src/ap/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "radius/radius.h"
  16 #include "radius/radius_client.h"
  17 #include "drivers/driver.h"
  18 #include "p2p/p2p.h"
  19 #include "hostapd.h"
  20 #include "accounting.h"
  21 #include "ieee802_1x.h"
  22 #include "ieee802_11.h"
  23 #include "wpa_auth.h"
  24 #include "preauth_auth.h"
  25 #include "ap_config.h"
  26 #include "beacon.h"
  27 #include "ap_mlme.h"
  28 #include "vlan_init.h"
  29 #include "p2p_hostapd.h"
  30 #include "ap_drv_ops.h"
  31 #include "gas_serv.h"
  32 #include "sta_info.h"
  33
  34 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
  35                                        struct sta_info *sta);
  36 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  37 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx);
  38 static void ap_sta_disassoc_cb_timeout(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 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta);
  43
  44 int ap_for_each_sta(struct hostapd_data *hapd,
  45                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  46                               void *ctx),
  47                     void *ctx)
  48 {
  49         struct sta_info *sta;
  50
  51         for (sta = hapd->sta_list; sta; sta = sta->next) {
  52                 if (cb(hapd, sta, ctx))
  53                         return 1;
  54         }
  55
  56         return 0;
  57 }
  58
  59
  60 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  61 {
  62         struct sta_info *s;
  63
  64         s = hapd->sta_hash[STA_HASH(sta)];
  65         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  66                 s = s->hnext;
  67         return s;
  68 }
  69
  70
  71 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  72 {
  73         struct sta_info *tmp;
  74
  75         if (hapd->sta_list == sta) {
  76                 hapd->sta_list = sta->next;
  77                 return;
  78         }
  79
  80         tmp = hapd->sta_list;
  81         while (tmp != NULL && tmp->next != sta)
  82                 tmp = tmp->next;
  83         if (tmp == NULL) {
  84                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
  85                            "list.", MAC2STR(sta->addr));
  86         } else
  87                 tmp->next = sta->next;
  88 }
  89
  90
  91 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
  92 {
  93         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
  94         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
  95 }
  96
  97
  98 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
  99 {
 100         struct sta_info *s;
 101
 102         s = hapd->sta_hash[STA_HASH(sta->addr)];
 103         if (s == NULL) return;
 104         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 105                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 106                 return;
 107         }
 108
 109         while (s->hnext != NULL &&
 110                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 111                 s = s->hnext;
 112         if (s->hnext != NULL)
 113                 s->hnext = s->hnext->hnext;
 114         else
 115                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 116                            " from hash table", MAC2STR(sta->addr));
 117 }
 118
 119
 120 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 121 {
 122         int set_beacon = 0;
 123
 124         accounting_sta_stop(hapd, sta);
 125
 126         /* just in case */
 127         ap_sta_set_authorized(hapd, sta, 0);
 128
 129         if (sta->flags & WLAN_STA_WDS)
 130                 hostapd_set_wds_sta(hapd, sta->addr, sta->aid, 0);
 131
 132         if (!(sta->flags & WLAN_STA_PREAUTH))
 133                 hostapd_drv_sta_remove(hapd, sta->addr);
 134
 135         ap_sta_hash_del(hapd, sta);
 136         ap_sta_list_del(hapd, sta);
 137
 138         if (sta->aid > 0)
 139                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 140                         ~BIT((sta->aid - 1) % 32);
 141
 142         hapd->num_sta--;
 143         if (sta->nonerp_set) {
 144                 sta->nonerp_set = 0;
 145                 hapd->iface->num_sta_non_erp--;
 146                 if (hapd->iface->num_sta_non_erp == 0)
