src/ap/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2013, 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 "common/sae.h"
  16 #include "radius/radius.h"
  17 #include "radius/radius_client.h"
  18 #include "drivers/driver.h"
  19 #include "p2p/p2p.h"
  20 #include "hostapd.h"
  21 #include "accounting.h"
  22 #include "ieee802_1x.h"
  23 #include "ieee802_11.h"
  24 #include "ieee802_11_auth.h"
  25 #include "wpa_auth.h"
  26 #include "preauth_auth.h"
  27 #include "ap_config.h"
  28 #include "beacon.h"
  29 #include "ap_mlme.h"
  30 #include "vlan_init.h"
  31 #include "p2p_hostapd.h"
  32 #include "ap_drv_ops.h"
  33 #include "gas_serv.h"
  34 #include "sta_info.h"
  35
  36 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
  37                                        struct sta_info *sta);
  38 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  39 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx);
  40 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx);
  41 #ifdef CONFIG_IEEE80211W
  42 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  43 #endif /* CONFIG_IEEE80211W */
  44 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta);
  45
  46 int ap_for_each_sta(struct hostapd_data *hapd,
  47                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  48                               void *ctx),
  49                     void *ctx)
  50 {
  51         struct sta_info *sta;
  52
  53         for (sta = hapd->sta_list; sta; sta = sta->next) {
  54                 if (cb(hapd, sta, ctx))
  55                         return 1;
  56         }
  57
  58         return 0;
  59 }
  60
  61
  62 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  63 {
  64         struct sta_info *s;
  65
  66         s = hapd->sta_hash[STA_HASH(sta)];
  67         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  68                 s = s->hnext;
  69         return s;
  70 }
  71
  72
  73 #ifdef CONFIG_P2P
  74 struct sta_info * ap_get_sta_p2p(struct hostapd_data *hapd, const u8 *addr)
  75 {
  76         struct sta_info *sta;
  77
  78         for (sta = hapd->sta_list; sta; sta = sta->next) {
  79                 const u8 *p2p_dev_addr;
  80
  81                 if (sta->p2p_ie == NULL)
  82                         continue;
  83
  84                 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
  85                 if (p2p_dev_addr == NULL)
  86                         continue;
  87
  88                 if (os_memcmp(p2p_dev_addr, addr, ETH_ALEN) == 0)
  89                         return sta;
  90         }
  91
  92         return NULL;
  93 }
  94 #endif /* CONFIG_P2P */
  95
  96
  97 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  98 {
  99         struct sta_info *tmp;
 100
 101         if (hapd->sta_list == sta) {
 102                 hapd->sta_list = sta->next;
 103                 return;
 104         }
 105
 106         tmp = hapd->sta_list;
 107         while (tmp != NULL && tmp->next != sta)
 108                 tmp = tmp->next;
 109         if (tmp == NULL) {
 110                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
 111                            "list.", MAC2STR(sta->addr));
 112         } else
 113                 tmp->next = sta->next;
 114 }
 115
 116
 117 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
 118 {
 119         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
 120         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
 121 }
 122
 123
 124 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
 125 {
 126         struct sta_info *s;
 127
 128         s = hapd->sta_hash[STA_HASH(sta->addr)];
 129         if (s == NULL) return;
 130         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 131                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 132                 return;
 133         }
 134
 135         while (s->hnext != NULL &&
