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         dl_list_init(&iface->sta_seen);
1781
1782         hostapd_set_acl(hapd);
1783
1784         if (hostapd_driver_commit(hapd) < 0) {
1785                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1786                            "configuration", __func__);
1787                 goto fail;
1788         }
1789
1790         /*
1791          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1792          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1793          * mode), the interface is up only after driver_commit, so initialize
1794          * WPS after driver_commit.
1795          */
1796         for (j = 0; j < iface->num_bss; j++) {
1797                 if (hostapd_init_wps_complete(iface->bss[j]))
1798                         goto fail;
1799         }
1800
1801         if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
1802             !res_dfs_offload) {
1803                 /*
1804                  * If freq is DFS, and DFS is offloaded to the driver, then wait
1805                  * for CAC to complete.
1806                  */
1807                 wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
1808                 return res_dfs_offload;
1809         }
1810
1811 #ifdef NEED_AP_MLME
1812 dfs_offload:
1813 #endif /* NEED_AP_MLME */
1814
1815 #ifdef CONFIG_FST
1816         if (hapd->iconf->fst_cfg.group_id[0]) {
1817                 struct fst_wpa_obj iface_obj;
1818
1819                 fst_hostapd_fill_iface_obj(hapd, &iface_obj);
1820                 iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
1821                                         &iface_obj, &hapd->iconf->fst_cfg);
1822                 if (!iface->fst) {
1823                         wpa_printf(MSG_ERROR, "Could not attach to FST %s",
1824                                    hapd->iconf->fst_cfg.group_id);
1825                         goto fail;
1826                 }
1827         }
1828 #endif /* CONFIG_FST */
1829
1830         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1831         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1832         if (hapd->setup_complete_cb)
1833                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1834
1835         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1836                    iface->bss[0]->conf->iface);
1837         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1838                 iface->interfaces->terminate_on_error--;
1839
1840         for (j = 0; j < iface->num_bss; j++)
1841                 hostapd_set_own_neighbor_report(iface->bss[j]);
1842
1843         return 0;
1844
1845 fail:
1846         wpa_printf(MSG_ERROR, "Interface initialization failed");
1847         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1848         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1849 #ifdef CONFIG_FST
1850         if (iface->fst) {
1851                 fst_detach(iface->fst);
1852                 iface->fst = NULL;
1853         }
1854 #endif /* CONFIG_FST */
1855         if (iface->interfaces && iface->interfaces->terminate_on_error)
1856                 eloop_terminate();
1857         return -1;
1858 }
1859
1860
1861 /**
1862  * hostapd_setup_interface_complete - Complete interface setup
1863  *
1864  * This function is called when previous steps in the interface setup has been
1865  * completed. This can also start operations, e.g., DFS, that will require
1866  * additional processing before interface is ready to be enabled. Such
1867  * operations will call this function from eloop callbacks when finished.
1868  */
1869 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1870 {
1871         struct hapd_interfaces *interfaces = iface->interfaces;
1872         struct hostapd_data *hapd = iface->bss[0];
1873         unsigned int i;
1874         int not_ready_in_sync_ifaces = 0;
1875
1876         if (!iface->need_to_start_in_sync)
1877                 return hostapd_setup_interface_complete_sync(iface, err);
1878
1879         if (err) {
1880                 wpa_printf(MSG_ERROR, "Interface initialization failed");
1881                 hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1882                 iface->need_to_start_in_sync = 0;
1883                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1884                 if (interfaces && interfaces->terminate_on_error)
1885                         eloop_terminate();
1886                 return -1;
1887         }
1888
1889         if (iface->ready_to_start_in_sync) {
1890                 /* Already in ready and waiting. should never happpen */
1891                 return 0;
1892         }
1893
1894         for (i = 0; i < interfaces->count; i++) {
1895                 if (interfaces->iface[i]->need_to_start_in_sync &&
1896                     !interfaces->iface[i]->ready_to_start_in_sync)
1897                         not_ready_in_sync_ifaces++;
1898         }
1899
1900         /*
1901          * Check if this is the last interface, if yes then start all the other
1902          * waiting interfaces. If not, add this interface to the waiting list.
1903          */
1904         if (not_ready_in_sync_ifaces > 1 && iface->state == HAPD_IFACE_DFS) {
1905                 /*
1906                  * If this interface went through CAC, do not synchronize, just
1907                  * start immediately.
1908                  */
1909                 iface->need_to_start_in_sync = 0;
1910                 wpa_printf(MSG_INFO,
1911                            "%s: Finished CAC - bypass sync and start interface",
1912                            iface->bss[0]->conf->iface);
1913                 return hostapd_setup_interface_complete_sync(iface, err);
1914         }
1915
1916         if (not_ready_in_sync_ifaces > 1) {
1917                 /* need to wait as there are other interfaces still coming up */
1918                 iface->ready_to_start_in_sync = 1;
1919                 wpa_printf(MSG_INFO,
1920                            "%s: Interface waiting to sync with other interfaces",
1921                            iface->bss[0]->conf->iface);
1922                 return 0;
1923         }
1924
1925         wpa_printf(MSG_INFO,
1926                    "%s: Last interface to sync - starting all interfaces",
1927                    iface->bss[0]->conf->iface);
1928         iface->need_to_start_in_sync = 0;
1929         hostapd_setup_interface_complete_sync(iface, err);
1930         for (i = 0; i < interfaces->count; i++) {
1931                 if (interfaces->iface[i]->need_to_start_in_sync &&
1932                     interfaces->iface[i]->ready_to_start_in_sync) {
1933                         hostapd_setup_interface_complete_sync(
1934                                 interfaces->iface[i], 0);
1935                         /* Only once the interfaces are sync started */
1936                         interfaces->iface[i]->need_to_start_in_sync = 0;
1937                 }
1938         }
1939
1940         return 0;
1941 }
1942
1943
1944 /**
1945  * hostapd_setup_interface - Setup of an interface
1946  * @iface: Pointer to interface data.
1947  * Returns: 0 on success, -1 on failure
1948  *
1949  * Initializes the driver interface, validates the configuration,
1950  * and sets driver parameters based on the configuration.
