src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "common/hw_features_common.h"
  16 #include "radius/radius_client.h"
  17 #include "radius/radius_das.h"
  18 #include "eap_server/tncs.h"
  19 #include "eapol_auth/eapol_auth_sm.h"
  20 #include "eapol_auth/eapol_auth_sm_i.h"
  21 #include "fst/fst.h"
  22 #include "hostapd.h"
  23 #include "authsrv.h"
  24 #include "sta_info.h"
  25 #include "accounting.h"
  26 #include "ap_list.h"
  27 #include "beacon.h"
  28 #include "iapp.h"
  29 #include "ieee802_1x.h"
  30 #include "ieee802_11_auth.h"
  31 #include "vlan_init.h"
  32 #include "wpa_auth.h"
  33 #include "wps_hostapd.h"
  34 #include "hw_features.h"
  35 #include "wpa_auth_glue.h"
  36 #include "ap_drv_ops.h"
  37 #include "ap_config.h"
  38 #include "p2p_hostapd.h"
  39 #include "gas_serv.h"
  40 #include "dfs.h"
  41 #include "ieee802_11.h"
  42 #include "bss_load.h"
  43 #include "x_snoop.h"
  44 #include "dhcp_snoop.h"
  45 #include "ndisc_snoop.h"
  46
  47
  48 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  49 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  50 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  51 static int setup_interface2(struct hostapd_iface *iface);
  52 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
  53
  54
  55 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  56                                int (*cb)(struct hostapd_iface *iface,
  57                                          void *ctx), void *ctx)
  58 {
  59         size_t i;
  60         int ret;
  61
  62         for (i = 0; i < interfaces->count; i++) {
  63                 ret = cb(interfaces->iface[i], ctx);
  64                 if (ret)
  65                         return ret;
  66         }
  67
  68         return 0;
  69 }
  70
  71
  72 static void hostapd_reload_bss(struct hostapd_data *hapd)
  73 {
  74         struct hostapd_ssid *ssid;
  75
  76 #ifndef CONFIG_NO_RADIUS
  77         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  78 #endif /* CONFIG_NO_RADIUS */
  79
  80         ssid = &hapd->conf->ssid;
  81         if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  82             ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  83                 /*
  84                  * Force PSK to be derived again since SSID or passphrase may
  85                  * have changed.
  86                  */
  87                 hostapd_config_clear_wpa_psk(&hapd->conf->ssid.wpa_psk);
  88         }
  89         if (hostapd_setup_wpa_psk(hapd->conf)) {
  90                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  91                            "after reloading configuration");
  92         }
  93
  94         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  95                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  96         else
  97                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  98
  99         if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
 100                 hostapd_setup_wpa(hapd);
 101                 if (hapd->wpa_auth)
 102                         wpa_init_keys(hapd->wpa_auth);
 103         } else if (hapd->conf->wpa) {
 104                 const u8 *wpa_ie;
 105                 size_t wpa_ie_len;
 106                 hostapd_reconfig_wpa(hapd);
 107                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
 108                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
 109                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 110                                    "the kernel driver.");
 111         } else if (hapd->wpa_auth) {
 112                 wpa_deinit(hapd->wpa_auth);
 113                 hapd->wpa_auth = NULL;
 114                 hostapd_set_privacy(hapd, 0);
 115                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 116                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 117         }
 118
 119         ieee802_11_set_beacon(hapd);
 120         hostapd_update_wps(hapd);
 121
 122         if (hapd->conf->ssid.ssid_set &&
 123             hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
 124                              hapd->conf->ssid.ssid_len)) {
 125                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 126                 /* try to continue */
 127         }
 128         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 129 }
 130
 131
 132 static void hostapd_clear_old(struct hostapd_iface *iface)
 133 {
 134         size_t j;
 135
 136         /*
 137          * Deauthenticate all stations since the new configuration may not
 138          * allow them to use the BSS anymore.
 139          */
 140         for (j = 0; j < iface->num_bss; j++) {
 141                 hostapd_flush_old_stations(iface->bss[j],
 142                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 143                 hostapd_broadcast_wep_clear(iface->bss[j]);
 144
 145 #ifndef CONFIG_NO_RADIUS
 146                 /* TODO: update dynamic data based on changed configuration
 147                  * items (e.g., open/close sockets, etc.) */
 148                 radius_client_flush(iface->bss[j]->radius, 0);
 149 #endif /* CONFIG_NO_RADIUS */
 150         }
 151 }
 152
 153
 154 int hostapd_reload_config(struct hostapd_iface *iface)
 155 {
 156         struct hostapd_data *hapd = iface->bss[0];
 157         struct hostapd_config *newconf, *oldconf;
 158         size_t j;
 159
 160         if (iface->config_fname == NULL) {
 161                 /* Only in-memory config in use - assume it has been updated */
 162                 hostapd_clear_old(iface);
 163                 for (j = 0; j < iface->num_bss; j++)
 164                         hostapd_reload_bss(iface->bss[j]);
 165                 return 0;
 166         }
 167
 168         if (iface->interfaces == NULL ||
 169             iface->interfaces->config_read_cb == NULL)
 170                 return -1;
 171         newconf = iface->interfaces->config_read_cb(iface->config_fname);
 172         if (newconf == NULL)
 173                 return -1;
 174
 175         hostapd_clear_old(iface);
 176
 177         oldconf = hapd->iconf;
 178         iface->conf = newconf;
 179
 180         for (j = 0; j < iface->num_bss; j++) {
 181                 hapd = iface->bss[j];
 182                 hapd->iconf = newconf;
 183                 hapd->iconf->channel = oldconf->channel;
 184                 hapd->iconf->acs = oldconf->acs;
 185                 hapd->iconf->secondary_channel = oldconf->secondary_channel;
 186                 hapd->iconf->ieee80211n = oldconf->ieee80211n;
 187                 hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
 188                 hapd->iconf->ht_capab = oldconf->ht_capab;
 189                 hapd->iconf->vht_capab = oldconf->vht_capab;
 190                 hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
 191                 hapd->iconf->vht_oper_centr_freq_seg0_idx =
 192                         oldconf->vht_oper_centr_freq_seg0_idx;
 193                 hapd->iconf->vht_oper_centr_freq_seg1_idx =
 194                         oldconf->vht_oper_centr_freq_seg1_idx;
 195                 hapd->conf = newconf->bss[j];
 196                 hostapd_reload_bss(hapd);
 197         }
 198
 199         hostapd_config_free(oldconf);
 200
 201
 202         return 0;
 203 }
 204
 205
 206 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 207                                               char *ifname)
 208 {
 209         int i;
 210
 211         for (i = 0; i < NUM_WEP_KEYS; i++) {
 212                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 213                                         0, NULL, 0, NULL, 0)) {
 214                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 215                                    "encryption keys (ifname=%s keyidx=%d)",
 216                                    ifname, i);
 217                 }
 218         }
 219 #ifdef CONFIG_IEEE80211W
 220         if (hapd->conf->ieee80211w) {
 221                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 222                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 223                                                 NULL, i, 0, NULL,
 224                                                 0, NULL, 0)) {
 225                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 226                                            "default mgmt encryption keys "
 227                                            "(ifname=%s keyidx=%d)", ifname, i);
 228                         }
 229                 }
 230         }
 231 #endif /* CONFIG_IEEE80211W */
 232 }
 233
 234
 235 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 236 {
 237         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 238         return 0;
 239 }
 240
 241
 242 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 243 {
 244         int errors = 0, idx;
 245         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 246
 247         idx = ssid->wep.idx;
 248         if (ssid->wep.default_len &&
 249             hostapd_drv_set_key(hapd->conf->iface,
 250                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 251                                 1, NULL, 0, ssid->wep.key[idx],
 252                                 ssid->wep.len[idx])) {
 253                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 254                 errors++;
 255         }
 256
 257         return errors;
 258 }
 259
 260
 261 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 262 {
 263         os_free(hapd->probereq_cb);
 264         hapd->probereq_cb = NULL;
 265         hapd->num_probereq_cb = 0;
 266
 267 #ifdef CONFIG_P2P
 268         wpabuf_free(hapd->p2p_beacon_ie);
 269         hapd->p2p_beacon_ie = NULL;
 270         wpabuf_free(hapd->p2p_probe_resp_ie);
 271         hapd->p2p_probe_resp_ie = NULL;
 272 #endif /* CONFIG_P2P */
 273
 274         if (!hapd->started) {
 275                 wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
 276                            __func__, hapd->conf->iface);
 277                 return;
 278         }
 279         hapd->started = 0;
 280
 281         wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
 282         iapp_deinit(hapd->iapp);
 283         hapd->iapp = NULL;
 284         accounting_deinit(hapd);
 285         hostapd_deinit_wpa(hapd);
 286         vlan_deinit(hapd);
 287         hostapd_acl_deinit(hapd);
 288 #ifndef CONFIG_NO_RADIUS
 289         radius_client_deinit(hapd->radius);
 290         hapd->radius = NULL;
 291         radius_das_deinit(hapd->radius_das);
 292         hapd->radius_das = NULL;
 293 #endif /* CONFIG_NO_RADIUS */
 294
 295         hostapd_deinit_wps(hapd);
 296
 297         authsrv_deinit(hapd);
 298
 299         if (hapd->interface_added) {
 300                 hapd->interface_added = 0;
 301                 if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 302                         wpa_printf(MSG_WARNING,
 303                                    "Failed to remove BSS interface %s",
 304                                    hapd->conf->iface);
 305                         hapd->interface_added = 1;
 306                 } else {
 307                         /*
 308                          * Since this was a dynamically added interface, the
 309                          * driver wrapper may have removed its internal instance
 310                          * and hapd->drv_priv is not valid anymore.
 311                          */
 312                         hapd->drv_priv = NULL;
 313                 }
 314         }
 315
 316         wpabuf_free(hapd->time_adv);
 317
 318 #ifdef CONFIG_INTERWORKING
 319         gas_serv_deinit(hapd);
 320 #endif /* CONFIG_INTERWORKING */
 321
 322         bss_load_update_deinit(hapd);
 323         ndisc_snoop_deinit(hapd);
 324         dhcp_snoop_deinit(hapd);
 325         x_snoop_deinit(hapd);
 326
 327 #ifdef CONFIG_SQLITE
 328         bin_clear_free(hapd->tmp_eap_user.identity,
 329                        hapd->tmp_eap_user.identity_len);
 330         bin_clear_free(hapd->tmp_eap_user.password,
 331                        hapd->tmp_eap_user.password_len);
 332 #endif /* CONFIG_SQLITE */
 333
 334 #ifdef CONFIG_MESH
 335         wpabuf_free(hapd->mesh_pending_auth);
 336         hapd->mesh_pending_auth = NULL;
 337 #endif /* CONFIG_MESH */
 338 }
 339
 340
 341 /**
 342  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 343  * @hapd: Pointer to BSS data
 344  *
 345  * This function is used to free all per-BSS data structures and resources.
 346  * Most of the modules that are initialized in hostapd_setup_bss() are
 347  * deinitialized here.
