src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2009, 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 "radius/radius_client.h"
  15 #include "drivers/driver.h"
  16 #include "hostapd.h"
  17 #include "authsrv.h"
  18 #include "sta_info.h"
  19 #include "accounting.h"
  20 #include "ap_list.h"
  21 #include "beacon.h"
  22 #include "iapp.h"
  23 #include "ieee802_1x.h"
  24 #include "ieee802_11_auth.h"
  25 #include "vlan_init.h"
  26 #include "wpa_auth.h"
  27 #include "wps_hostapd.h"
  28 #include "hw_features.h"
  29 #include "wpa_auth_glue.h"
  30 #include "ap_drv_ops.h"
  31 #include "ap_config.h"
  32 #include "p2p_hostapd.h"
  33
  34
  35 static int hostapd_flush_old_stations(struct hostapd_data *hapd);
  36 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  37 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  38
  39 extern int wpa_debug_level;
  40
  41
  42 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  43                                int (*cb)(struct hostapd_iface *iface,
  44                                          void *ctx), void *ctx)
  45 {
  46         size_t i;
  47         int ret;
  48
  49         for (i = 0; i < interfaces->count; i++) {
  50                 ret = cb(interfaces->iface[i], ctx);
  51                 if (ret)
  52                         return ret;
  53         }
  54
  55         return 0;
  56 }
  57
  58
  59 static void hostapd_reload_bss(struct hostapd_data *hapd)
  60 {
  61 #ifndef CONFIG_NO_RADIUS
  62         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  63 #endif /* CONFIG_NO_RADIUS */
  64
  65         if (hostapd_setup_wpa_psk(hapd->conf)) {
  66                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  67                            "after reloading configuration");
  68         }
  69
  70         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  71                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  72         else
  73                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  74
  75         if (hapd->conf->wpa && hapd->wpa_auth == NULL) {
  76                 hostapd_setup_wpa(hapd);
  77                 if (hapd->wpa_auth)
  78                         wpa_init_keys(hapd->wpa_auth);
  79         } else if (hapd->conf->wpa) {
  80                 const u8 *wpa_ie;
  81                 size_t wpa_ie_len;
  82                 hostapd_reconfig_wpa(hapd);
  83                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
  84                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
  85                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
  86                                    "the kernel driver.");
  87         } else if (hapd->wpa_auth) {
  88                 wpa_deinit(hapd->wpa_auth);
  89                 hapd->wpa_auth = NULL;
  90                 hostapd_set_privacy(hapd, 0);
  91                 hostapd_setup_encryption(hapd->conf->iface, hapd);
  92                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
  93         }
  94
  95         ieee802_11_set_beacon(hapd);
  96         hostapd_update_wps(hapd);
  97
  98         if (hapd->conf->ssid.ssid_set &&
  99             hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
 100                              hapd->conf->ssid.ssid_len)) {
 101                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 102                 /* try to continue */
 103         }
 104         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 105 }
 106
 107
 108 int hostapd_reload_config(struct hostapd_iface *iface)
 109 {
 110         struct hostapd_data *hapd = iface->bss[0];
 111         struct hostapd_config *newconf, *oldconf;
 112         size_t j;
 113
 114         if (iface->config_read_cb == NULL)
 115                 return -1;
 116         newconf = iface->config_read_cb(iface->config_fname);
 117         if (newconf == NULL)
 118                 return -1;
 119
 120         /*
 121          * Deauthenticate all stations since the new configuration may not
 122          * allow them to use the BSS anymore.
