net/mac80211/ieee80211_sta.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /* TODO:
  15  * order BSS list by RSSI(?) ("quality of AP")
  16  * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
  17  *    SSID)
  18  */
  19 #include <linux/delay.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/wireless.h>
  25 #include <linux/random.h>
  26 #include <linux/etherdevice.h>
  27 #include <net/iw_handler.h>
  28 #include <asm/types.h>
  29
  30 #include <net/mac80211.h>
  31 #include "ieee80211_i.h"
  32 #include "ieee80211_rate.h"
  33 #include "ieee80211_led.h"
  34
  35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
  36 #define IEEE80211_AUTH_MAX_TRIES 3
  37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
  38 #define IEEE80211_ASSOC_MAX_TRIES 3
  39 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
  40 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
  41 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
  42 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
  43 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
  44 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
  45
  46 #define IEEE80211_PROBE_DELAY (HZ / 33)
  47 #define IEEE80211_CHANNEL_TIME (HZ / 33)
  48 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
  49 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  50 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
  51 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
  52
  53 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  54
  55
  56 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
  57
  58 #define ERP_INFO_USE_PROTECTION BIT(1)
  59
  60 /* mgmt header + 1 byte action code */
  61 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
  62
  63 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
  64 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
  65 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
  66
  67 /* next values represent the buffer size for A-MPDU frame.
  68  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
  69 #define IEEE80211_MIN_AMPDU_BUF 0x8
  70 #define IEEE80211_MAX_AMPDU_BUF 0x40
  71
  72 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
  73                                      u8 *ssid, size_t ssid_len);
  74 static struct ieee80211_sta_bss *
  75 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
  76                      u8 *ssid, u8 ssid_len);
  77 static void ieee80211_rx_bss_put(struct net_device *dev,
  78                                  struct ieee80211_sta_bss *bss);
  79 static int ieee80211_sta_find_ibss(struct net_device *dev,
  80                                    struct ieee80211_if_sta *ifsta);
  81 static int ieee80211_sta_wep_configured(struct net_device *dev);
  82 static int ieee80211_sta_start_scan(struct net_device *dev,
  83                                     u8 *ssid, size_t ssid_len);
  84 static int ieee80211_sta_config_auth(struct net_device *dev,
  85                                      struct ieee80211_if_sta *ifsta);
  86
  87
  88 /* Parsed Information Elements */
  89 struct ieee802_11_elems {
  90         /* pointers to IEs */
  91         u8 *ssid;
  92         u8 *supp_rates;
  93         u8 *fh_params;
  94         u8 *ds_params;
  95         u8 *cf_params;
  96         u8 *tim;
  97         u8 *ibss_params;
  98         u8 *challenge;
  99         u8 *wpa;
 100         u8 *rsn;
 101         u8 *erp_info;
 102         u8 *ext_supp_rates;
 103         u8 *wmm_info;
 104         u8 *wmm_param;
 105         u8 *ht_cap_elem;
 106         u8 *ht_info_elem;
 107         /* length of them, respectively */
 108         u8 ssid_len;
 109         u8 supp_rates_len;
 110         u8 fh_params_len;
 111         u8 ds_params_len;
 112         u8 cf_params_len;
 113         u8 tim_len;
 114         u8 ibss_params_len;
 115         u8 challenge_len;
 116         u8 wpa_len;
 117         u8 rsn_len;
 118         u8 erp_info_len;
 119         u8 ext_supp_rates_len;
 120         u8 wmm_info_len;
 121         u8 wmm_param_len;
 122         u8 ht_cap_elem_len;
 123         u8 ht_info_elem_len;
 124 };
 125
 126 static void ieee802_11_parse_elems(u8 *start, size_t len,
 127                                    struct ieee802_11_elems *elems)
 128 {
 129         size_t left = len;
 130         u8 *pos = start;
 131
 132         memset(elems, 0, sizeof(*elems));
 133
 134         while (left >= 2) {
 135                 u8 id, elen;
 136
 137                 id = *pos++;
 138                 elen = *pos++;
 139                 left -= 2;
 140
 141                 if (elen > left)
 142                         return;
 143
 144                 switch (id) {
 145                 case WLAN_EID_SSID:
 146                         elems->ssid = pos;
 147                         elems->ssid_len = elen;
 148                         break;
 149                 case WLAN_EID_SUPP_RATES:
 150                         elems->supp_rates = pos;
 151                         elems->supp_rates_len = elen;
 152                         break;
 153                 case WLAN_EID_FH_PARAMS:
 154                         elems->fh_params = pos;
 155                         elems->fh_params_len = elen;
 156                         break;
 157                 case WLAN_EID_DS_PARAMS:
 158                         elems->ds_params = pos;
 159                         elems->ds_params_len = elen;
 160                         break;
 161                 case WLAN_EID_CF_PARAMS:
 162                         elems->cf_params = pos;
 163                         elems->cf_params_len = elen;
 164                         break;
 165                 case WLAN_EID_TIM:
 166                         elems->tim = pos;
 167                         elems->tim_len = elen;
 168                         break;
 169                 case WLAN_EID_IBSS_PARAMS:
 170                         elems->ibss_params = pos;
 171                         elems->ibss_params_len = elen;
 172                         break;
 173                 case WLAN_EID_CHALLENGE:
 174                         elems->challenge = pos;
 175                         elems->challenge_len = elen;
 176                         break;
 177                 case WLAN_EID_WPA:
 178                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 179                             pos[2] == 0xf2) {
 180                                 /* Microsoft OUI (00:50:F2) */
 181                                 if (pos[3] == 1) {
 182                                         /* OUI Type 1 - WPA IE */
 183                                         elems->wpa = pos;
 184                                         elems->wpa_len = elen;
 185                                 } else if (elen >= 5 && pos[3] == 2) {
 186                                         if (pos[4] == 0) {
 187                                                 elems->wmm_info = pos;
 188                                                 elems->wmm_info_len = elen;
 189                                         } else if (pos[4] == 1) {
 190                                                 elems->wmm_param = pos;
 191                                                 elems->wmm_param_len = elen;
 192                                         }
 193                                 }
 194                         }
 195                         break;
 196                 case WLAN_EID_RSN:
 197                         elems->rsn = pos;
 198                         elems->rsn_len = elen;
 199                         break;
 200                 case WLAN_EID_ERP_INFO:
 201                         elems->erp_info = pos;
 202                         elems->erp_info_len = elen;
 203                         break;
 204                 case WLAN_EID_EXT_SUPP_RATES:
 205                         elems->ext_supp_rates = pos;
 206                         elems->ext_supp_rates_len = elen;
 207                         break;
 208                 case WLAN_EID_HT_CAPABILITY:
 209                         elems->ht_cap_elem = pos;
 210                         elems->ht_cap_elem_len = elen;
 211                         break;
 212                 case WLAN_EID_HT_EXTRA_INFO:
 213                         elems->ht_info_elem = pos;
 214                         elems->ht_info_elem_len = elen;
 215                         break;
 216                 default:
 217                         break;
 218                 }
 219
 220                 left -= elen;
 221                 pos += elen;
 222         }
 223 }
 224
 225
 226 static int ecw2cw(int ecw)
 227 {
 228         int cw = 1;
 229         while (ecw > 0) {
 230                 cw <<= 1;
 231                 ecw--;
 232         }
 233         return cw - 1;
 234 }
 235
 236 static void ieee80211_sta_wmm_params(struct net_device *dev,
 237                                      struct ieee80211_if_sta *ifsta,
 238                                      u8 *wmm_param, size_t wmm_param_len)
 239 {
 240         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 241         struct ieee80211_tx_queue_params params;
 242         size_t left;
 243         int count;
 244         u8 *pos;
 245
 246         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 247                 return;
 248         count = wmm_param[6] & 0x0f;
 249         if (count == ifsta->wmm_last_param_set)
 250                 return;
 251         ifsta->wmm_last_param_set = count;
 252
 253         pos = wmm_param + 8;
 254         left = wmm_param_len - 8;
 255
 256         memset(&params, 0, sizeof(params));
 257
 258         if (!local->ops->conf_tx)
 259                 return;
 260
 261         local->wmm_acm = 0;
 262         for (; left >= 4; left -= 4, pos += 4) {
 263                 int aci = (pos[0] >> 5) & 0x03;
 264                 int acm = (pos[0] >> 4) & 0x01;
 265                 int queue;
 266
 267                 switch (aci) {
 268                 case 1:
 269                         queue = IEEE80211_TX_QUEUE_DATA3;
 270                         if (acm) {
 271                                 local->wmm_acm |= BIT(0) | BIT(3);
 272                         }
 273                         break;
 274                 case 2:
 275                         queue = IEEE80211_TX_QUEUE_DATA1;
 276                         if (acm) {
 277                                 local->wmm_acm |= BIT(4) | BIT(5);
 278                         }
 279                         break;
 280                 case 3:
 281                         queue = IEEE80211_TX_QUEUE_DATA0;
 282                         if (acm) {
 283                                 local->wmm_acm |= BIT(6) | BIT(7);
 284                         }
 285                         break;
 286                 case 0:
 287                 default:
 288                         queue = IEEE80211_TX_QUEUE_DATA2;
 289                         if (acm) {
 290                                 local->wmm_acm |= BIT(1) | BIT(2);
 291                         }
 292                         break;
 293                 }
 294
 295                 params.aifs = pos[0] & 0x0f;
 296                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 297                 params.cw_min = ecw2cw(pos[1] & 0x0f);
 298                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 299                 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 300                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
 301                        "cWmin=%d cWmax=%d burst=%d\n",
 302                        dev->name, queue, aci, acm, params.aifs, params.cw_min,
 303                        params.cw_max, params.burst_time);
 304                 /* TODO: handle ACM (block TX, fallback to next lowest allowed
 305                  * AC for now) */
 306                 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
 307                         printk(KERN_DEBUG "%s: failed to set TX queue "
 308                                "parameters for queue %d\n", dev->name, queue);
 309                 }
 310         }
 311 }
 312
 313
 314 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
 315 {
 316         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 317         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 318         int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
 319         int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
 320         u8 changes = 0;
 321         DECLARE_MAC_BUF(mac);
 322
 323         if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
 324                 if (net_ratelimit()) {
 325                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
 326                                "%s)\n",
 327                                dev->name,
 328                                use_protection ? "enabled" : "disabled",
 329                                print_mac(mac, ifsta->bssid));
 330                 }
 331                 if (use_protection)
 332                         sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
 333                 else
 334                         sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
 335                 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
 336         }
 337
 338         if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
 339                 if (net_ratelimit()) {
 340                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
 341                                " (BSSID=%s)\n",
 342                                dev->name,
 343                                (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
 344                                         "short" : "long",
 345                                print_mac(mac, ifsta->bssid));
 346                 }
 347                 if (preamble_mode)
 348                         sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
 349                 else
 350                         sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
 351                 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
 352         }
 353
 354         if (changes)
 355                 ieee80211_erp_info_change_notify(dev, changes);
 356 }
 357
 358 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 359                                    struct ieee80211_ht_info *ht_info)
 360 {
 361
 362         if (ht_info == NULL)
 363                 return -EINVAL;
 364
 365         memset(ht_info, 0, sizeof(*ht_info));
 366
 367         if (ht_cap_ie) {
 368                 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
 369
 370                 ht_info->ht_supported = 1;
 371                 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
 372                 ht_info->ampdu_factor =
 373                         ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
 374                 ht_info->ampdu_density =
 375                         (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
 376                 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
 377         } else
 378                 ht_info->ht_supported = 0;
 379
 380         return 0;
 381 }
 382
 383 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 384                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 385                         struct ieee80211_ht_bss_info *bss_info)
 386 {
 387         if (bss_info == NULL)
 388                 return -EINVAL;
 389
 390         memset(bss_info, 0, sizeof(*bss_info));
 391
 392         if (ht_add_info_ie) {
 393                 u16 op_mode;
 394                 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
 395
 396                 bss_info->primary_channel = ht_add_info_ie->control_chan;
 397                 bss_info->bss_cap = ht_add_info_ie->ht_param;
 398                 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
 399         }
 400
 401         return 0;
 402 }
 403
 404 static void ieee80211_sta_send_associnfo(struct net_device *dev,
 405                                          struct ieee80211_if_sta *ifsta)
 406 {
 407         char *buf;
 408         size_t len;
 409         int i;
 410         union iwreq_data wrqu;
 411
 412         if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
 413                 return;
 414
 415         buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
 416                                 ifsta->assocresp_ies_len), GFP_KERNEL);
 417         if (!buf)
 418                 return;
 419
 420         len = sprintf(buf, "ASSOCINFO(");
 421         if (ifsta->assocreq_ies) {
 422                 len += sprintf(buf + len, "ReqIEs=");
 423                 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
 424                         len += sprintf(buf + len, "%02x",
 425                                        ifsta->assocreq_ies[i]);
 426                 }
 427         }
 428         if (ifsta->assocresp_ies) {
 429                 if (ifsta->assocreq_ies)
 430                         len += sprintf(buf + len, " ");
 431                 len += sprintf(buf + len, "RespIEs=");
 432                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 433                         len += sprintf(buf + len, "%02x",
 434                                        ifsta->assocresp_ies[i]);
 435                 }
 436         }
 437         len += sprintf(buf + len, ")");
 438
 439         if (len > IW_CUSTOM_MAX) {
 440                 len = sprintf(buf, "ASSOCRESPIE=");
 441                 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
 442                         len += sprintf(buf + len, "%02x",
 443                                        ifsta->assocresp_ies[i]);
 444                 }
 445         }
 446
 447         memset(&wrqu, 0, sizeof(wrqu));
 448         wrqu.data.length = len;
 449         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 450
 451         kfree(buf);
 452 }
 453
 454
 455 static void ieee80211_set_associated(struct net_device *dev,
 456                                      struct ieee80211_if_sta *ifsta,
 457                                      bool assoc)
 458 {
 459         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 460         union iwreq_data wrqu;
 461
 462         if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
 463                 return;
 464
 465         if (assoc) {
 466                 struct ieee80211_sub_if_data *sdata;
 467                 struct ieee80211_sta_bss *bss;
 468
 469                 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
 470
 471                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 472                 if (sdata->type != IEEE80211_IF_TYPE_STA)
 473                         return;
 474
 475                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
 476                                            local->hw.conf.channel,
 477                                            ifsta->ssid, ifsta->ssid_len);
 478                 if (bss) {
 479                         if (bss->has_erp_value)
 480                                 ieee80211_handle_erp_ie(dev, bss->erp_value);
