SAFE public projects git trees. - safe/jmp/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 <net/iw_handler.h>
  28 #include <asm/types.h>
  29
  30 #include <net/mac80211.h>
  31 #include "ieee80211_i.h"
  32 #include "ieee80211_rate.h"
  33 #include "ieee80211_led.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  36 #define IEEE80211_AUTH_MAX_TRIES 3
  37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  38 #define IEEE80211_ASSOC_MAX_TRIES 3
  39 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  40 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  41 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  42 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  43 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  44 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  45
  46 #define IEEE80211_PROBE_DELAY (HZ / 33)
  47 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  48 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  49 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  50 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  51 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  52
  53 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  54
  55
  56 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  57
  58 #define ERP_INFO_USE_PROTECTION BIT(1)
  59
  60 /* mgmt header + 1 byte action code */
  61 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  62
  63 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  64 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  65 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  66 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  67 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  68
  69 /* next values represent the buffer size for A-MPDU frame.
  70  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  71 #define IEEE80211_MIN_AMPDU_BUF 0x8
  72 #define IEEE80211_MAX_AMPDU_BUF 0x40
  73
  74 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  75                                      u8 *ssid, size_t ssid_len);
  76 static struct ieee80211_sta_bss *
  77 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
  78                      u8 *ssid, u8 ssid_len);
  79 static void ieee80211_rx_bss_put(struct net_device *dev,
  80                                  struct ieee80211_sta_bss *bss);
  81 static int ieee80211_sta_find_ibss(struct net_device *dev,
  82                                    struct ieee80211_if_sta *ifsta);
  83 static int ieee80211_sta_wep_configured(struct net_device *dev);
  84 static int ieee80211_sta_start_scan(struct net_device *dev,
  85                                     u8 *ssid, size_t ssid_len);
  86 static int ieee80211_sta_config_auth(struct net_device *dev,
  87                                      struct ieee80211_if_sta *ifsta);
  88
  89
  90 /* Parsed Information Elements */
  91 struct ieee802_11_elems {
  92         /* pointers to IEs */
  93         u8 *ssid;
  94         u8 *supp_rates;
  95         u8 *fh_params;
  96         u8 *ds_params;
  97         u8 *cf_params;
  98         u8 *tim;
  99         u8 *ibss_params;
 100         u8 *challenge;
 101         u8 *wpa;
 102         u8 *rsn;
 103         u8 *erp_info;
 104         u8 *ext_supp_rates;
 105         u8 *wmm_info;
 106         u8 *wmm_param;
 107         u8 *ht_cap_elem;
 108         u8 *ht_info_elem;
 109         /* length of them, respectively */
 110         u8 ssid_len;
 111         u8 supp_rates_len;
 112         u8 fh_params_len;
 113         u8 ds_params_len;
 114         u8 cf_params_len;
 115         u8 tim_len;
 116         u8 ibss_params_len;
 117         u8 challenge_len;
 118         u8 wpa_len;
 119         u8 rsn_len;
 120         u8 erp_info_len;
 121         u8 ext_supp_rates_len;
 122         u8 wmm_info_len;
 123         u8 wmm_param_len;
 124         u8 ht_cap_elem_len;
 125         u8 ht_info_elem_len;
 126 };
 127
 128 static void ieee802_11_parse_elems(u8 *start, size_t len,
 129                                    struct ieee802_11_elems *elems)
 130 {
 131         size_t left = len;
 132         u8 *pos = start;
 133
 134         memset(elems, 0, sizeof(*elems));
 135
 136         while (left >= 2) {
 137                 u8 id, elen;
 138
 139                 id = *pos++;
 140                 elen = *pos++;
 141                 left -= 2;
 142
 143                 if (elen > left)
 144                         return;
 145
 146                 switch (id) {
 147                 case WLAN_EID_SSID:
 148                         elems->ssid = pos;
 149                         elems->ssid_len = elen;
 150                         break;
 151                 case WLAN_EID_SUPP_RATES:
 152                         elems->supp_rates = pos;
 153                         elems->supp_rates_len = elen;
 154                         break;
 155                 case WLAN_EID_FH_PARAMS:
 156                         elems->fh_params = pos;
 157                         elems->fh_params_len = elen;
 158                         break;
 159                 case WLAN_EID_DS_PARAMS:
 160                         elems->ds_params = pos;
 161                         elems->ds_params_len = elen;
 162                         break;
 163                 case WLAN_EID_CF_PARAMS:
 164                         elems->cf_params = pos;
 165                         elems->cf_params_len = elen;
 166                         break;
 167                 case WLAN_EID_TIM:
 168                         elems->tim = pos;
 169                         elems->tim_len = elen;
 170                         break;
 171                 case WLAN_EID_IBSS_PARAMS:
 172                         elems->ibss_params = pos;
 173                         elems->ibss_params_len = elen;
 174                         break;
 175                 case WLAN_EID_CHALLENGE:
 176                         elems->challenge = pos;
 177                         elems->challenge_len = elen;
 178                         break;
 179                 case WLAN_EID_WPA:
 180                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 181                             pos[2] == 0xf2) {
 182                                 /* Microsoft OUI (00:50:F2) */
 183                                 if (pos[3] == 1) {
 184                                         /* OUI Type 1 - WPA IE */
 185                                         elems->wpa = pos;
 186                                         elems->wpa_len = elen;
 187                                 } else if (elen >= 5 && pos[3] == 2) {
 188                                         if (pos[4] == 0) {
 189                                                 elems->wmm_info = pos;
 190                                                 elems->wmm_info_len = elen;
 191                                         } else if (pos[4] == 1) {
 192                                                 elems->wmm_param = pos;
 193                                                 elems->wmm_param_len = elen;
 194                                         }
 195                                 }
 196                         }
 197                         break;
 198                 case WLAN_EID_RSN:
 199                         elems->rsn = pos;
 200                         elems->rsn_len = elen;
 201                         break;
 202                 case WLAN_EID_ERP_INFO:
 203                         elems->erp_info = pos;
 204                         elems->erp_info_len = elen;
 205                         break;
 206                 case WLAN_EID_EXT_SUPP_RATES:
 207                         elems->ext_supp_rates = pos;
 208                         elems->ext_supp_rates_len = elen;
 209                         break;
 210                 case WLAN_EID_HT_CAPABILITY:
 211                         elems->ht_cap_elem = pos;
 212                         elems->ht_cap_elem_len = elen;
 213                         break;
 214                 case WLAN_EID_HT_EXTRA_INFO:
 215                         elems->ht_info_elem = pos;
 216                         elems->ht_info_elem_len = elen;
 217                         break;
 218                 default:
 219                         break;
 220                 }
 221
 222                 left -= elen;
 223                 pos += elen;
 224         }
 225 }
 226
 227
 228 static int ecw2cw(int ecw)
 229 {
 230         int cw = 1;
 231         while (ecw > 0) {
 232                 cw <<= 1;
 233                 ecw--;
 234         }
 235         return cw - 1;
 236 }
 237
 238 static void ieee80211_sta_wmm_params(struct net_device *dev,
 239                                      struct ieee80211_if_sta *ifsta,
 240                                      u8 *wmm_param, size_t wmm_param_len)
 241 {
 242         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 243         struct ieee80211_tx_queue_params params;
 244         size_t left;
 245         int count;
 246         u8 *pos;
 247
 248         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 249                 return;
 250         count = wmm_param[6] & 0x0f;
 251         if (count == ifsta->wmm_last_param_set)
 252                 return;
 253         ifsta->wmm_last_param_set = count;
 254
 255         pos = wmm_param + 8;
 256         left = wmm_param_len - 8;
 257
 258         memset(&params, 0, sizeof(params));
 259
 260         if (!local->ops->conf_tx)
 261                 return;
 262
 263         local->wmm_acm = 0;
 264         for (; left >= 4; left -= 4, pos += 4) {
 265                 int aci = (pos[0] >> 5) & 0x03;
 266                 int acm = (pos[0] >> 4) & 0x01;
 267                 int queue;
 268
 269                 switch (aci) {
 270                 case 1:
 271                         queue = IEEE80211_TX_QUEUE_DATA3;
 272                         if (acm) {
 273                                 local->wmm_acm |= BIT(0) | BIT(3);
 274                         }
 275                         break;
 276                 case 2:
 277                         queue = IEEE80211_TX_QUEUE_DATA1;
 278                         if (acm) {
 279                                 local->wmm_acm |= BIT(4) | BIT(5);
 280                         }
 281                         break;
 282                 case 3:
 283                         queue = IEEE80211_TX_QUEUE_DATA0;
 284                         if (acm) {
 285                                 local->wmm_acm |= BIT(6) | BIT(7);
 286                         }
 287                         break;
 288                 case 0:
 289                 default:
 290                         queue = IEEE80211_TX_QUEUE_DATA2;
 291                         if (acm) {
 292                                 local->wmm_acm |= BIT(1) | BIT(2);
 293                         }
 294                         break;
 295                 }
 296
 297                 params.aifs = pos[0] & 0x0f;
 298                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 299                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 300                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 301                 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 302                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 303                        "cWmin=%d cWmax=%d burst=%d\n",
 304                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 305                        params.cw_max, params.burst_time);
 306                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 307                  * AC for now) */
 308                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 309                         printk(KERN_DEBUG "%s: failed to set TX queue "
 310                                "parameters for queue %d\n", dev->name, queue);
 311                 }
 312         }
 313 }
 314
 315
 316 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 317                                    u8 erp_value)
 318 {
 319         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 320         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 321         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 322         bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 323         DECLARE_MAC_BUF(mac);
 324         u32 changed = 0;
 325
 326         if (use_protection != bss_conf->use_cts_prot) {
 327                 if (net_ratelimit()) {
 328                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 329                                "%s)\n",
 330                                sdata->dev->name,
 331                                use_protection ? "enabled" : "disabled",
 332                                print_mac(mac, ifsta->bssid));
 333                 }
 334                 bss_conf->use_cts_prot = use_protection;
 335                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 336         }
 337
 338         if (preamble_mode != bss_conf->use_short_preamble) {
 339                 if (net_ratelimit()) {
 340                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 341                                " (BSSID=%s)\n",
 342                                sdata->dev->name,
 343                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 344                                         "short" : "long",
 345                                print_mac(mac, ifsta->bssid));
 346                 }
 347                 bss_conf->use_short_preamble = preamble_mode;
 348                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 349         }
 350
 351         return changed;
 352 }
 353
 354 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 355                                    struct ieee80211_ht_info *ht_info)
 356 {
 357
 358         if (ht_info == NULL)
 359                 return -EINVAL;
 360
 361         memset(ht_info, 0, sizeof(*ht_info));
 362
 363         if (ht_cap_ie) {
 364                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 365
 366                 ht_info->ht_supported = 1;
 367                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 368                 ht_info->ampdu_factor =
 369                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 370                 ht_info->ampdu_density =
 371                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 372                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 373         } else
 374                 ht_info->ht_supported = 0;
 375
 376         return 0;
 377 }
 378
 379 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 380                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 381                         struct ieee80211_ht_bss_info *bss_info)
 382 {
 383         if (bss_info == NULL)
 384                 return -EINVAL;
 385
 386         memset(bss_info, 0, sizeof(*bss_info));
 387
 388         if (ht_add_info_ie) {
 389                 u16 op_mode;
 390                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 391
 392                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 393                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 394                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 395         }
 396
 397         return 0;
 398 }
 399
 400 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 401                                          struct ieee80211_if_sta *ifsta)
 402 {
 403         char *buf;
 404         size_t len;
 405         int i;
 406         union iwreq_data wrqu;
 407
 408         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 409                 return;
 410
 411         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 412                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 413         if (!buf)
 414                 return;
 415
 416         len = sprintf(buf, "ASSOCINFO(");
 417         if (ifsta->assocreq_ies) {
 418                 len += sprintf(buf + len, "ReqIEs=");
 419                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 420                         len += sprintf(buf + len, "%02x",
 421                                        ifsta->assocreq_ies[i]);
 422                 }
 423         }
 424         if (ifsta->assocresp_ies) {
 425                 if (ifsta->assocreq_ies)
 426                         len += sprintf(buf + len, " ");
 427                 len += sprintf(buf + len, "RespIEs=");
 428                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 429                         len += sprintf(buf + len, "%02x",
 430                                        ifsta->assocresp_ies[i]);
 431                 }
 432         }
 433         len += sprintf(buf + len, ")");
 434
 435         if (len > IW_CUSTOM_MAX) {
 436                 len = sprintf(buf, "ASSOCRESPIE=");
 437                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 438                         len += sprintf(buf + len, "%02x",
 439                                        ifsta->assocresp_ies[i]);
 440                 }
 441         }
 442
 443         memset(&wrqu, 0, sizeof(wrqu));
 444         wrqu.data.length = len;
 445         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 446
 447         kfree(buf);
 448 }
 449
 450
 451 static void ieee80211_set_associated(struct net_device *dev,
 452                                      struct ieee80211_if_sta *ifsta,
 453                                      bool assoc)
 454 {
 455         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 456         struct ieee80211_local *local = sdata->local;
 457         union iwreq_data wrqu;
 458         u32 changed = BSS_CHANGED_ASSOC;
 459
 460         if (assoc) {
 461                 struct ieee80211_sta_bss *bss;
 462
 463                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 464
 465                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 466                         return;
 467
 468                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 469                                            local->hw.conf.channel,
 470                                            ifsta->ssid, ifsta->ssid_len);
 471                 if (bss) {
 472                         if (bss->has_erp_value)
 473                                 changed |= ieee80211_handle_erp_ie(
 474                                                 sdata, bss->erp_value);
 475                         ieee80211_rx_bss_put(dev, bss);
 476                 }
 477
 478                 netif_carrier_on(dev);
 479                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 480                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 481                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 482                 ieee80211_sta_send_associnfo(dev, ifsta);
 483         } else {
 484                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 485
 486                 netif_carrier_off(dev);
 487                 ieee80211_reset_erp_info(dev);
 488                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 489         }
 490         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 491         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 492         ifsta->last_probe = jiffies;
