git.maemo.org Git - wpasupplicant/blob - hostapd/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2007-2008, Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #include "includes.h"
  17
  18 #include "hostapd.h"
  19 #include "sta_info.h"
  20 #include "eloop.h"
  21 #include "accounting.h"
  22 #include "ieee802_1x.h"
  23 #include "ieee802_11.h"
  24 #include "radius/radius.h"
  25 #include "wpa.h"
  26 #include "preauth.h"
  27 #include "radius/radius_client.h"
  28 #include "driver.h"
  29 #include "beacon.h"
  30 #include "hw_features.h"
  31 #include "mlme.h"
  32 #include "vlan_init.h"
  33
  34 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
  35                                struct sta_info *sta, u32 flags);
  36 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  37 #ifdef CONFIG_IEEE80211W
  38 static void ap_ping_timer(void *eloop_ctx, void *timeout_ctx);
  39 #endif /* CONFIG_IEEE80211W */
  40
  41 int ap_for_each_sta(struct hostapd_data *hapd,
  42                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  43                               void *ctx),
  44                     void *ctx)
  45 {
  46         struct sta_info *sta;
  47
  48         for (sta = hapd->sta_list; sta; sta = sta->next) {
  49                 if (cb(hapd, sta, ctx))
  50                         return 1;
  51         }
  52
  53         return 0;
  54 }
  55
  56
  57 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  58 {
  59         struct sta_info *s;
  60
  61         s = hapd->sta_hash[STA_HASH(sta)];
  62         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  63                 s = s->hnext;
  64         return s;
  65 }
  66
  67
  68 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  69 {
  70         struct sta_info *tmp;
  71
  72         if (hapd->sta_list == sta) {
  73                 hapd->sta_list = sta->next;
  74                 return;
  75         }
  76
  77         tmp = hapd->sta_list;
  78         while (tmp != NULL && tmp->next != sta)
  79                 tmp = tmp->next;
  80         if (tmp == NULL) {
  81                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
  82                            "list.", MAC2STR(sta->addr));
  83         } else
  84                 tmp->next = sta->next;
  85 }
  86
  87
  88 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
  89 {
  90         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
  91         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
  92 }
  93
  94
  95 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
  96 {
  97         struct sta_info *s;
  98
  99         s = hapd->sta_hash[STA_HASH(sta->addr)];
 100         if (s == NULL) return;
 101         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 102                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 103                 return;
 104         }
 105
 106         while (s->hnext != NULL &&
 107                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 108                 s = s->hnext;
 109         if (s->hnext != NULL)
 110                 s->hnext = s->hnext->hnext;
 111         else
 112                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 113                            " from hash table", MAC2STR(sta->addr));
 114 }
 115
 116
 117 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 118 {
 119         int set_beacon = 0;
 120
 121         accounting_sta_stop(hapd, sta);
 122
 123         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC) &&
 124             !(sta->flags & WLAN_STA_PREAUTH))
 125                 hostapd_sta_remove(hapd, sta->addr);
 126
 127         ap_sta_hash_del(hapd, sta);
 128         ap_sta_list_del(hapd, sta);
 129
 130         if (sta->aid > 0)
 131                 hapd->sta_aid[sta->aid - 1] = NULL;
 132
 133         hapd->num_sta--;
 134         if (sta->nonerp_set) {
 135                 sta->nonerp_set = 0;
 136                 hapd->iface->num_sta_non_erp--;
 137                 if (hapd->iface->num_sta_non_erp == 0)
 138                         set_beacon++;
 139         }
 140
 141         if (sta->no_short_slot_time_set) {
 142                 sta->no_short_slot_time_set = 0;
 143                 hapd->iface->num_sta_no_short_slot_time--;
 144                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 145                     && hapd->iface->num_sta_no_short_slot_time == 0)
 146                         set_beacon++;
 147         }
 148
 149         if (sta->no_short_preamble_set) {
 150                 sta->no_short_preamble_set = 0;
 151                 hapd->iface->num_sta_no_short_preamble--;
 152                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 153                     && hapd->iface->num_sta_no_short_preamble == 0)
 154                         set_beacon++;
 155         }
 156
 157 #ifdef CONFIG_IEEE80211N
 158         if (sta->flags & WLAN_STA_HT) {
 159                 u16 ht_capab = le_to_host16(
 160                         sta->ht_capabilities.data.capabilities_info);
 161                 if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0)
 162                         hapd->iface->num_sta_ht_no_gf--;
 163                 if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0)
 164                         hapd->iface->num_sta_ht_20mhz--;
 165         } else
 166                 hapd->iface->num_sta_no_ht--;
 167
 168         if (hostapd_ht_operation_update(hapd->iface) > 0)
 169                 set_beacon++;
 170 #endif /* CONFIG_IEEE80211N */
 171
 172         if (set_beacon)
 173                 ieee802_11_set_beacons(hapd->iface);
 174
 175         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 176         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 177
 178         ieee802_1x_free_station(sta);
 179         wpa_auth_sta_deinit(sta->wpa_sm);
