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 "utils/includes.h"
  16
  17 #include "utils/common.h"
  18 #include "utils/eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "radius/radius.h"
  21 #include "radius/radius_client.h"
  22 #include "drivers/driver.h"
  23 #include "p2p/p2p.h"
  24 #include "hostapd.h"
  25 #include "accounting.h"
  26 #include "ieee802_1x.h"
  27 #include "ieee802_11.h"
  28 #include "wpa_auth.h"
  29 #include "preauth_auth.h"
  30 #include "ap_config.h"
  31 #include "beacon.h"
  32 #include "ap_mlme.h"
  33 #include "vlan_init.h"
  34 #include "sta_info.h"
  35
  36 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
  37                                        struct sta_info *sta);
  38 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  39 #ifdef CONFIG_IEEE80211W
  40 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  41 #endif /* CONFIG_IEEE80211W */
  42
  43 int ap_for_each_sta(struct hostapd_data *hapd,
  44                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  45                               void *ctx),
  46                     void *ctx)
  47 {
  48         struct sta_info *sta;
  49
  50         for (sta = hapd->sta_list; sta; sta = sta->next) {
  51                 if (cb(hapd, sta, ctx))
  52                         return 1;
  53         }
  54
  55         return 0;
  56 }
  57
  58
  59 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  60 {
  61         struct sta_info *s;
  62
  63         s = hapd->sta_hash[STA_HASH(sta)];
  64         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  65                 s = s->hnext;
  66         return s;
  67 }
  68
  69
  70 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  71 {
  72         struct sta_info *tmp;
  73
  74         if (hapd->sta_list == sta) {
  75                 hapd->sta_list = sta->next;
  76                 return;
  77         }
  78
  79         tmp = hapd->sta_list;
  80         while (tmp != NULL && tmp->next != sta)
  81                 tmp = tmp->next;
  82         if (tmp == NULL) {
  83                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
  84                            "list.", MAC2STR(sta->addr));
  85         } else
  86                 tmp->next = sta->next;
  87 }
  88
  89
  90 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
  91 {
  92         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
  93         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
  94 }
  95
  96
  97 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
  98 {
  99         struct sta_info *s;
 100
 101         s = hapd->sta_hash[STA_HASH(sta->addr)];
 102         if (s == NULL) return;
 103         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 104                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 105                 return;
 106         }
 107
 108         while (s->hnext != NULL &&
 109                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 110                 s = s->hnext;
 111         if (s->hnext != NULL)
 112                 s->hnext = s->hnext->hnext;
 113         else
 114                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 115                            " from hash table", MAC2STR(sta->addr));
 116 }
 117
 118
 119 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 120 {
 121         int set_beacon = 0;
 122
 123         accounting_sta_stop(hapd, sta);
 124
 125         if (sta->flags & WLAN_STA_WDS)
 126                 hapd->drv.set_wds_sta(hapd, sta->addr, sta->aid, 0);
 127
 128         if (!(sta->flags & WLAN_STA_PREAUTH))
 129                 hapd->drv.sta_remove(hapd, sta->addr);
 130
 131         ap_sta_hash_del(hapd, sta);
 132         ap_sta_list_del(hapd, sta);
 133
 134         if (sta->aid > 0)
 135                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 136                         ~BIT((sta->aid - 1) % 32);
 137
 138         hapd->num_sta--;
 139         if (sta->nonerp_set) {
 140                 sta->nonerp_set = 0;
 141                 hapd->iface->num_sta_non_erp--;
 142                 if (hapd->iface->num_sta_non_erp == 0)
 143                         set_beacon++;
 144         }
 145
 146         if (sta->no_short_slot_time_set) {
 147                 sta->no_short_slot_time_set = 0;
 148                 hapd->iface->num_sta_no_short_slot_time--;
 149                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 150                     && hapd->iface->num_sta_no_short_slot_time == 0)
 151                         set_beacon++;
 152         }
 153
 154         if (sta->no_short_preamble_set) {
 155                 sta->no_short_preamble_set = 0;
 156                 hapd->iface->num_sta_no_short_preamble--;
 157                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 158                     && hapd->iface->num_sta_no_short_preamble == 0)
 159                         set_beacon++;
 160         }
 161
 162         if (sta->no_ht_gf_set) {
 163                 sta->no_ht_gf_set = 0;
 164                 hapd->iface->num_sta_ht_no_gf--;
 165         }
 166
 167         if (sta->no_ht_set) {
 168                 sta->no_ht_set = 0;
 169                 hapd->iface->num_sta_no_ht--;
 170         }
 171
 172         if (sta->ht_20mhz_set) {
 173                 sta->ht_20mhz_set = 0;
 174                 hapd->iface->num_sta_ht_20mhz--;
 175         }
 176