 493         ieee80211_led_assoc(local, assoc);
 494
 495         sdata->bss_conf.assoc = assoc;
 496         ieee80211_bss_info_change_notify(sdata, changed);
 497 }
 498
 499 static void ieee80211_set_disassoc(struct net_device *dev,
 500                                    struct ieee80211_if_sta *ifsta, int deauth)
 501 {
 502         if (deauth)
 503                 ifsta->auth_tries = 0;
 504         ifsta->assoc_tries = 0;
 505         ieee80211_set_associated(dev, ifsta, 0);
 506 }
 507
 508 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 509                              int encrypt)
 510 {
 511         struct ieee80211_sub_if_data *sdata;
 512         struct ieee80211_tx_packet_data *pkt_data;
 513
 514         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 515         skb->dev = sdata->local->mdev;
 516         skb_set_mac_header(skb, 0);
 517         skb_set_network_header(skb, 0);
 518         skb_set_transport_header(skb, 0);
 519
 520         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 521         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 522         pkt_data->ifindex = sdata->dev->ifindex;
 523         if (!encrypt)
 524                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 525
 526         dev_queue_xmit(skb);
 527 }
 528
 529
 530 static void ieee80211_send_auth(struct net_device *dev,
 531                                 struct ieee80211_if_sta *ifsta,
 532                                 int transaction, u8 *extra, size_t extra_len,
 533                                 int encrypt)
 534 {
 535         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 536         struct sk_buff *skb;
 537         struct ieee80211_mgmt *mgmt;
 538
 539         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 540                             sizeof(*mgmt) + 6 + extra_len);
 541         if (!skb) {
 542                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 543                        "frame\n", dev->name);
 544                 return;
 545         }
 546         skb_reserve(skb, local->hw.extra_tx_headroom);
 547
 548         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 549         memset(mgmt, 0, 24 + 6);
 550         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 551                                            IEEE80211_STYPE_AUTH);
 552         if (encrypt)
 553                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 554         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 555         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 556         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 557         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 558         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 559         ifsta->auth_transaction = transaction + 1;
 560         mgmt->u.auth.status_code = cpu_to_le16(0);
 561         if (extra)
 562                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 563
 564         ieee80211_sta_tx(dev, skb, encrypt);
 565 }
 566
 567
 568 static void ieee80211_authenticate(struct net_device *dev,
 569                                    struct ieee80211_if_sta *ifsta)
 570 {
 571         DECLARE_MAC_BUF(mac);
 572
 573         ifsta->auth_tries++;
 574         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 575                 printk(KERN_DEBUG "%s: authentication with AP %s"
 576                        " timed out\n",
 577                        dev->name, print_mac(mac, ifsta->bssid));
 578                 ifsta->state = IEEE80211_DISABLED;
 579                 return;
 580         }
 581
 582         ifsta->state = IEEE80211_AUTHENTICATE;
 583         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 584                dev->name, print_mac(mac, ifsta->bssid));
 585
 586         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 587
 588         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 589 }
 590
 591
 592 static void ieee80211_send_assoc(struct net_device *dev,
 593                                  struct ieee80211_if_sta *ifsta)
 594 {
 595         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 596         struct ieee80211_hw_mode *mode;
 597         struct sk_buff *skb;
 598         struct ieee80211_mgmt *mgmt;
 599         u8 *pos, *ies;
 600         int i, len;
 601         u16 capab;
 602         struct ieee80211_sta_bss *bss;
 603         int wmm = 0;
 604
 605         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 606                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 607                             ifsta->ssid_len);
 608         if (!skb) {
 609                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 610                        "frame\n", dev->name);
 611                 return;
 612         }
 613         skb_reserve(skb, local->hw.extra_tx_headroom);
 614
 615         mode = local->oper_hw_mode;
 616         capab = ifsta->capab;
 617         if (mode->mode == MODE_IEEE80211G) {
 618                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 619                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 620         }
 621         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 622                                    ifsta->ssid, ifsta->ssid_len);
 623         if (bss) {
 624                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 625                         capab |= WLAN_CAPABILITY_PRIVACY;
 626                 if (bss->wmm_ie) {
 627                         wmm = 1;
 628                 }
 629                 ieee80211_rx_bss_put(dev, bss);
 630         }
 631
 632         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 633         memset(mgmt, 0, 24);
 634         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 635         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 636         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 637
 638         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 639                 skb_put(skb, 10);
 640                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 641                                                    IEEE80211_STYPE_REASSOC_REQ);
 642                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 643                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 644                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 645                        ETH_ALEN);
 646         } else {
 647                 skb_put(skb, 4);
 648                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 649                                                    IEEE80211_STYPE_ASSOC_REQ);
 650                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 651                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 652         }
 653
 654         /* SSID */
 655         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 656         *pos++ = WLAN_EID_SSID;
 657         *pos++ = ifsta->ssid_len;
 658         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 659
 660         len = mode->num_rates;
 661         if (len > 8)
 662                 len = 8;
 663         pos = skb_put(skb, len + 2);
 664         *pos++ = WLAN_EID_SUPP_RATES;
 665         *pos++ = len;
 666         for (i = 0; i < len; i++) {
 667                 int rate = mode->rates[i].rate;
 668                 *pos++ = (u8) (rate / 5);
 669         }
 670
 671         if (mode->num_rates > len) {
 672                 pos = skb_put(skb, mode->num_rates - len + 2);
 673                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 674                 *pos++ = mode->num_rates - len;
 675                 for (i = len; i < mode->num_rates; i++) {
 676                         int rate = mode->rates[i].rate;
 677                         *pos++ = (u8) (rate / 5);
 678                 }
 679         }
 680
 681         if (ifsta->extra_ie) {
 682                 pos = skb_put(skb, ifsta->extra_ie_len);
 683                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 684         }
 685
 686         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 687                 pos = skb_put(skb, 9);
 688                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 689                 *pos++ = 7; /* len */
 690                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 691                 *pos++ = 0x50;
 692                 *pos++ = 0xf2;
 693                 *pos++ = 2; /* WME */
 694                 *pos++ = 0; /* WME info */
 695                 *pos++ = 1; /* WME ver */
 696                 *pos++ = 0;
 697         }
 698         /* wmm support is a must to HT */
 699         if (wmm && mode->ht_info.ht_supported) {
 700                 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
 701                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 702                 *pos++ = WLAN_EID_HT_CAPABILITY;
 703                 *pos++ = sizeof(struct ieee80211_ht_cap);
 704                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 705                 memcpy(pos, &tmp, sizeof(u16));
 706                 pos += sizeof(u16);
 707                 *pos++ = (mode->ht_info.ampdu_factor |
 708                                 (mode->ht_info.ampdu_density << 2));
 709                 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
 710         }
 711
 712         kfree(ifsta->assocreq_ies);
 713         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 714         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 715         if (ifsta->assocreq_ies)
 716                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 717
 718         ieee80211_sta_tx(dev, skb, 0);
 719 }
 720
 721
 722 static void ieee80211_send_deauth(struct net_device *dev,
 723                                   struct ieee80211_if_sta *ifsta, u16 reason)
 724 {
 725         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 726         struct sk_buff *skb;
 727         struct ieee80211_mgmt *mgmt;
 728
 729         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 730         if (!skb) {
 731                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 732                        "frame\n", dev->name);
 733                 return;
 734         }
 735         skb_reserve(skb, local->hw.extra_tx_headroom);
 736
 737         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 738         memset(mgmt, 0, 24);
 739         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 740         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 741         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 742         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 743                                            IEEE80211_STYPE_DEAUTH);
 744         skb_put(skb, 2);
 745         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 746
 747         ieee80211_sta_tx(dev, skb, 0);
 748 }
 749
 750
 751 static void ieee80211_send_disassoc(struct net_device *dev,
 752                                     struct ieee80211_if_sta *ifsta, u16 reason)
 753 {
 754         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 755         struct sk_buff *skb;
 756         struct ieee80211_mgmt *mgmt;
 757
 758         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 759         if (!skb) {
 760                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 761                        "frame\n", dev->name);
 762                 return;
 763         }
 764         skb_reserve(skb, local->hw.extra_tx_headroom);
 765
 766         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 767         memset(mgmt, 0, 24);
 768         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 769         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 770         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 771         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 772                                            IEEE80211_STYPE_DISASSOC);
 773         skb_put(skb, 2);
 774         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 775
 776         ieee80211_sta_tx(dev, skb, 0);
 777 }
 778
 779
 780 static int ieee80211_privacy_mismatch(struct net_device *dev,
 781                                       struct ieee80211_if_sta *ifsta)
 782 {
 783         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 784         struct ieee80211_sta_bss *bss;
 785         int bss_privacy;
 786         int wep_privacy;
 787         int privacy_invoked;
 788
 789         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 790                 return 0;
 791
 792         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 793                                    ifsta->ssid, ifsta->ssid_len);
 794         if (!bss)
 795                 return 0;
 796
 797         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 798         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 799         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 800
 801         ieee80211_rx_bss_put(dev, bss);
 802
 803         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 804                 return 0;
 805
 806         return 1;
 807 }
 808
 809
 810 static void ieee80211_associate(struct net_device *dev,
 811                                 struct ieee80211_if_sta *ifsta)
 812 {
 813         DECLARE_MAC_BUF(mac);
 814
 815         ifsta->assoc_tries++;
 816         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 817                 printk(KERN_DEBUG "%s: association with AP %s"
 818                        " timed out\n",
 819                        dev->name, print_mac(mac, ifsta->bssid));
 820                 ifsta->state = IEEE80211_DISABLED;
 821                 return;
 822         }
 823
 824         ifsta->state = IEEE80211_ASSOCIATE;
 825         printk(KERN_DEBUG "%s: associate with AP %s\n",
 826                dev->name, print_mac(mac, ifsta->bssid));
 827         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 828                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 829                        "mixed-cell disabled - abort association\n", dev->name);
 830                 ifsta->state = IEEE80211_DISABLED;
 831                 return;
 832         }
 833
 834         ieee80211_send_assoc(dev, ifsta);
 835
 836         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 837 }
 838
 839
 840 static void ieee80211_associated(struct net_device *dev,
 841                                  struct ieee80211_if_sta *ifsta)
 842 {
 843         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 844         struct sta_info *sta;
 845         int disassoc;
 846         DECLARE_MAC_BUF(mac);
 847
 848         /* TODO: start monitoring current AP signal quality and number of
 849          * missed beacons. Scan other channels every now and then and search
 850          * for better APs. */
 851         /* TODO: remove expired BSSes */
 852
 853         ifsta->state = IEEE80211_ASSOCIATED;
 854
 855         sta = sta_info_get(local, ifsta->bssid);
 856         if (!sta) {
 857                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 858                        dev->name, print_mac(mac, ifsta->bssid));
 859                 disassoc = 1;
 860         } else {
 861                 disassoc = 0;
 862                 if (time_after(jiffies,
 863                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 864                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 865                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 866                                        "current AP %s - assume out of "
 867                                        "range\n",
 868                                        dev->name, print_mac(mac, ifsta->bssid));
 869                                 disassoc = 1;
 870                                 sta_info_free(sta);
 871                         } else
 872                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 873                                                          local->scan_ssid,
 874                                                          local->scan_ssid_len);
 875                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 876                 } else {
 877                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 878                         if (time_after(jiffies, ifsta->last_probe +
 879                                        IEEE80211_PROBE_INTERVAL)) {
 880                                 ifsta->last_probe = jiffies;
 881                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 882                                                          ifsta->ssid,
 883                                                          ifsta->ssid_len);
 884                         }
 885                 }
 886                 sta_info_put(sta);
 887         }
 888         if (disassoc) {
 889                 ifsta->state = IEEE80211_DISABLED;
 890                 ieee80211_set_associated(dev, ifsta, 0);
 891         } else {
 892                 mod_timer(&ifsta->timer, jiffies +
 893                                       IEEE80211_MONITORING_INTERVAL);
 894         }
 895 }
 896
 897
 898 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 899                                      u8 *ssid, size_t ssid_len)
 900 {
 901         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 902         struct ieee80211_hw_mode *mode;
 903         struct sk_buff *skb;
 904         struct ieee80211_mgmt *mgmt;
 905         u8 *pos, *supp_rates, *esupp_rates = NULL;
 906         int i;
 907
 908         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 909         if (!skb) {
 910                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 911                        "request\n", dev->name);
 912                 return;
 913         }
 914         skb_reserve(skb, local->hw.extra_tx_headroom);
 915
 916         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 917         memset(mgmt, 0, 24);
 918         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 919                                            IEEE80211_STYPE_PROBE_REQ);
 920         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 921         if (dst) {
 922                 memcpy(mgmt->da, dst, ETH_ALEN);
 923                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 924         } else {
 925                 memset(mgmt->da, 0xff, ETH_ALEN);
 926                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 927         }
 928         pos = skb_put(skb, 2 + ssid_len);
 929         *pos++ = WLAN_EID_SSID;
 930         *pos++ = ssid_len;
 931         memcpy(pos, ssid, ssid_len);
 932
 933         supp_rates = skb_put(skb, 2);
 934         supp_rates[0] = WLAN_EID_SUPP_RATES;
 935         supp_rates[1] = 0;
 936         mode = local->oper_hw_mode;
 937         for (i = 0; i < mode->num_rates; i++) {
 938                 struct ieee80211_rate *rate = &mode->rates[i];
 939                 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
 940                         continue;
