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 #include "ieee802_11.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
  46 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  47                                int (*cb)(struct hostapd_iface *iface,
  48                                          void *ctx), void *ctx)
  49 {
  50         size_t i;
  51         int ret;
  52
  53         for (i = 0; i < interfaces->count; i++) {
  54                 ret = cb(interfaces->iface[i], ctx);
  55                 if (ret)
  56                         return ret;
  57         }
  58
  59         return 0;
  60 }
  61
  62
  63 static void hostapd_reload_bss(struct hostapd_data *hapd)
  64 {
  65         struct hostapd_ssid *ssid;
  66
  67 #ifndef CONFIG_NO_RADIUS
  68         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  69 #endif /* CONFIG_NO_RADIUS */
  70
  71         ssid = &hapd->conf->ssid;
  72         if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  73             ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  74                 /*
  75                  * Force PSK to be derived again since SSID or passphrase may
  76                  * have changed.
  77                  */
  78                 os_free(ssid->wpa_psk);
  79                 ssid->wpa_psk = NULL;
  80         }
  81         if (hostapd_setup_wpa_psk(hapd->conf)) {
  82                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  83                            "after reloading configuration");
  84         }
  85
  86         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  87                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  88         else
  89                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  90
  91         if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
  92                 hostapd_setup_wpa(hapd);
  93                 if (hapd->wpa_auth)
  94                         wpa_init_keys(hapd->wpa_auth);
  95         } else if (hapd->conf->wpa) {
  96                 const u8 *wpa_ie;
  97                 size_t wpa_ie_len;
  98                 hostapd_reconfig_wpa(hapd);
  99                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
 100                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
 101                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 102                                    "the kernel driver.");
 103         } else if (hapd->wpa_auth) {
 104                 wpa_deinit(hapd->wpa_auth);
 105                 hapd->wpa_auth = NULL;
 106                 hostapd_set_privacy(hapd, 0);
 107                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 108                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 109         }
 110
 111         ieee802_11_set_beacon(hapd);
 112         hostapd_update_wps(hapd);
 113
 114         if (hapd->conf->ssid.ssid_set &&
 115             hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
 116                              hapd->conf->ssid.ssid_len)) {
 117                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 118                 /* try to continue */
 119         }
 120         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 121 }
 122
 123
 124 static void hostapd_clear_old(struct hostapd_iface *iface)
 125 {
 126         size_t j;
 127
 128         /*
 129          * Deauthenticate all stations since the new configuration may not
 130          * allow them to use the BSS anymore.
 131          */
 132         for (j = 0; j < iface->num_bss; j++) {
 133                 hostapd_flush_old_stations(iface->bss[j],
 134                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 135                 hostapd_broadcast_wep_clear(iface->bss[j]);
 136
 137 #ifndef CONFIG_NO_RADIUS
 138                 /* TODO: update dynamic data based on changed configuration
 139                  * items (e.g., open/close sockets, etc.) */
 140                 radius_client_flush(iface->bss[j]->radius, 0);
 141 #endif /* CONFIG_NO_RADIUS */
 142         }
 143 }
 144
 145
 146 int hostapd_reload_config(struct hostapd_iface *iface)
 147 {
 148         struct hostapd_data *hapd = iface->bss[0];
 149         struct hostapd_config *newconf, *oldconf;
 150         size_t j;
 151
 152         if (iface->config_fname == NULL) {
 153                 /* Only in-memory config in use - assume it has been updated */
 154                 hostapd_clear_old(iface);
 155                 for (j = 0; j < iface->num_bss; j++)
 156                         hostapd_reload_bss(iface->bss[j]);
 157                 return 0;
 158         }
 159
 160         if (iface->interfaces == NULL ||
 161             iface->interfaces->config_read_cb == NULL)
 162                 return -1;
 163         newconf = iface->interfaces->config_read_cb(iface->config_fname);
 164         if (newconf == NULL)
 165                 return -1;
 166
 167         hostapd_clear_old(iface);
 168
 169         oldconf = hapd->iconf;
 170         iface->conf = newconf;
 171
 172         for (j = 0; j < iface->num_bss; j++) {
 173                 hapd = iface->bss[j];
 174                 hapd->iconf = newconf;
 175                 hapd->iconf->channel = oldconf->channel;
 176                 hapd->iconf->secondary_channel = oldconf->secondary_channel;
 177                 hapd->iconf->ieee80211n = oldconf->ieee80211n;
 178                 hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
 179                 hapd->iconf->ht_capab = oldconf->ht_capab;
 180                 hapd->iconf->vht_capab = oldconf->vht_capab;
 181                 hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
 182                 hapd->iconf->vht_oper_centr_freq_seg0_idx =
 183                         oldconf->vht_oper_centr_freq_seg0_idx;
 184                 hapd->iconf->vht_oper_centr_freq_seg1_idx =
 185                         oldconf->vht_oper_centr_freq_seg1_idx;
 186                 hapd->conf = newconf->bss[j];
 187                 hostapd_reload_bss(hapd);
 188         }
 189
 190         hostapd_config_free(oldconf);
 191
 192
 193         return 0;
 194 }
 195
 196
 197 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 198                                               char *ifname)
 199 {
 200         int i;
 201
 202         for (i = 0; i < NUM_WEP_KEYS; i++) {
 203                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 204                                         0, NULL, 0, NULL, 0)) {
 205                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 206                                    "encryption keys (ifname=%s keyidx=%d)",
 207                                    ifname, i);
 208                 }
 209         }
 210 #ifdef CONFIG_IEEE80211W
 211         if (hapd->conf->ieee80211w) {
 212                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 213                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 214                                                 NULL, i, 0, NULL,
 215                                                 0, NULL, 0)) {
 216                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 217                                            "default mgmt encryption keys "
 218                                            "(ifname=%s keyidx=%d)", ifname, i);
 219                         }
 220                 }
 221         }
 222 #endif /* CONFIG_IEEE80211W */
 223 }
 224
 225
 226 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 227 {
 228         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 229         return 0;
 230 }
 231
 232
 233 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 234 {
 235         int errors = 0, idx;
 236         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 237
 238         idx = ssid->wep.idx;
 239         if (ssid->wep.default_len &&
 240             hostapd_drv_set_key(hapd->conf->iface,
 241                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 242                                 1, NULL, 0, ssid->wep.key[idx],
 243                                 ssid->wep.len[idx])) {
 244                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 245                 errors++;
 246         }
 247
 248         return errors;
 249 }
 250
 251
 252 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 253 {
 254         if (!hapd->started) {
 255                 wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
 256                            __func__, hapd->conf->iface);
 257                 return;
 258         }
 259         hapd->started = 0;
 260
 261         wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
 262         iapp_deinit(hapd->iapp);
 263         hapd->iapp = NULL;
 264         accounting_deinit(hapd);
 265         hostapd_deinit_wpa(hapd);
 266         vlan_deinit(hapd);
 267         hostapd_acl_deinit(hapd);
 268 #ifndef CONFIG_NO_RADIUS
 269         radius_client_deinit(hapd->radius);
 270         hapd->radius = NULL;
 271         radius_das_deinit(hapd->radius_das);
 272         hapd->radius_das = NULL;
 273 #endif /* CONFIG_NO_RADIUS */
 274
 275         hostapd_deinit_wps(hapd);
 276
 277         authsrv_deinit(hapd);
 278
 279         if (hapd->interface_added &&
 280             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 281                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 282                            hapd->conf->iface);
 283         }
 284
 285         os_free(hapd->probereq_cb);
 286         hapd->probereq_cb = NULL;
 287
 288 #ifdef CONFIG_P2P
 289         wpabuf_free(hapd->p2p_beacon_ie);
 290         hapd->p2p_beacon_ie = NULL;
 291         wpabuf_free(hapd->p2p_probe_resp_ie);
 292         hapd->p2p_probe_resp_ie = NULL;
 293 #endif /* CONFIG_P2P */
 294
 295         wpabuf_free(hapd->time_adv);
 296
 297 #ifdef CONFIG_INTERWORKING
 298         gas_serv_deinit(hapd);
 299 #endif /* CONFIG_INTERWORKING */
 300
 301 #ifdef CONFIG_SQLITE
 302         os_free(hapd->tmp_eap_user.identity);
 303         os_free(hapd->tmp_eap_user.password);
 304 #endif /* CONFIG_SQLITE */
 305 }
 306
 307
 308 /**
 309  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 310  * @hapd: Pointer to BSS data
 311  *
 312  * This function is used to free all per-BSS data structures and resources.
 313  * Most of the modules that are initialized in hostapd_setup_bss() are
 314  * deinitialized here.
