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 "p2p_hostapd.h"
  35 #include "ap_drv_ops.h"
  36 #include "sta_info.h"
  37
  38 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
  39                                        struct sta_info *sta);
  40 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  41 #ifdef CONFIG_IEEE80211W
  42 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  43 #endif /* CONFIG_IEEE80211W */
  44
  45 int ap_for_each_sta(struct hostapd_data *hapd,
  46                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  47                               void *ctx),
  48                     void *ctx)
  49 {
  50         struct sta_info *sta;
  51
  52         for (sta = hapd->sta_list; sta; sta = sta->next) {
  53                 if (cb(hapd, sta, ctx))
  54                         return 1;
  55         }
  56
  57         return 0;
  58 }
  59
  60
  61 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  62 {
  63         struct sta_info *s;
  64
  65         s = hapd->sta_hash[STA_HASH(sta)];
  66         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  67                 s = s->hnext;
  68         return s;
  69 }
  70
  71
  72 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  73 {
  74         struct sta_info *tmp;
  75
  76         if (hapd->sta_list == sta) {
  77                 hapd->sta_list = sta->next;
  78                 return;
  79         }
  80
  81         tmp = hapd->sta_list;
  82         while (tmp != NULL && tmp->next != sta)
  83                 tmp = tmp->next;
  84         if (tmp == NULL) {
  85                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
  86                            "list.", MAC2STR(sta->addr));
  87         } else
  88                 tmp->next = sta->next;
  89 }
  90
  91
  92 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
  93 {
  94         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
  95         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
  96 }
  97
  98
  99 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
 100 {
 101         struct sta_info *s;
 102
 103         s = hapd->sta_hash[STA_HASH(sta->addr)];
 104         if (s == NULL) return;
 105         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 106                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 107                 return;
 108         }
 109
 110         while (s->hnext != NULL &&
 111                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 112                 s = s->hnext;
 113         if (s->hnext != NULL)
 114                 s->hnext = s->hnext->hnext;
 115         else
 116                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 117                            " from hash table", MAC2STR(sta->addr));
 118 }
 119
 120
 121 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 122 {
 123         int set_beacon = 0;
 124
 125         accounting_sta_stop(hapd, sta);
 126
 127         /* just in case */
 128         ap_sta_set_authorized(hapd, sta, 0);
 129
 130         if (sta->flags & WLAN_STA_WDS)
 131                 hostapd_set_wds_sta(hapd, sta->addr, sta->aid, 0);
 132
 133         if (!(sta->flags & WLAN_STA_PREAUTH))
 134                 hostapd_drv_sta_remove(hapd, sta->addr);
 135
 136         ap_sta_hash_del(hapd, sta);
 137         ap_sta_list_del(hapd, sta);
 138
 139         if (sta->aid > 0)
 140                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 141                         ~BIT((sta->aid - 1) % 32);
 142
 143         hapd->num_sta--;
 144         if (sta->nonerp_set) {
 145                 sta->nonerp_set = 0;
 146                 hapd->iface->num_sta_non_erp--;
 147                 if (hapd->iface->num_sta_non_erp == 0)
