contrib/hostapd/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 "p2p/p2p.h"
  19 #include "hostapd.h"
  20 #include "accounting.h"
  21 #include "ieee802_1x.h"
  22 #include "ieee802_11.h"
  23 #include "ieee802_11_auth.h"
  24 #include "wpa_auth.h"
  25 #include "preauth_auth.h"
  26 #include "ap_config.h"
  27 #include "beacon.h"
  28 #include "ap_mlme.h"
  29 #include "vlan_init.h"
  30 #include "p2p_hostapd.h"
  31 #include "ap_drv_ops.h"
  32 #include "gas_serv.h"
  33 #include "sta_info.h"
  34
  35 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
  36                                        struct sta_info *sta);
  37 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  38 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx);
  39 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx);
  40 #ifdef CONFIG_IEEE80211W
  41 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  42 #endif /* CONFIG_IEEE80211W */
  43 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta);
  44
  45 int ap_for_each_sta(struct hostapd_data *hapd,
  46                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  47                               void *ctx),
  48                     void *ctx)
  49 {
  50         struct sta_info *sta;
  51
  52         for (sta = hapd->sta_list; sta; sta = sta->next) {
  53                 if (cb(hapd, sta, ctx))
  54                         return 1;
  55         }
  56
  57         return 0;
  58 }
  59
  60
  61 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  62 {
  63         struct sta_info *s;
  64
  65         s = hapd->sta_hash[STA_HASH(sta)];
  66         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  67                 s = s->hnext;
  68         return s;
  69 }
  70
  71
  72 #ifdef CONFIG_P2P
  73 struct sta_info * ap_get_sta_p2p(struct hostapd_data *hapd, const u8 *addr)
  74 {
  75         struct sta_info *sta;
  76
  77         for (sta = hapd->sta_list; sta; sta = sta->next) {
  78                 const u8 *p2p_dev_addr;
  79
  80                 if (sta->p2p_ie == NULL)
  81                         continue;
  82
  83                 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
  84                 if (p2p_dev_addr == NULL)
  85                         continue;
  86
  87                 if (os_memcmp(p2p_dev_addr, addr, ETH_ALEN) == 0)
  88                         return sta;
  89         }
  90
  91         return NULL;
  92 }
  93 #endif /* CONFIG_P2P */
  94
  95
  96 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  97 {
  98         struct sta_info *tmp;
  99
 100         if (hapd->sta_list == sta) {
 101                 hapd->sta_list = sta->next;
 102                 return;
 103         }
 104
 105         tmp = hapd->sta_list;
 106         while (tmp != NULL && tmp->next != sta)
 107                 tmp = tmp->next;
 108         if (tmp == NULL) {
 109                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
 110                            "list.", MAC2STR(sta->addr));
 111         } else
 112                 tmp->next = sta->next;
 113 }
 114
 115
 116 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
 117 {
 118         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
 119         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
 120 }
 121
 122
 123 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
 124 {
 125         struct sta_info *s;
 126
 127         s = hapd->sta_hash[STA_HASH(sta->addr)];
 128         if (s == NULL) return;
 129         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 130                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 131                 return;
 132         }
 133
 134         while (s->hnext != NULL &&
 135                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 136                 s = s->hnext;
 137         if (s->hnext != NULL)
 138                 s->hnext = s->hnext->hnext;
 139         else
 140                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 141                            " from hash table", MAC2STR(sta->addr));
 142 }
 143
 144
 145 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 146 {
 147         int set_beacon = 0;
 148
 149         accounting_sta_stop(hapd, sta);
 150
 151         /* just in case */
 152         ap_sta_set_authorized(hapd, sta, 0);
 153
 154         if (sta->flags & WLAN_STA_WDS)
 155                 hostapd_set_wds_sta(hapd, NULL, sta->addr, sta->aid, 0);
 156
 157         if (!(sta->flags & WLAN_STA_PREAUTH))
 158                 hostapd_drv_sta_remove(hapd, sta->addr);
 159
 160         ap_sta_hash_del(hapd, sta);
 161         ap_sta_list_del(hapd, sta);
 162
 163         if (sta->aid > 0)
 164                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 165                         ~BIT((sta->aid - 1) % 32);
 166
 167         hapd->num_sta--;
 168         if (sta->nonerp_set) {
 169                 sta->nonerp_set = 0;
 170                 hapd->iface->num_sta_non_erp--;
 171                 if (hapd->iface->num_sta_non_erp == 0)
 172                         set_beacon++;
 173         }
 174
 175         if (sta->no_short_slot_time_set) {
 176                 sta->no_short_slot_time_set = 0;
 177                 hapd->iface->num_sta_no_short_slot_time--;
 178                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 179                     && hapd->iface->num_sta_no_short_slot_time == 0)
 180                         set_beacon++;
 181         }
 182
 183         if (sta->no_short_preamble_set) {