 941                 if (esupp_rates) {
 942                         pos = skb_put(skb, 1);
 943                         esupp_rates[1]++;
 944                 } else if (supp_rates[1] == 8) {
 945                         esupp_rates = skb_put(skb, 3);
 946                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 947                         esupp_rates[1] = 1;
 948                         pos = &esupp_rates[2];
 949                 } else {
 950                         pos = skb_put(skb, 1);
 951                         supp_rates[1]++;
 952                 }
 953                 *pos = rate->rate / 5;
 954         }
 955
 956         ieee80211_sta_tx(dev, skb, 0);
 957 }
 958
 959
 960 static int ieee80211_sta_wep_configured(struct net_device *dev)
 961 {
 962         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 963         if (!sdata || !sdata->default_key ||
 964             sdata->default_key->conf.alg != ALG_WEP)
 965                 return 0;
 966         return 1;
 967 }
 968
 969
 970 static void ieee80211_auth_completed(struct net_device *dev,
 971                                      struct ieee80211_if_sta *ifsta)
 972 {
 973         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 974         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 975         ieee80211_associate(dev, ifsta);
 976 }
 977
 978
 979 static void ieee80211_auth_challenge(struct net_device *dev,
 980                                      struct ieee80211_if_sta *ifsta,
 981                                      struct ieee80211_mgmt *mgmt,
 982                                      size_t len)
 983 {
 984         u8 *pos;
 985         struct ieee802_11_elems elems;
 986
 987         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 988         pos = mgmt->u.auth.variable;
 989         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 990         if (!elems.challenge) {
 991                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 992                        "frame\n", dev->name);
 993                 return;
 994         }
 995         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 996                             elems.challenge_len + 2, 1);
 997 }
 998
 999 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1000                                         u8 dialog_token, u16 status, u16 policy,
1001                                         u16 buf_size, u16 timeout)
1002 {
1003         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1005         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1006         struct sk_buff *skb;
1007         struct ieee80211_mgmt *mgmt;
1008         u16 capab;
1009
1010         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1011                                         sizeof(mgmt->u.action.u.addba_resp));
1012         if (!skb) {
1013                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1014                        "for addba resp frame\n", dev->name);
1015                 return;
1016         }
1017
1018         skb_reserve(skb, local->hw.extra_tx_headroom);
1019         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1020         memset(mgmt, 0, 24);
1021         memcpy(mgmt->da, da, ETH_ALEN);
1022         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1023         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1024                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1025         else
1026                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1027         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1028                                            IEEE80211_STYPE_ACTION);
1029
1030         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1031         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1032         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1033         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1034
1035         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1036         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1037         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1038
1039         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1040         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1041         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1042
1043         ieee80211_sta_tx(dev, skb, 0);
1044
1045         return;
1046 }
1047
1048 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1049                                                 struct ieee80211_mgmt *mgmt,
1050                                                 size_t len)
1051 {
1052         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1053         struct ieee80211_hw *hw = &local->hw;
1054         struct ieee80211_conf *conf = &hw->conf;
1055         struct sta_info *sta;
1056         struct tid_ampdu_rx *tid_agg_rx;
1057         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1058         u8 dialog_token;
1059         int ret = -EOPNOTSUPP;
1060         DECLARE_MAC_BUF(mac);
1061
1062         sta = sta_info_get(local, mgmt->sa);
1063         if (!sta)
1064                 return;
1065
1066         /* extract session parameters from addba request frame */
1067         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1068         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1069         start_seq_num =
1070                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1071
1072         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1073         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1074         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1075         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1076
1077         status = WLAN_STATUS_REQUEST_DECLINED;
1078
1079         /* sanity check for incoming parameters:
1080          * check if configuration can support the BA policy
1081          * and if buffer size does not exceeds max value */
1082         if (((ba_policy != 1)
1083                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1084                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1085                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1086 #ifdef CONFIG_MAC80211_HT_DEBUG
1087                 if (net_ratelimit())
1088                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1089                                 "%s on tid %u. policy %d, buffer size %d\n",
1090                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1091                                 buf_size);
1092 #endif /* CONFIG_MAC80211_HT_DEBUG */
1093                 goto end_no_lock;
1094         }
1095         /* determine default buffer size */
1096         if (buf_size == 0) {
1097                 struct ieee80211_hw_mode *mode = conf->mode;
1098                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1099                 buf_size = buf_size << mode->ht_info.ampdu_factor;
1100         }
1101
1102         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1103
1104         /* examine state machine */
1105         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1106
1107         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1108 #ifdef CONFIG_MAC80211_HT_DEBUG
1109                 if (net_ratelimit())
1110                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1111                                 "%s on tid %u\n",
1112                                 print_mac(mac, mgmt->sa), tid);
1113 #endif /* CONFIG_MAC80211_HT_DEBUG */
1114                 goto end;
1115         }
1116
1117         /* prepare reordering buffer */
1118         tid_agg_rx->reorder_buf =
1119                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1120         if (!tid_agg_rx->reorder_buf) {
1121                 if (net_ratelimit())
1122                         printk(KERN_ERR "can not allocate reordering buffer "
1123                                "to tid %d\n", tid);
1124                 goto end;
1125         }
1126         memset(tid_agg_rx->reorder_buf, 0,
1127                 buf_size * sizeof(struct sk_buf *));
1128
1129         if (local->ops->ampdu_action)
1130                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1131                                                sta->addr, tid, &start_seq_num);
1132 #ifdef CONFIG_MAC80211_HT_DEBUG
1133         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1134 #endif /* CONFIG_MAC80211_HT_DEBUG */
1135
1136         if (ret) {
1137                 kfree(tid_agg_rx->reorder_buf);
1138                 goto end;
1139         }
1140
1141         /* change state and send addba resp */
1142         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1143         tid_agg_rx->dialog_token = dialog_token;
1144         tid_agg_rx->ssn = start_seq_num;
1145         tid_agg_rx->head_seq_num = start_seq_num;
1146         tid_agg_rx->buf_size = buf_size;
1147         tid_agg_rx->timeout = timeout;
1148         tid_agg_rx->stored_mpdu_num = 0;
1149         status = WLAN_STATUS_SUCCESS;
1150 end:
1151         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1152
1153 end_no_lock:
1154         ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1155                                 status, 1, buf_size, timeout);
1156         sta_info_put(sta);
1157 }
1158
1159 static void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1160                                  u16 initiator, u16 reason_code)
1161 {
1162         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1163         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1164         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1165         struct sk_buff *skb;
1166         struct ieee80211_mgmt *mgmt;
1167         u16 params;
1168
1169         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1170                                         sizeof(mgmt->u.action.u.delba));
1171
1172         if (!skb) {
1173                 printk(KERN_ERR "%s: failed to allocate buffer "
1174                                         "for delba frame\n", dev->name);
1175                 return;
1176         }
1177
1178         skb_reserve(skb, local->hw.extra_tx_headroom);
1179         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1180         memset(mgmt, 0, 24);
1181         memcpy(mgmt->da, da, ETH_ALEN);
1182         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1183         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1184                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1185         else
1186                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1187         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1188                                         IEEE80211_STYPE_ACTION);
1189
1190         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1191
1192         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1193         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1194         params = (u16)(initiator << 11);        /* bit 11 initiator */
1195         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1196
1197         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1198         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1199
1200         ieee80211_sta_tx(dev, skb, 0);
1201 }
1202
1203 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1204                                         u16 initiator, u16 reason)
1205 {
1206         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1207         struct ieee80211_hw *hw = &local->hw;
1208         struct sta_info *sta;
1209         int ret, i;
1210
1211         sta = sta_info_get(local, ra);
1212         if (!sta)
1213                 return;
1214
1215         /* check if TID is in operational state */
1216         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1217         if (sta->ampdu_mlme.tid_rx[tid].state
1218                                 != HT_AGG_STATE_OPERATIONAL) {
1219                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1220                 sta_info_put(sta);
1221                 return;
1222         }
1223         sta->ampdu_mlme.tid_rx[tid].state =
1224                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1225                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1226                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1227
1228         /* stop HW Rx aggregation. ampdu_action existence
1229          * already verified in session init so we add the BUG_ON */
1230         BUG_ON(!local->ops->ampdu_action);
1231
1232         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1233                                         ra, tid, NULL);
1234         if (ret)
1235                 printk(KERN_DEBUG "HW problem - can not stop rx "
1236                                 "aggergation for tid %d\n", tid);
1237
1238         /* shutdown timer has not expired */
1239         if (initiator != WLAN_BACK_TIMER)
1240                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1241                                         session_timer);
1242
1243         /* check if this is a self generated aggregation halt */
1244         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1245                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1246
1247         /* free the reordering buffer */
1248         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1249                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1250                         /* release the reordered frames */
1251                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1252                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1253                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1254                 }
1255         }
1256         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1257
1258         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1259         sta_info_put(sta);
1260 }
1261
1262 static void ieee80211_sta_process_delba(struct net_device *dev,
1263                         struct ieee80211_mgmt *mgmt, size_t len)
1264 {
1265         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1266         struct sta_info *sta;
1267         u16 tid, params;
1268         u16 initiator;
1269         DECLARE_MAC_BUF(mac);
1270
1271         sta = sta_info_get(local, mgmt->sa);
1272         if (!sta)
1273                 return;
1274
1275         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1276         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1277         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1278
1279 #ifdef CONFIG_MAC80211_HT_DEBUG
1280         if (net_ratelimit())
1281                 printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n",
1282                         print_mac(mac, mgmt->sa), tid,
1283                         mgmt->u.action.u.delba.reason_code);
1284 #endif /* CONFIG_MAC80211_HT_DEBUG */
1285
1286         if (initiator == WLAN_BACK_INITIATOR)
1287                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1288                                                  WLAN_BACK_INITIATOR, 0);
1289         sta_info_put(sta);
1290 }
1291
1292 /*
1293  * After receiving Block Ack Request (BAR) we activated a
1294  * timer after each frame arrives from the originator.
1295  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1296  */
1297 void sta_rx_agg_session_timer_expired(unsigned long data)
1298 {
1299         /* not an elegant detour, but there is no choice as the timer passes
1300          * only one argument, and verious sta_info are needed here, so init
1301          * flow in sta_info_add gives the TID as data, while the timer_to_id
1302          * array gives the sta through container_of */
1303         u8 *ptid = (u8 *)data;
1304         u8 *timer_to_id = ptid - *ptid;
1305         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1306                                          timer_to_tid[0]);
1307
1308         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1309         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1310                                          WLAN_BACK_TIMER,
1311                                          WLAN_REASON_QSTA_TIMEOUT);
1312 }
1313
1314
1315 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1316                                    struct ieee80211_if_sta *ifsta,
1317                                    struct ieee80211_mgmt *mgmt,
1318                                    size_t len)
1319 {
1320         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1321         u16 auth_alg, auth_transaction, status_code;
1322         DECLARE_MAC_BUF(mac);
1323
1324         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1325             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1326                 printk(KERN_DEBUG "%s: authentication frame received from "
1327                        "%s, but not in authenticate state - ignored\n",
1328                        dev->name, print_mac(mac, mgmt->sa));
1329                 return;
1330         }
1331
1332         if (len < 24 + 6) {
1333                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1334                        "received from %s - ignored\n",
1335                        dev->name, len, print_mac(mac, mgmt->sa));
1336                 return;
1337         }
1338
1339         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1340             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1341                 printk(KERN_DEBUG "%s: authentication frame received from "
1342                        "unknown AP (SA=%s BSSID=%s) - "
1343                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1344                        print_mac(mac, mgmt->bssid));
1345                 return;
1346         }
1347
1348         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1349             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1350                 printk(KERN_DEBUG "%s: authentication frame received from "
1351                        "unknown BSSID (SA=%s BSSID=%s) - "
1352                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1353                        print_mac(mac, mgmt->bssid));
1354                 return;
1355         }
1356
1357         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1358         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1359         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1360
1361         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1362                "transaction=%d status=%d)\n",
1363                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1364                auth_transaction, status_code);
1365
1366         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1367                 /* IEEE 802.11 standard does not require authentication in IBSS
1368                  * networks and most implementations do not seem to use it.
1369                  * However, try to reply to authentication attempts if someone
1370                  * has actually implemented this.
