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         os_free(sta->remediation_url);
 269         wpabuf_free(sta->hs20_deauth_req);
 270
 271 #ifdef CONFIG_SAE
 272         sae_clear_data(sta->sae);
 273         os_free(sta->sae);
 274 #endif /* CONFIG_SAE */
 275
 276         os_free(sta);
 277 }
 278
 279
 280 void hostapd_free_stas(struct hostapd_data *hapd)
 281 {
 282         struct sta_info *sta, *prev;
 283
 284         sta = hapd->sta_list;
 285
 286         while (sta) {
 287                 prev = sta;
 288                 if (sta->flags & WLAN_STA_AUTH) {
 289                         mlme_deauthenticate_indication(
 290                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 291                 }
 292                 sta = sta->next;
 293                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 294                            MAC2STR(prev->addr));
 295                 ap_free_sta(hapd, prev);
 296         }
 297 }
 298
 299
 300 /**
 301  * ap_handle_timer - Per STA timer handler
 302  * @eloop_ctx: struct hostapd_data *
 303  * @timeout_ctx: struct sta_info *
 304  *
 305  * This function is called to check station activity and to remove inactive
 306  * stations.
 307  */
 308 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 309 {
 310         struct hostapd_data *hapd = eloop_ctx;
 311         struct sta_info *sta = timeout_ctx;
 312         unsigned long next_time = 0;
 313         int reason;
 314
 315         wpa_printf(MSG_DEBUG, "%s: " MACSTR " flags=0x%x timeout_next=%d",
 316                    __func__, MAC2STR(sta->addr), sta->flags,
 317                    sta->timeout_next);
 318         if (sta->timeout_next == STA_REMOVE) {
 319                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 320                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 321                                "local deauth request");
 322                 ap_free_sta(hapd, sta);
 323                 return;
 324         }
 325
 326         if ((sta->flags & WLAN_STA_ASSOC) &&
 327             (sta->timeout_next == STA_NULLFUNC ||
 328              sta->timeout_next == STA_DISASSOC)) {
 329                 int inactive_sec;
 330                 /*
 331                  * Add random value to timeout so that we don't end up bouncing
 332                  * all stations at the same time if we have lots of associated
 333                  * stations that are idle (but keep re-associating).
 334                  */
 335                 int fuzz = os_random() % 20;
 336                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 337                 if (inactive_sec == -1) {
 338                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 339                                 "Check inactivity: Could not "
 340                                 "get station info from kernel driver for "
 341                                 MACSTR, MAC2STR(sta->addr));
 342                         /*
 343                          * The driver may not support this functionality.
 344                          * Anyway, try again after the next inactivity timeout,
 345                          * but do not disconnect the station now.
 346                          */
 347                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 348                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 349                            sta->flags & WLAN_STA_ASSOC) {
 350                         /* station activity detected; reset timeout state */
 351                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 352                                 "Station " MACSTR " has been active %is ago",
 353                                 MAC2STR(sta->addr), inactive_sec);
 354                         sta->timeout_next = STA_NULLFUNC;
 355                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 356                                 inactive_sec;
 357                 } else {
 358                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 359                                 "Station " MACSTR " has been "
 360                                 "inactive too long: %d sec, max allowed: %d",
 361                                 MAC2STR(sta->addr), inactive_sec,
 362                                 hapd->conf->ap_max_inactivity);
 363
 364                         if (hapd->conf->skip_inactivity_poll)
 365                                 sta->timeout_next = STA_DISASSOC;
 366                 }
 367         }
 368
 369         if ((sta->flags & WLAN_STA_ASSOC) &&
 370             sta->timeout_next == STA_DISASSOC &&
 371             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 372             !hapd->conf->skip_inactivity_poll) {
 373                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 374                         " has ACKed data poll", MAC2STR(sta->addr));
 375                 /* data nullfunc frame poll did not produce TX errors; assume
 376                  * station ACKed it */
 377                 sta->timeout_next = STA_NULLFUNC;
 378                 next_time = hapd->conf->ap_max_inactivity;
 379         }
 380
 381         if (next_time) {
 382                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 383                            "for " MACSTR " (%lu seconds)",
 384                            __func__, MAC2STR(sta->addr), next_time);
 385                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 386                                        sta);
 387                 return;
 388         }
 389
 390         if (sta->timeout_next == STA_NULLFUNC &&
 391             (sta->flags & WLAN_STA_ASSOC)) {
 392                 wpa_printf(MSG_DEBUG, "  Polling STA");
 393                 sta->flags |= WLAN_STA_PENDING_POLL;
 394                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 395                                         sta->flags & WLAN_STA_WMM);
 396         } else if (sta->timeout_next != STA_REMOVE) {
 397                 int deauth = sta->timeout_next == STA_DEAUTH;
 398
 399                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 400                         "Timeout, sending %s info to STA " MACSTR,
 401                         deauth ? "deauthentication" : "disassociation",
 402                         MAC2STR(sta->addr));
 403
 404                 if (deauth) {
 405                         hostapd_drv_sta_deauth(
 406                                 hapd, sta->addr,
 407                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 408                 } else {
 409                         reason = (sta->timeout_next == STA_DISASSOC) ?