 481                         ieee80211_rx_bss_put(dev, bss);
 482                 }
 483
 484                 netif_carrier_on(dev);
 485                 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
 486                 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
 487                 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
 488                 ieee80211_sta_send_associnfo(dev, ifsta);
 489         } else {
 490                 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
 491
 492                 netif_carrier_off(dev);
 493                 ieee80211_reset_erp_info(dev);
 494                 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 495         }
 496         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 497         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 498         ifsta->last_probe = jiffies;
 499         ieee80211_led_assoc(local, assoc);
 500 }
 501
 502 static void ieee80211_set_disassoc(struct net_device *dev,
 503                                    struct ieee80211_if_sta *ifsta, int deauth)
 504 {
 505         if (deauth)
 506                 ifsta->auth_tries = 0;
 507         ifsta->assoc_tries = 0;
 508         ieee80211_set_associated(dev, ifsta, 0);
 509 }
 510
 511 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 512                              int encrypt)
 513 {
 514         struct ieee80211_sub_if_data *sdata;
 515         struct ieee80211_tx_packet_data *pkt_data;
 516
 517         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 518         skb->dev = sdata->local->mdev;
 519         skb_set_mac_header(skb, 0);
 520         skb_set_network_header(skb, 0);
 521         skb_set_transport_header(skb, 0);
 522
 523         pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
 524         memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
 525         pkt_data->ifindex = sdata->dev->ifindex;
 526         if (!encrypt)
 527                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 528
 529         dev_queue_xmit(skb);
 530 }
 531
 532
 533 static void ieee80211_send_auth(struct net_device *dev,
 534                                 struct ieee80211_if_sta *ifsta,
 535                                 int transaction, u8 *extra, size_t extra_len,
 536                                 int encrypt)
 537 {
 538         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 539         struct sk_buff *skb;
 540         struct ieee80211_mgmt *mgmt;
 541
 542         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 543                             sizeof(*mgmt) + 6 + extra_len);
 544         if (!skb) {
 545                 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
 546                        "frame\n", dev->name);
 547                 return;
 548         }
 549         skb_reserve(skb, local->hw.extra_tx_headroom);
 550
 551         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
 552         memset(mgmt, 0, 24 + 6);
 553         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 554                                            IEEE80211_STYPE_AUTH);
 555         if (encrypt)
 556                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 557         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 558         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 559         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 560         mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
 561         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
 562         ifsta->auth_transaction = transaction + 1;
 563         mgmt->u.auth.status_code = cpu_to_le16(0);
 564         if (extra)
 565                 memcpy(skb_put(skb, extra_len), extra, extra_len);
 566
 567         ieee80211_sta_tx(dev, skb, encrypt);
 568 }
 569
 570
 571 static void ieee80211_authenticate(struct net_device *dev,
 572                                    struct ieee80211_if_sta *ifsta)
 573 {
 574         DECLARE_MAC_BUF(mac);
 575
 576         ifsta->auth_tries++;
 577         if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 578                 printk(KERN_DEBUG "%s: authentication with AP %s"
 579                        " timed out\n",
 580                        dev->name, print_mac(mac, ifsta->bssid));
 581                 ifsta->state = IEEE80211_DISABLED;
 582                 return;
 583         }
 584
 585         ifsta->state = IEEE80211_AUTHENTICATE;
 586         printk(KERN_DEBUG "%s: authenticate with AP %s\n",
 587                dev->name, print_mac(mac, ifsta->bssid));
 588
 589         ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
 590
 591         mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 592 }
 593
 594
 595 static void ieee80211_send_assoc(struct net_device *dev,
 596                                  struct ieee80211_if_sta *ifsta)
 597 {
 598         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 599         struct ieee80211_hw_mode *mode;
 600         struct sk_buff *skb;
 601         struct ieee80211_mgmt *mgmt;
 602         u8 *pos, *ies;
 603         int i, len;
 604         u16 capab;
 605         struct ieee80211_sta_bss *bss;
 606         int wmm = 0;
 607
 608         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
 609                             sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
 610                             ifsta->ssid_len);
 611         if (!skb) {
 612                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
 613                        "frame\n", dev->name);
 614                 return;
 615         }
 616         skb_reserve(skb, local->hw.extra_tx_headroom);
 617
 618         mode = local->oper_hw_mode;
 619         capab = ifsta->capab;
 620         if (mode->mode == MODE_IEEE80211G) {
 621                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 622                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 623         }
 624         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 625                                    ifsta->ssid, ifsta->ssid_len);
 626         if (bss) {
 627                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 628                         capab |= WLAN_CAPABILITY_PRIVACY;
 629                 if (bss->wmm_ie) {
 630                         wmm = 1;
 631                 }
 632                 ieee80211_rx_bss_put(dev, bss);
 633         }
 634
 635         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 636         memset(mgmt, 0, 24);
 637         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 638         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 639         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 640
 641         if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
 642                 skb_put(skb, 10);
 643                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 644                                                    IEEE80211_STYPE_REASSOC_REQ);
 645                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 646                 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
 647                 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
 648                        ETH_ALEN);
 649         } else {
 650                 skb_put(skb, 4);
 651                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 652                                                    IEEE80211_STYPE_ASSOC_REQ);
 653                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 654                 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
 655         }
 656
 657         /* SSID */
 658         ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
 659         *pos++ = WLAN_EID_SSID;
 660         *pos++ = ifsta->ssid_len;
 661         memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 662
 663         len = mode->num_rates;
 664         if (len > 8)
 665                 len = 8;
 666         pos = skb_put(skb, len + 2);
 667         *pos++ = WLAN_EID_SUPP_RATES;
 668         *pos++ = len;
 669         for (i = 0; i < len; i++) {
 670                 int rate = mode->rates[i].rate;
 671                 *pos++ = (u8) (rate / 5);
 672         }
 673
 674         if (mode->num_rates > len) {
 675                 pos = skb_put(skb, mode->num_rates - len + 2);
 676                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 677                 *pos++ = mode->num_rates - len;
 678                 for (i = len; i < mode->num_rates; i++) {
 679                         int rate = mode->rates[i].rate;
 680                         *pos++ = (u8) (rate / 5);
 681                 }
 682         }
 683
 684         if (ifsta->extra_ie) {
 685                 pos = skb_put(skb, ifsta->extra_ie_len);
 686                 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
 687         }
 688
 689         if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
 690                 pos = skb_put(skb, 9);
 691                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 692                 *pos++ = 7; /* len */
 693                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 694                 *pos++ = 0x50;
 695                 *pos++ = 0xf2;
 696                 *pos++ = 2; /* WME */
 697                 *pos++ = 0; /* WME info */
 698                 *pos++ = 1; /* WME ver */
 699                 *pos++ = 0;
 700         }
 701         /* wmm support is a must to HT */
 702         if (wmm && mode->ht_info.ht_supported) {
 703                 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
 704                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
 705                 *pos++ = WLAN_EID_HT_CAPABILITY;
 706                 *pos++ = sizeof(struct ieee80211_ht_cap);
 707                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 708                 memcpy(pos, &tmp, sizeof(u16));
 709                 pos += sizeof(u16);
 710                 *pos++ = (mode->ht_info.ampdu_factor |
 711                                 (mode->ht_info.ampdu_density << 2));
 712                 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
 713         }
 714
 715         kfree(ifsta->assocreq_ies);
 716         ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
 717         ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
 718         if (ifsta->assocreq_ies)
 719                 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
 720
 721         ieee80211_sta_tx(dev, skb, 0);
 722 }
 723
 724
 725 static void ieee80211_send_deauth(struct net_device *dev,
 726                                   struct ieee80211_if_sta *ifsta, u16 reason)
 727 {
 728         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 729         struct sk_buff *skb;
 730         struct ieee80211_mgmt *mgmt;
 731
 732         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 733         if (!skb) {
 734                 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
 735                        "frame\n", dev->name);
 736                 return;
 737         }
 738         skb_reserve(skb, local->hw.extra_tx_headroom);
 739
 740         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 741         memset(mgmt, 0, 24);
 742         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 743         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 744         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 745         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 746                                            IEEE80211_STYPE_DEAUTH);
 747         skb_put(skb, 2);
 748         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 749
 750         ieee80211_sta_tx(dev, skb, 0);
 751 }
 752
 753
 754 static void ieee80211_send_disassoc(struct net_device *dev,
 755                                     struct ieee80211_if_sta *ifsta, u16 reason)
 756 {
 757         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 758         struct sk_buff *skb;
 759         struct ieee80211_mgmt *mgmt;
 760
 761         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
 762         if (!skb) {
 763                 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
 764                        "frame\n", dev->name);
 765                 return;
 766         }
 767         skb_reserve(skb, local->hw.extra_tx_headroom);
 768
 769         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 770         memset(mgmt, 0, 24);
 771         memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
 772         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 773         memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
 774         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 775                                            IEEE80211_STYPE_DISASSOC);
 776         skb_put(skb, 2);
 777         mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
 778
 779         ieee80211_sta_tx(dev, skb, 0);
 780 }
 781
 782
 783 static int ieee80211_privacy_mismatch(struct net_device *dev,
 784                                       struct ieee80211_if_sta *ifsta)
 785 {
 786         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 787         struct ieee80211_sta_bss *bss;
 788         int bss_privacy;
 789         int wep_privacy;
 790         int privacy_invoked;
 791
 792         if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
 793                 return 0;
 794
 795         bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
 796                                    ifsta->ssid, ifsta->ssid_len);
 797         if (!bss)
 798                 return 0;
 799
 800         bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
 801         wep_privacy = !!ieee80211_sta_wep_configured(dev);
 802         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 803
 804         ieee80211_rx_bss_put(dev, bss);
 805
 806         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
 807                 return 0;
 808
 809         return 1;
 810 }
 811
 812
 813 static void ieee80211_associate(struct net_device *dev,
 814                                 struct ieee80211_if_sta *ifsta)
 815 {
 816         DECLARE_MAC_BUF(mac);
 817
 818         ifsta->assoc_tries++;
 819         if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 820                 printk(KERN_DEBUG "%s: association with AP %s"
 821                        " timed out\n",
 822                        dev->name, print_mac(mac, ifsta->bssid));
 823                 ifsta->state = IEEE80211_DISABLED;
 824                 return;
 825         }
 826
 827         ifsta->state = IEEE80211_ASSOCIATE;
 828         printk(KERN_DEBUG "%s: associate with AP %s\n",
 829                dev->name, print_mac(mac, ifsta->bssid));
 830         if (ieee80211_privacy_mismatch(dev, ifsta)) {
 831                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
 832                        "mixed-cell disabled - abort association\n", dev->name);
 833                 ifsta->state = IEEE80211_DISABLED;
 834                 return;
 835         }
 836
 837         ieee80211_send_assoc(dev, ifsta);
 838
 839         mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
 840 }
 841
 842
 843 static void ieee80211_associated(struct net_device *dev,
 844                                  struct ieee80211_if_sta *ifsta)
 845 {
 846         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 847         struct sta_info *sta;
 848         int disassoc;
 849         DECLARE_MAC_BUF(mac);
 850
 851         /* TODO: start monitoring current AP signal quality and number of
 852          * missed beacons. Scan other channels every now and then and search
 853          * for better APs. */
 854         /* TODO: remove expired BSSes */
 855
 856         ifsta->state = IEEE80211_ASSOCIATED;
 857
 858         sta = sta_info_get(local, ifsta->bssid);
 859         if (!sta) {
 860                 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
 861                        dev->name, print_mac(mac, ifsta->bssid));
 862                 disassoc = 1;
 863         } else {
 864                 disassoc = 0;
 865                 if (time_after(jiffies,
 866                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 867                         if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
 868                                 printk(KERN_DEBUG "%s: No ProbeResp from "
 869                                        "current AP %s - assume out of "
 870                                        "range\n",
 871                                        dev->name, print_mac(mac, ifsta->bssid));
 872                                 disassoc = 1;
 873                                 sta_info_free(sta);
 874                         } else
 875                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 876                                                          local->scan_ssid,
 877                                                          local->scan_ssid_len);
 878                         ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
 879                 } else {
 880                         ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
 881                         if (time_after(jiffies, ifsta->last_probe +
 882                                        IEEE80211_PROBE_INTERVAL)) {
 883                                 ifsta->last_probe = jiffies;
 884                                 ieee80211_send_probe_req(dev, ifsta->bssid,
 885                                                          ifsta->ssid,
 886                                                          ifsta->ssid_len);
 887                         }
 888                 }
 889                 sta_info_put(sta);
 890         }
 891         if (disassoc) {
 892                 ifsta->state = IEEE80211_DISABLED;
 893                 ieee80211_set_associated(dev, ifsta, 0);
 894         } else {
 895                 mod_timer(&ifsta->timer, jiffies +
 896                                       IEEE80211_MONITORING_INTERVAL);
 897         }
 898 }
 899
 900
 901 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
 902                                      u8 *ssid, size_t ssid_len)
 903 {
 904         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 905         struct ieee80211_hw_mode *mode;
 906         struct sk_buff *skb;
 907         struct ieee80211_mgmt *mgmt;
 908         u8 *pos, *supp_rates, *esupp_rates = NULL;
 909         int i;
 910
 911         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
 912         if (!skb) {
 913                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
 914                        "request\n", dev->name);
 915                 return;
 916         }
 917         skb_reserve(skb, local->hw.extra_tx_headroom);
 918
 919         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 920         memset(mgmt, 0, 24);
 921         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
 922                                            IEEE80211_STYPE_PROBE_REQ);
