hostapd/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2007-2008, Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #include "includes.h"
  17
  18 #include "common.h"
  19 #include "hostapd.h"
  20 #include "sta_flags.h"
  21 #include "sta_info.h"
  22 #include "eloop.h"
  23 #include "accounting.h"
  24 #include "ieee802_1x.h"
  25 #include "ieee802_11.h"
  26 #include "radius/radius.h"
  27 #include "wpa.h"
  28 #include "preauth.h"
  29 #include "radius/radius_client.h"
  30 #include "driver_i.h"
  31 #include "beacon.h"
  32 #include "hw_features.h"
  33 #include "mlme.h"
  34 #include "vlan_init.h"
  35
  36 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
  37                                struct sta_info *sta, u32 flags);
  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 (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC) &&
 126             !(sta->flags & WLAN_STA_PREAUTH))
 127                 hostapd_sta_remove(hapd, sta->addr);
 128
 129         ap_sta_hash_del(hapd, sta);
 130         ap_sta_list_del(hapd, sta);
 131
 132         if (sta->aid > 0)
 133                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 134                         ~BIT((sta->aid - 1) % 32);
 135
 136         hapd->num_sta--;
 137         if (sta->nonerp_set) {
 138                 sta->nonerp_set = 0;
 139                 hapd->iface->num_sta_non_erp--;
 140                 if (hapd->iface->num_sta_non_erp == 0)
 141                         set_beacon++;
 142         }
 143
 144         if (sta->no_short_slot_time_set) {
 145                 sta->no_short_slot_time_set = 0;
 146                 hapd->iface->num_sta_no_short_slot_time--;
 147                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 148                     && hapd->iface->num_sta_no_short_slot_time == 0)
 149                         set_beacon++;
 150         }
 151
 152         if (sta->no_short_preamble_set) {
 153                 sta->no_short_preamble_set = 0;
 154                 hapd->iface->num_sta_no_short_preamble--;
 155                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 156                     && hapd->iface->num_sta_no_short_preamble == 0)
 157                         set_beacon++;
 158         }
 159
 160 #ifdef CONFIG_IEEE80211N
 161         if (sta->no_ht_gf_set) {
 162                 sta->no_ht_gf_set = 0;
 163                 hapd->iface->num_sta_ht_no_gf--;
 164         }
 165
 166         if (sta->no_ht_set) {
 167                 sta->no_ht_set = 0;
 168                 hapd->iface->num_sta_no_ht--;
 169         }
 170
 171         if (sta->ht_20mhz_set) {
 172                 sta->ht_20mhz_set = 0;
 173                 hapd->iface->num_sta_ht_20mhz--;
 174         }
 175
 176 #ifdef NEED_AP_MLME
 177         if (hostapd_ht_operation_update(hapd->iface) > 0)
 178                 set_beacon++;
 179 #endif /* NEED_AP_MLME */
 180 #endif /* 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         wpabuf_free(sta->wps_ie);
 204
 205         os_free(sta->ht_capabilities);
 206
 207         os_free(sta);
 208 }
 209
 210
 211 void hostapd_free_stas(struct hostapd_data *hapd)
 212 {
 213         struct sta_info *sta, *prev;
 214
 215         sta = hapd->sta_list;
 216
 217         while (sta) {
 218                 prev = sta;
 219                 if (sta->flags & WLAN_STA_AUTH) {
 220                         mlme_deauthenticate_indication(
 221                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 222                 }
 223                 sta = sta->next;
 224                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 225                            MAC2STR(prev->addr));
 226                 ap_free_sta(hapd, prev);
 227         }
 228 }
 229
 230
 231 /**
 232  * ap_handle_timer - Per STA timer handler
 233  * @eloop_ctx: struct hostapd_data *
 234  * @timeout_ctx: struct sta_info *
 235  *
 236  * This function is called to check station activity and to remove inactive
 237  * stations.
