hostapd/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "eapol_auth/eapol_auth_sm.h"
  21 #include "eapol_auth/eapol_auth_sm_i.h"
  22 #include "radius/radius_client.h"
  23 #include "eap_server/eap.h"
  24 #include "l2_packet/l2_packet.h"
  25 #include "ap/hostapd.h"
  26 #include "ap/authsrv.h"
  27 #include "ap/sta_info.h"
  28 #include "ap/accounting.h"
  29 #include "ap/ap_list.h"
  30 #include "ap/beacon.h"
  31 #include "ap/iapp.h"
  32 #include "ap/ieee802_1x.h"
  33 #include "ap/ieee802_11_auth.h"
  34 #include "ap/preauth.h"
  35 #include "ap/tkip_countermeasures.h"
  36 #include "ap/vlan_init.h"
  37 #include "ap/wpa.h"
  38 #include "ap/wps_hostapd.h"
  39 #include "hw_features.h"
  40 #include "driver_i.h"
  41 #include "ctrl_iface.h"
  42
  43
  44 static int hostapd_flush_old_stations(struct hostapd_data *hapd);
  45 static int hostapd_setup_wpa(struct hostapd_data *hapd);
  46 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  47
  48 extern int wpa_debug_level;
  49
  50
  51 static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf,
  52                                   struct wpa_auth_config *wconf)
  53 {
  54         wconf->wpa = conf->wpa;
  55         wconf->wpa_key_mgmt = conf->wpa_key_mgmt;
  56         wconf->wpa_pairwise = conf->wpa_pairwise;
  57         wconf->wpa_group = conf->wpa_group;
  58         wconf->wpa_group_rekey = conf->wpa_group_rekey;
  59         wconf->wpa_strict_rekey = conf->wpa_strict_rekey;
  60         wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey;
  61         wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey;
  62         wconf->rsn_pairwise = conf->rsn_pairwise;
  63         wconf->rsn_preauth = conf->rsn_preauth;
  64         wconf->eapol_version = conf->eapol_version;
  65         wconf->peerkey = conf->peerkey;
  66         wconf->wmm_enabled = conf->wmm_enabled;
  67         wconf->okc = conf->okc;
  68 #ifdef CONFIG_IEEE80211W
  69         wconf->ieee80211w = conf->ieee80211w;
  70 #endif /* CONFIG_IEEE80211W */
  71 #ifdef CONFIG_IEEE80211R
  72         wconf->ssid_len = conf->ssid.ssid_len;
  73         if (wconf->ssid_len > SSID_LEN)
  74                 wconf->ssid_len = SSID_LEN;
  75         os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len);
  76         os_memcpy(wconf->mobility_domain, conf->mobility_domain,
  77                   MOBILITY_DOMAIN_ID_LEN);
  78         if (conf->nas_identifier &&
  79             os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) {
  80                 wconf->r0_key_holder_len = os_strlen(conf->nas_identifier);
  81                 os_memcpy(wconf->r0_key_holder, conf->nas_identifier,
  82                           wconf->r0_key_holder_len);
  83         }
  84         os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN);
  85         wconf->r0_key_lifetime = conf->r0_key_lifetime;
  86         wconf->reassociation_deadline = conf->reassociation_deadline;
  87         wconf->r0kh_list = conf->r0kh_list;
  88         wconf->r1kh_list = conf->r1kh_list;
  89         wconf->pmk_r1_push = conf->pmk_r1_push;
  90 #endif /* CONFIG_IEEE80211R */
  91 }
  92
  93
  94 int hostapd_reload_config(struct hostapd_iface *iface)
  95 {
  96         struct hostapd_data *hapd = iface->bss[0];
  97         struct hostapd_config *newconf, *oldconf;
  98         struct wpa_auth_config wpa_auth_conf;
  99         size_t j;
 100
 101         if (iface->config_read_cb == NULL)
 102                 return -1;
 103         newconf = iface->config_read_cb(iface->config_fname);
 104         if (newconf == NULL)
 105                 return -1;
 106
 107         /*
 108          * Deauthenticate all stations since the new configuration may not
 109          * allow them to use the BSS anymore.