 180         rsn_preauth_free_station(hapd, sta);
 181         radius_client_flush_auth(hapd->radius, sta->addr);
 182
 183         os_free(sta->last_assoc_req);
 184         os_free(sta->challenge);
 185
 186 #ifdef CONFIG_IEEE80211W
 187         os_free(sta->ping_trans_id);
 188         eloop_cancel_timeout(ap_ping_timer, hapd, sta);
 189 #endif /* CONFIG_IEEE80211W */
 190
 191         wpabuf_free(sta->wps_ie);
 192
 193         os_free(sta);
 194 }
 195
 196
 197 void hostapd_free_stas(struct hostapd_data *hapd)
 198 {
 199         struct sta_info *sta, *prev;
 200
 201         sta = hapd->sta_list;
 202
 203         while (sta) {
 204                 prev = sta;
 205                 if (sta->flags & WLAN_STA_AUTH) {
 206                         mlme_deauthenticate_indication(
 207                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 208                 }
 209                 sta = sta->next;
 210                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 211                            MAC2STR(prev->addr));
 212                 ap_free_sta(hapd, prev);
 213         }
 214 }
 215
 216
 217 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 218 {
 219         struct hostapd_data *hapd = eloop_ctx;
 220         struct sta_info *sta = timeout_ctx;
 221         unsigned long next_time = 0;
 222
 223         if (sta->timeout_next == STA_REMOVE) {
 224                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 225                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 226                                "local deauth request");
 227                 ap_free_sta(hapd, sta);
 228                 return;
 229         }
 230
 231         if ((sta->flags & WLAN_STA_ASSOC) &&
 232             (sta->timeout_next == STA_NULLFUNC ||
 233              sta->timeout_next == STA_DISASSOC)) {
 234                 int inactive_sec;
 235                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
 236                            MAC2STR(sta->addr));
 237                 inactive_sec = hostapd_get_inact_sec(hapd, sta->addr);
 238                 if (inactive_sec == -1) {
 239                         wpa_printf(MSG_DEBUG, "Could not get station info "
 240                                    "from kernel driver for " MACSTR ".",
 241                                    MAC2STR(sta->addr));
 242                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 243                            sta->flags & WLAN_STA_ASSOC) {
 244                         /* station activity detected; reset timeout state */
 245                         wpa_printf(MSG_DEBUG, "  Station has been active");
 246                         sta->timeout_next = STA_NULLFUNC;
 247                         next_time = hapd->conf->ap_max_inactivity -
 248                                 inactive_sec;
 249                 }
 250         }
 251
 252         if ((sta->flags & WLAN_STA_ASSOC) &&
 253             sta->timeout_next == STA_DISASSOC &&
 254             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 255                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
 256                 /* data nullfunc frame poll did not produce TX errors; assume
 257                  * station ACKed it */
 258                 sta->timeout_next = STA_NULLFUNC;
 259                 next_time = hapd->conf->ap_max_inactivity;
 260         }
 261
 262         if (next_time) {
 263                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 264                                        sta);
 265                 return;
 266         }
 267
 268         if (sta->timeout_next == STA_NULLFUNC &&
 269             (sta->flags & WLAN_STA_ASSOC)) {
 270                 /* send data frame to poll STA and check whether this frame
 271                  * is ACKed */
 272                 struct ieee80211_hdr hdr;
 273
 274                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 275                 sta->flags |= WLAN_STA_PENDING_POLL;
 276
 277 #ifndef CONFIG_NATIVE_WINDOWS
 278                 /* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
 279                  * it is apparently not retried so TX Exc events are not
 280                  * received for it */
 281                 os_memset(&hdr, 0, sizeof(hdr));
 282                 hdr.frame_control =
 283                         IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 284                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 285                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 286                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 287                           ETH_ALEN);
 288                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 289
 290                 if (hostapd_send_mgmt_frame(hapd, &hdr, sizeof(hdr), 0) < 0)
 291                         perror("ap_handle_timer: send");
 292 #endif /* CONFIG_NATIVE_WINDOWS */
 293         } else if (sta->timeout_next != STA_REMOVE) {
 294                 int deauth = sta->timeout_next == STA_DEAUTH;
 295
 296                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 297                            deauth ? "deauthentication" : "disassociation",
 298                            MAC2STR(sta->addr));
 299
 300                 if (deauth) {
 301                         hostapd_sta_deauth(hapd, sta->addr,
 302                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 303                 } else {
 304                         hostapd_sta_disassoc(
 305                                 hapd, sta->addr,
 306                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 307                 }
 308         }
 309
 310         switch (sta->timeout_next) {
 311         case STA_NULLFUNC:
 312                 sta->timeout_next = STA_DISASSOC;
 313                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 314                                        hapd, sta);
