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 "common/hw_features_common.h"
  16 #include "radius/radius_client.h"
  17 #include "radius/radius_das.h"
  18 #include "eap_server/tncs.h"
  19 #include "eapol_auth/eapol_auth_sm.h"
  20 #include "eapol_auth/eapol_auth_sm_i.h"
  21 #include "fst/fst.h"
  22 #include "hostapd.h"
  23 #include "authsrv.h"
  24 #include "sta_info.h"
  25 #include "accounting.h"
  26 #include "ap_list.h"
  27 #include "beacon.h"
  28 #include "iapp.h"
  29 #include "ieee802_1x.h"
  30 #include "ieee802_11_auth.h"
  31 #include "vlan_init.h"
  32 #include "wpa_auth.h"
  33 #include "wps_hostapd.h"
  34 #include "hw_features.h"
  35 #include "wpa_auth_glue.h"
  36 #include "ap_drv_ops.h"
  37 #include "ap_config.h"
  38 #include "p2p_hostapd.h"
  39 #include "gas_serv.h"
  40 #include "dfs.h"
  41 #include "ieee802_11.h"
  42 #include "bss_load.h"
  43 #include "x_snoop.h"
  44 #include "dhcp_snoop.h"
  45 #include "ndisc_snoop.h"
  46 #include "neighbor_db.h"
  47 #include "rrm.h"
  48
  49
  50 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  51 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  52 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  53 static int setup_interface2(struct hostapd_iface *iface);
  54 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
  55
  56
  57 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  58                                int (*cb)(struct hostapd_iface *iface,
  59                                          void *ctx), void *ctx)
  60 {
  61         size_t i;
  62         int ret;
  63
  64         for (i = 0; i < interfaces->count; i++) {
  65                 ret = cb(interfaces->iface[i], ctx);
  66                 if (ret)
  67                         return ret;
  68         }
  69
  70         return 0;
  71 }
  72
  73
  74 static void hostapd_reload_bss(struct hostapd_data *hapd)
  75 {
  76         struct hostapd_ssid *ssid;
  77
  78 #ifndef CONFIG_NO_RADIUS
  79         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  80 #endif /* CONFIG_NO_RADIUS */
  81
  82         ssid = &hapd->conf->ssid;
  83         if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  84             ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  85                 /*
  86                  * Force PSK to be derived again since SSID or passphrase may
  87                  * have changed.
  88                  */
  89                 hostapd_config_clear_wpa_psk(&hapd->conf->ssid.wpa_psk);
  90         }
  91         if (hostapd_setup_wpa_psk(hapd->conf)) {
  92                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  93                            "after reloading configuration");
  94         }
  95
  96         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  97                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  98         else
  99                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
 100
 101         if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
 102                 hostapd_setup_wpa(hapd);
 103                 if (hapd->wpa_auth)
 104                         wpa_init_keys(hapd->wpa_auth);
 105         } else if (hapd->conf->wpa) {
 106                 const u8 *wpa_ie;
 107                 size_t wpa_ie_len;
 108                 hostapd_reconfig_wpa(hapd);
 109                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
 110                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
 111                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 112                                    "the kernel driver.");
 113         } else if (hapd->wpa_auth) {
 114                 wpa_deinit(hapd->wpa_auth);
 115                 hapd->wpa_auth = NULL;
 116                 hostapd_set_privacy(hapd, 0);
 117                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 118                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 119         }
 120
 121         ieee802_11_set_beacon(hapd);
 122         hostapd_update_wps(hapd);
 123
 124         if (hapd->conf->ssid.ssid_set &&
 125             hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
 126                              hapd->conf->ssid.ssid_len)) {
 127                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 128                 /* try to continue */
 129         }
 130         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 131 }
 132
 133
 134 static void hostapd_clear_old(struct hostapd_iface *iface)
 135 {
 136         size_t j;
 137
 138         /*
 139          * Deauthenticate all stations since the new configuration may not
 140          * allow them to use the BSS anymore.
 141          */
 142         for (j = 0; j < iface->num_bss; j++) {
 143                 hostapd_flush_old_stations(iface->bss[j],
 144                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 145                 hostapd_broadcast_wep_clear(iface->bss[j]);
 146
 147 #ifndef CONFIG_NO_RADIUS
 148                 /* TODO: update dynamic data based on changed configuration
 149                  * items (e.g., open/close sockets, etc.) */
 150                 radius_client_flush(iface->bss[j]->radius, 0);
 151 #endif /* CONFIG_NO_RADIUS */
 152         }
 153 }
 154
 155
 156 int hostapd_reload_config(struct hostapd_iface *iface)
 157 {
 158         struct hostapd_data *hapd = iface->bss[0];
 159         struct hostapd_config *newconf, *oldconf;
 160         size_t j;
 161
 162         if (iface->config_fname == NULL) {
 163                 /* Only in-memory config in use - assume it has been updated */
 164                 hostapd_clear_old(iface);
 165                 for (j = 0; j < iface->num_bss; j++)
 166                         hostapd_reload_bss(iface->bss[j]);
 167                 return 0;
 168         }
 169
 170         if (iface->interfaces == NULL ||
 171             iface->interfaces->config_read_cb == NULL)
 172                 return -1;
 173         newconf = iface->interfaces->config_read_cb(iface->config_fname);
 174         if (newconf == NULL)
 175                 return -1;
 176
 177         hostapd_clear_old(iface);
 178
 179         oldconf = hapd->iconf;
 180         iface->conf = newconf;
 181
 182         for (j = 0; j < iface->num_bss; j++) {
 183                 hapd = iface->bss[j];
 184                 hapd->iconf = newconf;
 185                 hapd->iconf->channel = oldconf->channel;
 186                 hapd->iconf->acs = oldconf->acs;
 187                 hapd->iconf->secondary_channel = oldconf->secondary_channel;
 188                 hapd->iconf->ieee80211n = oldconf->ieee80211n;
 189                 hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
 190                 hapd->iconf->ht_capab = oldconf->ht_capab;
 191                 hapd->iconf->vht_capab = oldconf->vht_capab;
 192                 hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
 193                 hapd->iconf->vht_oper_centr_freq_seg0_idx =
 194                         oldconf->vht_oper_centr_freq_seg0_idx;
 195                 hapd->iconf->vht_oper_centr_freq_seg1_idx =
 196                         oldconf->vht_oper_centr_freq_seg1_idx;
 197                 hapd->conf = newconf->bss[j];
 198                 hostapd_reload_bss(hapd);
 199         }
 200
 201         hostapd_config_free(oldconf);
 202
 203
 204         return 0;
 205 }
 206
 207
 208 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 209                                               const char *ifname)
 210 {
 211         int i;
 212
 213         if (!ifname)
 214                 return;
 215         for (i = 0; i < NUM_WEP_KEYS; i++) {
 216                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 217                                         0, NULL, 0, NULL, 0)) {
 218                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 219                                    "encryption keys (ifname=%s keyidx=%d)",
 220                                    ifname, i);
 221                 }
 222         }
 223 #ifdef CONFIG_IEEE80211W
 224         if (hapd->conf->ieee80211w) {
 225                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 226                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 227                                                 NULL, i, 0, NULL,
 228                                                 0, NULL, 0)) {
 229                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 230                                            "default mgmt encryption keys "
 231                                            "(ifname=%s keyidx=%d)", ifname, i);
 232                         }
 233                 }
 234         }
 235 #endif /* CONFIG_IEEE80211W */
 236 }
 237
 238
 239 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 240 {
 241         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 242         return 0;
 243 }
 244
 245
 246 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 247 {
 248         int errors = 0, idx;
 249         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 250
 251         idx = ssid->wep.idx;
 252         if (ssid->wep.default_len &&
 253             hostapd_drv_set_key(hapd->conf->iface,
 254                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 255                                 1, NULL, 0, ssid->wep.key[idx],
 256                                 ssid->wep.len[idx])) {
 257                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 258                 errors++;
 259         }
 260
 261         return errors;
 262 }
 263
 264
 265 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 266 {
 267         os_free(hapd->probereq_cb);
 268         hapd->probereq_cb = NULL;
 269         hapd->num_probereq_cb = 0;
 270
 271 #ifdef CONFIG_P2P
 272         wpabuf_free(hapd->p2p_beacon_ie);
 273         hapd->p2p_beacon_ie = NULL;
 274         wpabuf_free(hapd->p2p_probe_resp_ie);
 275         hapd->p2p_probe_resp_ie = NULL;
 276 #endif /* CONFIG_P2P */
 277
 278         if (!hapd->started) {
 279                 wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
 280                            __func__, hapd->conf->iface);
 281                 return;
 282         }
 283         hapd->started = 0;
 284
 285         wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
 286         iapp_deinit(hapd->iapp);
 287         hapd->iapp = NULL;
 288         accounting_deinit(hapd);
 289         hostapd_deinit_wpa(hapd);
 290         vlan_deinit(hapd);
 291         hostapd_acl_deinit(hapd);
 292 #ifndef CONFIG_NO_RADIUS
 293         radius_client_deinit(hapd->radius);
 294         hapd->radius = NULL;
 295         radius_das_deinit(hapd->radius_das);
 296         hapd->radius_das = NULL;
 297 #endif /* CONFIG_NO_RADIUS */
 298
 299         hostapd_deinit_wps(hapd);
 300
 301         authsrv_deinit(hapd);
 302
 303         if (hapd->interface_added) {
 304                 hapd->interface_added = 0;
 305                 if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 306                         wpa_printf(MSG_WARNING,
 307                                    "Failed to remove BSS interface %s",
 308                                    hapd->conf->iface);
 309                         hapd->interface_added = 1;
 310                 } else {
 311                         /*
 312                          * Since this was a dynamically added interface, the
 313                          * driver wrapper may have removed its internal instance
 314                          * and hapd->drv_priv is not valid anymore.
 315                          */
 316                         hapd->drv_priv = NULL;
 317                 }
 318         }
 319
 320         wpabuf_free(hapd->time_adv);
 321
 322 #ifdef CONFIG_INTERWORKING
 323         gas_serv_deinit(hapd);
 324 #endif /* CONFIG_INTERWORKING */
 325
 326         bss_load_update_deinit(hapd);
 327         ndisc_snoop_deinit(hapd);
 328         dhcp_snoop_deinit(hapd);
 329         x_snoop_deinit(hapd);
 330
 331 #ifdef CONFIG_SQLITE
 332         bin_clear_free(hapd->tmp_eap_user.identity,
 333                        hapd->tmp_eap_user.identity_len);
 334         bin_clear_free(hapd->tmp_eap_user.password,
 335                        hapd->tmp_eap_user.password_len);
 336 #endif /* CONFIG_SQLITE */
 337
 338 #ifdef CONFIG_MESH
 339         wpabuf_free(hapd->mesh_pending_auth);
 340         hapd->mesh_pending_auth = NULL;
 341 #endif /* CONFIG_MESH */
 342
 343         hostapd_clean_rrm(hapd);
 344 }
 345
 346
 347 /**
 348  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 349  * @hapd: Pointer to BSS data
 350  *
 351  * This function is used to free all per-BSS data structures and resources.
 352  * Most of the modules that are initialized in hostapd_setup_bss() are
 353  * deinitialized here.
 354  */
 355 static void hostapd_cleanup(struct hostapd_data *hapd)
 356 {
 357         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
 358                    hapd->conf->iface);
 359         if (hapd->iface->interfaces &&
 360             hapd->iface->interfaces->ctrl_iface_deinit)
 361                 hapd->iface->interfaces->ctrl_iface_deinit(hapd);
 362         hostapd_free_hapd_data(hapd);
 363 }
 364
 365
 366 static void sta_track_deinit(struct hostapd_iface *iface)
 367 {
 368         struct hostapd_sta_info *info;
 369
 370         if (!iface->num_sta_seen)
 371                 return;
 372
 373         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 374                                      list))) {
 375                 dl_list_del(&info->list);
 376                 iface->num_sta_seen--;
 377                 os_free(info);
 378         }
 379 }
 380
 381
 382 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 383 {
 384         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 385 #ifdef CONFIG_IEEE80211N
 386 #ifdef NEED_AP_MLME
 387         hostapd_stop_setup_timers(iface);
 388 #endif /* NEED_AP_MLME */
 389 #endif /* CONFIG_IEEE80211N */
 390         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 391         iface->hw_features = NULL;
 392         os_free(iface->current_rates);
 393         iface->current_rates = NULL;
 394         os_free(iface->basic_rates);
 395         iface->basic_rates = NULL;
 396         ap_list_deinit(iface);
 397         sta_track_deinit(iface);
 398 }
 399
 400
 401 /**
 402  * hostapd_cleanup_iface - Complete per-interface cleanup
 403  * @iface: Pointer to interface data
 404  *
 405  * This function is called after per-BSS data structures are deinitialized
 406  * with hostapd_cleanup().