 110          */
 111         for (j = 0; j < iface->num_bss; j++)
 112                 hostapd_flush_old_stations(iface->bss[j]);
 113
 114 #ifndef CONFIG_NO_RADIUS
 115         /* TODO: update dynamic data based on changed configuration
 116          * items (e.g., open/close sockets, etc.) */
 117         radius_client_flush(hapd->radius, 0);
 118 #endif /* CONFIG_NO_RADIUS */
 119
 120         oldconf = hapd->iconf;
 121         hapd->iconf = newconf;
 122         hapd->conf = &newconf->bss[0];
 123         iface->conf = newconf;
 124
 125         if (hostapd_setup_wpa_psk(hapd->conf)) {
 126                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
 127                            "after reloading configuration");
 128         }
 129
 130         if (hapd->conf->wpa && hapd->wpa_auth == NULL)
 131                 hostapd_setup_wpa(hapd);
 132         else if (hapd->conf->wpa) {
 133                 hostapd_wpa_auth_conf(&newconf->bss[0], &wpa_auth_conf);
 134                 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf);
 135         } else if (hapd->wpa_auth) {
 136                 wpa_deinit(hapd->wpa_auth);
 137                 hapd->wpa_auth = NULL;
 138                 hostapd_set_privacy(hapd, 0);
 139                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 140         }
 141
 142         ieee802_11_set_beacon(hapd);
 143
 144         if (hapd->conf->ssid.ssid_set &&
 145             hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
 146                              hapd->conf->ssid.ssid_len)) {
 147                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 148                 /* try to continue */
 149         }
 150
 151         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
 152                 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
 153         else
 154                 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
 155
 156         hostapd_config_free(oldconf);
 157
 158         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 159
 160         return 0;
 161 }
 162
 163
 164 int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 165 {
 166         if (hostapd_reload_config(iface) < 0) {
 167                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 168                            "file - continuing with old.");
 169         }
 170         return 0;
 171 }
 172
 173
 174 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 175                                               char *ifname)
 176 {
 177         int i;
 178
 179         for (i = 0; i < NUM_WEP_KEYS; i++) {
 180                 if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 181                                       i == 0 ? 1 : 0, NULL, 0, NULL, 0)) {
 182                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 183                                    "encryption keys (ifname=%s keyidx=%d)",
 184                                    ifname, i);
 185                 }
 186         }
 187 #ifdef CONFIG_IEEE80211W
 188         if (hapd->conf->ieee80211w) {
 189                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 190                         if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL,
 191                                               i, i == 0 ? 1 : 0, NULL, 0,
 192                                               NULL, 0)) {
 193                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 194                                            "default mgmt encryption keys "
 195                                            "(ifname=%s keyidx=%d)", ifname, i);
 196                         }
 197                 }
 198         }
 199 #endif /* CONFIG_IEEE80211W */
 200 }
 201
 202
 203 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 204 {
 205         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 206         return 0;
 207 }
 208
 209
 210 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 211 {
 212         int errors = 0, idx;
 213         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 214
 215         idx = ssid->wep.idx;
 216         if (ssid->wep.default_len &&
 217             hapd->drv.set_key(hapd->conf->iface,
 218                               hapd, WPA_ALG_WEP, NULL, idx,
 219                               idx == ssid->wep.idx,
 220                               NULL, 0, ssid->wep.key[idx],
 221                               ssid->wep.len[idx])) {
 222                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 223                 errors++;
 224         }
 225
 226         if (ssid->dyn_vlan_keys) {
 227                 size_t i;
 228                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 229                         const char *ifname;
 230                         struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
 231                         if (key == NULL)
 232                                 continue;
 233                         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 234                                                             i);
 235                         if (ifname == NULL)
 236                                 continue;
 237
 238                         idx = key->idx;
 239                         if (hapd->drv.set_key(ifname, hapd, WPA_ALG_WEP, NULL,
 240                                               idx, idx == key->idx, NULL, 0,
 241                                               key->key[idx], key->len[idx])) {
 242                                 wpa_printf(MSG_WARNING, "Could not set "
 243                                            "dynamic VLAN WEP encryption.");
 244                                 errors++;
 245                         }
 246                 }
 247         }
 248
 249         return errors;
 250 }
 251
 252 /**
 253  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 254  * @hapd: Pointer to BSS data
 255  *
 256  * This function is used to free all per-BSS data structures and resources.
 257  * This gets called in a loop for each BSS between calls to
 258  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 259  * is deinitialized. Most of the modules that are initialized in
 260  * hostapd_setup_bss() are deinitialized here.
 261  */
 262 static void hostapd_cleanup(struct hostapd_data *hapd)
 263 {
 264         hostapd_ctrl_iface_deinit(hapd);
 265
 266         iapp_deinit(hapd->iapp);
 267         hapd->iapp = NULL;
 268         accounting_deinit(hapd);
 269         rsn_preauth_iface_deinit(hapd);
 270         if (hapd->wpa_auth) {
 271                 wpa_deinit(hapd->wpa_auth);
 272                 hapd->wpa_auth = NULL;
 273
 274                 if (hostapd_set_privacy(hapd, 0)) {
 275                         wpa_printf(MSG_DEBUG, "Could not disable "
 276                                    "PrivacyInvoked for interface %s",
 277                                    hapd->conf->iface);
 278                 }
 279
 280                 if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) {
 281                         wpa_printf(MSG_DEBUG, "Could not remove generic "
 282                                    "information element from interface %s",
 283                                    hapd->conf->iface);
 284                 }
 285         }
 286         ieee802_1x_deinit(hapd);
 287         vlan_deinit(hapd);
 288         hostapd_acl_deinit(hapd);
 289 #ifndef CONFIG_NO_RADIUS
 290         radius_client_deinit(hapd->radius);
 291         hapd->radius = NULL;
 292 #endif /* CONFIG_NO_RADIUS */
 293
 294 #ifdef CONFIG_IEEE80211R
 295         l2_packet_deinit(hapd->l2);
 296 #endif /* CONFIG_IEEE80211R */
 297
 298         hostapd_deinit_wps(hapd);
 299
 300         authsrv_deinit(hapd);
 301
 302         if (hapd->interface_added &&
 303             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 304                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 305                            hapd->conf->iface);
 306         }
 307
 308         os_free(hapd->probereq_cb);
 309         hapd->probereq_cb = NULL;
 310 }
 311
 312
 313 /**
 314  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 315  * @iface: Pointer to interface data
 316  *
 317  * This function is called before per-BSS data structures are deinitialized
 318  * with hostapd_cleanup().