 348  */
 349 static void hostapd_cleanup(struct hostapd_data *hapd)
 350 {
 351         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
 352                    hapd->conf->iface);
 353         if (hapd->iface->interfaces &&
 354             hapd->iface->interfaces->ctrl_iface_deinit)
 355                 hapd->iface->interfaces->ctrl_iface_deinit(hapd);
 356         hostapd_free_hapd_data(hapd);
 357 }
 358
 359
 360 static void sta_track_deinit(struct hostapd_iface *iface)
 361 {
 362         struct hostapd_sta_info *info;
 363
 364         if (!iface->num_sta_seen)
 365                 return;
 366
 367         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 368                                      list))) {
 369                 dl_list_del(&info->list);
 370                 iface->num_sta_seen--;
 371                 os_free(info);
 372         }
 373 }
 374
 375
 376 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 377 {
 378         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 379 #ifdef CONFIG_IEEE80211N
 380 #ifdef NEED_AP_MLME
 381         hostapd_stop_setup_timers(iface);
 382 #endif /* NEED_AP_MLME */
 383 #endif /* CONFIG_IEEE80211N */
 384         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 385         iface->hw_features = NULL;
 386         os_free(iface->current_rates);
 387         iface->current_rates = NULL;
 388         os_free(iface->basic_rates);
 389         iface->basic_rates = NULL;
 390         ap_list_deinit(iface);
 391         sta_track_deinit(iface);
 392 }
 393
 394
 395 /**
 396  * hostapd_cleanup_iface - Complete per-interface cleanup
 397  * @iface: Pointer to interface data
 398  *
 399  * This function is called after per-BSS data structures are deinitialized
 400  * with hostapd_cleanup().
 401  */
 402 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 403 {
 404         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 405         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
 406
 407         hostapd_cleanup_iface_partial(iface);
 408         hostapd_config_free(iface->conf);
 409         iface->conf = NULL;
 410
 411         os_free(iface->config_fname);
 412         os_free(iface->bss);
 413         wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
 414         os_free(iface);
 415 }
 416
 417
 418 static void hostapd_clear_wep(struct hostapd_data *hapd)
 419 {
 420         if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
 421                 hostapd_set_privacy(hapd, 0);
 422                 hostapd_broadcast_wep_clear(hapd);
 423         }
 424 }
 425
 426
 427 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 428 {
 429         int i;
 430
 431         hostapd_broadcast_wep_set(hapd);
 432
 433         if (hapd->conf->ssid.wep.default_len) {
 434                 hostapd_set_privacy(hapd, 1);
 435                 return 0;
 436         }
 437
 438         /*
 439          * When IEEE 802.1X is not enabled, the driver may need to know how to
 440          * set authentication algorithms for static WEP.
 441          */
 442         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 443
 444         for (i = 0; i < 4; i++) {
 445                 if (hapd->conf->ssid.wep.key[i] &&
 446                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 447                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 448                                         hapd->conf->ssid.wep.key[i],
 449                                         hapd->conf->ssid.wep.len[i])) {
 450                         wpa_printf(MSG_WARNING, "Could not set WEP "
 451                                    "encryption.");
 452                         return -1;
 453                 }
 454                 if (hapd->conf->ssid.wep.key[i] &&
 455                     i == hapd->conf->ssid.wep.idx)
 456                         hostapd_set_privacy(hapd, 1);
 457         }
 458
 459         return 0;
 460 }
 461
 462
 463 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 464 {
 465         int ret = 0;
 466         u8 addr[ETH_ALEN];
 467
 468         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 469                 return 0;
 470
 471         if (!hapd->iface->driver_ap_teardown) {
 472                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 473                         "Flushing old station entries");
 474
 475                 if (hostapd_flush(hapd)) {
 476                         wpa_msg(hapd->msg_ctx, MSG_WARNING,
 477                                 "Could not connect to kernel driver");
 478                         ret = -1;
 479                 }
 480         }
 481         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 482         os_memset(addr, 0xff, ETH_ALEN);
 483         hostapd_drv_sta_deauth(hapd, addr, reason);
 484         hostapd_free_stas(hapd);
 485
 486         return ret;
 487 }
 488
 489
 490 static void hostapd_bss_deinit_no_free(struct hostapd_data *hapd)
 491 {
 492         hostapd_free_stas(hapd);
 493         hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
 494         hostapd_clear_wep(hapd);
 495 }
 496
 497
 498 /**
 499  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 500  * @iface: Pointer to interface data
 501  * Returns: 0 on success, -1 on failure
 502  *
 503  * This function is used to validate that the configured BSSIDs are valid.
 504  */
 505 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 506 {
 507         u8 mask[ETH_ALEN] = { 0 };
 508         struct hostapd_data *hapd = iface->bss[0];
 509         unsigned int i = iface->conf->num_bss, bits = 0, j;
 510         int auto_addr = 0;
 511
 512         if (hostapd_drv_none(hapd))
 513                 return 0;
 514
 515         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 516
 517         /* Determine the bits necessary to cover the number of BSSIDs. */
 518         for (i--; i; i >>= 1)
 519                 bits++;
 520
 521         /* Determine the bits necessary to any configured BSSIDs,
 522            if they are higher than the number of BSSIDs. */
 523         for (j = 0; j < iface->conf->num_bss; j++) {
 524                 if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
 525                         if (j)
 526                                 auto_addr++;
 527                         continue;
 528                 }
 529
 530                 for (i = 0; i < ETH_ALEN; i++) {
 531                         mask[i] |=
 532                                 iface->conf->bss[j]->bssid[i] ^
 533                                 hapd->own_addr[i];
 534                 }
 535         }
 536
 537         if (!auto_addr)
 538                 goto skip_mask_ext;
 539
 540         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 541                 ;
 542         j = 0;
 543         if (i < ETH_ALEN) {
 544                 j = (5 - i) * 8;
 545
 546                 while (mask[i] != 0) {
 547                         mask[i] >>= 1;
 548                         j++;
 549                 }
 550         }
 551
 552         if (bits < j)
 553                 bits = j;
 554
 555         if (bits > 40) {
 556                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 557                            bits);
 558                 return -1;
 559         }
 560
 561         os_memset(mask, 0xff, ETH_ALEN);
 562         j = bits / 8;
 563         for (i = 5; i > 5 - j; i--)
 564                 mask[i] = 0;
 565         j = bits % 8;
 566         while (j--)
 567                 mask[i] <<= 1;
 568
 569 skip_mask_ext:
 570         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 571                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 572
 573         if (!auto_addr)
 574                 return 0;
 575
 576         for (i = 0; i < ETH_ALEN; i++) {
 577                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 578                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 579                                    " for start address " MACSTR ".",
 580                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 581                         wpa_printf(MSG_ERROR, "Start address must be the "
 582                                    "first address in the block (i.e., addr "
 583                                    "AND mask == addr).");
 584                         return -1;
 585                 }
 586         }
 587
 588         return 0;
 589 }
 590
 591
 592 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 593 {
 594         size_t i;
 595
 596         for (i = 0; i < conf->num_bss; i++) {
 597                 if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
 598                         return 1;
 599                 }
 600         }
 601
 602         return 0;
 603 }
 604
 605
 606 #ifndef CONFIG_NO_RADIUS
 607
 608 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 609                                     struct radius_das_attrs *attr)
 610 {
 611         if (attr->nas_identifier &&
 612             (!hapd->conf->nas_identifier ||
 613              os_strlen(hapd->conf->nas_identifier) !=
 614              attr->nas_identifier_len ||
 615              os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
 616                        attr->nas_identifier_len) != 0)) {
 617                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
 618                 return 1;
 619         }
 620
 621         if (attr->nas_ip_addr &&
 622             (hapd->conf->own_ip_addr.af != AF_INET ||
 623              os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
 624              0)) {
 625                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
 626                 return 1;
 627         }
 628
 629 #ifdef CONFIG_IPV6
 630         if (attr->nas_ipv6_addr &&
 631             (hapd->conf->own_ip_addr.af != AF_INET6 ||
 632              os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
 633              != 0)) {
 634                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
 635                 return 1;
 636         }
 637 #endif /* CONFIG_IPV6 */
 638
 639         return 0;
 640 }
 641
 642
 643 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 644                                               struct radius_das_attrs *attr,
 645                                               int *multi)
 646 {
 647         struct sta_info *selected, *sta;
 648         char buf[128];
 649         int num_attr = 0;
 650         int count;
 651
 652         *multi = 0;
 653
 654         for (sta = hapd->sta_list; sta; sta = sta->next)
 655                 sta->radius_das_match = 1;
 656
 657         if (attr->sta_addr) {
 658                 num_attr++;
 659                 sta = ap_get_sta(hapd, attr->sta_addr);
 660                 if (!sta) {
 661                         wpa_printf(MSG_DEBUG,
 662                                    "RADIUS DAS: No Calling-Station-Id match");
 663                         return NULL;
 664                 }
 665
 666                 selected = sta;
 667                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 668                         if (sta != selected)
 669                                 sta->radius_das_match = 0;
 670                 }
 671                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Calling-Station-Id match");
 672         }
 673
 674         if (attr->acct_session_id) {
 675                 num_attr++;
 676                 if (attr->acct_session_id_len != 17) {
 677                         wpa_printf(MSG_DEBUG,
 678                                    "RADIUS DAS: Acct-Session-Id cannot match");
 679                         return NULL;
 680                 }
 681                 count = 0;
 682
 683                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 684                         if (!sta->radius_das_match)
 685                                 continue;
 686                         os_snprintf(buf, sizeof(buf), "%08X-%08X",
 687                                     sta->acct_session_id_hi,
 688                                     sta->acct_session_id_lo);
 689                         if (os_memcmp(attr->acct_session_id, buf, 17) != 0)
 690                                 sta->radius_das_match = 0;
 691                         else
 692                                 count++;
 693                 }
 694
 695                 if (count == 0) {
 696                         wpa_printf(MSG_DEBUG,
 697                                    "RADIUS DAS: No matches remaining after Acct-Session-Id check");
 698                         return NULL;
 699                 }
 700                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Acct-Session-Id match");
 701         }
 702
 703         if (attr->acct_multi_session_id) {
 704                 num_attr++;
 705                 if (attr->acct_multi_session_id_len != 17) {
 706                         wpa_printf(MSG_DEBUG,
 707                                    "RADIUS DAS: Acct-Multi-Session-Id cannot match");
 708                         return NULL;
 709                 }
 710                 count = 0;
 711
 712                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 713                         if (!sta->radius_das_match)
 714                                 continue;
 715                         if (!sta->eapol_sm ||
 716                             !sta->eapol_sm->acct_multi_session_id_hi) {
 717                                 sta->radius_das_match = 0;
 718                                 continue;
 719                         }
 720                         os_snprintf(buf, sizeof(buf), "%08X+%08X",
 721                                     sta->eapol_sm->acct_multi_session_id_hi,
 722                                     sta->eapol_sm->acct_multi_session_id_lo);
 723                         if (os_memcmp(attr->acct_multi_session_id, buf, 17) !=
 724                             0)
 725                                 sta->radius_das_match = 0;
 726                         else
 727                                 count++;
 728                 }
 729
 730                 if (count == 0) {
 731                         wpa_printf(MSG_DEBUG,
 732                                    "RADIUS DAS: No matches remaining after Acct-Multi-Session-Id check");
 733                         return NULL;
 734                 }
 735                 wpa_printf(MSG_DEBUG,
 736                            "RADIUS DAS: Acct-Multi-Session-Id match");
 737         }
 738
 739         if (attr->cui) {
 740                 num_attr++;
 741                 count = 0;
 742
 743                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 744                         struct wpabuf *cui;
 745
 746                         if (!sta->radius_das_match)
 747                                 continue;
 748                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 749                         if (!cui || wpabuf_len(cui) != attr->cui_len ||
 750                             os_memcmp(wpabuf_head(cui), attr->cui,
 751                                       attr->cui_len) != 0)
 752                                 sta->radius_das_match = 0;
 753                         else
 754                                 count++;
 755                 }
 756
 757                 if (count == 0) {
 758                         wpa_printf(MSG_DEBUG,
 759                                    "RADIUS DAS: No matches remaining after Chargeable-User-Identity check");
 760                         return NULL;
 761                 }
 762                 wpa_printf(MSG_DEBUG,
 763                            "RADIUS DAS: Chargeable-User-Identity match");
 764         }
 765
 766         if (attr->user_name) {
 767                 num_attr++;
 768                 count = 0;
 769
 770                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 771                         u8 *identity;
 772                         size_t identity_len;
 773
 774                         if (!sta->radius_das_match)
 775                                 continue;
 776                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 777                                                            &identity_len);
 778                         if (!identity ||
 779                             identity_len != attr->user_name_len ||
 780                             os_memcmp(identity, attr->user_name, identity_len)
 781                             != 0)
 782                                 sta->radius_das_match = 0;
 783                         else
 784                                 count++;
 785                 }
 786
 787                 if (count == 0) {
 788                         wpa_printf(MSG_DEBUG,
 789                                    "RADIUS DAS: No matches remaining after User-Name check");
 790                         return NULL;
 791                 }
 792                 wpa_printf(MSG_DEBUG,
 793                            "RADIUS DAS: User-Name match");
 794         }
 795
 796         if (num_attr == 0) {
 797                 /*
 798                  * In theory, we could match all current associations, but it
 799                  * seems safer to just reject requests that do not include any
 800                  * session identification attributes.