 315                 break;
 316         case STA_DISASSOC:
 317                 sta->flags &= ~WLAN_STA_ASSOC;
 318                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 319                 if (!sta->acct_terminate_cause)
 320                         sta->acct_terminate_cause =
 321                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 322                 accounting_sta_stop(hapd, sta);
 323                 ieee802_1x_free_station(sta);
 324                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 325                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 326                                "inactivity");
 327                 sta->timeout_next = STA_DEAUTH;
 328                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 329                                        hapd, sta);
 330                 mlme_disassociate_indication(
 331                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 332                 break;
 333         case STA_DEAUTH:
 334         case STA_REMOVE:
 335                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 336                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 337                                "inactivity");
 338                 if (!sta->acct_terminate_cause)
 339                         sta->acct_terminate_cause =
 340                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 341                 mlme_deauthenticate_indication(
 342                         hapd, sta,
 343                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 344                 ap_free_sta(hapd, sta);
 345                 break;
 346         }
 347 }
 348
 349
 350 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 351 {
 352         struct hostapd_data *hapd = eloop_ctx;
 353         struct sta_info *sta = timeout_ctx;
 354         u8 addr[ETH_ALEN];
 355
 356         if (!(sta->flags & WLAN_STA_AUTH))
 357                 return;
 358
 359         mlme_deauthenticate_indication(hapd, sta,
 360                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 361         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 362                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 363                        "session timeout");
 364         sta->acct_terminate_cause =
 365                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 366         os_memcpy(addr, sta->addr, ETH_ALEN);
 367         ap_free_sta(hapd, sta);
 368         hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 369 }
 370
 371
 372 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 373                             u32 session_timeout)
 374 {
 375         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 376                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 377                        "seconds", session_timeout);
 378         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 379         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 380                                hapd, sta);
 381 }
 382
 383
 384 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 385 {
 386         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 387 }
 388
 389
 390 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 391 {
 392         struct sta_info *sta;
 393
 394         sta = ap_get_sta(hapd, addr);
 395         if (sta)
 396                 return sta;
 397
 398         wpa_printf(MSG_DEBUG, "  New STA");
 399         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 400                 /* FIX: might try to remove some old STAs first? */
 401                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 402                            hapd->num_sta, hapd->conf->max_num_sta);
 403                 return NULL;
 404         }
 405
 406         sta = os_zalloc(sizeof(struct sta_info));
 407         if (sta == NULL) {
 408                 wpa_printf(MSG_ERROR, "malloc failed");
 409                 return NULL;
 410         }
 411         sta->acct_interim_interval = hapd->conf->radius->acct_interim_interval;
 412
 413         /* initialize STA info data */
 414         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 415                                ap_handle_timer, hapd, sta);
 416         os_memcpy(sta->addr, addr, ETH_ALEN);
 417         sta->next = hapd->sta_list;
 418         hapd->sta_list = sta;
 419         hapd->num_sta++;
 420         ap_sta_hash_add(hapd, sta);
 421         sta->ssid = &hapd->conf->ssid;
 422
 423         return sta;
 424 }
 425
 426
 427 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 428 {
 429         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 430
 431         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 432                    MAC2STR(sta->addr));
 433         if (hostapd_sta_remove(hapd, sta->addr) &&
 434             sta->flags & WLAN_STA_ASSOC) {
 435                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 436                            " from kernel driver.", MAC2STR(sta->addr));
 437                 return -1;
 438         }
 439         return 0;
 440 }
 441
 442
 443 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
 444                                struct sta_info *sta, u32 flags)
 445 {
 446         struct hostapd_iface *iface = hapd->iface;
 447         size_t i;
 448
 449         for (i = 0; i < iface->num_bss; i++) {
 450                 struct hostapd_data *bss = iface->bss[i];
 451                 struct sta_info *sta2;
 452                 /* bss should always be set during operation, but it may be
 453                  * NULL during reconfiguration. Assume the STA is not
 454                  * associated to another BSS in that case to avoid NULL pointer
 455                  * dereferences. */