1951  * Flushes old stations, sets the channel, encryption,
1952  * beacons, and WDS links based on the configuration.
1953  *
1954  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1955  * or DFS operations, this function returns 0 before such operations have been
1956  * completed. The pending operations are registered into eloop and will be
1957  * completed from eloop callbacks. Those callbacks end up calling
1958  * hostapd_setup_interface_complete() once setup has been completed.
1959  */
1960 int hostapd_setup_interface(struct hostapd_iface *iface)
1961 {
1962         int ret;
1963
1964         ret = setup_interface(iface);
1965         if (ret) {
1966                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1967                            iface->bss[0]->conf->iface);
1968                 return -1;
1969         }
1970
1971         return 0;
1972 }
1973
1974
1975 /**
1976  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1977  * @hapd_iface: Pointer to interface data
1978  * @conf: Pointer to per-interface configuration
1979  * @bss: Pointer to per-BSS configuration for this BSS
1980  * Returns: Pointer to allocated BSS data
1981  *
1982  * This function is used to allocate per-BSS data structure. This data will be
1983  * freed after hostapd_cleanup() is called for it during interface
1984  * deinitialization.
1985  */
1986 struct hostapd_data *
1987 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1988                        struct hostapd_config *conf,
1989                        struct hostapd_bss_config *bss)
1990 {
1991         struct hostapd_data *hapd;
1992
1993         hapd = os_zalloc(sizeof(*hapd));
1994         if (hapd == NULL)
1995                 return NULL;
1996
1997         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1998         hapd->iconf = conf;
1999         hapd->conf = bss;
2000         hapd->iface = hapd_iface;
2001         hapd->driver = hapd->iconf->driver;
2002         hapd->ctrl_sock = -1;
2003         dl_list_init(&hapd->ctrl_dst);
2004         dl_list_init(&hapd->nr_db);
2005
2006         return hapd;
2007 }
2008
2009
2010 static void hostapd_bss_deinit(struct hostapd_data *hapd)
2011 {
2012         if (!hapd)
2013                 return;
2014         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
2015                    hapd->conf->iface);
2016         hostapd_bss_deinit_no_free(hapd);
2017         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2018         hostapd_cleanup(hapd);
2019 }
2020
2021
2022 void hostapd_interface_deinit(struct hostapd_iface *iface)
2023 {
2024         int j;
2025
2026         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2027         if (iface == NULL)
2028                 return;
2029
2030         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
2031
2032 #ifdef CONFIG_IEEE80211N
2033 #ifdef NEED_AP_MLME
2034         hostapd_stop_setup_timers(iface);
2035         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
2036 #endif /* NEED_AP_MLME */
2037 #endif /* CONFIG_IEEE80211N */
2038         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
2039         iface->wait_channel_update = 0;
2040
2041 #ifdef CONFIG_FST
2042         if (iface->fst) {
2043                 fst_detach(iface->fst);
2044                 iface->fst = NULL;
2045         }
2046 #endif /* CONFIG_FST */
2047
2048         for (j = iface->num_bss - 1; j >= 0; j--) {
2049                 if (!iface->bss)
2050                         break;
2051                 hostapd_bss_deinit(iface->bss[j]);
2052         }
2053 }
2054
2055
2056 void hostapd_interface_free(struct hostapd_iface *iface)
2057 {
2058         size_t j;
2059         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2060         for (j = 0; j < iface->num_bss; j++) {
2061                 if (!iface->bss)
2062                         break;
2063                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
2064                            __func__, iface->bss[j]);
2065                 os_free(iface->bss[j]);
2066         }
2067         hostapd_cleanup_iface(iface);
2068 }
2069
2070
2071 /**
2072  * hostapd_init - Allocate and initialize per-interface data
2073  * @config_file: Path to the configuration file
2074  * Returns: Pointer to the allocated interface data or %NULL on failure
2075  *
2076  * This function is used to allocate main data structures for per-interface
2077  * data. The allocated data buffer will be freed by calling
2078  * hostapd_cleanup_iface().
2079  */
2080 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
2081                                     const char *config_file)
2082 {
2083         struct hostapd_iface *hapd_iface = NULL;
2084         struct hostapd_config *conf = NULL;
2085         struct hostapd_data *hapd;
2086         size_t i;
2087
2088         hapd_iface = os_zalloc(sizeof(*hapd_iface));
2089         if (hapd_iface == NULL)
2090                 goto fail;
2091
2092         hapd_iface->config_fname = os_strdup(config_file);
2093         if (hapd_iface->config_fname == NULL)
2094                 goto fail;
2095
2096         conf = interfaces->config_read_cb(hapd_iface->config_fname);
2097         if (conf == NULL)
2098                 goto fail;
2099         hapd_iface->conf = conf;
2100
2101         hapd_iface->num_bss = conf->num_bss;
2102         hapd_iface->bss = os_calloc(conf->num_bss,
2103                                     sizeof(struct hostapd_data *));
2104         if (hapd_iface->bss == NULL)
2105                 goto fail;
2106
2107         for (i = 0; i < conf->num_bss; i++) {
2108                 hapd = hapd_iface->bss[i] =
2109                         hostapd_alloc_bss_data(hapd_iface, conf,
2110                                                conf->bss[i]);
2111                 if (hapd == NULL)
2112                         goto fail;
2113                 hapd->msg_ctx = hapd;
2114         }
2115
2116         return hapd_iface;
2117
2118 fail:
2119         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
2120                    config_file);
2121         if (conf)
2122                 hostapd_config_free(conf);
2123         if (hapd_iface) {
2124                 os_free(hapd_iface->config_fname);
2125                 os_free(hapd_iface->bss);
2126                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
2127                            __func__, hapd_iface);
2128                 os_free(hapd_iface);
2129         }
2130         return NULL;
2131 }
2132
2133
2134 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
2135 {
2136         size_t i, j;
2137
2138         for (i = 0; i < interfaces->count; i++) {
2139                 struct hostapd_iface *iface = interfaces->iface[i];
2140                 for (j = 0; j < iface->num_bss; j++) {
2141                         struct hostapd_data *hapd = iface->bss[j];
2142                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
2143                                 return 1;
2144                 }
2145         }
2146
2147         return 0;
2148 }
2149
2150
2151 /**
2152  * hostapd_interface_init_bss - Read configuration file and init BSS data
2153  *
2154  * This function is used to parse configuration file for a BSS. This BSS is
2155  * added to an existing interface sharing the same radio (if any) or a new
2156  * interface is created if this is the first interface on a radio. This
2157  * allocate memory for the BSS. No actual driver operations are started.
