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