 319  */
 320 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 321 {
 322 }
 323
 324
 325 /**
 326  * hostapd_cleanup_iface - Complete per-interface cleanup
 327  * @iface: Pointer to interface data
 328  *
 329  * This function is called after per-BSS data structures are deinitialized
 330  * with hostapd_cleanup().
 331  */
 332 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 333 {
 334         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 335         iface->hw_features = NULL;
 336         os_free(iface->current_rates);
 337         iface->current_rates = NULL;
 338         ap_list_deinit(iface);
 339         hostapd_config_free(iface->conf);
 340         iface->conf = NULL;
 341
 342         os_free(iface->config_fname);
 343         os_free(iface->bss);
 344         os_free(iface);
 345 }
 346
 347
 348 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 349 {
 350         int i;
 351
 352         hostapd_broadcast_wep_set(hapd);
 353
 354         if (hapd->conf->ssid.wep.default_len) {
 355                 hostapd_set_privacy(hapd, 1);
 356                 return 0;
 357         }
 358
 359         for (i = 0; i < 4; i++) {
 360                 if (hapd->conf->ssid.wep.key[i] &&
 361                     hapd->drv.set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 362                                       i == hapd->conf->ssid.wep.idx, NULL, 0,
 363                                       hapd->conf->ssid.wep.key[i],
 364                                       hapd->conf->ssid.wep.len[i])) {
 365                         wpa_printf(MSG_WARNING, "Could not set WEP "
 366                                    "encryption.");
 367                         return -1;
 368                 }
 369                 if (hapd->conf->ssid.wep.key[i] &&
 370                     i == hapd->conf->ssid.wep.idx)
 371                         hostapd_set_privacy(hapd, 1);
 372         }
 373
 374         return 0;
 375 }
 376
 377
 378 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 379 {
 380         int ret = 0;
 381
 382         if (hostapd_drv_none(hapd))
 383                 return 0;
 384
 385         wpa_printf(MSG_DEBUG, "Flushing old station entries");
 386         if (hostapd_flush(hapd)) {
 387                 wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
 388                 ret = -1;
 389         }
 390         wpa_printf(MSG_DEBUG, "Deauthenticate all stations");
 391
 392         /* New Prism2.5/3 STA firmware versions seem to have issues with this
 393          * broadcast deauth frame. This gets the firmware in odd state where
 394          * nothing works correctly, so let's skip sending this for the hostap
 395          * driver. */
 396         if (hapd->driver && os_strcmp(hapd->driver->name, "hostap") != 0) {
 397                 u8 addr[ETH_ALEN];
 398                 os_memset(addr, 0xff, ETH_ALEN);
 399                 hapd->drv.sta_deauth(hapd, addr,
 400                                      WLAN_REASON_PREV_AUTH_NOT_VALID);
 401         }
 402
 403         return ret;
 404 }
 405
 406
 407 static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr,
 408                                     logger_level level, const char *txt)
 409 {
 410 #ifndef CONFIG_NO_HOSTAPD_LOGGER
 411         struct hostapd_data *hapd = ctx;
 412         int hlevel;
 413
 414         switch (level) {
 415         case LOGGER_WARNING:
 416                 hlevel = HOSTAPD_LEVEL_WARNING;
 417                 break;
 418         case LOGGER_INFO:
 419                 hlevel = HOSTAPD_LEVEL_INFO;
 420                 break;
 421         case LOGGER_DEBUG:
 422         default:
 423                 hlevel = HOSTAPD_LEVEL_DEBUG;
 424                 break;
 425         }
 426
 427         hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt);
 428 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 429 }
 430
 431
 432 static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr,
 433                                         u16 reason)
 434 {
 435         struct hostapd_data *hapd = ctx;
 436         wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: "
 437                    "STA " MACSTR " reason %d",
 438                    __func__, MAC2STR(addr), reason);
 439         ap_sta_disconnect(hapd, NULL, addr, reason);
 440 }
 441
 442
 443 static void hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr)
 444 {
 445         struct hostapd_data *hapd = ctx;
 446         michael_mic_failure(hapd, addr, 0);
 447 }
 448
 449
 450 static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr,
 451                                        wpa_eapol_variable var, int value)
 452 {
 453         struct hostapd_data *hapd = ctx;
 454         struct sta_info *sta = ap_get_sta(hapd, addr);
 455         if (sta == NULL)
 456                 return;
 457         switch (var) {
 458         case WPA_EAPOL_portEnabled:
 459                 ieee802_1x_notify_port_enabled(sta->eapol_sm, value);
 460                 break;
 461         case WPA_EAPOL_portValid:
 462                 ieee802_1x_notify_port_valid(sta->eapol_sm, value);
 463                 break;
 464         case WPA_EAPOL_authorized:
 465                 ieee802_1x_set_sta_authorized(hapd, sta, value);
 466                 break;
 467         case WPA_EAPOL_portControl_Auto:
 468                 if (sta->eapol_sm)
 469                         sta->eapol_sm->portControl = Auto;
 470                 break;
 471         case WPA_EAPOL_keyRun:
 472                 if (sta->eapol_sm)
 473                         sta->eapol_sm->keyRun = value ? TRUE : FALSE;
 474                 break;
 475         case WPA_EAPOL_keyAvailable:
 476                 if (sta->eapol_sm)
 477                         sta->eapol_sm->eap_if->eapKeyAvailable =
 478                                 value ? TRUE : FALSE;