 407  */
 408 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 409 {
 410         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 411         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
 412
 413         hostapd_cleanup_iface_partial(iface);
 414         hostapd_config_free(iface->conf);
 415         iface->conf = NULL;
 416
 417         os_free(iface->config_fname);
 418         os_free(iface->bss);
 419         wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
 420         os_free(iface);
 421 }
 422
 423
 424 static void hostapd_clear_wep(struct hostapd_data *hapd)
 425 {
 426         if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
 427                 hostapd_set_privacy(hapd, 0);
 428                 hostapd_broadcast_wep_clear(hapd);
 429         }
 430 }
 431
 432
 433 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 434 {
 435         int i;
 436
 437         hostapd_broadcast_wep_set(hapd);
 438
 439         if (hapd->conf->ssid.wep.default_len) {
 440                 hostapd_set_privacy(hapd, 1);
 441                 return 0;
 442         }
 443
 444         /*
 445          * When IEEE 802.1X is not enabled, the driver may need to know how to
 446          * set authentication algorithms for static WEP.
 447          */
 448         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 449
 450         for (i = 0; i < 4; i++) {
 451                 if (hapd->conf->ssid.wep.key[i] &&
 452                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 453                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 454                                         hapd->conf->ssid.wep.key[i],
 455                                         hapd->conf->ssid.wep.len[i])) {
 456                         wpa_printf(MSG_WARNING, "Could not set WEP "
 457                                    "encryption.");
 458                         return -1;
 459                 }
 460                 if (hapd->conf->ssid.wep.key[i] &&
 461                     i == hapd->conf->ssid.wep.idx)
 462                         hostapd_set_privacy(hapd, 1);
 463         }
 464
 465         return 0;
 466 }
 467
 468
 469 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 470 {
 471         int ret = 0;
 472         u8 addr[ETH_ALEN];
 473
 474         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 475                 return 0;
 476
 477         if (!hapd->iface->driver_ap_teardown) {
 478                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 479                         "Flushing old station entries");
 480
 481                 if (hostapd_flush(hapd)) {
 482                         wpa_msg(hapd->msg_ctx, MSG_WARNING,
 483                                 "Could not connect to kernel driver");
 484                         ret = -1;
 485                 }
 486         }
 487         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 488         os_memset(addr, 0xff, ETH_ALEN);
 489         hostapd_drv_sta_deauth(hapd, addr, reason);
 490         hostapd_free_stas(hapd);
 491
 492         return ret;
 493 }
 494
 495
 496 static void hostapd_bss_deinit_no_free(struct hostapd_data *hapd)
 497 {
 498         hostapd_free_stas(hapd);
 499         hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
 500         hostapd_clear_wep(hapd);
 501 }
 502
 503
 504 /**
 505  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 506  * @iface: Pointer to interface data
 507  * Returns: 0 on success, -1 on failure
 508  *
 509  * This function is used to validate that the configured BSSIDs are valid.
 510  */
 511 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 512 {
 513         u8 mask[ETH_ALEN] = { 0 };
 514         struct hostapd_data *hapd = iface->bss[0];
 515         unsigned int i = iface->conf->num_bss, bits = 0, j;
 516         int auto_addr = 0;
 517
 518         if (hostapd_drv_none(hapd))
 519                 return 0;
 520
 521         if (iface->conf->use_driver_iface_addr)
 522                 return 0;
 523
 524         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 525
 526         /* Determine the bits necessary to cover the number of BSSIDs. */
 527         for (i--; i; i >>= 1)
 528                 bits++;
 529
 530         /* Determine the bits necessary to any configured BSSIDs,
 531            if they are higher than the number of BSSIDs. */
 532         for (j = 0; j < iface->conf->num_bss; j++) {
 533                 if (is_zero_ether_addr(iface->conf->bss[j]->bssid)) {
 534                         if (j)
 535                                 auto_addr++;
 536                         continue;
 537                 }
 538
 539                 for (i = 0; i < ETH_ALEN; i++) {
 540                         mask[i] |=
 541                                 iface->conf->bss[j]->bssid[i] ^
 542                                 hapd->own_addr[i];
 543                 }
 544         }
 545
 546         if (!auto_addr)
 547                 goto skip_mask_ext;
 548
 549         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 550                 ;
 551         j = 0;
 552         if (i < ETH_ALEN) {
 553                 j = (5 - i) * 8;
 554
 555                 while (mask[i] != 0) {
 556                         mask[i] >>= 1;
 557                         j++;
 558                 }
 559         }
 560
 561         if (bits < j)
 562                 bits = j;
 563
 564         if (bits > 40) {
 565                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 566                            bits);
 567                 return -1;
 568         }
 569
 570         os_memset(mask, 0xff, ETH_ALEN);
 571         j = bits / 8;
 572         for (i = 5; i > 5 - j; i--)
 573                 mask[i] = 0;
 574         j = bits % 8;
 575         while (j--)
 576                 mask[i] <<= 1;
 577
 578 skip_mask_ext:
 579         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 580                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 581
 582         if (!auto_addr)
 583                 return 0;
 584
 585         for (i = 0; i < ETH_ALEN; i++) {
 586                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 587                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 588                                    " for start address " MACSTR ".",
 589                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 590                         wpa_printf(MSG_ERROR, "Start address must be the "
 591                                    "first address in the block (i.e., addr "
 592                                    "AND mask == addr).");
 593                         return -1;
 594                 }
 595         }
 596
 597         return 0;
 598 }
 599
 600
 601 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 602 {
 603         size_t i;
 604
 605         for (i = 0; i < conf->num_bss; i++) {
 606                 if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
 607                         return 1;
 608                 }
 609         }
 610
 611         return 0;
 612 }
 613
 614
 615 #ifndef CONFIG_NO_RADIUS
 616
 617 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 618                                     struct radius_das_attrs *attr)
 619 {
 620         if (attr->nas_identifier &&
 621             (!hapd->conf->nas_identifier ||
 622              os_strlen(hapd->conf->nas_identifier) !=
 623              attr->nas_identifier_len ||
 624              os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
 625                        attr->nas_identifier_len) != 0)) {
 626                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
 627                 return 1;
 628         }
 629
 630         if (attr->nas_ip_addr &&
 631             (hapd->conf->own_ip_addr.af != AF_INET ||
 632              os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
 633              0)) {
 634                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
 635                 return 1;
 636         }
 637
 638 #ifdef CONFIG_IPV6
 639         if (attr->nas_ipv6_addr &&
 640             (hapd->conf->own_ip_addr.af != AF_INET6 ||
 641              os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
 642              != 0)) {
 643                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
 644                 return 1;
 645         }
 646 #endif /* CONFIG_IPV6 */
 647
 648         return 0;
 649 }
 650
 651
 652 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 653                                               struct radius_das_attrs *attr,
 654                                               int *multi)
 655 {
 656         struct sta_info *selected, *sta;
 657         char buf[128];
 658         int num_attr = 0;
 659         int count;
 660
 661         *multi = 0;
 662
 663         for (sta = hapd->sta_list; sta; sta = sta->next)
 664                 sta->radius_das_match = 1;
 665
 666         if (attr->sta_addr) {
 667                 num_attr++;
 668                 sta = ap_get_sta(hapd, attr->sta_addr);
 669                 if (!sta) {
 670                         wpa_printf(MSG_DEBUG,
 671                                    "RADIUS DAS: No Calling-Station-Id match");
 672                         return NULL;
 673                 }
 674
 675                 selected = sta;
 676                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 677                         if (sta != selected)
 678                                 sta->radius_das_match = 0;
 679                 }
 680                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Calling-Station-Id match");
 681         }
 682
 683         if (attr->acct_session_id) {
 684                 num_attr++;
 685                 if (attr->acct_session_id_len != 16) {
 686                         wpa_printf(MSG_DEBUG,
 687                                    "RADIUS DAS: Acct-Session-Id cannot match");
 688                         return NULL;
 689                 }
 690                 count = 0;
 691
 692                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 693                         if (!sta->radius_das_match)
 694                                 continue;
 695                         os_snprintf(buf, sizeof(buf), "%016llX",
 696                                     (unsigned long long) sta->acct_session_id);
 697                         if (os_memcmp(attr->acct_session_id, buf, 16) != 0)
 698                                 sta->radius_das_match = 0;
 699                         else
 700                                 count++;
 701                 }
 702
 703                 if (count == 0) {
 704                         wpa_printf(MSG_DEBUG,
 705                                    "RADIUS DAS: No matches remaining after Acct-Session-Id check");
 706                         return NULL;
 707                 }
 708                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Acct-Session-Id match");
 709         }
 710
 711         if (attr->acct_multi_session_id) {
 712                 num_attr++;
 713                 if (attr->acct_multi_session_id_len != 16) {
 714                         wpa_printf(MSG_DEBUG,
 715                                    "RADIUS DAS: Acct-Multi-Session-Id cannot match");
 716                         return NULL;
 717                 }
 718                 count = 0;
 719
 720                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 721                         if (!sta->radius_das_match)
 722                                 continue;
 723                         if (!sta->eapol_sm ||
 724                             !sta->eapol_sm->acct_multi_session_id) {
 725                                 sta->radius_das_match = 0;
 726                                 continue;
 727                         }
 728                         os_snprintf(buf, sizeof(buf), "%016llX",
 729                                     (unsigned long long)
 730                                     sta->eapol_sm->acct_multi_session_id);
 731                         if (os_memcmp(attr->acct_multi_session_id, buf, 16) !=
 732                             0)
 733                                 sta->radius_das_match = 0;
 734                         else
 735                                 count++;
 736                 }
 737
 738                 if (count == 0) {
 739                         wpa_printf(MSG_DEBUG,
 740                                    "RADIUS DAS: No matches remaining after Acct-Multi-Session-Id check");
 741                         return NULL;
 742                 }
 743                 wpa_printf(MSG_DEBUG,
 744                            "RADIUS DAS: Acct-Multi-Session-Id match");
 745         }
 746
 747         if (attr->cui) {
 748                 num_attr++;
 749                 count = 0;
 750
 751                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 752                         struct wpabuf *cui;
 753
 754                         if (!sta->radius_das_match)
 755                                 continue;
 756                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 757                         if (!cui || wpabuf_len(cui) != attr->cui_len ||
 758                             os_memcmp(wpabuf_head(cui), attr->cui,
 759                                       attr->cui_len) != 0)
 760                                 sta->radius_das_match = 0;
 761                         else
 762                                 count++;
 763                 }
 764
 765                 if (count == 0) {
 766                         wpa_printf(MSG_DEBUG,
 767                                    "RADIUS DAS: No matches remaining after Chargeable-User-Identity check");
 768                         return NULL;
 769                 }
 770                 wpa_printf(MSG_DEBUG,
 771                            "RADIUS DAS: Chargeable-User-Identity match");
 772         }
 773
 774         if (attr->user_name) {
 775                 num_attr++;
 776                 count = 0;
 777
 778                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 779                         u8 *identity;
 780                         size_t identity_len;
 781
 782                         if (!sta->radius_das_match)
 783                                 continue;
 784                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 785                                                            &identity_len);
 786                         if (!identity ||
 787                             identity_len != attr->user_name_len ||
 788                             os_memcmp(identity, attr->user_name, identity_len)
 789                             != 0)
 790                                 sta->radius_das_match = 0;
 791                         else
 792                                 count++;
 793                 }
 794
 795                 if (count == 0) {
 796                         wpa_printf(MSG_DEBUG,
 797                                    "RADIUS DAS: No matches remaining after User-Name check");
 798                         return NULL;
 799                 }
 800                 wpa_printf(MSG_DEBUG,
 801                            "RADIUS DAS: User-Name match");
 802         }
 803
 804         if (num_attr == 0) {
 805                 /*
 806                  * In theory, we could match all current associations, but it
 807                  * seems safer to just reject requests that do not include any
 808                  * session identification attributes.
 809                  */
 810                 wpa_printf(MSG_DEBUG,
 811                            "RADIUS DAS: No session identification attributes included");
 812                 return NULL;
 813         }
 814
 815         selected = NULL;
 816         for (sta = hapd->sta_list; sta; sta = sta->next) {
 817                 if (sta->radius_das_match) {
 818                         if (selected) {
 819                                 *multi = 1;
 820                                 return NULL;
 821                         }
 822                         selected = sta;
 823                 }
 824         }
 825
 826         return selected;
 827 }
 828
 829
 830 static int hostapd_das_disconnect_pmksa(struct hostapd_data *hapd,
 831                                         struct radius_das_attrs *attr)
 832 {
 833         if (!hapd->wpa_auth)
 834                 return -1;
 835         return wpa_auth_radius_das_disconnect_pmksa(hapd->wpa_auth, attr);
 836 }
 837
 838
 839 static enum radius_das_res
 840 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 841 {
 842         struct hostapd_data *hapd = ctx;
 843         struct sta_info *sta;
 844         int multi;
 845
 846         if (hostapd_das_nas_mismatch(hapd, attr))
 847                 return RADIUS_DAS_NAS_MISMATCH;
 848
 849         sta = hostapd_das_find_sta(hapd, attr, &multi);
 850         if (sta == NULL) {
 851                 if (multi) {
 852                         wpa_printf(MSG_DEBUG,
 853                                    "RADIUS DAS: Multiple sessions match - not supported");
 854                         return RADIUS_DAS_MULTI_SESSION_MATCH;
 855                 }
 856                 if (hostapd_das_disconnect_pmksa(hapd, attr) == 0) {
 857                         wpa_printf(MSG_DEBUG,
 858                                    "RADIUS DAS: PMKSA cache entry matched");
 859                         return RADIUS_DAS_SUCCESS;
 860                 }
 861                 wpa_printf(MSG_DEBUG, "RADIUS DAS: No matching session found");
 862                 return RADIUS_DAS_SESSION_NOT_FOUND;
 863         }
 864
 865         wpa_printf(MSG_DEBUG, "RADIUS DAS: Found a matching session " MACSTR
 866                    " - disconnecting", MAC2STR(sta->addr));
 867         wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
 868
 869         hostapd_drv_sta_deauth(hapd, sta->addr,
 870                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 871         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 872
 873         return RADIUS_DAS_SUCCESS;
 874 }
 875
 876 #endif /* CONFIG_NO_RADIUS */
 877
 878
 879 /**
 880  * hostapd_setup_bss - Per-BSS setup (initialization)
 881  * @hapd: Pointer to BSS data
 882  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
 883  *      but interface may exist
 884  *
 885  * This function is used to initialize all per-BSS data structures and
 886  * resources. This gets called in a loop for each BSS when an interface is
 887  * initialized. Most of the modules that are initialized here will be
 888  * deinitialized in hostapd_cleanup().