1371                  * TODO: Could implement shared key authentication. */
1372                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1373                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1374                                "frame (alg=%d transaction=%d)\n",
1375                                dev->name, auth_alg, auth_transaction);
1376                         return;
1377                 }
1378                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1379         }
1380
1381         if (auth_alg != ifsta->auth_alg ||
1382             auth_transaction != ifsta->auth_transaction) {
1383                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1384                        "(alg=%d transaction=%d)\n",
1385                        dev->name, auth_alg, auth_transaction);
1386                 return;
1387         }
1388
1389         if (status_code != WLAN_STATUS_SUCCESS) {
1390                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1391                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1392                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1393                         u8 algs[3];
1394                         const int num_algs = ARRAY_SIZE(algs);
1395                         int i, pos;
1396                         algs[0] = algs[1] = algs[2] = 0xff;
1397                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1398                                 algs[0] = WLAN_AUTH_OPEN;
1399                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1400                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1401                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1402                                 algs[2] = WLAN_AUTH_LEAP;
1403                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1404                                 pos = 0;
1405                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1406                                 pos = 1;
1407                         else
1408                                 pos = 2;
1409                         for (i = 0; i < num_algs; i++) {
1410                                 pos++;
1411                                 if (pos >= num_algs)
1412                                         pos = 0;
1413                                 if (algs[pos] == ifsta->auth_alg ||
1414                                     algs[pos] == 0xff)
1415                                         continue;
1416                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1417                                     !ieee80211_sta_wep_configured(dev))
1418                                         continue;
1419                                 ifsta->auth_alg = algs[pos];
1420                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1421                                        "next try\n",
1422                                        dev->name, ifsta->auth_alg);
1423                                 break;
1424                         }
1425                 }
1426                 return;
1427         }
1428
1429         switch (ifsta->auth_alg) {
1430         case WLAN_AUTH_OPEN:
1431         case WLAN_AUTH_LEAP:
1432                 ieee80211_auth_completed(dev, ifsta);
1433                 break;
1434         case WLAN_AUTH_SHARED_KEY:
1435                 if (ifsta->auth_transaction == 4)
1436                         ieee80211_auth_completed(dev, ifsta);
1437                 else
1438                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1439                 break;
1440         }
1441 }
1442
1443
1444 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1445                                      struct ieee80211_if_sta *ifsta,
1446                                      struct ieee80211_mgmt *mgmt,
1447                                      size_t len)
1448 {
1449         u16 reason_code;
1450         DECLARE_MAC_BUF(mac);
1451
1452         if (len < 24 + 2) {
1453                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1454                        "received from %s - ignored\n",
1455                        dev->name, len, print_mac(mac, mgmt->sa));
1456                 return;
1457         }
1458
1459         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1460                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1461                        "unknown AP (SA=%s BSSID=%s) - "
1462                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1463                        print_mac(mac, mgmt->bssid));
1464                 return;
1465         }
1466
1467         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1468
1469         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1470                " (reason=%d)\n",
1471                dev->name, print_mac(mac, mgmt->sa), reason_code);
1472
1473         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1474                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1475         }
1476
1477         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1478             ifsta->state == IEEE80211_ASSOCIATE ||
1479             ifsta->state == IEEE80211_ASSOCIATED) {
1480                 ifsta->state = IEEE80211_AUTHENTICATE;
1481                 mod_timer(&ifsta->timer, jiffies +
1482                                       IEEE80211_RETRY_AUTH_INTERVAL);
1483         }
1484
1485         ieee80211_set_disassoc(dev, ifsta, 1);
1486         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1487 }
1488
1489
1490 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1491                                        struct ieee80211_if_sta *ifsta,
1492                                        struct ieee80211_mgmt *mgmt,
1493                                        size_t len)
1494 {
1495         u16 reason_code;
1496         DECLARE_MAC_BUF(mac);
1497
1498         if (len < 24 + 2) {
1499                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1500                        "received from %s - ignored\n",
1501                        dev->name, len, print_mac(mac, mgmt->sa));
1502                 return;
1503         }
1504
1505         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1506                 printk(KERN_DEBUG "%s: disassociation frame received from "
1507                        "unknown AP (SA=%s BSSID=%s) - "
1508                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1509                        print_mac(mac, mgmt->bssid));
1510                 return;
1511         }
1512
1513         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1514
1515         printk(KERN_DEBUG "%s: RX disassociation from %s"
1516                " (reason=%d)\n",
1517                dev->name, print_mac(mac, mgmt->sa), reason_code);
1518
1519         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1520                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1521
1522         if (ifsta->state == IEEE80211_ASSOCIATED) {
1523                 ifsta->state = IEEE80211_ASSOCIATE;
1524                 mod_timer(&ifsta->timer, jiffies +
1525                                       IEEE80211_RETRY_AUTH_INTERVAL);
1526         }
1527
1528         ieee80211_set_disassoc(dev, ifsta, 0);
1529 }
1530
1531
1532 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1533                                          struct ieee80211_if_sta *ifsta,
1534                                          struct ieee80211_mgmt *mgmt,
1535                                          size_t len,
1536                                          int reassoc)
1537 {
1538         struct ieee80211_local *local = sdata->local;
1539         struct net_device *dev = sdata->dev;
1540         struct ieee80211_hw_mode *mode;
1541         struct sta_info *sta;
1542         u32 rates;
1543         u16 capab_info, status_code, aid;
1544         struct ieee802_11_elems elems;
1545         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1546         u8 *pos;
1547         int i, j;
1548         DECLARE_MAC_BUF(mac);
1549
1550         /* AssocResp and ReassocResp have identical structure, so process both
1551          * of them in this function. */
1552
1553         if (ifsta->state != IEEE80211_ASSOCIATE) {
1554                 printk(KERN_DEBUG "%s: association frame received from "
1555                        "%s, but not in associate state - ignored\n",
1556                        dev->name, print_mac(mac, mgmt->sa));
1557                 return;
1558         }
1559
1560         if (len < 24 + 6) {
1561                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1562                        "received from %s - ignored\n",
1563                        dev->name, len, print_mac(mac, mgmt->sa));
1564                 return;
1565         }
1566
1567         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1568                 printk(KERN_DEBUG "%s: association frame received from "
1569                        "unknown AP (SA=%s BSSID=%s) - "
1570                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1571                        print_mac(mac, mgmt->bssid));
1572                 return;
1573         }
1574
1575         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1576         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1577         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1578
1579         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1580                "status=%d aid=%d)\n",
1581                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1582                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1583
1584         if (status_code != WLAN_STATUS_SUCCESS) {
1585                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1586                        dev->name, status_code);
1587                 /* if this was a reassociation, ensure we try a "full"
1588                  * association next time. This works around some broken APs
1589                  * which do not correctly reject reassociation requests. */
1590                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1591                 return;
1592         }
1593
1594         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1595                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1596                        "set\n", dev->name, aid);
1597         aid &= ~(BIT(15) | BIT(14));
1598
1599         pos = mgmt->u.assoc_resp.variable;
1600         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1601
1602         if (!elems.supp_rates) {
1603                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1604                        dev->name);
1605                 return;
1606         }
1607
1608         printk(KERN_DEBUG "%s: associated\n", dev->name);
1609         ifsta->aid = aid;
1610         ifsta->ap_capab = capab_info;
1611
1612         kfree(ifsta->assocresp_ies);
1613         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1614         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1615         if (ifsta->assocresp_ies)
1616                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1617
1618         /* set AID, ieee80211_set_associated() will tell the driver */
1619         bss_conf->aid = aid;
1620         ieee80211_set_associated(dev, ifsta, 1);
1621
1622         /* Add STA entry for the AP */
1623         sta = sta_info_get(local, ifsta->bssid);
1624         if (!sta) {
1625                 struct ieee80211_sta_bss *bss;
1626                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1627                 if (!sta) {
1628                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1629                                " AP\n", dev->name);
1630                         return;
1631                 }
1632                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1633                                            local->hw.conf.channel,
1634                                            ifsta->ssid, ifsta->ssid_len);
1635                 if (bss) {
1636                         sta->last_rssi = bss->rssi;
1637                         sta->last_signal = bss->signal;
1638                         sta->last_noise = bss->noise;
1639                         ieee80211_rx_bss_put(dev, bss);
1640                 }
1641         }
1642
1643         sta->dev = dev;
1644         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1645
1646         rates = 0;
1647         mode = local->oper_hw_mode;
1648         for (i = 0; i < elems.supp_rates_len; i++) {
1649                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1650                 for (j = 0; j < mode->num_rates; j++)
1651                         if (mode->rates[j].rate == rate)
1652                                 rates |= BIT(j);
1653         }
1654         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1655                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1656                 for (j = 0; j < mode->num_rates; j++)
1657                         if (mode->rates[j].rate == rate)
1658                                 rates |= BIT(j);
1659         }
1660         sta->supp_rates = rates;
1661
1662         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1663             local->ops->conf_ht) {
1664                 struct ieee80211_ht_bss_info bss_info;
1665
1666                 ieee80211_ht_cap_ie_to_ht_info(
1667                                 (struct ieee80211_ht_cap *)
1668                                 elems.ht_cap_elem, &sta->ht_info);
1669                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1670                                 (struct ieee80211_ht_addt_info *)
1671                                 elems.ht_info_elem, &bss_info);
1672                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1673         }
1674
1675         rate_control_rate_init(sta, local);
1676
1677         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1678                 sta->flags |= WLAN_STA_WME;
1679                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1680                                          elems.wmm_param_len);
1681         }
1682
1683
1684         sta_info_put(sta);
1685
1686         ieee80211_associated(dev, ifsta);
1687 }
1688
1689
1690 /* Caller must hold local->sta_bss_lock */
1691 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1692                                         struct ieee80211_sta_bss *bss)
1693 {
1694         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1695         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1696         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1697 }
1698
1699
1700 /* Caller must hold local->sta_bss_lock */
1701 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1702                                         struct ieee80211_sta_bss *bss)
1703 {
1704         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1705         struct ieee80211_sta_bss *b, *prev = NULL;
1706         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1707         while (b) {
1708                 if (b == bss) {
1709                         if (!prev)
1710                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1711                                         bss->hnext;
1712                         else
1713                                 prev->hnext = bss->hnext;
1714                         break;
1715                 }
1716                 prev = b;
1717                 b = b->hnext;
1718         }
1719 }
1720
1721
1722 static struct ieee80211_sta_bss *
1723 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1724                      u8 *ssid, u8 ssid_len)
1725 {
1726         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1727         struct ieee80211_sta_bss *bss;
1728
1729         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1730         if (!bss)
1731                 return NULL;
1732         atomic_inc(&bss->users);
1733         atomic_inc(&bss->users);
1734         memcpy(bss->bssid, bssid, ETH_ALEN);
1735         bss->channel = channel;
1736         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1737                 memcpy(bss->ssid, ssid, ssid_len);
1738                 bss->ssid_len = ssid_len;
1739         }
1740
1741         spin_lock_bh(&local->sta_bss_lock);
1742         /* TODO: order by RSSI? */
1743         list_add_tail(&bss->list, &local->sta_bss_list);
1744         __ieee80211_rx_bss_hash_add(dev, bss);
1745         spin_unlock_bh(&local->sta_bss_lock);
1746         return bss;
1747 }
1748
1749
1750 static struct ieee80211_sta_bss *
1751 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1752                      u8 *ssid, u8 ssid_len)
1753 {
1754         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1755         struct ieee80211_sta_bss *bss;
1756
1757         spin_lock_bh(&local->sta_bss_lock);
1758         bss = local->sta_bss_hash[STA_HASH(bssid)];
1759         while (bss) {
1760                 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1761                     bss->channel == channel &&
1762                     bss->ssid_len == ssid_len &&
1763                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1764                         atomic_inc(&bss->users);
1765                         break;
1766                 }
1767                 bss = bss->hnext;
1768         }
1769         spin_unlock_bh(&local->sta_bss_lock);
1770         return bss;
1771 }
1772
1773
1774 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1775 {
1776         kfree(bss->wpa_ie);
1777         kfree(bss->rsn_ie);
1778         kfree(bss->wmm_ie);
1779         kfree(bss->ht_ie);
1780         kfree(bss);
1781 }
1782
1783
1784 static void ieee80211_rx_bss_put(struct net_device *dev,
1785                                  struct ieee80211_sta_bss *bss)
1786 {
1787         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1788         if (!atomic_dec_and_test(&bss->users))
1789                 return;
1790
1791         spin_lock_bh(&local->sta_bss_lock);
1792         __ieee80211_rx_bss_hash_del(dev, bss);
1793         list_del(&bss->list);
1794         spin_unlock_bh(&local->sta_bss_lock);
1795         ieee80211_rx_bss_free(bss);
1796 }
1797
1798
1799 void ieee80211_rx_bss_list_init(struct net_device *dev)
1800 {
1801         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1802         spin_lock_init(&local->sta_bss_lock);
1803         INIT_LIST_HEAD(&local->sta_bss_list);
1804 }
1805
1806
1807 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1808 {
1809         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1810         struct ieee80211_sta_bss *bss, *tmp;
1811
1812         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1813                 ieee80211_rx_bss_put(dev, bss);
1814 }
1815
1816
1817 static void ieee80211_rx_bss_info(struct net_device *dev,
1818                                   struct ieee80211_mgmt *mgmt,
1819                                   size_t len,
1820                                   struct ieee80211_rx_status *rx_status,
1821                                   int beacon)
1822 {
1823         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1824         struct ieee802_11_elems elems;
1825         size_t baselen;
1826         int channel, clen;
1827         struct ieee80211_sta_bss *bss;
1828         struct sta_info *sta;
1829         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1830         u64 timestamp;
1831         DECLARE_MAC_BUF(mac);
1832         DECLARE_MAC_BUF(mac2);
1833
1834         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1835                 return; /* ignore ProbeResp to foreign address */
1836
1837 #if 0
1838         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
1839                dev->name, beacon ? "Beacon" : "Probe Response",
1840                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
1841 #endif
1842
1843         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1844         if (baselen > len)
1845                 return;
1846
1847         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1848
1849         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
1850             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1851 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1852                 static unsigned long last_tsf_debug = 0;
1853                 u64 tsf;
1854                 if (local->ops->get_tsf)
1855                         tsf = local->ops->get_tsf(local_to_hw(local));
1856                 else
1857                         tsf = -1LLU;
1858                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1859                         printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1860                                "%s TSF=0x%llx BCN=0x%llx diff=%lld "
1861                                "@%lu\n",
1862                                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
1863                                (unsigned long long)tsf,
1864                                (unsigned long long)timestamp,
1865                                (unsigned long long)(tsf - timestamp),
1866                                jiffies);
1867                         last_tsf_debug = jiffies;
1868                 }
1869 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1870         }
1871
1872         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1873
1874         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1875             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1876             (sta = sta_info_get(local, mgmt->sa))) {
1877                 struct ieee80211_hw_mode *mode;
1878                 struct ieee80211_rate *rates;
1879                 size_t num_rates;
1880                 u32 supp_rates, prev_rates;
1881                 int i, j;
1882
1883                 mode = local->sta_sw_scanning ?
