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         os_free(sta->vht_capabilities);
 266         hostapd_free_psk_list(sta->psk);
 267         os_free(sta->identity);
 268         os_free(sta->radius_cui);
 269
 270 #ifdef CONFIG_SAE
 271         sae_clear_data(sta->sae);
 272         os_free(sta->sae);
 273 #endif /* CONFIG_SAE */
 274
 275         os_free(sta);
 276 }
 277
 278
 279 void hostapd_free_stas(struct hostapd_data *hapd)
 280 {
 281         struct sta_info *sta, *prev;
 282
 283         sta = hapd->sta_list;
 284
 285         while (sta) {
 286                 prev = sta;
 287                 if (sta->flags & WLAN_STA_AUTH) {
 288                         mlme_deauthenticate_indication(
 289                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 290                 }
 291                 sta = sta->next;
 292                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 293                            MAC2STR(prev->addr));
 294                 ap_free_sta(hapd, prev);
 295         }
 296 }
 297
 298
 299 /**
 300  * ap_handle_timer - Per STA timer handler
 301  * @eloop_ctx: struct hostapd_data *
 302  * @timeout_ctx: struct sta_info *
 303  *
 304  * This function is called to check station activity and to remove inactive
 305  * stations.
 306  */
 307 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 308 {
 309         struct hostapd_data *hapd = eloop_ctx;
 310         struct sta_info *sta = timeout_ctx;
 311         unsigned long next_time = 0;
 312         int reason;
 313
 314         wpa_printf(MSG_DEBUG, "%s: " MACSTR " flags=0x%x timeout_next=%d",
 315                    __func__, MAC2STR(sta->addr), sta->flags,
 316                    sta->timeout_next);
 317         if (sta->timeout_next == STA_REMOVE) {
 318                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 319                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 320                                "local deauth request");
 321                 ap_free_sta(hapd, sta);
 322                 return;
 323         }
 324
 325         if ((sta->flags & WLAN_STA_ASSOC) &&
 326             (sta->timeout_next == STA_NULLFUNC ||
 327              sta->timeout_next == STA_DISASSOC)) {
 328                 int inactive_sec;
 329                 /*
 330                  * Add random value to timeout so that we don't end up bouncing
 331                  * all stations at the same time if we have lots of associated
 332                  * stations that are idle (but keep re-associating).
 333                  */
 334                 int fuzz = os_random() % 20;
 335                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 336                 if (inactive_sec == -1) {
 337                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 338                                 "Check inactivity: Could not "
 339                                 "get station info from kernel driver for "
 340                                 MACSTR, MAC2STR(sta->addr));
 341                         /*
 342                          * The driver may not support this functionality.
 343                          * Anyway, try again after the next inactivity timeout,
 344                          * but do not disconnect the station now.