 923         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
 924         if (dst) {
 925                 memcpy(mgmt->da, dst, ETH_ALEN);
 926                 memcpy(mgmt->bssid, dst, ETH_ALEN);
 927         } else {
 928                 memset(mgmt->da, 0xff, ETH_ALEN);
 929                 memset(mgmt->bssid, 0xff, ETH_ALEN);
 930         }
 931         pos = skb_put(skb, 2 + ssid_len);
 932         *pos++ = WLAN_EID_SSID;
 933         *pos++ = ssid_len;
 934         memcpy(pos, ssid, ssid_len);
 935
 936         supp_rates = skb_put(skb, 2);
 937         supp_rates[0] = WLAN_EID_SUPP_RATES;
 938         supp_rates[1] = 0;
 939         mode = local->oper_hw_mode;
 940         for (i = 0; i < mode->num_rates; i++) {
 941                 struct ieee80211_rate *rate = &mode->rates[i];
 942                 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
 943                         continue;
 944                 if (esupp_rates) {
 945                         pos = skb_put(skb, 1);
 946                         esupp_rates[1]++;
 947                 } else if (supp_rates[1] == 8) {
 948                         esupp_rates = skb_put(skb, 3);
 949                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 950                         esupp_rates[1] = 1;
 951                         pos = &esupp_rates[2];
 952                 } else {
 953                         pos = skb_put(skb, 1);
 954                         supp_rates[1]++;
 955                 }
 956                 *pos = rate->rate / 5;
 957         }
 958
 959         ieee80211_sta_tx(dev, skb, 0);
 960 }
 961
 962
 963 static int ieee80211_sta_wep_configured(struct net_device *dev)
 964 {
 965         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 966         if (!sdata || !sdata->default_key ||
 967             sdata->default_key->conf.alg != ALG_WEP)
 968                 return 0;
 969         return 1;
 970 }
 971
 972
 973 static void ieee80211_auth_completed(struct net_device *dev,
 974                                      struct ieee80211_if_sta *ifsta)
 975 {
 976         printk(KERN_DEBUG "%s: authenticated\n", dev->name);
 977         ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
 978         ieee80211_associate(dev, ifsta);
 979 }
 980
 981
 982 static void ieee80211_auth_challenge(struct net_device *dev,
 983                                      struct ieee80211_if_sta *ifsta,
 984                                      struct ieee80211_mgmt *mgmt,
 985                                      size_t len)
 986 {
 987         u8 *pos;
 988         struct ieee802_11_elems elems;
 989
 990         printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
 991         pos = mgmt->u.auth.variable;
 992         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
 993         if (!elems.challenge) {
 994                 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
 995                        "frame\n", dev->name);
 996                 return;
 997         }
 998         ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
 999                             elems.challenge_len + 2, 1);
1000 }
1001
1002 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1003                                         u8 dialog_token, u16 status, u16 policy,
1004                                         u16 buf_size, u16 timeout)
1005 {
1006         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1008         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1009         struct sk_buff *skb;
1010         struct ieee80211_mgmt *mgmt;
1011         u16 capab;
1012
1013         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1014                                         sizeof(mgmt->u.action.u.addba_resp));
1015         if (!skb) {
1016                 printk(KERN_DEBUG "%s: failed to allocate buffer "
1017                        "for addba resp frame\n", dev->name);
1018                 return;
1019         }
1020
1021         skb_reserve(skb, local->hw.extra_tx_headroom);
1022         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1023         memset(mgmt, 0, 24);
1024         memcpy(mgmt->da, da, ETH_ALEN);
1025         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1026         if (sdata->type == IEEE80211_IF_TYPE_AP)
1027                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1028         else
1029                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1030         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1031                                            IEEE80211_STYPE_ACTION);
1032
1033         skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1034         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1035         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1036         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1037
1038         capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
1039         capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
1040         capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
1041
1042         mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1043         mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1044         mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1045
1046         ieee80211_sta_tx(dev, skb, 0);
1047
1048         return;
1049 }
1050
1051 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1052                                                 struct ieee80211_mgmt *mgmt,
1053                                                 size_t len)
1054 {
1055         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1056         struct ieee80211_hw *hw = &local->hw;
1057         struct ieee80211_conf *conf = &hw->conf;
1058         struct sta_info *sta;
1059         struct tid_ampdu_rx *tid_agg_rx;
1060         u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1061         u8 dialog_token;
1062         int ret = -EOPNOTSUPP;
1063         DECLARE_MAC_BUF(mac);
1064
1065         sta = sta_info_get(local, mgmt->sa);
1066         if (!sta)
1067                 return;
1068
1069         /* extract session parameters from addba request frame */
1070         dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1071         timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1072         start_seq_num =
1073                 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1074
1075         capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1076         ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1077         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1078         buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1079
1080         status = WLAN_STATUS_REQUEST_DECLINED;
1081
1082         /* sanity check for incoming parameters:
1083          * check if configuration can support the BA policy
1084          * and if buffer size does not exceeds max value */
1085         if (((ba_policy != 1)
1086                 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1087                 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1088                 status = WLAN_STATUS_INVALID_QOS_PARAM;
1089 #ifdef CONFIG_MAC80211_HT_DEBUG
1090                 if (net_ratelimit())
1091                         printk(KERN_DEBUG "Block Ack Req with bad params from "
1092                                 "%s on tid %u. policy %d, buffer size %d\n",
1093                                 print_mac(mac, mgmt->sa), tid, ba_policy,
1094                                 buf_size);
1095 #endif /* CONFIG_MAC80211_HT_DEBUG */
1096                 goto end_no_lock;
1097         }
1098         /* determine default buffer size */
1099         if (buf_size == 0) {
1100                 struct ieee80211_hw_mode *mode = conf->mode;
1101                 buf_size = IEEE80211_MIN_AMPDU_BUF;
1102                 buf_size = buf_size << mode->ht_info.ampdu_factor;
1103         }
1104
1105         tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1106
1107         /* examine state machine */
1108         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1109
1110         if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1111 #ifdef CONFIG_MAC80211_HT_DEBUG
1112                 if (net_ratelimit())
1113                         printk(KERN_DEBUG "unexpected Block Ack Req from "
1114                                 "%s on tid %u\n",
1115                                 print_mac(mac, mgmt->sa), tid);
1116 #endif /* CONFIG_MAC80211_HT_DEBUG */
1117                 goto end;
1118         }
1119
1120         /* prepare reordering buffer */
1121         tid_agg_rx->reorder_buf =
1122                 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1123         if ((!tid_agg_rx->reorder_buf) && net_ratelimit()) {
1124                 printk(KERN_ERR "can not allocate reordering buffer "
1125                                                 "to tid %d\n", tid);
1126                 goto end;
1127         }
1128         memset(tid_agg_rx->reorder_buf, 0,
1129                 buf_size * sizeof(struct sk_buf *));
1130
1131         if (local->ops->ampdu_action)
1132                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1133                                                sta->addr, tid, start_seq_num);
1134 #ifdef CONFIG_MAC80211_HT_DEBUG
1135         printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1136 #endif /* CONFIG_MAC80211_HT_DEBUG */
1137
1138         if (ret) {
1139                 kfree(tid_agg_rx->reorder_buf);
1140                 goto end;
1141         }
1142
1143         /* change state and send addba resp */
1144         tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1145         tid_agg_rx->dialog_token = dialog_token;
1146         tid_agg_rx->ssn = start_seq_num;
1147         tid_agg_rx->head_seq_num = start_seq_num;
1148         tid_agg_rx->buf_size = buf_size;
1149         tid_agg_rx->timeout = timeout;
1150         tid_agg_rx->stored_mpdu_num = 0;
1151         status = WLAN_STATUS_SUCCESS;
1152 end:
1153         spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1154
1155 end_no_lock:
1156         ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1157                                 status, 1, buf_size, timeout);
1158         sta_info_put(sta);
1159 }
1160
1161 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1162                                 u16 initiator, u16 reason_code)
1163 {
1164         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1165         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1166         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1167         struct sk_buff *skb;
1168         struct ieee80211_mgmt *mgmt;
1169         u16 params;
1170
1171         skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1172                                         sizeof(mgmt->u.action.u.delba));
1173
1174         if (!skb) {
1175                 printk(KERN_ERR "%s: failed to allocate buffer "
1176                                         "for delba frame\n", dev->name);
1177                 return;
1178         }
1179
1180         skb_reserve(skb, local->hw.extra_tx_headroom);
1181         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1182         memset(mgmt, 0, 24);
1183         memcpy(mgmt->da, da, ETH_ALEN);
1184         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1185         if (sdata->type == IEEE80211_IF_TYPE_AP)
1186                 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1187         else
1188                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1189         mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1190                                         IEEE80211_STYPE_ACTION);
1191
1192         skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1193
1194         mgmt->u.action.category = WLAN_CATEGORY_BACK;
1195         mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1196         params = (u16)(initiator << 11);        /* bit 11 initiator */
1197         params |= (u16)(tid << 12);             /* bit 15:12 TID number */
1198
1199         mgmt->u.action.u.delba.params = cpu_to_le16(params);
1200         mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1201
1202         ieee80211_sta_tx(dev, skb, 0);
1203 }
1204
1205 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1206                                         u16 initiator, u16 reason)
1207 {
1208         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1209         struct ieee80211_hw *hw = &local->hw;
1210         struct sta_info *sta;
1211         int ret, i;
1212
1213         sta = sta_info_get(local, ra);
1214         if (!sta)
1215                 return;
1216
1217         /* check if TID is in operational state */
1218         spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1219         if (sta->ampdu_mlme.tid_rx[tid].state
1220                                 != HT_AGG_STATE_OPERATIONAL) {
1221                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1222                 if (net_ratelimit())
1223                         printk(KERN_DEBUG "rx BA session requested to stop on "
1224                                 "inactive tid %d\n", tid);
1225                 sta_info_put(sta);
1226                 return;
1227         }
1228         sta->ampdu_mlme.tid_rx[tid].state =
1229                 HT_AGG_STATE_REQ_STOP_BA_MSK |
1230                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1231                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1232
1233         /* stop HW Rx aggregation. ampdu_action existence
1234          * already verified in session init so we add the BUG_ON */
1235         BUG_ON(!local->ops->ampdu_action);
1236
1237         ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1238                                         ra, tid, EINVAL);
1239         if (ret)
1240                 printk(KERN_DEBUG "HW problem - can not stop rx "
1241                                 "aggergation for tid %d\n", tid);
1242
1243         /* shutdown timer has not expired */
1244         if (initiator != WLAN_BACK_TIMER)
1245                 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1246                                         session_timer);
1247
1248         /* check if this is a self generated aggregation halt */
1249         if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1250                 ieee80211_send_delba(dev, ra, tid, 0, reason);
1251
1252         /* free the reordering buffer */
1253         for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1254                 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1255                         /* release the reordered frames */
1256                         dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1257                         sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1258                         sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1259                 }
1260         }
1261         kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1262
1263         sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1264         sta_info_put(sta);
1265 }
1266
1267 /*
1268  * After receiving Block Ack Request (BAR) we activated a
1269  * timer after each frame arrives from the originator.
1270  * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1271  */
1272 void sta_rx_agg_session_timer_expired(unsigned long data)
1273 {
1274         /* not an elegant detour, but there is no choice as the timer passes
1275          * only one argument, and verious sta_info are needed here, so init
1276          * flow in sta_info_add gives the TID as data, while the timer_to_id
1277          * array gives the sta through container_of */
1278         u8 *ptid = (u8 *)data;
1279         u8 *timer_to_id = ptid - *ptid;
1280         struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1281                                          timer_to_tid[0]);
1282
1283         printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1284         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1285                                          WLAN_BACK_TIMER,
1286                                          WLAN_REASON_QSTA_TIMEOUT);
1287 }
1288
1289
1290 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1291                                    struct ieee80211_if_sta *ifsta,
1292                                    struct ieee80211_mgmt *mgmt,
1293                                    size_t len)
1294 {
1295         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1296         u16 auth_alg, auth_transaction, status_code;
1297         DECLARE_MAC_BUF(mac);
1298
1299         if (ifsta->state != IEEE80211_AUTHENTICATE &&
1300             sdata->type != IEEE80211_IF_TYPE_IBSS) {
1301                 printk(KERN_DEBUG "%s: authentication frame received from "
1302                        "%s, but not in authenticate state - ignored\n",
1303                        dev->name, print_mac(mac, mgmt->sa));
1304                 return;
1305         }
1306
1307         if (len < 24 + 6) {
1308                 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1309                        "received from %s - ignored\n",
1310                        dev->name, len, print_mac(mac, mgmt->sa));
1311                 return;
1312         }
1313
1314         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1315             memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1316                 printk(KERN_DEBUG "%s: authentication frame received from "
1317                        "unknown AP (SA=%s BSSID=%s) - "
1318                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1319                        print_mac(mac, mgmt->bssid));
1320                 return;
1321         }
1322
1323         if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1324             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1325                 printk(KERN_DEBUG "%s: authentication frame received from "
1326                        "unknown BSSID (SA=%s BSSID=%s) - "
1327                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1328                        print_mac(mac, mgmt->bssid));
1329                 return;
1330         }
1331
1332         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1333         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1334         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1335
1336         printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1337                "transaction=%d status=%d)\n",
1338                dev->name, print_mac(mac, mgmt->sa), auth_alg,
1339                auth_transaction, status_code);
1340
1341         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
1342                 /* IEEE 802.11 standard does not require authentication in IBSS
1343                  * networks and most implementations do not seem to use it.
1344                  * However, try to reply to authentication attempts if someone
1345                  * has actually implemented this.
