigned long data)
3047 {
3048         struct ieee80211_sub_if_data *sdata =
3049                 (struct ieee80211_sub_if_data *) data;
3050         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3051         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3052
3053         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3054         queue_work(local->hw.workqueue, &ifsta->work);
3055 }
3056
3057 void ieee80211_sta_work(struct work_struct *work)
3058 {
3059         struct ieee80211_sub_if_data *sdata =
3060                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3061         struct net_device *dev = sdata->dev;
3062         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3063         struct ieee80211_if_sta *ifsta;
3064         struct sk_buff *skb;
3065
3066         if (!netif_running(dev))
3067                 return;
3068
3069         if (local->sta_sw_scanning || local->sta_hw_scanning)
3070                 return;
3071
3072         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3073             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3074             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3075                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3076                        "(type=%d)\n", dev->name, sdata->vif.type);
3077                 return;
3078         }
3079         ifsta = &sdata->u.sta;
3080
3081         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3082                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3083
3084 #ifdef CONFIG_MAC80211_MESH
3085         if (ifsta->preq_queue_len &&
3086             time_after(jiffies,
3087                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3088                 mesh_path_start_discovery(dev);
3089 #endif
3090
3091         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3092             ifsta->state != IEEE80211_ASSOCIATE &&
3093             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3094                 if (ifsta->scan_ssid_len)
3095                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3096                 else
3097                         ieee80211_sta_start_scan(dev, NULL, 0);
3098                 return;
3099         }
3100
3101         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3102                 if (ieee80211_sta_config_auth(dev, ifsta))
3103                         return;
3104                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3105         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3106                 return;
3107
3108         switch (ifsta->state) {
3109         case IEEE80211_DISABLED:
3110                 break;
3111         case IEEE80211_AUTHENTICATE:
3112                 ieee80211_authenticate(dev, ifsta);
3113                 break;
3114         case IEEE80211_ASSOCIATE:
3115                 ieee80211_associate(dev, ifsta);
3116                 break;
3117         case IEEE80211_ASSOCIATED:
3118                 ieee80211_associated(dev, ifsta);
3119                 break;
3120         case IEEE80211_IBSS_SEARCH:
3121                 ieee80211_sta_find_ibss(dev, ifsta);
3122                 break;
3123         case IEEE80211_IBSS_JOINED:
3124                 ieee80211_sta_merge_ibss(dev, ifsta);
3125                 break;
3126 #ifdef CONFIG_MAC80211_MESH
3127         case IEEE80211_MESH_UP:
3128                 ieee80211_mesh_housekeeping(dev, ifsta);
3129                 break;
3130 #endif
3131         default:
3132                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3133                        ifsta->state);
3134                 break;
3135         }
3136
3137         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3138                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3139                        "mixed-cell disabled - disassociate\n", dev->name);
3140
3141                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3142                 ieee80211_set_disassoc(dev, ifsta, 0);
3143         }
3144 }
3145
3146
3147 static void ieee80211_sta_reset_auth(struct net_device *dev,
3148                                      struct ieee80211_if_sta *ifsta)
3149 {
3150         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3151
3152         if (local->ops->reset_tsf) {
3153                 /* Reset own TSF to allow time synchronization work. */
3154                 local->ops->reset_tsf(local_to_hw(local));
3155         }
3156
3157         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3158
3159
3160         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3161                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3162         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3163                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3164         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3165                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3166         else
3167                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3168         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3169                ifsta->auth_alg);
3170         ifsta->auth_transaction = -1;
3171         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3172         ifsta->auth_tries = ifsta->assoc_tries = 0;
3173         netif_carrier_off(dev);
3174 }
3175
3176
3177 void ieee80211_sta_req_auth(struct net_device *dev,
3178                             struct ieee80211_if_sta *ifsta)
3179 {
3180         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3181         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3182
3183         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3184                 return;
3185
