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         wpa_printf(MSG_DEBUG, "%s: cancel ap_handle_timer for " MACSTR,
 199                    __func__, MAC2STR(sta->addr));
 200         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 201         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 202         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 203         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 204
 205         ieee802_1x_free_station(sta);
 206         wpa_auth_sta_deinit(sta->wpa_sm);
 207         rsn_preauth_free_station(hapd, sta);
 208 #ifndef CONFIG_NO_RADIUS
 209         radius_client_flush_auth(hapd->radius, sta->addr);
 210 #endif /* CONFIG_NO_RADIUS */
 211
 212         os_free(sta->last_assoc_req);
 213         os_free(sta->challenge);
 214
 215 #ifdef CONFIG_IEEE80211W
 216         os_free(sta->sa_query_trans_id);
 217         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 218 #endif /* CONFIG_IEEE80211W */
 219
 220 #ifdef CONFIG_P2P
 221         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 222 #endif /* CONFIG_P2P */
 223
 224 #ifdef CONFIG_INTERWORKING
 225         if (sta->gas_dialog) {
 226                 int i;
 227                 for (i = 0; i < GAS_DIALOG_MAX; i++)
 228                         gas_serv_dialog_clear(&sta->gas_dialog[i]);
 229                 os_free(sta->gas_dialog);
 230         }
 231 #endif /* CONFIG_INTERWORKING */
 232
 233         wpabuf_free(sta->wps_ie);
 234         wpabuf_free(sta->p2p_ie);
 235         wpabuf_free(sta->hs20_ie);
 236
 237         os_free(sta->ht_capabilities);
 238         while (sta->psk) {
 239                 struct hostapd_sta_wpa_psk_short *prev = sta->psk;
 240                 sta->psk = sta->psk->next;
 241                 os_free(prev);
 242         }
 243         os_free(sta->identity);
 244         os_free(sta->radius_cui);
 245
 246         os_free(sta);
 247 }
 248
 249
 250 void hostapd_free_stas(struct hostapd_data *hapd)
 251 {
 252         struct sta_info *sta, *prev;
 253
 254         sta = hapd->sta_list;
 255
 256         while (sta) {
 257                 prev = sta;
 258                 if (sta->flags & WLAN_STA_AUTH) {
 259                         mlme_deauthenticate_indication(
 260                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 261                 }
 262                 sta = sta->next;
 263                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 264                            MAC2STR(prev->addr));
 265                 ap_free_sta(hapd, prev);
 266         }
 267 }
 268
 269
 270 /**
 271  * ap_handle_timer - Per STA timer handler
 272  * @eloop_ctx: struct hostapd_data *
 273  * @timeout_ctx: struct sta_info *
 274  *
 275  * This function is called to check station activity and to remove inactive
 276  * stations.
 277  */
 278 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 279 {
 280         struct hostapd_data *hapd = eloop_ctx;
 281         struct sta_info *sta = timeout_ctx;
 282         unsigned long next_time = 0;
 283
 284         wpa_printf(MSG_DEBUG, "%s: " MACSTR " flags=0x%x timeout_next=%d",
 285                    __func__, MAC2STR(sta->addr), sta->flags,
 286                    sta->timeout_next);
 287         if (sta->timeout_next == STA_REMOVE) {
 288                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 289                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 290                                "local deauth request");
 291                 ap_free_sta(hapd, sta);
 292                 return;
 293         }
 294
 295         if ((sta->flags & WLAN_STA_ASSOC) &&
 296             (sta->timeout_next == STA_NULLFUNC ||
 297              sta->timeout_next == STA_DISASSOC)) {
 298                 int inactive_sec;
 299                 /*
 300                  * Add random value to timeout so that we don't end up bouncing
 301                  * all stations at the same time if we have lots of associated
 302                  * stations that are idle (but keep re-associating).
 303                  */
 304                 int fuzz = os_random() % 20;
 305                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 306                 if (inactive_sec == -1) {
 307                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 308                                 "Check inactivity: Could not "
 309                                 "get station info from kernel driver for "
 310                                 MACSTR, MAC2STR(sta->addr));
 311                         /*
 312                          * The driver may not support this functionality.