 184                 sta->no_short_preamble_set = 0;
 185                 hapd->iface->num_sta_no_short_preamble--;
 186                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 187                     && hapd->iface->num_sta_no_short_preamble == 0)
 188                         set_beacon++;
 189         }
 190
 191         if (sta->no_ht_gf_set) {
 192                 sta->no_ht_gf_set = 0;
 193                 hapd->iface->num_sta_ht_no_gf--;
 194         }
 195
 196         if (sta->no_ht_set) {
 197                 sta->no_ht_set = 0;
 198                 hapd->iface->num_sta_no_ht--;
 199         }
 200
 201         if (sta->ht_20mhz_set) {
 202                 sta->ht_20mhz_set = 0;
 203                 hapd->iface->num_sta_ht_20mhz--;
 204         }
 205
 206 #ifdef CONFIG_P2P
 207         if (sta->no_p2p_set) {
 208                 sta->no_p2p_set = 0;
 209                 hapd->num_sta_no_p2p--;
 210                 if (hapd->num_sta_no_p2p == 0)
 211                         hostapd_p2p_non_p2p_sta_disconnected(hapd);
 212         }
 213 #endif /* CONFIG_P2P */
 214
 215 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 216         if (hostapd_ht_operation_update(hapd->iface) > 0)
 217                 set_beacon++;
 218 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 219
 220         if (set_beacon)
 221                 ieee802_11_set_beacons(hapd->iface);
 222
 223         wpa_printf(MSG_DEBUG, "%s: cancel ap_handle_timer for " MACSTR,
 224                    __func__, MAC2STR(sta->addr));
 225         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 226         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 227         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 228         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 229
 230         ieee802_1x_free_station(sta);
 231         wpa_auth_sta_deinit(sta->wpa_sm);
 232         rsn_preauth_free_station(hapd, sta);
 233 #ifndef CONFIG_NO_RADIUS
 234         if (hapd->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         os_free(sta->vht_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_replenish_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 494                               u32 session_timeout)
 495 {
 496         if (eloop_replenish_timeout(session_timeout, 0,
 497                                     ap_handle_session_timer, hapd, sta) == 1) {
 498                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 499                                HOSTAPD_LEVEL_DEBUG, "setting session timeout "
 500                                "to %d seconds", session_timeout);
 501         }
 502 }
 503
 504
 505 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 506                             u32 session_timeout)
 507 {
 508         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 509                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 510                        "seconds", session_timeout);
 511         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 512         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 513                                hapd, sta);
 514 }
 515
 516
 517 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 518 {
 519         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 520 }
 521
 522
 523 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 524 {
 525         struct sta_info *sta;
 526
 527         sta = ap_get_sta(hapd, addr);
 528         if (sta)
 529                 return sta;
 530
 531         wpa_printf(MSG_DEBUG, "  New STA");
 532         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 533                 /* FIX: might try to remove some old STAs first? */
 534                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 535                            hapd->num_sta, hapd->conf->max_num_sta);
 536                 return NULL;
 537         }
 538
 539         sta = os_zalloc(sizeof(struct sta_info));
 540         if (sta == NULL) {
 541                 wpa_printf(MSG_ERROR, "malloc failed");
 542                 return NULL;
 543         }
 544         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 545         accounting_sta_get_id(hapd, sta);
 546
 547         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
 548                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 549                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
 550                            __func__, MAC2STR(addr),
 551                            hapd->conf->ap_max_inactivity);
 552                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 553                                        ap_handle_timer, hapd, sta);
 554         }
 555
 556         /* initialize STA info data */
 557         os_memcpy(sta->addr, addr, ETH_ALEN);
 558         sta->next = hapd->sta_list;
 559         hapd->sta_list = sta;
 560         hapd->num_sta++;
 561         ap_sta_hash_add(hapd, sta);
 562         sta->ssid = &hapd->conf->ssid;
 563         ap_sta_remove_in_other_bss(hapd, sta);
 564
 565         return sta;
 566 }
 567
 568
 569 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 570 {
 571         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 572
 573         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 574                    MAC2STR(sta->addr));
 575         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 576             sta->flags & WLAN_STA_ASSOC) {
 577                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 578                            " from kernel driver.", MAC2STR(sta->addr));