1884                        local->scan_hw_mode : local->oper_hw_mode;
1885
1886                 if (local->sta_hw_scanning) {
1887                         /* search for the correct mode matches the beacon */
1888                         list_for_each_entry(mode, &local->modes_list, list)
1889                                 if (mode->mode == rx_status->phymode)
1890                                         break;
1891
1892                         if (mode == NULL)
1893                                 mode = local->oper_hw_mode;
1894                 }
1895                 rates = mode->rates;
1896                 num_rates = mode->num_rates;
1897
1898                 supp_rates = 0;
1899                 for (i = 0; i < elems.supp_rates_len +
1900                              elems.ext_supp_rates_len; i++) {
1901                         u8 rate = 0;
1902                         int own_rate;
1903                         if (i < elems.supp_rates_len)
1904                                 rate = elems.supp_rates[i];
1905                         else if (elems.ext_supp_rates)
1906                                 rate = elems.ext_supp_rates
1907                                         [i - elems.supp_rates_len];
1908                         own_rate = 5 * (rate & 0x7f);
1909                         for (j = 0; j < num_rates; j++)
1910                                 if (rates[j].rate == own_rate)
1911                                         supp_rates |= BIT(j);
1912                 }
1913
1914                 prev_rates = sta->supp_rates;
1915                 sta->supp_rates &= supp_rates;
1916                 if (sta->supp_rates == 0) {
1917                         /* No matching rates - this should not really happen.
1918                          * Make sure that at least one rate is marked
1919                          * supported to avoid issues with TX rate ctrl. */
1920                         sta->supp_rates = sdata->u.sta.supp_rates_bits;
1921                 }
1922                 if (sta->supp_rates != prev_rates) {
1923                         printk(KERN_DEBUG "%s: updated supp_rates set for "
1924                                "%s based on beacon info (0x%x & 0x%x -> "
1925                                "0x%x)\n",
1926                                dev->name, print_mac(mac, sta->addr), prev_rates,
1927                                supp_rates, sta->supp_rates);
1928                 }
1929                 sta_info_put(sta);
1930         }
1931
1932         if (!elems.ssid)
1933                 return;
1934
1935         if (elems.ds_params && elems.ds_params_len == 1)
1936                 channel = elems.ds_params[0];
1937         else
1938                 channel = rx_status->channel;
1939
1940         bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1941                                    elems.ssid, elems.ssid_len);
1942         if (!bss) {
1943                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1944                                            elems.ssid, elems.ssid_len);
1945                 if (!bss)
1946                         return;
1947         } else {
1948 #if 0
1949                 /* TODO: order by RSSI? */
1950                 spin_lock_bh(&local->sta_bss_lock);
1951                 list_move_tail(&bss->list, &local->sta_bss_list);
1952                 spin_unlock_bh(&local->sta_bss_lock);
1953 #endif
1954         }
1955
1956         if (bss->probe_resp && beacon) {
1957                 /* Do not allow beacon to override data from Probe Response. */
1958                 ieee80211_rx_bss_put(dev, bss);
1959                 return;
1960         }
1961
1962         /* save the ERP value so that it is available at association time */
1963         if (elems.erp_info && elems.erp_info_len >= 1) {
1964                 bss->erp_value = elems.erp_info[0];
1965                 bss->has_erp_value = 1;
1966         }
1967
1968         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1969         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1970
1971         bss->supp_rates_len = 0;
1972         if (elems.supp_rates) {
1973                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1974                 if (clen > elems.supp_rates_len)
1975                         clen = elems.supp_rates_len;
1976                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1977                        clen);
1978                 bss->supp_rates_len += clen;
1979         }
1980         if (elems.ext_supp_rates) {
1981                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1982                 if (clen > elems.ext_supp_rates_len)
1983                         clen = elems.ext_supp_rates_len;
1984                 memcpy(&bss->supp_rates[bss->supp_rates_len],
1985                        elems.ext_supp_rates, clen);
1986                 bss->supp_rates_len += clen;
1987         }
1988
1989         if (elems.wpa &&
1990             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1991              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1992                 kfree(bss->wpa_ie);
1993                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1994                 if (bss->wpa_ie) {
1995                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1996                         bss->wpa_ie_len = elems.wpa_len + 2;
1997                 } else
1998                         bss->wpa_ie_len = 0;
1999         } else if (!elems.wpa && bss->wpa_ie) {
2000                 kfree(bss->wpa_ie);
2001                 bss->wpa_ie = NULL;
2002                 bss->wpa_ie_len = 0;
2003         }
2004
2005         if (elems.rsn &&
2006             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2007              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2008                 kfree(bss->rsn_ie);
2009                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2010                 if (bss->rsn_ie) {
2011                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2012                         bss->rsn_ie_len = elems.rsn_len + 2;
2013                 } else
2014                         bss->rsn_ie_len = 0;
2015         } else if (!elems.rsn && bss->rsn_ie) {
2016                 kfree(bss->rsn_ie);
2017                 bss->rsn_ie = NULL;
2018                 bss->rsn_ie_len = 0;
2019         }
2020
2021         if (elems.wmm_param &&
2022             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2023              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2024                 kfree(bss->wmm_ie);
2025                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2026                 if (bss->wmm_ie) {
2027                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2028                                elems.wmm_param_len + 2);
2029                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2030                 } else
2031                         bss->wmm_ie_len = 0;
2032         } else if (!elems.wmm_param && bss->wmm_ie) {
2033                 kfree(bss->wmm_ie);
2034                 bss->wmm_ie = NULL;
2035                 bss->wmm_ie_len = 0;
2036         }
2037         if (elems.ht_cap_elem &&
2038             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2039              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2040                 kfree(bss->ht_ie);
2041                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2042                 if (bss->ht_ie) {
2043                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2044                                elems.ht_cap_elem_len + 2);
2045                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2046                 } else
2047                         bss->ht_ie_len = 0;
2048         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2049                 kfree(bss->ht_ie);
2050                 bss->ht_ie = NULL;
2051                 bss->ht_ie_len = 0;
2052         }
2053
2054         bss->hw_mode = rx_status->phymode;
2055         bss->freq = rx_status->freq;
2056         if (channel != rx_status->channel &&
2057             (bss->hw_mode == MODE_IEEE80211G ||
2058              bss->hw_mode == MODE_IEEE80211B) &&
2059             channel >= 1 && channel <= 14) {
2060                 static const int freq_list[] = {
2061                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
2062                         2447, 2452, 2457, 2462, 2467, 2472, 2484
2063                 };
2064                 /* IEEE 802.11g/b mode can receive packets from neighboring
2065                  * channels, so map the channel into frequency. */
2066                 bss->freq = freq_list[channel - 1];
2067         }
2068         bss->timestamp = timestamp;
2069         bss->last_update = jiffies;
2070         bss->rssi = rx_status->ssi;
2071         bss->signal = rx_status->signal;
2072         bss->noise = rx_status->noise;
2073         if (!beacon)
2074                 bss->probe_resp++;
2075         ieee80211_rx_bss_put(dev, bss);
2076 }
2077
2078
2079 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2080                                          struct ieee80211_mgmt *mgmt,
2081                                          size_t len,
2082                                          struct ieee80211_rx_status *rx_status)
2083 {
2084         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2085 }
2086
2087
2088 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2089                                      struct ieee80211_mgmt *mgmt,
2090                                      size_t len,
2091                                      struct ieee80211_rx_status *rx_status)
2092 {
2093         struct ieee80211_sub_if_data *sdata;
2094         struct ieee80211_if_sta *ifsta;
2095         size_t baselen;
2096         struct ieee802_11_elems elems;
2097         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2098         struct ieee80211_conf *conf = &local->hw.conf;
2099         u32 changed = 0;
2100
2101         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2102
2103         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2104         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2105                 return;
2106         ifsta = &sdata->u.sta;
2107
2108         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2109             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2110                 return;
2111
2112         /* Process beacon from the current BSS */
2113         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2114         if (baselen > len)
2115                 return;
2116
2117         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2118
2119         if (elems.erp_info && elems.erp_info_len >= 1)
2120                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2121
2122         if (elems.ht_cap_elem && elems.ht_info_elem &&
2123             elems.wmm_param && local->ops->conf_ht &&
2124             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2125                 struct ieee80211_ht_bss_info bss_info;
2126
2127                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2128                                 (struct ieee80211_ht_addt_info *)
2129                                 elems.ht_info_elem, &bss_info);
2130                 /* check if AP changed bss inforamation */
2131                 if ((conf->ht_bss_conf.primary_channel !=
2132                      bss_info.primary_channel) ||
2133                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2134                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2135                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2136                                                 &bss_info);
2137         }
2138
2139         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2140                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2141                                          elems.wmm_param_len);
2142         }
2143
2144         ieee80211_bss_info_change_notify(sdata, changed);
2145 }
2146
2147
2148 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2149                                         struct ieee80211_if_sta *ifsta,
2150                                         struct ieee80211_mgmt *mgmt,
2151                                         size_t len,
2152                                         struct ieee80211_rx_status *rx_status)
2153 {
2154         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2156         int tx_last_beacon;
2157         struct sk_buff *skb;
2158         struct ieee80211_mgmt *resp;
2159         u8 *pos, *end;
2160         DECLARE_MAC_BUF(mac);
2161 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2162         DECLARE_MAC_BUF(mac2);
2163         DECLARE_MAC_BUF(mac3);
2164 #endif
2165
2166         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2167             ifsta->state != IEEE80211_IBSS_JOINED ||
2168             len < 24 + 2 || !ifsta->probe_resp)
2169                 return;
2170
2171         if (local->ops->tx_last_beacon)
2172                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2173         else
2174                 tx_last_beacon = 1;
2175
2176 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2177         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2178                "%s (tx_last_beacon=%d)\n",
2179                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2180                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2181 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2182
2183         if (!tx_last_beacon)
2184                 return;
2185
2186         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2187             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2188                 return;
2189
2190         end = ((u8 *) mgmt) + len;
2191         pos = mgmt->u.probe_req.variable;
2192         if (pos[0] != WLAN_EID_SSID ||
2193             pos + 2 + pos[1] > end) {
2194                 if (net_ratelimit()) {
2195                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2196                                "from %s\n",
2197                                dev->name, print_mac(mac, mgmt->sa));
2198                 }
2199                 return;
2200         }
2201         if (pos[1] != 0 &&
2202             (pos[1] != ifsta->ssid_len ||
2203              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2204                 /* Ignore ProbeReq for foreign SSID */
2205                 return;
2206         }
2207
2208         /* Reply with ProbeResp */
2209         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2210         if (!skb)
2211                 return;
2212
2213         resp = (struct ieee80211_mgmt *) skb->data;
2214         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2215 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2216         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2217                dev->name, print_mac(mac, resp->da));
2218 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2219         ieee80211_sta_tx(dev, skb, 0);
2220 }
2221
2222 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2223                                      struct ieee80211_if_sta *ifsta,
2224                                      struct ieee80211_mgmt *mgmt,
2225                                      size_t len)
2226 {
2227         if (len < IEEE80211_MIN_ACTION_SIZE)
2228                 return;
2229
2230         switch (mgmt->u.action.category) {
2231         case WLAN_CATEGORY_BACK:
2232                 switch (mgmt->u.action.u.addba_req.action_code) {
2233                 case WLAN_ACTION_ADDBA_REQ:
2234                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2235                                    sizeof(mgmt->u.action.u.addba_req)))
2236                                 break;
2237                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2238                         break;
2239                 case WLAN_ACTION_DELBA:
2240                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2241                                    sizeof(mgmt->u.action.u.delba)))
2242                                 break;
2243                         ieee80211_sta_process_delba(dev, mgmt, len);
2244                         break;
2245                 default:
2246                         if (net_ratelimit())
2247                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2248                                         dev->name);
2249                         break;
2250                 }
2251                 break;
2252         default:
2253                 break;
2254         }
2255 }
2256
2257 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2258                            struct ieee80211_rx_status *rx_status)
2259 {
2260         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2261         struct ieee80211_sub_if_data *sdata;
2262         struct ieee80211_if_sta *ifsta;
2263         struct ieee80211_mgmt *mgmt;
2264         u16 fc;
2265
2266         if (skb->len < 24)
2267                 goto fail;
2268
2269         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2270         ifsta = &sdata->u.sta;
2271
2272         mgmt = (struct ieee80211_mgmt *) skb->data;
2273         fc = le16_to_cpu(mgmt->frame_control);
2274
2275         switch (fc & IEEE80211_FCTL_STYPE) {
2276         case IEEE80211_STYPE_PROBE_REQ:
2277         case IEEE80211_STYPE_PROBE_RESP:
2278         case IEEE80211_STYPE_BEACON:
2279                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2280         case IEEE80211_STYPE_AUTH:
2281         case IEEE80211_STYPE_ASSOC_RESP:
2282         case IEEE80211_STYPE_REASSOC_RESP:
2283         case IEEE80211_STYPE_DEAUTH:
2284         case IEEE80211_STYPE_DISASSOC:
2285         case IEEE80211_STYPE_ACTION:
2286                 skb_queue_tail(&ifsta->skb_queue, skb);
2287                 queue_work(local->hw.workqueue, &ifsta->work);
2288                 return;
2289         default:
2290                 printk(KERN_DEBUG "%s: received unknown management frame - "
2291                        "stype=%d\n", dev->name,
2292                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2293                 break;
2294         }
2295
2296  fail:
2297         kfree_skb(skb);
2298 }
2299
2300