3186         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3187                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3188             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3189                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3190                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3191                 queue_work(local->hw.workqueue, &ifsta->work);
3192         }
3193 }
3194
3195 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3196                                     const char *ssid, int ssid_len)
3197 {
3198         int tmp, hidden_ssid;
3199
3200         if (ssid_len == ifsta->ssid_len &&
3201             !memcmp(ifsta->ssid, ssid, ssid_len))
3202                 return 1;
3203
3204         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3205                 return 0;
3206
3207         hidden_ssid = 1;
3208         tmp = ssid_len;
3209         while (tmp--) {
3210                 if (ssid[tmp] != '\0') {
3211                         hidden_ssid = 0;
3212                         break;
3213                 }
3214         }
3215
3216         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3217                 return 1;
3218
3219         if (ssid_len == 1 && ssid[0] == ' ')
3220                 return 1;
3221
3222         return 0;
3223 }
3224
3225 static int ieee80211_sta_config_auth(struct net_device *dev,
3226                                      struct ieee80211_if_sta *ifsta)
3227 {
3228         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3229         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3230         struct ieee80211_sta_bss *bss, *selected = NULL;
3231         int top_rssi = 0, freq;
3232
3233         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3234             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3235                 ifsta->state = IEEE80211_AUTHENTICATE;
3236                 ieee80211_sta_reset_auth(dev, ifsta);
3237                 return 0;
3238         }
3239
3240         spin_lock_bh(&local->sta_bss_lock);
3241         freq = local->oper_channel->center_freq;
3242         list_for_each_entry(bss, &local->sta_bss_list, list) {
3243                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3244                         continue;
3245
3246                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3247                     !!sdata->default_key)
3248                         continue;
3249
3250                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3251                     bss->freq != freq)
3252                         continue;
3253
3254                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3255                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3256                         continue;
3257
3258                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3259                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3260                         continue;
3261
3262                 if (!selected || top_rssi < bss->rssi) {
3263                         selected = bss;
3264                         top_rssi = bss->rssi;
3265                 }
3266         }
3267         if (selected)
3268                 atomic_inc(&selected->users);
3269         spin_unlock_bh(&local->sta_bss_lock);
3270
3271         if (selected) {
3272                 ieee80211_set_freq(local, selected->freq);
3273                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3274                         ieee80211_sta_set_ssid(dev, selected->ssid,
3275                                                selected->ssid_len);
3276                 ieee80211_sta_set_bssid(dev, selected->bssid);
3277                 ieee80211_rx_bss_put(dev, selected);
3278                 ifsta->state = IEEE80211_AUTHENTICATE;
3279                 ieee80211_sta_reset_auth(dev, ifsta);
3280                 return 0;
3281         } else {
3282                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3283                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3284                                 ieee80211_sta_start_scan(dev, NULL, 0);
3285                         else
3286                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3287                                                          ifsta->ssid_len);
3288                         ifsta->state = IEEE80211_AUTHENTICATE;
3289                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3290                 } else
3291                         ifsta->state = IEEE80211_DISABLED;
3292         }
3293         return -1;
3294 }
3295
3296
3297 static int ieee80211_sta_create_ibss(struct net_device *dev,
3298                                      struct ieee80211_if_sta *ifsta)
3299 {
3300         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3301         struct ieee80211_sta_bss *bss;
3302         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3303         struct ieee80211_supported_band *sband;
3304         u8 bssid[ETH_ALEN], *pos;
3305         int i;
3306         DECLARE_MAC_BUF(mac);
3307
3308 #if 0
3309         /* Easier testing, use fixed BSSID. */
3310         memset(bssid, 0xfe, ETH_ALEN);
3311 #else
3312         /* Generate random, not broadcast, locally administered BSSID. Mix in
3313          * own MAC address to make sure that devices that do not have proper
3314          * random number generator get different BSSID. */
3315         get_random_bytes(bssid, ETH_ALEN);
3316         for (i = 0; i < ETH_ALEN; i++)
3317                 bssid[i] ^= dev->dev_addr[i];
3318         bssid[0] &= ~0x01;
3319         bssid[0] |= 0x02;
3320 #endif
3321
3322         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3323                dev->name, print_mac(mac, bssid));