2158  *
2159  * This is similar to hostapd_interface_init(), but for a case where the
2160  * configuration is used to add a single BSS instead of all BSSes for a radio.
2161  */
2162 struct hostapd_iface *
2163 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
2164                            const char *config_fname, int debug)
2165 {
2166         struct hostapd_iface *new_iface = NULL, *iface = NULL;
2167         struct hostapd_data *hapd;
2168         int k;
2169         size_t i, bss_idx;
2170
2171         if (!phy || !*phy)
2172                 return NULL;
2173
2174         for (i = 0; i < interfaces->count; i++) {
2175                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
2176                         iface = interfaces->iface[i];
2177                         break;
2178                 }
2179         }
2180
2181         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
2182                    config_fname, phy, iface ? "" : " --> new PHY");
2183         if (iface) {
2184                 struct hostapd_config *conf;
2185                 struct hostapd_bss_config **tmp_conf;
2186                 struct hostapd_data **tmp_bss;
2187                 struct hostapd_bss_config *bss;
2188                 const char *ifname;
2189
2190                 /* Add new BSS to existing iface */
2191                 conf = interfaces->config_read_cb(config_fname);
2192                 if (conf == NULL)
2193                         return NULL;
2194                 if (conf->num_bss > 1) {
2195                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
2196                         hostapd_config_free(conf);
2197                         return NULL;
2198                 }
2199
2200                 ifname = conf->bss[0]->iface;
2201                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
2202                         wpa_printf(MSG_ERROR,
2203                                    "Interface name %s already in use", ifname);
2204                         hostapd_config_free(conf);
2205                         return NULL;
2206                 }
2207
2208                 tmp_conf = os_realloc_array(
2209                         iface->conf->bss, iface->conf->num_bss + 1,
2210                         sizeof(struct hostapd_bss_config *));
2211                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
2212                                            sizeof(struct hostapd_data *));
2213                 if (tmp_bss)
2214                         iface->bss = tmp_bss;
2215                 if (tmp_conf) {
2216                         iface->conf->bss = tmp_conf;
2217                         iface->conf->last_bss = tmp_conf[0];
2218                 }
2219                 if (tmp_bss == NULL || tmp_conf == NULL) {
2220                         hostapd_config_free(conf);
2221                         return NULL;
2222                 }
2223                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
2224                 iface->conf->num_bss++;
2225
2226                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
2227                 if (hapd == NULL) {
2228                         iface->conf->num_bss--;
2229                         hostapd_config_free(conf);
2230                         return NULL;
2231                 }
2232                 iface->conf->last_bss = bss;
2233                 iface->bss[iface->num_bss] = hapd;
2234                 hapd->msg_ctx = hapd;
2235
2236                 bss_idx = iface->num_bss++;
2237                 conf->num_bss--;
2238                 conf->bss[0] = NULL;
2239                 hostapd_config_free(conf);
2240         } else {
2241                 /* Add a new iface with the first BSS */
2242                 new_iface = iface = hostapd_init(interfaces, config_fname);
2243                 if (!iface)
2244                         return NULL;
2245                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
2246                 iface->interfaces = interfaces;
2247                 bss_idx = 0;
2248         }
2249
2250         for (k = 0; k < debug; k++) {
2251                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
2252                         iface->bss[bss_idx]->conf->logger_stdout_level--;
2253         }
2254
2255         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
2256             !hostapd_drv_none(iface->bss[bss_idx])) {
2257                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
2258                            config_fname);
2259                 if (new_iface)
2260                         hostapd_interface_deinit_free(new_iface);
2261                 return NULL;
2262         }
2263
2264         return iface;
2265 }
2266
2267
2268 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
2269 {
2270         const struct wpa_driver_ops *driver;
2271         void *drv_priv;
2272
2273         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2274         if (iface == NULL)
2275                 return;
2276         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
2277                    __func__, (unsigned int) iface->num_bss,
2278                    (unsigned int) iface->conf->num_bss);
2279         driver = iface->bss[0]->driver;
2280         drv_priv = iface->bss[0]->drv_priv;
2281         hostapd_interface_deinit(iface);
2282         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2283                    __func__, driver, drv_priv);
2284         if (driver && driver->hapd_deinit && drv_priv) {
2285                 driver->hapd_deinit(drv_priv);
2286                 iface->bss[0]->drv_priv = NULL;
2287         }
2288         hostapd_interface_free(iface);
2289 }
2290
2291
2292 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
2293                                   void *drv_priv,
2294                                   struct hostapd_iface *hapd_iface)
2295 {
2296         size_t j;
2297
2298         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2299                    __func__, driver, drv_priv);
2300         if (driver && driver->hapd_deinit && drv_priv) {
2301                 driver->hapd_deinit(drv_priv);
2302                 for (j = 0; j < hapd_iface->num_bss; j++) {
2303                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
2304                                    __func__, (int) j,
2305                                    hapd_iface->bss[j]->drv_priv);
2306                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
2307                                 hapd_iface->bss[j]->drv_priv = NULL;
