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                 if ((sta->ht_capabilities.data.capabilities_info &
 160                      HT_CAP_INFO_GREEN_FIELD) == 0)
 161                         hapd->iface->num_sta_ht_no_gf--;
 162                 if ((sta->ht_capabilities.data.capabilities_info &
 163                      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         os_free(sta);
 192 }
 193
 194
 195 void hostapd_free_stas(struct hostapd_data *hapd)
 196 {
 197         struct sta_info *sta, *prev;
 198
 199         sta = hapd->sta_list;
 200
 201         while (sta) {
 202                 prev = sta;
 203                 if (sta->flags & WLAN_STA_AUTH) {
 204                         mlme_deauthenticate_indication(
 205                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 206                 }
 207                 sta = sta->next;
 208                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 209                            MAC2STR(prev->addr));
 210                 ap_free_sta(hapd, prev);
 211         }
 212 }
 213
 214
 215 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 216 {
 217         struct hostapd_data *hapd = eloop_ctx;
 218         struct sta_info *sta = timeout_ctx;
 219         unsigned long next_time = 0;
 220
 221         if (sta->timeout_next == STA_REMOVE) {
 222                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 223                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 224                                "local deauth request");
 225                 ap_free_sta(hapd, sta);
 226                 return;
 227         }
 228
 229         if ((sta->flags & WLAN_STA_ASSOC) &&
 230             (sta->timeout_next == STA_NULLFUNC ||
 231              sta->timeout_next == STA_DISASSOC)) {
 232                 int inactive_sec;
 233                 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
 234                            MAC2STR(sta->addr));
 235                 inactive_sec = hostapd_get_inact_sec(hapd, sta->addr);
 236                 if (inactive_sec == -1) {
 237                         wpa_printf(MSG_DEBUG, "Could not get station info "
 238                                    "from kernel driver for " MACSTR ".",
 239                                    MAC2STR(sta->addr));
 240                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 241                            sta->flags & WLAN_STA_ASSOC) {
 242                         /* station activity detected; reset timeout state */
 243                         wpa_printf(MSG_DEBUG, "  Station has been active");
 244                         sta->timeout_next = STA_NULLFUNC;
 245                         next_time = hapd->conf->ap_max_inactivity -
 246                                 inactive_sec;
 247                 }
 248         }
 249
 250         if ((sta->flags & WLAN_STA_ASSOC) &&
 251             sta->timeout_next == STA_DISASSOC &&
 252             !(sta->flags & WLAN_STA_PENDING_POLL)) {
 253                 wpa_printf(MSG_DEBUG, "  Station has ACKed data poll");
 254                 /* data nullfunc frame poll did not produce TX errors; assume
 255                  * station ACKed it */
 256                 sta->timeout_next = STA_NULLFUNC;
 257                 next_time = hapd->conf->ap_max_inactivity;
 258         }
 259
 260         if (next_time) {
 261                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 262                                        sta);
 263                 return;
 264         }
 265
 266         if (sta->timeout_next == STA_NULLFUNC &&
 267             (sta->flags & WLAN_STA_ASSOC)) {
 268                 /* send data frame to poll STA and check whether this frame
 269                  * is ACKed */
 270                 struct ieee80211_hdr hdr;
 271
 272                 wpa_printf(MSG_DEBUG, "  Polling STA with data frame");
 273                 sta->flags |= WLAN_STA_PENDING_POLL;
 274
 275 #ifndef CONFIG_NATIVE_WINDOWS
 276                 /* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
 277                  * it is apparently not retried so TX Exc events are not
 278                  * received for it */
 279                 os_memset(&hdr, 0, sizeof(hdr));
 280                 hdr.frame_control =
 281                         IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 282                 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
 283                 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
 284                 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
 285                           ETH_ALEN);
 286                 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
 287
 288                 if (hostapd_send_mgmt_frame(hapd, &hdr, sizeof(hdr), 0) < 0)
 289                         perror("ap_handle_timer: send");
 290 #endif /* CONFIG_NATIVE_WINDOWS */
 291         } else if (sta->timeout_next != STA_REMOVE) {
 292                 int deauth = sta->timeout_next == STA_DEAUTH;
 293
 294                 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
 295                            deauth ? "deauthentication" : "disassociation",
 296                            MAC2STR(sta->addr));
 297
 298                 if (deauth) {
 299                         hostapd_sta_deauth(hapd, sta->addr,
 300                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 301                 } else {
 302                         hostapd_sta_disassoc(
 303                                 hapd, sta->addr,
 304                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 305                 }
 306         }
 307
 308         switch (sta->timeout_next) {
 309         case STA_NULLFUNC:
 310                 sta->timeout_next = STA_DISASSOC;
 311                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 312                                        hapd, sta);