 238  */
 239 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 240 {
 241         struct hostapd_data *hapd = eloop_ctx;
 242         struct sta_info *sta = timeout_ctx;
 243         unsigned long next_time = 0;
 244
 245         if (sta->timeout_next == STA_REMOVE) {
 246                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 247                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 248                                "local deauth request");
 249                 ap_free_sta(hapd, sta);
 250                 return;
 251         }
 252
 253         if ((sta->flags & WLAN_STA_ASSOC) &&
 254             (sta->timeout_next == STA_NULLFUNC ||
 255              sta->timeout_next == STA_DISASSOC)) {
 256                 int inactive_sec;
 257                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
 258                            MAC2STR(sta->addr));
 259                 inactive_sec = hostapd_get_inact_sec(hapd, sta->addr);
 260                 if (inactive_sec == -1) {
 261                         wpa_printf(MSG_DEBUG, "Could not get station info "
 262                                    "from kernel driver for " MACSTR ".",
 263                                    MAC2STR(sta->addr));
 264                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 265                            sta->flags & WLAN_STA_ASSOC) {
 266                         /* station activity detected; reset timeout state */
 267                         wpa_printf(MSG_DEBUG, "  Station has been active");
 268                         sta->timeout_next = STA_NULLFUNC;
 269                         next_time = hapd->conf->ap_max_inactivity -
 270                                 inactive_sec;
 271                 }
 272         }
 273
 274         if ((sta->flags & WLAN_STA_ASSOC) &&
 275             sta->timeout_next == STA_DISASSOC &&
 276             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 277                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
 278                 /* data nullfunc frame poll did not produce TX errors; assume
 279                  * station ACKed it */
 280                 sta->timeout_next = STA_NULLFUNC;
 281                 next_time = hapd->conf->ap_max_inactivity;
 282         }
 283
 284         if (next_time) {
 285                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 286                                        sta);
 287                 return;
 288         }
 289
 290         if (sta->timeout_next == STA_NULLFUNC &&
 291             (sta->flags & WLAN_STA_ASSOC)) {
 292                 /* send data frame to poll STA and check whether this frame
 293                  * is ACKed */
 294                 struct ieee80211_hdr hdr;
 295
 296                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 297                 sta->flags |= WLAN_STA_PENDING_POLL;
 298
 299 #ifndef CONFIG_NATIVE_WINDOWS
 300                 os_memset(&hdr, 0, sizeof(hdr));
 301                 if (hapd->driver &&
 302                     os_strcmp(hapd->driver->name, "hostap") == 0) {
 303                         /*
 304                          * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
 305                          * but it is apparently not retried so TX Exc events
 306                          * are not received for it.
 307                          */
 308                         hdr.frame_control =
 309                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 310                                              WLAN_FC_STYPE_DATA);
 311                 } else {
 312                         hdr.frame_control =
 313                                 IEEE80211_FC(WLAN_FC_TYPE_DATA,
 314                                              WLAN_FC_STYPE_NULLFUNC);
 315                 }
 316
 317                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 318                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 319                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 320                           ETH_ALEN);
 321                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 322
 323                 if (hostapd_send_mgmt_frame(hapd, &hdr, sizeof(hdr)) < 0)
 324                         perror("ap_handle_timer: send");
 325 #endif /* CONFIG_NATIVE_WINDOWS */
 326         } else if (sta->timeout_next != STA_REMOVE) {
 327                 int deauth = sta->timeout_next == STA_DEAUTH;
 328
 329                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 330                            deauth ? "deauthentication" : "disassociation",
 331                            MAC2STR(sta->addr));
 332
 333                 if (deauth) {
 334                         hostapd_sta_deauth(hapd, sta->addr,
 335                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 336                 } else {
 337                         hostapd_sta_disassoc(
 338                                 hapd, sta->addr,
 339                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 340                 }
 341         }
 342
 343         switch (sta->timeout_next) {
 344         case STA_NULLFUNC:
 345                 sta->timeout_next = STA_DISASSOC;
 346                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 347                                        hapd, sta);
 348                 break;
 349         case STA_DISASSOC:
 350                 sta->flags &= ~WLAN_STA_ASSOC;
 351                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 352                 if (!sta->acct_terminate_cause)
 353                         sta->acct_terminate_cause =
 354                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 355                 accounting_sta_stop(hapd, sta);
 356                 ieee802_1x_free_station(sta);
 357                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 358                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 359                                "inactivity");
 360                 sta->timeout_next = STA_DEAUTH;
 361                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 362                                        hapd, sta);
 363                 mlme_disassociate_indication(
 364                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 365                 break;
 366         case STA_DEAUTH:
 367         case STA_REMOVE:
 368                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 369                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 370                                "inactivity");
 371                 if (!sta->acct_terminate_cause)
 372                         sta->acct_terminate_cause =
 373                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 374                 mlme_deauthenticate_indication(
