src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "radius/radius_client.h"
  16 #include "radius/radius_das.h"
  17 #include "eap_server/tncs.h"
  18 #include "eapol_auth/eapol_auth_sm.h"
  19 #include "eapol_auth/eapol_auth_sm_i.h"
  20 #include "hostapd.h"
  21 #include "authsrv.h"
  22 #include "sta_info.h"
  23 #include "accounting.h"
  24 #include "ap_list.h"
  25 #include "beacon.h"
  26 #include "iapp.h"
  27 #include "ieee802_1x.h"
  28 #include "ieee802_11_auth.h"
  29 #include "vlan_init.h"
  30 #include "wpa_auth.h"
  31 #include "wps_hostapd.h"
  32 #include "hw_features.h"
  33 #include "wpa_auth_glue.h"
  34 #include "ap_drv_ops.h"
  35 #include "ap_config.h"
  36 #include "p2p_hostapd.h"
  37 #include "gas_serv.h"
  38 #include "dfs.h"
  39 #include "ieee802_11.h"
  40 #include "bss_load.h"
  41 #include "x_snoop.h"
  42 #include "dhcp_snoop.h"
  43 #include "ndisc_snoop.h"
  44
  45
  46 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  47 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  48 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  49 static int setup_interface2(struct hostapd_iface *iface);
  50 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
  51
  52
  53 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  54                                int (*cb)(struct hostapd_iface *iface,
  55                                          void *ctx), void *ctx)
  56 {
  57         size_t i;
  58         int ret;
  59
  60         for (i = 0; i < interfaces->count; i++) {
  61                 ret = cb(interfaces->iface[i], ctx);
  62                 if (ret)
  63                         return ret;
  64         }
  65
  66         return 0;
  67 }
  68
  69
  70 static void hostapd_reload_bss(struct hostapd_data *hapd)
  71 {
  72         struct hostapd_ssid *ssid;
  73
  74 #ifndef CONFIG_NO_RADIUS
  75         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  76 #endif /* CONFIG_NO_RADIUS */
  77
  78         ssid = &hapd->conf->ssid;
  79         if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  80             ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  81                 /*
  82                  * Force PSK to be derived again since SSID or passphrase may
  83                  * have changed.
  84                  */
  85                 hostapd_config_clear_wpa_psk(&hapd->conf->ssid.wpa_psk);
  86         }
  87         if (hostapd_setup_wpa_psk(hapd->conf)) {
  88                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  89                            "after reloading configuration");
  90         }
  91
  92         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  93                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  94         else
  95                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  96
  97         if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
  98                 hostapd_setup_wpa(hapd);
  99                 if (hapd->wpa_auth)
 100                         wpa_init_keys(hapd->wpa_auth);
 101         } else if (hapd->conf->wpa) {
 102                 const u8 *wpa_ie;
 103                 size_t wpa_ie_len;
 104                 hostapd_reconfig_wpa(hapd);
 105                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
 106                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
 107                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 108                                    "the kernel driver.");
 109         } else if (hapd->wpa_auth) {
 110                 wpa_deinit(hapd->wpa_auth);
 111                 hapd->wpa_auth = NULL;
 112                 hostapd_set_privacy(hapd, 0);
 113                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 114                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 115         }
 116
 117         ieee802_11_set_beacon(hapd);
 118         hostapd_update_wps(hapd);
 119
 120         if (hapd->conf->ssid.ssid_set &&
 121             hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
 122                              hapd->conf->ssid.ssid_len)) {
 123                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 124                 /* try to continue */
 125         }
 126         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 127 }
 128
 129
 130 static void hostapd_clear_old(struct hostapd_iface *iface)
 131 {
 132         size_t j;
 133
 134         /*
 135          * Deauthenticate all stations since the new configuration may not
 136          * allow them to use the BSS anymore.
 137          */
 138         for (j = 0; j < iface->num_bss; j++) {
 139                 hostapd_flush_old_stations(iface->bss[j],
 140                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 141                 hostapd_broadcast_wep_clear(iface->bss[j]);
 142
 143 #ifndef CONFIG_NO_RADIUS
 144                 /* TODO: update dynamic data based on changed configuration
 145                  * items (e.g., open/close sockets, etc.) */
 146                 radius_client_flush(iface->bss[j]->radius, 0);
 147 #endif /* CONFIG_NO_RADIUS */
 148         }
 149 }
 150
 151
 152 int hostapd_reload_config(struct hostapd_iface *iface)
 153 {
 154         struct hostapd_data *hapd = iface->bss[0];
 155         struct hostapd_config *newconf, *oldconf;
 156         size_t j;
 157
 158         if (iface->config_fname == NULL) {
 159                 /* Only in-memory config in use - assume it has been updated */
 160                 hostapd_clear_old(iface);
 161                 for (j = 0; j < iface->num_bss; j++)
 162                         hostapd_reload_bss(iface->bss[j]);
 163                 return 0;
 164         }
 165
 166         if (iface->interfaces == NULL ||
 167             iface->interfaces->config_read_cb == NULL)
 168                 return -1;
 169         newconf = iface->interfaces->config_read_cb(iface->config_fname);
 170         if (newconf == NULL)
 171                 return -1;
 172
 173         hostapd_clear_old(iface);
 174
 175         oldconf = hapd->iconf;
 176         iface->conf = newconf;
 177
 178         for (j = 0; j < iface->num_bss; j++) {
 179                 hapd = iface->bss[j];
 180                 hapd->iconf = newconf;
 181                 hapd->iconf->channel = oldconf->channel;
 182                 hapd->iconf->secondary_channel = oldconf->secondary_channel;
 183                 hapd->iconf->ieee80211n = oldconf->ieee80211n;
 184                 hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
 185                 hapd->iconf->ht_capab = oldconf->ht_capab;
 186                 hapd->iconf->vht_capab = oldconf->vht_capab;
 187                 hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
 188                 hapd->iconf->vht_oper_centr_freq_seg0_idx =
 189                         oldconf->vht_oper_centr_freq_seg0_idx;
 190                 hapd->iconf->vht_oper_centr_freq_seg1_idx =
 191                         oldconf->vht_oper_centr_freq_seg1_idx;
 192                 hapd->conf = newconf->bss[j];
 193                 hostapd_reload_bss(hapd);
 194         }
 195
 196         hostapd_config_free(oldconf);
 197
 198
 199         return 0;
 200 }
 201
 202
 203 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 204                                               char *ifname)
 205 {
 206         int i;
 207
 208         for (i = 0; i < NUM_WEP_KEYS; i++) {
 209                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 210                                         0, NULL, 0, NULL, 0)) {
 211                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 212                                    "encryption keys (ifname=%s keyidx=%d)",
 213                                    ifname, i);
 214                 }
 215         }
 216 #ifdef CONFIG_IEEE80211W
 217         if (hapd->conf->ieee80211w) {
 218                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 219                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 220                                                 NULL, i, 0, NULL,
 221                                                 0, NULL, 0)) {
 222                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 223                                            "default mgmt encryption keys "
 224                                            "(ifname=%s keyidx=%d)", ifname, i);
 225                         }
 226                 }
 227         }
 228 #endif /* CONFIG_IEEE80211W */
 229 }
 230
 231
 232 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 233 {
 234         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 235         return 0;
 236 }
 237
 238
 239 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 240 {
 241         int errors = 0, idx;
 242         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 243
 244         idx = ssid->wep.idx;
 245         if (ssid->wep.default_len &&
 246             hostapd_drv_set_key(hapd->conf->iface,
 247                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 248                                 1, NULL, 0, ssid->wep.key[idx],
 249                                 ssid->wep.len[idx])) {
 250                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 251                 errors++;
 252         }
 253
 254         return errors;
 255 }
 256
 257
 258 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 259 {
 260         os_free(hapd->probereq_cb);
 261         hapd->probereq_cb = NULL;
 262
 263 #ifdef CONFIG_P2P
 264         wpabuf_free(hapd->p2p_beacon_ie);
 265         hapd->p2p_beacon_ie = NULL;
 266         wpabuf_free(hapd->p2p_probe_resp_ie);
 267         hapd->p2p_probe_resp_ie = NULL;
 268 #endif /* CONFIG_P2P */
 269
 270         if (!hapd->started) {
 271                 wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
 272                            __func__, hapd->conf->iface);
 273                 return;
 274         }
 275         hapd->started = 0;
 276
 277         wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
 278         iapp_deinit(hapd->iapp);
 279         hapd->iapp = NULL;
 280         accounting_deinit(hapd);
 281         hostapd_deinit_wpa(hapd);
 282         vlan_deinit(hapd);
 283         hostapd_acl_deinit(hapd);
 284 #ifndef CONFIG_NO_RADIUS
 285         radius_client_deinit(hapd->radius);
 286         hapd->radius = NULL;
 287         radius_das_deinit(hapd->radius_das);
 288         hapd->radius_das = NULL;
 289 #endif /* CONFIG_NO_RADIUS */
 290
 291         hostapd_deinit_wps(hapd);
 292
 293         authsrv_deinit(hapd);
 294
 295         if (hapd->interface_added) {
 296                 hapd->interface_added = 0;
 297                 if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 298                         wpa_printf(MSG_WARNING,
 299                                    "Failed to remove BSS interface %s",
 300                                    hapd->conf->iface);
 301                         hapd->interface_added = 1;
 302                 } else {
 303                         /*
 304                          * Since this was a dynamically added interface, the
 305                          * driver wrapper may have removed its internal instance
 306                          * and hapd->drv_priv is not valid anymore.
 307                          */
 308                         hapd->drv_priv = NULL;
 309                 }
 310         }
 311
 312         wpabuf_free(hapd->time_adv);
 313
 314 #ifdef CONFIG_INTERWORKING
 315         gas_serv_deinit(hapd);
 316 #endif /* CONFIG_INTERWORKING */
 317
 318         bss_load_update_deinit(hapd);
 319         ndisc_snoop_deinit(hapd);
 320         dhcp_snoop_deinit(hapd);
 321         x_snoop_deinit(hapd);
 322
 323 #ifdef CONFIG_SQLITE
 324         bin_clear_free(hapd->tmp_eap_user.identity,
 325                        hapd->tmp_eap_user.identity_len);
 326         bin_clear_free(hapd->tmp_eap_user.password,
 327                        hapd->tmp_eap_user.password_len);
 328 #endif /* CONFIG_SQLITE */
 329
 330 #ifdef CONFIG_MESH
 331         wpabuf_free(hapd->mesh_pending_auth);
 332         hapd->mesh_pending_auth = NULL;
 333 #endif /* CONFIG_MESH */
 334 }
 335
 336
 337 /**
 338  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 339  * @hapd: Pointer to BSS data
 340  *
 341  * This function is used to free all per-BSS data structures and resources.
