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         if (hapd->radius)
 236                 radius_client_flush_auth(hapd->radius, sta->addr);
 237 #endif /* CONFIG_NO_RADIUS */
 238
 239         os_free(sta->last_assoc_req);
 240         os_free(sta->challenge);
 241
 242 #ifdef CONFIG_IEEE80211W
 243         os_free(sta->sa_query_trans_id);
 244         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 245 #endif /* CONFIG_IEEE80211W */
 246
 247 #ifdef CONFIG_P2P
 248         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 249 #endif /* CONFIG_P2P */
 250
 251 #ifdef CONFIG_INTERWORKING
 252         if (sta->gas_dialog) {
 253                 int i;
 254                 for (i = 0; i < GAS_DIALOG_MAX; i++)
 255                         gas_serv_dialog_clear(&sta->gas_dialog[i]);
 256                 os_free(sta->gas_dialog);
 257         }
 258 #endif /* CONFIG_INTERWORKING */
 259
 260         wpabuf_free(sta->wps_ie);
 261         wpabuf_free(sta->p2p_ie);
 262         wpabuf_free(sta->hs20_ie);
 263
 264         os_free(sta->ht_capabilities);
 265         hostapd_free_psk_list(sta->psk);
 266         os_free(sta->identity);
 267         os_free(sta->radius_cui);
 268
 269 #ifdef CONFIG_SAE
 270         sae_clear_data(sta->sae);
 271         os_free(sta->sae);
 272 #endif /* CONFIG_SAE */
 273
 274         os_free(sta);
 275 }
 276
 277
 278 void hostapd_free_stas(struct hostapd_data *hapd)
 279 {
 280         struct sta_info *sta, *prev;
 281
 282         sta = hapd->sta_list;
 283
 284         while (sta) {
 285                 prev = sta;
 286                 if (sta->flags & WLAN_STA_AUTH) {
 287                         mlme_deauthenticate_indication(
 288                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 289                 }
 290                 sta = sta->next;
 291                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 292                            MAC2STR(prev->addr));
 293                 ap_free_sta(hapd, prev);
 294         }
 295 }
 296
 297
 298 /**
 299  * ap_handle_timer - Per STA timer handler
 300  * @eloop_ctx: struct hostapd_data *
 301  * @timeout_ctx: struct sta_info *
 302  *
 303  * This function is called to check station activity and to remove inactive
 304  * stations.
 305  */
 306 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 307 {
 308         struct hostapd_data *hapd = eloop_ctx;
 309         struct sta_info *sta = timeout_ctx;
 310         unsigned long next_time = 0;
 311         int reason;
 312
 313         wpa_printf(MSG_DEBUG, "%s: " MACSTR " flags=0x%x timeout_next=%d",
 314                    __func__, MAC2STR(sta->addr), sta->flags,
 315                    sta->timeout_next);
 316         if (sta->timeout_next == STA_REMOVE) {
 317                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 318                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 319                                "local deauth request");
 320                 ap_free_sta(hapd, sta);
 321                 return;
 322         }
 323
 324         if ((sta->flags & WLAN_STA_ASSOC) &&
 325             (sta->timeout_next == STA_NULLFUNC ||
 326              sta->timeout_next == STA_DISASSOC)) {
 327                 int inactive_sec;
 328                 /*
 329                  * Add random value to timeout so that we don't end up bouncing
 330                  * all stations at the same time if we have lots of associated
 331                  * stations that are idle (but keep re-associating).
 332                  */
 333                 int fuzz = os_random() % 20;
 334                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 335                 if (inactive_sec == -1) {
 336                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 337                                 "Check inactivity: Could not "
 338                                 "get station info from kernel driver for "
 339                                 MACSTR, MAC2STR(sta->addr));
 340                         /*
 341                          * The driver may not support this functionality.
 342                          * Anyway, try again after the next inactivity timeout,
 343                          * but do not disconnect the station now.
