net/mac80211/ieee80211_sta.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/iw_handler.h>
  29 #include <asm/types.h>
  30
  31 #include <net/mac80211.h>
  32 #include "ieee80211_i.h"
  33 #include "ieee80211_rate.h"
  34 #include "ieee80211_led.h"
  35 #include "mesh.h"
  36
  37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  38 #define IEEE80211_AUTH_MAX_TRIES 3
  39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  40 #define IEEE80211_ASSOC_MAX_TRIES 3
  41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
  43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  48
  49 #define IEEE80211_PROBE_DELAY (HZ / 33)
  50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
  56
  57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  58
  59
  60 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  61
  62 #define ERP_INFO_USE_PROTECTION BIT(1)
  63
  64 /* mgmt header + 1 byte action code */
  65 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  66
  67 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  68 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  69 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  70 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
  71 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
  72
  73 /* next values represent the buffer size for A-MPDU frame.
  74  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  75 #define IEEE80211_MIN_AMPDU_BUF 0x8
  76 #define IEEE80211_MAX_AMPDU_BUF 0x40
  77
  78 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  79                                      u8 *ssid, size_t ssid_len);
  80 static struct ieee80211_sta_bss *
  81 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
  82                      u8 *ssid, u8 ssid_len);
  83 static void ieee80211_rx_bss_put(struct net_device *dev,
  84                                  struct ieee80211_sta_bss *bss);
  85 static int ieee80211_sta_find_ibss(struct net_device *dev,
  86                                    struct ieee80211_if_sta *ifsta);
  87 static int ieee80211_sta_wep_configured(struct net_device *dev);
  88 static int ieee80211_sta_start_scan(struct net_device *dev,
  89                                     u8 *ssid, size_t ssid_len);
  90 static int ieee80211_sta_config_auth(struct net_device *dev,
  91                                      struct ieee80211_if_sta *ifsta);
  92
  93
  94 void ieee802_11_parse_elems(u8 *start, size_t len,
  95                             struct ieee802_11_elems *elems)
  96 {
  97         size_t left = len;
  98         u8 *pos = start;
  99
 100         memset(elems, 0, sizeof(*elems));
 101
 102         while (left >= 2) {
 103                 u8 id, elen;
 104
 105                 id = *pos++;
 106                 elen = *pos++;
 107                 left -= 2;
 108
 109                 if (elen > left)
 110                         return;
 111
 112                 switch (id) {
 113                 case WLAN_EID_SSID:
 114                         elems->ssid = pos;
 115                         elems->ssid_len = elen;
 116                         break;
 117                 case WLAN_EID_SUPP_RATES:
 118                         elems->supp_rates = pos;
 119                         elems->supp_rates_len = elen;
 120                         break;
 121                 case WLAN_EID_FH_PARAMS:
 122                         elems->fh_params = pos;
 123                         elems->fh_params_len = elen;
 124                         break;
 125                 case WLAN_EID_DS_PARAMS:
 126                         elems->ds_params = pos;
 127                         elems->ds_params_len = elen;
 128                         break;
 129                 case WLAN_EID_CF_PARAMS:
 130                         elems->cf_params = pos;
 131                         elems->cf_params_len = elen;
 132                         break;
 133                 case WLAN_EID_TIM:
 134                         elems->tim = pos;
 135                         elems->tim_len = elen;
 136                         break;
 137                 case WLAN_EID_IBSS_PARAMS:
 138                         elems->ibss_params = pos;
 139                         elems->ibss_params_len = elen;
 140                         break;
 141                 case WLAN_EID_CHALLENGE:
 142                         elems->challenge = pos;
 143                         elems->challenge_len = elen;
 144                         break;
 145                 case WLAN_EID_WPA:
 146                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 147                             pos[2] == 0xf2) {
 148                                 /* Microsoft OUI (00:50:F2) */
 149                                 if (pos[3] == 1) {
 150                                         /* OUI Type 1 - WPA IE */
 151                                         elems->wpa = pos;
 152                                         elems->wpa_len = elen;
 153                                 } else if (elen >= 5 && pos[3] == 2) {
 154                                         if (pos[4] == 0) {
 155                                                 elems->wmm_info = pos;
 156                                                 elems->wmm_info_len = elen;
 157                                         } else if (pos[4] == 1) {
 158                                                 elems->wmm_param = pos;
 159                                                 elems->wmm_param_len = elen;
 160                                         }
 161                                 }
 162                         }
 163                         break;
 164                 case WLAN_EID_RSN:
 165                         elems->rsn = pos;
 166                         elems->rsn_len = elen;
 167                         break;
 168                 case WLAN_EID_ERP_INFO:
 169                         elems->erp_info = pos;
 170                         elems->erp_info_len = elen;
 171                         break;
 172                 case WLAN_EID_EXT_SUPP_RATES:
 173                         elems->ext_supp_rates = pos;
 174                         elems->ext_supp_rates_len = elen;
 175                         break;
 176                 case WLAN_EID_HT_CAPABILITY:
 177                         elems->ht_cap_elem = pos;
 178                         elems->ht_cap_elem_len = elen;
 179                         break;
 180                 case WLAN_EID_HT_EXTRA_INFO:
 181                         elems->ht_info_elem = pos;
 182                         elems->ht_info_elem_len = elen;
 183                         break;
 184                 case WLAN_EID_MESH_ID:
 185                         elems->mesh_id = pos;
 186                         elems->mesh_id_len = elen;
 187                         break;
 188                 case WLAN_EID_MESH_CONFIG:
 189                         elems->mesh_config = pos;
 190                         elems->mesh_config_len = elen;
 191                         break;
 192                 case WLAN_EID_PEER_LINK:
 193                         elems->peer_link = pos;
 194                         elems->peer_link_len = elen;
 195                         break;
 196                 case WLAN_EID_PREQ:
 197                         elems->preq = pos;
 198                         elems->preq_len = elen;
 199                         break;
 200                 case WLAN_EID_PREP:
 201                         elems->prep = pos;
 202                         elems->prep_len = elen;
 203                         break;
 204                 case WLAN_EID_PERR:
 205                         elems->perr = pos;
 206                         elems->perr_len = elen;
 207                         break;
 208                 default:
 209                         break;
 210                 }
 211
 212                 left -= elen;
 213                 pos += elen;
 214         }
 215 }
 216
 217
 218 static int ecw2cw(int ecw)
 219 {
 220         return (1 << ecw) - 1;
 221 }
 222
 223
 224 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 225                                          struct ieee80211_sta_bss *bss,
 226                                          int ibss)
 227 {
 228         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 229         struct ieee80211_local *local = sdata->local;
 230         int i, have_higher_than_11mbit = 0;
 231
 232
 233         /* cf. IEEE 802.11 9.2.12 */
 234         for (i = 0; i < bss->supp_rates_len; i++)
 235                 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
 236                         have_higher_than_11mbit = 1;
 237
 238         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 239             have_higher_than_11mbit)
 240                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
 241         else
 242                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 243
 244
 245         if (local->ops->conf_tx) {
 246                 struct ieee80211_tx_queue_params qparam;
 247
 248                 memset(&qparam, 0, sizeof(qparam));
 249
 250                 qparam.aifs = 2;
 251
 252                 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
 253                     !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
 254                         qparam.cw_min = 31;
 255                 else
 256                         qparam.cw_min = 15;
 257
 258                 qparam.cw_max = 1023;
 259                 qparam.txop = 0;
 260
 261                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
 262                         local->ops->conf_tx(local_to_hw(local),
 263                                            i + IEEE80211_TX_QUEUE_DATA0,
 264                                            &qparam);
 265
 266                 if (ibss) {
 267                         /* IBSS uses different parameters for Beacon sending */
 268                         qparam.cw_min++;
 269                         qparam.cw_min *= 2;
 270                         qparam.cw_min--;
 271                         local->ops->conf_tx(local_to_hw(local),
 272                                            IEEE80211_TX_QUEUE_BEACON, &qparam);
 273                 }
 274         }
 275 }
 276
 277 static void ieee80211_sta_wmm_params(struct net_device *dev,
 278                                      struct ieee80211_if_sta *ifsta,
 279                                      u8 *wmm_param, size_t wmm_param_len)
 280 {
 281         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 282         struct ieee80211_tx_queue_params params;
 283         size_t left;
 284         int count;
 285         u8 *pos;
 286
 287         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 288                 return;
 289         count = wmm_param[6] & 0x0f;
 290         if (count == ifsta->wmm_last_param_set)
 291                 return;
 292         ifsta->wmm_last_param_set = count;
 293
 294         pos = wmm_param + 8;
 295         left = wmm_param_len - 8;
 296
 297         memset(&params, 0, sizeof(params));
 298
 299         if (!local->ops->conf_tx)
 300                 return;
 301
 302         local->wmm_acm = 0;
 303         for (; left >= 4; left -= 4, pos += 4) {
 304                 int aci = (pos[0] >> 5) & 0x03;
 305                 int acm = (pos[0] >> 4) & 0x01;
 306                 int queue;
 307
 308                 switch (aci) {
 309                 case 1:
 310                         queue = IEEE80211_TX_QUEUE_DATA3;
 311                         if (acm) {
 312                                 local->wmm_acm |= BIT(0) | BIT(3);
 313                         }
 314                         break;
 315                 case 2:
 316                         queue = IEEE80211_TX_QUEUE_DATA1;
 317                         if (acm) {
 318                                 local->wmm_acm |= BIT(4) | BIT(5);
 319                         }
 320                         break;
 321                 case 3:
 322                         queue = IEEE80211_TX_QUEUE_DATA0;
 323                         if (acm) {
 324                                 local->wmm_acm |= BIT(6) | BIT(7);
 325                         }
 326                         break;
 327                 case 0:
 328                 default:
 329                         queue = IEEE80211_TX_QUEUE_DATA2;
 330                         if (acm) {
 331                                 local->wmm_acm |= BIT(1) | BIT(2);
 332                         }
 333                         break;
 334                 }
 335
 336                 params.aifs = pos[0] & 0x0f;
 337                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 338                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 339                 params.txop = pos[2] | (pos[3] << 8);
 340 #ifdef CONFIG_MAC80211_DEBUG
 341                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 342                        "cWmin=%d cWmax=%d txop=%d\n",
 343                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 344                        params.cw_max, params.txop);
 345 #endif
 346                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 347                  * AC for now) */
 348                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 349                         printk(KERN_DEBUG "%s: failed to set TX queue "
 350                                "parameters for queue %d\n", dev->name, queue);
 351                 }
 352         }
 353 }
 354
 355
 356 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
 357                                    u8 erp_value)
 358 {
 359         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
 360         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 361         bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 362         bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 363         DECLARE_MAC_BUF(mac);
 364         u32 changed = 0;
 365
 366         if (use_protection != bss_conf->use_cts_prot) {
 367                 if (net_ratelimit()) {
 368                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 369                                "%s)\n",
 370                                sdata->dev->name,
 371                                use_protection ? "enabled" : "disabled",
 372                                print_mac(mac, ifsta->bssid));
 373                 }
 374                 bss_conf->use_cts_prot = use_protection;
 375                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 376         }
 377
 378         if (preamble_mode != bss_conf->use_short_preamble) {
 379                 if (net_ratelimit()) {
 380                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 381                                " (BSSID=%s)\n",
 382                                sdata->dev->name,
 383                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 384                                         "short" : "long",
 385                                print_mac(mac, ifsta->bssid));
 386                 }
 387                 bss_conf->use_short_preamble = preamble_mode;
 388                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 389         }
 390
 391         return changed;
 392 }
 393
 394 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 395                                    struct ieee80211_ht_info *ht_info)
 396 {
 397
 398         if (ht_info == NULL)
 399                 return -EINVAL;
 400
 401         memset(ht_info, 0, sizeof(*ht_info));
 402
 403         if (ht_cap_ie) {
 404                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 405
 406                 ht_info->ht_supported = 1;
 407                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 408                 ht_info->ampdu_factor =
 409                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 410                 ht_info->ampdu_density =
 411                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 412                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 413         } else
 414                 ht_info->ht_supported = 0;
 415
 416         return 0;
 417 }
 418
 419 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 420                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 421                         struct ieee80211_ht_bss_info *bss_info)
 422 {
 423         if (bss_info == NULL)
 424                 return -EINVAL;
 425
 426         memset(bss_info, 0, sizeof(*bss_info));
 427
 428         if (ht_add_info_ie) {
 429                 u16 op_mode;
 430                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 431
 432                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 433                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 434                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 435         }
 436
 437         return 0;
 438 }
 439
 440 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 441                                          struct ieee80211_if_sta *ifsta)
 442 {
 443         char *buf;
 444         size_t len;
 445         int i;
 446         union iwreq_data wrqu;
 447
 448         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 449                 return;
 450
 451         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 452                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 453         if (!buf)
 454                 return;
 455
 456         len = sprintf(buf, "ASSOCINFO(");
 457         if (ifsta->assocreq_ies) {
 458                 len += sprintf(buf + len, "ReqIEs=");
 459                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 460                         len += sprintf(buf + len, "%02x",
 461                                        ifsta->assocreq_ies[i]);
 462                 }
 463         }
 464         if (ifsta->assocresp_ies) {
 465                 if (ifsta->assocreq_ies)
 466                         len += sprintf(buf + len, " ");
 467                 len += sprintf(buf + len, "RespIEs=");
 468                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 469                         len += sprintf(buf + len, "%02x",
 470                                        ifsta->assocresp_ies[i]);
 471                 }
 472         }
 473         len += sprintf(buf + len, ")");
 474
 475         if (len > IW_CUSTOM_MAX) {
 476                 len = sprintf(buf, "ASSOCRESPIE=");
 477                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 478                         len += sprintf(buf + len, "%02x",
 479                                        ifsta->assocresp_ies[i]);
 480                 }
 481         }
 482
 483         memset(&wrqu, 0, sizeof(wrqu));
 484         wrqu.data.length = len;
 485         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 486
 487         kfree(buf);
 488 }
 489
 490
 491 static void ieee80211_set_associated(struct net_device *dev,
 492                                      struct ieee80211_if_sta *ifsta,
 493                                      bool assoc)
 494 {
 495         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 496         struct ieee80211_local *local = sdata->local;
 497         union iwreq_data wrqu;
 498         u32 changed = BSS_CHANGED_ASSOC;
 499
 500         if (assoc) {
 501                 struct ieee80211_sta_bss *bss;
 502
 503                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 504
 505                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 506                         return;
 507
 508                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 509                                            local->hw.conf.channel->center_freq,
 510                                            ifsta->ssid, ifsta->ssid_len);
 511                 if (bss) {
 512                         if (bss->has_erp_value)
 513                                 changed |= ieee80211_handle_erp_ie(
 514                                                 sdata, bss->erp_value);
 515                         ieee80211_rx_bss_put(dev, bss);
 516                 }
 517
 518                 netif_carrier_on(dev);
 519                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 520                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 521                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 522                 ieee80211_sta_send_associnfo(dev, ifsta);
 523         } else {
 524                 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
 525                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 526                 netif_carrier_off(dev);
 527                 ieee80211_reset_erp_info(dev);
 528                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 529         }
 530         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 531         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 532         ifsta->last_probe = jiffies;
 533         ieee80211_led_assoc(local, assoc);
 534
 535         sdata->bss_conf.assoc = assoc;
 536         ieee80211_bss_info_change_notify(sdata, changed);
 537 }
 538
 539 static void ieee80211_set_disassoc(struct net_device *dev,
 540                                    struct ieee80211_if_sta *ifsta, int deauth)
 541 {
 542         if (deauth)
 543                 ifsta->auth_tries = 0;
 544         ifsta->assoc_tries = 0;
 545         ieee80211_set_associated(dev, ifsta, 0);
 546 }
 547
 548 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 549                       int encrypt)
 550 {
 551         struct ieee80211_sub_if_data *sdata;
 552         struct ieee80211_tx_packet_data *pkt_data;
 553
 554         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 555         skb->dev = sdata->local->mdev;
 556         skb_set_mac_header(skb, 0);
 557         skb_set_network_header(skb, 0);
 558         skb_set_transport_header(skb, 0);
 559
 560         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 561         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 562         pkt_data->ifindex = sdata->dev->ifindex;
 563         if (!encrypt)
 564                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 565
 566         dev_queue_xmit(skb);
 567 }
 568
 569
 570 static void ieee80211_send_auth(struct net_device *dev,
 571                                 struct ieee80211_if_sta *ifsta,
 572                                 int transaction, u8 *extra, size_t extra_len,
 573                                 int encrypt)
 574 {
 575         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 576         struct sk_buff *skb;
 577         struct ieee80211_mgmt *mgmt;
 578
 579         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 580                             sizeof(*mgmt) + 6 + extra_len);
 581         if (!skb) {
 582                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 583                        "frame\n", dev->name);
 584                 return;
 585         }
 586         skb_reserve(skb, local->hw.extra_tx_headroom);
 587
 588         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 589         memset(mgmt, 0, 24 + 6);
 590         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 591                                            IEEE80211_STYPE_AUTH);
 592         if (encrypt)