 579                 return -1;
 580         }
 581         return 0;
 582 }
 583
 584
 585 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 586                                        struct sta_info *sta)
 587 {
 588         struct hostapd_iface *iface = hapd->iface;
 589         size_t i;
 590
 591         for (i = 0; i < iface->num_bss; i++) {
 592                 struct hostapd_data *bss = iface->bss[i];
 593                 struct sta_info *sta2;
 594                 /* bss should always be set during operation, but it may be
 595                  * NULL during reconfiguration. Assume the STA is not
 596                  * associated to another BSS in that case to avoid NULL pointer
 597                  * dereferences. */
 598                 if (bss == hapd || bss == NULL)
 599                         continue;
 600                 sta2 = ap_get_sta(bss, sta->addr);
 601                 if (!sta2)
 602                         continue;
 603
 604                 ap_sta_disconnect(bss, sta2, sta2->addr,
 605                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 606         }
 607 }
 608
 609
 610 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 611 {
 612         struct hostapd_data *hapd = eloop_ctx;
 613         struct sta_info *sta = timeout_ctx;
 614
 615         ap_sta_remove(hapd, sta);
 616         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 617 }
 618
 619
 620 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 621                          u16 reason)
 622 {
 623         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 624                    hapd->conf->iface, MAC2STR(sta->addr));
 625         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
 626         ap_sta_set_authorized(hapd, sta, 0);
 627         sta->timeout_next = STA_DEAUTH;
 628         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 629                    "for " MACSTR " (%d seconds - "
 630                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 631                    __func__, MAC2STR(sta->addr),
 632                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 633         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 634         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 635                                ap_handle_timer, hapd, sta);
 636         accounting_sta_stop(hapd, sta);
 637         ieee802_1x_free_station(sta);
 638
 639         sta->disassoc_reason = reason;
 640         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 641         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 642         eloop_register_timeout(hapd->iface->drv_flags &
 643                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 644                                ap_sta_disassoc_cb_timeout, hapd, sta);
 645 }
 646
 647
 648 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 649 {
 650         struct hostapd_data *hapd = eloop_ctx;
 651         struct sta_info *sta = timeout_ctx;
 652
 653         ap_sta_remove(hapd, sta);
 654         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 655 }
 656
 657
 658 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 659                            u16 reason)
 660 {
 661         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 662                    hapd->conf->iface, MAC2STR(sta->addr));
 663         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 664         ap_sta_set_authorized(hapd, sta, 0);
 665         sta->timeout_next = STA_REMOVE;
 666         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 667                    "for " MACSTR " (%d seconds - "
 668                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 669                    __func__, MAC2STR(sta->addr),
 670                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 671         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 672         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 673                                ap_handle_timer, hapd, sta);
 674         accounting_sta_stop(hapd, sta);
 675         ieee802_1x_free_station(sta);
 676
 677         sta->deauth_reason = reason;
 678         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 679         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 680         eloop_register_timeout(hapd->iface->drv_flags &
 681                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 682                                ap_sta_deauth_cb_timeout, hapd, sta);
 683 }
 684
 685
 686 #ifdef CONFIG_WPS
 687 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 688                       struct sta_info *sta, void *ctx)
 689 {
 690         if (sta && (sta->flags & WLAN_STA_WPS)) {
 691                 ap_sta_deauthenticate(hapd, sta,
 692                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 693                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 694                            __func__, MAC2STR(sta->addr));
 695                 return 1;
 696         }
 697
 698         return 0;
 699 }
 700 #endif /* CONFIG_WPS */
 701
 702
 703 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 704                      int old_vlanid)
 705 {
 706 #ifndef CONFIG_NO_VLAN
 707         const char *iface;
 708         struct hostapd_vlan *vlan = NULL;
 709         int ret;
 710
 711         /*
 712          * Do not proceed furthur if the vlan id remains same. We do not want
 713          * duplicate dynamic vlan entries.