 136                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 137                 s = s->hnext;
 138         if (s->hnext != NULL)
 139                 s->hnext = s->hnext->hnext;
 140         else
 141                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 142                            " from hash table", MAC2STR(sta->addr));
 143 }
 144
 145
 146 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 147 {
 148         int set_beacon = 0;
 149
 150         accounting_sta_stop(hapd, sta);
 151
 152         /* just in case */
 153         ap_sta_set_authorized(hapd, sta, 0);
 154
 155         if (sta->flags & WLAN_STA_WDS)
 156                 hostapd_set_wds_sta(hapd, NULL, sta->addr, sta->aid, 0);
 157
 158         if (!(sta->flags & WLAN_STA_PREAUTH))
 159                 hostapd_drv_sta_remove(hapd, sta->addr);
 160
 161         ap_sta_hash_del(hapd, sta);
 162         ap_sta_list_del(hapd, sta);
 163
 164         if (sta->aid > 0)
 165                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 166                         ~BIT((sta->aid - 1) % 32);
 167
 168         hapd->num_sta--;
 169         if (sta->nonerp_set) {
 170                 sta->nonerp_set = 0;
 171                 hapd->iface->num_sta_non_erp--;
 172                 if (hapd->iface->num_sta_non_erp == 0)
 173                         set_beacon++;
 174         }
 175
 176         if (sta->no_short_slot_time_set) {
 177                 sta->no_short_slot_time_set = 0;
 178                 hapd->iface->num_sta_no_short_slot_time--;
 179                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 180                     && hapd->iface->num_sta_no_short_slot_time == 0)
 181                         set_beacon++;
 182         }
 183
 184         if (sta->no_short_preamble_set) {
 185                 sta->no_short_preamble_set = 0;
 186                 hapd->iface->num_sta_no_short_preamble--;
 187                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 188                     && hapd->iface->num_sta_no_short_preamble == 0)
 189                         set_beacon++;
 190         }
 191
 192         if (sta->no_ht_gf_set) {
 193                 sta->no_ht_gf_set = 0;
 194                 hapd->iface->num_sta_ht_no_gf--;
 195         }
 196
 197         if (sta->no_ht_set) {
 198                 sta->no_ht_set = 0;
 199                 hapd->iface->num_sta_no_ht--;
 200         }
 201
 202         if (sta->ht_20mhz_set) {
 203                 sta->ht_20mhz_set = 0;
 204                 hapd->iface->num_sta_ht_20mhz--;
 205         }
 206
 207 #ifdef CONFIG_P2P
 208         if (sta->no_p2p_set) {
 209                 sta->no_p2p_set = 0;
 210                 hapd->num_sta_no_p2p--;
 211                 if (hapd->num_sta_no_p2p == 0)
 212                         hostapd_p2p_non_p2p_sta_disconnected(hapd);
 213         }
 214 #endif /* CONFIG_P2P */
 215
 216 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 217         if (hostapd_ht_operation_update(hapd->iface) > 0)
 218                 set_beacon++;
 219 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 220
 221         if (set_beacon)
 222                 ieee802_11_set_beacons(hapd->iface);
 223
 224         wpa_printf(MSG_DEBUG, "%s: cancel ap_handle_timer for " MACSTR,
 225                    __func__, MAC2STR(sta->addr));
 226         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 227         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 228         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 229         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 230
 231         ieee802_1x_free_station(sta);
 232         wpa_auth_sta_deinit(sta->wpa_sm);
 233         rsn_preauth_free_station(hapd, sta);
 234 #ifndef CONFIG_NO_RADIUS
 235         radius_client_flush_auth(hapd->radius, sta->addr);
 236 #endif /* CONFIG_NO_RADIUS */
 237
 238         os_free(sta->last_assoc_req);
 239         os_free(sta->challenge);
 240
 241 #ifdef CONFIG_IEEE80211W
