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 != 16) {
 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), "%016lX",
 687                                     (long unsigned int) sta->acct_session_id);
 688                         if (os_memcmp(attr->acct_session_id, buf, 16) != 0)
 689                                 sta->radius_das_match = 0;
 690                         else
 691                                 count++;
 692                 }
 693
 694                 if (count == 0) {
 695                         wpa_printf(MSG_DEBUG,
 696                                    "RADIUS DAS: No matches remaining after Acct-Session-Id check");
 697                         return NULL;
 698                 }
 699                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Acct-Session-Id match");
 700         }
 701
 702         if (attr->acct_multi_session_id) {
 703                 num_attr++;
 704                 if (attr->acct_multi_session_id_len != 16) {
 705                         wpa_printf(MSG_DEBUG,
 706                                    "RADIUS DAS: Acct-Multi-Session-Id cannot match");
 707                         return NULL;
 708                 }
 709                 count = 0;
 710
 711                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 712                         if (!sta->radius_das_match)
 713                                 continue;
 714                         if (!sta->eapol_sm ||
 715                             !sta->eapol_sm->acct_multi_session_id) {
 716                                 sta->radius_das_match = 0;
 717                                 continue;
 718                         }
 719                         os_snprintf(buf, sizeof(buf), "%016lX",
 720                                     (long unsigned int)
 721                                     sta->eapol_sm->acct_multi_session_id);
 722                         if (os_memcmp(attr->acct_multi_session_id, buf, 16) !=
 723                             0)
 724                                 sta->radius_das_match = 0;
 725                         else
 726                                 count++;
 727                 }
 728
 729                 if (count == 0) {
 730                         wpa_printf(MSG_DEBUG,
 731                                    "RADIUS DAS: No matches remaining after Acct-Multi-Session-Id check");
 732                         return NULL;
 733                 }
 734                 wpa_printf(MSG_DEBUG,
 735                            "RADIUS DAS: Acct-Multi-Session-Id match");
 736         }
 737
 738         if (attr->cui) {
 739                 num_attr++;
 740                 count = 0;
 741
 742                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 743                         struct wpabuf *cui;
 744
 745                         if (!sta->radius_das_match)
 746                                 continue;
 747                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 748                         if (!cui || wpabuf_len(cui) != attr->cui_len ||
 749                             os_memcmp(wpabuf_head(cui), attr->cui,
 750                                       attr->cui_len) != 0)
 751                                 sta->radius_das_match = 0;
 752                         else
 753                                 count++;
 754                 }
 755
 756                 if (count == 0) {
 757                         wpa_printf(MSG_DEBUG,
 758                                    "RADIUS DAS: No matches remaining after Chargeable-User-Identity check");
 759                         return NULL;
 760                 }
 761                 wpa_printf(MSG_DEBUG,
 762                            "RADIUS DAS: Chargeable-User-Identity match");
 763         }
 764
 765         if (attr->user_name) {
 766                 num_attr++;
 767                 count = 0;
 768
 769                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 770                         u8 *identity;
 771                         size_t identity_len;
 772
 773                         if (!sta->radius_das_match)
 774                                 continue;
 775                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 776                                                            &identity_len);
 777                         if (!identity ||
 778                             identity_len != attr->user_name_len ||
 779                             os_memcmp(identity, attr->user_name, identity_len)
 780                             != 0)
 781                                 sta->radius_das_match = 0;
 782                         else
 783                                 count++;
 784                 }
 785
 786                 if (count == 0) {
 787                         wpa_printf(MSG_DEBUG,
 788                                    "RADIUS DAS: No matches remaining after User-Name check");
 789                         return NULL;
 790                 }
 791                 wpa_printf(MSG_DEBUG,
 792                            "RADIUS DAS: User-Name match");
 793         }
 794
 795         if (num_attr == 0) {
 796                 /*
 797                  * In theory, we could match all current associations, but it
 798                  * seems safer to just reject requests that do not include any
 799                  * session identification attributes.
 800                  */
 801                 wpa_printf(MSG_DEBUG,
 802                            "RADIUS DAS: No session identification attributes included");
 803                 return NULL;
 804         }
 805
 806         selected = NULL;
 807         for (sta = hapd->sta_list; sta; sta = sta->next) {
 808                 if (sta->radius_das_match) {
 809                         if (selected) {
 810                                 *multi = 1;
 811                                 return NULL;
 812                         }
 813                         selected = sta;
 814                 }
 815         }
 816
 817         return selected;
 818 }
 819
 820
 821 static int hostapd_das_disconnect_pmksa(struct hostapd_data *hapd,
 822                                         struct radius_das_attrs *attr)
 823 {
 824         if (!hapd->wpa_auth)
 825                 return -1;
 826         return wpa_auth_radius_das_disconnect_pmksa(hapd->wpa_auth, attr);
 827 }
 828
 829
 830 static enum radius_das_res
 831 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 832 {
 833         struct hostapd_data *hapd = ctx;
 834         struct sta_info *sta;
 835         int multi;
 836
 837         if (hostapd_das_nas_mismatch(hapd, attr))
 838                 return RADIUS_DAS_NAS_MISMATCH;
 839
 840         sta = hostapd_das_find_sta(hapd, attr, &multi);
 841         if (sta == NULL) {
 842                 if (multi) {
 843                         wpa_printf(MSG_DEBUG,
 844                                    "RADIUS DAS: Multiple sessions match - not supported");
 845                         return RADIUS_DAS_MULTI_SESSION_MATCH;
 846                 }
 847                 if (hostapd_das_disconnect_pmksa(hapd, attr) == 0) {
 848                         wpa_printf(MSG_DEBUG,
 849                                    "RADIUS DAS: PMKSA cache entry matched");
 850                         return RADIUS_DAS_SUCCESS;
 851                 }
 852                 wpa_printf(MSG_DEBUG, "RADIUS DAS: No matching session found");
 853                 return RADIUS_DAS_SESSION_NOT_FOUND;
 854         }
 855
 856         wpa_printf(MSG_DEBUG, "RADIUS DAS: Found a matching session " MACSTR
 857                    " - disconnecting", MAC2STR(sta->addr));
 858         wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
 859
 860         hostapd_drv_sta_deauth(hapd, sta->addr,
 861                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 862         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 863
 864         return RADIUS_DAS_SUCCESS;
 865 }
 866
 867 #endif /* CONFIG_NO_RADIUS */
 868
 869
 870 /**
 871  * hostapd_setup_bss - Per-BSS setup (initialization)
 872  * @hapd: Pointer to BSS data
 873  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
 874  *      but interface may exist
 875  *
 876  * This function is used to initialize all per-BSS data structures and
 877  * resources. This gets called in a loop for each BSS when an interface is
 878  * initialized. Most of the modules that are initialized here will be
 879  * deinitialized in hostapd_cleanup().
 880  */
 881 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 882 {
 883         struct hostapd_bss_config *conf = hapd->conf;
 884         u8 ssid[SSID_MAX_LEN + 1];
 885         int ssid_len, set_ssid;
 886         char force_ifname[IFNAMSIZ];
 887         u8 if_addr[ETH_ALEN];
 888         int flush_old_stations = 1;
 889
 890         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 891                    __func__, hapd, conf->iface, first);
 892
 893 #ifdef EAP_SERVER_TNC
 894         if (conf->tnc && tncs_global_init() < 0) {
 895                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 896                 return -1;
 897         }
 898 #endif /* EAP_SERVER_TNC */
 899
 900         if (hapd->started) {
 901                 wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
 902                            __func__, conf->iface);
 903                 return -1;
 904         }
 905         hapd->started = 1;
 906
 907         if (!first || first == -1) {
 908                 if (hostapd_mac_comp_empty(conf->bssid) == 0) {
 909                         /* Allocate the next available BSSID. */
 910                         do {
 911                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 912                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 913                 } else {
 914                         /* Allocate the configured BSSID. */
 915                         os_memcpy(hapd->own_addr, conf->bssid, ETH_ALEN);
 916
 917                         if (hostapd_mac_comp(hapd->own_addr,
 918                                              hapd->iface->bss[0]->own_addr) ==
 919                             0) {
 920                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 921                                            "BSSID set to the MAC address of "
 922                                            "the radio", conf->iface);
 923                                 return -1;
 924                         }
 925                 }
 926
 927                 hapd->interface_added = 1;
 928                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 929                                    conf->iface, hapd->own_addr, hapd,
 930                                    &hapd->drv_priv, force_ifname, if_addr,
 931                                    conf->bridge[0] ? conf->bridge : NULL,
 932                                    first == -1)) {
 933                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 934                                    MACSTR ")", MAC2STR(hapd->own_addr));
 935                         hapd->interface_added = 0;
 936                         return -1;
 937                 }
 938         }
 939
 940         if (conf->wmm_enabled < 0)
 941                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 942
 943 #ifdef CONFIG_MESH
 944         if (hapd->iface->mconf == NULL)
 945                 flush_old_stations = 0;
 946 #endif /* CONFIG_MESH */
 947
 948         if (flush_old_stations)
 949                 hostapd_flush_old_stations(hapd,
 950                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 951         hostapd_set_privacy(hapd, 0);
 952
 953         hostapd_broadcast_wep_clear(hapd);
 954         if (hostapd_setup_encryption(conf->iface, hapd))
 955                 return -1;
 956
 957         /*
 958          * Fetch the SSID from the system and use it or,
 959          * if one was specified in the config file, verify they
 960          * match.
 961          */
 962         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 963         if (ssid_len < 0) {
 964                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 965                 return -1;
 966         }
 967         if (conf->ssid.ssid_set) {
 968                 /*
 969                  * If SSID is specified in the config file and it differs
 970                  * from what is being used then force installation of the
 971                  * new SSID.
 972                  */
 973                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 974                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 975         } else {
 976                 /*
 977                  * No SSID in the config file; just use the one we got
 978                  * from the system.
