src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16
  17 #include "utils/common.h"
  18 #include "utils/eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "radius/radius_client.h"
  21 #include "drivers/driver.h"
  22 #include "hostapd.h"
  23 #include "authsrv.h"
  24 #include "sta_info.h"
  25 #include "accounting.h"
  26 #include "ap_list.h"
  27 #include "beacon.h"
  28 #include "iapp.h"
  29 #include "ieee802_1x.h"
  30 #include "ieee802_11_auth.h"
  31 #include "vlan_init.h"
  32 #include "wpa_auth.h"
  33 #include "wps_hostapd.h"
  34 #include "hw_features.h"
  35 #include "wpa_auth_glue.h"
  36 #include "ap_drv_ops.h"
  37 #include "ap_config.h"
  38 #include "p2p_hostapd.h"
  39
  40
  41 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  42 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  43 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  44
  45 extern int wpa_debug_level;
  46
  47
  48 static void hostapd_reload_bss(struct hostapd_data *hapd)
  49 {
  50 #ifndef CONFIG_NO_RADIUS
  51         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  52 #endif /* CONFIG_NO_RADIUS */
  53
  54         if (hostapd_setup_wpa_psk(hapd->conf)) {
  55                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  56                            "after reloading configuration");
  57         }
  58
  59         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  60                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  61         else
  62                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  63
  64         if (hapd->conf->wpa && hapd->wpa_auth == NULL) {
  65                 hostapd_setup_wpa(hapd);
  66                 if (hapd->wpa_auth)
  67                         wpa_init_keys(hapd->wpa_auth);
  68         } else if (hapd->conf->wpa) {
  69                 const u8 *wpa_ie;
  70                 size_t wpa_ie_len;
  71                 hostapd_reconfig_wpa(hapd);
  72                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
  73                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
  74                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
  75                                    "the kernel driver.");
  76         } else if (hapd->wpa_auth) {
  77                 wpa_deinit(hapd->wpa_auth);
  78                 hapd->wpa_auth = NULL;
  79                 hostapd_set_privacy(hapd, 0);
  80                 hostapd_setup_encryption(hapd->conf->iface, hapd);
  81                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
  82         }
  83
  84         ieee802_11_set_beacon(hapd);
  85         hostapd_update_wps(hapd);
  86
  87         if (hapd->conf->ssid.ssid_set &&
  88             hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
  89                              hapd->conf->ssid.ssid_len)) {
  90                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
  91                 /* try to continue */
  92         }
  93         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
  94 }
  95
  96
  97 int hostapd_reload_config(struct hostapd_iface *iface)
  98 {
  99         struct hostapd_data *hapd = iface->bss[0];
 100         struct hostapd_config *newconf, *oldconf;
 101         size_t j;
 102
 103         if (iface->config_read_cb == NULL)
 104                 return -1;
 105         newconf = iface->config_read_cb(iface->config_fname);
 106         if (newconf == NULL)
 107                 return -1;
 108
 109         /*
 110          * Deauthenticate all stations since the new configuration may not
 111          * allow them to use the BSS anymore.
 112          */
 113         for (j = 0; j < iface->num_bss; j++) {
 114                 hostapd_flush_old_stations(iface->bss[j],
 115                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 116                 hostapd_broadcast_wep_clear(iface->bss[j]);
 117
 118 #ifndef CONFIG_NO_RADIUS
 119                 /* TODO: update dynamic data based on changed configuration
 120                  * items (e.g., open/close sockets, etc.) */
 121                 radius_client_flush(iface->bss[j]->radius, 0);
 122 #endif /* CONFIG_NO_RADIUS */
 123         }
 124
 125         oldconf = hapd->iconf;
 126         iface->conf = newconf;
 127
 128         for (j = 0; j < iface->num_bss; j++) {
 129                 hapd = iface->bss[j];
 130                 hapd->iconf = newconf;
 131                 hapd->conf = &newconf->bss[j];
 132                 hostapd_reload_bss(hapd);
 133         }
 134
 135         hostapd_config_free(oldconf);
 136
 137
 138         return 0;
 139 }
 140
 141
 142 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 143                                               char *ifname)
 144 {
 145         int i;
 146
 147         for (i = 0; i < NUM_WEP_KEYS; i++) {
 148                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 149                                         0, NULL, 0, NULL, 0)) {
 150                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 151                                    "encryption keys (ifname=%s keyidx=%d)",
 152                                    ifname, i);
 153                 }
 154         }
 155 #ifdef CONFIG_IEEE80211W
 156         if (hapd->conf->ieee80211w) {
 157                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 158                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 159                                                 NULL, i, 0, NULL,
 160                                                 0, NULL, 0)) {
 161                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 162                                            "default mgmt encryption keys "
 163                                            "(ifname=%s keyidx=%d)", ifname, i);
 164                         }
 165                 }
 166         }
 167 #endif /* CONFIG_IEEE80211W */
 168 }
 169
 170
 171 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 172 {
 173         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 174         return 0;
 175 }
 176
 177
 178 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 179 {
 180         int errors = 0, idx;
 181         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 182
 183         idx = ssid->wep.idx;
 184         if (ssid->wep.default_len &&
 185             hostapd_drv_set_key(hapd->conf->iface,
 186                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 187                                 1, NULL, 0, ssid->wep.key[idx],
 188                                 ssid->wep.len[idx])) {
 189                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 190                 errors++;
 191         }
 192
 193         if (ssid->dyn_vlan_keys) {
 194                 size_t i;
 195                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 196                         const char *ifname;
 197                         struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
 198                         if (key == NULL)
 199                                 continue;
 200                         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 201                                                             i);
 202                         if (ifname == NULL)
 203                                 continue;
 204
 205                         idx = key->idx;
 206                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
 207                                                 broadcast_ether_addr, idx, 1,
 208                                                 NULL, 0, key->key[idx],
 209                                                 key->len[idx])) {
 210                                 wpa_printf(MSG_WARNING, "Could not set "
 211                                            "dynamic VLAN WEP encryption.");
 212                                 errors++;
 213                         }
 214                 }
 215         }
 216
 217         return errors;
 218 }
 219
 220 /**
 221  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 222  * @hapd: Pointer to BSS data
 223  *
 224  * This function is used to free all per-BSS data structures and resources.