3324
3325         bss = ieee80211_rx_bss_add(dev, bssid,
3326                                    local->hw.conf.channel->center_freq,
3327                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3328         if (!bss)
3329                 return -ENOMEM;
3330
3331         bss->band = local->hw.conf.channel->band;
3332         sband = local->hw.wiphy->bands[bss->band];
3333
3334         if (local->hw.conf.beacon_int == 0)
3335                 local->hw.conf.beacon_int = 10000;
3336         bss->beacon_int = local->hw.conf.beacon_int;
3337         bss->last_update = jiffies;
3338         bss->capability = WLAN_CAPABILITY_IBSS;
3339         if (sdata->default_key) {
3340                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3341         } else
3342                 sdata->drop_unencrypted = 0;
3343         bss->supp_rates_len = sband->n_bitrates;
3344         pos = bss->supp_rates;
3345         for (i = 0; i < sband->n_bitrates; i++) {
3346                 int rate = sband->bitrates[i].bitrate;
3347                 *pos++ = (u8) (rate / 5);
3348         }
3349
3350         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3351 }
3352
3353
3354 static int ieee80211_sta_find_ibss(struct net_device *dev,
3355                                    struct ieee80211_if_sta *ifsta)
3356 {
3357         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3358         struct ieee80211_sta_bss *bss;
3359         int found = 0;
3360         u8 bssid[ETH_ALEN];
3361         int active_ibss;
3362         DECLARE_MAC_BUF(mac);
3363         DECLARE_MAC_BUF(mac2);
3364
3365         if (ifsta->ssid_len == 0)
3366                 return -EINVAL;
3367
3368         active_ibss = ieee80211_sta_active_ibss(dev);
3369 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3370         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3371                dev->name, active_ibss);
3372 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3373         spin_lock_bh(&local->sta_bss_lock);
3374         list_for_each_entry(bss, &local->sta_bss_list, list) {
3375                 if (ifsta->ssid_len != bss->ssid_len ||
3376                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3377                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3378                         continue;
3379 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3380                 printk(KERN_DEBUG "   bssid=%s found\n",
3381                        print_mac(mac, bss->bssid));
3382 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3383                 memcpy(bssid, bss->bssid, ETH_ALEN);
3384                 found = 1;
3385                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3386                         break;
3387         }
3388         spin_unlock_bh(&local->sta_bss_lock);
3389
3390 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3391         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3392                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3393 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3394         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3395             (bss = ieee80211_rx_bss_get(dev, bssid,
3396                                         local->hw.conf.channel->center_freq,
3397                                         ifsta->ssid, ifsta->ssid_len))) {
3398                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3399                        " based on configured SSID\n",
3400                        dev->name, print_mac(mac, bssid));
3401                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3402         }
3403 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3404         printk(KERN_DEBUG "   did not try to join ibss\n");
3405 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3406
3407         /* Selected IBSS not found in current scan results - try to scan */
3408         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3409             !ieee80211_sta_active_ibss(dev)) {
3410                 mod_timer(&ifsta->timer, jiffies +
3411                                       IEEE80211_IBSS_MERGE_INTERVAL);
3412         } else if (time_after(jiffies, local->last_scan_completed +
3413                               IEEE80211_SCAN_INTERVAL)) {
3414                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3415                        "join\n", dev->name);
3416                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3417                                               ifsta->ssid_len);
3418         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3419                 int interval = IEEE80211_SCAN_INTERVAL;
3420
3421                 if (time_after(jiffies, ifsta->ibss_join_req +
3422                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3423                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3424                             (!(local->oper_channel->flags &
3425                                         IEEE80211_CHAN_NO_IBSS)))
3426                                 return ieee80211_sta_create_ibss(dev, ifsta);
3427                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3428                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3429                                        " %d MHz\n", dev->name,
3430                                        local->hw.conf.channel->center_freq);
3431                         }
3432
3433                         /* No IBSS found - decrease scan interval and continue
3434                          * scanning. */
3435                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3436                 }
3437
3438                 ifsta->state = IEEE80211_IBSS_SEARCH;