 593                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 594         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 595         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 596         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 597         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 598         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 599         ifsta->auth_transaction = transaction + 1;
 600         mgmt->u.auth.status_code = cpu_to_le16(0);
 601         if (extra)
 602                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 603
 604         ieee80211_sta_tx(dev, skb, encrypt);
 605 }
 606
 607
 608 static void ieee80211_authenticate(struct net_device *dev,
 609                                    struct ieee80211_if_sta *ifsta)
 610 {
 611         DECLARE_MAC_BUF(mac);
 612
 613         ifsta->auth_tries++;
 614         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 615                 printk(KERN_DEBUG "%s: authentication with AP %s"
 616                        " timed out\n",
 617                        dev->name, print_mac(mac, ifsta->bssid));
 618                 ifsta->state = IEEE80211_DISABLED;
 619                 return;
 620         }
 621
 622         ifsta->state = IEEE80211_AUTHENTICATE;
 623         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 624                dev->name, print_mac(mac, ifsta->bssid));
 625
 626         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 627
 628         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 629 }
 630
 631
 632 static void ieee80211_send_assoc(struct net_device *dev,
 633                                  struct ieee80211_if_sta *ifsta)
 634 {
 635         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 636         struct sk_buff *skb;
 637         struct ieee80211_mgmt *mgmt;
 638         u8 *pos, *ies;
 639         int i, len;
 640         u16 capab;
 641         struct ieee80211_sta_bss *bss;
 642         int wmm = 0;
 643         struct ieee80211_supported_band *sband;
 644
 645         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 646                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 647                             ifsta->ssid_len);
 648         if (!skb) {
 649                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 650                        "frame\n", dev->name);
 651                 return;
 652         }
 653         skb_reserve(skb, local->hw.extra_tx_headroom);
 654
 655         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 656
 657         capab = ifsta->capab;
 658
 659         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
 660                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 661                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 662                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 663                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 664         }
 665
 666         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 667                                    local->hw.conf.channel->center_freq,
 668                                    ifsta->ssid, ifsta->ssid_len);
 669         if (bss) {
 670                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 671                         capab |= WLAN_CAPABILITY_PRIVACY;
 672                 if (bss->wmm_ie) {
 673                         wmm = 1;
 674                 }
 675                 ieee80211_rx_bss_put(dev, bss);
 676         }
 677
 678         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 679         memset(mgmt, 0, 24);
 680         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 681         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 682         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 683
 684         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 685                 skb_put(skb, 10);
 686                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 687                                                    IEEE80211_STYPE_REASSOC_REQ);
 688                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 689                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 690                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 691                        ETH_ALEN);
 692         } else {
 693                 skb_put(skb, 4);
 694                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 695                                                    IEEE80211_STYPE_ASSOC_REQ);
 696                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 697                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 698         }
 699
 700         /* SSID */
 701         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 702         *pos++ = WLAN_EID_SSID;
 703         *pos++ = ifsta->ssid_len;
 704         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 705
 706         len = sband->n_bitrates;
 707         if (len > 8)
 708                 len = 8;
 709         pos = skb_put(skb, len + 2);
 710         *pos++ = WLAN_EID_SUPP_RATES;
 711         *pos++ = len;
 712         for (i = 0; i < len; i++) {
 713                 int rate = sband->bitrates[i].bitrate;
 714                 *pos++ = (u8) (rate / 5);
 715         }
 716
 717         if (sband->n_bitrates > len) {
 718                 pos = skb_put(skb, sband->n_bitrates - len + 2);
 719                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 720                 *pos++ = sband->n_bitrates - len;
 721                 for (i = len; i < sband->n_bitrates; i++) {
 722                         int rate = sband->bitrates[i].bitrate;
 723                         *pos++ = (u8) (rate / 5);
 724                 }
 725         }
 726
 727         if (ifsta->extra_ie) {
 728                 pos = skb_put(skb, ifsta->extra_ie_len);
 729                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 730         }
 731
 732         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 733                 pos = skb_put(skb, 9);
 734                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 735                 *pos++ = 7; /* len */
 736                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 737                 *pos++ = 0x50;
 738                 *pos++ = 0xf2;
 739                 *pos++ = 2; /* WME */
 740                 *pos++ = 0; /* WME info */
 741                 *pos++ = 1; /* WME ver */
 742                 *pos++ = 0;
 743         }
 744         /* wmm support is a must to HT */
 745         if (wmm && sband->ht_info.ht_supported) {
 746                 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
 747                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 748                 *pos++ = WLAN_EID_HT_CAPABILITY;
 749                 *pos++ = sizeof(struct ieee80211_ht_cap);
 750                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 751                 memcpy(pos, &tmp, sizeof(u16));
 752                 pos += sizeof(u16);
 753                 /* TODO: needs a define here for << 2 */
 754                 *pos++ = sband->ht_info.ampdu_factor |
 755                          (sband->ht_info.ampdu_density << 2);
 756                 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
 757         }
 758
 759         kfree(ifsta->assocreq_ies);
 760         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 761         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 762         if (ifsta->assocreq_ies)
 763                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 764
 765         ieee80211_sta_tx(dev, skb, 0);
 766 }
 767
 768
 769 static void ieee80211_send_deauth(struct net_device *dev,
 770                                   struct ieee80211_if_sta *ifsta, u16 reason)
 771 {
 772         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 773         struct sk_buff *skb;
 774         struct ieee80211_mgmt *mgmt;
 775
 776         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 777         if (!skb) {
 778                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 779                        "frame\n", dev->name);
 780                 return;
 781         }
 782         skb_reserve(skb, local->hw.extra_tx_headroom);
 783
 784         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 785         memset(mgmt, 0, 24);
 786         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 787         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 788         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 789         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 790                                            IEEE80211_STYPE_DEAUTH);
 791         skb_put(skb, 2);
 792         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 793
 794         ieee80211_sta_tx(dev, skb, 0);
 795 }
 796
 797
 798 static void ieee80211_send_disassoc(struct net_device *dev,
 799                                     struct ieee80211_if_sta *ifsta, u16 reason)
 800 {
 801         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 802         struct sk_buff *skb;
 803         struct ieee80211_mgmt *mgmt;
 804
 805         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 806         if (!skb) {
 807                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 808                        "frame\n", dev->name);
 809                 return;
 810         }
 811         skb_reserve(skb, local->hw.extra_tx_headroom);
 812
 813         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 814         memset(mgmt, 0, 24);
 815         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 816         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 817         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 818         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 819                                            IEEE80211_STYPE_DISASSOC);
 820         skb_put(skb, 2);
 821         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 822
 823         ieee80211_sta_tx(dev, skb, 0);
 824 }
 825
 826
 827 static int ieee80211_privacy_mismatch(struct net_device *dev,
 828                                       struct ieee80211_if_sta *ifsta)
 829 {
 830         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 831         struct ieee80211_sta_bss *bss;
 832         int bss_privacy;
 833         int wep_privacy;
 834         int privacy_invoked;
 835
 836         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 837                 return 0;
 838
 839         bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 840                                    local->hw.conf.channel->center_freq,
 841                                    ifsta->ssid, ifsta->ssid_len);
 842         if (!bss)
 843                 return 0;
 844
 845         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 846         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 847         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 848
 849         ieee80211_rx_bss_put(dev, bss);
 850
 851         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 852                 return 0;
 853
 854         return 1;
 855 }
 856
 857
 858 static void ieee80211_associate(struct net_device *dev,
 859                                 struct ieee80211_if_sta *ifsta)
 860 {
 861         DECLARE_MAC_BUF(mac);
 862
 863         ifsta->assoc_tries++;
 864         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 865                 printk(KERN_DEBUG "%s: association with AP %s"
 866                        " timed out\n",
 867                        dev->name, print_mac(mac, ifsta->bssid));
 868                 ifsta->state = IEEE80211_DISABLED;
 869                 return;
 870         }
 871
 872         ifsta->state = IEEE80211_ASSOCIATE;
 873         printk(KERN_DEBUG "%s: associate with AP %s\n",
 874                dev->name, print_mac(mac, ifsta->bssid));
 875         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 876                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 877                        "mixed-cell disabled - abort association\n", dev->name);
 878                 ifsta->state = IEEE80211_DISABLED;
 879                 return;
 880         }
 881
 882         ieee80211_send_assoc(dev, ifsta);
 883
 884         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 885 }
 886
 887
 888 static void ieee80211_associated(struct net_device *dev,
 889                                  struct ieee80211_if_sta *ifsta)
 890 {
 891         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 892         struct sta_info *sta;
 893         int disassoc;
 894         DECLARE_MAC_BUF(mac);
 895
 896         /* TODO: start monitoring current AP signal quality and number of
 897          * missed beacons. Scan other channels every now and then and search
 898          * for better APs. */
 899         /* TODO: remove expired BSSes */
 900
 901         ifsta->state = IEEE80211_ASSOCIATED;
 902
 903         rcu_read_lock();
 904
 905         sta = sta_info_get(local, ifsta->bssid);
 906         if (!sta) {
 907                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 908                        dev->name, print_mac(mac, ifsta->bssid));
 909                 disassoc = 1;
 910         } else {
 911                 disassoc = 0;
 912                 if (time_after(jiffies,
 913                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 914                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 915                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 916                                        "current AP %s - assume out of "
 917                                        "range\n",
 918                                        dev->name, print_mac(mac, ifsta->bssid));
 919                                 disassoc = 1;
 920                                 sta_info_unlink(&sta);
 921                         } else
 922                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 923                                                          local->scan_ssid,
 924                                                          local->scan_ssid_len);
 925                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 926                 } else {
 927                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 928                         if (time_after(jiffies, ifsta->last_probe +
 929                                        IEEE80211_PROBE_INTERVAL)) {
 930                                 ifsta->last_probe = jiffies;
 931                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 932                                                          ifsta->ssid,
 933                                                          ifsta->ssid_len);
 934                         }
 935                 }
 936         }
 937
 938         rcu_read_unlock();
 939
 940         if (disassoc && sta) {
 941                 rtnl_lock();
 942                 sta_info_destroy(sta);
 943                 rtnl_unlock();
 944         }
 945
 946         if (disassoc) {
 947                 ifsta->state = IEEE80211_DISABLED;
 948                 ieee80211_set_associated(dev, ifsta, 0);
 949         } else {
 950                 mod_timer(&ifsta->timer, jiffies +
 951                                       IEEE80211_MONITORING_INTERVAL);
 952         }
 953 }
 954
 955
 956 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 957                                      u8 *ssid, size_t ssid_len)
 958 {
 959         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 960         struct ieee80211_supported_band *sband;
 961         struct sk_buff *skb;
 962         struct ieee80211_mgmt *mgmt;
 963         u8 *pos, *supp_rates, *esupp_rates = NULL;
 964         int i;
 965
 966         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 967         if (!skb) {
 968                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 969                        "request\n", dev->name);
 970                 return;
 971         }
 972         skb_reserve(skb, local->hw.extra_tx_headroom);
 973
 974         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 975         memset(mgmt, 0, 24);
 976         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 977                                            IEEE80211_STYPE_PROBE_REQ);
 978         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 979         if (dst) {
 980                 memcpy(mgmt->da, dst, ETH_ALEN);
 981                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 982         } else {
 983                 memset(mgmt->da, 0xff, ETH_ALEN);
 984                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 985         }
 986         pos = skb_put(skb, 2 + ssid_len);
 987         *pos++ = WLAN_EID_SSID;
 988         *pos++ = ssid_len;
 989         memcpy(pos, ssid, ssid_len);
 990
 991         supp_rates = skb_put(skb, 2);
 992         supp_rates[0] = WLAN_EID_SUPP_RATES;
 993         supp_rates[1] = 0;
 994         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 995
 996         for (i = 0; i < sband->n_bitrates; i++) {
 997                 struct ieee80211_rate *rate = &sband->bitrates[i];
 998                 if (esupp_rates) {
 999                         pos = skb_put(skb, 1);
1000                         esupp_rates[1]++;
1001                 } else if (supp_rates[1] == 8) {
1002                         esupp_rates = skb_put(skb, 3);
1003                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1004                         esupp_rates[1] = 1;
1005                         pos = &esupp_rates[2];
1006                 } else {
1007                         pos = skb_put(skb, 1);
1008                         supp_rates[1]++;
1009                 }
1010                 *pos = rate->bitrate / 5;
1011         }
1012
1013         ieee80211_sta_tx(dev, skb, 0);
1014 }
1015
1016
1017 static int ieee80211_sta_wep_configured(struct net_device *dev)
1018 {
1019         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1020         if (!sdata || !sdata->default_key ||
1021             sdata->default_key->conf.alg != ALG_WEP)
1022                 return 0;
1023         return 1;
1024 }
1025
1026
1027 static void ieee80211_auth_completed(struct net_device *dev,
1028                                      struct ieee80211_if_sta *ifsta)
1029 {
1030         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1031         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1032         ieee80211_associate(dev, ifsta);
1033 }
1034
1035
1036 static void ieee80211_auth_challenge(struct net_device *dev,
1037                                      struct ieee80211_if_sta *ifsta,
1038                                      struct ieee80211_mgmt *mgmt,
1039                                      size_t len)
1040 {
1041         u8 *pos;
1042         struct ieee802_11_elems elems;
1043
1044         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1045         pos = mgmt->u.auth.variable;
1046         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1047         if (!elems.challenge) {
1048                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1049                        "frame\n", dev->name);
1050                 return;
1051         }
1052         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1053                             elems.challenge_len + 2, 1);
1054 }
1055
1056 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1057                                         u8 dialog_token, u16 status, u16 policy,
1058                                         u16 buf_size, u16 timeout)
1059 {
1060         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1061         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1062         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1063         struct sk_buff *skb;
1064         struct ieee80211_mgmt *mgmt;
1065         u16 capab;
1066
1067         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1068                                         sizeof(mgmt->u.action.u.addba_resp));
1069         if (!skb) {
1070                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1071                        "for addba resp frame\n", dev->name);
1072                 return;
1073         }
1074
1075         skb_reserve(skb, local->hw.extra_tx_headroom);
1076         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1077         memset(mgmt, 0, 24);
1078         memcpy(mgmt->da, da, ETH_ALEN);
1079         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1080         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1081                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1082         else
1083                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1084         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1085                                            IEEE80211_STYPE_ACTION);
1086
1087         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1088         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1089         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1090         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1091
1092         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1093         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1094         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1095
1096         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1097         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1098         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1099
1100         ieee80211_sta_tx(dev, skb, 0);
1101
1102         return;
1103 }
1104
1105 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1106                                 u16 tid, u8 dialog_token, u16 start_seq_num,
1107                                 u16 agg_size, u16 timeout)
1108 {
1109         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1110         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1111         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1112         struct sk_buff *skb;
1113         struct ieee80211_mgmt *mgmt;
1114         u16 capab;
1115
1116         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1117                                 sizeof(mgmt->u.action.u.addba_req));
1118
1119
1120         if (!skb) {
1121                 printk(KERN_ERR "%s: failed to allocate buffer "
1122                                 "for addba request frame\n", dev->name);
1123                 return;
1124         }
1125         skb_reserve(skb, local->hw.extra_tx_headroom);
1126         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1127         memset(mgmt, 0, 24);
1128         memcpy(mgmt->da, da, ETH_ALEN);
1129         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1130         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1131                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1132         else
1133                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1134
1135         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1136                                         IEEE80211_STYPE_ACTION);
1137
1138         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1139