 979                  */
 980                 set_ssid = 0;
 981                 conf->ssid.ssid_len = ssid_len;
 982                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 983         }
 984
 985         if (!hostapd_drv_none(hapd)) {
 986                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 987                            " and ssid \"%s\"",
 988                            conf->iface, MAC2STR(hapd->own_addr),
 989                            wpa_ssid_txt(conf->ssid.ssid, conf->ssid.ssid_len));
 990         }
 991
 992         if (hostapd_setup_wpa_psk(conf)) {
 993                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 994                 return -1;
 995         }
 996
 997         /* Set SSID for the kernel driver (to be used in beacon and probe
 998          * response frames) */
 999         if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
1000                                          conf->ssid.ssid_len)) {
1001                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
1002                 return -1;
1003         }
1004
1005         if (wpa_debug_level <= MSG_MSGDUMP)
1006                 conf->radius->msg_dumps = 1;
1007 #ifndef CONFIG_NO_RADIUS
1008         hapd->radius = radius_client_init(hapd, conf->radius);
1009         if (hapd->radius == NULL) {
1010                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
1011                 return -1;
1012         }
1013
1014         if (conf->radius_das_port) {
1015                 struct radius_das_conf das_conf;
1016                 os_memset(&das_conf, 0, sizeof(das_conf));
1017                 das_conf.port = conf->radius_das_port;
1018                 das_conf.shared_secret = conf->radius_das_shared_secret;
1019                 das_conf.shared_secret_len =
1020                         conf->radius_das_shared_secret_len;
1021                 das_conf.client_addr = &conf->radius_das_client_addr;
1022                 das_conf.time_window = conf->radius_das_time_window;
1023                 das_conf.require_event_timestamp =
1024                         conf->radius_das_require_event_timestamp;
1025                 das_conf.ctx = hapd;
1026                 das_conf.disconnect = hostapd_das_disconnect;
1027                 hapd->radius_das = radius_das_init(&das_conf);
1028                 if (hapd->radius_das == NULL) {
1029                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
1030                                    "failed.");
1031                         return -1;
1032                 }
1033         }
1034 #endif /* CONFIG_NO_RADIUS */
1035
1036         if (hostapd_acl_init(hapd)) {
1037                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
1038                 return -1;
1039         }
1040         if (hostapd_init_wps(hapd, conf))
1041                 return -1;
1042
1043         if (authsrv_init(hapd) < 0)
1044                 return -1;
1045
1046         if (ieee802_1x_init(hapd)) {
1047                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
1048                 return -1;
1049         }
1050
1051         if ((conf->wpa || conf->osen) && hostapd_setup_wpa(hapd))
1052                 return -1;
1053
1054         if (accounting_init(hapd)) {
1055                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
1056                 return -1;
1057         }
1058
1059         if (conf->ieee802_11f &&
1060             (hapd->iapp = iapp_init(hapd, conf->iapp_iface)) == NULL) {
1061                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
1062                            "failed.");
1063                 return -1;
1064         }
1065
1066 #ifdef CONFIG_INTERWORKING
1067         if (gas_serv_init(hapd)) {
1068                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
1069                 return -1;
1070         }
1071
1072         if (conf->qos_map_set_len &&
1073             hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
1074                                     conf->qos_map_set_len)) {
1075                 wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
1076                 return -1;
1077         }
1078 #endif /* CONFIG_INTERWORKING */
1079
1080         if (conf->bss_load_update_period && bss_load_update_init(hapd)) {
1081                 wpa_printf(MSG_ERROR, "BSS Load initialization failed");
1082                 return -1;
1083         }
1084
1085         if (conf->proxy_arp) {
1086                 if (x_snoop_init(hapd)) {
1087                         wpa_printf(MSG_ERROR,
1088                                    "Generic snooping infrastructure initialization failed");
1089                         return -1;
1090                 }
1091
1092                 if (dhcp_snoop_init(hapd)) {
1093                         wpa_printf(MSG_ERROR,
1094                                    "DHCP snooping initialization failed");
1095                         return -1;
1096                 }
1097
1098                 if (ndisc_snoop_init(hapd)) {
1099                         wpa_printf(MSG_ERROR,
1100                                    "Neighbor Discovery snooping initialization failed");
1101                         return -1;
1102                 }
1103         }
1104
1105         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
1106                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
1107                 return -1;
1108         }
1109
1110         if (!conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
1111                 return -1;
1112
1113         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
1114                 return -1;
1115
1116         if (hapd->driver && hapd->driver->set_operstate)
1117                 hapd->driver->set_operstate(hapd->drv_priv, 1);
1118
1119         return 0;
1120 }
1121
1122
1123 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
1124 {
1125         struct hostapd_data *hapd = iface->bss[0];
1126         int i;
1127         struct hostapd_tx_queue_params *p;
1128
1129 #ifdef CONFIG_MESH
1130         if (iface->mconf == NULL)
1131                 return;
1132 #endif /* CONFIG_MESH */
1133
1134         for (i = 0; i < NUM_TX_QUEUES; i++) {
1135                 p = &iface->conf->tx_queue[i];
1136
1137                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
1138                                                 p->cwmax, p->burst)) {
1139                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
1140                                    "parameters for queue %d.", i);
1141                         /* Continue anyway */
1142                 }
1143         }
1144 }
1145
1146
1147 static int hostapd_set_acl_list(struct hostapd_data *hapd,
1148                                 struct mac_acl_entry *mac_acl,
1149                                 int n_entries, u8 accept_acl)
1150 {
1151         struct hostapd_acl_params *acl_params;
1152         int i, err;
1153
1154         acl_params = os_zalloc(sizeof(*acl_params) +
1155                                (n_entries * sizeof(acl_params->mac_acl[0])));
1156         if (!acl_params)
1157                 return -ENOMEM;
1158
1159         for (i = 0; i < n_entries; i++)
1160                 os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
1161                           ETH_ALEN);
1162
1163         acl_params->acl_policy = accept_acl;
1164         acl_params->num_mac_acl = n_entries;
1165
1166         err = hostapd_drv_set_acl(hapd, acl_params);
1167
1168         os_free(acl_params);
1169
1170         return err;
1171 }
1172
1173
1174 static void hostapd_set_acl(struct hostapd_data *hapd)
1175 {
1176         struct hostapd_config *conf = hapd->iconf;
1177         int err;
1178         u8 accept_acl;
1179
1180         if (hapd->iface->drv_max_acl_mac_addrs == 0)
1181                 return;
1182
1183         if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
1184                 accept_acl = 1;
1185                 err = hostapd_set_acl_list(hapd, conf->bss[0]->accept_mac,
1186                                            conf->bss[0]->num_accept_mac,
1187                                            accept_acl);
1188                 if (err) {
1189                         wpa_printf(MSG_DEBUG, "Failed to set accept acl");
1190                         return;
1191                 }
1192         } else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
1193                 accept_acl = 0;
1194                 err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
1195                                            conf->bss[0]->num_deny_mac,
1196                                            accept_acl);
1197                 if (err) {
1198                         wpa_printf(MSG_DEBUG, "Failed to set deny acl");
1199                         return;
1200                 }
1201         }
1202 }
1203
1204
1205 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
1206 {
1207         if (!hapd->iface->interfaces ||
1208             !hapd->iface->interfaces->ctrl_iface_init)
1209                 return 0;
1210
1211         if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
1212                 wpa_printf(MSG_ERROR,
1213                            "Failed to setup control interface for %s",
1214                            hapd->conf->iface);
1215                 return -1;
1216         }
1217
1218         return 0;
1219 }
1220
1221
1222 static int start_ctrl_iface(struct hostapd_iface *iface)
1223 {
1224         size_t i;
1225
1226         if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
1227                 return 0;
1228
1229         for (i = 0; i < iface->num_bss; i++) {
1230                 struct hostapd_data *hapd = iface->bss[i];
1231                 if (iface->interfaces->ctrl_iface_init(hapd)) {
1232                         wpa_printf(MSG_ERROR,
1233                                    "Failed to setup control interface for %s",
1234                                    hapd->conf->iface);
1235                         return -1;
1236                 }
1237         }
1238
1239         return 0;
1240 }
1241
1242
1243 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
1244 {
1245         struct hostapd_iface *iface = eloop_ctx;
1246
1247         if (!iface->wait_channel_update) {
1248                 wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
1249                 return;
1250         }
1251
1252         /*
1253          * It is possible that the existing channel list is acceptable, so try
1254          * to proceed.
1255          */
1256         wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
1257         setup_interface2(iface);
1258 }
1259
1260
1261 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1262 {
1263         if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1264                 return;
1265
1266         wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1267         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1268         setup_interface2(iface);
1269 }
1270
1271
1272 static int setup_interface(struct hostapd_iface *iface)
1273 {
1274         struct hostapd_data *hapd = iface->bss[0];
1275         size_t i;
1276
1277         /*
1278          * It is possible that setup_interface() is called after the interface
1279          * was disabled etc., in which case driver_ap_teardown is possibly set
1280          * to 1. Clear it here so any other key/station deletion, which is not
1281          * part of a teardown flow, would also call the relevant driver
1282          * callbacks.
1283          */
1284         iface->driver_ap_teardown = 0;
1285
1286         if (!iface->phy[0]) {
1287                 const char *phy = hostapd_drv_get_radio_name(hapd);
1288                 if (phy) {
1289                         wpa_printf(MSG_DEBUG, "phy: %s", phy);
1290                         os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1291                 }
1292         }
1293
1294         /*
1295          * Make sure that all BSSes get configured with a pointer to the same
1296          * driver interface.
1297          */
1298         for (i = 1; i < iface->num_bss; i++) {
1299                 iface->bss[i]->driver = hapd->driver;
1300                 iface->bss[i]->drv_priv = hapd->drv_priv;
1301         }
1302
1303         if (hostapd_validate_bssid_configuration(iface))
1304                 return -1;
1305
1306         /*
1307          * Initialize control interfaces early to allow external monitoring of
1308          * channel setup operations that may take considerable amount of time
1309          * especially for DFS cases.