3439                 mod_timer(&ifsta->timer, jiffies + interval);
3440                 return 0;
3441         }
3442
3443         return 0;
3444 }
3445
3446
3447 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3448 {
3449         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3450         struct ieee80211_if_sta *ifsta;
3451         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3452
3453         if (len > IEEE80211_MAX_SSID_LEN)
3454                 return -EINVAL;
3455
3456         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3457          * not defined. */
3458         if (local->ops->conf_tx) {
3459                 struct ieee80211_tx_queue_params qparam;
3460                 int i;
3461
3462                 memset(&qparam, 0, sizeof(qparam));
3463
3464                 qparam.aifs = 2;
3465
3466                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3467                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3468                         qparam.cw_min = 31;
3469                 else
3470                         qparam.cw_min = 15;
3471
3472                 qparam.cw_max = 1023;
3473                 qparam.txop = 0;
3474
3475                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3476                         local->ops->conf_tx(local_to_hw(local),
3477                                            i + IEEE80211_TX_QUEUE_DATA0,
3478                                            &qparam);
3479
3480                 /* IBSS uses different parameters for Beacon sending */
3481                 qparam.cw_min++;
3482                 qparam.cw_min *= 2;
3483                 qparam.cw_min--;
3484                 local->ops->conf_tx(local_to_hw(local),
3485                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
3486         }
3487
3488         ifsta = &sdata->u.sta;
3489
3490         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3491                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3492         memcpy(ifsta->ssid, ssid, len);
3493         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3494         ifsta->ssid_len = len;
3495
3496         if (len)
3497                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3498         else
3499                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3500         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3501             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3502                 ifsta->ibss_join_req = jiffies;
3503                 ifsta->state = IEEE80211_IBSS_SEARCH;
3504                 return ieee80211_sta_find_ibss(dev, ifsta);
3505         }
3506         return 0;
3507 }
3508
3509
3510 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3511 {
3512         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3513         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3514         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3515         *len = ifsta->ssid_len;
3516         return 0;
3517 }
3518
3519
3520 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3521 {
3522         struct ieee80211_sub_if_data *sdata;
3523         struct ieee80211_if_sta *ifsta;
3524         int res;
3525
3526         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3527         ifsta = &sdata->u.sta;
3528
3529         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3530                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3531                 res = ieee80211_if_config(dev);
3532                 if (res) {
3533                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3534                                "the low-level driver\n", dev->name);
3535                         return res;
3536                 }
3537         }
3538
3539         if (is_valid_ether_addr(bssid))
3540                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3541         else
3542                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3543
3544         return 0;
3545 }
3546
3547
3548 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3549                                     struct ieee80211_sub_if_data *sdata,
3550                                     int powersave)
3551 {
3552         struct sk_buff *skb;
3553         struct ieee80211_hdr *nullfunc;
3554         u16 fc;
3555
3556         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3557         if (!skb) {
3558                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3559                        "frame\n", sdata->dev->name);
3560                 return;
3561         }
3562         skb_reserve(skb, local->hw.extra_tx_headroom);
3563
3564         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3565         memset(nullfunc, 0, 24);
3566         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3567              IEEE80211_FCTL_TODS;
3568         if (powersave)
3569                 fc |= IEEE80211_FCTL_PM;
3570         nullfunc->frame_control = cpu_to_le16(fc);
3571         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3572         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3573         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3574
3575         ieee80211_sta_tx(sdata->dev, skb, 0);
3576 }
3577
3578
3579 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3580 {
3581         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3582             ieee80211_vif_is_mesh(&sdata->vif))
3583                 ieee80211_sta_timer((unsigned long)sdata);
3584 }
3585
3586 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3587 {
3588         struct ieee80211_local *local = hw_to_local(hw);
3589         struct net_device *dev = local->scan_dev;
3590         struct ieee80211_sub_if_data *sdata;