 889  */
 890 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 891 {
 892         struct hostapd_bss_config *conf = hapd->conf;
 893         u8 ssid[SSID_MAX_LEN + 1];
 894         int ssid_len, set_ssid;
 895         char force_ifname[IFNAMSIZ];
 896         u8 if_addr[ETH_ALEN];
 897         int flush_old_stations = 1;
 898
 899         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 900                    __func__, hapd, conf->iface, first);
 901
 902 #ifdef EAP_SERVER_TNC
 903         if (conf->tnc && tncs_global_init() < 0) {
 904                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 905                 return -1;
 906         }
 907 #endif /* EAP_SERVER_TNC */
 908
 909         if (hapd->started) {
 910                 wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
 911                            __func__, conf->iface);
 912                 return -1;
 913         }
 914         hapd->started = 1;
 915
 916         if (!first || first == -1) {
 917                 u8 *addr = hapd->own_addr;
 918
 919                 if (!is_zero_ether_addr(conf->bssid)) {
 920                         /* Allocate the configured BSSID. */
 921                         os_memcpy(hapd->own_addr, conf->bssid, ETH_ALEN);
 922
 923                         if (hostapd_mac_comp(hapd->own_addr,
 924                                              hapd->iface->bss[0]->own_addr) ==
 925                             0) {
 926                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 927                                            "BSSID set to the MAC address of "
 928                                            "the radio", conf->iface);
 929                                 return -1;
 930                         }
 931                 } else if (hapd->iconf->use_driver_iface_addr) {
 932                         addr = NULL;
 933                 } else {
 934                         /* Allocate the next available BSSID. */
 935                         do {
 936                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 937                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 938                 }
 939
 940                 hapd->interface_added = 1;
 941                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 942                                    conf->iface, addr, hapd,
 943                                    &hapd->drv_priv, force_ifname, if_addr,
 944                                    conf->bridge[0] ? conf->bridge : NULL,
 945                                    first == -1)) {
 946                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 947                                    MACSTR ")", MAC2STR(hapd->own_addr));
 948                         hapd->interface_added = 0;
 949                         return -1;
 950                 }
 951
 952                 if (!addr)
 953                         os_memcpy(hapd->own_addr, if_addr, ETH_ALEN);
 954         }
 955
 956         if (conf->wmm_enabled < 0)
 957                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 958
 959 #ifdef CONFIG_IEEE80211R
 960         if (is_zero_ether_addr(conf->r1_key_holder))
 961                 os_memcpy(conf->r1_key_holder, hapd->own_addr, ETH_ALEN);
 962 #endif /* CONFIG_IEEE80211R */
 963
 964 #ifdef CONFIG_MESH
 965         if (hapd->iface->mconf == NULL)
 966                 flush_old_stations = 0;
 967 #endif /* CONFIG_MESH */
 968
 969         if (flush_old_stations)
 970                 hostapd_flush_old_stations(hapd,
 971                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 972         hostapd_set_privacy(hapd, 0);
 973
 974         hostapd_broadcast_wep_clear(hapd);
 975         if (hostapd_setup_encryption(conf->iface, hapd))
 976                 return -1;
 977
 978         /*
 979          * Fetch the SSID from the system and use it or,
 980          * if one was specified in the config file, verify they
 981          * match.
 982          */
 983         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 984         if (ssid_len < 0) {
 985                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 986                 return -1;
 987         }
 988         if (conf->ssid.ssid_set) {
 989                 /*
 990                  * If SSID is specified in the config file and it differs
 991                  * from what is being used then force installation of the
 992                  * new SSID.
 993                  */
 994                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 995                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 996         } else {
 997                 /*
 998                  * No SSID in the config file; just use the one we got
 999                  * from the system.
1000                  */
1001                 set_ssid = 0;
1002                 conf->ssid.ssid_len = ssid_len;
1003                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
1004         }
1005
1006         if (!hostapd_drv_none(hapd)) {
1007                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
1008                            " and ssid \"%s\"",
1009                            conf->iface, MAC2STR(hapd->own_addr),
1010                            wpa_ssid_txt(conf->ssid.ssid, conf->ssid.ssid_len));
1011         }
1012
1013         if (hostapd_setup_wpa_psk(conf)) {
1014                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
1015                 return -1;
1016         }
1017
1018         /* Set SSID for the kernel driver (to be used in beacon and probe
1019          * response frames) */
1020         if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
1021                                          conf->ssid.ssid_len)) {
1022                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
1023                 return -1;
1024         }
1025
1026         if (wpa_debug_level <= MSG_MSGDUMP)
1027                 conf->radius->msg_dumps = 1;
1028 #ifndef CONFIG_NO_RADIUS
1029         hapd->radius = radius_client_init(hapd, conf->radius);
1030         if (hapd->radius == NULL) {
1031                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
1032                 return -1;
1033         }
1034
1035         if (conf->radius_das_port) {
1036                 struct radius_das_conf das_conf;
1037                 os_memset(&das_conf, 0, sizeof(das_conf));
1038                 das_conf.port = conf->radius_das_port;
1039                 das_conf.shared_secret = conf->radius_das_shared_secret;
1040                 das_conf.shared_secret_len =
1041                         conf->radius_das_shared_secret_len;
1042                 das_conf.client_addr = &conf->radius_das_client_addr;
1043                 das_conf.time_window = conf->radius_das_time_window;
1044                 das_conf.require_event_timestamp =
1045                         conf->radius_das_require_event_timestamp;
1046                 das_conf.require_message_authenticator =
1047                         conf->radius_das_require_message_authenticator;
1048                 das_conf.ctx = hapd;
1049                 das_conf.disconnect = hostapd_das_disconnect;
1050                 hapd->radius_das = radius_das_init(&das_conf);
1051                 if (hapd->radius_das == NULL) {
1052                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
1053                                    "failed.");
1054                         return -1;
1055                 }
1056         }
1057 #endif /* CONFIG_NO_RADIUS */
1058
1059         if (hostapd_acl_init(hapd)) {
1060                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
1061                 return -1;
1062         }
1063         if (hostapd_init_wps(hapd, conf))
1064                 return -1;
1065
1066         if (authsrv_init(hapd) < 0)
1067                 return -1;
1068
1069         if (ieee802_1x_init(hapd)) {
1070                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
1071                 return -1;
1072         }
1073
1074         if ((conf->wpa || conf->osen) && hostapd_setup_wpa(hapd))
1075                 return -1;
1076
1077         if (accounting_init(hapd)) {
1078                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
1079                 return -1;
1080         }
1081
1082         if (conf->ieee802_11f &&
1083             (hapd->iapp = iapp_init(hapd, conf->iapp_iface)) == NULL) {
1084                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
1085                            "failed.");
1086                 return -1;
1087         }
1088
1089 #ifdef CONFIG_INTERWORKING
1090         if (gas_serv_init(hapd)) {
1091                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
1092                 return -1;
1093         }
1094
1095         if (conf->qos_map_set_len &&
1096             hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
1097                                     conf->qos_map_set_len)) {
1098                 wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
1099                 return -1;
1100         }
1101 #endif /* CONFIG_INTERWORKING */
1102
1103         if (conf->bss_load_update_period && bss_load_update_init(hapd)) {
1104                 wpa_printf(MSG_ERROR, "BSS Load initialization failed");
1105                 return -1;
1106         }
1107
1108         if (conf->proxy_arp) {
1109                 if (x_snoop_init(hapd)) {
1110                         wpa_printf(MSG_ERROR,
1111                                    "Generic snooping infrastructure initialization failed");
1112                         return -1;
1113                 }
1114
1115                 if (dhcp_snoop_init(hapd)) {
1116                         wpa_printf(MSG_ERROR,
1117                                    "DHCP snooping initialization failed");
1118                         return -1;
1119                 }
1120
1121                 if (ndisc_snoop_init(hapd)) {
1122                         wpa_printf(MSG_ERROR,
1123                                    "Neighbor Discovery snooping initialization failed");
1124                         return -1;
1125                 }
1126         }
1127
1128         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
1129                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
1130                 return -1;
1131         }
1132
1133         if (!conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
1134                 return -1;
1135
1136         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
1137                 return -1;
1138
1139         if (hapd->driver && hapd->driver->set_operstate)
1140                 hapd->driver->set_operstate(hapd->drv_priv, 1);
1141
1142         return 0;
1143 }
1144
1145
1146 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
1147 {
1148         struct hostapd_data *hapd = iface->bss[0];
1149         int i;
1150         struct hostapd_tx_queue_params *p;
1151
1152 #ifdef CONFIG_MESH
1153         if (iface->mconf == NULL)
1154                 return;
1155 #endif /* CONFIG_MESH */
1156
1157         for (i = 0; i < NUM_TX_QUEUES; i++) {
1158                 p = &iface->conf->tx_queue[i];
1159
1160                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
1161                                                 p->cwmax, p->burst)) {
1162                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
1163                                    "parameters for queue %d.", i);
1164                         /* Continue anyway */
1165                 }
1166         }
1167 }
1168
1169
1170 static int hostapd_set_acl_list(struct hostapd_data *hapd,
1171                                 struct mac_acl_entry *mac_acl,
1172                                 int n_entries, u8 accept_acl)
1173 {
1174         struct hostapd_acl_params *acl_params;
1175         int i, err;
1176
1177         acl_params = os_zalloc(sizeof(*acl_params) +
1178                                (n_entries * sizeof(acl_params->mac_acl[0])));
1179         if (!acl_params)
1180                 return -ENOMEM;
1181
1182         for (i = 0; i < n_entries; i++)
1183                 os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
1184                           ETH_ALEN);
1185
1186         acl_params->acl_policy = accept_acl;
1187         acl_params->num_mac_acl = n_entries;
1188
1189         err = hostapd_drv_set_acl(hapd, acl_params);
1190
1191         os_free(acl_params);
1192
1193         return err;
1194 }
1195
1196
1197 static void hostapd_set_acl(struct hostapd_data *hapd)
1198 {
1199         struct hostapd_config *conf = hapd->iconf;
1200         int err;
1201         u8 accept_acl;
1202
1203         if (hapd->iface->drv_max_acl_mac_addrs == 0)
1204                 return;
1205
1206         if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
1207                 accept_acl = 1;
1208                 err = hostapd_set_acl_list(hapd, conf->bss[0]->accept_mac,
1209                                            conf->bss[0]->num_accept_mac,
1210                                            accept_acl);
1211                 if (err) {
1212                         wpa_printf(MSG_DEBUG, "Failed to set accept acl");
1213                         return;
1214                 }
1215         } else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
1216                 accept_acl = 0;
1217                 err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
1218                                            conf->bss[0]->num_deny_mac,
1219                                            accept_acl);
1220                 if (err) {
1221                         wpa_printf(MSG_DEBUG, "Failed to set deny acl");
1222                         return;
1223                 }
1224         }
1225 }
1226
1227
1228 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
1229 {
1230         if (!hapd->iface->interfaces ||
1231             !hapd->iface->interfaces->ctrl_iface_init)
1232                 return 0;
1233
1234         if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
1235                 wpa_printf(MSG_ERROR,
1236                            "Failed to setup control interface for %s",
1237                            hapd->conf->iface);
1238                 return -1;
1239         }
1240
1241         return 0;
1242 }
1243
1244
1245 static int start_ctrl_iface(struct hostapd_iface *iface)
1246 {
1247         size_t i;
1248
1249         if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
1250                 return 0;
1251
1252         for (i = 0; i < iface->num_bss; i++) {
1253                 struct hostapd_data *hapd = iface->bss[i];
1254                 if (iface->interfaces->ctrl_iface_init(hapd)) {
1255                         wpa_printf(MSG_ERROR,
1256                                    "Failed to setup control interface for %s",
1257                                    hapd->conf->iface);
1258                         return -1;
1259                 }
1260         }
1261
1262         return 0;
1263 }
1264
1265
1266 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
1267 {
1268         struct hostapd_iface *iface = eloop_ctx;
1269
1270         if (!iface->wait_channel_update) {
1271                 wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
1272                 return;
1273         }
1274
1275         /*
1276          * It is possible that the existing channel list is acceptable, so try
1277          * to proceed.
