src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "radius/radius_client.h"
  16 #include "radius/radius_das.h"
  17 #include "hostapd.h"
  18 #include "authsrv.h"
  19 #include "sta_info.h"
  20 #include "accounting.h"
  21 #include "ap_list.h"
  22 #include "beacon.h"
  23 #include "iapp.h"
  24 #include "ieee802_1x.h"
  25 #include "ieee802_11_auth.h"
  26 #include "vlan_init.h"
  27 #include "wpa_auth.h"
  28 #include "wps_hostapd.h"
  29 #include "hw_features.h"
  30 #include "wpa_auth_glue.h"
  31 #include "ap_drv_ops.h"
  32 #include "ap_config.h"
  33 #include "p2p_hostapd.h"
  34 #include "gas_serv.h"
  35 #include "dfs.h"
  36
  37
  38 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  39 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  40 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  41 static int setup_interface2(struct hostapd_iface *iface);
  42 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
  43
  44
  45 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  46                                int (*cb)(struct hostapd_iface *iface,
  47                                          void *ctx), void *ctx)
  48 {
  49         size_t i;
  50         int ret;
  51
  52         for (i = 0; i < interfaces->count; i++) {
  53                 ret = cb(interfaces->iface[i], ctx);
  54                 if (ret)
  55                         return ret;
  56         }
  57
  58         return 0;
  59 }
  60
  61
  62 static void hostapd_reload_bss(struct hostapd_data *hapd)
  63 {
  64         struct hostapd_ssid *ssid;
  65
  66 #ifndef CONFIG_NO_RADIUS
  67         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  68 #endif /* CONFIG_NO_RADIUS */
  69
  70         ssid = &hapd->conf->ssid;
  71         if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  72             ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  73                 /*
  74                  * Force PSK to be derived again since SSID or passphrase may
  75                  * have changed.
  76                  */
  77                 os_free(ssid->wpa_psk);
  78                 ssid->wpa_psk = NULL;
  79         }
  80         if (hostapd_setup_wpa_psk(hapd->conf)) {
  81                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  82                            "after reloading configuration");
  83         }
  84
  85         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  86                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  87         else
  88                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  89
  90         if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
  91                 hostapd_setup_wpa(hapd);
  92                 if (hapd->wpa_auth)
  93                         wpa_init_keys(hapd->wpa_auth);
  94         } else if (hapd->conf->wpa) {
  95                 const u8 *wpa_ie;
  96                 size_t wpa_ie_len;
  97                 hostapd_reconfig_wpa(hapd);
  98                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
  99                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
 100                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 101                                    "the kernel driver.");
 102         } else if (hapd->wpa_auth) {
 103                 wpa_deinit(hapd->wpa_auth);
 104                 hapd->wpa_auth = NULL;
 105                 hostapd_set_privacy(hapd, 0);
 106                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 107                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 108         }
 109
 110         ieee802_11_set_beacon(hapd);
 111         hostapd_update_wps(hapd);
 112
 113         if (hapd->conf->ssid.ssid_set &&
 114             hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
 115                              hapd->conf->ssid.ssid_len)) {
 116                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 117                 /* try to continue */
 118         }
 119         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 120 }
 121
 122
 123 static void hostapd_clear_old(struct hostapd_iface *iface)
 124 {
 125         size_t j;
 126
 127         /*
 128          * Deauthenticate all stations since the new configuration may not
 129          * allow them to use the BSS anymore.
 130          */
 131         for (j = 0; j < iface->num_bss; j++) {
 132                 hostapd_flush_old_stations(iface->bss[j],
 133                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 134                 hostapd_broadcast_wep_clear(iface->bss[j]);
 135
 136 #ifndef CONFIG_NO_RADIUS
 137                 /* TODO: update dynamic data based on changed configuration
 138                  * items (e.g., open/close sockets, etc.) */
 139                 radius_client_flush(iface->bss[j]->radius, 0);
 140 #endif /* CONFIG_NO_RADIUS */
 141         }
 142 }
 143
 144
 145 int hostapd_reload_config(struct hostapd_iface *iface)
 146 {
 147         struct hostapd_data *hapd = iface->bss[0];
 148         struct hostapd_config *newconf, *oldconf;
 149         size_t j;
 150
 151         if (iface->config_fname == NULL) {
 152                 /* Only in-memory config in use - assume it has been updated */
 153                 hostapd_clear_old(iface);
 154                 for (j = 0; j < iface->num_bss; j++)
 155                         hostapd_reload_bss(iface->bss[j]);
 156                 return 0;
 157         }
 158
 159         if (iface->interfaces == NULL ||
 160             iface->interfaces->config_read_cb == NULL)
 161                 return -1;
 162         newconf = iface->interfaces->config_read_cb(iface->config_fname);
 163         if (newconf == NULL)
 164                 return -1;
 165
 166         hostapd_clear_old(iface);
 167
 168         oldconf = hapd->iconf;
 169         iface->conf = newconf;
 170
 171         for (j = 0; j < iface->num_bss; j++) {
 172                 hapd = iface->bss[j];
 173                 hapd->iconf = newconf;
 174                 hapd->conf = newconf->bss[j];
 175                 hostapd_reload_bss(hapd);
 176         }
 177
 178         hostapd_config_free(oldconf);
 179
 180
 181         return 0;
 182 }
 183
 184
 185 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 186                                               char *ifname)
 187 {
 188         int i;
 189
 190         for (i = 0; i < NUM_WEP_KEYS; i++) {
 191                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 192                                         0, NULL, 0, NULL, 0)) {
 193                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 194                                    "encryption keys (ifname=%s keyidx=%d)",
 195                                    ifname, i);
 196                 }
 197         }
 198 #ifdef CONFIG_IEEE80211W
 199         if (hapd->conf->ieee80211w) {
 200                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 201                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 202                                                 NULL, i, 0, NULL,
 203                                                 0, NULL, 0)) {
 204                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 205                                            "default mgmt encryption keys "
 206                                            "(ifname=%s keyidx=%d)", ifname, i);
 207                         }
 208                 }
 209         }
 210 #endif /* CONFIG_IEEE80211W */
 211 }
 212
 213
 214 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 215 {
 216         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 217         return 0;
 218 }
 219
 220
 221 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 222 {
 223         int errors = 0, idx;
 224         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 225
 226         idx = ssid->wep.idx;
 227         if (ssid->wep.default_len &&
 228             hostapd_drv_set_key(hapd->conf->iface,
 229                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 230                                 1, NULL, 0, ssid->wep.key[idx],
 231                                 ssid->wep.len[idx])) {
 232                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 233                 errors++;
 234         }
 235
 236         return errors;
 237 }
 238
 239
 240 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 241 {
 242         if (!hapd->started) {
 243                 wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
 244                            __func__, hapd->conf->iface);
 245                 return;
 246         }
 247         hapd->started = 0;
 248
 249         wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
 250         iapp_deinit(hapd->iapp);
 251         hapd->iapp = NULL;
 252         accounting_deinit(hapd);
 253         hostapd_deinit_wpa(hapd);
 254         vlan_deinit(hapd);
 255         hostapd_acl_deinit(hapd);
 256 #ifndef CONFIG_NO_RADIUS
 257         radius_client_deinit(hapd->radius);
 258         hapd->radius = NULL;
 259         radius_das_deinit(hapd->radius_das);
 260         hapd->radius_das = NULL;
 261 #endif /* CONFIG_NO_RADIUS */
 262
 263         hostapd_deinit_wps(hapd);
 264
 265         authsrv_deinit(hapd);
 266
 267         if (hapd->interface_added &&
 268             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 269                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 270                            hapd->conf->iface);
 271         }
 272
 273         os_free(hapd->probereq_cb);
 274         hapd->probereq_cb = NULL;
 275
 276 #ifdef CONFIG_P2P
 277         wpabuf_free(hapd->p2p_beacon_ie);
 278         hapd->p2p_beacon_ie = NULL;
 279         wpabuf_free(hapd->p2p_probe_resp_ie);
 280         hapd->p2p_probe_resp_ie = NULL;
 281 #endif /* CONFIG_P2P */
 282
 283         wpabuf_free(hapd->time_adv);
 284
 285 #ifdef CONFIG_INTERWORKING
 286         gas_serv_deinit(hapd);
 287 #endif /* CONFIG_INTERWORKING */
 288
 289 #ifdef CONFIG_SQLITE
 290         os_free(hapd->tmp_eap_user.identity);
 291         os_free(hapd->tmp_eap_user.password);
 292 #endif /* CONFIG_SQLITE */
 293 }
 294
 295
 296 /**
 297  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 298  * @hapd: Pointer to BSS data
 299  *
 300  * This function is used to free all per-BSS data structures and resources.
 301  * Most of the modules that are initialized in hostapd_setup_bss() are
 302  * deinitialized here.