 313                          * Anyway, try again after the next inactivity timeout,
 314                          * but do not disconnect the station now.
 315                          */
 316                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 317                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 318                            sta->flags & WLAN_STA_ASSOC) {
 319                         /* station activity detected; reset timeout state */
 320                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 321                                 "Station " MACSTR " has been active %is ago",
 322                                 MAC2STR(sta->addr), inactive_sec);
 323                         sta->timeout_next = STA_NULLFUNC;
 324                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 325                                 inactive_sec;
 326                 } else {
 327                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 328                                 "Station " MACSTR " has been "
 329                                 "inactive too long: %d sec, max allowed: %d",
 330                                 MAC2STR(sta->addr), inactive_sec,
 331                                 hapd->conf->ap_max_inactivity);
 332
 333                         if (hapd->conf->skip_inactivity_poll)
 334                                 sta->timeout_next = STA_DISASSOC;
 335                 }
 336         }
 337
 338         if ((sta->flags & WLAN_STA_ASSOC) &&
 339             sta->timeout_next == STA_DISASSOC &&
 340             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 341             !hapd->conf->skip_inactivity_poll) {
 342                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 343                         " has ACKed data poll", MAC2STR(sta->addr));
 344                 /* data nullfunc frame poll did not produce TX errors; assume
 345                  * station ACKed it */
 346                 sta->timeout_next = STA_NULLFUNC;
 347                 next_time = hapd->conf->ap_max_inactivity;
 348         }
 349
 350         if (next_time) {
 351                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 352                            "for " MACSTR " (%lu seconds)",
 353                            __func__, MAC2STR(sta->addr), next_time);
 354                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 355                                        sta);
 356                 return;
 357         }
 358
 359         if (sta->timeout_next == STA_NULLFUNC &&
 360             (sta->flags & WLAN_STA_ASSOC)) {
 361                 wpa_printf(MSG_DEBUG, "  Polling STA");
 362                 sta->flags |= WLAN_STA_PENDING_POLL;
 363                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 364                                         sta->flags & WLAN_STA_WMM);
 365         } else if (sta->timeout_next != STA_REMOVE) {
 366                 int deauth = sta->timeout_next == STA_DEAUTH;
 367
 368                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 369                         "Timeout, sending %s info to STA " MACSTR,
 370                         deauth ? "deauthentication" : "disassociation",
 371                         MAC2STR(sta->addr));
 372
 373                 if (deauth) {
 374                         hostapd_drv_sta_deauth(
 375                                 hapd, sta->addr,
 376                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 377                 } else {
 378                         hostapd_drv_sta_disassoc(
 379                                 hapd, sta->addr,
 380                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 381                 }
 382         }
 383
 384         switch (sta->timeout_next) {
 385         case STA_NULLFUNC:
 386                 sta->timeout_next = STA_DISASSOC;
 387                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 388                            "for " MACSTR " (%d seconds - AP_DISASSOC_DELAY)",
 389                            __func__, MAC2STR(sta->addr), AP_DISASSOC_DELAY);
 390                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 391                                        hapd, sta);
 392                 break;
 393         case STA_DISASSOC:
 394                 ap_sta_set_authorized(hapd, sta, 0);
 395                 sta->flags &= ~WLAN_STA_ASSOC;
 396                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 397                 if (!sta->acct_terminate_cause)
 398                         sta->acct_terminate_cause =
 399                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 400                 accounting_sta_stop(hapd, sta);
 401                 ieee802_1x_free_station(sta);
 402                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 403                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 404                                "inactivity");
 405                 sta->timeout_next = STA_DEAUTH;
 406                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 407                            "for " MACSTR " (%d seconds - AP_DEAUTH_DELAY)",
 408                            __func__, MAC2STR(sta->addr), AP_DEAUTH_DELAY);
 409                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 410                                        hapd, sta);
 411                 mlme_disassociate_indication(
 412                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 413                 break;
 414         case STA_DEAUTH:
 415         case STA_REMOVE:
 416                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 417                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 418                                "inactivity (timer DEAUTH/REMOVE)");
 419                 if (!sta->acct_terminate_cause)
 420                         sta->acct_terminate_cause =
 421                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 422                 mlme_deauthenticate_indication(
 423                         hapd, sta,
 424                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 425                 ap_free_sta(hapd, sta);
 426                 break;
 427         }
 428 }
 429
 430
 431 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 432 {
 433         struct hostapd_data *hapd = eloop_ctx;
 434         struct sta_info *sta = timeout_ctx;
