libeap/src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "radius/radius_client.h"
  16 #include "radius/radius_das.h"
  17 #include "eap_server/tncs.h"
  18 #include "eapol_auth/eapol_auth_sm.h"
  19 #include "eapol_auth/eapol_auth_sm_i.h"
  20 #include "fst/fst.h"
  21 #include "hostapd.h"
  22 #include "authsrv.h"
  23 #include "sta_info.h"
  24 #include "accounting.h"
  25 #include "ap_list.h"
  26 #include "beacon.h"
  27 #include "iapp.h"
  28 #include "ieee802_1x.h"
  29 #include "ieee802_11_auth.h"
  30 #include "vlan_init.h"
  31 #include "wpa_auth.h"
  32 #include "wps_hostapd.h"
  33 #include "hw_features.h"
  34 #include "wpa_auth_glue.h"
  35 #include "ap_drv_ops.h"
  36 #include "ap_config.h"
  37 #include "p2p_hostapd.h"
  38 #include "gas_serv.h"
  39 #include "dfs.h"
  40 #include "ieee802_11.h"
  41 #include "bss_load.h"
  42 #include "x_snoop.h"
  43 #include "dhcp_snoop.h"
  44 #include "ndisc_snoop.h"
  45
  46
  47 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  48 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  49 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  50 static int setup_interface2(struct hostapd_iface *iface);
  51 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
  52
  53
  54 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  55                                int (*cb)(struct hostapd_iface *iface,
  56                                          void *ctx), void *ctx)
  57 {
  58         size_t i;
  59         int ret;
  60
  61         for (i = 0; i < interfaces->count; i++) {
  62                 ret = cb(interfaces->iface[i], ctx);
  63                 if (ret)
  64                         return ret;
  65         }
  66
  67         return 0;
  68 }
  69
  70
  71 static void hostapd_reload_bss(struct hostapd_data *hapd)
  72 {
  73         struct hostapd_ssid *ssid;
  74
  75 #ifndef CONFIG_NO_RADIUS
  76         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  77 #endif /* CONFIG_NO_RADIUS */
  78
  79         ssid = &hapd->conf->ssid;
  80         if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  81             ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  82                 /*
  83                  * Force PSK to be derived again since SSID or passphrase may
  84                  * have changed.
  85                  */
  86                 hostapd_config_clear_wpa_psk(&hapd->conf->ssid.wpa_psk);
  87         }
  88         if (hostapd_setup_wpa_psk(hapd->conf)) {
  89                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  90                            "after reloading configuration");
  91         }
  92
  93         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  94                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  95         else
  96                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  97
  98         if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
  99                 hostapd_setup_wpa(hapd);
 100                 if (hapd->wpa_auth)
 101                         wpa_init_keys(hapd->wpa_auth);
 102         } else if (hapd->conf->wpa) {
 103                 const u8 *wpa_ie;
 104                 size_t wpa_ie_len;
 105                 hostapd_reconfig_wpa(hapd);
 106                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
 107                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
 108                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 109                                    "the kernel driver.");
 110         } else if (hapd->wpa_auth) {
 111                 wpa_deinit(hapd->wpa_auth);
 112                 hapd->wpa_auth = NULL;
 113                 hostapd_set_privacy(hapd, 0);
 114                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 115                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 116         }
 117
 118         ieee802_11_set_beacon(hapd);
 119         hostapd_update_wps(hapd);
 120
 121         if (hapd->conf->ssid.ssid_set &&
 122             hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
 123                              hapd->conf->ssid.ssid_len)) {
 124                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 125                 /* try to continue */
 126         }
 127         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 128 }
 129
 130
 131 static void hostapd_clear_old(struct hostapd_iface *iface)
 132 {
 133         size_t j;
 134
 135         /*
 136          * Deauthenticate all stations since the new configuration may not
 137          * allow them to use the BSS anymore.
 138          */
 139         for (j = 0; j < iface->num_bss; j++) {
 140                 hostapd_flush_old_stations(iface->bss[j],
 141                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 142                 hostapd_broadcast_wep_clear(iface->bss[j]);
 143
 144 #ifndef CONFIG_NO_RADIUS
 145                 /* TODO: update dynamic data based on changed configuration
 146                  * items (e.g., open/close sockets, etc.) */
 147                 radius_client_flush(iface->bss[j]->radius, 0);
 148 #endif /* CONFIG_NO_RADIUS */
 149         }
 150 }
 151
 152
 153 int hostapd_reload_config(struct hostapd_iface *iface)
 154 {
 155         struct hostapd_data *hapd = iface->bss[0];
 156         struct hostapd_config *newconf, *oldconf;
 157         size_t j;
 158
 159         if (iface->config_fname == NULL) {
 160                 /* Only in-memory config in use - assume it has been updated */
 161                 hostapd_clear_old(iface);
 162                 for (j = 0; j < iface->num_bss; j++)
 163                         hostapd_reload_bss(iface->bss[j]);
 164                 return 0;
 165         }
 166
 167         if (iface->interfaces == NULL ||
 168             iface->interfaces->config_read_cb == NULL)
 169                 return -1;
 170         newconf = iface->interfaces->config_read_cb(iface->config_fname);
 171         if (newconf == NULL)
 172                 return -1;
 173
 174         hostapd_clear_old(iface);
 175
 176         oldconf = hapd->iconf;
 177         iface->conf = newconf;
 178
 179         for (j = 0; j < iface->num_bss; j++) {
 180                 hapd = iface->bss[j];
 181                 hapd->iconf = newconf;
 182                 hapd->iconf->channel = oldconf->channel;
 183                 hapd->iconf->acs = oldconf->acs;
 184                 hapd->iconf->secondary_channel = oldconf->secondary_channel;
 185                 hapd->iconf->ieee80211n = oldconf->ieee80211n;
 186                 hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
 187                 hapd->iconf->ht_capab = oldconf->ht_capab;
 188                 hapd->iconf->vht_capab = oldconf->vht_capab;
 189                 hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
 190                 hapd->iconf->vht_oper_centr_freq_seg0_idx =
 191                         oldconf->vht_oper_centr_freq_seg0_idx;
 192                 hapd->iconf->vht_oper_centr_freq_seg1_idx =
 193                         oldconf->vht_oper_centr_freq_seg1_idx;
 194                 hapd->conf = newconf->bss[j];
 195                 hostapd_reload_bss(hapd);
 196         }
 197
 198         hostapd_config_free(oldconf);
 199
 200
 201         return 0;
 202 }
 203
 204
 205 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 206                                               char *ifname)
 207 {
 208         int i;
 209
 210         for (i = 0; i < NUM_WEP_KEYS; i++) {
 211                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 212                                         0, NULL, 0, NULL, 0)) {
 213                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 214                                    "encryption keys (ifname=%s keyidx=%d)",
 215                                    ifname, i);
 216                 }
 217         }
 218 #ifdef CONFIG_IEEE80211W
 219         if (hapd->conf->ieee80211w) {
 220                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 221                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 222                                                 NULL, i, 0, NULL,
 223                                                 0, NULL, 0)) {
 224                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 225                                            "default mgmt encryption keys "
 226                                            "(ifname=%s keyidx=%d)", ifname, i);
 227                         }
 228                 }
 229         }
 230 #endif /* CONFIG_IEEE80211W */
 231 }
 232
 233
 234 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 235 {
 236         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 237         return 0;
 238 }
 239
 240
 241 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 242 {
 243         int errors = 0, idx;
 244         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 245
 246         idx = ssid->wep.idx;
 247         if (ssid->wep.default_len &&
 248             hostapd_drv_set_key(hapd->conf->iface,
 249                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 250                                 1, NULL, 0, ssid->wep.key[idx],
 251                                 ssid->wep.len[idx])) {
 252                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 253                 errors++;
 254         }
 255
 256         return errors;
 257 }
 258
 259
 260 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 261 {
 262         os_free(hapd->probereq_cb);
 263         hapd->probereq_cb = NULL;
 264         hapd->num_probereq_cb = 0;
 265
 266 #ifdef CONFIG_P2P
 267         wpabuf_free(hapd->p2p_beacon_ie);
 268         hapd->p2p_beacon_ie = NULL;
 269         wpabuf_free(hapd->p2p_probe_resp_ie);
 270         hapd->p2p_probe_resp_ie = NULL;
 271 #endif /* CONFIG_P2P */
 272
 273         if (!hapd->started) {
 274                 wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
 275                            __func__, hapd->conf->iface);
 276                 return;
 277         }
 278         hapd->started = 0;
 279
 280         wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
 281         iapp_deinit(hapd->iapp);
 282         hapd->iapp = NULL;
 283         accounting_deinit(hapd);
 284         hostapd_deinit_wpa(hapd);
 285         vlan_deinit(hapd);
 286         hostapd_acl_deinit(hapd);
 287 #ifndef CONFIG_NO_RADIUS
 288         radius_client_deinit(hapd->radius);
 289         hapd->radius = NULL;
 290         radius_das_deinit(hapd->radius_das);
 291         hapd->radius_das = NULL;
 292 #endif /* CONFIG_NO_RADIUS */
 293
 294         hostapd_deinit_wps(hapd);
 295
 296         authsrv_deinit(hapd);
 297
 298         if (hapd->interface_added) {
 299                 hapd->interface_added = 0;
 300                 if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 301                         wpa_printf(MSG_WARNING,
 302                                    "Failed to remove BSS interface %s",
 303                                    hapd->conf->iface);
 304                         hapd->interface_added = 1;
 305                 } else {
 306                         /*
 307                          * Since this was a dynamically added interface, the
 308                          * driver wrapper may have removed its internal instance
 309                          * and hapd->drv_priv is not valid anymore.