2308                 }
2309         }
2310 }
2311
2312
2313 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
2314 {
2315         size_t j;
2316
2317         if (hapd_iface->bss[0]->drv_priv != NULL) {
2318                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
2319                            hapd_iface->conf->bss[0]->iface);
2320                 return -1;
2321         }
2322
2323         wpa_printf(MSG_DEBUG, "Enable interface %s",
2324                    hapd_iface->conf->bss[0]->iface);
2325
2326         for (j = 0; j < hapd_iface->num_bss; j++)
2327                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2328         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2329                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
2330                 return -1;
2331         }
2332
2333         if (hapd_iface->interfaces == NULL ||
2334             hapd_iface->interfaces->driver_init == NULL ||
2335             hapd_iface->interfaces->driver_init(hapd_iface))
2336                 return -1;
2337
2338         if (hostapd_setup_interface(hapd_iface)) {
2339                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
2340                                       hapd_iface->bss[0]->drv_priv,
2341                                       hapd_iface);
2342                 return -1;
2343         }
2344
2345         return 0;
2346 }
2347
2348
2349 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
2350 {
2351         size_t j;
2352
2353         wpa_printf(MSG_DEBUG, "Reload interface %s",
2354                    hapd_iface->conf->bss[0]->iface);
2355         for (j = 0; j < hapd_iface->num_bss; j++)
2356                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2357         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2358                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
2359                 return -1;
2360         }
2361         hostapd_clear_old(hapd_iface);
2362         for (j = 0; j < hapd_iface->num_bss; j++)
2363                 hostapd_reload_bss(hapd_iface->bss[j]);
2364
2365         return 0;
2366 }
2367
2368
2369 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
2370 {
2371         size_t j;
2372         const struct wpa_driver_ops *driver;
2373         void *drv_priv;
2374
2375         if (hapd_iface == NULL)
2376                 return -1;
2377
2378         if (hapd_iface->bss[0]->drv_priv == NULL) {
2379                 wpa_printf(MSG_INFO, "Interface %s already disabled",
2380                            hapd_iface->conf->bss[0]->iface);
2381                 return -1;
2382         }
2383
2384         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2385         driver = hapd_iface->bss[0]->driver;
2386         drv_priv = hapd_iface->bss[0]->drv_priv;
2387
2388         hapd_iface->driver_ap_teardown =
2389                 !!(hapd_iface->drv_flags &
2390                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2391
2392         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
2393         for (j = 0; j < hapd_iface->num_bss; j++) {
2394                 struct hostapd_data *hapd = hapd_iface->bss[j];
2395                 hostapd_bss_deinit_no_free(hapd);
2396                 hostapd_free_hapd_data(hapd);
2397         }
2398
2399         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
2400
2401         /* From hostapd_cleanup_iface: These were initialized in
2402          * hostapd_setup_interface and hostapd_setup_interface_complete
2403          */
2404         hostapd_cleanup_iface_partial(hapd_iface);
2405
2406         wpa_printf(MSG_DEBUG, "Interface %s disabled",
2407                    hapd_iface->bss[0]->conf->iface);
2408         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
2409         return 0;
2410 }
2411
2412
2413 static struct hostapd_iface *
2414 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
2415 {
2416         struct hostapd_iface **iface, *hapd_iface;
2417
2418         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
2419                                  sizeof(struct hostapd_iface *));
2420         if (iface == NULL)
2421                 return NULL;
2422         interfaces->iface = iface;
2423         hapd_iface = interfaces->iface[interfaces->count] =
2424                 os_zalloc(sizeof(*hapd_iface));
2425         if (hapd_iface == NULL) {
2426                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2427                            "the interface", __func__);
2428                 return NULL;
2429         }
2430         interfaces->count++;
2431         hapd_iface->interfaces = interfaces;
2432
2433         return hapd_iface;
2434 }
2435
2436
2437 static struct hostapd_config *
2438 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
2439                      const char *ctrl_iface, const char *driver)
2440 {
2441         struct hostapd_bss_config *bss;
2442         struct hostapd_config *conf;
2443
2444         /* Allocates memory for bss and conf */
2445         conf = hostapd_config_defaults();
2446         if (conf == NULL) {
2447                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2448                                 "configuration", __func__);
2449                 return NULL;
2450         }
2451
2452         if (driver) {
2453                 int j;
2454
2455                 for (j = 0; wpa_drivers[j]; j++) {
2456                         if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
2457                                 conf->driver = wpa_drivers[j];
2458                                 goto skip;
2459                         }
2460                 }
2461
2462                 wpa_printf(MSG_ERROR,
2463                            "Invalid/unknown driver '%s' - registering the default driver",
2464                            driver);
2465         }
2466
2467         conf->driver = wpa_drivers[0];
2468         if (conf->driver == NULL) {
2469                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
2470                 hostapd_config_free(conf);
2471                 return NULL;
2472         }
2473
2474 skip:
2475         bss = conf->last_bss = conf->bss[0];
2476
2477         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
2478         bss->ctrl_interface = os_strdup(ctrl_iface);
2479         if (bss->ctrl_interface == NULL) {
2480                 hostapd_config_free(conf);
2481                 return NULL;
2482         }
2483
2484         /* Reading configuration file skipped, will be done in SET!