1140         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1141         mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1142
1143         mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1144         capab = (u16)(1 << 1);          /* bit 1 aggregation policy */
1145         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1146         capab |= (u16)(agg_size << 6);  /* bit 15:6 max size of aggergation */
1147
1148         mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1149
1150         mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1151         mgmt->u.action.u.addba_req.start_seq_num =
1152                                         cpu_to_le16(start_seq_num << 4);
1153
1154         ieee80211_sta_tx(dev, skb, 0);
1155 }
1156
1157 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1158                                                 struct ieee80211_mgmt *mgmt,
1159                                                 size_t len)
1160 {
1161         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1162         struct ieee80211_hw *hw = &local->hw;
1163         struct ieee80211_conf *conf = &hw->conf;
1164         struct sta_info *sta;
1165         struct tid_ampdu_rx *tid_agg_rx;
1166         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1167         u8 dialog_token;
1168         int ret = -EOPNOTSUPP;
1169         DECLARE_MAC_BUF(mac);
1170
1171         rcu_read_lock();
1172
1173         sta = sta_info_get(local, mgmt->sa);
1174         if (!sta) {
1175                 rcu_read_unlock();
1176                 return;
1177         }
1178
1179         /* extract session parameters from addba request frame */
1180         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1181         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1182         start_seq_num =
1183                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1184
1185         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1186         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1187         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1188         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1189
1190         status = WLAN_STATUS_REQUEST_DECLINED;
1191
1192         /* sanity check for incoming parameters:
1193          * check if configuration can support the BA policy
1194          * and if buffer size does not exceeds max value */
1195         if (((ba_policy != 1)
1196                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1197                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1198                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1199 #ifdef CONFIG_MAC80211_HT_DEBUG
1200                 if (net_ratelimit())
1201                         printk(KERN_DEBUG "AddBA Req with bad params from "
1202                                 "%s on tid %u. policy %d, buffer size %d\n",
1203                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1204                                 buf_size);
1205 #endif /* CONFIG_MAC80211_HT_DEBUG */
1206                 goto end_no_lock;
1207         }
1208         /* determine default buffer size */
1209         if (buf_size == 0) {
1210                 struct ieee80211_supported_band *sband;
1211
1212                 sband = local->hw.wiphy->bands[conf->channel->band];
1213                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1214                 buf_size = buf_size << sband->ht_info.ampdu_factor;
1215         }
1216
1217
1218         /* examine state machine */
1219         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1220
1221         if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1222 #ifdef CONFIG_MAC80211_HT_DEBUG
1223                 if (net_ratelimit())
1224                         printk(KERN_DEBUG "unexpected AddBA Req from "
1225                                 "%s on tid %u\n",
1226                                 print_mac(mac, mgmt->sa), tid);
1227 #endif /* CONFIG_MAC80211_HT_DEBUG */
1228                 goto end;
1229         }
1230
1231         /* prepare A-MPDU MLME for Rx aggregation */
1232         sta->ampdu_mlme.tid_rx[tid] =
1233                         kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1234         if (!sta->ampdu_mlme.tid_rx[tid]) {
1235                 if (net_ratelimit())
1236                         printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1237                                         tid);
1238                 goto end;
1239         }
1240         /* rx timer */
1241         sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1242                                 sta_rx_agg_session_timer_expired;
1243         sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1244                                 (unsigned long)&sta->timer_to_tid[tid];
1245         init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1246
1247         tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1248
1249         /* prepare reordering buffer */
1250         tid_agg_rx->reorder_buf =
1251                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1252         if (!tid_agg_rx->reorder_buf) {
1253                 if (net_ratelimit())
1254                         printk(KERN_ERR "can not allocate reordering buffer "
1255                                "to tid %d\n", tid);
1256                 kfree(sta->ampdu_mlme.tid_rx[tid]);
1257                 goto end;
1258         }
1259         memset(tid_agg_rx->reorder_buf, 0,
1260                 buf_size * sizeof(struct sk_buf *));
1261
1262         if (local->ops->ampdu_action)
1263                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1264                                                sta->addr, tid, &start_seq_num);
1265 #ifdef CONFIG_MAC80211_HT_DEBUG
1266         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1267 #endif /* CONFIG_MAC80211_HT_DEBUG */
1268
1269         if (ret) {
1270                 kfree(tid_agg_rx->reorder_buf);
1271                 kfree(tid_agg_rx);
1272                 sta->ampdu_mlme.tid_rx[tid] = NULL;
1273                 goto end;
1274         }
1275
1276         /* change state and send addba resp */
1277         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1278         tid_agg_rx->dialog_token = dialog_token;
1279         tid_agg_rx->ssn = start_seq_num;
1280         tid_agg_rx->head_seq_num = start_seq_num;
1281         tid_agg_rx->buf_size = buf_size;
1282         tid_agg_rx->timeout = timeout;
1283         tid_agg_rx->stored_mpdu_num = 0;
1284         status = WLAN_STATUS_SUCCESS;
1285 end:
1286         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1287
1288 end_no_lock:
1289         ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1290                                   dialog_token, status, 1, buf_size, timeout);
1291         rcu_read_unlock();
1292 }
1293
1294 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1295                                              struct ieee80211_mgmt *mgmt,
1296                                              size_t len)
1297 {
1298         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1299         struct ieee80211_hw *hw = &local->hw;
1300         struct sta_info *sta;
1301         u16 capab;
1302         u16 tid;
1303         u8 *state;
1304
1305         rcu_read_lock();
1306
1307         sta = sta_info_get(local, mgmt->sa);
1308         if (!sta) {
1309                 rcu_read_unlock();
1310                 return;
1311         }
1312
1313         capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1314         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1315
1316         state = &sta->ampdu_mlme.tid_state_tx[tid];
1317
1318         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1319
1320         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1321                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1322                 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1323                         "%d\n", *state);
1324                 goto addba_resp_exit;
1325         }
1326
1327         if (mgmt->u.action.u.addba_resp.dialog_token !=
1328                 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1329                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1330 #ifdef CONFIG_MAC80211_HT_DEBUG
1331                 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1332 #endif /* CONFIG_MAC80211_HT_DEBUG */
1333                 goto addba_resp_exit;
1334         }
1335
1336         del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1337 #ifdef CONFIG_MAC80211_HT_DEBUG
1338         printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1339 #endif /* CONFIG_MAC80211_HT_DEBUG */
1340         if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1341                         == WLAN_STATUS_SUCCESS) {
1342                 if (*state & HT_ADDBA_RECEIVED_MSK)
1343                         printk(KERN_DEBUG "double addBA response\n");
1344
1345                 *state |= HT_ADDBA_RECEIVED_MSK;
1346                 sta->ampdu_mlme.addba_req_num[tid] = 0;
1347
1348                 if (*state == HT_AGG_STATE_OPERATIONAL) {
1349                         printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1350                         ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1351                 }
1352
1353                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1354                 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1355         } else {
1356                 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1357
1358                 sta->ampdu_mlme.addba_req_num[tid]++;
1359                 /* this will allow the state check in stop_BA_session */
1360                 *state = HT_AGG_STATE_OPERATIONAL;
1361                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1362                 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1363                                              WLAN_BACK_INITIATOR);
1364         }
1365
1366 addba_resp_exit:
1367         rcu_read_unlock();
1368 }
1369
1370 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1371                           u16 initiator, u16 reason_code)
1372 {
1373         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1374         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1375         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1376         struct sk_buff *skb;
1377         struct ieee80211_mgmt *mgmt;
1378         u16 params;
1379
1380         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1381                                         sizeof(mgmt->u.action.u.delba));
1382
1383         if (!skb) {
1384                 printk(KERN_ERR "%s: failed to allocate buffer "
1385                                         "for delba frame\n", dev->name);
1386                 return;
1387         }
1388
1389         skb_reserve(skb, local->hw.extra_tx_headroom);
1390         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1391         memset(mgmt, 0, 24);
1392         memcpy(mgmt->da, da, ETH_ALEN);
1393         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1394         if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1395                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1396         else
1397                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1398         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1399                                         IEEE80211_STYPE_ACTION);
1400
1401         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1402
1403         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1404         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1405         params = (u16)(initiator << 11);        /* bit 11 initiator */
1406         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1407
1408         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1409         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1410
1411         ieee80211_sta_tx(dev, skb, 0);
1412 }
1413
1414 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1415                                         u16 initiator, u16 reason)
1416 {
1417         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1418         struct ieee80211_hw *hw = &local->hw;
1419         struct sta_info *sta;
1420         int ret, i;
1421
1422         rcu_read_lock();
1423
1424         sta = sta_info_get(local, ra);
1425         if (!sta) {
1426                 rcu_read_unlock();
1427                 return;
1428         }
1429
1430         /* check if TID is in operational state */
1431         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1432         if (sta->ampdu_mlme.tid_state_rx[tid]
1433                                 != HT_AGG_STATE_OPERATIONAL) {
1434                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1435                 rcu_read_unlock();
1436                 return;
1437         }
1438         sta->ampdu_mlme.tid_state_rx[tid] =
1439                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1440                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1441                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1442
1443         /* stop HW Rx aggregation. ampdu_action existence
1444          * already verified in session init so we add the BUG_ON */
1445         BUG_ON(!local->ops->ampdu_action);
1446
1447         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1448                                         ra, tid, NULL);
1449         if (ret)
1450                 printk(KERN_DEBUG "HW problem - can not stop rx "
1451                                 "aggergation for tid %d\n", tid);
1452
1453         /* shutdown timer has not expired */
1454         if (initiator != WLAN_BACK_TIMER)
1455                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1456
1457         /* check if this is a self generated aggregation halt */
1458         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1459                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1460
1461         /* free the reordering buffer */
1462         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1463                 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1464                         /* release the reordered frames */
1465                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1466                         sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1467                         sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1468                 }
1469         }
1470         /* free resources */
1471         kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1472         kfree(sta->ampdu_mlme.tid_rx[tid]);
1473         sta->ampdu_mlme.tid_rx[tid] = NULL;
1474         sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1475
1476         rcu_read_unlock();
1477 }
1478
1479
1480 static void ieee80211_sta_process_delba(struct net_device *dev,
1481                         struct ieee80211_mgmt *mgmt, size_t len)
1482 {
1483         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1484         struct sta_info *sta;
1485         u16 tid, params;
1486         u16 initiator;
1487         DECLARE_MAC_BUF(mac);
1488
1489         rcu_read_lock();
1490
1491         sta = sta_info_get(local, mgmt->sa);
1492         if (!sta) {
1493                 rcu_read_unlock();
1494                 return;
1495         }
1496
1497         params = le16_to_cpu(mgmt->u.action.u.delba.params);
1498         tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1499         initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1500
1501 #ifdef CONFIG_MAC80211_HT_DEBUG
1502         if (net_ratelimit())
1503                 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1504                         print_mac(mac, mgmt->sa),
1505                         initiator ? "initiator" : "recipient", tid,
1506                         mgmt->u.action.u.delba.reason_code);
1507 #endif /* CONFIG_MAC80211_HT_DEBUG */
1508
1509         if (initiator == WLAN_BACK_INITIATOR)
1510                 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1511                                                  WLAN_BACK_INITIATOR, 0);
1512         else { /* WLAN_BACK_RECIPIENT */
1513                 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1514                 sta->ampdu_mlme.tid_state_tx[tid] =
1515                                 HT_AGG_STATE_OPERATIONAL;
1516                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1517                 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1518                                              WLAN_BACK_RECIPIENT);
1519         }
1520         rcu_read_unlock();
1521 }
1522
1523 /*
1524  * After sending add Block Ack request we activated a timer until
1525  * add Block Ack response will arrive from the recipient.
1526  * If this timer expires sta_addba_resp_timer_expired will be executed.
1527  */
1528 void sta_addba_resp_timer_expired(unsigned long data)
1529 {
1530         /* not an elegant detour, but there is no choice as the timer passes
1531          * only one argument, and both sta_info and TID are needed, so init
1532          * flow in sta_info_create gives the TID as data, while the timer_to_id
1533          * array gives the sta through container_of */
1534         u16 tid = *(int *)data;
1535         struct sta_info *temp_sta = container_of((void *)data,
1536                 struct sta_info, timer_to_tid[tid]);
1537
1538         struct ieee80211_local *local = temp_sta->local;
1539         struct ieee80211_hw *hw = &local->hw;
1540         struct sta_info *sta;
1541         u8 *state;
1542
1543         rcu_read_lock();
1544
1545         sta = sta_info_get(local, temp_sta->addr);
1546         if (!sta) {
1547                 rcu_read_unlock();
1548                 return;
1549         }
1550
1551         state = &sta->ampdu_mlme.tid_state_tx[tid];
1552         /* check if the TID waits for addBA response */
1553         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1554         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1555                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1556                 *state = HT_AGG_STATE_IDLE;
1557                 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1558                                 "expecting addBA response there", tid);
1559                 goto timer_expired_exit;
1560         }
1561
1562         printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1563
1564         /* go through the state check in stop_BA_session */
1565         *state = HT_AGG_STATE_OPERATIONAL;
1566         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1567         ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1568                                      WLAN_BACK_INITIATOR);
1569
1570 timer_expired_exit:
1571         rcu_read_unlock();
1572 }
1573
1574 /*
1575  * After accepting the AddBA Request we activated a timer,
1576  * resetting it after each frame that arrives from the originator.
1577  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1578  */
1579 void sta_rx_agg_session_timer_expired(unsigned long data)
1580 {
1581         /* not an elegant detour, but there is no choice as the timer passes
1582          * only one argument, and verious sta_info are needed here, so init
1583          * flow in sta_info_create gives the TID as data, while the timer_to_id
1584          * array gives the sta through container_of */
1585         u8 *ptid = (u8 *)data;
1586         u8 *timer_to_id = ptid - *ptid;
1587         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1588                                          timer_to_tid[0]);
1589
1590         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1591         ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1592                                          (u16)*ptid, WLAN_BACK_TIMER,
1593                                          WLAN_REASON_QSTA_TIMEOUT);
1594 }
1595
1596 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1597 {
1598         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1599         int i;
1600
1601         for (i = 0; i <  STA_TID_NUM; i++) {
1602                 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1603                                              WLAN_BACK_INITIATOR);
1604                 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1605                                                  WLAN_BACK_RECIPIENT,
1606                                                  WLAN_REASON_QSTA_LEAVE_QBSS);
1607         }
1608 }
1609
1610 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1611                                    struct ieee80211_if_sta *ifsta,
1612                                    struct ieee80211_mgmt *mgmt,
1613                                    size_t len)
1614 {
1615         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1616         u16 auth_alg, auth_transaction, status_code;
1617         DECLARE_MAC_BUF(mac);
1618
1619         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1620             sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1621                 printk(KERN_DEBUG "%s: authentication frame received from "
1622                        "%s, but not in authenticate state - ignored\n",
1623                        dev->name, print_mac(mac, mgmt->sa));
1624                 return;
1625         }
1626
1627         if (len < 24 + 6) {
1628                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1629                        "received from %s - ignored\n",
1630                        dev->name, len, print_mac(mac, mgmt->sa));
1631                 return;
1632         }
1633
1634         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1635             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1636                 printk(KERN_DEBUG "%s: authentication frame received from "
1637                        "unknown AP (SA=%s BSSID=%s) - "
1638                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1639                        print_mac(mac, mgmt->bssid));
1640                 return;
1641         }
1642
1643         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1644             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1645                 printk(KERN_DEBUG "%s: authentication frame received from "
1646                        "unknown BSSID (SA=%s BSSID=%s) - "
1647                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1648                        print_mac(mac, mgmt->bssid));
1649                 return;
1650         }
1651
1652         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1653         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1654         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1655
1656         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1657                "transaction=%d status=%d)\n",
1658                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1659                auth_transaction, status_code);
1660
1661         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1662                 /* IEEE 802.11 standard does not require authentication in IBSS
1663                  * networks and most implementations do not seem to use it.