 123          */
 124         for (j = 0; j < iface->num_bss; j++) {
 125                 hostapd_flush_old_stations(iface->bss[j]);
 126                 hostapd_broadcast_wep_clear(iface->bss[j]);
 127
 128 #ifndef CONFIG_NO_RADIUS
 129                 /* TODO: update dynamic data based on changed configuration
 130                  * items (e.g., open/close sockets, etc.) */
 131                 radius_client_flush(iface->bss[j]->radius, 0);
 132 #endif /* CONFIG_NO_RADIUS */
 133         }
 134
 135         oldconf = hapd->iconf;
 136         iface->conf = newconf;
 137
 138         for (j = 0; j < iface->num_bss; j++) {
 139                 hapd = iface->bss[j];
 140                 hapd->iconf = newconf;
 141                 hapd->conf = &newconf->bss[j];
 142                 hostapd_reload_bss(hapd);
 143         }
 144
 145         hostapd_config_free(oldconf);
 146
 147
 148         return 0;
 149 }
 150
 151
 152 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 153                                               char *ifname)
 154 {
 155         int i;
 156
 157         for (i = 0; i < NUM_WEP_KEYS; i++) {
 158                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 159                                         0, NULL, 0, NULL, 0)) {
 160                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 161                                    "encryption keys (ifname=%s keyidx=%d)",
 162                                    ifname, i);
 163                 }
 164         }
 165 #ifdef CONFIG_IEEE80211W
 166         if (hapd->conf->ieee80211w) {
 167                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 168                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 169                                                 NULL, i, 0, NULL,
 170                                                 0, NULL, 0)) {
 171                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 172                                            "default mgmt encryption keys "
 173                                            "(ifname=%s keyidx=%d)", ifname, i);
 174                         }
 175                 }
 176         }
 177 #endif /* CONFIG_IEEE80211W */
 178 }
 179
 180
 181 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 182 {
 183         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 184         return 0;
 185 }
 186
 187
 188 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 189 {
 190         int errors = 0, idx;
 191         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 192
 193         idx = ssid->wep.idx;
 194         if (ssid->wep.default_len &&
 195             hostapd_drv_set_key(hapd->conf->iface,
 196                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 197                                 1, NULL, 0, ssid->wep.key[idx],
 198                                 ssid->wep.len[idx])) {
 199                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 200                 errors++;
 201         }
 202
 203         if (ssid->dyn_vlan_keys) {
 204                 size_t i;
 205                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 206                         const char *ifname;
 207                         struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
 208                         if (key == NULL)
 209                                 continue;
 210                         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 211                                                             i);
 212                         if (ifname == NULL)
 213                                 continue;
 214
 215                         idx = key->idx;
 216                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
 217                                                 broadcast_ether_addr, idx, 1,
 218                                                 NULL, 0, key->key[idx],
 219                                                 key->len[idx])) {
 220                                 wpa_printf(MSG_WARNING, "Could not set "
 221                                            "dynamic VLAN WEP encryption.");
 222                                 errors++;
 223                         }
 224                 }
 225         }
 226
 227         return errors;
 228 }
 229
 230 /**
 231  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 232  * @hapd: Pointer to BSS data
 233  *
 234  * This function is used to free all per-BSS data structures and resources.
 235  * This gets called in a loop for each BSS between calls to
 236  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 237  * is deinitialized. Most of the modules that are initialized in
 238  * hostapd_setup_bss() are deinitialized here.
 239  */
 240 static void hostapd_cleanup(struct hostapd_data *hapd)
 241 {
 242         if (hapd->iface->ctrl_iface_deinit)
 243                 hapd->iface->ctrl_iface_deinit(hapd);
 244
 245         iapp_deinit(hapd->iapp);
 246         hapd->iapp = NULL;
 247         accounting_deinit(hapd);
 248         hostapd_deinit_wpa(hapd);
 249         vlan_deinit(hapd);
 250         hostapd_acl_deinit(hapd);
 251 #ifndef CONFIG_NO_RADIUS
 252         radius_client_deinit(hapd->radius);
 253         hapd->radius = NULL;
 254 #endif /* CONFIG_NO_RADIUS */
 255
 256         hostapd_deinit_wps(hapd);
 257
 258         authsrv_deinit(hapd);
 259
 260         if (hapd->interface_added &&
 261             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 262                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 263                            hapd->conf->iface);
 264         }
 265
 266         os_free(hapd->probereq_cb);
 267         hapd->probereq_cb = NULL;
 268
 269 #ifdef CONFIG_P2P
 270         wpabuf_free(hapd->p2p_beacon_ie);
 271         hapd->p2p_beacon_ie = NULL;
 272         wpabuf_free(hapd->p2p_probe_resp_ie);
 273         hapd->p2p_probe_resp_ie = NULL;
 274 #endif /* CONFIG_P2P */
 275
 276         wpabuf_free(hapd->time_adv);
 277 }
 278
 279
 280 /**
 281  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 282  * @iface: Pointer to interface data
 283  *
 284  * This function is called before per-BSS data structures are deinitialized
 285  * with hostapd_cleanup().