 344                          */
 345                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 346                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 347                            sta->flags & WLAN_STA_ASSOC) {
 348                         /* station activity detected; reset timeout state */
 349                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 350                                 "Station " MACSTR " has been active %is ago",
 351                                 MAC2STR(sta->addr), inactive_sec);
 352                         sta->timeout_next = STA_NULLFUNC;
 353                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 354                                 inactive_sec;
 355                 } else {
 356                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 357                                 "Station " MACSTR " has been "
 358                                 "inactive too long: %d sec, max allowed: %d",
 359                                 MAC2STR(sta->addr), inactive_sec,
 360                                 hapd->conf->ap_max_inactivity);
 361
 362                         if (hapd->conf->skip_inactivity_poll)
 363                                 sta->timeout_next = STA_DISASSOC;
 364                 }
 365         }
 366
 367         if ((sta->flags & WLAN_STA_ASSOC) &&
 368             sta->timeout_next == STA_DISASSOC &&
 369             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 370             !hapd->conf->skip_inactivity_poll) {
 371                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 372                         " has ACKed data poll", MAC2STR(sta->addr));
 373                 /* data nullfunc frame poll did not produce TX errors; assume
 374                  * station ACKed it */
 375                 sta->timeout_next = STA_NULLFUNC;
 376                 next_time = hapd->conf->ap_max_inactivity;
 377         }
 378
 379         if (next_time) {
 380                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 381                            "for " MACSTR " (%lu seconds)",
 382                            __func__, MAC2STR(sta->addr), next_time);
 383                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 384                                        sta);
 385                 return;
 386         }
 387
 388         if (sta->timeout_next == STA_NULLFUNC &&
 389             (sta->flags & WLAN_STA_ASSOC)) {
 390                 wpa_printf(MSG_DEBUG, "  Polling STA");
 391                 sta->flags |= WLAN_STA_PENDING_POLL;
 392                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 393                                         sta->flags & WLAN_STA_WMM);
 394         } else if (sta->timeout_next != STA_REMOVE) {
 395                 int deauth = sta->timeout_next == STA_DEAUTH;
 396
 397                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 398                         "Timeout, sending %s info to STA " MACSTR,
 399                         deauth ? "deauthentication" : "disassociation",
 400                         MAC2STR(sta->addr));
 401
 402                 if (deauth) {
 403                         hostapd_drv_sta_deauth(
 404                                 hapd, sta->addr,
 405                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 406                 } else {
 407                         reason = (sta->timeout_next == STA_DISASSOC) ?
 408                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 409                                 WLAN_REASON_PREV_AUTH_NOT_VALID;
 410
 411                         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
 412                 }
 413         }
 414
 415         switch (sta->timeout_next) {
 416         case STA_NULLFUNC:
 417                 sta->timeout_next = STA_DISASSOC;
 418                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 419                            "for " MACSTR " (%d seconds - AP_DISASSOC_DELAY)",
 420                            __func__, MAC2STR(sta->addr), AP_DISASSOC_DELAY);
 421                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 422                                        hapd, sta);
 423                 break;
 424         case STA_DISASSOC:
 425         case STA_DISASSOC_FROM_CLI:
 426                 ap_sta_set_authorized(hapd, sta, 0);
 427                 sta->flags &= ~WLAN_STA_ASSOC;
 428                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 429                 if (!sta->acct_terminate_cause)
 430                         sta->acct_terminate_cause =
 431                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 432                 accounting_sta_stop(hapd, sta);
 433                 ieee802_1x_free_station(sta);
 434                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 435                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 436                                "inactivity");
 437                 reason = (sta->timeout_next == STA_DISASSOC) ?