2301 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2302                                          struct sk_buff *skb)
2303 {
2304         struct ieee80211_rx_status *rx_status;
2305         struct ieee80211_sub_if_data *sdata;
2306         struct ieee80211_if_sta *ifsta;
2307         struct ieee80211_mgmt *mgmt;
2308         u16 fc;
2309
2310         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2311         ifsta = &sdata->u.sta;
2312
2313         rx_status = (struct ieee80211_rx_status *) skb->cb;
2314         mgmt = (struct ieee80211_mgmt *) skb->data;
2315         fc = le16_to_cpu(mgmt->frame_control);
2316
2317         switch (fc & IEEE80211_FCTL_STYPE) {
2318         case IEEE80211_STYPE_PROBE_REQ:
2319                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2320                                             rx_status);
2321                 break;
2322         case IEEE80211_STYPE_PROBE_RESP:
2323                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2324                 break;
2325         case IEEE80211_STYPE_BEACON:
2326                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2327                 break;
2328         case IEEE80211_STYPE_AUTH:
2329                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2330                 break;
2331         case IEEE80211_STYPE_ASSOC_RESP:
2332                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2333                 break;
2334         case IEEE80211_STYPE_REASSOC_RESP:
2335                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2336                 break;
2337         case IEEE80211_STYPE_DEAUTH:
2338                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2339                 break;
2340         case IEEE80211_STYPE_DISASSOC:
2341                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2342                 break;
2343         case IEEE80211_STYPE_ACTION:
2344                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2345                 break;
2346         }
2347
2348         kfree_skb(skb);
2349 }
2350
2351
2352 ieee80211_txrx_result
2353 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2354                       struct ieee80211_rx_status *rx_status)
2355 {
2356         struct ieee80211_mgmt *mgmt;
2357         u16 fc;
2358
2359         if (skb->len < 2)
2360                 return TXRX_DROP;
2361
2362         mgmt = (struct ieee80211_mgmt *) skb->data;
2363         fc = le16_to_cpu(mgmt->frame_control);
2364
2365         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2366                 return TXRX_CONTINUE;
2367
2368         if (skb->len < 24)
2369                 return TXRX_DROP;
2370
2371         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2372                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2373                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2374                                                      skb->len, rx_status);
2375                         dev_kfree_skb(skb);
2376                         return TXRX_QUEUED;
2377                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2378                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2379                                                  rx_status);
2380                         dev_kfree_skb(skb);
2381                         return TXRX_QUEUED;
2382                 }
2383         }
2384         return TXRX_CONTINUE;
2385 }
2386
2387
2388 static int ieee80211_sta_active_ibss(struct net_device *dev)
2389 {
2390         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2391         int active = 0;
2392         struct sta_info *sta;
2393
2394         read_lock_bh(&local->sta_lock);
2395         list_for_each_entry(sta, &local->sta_list, list) {
2396                 if (sta->dev == dev &&
2397                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2398                                jiffies)) {
2399                         active++;
2400                         break;
2401                 }
2402         }
2403         read_unlock_bh(&local->sta_lock);
2404
2405         return active;
2406 }
2407
2408
2409 static void ieee80211_sta_expire(struct net_device *dev)
2410 {
2411         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2412         struct sta_info *sta, *tmp;
2413         LIST_HEAD(tmp_list);
2414         DECLARE_MAC_BUF(mac);
2415
2416         write_lock_bh(&local->sta_lock);
2417         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2418                 if (time_after(jiffies, sta->last_rx +
2419                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2420                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2421                                dev->name, print_mac(mac, sta->addr));
2422                         __sta_info_get(sta);
2423                         sta_info_remove(sta);
2424                         list_add(&sta->list, &tmp_list);
2425                 }
2426         write_unlock_bh(&local->sta_lock);
2427
2428         list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2429                 sta_info_free(sta);
2430                 sta_info_put(sta);
2431         }
2432 }
2433
2434
2435 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2436                                      struct ieee80211_if_sta *ifsta)
2437 {
2438         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2439
2440         ieee80211_sta_expire(dev);
2441         if (ieee80211_sta_active_ibss(dev))
2442                 return;
2443
2444         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2445                "IBSS networks with same SSID (merge)\n", dev->name);
2446         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2447 }
2448
2449
2450 void ieee80211_sta_timer(unsigned long data)
2451 {
2452         struct ieee80211_sub_if_data *sdata =
2453                 (struct ieee80211_sub_if_data *) data;
2454         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2455         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2456
2457         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2458         queue_work(local->hw.workqueue, &ifsta->work);
2459 }
2460
2461
2462 void ieee80211_sta_work(struct work_struct *work)
2463 {
2464         struct ieee80211_sub_if_data *sdata =
2465                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2466         struct net_device *dev = sdata->dev;
2467         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2468         struct ieee80211_if_sta *ifsta;
2469         struct sk_buff *skb;
2470
2471         if (!netif_running(dev))
2472                 return;
2473
2474         if (local->sta_sw_scanning || local->sta_hw_scanning)
2475                 return;
2476
2477         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2478             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2479                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2480                        "(type=%d)\n", dev->name, sdata->vif.type);
2481                 return;
2482         }
2483         ifsta = &sdata->u.sta;
2484
2485         while ((skb = skb_dequeue(&ifsta->skb_queue)))
2486                 ieee80211_sta_rx_queued_mgmt(dev, skb);
2487
2488         if (ifsta->state != IEEE80211_AUTHENTICATE &&
2489             ifsta->state != IEEE80211_ASSOCIATE &&
2490             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2491                 if (ifsta->scan_ssid_len)
2492                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2493                 else
2494                         ieee80211_sta_start_scan(dev, NULL, 0);
2495                 return;
2496         }
2497
2498         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2499                 if (ieee80211_sta_config_auth(dev, ifsta))
2500                         return;
2501                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2502         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2503                 return;
2504
2505         switch (ifsta->state) {
2506         case IEEE80211_DISABLED:
2507                 break;
2508         case IEEE80211_AUTHENTICATE:
2509                 ieee80211_authenticate(dev, ifsta);
2510                 break;
2511         case IEEE80211_ASSOCIATE:
2512                 ieee80211_associate(dev, ifsta);
2513                 break;
2514         case IEEE80211_ASSOCIATED:
2515                 ieee80211_associated(dev, ifsta);
2516                 break;
2517         case IEEE80211_IBSS_SEARCH:
2518                 ieee80211_sta_find_ibss(dev, ifsta);
2519                 break;
2520         case IEEE80211_IBSS_JOINED:
2521                 ieee80211_sta_merge_ibss(dev, ifsta);
2522                 break;
2523         default:
2524                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2525                        ifsta->state);
2526                 break;
2527         }
2528
2529         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2530                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2531                        "mixed-cell disabled - disassociate\n", dev->name);
2532
2533                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2534                 ieee80211_set_disassoc(dev, ifsta, 0);
2535         }
2536 }
2537
2538
2539 static void ieee80211_sta_reset_auth(struct net_device *dev,
2540                                      struct ieee80211_if_sta *ifsta)
2541 {
2542         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2543
2544         if (local->ops->reset_tsf) {
2545                 /* Reset own TSF to allow time synchronization work. */
2546                 local->ops->reset_tsf(local_to_hw(local));
2547         }
2548
2549         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2550
2551
2552         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2553                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2554         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2555                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2556         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2557                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2558         else
2559                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2560         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2561                ifsta->auth_alg);
2562         ifsta->auth_transaction = -1;
2563         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2564         ifsta->auth_tries = ifsta->assoc_tries = 0;
2565         netif_carrier_off(dev);
2566 }
2567
2568
2569 void ieee80211_sta_req_auth(struct net_device *dev,
2570                             struct ieee80211_if_sta *ifsta)
2571 {
2572         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2573         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2574
2575         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2576                 return;
2577
2578         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2579                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2580             (ifsta->flags & (IEEE80211_STA_SSID_SET |
2581                                 IEEE80211_STA_AUTO_SSID_SEL))) {
2582                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2583                 queue_work(local->hw.workqueue, &ifsta->work);
2584         }
2585 }
2586
2587 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2588                                     const char *ssid, int ssid_len)
2589 {
2590         int tmp, hidden_ssid;
2591
2592         if (ssid_len == ifsta->ssid_len &&
2593             !memcmp(ifsta->ssid, ssid, ssid_len))
2594                 return 1;
2595
2596         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2597                 return 0;
2598
2599         hidden_ssid = 1;
2600         tmp = ssid_len;
2601         while (tmp--) {
2602                 if (ssid[tmp] != '\0') {
2603                         hidden_ssid = 0;
2604                         break;
2605                 }
2606         }
2607
2608         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2609                 return 1;
2610
2611         if (ssid_len == 1 && ssid[0] == ' ')
2612                 return 1;
2613
2614         return 0;
2615 }
2616
2617 static int ieee80211_sta_config_auth(struct net_device *dev,
2618                                      struct ieee80211_if_sta *ifsta)
2619 {
2620         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2621         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2622         struct ieee80211_sta_bss *bss, *selected = NULL;
2623         int top_rssi = 0, freq;
2624
2625         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2626             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2627                 ifsta->state = IEEE80211_AUTHENTICATE;
2628                 ieee80211_sta_reset_auth(dev, ifsta);
2629                 return 0;
2630         }
2631
2632         spin_lock_bh(&local->sta_bss_lock);
2633         freq = local->oper_channel->freq;
2634         list_for_each_entry(bss, &local->sta_bss_list, list) {
2635                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2636                         continue;
2637
2638                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2639                     !!sdata->default_key)
2640                         continue;
2641
2642                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2643                     bss->freq != freq)
2644                         continue;
2645
2646                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2647                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2648                         continue;
2649
2650                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2651                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2652                         continue;
2653
2654                 if (!selected || top_rssi < bss->rssi) {
2655                         selected = bss;
2656                         top_rssi = bss->rssi;
2657                 }
2658         }
2659         if (selected)
2660                 atomic_inc(&selected->users);
2661         spin_unlock_bh(&local->sta_bss_lock);
2662
2663         if (selected) {
2664                 ieee80211_set_channel(local, -1, selected->freq);
2665                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2666                         ieee80211_sta_set_ssid(dev, selected->ssid,
2667                                                selected->ssid_len);
2668                 ieee80211_sta_set_bssid(dev, selected->bssid);
2669                 ieee80211_rx_bss_put(dev, selected);
2670                 ifsta->state = IEEE80211_AUTHENTICATE;
2671                 ieee80211_sta_reset_auth(dev, ifsta);
2672                 return 0;
2673         } else {
2674                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2675                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2676                                 ieee80211_sta_start_scan(dev, NULL, 0);
2677                         else
2678                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2679                                                          ifsta->ssid_len);
2680                         ifsta->state = IEEE80211_AUTHENTICATE;
2681                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2682                 } else
2683                         ifsta->state = IEEE80211_DISABLED;
2684         }
2685         return -1;
2686 }
2687
2688 static int ieee80211_sta_join_ibss(struct net_device *dev,
2689                                    struct ieee80211_if_sta *ifsta,
2690                                    struct ieee80211_sta_bss *bss)
2691 {
2692         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2693         int res, rates, i, j;
2694         struct sk_buff *skb;
2695         struct ieee80211_mgmt *mgmt;
2696         struct ieee80211_tx_control control;
2697         struct ieee80211_hw_mode *mode;
2698         struct rate_selection ratesel;
2699         u8 *pos;
2700         struct ieee80211_sub_if_data *sdata;
2701
2702         /* Remove possible STA entries from other IBSS networks. */
2703         sta_info_flush(local, NULL);
2704
2705         if (local->ops->reset_tsf) {
2706                 /* Reset own TSF to allow time synchronization work. */
2707                 local->ops->reset_tsf(local_to_hw(local));
2708         }
2709         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2710         res = ieee80211_if_config(dev);
2711         if (res)
2712                 return res;
2713
2714         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2715
2716         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2717         sdata->drop_unencrypted = bss->capability &
2718                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2719
2720         res = ieee80211_set_channel(local, -1, bss->freq);
2721
2722         if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2723                 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2724                        "(%d MHz)\n", dev->name, local->hw.conf.channel,
2725                        local->hw.conf.freq);
2726                 return -1;
2727         }
2728
2729         /* Set beacon template based on scan results */
2730         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2731         do {
2732                 if (!skb)
2733                         break;
2734
2735                 skb_reserve(skb, local->hw.extra_tx_headroom);
2736
2737                 mgmt = (struct ieee80211_mgmt *)
2738                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2739                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2740                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2741                                                    IEEE80211_STYPE_BEACON);
2742                 memset(mgmt->da, 0xff, ETH_ALEN);
2743                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2744                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2745                 mgmt->u.beacon.beacon_int =
2746                         cpu_to_le16(local->hw.conf.beacon_int);