 242         os_free(sta->sa_query_trans_id);
 243         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 244 #endif /* CONFIG_IEEE80211W */
 245
 246 #ifdef CONFIG_P2P
 247         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 248 #endif /* CONFIG_P2P */
 249
 250 #ifdef CONFIG_INTERWORKING
 251         if (sta->gas_dialog) {
 252                 int i;
 253                 for (i = 0; i < GAS_DIALOG_MAX; i++)
 254                         gas_serv_dialog_clear(&sta->gas_dialog[i]);
 255                 os_free(sta->gas_dialog);
 256         }
 257 #endif /* CONFIG_INTERWORKING */
 258
 259         wpabuf_free(sta->wps_ie);
 260         wpabuf_free(sta->p2p_ie);
 261         wpabuf_free(sta->hs20_ie);
 262
 263         os_free(sta->ht_capabilities);
 264         hostapd_free_psk_list(sta->psk);
 265         os_free(sta->identity);
 266         os_free(sta->radius_cui);
 267
 268 #ifdef CONFIG_SAE
 269         sae_clear_data(sta->sae);
 270         os_free(sta->sae);
 271 #endif /* CONFIG_SAE */
 272
 273         os_free(sta);
 274 }
 275
 276
 277 void hostapd_free_stas(struct hostapd_data *hapd)
 278 {
 279         struct sta_info *sta, *prev;
 280
 281         sta = hapd->sta_list;
 282
 283         while (sta) {
 284                 prev = sta;
 285                 if (sta->flags & WLAN_STA_AUTH) {
 286                         mlme_deauthenticate_indication(
 287                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 288                 }
 289                 sta = sta->next;
 290                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 291                            MAC2STR(prev->addr));
 292                 ap_free_sta(hapd, prev);
 293         }
 294 }
 295
 296
 297 /**
 298  * ap_handle_timer - Per STA timer handler
 299  * @eloop_ctx: struct hostapd_data *
 300  * @timeout_ctx: struct sta_info *
 301  *
 302  * This function is called to check station activity and to remove inactive
 303  * stations.
 304  */
 305 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 306 {
 307         struct hostapd_data *hapd = eloop_ctx;
 308         struct sta_info *sta = timeout_ctx;
 309         unsigned long next_time = 0;
 310         int reason;
 311
 312         wpa_printf(MSG_DEBUG, "%s: " MACSTR " flags=0x%x timeout_next=%d",
 313                    __func__, MAC2STR(sta->addr), sta->flags,
 314                    sta->timeout_next);
 315         if (sta->timeout_next == STA_REMOVE) {
 316                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 317                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 318                                "local deauth request");
 319                 ap_free_sta(hapd, sta);
 320                 return;
 321         }
 322
 323         if ((sta->flags & WLAN_STA_ASSOC) &&
 324             (sta->timeout_next == STA_NULLFUNC ||
 325              sta->timeout_next == STA_DISASSOC)) {
 326                 int inactive_sec;
 327                 /*
 328                  * Add random value to timeout so that we don't end up bouncing
 329                  * all stations at the same time if we have lots of associated
 330                  * stations that are idle (but keep re-associating).
 331                  */
 332                 int fuzz = os_random() % 20;
 333                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 334                 if (inactive_sec == -1) {
 335                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 336                                 "Check inactivity: Could not "
 337                                 "get station info from kernel driver for "
 338                                 MACSTR, MAC2STR(sta->addr));
 339                         /*
 340                          * The driver may not support this functionality.
 341                          * Anyway, try again after the next inactivity timeout,
 342                          * but do not disconnect the station now.