 345                          */
 346                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 347                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 348                            sta->flags & WLAN_STA_ASSOC) {
 349                         /* station activity detected; reset timeout state */
 350                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 351                                 "Station " MACSTR " has been active %is ago",
 352                                 MAC2STR(sta->addr), inactive_sec);
 353                         sta->timeout_next = STA_NULLFUNC;
 354                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 355                                 inactive_sec;
 356                 } else {
 357                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 358                                 "Station " MACSTR " has been "
 359                                 "inactive too long: %d sec, max allowed: %d",
 360                                 MAC2STR(sta->addr), inactive_sec,
 361                                 hapd->conf->ap_max_inactivity);
 362
 363                         if (hapd->conf->skip_inactivity_poll)
 364                                 sta->timeout_next = STA_DISASSOC;
 365                 }
 366         }
 367
 368         if ((sta->flags & WLAN_STA_ASSOC) &&
 369             sta->timeout_next == STA_DISASSOC &&
 370             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 371             !hapd->conf->skip_inactivity_poll) {
 372                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 373                         " has ACKed data poll", MAC2STR(sta->addr));
 374                 /* data nullfunc frame poll did not produce TX errors; assume
 375                  * station ACKed it */
 376                 sta->timeout_next = STA_NULLFUNC;
 377                 next_time = hapd->conf->ap_max_inactivity;
 378         }
 379
 380         if (next_time) {
 381                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 382                            "for " MACSTR " (%lu seconds)",
 383                            __func__, MAC2STR(sta->addr), next_time);
 384                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 385                                        sta);
 386                 return;
 387         }
 388
 389         if (sta->timeout_next == STA_NULLFUNC &&
 390             (sta->flags & WLAN_STA_ASSOC)) {
 391                 wpa_printf(MSG_DEBUG, "  Polling STA");
 392                 sta->flags |= WLAN_STA_PENDING_POLL;
 393                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 394                                         sta->flags & WLAN_STA_WMM);
 395         } else if (sta->timeout_next != STA_REMOVE) {
 396                 int deauth = sta->timeout_next == STA_DEAUTH;
 397
 398                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 399                         "Timeout, sending %s info to STA " MACSTR,
 400                         deauth ? "deauthentication" : "disassociation",
 401                         MAC2STR(sta->addr));
 402
 403                 if (deauth) {
 404                         hostapd_drv_sta_deauth(
 405                                 hapd, sta->addr,
 406                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 407                 } else {
 408                         reason = (sta->timeout_next == STA_DISASSOC) ?
 409                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 410                                 WLAN_REASON_PREV_AUTH_NOT_VALID;
 411
 412                         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
 413                 }
 414         }
 415
 416         switch (sta->timeout_next) {
 417         case STA_NULLFUNC:
 418                 sta->timeout_next = STA_DISASSOC;
 419                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 420                            "for " MACSTR " (%d seconds - AP_DISASSOC_DELAY)",
 421                            __func__, MAC2STR(sta->addr), AP_DISASSOC_DELAY);
 422                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 423                                        hapd, sta);
 424                 break;
 425         case STA_DISASSOC:
 426         case STA_DISASSOC_FROM_CLI:
 427                 ap_sta_set_authorized(hapd, sta, 0);
 428                 sta->flags &= ~WLAN_STA_ASSOC;
 429                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 430                 if (!sta->acct_terminate_cause)
 431                         sta->acct_terminate_cause =
 432                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 433                 accounting_sta_stop(hapd, sta);
 434                 ieee802_1x_free_station(sta);
 435                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 436                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 437                                "inactivity");
 438                 reason = (sta->timeout_next == STA_DISASSOC) ?
 439                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 440                         WLAN_REASON_PREV_AUTH_NOT_VALID;
 441                 sta->timeout_next = STA_DEAUTH;
 442                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 443                            "for " MACSTR " (%d seconds - AP_DEAUTH_DELAY)",
 444                            __func__, MAC2STR(sta->addr), AP_DEAUTH_DELAY);
 445                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 446                                        hapd, sta);