 303  */
 304 static void hostapd_cleanup(struct hostapd_data *hapd)
 305 {
 306         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
 307                    hapd->conf->iface);
 308         if (hapd->iface->interfaces &&
 309             hapd->iface->interfaces->ctrl_iface_deinit)
 310                 hapd->iface->interfaces->ctrl_iface_deinit(hapd);
 311         hostapd_free_hapd_data(hapd);
 312 }
 313
 314
 315 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 316 {
 317         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 318         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 319         iface->hw_features = NULL;
 320         os_free(iface->current_rates);
 321         iface->current_rates = NULL;
 322         os_free(iface->basic_rates);
 323         iface->basic_rates = NULL;
 324         ap_list_deinit(iface);
 325 }
 326
 327
 328 /**
 329  * hostapd_cleanup_iface - Complete per-interface cleanup
 330  * @iface: Pointer to interface data
 331  *
 332  * This function is called after per-BSS data structures are deinitialized
 333  * with hostapd_cleanup().
 334  */
 335 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 336 {
 337         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 338         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
 339
 340         hostapd_cleanup_iface_partial(iface);
 341         hostapd_config_free(iface->conf);
 342         iface->conf = NULL;
 343
 344         os_free(iface->config_fname);
 345         os_free(iface->bss);
 346         wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
 347         os_free(iface);
 348 }
 349
 350
 351 static void hostapd_clear_wep(struct hostapd_data *hapd)
 352 {
 353         if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
 354                 hostapd_set_privacy(hapd, 0);
 355                 hostapd_broadcast_wep_clear(hapd);
 356         }
 357 }
 358
 359
 360 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 361 {
 362         int i;
 363
 364         hostapd_broadcast_wep_set(hapd);
 365
 366         if (hapd->conf->ssid.wep.default_len) {
 367                 hostapd_set_privacy(hapd, 1);
 368                 return 0;
 369         }
 370
 371         /*
 372          * When IEEE 802.1X is not enabled, the driver may need to know how to
 373          * set authentication algorithms for static WEP.
 374          */
 375         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 376
 377         for (i = 0; i < 4; i++) {
 378                 if (hapd->conf->ssid.wep.key[i] &&
 379                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 380                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 381                                         hapd->conf->ssid.wep.key[i],
 382                                         hapd->conf->ssid.wep.len[i])) {
 383                         wpa_printf(MSG_WARNING, "Could not set WEP "
 384                                    "encryption.");
 385                         return -1;
 386                 }
 387                 if (hapd->conf->ssid.wep.key[i] &&
 388                     i == hapd->conf->ssid.wep.idx)
 389                         hostapd_set_privacy(hapd, 1);
 390         }
 391
 392         return 0;
 393 }
 394
 395
 396 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 397 {
 398         int ret = 0;
 399         u8 addr[ETH_ALEN];
 400
 401         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 402                 return 0;
 403
 404         if (!hapd->iface->driver_ap_teardown) {
 405                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 406                         "Flushing old station entries");
 407
 408                 if (hostapd_flush(hapd)) {
 409                         wpa_msg(hapd->msg_ctx, MSG_WARNING,
 410                                 "Could not connect to kernel driver");
 411                         ret = -1;
 412                 }
 413         }
 414         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 415         os_memset(addr, 0xff, ETH_ALEN);
 416         hostapd_drv_sta_deauth(hapd, addr, reason);
 417         hostapd_free_stas(hapd);
 418
 419         return ret;
 420 }
 421
 422
 423 /**
 424  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 425  * @iface: Pointer to interface data
 426  * Returns: 0 on success, -1 on failure
 427  *
 428  * This function is used to validate that the configured BSSIDs are valid.
 429  */
 430 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 431 {
 432         u8 mask[ETH_ALEN] = { 0 };
 433         struct hostapd_data *hapd = iface->bss[0];
 434         unsigned int i = iface->conf->num_bss, bits = 0, j;
 435         int auto_addr = 0;
 436
 437         if (hostapd_drv_none(hapd))
 438                 return 0;
 439
 440         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 441
 442         /* Determine the bits necessary to cover the number of BSSIDs. */
 443         for (i--; i; i >>= 1)
 444                 bits++;
 445
 446         /* Determine the bits necessary to any configured BSSIDs,
 447            if they are higher than the number of BSSIDs. */
 448         for (j = 0; j < iface->conf->num_bss; j++) {
 449                 if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
 450                         if (j)
 451                                 auto_addr++;
 452                         continue;
 453                 }
 454
 455                 for (i = 0; i < ETH_ALEN; i++) {
 456                         mask[i] |=
 457                                 iface->conf->bss[j]->bssid[i] ^
 458                                 hapd->own_addr[i];
 459                 }
 460         }
 461
 462         if (!auto_addr)
 463                 goto skip_mask_ext;
 464
 465         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 466                 ;
 467         j = 0;
 468         if (i < ETH_ALEN) {
 469                 j = (5 - i) * 8;
 470
 471                 while (mask[i] != 0) {
 472                         mask[i] >>= 1;
 473                         j++;
 474                 }
 475         }
 476
 477         if (bits < j)
 478                 bits = j;
 479
 480         if (bits > 40) {
 481                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 482                            bits);
 483                 return -1;
 484         }
 485
 486         os_memset(mask, 0xff, ETH_ALEN);
 487         j = bits / 8;
 488         for (i = 5; i > 5 - j; i--)
 489                 mask[i] = 0;
 490         j = bits % 8;
 491         while (j--)
 492                 mask[i] <<= 1;
 493
 494 skip_mask_ext:
 495         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 496                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 497
 498         if (!auto_addr)
 499                 return 0;
 500
 501         for (i = 0; i < ETH_ALEN; i++) {
 502                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 503                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 504                                    " for start address " MACSTR ".",
 505                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 506                         wpa_printf(MSG_ERROR, "Start address must be the "
 507                                    "first address in the block (i.e., addr "
 508                                    "AND mask == addr).");
 509                         return -1;
 510                 }
 511         }
 512
 513         return 0;
 514 }
 515
 516
 517 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 518 {
 519         size_t i;
 520
 521         for (i = 0; i < conf->num_bss; i++) {
 522                 if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
 523                         return 1;
 524                 }
 525         }
 526
 527         return 0;
 528 }
 529
 530
 531 #ifndef CONFIG_NO_RADIUS
 532
 533 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 534                                     struct radius_das_attrs *attr)
 535 {
 536         if (attr->nas_identifier &&
 537             (!hapd->conf->nas_identifier ||
 538              os_strlen(hapd->conf->nas_identifier) !=
 539              attr->nas_identifier_len ||
 540              os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
 541                        attr->nas_identifier_len) != 0)) {
 542                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
 543                 return 1;
 544         }
 545
 546         if (attr->nas_ip_addr &&
 547             (hapd->conf->own_ip_addr.af != AF_INET ||
 548              os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
 549              0)) {
 550                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
 551                 return 1;
 552         }
 553
 554 #ifdef CONFIG_IPV6
 555         if (attr->nas_ipv6_addr &&
 556             (hapd->conf->own_ip_addr.af != AF_INET6 ||
 557              os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
 558              != 0)) {
 559                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
 560                 return 1;
 561         }
 562 #endif /* CONFIG_IPV6 */
 563
 564         return 0;
 565 }
 566
 567
 568 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 569                                               struct radius_das_attrs *attr)
 570 {
 571         struct sta_info *sta = NULL;
 572         char buf[128];
 573
 574         if (attr->sta_addr)
 575                 sta = ap_get_sta(hapd, attr->sta_addr);
 576
 577         if (sta == NULL && attr->acct_session_id &&
 578             attr->acct_session_id_len == 17) {
 579                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 580                         os_snprintf(buf, sizeof(buf), "%08X-%08X",
 581                                     sta->acct_session_id_hi,
 582                                     sta->acct_session_id_lo);
 583                         if (os_memcmp(attr->acct_session_id, buf, 17) == 0)
 584                                 break;
 585                 }
 586         }
 587
 588         if (sta == NULL && attr->cui) {
 589                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 590                         struct wpabuf *cui;
 591                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 592                         if (cui && wpabuf_len(cui) == attr->cui_len &&
 593                             os_memcmp(wpabuf_head(cui), attr->cui,
 594                                       attr->cui_len) == 0)
 595                                 break;
 596                 }
 597         }
 598
 599         if (sta == NULL && attr->user_name) {
 600                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 601                         u8 *identity;
 602                         size_t identity_len;
 603                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 604                                                            &identity_len);
 605                         if (identity &&
 606                             identity_len == attr->user_name_len &&
 607                             os_memcmp(identity, attr->user_name, identity_len)
 608                             == 0)
 609                                 break;
 610                 }
 611         }
 612
 613         return sta;
 614 }
 615
 616
 617 static enum radius_das_res
 618 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 619 {
 620         struct hostapd_data *hapd = ctx;
 621         struct sta_info *sta;
 622
 623         if (hostapd_das_nas_mismatch(hapd, attr))
 624                 return RADIUS_DAS_NAS_MISMATCH;
 625
 626         sta = hostapd_das_find_sta(hapd, attr);
 627         if (sta == NULL)
 628                 return RADIUS_DAS_SESSION_NOT_FOUND;
 629
 630         wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
 631
 632         hostapd_drv_sta_deauth(hapd, sta->addr,
 633                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 634         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 635
 636         return RADIUS_DAS_SUCCESS;
 637 }
 638
 639 #endif /* CONFIG_NO_RADIUS */
 640
 641
 642 /**
 643  * hostapd_setup_bss - Per-BSS setup (initialization)
 644  * @hapd: Pointer to BSS data
 645  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
 646  *      but interface may exist
 647  *
 648  * This function is used to initialize all per-BSS data structures and
 649  * resources. This gets called in a loop for each BSS when an interface is
 650  * initialized. Most of the modules that are initialized here will be
 651  * deinitialized in hostapd_cleanup().