1310          */
1311         if (start_ctrl_iface(iface))
1312                 return -1;
1313
1314         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1315                 char country[4], previous_country[4];
1316
1317                 hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1318                 if (hostapd_get_country(hapd, previous_country) < 0)
1319                         previous_country[0] = '\0';
1320
1321                 os_memcpy(country, hapd->iconf->country, 3);
1322                 country[3] = '\0';
1323                 if (hostapd_set_country(hapd, country) < 0) {
1324                         wpa_printf(MSG_ERROR, "Failed to set country code");
1325                         return -1;
1326                 }
1327
1328                 wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1329                            previous_country, country);
1330
1331                 if (os_strncmp(previous_country, country, 2) != 0) {
1332                         wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1333                         iface->wait_channel_update = 1;
1334                         eloop_register_timeout(5, 0,
1335                                                channel_list_update_timeout,
1336                                                iface, NULL);
1337                         return 0;
1338                 }
1339         }
1340
1341         return setup_interface2(iface);
1342 }
1343
1344
1345 static int setup_interface2(struct hostapd_iface *iface)
1346 {
1347         iface->wait_channel_update = 0;
1348
1349         if (hostapd_get_hw_features(iface)) {
1350                 /* Not all drivers support this yet, so continue without hw
1351                  * feature data. */
1352         } else {
1353                 int ret = hostapd_select_hw_mode(iface);
1354                 if (ret < 0) {
1355                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1356                                    "channel. (%d)", ret);
1357                         goto fail;
1358                 }
1359                 if (ret == 1) {
1360                         wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1361                         return 0;
1362                 }
1363                 ret = hostapd_check_ht_capab(iface);
1364                 if (ret < 0)
1365                         goto fail;
1366                 if (ret == 1) {
1367                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1368                                    "be completed in a callback");
1369                         return 0;
1370                 }
1371
1372                 if (iface->conf->ieee80211h)
1373                         wpa_printf(MSG_DEBUG, "DFS support is enabled");
1374         }
1375         return hostapd_setup_interface_complete(iface, 0);
1376
1377 fail:
1378         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1379         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1380         if (iface->interfaces && iface->interfaces->terminate_on_error)
1381                 eloop_terminate();
1382         return -1;
1383 }
1384
1385
1386 #ifdef CONFIG_FST
1387
1388 static const u8 * fst_hostapd_get_bssid_cb(void *ctx)
1389 {
1390         struct hostapd_data *hapd = ctx;
1391
1392         return hapd->own_addr;
1393 }
1394
1395
1396 static void fst_hostapd_get_channel_info_cb(void *ctx,
1397                                             enum hostapd_hw_mode *hw_mode,
1398                                             u8 *channel)
1399 {
1400         struct hostapd_data *hapd = ctx;
1401
1402         *hw_mode = ieee80211_freq_to_chan(hapd->iface->freq, channel);
1403 }
1404
1405
1406 static void fst_hostapd_set_ies_cb(void *ctx, const struct wpabuf *fst_ies)
1407 {
1408         struct hostapd_data *hapd = ctx;
1409
1410         if (hapd->iface->fst_ies != fst_ies) {
1411                 hapd->iface->fst_ies = fst_ies;
1412                 if (ieee802_11_set_beacon(hapd))
1413                         wpa_printf(MSG_WARNING, "FST: Cannot set beacon");
1414         }
1415 }
1416
1417
1418 static int fst_hostapd_send_action_cb(void *ctx, const u8 *da,
1419                                       struct wpabuf *buf)
1420 {
1421         struct hostapd_data *hapd = ctx;
1422
1423         return hostapd_drv_send_action(hapd, hapd->iface->freq, 0, da,
1424                                        wpabuf_head(buf), wpabuf_len(buf));
1425 }
1426
1427
1428 static const struct wpabuf * fst_hostapd_get_mb_ie_cb(void *ctx, const u8 *addr)
1429 {
1430         struct hostapd_data *hapd = ctx;
1431         struct sta_info *sta = ap_get_sta(hapd, addr);
1432
1433         return sta ? sta->mb_ies : NULL;
1434 }
1435
1436
1437 static void fst_hostapd_update_mb_ie_cb(void *ctx, const u8 *addr,
1438                                         const u8 *buf, size_t size)
1439 {
1440         struct hostapd_data *hapd = ctx;
1441         struct sta_info *sta = ap_get_sta(hapd, addr);
1442
1443         if (sta) {
1444                 struct mb_ies_info info;
1445
1446                 if (!mb_ies_info_by_ies(&info, buf, size)) {
1447                         wpabuf_free(sta->mb_ies);
1448                         sta->mb_ies = mb_ies_by_info(&info);
1449                 }
1450         }
1451 }
1452
1453
1454 static const u8 * fst_hostapd_get_sta(struct fst_get_peer_ctx **get_ctx,
1455                                       Boolean mb_only)
1456 {
1457         struct sta_info *s = (struct sta_info *) *get_ctx;
1458
1459         if (mb_only) {
1460                 for (; s && !s->mb_ies; s = s->next)
1461                         ;
1462         }
1463
1464         if (s) {
1465                 *get_ctx = (struct fst_get_peer_ctx *) s->next;
1466
1467                 return s->addr;
1468         }
1469
1470         *get_ctx = NULL;
1471         return NULL;
1472 }
1473
1474
1475 static const u8 * fst_hostapd_get_peer_first(void *ctx,
1476                                              struct fst_get_peer_ctx **get_ctx,
1477                                              Boolean mb_only)
1478 {
1479         struct hostapd_data *hapd = ctx;
1480
1481         *get_ctx = (struct fst_get_peer_ctx *) hapd->sta_list;
1482
1483         return fst_hostapd_get_sta(get_ctx, mb_only);
1484 }
1485
1486
1487 static const u8 * fst_hostapd_get_peer_next(void *ctx,
1488                                             struct fst_get_peer_ctx **get_ctx,
1489                                             Boolean mb_only)
1490 {
1491         return fst_hostapd_get_sta(get_ctx, mb_only);
1492 }
1493
1494
1495 void fst_hostapd_fill_iface_obj(struct hostapd_data *hapd,
1496                                 struct fst_wpa_obj *iface_obj)
1497 {
1498         iface_obj->ctx = hapd;
1499         iface_obj->get_bssid = fst_hostapd_get_bssid_cb;
1500         iface_obj->get_channel_info = fst_hostapd_get_channel_info_cb;
1501         iface_obj->set_ies = fst_hostapd_set_ies_cb;
1502         iface_obj->send_action = fst_hostapd_send_action_cb;
1503         iface_obj->get_mb_ie = fst_hostapd_get_mb_ie_cb;
1504         iface_obj->update_mb_ie = fst_hostapd_update_mb_ie_cb;
1505         iface_obj->get_peer_first = fst_hostapd_get_peer_first;
1506         iface_obj->get_peer_next = fst_hostapd_get_peer_next;
1507 }
1508
1509 #endif /* CONFIG_FST */
1510
1511
1512 static int hostapd_setup_interface_complete_sync(struct hostapd_iface *iface,
1513                                                  int err)
1514 {
1515         struct hostapd_data *hapd = iface->bss[0];
1516         size_t j;
1517         u8 *prev_addr;
1518         int delay_apply_cfg = 0;
1519         int res_dfs_offload = 0;
1520
1521         if (err)
1522                 goto fail;
1523
1524         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1525         if (iface->conf->channel) {
1526 #ifdef NEED_AP_MLME
1527                 int res;
1528 #endif /* NEED_AP_MLME */
1529
1530                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1531                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1532                            "Frequency: %d MHz",
1533                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1534                            iface->conf->channel, iface->freq);
1535
1536 #ifdef NEED_AP_MLME
1537                 /* Handle DFS only if it is not offloaded to the driver */
1538                 if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
1539                         /* Check DFS */
1540                         res = hostapd_handle_dfs(iface);
1541                         if (res <= 0) {
1542                                 if (res < 0)
1543                                         goto fail;
1544                                 return res;
1545                         }
1546                 } else {
1547                         /* If DFS is offloaded to the driver */
1548                         res_dfs_offload = hostapd_handle_dfs_offload(iface);
1549                         if (res_dfs_offload <= 0) {
1550                                 if (res_dfs_offload < 0)
1551                                         goto fail;
1552                         } else {
1553                                 wpa_printf(MSG_DEBUG,
1554                                            "Proceed with AP/channel setup");
1555                                 /*
1556                                  * If this is a DFS channel, move to completing
1557                                  * AP setup.
