wpa_supplicant_node: sta_info.c Source File

00001 /*
00002  * hostapd / Station table
00003  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
00004  *
00005  * This program is free software; you can redistribute it and/or modify
00006  * it under the terms of the GNU General Public License version 2 as
00007  * published by the Free Software Foundation.
00008  *
00009  * Alternatively, this software may be distributed under the terms of BSD
00010  * license.
00011  *
00012  * See README and COPYING for more details.
00013  */
00014 
00015 #include "utils/includes.h"
00016 
00017 #include "utils/common.h"
00018 #include "utils/eloop.h"
00019 #include "common/ieee802_11_defs.h"
00020 #include "radius/radius.h"
00021 #include "radius/radius_client.h"
00022 #include "drivers/driver.h"
00023 #include "hostapd.h"
00024 #include "accounting.h"
00025 #include "ieee802_1x.h"
00026 #include "ieee802_11.h"
00027 #include "wpa_auth.h"
00028 #include "preauth_auth.h"
00029 #include "ap_config.h"
00030 #include "beacon.h"
00031 #include "ap_mlme.h"
00032 #include "vlan_init.h"
00033 #include "sta_info.h"
00034 
00035 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
00036                                        struct sta_info *sta);
00037 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
00038 #ifdef CONFIG_IEEE80211W
00039 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
00040 #endif /* CONFIG_IEEE80211W */
00041 
00042 int ap_for_each_sta(struct hostapd_data *hapd,
00043                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
00044                               void *ctx),
00045                     void *ctx)
00046 {
00047         struct sta_info *sta;
00048 
00049         for (sta = hapd->sta_list; sta; sta = sta->next) {
00050                 if (cb(hapd, sta, ctx))
00051                         return 1;
00052         }
00053 
00054         return 0;
00055 }
00056 
00057 
00058 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
00059 {
00060         struct sta_info *s;
00061 
00062         s = hapd->sta_hash[STA_HASH(sta)];
00063         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
00064                 s = s->hnext;
00065         return s;
00066 }
00067 
00068 
00069 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
00070 {
00071         struct sta_info *tmp;
00072 
00073         if (hapd->sta_list == sta) {
00074                 hapd->sta_list = sta->next;
00075                 return;
00076         }
00077 
00078         tmp = hapd->sta_list;
00079         while (tmp != NULL && tmp->next != sta)
00080                 tmp = tmp->next;
00081         if (tmp == NULL) {
00082                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
00083                            "list.", MAC2STR(sta->addr));
00084         } else
00085                 tmp->next = sta->next;
00086 }
00087 
00088 
00089 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
00090 {
00091         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
00092         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
00093 }
00094 
00095 
00096 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
00097 {
00098         struct sta_info *s;
00099 
00100         s = hapd->sta_hash[STA_HASH(sta->addr)];
00101         if (s == NULL) return;
00102         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
00103                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
00104                 return;
00105         }
00106 
00107         while (s->hnext != NULL &&
00108                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
00109                 s = s->hnext;
00110         if (s->hnext != NULL)
00111                 s->hnext = s->hnext->hnext;
00112         else
00113                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
00114                            " from hash table", MAC2STR(sta->addr));
00115 }
00116 
00117 
00118 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
00119 {
00120         int set_beacon = 0;
00121 
00122         accounting_sta_stop(hapd, sta);
00123 
00124         if (sta->flags & WLAN_STA_WDS)
00125                 hapd->drv.set_wds_sta(hapd, sta->addr, sta->aid, 0);
00126 
00127         if (!(sta->flags & WLAN_STA_PREAUTH))
00128                 hapd->drv.sta_remove(hapd, sta->addr);
00129 
00130         ap_sta_hash_del(hapd, sta);
00131         ap_sta_list_del(hapd, sta);
00132 
00133         if (sta->aid > 0)
00134                 hapd->sta_aid[(sta->aid - 1) / 32] &=
00135                         ~BIT((sta->aid - 1) % 32);
00136 
00137         hapd->num_sta--;
00138         if (sta->nonerp_set) {
00139                 sta->nonerp_set = 0;
00140                 hapd->iface->num_sta_non_erp--;
00141                 if (hapd->iface->num_sta_non_erp == 0)
00142                         set_beacon++;
00143         }
00144 
00145         if (sta->no_short_slot_time_set) {
00146                 sta->no_short_slot_time_set = 0;
00147                 hapd->iface->num_sta_no_short_slot_time--;
00148                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