 148                         set_beacon++;
 149         }
 150
 151         if (sta->no_short_slot_time_set) {
 152                 sta->no_short_slot_time_set = 0;
 153                 hapd->iface->num_sta_no_short_slot_time--;
 154                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 155                     && hapd->iface->num_sta_no_short_slot_time == 0)
 156                         set_beacon++;
 157         }
 158
 159         if (sta->no_short_preamble_set) {
 160                 sta->no_short_preamble_set = 0;
 161                 hapd->iface->num_sta_no_short_preamble--;
 162                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 163                     && hapd->iface->num_sta_no_short_preamble == 0)
 164                         set_beacon++;
 165         }
 166
 167         if (sta->no_ht_gf_set) {
 168                 sta->no_ht_gf_set = 0;
 169                 hapd->iface->num_sta_ht_no_gf--;
 170         }
 171
 172         if (sta->no_ht_set) {
 173                 sta->no_ht_set = 0;
 174                 hapd->iface->num_sta_no_ht--;
 175         }
 176
 177         if (sta->ht_20mhz_set) {
 178                 sta->ht_20mhz_set = 0;
 179                 hapd->iface->num_sta_ht_20mhz--;
 180         }
 181
 182 #ifdef CONFIG_P2P
 183         if (sta->no_p2p_set) {
 184                 sta->no_p2p_set = 0;
 185                 hapd->num_sta_no_p2p--;
 186                 if (hapd->num_sta_no_p2p == 0)
 187                         hostapd_p2p_non_p2p_sta_disconnected(hapd);
 188         }
 189 #endif /* CONFIG_P2P */
 190
 191 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 192         if (hostapd_ht_operation_update(hapd->iface) > 0)
 193                 set_beacon++;
 194 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 195
 196         if (set_beacon)
 197                 ieee802_11_set_beacons(hapd->iface);
 198
 199         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 200         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 201
 202         ieee802_1x_free_station(sta);
 203         wpa_auth_sta_deinit(sta->wpa_sm);
 204         rsn_preauth_free_station(hapd, sta);
 205 #ifndef CONFIG_NO_RADIUS
 206         radius_client_flush_auth(hapd->radius, sta->addr);
 207 #endif /* CONFIG_NO_RADIUS */
 208
 209         os_free(sta->last_assoc_req);
 210         os_free(sta->challenge);
 211
 212 #ifdef CONFIG_IEEE80211W
 213         os_free(sta->sa_query_trans_id);
 214         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 215 #endif /* CONFIG_IEEE80211W */
 216
 217 #ifdef CONFIG_P2P
 218         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 219 #endif /* CONFIG_P2P */
 220
 221         wpabuf_free(sta->wps_ie);
 222         wpabuf_free(sta->p2p_ie);
 223
 224         os_free(sta->ht_capabilities);
 225
 226         os_free(sta);
 227 }
 228
 229
 230 void hostapd_free_stas(struct hostapd_data *hapd)
 231 {
 232         struct sta_info *sta, *prev;
 233
 234         sta = hapd->sta_list;
 235
 236         while (sta) {
 237                 prev = sta;
 238                 if (sta->flags & WLAN_STA_AUTH) {
 239                         mlme_deauthenticate_indication(
 240                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 241                 }
 242                 sta = sta->next;
 243                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 244                            MAC2STR(prev->addr));
 245                 ap_free_sta(hapd, prev);
 246         }
 247 }
 248
 249
 250 /**
 251  * ap_handle_timer - Per STA timer handler
 252  * @eloop_ctx: struct hostapd_data *
 253  * @timeout_ctx: struct sta_info *
 254  *
 255  * This function is called to check station activity and to remove inactive
 256  * stations.
