src/ap/hostapd.c

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