00149                     && hapd->iface->num_sta_no_short_slot_time == 0)
00150                         set_beacon++;
00151         }
00152 
00153         if (sta->no_short_preamble_set) {
00154                 sta->no_short_preamble_set = 0;
00155                 hapd->iface->num_sta_no_short_preamble--;
00156                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
00157                     && hapd->iface->num_sta_no_short_preamble == 0)
00158                         set_beacon++;
00159         }
00160 
00161         if (sta->no_ht_gf_set) {
00162                 sta->no_ht_gf_set = 0;
00163                 hapd->iface->num_sta_ht_no_gf--;
00164         }
00165 
00166         if (sta->no_ht_set) {
00167                 sta->no_ht_set = 0;
00168                 hapd->iface->num_sta_no_ht--;
00169         }
00170 
00171         if (sta->ht_20mhz_set) {
00172                 sta->ht_20mhz_set = 0;
00173                 hapd->iface->num_sta_ht_20mhz--;
00174         }
00175 
00176 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
00177         if (hostapd_ht_operation_update(hapd->iface) > 0)
00178                 set_beacon++;
00179 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
00180 
00181         if (set_beacon)
00182                 ieee802_11_set_beacons(hapd->iface);
00183 
00184         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
00185         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
00186 
00187         ieee802_1x_free_station(sta);
00188         wpa_auth_sta_deinit(sta->wpa_sm);
00189         rsn_preauth_free_station(hapd, sta);
00190 #ifndef CONFIG_NO_RADIUS
00191         radius_client_flush_auth(hapd->radius, sta->addr);
00192 #endif /* CONFIG_NO_RADIUS */
00193 
00194         os_free(sta->last_assoc_req);
00195         os_free(sta->challenge);
00196 
00197 #ifdef CONFIG_IEEE80211W
00198         os_free(sta->sa_query_trans_id);
00199         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
00200 #endif /* CONFIG_IEEE80211W */
00201 
00202         wpabuf_free(sta->wps_ie);
00203 
00204         os_free(sta->ht_capabilities);
00205 
00206         os_free(sta);
00207 }
00208 
00209 
00210 void hostapd_free_stas(struct hostapd_data *hapd)
00211 {
00212         struct sta_info *sta, *prev;
00213 
00214         sta = hapd->sta_list;
00215 
00216         while (sta) {
00217                 prev = sta;
00218                 if (sta->flags & WLAN_STA_AUTH) {
00219                         mlme_deauthenticate_indication(
00220                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
00221                 }
00222                 sta = sta->next;
00223                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
00224                            MAC2STR(prev->addr));
00225                 ap_free_sta(hapd, prev);
00226         }
00227 }
00228 
00229 
00238 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
00239 {
00240         struct hostapd_data *hapd = eloop_ctx;
00241         struct sta_info *sta = timeout_ctx;
00242         unsigned long next_time = 0;
00243 
00244         if (sta->timeout_next == STA_REMOVE) {
00245                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00246                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
00247                                "local deauth request");
00248                 ap_free_sta(hapd, sta);
00249                 return;
00250         }
00251 
00252         if ((sta->flags & WLAN_STA_ASSOC) &&
00253             (sta->timeout_next == STA_NULLFUNC ||
00254              sta->timeout_next == STA_DISASSOC)) {
00255                 int inactive_sec;
00256                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
00257                            MAC2STR(sta->addr));
00258                 inactive_sec = hapd->drv.get_inact_sec(hapd, sta->addr);
00259                 if (inactive_sec == -1) {
00260                         wpa_printf(MSG_DEBUG, "Could not get station info "
00261                                    "from kernel driver for " MACSTR ".",
00262                                    MAC2STR(sta->addr));
00263                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
00264                            sta->flags & WLAN_STA_ASSOC) {
00265                         /* station activity detected; reset timeout state */
00266                         wpa_printf(MSG_DEBUG, "  Station has been active");
00267                         sta->timeout_next = STA_NULLFUNC;
00268                         next_time = hapd->conf->ap_max_inactivity -
00269                                 inactive_sec;
00270                 }
00271         }
00272 
00273         if ((sta->flags & WLAN_STA_ASSOC) &&
00274             sta->timeout_next == STA_DISASSOC &&
00275             !(sta->flags & WLAN_STA_PENDING_POLL)) {
00276                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
00277                 /* data nullfunc frame poll did not produce TX errors; assume
00278                  * station ACKed it */
00279                 sta->timeout_next = STA_NULLFUNC;
00280                 next_time = hapd->conf->ap_max_inactivity;