 310                          */
 311                         hapd->drv_priv = NULL;
 312                 }
 313         }
 314
 315         wpabuf_free(hapd->time_adv);
 316
 317 #ifdef CONFIG_INTERWORKING
 318         gas_serv_deinit(hapd);
 319 #endif /* CONFIG_INTERWORKING */
 320
 321         bss_load_update_deinit(hapd);
 322         ndisc_snoop_deinit(hapd);
 323         dhcp_snoop_deinit(hapd);
 324         x_snoop_deinit(hapd);
 325
 326 #ifdef CONFIG_SQLITE
 327         bin_clear_free(hapd->tmp_eap_user.identity,
 328                        hapd->tmp_eap_user.identity_len);
 329         bin_clear_free(hapd->tmp_eap_user.password,
 330                        hapd->tmp_eap_user.password_len);
 331 #endif /* CONFIG_SQLITE */
 332
 333 #ifdef CONFIG_MESH
 334         wpabuf_free(hapd->mesh_pending_auth);
 335         hapd->mesh_pending_auth = NULL;
 336 #endif /* CONFIG_MESH */
 337 }
 338
 339
 340 /**
 341  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 342  * @hapd: Pointer to BSS data
 343  *
 344  * This function is used to free all per-BSS data structures and resources.
 345  * Most of the modules that are initialized in hostapd_setup_bss() are
 346  * deinitialized here.
 347  */
 348 static void hostapd_cleanup(struct hostapd_data *hapd)
 349 {
 350         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
 351                    hapd->conf->iface);
 352         if (hapd->iface->interfaces &&
 353             hapd->iface->interfaces->ctrl_iface_deinit)
 354                 hapd->iface->interfaces->ctrl_iface_deinit(hapd);
 355         hostapd_free_hapd_data(hapd);
 356 }
 357
 358
 359 static void sta_track_deinit(struct hostapd_iface *iface)
 360 {
 361         struct hostapd_sta_info *info;
 362
 363         if (!iface->num_sta_seen)
 364                 return;
 365
 366         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 367                                      list))) {
 368                 dl_list_del(&info->list);
 369                 iface->num_sta_seen--;
 370                 os_free(info);
 371         }
 372 }
 373
 374
 375 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 376 {
 377         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 378 #ifdef CONFIG_IEEE80211N
 379 #ifdef NEED_AP_MLME
 380         hostapd_stop_setup_timers(iface);
 381 #endif /* NEED_AP_MLME */
 382 #endif /* CONFIG_IEEE80211N */
 383         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 384         iface->hw_features = NULL;
 385         os_free(iface->current_rates);
 386         iface->current_rates = NULL;
 387         os_free(iface->basic_rates);
 388         iface->basic_rates = NULL;
 389         ap_list_deinit(iface);
 390         sta_track_deinit(iface);
 391 }
 392
 393
 394 /**
 395  * hostapd_cleanup_iface - Complete per-interface cleanup
 396  * @iface: Pointer to interface data
 397  *
 398  * This function is called after per-BSS data structures are deinitialized
 399  * with hostapd_cleanup().
 400  */
 401 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 402 {
 403         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 404         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
 405
 406         hostapd_cleanup_iface_partial(iface);
 407         hostapd_config_free(iface->conf);
 408         iface->conf = NULL;
 409
 410         os_free(iface->config_fname);
 411         os_free(iface->bss);
 412         wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
 413         os_free(iface);
 414 }
 415
 416
 417 static void hostapd_clear_wep(struct hostapd_data *hapd)
 418 {
 419         if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
 420                 hostapd_set_privacy(hapd, 0);
 421                 hostapd_broadcast_wep_clear(hapd);
 422         }
 423 }
 424
 425
 426 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 427 {
 428         int i;
 429
 430         hostapd_broadcast_wep_set(hapd);
 431
 432         if (hapd->conf->ssid.wep.default_len) {
 433                 hostapd_set_privacy(hapd, 1);
 434                 return 0;
 435         }
 436
 437         /*
 438          * When IEEE 802.1X is not enabled, the driver may need to know how to
 439          * set authentication algorithms for static WEP.
 440          */
 441         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 442
 443         for (i = 0; i < 4; i++) {
 444                 if (hapd->conf->ssid.wep.key[i] &&
 445                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 446                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 447                                         hapd->conf->ssid.wep.key[i],
 448                                         hapd->conf->ssid.wep.len[i])) {
 449                         wpa_printf(MSG_WARNING, "Could not set WEP "
 450                                    "encryption.");
 451                         return -1;
 452                 }
 453                 if (hapd->conf->ssid.wep.key[i] &&
 454                     i == hapd->conf->ssid.wep.idx)
 455                         hostapd_set_privacy(hapd, 1);
 456         }
 457
 458         return 0;
 459 }
 460
 461
 462 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 463 {
 464         int ret = 0;
 465         u8 addr[ETH_ALEN];
 466
 467         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 468                 return 0;
 469
 470         if (!hapd->iface->driver_ap_teardown) {
 471                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 472                         "Flushing old station entries");
 473
 474                 if (hostapd_flush(hapd)) {
 475                         wpa_msg(hapd->msg_ctx, MSG_WARNING,
 476                                 "Could not connect to kernel driver");
 477                         ret = -1;
 478                 }
 479         }
 480         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 481         os_memset(addr, 0xff, ETH_ALEN);
 482         hostapd_drv_sta_deauth(hapd, addr, reason);
 483         hostapd_free_stas(hapd);
 484
 485         return ret;
 486 }
 487
 488
 489 static void hostapd_bss_deinit_no_free(struct hostapd_data *hapd)
 490 {
 491         hostapd_free_stas(hapd);
 492         hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
 493         hostapd_clear_wep(hapd);
 494 }
 495
 496
 497 /**
 498  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 499  * @iface: Pointer to interface data
 500  * Returns: 0 on success, -1 on failure
 501  *
 502  * This function is used to validate that the configured BSSIDs are valid.