 438                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 439                         WLAN_REASON_PREV_AUTH_NOT_VALID;
 440                 sta->timeout_next = STA_DEAUTH;
 441                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 442                            "for " MACSTR " (%d seconds - AP_DEAUTH_DELAY)",
 443                            __func__, MAC2STR(sta->addr), AP_DEAUTH_DELAY);
 444                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 445                                        hapd, sta);
 446                 mlme_disassociate_indication(hapd, sta, reason);
 447                 break;
 448         case STA_DEAUTH:
 449         case STA_REMOVE:
 450                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 451                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 452                                "inactivity (timer DEAUTH/REMOVE)");
 453                 if (!sta->acct_terminate_cause)
 454                         sta->acct_terminate_cause =
 455                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 456                 mlme_deauthenticate_indication(
 457                         hapd, sta,
 458                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 459                 ap_free_sta(hapd, sta);
 460                 break;
 461         }
 462 }
 463
 464
 465 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 466 {
 467         struct hostapd_data *hapd = eloop_ctx;
 468         struct sta_info *sta = timeout_ctx;
 469         u8 addr[ETH_ALEN];
 470
 471         if (!(sta->flags & WLAN_STA_AUTH)) {
 472                 if (sta->flags & WLAN_STA_GAS) {
 473                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 474                                    "entry " MACSTR, MAC2STR(sta->addr));
 475                         ap_free_sta(hapd, sta);
 476                 }
 477                 return;
 478         }
 479
 480         mlme_deauthenticate_indication(hapd, sta,
 481                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 482         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 483                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 484                        "session timeout");
 485         sta->acct_terminate_cause =
 486                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 487         os_memcpy(addr, sta->addr, ETH_ALEN);
 488         ap_free_sta(hapd, sta);
 489         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 490 }
 491
 492
 493 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 494                             u32 session_timeout)
 495 {
 496         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 497                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 498                        "seconds", session_timeout);
 499         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 500         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 501                                hapd, sta);
 502 }
 503
 504
 505 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 506 {
 507         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 508 }
 509
 510
 511 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 512 {
 513         struct sta_info *sta;
 514
 515         sta = ap_get_sta(hapd, addr);
 516         if (sta)
 517                 return sta;
 518
 519         wpa_printf(MSG_DEBUG, "  New STA");
 520         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 521                 /* FIX: might try to remove some old STAs first? */
 522                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 523                            hapd->num_sta, hapd->conf->max_num_sta);
 524                 return NULL;
 525         }
 526
 527         sta = os_zalloc(sizeof(struct sta_info));
 528         if (sta == NULL) {
 529                 wpa_printf(MSG_ERROR, "malloc failed");
 530                 return NULL;
 531         }
 532         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 533         accounting_sta_get_id(hapd, sta);
 534
 535         /* initialize STA info data */
 536         wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 537                    "for " MACSTR " (%d seconds - ap_max_inactivity)",
 538                    __func__, MAC2STR(addr),
 539                    hapd->conf->ap_max_inactivity);
 540         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 541                                ap_handle_timer, hapd, sta);
 542         os_memcpy(sta->addr, addr, ETH_ALEN);
 543         sta->next = hapd->sta_list;
 544         hapd->sta_list = sta;
 545         hapd->num_sta++;
 546         ap_sta_hash_add(hapd, sta);
 547         sta->ssid = &hapd->conf->ssid;
 548         ap_sta_remove_in_other_bss(hapd, sta);
 549
 550         return sta;
 551 }
 552
 553
 554 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 555 {
 556         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 557
 558         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 559                    MAC2STR(sta->addr));
 560         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 561             sta->flags & WLAN_STA_ASSOC) {
 562                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 563                            " from kernel driver.", MAC2STR(sta->addr));
 564                 return -1;
 565         }
 566         return 0;
 567 }
 568
 569
 570 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 571                                        struct sta_info *sta)