00281         }
00282 
00283         if (next_time) {
00284                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
00285                                        sta);
00286                 return;
00287         }
00288 
00289         if (sta->timeout_next == STA_NULLFUNC &&
00290             (sta->flags & WLAN_STA_ASSOC)) {
00291 #ifndef CONFIG_NATIVE_WINDOWS
00292                 /* send data frame to poll STA and check whether this frame
00293                  * is ACKed */
00294                 struct ieee80211_hdr hdr;
00295 
00296                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
00297                 sta->flags |= WLAN_STA_PENDING_POLL;
00298 
00299                 os_memset(&hdr, 0, sizeof(hdr));
00300                 if (hapd->driver &&
00301                     os_strcmp(hapd->driver->name, "hostap") == 0) {
00302                         /*
00303                          * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
00304                          * but it is apparently not retried so TX Exc events
00305                          * are not received for it.
00306                          */
00307                         hdr.frame_control =
00308                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
00309                                              WLAN_FC_STYPE_DATA);
00310                 } else {
00311                         hdr.frame_control =
00312                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
00313                                              WLAN_FC_STYPE_NULLFUNC);
00314                 }
00315 
00316                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
00317                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
00318                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
00319                           ETH_ALEN);
00320                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
00321 
00322                 if (hapd->drv.send_mgmt_frame(hapd, &hdr, sizeof(hdr)) < 0)
00323                         perror("ap_handle_timer: send");
00324 #endif /* CONFIG_NATIVE_WINDOWS */
00325         } else if (sta->timeout_next != STA_REMOVE) {
00326                 int deauth = sta->timeout_next == STA_DEAUTH;
00327 
00328                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
00329                            deauth ? "deauthentication" : "disassociation",
00330                            MAC2STR(sta->addr));
00331 
00332                 if (deauth) {
00333                         hapd->drv.sta_deauth(hapd, sta->addr,
00334                                              WLAN_REASON_PREV_AUTH_NOT_VALID);
00335                 } else {
00336                         hapd->drv.sta_disassoc(
00337                                 hapd, sta->addr,
00338                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
00339                 }
00340         }
00341 
00342         switch (sta->timeout_next) {
00343         case STA_NULLFUNC:
00344                 sta->timeout_next = STA_DISASSOC;
00345                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
00346                                        hapd, sta);
00347                 break;
00348         case STA_DISASSOC:
00349                 sta->flags &= ~WLAN_STA_ASSOC;
00350                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
00351                 if (!sta->acct_terminate_cause)
00352                         sta->acct_terminate_cause =
00353                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
00354                 accounting_sta_stop(hapd, sta);
00355                 ieee802_1x_free_station(sta);
00356                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00357                                HOSTAPD_LEVEL_INFO, "disassociated due to "
00358                                "inactivity");
00359                 sta->timeout_next = STA_DEAUTH;
00360                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
00361                                        hapd, sta);
00362                 mlme_disassociate_indication(
00363                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
00364                 break;
00365         case STA_DEAUTH:
00366         case STA_REMOVE:
00367                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00368                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
00369                                "inactivity");
00370                 if (!sta->acct_terminate_cause)
00371                         sta->acct_terminate_cause =
00372                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
00373                 mlme_deauthenticate_indication(
00374                         hapd, sta,
00375                         WLAN_REASON_PREV_AUTH_NOT_VALID);
00376                 ap_free_sta(hapd, sta);
00377                 break;
00378         }
00379 }
00380 
00381 
00382 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
00383 {
00384         struct hostapd_data *hapd = eloop_ctx;