 503  */
 504 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 505 {
 506         u8 mask[ETH_ALEN] = { 0 };
 507         struct hostapd_data *hapd = iface->bss[0];
 508         unsigned int i = iface->conf->num_bss, bits = 0, j;
 509         int auto_addr = 0;
 510
 511         if (hostapd_drv_none(hapd))
 512                 return 0;
 513
 514         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 515
 516         /* Determine the bits necessary to cover the number of BSSIDs. */
 517         for (i--; i; i >>= 1)
 518                 bits++;
 519
 520         /* Determine the bits necessary to any configured BSSIDs,
 521            if they are higher than the number of BSSIDs. */
 522         for (j = 0; j < iface->conf->num_bss; j++) {
 523                 if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
 524                         if (j)
 525                                 auto_addr++;
 526                         continue;
 527                 }
 528
 529                 for (i = 0; i < ETH_ALEN; i++) {
 530                         mask[i] |=
 531                                 iface->conf->bss[j]->bssid[i] ^
 532                                 hapd->own_addr[i];
 533                 }
 534         }
 535
 536         if (!auto_addr)
 537                 goto skip_mask_ext;
 538
 539         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 540                 ;
 541         j = 0;
 542         if (i < ETH_ALEN) {
 543                 j = (5 - i) * 8;
 544
 545                 while (mask[i] != 0) {
 546                         mask[i] >>= 1;
 547                         j++;
 548                 }
 549         }
 550
 551         if (bits < j)
 552                 bits = j;
 553
 554         if (bits > 40) {
 555                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 556                            bits);
 557                 return -1;
 558         }
 559
 560         os_memset(mask, 0xff, ETH_ALEN);
 561         j = bits / 8;
 562         for (i = 5; i > 5 - j; i--)
 563                 mask[i] = 0;
 564         j = bits % 8;
 565         while (j--)
 566                 mask[i] <<= 1;
 567
 568 skip_mask_ext:
 569         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 570                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 571
 572         if (!auto_addr)
 573                 return 0;
 574
 575         for (i = 0; i < ETH_ALEN; i++) {
 576                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 577                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 578                                    " for start address " MACSTR ".",
 579                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 580                         wpa_printf(MSG_ERROR, "Start address must be the "
 581                                    "first address in the block (i.e., addr "
 582                                    "AND mask == addr).");
 583                         return -1;
 584                 }
 585         }
 586
 587         return 0;
 588 }
 589
 590
 591 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 592 {
 593         size_t i;
 594
 595         for (i = 0; i < conf->num_bss; i++) {
 596                 if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
 597                         return 1;
 598                 }
 599         }
 600
 601         return 0;
 602 }
 603
 604
 605 #ifndef CONFIG_NO_RADIUS
 606
 607 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 608                                     struct radius_das_attrs *attr)
 609 {
 610         if (attr->nas_identifier &&
 611             (!hapd->conf->nas_identifier ||
 612              os_strlen(hapd->conf->nas_identifier) !=
 613              attr->nas_identifier_len ||
 614              os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
 615                        attr->nas_identifier_len) != 0)) {
 616                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
 617                 return 1;
 618         }
 619
 620         if (attr->nas_ip_addr &&
 621             (hapd->conf->own_ip_addr.af != AF_INET ||
 622              os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
 623              0)) {
 624                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
 625                 return 1;
 626         }
 627
 628 #ifdef CONFIG_IPV6
 629         if (attr->nas_ipv6_addr &&
 630             (hapd->conf->own_ip_addr.af != AF_INET6 ||
 631              os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
 632              != 0)) {
 633                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
 634                 return 1;
 635         }
 636 #endif /* CONFIG_IPV6 */
 637
 638         return 0;
 639 }
 640
 641
 642 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 643                                               struct radius_das_attrs *attr,
 644                                               int *multi)
 645 {
 646         struct sta_info *selected, *sta;
 647         char buf[128];
 648         int num_attr = 0;
 649         int count;
 650
 651         *multi = 0;
 652
 653         for (sta = hapd->sta_list; sta; sta = sta->next)
 654                 sta->radius_das_match = 1;
 655
 656         if (attr->sta_addr) {
 657                 num_attr++;
 658                 sta = ap_get_sta(hapd, attr->sta_addr);
 659                 if (!sta) {
 660                         wpa_printf(MSG_DEBUG,
 661                                    "RADIUS DAS: No Calling-Station-Id match");
 662                         return NULL;
 663                 }
 664
 665                 selected = sta;
 666                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 667                         if (sta != selected)
 668                                 sta->radius_das_match = 0;
 669                 }
 670                 wpa_printf(MSG_DEBUG, "RADIUS DAS: Calling-Station-Id match");
 671         }
 672
 673         if (attr->acct_session_id) {
 674                 num_attr++;
 675                 if (attr->acct_session_id_len != 17) {
 676                         wpa_printf(MSG_DEBUG,
 677                                    "RADIUS DAS: Acct-Session-Id cannot match");
 678                         return NULL;
 679                 }
 680                 count = 0;
 681
 682                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 683                         if (!sta->radius_das_match)
 684                                 continue;
 685                         os_snprintf(buf, sizeof(buf), "%08X-%08X",
 686                                     sta->acct_session_id_hi,
 687                                     sta->acct_session_id_lo);
 688                         if (os_memcmp(attr->acct_session_id, buf, 17) != 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 != 17) {
 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_hi) {
 716                                 sta->radius_das_match = 0;
 717                                 continue;
 718                         }
 719                         os_snprintf(buf, sizeof(buf), "%08X+%08X",
 720                                     sta->eapol_sm->acct_multi_session_id_hi,
 721                                     sta->eapol_sm->acct_multi_session_id_lo);
 722                         if (os_memcmp(attr->acct_multi_session_id, buf, 17) !=
 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 /**
1513  * hostapd_setup_interface_complete - Complete interface setup
1514  *
1515  * This function is called when previous steps in the interface setup has been
1516  * completed. This can also start operations, e.g., DFS, that will require
1517  * additional processing before interface is ready to be enabled. Such
1518  * operations will call this function from eloop callbacks when finished.
1519  */
1520 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1521 {
1522         struct hostapd_data *hapd = iface->bss[0];
1523         size_t j;
1524         u8 *prev_addr;
1525         int delay_apply_cfg = 0;
1526         int res_dfs_offload = 0;
1527
1528         if (err)
1529                 goto fail;
1530
1531         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1532         if (iface->conf->channel) {
1533 #ifdef NEED_AP_MLME
1534                 int res;
1535 #endif /* NEED_AP_MLME */
1536
1537                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1538                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1539                            "Frequency: %d MHz",
1540                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1541                            iface->conf->channel, iface->freq);
1542
1543 #ifdef NEED_AP_MLME
1544                 /* Handle DFS only if it is not offloaded to the driver */
1545                 if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
1546                         /* Check DFS */
1547                         res = hostapd_handle_dfs(iface);
1548                         if (res <= 0) {
1549                                 if (res < 0)
1550                                         goto fail;
1551                                 return res;
1552                         }
1553                 } else {
1554                         /* If DFS is offloaded to the driver */
1555                         res_dfs_offload = hostapd_handle_dfs_offload(iface);
1556                         if (res_dfs_offload <= 0) {
1557                                 if (res_dfs_offload < 0)
1558                                         goto fail;
1559                         } else {
1560                                 wpa_printf(MSG_DEBUG,
1561                                            "Proceed with AP/channel setup");
1562                                 /*
1563                                  * If this is a DFS channel, move to completing
1564                                  * AP setup.
1565                                  */
1566                                 if (res_dfs_offload == 1)
1567                                         goto dfs_offload;
1568                                 /* Otherwise fall through. */
1569                         }
1570                 }
1571 #endif /* NEED_AP_MLME */
1572
1573 #ifdef CONFIG_MESH
1574                 if (iface->mconf != NULL) {
1575                         wpa_printf(MSG_DEBUG,
1576                                    "%s: Mesh configuration will be applied while joining the mesh network",
1577                                    iface->bss[0]->conf->iface);
1578                         delay_apply_cfg = 1;
1579                 }
1580 #endif /* CONFIG_MESH */
1581
1582                 if (!delay_apply_cfg &&
1583                     hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1584                                      hapd->iconf->channel,
1585                                      hapd->iconf->ieee80211n,
1586                                      hapd->iconf->ieee80211ac,
1587                                      hapd->iconf->secondary_channel,
1588                                      hapd->iconf->vht_oper_chwidth,
1589                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1590                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1591                         wpa_printf(MSG_ERROR, "Could not set channel for "
1592                                    "kernel driver");
1593                         goto fail;
1594                 }
1595         }
1596
1597         if (iface->current_mode) {
1598                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1599                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1600                                    "table.");
1601                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1602                                        HOSTAPD_LEVEL_WARNING,
1603                                        "Failed to prepare rates table.");
1604                         goto fail;
1605                 }
1606         }
1607
1608         if (hapd->iconf->rts_threshold > -1 &&
1609             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1610                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1611                            "kernel driver");
1612                 goto fail;
1613         }
1614
1615         if (hapd->iconf->fragm_threshold > -1 &&
1616             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1617                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1618                            "for kernel driver");
1619                 goto fail;
1620         }
1621
1622         prev_addr = hapd->own_addr;
1623
1624         for (j = 0; j < iface->num_bss; j++) {
1625                 hapd = iface->bss[j];
1626                 if (j)
1627                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1628                 if (hostapd_setup_bss(hapd, j == 0)) {
1629                         do {
1630                                 hapd = iface->bss[j];
1631                                 hostapd_bss_deinit_no_free(hapd);
1632                                 hostapd_free_hapd_data(hapd);
1633                         } while (j-- > 0);
1634                         goto fail;
1635                 }
1636                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1637                         prev_addr = hapd->own_addr;
1638         }
1639         hapd = iface->bss[0];
1640
1641         hostapd_tx_queue_params(iface);
1642
1643         ap_list_init(iface);
1644         dl_list_init(&iface->sta_seen);
1645
1646         hostapd_set_acl(hapd);
1647
1648         if (hostapd_driver_commit(hapd) < 0) {
1649                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1650                            "configuration", __func__);
1651                 goto fail;
1652         }
1653
1654         /*
1655          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1656          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1657          * mode), the interface is up only after driver_commit, so initialize
1658          * WPS after driver_commit.