 435         u8 addr[ETH_ALEN];
 436
 437         if (!(sta->flags & WLAN_STA_AUTH)) {
 438                 if (sta->flags & WLAN_STA_GAS) {
 439                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 440                                    "entry " MACSTR, MAC2STR(sta->addr));
 441                         ap_free_sta(hapd, sta);
 442                 }
 443                 return;
 444         }
 445
 446         mlme_deauthenticate_indication(hapd, sta,
 447                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 448         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 449                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 450                        "session timeout");
 451         sta->acct_terminate_cause =
 452                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 453         os_memcpy(addr, sta->addr, ETH_ALEN);
 454         ap_free_sta(hapd, sta);
 455         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 456 }
 457
 458
 459 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 460                             u32 session_timeout)
 461 {
 462         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 463                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 464                        "seconds", session_timeout);
 465         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 466         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 467                                hapd, sta);
 468 }
 469
 470
 471 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 472 {
 473         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 474 }
 475
 476
 477 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 478 {
 479         struct sta_info *sta;
 480
 481         sta = ap_get_sta(hapd, addr);
 482         if (sta)
 483                 return sta;
 484
 485         wpa_printf(MSG_DEBUG, "  New STA");
 486         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 487                 /* FIX: might try to remove some old STAs first? */
 488                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 489                            hapd->num_sta, hapd->conf->max_num_sta);
 490                 return NULL;
 491         }
 492
 493         sta = os_zalloc(sizeof(struct sta_info));
 494         if (sta == NULL) {
 495                 wpa_printf(MSG_ERROR, "malloc failed");
 496                 return NULL;
 497         }
 498         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 499
 500         /* initialize STA info data */
 501         wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 502                    "for " MACSTR " (%d seconds - ap_max_inactivity)",
 503                    __func__, MAC2STR(addr),
 504                    hapd->conf->ap_max_inactivity);
 505         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 506                                ap_handle_timer, hapd, sta);
 507         os_memcpy(sta->addr, addr, ETH_ALEN);
 508         sta->next = hapd->sta_list;
 509         hapd->sta_list = sta;
 510         hapd->num_sta++;
 511         ap_sta_hash_add(hapd, sta);
 512         sta->ssid = &hapd->conf->ssid;
 513         ap_sta_remove_in_other_bss(hapd, sta);
 514
 515         return sta;
 516 }
 517
 518
 519 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 520 {
 521         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 522
 523         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 524                    MAC2STR(sta->addr));
 525         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 526             sta->flags & WLAN_STA_ASSOC) {
 527                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 528                            " from kernel driver.", MAC2STR(sta->addr));
 529                 return -1;
 530         }
 531         return 0;
 532 }
 533
 534
 535 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 536                                        struct sta_info *sta)
 537 {
 538         struct hostapd_iface *iface = hapd->iface;
 539         size_t i;
 540
 541         for (i = 0; i < iface->num_bss; i++) {
 542                 struct hostapd_data *bss = iface->bss[i];
 543                 struct sta_info *sta2;
 544                 /* bss should always be set during operation, but it may be
 545                  * NULL during reconfiguration. Assume the STA is not
 546                  * associated to another BSS in that case to avoid NULL pointer
 547                  * dereferences. */
 548                 if (bss == hapd || bss == NULL)
 549                         continue;
 550                 sta2 = ap_get_sta(bss, sta->addr);
 551                 if (!sta2)
 552                         continue;
 553
 554                 ap_sta_disconnect(bss, sta2, sta2->addr,
 555                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 556         }
 557 }
 558
 559
 560 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 561 {
 562         struct hostapd_data *hapd = eloop_ctx;
 563         struct sta_info *sta = timeout_ctx;
 564
 565         ap_sta_remove(hapd, sta);
 566         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 567 }
 568
 569
 570 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 571                          u16 reason)
 572 {
 573         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 574                    hapd->conf->iface, MAC2STR(sta->addr));
 575         sta->flags &= ~WLAN_STA_ASSOC;
 576         ap_sta_set_authorized(hapd, sta, 0);
 577         sta->timeout_next = STA_DEAUTH;
 578         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 579                    "for " MACSTR " (%d seconds - "
 580                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 581                    __func__, MAC2STR(sta->addr),
 582                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 583         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 584         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 585                                ap_handle_timer, hapd, sta);
 586         accounting_sta_stop(hapd, sta);
 587         ieee802_1x_free_station(sta);
 588
 589         sta->disassoc_reason = reason;
 590         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 591         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 592         eloop_register_timeout(hapd->iface->drv_flags &
