git.maemo.org Git - wpasupplicant/blob - 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_i.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                 /* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
 292                  * it is apparently not retried so TX Exc events are not
 293                  * received for it */
 294                 os_memset(&hdr, 0, sizeof(hdr));
 295                 hdr.frame_control =
 296                         IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 297                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 298                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 299                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 300                           ETH_ALEN);
 301                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 302
 303                 if (hostapd_send_mgmt_frame(hapd, &hdr, sizeof(hdr), 0) < 0)
 304                         perror("ap_handle_timer: send");
 305 #endif /* CONFIG_NATIVE_WINDOWS */
 306         } else if (sta->timeout_next != STA_REMOVE) {
 307                 int deauth = sta->timeout_next == STA_DEAUTH;
 308
 309                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 310                            deauth ? "deauthentication" : "disassociation",
 311                            MAC2STR(sta->addr));
 312
 313                 if (deauth) {
 314                         hostapd_sta_deauth(hapd, sta->addr,
 315                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 316                 } else {
 317                         hostapd_sta_disassoc(
 318                                 hapd, sta->addr,
 319                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 320                 }
 321         }
 322
 323         switch (sta->timeout_next) {
 324         case STA_NULLFUNC:
 325                 sta->timeout_next = STA_DISASSOC;
 326                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 327                                        hapd, sta);
 328                 break;
 329         case STA_DISASSOC:
 330                 sta->flags &= ~WLAN_STA_ASSOC;
 331                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 332                 if (!sta->acct_terminate_cause)
 333                         sta->acct_terminate_cause =
 334                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 335                 accounting_sta_stop(hapd, sta);
 336                 ieee802_1x_free_station(sta);
 337                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 338                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 339                                "inactivity");
 340                 sta->timeout_next = STA_DEAUTH;
 341                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 342                                        hapd, sta);
 343                 mlme_disassociate_indication(
 344                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 345                 break;
 346         case STA_DEAUTH:
 347         case STA_REMOVE:
 348                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 349                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 350                                "inactivity");
 351                 if (!sta->acct_terminate_cause)
 352                         sta->acct_terminate_cause =
 353                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 354                 mlme_deauthenticate_indication(
 355                         hapd, sta,
 356                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 357                 ap_free_sta(hapd, sta);
 358                 break;
 359         }
 360 }
 361
 362
 363 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 364 {
 365         struct hostapd_data *hapd = eloop_ctx;
 366         struct sta_info *sta = timeout_ctx;
 367         u8 addr[ETH_ALEN];
 368
 369         if (!(sta->flags & WLAN_STA_AUTH))
 370                 return;
 371
 372         mlme_deauthenticate_indication(hapd, sta,
 373                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 374         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 375                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 376                        "session timeout");
 377         sta->acct_terminate_cause =
 378                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 379         os_memcpy(addr, sta->addr, ETH_ALEN);
 380         ap_free_sta(hapd, sta);
 381         hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 382 }
 383
 384
 385 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 386                             u32 session_timeout)
 387 {
 388         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 389                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 390                        "seconds", session_timeout);
 391         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 392         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 393                                hapd, sta);
 394 }
 395
 396
 397 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 398 {