 375                         hapd, sta,
 376                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 377                 ap_free_sta(hapd, sta);
 378                 break;
 379         }
 380 }
 381
 382
 383 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 384 {
 385         struct hostapd_data *hapd = eloop_ctx;
 386         struct sta_info *sta = timeout_ctx;
 387         u8 addr[ETH_ALEN];
 388
 389         if (!(sta->flags & WLAN_STA_AUTH))
 390                 return;
 391
 392         mlme_deauthenticate_indication(hapd, sta,
 393                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 394         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 395                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 396                        "session timeout");
 397         sta->acct_terminate_cause =
 398                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 399         os_memcpy(addr, sta->addr, ETH_ALEN);
 400         ap_free_sta(hapd, sta);
 401         hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 402 }
 403
 404
 405 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 406                             u32 session_timeout)
 407 {
 408         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 409                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 410                        "seconds", session_timeout);
 411         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 412         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 413                                hapd, sta);
 414 }
 415
 416
 417 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 418 {
 419         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 420 }
 421
 422
 423 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 424 {
 425         struct sta_info *sta;
 426
 427         sta = ap_get_sta(hapd, addr);
 428         if (sta)
 429                 return sta;
 430
 431         wpa_printf(MSG_DEBUG, "  New STA");
 432         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 433                 /* FIX: might try to remove some old STAs first? */
 434                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 435                            hapd->num_sta, hapd->conf->max_num_sta);
 436                 return NULL;
 437         }
 438
 439         sta = os_zalloc(sizeof(struct sta_info));
 440         if (sta == NULL) {
 441                 wpa_printf(MSG_ERROR, "malloc failed");
 442                 return NULL;
 443         }
 444         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 445
 446         /* initialize STA info data */
 447         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 448                                ap_handle_timer, hapd, sta);
 449         os_memcpy(sta->addr, addr, ETH_ALEN);
 450         sta->next = hapd->sta_list;
 451         hapd->sta_list = sta;
 452         hapd->num_sta++;
 453         ap_sta_hash_add(hapd, sta);
 454         sta->ssid = &hapd->conf->ssid;
 455
 456         return sta;
 457 }
 458
 459
 460 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 461 {
 462         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 463
 464         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 465                    MAC2STR(sta->addr));
 466         if (hostapd_sta_remove(hapd, sta->addr) &&
 467             sta->flags & WLAN_STA_ASSOC) {
 468                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 469                            " from kernel driver.", MAC2STR(sta->addr));
 470                 return -1;
 471         }
 472         return 0;
 473 }
 474
 475
 476 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
 477                                struct sta_info *sta, u32 flags)
 478 {
 479         struct hostapd_iface *iface = hapd->iface;
 480         size_t i;
 481
 482         for (i = 0; i < iface->num_bss; i++) {
 483                 struct hostapd_data *bss = iface->bss[i];
 484                 struct sta_info *sta2;
 485                 /* bss should always be set during operation, but it may be
 486                  * NULL during reconfiguration. Assume the STA is not
 487                  * associated to another BSS in that case to avoid NULL pointer
 488                  * dereferences. */
 489                 if (bss == hapd || bss == NULL)
 490                         continue;
 491                 sta2 = ap_get_sta(bss, sta->addr);
 492                 if (sta2 && ((sta2->flags & flags) == flags))
 493                         return 1;
 494         }
 495
 496         return 0;
 497 }
 498
 499
 500 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 501                          u16 reason)
 502 {
 503         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 504                    hapd->conf->iface, MAC2STR(sta->addr));
 505         sta->flags &= ~WLAN_STA_ASSOC;
 506         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 507                 ap_sta_remove(hapd, sta);
 508         sta->timeout_next = STA_DEAUTH;
 509         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 510         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 511                                ap_handle_timer, hapd, sta);
 512         accounting_sta_stop(hapd, sta);
 513         ieee802_1x_free_station(sta);
 514
 515         mlme_disassociate_indication(hapd, sta, reason);
 516 }
 517
 518
 519 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 520                            u16 reason)
 521 {
 522         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 523                    hapd->conf->iface, MAC2STR(sta->addr));
 524         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 525         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 526                 ap_sta_remove(hapd, sta);
 527         sta->timeout_next = STA_REMOVE;
 528         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 529         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 530                                ap_handle_timer, hapd, sta);
 531         accounting_sta_stop(hapd, sta);
 532         ieee802_1x_free_station(sta);
 533
 534         mlme_deauthenticate_indication(hapd, sta, reason);
 535 }
 536
 537
 538 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 539                      int old_vlanid)
 540 {
 541 #ifndef CONFIG_NO_VLAN
 542         const char *iface;
 543         struct hostapd_vlan *vlan = NULL;
 544
 545         /*
 546          * Do not proceed furthur if the vlan id remains same. We do not want
 547          * duplicate dynamic vlan entries.
 548          */
 549         if (sta->vlan_id == old_vlanid)
 550                 return 0;
 551
 552         /*
 553          * During 1x reauth, if the vlan id changes, then remove the old id and
 554          * proceed furthur to add the new one.