1278          */
1279         wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
1280         setup_interface2(iface);
1281 }
1282
1283
1284 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1285 {
1286         if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1287                 return;
1288
1289         wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1290         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1291         setup_interface2(iface);
1292 }
1293
1294
1295 static int setup_interface(struct hostapd_iface *iface)
1296 {
1297         struct hostapd_data *hapd = iface->bss[0];
1298         size_t i;
1299
1300         /*
1301          * It is possible that setup_interface() is called after the interface
1302          * was disabled etc., in which case driver_ap_teardown is possibly set
1303          * to 1. Clear it here so any other key/station deletion, which is not
1304          * part of a teardown flow, would also call the relevant driver
1305          * callbacks.
1306          */
1307         iface->driver_ap_teardown = 0;
1308
1309         if (!iface->phy[0]) {
1310                 const char *phy = hostapd_drv_get_radio_name(hapd);
1311                 if (phy) {
1312                         wpa_printf(MSG_DEBUG, "phy: %s", phy);
1313                         os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1314                 }
1315         }
1316
1317         /*
1318          * Make sure that all BSSes get configured with a pointer to the same
1319          * driver interface.
1320          */
1321         for (i = 1; i < iface->num_bss; i++) {
1322                 iface->bss[i]->driver = hapd->driver;
1323                 iface->bss[i]->drv_priv = hapd->drv_priv;
1324         }
1325
1326         if (hostapd_validate_bssid_configuration(iface))
1327                 return -1;
1328
1329         /*
1330          * Initialize control interfaces early to allow external monitoring of
1331          * channel setup operations that may take considerable amount of time
1332          * especially for DFS cases.
1333          */
1334         if (start_ctrl_iface(iface))
1335                 return -1;
1336
1337         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1338                 char country[4], previous_country[4];
1339
1340                 hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1341                 if (hostapd_get_country(hapd, previous_country) < 0)
1342                         previous_country[0] = '\0';
1343
1344                 os_memcpy(country, hapd->iconf->country, 3);
1345                 country[3] = '\0';
1346                 if (hostapd_set_country(hapd, country) < 0) {
1347                         wpa_printf(MSG_ERROR, "Failed to set country code");
1348                         return -1;
1349                 }
1350
1351                 wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1352                            previous_country, country);
1353
1354                 if (os_strncmp(previous_country, country, 2) != 0) {
1355                         wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1356                         iface->wait_channel_update = 1;
1357                         eloop_register_timeout(5, 0,
1358                                                channel_list_update_timeout,
1359                                                iface, NULL);
1360                         return 0;
1361                 }
1362         }
1363
1364         return setup_interface2(iface);
1365 }
1366
1367
1368 static int setup_interface2(struct hostapd_iface *iface)
1369 {
1370         iface->wait_channel_update = 0;
1371
1372         if (hostapd_get_hw_features(iface)) {
1373                 /* Not all drivers support this yet, so continue without hw
1374                  * feature data. */
1375         } else {
1376                 int ret = hostapd_select_hw_mode(iface);
1377                 if (ret < 0) {
1378                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1379                                    "channel. (%d)", ret);
1380                         goto fail;
1381                 }
1382                 if (ret == 1) {
1383                         wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1384                         return 0;
1385                 }
1386                 ret = hostapd_check_ht_capab(iface);
1387                 if (ret < 0)
1388                         goto fail;
1389                 if (ret == 1) {
1390                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1391                                    "be completed in a callback");
1392                         return 0;
1393                 }
1394
1395                 if (iface->conf->ieee80211h)
1396                         wpa_printf(MSG_DEBUG, "DFS support is enabled");
1397         }
1398         return hostapd_setup_interface_complete(iface, 0);
1399
1400 fail:
1401         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1402         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1403         if (iface->interfaces && iface->interfaces->terminate_on_error)
1404                 eloop_terminate();
1405         return -1;
1406 }
1407
1408
1409 #ifdef CONFIG_FST
1410
1411 static const u8 * fst_hostapd_get_bssid_cb(void *ctx)
1412 {
1413         struct hostapd_data *hapd = ctx;
1414
1415         return hapd->own_addr;
1416 }
1417
1418
1419 static void fst_hostapd_get_channel_info_cb(void *ctx,
1420                                             enum hostapd_hw_mode *hw_mode,
1421                                             u8 *channel)
1422 {
1423         struct hostapd_data *hapd = ctx;
1424
1425         *hw_mode = ieee80211_freq_to_chan(hapd->iface->freq, channel);
1426 }
1427
1428
1429 static void fst_hostapd_set_ies_cb(void *ctx, const struct wpabuf *fst_ies)
1430 {
1431         struct hostapd_data *hapd = ctx;
1432
1433         if (hapd->iface->fst_ies != fst_ies) {
1434                 hapd->iface->fst_ies = fst_ies;
1435                 if (ieee802_11_set_beacon(hapd))
1436                         wpa_printf(MSG_WARNING, "FST: Cannot set beacon");
1437         }
1438 }
1439
1440
1441 static int fst_hostapd_send_action_cb(void *ctx, const u8 *da,
1442                                       struct wpabuf *buf)
1443 {
1444         struct hostapd_data *hapd = ctx;
1445
1446         return hostapd_drv_send_action(hapd, hapd->iface->freq, 0, da,
1447                                        wpabuf_head(buf), wpabuf_len(buf));
1448 }
1449
1450
1451 static const struct wpabuf * fst_hostapd_get_mb_ie_cb(void *ctx, const u8 *addr)
1452 {
1453         struct hostapd_data *hapd = ctx;
1454         struct sta_info *sta = ap_get_sta(hapd, addr);
1455
1456         return sta ? sta->mb_ies : NULL;
1457 }
1458
1459
1460 static void fst_hostapd_update_mb_ie_cb(void *ctx, const u8 *addr,
1461                                         const u8 *buf, size_t size)
1462 {
1463         struct hostapd_data *hapd = ctx;
1464         struct sta_info *sta = ap_get_sta(hapd, addr);
1465
1466         if (sta) {
1467                 struct mb_ies_info info;
1468
1469                 if (!mb_ies_info_by_ies(&info, buf, size)) {
1470                         wpabuf_free(sta->mb_ies);
1471                         sta->mb_ies = mb_ies_by_info(&info);
1472                 }
1473         }
1474 }
1475
1476
1477 static const u8 * fst_hostapd_get_sta(struct fst_get_peer_ctx **get_ctx,
1478                                       Boolean mb_only)
1479 {
1480         struct sta_info *s = (struct sta_info *) *get_ctx;
1481
1482         if (mb_only) {
1483                 for (; s && !s->mb_ies; s = s->next)
1484                         ;
1485         }
1486
1487         if (s) {
1488                 *get_ctx = (struct fst_get_peer_ctx *) s->next;
1489
1490                 return s->addr;
1491         }
1492
1493         *get_ctx = NULL;
1494         return NULL;
1495 }
1496
1497
1498 static const u8 * fst_hostapd_get_peer_first(void *ctx,
1499                                              struct fst_get_peer_ctx **get_ctx,
1500                                              Boolean mb_only)
1501 {
1502         struct hostapd_data *hapd = ctx;
1503
1504         *get_ctx = (struct fst_get_peer_ctx *) hapd->sta_list;
1505
1506         return fst_hostapd_get_sta(get_ctx, mb_only);
1507 }
1508
1509
1510 static const u8 * fst_hostapd_get_peer_next(void *ctx,
1511                                             struct fst_get_peer_ctx **get_ctx,
1512                                             Boolean mb_only)
1513 {
1514         return fst_hostapd_get_sta(get_ctx, mb_only);
1515 }
1516
1517
1518 void fst_hostapd_fill_iface_obj(struct hostapd_data *hapd,
1519                                 struct fst_wpa_obj *iface_obj)
1520 {
1521         iface_obj->ctx = hapd;
1522         iface_obj->get_bssid = fst_hostapd_get_bssid_cb;
1523         iface_obj->get_channel_info = fst_hostapd_get_channel_info_cb;
1524         iface_obj->set_ies = fst_hostapd_set_ies_cb;
1525         iface_obj->send_action = fst_hostapd_send_action_cb;
1526         iface_obj->get_mb_ie = fst_hostapd_get_mb_ie_cb;
1527         iface_obj->update_mb_ie = fst_hostapd_update_mb_ie_cb;
1528         iface_obj->get_peer_first = fst_hostapd_get_peer_first;
1529         iface_obj->get_peer_next = fst_hostapd_get_peer_next;
1530 }
1531
1532 #endif /* CONFIG_FST */
1533
1534
1535 #ifdef NEED_AP_MLME
1536 static enum nr_chan_width hostapd_get_nr_chan_width(struct hostapd_data *hapd,
1537                                                     int ht, int vht)
1538 {
1539         if (!ht && !vht)
1540                 return NR_CHAN_WIDTH_20;
1541         if (!hapd->iconf->secondary_channel)
1542                 return NR_CHAN_WIDTH_20;
1543         if (!vht || hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_USE_HT)
1544                 return NR_CHAN_WIDTH_40;
1545         if (hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_80MHZ)
1546                 return NR_CHAN_WIDTH_80;
1547         if (hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_160MHZ)
1548                 return NR_CHAN_WIDTH_160;
1549         if (hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_80P80MHZ)
1550                 return NR_CHAN_WIDTH_80P80;
1551         return NR_CHAN_WIDTH_20;
1552 }
1553 #endif /* NEED_AP_MLME */
1554
1555
1556 static void hostapd_set_own_neighbor_report(struct hostapd_data *hapd)
1557 {
1558 #ifdef NEED_AP_MLME
1559         u16 capab = hostapd_own_capab_info(hapd);
1560         int ht = hapd->iconf->ieee80211n && !hapd->conf->disable_11n;
1561         int vht = hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac;
1562         struct wpa_ssid_value ssid;
1563         u8 channel, op_class;
1564         int center_freq1 = 0, center_freq2 = 0;
1565         enum nr_chan_width width;
1566         u32 bssid_info;
1567         struct wpabuf *nr;
1568
1569         if (!(hapd->conf->radio_measurements[0] &
1570               WLAN_RRM_CAPS_NEIGHBOR_REPORT))
1571                 return;
1572
1573         bssid_info = 3; /* AP is reachable */
1574         bssid_info |= NEI_REP_BSSID_INFO_SECURITY; /* "same as the AP" */
1575         bssid_info |= NEI_REP_BSSID_INFO_KEY_SCOPE; /* "same as the AP" */
1576
1577         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT)
1578                 bssid_info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
1579
1580         bssid_info |= NEI_REP_BSSID_INFO_RM; /* RRM is supported */
1581
1582         if (hapd->conf->wmm_enabled) {
1583                 bssid_info |= NEI_REP_BSSID_INFO_QOS;
1584
1585                 if (hapd->conf->wmm_uapsd &&
1586                     (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_UAPSD))
1587                         bssid_info |= NEI_REP_BSSID_INFO_APSD;
1588         }
1589
1590         if (ht) {
1591                 bssid_info |= NEI_REP_BSSID_INFO_HT |
1592                         NEI_REP_BSSID_INFO_DELAYED_BA;
1593
1594                 /* VHT bit added in IEEE P802.11-REVmc/D4.3 */
1595                 if (vht)
1596                         bssid_info |= NEI_REP_BSSID_INFO_VHT;
1597         }
1598
1599         /* TODO: Set NEI_REP_BSSID_INFO_MOBILITY_DOMAIN if MDE is set */
1600
1601         ieee80211_freq_to_channel_ext(hapd->iface->freq,
1602                                       hapd->iconf->secondary_channel,
1603                                       hapd->iconf->vht_oper_chwidth,
1604                                       &op_class, &channel);
1605         width = hostapd_get_nr_chan_width(hapd, ht, vht);
1606         if (vht) {
1607                 center_freq1 = ieee80211_chan_to_freq(
1608                         NULL, op_class,
1609                         hapd->iconf->vht_oper_centr_freq_seg0_idx);
1610                 if (width == NR_CHAN_WIDTH_80P80)
1611                         center_freq2 = ieee80211_chan_to_freq(
1612                                 NULL, op_class,
1613                                 hapd->iconf->vht_oper_centr_freq_seg1_idx);
1614         } else if (ht) {
1615                 center_freq1 = hapd->iface->freq +
1616                         10 * hapd->iconf->secondary_channel;
1617         }
1618
1619         ssid.ssid_len = hapd->conf->ssid.ssid_len;
1620         os_memcpy(ssid.ssid, hapd->conf->ssid.ssid, ssid.ssid_len);
1621
1622         /*
1623          * Neighbor Report element size = BSSID + BSSID info + op_class + chan +
1624          * phy type + wide bandwidth channel subelement.
1625          */
1626         nr = wpabuf_alloc(ETH_ALEN + 4 + 1 + 1 + 1 + 5);
1627         if (!nr)
1628                 return;
1629
1630         wpabuf_put_data(nr, hapd->own_addr, ETH_ALEN);
1631         wpabuf_put_le32(nr, bssid_info);
1632         wpabuf_put_u8(nr, op_class);
1633         wpabuf_put_u8(nr, channel);
1634         wpabuf_put_u8(nr, ieee80211_get_phy_type(hapd->iface->freq, ht, vht));
1635
1636         /*
1637          * Wide Bandwidth Channel subelement may be needed to allow the
1638          * receiving STA to send packets to the AP. See IEEE P802.11-REVmc/D5.0
1639          * Figure 9-301.
