contrib/hostapd/hostapd/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2007-2008, Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #include "includes.h"
  17
  18 #include "hostapd.h"
  19 #include "sta_info.h"
  20 #include "eloop.h"
  21 #include "accounting.h"
  22 #include "ieee802_1x.h"
  23 #include "ieee802_11.h"
  24 #include "radius/radius.h"
  25 #include "wpa.h"
  26 #include "preauth.h"
  27 #include "radius/radius_client.h"
  28 #include "driver.h"
  29 #include "beacon.h"
  30 #include "hw_features.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         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC) &&
 124             !(sta->flags & WLAN_STA_PREAUTH))
 125                 hostapd_sta_remove(hapd, sta->addr);
 126
 127         ap_sta_hash_del(hapd, sta);
 128         ap_sta_list_del(hapd, sta);
 129
 130         if (sta->aid > 0)
 131                 hapd->sta_aid[sta->aid - 1] = NULL;
 132
 133         hapd->num_sta--;
 134         if (sta->nonerp_set) {
 135                 sta->nonerp_set = 0;
 136                 hapd->iface->num_sta_non_erp--;
 137                 if (hapd->iface->num_sta_non_erp == 0)
 138                         set_beacon++;
 139         }
 140
 141         if (sta->no_short_slot_time_set) {
 142                 sta->no_short_slot_time_set = 0;
 143                 hapd->iface->num_sta_no_short_slot_time--;
 144                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 145                     && hapd->iface->num_sta_no_short_slot_time == 0)
 146                         set_beacon++;
 147         }
 148
 149         if (sta->no_short_preamble_set) {
 150                 sta->no_short_preamble_set = 0;
 151                 hapd->iface->num_sta_no_short_preamble--;
 152                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 153                     && hapd->iface->num_sta_no_short_preamble == 0)
 154                         set_beacon++;
 155         }
 156
 157 #ifdef CONFIG_IEEE80211N
 158         if (sta->no_ht_gf_set) {
 159                 sta->no_ht_gf_set = 0;
 160                 hapd->iface->num_sta_ht_no_gf--;
 161         }
 162
 163         if (sta->no_ht_set) {
 164                 sta->no_ht_set = 0;
 165                 hapd->iface->num_sta_no_ht--;
 166         }
 167
 168         if (sta->ht_20mhz_set) {
 169                 sta->ht_20mhz_set = 0;
 170                 hapd->iface->num_sta_ht_20mhz--;
 171         }
 172
 173         if (hostapd_ht_operation_update(hapd->iface) > 0)
 174                 set_beacon++;
 175 #endif /* CONFIG_IEEE80211N */
 176
 177         if (set_beacon)
 178                 ieee802_11_set_beacons(hapd->iface);
 179
 180         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 181         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 182
 183         ieee802_1x_free_station(sta);
 184         wpa_auth_sta_deinit(sta->wpa_sm);
 185         rsn_preauth_free_station(hapd, sta);
 186         radius_client_flush_auth(hapd->radius, sta->addr);
 187
 188         os_free(sta->last_assoc_req);
 189         os_free(sta->challenge);
 190
 191 #ifdef CONFIG_IEEE80211W
 192         os_free(sta->sa_query_trans_id);
 193         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 194 #endif /* CONFIG_IEEE80211W */
 195
 196         wpabuf_free(sta->wps_ie);
 197
 198         os_free(sta);
 199 }
 200
 201
 202 void hostapd_free_stas(struct hostapd_data *hapd)
 203 {
 204         struct sta_info *sta, *prev;
 205
 206         sta = hapd->sta_list;
 207
 208         while (sta) {
 209                 prev = sta;
 210                 if (sta->flags & WLAN_STA_AUTH) {
 211                         mlme_deauthenticate_indication(
 212                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 213                 }
 214                 sta = sta->next;
 215                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 216                            MAC2STR(prev->addr));
 217                 ap_free_sta(hapd, prev);
 218         }
 219 }
 220
 221
 222 /**
 223  * ap_handle_timer - Per STA timer handler
 224  * @eloop_ctx: struct hostapd_data *
 225  * @timeout_ctx: struct sta_info *
 226  *
 227  * This function is called to check station activity and to remove inactive
 228  * stations.
