hostapd/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2007-2008, Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #include "includes.h"
  17
  18 #include "hostapd.h"
  19 #include "sta_info.h"
  20 #include "eloop.h"
  21 #include "accounting.h"
  22 #include "ieee802_1x.h"
  23 #include "ieee802_11.h"
  24 #include "radius/radius.h"
  25 #include "wpa.h"
  26 #include "preauth.h"
  27 #include "radius/radius_client.h"
  28 #include "driver.h"
  29 #include "beacon.h"
  30 #include "hw_features.h"
  31 #include "mlme.h"
  32 #include "vlan_init.h"
  33
  34 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
  35                                struct sta_info *sta, u32 flags);
  36 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  37 #ifdef CONFIG_IEEE80211W
  38 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  39 #endif /* CONFIG_IEEE80211W */
  40
  41 int ap_for_each_sta(struct hostapd_data *hapd,
  42                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  43                               void *ctx),
  44                     void *ctx)
  45 {
  46         struct sta_info *sta;
  47
  48         for (sta = hapd->sta_list; sta; sta = sta->next) {
  49                 if (cb(hapd, sta, ctx))
  50                         return 1;
  51         }
  52
  53         return 0;
  54 }
  55
  56
  57 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  58 {
  59         struct sta_info *s;
  60
  61         s = hapd->sta_hash[STA_HASH(sta)];
  62         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  63                 s = s->hnext;
  64         return s;
  65 }
  66
  67
  68 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  69 {
  70         struct sta_info *tmp;
  71
  72         if (hapd->sta_list == sta) {
  73                 hapd->sta_list = sta->next;
  74                 return;
  75         }
  76
  77         tmp = hapd->sta_list;
  78         while (tmp != NULL && tmp->next != sta)
  79                 tmp = tmp->next;
  80         if (tmp == NULL) {
  81                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
  82                            "list.", MAC2STR(sta->addr));
  83         } else
  84                 tmp->next = sta->next;
  85 }
  86
  87
  88 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
  89 {
  90         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
  91         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
  92 }
  93
  94
  95 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
  96 {
  97         struct sta_info *s;
  98
  99         s = hapd->sta_hash[STA_HASH(sta->addr)];
 100         if (s == NULL) return;
 101         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 102                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 103                 return;
 104         }
 105
 106         while (s->hnext != NULL &&
 107                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 108                 s = s->hnext;
 109         if (s->hnext != NULL)
 110                 s->hnext = s->hnext->hnext;
 111         else
 112                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 113                            " from hash table", MAC2STR(sta->addr));
 114 }
 115
 116
 117 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 118 {
 119         int set_beacon = 0;
 120
 121         accounting_sta_stop(hapd, sta);
 122
 123         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC) &&
 124             !(sta->flags & WLAN_STA_PREAUTH))
 125                 hostapd_sta_remove(hapd, sta->addr);
 126
 127         ap_sta_hash_del(hapd, sta);
 128         ap_sta_list_del(hapd, sta);
 129
 130         if (sta->aid > 0)
 131                 hapd->sta_aid[sta->aid - 1] = NULL;
 132
 133         hapd->num_sta--;
 134         if (sta->nonerp_set) {
 135                 sta->nonerp_set = 0;
 136                 hapd->iface->num_sta_non_erp--;
 137                 if (hapd->iface->num_sta_non_erp == 0)
 138                         set_beacon++;
 139         }
 140
 141         if (sta->no_short_slot_time_set) {
 142                 sta->no_short_slot_time_set = 0;
 143                 hapd->iface->num_sta_no_short_slot_time--;
 144                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 145                     && hapd->iface->num_sta_no_short_slot_time == 0)
 146                         set_beacon++;
 147         }
 148
 149         if (sta->no_short_preamble_set) {
 150                 sta->no_short_preamble_set = 0;
 151                 hapd->iface->num_sta_no_short_preamble--;
 152                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 153                     && hapd->iface->num_sta_no_short_preamble == 0)
 154                         set_beacon++;
 155         }
 156
 157 #ifdef CONFIG_IEEE80211N
 158         if (sta->no_ht_gf_set) {
 159                 sta->no_ht_gf_set = 0;
 160                 hapd->iface->num_sta_ht_no_gf--;
 161         }
 162
 163         if (sta->no_ht_set) {