1640          */
1641         wpabuf_put_u8(nr, WNM_NEIGHBOR_WIDE_BW_CHAN);
1642         wpabuf_put_u8(nr, 3);
1643         wpabuf_put_u8(nr, width);
1644         wpabuf_put_u8(nr, center_freq1);
1645         wpabuf_put_u8(nr, center_freq2);
1646
1647         hostapd_neighbor_set(hapd, hapd->own_addr, &ssid, nr, hapd->iconf->lci,
1648                              hapd->iconf->civic);
1649
1650         wpabuf_free(nr);
1651 #endif /* NEED_AP_MLME */
1652 }
1653
1654
1655 static int hostapd_setup_interface_complete_sync(struct hostapd_iface *iface,
1656                                                  int err)
1657 {
1658         struct hostapd_data *hapd = iface->bss[0];
1659         size_t j;
1660         u8 *prev_addr;
1661         int delay_apply_cfg = 0;
1662         int res_dfs_offload = 0;
1663
1664         if (err)
1665                 goto fail;
1666
1667         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1668         if (iface->conf->channel) {
1669 #ifdef NEED_AP_MLME
1670                 int res;
1671 #endif /* NEED_AP_MLME */
1672
1673                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1674                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1675                            "Frequency: %d MHz",
1676                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1677                            iface->conf->channel, iface->freq);
1678
1679 #ifdef NEED_AP_MLME
1680                 /* Handle DFS only if it is not offloaded to the driver */
1681                 if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
1682                         /* Check DFS */
1683                         res = hostapd_handle_dfs(iface);
1684                         if (res <= 0) {
1685                                 if (res < 0)
1686                                         goto fail;
1687                                 return res;
1688                         }
1689                 } else {
1690                         /* If DFS is offloaded to the driver */
1691                         res_dfs_offload = hostapd_handle_dfs_offload(iface);
1692                         if (res_dfs_offload <= 0) {
1693                                 if (res_dfs_offload < 0)
1694                                         goto fail;
1695                         } else {
1696                                 wpa_printf(MSG_DEBUG,
1697                                            "Proceed with AP/channel setup");
1698                                 /*
1699                                  * If this is a DFS channel, move to completing
1700                                  * AP setup.
1701                                  */
1702                                 if (res_dfs_offload == 1)
1703                                         goto dfs_offload;
1704                                 /* Otherwise fall through. */
1705                         }
1706                 }
1707 #endif /* NEED_AP_MLME */
1708
1709 #ifdef CONFIG_MESH
1710                 if (iface->mconf != NULL) {
1711                         wpa_printf(MSG_DEBUG,
1712                                    "%s: Mesh configuration will be applied while joining the mesh network",
1713                                    iface->bss[0]->conf->iface);
1714                         delay_apply_cfg = 1;
1715                 }
1716 #endif /* CONFIG_MESH */
1717
1718                 if (!delay_apply_cfg &&
1719                     hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1720                                      hapd->iconf->channel,
1721                                      hapd->iconf->ieee80211n,
1722                                      hapd->iconf->ieee80211ac,
1723                                      hapd->iconf->secondary_channel,
1724                                      hapd->iconf->vht_oper_chwidth,
1725                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1726                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1727                         wpa_printf(MSG_ERROR, "Could not set channel for "
1728                                    "kernel driver");
1729                         goto fail;
1730                 }
1731         }
1732
1733         if (iface->current_mode) {
1734                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1735                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1736                                    "table.");
1737                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1738                                        HOSTAPD_LEVEL_WARNING,
1739                                        "Failed to prepare rates table.");
1740                         goto fail;
1741                 }
1742         }
1743
1744         if (hapd->iconf->rts_threshold > -1 &&
1745             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1746                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1747                            "kernel driver");
1748                 goto fail;
1749         }
1750
1751         if (hapd->iconf->fragm_threshold > -1 &&
1752             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1753                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1754                            "for kernel driver");
1755                 goto fail;
1756         }
1757
1758         prev_addr = hapd->own_addr;
1759
1760         for (j = 0; j < iface->num_bss; j++) {
1761                 hapd = iface->bss[j];
1762                 if (j)
1763                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1764                 if (hostapd_setup_bss(hapd, j == 0)) {
1765                         do {
1766                                 hapd = iface->bss[j];
1767                                 hostapd_bss_deinit_no_free(hapd);
1768                                 hostapd_free_hapd_data(hapd);
1769                         } while (j-- > 0);
1770                         goto fail;
1771                 }
1772                 if (is_zero_ether_addr(hapd->conf->bssid))
1773                         prev_addr = hapd->own_addr;
1774         }
1775         hapd = iface->bss[0];
1776
1777         hostapd_tx_queue_params(iface);
1778
1779         ap_list_init(iface);
1780
1781         hostapd_set_acl(hapd);
1782
1783         if (hostapd_driver_commit(hapd) < 0) {
1784                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1785                            "configuration", __func__);
1786                 goto fail;
1787         }
1788
1789         /*
1790          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1791          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1792          * mode), the interface is up only after driver_commit, so initialize
1793          * WPS after driver_commit.
1794          */
1795         for (j = 0; j < iface->num_bss; j++) {
1796                 if (hostapd_init_wps_complete(iface->bss[j]))
1797                         goto fail;
1798         }
1799
1800         if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
1801             !res_dfs_offload) {
1802                 /*
1803                  * If freq is DFS, and DFS is offloaded to the driver, then wait
1804                  * for CAC to complete.
1805                  */
1806                 wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
1807                 return res_dfs_offload;
1808         }
1809
1810 #ifdef NEED_AP_MLME
1811 dfs_offload:
1812 #endif /* NEED_AP_MLME */
1813
1814 #ifdef CONFIG_FST
1815         if (hapd->iconf->fst_cfg.group_id[0]) {
1816                 struct fst_wpa_obj iface_obj;
1817
1818                 fst_hostapd_fill_iface_obj(hapd, &iface_obj);
1819                 iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
1820                                         &iface_obj, &hapd->iconf->fst_cfg);
1821                 if (!iface->fst) {
1822                         wpa_printf(MSG_ERROR, "Could not attach to FST %s",
1823                                    hapd->iconf->fst_cfg.group_id);
1824                         goto fail;
1825                 }
1826         }
1827 #endif /* CONFIG_FST */
1828
1829         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1830         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1831         if (hapd->setup_complete_cb)
1832                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1833
1834         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1835                    iface->bss[0]->conf->iface);
1836         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1837                 iface->interfaces->terminate_on_error--;
1838
1839         for (j = 0; j < iface->num_bss; j++)
1840                 hostapd_set_own_neighbor_report(iface->bss[j]);
1841
1842         return 0;
1843
1844 fail:
1845         wpa_printf(MSG_ERROR, "Interface initialization failed");
1846         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1847         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1848 #ifdef CONFIG_FST
1849         if (iface->fst) {
1850                 fst_detach(iface->fst);
1851                 iface->fst = NULL;
1852         }
1853 #endif /* CONFIG_FST */
1854         if (iface->interfaces && iface->interfaces->terminate_on_error)
1855                 eloop_terminate();
1856         return -1;
1857 }
1858
1859
1860 /**
1861  * hostapd_setup_interface_complete - Complete interface setup
1862  *
1863  * This function is called when previous steps in the interface setup has been
1864  * completed. This can also start operations, e.g., DFS, that will require
1865  * additional processing before interface is ready to be enabled. Such
1866  * operations will call this function from eloop callbacks when finished.
1867  */
1868 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1869 {
1870         struct hapd_interfaces *interfaces = iface->interfaces;
1871         struct hostapd_data *hapd = iface->bss[0];
1872         unsigned int i;
1873         int not_ready_in_sync_ifaces = 0;
1874
1875         if (!iface->need_to_start_in_sync)
1876                 return hostapd_setup_interface_complete_sync(iface, err);
1877
1878         if (err) {
1879                 wpa_printf(MSG_ERROR, "Interface initialization failed");
1880                 hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1881                 iface->need_to_start_in_sync = 0;
1882                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1883                 if (interfaces && interfaces->terminate_on_error)
1884                         eloop_terminate();
1885                 return -1;
1886         }
1887
1888         if (iface->ready_to_start_in_sync) {
1889                 /* Already in ready and waiting. should never happpen */
1890                 return 0;
1891         }
1892
1893         for (i = 0; i < interfaces->count; i++) {
1894                 if (interfaces->iface[i]->need_to_start_in_sync &&
1895                     !interfaces->iface[i]->ready_to_start_in_sync)
1896                         not_ready_in_sync_ifaces++;
1897         }
1898
1899         /*
1900          * Check if this is the last interface, if yes then start all the other
1901          * waiting interfaces. If not, add this interface to the waiting list.
1902          */
1903         if (not_ready_in_sync_ifaces > 1 && iface->state == HAPD_IFACE_DFS) {
1904                 /*
1905                  * If this interface went through CAC, do not synchronize, just
1906                  * start immediately.
1907                  */
1908                 iface->need_to_start_in_sync = 0;
1909                 wpa_printf(MSG_INFO,
1910                            "%s: Finished CAC - bypass sync and start interface",
1911                            iface->bss[0]->conf->iface);
1912                 return hostapd_setup_interface_complete_sync(iface, err);
1913         }
1914
1915         if (not_ready_in_sync_ifaces > 1) {
1916                 /* need to wait as there are other interfaces still coming up */
1917                 iface->ready_to_start_in_sync = 1;
1918                 wpa_printf(MSG_INFO,
1919                            "%s: Interface waiting to sync with other interfaces",
1920                            iface->bss[0]->conf->iface);
1921                 return 0;
1922         }
1923
1924         wpa_printf(MSG_INFO,
1925                    "%s: Last interface to sync - starting all interfaces",
1926                    iface->bss[0]->conf->iface);
1927         iface->need_to_start_in_sync = 0;
1928         hostapd_setup_interface_complete_sync(iface, err);
1929         for (i = 0; i < interfaces->count; i++) {
1930                 if (interfaces->iface[i]->need_to_start_in_sync &&
1931                     interfaces->iface[i]->ready_to_start_in_sync) {
1932                         hostapd_setup_interface_complete_sync(
1933                                 interfaces->iface[i], 0);
1934                         /* Only once the interfaces are sync started */
1935                         interfaces->iface[i]->need_to_start_in_sync = 0;
1936                 }
1937         }
1938
1939         return 0;
1940 }
1941
1942
1943 /**
1944  * hostapd_setup_interface - Setup of an interface
1945  * @iface: Pointer to interface data.
1946  * Returns: 0 on success, -1 on failure
1947  *
1948  * Initializes the driver interface, validates the configuration,
1949  * and sets driver parameters based on the configuration.
1950  * Flushes old stations, sets the channel, encryption,
1951  * beacons, and WDS links based on the configuration.
1952  *
1953  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1954  * or DFS operations, this function returns 0 before such operations have been
1955  * completed. The pending operations are registered into eloop and will be
1956  * completed from eloop callbacks. Those callbacks end up calling
1957  * hostapd_setup_interface_complete() once setup has been completed.
1958  */
1959 int hostapd_setup_interface(struct hostapd_iface *iface)
1960 {
1961         int ret;
1962
1963         ret = setup_interface(iface);
1964         if (ret) {
1965                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1966                            iface->bss[0]->conf->iface);
1967                 return -1;
1968         }
1969
1970         return 0;
1971 }
1972
1973
1974 /**
1975  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1976  * @hapd_iface: Pointer to interface data
1977  * @conf: Pointer to per-interface configuration
1978  * @bss: Pointer to per-BSS configuration for this BSS
1979  * Returns: Pointer to allocated BSS data
1980  *
1981  * This function is used to allocate per-BSS data structure. This data will be
1982  * freed after hostapd_cleanup() is called for it during interface
1983  * deinitialization.
1984  */
1985 struct hostapd_data *
1986 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1987                        struct hostapd_config *conf,
1988                        struct hostapd_bss_config *bss)
1989 {
1990         struct hostapd_data *hapd;
1991
1992         hapd = os_zalloc(sizeof(*hapd));
1993         if (hapd == NULL)
1994                 return NULL;
1995
1996         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1997         hapd->iconf = conf;
1998         hapd->conf = bss;
1999         hapd->iface = hapd_iface;
2000         hapd->driver = hapd->iconf->driver;
2001         hapd->ctrl_sock = -1;
2002         dl_list_init(&hapd->ctrl_dst);
2003         dl_list_init(&hapd->nr_db);
2004
2005         return hapd;
2006 }
2007
2008
2009 static void hostapd_bss_deinit(struct hostapd_data *hapd)
2010 {
2011         if (!hapd)
2012                 return;
2013         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
2014                    hapd->conf->iface);
2015         hostapd_bss_deinit_no_free(hapd);
2016         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2017         hostapd_cleanup(hapd);
2018 }
2019
2020
2021 void hostapd_interface_deinit(struct hostapd_iface *iface)
2022 {
2023         int j;
2024
2025         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2026         if (iface == NULL)
2027                 return;
2028
2029         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
2030
2031 #ifdef CONFIG_IEEE80211N
2032 #ifdef NEED_AP_MLME
2033         hostapd_stop_setup_timers(iface);
2034         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
2035 #endif /* NEED_AP_MLME */
2036 #endif /* CONFIG_IEEE80211N */
2037         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
2038         iface->wait_channel_update = 0;
2039
2040 #ifdef CONFIG_FST
2041         if (iface->fst) {
2042                 fst_detach(iface->fst);
2043                 iface->fst = NULL;
2044         }
2045 #endif /* CONFIG_FST */
2046
2047         for (j = iface->num_bss - 1; j >= 0; j--) {
2048                 if (!iface->bss)
2049                         break;
2050                 hostapd_bss_deinit(iface->bss[j]);
2051         }
2052 }
2053
2054
2055 void hostapd_interface_free(struct hostapd_iface *iface)
2056 {
2057         size_t j;
2058         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2059         for (j = 0; j < iface->num_bss; j++) {
2060                 if (!iface->bss)
2061                         break;
2062                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
2063                            __func__, iface->bss[j]);
2064                 os_free(iface->bss[j]);
2065         }
2066         hostapd_cleanup_iface(iface);
2067 }
2068
2069
2070 struct hostapd_iface * hostapd_alloc_iface(void)
2071 {
2072         struct hostapd_iface *hapd_iface;
2073
2074         hapd_iface = os_zalloc(sizeof(*hapd_iface));
2075         if (!hapd_iface)
2076                 return NULL;
2077
2078         dl_list_init(&hapd_iface->sta_seen);
2079
2080         return hapd_iface;
2081 }
2082
2083
2084 /**
2085  * hostapd_init - Allocate and initialize per-interface data
2086  * @config_file: Path to the configuration file
2087  * Returns: Pointer to the allocated interface data or %NULL on failure
2088  *
2089  * This function is used to allocate main data structures for per-interface
2090  * data. The allocated data buffer will be freed by calling
2091  * hostapd_cleanup_iface().