 479                 break;
 480         case WPA_EAPOL_keyDone:
 481                 if (sta->eapol_sm)
 482                         sta->eapol_sm->keyDone = value ? TRUE : FALSE;
 483                 break;
 484         case WPA_EAPOL_inc_EapolFramesTx:
 485                 if (sta->eapol_sm)
 486                         sta->eapol_sm->dot1xAuthEapolFramesTx++;
 487                 break;
 488         }
 489 }
 490
 491
 492 static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr,
 493                                       wpa_eapol_variable var)
 494 {
 495         struct hostapd_data *hapd = ctx;
 496         struct sta_info *sta = ap_get_sta(hapd, addr);
 497         if (sta == NULL || sta->eapol_sm == NULL)
 498                 return -1;
 499         switch (var) {
 500         case WPA_EAPOL_keyRun:
 501                 return sta->eapol_sm->keyRun;
 502         case WPA_EAPOL_keyAvailable:
 503                 return sta->eapol_sm->eap_if->eapKeyAvailable;
 504         default:
 505                 return -1;
 506         }
 507 }
 508
 509
 510 static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr,
 511                                            const u8 *prev_psk)
 512 {
 513         struct hostapd_data *hapd = ctx;
 514         return hostapd_get_psk(hapd->conf, addr, prev_psk);
 515 }
 516
 517
 518 static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk,
 519                                     size_t *len)
 520 {
 521         struct hostapd_data *hapd = ctx;
 522         const u8 *key;
 523         size_t keylen;
 524         struct sta_info *sta;
 525
 526         sta = ap_get_sta(hapd, addr);
 527         if (sta == NULL)
 528                 return -1;
 529
 530         key = ieee802_1x_get_key(sta->eapol_sm, &keylen);
 531         if (key == NULL)
 532                 return -1;
 533
 534         if (keylen > *len)
 535                 keylen = *len;
 536         os_memcpy(msk, key, keylen);
 537         *len = keylen;
 538
 539         return 0;
 540 }
 541
 542
 543 static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, wpa_alg alg,
 544                                     const u8 *addr, int idx, u8 *key,
 545                                     size_t key_len)
 546 {
 547         struct hostapd_data *hapd = ctx;
 548         const char *ifname = hapd->conf->iface;
 549
 550         if (vlan_id > 0) {
 551                 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 552                 if (ifname == NULL)
 553                         return -1;
 554         }
 555
 556         return hapd->drv.set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0,
 557                                  key, key_len);
 558 }
 559
 560
 561 static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx,
 562                                        u8 *seq)
 563 {
 564         struct hostapd_data *hapd = ctx;
 565         return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq);
 566 }
 567
 568
 569 static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr,
 570                                        const u8 *data, size_t data_len,
 571                                        int encrypt)
 572 {
 573         struct hostapd_data *hapd = ctx;
 574         return hapd->drv.send_eapol(hapd, addr, data, data_len, encrypt);
 575 }
 576
 577
 578 static int hostapd_wpa_auth_for_each_sta(
 579         void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx),
 580         void *cb_ctx)
 581 {
 582         struct hostapd_data *hapd = ctx;
 583         struct sta_info *sta;
 584
 585         for (sta = hapd->sta_list; sta; sta = sta->next) {
 586                 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx))
 587                         return 1;
 588         }
 589         return 0;
 590 }
 591
 592
 593 struct wpa_auth_iface_iter_data {
 594         int (*cb)(struct wpa_authenticator *sm, void *ctx);
 595         void *cb_ctx;
 596 };
 597
 598 static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx)
 599 {
 600         struct wpa_auth_iface_iter_data *data = ctx;
 601         size_t i;
 602         for (i = 0; i < iface->num_bss; i++) {
 603                 if (data->cb(iface->bss[i]->wpa_auth, data->cb_ctx))
 604                         return 1;
 605         }
 606         return 0;
 607 }
 608
 609
 610 static int hostapd_wpa_auth_for_each_auth(
 611         void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx),
 612         void *cb_ctx)
 613 {
 614         struct hostapd_data *hapd = ctx;
 615         struct wpa_auth_iface_iter_data data;
 616         data.cb = cb;
 617         data.cb_ctx = cb_ctx;
 618         return hostapd_for_each_interface(hapd->iface->interfaces,
 619                                           wpa_auth_iface_iter, &data);
 620 }
 621
 622
 623 static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto,
 624                                        const u8 *data, size_t data_len)
 625 {
 626         struct hostapd_data *hapd = ctx;
 627
 628         if (hapd->driver && hapd->driver->send_ether)
 629                 return hapd->driver->send_ether(hapd->drv_priv, dst,
 630                                                 hapd->own_addr, proto,
 631                                                 data, data_len);
 632         if (hapd->l2 == NULL)
 633                 return -1;
 634         return l2_packet_send(hapd->l2, dst, proto, data, data_len);
 635 }
 636
 637
 638 #ifdef CONFIG_IEEE80211R
 639
 640 static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst,
 641                                            const u8 *data, size_t data_len)
 642 {
 643         struct hostapd_data *hapd = ctx;
 644         int res;
 645         struct ieee80211_mgmt *m;
 646         size_t mlen;
 647         struct sta_info *sta;
 648