 164                 sta->no_ht_set = 0;
 165                 hapd->iface->num_sta_no_ht--;
 166         }
 167
 168         if (sta->ht_20mhz_set) {
 169                 sta->ht_20mhz_set = 0;
 170                 hapd->iface->num_sta_ht_20mhz--;
 171         }
 172
 173         if (hostapd_ht_operation_update(hapd->iface) > 0)
 174                 set_beacon++;
 175 #endif /* CONFIG_IEEE80211N */
 176
 177         if (set_beacon)
 178                 ieee802_11_set_beacons(hapd->iface);
 179
 180         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 181         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 182
 183         ieee802_1x_free_station(sta);
 184         wpa_auth_sta_deinit(sta->wpa_sm);
 185         rsn_preauth_free_station(hapd, sta);
 186         radius_client_flush_auth(hapd->radius, sta->addr);
 187
 188         os_free(sta->last_assoc_req);
 189         os_free(sta->challenge);
 190
 191 #ifdef CONFIG_IEEE80211W
 192         os_free(sta->sa_query_trans_id);
 193         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 194 #endif /* CONFIG_IEEE80211W */
 195
 196         wpabuf_free(sta->wps_ie);
 197
 198         os_free(sta);
 199 }
 200
 201
 202 void hostapd_free_stas(struct hostapd_data *hapd)
 203 {
 204         struct sta_info *sta, *prev;
 205
 206         sta = hapd->sta_list;
 207
 208         while (sta) {
 209                 prev = sta;
 210                 if (sta->flags & WLAN_STA_AUTH) {
 211                         mlme_deauthenticate_indication(
 212                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 213                 }
 214                 sta = sta->next;
 215                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 216                            MAC2STR(prev->addr));
 217                 ap_free_sta(hapd, prev);
 218         }
 219 }
 220
 221
 222 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 223 {
 224         struct hostapd_data *hapd = eloop_ctx;
 225         struct sta_info *sta = timeout_ctx;
 226         unsigned long next_time = 0;
 227
 228         if (sta->timeout_next == STA_REMOVE) {
 229                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 230                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 231                                "local deauth request");
 232                 ap_free_sta(hapd, sta);
 233                 return;
 234         }
 235
 236         if ((sta->flags & WLAN_STA_ASSOC) &&
 237             (sta->timeout_next == STA_NULLFUNC ||
 238              sta->timeout_next == STA_DISASSOC)) {
 239                 int inactive_sec;
 240                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
 241                            MAC2STR(sta->addr));
 242                 inactive_sec = hostapd_get_inact_sec(hapd, sta->addr);
 243                 if (inactive_sec == -1) {
 244                         wpa_printf(MSG_DEBUG, "Could not get station info "
 245                                    "from kernel driver for " MACSTR ".",
 246                                    MAC2STR(sta->addr));
 247                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 248                            sta->flags & WLAN_STA_ASSOC) {
 249                         /* station activity detected; reset timeout state */
 250                         wpa_printf(MSG_DEBUG, "  Station has been active");
 251                         sta->timeout_next = STA_NULLFUNC;
 252                         next_time = hapd->conf->ap_max_inactivity -
 253                                 inactive_sec;
 254                 }
 255         }
 256
 257         if ((sta->flags & WLAN_STA_ASSOC) &&
 258             sta->timeout_next == STA_DISASSOC &&
 259             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 260                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
 261                 /* data nullfunc frame poll did not produce TX errors; assume
 262                  * station ACKed it */
 263                 sta->timeout_next = STA_NULLFUNC;
 264                 next_time = hapd->conf->ap_max_inactivity;
 265         }
 266
 267         if (next_time) {
 268                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 269                                        sta);
 270                 return;
 271         }
 272
 273         if (sta->timeout_next == STA_NULLFUNC &&
 274             (sta->flags & WLAN_STA_ASSOC)) {
 275                 /* send data frame to poll STA and check whether this frame
 276                  * is ACKed */
 277                 struct ieee80211_hdr hdr;
 278
 279                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 280                 sta->flags |= WLAN_STA_PENDING_POLL;
 281
 282 #ifndef CONFIG_NATIVE_WINDOWS
 283                 /* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
 284                  * it is apparently not retried so TX Exc events are not
 285                  * received for it */
 286                 os_memset(&hdr, 0, sizeof(hdr));