 342  * Most of the modules that are initialized in hostapd_setup_bss() are
 343  * deinitialized here.
 344  */
 345 static void hostapd_cleanup(struct hostapd_data *hapd)
 346 {
 347         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
 348                    hapd->conf->iface);
 349         if (hapd->iface->interfaces &&
 350             hapd->iface->interfaces->ctrl_iface_deinit)
 351                 hapd->iface->interfaces->ctrl_iface_deinit(hapd);
 352         hostapd_free_hapd_data(hapd);
 353 }
 354
 355
 356 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 357 {
 358         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 359 #ifdef CONFIG_IEEE80211N
 360 #ifdef NEED_AP_MLME
 361         hostapd_stop_setup_timers(iface);
 362 #endif /* NEED_AP_MLME */
 363 #endif /* CONFIG_IEEE80211N */
 364         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 365         iface->hw_features = NULL;
 366         os_free(iface->current_rates);
 367         iface->current_rates = NULL;
 368         os_free(iface->basic_rates);
 369         iface->basic_rates = NULL;
 370         ap_list_deinit(iface);
 371 }
 372
 373
 374 /**
 375  * hostapd_cleanup_iface - Complete per-interface cleanup
 376  * @iface: Pointer to interface data
 377  *
 378  * This function is called after per-BSS data structures are deinitialized
 379  * with hostapd_cleanup().
 380  */
 381 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 382 {
 383         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 384         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
 385
 386         hostapd_cleanup_iface_partial(iface);
 387         hostapd_config_free(iface->conf);
 388         iface->conf = NULL;
 389
 390         os_free(iface->config_fname);
 391         os_free(iface->bss);
 392         wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
 393         os_free(iface);
 394 }
 395
 396
 397 static void hostapd_clear_wep(struct hostapd_data *hapd)
 398 {
 399         if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
 400                 hostapd_set_privacy(hapd, 0);
 401                 hostapd_broadcast_wep_clear(hapd);
 402         }
 403 }
 404
 405
 406 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 407 {
 408         int i;
 409
 410         hostapd_broadcast_wep_set(hapd);
 411
 412         if (hapd->conf->ssid.wep.default_len) {
 413                 hostapd_set_privacy(hapd, 1);
 414                 return 0;
 415         }
 416
 417         /*
 418          * When IEEE 802.1X is not enabled, the driver may need to know how to
 419          * set authentication algorithms for static WEP.
 420          */
 421         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 422
 423         for (i = 0; i < 4; i++) {
 424                 if (hapd->conf->ssid.wep.key[i] &&
 425                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 426                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 427                                         hapd->conf->ssid.wep.key[i],
 428                                         hapd->conf->ssid.wep.len[i])) {
 429                         wpa_printf(MSG_WARNING, "Could not set WEP "
 430                                    "encryption.");
 431                         return -1;
 432                 }
 433                 if (hapd->conf->ssid.wep.key[i] &&
 434                     i == hapd->conf->ssid.wep.idx)
 435                         hostapd_set_privacy(hapd, 1);
 436         }
 437
 438         return 0;
 439 }
 440
 441
 442 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 443 {
 444         int ret = 0;
 445         u8 addr[ETH_ALEN];
 446
 447         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 448                 return 0;
 449
 450         if (!hapd->iface->driver_ap_teardown) {
 451                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 452                         "Flushing old station entries");
 453
 454                 if (hostapd_flush(hapd)) {
 455                         wpa_msg(hapd->msg_ctx, MSG_WARNING,
 456                                 "Could not connect to kernel driver");
 457                         ret = -1;
 458                 }
 459         }
 460         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 461         os_memset(addr, 0xff, ETH_ALEN);
 462         hostapd_drv_sta_deauth(hapd, addr, reason);
 463         hostapd_free_stas(hapd);
 464
 465         return ret;
 466 }
 467
 468
 469 static void hostapd_bss_deinit_no_free(struct hostapd_data *hapd)
 470 {
 471         hostapd_free_stas(hapd);
 472         hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
 473         hostapd_clear_wep(hapd);
 474 }
 475
 476
 477 /**
 478  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 479  * @iface: Pointer to interface data
 480  * Returns: 0 on success, -1 on failure
 481  *
 482  * This function is used to validate that the configured BSSIDs are valid.
 483  */
 484 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 485 {
 486         u8 mask[ETH_ALEN] = { 0 };
 487         struct hostapd_data *hapd = iface->bss[0];
 488         unsigned int i = iface->conf->num_bss, bits = 0, j;
 489         int auto_addr = 0;
 490
 491         if (hostapd_drv_none(hapd))
 492                 return 0;
 493
 494         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 495
 496         /* Determine the bits necessary to cover the number of BSSIDs. */
 497         for (i--; i; i >>= 1)
 498                 bits++;
 499
 500         /* Determine the bits necessary to any configured BSSIDs,
 501            if they are higher than the number of BSSIDs. */
 502         for (j = 0; j < iface->conf->num_bss; j++) {
 503                 if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
 504                         if (j)
 505                                 auto_addr++;
 506                         continue;
 507                 }
 508
 509                 for (i = 0; i < ETH_ALEN; i++) {
 510                         mask[i] |=
 511                                 iface->conf->bss[j]->bssid[i] ^
 512                                 hapd->own_addr[i];
 513                 }
 514         }
 515
 516         if (!auto_addr)
 517                 goto skip_mask_ext;
 518
 519         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 520                 ;
 521         j = 0;
 522         if (i < ETH_ALEN) {
 523                 j = (5 - i) * 8;
 524
 525                 while (mask[i] != 0) {
 526                         mask[i] >>= 1;
 527                         j++;
 528                 }
 529         }
 530
 531         if (bits < j)
 532                 bits = j;
 533
 534         if (bits > 40) {
 535                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 536                            bits);
 537                 return -1;
 538         }
 539
 540         os_memset(mask, 0xff, ETH_ALEN);
 541         j = bits / 8;
 542         for (i = 5; i > 5 - j; i--)
 543                 mask[i] = 0;
 544         j = bits % 8;
 545         while (j--)
 546                 mask[i] <<= 1;
 547
 548 skip_mask_ext:
 549         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 550                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 551
 552         if (!auto_addr)
 553                 return 0;
 554
 555         for (i = 0; i < ETH_ALEN; i++) {
 556                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 557                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 558                                    " for start address " MACSTR ".",
 559                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 560                         wpa_printf(MSG_ERROR, "Start address must be the "
 561                                    "first address in the block (i.e., addr "
 562                                    "AND mask == addr).");
 563                         return -1;
 564                 }
 565         }
 566
 567         return 0;
 568 }
 569
 570
 571 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 572 {
 573         size_t i;
 574
 575         for (i = 0; i < conf->num_bss; i++) {
 576                 if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
 577                         return 1;
 578                 }
 579         }
 580
 581         return 0;
 582 }
 583
 584
 585 #ifndef CONFIG_NO_RADIUS
 586
 587 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 588                                     struct radius_das_attrs *attr)
 589 {
 590         if (attr->nas_identifier &&
 591             (!hapd->conf->nas_identifier ||
 592              os_strlen(hapd->conf->nas_identifier) !=
 593              attr->nas_identifier_len ||
 594              os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
 595                        attr->nas_identifier_len) != 0)) {
 596                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
 597                 return 1;
 598         }
 599
 600         if (attr->nas_ip_addr &&
 601             (hapd->conf->own_ip_addr.af != AF_INET ||
 602              os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
 603              0)) {
 604                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
 605                 return 1;
 606         }
 607
 608 #ifdef CONFIG_IPV6
 609         if (attr->nas_ipv6_addr &&
 610             (hapd->conf->own_ip_addr.af != AF_INET6 ||
 611              os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
 612              != 0)) {
 613                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
 614                 return 1;
 615         }
 616 #endif /* CONFIG_IPV6 */
 617
 618         return 0;
 619 }
 620
 621
 622 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 623                                               struct radius_das_attrs *attr,
 624                                               int *multi)
 625 {
 626         struct sta_info *selected, *sta;
 627         char buf[128];
 628         int num_attr = 0;
 629         int count;
 630
 631         *multi = 0;
 632
 633         for (sta = hapd->sta_list; sta; sta = sta->next)
 634                 sta->radius_das_match = 1;
 635
 636         if (attr->sta_addr) {
 637                 num_attr++;
 638                 sta = ap_get_sta(hapd, attr->sta_addr);
 639                 if (!sta) {
 640                         wpa_printf(MSG_DEBUG,
 641                                    "RADIUS DAS: No Calling-Station-Id match");
 642                         return NULL;
 643                 }
 644
 645                 selected = sta;
 646                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 647                         if (sta != selected)
 648                                 sta->radius_das_match = 0;
 649                 }
 650                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Calling-Station-Id match");
 651         }
 652
 653         if (attr->acct_session_id) {
 654                 num_attr++;
 655                 if (attr->acct_session_id_len != 17) {
 656                         wpa_printf(MSG_DEBUG,
 657                                    "RADIUS DAS: Acct-Session-Id cannot match");
 658                         return NULL;
 659                 }
 660                 count = 0;
 661
 662                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 663                         if (!sta->radius_das_match)
 664                                 continue;
 665                         os_snprintf(buf, sizeof(buf), "%08X-%08X",
 666                                     sta->acct_session_id_hi,
 667                                     sta->acct_session_id_lo);
 668                         if (os_memcmp(attr->acct_session_id, buf, 17) != 0)
 669                                 sta->radius_das_match = 0;
 670                         else
 671                                 count++;
 672                 }
 673
 674                 if (count == 0) {
 675                         wpa_printf(MSG_DEBUG,
 676                                    "RADIUS DAS: No matches remaining after Acct-Session-Id check");
 677                         return NULL;
 678                 }
 679                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Acct-Session-Id match");
 680         }
 681
 682         if (attr->acct_multi_session_id) {
 683                 num_attr++;
 684                 if (attr->acct_multi_session_id_len != 17) {
 685                         wpa_printf(MSG_DEBUG,
 686                                    "RADIUS DAS: Acct-Multi-Session-Id cannot match");
 687                         return NULL;
 688                 }
 689                 count = 0;
 690
 691                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 692                         if (!sta->radius_das_match)
 693                                 continue;
 694                         if (!sta->eapol_sm ||
 695                             !sta->eapol_sm->acct_multi_session_id_hi) {
 696                                 sta->radius_das_match = 0;
 697                                 continue;
 698                         }
 699                         os_snprintf(buf, sizeof(buf), "%08X+%08X",
 700                                     sta->eapol_sm->acct_multi_session_id_hi,
 701                                     sta->eapol_sm->acct_multi_session_id_lo);
 702                         if (os_memcmp(attr->acct_multi_session_id, buf, 17) !=
 703                             0)
 704                                 sta->radius_das_match = 0;
 705                         else
 706                                 count++;
 707                 }
 708
 709                 if (count == 0) {
 710                         wpa_printf(MSG_DEBUG,
 711                                    "RADIUS DAS: No matches remaining after Acct-Multi-Session-Id check");
 712                         return NULL;
 713                 }
 714                 wpa_printf(MSG_DEBUG,
 715                            "RADIUS DAS: Acct-Multi-Session-Id match");
 716         }
 717
 718         if (attr->cui) {
 719                 num_attr++;
 720                 count = 0;
 721
 722                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 723                         struct wpabuf *cui;
 724
 725                         if (!sta->radius_das_match)
 726                                 continue;
 727                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 728                         if (!cui || wpabuf_len(cui) != attr->cui_len ||
 729                             os_memcmp(wpabuf_head(cui), attr->cui,
 730                                       attr->cui_len) != 0)
 731                                 sta->radius_das_match = 0;
 732                         else
 733                                 count++;
 734                 }
 735
 736                 if (count == 0) {
 737                         wpa_printf(MSG_DEBUG,
 738                                    "RADIUS DAS: No matches remaining after Chargeable-User-Identity check");
 739                         return NULL;
 740                 }
 741                 wpa_printf(MSG_DEBUG,
 742                            "RADIUS DAS: Chargeable-User-Identity match");
 743         }
 744
 745         if (attr->user_name) {
 746                 num_attr++;
 747                 count = 0;
 748
 749                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 750                         u8 *identity;
 751                         size_t identity_len;
 752
 753                         if (!sta->radius_das_match)
 754                                 continue;
 755                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 756                                                            &identity_len);
 757                         if (!identity ||
 758                             identity_len != attr->user_name_len ||
 759                             os_memcmp(identity, attr->user_name, identity_len)
 760                             != 0)
 761                                 sta->radius_das_match = 0;
 762                         else
 763                                 count++;
 764                 }
 765
 766                 if (count == 0) {
 767                         wpa_printf(MSG_DEBUG,
 768                                    "RADIUS DAS: No matches remaining after User-Name check");
 769                         return NULL;
 770                 }
 771                 wpa_printf(MSG_DEBUG,
 772                            "RADIUS DAS: User-Name match");
 773         }
 774
 775         if (num_attr == 0) {
 776                 /*
 777                  * In theory, we could match all current associations, but it
 778                  * seems safer to just reject requests that do not include any
 779                  * session identification attributes.