2092  */
2093 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
2094                                     const char *config_file)
2095 {
2096         struct hostapd_iface *hapd_iface = NULL;
2097         struct hostapd_config *conf = NULL;
2098         struct hostapd_data *hapd;
2099         size_t i;
2100
2101         hapd_iface = hostapd_alloc_iface();
2102         if (hapd_iface == NULL)
2103                 goto fail;
2104
2105         hapd_iface->config_fname = os_strdup(config_file);
2106         if (hapd_iface->config_fname == NULL)
2107                 goto fail;
2108
2109         conf = interfaces->config_read_cb(hapd_iface->config_fname);
2110         if (conf == NULL)
2111                 goto fail;
2112         hapd_iface->conf = conf;
2113
2114         hapd_iface->num_bss = conf->num_bss;
2115         hapd_iface->bss = os_calloc(conf->num_bss,
2116                                     sizeof(struct hostapd_data *));
2117         if (hapd_iface->bss == NULL)
2118                 goto fail;
2119
2120         for (i = 0; i < conf->num_bss; i++) {
2121                 hapd = hapd_iface->bss[i] =
2122                         hostapd_alloc_bss_data(hapd_iface, conf,
2123                                                conf->bss[i]);
2124                 if (hapd == NULL)
2125                         goto fail;
2126                 hapd->msg_ctx = hapd;
2127         }
2128
2129         return hapd_iface;
2130
2131 fail:
2132         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
2133                    config_file);
2134         if (conf)
2135                 hostapd_config_free(conf);
2136         if (hapd_iface) {
2137                 os_free(hapd_iface->config_fname);
2138                 os_free(hapd_iface->bss);
2139                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
2140                            __func__, hapd_iface);
2141                 os_free(hapd_iface);
2142         }
2143         return NULL;
2144 }
2145
2146
2147 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
2148 {
2149         size_t i, j;
2150
2151         for (i = 0; i < interfaces->count; i++) {
2152                 struct hostapd_iface *iface = interfaces->iface[i];
2153                 for (j = 0; j < iface->num_bss; j++) {
2154                         struct hostapd_data *hapd = iface->bss[j];
2155                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
2156                                 return 1;
2157                 }
2158         }
2159
2160         return 0;
2161 }
2162
2163
2164 /**
2165  * hostapd_interface_init_bss - Read configuration file and init BSS data
2166  *
2167  * This function is used to parse configuration file for a BSS. This BSS is
2168  * added to an existing interface sharing the same radio (if any) or a new
2169  * interface is created if this is the first interface on a radio. This
2170  * allocate memory for the BSS. No actual driver operations are started.
2171  *
2172  * This is similar to hostapd_interface_init(), but for a case where the
2173  * configuration is used to add a single BSS instead of all BSSes for a radio.
2174  */
2175 struct hostapd_iface *
2176 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
2177                            const char *config_fname, int debug)
2178 {
2179         struct hostapd_iface *new_iface = NULL, *iface = NULL;
2180         struct hostapd_data *hapd;
2181         int k;
2182         size_t i, bss_idx;
2183
2184         if (!phy || !*phy)
2185                 return NULL;
2186
2187         for (i = 0; i < interfaces->count; i++) {
2188                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
2189                         iface = interfaces->iface[i];
2190                         break;
2191                 }
2192         }
2193
2194         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
2195                    config_fname, phy, iface ? "" : " --> new PHY");
2196         if (iface) {
2197                 struct hostapd_config *conf;
2198                 struct hostapd_bss_config **tmp_conf;
2199                 struct hostapd_data **tmp_bss;
2200                 struct hostapd_bss_config *bss;
2201                 const char *ifname;
2202
2203                 /* Add new BSS to existing iface */
2204                 conf = interfaces->config_read_cb(config_fname);
2205                 if (conf == NULL)
2206                         return NULL;
2207                 if (conf->num_bss > 1) {
2208                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
2209                         hostapd_config_free(conf);
2210                         return NULL;
2211                 }
2212
2213                 ifname = conf->bss[0]->iface;
2214                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
2215                         wpa_printf(MSG_ERROR,
2216                                    "Interface name %s already in use", ifname);
2217                         hostapd_config_free(conf);
2218                         return NULL;
2219                 }
2220
2221                 tmp_conf = os_realloc_array(
2222                         iface->conf->bss, iface->conf->num_bss + 1,
2223                         sizeof(struct hostapd_bss_config *));
2224                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
2225                                            sizeof(struct hostapd_data *));
2226                 if (tmp_bss)
2227                         iface->bss = tmp_bss;
2228                 if (tmp_conf) {
2229                         iface->conf->bss = tmp_conf;
2230                         iface->conf->last_bss = tmp_conf[0];
2231                 }
2232                 if (tmp_bss == NULL || tmp_conf == NULL) {
2233                         hostapd_config_free(conf);
2234                         return NULL;
2235                 }
2236                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
2237                 iface->conf->num_bss++;
2238
2239                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
2240                 if (hapd == NULL) {
2241                         iface->conf->num_bss--;
2242                         hostapd_config_free(conf);
2243                         return NULL;
2244                 }
2245                 iface->conf->last_bss = bss;
2246                 iface->bss[iface->num_bss] = hapd;
2247                 hapd->msg_ctx = hapd;
2248
2249                 bss_idx = iface->num_bss++;
2250                 conf->num_bss--;
2251                 conf->bss[0] = NULL;
2252                 hostapd_config_free(conf);
2253         } else {
2254                 /* Add a new iface with the first BSS */
2255                 new_iface = iface = hostapd_init(interfaces, config_fname);
2256                 if (!iface)
2257                         return NULL;
2258                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
2259                 iface->interfaces = interfaces;
2260                 bss_idx = 0;
2261         }
2262
2263         for (k = 0; k < debug; k++) {
2264                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
2265                         iface->bss[bss_idx]->conf->logger_stdout_level--;
2266         }
2267
2268         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
2269             !hostapd_drv_none(iface->bss[bss_idx])) {
2270                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
2271                            config_fname);
2272                 if (new_iface)
2273                         hostapd_interface_deinit_free(new_iface);
2274                 return NULL;
2275         }
2276
2277         return iface;
2278 }
2279
2280
2281 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
2282 {
2283         const struct wpa_driver_ops *driver;
2284         void *drv_priv;
2285
2286         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2287         if (iface == NULL)
2288                 return;
2289         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
2290                    __func__, (unsigned int) iface->num_bss,
2291                    (unsigned int) iface->conf->num_bss);
2292         driver = iface->bss[0]->driver;
2293         drv_priv = iface->bss[0]->drv_priv;
2294         hostapd_interface_deinit(iface);
2295         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2296                    __func__, driver, drv_priv);
2297         if (driver && driver->hapd_deinit && drv_priv) {
2298                 driver->hapd_deinit(drv_priv);
2299                 iface->bss[0]->drv_priv = NULL;
2300         }
2301         hostapd_interface_free(iface);
2302 }
2303
2304
2305 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
2306                                   void *drv_priv,
2307                                   struct hostapd_iface *hapd_iface)
2308 {
2309         size_t j;
2310
2311         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2312                    __func__, driver, drv_priv);
2313         if (driver && driver->hapd_deinit && drv_priv) {
2314                 driver->hapd_deinit(drv_priv);
2315                 for (j = 0; j < hapd_iface->num_bss; j++) {
2316                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
2317                                    __func__, (int) j,
2318                                    hapd_iface->bss[j]->drv_priv);
2319                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
2320                                 hapd_iface->bss[j]->drv_priv = NULL;
2321                 }
2322         }
2323 }
2324
2325
2326 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
2327 {
2328         size_t j;
2329
2330         if (hapd_iface->bss[0]->drv_priv != NULL) {
2331                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
2332                            hapd_iface->conf->bss[0]->iface);
2333                 return -1;
2334         }
2335
2336         wpa_printf(MSG_DEBUG, "Enable interface %s",
2337                    hapd_iface->conf->bss[0]->iface);
2338
2339         for (j = 0; j < hapd_iface->num_bss; j++)
2340                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2341         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2342                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
2343                 return -1;
2344         }
2345
2346         if (hapd_iface->interfaces == NULL ||
2347             hapd_iface->interfaces->driver_init == NULL ||
2348             hapd_iface->interfaces->driver_init(hapd_iface))
2349                 return -1;
2350
2351         if (hostapd_setup_interface(hapd_iface)) {
2352                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
2353                                       hapd_iface->bss[0]->drv_priv,
2354                                       hapd_iface);
2355                 return -1;
2356         }
2357
2358         return 0;
2359 }
2360
2361
2362 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
2363 {
2364         size_t j;
2365
2366         wpa_printf(MSG_DEBUG, "Reload interface %s",
2367                    hapd_iface->conf->bss[0]->iface);
2368         for (j = 0; j < hapd_iface->num_bss; j++)
2369                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2370         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2371                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
2372                 return -1;
2373         }
2374         hostapd_clear_old(hapd_iface);
2375         for (j = 0; j < hapd_iface->num_bss; j++)
2376                 hostapd_reload_bss(hapd_iface->bss[j]);
2377
2378         return 0;
2379 }
2380
2381
2382 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
2383 {
2384         size_t j;
2385         const struct wpa_driver_ops *driver;
2386         void *drv_priv;
2387
2388         if (hapd_iface == NULL)
2389                 return -1;
2390
2391         if (hapd_iface->bss[0]->drv_priv == NULL) {
2392                 wpa_printf(MSG_INFO, "Interface %s already disabled",
2393                            hapd_iface->conf->bss[0]->iface);
2394                 return -1;
2395         }
2396
2397         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2398         driver = hapd_iface->bss[0]->driver;
2399         drv_priv = hapd_iface->bss[0]->drv_priv;
2400
2401         hapd_iface->driver_ap_teardown =
2402                 !!(hapd_iface->drv_flags &
2403                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2404
2405         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
2406         for (j = 0; j < hapd_iface->num_bss; j++) {
2407                 struct hostapd_data *hapd = hapd_iface->bss[j];
2408                 hostapd_bss_deinit_no_free(hapd);
2409                 hostapd_free_hapd_data(hapd);
2410         }
2411
2412         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
2413
2414         /* From hostapd_cleanup_iface: These were initialized in
2415          * hostapd_setup_interface and hostapd_setup_interface_complete
2416          */
2417         hostapd_cleanup_iface_partial(hapd_iface);
2418
2419         wpa_printf(MSG_DEBUG, "Interface %s disabled",
2420                    hapd_iface->bss[0]->conf->iface);
2421         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
2422         return 0;
2423 }
2424
2425
2426 static struct hostapd_iface *
2427 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
2428 {
2429         struct hostapd_iface **iface, *hapd_iface;
2430
2431         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
2432                                  sizeof(struct hostapd_iface *));
2433         if (iface == NULL)
2434                 return NULL;
2435         interfaces->iface = iface;
2436         hapd_iface = interfaces->iface[interfaces->count] =
2437                 hostapd_alloc_iface();
2438         if (hapd_iface == NULL) {
2439                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2440                            "the interface", __func__);
2441                 return NULL;
2442         }
2443         interfaces->count++;
2444         hapd_iface->interfaces = interfaces;
2445
2446         return hapd_iface;
2447 }
2448
2449
2450 static struct hostapd_config *
2451 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
2452                      const char *ctrl_iface, const char *driver)
2453 {
2454         struct hostapd_bss_config *bss;
2455         struct hostapd_config *conf;
2456
2457         /* Allocates memory for bss and conf */
2458         conf = hostapd_config_defaults();
2459         if (conf == NULL) {
2460                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2461                                 "configuration", __func__);
2462                 return NULL;
2463         }
2464
2465         if (driver) {
2466                 int j;
2467
2468                 for (j = 0; wpa_drivers[j]; j++) {
2469                         if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
2470                                 conf->driver = wpa_drivers[j];
2471                                 goto skip;
2472                         }
2473                 }
2474
2475                 wpa_printf(MSG_ERROR,
2476                            "Invalid/unknown driver '%s' - registering the default driver",
2477                            driver);
2478         }
2479
2480         conf->driver = wpa_drivers[0];
2481         if (conf->driver == NULL) {
2482                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
2483                 hostapd_config_free(conf);
2484                 return NULL;
2485         }
2486
2487 skip:
2488         bss = conf->last_bss = conf->bss[0];
2489
2490         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
2491         bss->ctrl_interface = os_strdup(ctrl_iface);
2492         if (bss->ctrl_interface == NULL) {
2493                 hostapd_config_free(conf);
2494                 return NULL;
2495         }
2496
2497         /* Reading configuration file skipped, will be done in SET!