 315  */
 316 static void hostapd_cleanup(struct hostapd_data *hapd)
 317 {
 318         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
 319                    hapd->conf->iface);
 320         if (hapd->iface->interfaces &&
 321             hapd->iface->interfaces->ctrl_iface_deinit)
 322                 hapd->iface->interfaces->ctrl_iface_deinit(hapd);
 323         hostapd_free_hapd_data(hapd);
 324 }
 325
 326
 327 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 328 {
 329         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 330         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 331         iface->hw_features = NULL;
 332         os_free(iface->current_rates);
 333         iface->current_rates = NULL;
 334         os_free(iface->basic_rates);
 335         iface->basic_rates = NULL;
 336         ap_list_deinit(iface);
 337 }
 338
 339
 340 /**
 341  * hostapd_cleanup_iface - Complete per-interface cleanup
 342  * @iface: Pointer to interface data
 343  *
 344  * This function is called after per-BSS data structures are deinitialized
 345  * with hostapd_cleanup().
 346  */
 347 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 348 {
 349         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 350         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
 351
 352         hostapd_cleanup_iface_partial(iface);
 353         hostapd_config_free(iface->conf);
 354         iface->conf = NULL;
 355
 356         os_free(iface->config_fname);
 357         os_free(iface->bss);
 358         wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
 359         os_free(iface);
 360 }
 361
 362
 363 static void hostapd_clear_wep(struct hostapd_data *hapd)
 364 {
 365         if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
 366                 hostapd_set_privacy(hapd, 0);
 367                 hostapd_broadcast_wep_clear(hapd);
 368         }
 369 }
 370
 371
 372 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 373 {
 374         int i;
 375
 376         hostapd_broadcast_wep_set(hapd);
 377
 378         if (hapd->conf->ssid.wep.default_len) {
 379                 hostapd_set_privacy(hapd, 1);
 380                 return 0;
 381         }
 382
 383         /*
 384          * When IEEE 802.1X is not enabled, the driver may need to know how to
 385          * set authentication algorithms for static WEP.
 386          */
 387         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 388
 389         for (i = 0; i < 4; i++) {
 390                 if (hapd->conf->ssid.wep.key[i] &&
 391                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 392                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 393                                         hapd->conf->ssid.wep.key[i],
 394                                         hapd->conf->ssid.wep.len[i])) {
 395                         wpa_printf(MSG_WARNING, "Could not set WEP "
 396                                    "encryption.");
 397                         return -1;
 398                 }
 399                 if (hapd->conf->ssid.wep.key[i] &&
 400                     i == hapd->conf->ssid.wep.idx)
 401                         hostapd_set_privacy(hapd, 1);
 402         }
 403
 404         return 0;
 405 }
 406
 407
 408 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 409 {
 410         int ret = 0;
 411         u8 addr[ETH_ALEN];
 412
 413         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 414                 return 0;
 415
 416         if (!hapd->iface->driver_ap_teardown) {
 417                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 418                         "Flushing old station entries");
 419
 420                 if (hostapd_flush(hapd)) {
 421                         wpa_msg(hapd->msg_ctx, MSG_WARNING,
 422                                 "Could not connect to kernel driver");
 423                         ret = -1;
 424                 }
 425         }
 426         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 427         os_memset(addr, 0xff, ETH_ALEN);
 428         hostapd_drv_sta_deauth(hapd, addr, reason);
 429         hostapd_free_stas(hapd);
 430
 431         return ret;
 432 }
 433
 434
 435 /**
 436  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 437  * @iface: Pointer to interface data
 438  * Returns: 0 on success, -1 on failure
 439  *
 440  * This function is used to validate that the configured BSSIDs are valid.
 441  */
 442 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 443 {
 444         u8 mask[ETH_ALEN] = { 0 };
 445         struct hostapd_data *hapd = iface->bss[0];
 446         unsigned int i = iface->conf->num_bss, bits = 0, j;
 447         int auto_addr = 0;
 448
 449         if (hostapd_drv_none(hapd))
 450                 return 0;
 451
 452         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 453
 454         /* Determine the bits necessary to cover the number of BSSIDs. */
 455         for (i--; i; i >>= 1)
 456                 bits++;
 457
 458         /* Determine the bits necessary to any configured BSSIDs,
 459            if they are higher than the number of BSSIDs. */
 460         for (j = 0; j < iface->conf->num_bss; j++) {
 461                 if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
 462                         if (j)
 463                                 auto_addr++;
 464                         continue;
 465                 }
 466
 467                 for (i = 0; i < ETH_ALEN; i++) {
 468                         mask[i] |=
 469                                 iface->conf->bss[j]->bssid[i] ^
 470                                 hapd->own_addr[i];
 471                 }
 472         }
 473
 474         if (!auto_addr)
 475                 goto skip_mask_ext;
 476
 477         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 478                 ;
 479         j = 0;
 480         if (i < ETH_ALEN) {
 481                 j = (5 - i) * 8;
 482
 483                 while (mask[i] != 0) {
 484                         mask[i] >>= 1;
 485                         j++;
 486                 }
 487         }
 488
 489         if (bits < j)
 490                 bits = j;
 491
 492         if (bits > 40) {
 493                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 494                            bits);
 495                 return -1;
 496         }
 497
 498         os_memset(mask, 0xff, ETH_ALEN);
 499         j = bits / 8;
 500         for (i = 5; i > 5 - j; i--)
 501                 mask[i] = 0;
 502         j = bits % 8;
 503         while (j--)
 504                 mask[i] <<= 1;
 505
 506 skip_mask_ext:
 507         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 508                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 509
 510         if (!auto_addr)
 511                 return 0;
 512
 513         for (i = 0; i < ETH_ALEN; i++) {
 514                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 515                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 516                                    " for start address " MACSTR ".",
 517                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 518                         wpa_printf(MSG_ERROR, "Start address must be the "
 519                                    "first address in the block (i.e., addr "
 520                                    "AND mask == addr).");
 521                         return -1;
 522                 }
 523         }
 524
 525         return 0;
 526 }
 527
 528
 529 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 530 {
 531         size_t i;
 532
 533         for (i = 0; i < conf->num_bss; i++) {
 534                 if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
 535                         return 1;
 536                 }
 537         }
 538
 539         return 0;
 540 }
 541
 542
 543 #ifndef CONFIG_NO_RADIUS
 544
 545 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 546                                     struct radius_das_attrs *attr)
 547 {
 548         if (attr->nas_identifier &&
 549             (!hapd->conf->nas_identifier ||
 550              os_strlen(hapd->conf->nas_identifier) !=
 551              attr->nas_identifier_len ||
 552              os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
 553                        attr->nas_identifier_len) != 0)) {
 554                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
 555                 return 1;
 556         }
 557
 558         if (attr->nas_ip_addr &&
 559             (hapd->conf->own_ip_addr.af != AF_INET ||
 560              os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
 561              0)) {
 562                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
 563                 return 1;
 564         }
 565
 566 #ifdef CONFIG_IPV6
 567         if (attr->nas_ipv6_addr &&
 568             (hapd->conf->own_ip_addr.af != AF_INET6 ||
 569              os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
 570              != 0)) {
 571                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
 572                 return 1;
 573         }
 574 #endif /* CONFIG_IPV6 */
 575
 576         return 0;
 577 }
 578
 579
 580 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 581                                               struct radius_das_attrs *attr)
 582 {
 583         struct sta_info *sta = NULL;
 584         char buf[128];
 585
 586         if (attr->sta_addr)
 587                 sta = ap_get_sta(hapd, attr->sta_addr);
 588
 589         if (sta == NULL && attr->acct_session_id &&
 590             attr->acct_session_id_len == 17) {
 591                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 592                         os_snprintf(buf, sizeof(buf), "%08X-%08X",
 593                                     sta->acct_session_id_hi,
 594                                     sta->acct_session_id_lo);
 595                         if (os_memcmp(attr->acct_session_id, buf, 17) == 0)
 596                                 break;
 597                 }
 598         }
 599
 600         if (sta == NULL && attr->cui) {
 601                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 602                         struct wpabuf *cui;
 603                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 604                         if (cui && wpabuf_len(cui) == attr->cui_len &&
 605                             os_memcmp(wpabuf_head(cui), attr->cui,
 606                                       attr->cui_len) == 0)
 607                                 break;
 608                 }
 609         }
 610
 611         if (sta == NULL && attr->user_name) {
 612                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 613                         u8 *identity;
 614                         size_t identity_len;
 615                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 616                                                            &identity_len);
 617                         if (identity &&
 618                             identity_len == attr->user_name_len &&
 619                             os_memcmp(identity, attr->user_name, identity_len)
 620                             == 0)
 621                                 break;
 622                 }
 623         }
 624
 625         return sta;
 626 }
 627
 628
 629 static enum radius_das_res
 630 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 631 {
 632         struct hostapd_data *hapd = ctx;
 633         struct sta_info *sta;
 634
 635         if (hostapd_das_nas_mismatch(hapd, attr))
 636                 return RADIUS_DAS_NAS_MISMATCH;
 637
 638         sta = hostapd_das_find_sta(hapd, attr);
 639         if (sta == NULL)
 640                 return RADIUS_DAS_SESSION_NOT_FOUND;
 641
 642         wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
 643
 644         hostapd_drv_sta_deauth(hapd, sta->addr,
 645                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 646         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 647
 648         return RADIUS_DAS_SUCCESS;
 649 }
 650
 651 #endif /* CONFIG_NO_RADIUS */
 652
 653
 654 /**
 655  * hostapd_setup_bss - Per-BSS setup (initialization)
 656  * @hapd: Pointer to BSS data
 657  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
 658  *      but interface may exist
 659  *
 660  * This function is used to initialize all per-BSS data structures and
 661  * resources. This gets called in a loop for each BSS when an interface is
 662  * initialized. Most of the modules that are initialized here will be
 663  * deinitialized in hostapd_cleanup().