1346                  * TODO: Could implement shared key authentication. */
1347                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1348                         printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1349                                "frame (alg=%d transaction=%d)\n",
1350                                dev->name, auth_alg, auth_transaction);
1351                         return;
1352                 }
1353                 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1354         }
1355
1356         if (auth_alg != ifsta->auth_alg ||
1357             auth_transaction != ifsta->auth_transaction) {
1358                 printk(KERN_DEBUG "%s: unexpected authentication frame "
1359                        "(alg=%d transaction=%d)\n",
1360                        dev->name, auth_alg, auth_transaction);
1361                 return;
1362         }
1363
1364         if (status_code != WLAN_STATUS_SUCCESS) {
1365                 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1366                        "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1367                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1368                         u8 algs[3];
1369                         const int num_algs = ARRAY_SIZE(algs);
1370                         int i, pos;
1371                         algs[0] = algs[1] = algs[2] = 0xff;
1372                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1373                                 algs[0] = WLAN_AUTH_OPEN;
1374                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1375                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1376                         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1377                                 algs[2] = WLAN_AUTH_LEAP;
1378                         if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1379                                 pos = 0;
1380                         else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1381                                 pos = 1;
1382                         else
1383                                 pos = 2;
1384                         for (i = 0; i < num_algs; i++) {
1385                                 pos++;
1386                                 if (pos >= num_algs)
1387                                         pos = 0;
1388                                 if (algs[pos] == ifsta->auth_alg ||
1389                                     algs[pos] == 0xff)
1390                                         continue;
1391                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1392                                     !ieee80211_sta_wep_configured(dev))
1393                                         continue;
1394                                 ifsta->auth_alg = algs[pos];
1395                                 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1396                                        "next try\n",
1397                                        dev->name, ifsta->auth_alg);
1398                                 break;
1399                         }
1400                 }
1401                 return;
1402         }
1403
1404         switch (ifsta->auth_alg) {
1405         case WLAN_AUTH_OPEN:
1406         case WLAN_AUTH_LEAP:
1407                 ieee80211_auth_completed(dev, ifsta);
1408                 break;
1409         case WLAN_AUTH_SHARED_KEY:
1410                 if (ifsta->auth_transaction == 4)
1411                         ieee80211_auth_completed(dev, ifsta);
1412                 else
1413                         ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1414                 break;
1415         }
1416 }
1417
1418
1419 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1420                                      struct ieee80211_if_sta *ifsta,
1421                                      struct ieee80211_mgmt *mgmt,
1422                                      size_t len)
1423 {
1424         u16 reason_code;
1425         DECLARE_MAC_BUF(mac);
1426
1427         if (len < 24 + 2) {
1428                 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1429                        "received from %s - ignored\n",
1430                        dev->name, len, print_mac(mac, mgmt->sa));
1431                 return;
1432         }
1433
1434         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1435                 printk(KERN_DEBUG "%s: deauthentication frame received from "
1436                        "unknown AP (SA=%s BSSID=%s) - "
1437                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1438                        print_mac(mac, mgmt->bssid));
1439                 return;
1440         }
1441
1442         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1443
1444         printk(KERN_DEBUG "%s: RX deauthentication from %s"
1445                " (reason=%d)\n",
1446                dev->name, print_mac(mac, mgmt->sa), reason_code);
1447
1448         if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1449                 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1450         }
1451
1452         if (ifsta->state == IEEE80211_AUTHENTICATE ||
1453             ifsta->state == IEEE80211_ASSOCIATE ||
1454             ifsta->state == IEEE80211_ASSOCIATED) {
1455                 ifsta->state = IEEE80211_AUTHENTICATE;
1456                 mod_timer(&ifsta->timer, jiffies +
1457                                       IEEE80211_RETRY_AUTH_INTERVAL);
1458         }
1459
1460         ieee80211_set_disassoc(dev, ifsta, 1);
1461         ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1462 }
1463
1464
1465 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1466                                        struct ieee80211_if_sta *ifsta,
1467                                        struct ieee80211_mgmt *mgmt,
1468                                        size_t len)
1469 {
1470         u16 reason_code;
1471         DECLARE_MAC_BUF(mac);
1472
1473         if (len < 24 + 2) {
1474                 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1475                        "received from %s - ignored\n",
1476                        dev->name, len, print_mac(mac, mgmt->sa));
1477                 return;
1478         }
1479
1480         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1481                 printk(KERN_DEBUG "%s: disassociation frame received from "
1482                        "unknown AP (SA=%s BSSID=%s) - "
1483                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1484                        print_mac(mac, mgmt->bssid));
1485                 return;
1486         }
1487
1488         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1489
1490         printk(KERN_DEBUG "%s: RX disassociation from %s"
1491                " (reason=%d)\n",
1492                dev->name, print_mac(mac, mgmt->sa), reason_code);
1493
1494         if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1495                 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1496
1497         if (ifsta->state == IEEE80211_ASSOCIATED) {
1498                 ifsta->state = IEEE80211_ASSOCIATE;
1499                 mod_timer(&ifsta->timer, jiffies +
1500                                       IEEE80211_RETRY_AUTH_INTERVAL);
1501         }
1502
1503         ieee80211_set_disassoc(dev, ifsta, 0);
1504 }
1505
1506
1507 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1508                                          struct ieee80211_if_sta *ifsta,
1509                                          struct ieee80211_mgmt *mgmt,
1510                                          size_t len,
1511                                          int reassoc)
1512 {
1513         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1514         struct ieee80211_hw_mode *mode;
1515         struct sta_info *sta;
1516         u32 rates;
1517         u16 capab_info, status_code, aid;
1518         struct ieee802_11_elems elems;
1519         u8 *pos;
1520         int i, j;
1521         DECLARE_MAC_BUF(mac);
1522
1523         /* AssocResp and ReassocResp have identical structure, so process both
1524          * of them in this function. */
1525
1526         if (ifsta->state != IEEE80211_ASSOCIATE) {
1527                 printk(KERN_DEBUG "%s: association frame received from "
1528                        "%s, but not in associate state - ignored\n",
1529                        dev->name, print_mac(mac, mgmt->sa));
1530                 return;
1531         }
1532
1533         if (len < 24 + 6) {
1534                 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1535                        "received from %s - ignored\n",
1536                        dev->name, len, print_mac(mac, mgmt->sa));
1537                 return;
1538         }
1539
1540         if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1541                 printk(KERN_DEBUG "%s: association frame received from "
1542                        "unknown AP (SA=%s BSSID=%s) - "
1543                        "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1544                        print_mac(mac, mgmt->bssid));
1545                 return;
1546         }
1547
1548         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1549         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1550         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1551
1552         printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1553                "status=%d aid=%d)\n",
1554                dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1555                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1556
1557         if (status_code != WLAN_STATUS_SUCCESS) {
1558                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1559                        dev->name, status_code);
1560                 /* if this was a reassociation, ensure we try a "full"
1561                  * association next time. This works around some broken APs
1562                  * which do not correctly reject reassociation requests. */
1563                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1564                 return;
1565         }
1566
1567         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1568                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1569                        "set\n", dev->name, aid);
1570         aid &= ~(BIT(15) | BIT(14));
1571
1572         pos = mgmt->u.assoc_resp.variable;
1573         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1574
1575         if (!elems.supp_rates) {
1576                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1577                        dev->name);
1578                 return;
1579         }
1580
1581         printk(KERN_DEBUG "%s: associated\n", dev->name);
1582         ifsta->aid = aid;
1583         ifsta->ap_capab = capab_info;
1584
1585         kfree(ifsta->assocresp_ies);
1586         ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1587         ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1588         if (ifsta->assocresp_ies)
1589                 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1590
1591         ieee80211_set_associated(dev, ifsta, 1);
1592
1593         /* Add STA entry for the AP */
1594         sta = sta_info_get(local, ifsta->bssid);
1595         if (!sta) {
1596                 struct ieee80211_sta_bss *bss;
1597                 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1598                 if (!sta) {
1599                         printk(KERN_DEBUG "%s: failed to add STA entry for the"
1600                                " AP\n", dev->name);
1601                         return;
1602                 }
1603                 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1604                                            local->hw.conf.channel,
1605                                            ifsta->ssid, ifsta->ssid_len);
1606                 if (bss) {
1607                         sta->last_rssi = bss->rssi;
1608                         sta->last_signal = bss->signal;
1609                         sta->last_noise = bss->noise;
1610                         ieee80211_rx_bss_put(dev, bss);
1611                 }
1612         }
1613
1614         sta->dev = dev;
1615         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1616
1617         rates = 0;
1618         mode = local->oper_hw_mode;
1619         for (i = 0; i < elems.supp_rates_len; i++) {
1620                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1621                 for (j = 0; j < mode->num_rates; j++)
1622                         if (mode->rates[j].rate == rate)
1623                                 rates |= BIT(j);
1624         }
1625         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1626                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1627                 for (j = 0; j < mode->num_rates; j++)
1628                         if (mode->rates[j].rate == rate)
1629                                 rates |= BIT(j);
1630         }
1631         sta->supp_rates = rates;
1632
1633         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1634             local->ops->conf_ht) {
1635                 struct ieee80211_ht_bss_info bss_info;
1636
1637                 ieee80211_ht_cap_ie_to_ht_info(
1638                                 (struct ieee80211_ht_cap *)
1639                                 elems.ht_cap_elem, &sta->ht_info);
1640                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1641                                 (struct ieee80211_ht_addt_info *)
1642                                 elems.ht_info_elem, &bss_info);
1643                 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1644         }
1645
1646         rate_control_rate_init(sta, local);
1647
1648         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1649                 sta->flags |= WLAN_STA_WME;
1650                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1651                                          elems.wmm_param_len);
1652         }
1653
1654
1655         sta_info_put(sta);
1656
1657         ieee80211_associated(dev, ifsta);
1658 }
1659
1660
1661 /* Caller must hold local->sta_bss_lock */
1662 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1663                                         struct ieee80211_sta_bss *bss)
1664 {
1665         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1666         bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1667         local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1668 }
1669
1670
1671 /* Caller must hold local->sta_bss_lock */
1672 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1673                                         struct ieee80211_sta_bss *bss)
1674 {
1675         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1676         struct ieee80211_sta_bss *b, *prev = NULL;
1677         b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1678         while (b) {
1679                 if (b == bss) {
1680                         if (!prev)
1681                                 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1682                                         bss->hnext;
1683                         else
1684                                 prev->hnext = bss->hnext;
1685                         break;
1686                 }
1687                 prev = b;
1688                 b = b->hnext;
1689         }
1690 }
1691
1692
1693 static struct ieee80211_sta_bss *
1694 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1695                      u8 *ssid, u8 ssid_len)
1696 {
1697         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1698         struct ieee80211_sta_bss *bss;
1699
1700         bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1701         if (!bss)
1702                 return NULL;
1703         atomic_inc(&bss->users);
1704         atomic_inc(&bss->users);
1705         memcpy(bss->bssid, bssid, ETH_ALEN);
1706         bss->channel = channel;
1707         if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1708                 memcpy(bss->ssid, ssid, ssid_len);
1709                 bss->ssid_len = ssid_len;
1710         }
1711
1712         spin_lock_bh(&local->sta_bss_lock);
1713         /* TODO: order by RSSI? */
1714         list_add_tail(&bss->list, &local->sta_bss_list);
1715         __ieee80211_rx_bss_hash_add(dev, bss);
1716         spin_unlock_bh(&local->sta_bss_lock);
1717         return bss;
1718 }
1719
1720
1721 static struct ieee80211_sta_bss *
1722 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1723                      u8 *ssid, u8 ssid_len)
1724 {
1725         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1726         struct ieee80211_sta_bss *bss;
1727
1728         spin_lock_bh(&local->sta_bss_lock);
1729         bss = local->sta_bss_hash[STA_HASH(bssid)];
1730         while (bss) {
1731                 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1732                     bss->channel == channel &&
1733                     bss->ssid_len == ssid_len &&
1734                     (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1735                         atomic_inc(&bss->users);
1736                         break;
1737                 }
1738                 bss = bss->hnext;
1739         }
1740         spin_unlock_bh(&local->sta_bss_lock);
1741         return bss;
1742 }
1743
1744
1745 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1746 {
1747         kfree(bss->wpa_ie);
1748         kfree(bss->rsn_ie);
1749         kfree(bss->wmm_ie);
1750         kfree(bss->ht_ie);
1751         kfree(bss);
1752 }
1753
1754
1755 static void ieee80211_rx_bss_put(struct net_device *dev,
1756                                  struct ieee80211_sta_bss *bss)
1757 {
1758         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1759         if (!atomic_dec_and_test(&bss->users))
1760                 return;
1761
1762         spin_lock_bh(&local->sta_bss_lock);
1763         __ieee80211_rx_bss_hash_del(dev, bss);
1764         list_del(&bss->list);
1765         spin_unlock_bh(&local->sta_bss_lock);
1766         ieee80211_rx_bss_free(bss);
1767 }
1768
1769
1770 void ieee80211_rx_bss_list_init(struct net_device *dev)
1771 {
1772         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1773         spin_lock_init(&local->sta_bss_lock);
1774         INIT_LIST_HEAD(&local->sta_bss_list);
1775 }
1776
1777
1778 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1779 {
1780         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1781         struct ieee80211_sta_bss *bss, *tmp;
1782
1783         list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1784                 ieee80211_rx_bss_put(dev, bss);
1785 }
1786
1787
1788 static void ieee80211_rx_bss_info(struct net_device *dev,
1789                                   struct ieee80211_mgmt *mgmt,
1790                                   size_t len,
1791                                   struct ieee80211_rx_status *rx_status,
1792                                   int beacon)
1793 {
1794         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1795         struct ieee802_11_elems elems;
1796         size_t baselen;
1797         int channel, clen;
1798         struct ieee80211_sta_bss *bss;
1799         struct sta_info *sta;
1800         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1801         u64 timestamp;
1802         DECLARE_MAC_BUF(mac);
1803         DECLARE_MAC_BUF(mac2);
1804
1805         if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1806                 return; /* ignore ProbeResp to foreign address */
1807
1808 #if 0
1809         printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
1810                dev->name, beacon ? "Beacon" : "Probe Response",
1811                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
1812 #endif
1813
1814         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1815         if (baselen > len)
1816                 return;
1817
1818         timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1819
1820         if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1821             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1822 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1823                 static unsigned long last_tsf_debug = 0;
1824                 u64 tsf;
1825                 if (local->ops->get_tsf)
1826                         tsf = local->ops->get_tsf(local_to_hw(local));
1827                 else
1828                         tsf = -1LLU;
1829                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1830                         printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1831                                "%s TSF=0x%llx BCN=0x%llx diff=%lld "
1832                                "@%lu\n",
1833                                print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
1834                                (unsigned long long)tsf,
1835                                (unsigned long long)timestamp,
1836                                (unsigned long long)(tsf - timestamp),
1837                                jiffies);
1838                         last_tsf_debug = jiffies;
1839                 }
1840 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1841         }
1842
1843         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1844
1845         if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1846             memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1847             (sta = sta_info_get(local, mgmt->sa))) {
1848                 struct ieee80211_hw_mode *mode;
1849                 struct ieee80211_rate *rates;
1850                 size_t num_rates;
1851                 u32 supp_rates, prev_rates;
1852                 int i, j;
1853
1854                 mode = local->sta_sw_scanning ?