2485          * From reading the configuration till the end has to be done in
2486          * SET
2487          */
2488         return conf;
2489 }
2490
2491
2492 static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
2493                               struct hostapd_config *conf)
2494 {
2495         size_t i;
2496         struct hostapd_data *hapd;
2497
2498         hapd_iface->bss = os_calloc(conf->num_bss,
2499                                     sizeof(struct hostapd_data *));
2500         if (hapd_iface->bss == NULL)
2501                 return -1;
2502
2503         for (i = 0; i < conf->num_bss; i++) {
2504                 hapd = hapd_iface->bss[i] =
2505                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
2506                 if (hapd == NULL) {
2507                         while (i > 0) {
2508                                 i--;
2509                                 os_free(hapd_iface->bss[i]);
2510                                 hapd_iface->bss[i] = NULL;
2511                         }
2512                         os_free(hapd_iface->bss);
2513                         hapd_iface->bss = NULL;
2514                         return -1;
2515                 }
2516                 hapd->msg_ctx = hapd;
2517         }
2518
2519         hapd_iface->conf = conf;
2520         hapd_iface->num_bss = conf->num_bss;
2521
2522         return 0;
2523 }
2524
2525
2526 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
2527 {
2528         struct hostapd_config *conf = NULL;
2529         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
2530         struct hostapd_data *hapd;
2531         char *ptr;
2532         size_t i, j;
2533         const char *conf_file = NULL, *phy_name = NULL;
2534
2535         if (os_strncmp(buf, "bss_config=", 11) == 0) {
2536                 char *pos;
2537                 phy_name = buf + 11;
2538                 pos = os_strchr(phy_name, ':');
2539                 if (!pos)
2540                         return -1;
2541                 *pos++ = '\0';
2542                 conf_file = pos;
2543                 if (!os_strlen(conf_file))
2544                         return -1;
2545
2546                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
2547                                                         conf_file, 0);
2548                 if (!hapd_iface)
2549                         return -1;
2550                 for (j = 0; j < interfaces->count; j++) {
2551                         if (interfaces->iface[j] == hapd_iface)
2552                                 break;
2553                 }
2554                 if (j == interfaces->count) {
2555                         struct hostapd_iface **tmp;
2556                         tmp = os_realloc_array(interfaces->iface,
2557                                                interfaces->count + 1,
2558                                                sizeof(struct hostapd_iface *));
2559                         if (!tmp) {
2560                                 hostapd_interface_deinit_free(hapd_iface);
2561                                 return -1;
2562                         }
2563                         interfaces->iface = tmp;
2564                         interfaces->iface[interfaces->count++] = hapd_iface;
2565                         new_iface = hapd_iface;
2566                 }
2567
2568                 if (new_iface) {
2569                         if (interfaces->driver_init(hapd_iface))
2570                                 goto fail;
2571
2572                         if (hostapd_setup_interface(hapd_iface)) {
2573                                 hostapd_deinit_driver(
2574                                         hapd_iface->bss[0]->driver,
2575                                         hapd_iface->bss[0]->drv_priv,
2576                                         hapd_iface);
2577                                 goto fail;
2578                         }
2579                 } else {
2580                         /* Assign new BSS with bss[0]'s driver info */
2581                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
2582                         hapd->driver = hapd_iface->bss[0]->driver;
2583                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
2584                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
2585                                   ETH_ALEN);
2586
2587                         if (start_ctrl_iface_bss(hapd) < 0 ||
2588                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
2589                              hostapd_setup_bss(hapd, -1))) {
2590                                 hostapd_cleanup(hapd);
2591                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
2592                                 hapd_iface->conf->num_bss--;
2593                                 hapd_iface->num_bss--;
2594                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
2595                                            __func__, hapd, hapd->conf->iface);
2596                                 hostapd_config_free_bss(hapd->conf);
2597                                 hapd->conf = NULL;
2598                                 os_free(hapd);
2599                                 return -1;
2600                         }
2601                 }
2602                 return 0;
2603         }
2604
2605         ptr = os_strchr(buf, ' ');
2606         if (ptr == NULL)
2607                 return -1;
2608         *ptr++ = '\0';
2609
2610         if (os_strncmp(ptr, "config=", 7) == 0)
2611                 conf_file = ptr + 7;
2612
2613         for (i = 0; i < interfaces->count; i++) {
2614                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
2615                                buf)) {
2616                         wpa_printf(MSG_INFO, "Cannot add interface - it "
2617                                    "already exists");
2618                         return -1;
2619                 }
2620         }
2621
2622         hapd_iface = hostapd_iface_alloc(interfaces);
2623         if (hapd_iface == NULL) {
2624                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2625                            "for interface", __func__);
2626                 goto fail;
2627         }
2628         new_iface = hapd_iface;
2629
2630         if (conf_file && interfaces->config_read_cb) {
2631                 conf = interfaces->config_read_cb(conf_file);
2632                 if (conf && conf->bss)
2633                         os_strlcpy(conf->bss[0]->iface, buf,
2634                                    sizeof(conf->bss[0]->iface));
2635         } else {
2636                 char *driver = os_strchr(ptr, ' ');
2637
2638                 if (driver)
2639                         *driver++ = '\0';
2640                 conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
2641         }
2642
2643         if (conf == NULL || conf->bss == NULL) {
2644                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2645                            "for configuration", __func__);
2646                 goto fail;
2647         }
2648
2649         if (hostapd_data_alloc(hapd_iface, conf) < 0) {
2650                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2651                            "for hostapd", __func__);
2652                 goto fail;
2653         }
2654         conf = NULL;
2655
2656         if (start_ctrl_iface(hapd_iface) < 0)
2657                 goto fail;
2658
2659         wpa_printf(MSG_INFO, "Add interface '%s'",
2660                    hapd_iface->conf->bss[0]->iface);
2661
2662         return 0;
2663
2664 fail:
2665         if (conf)
2666                 hostapd_config_free(conf);
2667         if (hapd_iface) {
2668                 if (hapd_iface->bss) {
2669                         for (i = 0; i < hapd_iface->num_bss; i++) {