 652  */
 653 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 654 {
 655         struct hostapd_bss_config *conf = hapd->conf;
 656         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 657         int ssid_len, set_ssid;
 658         char force_ifname[IFNAMSIZ];
 659         u8 if_addr[ETH_ALEN];
 660
 661         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 662                    __func__, hapd, hapd->conf->iface, first);
 663
 664         if (hapd->started) {
 665                 wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
 666                            __func__, hapd->conf->iface);
 667                 return -1;
 668         }
 669         hapd->started = 1;
 670
 671         if (!first || first == -1) {
 672                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 673                         /* Allocate the next available BSSID. */
 674                         do {
 675                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 676                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 677                 } else {
 678                         /* Allocate the configured BSSID. */
 679                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 680
 681                         if (hostapd_mac_comp(hapd->own_addr,
 682                                              hapd->iface->bss[0]->own_addr) ==
 683                             0) {
 684                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 685                                            "BSSID set to the MAC address of "
 686                                            "the radio", hapd->conf->iface);
 687                                 return -1;
 688                         }
 689                 }
 690
 691                 hapd->interface_added = 1;
 692                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 693                                    hapd->conf->iface, hapd->own_addr, hapd,
 694                                    &hapd->drv_priv, force_ifname, if_addr,
 695                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 696                                    NULL, first == -1)) {
 697                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 698                                    MACSTR ")", MAC2STR(hapd->own_addr));
 699                         hapd->interface_added = 0;
 700                         return -1;
 701                 }
 702         }
 703
 704         if (conf->wmm_enabled < 0)
 705                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 706
 707         hostapd_flush_old_stations(hapd, WLAN_REASON_PREV_AUTH_NOT_VALID);
 708         hostapd_set_privacy(hapd, 0);
 709
 710         hostapd_broadcast_wep_clear(hapd);
 711         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 712                 return -1;
 713
 714         /*
 715          * Fetch the SSID from the system and use it or,
 716          * if one was specified in the config file, verify they
 717          * match.
 718          */
 719         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 720         if (ssid_len < 0) {
 721                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 722                 return -1;
 723         }
 724         if (conf->ssid.ssid_set) {
 725                 /*
 726                  * If SSID is specified in the config file and it differs
 727                  * from what is being used then force installation of the
 728                  * new SSID.
 729                  */
 730                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 731                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 732         } else {
 733                 /*
 734                  * No SSID in the config file; just use the one we got
 735                  * from the system.
 736                  */
 737                 set_ssid = 0;
 738                 conf->ssid.ssid_len = ssid_len;
 739                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 740         }
 741
 742         if (!hostapd_drv_none(hapd)) {
 743                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 744                            " and ssid \"%s\"",
 745                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 746                            wpa_ssid_txt(hapd->conf->ssid.ssid,
 747                                         hapd->conf->ssid.ssid_len));
 748         }
 749
 750         if (hostapd_setup_wpa_psk(conf)) {
 751                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 752                 return -1;
 753         }
 754
 755         /* Set SSID for the kernel driver (to be used in beacon and probe
 756          * response frames) */
 757         if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
 758                                          conf->ssid.ssid_len)) {
 759                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 760                 return -1;
 761         }
 762
 763         if (wpa_debug_level == MSG_MSGDUMP)
 764                 conf->radius->msg_dumps = 1;
 765 #ifndef CONFIG_NO_RADIUS
 766         hapd->radius = radius_client_init(hapd, conf->radius);
 767         if (hapd->radius == NULL) {
 768                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 769                 return -1;
 770         }
 771
 772         if (hapd->conf->radius_das_port) {
 773                 struct radius_das_conf das_conf;
 774                 os_memset(&das_conf, 0, sizeof(das_conf));
 775                 das_conf.port = hapd->conf->radius_das_port;
 776                 das_conf.shared_secret = hapd->conf->radius_das_shared_secret;
 777                 das_conf.shared_secret_len =
 778                         hapd->conf->radius_das_shared_secret_len;
 779                 das_conf.client_addr = &hapd->conf->radius_das_client_addr;
 780                 das_conf.time_window = hapd->conf->radius_das_time_window;
 781                 das_conf.require_event_timestamp =
 782                         hapd->conf->radius_das_require_event_timestamp;
 783                 das_conf.ctx = hapd;
 784                 das_conf.disconnect = hostapd_das_disconnect;
 785                 hapd->radius_das = radius_das_init(&das_conf);
 786                 if (hapd->radius_das == NULL) {
 787                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
 788                                    "failed.");
 789                         return -1;
 790                 }
 791         }
 792 #endif /* CONFIG_NO_RADIUS */
 793
 794         if (hostapd_acl_init(hapd)) {
 795                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 796                 return -1;
 797         }
 798         if (hostapd_init_wps(hapd, conf))
 799                 return -1;
 800
 801         if (authsrv_init(hapd) < 0)
 802                 return -1;
 803
 804         if (ieee802_1x_init(hapd)) {
 805                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 806                 return -1;
 807         }
 808
 809         if ((hapd->conf->wpa || hapd->conf->osen) && hostapd_setup_wpa(hapd))
 810                 return -1;
 811
 812         if (accounting_init(hapd)) {
 813                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 814                 return -1;
 815         }
 816
 817         if (hapd->conf->ieee802_11f &&
 818             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 819                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 820                            "failed.");
 821                 return -1;
 822         }
 823
 824 #ifdef CONFIG_INTERWORKING
 825         if (gas_serv_init(hapd)) {
 826                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
 827                 return -1;
 828         }
 829
 830         if (conf->qos_map_set_len &&
 831             hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
 832                                     conf->qos_map_set_len)) {
 833                 wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
 834                 return -1;
 835         }
 836 #endif /* CONFIG_INTERWORKING */
 837
 838         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 839                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 840                 return -1;
 841         }
 842
 843         if (!hapd->conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
 844                 return -1;
 845
 846         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 847                 return -1;
 848
 849         if (hapd->driver && hapd->driver->set_operstate)
 850                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 851
 852         return 0;
 853 }
 854
 855
 856 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 857 {
 858         struct hostapd_data *hapd = iface->bss[0];
 859         int i;
 860         struct hostapd_tx_queue_params *p;
 861
 862         for (i = 0; i < NUM_TX_QUEUES; i++) {
 863                 p = &iface->conf->tx_queue[i];
 864
 865                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 866                                                 p->cwmax, p->burst)) {
 867                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 868                                    "parameters for queue %d.", i);
 869                         /* Continue anyway */
 870                 }
 871         }
 872 }
 873
 874
 875 static int hostapd_set_acl_list(struct hostapd_data *hapd,
 876                                 struct mac_acl_entry *mac_acl,
 877                                 int n_entries, u8 accept_acl)
 878 {
 879         struct hostapd_acl_params *acl_params;
 880         int i, err;
 881
 882         acl_params = os_zalloc(sizeof(*acl_params) +
 883                                (n_entries * sizeof(acl_params->mac_acl[0])));
 884         if (!acl_params)
 885                 return -ENOMEM;
 886
 887         for (i = 0; i < n_entries; i++)
 888                 os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
 889                           ETH_ALEN);
 890
 891         acl_params->acl_policy = accept_acl;
 892         acl_params->num_mac_acl = n_entries;
 893
 894         err = hostapd_drv_set_acl(hapd, acl_params);
 895
 896         os_free(acl_params);
 897
 898         return err;
 899 }
 900
 901
 902 static void hostapd_set_acl(struct hostapd_data *hapd)
 903 {
 904         struct hostapd_config *conf = hapd->iconf;
 905         int err;
 906         u8 accept_acl;
 907
 908         if (hapd->iface->drv_max_acl_mac_addrs == 0)
 909                 return;
 910         if (!(conf->bss[0]->num_accept_mac || conf->bss[0]->num_deny_mac))
 911                 return;
 912
 913         if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
 914                 if (conf->bss[0]->num_accept_mac) {
 915                         accept_acl = 1;
 916                         err = hostapd_set_acl_list(hapd,
 917                                                    conf->bss[0]->accept_mac,
 918                                                    conf->bss[0]->num_accept_mac,
 919                                                    accept_acl);
 920                         if (err) {
 921                                 wpa_printf(MSG_DEBUG, "Failed to set accept acl");
 922                                 return;
 923                         }
 924                 } else {
 925                         wpa_printf(MSG_DEBUG, "Mismatch between ACL Policy & Accept/deny lists file");
 926                 }
 927         } else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
 928                 if (conf->bss[0]->num_deny_mac) {
 929                         accept_acl = 0;
 930                         err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
 931                                                    conf->bss[0]->num_deny_mac,
 932                                                    accept_acl);
 933                         if (err) {
 934                                 wpa_printf(MSG_DEBUG, "Failed to set deny acl");
 935                                 return;
 936                         }
 937                 } else {
 938                         wpa_printf(MSG_DEBUG, "Mismatch between ACL Policy & Accept/deny lists file");
 939                 }
 940         }
 941 }
 942
 943
 944 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
 945 {
 946         if (!hapd->iface->interfaces ||
 947             !hapd->iface->interfaces->ctrl_iface_init)
 948                 return 0;
 949
 950         if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
 951                 wpa_printf(MSG_ERROR,
 952                            "Failed to setup control interface for %s",
 953                            hapd->conf->iface);
 954                 return -1;
 955         }
 956
 957         return 0;
 958 }
 959
 960
 961 static int start_ctrl_iface(struct hostapd_iface *iface)
 962 {
 963         size_t i;
 964
 965         if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
 966                 return 0;
 967
 968         for (i = 0; i < iface->num_bss; i++) {
 969                 struct hostapd_data *hapd = iface->bss[i];
 970                 if (iface->interfaces->ctrl_iface_init(hapd)) {
 971                         wpa_printf(MSG_ERROR,
 972                                    "Failed to setup control interface for %s",
 973                                    hapd->conf->iface);
 974                         return -1;
 975                 }
 976         }
 977
 978         return 0;
 979 }
 980
 981
 982 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
 983 {
 984         struct hostapd_iface *iface = eloop_ctx;
 985
 986         if (!iface->wait_channel_update) {
 987                 wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
 988                 return;
 989         }
 990
 991         /*
 992          * It is possible that the existing channel list is acceptable, so try
 993          * to proceed.