 399         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 400 }
 401
 402
 403 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 404 {
 405         struct sta_info *sta;
 406
 407         sta = ap_get_sta(hapd, addr);
 408         if (sta)
 409                 return sta;
 410
 411         wpa_printf(MSG_DEBUG, "  New STA");
 412         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 413                 /* FIX: might try to remove some old STAs first? */
 414                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 415                            hapd->num_sta, hapd->conf->max_num_sta);
 416                 return NULL;
 417         }
 418
 419         sta = os_zalloc(sizeof(struct sta_info));
 420         if (sta == NULL) {
 421                 wpa_printf(MSG_ERROR, "malloc failed");
 422                 return NULL;
 423         }
 424         sta->acct_interim_interval = hapd->conf->radius->acct_interim_interval;
 425
 426         /* initialize STA info data */
 427         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 428                                ap_handle_timer, hapd, sta);
 429         os_memcpy(sta->addr, addr, ETH_ALEN);
 430         sta->next = hapd->sta_list;
 431         hapd->sta_list = sta;
 432         hapd->num_sta++;
 433         ap_sta_hash_add(hapd, sta);
 434         sta->ssid = &hapd->conf->ssid;
 435
 436         return sta;
 437 }
 438
 439
 440 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 441 {
 442         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 443
 444         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 445                    MAC2STR(sta->addr));
 446         if (hostapd_sta_remove(hapd, sta->addr) &&
 447             sta->flags & WLAN_STA_ASSOC) {
 448                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 449                            " from kernel driver.", MAC2STR(sta->addr));
 450                 return -1;
 451         }
 452         return 0;
 453 }
 454
 455
 456 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
 457                                struct sta_info *sta, u32 flags)
 458 {
 459         struct hostapd_iface *iface = hapd->iface;
 460         size_t i;
 461
 462         for (i = 0; i < iface->num_bss; i++) {
 463                 struct hostapd_data *bss = iface->bss[i];
 464                 struct sta_info *sta2;
 465                 /* bss should always be set during operation, but it may be
 466                  * NULL during reconfiguration. Assume the STA is not
 467                  * associated to another BSS in that case to avoid NULL pointer
 468                  * dereferences. */
 469                 if (bss == hapd || bss == NULL)
 470                         continue;
 471                 sta2 = ap_get_sta(bss, sta->addr);
 472                 if (sta2 && ((sta2->flags & flags) == flags))
 473                         return 1;
 474         }
 475
 476         return 0;
 477 }
 478
 479
 480 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 481                          u16 reason)
 482 {
 483         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 484                    hapd->conf->iface, MAC2STR(sta->addr));
 485         sta->flags &= ~WLAN_STA_ASSOC;
 486         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 487                 ap_sta_remove(hapd, sta);
 488         sta->timeout_next = STA_DEAUTH;
 489         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 490         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 491                                ap_handle_timer, hapd, sta);
 492         accounting_sta_stop(hapd, sta);
 493         ieee802_1x_free_station(sta);
 494
 495         mlme_disassociate_indication(hapd, sta, reason);
 496 }
 497
 498
 499 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 500                            u16 reason)
 501 {
 502         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 503                    hapd->conf->iface, MAC2STR(sta->addr));
 504         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 505         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 506                 ap_sta_remove(hapd, sta);
 507         sta->timeout_next = STA_REMOVE;
 508         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 509         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 510                                ap_handle_timer, hapd, sta);
 511         accounting_sta_stop(hapd, sta);
 512         ieee802_1x_free_station(sta);
 513
 514         mlme_deauthenticate_indication(hapd, sta, reason);
 515 }
 516
 517
 518 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 519                      int old_vlanid)
 520 {
 521 #ifndef CONFIG_NO_VLAN
 522         const char *iface;
 523         struct hostapd_vlan *vlan = NULL;
 524
 525         /*
 526          * Do not proceed furthur if the vlan id remains same. We do not want
 527          * duplicate dynamic vlan entries.
 528          */
 529         if (sta->vlan_id == old_vlanid)
 530                 return 0;
 531
 532         /*
 533          * During 1x reauth, if the vlan id changes, then remove the old id and
 534          * proceed furthur to add the new one.