 313                 break;
 314         case STA_DISASSOC:
 315                 sta->flags &= ~WLAN_STA_ASSOC;
 316                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 317                 if (!sta->acct_terminate_cause)
 318                         sta->acct_terminate_cause =
 319                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 320                 accounting_sta_stop(hapd, sta);
 321                 ieee802_1x_free_station(sta);
 322                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 323                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 324                                "inactivity");
 325                 sta->timeout_next = STA_DEAUTH;
 326                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 327                                        hapd, sta);
 328                 mlme_disassociate_indication(
 329                         hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 330                 break;
 331         case STA_DEAUTH:
 332         case STA_REMOVE:
 333                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 334                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 335                                "inactivity");
 336                 if (!sta->acct_terminate_cause)
 337                         sta->acct_terminate_cause =
 338                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 339                 mlme_deauthenticate_indication(
 340                         hapd, sta,
 341                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 342                 ap_free_sta(hapd, sta);
 343                 break;
 344         }
 345 }
 346
 347
 348 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 349 {
 350         struct hostapd_data *hapd = eloop_ctx;
 351         struct sta_info *sta = timeout_ctx;
 352         u8 addr[ETH_ALEN];
 353
 354         if (!(sta->flags & WLAN_STA_AUTH))
 355                 return;
 356
 357         mlme_deauthenticate_indication(hapd, sta,
 358                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 359         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 360                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 361                        "session timeout");
 362         sta->acct_terminate_cause =
 363                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 364         os_memcpy(addr, sta->addr, ETH_ALEN);
 365         ap_free_sta(hapd, sta);
 366         hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 367 }
 368
 369
 370 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 371                             u32 session_timeout)
 372 {
 373         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 374                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 375                        "seconds", session_timeout);
 376         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 377         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 378                                hapd, sta);
 379 }
 380
 381
 382 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 383 {
 384         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 385 }
 386
 387
 388 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 389 {
 390         struct sta_info *sta;
 391
 392         sta = ap_get_sta(hapd, addr);
 393         if (sta)
 394                 return sta;
 395
 396         wpa_printf(MSG_DEBUG, "  New STA");
 397         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 398                 /* FIX: might try to remove some old STAs first? */
 399                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 400                            hapd->num_sta, hapd->conf->max_num_sta);
 401                 return NULL;
 402         }
 403
 404         sta = os_zalloc(sizeof(struct sta_info));
 405         if (sta == NULL) {
 406                 wpa_printf(MSG_ERROR, "malloc failed");
 407                 return NULL;
 408         }
 409         sta->acct_interim_interval = hapd->conf->radius->acct_interim_interval;
 410
 411         /* initialize STA info data */
 412         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 413                                ap_handle_timer, hapd, sta);
 414         os_memcpy(sta->addr, addr, ETH_ALEN);
 415         sta->next = hapd->sta_list;
 416         hapd->sta_list = sta;
 417         hapd->num_sta++;
 418         ap_sta_hash_add(hapd, sta);
 419         sta->ssid = &hapd->conf->ssid;
 420
 421         return sta;
 422 }
 423
 424
 425 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 426 {
 427         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 428
 429         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 430                    MAC2STR(sta->addr));
 431         if (hostapd_sta_remove(hapd, sta->addr) &&
 432             sta->flags & WLAN_STA_ASSOC) {
 433                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 434                            " from kernel driver.", MAC2STR(sta->addr));
 435                 return -1;
 436         }
 437         return 0;
 438 }
 439
 440
 441 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
 442                                struct sta_info *sta, u32 flags)
 443 {
 444         struct hostapd_iface *iface = hapd->iface;
 445         size_t i;
 446
 447         for (i = 0; i < iface->num_bss; i++) {
 448                 struct hostapd_data *bss = iface->bss[i];
 449                 struct sta_info *sta2;
 450                 /* bss should always be set during operation, but it may be
 451                  * NULL during reconfiguration. Assume the STA is not
 452                  * associated to another BSS in that case to avoid NULL pointer
 453                  * dereferences. */