 177 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 178         if (hostapd_ht_operation_update(hapd->iface) > 0)
 179                 set_beacon++;
 180 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 181
 182         if (set_beacon)
 183                 ieee802_11_set_beacons(hapd->iface);
 184
 185         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 186         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 187
 188         ieee802_1x_free_station(sta);
 189         wpa_auth_sta_deinit(sta->wpa_sm);
 190         rsn_preauth_free_station(hapd, sta);
 191 #ifndef CONFIG_NO_RADIUS
 192         radius_client_flush_auth(hapd->radius, sta->addr);
 193 #endif /* CONFIG_NO_RADIUS */
 194
 195         os_free(sta->last_assoc_req);
 196         os_free(sta->challenge);
 197
 198 #ifdef CONFIG_IEEE80211W
 199         os_free(sta->sa_query_trans_id);
 200         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 201 #endif /* CONFIG_IEEE80211W */
 202
 203 #ifdef CONFIG_P2P
 204         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 205 #endif /* CONFIG_P2P */
 206
 207         wpabuf_free(sta->wps_ie);
 208         wpabuf_free(sta->p2p_ie);
 209
 210         os_free(sta->ht_capabilities);
 211
 212         os_free(sta);
 213 }
 214
 215
 216 void hostapd_free_stas(struct hostapd_data *hapd)
 217 {
 218         struct sta_info *sta, *prev;
 219
 220         sta = hapd->sta_list;
 221
 222         while (sta) {
 223                 prev = sta;
 224                 if (sta->flags & WLAN_STA_AUTH) {
 225                         mlme_deauthenticate_indication(
 226                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 227                 }
 228                 sta = sta->next;
 229                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 230                            MAC2STR(prev->addr));
 231                 ap_free_sta(hapd, prev);
 232         }
 233 }
 234
 235
 236 /**
 237  * ap_handle_timer - Per STA timer handler
 238  * @eloop_ctx: struct hostapd_data *
 239  * @timeout_ctx: struct sta_info *
 240  *
 241  * This function is called to check station activity and to remove inactive
 242  * stations.
 243  */
 244 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 245 {
 246         struct hostapd_data *hapd = eloop_ctx;
 247         struct sta_info *sta = timeout_ctx;
 248         unsigned long next_time = 0;
 249
 250         if (sta->timeout_next == STA_REMOVE) {
 251                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 252                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 253                                "local deauth request");
 254                 ap_free_sta(hapd, sta);
 255                 return;
 256         }
 257
 258         if ((sta->flags & WLAN_STA_ASSOC) &&
 259             (sta->timeout_next == STA_NULLFUNC ||
 260              sta->timeout_next == STA_DISASSOC)) {
 261                 int inactive_sec;
 262                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
 263                            MAC2STR(sta->addr));
 264                 inactive_sec = hapd->drv.get_inact_sec(hapd, sta->addr);
 265                 if (inactive_sec == -1) {
 266                         wpa_printf(MSG_DEBUG, "Could not get station info "
 267                                    "from kernel driver for " MACSTR ".",
 268                                    MAC2STR(sta->addr));
 269                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 270                            sta->flags & WLAN_STA_ASSOC) {
 271                         /* station activity detected; reset timeout state */
 272                         wpa_printf(MSG_DEBUG, "  Station has been active");
 273                         sta->timeout_next = STA_NULLFUNC;
 274                         next_time = hapd->conf->ap_max_inactivity -
 275                                 inactive_sec;
 276                 }
 277         }
 278
 279         if ((sta->flags & WLAN_STA_ASSOC) &&
 280             sta->timeout_next == STA_DISASSOC &&
 281             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 282                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
 283                 /* data nullfunc frame poll did not produce TX errors; assume
 284                  * station ACKed it */
 285                 sta->timeout_next = STA_NULLFUNC;
 286                 next_time = hapd->conf->ap_max_inactivity;
 287         }
 288
 289         if (next_time) {
 290                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 291                                        sta);
 292                 return;
 293         }
 294
 295         if (sta->timeout_next == STA_NULLFUNC &&
 296             (sta->flags & WLAN_STA_ASSOC)) {
 297 #ifndef CONFIG_NATIVE_WINDOWS
 298                 /* send data frame to poll STA and check whether this frame
 299                  * is ACKed */
 300                 struct ieee80211_hdr hdr;
 301
 302                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 303                 sta->flags |= WLAN_STA_PENDING_POLL;
 304
 305                 os_memset(&hdr, 0, sizeof(hdr));
 306                 if (hapd->driver &&
 307                     os_strcmp(hapd->driver->name, "hostap") == 0) {
 308                         /*
 309                          * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
 310                          * but it is apparently not retried so TX Exc events
 311                          * are not received for it.