 225  * This gets called in a loop for each BSS between calls to
 226  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 227  * is deinitialized. Most of the modules that are initialized in
 228  * hostapd_setup_bss() are deinitialized here.
 229  */
 230 static void hostapd_cleanup(struct hostapd_data *hapd)
 231 {
 232         if (hapd->iface->ctrl_iface_deinit)
 233                 hapd->iface->ctrl_iface_deinit(hapd);
 234
 235         iapp_deinit(hapd->iapp);
 236         hapd->iapp = NULL;
 237         accounting_deinit(hapd);
 238         hostapd_deinit_wpa(hapd);
 239         vlan_deinit(hapd);
 240         hostapd_acl_deinit(hapd);
 241 #ifndef CONFIG_NO_RADIUS
 242         radius_client_deinit(hapd->radius);
 243         hapd->radius = NULL;
 244 #endif /* CONFIG_NO_RADIUS */
 245
 246         hostapd_deinit_wps(hapd);
 247
 248         authsrv_deinit(hapd);
 249
 250         if (hapd->interface_added &&
 251             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 252                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 253                            hapd->conf->iface);
 254         }
 255
 256         os_free(hapd->probereq_cb);
 257         hapd->probereq_cb = NULL;
 258
 259 #ifdef CONFIG_P2P
 260         wpabuf_free(hapd->p2p_beacon_ie);
 261         hapd->p2p_beacon_ie = NULL;
 262         wpabuf_free(hapd->p2p_probe_resp_ie);
 263         hapd->p2p_probe_resp_ie = NULL;
 264 #endif /* CONFIG_P2P */
 265
 266         wpabuf_free(hapd->time_adv);
 267 }
 268
 269
 270 /**
 271  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 272  * @iface: Pointer to interface data
 273  *
 274  * This function is called before per-BSS data structures are deinitialized
 275  * with hostapd_cleanup().
 276  */
 277 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 278 {
 279 }
 280
 281
 282 /**
 283  * hostapd_cleanup_iface - Complete per-interface cleanup
 284  * @iface: Pointer to interface data
 285  *
 286  * This function is called after per-BSS data structures are deinitialized
 287  * with hostapd_cleanup().
 288  */
 289 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 290 {
 291         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 292         iface->hw_features = NULL;
 293         os_free(iface->current_rates);
 294         iface->current_rates = NULL;
 295         ap_list_deinit(iface);
 296         hostapd_config_free(iface->conf);
 297         iface->conf = NULL;
 298
 299         os_free(iface->config_fname);
 300         os_free(iface->bss);
 301         os_free(iface);
 302 }
 303
 304
 305 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 306 {
 307         int i;
 308
 309         hostapd_broadcast_wep_set(hapd);
 310
 311         if (hapd->conf->ssid.wep.default_len) {
 312                 hostapd_set_privacy(hapd, 1);
 313                 return 0;
 314         }
 315
 316         /*
 317          * When IEEE 802.1X is not enabled, the driver may need to know how to
 318          * set authentication algorithms for static WEP.
 319          */
 320         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 321
 322         for (i = 0; i < 4; i++) {
 323                 if (hapd->conf->ssid.wep.key[i] &&
 324                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 325                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 326                                         hapd->conf->ssid.wep.key[i],
 327                                         hapd->conf->ssid.wep.len[i])) {
 328                         wpa_printf(MSG_WARNING, "Could not set WEP "
 329                                    "encryption.");
 330                         return -1;
 331                 }
 332                 if (hapd->conf->ssid.wep.key[i] &&
 333                     i == hapd->conf->ssid.wep.idx)
 334                         hostapd_set_privacy(hapd, 1);
 335         }
 336
 337         return 0;
 338 }
 339
 340
 341 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 342 {
 343         int ret = 0;
 344         u8 addr[ETH_ALEN];
 345
 346         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 347                 return 0;
 348
 349         wpa_printf(MSG_DEBUG, "Flushing old station entries");
 350         if (hostapd_flush(hapd)) {
 351                 wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
 352                 ret = -1;
 353         }
 354         wpa_printf(MSG_DEBUG, "Deauthenticate all stations");
 355         os_memset(addr, 0xff, ETH_ALEN);
 356         hostapd_drv_sta_deauth(hapd, addr, reason);
 357         hostapd_free_stas(hapd);
 358
 359         return ret;
 360 }
 361
 362
 363 /**
 364  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 365  * @iface: Pointer to interface data
 366  * Returns: 0 on success, -1 on failure
 367  *
 368  * This function is used to validate that the configured BSSIDs are valid.