 229  */
 230 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 231 {
 232         struct hostapd_data *hapd = eloop_ctx;
 233         struct sta_info *sta = timeout_ctx;
 234         unsigned long next_time = 0;
 235
 236         if (sta->timeout_next == STA_REMOVE) {
 237                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 238                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 239                                "local deauth request");
 240                 ap_free_sta(hapd, sta);
 241                 return;
 242         }
 243
 244         if ((sta->flags & WLAN_STA_ASSOC) &&
 245             (sta->timeout_next == STA_NULLFUNC ||
 246              sta->timeout_next == STA_DISASSOC)) {
 247                 int inactive_sec;
 248                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
 249                            MAC2STR(sta->addr));
 250                 inactive_sec = hostapd_get_inact_sec(hapd, sta->addr);
 251                 if (inactive_sec == -1) {
 252                         wpa_printf(MSG_DEBUG, "Could not get station info "
 253                                    "from kernel driver for " MACSTR ".",
 254                                    MAC2STR(sta->addr));
 255                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 256                            sta->flags & WLAN_STA_ASSOC) {
 257                         /* station activity detected; reset timeout state */
 258                         wpa_printf(MSG_DEBUG, "  Station has been active");
 259                         sta->timeout_next = STA_NULLFUNC;
 260                         next_time = hapd->conf->ap_max_inactivity -
 261                                 inactive_sec;
 262                 }
 263         }
 264
 265         if ((sta->flags & WLAN_STA_ASSOC) &&
 266             sta->timeout_next == STA_DISASSOC &&
 267             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 268                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
 269                 /* data nullfunc frame poll did not produce TX errors; assume
 270                  * station ACKed it */
 271                 sta->timeout_next = STA_NULLFUNC;
 272                 next_time = hapd->conf->ap_max_inactivity;
 273         }
 274
 275         if (next_time) {
 276                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 277                                        sta);
 278                 return;
 279         }
 280
 281         if (sta->timeout_next == STA_NULLFUNC &&
 282             (sta->flags & WLAN_STA_ASSOC)) {
 283                 /* send data frame to poll STA and check whether this frame
 284                  * is ACKed */
 285                 struct ieee80211_hdr hdr;
 286
 287                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 288                 sta->flags |= WLAN_STA_PENDING_POLL;
 289
 290 #ifndef CONFIG_NATIVE_WINDOWS
 291                 os_memset(&hdr, 0, sizeof(hdr));
 292                 if (hapd->driver &&
 293                     os_strcmp(hapd->driver->name, "hostap") == 0) {
 294                         /*
 295                          * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
 296                          * but it is apparently not retried so TX Exc events
 297                          * are not received for it.
 298                          */
 299                         hdr.frame_control =
 300                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 301                                              WLAN_FC_STYPE_DATA);
 302                 } else {
 303                         hdr.frame_control =
 304                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 305                                              WLAN_FC_STYPE_NULLFUNC);
 306                 }
 307
 308                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 309                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 310                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 311                           ETH_ALEN);
 312                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 313
 314                 if (hostapd_send_mgmt_frame(hapd, &hdr, sizeof(hdr), 0) < 0)
 315                         perror("ap_handle_timer: send");
 316 #endif /* CONFIG_NATIVE_WINDOWS */
 317         } else if (sta->timeout_next != STA_REMOVE) {
 318                 int deauth = sta->timeout_next == STA_DEAUTH;
 319
 320                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 321                            deauth ? "deauthentication" : "disassociation",
 322                            MAC2STR(sta->addr));
 323
 324                 if (deauth) {
 325                         hostapd_sta_deauth(hapd, sta->addr,
 326                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 327                 } else {
 328                         hostapd_sta_disassoc(
 329                                 hapd, sta->addr,
 330                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 331                 }
 332         }
 333
 334         switch (sta->timeout_next) {
 335         case STA_NULLFUNC:
 336                 sta->timeout_next = STA_DISASSOC;
 337                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 338                                        hapd, sta);
 339                 break;
 340         case STA_DISASSOC:
 341                 sta->flags &= ~WLAN_STA_ASSOC;
 342                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 343                 if (!sta->acct_terminate_cause)
 344                         sta->acct_terminate_cause =
 345                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 346                 accounting_sta_stop(hapd, sta);
 347                 ieee802_1x_free_station(sta);
 348                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 349                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 350                                "inactivity");
 351                 sta->timeout_next = STA_DEAUTH;
 352                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 353                                        hapd, sta);
 354                 mlme_disassociate_indication(
 355                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 356                 break;
 357         case STA_DEAUTH:
 358         case STA_REMOVE:
 359                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 360                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 361                                "inactivity");
 362                 if (!sta->acct_terminate_cause)
 363                         sta->acct_terminate_cause =
 364                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 365                 mlme_deauthenticate_indication(