 714          */
 715         if (sta->vlan_id == old_vlanid)
 716                 return 0;
 717
 718         /*
 719          * During 1x reauth, if the vlan id changes, then remove the old id and
 720          * proceed furthur to add the new one.
 721          */
 722         if (old_vlanid > 0)
 723                 vlan_remove_dynamic(hapd, old_vlanid);
 724
 725         iface = hapd->conf->iface;
 726         if (sta->ssid->vlan[0])
 727                 iface = sta->ssid->vlan;
 728
 729         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 730                 sta->vlan_id = 0;
 731         else if (sta->vlan_id > 0) {
 732                 struct hostapd_vlan *wildcard_vlan = NULL;
 733                 vlan = hapd->conf->vlan;
 734                 while (vlan) {
 735                         if (vlan->vlan_id == sta->vlan_id)
 736                                 break;
 737                         if (vlan->vlan_id == VLAN_ID_WILDCARD)
 738                                 wildcard_vlan = vlan;
 739                         vlan = vlan->next;
 740                 }
 741                 if (!vlan)
 742                         vlan = wildcard_vlan;
 743                 if (vlan)
 744                         iface = vlan->ifname;
 745         }
 746
 747         if (sta->vlan_id > 0 && vlan == NULL) {
 748                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 749                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 750                                "binding station to (vlan_id=%d)",
 751                                sta->vlan_id);
 752                 return -1;
 753         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 754                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 755                 if (vlan == NULL) {
 756                         hostapd_logger(hapd, sta->addr,
 757                                        HOSTAPD_MODULE_IEEE80211,
 758                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 759                                        "dynamic VLAN interface for vlan_id=%d",
 760                                        sta->vlan_id);
 761                         return -1;
 762                 }
 763
 764                 iface = vlan->ifname;
 765                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 766                         hostapd_logger(hapd, sta->addr,
 767                                        HOSTAPD_MODULE_IEEE80211,
 768                                        HOSTAPD_LEVEL_DEBUG, "could not "
 769                                        "configure encryption for dynamic VLAN "
 770                                        "interface for vlan_id=%d",
 771                                        sta->vlan_id);
 772                 }
 773
 774                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 775                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 776                                "interface '%s'", iface);
 777         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 778                 if (sta->vlan_id > 0) {
 779                         vlan->dynamic_vlan++;
 780                         hostapd_logger(hapd, sta->addr,
 781                                        HOSTAPD_MODULE_IEEE80211,
 782                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 783                                        "dynamic VLAN interface '%s'", iface);
 784                 }
 785
 786                 /*
 787                  * Update encryption configuration for statically generated
 788                  * VLAN interface. This is only used for static WEP
 789                  * configuration for the case where hostapd did not yet know
 790                  * which keys are to be used when the interface was added.