 343                          */
 344                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 345                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 346                            sta->flags & WLAN_STA_ASSOC) {
 347                         /* station activity detected; reset timeout state */
 348                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 349                                 "Station " MACSTR " has been active %is ago",
 350                                 MAC2STR(sta->addr), inactive_sec);
 351                         sta->timeout_next = STA_NULLFUNC;
 352                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 353                                 inactive_sec;
 354                 } else {
 355                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 356                                 "Station " MACSTR " has been "
 357                                 "inactive too long: %d sec, max allowed: %d",
 358                                 MAC2STR(sta->addr), inactive_sec,
 359                                 hapd->conf->ap_max_inactivity);
 360
 361                         if (hapd->conf->skip_inactivity_poll)
 362                                 sta->timeout_next = STA_DISASSOC;
 363                 }
 364         }
 365
 366         if ((sta->flags & WLAN_STA_ASSOC) &&
 367             sta->timeout_next == STA_DISASSOC &&
 368             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 369             !hapd->conf->skip_inactivity_poll) {
 370                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 371                         " has ACKed data poll", MAC2STR(sta->addr));
 372                 /* data nullfunc frame poll did not produce TX errors; assume
 373                  * station ACKed it */
 374                 sta->timeout_next = STA_NULLFUNC;
 375                 next_time = hapd->conf->ap_max_inactivity;
 376         }
 377
 378         if (next_time) {
 379                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 380                            "for " MACSTR " (%lu seconds)",
 381                            __func__, MAC2STR(sta->addr), next_time);
 382                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 383                                        sta);
 384                 return;
 385         }
 386
 387         if (sta->timeout_next == STA_NULLFUNC &&
 388             (sta->flags & WLAN_STA_ASSOC)) {
 389                 wpa_printf(MSG_DEBUG, "  Polling STA");
 390                 sta->flags |= WLAN_STA_PENDING_POLL;
 391                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 392                                         sta->flags & WLAN_STA_WMM);
 393         } else if (sta->timeout_next != STA_REMOVE) {
 394                 int deauth = sta->timeout_next == STA_DEAUTH;
 395
 396                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 397                         "Timeout, sending %s info to STA " MACSTR,
 398                         deauth ? "deauthentication" : "disassociation",
 399                         MAC2STR(sta->addr));
 400
 401                 if (deauth) {
 402                         hostapd_drv_sta_deauth(
 403                                 hapd, sta->addr,
 404                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 405                 } else {
 406                         reason = (sta->timeout_next == STA_DISASSOC) ?
 407                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 408                                 WLAN_REASON_PREV_AUTH_NOT_VALID;
 409
 410                         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
 411                 }
 412         }
 413
 414         switch (sta->timeout_next) {
 415         case STA_NULLFUNC:
 416                 sta->timeout_next = STA_DISASSOC;
 417                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 418                            "for " MACSTR " (%d seconds - AP_DISASSOC_DELAY)",
 419                            __func__, MAC2STR(sta->addr), AP_DISASSOC_DELAY);
 420                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 421                                        hapd, sta);
 422                 break;
 423         case STA_DISASSOC:
 424         case STA_DISASSOC_FROM_CLI:
 425                 ap_sta_set_authorized(hapd, sta, 0);
 426                 sta->flags &= ~WLAN_STA_ASSOC;
 427                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 428                 if (!sta->acct_terminate_cause)
 429                         sta->acct_terminate_cause =
 430                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 431                 accounting_sta_stop(hapd, sta);
 432                 ieee802_1x_free_station(sta);
 433                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 434                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 435                                "inactivity");
 436                 reason = (sta->timeout_next == STA_DISASSOC) ?
 437                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 438                         WLAN_REASON_PREV_AUTH_NOT_VALID;
 439                 sta->timeout_next = STA_DEAUTH;
 440                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 441                            "for " MACSTR " (%d seconds - AP_DEAUTH_DELAY)",
