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