 147                         set_beacon++;
 148         }
 149
 150         if (sta->no_short_slot_time_set) {
 151                 sta->no_short_slot_time_set = 0;
 152                 hapd->iface->num_sta_no_short_slot_time--;
 153                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 154                     && hapd->iface->num_sta_no_short_slot_time == 0)
 155                         set_beacon++;
 156         }
 157
 158         if (sta->no_short_preamble_set) {
 159                 sta->no_short_preamble_set = 0;
 160                 hapd->iface->num_sta_no_short_preamble--;
 161                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 162                     && hapd->iface->num_sta_no_short_preamble == 0)
 163                         set_beacon++;
 164         }
 165
 166         if (sta->no_ht_gf_set) {
 167                 sta->no_ht_gf_set = 0;
 168                 hapd->iface->num_sta_ht_no_gf--;
 169         }
 170
 171         if (sta->no_ht_set) {
 172                 sta->no_ht_set = 0;
 173                 hapd->iface->num_sta_no_ht--;
 174         }
 175
 176         if (sta->ht_20mhz_set) {
 177                 sta->ht_20mhz_set = 0;
 178                 hapd->iface->num_sta_ht_20mhz--;
 179         }
 180
 181 #ifdef CONFIG_P2P
 182         if (sta->no_p2p_set) {
 183                 sta->no_p2p_set = 0;
 184                 hapd->num_sta_no_p2p--;
 185                 if (hapd->num_sta_no_p2p == 0)
 186                         hostapd_p2p_non_p2p_sta_disconnected(hapd);
 187         }
 188 #endif /* CONFIG_P2P */
 189
 190 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 191         if (hostapd_ht_operation_update(hapd->iface) > 0)
 192                 set_beacon++;
 193 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 194
 195         if (set_beacon)
 196                 ieee802_11_set_beacons(hapd->iface);
 197
 198         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 199         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 200         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 201         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 202
 203         ieee802_1x_free_station(sta);
 204         wpa_auth_sta_deinit(sta->wpa_sm);
 205         rsn_preauth_free_station(hapd, sta);
 206 #ifndef CONFIG_NO_RADIUS
 207         radius_client_flush_auth(hapd->radius, sta->addr);
 208 #endif /* CONFIG_NO_RADIUS */
 209
 210         os_free(sta->last_assoc_req);
 211         os_free(sta->challenge);
 212
 213 #ifdef CONFIG_IEEE80211W
 214         os_free(sta->sa_query_trans_id);
 215         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 216 #endif /* CONFIG_IEEE80211W */
 217
 218 #ifdef CONFIG_P2P
 219         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 220 #endif /* CONFIG_P2P */
 221
 222 #ifdef CONFIG_INTERWORKING
 223         if (sta->gas_dialog) {
 224                 int i;
 225                 for (i = 0; i < GAS_DIALOG_MAX; i++)
 226                         gas_serv_dialog_clear(&sta->gas_dialog[i]);
 227                 os_free(sta->gas_dialog);
 228         }
 229 #endif /* CONFIG_INTERWORKING */
 230
 231         wpabuf_free(sta->wps_ie);
 232         wpabuf_free(sta->p2p_ie);
 233
 234         os_free(sta->ht_capabilities);
 235         os_free(sta->psk);
 236
 237         os_free(sta);
 238 }
 239
 240
 241 void hostapd_free_stas(struct hostapd_data *hapd)
 242 {
 243         struct sta_info *sta, *prev;
 244
 245         sta = hapd->sta_list;
 246
 247         while (sta) {
 248                 prev = sta;
 249                 if (sta->flags & WLAN_STA_AUTH) {
 250                         mlme_deauthenticate_indication(
 251                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 252                 }
 253                 sta = sta->next;
 254                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 255                            MAC2STR(prev->addr));
 256                 ap_free_sta(hapd, prev);
 257         }
 258 }
 259
 260
 261 /**
 262  * ap_handle_timer - Per STA timer handler
 263  * @eloop_ctx: struct hostapd_data *
 264  * @timeout_ctx: struct sta_info *
 265  *
 266  * This function is called to check station activity and to remove inactive
 267  * stations.