1664                  * However, try to reply to authentication attempts if someone
1665                  * has actually implemented this.
1666                  * TODO: Could implement shared key authentication. */
1667                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1668                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1669                                "frame (alg=%d transaction=%d)\n",
1670                                dev->name, auth_alg, auth_transaction);
1671                         return;
1672                 }
1673                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1674         }
1675
1676         if (auth_alg != ifsta->auth_alg ||
1677             auth_transaction != ifsta->auth_transaction) {
1678                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1679                        "(alg=%d transaction=%d)\n",
1680                        dev->name, auth_alg, auth_transaction);
1681                 return;
1682         }
1683
1684         if (status_code != WLAN_STATUS_SUCCESS) {
1685                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1686                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1687                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1688                         u8 algs[3];
1689                         const int num_algs = ARRAY_SIZE(algs);
1690                         int i, pos;
1691                         algs[0] = algs[1] = algs[2] = 0xff;
1692                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1693                                 algs[0] = WLAN_AUTH_OPEN;
1694                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1695                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1696                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1697                                 algs[2] = WLAN_AUTH_LEAP;
1698                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1699                                 pos = 0;
1700                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1701                                 pos = 1;
1702                         else
1703                                 pos = 2;
1704                         for (i = 0; i < num_algs; i++) {
1705                                 pos++;
1706                                 if (pos >= num_algs)
1707                                         pos = 0;
1708                                 if (algs[pos] == ifsta->auth_alg ||
1709                                     algs[pos] == 0xff)
1710                                         continue;
1711                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1712                                     !ieee80211_sta_wep_configured(dev))
1713                                         continue;
1714                                 ifsta->auth_alg = algs[pos];
1715                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1716                                        "next try\n",
1717                                        dev->name, ifsta->auth_alg);
1718                                 break;
1719                         }
1720                 }
1721                 return;
1722         }
1723
1724         switch (ifsta->auth_alg) {
1725         case WLAN_AUTH_OPEN:
1726         case WLAN_AUTH_LEAP:
1727                 ieee80211_auth_completed(dev, ifsta);
1728                 break;
1729         case WLAN_AUTH_SHARED_KEY:
1730                 if (ifsta->auth_transaction == 4)
1731                         ieee80211_auth_completed(dev, ifsta);
1732                 else
1733                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1734                 break;
1735         }
1736 }
1737
1738
1739 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1740                                      struct ieee80211_if_sta *ifsta,
1741                                      struct ieee80211_mgmt *mgmt,
1742                                      size_t len)
1743 {
1744         u16 reason_code;
1745         DECLARE_MAC_BUF(mac);
1746
1747         if (len < 24 + 2) {
1748                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1749                        "received from %s - ignored\n",
1750                        dev->name, len, print_mac(mac, mgmt->sa));
1751                 return;
1752         }
1753
1754         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1755                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1756                        "unknown AP (SA=%s BSSID=%s) - "
1757                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1758                        print_mac(mac, mgmt->bssid));
1759                 return;
1760         }
1761
1762         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1763
1764         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1765                " (reason=%d)\n",
1766                dev->name, print_mac(mac, mgmt->sa), reason_code);
1767
1768         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1769                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1770         }
1771
1772         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1773             ifsta->state == IEEE80211_ASSOCIATE ||
1774             ifsta->state == IEEE80211_ASSOCIATED) {
1775                 ifsta->state = IEEE80211_AUTHENTICATE;
1776                 mod_timer(&ifsta->timer, jiffies +
1777                                       IEEE80211_RETRY_AUTH_INTERVAL);
1778         }
1779
1780         ieee80211_set_disassoc(dev, ifsta, 1);
1781         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1782 }
1783
1784
1785 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1786                                        struct ieee80211_if_sta *ifsta,
1787                                        struct ieee80211_mgmt *mgmt,
1788                                        size_t len)
1789 {
1790         u16 reason_code;
1791         DECLARE_MAC_BUF(mac);
1792
1793         if (len < 24 + 2) {
1794                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1795                        "received from %s - ignored\n",
1796                        dev->name, len, print_mac(mac, mgmt->sa));
1797                 return;
1798         }
1799
1800         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1801                 printk(KERN_DEBUG "%s: disassociation frame received from "
1802                        "unknown AP (SA=%s BSSID=%s) - "
1803                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1804                        print_mac(mac, mgmt->bssid));
1805                 return;
1806         }
1807
1808         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1809
1810         printk(KERN_DEBUG "%s: RX disassociation from %s"
1811                " (reason=%d)\n",
1812                dev->name, print_mac(mac, mgmt->sa), reason_code);
1813
1814         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1815                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1816
1817         if (ifsta->state == IEEE80211_ASSOCIATED) {
1818                 ifsta->state = IEEE80211_ASSOCIATE;
1819                 mod_timer(&ifsta->timer, jiffies +
1820                                       IEEE80211_RETRY_AUTH_INTERVAL);
1821         }
1822
1823         ieee80211_set_disassoc(dev, ifsta, 0);
1824 }
1825
1826
1827 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1828                                          struct ieee80211_if_sta *ifsta,
1829                                          struct ieee80211_mgmt *mgmt,
1830                                          size_t len,
1831                                          int reassoc)
1832 {
1833         struct ieee80211_local *local = sdata->local;
1834         struct net_device *dev = sdata->dev;
1835         struct ieee80211_supported_band *sband;
1836         struct sta_info *sta;
1837         u64 rates, basic_rates;
1838         u16 capab_info, status_code, aid;
1839         struct ieee802_11_elems elems;
1840         struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1841         u8 *pos;
1842         int i, j;
1843         DECLARE_MAC_BUF(mac);
1844         bool have_higher_than_11mbit = false;
1845
1846         /* AssocResp and ReassocResp have identical structure, so process both
1847          * of them in this function. */
1848
1849         if (ifsta->state != IEEE80211_ASSOCIATE) {
1850                 printk(KERN_DEBUG "%s: association frame received from "
1851                        "%s, but not in associate state - ignored\n",
1852                        dev->name, print_mac(mac, mgmt->sa));
1853                 return;
1854         }
1855
1856         if (len < 24 + 6) {
1857                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1858                        "received from %s - ignored\n",
1859                        dev->name, len, print_mac(mac, mgmt->sa));
1860                 return;
1861         }
1862
1863         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1864                 printk(KERN_DEBUG "%s: association frame received from "
1865                        "unknown AP (SA=%s BSSID=%s) - "
1866                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1867                        print_mac(mac, mgmt->bssid));
1868                 return;
1869         }
1870
1871         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1872         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1873         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1874
1875         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1876                "status=%d aid=%d)\n",
1877                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1878                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1879
1880         if (status_code != WLAN_STATUS_SUCCESS) {
1881                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1882                        dev->name, status_code);
1883                 /* if this was a reassociation, ensure we try a "full"
1884                  * association next time. This works around some broken APs
1885                  * which do not correctly reject reassociation requests. */
1886                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1887                 return;
1888         }
1889
1890         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1891                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1892                        "set\n", dev->name, aid);
1893         aid &= ~(BIT(15) | BIT(14));
1894
1895         pos = mgmt->u.assoc_resp.variable;
1896         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1897
1898         if (!elems.supp_rates) {
1899                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1900                        dev->name);
1901                 return;
1902         }
1903
1904         printk(KERN_DEBUG "%s: associated\n", dev->name);
1905         ifsta->aid = aid;
1906         ifsta->ap_capab = capab_info;
1907
1908         kfree(ifsta->assocresp_ies);
1909         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1910         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1911         if (ifsta->assocresp_ies)
1912                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1913
1914         rcu_read_lock();
1915
1916         /* Add STA entry for the AP */
1917         sta = sta_info_get(local, ifsta->bssid);
1918         if (!sta) {
1919                 struct ieee80211_sta_bss *bss;
1920                 int err;
1921
1922                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1923                 if (!sta) {
1924                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1925                                " the AP\n", dev->name);
1926                         rcu_read_unlock();
1927                         return;
1928                 }
1929                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1930                                            local->hw.conf.channel->center_freq,
1931                                            ifsta->ssid, ifsta->ssid_len);
1932                 if (bss) {
1933                         sta->last_rssi = bss->rssi;
1934                         sta->last_signal = bss->signal;
1935                         sta->last_noise = bss->noise;
1936                         ieee80211_rx_bss_put(dev, bss);
1937                 }
1938
1939                 err = sta_info_insert(sta);
1940                 if (err) {
1941                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1942                                " the AP (error %d)\n", dev->name, err);
1943                         rcu_read_unlock();
1944                         return;
1945                 }
1946         }
1947
1948         /*
1949          * FIXME: Do we really need to update the sta_info's information here?
1950          *        We already know about the AP (we found it in our list) so it
1951          *        should already be filled with the right info, no?
1952          *        As is stands, all this is racy because typically we assume
1953          *        the information that is filled in here (except flags) doesn't
1954          *        change while a STA structure is alive. As such, it should move
1955          *        to between the sta_info_alloc() and sta_info_insert() above.
1956          */
1957
1958         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1959                       WLAN_STA_AUTHORIZED;
1960
1961         rates = 0;
1962         basic_rates = 0;
1963         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1964
1965         for (i = 0; i < elems.supp_rates_len; i++) {
1966                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1967
1968                 if (rate > 110)
1969                         have_higher_than_11mbit = true;
1970
1971                 for (j = 0; j < sband->n_bitrates; j++) {
1972                         if (sband->bitrates[j].bitrate == rate)
1973                                 rates |= BIT(j);
1974                         if (elems.supp_rates[i] & 0x80)
1975                                 basic_rates |= BIT(j);
1976                 }
1977         }
1978
1979         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1980                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1981
1982                 if (rate > 110)
1983                         have_higher_than_11mbit = true;
1984
1985                 for (j = 0; j < sband->n_bitrates; j++) {
1986                         if (sband->bitrates[j].bitrate == rate)
1987                                 rates |= BIT(j);
1988                         if (elems.ext_supp_rates[i] & 0x80)
1989                                 basic_rates |= BIT(j);
1990                 }
1991         }
1992
1993         sta->supp_rates[local->hw.conf.channel->band] = rates;
1994         sdata->basic_rates = basic_rates;
1995
1996         /* cf. IEEE 802.11 9.2.12 */
1997         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1998             have_higher_than_11mbit)
1999                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2000         else
2001                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2002
2003         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2004             local->ops->conf_ht) {
2005                 struct ieee80211_ht_bss_info bss_info;
2006
2007                 ieee80211_ht_cap_ie_to_ht_info(
2008                                 (struct ieee80211_ht_cap *)
2009                                 elems.ht_cap_elem, &sta->ht_info);
2010                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2011                                 (struct ieee80211_ht_addt_info *)
2012                                 elems.ht_info_elem, &bss_info);
2013                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
2014         }
2015
2016         rate_control_rate_init(sta, local);
2017
2018         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2019                 sta->flags |= WLAN_STA_WME;
2020                 rcu_read_unlock();
2021                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2022                                          elems.wmm_param_len);
2023         } else
2024                 rcu_read_unlock();
2025
2026         /* set AID, ieee80211_set_associated() will tell the driver */
2027         bss_conf->aid = aid;
2028         ieee80211_set_associated(dev, ifsta, 1);
2029
2030         ieee80211_associated(dev, ifsta);
2031 }
2032
2033
2034 /* Caller must hold local->sta_bss_lock */
2035 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2036                                         struct ieee80211_sta_bss *bss)
2037 {
2038         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2039         u8 hash_idx;
2040
2041         if (bss_mesh_cfg(bss))
2042                 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2043                                         bss_mesh_id_len(bss));
2044         else
2045                 hash_idx = STA_HASH(bss->bssid);
2046
2047         bss->hnext = local->sta_bss_hash[hash_idx];
2048         local->sta_bss_hash[hash_idx] = bss;
2049 }
2050
2051
2052 /* Caller must hold local->sta_bss_lock */
2053 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2054                                         struct ieee80211_sta_bss *bss)
2055 {
2056         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2057         struct ieee80211_sta_bss *b, *prev = NULL;
2058         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2059         while (b) {
2060                 if (b == bss) {
2061                         if (!prev)
2062                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2063                                         bss->hnext;
2064                         else
2065                                 prev->hnext = bss->hnext;
2066                         break;
2067                 }
2068                 prev = b;
2069                 b = b->hnext;
2070         }
2071 }
2072
2073
2074 static struct ieee80211_sta_bss *
2075 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2076                      u8 *ssid, u8 ssid_len)
2077 {
2078         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2079         struct ieee80211_sta_bss *bss;
2080
2081         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2082         if (!bss)
2083                 return NULL;
2084         atomic_inc(&bss->users);
2085         atomic_inc(&bss->users);
2086         memcpy(bss->bssid, bssid, ETH_ALEN);
2087         bss->freq = freq;
2088         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2089                 memcpy(bss->ssid, ssid, ssid_len);
2090                 bss->ssid_len = ssid_len;
2091         }
2092
2093         spin_lock_bh(&local->sta_bss_lock);
2094         /* TODO: order by RSSI? */
2095         list_add_tail(&bss->list, &local->sta_bss_list);
2096         __ieee80211_rx_bss_hash_add(dev, bss);
2097         spin_unlock_bh(&local->sta_bss_lock);
2098         return bss;
2099 }
2100
2101 static struct ieee80211_sta_bss *
2102 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2103                      u8 *ssid, u8 ssid_len)
2104 {
2105         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2106         struct ieee80211_sta_bss *bss;
2107
2108         spin_lock_bh(&local->sta_bss_lock);
2109         bss = local->sta_bss_hash[STA_HASH(bssid)];
2110         while (bss) {
2111                 if (!bss_mesh_cfg(bss) &&
2112                     !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2113                     bss->freq == freq &&
2114                     bss->ssid_len == ssid_len &&
2115                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2116                         atomic_inc(&bss->users);
2117                         break;
2118                 }
2119                 bss = bss->hnext;
2120         }
2121         spin_unlock_bh(&local->sta_bss_lock);
2122         return bss;
2123 }
2124
2125 #ifdef CONFIG_MAC80211_MESH
2126 static struct ieee80211_sta_bss *
2127 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2128                           u8 *mesh_cfg, int freq)
2129 {
2130         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2131         struct ieee80211_sta_bss *bss;
2132
2133         spin_lock_bh(&local->sta_bss_lock);
2134         bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2135         while (bss) {
2136                 if (bss_mesh_cfg(bss) &&
2137                     !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2138                     bss->freq == freq &&
2139                     mesh_id_len == bss->mesh_id_len &&
2140                     (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2141                                                  mesh_id_len))) {
2142                         atomic_inc(&bss->users);
2143                         break;
2144                 }
2145                 bss = bss->hnext;
2146         }
2147         spin_unlock_bh(&local->sta_bss_lock);
2148         return bss;
2149 }
2150
2151 static struct ieee80211_sta_bss *
2152 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2153                           u8 *mesh_cfg, int mesh_config_len, int freq)
2154 {
2155         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2156         struct ieee80211_sta_bss *bss;
2157
2158         if (mesh_config_len != MESH_CFG_LEN)
2159                 return NULL;
2160
2161         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2162         if (!bss)
2163                 return NULL;
2164
2165         bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2166         if (!bss->mesh_cfg) {
2167                 kfree(bss);
2168                 return NULL;
2169         }
2170
2171         if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2172                 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2173                 if (!bss->mesh_id) {
2174                         kfree(bss->mesh_cfg);
2175                         kfree(bss);
2176                         return NULL;
2177                 }
2178                 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2179         }
2180
2181         atomic_inc(&bss->users);