 780                  */
 781                 wpa_printf(MSG_DEBUG,
 782                            "RADIUS DAS: No session identification attributes included");
 783                 return NULL;
 784         }
 785
 786         selected = NULL;
 787         for (sta = hapd->sta_list; sta; sta = sta->next) {
 788                 if (sta->radius_das_match) {
 789                         if (selected) {
 790                                 *multi = 1;
 791                                 return NULL;
 792                         }
 793                         selected = sta;
 794                 }
 795         }
 796
 797         return selected;
 798 }
 799
 800
 801 static int hostapd_das_disconnect_pmksa(struct hostapd_data *hapd,
 802                                         struct radius_das_attrs *attr)
 803 {
 804         if (!hapd->wpa_auth)
 805                 return -1;
 806         return wpa_auth_radius_das_disconnect_pmksa(hapd->wpa_auth, attr);
 807 }
 808
 809
 810 static enum radius_das_res
 811 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 812 {
 813         struct hostapd_data *hapd = ctx;
 814         struct sta_info *sta;
 815         int multi;
 816
 817         if (hostapd_das_nas_mismatch(hapd, attr))
 818                 return RADIUS_DAS_NAS_MISMATCH;
 819
 820         sta = hostapd_das_find_sta(hapd, attr, &multi);
 821         if (sta == NULL) {
 822                 if (multi) {
 823                         wpa_printf(MSG_DEBUG,
 824                                    "RADIUS DAS: Multiple sessions match - not supported");
 825                         return RADIUS_DAS_MULTI_SESSION_MATCH;
 826                 }
 827                 if (hostapd_das_disconnect_pmksa(hapd, attr) == 0) {
 828                         wpa_printf(MSG_DEBUG,
 829                                    "RADIUS DAS: PMKSA cache entry matched");
 830                         return RADIUS_DAS_SUCCESS;
 831                 }
 832                 wpa_printf(MSG_DEBUG, "RADIUS DAS: No matching session found");
 833                 return RADIUS_DAS_SESSION_NOT_FOUND;
 834         }
 835
 836         wpa_printf(MSG_DEBUG, "RADIUS DAS: Found a matching session " MACSTR
 837                    " - disconnecting", MAC2STR(sta->addr));
 838         wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
 839
 840         hostapd_drv_sta_deauth(hapd, sta->addr,
 841                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 842         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 843
 844         return RADIUS_DAS_SUCCESS;
 845 }
 846
 847 #endif /* CONFIG_NO_RADIUS */
 848
 849
 850 /**
 851  * hostapd_setup_bss - Per-BSS setup (initialization)
 852  * @hapd: Pointer to BSS data
 853  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
 854  *      but interface may exist
 855  *
 856  * This function is used to initialize all per-BSS data structures and
 857  * resources. This gets called in a loop for each BSS when an interface is
 858  * initialized. Most of the modules that are initialized here will be
 859  * deinitialized in hostapd_cleanup().
 860  */
 861 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 862 {
 863         struct hostapd_bss_config *conf = hapd->conf;
 864         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 865         int ssid_len, set_ssid;
 866         char force_ifname[IFNAMSIZ];
 867         u8 if_addr[ETH_ALEN];
 868         int flush_old_stations = 1;
 869
 870         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 871                    __func__, hapd, conf->iface, first);
 872
 873 #ifdef EAP_SERVER_TNC
 874         if (conf->tnc && tncs_global_init() < 0) {
 875                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 876                 return -1;
 877         }
 878 #endif /* EAP_SERVER_TNC */
 879
 880         if (hapd->started) {
 881                 wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
 882                            __func__, conf->iface);
 883                 return -1;
 884         }
 885         hapd->started = 1;
 886
 887         if (!first || first == -1) {
 888                 if (hostapd_mac_comp_empty(conf->bssid) == 0) {
 889                         /* Allocate the next available BSSID. */
 890                         do {
 891                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 892                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 893                 } else {
 894                         /* Allocate the configured BSSID. */
 895                         os_memcpy(hapd->own_addr, conf->bssid, ETH_ALEN);
 896
 897                         if (hostapd_mac_comp(hapd->own_addr,
 898                                              hapd->iface->bss[0]->own_addr) ==
 899                             0) {
 900                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 901                                            "BSSID set to the MAC address of "
 902                                            "the radio", conf->iface);
 903                                 return -1;
 904                         }
 905                 }
 906
 907                 hapd->interface_added = 1;
 908                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 909                                    conf->iface, hapd->own_addr, hapd,
 910                                    &hapd->drv_priv, force_ifname, if_addr,
 911                                    conf->bridge[0] ? conf->bridge : NULL,
 912                                    first == -1)) {
 913                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 914                                    MACSTR ")", MAC2STR(hapd->own_addr));
 915                         hapd->interface_added = 0;
 916                         return -1;
 917                 }
 918         }
 919
 920         if (conf->wmm_enabled < 0)
 921                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 922
 923 #ifdef CONFIG_MESH
 924         if (hapd->iface->mconf == NULL)
 925                 flush_old_stations = 0;
 926 #endif /* CONFIG_MESH */
 927
 928         if (flush_old_stations)
 929                 hostapd_flush_old_stations(hapd,
 930                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 931         hostapd_set_privacy(hapd, 0);
 932
 933         hostapd_broadcast_wep_clear(hapd);
 934         if (hostapd_setup_encryption(conf->iface, hapd))
 935                 return -1;
 936
 937         /*
 938          * Fetch the SSID from the system and use it or,
 939          * if one was specified in the config file, verify they
 940          * match.
 941          */
 942         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 943         if (ssid_len < 0) {
 944                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 945                 return -1;
 946         }
 947         if (conf->ssid.ssid_set) {
 948                 /*
 949                  * If SSID is specified in the config file and it differs
 950                  * from what is being used then force installation of the
 951                  * new SSID.
 952                  */
 953                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 954                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 955         } else {
 956                 /*
 957                  * No SSID in the config file; just use the one we got
 958                  * from the system.