 286  */
 287 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 288 {
 289 }
 290
 291
 292 /**
 293  * hostapd_cleanup_iface - Complete per-interface cleanup
 294  * @iface: Pointer to interface data
 295  *
 296  * This function is called after per-BSS data structures are deinitialized
 297  * with hostapd_cleanup().
 298  */
 299 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 300 {
 301         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 302         iface->hw_features = NULL;
 303         os_free(iface->current_rates);
 304         iface->current_rates = NULL;
 305         os_free(iface->basic_rates);
 306         iface->basic_rates = NULL;
 307         ap_list_deinit(iface);
 308         hostapd_config_free(iface->conf);
 309         iface->conf = NULL;
 310
 311         os_free(iface->config_fname);
 312         os_free(iface->bss);
 313         os_free(iface);
 314 }
 315
 316
 317 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 318 {
 319         int i;
 320
 321         hostapd_broadcast_wep_set(hapd);
 322
 323         if (hapd->conf->ssid.wep.default_len) {
 324                 hostapd_set_privacy(hapd, 1);
 325                 return 0;
 326         }
 327
 328         /*
 329          * When IEEE 802.1X is not enabled, the driver may need to know how to
 330          * set authentication algorithms for static WEP.
 331          */
 332         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 333
 334         for (i = 0; i < 4; i++) {
 335                 if (hapd->conf->ssid.wep.key[i] &&
 336                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 337                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 338                                         hapd->conf->ssid.wep.key[i],
 339                                         hapd->conf->ssid.wep.len[i])) {
 340                         wpa_printf(MSG_WARNING, "Could not set WEP "
 341                                    "encryption.");
 342                         return -1;
 343                 }
 344                 if (hapd->conf->ssid.wep.key[i] &&
 345                     i == hapd->conf->ssid.wep.idx)
 346                         hostapd_set_privacy(hapd, 1);
 347         }
 348
 349         return 0;
 350 }
 351
 352
 353 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 354 {
 355         int ret = 0;
 356         u8 addr[ETH_ALEN];
 357
 358         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 359                 return 0;
 360
 361         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Flushing old station entries");
 362         if (hostapd_flush(hapd)) {
 363                 wpa_msg(hapd->msg_ctx, MSG_WARNING, "Could not connect to "
 364                         "kernel driver");
 365                 ret = -1;
 366         }
 367         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 368         os_memset(addr, 0xff, ETH_ALEN);
 369         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 370         hostapd_free_stas(hapd);
 371
 372         return ret;
 373 }
 374
 375
 376 /**
 377  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 378  * @iface: Pointer to interface data
 379  * Returns: 0 on success, -1 on failure
 380  *
 381  * This function is used to validate that the configured BSSIDs are valid.
