src/ap/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "radius/radius.h"
  19 #include "radius/radius_client.h"
  20 #include "drivers/driver.h"
  21 #include "hostapd.h"
  22 #include "sta_info.h"
  23 #include "eloop.h"
  24 #include "accounting.h"
  25 #include "ieee802_1x.h"
  26 #include "ieee802_11.h"
  27 #include "wpa.h"
  28 #include "preauth.h"
  29 #include "config.h"
  30 #include "beacon.h"
  31 #include "mlme.h"
  32 #include "vlan_init.h"
  33
  34 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
  35                                struct sta_info *sta, u32 flags);
  36 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  37 #ifdef CONFIG_IEEE80211W
  38 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  39 #endif /* CONFIG_IEEE80211W */
  40
  41 int ap_for_each_sta(struct hostapd_data *hapd,
  42                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  43                               void *ctx),
  44                     void *ctx)
  45 {
  46         struct sta_info *sta;
  47
  48         for (sta = hapd->sta_list; sta; sta = sta->next) {
  49                 if (cb(hapd, sta, ctx))
  50                         return 1;
  51         }
  52
  53         return 0;
  54 }
  55
  56
  57 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  58 {
  59         struct sta_info *s;
  60
  61         s = hapd->sta_hash[STA_HASH(sta)];
  62         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  63                 s = s->hnext;
  64         return s;
  65 }
  66
  67
  68 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  69 {
  70         struct sta_info *tmp;
  71
  72         if (hapd->sta_list == sta) {
  73                 hapd->sta_list = sta->next;
  74                 return;
  75         }
  76
  77         tmp = hapd->sta_list;
  78         while (tmp != NULL && tmp->next != sta)
  79                 tmp = tmp->next;
  80         if (tmp == NULL) {
  81                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
  82                            "list.", MAC2STR(sta->addr));
  83         } else
  84                 tmp->next = sta->next;
  85 }
  86
  87
  88 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
  89 {
  90         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
  91         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
  92 }
  93
  94
  95 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
  96 {
  97         struct sta_info *s;
  98
  99         s = hapd->sta_hash[STA_HASH(sta->addr)];
 100         if (s == NULL) return;
 101         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 102                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 103                 return;
 104         }
 105
 106         while (s->hnext != NULL &&
 107                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 108                 s = s->hnext;
 109         if (s->hnext != NULL)
 110                 s->hnext = s->hnext->hnext;
 111         else
 112                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 113                            " from hash table", MAC2STR(sta->addr));
 114 }
 115
 116
 117 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 118 {
 119         int set_beacon = 0;
 120
 121         accounting_sta_stop(hapd, sta);
 122
 123         hapd->drv.set_wds_sta(hapd, sta->addr, sta->aid, 0);
 124         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC) &&
 125             !(sta->flags & WLAN_STA_PREAUTH))
 126                 hapd->drv.sta_remove(hapd, sta->addr);
 127
 128         ap_sta_hash_del(hapd, sta);
 129         ap_sta_list_del(hapd, sta);
 130
 131         if (sta->aid > 0)
 132                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 133                         ~BIT((sta->aid - 1) % 32);
 134
 135         hapd->num_sta--;
 136         if (sta->nonerp_set) {
 137                 sta->nonerp_set = 0;
 138                 hapd->iface->num_sta_non_erp--;
 139                 if (hapd->iface->num_sta_non_erp == 0)
 140                         set_beacon++;
 141         }
 142
 143         if (sta->no_short_slot_time_set) {
 144                 sta->no_short_slot_time_set = 0;
 145                 hapd->iface->num_sta_no_short_slot_time--;
 146                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 147                     && hapd->iface->num_sta_no_short_slot_time == 0)
 148                         set_beacon++;
 149         }
 150
 151         if (sta->no_short_preamble_set) {
 152                 sta->no_short_preamble_set = 0;
 153                 hapd->iface->num_sta_no_short_preamble--;
 154                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 155                     && hapd->iface->num_sta_no_short_preamble == 0)
 156                         set_beacon++;
 157         }
 158
 159         if (sta->no_ht_gf_set) {
 160                 sta->no_ht_gf_set = 0;
 161                 hapd->iface->num_sta_ht_no_gf--;
 162         }
 163
 164         if (sta->no_ht_set) {
 165                 sta->no_ht_set = 0;
 166                 hapd->iface->num_sta_no_ht--;
 167         }
 168
 169         if (sta->ht_20mhz_set) {
 170                 sta->ht_20mhz_set = 0;
 171                 hapd->iface->num_sta_ht_20mhz--;
 172         }
 173
