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