 801                  */
 802                 wpa_printf(MSG_DEBUG,
 803                            "RADIUS DAS: No session identification attributes included");
 804                 return NULL;
 805         }
 806
 807         selected = NULL;
 808         for (sta = hapd->sta_list; sta; sta = sta->next) {
 809                 if (sta->radius_das_match) {
 810                         if (selected) {
 811                                 *multi = 1;
 812                                 return NULL;
 813                         }
 814                         selected = sta;
 815                 }
 816         }
 817
 818         return selected;
 819 }
 820
 821
 822 static int hostapd_das_disconnect_pmksa(struct hostapd_data *hapd,
 823                                         struct radius_das_attrs *attr)
 824 {
 825         if (!hapd->wpa_auth)
 826                 return -1;
 827         return wpa_auth_radius_das_disconnect_pmksa(hapd->wpa_auth, attr);
 828 }
 829
 830
 831 static enum radius_das_res
 832 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 833 {
 834         struct hostapd_data *hapd = ctx;
 835         struct sta_info *sta;
 836         int multi;
 837
 838         if (hostapd_das_nas_mismatch(hapd, attr))
 839                 return RADIUS_DAS_NAS_MISMATCH;
 840
 841         sta = hostapd_das_find_sta(hapd, attr, &multi);
 842         if (sta == NULL) {
 843                 if (multi) {
 844                         wpa_printf(MSG_DEBUG,
 845                                    "RADIUS DAS: Multiple sessions match - not supported");
 846                         return RADIUS_DAS_MULTI_SESSION_MATCH;
 847                 }
 848                 if (hostapd_das_disconnect_pmksa(hapd, attr) == 0) {
 849                         wpa_printf(MSG_DEBUG,
 850                                    "RADIUS DAS: PMKSA cache entry matched");
 851                         return RADIUS_DAS_SUCCESS;
 852                 }
 853                 wpa_printf(MSG_DEBUG, "RADIUS DAS: No matching session found");
 854                 return RADIUS_DAS_SESSION_NOT_FOUND;
 855         }
 856
 857         wpa_printf(MSG_DEBUG, "RADIUS DAS: Found a matching session " MACSTR
 858                    " - disconnecting", MAC2STR(sta->addr));
 859         wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
 860
 861         hostapd_drv_sta_deauth(hapd, sta->addr,
 862                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 863         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 864
 865         return RADIUS_DAS_SUCCESS;
 866 }
 867
 868 #endif /* CONFIG_NO_RADIUS */
 869
 870
 871 /**
 872  * hostapd_setup_bss - Per-BSS setup (initialization)
 873  * @hapd: Pointer to BSS data
 874  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
 875  *      but interface may exist
 876  *
 877  * This function is used to initialize all per-BSS data structures and
 878  * resources. This gets called in a loop for each BSS when an interface is
 879  * initialized. Most of the modules that are initialized here will be
 880  * deinitialized in hostapd_cleanup().
 881  */
 882 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 883 {
 884         struct hostapd_bss_config *conf = hapd->conf;
 885         u8 ssid[SSID_MAX_LEN + 1];
 886         int ssid_len, set_ssid;
 887         char force_ifname[IFNAMSIZ];
 888         u8 if_addr[ETH_ALEN];
 889         int flush_old_stations = 1;
 890
 891         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 892                    __func__, hapd, conf->iface, first);
 893
 894 #ifdef EAP_SERVER_TNC
 895         if (conf->tnc && tncs_global_init() < 0) {
 896                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 897                 return -1;
 898         }
 899 #endif /* EAP_SERVER_TNC */
 900
 901         if (hapd->started) {
 902                 wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
 903                            __func__, conf->iface);
 904                 return -1;
 905         }
 906         hapd->started = 1;
 907
 908         if (!first || first == -1) {
 909                 if (hostapd_mac_comp_empty(conf->bssid) == 0) {
 910                         /* Allocate the next available BSSID. */
 911                         do {
 912                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 913                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 914                 } else {
 915                         /* Allocate the configured BSSID. */
 916                         os_memcpy(hapd->own_addr, conf->bssid, ETH_ALEN);
 917
 918                         if (hostapd_mac_comp(hapd->own_addr,
 919                                              hapd->iface->bss[0]->own_addr) ==
 920                             0) {
 921                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 922                                            "BSSID set to the MAC address of "
 923                                            "the radio", conf->iface);
 924                                 return -1;
 925                         }
 926                 }
 927
 928                 hapd->interface_added = 1;
 929                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 930                                    conf->iface, hapd->own_addr, hapd,
 931                                    &hapd->drv_priv, force_ifname, if_addr,
 932                                    conf->bridge[0] ? conf->bridge : NULL,
 933                                    first == -1)) {
 934                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 935                                    MACSTR ")", MAC2STR(hapd->own_addr));
 936                         hapd->interface_added = 0;
 937                         return -1;
 938                 }
 939         }
 940
 941         if (conf->wmm_enabled < 0)
 942                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 943
 944 #ifdef CONFIG_MESH
 945         if (hapd->iface->mconf == NULL)
 946                 flush_old_stations = 0;
 947 #endif /* CONFIG_MESH */
 948
 949         if (flush_old_stations)
 950                 hostapd_flush_old_stations(hapd,
 951                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 952         hostapd_set_privacy(hapd, 0);
 953
 954         hostapd_broadcast_wep_clear(hapd);
 955         if (hostapd_setup_encryption(conf->iface, hapd))
 956                 return -1;
 957
 958         /*
 959          * Fetch the SSID from the system and use it or,
 960          * if one was specified in the config file, verify they
 961          * match.
 962          */
 963         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 964         if (ssid_len < 0) {
 965                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 966                 return -1;
 967         }
 968         if (conf->ssid.ssid_set) {
 969                 /*
 970                  * If SSID is specified in the config file and it differs
 971                  * from what is being used then force installation of the
 972                  * new SSID.
 973                  */
 974                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 975                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 976         } else {
 977                 /*
 978                  * No SSID in the config file; just use the one we got
 979                  * from the system.
 980                  */
 981                 set_ssid = 0;
 982                 conf->ssid.ssid_len = ssid_len;
 983                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 984         }
 985
 986         if (!hostapd_drv_none(hapd)) {
 987                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 988                            " and ssid \"%s\"",
 989                            conf->iface, MAC2STR(hapd->own_addr),
 990                            wpa_ssid_txt(conf->ssid.ssid, conf->ssid.ssid_len));
 991         }
 992
 993         if (hostapd_setup_wpa_psk(conf)) {
 994                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 995                 return -1;
 996         }
 997
 998         /* Set SSID for the kernel driver (to be used in beacon and probe
 999          * response frames) */
1000         if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
1001                                          conf->ssid.ssid_len)) {
1002                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
1003                 return -1;
1004         }
1005
1006         if (wpa_debug_level <= MSG_MSGDUMP)
1007                 conf->radius->msg_dumps = 1;
1008 #ifndef CONFIG_NO_RADIUS
1009         hapd->radius = radius_client_init(hapd, conf->radius);
1010         if (hapd->radius == NULL) {
1011                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
1012                 return -1;
1013         }
1014
1015         if (conf->radius_das_port) {
1016                 struct radius_das_conf das_conf;
1017                 os_memset(&das_conf, 0, sizeof(das_conf));
1018                 das_conf.port = conf->radius_das_port;
1019                 das_conf.shared_secret = conf->radius_das_shared_secret;
1020                 das_conf.shared_secret_len =
1021                         conf->radius_das_shared_secret_len;
1022                 das_conf.client_addr = &conf->radius_das_client_addr;
1023                 das_conf.time_window = conf->radius_das_time_window;
1024                 das_conf.require_event_timestamp =
1025                         conf->radius_das_require_event_timestamp;
1026                 das_conf.ctx = hapd;
1027                 das_conf.disconnect = hostapd_das_disconnect;
1028                 hapd->radius_das = radius_das_init(&das_conf);
1029                 if (hapd->radius_das == NULL) {
1030                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
1031                                    "failed.");
1032                         return -1;
1033                 }
1034         }
1035 #endif /* CONFIG_NO_RADIUS */
1036
1037         if (hostapd_acl_init(hapd)) {
1038                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
1039                 return -1;
1040         }
1041         if (hostapd_init_wps(hapd, conf))
1042                 return -1;
1043
1044         if (authsrv_init(hapd) < 0)
1045                 return -1;
1046
1047         if (ieee802_1x_init(hapd)) {
1048                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
1049                 return -1;
1050         }
1051
1052         if ((conf->wpa || conf->osen) && hostapd_setup_wpa(hapd))
1053                 return -1;
1054
1055         if (accounting_init(hapd)) {
1056                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
1057                 return -1;
1058         }
1059
1060         if (conf->ieee802_11f &&
1061             (hapd->iapp = iapp_init(hapd, conf->iapp_iface)) == NULL) {
1062                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
1063                            "failed.");
1064                 return -1;
1065         }
1066
1067 #ifdef CONFIG_INTERWORKING
1068         if (gas_serv_init(hapd)) {
1069                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
1070                 return -1;
1071         }
1072
1073         if (conf->qos_map_set_len &&
1074             hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
1075                                     conf->qos_map_set_len)) {
1076                 wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
1077                 return -1;
1078         }
1079 #endif /* CONFIG_INTERWORKING */
1080
1081         if (conf->bss_load_update_period && bss_load_update_init(hapd)) {
1082                 wpa_printf(MSG_ERROR, "BSS Load initialization failed");
1083                 return -1;
1084         }
1085
1086         if (conf->proxy_arp) {
1087                 if (x_snoop_init(hapd)) {
1088                         wpa_printf(MSG_ERROR,
1089                                    "Generic snooping infrastructure initialization failed");
1090                         return -1;
1091                 }
1092
1093                 if (dhcp_snoop_init(hapd)) {
1094                         wpa_printf(MSG_ERROR,
1095                                    "DHCP snooping initialization failed");
1096                         return -1;
1097                 }
1098
1099                 if (ndisc_snoop_init(hapd)) {
1100                         wpa_printf(MSG_ERROR,
1101                                    "Neighbor Discovery snooping initialization failed");
1102                         return -1;
1103                 }
1104         }
1105
1106         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
1107                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
1108                 return -1;
1109         }
1110
1111         if (!conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
1112                 return -1;
1113
1114         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
1115                 return -1;
1116
1117         if (hapd->driver && hapd->driver->set_operstate)
1118                 hapd->driver->set_operstate(hapd->drv_priv, 1);
1119
1120         return 0;
1121 }
1122
1123
1124 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
1125 {
1126         struct hostapd_data *hapd = iface->bss[0];
1127         int i;
1128         struct hostapd_tx_queue_params *p;
1129
1130 #ifdef CONFIG_MESH
1131         if (iface->mconf == NULL)
1132                 return;
1133 #endif /* CONFIG_MESH */
1134
1135         for (i = 0; i < NUM_TX_QUEUES; i++) {
1136                 p = &iface->conf->tx_queue[i];
1137
1138                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
1139                                                 p->cwmax, p->burst)) {
1140                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