 174 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 175         if (hostapd_ht_operation_update(hapd->iface) > 0)
 176                 set_beacon++;
 177 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 178
 179         if (set_beacon)
 180                 ieee802_11_set_beacons(hapd->iface);
 181
 182         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 183         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 184
 185         ieee802_1x_free_station(sta);
 186         wpa_auth_sta_deinit(sta->wpa_sm);
 187         rsn_preauth_free_station(hapd, sta);
 188 #ifndef CONFIG_NO_RADIUS
 189         radius_client_flush_auth(hapd->radius, sta->addr);
 190 #endif /* CONFIG_NO_RADIUS */
 191
 192         os_free(sta->last_assoc_req);
 193         os_free(sta->challenge);
 194
 195 #ifdef CONFIG_IEEE80211W
 196         os_free(sta->sa_query_trans_id);
 197         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 198 #endif /* CONFIG_IEEE80211W */
 199
 200         wpabuf_free(sta->wps_ie);
 201
 202         os_free(sta->ht_capabilities);
 203
 204         os_free(sta);
 205 }
 206
 207
 208 void hostapd_free_stas(struct hostapd_data *hapd)
 209 {
 210         struct sta_info *sta, *prev;
 211
 212         sta = hapd->sta_list;
 213
 214         while (sta) {
 215                 prev = sta;
 216                 if (sta->flags & WLAN_STA_AUTH) {
 217                         mlme_deauthenticate_indication(
 218                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 219                 }
 220                 sta = sta->next;
 221                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 222                            MAC2STR(prev->addr));
 223                 ap_free_sta(hapd, prev);
 224         }
 225 }
 226
 227
 228 /**
 229  * ap_handle_timer - Per STA timer handler
 230  * @eloop_ctx: struct hostapd_data *
 231  * @timeout_ctx: struct sta_info *
 232  *
 233  * This function is called to check station activity and to remove inactive
 234  * stations.
 235  */
 236 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 237 {
 238         struct hostapd_data *hapd = eloop_ctx;
 239         struct sta_info *sta = timeout_ctx;
 240         unsigned long next_time = 0;
 241
 242         if (sta->timeout_next == STA_REMOVE) {
 243                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 244                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 245                                "local deauth request");
 246                 ap_free_sta(hapd, sta);
 247                 return;
 248         }
 249
 250         if ((sta->flags & WLAN_STA_ASSOC) &&
 251             (sta->timeout_next == STA_NULLFUNC ||
 252              sta->timeout_next == STA_DISASSOC)) {
 253                 int inactive_sec;
 254                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
 255                            MAC2STR(sta->addr));
 256                 inactive_sec = hapd->drv.get_inact_sec(hapd, sta->addr);
 257                 if (inactive_sec == -1) {
 258                         wpa_printf(MSG_DEBUG, "Could not get station info "
 259                                    "from kernel driver for " MACSTR ".",
 260                                    MAC2STR(sta->addr));
 261                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 262                            sta->flags & WLAN_STA_ASSOC) {
 263                         /* station activity detected; reset timeout state */
 264                         wpa_printf(MSG_DEBUG, "  Station has been active");
 265                         sta->timeout_next = STA_NULLFUNC;
 266                         next_time = hapd->conf->ap_max_inactivity -
 267                                 inactive_sec;
 268                 }
 269         }
 270
 271         if ((sta->flags & WLAN_STA_ASSOC) &&
 272             sta->timeout_next == STA_DISASSOC &&
 273             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 274                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
 275                 /* data nullfunc frame poll did not produce TX errors; assume
 276                  * station ACKed it */
 277                 sta->timeout_next = STA_NULLFUNC;
 278                 next_time = hapd->conf->ap_max_inactivity;
 279         }
 280
 281         if (next_time) {
 282                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 283                                        sta);
 284                 return;
 285         }
 286
 287         if (sta->timeout_next == STA_NULLFUNC &&
 288             (sta->flags & WLAN_STA_ASSOC)) {
 289                 /* send data frame to poll STA and check whether this frame
 290                  * is ACKed */
 291                 struct ieee80211_hdr hdr;
 292
 293                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 294                 sta->flags |= WLAN_STA_PENDING_POLL;
 295
 296 #ifndef CONFIG_NATIVE_WINDOWS
 297                 os_memset(&hdr, 0, sizeof(hdr));
 298                 if (hapd->driver &&
 299                     os_strcmp(hapd->driver->name, "hostap") == 0) {
 300                         /*
 301                          * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
 302                          * but it is apparently not retried so TX Exc events
 303                          * are not received for it.