 257  */
 258 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 259 {
 260         struct hostapd_data *hapd = eloop_ctx;
 261         struct sta_info *sta = timeout_ctx;
 262         unsigned long next_time = 0;
 263
 264         if (sta->timeout_next == STA_REMOVE) {
 265                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 266                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 267                                "local deauth request");
 268                 ap_free_sta(hapd, sta);
 269                 return;
 270         }
 271
 272         if ((sta->flags & WLAN_STA_ASSOC) &&
 273             (sta->timeout_next == STA_NULLFUNC ||
 274              sta->timeout_next == STA_DISASSOC)) {
 275                 int inactive_sec;
 276                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 277                 if (inactive_sec == -1) {
 278                         wpa_msg(hapd, MSG_DEBUG, "Check inactivity: Could not "
 279                                 "get station info rom kernel driver for "
 280                                 MACSTR, MAC2STR(sta->addr));
 281                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 282                            sta->flags & WLAN_STA_ASSOC) {
 283                         /* station activity detected; reset timeout state */
 284                         wpa_msg(hapd, MSG_DEBUG, "Station " MACSTR " has been "
 285                                 "active %is ago",
 286                                 MAC2STR(sta->addr), inactive_sec);
 287                         sta->timeout_next = STA_NULLFUNC;
 288                         next_time = hapd->conf->ap_max_inactivity -
 289                                 inactive_sec;
 290                 } else {
 291                         wpa_msg(hapd, MSG_DEBUG, "Station " MACSTR " has been "
 292                                 "inactive too long: %d sec, max allowed: %d",
 293                                 MAC2STR(sta->addr), inactive_sec,
 294                                 hapd->conf->ap_max_inactivity);
 295                 }
 296         }
 297
 298         if ((sta->flags & WLAN_STA_ASSOC) &&
 299             sta->timeout_next == STA_DISASSOC &&
 300             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 301                 wpa_msg(hapd, MSG_DEBUG, "Station " MACSTR " has ACKed data "
 302                         "poll", MAC2STR(sta->addr));
 303                 /* data nullfunc frame poll did not produce TX errors; assume
 304                  * station ACKed it */
 305                 sta->timeout_next = STA_NULLFUNC;
 306                 next_time = hapd->conf->ap_max_inactivity;
 307         }
 308
 309         if (next_time) {
 310                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 311                                        sta);
 312                 return;
 313         }
 314
 315         if (sta->timeout_next == STA_NULLFUNC &&
 316             (sta->flags & WLAN_STA_ASSOC)) {
 317 #ifndef CONFIG_NATIVE_WINDOWS
 318                 /* send data frame to poll STA and check whether this frame
 319                  * is ACKed */
 320                 struct ieee80211_hdr hdr;
 321
 322                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 323                 sta->flags |= WLAN_STA_PENDING_POLL;
 324
 325                 os_memset(&hdr, 0, sizeof(hdr));
 326                 if (hapd->driver &&
 327                     os_strcmp(hapd->driver->name, "hostap") == 0) {
 328                         /*
 329                          * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
 330                          * but it is apparently not retried so TX Exc events
 331                          * are not received for it.
 332                          */
 333                         hdr.frame_control =
 334                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 335                                              WLAN_FC_STYPE_DATA);
 336                 } else {
 337                         hdr.frame_control =
 338                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 339                                              WLAN_FC_STYPE_NULLFUNC);
 340                 }
 341
 342                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 343                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 344                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 345                           ETH_ALEN);
 346                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 347
 348                 if (hostapd_drv_send_mlme(hapd, &hdr, sizeof(hdr)) < 0)
 349                         perror("ap_handle_timer: send");
 350 #endif /* CONFIG_NATIVE_WINDOWS */
 351         } else if (sta->timeout_next != STA_REMOVE) {
 352                 int deauth = sta->timeout_next == STA_DEAUTH;
 353
 354                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 355                            deauth ? "deauthentication" : "disassociation",
 356                            MAC2STR(sta->addr));
 357
 358                 if (deauth) {
 359                         hostapd_drv_sta_deauth(
 360                                 hapd, sta->addr,
 361                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 362                 } else {
 363                         hostapd_drv_sta_disassoc(
 364                                 hapd, sta->addr,
 365                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 366                 }
 367         }
 368
 369         switch (sta->timeout_next) {
 370         case STA_NULLFUNC:
 371                 sta->timeout_next = STA_DISASSOC;
 372                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 373                                        hapd, sta);
 374                 break;