 287                 hdr.frame_control =
 288                         IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 289                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 290                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 291                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 292                           ETH_ALEN);
 293                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 294
 295                 if (hostapd_send_mgmt_frame(hapd, &hdr, sizeof(hdr), 0) < 0)
 296                         perror("ap_handle_timer: send");
 297 #endif /* CONFIG_NATIVE_WINDOWS */
 298         } else if (sta->timeout_next != STA_REMOVE) {
 299                 int deauth = sta->timeout_next == STA_DEAUTH;
 300
 301                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 302                            deauth ? "deauthentication" : "disassociation",
 303                            MAC2STR(sta->addr));
 304
 305                 if (deauth) {
 306                         hostapd_sta_deauth(hapd, sta->addr,
 307                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 308                 } else {
 309                         hostapd_sta_disassoc(
 310                                 hapd, sta->addr,
 311                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 312                 }
 313         }
 314
 315         switch (sta->timeout_next) {
 316         case STA_NULLFUNC:
 317                 sta->timeout_next = STA_DISASSOC;
 318                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 319                                        hapd, sta);
 320                 break;
 321         case STA_DISASSOC:
 322                 sta->flags &= ~WLAN_STA_ASSOC;
 323                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 324                 if (!sta->acct_terminate_cause)
 325                         sta->acct_terminate_cause =
 326                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 327                 accounting_sta_stop(hapd, sta);
 328                 ieee802_1x_free_station(sta);
 329                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 330                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 331                                "inactivity");
 332                 sta->timeout_next = STA_DEAUTH;
 333                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 334                                        hapd, sta);
 335                 mlme_disassociate_indication(
 336                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 337                 break;
 338         case STA_DEAUTH:
 339         case STA_REMOVE:
 340                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 341                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 342                                "inactivity");
 343                 if (!sta->acct_terminate_cause)
 344                         sta->acct_terminate_cause =
 345                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 346                 mlme_deauthenticate_indication(
 347                         hapd, sta,
 348                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 349                 ap_free_sta(hapd, sta);
 350                 break;
 351         }
 352 }
 353
 354
 355 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 356 {
 357         struct hostapd_data *hapd = eloop_ctx;
 358         struct sta_info *sta = timeout_ctx;
 359         u8 addr[ETH_ALEN];
 360
 361         if (!(sta->flags & WLAN_STA_AUTH))
 362                 return;
 363
 364         mlme_deauthenticate_indication(hapd, sta,
 365                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 366         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 367                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 368                        "session timeout");
 369         sta->acct_terminate_cause =
 370                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 371         os_memcpy(addr, sta->addr, ETH_ALEN);
 372         ap_free_sta(hapd, sta);
 373         hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 374 }
 375
 376
 377 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 378                             u32 session_timeout)
 379 {
 380         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 381                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 382                        "seconds", session_timeout);
 383         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 384         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 385                                hapd, sta);
 386 }
 387
 388
 389 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 390 {
 391         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 392 }
 393
 394
 395 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 396 {
 397         struct sta_info *sta;