 410                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 411                                 WLAN_REASON_PREV_AUTH_NOT_VALID;
 412
 413                         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
 414                 }
 415         }
 416
 417         switch (sta->timeout_next) {
 418         case STA_NULLFUNC:
 419                 sta->timeout_next = STA_DISASSOC;
 420                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 421                            "for " MACSTR " (%d seconds - AP_DISASSOC_DELAY)",
 422                            __func__, MAC2STR(sta->addr), AP_DISASSOC_DELAY);
 423                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 424                                        hapd, sta);
 425                 break;
 426         case STA_DISASSOC:
 427         case STA_DISASSOC_FROM_CLI:
 428                 ap_sta_set_authorized(hapd, sta, 0);
 429                 sta->flags &= ~WLAN_STA_ASSOC;
 430                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 431                 if (!sta->acct_terminate_cause)
 432                         sta->acct_terminate_cause =
 433                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 434                 accounting_sta_stop(hapd, sta);
 435                 ieee802_1x_free_station(sta);
 436                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 437                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 438                                "inactivity");
 439                 reason = (sta->timeout_next == STA_DISASSOC) ?
 440                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 441                         WLAN_REASON_PREV_AUTH_NOT_VALID;
 442                 sta->timeout_next = STA_DEAUTH;
 443                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 444                            "for " MACSTR " (%d seconds - AP_DEAUTH_DELAY)",
 445                            __func__, MAC2STR(sta->addr), AP_DEAUTH_DELAY);
 446                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 447                                        hapd, sta);
 448                 mlme_disassociate_indication(hapd, sta, reason);
 449                 break;
 450         case STA_DEAUTH:
 451         case STA_REMOVE:
 452                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 453                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 454                                "inactivity (timer DEAUTH/REMOVE)");
 455                 if (!sta->acct_terminate_cause)
 456                         sta->acct_terminate_cause =
 457                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 458                 mlme_deauthenticate_indication(
 459                         hapd, sta,
 460                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 461                 ap_free_sta(hapd, sta);
 462                 break;
 463         }
 464 }
 465
 466
 467 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 468 {
 469         struct hostapd_data *hapd = eloop_ctx;
 470         struct sta_info *sta = timeout_ctx;
 471         u8 addr[ETH_ALEN];
 472
 473         if (!(sta->flags & WLAN_STA_AUTH)) {
 474                 if (sta->flags & WLAN_STA_GAS) {
 475                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 476                                    "entry " MACSTR, MAC2STR(sta->addr));
 477                         ap_free_sta(hapd, sta);
 478                 }
 479                 return;
 480         }
 481
 482         mlme_deauthenticate_indication(hapd, sta,
 483                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 484         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 485                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 486                        "session timeout");
 487         sta->acct_terminate_cause =
 488                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 489         os_memcpy(addr, sta->addr, ETH_ALEN);
 490         ap_free_sta(hapd, sta);
 491         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 492 }
 493
 494
 495 void ap_sta_replenish_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 496                               u32 session_timeout)
 497 {
 498         if (eloop_replenish_timeout(session_timeout, 0,
 499                                     ap_handle_session_timer, hapd, sta) == 1) {
 500                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 501                                HOSTAPD_LEVEL_DEBUG, "setting session timeout "
 502                                "to %d seconds", session_timeout);
 503         }
 504 }
 505
 506
 507 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 508                             u32 session_timeout)
 509 {
 510         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 511                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 512                        "seconds", session_timeout);
 513         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 514         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 515                                hapd, sta);
 516 }
 517
 518
 519 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 520 {
 521         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 522 }
 523
 524
 525 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 526 {
 527         struct sta_info *sta;
 528
 529         sta = ap_get_sta(hapd, addr);
 530         if (sta)
 531                 return sta;
 532
 533         wpa_printf(MSG_DEBUG, "  New STA");
 534         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 535                 /* FIX: might try to remove some old STAs first? */
 536                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 537                            hapd->num_sta, hapd->conf->max_num_sta);
 538                 return NULL;
 539         }
 540
 541         sta = os_zalloc(sizeof(struct sta_info));
 542         if (sta == NULL) {
 543                 wpa_printf(MSG_ERROR, "malloc failed");
 544                 return NULL;
 545         }
 546         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 547         accounting_sta_get_id(hapd, sta);
 548
 549         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
 550                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 551                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
 552                            __func__, MAC2STR(addr),
 553                            hapd->conf->ap_max_inactivity);