1659          */
1660         for (j = 0; j < iface->num_bss; j++) {
1661                 if (hostapd_init_wps_complete(iface->bss[j]))
1662                         goto fail;
1663         }
1664
1665         if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
1666             !res_dfs_offload) {
1667                 /*
1668                  * If freq is DFS, and DFS is offloaded to the driver, then wait
1669                  * for CAC to complete.
1670                  */
1671                 wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
1672                 return res_dfs_offload;
1673         }
1674
1675 #ifdef NEED_AP_MLME
1676 dfs_offload:
1677 #endif /* NEED_AP_MLME */
1678
1679 #ifdef CONFIG_FST
1680         if (hapd->iconf->fst_cfg.group_id[0]) {
1681                 struct fst_wpa_obj iface_obj;
1682
1683                 fst_hostapd_fill_iface_obj(hapd, &iface_obj);
1684                 iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
1685                                         &iface_obj, &hapd->iconf->fst_cfg);
1686                 if (!iface->fst) {
1687                         wpa_printf(MSG_ERROR, "Could not attach to FST %s",
1688                                    hapd->iconf->fst_cfg.group_id);
1689                         goto fail;
1690                 }
1691         }
1692 #endif /* CONFIG_FST */
1693
1694         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1695         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1696         if (hapd->setup_complete_cb)
1697                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1698
1699         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1700                    iface->bss[0]->conf->iface);
1701         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1702                 iface->interfaces->terminate_on_error--;
1703
1704         return 0;
1705
1706 fail:
1707         wpa_printf(MSG_ERROR, "Interface initialization failed");
1708         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1709         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1710 #ifdef CONFIG_FST
1711         if (iface->fst) {
1712                 fst_detach(iface->fst);
1713                 iface->fst = NULL;
1714         }
1715 #endif /* CONFIG_FST */
1716         if (iface->interfaces && iface->interfaces->terminate_on_error)
1717                 eloop_terminate();
1718         return -1;
1719 }
1720
1721
1722 /**
1723  * hostapd_setup_interface - Setup of an interface
1724  * @iface: Pointer to interface data.
1725  * Returns: 0 on success, -1 on failure
1726  *
1727  * Initializes the driver interface, validates the configuration,
1728  * and sets driver parameters based on the configuration.
1729  * Flushes old stations, sets the channel, encryption,
1730  * beacons, and WDS links based on the configuration.
1731  *
1732  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1733  * or DFS operations, this function returns 0 before such operations have been
1734  * completed. The pending operations are registered into eloop and will be
1735  * completed from eloop callbacks. Those callbacks end up calling
1736  * hostapd_setup_interface_complete() once setup has been completed.
1737  */
1738 int hostapd_setup_interface(struct hostapd_iface *iface)
1739 {
1740         int ret;
1741
1742         ret = setup_interface(iface);
1743         if (ret) {
1744                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1745                            iface->bss[0]->conf->iface);
1746                 return -1;
1747         }
1748
1749         return 0;
1750 }
1751
1752
1753 /**
1754  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1755  * @hapd_iface: Pointer to interface data
1756  * @conf: Pointer to per-interface configuration
1757  * @bss: Pointer to per-BSS configuration for this BSS
1758  * Returns: Pointer to allocated BSS data
1759  *
1760  * This function is used to allocate per-BSS data structure. This data will be
1761  * freed after hostapd_cleanup() is called for it during interface
1762  * deinitialization.
1763  */
1764 struct hostapd_data *
1765 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1766                        struct hostapd_config *conf,
1767                        struct hostapd_bss_config *bss)
1768 {
1769         struct hostapd_data *hapd;
1770
1771         hapd = os_zalloc(sizeof(*hapd));
1772         if (hapd == NULL)
1773                 return NULL;
1774
1775         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1776         hapd->iconf = conf;
1777         hapd->conf = bss;
1778         hapd->iface = hapd_iface;
1779         hapd->driver = hapd->iconf->driver;
1780         hapd->ctrl_sock = -1;
1781
1782         return hapd;
1783 }
1784
1785
1786 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1787 {
1788         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1789                    hapd->conf->iface);
1790         hostapd_bss_deinit_no_free(hapd);
1791         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1792         hostapd_cleanup(hapd);
1793 }
1794
1795
1796 void hostapd_interface_deinit(struct hostapd_iface *iface)
1797 {
1798         int j;
1799
1800         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1801         if (iface == NULL)
1802                 return;
1803
1804         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1805
1806 #ifdef CONFIG_IEEE80211N
1807 #ifdef NEED_AP_MLME
1808         hostapd_stop_setup_timers(iface);
1809         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
1810 #endif /* NEED_AP_MLME */
1811 #endif /* CONFIG_IEEE80211N */
1812         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1813         iface->wait_channel_update = 0;
1814
1815 #ifdef CONFIG_FST
1816         if (iface->fst) {
1817                 fst_detach(iface->fst);
1818                 iface->fst = NULL;
1819         }
1820 #endif /* CONFIG_FST */
1821
1822         for (j = iface->num_bss - 1; j >= 0; j--)
1823                 hostapd_bss_deinit(iface->bss[j]);
1824 }
1825
1826
1827 void hostapd_interface_free(struct hostapd_iface *iface)
1828 {
1829         size_t j;
1830         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1831         for (j = 0; j < iface->num_bss; j++) {
1832                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1833                            __func__, iface->bss[j]);
1834                 os_free(iface->bss[j]);
1835         }
1836         hostapd_cleanup_iface(iface);
1837 }
1838
1839
1840 /**
1841  * hostapd_init - Allocate and initialize per-interface data
1842  * @config_file: Path to the configuration file
1843  * Returns: Pointer to the allocated interface data or %NULL on failure
1844  *
1845  * This function is used to allocate main data structures for per-interface
1846  * data. The allocated data buffer will be freed by calling
1847  * hostapd_cleanup_iface().
1848  */
1849 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1850                                     const char *config_file)
1851 {
1852         struct hostapd_iface *hapd_iface = NULL;
1853         struct hostapd_config *conf = NULL;
1854         struct hostapd_data *hapd;
1855         size_t i;
1856
1857         hapd_iface = os_zalloc(sizeof(*hapd_iface));
1858         if (hapd_iface == NULL)
1859                 goto fail;
1860
1861         hapd_iface->config_fname = os_strdup(config_file);
1862         if (hapd_iface->config_fname == NULL)
1863                 goto fail;
1864
1865         conf = interfaces->config_read_cb(hapd_iface->config_fname);
1866         if (conf == NULL)
1867                 goto fail;
1868         hapd_iface->conf = conf;
1869
1870         hapd_iface->num_bss = conf->num_bss;
1871         hapd_iface->bss = os_calloc(conf->num_bss,
1872                                     sizeof(struct hostapd_data *));
1873         if (hapd_iface->bss == NULL)
1874                 goto fail;
1875
1876         for (i = 0; i < conf->num_bss; i++) {
1877                 hapd = hapd_iface->bss[i] =
1878                         hostapd_alloc_bss_data(hapd_iface, conf,
1879                                                conf->bss[i]);
1880                 if (hapd == NULL)
1881                         goto fail;
1882                 hapd->msg_ctx = hapd;
1883         }
1884
1885         return hapd_iface;
1886
1887 fail:
1888         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1889                    config_file);
1890         if (conf)
1891                 hostapd_config_free(conf);
1892         if (hapd_iface) {
1893                 os_free(hapd_iface->config_fname);
1894                 os_free(hapd_iface->bss);
1895                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1896                            __func__, hapd_iface);
1897                 os_free(hapd_iface);
1898         }
1899         return NULL;
1900 }
1901
1902
1903 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1904 {
1905         size_t i, j;
1906
1907         for (i = 0; i < interfaces->count; i++) {
1908                 struct hostapd_iface *iface = interfaces->iface[i];
1909                 for (j = 0; j < iface->num_bss; j++) {
1910                         struct hostapd_data *hapd = iface->bss[j];
1911                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
1912                                 return 1;
1913                 }
1914         }
1915
1916         return 0;
1917 }
1918
1919
1920 /**
1921  * hostapd_interface_init_bss - Read configuration file and init BSS data
1922  *
1923  * This function is used to parse configuration file for a BSS. This BSS is
1924  * added to an existing interface sharing the same radio (if any) or a new
1925  * interface is created if this is the first interface on a radio. This
1926  * allocate memory for the BSS. No actual driver operations are started.