 382  */
 383 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 384 {
 385         u8 mask[ETH_ALEN] = { 0 };
 386         struct hostapd_data *hapd = iface->bss[0];
 387         unsigned int i = iface->conf->num_bss, bits = 0, j;
 388         int auto_addr = 0;
 389
 390         if (hostapd_drv_none(hapd))
 391                 return 0;
 392
 393         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 394
 395         /* Determine the bits necessary to cover the number of BSSIDs. */
 396         for (i--; i; i >>= 1)
 397                 bits++;
 398
 399         /* Determine the bits necessary to any configured BSSIDs,
 400            if they are higher than the number of BSSIDs. */
 401         for (j = 0; j < iface->conf->num_bss; j++) {
 402                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 403                         if (j)
 404                                 auto_addr++;
 405                         continue;
 406                 }
 407
 408                 for (i = 0; i < ETH_ALEN; i++) {
 409                         mask[i] |=
 410                                 iface->conf->bss[j].bssid[i] ^
 411                                 hapd->own_addr[i];
 412                 }
 413         }
 414
 415         if (!auto_addr)
 416                 goto skip_mask_ext;
 417
 418         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 419                 ;
 420         j = 0;
 421         if (i < ETH_ALEN) {
 422                 j = (5 - i) * 8;
 423
 424                 while (mask[i] != 0) {
 425                         mask[i] >>= 1;
 426                         j++;
 427                 }
 428         }
 429
 430         if (bits < j)
 431                 bits = j;
 432
 433         if (bits > 40) {
 434                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 435                            bits);
 436                 return -1;
 437         }
 438
 439         os_memset(mask, 0xff, ETH_ALEN);
 440         j = bits / 8;
 441         for (i = 5; i > 5 - j; i--)
 442                 mask[i] = 0;
 443         j = bits % 8;
 444         while (j--)
 445                 mask[i] <<= 1;
 446
 447 skip_mask_ext:
 448         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 449                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 450
 451         if (!auto_addr)
 452                 return 0;
 453
 454         for (i = 0; i < ETH_ALEN; i++) {
 455                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 456                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 457                                    " for start address " MACSTR ".",
 458                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 459                         wpa_printf(MSG_ERROR, "Start address must be the "
 460                                    "first address in the block (i.e., addr "
 461                                    "AND mask == addr).");
 462                         return -1;
 463                 }
 464         }
 465
 466         return 0;
 467 }
 468
 469
 470 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 471 {
 472         size_t i;
 473
 474         for (i = 0; i < conf->num_bss; i++) {
 475                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 476                         return 1;
 477                 }
 478         }
 479
 480         return 0;
 481 }
 482
 483
 484
 485
 486 /**
 487  * hostapd_setup_bss - Per-BSS setup (initialization)
 488  * @hapd: Pointer to BSS data
 489  * @first: Whether this BSS is the first BSS of an interface
 490  *
 491  * This function is used to initialize all per-BSS data structures and
 492  * resources. This gets called in a loop for each BSS when an interface is
 493  * initialized. Most of the modules that are initialized here will be
 494  * deinitialized in hostapd_cleanup().
 495  */
 496 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 497 {
 498         struct hostapd_bss_config *conf = hapd->conf;
 499         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 500         int ssid_len, set_ssid;
 501         char force_ifname[IFNAMSIZ];
 502         u8 if_addr[ETH_ALEN];
 503
 504         if (!first) {
 505                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 506                         /* Allocate the next available BSSID. */
 507                         do {
 508                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 509                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 510                 } else {
 511                         /* Allocate the configured BSSID. */
 512                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 513
 514                         if (hostapd_mac_comp(hapd->own_addr,
 515                                              hapd->iface->bss[0]->own_addr) ==
 516                             0) {
 517                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 518                                            "BSSID set to the MAC address of "
 519                                            "the radio", hapd->conf->iface);
 520                                 return -1;
 521                         }
 522                 }
 523
 524                 hapd->interface_added = 1;
 525                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 526                                    hapd->conf->iface, hapd->own_addr, hapd,
 527                                    &hapd->drv_priv, force_ifname, if_addr,
 528                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 529                                    NULL)) {
 530                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 531                                    MACSTR ")", MAC2STR(hapd->own_addr));
 532                         return -1;
 533                 }
 534         }
 535
 536         if (conf->wmm_enabled < 0)
 537                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 538
 539         hostapd_flush_old_stations(hapd);
 540         hostapd_set_privacy(hapd, 0);
 541
 542         hostapd_broadcast_wep_clear(hapd);
 543         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 544                 return -1;
 545
 546         /*
 547          * Fetch the SSID from the system and use it or,
 548          * if one was specified in the config file, verify they
 549          * match.