1855                        local->scan_hw_mode : local->oper_hw_mode;
1856
1857                 if (local->sta_hw_scanning) {
1858                         /* search for the correct mode matches the beacon */
1859                         list_for_each_entry(mode, &local->modes_list, list)
1860                                 if (mode->mode == rx_status->phymode)
1861                                         break;
1862
1863                         if (mode == NULL)
1864                                 mode = local->oper_hw_mode;
1865                 }
1866                 rates = mode->rates;
1867                 num_rates = mode->num_rates;
1868
1869                 supp_rates = 0;
1870                 for (i = 0; i < elems.supp_rates_len +
1871                              elems.ext_supp_rates_len; i++) {
1872                         u8 rate = 0;
1873                         int own_rate;
1874                         if (i < elems.supp_rates_len)
1875                                 rate = elems.supp_rates[i];
1876                         else if (elems.ext_supp_rates)
1877                                 rate = elems.ext_supp_rates
1878                                         [i - elems.supp_rates_len];
1879                         own_rate = 5 * (rate & 0x7f);
1880                         for (j = 0; j < num_rates; j++)
1881                                 if (rates[j].rate == own_rate)
1882                                         supp_rates |= BIT(j);
1883                 }
1884
1885                 prev_rates = sta->supp_rates;
1886                 sta->supp_rates &= supp_rates;
1887                 if (sta->supp_rates == 0) {
1888                         /* No matching rates - this should not really happen.
1889                          * Make sure that at least one rate is marked
1890                          * supported to avoid issues with TX rate ctrl. */
1891                         sta->supp_rates = sdata->u.sta.supp_rates_bits;
1892                 }
1893                 if (sta->supp_rates != prev_rates) {
1894                         printk(KERN_DEBUG "%s: updated supp_rates set for "
1895                                "%s based on beacon info (0x%x & 0x%x -> "
1896                                "0x%x)\n",
1897                                dev->name, print_mac(mac, sta->addr), prev_rates,
1898                                supp_rates, sta->supp_rates);
1899                 }
1900                 sta_info_put(sta);
1901         }
1902
1903         if (!elems.ssid)
1904                 return;
1905
1906         if (elems.ds_params && elems.ds_params_len == 1)
1907                 channel = elems.ds_params[0];
1908         else
1909                 channel = rx_status->channel;
1910
1911         bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1912                                    elems.ssid, elems.ssid_len);
1913         if (!bss) {
1914                 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1915                                            elems.ssid, elems.ssid_len);
1916                 if (!bss)
1917                         return;
1918         } else {
1919 #if 0
1920                 /* TODO: order by RSSI? */
1921                 spin_lock_bh(&local->sta_bss_lock);
1922                 list_move_tail(&bss->list, &local->sta_bss_list);
1923                 spin_unlock_bh(&local->sta_bss_lock);
1924 #endif
1925         }
1926
1927         if (bss->probe_resp && beacon) {
1928                 /* Do not allow beacon to override data from Probe Response. */
1929                 ieee80211_rx_bss_put(dev, bss);
1930                 return;
1931         }
1932
1933         /* save the ERP value so that it is available at association time */
1934         if (elems.erp_info && elems.erp_info_len >= 1) {
1935                 bss->erp_value = elems.erp_info[0];
1936                 bss->has_erp_value = 1;
1937         }
1938
1939         bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1940         bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1941
1942         bss->supp_rates_len = 0;
1943         if (elems.supp_rates) {
1944                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1945                 if (clen > elems.supp_rates_len)
1946                         clen = elems.supp_rates_len;
1947                 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1948                        clen);
1949                 bss->supp_rates_len += clen;
1950         }
1951         if (elems.ext_supp_rates) {
1952                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1953                 if (clen > elems.ext_supp_rates_len)
1954                         clen = elems.ext_supp_rates_len;
1955                 memcpy(&bss->supp_rates[bss->supp_rates_len],
1956                        elems.ext_supp_rates, clen);
1957                 bss->supp_rates_len += clen;
1958         }
1959
1960         if (elems.wpa &&
1961             (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1962              memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1963                 kfree(bss->wpa_ie);
1964                 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1965                 if (bss->wpa_ie) {
1966                         memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1967                         bss->wpa_ie_len = elems.wpa_len + 2;
1968                 } else
1969                         bss->wpa_ie_len = 0;
1970         } else if (!elems.wpa && bss->wpa_ie) {
1971                 kfree(bss->wpa_ie);
1972                 bss->wpa_ie = NULL;
1973                 bss->wpa_ie_len = 0;
1974         }
1975
1976         if (elems.rsn &&
1977             (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1978              memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1979                 kfree(bss->rsn_ie);
1980                 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1981                 if (bss->rsn_ie) {
1982                         memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1983                         bss->rsn_ie_len = elems.rsn_len + 2;
1984                 } else
1985                         bss->rsn_ie_len = 0;
1986         } else if (!elems.rsn && bss->rsn_ie) {
1987                 kfree(bss->rsn_ie);
1988                 bss->rsn_ie = NULL;
1989                 bss->rsn_ie_len = 0;
1990         }
1991
1992         if (elems.wmm_param &&
1993             (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1994              memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1995                 kfree(bss->wmm_ie);
1996                 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1997                 if (bss->wmm_ie) {
1998                         memcpy(bss->wmm_ie, elems.wmm_param - 2,
1999                                elems.wmm_param_len + 2);
2000                         bss->wmm_ie_len = elems.wmm_param_len + 2;
2001                 } else
2002                         bss->wmm_ie_len = 0;
2003         } else if (!elems.wmm_param && bss->wmm_ie) {
2004                 kfree(bss->wmm_ie);
2005                 bss->wmm_ie = NULL;
2006                 bss->wmm_ie_len = 0;
2007         }
2008         if (elems.ht_cap_elem &&
2009             (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2010              memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2011                 kfree(bss->ht_ie);
2012                 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2013                 if (bss->ht_ie) {
2014                         memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2015                                elems.ht_cap_elem_len + 2);
2016                         bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2017                 } else
2018                         bss->ht_ie_len = 0;
2019         } else if (!elems.ht_cap_elem && bss->ht_ie) {
2020                 kfree(bss->ht_ie);
2021                 bss->ht_ie = NULL;
2022                 bss->ht_ie_len = 0;
2023         }
2024
2025         bss->hw_mode = rx_status->phymode;
2026         bss->freq = rx_status->freq;
2027         if (channel != rx_status->channel &&
2028             (bss->hw_mode == MODE_IEEE80211G ||
2029              bss->hw_mode == MODE_IEEE80211B) &&
2030             channel >= 1 && channel <= 14) {
2031                 static const int freq_list[] = {
2032                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
2033                         2447, 2452, 2457, 2462, 2467, 2472, 2484
2034                 };
2035                 /* IEEE 802.11g/b mode can receive packets from neighboring
2036                  * channels, so map the channel into frequency. */
2037                 bss->freq = freq_list[channel - 1];
2038         }
2039         bss->timestamp = timestamp;
2040         bss->last_update = jiffies;
2041         bss->rssi = rx_status->ssi;
2042         bss->signal = rx_status->signal;
2043         bss->noise = rx_status->noise;
2044         if (!beacon)
2045                 bss->probe_resp++;
2046         ieee80211_rx_bss_put(dev, bss);
2047 }
2048
2049
2050 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2051                                          struct ieee80211_mgmt *mgmt,
2052                                          size_t len,
2053                                          struct ieee80211_rx_status *rx_status)
2054 {
2055         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2056 }
2057
2058
2059 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2060                                      struct ieee80211_mgmt *mgmt,
2061                                      size_t len,
2062                                      struct ieee80211_rx_status *rx_status)
2063 {
2064         struct ieee80211_sub_if_data *sdata;
2065         struct ieee80211_if_sta *ifsta;
2066         size_t baselen;
2067         struct ieee802_11_elems elems;
2068         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2069         struct ieee80211_conf *conf = &local->hw.conf;
2070
2071         ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2072
2073         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2074         if (sdata->type != IEEE80211_IF_TYPE_STA)
2075                 return;
2076         ifsta = &sdata->u.sta;
2077
2078         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2079             memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2080                 return;
2081
2082         /* Process beacon from the current BSS */
2083         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2084         if (baselen > len)
2085                 return;
2086
2087         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2088
2089         if (elems.erp_info && elems.erp_info_len >= 1)
2090                 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
2091
2092         if (elems.ht_cap_elem && elems.ht_info_elem &&
2093             elems.wmm_param && local->ops->conf_ht &&
2094             conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2095                 struct ieee80211_ht_bss_info bss_info;
2096
2097                 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2098                                 (struct ieee80211_ht_addt_info *)
2099                                 elems.ht_info_elem, &bss_info);
2100                 /* check if AP changed bss inforamation */
2101                 if ((conf->ht_bss_conf.primary_channel !=
2102                      bss_info.primary_channel) ||
2103                     (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2104                     (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2105                         ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2106                                                 &bss_info);
2107         }
2108
2109         if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2110                 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2111                                          elems.wmm_param_len);
2112         }
2113 }
2114
2115
2116 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2117                                         struct ieee80211_if_sta *ifsta,
2118                                         struct ieee80211_mgmt *mgmt,
2119                                         size_t len,
2120                                         struct ieee80211_rx_status *rx_status)
2121 {
2122         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2123         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2124         int tx_last_beacon;
2125         struct sk_buff *skb;
2126         struct ieee80211_mgmt *resp;
2127         u8 *pos, *end;
2128         DECLARE_MAC_BUF(mac);
2129 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2130         DECLARE_MAC_BUF(mac2);
2131         DECLARE_MAC_BUF(mac3);
2132 #endif
2133
2134         if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
2135             ifsta->state != IEEE80211_IBSS_JOINED ||
2136             len < 24 + 2 || !ifsta->probe_resp)
2137                 return;
2138
2139         if (local->ops->tx_last_beacon)
2140                 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2141         else
2142                 tx_last_beacon = 1;
2143
2144 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2145         printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2146                "%s (tx_last_beacon=%d)\n",
2147                dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2148                print_mac(mac3, mgmt->bssid), tx_last_beacon);
2149 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2150
2151         if (!tx_last_beacon)
2152                 return;
2153
2154         if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2155             memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2156                 return;
2157
2158         end = ((u8 *) mgmt) + len;
2159         pos = mgmt->u.probe_req.variable;
2160         if (pos[0] != WLAN_EID_SSID ||
2161             pos + 2 + pos[1] > end) {
2162                 if (net_ratelimit()) {
2163                         printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2164                                "from %s\n",
2165                                dev->name, print_mac(mac, mgmt->sa));
2166                 }
2167                 return;
2168         }
2169         if (pos[1] != 0 &&
2170             (pos[1] != ifsta->ssid_len ||
2171              memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2172                 /* Ignore ProbeReq for foreign SSID */
2173                 return;
2174         }
2175
2176         /* Reply with ProbeResp */
2177         skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2178         if (!skb)
2179                 return;
2180
2181         resp = (struct ieee80211_mgmt *) skb->data;
2182         memcpy(resp->da, mgmt->sa, ETH_ALEN);
2183 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2184         printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2185                dev->name, print_mac(mac, resp->da));
2186 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2187         ieee80211_sta_tx(dev, skb, 0);
2188 }
2189
2190 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2191                                      struct ieee80211_if_sta *ifsta,
2192                                      struct ieee80211_mgmt *mgmt,
2193                                      size_t len)
2194 {
2195         if (len < IEEE80211_MIN_ACTION_SIZE)
2196                 return;
2197
2198         switch (mgmt->u.action.category) {
2199         case WLAN_CATEGORY_BACK:
2200                 switch (mgmt->u.action.u.addba_req.action_code) {
2201                 case WLAN_ACTION_ADDBA_REQ:
2202                         if (len < (IEEE80211_MIN_ACTION_SIZE +
2203                                    sizeof(mgmt->u.action.u.addba_req)))
2204                                 break;
2205                         ieee80211_sta_process_addba_request(dev, mgmt, len);
2206                         break;
2207                 default:
2208                         if (net_ratelimit())
2209                            printk(KERN_DEBUG "%s: received unsupported BACK\n",
2210                                         dev->name);
2211                         break;
2212                 }
2213                 break;
2214         default:
2215                 break;
2216         }
2217 }
2218
2219 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2220                            struct ieee80211_rx_status *rx_status)
2221 {
2222         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2223         struct ieee80211_sub_if_data *sdata;
2224         struct ieee80211_if_sta *ifsta;
2225         struct ieee80211_mgmt *mgmt;
2226         u16 fc;
2227
2228         if (skb->len < 24)
2229                 goto fail;
2230
2231         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2232         ifsta = &sdata->u.sta;
2233
2234         mgmt = (struct ieee80211_mgmt *) skb->data;
2235         fc = le16_to_cpu(mgmt->frame_control);
2236
2237         switch (fc & IEEE80211_FCTL_STYPE) {
2238         case IEEE80211_STYPE_PROBE_REQ:
2239         case IEEE80211_STYPE_PROBE_RESP:
2240         case IEEE80211_STYPE_BEACON:
2241                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2242         case IEEE80211_STYPE_AUTH:
2243         case IEEE80211_STYPE_ASSOC_RESP:
2244         case IEEE80211_STYPE_REASSOC_RESP:
2245         case IEEE80211_STYPE_DEAUTH:
2246         case IEEE80211_STYPE_DISASSOC:
2247         case IEEE80211_STYPE_ACTION:
2248                 skb_queue_tail(&ifsta->skb_queue, skb);
2249                 queue_work(local->hw.workqueue, &ifsta->work);
2250                 return;
2251         default:
2252                 printk(KERN_DEBUG "%s: received unknown management frame - "
2253                        "stype=%d\n", dev->name,
2254                        (fc & IEEE80211_FCTL_STYPE) >> 4);
2255                 break;
2256         }
2257
2258  fail:
2259         kfree_skb(skb);
2260 }
2261
2262
2263 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2264                                          struct sk_buff *skb)
2265 {
2266         struct ieee80211_rx_status *rx_status;
2267         struct ieee80211_sub_if_data *sdata;
2268         struct ieee80211_if_sta *ifsta;