 994          */
 995         wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
 996         setup_interface2(iface);
 997 }
 998
 999
1000 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1001 {
1002         if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1003                 return;
1004
1005         wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1006         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1007         setup_interface2(iface);
1008 }
1009
1010
1011 static int setup_interface(struct hostapd_iface *iface)
1012 {
1013         struct hostapd_data *hapd = iface->bss[0];
1014         size_t i;
1015
1016         /*
1017          * It is possible that setup_interface() is called after the interface
1018          * was disabled etc., in which case driver_ap_teardown is possibly set
1019          * to 1. Clear it here so any other key/station deletion, which is not
1020          * part of a teardown flow, would also call the relevant driver
1021          * callbacks.
1022          */
1023         iface->driver_ap_teardown = 0;
1024
1025         if (!iface->phy[0]) {
1026                 const char *phy = hostapd_drv_get_radio_name(hapd);
1027                 if (phy) {
1028                         wpa_printf(MSG_DEBUG, "phy: %s", phy);
1029                         os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1030                 }
1031         }
1032
1033         /*
1034          * Make sure that all BSSes get configured with a pointer to the same
1035          * driver interface.
1036          */
1037         for (i = 1; i < iface->num_bss; i++) {
1038                 iface->bss[i]->driver = hapd->driver;
1039                 iface->bss[i]->drv_priv = hapd->drv_priv;
1040         }
1041
1042         if (hostapd_validate_bssid_configuration(iface))
1043                 return -1;
1044
1045         /*
1046          * Initialize control interfaces early to allow external monitoring of
1047          * channel setup operations that may take considerable amount of time
1048          * especially for DFS cases.
1049          */
1050         if (start_ctrl_iface(iface))
1051                 return -1;
1052
1053         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1054                 char country[4], previous_country[4];
1055
1056                 hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1057                 if (hostapd_get_country(hapd, previous_country) < 0)
1058                         previous_country[0] = '\0';
1059
1060                 os_memcpy(country, hapd->iconf->country, 3);
1061                 country[3] = '\0';
1062                 if (hostapd_set_country(hapd, country) < 0) {
1063                         wpa_printf(MSG_ERROR, "Failed to set country code");
1064                         return -1;
1065                 }
1066
1067                 wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1068                            previous_country, country);
1069
1070                 if (os_strncmp(previous_country, country, 2) != 0) {
1071                         wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1072                         iface->wait_channel_update = 1;
1073                         eloop_register_timeout(5, 0,
1074                                                channel_list_update_timeout,
1075                                                iface, NULL);
1076                         return 0;
1077                 }
1078         }
1079
1080         return setup_interface2(iface);
1081 }
1082
1083
1084 static int setup_interface2(struct hostapd_iface *iface)
1085 {
1086         iface->wait_channel_update = 0;
1087
1088         if (hostapd_get_hw_features(iface)) {
1089                 /* Not all drivers support this yet, so continue without hw
1090                  * feature data. */
1091         } else {
1092                 int ret = hostapd_select_hw_mode(iface);
1093                 if (ret < 0) {
1094                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1095                                    "channel. (%d)", ret);
1096                         return -1;
1097                 }
1098                 if (ret == 1) {
1099                         wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1100                         return 0;
1101                 }
1102                 ret = hostapd_check_ht_capab(iface);
1103                 if (ret < 0)
1104                         return -1;
1105                 if (ret == 1) {
1106                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1107                                    "be completed in a callback");
1108                         return 0;
1109                 }
1110
1111                 if (iface->conf->ieee80211h)
1112                         wpa_printf(MSG_DEBUG, "DFS support is enabled");
1113         }
1114         return hostapd_setup_interface_complete(iface, 0);
1115 }
1116
1117
1118 /**
1119  * hostapd_setup_interface_complete - Complete interface setup
1120  *
1121  * This function is called when previous steps in the interface setup has been
1122  * completed. This can also start operations, e.g., DFS, that will require
1123  * additional processing before interface is ready to be enabled. Such
1124  * operations will call this function from eloop callbacks when finished.
1125  */
1126 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1127 {
1128         struct hostapd_data *hapd = iface->bss[0];
1129         size_t j;
1130         u8 *prev_addr;
1131
1132         if (err) {
1133                 wpa_printf(MSG_ERROR, "Interface initialization failed");
1134                 hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1135                 if (iface->interfaces && iface->interfaces->terminate_on_error)
1136                         eloop_terminate();
1137                 return -1;
1138         }
1139
1140         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1141         if (iface->conf->channel) {
1142 #ifdef NEED_AP_MLME
1143                 int res;
1144 #endif /* NEED_AP_MLME */
1145
1146                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1147                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1148                            "Frequency: %d MHz",
1149                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1150                            iface->conf->channel, iface->freq);
1151
1152 #ifdef NEED_AP_MLME
1153                 /* Check DFS */
1154                 res = hostapd_handle_dfs(iface);
1155                 if (res <= 0)
1156                         return res;
1157 #endif /* NEED_AP_MLME */
1158
1159                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1160                                      hapd->iconf->channel,
1161                                      hapd->iconf->ieee80211n,
1162                                      hapd->iconf->ieee80211ac,
1163                                      hapd->iconf->secondary_channel,
1164                                      hapd->iconf->vht_oper_chwidth,
1165                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1166                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1167                         wpa_printf(MSG_ERROR, "Could not set channel for "
1168                                    "kernel driver");
1169                         return -1;
1170                 }
1171         }
1172
1173         if (iface->current_mode) {
1174                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1175                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1176                                    "table.");
1177                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1178                                        HOSTAPD_LEVEL_WARNING,
1179                                        "Failed to prepare rates table.");
1180                         return -1;
1181                 }
1182         }
1183
1184         if (hapd->iconf->rts_threshold > -1 &&
1185             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1186                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1187                            "kernel driver");
1188                 return -1;
1189         }
1190
1191         if (hapd->iconf->fragm_threshold > -1 &&
1192             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1193                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1194                            "for kernel driver");
1195                 return -1;
1196         }
1197
1198         prev_addr = hapd->own_addr;
1199
1200         for (j = 0; j < iface->num_bss; j++) {
1201                 hapd = iface->bss[j];
1202                 if (j)
1203                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1204                 if (hostapd_setup_bss(hapd, j == 0))
1205                         return -1;
1206                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1207                         prev_addr = hapd->own_addr;
1208         }
1209         hapd = iface->bss[0];
1210
1211         hostapd_tx_queue_params(iface);
1212
1213         ap_list_init(iface);
1214
1215         hostapd_set_acl(hapd);
1216
1217         if (hostapd_driver_commit(hapd) < 0) {
1218                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1219                            "configuration", __func__);
1220                 return -1;
1221         }
1222
1223         /*
1224          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1225          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1226          * mode), the interface is up only after driver_commit, so initialize
1227          * WPS after driver_commit.