 554                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 555                                        ap_handle_timer, hapd, sta);
 556         }
 557
 558         /* initialize STA info data */
 559         os_memcpy(sta->addr, addr, ETH_ALEN);
 560         sta->next = hapd->sta_list;
 561         hapd->sta_list = sta;
 562         hapd->num_sta++;
 563         ap_sta_hash_add(hapd, sta);
 564         sta->ssid = &hapd->conf->ssid;
 565         ap_sta_remove_in_other_bss(hapd, sta);
 566
 567         return sta;
 568 }
 569
 570
 571 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 572 {
 573         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 574
 575         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 576                    MAC2STR(sta->addr));
 577         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 578             sta->flags & WLAN_STA_ASSOC) {
 579                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 580                            " from kernel driver.", MAC2STR(sta->addr));
 581                 return -1;
 582         }
 583         return 0;
 584 }
 585
 586
 587 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 588                                        struct sta_info *sta)
 589 {
 590         struct hostapd_iface *iface = hapd->iface;
 591         size_t i;
 592
 593         for (i = 0; i < iface->num_bss; i++) {
 594                 struct hostapd_data *bss = iface->bss[i];
 595                 struct sta_info *sta2;
 596                 /* bss should always be set during operation, but it may be
 597                  * NULL during reconfiguration. Assume the STA is not
 598                  * associated to another BSS in that case to avoid NULL pointer
 599                  * dereferences. */
 600                 if (bss == hapd || bss == NULL)
 601                         continue;
 602                 sta2 = ap_get_sta(bss, sta->addr);
 603                 if (!sta2)
 604                         continue;
 605
 606                 ap_sta_disconnect(bss, sta2, sta2->addr,
 607                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 608         }
 609 }
 610
 611
 612 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 613 {
 614         struct hostapd_data *hapd = eloop_ctx;
 615         struct sta_info *sta = timeout_ctx;
 616
 617         ap_sta_remove(hapd, sta);
 618         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 619 }
 620
 621
 622 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 623                          u16 reason)
 624 {
 625         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 626                    hapd->conf->iface, MAC2STR(sta->addr));
 627         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
 628         ap_sta_set_authorized(hapd, sta, 0);
 629         sta->timeout_next = STA_DEAUTH;
 630         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 631                    "for " MACSTR " (%d seconds - "
 632                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 633                    __func__, MAC2STR(sta->addr),
 634                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 635         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 636         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 637                                ap_handle_timer, hapd, sta);
 638         accounting_sta_stop(hapd, sta);
 639         ieee802_1x_free_station(sta);
 640
 641         sta->disassoc_reason = reason;
 642         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 643         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 644         eloop_register_timeout(hapd->iface->drv_flags &
 645                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 646                                ap_sta_disassoc_cb_timeout, hapd, sta);
 647 }
 648
 649
 650 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 651 {
 652         struct hostapd_data *hapd = eloop_ctx;
 653         struct sta_info *sta = timeout_ctx;
 654
 655         ap_sta_remove(hapd, sta);
 656         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 657 }
 658
 659
 660 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 661                            u16 reason)
 662 {
 663         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 664                    hapd->conf->iface, MAC2STR(sta->addr));
 665         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 666         ap_sta_set_authorized(hapd, sta, 0);
 667         sta->timeout_next = STA_REMOVE;
 668         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 669                    "for " MACSTR " (%d seconds - "
 670                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 671                    __func__, MAC2STR(sta->addr),
 672                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 673         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 674         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 675                                ap_handle_timer, hapd, sta);
 676         accounting_sta_stop(hapd, sta);
 677         ieee802_1x_free_station(sta);
 678
 679         sta->deauth_reason = reason;
 680         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 681         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 682         eloop_register_timeout(hapd->iface->drv_flags &
 683                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 684                                ap_sta_deauth_cb_timeout, hapd, sta);
 685 }
 686
 687
 688 #ifdef CONFIG_WPS
 689 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 690                       struct sta_info *sta, void *ctx)
 691 {
 692         if (sta && (sta->flags & WLAN_STA_WPS)) {
 693                 ap_sta_deauthenticate(hapd, sta,
 694                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 695                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 696                            __func__, MAC2STR(sta->addr));
 697                 return 1;
 698         }
 699
 700         return 0;
 701 }
 702 #endif /* CONFIG_WPS */
 703
 704
 705 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 706                      int old_vlanid)
 707 {
 708 #ifndef CONFIG_NO_VLAN
 709         const char *iface;
 710         struct hostapd_vlan *vlan = NULL;
 711         int ret;
 712
 713         /*
 714          * Do not proceed furthur if the vlan id remains same. We do not want
 715          * duplicate dynamic vlan entries.