 398
 399         sta = ap_get_sta(hapd, addr);
 400         if (sta)
 401                 return sta;
 402
 403         wpa_printf(MSG_DEBUG, "  New STA");
 404         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 405                 /* FIX: might try to remove some old STAs first? */
 406                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 407                            hapd->num_sta, hapd->conf->max_num_sta);
 408                 return NULL;
 409         }
 410
 411         sta = os_zalloc(sizeof(struct sta_info));
 412         if (sta == NULL) {
 413                 wpa_printf(MSG_ERROR, "malloc failed");
 414                 return NULL;
 415         }
 416         sta->acct_interim_interval = hapd->conf->radius->acct_interim_interval;
 417
 418         /* initialize STA info data */
 419         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 420                                ap_handle_timer, hapd, sta);
 421         os_memcpy(sta->addr, addr, ETH_ALEN);
 422         sta->next = hapd->sta_list;
 423         hapd->sta_list = sta;
 424         hapd->num_sta++;
 425         ap_sta_hash_add(hapd, sta);
 426         sta->ssid = &hapd->conf->ssid;
 427
 428         return sta;
 429 }
 430
 431
 432 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 433 {
 434         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 435
 436         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 437                    MAC2STR(sta->addr));
 438         if (hostapd_sta_remove(hapd, sta->addr) &&
 439             sta->flags & WLAN_STA_ASSOC) {
 440                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 441                            " from kernel driver.", MAC2STR(sta->addr));
 442                 return -1;
 443         }
 444         return 0;
 445 }
 446
 447
 448 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
 449                                struct sta_info *sta, u32 flags)
 450 {
 451         struct hostapd_iface *iface = hapd->iface;
 452         size_t i;
 453
 454         for (i = 0; i < iface->num_bss; i++) {
 455                 struct hostapd_data *bss = iface->bss[i];
 456                 struct sta_info *sta2;
 457                 /* bss should always be set during operation, but it may be
 458                  * NULL during reconfiguration. Assume the STA is not
 459                  * associated to another BSS in that case to avoid NULL pointer
 460                  * dereferences. */
 461                 if (bss == hapd || bss == NULL)
 462                         continue;
 463                 sta2 = ap_get_sta(bss, sta->addr);
 464                 if (sta2 && ((sta2->flags & flags) == flags))
 465                         return 1;
 466         }
 467
 468         return 0;
 469 }
 470
 471
 472 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 473                          u16 reason)
 474 {
 475         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 476                    hapd->conf->iface, MAC2STR(sta->addr));
 477         sta->flags &= ~WLAN_STA_ASSOC;
 478         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 479                 ap_sta_remove(hapd, sta);
 480         sta->timeout_next = STA_DEAUTH;
 481         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 482         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 483                                ap_handle_timer, hapd, sta);
 484         accounting_sta_stop(hapd, sta);
 485         ieee802_1x_free_station(sta);
 486
 487         mlme_disassociate_indication(hapd, sta, reason);
 488 }
 489
 490
 491 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 492                            u16 reason)
 493 {
 494         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 495                    hapd->conf->iface, MAC2STR(sta->addr));
 496         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 497         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 498                 ap_sta_remove(hapd, sta);
 499         sta->timeout_next = STA_REMOVE;
 500         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 501         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 502                                ap_handle_timer, hapd, sta);
 503         accounting_sta_stop(hapd, sta);
 504         ieee802_1x_free_station(sta);
 505
 506         mlme_deauthenticate_indication(hapd, sta, reason);
 507 }
 508
 509
 510 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 511                      int old_vlanid)
 512 {
 513         const char *iface;
 514         struct hostapd_vlan *vlan = NULL;
 515
 516         /*
 517          * Do not proceed furthur if the vlan id remains same. We do not want
 518          * duplicate dynamic vlan entries.
 519          */
 520         if (sta->vlan_id == old_vlanid)
 521                 return 0;
 522
 523         /*
 524          * During 1x reauth, if the vlan id changes, then remove the old id and
 525          * proceed furthur to add the new one.