 535          */
 536         if (old_vlanid > 0)
 537                 vlan_remove_dynamic(hapd, old_vlanid);
 538
 539         iface = hapd->conf->iface;
 540         if (sta->ssid->vlan[0])
 541                 iface = sta->ssid->vlan;
 542
 543         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 544                 sta->vlan_id = 0;
 545         else if (sta->vlan_id > 0) {
 546                 vlan = hapd->conf->vlan;
 547                 while (vlan) {
 548                         if (vlan->vlan_id == sta->vlan_id ||
 549                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 550                                 iface = vlan->ifname;
 551                                 break;
 552                         }
 553                         vlan = vlan->next;
 554                 }
 555         }
 556
 557         if (sta->vlan_id > 0 && vlan == NULL) {
 558                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 559                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 560                                "binding station to (vlan_id=%d)",
 561                                sta->vlan_id);
 562                 return -1;
 563         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 564                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 565                 if (vlan == NULL) {
 566                         hostapd_logger(hapd, sta->addr,
 567                                        HOSTAPD_MODULE_IEEE80211,
 568                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 569                                        "dynamic VLAN interface for vlan_id=%d",
 570                                        sta->vlan_id);
 571                         return -1;
 572                 }
 573
 574                 iface = vlan->ifname;
 575                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 576                         hostapd_logger(hapd, sta->addr,
 577                                        HOSTAPD_MODULE_IEEE80211,
 578                                        HOSTAPD_LEVEL_DEBUG, "could not "
 579                                        "configure encryption for dynamic VLAN "
 580                                        "interface for vlan_id=%d",
 581                                        sta->vlan_id);
 582                 }
 583
 584                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 585                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 586                                "interface '%s'", iface);
 587         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 588                 if (sta->vlan_id > 0) {
 589                         vlan->dynamic_vlan++;
 590                         hostapd_logger(hapd, sta->addr,
 591                                        HOSTAPD_MODULE_IEEE80211,
 592                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 593                                        "dynamic VLAN interface '%s'", iface);
 594                 }
 595
 596                 /*
 597                  * Update encryption configuration for statically generated
 598                  * VLAN interface. This is only used for static WEP
 599                  * configuration for the case where hostapd did not yet know
 600                  * which keys are to be used when the interface was added.
 601                  */
 602                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 603                         hostapd_logger(hapd, sta->addr,
 604                                        HOSTAPD_MODULE_IEEE80211,
 605                                        HOSTAPD_LEVEL_DEBUG, "could not "
 606                                        "configure encryption for VLAN "
 607                                        "interface for vlan_id=%d",
 608                                        sta->vlan_id);
 609                 }
 610         }
 611
 612         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 613                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 614                        "'%s'", iface);
 615
 616         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 617                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 618
 619         return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 620 #else /* CONFIG_NO_VLAN */
 621         return 0;
 622 #endif /* CONFIG_NO_VLAN */
 623 }
 624
 625
 626 #ifdef CONFIG_IEEE80211W
 627
 628 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 629 {
 630         u32 tu;
 631         struct os_time now, passed;
 632         os_get_time(&now);
 633         os_time_sub(&now, &sta->sa_query_start, &passed);
 634         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 635         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 636                 hostapd_logger(hapd, sta->addr,
 637                                HOSTAPD_MODULE_IEEE80211,
 638                                HOSTAPD_LEVEL_DEBUG,
 639                                "association SA Query timed out");
 640                 sta->sa_query_timed_out = 1;
 641                 os_free(sta->sa_query_trans_id);
 642                 sta->sa_query_trans_id = NULL;
 643                 sta->sa_query_count = 0;
 644                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 645                 return 1;
 646         }
 647
 648         return 0;
 649 }
 650
 651
 652 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 653 {
 654         struct hostapd_data *hapd = eloop_ctx;
 655         struct sta_info *sta = timeout_ctx;
 656         unsigned int timeout, sec, usec;
 657         u8 *trans_id, *nbuf;
 658
 659         if (sta->sa_query_count > 0 &&
 660             ap_check_sa_query_timeout(hapd, sta))
 661                 return;
 662
 663         nbuf = os_realloc(sta->sa_query_trans_id,
 664                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 665         if (nbuf == NULL)
 666                 return;
 667         if (sta->sa_query_count == 0) {
 668                 /* Starting a new SA Query procedure */
 669                 os_get_time(&sta->sa_query_start);
 670         }
 671         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 672         sta->sa_query_trans_id = nbuf;
 673         sta->sa_query_count++;
 674
 675         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 676
 677         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 678         sec = ((timeout / 1000) * 1024) / 1000;
 679         usec = (timeout % 1000) * 1024;
 680         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 681
 682         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 683                        HOSTAPD_LEVEL_DEBUG,
 684                        "association SA Query attempt %d", sta->sa_query_count);
 685
 686         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 687 }
 688
 689
 690 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 691 {
 692         ap_sa_query_timer(hapd, sta);
 693 }
 694
 695
 696 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 697 {
 698         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 699         os_free(sta->sa_query_trans_id);
 700         sta->sa_query_trans_id = NULL;
 701         sta->sa_query_count = 0;
 702 }
 703
 704 #endif /* CONFIG_IEEE80211W */