00385         struct sta_info *sta = timeout_ctx;
00386         u8 addr[ETH_ALEN];
00387 
00388         if (!(sta->flags & WLAN_STA_AUTH))
00389                 return;
00390 
00391         mlme_deauthenticate_indication(hapd, sta,
00392                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
00393         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00394                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
00395                        "session timeout");
00396         sta->acct_terminate_cause =
00397                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
00398         os_memcpy(addr, sta->addr, ETH_ALEN);
00399         ap_free_sta(hapd, sta);
00400         hapd->drv.sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
00401 }
00402 
00403 
00404 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
00405                             u32 session_timeout)
00406 {
00407         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00408                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
00409                        "seconds", session_timeout);
00410         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
00411         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
00412                                hapd, sta);
00413 }
00414 
00415 
00416 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
00417 {
00418         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
00419 }
00420 
00421 
00422 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
00423 {
00424         struct sta_info *sta;
00425 
00426         sta = ap_get_sta(hapd, addr);
00427         if (sta)
00428                 return sta;
00429 
00430         wpa_printf(MSG_DEBUG, "  New STA");
00431         if (hapd->num_sta >= hapd->conf->max_num_sta) {
00432                 /* FIX: might try to remove some old STAs first? */
00433                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
00434                            hapd->num_sta, hapd->conf->max_num_sta);
00435                 return NULL;
00436         }
00437 
00438         sta = os_zalloc(sizeof(struct sta_info));
00439         if (sta == NULL) {
00440                 wpa_printf(MSG_ERROR, "malloc failed");
00441                 return NULL;
00442         }
00443         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
00444 
00445         /* initialize STA info data */
00446         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
00447                                ap_handle_timer, hapd, sta);
00448         os_memcpy(sta->addr, addr, ETH_ALEN);
00449         sta->next = hapd->sta_list;
00450         hapd->sta_list = sta;
00451         hapd->num_sta++;
00452         ap_sta_hash_add(hapd, sta);
00453         sta->ssid = &hapd->conf->ssid;
00454         ap_sta_remove_in_other_bss(hapd, sta);
00455 
00456         return sta;
00457 }
00458 
00459 
00460 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
00461 {
00462         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
00463 
00464         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
00465                    MAC2STR(sta->addr));
00466         if (hapd->drv.sta_remove(hapd, sta->addr) &&
00467             sta->flags & WLAN_STA_ASSOC) {
00468                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
00469                            " from kernel driver.", MAC2STR(sta->addr));
00470                 return -1;
00471         }
00472         return 0;
00473 }
00474 
00475 
00476 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
00477                                        struct sta_info *sta)
00478 {
00479         struct hostapd_iface *iface = hapd->iface;
00480         size_t i;
00481 
00482         for (i = 0; i < iface->num_bss; i++) {
00483                 struct hostapd_data *bss = iface->bss[i];
00484                 struct sta_info *sta2;
00485                 /* bss should always be set during operation, but it may be
00486                  * NULL during reconfiguration. Assume the STA is not
00487                  * associated to another BSS in that case to avoid NULL pointer
00488                  * dereferences. */
00489                 if (bss == hapd || bss == NULL)
00490                         continue;
00491                 sta2 = ap_get_sta(bss, sta->addr);
00492                 if (!sta2)
00493                         continue;
00494 
00495                 ap_sta_disconnect(bss, sta2, sta2->addr,
00496                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
00497         }
00498 }
00499 
00500 
00501 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
00502                          u16 reason)
00503 {
00504         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
00505                    hapd->conf->iface, MAC2STR(sta->addr));
00506         sta->flags &= ~WLAN_STA_ASSOC;
00507         ap_sta_remove(hapd, sta);
00508         sta->timeout_next = STA_DEAUTH;
00509         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
00510         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