 366                         hapd, sta,
 367                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 368                 ap_free_sta(hapd, sta);
 369                 break;
 370         }
 371 }
 372
 373
 374 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 375 {
 376         struct hostapd_data *hapd = eloop_ctx;
 377         struct sta_info *sta = timeout_ctx;
 378         u8 addr[ETH_ALEN];
 379
 380         if (!(sta->flags & WLAN_STA_AUTH))
 381                 return;
 382
 383         mlme_deauthenticate_indication(hapd, sta,
 384                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 385         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 386                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 387                        "session timeout");
 388         sta->acct_terminate_cause =
 389                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 390         os_memcpy(addr, sta->addr, ETH_ALEN);
 391         ap_free_sta(hapd, sta);
 392         hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 393 }
 394
 395
 396 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 397                             u32 session_timeout)
 398 {
 399         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 400                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 401                        "seconds", session_timeout);
 402         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 403         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 404                                hapd, sta);
 405 }
 406
 407
 408 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 409 {
 410         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 411 }
 412
 413
 414 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 415 {
 416         struct sta_info *sta;
 417
 418         sta = ap_get_sta(hapd, addr);
 419         if (sta)
 420                 return sta;
 421
 422         wpa_printf(MSG_DEBUG, "  New STA");
 423         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 424                 /* FIX: might try to remove some old STAs first? */
 425                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 426                            hapd->num_sta, hapd->conf->max_num_sta);
 427                 return NULL;
 428         }
 429
 430         sta = os_zalloc(sizeof(struct sta_info));
 431         if (sta == NULL) {
 432                 wpa_printf(MSG_ERROR, "malloc failed");
 433                 return NULL;
 434         }
 435         sta->acct_interim_interval = hapd->conf->radius->acct_interim_interval;
 436
 437         /* initialize STA info data */
 438         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 439                                ap_handle_timer, hapd, sta);
 440         os_memcpy(sta->addr, addr, ETH_ALEN);
 441         sta->next = hapd->sta_list;
 442         hapd->sta_list = sta;
 443         hapd->num_sta++;
 444         ap_sta_hash_add(hapd, sta);
 445         sta->ssid = &hapd->conf->ssid;
 446
 447         return sta;
 448 }
 449
 450
 451 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 452 {
 453         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 454
 455         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 456                    MAC2STR(sta->addr));
 457         if (hostapd_sta_remove(hapd, sta->addr) &&
 458             sta->flags & WLAN_STA_ASSOC) {
 459                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 460                            " from kernel driver.", MAC2STR(sta->addr));
 461                 return -1;
 462         }
 463         return 0;
 464 }
 465
 466
 467 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
 468                                struct sta_info *sta, u32 flags)
 469 {
 470         struct hostapd_iface *iface = hapd->iface;
 471         size_t i;
 472
 473         for (i = 0; i < iface->num_bss; i++) {
 474                 struct hostapd_data *bss = iface->bss[i];
 475                 struct sta_info *sta2;
 476                 /* bss should always be set during operation, but it may be
 477                  * NULL during reconfiguration. Assume the STA is not
 478                  * associated to another BSS in that case to avoid NULL pointer
 479                  * dereferences. */
 480                 if (bss == hapd || bss == NULL)
 481                         continue;
 482                 sta2 = ap_get_sta(bss, sta->addr);
 483                 if (sta2 && ((sta2->flags & flags) == flags))
 484                         return 1;
 485         }
 486
 487         return 0;
 488 }
 489
 490
 491 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 492                          u16 reason)
 493 {
 494         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 495                    hapd->conf->iface, MAC2STR(sta->addr));
 496         sta->flags &= ~WLAN_STA_ASSOC;
 497         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 498                 ap_sta_remove(hapd, sta);
 499         sta->timeout_next = STA_DEAUTH;
 500         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 501         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 502                                ap_handle_timer, hapd, sta);
 503         accounting_sta_stop(hapd, sta);
 504         ieee802_1x_free_station(sta);
 505
 506         mlme_disassociate_indication(hapd, sta, reason);
 507 }
 508
 509
 510 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 511                            u16 reason)
 512 {
 513         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 514                    hapd->conf->iface, MAC2STR(sta->addr));
 515         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 516         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 517                 ap_sta_remove(hapd, sta);
 518         sta->timeout_next = STA_REMOVE;
 519         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 520         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 521                                ap_handle_timer, hapd, sta);
 522         accounting_sta_stop(hapd, sta);
 523         ieee802_1x_free_station(sta);
 524
 525         mlme_deauthenticate_indication(hapd, sta, reason);
 526 }
 527
 528
 529 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 530                      int old_vlanid)
 531 {
 532         const char *iface;
 533         struct hostapd_vlan *vlan = NULL;
 534
 535         /*
 536          * Do not proceed furthur if the vlan id remains same. We do not want
 537          * duplicate dynamic vlan entries.
 538          */
 539         if (sta->vlan_id == old_vlanid)
 540                 return 0;
 541
 542         /*
 543          * During 1x reauth, if the vlan id changes, then remove the old id and
 544          * proceed furthur to add the new one.