1927  *
1928  * This is similar to hostapd_interface_init(), but for a case where the
1929  * configuration is used to add a single BSS instead of all BSSes for a radio.
1930  */
1931 struct hostapd_iface *
1932 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
1933                            const char *config_fname, int debug)
1934 {
1935         struct hostapd_iface *new_iface = NULL, *iface = NULL;
1936         struct hostapd_data *hapd;
1937         int k;
1938         size_t i, bss_idx;
1939
1940         if (!phy || !*phy)
1941                 return NULL;
1942
1943         for (i = 0; i < interfaces->count; i++) {
1944                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
1945                         iface = interfaces->iface[i];
1946                         break;
1947                 }
1948         }
1949
1950         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
1951                    config_fname, phy, iface ? "" : " --> new PHY");
1952         if (iface) {
1953                 struct hostapd_config *conf;
1954                 struct hostapd_bss_config **tmp_conf;
1955                 struct hostapd_data **tmp_bss;
1956                 struct hostapd_bss_config *bss;
1957                 const char *ifname;
1958
1959                 /* Add new BSS to existing iface */
1960                 conf = interfaces->config_read_cb(config_fname);
1961                 if (conf == NULL)
1962                         return NULL;
1963                 if (conf->num_bss > 1) {
1964                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
1965                         hostapd_config_free(conf);
1966                         return NULL;
1967                 }
1968
1969                 ifname = conf->bss[0]->iface;
1970                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
1971                         wpa_printf(MSG_ERROR,
1972                                    "Interface name %s already in use", ifname);
1973                         hostapd_config_free(conf);
1974                         return NULL;
1975                 }
1976
1977                 tmp_conf = os_realloc_array(
1978                         iface->conf->bss, iface->conf->num_bss + 1,
1979                         sizeof(struct hostapd_bss_config *));
1980                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
1981                                            sizeof(struct hostapd_data *));
1982                 if (tmp_bss)
1983                         iface->bss = tmp_bss;
1984                 if (tmp_conf) {
1985                         iface->conf->bss = tmp_conf;
1986                         iface->conf->last_bss = tmp_conf[0];
1987                 }
1988                 if (tmp_bss == NULL || tmp_conf == NULL) {
1989                         hostapd_config_free(conf);
1990                         return NULL;
1991                 }
1992                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
1993                 iface->conf->num_bss++;
1994
1995                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
1996                 if (hapd == NULL) {
1997                         iface->conf->num_bss--;
1998                         hostapd_config_free(conf);
1999                         return NULL;
2000                 }
2001                 iface->conf->last_bss = bss;
2002                 iface->bss[iface->num_bss] = hapd;
2003                 hapd->msg_ctx = hapd;
2004
2005                 bss_idx = iface->num_bss++;
2006                 conf->num_bss--;
2007                 conf->bss[0] = NULL;
2008                 hostapd_config_free(conf);
2009         } else {
2010                 /* Add a new iface with the first BSS */
2011                 new_iface = iface = hostapd_init(interfaces, config_fname);
2012                 if (!iface)
2013                         return NULL;
2014                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
2015                 iface->interfaces = interfaces;
2016                 bss_idx = 0;
2017         }
2018
2019         for (k = 0; k < debug; k++) {
2020                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
2021                         iface->bss[bss_idx]->conf->logger_stdout_level--;
2022         }
2023
2024         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
2025             !hostapd_drv_none(iface->bss[bss_idx])) {
2026                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
2027                            config_fname);
2028                 if (new_iface)
2029                         hostapd_interface_deinit_free(new_iface);
2030                 return NULL;
2031         }
2032
2033         return iface;
2034 }
2035
2036
2037 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
2038 {
2039         const struct wpa_driver_ops *driver;
2040         void *drv_priv;
2041
2042         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2043         if (iface == NULL)
2044                 return;
2045         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
2046                    __func__, (unsigned int) iface->num_bss,
2047                    (unsigned int) iface->conf->num_bss);
2048         driver = iface->bss[0]->driver;
2049         drv_priv = iface->bss[0]->drv_priv;
2050         hostapd_interface_deinit(iface);
2051         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2052                    __func__, driver, drv_priv);
2053         if (driver && driver->hapd_deinit && drv_priv) {
2054                 driver->hapd_deinit(drv_priv);
2055                 iface->bss[0]->drv_priv = NULL;
2056         }
2057         hostapd_interface_free(iface);
2058 }
2059
2060
2061 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
2062                                   void *drv_priv,
2063                                   struct hostapd_iface *hapd_iface)
2064 {
2065         size_t j;
2066
2067         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2068                    __func__, driver, drv_priv);
2069         if (driver && driver->hapd_deinit && drv_priv) {
2070                 driver->hapd_deinit(drv_priv);
2071                 for (j = 0; j < hapd_iface->num_bss; j++) {
2072                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
2073                                    __func__, (int) j,
2074                                    hapd_iface->bss[j]->drv_priv);
2075                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
2076                                 hapd_iface->bss[j]->drv_priv = NULL;
2077                 }
2078         }
2079 }
2080
2081
2082 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
2083 {
2084         size_t j;
2085
2086         if (hapd_iface->bss[0]->drv_priv != NULL) {
2087                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
2088                            hapd_iface->conf->bss[0]->iface);
2089                 return -1;
2090         }
2091
2092         wpa_printf(MSG_DEBUG, "Enable interface %s",
2093                    hapd_iface->conf->bss[0]->iface);
2094
2095         for (j = 0; j < hapd_iface->num_bss; j++)
2096                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2097         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2098                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
2099                 return -1;
2100         }
2101
2102         if (hapd_iface->interfaces == NULL ||
2103             hapd_iface->interfaces->driver_init == NULL ||
2104             hapd_iface->interfaces->driver_init(hapd_iface))
2105                 return -1;
2106
2107         if (hostapd_setup_interface(hapd_iface)) {
2108                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
2109                                       hapd_iface->bss[0]->drv_priv,
2110                                       hapd_iface);
2111                 return -1;
2112         }
2113
2114         return 0;
2115 }
2116
2117
2118 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
2119 {
2120         size_t j;
2121
2122         wpa_printf(MSG_DEBUG, "Reload interface %s",
2123                    hapd_iface->conf->bss[0]->iface);
2124         for (j = 0; j < hapd_iface->num_bss; j++)
2125                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2126         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2127                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
2128                 return -1;
2129         }
2130         hostapd_clear_old(hapd_iface);
2131         for (j = 0; j < hapd_iface->num_bss; j++)
2132                 hostapd_reload_bss(hapd_iface->bss[j]);
2133
2134         return 0;
2135 }
2136
2137
2138 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
2139 {
2140         size_t j;
2141         const struct wpa_driver_ops *driver;
2142         void *drv_priv;
2143
2144         if (hapd_iface == NULL)
2145                 return -1;
2146
2147         if (hapd_iface->bss[0]->drv_priv == NULL) {
2148                 wpa_printf(MSG_INFO, "Interface %s already disabled",
2149                            hapd_iface->conf->bss[0]->iface);
2150                 return -1;
2151         }
2152
2153         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2154         driver = hapd_iface->bss[0]->driver;
2155         drv_priv = hapd_iface->bss[0]->drv_priv;
2156
2157         hapd_iface->driver_ap_teardown =
2158                 !!(hapd_iface->drv_flags &
2159                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2160
2161         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
2162         for (j = 0; j < hapd_iface->num_bss; j++) {
2163                 struct hostapd_data *hapd = hapd_iface->bss[j];
2164                 hostapd_bss_deinit_no_free(hapd);
2165                 hostapd_free_hapd_data(hapd);
2166         }
2167
2168         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
2169
2170         /* From hostapd_cleanup_iface: These were initialized in
2171          * hostapd_setup_interface and hostapd_setup_interface_complete
2172          */
2173         hostapd_cleanup_iface_partial(hapd_iface);
2174
2175         wpa_printf(MSG_DEBUG, "Interface %s disabled",
2176                    hapd_iface->bss[0]->conf->iface);
2177         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
2178         return 0;
2179 }
2180
2181
2182 static struct hostapd_iface *
2183 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
2184 {
2185         struct hostapd_iface **iface, *hapd_iface;
2186
2187         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
2188                                  sizeof(struct hostapd_iface *));
2189         if (iface == NULL)
2190                 return NULL;
2191         interfaces->iface = iface;
2192         hapd_iface = interfaces->iface[interfaces->count] =
2193                 os_zalloc(sizeof(*hapd_iface));
2194         if (hapd_iface == NULL) {
2195                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2196                            "the interface", __func__);
2197                 return NULL;
2198         }
2199         interfaces->count++;