1228          */
1229         for (j = 0; j < iface->num_bss; j++) {
1230                 if (hostapd_init_wps_complete(iface->bss[j]))
1231                         return -1;
1232         }
1233
1234         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1235         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1236         if (hapd->setup_complete_cb)
1237                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1238
1239         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1240                    iface->bss[0]->conf->iface);
1241         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1242                 iface->interfaces->terminate_on_error--;
1243
1244         return 0;
1245 }
1246
1247
1248 /**
1249  * hostapd_setup_interface - Setup of an interface
1250  * @iface: Pointer to interface data.
1251  * Returns: 0 on success, -1 on failure
1252  *
1253  * Initializes the driver interface, validates the configuration,
1254  * and sets driver parameters based on the configuration.
1255  * Flushes old stations, sets the channel, encryption,
1256  * beacons, and WDS links based on the configuration.
1257  *
1258  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1259  * or DFS operations, this function returns 0 before such operations have been
1260  * completed. The pending operations are registered into eloop and will be
1261  * completed from eloop callbacks. Those callbacks end up calling
1262  * hostapd_setup_interface_complete() once setup has been completed.
1263  */
1264 int hostapd_setup_interface(struct hostapd_iface *iface)
1265 {
1266         int ret;
1267
1268         ret = setup_interface(iface);
1269         if (ret) {
1270                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1271                            iface->bss[0]->conf->iface);
1272                 return -1;
1273         }
1274
1275         return 0;
1276 }
1277
1278
1279 /**
1280  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1281  * @hapd_iface: Pointer to interface data
1282  * @conf: Pointer to per-interface configuration
1283  * @bss: Pointer to per-BSS configuration for this BSS
1284  * Returns: Pointer to allocated BSS data
1285  *
1286  * This function is used to allocate per-BSS data structure. This data will be
1287  * freed after hostapd_cleanup() is called for it during interface
1288  * deinitialization.
1289  */
1290 struct hostapd_data *
1291 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1292                        struct hostapd_config *conf,
1293                        struct hostapd_bss_config *bss)
1294 {
1295         struct hostapd_data *hapd;
1296
1297         hapd = os_zalloc(sizeof(*hapd));
1298         if (hapd == NULL)
1299                 return NULL;
1300
1301         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1302         hapd->iconf = conf;
1303         hapd->conf = bss;
1304         hapd->iface = hapd_iface;
1305         hapd->driver = hapd->iconf->driver;
1306         hapd->ctrl_sock = -1;
1307
1308         return hapd;
1309 }
1310
1311
1312 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1313 {
1314         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1315                    hapd->conf->iface);
1316         hostapd_free_stas(hapd);
1317         hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
1318         hostapd_clear_wep(hapd);
1319         hostapd_cleanup(hapd);
1320 }
1321
1322
1323 void hostapd_interface_deinit(struct hostapd_iface *iface)
1324 {
1325         int j;
1326
1327         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1328         if (iface == NULL)
1329                 return;
1330
1331         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1332         iface->wait_channel_update = 0;
1333
1334         for (j = iface->num_bss - 1; j >= 0; j--)
1335                 hostapd_bss_deinit(iface->bss[j]);
1336 }
1337
1338
1339 void hostapd_interface_free(struct hostapd_iface *iface)
1340 {
1341         size_t j;
1342         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1343         for (j = 0; j < iface->num_bss; j++) {
1344                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1345                            __func__, iface->bss[j]);
1346                 os_free(iface->bss[j]);
1347         }
1348         hostapd_cleanup_iface(iface);
1349 }
1350
1351
1352 /**
1353  * hostapd_init - Allocate and initialize per-interface data
1354  * @config_file: Path to the configuration file
1355  * Returns: Pointer to the allocated interface data or %NULL on failure
1356  *
1357  * This function is used to allocate main data structures for per-interface
1358  * data. The allocated data buffer will be freed by calling
1359  * hostapd_cleanup_iface().
1360  */
1361 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1362                                     const char *config_file)
1363 {
1364         struct hostapd_iface *hapd_iface = NULL;
1365         struct hostapd_config *conf = NULL;
1366         struct hostapd_data *hapd;
1367         size_t i;
1368
1369         hapd_iface = os_zalloc(sizeof(*hapd_iface));
1370         if (hapd_iface == NULL)
1371                 goto fail;
1372
1373         hapd_iface->config_fname = os_strdup(config_file);
1374         if (hapd_iface->config_fname == NULL)
1375                 goto fail;
1376
1377         conf = interfaces->config_read_cb(hapd_iface->config_fname);
1378         if (conf == NULL)
1379                 goto fail;
1380         hapd_iface->conf = conf;
1381
1382         hapd_iface->num_bss = conf->num_bss;
1383         hapd_iface->bss = os_calloc(conf->num_bss,
1384                                     sizeof(struct hostapd_data *));
1385         if (hapd_iface->bss == NULL)
1386                 goto fail;
1387
1388         for (i = 0; i < conf->num_bss; i++) {
1389                 hapd = hapd_iface->bss[i] =
1390                         hostapd_alloc_bss_data(hapd_iface, conf,
1391                                                conf->bss[i]);
1392                 if (hapd == NULL)
1393                         goto fail;
1394                 hapd->msg_ctx = hapd;
1395         }
1396
1397         return hapd_iface;
1398
1399 fail:
1400         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1401                    config_file);
1402         if (conf)
1403                 hostapd_config_free(conf);
1404         if (hapd_iface) {
1405                 os_free(hapd_iface->config_fname);
1406                 os_free(hapd_iface->bss);
1407                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1408                            __func__, hapd_iface);
1409                 os_free(hapd_iface);
1410         }
1411         return NULL;
1412 }
1413
1414
1415 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1416 {
1417         size_t i, j;
1418
1419         for (i = 0; i < interfaces->count; i++) {
1420                 struct hostapd_iface *iface = interfaces->iface[i];
1421                 for (j = 0; j < iface->num_bss; j++) {
1422                         struct hostapd_data *hapd = iface->bss[j];
1423                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
1424                                 return 1;
1425                 }
1426         }
1427
1428         return 0;
1429 }
1430
1431
1432 /**
1433  * hostapd_interface_init_bss - Read configuration file and init BSS data
1434  *
1435  * This function is used to parse configuration file for a BSS. This BSS is
1436  * added to an existing interface sharing the same radio (if any) or a new
1437  * interface is created if this is the first interface on a radio. This
1438  * allocate memory for the BSS. No actual driver operations are started.
1439  *
1440  * This is similar to hostapd_interface_init(), but for a case where the
1441  * configuration is used to add a single BSS instead of all BSSes for a radio.