 442                            __func__, MAC2STR(sta->addr), AP_DEAUTH_DELAY);
 443                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 444                                        hapd, sta);
 445                 mlme_disassociate_indication(hapd, sta, reason);
 446                 break;
 447         case STA_DEAUTH:
 448         case STA_REMOVE:
 449                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 450                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 451                                "inactivity (timer DEAUTH/REMOVE)");
 452                 if (!sta->acct_terminate_cause)
 453                         sta->acct_terminate_cause =
 454                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 455                 mlme_deauthenticate_indication(
 456                         hapd, sta,
 457                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 458                 ap_free_sta(hapd, sta);
 459                 break;
 460         }
 461 }
 462
 463
 464 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 465 {
 466         struct hostapd_data *hapd = eloop_ctx;
 467         struct sta_info *sta = timeout_ctx;
 468         u8 addr[ETH_ALEN];
 469
 470         if (!(sta->flags & WLAN_STA_AUTH)) {
 471                 if (sta->flags & WLAN_STA_GAS) {
 472                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 473                                    "entry " MACSTR, MAC2STR(sta->addr));
 474                         ap_free_sta(hapd, sta);
 475                 }
 476                 return;
 477         }
 478
 479         mlme_deauthenticate_indication(hapd, sta,
 480                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 481         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 482                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 483                        "session timeout");
 484         sta->acct_terminate_cause =
 485                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 486         os_memcpy(addr, sta->addr, ETH_ALEN);
 487         ap_free_sta(hapd, sta);
 488         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 489 }
 490
 491
 492 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 493                             u32 session_timeout)
 494 {
 495         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 496                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 497                        "seconds", session_timeout);
 498         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 499         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 500                                hapd, sta);
 501 }
 502
 503
 504 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 505 {
 506         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 507 }
 508
 509
 510 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 511 {
 512         struct sta_info *sta;
 513
 514         sta = ap_get_sta(hapd, addr);
 515         if (sta)
 516                 return sta;
 517
 518         wpa_printf(MSG_DEBUG, "  New STA");
 519         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 520                 /* FIX: might try to remove some old STAs first? */
 521                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 522                            hapd->num_sta, hapd->conf->max_num_sta);
 523                 return NULL;
 524         }
 525
 526         sta = os_zalloc(sizeof(struct sta_info));
 527         if (sta == NULL) {
 528                 wpa_printf(MSG_ERROR, "malloc failed");
 529                 return NULL;
 530         }
 531         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 532         accounting_sta_get_id(hapd, sta);
 533
 534         /* initialize STA info data */
 535         wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 536                    "for " MACSTR " (%d seconds - ap_max_inactivity)",
 537                    __func__, MAC2STR(addr),
 538                    hapd->conf->ap_max_inactivity);
 539         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 540                                ap_handle_timer, hapd, sta);
 541         os_memcpy(sta->addr, addr, ETH_ALEN);
 542         sta->next = hapd->sta_list;
 543         hapd->sta_list = sta;
 544         hapd->num_sta++;
 545         ap_sta_hash_add(hapd, sta);
 546         sta->ssid = &hapd->conf->ssid;
 547         ap_sta_remove_in_other_bss(hapd, sta);
 548
 549         return sta;
 550 }
 551
 552
 553 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 554 {
 555         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 556
 557         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 558                    MAC2STR(sta->addr));
 559         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 560             sta->flags & WLAN_STA_ASSOC) {
 561                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 562                            " from kernel driver.", MAC2STR(sta->addr));
 563                 return -1;
 564         }
 565         return 0;
 566 }
 567
 568
 569 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 570                                        struct sta_info *sta)
 571 {
 572         struct hostapd_iface *iface = hapd->iface;
 573         size_t i;
 574
 575         for (i = 0; i < iface->num_bss; i++) {