2269         struct ieee80211_mgmt *mgmt;
2270         u16 fc;
2271
2272         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2273         ifsta = &sdata->u.sta;
2274
2275         rx_status = (struct ieee80211_rx_status *) skb->cb;
2276         mgmt = (struct ieee80211_mgmt *) skb->data;
2277         fc = le16_to_cpu(mgmt->frame_control);
2278
2279         switch (fc & IEEE80211_FCTL_STYPE) {
2280         case IEEE80211_STYPE_PROBE_REQ:
2281                 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2282                                             rx_status);
2283                 break;
2284         case IEEE80211_STYPE_PROBE_RESP:
2285                 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2286                 break;
2287         case IEEE80211_STYPE_BEACON:
2288                 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2289                 break;
2290         case IEEE80211_STYPE_AUTH:
2291                 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2292                 break;
2293         case IEEE80211_STYPE_ASSOC_RESP:
2294                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
2295                 break;
2296         case IEEE80211_STYPE_REASSOC_RESP:
2297                 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
2298                 break;
2299         case IEEE80211_STYPE_DEAUTH:
2300                 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2301                 break;
2302         case IEEE80211_STYPE_DISASSOC:
2303                 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2304                 break;
2305         case IEEE80211_STYPE_ACTION:
2306                 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2307                 break;
2308         }
2309
2310         kfree_skb(skb);
2311 }
2312
2313
2314 ieee80211_txrx_result
2315 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2316                       struct ieee80211_rx_status *rx_status)
2317 {
2318         struct ieee80211_mgmt *mgmt;
2319         u16 fc;
2320
2321         if (skb->len < 2)
2322                 return TXRX_DROP;
2323
2324         mgmt = (struct ieee80211_mgmt *) skb->data;
2325         fc = le16_to_cpu(mgmt->frame_control);
2326
2327         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2328                 return TXRX_CONTINUE;
2329
2330         if (skb->len < 24)
2331                 return TXRX_DROP;
2332
2333         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2334                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2335                         ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2336                                                      skb->len, rx_status);
2337                         dev_kfree_skb(skb);
2338                         return TXRX_QUEUED;
2339                 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2340                         ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2341                                                  rx_status);
2342                         dev_kfree_skb(skb);
2343                         return TXRX_QUEUED;
2344                 }
2345         }
2346         return TXRX_CONTINUE;
2347 }
2348
2349
2350 static int ieee80211_sta_active_ibss(struct net_device *dev)
2351 {
2352         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2353         int active = 0;
2354         struct sta_info *sta;
2355
2356         read_lock_bh(&local->sta_lock);
2357         list_for_each_entry(sta, &local->sta_list, list) {
2358                 if (sta->dev == dev &&
2359                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2360                                jiffies)) {
2361                         active++;
2362                         break;
2363                 }
2364         }
2365         read_unlock_bh(&local->sta_lock);
2366
2367         return active;
2368 }
2369
2370
2371 static void ieee80211_sta_expire(struct net_device *dev)
2372 {
2373         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2374         struct sta_info *sta, *tmp;
2375         LIST_HEAD(tmp_list);
2376         DECLARE_MAC_BUF(mac);
2377
2378         write_lock_bh(&local->sta_lock);
2379         list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2380                 if (time_after(jiffies, sta->last_rx +
2381                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2382                         printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2383                                dev->name, print_mac(mac, sta->addr));
2384                         __sta_info_get(sta);
2385                         sta_info_remove(sta);
2386                         list_add(&sta->list, &tmp_list);
2387                 }
2388         write_unlock_bh(&local->sta_lock);
2389
2390         list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2391                 sta_info_free(sta);
2392                 sta_info_put(sta);
2393         }
2394 }
2395
2396
2397 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2398                                      struct ieee80211_if_sta *ifsta)
2399 {
2400         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2401
2402         ieee80211_sta_expire(dev);
2403         if (ieee80211_sta_active_ibss(dev))
2404                 return;
2405
2406         printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2407                "IBSS networks with same SSID (merge)\n", dev->name);
2408         ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2409 }
2410
2411
2412 void ieee80211_sta_timer(unsigned long data)
2413 {
2414         struct ieee80211_sub_if_data *sdata =
2415                 (struct ieee80211_sub_if_data *) data;
2416         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2417         struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2418
2419         set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2420         queue_work(local->hw.workqueue, &ifsta->work);
2421 }
2422
2423
2424 void ieee80211_sta_work(struct work_struct *work)
2425 {
2426         struct ieee80211_sub_if_data *sdata =
2427                 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2428         struct net_device *dev = sdata->dev;
2429         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2430         struct ieee80211_if_sta *ifsta;
2431         struct sk_buff *skb;
2432
2433         if (!netif_running(dev))
2434                 return;
2435
2436         if (local->sta_sw_scanning || local->sta_hw_scanning)
2437                 return;
2438
2439         if (sdata->type != IEEE80211_IF_TYPE_STA &&
2440             sdata->type != IEEE80211_IF_TYPE_IBSS) {
2441                 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2442                        "(type=%d)\n", dev->name, sdata->type);
2443                 return;
2444         }
2445         ifsta = &sdata->u.sta;
2446
2447         while ((skb = skb_dequeue(&ifsta->skb_queue)))
2448                 ieee80211_sta_rx_queued_mgmt(dev, skb);
2449
2450         if (ifsta->state != IEEE80211_AUTHENTICATE &&
2451             ifsta->state != IEEE80211_ASSOCIATE &&
2452             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2453                 if (ifsta->scan_ssid_len)
2454                         ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2455                 else
2456                         ieee80211_sta_start_scan(dev, NULL, 0);
2457                 return;
2458         }
2459
2460         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2461                 if (ieee80211_sta_config_auth(dev, ifsta))
2462                         return;
2463                 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2464         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2465                 return;
2466
2467         switch (ifsta->state) {
2468         case IEEE80211_DISABLED:
2469                 break;
2470         case IEEE80211_AUTHENTICATE:
2471                 ieee80211_authenticate(dev, ifsta);
2472                 break;
2473         case IEEE80211_ASSOCIATE:
2474                 ieee80211_associate(dev, ifsta);
2475                 break;
2476         case IEEE80211_ASSOCIATED:
2477                 ieee80211_associated(dev, ifsta);
2478                 break;
2479         case IEEE80211_IBSS_SEARCH:
2480                 ieee80211_sta_find_ibss(dev, ifsta);
2481                 break;
2482         case IEEE80211_IBSS_JOINED:
2483                 ieee80211_sta_merge_ibss(dev, ifsta);
2484                 break;
2485         default:
2486                 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2487                        ifsta->state);
2488                 break;
2489         }
2490
2491         if (ieee80211_privacy_mismatch(dev, ifsta)) {
2492                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2493                        "mixed-cell disabled - disassociate\n", dev->name);
2494
2495                 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2496                 ieee80211_set_disassoc(dev, ifsta, 0);
2497         }
2498 }
2499
2500
2501 static void ieee80211_sta_reset_auth(struct net_device *dev,
2502                                      struct ieee80211_if_sta *ifsta)
2503 {
2504         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2505
2506         if (local->ops->reset_tsf) {
2507                 /* Reset own TSF to allow time synchronization work. */
2508                 local->ops->reset_tsf(local_to_hw(local));
2509         }
2510
2511         ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2512
2513
2514         if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2515                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2516         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2517                 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2518         else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2519                 ifsta->auth_alg = WLAN_AUTH_LEAP;
2520         else
2521                 ifsta->auth_alg = WLAN_AUTH_OPEN;
2522         printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2523                ifsta->auth_alg);
2524         ifsta->auth_transaction = -1;
2525         ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2526         ifsta->auth_tries = ifsta->assoc_tries = 0;
2527         netif_carrier_off(dev);
2528 }
2529
2530
2531 void ieee80211_sta_req_auth(struct net_device *dev,
2532                             struct ieee80211_if_sta *ifsta)
2533 {
2534         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2535         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2536
2537         if (sdata->type != IEEE80211_IF_TYPE_STA)
2538                 return;
2539
2540         if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2541                                 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2542             (ifsta->flags & (IEEE80211_STA_SSID_SET |
2543                                 IEEE80211_STA_AUTO_SSID_SEL))) {
2544                 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2545                 queue_work(local->hw.workqueue, &ifsta->work);
2546         }
2547 }
2548
2549 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2550                                     const char *ssid, int ssid_len)
2551 {
2552         int tmp, hidden_ssid;
2553
2554         if (ssid_len == ifsta->ssid_len &&
2555             !memcmp(ifsta->ssid, ssid, ssid_len))
2556                 return 1;
2557
2558         if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2559                 return 0;
2560
2561         hidden_ssid = 1;
2562         tmp = ssid_len;
2563         while (tmp--) {
2564                 if (ssid[tmp] != '\0') {
2565                         hidden_ssid = 0;
2566                         break;
2567                 }
2568         }
2569
2570         if (hidden_ssid && ifsta->ssid_len == ssid_len)
2571                 return 1;
2572
2573         if (ssid_len == 1 && ssid[0] == ' ')
2574                 return 1;
2575
2576         return 0;
2577 }
2578
2579 static int ieee80211_sta_config_auth(struct net_device *dev,
2580                                      struct ieee80211_if_sta *ifsta)
2581 {
2582         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2583         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2584         struct ieee80211_sta_bss *bss, *selected = NULL;
2585         int top_rssi = 0, freq;
2586
2587         if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2588             IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2589                 ifsta->state = IEEE80211_AUTHENTICATE;
2590                 ieee80211_sta_reset_auth(dev, ifsta);
2591                 return 0;
2592         }
2593
2594         spin_lock_bh(&local->sta_bss_lock);
2595         freq = local->oper_channel->freq;
2596         list_for_each_entry(bss, &local->sta_bss_list, list) {
2597                 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2598                         continue;
2599
2600                 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2601                     !!sdata->default_key)
2602                         continue;
2603
2604                 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2605                     bss->freq != freq)
2606                         continue;
2607
2608                 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2609                     memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2610                         continue;
2611
2612                 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2613                     !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2614                         continue;
2615
2616                 if (!selected || top_rssi < bss->rssi) {
2617                         selected = bss;
2618                         top_rssi = bss->rssi;
2619                 }
2620         }
2621         if (selected)
2622                 atomic_inc(&selected->users);
2623         spin_unlock_bh(&local->sta_bss_lock);
2624
2625         if (selected) {
2626                 ieee80211_set_channel(local, -1, selected->freq);
2627                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2628                         ieee80211_sta_set_ssid(dev, selected->ssid,
2629                                                selected->ssid_len);
2630                 ieee80211_sta_set_bssid(dev, selected->bssid);
2631                 ieee80211_rx_bss_put(dev, selected);
2632                 ifsta->state = IEEE80211_AUTHENTICATE;
2633                 ieee80211_sta_reset_auth(dev, ifsta);
2634                 return 0;
2635         } else {
2636                 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2637                         if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2638                                 ieee80211_sta_start_scan(dev, NULL, 0);
2639                         else
2640                                 ieee80211_sta_start_scan(dev, ifsta->ssid,
2641                                                          ifsta->ssid_len);
2642                         ifsta->state = IEEE80211_AUTHENTICATE;
2643                         set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2644                 } else
2645                         ifsta->state = IEEE80211_DISABLED;
2646         }
2647         return -1;
2648 }
2649
2650 static int ieee80211_sta_join_ibss(struct net_device *dev,
2651                                    struct ieee80211_if_sta *ifsta,
2652                                    struct ieee80211_sta_bss *bss)
2653 {
2654         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2655         int res, rates, i, j;
2656         struct sk_buff *skb;
2657         struct ieee80211_mgmt *mgmt;
2658         struct ieee80211_tx_control control;
2659         struct ieee80211_hw_mode *mode;
2660         struct rate_selection ratesel;
2661         u8 *pos;
2662         struct ieee80211_sub_if_data *sdata;
2663
2664         /* Remove possible STA entries from other IBSS networks. */
2665         sta_info_flush(local, NULL);
2666
2667         if (local->ops->reset_tsf) {
2668                 /* Reset own TSF to allow time synchronization work. */
2669                 local->ops->reset_tsf(local_to_hw(local));
2670         }
2671         memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2672         res = ieee80211_if_config(dev);
2673         if (res)
2674                 return res;
2675
2676         local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2677
2678         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2679         sdata->drop_unencrypted = bss->capability &
2680                 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2681
2682         res = ieee80211_set_channel(local, -1, bss->freq);
2683
2684         if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2685                 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2686                        "(%d MHz)\n", dev->name, local->hw.conf.channel,
2687                        local->hw.conf.freq);
2688                 return -1;
2689         }
2690
2691         /* Set beacon template based on scan results */
2692         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2693         do {
2694                 if (!skb)
2695                         break;
2696
2697                 skb_reserve(skb, local->hw.extra_tx_headroom);
2698
2699                 mgmt = (struct ieee80211_mgmt *)
2700                         skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2701                 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2702                 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2703                                                    IEEE80211_STYPE_BEACON);
2704                 memset(mgmt->da, 0xff, ETH_ALEN);
2705                 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2706                 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2707                 mgmt->u.beacon.beacon_int =
2708                         cpu_to_le16(local->hw.conf.beacon_int);
2709                 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2710
2711                 pos = skb_put(skb, 2 + ifsta->ssid_len);
2712                 *pos++ = WLAN_EID_SSID;