1558                                  */
1559                                 if (res_dfs_offload == 1)
1560                                         goto dfs_offload;
1561                                 /* Otherwise fall through. */
1562                         }
1563                 }
1564 #endif /* NEED_AP_MLME */
1565
1566 #ifdef CONFIG_MESH
1567                 if (iface->mconf != NULL) {
1568                         wpa_printf(MSG_DEBUG,
1569                                    "%s: Mesh configuration will be applied while joining the mesh network",
1570                                    iface->bss[0]->conf->iface);
1571                         delay_apply_cfg = 1;
1572                 }
1573 #endif /* CONFIG_MESH */
1574
1575                 if (!delay_apply_cfg &&
1576                     hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1577                                      hapd->iconf->channel,
1578                                      hapd->iconf->ieee80211n,
1579                                      hapd->iconf->ieee80211ac,
1580                                      hapd->iconf->secondary_channel,
1581                                      hapd->iconf->vht_oper_chwidth,
1582                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1583                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1584                         wpa_printf(MSG_ERROR, "Could not set channel for "
1585                                    "kernel driver");
1586                         goto fail;
1587                 }
1588         }
1589
1590         if (iface->current_mode) {
1591                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1592                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1593                                    "table.");
1594                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1595                                        HOSTAPD_LEVEL_WARNING,
1596                                        "Failed to prepare rates table.");
1597                         goto fail;
1598                 }
1599         }
1600
1601         if (hapd->iconf->rts_threshold > -1 &&
1602             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1603                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1604                            "kernel driver");
1605                 goto fail;
1606         }
1607
1608         if (hapd->iconf->fragm_threshold > -1 &&
1609             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1610                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1611                            "for kernel driver");
1612                 goto fail;
1613         }
1614
1615         prev_addr = hapd->own_addr;
1616
1617         for (j = 0; j < iface->num_bss; j++) {
1618                 hapd = iface->bss[j];
1619                 if (j)
1620                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1621                 if (hostapd_setup_bss(hapd, j == 0)) {
1622                         do {
1623                                 hapd = iface->bss[j];
1624                                 hostapd_bss_deinit_no_free(hapd);
1625                                 hostapd_free_hapd_data(hapd);
1626                         } while (j-- > 0);
1627                         goto fail;
1628                 }
1629                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1630                         prev_addr = hapd->own_addr;
1631         }
1632         hapd = iface->bss[0];
1633
1634         hostapd_tx_queue_params(iface);
1635
1636         ap_list_init(iface);
1637         dl_list_init(&iface->sta_seen);
1638
1639         hostapd_set_acl(hapd);
1640
1641         if (hostapd_driver_commit(hapd) < 0) {
1642                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1643                            "configuration", __func__);
1644                 goto fail;
1645         }
1646
1647         /*
1648          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1649          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1650          * mode), the interface is up only after driver_commit, so initialize
1651          * WPS after driver_commit.
1652          */
1653         for (j = 0; j < iface->num_bss; j++) {
1654                 if (hostapd_init_wps_complete(iface->bss[j]))
1655                         goto fail;
1656         }
1657
1658         if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
1659             !res_dfs_offload) {
1660                 /*
1661                  * If freq is DFS, and DFS is offloaded to the driver, then wait
1662                  * for CAC to complete.
1663                  */
1664                 wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
1665                 return res_dfs_offload;
1666         }
1667
1668 #ifdef NEED_AP_MLME
1669 dfs_offload:
1670 #endif /* NEED_AP_MLME */
1671
1672 #ifdef CONFIG_FST
1673         if (hapd->iconf->fst_cfg.group_id[0]) {
1674                 struct fst_wpa_obj iface_obj;
1675
1676                 fst_hostapd_fill_iface_obj(hapd, &iface_obj);
1677                 iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
1678                                         &iface_obj, &hapd->iconf->fst_cfg);
1679                 if (!iface->fst) {
1680                         wpa_printf(MSG_ERROR, "Could not attach to FST %s",
1681                                    hapd->iconf->fst_cfg.group_id);
1682                         goto fail;
1683                 }
1684         }
1685 #endif /* CONFIG_FST */
1686
1687         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1688         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1689         if (hapd->setup_complete_cb)
1690                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1691
1692         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1693                    iface->bss[0]->conf->iface);
1694         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1695                 iface->interfaces->terminate_on_error--;
1696
1697         return 0;
1698
1699 fail:
1700         wpa_printf(MSG_ERROR, "Interface initialization failed");
1701         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1702         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1703 #ifdef CONFIG_FST
1704         if (iface->fst) {
1705                 fst_detach(iface->fst);
1706                 iface->fst = NULL;
1707         }
1708 #endif /* CONFIG_FST */
1709         if (iface->interfaces && iface->interfaces->terminate_on_error)
1710                 eloop_terminate();
1711         return -1;
1712 }
1713
1714
1715 /**
1716  * hostapd_setup_interface_complete - Complete interface setup
1717  *
1718  * This function is called when previous steps in the interface setup has been
1719  * completed. This can also start operations, e.g., DFS, that will require
1720  * additional processing before interface is ready to be enabled. Such
1721  * operations will call this function from eloop callbacks when finished.
1722  */
1723 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1724 {
1725         struct hapd_interfaces *interfaces = iface->interfaces;
1726         struct hostapd_data *hapd = iface->bss[0];
1727         unsigned int i;
1728         int not_ready_in_sync_ifaces = 0;
1729
1730         if (!iface->need_to_start_in_sync)
1731                 return hostapd_setup_interface_complete_sync(iface, err);
1732
1733         if (err) {
1734                 wpa_printf(MSG_ERROR, "Interface initialization failed");
1735                 hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1736                 iface->need_to_start_in_sync = 0;
1737                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1738                 if (interfaces && interfaces->terminate_on_error)
1739                         eloop_terminate();
1740                 return -1;
1741         }
1742
1743         if (iface->ready_to_start_in_sync) {
1744                 /* Already in ready and waiting. should never happpen */
1745                 return 0;
1746         }
1747
1748         for (i = 0; i < interfaces->count; i++) {
1749                 if (interfaces->iface[i]->need_to_start_in_sync &&
1750                     !interfaces->iface[i]->ready_to_start_in_sync)
1751                         not_ready_in_sync_ifaces++;
1752         }
1753
1754         /*
1755          * Check if this is the last interface, if yes then start all the other
1756          * waiting interfaces. If not, add this interface to the waiting list.
1757          */
1758         if (not_ready_in_sync_ifaces > 1 && iface->state == HAPD_IFACE_DFS) {
1759                 /*
1760                  * If this interface went through CAC, do not synchronize, just
1761                  * start immediately.
1762                  */
1763                 iface->need_to_start_in_sync = 0;
1764                 wpa_printf(MSG_INFO,
1765                            "%s: Finished CAC - bypass sync and start interface",
1766                            iface->bss[0]->conf->iface);
1767                 return hostapd_setup_interface_complete_sync(iface, err);
1768         }
1769
1770         if (not_ready_in_sync_ifaces > 1) {
1771                 /* need to wait as there are other interfaces still coming up */
1772                 iface->ready_to_start_in_sync = 1;
1773                 wpa_printf(MSG_INFO,
1774                            "%s: Interface waiting to sync with other interfaces",
1775                            iface->bss[0]->conf->iface);
1776                 return 0;
1777         }
1778
1779         wpa_printf(MSG_INFO,
1780                    "%s: Last interface to sync - starting all interfaces",
1781                    iface->bss[0]->conf->iface);
1782         iface->need_to_start_in_sync = 0;
1783         hostapd_setup_interface_complete_sync(iface, err);
1784         for (i = 0; i < interfaces->count; i++) {
1785                 if (interfaces->iface[i]->need_to_start_in_sync &&
1786                     interfaces->iface[i]->ready_to_start_in_sync) {
1787                         hostapd_setup_interface_complete_sync(
1788                                 interfaces->iface[i], 0);
1789                         /* Only once the interfaces are sync started */
1790                         interfaces->iface[i]->need_to_start_in_sync = 0;
1791                 }
1792         }
1793
1794         return 0;
1795 }
1796
1797
1798 /**
1799  * hostapd_setup_interface - Setup of an interface
1800  * @iface: Pointer to interface data.
1801  * Returns: 0 on success, -1 on failure
1802  *
1803  * Initializes the driver interface, validates the configuration,
1804  * and sets driver parameters based on the configuration.
1805  * Flushes old stations, sets the channel, encryption,
1806  * beacons, and WDS links based on the configuration.
1807  *
1808  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1809  * or DFS operations, this function returns 0 before such operations have been
1810  * completed. The pending operations are registered into eloop and will be
1811  * completed from eloop callbacks. Those callbacks end up calling
1812  * hostapd_setup_interface_complete() once setup has been completed.
1813  */
1814 int hostapd_setup_interface(struct hostapd_iface *iface)
1815 {
1816         int ret;
1817
1818         ret = setup_interface(iface);
1819         if (ret) {
1820                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1821                            iface->bss[0]->conf->iface);
1822                 return -1;
1823         }
1824
1825         return 0;
1826 }
1827
1828
1829 /**
1830  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1831  * @hapd_iface: Pointer to interface data
1832  * @conf: Pointer to per-interface configuration
1833  * @bss: Pointer to per-BSS configuration for this BSS
1834  * Returns: Pointer to allocated BSS data
1835  *
1836  * This function is used to allocate per-BSS data structure. This data will be
1837  * freed after hostapd_cleanup() is called for it during interface
1838  * deinitialization.
1839  */
1840 struct hostapd_data *
1841 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1842                        struct hostapd_config *conf,
1843                        struct hostapd_bss_config *bss)
1844 {
1845         struct hostapd_data *hapd;
1846
1847         hapd = os_zalloc(sizeof(*hapd));
1848         if (hapd == NULL)
1849                 return NULL;
1850
1851         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1852         hapd->iconf = conf;
1853         hapd->conf = bss;
1854         hapd->iface = hapd_iface;
1855         hapd->driver = hapd->iconf->driver;
1856         hapd->ctrl_sock = -1;
1857
1858         return hapd;
1859 }
1860
1861
1862 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1863 {
1864         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1865                    hapd->conf->iface);
1866         hostapd_bss_deinit_no_free(hapd);
1867         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1868         hostapd_cleanup(hapd);
1869 }
1870
1871
1872 void hostapd_interface_deinit(struct hostapd_iface *iface)
1873 {
1874         int j;
1875
1876         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1877         if (iface == NULL)
1878                 return;
1879
1880         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1881
1882 #ifdef CONFIG_IEEE80211N
1883 #ifdef NEED_AP_MLME
1884         hostapd_stop_setup_timers(iface);
1885         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
1886 #endif /* NEED_AP_MLME */
1887 #endif /* CONFIG_IEEE80211N */
1888         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1889         iface->wait_channel_update = 0;
1890
1891 #ifdef CONFIG_FST
1892         if (iface->fst) {
1893                 fst_detach(iface->fst);
1894                 iface->fst = NULL;
1895         }
1896 #endif /* CONFIG_FST */
1897
1898         for (j = iface->num_bss - 1; j >= 0; j--)
1899                 hostapd_bss_deinit(iface->bss[j]);
1900 }
1901
1902
1903 void hostapd_interface_free(struct hostapd_iface *iface)
1904 {
1905         size_t j;
1906         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1907         for (j = 0; j < iface->num_bss; j++) {
1908                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1909                            __func__, iface->bss[j]);
1910                 os_free(iface->bss[j]);
1911         }
1912         hostapd_cleanup_iface(iface);
1913 }
1914
1915
1916 /**
1917  * hostapd_init - Allocate and initialize per-interface data
1918  * @config_file: Path to the configuration file
1919  * Returns: Pointer to the allocated interface data or %NULL on failure
1920  *
1921  * This function is used to allocate main data structures for per-interface
1922  * data. The allocated data buffer will be freed by calling
1923  * hostapd_cleanup_iface().