 454                 if (bss == hapd || bss == NULL)
 455                         continue;
 456                 sta2 = ap_get_sta(bss, sta->addr);
 457                 if (sta2 && ((sta2->flags & flags) == flags))
 458                         return 1;
 459         }
 460
 461         return 0;
 462 }
 463
 464
 465 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 466                          u16 reason)
 467 {
 468         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 469                    hapd->conf->iface, MAC2STR(sta->addr));
 470         sta->flags &= ~WLAN_STA_ASSOC;
 471         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 472                 ap_sta_remove(hapd, sta);
 473         sta->timeout_next = STA_DEAUTH;
 474         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 475         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 476                                ap_handle_timer, hapd, sta);
 477         accounting_sta_stop(hapd, sta);
 478         ieee802_1x_free_station(sta);
 479
 480         mlme_disassociate_indication(hapd, sta, reason);
 481 }
 482
 483
 484 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 485                            u16 reason)
 486 {
 487         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 488                    hapd->conf->iface, MAC2STR(sta->addr));
 489         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 490         if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
 491                 ap_sta_remove(hapd, sta);
 492         sta->timeout_next = STA_REMOVE;
 493         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 494         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 495                                ap_handle_timer, hapd, sta);
 496         accounting_sta_stop(hapd, sta);
 497         ieee802_1x_free_station(sta);
 498
 499         mlme_deauthenticate_indication(hapd, sta, reason);
 500 }
 501
 502
 503 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 504                      int old_vlanid)
 505 {
 506         const char *iface;
 507         struct hostapd_vlan *vlan = NULL;
 508
 509         /*
 510          * Do not proceed furthur if the vlan id remains same. We do not want
 511          * duplicate dynamic vlan entries.
 512          */
 513         if (sta->vlan_id == old_vlanid)
 514                 return 0;
 515
 516         /*
 517          * During 1x reauth, if the vlan id changes, then remove the old id and
 518          * proceed furthur to add the new one.
 519          */
 520         if (old_vlanid > 0)
 521                 vlan_remove_dynamic(hapd, old_vlanid);
 522
 523         iface = hapd->conf->iface;
 524         if (sta->ssid->vlan[0])
 525                 iface = sta->ssid->vlan;
 526
 527         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 528                 sta->vlan_id = 0;
 529         else if (sta->vlan_id > 0) {
 530                 vlan = hapd->conf->vlan;
 531                 while (vlan) {
 532                         if (vlan->vlan_id == sta->vlan_id ||
 533                             vlan->vlan_id == VLAN_ID_WILDCARD) {
 534                                 iface = vlan->ifname;
 535                                 break;
 536                         }
 537                         vlan = vlan->next;
 538                 }
 539         }
 540
 541         if (sta->vlan_id > 0 && vlan == NULL) {
 542                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 543                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 544                                "binding station to (vlan_id=%d)",
 545                                sta->vlan_id);
 546                 return -1;
 547         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 548                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 549                 if (vlan == NULL) {
 550                         hostapd_logger(hapd, sta->addr,
 551                                        HOSTAPD_MODULE_IEEE80211,
 552                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 553                                        "dynamic VLAN interface for vlan_id=%d",
 554                                        sta->vlan_id);
 555                         return -1;
 556                 }
 557
 558                 iface = vlan->ifname;
 559                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 560                         hostapd_logger(hapd, sta->addr,
 561                                        HOSTAPD_MODULE_IEEE80211,
 562                                        HOSTAPD_LEVEL_DEBUG, "could not "
 563                                        "configure encryption for dynamic VLAN "
 564                                        "interface for vlan_id=%d",
 565                                        sta->vlan_id);
 566                 }
 567
 568                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 569                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 570                                "interface '%s'", iface);
 571         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 572                 if (sta->vlan_id > 0) {
 573                         vlan->dynamic_vlan++;
 574                         hostapd_logger(hapd, sta->addr,
 575                                        HOSTAPD_MODULE_IEEE80211,
 576                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 577                                        "dynamic VLAN interface '%s'", iface);
 578                 }
 579
 580                 /*
 581                  * Update encryption configuration for statically generated
 582                  * VLAN interface. This is only used for static WEP
 583                  * configuration for the case where hostapd did not yet know
 584                  * which keys are to be used when the interface was added.