 268  */
 269 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 270 {
 271         struct hostapd_data *hapd = eloop_ctx;
 272         struct sta_info *sta = timeout_ctx;
 273         unsigned long next_time = 0;
 274
 275         if (sta->timeout_next == STA_REMOVE) {
 276                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 277                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 278                                "local deauth request");
 279                 ap_free_sta(hapd, sta);
 280                 return;
 281         }
 282
 283         if ((sta->flags & WLAN_STA_ASSOC) &&
 284             (sta->timeout_next == STA_NULLFUNC ||
 285              sta->timeout_next == STA_DISASSOC)) {
 286                 int inactive_sec;
 287                 /*
 288                  * Add random value to timeout so that we don't end up bouncing
 289                  * all stations at the same time if we have lots of associated
 290                  * stations that are idle (but keep re-associating).
 291                  */
 292                 int fuzz = os_random() % 20;
 293                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 294                 if (inactive_sec == -1) {
 295                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 296                                 "Check inactivity: Could not "
 297                                 "get station info from kernel driver for "
 298                                 MACSTR, MAC2STR(sta->addr));
 299                         /*
 300                          * The driver may not support this functionality.
 301                          * Anyway, try again after the next inactivity timeout,
 302                          * but do not disconnect the station now.
 303                          */
 304                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 305                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 306                            sta->flags & WLAN_STA_ASSOC) {
 307                         /* station activity detected; reset timeout state */
 308                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 309                                 "Station " MACSTR " has been active %is ago",
 310                                 MAC2STR(sta->addr), inactive_sec);
 311                         sta->timeout_next = STA_NULLFUNC;
 312                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 313                                 inactive_sec;
 314                 } else {
 315                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 316                                 "Station " MACSTR " has been "
 317                                 "inactive too long: %d sec, max allowed: %d",
 318                                 MAC2STR(sta->addr), inactive_sec,
 319                                 hapd->conf->ap_max_inactivity);
 320
 321                         if (hapd->conf->skip_inactivity_poll)
 322                                 sta->timeout_next = STA_DISASSOC;
 323                 }
 324         }
 325
 326         if ((sta->flags & WLAN_STA_ASSOC) &&
 327             sta->timeout_next == STA_DISASSOC &&
 328             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 329             !hapd->conf->skip_inactivity_poll) {
 330                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 331                         " has ACKed data poll", MAC2STR(sta->addr));
 332                 /* data nullfunc frame poll did not produce TX errors; assume
 333                  * station ACKed it */
 334                 sta->timeout_next = STA_NULLFUNC;
 335                 next_time = hapd->conf->ap_max_inactivity;
 336         }
 337
 338         if (next_time) {
 339                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 340                                        sta);
 341                 return;
 342         }
 343
 344         if (sta->timeout_next == STA_NULLFUNC &&
 345             (sta->flags & WLAN_STA_ASSOC)) {
 346                 wpa_printf(MSG_DEBUG, "  Polling STA");
 347                 sta->flags |= WLAN_STA_PENDING_POLL;
 348                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 349                                         sta->flags & WLAN_STA_WMM);
 350         } else if (sta->timeout_next != STA_REMOVE) {
 351                 int deauth = sta->timeout_next == STA_DEAUTH;
 352
 353                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 354                         "Timeout, 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                 ap_sta_set_authorized(hapd, sta, 0);
 377                 sta->flags &= ~WLAN_STA_ASSOC;
 378                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 379                 if (!sta->acct_terminate_cause)
 380                         sta->acct_terminate_cause =
 381                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 382                 accounting_sta_stop(hapd, sta);
 383                 ieee802_1x_free_station(sta);