1924  */
1925 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1926                                     const char *config_file)
1927 {
1928         struct hostapd_iface *hapd_iface = NULL;
1929         struct hostapd_config *conf = NULL;
1930         struct hostapd_data *hapd;
1931         size_t i;
1932
1933         hapd_iface = os_zalloc(sizeof(*hapd_iface));
1934         if (hapd_iface == NULL)
1935                 goto fail;
1936
1937         hapd_iface->config_fname = os_strdup(config_file);
1938         if (hapd_iface->config_fname == NULL)
1939                 goto fail;
1940
1941         conf = interfaces->config_read_cb(hapd_iface->config_fname);
1942         if (conf == NULL)
1943                 goto fail;
1944         hapd_iface->conf = conf;
1945
1946         hapd_iface->num_bss = conf->num_bss;
1947         hapd_iface->bss = os_calloc(conf->num_bss,
1948                                     sizeof(struct hostapd_data *));
1949         if (hapd_iface->bss == NULL)
1950                 goto fail;
1951
1952         for (i = 0; i < conf->num_bss; i++) {
1953                 hapd = hapd_iface->bss[i] =
1954                         hostapd_alloc_bss_data(hapd_iface, conf,
1955                                                conf->bss[i]);
1956                 if (hapd == NULL)
1957                         goto fail;
1958                 hapd->msg_ctx = hapd;
1959         }
1960
1961         return hapd_iface;
1962
1963 fail:
1964         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1965                    config_file);
1966         if (conf)
1967                 hostapd_config_free(conf);
1968         if (hapd_iface) {
1969                 os_free(hapd_iface->config_fname);
1970                 os_free(hapd_iface->bss);
1971                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1972                            __func__, hapd_iface);
1973                 os_free(hapd_iface);
1974         }
1975         return NULL;
1976 }
1977
1978
1979 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1980 {
1981         size_t i, j;
1982
1983         for (i = 0; i < interfaces->count; i++) {
1984                 struct hostapd_iface *iface = interfaces->iface[i];
1985                 for (j = 0; j < iface->num_bss; j++) {
1986                         struct hostapd_data *hapd = iface->bss[j];
1987                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
1988                                 return 1;
1989                 }
1990         }
1991
1992         return 0;
1993 }
1994
1995
1996 /**
1997  * hostapd_interface_init_bss - Read configuration file and init BSS data
1998  *
1999  * This function is used to parse configuration file for a BSS. This BSS is
2000  * added to an existing interface sharing the same radio (if any) or a new
2001  * interface is created if this is the first interface on a radio. This
2002  * allocate memory for the BSS. No actual driver operations are started.
2003  *
2004  * This is similar to hostapd_interface_init(), but for a case where the
2005  * configuration is used to add a single BSS instead of all BSSes for a radio.
2006  */
2007 struct hostapd_iface *
2008 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
2009                            const char *config_fname, int debug)
2010 {
2011         struct hostapd_iface *new_iface = NULL, *iface = NULL;
2012         struct hostapd_data *hapd;
2013         int k;
2014         size_t i, bss_idx;
2015
2016         if (!phy || !*phy)
2017                 return NULL;
2018
2019         for (i = 0; i < interfaces->count; i++) {
2020                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
2021                         iface = interfaces->iface[i];
2022                         break;
2023                 }
2024         }
2025
2026         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
2027                    config_fname, phy, iface ? "" : " --> new PHY");
2028         if (iface) {
2029                 struct hostapd_config *conf;
2030                 struct hostapd_bss_config **tmp_conf;
2031                 struct hostapd_data **tmp_bss;
2032                 struct hostapd_bss_config *bss;
2033                 const char *ifname;
2034
2035                 /* Add new BSS to existing iface */
2036                 conf = interfaces->config_read_cb(config_fname);
2037                 if (conf == NULL)
2038                         return NULL;
2039                 if (conf->num_bss > 1) {
2040                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
2041                         hostapd_config_free(conf);
2042                         return NULL;
2043                 }
2044
2045                 ifname = conf->bss[0]->iface;
2046                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
2047                         wpa_printf(MSG_ERROR,
2048                                    "Interface name %s already in use", ifname);
2049                         hostapd_config_free(conf);
2050                         return NULL;
2051                 }
2052
2053                 tmp_conf = os_realloc_array(
2054                         iface->conf->bss, iface->conf->num_bss + 1,
2055                         sizeof(struct hostapd_bss_config *));
2056                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
2057                                            sizeof(struct hostapd_data *));
2058                 if (tmp_bss)
2059                         iface->bss = tmp_bss;
2060                 if (tmp_conf) {
2061                         iface->conf->bss = tmp_conf;
2062                         iface->conf->last_bss = tmp_conf[0];
2063                 }
2064                 if (tmp_bss == NULL || tmp_conf == NULL) {
2065                         hostapd_config_free(conf);
2066                         return NULL;
2067                 }
2068                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
2069                 iface->conf->num_bss++;
2070
2071                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
2072                 if (hapd == NULL) {
2073                         iface->conf->num_bss--;
2074                         hostapd_config_free(conf);
2075                         return NULL;
2076                 }
2077                 iface->conf->last_bss = bss;
2078                 iface->bss[iface->num_bss] = hapd;
2079                 hapd->msg_ctx = hapd;
2080
2081                 bss_idx = iface->num_bss++;
2082                 conf->num_bss--;
2083                 conf->bss[0] = NULL;
2084                 hostapd_config_free(conf);
2085         } else {
2086                 /* Add a new iface with the first BSS */
2087                 new_iface = iface = hostapd_init(interfaces, config_fname);
2088                 if (!iface)
2089                         return NULL;
2090                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
2091                 iface->interfaces = interfaces;
2092                 bss_idx = 0;
2093         }
2094
2095         for (k = 0; k < debug; k++) {
2096                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
2097                         iface->bss[bss_idx]->conf->logger_stdout_level--;
2098         }
2099
2100         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
2101             !hostapd_drv_none(iface->bss[bss_idx])) {
2102                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
2103                            config_fname);
2104                 if (new_iface)
2105                         hostapd_interface_deinit_free(new_iface);
2106                 return NULL;
2107         }
2108
2109         return iface;
2110 }
2111
2112
2113 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
2114 {
2115         const struct wpa_driver_ops *driver;
2116         void *drv_priv;
2117
2118         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2119         if (iface == NULL)
2120                 return;
2121         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
2122                    __func__, (unsigned int) iface->num_bss,
2123                    (unsigned int) iface->conf->num_bss);
2124         driver = iface->bss[0]->driver;
2125         drv_priv = iface->bss[0]->drv_priv;
2126         hostapd_interface_deinit(iface);
2127         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2128                    __func__, driver, drv_priv);
2129         if (driver && driver->hapd_deinit && drv_priv) {
2130                 driver->hapd_deinit(drv_priv);
2131                 iface->bss[0]->drv_priv = NULL;
2132         }
2133         hostapd_interface_free(iface);
2134 }
2135
2136
2137 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
2138                                   void *drv_priv,
2139                                   struct hostapd_iface *hapd_iface)
2140 {
2141         size_t j;
2142
2143         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2144                    __func__, driver, drv_priv);
2145         if (driver && driver->hapd_deinit && drv_priv) {
2146                 driver->hapd_deinit(drv_priv);
2147                 for (j = 0; j < hapd_iface->num_bss; j++) {
2148                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
2149                                    __func__, (int) j,
2150                                    hapd_iface->bss[j]->drv_priv);
2151                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
2152                                 hapd_iface->bss[j]->drv_priv = NULL;
2153                 }
2154         }
2155 }
2156
2157
2158 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
2159 {
2160         size_t j;
2161
2162         if (hapd_iface->bss[0]->drv_priv != NULL) {
2163                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
2164                            hapd_iface->conf->bss[0]->iface);
2165                 return -1;
2166         }
2167
2168         wpa_printf(MSG_DEBUG, "Enable interface %s",
2169                    hapd_iface->conf->bss[0]->iface);
2170
2171         for (j = 0; j < hapd_iface->num_bss; j++)
2172                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2173         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2174                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
2175                 return -1;
2176         }
2177
2178         if (hapd_iface->interfaces == NULL ||
2179             hapd_iface->interfaces->driver_init == NULL ||
2180             hapd_iface->interfaces->driver_init(hapd_iface))
2181                 return -1;
2182
2183         if (hostapd_setup_interface(hapd_iface)) {
2184                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
2185                                       hapd_iface->bss[0]->drv_priv,
2186                                       hapd_iface);
2187                 return -1;
2188         }
2189
2190         return 0;
2191 }
2192
2193
2194 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
2195 {
2196         size_t j;
2197
2198         wpa_printf(MSG_DEBUG, "Reload interface %s",
2199                    hapd_iface->conf->bss[0]->iface);
2200         for (j = 0; j < hapd_iface->num_bss; j++)
2201                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2202         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2203                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
2204                 return -1;
2205         }
2206         hostapd_clear_old(hapd_iface);
2207         for (j = 0; j < hapd_iface->num_bss; j++)
2208                 hostapd_reload_bss(hapd_iface->bss[j]);
2209
2210         return 0;
2211 }
2212
2213
2214 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
2215 {
2216         size_t j;
2217         const struct wpa_driver_ops *driver;
2218         void *drv_priv;
2219
2220         if (hapd_iface == NULL)
2221                 return -1;
2222
2223         if (hapd_iface->bss[0]->drv_priv == NULL) {
2224                 wpa_printf(MSG_INFO, "Interface %s already disabled",
2225                            hapd_iface->conf->bss[0]->iface);
2226                 return -1;
2227         }
2228
2229         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2230         driver = hapd_iface->bss[0]->driver;