 585                  */
 586                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 587                         hostapd_logger(hapd, sta->addr,
 588                                        HOSTAPD_MODULE_IEEE80211,
 589                                        HOSTAPD_LEVEL_DEBUG, "could not "
 590                                        "configure encryption for VLAN "
 591                                        "interface for vlan_id=%d",
 592                                        sta->vlan_id);
 593                 }
 594         }
 595
 596         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 597                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 598                        "'%s'", iface);
 599
 600         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 601                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 602
 603         return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 604 }
 605
 606
 607 #ifdef CONFIG_IEEE80211W
 608
 609 /* MLME-PING.request */
 610 static void ieee802_11_send_ping_req(struct hostapd_data *hapd, const u8 *addr,
 611                                      const u8 *trans_id)
 612 {
 613         struct ieee80211_mgmt mgmt;
 614         u8 *end;
 615
 616         os_memset(&mgmt, 0, sizeof(mgmt));
 617         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 618                                           WLAN_FC_STYPE_ACTION);
 619         os_memcpy(mgmt.da, addr, ETH_ALEN);
 620         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 621         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 622         mgmt.u.action.category = WLAN_ACTION_PING;
 623         mgmt.u.action.u.ping_req.action = WLAN_PING_REQUEST;
 624         os_memcpy(mgmt.u.action.u.ping_req.trans_id, trans_id,
 625                   WLAN_PING_TRANS_ID_LEN);
 626         end = mgmt.u.action.u.ping_req.trans_id + WLAN_PING_TRANS_ID_LEN;
 627         if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
 628                                     end - (u8 *) &mgmt, 0) < 0)
 629                 perror("ieee802_11_send_ping_req: send");
 630 }
 631
 632
 633 static void ap_ping_timer(void *eloop_ctx, void *timeout_ctx)
 634 {
 635         struct hostapd_data *hapd = eloop_ctx;
 636         struct sta_info *sta = timeout_ctx;
 637         unsigned int timeout, sec, usec;
 638         u8 *trans_id, *nbuf;
 639
 640         if (sta->ping_count >= hapd->conf->assoc_ping_attempts) {
 641                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 642                                HOSTAPD_LEVEL_DEBUG,
 643                                "association ping timed out");
 644                 sta->ping_timed_out = 1;
 645                 os_free(sta->ping_trans_id);
 646                 sta->ping_trans_id = NULL;
 647                 sta->ping_count = 0;
 648                 return;
 649         }
 650
 651         nbuf = os_realloc(sta->ping_trans_id,
 652                           (sta->ping_count + 1) * WLAN_PING_TRANS_ID_LEN);
 653         if (nbuf == NULL)
 654                 return;
 655         trans_id = nbuf + sta->ping_count * WLAN_PING_TRANS_ID_LEN;
 656         sta->ping_trans_id = nbuf;
 657         sta->ping_count++;
 658
 659         os_get_random(trans_id, WLAN_PING_TRANS_ID_LEN);
 660
 661         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 662                        HOSTAPD_LEVEL_DEBUG,
 663                        "association ping attempt %d", sta->ping_count);
 664
 665         ieee802_11_send_ping_req(hapd, sta->addr, trans_id);
 666
 667         timeout = hapd->conf->assoc_ping_timeout;
 668         sec = ((timeout / 1000) * 1024) / 1000;
 669         usec = (timeout % 1000) * 1024;
 670         eloop_register_timeout(sec, usec, ap_ping_timer, hapd, sta);
 671 }
 672
 673
 674 void ap_sta_start_ping(struct hostapd_data *hapd, struct sta_info *sta)
 675 {
 676         ap_ping_timer(hapd, sta);
 677 }
 678
 679
 680 void ap_sta_stop_ping(struct hostapd_data *hapd, struct sta_info *sta)
 681 {
 682         eloop_cancel_timeout(ap_ping_timer, hapd, sta);
 683         os_free(sta->ping_trans_id);
 684         sta->ping_trans_id = NULL;
 685         sta->ping_count = 0;
 686 }
 687
 688 #endif /* CONFIG_IEEE80211W */