 456                 if (bss == hapd || bss == NULL)
 457                         continue;
 458                 sta2 = ap_get_sta(bss, sta->addr);
 459                 if (sta2 && ((sta2->flags & flags) == flags))
 460                         return 1;
 461         }
 462
 463         return 0;
 464 }
 465
 466
 467 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 468                          u16 reason)
 469 {
 470         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 471                    hapd->conf->iface, MAC2STR(sta->addr));
 472         sta->flags &= ~WLAN_STA_ASSOC;
 473         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 474                 ap_sta_remove(hapd, sta);
 475         sta->timeout_next = STA_DEAUTH;
 476         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 477         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 478                                ap_handle_timer, hapd, sta);
 479         accounting_sta_stop(hapd, sta);
 480         ieee802_1x_free_station(sta);
 481
 482         mlme_disassociate_indication(hapd, sta, reason);
 483 }
 484
 485
 486 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 487                            u16 reason)
 488 {
 489         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 490                    hapd->conf->iface, MAC2STR(sta->addr));
 491         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 492         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 493                 ap_sta_remove(hapd, sta);
 494         sta->timeout_next = STA_REMOVE;
 495         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 496         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 497                                ap_handle_timer, hapd, sta);
 498         accounting_sta_stop(hapd, sta);
 499         ieee802_1x_free_station(sta);
 500
 501         mlme_deauthenticate_indication(hapd, sta, reason);
 502 }
 503
 504
 505 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 506                      int old_vlanid)
 507 {
 508         const char *iface;
 509         struct hostapd_vlan *vlan = NULL;
 510
 511         /*
 512          * Do not proceed furthur if the vlan id remains same. We do not want
 513          * duplicate dynamic vlan entries.
 514          */
 515         if (sta->vlan_id == old_vlanid)
 516                 return 0;
 517
 518         /*
 519          * During 1x reauth, if the vlan id changes, then remove the old id and
 520          * proceed furthur to add the new one.
 521          */
 522         if (old_vlanid > 0)
 523                 vlan_remove_dynamic(hapd, old_vlanid);
 524
 525         iface = hapd->conf->iface;
 526         if (sta->ssid->vlan[0])
 527                 iface = sta->ssid->vlan;
 528
 529         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 530                 sta->vlan_id = 0;
 531         else if (sta->vlan_id > 0) {
 532                 vlan = hapd->conf->vlan;
 533                 while (vlan) {
 534                         if (vlan->vlan_id == sta->vlan_id ||
 535                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 536                                 iface = vlan->ifname;
 537                                 break;
 538                         }
 539                         vlan = vlan->next;
 540                 }
 541         }
 542
 543         if (sta->vlan_id > 0 && vlan == NULL) {
 544                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 545                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 546                                "binding station to (vlan_id=%d)",
 547                                sta->vlan_id);
 548                 return -1;
 549         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 550                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 551                 if (vlan == NULL) {
 552                         hostapd_logger(hapd, sta->addr,
 553                                        HOSTAPD_MODULE_IEEE80211,
 554                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 555                                        "dynamic VLAN interface for vlan_id=%d",
 556                                        sta->vlan_id);
 557                         return -1;
 558                 }
 559
 560                 iface = vlan->ifname;
 561                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 562                         hostapd_logger(hapd, sta->addr,
 563                                        HOSTAPD_MODULE_IEEE80211,
 564                                        HOSTAPD_LEVEL_DEBUG, "could not "
 565                                        "configure encryption for dynamic VLAN "
 566                                        "interface for vlan_id=%d",
 567                                        sta->vlan_id);
 568                 }
 569
 570                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 571                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 572                                "interface '%s'", iface);
 573         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 574                 if (sta->vlan_id > 0) {
 575                         vlan->dynamic_vlan++;
 576                         hostapd_logger(hapd, sta->addr,
 577                                        HOSTAPD_MODULE_IEEE80211,
 578                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 579                                        "dynamic VLAN interface '%s'", iface);
 580                 }
 581
 582                 /*
 583                  * Update encryption configuration for statically generated
 584                  * VLAN interface. This is only used for static WEP
 585                  * configuration for the case where hostapd did not yet know
 586                  * which keys are to be used when the interface was added.