1141                                    "parameters for queue %d.", i);
1142                         /* Continue anyway */
1143                 }
1144         }
1145 }
1146
1147
1148 static int hostapd_set_acl_list(struct hostapd_data *hapd,
1149                                 struct mac_acl_entry *mac_acl,
1150                                 int n_entries, u8 accept_acl)
1151 {
1152         struct hostapd_acl_params *acl_params;
1153         int i, err;
1154
1155         acl_params = os_zalloc(sizeof(*acl_params) +
1156                                (n_entries * sizeof(acl_params->mac_acl[0])));
1157         if (!acl_params)
1158                 return -ENOMEM;
1159
1160         for (i = 0; i < n_entries; i++)
1161                 os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
1162                           ETH_ALEN);
1163
1164         acl_params->acl_policy = accept_acl;
1165         acl_params->num_mac_acl = n_entries;
1166
1167         err = hostapd_drv_set_acl(hapd, acl_params);
1168
1169         os_free(acl_params);
1170
1171         return err;
1172 }
1173
1174
1175 static void hostapd_set_acl(struct hostapd_data *hapd)
1176 {
1177         struct hostapd_config *conf = hapd->iconf;
1178         int err;
1179         u8 accept_acl;
1180
1181         if (hapd->iface->drv_max_acl_mac_addrs == 0)
1182                 return;
1183
1184         if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
1185                 accept_acl = 1;
1186                 err = hostapd_set_acl_list(hapd, conf->bss[0]->accept_mac,
1187                                            conf->bss[0]->num_accept_mac,
1188                                            accept_acl);
1189                 if (err) {
1190                         wpa_printf(MSG_DEBUG, "Failed to set accept acl");
1191                         return;
1192                 }
1193         } else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
1194                 accept_acl = 0;
1195                 err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
1196                                            conf->bss[0]->num_deny_mac,
1197                                            accept_acl);
1198                 if (err) {
1199                         wpa_printf(MSG_DEBUG, "Failed to set deny acl");
1200                         return;
1201                 }
1202         }
1203 }
1204
1205
1206 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
1207 {
1208         if (!hapd->iface->interfaces ||
1209             !hapd->iface->interfaces->ctrl_iface_init)
1210                 return 0;
1211
1212         if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
1213                 wpa_printf(MSG_ERROR,
1214                            "Failed to setup control interface for %s",
1215                            hapd->conf->iface);
1216                 return -1;
1217         }
1218
1219         return 0;
1220 }
1221
1222
1223 static int start_ctrl_iface(struct hostapd_iface *iface)
1224 {
1225         size_t i;
1226
1227         if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
1228                 return 0;
1229
1230         for (i = 0; i < iface->num_bss; i++) {
1231                 struct hostapd_data *hapd = iface->bss[i];
1232                 if (iface->interfaces->ctrl_iface_init(hapd)) {
1233                         wpa_printf(MSG_ERROR,
1234                                    "Failed to setup control interface for %s",
1235                                    hapd->conf->iface);
1236                         return -1;
1237                 }
1238         }
1239
1240         return 0;
1241 }
1242
1243
1244 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
1245 {
1246         struct hostapd_iface *iface = eloop_ctx;
1247
1248         if (!iface->wait_channel_update) {
1249                 wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
1250                 return;
1251         }
1252
1253         /*
1254          * It is possible that the existing channel list is acceptable, so try
1255          * to proceed.
1256          */
1257         wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
1258         setup_interface2(iface);
1259 }
1260
1261
1262 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1263 {
1264         if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1265                 return;
1266
1267         wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1268         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1269         setup_interface2(iface);
1270 }
1271
1272
1273 static int setup_interface(struct hostapd_iface *iface)
1274 {
1275         struct hostapd_data *hapd = iface->bss[0];
1276         size_t i;
1277
1278         /*
1279          * It is possible that setup_interface() is called after the interface
1280          * was disabled etc., in which case driver_ap_teardown is possibly set
1281          * to 1. Clear it here so any other key/station deletion, which is not
1282          * part of a teardown flow, would also call the relevant driver
1283          * callbacks.
1284          */
1285         iface->driver_ap_teardown = 0;
1286
1287         if (!iface->phy[0]) {
1288                 const char *phy = hostapd_drv_get_radio_name(hapd);
1289                 if (phy) {
1290                         wpa_printf(MSG_DEBUG, "phy: %s", phy);
1291                         os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1292                 }
1293         }
1294
1295         /*
1296          * Make sure that all BSSes get configured with a pointer to the same
1297          * driver interface.
1298          */
1299         for (i = 1; i < iface->num_bss; i++) {
1300                 iface->bss[i]->driver = hapd->driver;
1301                 iface->bss[i]->drv_priv = hapd->drv_priv;
1302         }
1303
1304         if (hostapd_validate_bssid_configuration(iface))
1305                 return -1;
1306
1307         /*
1308          * Initialize control interfaces early to allow external monitoring of
1309          * channel setup operations that may take considerable amount of time
1310          * especially for DFS cases.
1311          */
1312         if (start_ctrl_iface(iface))
1313                 return -1;
1314
1315         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1316                 char country[4], previous_country[4];
1317
1318                 hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1319                 if (hostapd_get_country(hapd, previous_country) < 0)
1320                         previous_country[0] = '\0';
1321
1322                 os_memcpy(country, hapd->iconf->country, 3);
1323                 country[3] = '\0';
1324                 if (hostapd_set_country(hapd, country) < 0) {
1325                         wpa_printf(MSG_ERROR, "Failed to set country code");
1326                         return -1;
1327                 }
1328
1329                 wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1330                            previous_country, country);
1331
1332                 if (os_strncmp(previous_country, country, 2) != 0) {
1333                         wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1334                         iface->wait_channel_update = 1;
1335                         eloop_register_timeout(5, 0,
1336                                                channel_list_update_timeout,
1337                                                iface, NULL);
1338                         return 0;
1339                 }
1340         }
1341
1342         return setup_interface2(iface);
1343 }
1344
1345
1346 static int setup_interface2(struct hostapd_iface *iface)
1347 {
1348         iface->wait_channel_update = 0;
1349
1350         if (hostapd_get_hw_features(iface)) {
1351                 /* Not all drivers support this yet, so continue without hw
1352                  * feature data. */
1353         } else {
1354                 int ret = hostapd_select_hw_mode(iface);
1355                 if (ret < 0) {
1356                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1357                                    "channel. (%d)", ret);
1358                         goto fail;
1359                 }
1360                 if (ret == 1) {
1361                         wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1362                         return 0;
1363                 }
1364                 ret = hostapd_check_ht_capab(iface);
1365                 if (ret < 0)
1366                         goto fail;
1367                 if (ret == 1) {
1368                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1369                                    "be completed in a callback");
1370                         return 0;
1371                 }
1372
1373                 if (iface->conf->ieee80211h)
1374                         wpa_printf(MSG_DEBUG, "DFS support is enabled");
1375         }
1376         return hostapd_setup_interface_complete(iface, 0);
1377
1378 fail:
1379         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1380         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1381         if (iface->interfaces && iface->interfaces->terminate_on_error)
1382                 eloop_terminate();
1383         return -1;
1384 }
1385
1386
1387 #ifdef CONFIG_FST
1388
1389 static const u8 * fst_hostapd_get_bssid_cb(void *ctx)
1390 {
1391         struct hostapd_data *hapd = ctx;
1392
1393         return hapd->own_addr;
1394 }
1395
1396
1397 static void fst_hostapd_get_channel_info_cb(void *ctx,
1398                                             enum hostapd_hw_mode *hw_mode,
1399                                             u8 *channel)
1400 {
1401         struct hostapd_data *hapd = ctx;
1402
1403         *hw_mode = ieee80211_freq_to_chan(hapd->iface->freq, channel);
1404 }
1405
1406
1407 static void fst_hostapd_set_ies_cb(void *ctx, const struct wpabuf *fst_ies)
1408 {
1409         struct hostapd_data *hapd = ctx;
1410
1411         if (hapd->iface->fst_ies != fst_ies) {
1412                 hapd->iface->fst_ies = fst_ies;
1413                 if (ieee802_11_set_beacon(hapd))
1414                         wpa_printf(MSG_WARNING, "FST: Cannot set beacon");
1415         }
1416 }
1417
1418
1419 static int fst_hostapd_send_action_cb(void *ctx, const u8 *da,
1420                                       struct wpabuf *buf)
1421 {
1422         struct hostapd_data *hapd = ctx;
1423
1424         return hostapd_drv_send_action(hapd, hapd->iface->freq, 0, da,
1425                                        wpabuf_head(buf), wpabuf_len(buf));
1426 }
1427
1428
1429 static const struct wpabuf * fst_hostapd_get_mb_ie_cb(void *ctx, const u8 *addr)
1430 {
1431         struct hostapd_data *hapd = ctx;
1432         struct sta_info *sta = ap_get_sta(hapd, addr);
1433
1434         return sta ? sta->mb_ies : NULL;
1435 }
1436
1437
1438 static void fst_hostapd_update_mb_ie_cb(void *ctx, const u8 *addr,
1439                                         const u8 *buf, size_t size)
1440 {
1441         struct hostapd_data *hapd = ctx;
1442         struct sta_info *sta = ap_get_sta(hapd, addr);
1443
1444         if (sta) {
1445                 struct mb_ies_info info;
1446
1447                 if (!mb_ies_info_by_ies(&info, buf, size)) {
1448                         wpabuf_free(sta->mb_ies);
1449                         sta->mb_ies = mb_ies_by_info(&info);
1450                 }
1451         }
1452 }
1453
1454
1455 static const u8 * fst_hostapd_get_sta(struct fst_get_peer_ctx **get_ctx,
1456                                       Boolean mb_only)
1457 {
1458         struct sta_info *s = (struct sta_info *) *get_ctx;
1459
1460         if (mb_only) {
1461                 for (; s && !s->mb_ies; s = s->next)
1462                         ;
1463         }
1464
1465         if (s) {
1466                 *get_ctx = (struct fst_get_peer_ctx *) s->next;
1467
1468                 return s->addr;
1469         }
1470
1471         *get_ctx = NULL;
1472         return NULL;
1473 }
1474
1475
1476 static const u8 * fst_hostapd_get_peer_first(void *ctx,
1477                                              struct fst_get_peer_ctx **get_ctx,
1478                                              Boolean mb_only)
1479 {
1480         struct hostapd_data *hapd = ctx;
1481
1482         *get_ctx = (struct fst_get_peer_ctx *) hapd->sta_list;
1483
1484         return fst_hostapd_get_sta(get_ctx, mb_only);
1485 }
1486
1487
1488 static const u8 * fst_hostapd_get_peer_next(void *ctx,
1489                                             struct fst_get_peer_ctx **get_ctx,
1490                                             Boolean mb_only)
1491 {
1492         return fst_hostapd_get_sta(get_ctx, mb_only);
1493 }
1494
1495
1496 void fst_hostapd_fill_iface_obj(struct hostapd_data *hapd,
1497                                 struct fst_wpa_obj *iface_obj)
1498 {
1499         iface_obj->ctx = hapd;
1500         iface_obj->get_bssid = fst_hostapd_get_bssid_cb;
1501         iface_obj->get_channel_info = fst_hostapd_get_channel_info_cb;
1502         iface_obj->set_ies = fst_hostapd_set_ies_cb;
1503         iface_obj->send_action = fst_hostapd_send_action_cb;
1504         iface_obj->get_mb_ie = fst_hostapd_get_mb_ie_cb;
1505         iface_obj->update_mb_ie = fst_hostapd_update_mb_ie_cb;
1506         iface_obj->get_peer_first = fst_hostapd_get_peer_first;
1507         iface_obj->get_peer_next = fst_hostapd_get_peer_next;
1508 }
1509
1510 #endif /* CONFIG_FST */
1511
1512
1513 /**
1514  * hostapd_setup_interface_complete - Complete interface setup
1515  *
1516  * This function is called when previous steps in the interface setup has been
1517  * completed. This can also start operations, e.g., DFS, that will require
1518  * additional processing before interface is ready to be enabled. Such
1519  * operations will call this function from eloop callbacks when finished.