 375         case STA_DISASSOC:
 376                 sta->flags &= ~WLAN_STA_ASSOC;
 377                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 378                 if (!sta->acct_terminate_cause)
 379                         sta->acct_terminate_cause =
 380                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 381                 accounting_sta_stop(hapd, sta);
 382                 ieee802_1x_free_station(sta);
 383                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 384                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 385                                "inactivity");
 386                 sta->timeout_next = STA_DEAUTH;
 387                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 388                                        hapd, sta);
 389                 mlme_disassociate_indication(
 390                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 391                 break;
 392         case STA_DEAUTH:
 393         case STA_REMOVE:
 394                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 395                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 396                                "inactivity");
 397                 if (!sta->acct_terminate_cause)
 398                         sta->acct_terminate_cause =
 399                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 400                 mlme_deauthenticate_indication(
 401                         hapd, sta,
 402                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 403                 ap_free_sta(hapd, sta);
 404                 break;
 405         }
 406 }
 407
 408
 409 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 410 {
 411         struct hostapd_data *hapd = eloop_ctx;
 412         struct sta_info *sta = timeout_ctx;
 413         u8 addr[ETH_ALEN];
 414
 415         if (!(sta->flags & WLAN_STA_AUTH))
 416                 return;
 417
 418         mlme_deauthenticate_indication(hapd, sta,
 419                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 420         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 421                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 422                        "session timeout");
 423         sta->acct_terminate_cause =
 424                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 425         os_memcpy(addr, sta->addr, ETH_ALEN);
 426         ap_free_sta(hapd, sta);
 427         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 428 }
 429
 430
 431 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 432                             u32 session_timeout)
 433 {
 434         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 435                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 436                        "seconds", session_timeout);
 437         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 438         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 439                                hapd, sta);
 440 }
 441
 442
 443 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 444 {
 445         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 446 }
 447
 448
 449 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 450 {
 451         struct sta_info *sta;
 452
 453         sta = ap_get_sta(hapd, addr);
 454         if (sta)
 455                 return sta;
 456
 457         wpa_printf(MSG_DEBUG, "  New STA");
 458         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 459                 /* FIX: might try to remove some old STAs first? */
 460                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 461                            hapd->num_sta, hapd->conf->max_num_sta);
 462                 return NULL;
 463         }
 464
 465         sta = os_zalloc(sizeof(struct sta_info));
 466         if (sta == NULL) {
 467                 wpa_printf(MSG_ERROR, "malloc failed");
 468                 return NULL;
 469         }
 470         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 471
 472         /* initialize STA info data */
 473         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 474                                ap_handle_timer, hapd, sta);
 475         os_memcpy(sta->addr, addr, ETH_ALEN);
 476         sta->next = hapd->sta_list;
 477         hapd->sta_list = sta;
 478         hapd->num_sta++;
 479         ap_sta_hash_add(hapd, sta);
 480         sta->ssid = &hapd->conf->ssid;
 481         ap_sta_remove_in_other_bss(hapd, sta);
 482
 483         return sta;
 484 }
 485
 486
 487 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 488 {
 489         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 490
 491         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 492                    MAC2STR(sta->addr));
 493         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 494             sta->flags & WLAN_STA_ASSOC) {
 495                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 496                            " from kernel driver.", MAC2STR(sta->addr));
 497                 return -1;
 498         }
 499         return 0;
 500 }
 501
 502
 503 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 504                                        struct sta_info *sta)
 505 {
 506         struct hostapd_iface *iface = hapd->iface;
 507         size_t i;
 508
 509         for (i = 0; i < iface->num_bss; i++) {
 510                 struct hostapd_data *bss = iface->bss[i];
 511                 struct sta_info *sta2;
 512                 /* bss should always be set during operation, but it may be
 513                  * NULL during reconfiguration. Assume the STA is not
 514                  * associated to another BSS in that case to avoid NULL pointer
 515                  * dereferences. */