 526          */
 527         if (old_vlanid > 0)
 528                 vlan_remove_dynamic(hapd, old_vlanid);
 529
 530         iface = hapd->conf->iface;
 531         if (sta->ssid->vlan[0])
 532                 iface = sta->ssid->vlan;
 533
 534         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 535                 sta->vlan_id = 0;
 536         else if (sta->vlan_id > 0) {
 537                 vlan = hapd->conf->vlan;
 538                 while (vlan) {
 539                         if (vlan->vlan_id == sta->vlan_id ||
 540                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 541                                 iface = vlan->ifname;
 542                                 break;
 543                         }
 544                         vlan = vlan->next;
 545                 }
 546         }
 547
 548         if (sta->vlan_id > 0 && vlan == NULL) {
 549                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 550                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 551                                "binding station to (vlan_id=%d)",
 552                                sta->vlan_id);
 553                 return -1;
 554         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 555                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 556                 if (vlan == NULL) {
 557                         hostapd_logger(hapd, sta->addr,
 558                                        HOSTAPD_MODULE_IEEE80211,
 559                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 560                                        "dynamic VLAN interface for vlan_id=%d",
 561                                        sta->vlan_id);
 562                         return -1;
 563                 }
 564
 565                 iface = vlan->ifname;
 566                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 567                         hostapd_logger(hapd, sta->addr,
 568                                        HOSTAPD_MODULE_IEEE80211,
 569                                        HOSTAPD_LEVEL_DEBUG, "could not "
 570                                        "configure encryption for dynamic VLAN "
 571                                        "interface for vlan_id=%d",
 572                                        sta->vlan_id);
 573                 }
 574
 575                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 576                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 577                                "interface '%s'", iface);
 578         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 579                 if (sta->vlan_id > 0) {
 580                         vlan->dynamic_vlan++;
 581                         hostapd_logger(hapd, sta->addr,
 582                                        HOSTAPD_MODULE_IEEE80211,
 583                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 584                                        "dynamic VLAN interface '%s'", iface);
 585                 }
 586
 587                 /*
 588                  * Update encryption configuration for statically generated
 589                  * VLAN interface. This is only used for static WEP
 590                  * configuration for the case where hostapd did not yet know
 591                  * which keys are to be used when the interface was added.
 592                  */
 593                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 594                         hostapd_logger(hapd, sta->addr,
 595                                        HOSTAPD_MODULE_IEEE80211,
 596                                        HOSTAPD_LEVEL_DEBUG, "could not "
 597                                        "configure encryption for VLAN "
 598                                        "interface for vlan_id=%d",
 599                                        sta->vlan_id);
 600                 }
 601         }
 602
 603         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 604                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 605                        "'%s'", iface);
 606
 607         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 608                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 609
 610         return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 611 }
 612
 613
 614 #ifdef CONFIG_IEEE80211W
 615
 616 /* MLME-SAQuery.request */
 617 static void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
 618                                          const u8 *addr, const u8 *trans_id)
 619 {
 620         struct ieee80211_mgmt mgmt;
 621         u8 *end;
 622
 623         os_memset(&mgmt, 0, sizeof(mgmt));
 624         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 625                                           WLAN_FC_STYPE_ACTION);
 626         os_memcpy(mgmt.da, addr, ETH_ALEN);
 627         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 628         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 629         mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
 630         mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
 631         os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
 632                   WLAN_SA_QUERY_TR_ID_LEN);
 633         end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
 634         if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
 635                                     end - (u8 *) &mgmt, 0) < 0)
 636                 perror("ieee802_11_send_sa_query_req: send");
 637 }
 638
 639
 640 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 641 {
 642         struct hostapd_data *hapd = eloop_ctx;
 643         struct sta_info *sta = timeout_ctx;
 644         unsigned int timeout, sec, usec;
 645         u8 *trans_id, *nbuf;
 646
 647         if (sta->sa_query_count >= hapd->conf->assoc_ping_attempts) {
 648                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 649                                HOSTAPD_LEVEL_DEBUG,
 650                                "association SA Query timed out");
 651                 sta->sa_query_timed_out = 1;
 652                 os_free(sta->sa_query_trans_id);
 653                 sta->sa_query_trans_id = NULL;
 654                 sta->sa_query_count = 0;
 655                 return;
 656         }
 657
 658         nbuf = os_realloc(sta->sa_query_trans_id,
 659                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 660         if (nbuf == NULL)
 661                 return;
 662         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 663         sta->sa_query_trans_id = nbuf;
 664         sta->sa_query_count++;
 665
 666         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 667
 668         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 669                        HOSTAPD_LEVEL_DEBUG,
 670                        "association SA Query attempt %d", sta->sa_query_count);
 671
 672         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 673
 674         timeout = hapd->conf->assoc_ping_timeout;
 675         sec = ((timeout / 1000) * 1024) / 1000;
 676         usec = (timeout % 1000) * 1024;
 677         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 678 }
 679
 680
 681 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 682 {
 683         ap_sa_query_timer(hapd, sta);
 684 }
 685
 686
 687 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 688 {
 689         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 690         os_free(sta->sa_query_trans_id);
 691         sta->sa_query_trans_id = NULL;
 692         sta->sa_query_count = 0;
 693 }
 694
 695 #endif /* CONFIG_IEEE80211W */