 791                  */
 792                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 793                         hostapd_logger(hapd, sta->addr,
 794                                        HOSTAPD_MODULE_IEEE80211,
 795                                        HOSTAPD_LEVEL_DEBUG, "could not "
 796                                        "configure encryption for VLAN "
 797                                        "interface for vlan_id=%d",
 798                                        sta->vlan_id);
 799                 }
 800         }
 801
 802         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 803                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 804                        "'%s'", iface);
 805
 806         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 807                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 808
 809         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 810         if (ret < 0) {
 811                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 812                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 813                                "entry to vlan_id=%d", sta->vlan_id);
 814         }
 815         return ret;
 816 #else /* CONFIG_NO_VLAN */
 817         return 0;
 818 #endif /* CONFIG_NO_VLAN */
 819 }
 820
 821
 822 #ifdef CONFIG_IEEE80211W
 823
 824 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 825 {
 826         u32 tu;
 827         struct os_reltime now, passed;
 828         os_get_reltime(&now);
 829         os_reltime_sub(&now, &sta->sa_query_start, &passed);
 830         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 831         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 832                 hostapd_logger(hapd, sta->addr,
 833                                HOSTAPD_MODULE_IEEE80211,
 834                                HOSTAPD_LEVEL_DEBUG,
 835                                "association SA Query timed out");
 836                 sta->sa_query_timed_out = 1;
 837                 os_free(sta->sa_query_trans_id);
 838                 sta->sa_query_trans_id = NULL;
 839                 sta->sa_query_count = 0;
 840                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 841                 return 1;
 842         }
 843
 844         return 0;
 845 }
 846
 847
 848 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 849 {
 850         struct hostapd_data *hapd = eloop_ctx;
 851         struct sta_info *sta = timeout_ctx;
 852         unsigned int timeout, sec, usec;
 853         u8 *trans_id, *nbuf;
 854
 855         if (sta->sa_query_count > 0 &&
 856             ap_check_sa_query_timeout(hapd, sta))
 857                 return;
 858
 859         nbuf = os_realloc_array(sta->sa_query_trans_id,
 860                                 sta->sa_query_count + 1,
 861                                 WLAN_SA_QUERY_TR_ID_LEN);
 862         if (nbuf == NULL)
 863                 return;
 864         if (sta->sa_query_count == 0) {
 865                 /* Starting a new SA Query procedure */
 866                 os_get_reltime(&sta->sa_query_start);
 867         }
 868         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 869         sta->sa_query_trans_id = nbuf;
 870         sta->sa_query_count++;
 871
 872         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 873
 874         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 875         sec = ((timeout / 1000) * 1024) / 1000;
 876         usec = (timeout % 1000) * 1024;
 877         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 878
 879         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 880                        HOSTAPD_LEVEL_DEBUG,
 881                        "association SA Query attempt %d", sta->sa_query_count);
 882
 883         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 884 }
 885
 886
 887 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 888 {
 889         ap_sa_query_timer(hapd, sta);
 890 }
 891
 892
 893 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 894 {
 895         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 896         os_free(sta->sa_query_trans_id);
 897         sta->sa_query_trans_id = NULL;
 898         sta->sa_query_count = 0;
 899 }
 900
 901 #endif /* CONFIG_IEEE80211W */
 902
 903
 904 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 905                            int authorized)
 906 {
 907         const u8 *dev_addr = NULL;
 908         char buf[100];
 909 #ifdef CONFIG_P2P
 910         u8 addr[ETH_ALEN];
 911         u8 ip_addr_buf[4];
 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                 char ip_addr[100];
 934                 ip_addr[0] = '\0';
 935 #ifdef CONFIG_P2P
 936                 if (wpa_auth_get_ip_addr(sta->wpa_sm, ip_addr_buf) == 0) {
 937                         os_snprintf(ip_addr, sizeof(ip_addr),
 938                                     " ip_addr=%u.%u.%u.%u",
 939                                     ip_addr_buf[0], ip_addr_buf[1],
 940                                     ip_addr_buf[2], ip_addr_buf[3]);
 941                 }
 942 #endif /* CONFIG_P2P */
 943
 944                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s%s",
