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

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