 576                 struct hostapd_data *bss = iface->bss[i];
 577                 struct sta_info *sta2;
 578                 /* bss should always be set during operation, but it may be
 579                  * NULL during reconfiguration. Assume the STA is not
 580                  * associated to another BSS in that case to avoid NULL pointer
 581                  * dereferences. */
 582                 if (bss == hapd || bss == NULL)
 583                         continue;
 584                 sta2 = ap_get_sta(bss, sta->addr);
 585                 if (!sta2)
 586                         continue;
 587
 588                 ap_sta_disconnect(bss, sta2, sta2->addr,
 589                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 590         }
 591 }
 592
 593
 594 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 595 {
 596         struct hostapd_data *hapd = eloop_ctx;
 597         struct sta_info *sta = timeout_ctx;
 598
 599         ap_sta_remove(hapd, sta);
 600         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 601 }
 602
 603
 604 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 605                          u16 reason)
 606 {
 607         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 608                    hapd->conf->iface, MAC2STR(sta->addr));
 609         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
 610         ap_sta_set_authorized(hapd, sta, 0);
 611         sta->timeout_next = STA_DEAUTH;
 612         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 613                    "for " MACSTR " (%d seconds - "
 614                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 615                    __func__, MAC2STR(sta->addr),
 616                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 617         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 618         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 619                                ap_handle_timer, hapd, sta);
 620         accounting_sta_stop(hapd, sta);
 621         ieee802_1x_free_station(sta);
 622
 623         sta->disassoc_reason = reason;
 624         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 625         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 626         eloop_register_timeout(hapd->iface->drv_flags &
 627                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 628                                ap_sta_disassoc_cb_timeout, hapd, sta);
 629 }
 630
 631
 632 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 633 {
 634         struct hostapd_data *hapd = eloop_ctx;
 635         struct sta_info *sta = timeout_ctx;
 636
 637         ap_sta_remove(hapd, sta);
 638         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 639 }
 640
 641
 642 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 643                            u16 reason)
 644 {
 645         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 646                    hapd->conf->iface, MAC2STR(sta->addr));
 647         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 648         ap_sta_set_authorized(hapd, sta, 0);
 649         sta->timeout_next = STA_REMOVE;
 650         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 651                    "for " MACSTR " (%d seconds - "
 652                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 653                    __func__, MAC2STR(sta->addr),
 654                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 655         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 656         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 657                                ap_handle_timer, hapd, sta);
 658         accounting_sta_stop(hapd, sta);
 659         ieee802_1x_free_station(sta);
 660
 661         sta->deauth_reason = reason;
 662         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 663         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 664         eloop_register_timeout(hapd->iface->drv_flags &
 665                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 666                                ap_sta_deauth_cb_timeout, hapd, sta);
 667 }
 668
 669
 670 #ifdef CONFIG_WPS
 671 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 672                       struct sta_info *sta, void *ctx)
 673 {
 674         if (sta && (sta->flags & WLAN_STA_WPS)) {
 675                 ap_sta_deauthenticate(hapd, sta,
 676                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 677                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 678                            __func__, MAC2STR(sta->addr));
 679                 return 1;
 680         }
 681
 682         return 0;
 683 }
 684 #endif /* CONFIG_WPS */
 685
 686
 687 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 688                      int old_vlanid)
 689 {
 690 #ifndef CONFIG_NO_VLAN
 691         const char *iface;
 692         struct hostapd_vlan *vlan = NULL;
 693         int ret;
 694
 695         /*
 696          * Do not proceed furthur if the vlan id remains same. We do not want
 697          * duplicate dynamic vlan entries.
 698          */
 699         if (sta->vlan_id == old_vlanid)
 700                 return 0;
 701
 702         /*
 703          * During 1x reauth, if the vlan id changes, then remove the old id and
 704          * proceed furthur to add the new one.