 447                 mlme_disassociate_indication(hapd, sta, reason);
 448                 break;
 449         case STA_DEAUTH:
 450         case STA_REMOVE:
 451                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 452                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 453                                "inactivity (timer DEAUTH/REMOVE)");
 454                 if (!sta->acct_terminate_cause)
 455                         sta->acct_terminate_cause =
 456                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 457                 mlme_deauthenticate_indication(
 458                         hapd, sta,
 459                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 460                 ap_free_sta(hapd, sta);
 461                 break;
 462         }
 463 }
 464
 465
 466 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 467 {
 468         struct hostapd_data *hapd = eloop_ctx;
 469         struct sta_info *sta = timeout_ctx;
 470         u8 addr[ETH_ALEN];
 471
 472         if (!(sta->flags & WLAN_STA_AUTH)) {
 473                 if (sta->flags & WLAN_STA_GAS) {
 474                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 475                                    "entry " MACSTR, MAC2STR(sta->addr));
 476                         ap_free_sta(hapd, sta);
 477                 }
 478                 return;
 479         }
 480
 481         mlme_deauthenticate_indication(hapd, sta,
 482                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 483         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 484                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 485                        "session timeout");
 486         sta->acct_terminate_cause =
 487                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 488         os_memcpy(addr, sta->addr, ETH_ALEN);
 489         ap_free_sta(hapd, sta);
 490         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 491 }
 492
 493
 494 void ap_sta_replenish_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 495                               u32 session_timeout)
 496 {
 497         if (eloop_replenish_timeout(session_timeout, 0,
 498                                     ap_handle_session_timer, hapd, sta)) {
 499                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 500                                HOSTAPD_LEVEL_DEBUG, "setting session timeout "
 501                                "to %d seconds", session_timeout);
 502         }
 503 }
 504
 505
 506 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 507                             u32 session_timeout)
 508 {
 509         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 510                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 511                        "seconds", session_timeout);
 512         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 513         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 514                                hapd, sta);
 515 }
 516
 517
 518 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 519 {
 520         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 521 }
 522
 523
 524 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 525 {
 526         struct sta_info *sta;
 527
 528         sta = ap_get_sta(hapd, addr);
 529         if (sta)
 530                 return sta;
 531
 532         wpa_printf(MSG_DEBUG, "  New STA");
 533         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 534                 /* FIX: might try to remove some old STAs first? */
 535                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 536                            hapd->num_sta, hapd->conf->max_num_sta);
 537                 return NULL;
 538         }
 539
 540         sta = os_zalloc(sizeof(struct sta_info));
 541         if (sta == NULL) {
 542                 wpa_printf(MSG_ERROR, "malloc failed");
 543                 return NULL;
 544         }
 545         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 546         accounting_sta_get_id(hapd, sta);
 547
 548         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
 549                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 550                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
 551                            __func__, MAC2STR(addr),
 552                            hapd->conf->ap_max_inactivity);
 553                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 554                                        ap_handle_timer, hapd, sta);
 555         }
 556
 557         /* initialize STA info data */
 558         os_memcpy(sta->addr, addr, ETH_ALEN);
 559         sta->next = hapd->sta_list;
 560         hapd->sta_list = sta;
 561         hapd->num_sta++;
 562         ap_sta_hash_add(hapd, sta);
 563         sta->ssid = &hapd->conf->ssid;
 564         ap_sta_remove_in_other_bss(hapd, sta);
 565
 566         return sta;
 567 }
 568
 569
 570 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 571 {
 572         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 573
 574         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 575                    MAC2STR(sta->addr));
 576         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 577             sta->flags & WLAN_STA_ASSOC) {
 578                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 579                            " from kernel driver.", MAC2STR(sta->addr));
 580                 return -1;
 581         }
 582         return 0;
 583 }
 584
 585