 664  */
 665 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 666 {
 667         struct hostapd_bss_config *conf = hapd->conf;
 668         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 669         int ssid_len, set_ssid;
 670         char force_ifname[IFNAMSIZ];
 671         u8 if_addr[ETH_ALEN];
 672
 673         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 674                    __func__, hapd, hapd->conf->iface, first);
 675
 676         if (hapd->started) {
 677                 wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
 678                            __func__, hapd->conf->iface);
 679                 return -1;
 680         }
 681         hapd->started = 1;
 682
 683         if (!first || first == -1) {
 684                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 685                         /* Allocate the next available BSSID. */
 686                         do {
 687                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 688                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 689                 } else {
 690                         /* Allocate the configured BSSID. */
 691                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 692
 693                         if (hostapd_mac_comp(hapd->own_addr,
 694                                              hapd->iface->bss[0]->own_addr) ==
 695                             0) {
 696                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 697                                            "BSSID set to the MAC address of "
 698                                            "the radio", hapd->conf->iface);
 699                                 return -1;
 700                         }
 701                 }
 702
 703                 hapd->interface_added = 1;
 704                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 705                                    hapd->conf->iface, hapd->own_addr, hapd,
 706                                    &hapd->drv_priv, force_ifname, if_addr,
 707                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 708                                    NULL, first == -1)) {
 709                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 710                                    MACSTR ")", MAC2STR(hapd->own_addr));
 711                         hapd->interface_added = 0;
 712                         return -1;
 713                 }
 714         }
 715
 716         if (conf->wmm_enabled < 0)
 717                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 718
 719         hostapd_flush_old_stations(hapd, WLAN_REASON_PREV_AUTH_NOT_VALID);
 720         hostapd_set_privacy(hapd, 0);
 721
 722         hostapd_broadcast_wep_clear(hapd);
 723         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 724                 return -1;
 725
 726         /*
 727          * Fetch the SSID from the system and use it or,
 728          * if one was specified in the config file, verify they
 729          * match.
 730          */
 731         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 732         if (ssid_len < 0) {
 733                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 734                 return -1;
 735         }
 736         if (conf->ssid.ssid_set) {
 737                 /*
 738                  * If SSID is specified in the config file and it differs
 739                  * from what is being used then force installation of the
 740                  * new SSID.
 741                  */
 742                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 743                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 744         } else {
 745                 /*
 746                  * No SSID in the config file; just use the one we got
 747                  * from the system.
 748                  */
 749                 set_ssid = 0;
 750                 conf->ssid.ssid_len = ssid_len;
 751                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 752         }
 753
 754         if (!hostapd_drv_none(hapd)) {
 755                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 756                            " and ssid \"%s\"",
 757                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 758                            wpa_ssid_txt(hapd->conf->ssid.ssid,
 759                                         hapd->conf->ssid.ssid_len));
 760         }
 761
 762         if (hostapd_setup_wpa_psk(conf)) {
 763                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 764                 return -1;
 765         }
 766
 767         /* Set SSID for the kernel driver (to be used in beacon and probe
 768          * response frames) */
 769         if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
 770                                          conf->ssid.ssid_len)) {
 771                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 772                 return -1;
 773         }
 774
 775         if (wpa_debug_level <= MSG_MSGDUMP)
 776                 conf->radius->msg_dumps = 1;
 777 #ifndef CONFIG_NO_RADIUS
 778         hapd->radius = radius_client_init(hapd, conf->radius);
 779         if (hapd->radius == NULL) {
 780                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 781                 return -1;
 782         }
 783
 784         if (hapd->conf->radius_das_port) {
 785                 struct radius_das_conf das_conf;
 786                 os_memset(&das_conf, 0, sizeof(das_conf));
 787                 das_conf.port = hapd->conf->radius_das_port;
 788                 das_conf.shared_secret = hapd->conf->radius_das_shared_secret;
 789                 das_conf.shared_secret_len =
 790                         hapd->conf->radius_das_shared_secret_len;
 791                 das_conf.client_addr = &hapd->conf->radius_das_client_addr;
 792                 das_conf.time_window = hapd->conf->radius_das_time_window;
 793                 das_conf.require_event_timestamp =
 794                         hapd->conf->radius_das_require_event_timestamp;
 795                 das_conf.ctx = hapd;
 796                 das_conf.disconnect = hostapd_das_disconnect;
 797                 hapd->radius_das = radius_das_init(&das_conf);
 798                 if (hapd->radius_das == NULL) {
 799                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
 800                                    "failed.");
 801                         return -1;
 802                 }
 803         }
 804 #endif /* CONFIG_NO_RADIUS */
 805
 806         if (hostapd_acl_init(hapd)) {
 807                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 808                 return -1;
 809         }
 810         if (hostapd_init_wps(hapd, conf))
 811                 return -1;
 812
 813         if (authsrv_init(hapd) < 0)
 814                 return -1;
 815
 816         if (ieee802_1x_init(hapd)) {
 817                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 818                 return -1;
 819         }
 820
 821         if ((hapd->conf->wpa || hapd->conf->osen) && hostapd_setup_wpa(hapd))
 822                 return -1;
 823
 824         if (accounting_init(hapd)) {
 825                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 826                 return -1;
 827         }
 828
 829         if (hapd->conf->ieee802_11f &&
 830             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 831                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 832                            "failed.");
 833                 return -1;
 834         }
 835
 836 #ifdef CONFIG_INTERWORKING
 837         if (gas_serv_init(hapd)) {
 838                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
 839                 return -1;
 840         }
 841
 842         if (conf->qos_map_set_len &&
 843             hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
 844                                     conf->qos_map_set_len)) {
 845                 wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
 846                 return -1;
 847         }
 848 #endif /* CONFIG_INTERWORKING */
 849
 850         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 851                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 852                 return -1;
 853         }
 854
 855         if (!hapd->conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
 856                 return -1;
 857
 858         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 859                 return -1;
 860
 861         if (hapd->driver && hapd->driver->set_operstate)
 862                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 863
 864         return 0;
 865 }
 866
 867
 868 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 869 {
 870         struct hostapd_data *hapd = iface->bss[0];
 871         int i;
 872         struct hostapd_tx_queue_params *p;
 873
 874         for (i = 0; i < NUM_TX_QUEUES; i++) {
 875                 p = &iface->conf->tx_queue[i];
 876
 877                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 878                                                 p->cwmax, p->burst)) {
 879                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 880                                    "parameters for queue %d.", i);
 881                         /* Continue anyway */
 882                 }
 883         }
 884 }
 885
 886
 887 static int hostapd_set_acl_list(struct hostapd_data *hapd,
 888                                 struct mac_acl_entry *mac_acl,
 889                                 int n_entries, u8 accept_acl)
 890 {
 891         struct hostapd_acl_params *acl_params;
 892         int i, err;
 893
 894         acl_params = os_zalloc(sizeof(*acl_params) +
 895                                (n_entries * sizeof(acl_params->mac_acl[0])));
 896         if (!acl_params)
 897                 return -ENOMEM;
 898
 899         for (i = 0; i < n_entries; i++)
 900                 os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
 901                           ETH_ALEN);
 902
 903         acl_params->acl_policy = accept_acl;
 904         acl_params->num_mac_acl = n_entries;
 905
 906         err = hostapd_drv_set_acl(hapd, acl_params);
 907
 908         os_free(acl_params);
 909
 910         return err;
 911 }
 912
 913
 914 static void hostapd_set_acl(struct hostapd_data *hapd)
 915 {
 916         struct hostapd_config *conf = hapd->iconf;
 917         int err;
 918         u8 accept_acl;
 919
 920         if (hapd->iface->drv_max_acl_mac_addrs == 0)
 921                 return;
 922         if (!(conf->bss[0]->num_accept_mac || conf->bss[0]->num_deny_mac))
 923                 return;
 924
 925         if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
 926                 if (conf->bss[0]->num_accept_mac) {
 927                         accept_acl = 1;
 928                         err = hostapd_set_acl_list(hapd,
 929                                                    conf->bss[0]->accept_mac,
 930                                                    conf->bss[0]->num_accept_mac,
 931                                                    accept_acl);
 932                         if (err) {
 933                                 wpa_printf(MSG_DEBUG, "Failed to set accept acl");
 934                                 return;
 935                         }
 936                 } else {
 937                         wpa_printf(MSG_DEBUG, "Mismatch between ACL Policy & Accept/deny lists file");
 938                 }
 939         } else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
 940                 if (conf->bss[0]->num_deny_mac) {
 941                         accept_acl = 0;
 942                         err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
 943                                                    conf->bss[0]->num_deny_mac,
 944                                                    accept_acl);
 945                         if (err) {
 946                                 wpa_printf(MSG_DEBUG, "Failed to set deny acl");
 947                                 return;
 948                         }
 949                 } else {
 950                         wpa_printf(MSG_DEBUG, "Mismatch between ACL Policy & Accept/deny lists file");
 951                 }
 952         }
 953 }
 954
 955
 956 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
 957 {
 958         if (!hapd->iface->interfaces ||
 959             !hapd->iface->interfaces->ctrl_iface_init)
 960                 return 0;
 961
 962         if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
 963                 wpa_printf(MSG_ERROR,
 964                            "Failed to setup control interface for %s",
 965                            hapd->conf->iface);
 966                 return -1;
 967         }
 968
 969         return 0;
 970 }
 971
 972
 973 static int start_ctrl_iface(struct hostapd_iface *iface)
 974 {
 975         size_t i;
 976
 977         if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
 978                 return 0;
 979
 980         for (i = 0; i < iface->num_bss; i++) {
 981                 struct hostapd_data *hapd = iface->bss[i];
 982                 if (iface->interfaces->ctrl_iface_init(hapd)) {
 983                         wpa_printf(MSG_ERROR,
 984                                    "Failed to setup control interface for %s",
 985                                    hapd->conf->iface);
 986                         return -1;
 987                 }
 988         }
 989
 990         return 0;
 991 }
 992
 993
 994 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
 995 {
 996         struct hostapd_iface *iface = eloop_ctx;
 997
 998         if (!iface->wait_channel_update) {
 999                 wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
1000                 return;
1001         }
1002
1003         /*
1004          * It is possible that the existing channel list is acceptable, so try
1005          * to proceed.