 555          */
 556         if (old_vlanid > 0)
 557                 vlan_remove_dynamic(hapd, old_vlanid);
 558
 559         iface = hapd->conf->iface;
 560         if (sta->ssid->vlan[0])
 561                 iface = sta->ssid->vlan;
 562
 563         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 564                 sta->vlan_id = 0;
 565         else if (sta->vlan_id > 0) {
 566                 vlan = hapd->conf->vlan;
 567                 while (vlan) {
 568                         if (vlan->vlan_id == sta->vlan_id ||
 569                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 570                                 iface = vlan->ifname;
 571                                 break;
 572                         }
 573                         vlan = vlan->next;
 574                 }
 575         }
 576
 577         if (sta->vlan_id > 0 && vlan == NULL) {
 578                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 579                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 580                                "binding station to (vlan_id=%d)",
 581                                sta->vlan_id);
 582                 return -1;
 583         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 584                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 585                 if (vlan == NULL) {
 586                         hostapd_logger(hapd, sta->addr,
 587                                        HOSTAPD_MODULE_IEEE80211,
 588                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 589                                        "dynamic VLAN interface for vlan_id=%d",
 590                                        sta->vlan_id);
 591                         return -1;
 592                 }
 593
 594                 iface = vlan->ifname;
 595                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 596                         hostapd_logger(hapd, sta->addr,
 597                                        HOSTAPD_MODULE_IEEE80211,
 598                                        HOSTAPD_LEVEL_DEBUG, "could not "
 599                                        "configure encryption for dynamic VLAN "
 600                                        "interface for vlan_id=%d",
 601                                        sta->vlan_id);
 602                 }
 603
 604                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 605                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 606                                "interface '%s'", iface);
 607         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 608                 if (sta->vlan_id > 0) {
 609                         vlan->dynamic_vlan++;
 610                         hostapd_logger(hapd, sta->addr,
 611                                        HOSTAPD_MODULE_IEEE80211,
 612                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 613                                        "dynamic VLAN interface '%s'", iface);
 614                 }
 615
 616                 /*
 617                  * Update encryption configuration for statically generated
 618                  * VLAN interface. This is only used for static WEP
 619                  * configuration for the case where hostapd did not yet know
 620                  * which keys are to be used when the interface was added.
 621                  */
 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 VLAN "
 627                                        "interface for vlan_id=%d",
 628                                        sta->vlan_id);
 629                 }
 630         }
 631
 632         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 633                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 634                        "'%s'", iface);
 635
 636         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 637                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 638
 639         return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 640 #else /* CONFIG_NO_VLAN */
 641         return 0;
 642 #endif /* CONFIG_NO_VLAN */
 643 }
 644
 645
 646 #ifdef CONFIG_IEEE80211W
 647
 648 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 649 {
 650         u32 tu;
 651         struct os_time now, passed;
 652         os_get_time(&now);
 653         os_time_sub(&now, &sta->sa_query_start, &passed);
 654         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 655         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 656                 hostapd_logger(hapd, sta->addr,
 657                                HOSTAPD_MODULE_IEEE80211,
 658                                HOSTAPD_LEVEL_DEBUG,
 659                                "association SA Query timed out");
 660                 sta->sa_query_timed_out = 1;
 661                 os_free(sta->sa_query_trans_id);
 662                 sta->sa_query_trans_id = NULL;
 663                 sta->sa_query_count = 0;
 664                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 665                 return 1;
 666         }
 667
 668         return 0;
 669 }
 670
 671
 672 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 673 {
 674         struct hostapd_data *hapd = eloop_ctx;
 675         struct sta_info *sta = timeout_ctx;
 676         unsigned int timeout, sec, usec;
 677         u8 *trans_id, *nbuf;
 678
 679         if (sta->sa_query_count > 0 &&
 680             ap_check_sa_query_timeout(hapd, sta))
 681                 return;
 682
 683         nbuf = os_realloc(sta->sa_query_trans_id,
 684                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 685         if (nbuf == NULL)
 686                 return;
 687         if (sta->sa_query_count == 0) {
 688                 /* Starting a new SA Query procedure */
 689                 os_get_time(&sta->sa_query_start);
 690         }
 691         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 692         sta->sa_query_trans_id = nbuf;
 693         sta->sa_query_count++;
 694
 695         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 696
 697         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 698         sec = ((timeout / 1000) * 1024) / 1000;
 699         usec = (timeout % 1000) * 1024;
 700         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 701
 702         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 703                        HOSTAPD_LEVEL_DEBUG,
 704                        "association SA Query attempt %d", sta->sa_query_count);
 705
 706 #ifdef NEED_AP_MLME
 707         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 708 #endif /* NEED_AP_MLME */
 709 }
 710
 711
 712 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 713 {
 714         ap_sa_query_timer(hapd, sta);
 715 }
 716
 717
 718 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 719 {
 720         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 721         os_free(sta->sa_query_trans_id);
 722         sta->sa_query_trans_id = NULL;
 723         sta->sa_query_count = 0;
 724 }
 725
 726 #endif /* CONFIG_IEEE80211W */