 384                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 385                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 386                                "inactivity");
 387                 sta->timeout_next = STA_DEAUTH;
 388                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 389                                        hapd, sta);
 390                 mlme_disassociate_indication(
 391                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 392                 break;
 393         case STA_DEAUTH:
 394         case STA_REMOVE:
 395                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 396                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 397                                "inactivity (timer DEAUTH/REMOVE)");
 398                 if (!sta->acct_terminate_cause)
 399                         sta->acct_terminate_cause =
 400                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 401                 mlme_deauthenticate_indication(
 402                         hapd, sta,
 403                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 404                 ap_free_sta(hapd, sta);
 405                 break;
 406         }
 407 }
 408
 409
 410 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 411 {
 412         struct hostapd_data *hapd = eloop_ctx;
 413         struct sta_info *sta = timeout_ctx;
 414         u8 addr[ETH_ALEN];
 415
 416         if (!(sta->flags & WLAN_STA_AUTH)) {
 417                 if (sta->flags & WLAN_STA_GAS) {
 418                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 419                                    "entry " MACSTR, MAC2STR(sta->addr));
 420                         ap_free_sta(hapd, sta);
 421                 }
 422                 return;
 423         }
 424
 425         mlme_deauthenticate_indication(hapd, sta,
 426                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 427         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 428                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 429                        "session timeout");
 430         sta->acct_terminate_cause =
 431                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 432         os_memcpy(addr, sta->addr, ETH_ALEN);
 433         ap_free_sta(hapd, sta);
 434         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 435 }
 436
 437
 438 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 439                             u32 session_timeout)
 440 {
 441         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 442                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 443                        "seconds", session_timeout);
 444         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 445         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 446                                hapd, sta);
 447 }
 448
 449
 450 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 451 {
 452         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 453 }
 454
 455
 456 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 457 {
 458         struct sta_info *sta;
 459
 460         sta = ap_get_sta(hapd, addr);
 461         if (sta)
 462                 return sta;
 463
 464         wpa_printf(MSG_DEBUG, "  New STA");
 465         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 466                 /* FIX: might try to remove some old STAs first? */
 467                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 468                            hapd->num_sta, hapd->conf->max_num_sta);
 469                 return NULL;
 470         }
 471
 472         sta = os_zalloc(sizeof(struct sta_info));
 473         if (sta == NULL) {
 474                 wpa_printf(MSG_ERROR, "malloc failed");
 475                 return NULL;
 476         }
 477         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 478
 479         /* initialize STA info data */
 480         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 481                                ap_handle_timer, hapd, sta);
 482         os_memcpy(sta->addr, addr, ETH_ALEN);
 483         sta->next = hapd->sta_list;
 484         hapd->sta_list = sta;
 485         hapd->num_sta++;
 486         ap_sta_hash_add(hapd, sta);
 487         sta->ssid = &hapd->conf->ssid;
 488         ap_sta_remove_in_other_bss(hapd, sta);
 489
 490         return sta;
 491 }
 492
 493
 494 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 495 {
 496         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 497
 498         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 499                    MAC2STR(sta->addr));
 500         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 501             sta->flags & WLAN_STA_ASSOC) {
 502                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 503                            " from kernel driver.", MAC2STR(sta->addr));
 504                 return -1;
 505         }