 716          */
 717         if (sta->vlan_id == old_vlanid)
 718                 return 0;
 719
 720         /*
 721          * During 1x reauth, if the vlan id changes, then remove the old id and
 722          * proceed furthur to add the new one.
 723          */
 724         if (old_vlanid > 0)
 725                 vlan_remove_dynamic(hapd, old_vlanid);
 726
 727         iface = hapd->conf->iface;
 728         if (sta->ssid->vlan[0])
 729                 iface = sta->ssid->vlan;
 730
 731         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 732                 sta->vlan_id = 0;
 733         else if (sta->vlan_id > 0) {
 734                 struct hostapd_vlan *wildcard_vlan = NULL;
 735                 vlan = hapd->conf->vlan;
 736                 while (vlan) {
 737                         if (vlan->vlan_id == sta->vlan_id)
 738                                 break;
 739                         if (vlan->vlan_id == VLAN_ID_WILDCARD)
 740                                 wildcard_vlan = vlan;
 741                         vlan = vlan->next;
 742                 }
 743                 if (!vlan)
 744                         vlan = wildcard_vlan;
 745                 if (vlan)
 746                         iface = vlan->ifname;
 747         }
 748
 749         if (sta->vlan_id > 0 && vlan == NULL) {
 750                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 751                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 752                                "binding station to (vlan_id=%d)",
 753                                sta->vlan_id);
 754                 return -1;
 755         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 756                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 757                 if (vlan == NULL) {
 758                         hostapd_logger(hapd, sta->addr,
 759                                        HOSTAPD_MODULE_IEEE80211,
 760                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 761                                        "dynamic VLAN interface for vlan_id=%d",
 762                                        sta->vlan_id);
 763                         return -1;
 764                 }
 765
 766                 iface = vlan->ifname;
 767                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 768                         hostapd_logger(hapd, sta->addr,
 769                                        HOSTAPD_MODULE_IEEE80211,
 770                                        HOSTAPD_LEVEL_DEBUG, "could not "
 771                                        "configure encryption for dynamic VLAN "
 772                                        "interface for vlan_id=%d",
 773                                        sta->vlan_id);
 774                 }
 775
 776                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 777                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 778                                "interface '%s'", iface);
 779         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 780                 if (sta->vlan_id > 0) {
 781                         vlan->dynamic_vlan++;
 782                         hostapd_logger(hapd, sta->addr,
 783                                        HOSTAPD_MODULE_IEEE80211,
 784                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 785                                        "dynamic VLAN interface '%s'", iface);
 786                 }
 787
 788                 /*
 789                  * Update encryption configuration for statically generated
 790                  * VLAN interface. This is only used for static WEP
 791                  * configuration for the case where hostapd did not yet know
 792                  * which keys are to be used when the interface was added.