 572 {
 573         struct hostapd_iface *iface = hapd->iface;
 574         size_t i;
 575
 576         for (i = 0; i < iface->num_bss; i++) {
 577                 struct hostapd_data *bss = iface->bss[i];
 578                 struct sta_info *sta2;
 579                 /* bss should always be set during operation, but it may be
 580                  * NULL during reconfiguration. Assume the STA is not
 581                  * associated to another BSS in that case to avoid NULL pointer
 582                  * dereferences. */
 583                 if (bss == hapd || bss == NULL)
 584                         continue;
 585                 sta2 = ap_get_sta(bss, sta->addr);
 586                 if (!sta2)
 587                         continue;
 588
 589                 ap_sta_disconnect(bss, sta2, sta2->addr,
 590                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 591         }
 592 }
 593
 594
 595 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 596 {
 597         struct hostapd_data *hapd = eloop_ctx;
 598         struct sta_info *sta = timeout_ctx;
 599
 600         ap_sta_remove(hapd, sta);
 601         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 602 }
 603
 604
 605 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 606                          u16 reason)
 607 {
 608         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 609                    hapd->conf->iface, MAC2STR(sta->addr));
 610         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
 611         ap_sta_set_authorized(hapd, sta, 0);
 612         sta->timeout_next = STA_DEAUTH;
 613         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 614                    "for " MACSTR " (%d seconds - "
 615                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 616                    __func__, MAC2STR(sta->addr),
 617                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 618         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 619         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 620                                ap_handle_timer, hapd, sta);
 621         accounting_sta_stop(hapd, sta);
 622         ieee802_1x_free_station(sta);
 623
 624         sta->disassoc_reason = reason;
 625         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 626         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 627         eloop_register_timeout(hapd->iface->drv_flags &
 628                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 629                                ap_sta_disassoc_cb_timeout, hapd, sta);
 630 }
 631
 632
 633 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 634 {
 635         struct hostapd_data *hapd = eloop_ctx;
 636         struct sta_info *sta = timeout_ctx;
 637
 638         ap_sta_remove(hapd, sta);
 639         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 640 }
 641
 642
 643 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 644                            u16 reason)
 645 {
 646         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 647                    hapd->conf->iface, MAC2STR(sta->addr));
 648         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 649         ap_sta_set_authorized(hapd, sta, 0);
 650         sta->timeout_next = STA_REMOVE;
 651         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 652                    "for " MACSTR " (%d seconds - "
 653                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 654                    __func__, MAC2STR(sta->addr),
 655                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 656         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 657         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 658                                ap_handle_timer, hapd, sta);
 659         accounting_sta_stop(hapd, sta);
 660         ieee802_1x_free_station(sta);
 661
 662         sta->deauth_reason = reason;
 663         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 664         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 665         eloop_register_timeout(hapd->iface->drv_flags &
 666                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 667                                ap_sta_deauth_cb_timeout, hapd, sta);
 668 }
 669
 670
 671 #ifdef CONFIG_WPS
 672 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 673                       struct sta_info *sta, void *ctx)
 674 {
 675         if (sta && (sta->flags & WLAN_STA_WPS)) {
 676                 ap_sta_deauthenticate(hapd, sta,
 677                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 678                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 679                            __func__, MAC2STR(sta->addr));
 680                 return 1;
 681         }
 682
 683         return 0;
 684 }
 685 #endif /* CONFIG_WPS */
 686
 687
 688 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 689                      int old_vlanid)
 690 {
 691 #ifndef CONFIG_NO_VLAN
 692         const char *iface;
 693         struct hostapd_vlan *vlan = NULL;
 694         int ret;
 695
 696         /*
 697          * Do not proceed furthur if the vlan id remains same. We do not want
 698          * duplicate dynamic vlan entries.
 699          */
 700         if (sta->vlan_id == old_vlanid)
 701                 return 0;
 702
 703         /*
 704          * During 1x reauth, if the vlan id changes, then remove the old id and
 705          * proceed furthur to add the new one.