 506         return 0;
 507 }
 508
 509
 510 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 511                                        struct sta_info *sta)
 512 {
 513         struct hostapd_iface *iface = hapd->iface;
 514         size_t i;
 515
 516         for (i = 0; i < iface->num_bss; i++) {
 517                 struct hostapd_data *bss = iface->bss[i];
 518                 struct sta_info *sta2;
 519                 /* bss should always be set during operation, but it may be
 520                  * NULL during reconfiguration. Assume the STA is not
 521                  * associated to another BSS in that case to avoid NULL pointer
 522                  * dereferences. */
 523                 if (bss == hapd || bss == NULL)
 524                         continue;
 525                 sta2 = ap_get_sta(bss, sta->addr);
 526                 if (!sta2)
 527                         continue;
 528
 529                 ap_sta_disconnect(bss, sta2, sta2->addr,
 530                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 531         }
 532 }
 533
 534
 535 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 536 {
 537         struct hostapd_data *hapd = eloop_ctx;
 538         struct sta_info *sta = timeout_ctx;
 539
 540         ap_sta_remove(hapd, sta);
 541         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 542 }
 543
 544
 545 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 546                          u16 reason)
 547 {
 548         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 549                    hapd->conf->iface, MAC2STR(sta->addr));
 550         sta->flags &= ~WLAN_STA_ASSOC;
 551         ap_sta_set_authorized(hapd, sta, 0);
 552         sta->timeout_next = STA_DEAUTH;
 553         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 554         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 555                                ap_handle_timer, hapd, sta);
 556         accounting_sta_stop(hapd, sta);
 557         ieee802_1x_free_station(sta);
 558
 559         sta->disassoc_reason = reason;
 560         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 561         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 562         eloop_register_timeout(hapd->iface->drv_flags &
 563                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 564                                ap_sta_disassoc_cb_timeout, hapd, sta);
 565 }
 566
 567
 568 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 569 {
 570         struct hostapd_data *hapd = eloop_ctx;
 571         struct sta_info *sta = timeout_ctx;
 572
 573         ap_sta_remove(hapd, sta);
 574         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 575 }
 576
 577
 578 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 579                            u16 reason)
 580 {
 581         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 582                    hapd->conf->iface, MAC2STR(sta->addr));
 583         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 584         ap_sta_set_authorized(hapd, sta, 0);
 585         sta->timeout_next = STA_REMOVE;
 586         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 587         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 588                                ap_handle_timer, hapd, sta);
 589         accounting_sta_stop(hapd, sta);
 590         ieee802_1x_free_station(sta);
 591
 592         sta->deauth_reason = reason;
 593         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 594         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 595         eloop_register_timeout(hapd->iface->drv_flags &
 596                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 597                                ap_sta_deauth_cb_timeout, hapd, sta);
 598 }
 599
 600
 601 #ifdef CONFIG_WPS
 602 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 603                       struct sta_info *sta, void *ctx)
 604 {
 605         if (sta && (sta->flags & WLAN_STA_WPS)) {
 606                 ap_sta_deauthenticate(hapd, sta,
 607                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 608                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 609                            __func__, MAC2STR(sta->addr));
 610                 return 1;
 611         }
 612
 613         return 0;
 614 }
 615 #endif /* CONFIG_WPS */
 616
 617
 618 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 619                      int old_vlanid)
 620 {
 621 #ifndef CONFIG_NO_VLAN
 622         const char *iface;
 623         struct hostapd_vlan *vlan = NULL;
 624         int ret;
 625
 626         /*
 627          * Do not proceed furthur if the vlan id remains same. We do not want
 628          * duplicate dynamic vlan entries.
 629          */
 630         if (sta->vlan_id == old_vlanid)
 631                 return 0;
 632
 633         /*
 634          * During 1x reauth, if the vlan id changes, then remove the old id and
 635          * proceed furthur to add the new one.