 649         sta = ap_get_sta(hapd, dst);
 650         if (sta == NULL || sta->wpa_sm == NULL)
 651                 return -1;
 652
 653         m = os_zalloc(sizeof(*m) + data_len);
 654         if (m == NULL)
 655                 return -1;
 656         mlen = ((u8 *) &m->u - (u8 *) m) + data_len;
 657         m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 658                                         WLAN_FC_STYPE_ACTION);
 659         os_memcpy(m->da, dst, ETH_ALEN);
 660         os_memcpy(m->sa, hapd->own_addr, ETH_ALEN);
 661         os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN);
 662         os_memcpy(&m->u, data, data_len);
 663
 664         res = hapd->drv.send_mgmt_frame(hapd, (u8 *) m, mlen);
 665         os_free(m);
 666         return res;
 667 }
 668
 669
 670 static struct wpa_state_machine *
 671 hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr)
 672 {
 673         struct hostapd_data *hapd = ctx;
 674         struct sta_info *sta;
 675
 676         sta = ap_sta_add(hapd, sta_addr);
 677         if (sta == NULL)
 678                 return NULL;
 679         if (sta->wpa_sm)
 680                 return sta->wpa_sm;
 681
 682         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr);
 683         if (sta->wpa_sm == NULL) {
 684                 ap_free_sta(hapd, sta);
 685                 return NULL;
 686         }
 687         sta->auth_alg = WLAN_AUTH_FT;
 688
 689         return sta->wpa_sm;
 690 }
 691
 692
 693 static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf,
 694                                 size_t len)
 695 {
 696         struct hostapd_data *hapd = ctx;
 697         wpa_ft_rrb_rx(hapd->wpa_auth, src_addr, buf, len);
 698 }
 699
 700 #endif /* CONFIG_IEEE80211R */
 701
 702
 703 /**
 704  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 705  * @iface: Pointer to interface data
 706  * Returns: 0 on success, -1 on failure
 707  *
 708  * This function is used to validate that the configured BSSIDs are valid.
 709  */
 710 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 711 {
 712         u8 mask[ETH_ALEN] = { 0 };
 713         struct hostapd_data *hapd = iface->bss[0];
 714         unsigned int i = iface->conf->num_bss, bits = 0, j;
 715         int res;
 716         int auto_addr = 0;
 717
 718         if (hostapd_drv_none(hapd))
 719                 return 0;
 720
 721         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 722
 723         /* Determine the bits necessary to cover the number of BSSIDs. */
 724         for (i--; i; i >>= 1)
 725                 bits++;
 726
 727         /* Determine the bits necessary to any configured BSSIDs,
 728            if they are higher than the number of BSSIDs. */
 729         for (j = 0; j < iface->conf->num_bss; j++) {
 730                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 731                         if (j)
 732                                 auto_addr++;
 733                         continue;
 734                 }
 735
 736                 for (i = 0; i < ETH_ALEN; i++) {
 737                         mask[i] |=
 738                                 iface->conf->bss[j].bssid[i] ^
 739                                 hapd->own_addr[i];
 740                 }
 741         }
 742
 743         if (!auto_addr)
 744                 goto skip_mask_ext;
 745
 746         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 747                 ;
 748         j = 0;
 749         if (i < ETH_ALEN) {
 750                 j = (5 - i) * 8;
 751
 752                 while (mask[i] != 0) {
 753                         mask[i] >>= 1;
 754                         j++;
 755                 }
 756         }
 757
 758         if (bits < j)
 759                 bits = j;
 760
 761         if (bits > 40) {
 762                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 763                            bits);
 764                 return -1;
 765         }
 766
 767         os_memset(mask, 0xff, ETH_ALEN);
 768         j = bits / 8;
 769         for (i = 5; i > 5 - j; i--)
 770                 mask[i] = 0;
 771         j = bits % 8;
 772         while (j--)
 773                 mask[i] <<= 1;
 774
 775 skip_mask_ext:
 776         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 777                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 778
 779         res = hostapd_valid_bss_mask(hapd, hapd->own_addr, mask);
 780         if (res == 0)
 781                 return 0;
 782
 783         if (res < 0) {
 784                 wpa_printf(MSG_ERROR, "Driver did not accept BSSID mask "
 785                            MACSTR " for start address " MACSTR ".",
 786                            MAC2STR(mask), MAC2STR(hapd->own_addr));
 787                 return -1;
 788         }
 789
 790         if (!auto_addr)
 791                 return 0;
 792
 793         for (i = 0; i < ETH_ALEN; i++) {
 794                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 795                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 796                                    " for start address " MACSTR ".",
 797                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 798                         wpa_printf(MSG_ERROR, "Start address must be the "
 799                                    "first address in the block (i.e., addr "
 800                                    "AND mask == addr).");
 801                         return -1;
 802                 }
 803         }
 804
 805         return 0;
 806 }
 807
 808
 809 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 810 {
 811         size_t i;
 812
 813         for (i = 0; i < conf->num_bss; i++) {
 814                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 815                         return 1;
 816                 }
 817         }