 959                  */
 960                 set_ssid = 0;
 961                 conf->ssid.ssid_len = ssid_len;
 962                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 963         }
 964
 965         if (!hostapd_drv_none(hapd)) {
 966                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 967                            " and ssid \"%s\"",
 968                            conf->iface, MAC2STR(hapd->own_addr),
 969                            wpa_ssid_txt(conf->ssid.ssid, conf->ssid.ssid_len));
 970         }
 971
 972         if (hostapd_setup_wpa_psk(conf)) {
 973                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 974                 return -1;
 975         }
 976
 977         /* Set SSID for the kernel driver (to be used in beacon and probe
 978          * response frames) */
 979         if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
 980                                          conf->ssid.ssid_len)) {
 981                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 982                 return -1;
 983         }
 984
 985         if (wpa_debug_level <= MSG_MSGDUMP)
 986                 conf->radius->msg_dumps = 1;
 987 #ifndef CONFIG_NO_RADIUS
 988         hapd->radius = radius_client_init(hapd, conf->radius);
 989         if (hapd->radius == NULL) {
 990                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 991                 return -1;
 992         }
 993
 994         if (conf->radius_das_port) {
 995                 struct radius_das_conf das_conf;
 996                 os_memset(&das_conf, 0, sizeof(das_conf));
 997                 das_conf.port = conf->radius_das_port;
 998                 das_conf.shared_secret = conf->radius_das_shared_secret;
 999                 das_conf.shared_secret_len =
1000                         conf->radius_das_shared_secret_len;
1001                 das_conf.client_addr = &conf->radius_das_client_addr;
1002                 das_conf.time_window = conf->radius_das_time_window;
1003                 das_conf.require_event_timestamp =
1004                         conf->radius_das_require_event_timestamp;
1005                 das_conf.ctx = hapd;
1006                 das_conf.disconnect = hostapd_das_disconnect;
1007                 hapd->radius_das = radius_das_init(&das_conf);
1008                 if (hapd->radius_das == NULL) {
1009                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
1010                                    "failed.");
1011                         return -1;
1012                 }
1013         }
1014 #endif /* CONFIG_NO_RADIUS */
1015
1016         if (hostapd_acl_init(hapd)) {
1017                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
1018                 return -1;
1019         }
1020         if (hostapd_init_wps(hapd, conf))
1021                 return -1;
1022
1023         if (authsrv_init(hapd) < 0)
1024                 return -1;
1025
1026         if (ieee802_1x_init(hapd)) {
1027                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
1028                 return -1;
1029         }
1030
1031         if ((conf->wpa || conf->osen) && hostapd_setup_wpa(hapd))
1032                 return -1;
1033
1034         if (accounting_init(hapd)) {
1035                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
1036                 return -1;
1037         }
1038
1039         if (conf->ieee802_11f &&
1040             (hapd->iapp = iapp_init(hapd, conf->iapp_iface)) == NULL) {
1041                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
1042                            "failed.");
1043                 return -1;
1044         }
1045
1046 #ifdef CONFIG_INTERWORKING
1047         if (gas_serv_init(hapd)) {
1048                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
1049                 return -1;
1050         }
1051
1052         if (conf->qos_map_set_len &&
1053             hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
1054                                     conf->qos_map_set_len)) {
1055                 wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
1056                 return -1;
1057         }
1058 #endif /* CONFIG_INTERWORKING */
1059
1060         if (conf->bss_load_update_period && bss_load_update_init(hapd)) {
1061                 wpa_printf(MSG_ERROR, "BSS Load initialization failed");
1062                 return -1;
1063         }
1064
1065         if (conf->proxy_arp) {
1066                 if (x_snoop_init(hapd)) {
1067                         wpa_printf(MSG_ERROR,
1068                                    "Generic snooping infrastructure initialization failed");
1069                         return -1;
1070                 }
1071
1072                 if (dhcp_snoop_init(hapd)) {
1073                         wpa_printf(MSG_ERROR,
1074                                    "DHCP snooping initialization failed");
1075                         return -1;
1076                 }
1077
1078                 if (ndisc_snoop_init(hapd)) {
1079                         wpa_printf(MSG_ERROR,
1080                                    "Neighbor Discovery snooping initialization failed");
1081                         return -1;
1082                 }
1083         }
1084
1085         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
1086                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
1087                 return -1;
1088         }
1089
1090         if (!conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
1091                 return -1;
1092
1093         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
1094                 return -1;
1095
1096         if (hapd->driver && hapd->driver->set_operstate)
1097                 hapd->driver->set_operstate(hapd->drv_priv, 1);
1098
1099         return 0;
1100 }
1101
1102
1103 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
1104 {
1105         struct hostapd_data *hapd = iface->bss[0];
1106         int i;
1107         struct hostapd_tx_queue_params *p;
1108
1109 #ifdef CONFIG_MESH
1110         if (iface->mconf == NULL)
1111                 return;
1112 #endif /* CONFIG_MESH */
1113
1114         for (i = 0; i < NUM_TX_QUEUES; i++) {
1115                 p = &iface->conf->tx_queue[i];
1116
1117                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
1118                                                 p->cwmax, p->burst)) {
1119                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
1120                                    "parameters for queue %d.", i);
1121                         /* Continue anyway */
1122                 }
1123         }
1124 }
1125
1126
1127 static int hostapd_set_acl_list(struct hostapd_data *hapd,
1128                                 struct mac_acl_entry *mac_acl,
1129                                 int n_entries, u8 accept_acl)
1130 {
1131         struct hostapd_acl_params *acl_params;
1132         int i, err;
1133
1134         acl_params = os_zalloc(sizeof(*acl_params) +
1135                                (n_entries * sizeof(acl_params->mac_acl[0])));
1136         if (!acl_params)
1137                 return -ENOMEM;
1138
1139         for (i = 0; i < n_entries; i++)
1140                 os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
1141                           ETH_ALEN);
1142
1143         acl_params->acl_policy = accept_acl;
1144         acl_params->num_mac_acl = n_entries;
1145
1146         err = hostapd_drv_set_acl(hapd, acl_params);
1147
1148         os_free(acl_params);
1149
1150         return err;
1151 }
1152
1153
1154 static void hostapd_set_acl(struct hostapd_data *hapd)
1155 {
1156         struct hostapd_config *conf = hapd->iconf;
1157         int err;
1158         u8 accept_acl;
1159
1160         if (hapd->iface->drv_max_acl_mac_addrs == 0)
1161                 return;
1162
1163         if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
1164                 accept_acl = 1;
1165                 err = hostapd_set_acl_list(hapd, conf->bss[0]->accept_mac,
1166                                            conf->bss[0]->num_accept_mac,
1167                                            accept_acl);
1168                 if (err) {
1169                         wpa_printf(MSG_DEBUG, "Failed to set accept acl");
1170                         return;
1171                 }
1172         } else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
1173                 accept_acl = 0;
1174                 err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
1175                                            conf->bss[0]->num_deny_mac,
1176                                            accept_acl);
1177                 if (err) {
1178                         wpa_printf(MSG_DEBUG, "Failed to set deny acl");
1179                         return;
1180                 }
1181         }
1182 }
1183
1184
1185 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
1186 {
1187         if (!hapd->iface->interfaces ||
1188             !hapd->iface->interfaces->ctrl_iface_init)
1189                 return 0;
1190
1191         if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
1192                 wpa_printf(MSG_ERROR,
1193                            "Failed to setup control interface for %s",
1194                            hapd->conf->iface);
1195                 return -1;
1196         }
1197
1198         return 0;
1199 }
1200
1201
1202 static int start_ctrl_iface(struct hostapd_iface *iface)
1203 {
1204         size_t i;
1205
1206         if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
1207                 return 0;
1208
1209         for (i = 0; i < iface->num_bss; i++) {
1210                 struct hostapd_data *hapd = iface->bss[i];
1211                 if (iface->interfaces->ctrl_iface_init(hapd)) {
1212                         wpa_printf(MSG_ERROR,
1213                                    "Failed to setup control interface for %s",
1214                                    hapd->conf->iface);
1215                         return -1;
1216                 }
1217         }
1218
1219         return 0;
1220 }
1221
1222
1223 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
1224 {
1225         struct hostapd_iface *iface = eloop_ctx;
1226
1227         if (!iface->wait_channel_update) {
1228                 wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
1229                 return;
1230         }
1231
1232         /*
1233          * It is possible that the existing channel list is acceptable, so try
1234          * to proceed.
1235          */
1236         wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
1237         setup_interface2(iface);
1238 }
1239
1240
1241 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1242 {
1243         if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1244                 return;
1245
1246         wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1247         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1248         setup_interface2(iface);
1249 }
1250
1251
1252 static int setup_interface(struct hostapd_iface *iface)
1253 {
1254         struct hostapd_data *hapd = iface->bss[0];
1255         size_t i;
1256
1257         /*
1258          * It is possible that setup_interface() is called after the interface
1259          * was disabled etc., in which case driver_ap_teardown is possibly set
1260          * to 1. Clear it here so any other key/station deletion, which is not
1261          * part of a teardown flow, would also call the relevant driver
1262          * callbacks.
1263          */
1264         iface->driver_ap_teardown = 0;
1265
1266         if (!iface->phy[0]) {
1267                 const char *phy = hostapd_drv_get_radio_name(hapd);
1268                 if (phy) {
1269                         wpa_printf(MSG_DEBUG, "phy: %s", phy);
1270                         os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1271                 }
1272         }
1273
1274         /*
1275          * Make sure that all BSSes get configured with a pointer to the same
1276          * driver interface.
1277          */
1278         for (i = 1; i < iface->num_bss; i++) {
1279                 iface->bss[i]->driver = hapd->driver;
1280                 iface->bss[i]->drv_priv = hapd->drv_priv;
1281         }
1282
1283         if (hostapd_validate_bssid_configuration(iface))
1284                 return -1;
1285
1286         /*
1287          * Initialize control interfaces early to allow external monitoring of
1288          * channel setup operations that may take considerable amount of time
1289          * especially for DFS cases.
1290          */
1291         if (start_ctrl_iface(iface))
1292                 return -1;
1293
1294         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1295                 char country[4], previous_country[4];
1296
1297                 hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1298                 if (hostapd_get_country(hapd, previous_country) < 0)
1299                         previous_country[0] = '\0';
1300
1301                 os_memcpy(country, hapd->iconf->country, 3);
1302                 country[3] = '\0';
1303                 if (hostapd_set_country(hapd, country) < 0) {
1304                         wpa_printf(MSG_ERROR, "Failed to set country code");
1305                         return -1;
1306                 }
1307
1308                 wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1309                            previous_country, country);
1310
1311                 if (os_strncmp(previous_country, country, 2) != 0) {
1312                         wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1313                         iface->wait_channel_update = 1;
1314                         eloop_register_timeout(5, 0,
1315                                                channel_list_update_timeout,
1316                                                iface, NULL);
1317                         return 0;
1318                 }
1319         }
1320
1321         return setup_interface2(iface);
1322 }
1323
1324
1325 static int setup_interface2(struct hostapd_iface *iface)
1326 {
1327         iface->wait_channel_update = 0;
1328
1329         if (hostapd_get_hw_features(iface)) {
1330                 /* Not all drivers support this yet, so continue without hw
1331                  * feature data. */
1332         } else {
1333                 int ret = hostapd_select_hw_mode(iface);
1334                 if (ret < 0) {
1335                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1336                                    "channel. (%d)", ret);
1337                         goto fail;
1338                 }
1339                 if (ret == 1) {
1340                         wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1341                         return 0;
1342                 }
1343                 ret = hostapd_check_ht_capab(iface);
1344                 if (ret < 0)
1345                         goto fail;
1346                 if (ret == 1) {
1347                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1348                                    "be completed in a callback");
1349                         return 0;
1350                 }
1351
1352                 if (iface->conf->ieee80211h)
1353                         wpa_printf(MSG_DEBUG, "DFS support is enabled");
1354         }
1355         return hostapd_setup_interface_complete(iface, 0);
1356
1357 fail:
1358         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1359         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1360         if (iface->interfaces && iface->interfaces->terminate_on_error)
1361                 eloop_terminate();
1362         return -1;
1363 }
1364
1365
1366 /**
1367  * hostapd_setup_interface_complete - Complete interface setup
1368  *
1369  * This function is called when previous steps in the interface setup has been
1370  * completed. This can also start operations, e.g., DFS, that will require
1371  * additional processing before interface is ready to be enabled. Such
1372  * operations will call this function from eloop callbacks when finished.