2200         hapd_iface->interfaces = interfaces;
2201
2202         return hapd_iface;
2203 }
2204
2205
2206 static struct hostapd_config *
2207 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
2208                      const char *ctrl_iface, const char *driver)
2209 {
2210         struct hostapd_bss_config *bss;
2211         struct hostapd_config *conf;
2212
2213         /* Allocates memory for bss and conf */
2214         conf = hostapd_config_defaults();
2215         if (conf == NULL) {
2216                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2217                                 "configuration", __func__);
2218                 return NULL;
2219         }
2220
2221         if (driver) {
2222                 int j;
2223
2224                 for (j = 0; wpa_drivers[j]; j++) {
2225                         if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
2226                                 conf->driver = wpa_drivers[j];
2227                                 goto skip;
2228                         }
2229                 }
2230
2231                 wpa_printf(MSG_ERROR,
2232                            "Invalid/unknown driver '%s' - registering the default driver",
2233                            driver);
2234         }
2235
2236         conf->driver = wpa_drivers[0];
2237         if (conf->driver == NULL) {
2238                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
2239                 hostapd_config_free(conf);
2240                 return NULL;
2241         }
2242
2243 skip:
2244         bss = conf->last_bss = conf->bss[0];
2245
2246         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
2247         bss->ctrl_interface = os_strdup(ctrl_iface);
2248         if (bss->ctrl_interface == NULL) {
2249                 hostapd_config_free(conf);
2250                 return NULL;
2251         }
2252
2253         /* Reading configuration file skipped, will be done in SET!
2254          * From reading the configuration till the end has to be done in
2255          * SET
2256          */
2257         return conf;
2258 }
2259
2260
2261 static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
2262                               struct hostapd_config *conf)
2263 {
2264         size_t i;
2265         struct hostapd_data *hapd;
2266
2267         hapd_iface->bss = os_calloc(conf->num_bss,
2268                                     sizeof(struct hostapd_data *));
2269         if (hapd_iface->bss == NULL)
2270                 return -1;
2271
2272         for (i = 0; i < conf->num_bss; i++) {
2273                 hapd = hapd_iface->bss[i] =
2274                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
2275                 if (hapd == NULL) {
2276                         while (i > 0) {
2277                                 i--;
2278                                 os_free(hapd_iface->bss[i]);
2279                                 hapd_iface->bss[i] = NULL;
2280                         }
2281                         os_free(hapd_iface->bss);
2282                         hapd_iface->bss = NULL;
2283                         return -1;
2284                 }
2285                 hapd->msg_ctx = hapd;
2286         }
2287
2288         hapd_iface->conf = conf;
2289         hapd_iface->num_bss = conf->num_bss;
2290
2291         return 0;
2292 }
2293
2294
2295 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
2296 {
2297         struct hostapd_config *conf = NULL;
2298         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
2299         struct hostapd_data *hapd;
2300         char *ptr;
2301         size_t i, j;
2302         const char *conf_file = NULL, *phy_name = NULL;
2303
2304         if (os_strncmp(buf, "bss_config=", 11) == 0) {
2305                 char *pos;
2306                 phy_name = buf + 11;
2307                 pos = os_strchr(phy_name, ':');
2308                 if (!pos)
2309                         return -1;
2310                 *pos++ = '\0';
2311                 conf_file = pos;
2312                 if (!os_strlen(conf_file))
2313                         return -1;
2314
2315                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
2316                                                         conf_file, 0);
2317                 if (!hapd_iface)
2318                         return -1;
2319                 for (j = 0; j < interfaces->count; j++) {
2320                         if (interfaces->iface[j] == hapd_iface)
2321                                 break;
2322                 }
2323                 if (j == interfaces->count) {
2324                         struct hostapd_iface **tmp;
2325                         tmp = os_realloc_array(interfaces->iface,
2326                                                interfaces->count + 1,
2327                                                sizeof(struct hostapd_iface *));
2328                         if (!tmp) {
2329                                 hostapd_interface_deinit_free(hapd_iface);
2330                                 return -1;
2331                         }
2332                         interfaces->iface = tmp;
2333                         interfaces->iface[interfaces->count++] = hapd_iface;
2334                         new_iface = hapd_iface;
2335                 }
2336
2337                 if (new_iface) {
2338                         if (interfaces->driver_init(hapd_iface))
2339                                 goto fail;
2340
2341                         if (hostapd_setup_interface(hapd_iface)) {
2342                                 hostapd_deinit_driver(
2343                                         hapd_iface->bss[0]->driver,
2344                                         hapd_iface->bss[0]->drv_priv,
2345                                         hapd_iface);
2346                                 goto fail;
2347                         }
2348                 } else {
2349                         /* Assign new BSS with bss[0]'s driver info */
2350                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
2351                         hapd->driver = hapd_iface->bss[0]->driver;
2352                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
2353                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
2354                                   ETH_ALEN);
2355
2356                         if (start_ctrl_iface_bss(hapd) < 0 ||
2357                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
2358                              hostapd_setup_bss(hapd, -1))) {
2359                                 hostapd_cleanup(hapd);
2360                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
2361                                 hapd_iface->conf->num_bss--;
2362                                 hapd_iface->num_bss--;
2363                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
2364                                            __func__, hapd, hapd->conf->iface);
2365                                 hostapd_config_free_bss(hapd->conf);
2366                                 hapd->conf = NULL;
2367                                 os_free(hapd);
2368                                 return -1;
2369                         }
2370                 }
2371                 return 0;
2372         }
2373
2374         ptr = os_strchr(buf, ' ');
2375         if (ptr == NULL)
2376                 return -1;
2377         *ptr++ = '\0';
2378
2379         if (os_strncmp(ptr, "config=", 7) == 0)
2380                 conf_file = ptr + 7;
2381
2382         for (i = 0; i < interfaces->count; i++) {
2383                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
2384                                buf)) {
2385                         wpa_printf(MSG_INFO, "Cannot add interface - it "
2386                                    "already exists");
2387                         return -1;
2388                 }
2389         }
2390
2391         hapd_iface = hostapd_iface_alloc(interfaces);
2392         if (hapd_iface == NULL) {
2393                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2394                            "for interface", __func__);
2395                 goto fail;
2396         }
2397         new_iface = hapd_iface;
2398
2399         if (conf_file && interfaces->config_read_cb) {
2400                 conf = interfaces->config_read_cb(conf_file);
2401                 if (conf && conf->bss)
2402                         os_strlcpy(conf->bss[0]->iface, buf,
2403                                    sizeof(conf->bss[0]->iface));
2404         } else {
2405                 char *driver = os_strchr(ptr, ' ');
2406
2407                 if (driver)
2408                         *driver++ = '\0';
2409                 conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
2410         }
2411
2412         if (conf == NULL || conf->bss == NULL) {
2413                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2414                            "for configuration", __func__);
2415                 goto fail;
2416         }
2417
2418         if (hostapd_data_alloc(hapd_iface, conf) < 0) {
2419                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2420                            "for hostapd", __func__);
2421                 goto fail;
2422         }
2423         conf = NULL;
2424
2425         if (start_ctrl_iface(hapd_iface) < 0)
2426                 goto fail;
2427
2428         wpa_printf(MSG_INFO, "Add interface '%s'",
2429                    hapd_iface->conf->bss[0]->iface);
2430
2431         return 0;
2432
2433 fail:
2434         if (conf)
2435                 hostapd_config_free(conf);
2436         if (hapd_iface) {
2437                 if (hapd_iface->bss) {
2438                         for (i = 0; i < hapd_iface->num_bss; i++) {
2439                                 hapd = hapd_iface->bss[i];
2440                                 if (!hapd)
2441                                         continue;
2442                                 if (hapd_iface->interfaces &&
2443                                     hapd_iface->interfaces->ctrl_iface_deinit)
2444                                         hapd_iface->interfaces->
2445                                                 ctrl_iface_deinit(hapd);
2446                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2447                                            __func__, hapd_iface->bss[i],
2448                                            hapd->conf->iface);
2449                                 hostapd_cleanup(hapd);
2450                                 os_free(hapd);
2451                                 hapd_iface->bss[i] = NULL;
2452                         }
2453                         os_free(hapd_iface->bss);
2454                         hapd_iface->bss = NULL;
2455                 }
2456                 if (new_iface) {
2457                         interfaces->count--;
2458                         interfaces->iface[interfaces->count] = NULL;
2459                 }
2460                 hostapd_cleanup_iface(hapd_iface);
2461         }
2462         return -1;
2463 }
2464
2465
2466 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
2467 {
2468         size_t i;