1442  */
1443 struct hostapd_iface *
1444 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
1445                            const char *config_fname, int debug)
1446 {
1447         struct hostapd_iface *new_iface = NULL, *iface = NULL;
1448         struct hostapd_data *hapd;
1449         int k;
1450         size_t i, bss_idx;
1451
1452         if (!phy || !*phy)
1453                 return NULL;
1454
1455         for (i = 0; i < interfaces->count; i++) {
1456                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
1457                         iface = interfaces->iface[i];
1458                         break;
1459                 }
1460         }
1461
1462         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
1463                    config_fname, phy, iface ? "" : " --> new PHY");
1464         if (iface) {
1465                 struct hostapd_config *conf;
1466                 struct hostapd_bss_config **tmp_conf;
1467                 struct hostapd_data **tmp_bss;
1468                 struct hostapd_bss_config *bss;
1469                 const char *ifname;
1470
1471                 /* Add new BSS to existing iface */
1472                 conf = interfaces->config_read_cb(config_fname);
1473                 if (conf == NULL)
1474                         return NULL;
1475                 if (conf->num_bss > 1) {
1476                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
1477                         hostapd_config_free(conf);
1478                         return NULL;
1479                 }
1480
1481                 ifname = conf->bss[0]->iface;
1482                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
1483                         wpa_printf(MSG_ERROR,
1484                                    "Interface name %s already in use", ifname);
1485                         hostapd_config_free(conf);
1486                         return NULL;
1487                 }
1488
1489                 tmp_conf = os_realloc_array(
1490                         iface->conf->bss, iface->conf->num_bss + 1,
1491                         sizeof(struct hostapd_bss_config *));
1492                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
1493                                            sizeof(struct hostapd_data *));
1494                 if (tmp_bss)
1495                         iface->bss = tmp_bss;
1496                 if (tmp_conf) {
1497                         iface->conf->bss = tmp_conf;
1498                         iface->conf->last_bss = tmp_conf[0];
1499                 }
1500                 if (tmp_bss == NULL || tmp_conf == NULL) {
1501                         hostapd_config_free(conf);
1502                         return NULL;
1503                 }
1504                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
1505                 iface->conf->num_bss++;
1506
1507                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
1508                 if (hapd == NULL) {
1509                         iface->conf->num_bss--;
1510                         hostapd_config_free(conf);
1511                         return NULL;
1512                 }
1513                 iface->conf->last_bss = bss;
1514                 iface->bss[iface->num_bss] = hapd;
1515                 hapd->msg_ctx = hapd;
1516
1517                 bss_idx = iface->num_bss++;
1518                 conf->num_bss--;
1519                 conf->bss[0] = NULL;
1520                 hostapd_config_free(conf);
1521         } else {
1522                 /* Add a new iface with the first BSS */
1523                 new_iface = iface = hostapd_init(interfaces, config_fname);
1524                 if (!iface)
1525                         return NULL;
1526                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1527                 iface->interfaces = interfaces;
1528                 bss_idx = 0;
1529         }
1530
1531         for (k = 0; k < debug; k++) {
1532                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
1533                         iface->bss[bss_idx]->conf->logger_stdout_level--;
1534         }
1535
1536         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
1537             !hostapd_drv_none(iface->bss[bss_idx])) {
1538                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
1539                            config_fname);
1540                 if (new_iface)
1541                         hostapd_interface_deinit_free(new_iface);
1542                 return NULL;
1543         }
1544
1545         return iface;
1546 }
1547
1548
1549 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
1550 {
1551         const struct wpa_driver_ops *driver;
1552         void *drv_priv;
1553
1554         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1555         if (iface == NULL)
1556                 return;
1557         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
1558                    __func__, (unsigned int) iface->num_bss,
1559                    (unsigned int) iface->conf->num_bss);
1560         driver = iface->bss[0]->driver;
1561         drv_priv = iface->bss[0]->drv_priv;
1562         hostapd_interface_deinit(iface);
1563         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1564                    __func__, driver, drv_priv);
1565         if (driver && driver->hapd_deinit && drv_priv)
1566                 driver->hapd_deinit(drv_priv);
1567         hostapd_interface_free(iface);
1568 }
1569
1570
1571 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
1572 {
1573         if (hapd_iface->bss[0]->drv_priv != NULL) {
1574                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
1575                            hapd_iface->conf->bss[0]->iface);
1576                 return -1;
1577         }
1578
1579         wpa_printf(MSG_DEBUG, "Enable interface %s",
1580                    hapd_iface->conf->bss[0]->iface);
1581
1582         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1583                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
1584                 return -1;
1585         }
1586
1587         if (hapd_iface->interfaces == NULL ||
1588             hapd_iface->interfaces->driver_init == NULL ||
1589             hapd_iface->interfaces->driver_init(hapd_iface))
1590                 return -1;
1591
1592         if (hostapd_setup_interface(hapd_iface)) {
1593                 const struct wpa_driver_ops *driver;
1594                 void *drv_priv;
1595
1596                 driver = hapd_iface->bss[0]->driver;
1597                 drv_priv = hapd_iface->bss[0]->drv_priv;
1598                 wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1599                            __func__, driver, drv_priv);
1600                 if (driver && driver->hapd_deinit && drv_priv) {
1601                         driver->hapd_deinit(drv_priv);
1602                         hapd_iface->bss[0]->drv_priv = NULL;
1603                 }
1604                 return -1;
1605         }
1606
1607         return 0;
1608 }
1609
1610
1611 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
1612 {
1613         size_t j;
1614
1615         wpa_printf(MSG_DEBUG, "Reload interface %s",
1616                    hapd_iface->conf->bss[0]->iface);
1617         for (j = 0; j < hapd_iface->num_bss; j++)
1618                 hostapd_set_security_params(hapd_iface->conf->bss[j]);
1619         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1620                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
1621                 return -1;
1622         }
1623         hostapd_clear_old(hapd_iface);
1624         for (j = 0; j < hapd_iface->num_bss; j++)
1625                 hostapd_reload_bss(hapd_iface->bss[j]);
1626
1627         return 0;
1628 }
1629
1630
1631 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
1632 {
1633         size_t j;
1634         const struct wpa_driver_ops *driver;
1635         void *drv_priv;
1636
1637         if (hapd_iface == NULL)
1638                 return -1;
1639         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1640         driver = hapd_iface->bss[0]->driver;
1641         drv_priv = hapd_iface->bss[0]->drv_priv;
1642
1643         hapd_iface->driver_ap_teardown =
1644                 !!(hapd_iface->drv_flags &
1645                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
1646
1647         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
1648         for (j = 0; j < hapd_iface->num_bss; j++) {
1649                 struct hostapd_data *hapd = hapd_iface->bss[j];
1650                 hostapd_free_stas(hapd);
1651                 hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
1652                 hostapd_clear_wep(hapd);
1653                 hostapd_free_hapd_data(hapd);
1654         }
1655
1656         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1657                    __func__, driver, drv_priv);
1658         if (driver && driver->hapd_deinit && drv_priv) {
1659                 driver->hapd_deinit(drv_priv);
1660                 hapd_iface->bss[0]->drv_priv = NULL;
1661         }
1662
1663         /* From hostapd_cleanup_iface: These were initialized in
1664          * hostapd_setup_interface and hostapd_setup_interface_complete
1665          */
1666         hostapd_cleanup_iface_partial(hapd_iface);
1667
1668         wpa_printf(MSG_DEBUG, "Interface %s disabled",
1669                    hapd_iface->bss[0]->conf->iface);
1670         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
1671         return 0;
1672 }
1673
1674
1675 static struct hostapd_iface *
1676 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
1677 {
1678         struct hostapd_iface **iface, *hapd_iface;
1679
1680         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
1681                                  sizeof(struct hostapd_iface *));
1682         if (iface == NULL)
1683                 return NULL;
1684         interfaces->iface = iface;
1685         hapd_iface = interfaces->iface[interfaces->count] =
1686                 os_zalloc(sizeof(*hapd_iface));
1687         if (hapd_iface == NULL) {
1688                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
1689                            "the interface", __func__);
1690                 return NULL;
1691         }
1692         interfaces->count++;
1693         hapd_iface->interfaces = interfaces;
1694
1695         return hapd_iface;
1696 }
1697
1698
1699 static struct hostapd_config *
1700 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
1701                      const char *ctrl_iface)
1702 {
1703         struct hostapd_bss_config *bss;
1704         struct hostapd_config *conf;
1705
1706         /* Allocates memory for bss and conf */
1707         conf = hostapd_config_defaults();
1708         if (conf == NULL) {
1709                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
1710                                 "configuration", __func__);
1711                 return NULL;
1712         }
1713
1714         conf->driver = wpa_drivers[0];
1715         if (conf->driver == NULL) {
1716                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
1717                 hostapd_config_free(conf);
1718                 return NULL;
1719         }
1720
1721         bss = conf->last_bss = conf->bss[0];
1722
1723         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
1724         bss->ctrl_interface = os_strdup(ctrl_iface);
1725         if (bss->ctrl_interface == NULL) {
1726                 hostapd_config_free(conf);
1727                 return NULL;
1728         }
1729
1730         /* Reading configuration file skipped, will be done in SET!