1006          */
1007         wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
1008         setup_interface2(iface);
1009 }
1010
1011
1012 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1013 {
1014         if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1015                 return;
1016
1017         wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1018         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1019         setup_interface2(iface);
1020 }
1021
1022
1023 static int setup_interface(struct hostapd_iface *iface)
1024 {
1025         struct hostapd_data *hapd = iface->bss[0];
1026         size_t i;
1027
1028         /*
1029          * It is possible that setup_interface() is called after the interface
1030          * was disabled etc., in which case driver_ap_teardown is possibly set
1031          * to 1. Clear it here so any other key/station deletion, which is not
1032          * part of a teardown flow, would also call the relevant driver
1033          * callbacks.
1034          */
1035         iface->driver_ap_teardown = 0;
1036
1037         if (!iface->phy[0]) {
1038                 const char *phy = hostapd_drv_get_radio_name(hapd);
1039                 if (phy) {
1040                         wpa_printf(MSG_DEBUG, "phy: %s", phy);
1041                         os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1042                 }
1043         }
1044
1045         /*
1046          * Make sure that all BSSes get configured with a pointer to the same
1047          * driver interface.
1048          */
1049         for (i = 1; i < iface->num_bss; i++) {
1050                 iface->bss[i]->driver = hapd->driver;
1051                 iface->bss[i]->drv_priv = hapd->drv_priv;
1052         }
1053
1054         if (hostapd_validate_bssid_configuration(iface))
1055                 return -1;
1056
1057         /*
1058          * Initialize control interfaces early to allow external monitoring of
1059          * channel setup operations that may take considerable amount of time
1060          * especially for DFS cases.
1061          */
1062         if (start_ctrl_iface(iface))
1063                 return -1;
1064
1065         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1066                 char country[4], previous_country[4];
1067
1068                 hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1069                 if (hostapd_get_country(hapd, previous_country) < 0)
1070                         previous_country[0] = '\0';
1071
1072                 os_memcpy(country, hapd->iconf->country, 3);
1073                 country[3] = '\0';
1074                 if (hostapd_set_country(hapd, country) < 0) {
1075                         wpa_printf(MSG_ERROR, "Failed to set country code");
1076                         return -1;
1077                 }
1078
1079                 wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1080                            previous_country, country);
1081
1082                 if (os_strncmp(previous_country, country, 2) != 0) {
1083                         wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1084                         iface->wait_channel_update = 1;
1085                         eloop_register_timeout(5, 0,
1086                                                channel_list_update_timeout,
1087                                                iface, NULL);
1088                         return 0;
1089                 }
1090         }
1091
1092         return setup_interface2(iface);
1093 }
1094
1095
1096 static int setup_interface2(struct hostapd_iface *iface)
1097 {
1098         iface->wait_channel_update = 0;
1099
1100         if (hostapd_get_hw_features(iface)) {
1101                 /* Not all drivers support this yet, so continue without hw
1102                  * feature data. */
1103         } else {
1104                 int ret = hostapd_select_hw_mode(iface);
1105                 if (ret < 0) {
1106                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1107                                    "channel. (%d)", ret);
1108                         goto fail;
1109                 }
1110                 if (ret == 1) {
1111                         wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1112                         return 0;
1113                 }
1114                 ret = hostapd_check_ht_capab(iface);
1115                 if (ret < 0)
1116                         goto fail;
1117                 if (ret == 1) {
1118                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1119                                    "be completed in a callback");
1120                         return 0;
1121                 }
1122
1123                 if (iface->conf->ieee80211h)
1124                         wpa_printf(MSG_DEBUG, "DFS support is enabled");
1125         }
1126         return hostapd_setup_interface_complete(iface, 0);
1127
1128 fail:
1129         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1130         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1131         if (iface->interfaces && iface->interfaces->terminate_on_error)
1132                 eloop_terminate();
1133         return -1;
1134 }
1135
1136
1137 /**
1138  * hostapd_setup_interface_complete - Complete interface setup
1139  *
1140  * This function is called when previous steps in the interface setup has been
1141  * completed. This can also start operations, e.g., DFS, that will require
1142  * additional processing before interface is ready to be enabled. Such
1143  * operations will call this function from eloop callbacks when finished.
1144  */
1145 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1146 {
1147         struct hostapd_data *hapd = iface->bss[0];
1148         size_t j;
1149         u8 *prev_addr;
1150
1151         if (err)
1152                 goto fail;
1153
1154         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1155         if (iface->conf->channel) {
1156 #ifdef NEED_AP_MLME
1157                 int res;
1158 #endif /* NEED_AP_MLME */
1159
1160                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1161                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1162                            "Frequency: %d MHz",
1163                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1164                            iface->conf->channel, iface->freq);
1165
1166 #ifdef NEED_AP_MLME
1167                 /* Check DFS */
1168                 res = hostapd_handle_dfs(iface);
1169                 if (res <= 0) {
1170                         if (res < 0)
1171                                 goto fail;
1172                         return res;
1173                 }
1174 #endif /* NEED_AP_MLME */
1175
1176                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1177                                      hapd->iconf->channel,
1178                                      hapd->iconf->ieee80211n,
1179                                      hapd->iconf->ieee80211ac,
1180                                      hapd->iconf->secondary_channel,
1181                                      hapd->iconf->vht_oper_chwidth,
1182                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1183                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1184                         wpa_printf(MSG_ERROR, "Could not set channel for "
1185                                    "kernel driver");
1186                         goto fail;
1187                 }
1188         }
1189
1190         if (iface->current_mode) {
1191                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1192                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1193                                    "table.");
1194                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1195                                        HOSTAPD_LEVEL_WARNING,
1196                                        "Failed to prepare rates table.");
1197                         goto fail;
1198                 }
1199         }
1200
1201         if (hapd->iconf->rts_threshold > -1 &&
1202             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1203                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1204                            "kernel driver");
1205                 goto fail;
1206         }
1207
1208         if (hapd->iconf->fragm_threshold > -1 &&
1209             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1210                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1211                            "for kernel driver");
1212                 goto fail;
1213         }
1214
1215         prev_addr = hapd->own_addr;
1216
1217         for (j = 0; j < iface->num_bss; j++) {
1218                 hapd = iface->bss[j];
1219                 if (j)
1220                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1221                 if (hostapd_setup_bss(hapd, j == 0))
1222                         goto fail;
1223                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1224                         prev_addr = hapd->own_addr;
1225         }
1226         hapd = iface->bss[0];
1227
1228         hostapd_tx_queue_params(iface);
1229
1230         ap_list_init(iface);
1231
1232         hostapd_set_acl(hapd);
1233
1234         if (hostapd_driver_commit(hapd) < 0) {
1235                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1236                            "configuration", __func__);
1237                 goto fail;
1238         }
1239
1240         /*
1241          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1242          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1243          * mode), the interface is up only after driver_commit, so initialize
1244          * WPS after driver_commit.