00511                                ap_handle_timer, hapd, sta);
00512         accounting_sta_stop(hapd, sta);
00513         ieee802_1x_free_station(sta);
00514 
00515         mlme_disassociate_indication(hapd, sta, reason);
00516 }
00517 
00518 
00519 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
00520                            u16 reason)
00521 {
00522         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
00523                    hapd->conf->iface, MAC2STR(sta->addr));
00524         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
00525         ap_sta_remove(hapd, sta);
00526         sta->timeout_next = STA_REMOVE;
00527         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
00528         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
00529                                ap_handle_timer, hapd, sta);
00530         accounting_sta_stop(hapd, sta);
00531         ieee802_1x_free_station(sta);
00532 
00533         mlme_deauthenticate_indication(hapd, sta, reason);
00534 }
00535 
00536 
00537 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
00538                      int old_vlanid)
00539 {
00540 #ifndef CONFIG_NO_VLAN
00541         const char *iface;
00542         struct hostapd_vlan *vlan = NULL;
00543         int ret;
00544 
00545         /*
00546          * Do not proceed furthur if the vlan id remains same. We do not want
00547          * duplicate dynamic vlan entries.
00548          */
00549         if (sta->vlan_id == old_vlanid)
00550                 return 0;
00551 
00552         /*
00553          * During 1x reauth, if the vlan id changes, then remove the old id and
00554          * proceed furthur to add the new one.
00555          */
00556         if (old_vlanid > 0)
00557                 vlan_remove_dynamic(hapd, old_vlanid);
00558 
00559         iface = hapd->conf->iface;
00560         if (sta->ssid->vlan[0])
00561                 iface = sta->ssid->vlan;
00562 
00563         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
00564                 sta->vlan_id = 0;
00565         else if (sta->vlan_id > 0) {
00566                 vlan = hapd->conf->vlan;
00567                 while (vlan) {
00568                         if (vlan->vlan_id == sta->vlan_id ||
00569                             vlan->vlan_id == VLAN_ID_WILDCARD) {
00570                                 iface = vlan->ifname;
00571                                 break;
00572                         }
00573                         vlan = vlan->next;
00574                 }
00575         }
00576 
00577         if (sta->vlan_id > 0 && vlan == NULL) {
00578                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00579                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
00580                                "binding station to (vlan_id=%d)",
00581                                sta->vlan_id);
00582                 return -1;
00583         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
00584                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
00585                 if (vlan == NULL) {
00586                         hostapd_logger(hapd, sta->addr,
00587                                        HOSTAPD_MODULE_IEEE80211,
00588                                        HOSTAPD_LEVEL_DEBUG, "could not add "
00589                                        "dynamic VLAN interface for vlan_id=%d",
00590                                        sta->vlan_id);
00591                         return -1;
00592                 }
00593 
00594                 iface = vlan->ifname;
00595                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
00596                         hostapd_logger(hapd, sta->addr,
00597                                        HOSTAPD_MODULE_IEEE80211,
00598                                        HOSTAPD_LEVEL_DEBUG, "could not "
00599                                        "configure encryption for dynamic VLAN "
00600                                        "interface for vlan_id=%d",
00601                                        sta->vlan_id);
00602                 }
00603 
00604                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00605                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
00606                                "interface '%s'", iface);
00607         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
00608                 if (sta->vlan_id > 0) {
00609                         vlan->dynamic_vlan++;
00610                         hostapd_logger(hapd, sta->addr,
00611                                        HOSTAPD_MODULE_IEEE80211,
00612                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
00613                                        "dynamic VLAN interface '%s'", iface);
00614                 }
00615 
00616                 /*
00617                  * Update encryption configuration for statically generated
00618                  * VLAN interface. This is only used for static WEP
00619                  * configuration for the case where hostapd did not yet know
00620                  * which keys are to be used when the interface was added.