 793                  */
 794                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 795                         hostapd_logger(hapd, sta->addr,
 796                                        HOSTAPD_MODULE_IEEE80211,
 797                                        HOSTAPD_LEVEL_DEBUG, "could not "
 798                                        "configure encryption for VLAN "
 799                                        "interface for vlan_id=%d",
 800                                        sta->vlan_id);
 801                 }
 802         }
 803
 804         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 805                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 806                        "'%s'", iface);
 807
 808         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 809                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 810
 811         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 812         if (ret < 0) {
 813                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 814                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 815                                "entry to vlan_id=%d", sta->vlan_id);
 816         }
 817         return ret;
 818 #else /* CONFIG_NO_VLAN */
 819         return 0;
 820 #endif /* CONFIG_NO_VLAN */
 821 }
 822
 823
 824 #ifdef CONFIG_IEEE80211W
 825
 826 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 827 {
 828         u32 tu;
 829         struct os_reltime now, passed;
 830         os_get_reltime(&now);
 831         os_reltime_sub(&now, &sta->sa_query_start, &passed);
 832         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 833         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 834                 hostapd_logger(hapd, sta->addr,
 835                                HOSTAPD_MODULE_IEEE80211,
 836                                HOSTAPD_LEVEL_DEBUG,
 837                                "association SA Query timed out");
 838                 sta->sa_query_timed_out = 1;
 839                 os_free(sta->sa_query_trans_id);
 840                 sta->sa_query_trans_id = NULL;
 841                 sta->sa_query_count = 0;
 842                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 843                 return 1;
 844         }
 845
 846         return 0;
 847 }
 848
 849
 850 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 851 {
 852         struct hostapd_data *hapd = eloop_ctx;
 853         struct sta_info *sta = timeout_ctx;
 854         unsigned int timeout, sec, usec;
 855         u8 *trans_id, *nbuf;
 856
 857         if (sta->sa_query_count > 0 &&
 858             ap_check_sa_query_timeout(hapd, sta))
 859                 return;
 860
 861         nbuf = os_realloc_array(sta->sa_query_trans_id,
 862                                 sta->sa_query_count + 1,
 863                                 WLAN_SA_QUERY_TR_ID_LEN);
 864         if (nbuf == NULL)
 865                 return;
 866         if (sta->sa_query_count == 0) {
 867                 /* Starting a new SA Query procedure */
 868                 os_get_reltime(&sta->sa_query_start);
 869         }
 870         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 871         sta->sa_query_trans_id = nbuf;
 872         sta->sa_query_count++;
 873
 874         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 875
 876         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 877         sec = ((timeout / 1000) * 1024) / 1000;
 878         usec = (timeout % 1000) * 1024;
 879         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 880
 881         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 882                        HOSTAPD_LEVEL_DEBUG,
 883                        "association SA Query attempt %d", sta->sa_query_count);
 884
 885         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 886 }
 887
 888
 889 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 890 {
 891         ap_sa_query_timer(hapd, sta);
 892 }
 893
 894
 895 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 896 {
 897         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 898         os_free(sta->sa_query_trans_id);
 899         sta->sa_query_trans_id = NULL;
 900         sta->sa_query_count = 0;
 901 }
 902
 903 #endif /* CONFIG_IEEE80211W */
 904
 905
 906 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 907                            int authorized)
 908 {
 909         const u8 *dev_addr = NULL;
 910         char buf[100];
 911 #ifdef CONFIG_P2P
 912         u8 addr[ETH_ALEN];
 913         u8 ip_addr_buf[4];
 914 #endif /* CONFIG_P2P */
 915
 916         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 917                 return;
 918
 919 #ifdef CONFIG_P2P
 920         if (hapd->p2p_group == NULL) {
 921                 if (sta->p2p_ie != NULL &&
 922                     p2p_parse_dev_addr_in_p2p_ie(sta->p2p_ie, addr) == 0)
 923                         dev_addr = addr;
 924         } else
 925                 dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 926 #endif /* CONFIG_P2P */
 927
 928         if (dev_addr)
 929                 os_snprintf(buf, sizeof(buf), MACSTR " p2p_dev_addr=" MACSTR,
 930                             MAC2STR(sta->addr), MAC2STR(dev_addr));
 931         else
 932                 os_snprintf(buf, sizeof(buf), MACSTR, MAC2STR(sta->addr));
 933
 934         if (authorized) {
 935                 char ip_addr[100];
 936                 ip_addr[0] = '\0';
 937 #ifdef CONFIG_P2P
 938                 if (wpa_auth_get_ip_addr(sta->wpa_sm, ip_addr_buf) == 0) {