2498          * From reading the configuration till the end has to be done in
2499          * SET
2500          */
2501         return conf;
2502 }
2503
2504
2505 static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
2506                               struct hostapd_config *conf)
2507 {
2508         size_t i;
2509         struct hostapd_data *hapd;
2510
2511         hapd_iface->bss = os_calloc(conf->num_bss,
2512                                     sizeof(struct hostapd_data *));
2513         if (hapd_iface->bss == NULL)
2514                 return -1;
2515
2516         for (i = 0; i < conf->num_bss; i++) {
2517                 hapd = hapd_iface->bss[i] =
2518                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
2519                 if (hapd == NULL) {
2520                         while (i > 0) {
2521                                 i--;
2522                                 os_free(hapd_iface->bss[i]);
2523                                 hapd_iface->bss[i] = NULL;
2524                         }
2525                         os_free(hapd_iface->bss);
2526                         hapd_iface->bss = NULL;
2527                         return -1;
2528                 }
2529                 hapd->msg_ctx = hapd;
2530         }
2531
2532         hapd_iface->conf = conf;
2533         hapd_iface->num_bss = conf->num_bss;
2534
2535         return 0;
2536 }
2537
2538
2539 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
2540 {
2541         struct hostapd_config *conf = NULL;
2542         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
2543         struct hostapd_data *hapd;
2544         char *ptr;
2545         size_t i, j;
2546         const char *conf_file = NULL, *phy_name = NULL;
2547
2548         if (os_strncmp(buf, "bss_config=", 11) == 0) {
2549                 char *pos;
2550                 phy_name = buf + 11;
2551                 pos = os_strchr(phy_name, ':');
2552                 if (!pos)
2553                         return -1;
2554                 *pos++ = '\0';
2555                 conf_file = pos;
2556                 if (!os_strlen(conf_file))
2557                         return -1;
2558
2559                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
2560                                                         conf_file, 0);
2561                 if (!hapd_iface)
2562                         return -1;
2563                 for (j = 0; j < interfaces->count; j++) {
2564                         if (interfaces->iface[j] == hapd_iface)
2565                                 break;
2566                 }
2567                 if (j == interfaces->count) {
2568                         struct hostapd_iface **tmp;
2569                         tmp = os_realloc_array(interfaces->iface,
2570                                                interfaces->count + 1,
2571                                                sizeof(struct hostapd_iface *));
2572                         if (!tmp) {
2573                                 hostapd_interface_deinit_free(hapd_iface);
2574                                 return -1;
2575                         }
2576                         interfaces->iface = tmp;
2577                         interfaces->iface[interfaces->count++] = hapd_iface;
2578                         new_iface = hapd_iface;
2579                 }
2580
2581                 if (new_iface) {
2582                         if (interfaces->driver_init(hapd_iface))
2583                                 goto fail;
2584
2585                         if (hostapd_setup_interface(hapd_iface)) {
2586                                 hostapd_deinit_driver(
2587                                         hapd_iface->bss[0]->driver,
2588                                         hapd_iface->bss[0]->drv_priv,
2589                                         hapd_iface);
2590                                 goto fail;
2591                         }
2592                 } else {
2593                         /* Assign new BSS with bss[0]'s driver info */
2594                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
2595                         hapd->driver = hapd_iface->bss[0]->driver;
2596                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
2597                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
2598                                   ETH_ALEN);
2599
2600                         if (start_ctrl_iface_bss(hapd) < 0 ||
2601                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
2602                              hostapd_setup_bss(hapd, -1))) {
2603                                 hostapd_cleanup(hapd);
2604                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
2605                                 hapd_iface->conf->num_bss--;
2606                                 hapd_iface->num_bss--;
2607                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
2608                                            __func__, hapd, hapd->conf->iface);
2609                                 hostapd_config_free_bss(hapd->conf);
2610                                 hapd->conf = NULL;
2611                                 os_free(hapd);
2612                                 return -1;
2613                         }
2614                 }
2615                 return 0;
2616         }
2617
2618         ptr = os_strchr(buf, ' ');
2619         if (ptr == NULL)
2620                 return -1;
2621         *ptr++ = '\0';
2622
2623         if (os_strncmp(ptr, "config=", 7) == 0)
2624                 conf_file = ptr + 7;
2625
2626         for (i = 0; i < interfaces->count; i++) {
2627                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
2628                                buf)) {
2629                         wpa_printf(MSG_INFO, "Cannot add interface - it "
2630                                    "already exists");
2631                         return -1;
2632                 }
2633         }
2634
2635         hapd_iface = hostapd_iface_alloc(interfaces);
2636         if (hapd_iface == NULL) {
2637                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2638                            "for interface", __func__);
2639                 goto fail;
2640         }
2641         new_iface = hapd_iface;
2642
2643         if (conf_file && interfaces->config_read_cb) {
2644                 conf = interfaces->config_read_cb(conf_file);
2645                 if (conf && conf->bss)
2646                         os_strlcpy(conf->bss[0]->iface, buf,
2647                                    sizeof(conf->bss[0]->iface));
2648         } else {
2649                 char *driver = os_strchr(ptr, ' ');
2650
2651                 if (driver)
2652                         *driver++ = '\0';
2653                 conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
2654         }
2655
2656         if (conf == NULL || conf->bss == NULL) {
2657                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2658                            "for configuration", __func__);
2659                 goto fail;
2660         }
2661
2662         if (hostapd_data_alloc(hapd_iface, conf) < 0) {
2663                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2664                            "for hostapd", __func__);
2665                 goto fail;
2666         }
2667         conf = NULL;
2668
2669         if (start_ctrl_iface(hapd_iface) < 0)
2670                 goto fail;
2671
2672         wpa_printf(MSG_INFO, "Add interface '%s'",
2673                    hapd_iface->conf->bss[0]->iface);
2674
2675         return 0;
2676
2677 fail:
2678         if (conf)
2679                 hostapd_config_free(conf);
2680         if (hapd_iface) {
2681                 if (hapd_iface->bss) {
2682                         for (i = 0; i < hapd_iface->num_bss; i++) {
2683                                 hapd = hapd_iface->bss[i];
2684                                 if (!hapd)
2685                                         continue;
2686                                 if (hapd_iface->interfaces &&
2687                                     hapd_iface->interfaces->ctrl_iface_deinit)
2688                                         hapd_iface->interfaces->
2689                                                 ctrl_iface_deinit(hapd);
2690                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2691                                            __func__, hapd_iface->bss[i],
2692                                            hapd->conf->iface);
2693                                 hostapd_cleanup(hapd);
2694                                 os_free(hapd);
2695                                 hapd_iface->bss[i] = NULL;
2696                         }
2697                         os_free(hapd_iface->bss);
2698                         hapd_iface->bss = NULL;
2699                 }
2700                 if (new_iface) {
2701                         interfaces->count--;
2702                         interfaces->iface[interfaces->count] = NULL;
2703                 }
2704                 hostapd_cleanup_iface(hapd_iface);
2705         }
2706         return -1;
2707 }
2708
2709
2710 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
2711 {
2712         size_t i;
2713
2714         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
2715
2716         /* Remove hostapd_data only if it has already been initialized */
2717         if (idx < iface->num_bss) {
2718                 struct hostapd_data *hapd = iface->bss[idx];
2719
2720                 hostapd_bss_deinit(hapd);
2721                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2722                            __func__, hapd, hapd->conf->iface);
2723                 hostapd_config_free_bss(hapd->conf);
2724                 hapd->conf = NULL;
2725                 os_free(hapd);
2726
2727                 iface->num_bss--;
2728
2729                 for (i = idx; i < iface->num_bss; i++)
2730                         iface->bss[i] = iface->bss[i + 1];
2731         } else {
2732                 hostapd_config_free_bss(iface->conf->bss[idx]);
2733                 iface->conf->bss[idx] = NULL;
2734         }
2735
2736         iface->conf->num_bss--;
2737         for (i = idx; i < iface->conf->num_bss; i++)
2738                 iface->conf->bss[i] = iface->conf->bss[i + 1];
2739
2740         return 0;
2741 }
2742
2743
2744 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2745 {
2746         struct hostapd_iface *hapd_iface;
2747         size_t i, j, k = 0;
2748
2749         for (i = 0; i < interfaces->count; i++) {
2750                 hapd_iface = interfaces->iface[i];
2751                 if (hapd_iface == NULL)
2752                         return -1;
2753                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2754                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2755                         hapd_iface->driver_ap_teardown =
2756                                 !!(hapd_iface->drv_flags &
2757                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2758
2759                         hostapd_interface_deinit_free(hapd_iface);
2760                         k = i;
2761                         while (k < (interfaces->count - 1)) {
2762                                 interfaces->iface[k] =
2763                                         interfaces->iface[k + 1];
2764                                 k++;
2765                         }
2766                         interfaces->count--;
2767                         return 0;
2768                 }
2769
2770                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2771                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2772                                 hapd_iface->driver_ap_teardown =
2773                                         !(hapd_iface->drv_flags &
2774                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2775                                 return hostapd_remove_bss(hapd_iface, j);
2776                         }
2777                 }
2778         }
2779         return -1;
2780 }
2781
2782
2783 /**
2784  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2785  * @hapd: Pointer to BSS data
2786  * @sta: Pointer to the associated STA data
2787  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2788  *
2789  * This function will be called whenever a station associates with the AP. It
2790  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2791  * from drv_callbacks.c based on driver events for drivers that take care of
2792  * management frames (IEEE 802.11 authentication and association) internally.