 312                          */
 313                         hdr.frame_control =
 314                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 315                                              WLAN_FC_STYPE_DATA);
 316                 } else {
 317                         hdr.frame_control =
 318                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 319                                              WLAN_FC_STYPE_NULLFUNC);
 320                 }
 321
 322                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 323                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 324                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 325                           ETH_ALEN);
 326                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 327
 328                 if (hapd->drv.send_mgmt_frame(hapd, &hdr, sizeof(hdr)) < 0)
 329                         perror("ap_handle_timer: send");
 330 #endif /* CONFIG_NATIVE_WINDOWS */
 331         } else if (sta->timeout_next != STA_REMOVE) {
 332                 int deauth = sta->timeout_next == STA_DEAUTH;
 333
 334                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 335                            deauth ? "deauthentication" : "disassociation",
 336                            MAC2STR(sta->addr));
 337
 338                 if (deauth) {
 339                         hapd->drv.sta_deauth(hapd, sta->addr,
 340                                              WLAN_REASON_PREV_AUTH_NOT_VALID);
 341                 } else {
 342                         hapd->drv.sta_disassoc(
 343                                 hapd, sta->addr,
 344                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 345                 }
 346         }
 347
 348         switch (sta->timeout_next) {
 349         case STA_NULLFUNC:
 350                 sta->timeout_next = STA_DISASSOC;
 351                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 352                                        hapd, sta);
 353                 break;
 354         case STA_DISASSOC:
 355                 sta->flags &= ~WLAN_STA_ASSOC;
 356                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 357                 if (!sta->acct_terminate_cause)
 358                         sta->acct_terminate_cause =
 359                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 360                 accounting_sta_stop(hapd, sta);
 361                 ieee802_1x_free_station(sta);
 362                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 363                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 364                                "inactivity");
 365                 sta->timeout_next = STA_DEAUTH;
 366                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 367                                        hapd, sta);
 368                 mlme_disassociate_indication(
 369                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 370                 break;
 371         case STA_DEAUTH:
 372         case STA_REMOVE:
 373                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 374                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 375                                "inactivity");
 376                 if (!sta->acct_terminate_cause)
 377                         sta->acct_terminate_cause =
 378                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 379                 mlme_deauthenticate_indication(
 380                         hapd, sta,
 381                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 382                 ap_free_sta(hapd, sta);
 383                 break;
 384         }
 385 }
 386
 387
 388 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 389 {
 390         struct hostapd_data *hapd = eloop_ctx;
 391         struct sta_info *sta = timeout_ctx;
 392         u8 addr[ETH_ALEN];
 393
 394         if (!(sta->flags & WLAN_STA_AUTH))
 395                 return;
 396
 397         mlme_deauthenticate_indication(hapd, sta,
 398                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 399         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 400                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 401                        "session timeout");
 402         sta->acct_terminate_cause =
 403                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 404         os_memcpy(addr, sta->addr, ETH_ALEN);
 405         ap_free_sta(hapd, sta);
 406         hapd->drv.sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 407 }
 408
 409
 410 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 411                             u32 session_timeout)
 412 {
 413         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 414                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 415                        "seconds", session_timeout);
 416         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 417         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 418                                hapd, sta);
 419 }
 420
 421
 422 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 423 {
 424         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 425 }
 426
 427
 428 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 429 {
 430         struct sta_info *sta;
 431
 432         sta = ap_get_sta(hapd, addr);
 433         if (sta)
 434                 return sta;
 435
 436         wpa_printf(MSG_DEBUG, "  New STA");
 437         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 438                 /* FIX: might try to remove some old STAs first? */
 439                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 440                            hapd->num_sta, hapd->conf->max_num_sta);
 441                 return NULL;
 442         }
 443
 444         sta = os_zalloc(sizeof(struct sta_info));
 445         if (sta == NULL) {
 446                 wpa_printf(MSG_ERROR, "malloc failed");
 447                 return NULL;
 448         }
 449         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 450
 451         /* initialize STA info data */
 452         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 453                                ap_handle_timer, hapd, sta);
 454         os_memcpy(sta->addr, addr, ETH_ALEN);
 455         sta->next = hapd->sta_list;
 456         hapd->sta_list = sta;
 457         hapd->num_sta++;
 458         ap_sta_hash_add(hapd, sta);
 459         sta->ssid = &hapd->conf->ssid;
 460         ap_sta_remove_in_other_bss(hapd, sta);
 461
 462         return sta;
 463 }
 464
 465
 466 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 467 {
 468         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 469
 470         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 471                    MAC2STR(sta->addr));