 636          */
 637         if (old_vlanid > 0)
 638                 vlan_remove_dynamic(hapd, old_vlanid);
 639
 640         iface = hapd->conf->iface;
 641         if (sta->ssid->vlan[0])
 642                 iface = sta->ssid->vlan;
 643
 644         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 645                 sta->vlan_id = 0;
 646         else if (sta->vlan_id > 0) {
 647                 vlan = hapd->conf->vlan;
 648                 while (vlan) {
 649                         if (vlan->vlan_id == sta->vlan_id ||
 650                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 651                                 iface = vlan->ifname;
 652                                 break;
 653                         }
 654                         vlan = vlan->next;
 655                 }
 656         }
 657
 658         if (sta->vlan_id > 0 && vlan == NULL) {
 659                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 660                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 661                                "binding station to (vlan_id=%d)",
 662                                sta->vlan_id);
 663                 return -1;
 664         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 665                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 666                 if (vlan == NULL) {
 667                         hostapd_logger(hapd, sta->addr,
 668                                        HOSTAPD_MODULE_IEEE80211,
 669                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 670                                        "dynamic VLAN interface for vlan_id=%d",
 671                                        sta->vlan_id);
 672                         return -1;
 673                 }
 674
 675                 iface = vlan->ifname;
 676                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 677                         hostapd_logger(hapd, sta->addr,
 678                                        HOSTAPD_MODULE_IEEE80211,
 679                                        HOSTAPD_LEVEL_DEBUG, "could not "
 680                                        "configure encryption for dynamic VLAN "
 681                                        "interface for vlan_id=%d",
 682                                        sta->vlan_id);
 683                 }
 684
 685                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 686                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 687                                "interface '%s'", iface);
 688         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 689                 if (sta->vlan_id > 0) {
 690                         vlan->dynamic_vlan++;
 691                         hostapd_logger(hapd, sta->addr,
 692                                        HOSTAPD_MODULE_IEEE80211,
 693                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 694                                        "dynamic VLAN interface '%s'", iface);
 695                 }
 696
 697                 /*
 698                  * Update encryption configuration for statically generated
 699                  * VLAN interface. This is only used for static WEP
 700                  * configuration for the case where hostapd did not yet know
 701                  * which keys are to be used when the interface was added.
 702                  */
 703                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 704                         hostapd_logger(hapd, sta->addr,
 705                                        HOSTAPD_MODULE_IEEE80211,
 706                                        HOSTAPD_LEVEL_DEBUG, "could not "
 707                                        "configure encryption for VLAN "
 708                                        "interface for vlan_id=%d",
 709                                        sta->vlan_id);
 710                 }
 711         }
 712
 713         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 714                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 715                        "'%s'", iface);
 716
 717         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 718                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 719
 720         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 721         if (ret < 0) {
 722                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 723                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 724                                "entry to vlan_id=%d", sta->vlan_id);
 725         }
 726         return ret;
 727 #else /* CONFIG_NO_VLAN */
 728         return 0;
 729 #endif /* CONFIG_NO_VLAN */
 730 }
 731
 732
 733 #ifdef CONFIG_IEEE80211W
 734
 735 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 736 {
 737         u32 tu;
 738         struct os_time now, passed;
 739         os_get_time(&now);
 740         os_time_sub(&now, &sta->sa_query_start, &passed);
 741         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 742         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 743                 hostapd_logger(hapd, sta->addr,
 744                                HOSTAPD_MODULE_IEEE80211,
 745                                HOSTAPD_LEVEL_DEBUG,
 746                                "association SA Query timed out");
 747                 sta->sa_query_timed_out = 1;
 748                 os_free(sta->sa_query_trans_id);
 749                 sta->sa_query_trans_id = NULL;
 750                 sta->sa_query_count = 0;
 751                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 752                 return 1;
 753         }
 754
 755         return 0;
 756 }
 757
 758
 759 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 760 {
 761         struct hostapd_data *hapd = eloop_ctx;
 762         struct sta_info *sta = timeout_ctx;
 763         unsigned int timeout, sec, usec;
 764         u8 *trans_id, *nbuf;
 765
 766         if (sta->sa_query_count > 0 &&
 767             ap_check_sa_query_timeout(hapd, sta))
 768                 return;
 769
 770         nbuf = os_realloc(sta->sa_query_trans_id,
 771                           (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
 772         if (nbuf == NULL)
 773                 return;
 774         if (sta->sa_query_count == 0) {
 775                 /* Starting a new SA Query procedure */
 776                 os_get_time(&sta->sa_query_start);