2182         atomic_inc(&bss->users);
2183         memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2184         bss->mesh_id_len = mesh_id_len;
2185         bss->freq = freq;
2186         spin_lock_bh(&local->sta_bss_lock);
2187         /* TODO: order by RSSI? */
2188         list_add_tail(&bss->list, &local->sta_bss_list);
2189         __ieee80211_rx_bss_hash_add(dev, bss);
2190         spin_unlock_bh(&local->sta_bss_lock);
2191         return bss;
2192 }
2193 #endif
2194
2195 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2196 {
2197         kfree(bss->wpa_ie);
2198         kfree(bss->rsn_ie);
2199         kfree(bss->wmm_ie);
2200         kfree(bss->ht_ie);
2201         kfree(bss_mesh_id(bss));
2202         kfree(bss_mesh_cfg(bss));
2203         kfree(bss);
2204 }
2205
2206
2207 static void ieee80211_rx_bss_put(struct net_device *dev,
2208                                  struct ieee80211_sta_bss *bss)
2209 {
2210         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2211         if (!atomic_dec_and_test(&bss->users))
2212                 return;
2213
2214         spin_lock_bh(&local->sta_bss_lock);
2215         __ieee80211_rx_bss_hash_del(dev, bss);
2216         list_del(&bss->list);
2217         spin_unlock_bh(&local->sta_bss_lock);
2218         ieee80211_rx_bss_free(bss);
2219 }
2220
2221
2222 void ieee80211_rx_bss_list_init(struct net_device *dev)
2223 {
2224         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2225         spin_lock_init(&local->sta_bss_lock);
2226         INIT_LIST_HEAD(&local->sta_bss_list);
2227 }
2228
2229
2230 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2231 {
2232         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2233         struct ieee80211_sta_bss *bss, *tmp;
2234
2235         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2236                 ieee80211_rx_bss_put(dev, bss);
2237 }
2238
2239
2240 static int ieee80211_sta_join_ibss(struct net_device *dev,
2241                                    struct ieee80211_if_sta *ifsta,
2242                                    struct ieee80211_sta_bss *bss)
2243 {
2244         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2245         int res, rates, i, j;
2246         struct sk_buff *skb;
2247         struct ieee80211_mgmt *mgmt;
2248         struct ieee80211_tx_control control;
2249         struct rate_selection ratesel;
2250         u8 *pos;
2251         struct ieee80211_sub_if_data *sdata;
2252         struct ieee80211_supported_band *sband;
2253
2254         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2255
2256         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2257
2258         /* Remove possible STA entries from other IBSS networks. */
2259         sta_info_flush_delayed(sdata);
2260
2261         if (local->ops->reset_tsf) {
2262                 /* Reset own TSF to allow time synchronization work. */
2263                 local->ops->reset_tsf(local_to_hw(local));
2264         }
2265         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2266         res = ieee80211_if_config(dev);
2267         if (res)
2268                 return res;
2269
2270         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2271
2272         sdata->drop_unencrypted = bss->capability &
2273                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2274
2275         res = ieee80211_set_freq(local, bss->freq);
2276
2277         if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2278                 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2279                        "%d MHz\n", dev->name, local->oper_channel->center_freq);
2280                 return -1;
2281         }
2282
2283         /* Set beacon template */
2284         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2285         do {
2286                 if (!skb)
2287                         break;
2288
2289                 skb_reserve(skb, local->hw.extra_tx_headroom);
2290
2291                 mgmt = (struct ieee80211_mgmt *)
2292                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2293                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2294                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2295                                                    IEEE80211_STYPE_BEACON);
2296                 memset(mgmt->da, 0xff, ETH_ALEN);
2297                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2298                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2299                 mgmt->u.beacon.beacon_int =
2300                         cpu_to_le16(local->hw.conf.beacon_int);
2301                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2302
2303                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2304                 *pos++ = WLAN_EID_SSID;
2305                 *pos++ = ifsta->ssid_len;
2306                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2307
2308                 rates = bss->supp_rates_len;
2309                 if (rates > 8)
2310                         rates = 8;
2311                 pos = skb_put(skb, 2 + rates);
2312                 *pos++ = WLAN_EID_SUPP_RATES;
2313                 *pos++ = rates;
2314                 memcpy(pos, bss->supp_rates, rates);
2315
2316                 if (bss->band == IEEE80211_BAND_2GHZ) {
2317                         pos = skb_put(skb, 2 + 1);
2318                         *pos++ = WLAN_EID_DS_PARAMS;
2319                         *pos++ = 1;
2320                         *pos++ = ieee80211_frequency_to_channel(bss->freq);
2321                 }
2322
2323                 pos = skb_put(skb, 2 + 2);
2324                 *pos++ = WLAN_EID_IBSS_PARAMS;
2325                 *pos++ = 2;
2326                 /* FIX: set ATIM window based on scan results */
2327                 *pos++ = 0;
2328                 *pos++ = 0;
2329
2330                 if (bss->supp_rates_len > 8) {
2331                         rates = bss->supp_rates_len - 8;
2332                         pos = skb_put(skb, 2 + rates);
2333                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2334                         *pos++ = rates;
2335                         memcpy(pos, &bss->supp_rates[8], rates);
2336                 }
2337
2338                 memset(&control, 0, sizeof(control));
2339                 rate_control_get_rate(dev, sband, skb, &ratesel);
2340                 if (!ratesel.rate) {
2341                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2342                                "for IBSS beacon\n", dev->name);
2343                         break;
2344                 }
2345                 control.vif = &sdata->vif;
2346                 control.tx_rate = ratesel.rate;
2347                 if (sdata->bss_conf.use_short_preamble &&
2348                     ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2349                         control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2350                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2351                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2352                 control.retry_limit = 1;
2353
2354                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2355                 if (ifsta->probe_resp) {
2356                         mgmt = (struct ieee80211_mgmt *)
2357                                 ifsta->probe_resp->data;
2358                         mgmt->frame_control =
2359                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2360                                              IEEE80211_STYPE_PROBE_RESP);
2361                 } else {
2362                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2363                                "template for IBSS\n", dev->name);
2364                 }
2365
2366                 if (local->ops->beacon_update &&
2367                     local->ops->beacon_update(local_to_hw(local),
2368                                              skb, &control) == 0) {
2369                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2370                                "template\n", dev->name);
2371                         skb = NULL;
2372                 }
2373
2374                 rates = 0;
2375                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2376                 for (i = 0; i < bss->supp_rates_len; i++) {
2377                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2378                         for (j = 0; j < sband->n_bitrates; j++)
2379                                 if (sband->bitrates[j].bitrate == bitrate)
2380                                         rates |= BIT(j);
2381                 }
2382                 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2383
2384                 ieee80211_sta_def_wmm_params(dev, bss, 1);
2385         } while (0);
2386
2387         if (skb) {
2388                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2389                        "template\n", dev->name);
2390                 dev_kfree_skb(skb);
2391         }
2392
2393         ifsta->state = IEEE80211_IBSS_JOINED;
2394         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2395
2396         ieee80211_rx_bss_put(dev, bss);
2397
2398         return res;
2399 }
2400
2401 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2402                             struct ieee802_11_elems *elems,
2403                             enum ieee80211_band band)
2404 {
2405         struct ieee80211_supported_band *sband;
2406         struct ieee80211_rate *bitrates;
2407         size_t num_rates;
2408         u64 supp_rates;
2409         int i, j;
2410         sband = local->hw.wiphy->bands[band];
2411
2412         if (!sband) {
2413                 WARN_ON(1);
2414                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2415         }
2416
2417         bitrates = sband->bitrates;
2418         num_rates = sband->n_bitrates;
2419         supp_rates = 0;
2420         for (i = 0; i < elems->supp_rates_len +
2421                      elems->ext_supp_rates_len; i++) {
2422                 u8 rate = 0;
2423                 int own_rate;
2424                 if (i < elems->supp_rates_len)
2425                         rate = elems->supp_rates[i];
2426                 else if (elems->ext_supp_rates)
2427                         rate = elems->ext_supp_rates
2428                                 [i - elems->supp_rates_len];
2429                 own_rate = 5 * (rate & 0x7f);
2430                 for (j = 0; j < num_rates; j++)
2431                         if (bitrates[j].bitrate == own_rate)
2432                                 supp_rates |= BIT(j);
2433         }
2434         return supp_rates;
2435 }
2436
2437
2438 static void ieee80211_rx_bss_info(struct net_device *dev,
2439                                   struct ieee80211_mgmt *mgmt,
2440                                   size_t len,
2441                                   struct ieee80211_rx_status *rx_status,
2442                                   int beacon)
2443 {
2444         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2445         struct ieee802_11_elems elems;
2446         size_t baselen;
2447         int freq, clen;
2448         struct ieee80211_sta_bss *bss;
2449         struct sta_info *sta;
2450         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2451         u64 beacon_timestamp, rx_timestamp;
2452         struct ieee80211_channel *channel;
2453         DECLARE_MAC_BUF(mac);
2454         DECLARE_MAC_BUF(mac2);
2455
2456         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2457                 return; /* ignore ProbeResp to foreign address */
2458
2459 #if 0
2460         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2461                dev->name, beacon ? "Beacon" : "Probe Response",
2462                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2463 #endif
2464
2465         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2466         if (baselen > len)
2467                 return;
2468
2469         beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2470         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2471
2472         if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2473             elems.mesh_config && mesh_matches_local(&elems, dev)) {
2474                 u64 rates = ieee80211_sta_get_rates(local, &elems,
2475                                                 rx_status->band);
2476
2477                 mesh_neighbour_update(mgmt->sa, rates, dev,
2478                                       mesh_peer_accepts_plinks(&elems, dev));
2479         }
2480
2481         rcu_read_lock();
2482
2483         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2484             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2485             (sta = sta_info_get(local, mgmt->sa))) {
2486                 u64 prev_rates;
2487                 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2488                                                         rx_status->band);
2489
2490                 prev_rates = sta->supp_rates[rx_status->band];
2491                 sta->supp_rates[rx_status->band] &= supp_rates;
2492                 if (sta->supp_rates[rx_status->band] == 0) {
2493                         /* No matching rates - this should not really happen.
2494                          * Make sure that at least one rate is marked
2495                          * supported to avoid issues with TX rate ctrl. */
2496                         sta->supp_rates[rx_status->band] =
2497                                 sdata->u.sta.supp_rates_bits[rx_status->band];
2498                 }
2499                 if (sta->supp_rates[rx_status->band] != prev_rates) {
2500                         printk(KERN_DEBUG "%s: updated supp_rates set for "
2501                                "%s based on beacon info (0x%llx & 0x%llx -> "
2502                                "0x%llx)\n",
2503                                dev->name, print_mac(mac, sta->addr),
2504                                (unsigned long long) prev_rates,
2505                                (unsigned long long) supp_rates,
2506                                (unsigned long long) sta->supp_rates[rx_status->band]);
2507                 }
2508         }
2509
2510         rcu_read_unlock();
2511
2512         if (elems.ds_params && elems.ds_params_len == 1)
2513                 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2514         else
2515                 freq = rx_status->freq;
2516
2517         channel = ieee80211_get_channel(local->hw.wiphy, freq);
2518
2519         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2520                 return;
2521
2522 #ifdef CONFIG_MAC80211_MESH
2523         if (elems.mesh_config)
2524                 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2525                                 elems.mesh_id_len, elems.mesh_config, freq);
2526         else
2527 #endif
2528                 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2529                                            elems.ssid, elems.ssid_len);
2530         if (!bss) {
2531 #ifdef CONFIG_MAC80211_MESH
2532                 if (elems.mesh_config)
2533                         bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2534                                 elems.mesh_id_len, elems.mesh_config,
2535                                 elems.mesh_config_len, freq);
2536                 else
2537 #endif
2538                         bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2539                                                    elems.ssid, elems.ssid_len);
2540                 if (!bss)
2541                         return;
2542         } else {
2543 #if 0
2544                 /* TODO: order by RSSI? */
2545                 spin_lock_bh(&local->sta_bss_lock);
2546                 list_move_tail(&bss->list, &local->sta_bss_list);
2547                 spin_unlock_bh(&local->sta_bss_lock);
2548 #endif
2549         }
2550
2551         bss->band = rx_status->band;
2552
2553         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2554             bss->probe_resp && beacon) {
2555                 /* STA mode:
2556                  * Do not allow beacon to override data from Probe Response. */
2557                 ieee80211_rx_bss_put(dev, bss);
2558                 return;
2559         }
2560
2561         /* save the ERP value so that it is available at association time */
2562         if (elems.erp_info && elems.erp_info_len >= 1) {
2563                 bss->erp_value = elems.erp_info[0];
2564                 bss->has_erp_value = 1;
2565         }
2566
2567         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2568         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2569
2570         bss->supp_rates_len = 0;
2571         if (elems.supp_rates) {
2572                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2573                 if (clen > elems.supp_rates_len)
2574                         clen = elems.supp_rates_len;
2575                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2576                        clen);
2577                 bss->supp_rates_len += clen;
2578         }
2579         if (elems.ext_supp_rates) {
2580                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2581                 if (clen > elems.ext_supp_rates_len)
2582                         clen = elems.ext_supp_rates_len;
2583                 memcpy(&bss->supp_rates[bss->supp_rates_len],
2584                        elems.ext_supp_rates, clen);
2585                 bss->supp_rates_len += clen;
2586         }
2587
2588         if (elems.wpa &&
2589             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2590              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2591                 kfree(bss->wpa_ie);
2592                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2593                 if (bss->wpa_ie) {
2594                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2595                         bss->wpa_ie_len = elems.wpa_len + 2;
2596                 } else
2597                         bss->wpa_ie_len = 0;
2598         } else if (!elems.wpa && bss->wpa_ie) {
2599                 kfree(bss->wpa_ie);
2600                 bss->wpa_ie = NULL;
2601                 bss->wpa_ie_len = 0;
2602         }
2603
2604         if (elems.rsn &&
2605             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2606              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2607                 kfree(bss->rsn_ie);
2608                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2609                 if (bss->rsn_ie) {
2610                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2611                         bss->rsn_ie_len = elems.rsn_len + 2;
2612                 } else
2613                         bss->rsn_ie_len = 0;
2614         } else if (!elems.rsn && bss->rsn_ie) {
2615                 kfree(bss->rsn_ie);
2616                 bss->rsn_ie = NULL;
2617                 bss->rsn_ie_len = 0;
2618         }
2619
2620         if (elems.wmm_param &&
2621             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2622              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2623                 kfree(bss->wmm_ie);
2624                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2625                 if (bss->wmm_ie) {
2626                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
2627                                elems.wmm_param_len + 2);
2628                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2629                 } else
2630                         bss->wmm_ie_len = 0;
2631         } else if (!elems.wmm_param && bss->wmm_ie) {
2632                 kfree(bss->wmm_ie);
2633                 bss->wmm_ie = NULL;
2634                 bss->wmm_ie_len = 0;
2635         }
2636         if (elems.ht_cap_elem &&
2637             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2638              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2639                 kfree(bss->ht_ie);
2640                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2641                 if (bss->ht_ie) {
2642                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2643                                elems.ht_cap_elem_len + 2);
2644                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2645                 } else
2646                         bss->ht_ie_len = 0;
2647         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2648                 kfree(bss->ht_ie);
2649                 bss->ht_ie = NULL;
2650                 bss->ht_ie_len = 0;
2651         }
2652
2653         bss->timestamp = beacon_timestamp;
2654         bss->last_update = jiffies;
2655         bss->rssi = rx_status->ssi;
2656         bss->signal = rx_status->signal;
2657         bss->noise = rx_status->noise;
2658         if (!beacon)
2659                 bss->probe_resp++;
2660
2661         /* check if we need to merge IBSS */
2662         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2663             !local->sta_sw_scanning && !local->sta_hw_scanning &&
2664             bss->capability & WLAN_CAPABILITY_IBSS &&
2665             bss->freq == local->oper_channel->center_freq &&
2666             elems.ssid_len == sdata->u.sta.ssid_len &&
2667             memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2668                 if (rx_status->flag & RX_FLAG_TSFT) {
2669                         /* in order for correct IBSS merging we need mactime
2670                          *
2671                          * since mactime is defined as the time the first data
2672                          * symbol of the frame hits the PHY, and the timestamp
2673                          * of the beacon is defined as "the time that the data
2674                          * symbol containing the first bit of the timestamp is
2675                          * transmitted to the PHY plus the transmitting STA’s
2676                          * delays through its local PHY from the MAC-PHY
2677                          * interface to its interface with the WM"
2678                          * (802.11 11.1.2) - equals the time this bit arrives at
2679                          * the receiver - we have to take into account the
2680                          * offset between the two.