2747                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2748
2749                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2750                 *pos++ = WLAN_EID_SSID;
2751                 *pos++ = ifsta->ssid_len;
2752                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2753
2754                 rates = bss->supp_rates_len;
2755                 if (rates > 8)
2756                         rates = 8;
2757                 pos = skb_put(skb, 2 + rates);
2758                 *pos++ = WLAN_EID_SUPP_RATES;
2759                 *pos++ = rates;
2760                 memcpy(pos, bss->supp_rates, rates);
2761
2762                 pos = skb_put(skb, 2 + 1);
2763                 *pos++ = WLAN_EID_DS_PARAMS;
2764                 *pos++ = 1;
2765                 *pos++ = bss->channel;
2766
2767                 pos = skb_put(skb, 2 + 2);
2768                 *pos++ = WLAN_EID_IBSS_PARAMS;
2769                 *pos++ = 2;
2770                 /* FIX: set ATIM window based on scan results */
2771                 *pos++ = 0;
2772                 *pos++ = 0;
2773
2774                 if (bss->supp_rates_len > 8) {
2775                         rates = bss->supp_rates_len - 8;
2776                         pos = skb_put(skb, 2 + rates);
2777                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2778                         *pos++ = rates;
2779                         memcpy(pos, &bss->supp_rates[8], rates);
2780                 }
2781
2782                 memset(&control, 0, sizeof(control));
2783                 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2784                 if (!ratesel.rate) {
2785                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2786                                "for IBSS beacon\n", dev->name);
2787                         break;
2788                 }
2789                 control.vif = &sdata->vif;
2790                 control.tx_rate =
2791                         (sdata->bss_conf.use_short_preamble &&
2792                         (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2793                         ratesel.rate->val2 : ratesel.rate->val;
2794                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2795                 control.power_level = local->hw.conf.power_level;
2796                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2797                 control.retry_limit = 1;
2798
2799                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2800                 if (ifsta->probe_resp) {
2801                         mgmt = (struct ieee80211_mgmt *)
2802                                 ifsta->probe_resp->data;
2803                         mgmt->frame_control =
2804                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2805                                              IEEE80211_STYPE_PROBE_RESP);
2806                 } else {
2807                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2808                                "template for IBSS\n", dev->name);
2809                 }
2810
2811                 if (local->ops->beacon_update &&
2812                     local->ops->beacon_update(local_to_hw(local),
2813                                              skb, &control) == 0) {
2814                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2815                                "template based on scan results\n", dev->name);
2816                         skb = NULL;
2817                 }
2818
2819                 rates = 0;
2820                 mode = local->oper_hw_mode;
2821                 for (i = 0; i < bss->supp_rates_len; i++) {
2822                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2823                         for (j = 0; j < mode->num_rates; j++)
2824                                 if (mode->rates[j].rate == bitrate)
2825                                         rates |= BIT(j);
2826                 }
2827                 ifsta->supp_rates_bits = rates;
2828         } while (0);
2829
2830         if (skb) {
2831                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2832                        "template\n", dev->name);
2833                 dev_kfree_skb(skb);
2834         }
2835
2836         ifsta->state = IEEE80211_IBSS_JOINED;
2837         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2838
2839         ieee80211_rx_bss_put(dev, bss);
2840
2841         return res;
2842 }
2843
2844
2845 static int ieee80211_sta_create_ibss(struct net_device *dev,
2846                                      struct ieee80211_if_sta *ifsta)
2847 {
2848         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2849         struct ieee80211_sta_bss *bss;
2850         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2851         struct ieee80211_hw_mode *mode;
2852         u8 bssid[ETH_ALEN], *pos;
2853         int i;
2854         DECLARE_MAC_BUF(mac);
2855
2856 #if 0
2857         /* Easier testing, use fixed BSSID. */
2858         memset(bssid, 0xfe, ETH_ALEN);
2859 #else
2860         /* Generate random, not broadcast, locally administered BSSID. Mix in
2861          * own MAC address to make sure that devices that do not have proper
2862          * random number generator get different BSSID. */
2863         get_random_bytes(bssid, ETH_ALEN);
2864         for (i = 0; i < ETH_ALEN; i++)
2865                 bssid[i] ^= dev->dev_addr[i];
2866         bssid[0] &= ~0x01;
2867         bssid[0] |= 0x02;
2868 #endif
2869
2870         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2871                dev->name, print_mac(mac, bssid));
2872
2873         bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2874                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2875         if (!bss)
2876                 return -ENOMEM;
2877
2878         mode = local->oper_hw_mode;
2879
2880         if (local->hw.conf.beacon_int == 0)
2881                 local->hw.conf.beacon_int = 100;
2882         bss->beacon_int = local->hw.conf.beacon_int;
2883         bss->hw_mode = local->hw.conf.phymode;
2884         bss->freq = local->hw.conf.freq;
2885         bss->last_update = jiffies;
2886         bss->capability = WLAN_CAPABILITY_IBSS;
2887         if (sdata->default_key) {
2888                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2889         } else
2890                 sdata->drop_unencrypted = 0;
2891         bss->supp_rates_len = mode->num_rates;
2892         pos = bss->supp_rates;
2893         for (i = 0; i < mode->num_rates; i++) {
2894                 int rate = mode->rates[i].rate;
2895                 *pos++ = (u8) (rate / 5);
2896         }
2897
2898         return ieee80211_sta_join_ibss(dev, ifsta, bss);
2899 }
2900
2901
2902 static int ieee80211_sta_find_ibss(struct net_device *dev,
2903                                    struct ieee80211_if_sta *ifsta)
2904 {
2905         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2906         struct ieee80211_sta_bss *bss;
2907         int found = 0;
2908         u8 bssid[ETH_ALEN];
2909         int active_ibss;
2910         DECLARE_MAC_BUF(mac);
2911         DECLARE_MAC_BUF(mac2);
2912
2913         if (ifsta->ssid_len == 0)
2914                 return -EINVAL;
2915
2916         active_ibss = ieee80211_sta_active_ibss(dev);
2917 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2918         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2919                dev->name, active_ibss);
2920 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2921         spin_lock_bh(&local->sta_bss_lock);
2922         list_for_each_entry(bss, &local->sta_bss_list, list) {
2923                 if (ifsta->ssid_len != bss->ssid_len ||
2924                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2925                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
2926                         continue;
2927 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2928                 printk(KERN_DEBUG "   bssid=%s found\n",
2929                        print_mac(mac, bss->bssid));
2930 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2931                 memcpy(bssid, bss->bssid, ETH_ALEN);
2932                 found = 1;
2933                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2934                         break;
2935         }
2936         spin_unlock_bh(&local->sta_bss_lock);
2937
2938 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2939         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
2940                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
2941 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2942         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2943             (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2944                                         ifsta->ssid, ifsta->ssid_len))) {
2945                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2946                        " based on configured SSID\n",
2947                        dev->name, print_mac(mac, bssid));
2948                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2949         }
2950 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2951         printk(KERN_DEBUG "   did not try to join ibss\n");
2952 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2953
2954         /* Selected IBSS not found in current scan results - try to scan */
2955         if (ifsta->state == IEEE80211_IBSS_JOINED &&
2956             !ieee80211_sta_active_ibss(dev)) {
2957                 mod_timer(&ifsta->timer, jiffies +
2958                                       IEEE80211_IBSS_MERGE_INTERVAL);
2959         } else if (time_after(jiffies, local->last_scan_completed +
2960                               IEEE80211_SCAN_INTERVAL)) {
2961                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2962                        "join\n", dev->name);
2963                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2964                                               ifsta->ssid_len);
2965         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2966                 int interval = IEEE80211_SCAN_INTERVAL;
2967
2968                 if (time_after(jiffies, ifsta->ibss_join_req +
2969                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
2970                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2971                             local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2972                                 return ieee80211_sta_create_ibss(dev, ifsta);
2973                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2974                                 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2975                                        " configured channel %d (%d MHz)\n",
2976                                        dev->name, local->hw.conf.channel,
2977                                        local->hw.conf.freq);
2978                         }
2979
2980                         /* No IBSS found - decrease scan interval and continue
2981                          * scanning. */
2982                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
2983                 }
2984
2985                 ifsta->state = IEEE80211_IBSS_SEARCH;
2986                 mod_timer(&ifsta->timer, jiffies + interval);
2987                 return 0;
2988         }
2989
2990         return 0;
2991 }
2992
2993
2994 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2995 {
2996         struct ieee80211_sub_if_data *sdata;
2997         struct ieee80211_if_sta *ifsta;
2998         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2999
3000         if (len > IEEE80211_MAX_SSID_LEN)
3001                 return -EINVAL;
3002
3003         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3004          * not defined. */
3005         if (local->ops->conf_tx) {
3006                 struct ieee80211_tx_queue_params qparam;
3007                 int i;
3008
3009                 memset(&qparam, 0, sizeof(qparam));
3010                 /* TODO: are these ok defaults for all hw_modes? */
3011                 qparam.aifs = 2;
3012                 qparam.cw_min =
3013                         local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3014                 qparam.cw_max = 1023;
3015                 qparam.burst_time = 0;
3016                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3017                 {
3018                         local->ops->conf_tx(local_to_hw(local),
3019                                            i + IEEE80211_TX_QUEUE_DATA0,
3020                                            &qparam);
3021                 }
3022                 /* IBSS uses different parameters for Beacon sending */
3023                 qparam.cw_min++;
3024                 qparam.cw_min *= 2;
3025                 qparam.cw_min--;
3026                 local->ops->conf_tx(local_to_hw(local),
3027                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
3028         }
3029
3030         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3031         ifsta = &sdata->u.sta;
3032
3033         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3034                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3035         memcpy(ifsta->ssid, ssid, len);
3036         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3037         ifsta->ssid_len = len;
3038
3039         if (len)
3040                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3041         else
3042                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3043         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3044             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3045                 ifsta->ibss_join_req = jiffies;
3046                 ifsta->state = IEEE80211_IBSS_SEARCH;
3047                 return ieee80211_sta_find_ibss(dev, ifsta);
3048         }
3049         return 0;
3050 }
3051
3052
3053 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3054 {
3055         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3056         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3057         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3058         *len = ifsta->ssid_len;
3059         return 0;
3060 }
3061
3062
3063 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3064 {
3065         struct ieee80211_sub_if_data *sdata;
3066         struct ieee80211_if_sta *ifsta;
3067         int res;
3068
3069         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3070         ifsta = &sdata->u.sta;
3071
3072         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3073                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3074                 res = ieee80211_if_config(dev);
3075                 if (res) {
3076                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3077                                "the low-level driver\n", dev->name);
3078                         return res;
3079                 }
3080         }
3081
3082         if (is_valid_ether_addr(bssid))
3083                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3084         else
3085                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3086
3087         return 0;
3088 }
3089
3090
3091 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3092                                     struct ieee80211_sub_if_data *sdata,
3093                                     int powersave)
3094 {
3095         struct sk_buff *skb;
3096         struct ieee80211_hdr *nullfunc;
3097         u16 fc;
3098
3099         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3100         if (!skb) {
3101                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3102                        "frame\n", sdata->dev->name);
3103                 return;
3104         }
3105         skb_reserve(skb, local->hw.extra_tx_headroom);
3106
3107         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3108         memset(nullfunc, 0, 24);
3109         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3110              IEEE80211_FCTL_TODS;
3111         if (powersave)
3112                 fc |= IEEE80211_FCTL_PM;
3113         nullfunc->frame_control = cpu_to_le16(fc);
3114         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3115         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3116         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3117
3118         ieee80211_sta_tx(sdata->dev, skb, 0);
3119 }
3120
3121
3122 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3123 {
3124         struct ieee80211_local *local = hw_to_local(hw);
3125         struct net_device *dev = local->scan_dev;
3126         struct ieee80211_sub_if_data *sdata;
3127         union iwreq_data wrqu;
3128
3129         local->last_scan_completed = jiffies;
3130         memset(&wrqu, 0, sizeof(wrqu));
3131         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3132
3133         if (local->sta_hw_scanning) {
3134                 local->sta_hw_scanning = 0;
3135                 goto done;
3136         }
3137
3138         local->sta_sw_scanning = 0;
3139         if (ieee80211_hw_config(local))
3140                 printk(KERN_DEBUG "%s: failed to restore operational "
3141                        "channel after scan\n", dev->name);
3142
3143
3144         netif_tx_lock_bh(local->mdev);
3145         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3146         local->ops->configure_filter(local_to_hw(local),
3147                                      FIF_BCN_PRBRESP_PROMISC,
3148                                      &local->filter_flags,
3149                                      local->mdev->mc_count,
3150                                      local->mdev->mc_list);
3151
3152         netif_tx_unlock_bh(local->mdev);
3153
3154         rcu_read_lock();
3155         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3156
3157                 /* No need to wake the master device. */
3158                 if (sdata->dev == local->mdev)
3159                         continue;
3160
3161                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3162                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3163                                 ieee80211_send_nullfunc(local, sdata, 0);
3164                         ieee80211_sta_timer((unsigned long)sdata);
3165                 }
3166
3167                 netif_wake_queue(sdata->dev);