 706          */
 707         if (old_vlanid > 0)
 708                 vlan_remove_dynamic(hapd, old_vlanid);
 709
 710         iface = hapd->conf->iface;
 711         if (sta->ssid->vlan[0])
 712                 iface = sta->ssid->vlan;
 713
 714         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 715                 sta->vlan_id = 0;
 716         else if (sta->vlan_id > 0) {
 717                 struct hostapd_vlan *wildcard_vlan = NULL;
 718                 vlan = hapd->conf->vlan;
 719                 while (vlan) {
 720                         if (vlan->vlan_id == sta->vlan_id)
 721                                 break;
 722                         if (vlan->vlan_id == VLAN_ID_WILDCARD)
 723                                 wildcard_vlan = vlan;
 724                         vlan = vlan->next;
 725                 }
 726                 if (!vlan)
 727                         vlan = wildcard_vlan;
 728                 if (vlan)
 729                         iface = vlan->ifname;
 730         }
 731
 732         if (sta->vlan_id > 0 && vlan == NULL) {
 733                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 734                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 735                                "binding station to (vlan_id=%d)",
 736                                sta->vlan_id);
 737                 return -1;
 738         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 739                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 740                 if (vlan == NULL) {
 741                         hostapd_logger(hapd, sta->addr,
 742                                        HOSTAPD_MODULE_IEEE80211,
 743                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 744                                        "dynamic VLAN interface for vlan_id=%d",
 745                                        sta->vlan_id);
 746                         return -1;
 747                 }
 748
 749                 iface = vlan->ifname;
 750                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 751                         hostapd_logger(hapd, sta->addr,
 752                                        HOSTAPD_MODULE_IEEE80211,
 753                                        HOSTAPD_LEVEL_DEBUG, "could not "
 754                                        "configure encryption for dynamic VLAN "
 755                                        "interface for vlan_id=%d",
 756                                        sta->vlan_id);
 757                 }
 758
 759                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 760                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 761                                "interface '%s'", iface);
 762         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 763                 if (sta->vlan_id > 0) {
 764                         vlan->dynamic_vlan++;
 765                         hostapd_logger(hapd, sta->addr,
 766                                        HOSTAPD_MODULE_IEEE80211,
 767                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 768                                        "dynamic VLAN interface '%s'", iface);
 769                 }
 770
 771                 /*
 772                  * Update encryption configuration for statically generated
 773                  * VLAN interface. This is only used for static WEP
 774                  * configuration for the case where hostapd did not yet know
 775                  * which keys are to be used when the interface was added.
 776                  */
 777                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 778                         hostapd_logger(hapd, sta->addr,
 779                                        HOSTAPD_MODULE_IEEE80211,
 780                                        HOSTAPD_LEVEL_DEBUG, "could not "
 781                                        "configure encryption for VLAN "
 782                                        "interface for vlan_id=%d",
 783                                        sta->vlan_id);
 784                 }
 785         }
 786
 787         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 788                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 789                        "'%s'", iface);
 790
 791         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 792                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 793
 794         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 795         if (ret < 0) {
 796                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 797                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 798                                "entry to vlan_id=%d", sta->vlan_id);
 799         }
 800         return ret;
 801 #else /* CONFIG_NO_VLAN */
 802         return 0;
 803 #endif /* CONFIG_NO_VLAN */
 804 }
 805
 806
 807 #ifdef CONFIG_IEEE80211W
 808
 809 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 810 {
 811         u32 tu;
 812         struct os_time now, passed;
 813         os_get_time(&now);
 814         os_time_sub(&now, &sta->sa_query_start, &passed);
 815         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 816         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 817                 hostapd_logger(hapd, sta->addr,
 818                                HOSTAPD_MODULE_IEEE80211,
 819                                HOSTAPD_LEVEL_DEBUG,
 820                                "association SA Query timed out");
 821                 sta->sa_query_timed_out = 1;
 822                 os_free(sta->sa_query_trans_id);
 823                 sta->sa_query_trans_id = NULL;
 824                 sta->sa_query_count = 0;
 825                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 826                 return 1;
 827         }
 828
 829         return 0;
 830 }
 831
 832
 833 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 834 {
 835         struct hostapd_data *hapd = eloop_ctx;
 836         struct sta_info *sta = timeout_ctx;
 837         unsigned int timeout, sec, usec;
 838         u8 *trans_id, *nbuf;
 839
 840         if (sta->sa_query_count > 0 &&
 841             ap_check_sa_query_timeout(hapd, sta))