 516                 if (bss == hapd || bss == NULL)
 517                         continue;
 518                 sta2 = ap_get_sta(bss, sta->addr);
 519                 if (!sta2)
 520                         continue;
 521
 522                 ap_sta_disconnect(bss, sta2, sta2->addr,
 523                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 524         }
 525 }
 526
 527
 528 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 529                          u16 reason)
 530 {
 531         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 532                    hapd->conf->iface, MAC2STR(sta->addr));
 533         sta->flags &= ~WLAN_STA_ASSOC;
 534         ap_sta_remove(hapd, sta);
 535         sta->timeout_next = STA_DEAUTH;
 536         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 537         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 538                                ap_handle_timer, hapd, sta);
 539         accounting_sta_stop(hapd, sta);
 540         ieee802_1x_free_station(sta);
 541
 542         mlme_disassociate_indication(hapd, sta, reason);
 543 }
 544
 545
 546 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 547                            u16 reason)
 548 {
 549         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 550                    hapd->conf->iface, MAC2STR(sta->addr));
 551         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 552         ap_sta_remove(hapd, sta);
 553         sta->timeout_next = STA_REMOVE;
 554         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 555         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 556                                ap_handle_timer, hapd, sta);
 557         accounting_sta_stop(hapd, sta);
 558         ieee802_1x_free_station(sta);
 559
 560         mlme_deauthenticate_indication(hapd, sta, reason);
 561 }
 562
 563
 564 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 565                      int old_vlanid)
 566 {
 567 #ifndef CONFIG_NO_VLAN
 568         const char *iface;
 569         struct hostapd_vlan *vlan = NULL;
 570         int ret;
 571
 572         /*
 573          * Do not proceed furthur if the vlan id remains same. We do not want
 574          * duplicate dynamic vlan entries.
 575          */
 576         if (sta->vlan_id == old_vlanid)
 577                 return 0;
 578
 579         /*
 580          * During 1x reauth, if the vlan id changes, then remove the old id and
 581          * proceed furthur to add the new one.
 582          */
 583         if (old_vlanid > 0)
 584                 vlan_remove_dynamic(hapd, old_vlanid);
 585
 586         iface = hapd->conf->iface;
 587         if (sta->ssid->vlan[0])
 588                 iface = sta->ssid->vlan;
 589
 590         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 591                 sta->vlan_id = 0;
 592         else if (sta->vlan_id > 0) {
 593                 vlan = hapd->conf->vlan;
 594                 while (vlan) {
 595                         if (vlan->vlan_id == sta->vlan_id ||
 596                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 597                                 iface = vlan->ifname;
 598                                 break;
 599                         }
 600                         vlan = vlan->next;
 601                 }
 602         }
 603
 604         if (sta->vlan_id > 0 && vlan == NULL) {
 605                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 606                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 607                                "binding station to (vlan_id=%d)",
 608                                sta->vlan_id);
 609                 return -1;
 610         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 611                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 612                 if (vlan == NULL) {
 613                         hostapd_logger(hapd, sta->addr,
 614                                        HOSTAPD_MODULE_IEEE80211,
 615                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 616                                        "dynamic VLAN interface for vlan_id=%d",
 617                                        sta->vlan_id);
 618                         return -1;
 619                 }
 620
 621                 iface = vlan->ifname;
 622                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 623                         hostapd_logger(hapd, sta->addr,
 624                                        HOSTAPD_MODULE_IEEE80211,
 625                                        HOSTAPD_LEVEL_DEBUG, "could not "
 626                                        "configure encryption for dynamic VLAN "
 627                                        "interface for vlan_id=%d",
 628                                        sta->vlan_id);
 629                 }
 630
 631                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 632                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 633                                "interface '%s'", iface);
 634         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 635                 if (sta->vlan_id > 0) {
 636                         vlan->dynamic_vlan++;
 637                         hostapd_logger(hapd, sta->addr,
 638                                        HOSTAPD_MODULE_IEEE80211,
 639                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 640                                        "dynamic VLAN interface '%s'", iface);
 641                 }
 642
 643                 /*
 644                  * Update encryption configuration for statically generated
 645                  * VLAN interface. This is only used for static WEP
 646                  * configuration for the case where hostapd did not yet know
 647                  * which keys are to be used when the interface was added.