 304                          */
 305                         hdr.frame_control =
 306                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 307                                              WLAN_FC_STYPE_DATA);
 308                 } else {
 309                         hdr.frame_control =
 310                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 311                                              WLAN_FC_STYPE_NULLFUNC);
 312                 }
 313
 314                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 315                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 316                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 317                           ETH_ALEN);
 318                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 319
 320                 if (hapd->drv.send_mgmt_frame(hapd, &hdr, sizeof(hdr)) < 0)
 321                         perror("ap_handle_timer: send");
 322 #endif /* CONFIG_NATIVE_WINDOWS */
 323         } else if (sta->timeout_next != STA_REMOVE) {
 324                 int deauth = sta->timeout_next == STA_DEAUTH;
 325
 326                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 327                            deauth ? "deauthentication" : "disassociation",
 328                            MAC2STR(sta->addr));
 329
 330                 if (deauth) {
 331                         hapd->drv.sta_deauth(hapd, sta->addr,
 332                                              WLAN_REASON_PREV_AUTH_NOT_VALID);
 333                 } else {
 334                         hapd->drv.sta_disassoc(
 335                                 hapd, sta->addr,
 336                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 337                 }
 338         }
 339
 340         switch (sta->timeout_next) {
 341         case STA_NULLFUNC:
 342                 sta->timeout_next = STA_DISASSOC;
 343                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 344                                        hapd, sta);
 345                 break;
 346         case STA_DISASSOC:
 347                 sta->flags &= ~WLAN_STA_ASSOC;
 348                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 349                 if (!sta->acct_terminate_cause)
 350                         sta->acct_terminate_cause =
 351                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 352                 accounting_sta_stop(hapd, sta);
 353                 ieee802_1x_free_station(sta);
 354                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 355                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 356                                "inactivity");
 357                 sta->timeout_next = STA_DEAUTH;
 358                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 359                                        hapd, sta);
 360                 mlme_disassociate_indication(
 361                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 362                 break;
 363         case STA_DEAUTH:
 364         case STA_REMOVE:
 365                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 366                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 367                                "inactivity");
 368                 if (!sta->acct_terminate_cause)
 369                         sta->acct_terminate_cause =
 370                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 371                 mlme_deauthenticate_indication(
 372                         hapd, sta,
 373                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 374                 ap_free_sta(hapd, sta);
 375                 break;
 376         }
 377 }
 378
 379
 380 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 381 {
 382         struct hostapd_data *hapd = eloop_ctx;
 383         struct sta_info *sta = timeout_ctx;
 384         u8 addr[ETH_ALEN];
 385
 386         if (!(sta->flags & WLAN_STA_AUTH))
 387                 return;
 388
 389         mlme_deauthenticate_indication(hapd, sta,
 390                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 391         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 392                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 393                        "session timeout");
 394         sta->acct_terminate_cause =
 395                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 396         os_memcpy(addr, sta->addr, ETH_ALEN);
 397         ap_free_sta(hapd, sta);
 398         hapd->drv.sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 399 }
 400
 401
 402 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 403                             u32 session_timeout)
 404 {
 405         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 406                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 407                        "seconds", session_timeout);
 408         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 409         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 410                                hapd, sta);
 411 }
 412
 413
 414 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 415 {
 416         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 417 }
 418
 419
 420 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 421 {
 422         struct sta_info *sta;
 423
 424         sta = ap_get_sta(hapd, addr);
 425         if (sta)
 426                 return sta;
 427
 428         wpa_printf(MSG_DEBUG, "  New STA");
 429         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 430                 /* FIX: might try to remove some old STAs first? */
 431                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 432                            hapd->num_sta, hapd->conf->max_num_sta);
 433                 return NULL;
 434         }
 435
 436         sta = os_zalloc(sizeof(struct sta_info));
 437         if (sta == NULL) {
 438                 wpa_printf(MSG_ERROR, "malloc failed");
 439                 return NULL;
 440         }
 441         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 442
 443         /* initialize STA info data */
 444         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 445                                ap_handle_timer, hapd, sta);
 446         os_memcpy(sta->addr, addr, ETH_ALEN);
 447         sta->next = hapd->sta_list;
 448         hapd->sta_list = sta;
 449         hapd->num_sta++;
 450         ap_sta_hash_add(hapd, sta);
 451         sta->ssid = &hapd->conf->ssid;
 452
 453         return sta;
 454 }
 455
 456
 457 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 458 {
 459         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 460
 461         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 462                    MAC2STR(sta->addr));
 463         if (hapd->drv.sta_remove(hapd, sta->addr) &&