 472         if (hapd->drv.sta_remove(hapd, sta->addr) &&
 473             sta->flags & WLAN_STA_ASSOC) {
 474                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 475                            " from kernel driver.", MAC2STR(sta->addr));
 476                 return -1;
 477         }
 478         return 0;
 479 }
 480
 481
 482 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 483                                        struct sta_info *sta)
 484 {
 485         struct hostapd_iface *iface = hapd->iface;
 486         size_t i;
 487
 488         for (i = 0; i < iface->num_bss; i++) {
 489                 struct hostapd_data *bss = iface->bss[i];
 490                 struct sta_info *sta2;
 491                 /* bss should always be set during operation, but it may be
 492                  * NULL during reconfiguration. Assume the STA is not
 493                  * associated to another BSS in that case to avoid NULL pointer
 494                  * dereferences. */
 495                 if (bss == hapd || bss == NULL)
 496                         continue;
 497                 sta2 = ap_get_sta(bss, sta->addr);
 498                 if (!sta2)
 499                         continue;
 500
 501                 ap_sta_disconnect(bss, sta2, sta2->addr,
 502                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 503         }
 504 }
 505
 506
 507 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 508                          u16 reason)
 509 {
 510         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 511                    hapd->conf->iface, MAC2STR(sta->addr));
 512         sta->flags &= ~WLAN_STA_ASSOC;
 513         ap_sta_remove(hapd, sta);
 514         sta->timeout_next = STA_DEAUTH;
 515         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 516         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 517                                ap_handle_timer, hapd, sta);
 518         accounting_sta_stop(hapd, sta);
 519         ieee802_1x_free_station(sta);
 520
 521         mlme_disassociate_indication(hapd, sta, reason);
 522 }
 523
 524
 525 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 526                            u16 reason)
 527 {
 528         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 529                    hapd->conf->iface, MAC2STR(sta->addr));
 530         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 531         ap_sta_remove(hapd, sta);
 532         sta->timeout_next = STA_REMOVE;
 533         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 534         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 535                                ap_handle_timer, hapd, sta);
 536         accounting_sta_stop(hapd, sta);
 537         ieee802_1x_free_station(sta);
 538
 539         mlme_deauthenticate_indication(hapd, sta, reason);
 540 }
 541
 542
 543 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 544                      int old_vlanid)
 545 {
 546 #ifndef CONFIG_NO_VLAN
 547         const char *iface;
 548         struct hostapd_vlan *vlan = NULL;
 549         int ret;
 550
 551         /*
 552          * Do not proceed furthur if the vlan id remains same. We do not want
 553          * duplicate dynamic vlan entries.
 554          */
 555         if (sta->vlan_id == old_vlanid)
 556                 return 0;
 557
 558         /*
 559          * During 1x reauth, if the vlan id changes, then remove the old id and
 560          * proceed furthur to add the new one.
 561          */
 562         if (old_vlanid > 0)
 563                 vlan_remove_dynamic(hapd, old_vlanid);
 564
 565         iface = hapd->conf->iface;
 566         if (sta->ssid->vlan[0])
 567                 iface = sta->ssid->vlan;
 568
 569         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 570                 sta->vlan_id = 0;
 571         else if (sta->vlan_id > 0) {
 572                 vlan = hapd->conf->vlan;
 573                 while (vlan) {
 574                         if (vlan->vlan_id == sta->vlan_id ||
 575                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 576                                 iface = vlan->ifname;
 577                                 break;
 578                         }
 579                         vlan = vlan->next;
 580                 }
 581         }
 582
 583         if (sta->vlan_id > 0 && vlan == NULL) {
 584                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 585                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 586                                "binding station to (vlan_id=%d)",
 587                                sta->vlan_id);
 588                 return -1;
 589         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 590                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 591                 if (vlan == NULL) {
 592                         hostapd_logger(hapd, sta->addr,
 593                                        HOSTAPD_MODULE_IEEE80211,
 594                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 595                                        "dynamic VLAN interface for vlan_id=%d",
 596                                        sta->vlan_id);
 597                         return -1;
 598                 }
 599
 600                 iface = vlan->ifname;
 601                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 602                         hostapd_logger(hapd, sta->addr,
 603                                        HOSTAPD_MODULE_IEEE80211,
 604                                        HOSTAPD_LEVEL_DEBUG, "could not "
 605                                        "configure encryption for dynamic VLAN "
 606                                        "interface for vlan_id=%d",
 607                                        sta->vlan_id);
 608                 }
 609
 610                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 611                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 612                                "interface '%s'", iface);
 613         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 614                 if (sta->vlan_id > 0) {
 615                         vlan->dynamic_vlan++;
 616                         hostapd_logger(hapd, sta->addr,
 617                                        HOSTAPD_MODULE_IEEE80211,
 618                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 619                                        "dynamic VLAN interface '%s'", iface);
 620                 }
 621
 622                 /*
 623                  * Update encryption configuration for statically generated
 624                  * VLAN interface. This is only used for static WEP
 625                  * configuration for the case where hostapd did not yet know
 626                  * which keys are to be used when the interface was added.