 818
 819         return 0;
 820 }
 821
 822
 823 static int hostapd_setup_wpa(struct hostapd_data *hapd)
 824 {
 825         struct wpa_auth_config _conf;
 826         struct wpa_auth_callbacks cb;
 827         const u8 *wpa_ie;
 828         size_t wpa_ie_len;
 829
 830         hostapd_wpa_auth_conf(hapd->conf, &_conf);
 831         os_memset(&cb, 0, sizeof(cb));
 832         cb.ctx = hapd;
 833         cb.logger = hostapd_wpa_auth_logger;
 834         cb.disconnect = hostapd_wpa_auth_disconnect;
 835         cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report;
 836         cb.set_eapol = hostapd_wpa_auth_set_eapol;
 837         cb.get_eapol = hostapd_wpa_auth_get_eapol;
 838         cb.get_psk = hostapd_wpa_auth_get_psk;
 839         cb.get_msk = hostapd_wpa_auth_get_msk;
 840         cb.set_key = hostapd_wpa_auth_set_key;
 841         cb.get_seqnum = hostapd_wpa_auth_get_seqnum;
 842         cb.send_eapol = hostapd_wpa_auth_send_eapol;
 843         cb.for_each_sta = hostapd_wpa_auth_for_each_sta;
 844         cb.for_each_auth = hostapd_wpa_auth_for_each_auth;
 845         cb.send_ether = hostapd_wpa_auth_send_ether;
 846 #ifdef CONFIG_IEEE80211R
 847         cb.send_ft_action = hostapd_wpa_auth_send_ft_action;
 848         cb.add_sta = hostapd_wpa_auth_add_sta;
 849 #endif /* CONFIG_IEEE80211R */
 850         hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb);
 851         if (hapd->wpa_auth == NULL) {
 852                 wpa_printf(MSG_ERROR, "WPA initialization failed.");
 853                 return -1;
 854         }
 855
 856         if (hostapd_set_privacy(hapd, 1)) {
 857                 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked "
 858                            "for interface %s", hapd->conf->iface);
 859                 return -1;
 860         }
 861
 862         wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
 863         if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) {
 864                 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 865                            "the kernel driver.");
 866                 return -1;
 867         }
 868
 869         if (rsn_preauth_iface_init(hapd)) {
 870                 wpa_printf(MSG_ERROR, "Initialization of RSN "
 871                            "pre-authentication failed.");
 872                 return -1;
 873         }
 874
 875         return 0;
 876
 877 }
 878
 879
 880 /**
 881  * hostapd_setup_bss - Per-BSS setup (initialization)
 882  * @hapd: Pointer to BSS data
 883  * @first: Whether this BSS is the first BSS of an interface
 884  *
 885  * This function is used to initialize all per-BSS data structures and
 886  * resources. This gets called in a loop for each BSS when an interface is
 887  * initialized. Most of the modules that are initialized here will be
 888  * deinitialized in hostapd_cleanup().
 889  */
 890 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 891 {
 892         struct hostapd_bss_config *conf = hapd->conf;
 893         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 894         int ssid_len, set_ssid;
 895
 896         if (!first) {
 897                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 898                         /* Allocate the next available BSSID. */
 899                         do {
 900                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 901                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 902                 } else {
 903                         /* Allocate the configured BSSID. */
 904                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 905
 906                         if (hostapd_mac_comp(hapd->own_addr,
 907                                              hapd->iface->bss[0]->own_addr) ==
 908                             0) {
 909                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 910                                            "BSSID set to the MAC address of "
 911                                            "the radio", hapd->conf->iface);
 912                                 return -1;
 913                         }
 914                 }
 915
 916                 hapd->interface_added = 1;
 917                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 918                                    hapd->conf->iface, hapd->own_addr, hapd)) {
 919                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 920                                    MACSTR ")", MAC2STR(hapd->own_addr));
 921                         return -1;
 922                 }
 923         }
 924
 925         hostapd_flush_old_stations(hapd);
 926         hostapd_set_privacy(hapd, 0);
 927
 928         hostapd_broadcast_wep_clear(hapd);
 929         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 930                 return -1;
 931
 932         /*
 933          * Fetch the SSID from the system and use it or,
 934          * if one was specified in the config file, verify they
 935          * match.
 936          */
 937         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 938         if (ssid_len < 0) {
 939                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 940                 return -1;
 941         }
 942         if (conf->ssid.ssid_set) {
 943                 /*
 944                  * If SSID is specified in the config file and it differs
 945                  * from what is being used then force installation of the
 946                  * new SSID.
 947                  */
 948                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 949                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 950         } else {
 951                 /*
 952                  * No SSID in the config file; just use the one we got
 953                  * from the system.