1520  */
1521 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1522 {
1523         struct hostapd_data *hapd = iface->bss[0];
1524         size_t j;
1525         u8 *prev_addr;
1526         int delay_apply_cfg = 0;
1527         int res_dfs_offload = 0;
1528
1529         if (err)
1530                 goto fail;
1531
1532         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1533         if (iface->conf->channel) {
1534 #ifdef NEED_AP_MLME
1535                 int res;
1536 #endif /* NEED_AP_MLME */
1537
1538                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1539                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1540                            "Frequency: %d MHz",
1541                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1542                            iface->conf->channel, iface->freq);
1543
1544 #ifdef NEED_AP_MLME
1545                 /* Handle DFS only if it is not offloaded to the driver */
1546                 if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
1547                         /* Check DFS */
1548                         res = hostapd_handle_dfs(iface);
1549                         if (res <= 0) {
1550                                 if (res < 0)
1551                                         goto fail;
1552                                 return res;
1553                         }
1554                 } else {
1555                         /* If DFS is offloaded to the driver */
1556                         res_dfs_offload = hostapd_handle_dfs_offload(iface);
1557                         if (res_dfs_offload <= 0) {
1558                                 if (res_dfs_offload < 0)
1559                                         goto fail;
1560                         } else {
1561                                 wpa_printf(MSG_DEBUG,
1562                                            "Proceed with AP/channel setup");
1563                                 /*
1564                                  * If this is a DFS channel, move to completing
1565                                  * AP setup.
1566                                  */
1567                                 if (res_dfs_offload == 1)
1568                                         goto dfs_offload;
1569                                 /* Otherwise fall through. */
1570                         }
1571                 }
1572 #endif /* NEED_AP_MLME */
1573
1574 #ifdef CONFIG_MESH
1575                 if (iface->mconf != NULL) {
1576                         wpa_printf(MSG_DEBUG,
1577                                    "%s: Mesh configuration will be applied while joining the mesh network",
1578                                    iface->bss[0]->conf->iface);
1579                         delay_apply_cfg = 1;
1580                 }
1581 #endif /* CONFIG_MESH */
1582
1583                 if (!delay_apply_cfg &&
1584                     hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1585                                      hapd->iconf->channel,
1586                                      hapd->iconf->ieee80211n,
1587                                      hapd->iconf->ieee80211ac,
1588                                      hapd->iconf->secondary_channel,
1589                                      hapd->iconf->vht_oper_chwidth,
1590                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1591                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1592                         wpa_printf(MSG_ERROR, "Could not set channel for "
1593                                    "kernel driver");
1594                         goto fail;
1595                 }
1596         }
1597
1598         if (iface->current_mode) {
1599                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1600                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1601                                    "table.");
1602                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1603                                        HOSTAPD_LEVEL_WARNING,
1604                                        "Failed to prepare rates table.");
1605                         goto fail;
1606                 }
1607         }
1608
1609         if (hapd->iconf->rts_threshold > -1 &&
1610             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1611                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1612                            "kernel driver");
1613                 goto fail;
1614         }
1615
1616         if (hapd->iconf->fragm_threshold > -1 &&
1617             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1618                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1619                            "for kernel driver");
1620                 goto fail;
1621         }
1622
1623         prev_addr = hapd->own_addr;
1624
1625         for (j = 0; j < iface->num_bss; j++) {
1626                 hapd = iface->bss[j];
1627                 if (j)
1628                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1629                 if (hostapd_setup_bss(hapd, j == 0)) {
1630                         do {
1631                                 hapd = iface->bss[j];
1632                                 hostapd_bss_deinit_no_free(hapd);
1633                                 hostapd_free_hapd_data(hapd);
1634                         } while (j-- > 0);
1635                         goto fail;
1636                 }
1637                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1638                         prev_addr = hapd->own_addr;
1639         }
1640         hapd = iface->bss[0];
1641
1642         hostapd_tx_queue_params(iface);
1643
1644         ap_list_init(iface);
1645         dl_list_init(&iface->sta_seen);
1646
1647         hostapd_set_acl(hapd);
1648
1649         if (hostapd_driver_commit(hapd) < 0) {
1650                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1651                            "configuration", __func__);
1652                 goto fail;
1653         }
1654
1655         /*
1656          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1657          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1658          * mode), the interface is up only after driver_commit, so initialize
1659          * WPS after driver_commit.
1660          */
1661         for (j = 0; j < iface->num_bss; j++) {
1662                 if (hostapd_init_wps_complete(iface->bss[j]))
1663                         goto fail;
1664         }
1665
1666         if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
1667             !res_dfs_offload) {
1668                 /*
1669                  * If freq is DFS, and DFS is offloaded to the driver, then wait
1670                  * for CAC to complete.
1671                  */
1672                 wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
1673                 return res_dfs_offload;
1674         }
1675
1676 #ifdef NEED_AP_MLME
1677 dfs_offload:
1678 #endif /* NEED_AP_MLME */
1679
1680 #ifdef CONFIG_FST
1681         if (hapd->iconf->fst_cfg.group_id[0]) {
1682                 struct fst_wpa_obj iface_obj;
1683
1684                 fst_hostapd_fill_iface_obj(hapd, &iface_obj);
1685                 iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
1686                                         &iface_obj, &hapd->iconf->fst_cfg);
1687                 if (!iface->fst) {
1688                         wpa_printf(MSG_ERROR, "Could not attach to FST %s",
1689                                    hapd->iconf->fst_cfg.group_id);
1690                         goto fail;
1691                 }
1692         }
1693 #endif /* CONFIG_FST */
1694
1695         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1696         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1697         if (hapd->setup_complete_cb)
1698                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1699
1700         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1701                    iface->bss[0]->conf->iface);
1702         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1703                 iface->interfaces->terminate_on_error--;
1704
1705         return 0;
1706
1707 fail:
1708         wpa_printf(MSG_ERROR, "Interface initialization failed");
1709         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1710         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1711 #ifdef CONFIG_FST
1712         if (iface->fst) {
1713                 fst_detach(iface->fst);
1714                 iface->fst = NULL;
1715         }
1716 #endif /* CONFIG_FST */
1717         if (iface->interfaces && iface->interfaces->terminate_on_error)
1718                 eloop_terminate();
1719         return -1;
1720 }
1721
1722
1723 /**
1724  * hostapd_setup_interface - Setup of an interface
1725  * @iface: Pointer to interface data.
1726  * Returns: 0 on success, -1 on failure
1727  *
1728  * Initializes the driver interface, validates the configuration,
1729  * and sets driver parameters based on the configuration.
1730  * Flushes old stations, sets the channel, encryption,
1731  * beacons, and WDS links based on the configuration.
1732  *
1733  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1734  * or DFS operations, this function returns 0 before such operations have been
1735  * completed. The pending operations are registered into eloop and will be
1736  * completed from eloop callbacks. Those callbacks end up calling
1737  * hostapd_setup_interface_complete() once setup has been completed.
1738  */
1739 int hostapd_setup_interface(struct hostapd_iface *iface)
1740 {
1741         int ret;
1742
1743         ret = setup_interface(iface);
1744         if (ret) {
1745                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1746                            iface->bss[0]->conf->iface);
1747                 return -1;
1748         }
1749
1750         return 0;
1751 }
1752
1753
1754 /**
1755  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1756  * @hapd_iface: Pointer to interface data
1757  * @conf: Pointer to per-interface configuration
1758  * @bss: Pointer to per-BSS configuration for this BSS
1759  * Returns: Pointer to allocated BSS data
1760  *
1761  * This function is used to allocate per-BSS data structure. This data will be
1762  * freed after hostapd_cleanup() is called for it during interface
1763  * deinitialization.
1764  */
1765 struct hostapd_data *
1766 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1767                        struct hostapd_config *conf,
1768                        struct hostapd_bss_config *bss)
1769 {
1770         struct hostapd_data *hapd;
1771
1772         hapd = os_zalloc(sizeof(*hapd));
1773         if (hapd == NULL)
1774                 return NULL;
1775
1776         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1777         hapd->iconf = conf;
1778         hapd->conf = bss;
1779         hapd->iface = hapd_iface;
1780         hapd->driver = hapd->iconf->driver;
1781         hapd->ctrl_sock = -1;
1782
1783         return hapd;
1784 }
1785
1786
1787 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1788 {
1789         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1790                    hapd->conf->iface);
1791         hostapd_bss_deinit_no_free(hapd);
1792         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1793         hostapd_cleanup(hapd);
1794 }
1795
1796
1797 void hostapd_interface_deinit(struct hostapd_iface *iface)
1798 {
1799         int j;
1800
1801         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1802         if (iface == NULL)
1803                 return;
1804
1805         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1806
1807 #ifdef CONFIG_IEEE80211N
1808 #ifdef NEED_AP_MLME
1809         hostapd_stop_setup_timers(iface);
1810         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
1811 #endif /* NEED_AP_MLME */
1812 #endif /* CONFIG_IEEE80211N */
1813         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1814         iface->wait_channel_update = 0;
1815
1816 #ifdef CONFIG_FST
1817         if (iface->fst) {
1818                 fst_detach(iface->fst);
1819                 iface->fst = NULL;
1820         }
1821 #endif /* CONFIG_FST */
1822
1823         for (j = iface->num_bss - 1; j >= 0; j--)
1824                 hostapd_bss_deinit(iface->bss[j]);
1825 }
1826
1827
1828 void hostapd_interface_free(struct hostapd_iface *iface)
1829 {
1830         size_t j;
1831         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1832         for (j = 0; j < iface->num_bss; j++) {
1833                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1834                            __func__, iface->bss[j]);
1835                 os_free(iface->bss[j]);
1836         }
1837         hostapd_cleanup_iface(iface);
1838 }
1839
1840
1841 /**
1842  * hostapd_init - Allocate and initialize per-interface data
1843  * @config_file: Path to the configuration file
1844  * Returns: Pointer to the allocated interface data or %NULL on failure
1845  *
1846  * This function is used to allocate main data structures for per-interface
1847  * data. The allocated data buffer will be freed by calling
1848  * hostapd_cleanup_iface().