3168         }
3169         rcu_read_unlock();
3170
3171 done:
3172         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3173         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3174                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3175                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3176                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3177                     !ieee80211_sta_active_ibss(dev)))
3178                         ieee80211_sta_find_ibss(dev, ifsta);
3179         }
3180 }
3181 EXPORT_SYMBOL(ieee80211_scan_completed);
3182
3183 void ieee80211_sta_scan_work(struct work_struct *work)
3184 {
3185         struct ieee80211_local *local =
3186                 container_of(work, struct ieee80211_local, scan_work.work);
3187         struct net_device *dev = local->scan_dev;
3188         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3189         struct ieee80211_hw_mode *mode;
3190         struct ieee80211_channel *chan;
3191         int skip;
3192         unsigned long next_delay = 0;
3193
3194         if (!local->sta_sw_scanning)
3195                 return;
3196
3197         switch (local->scan_state) {
3198         case SCAN_SET_CHANNEL:
3199                 mode = local->scan_hw_mode;
3200                 if (local->scan_hw_mode->list.next == &local->modes_list &&
3201                     local->scan_channel_idx >= mode->num_channels) {
3202                         ieee80211_scan_completed(local_to_hw(local));
3203                         return;
3204                 }
3205                 skip = !(local->enabled_modes & (1 << mode->mode));
3206                 chan = &mode->channels[local->scan_channel_idx];
3207                 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3208                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3209                      !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3210                     (local->hw_modes & local->enabled_modes &
3211                      (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3212                         skip = 1;
3213
3214                 if (!skip) {
3215 #if 0
3216                         printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3217                                dev->name, chan->chan, chan->freq);
3218 #endif
3219
3220                         local->scan_channel = chan;
3221                         if (ieee80211_hw_config(local)) {
3222                                 printk(KERN_DEBUG "%s: failed to set channel "
3223                                        "%d (%d MHz) for scan\n", dev->name,
3224                                        chan->chan, chan->freq);
3225                                 skip = 1;
3226                         }
3227                 }
3228
3229                 local->scan_channel_idx++;
3230                 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3231                         if (local->scan_hw_mode->list.next != &local->modes_list) {
3232                                 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3233                                                                  struct ieee80211_hw_mode,
3234                                                                  list);
3235                                 local->scan_channel_idx = 0;
3236                         }
3237                 }
3238
3239                 if (skip)
3240                         break;
3241
3242                 next_delay = IEEE80211_PROBE_DELAY +
3243                              usecs_to_jiffies(local->hw.channel_change_time);
3244                 local->scan_state = SCAN_SEND_PROBE;
3245                 break;
3246         case SCAN_SEND_PROBE:
3247                 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3248                         ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3249                                                  local->scan_ssid_len);
3250                         next_delay = IEEE80211_CHANNEL_TIME;
3251                 } else
3252                         next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3253                 local->scan_state = SCAN_SET_CHANNEL;
3254                 break;
3255         }
3256
3257         if (local->sta_sw_scanning)
3258                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3259                                    next_delay);
3260 }
3261
3262
3263 static int ieee80211_sta_start_scan(struct net_device *dev,
3264                                     u8 *ssid, size_t ssid_len)
3265 {
3266         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3267         struct ieee80211_sub_if_data *sdata;
3268
3269         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3270                 return -EINVAL;
3271
3272         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3273          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3274          * BSSID: MACAddress
3275          * SSID
3276          * ScanType: ACTIVE, PASSIVE
3277          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3278          *    a Probe frame during active scanning
3279          * ChannelList
3280          * MinChannelTime (>= ProbeDelay), in TU
3281          * MaxChannelTime: (>= MinChannelTime), in TU
3282          */
3283
3284          /* MLME-SCAN.confirm
3285           * BSSDescriptionSet
3286           * ResultCode: SUCCESS, INVALID_PARAMETERS
3287          */
3288
3289         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3290                 if (local->scan_dev == dev)
3291                         return 0;
3292                 return -EBUSY;
3293         }
3294
3295         if (local->ops->hw_scan) {
3296                 int rc = local->ops->hw_scan(local_to_hw(local),
3297                                              ssid, ssid_len);
3298                 if (!rc) {
3299                         local->sta_hw_scanning = 1;
3300                         local->scan_dev = dev;
3301                 }
3302                 return rc;
3303         }
3304
3305         local->sta_sw_scanning = 1;
3306
3307         rcu_read_lock();
3308         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3309
3310                 /* Don't stop the master interface, otherwise we can't transmit
3311                  * probes! */
3312                 if (sdata->dev == local->mdev)
3313                         continue;
3314
3315                 netif_stop_queue(sdata->dev);
3316                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3317                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3318                         ieee80211_send_nullfunc(local, sdata, 1);
3319         }
3320         rcu_read_unlock();
3321
3322         if (ssid) {
3323                 local->scan_ssid_len = ssid_len;
3324                 memcpy(local->scan_ssid, ssid, ssid_len);
3325         } else
3326                 local->scan_ssid_len = 0;
3327         local->scan_state = SCAN_SET_CHANNEL;
3328         local->scan_hw_mode = list_entry(local->modes_list.next,
3329                                          struct ieee80211_hw_mode,
3330                                          list);
3331         local->scan_channel_idx = 0;
3332         local->scan_dev = dev;
3333
3334         netif_tx_lock_bh(local->mdev);
3335         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3336         local->ops->configure_filter(local_to_hw(local),
3337                                      FIF_BCN_PRBRESP_PROMISC,
3338                                      &local->filter_flags,
3339                                      local->mdev->mc_count,
3340                                      local->mdev->mc_list);
3341         netif_tx_unlock_bh(local->mdev);
3342
3343         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3344         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3345                            IEEE80211_CHANNEL_TIME);
3346
3347         return 0;
3348 }
3349
3350
3351 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3352 {
3353         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3354         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3355         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3356
3357         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3358                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3359
3360         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3361                 if (local->scan_dev == dev)
3362                         return 0;
3363                 return -EBUSY;
3364         }
3365
3366         ifsta->scan_ssid_len = ssid_len;
3367         if (ssid_len)
3368                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3369         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3370         queue_work(local->hw.workqueue, &ifsta->work);
3371         return 0;
3372 }
3373
3374 static char *
3375 ieee80211_sta_scan_result(struct net_device *dev,
3376                           struct ieee80211_sta_bss *bss,
3377                           char *current_ev, char *end_buf)
3378 {
3379         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3380         struct iw_event iwe;
3381
3382         if (time_after(jiffies,
3383                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3384                 return current_ev;
3385
3386         if (!(local->enabled_modes & (1 << bss->hw_mode)))
3387                 return current_ev;
3388
3389         memset(&iwe, 0, sizeof(iwe));
3390         iwe.cmd = SIOCGIWAP;
3391         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3392         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3393         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3394                                           IW_EV_ADDR_LEN);
3395
3396         memset(&iwe, 0, sizeof(iwe));
3397         iwe.cmd = SIOCGIWESSID;
3398         iwe.u.data.length = bss->ssid_len;
3399         iwe.u.data.flags = 1;
3400         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3401                                           bss->ssid);
3402
3403         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3404                 memset(&iwe, 0, sizeof(iwe));
3405                 iwe.cmd = SIOCGIWMODE;
3406                 if (bss->capability & WLAN_CAPABILITY_ESS)
3407                         iwe.u.mode = IW_MODE_MASTER;
3408                 else
3409                         iwe.u.mode = IW_MODE_ADHOC;
3410                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3411                                                   IW_EV_UINT_LEN);
3412         }
3413
3414         memset(&iwe, 0, sizeof(iwe));
3415         iwe.cmd = SIOCGIWFREQ;
3416         iwe.u.freq.m = bss->channel;
3417         iwe.u.freq.e = 0;
3418         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3419                                           IW_EV_FREQ_LEN);
3420         iwe.u.freq.m = bss->freq * 100000;
3421         iwe.u.freq.e = 1;
3422         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3423                                           IW_EV_FREQ_LEN);
3424
3425         memset(&iwe, 0, sizeof(iwe));
3426         iwe.cmd = IWEVQUAL;
3427         iwe.u.qual.qual = bss->signal;
3428         iwe.u.qual.level = bss->rssi;
3429         iwe.u.qual.noise = bss->noise;
3430         iwe.u.qual.updated = local->wstats_flags;
3431         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3432                                           IW_EV_QUAL_LEN);
3433
3434         memset(&iwe, 0, sizeof(iwe));
3435         iwe.cmd = SIOCGIWENCODE;
3436         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3437                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3438         else
3439                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3440         iwe.u.data.length = 0;
3441         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3442
3443         if (bss && bss->wpa_ie) {
3444                 memset(&iwe, 0, sizeof(iwe));
3445                 iwe.cmd = IWEVGENIE;
3446                 iwe.u.data.length = bss->wpa_ie_len;
3447                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3448                                                   bss->wpa_ie);
3449         }
3450
3451         if (bss && bss->rsn_ie) {
3452                 memset(&iwe, 0, sizeof(iwe));
3453                 iwe.cmd = IWEVGENIE;
3454                 iwe.u.data.length = bss->rsn_ie_len;
3455                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3456                                                   bss->rsn_ie);
3457         }
3458
3459         if (bss && bss->supp_rates_len > 0) {
3460                 /* display all supported rates in readable format */
3461                 char *p = current_ev + IW_EV_LCP_LEN;
3462                 int i;
3463
3464                 memset(&iwe, 0, sizeof(iwe));
3465                 iwe.cmd = SIOCGIWRATE;
3466                 /* Those two flags are ignored... */
3467                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3468
3469                 for (i = 0; i < bss->supp_rates_len; i++) {
3470                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3471                                                         0x7f) * 500000);
3472                         p = iwe_stream_add_value(current_ev, p,
3473                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3474                 }
3475                 current_ev = p;
3476         }
3477
3478         if (bss) {
3479                 char *buf;
3480                 buf = kmalloc(30, GFP_ATOMIC);
3481                 if (buf) {
3482                         memset(&iwe, 0, sizeof(iwe));
3483                         iwe.cmd = IWEVCUSTOM;
3484                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3485                         iwe.u.data.length = strlen(buf);
3486                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3487                                                           &iwe, buf);
3488                         kfree(buf);
3489                 }
3490         }
3491
3492         return current_ev;
3493 }
3494
3495
3496 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3497 {
3498         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3499         char *current_ev = buf;
3500         char *end_buf = buf + len;
3501         struct ieee80211_sta_bss *bss;
3502
3503         spin_lock_bh(&local->sta_bss_lock);
3504         list_for_each_entry(bss, &local->sta_bss_list, list) {
3505                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3506                         spin_unlock_bh(&local->sta_bss_lock);
3507                         return -E2BIG;
3508                 }
3509                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3510                                                        end_buf);
3511         }
3512         spin_unlock_bh(&local->sta_bss_lock);
3513         return current_ev - buf;
3514 }
3515
3516
3517 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3518 {
3519         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3520         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3521         kfree(ifsta->extra_ie);
3522         if (len == 0) {
3523                 ifsta->extra_ie = NULL;
3524                 ifsta->extra_ie_len = 0;
3525                 return 0;
3526         }
3527         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3528         if (!ifsta->extra_ie) {
3529                 ifsta->extra_ie_len = 0;
3530                 return -ENOMEM;
3531         }
3532         memcpy(ifsta->extra_ie, ie, len);
3533         ifsta->extra_ie_len = len;
3534         return 0;
3535 }
3536
3537
3538 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3539                                          struct sk_buff *skb, u8 *bssid,
3540                                          u8 *addr)
3541 {
3542         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3543         struct sta_info *sta;
3544         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3545         DECLARE_MAC_BUF(mac);
3546
3547         /* TODO: Could consider removing the least recently used entry and
3548          * allow new one to be added. */
3549         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3550                 if (net_ratelimit()) {
3551                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3552                                "entry %s\n", dev->name, print_mac(mac, addr));
3553                 }
3554                 return NULL;
3555         }
3556
3557         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3558                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3559
3560         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3561         if (!sta)
3562                 return NULL;
3563
3564         sta->supp_rates = sdata->u.sta.supp_rates_bits;
3565
3566         rate_control_rate_init(sta, local);
3567
3568         return sta; /* caller will call sta_info_put() */
3569 }
3570
3571
3572 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3573 {
3574         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3575         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3576
3577         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3578                dev->name, reason);
3579
3580         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3581             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3582                 return -EINVAL;
3583
3584         ieee80211_send_deauth(dev, ifsta, reason);
3585         ieee80211_set_disassoc(dev, ifsta, 1);
3586         return 0;
3587 }
3588
3589
3590 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3591 {
3592         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3593         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3594
3595         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3596                dev->name, reason);
3597
3598         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3599                 return -EINVAL;
3600
3601         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3602                 return -1;
3603
3604         ieee80211_send_disassoc(dev, ifsta, reason);
3605         ieee80211_set_disassoc(dev, ifsta, 0);
3606         return 0;
3607 }