1373  */
1374 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1375 {
1376         struct hostapd_data *hapd = iface->bss[0];
1377         size_t j;
1378         u8 *prev_addr;
1379         int delay_apply_cfg = 0;
1380         int res_dfs_offload = 0;
1381
1382         if (err)
1383                 goto fail;
1384
1385         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1386         if (iface->conf->channel) {
1387 #ifdef NEED_AP_MLME
1388                 int res;
1389 #endif /* NEED_AP_MLME */
1390
1391                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1392                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1393                            "Frequency: %d MHz",
1394                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1395                            iface->conf->channel, iface->freq);
1396
1397 #ifdef NEED_AP_MLME
1398                 /* Handle DFS only if it is not offloaded to the driver */
1399                 if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
1400                         /* Check DFS */
1401                         res = hostapd_handle_dfs(iface);
1402                         if (res <= 0) {
1403                                 if (res < 0)
1404                                         goto fail;
1405                                 return res;
1406                         }
1407                 } else {
1408                         /* If DFS is offloaded to the driver */
1409                         res_dfs_offload = hostapd_handle_dfs_offload(iface);
1410                         if (res_dfs_offload <= 0) {
1411                                 if (res_dfs_offload < 0)
1412                                         goto fail;
1413                         } else {
1414                                 wpa_printf(MSG_DEBUG,
1415                                            "Proceed with AP/channel setup");
1416                                 /*
1417                                  * If this is a DFS channel, move to completing
1418                                  * AP setup.
1419                                  */
1420                                 if (res_dfs_offload == 1)
1421                                         goto dfs_offload;
1422                                 /* Otherwise fall through. */
1423                         }
1424                 }
1425 #endif /* NEED_AP_MLME */
1426
1427 #ifdef CONFIG_MESH
1428                 if (iface->mconf != NULL) {
1429                         wpa_printf(MSG_DEBUG,
1430                                    "%s: Mesh configuration will be applied while joining the mesh network",
1431                                    iface->bss[0]->conf->iface);
1432                         delay_apply_cfg = 1;
1433                 }
1434 #endif /* CONFIG_MESH */
1435
1436                 if (!delay_apply_cfg &&
1437                     hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1438                                      hapd->iconf->channel,
1439                                      hapd->iconf->ieee80211n,
1440                                      hapd->iconf->ieee80211ac,
1441                                      hapd->iconf->secondary_channel,
1442                                      hapd->iconf->vht_oper_chwidth,
1443                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1444                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1445                         wpa_printf(MSG_ERROR, "Could not set channel for "
1446                                    "kernel driver");
1447                         goto fail;
1448                 }
1449         }
1450
1451         if (iface->current_mode) {
1452                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1453                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1454                                    "table.");
1455                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1456                                        HOSTAPD_LEVEL_WARNING,
1457                                        "Failed to prepare rates table.");
1458                         goto fail;
1459                 }
1460         }
1461
1462         if (hapd->iconf->rts_threshold > -1 &&
1463             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1464                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1465                            "kernel driver");
1466                 goto fail;
1467         }
1468
1469         if (hapd->iconf->fragm_threshold > -1 &&
1470             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1471                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1472                            "for kernel driver");
1473                 goto fail;
1474         }
1475
1476         prev_addr = hapd->own_addr;
1477
1478         for (j = 0; j < iface->num_bss; j++) {
1479                 hapd = iface->bss[j];
1480                 if (j)
1481                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1482                 if (hostapd_setup_bss(hapd, j == 0)) {
1483                         do {
1484                                 hapd = iface->bss[j];
1485                                 hostapd_bss_deinit_no_free(hapd);
1486                                 hostapd_free_hapd_data(hapd);
1487                         } while (j-- > 0);
1488                         goto fail;
1489                 }
1490                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1491                         prev_addr = hapd->own_addr;
1492         }
1493         hapd = iface->bss[0];
1494
1495         hostapd_tx_queue_params(iface);
1496
1497         ap_list_init(iface);
1498
1499         hostapd_set_acl(hapd);
1500
1501         if (hostapd_driver_commit(hapd) < 0) {
1502                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1503                            "configuration", __func__);
1504                 goto fail;
1505         }
1506
1507         /*
1508          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1509          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1510          * mode), the interface is up only after driver_commit, so initialize
1511          * WPS after driver_commit.
1512          */
1513         for (j = 0; j < iface->num_bss; j++) {
1514                 if (hostapd_init_wps_complete(iface->bss[j]))
1515                         goto fail;
1516         }
1517
1518         if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
1519             !res_dfs_offload) {
1520                 /*
1521                  * If freq is DFS, and DFS is offloaded to the driver, then wait
1522                  * for CAC to complete.
1523                  */
1524                 wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
1525                 return res_dfs_offload;
1526         }
1527
1528 #ifdef NEED_AP_MLME
1529 dfs_offload:
1530 #endif /* NEED_AP_MLME */
1531         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1532         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1533         if (hapd->setup_complete_cb)
1534                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1535
1536         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1537                    iface->bss[0]->conf->iface);
1538         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1539                 iface->interfaces->terminate_on_error--;
1540
1541         return 0;
1542
1543 fail:
1544         wpa_printf(MSG_ERROR, "Interface initialization failed");
1545         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1546         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1547         if (iface->interfaces && iface->interfaces->terminate_on_error)
1548                 eloop_terminate();
1549         return -1;
1550 }
1551
1552
1553 /**
1554  * hostapd_setup_interface - Setup of an interface
1555  * @iface: Pointer to interface data.
1556  * Returns: 0 on success, -1 on failure
1557  *
1558  * Initializes the driver interface, validates the configuration,
1559  * and sets driver parameters based on the configuration.
1560  * Flushes old stations, sets the channel, encryption,
1561  * beacons, and WDS links based on the configuration.
1562  *
1563  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1564  * or DFS operations, this function returns 0 before such operations have been
1565  * completed. The pending operations are registered into eloop and will be
1566  * completed from eloop callbacks. Those callbacks end up calling
1567  * hostapd_setup_interface_complete() once setup has been completed.
1568  */
1569 int hostapd_setup_interface(struct hostapd_iface *iface)
1570 {
1571         int ret;
1572
1573         ret = setup_interface(iface);
1574         if (ret) {
1575                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1576                            iface->bss[0]->conf->iface);
1577                 return -1;
1578         }
1579
1580         return 0;
1581 }
1582
1583
1584 /**
1585  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1586  * @hapd_iface: Pointer to interface data
1587  * @conf: Pointer to per-interface configuration
1588  * @bss: Pointer to per-BSS configuration for this BSS
1589  * Returns: Pointer to allocated BSS data
1590  *
1591  * This function is used to allocate per-BSS data structure. This data will be
1592  * freed after hostapd_cleanup() is called for it during interface
1593  * deinitialization.
1594  */
1595 struct hostapd_data *
1596 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1597                        struct hostapd_config *conf,
1598                        struct hostapd_bss_config *bss)
1599 {
1600         struct hostapd_data *hapd;
1601
1602         hapd = os_zalloc(sizeof(*hapd));
1603         if (hapd == NULL)
1604                 return NULL;
1605
1606         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1607         hapd->iconf = conf;
1608         hapd->conf = bss;
1609         hapd->iface = hapd_iface;
1610         hapd->driver = hapd->iconf->driver;
1611         hapd->ctrl_sock = -1;
1612
1613         return hapd;
1614 }
1615
1616
1617 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1618 {
1619         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1620                    hapd->conf->iface);
1621         hostapd_bss_deinit_no_free(hapd);
1622         hostapd_cleanup(hapd);
1623 }
1624
1625
1626 void hostapd_interface_deinit(struct hostapd_iface *iface)
1627 {
1628         int j;
1629
1630         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1631         if (iface == NULL)
1632                 return;
1633
1634 #ifdef CONFIG_IEEE80211N
1635 #ifdef NEED_AP_MLME
1636         hostapd_stop_setup_timers(iface);
1637         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
1638 #endif /* NEED_AP_MLME */
1639 #endif /* CONFIG_IEEE80211N */
1640         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1641         iface->wait_channel_update = 0;
1642
1643         for (j = iface->num_bss - 1; j >= 0; j--)
1644                 hostapd_bss_deinit(iface->bss[j]);
1645 }
1646
1647
1648 void hostapd_interface_free(struct hostapd_iface *iface)
1649 {
1650         size_t j;
1651         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1652         for (j = 0; j < iface->num_bss; j++) {
1653                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1654                            __func__, iface->bss[j]);
1655                 os_free(iface->bss[j]);
1656         }
1657         hostapd_cleanup_iface(iface);
1658 }
1659
1660
1661 /**
1662  * hostapd_init - Allocate and initialize per-interface data
1663  * @config_file: Path to the configuration file
1664  * Returns: Pointer to the allocated interface data or %NULL on failure
1665  *
1666  * This function is used to allocate main data structures for per-interface
1667  * data. The allocated data buffer will be freed by calling
1668  * hostapd_cleanup_iface().
1669  */
1670 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1671                                     const char *config_file)
1672 {
1673         struct hostapd_iface *hapd_iface = NULL;
1674         struct hostapd_config *conf = NULL;
1675         struct hostapd_data *hapd;
1676         size_t i;
1677
1678         hapd_iface = os_zalloc(sizeof(*hapd_iface));
1679         if (hapd_iface == NULL)
1680                 goto fail;
1681
1682         hapd_iface->config_fname = os_strdup(config_file);
1683         if (hapd_iface->config_fname == NULL)
1684                 goto fail;
1685
1686         conf = interfaces->config_read_cb(hapd_iface->config_fname);
1687         if (conf == NULL)
1688                 goto fail;
1689         hapd_iface->conf = conf;
1690
1691         hapd_iface->num_bss = conf->num_bss;
1692         hapd_iface->bss = os_calloc(conf->num_bss,
1693                                     sizeof(struct hostapd_data *));
1694         if (hapd_iface->bss == NULL)
1695                 goto fail;
1696
1697         for (i = 0; i < conf->num_bss; i++) {
1698                 hapd = hapd_iface->bss[i] =
1699                         hostapd_alloc_bss_data(hapd_iface, conf,
1700                                                conf->bss[i]);
1701                 if (hapd == NULL)
1702                         goto fail;
1703                 hapd->msg_ctx = hapd;
1704         }
1705
1706         return hapd_iface;
1707
1708 fail:
1709         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1710                    config_file);
1711         if (conf)
1712                 hostapd_config_free(conf);
1713         if (hapd_iface) {
1714                 os_free(hapd_iface->config_fname);
1715                 os_free(hapd_iface->bss);
1716                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1717                            __func__, hapd_iface);
1718                 os_free(hapd_iface);
1719         }
1720         return NULL;
1721 }
1722
1723
1724 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1725 {
1726         size_t i, j;
1727
1728         for (i = 0; i < interfaces->count; i++) {
1729                 struct hostapd_iface *iface = interfaces->iface[i];
1730                 for (j = 0; j < iface->num_bss; j++) {
1731                         struct hostapd_data *hapd = iface->bss[j];
1732                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
1733                                 return 1;
1734                 }
1735         }
1736
1737         return 0;
1738 }
1739
1740
1741 /**
1742  * hostapd_interface_init_bss - Read configuration file and init BSS data
1743  *
1744  * This function is used to parse configuration file for a BSS. This BSS is
1745  * added to an existing interface sharing the same radio (if any) or a new
1746  * interface is created if this is the first interface on a radio. This
1747  * allocate memory for the BSS. No actual driver operations are started.