1731          * From reading the configuration till the end has to be done in
1732          * SET
1733          */
1734         return conf;
1735 }
1736
1737
1738 static struct hostapd_iface * hostapd_data_alloc(
1739         struct hapd_interfaces *interfaces, struct hostapd_config *conf)
1740 {
1741         size_t i;
1742         struct hostapd_iface *hapd_iface =
1743                 interfaces->iface[interfaces->count - 1];
1744         struct hostapd_data *hapd;
1745
1746         hapd_iface->conf = conf;
1747         hapd_iface->num_bss = conf->num_bss;
1748
1749         hapd_iface->bss = os_zalloc(conf->num_bss *
1750                                     sizeof(struct hostapd_data *));
1751         if (hapd_iface->bss == NULL)
1752                 return NULL;
1753
1754         for (i = 0; i < conf->num_bss; i++) {
1755                 hapd = hapd_iface->bss[i] =
1756                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
1757                 if (hapd == NULL)
1758                         return NULL;
1759                 hapd->msg_ctx = hapd;
1760         }
1761
1762         hapd_iface->interfaces = interfaces;
1763
1764         return hapd_iface;
1765 }
1766
1767
1768 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
1769 {
1770         struct hostapd_config *conf = NULL;
1771         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
1772         struct hostapd_data *hapd;
1773         char *ptr;
1774         size_t i, j;
1775         const char *conf_file = NULL, *phy_name = NULL;
1776
1777         if (os_strncmp(buf, "bss_config=", 11) == 0) {
1778                 char *pos;
1779                 phy_name = buf + 11;
1780                 pos = os_strchr(phy_name, ':');
1781                 if (!pos)
1782                         return -1;
1783                 *pos++ = '\0';
1784                 conf_file = pos;
1785                 if (!os_strlen(conf_file))
1786                         return -1;
1787
1788                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
1789                                                         conf_file, 0);
1790                 if (!hapd_iface)
1791                         return -1;
1792                 for (j = 0; j < interfaces->count; j++) {
1793                         if (interfaces->iface[j] == hapd_iface)
1794                                 break;
1795                 }
1796                 if (j == interfaces->count) {
1797                         struct hostapd_iface **tmp;
1798                         tmp = os_realloc_array(interfaces->iface,
1799                                                interfaces->count + 1,
1800                                                sizeof(struct hostapd_iface *));
1801                         if (!tmp) {
1802                                 hostapd_interface_deinit_free(hapd_iface);
1803                                 return -1;
1804                         }
1805                         interfaces->iface = tmp;
1806                         interfaces->iface[interfaces->count++] = hapd_iface;
1807                         new_iface = hapd_iface;
1808                 }
1809
1810                 if (new_iface) {
1811                         if (interfaces->driver_init(hapd_iface) ||
1812                             hostapd_setup_interface(hapd_iface)) {
1813                                 interfaces->count--;
1814                                 goto fail;
1815                         }
1816                 } else {
1817                         /* Assign new BSS with bss[0]'s driver info */
1818                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
1819                         hapd->driver = hapd_iface->bss[0]->driver;
1820                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
1821                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
1822                                   ETH_ALEN);
1823
1824                         if (start_ctrl_iface_bss(hapd) < 0 ||
1825                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
1826                              hostapd_setup_bss(hapd, -1))) {
1827                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
1828                                 hapd_iface->conf->num_bss--;
1829                                 hapd_iface->num_bss--;
1830                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
1831                                            __func__, hapd, hapd->conf->iface);
1832                                 os_free(hapd);
1833                                 return -1;
1834                         }
1835                 }
1836                 return 0;
1837         }
1838
1839         ptr = os_strchr(buf, ' ');
1840         if (ptr == NULL)
1841                 return -1;
1842         *ptr++ = '\0';
1843
1844         if (os_strncmp(ptr, "config=", 7) == 0)
1845                 conf_file = ptr + 7;
1846
1847         for (i = 0; i < interfaces->count; i++) {
1848                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
1849                                buf)) {
1850                         wpa_printf(MSG_INFO, "Cannot add interface - it "
1851                                    "already exists");
1852                         return -1;
1853                 }
1854         }
1855
1856         hapd_iface = hostapd_iface_alloc(interfaces);
1857         if (hapd_iface == NULL) {
1858                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1859                            "for interface", __func__);
1860                 goto fail;
1861         }
1862
1863         if (conf_file && interfaces->config_read_cb) {
1864                 conf = interfaces->config_read_cb(conf_file);
1865                 if (conf && conf->bss)
1866                         os_strlcpy(conf->bss[0]->iface, buf,
1867                                    sizeof(conf->bss[0]->iface));
1868         } else
1869                 conf = hostapd_config_alloc(interfaces, buf, ptr);
1870         if (conf == NULL || conf->bss == NULL) {
1871                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1872                            "for configuration", __func__);
1873                 goto fail;
1874         }
1875
1876         hapd_iface = hostapd_data_alloc(interfaces, conf);
1877         if (hapd_iface == NULL) {
1878                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1879                            "for hostapd", __func__);
1880                 goto fail;
1881         }
1882
1883         if (start_ctrl_iface(hapd_iface) < 0)
1884                 goto fail;
1885
1886         wpa_printf(MSG_INFO, "Add interface '%s'", conf->bss[0]->iface);
1887
1888         return 0;
1889
1890 fail:
1891         if (conf)
1892                 hostapd_config_free(conf);
1893         if (hapd_iface) {
1894                 if (hapd_iface->bss) {
1895                         for (i = 0; i < hapd_iface->num_bss; i++) {
1896                                 hapd = hapd_iface->bss[i];
1897                                 if (!hapd)
1898                                         continue;
1899                                 if (hapd_iface->interfaces &&
1900                                     hapd_iface->interfaces->ctrl_iface_deinit)
1901                                         hapd_iface->interfaces->
1902                                                 ctrl_iface_deinit(hapd);
1903                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
1904                                            __func__, hapd_iface->bss[i],
1905                                            hapd->conf->iface);
1906                                 os_free(hapd);
1907                                 hapd_iface->bss[i] = NULL;
1908                         }
1909                         os_free(hapd_iface->bss);
1910                 }
1911                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1912                            __func__, hapd_iface);
1913                 os_free(hapd_iface);
1914         }
1915         return -1;
1916 }
1917
1918
1919 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
1920 {
1921         size_t i;
1922
1923         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
1924
1925         /* Remove hostapd_data only if it has already been initialized */
1926         if (idx < iface->num_bss) {
1927                 struct hostapd_data *hapd = iface->bss[idx];
1928
1929                 hostapd_bss_deinit(hapd);
1930                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
1931                            __func__, hapd, hapd->conf->iface);
1932                 hostapd_config_free_bss(hapd->conf);
1933                 os_free(hapd);
1934
1935                 iface->num_bss--;
1936
1937                 for (i = idx; i < iface->num_bss; i++)
1938                         iface->bss[i] = iface->bss[i + 1];
1939         } else {
1940                 hostapd_config_free_bss(iface->conf->bss[idx]);
1941                 iface->conf->bss[idx] = NULL;
1942         }
1943
1944         iface->conf->num_bss--;
1945         for (i = idx; i < iface->conf->num_bss; i++)
1946                 iface->conf->bss[i] = iface->conf->bss[i + 1];
1947
1948         return 0;
1949 }
1950
1951
1952 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
1953 {
1954         struct hostapd_iface *hapd_iface;
1955         size_t i, j, k = 0;
1956
1957         for (i = 0; i < interfaces->count; i++) {
1958                 hapd_iface = interfaces->iface[i];
1959                 if (hapd_iface == NULL)
1960                         return -1;
1961                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
1962                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
1963                         hapd_iface->driver_ap_teardown =
1964                                 !!(hapd_iface->drv_flags &
1965                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
1966
1967                         hostapd_interface_deinit_free(hapd_iface);
1968                         k = i;
1969                         while (k < (interfaces->count - 1)) {
1970                                 interfaces->iface[k] =
1971                                         interfaces->iface[k + 1];
1972                                 k++;
1973                         }
1974                         interfaces->count--;
1975                         return 0;
1976                 }
1977
1978                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
1979                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
1980                                 hapd_iface->driver_ap_teardown =
1981                                         !(hapd_iface->drv_flags &
1982                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
1983                                 return hostapd_remove_bss(hapd_iface, j);
1984                         }
1985                 }
1986         }
1987         return -1;
1988 }
1989
1990
1991 /**
1992  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
1993  * @hapd: Pointer to BSS data
1994  * @sta: Pointer to the associated STA data
1995  * @reassoc: 1 to indicate this was a re-association; 0 = first association
1996  *
1997  * This function will be called whenever a station associates with the AP. It
1998  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
1999  * from drv_callbacks.c based on driver events for drivers that take care of
2000  * management frames (IEEE 802.11 authentication and association) internally.