1245          */
1246         for (j = 0; j < iface->num_bss; j++) {
1247                 if (hostapd_init_wps_complete(iface->bss[j]))
1248                         goto fail;
1249         }
1250
1251         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1252         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1253         if (hapd->setup_complete_cb)
1254                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1255
1256         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1257                    iface->bss[0]->conf->iface);
1258         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1259                 iface->interfaces->terminate_on_error--;
1260
1261         return 0;
1262
1263 fail:
1264         wpa_printf(MSG_ERROR, "Interface initialization failed");
1265         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1266         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1267         if (iface->interfaces && iface->interfaces->terminate_on_error)
1268                 eloop_terminate();
1269         return -1;
1270 }
1271
1272
1273 /**
1274  * hostapd_setup_interface - Setup of an interface
1275  * @iface: Pointer to interface data.
1276  * Returns: 0 on success, -1 on failure
1277  *
1278  * Initializes the driver interface, validates the configuration,
1279  * and sets driver parameters based on the configuration.
1280  * Flushes old stations, sets the channel, encryption,
1281  * beacons, and WDS links based on the configuration.
1282  *
1283  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1284  * or DFS operations, this function returns 0 before such operations have been
1285  * completed. The pending operations are registered into eloop and will be
1286  * completed from eloop callbacks. Those callbacks end up calling
1287  * hostapd_setup_interface_complete() once setup has been completed.
1288  */
1289 int hostapd_setup_interface(struct hostapd_iface *iface)
1290 {
1291         int ret;
1292
1293         ret = setup_interface(iface);
1294         if (ret) {
1295                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1296                            iface->bss[0]->conf->iface);
1297                 return -1;
1298         }
1299
1300         return 0;
1301 }
1302
1303
1304 /**
1305  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1306  * @hapd_iface: Pointer to interface data
1307  * @conf: Pointer to per-interface configuration
1308  * @bss: Pointer to per-BSS configuration for this BSS
1309  * Returns: Pointer to allocated BSS data
1310  *
1311  * This function is used to allocate per-BSS data structure. This data will be
1312  * freed after hostapd_cleanup() is called for it during interface
1313  * deinitialization.
1314  */
1315 struct hostapd_data *
1316 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1317                        struct hostapd_config *conf,
1318                        struct hostapd_bss_config *bss)
1319 {
1320         struct hostapd_data *hapd;
1321
1322         hapd = os_zalloc(sizeof(*hapd));
1323         if (hapd == NULL)
1324                 return NULL;
1325
1326         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1327         hapd->iconf = conf;
1328         hapd->conf = bss;
1329         hapd->iface = hapd_iface;
1330         hapd->driver = hapd->iconf->driver;
1331         hapd->ctrl_sock = -1;
1332
1333         return hapd;
1334 }
1335
1336
1337 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1338 {
1339         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1340                    hapd->conf->iface);
1341         hostapd_free_stas(hapd);
1342         hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
1343         hostapd_clear_wep(hapd);
1344         hostapd_cleanup(hapd);
1345 }
1346
1347
1348 void hostapd_interface_deinit(struct hostapd_iface *iface)
1349 {
1350         int j;
1351
1352         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1353         if (iface == NULL)
1354                 return;
1355
1356 #ifdef CONFIG_IEEE80211N
1357 #ifdef NEED_AP_MLME
1358         hostapd_stop_setup_timers(iface);
1359         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
1360 #endif /* NEED_AP_MLME */
1361 #endif /* CONFIG_IEEE80211N */
1362         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1363         iface->wait_channel_update = 0;
1364
1365         for (j = iface->num_bss - 1; j >= 0; j--)
1366                 hostapd_bss_deinit(iface->bss[j]);
1367 }
1368
1369
1370 void hostapd_interface_free(struct hostapd_iface *iface)
1371 {
1372         size_t j;
1373         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1374         for (j = 0; j < iface->num_bss; j++) {
1375                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1376                            __func__, iface->bss[j]);
1377                 os_free(iface->bss[j]);
1378         }
1379         hostapd_cleanup_iface(iface);
1380 }
1381
1382
1383 /**
1384  * hostapd_init - Allocate and initialize per-interface data
1385  * @config_file: Path to the configuration file
1386  * Returns: Pointer to the allocated interface data or %NULL on failure
1387  *
1388  * This function is used to allocate main data structures for per-interface
1389  * data. The allocated data buffer will be freed by calling
1390  * hostapd_cleanup_iface().
1391  */
1392 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1393                                     const char *config_file)
1394 {
1395         struct hostapd_iface *hapd_iface = NULL;
1396         struct hostapd_config *conf = NULL;
1397         struct hostapd_data *hapd;
1398         size_t i;
1399
1400         hapd_iface = os_zalloc(sizeof(*hapd_iface));
1401         if (hapd_iface == NULL)
1402                 goto fail;
1403
1404         hapd_iface->config_fname = os_strdup(config_file);
1405         if (hapd_iface->config_fname == NULL)
1406                 goto fail;
1407
1408         conf = interfaces->config_read_cb(hapd_iface->config_fname);
1409         if (conf == NULL)
1410                 goto fail;
1411         hapd_iface->conf = conf;
1412
1413         hapd_iface->num_bss = conf->num_bss;
1414         hapd_iface->bss = os_calloc(conf->num_bss,
1415                                     sizeof(struct hostapd_data *));
1416         if (hapd_iface->bss == NULL)
1417                 goto fail;
1418
1419         for (i = 0; i < conf->num_bss; i++) {
1420                 hapd = hapd_iface->bss[i] =
1421                         hostapd_alloc_bss_data(hapd_iface, conf,
1422                                                conf->bss[i]);
1423                 if (hapd == NULL)
1424                         goto fail;
1425                 hapd->msg_ctx = hapd;
1426         }
1427
1428         return hapd_iface;
1429
1430 fail:
1431         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1432                    config_file);
1433         if (conf)
1434                 hostapd_config_free(conf);
1435         if (hapd_iface) {
1436                 os_free(hapd_iface->config_fname);
1437                 os_free(hapd_iface->bss);
1438                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1439                            __func__, hapd_iface);
1440                 os_free(hapd_iface);
1441         }
1442         return NULL;
1443 }
1444
1445
1446 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1447 {
1448         size_t i, j;
1449
1450         for (i = 0; i < interfaces->count; i++) {
1451                 struct hostapd_iface *iface = interfaces->iface[i];
1452                 for (j = 0; j < iface->num_bss; j++) {
1453                         struct hostapd_data *hapd = iface->bss[j];
1454                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
1455                                 return 1;
1456                 }
1457         }
1458
1459         return 0;
1460 }
1461
1462
1463 /**
1464  * hostapd_interface_init_bss - Read configuration file and init BSS data
1465  *
1466  * This function is used to parse configuration file for a BSS. This BSS is
1467  * added to an existing interface sharing the same radio (if any) or a new
1468  * interface is created if this is the first interface on a radio. This
1469  * allocate memory for the BSS. No actual driver operations are started.
1470  *
1471  * This is similar to hostapd_interface_init(), but for a case where the
1472  * configuration is used to add a single BSS instead of all BSSes for a radio.