 705          */
 706         if (old_vlanid > 0)
 707                 vlan_remove_dynamic(hapd, old_vlanid);
 708
 709         iface = hapd->conf->iface;
 710         if (sta->ssid->vlan[0])
 711                 iface = sta->ssid->vlan;
 712
 713         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 714                 sta->vlan_id = 0;
 715         else if (sta->vlan_id > 0) {
 716                 struct hostapd_vlan *wildcard_vlan = NULL;
 717                 vlan = hapd->conf->vlan;
 718                 while (vlan) {
 719                         if (vlan->vlan_id == sta->vlan_id)
 720                                 break;
 721                         if (vlan->vlan_id == VLAN_ID_WILDCARD)
 722                                 wildcard_vlan = vlan;
 723                         vlan = vlan->next;
 724                 }
 725                 if (!vlan)
 726                         vlan = wildcard_vlan;
 727                 if (vlan)
 728                         iface = vlan->ifname;
 729         }
 730
 731         if (sta->vlan_id > 0 && vlan == NULL) {
 732                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 733                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 734                                "binding station to (vlan_id=%d)",
 735                                sta->vlan_id);
 736                 return -1;
 737         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 738                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 739                 if (vlan == NULL) {
 740                         hostapd_logger(hapd, sta->addr,
 741                                        HOSTAPD_MODULE_IEEE80211,
 742                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 743                                        "dynamic VLAN interface for vlan_id=%d",
 744                                        sta->vlan_id);
 745                         return -1;
 746                 }
 747
 748                 iface = vlan->ifname;
 749                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 750                         hostapd_logger(hapd, sta->addr,
 751                                        HOSTAPD_MODULE_IEEE80211,
 752                                        HOSTAPD_LEVEL_DEBUG, "could not "
 753                                        "configure encryption for dynamic VLAN "
 754                                        "interface for vlan_id=%d",
 755                                        sta->vlan_id);
 756                 }
 757
 758                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 759                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 760                                "interface '%s'", iface);
 761         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 762                 if (sta->vlan_id > 0) {
 763                         vlan->dynamic_vlan++;
 764                         hostapd_logger(hapd, sta->addr,
 765                                        HOSTAPD_MODULE_IEEE80211,
 766                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 767                                        "dynamic VLAN interface '%s'", iface);
 768                 }
 769
 770                 /*
 771                  * Update encryption configuration for statically generated
 772                  * VLAN interface. This is only used for static WEP
 773                  * configuration for the case where hostapd did not yet know
 774                  * which keys are to be used when the interface was added.
 775                  */
 776                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 777                         hostapd_logger(hapd, sta->addr,
 778                                        HOSTAPD_MODULE_IEEE80211,
 779                                        HOSTAPD_LEVEL_DEBUG, "could not "
 780                                        "configure encryption for VLAN "
 781                                        "interface for vlan_id=%d",
 782                                        sta->vlan_id);
 783                 }
 784         }
 785
 786         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 787                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 788                        "'%s'", iface);
 789
 790         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 791                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 792
 793         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 794         if (ret < 0) {
 795                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 796                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 797                                "entry to vlan_id=%d", sta->vlan_id);
 798         }
 799         return ret;
 800 #else /* CONFIG_NO_VLAN */
 801         return 0;
 802 #endif /* CONFIG_NO_VLAN */
 803 }
 804
 805
 806 #ifdef CONFIG_IEEE80211W
 807
 808 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 809 {
 810         u32 tu;
 811         struct os_time now, passed;
 812         os_get_time(&now);
 813         os_time_sub(&now, &sta->sa_query_start, &passed);
 814         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 815         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 816                 hostapd_logger(hapd, sta->addr,
 817                                HOSTAPD_MODULE_IEEE80211,
 818                                HOSTAPD_LEVEL_DEBUG,
 819                                "association SA Query timed out");
 820                 sta->sa_query_timed_out = 1;
 821                 os_free(sta->sa_query_trans_id);
 822                 sta->sa_query_trans_id = NULL;
 823                 sta->sa_query_count = 0;
 824                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 825                 return 1;
 826         }
 827
 828         return 0;
 829 }
 830
 831
 832 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 833 {
 834         struct hostapd_data *hapd = eloop_ctx;
 835         struct sta_info *sta = timeout_ctx;
 836         unsigned int timeout, sec, usec;
 837         u8 *trans_id, *nbuf;
 838
 839         if (sta->sa_query_count > 0 &&
 840             ap_check_sa_query_timeout(hapd, sta))