 587                  */
 588                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 589                         hostapd_logger(hapd, sta->addr,
 590                                        HOSTAPD_MODULE_IEEE80211,
 591                                        HOSTAPD_LEVEL_DEBUG, "could not "
 592                                        "configure encryption for VLAN "
 593                                        "interface for vlan_id=%d",
 594                                        sta->vlan_id);
 595                 }
 596         }
 597
 598         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 599                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 600                        "'%s'", iface);
 601
 602         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 603                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 604
 605         return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 606 }
 607
 608
 609 #ifdef CONFIG_IEEE80211W
 610
 611 /* MLME-PING.request */
 612 static void ieee802_11_send_ping_req(struct hostapd_data *hapd, const u8 *addr,
 613                                      const u8 *trans_id)
 614 {
 615         struct ieee80211_mgmt mgmt;
 616         u8 *end;
 617
 618         os_memset(&mgmt, 0, sizeof(mgmt));
 619         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 620                                           WLAN_FC_STYPE_ACTION);
 621         os_memcpy(mgmt.da, addr, ETH_ALEN);
 622         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 623         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 624         mgmt.u.action.category = WLAN_ACTION_PING;
 625         mgmt.u.action.u.ping_req.action = WLAN_PING_REQUEST;
 626         os_memcpy(mgmt.u.action.u.ping_req.trans_id, trans_id,
 627                   WLAN_PING_TRANS_ID_LEN);
 628         end = mgmt.u.action.u.ping_req.trans_id + WLAN_PING_TRANS_ID_LEN;
 629         if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
 630                                     end - (u8 *) &mgmt, 0) < 0)
 631                 perror("ieee802_11_send_ping_req: send");
 632 }
 633
 634
 635 static void ap_ping_timer(void *eloop_ctx, void *timeout_ctx)
 636 {
 637         struct hostapd_data *hapd = eloop_ctx;
 638         struct sta_info *sta = timeout_ctx;
 639         unsigned int timeout, sec, usec;
 640         u8 *trans_id, *nbuf;
 641
 642         if (sta->ping_count >= hapd->conf->assoc_ping_attempts) {
 643                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 644                                HOSTAPD_LEVEL_DEBUG,
 645                                "association ping timed out");
 646                 sta->ping_timed_out = 1;
 647                 os_free(sta->ping_trans_id);
 648                 sta->ping_trans_id = NULL;
 649                 sta->ping_count = 0;
 650                 return;
 651         }
 652
 653         nbuf = os_realloc(sta->ping_trans_id,
 654                           (sta->ping_count + 1) * WLAN_PING_TRANS_ID_LEN);
 655         if (nbuf == NULL)
 656                 return;
 657         trans_id = nbuf + sta->ping_count * WLAN_PING_TRANS_ID_LEN;
 658         sta->ping_trans_id = nbuf;
 659         sta->ping_count++;
 660
 661         os_get_random(trans_id, WLAN_PING_TRANS_ID_LEN);
 662
 663         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 664                        HOSTAPD_LEVEL_DEBUG,
 665                        "association ping attempt %d", sta->ping_count);
 666
 667         ieee802_11_send_ping_req(hapd, sta->addr, trans_id);
 668
 669         timeout = hapd->conf->assoc_ping_timeout;
 670         sec = ((timeout / 1000) * 1024) / 1000;
 671         usec = (timeout % 1000) * 1024;
 672         eloop_register_timeout(sec, usec, ap_ping_timer, hapd, sta);
 673 }
 674
 675
 676 void ap_sta_start_ping(struct hostapd_data *hapd, struct sta_info *sta)
 677 {
 678         ap_ping_timer(hapd, sta);
 679 }
 680
 681
 682 void ap_sta_stop_ping(struct hostapd_data *hapd, struct sta_info *sta)
 683 {
 684         eloop_cancel_timeout(ap_ping_timer, hapd, sta);
 685         os_free(sta->ping_trans_id);
 686         sta->ping_trans_id = NULL;
 687         sta->ping_count = 0;
 688 }
 689
 690 #endif /* CONFIG_IEEE80211W */