 842                 return;
 843
 844         nbuf = os_realloc_array(sta->sa_query_trans_id,
 845                                 sta->sa_query_count + 1,
 846                                 WLAN_SA_QUERY_TR_ID_LEN);
 847         if (nbuf == NULL)
 848                 return;
 849         if (sta->sa_query_count == 0) {
 850                 /* Starting a new SA Query procedure */
 851                 os_get_time(&sta->sa_query_start);
 852         }
 853         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 854         sta->sa_query_trans_id = nbuf;
 855         sta->sa_query_count++;
 856
 857         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 858
 859         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 860         sec = ((timeout / 1000) * 1024) / 1000;
 861         usec = (timeout % 1000) * 1024;
 862         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 863
 864         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 865                        HOSTAPD_LEVEL_DEBUG,
 866                        "association SA Query attempt %d", sta->sa_query_count);
 867
 868         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 869 }
 870
 871
 872 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 873 {
 874         ap_sa_query_timer(hapd, sta);
 875 }
 876
 877
 878 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 879 {
 880         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 881         os_free(sta->sa_query_trans_id);
 882         sta->sa_query_trans_id = NULL;
 883         sta->sa_query_count = 0;
 884 }
 885
 886 #endif /* CONFIG_IEEE80211W */
 887
 888
 889 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 890                            int authorized)
 891 {
 892         const u8 *dev_addr = NULL;
 893         char buf[100];
 894 #ifdef CONFIG_P2P
 895         u8 addr[ETH_ALEN];
 896 #endif /* CONFIG_P2P */
 897
 898         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 899                 return;
 900
 901 #ifdef CONFIG_P2P
 902         if (hapd->p2p_group == NULL) {
 903                 if (sta->p2p_ie != NULL &&
 904                     p2p_parse_dev_addr_in_p2p_ie(sta->p2p_ie, addr) == 0)
 905                         dev_addr = addr;
 906         } else
 907                 dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 908 #endif /* CONFIG_P2P */
 909
 910         if (dev_addr)
 911                 os_snprintf(buf, sizeof(buf), MACSTR " p2p_dev_addr=" MACSTR,
 912                             MAC2STR(sta->addr), MAC2STR(dev_addr));
 913         else
 914                 os_snprintf(buf, sizeof(buf), MACSTR, MAC2STR(sta->addr));
 915
 916         if (authorized) {
 917                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s", buf);
 918
 919                 if (hapd->msg_ctx_parent &&
 920                     hapd->msg_ctx_parent != hapd->msg_ctx)
 921                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 922                                           AP_STA_CONNECTED "%s", buf);
 923
 924                 sta->flags |= WLAN_STA_AUTHORIZED;
 925         } else {
 926                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED "%s", buf);
 927
 928                 if (hapd->msg_ctx_parent &&
 929                     hapd->msg_ctx_parent != hapd->msg_ctx)
 930                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 931                                           AP_STA_DISCONNECTED "%s", buf);
 932
 933                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 934         }
 935
 936         if (hapd->sta_authorized_cb)
 937                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 938                                         sta->addr, authorized, dev_addr);
 939 }
 940
 941
 942 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 943                        const u8 *addr, u16 reason)
 944 {
 945
 946         if (sta == NULL && addr)
 947                 sta = ap_get_sta(hapd, addr);
 948
 949         if (addr)
 950                 hostapd_drv_sta_deauth(hapd, addr, reason);
 951
 952         if (sta == NULL)
 953                 return;
 954         ap_sta_set_authorized(hapd, sta, 0);
 955         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
 956         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 957         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 958         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 959                    "for " MACSTR " (%d seconds - "
 960                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 961                    __func__, MAC2STR(sta->addr),
 962                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 963         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 964         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 965                                ap_handle_timer, hapd, sta);
 966         sta->timeout_next = STA_REMOVE;
 967
 968         sta->deauth_reason = reason;
 969         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 970         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 971         eloop_register_timeout(hapd->iface->drv_flags &
 972                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 973                                ap_sta_deauth_cb_timeout, hapd, sta);
 974 }
 975
 976
 977 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
 978 {
 979         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
 980                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
 981                 return;
 982         }
 983         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
 984         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 985         ap_sta_deauth_cb_timeout(hapd, sta);
 986 }
 987
 988
 989 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
 990 {
 991         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
 992                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
 993                 return;
 994         }
 995         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
 996         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 997         ap_sta_disassoc_cb_timeout(hapd, sta);
 998 }