2231         drv_priv = hapd_iface->bss[0]->drv_priv;
2232
2233         hapd_iface->driver_ap_teardown =
2234                 !!(hapd_iface->drv_flags &
2235                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2236
2237         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
2238         for (j = 0; j < hapd_iface->num_bss; j++) {
2239                 struct hostapd_data *hapd = hapd_iface->bss[j];
2240                 hostapd_bss_deinit_no_free(hapd);
2241                 hostapd_free_hapd_data(hapd);
2242         }
2243
2244         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
2245
2246         /* From hostapd_cleanup_iface: These were initialized in
2247          * hostapd_setup_interface and hostapd_setup_interface_complete
2248          */
2249         hostapd_cleanup_iface_partial(hapd_iface);
2250
2251         wpa_printf(MSG_DEBUG, "Interface %s disabled",
2252                    hapd_iface->bss[0]->conf->iface);
2253         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
2254         return 0;
2255 }
2256
2257
2258 static struct hostapd_iface *
2259 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
2260 {
2261         struct hostapd_iface **iface, *hapd_iface;
2262
2263         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
2264                                  sizeof(struct hostapd_iface *));
2265         if (iface == NULL)
2266                 return NULL;
2267         interfaces->iface = iface;
2268         hapd_iface = interfaces->iface[interfaces->count] =
2269                 os_zalloc(sizeof(*hapd_iface));
2270         if (hapd_iface == NULL) {
2271                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2272                            "the interface", __func__);
2273                 return NULL;
2274         }
2275         interfaces->count++;
2276         hapd_iface->interfaces = interfaces;
2277
2278         return hapd_iface;
2279 }
2280
2281
2282 static struct hostapd_config *
2283 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
2284                      const char *ctrl_iface, const char *driver)
2285 {
2286         struct hostapd_bss_config *bss;
2287         struct hostapd_config *conf;
2288
2289         /* Allocates memory for bss and conf */
2290         conf = hostapd_config_defaults();
2291         if (conf == NULL) {
2292                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2293                                 "configuration", __func__);
2294                 return NULL;
2295         }
2296
2297         if (driver) {
2298                 int j;
2299
2300                 for (j = 0; wpa_drivers[j]; j++) {
2301                         if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
2302                                 conf->driver = wpa_drivers[j];
2303                                 goto skip;
2304                         }
2305                 }
2306
2307                 wpa_printf(MSG_ERROR,
2308                            "Invalid/unknown driver '%s' - registering the default driver",
2309                            driver);
2310         }
2311
2312         conf->driver = wpa_drivers[0];
2313         if (conf->driver == NULL) {
2314                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
2315                 hostapd_config_free(conf);
2316                 return NULL;
2317         }
2318
2319 skip:
2320         bss = conf->last_bss = conf->bss[0];
2321
2322         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
2323         bss->ctrl_interface = os_strdup(ctrl_iface);
2324         if (bss->ctrl_interface == NULL) {
2325                 hostapd_config_free(conf);
2326                 return NULL;
2327         }
2328
2329         /* Reading configuration file skipped, will be done in SET!
2330          * From reading the configuration till the end has to be done in
2331          * SET
2332          */
2333         return conf;
2334 }
2335
2336
2337 static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
2338                               struct hostapd_config *conf)
2339 {
2340         size_t i;
2341         struct hostapd_data *hapd;
2342
2343         hapd_iface->bss = os_calloc(conf->num_bss,
2344                                     sizeof(struct hostapd_data *));
2345         if (hapd_iface->bss == NULL)
2346                 return -1;
2347
2348         for (i = 0; i < conf->num_bss; i++) {
2349                 hapd = hapd_iface->bss[i] =
2350                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
2351                 if (hapd == NULL) {
2352                         while (i > 0) {
2353                                 i--;
2354                                 os_free(hapd_iface->bss[i]);
2355                                 hapd_iface->bss[i] = NULL;
2356                         }
2357                         os_free(hapd_iface->bss);
2358                         hapd_iface->bss = NULL;
2359                         return -1;
2360                 }
2361                 hapd->msg_ctx = hapd;
2362         }
2363
2364         hapd_iface->conf = conf;
2365         hapd_iface->num_bss = conf->num_bss;
2366
2367         return 0;
2368 }
2369
2370
2371 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
2372 {
2373         struct hostapd_config *conf = NULL;
2374         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
2375         struct hostapd_data *hapd;
2376         char *ptr;
2377         size_t i, j;
2378         const char *conf_file = NULL, *phy_name = NULL;
2379
2380         if (os_strncmp(buf, "bss_config=", 11) == 0) {
2381                 char *pos;
2382                 phy_name = buf + 11;
2383                 pos = os_strchr(phy_name, ':');
2384                 if (!pos)
2385                         return -1;
2386                 *pos++ = '\0';
2387                 conf_file = pos;
2388                 if (!os_strlen(conf_file))
2389                         return -1;
2390
2391                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
2392                                                         conf_file, 0);
2393                 if (!hapd_iface)
2394                         return -1;
2395                 for (j = 0; j < interfaces->count; j++) {
2396                         if (interfaces->iface[j] == hapd_iface)
2397                                 break;
2398                 }
2399                 if (j == interfaces->count) {
2400                         struct hostapd_iface **tmp;
2401                         tmp = os_realloc_array(interfaces->iface,
2402                                                interfaces->count + 1,
2403                                                sizeof(struct hostapd_iface *));
2404                         if (!tmp) {
2405                                 hostapd_interface_deinit_free(hapd_iface);
2406                                 return -1;
2407                         }
2408                         interfaces->iface = tmp;
2409                         interfaces->iface[interfaces->count++] = hapd_iface;
2410                         new_iface = hapd_iface;
2411                 }
2412
2413                 if (new_iface) {
2414                         if (interfaces->driver_init(hapd_iface))
2415                                 goto fail;
2416
2417                         if (hostapd_setup_interface(hapd_iface)) {
2418                                 hostapd_deinit_driver(
2419                                         hapd_iface->bss[0]->driver,
2420                                         hapd_iface->bss[0]->drv_priv,
2421                                         hapd_iface);
2422                                 goto fail;
2423                         }
2424                 } else {
2425                         /* Assign new BSS with bss[0]'s driver info */
2426                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
2427                         hapd->driver = hapd_iface->bss[0]->driver;
2428                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
2429                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
2430                                   ETH_ALEN);
2431
2432                         if (start_ctrl_iface_bss(hapd) < 0 ||
2433                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
2434                              hostapd_setup_bss(hapd, -1))) {
2435                                 hostapd_cleanup(hapd);
2436                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
2437                                 hapd_iface->conf->num_bss--;
2438                                 hapd_iface->num_bss--;
2439                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
2440                                            __func__, hapd, hapd->conf->iface);
2441                                 hostapd_config_free_bss(hapd->conf);
2442                                 hapd->conf = NULL;
2443                                 os_free(hapd);
2444                                 return -1;
2445                         }
2446                 }
2447                 return 0;
2448         }
2449
2450         ptr = os_strchr(buf, ' ');
2451         if (ptr == NULL)
2452                 return -1;
2453         *ptr++ = '\0';
2454
2455         if (os_strncmp(ptr, "config=", 7) == 0)
2456                 conf_file = ptr + 7;
2457
2458         for (i = 0; i < interfaces->count; i++) {
2459                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
2460                                buf)) {
2461                         wpa_printf(MSG_INFO, "Cannot add interface - it "
2462                                    "already exists");
2463                         return -1;
2464                 }
2465         }
2466
2467         hapd_iface = hostapd_iface_alloc(interfaces);
2468         if (hapd_iface == NULL) {
2469                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2470                            "for interface", __func__);
2471                 goto fail;
2472         }
2473         new_iface = hapd_iface;
2474
2475         if (conf_file && interfaces->config_read_cb) {
2476                 conf = interfaces->config_read_cb(conf_file);
2477                 if (conf && conf->bss)
2478                         os_strlcpy(conf->bss[0]->iface, buf,
2479                                    sizeof(conf->bss[0]->iface));
2480         } else {
2481                 char *driver = os_strchr(ptr, ' ');
2482
2483                 if (driver)
2484                         *driver++ = '\0';
2485                 conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
2486         }
2487
2488         if (conf == NULL || conf->bss == NULL) {
2489                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2490                            "for configuration", __func__);
2491                 goto fail;
2492         }
2493
2494         if (hostapd_data_alloc(hapd_iface, conf) < 0) {
2495                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2496                            "for hostapd", __func__);
2497                 goto fail;
2498         }
2499         conf = NULL;
2500
2501         if (start_ctrl_iface(hapd_iface) < 0)
2502                 goto fail;
2503
2504         wpa_printf(MSG_INFO, "Add interface '%s'",
2505                    hapd_iface->conf->bss[0]->iface);
2506
2507         return 0;
2508
2509 fail:
2510         if (conf)
2511                 hostapd_config_free(conf);
2512         if (hapd_iface) {
2513                 if (hapd_iface->bss) {
2514                         for (i = 0; i < hapd_iface->num_bss; i++) {
2515                                 hapd = hapd_iface->bss[i];
2516                                 if (!hapd)
2517                                         continue;
2518                                 if (hapd_iface->interfaces &&
2519                                     hapd_iface->interfaces->ctrl_iface_deinit)
2520                                         hapd_iface->interfaces->
2521                                                 ctrl_iface_deinit(hapd);
2522                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2523                                            __func__, hapd_iface->bss[i],
2524                                            hapd->conf->iface);