3591         union iwreq_data wrqu;
3592
3593         local->last_scan_completed = jiffies;
3594         memset(&wrqu, 0, sizeof(wrqu));
3595         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3596
3597         if (local->sta_hw_scanning) {
3598                 local->sta_hw_scanning = 0;
3599                 /* Restart STA timer for HW scan case */
3600                 rcu_read_lock();
3601                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3602                         ieee80211_restart_sta_timer(sdata);
3603                 rcu_read_unlock();
3604
3605                 goto done;
3606         }
3607
3608         local->sta_sw_scanning = 0;
3609         if (ieee80211_hw_config(local))
3610                 printk(KERN_DEBUG "%s: failed to restore operational "
3611                        "channel after scan\n", dev->name);
3612
3613
3614         netif_tx_lock_bh(local->mdev);
3615         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3616         local->ops->configure_filter(local_to_hw(local),
3617                                      FIF_BCN_PRBRESP_PROMISC,
3618                                      &local->filter_flags,
3619                                      local->mdev->mc_count,
3620                                      local->mdev->mc_list);
3621
3622         netif_tx_unlock_bh(local->mdev);
3623
3624         rcu_read_lock();
3625         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3626
3627                 /* No need to wake the master device. */
3628                 if (sdata->dev == local->mdev)
3629                         continue;
3630
3631                 /* Tell AP we're back */
3632                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3633                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3634                         ieee80211_send_nullfunc(local, sdata, 0);
3635
3636                 ieee80211_restart_sta_timer(sdata);
3637
3638                 netif_wake_queue(sdata->dev);
3639         }
3640         rcu_read_unlock();
3641
3642 done:
3643         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3644         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3645                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3646                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3647                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3648                     !ieee80211_sta_active_ibss(dev)))
3649                         ieee80211_sta_find_ibss(dev, ifsta);
3650         }
3651 }
3652 EXPORT_SYMBOL(ieee80211_scan_completed);
3653
3654 void ieee80211_sta_scan_work(struct work_struct *work)
3655 {
3656         struct ieee80211_local *local =
3657                 container_of(work, struct ieee80211_local, scan_work.work);
3658         struct net_device *dev = local->scan_dev;
3659         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3660         struct ieee80211_supported_band *sband;
3661         struct ieee80211_channel *chan;
3662         int skip;
3663         unsigned long next_delay = 0;
3664
3665         if (!local->sta_sw_scanning)
3666                 return;
3667
3668         switch (local->scan_state) {
3669         case SCAN_SET_CHANNEL:
3670                 /*
3671                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3672                  * after we successfully scanned the last channel of the last
3673                  * band (and the last band is supported by the hw)
3674                  */
3675                 if (local->scan_band < IEEE80211_NUM_BANDS)
3676                         sband = local->hw.wiphy->bands[local->scan_band];
3677                 else
3678                         sband = NULL;
3679
3680                 /*
3681                  * If we are at an unsupported band and have more bands
3682                  * left to scan, advance to the next supported one.
3683                  */
3684                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3685                         local->scan_band++;
3686                         sband = local->hw.wiphy->bands[local->scan_band];
3687                         local->scan_channel_idx = 0;
3688                 }
3689
3690                 /* if no more bands/channels left, complete scan */
3691                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3692                         ieee80211_scan_completed(local_to_hw(local));
3693                         return;
3694                 }
3695                 skip = 0;
3696                 chan = &sband->channels[local->scan_channel_idx];
3697
3698                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3699                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3700                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3701                         skip = 1;
3702
3703                 if (!skip) {
3704                         local->scan_channel = chan;
3705                         if (ieee80211_hw_config(local)) {
3706                                 printk(KERN_DEBUG "%s: failed to set freq to "
3707                                        "%d MHz for scan\n", dev->name,
3708                                        chan->center_freq);
3709                                 skip = 1;
3710                         }
3711                 }
3712
3713                 /* advance state machine to next channel/band */
3714                 local->scan_channel_idx++;
3715                 if (local->scan_channel_idx >= sband->n_channels) {
3716                         /*
3717                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3718                          * we'll catch that case above and complete the scan
3719                          * if that is the case.