 464             sta->flags & WLAN_STA_ASSOC) {
 465                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 466                            " from kernel driver.", MAC2STR(sta->addr));
 467                 return -1;
 468         }
 469         return 0;
 470 }
 471
 472
 473 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
 474                                struct sta_info *sta, u32 flags)
 475 {
 476         struct hostapd_iface *iface = hapd->iface;
 477         size_t i;
 478
 479         for (i = 0; i < iface->num_bss; i++) {
 480                 struct hostapd_data *bss = iface->bss[i];
 481                 struct sta_info *sta2;
 482                 /* bss should always be set during operation, but it may be
 483                  * NULL during reconfiguration. Assume the STA is not
 484                  * associated to another BSS in that case to avoid NULL pointer
 485                  * dereferences. */
 486                 if (bss == hapd || bss == NULL)
 487                         continue;
 488                 sta2 = ap_get_sta(bss, sta->addr);
 489                 if (sta2 && ((sta2->flags & flags) == flags))
 490                         return 1;
 491         }
 492
 493         return 0;
 494 }
 495
 496
 497 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 498                          u16 reason)
 499 {
 500         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 501                    hapd->conf->iface, MAC2STR(sta->addr));
 502         sta->flags &= ~WLAN_STA_ASSOC;
 503         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 504                 ap_sta_remove(hapd, sta);
 505         sta->timeout_next = STA_DEAUTH;
 506         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 507         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 508                                ap_handle_timer, hapd, sta);
 509         accounting_sta_stop(hapd, sta);
 510         ieee802_1x_free_station(sta);
 511
 512         mlme_disassociate_indication(hapd, sta, reason);
 513 }
 514
 515
 516 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 517                            u16 reason)
 518 {
 519         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 520                    hapd->conf->iface, MAC2STR(sta->addr));
 521         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 522         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 523                 ap_sta_remove(hapd, sta);
 524         sta->timeout_next = STA_REMOVE;
 525         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 526         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 527                                ap_handle_timer, hapd, sta);
 528         accounting_sta_stop(hapd, sta);
 529         ieee802_1x_free_station(sta);
 530
 531         mlme_deauthenticate_indication(hapd, sta, reason);
 532 }
 533
 534
 535 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 536                      int old_vlanid)
 537 {
 538 #ifndef CONFIG_NO_VLAN
 539         const char *iface;
 540         struct hostapd_vlan *vlan = NULL;
 541
 542         /*
 543          * Do not proceed furthur if the vlan id remains same. We do not want
 544          * duplicate dynamic vlan entries.
 545          */
 546         if (sta->vlan_id == old_vlanid)
 547                 return 0;
 548
 549         /*
 550          * During 1x reauth, if the vlan id changes, then remove the old id and
 551          * proceed furthur to add the new one.
 552          */
 553         if (old_vlanid > 0)
 554                 vlan_remove_dynamic(hapd, old_vlanid);
 555
 556         iface = hapd->conf->iface;
 557         if (sta->ssid->vlan[0])
 558                 iface = sta->ssid->vlan;
 559
 560         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 561                 sta->vlan_id = 0;
 562         else if (sta->vlan_id > 0) {
 563                 vlan = hapd->conf->vlan;
 564                 while (vlan) {
 565                         if (vlan->vlan_id == sta->vlan_id ||
 566                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 567                                 iface = vlan->ifname;
 568                                 break;
 569                         }
 570                         vlan = vlan->next;
 571                 }
 572         }
 573
 574         if (sta->vlan_id > 0 && vlan == NULL) {
 575                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 576                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 577                                "binding station to (vlan_id=%d)",
 578                                sta->vlan_id);
 579                 return -1;
 580         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 581                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 582                 if (vlan == NULL) {
 583                         hostapd_logger(hapd, sta->addr,
 584                                        HOSTAPD_MODULE_IEEE80211,
 585                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 586                                        "dynamic VLAN interface for vlan_id=%d",
 587                                        sta->vlan_id);
 588                         return -1;
 589                 }
 590
 591                 iface = vlan->ifname;
 592                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 593                         hostapd_logger(hapd, sta->addr,
 594                                        HOSTAPD_MODULE_IEEE80211,
 595                                        HOSTAPD_LEVEL_DEBUG, "could not "
 596                                        "configure encryption for dynamic VLAN "
 597                                        "interface for vlan_id=%d",
 598                                        sta->vlan_id);
 599                 }
 600
 601                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 602                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 603                                "interface '%s'", iface);
 604         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 605                 if (sta->vlan_id > 0) {
 606                         vlan->dynamic_vlan++;
 607                         hostapd_logger(hapd, sta->addr,
 608                                        HOSTAPD_MODULE_IEEE80211,
 609                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 610                                        "dynamic VLAN interface '%s'", iface);
 611                 }
 612
 613                 /*
 614                  * Update encryption configuration for statically generated
 615                  * VLAN interface. This is only used for static WEP
 616                  * configuration for the case where hostapd did not yet know
 617                  * which keys are to be used when the interface was added.