 545          */
 546         if (old_vlanid > 0)
 547                 vlan_remove_dynamic(hapd, old_vlanid);
 548
 549         iface = hapd->conf->iface;
 550         if (sta->ssid->vlan[0])
 551                 iface = sta->ssid->vlan;
 552
 553         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 554                 sta->vlan_id = 0;
 555         else if (sta->vlan_id > 0) {
 556                 vlan = hapd->conf->vlan;
 557                 while (vlan) {
 558                         if (vlan->vlan_id == sta->vlan_id ||
 559                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 560                                 iface = vlan->ifname;
 561                                 break;
 562                         }
 563                         vlan = vlan->next;
 564                 }
 565         }
 566
 567         if (sta->vlan_id > 0 && vlan == NULL) {
 568                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 569                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 570                                "binding station to (vlan_id=%d)",
 571                                sta->vlan_id);
 572                 return -1;
 573         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 574                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 575                 if (vlan == NULL) {
 576                         hostapd_logger(hapd, sta->addr,
 577                                        HOSTAPD_MODULE_IEEE80211,
 578                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 579                                        "dynamic VLAN interface for vlan_id=%d",
 580                                        sta->vlan_id);
 581                         return -1;
 582                 }
 583
 584                 iface = vlan->ifname;
 585                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 586                         hostapd_logger(hapd, sta->addr,
 587                                        HOSTAPD_MODULE_IEEE80211,
 588                                        HOSTAPD_LEVEL_DEBUG, "could not "
 589                                        "configure encryption for dynamic VLAN "
 590                                        "interface for vlan_id=%d",
 591                                        sta->vlan_id);
 592                 }
 593
 594                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 595                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 596                                "interface '%s'", iface);
 597         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 598                 if (sta->vlan_id > 0) {
 599                         vlan->dynamic_vlan++;
 600                         hostapd_logger(hapd, sta->addr,
 601                                        HOSTAPD_MODULE_IEEE80211,
 602                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 603                                        "dynamic VLAN interface '%s'", iface);
 604                 }
 605
 606                 /*
 607                  * Update encryption configuration for statically generated
 608                  * VLAN interface. This is only used for static WEP
 609                  * configuration for the case where hostapd did not yet know
 610                  * which keys are to be used when the interface was added.
 611                  */
 612                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 613                         hostapd_logger(hapd, sta->addr,
 614                                        HOSTAPD_MODULE_IEEE80211,
 615                                        HOSTAPD_LEVEL_DEBUG, "could not "
 616                                        "configure encryption for VLAN "
 617                                        "interface for vlan_id=%d",
 618                                        sta->vlan_id);
 619                 }
 620         }
 621
 622         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 623                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 624                        "'%s'", iface);
 625
 626         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 627                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 628
 629         return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 630 }
 631
 632
 633 #ifdef CONFIG_IEEE80211W
 634
 635 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 636 {
 637         u32 tu;
 638         struct os_time now, passed;
 639         os_get_time(&now);
 640         os_time_sub(&now, &sta->sa_query_start, &passed);
 641         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 642         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 643                 hostapd_logger(hapd, sta->addr,
 644                                HOSTAPD_MODULE_IEEE80211,
 645                                HOSTAPD_LEVEL_DEBUG,
 646                                "association SA Query timed out");
 647                 sta->sa_query_timed_out = 1;
 648                 os_free(sta->sa_query_trans_id);
 649                 sta->sa_query_trans_id = NULL;
 650                 sta->sa_query_count = 0;
 651                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 652                 return 1;
 653         }
 654
 655         return 0;
 656 }
 657
 658
 659 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 660 {
 661         struct hostapd_data *hapd = eloop_ctx;
 662         struct sta_info *sta = timeout_ctx;
 663         unsigned int timeout, sec, usec;
 664         u8 *trans_id, *nbuf;
 665
 666         if (sta->sa_query_count > 0 &&
 667             ap_check_sa_query_timeout(hapd, sta))
 668                 return;
 669
 670         nbuf = os_realloc(sta->sa_query_trans_id,
 671                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 672         if (nbuf == NULL)
 673                 return;
 674         if (sta->sa_query_count == 0) {
 675                 /* Starting a new SA Query procedure */
 676                 os_get_time(&sta->sa_query_start);
 677         }
 678         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 679         sta->sa_query_trans_id = nbuf;
 680         sta->sa_query_count++;
 681
 682         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 683
 684         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 685         sec = ((timeout / 1000) * 1024) / 1000;
 686         usec = (timeout % 1000) * 1024;
 687         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 688
 689         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 690                        HOSTAPD_LEVEL_DEBUG,
 691                        "association SA Query attempt %d", sta->sa_query_count);
 692
 693         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 694 }
 695
 696
 697 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 698 {
 699         ap_sa_query_timer(hapd, sta);
 700 }
 701
 702
 703 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 704 {
 705         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 706         os_free(sta->sa_query_trans_id);
 707         sta->sa_query_trans_id = NULL;
 708         sta->sa_query_count = 0;
 709 }
 710
 711 #endif /* CONFIG_IEEE80211W */