2525                                 hostapd_cleanup(hapd);
2526                                 os_free(hapd);
2527                                 hapd_iface->bss[i] = NULL;
2528                         }
2529                         os_free(hapd_iface->bss);
2530                         hapd_iface->bss = NULL;
2531                 }
2532                 if (new_iface) {
2533                         interfaces->count--;
2534                         interfaces->iface[interfaces->count] = NULL;
2535                 }
2536                 hostapd_cleanup_iface(hapd_iface);
2537         }
2538         return -1;
2539 }
2540
2541
2542 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
2543 {
2544         size_t i;
2545
2546         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
2547
2548         /* Remove hostapd_data only if it has already been initialized */
2549         if (idx < iface->num_bss) {
2550                 struct hostapd_data *hapd = iface->bss[idx];
2551
2552                 hostapd_bss_deinit(hapd);
2553                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2554                            __func__, hapd, hapd->conf->iface);
2555                 hostapd_config_free_bss(hapd->conf);
2556                 hapd->conf = NULL;
2557                 os_free(hapd);
2558
2559                 iface->num_bss--;
2560
2561                 for (i = idx; i < iface->num_bss; i++)
2562                         iface->bss[i] = iface->bss[i + 1];
2563         } else {
2564                 hostapd_config_free_bss(iface->conf->bss[idx]);
2565                 iface->conf->bss[idx] = NULL;
2566         }
2567
2568         iface->conf->num_bss--;
2569         for (i = idx; i < iface->conf->num_bss; i++)
2570                 iface->conf->bss[i] = iface->conf->bss[i + 1];
2571
2572         return 0;
2573 }
2574
2575
2576 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2577 {
2578         struct hostapd_iface *hapd_iface;
2579         size_t i, j, k = 0;
2580
2581         for (i = 0; i < interfaces->count; i++) {
2582                 hapd_iface = interfaces->iface[i];
2583                 if (hapd_iface == NULL)
2584                         return -1;
2585                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2586                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2587                         hapd_iface->driver_ap_teardown =
2588                                 !!(hapd_iface->drv_flags &
2589                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2590
2591                         hostapd_interface_deinit_free(hapd_iface);
2592                         k = i;
2593                         while (k < (interfaces->count - 1)) {
2594                                 interfaces->iface[k] =
2595                                         interfaces->iface[k + 1];
2596                                 k++;
2597                         }
2598                         interfaces->count--;
2599                         return 0;
2600                 }
2601
2602                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2603                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2604                                 hapd_iface->driver_ap_teardown =
2605                                         !(hapd_iface->drv_flags &
2606                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2607                                 return hostapd_remove_bss(hapd_iface, j);
2608                         }
2609                 }
2610         }
2611         return -1;
2612 }
2613
2614
2615 /**
2616  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2617  * @hapd: Pointer to BSS data
2618  * @sta: Pointer to the associated STA data
2619  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2620  *
2621  * This function will be called whenever a station associates with the AP. It
2622  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2623  * from drv_callbacks.c based on driver events for drivers that take care of
2624  * management frames (IEEE 802.11 authentication and association) internally.
2625  */
2626 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2627                            int reassoc)
2628 {
2629         if (hapd->tkip_countermeasures) {
2630                 hostapd_drv_sta_deauth(hapd, sta->addr,
2631                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2632                 return;
2633         }
2634
2635         hostapd_prune_associations(hapd, sta->addr);
2636         ap_sta_clear_disconnect_timeouts(hapd, sta);
2637
2638         /* IEEE 802.11F (IAPP) */
2639         if (hapd->conf->ieee802_11f)
2640                 iapp_new_station(hapd->iapp, sta);
2641
2642 #ifdef CONFIG_P2P
2643         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2644                 sta->no_p2p_set = 1;
2645                 hapd->num_sta_no_p2p++;
2646                 if (hapd->num_sta_no_p2p == 1)
2647                         hostapd_p2p_non_p2p_sta_connected(hapd);
2648         }
2649 #endif /* CONFIG_P2P */
2650
2651         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2652          * IEEE 802.1X/WPA code will start accounting after the station has
2653          * been authorized. */
2654         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2655                 ap_sta_set_authorized(hapd, sta, 1);
2656                 os_get_reltime(&sta->connected_time);
2657                 accounting_sta_start(hapd, sta);
2658         }
2659
2660         /* Start IEEE 802.1X authentication process for new stations */
2661         ieee802_1x_new_station(hapd, sta);
2662         if (reassoc) {
2663                 if (sta->auth_alg != WLAN_AUTH_FT &&
2664                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2665                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2666         } else
2667                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2668
2669         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2670                 wpa_printf(MSG_DEBUG,
2671                            "%s: %s: reschedule ap_handle_timer timeout for "
2672                            MACSTR " (%d seconds - ap_max_inactivity)",
2673                            hapd->conf->iface, __func__, MAC2STR(sta->addr),
2674                            hapd->conf->ap_max_inactivity);
2675                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2676                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2677                                        ap_handle_timer, hapd, sta);
2678         }
2679 }
2680
2681
2682 const char * hostapd_state_text(enum hostapd_iface_state s)
2683 {
2684         switch (s) {
2685         case HAPD_IFACE_UNINITIALIZED:
2686                 return "UNINITIALIZED";
2687         case HAPD_IFACE_DISABLED:
2688                 return "DISABLED";
2689         case HAPD_IFACE_COUNTRY_UPDATE:
2690                 return "COUNTRY_UPDATE";
2691         case HAPD_IFACE_ACS:
2692                 return "ACS";
2693         case HAPD_IFACE_HT_SCAN:
2694                 return "HT_SCAN";
2695         case HAPD_IFACE_DFS:
2696                 return "DFS";
2697         case HAPD_IFACE_ENABLED:
2698                 return "ENABLED";
2699         }
2700
2701         return "UNKNOWN";
2702 }
2703
2704
2705 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2706 {
2707         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2708                    iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2709                    hostapd_state_text(s));
2710         iface->state = s;
2711 }
2712
2713
2714 int hostapd_csa_in_progress(struct hostapd_iface *iface)
2715 {
2716         unsigned int i;
2717
2718         for (i = 0; i < iface->num_bss; i++)
2719                 if (iface->bss[i]->csa_in_progress)
2720                         return 1;
2721         return 0;
2722 }
2723
2724
2725 #ifdef NEED_AP_MLME
2726
2727 static void free_beacon_data(struct beacon_data *beacon)
2728 {
2729         os_free(beacon->head);
2730         beacon->head = NULL;
2731         os_free(beacon->tail);
2732         beacon->tail = NULL;
2733         os_free(beacon->probe_resp);
2734         beacon->probe_resp = NULL;
2735         os_free(beacon->beacon_ies);
2736         beacon->beacon_ies = NULL;
2737         os_free(beacon->proberesp_ies);
2738         beacon->proberesp_ies = NULL;
2739         os_free(beacon->assocresp_ies);
2740         beacon->assocresp_ies = NULL;
2741 }
2742
2743
2744 static int hostapd_build_beacon_data(struct hostapd_data *hapd,
2745                                      struct beacon_data *beacon)
2746 {
2747         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2748         struct wpa_driver_ap_params params;
2749         int ret;
2750
2751         os_memset(beacon, 0, sizeof(*beacon));
2752         ret = ieee802_11_build_ap_params(hapd, &params);
2753         if (ret < 0)
2754                 return ret;
2755
2756         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2757                                          &proberesp_extra,
2758                                          &assocresp_extra);
2759         if (ret)
2760                 goto free_ap_params;
2761
2762         ret = -1;
2763         beacon->head = os_malloc(params.head_len);
2764         if (!beacon->head)
2765                 goto free_ap_extra_ies;
2766
2767         os_memcpy(beacon->head, params.head, params.head_len);
2768         beacon->head_len = params.head_len;
2769
2770         beacon->tail = os_malloc(params.tail_len);
2771         if (!beacon->tail)
2772                 goto free_beacon;
2773
2774         os_memcpy(beacon->tail, params.tail, params.tail_len);
2775         beacon->tail_len = params.tail_len;
2776
2777         if (params.proberesp != NULL) {
2778                 beacon->probe_resp = os_malloc(params.proberesp_len);
2779                 if (!beacon->probe_resp)
2780                         goto free_beacon;
2781
2782                 os_memcpy(beacon->probe_resp, params.proberesp,
2783                           params.proberesp_len);
2784                 beacon->probe_resp_len = params.proberesp_len;
2785         }
2786
2787         /* copy the extra ies */
2788         if (beacon_extra) {
2789                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2790                 if (!beacon->beacon_ies)
2791                         goto free_beacon;
2792
2793                 os_memcpy(beacon->beacon_ies,
2794                           beacon_extra->buf, wpabuf_len(beacon_extra));
2795                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2796         }
2797
2798         if (proberesp_extra) {
2799                 beacon->proberesp_ies =
2800                         os_malloc(wpabuf_len(proberesp_extra));
2801                 if (!beacon->proberesp_ies)
2802                         goto free_beacon;
2803
2804                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2805                           wpabuf_len(proberesp_extra));
2806                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2807         }
2808
2809         if (assocresp_extra) {
2810                 beacon->assocresp_ies =
2811                         os_malloc(wpabuf_len(assocresp_extra));
2812                 if (!beacon->assocresp_ies)
2813                         goto free_beacon;
2814
2815                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2816                           wpabuf_len(assocresp_extra));
2817                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2818         }
2819
2820         ret = 0;
2821 free_beacon:
2822         /* if the function fails, the caller should not free beacon data */
2823         if (ret)
2824                 free_beacon_data(beacon);
2825
2826 free_ap_extra_ies:
2827         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2828                                   assocresp_extra);
2829 free_ap_params:
2830         ieee802_11_free_ap_params(&params);
2831         return ret;
2832 }
2833
2834
2835 /*
2836  * TODO: This flow currently supports only changing channel and width within
2837  * the same hw_mode. Any other changes to MAC parameters or provided settings
2838  * are not supported.