2681                          * e.g: at 1 MBit that means mactime is 192 usec earlier
2682                          * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2683                          */
2684                         int rate = local->hw.wiphy->bands[rx_status->band]->
2685                                         bitrates[rx_status->rate_idx].bitrate;
2686                         rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2687                 } else if (local && local->ops && local->ops->get_tsf)
2688                         /* second best option: get current TSF */
2689                         rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2690                 else
2691                         /* can't merge without knowing the TSF */
2692                         rx_timestamp = -1LLU;
2693 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2694                 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2695                        "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2696                        print_mac(mac, mgmt->sa),
2697                        print_mac(mac2, mgmt->bssid),
2698                        (unsigned long long)rx_timestamp,
2699                        (unsigned long long)beacon_timestamp,
2700                        (unsigned long long)(rx_timestamp - beacon_timestamp),
2701                        jiffies);
2702 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2703                 if (beacon_timestamp > rx_timestamp) {
2704 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2705                         if (net_ratelimit())
2706 #endif
2707                                 printk(KERN_DEBUG "%s: beacon TSF higher than "
2708                                        "local TSF - IBSS merge with BSSID %s\n",
2709                                        dev->name, print_mac(mac, mgmt->bssid));
2710                         ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2711                         ieee80211_ibss_add_sta(dev, NULL,
2712                                                mgmt->bssid, mgmt->sa);
2713                 }
2714         }
2715
2716         ieee80211_rx_bss_put(dev, bss);
2717 }
2718
2719
2720 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2721                                          struct ieee80211_mgmt *mgmt,
2722                                          size_t len,
2723                                          struct ieee80211_rx_status *rx_status)
2724 {
2725         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2726 }
2727
2728
2729 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2730                                      struct ieee80211_mgmt *mgmt,
2731                                      size_t len,
2732                                      struct ieee80211_rx_status *rx_status)
2733 {
2734         struct ieee80211_sub_if_data *sdata;
2735         struct ieee80211_if_sta *ifsta;
2736         size_t baselen;
2737         struct ieee802_11_elems elems;
2738         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2739         struct ieee80211_conf *conf = &local->hw.conf;
2740         u32 changed = 0;
2741
2742         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2743
2744         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2745         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2746                 return;
2747         ifsta = &sdata->u.sta;
2748
2749         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2750             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2751                 return;
2752
2753         /* Process beacon from the current BSS */
2754         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2755         if (baselen > len)
2756                 return;
2757
2758         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2759
2760         if (elems.erp_info && elems.erp_info_len >= 1)
2761                 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2762
2763         if (elems.ht_cap_elem && elems.ht_info_elem &&
2764             elems.wmm_param && local->ops->conf_ht &&
2765             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2766                 struct ieee80211_ht_bss_info bss_info;
2767
2768                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2769                                 (struct ieee80211_ht_addt_info *)
2770                                 elems.ht_info_elem, &bss_info);
2771                 /* check if AP changed bss inforamation */
2772                 if ((conf->ht_bss_conf.primary_channel !=
2773                      bss_info.primary_channel) ||
2774                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2775                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2776                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2777                                                 &bss_info);
2778         }
2779
2780         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2781                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2782                                          elems.wmm_param_len);
2783         }
2784
2785         ieee80211_bss_info_change_notify(sdata, changed);
2786 }
2787
2788
2789 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2790                                         struct ieee80211_if_sta *ifsta,
2791                                         struct ieee80211_mgmt *mgmt,
2792                                         size_t len,
2793                                         struct ieee80211_rx_status *rx_status)
2794 {
2795         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2796         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2797         int tx_last_beacon;
2798         struct sk_buff *skb;
2799         struct ieee80211_mgmt *resp;
2800         u8 *pos, *end;
2801         DECLARE_MAC_BUF(mac);
2802 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2803         DECLARE_MAC_BUF(mac2);
2804         DECLARE_MAC_BUF(mac3);
2805 #endif
2806
2807         if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2808             ifsta->state != IEEE80211_IBSS_JOINED ||
2809             len < 24 + 2 || !ifsta->probe_resp)
2810                 return;
2811
2812         if (local->ops->tx_last_beacon)
2813                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2814         else
2815                 tx_last_beacon = 1;
2816
2817 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2818         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2819                "%s (tx_last_beacon=%d)\n",
2820                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2821                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2822 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2823
2824         if (!tx_last_beacon)
2825                 return;
2826
2827         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2828             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2829                 return;
2830
2831         end = ((u8 *) mgmt) + len;
2832         pos = mgmt->u.probe_req.variable;
2833         if (pos[0] != WLAN_EID_SSID ||
2834             pos + 2 + pos[1] > end) {
2835                 if (net_ratelimit()) {
2836                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2837                                "from %s\n",
2838                                dev->name, print_mac(mac, mgmt->sa));
2839                 }
2840                 return;
2841         }
2842         if (pos[1] != 0 &&
2843             (pos[1] != ifsta->ssid_len ||
2844              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2845                 /* Ignore ProbeReq for foreign SSID */
2846                 return;
2847         }
2848
2849         /* Reply with ProbeResp */
2850         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2851         if (!skb)
2852                 return;
2853
2854         resp = (struct ieee80211_mgmt *) skb->data;
2855         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2856 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2857         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2858                dev->name, print_mac(mac, resp->da));
2859 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2860         ieee80211_sta_tx(dev, skb, 0);
2861 }
2862
2863 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2864                                      struct ieee80211_if_sta *ifsta,
2865                                      struct ieee80211_mgmt *mgmt,
2866                                      size_t len,
2867                                      struct ieee80211_rx_status *rx_status)
2868 {
2869         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2870
2871         if (len < IEEE80211_MIN_ACTION_SIZE)
2872                 return;
2873
2874         switch (mgmt->u.action.category) {
2875         case WLAN_CATEGORY_BACK:
2876                 switch (mgmt->u.action.u.addba_req.action_code) {
2877                 case WLAN_ACTION_ADDBA_REQ:
2878                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2879                                    sizeof(mgmt->u.action.u.addba_req)))
2880                                 break;
2881                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2882                         break;
2883                 case WLAN_ACTION_ADDBA_RESP:
2884                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2885                                    sizeof(mgmt->u.action.u.addba_resp)))
2886                                 break;
2887                         ieee80211_sta_process_addba_resp(dev, mgmt, len);
2888                         break;
2889                 case WLAN_ACTION_DELBA:
2890                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2891                                    sizeof(mgmt->u.action.u.delba)))
2892                                 break;
2893                         ieee80211_sta_process_delba(dev, mgmt, len);
2894                         break;
2895                 default:
2896                         if (net_ratelimit())
2897                            printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2898                                         dev->name);
2899                         break;
2900                 }
2901                 break;
2902         case PLINK_CATEGORY:
2903                 if (ieee80211_vif_is_mesh(&sdata->vif))
2904                         mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2905                 break;
2906         case MESH_PATH_SEL_CATEGORY:
2907                 if (ieee80211_vif_is_mesh(&sdata->vif))
2908                         mesh_rx_path_sel_frame(dev, mgmt, len);
2909                 break;
2910         default:
2911                 if (net_ratelimit())
2912                         printk(KERN_DEBUG "%s: Rx unknown action frame - "
2913                         "category=%d\n", dev->name, mgmt->u.action.category);
2914                 break;
2915         }
2916 }
2917
2918 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2919                            struct ieee80211_rx_status *rx_status)
2920 {
2921         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2922         struct ieee80211_sub_if_data *sdata;
2923         struct ieee80211_if_sta *ifsta;
2924         struct ieee80211_mgmt *mgmt;
2925         u16 fc;
2926
2927         if (skb->len < 24)
2928                 goto fail;
2929
2930         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2931         ifsta = &sdata->u.sta;
2932
2933         mgmt = (struct ieee80211_mgmt *) skb->data;
2934         fc = le16_to_cpu(mgmt->frame_control);
2935
2936         switch (fc & IEEE80211_FCTL_STYPE) {
2937         case IEEE80211_STYPE_PROBE_REQ:
2938         case IEEE80211_STYPE_PROBE_RESP:
2939         case IEEE80211_STYPE_BEACON:
2940         case IEEE80211_STYPE_ACTION:
2941                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2942         case IEEE80211_STYPE_AUTH:
2943         case IEEE80211_STYPE_ASSOC_RESP:
2944         case IEEE80211_STYPE_REASSOC_RESP:
2945         case IEEE80211_STYPE_DEAUTH:
2946         case IEEE80211_STYPE_DISASSOC:
2947                 skb_queue_tail(&ifsta->skb_queue, skb);
2948                 queue_work(local->hw.workqueue, &ifsta->work);
2949                 return;
2950         default:
2951                 printk(KERN_DEBUG "%s: received unknown management frame - "
2952                        "stype=%d\n", dev->name,
2953                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2954                 break;
2955         }
2956
2957  fail:
2958         kfree_skb(skb);
2959 }
2960
2961
2962 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2963                                          struct sk_buff *skb)
2964 {
2965         struct ieee80211_rx_status *rx_status;
2966         struct ieee80211_sub_if_data *sdata;
2967         struct ieee80211_if_sta *ifsta;
2968         struct ieee80211_mgmt *mgmt;
2969         u16 fc;
2970
2971         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2972         ifsta = &sdata->u.sta;
2973
2974         rx_status = (struct ieee80211_rx_status *) skb->cb;
2975         mgmt = (struct ieee80211_mgmt *) skb->data;
2976         fc = le16_to_cpu(mgmt->frame_control);
2977
2978         switch (fc & IEEE80211_FCTL_STYPE) {
2979         case IEEE80211_STYPE_PROBE_REQ:
2980                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2981                                             rx_status);
2982                 break;
2983         case IEEE80211_STYPE_PROBE_RESP:
2984                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2985                 break;
2986         case IEEE80211_STYPE_BEACON:
2987                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2988                 break;
2989         case IEEE80211_STYPE_AUTH:
2990                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2991                 break;
2992         case IEEE80211_STYPE_ASSOC_RESP:
2993                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2994                 break;
2995         case IEEE80211_STYPE_REASSOC_RESP:
2996                 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2997                 break;
2998         case IEEE80211_STYPE_DEAUTH:
2999                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3000                 break;
3001         case IEEE80211_STYPE_DISASSOC:
3002                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3003                 break;
3004         case IEEE80211_STYPE_ACTION:
3005                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3006                 break;
3007         }
3008
3009         kfree_skb(skb);
3010 }
3011
3012
3013 ieee80211_rx_result
3014 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3015                       struct ieee80211_rx_status *rx_status)
3016 {
3017         struct ieee80211_mgmt *mgmt;
3018         u16 fc;
3019
3020         if (skb->len < 2)
3021                 return RX_DROP_UNUSABLE;
3022
3023         mgmt = (struct ieee80211_mgmt *) skb->data;
3024         fc = le16_to_cpu(mgmt->frame_control);
3025
3026         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3027                 return RX_CONTINUE;
3028
3029         if (skb->len < 24)
3030                 return RX_DROP_MONITOR;
3031
3032         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3033                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3034                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3035                                                      skb->len, rx_status);
3036                         dev_kfree_skb(skb);
3037                         return RX_QUEUED;
3038                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3039                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3040                                                  rx_status);
3041                         dev_kfree_skb(skb);
3042                         return RX_QUEUED;
3043                 }
3044         }
3045         return RX_CONTINUE;
3046 }
3047
3048
3049 static int ieee80211_sta_active_ibss(struct net_device *dev)
3050 {
3051         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3052         int active = 0;
3053         struct sta_info *sta;
3054         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3055
3056         rcu_read_lock();
3057
3058         list_for_each_entry_rcu(sta, &local->sta_list, list) {
3059                 if (sta->sdata == sdata &&
3060                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3061                                jiffies)) {
3062                         active++;
3063                         break;
3064                 }
3065         }
3066
3067         rcu_read_unlock();
3068
3069         return active;
3070 }
3071
3072
3073 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3074 {
3075         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3076         struct sta_info *sta, *tmp;
3077         LIST_HEAD(tmp_list);
3078         DECLARE_MAC_BUF(mac);
3079         unsigned long flags;
3080
3081         spin_lock_irqsave(&local->sta_lock, flags);
3082         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3083                 if (time_after(jiffies, sta->last_rx + exp_time)) {
3084                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3085                                dev->name, print_mac(mac, sta->addr));
3086                         __sta_info_unlink(&sta);
3087                         if (sta)
3088                                 list_add(&sta->list, &tmp_list);
3089                 }
3090         spin_unlock_irqrestore(&local->sta_lock, flags);
3091
3092         synchronize_rcu();
3093
3094         rtnl_lock();
3095         list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3096                 sta_info_destroy(sta);
3097         rtnl_unlock();
3098 }
3099
3100
3101 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3102                                      struct ieee80211_if_sta *ifsta)
3103 {
3104         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3105
3106         ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3107         if (ieee80211_sta_active_ibss(dev))
3108                 return;
3109
3110         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3111                "IBSS networks with same SSID (merge)\n", dev->name);
3112         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3113 }
3114
3115
3116 #ifdef CONFIG_MAC80211_MESH
3117 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3118                            struct ieee80211_if_sta *ifsta)
3119 {
3120         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3121         bool free_plinks;
3122
3123         ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3124         mesh_path_expire(dev);
3125
3126         free_plinks = mesh_plink_availables(sdata);
3127         if (free_plinks != sdata->u.sta.accepting_plinks)
3128                 ieee80211_if_config_beacon(dev);
3129
3130         mod_timer(&ifsta->timer, jiffies +
3131                         IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3132 }
3133
3134
3135 void ieee80211_start_mesh(struct net_device *dev)
3136 {
3137         struct ieee80211_if_sta *ifsta;
3138         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3139         ifsta = &sdata->u.sta;
3140         ifsta->state = IEEE80211_MESH_UP;
3141         ieee80211_sta_timer((unsigned long)sdata);
3142 }
3143 #endif
3144
3145
3146 void ieee80211_sta_timer(unsigned long data)
3147 {
3148         struct ieee80211_sub_if_data *sdata =
3149                 (struct ieee80211_sub_if_data *) data;
3150         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3151         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3152
3153         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3154         queue_work(local->hw.workqueue, &ifsta->work);
3155 }
3156
3157 void ieee80211_sta_work(struct work_struct *work)
3158 {
3159         struct ieee80211_sub_if_data *sdata =
3160                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3161         struct net_device *dev = sdata->dev;
3162         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3163         struct ieee80211_if_sta *ifsta;
3164         struct sk_buff *skb;
3165
3166         if (!netif_running(dev))
3167                 return;
3168
3169         if (local->sta_sw_scanning || local->sta_hw_scanning)
3170                 return;
3171
3172         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3173             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3174             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3175                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3176                        "(type=%d)\n", dev->name, sdata->vif.type);
3177                 return;
3178         }
3179         ifsta = &sdata->u.sta;
3180
3181         while ((skb = skb_dequeue(&ifsta->skb_queue)))
3182                 ieee80211_sta_rx_queued_mgmt(dev, skb);
3183
3184 #ifdef CONFIG_MAC80211_MESH
3185         if (ifsta->preq_queue_len &&
3186             time_after(jiffies,
3187                        ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3188                 mesh_path_start_discovery(dev);
3189 #endif
3190
3191         if (ifsta->state != IEEE80211_AUTHENTICATE &&
3192             ifsta->state != IEEE80211_ASSOCIATE &&
3193             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3194                 if (ifsta->scan_ssid_len)
3195                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3196                 else
3197                         ieee80211_sta_start_scan(dev, NULL, 0);
3198                 return;
3199         }
3200
3201         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3202                 if (ieee80211_sta_config_auth(dev, ifsta))
3203                         return;
3204                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3205         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3206                 return;
3207
3208         switch (ifsta->state) {
3209         case IEEE80211_DISABLED:
3210                 break;
3211         case IEEE80211_AUTHENTICATE:
3212                 ieee80211_authenticate(dev, ifsta);
3213                 break;
3214         case IEEE80211_ASSOCIATE:
3215                 ieee80211_associate(dev, ifsta);
3216                 break;
3217         case IEEE80211_ASSOCIATED:
3218                 ieee80211_associated(dev, ifsta);
