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 "hostapd.h"
  24 #include "accounting.h"
  25 #include "ieee802_1x.h"
  26 #include "ieee802_11.h"
  27 #include "wpa_auth.h"
  28 #include "preauth_auth.h"
  29 #include "ap_config.h"
  30 #include "beacon.h"
  31 #include "ap_mlme.h"
  32 #include "vlan_init.h"
  33 #include "sta_info.h"
  34
  35 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
  36                                        struct sta_info *sta);
  37 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  38 #ifdef CONFIG_IEEE80211W
  39 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  40 #endif /* CONFIG_IEEE80211W */
  41
  42 int ap_for_each_sta(struct hostapd_data *hapd,
  43                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  44                               void *ctx),
  45                     void *ctx)
  46 {
  47         struct sta_info *sta;
  48
  49         for (sta = hapd->sta_list; sta; sta = sta->next) {
  50                 if (cb(hapd, sta, ctx))
  51                         return 1;
  52         }
  53
  54         return 0;
  55 }
  56
  57
  58 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  59 {
  60         struct sta_info *s;
  61
  62         s = hapd->sta_hash[STA_HASH(sta)];
  63         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  64                 s = s->hnext;
  65         return s;
  66 }
  67
  68
  69 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  70 {
  71         struct sta_info *tmp;
  72
  73         if (hapd->sta_list == sta) {
  74                 hapd->sta_list = sta->next;
  75                 return;
  76         }
  77
  78         tmp = hapd->sta_list;
  79         while (tmp != NULL && tmp->next != sta)
  80                 tmp = tmp->next;
  81         if (tmp == NULL) {
  82                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
  83                            "list.", MAC2STR(sta->addr));
  84         } else
  85                 tmp->next = sta->next;
  86 }
  87
  88
  89 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
  90 {
  91         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
  92         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
  93 }
  94
  95
  96 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
  97 {
  98         struct sta_info *s;
  99
 100         s = hapd->sta_hash[STA_HASH(sta->addr)];
 101         if (s == NULL) return;
 102         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 103                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 104                 return;
 105         }
 106
 107         while (s->hnext != NULL &&
 108                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 109                 s = s->hnext;
 110         if (s->hnext != NULL)
 111                 s->hnext = s->hnext->hnext;
 112         else
 113                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 114                            " from hash table", MAC2STR(sta->addr));
 115 }
 116
 117
 118 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 119 {
 120         int set_beacon = 0;
 121
 122         accounting_sta_stop(hapd, sta);
 123
 124         if (sta->flags & WLAN_STA_WDS)
 125                 hapd->drv.set_wds_sta(hapd, sta->addr, sta->aid, 0);
 126
 127         if (!(sta->flags & WLAN_STA_PREAUTH))
 128                 hapd->drv.sta_remove(hapd, sta->addr);
 129
 130         ap_sta_hash_del(hapd, sta);
 131         ap_sta_list_del(hapd, sta);
 132
 133         if (sta->aid > 0)
 134                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 135                         ~BIT((sta->aid - 1) % 32);
 136
 137         hapd->num_sta--;
 138         if (sta->nonerp_set) {
 139                 sta->nonerp_set = 0;
 140                 hapd->iface->num_sta_non_erp--;
 141                 if (hapd->iface->num_sta_non_erp == 0)
 142                         set_beacon++;
 143         }
 144
 145         if (sta->no_short_slot_time_set) {
 146                 sta->no_short_slot_time_set = 0;
 147                 hapd->iface->num_sta_no_short_slot_time--;
 148                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 149                     && hapd->iface->num_sta_no_short_slot_time == 0)
 150                         set_beacon++;
 151         }
 152
 153         if (sta->no_short_preamble_set) {
 154                 sta->no_short_preamble_set = 0;
 155                 hapd->iface->num_sta_no_short_preamble--;
 156                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 157                     && hapd->iface->num_sta_no_short_preamble == 0)
 158                         set_beacon++;
 159         }
 160
 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 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 177         if (hostapd_ht_operation_update(hapd->iface) > 0)
 178                 set_beacon++;
 179 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 180
 181         if (set_beacon)
 182                 ieee802_11_set_beacons(hapd->iface);
 183
 184         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 185         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 186
 187         ieee802_1x_free_station(sta);
 188         wpa_auth_sta_deinit(sta->wpa_sm);
 189         rsn_preauth_free_station(hapd, sta);
 190 #ifndef CONFIG_NO_RADIUS
 191         radius_client_flush_auth(hapd->radius, sta->addr);
 192 #endif /* CONFIG_NO_RADIUS */
 193
 194         os_free(sta->last_assoc_req);
 195         os_free(sta->challenge);
 196
 197 #ifdef CONFIG_IEEE80211W
 198         os_free(sta->sa_query_trans_id);
 199         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 200 #endif /* CONFIG_IEEE80211W */
 201
 202         wpabuf_free(sta->wps_ie);
 203         wpabuf_free(sta->p2p_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 = hapd->drv.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 #ifndef CONFIG_NATIVE_WINDOWS
 293                 /* send data frame to poll STA and check whether this frame
 294                  * is ACKed */
 295                 struct ieee80211_hdr hdr;
 296
 297                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 298                 sta->flags |= WLAN_STA_PENDING_POLL;
 299
 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 (hapd->drv.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                         hapd->drv.sta_deauth(hapd, sta->addr,
 335                                              WLAN_REASON_PREV_AUTH_NOT_VALID);
 336                 } else {