 586 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 587                                        struct sta_info *sta)
 588 {
 589         struct hostapd_iface *iface = hapd->iface;
 590         size_t i;
 591
 592         for (i = 0; i < iface->num_bss; i++) {
 593                 struct hostapd_data *bss = iface->bss[i];
 594                 struct sta_info *sta2;
 595                 /* bss should always be set during operation, but it may be
 596                  * NULL during reconfiguration. Assume the STA is not
 597                  * associated to another BSS in that case to avoid NULL pointer
 598                  * dereferences. */
 599                 if (bss == hapd || bss == NULL)
 600                         continue;
 601                 sta2 = ap_get_sta(bss, sta->addr);
 602                 if (!sta2)
 603                         continue;
 604
 605                 ap_sta_disconnect(bss, sta2, sta2->addr,
 606                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 607         }
 608 }
 609
 610
 611 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 612 {
 613         struct hostapd_data *hapd = eloop_ctx;
 614         struct sta_info *sta = timeout_ctx;
 615
 616         ap_sta_remove(hapd, sta);
 617         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 618 }
 619
 620
 621 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 622                          u16 reason)
 623 {
 624         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 625                    hapd->conf->iface, MAC2STR(sta->addr));
 626         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
 627         ap_sta_set_authorized(hapd, sta, 0);
 628         sta->timeout_next = STA_DEAUTH;
 629         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 630                    "for " MACSTR " (%d seconds - "
 631                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 632                    __func__, MAC2STR(sta->addr),
 633                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 634         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 635         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 636                                ap_handle_timer, hapd, sta);
 637         accounting_sta_stop(hapd, sta);
 638         ieee802_1x_free_station(sta);
 639
 640         sta->disassoc_reason = reason;
 641         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 642         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 643         eloop_register_timeout(hapd->iface->drv_flags &
 644                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 645                                ap_sta_disassoc_cb_timeout, hapd, sta);
 646 }
 647
 648
 649 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 650 {
 651         struct hostapd_data *hapd = eloop_ctx;
 652         struct sta_info *sta = timeout_ctx;
 653
 654         ap_sta_remove(hapd, sta);
 655         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 656 }
 657
 658
 659 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 660                            u16 reason)
 661 {
 662         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 663                    hapd->conf->iface, MAC2STR(sta->addr));
 664         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 665         ap_sta_set_authorized(hapd, sta, 0);
 666         sta->timeout_next = STA_REMOVE;
 667         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 668                    "for " MACSTR " (%d seconds - "
 669                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 670                    __func__, MAC2STR(sta->addr),
 671                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 672         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 673         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 674                                ap_handle_timer, hapd, sta);
 675         accounting_sta_stop(hapd, sta);
 676         ieee802_1x_free_station(sta);
 677
 678         sta->deauth_reason = reason;
 679         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 680         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 681         eloop_register_timeout(hapd->iface->drv_flags &
 682                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 683                                ap_sta_deauth_cb_timeout, hapd, sta);
 684 }
 685
 686
 687 #ifdef CONFIG_WPS
 688 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 689                       struct sta_info *sta, void *ctx)
 690 {
 691         if (sta && (sta->flags & WLAN_STA_WPS)) {
 692                 ap_sta_deauthenticate(hapd, sta,
 693                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 694                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 695                            __func__, MAC2STR(sta->addr));
 696                 return 1;
 697         }
 698
 699         return 0;
 700 }
 701 #endif /* CONFIG_WPS */
 702
 703
 704 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 705                      int old_vlanid)
 706 {
 707 #ifndef CONFIG_NO_VLAN
 708         const char *iface;
 709         struct hostapd_vlan *vlan = NULL;
 710         int ret;
 711
 712         /*
 713          * Do not proceed furthur if the vlan id remains same. We do not want
 714          * duplicate dynamic vlan entries.
 715          */
 716         if (sta->vlan_id == old_vlanid)
 717                 return 0;
 718
 719         /*
 720          * During 1x reauth, if the vlan id changes, then remove the old id and
 721          * proceed furthur to add the new one.