1473  */
1474 struct hostapd_iface *
1475 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
1476                            const char *config_fname, int debug)
1477 {
1478         struct hostapd_iface *new_iface = NULL, *iface = NULL;
1479         struct hostapd_data *hapd;
1480         int k;
1481         size_t i, bss_idx;
1482
1483         if (!phy || !*phy)
1484                 return NULL;
1485
1486         for (i = 0; i < interfaces->count; i++) {
1487                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
1488                         iface = interfaces->iface[i];
1489                         break;
1490                 }
1491         }
1492
1493         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
1494                    config_fname, phy, iface ? "" : " --> new PHY");
1495         if (iface) {
1496                 struct hostapd_config *conf;
1497                 struct hostapd_bss_config **tmp_conf;
1498                 struct hostapd_data **tmp_bss;
1499                 struct hostapd_bss_config *bss;
1500                 const char *ifname;
1501
1502                 /* Add new BSS to existing iface */
1503                 conf = interfaces->config_read_cb(config_fname);
1504                 if (conf == NULL)
1505                         return NULL;
1506                 if (conf->num_bss > 1) {
1507                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
1508                         hostapd_config_free(conf);
1509                         return NULL;
1510                 }
1511
1512                 ifname = conf->bss[0]->iface;
1513                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
1514                         wpa_printf(MSG_ERROR,
1515                                    "Interface name %s already in use", ifname);
1516                         hostapd_config_free(conf);
1517                         return NULL;
1518                 }
1519
1520                 tmp_conf = os_realloc_array(
1521                         iface->conf->bss, iface->conf->num_bss + 1,
1522                         sizeof(struct hostapd_bss_config *));
1523                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
1524                                            sizeof(struct hostapd_data *));
1525                 if (tmp_bss)
1526                         iface->bss = tmp_bss;
1527                 if (tmp_conf) {
1528                         iface->conf->bss = tmp_conf;
1529                         iface->conf->last_bss = tmp_conf[0];
1530                 }
1531                 if (tmp_bss == NULL || tmp_conf == NULL) {
1532                         hostapd_config_free(conf);
1533                         return NULL;
1534                 }
1535                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
1536                 iface->conf->num_bss++;
1537
1538                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
1539                 if (hapd == NULL) {
1540                         iface->conf->num_bss--;
1541                         hostapd_config_free(conf);
1542                         return NULL;
1543                 }
1544                 iface->conf->last_bss = bss;
1545                 iface->bss[iface->num_bss] = hapd;
1546                 hapd->msg_ctx = hapd;
1547
1548                 bss_idx = iface->num_bss++;
1549                 conf->num_bss--;
1550                 conf->bss[0] = NULL;
1551                 hostapd_config_free(conf);
1552         } else {
1553                 /* Add a new iface with the first BSS */
1554                 new_iface = iface = hostapd_init(interfaces, config_fname);
1555                 if (!iface)
1556                         return NULL;
1557                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1558                 iface->interfaces = interfaces;
1559                 bss_idx = 0;
1560         }
1561
1562         for (k = 0; k < debug; k++) {
1563                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
1564                         iface->bss[bss_idx]->conf->logger_stdout_level--;
1565         }
1566
1567         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
1568             !hostapd_drv_none(iface->bss[bss_idx])) {
1569                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
1570                            config_fname);
1571                 if (new_iface)
1572                         hostapd_interface_deinit_free(new_iface);
1573                 return NULL;
1574         }
1575
1576         return iface;
1577 }
1578
1579
1580 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
1581 {
1582         const struct wpa_driver_ops *driver;
1583         void *drv_priv;
1584
1585         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1586         if (iface == NULL)
1587                 return;
1588         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
1589                    __func__, (unsigned int) iface->num_bss,
1590                    (unsigned int) iface->conf->num_bss);
1591         driver = iface->bss[0]->driver;
1592         drv_priv = iface->bss[0]->drv_priv;
1593         hostapd_interface_deinit(iface);
1594         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1595                    __func__, driver, drv_priv);
1596         if (driver && driver->hapd_deinit && drv_priv)
1597                 driver->hapd_deinit(drv_priv);
1598         hostapd_interface_free(iface);
1599 }
1600
1601
1602 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
1603                                   void *drv_priv,
1604                                   struct hostapd_iface *hapd_iface)
1605 {
1606         size_t j;
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                 for (j = 0; j < hapd_iface->num_bss; j++) {
1613                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
1614                                    __func__, (int) j,
1615                                    hapd_iface->bss[j]->drv_priv);
1616                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
1617                                 hapd_iface->bss[j]->drv_priv = NULL;
1618                 }
1619         }
1620 }
1621
1622
1623 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
1624 {
1625         if (hapd_iface->bss[0]->drv_priv != NULL) {
1626                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
1627                            hapd_iface->conf->bss[0]->iface);
1628                 return -1;
1629         }
1630
1631         wpa_printf(MSG_DEBUG, "Enable interface %s",
1632                    hapd_iface->conf->bss[0]->iface);
1633
1634         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1635                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
1636                 return -1;
1637         }
1638
1639         if (hapd_iface->interfaces == NULL ||
1640             hapd_iface->interfaces->driver_init == NULL ||
1641             hapd_iface->interfaces->driver_init(hapd_iface))
1642                 return -1;
1643
1644         if (hostapd_setup_interface(hapd_iface)) {
1645                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
1646                                       hapd_iface->bss[0]->drv_priv,
1647                                       hapd_iface);
1648                 return -1;
1649         }
1650
1651         return 0;
1652 }
1653
1654
1655 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
1656 {
1657         size_t j;
1658
1659         wpa_printf(MSG_DEBUG, "Reload interface %s",
1660                    hapd_iface->conf->bss[0]->iface);
1661         for (j = 0; j < hapd_iface->num_bss; j++)
1662                 hostapd_set_security_params(hapd_iface->conf->bss[j]);
1663         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1664                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
1665                 return -1;
1666         }
1667         hostapd_clear_old(hapd_iface);
1668         for (j = 0; j < hapd_iface->num_bss; j++)
1669                 hostapd_reload_bss(hapd_iface->bss[j]);
1670
1671         return 0;
1672 }
1673
1674
1675 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
1676 {
1677         size_t j;
1678         const struct wpa_driver_ops *driver;
1679         void *drv_priv;
1680
1681         if (hapd_iface == NULL)
1682                 return -1;
1683         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1684         driver = hapd_iface->bss[0]->driver;
1685         drv_priv = hapd_iface->bss[0]->drv_priv;
1686
1687         hapd_iface->driver_ap_teardown =
1688                 !!(hapd_iface->drv_flags &
1689                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
1690
1691         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
1692         for (j = 0; j < hapd_iface->num_bss; j++) {
1693                 struct hostapd_data *hapd = hapd_iface->bss[j];
1694                 hostapd_free_stas(hapd);
1695                 hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
1696                 hostapd_clear_wep(hapd);
1697                 hostapd_free_hapd_data(hapd);
1698         }
1699
1700         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
1701
1702         /* From hostapd_cleanup_iface: These were initialized in
1703          * hostapd_setup_interface and hostapd_setup_interface_complete
1704          */
1705         hostapd_cleanup_iface_partial(hapd_iface);
1706
1707         wpa_printf(MSG_DEBUG, "Interface %s disabled",
1708                    hapd_iface->bss[0]->conf->iface);
1709         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
1710         return 0;
1711 }
1712
1713
1714 static struct hostapd_iface *
1715 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
1716 {
1717         struct hostapd_iface **iface, *hapd_iface;
1718
1719         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
1720                                  sizeof(struct hostapd_iface *));
1721         if (iface == NULL)
1722                 return NULL;
1723         interfaces->iface = iface;
1724         hapd_iface = interfaces->iface[interfaces->count] =
1725                 os_zalloc(sizeof(*hapd_iface));
1726         if (hapd_iface == NULL) {
1727                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
1728                            "the interface", __func__);
1729                 return NULL;
1730         }
1731         interfaces->count++;
1732         hapd_iface->interfaces = interfaces;
1733
1734         return hapd_iface;
1735 }
1736
1737
1738 static struct hostapd_config *
1739 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
1740                      const char *ctrl_iface)
1741 {
1742         struct hostapd_bss_config *bss;
1743         struct hostapd_config *conf;
1744
1745         /* Allocates memory for bss and conf */
1746         conf = hostapd_config_defaults();
1747         if (conf == NULL) {
1748                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
1749                                 "configuration", __func__);
1750                 return NULL;
1751         }
1752
1753         conf->driver = wpa_drivers[0];
1754         if (conf->driver == NULL) {
1755                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
1756                 hostapd_config_free(conf);
1757                 return NULL;
1758         }
1759
1760         bss = conf->last_bss = conf->bss[0];
1761
1762         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
1763         bss->ctrl_interface = os_strdup(ctrl_iface);
1764         if (bss->ctrl_interface == NULL) {
1765                 hostapd_config_free(conf);
1766                 return NULL;
1767         }
1768
1769         /* Reading configuration file skipped, will be done in SET!