1748  *
1749  * This is similar to hostapd_interface_init(), but for a case where the
1750  * configuration is used to add a single BSS instead of all BSSes for a radio.
1751  */
1752 struct hostapd_iface *
1753 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
1754                            const char *config_fname, int debug)
1755 {
1756         struct hostapd_iface *new_iface = NULL, *iface = NULL;
1757         struct hostapd_data *hapd;
1758         int k;
1759         size_t i, bss_idx;
1760
1761         if (!phy || !*phy)
1762                 return NULL;
1763
1764         for (i = 0; i < interfaces->count; i++) {
1765                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
1766                         iface = interfaces->iface[i];
1767                         break;
1768                 }
1769         }
1770
1771         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
1772                    config_fname, phy, iface ? "" : " --> new PHY");
1773         if (iface) {
1774                 struct hostapd_config *conf;
1775                 struct hostapd_bss_config **tmp_conf;
1776                 struct hostapd_data **tmp_bss;
1777                 struct hostapd_bss_config *bss;
1778                 const char *ifname;
1779
1780                 /* Add new BSS to existing iface */
1781                 conf = interfaces->config_read_cb(config_fname);
1782                 if (conf == NULL)
1783                         return NULL;
1784                 if (conf->num_bss > 1) {
1785                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
1786                         hostapd_config_free(conf);
1787                         return NULL;
1788                 }
1789
1790                 ifname = conf->bss[0]->iface;
1791                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
1792                         wpa_printf(MSG_ERROR,
1793                                    "Interface name %s already in use", ifname);
1794                         hostapd_config_free(conf);
1795                         return NULL;
1796                 }
1797
1798                 tmp_conf = os_realloc_array(
1799                         iface->conf->bss, iface->conf->num_bss + 1,
1800                         sizeof(struct hostapd_bss_config *));
1801                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
1802                                            sizeof(struct hostapd_data *));
1803                 if (tmp_bss)
1804                         iface->bss = tmp_bss;
1805                 if (tmp_conf) {
1806                         iface->conf->bss = tmp_conf;
1807                         iface->conf->last_bss = tmp_conf[0];
1808                 }
1809                 if (tmp_bss == NULL || tmp_conf == NULL) {
1810                         hostapd_config_free(conf);
1811                         return NULL;
1812                 }
1813                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
1814                 iface->conf->num_bss++;
1815
1816                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
1817                 if (hapd == NULL) {
1818                         iface->conf->num_bss--;
1819                         hostapd_config_free(conf);
1820                         return NULL;
1821                 }
1822                 iface->conf->last_bss = bss;
1823                 iface->bss[iface->num_bss] = hapd;
1824                 hapd->msg_ctx = hapd;
1825
1826                 bss_idx = iface->num_bss++;
1827                 conf->num_bss--;
1828                 conf->bss[0] = NULL;
1829                 hostapd_config_free(conf);
1830         } else {
1831                 /* Add a new iface with the first BSS */
1832                 new_iface = iface = hostapd_init(interfaces, config_fname);
1833                 if (!iface)
1834                         return NULL;
1835                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1836                 iface->interfaces = interfaces;
1837                 bss_idx = 0;
1838         }
1839
1840         for (k = 0; k < debug; k++) {
1841                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
1842                         iface->bss[bss_idx]->conf->logger_stdout_level--;
1843         }
1844
1845         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
1846             !hostapd_drv_none(iface->bss[bss_idx])) {
1847                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
1848                            config_fname);
1849                 if (new_iface)
1850                         hostapd_interface_deinit_free(new_iface);
1851                 return NULL;
1852         }
1853
1854         return iface;
1855 }
1856
1857
1858 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
1859 {
1860         const struct wpa_driver_ops *driver;
1861         void *drv_priv;
1862
1863         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1864         if (iface == NULL)
1865                 return;
1866         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
1867                    __func__, (unsigned int) iface->num_bss,
1868                    (unsigned int) iface->conf->num_bss);
1869         driver = iface->bss[0]->driver;
1870         drv_priv = iface->bss[0]->drv_priv;
1871         hostapd_interface_deinit(iface);
1872         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1873                    __func__, driver, drv_priv);
1874         if (driver && driver->hapd_deinit && drv_priv) {
1875                 driver->hapd_deinit(drv_priv);
1876                 iface->bss[0]->drv_priv = NULL;
1877         }
1878         hostapd_interface_free(iface);
1879 }
1880
1881
1882 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
1883                                   void *drv_priv,
1884                                   struct hostapd_iface *hapd_iface)
1885 {
1886         size_t j;
1887
1888         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1889                    __func__, driver, drv_priv);
1890         if (driver && driver->hapd_deinit && drv_priv) {
1891                 driver->hapd_deinit(drv_priv);
1892                 for (j = 0; j < hapd_iface->num_bss; j++) {
1893                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
1894                                    __func__, (int) j,
1895                                    hapd_iface->bss[j]->drv_priv);
1896                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
1897                                 hapd_iface->bss[j]->drv_priv = NULL;
1898                 }
1899         }
1900 }
1901
1902
1903 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
1904 {
1905         size_t j;
1906
1907         if (hapd_iface->bss[0]->drv_priv != NULL) {
1908                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
1909                            hapd_iface->conf->bss[0]->iface);
1910                 return -1;
1911         }
1912
1913         wpa_printf(MSG_DEBUG, "Enable interface %s",
1914                    hapd_iface->conf->bss[0]->iface);
1915
1916         for (j = 0; j < hapd_iface->num_bss; j++)
1917                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
1918         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1919                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
1920                 return -1;
1921         }
1922
1923         if (hapd_iface->interfaces == NULL ||
1924             hapd_iface->interfaces->driver_init == NULL ||
1925             hapd_iface->interfaces->driver_init(hapd_iface))
1926                 return -1;
1927
1928         if (hostapd_setup_interface(hapd_iface)) {
1929                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
1930                                       hapd_iface->bss[0]->drv_priv,
1931                                       hapd_iface);
1932                 return -1;
1933         }
1934
1935         return 0;
1936 }
1937
1938
1939 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
1940 {
1941         size_t j;
1942
1943         wpa_printf(MSG_DEBUG, "Reload interface %s",
1944                    hapd_iface->conf->bss[0]->iface);
1945         for (j = 0; j < hapd_iface->num_bss; j++)
1946                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
1947         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1948                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
1949                 return -1;
1950         }
1951         hostapd_clear_old(hapd_iface);
1952         for (j = 0; j < hapd_iface->num_bss; j++)
1953                 hostapd_reload_bss(hapd_iface->bss[j]);
1954
1955         return 0;
1956 }
1957
1958
1959 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
1960 {
1961         size_t j;
1962         const struct wpa_driver_ops *driver;
1963         void *drv_priv;
1964
1965         if (hapd_iface == NULL)
1966                 return -1;
1967
1968         if (hapd_iface->bss[0]->drv_priv == NULL) {
1969                 wpa_printf(MSG_INFO, "Interface %s already disabled",
1970                            hapd_iface->conf->bss[0]->iface);
1971                 return -1;
1972         }
1973
1974         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1975         driver = hapd_iface->bss[0]->driver;
1976         drv_priv = hapd_iface->bss[0]->drv_priv;
1977
1978         hapd_iface->driver_ap_teardown =
1979                 !!(hapd_iface->drv_flags &
1980                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
1981
1982         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
1983         for (j = 0; j < hapd_iface->num_bss; j++) {
1984                 struct hostapd_data *hapd = hapd_iface->bss[j];
1985                 hostapd_bss_deinit_no_free(hapd);
1986                 hostapd_free_hapd_data(hapd);
1987         }
1988
1989         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
1990
1991         /* From hostapd_cleanup_iface: These were initialized in
1992          * hostapd_setup_interface and hostapd_setup_interface_complete
1993          */
1994         hostapd_cleanup_iface_partial(hapd_iface);
1995
1996         wpa_printf(MSG_DEBUG, "Interface %s disabled",
1997                    hapd_iface->bss[0]->conf->iface);
1998         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
1999         return 0;
2000 }
2001
2002
2003 static struct hostapd_iface *
2004 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
2005 {
2006         struct hostapd_iface **iface, *hapd_iface;
2007
2008         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
2009                                  sizeof(struct hostapd_iface *));
2010         if (iface == NULL)
2011                 return NULL;
2012         interfaces->iface = iface;
2013         hapd_iface = interfaces->iface[interfaces->count] =
2014                 os_zalloc(sizeof(*hapd_iface));
2015         if (hapd_iface == NULL) {
2016                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2017                            "the interface", __func__);
2018                 return NULL;
2019         }
2020         interfaces->count++;
2021         hapd_iface->interfaces = interfaces;
2022
2023         return hapd_iface;
2024 }
2025
2026
2027 static struct hostapd_config *
2028 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
2029                      const char *ctrl_iface)
2030 {
2031         struct hostapd_bss_config *bss;
2032         struct hostapd_config *conf;
2033
2034         /* Allocates memory for bss and conf */
2035         conf = hostapd_config_defaults();
2036         if (conf == NULL) {
2037                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2038                                 "configuration", __func__);
2039                 return NULL;
2040         }
2041
2042         conf->driver = wpa_drivers[0];
2043         if (conf->driver == NULL) {
2044                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
2045                 hostapd_config_free(conf);
2046                 return NULL;
2047         }
2048
2049         bss = conf->last_bss = conf->bss[0];
2050
2051         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
2052         bss->ctrl_interface = os_strdup(ctrl_iface);
2053         if (bss->ctrl_interface == NULL) {
2054                 hostapd_config_free(conf);
2055                 return NULL;
2056         }
2057
2058         /* Reading configuration file skipped, will be done in SET!