 722          */
 723         if (old_vlanid > 0)
 724                 vlan_remove_dynamic(hapd, old_vlanid);
 725
 726         iface = hapd->conf->iface;
 727         if (sta->ssid->vlan[0])
 728                 iface = sta->ssid->vlan;
 729
 730         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 731                 sta->vlan_id = 0;
 732         else if (sta->vlan_id > 0) {
 733                 struct hostapd_vlan *wildcard_vlan = NULL;
 734                 vlan = hapd->conf->vlan;
 735                 while (vlan) {
 736                         if (vlan->vlan_id == sta->vlan_id)
 737                                 break;
 738                         if (vlan->vlan_id == VLAN_ID_WILDCARD)
 739                                 wildcard_vlan = vlan;
 740                         vlan = vlan->next;
 741                 }
 742                 if (!vlan)
 743                         vlan = wildcard_vlan;
 744                 if (vlan)
 745                         iface = vlan->ifname;
 746         }
 747
 748         if (sta->vlan_id > 0 && vlan == NULL) {
 749                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 750                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 751                                "binding station to (vlan_id=%d)",
 752                                sta->vlan_id);
 753                 return -1;
 754         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 755                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 756                 if (vlan == NULL) {
 757                         hostapd_logger(hapd, sta->addr,
 758                                        HOSTAPD_MODULE_IEEE80211,
 759                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 760                                        "dynamic VLAN interface for vlan_id=%d",
 761                                        sta->vlan_id);
 762                         return -1;
 763                 }
 764
 765                 iface = vlan->ifname;
 766                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 767                         hostapd_logger(hapd, sta->addr,
 768                                        HOSTAPD_MODULE_IEEE80211,
 769                                        HOSTAPD_LEVEL_DEBUG, "could not "
 770                                        "configure encryption for dynamic VLAN "
 771                                        "interface for vlan_id=%d",
 772                                        sta->vlan_id);
 773                 }
 774
 775                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 776                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 777                                "interface '%s'", iface);
 778         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 779                 if (sta->vlan_id > 0) {
 780                         vlan->dynamic_vlan++;
 781                         hostapd_logger(hapd, sta->addr,
 782                                        HOSTAPD_MODULE_IEEE80211,
 783                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 784                                        "dynamic VLAN interface '%s'", iface);
 785                 }
 786
 787                 /*
 788                  * Update encryption configuration for statically generated
 789                  * VLAN interface. This is only used for static WEP
 790                  * configuration for the case where hostapd did not yet know
 791                  * which keys are to be used when the interface was added.
 792                  */
 793                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 794                         hostapd_logger(hapd, sta->addr,
 795                                        HOSTAPD_MODULE_IEEE80211,
 796                                        HOSTAPD_LEVEL_DEBUG, "could not "
 797                                        "configure encryption for VLAN "
 798                                        "interface for vlan_id=%d",
 799                                        sta->vlan_id);
 800                 }
 801         }
 802
 803         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 804                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 805                        "'%s'", iface);
 806
 807         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 808                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 809
 810         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 811         if (ret < 0) {
 812                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 813                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 814                                "entry to vlan_id=%d", sta->vlan_id);
 815         }
 816         return ret;
 817 #else /* CONFIG_NO_VLAN */
 818         return 0;
 819 #endif /* CONFIG_NO_VLAN */
 820 }
 821
 822
 823 #ifdef CONFIG_IEEE80211W
 824
 825 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 826 {
 827         u32 tu;
 828         struct os_reltime now, passed;
 829         os_get_reltime(&now);
 830         os_reltime_sub(&now, &sta->sa_query_start, &passed);
 831         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 832         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 833                 hostapd_logger(hapd, sta->addr,
 834                                HOSTAPD_MODULE_IEEE80211,
 835                                HOSTAPD_LEVEL_DEBUG,
 836                                "association SA Query timed out");
 837                 sta->sa_query_timed_out = 1;
 838                 os_free(sta->sa_query_trans_id);
 839                 sta->sa_query_trans_id = NULL;
 840                 sta->sa_query_count = 0;
 841                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 842                 return 1;
 843         }
 844
 845         return 0;
 846 }
 847
 848
 849 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 850 {
 851         struct hostapd_data *hapd = eloop_ctx;
 852         struct sta_info *sta = timeout_ctx;
 853         unsigned int timeout, sec, usec;
 854         u8 *trans_id, *nbuf;
 855
 856         if (sta->sa_query_count > 0 &&
 857             ap_check_sa_query_timeout(hapd, sta))