 627                  */
 628                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 629                         hostapd_logger(hapd, sta->addr,
 630                                        HOSTAPD_MODULE_IEEE80211,
 631                                        HOSTAPD_LEVEL_DEBUG, "could not "
 632                                        "configure encryption for VLAN "
 633                                        "interface for vlan_id=%d",
 634                                        sta->vlan_id);
 635                 }
 636         }
 637
 638         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 639                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 640                        "'%s'", iface);
 641
 642         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 643                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 644
 645         ret = hapd->drv.set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 646         if (ret < 0) {
 647                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 648                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 649                                "entry to vlan_id=%d", sta->vlan_id);
 650         }
 651         return ret;
 652 #else /* CONFIG_NO_VLAN */
 653         return 0;
 654 #endif /* CONFIG_NO_VLAN */
 655 }
 656
 657
 658 #ifdef CONFIG_IEEE80211W
 659
 660 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 661 {
 662         u32 tu;
 663         struct os_time now, passed;
 664         os_get_time(&now);
 665         os_time_sub(&now, &sta->sa_query_start, &passed);
 666         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 667         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 668                 hostapd_logger(hapd, sta->addr,
 669                                HOSTAPD_MODULE_IEEE80211,
 670                                HOSTAPD_LEVEL_DEBUG,
 671                                "association SA Query timed out");
 672                 sta->sa_query_timed_out = 1;
 673                 os_free(sta->sa_query_trans_id);
 674                 sta->sa_query_trans_id = NULL;
 675                 sta->sa_query_count = 0;
 676                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 677                 return 1;
 678         }
 679
 680         return 0;
 681 }
 682
 683
 684 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 685 {
 686         struct hostapd_data *hapd = eloop_ctx;
 687         struct sta_info *sta = timeout_ctx;
 688         unsigned int timeout, sec, usec;
 689         u8 *trans_id, *nbuf;
 690
 691         if (sta->sa_query_count > 0 &&
 692             ap_check_sa_query_timeout(hapd, sta))
 693                 return;
 694
 695         nbuf = os_realloc(sta->sa_query_trans_id,
 696                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 697         if (nbuf == NULL)
 698                 return;
 699         if (sta->sa_query_count == 0) {
 700                 /* Starting a new SA Query procedure */
 701                 os_get_time(&sta->sa_query_start);
 702         }
 703         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 704         sta->sa_query_trans_id = nbuf;
 705         sta->sa_query_count++;
 706
 707         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 708
 709         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 710         sec = ((timeout / 1000) * 1024) / 1000;
 711         usec = (timeout % 1000) * 1024;
 712         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 713
 714         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 715                        HOSTAPD_LEVEL_DEBUG,
 716                        "association SA Query attempt %d", sta->sa_query_count);
 717
 718 #ifdef NEED_AP_MLME
 719         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 720 #endif /* NEED_AP_MLME */
 721 }
 722
 723
 724 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 725 {
 726         ap_sa_query_timer(hapd, sta);
 727 }
 728
 729
 730 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 731 {
 732         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 733         os_free(sta->sa_query_trans_id);
 734         sta->sa_query_trans_id = NULL;
 735         sta->sa_query_count = 0;
 736 }
 737
 738 #endif /* CONFIG_IEEE80211W */
 739
 740
 741 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 742                        const u8 *addr, u16 reason)
 743 {
 744
 745         if (sta == NULL && addr)
 746                 sta = ap_get_sta(hapd, addr);
 747
 748         if (addr)
 749                 hapd->drv.sta_deauth(hapd, addr, reason);
 750
 751         if (sta == NULL)
 752                 return;
 753         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_AUTHORIZED);
 754         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 755         eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
 756         sta->timeout_next = STA_REMOVE;
 757 }