2713                 *pos++ = ifsta->ssid_len;
2714                 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2715
2716                 rates = bss->supp_rates_len;
2717                 if (rates > 8)
2718                         rates = 8;
2719                 pos = skb_put(skb, 2 + rates);
2720                 *pos++ = WLAN_EID_SUPP_RATES;
2721                 *pos++ = rates;
2722                 memcpy(pos, bss->supp_rates, rates);
2723
2724                 pos = skb_put(skb, 2 + 1);
2725                 *pos++ = WLAN_EID_DS_PARAMS;
2726                 *pos++ = 1;
2727                 *pos++ = bss->channel;
2728
2729                 pos = skb_put(skb, 2 + 2);
2730                 *pos++ = WLAN_EID_IBSS_PARAMS;
2731                 *pos++ = 2;
2732                 /* FIX: set ATIM window based on scan results */
2733                 *pos++ = 0;
2734                 *pos++ = 0;
2735
2736                 if (bss->supp_rates_len > 8) {
2737                         rates = bss->supp_rates_len - 8;
2738                         pos = skb_put(skb, 2 + rates);
2739                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2740                         *pos++ = rates;
2741                         memcpy(pos, &bss->supp_rates[8], rates);
2742                 }
2743
2744                 memset(&control, 0, sizeof(control));
2745                 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2746                 if (!ratesel.rate) {
2747                         printk(KERN_DEBUG "%s: Failed to determine TX rate "
2748                                "for IBSS beacon\n", dev->name);
2749                         break;
2750                 }
2751                 control.tx_rate =
2752                         ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
2753                         (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2754                         ratesel.rate->val2 : ratesel.rate->val;
2755                 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2756                 control.power_level = local->hw.conf.power_level;
2757                 control.flags |= IEEE80211_TXCTL_NO_ACK;
2758                 control.retry_limit = 1;
2759
2760                 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2761                 if (ifsta->probe_resp) {
2762                         mgmt = (struct ieee80211_mgmt *)
2763                                 ifsta->probe_resp->data;
2764                         mgmt->frame_control =
2765                                 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2766                                              IEEE80211_STYPE_PROBE_RESP);
2767                 } else {
2768                         printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2769                                "template for IBSS\n", dev->name);
2770                 }
2771
2772                 if (local->ops->beacon_update &&
2773                     local->ops->beacon_update(local_to_hw(local),
2774                                              skb, &control) == 0) {
2775                         printk(KERN_DEBUG "%s: Configured IBSS beacon "
2776                                "template based on scan results\n", dev->name);
2777                         skb = NULL;
2778                 }
2779
2780                 rates = 0;
2781                 mode = local->oper_hw_mode;
2782                 for (i = 0; i < bss->supp_rates_len; i++) {
2783                         int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2784                         for (j = 0; j < mode->num_rates; j++)
2785                                 if (mode->rates[j].rate == bitrate)
2786                                         rates |= BIT(j);
2787                 }
2788                 ifsta->supp_rates_bits = rates;
2789         } while (0);
2790
2791         if (skb) {
2792                 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2793                        "template\n", dev->name);
2794                 dev_kfree_skb(skb);
2795         }
2796
2797         ifsta->state = IEEE80211_IBSS_JOINED;
2798         mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2799
2800         ieee80211_rx_bss_put(dev, bss);
2801
2802         return res;
2803 }
2804
2805
2806 static int ieee80211_sta_create_ibss(struct net_device *dev,
2807                                      struct ieee80211_if_sta *ifsta)
2808 {
2809         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2810         struct ieee80211_sta_bss *bss;
2811         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2812         struct ieee80211_hw_mode *mode;
2813         u8 bssid[ETH_ALEN], *pos;
2814         int i;
2815         DECLARE_MAC_BUF(mac);
2816
2817 #if 0
2818         /* Easier testing, use fixed BSSID. */
2819         memset(bssid, 0xfe, ETH_ALEN);
2820 #else
2821         /* Generate random, not broadcast, locally administered BSSID. Mix in
2822          * own MAC address to make sure that devices that do not have proper
2823          * random number generator get different BSSID. */
2824         get_random_bytes(bssid, ETH_ALEN);
2825         for (i = 0; i < ETH_ALEN; i++)
2826                 bssid[i] ^= dev->dev_addr[i];
2827         bssid[0] &= ~0x01;
2828         bssid[0] |= 0x02;
2829 #endif
2830
2831         printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2832                dev->name, print_mac(mac, bssid));
2833
2834         bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2835                                    sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2836         if (!bss)
2837                 return -ENOMEM;
2838
2839         mode = local->oper_hw_mode;
2840
2841         if (local->hw.conf.beacon_int == 0)
2842                 local->hw.conf.beacon_int = 100;
2843         bss->beacon_int = local->hw.conf.beacon_int;
2844         bss->hw_mode = local->hw.conf.phymode;
2845         bss->freq = local->hw.conf.freq;
2846         bss->last_update = jiffies;
2847         bss->capability = WLAN_CAPABILITY_IBSS;
2848         if (sdata->default_key) {
2849                 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2850         } else
2851                 sdata->drop_unencrypted = 0;
2852         bss->supp_rates_len = mode->num_rates;
2853         pos = bss->supp_rates;
2854         for (i = 0; i < mode->num_rates; i++) {
2855                 int rate = mode->rates[i].rate;
2856                 *pos++ = (u8) (rate / 5);
2857         }
2858
2859         return ieee80211_sta_join_ibss(dev, ifsta, bss);
2860 }
2861
2862
2863 static int ieee80211_sta_find_ibss(struct net_device *dev,
2864                                    struct ieee80211_if_sta *ifsta)
2865 {
2866         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2867         struct ieee80211_sta_bss *bss;
2868         int found = 0;
2869         u8 bssid[ETH_ALEN];
2870         int active_ibss;
2871         DECLARE_MAC_BUF(mac);
2872         DECLARE_MAC_BUF(mac2);
2873
2874         if (ifsta->ssid_len == 0)
2875                 return -EINVAL;
2876
2877         active_ibss = ieee80211_sta_active_ibss(dev);
2878 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2879         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2880                dev->name, active_ibss);
2881 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2882         spin_lock_bh(&local->sta_bss_lock);
2883         list_for_each_entry(bss, &local->sta_bss_list, list) {
2884                 if (ifsta->ssid_len != bss->ssid_len ||
2885                     memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2886                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
2887                         continue;
2888 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2889                 printk(KERN_DEBUG "   bssid=%s found\n",
2890                        print_mac(mac, bss->bssid));
2891 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2892                 memcpy(bssid, bss->bssid, ETH_ALEN);
2893                 found = 1;
2894                 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2895                         break;
2896         }
2897         spin_unlock_bh(&local->sta_bss_lock);
2898
2899 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2900         printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
2901                "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
2902 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2903         if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2904             (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2905                                         ifsta->ssid, ifsta->ssid_len))) {
2906                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2907                        " based on configured SSID\n",
2908                        dev->name, print_mac(mac, bssid));
2909                 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2910         }
2911 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2912         printk(KERN_DEBUG "   did not try to join ibss\n");
2913 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2914
2915         /* Selected IBSS not found in current scan results - try to scan */
2916         if (ifsta->state == IEEE80211_IBSS_JOINED &&
2917             !ieee80211_sta_active_ibss(dev)) {
2918                 mod_timer(&ifsta->timer, jiffies +
2919                                       IEEE80211_IBSS_MERGE_INTERVAL);
2920         } else if (time_after(jiffies, local->last_scan_completed +
2921                               IEEE80211_SCAN_INTERVAL)) {
2922                 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2923                        "join\n", dev->name);
2924                 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2925                                               ifsta->ssid_len);
2926         } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2927                 int interval = IEEE80211_SCAN_INTERVAL;
2928
2929                 if (time_after(jiffies, ifsta->ibss_join_req +
2930                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
2931                         if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2932                             local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2933                                 return ieee80211_sta_create_ibss(dev, ifsta);
2934                         if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2935                                 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2936                                        " configured channel %d (%d MHz)\n",
2937                                        dev->name, local->hw.conf.channel,
2938                                        local->hw.conf.freq);
2939                         }
2940
2941                         /* No IBSS found - decrease scan interval and continue
2942                          * scanning. */
2943                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
2944                 }
2945
2946                 ifsta->state = IEEE80211_IBSS_SEARCH;
2947                 mod_timer(&ifsta->timer, jiffies + interval);
2948                 return 0;
2949         }
2950
2951         return 0;
2952 }
2953
2954
2955 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2956 {
2957         struct ieee80211_sub_if_data *sdata;
2958         struct ieee80211_if_sta *ifsta;
2959         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2960
2961         if (len > IEEE80211_MAX_SSID_LEN)
2962                 return -EINVAL;
2963
2964         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2965          * not defined. */
2966         if (local->ops->conf_tx) {
2967                 struct ieee80211_tx_queue_params qparam;
2968                 int i;
2969
2970                 memset(&qparam, 0, sizeof(qparam));
2971                 /* TODO: are these ok defaults for all hw_modes? */
2972                 qparam.aifs = 2;
2973                 qparam.cw_min =
2974                         local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2975                 qparam.cw_max = 1023;
2976                 qparam.burst_time = 0;
2977                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2978                 {
2979                         local->ops->conf_tx(local_to_hw(local),
2980                                            i + IEEE80211_TX_QUEUE_DATA0,
2981                                            &qparam);
2982                 }
2983                 /* IBSS uses different parameters for Beacon sending */
2984                 qparam.cw_min++;
2985                 qparam.cw_min *= 2;
2986                 qparam.cw_min--;
2987                 local->ops->conf_tx(local_to_hw(local),
2988                                    IEEE80211_TX_QUEUE_BEACON, &qparam);
2989         }
2990
2991         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2992         ifsta = &sdata->u.sta;
2993
2994         if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2995                 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2996         memcpy(ifsta->ssid, ssid, len);
2997         memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2998         ifsta->ssid_len = len;
2999
3000         if (len)
3001                 ifsta->flags |= IEEE80211_STA_SSID_SET;
3002         else
3003                 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3004         if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
3005             !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3006                 ifsta->ibss_join_req = jiffies;
3007                 ifsta->state = IEEE80211_IBSS_SEARCH;
3008                 return ieee80211_sta_find_ibss(dev, ifsta);
3009         }
3010         return 0;
3011 }
3012
3013
3014 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3015 {
3016         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3017         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3018         memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3019         *len = ifsta->ssid_len;
3020         return 0;
3021 }
3022
3023
3024 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3025 {
3026         struct ieee80211_sub_if_data *sdata;
3027         struct ieee80211_if_sta *ifsta;
3028         int res;
3029
3030         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3031         ifsta = &sdata->u.sta;
3032
3033         if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3034                 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3035                 res = ieee80211_if_config(dev);
3036                 if (res) {
3037                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3038                                "the low-level driver\n", dev->name);
3039                         return res;
3040                 }
3041         }
3042
3043         if (is_valid_ether_addr(bssid))
3044                 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3045         else
3046                 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3047
3048         return 0;
3049 }
3050
3051
3052 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3053                                     struct ieee80211_sub_if_data *sdata,
3054                                     int powersave)
3055 {
3056         struct sk_buff *skb;
3057         struct ieee80211_hdr *nullfunc;
3058         u16 fc;
3059
3060         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3061         if (!skb) {
3062                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3063                        "frame\n", sdata->dev->name);
3064                 return;
3065         }
3066         skb_reserve(skb, local->hw.extra_tx_headroom);
3067
3068         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3069         memset(nullfunc, 0, 24);
3070         fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3071              IEEE80211_FCTL_TODS;
3072         if (powersave)
3073                 fc |= IEEE80211_FCTL_PM;
3074         nullfunc->frame_control = cpu_to_le16(fc);
3075         memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3076         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3077         memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3078
3079         ieee80211_sta_tx(sdata->dev, skb, 0);
3080 }
3081
3082
3083 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3084 {
3085         struct ieee80211_local *local = hw_to_local(hw);
3086         struct net_device *dev = local->scan_dev;
3087         struct ieee80211_sub_if_data *sdata;
3088         union iwreq_data wrqu;
3089
3090         local->last_scan_completed = jiffies;
3091         memset(&wrqu, 0, sizeof(wrqu));
3092         wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3093
3094         if (local->sta_hw_scanning) {
3095                 local->sta_hw_scanning = 0;
3096                 goto done;
3097         }
3098
3099         local->sta_sw_scanning = 0;
3100         if (ieee80211_hw_config(local))
3101                 printk(KERN_DEBUG "%s: failed to restore operational "
3102                        "channel after scan\n", dev->name);
3103
3104
3105         netif_tx_lock_bh(local->mdev);
3106         local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3107         local->ops->configure_filter(local_to_hw(local),
3108                                      FIF_BCN_PRBRESP_PROMISC,
3109                                      &local->filter_flags,
3110                                      local->mdev->mc_count,
3111                                      local->mdev->mc_list);
3112
3113         netif_tx_unlock_bh(local->mdev);
3114
3115         rcu_read_lock();
3116         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3117
3118                 /* No need to wake the master device. */
3119                 if (sdata->dev == local->mdev)
3120                         continue;
3121
3122                 if (sdata->type == IEEE80211_IF_TYPE_STA) {
3123                         if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3124                                 ieee80211_send_nullfunc(local, sdata, 0);
3125                         ieee80211_sta_timer((unsigned long)sdata);
3126                 }
3127
3128                 netif_wake_queue(sdata->dev);
3129         }
3130         rcu_read_unlock();