3219                 break;
3220         case IEEE80211_IBSS_SEARCH:
3221                 ieee80211_sta_find_ibss(dev, ifsta);
3222                 break;
3223         case IEEE80211_IBSS_JOINED:
3224                 ieee80211_sta_merge_ibss(dev, ifsta);
3225                 break;
3226 #ifdef CONFIG_MAC80211_MESH
3227         case IEEE80211_MESH_UP:
3228                 ieee80211_mesh_housekeeping(dev, ifsta);
3229                 break;
3230 #endif
3231         default:
3232                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3233                        ifsta->state);
3234                 break;
3235         }
3236
3237         if (ieee80211_privacy_mismatch(dev, ifsta)) {
3238                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3239                        "mixed-cell disabled - disassociate\n", dev->name);
3240
3241                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3242                 ieee80211_set_disassoc(dev, ifsta, 0);
3243         }
3244 }
3245
3246
3247 static void ieee80211_sta_reset_auth(struct net_device *dev,
3248                                      struct ieee80211_if_sta *ifsta)
3249 {
3250         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3251
3252         if (local->ops->reset_tsf) {
3253                 /* Reset own TSF to allow time synchronization work. */
3254                 local->ops->reset_tsf(local_to_hw(local));
3255         }
3256
3257         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3258
3259
3260         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3261                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3262         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3263                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3264         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3265                 ifsta->auth_alg = WLAN_AUTH_LEAP;
3266         else
3267                 ifsta->auth_alg = WLAN_AUTH_OPEN;
3268         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3269                ifsta->auth_alg);
3270         ifsta->auth_transaction = -1;
3271         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3272         ifsta->auth_tries = ifsta->assoc_tries = 0;
3273         netif_carrier_off(dev);
3274 }
3275
3276
3277 void ieee80211_sta_req_auth(struct net_device *dev,
3278                             struct ieee80211_if_sta *ifsta)
3279 {
3280         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3281         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3282
3283         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3284                 return;
3285
3286         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3287                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3288             (ifsta->flags & (IEEE80211_STA_SSID_SET |
3289                                 IEEE80211_STA_AUTO_SSID_SEL))) {
3290                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3291                 queue_work(local->hw.workqueue, &ifsta->work);
3292         }
3293 }
3294
3295 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3296                                     const char *ssid, int ssid_len)
3297 {
3298         int tmp, hidden_ssid;
3299
3300         if (ssid_len == ifsta->ssid_len &&
3301             !memcmp(ifsta->ssid, ssid, ssid_len))
3302                 return 1;
3303
3304         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3305                 return 0;
3306
3307         hidden_ssid = 1;
3308         tmp = ssid_len;
3309         while (tmp--) {
3310                 if (ssid[tmp] != '\0') {
3311                         hidden_ssid = 0;
3312                         break;
3313                 }
3314         }
3315
3316         if (hidden_ssid && ifsta->ssid_len == ssid_len)
3317                 return 1;
3318
3319         if (ssid_len == 1 && ssid[0] == ' ')
3320                 return 1;
3321
3322         return 0;
3323 }
3324
3325 static int ieee80211_sta_config_auth(struct net_device *dev,
3326                                      struct ieee80211_if_sta *ifsta)
3327 {
3328         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3329         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3330         struct ieee80211_sta_bss *bss, *selected = NULL;
3331         int top_rssi = 0, freq;
3332
3333         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3334             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3335                 ifsta->state = IEEE80211_AUTHENTICATE;
3336                 ieee80211_sta_reset_auth(dev, ifsta);
3337                 return 0;
3338         }
3339
3340         spin_lock_bh(&local->sta_bss_lock);
3341         freq = local->oper_channel->center_freq;
3342         list_for_each_entry(bss, &local->sta_bss_list, list) {
3343                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3344                         continue;
3345
3346                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3347                     !!sdata->default_key)
3348                         continue;
3349
3350                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3351                     bss->freq != freq)
3352                         continue;
3353
3354                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3355                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3356                         continue;
3357
3358                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3359                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3360                         continue;
3361
3362                 if (!selected || top_rssi < bss->rssi) {
3363                         selected = bss;
3364                         top_rssi = bss->rssi;
3365                 }
3366         }
3367         if (selected)
3368                 atomic_inc(&selected->users);
3369         spin_unlock_bh(&local->sta_bss_lock);
3370
3371         if (selected) {
3372                 ieee80211_set_freq(local, selected->freq);
3373                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3374                         ieee80211_sta_set_ssid(dev, selected->ssid,
3375                                                selected->ssid_len);
3376                 ieee80211_sta_set_bssid(dev, selected->bssid);
3377                 ieee80211_sta_def_wmm_params(dev, selected, 0);
3378                 ieee80211_rx_bss_put(dev, selected);
3379                 ifsta->state = IEEE80211_AUTHENTICATE;
3380                 ieee80211_sta_reset_auth(dev, ifsta);
3381                 return 0;
3382         } else {
3383                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3384                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3385                                 ieee80211_sta_start_scan(dev, NULL, 0);
3386                         else
3387                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
3388                                                          ifsta->ssid_len);
3389                         ifsta->state = IEEE80211_AUTHENTICATE;
3390                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3391                 } else
3392                         ifsta->state = IEEE80211_DISABLED;
3393         }
3394         return -1;
3395 }
3396
3397
3398 static int ieee80211_sta_create_ibss(struct net_device *dev,
3399                                      struct ieee80211_if_sta *ifsta)
3400 {
3401         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3402         struct ieee80211_sta_bss *bss;
3403         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3404         struct ieee80211_supported_band *sband;
3405         u8 bssid[ETH_ALEN], *pos;
3406         int i;
3407         DECLARE_MAC_BUF(mac);
3408
3409 #if 0
3410         /* Easier testing, use fixed BSSID. */
3411         memset(bssid, 0xfe, ETH_ALEN);
3412 #else
3413         /* Generate random, not broadcast, locally administered BSSID. Mix in
3414          * own MAC address to make sure that devices that do not have proper
3415          * random number generator get different BSSID. */
3416         get_random_bytes(bssid, ETH_ALEN);
3417         for (i = 0; i < ETH_ALEN; i++)
3418                 bssid[i] ^= dev->dev_addr[i];
3419         bssid[0] &= ~0x01;
3420         bssid[0] |= 0x02;
3421 #endif
3422
3423         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3424                dev->name, print_mac(mac, bssid));
3425
3426         bss = ieee80211_rx_bss_add(dev, bssid,
3427                                    local->hw.conf.channel->center_freq,
3428                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3429         if (!bss)
3430                 return -ENOMEM;
3431
3432         bss->band = local->hw.conf.channel->band;
3433         sband = local->hw.wiphy->bands[bss->band];
3434
3435         if (local->hw.conf.beacon_int == 0)
3436                 local->hw.conf.beacon_int = 10000;
3437         bss->beacon_int = local->hw.conf.beacon_int;
3438         bss->last_update = jiffies;
3439         bss->capability = WLAN_CAPABILITY_IBSS;
3440         if (sdata->default_key) {
3441                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3442         } else
3443                 sdata->drop_unencrypted = 0;
3444         bss->supp_rates_len = sband->n_bitrates;
3445         pos = bss->supp_rates;
3446         for (i = 0; i < sband->n_bitrates; i++) {
3447                 int rate = sband->bitrates[i].bitrate;
3448                 *pos++ = (u8) (rate / 5);
3449         }
3450
3451         return ieee80211_sta_join_ibss(dev, ifsta, bss);
3452 }
3453
3454
3455 static int ieee80211_sta_find_ibss(struct net_device *dev,
3456                                    struct ieee80211_if_sta *ifsta)
3457 {
3458         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3459         struct ieee80211_sta_bss *bss;
3460         int found = 0;
3461         u8 bssid[ETH_ALEN];
3462         int active_ibss;
3463         DECLARE_MAC_BUF(mac);
3464         DECLARE_MAC_BUF(mac2);
3465
3466         if (ifsta->ssid_len == 0)
3467                 return -EINVAL;
3468
3469         active_ibss = ieee80211_sta_active_ibss(dev);
3470 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3471         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3472                dev->name, active_ibss);
3473 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3474         spin_lock_bh(&local->sta_bss_lock);
3475         list_for_each_entry(bss, &local->sta_bss_list, list) {
3476                 if (ifsta->ssid_len != bss->ssid_len ||
3477                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3478                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
3479                         continue;
3480 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3481                 printk(KERN_DEBUG "   bssid=%s found\n",
3482                        print_mac(mac, bss->bssid));
3483 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3484                 memcpy(bssid, bss->bssid, ETH_ALEN);
3485                 found = 1;
3486                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3487                         break;
3488         }
3489         spin_unlock_bh(&local->sta_bss_lock);
3490
3491 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3492         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
3493                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3494 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3495         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3496             (bss = ieee80211_rx_bss_get(dev, bssid,
3497                                         local->hw.conf.channel->center_freq,
3498                                         ifsta->ssid, ifsta->ssid_len))) {
3499                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3500                        " based on configured SSID\n",
3501                        dev->name, print_mac(mac, bssid));
3502                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3503         }
3504 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3505         printk(KERN_DEBUG "   did not try to join ibss\n");
3506 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3507
3508         /* Selected IBSS not found in current scan results - try to scan */
3509         if (ifsta->state == IEEE80211_IBSS_JOINED &&
3510             !ieee80211_sta_active_ibss(dev)) {
3511                 mod_timer(&ifsta->timer, jiffies +
3512                                       IEEE80211_IBSS_MERGE_INTERVAL);
3513         } else if (time_after(jiffies, local->last_scan_completed +
3514                               IEEE80211_SCAN_INTERVAL)) {
3515                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3516                        "join\n", dev->name);
3517                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3518                                               ifsta->ssid_len);
3519         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3520                 int interval = IEEE80211_SCAN_INTERVAL;
3521
3522                 if (time_after(jiffies, ifsta->ibss_join_req +
3523                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
3524                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3525                             (!(local->oper_channel->flags &
3526                                         IEEE80211_CHAN_NO_IBSS)))
3527                                 return ieee80211_sta_create_ibss(dev, ifsta);
3528                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3529                                 printk(KERN_DEBUG "%s: IBSS not allowed on"
3530                                        " %d MHz\n", dev->name,
3531                                        local->hw.conf.channel->center_freq);
3532                         }
3533
3534                         /* No IBSS found - decrease scan interval and continue
3535                          * scanning. */
3536                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
3537                 }
3538
3539                 ifsta->state = IEEE80211_IBSS_SEARCH;
3540                 mod_timer(&ifsta->timer, jiffies + interval);
3541                 return 0;
3542         }
3543
3544         return 0;
3545 }
3546
3547
3548 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3549 {
3550         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3551         struct ieee80211_if_sta *ifsta;
3552
3553         if (len > IEEE80211_MAX_SSID_LEN)
3554                 return -EINVAL;
3555
3556         ifsta = &sdata->u.sta;
3557
3558         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3559                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3560         memcpy(ifsta->ssid, ssid, len);
3561         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3562         ifsta->ssid_len = len;
3563
3564         if (len)
3565                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3566         else
3567                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3568         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3569             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3570                 ifsta->ibss_join_req = jiffies;
3571                 ifsta->state = IEEE80211_IBSS_SEARCH;
3572                 return ieee80211_sta_find_ibss(dev, ifsta);
3573         }
3574         return 0;
3575 }
3576
3577
3578 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3579 {
3580         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3581         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3582         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3583         *len = ifsta->ssid_len;
3584         return 0;
3585 }
3586
3587
3588 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3589 {
3590         struct ieee80211_sub_if_data *sdata;
3591         struct ieee80211_if_sta *ifsta;
3592         int res;
3593
3594         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3595         ifsta = &sdata->u.sta;
3596
3597         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3598                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3599                 res = ieee80211_if_config(dev);
3600                 if (res) {
3601                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3602                                "the low-level driver\n", dev->name);
3603                         return res;
3604                 }
3605         }
3606
3607         if (is_valid_ether_addr(bssid))
3608                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3609         else
3610                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3611
3612         return 0;
3613 }
3614
3615
3616 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3617                                     struct ieee80211_sub_if_data *sdata,
3618                                     int powersave)
3619 {
3620         struct sk_buff *skb;
3621         struct ieee80211_hdr *nullfunc;
3622         u16 fc;
3623
3624         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3625         if (!skb) {
3626                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3627                        "frame\n", sdata->dev->name);
3628                 return;
3629         }
3630         skb_reserve(skb, local->hw.extra_tx_headroom);
3631
3632         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3633         memset(nullfunc, 0, 24);
3634         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3635              IEEE80211_FCTL_TODS;
3636         if (powersave)
3637                 fc |= IEEE80211_FCTL_PM;
3638         nullfunc->frame_control = cpu_to_le16(fc);
3639         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3640         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3641         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3642
3643         ieee80211_sta_tx(sdata->dev, skb, 0);
3644 }
3645
3646
3647 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3648 {
3649         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3650             ieee80211_vif_is_mesh(&sdata->vif))
3651                 ieee80211_sta_timer((unsigned long)sdata);
3652 }
3653
3654 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3655 {
3656         struct ieee80211_local *local = hw_to_local(hw);
3657         struct net_device *dev = local->scan_dev;
3658         struct ieee80211_sub_if_data *sdata;
3659         union iwreq_data wrqu;
3660
3661         local->last_scan_completed = jiffies;
3662         memset(&wrqu, 0, sizeof(wrqu));
3663         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3664
3665         if (local->sta_hw_scanning) {
3666                 local->sta_hw_scanning = 0;
3667                 if (ieee80211_hw_config(local))
3668                         printk(KERN_DEBUG "%s: failed to restore operational "
3669                                "channel after scan\n", dev->name);
3670                 /* Restart STA timer for HW scan case */
3671                 rcu_read_lock();
3672                 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3673                         ieee80211_restart_sta_timer(sdata);
3674                 rcu_read_unlock();
3675
3676                 goto done;
3677         }
3678
3679         local->sta_sw_scanning = 0;
3680         if (ieee80211_hw_config(local))
3681                 printk(KERN_DEBUG "%s: failed to restore operational "
3682                        "channel after scan\n", dev->name);
3683
3684
3685         netif_tx_lock_bh(local->mdev);
3686         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3687         local->ops->configure_filter(local_to_hw(local),
3688                                      FIF_BCN_PRBRESP_PROMISC,
3689                                      &local->filter_flags,
3690                                      local->mdev->mc_count,
3691                                      local->mdev->mc_list);
3692
3693         netif_tx_unlock_bh(local->mdev);
3694
3695         rcu_read_lock();
3696         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3697
3698                 /* No need to wake the master device. */
3699                 if (sdata->dev == local->mdev)
3700                         continue;
3701
3702                 /* Tell AP we're back */
3703                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3704                     sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3705                         ieee80211_send_nullfunc(local, sdata, 0);
3706
3707                 ieee80211_restart_sta_timer(sdata);
3708
3709                 netif_wake_queue(sdata->dev);
3710         }
3711         rcu_read_unlock();
3712
3713 done:
3714         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3715         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3716                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3717                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3718                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3719                     !ieee80211_sta_active_ibss(dev)))
3720                         ieee80211_sta_find_ibss(dev, ifsta);
3721         }
3722 }
3723 EXPORT_SYMBOL(ieee80211_scan_completed);
3724
3725 void ieee80211_sta_scan_work(struct work_struct *work)
3726 {
3727         struct ieee80211_local *local =
3728                 container_of(work, struct ieee80211_local, scan_work.work);
3729         struct net_device *dev = local->scan_dev;
3730         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3731         struct ieee80211_supported_band *sband;
3732         struct ieee80211_channel *chan;
3733         int skip;
3734         unsigned long next_delay = 0;
3735
3736         if (!local->sta_sw_scanning)
3737                 return;
3738
3739         switch (local->scan_state) {
3740         case SCAN_SET_CHANNEL:
3741                 /*
3742                  * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3743                  * after we successfully scanned the last channel of the last
3744                  * band (and the last band is supported by the hw)
3745                  */
3746                 if (local->scan_band < IEEE80211_NUM_BANDS)
3747                         sband = local->hw.wiphy->bands[local->scan_band];
3748                 else
3749                         sband = NULL;
3750
3751                 /*
3752                  * If we are at an unsupported band and have more bands
3753                  * left to scan, advance to the next supported one.