 954                  */
 955                 set_ssid = 0;
 956                 conf->ssid.ssid_len = ssid_len;
 957                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 958                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 959         }
 960
 961         if (!hostapd_drv_none(hapd)) {
 962                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 963                            " and ssid '%s'",
 964                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 965                            hapd->conf->ssid.ssid);
 966         }
 967
 968         if (hostapd_setup_wpa_psk(conf)) {
 969                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 970                 return -1;
 971         }
 972
 973         /* Set SSID for the kernel driver (to be used in beacon and probe
 974          * response frames) */
 975         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 976                                          conf->ssid.ssid_len)) {
 977                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 978                 return -1;
 979         }
 980
 981         if (wpa_debug_level == MSG_MSGDUMP)
 982                 conf->radius->msg_dumps = 1;
 983 #ifndef CONFIG_NO_RADIUS
 984         hapd->radius = radius_client_init(hapd, conf->radius);
 985         if (hapd->radius == NULL) {
 986                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 987                 return -1;
 988         }
 989 #endif /* CONFIG_NO_RADIUS */
 990
 991         if (hostapd_acl_init(hapd)) {
 992                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 993                 return -1;
 994         }
 995         if (hostapd_init_wps(hapd, conf))
 996                 return -1;
 997
 998         if (ieee802_1x_init(hapd)) {
 999                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
1000                 return -1;
1001         }
1002
1003         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
1004                 return -1;
1005
1006         if (accounting_init(hapd)) {
1007                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
1008                 return -1;
1009         }
1010
1011         if (hapd->conf->ieee802_11f &&
1012             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
1013                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
1014                            "failed.");
1015                 return -1;
1016         }
1017
1018         if (hostapd_ctrl_iface_init(hapd)) {
1019                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
1020                 return -1;
1021         }
1022
1023         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
1024                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
1025                 return -1;
1026         }
1027
1028 #ifdef CONFIG_IEEE80211R
1029         if (!hostapd_drv_none(hapd)) {
1030                 hapd->l2 = l2_packet_init(hapd->conf->iface, NULL, ETH_P_RRB,
1031                                           hostapd_rrb_receive, hapd, 0);
1032                 if (hapd->l2 == NULL &&
1033                     (hapd->driver == NULL ||
1034                      hapd->driver->send_ether == NULL)) {
1035                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1036                                    "interface");
1037                         return -1;
1038                 }
1039         }
1040 #endif /* CONFIG_IEEE80211R */
1041
1042         ieee802_11_set_beacon(hapd);
1043
1044         if (authsrv_init(hapd) < 0)
1045                 return -1;
1046
1047         return 0;
1048 }
1049
1050
1051 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
1052 {
1053         struct hostapd_data *hapd = iface->bss[0];
1054         int i;
1055         struct hostapd_tx_queue_params *p;
1056
1057         for (i = 0; i < NUM_TX_QUEUES; i++) {
1058                 p = &iface->conf->tx_queue[i];
1059
1060                 if (!p->configured)
1061                         continue;
1062
1063                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
1064                                                 p->cwmax, p->burst)) {
1065                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
1066                                    "parameters for queue %d.", i);
1067                         /* Continue anyway */
1068                 }
1069         }
1070 }
1071
1072
1073 static int setup_interface(struct hostapd_iface *iface)
1074 {
1075         struct hostapd_data *hapd = iface->bss[0];
1076         size_t i;
1077         char country[4];
1078
1079         /*
1080          * Make sure that all BSSes get configured with a pointer to the same
1081          * driver interface.
1082          */
1083         for (i = 1; i < iface->num_bss; i++) {
1084                 iface->bss[i]->driver = hapd->driver;
1085                 iface->bss[i]->drv_priv = hapd->drv_priv;
1086         }
1087
1088         if (hostapd_validate_bssid_configuration(iface))
1089                 return -1;
1090
1091         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1092                 os_memcpy(country, hapd->iconf->country, 3);
1093                 country[3] = '\0';
1094                 if (hostapd_set_country(hapd, country) < 0) {
1095                         wpa_printf(MSG_ERROR, "Failed to set country code");
1096                         return -1;
1097                 }
1098         }
1099
1100         if (hostapd_get_hw_features(iface)) {
1101                 /* Not all drivers support this yet, so continue without hw
1102                  * feature data. */
1103         } else {
1104                 int ret = hostapd_select_hw_mode(iface);
1105                 if (ret < 0) {
1106                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1107                                    "channel. (%d)", ret);
1108                         return -1;
1109                 }
1110                 ret = hostapd_check_ht_capab(iface);
1111                 if (ret < 0)
1112                         return -1;
1113                 if (ret == 1) {
1114                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1115                                    "be completed in a callback");
1116                         return 0;
1117                 }
1118         }
1119         return hostapd_setup_interface_complete(iface, 0);
1120 }
1121
1122
1123 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1124 {
1125         struct hostapd_data *hapd = iface->bss[0];
1126         int freq;
1127         size_t j;
1128         u8 *prev_addr;
1129
1130         if (err) {
1131                 wpa_printf(MSG_ERROR, "Interface initialization failed");
1132                 eloop_terminate();
1133                 return -1;
1134         }
1135
1136         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1137         if (hapd->iconf->channel) {
1138                 freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
1139                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1140                            "Frequency: %d MHz",
1141                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
1142                            hapd->iconf->channel, freq);
1143
1144                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, freq,
1145                                      hapd->iconf->channel,
1146                                      hapd->iconf->ieee80211n,
1147                                      hapd->iconf->secondary_channel)) {
1148                         wpa_printf(MSG_ERROR, "Could not set channel for "
1149                                    "kernel driver");
1150                         return -1;
1151                 }
1152         }
1153
1154         if (hapd->iconf->rts_threshold > -1 &&
1155             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1156                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1157                            "kernel driver");
1158                 return -1;
1159         }
1160
1161         if (hapd->iconf->fragm_threshold > -1 &&
1162             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1163                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1164                            "for kernel driver");
1165                 return -1;
1166         }
1167
1168         prev_addr = hapd->own_addr;
1169
1170         for (j = 0; j < iface->num_bss; j++) {
1171                 hapd = iface->bss[j];
1172                 if (j)
1173                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1174                 if (hostapd_setup_bss(hapd, j == 0))
1175                         return -1;
1176                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1177                         prev_addr = hapd->own_addr;
1178         }
1179
1180         hostapd_tx_queue_params(iface);
1181
1182         ap_list_init(iface);
1183
1184         if (hostapd_driver_commit(hapd) < 0) {
1185                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1186                            "configuration", __func__);
1187                 return -1;
1188         }
1189
1190         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1191                    iface->bss[0]->conf->iface);
1192
1193         return 0;
1194 }
1195
1196
1197 /**
1198  * hostapd_setup_interface - Setup of an interface
1199  * @iface: Pointer to interface data.