 648                  */
 649                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 650                         hostapd_logger(hapd, sta->addr,
 651                                        HOSTAPD_MODULE_IEEE80211,
 652                                        HOSTAPD_LEVEL_DEBUG, "could not "
 653                                        "configure encryption for VLAN "
 654                                        "interface for vlan_id=%d",
 655                                        sta->vlan_id);
 656                 }
 657         }
 658
 659         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 660                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 661                        "'%s'", iface);
 662
 663         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 664                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 665
 666         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 667         if (ret < 0) {
 668                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 669                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 670                                "entry to vlan_id=%d", sta->vlan_id);
 671         }
 672         return ret;
 673 #else /* CONFIG_NO_VLAN */
 674         return 0;
 675 #endif /* CONFIG_NO_VLAN */
 676 }
 677
 678
 679 #ifdef CONFIG_IEEE80211W
 680
 681 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 682 {
 683         u32 tu;
 684         struct os_time now, passed;
 685         os_get_time(&now);
 686         os_time_sub(&now, &sta->sa_query_start, &passed);
 687         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 688         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 689                 hostapd_logger(hapd, sta->addr,
 690                                HOSTAPD_MODULE_IEEE80211,
 691                                HOSTAPD_LEVEL_DEBUG,
 692                                "association SA Query timed out");
 693                 sta->sa_query_timed_out = 1;
 694                 os_free(sta->sa_query_trans_id);
 695                 sta->sa_query_trans_id = NULL;
 696                 sta->sa_query_count = 0;
 697                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 698                 return 1;
 699         }
 700
 701         return 0;
 702 }
 703
 704
 705 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 706 {
 707         struct hostapd_data *hapd = eloop_ctx;
 708         struct sta_info *sta = timeout_ctx;
 709         unsigned int timeout, sec, usec;
 710         u8 *trans_id, *nbuf;
 711
 712         if (sta->sa_query_count > 0 &&
 713             ap_check_sa_query_timeout(hapd, sta))
 714                 return;
 715
 716         nbuf = os_realloc(sta->sa_query_trans_id,
 717                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 718         if (nbuf == NULL)
 719                 return;
 720         if (sta->sa_query_count == 0) {
 721                 /* Starting a new SA Query procedure */
 722                 os_get_time(&sta->sa_query_start);
 723         }
 724         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 725         sta->sa_query_trans_id = nbuf;
 726         sta->sa_query_count++;
 727
 728         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 729
 730         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 731         sec = ((timeout / 1000) * 1024) / 1000;
 732         usec = (timeout % 1000) * 1024;
 733         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 734
 735         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 736                        HOSTAPD_LEVEL_DEBUG,
 737                        "association SA Query attempt %d", sta->sa_query_count);
 738
 739 #ifdef NEED_AP_MLME
 740         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 741 #endif /* NEED_AP_MLME */
 742 }
 743
 744
 745 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 746 {
 747         ap_sa_query_timer(hapd, sta);
 748 }
 749
 750
 751 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 752 {
 753         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 754         os_free(sta->sa_query_trans_id);
 755         sta->sa_query_trans_id = NULL;
 756         sta->sa_query_count = 0;
 757 }
 758
 759 #endif /* CONFIG_IEEE80211W */
 760
 761
 762 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 763                            int authorized)
 764 {
 765         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 766                 return;
 767
 768         if (authorized)
 769                 sta->flags |= WLAN_STA_AUTHORIZED;
 770         else
 771                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 772
 773         if (hapd->sta_authorized_cb)
 774                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 775                                         sta->addr, authorized);
 776 }
 777
 778
 779 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 780                        const u8 *addr, u16 reason)
 781 {
 782
 783         if (sta == NULL && addr)
 784                 sta = ap_get_sta(hapd, addr);
 785
 786         if (addr)
 787                 hostapd_drv_sta_deauth(hapd, addr, reason);
 788
 789         if (sta == NULL)
 790                 return;
 791         ap_sta_set_authorized(hapd, sta, 0);
 792         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 793         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 794         eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
 795         sta->timeout_next = STA_REMOVE;
 796 }