 550          */
 551         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 552         if (ssid_len < 0) {
 553                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 554                 return -1;
 555         }
 556         if (conf->ssid.ssid_set) {
 557                 /*
 558                  * If SSID is specified in the config file and it differs
 559                  * from what is being used then force installation of the
 560                  * new SSID.
 561                  */
 562                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 563                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 564         } else {
 565                 /*
 566                  * No SSID in the config file; just use the one we got
 567                  * from the system.
 568                  */
 569                 set_ssid = 0;
 570                 conf->ssid.ssid_len = ssid_len;
 571                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 572                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 573         }
 574
 575         if (!hostapd_drv_none(hapd)) {
 576                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 577                            " and ssid '%s'",
 578                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 579                            hapd->conf->ssid.ssid);
 580         }
 581
 582         if (hostapd_setup_wpa_psk(conf)) {
 583                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 584                 return -1;
 585         }
 586
 587         /* Set SSID for the kernel driver (to be used in beacon and probe
 588          * response frames) */
 589         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 590                                          conf->ssid.ssid_len)) {
 591                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 592                 return -1;
 593         }
 594
 595         if (wpa_debug_level == MSG_MSGDUMP)
 596                 conf->radius->msg_dumps = 1;
 597 #ifndef CONFIG_NO_RADIUS
 598         hapd->radius = radius_client_init(hapd, conf->radius);
 599         if (hapd->radius == NULL) {
 600                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 601                 return -1;
 602         }
 603 #endif /* CONFIG_NO_RADIUS */
 604
 605         if (hostapd_acl_init(hapd)) {
 606                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 607                 return -1;
 608         }
 609         if (hostapd_init_wps(hapd, conf))
 610                 return -1;
 611
 612         if (authsrv_init(hapd) < 0)
 613                 return -1;
 614
 615         if (ieee802_1x_init(hapd)) {
 616                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 617                 return -1;
 618         }
 619
 620         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 621                 return -1;
 622
 623         if (accounting_init(hapd)) {
 624                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 625                 return -1;
 626         }
 627
 628         if (hapd->conf->ieee802_11f &&
 629             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 630                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 631                            "failed.");
 632                 return -1;
 633         }
 634
 635         if (hapd->iface->ctrl_iface_init &&
 636             hapd->iface->ctrl_iface_init(hapd)) {
 637                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 638                 return -1;
 639         }
 640
 641         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 642                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 643                 return -1;
 644         }
 645
 646         ieee802_11_set_beacon(hapd);
 647
 648         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 649                 return -1;
 650
 651         if (hapd->driver && hapd->driver->set_operstate)
 652                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 653
 654         return 0;
 655 }
 656
 657
 658 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 659 {
 660         struct hostapd_data *hapd = iface->bss[0];
 661         int i;
 662         struct hostapd_tx_queue_params *p;
 663
 664         for (i = 0; i < NUM_TX_QUEUES; i++) {
 665                 p = &iface->conf->tx_queue[i];
 666
 667                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 668                                                 p->cwmax, p->burst)) {
 669                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 670                                    "parameters for queue %d.", i);
 671                         /* Continue anyway */
 672                 }
 673         }
 674 }
 675
 676
 677 static int setup_interface(struct hostapd_iface *iface)
 678 {
 679         struct hostapd_data *hapd = iface->bss[0];
 680         size_t i;
 681         char country[4];
 682
 683         /*
 684          * Make sure that all BSSes get configured with a pointer to the same
 685          * driver interface.