00621                  */
00622                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
00623                         hostapd_logger(hapd, sta->addr,
00624                                        HOSTAPD_MODULE_IEEE80211,
00625                                        HOSTAPD_LEVEL_DEBUG, "could not "
00626                                        "configure encryption for VLAN "
00627                                        "interface for vlan_id=%d",
00628                                        sta->vlan_id);
00629                 }
00630         }
00631 
00632         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00633                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
00634                        "'%s'", iface);
00635 
00636         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
00637                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
00638 
00639         ret = hapd->drv.set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
00640         if (ret < 0) {
00641                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00642                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
00643                                "entry to vlan_id=%d", sta->vlan_id);
00644         }
00645         return ret;
00646 #else /* CONFIG_NO_VLAN */
00647         return 0;
00648 #endif /* CONFIG_NO_VLAN */
00649 }
00650 
00651 
00652 #ifdef CONFIG_IEEE80211W
00653 
00654 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
00655 {
00656         u32 tu;
00657         struct os_time now, passed;
00658         os_get_time(&now);
00659         os_time_sub(&now, &sta->sa_query_start, &passed);
00660         tu = (passed.sec * 1000000 + passed.usec) / 1024;
00661         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
00662                 hostapd_logger(hapd, sta->addr,
00663                                HOSTAPD_MODULE_IEEE80211,
00664                                HOSTAPD_LEVEL_DEBUG,
00665                                "association SA Query timed out");
00666                 sta->sa_query_timed_out = 1;
00667                 os_free(sta->sa_query_trans_id);
00668                 sta->sa_query_trans_id = NULL;
00669                 sta->sa_query_count = 0;
00670                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
00671                 return 1;
00672         }
00673 
00674         return 0;
00675 }
00676 
00677 
00678 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
00679 {
00680         struct hostapd_data *hapd = eloop_ctx;
00681         struct sta_info *sta = timeout_ctx;
00682         unsigned int timeout, sec, usec;
00683         u8 *trans_id, *nbuf;
00684 
00685         if (sta->sa_query_count > 0 &&
00686             ap_check_sa_query_timeout(hapd, sta))
00687                 return;
00688 
00689         nbuf = os_realloc(sta->sa_query_trans_id,
00690                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
00691         if (nbuf == NULL)
00692                 return;
00693         if (sta->sa_query_count == 0) {
00694                 /* Starting a new SA Query procedure */
00695                 os_get_time(&sta->sa_query_start);
00696         }
00697         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
00698         sta->sa_query_trans_id = nbuf;
00699         sta->sa_query_count++;
00700 
00701         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
00702 
00703         timeout = hapd->conf->assoc_sa_query_retry_timeout;
00704         sec = ((timeout / 1000) * 1024) / 1000;
00705         usec = (timeout % 1000) * 1024;
00706         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
00707 
00708         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00709                        HOSTAPD_LEVEL_DEBUG,
00710                        "association SA Query attempt %d", sta->sa_query_count);
00711 
00712 #ifdef NEED_AP_MLME
00713         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
00714 #endif /* NEED_AP_MLME */
00715 }
00716 
00717 
00718 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
00719 {
00720         ap_sa_query_timer(hapd, sta);
00721 }
00722 
00723 
00724 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
00725 {
00726         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
00727         os_free(sta->sa_query_trans_id);
00728         sta->sa_query_trans_id = NULL;
00729         sta->sa_query_count = 0;
00730 }
00731 
00732 #endif /* CONFIG_IEEE80211W */
00733 
00734 
00735 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
00736                        const u8 *addr, u16 reason)
00737 {
00738 
00739         if (sta == NULL && addr)
00740                 sta = ap_get_sta(hapd, addr);
00741 
00742         if (addr)
00743                 hapd->drv.sta_deauth(hapd, addr, reason);
00744 
00745         if (sta == NULL)
00746                 return;
00747         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_AUTHORIZED);
00748         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
00749         eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
00750         sta->timeout_next = STA_REMOVE;
00751 }