 593                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 594                                ap_sta_disassoc_cb_timeout, hapd, sta);
 595 }
 596
 597
 598 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 599 {
 600         struct hostapd_data *hapd = eloop_ctx;
 601         struct sta_info *sta = timeout_ctx;
 602
 603         ap_sta_remove(hapd, sta);
 604         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 605 }
 606
 607
 608 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 609                            u16 reason)
 610 {
 611         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 612                    hapd->conf->iface, MAC2STR(sta->addr));
 613         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 614         ap_sta_set_authorized(hapd, sta, 0);
 615         sta->timeout_next = STA_REMOVE;
 616         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 617                    "for " MACSTR " (%d seconds - "
 618                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 619                    __func__, MAC2STR(sta->addr),
 620                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 621         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 622         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 623                                ap_handle_timer, hapd, sta);
 624         accounting_sta_stop(hapd, sta);
 625         ieee802_1x_free_station(sta);
 626
 627         sta->deauth_reason = reason;
 628         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 629         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 630         eloop_register_timeout(hapd->iface->drv_flags &
 631                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 632                                ap_sta_deauth_cb_timeout, hapd, sta);
 633 }
 634
 635
 636 #ifdef CONFIG_WPS
 637 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 638                       struct sta_info *sta, void *ctx)
 639 {
 640         if (sta && (sta->flags & WLAN_STA_WPS)) {
 641                 ap_sta_deauthenticate(hapd, sta,
 642                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 643                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 644                            __func__, MAC2STR(sta->addr));
 645                 return 1;
 646         }
 647
 648         return 0;
 649 }
 650 #endif /* CONFIG_WPS */
 651
 652
 653 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 654                      int old_vlanid)
 655 {
 656 #ifndef CONFIG_NO_VLAN
 657         const char *iface;
 658         struct hostapd_vlan *vlan = NULL;
 659         int ret;
 660
 661         /*
 662          * Do not proceed furthur if the vlan id remains same. We do not want
 663          * duplicate dynamic vlan entries.
 664          */
 665         if (sta->vlan_id == old_vlanid)
 666                 return 0;
 667
 668         /*
 669          * During 1x reauth, if the vlan id changes, then remove the old id and
 670          * proceed furthur to add the new one.
 671          */
 672         if (old_vlanid > 0)
 673                 vlan_remove_dynamic(hapd, old_vlanid);
 674
 675         iface = hapd->conf->iface;
 676         if (sta->ssid->vlan[0])
 677                 iface = sta->ssid->vlan;
 678
 679         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 680                 sta->vlan_id = 0;
 681         else if (sta->vlan_id > 0) {
 682                 vlan = hapd->conf->vlan;
 683                 while (vlan) {
 684                         if (vlan->vlan_id == sta->vlan_id ||
 685                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 686                                 iface = vlan->ifname;
 687                                 break;
 688                         }
 689                         vlan = vlan->next;
 690                 }
 691         }
 692
 693         if (sta->vlan_id > 0 && vlan == NULL) {
 694                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 695                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 696                                "binding station to (vlan_id=%d)",
 697                                sta->vlan_id);
 698                 return -1;
 699         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 700                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 701                 if (vlan == NULL) {
 702                         hostapd_logger(hapd, sta->addr,
 703                                        HOSTAPD_MODULE_IEEE80211,
 704                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 705                                        "dynamic VLAN interface for vlan_id=%d",
 706                                        sta->vlan_id);
 707                         return -1;
 708                 }
 709
 710                 iface = vlan->ifname;
 711                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 712                         hostapd_logger(hapd, sta->addr,
 713                                        HOSTAPD_MODULE_IEEE80211,
 714                                        HOSTAPD_LEVEL_DEBUG, "could not "
 715                                        "configure encryption for dynamic VLAN "
 716                                        "interface for vlan_id=%d",
 717                                        sta->vlan_id);
 718                 }
 719
 720                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 721                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 722                                "interface '%s'", iface);
 723         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 724                 if (sta->vlan_id > 0) {
 725                         vlan->dynamic_vlan++;
 726                         hostapd_logger(hapd, sta->addr,
 727                                        HOSTAPD_MODULE_IEEE80211,
 728                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 729                                        "dynamic VLAN interface '%s'", iface);
 730                 }
 731
 732                 /*
 733                  * Update encryption configuration for statically generated
 734                  * VLAN interface. This is only used for static WEP
 735                  * configuration for the case where hostapd did not yet know
 736                  * which keys are to be used when the interface was added.