 618                  */
 619                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 620                         hostapd_logger(hapd, sta->addr,
 621                                        HOSTAPD_MODULE_IEEE80211,
 622                                        HOSTAPD_LEVEL_DEBUG, "could not "
 623                                        "configure encryption for VLAN "
 624                                        "interface for vlan_id=%d",
 625                                        sta->vlan_id);
 626                 }
 627         }
 628
 629         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 630                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 631                        "'%s'", iface);
 632
 633         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 634                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 635
 636         return hapd->drv.set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 637 #else /* CONFIG_NO_VLAN */
 638         return 0;
 639 #endif /* CONFIG_NO_VLAN */
 640 }
 641
 642
 643 #ifdef CONFIG_IEEE80211W
 644
 645 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 646 {
 647         u32 tu;
 648         struct os_time now, passed;
 649         os_get_time(&now);
 650         os_time_sub(&now, &sta->sa_query_start, &passed);
 651         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 652         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 653                 hostapd_logger(hapd, sta->addr,
 654                                HOSTAPD_MODULE_IEEE80211,
 655                                HOSTAPD_LEVEL_DEBUG,
 656                                "association SA Query timed out");
 657                 sta->sa_query_timed_out = 1;
 658                 os_free(sta->sa_query_trans_id);
 659                 sta->sa_query_trans_id = NULL;
 660                 sta->sa_query_count = 0;
 661                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 662                 return 1;
 663         }
 664
 665         return 0;
 666 }
 667
 668
 669 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 670 {
 671         struct hostapd_data *hapd = eloop_ctx;
 672         struct sta_info *sta = timeout_ctx;
 673         unsigned int timeout, sec, usec;
 674         u8 *trans_id, *nbuf;
 675
 676         if (sta->sa_query_count > 0 &&
 677             ap_check_sa_query_timeout(hapd, sta))
 678                 return;
 679
 680         nbuf = os_realloc(sta->sa_query_trans_id,
 681                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 682         if (nbuf == NULL)
 683                 return;
 684         if (sta->sa_query_count == 0) {
 685                 /* Starting a new SA Query procedure */
 686                 os_get_time(&sta->sa_query_start);
 687         }
 688         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 689         sta->sa_query_trans_id = nbuf;
 690         sta->sa_query_count++;
 691
 692         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 693
 694         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 695         sec = ((timeout / 1000) * 1024) / 1000;
 696         usec = (timeout % 1000) * 1024;
 697         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 698
 699         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 700                        HOSTAPD_LEVEL_DEBUG,
 701                        "association SA Query attempt %d", sta->sa_query_count);
 702
 703 #ifdef NEED_AP_MLME
 704         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 705 #endif /* NEED_AP_MLME */
 706 }
 707
 708
 709 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 710 {
 711         ap_sa_query_timer(hapd, sta);
 712 }
 713
 714
 715 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 716 {
 717         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 718         os_free(sta->sa_query_trans_id);
 719         sta->sa_query_trans_id = NULL;
 720         sta->sa_query_count = 0;
 721 }
 722
 723 #endif /* CONFIG_IEEE80211W */
 724
 725
 726 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 727                        const u8 *addr, u16 reason)
 728 {
 729
 730         if (sta == NULL && addr)
 731                 sta = ap_get_sta(hapd, addr);
 732
 733         if (addr)
 734                 hapd->drv.sta_deauth(hapd, addr, reason);
 735
 736         if (sta == NULL)
 737                 return;
 738         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_AUTHORIZED);
 739         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 740         eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
 741         sta->timeout_next = STA_REMOVE;
 742 }