2059          * From reading the configuration till the end has to be done in
2060          * SET
2061          */
2062         return conf;
2063 }
2064
2065
2066 static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
2067                               struct hostapd_config *conf)
2068 {
2069         size_t i;
2070         struct hostapd_data *hapd;
2071
2072         hapd_iface->bss = os_calloc(conf->num_bss,
2073                                     sizeof(struct hostapd_data *));
2074         if (hapd_iface->bss == NULL)
2075                 return -1;
2076
2077         for (i = 0; i < conf->num_bss; i++) {
2078                 hapd = hapd_iface->bss[i] =
2079                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
2080                 if (hapd == NULL) {
2081                         while (i > 0) {
2082                                 i--;
2083                                 os_free(hapd_iface->bss[i]);
2084                                 hapd_iface->bss[i] = NULL;
2085                         }
2086                         os_free(hapd_iface->bss);
2087                         hapd_iface->bss = NULL;
2088                         return -1;
2089                 }
2090                 hapd->msg_ctx = hapd;
2091         }
2092
2093         hapd_iface->conf = conf;
2094         hapd_iface->num_bss = conf->num_bss;
2095
2096         return 0;
2097 }
2098
2099
2100 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
2101 {
2102         struct hostapd_config *conf = NULL;
2103         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
2104         struct hostapd_data *hapd;
2105         char *ptr;
2106         size_t i, j;
2107         const char *conf_file = NULL, *phy_name = NULL;
2108
2109         if (os_strncmp(buf, "bss_config=", 11) == 0) {
2110                 char *pos;
2111                 phy_name = buf + 11;
2112                 pos = os_strchr(phy_name, ':');
2113                 if (!pos)
2114                         return -1;
2115                 *pos++ = '\0';
2116                 conf_file = pos;
2117                 if (!os_strlen(conf_file))
2118                         return -1;
2119
2120                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
2121                                                         conf_file, 0);
2122                 if (!hapd_iface)
2123                         return -1;
2124                 for (j = 0; j < interfaces->count; j++) {
2125                         if (interfaces->iface[j] == hapd_iface)
2126                                 break;
2127                 }
2128                 if (j == interfaces->count) {
2129                         struct hostapd_iface **tmp;
2130                         tmp = os_realloc_array(interfaces->iface,
2131                                                interfaces->count + 1,
2132                                                sizeof(struct hostapd_iface *));
2133                         if (!tmp) {
2134                                 hostapd_interface_deinit_free(hapd_iface);
2135                                 return -1;
2136                         }
2137                         interfaces->iface = tmp;
2138                         interfaces->iface[interfaces->count++] = hapd_iface;
2139                         new_iface = hapd_iface;
2140                 }
2141
2142                 if (new_iface) {
2143                         if (interfaces->driver_init(hapd_iface))
2144                                 goto fail;
2145
2146                         if (hostapd_setup_interface(hapd_iface)) {
2147                                 hostapd_deinit_driver(
2148                                         hapd_iface->bss[0]->driver,
2149                                         hapd_iface->bss[0]->drv_priv,
2150                                         hapd_iface);
2151                                 goto fail;
2152                         }
2153                 } else {
2154                         /* Assign new BSS with bss[0]'s driver info */
2155                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
2156                         hapd->driver = hapd_iface->bss[0]->driver;
2157                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
2158                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
2159                                   ETH_ALEN);
2160
2161                         if (start_ctrl_iface_bss(hapd) < 0 ||
2162                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
2163                              hostapd_setup_bss(hapd, -1))) {
2164                                 hostapd_cleanup(hapd);
2165                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
2166                                 hapd_iface->conf->num_bss--;
2167                                 hapd_iface->num_bss--;
2168                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
2169                                            __func__, hapd, hapd->conf->iface);
2170                                 hostapd_config_free_bss(hapd->conf);
2171                                 hapd->conf = NULL;
2172                                 os_free(hapd);
2173                                 return -1;
2174                         }
2175                 }
2176                 return 0;
2177         }
2178
2179         ptr = os_strchr(buf, ' ');
2180         if (ptr == NULL)
2181                 return -1;
2182         *ptr++ = '\0';
2183
2184         if (os_strncmp(ptr, "config=", 7) == 0)
2185                 conf_file = ptr + 7;
2186
2187         for (i = 0; i < interfaces->count; i++) {
2188                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
2189                                buf)) {
2190                         wpa_printf(MSG_INFO, "Cannot add interface - it "
2191                                    "already exists");
2192                         return -1;
2193                 }
2194         }
2195
2196         hapd_iface = hostapd_iface_alloc(interfaces);
2197         if (hapd_iface == NULL) {
2198                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2199                            "for interface", __func__);
2200                 goto fail;
2201         }
2202         new_iface = hapd_iface;
2203
2204         if (conf_file && interfaces->config_read_cb) {
2205                 conf = interfaces->config_read_cb(conf_file);
2206                 if (conf && conf->bss)
2207                         os_strlcpy(conf->bss[0]->iface, buf,
2208                                    sizeof(conf->bss[0]->iface));
2209         } else
2210                 conf = hostapd_config_alloc(interfaces, buf, ptr);
2211         if (conf == NULL || conf->bss == NULL) {
2212                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2213                            "for configuration", __func__);
2214                 goto fail;
2215         }
2216
2217         if (hostapd_data_alloc(hapd_iface, conf) < 0) {
2218                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2219                            "for hostapd", __func__);
2220                 goto fail;
2221         }
2222         conf = NULL;
2223
2224         if (start_ctrl_iface(hapd_iface) < 0)
2225                 goto fail;
2226
2227         wpa_printf(MSG_INFO, "Add interface '%s'",
2228                    hapd_iface->conf->bss[0]->iface);
2229
2230         return 0;
2231
2232 fail:
2233         if (conf)
2234                 hostapd_config_free(conf);
2235         if (hapd_iface) {
2236                 if (hapd_iface->bss) {
2237                         for (i = 0; i < hapd_iface->num_bss; i++) {
2238                                 hapd = hapd_iface->bss[i];
2239                                 if (!hapd)
2240                                         continue;
2241                                 if (hapd_iface->interfaces &&
2242                                     hapd_iface->interfaces->ctrl_iface_deinit)
2243                                         hapd_iface->interfaces->
2244                                                 ctrl_iface_deinit(hapd);
2245                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2246                                            __func__, hapd_iface->bss[i],
2247                                            hapd->conf->iface);
2248                                 hostapd_cleanup(hapd);
2249                                 os_free(hapd);
2250                                 hapd_iface->bss[i] = NULL;
2251                         }
2252                         os_free(hapd_iface->bss);
2253                         hapd_iface->bss = NULL;
2254                 }
2255                 if (new_iface) {
2256                         interfaces->count--;
2257                         interfaces->iface[interfaces->count] = NULL;
2258                 }
2259                 hostapd_cleanup_iface(hapd_iface);
2260         }
2261         return -1;
2262 }
2263
2264
2265 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
2266 {
2267         size_t i;
2268
2269         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
2270
2271         /* Remove hostapd_data only if it has already been initialized */
2272         if (idx < iface->num_bss) {
2273                 struct hostapd_data *hapd = iface->bss[idx];
2274
2275                 hostapd_bss_deinit(hapd);
2276                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2277                            __func__, hapd, hapd->conf->iface);
2278                 hostapd_config_free_bss(hapd->conf);
2279                 hapd->conf = NULL;
2280                 os_free(hapd);
2281
2282                 iface->num_bss--;
2283
2284                 for (i = idx; i < iface->num_bss; i++)
2285                         iface->bss[i] = iface->bss[i + 1];
2286         } else {
2287                 hostapd_config_free_bss(iface->conf->bss[idx]);
2288                 iface->conf->bss[idx] = NULL;
2289         }
2290
2291         iface->conf->num_bss--;
2292         for (i = idx; i < iface->conf->num_bss; i++)
2293                 iface->conf->bss[i] = iface->conf->bss[i + 1];
2294
2295         return 0;
2296 }
2297
2298
2299 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2300 {
2301         struct hostapd_iface *hapd_iface;
2302         size_t i, j, k = 0;
2303
2304         for (i = 0; i < interfaces->count; i++) {
2305                 hapd_iface = interfaces->iface[i];
2306                 if (hapd_iface == NULL)
2307                         return -1;
2308                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2309                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2310                         hapd_iface->driver_ap_teardown =
2311                                 !!(hapd_iface->drv_flags &
2312                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2313
2314                         hostapd_interface_deinit_free(hapd_iface);
2315                         k = i;
2316                         while (k < (interfaces->count - 1)) {
2317                                 interfaces->iface[k] =
2318                                         interfaces->iface[k + 1];
2319                                 k++;
2320                         }
2321                         interfaces->count--;
2322                         return 0;
2323                 }
2324
2325                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2326                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2327                                 hapd_iface->driver_ap_teardown =
2328                                         !(hapd_iface->drv_flags &
2329                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2330                                 return hostapd_remove_bss(hapd_iface, j);
2331                         }
2332                 }
2333         }
2334         return -1;
2335 }
2336
2337
2338 /**
2339  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2340  * @hapd: Pointer to BSS data
2341  * @sta: Pointer to the associated STA data
2342  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2343  *
2344  * This function will be called whenever a station associates with the AP. It
2345  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2346  * from drv_callbacks.c based on driver events for drivers that take care of
2347  * management frames (IEEE 802.11 authentication and association) internally.