2670                                 hapd = hapd_iface->bss[i];
2671                                 if (!hapd)
2672                                         continue;
2673                                 if (hapd_iface->interfaces &&
2674                                     hapd_iface->interfaces->ctrl_iface_deinit)
2675                                         hapd_iface->interfaces->
2676                                                 ctrl_iface_deinit(hapd);
2677                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2678                                            __func__, hapd_iface->bss[i],
2679                                            hapd->conf->iface);
2680                                 hostapd_cleanup(hapd);
2681                                 os_free(hapd);
2682                                 hapd_iface->bss[i] = NULL;
2683                         }
2684                         os_free(hapd_iface->bss);
2685                         hapd_iface->bss = NULL;
2686                 }
2687                 if (new_iface) {
2688                         interfaces->count--;
2689                         interfaces->iface[interfaces->count] = NULL;
2690                 }
2691                 hostapd_cleanup_iface(hapd_iface);
2692         }
2693         return -1;
2694 }
2695
2696
2697 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
2698 {
2699         size_t i;
2700
2701         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
2702
2703         /* Remove hostapd_data only if it has already been initialized */
2704         if (idx < iface->num_bss) {
2705                 struct hostapd_data *hapd = iface->bss[idx];
2706
2707                 hostapd_bss_deinit(hapd);
2708                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2709                            __func__, hapd, hapd->conf->iface);
2710                 hostapd_config_free_bss(hapd->conf);
2711                 hapd->conf = NULL;
2712                 os_free(hapd);
2713
2714                 iface->num_bss--;
2715
2716                 for (i = idx; i < iface->num_bss; i++)
2717                         iface->bss[i] = iface->bss[i + 1];
2718         } else {
2719                 hostapd_config_free_bss(iface->conf->bss[idx]);
2720                 iface->conf->bss[idx] = NULL;
2721         }
2722
2723         iface->conf->num_bss--;
2724         for (i = idx; i < iface->conf->num_bss; i++)
2725                 iface->conf->bss[i] = iface->conf->bss[i + 1];
2726
2727         return 0;
2728 }
2729
2730
2731 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2732 {
2733         struct hostapd_iface *hapd_iface;
2734         size_t i, j, k = 0;
2735
2736         for (i = 0; i < interfaces->count; i++) {
2737                 hapd_iface = interfaces->iface[i];
2738                 if (hapd_iface == NULL)
2739                         return -1;
2740                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2741                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2742                         hapd_iface->driver_ap_teardown =
2743                                 !!(hapd_iface->drv_flags &
2744                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2745
2746                         hostapd_interface_deinit_free(hapd_iface);
2747                         k = i;
2748                         while (k < (interfaces->count - 1)) {
2749                                 interfaces->iface[k] =
2750                                         interfaces->iface[k + 1];
2751                                 k++;
2752                         }
2753                         interfaces->count--;
2754                         return 0;
2755                 }
2756
2757                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2758                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2759                                 hapd_iface->driver_ap_teardown =
2760                                         !(hapd_iface->drv_flags &
2761                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2762                                 return hostapd_remove_bss(hapd_iface, j);
2763                         }
2764                 }
2765         }
2766         return -1;
2767 }
2768
2769
2770 /**
2771  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2772  * @hapd: Pointer to BSS data
2773  * @sta: Pointer to the associated STA data
2774  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2775  *
2776  * This function will be called whenever a station associates with the AP. It
2777  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2778  * from drv_callbacks.c based on driver events for drivers that take care of
2779  * management frames (IEEE 802.11 authentication and association) internally.
2780  */
2781 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2782                            int reassoc)
2783 {
2784         if (hapd->tkip_countermeasures) {
2785                 hostapd_drv_sta_deauth(hapd, sta->addr,
2786                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2787                 return;
2788         }
2789
2790         hostapd_prune_associations(hapd, sta->addr);
2791         ap_sta_clear_disconnect_timeouts(hapd, sta);
2792
2793         /* IEEE 802.11F (IAPP) */
2794         if (hapd->conf->ieee802_11f)
2795                 iapp_new_station(hapd->iapp, sta);
2796
2797 #ifdef CONFIG_P2P
2798         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2799                 sta->no_p2p_set = 1;
2800                 hapd->num_sta_no_p2p++;
2801                 if (hapd->num_sta_no_p2p == 1)
2802                         hostapd_p2p_non_p2p_sta_connected(hapd);
2803         }
2804 #endif /* CONFIG_P2P */
2805
2806         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2807          * IEEE 802.1X/WPA code will start accounting after the station has
2808          * been authorized. */
2809         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2810                 ap_sta_set_authorized(hapd, sta, 1);
2811                 os_get_reltime(&sta->connected_time);
2812                 accounting_sta_start(hapd, sta);
2813         }
2814
2815         /* Start IEEE 802.1X authentication process for new stations */
2816         ieee802_1x_new_station(hapd, sta);
2817         if (reassoc) {
2818                 if (sta->auth_alg != WLAN_AUTH_FT &&
2819                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2820                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2821         } else
2822                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2823
2824         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2825                 wpa_printf(MSG_DEBUG,
2826                            "%s: %s: reschedule ap_handle_timer timeout for "
2827                            MACSTR " (%d seconds - ap_max_inactivity)",
2828                            hapd->conf->iface, __func__, MAC2STR(sta->addr),
2829                            hapd->conf->ap_max_inactivity);
2830                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2831                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2832                                        ap_handle_timer, hapd, sta);
2833         }
2834 }
2835
2836
2837 const char * hostapd_state_text(enum hostapd_iface_state s)
2838 {
2839         switch (s) {
2840         case HAPD_IFACE_UNINITIALIZED:
2841                 return "UNINITIALIZED";
2842         case HAPD_IFACE_DISABLED:
2843                 return "DISABLED";
2844         case HAPD_IFACE_COUNTRY_UPDATE:
2845                 return "COUNTRY_UPDATE";
2846         case HAPD_IFACE_ACS:
2847                 return "ACS";
2848         case HAPD_IFACE_HT_SCAN:
2849                 return "HT_SCAN";
2850         case HAPD_IFACE_DFS:
2851                 return "DFS";