 686          */
 687         for (i = 1; i < iface->num_bss; i++) {
 688                 iface->bss[i]->driver = hapd->driver;
 689                 iface->bss[i]->drv_priv = hapd->drv_priv;
 690         }
 691
 692         if (hostapd_validate_bssid_configuration(iface))
 693                 return -1;
 694
 695         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 696                 os_memcpy(country, hapd->iconf->country, 3);
 697                 country[3] = '\0';
 698                 if (hostapd_set_country(hapd, country) < 0) {
 699                         wpa_printf(MSG_ERROR, "Failed to set country code");
 700                         return -1;
 701                 }
 702         }
 703
 704         if (hostapd_get_hw_features(iface)) {
 705                 /* Not all drivers support this yet, so continue without hw
 706                  * feature data. */
 707         } else {
 708                 int ret = hostapd_select_hw_mode(iface);
 709                 if (ret < 0) {
 710                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 711                                    "channel. (%d)", ret);
 712                         return -1;
 713                 }
 714                 ret = hostapd_check_ht_capab(iface);
 715                 if (ret < 0)
 716                         return -1;
 717                 if (ret == 1) {
 718                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 719                                    "be completed in a callback");
 720                         return 0;
 721                 }
 722         }
 723         return hostapd_setup_interface_complete(iface, 0);
 724 }
 725
 726
 727 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 728 {
 729         struct hostapd_data *hapd = iface->bss[0];
 730         size_t j;
 731         u8 *prev_addr;
 732
 733         if (err) {
 734                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 735                 eloop_terminate();
 736                 return -1;
 737         }
 738
 739         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 740         if (hapd->iconf->channel) {
 741                 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 742                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 743                            "Frequency: %d MHz",
 744                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 745                            hapd->iconf->channel, iface->freq);
 746
 747                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 748                                      hapd->iconf->channel,
 749                                      hapd->iconf->ieee80211n,
 750                                      hapd->iconf->secondary_channel)) {
 751                         wpa_printf(MSG_ERROR, "Could not set channel for "
 752                                    "kernel driver");
 753                         return -1;
 754                 }
 755         }
 756
 757         if (iface->current_mode) {
 758                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
 759                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
 760                                    "table.");
 761                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 762                                        HOSTAPD_LEVEL_WARNING,
 763                                        "Failed to prepare rates table.");
 764                         return -1;
 765                 }
 766         }
 767
 768         if (hapd->iconf->rts_threshold > -1 &&
 769             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 770                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 771                            "kernel driver");
 772                 return -1;
 773         }
 774
 775         if (hapd->iconf->fragm_threshold > -1 &&
 776             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 777                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 778                            "for kernel driver");
 779                 return -1;
 780         }
 781
 782         prev_addr = hapd->own_addr;
 783
 784         for (j = 0; j < iface->num_bss; j++) {
 785                 hapd = iface->bss[j];
 786                 if (j)
 787                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 788                 if (hostapd_setup_bss(hapd, j == 0))
 789                         return -1;
 790                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 791                         prev_addr = hapd->own_addr;
 792         }
 793
 794         hostapd_tx_queue_params(iface);
 795
 796         ap_list_init(iface);
 797
 798         if (hostapd_driver_commit(hapd) < 0) {
 799                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 800                            "configuration", __func__);
 801                 return -1;
 802         }
 803
 804         /*
 805          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
 806          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
 807          * mode), the interface is up only after driver_commit, so initialize
 808          * WPS after driver_commit.
 809          */
 810         for (j = 0; j < iface->num_bss; j++) {
 811                 if (hostapd_init_wps_complete(iface->bss[j]))
 812                         return -1;
 813         }
 814
 815         if (hapd->setup_complete_cb)
 816                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
 817
 818         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 819                    iface->bss[0]->conf->iface);
 820
 821         return 0;
 822 }
 823
 824
 825 /**
 826  * hostapd_setup_interface - Setup of an interface
 827  * @iface: Pointer to interface data.
 828  * Returns: 0 on success, -1 on failure
 829  *
 830  * Initializes the driver interface, validates the configuration,
 831  * and sets driver parameters based on the configuration.
 832  * Flushes old stations, sets the channel, encryption,
 833  * beacons, and WDS links based on the configuration.
