src/ap/hostapd.c

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