2793  */
2794 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2795                            int reassoc)
2796 {
2797         if (hapd->tkip_countermeasures) {
2798                 hostapd_drv_sta_deauth(hapd, sta->addr,
2799                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2800                 return;
2801         }
2802
2803         hostapd_prune_associations(hapd, sta->addr);
2804         ap_sta_clear_disconnect_timeouts(hapd, sta);
2805
2806         /* IEEE 802.11F (IAPP) */
2807         if (hapd->conf->ieee802_11f)
2808                 iapp_new_station(hapd->iapp, sta);
2809
2810 #ifdef CONFIG_P2P
2811         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2812                 sta->no_p2p_set = 1;
2813                 hapd->num_sta_no_p2p++;
2814                 if (hapd->num_sta_no_p2p == 1)
2815                         hostapd_p2p_non_p2p_sta_connected(hapd);
2816         }
2817 #endif /* CONFIG_P2P */
2818
2819         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2820          * IEEE 802.1X/WPA code will start accounting after the station has
2821          * been authorized. */
2822         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2823                 ap_sta_set_authorized(hapd, sta, 1);
2824                 os_get_reltime(&sta->connected_time);
2825                 accounting_sta_start(hapd, sta);
2826         }
2827
2828         /* Start IEEE 802.1X authentication process for new stations */
2829         ieee802_1x_new_station(hapd, sta);
2830         if (reassoc) {
2831                 if (sta->auth_alg != WLAN_AUTH_FT &&
2832                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2833                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2834         } else
2835                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2836
2837         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2838                 wpa_printf(MSG_DEBUG,
2839                            "%s: %s: reschedule ap_handle_timer timeout for "
2840                            MACSTR " (%d seconds - ap_max_inactivity)",
2841                            hapd->conf->iface, __func__, MAC2STR(sta->addr),
2842                            hapd->conf->ap_max_inactivity);
2843                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2844                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2845                                        ap_handle_timer, hapd, sta);
2846         }
2847 }
2848
2849
2850 const char * hostapd_state_text(enum hostapd_iface_state s)
2851 {
2852         switch (s) {
2853         case HAPD_IFACE_UNINITIALIZED:
2854                 return "UNINITIALIZED";
2855         case HAPD_IFACE_DISABLED:
2856                 return "DISABLED";
2857         case HAPD_IFACE_COUNTRY_UPDATE:
2858                 return "COUNTRY_UPDATE";
2859         case HAPD_IFACE_ACS:
2860                 return "ACS";
2861         case HAPD_IFACE_HT_SCAN:
2862                 return "HT_SCAN";
2863         case HAPD_IFACE_DFS:
2864                 return "DFS";
2865         case HAPD_IFACE_ENABLED:
2866                 return "ENABLED";
2867         }
2868
2869         return "UNKNOWN";
2870 }
2871
2872
2873 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2874 {
2875         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2876                    iface->conf ? iface->conf->bss[0]->iface : "N/A",
2877                    hostapd_state_text(iface->state), hostapd_state_text(s));
2878         iface->state = s;
2879 }
2880
2881
2882 int hostapd_csa_in_progress(struct hostapd_iface *iface)
2883 {
2884         unsigned int i;
2885
2886         for (i = 0; i < iface->num_bss; i++)
2887                 if (iface->bss[i]->csa_in_progress)
2888                         return 1;
2889         return 0;
2890 }
2891
2892
2893 #ifdef NEED_AP_MLME
2894
2895 static void free_beacon_data(struct beacon_data *beacon)
2896 {
2897         os_free(beacon->head);
2898         beacon->head = NULL;
2899         os_free(beacon->tail);
2900         beacon->tail = NULL;
2901         os_free(beacon->probe_resp);
2902         beacon->probe_resp = NULL;
2903         os_free(beacon->beacon_ies);
2904         beacon->beacon_ies = NULL;
2905         os_free(beacon->proberesp_ies);
2906         beacon->proberesp_ies = NULL;
2907         os_free(beacon->assocresp_ies);
2908         beacon->assocresp_ies = NULL;
2909 }
2910
2911
2912 static int hostapd_build_beacon_data(struct hostapd_data *hapd,
2913                                      struct beacon_data *beacon)
2914 {
2915         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2916         struct wpa_driver_ap_params params;
2917         int ret;
2918
2919         os_memset(beacon, 0, sizeof(*beacon));
2920         ret = ieee802_11_build_ap_params(hapd, &params);
2921         if (ret < 0)
2922                 return ret;
2923
2924         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2925                                          &proberesp_extra,
2926                                          &assocresp_extra);
2927         if (ret)
2928                 goto free_ap_params;
2929
2930         ret = -1;
2931         beacon->head = os_malloc(params.head_len);
2932         if (!beacon->head)
2933                 goto free_ap_extra_ies;
2934
2935         os_memcpy(beacon->head, params.head, params.head_len);
2936         beacon->head_len = params.head_len;
2937
2938         beacon->tail = os_malloc(params.tail_len);
2939         if (!beacon->tail)
2940                 goto free_beacon;
2941
2942         os_memcpy(beacon->tail, params.tail, params.tail_len);
2943         beacon->tail_len = params.tail_len;
2944
2945         if (params.proberesp != NULL) {
2946                 beacon->probe_resp = os_malloc(params.proberesp_len);
2947                 if (!beacon->probe_resp)
2948                         goto free_beacon;
2949
2950                 os_memcpy(beacon->probe_resp, params.proberesp,
2951                           params.proberesp_len);
2952                 beacon->probe_resp_len = params.proberesp_len;
2953         }
2954
2955         /* copy the extra ies */
2956         if (beacon_extra) {
2957                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2958                 if (!beacon->beacon_ies)
2959                         goto free_beacon;
2960
2961                 os_memcpy(beacon->beacon_ies,
2962                           beacon_extra->buf, wpabuf_len(beacon_extra));
2963                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2964         }
2965
2966         if (proberesp_extra) {
2967                 beacon->proberesp_ies =
2968                         os_malloc(wpabuf_len(proberesp_extra));
2969                 if (!beacon->proberesp_ies)
2970                         goto free_beacon;
2971
2972                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2973                           wpabuf_len(proberesp_extra));
2974                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2975         }
2976
2977         if (assocresp_extra) {
2978                 beacon->assocresp_ies =
2979                         os_malloc(wpabuf_len(assocresp_extra));
2980                 if (!beacon->assocresp_ies)
2981                         goto free_beacon;
2982
2983                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2984                           wpabuf_len(assocresp_extra));
2985                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2986         }
2987
2988         ret = 0;
2989 free_beacon:
2990         /* if the function fails, the caller should not free beacon data */
2991         if (ret)
2992                 free_beacon_data(beacon);
2993
2994 free_ap_extra_ies:
2995         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2996                                   assocresp_extra);
2997 free_ap_params:
2998         ieee802_11_free_ap_params(&params);
2999         return ret;
3000 }
3001
3002
3003 /*
3004  * TODO: This flow currently supports only changing channel and width within
3005  * the same hw_mode. Any other changes to MAC parameters or provided settings
3006  * are not supported.
3007  */
3008 static int hostapd_change_config_freq(struct hostapd_data *hapd,
3009                                       struct hostapd_config *conf,
3010                                       struct hostapd_freq_params *params,
3011                                       struct hostapd_freq_params *old_params)
3012 {
3013         int channel;
3014
3015         if (!params->channel) {
3016                 /* check if the new channel is supported by hw */
3017                 params->channel = hostapd_hw_get_channel(hapd, params->freq);
3018         }
3019
3020         channel = params->channel;
3021         if (!channel)
3022                 return -1;
3023
3024         /* if a pointer to old_params is provided we save previous state */
3025         if (old_params &&
3026             hostapd_set_freq_params(old_params, conf->hw_mode,
3027                                     hostapd_hw_get_freq(hapd, conf->channel),
3028                                     conf->channel, conf->ieee80211n,
3029                                     conf->ieee80211ac,
3030                                     conf->secondary_channel,
3031                                     conf->vht_oper_chwidth,
3032                                     conf->vht_oper_centr_freq_seg0_idx,
3033                                     conf->vht_oper_centr_freq_seg1_idx,
3034                                     conf->vht_capab))
3035                 return -1;
3036
3037         switch (params->bandwidth) {
3038         case 0:
3039         case 20:
3040         case 40:
3041                 conf->vht_oper_chwidth = VHT_CHANWIDTH_USE_HT;
3042                 break;
3043         case 80:
3044                 if (params->center_freq2)
3045                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80P80MHZ;
3046                 else
3047                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80MHZ;
3048                 break;
3049         case 160:
3050                 conf->vht_oper_chwidth = VHT_CHANWIDTH_160MHZ;
3051                 break;
3052         default:
3053                 return -1;
3054         }
3055
3056         conf->channel = channel;
3057         conf->ieee80211n = params->ht_enabled;
3058         conf->secondary_channel = params->sec_channel_offset;
3059         ieee80211_freq_to_chan(params->center_freq1,
3060                                &conf->vht_oper_centr_freq_seg0_idx);
3061         ieee80211_freq_to_chan(params->center_freq2,
3062                                &conf->vht_oper_centr_freq_seg1_idx);
3063
3064         /* TODO: maybe call here hostapd_config_check here? */
3065
3066         return 0;
3067 }
3068
3069
3070 static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
3071                                      struct csa_settings *settings)
3072 {
3073         struct hostapd_iface *iface = hapd->iface;
3074         struct hostapd_freq_params old_freq;
3075         int ret;
3076         u8 chan, vht_bandwidth;
3077
3078         os_memset(&old_freq, 0, sizeof(old_freq));
3079         if (!iface || !iface->freq || hapd->csa_in_progress)
3080                 return -1;
3081
3082         switch (settings->freq_params.bandwidth) {
3083         case 80:
3084                 if (settings->freq_params.center_freq2)
3085                         vht_bandwidth = VHT_CHANWIDTH_80P80MHZ;
3086                 else
3087                         vht_bandwidth = VHT_CHANWIDTH_80MHZ;
3088                 break;
3089         case 160:
3090                 vht_bandwidth = VHT_CHANWIDTH_160MHZ;
3091                 break;
3092         default:
3093                 vht_bandwidth = VHT_CHANWIDTH_USE_HT;
3094                 break;
3095         }
3096
3097         if (ieee80211_freq_to_channel_ext(
3098                     settings->freq_params.freq,
3099                     settings->freq_params.sec_channel_offset,
3100                     vht_bandwidth,
3101                     &hapd->iface->cs_oper_class,
3102                     &chan) == NUM_HOSTAPD_MODES) {
3103                 wpa_printf(MSG_DEBUG,
3104                            "invalid frequency for channel switch (freq=%d, sec_channel_offset=%d, vht_enabled=%d)",
3105                            settings->freq_params.freq,
3106                            settings->freq_params.sec_channel_offset,
3107                            settings->freq_params.vht_enabled);
3108                 return -1;
3109         }
3110
3111         settings->freq_params.channel = chan;
3112
3113         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
3114                                          &settings->freq_params,
3115                                          &old_freq);
3116         if (ret)
3117                 return ret;
3118
3119         ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
3120
3121         /* change back the configuration */
3122         hostapd_change_config_freq(iface->bss[0], iface->conf,
3123                                    &old_freq, NULL);
3124
3125         if (ret)
3126                 return ret;
3127
3128         /* set channel switch parameters for csa ie */
3129         hapd->cs_freq_params = settings->freq_params;
3130         hapd->cs_count = settings->cs_count;
3131         hapd->cs_block_tx = settings->block_tx;
3132
3133         ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
3134         if (ret) {
3135                 free_beacon_data(&settings->beacon_after);
3136                 return ret;
3137         }
3138
3139         settings->counter_offset_beacon[0] = hapd->cs_c_off_beacon;
3140         settings->counter_offset_presp[0] = hapd->cs_c_off_proberesp;
3141         settings->counter_offset_beacon[1] = hapd->cs_c_off_ecsa_beacon;
3142         settings->counter_offset_presp[1] = hapd->cs_c_off_ecsa_proberesp;
3143
3144         return 0;
3145 }
3146
3147
3148 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
3149 {
3150         os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
3151         hapd->cs_count = 0;
3152         hapd->cs_block_tx = 0;
3153         hapd->cs_c_off_beacon = 0;
3154         hapd->cs_c_off_proberesp = 0;
3155         hapd->csa_in_progress = 0;
3156         hapd->cs_c_off_ecsa_beacon = 0;
3157         hapd->cs_c_off_ecsa_proberesp = 0;
3158 }
3159
3160
3161 int hostapd_switch_channel(struct hostapd_data *hapd,
3162                            struct csa_settings *settings)
3163 {
3164         int ret;
3165
3166         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
3167                 wpa_printf(MSG_INFO, "CSA is not supported");
3168                 return -1;
3169         }
3170
3171         ret = hostapd_fill_csa_settings(hapd, settings);
3172         if (ret)
3173                 return ret;
3174
3175         ret = hostapd_drv_switch_channel(hapd, settings);
3176         free_beacon_data(&settings->beacon_csa);
3177         free_beacon_data(&settings->beacon_after);
3178
3179         if (ret) {
3180                 /* if we failed, clean cs parameters */
3181                 hostapd_cleanup_cs_params(hapd);
3182                 return ret;
3183         }
3184
3185         hapd->csa_in_progress = 1;
3186         return 0;
3187 }
3188
3189
3190 void
3191 hostapd_switch_channel_fallback(struct hostapd_iface *iface,
3192                                 const struct hostapd_freq_params *freq_params)
3193 {
3194         int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
3195         unsigned int i;
3196
3197         wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
3198
3199         if (freq_params->center_freq1)
3200                 vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
3201         if (freq_params->center_freq2)
3202                 vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
3203
3204         switch (freq_params->bandwidth) {
3205         case 0:
3206         case 20:
3207         case 40:
3208                 vht_bw = VHT_CHANWIDTH_USE_HT;
3209                 break;
3210         case 80:
3211                 if (freq_params->center_freq2)
3212                         vht_bw = VHT_CHANWIDTH_80P80MHZ;
3213                 else
3214                         vht_bw = VHT_CHANWIDTH_80MHZ;
3215                 break;
3216         case 160:
3217                 vht_bw = VHT_CHANWIDTH_160MHZ;
3218                 break;
3219         default:
3220                 wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
3221                            freq_params->bandwidth);
3222                 break;
3223         }
3224
3225         iface->freq = freq_params->freq;
3226         iface->conf->channel = freq_params->channel;
3227         iface->conf->secondary_channel = freq_params->sec_channel_offset;
3228         iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
3229         iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
3230         iface->conf->vht_oper_chwidth = vht_bw;
3231         iface->conf->ieee80211n = freq_params->ht_enabled;
3232         iface->conf->ieee80211ac = freq_params->vht_enabled;
3233
3234         /*
3235          * cs_params must not be cleared earlier because the freq_params
3236          * argument may actually point to one of these.
3237          */
3238         for (i = 0; i < iface->num_bss; i++)
3239                 hostapd_cleanup_cs_params(iface->bss[i]);
3240
3241         hostapd_disable_iface(iface);
3242         hostapd_enable_iface(iface);
3243 }
3244
3245 #endif /* NEED_AP_MLME */
3246
3247
3248 struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
3249                                         const char *ifname)
3250 {
3251         size_t i, j;
3252
3253         for (i = 0; i < interfaces->count; i++) {
3254                 struct hostapd_iface *iface = interfaces->iface[i];
3255
3256                 for (j = 0; j < iface->num_bss; j++) {
3257                         struct hostapd_data *hapd = iface->bss[j];
3258
3259                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
3260                                 return hapd;
3261                 }
3262         }
3263
3264         return NULL;
3265 }
3266
3267
3268 void hostapd_periodic_iface(struct hostapd_iface *iface)
3269 {
3270         size_t i;
3271
3272         ap_list_timer(iface);
3273
3274         for (i = 0; i < iface->num_bss; i++) {
3275                 struct hostapd_data *hapd = iface->bss[i];
3276
3277                 if (!hapd->started)
3278                         continue;
3279
3280 #ifndef CONFIG_NO_RADIUS
3281                 hostapd_acl_expire(hapd);
3282 #endif /* CONFIG_NO_RADIUS */
3283         }
3284 }