 337                         hapd->drv.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         hapd->drv.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         ap_sta_remove_in_other_bss(hapd, sta);
 456
 457         return sta;
 458 }
 459
 460
 461 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 462 {
 463         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 464
 465         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 466                    MAC2STR(sta->addr));
 467         if (hapd->drv.sta_remove(hapd, sta->addr) &&
 468             sta->flags & WLAN_STA_ASSOC) {
 469                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 470                            " from kernel driver.", MAC2STR(sta->addr));
 471                 return -1;
 472         }
 473         return 0;
 474 }
 475
 476
 477 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 478                                        struct sta_info *sta)
 479 {
 480         struct hostapd_iface *iface = hapd->iface;
 481         size_t i;
 482
 483         for (i = 0; i < iface->num_bss; i++) {
 484                 struct hostapd_data *bss = iface->bss[i];
 485                 struct sta_info *sta2;
 486                 /* bss should always be set during operation, but it may be
 487                  * NULL during reconfiguration. Assume the STA is not
 488                  * associated to another BSS in that case to avoid NULL pointer
 489                  * dereferences. */
 490                 if (bss == hapd || bss == NULL)
 491                         continue;
 492                 sta2 = ap_get_sta(bss, sta->addr);
 493                 if (!sta2)
 494                         continue;
 495
 496                 ap_sta_disconnect(bss, sta2, sta2->addr,
 497                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 498         }
 499 }
 500
 501
 502 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 503                          u16 reason)
 504 {
 505         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 506                    hapd->conf->iface, MAC2STR(sta->addr));
 507         sta->flags &= ~WLAN_STA_ASSOC;
 508         ap_sta_remove(hapd, sta);
 509         sta->timeout_next = STA_DEAUTH;
 510         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 511         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 512                                ap_handle_timer, hapd, sta);
 513         accounting_sta_stop(hapd, sta);
 514         ieee802_1x_free_station(sta);
 515
 516         mlme_disassociate_indication(hapd, sta, reason);
 517 }
 518
 519
 520 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 521                            u16 reason)
 522 {
 523         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 524                    hapd->conf->iface, MAC2STR(sta->addr));
 525         sta->flags &= ~(WLAN_STA_AUTH | 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         int ret;
 545
 546         /*
 547          * Do not proceed furthur if the vlan id remains same. We do not want
 548          * duplicate dynamic vlan entries.
 549          */
 550         if (sta->vlan_id == old_vlanid)
 551                 return 0;
 552
 553         /*
 554          * During 1x reauth, if the vlan id changes, then remove the old id and
 555          * proceed furthur to add the new one.
 556          */
 557         if (old_vlanid > 0)
 558                 vlan_remove_dynamic(hapd, old_vlanid);
 559
 560         iface = hapd->conf->iface;
 561         if (sta->ssid->vlan[0])
 562                 iface = sta->ssid->vlan;
 563
 564         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 565                 sta->vlan_id = 0;
 566         else if (sta->vlan_id > 0) {
 567                 vlan = hapd->conf->vlan;
 568                 while (vlan) {
 569                         if (vlan->vlan_id == sta->vlan_id ||
 570                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 571                                 iface = vlan->ifname;
 572                                 break;
 573                         }
 574                         vlan = vlan->next;
 575                 }
 576         }
 577
 578         if (sta->vlan_id > 0 && vlan == NULL) {
 579                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 580                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 581                                "binding station to (vlan_id=%d)",
 582                                sta->vlan_id);
 583                 return -1;
 584         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 585                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 586                 if (vlan == NULL) {
 587                         hostapd_logger(hapd, sta->addr,
 588                                        HOSTAPD_MODULE_IEEE80211,
 589                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 590                                        "dynamic VLAN interface for vlan_id=%d",
 591                                        sta->vlan_id);
 592                         return -1;
 593                 }
 594
 595                 iface = vlan->ifname;
 596                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 597                         hostapd_logger(hapd, sta->addr,
 598                                        HOSTAPD_MODULE_IEEE80211,
 599                                        HOSTAPD_LEVEL_DEBUG, "could not "
 600                                        "configure encryption for dynamic VLAN "
 601                                        "interface for vlan_id=%d",
 602                                        sta->vlan_id);
 603                 }
 604
 605                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 606                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 607                                "interface '%s'", iface);
 608         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 609                 if (sta->vlan_id > 0) {
 610                         vlan->dynamic_vlan++;
 611                         hostapd_logger(hapd, sta->addr,
 612                                        HOSTAPD_MODULE_IEEE80211,
 613                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 614                                        "dynamic VLAN interface '%s'", iface);
 615                 }
 616
 617                 /*
 618                  * Update encryption configuration for statically generated
 619                  * VLAN interface. This is only used for static WEP
 620                  * configuration for the case where hostapd did not yet know
 621                  * which keys are to be used when the interface was added.