2852         case HAPD_IFACE_ENABLED:
2853                 return "ENABLED";
2854         }
2855
2856         return "UNKNOWN";
2857 }
2858
2859
2860 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2861 {
2862         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2863                    iface->conf ? iface->conf->bss[0]->iface : "N/A",
2864                    hostapd_state_text(iface->state), hostapd_state_text(s));
2865         iface->state = s;
2866 }
2867
2868
2869 int hostapd_csa_in_progress(struct hostapd_iface *iface)
2870 {
2871         unsigned int i;
2872
2873         for (i = 0; i < iface->num_bss; i++)
2874                 if (iface->bss[i]->csa_in_progress)
2875                         return 1;
2876         return 0;
2877 }
2878
2879
2880 #ifdef NEED_AP_MLME
2881
2882 static void free_beacon_data(struct beacon_data *beacon)
2883 {
2884         os_free(beacon->head);
2885         beacon->head = NULL;
2886         os_free(beacon->tail);
2887         beacon->tail = NULL;
2888         os_free(beacon->probe_resp);
2889         beacon->probe_resp = NULL;
2890         os_free(beacon->beacon_ies);
2891         beacon->beacon_ies = NULL;
2892         os_free(beacon->proberesp_ies);
2893         beacon->proberesp_ies = NULL;
2894         os_free(beacon->assocresp_ies);
2895         beacon->assocresp_ies = NULL;
2896 }
2897
2898
2899 static int hostapd_build_beacon_data(struct hostapd_data *hapd,
2900                                      struct beacon_data *beacon)
2901 {
2902         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2903         struct wpa_driver_ap_params params;
2904         int ret;
2905
2906         os_memset(beacon, 0, sizeof(*beacon));
2907         ret = ieee802_11_build_ap_params(hapd, &params);
2908         if (ret < 0)
2909                 return ret;
2910
2911         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2912                                          &proberesp_extra,
2913                                          &assocresp_extra);
2914         if (ret)
2915                 goto free_ap_params;
2916
2917         ret = -1;
2918         beacon->head = os_malloc(params.head_len);
2919         if (!beacon->head)
2920                 goto free_ap_extra_ies;
2921
2922         os_memcpy(beacon->head, params.head, params.head_len);
2923         beacon->head_len = params.head_len;
2924
2925         beacon->tail = os_malloc(params.tail_len);
2926         if (!beacon->tail)
2927                 goto free_beacon;
2928
2929         os_memcpy(beacon->tail, params.tail, params.tail_len);
2930         beacon->tail_len = params.tail_len;
2931
2932         if (params.proberesp != NULL) {
2933                 beacon->probe_resp = os_malloc(params.proberesp_len);
2934                 if (!beacon->probe_resp)
2935                         goto free_beacon;
2936
2937                 os_memcpy(beacon->probe_resp, params.proberesp,
2938                           params.proberesp_len);
2939                 beacon->probe_resp_len = params.proberesp_len;
2940         }
2941
2942         /* copy the extra ies */
2943         if (beacon_extra) {
2944                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2945                 if (!beacon->beacon_ies)
2946                         goto free_beacon;
2947
2948                 os_memcpy(beacon->beacon_ies,
2949                           beacon_extra->buf, wpabuf_len(beacon_extra));
2950                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2951         }
2952
2953         if (proberesp_extra) {
2954                 beacon->proberesp_ies =
2955                         os_malloc(wpabuf_len(proberesp_extra));
2956                 if (!beacon->proberesp_ies)
2957                         goto free_beacon;
2958
2959                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2960                           wpabuf_len(proberesp_extra));
2961                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2962         }
2963
2964         if (assocresp_extra) {
2965                 beacon->assocresp_ies =
2966                         os_malloc(wpabuf_len(assocresp_extra));
2967                 if (!beacon->assocresp_ies)
2968                         goto free_beacon;
2969
2970                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2971                           wpabuf_len(assocresp_extra));
2972                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2973         }
2974
2975         ret = 0;
2976 free_beacon:
2977         /* if the function fails, the caller should not free beacon data */
2978         if (ret)
2979                 free_beacon_data(beacon);
2980
2981 free_ap_extra_ies:
2982         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2983                                   assocresp_extra);
2984 free_ap_params:
2985         ieee802_11_free_ap_params(&params);
2986         return ret;
2987 }
2988
2989
2990 /*
2991  * TODO: This flow currently supports only changing channel and width within
2992  * the same hw_mode. Any other changes to MAC parameters or provided settings
2993  * are not supported.
2994  */
2995 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2996                                       struct hostapd_config *conf,
2997                                       struct hostapd_freq_params *params,
2998                                       struct hostapd_freq_params *old_params)
2999 {
3000         int channel;
3001
3002         if (!params->channel) {
3003                 /* check if the new channel is supported by hw */
3004                 params->channel = hostapd_hw_get_channel(hapd, params->freq);
3005         }
3006
3007         channel = params->channel;
3008         if (!channel)
3009                 return -1;
3010
3011         /* if a pointer to old_params is provided we save previous state */
3012         if (old_params &&
3013             hostapd_set_freq_params(old_params, conf->hw_mode,
3014                                     hostapd_hw_get_freq(hapd, conf->channel),
3015                                     conf->channel, conf->ieee80211n,
3016                                     conf->ieee80211ac,
3017                                     conf->secondary_channel,
3018                                     conf->vht_oper_chwidth,
3019                                     conf->vht_oper_centr_freq_seg0_idx,
3020                                     conf->vht_oper_centr_freq_seg1_idx,
3021                                     conf->vht_capab))
3022                 return -1;
3023
3024         switch (params->bandwidth) {
3025         case 0:
3026         case 20:
3027         case 40:
3028                 conf->vht_oper_chwidth = VHT_CHANWIDTH_USE_HT;
3029                 break;
3030         case 80:
3031                 if (params->center_freq2)
3032                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80P80MHZ;
3033                 else
3034                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80MHZ;
3035                 break;
3036         case 160:
3037                 conf->vht_oper_chwidth = VHT_CHANWIDTH_160MHZ;
3038                 break;
3039         default:
3040                 return -1;
3041         }
3042
3043         conf->channel = channel;
3044         conf->ieee80211n = params->ht_enabled;
3045         conf->secondary_channel = params->sec_channel_offset;
3046         ieee80211_freq_to_chan(params->center_freq1,
3047                                &conf->vht_oper_centr_freq_seg0_idx);
3048         ieee80211_freq_to_chan(params->center_freq2,
3049                                &conf->vht_oper_centr_freq_seg1_idx);
3050
3051         /* TODO: maybe call here hostapd_config_check here? */
3052
3053         return 0;
3054 }
3055
3056
3057 static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