1849  */
1850 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1851                                     const char *config_file)
1852 {
1853         struct hostapd_iface *hapd_iface = NULL;
1854         struct hostapd_config *conf = NULL;
1855         struct hostapd_data *hapd;
1856         size_t i;
1857
1858         hapd_iface = os_zalloc(sizeof(*hapd_iface));
1859         if (hapd_iface == NULL)
1860                 goto fail;
1861
1862         hapd_iface->config_fname = os_strdup(config_file);
1863         if (hapd_iface->config_fname == NULL)
1864                 goto fail;
1865
1866         conf = interfaces->config_read_cb(hapd_iface->config_fname);
1867         if (conf == NULL)
1868                 goto fail;
1869         hapd_iface->conf = conf;
1870
1871         hapd_iface->num_bss = conf->num_bss;
1872         hapd_iface->bss = os_calloc(conf->num_bss,
1873                                     sizeof(struct hostapd_data *));
1874         if (hapd_iface->bss == NULL)
1875                 goto fail;
1876
1877         for (i = 0; i < conf->num_bss; i++) {
1878                 hapd = hapd_iface->bss[i] =
1879                         hostapd_alloc_bss_data(hapd_iface, conf,
1880                                                conf->bss[i]);
1881                 if (hapd == NULL)
1882                         goto fail;
1883                 hapd->msg_ctx = hapd;
1884         }
1885
1886         return hapd_iface;
1887
1888 fail:
1889         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1890                    config_file);
1891         if (conf)
1892                 hostapd_config_free(conf);
1893         if (hapd_iface) {
1894                 os_free(hapd_iface->config_fname);
1895                 os_free(hapd_iface->bss);
1896                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1897                            __func__, hapd_iface);
1898                 os_free(hapd_iface);
1899         }
1900         return NULL;
1901 }
1902
1903
1904 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1905 {
1906         size_t i, j;
1907
1908         for (i = 0; i < interfaces->count; i++) {
1909                 struct hostapd_iface *iface = interfaces->iface[i];
1910                 for (j = 0; j < iface->num_bss; j++) {
1911                         struct hostapd_data *hapd = iface->bss[j];
1912                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
1913                                 return 1;
1914                 }
1915         }
1916
1917         return 0;
1918 }
1919
1920
1921 /**
1922  * hostapd_interface_init_bss - Read configuration file and init BSS data
1923  *
1924  * This function is used to parse configuration file for a BSS. This BSS is
1925  * added to an existing interface sharing the same radio (if any) or a new
1926  * interface is created if this is the first interface on a radio. This
1927  * allocate memory for the BSS. No actual driver operations are started.
1928  *
1929  * This is similar to hostapd_interface_init(), but for a case where the
1930  * configuration is used to add a single BSS instead of all BSSes for a radio.
1931  */
1932 struct hostapd_iface *
1933 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
1934                            const char *config_fname, int debug)
1935 {
1936         struct hostapd_iface *new_iface = NULL, *iface = NULL;
1937         struct hostapd_data *hapd;
1938         int k;
1939         size_t i, bss_idx;
1940
1941         if (!phy || !*phy)
1942                 return NULL;
1943
1944         for (i = 0; i < interfaces->count; i++) {
1945                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
1946                         iface = interfaces->iface[i];
1947                         break;
1948                 }
1949         }
1950
1951         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
1952                    config_fname, phy, iface ? "" : " --> new PHY");
1953         if (iface) {
1954                 struct hostapd_config *conf;
1955                 struct hostapd_bss_config **tmp_conf;
1956                 struct hostapd_data **tmp_bss;
1957                 struct hostapd_bss_config *bss;
1958                 const char *ifname;
1959
1960                 /* Add new BSS to existing iface */
1961                 conf = interfaces->config_read_cb(config_fname);
1962                 if (conf == NULL)
1963                         return NULL;
1964                 if (conf->num_bss > 1) {
1965                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
1966                         hostapd_config_free(conf);
1967                         return NULL;
1968                 }
1969
1970                 ifname = conf->bss[0]->iface;
1971                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
1972                         wpa_printf(MSG_ERROR,
1973                                    "Interface name %s already in use", ifname);
1974                         hostapd_config_free(conf);
1975                         return NULL;
1976                 }
1977
1978                 tmp_conf = os_realloc_array(
1979                         iface->conf->bss, iface->conf->num_bss + 1,
1980                         sizeof(struct hostapd_bss_config *));
1981                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
1982                                            sizeof(struct hostapd_data *));
1983                 if (tmp_bss)
1984                         iface->bss = tmp_bss;
1985                 if (tmp_conf) {
1986                         iface->conf->bss = tmp_conf;
1987                         iface->conf->last_bss = tmp_conf[0];
1988                 }
1989                 if (tmp_bss == NULL || tmp_conf == NULL) {
1990                         hostapd_config_free(conf);
1991                         return NULL;
1992                 }
1993                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
1994                 iface->conf->num_bss++;
1995
1996                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
1997                 if (hapd == NULL) {
1998                         iface->conf->num_bss--;
1999                         hostapd_config_free(conf);
2000                         return NULL;
2001                 }
2002                 iface->conf->last_bss = bss;
2003                 iface->bss[iface->num_bss] = hapd;
2004                 hapd->msg_ctx = hapd;
2005
2006                 bss_idx = iface->num_bss++;
2007                 conf->num_bss--;
2008                 conf->bss[0] = NULL;
2009                 hostapd_config_free(conf);
2010         } else {
2011                 /* Add a new iface with the first BSS */
2012                 new_iface = iface = hostapd_init(interfaces, config_fname);
2013                 if (!iface)
2014                         return NULL;
2015                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
2016                 iface->interfaces = interfaces;
2017                 bss_idx = 0;
2018         }
2019
2020         for (k = 0; k < debug; k++) {
2021                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
2022                         iface->bss[bss_idx]->conf->logger_stdout_level--;
2023         }
2024
2025         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
2026             !hostapd_drv_none(iface->bss[bss_idx])) {
2027                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
2028                            config_fname);
2029                 if (new_iface)
2030                         hostapd_interface_deinit_free(new_iface);
2031                 return NULL;
2032         }
2033
2034         return iface;
2035 }
2036
2037
2038 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
2039 {
2040         const struct wpa_driver_ops *driver;
2041         void *drv_priv;
2042
2043         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2044         if (iface == NULL)
2045                 return;
2046         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
2047                    __func__, (unsigned int) iface->num_bss,
2048                    (unsigned int) iface->conf->num_bss);
2049         driver = iface->bss[0]->driver;
2050         drv_priv = iface->bss[0]->drv_priv;
2051         hostapd_interface_deinit(iface);
2052         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2053                    __func__, driver, drv_priv);
2054         if (driver && driver->hapd_deinit && drv_priv) {
2055                 driver->hapd_deinit(drv_priv);
2056                 iface->bss[0]->drv_priv = NULL;
2057         }
2058         hostapd_interface_free(iface);
2059 }
2060
2061
2062 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
2063                                   void *drv_priv,
2064                                   struct hostapd_iface *hapd_iface)
2065 {
2066         size_t j;
2067
2068         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2069                    __func__, driver, drv_priv);
2070         if (driver && driver->hapd_deinit && drv_priv) {
2071                 driver->hapd_deinit(drv_priv);
2072                 for (j = 0; j < hapd_iface->num_bss; j++) {
2073                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
2074                                    __func__, (int) j,
2075                                    hapd_iface->bss[j]->drv_priv);
2076                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
2077                                 hapd_iface->bss[j]->drv_priv = NULL;
2078                 }
2079         }
2080 }
2081
2082
2083 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
2084 {
2085         size_t j;
2086
2087         if (hapd_iface->bss[0]->drv_priv != NULL) {
2088                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
2089                            hapd_iface->conf->bss[0]->iface);
2090                 return -1;
2091         }
2092
2093         wpa_printf(MSG_DEBUG, "Enable interface %s",
2094                    hapd_iface->conf->bss[0]->iface);
2095
2096         for (j = 0; j < hapd_iface->num_bss; j++)
2097                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2098         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2099                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
2100                 return -1;
2101         }
2102
2103         if (hapd_iface->interfaces == NULL ||
2104             hapd_iface->interfaces->driver_init == NULL ||
2105             hapd_iface->interfaces->driver_init(hapd_iface))
2106                 return -1;
2107
2108         if (hostapd_setup_interface(hapd_iface)) {
2109                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
2110                                       hapd_iface->bss[0]->drv_priv,
2111                                       hapd_iface);
2112                 return -1;
2113         }
2114
2115         return 0;
2116 }
2117
2118
2119 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
2120 {
2121         size_t j;
2122
2123         wpa_printf(MSG_DEBUG, "Reload interface %s",
2124                    hapd_iface->conf->bss[0]->iface);
2125         for (j = 0; j < hapd_iface->num_bss; j++)
2126                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2127         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2128                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
2129                 return -1;
2130         }
2131         hostapd_clear_old(hapd_iface);
2132         for (j = 0; j < hapd_iface->num_bss; j++)
2133                 hostapd_reload_bss(hapd_iface->bss[j]);
2134
2135         return 0;
2136 }
2137
2138
2139 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
2140 {
2141         size_t j;
2142         const struct wpa_driver_ops *driver;
2143         void *drv_priv;
2144
2145         if (hapd_iface == NULL)
2146                 return -1;
2147
2148         if (hapd_iface->bss[0]->drv_priv == NULL) {
2149                 wpa_printf(MSG_INFO, "Interface %s already disabled",
2150                            hapd_iface->conf->bss[0]->iface);
2151                 return -1;
2152         }
2153
2154         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2155         driver = hapd_iface->bss[0]->driver;
2156         drv_priv = hapd_iface->bss[0]->drv_priv;
2157
2158         hapd_iface->driver_ap_teardown =
2159                 !!(hapd_iface->drv_flags &
2160                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2161
2162         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
2163         for (j = 0; j < hapd_iface->num_bss; j++) {
2164                 struct hostapd_data *hapd = hapd_iface->bss[j];
2165                 hostapd_bss_deinit_no_free(hapd);
2166                 hostapd_free_hapd_data(hapd);
2167         }
2168
2169         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
2170
2171         /* From hostapd_cleanup_iface: These were initialized in
2172          * hostapd_setup_interface and hostapd_setup_interface_complete
2173          */
2174         hostapd_cleanup_iface_partial(hapd_iface);
2175
2176         wpa_printf(MSG_DEBUG, "Interface %s disabled",
2177                    hapd_iface->bss[0]->conf->iface);
2178         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
2179         return 0;
2180 }
2181
2182
2183 static struct hostapd_iface *
2184 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
2185 {
2186         struct hostapd_iface **iface, *hapd_iface;
2187
2188         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
2189                                  sizeof(struct hostapd_iface *));
2190         if (iface == NULL)
2191                 return NULL;
2192         interfaces->iface = iface;
2193         hapd_iface = interfaces->iface[interfaces->count] =
2194                 os_zalloc(sizeof(*hapd_iface));
2195         if (hapd_iface == NULL) {
2196                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2197                            "the interface", __func__);
2198                 return NULL;
2199         }
2200         interfaces->count++;
2201         hapd_iface->interfaces = interfaces;
2202
2203         return hapd_iface;
2204 }
2205
2206
2207 static struct hostapd_config *
2208 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
2209                      const char *ctrl_iface, const char *driver)
2210 {
2211         struct hostapd_bss_config *bss;
2212         struct hostapd_config *conf;
2213
2214         /* Allocates memory for bss and conf */
2215         conf = hostapd_config_defaults();
2216         if (conf == NULL) {
2217                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2218                                 "configuration", __func__);
2219                 return NULL;
2220         }
2221
2222         if (driver) {
2223                 int j;
2224
2225                 for (j = 0; wpa_drivers[j]; j++) {
2226                         if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
2227                                 conf->driver = wpa_drivers[j];
2228                                 goto skip;
2229                         }
2230                 }
2231
2232                 wpa_printf(MSG_ERROR,
2233                            "Invalid/unknown driver '%s' - registering the default driver",
2234                            driver);
2235         }
2236
2237         conf->driver = wpa_drivers[0];
2238         if (conf->driver == NULL) {
2239                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
2240                 hostapd_config_free(conf);
2241                 return NULL;
2242         }
2243
2244 skip:
2245         bss = conf->last_bss = conf->bss[0];
2246
2247         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
2248         bss->ctrl_interface = os_strdup(ctrl_iface);
2249         if (bss->ctrl_interface == NULL) {
2250                 hostapd_config_free(conf);
2251                 return NULL;
2252         }
2253
2254         /* Reading configuration file skipped, will be done in SET!