 834  */
 835 int hostapd_setup_interface(struct hostapd_iface *iface)
 836 {
 837         int ret;
 838
 839         ret = setup_interface(iface);
 840         if (ret) {
 841                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 842                            iface->bss[0]->conf->iface);
 843                 return -1;
 844         }
 845
 846         return 0;
 847 }
 848
 849
 850 /**
 851  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 852  * @hapd_iface: Pointer to interface data
 853  * @conf: Pointer to per-interface configuration
 854  * @bss: Pointer to per-BSS configuration for this BSS
 855  * Returns: Pointer to allocated BSS data
 856  *
 857  * This function is used to allocate per-BSS data structure. This data will be
 858  * freed after hostapd_cleanup() is called for it during interface
 859  * deinitialization.
 860  */
 861 struct hostapd_data *
 862 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 863                        struct hostapd_config *conf,
 864                        struct hostapd_bss_config *bss)
 865 {
 866         struct hostapd_data *hapd;
 867
 868         hapd = os_zalloc(sizeof(*hapd));
 869         if (hapd == NULL)
 870                 return NULL;
 871
 872         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 873         hapd->iconf = conf;
 874         hapd->conf = bss;
 875         hapd->iface = hapd_iface;
 876         hapd->driver = hapd->iconf->driver;
 877         hapd->ctrl_sock = -1;
 878
 879         return hapd;
 880 }
 881
 882
 883 void hostapd_interface_deinit(struct hostapd_iface *iface)
 884 {
 885         size_t j;
 886
 887         if (iface == NULL)
 888                 return;
 889
 890         hostapd_cleanup_iface_pre(iface);
 891         for (j = 0; j < iface->num_bss; j++) {
 892                 struct hostapd_data *hapd = iface->bss[j];
 893                 hostapd_free_stas(hapd);
 894                 hostapd_flush_old_stations(hapd);
 895                 hostapd_cleanup(hapd);
 896         }
 897 }
 898
 899
 900 void hostapd_interface_free(struct hostapd_iface *iface)
 901 {
 902         size_t j;
 903         for (j = 0; j < iface->num_bss; j++)
 904                 os_free(iface->bss[j]);
 905         hostapd_cleanup_iface(iface);
 906 }
 907
 908
 909 /**
 910  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 911  * @hapd: Pointer to BSS data
 912  * @sta: Pointer to the associated STA data
 913  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 914  *
 915  * This function will be called whenever a station associates with the AP. It
 916  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 917  * from drv_callbacks.c based on driver events for drivers that take care of
 918  * management frames (IEEE 802.11 authentication and association) internally.
 919  */
 920 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 921                            int reassoc)
 922 {
 923         if (hapd->tkip_countermeasures) {
 924                 hostapd_drv_sta_deauth(hapd, sta->addr,
 925                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
 926                 return;
 927         }
 928
 929         hostapd_prune_associations(hapd, sta->addr);
 930
 931         /* IEEE 802.11F (IAPP) */
 932         if (hapd->conf->ieee802_11f)
 933                 iapp_new_station(hapd->iapp, sta);
 934
 935 #ifdef CONFIG_P2P
 936         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
 937                 sta->no_p2p_set = 1;
 938                 hapd->num_sta_no_p2p++;
 939                 if (hapd->num_sta_no_p2p == 1)
 940                         hostapd_p2p_non_p2p_sta_connected(hapd);
 941         }
 942 #endif /* CONFIG_P2P */
 943
 944         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 945          * IEEE 802.1X/WPA code will start accounting after the station has
 946          * been authorized. */
 947         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 948                 accounting_sta_start(hapd, sta);
 949
 950         /* Start IEEE 802.1X authentication process for new stations */
 951         ieee802_1x_new_station(hapd, sta);
 952         if (reassoc) {
 953                 if (sta->auth_alg != WLAN_AUTH_FT &&
 954                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 955                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 956         } else
 957                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 958 }