3754                  */
3755                 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3756                         local->scan_band++;
3757                         sband = local->hw.wiphy->bands[local->scan_band];
3758                         local->scan_channel_idx = 0;
3759                 }
3760
3761                 /* if no more bands/channels left, complete scan */
3762                 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3763                         ieee80211_scan_completed(local_to_hw(local));
3764                         return;
3765                 }
3766                 skip = 0;
3767                 chan = &sband->channels[local->scan_channel_idx];
3768
3769                 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3770                     (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3771                      chan->flags & IEEE80211_CHAN_NO_IBSS))
3772                         skip = 1;
3773
3774                 if (!skip) {
3775                         local->scan_channel = chan;
3776                         if (ieee80211_hw_config(local)) {
3777                                 printk(KERN_DEBUG "%s: failed to set freq to "
3778                                        "%d MHz for scan\n", dev->name,
3779                                        chan->center_freq);
3780                                 skip = 1;
3781                         }
3782                 }
3783
3784                 /* advance state machine to next channel/band */
3785                 local->scan_channel_idx++;
3786                 if (local->scan_channel_idx >= sband->n_channels) {
3787                         /*
3788                          * scan_band may end up == IEEE80211_NUM_BANDS, but
3789                          * we'll catch that case above and complete the scan
3790                          * if that is the case.
3791                          */
3792                         local->scan_band++;
3793                         local->scan_channel_idx = 0;
3794                 }
3795
3796                 if (skip)
3797                         break;
3798
3799                 next_delay = IEEE80211_PROBE_DELAY +
3800                              usecs_to_jiffies(local->hw.channel_change_time);
3801                 local->scan_state = SCAN_SEND_PROBE;
3802                 break;
3803         case SCAN_SEND_PROBE:
3804                 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3805                 local->scan_state = SCAN_SET_CHANNEL;
3806
3807                 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3808                         break;
3809                 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3810                                          local->scan_ssid_len);
3811                 next_delay = IEEE80211_CHANNEL_TIME;
3812                 break;
3813         }
3814
3815         if (local->sta_sw_scanning)
3816                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3817                                    next_delay);
3818 }
3819
3820
3821 static int ieee80211_sta_start_scan(struct net_device *dev,
3822                                     u8 *ssid, size_t ssid_len)
3823 {
3824         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3825         struct ieee80211_sub_if_data *sdata;
3826
3827         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3828                 return -EINVAL;
3829
3830         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3831          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3832          * BSSID: MACAddress
3833          * SSID
3834          * ScanType: ACTIVE, PASSIVE
3835          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3836          *    a Probe frame during active scanning
3837          * ChannelList
3838          * MinChannelTime (>= ProbeDelay), in TU
3839          * MaxChannelTime: (>= MinChannelTime), in TU
3840          */
3841
3842          /* MLME-SCAN.confirm
3843           * BSSDescriptionSet
3844           * ResultCode: SUCCESS, INVALID_PARAMETERS
3845          */
3846
3847         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3848                 if (local->scan_dev == dev)
3849                         return 0;
3850                 return -EBUSY;
3851         }
3852
3853         if (local->ops->hw_scan) {
3854                 int rc = local->ops->hw_scan(local_to_hw(local),
3855                                              ssid, ssid_len);
3856                 if (!rc) {
3857                         local->sta_hw_scanning = 1;
3858                         local->scan_dev = dev;
3859                 }
3860                 return rc;
3861         }
3862
3863         local->sta_sw_scanning = 1;
3864
3865         rcu_read_lock();
3866         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3867
3868                 /* Don't stop the master interface, otherwise we can't transmit
3869                  * probes! */
3870                 if (sdata->dev == local->mdev)
3871                         continue;
3872
3873                 netif_stop_queue(sdata->dev);
3874                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3875                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3876                         ieee80211_send_nullfunc(local, sdata, 1);
3877         }
3878         rcu_read_unlock();
3879
3880         if (ssid) {
3881                 local->scan_ssid_len = ssid_len;
3882                 memcpy(local->scan_ssid, ssid, ssid_len);
3883         } else
3884                 local->scan_ssid_len = 0;
3885         local->scan_state = SCAN_SET_CHANNEL;
3886         local->scan_channel_idx = 0;
3887         local->scan_band = IEEE80211_BAND_2GHZ;
3888         local->scan_dev = dev;
3889
3890         netif_tx_lock_bh(local->mdev);
3891         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3892         local->ops->configure_filter(local_to_hw(local),
3893                                      FIF_BCN_PRBRESP_PROMISC,
3894                                      &local->filter_flags,
3895                                      local->mdev->mc_count,
3896                                      local->mdev->mc_list);
3897         netif_tx_unlock_bh(local->mdev);
3898
3899         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3900         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3901                            IEEE80211_CHANNEL_TIME);
3902
3903         return 0;
3904 }
3905
3906
3907 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3908 {
3909         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3910         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3911         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3912
3913         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3914                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3915
3916         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3917                 if (local->scan_dev == dev)
3918                         return 0;
3919                 return -EBUSY;
3920         }
3921
3922         ifsta->scan_ssid_len = ssid_len;
3923         if (ssid_len)
3924                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3925         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3926         queue_work(local->hw.workqueue, &ifsta->work);
3927         return 0;
3928 }
3929
3930 static char *
3931 ieee80211_sta_scan_result(struct net_device *dev,
3932                           struct ieee80211_sta_bss *bss,
3933                           char *current_ev, char *end_buf)
3934 {
3935         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3936         struct iw_event iwe;
3937
3938         if (time_after(jiffies,
3939                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3940                 return current_ev;
3941
3942         memset(&iwe, 0, sizeof(iwe));
3943         iwe.cmd = SIOCGIWAP;
3944         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3945         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3946         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3947                                           IW_EV_ADDR_LEN);
3948
3949         memset(&iwe, 0, sizeof(iwe));
3950         iwe.cmd = SIOCGIWESSID;
3951         if (bss_mesh_cfg(bss)) {
3952                 iwe.u.data.length = bss_mesh_id_len(bss);
3953                 iwe.u.data.flags = 1;
3954                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3955                                                   bss_mesh_id(bss));
3956         } else {
3957                 iwe.u.data.length = bss->ssid_len;
3958                 iwe.u.data.flags = 1;
3959                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3960                                                   bss->ssid);
3961         }
3962
3963         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3964             || bss_mesh_cfg(bss)) {
3965                 memset(&iwe, 0, sizeof(iwe));
3966                 iwe.cmd = SIOCGIWMODE;
3967                 if (bss_mesh_cfg(bss))
3968                         iwe.u.mode = IW_MODE_MESH;
3969                 else if (bss->capability & WLAN_CAPABILITY_ESS)
3970                         iwe.u.mode = IW_MODE_MASTER;
3971                 else
3972                         iwe.u.mode = IW_MODE_ADHOC;
3973                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3974                                                   IW_EV_UINT_LEN);
3975         }
3976
3977         memset(&iwe, 0, sizeof(iwe));
3978         iwe.cmd = SIOCGIWFREQ;
3979         iwe.u.freq.m = bss->freq;
3980         iwe.u.freq.e = 6;
3981         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3982                                           IW_EV_FREQ_LEN);
3983
3984         memset(&iwe, 0, sizeof(iwe));
3985         iwe.cmd = SIOCGIWFREQ;
3986         iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3987         iwe.u.freq.e = 0;
3988         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3989                                           IW_EV_FREQ_LEN);
3990
3991         memset(&iwe, 0, sizeof(iwe));
3992         iwe.cmd = IWEVQUAL;
3993         iwe.u.qual.qual = bss->signal;
3994         iwe.u.qual.level = bss->rssi;
3995         iwe.u.qual.noise = bss->noise;
3996         iwe.u.qual.updated = local->wstats_flags;
3997         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3998                                           IW_EV_QUAL_LEN);
3999
4000         memset(&iwe, 0, sizeof(iwe));
4001         iwe.cmd = SIOCGIWENCODE;
4002         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4003                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4004         else
4005                 iwe.u.data.flags = IW_ENCODE_DISABLED;
4006         iwe.u.data.length = 0;
4007         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4008
4009         if (bss && bss->wpa_ie) {
4010                 memset(&iwe, 0, sizeof(iwe));
4011                 iwe.cmd = IWEVGENIE;
4012                 iwe.u.data.length = bss->wpa_ie_len;
4013                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4014                                                   bss->wpa_ie);
4015         }
4016
4017         if (bss && bss->rsn_ie) {
4018                 memset(&iwe, 0, sizeof(iwe));
4019                 iwe.cmd = IWEVGENIE;
4020                 iwe.u.data.length = bss->rsn_ie_len;
4021                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4022                                                   bss->rsn_ie);
4023         }
4024
4025         if (bss && bss->supp_rates_len > 0) {
4026                 /* display all supported rates in readable format */
4027                 char *p = current_ev + IW_EV_LCP_LEN;
4028                 int i;
4029
4030                 memset(&iwe, 0, sizeof(iwe));
4031                 iwe.cmd = SIOCGIWRATE;
4032                 /* Those two flags are ignored... */
4033                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4034
4035                 for (i = 0; i < bss->supp_rates_len; i++) {
4036                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
4037                                                         0x7f) * 500000);
4038                         p = iwe_stream_add_value(current_ev, p,
4039                                         end_buf, &iwe, IW_EV_PARAM_LEN);
4040                 }
4041                 current_ev = p;
4042         }
4043
4044         if (bss) {
4045                 char *buf;
4046                 buf = kmalloc(30, GFP_ATOMIC);
4047                 if (buf) {
4048                         memset(&iwe, 0, sizeof(iwe));
4049                         iwe.cmd = IWEVCUSTOM;
4050                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4051                         iwe.u.data.length = strlen(buf);
4052                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4053                                                           &iwe, buf);
4054                         kfree(buf);
4055                 }
4056         }
4057
4058         if (bss_mesh_cfg(bss)) {
4059                 char *buf;
4060                 u8 *cfg = bss_mesh_cfg(bss);
4061                 buf = kmalloc(50, GFP_ATOMIC);
4062                 if (buf) {
4063                         memset(&iwe, 0, sizeof(iwe));
4064                         iwe.cmd = IWEVCUSTOM;
4065                         sprintf(buf, "Mesh network (version %d)", cfg[0]);
4066                         iwe.u.data.length = strlen(buf);
4067                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4068                                                           &iwe, buf);
4069                         sprintf(buf, "Path Selection Protocol ID: "
4070                                 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4071                                                         cfg[4]);
4072                         iwe.u.data.length = strlen(buf);
4073                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4074                                                           &iwe, buf);
4075                         sprintf(buf, "Path Selection Metric ID: "
4076                                 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4077                                                         cfg[8]);
4078                         iwe.u.data.length = strlen(buf);
4079                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4080                                                           &iwe, buf);
4081                         sprintf(buf, "Congestion Control Mode ID: "
4082                                 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4083                                                         cfg[11], cfg[12]);
4084                         iwe.u.data.length = strlen(buf);
4085                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4086                                                           &iwe, buf);
4087                         sprintf(buf, "Channel Precedence: "
4088                                 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4089                                                         cfg[15], cfg[16]);
4090                         iwe.u.data.length = strlen(buf);
4091                         current_ev = iwe_stream_add_point(current_ev, end_buf,
4092                                                           &iwe, buf);
4093                         kfree(buf);
4094                 }
4095         }
4096
4097         return current_ev;
4098 }
4099
4100
4101 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4102 {
4103         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4104         char *current_ev = buf;
4105         char *end_buf = buf + len;
4106         struct ieee80211_sta_bss *bss;
4107
4108         spin_lock_bh(&local->sta_bss_lock);
4109         list_for_each_entry(bss, &local->sta_bss_list, list) {
4110                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4111                         spin_unlock_bh(&local->sta_bss_lock);
4112                         return -E2BIG;
4113                 }
4114                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4115                                                        end_buf);
4116         }
4117         spin_unlock_bh(&local->sta_bss_lock);
4118         return current_ev - buf;
4119 }
4120
4121
4122 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4123 {
4124         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4125         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4126         kfree(ifsta->extra_ie);
4127         if (len == 0) {
4128                 ifsta->extra_ie = NULL;
4129                 ifsta->extra_ie_len = 0;
4130                 return 0;
4131         }
4132         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4133         if (!ifsta->extra_ie) {
4134                 ifsta->extra_ie_len = 0;
4135                 return -ENOMEM;
4136         }
4137         memcpy(ifsta->extra_ie, ie, len);
4138         ifsta->extra_ie_len = len;
4139         return 0;
4140 }
4141
4142
4143 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4144                                          struct sk_buff *skb, u8 *bssid,
4145                                          u8 *addr)
4146 {
4147         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4148         struct sta_info *sta;
4149         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4150         DECLARE_MAC_BUF(mac);
4151
4152         /* TODO: Could consider removing the least recently used entry and
4153          * allow new one to be added. */
4154         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4155                 if (net_ratelimit()) {
4156                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4157                                "entry %s\n", dev->name, print_mac(mac, addr));
4158                 }
4159                 return NULL;
4160         }
4161
4162         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4163                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4164
4165         sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4166         if (!sta)
4167                 return NULL;
4168
4169         sta->flags |= WLAN_STA_AUTHORIZED;
4170
4171         sta->supp_rates[local->hw.conf.channel->band] =
4172                 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4173
4174         rate_control_rate_init(sta, local);
4175
4176         if (sta_info_insert(sta))
4177                 return NULL;
4178
4179         return sta;
4180 }
4181
4182
4183 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4184 {
4185         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4186         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4187
4188         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4189                dev->name, reason);
4190
4191         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4192             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4193                 return -EINVAL;
4194
4195         ieee80211_send_deauth(dev, ifsta, reason);
4196         ieee80211_set_disassoc(dev, ifsta, 1);
4197         return 0;
4198 }
4199
4200
4201 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4202 {
4203         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4204         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4205
4206         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4207                dev->name, reason);
4208
4209         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4210                 return -EINVAL;
4211
4212         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4213                 return -1;
4214
4215         ieee80211_send_disassoc(dev, ifsta, reason);
4216         ieee80211_set_disassoc(dev, ifsta, 0);
4217         return 0;
4218 }