3058                                      struct csa_settings *settings)
3059 {
3060         struct hostapd_iface *iface = hapd->iface;
3061         struct hostapd_freq_params old_freq;
3062         int ret;
3063         u8 chan, vht_bandwidth;
3064
3065         os_memset(&old_freq, 0, sizeof(old_freq));
3066         if (!iface || !iface->freq || hapd->csa_in_progress)
3067                 return -1;
3068
3069         switch (settings->freq_params.bandwidth) {
3070         case 80:
3071                 if (settings->freq_params.center_freq2)
3072                         vht_bandwidth = VHT_CHANWIDTH_80P80MHZ;
3073                 else
3074                         vht_bandwidth = VHT_CHANWIDTH_80MHZ;
3075                 break;
3076         case 160:
3077                 vht_bandwidth = VHT_CHANWIDTH_160MHZ;
3078                 break;
3079         default:
3080                 vht_bandwidth = VHT_CHANWIDTH_USE_HT;
3081                 break;
3082         }
3083
3084         if (ieee80211_freq_to_channel_ext(
3085                     settings->freq_params.freq,
3086                     settings->freq_params.sec_channel_offset,
3087                     vht_bandwidth,
3088                     &hapd->iface->cs_oper_class,
3089                     &chan) == NUM_HOSTAPD_MODES) {
3090                 wpa_printf(MSG_DEBUG,
3091                            "invalid frequency for channel switch (freq=%d, sec_channel_offset=%d, vht_enabled=%d)",
3092                            settings->freq_params.freq,
3093                            settings->freq_params.sec_channel_offset,
3094                            settings->freq_params.vht_enabled);
3095                 return -1;
3096         }
3097
3098         settings->freq_params.channel = chan;
3099
3100         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
3101                                          &settings->freq_params,
3102                                          &old_freq);
3103         if (ret)
3104                 return ret;
3105
3106         ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
3107
3108         /* change back the configuration */
3109         hostapd_change_config_freq(iface->bss[0], iface->conf,
3110                                    &old_freq, NULL);
3111
3112         if (ret)
3113                 return ret;
3114
3115         /* set channel switch parameters for csa ie */
3116         hapd->cs_freq_params = settings->freq_params;
3117         hapd->cs_count = settings->cs_count;
3118         hapd->cs_block_tx = settings->block_tx;
3119
3120         ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
3121         if (ret) {
3122                 free_beacon_data(&settings->beacon_after);
3123                 return ret;
3124         }
3125
3126         settings->counter_offset_beacon[0] = hapd->cs_c_off_beacon;
3127         settings->counter_offset_presp[0] = hapd->cs_c_off_proberesp;
3128         settings->counter_offset_beacon[1] = hapd->cs_c_off_ecsa_beacon;
3129         settings->counter_offset_presp[1] = hapd->cs_c_off_ecsa_proberesp;
3130
3131         return 0;
3132 }
3133
3134
3135 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
3136 {
3137         os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
3138         hapd->cs_count = 0;
3139         hapd->cs_block_tx = 0;
3140         hapd->cs_c_off_beacon = 0;
3141         hapd->cs_c_off_proberesp = 0;
3142         hapd->csa_in_progress = 0;
3143         hapd->cs_c_off_ecsa_beacon = 0;
3144         hapd->cs_c_off_ecsa_proberesp = 0;
3145 }
3146
3147
3148 int hostapd_switch_channel(struct hostapd_data *hapd,
3149                            struct csa_settings *settings)
3150 {
3151         int ret;
3152
3153         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
3154                 wpa_printf(MSG_INFO, "CSA is not supported");
3155                 return -1;
3156         }
3157
3158         ret = hostapd_fill_csa_settings(hapd, settings);
3159         if (ret)
3160                 return ret;
3161
3162         ret = hostapd_drv_switch_channel(hapd, settings);
3163         free_beacon_data(&settings->beacon_csa);
3164         free_beacon_data(&settings->beacon_after);
3165
3166         if (ret) {
3167                 /* if we failed, clean cs parameters */
3168                 hostapd_cleanup_cs_params(hapd);
3169                 return ret;
3170         }
3171
3172         hapd->csa_in_progress = 1;
3173         return 0;
3174 }
3175
3176
3177 void
3178 hostapd_switch_channel_fallback(struct hostapd_iface *iface,
3179                                 const struct hostapd_freq_params *freq_params)
3180 {
3181         int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
3182         unsigned int i;
3183
3184         wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
3185
3186         if (freq_params->center_freq1)
3187                 vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
3188         if (freq_params->center_freq2)
3189                 vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
3190
3191         switch (freq_params->bandwidth) {
3192         case 0:
3193         case 20:
3194         case 40:
3195                 vht_bw = VHT_CHANWIDTH_USE_HT;
3196                 break;
3197         case 80:
3198                 if (freq_params->center_freq2)
3199                         vht_bw = VHT_CHANWIDTH_80P80MHZ;
3200                 else
3201                         vht_bw = VHT_CHANWIDTH_80MHZ;
3202                 break;
3203         case 160:
3204                 vht_bw = VHT_CHANWIDTH_160MHZ;
3205                 break;
3206         default:
3207                 wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
3208                            freq_params->bandwidth);
3209                 break;
3210         }
3211
3212         iface->freq = freq_params->freq;
3213         iface->conf->channel = freq_params->channel;
3214         iface->conf->secondary_channel = freq_params->sec_channel_offset;
3215         iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
3216         iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
3217         iface->conf->vht_oper_chwidth = vht_bw;
3218         iface->conf->ieee80211n = freq_params->ht_enabled;
3219         iface->conf->ieee80211ac = freq_params->vht_enabled;
3220
3221         /*
3222          * cs_params must not be cleared earlier because the freq_params
3223          * argument may actually point to one of these.
3224          */
3225         for (i = 0; i < iface->num_bss; i++)
3226                 hostapd_cleanup_cs_params(iface->bss[i]);
3227
3228         hostapd_disable_iface(iface);
3229         hostapd_enable_iface(iface);
3230 }
3231
3232 #endif /* NEED_AP_MLME */
3233
3234
3235 struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
3236                                         const char *ifname)
3237 {
3238         size_t i, j;
3239
3240         for (i = 0; i < interfaces->count; i++) {
3241                 struct hostapd_iface *iface = interfaces->iface[i];
3242
3243                 for (j = 0; j < iface->num_bss; j++) {
3244                         struct hostapd_data *hapd = iface->bss[j];
3245
3246                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
3247                                 return hapd;
3248                 }
3249         }
3250
3251         return NULL;
3252 }
3253
3254
3255 void hostapd_periodic_iface(struct hostapd_iface *iface)
3256 {
3257         size_t i;
3258
3259         ap_list_timer(iface);
3260
3261         for (i = 0; i < iface->num_bss; i++) {
3262                 struct hostapd_data *hapd = iface->bss[i];
3263
3264                 if (!hapd->started)
3265                         continue;
3266
3267 #ifndef CONFIG_NO_RADIUS
3268                 hostapd_acl_expire(hapd);
3269 #endif /* CONFIG_NO_RADIUS */
3270         }
3271 }