2255          * From reading the configuration till the end has to be done in
2256          * SET
2257          */
2258         return conf;
2259 }
2260
2261
2262 static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
2263                               struct hostapd_config *conf)
2264 {
2265         size_t i;
2266         struct hostapd_data *hapd;
2267
2268         hapd_iface->bss = os_calloc(conf->num_bss,
2269                                     sizeof(struct hostapd_data *));
2270         if (hapd_iface->bss == NULL)
2271                 return -1;
2272
2273         for (i = 0; i < conf->num_bss; i++) {
2274                 hapd = hapd_iface->bss[i] =
2275                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
2276                 if (hapd == NULL) {
2277                         while (i > 0) {
2278                                 i--;
2279                                 os_free(hapd_iface->bss[i]);
2280                                 hapd_iface->bss[i] = NULL;
2281                         }
2282                         os_free(hapd_iface->bss);
2283                         hapd_iface->bss = NULL;
2284                         return -1;
2285                 }
2286                 hapd->msg_ctx = hapd;
2287         }
2288
2289         hapd_iface->conf = conf;
2290         hapd_iface->num_bss = conf->num_bss;
2291
2292         return 0;
2293 }
2294
2295
2296 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
2297 {
2298         struct hostapd_config *conf = NULL;
2299         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
2300         struct hostapd_data *hapd;
2301         char *ptr;
2302         size_t i, j;
2303         const char *conf_file = NULL, *phy_name = NULL;
2304
2305         if (os_strncmp(buf, "bss_config=", 11) == 0) {
2306                 char *pos;
2307                 phy_name = buf + 11;
2308                 pos = os_strchr(phy_name, ':');
2309                 if (!pos)
2310                         return -1;
2311                 *pos++ = '\0';
2312                 conf_file = pos;
2313                 if (!os_strlen(conf_file))
2314                         return -1;
2315
2316                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
2317                                                         conf_file, 0);
2318                 if (!hapd_iface)
2319                         return -1;
2320                 for (j = 0; j < interfaces->count; j++) {
2321                         if (interfaces->iface[j] == hapd_iface)
2322                                 break;
2323                 }
2324                 if (j == interfaces->count) {
2325                         struct hostapd_iface **tmp;
2326                         tmp = os_realloc_array(interfaces->iface,
2327                                                interfaces->count + 1,
2328                                                sizeof(struct hostapd_iface *));
2329                         if (!tmp) {
2330                                 hostapd_interface_deinit_free(hapd_iface);
2331                                 return -1;
2332                         }
2333                         interfaces->iface = tmp;
2334                         interfaces->iface[interfaces->count++] = hapd_iface;
2335                         new_iface = hapd_iface;
2336                 }
2337
2338                 if (new_iface) {
2339                         if (interfaces->driver_init(hapd_iface))
2340                                 goto fail;
2341
2342                         if (hostapd_setup_interface(hapd_iface)) {
2343                                 hostapd_deinit_driver(
2344                                         hapd_iface->bss[0]->driver,
2345                                         hapd_iface->bss[0]->drv_priv,
2346                                         hapd_iface);
2347                                 goto fail;
2348                         }
2349                 } else {
2350                         /* Assign new BSS with bss[0]'s driver info */
2351                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
2352                         hapd->driver = hapd_iface->bss[0]->driver;
2353                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
2354                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
2355                                   ETH_ALEN);
2356
2357                         if (start_ctrl_iface_bss(hapd) < 0 ||
2358                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
2359                              hostapd_setup_bss(hapd, -1))) {
2360                                 hostapd_cleanup(hapd);
2361                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
2362                                 hapd_iface->conf->num_bss--;
2363                                 hapd_iface->num_bss--;
2364                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
2365                                            __func__, hapd, hapd->conf->iface);
2366                                 hostapd_config_free_bss(hapd->conf);
2367                                 hapd->conf = NULL;
2368                                 os_free(hapd);
2369                                 return -1;
2370                         }
2371                 }
2372                 return 0;
2373         }
2374
2375         ptr = os_strchr(buf, ' ');
2376         if (ptr == NULL)
2377                 return -1;
2378         *ptr++ = '\0';
2379
2380         if (os_strncmp(ptr, "config=", 7) == 0)
2381                 conf_file = ptr + 7;
2382
2383         for (i = 0; i < interfaces->count; i++) {
2384                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
2385                                buf)) {
2386                         wpa_printf(MSG_INFO, "Cannot add interface - it "
2387                                    "already exists");
2388                         return -1;
2389                 }
2390         }
2391
2392         hapd_iface = hostapd_iface_alloc(interfaces);
2393         if (hapd_iface == NULL) {
2394                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2395                            "for interface", __func__);
2396                 goto fail;
2397         }
2398         new_iface = hapd_iface;
2399
2400         if (conf_file && interfaces->config_read_cb) {
2401                 conf = interfaces->config_read_cb(conf_file);
2402                 if (conf && conf->bss)
2403                         os_strlcpy(conf->bss[0]->iface, buf,
2404                                    sizeof(conf->bss[0]->iface));
2405         } else {
2406                 char *driver = os_strchr(ptr, ' ');
2407
2408                 if (driver)
2409                         *driver++ = '\0';
2410                 conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
2411         }
2412
2413         if (conf == NULL || conf->bss == NULL) {
2414                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2415                            "for configuration", __func__);
2416                 goto fail;
2417         }
2418
2419         if (hostapd_data_alloc(hapd_iface, conf) < 0) {
2420                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2421                            "for hostapd", __func__);
2422                 goto fail;
2423         }
2424         conf = NULL;
2425
2426         if (start_ctrl_iface(hapd_iface) < 0)
2427                 goto fail;
2428
2429         wpa_printf(MSG_INFO, "Add interface '%s'",
2430                    hapd_iface->conf->bss[0]->iface);
2431
2432         return 0;
2433
2434 fail:
2435         if (conf)
2436                 hostapd_config_free(conf);
2437         if (hapd_iface) {
2438                 if (hapd_iface->bss) {
2439                         for (i = 0; i < hapd_iface->num_bss; i++) {
2440                                 hapd = hapd_iface->bss[i];
2441                                 if (!hapd)
2442                                         continue;
2443                                 if (hapd_iface->interfaces &&
2444                                     hapd_iface->interfaces->ctrl_iface_deinit)
2445                                         hapd_iface->interfaces->
2446                                                 ctrl_iface_deinit(hapd);
2447                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2448                                            __func__, hapd_iface->bss[i],
2449                                            hapd->conf->iface);
2450                                 hostapd_cleanup(hapd);
2451                                 os_free(hapd);
2452                                 hapd_iface->bss[i] = NULL;
2453                         }
2454                         os_free(hapd_iface->bss);
2455                         hapd_iface->bss = NULL;
2456                 }
2457                 if (new_iface) {
2458                         interfaces->count--;
2459                         interfaces->iface[interfaces->count] = NULL;
2460                 }
2461                 hostapd_cleanup_iface(hapd_iface);
2462         }
2463         return -1;
2464 }
2465
2466
2467 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
2468 {
2469         size_t i;
2470
2471         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
2472
2473         /* Remove hostapd_data only if it has already been initialized */
2474         if (idx < iface->num_bss) {
2475                 struct hostapd_data *hapd = iface->bss[idx];
2476
2477                 hostapd_bss_deinit(hapd);
2478                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2479                            __func__, hapd, hapd->conf->iface);
2480                 hostapd_config_free_bss(hapd->conf);
2481                 hapd->conf = NULL;
2482                 os_free(hapd);
2483
2484                 iface->num_bss--;
2485
2486                 for (i = idx; i < iface->num_bss; i++)
2487                         iface->bss[i] = iface->bss[i + 1];
2488         } else {
2489                 hostapd_config_free_bss(iface->conf->bss[idx]);
2490                 iface->conf->bss[idx] = NULL;
2491         }
2492
2493         iface->conf->num_bss--;
2494         for (i = idx; i < iface->conf->num_bss; i++)
2495                 iface->conf->bss[i] = iface->conf->bss[i + 1];
2496
2497         return 0;
2498 }
2499
2500
2501 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2502 {
2503         struct hostapd_iface *hapd_iface;
2504         size_t i, j, k = 0;
2505
2506         for (i = 0; i < interfaces->count; i++) {
2507                 hapd_iface = interfaces->iface[i];
2508                 if (hapd_iface == NULL)
2509                         return -1;
2510                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2511                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2512                         hapd_iface->driver_ap_teardown =
2513                                 !!(hapd_iface->drv_flags &
2514                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2515
2516                         hostapd_interface_deinit_free(hapd_iface);
2517                         k = i;
2518                         while (k < (interfaces->count - 1)) {
2519                                 interfaces->iface[k] =
2520                                         interfaces->iface[k + 1];
2521                                 k++;
2522                         }
2523                         interfaces->count--;
2524                         return 0;
2525                 }
2526
2527                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2528                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2529                                 hapd_iface->driver_ap_teardown =
2530                                         !(hapd_iface->drv_flags &
2531                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2532                                 return hostapd_remove_bss(hapd_iface, j);
2533                         }
2534                 }
2535         }
2536         return -1;
2537 }
2538
2539
2540 /**
2541  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2542  * @hapd: Pointer to BSS data
2543  * @sta: Pointer to the associated STA data
2544  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2545  *
2546  * This function will be called whenever a station associates with the AP. It
2547  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2548  * from drv_callbacks.c based on driver events for drivers that take care of
2549  * management frames (IEEE 802.11 authentication and association) internally.