 939                         os_snprintf(ip_addr, sizeof(ip_addr),
 940                                     " ip_addr=%u.%u.%u.%u",
 941                                     ip_addr_buf[0], ip_addr_buf[1],
 942                                     ip_addr_buf[2], ip_addr_buf[3]);
 943                 }
 944 #endif /* CONFIG_P2P */
 945
 946                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s%s",
 947                         buf, ip_addr);
 948
 949                 if (hapd->msg_ctx_parent &&
 950                     hapd->msg_ctx_parent != hapd->msg_ctx)
 951                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 952                                           AP_STA_CONNECTED "%s%s",
 953                                           buf, ip_addr);
 954
 955                 sta->flags |= WLAN_STA_AUTHORIZED;
 956         } else {
 957                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED "%s", buf);
 958
 959                 if (hapd->msg_ctx_parent &&
 960                     hapd->msg_ctx_parent != hapd->msg_ctx)
 961                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 962                                           AP_STA_DISCONNECTED "%s", buf);
 963
 964                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 965         }
 966
 967         if (hapd->sta_authorized_cb)
 968                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 969                                         sta->addr, authorized, dev_addr);
 970 }
 971
 972
 973 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
 974                        const u8 *addr, u16 reason)
 975 {
 976
 977         if (sta == NULL && addr)
 978                 sta = ap_get_sta(hapd, addr);
 979
 980         if (addr)
 981                 hostapd_drv_sta_deauth(hapd, addr, reason);
 982
 983         if (sta == NULL)
 984                 return;
 985         ap_sta_set_authorized(hapd, sta, 0);
 986         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
 987         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 988         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 989         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 990                    "for " MACSTR " (%d seconds - "
 991                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 992                    __func__, MAC2STR(sta->addr),
 993                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 994         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 995         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 996                                ap_handle_timer, hapd, sta);
 997         sta->timeout_next = STA_REMOVE;
 998
 999         sta->deauth_reason = reason;
1000         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
1001         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1002         eloop_register_timeout(hapd->iface->drv_flags &
1003                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
1004                                ap_sta_deauth_cb_timeout, hapd, sta);
1005 }
1006
1007
1008 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
1009 {
1010         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
1011                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
1012                 return;
1013         }
1014         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
1015         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1016         ap_sta_deauth_cb_timeout(hapd, sta);
1017 }
1018
1019
1020 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
1021 {
1022         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
1023                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
1024                 return;
1025         }
1026         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
1027         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
1028         ap_sta_disassoc_cb_timeout(hapd, sta);
1029 }
1030
1031
1032 int ap_sta_flags_txt(u32 flags, char *buf, size_t buflen)
1033 {
1034         int res;
1035
1036         buf[0] = '\0';
1037         res = os_snprintf(buf, buflen, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1038                           (flags & WLAN_STA_AUTH ? "[AUTH]" : ""),
1039                           (flags & WLAN_STA_ASSOC ? "[ASSOC]" : ""),
1040                           (flags & WLAN_STA_AUTHORIZED ? "[AUTHORIZED]" : ""),
1041                           (flags & WLAN_STA_PENDING_POLL ? "[PENDING_POLL" :
1042                            ""),
1043                           (flags & WLAN_STA_SHORT_PREAMBLE ?
1044                            "[SHORT_PREAMBLE]" : ""),
1045                           (flags & WLAN_STA_PREAUTH ? "[PREAUTH]" : ""),
1046                           (flags & WLAN_STA_WMM ? "[WMM]" : ""),
1047                           (flags & WLAN_STA_MFP ? "[MFP]" : ""),
1048                           (flags & WLAN_STA_WPS ? "[WPS]" : ""),
1049                           (flags & WLAN_STA_MAYBE_WPS ? "[MAYBE_WPS]" : ""),
1050                           (flags & WLAN_STA_WDS ? "[WDS]" : ""),
1051                           (flags & WLAN_STA_NONERP ? "[NonERP]" : ""),
1052                           (flags & WLAN_STA_WPS2 ? "[WPS2]" : ""),
1053                           (flags & WLAN_STA_GAS ? "[GAS]" : ""),
1054                           (flags & WLAN_STA_VHT ? "[VHT]" : ""),
1055                           (flags & WLAN_STA_WNM_SLEEP_MODE ?
1056                            "[WNM_SLEEP_MODE]" : ""));
1057
1058         return res;
1059 }