2839  */
2840 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2841                                       struct hostapd_config *conf,
2842                                       struct hostapd_freq_params *params,
2843                                       struct hostapd_freq_params *old_params)
2844 {
2845         int channel;
2846
2847         if (!params->channel) {
2848                 /* check if the new channel is supported by hw */
2849                 params->channel = hostapd_hw_get_channel(hapd, params->freq);
2850         }
2851
2852         channel = params->channel;
2853         if (!channel)
2854                 return -1;
2855
2856         /* if a pointer to old_params is provided we save previous state */
2857         if (old_params &&
2858             hostapd_set_freq_params(old_params, conf->hw_mode,
2859                                     hostapd_hw_get_freq(hapd, conf->channel),
2860                                     conf->channel, conf->ieee80211n,
2861                                     conf->ieee80211ac,
2862                                     conf->secondary_channel,
2863                                     conf->vht_oper_chwidth,
2864                                     conf->vht_oper_centr_freq_seg0_idx,
2865                                     conf->vht_oper_centr_freq_seg1_idx,
2866                                     conf->vht_capab))
2867                 return -1;
2868
2869         switch (params->bandwidth) {
2870         case 0:
2871         case 20:
2872         case 40:
2873                 conf->vht_oper_chwidth = VHT_CHANWIDTH_USE_HT;
2874                 break;
2875         case 80:
2876                 if (params->center_freq2)
2877                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80P80MHZ;
2878                 else
2879                         conf->vht_oper_chwidth = VHT_CHANWIDTH_80MHZ;
2880                 break;
2881         case 160:
2882                 conf->vht_oper_chwidth = VHT_CHANWIDTH_160MHZ;
2883                 break;
2884         default:
2885                 return -1;
2886         }
2887
2888         conf->channel = channel;
2889         conf->ieee80211n = params->ht_enabled;
2890         conf->secondary_channel = params->sec_channel_offset;
2891         ieee80211_freq_to_chan(params->center_freq1,
2892                                &conf->vht_oper_centr_freq_seg0_idx);
2893         ieee80211_freq_to_chan(params->center_freq2,
2894                                &conf->vht_oper_centr_freq_seg1_idx);
2895
2896         /* TODO: maybe call here hostapd_config_check here? */
2897
2898         return 0;
2899 }
2900
2901
2902 static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
2903                                      struct csa_settings *settings)
2904 {
2905         struct hostapd_iface *iface = hapd->iface;
2906         struct hostapd_freq_params old_freq;
2907         int ret;
2908         u8 chan, vht_bandwidth;
2909
2910         os_memset(&old_freq, 0, sizeof(old_freq));
2911         if (!iface || !iface->freq || hapd->csa_in_progress)
2912                 return -1;
2913
2914         switch (settings->freq_params.bandwidth) {
2915         case 80:
2916                 if (settings->freq_params.center_freq2)
2917                         vht_bandwidth = VHT_CHANWIDTH_80P80MHZ;
2918                 else
2919                         vht_bandwidth = VHT_CHANWIDTH_80MHZ;
2920                 break;
2921         case 160:
2922                 vht_bandwidth = VHT_CHANWIDTH_160MHZ;
2923                 break;
2924         default:
2925                 vht_bandwidth = VHT_CHANWIDTH_USE_HT;
2926                 break;
2927         }
2928
2929         if (ieee80211_freq_to_channel_ext(
2930                     settings->freq_params.freq,
2931                     settings->freq_params.sec_channel_offset,
2932                     vht_bandwidth,
2933                     &hapd->iface->cs_oper_class,
2934                     &chan) == NUM_HOSTAPD_MODES) {
2935                 wpa_printf(MSG_DEBUG,
2936                            "invalid frequency for channel switch (freq=%d, sec_channel_offset=%d, vht_enabled=%d)",
2937                            settings->freq_params.freq,
2938                            settings->freq_params.sec_channel_offset,
2939                            settings->freq_params.vht_enabled);
2940                 return -1;
2941         }
2942
2943         settings->freq_params.channel = chan;
2944
2945         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2946                                          &settings->freq_params,
2947                                          &old_freq);
2948         if (ret)
2949                 return ret;
2950
2951         ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
2952
2953         /* change back the configuration */
2954         hostapd_change_config_freq(iface->bss[0], iface->conf,
2955                                    &old_freq, NULL);
2956
2957         if (ret)
2958                 return ret;
2959
2960         /* set channel switch parameters for csa ie */
2961         hapd->cs_freq_params = settings->freq_params;
2962         hapd->cs_count = settings->cs_count;
2963         hapd->cs_block_tx = settings->block_tx;
2964
2965         ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
2966         if (ret) {
2967                 free_beacon_data(&settings->beacon_after);
2968                 return ret;
2969         }
2970
2971         settings->counter_offset_beacon[0] = hapd->cs_c_off_beacon;
2972         settings->counter_offset_presp[0] = hapd->cs_c_off_proberesp;
2973         settings->counter_offset_beacon[1] = hapd->cs_c_off_ecsa_beacon;
2974         settings->counter_offset_presp[1] = hapd->cs_c_off_ecsa_proberesp;
2975
2976         return 0;
2977 }
2978
2979
2980 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2981 {
2982         os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
2983         hapd->cs_count = 0;
2984         hapd->cs_block_tx = 0;
2985         hapd->cs_c_off_beacon = 0;
2986         hapd->cs_c_off_proberesp = 0;
2987         hapd->csa_in_progress = 0;
2988         hapd->cs_c_off_ecsa_beacon = 0;
2989         hapd->cs_c_off_ecsa_proberesp = 0;
2990 }
2991
2992
2993 int hostapd_switch_channel(struct hostapd_data *hapd,
2994                            struct csa_settings *settings)
2995 {
2996         int ret;
2997
2998         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
2999                 wpa_printf(MSG_INFO, "CSA is not supported");
3000                 return -1;
3001         }
3002
3003         ret = hostapd_fill_csa_settings(hapd, settings);
3004         if (ret)
3005                 return ret;
3006
3007         ret = hostapd_drv_switch_channel(hapd, settings);
3008         free_beacon_data(&settings->beacon_csa);
3009         free_beacon_data(&settings->beacon_after);
3010
3011         if (ret) {
3012                 /* if we failed, clean cs parameters */
3013                 hostapd_cleanup_cs_params(hapd);
3014                 return ret;
3015         }
3016
3017         hapd->csa_in_progress = 1;
3018         return 0;
3019 }
3020
3021
3022 void
3023 hostapd_switch_channel_fallback(struct hostapd_iface *iface,
3024                                 const struct hostapd_freq_params *freq_params)
3025 {
3026         int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
3027         unsigned int i;
3028
3029         wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
3030
3031         if (freq_params->center_freq1)
3032                 vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
3033         if (freq_params->center_freq2)
3034                 vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
3035
3036         switch (freq_params->bandwidth) {
3037         case 0:
3038         case 20:
3039         case 40:
3040                 vht_bw = VHT_CHANWIDTH_USE_HT;
3041                 break;
3042         case 80:
3043                 if (freq_params->center_freq2)
3044                         vht_bw = VHT_CHANWIDTH_80P80MHZ;
3045                 else
3046                         vht_bw = VHT_CHANWIDTH_80MHZ;
3047                 break;
3048         case 160:
3049                 vht_bw = VHT_CHANWIDTH_160MHZ;
3050                 break;
3051         default:
3052                 wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
3053                            freq_params->bandwidth);
3054                 break;
3055         }
3056
3057         iface->freq = freq_params->freq;
3058         iface->conf->channel = freq_params->channel;
3059         iface->conf->secondary_channel = freq_params->sec_channel_offset;
3060         iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
3061         iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
3062         iface->conf->vht_oper_chwidth = vht_bw;
3063         iface->conf->ieee80211n = freq_params->ht_enabled;
3064         iface->conf->ieee80211ac = freq_params->vht_enabled;
3065
3066         /*
3067          * cs_params must not be cleared earlier because the freq_params
3068          * argument may actually point to one of these.
3069          */
3070         for (i = 0; i < iface->num_bss; i++)
3071                 hostapd_cleanup_cs_params(iface->bss[i]);
3072
3073         hostapd_disable_iface(iface);
3074         hostapd_enable_iface(iface);
3075 }
3076
3077
3078 struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
3079                                         const char *ifname)
3080 {
3081         size_t i, j;
3082
3083         for (i = 0; i < interfaces->count; i++) {
3084                 struct hostapd_iface *iface = interfaces->iface[i];
3085
3086                 for (j = 0; j < iface->num_bss; j++) {
3087                         struct hostapd_data *hapd = iface->bss[j];
3088
3089                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
3090                                 return hapd;
3091                 }
3092         }
3093
3094         return NULL;
3095 }
3096
3097 #endif /* NEED_AP_MLME */
3098
3099
3100 void hostapd_periodic_iface(struct hostapd_iface *iface)
3101 {
3102         size_t i;
3103
3104         ap_list_timer(iface);
3105
3106         for (i = 0; i < iface->num_bss; i++) {
3107                 struct hostapd_data *hapd = iface->bss[i];
3108
3109                 if (!hapd->started)
3110                         continue;
3111
3112 #ifndef CONFIG_NO_RADIUS
3113                 hostapd_acl_expire(hapd);
3114 #endif /* CONFIG_NO_RADIUS */
3115         }
3116 }