src/ap/hostapd.c

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