2550  */
2551 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2552                            int reassoc)
2553 {
2554         if (hapd->tkip_countermeasures) {
2555                 hostapd_drv_sta_deauth(hapd, sta->addr,
2556                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2557                 return;
2558         }
2559
2560         hostapd_prune_associations(hapd, sta->addr);
2561
2562         /* IEEE 802.11F (IAPP) */
2563         if (hapd->conf->ieee802_11f)
2564                 iapp_new_station(hapd->iapp, sta);
2565
2566 #ifdef CONFIG_P2P
2567         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2568                 sta->no_p2p_set = 1;
2569                 hapd->num_sta_no_p2p++;
2570                 if (hapd->num_sta_no_p2p == 1)
2571                         hostapd_p2p_non_p2p_sta_connected(hapd);
2572         }
2573 #endif /* CONFIG_P2P */
2574
2575         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2576          * IEEE 802.1X/WPA code will start accounting after the station has
2577          * been authorized. */
2578         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2579                 ap_sta_set_authorized(hapd, sta, 1);
2580                 os_get_reltime(&sta->connected_time);
2581                 accounting_sta_start(hapd, sta);
2582         }
2583
2584         /* Start IEEE 802.1X authentication process for new stations */
2585         ieee802_1x_new_station(hapd, sta);
2586         if (reassoc) {
2587                 if (sta->auth_alg != WLAN_AUTH_FT &&
2588                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2589                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2590         } else
2591                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2592
2593         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2594                 wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
2595                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
2596                            __func__, MAC2STR(sta->addr),
2597                            hapd->conf->ap_max_inactivity);
2598                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2599                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2600                                        ap_handle_timer, hapd, sta);
2601         }
2602 }
2603
2604
2605 const char * hostapd_state_text(enum hostapd_iface_state s)
2606 {
2607         switch (s) {
2608         case HAPD_IFACE_UNINITIALIZED:
2609                 return "UNINITIALIZED";
2610         case HAPD_IFACE_DISABLED:
2611                 return "DISABLED";
2612         case HAPD_IFACE_COUNTRY_UPDATE:
2613                 return "COUNTRY_UPDATE";
2614         case HAPD_IFACE_ACS:
2615                 return "ACS";
2616         case HAPD_IFACE_HT_SCAN:
2617                 return "HT_SCAN";
2618         case HAPD_IFACE_DFS:
2619                 return "DFS";
2620         case HAPD_IFACE_ENABLED:
2621                 return "ENABLED";
2622         }
2623
2624         return "UNKNOWN";
2625 }
2626
2627
2628 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2629 {
2630         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2631                    iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2632                    hostapd_state_text(s));
2633         iface->state = s;
2634 }
2635
2636
2637 #ifdef NEED_AP_MLME
2638
2639 static void free_beacon_data(struct beacon_data *beacon)
2640 {
2641         os_free(beacon->head);
2642         beacon->head = NULL;
2643         os_free(beacon->tail);
2644         beacon->tail = NULL;
2645         os_free(beacon->probe_resp);
2646         beacon->probe_resp = NULL;
2647         os_free(beacon->beacon_ies);
2648         beacon->beacon_ies = NULL;
2649         os_free(beacon->proberesp_ies);
2650         beacon->proberesp_ies = NULL;
2651         os_free(beacon->assocresp_ies);
2652         beacon->assocresp_ies = NULL;
2653 }
2654
2655
2656 static int hostapd_build_beacon_data(struct hostapd_data *hapd,
2657                                      struct beacon_data *beacon)
2658 {
2659         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2660         struct wpa_driver_ap_params params;
2661         int ret;
2662
2663         os_memset(beacon, 0, sizeof(*beacon));
2664         ret = ieee802_11_build_ap_params(hapd, &params);
2665         if (ret < 0)
2666                 return ret;
2667
2668         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2669                                          &proberesp_extra,
2670                                          &assocresp_extra);
2671         if (ret)
2672                 goto free_ap_params;
2673
2674         ret = -1;
2675         beacon->head = os_malloc(params.head_len);
2676         if (!beacon->head)
2677                 goto free_ap_extra_ies;
2678
2679         os_memcpy(beacon->head, params.head, params.head_len);
2680         beacon->head_len = params.head_len;
2681
2682         beacon->tail = os_malloc(params.tail_len);
2683         if (!beacon->tail)
2684                 goto free_beacon;
2685
2686         os_memcpy(beacon->tail, params.tail, params.tail_len);
2687         beacon->tail_len = params.tail_len;
2688
2689         if (params.proberesp != NULL) {
2690                 beacon->probe_resp = os_malloc(params.proberesp_len);
2691                 if (!beacon->probe_resp)
2692                         goto free_beacon;
2693
2694                 os_memcpy(beacon->probe_resp, params.proberesp,
2695                           params.proberesp_len);
2696                 beacon->probe_resp_len = params.proberesp_len;
2697         }
2698
2699         /* copy the extra ies */
2700         if (beacon_extra) {
2701                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2702                 if (!beacon->beacon_ies)
2703                         goto free_beacon;
2704
2705                 os_memcpy(beacon->beacon_ies,
2706                           beacon_extra->buf, wpabuf_len(beacon_extra));
2707                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2708         }
2709
2710         if (proberesp_extra) {
2711                 beacon->proberesp_ies =
2712                         os_malloc(wpabuf_len(proberesp_extra));
2713                 if (!beacon->proberesp_ies)
2714                         goto free_beacon;
2715
2716                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2717                           wpabuf_len(proberesp_extra));
2718                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2719         }
2720
2721         if (assocresp_extra) {
2722                 beacon->assocresp_ies =
2723                         os_malloc(wpabuf_len(assocresp_extra));
2724                 if (!beacon->assocresp_ies)
2725                         goto free_beacon;
2726
2727                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2728                           wpabuf_len(assocresp_extra));
2729                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2730         }
2731
2732         ret = 0;
2733 free_beacon:
2734         /* if the function fails, the caller should not free beacon data */
2735         if (ret)
2736                 free_beacon_data(beacon);
2737
2738 free_ap_extra_ies:
2739         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2740                                   assocresp_extra);
2741 free_ap_params:
2742         ieee802_11_free_ap_params(&params);
2743         return ret;
2744 }
2745
2746
2747 /*
2748  * TODO: This flow currently supports only changing channel and width within
2749  * the same hw_mode. Any other changes to MAC parameters or provided settings
2750  * are not supported.
2751  */
2752 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2753                                       struct hostapd_config *conf,
2754                                       struct hostapd_freq_params *params,
2755                                       struct hostapd_freq_params *old_params)
2756 {
2757         int channel;
2758
2759         if (!params->channel) {
2760                 /* check if the new channel is supported by hw */
2761                 params->channel = hostapd_hw_get_channel(hapd, params->freq);
2762         }
2763
2764         channel = params->channel;
2765         if (!channel)
2766                 return -1;
2767
2768         /* if a pointer to old_params is provided we save previous state */
2769         if (old_params &&
2770             hostapd_set_freq_params(old_params, conf->hw_mode,
2771                                     hostapd_hw_get_freq(hapd, conf->channel),
2772                                     conf->channel, conf->ieee80211n,
2773                                     conf->ieee80211ac,
2774                                     conf->secondary_channel,
2775                                     conf->vht_oper_chwidth,
2776                                     conf->vht_oper_centr_freq_seg0_idx,
2777                                     conf->vht_oper_centr_freq_seg1_idx,
2778                                     conf->vht_capab))
2779                 return -1;
2780
2781         switch (params->bandwidth) {
2782         case 0:
2783         case 20:
2784         case 40:
2785                 conf->vht_oper_chwidth = VHT_CHANWIDTH_USE_HT;
2786                 break;
2787         case 80:
2788                 if (params->center_freq2)
2789                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80P80MHZ;
2790                 else
2791                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80MHZ;
2792                 break;
2793         case 160:
2794                 conf->vht_oper_chwidth = VHT_CHANWIDTH_160MHZ;
2795                 break;
2796         default:
2797                 return -1;
2798         }
2799
2800         conf->channel = channel;
2801         conf->ieee80211n = params->ht_enabled;
2802         conf->secondary_channel = params->sec_channel_offset;
2803         conf->vht_oper_centr_freq_seg0_idx =
2804                 hostapd_hw_get_channel(hapd, params->center_freq1);
2805         conf->vht_oper_centr_freq_seg1_idx =
2806                 hostapd_hw_get_channel(hapd, params->center_freq2);
2807
2808         /* TODO: maybe call here hostapd_config_check here? */
2809
2810         return 0;
2811 }
2812
2813
2814 static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
2815                                      struct csa_settings *settings)
2816 {
2817         struct hostapd_iface *iface = hapd->iface;
2818         struct hostapd_freq_params old_freq;
2819         int ret;
2820
2821         os_memset(&old_freq, 0, sizeof(old_freq));
2822         if (!iface || !iface->freq || hapd->csa_in_progress)
2823                 return -1;
2824
2825         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2826                                          &settings->freq_params,
2827                                          &old_freq);
2828         if (ret)
2829                 return ret;
2830
2831         ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
2832
2833         /* change back the configuration */
2834         hostapd_change_config_freq(iface->bss[0], iface->conf,
2835                                    &old_freq, NULL);
2836
2837         if (ret)
2838                 return ret;
2839
2840         /* set channel switch parameters for csa ie */
2841         hapd->cs_freq_params = settings->freq_params;
2842         hapd->cs_count = settings->cs_count;
2843         hapd->cs_block_tx = settings->block_tx;
2844
2845         ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
2846         if (ret) {
2847                 free_beacon_data(&settings->beacon_after);
2848                 return ret;
2849         }
2850
2851         settings->counter_offset_beacon[0] = hapd->cs_c_off_beacon;
2852         settings->counter_offset_presp[0] = hapd->cs_c_off_proberesp;
2853
2854         return 0;
2855 }
2856
2857
2858 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2859 {
2860         os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
2861         hapd->cs_count = 0;
2862         hapd->cs_block_tx = 0;
2863         hapd->cs_c_off_beacon = 0;
2864         hapd->cs_c_off_proberesp = 0;
2865         hapd->csa_in_progress = 0;
2866 }
2867
2868
2869 int hostapd_switch_channel(struct hostapd_data *hapd,
2870                            struct csa_settings *settings)
2871 {
2872         int ret;
2873
2874         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
2875                 wpa_printf(MSG_INFO, "CSA is not supported");
2876                 return -1;
2877         }
2878
2879         ret = hostapd_fill_csa_settings(hapd, settings);
2880         if (ret)
2881                 return ret;
2882
2883         ret = hostapd_drv_switch_channel(hapd, settings);
2884         free_beacon_data(&settings->beacon_csa);
2885         free_beacon_data(&settings->beacon_after);
2886
2887         if (ret) {
2888                 /* if we failed, clean cs parameters */
2889                 hostapd_cleanup_cs_params(hapd);
2890                 return ret;
2891         }
2892
2893         hapd->csa_in_progress = 1;
2894         return 0;
2895 }
2896
2897
2898 void
2899 hostapd_switch_channel_fallback(struct hostapd_iface *iface,
2900                                 const struct hostapd_freq_params *freq_params)
2901 {
2902         int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
2903         unsigned int i;
2904
2905         wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
2906
2907         if (freq_params->center_freq1)
2908                 vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
2909         if (freq_params->center_freq2)
2910                 vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
2911
2912         switch (freq_params->bandwidth) {
2913         case 0:
2914         case 20:
2915         case 40:
2916                 vht_bw = VHT_CHANWIDTH_USE_HT;
2917                 break;
2918         case 80:
2919                 if (freq_params->center_freq2)
2920                         vht_bw = VHT_CHANWIDTH_80P80MHZ;
2921                 else
2922                         vht_bw = VHT_CHANWIDTH_80MHZ;
2923                 break;
2924         case 160:
2925                 vht_bw = VHT_CHANWIDTH_160MHZ;
2926                 break;
2927         default:
2928                 wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
2929                            freq_params->bandwidth);
2930                 break;
2931         }
2932
2933         iface->freq = freq_params->freq;
2934         iface->conf->channel = freq_params->channel;
2935         iface->conf->secondary_channel = freq_params->sec_channel_offset;
2936         iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
2937         iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
2938         iface->conf->vht_oper_chwidth = vht_bw;
2939         iface->conf->ieee80211n = freq_params->ht_enabled;
2940         iface->conf->ieee80211ac = freq_params->vht_enabled;
2941
2942         /*
2943          * cs_params must not be cleared earlier because the freq_params
2944          * argument may actually point to one of these.
2945          */
2946         for (i = 0; i < iface->num_bss; i++)
2947                 hostapd_cleanup_cs_params(iface->bss[i]);
2948
2949         hostapd_disable_iface(iface);
2950         hostapd_enable_iface(iface);
2951 }
2952
2953
2954 struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
2955                                         const char *ifname)
2956 {
2957         size_t i, j;
2958
2959         for (i = 0; i < interfaces->count; i++) {
2960                 struct hostapd_iface *iface = interfaces->iface[i];
2961
2962                 for (j = 0; j < iface->num_bss; j++) {
2963                         struct hostapd_data *hapd = iface->bss[j];
2964
2965                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
2966                                 return hapd;
2967                 }
2968         }
2969
2970         return NULL;
2971 }
2972
2973 #endif /* NEED_AP_MLME */
2974
2975
2976 void hostapd_periodic_iface(struct hostapd_iface *iface)
2977 {
2978         size_t i;
2979
2980         ap_list_timer(iface);
2981
2982         for (i = 0; i < iface->num_bss; i++) {
2983                 struct hostapd_data *hapd = iface->bss[i];
2984
2985                 if (!hapd->started)
2986                         continue;
2987
2988 #ifndef CONFIG_NO_RADIUS
2989                 hostapd_acl_expire(hapd);
2990 #endif /* CONFIG_NO_RADIUS */
2991         }
2992 }