3720                          */
3721                         local->scan_band++;
3722                         local->scan_channel_idx = 0;
3723                 }
3724
3725                 if (skip)
3726                         break;
3727
3728                 next_delay = IEEE80211_PROBE_DELAY +
3729                              usecs_to_jiffies(local->hw.channel_change_time);
3730                 local->scan_state = SCAN_SEND_PROBE;
3731                 break;
3732         case SCAN_SEND_PROBE:
3733                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3734                 local->scan_state = SCAN_SET_CHANNEL;
3735
3736                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3737                         break;
3738                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3739                                          local->scan_ssid_len);
3740                 next_delay = IEEE80211_CHANNEL_TIME;
3741                 break;
3742         }
3743
3744         if (local->sta_sw_scanning)
3745                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3746                                    next_delay);
3747 }
3748
3749
3750 static int ieee80211_sta_start_scan(struct net_device *dev,
3751                                     u8 *ssid, size_t ssid_len)
3752 {
3753         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3754         struct ieee80211_sub_if_data *sdata;
3755
3756         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3757                 return -EINVAL;
3758
3759         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3760          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3761          * BSSID: MACAddress
3762          * SSID
3763          * ScanType: ACTIVE, PASSIVE
3764          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3765          *    a Probe frame during active scanning
3766          * ChannelList
3767          * MinChannelTime (>= ProbeDelay), in TU
3768          * MaxChannelTime: (>= MinChannelTime), in TU
3769          */
3770
3771          /* MLME-SCAN.confirm
3772           * BSSDescriptionSet
3773           * ResultCode: SUCCESS, INVALID_PARAMETERS
3774          */
3775
3776         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3777                 if (local->scan_dev == dev)
3778                         return 0;
3779                 return -EBUSY;
3780         }
3781
3782         if (local->ops->hw_scan) {
3783                 int rc = local->ops->hw_scan(local_to_hw(local),
3784                                              ssid, ssid_len);
3785                 if (!rc) {
3786                         local->sta_hw_scanning = 1;
3787                         local->scan_dev = dev;
3788                 }
3789                 return rc;
3790         }
3791
3792         local->sta_sw_scanning = 1;
3793
3794         rcu_read_lock();
3795         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3796
3797                 /* Don't stop the master interface, otherwise we can't transmit
3798                  * probes! */
3799                 if (sdata->dev == local->mdev)
3800                         continue;
3801
3802                 netif_stop_queue(sdata->dev);
3803                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3804                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3805                         ieee80211_send_nullfunc(local, sdata, 1);
3806         }
3807         rcu_read_unlock();
3808
3809         if (ssid) {
3810                 local->scan_ssid_len = ssid_len;
3811                 memcpy(local->scan_ssid, ssid, ssid_len);
3812         } else
3813                 local->scan_ssid_len = 0;
3814         local->scan_state = SCAN_SET_CHANNEL;
3815         local->scan_channel_idx = 0;
3816         local->scan_band = IEEE80211_BAND_2GHZ;
3817         local->scan_dev = dev;
3818
3819         netif_tx_lock_bh(local->mdev);
3820         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3821         local->ops->configure_filter(local_to_hw(local),
3822                                      FIF_BCN_PRBRESP_PROMISC,
3823                                      &local->filter_flags,
3824                                      local->mdev->mc_count,
3825                                      local->mdev->mc_list);
3826         netif_tx_unlock_bh(local->mdev);
3827
3828         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3829         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3830                            IEEE80211_CHANNEL_TIME);
3831
3832         return 0;
3833 }
3834
3835
3836 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3837 {
3838         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3839         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3840         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3841
3842         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3843                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3844
3845         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3846                 if (local->scan_dev == dev)
3847                         return 0;
3848                 return -EBUSY;
3849         }
3850
3851         ifsta->scan_ssid_len = ssid_len;
3852         if (ssid_len)
3853                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3854         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3855         queue_work(local->hw.workqueue, &ifsta->work);
3856         return 0;
3857 }
3858
3859 static char *
3860 ieee80211_sta_scan_result(struct net_device *dev,
3861                           struct ieee80211_sta_bss *bss,
3862                           char *current_ev, char *end_buf)
3863 {
3864         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3865         struct iw_event iwe;
3866
3867         if (time_after(jiffies,
3868                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3869                 return current_ev;
3870
3871         memset(&iwe, 0, sizeof(iwe));