 777         }
 778         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 779         sta->sa_query_trans_id = nbuf;
 780         sta->sa_query_count++;
 781
 782         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 783
 784         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 785         sec = ((timeout / 1000) * 1024) / 1000;
 786         usec = (timeout % 1000) * 1024;
 787         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 788
 789         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 790                        HOSTAPD_LEVEL_DEBUG,
 791                        "association SA Query attempt %d", sta->sa_query_count);
 792
 793 #ifdef NEED_AP_MLME
 794         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 795 #endif /* NEED_AP_MLME */
 796 }
 797
 798
 799 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 800 {
 801         ap_sa_query_timer(hapd, sta);
 802 }
 803
 804
 805 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 806 {
 807         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 808         os_free(sta->sa_query_trans_id);
 809         sta->sa_query_trans_id = NULL;
 810         sta->sa_query_count = 0;
 811 }
 812
 813 #endif /* CONFIG_IEEE80211W */
 814
 815
 816 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 817                            int authorized)
 818 {
 819         const u8 *dev_addr = NULL;
 820         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 821                 return;
 822
 823 #ifdef CONFIG_P2P
 824         dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 825 #endif /* CONFIG_P2P */
 826
 827         if (authorized) {
 828                 if (dev_addr)
 829                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED
 830                                 MACSTR " p2p_dev_addr=" MACSTR,
 831                                 MAC2STR(sta->addr), MAC2STR(dev_addr));
 832                 else
 833                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED
 834                                 MACSTR, MAC2STR(sta->addr));
 835                 if (hapd->msg_ctx_parent &&
 836                     hapd->msg_ctx_parent != hapd->msg_ctx && dev_addr)
 837                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 838                                 AP_STA_CONNECTED MACSTR " p2p_dev_addr="
 839                                 MACSTR,
 840                                 MAC2STR(sta->addr), MAC2STR(dev_addr));
 841                 else if (hapd->msg_ctx_parent &&
 842                          hapd->msg_ctx_parent != hapd->msg_ctx)
 843                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 844                                 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
 845
 846                 sta->flags |= WLAN_STA_AUTHORIZED;
 847         } else {
 848                 if (dev_addr)
 849                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED
 850                                 MACSTR " p2p_dev_addr=" MACSTR,
 851                                 MAC2STR(sta->addr), MAC2STR(dev_addr));
 852                 else
 853                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED
 854                                 MACSTR, MAC2STR(sta->addr));
 855                 if (hapd->msg_ctx_parent &&
 856                     hapd->msg_ctx_parent != hapd->msg_ctx && dev_addr)
 857                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 858                                 AP_STA_DISCONNECTED MACSTR " p2p_dev_addr="
 859                                 MACSTR, MAC2STR(sta->addr), MAC2STR(dev_addr));
 860                 else if (hapd->msg_ctx_parent &&
 861                          hapd->msg_ctx_parent != hapd->msg_ctx)
 862                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 863                                 AP_STA_DISCONNECTED MACSTR,
 864                                 MAC2STR(sta->addr));
 865                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 866         }
 867
 868         if (hapd->sta_authorized_cb)
 869                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 870                                         sta->addr, authorized, dev_addr);
 871 }
 872
 873
 874 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 875                        const u8 *addr, u16 reason)
 876 {
 877
 878         if (sta == NULL && addr)
 879                 sta = ap_get_sta(hapd, addr);
 880
 881         if (addr)
 882                 hostapd_drv_sta_deauth(hapd, addr, reason);
 883
 884         if (sta == NULL)
 885                 return;
 886         ap_sta_set_authorized(hapd, sta, 0);
 887         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
 888         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 889         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 890         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 891         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 892                                ap_handle_timer, hapd, sta);
 893         sta->timeout_next = STA_REMOVE;
 894
 895         sta->deauth_reason = reason;
 896         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 897         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 898         eloop_register_timeout(hapd->iface->drv_flags &
 899                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 900                                ap_sta_deauth_cb_timeout, hapd, sta);
 901 }
 902
 903
 904 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
 905 {
 906         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
 907                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
 908                 return;
 909         }
 910         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
 911         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 912         ap_sta_deauth_cb_timeout(hapd, sta);
 913 }
 914
 915
 916 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
 917 {
 918         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
 919                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
 920                 return;
 921         }
 922         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
 923         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 924         ap_sta_disassoc_cb_timeout(hapd, sta);
 925 }