 737                  */
 738                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 739                         hostapd_logger(hapd, sta->addr,
 740                                        HOSTAPD_MODULE_IEEE80211,
 741                                        HOSTAPD_LEVEL_DEBUG, "could not "
 742                                        "configure encryption for VLAN "
 743                                        "interface for vlan_id=%d",
 744                                        sta->vlan_id);
 745                 }
 746         }
 747
 748         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 749                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 750                        "'%s'", iface);
 751
 752         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 753                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 754
 755         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 756         if (ret < 0) {
 757                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 758                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 759                                "entry to vlan_id=%d", sta->vlan_id);
 760         }
 761         return ret;
 762 #else /* CONFIG_NO_VLAN */
 763         return 0;
 764 #endif /* CONFIG_NO_VLAN */
 765 }
 766
 767
 768 #ifdef CONFIG_IEEE80211W
 769
 770 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 771 {
 772         u32 tu;
 773         struct os_time now, passed;
 774         os_get_time(&now);
 775         os_time_sub(&now, &sta->sa_query_start, &passed);
 776         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 777         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 778                 hostapd_logger(hapd, sta->addr,
 779                                HOSTAPD_MODULE_IEEE80211,
 780                                HOSTAPD_LEVEL_DEBUG,
 781                                "association SA Query timed out");
 782                 sta->sa_query_timed_out = 1;
 783                 os_free(sta->sa_query_trans_id);
 784                 sta->sa_query_trans_id = NULL;
 785                 sta->sa_query_count = 0;
 786                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 787                 return 1;
 788         }
 789
 790         return 0;
 791 }
 792
 793
 794 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 795 {
 796         struct hostapd_data *hapd = eloop_ctx;
 797         struct sta_info *sta = timeout_ctx;
 798         unsigned int timeout, sec, usec;
 799         u8 *trans_id, *nbuf;
 800
 801         if (sta->sa_query_count > 0 &&
 802             ap_check_sa_query_timeout(hapd, sta))
 803                 return;
 804
 805         nbuf = os_realloc_array(sta->sa_query_trans_id,
 806                                 sta->sa_query_count + 1,
 807                                 WLAN_SA_QUERY_TR_ID_LEN);
 808         if (nbuf == NULL)
 809                 return;
 810         if (sta->sa_query_count == 0) {
 811                 /* Starting a new SA Query procedure */
 812                 os_get_time(&sta->sa_query_start);
 813         }
 814         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 815         sta->sa_query_trans_id = nbuf;
 816         sta->sa_query_count++;
 817
 818         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 819
 820         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 821         sec = ((timeout / 1000) * 1024) / 1000;
 822         usec = (timeout % 1000) * 1024;
 823         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 824
 825         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 826                        HOSTAPD_LEVEL_DEBUG,
 827                        "association SA Query attempt %d", sta->sa_query_count);
 828
 829         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 830 }
 831
 832
 833 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 834 {
 835         ap_sa_query_timer(hapd, sta);
 836 }
 837
 838
 839 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 840 {
 841         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 842         os_free(sta->sa_query_trans_id);
 843         sta->sa_query_trans_id = NULL;
 844         sta->sa_query_count = 0;
 845 }
 846
 847 #endif /* CONFIG_IEEE80211W */
 848
 849
 850 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 851                            int authorized)
 852 {
 853         const u8 *dev_addr = NULL;
 854 #ifdef CONFIG_P2P
 855         u8 addr[ETH_ALEN];
 856 #endif /* CONFIG_P2P */
 857
 858         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 859                 return;
 860
 861 #ifdef CONFIG_P2P
 862         if (hapd->p2p_group == NULL) {
 863                 if (sta->p2p_ie != NULL &&
 864                     p2p_parse_dev_addr_in_p2p_ie(sta->p2p_ie, addr) == 0)
 865                         dev_addr = addr;
 866         } else
 867                 dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 868 #endif /* CONFIG_P2P */
 869
 870         if (authorized) {