1770          * From reading the configuration till the end has to be done in
1771          * SET
1772          */
1773         return conf;
1774 }
1775
1776
1777 static struct hostapd_iface * hostapd_data_alloc(
1778         struct hapd_interfaces *interfaces, struct hostapd_config *conf)
1779 {
1780         size_t i;
1781         struct hostapd_iface *hapd_iface =
1782                 interfaces->iface[interfaces->count - 1];
1783         struct hostapd_data *hapd;
1784
1785         hapd_iface->conf = conf;
1786         hapd_iface->num_bss = conf->num_bss;
1787
1788         hapd_iface->bss = os_zalloc(conf->num_bss *
1789                                     sizeof(struct hostapd_data *));
1790         if (hapd_iface->bss == NULL)
1791                 return NULL;
1792
1793         for (i = 0; i < conf->num_bss; i++) {
1794                 hapd = hapd_iface->bss[i] =
1795                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
1796                 if (hapd == NULL)
1797                         return NULL;
1798                 hapd->msg_ctx = hapd;
1799         }
1800
1801         hapd_iface->interfaces = interfaces;
1802
1803         return hapd_iface;
1804 }
1805
1806
1807 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
1808 {
1809         struct hostapd_config *conf = NULL;
1810         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
1811         struct hostapd_data *hapd;
1812         char *ptr;
1813         size_t i, j;
1814         const char *conf_file = NULL, *phy_name = NULL;
1815
1816         if (os_strncmp(buf, "bss_config=", 11) == 0) {
1817                 char *pos;
1818                 phy_name = buf + 11;
1819                 pos = os_strchr(phy_name, ':');
1820                 if (!pos)
1821                         return -1;
1822                 *pos++ = '\0';
1823                 conf_file = pos;
1824                 if (!os_strlen(conf_file))
1825                         return -1;
1826
1827                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
1828                                                         conf_file, 0);
1829                 if (!hapd_iface)
1830                         return -1;
1831                 for (j = 0; j < interfaces->count; j++) {
1832                         if (interfaces->iface[j] == hapd_iface)
1833                                 break;
1834                 }
1835                 if (j == interfaces->count) {
1836                         struct hostapd_iface **tmp;
1837                         tmp = os_realloc_array(interfaces->iface,
1838                                                interfaces->count + 1,
1839                                                sizeof(struct hostapd_iface *));
1840                         if (!tmp) {
1841                                 hostapd_interface_deinit_free(hapd_iface);
1842                                 return -1;
1843                         }
1844                         interfaces->iface = tmp;
1845                         interfaces->iface[interfaces->count++] = hapd_iface;
1846                         new_iface = hapd_iface;
1847                 }
1848
1849                 if (new_iface) {
1850                         if (interfaces->driver_init(hapd_iface) ||
1851                             hostapd_setup_interface(hapd_iface)) {
1852                                 interfaces->count--;
1853                                 goto fail;
1854                         }
1855                 } else {
1856                         /* Assign new BSS with bss[0]'s driver info */
1857                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
1858                         hapd->driver = hapd_iface->bss[0]->driver;
1859                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
1860                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
1861                                   ETH_ALEN);
1862
1863                         if (start_ctrl_iface_bss(hapd) < 0 ||
1864                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
1865                              hostapd_setup_bss(hapd, -1))) {
1866                                 hostapd_cleanup(hapd);
1867                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
1868                                 hapd_iface->conf->num_bss--;
1869                                 hapd_iface->num_bss--;
1870                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
1871                                            __func__, hapd, hapd->conf->iface);
1872                                 os_free(hapd);
1873                                 return -1;
1874                         }
1875                 }
1876                 return 0;
1877         }
1878
1879         ptr = os_strchr(buf, ' ');
1880         if (ptr == NULL)
1881                 return -1;
1882         *ptr++ = '\0';
1883
1884         if (os_strncmp(ptr, "config=", 7) == 0)
1885                 conf_file = ptr + 7;
1886
1887         for (i = 0; i < interfaces->count; i++) {
1888                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
1889                                buf)) {
1890                         wpa_printf(MSG_INFO, "Cannot add interface - it "
1891                                    "already exists");
1892                         return -1;
1893                 }
1894         }
1895
1896         hapd_iface = hostapd_iface_alloc(interfaces);
1897         if (hapd_iface == NULL) {
1898                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1899                            "for interface", __func__);
1900                 goto fail;
1901         }
1902
1903         if (conf_file && interfaces->config_read_cb) {
1904                 conf = interfaces->config_read_cb(conf_file);
1905                 if (conf && conf->bss)
1906                         os_strlcpy(conf->bss[0]->iface, buf,
1907                                    sizeof(conf->bss[0]->iface));
1908         } else
1909                 conf = hostapd_config_alloc(interfaces, buf, ptr);
1910         if (conf == NULL || conf->bss == NULL) {
1911                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1912                            "for configuration", __func__);
1913                 goto fail;
1914         }
1915
1916         hapd_iface = hostapd_data_alloc(interfaces, conf);
1917         if (hapd_iface == NULL) {
1918                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1919                            "for hostapd", __func__);
1920                 goto fail;
1921         }
1922
1923         if (start_ctrl_iface(hapd_iface) < 0)
1924                 goto fail;
1925
1926         wpa_printf(MSG_INFO, "Add interface '%s'", conf->bss[0]->iface);
1927
1928         return 0;
1929
1930 fail:
1931         if (conf)
1932                 hostapd_config_free(conf);
1933         if (hapd_iface) {
1934                 if (hapd_iface->bss) {
1935                         for (i = 0; i < hapd_iface->num_bss; i++) {
1936                                 hapd = hapd_iface->bss[i];
1937                                 if (!hapd)
1938                                         continue;
1939                                 if (hapd_iface->interfaces &&
1940                                     hapd_iface->interfaces->ctrl_iface_deinit)
1941                                         hapd_iface->interfaces->
1942                                                 ctrl_iface_deinit(hapd);
1943                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
1944                                            __func__, hapd_iface->bss[i],
1945                                            hapd->conf->iface);
1946                                 os_free(hapd);
1947                                 hapd_iface->bss[i] = NULL;
1948                         }
1949                         os_free(hapd_iface->bss);
1950                 }
1951                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1952                            __func__, hapd_iface);
1953                 os_free(hapd_iface);
1954         }
1955         return -1;
1956 }
1957
1958
1959 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
1960 {
1961         size_t i;
1962
1963         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
1964
1965         /* Remove hostapd_data only if it has already been initialized */
1966         if (idx < iface->num_bss) {
1967                 struct hostapd_data *hapd = iface->bss[idx];
1968
1969                 hostapd_bss_deinit(hapd);
1970                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
1971                            __func__, hapd, hapd->conf->iface);
1972                 hostapd_config_free_bss(hapd->conf);
1973                 os_free(hapd);
1974
1975                 iface->num_bss--;
1976
1977                 for (i = idx; i < iface->num_bss; i++)
1978                         iface->bss[i] = iface->bss[i + 1];
1979         } else {
1980                 hostapd_config_free_bss(iface->conf->bss[idx]);
1981                 iface->conf->bss[idx] = NULL;
1982         }
1983
1984         iface->conf->num_bss--;
1985         for (i = idx; i < iface->conf->num_bss; i++)
1986                 iface->conf->bss[i] = iface->conf->bss[i + 1];
1987
1988         return 0;
1989 }
1990
1991
1992 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
1993 {
1994         struct hostapd_iface *hapd_iface;
1995         size_t i, j, k = 0;
1996
1997         for (i = 0; i < interfaces->count; i++) {
1998                 hapd_iface = interfaces->iface[i];
1999                 if (hapd_iface == NULL)
2000                         return -1;
2001                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2002                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2003                         hapd_iface->driver_ap_teardown =
2004                                 !!(hapd_iface->drv_flags &
2005                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2006
2007                         hostapd_interface_deinit_free(hapd_iface);
2008                         k = i;
2009                         while (k < (interfaces->count - 1)) {
2010                                 interfaces->iface[k] =
2011                                         interfaces->iface[k + 1];
2012                                 k++;
2013                         }
2014                         interfaces->count--;
2015                         return 0;
2016                 }
2017
2018                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2019                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2020                                 hapd_iface->driver_ap_teardown =
2021                                         !(hapd_iface->drv_flags &
2022                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2023                                 return hostapd_remove_bss(hapd_iface, j);
2024                         }
2025                 }
2026         }
2027         return -1;
2028 }
2029
2030
2031 /**
2032  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2033  * @hapd: Pointer to BSS data
2034  * @sta: Pointer to the associated STA data
2035  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2036  *
2037  * This function will be called whenever a station associates with the AP. It
2038  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2039  * from drv_callbacks.c based on driver events for drivers that take care of
2040  * management frames (IEEE 802.11 authentication and association) internally.