 858                 return;
 859
 860         nbuf = os_realloc_array(sta->sa_query_trans_id,
 861                                 sta->sa_query_count + 1,
 862                                 WLAN_SA_QUERY_TR_ID_LEN);
 863         if (nbuf == NULL)
 864                 return;
 865         if (sta->sa_query_count == 0) {
 866                 /* Starting a new SA Query procedure */
 867                 os_get_reltime(&sta->sa_query_start);
 868         }
 869         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 870         sta->sa_query_trans_id = nbuf;
 871         sta->sa_query_count++;
 872
 873         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 874
 875         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 876         sec = ((timeout / 1000) * 1024) / 1000;
 877         usec = (timeout % 1000) * 1024;
 878         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 879
 880         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 881                        HOSTAPD_LEVEL_DEBUG,
 882                        "association SA Query attempt %d", sta->sa_query_count);
 883
 884         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 885 }
 886
 887
 888 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 889 {
 890         ap_sa_query_timer(hapd, sta);
 891 }
 892
 893
 894 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 895 {
 896         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 897         os_free(sta->sa_query_trans_id);
 898         sta->sa_query_trans_id = NULL;
 899         sta->sa_query_count = 0;
 900 }
 901
 902 #endif /* CONFIG_IEEE80211W */
 903
 904
 905 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 906                            int authorized)
 907 {
 908         const u8 *dev_addr = NULL;
 909         char buf[100];
 910 #ifdef CONFIG_P2P
 911         u8 addr[ETH_ALEN];
 912 #endif /* CONFIG_P2P */
 913
 914         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 915                 return;
 916
 917 #ifdef CONFIG_P2P
 918         if (hapd->p2p_group == NULL) {
 919                 if (sta->p2p_ie != NULL &&
 920                     p2p_parse_dev_addr_in_p2p_ie(sta->p2p_ie, addr) == 0)
 921                         dev_addr = addr;
 922         } else
 923                 dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 924 #endif /* CONFIG_P2P */
 925
 926         if (dev_addr)
 927                 os_snprintf(buf, sizeof(buf), MACSTR " p2p_dev_addr=" MACSTR,
 928                             MAC2STR(sta->addr), MAC2STR(dev_addr));
 929         else
 930                 os_snprintf(buf, sizeof(buf), MACSTR, MAC2STR(sta->addr));
 931
 932         if (authorized) {
 933                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s", buf);
 934
 935                 if (hapd->msg_ctx_parent &&
 936                     hapd->msg_ctx_parent != hapd->msg_ctx)
 937                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 938                                           AP_STA_CONNECTED "%s", buf);
 939
 940                 sta->flags |= WLAN_STA_AUTHORIZED;
 941         } else {
 942                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED "%s", buf);
 943
 944                 if (hapd->msg_ctx_parent &&
 945                     hapd->msg_ctx_parent != hapd->msg_ctx)
 946                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 947                                           AP_STA_DISCONNECTED "%s", buf);
 948
 949                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 950         }
 951
 952         if (hapd->sta_authorized_cb)
 953                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 954                                         sta->addr, authorized, dev_addr);
 955 }
 956
 957
 958 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 959                        const u8 *addr, u16 reason)
 960 {
 961
 962         if (sta == NULL && addr)
 963                 sta = ap_get_sta(hapd, addr);
 964
 965         if (addr)
 966                 hostapd_drv_sta_deauth(hapd, addr, reason);
 967
 968         if (sta == NULL)
 969                 return;
 970         ap_sta_set_authorized(hapd, sta, 0);
 971         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
 972         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 973         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 974         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 975                    "for " MACSTR " (%d seconds - "
 976                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 977                    __func__, MAC2STR(sta->addr),
 978                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 979         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 980         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 981                                ap_handle_timer, hapd, sta);
 982         sta->timeout_next = STA_REMOVE;
 983
 984         sta->deauth_reason = reason;
 985         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 986         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 987         eloop_register_timeout(hapd->iface->drv_flags &
 988                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 989                                ap_sta_deauth_cb_timeout, hapd, sta);
 990 }
 991
 992
 993 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
 994 {
 995         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
 996                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
 997                 return;
 998         }
 999         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
1000         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1001         ap_sta_deauth_cb_timeout(hapd, sta);
1002 }
1003
1004
1005 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
1006 {
1007         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
1008                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
1009                 return;
1010         }
1011         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
1012         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
1013         ap_sta_disassoc_cb_timeout(hapd, sta);
1014 }