 841                 return;
 842
 843         nbuf = os_realloc_array(sta->sa_query_trans_id,
 844                                 sta->sa_query_count + 1,
 845                                 WLAN_SA_QUERY_TR_ID_LEN);
 846         if (nbuf == NULL)
 847                 return;
 848         if (sta->sa_query_count == 0) {
 849                 /* Starting a new SA Query procedure */
 850                 os_get_time(&sta->sa_query_start);
 851         }
 852         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 853         sta->sa_query_trans_id = nbuf;
 854         sta->sa_query_count++;
 855
 856         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 857
 858         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 859         sec = ((timeout / 1000) * 1024) / 1000;
 860         usec = (timeout % 1000) * 1024;
 861         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 862
 863         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 864                        HOSTAPD_LEVEL_DEBUG,
 865                        "association SA Query attempt %d", sta->sa_query_count);
 866
 867         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 868 }
 869
 870
 871 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 872 {
 873         ap_sa_query_timer(hapd, sta);
 874 }
 875
 876
 877 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 878 {
 879         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 880         os_free(sta->sa_query_trans_id);
 881         sta->sa_query_trans_id = NULL;
 882         sta->sa_query_count = 0;
 883 }
 884
 885 #endif /* CONFIG_IEEE80211W */
 886
 887
 888 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 889                            int authorized)
 890 {
 891         const u8 *dev_addr = NULL;
 892         char buf[100];
 893 #ifdef CONFIG_P2P
 894         u8 addr[ETH_ALEN];
 895 #endif /* CONFIG_P2P */
 896
 897         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 898                 return;
 899
 900 #ifdef CONFIG_P2P
 901         if (hapd->p2p_group == NULL) {
 902                 if (sta->p2p_ie != NULL &&
 903                     p2p_parse_dev_addr_in_p2p_ie(sta->p2p_ie, addr) == 0)
 904                         dev_addr = addr;
 905         } else
 906                 dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 907 #endif /* CONFIG_P2P */
 908
 909         if (dev_addr)
 910                 os_snprintf(buf, sizeof(buf), MACSTR " p2p_dev_addr=" MACSTR,
 911                             MAC2STR(sta->addr), MAC2STR(dev_addr));
 912         else
 913                 os_snprintf(buf, sizeof(buf), MACSTR, MAC2STR(sta->addr));
 914
 915         if (authorized) {
 916                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s", buf);
 917
 918                 if (hapd->msg_ctx_parent &&
 919                     hapd->msg_ctx_parent != hapd->msg_ctx)
 920                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 921                                           AP_STA_CONNECTED "%s", buf);
 922
 923                 sta->flags |= WLAN_STA_AUTHORIZED;
 924         } else {
 925                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED "%s", buf);
 926
 927                 if (hapd->msg_ctx_parent &&
 928                     hapd->msg_ctx_parent != hapd->msg_ctx)
 929                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 930                                           AP_STA_DISCONNECTED "%s", buf);
 931
 932                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 933         }
 934
 935         if (hapd->sta_authorized_cb)
 936                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 937                                         sta->addr, authorized, dev_addr);
 938 }
 939
 940
 941 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 942                        const u8 *addr, u16 reason)
 943 {
 944
 945         if (sta == NULL && addr)
 946                 sta = ap_get_sta(hapd, addr);
 947
 948         if (addr)
 949                 hostapd_drv_sta_deauth(hapd, addr, reason);
 950
 951         if (sta == NULL)
 952                 return;
 953         ap_sta_set_authorized(hapd, sta, 0);
 954         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
 955         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 956         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 957         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 958                    "for " MACSTR " (%d seconds - "
 959                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 960                    __func__, MAC2STR(sta->addr),
 961                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 962         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 963         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 964                                ap_handle_timer, hapd, sta);
 965         sta->timeout_next = STA_REMOVE;
 966
 967         sta->deauth_reason = reason;
 968         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 969         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 970         eloop_register_timeout(hapd->iface->drv_flags &
 971                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 972                                ap_sta_deauth_cb_timeout, hapd, sta);
 973 }
 974
 975
 976 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
 977 {
 978         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
 979                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
 980                 return;
 981         }
 982         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
 983         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 984         ap_sta_deauth_cb_timeout(hapd, sta);
 985 }
 986
 987
 988 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
 989 {
 990         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
 991                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
 992                 return;
 993         }
 994         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
 995         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 996         ap_sta_disassoc_cb_timeout(hapd, sta);
 997 }