2001  */
2002 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2003                            int reassoc)
2004 {
2005         if (hapd->tkip_countermeasures) {
2006                 hostapd_drv_sta_deauth(hapd, sta->addr,
2007                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2008                 return;
2009         }
2010
2011         hostapd_prune_associations(hapd, sta->addr);
2012
2013         /* IEEE 802.11F (IAPP) */
2014         if (hapd->conf->ieee802_11f)
2015                 iapp_new_station(hapd->iapp, sta);
2016
2017 #ifdef CONFIG_P2P
2018         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2019                 sta->no_p2p_set = 1;
2020                 hapd->num_sta_no_p2p++;
2021                 if (hapd->num_sta_no_p2p == 1)
2022                         hostapd_p2p_non_p2p_sta_connected(hapd);
2023         }
2024 #endif /* CONFIG_P2P */
2025
2026         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2027          * IEEE 802.1X/WPA code will start accounting after the station has
2028          * been authorized. */
2029         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa) {
2030                 ap_sta_set_authorized(hapd, sta, 1);
2031                 os_get_reltime(&sta->connected_time);
2032                 accounting_sta_start(hapd, sta);
2033         }
2034
2035         /* Start IEEE 802.1X authentication process for new stations */
2036         ieee802_1x_new_station(hapd, sta);
2037         if (reassoc) {
2038                 if (sta->auth_alg != WLAN_AUTH_FT &&
2039                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2040                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2041         } else
2042                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2043
2044         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2045                 wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
2046                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
2047                            __func__, MAC2STR(sta->addr),
2048                            hapd->conf->ap_max_inactivity);
2049                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2050                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2051                                        ap_handle_timer, hapd, sta);
2052         }
2053 }
2054
2055
2056 const char * hostapd_state_text(enum hostapd_iface_state s)
2057 {
2058         switch (s) {
2059         case HAPD_IFACE_UNINITIALIZED:
2060                 return "UNINITIALIZED";
2061         case HAPD_IFACE_DISABLED:
2062                 return "DISABLED";
2063         case HAPD_IFACE_COUNTRY_UPDATE:
2064                 return "COUNTRY_UPDATE";
2065         case HAPD_IFACE_ACS:
2066                 return "ACS";
2067         case HAPD_IFACE_HT_SCAN:
2068                 return "HT_SCAN";
2069         case HAPD_IFACE_DFS:
2070                 return "DFS";
2071         case HAPD_IFACE_ENABLED:
2072                 return "ENABLED";
2073         }
2074
2075         return "UNKNOWN";
2076 }
2077
2078
2079 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2080 {
2081         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2082                    iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2083                    hostapd_state_text(s));
2084         iface->state = s;
2085 }
2086
2087
2088 #ifdef NEED_AP_MLME
2089
2090 static void free_beacon_data(struct beacon_data *beacon)
2091 {
2092         os_free(beacon->head);
2093         beacon->head = NULL;
2094         os_free(beacon->tail);
2095         beacon->tail = NULL;
2096         os_free(beacon->probe_resp);
2097         beacon->probe_resp = NULL;
2098         os_free(beacon->beacon_ies);
2099         beacon->beacon_ies = NULL;
2100         os_free(beacon->proberesp_ies);
2101         beacon->proberesp_ies = NULL;
2102         os_free(beacon->assocresp_ies);
2103         beacon->assocresp_ies = NULL;
2104 }
2105
2106
2107 static int hostapd_build_beacon_data(struct hostapd_iface *iface,
2108                                      struct beacon_data *beacon)
2109 {
2110         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2111         struct wpa_driver_ap_params params;
2112         int ret;
2113         struct hostapd_data *hapd = iface->bss[0];
2114
2115         os_memset(beacon, 0, sizeof(*beacon));
2116         ret = ieee802_11_build_ap_params(hapd, &params);
2117         if (ret < 0)
2118                 return ret;
2119
2120         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2121                                          &proberesp_extra,
2122                                          &assocresp_extra);
2123         if (ret)
2124                 goto free_ap_params;
2125
2126         ret = -1;
2127         beacon->head = os_malloc(params.head_len);
2128         if (!beacon->head)
2129                 goto free_ap_extra_ies;
2130
2131         os_memcpy(beacon->head, params.head, params.head_len);
2132         beacon->head_len = params.head_len;
2133
2134         beacon->tail = os_malloc(params.tail_len);
2135         if (!beacon->tail)
2136                 goto free_beacon;
2137
2138         os_memcpy(beacon->tail, params.tail, params.tail_len);
2139         beacon->tail_len = params.tail_len;
2140
2141         if (params.proberesp != NULL) {
2142                 beacon->probe_resp = os_malloc(params.proberesp_len);
2143                 if (!beacon->probe_resp)
2144                         goto free_beacon;
2145
2146                 os_memcpy(beacon->probe_resp, params.proberesp,
2147                           params.proberesp_len);
2148                 beacon->probe_resp_len = params.proberesp_len;
2149         }
2150
2151         /* copy the extra ies */
2152         if (beacon_extra) {
2153                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2154                 if (!beacon->beacon_ies)
2155                         goto free_beacon;
2156
2157                 os_memcpy(beacon->beacon_ies,
2158                           beacon_extra->buf, wpabuf_len(beacon_extra));
2159                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2160         }
2161
2162         if (proberesp_extra) {
2163                 beacon->proberesp_ies =
2164                         os_malloc(wpabuf_len(proberesp_extra));
2165                 if (!beacon->proberesp_ies)
2166                         goto free_beacon;
2167
2168                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2169                           wpabuf_len(proberesp_extra));
2170                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2171         }
2172
2173         if (assocresp_extra) {
2174                 beacon->assocresp_ies =
2175                         os_malloc(wpabuf_len(assocresp_extra));
2176                 if (!beacon->assocresp_ies)
2177                         goto free_beacon;
2178
2179                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2180                           wpabuf_len(assocresp_extra));
2181                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2182         }
2183
2184         ret = 0;
2185 free_beacon:
2186         /* if the function fails, the caller should not free beacon data */
2187         if (ret)
2188                 free_beacon_data(beacon);
2189
2190 free_ap_extra_ies:
2191         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2192                                   assocresp_extra);
2193 free_ap_params:
2194         ieee802_11_free_ap_params(&params);
2195         return ret;
2196 }
2197
2198
2199 /*
2200  * TODO: This flow currently supports only changing frequency within the
2201  * same hw_mode. Any other changes to MAC parameters or provided settings (even
2202  * width) are not supported.
2203  */
2204 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2205                                       struct hostapd_config *conf,
2206                                       struct hostapd_freq_params *params,
2207                                       struct hostapd_freq_params *old_params)
2208 {
2209         int channel;
2210
2211         if (!params->channel) {
2212                 /* check if the new channel is supported by hw */
2213                 channel = hostapd_hw_get_channel(hapd, params->freq);
2214                 if (!channel)
2215                         return -1;
2216         } else {
2217                 channel = params->channel;
2218         }
2219
2220         /* if a pointer to old_params is provided we save previous state */
2221         if (old_params) {
2222                 old_params->channel = conf->channel;
2223                 old_params->ht_enabled = conf->ieee80211n;
2224                 old_params->sec_channel_offset = conf->secondary_channel;
2225         }
2226
2227         conf->channel = channel;
2228         conf->ieee80211n = params->ht_enabled;
2229         conf->secondary_channel = params->sec_channel_offset;
2230
2231         /* TODO: maybe call here hostapd_config_check here? */
2232
2233         return 0;
2234 }
2235
2236
2237 static int hostapd_fill_csa_settings(struct hostapd_iface *iface,
2238                                      struct csa_settings *settings)
2239 {
2240         struct hostapd_freq_params old_freq;
2241         int ret;
2242
2243         os_memset(&old_freq, 0, sizeof(old_freq));
2244         if (!iface || !iface->freq || iface->csa_in_progress)
2245                 return -1;
2246
2247         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2248                                          &settings->freq_params,
2249                                          &old_freq);
2250         if (ret)
2251                 return ret;
2252
2253         ret = hostapd_build_beacon_data(iface, &settings->beacon_after);
2254
2255         /* change back the configuration */
2256         hostapd_change_config_freq(iface->bss[0], iface->conf,
2257                                    &old_freq, NULL);
2258
2259         if (ret)
2260                 return ret;
2261
2262         /* set channel switch parameters for csa ie */
2263         iface->cs_freq_params = settings->freq_params;
2264         iface->cs_count = settings->cs_count;
2265         iface->cs_block_tx = settings->block_tx;
2266
2267         ret = hostapd_build_beacon_data(iface, &settings->beacon_csa);
2268         if (ret) {
2269                 free_beacon_data(&settings->beacon_after);
2270                 return ret;
2271         }
2272
2273         settings->counter_offset_beacon = iface->cs_c_off_beacon;
2274         settings->counter_offset_presp = iface->cs_c_off_proberesp;
2275
2276         return 0;
2277 }
2278
2279
2280 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2281 {
2282         os_memset(&hapd->iface->cs_freq_params, 0,
2283                   sizeof(hapd->iface->cs_freq_params));
2284         hapd->iface->cs_count = 0;
2285         hapd->iface->cs_block_tx = 0;
2286         hapd->iface->cs_c_off_beacon = 0;
2287         hapd->iface->cs_c_off_proberesp = 0;
2288         hapd->iface->csa_in_progress = 0;
2289 }
2290
2291
2292 int hostapd_switch_channel(struct hostapd_data *hapd,
2293                            struct csa_settings *settings)
2294 {
2295         int ret;
2296         ret = hostapd_fill_csa_settings(hapd->iface, settings);
2297         if (ret)
2298                 return ret;
2299
2300         ret = hostapd_drv_switch_channel(hapd, settings);
2301         free_beacon_data(&settings->beacon_csa);
2302         free_beacon_data(&settings->beacon_after);
2303
2304         if (ret) {
2305                 /* if we failed, clean cs parameters */
2306                 hostapd_cleanup_cs_params(hapd);
2307                 return ret;
2308         }
2309
2310         hapd->iface->csa_in_progress = 1;
2311         return 0;
2312 }
2313
2314 #endif /* NEED_AP_MLME */