2041  */
2042 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2043                            int reassoc)
2044 {
2045         if (hapd->tkip_countermeasures) {
2046                 hostapd_drv_sta_deauth(hapd, sta->addr,
2047                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2048                 return;
2049         }
2050
2051         hostapd_prune_associations(hapd, sta->addr);
2052
2053         /* IEEE 802.11F (IAPP) */
2054         if (hapd->conf->ieee802_11f)
2055                 iapp_new_station(hapd->iapp, sta);
2056
2057 #ifdef CONFIG_P2P
2058         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2059                 sta->no_p2p_set = 1;
2060                 hapd->num_sta_no_p2p++;
2061                 if (hapd->num_sta_no_p2p == 1)
2062                         hostapd_p2p_non_p2p_sta_connected(hapd);
2063         }
2064 #endif /* CONFIG_P2P */
2065
2066         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2067          * IEEE 802.1X/WPA code will start accounting after the station has
2068          * been authorized. */
2069         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2070                 ap_sta_set_authorized(hapd, sta, 1);
2071                 os_get_reltime(&sta->connected_time);
2072                 accounting_sta_start(hapd, sta);
2073         }
2074
2075         /* Start IEEE 802.1X authentication process for new stations */
2076         ieee802_1x_new_station(hapd, sta);
2077         if (reassoc) {
2078                 if (sta->auth_alg != WLAN_AUTH_FT &&
2079                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2080                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2081         } else
2082                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2083
2084         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2085                 wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
2086                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
2087                            __func__, MAC2STR(sta->addr),
2088                            hapd->conf->ap_max_inactivity);
2089                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2090                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2091                                        ap_handle_timer, hapd, sta);
2092         }
2093 }
2094
2095
2096 const char * hostapd_state_text(enum hostapd_iface_state s)
2097 {
2098         switch (s) {
2099         case HAPD_IFACE_UNINITIALIZED:
2100                 return "UNINITIALIZED";
2101         case HAPD_IFACE_DISABLED:
2102                 return "DISABLED";
2103         case HAPD_IFACE_COUNTRY_UPDATE:
2104                 return "COUNTRY_UPDATE";
2105         case HAPD_IFACE_ACS:
2106                 return "ACS";
2107         case HAPD_IFACE_HT_SCAN:
2108                 return "HT_SCAN";
2109         case HAPD_IFACE_DFS:
2110                 return "DFS";
2111         case HAPD_IFACE_ENABLED:
2112                 return "ENABLED";
2113         }
2114
2115         return "UNKNOWN";
2116 }
2117
2118
2119 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2120 {
2121         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2122                    iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2123                    hostapd_state_text(s));
2124         iface->state = s;
2125 }
2126
2127
2128 #ifdef NEED_AP_MLME
2129
2130 static void free_beacon_data(struct beacon_data *beacon)
2131 {
2132         os_free(beacon->head);
2133         beacon->head = NULL;
2134         os_free(beacon->tail);
2135         beacon->tail = NULL;
2136         os_free(beacon->probe_resp);
2137         beacon->probe_resp = NULL;
2138         os_free(beacon->beacon_ies);
2139         beacon->beacon_ies = NULL;
2140         os_free(beacon->proberesp_ies);
2141         beacon->proberesp_ies = NULL;
2142         os_free(beacon->assocresp_ies);
2143         beacon->assocresp_ies = NULL;
2144 }
2145
2146
2147 static int hostapd_build_beacon_data(struct hostapd_iface *iface,
2148                                      struct beacon_data *beacon)
2149 {
2150         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2151         struct wpa_driver_ap_params params;
2152         int ret;
2153         struct hostapd_data *hapd = iface->bss[0];
2154
2155         os_memset(beacon, 0, sizeof(*beacon));
2156         ret = ieee802_11_build_ap_params(hapd, &params);
2157         if (ret < 0)
2158                 return ret;
2159
2160         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2161                                          &proberesp_extra,
2162                                          &assocresp_extra);
2163         if (ret)
2164                 goto free_ap_params;
2165
2166         ret = -1;
2167         beacon->head = os_malloc(params.head_len);
2168         if (!beacon->head)
2169                 goto free_ap_extra_ies;
2170
2171         os_memcpy(beacon->head, params.head, params.head_len);
2172         beacon->head_len = params.head_len;
2173
2174         beacon->tail = os_malloc(params.tail_len);
2175         if (!beacon->tail)
2176                 goto free_beacon;
2177
2178         os_memcpy(beacon->tail, params.tail, params.tail_len);
2179         beacon->tail_len = params.tail_len;
2180
2181         if (params.proberesp != NULL) {
2182                 beacon->probe_resp = os_malloc(params.proberesp_len);
2183                 if (!beacon->probe_resp)
2184                         goto free_beacon;
2185
2186                 os_memcpy(beacon->probe_resp, params.proberesp,
2187                           params.proberesp_len);
2188                 beacon->probe_resp_len = params.proberesp_len;
2189         }
2190
2191         /* copy the extra ies */
2192         if (beacon_extra) {
2193                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2194                 if (!beacon->beacon_ies)
2195                         goto free_beacon;
2196
2197                 os_memcpy(beacon->beacon_ies,
2198                           beacon_extra->buf, wpabuf_len(beacon_extra));
2199                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2200         }
2201
2202         if (proberesp_extra) {
2203                 beacon->proberesp_ies =
2204                         os_malloc(wpabuf_len(proberesp_extra));
2205                 if (!beacon->proberesp_ies)
2206                         goto free_beacon;
2207
2208                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2209                           wpabuf_len(proberesp_extra));
2210                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2211         }
2212
2213         if (assocresp_extra) {
2214                 beacon->assocresp_ies =
2215                         os_malloc(wpabuf_len(assocresp_extra));
2216                 if (!beacon->assocresp_ies)
2217                         goto free_beacon;
2218
2219                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2220                           wpabuf_len(assocresp_extra));
2221                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2222         }
2223
2224         ret = 0;
2225 free_beacon:
2226         /* if the function fails, the caller should not free beacon data */
2227         if (ret)
2228                 free_beacon_data(beacon);
2229
2230 free_ap_extra_ies:
2231         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2232                                   assocresp_extra);
2233 free_ap_params:
2234         ieee802_11_free_ap_params(&params);
2235         return ret;
2236 }
2237
2238
2239 /*
2240  * TODO: This flow currently supports only changing frequency within the
2241  * same hw_mode. Any other changes to MAC parameters or provided settings (even
2242  * width) are not supported.
2243  */
2244 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2245                                       struct hostapd_config *conf,
2246                                       struct hostapd_freq_params *params,
2247                                       struct hostapd_freq_params *old_params)
2248 {
2249         int channel;
2250
2251         if (!params->channel) {
2252                 /* check if the new channel is supported by hw */
2253                 channel = hostapd_hw_get_channel(hapd, params->freq);
2254                 if (!channel)
2255                         return -1;
2256         } else {
2257                 channel = params->channel;
2258         }
2259
2260         /* if a pointer to old_params is provided we save previous state */
2261         if (old_params) {
2262                 old_params->channel = conf->channel;
2263                 old_params->ht_enabled = conf->ieee80211n;
2264                 old_params->sec_channel_offset = conf->secondary_channel;
2265         }
2266
2267         conf->channel = channel;
2268         conf->ieee80211n = params->ht_enabled;
2269         conf->secondary_channel = params->sec_channel_offset;
2270
2271         /* TODO: maybe call here hostapd_config_check here? */
2272
2273         return 0;
2274 }
2275
2276
2277 static int hostapd_fill_csa_settings(struct hostapd_iface *iface,
2278                                      struct csa_settings *settings)
2279 {
2280         struct hostapd_freq_params old_freq;
2281         int ret;
2282
2283         os_memset(&old_freq, 0, sizeof(old_freq));
2284         if (!iface || !iface->freq || iface->csa_in_progress)
2285                 return -1;
2286
2287         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2288                                          &settings->freq_params,
2289                                          &old_freq);
2290         if (ret)
2291                 return ret;
2292
2293         ret = hostapd_build_beacon_data(iface, &settings->beacon_after);
2294
2295         /* change back the configuration */
2296         hostapd_change_config_freq(iface->bss[0], iface->conf,
2297                                    &old_freq, NULL);
2298
2299         if (ret)
2300                 return ret;
2301
2302         /* set channel switch parameters for csa ie */
2303         iface->cs_freq_params = settings->freq_params;
2304         iface->cs_count = settings->cs_count;
2305         iface->cs_block_tx = settings->block_tx;
2306
2307         ret = hostapd_build_beacon_data(iface, &settings->beacon_csa);
2308         if (ret) {
2309                 free_beacon_data(&settings->beacon_after);
2310                 return ret;
2311         }
2312
2313         settings->counter_offset_beacon = iface->cs_c_off_beacon;
2314         settings->counter_offset_presp = iface->cs_c_off_proberesp;
2315
2316         return 0;
2317 }
2318
2319
2320 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2321 {
2322         os_memset(&hapd->iface->cs_freq_params, 0,
2323                   sizeof(hapd->iface->cs_freq_params));
2324         hapd->iface->cs_count = 0;
2325         hapd->iface->cs_block_tx = 0;
2326         hapd->iface->cs_c_off_beacon = 0;
2327         hapd->iface->cs_c_off_proberesp = 0;
2328         hapd->iface->csa_in_progress = 0;
2329 }
2330
2331
2332 int hostapd_switch_channel(struct hostapd_data *hapd,
2333                            struct csa_settings *settings)
2334 {
2335         int ret;
2336         ret = hostapd_fill_csa_settings(hapd->iface, settings);
2337         if (ret)
2338                 return ret;
2339
2340         ret = hostapd_drv_switch_channel(hapd, settings);
2341         free_beacon_data(&settings->beacon_csa);
2342         free_beacon_data(&settings->beacon_after);
2343
2344         if (ret) {
2345                 /* if we failed, clean cs parameters */
2346                 hostapd_cleanup_cs_params(hapd);
2347                 return ret;
2348         }
2349
2350         hapd->iface->csa_in_progress = 1;
2351         return 0;
2352 }
2353
2354 #endif /* NEED_AP_MLME */