3131
3132 done:
3133         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3134         if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
3135                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3136                 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3137                     (!ifsta->state == IEEE80211_IBSS_JOINED &&
3138                     !ieee80211_sta_active_ibss(dev)))
3139                         ieee80211_sta_find_ibss(dev, ifsta);
3140         }
3141 }
3142 EXPORT_SYMBOL(ieee80211_scan_completed);
3143
3144 void ieee80211_sta_scan_work(struct work_struct *work)
3145 {
3146         struct ieee80211_local *local =
3147                 container_of(work, struct ieee80211_local, scan_work.work);
3148         struct net_device *dev = local->scan_dev;
3149         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3150         struct ieee80211_hw_mode *mode;
3151         struct ieee80211_channel *chan;
3152         int skip;
3153         unsigned long next_delay = 0;
3154
3155         if (!local->sta_sw_scanning)
3156                 return;
3157
3158         switch (local->scan_state) {
3159         case SCAN_SET_CHANNEL:
3160                 mode = local->scan_hw_mode;
3161                 if (local->scan_hw_mode->list.next == &local->modes_list &&
3162                     local->scan_channel_idx >= mode->num_channels) {
3163                         ieee80211_scan_completed(local_to_hw(local));
3164                         return;
3165                 }
3166                 skip = !(local->enabled_modes & (1 << mode->mode));
3167                 chan = &mode->channels[local->scan_channel_idx];
3168                 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3169                     (sdata->type == IEEE80211_IF_TYPE_IBSS &&
3170                      !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3171                     (local->hw_modes & local->enabled_modes &
3172                      (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3173                         skip = 1;
3174
3175                 if (!skip) {
3176 #if 0
3177                         printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3178                                dev->name, chan->chan, chan->freq);
3179 #endif
3180
3181                         local->scan_channel = chan;
3182                         if (ieee80211_hw_config(local)) {
3183                                 printk(KERN_DEBUG "%s: failed to set channel "
3184                                        "%d (%d MHz) for scan\n", dev->name,
3185                                        chan->chan, chan->freq);
3186                                 skip = 1;
3187                         }
3188                 }
3189
3190                 local->scan_channel_idx++;
3191                 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3192                         if (local->scan_hw_mode->list.next != &local->modes_list) {
3193                                 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3194                                                                  struct ieee80211_hw_mode,
3195                                                                  list);
3196                                 local->scan_channel_idx = 0;
3197                         }
3198                 }
3199
3200                 if (skip)
3201                         break;
3202
3203                 next_delay = IEEE80211_PROBE_DELAY +
3204                              usecs_to_jiffies(local->hw.channel_change_time);
3205                 local->scan_state = SCAN_SEND_PROBE;
3206                 break;
3207         case SCAN_SEND_PROBE:
3208                 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3209                         ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3210                                                  local->scan_ssid_len);
3211                         next_delay = IEEE80211_CHANNEL_TIME;
3212                 } else
3213                         next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3214                 local->scan_state = SCAN_SET_CHANNEL;
3215                 break;
3216         }
3217
3218         if (local->sta_sw_scanning)
3219                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3220                                    next_delay);
3221 }
3222
3223
3224 static int ieee80211_sta_start_scan(struct net_device *dev,
3225                                     u8 *ssid, size_t ssid_len)
3226 {
3227         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3228         struct ieee80211_sub_if_data *sdata;
3229
3230         if (ssid_len > IEEE80211_MAX_SSID_LEN)
3231                 return -EINVAL;
3232
3233         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
3234          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3235          * BSSID: MACAddress
3236          * SSID
3237          * ScanType: ACTIVE, PASSIVE
3238          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3239          *    a Probe frame during active scanning
3240          * ChannelList
3241          * MinChannelTime (>= ProbeDelay), in TU
3242          * MaxChannelTime: (>= MinChannelTime), in TU
3243          */
3244
3245          /* MLME-SCAN.confirm
3246           * BSSDescriptionSet
3247           * ResultCode: SUCCESS, INVALID_PARAMETERS
3248          */
3249
3250         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3251                 if (local->scan_dev == dev)
3252                         return 0;
3253                 return -EBUSY;
3254         }
3255
3256         if (local->ops->hw_scan) {
3257                 int rc = local->ops->hw_scan(local_to_hw(local),
3258                                              ssid, ssid_len);
3259                 if (!rc) {
3260                         local->sta_hw_scanning = 1;
3261                         local->scan_dev = dev;
3262                 }
3263                 return rc;
3264         }
3265
3266         local->sta_sw_scanning = 1;
3267
3268         rcu_read_lock();
3269         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3270
3271                 /* Don't stop the master interface, otherwise we can't transmit
3272                  * probes! */
3273                 if (sdata->dev == local->mdev)
3274                         continue;
3275
3276                 netif_stop_queue(sdata->dev);
3277                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
3278                     (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3279                         ieee80211_send_nullfunc(local, sdata, 1);
3280         }
3281         rcu_read_unlock();
3282
3283         if (ssid) {
3284                 local->scan_ssid_len = ssid_len;
3285                 memcpy(local->scan_ssid, ssid, ssid_len);
3286         } else
3287                 local->scan_ssid_len = 0;
3288         local->scan_state = SCAN_SET_CHANNEL;
3289         local->scan_hw_mode = list_entry(local->modes_list.next,
3290                                          struct ieee80211_hw_mode,
3291                                          list);
3292         local->scan_channel_idx = 0;
3293         local->scan_dev = dev;
3294
3295         netif_tx_lock_bh(local->mdev);
3296         local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3297         local->ops->configure_filter(local_to_hw(local),
3298                                      FIF_BCN_PRBRESP_PROMISC,
3299                                      &local->filter_flags,
3300                                      local->mdev->mc_count,
3301                                      local->mdev->mc_list);
3302         netif_tx_unlock_bh(local->mdev);
3303
3304         /* TODO: start scan as soon as all nullfunc frames are ACKed */
3305         queue_delayed_work(local->hw.workqueue, &local->scan_work,
3306                            IEEE80211_CHANNEL_TIME);
3307
3308         return 0;
3309 }
3310
3311
3312 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3313 {
3314         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3315         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3316         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3317
3318         if (sdata->type != IEEE80211_IF_TYPE_STA)
3319                 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3320
3321         if (local->sta_sw_scanning || local->sta_hw_scanning) {
3322                 if (local->scan_dev == dev)
3323                         return 0;
3324                 return -EBUSY;
3325         }
3326
3327         ifsta->scan_ssid_len = ssid_len;
3328         if (ssid_len)
3329                 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3330         set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3331         queue_work(local->hw.workqueue, &ifsta->work);
3332         return 0;
3333 }
3334
3335 static char *
3336 ieee80211_sta_scan_result(struct net_device *dev,
3337                           struct ieee80211_sta_bss *bss,
3338                           char *current_ev, char *end_buf)
3339 {
3340         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3341         struct iw_event iwe;
3342
3343         if (time_after(jiffies,
3344                        bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3345                 return current_ev;
3346
3347         if (!(local->enabled_modes & (1 << bss->hw_mode)))
3348                 return current_ev;
3349
3350         memset(&iwe, 0, sizeof(iwe));
3351         iwe.cmd = SIOCGIWAP;
3352         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3353         memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3354         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3355                                           IW_EV_ADDR_LEN);
3356
3357         memset(&iwe, 0, sizeof(iwe));
3358         iwe.cmd = SIOCGIWESSID;
3359         iwe.u.data.length = bss->ssid_len;
3360         iwe.u.data.flags = 1;
3361         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3362                                           bss->ssid);
3363
3364         if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3365                 memset(&iwe, 0, sizeof(iwe));
3366                 iwe.cmd = SIOCGIWMODE;
3367                 if (bss->capability & WLAN_CAPABILITY_ESS)
3368                         iwe.u.mode = IW_MODE_MASTER;
3369                 else
3370                         iwe.u.mode = IW_MODE_ADHOC;
3371                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3372                                                   IW_EV_UINT_LEN);
3373         }
3374
3375         memset(&iwe, 0, sizeof(iwe));
3376         iwe.cmd = SIOCGIWFREQ;
3377         iwe.u.freq.m = bss->channel;
3378         iwe.u.freq.e = 0;
3379         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3380                                           IW_EV_FREQ_LEN);
3381         iwe.u.freq.m = bss->freq * 100000;
3382         iwe.u.freq.e = 1;
3383         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3384                                           IW_EV_FREQ_LEN);
3385
3386         memset(&iwe, 0, sizeof(iwe));
3387         iwe.cmd = IWEVQUAL;
3388         iwe.u.qual.qual = bss->signal;
3389         iwe.u.qual.level = bss->rssi;
3390         iwe.u.qual.noise = bss->noise;
3391         iwe.u.qual.updated = local->wstats_flags;
3392         current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3393                                           IW_EV_QUAL_LEN);
3394
3395         memset(&iwe, 0, sizeof(iwe));
3396         iwe.cmd = SIOCGIWENCODE;
3397         if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3398                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3399         else
3400                 iwe.u.data.flags = IW_ENCODE_DISABLED;
3401         iwe.u.data.length = 0;
3402         current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3403
3404         if (bss && bss->wpa_ie) {
3405                 memset(&iwe, 0, sizeof(iwe));
3406                 iwe.cmd = IWEVGENIE;
3407                 iwe.u.data.length = bss->wpa_ie_len;
3408                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3409                                                   bss->wpa_ie);
3410         }
3411
3412         if (bss && bss->rsn_ie) {
3413                 memset(&iwe, 0, sizeof(iwe));
3414                 iwe.cmd = IWEVGENIE;
3415                 iwe.u.data.length = bss->rsn_ie_len;
3416                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3417                                                   bss->rsn_ie);
3418         }
3419
3420         if (bss && bss->supp_rates_len > 0) {
3421                 /* display all supported rates in readable format */
3422                 char *p = current_ev + IW_EV_LCP_LEN;
3423                 int i;
3424
3425                 memset(&iwe, 0, sizeof(iwe));
3426                 iwe.cmd = SIOCGIWRATE;
3427                 /* Those two flags are ignored... */
3428                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3429
3430                 for (i = 0; i < bss->supp_rates_len; i++) {
3431                         iwe.u.bitrate.value = ((bss->supp_rates[i] &
3432                                                         0x7f) * 500000);
3433                         p = iwe_stream_add_value(current_ev, p,
3434                                         end_buf, &iwe, IW_EV_PARAM_LEN);
3435                 }
3436                 current_ev = p;
3437         }
3438
3439         if (bss) {
3440                 char *buf;
3441                 buf = kmalloc(30, GFP_ATOMIC);
3442                 if (buf) {
3443                         memset(&iwe, 0, sizeof(iwe));
3444                         iwe.cmd = IWEVCUSTOM;
3445                         sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3446                         iwe.u.data.length = strlen(buf);
3447                         current_ev = iwe_stream_add_point(current_ev, end_buf,
3448                                                           &iwe, buf);
3449                         kfree(buf);
3450                 }
3451         }
3452
3453         return current_ev;
3454 }
3455
3456
3457 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3458 {
3459         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3460         char *current_ev = buf;
3461         char *end_buf = buf + len;
3462         struct ieee80211_sta_bss *bss;
3463
3464         spin_lock_bh(&local->sta_bss_lock);
3465         list_for_each_entry(bss, &local->sta_bss_list, list) {
3466                 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3467                         spin_unlock_bh(&local->sta_bss_lock);
3468                         return -E2BIG;
3469                 }
3470                 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3471                                                        end_buf);
3472         }
3473         spin_unlock_bh(&local->sta_bss_lock);
3474         return current_ev - buf;
3475 }
3476
3477
3478 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3479 {
3480         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3481         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3482         kfree(ifsta->extra_ie);
3483         if (len == 0) {
3484                 ifsta->extra_ie = NULL;
3485                 ifsta->extra_ie_len = 0;
3486                 return 0;
3487         }
3488         ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3489         if (!ifsta->extra_ie) {
3490                 ifsta->extra_ie_len = 0;
3491                 return -ENOMEM;
3492         }
3493         memcpy(ifsta->extra_ie, ie, len);
3494         ifsta->extra_ie_len = len;
3495         return 0;
3496 }
3497
3498
3499 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3500                                          struct sk_buff *skb, u8 *bssid,
3501                                          u8 *addr)
3502 {
3503         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3504         struct sta_info *sta;
3505         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3506         DECLARE_MAC_BUF(mac);
3507
3508         /* TODO: Could consider removing the least recently used entry and
3509          * allow new one to be added. */
3510         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3511                 if (net_ratelimit()) {
3512                         printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3513                                "entry %s\n", dev->name, print_mac(mac, addr));
3514                 }
3515                 return NULL;
3516         }
3517
3518         printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3519                wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3520
3521         sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3522         if (!sta)
3523                 return NULL;
3524
3525         sta->supp_rates = sdata->u.sta.supp_rates_bits;
3526
3527         rate_control_rate_init(sta, local);
3528
3529         return sta; /* caller will call sta_info_put() */
3530 }
3531
3532
3533 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3534 {
3535         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3536         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3537
3538         printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3539                dev->name, reason);
3540
3541         if (sdata->type != IEEE80211_IF_TYPE_STA &&
3542             sdata->type != IEEE80211_IF_TYPE_IBSS)
3543                 return -EINVAL;
3544
3545         ieee80211_send_deauth(dev, ifsta, reason);
3546         ieee80211_set_disassoc(dev, ifsta, 1);
3547         return 0;
3548 }
3549
3550
3551 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3552 {
3553         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3554         struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3555
3556         printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3557                dev->name, reason);
3558
3559         if (sdata->type != IEEE80211_IF_TYPE_STA)
3560                 return -EINVAL;
3561
3562         if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3563                 return -1;
3564
3565         ieee80211_send_disassoc(dev, ifsta, reason);
3566         ieee80211_set_disassoc(dev, ifsta, 0);
3567         return 0;
3568 }