 871                 if (dev_addr)
 872                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED
 873                                 MACSTR " p2p_dev_addr=" MACSTR,
 874                                 MAC2STR(sta->addr), MAC2STR(dev_addr));
 875                 else
 876                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED
 877                                 MACSTR, MAC2STR(sta->addr));
 878                 if (hapd->msg_ctx_parent &&
 879                     hapd->msg_ctx_parent != hapd->msg_ctx && dev_addr)
 880                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 881                                 AP_STA_CONNECTED MACSTR " p2p_dev_addr="
 882                                 MACSTR,
 883                                 MAC2STR(sta->addr), MAC2STR(dev_addr));
 884                 else if (hapd->msg_ctx_parent &&
 885                          hapd->msg_ctx_parent != hapd->msg_ctx)
 886                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 887                                 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
 888
 889                 sta->flags |= WLAN_STA_AUTHORIZED;
 890         } else {
 891                 if (dev_addr)
 892                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED
 893                                 MACSTR " p2p_dev_addr=" MACSTR,
 894                                 MAC2STR(sta->addr), MAC2STR(dev_addr));
 895                 else
 896                         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED
 897                                 MACSTR, MAC2STR(sta->addr));
 898                 if (hapd->msg_ctx_parent &&
 899                     hapd->msg_ctx_parent != hapd->msg_ctx && dev_addr)
 900                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 901                                 AP_STA_DISCONNECTED MACSTR " p2p_dev_addr="
 902                                 MACSTR, MAC2STR(sta->addr), MAC2STR(dev_addr));
 903                 else if (hapd->msg_ctx_parent &&
 904                          hapd->msg_ctx_parent != hapd->msg_ctx)
 905                         wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
 906                                 AP_STA_DISCONNECTED MACSTR,
 907                                 MAC2STR(sta->addr));
 908                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 909         }
 910
 911         if (hapd->sta_authorized_cb)
 912                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 913                                         sta->addr, authorized, dev_addr);
 914 }
 915
 916
 917 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 918                        const u8 *addr, u16 reason)
 919 {
 920
 921         if (sta == NULL && addr)
 922                 sta = ap_get_sta(hapd, addr);
 923
 924         if (addr)
 925                 hostapd_drv_sta_deauth(hapd, addr, reason);
 926
 927         if (sta == NULL)
 928                 return;
 929         ap_sta_set_authorized(hapd, sta, 0);
 930         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
 931         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 932         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 933         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 934                    "for " MACSTR " (%d seconds - "
 935                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 936                    __func__, MAC2STR(sta->addr),
 937                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 938         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 939         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 940                                ap_handle_timer, hapd, sta);
 941         sta->timeout_next = STA_REMOVE;
 942
 943         sta->deauth_reason = reason;
 944         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 945         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 946         eloop_register_timeout(hapd->iface->drv_flags &
 947                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 948                                ap_sta_deauth_cb_timeout, hapd, sta);
 949 }
 950
 951
 952 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
 953 {
 954         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
 955                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
 956                 return;
 957         }
 958         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
 959         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 960         ap_sta_deauth_cb_timeout(hapd, sta);
 961 }
 962
 963
 964 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
 965 {
 966         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
 967                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
 968                 return;
 969         }
 970         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
 971         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 972         ap_sta_disassoc_cb_timeout(hapd, sta);
 973 }