2469
2470         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
2471
2472         /* Remove hostapd_data only if it has already been initialized */
2473         if (idx < iface->num_bss) {
2474                 struct hostapd_data *hapd = iface->bss[idx];
2475
2476                 hostapd_bss_deinit(hapd);
2477                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2478                            __func__, hapd, hapd->conf->iface);
2479                 hostapd_config_free_bss(hapd->conf);
2480                 hapd->conf = NULL;
2481                 os_free(hapd);
2482
2483                 iface->num_bss--;
2484
2485                 for (i = idx; i < iface->num_bss; i++)
2486                         iface->bss[i] = iface->bss[i + 1];
2487         } else {
2488                 hostapd_config_free_bss(iface->conf->bss[idx]);
2489                 iface->conf->bss[idx] = NULL;
2490         }
2491
2492         iface->conf->num_bss--;
2493         for (i = idx; i < iface->conf->num_bss; i++)
2494                 iface->conf->bss[i] = iface->conf->bss[i + 1];
2495
2496         return 0;
2497 }
2498
2499
2500 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2501 {
2502         struct hostapd_iface *hapd_iface;
2503         size_t i, j, k = 0;
2504
2505         for (i = 0; i < interfaces->count; i++) {
2506                 hapd_iface = interfaces->iface[i];
2507                 if (hapd_iface == NULL)
2508                         return -1;
2509                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2510                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2511                         hapd_iface->driver_ap_teardown =
2512                                 !!(hapd_iface->drv_flags &
2513                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2514
2515                         hostapd_interface_deinit_free(hapd_iface);
2516                         k = i;
2517                         while (k < (interfaces->count - 1)) {
2518                                 interfaces->iface[k] =
2519                                         interfaces->iface[k + 1];
2520                                 k++;
2521                         }
2522                         interfaces->count--;
2523                         return 0;
2524                 }
2525
2526                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2527                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2528                                 hapd_iface->driver_ap_teardown =
2529                                         !(hapd_iface->drv_flags &
2530                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2531                                 return hostapd_remove_bss(hapd_iface, j);
2532                         }
2533                 }
2534         }
2535         return -1;
2536 }
2537
2538
2539 /**
2540  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2541  * @hapd: Pointer to BSS data
2542  * @sta: Pointer to the associated STA data
2543  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2544  *
2545  * This function will be called whenever a station associates with the AP. It
2546  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2547  * from drv_callbacks.c based on driver events for drivers that take care of
2548  * management frames (IEEE 802.11 authentication and association) internally.
2549  */
2550 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2551                            int reassoc)
2552 {
2553         if (hapd->tkip_countermeasures) {
2554                 hostapd_drv_sta_deauth(hapd, sta->addr,
2555                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2556                 return;
2557         }
2558
2559         hostapd_prune_associations(hapd, sta->addr);
2560
2561         /* IEEE 802.11F (IAPP) */
2562         if (hapd->conf->ieee802_11f)
2563                 iapp_new_station(hapd->iapp, sta);
2564
2565 #ifdef CONFIG_P2P
2566         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2567                 sta->no_p2p_set = 1;
2568                 hapd->num_sta_no_p2p++;
2569                 if (hapd->num_sta_no_p2p == 1)
2570                         hostapd_p2p_non_p2p_sta_connected(hapd);
2571         }
2572 #endif /* CONFIG_P2P */
2573
2574         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2575          * IEEE 802.1X/WPA code will start accounting after the station has
2576          * been authorized. */
2577         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2578                 ap_sta_set_authorized(hapd, sta, 1);
2579                 os_get_reltime(&sta->connected_time);
2580                 accounting_sta_start(hapd, sta);
2581         }
2582
2583         /* Start IEEE 802.1X authentication process for new stations */
2584         ieee802_1x_new_station(hapd, sta);
2585         if (reassoc) {
2586                 if (sta->auth_alg != WLAN_AUTH_FT &&
2587                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2588                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2589         } else
2590                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2591
2592         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2593                 wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
2594                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
2595                            __func__, MAC2STR(sta->addr),
2596                            hapd->conf->ap_max_inactivity);
2597                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2598                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2599                                        ap_handle_timer, hapd, sta);
2600         }
2601 }
2602
2603
2604 const char * hostapd_state_text(enum hostapd_iface_state s)
2605 {
2606         switch (s) {
2607         case HAPD_IFACE_UNINITIALIZED:
2608                 return "UNINITIALIZED";
2609         case HAPD_IFACE_DISABLED:
2610                 return "DISABLED";
2611         case HAPD_IFACE_COUNTRY_UPDATE:
2612                 return "COUNTRY_UPDATE";
2613         case HAPD_IFACE_ACS:
2614                 return "ACS";
2615         case HAPD_IFACE_HT_SCAN:
2616                 return "HT_SCAN";
2617         case HAPD_IFACE_DFS:
2618                 return "DFS";
2619         case HAPD_IFACE_ENABLED:
2620                 return "ENABLED";
2621         }
2622
2623         return "UNKNOWN";
2624 }
2625
2626
2627 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2628 {
2629         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2630                    iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2631                    hostapd_state_text(s));
2632         iface->state = s;
2633 }
2634
2635
2636 #ifdef NEED_AP_MLME
2637
2638 static void free_beacon_data(struct beacon_data *beacon)
2639 {
2640         os_free(beacon->head);
2641         beacon->head = NULL;
2642         os_free(beacon->tail);
2643         beacon->tail = NULL;
2644         os_free(beacon->probe_resp);
2645         beacon->probe_resp = NULL;
2646         os_free(beacon->beacon_ies);
2647         beacon->beacon_ies = NULL;
2648         os_free(beacon->proberesp_ies);
2649         beacon->proberesp_ies = NULL;
2650         os_free(beacon->assocresp_ies);
2651         beacon->assocresp_ies = NULL;
2652 }
2653
2654
2655 static int hostapd_build_beacon_data(struct hostapd_data *hapd,
2656                                      struct beacon_data *beacon)
2657 {
2658         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2659         struct wpa_driver_ap_params params;
2660         int ret;
2661
2662         os_memset(beacon, 0, sizeof(*beacon));
2663         ret = ieee802_11_build_ap_params(hapd, &params);
2664         if (ret < 0)
2665                 return ret;
2666
2667         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2668                                          &proberesp_extra,
2669                                          &assocresp_extra);
2670         if (ret)
2671                 goto free_ap_params;
2672
2673         ret = -1;
2674         beacon->head = os_malloc(params.head_len);
2675         if (!beacon->head)
2676                 goto free_ap_extra_ies;
2677
2678         os_memcpy(beacon->head, params.head, params.head_len);
2679         beacon->head_len = params.head_len;
2680
2681         beacon->tail = os_malloc(params.tail_len);
2682         if (!beacon->tail)
2683                 goto free_beacon;
2684
2685         os_memcpy(beacon->tail, params.tail, params.tail_len);
2686         beacon->tail_len = params.tail_len;
2687
2688         if (params.proberesp != NULL) {
2689                 beacon->probe_resp = os_malloc(params.proberesp_len);
2690                 if (!beacon->probe_resp)
2691                         goto free_beacon;
2692
2693                 os_memcpy(beacon->probe_resp, params.proberesp,
2694                           params.proberesp_len);
2695                 beacon->probe_resp_len = params.proberesp_len;
2696         }
2697
2698         /* copy the extra ies */
2699         if (beacon_extra) {
2700                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2701                 if (!beacon->beacon_ies)
2702                         goto free_beacon;
2703
2704                 os_memcpy(beacon->beacon_ies,
2705                           beacon_extra->buf, wpabuf_len(beacon_extra));
2706                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2707         }
2708
2709         if (proberesp_extra) {
2710                 beacon->proberesp_ies =
2711                         os_malloc(wpabuf_len(proberesp_extra));
2712                 if (!beacon->proberesp_ies)
2713                         goto free_beacon;
2714
2715                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2716                           wpabuf_len(proberesp_extra));
2717                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2718         }
2719
2720         if (assocresp_extra) {
2721                 beacon->assocresp_ies =
2722                         os_malloc(wpabuf_len(assocresp_extra));
2723                 if (!beacon->assocresp_ies)
2724                         goto free_beacon;
2725
2726                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2727                           wpabuf_len(assocresp_extra));
2728                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2729         }
2730
2731         ret = 0;
2732 free_beacon:
2733         /* if the function fails, the caller should not free beacon data */
2734         if (ret)
2735                 free_beacon_data(beacon);
2736
2737 free_ap_extra_ies:
2738         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2739                                   assocresp_extra);
2740 free_ap_params:
2741         ieee802_11_free_ap_params(&params);
2742         return ret;
2743 }
2744
2745
2746 /*
2747  * TODO: This flow currently supports only changing frequency within the
2748  * same hw_mode. Any other changes to MAC parameters or provided settings (even
2749  * width) are not supported.