 945                         buf, ip_addr);
 946
 947                 if (hapd->msg_ctx_parent &&
 948                     hapd->msg_ctx_parent != hapd->msg_ctx)
 949                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 950                                           AP_STA_CONNECTED "%s%s",
 951                                           buf, ip_addr);
 952
 953                 sta->flags |= WLAN_STA_AUTHORIZED;
 954         } else {
 955                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED "%s", buf);
 956
 957                 if (hapd->msg_ctx_parent &&
 958                     hapd->msg_ctx_parent != hapd->msg_ctx)
 959                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 960                                           AP_STA_DISCONNECTED "%s", buf);
 961
 962                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 963         }
 964
 965         if (hapd->sta_authorized_cb)
 966                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 967                                         sta->addr, authorized, dev_addr);
 968 }
 969
 970
 971 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 972                        const u8 *addr, u16 reason)
 973 {
 974
 975         if (sta == NULL && addr)
 976                 sta = ap_get_sta(hapd, addr);
 977
 978         if (addr)
 979                 hostapd_drv_sta_deauth(hapd, addr, reason);
 980
 981         if (sta == NULL)
 982                 return;
 983         ap_sta_set_authorized(hapd, sta, 0);
 984         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
 985         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 986         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 987         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 988                    "for " MACSTR " (%d seconds - "
 989                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 990                    __func__, MAC2STR(sta->addr),
 991                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 992         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 993         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 994                                ap_handle_timer, hapd, sta);
 995         sta->timeout_next = STA_REMOVE;
 996
 997         sta->deauth_reason = reason;
 998         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 999         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1000         eloop_register_timeout(hapd->iface->drv_flags &
1001                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
1002                                ap_sta_deauth_cb_timeout, hapd, sta);
1003 }
1004
1005
1006 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
1007 {
1008         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
1009                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
1010                 return;
1011         }
1012         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
1013         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1014         ap_sta_deauth_cb_timeout(hapd, sta);
1015 }
1016
1017
1018 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
1019 {
1020         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
1021                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
1022                 return;
1023         }
1024         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
1025         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
1026         ap_sta_disassoc_cb_timeout(hapd, sta);
1027 }
1028
1029
1030 int ap_sta_flags_txt(u32 flags, char *buf, size_t buflen)
1031 {
1032         int res;
1033
1034         buf[0] = '\0';
1035         res = os_snprintf(buf, buflen, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1036                           (flags & WLAN_STA_AUTH ? "[AUTH]" : ""),
1037                           (flags & WLAN_STA_ASSOC ? "[ASSOC]" : ""),
1038                           (flags & WLAN_STA_AUTHORIZED ? "[AUTHORIZED]" : ""),
1039                           (flags & WLAN_STA_PENDING_POLL ? "[PENDING_POLL" :
1040                            ""),
1041                           (flags & WLAN_STA_SHORT_PREAMBLE ?
1042                            "[SHORT_PREAMBLE]" : ""),
1043                           (flags & WLAN_STA_PREAUTH ? "[PREAUTH]" : ""),
1044                           (flags & WLAN_STA_WMM ? "[WMM]" : ""),
1045                           (flags & WLAN_STA_MFP ? "[MFP]" : ""),
1046                           (flags & WLAN_STA_WPS ? "[WPS]" : ""),
1047                           (flags & WLAN_STA_MAYBE_WPS ? "[MAYBE_WPS]" : ""),
1048                           (flags & WLAN_STA_WDS ? "[WDS]" : ""),
1049                           (flags & WLAN_STA_NONERP ? "[NonERP]" : ""),
1050                           (flags & WLAN_STA_WPS2 ? "[WPS2]" : ""),
1051                           (flags & WLAN_STA_GAS ? "[GAS]" : ""),
1052                           (flags & WLAN_STA_VHT ? "[VHT]" : ""),
1053                           (flags & WLAN_STA_WNM_SLEEP_MODE ?
1054                            "[WNM_SLEEP_MODE]" : ""));
1055
1056         return res;
1057 }