 622                  */
 623                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 624                         hostapd_logger(hapd, sta->addr,
 625                                        HOSTAPD_MODULE_IEEE80211,
 626                                        HOSTAPD_LEVEL_DEBUG, "could not "
 627                                        "configure encryption for VLAN "
 628                                        "interface for vlan_id=%d",
 629                                        sta->vlan_id);
 630                 }
 631         }
 632
 633         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 634                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 635                        "'%s'", iface);
 636
 637         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 638                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 639
 640         ret = hapd->drv.set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 641         if (ret < 0) {
 642                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 643                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 644                                "entry to vlan_id=%d", sta->vlan_id);
 645         }
 646         return ret;
 647 #else /* CONFIG_NO_VLAN */
 648         return 0;
 649 #endif /* CONFIG_NO_VLAN */
 650 }
 651
 652
 653 #ifdef CONFIG_IEEE80211W
 654
 655 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 656 {
 657         u32 tu;
 658         struct os_time now, passed;
 659         os_get_time(&now);
 660         os_time_sub(&now, &sta->sa_query_start, &passed);
 661         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 662         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 663                 hostapd_logger(hapd, sta->addr,
 664                                HOSTAPD_MODULE_IEEE80211,
 665                                HOSTAPD_LEVEL_DEBUG,
 666                                "association SA Query timed out");
 667                 sta->sa_query_timed_out = 1;
 668                 os_free(sta->sa_query_trans_id);
 669                 sta->sa_query_trans_id = NULL;
 670                 sta->sa_query_count = 0;
 671                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 672                 return 1;
 673         }
 674
 675         return 0;
 676 }
 677
 678
 679 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 680 {
 681         struct hostapd_data *hapd = eloop_ctx;
 682         struct sta_info *sta = timeout_ctx;
 683         unsigned int timeout, sec, usec;
 684         u8 *trans_id, *nbuf;
 685
 686         if (sta->sa_query_count > 0 &&
 687             ap_check_sa_query_timeout(hapd, sta))
 688                 return;
 689
 690         nbuf = os_realloc(sta->sa_query_trans_id,
 691                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 692         if (nbuf == NULL)
 693                 return;
 694         if (sta->sa_query_count == 0) {
 695                 /* Starting a new SA Query procedure */
 696                 os_get_time(&sta->sa_query_start);
 697         }
 698         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 699         sta->sa_query_trans_id = nbuf;
 700         sta->sa_query_count++;
 701
 702         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 703
 704         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 705         sec = ((timeout / 1000) * 1024) / 1000;
 706         usec = (timeout % 1000) * 1024;
 707         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 708
 709         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 710                        HOSTAPD_LEVEL_DEBUG,
 711                        "association SA Query attempt %d", sta->sa_query_count);
 712
 713 #ifdef NEED_AP_MLME
 714         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 715 #endif /* NEED_AP_MLME */
 716 }
 717
 718
 719 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 720 {
 721         ap_sa_query_timer(hapd, sta);
 722 }
 723
 724
 725 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 726 {
 727         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 728         os_free(sta->sa_query_trans_id);
 729         sta->sa_query_trans_id = NULL;
 730         sta->sa_query_count = 0;
 731 }
 732
 733 #endif /* CONFIG_IEEE80211W */
 734
 735
 736 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 737                        const u8 *addr, u16 reason)
 738 {
 739
 740         if (sta == NULL && addr)
 741                 sta = ap_get_sta(hapd, addr);
 742
 743         if (addr)
 744                 hapd->drv.sta_deauth(hapd, addr, reason);
 745
 746         if (sta == NULL)
 747                 return;
 748         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_AUTHORIZED);
 749         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 750         eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
 751         sta->timeout_next = STA_REMOVE;
 752 }