1200  * Returns: 0 on success, -1 on failure
1201  *
1202  * Initializes the driver interface, validates the configuration,
1203  * and sets driver parameters based on the configuration.
1204  * Flushes old stations, sets the channel, encryption,
1205  * beacons, and WDS links based on the configuration.
1206  */
1207 int hostapd_setup_interface(struct hostapd_iface *iface)
1208 {
1209         int ret;
1210
1211         ret = setup_interface(iface);
1212         if (ret) {
1213                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1214                            iface->bss[0]->conf->iface);
1215                 return -1;
1216         }
1217
1218         return 0;
1219 }
1220
1221
1222 /**
1223  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1224  * @hapd_iface: Pointer to interface data
1225  * @conf: Pointer to per-interface configuration
1226  * @bss: Pointer to per-BSS configuration for this BSS
1227  * Returns: Pointer to allocated BSS data
1228  *
1229  * This function is used to allocate per-BSS data structure. This data will be
1230  * freed after hostapd_cleanup() is called for it during interface
1231  * deinitialization.
1232  */
1233 struct hostapd_data *
1234 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1235                        struct hostapd_config *conf,
1236                        struct hostapd_bss_config *bss)
1237 {
1238         struct hostapd_data *hapd;
1239
1240         hapd = os_zalloc(sizeof(*hapd));
1241         if (hapd == NULL)
1242                 return NULL;
1243
1244         hostapd_set_driver_ops(&hapd->drv);
1245         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1246         hapd->iconf = conf;
1247         hapd->conf = bss;
1248         hapd->iface = hapd_iface;
1249         hapd->driver = hapd->iconf->driver;
1250
1251         return hapd;
1252 }
1253
1254
1255 void hostapd_interface_deinit(struct hostapd_iface *iface)
1256 {
1257         size_t j;
1258
1259         if (iface == NULL)
1260                 return;
1261
1262         hostapd_cleanup_iface_pre(iface);
1263         for (j = 0; j < iface->num_bss; j++) {
1264                 struct hostapd_data *hapd = iface->bss[j];
1265                 hostapd_free_stas(hapd);
1266                 hostapd_flush_old_stations(hapd);
1267                 hostapd_cleanup(hapd);
1268                 if (j == iface->num_bss - 1 && hapd->driver)
1269                         hostapd_driver_deinit(hapd);
1270         }
1271         for (j = 0; j < iface->num_bss; j++)
1272                 os_free(iface->bss[j]);
1273         hostapd_cleanup_iface(iface);
1274 }
1275
1276
1277 struct prune_data {
1278         struct hostapd_data *hapd;
1279         const u8 *addr;
1280 };
1281
1282 static int prune_associations(struct hostapd_iface *iface, void *ctx)
1283 {
1284         struct prune_data *data = ctx;
1285         struct sta_info *osta;
1286         struct hostapd_data *ohapd;
1287         size_t j;
1288
1289         for (j = 0; j < iface->num_bss; j++) {
1290                 ohapd = iface->bss[j];
1291                 if (ohapd == data->hapd)
1292                         continue;
1293                 osta = ap_get_sta(ohapd, data->addr);
1294                 if (!osta)
1295                         continue;
1296
1297                 ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
1298         }
1299
1300         return 0;
1301 }
1302
1303 /**
1304  * hostapd_prune_associations - Remove extraneous associations
1305  * @hapd: Pointer to BSS data for the most recent association
1306  * @sta: Pointer to the associated STA data
1307  *
1308  * This function looks through all radios and BSS's for previous
1309  * (stale) associations of STA. If any are found they are removed.
1310  */
1311 static void hostapd_prune_associations(struct hostapd_data *hapd,
1312                                        struct sta_info *sta)
1313 {
1314         struct prune_data data;
1315         data.hapd = hapd;
1316         data.addr = sta->addr;
1317         hostapd_for_each_interface(hapd->iface->interfaces,
1318                                    prune_associations, &data);
1319 }
1320
1321
1322 /**
1323  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
1324  * @hapd: Pointer to BSS data
1325  * @sta: Pointer to the associated STA data
1326  * @reassoc: 1 to indicate this was a re-association; 0 = first association
1327  *
1328  * This function will be called whenever a station associates with the AP. It
1329  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
1330  * from drv_callbacks.c based on driver events for drivers that take care of
1331  * management frames (IEEE 802.11 authentication and association) internally.
1332  */
1333 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
1334                            int reassoc)
1335 {
1336         if (hapd->tkip_countermeasures) {
1337                 hapd->drv.sta_deauth(hapd, sta->addr,
1338                                      WLAN_REASON_MICHAEL_MIC_FAILURE);
1339                 return;
1340         }
1341
1342         hostapd_prune_associations(hapd, sta);
1343
1344         /* IEEE 802.11F (IAPP) */
1345         if (hapd->conf->ieee802_11f)
1346                 iapp_new_station(hapd->iapp, sta);
1347
1348         /* Start accounting here, if IEEE 802.1X and WPA are not used.
1349          * IEEE 802.1X/WPA code will start accounting after the station has
1350          * been authorized. */
1351         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
1352                 accounting_sta_start(hapd, sta);
1353
1354         /* Start IEEE 802.1X authentication process for new stations */
1355         ieee802_1x_new_station(hapd, sta);
1356         if (reassoc) {
1357                 if (sta->auth_alg != WLAN_AUTH_FT &&
1358                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
1359                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
1360         } else
1361                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
1362 }