2750  */
2751 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2752                                       struct hostapd_config *conf,
2753                                       struct hostapd_freq_params *params,
2754                                       struct hostapd_freq_params *old_params)
2755 {
2756         int channel;
2757
2758         if (!params->channel) {
2759                 /* check if the new channel is supported by hw */
2760                 params->channel = hostapd_hw_get_channel(hapd, params->freq);
2761         }
2762
2763         channel = params->channel;
2764         if (!channel)
2765                 return -1;
2766
2767         /* if a pointer to old_params is provided we save previous state */
2768         if (old_params) {
2769                 old_params->channel = conf->channel;
2770                 old_params->ht_enabled = conf->ieee80211n;
2771                 old_params->sec_channel_offset = conf->secondary_channel;
2772         }
2773
2774         conf->channel = channel;
2775         conf->ieee80211n = params->ht_enabled;
2776         conf->secondary_channel = params->sec_channel_offset;
2777
2778         /* TODO: maybe call here hostapd_config_check here? */
2779
2780         return 0;
2781 }
2782
2783
2784 static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
2785                                      struct csa_settings *settings)
2786 {
2787         struct hostapd_iface *iface = hapd->iface;
2788         struct hostapd_freq_params old_freq;
2789         int ret;
2790
2791         os_memset(&old_freq, 0, sizeof(old_freq));
2792         if (!iface || !iface->freq || hapd->csa_in_progress)
2793                 return -1;
2794
2795         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2796                                          &settings->freq_params,
2797                                          &old_freq);
2798         if (ret)
2799                 return ret;
2800
2801         ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
2802
2803         /* change back the configuration */
2804         hostapd_change_config_freq(iface->bss[0], iface->conf,
2805                                    &old_freq, NULL);
2806
2807         if (ret)
2808                 return ret;
2809
2810         /* set channel switch parameters for csa ie */
2811         hapd->cs_freq_params = settings->freq_params;
2812         hapd->cs_count = settings->cs_count;
2813         hapd->cs_block_tx = settings->block_tx;
2814
2815         ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
2816         if (ret) {
2817                 free_beacon_data(&settings->beacon_after);
2818                 return ret;
2819         }
2820
2821         settings->counter_offset_beacon = hapd->cs_c_off_beacon;
2822         settings->counter_offset_presp = hapd->cs_c_off_proberesp;
2823
2824         return 0;
2825 }
2826
2827
2828 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2829 {
2830         os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
2831         hapd->cs_count = 0;
2832         hapd->cs_block_tx = 0;
2833         hapd->cs_c_off_beacon = 0;
2834         hapd->cs_c_off_proberesp = 0;
2835         hapd->csa_in_progress = 0;
2836 }
2837
2838
2839 int hostapd_switch_channel(struct hostapd_data *hapd,
2840                            struct csa_settings *settings)
2841 {
2842         int ret;
2843
2844         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
2845                 wpa_printf(MSG_INFO, "CSA is not supported");
2846                 return -1;
2847         }
2848
2849         ret = hostapd_fill_csa_settings(hapd, settings);
2850         if (ret)
2851                 return ret;
2852
2853         ret = hostapd_drv_switch_channel(hapd, settings);
2854         free_beacon_data(&settings->beacon_csa);
2855         free_beacon_data(&settings->beacon_after);
2856
2857         if (ret) {
2858                 /* if we failed, clean cs parameters */
2859                 hostapd_cleanup_cs_params(hapd);
2860                 return ret;
2861         }
2862
2863         hapd->csa_in_progress = 1;
2864         return 0;
2865 }
2866
2867
2868 void
2869 hostapd_switch_channel_fallback(struct hostapd_iface *iface,
2870                                 const struct hostapd_freq_params *freq_params)
2871 {
2872         int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
2873         unsigned int i;
2874
2875         wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
2876
2877         if (freq_params->center_freq1)
2878                 vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
2879         if (freq_params->center_freq2)
2880                 vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
2881
2882         switch (freq_params->bandwidth) {
2883         case 0:
2884         case 20:
2885         case 40:
2886                 vht_bw = VHT_CHANWIDTH_USE_HT;
2887                 break;
2888         case 80:
2889                 if (freq_params->center_freq2)
2890                         vht_bw = VHT_CHANWIDTH_80P80MHZ;
2891                 else
2892                         vht_bw = VHT_CHANWIDTH_80MHZ;
2893                 break;
2894         case 160:
2895                 vht_bw = VHT_CHANWIDTH_160MHZ;
2896                 break;
2897         default:
2898                 wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
2899                            freq_params->bandwidth);
2900                 break;
2901         }
2902
2903         iface->freq = freq_params->freq;
2904         iface->conf->channel = freq_params->channel;
2905         iface->conf->secondary_channel = freq_params->sec_channel_offset;
2906         iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
2907         iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
2908         iface->conf->vht_oper_chwidth = vht_bw;
2909         iface->conf->ieee80211n = freq_params->ht_enabled;
2910         iface->conf->ieee80211ac = freq_params->vht_enabled;
2911
2912         /*
2913          * cs_params must not be cleared earlier because the freq_params
2914          * argument may actually point to one of these.
2915          */
2916         for (i = 0; i < iface->num_bss; i++)
2917                 hostapd_cleanup_cs_params(iface->bss[i]);
2918
2919         hostapd_disable_iface(iface);
2920         hostapd_enable_iface(iface);
2921 }
2922
2923
2924 struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
2925                                         const char *ifname)
2926 {
2927         size_t i, j;
2928
2929         for (i = 0; i < interfaces->count; i++) {
2930                 struct hostapd_iface *iface = interfaces->iface[i];
2931
2932                 for (j = 0; j < iface->num_bss; j++) {
2933                         struct hostapd_data *hapd = iface->bss[j];
2934
2935                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
2936                                 return hapd;
2937                 }
2938         }
2939
2940         return NULL;
2941 }
2942
2943 #endif /* NEED_AP_MLME */
2944
2945
2946 void hostapd_periodic_iface(struct hostapd_iface *iface)
2947 {
2948         size_t i;
2949
2950         ap_list_timer(iface);
2951
2952         for (i = 0; i < iface->num_bss; i++) {
2953                 struct hostapd_data *hapd = iface->bss[i];
2954
2955                 if (!hapd->started)
2956                         continue;
2957
2958 #ifndef CONFIG_NO_RADIUS
2959                 hostapd_acl_expire(hapd);
2960 #endif /* CONFIG_NO_RADIUS */
2961         }
2962 }