2348  */
2349 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2350                            int reassoc)
2351 {
2352         if (hapd->tkip_countermeasures) {
2353                 hostapd_drv_sta_deauth(hapd, sta->addr,
2354                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2355                 return;
2356         }
2357
2358         hostapd_prune_associations(hapd, sta->addr);
2359
2360         /* IEEE 802.11F (IAPP) */
2361         if (hapd->conf->ieee802_11f)
2362                 iapp_new_station(hapd->iapp, sta);
2363
2364 #ifdef CONFIG_P2P
2365         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2366                 sta->no_p2p_set = 1;
2367                 hapd->num_sta_no_p2p++;
2368                 if (hapd->num_sta_no_p2p == 1)
2369                         hostapd_p2p_non_p2p_sta_connected(hapd);
2370         }
2371 #endif /* CONFIG_P2P */
2372
2373         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2374          * IEEE 802.1X/WPA code will start accounting after the station has
2375          * been authorized. */
2376         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2377                 ap_sta_set_authorized(hapd, sta, 1);
2378                 os_get_reltime(&sta->connected_time);
2379                 accounting_sta_start(hapd, sta);
2380         }
2381
2382         /* Start IEEE 802.1X authentication process for new stations */
2383         ieee802_1x_new_station(hapd, sta);
2384         if (reassoc) {
2385                 if (sta->auth_alg != WLAN_AUTH_FT &&
2386                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2387                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2388         } else
2389                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2390
2391         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2392                 wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
2393                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
2394                            __func__, MAC2STR(sta->addr),
2395                            hapd->conf->ap_max_inactivity);
2396                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2397                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2398                                        ap_handle_timer, hapd, sta);
2399         }
2400 }
2401
2402
2403 const char * hostapd_state_text(enum hostapd_iface_state s)
2404 {
2405         switch (s) {
2406         case HAPD_IFACE_UNINITIALIZED:
2407                 return "UNINITIALIZED";
2408         case HAPD_IFACE_DISABLED:
2409                 return "DISABLED";
2410         case HAPD_IFACE_COUNTRY_UPDATE:
2411                 return "COUNTRY_UPDATE";
2412         case HAPD_IFACE_ACS:
2413                 return "ACS";
2414         case HAPD_IFACE_HT_SCAN:
2415                 return "HT_SCAN";
2416         case HAPD_IFACE_DFS:
2417                 return "DFS";
2418         case HAPD_IFACE_ENABLED:
2419                 return "ENABLED";
2420         }
2421
2422         return "UNKNOWN";
2423 }
2424
2425
2426 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2427 {
2428         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2429                    iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2430                    hostapd_state_text(s));
2431         iface->state = s;
2432 }
2433
2434
2435 #ifdef NEED_AP_MLME
2436
2437 static void free_beacon_data(struct beacon_data *beacon)
2438 {
2439         os_free(beacon->head);
2440         beacon->head = NULL;
2441         os_free(beacon->tail);
2442         beacon->tail = NULL;
2443         os_free(beacon->probe_resp);
2444         beacon->probe_resp = NULL;
2445         os_free(beacon->beacon_ies);
2446         beacon->beacon_ies = NULL;
2447         os_free(beacon->proberesp_ies);
2448         beacon->proberesp_ies = NULL;
2449         os_free(beacon->assocresp_ies);
2450         beacon->assocresp_ies = NULL;
2451 }
2452
2453
2454 static int hostapd_build_beacon_data(struct hostapd_data *hapd,
2455                                      struct beacon_data *beacon)
2456 {
2457         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2458         struct wpa_driver_ap_params params;
2459         int ret;
2460
2461         os_memset(beacon, 0, sizeof(*beacon));
2462         ret = ieee802_11_build_ap_params(hapd, &params);
2463         if (ret < 0)
2464                 return ret;
2465
2466         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2467                                          &proberesp_extra,
2468                                          &assocresp_extra);
2469         if (ret)
2470                 goto free_ap_params;
2471
2472         ret = -1;
2473         beacon->head = os_malloc(params.head_len);
2474         if (!beacon->head)
2475                 goto free_ap_extra_ies;
2476
2477         os_memcpy(beacon->head, params.head, params.head_len);
2478         beacon->head_len = params.head_len;
2479
2480         beacon->tail = os_malloc(params.tail_len);
2481         if (!beacon->tail)
2482                 goto free_beacon;
2483
2484         os_memcpy(beacon->tail, params.tail, params.tail_len);
2485         beacon->tail_len = params.tail_len;
2486
2487         if (params.proberesp != NULL) {
2488                 beacon->probe_resp = os_malloc(params.proberesp_len);
2489                 if (!beacon->probe_resp)
2490                         goto free_beacon;
2491
2492                 os_memcpy(beacon->probe_resp, params.proberesp,
2493                           params.proberesp_len);
2494                 beacon->probe_resp_len = params.proberesp_len;
2495         }
2496
2497         /* copy the extra ies */
2498         if (beacon_extra) {
2499                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2500                 if (!beacon->beacon_ies)
2501                         goto free_beacon;
2502
2503                 os_memcpy(beacon->beacon_ies,
2504                           beacon_extra->buf, wpabuf_len(beacon_extra));
2505                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2506         }
2507
2508         if (proberesp_extra) {
2509                 beacon->proberesp_ies =
2510                         os_malloc(wpabuf_len(proberesp_extra));
2511                 if (!beacon->proberesp_ies)
2512                         goto free_beacon;
2513
2514                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2515                           wpabuf_len(proberesp_extra));
2516                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2517         }
2518
2519         if (assocresp_extra) {
2520                 beacon->assocresp_ies =
2521                         os_malloc(wpabuf_len(assocresp_extra));
2522                 if (!beacon->assocresp_ies)
2523                         goto free_beacon;
2524
2525                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2526                           wpabuf_len(assocresp_extra));
2527                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2528         }
2529
2530         ret = 0;
2531 free_beacon:
2532         /* if the function fails, the caller should not free beacon data */
2533         if (ret)
2534                 free_beacon_data(beacon);
2535
2536 free_ap_extra_ies:
2537         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2538                                   assocresp_extra);
2539 free_ap_params:
2540         ieee802_11_free_ap_params(&params);
2541         return ret;
2542 }
2543
2544
2545 /*
2546  * TODO: This flow currently supports only changing frequency within the
2547  * same hw_mode. Any other changes to MAC parameters or provided settings (even
2548  * width) are not supported.
2549  */
2550 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2551                                       struct hostapd_config *conf,
2552                                       struct hostapd_freq_params *params,
2553                                       struct hostapd_freq_params *old_params)
2554 {
2555         int channel;
2556
2557         if (!params->channel) {
2558                 /* check if the new channel is supported by hw */
2559                 params->channel = hostapd_hw_get_channel(hapd, params->freq);
2560         }
2561
2562         channel = params->channel;
2563         if (!channel)
2564                 return -1;
2565
2566         /* if a pointer to old_params is provided we save previous state */
2567         if (old_params) {
2568                 old_params->channel = conf->channel;
2569                 old_params->ht_enabled = conf->ieee80211n;
2570                 old_params->sec_channel_offset = conf->secondary_channel;
2571         }
2572
2573         conf->channel = channel;
2574         conf->ieee80211n = params->ht_enabled;
2575         conf->secondary_channel = params->sec_channel_offset;
2576
2577         /* TODO: maybe call here hostapd_config_check here? */
2578
2579         return 0;
2580 }
2581
2582
2583 static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
2584                                      struct csa_settings *settings)
2585 {
2586         struct hostapd_iface *iface = hapd->iface;
2587         struct hostapd_freq_params old_freq;
2588         int ret;
2589
2590         os_memset(&old_freq, 0, sizeof(old_freq));
2591         if (!iface || !iface->freq || hapd->csa_in_progress)
2592                 return -1;
2593
2594         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2595                                          &settings->freq_params,
2596                                          &old_freq);
2597         if (ret)
2598                 return ret;
2599
2600         ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
2601
2602         /* change back the configuration */
2603         hostapd_change_config_freq(iface->bss[0], iface->conf,
2604                                    &old_freq, NULL);
2605
2606         if (ret)
2607                 return ret;
2608
2609         /* set channel switch parameters for csa ie */
2610         hapd->cs_freq_params = settings->freq_params;
2611         hapd->cs_count = settings->cs_count;
2612         hapd->cs_block_tx = settings->block_tx;
2613
2614         ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
2615         if (ret) {
2616                 free_beacon_data(&settings->beacon_after);
2617                 return ret;
2618         }
2619
2620         settings->counter_offset_beacon = hapd->cs_c_off_beacon;
2621         settings->counter_offset_presp = hapd->cs_c_off_proberesp;
2622
2623         return 0;
2624 }
2625
2626
2627 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2628 {
2629         os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
2630         hapd->cs_count = 0;
2631         hapd->cs_block_tx = 0;
2632         hapd->cs_c_off_beacon = 0;
2633         hapd->cs_c_off_proberesp = 0;
2634         hapd->csa_in_progress = 0;
2635 }
2636
2637
2638 int hostapd_switch_channel(struct hostapd_data *hapd,
2639                            struct csa_settings *settings)
2640 {
2641         int ret;
2642
2643         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
2644                 wpa_printf(MSG_INFO, "CSA is not supported");
2645                 return -1;
2646         }
2647
2648         ret = hostapd_fill_csa_settings(hapd, settings);
2649         if (ret)
2650                 return ret;
2651
2652         ret = hostapd_drv_switch_channel(hapd, settings);
2653         free_beacon_data(&settings->beacon_csa);
2654         free_beacon_data(&settings->beacon_after);
2655
2656         if (ret) {
2657                 /* if we failed, clean cs parameters */
2658                 hostapd_cleanup_cs_params(hapd);
2659                 return ret;
2660         }
2661
2662         hapd->csa_in_progress = 1;
2663         return 0;
2664 }
2665
2666
2667 void
2668 hostapd_switch_channel_fallback(struct hostapd_iface *iface,
2669                                 const struct hostapd_freq_params *freq_params)
2670 {
2671         int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
2672         unsigned int i;
2673
2674         wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
2675
2676         if (freq_params->center_freq1)
2677                 vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
2678         if (freq_params->center_freq2)
2679                 vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
2680
2681         switch (freq_params->bandwidth) {
2682         case 0:
2683         case 20:
2684         case 40:
2685                 vht_bw = VHT_CHANWIDTH_USE_HT;
2686                 break;
2687         case 80:
2688                 if (freq_params->center_freq2)
2689                         vht_bw = VHT_CHANWIDTH_80P80MHZ;
2690                 else
2691                         vht_bw = VHT_CHANWIDTH_80MHZ;
2692                 break;
2693         case 160:
2694                 vht_bw = VHT_CHANWIDTH_160MHZ;
2695                 break;
2696         default:
2697                 wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
2698                            freq_params->bandwidth);
2699                 break;
2700         }
2701
2702         iface->freq = freq_params->freq;
2703         iface->conf->channel = freq_params->channel;
2704         iface->conf->secondary_channel = freq_params->sec_channel_offset;
2705         iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
2706         iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
2707         iface->conf->vht_oper_chwidth = vht_bw;
2708         iface->conf->ieee80211n = freq_params->ht_enabled;
2709         iface->conf->ieee80211ac = freq_params->vht_enabled;
2710
2711         /*
2712          * cs_params must not be cleared earlier because the freq_params
2713          * argument may actually point to one of these.
2714          */
2715         for (i = 0; i < iface->num_bss; i++)
2716                 hostapd_cleanup_cs_params(iface->bss[i]);
2717
2718         hostapd_disable_iface(iface);
2719         hostapd_enable_iface(iface);
2720 }
2721
2722 #endif /* NEED_AP_MLME */