3872         iwe.cmd = SIOCGIWAP;
3873         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3874         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3875         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3876                                           IW_EV_ADDR_LEN);
3877
3878         memset(&iwe, 0, sizeof(iwe));
3879         iwe.cmd = SIOCGIWESSID;
3880         if (bss_mesh_cfg(bss)) {
3881                 iwe.u.data.length = bss_mesh_id_len(bss);
3882                 iwe.u.data.flags = 1;
3883                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3884                                                   bss_mesh_id(bss));
3885         } else {
3886                 iwe.u.data.length = bss->ssid_len;
3887                 iwe.u.data.flags = 1;
3888                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3889                                                   bss->ssid);
3890         }
3891
3892         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3893             || bss_mesh_cfg(bss)) {
3894                 memset(&iwe, 0, sizeof(iwe));
3895                 iwe.cmd = SIOCGIWMODE;
3896                 if (bss_mesh_cfg(bss))
3897                         iwe.u.mode = IW_MODE_MESH;
3898                 else if (bss->capability & WLAN_CAPABILITY_ESS)
3899                         iwe.u.mode = IW_MODE_MASTER;
3900                 else
3901                         iwe.u.mode = IW_MODE_ADHOC;
3902                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3903                                                   IW_EV_UINT_LEN);
3904         }
3905
3906         memset(&iwe, 0, sizeof(iwe));
3907         iwe.cmd = SIOCGIWFREQ;
3908         iwe.u.freq.m = bss->freq;
3909         iwe.u.freq.e = 6;
3910         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3911                                           IW_EV_FREQ_LEN);
3912
3913         memset(&iwe, 0, sizeof(iwe));
3914         iwe.cmd = SIOCGIWFREQ;
3915         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3916         iwe.u.freq.e = 0;
3917         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3918                                           IW_EV_FREQ_LEN);
3919
3920         memset(&iwe, 0, sizeof(iwe));
3921         iwe.cmd = IWEVQUAL;
3922         iwe.u.qual.qual = bss->signal;
3923         iwe.u.qual.level = bss->rssi;
3924         iwe.u.qual.noise = bss->noise;
3925         iwe.u.qual.updated = local->wstats_flags;
3926         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3927                                           IW_EV_QUAL_LEN);
3928
3929         memset(&iwe, 0, sizeof(iwe));
3930         iwe.cmd = SIOCGIWENCODE;
3931         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3932                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3933         else
3934                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3935         iwe.u.data.length = 0;
3936         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3937
3938         if (bss && bss->wpa_ie) {
3939                 memset(&iwe, 0, sizeof(iwe));
3940                 iwe.cmd = IWEVGENIE;
3941                 iwe.u.data.length = bss->wpa_ie_len;
3942                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3943                                                   bss->wpa_ie);
3944         }
3945
3946         if (bss && bss->rsn_ie) {
3947                 memset(&iwe, 0, sizeof(iwe));
3948                 iwe.cmd = IWEVGENIE;
3949                 iwe.u.data.length = bss->rsn_ie_len;
3950                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3951                                                   bss->rsn_ie);
3952         }
3953
3954         if (bss && bss->supp_rates_len > 0) {
3955                 /* display all supported rates in readable format */
3956                 char *p = current_ev + IW_EV_LCP_LEN;
3957                 int i;
3958
3959                 memset(&iwe, 0, sizeof(iwe));
3960                 iwe.cmd = SIOCGIWRATE;
3961                 /* Those two flags are ignored... */
3962                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3963
3964                 for (i = 0; i < bss->supp_rates_len; i++) {
3965                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3966                                                         0x7f) * 500000);
3967                         p = iwe_stream_add_value(current_ev, p,
3968                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3969                 }
3970                 current_ev = p;
3971         }
3972
3973         if (bss) {
3974                 char *buf;
3975                 buf = kmalloc(30, GFP_ATOMIC);
3976                 if (buf) {
3977                         memset(&iwe, 0, sizeof(iwe));
3978                         iwe.cmd = IWEVCUSTOM;
3979                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3980                         iwe.u.data.length = strlen(buf);
3981                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3982                                                           &iwe, buf);
3983                         kfree(buf);
3984                 }
3985         }
3986
3987         if (bss_mesh_cfg(bss)) {
3988                 char *buf;
3989                 u8 *cfg = bss_mesh_cfg(bss);
3990                 buf = kmalloc(50, GFP_ATOMIC);
3991                 if (buf) {
3992                         memset(&iwe, 0, sizeof(iwe));
3993                         iwe.cmd = IWEVCUSTOM;
3994                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
3995                         iwe.u.data.length = strlen(buf);
3996                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3997                                                           &iwe, buf);
3998                         sprintf(buf, "Path Selection Protocol ID: "
3999                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4000                                                         cfg[4]);
4001                         iwe.u.data.length = strlen(buf);
4002                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4003                                                           &iwe, buf);
4004                         sprintf(buf, "Path Selection Metric ID: "
4005                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4006                                                         cfg[8]);
4007                         iwe.u.data.length = strlen(buf);
4008                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4009                                                           &iwe, buf);
4010                         sprintf(buf, "Congestion Control Mode ID: "
4011                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4012                                                         cfg[11], cfg[12]);
4013                         iwe.u.data.length = strlen(buf);
4014                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4015                                                           &iwe, buf);
4016                         sprintf(buf, "Channel Precedence: "
4017                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4018                                                         cfg[15], cfg[16]);
4019                         iwe.u.data.length = strlen(buf);
4020                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4021                                                           &iwe, buf);
4022                         kfree(buf);
4023                 }
4024         }
4025
4026         return current_ev;
4027 }
4028
4029
4030 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4031 {
4032         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4033         char *current_ev = buf;
4034         char *end_buf = buf + len;
4035         struct ieee80211_sta_bss *bss;
4036
4037         spin_lock_bh(&local->sta_bss_lock);
4038         list_for_each_entry(bss, &local->sta_bss_list, list) {
4039                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4040                         spin_unlock_bh(&local->sta_bss_lock);
4041                         return -E2BIG;
4042                 }
4043                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4044                                                        end_buf);
4045         }
4046         spin_unlock_bh(&local->sta_bss_lock);
4047         return current_ev - buf;
4048 }
4049
4050
4051 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4052 {
4053         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4054         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4055         kfree(ifsta->extra_ie);
4056         if (len == 0) {
4057                 ifsta->extra_ie = NULL;
4058                 ifsta->extra_ie_len = 0;
4059                 return 0;
4060         }
4061         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4062         if (!ifsta->extra_ie) {
4063                 ifsta->extra_ie_len = 0;
4064                 return -ENOMEM;
4065         }
4066         memcpy(ifsta->extra_ie, ie, len);
4067         ifsta->extra_ie_len = len;
4068         return 0;
4069 }
4070
4071
4072 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4073                                          struct sk_buff *skb, u8 *bssid,
4074                                          u8 *addr)
4075 {
4076         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4077         struct sta_info *sta;
4078         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4079         DECLARE_MAC_BUF(mac);
4080
4081         /* TODO: Could consider removing the least recently used entry and
4082          * allow new one to be added. */
4083         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4084                 if (net_ratelimit()) {
4085                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4086                                "entry %s\n", dev->name, print_mac(mac, addr));
4087                 }
4088                 return NULL;
4089         }
4090
4091         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4092                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4093
4094         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4095         if (!sta)
4096                 return NULL;
4097
4098         sta->flags |= WLAN_STA_AUTHORIZED;
4099
4100         sta->supp_rates[local->hw.conf.channel->band] =
4101                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4102
4103         rate_control_rate_init(sta, local);
4104
4105         if (sta_info_insert(sta)) {
4106                 sta_info_destroy(sta);
4107                 return NULL;
4108         }
4109
4110         return sta;
4111 }
4112
4113
4114 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4115 {
4116         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4117         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4118
4119         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4120                dev->name, reason);
4121
4122         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4123             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4124                 return -EINVAL;
4125
4126         ieee80211_send_deauth(dev, ifsta, reason);
4127         ieee80211_set_disassoc(dev, ifsta, 1);
4128         return 0;
4129 }
4130
4131
4132 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4133 {
4134         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4135         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4136
4137         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4138                dev->name, reason);
4139
4140         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4141                 return -EINVAL;
4142
4143         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4144                 return -1;
4145
4146         ieee80211_send_disassoc(dev, ifsta, reason);
4147         ieee80211_set_disassoc(dev, ifsta, 0);
4148         return 0;
4149 }