 369  */
 370 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 371 {
 372         u8 mask[ETH_ALEN] = { 0 };
 373         struct hostapd_data *hapd = iface->bss[0];
 374         unsigned int i = iface->conf->num_bss, bits = 0, j;
 375         int auto_addr = 0;
 376
 377         if (hostapd_drv_none(hapd))
 378                 return 0;
 379
 380         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 381
 382         /* Determine the bits necessary to cover the number of BSSIDs. */
 383         for (i--; i; i >>= 1)
 384                 bits++;
 385
 386         /* Determine the bits necessary to any configured BSSIDs,
 387            if they are higher than the number of BSSIDs. */
 388         for (j = 0; j < iface->conf->num_bss; j++) {
 389                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 390                         if (j)
 391                                 auto_addr++;
 392                         continue;
 393                 }
 394
 395                 for (i = 0; i < ETH_ALEN; i++) {
 396                         mask[i] |=
 397                                 iface->conf->bss[j].bssid[i] ^
 398                                 hapd->own_addr[i];
 399                 }
 400         }
 401
 402         if (!auto_addr)
 403                 goto skip_mask_ext;
 404
 405         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 406                 ;
 407         j = 0;
 408         if (i < ETH_ALEN) {
 409                 j = (5 - i) * 8;
 410
 411                 while (mask[i] != 0) {
 412                         mask[i] >>= 1;
 413                         j++;
 414                 }
 415         }
 416
 417         if (bits < j)
 418                 bits = j;
 419
 420         if (bits > 40) {
 421                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 422                            bits);
 423                 return -1;
 424         }
 425
 426         os_memset(mask, 0xff, ETH_ALEN);
 427         j = bits / 8;
 428         for (i = 5; i > 5 - j; i--)
 429                 mask[i] = 0;
 430         j = bits % 8;
 431         while (j--)
 432                 mask[i] <<= 1;
 433
 434 skip_mask_ext:
 435         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 436                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 437
 438         if (!auto_addr)
 439                 return 0;
 440
 441         for (i = 0; i < ETH_ALEN; i++) {
 442                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 443                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 444                                    " for start address " MACSTR ".",
 445                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 446                         wpa_printf(MSG_ERROR, "Start address must be the "
 447                                    "first address in the block (i.e., addr "
 448                                    "AND mask == addr).");
 449                         return -1;
 450                 }
 451         }
 452
 453         return 0;
 454 }
 455
 456
 457 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 458 {
 459         size_t i;
 460
 461         for (i = 0; i < conf->num_bss; i++) {
 462                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 463                         return 1;
 464                 }
 465         }
 466
 467         return 0;
 468 }
 469
 470
 471
 472
 473 /**
 474  * hostapd_setup_bss - Per-BSS setup (initialization)
 475  * @hapd: Pointer to BSS data
 476  * @first: Whether this BSS is the first BSS of an interface
 477  *
 478  * This function is used to initialize all per-BSS data structures and
 479  * resources. This gets called in a loop for each BSS when an interface is
 480  * initialized. Most of the modules that are initialized here will be
 481  * deinitialized in hostapd_cleanup().
 482  */
 483 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 484 {
 485         struct hostapd_bss_config *conf = hapd->conf;
 486         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 487         int ssid_len, set_ssid;
 488         char force_ifname[IFNAMSIZ];
 489         u8 if_addr[ETH_ALEN];
 490
 491         if (!first) {
 492                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 493                         /* Allocate the next available BSSID. */
 494                         do {
 495                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 496                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 497                 } else {
 498                         /* Allocate the configured BSSID. */
 499                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 500
 501                         if (hostapd_mac_comp(hapd->own_addr,
 502                                              hapd->iface->bss[0]->own_addr) ==
 503                             0) {
 504                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 505                                            "BSSID set to the MAC address of "
 506                                            "the radio", hapd->conf->iface);
 507                                 return -1;
 508                         }
 509                 }
 510
 511                 hapd->interface_added = 1;
 512                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 513                                    hapd->conf->iface, hapd->own_addr, hapd,
 514                                    &hapd->drv_priv, force_ifname, if_addr,
 515                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 516                                    NULL)) {
 517                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 518                                    MACSTR ")", MAC2STR(hapd->own_addr));
 519                         return -1;
 520                 }
 521         }
 522
 523         if (conf->wmm_enabled < 0)
 524                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 525
 526         hostapd_flush_old_stations(hapd, WLAN_REASON_PREV_AUTH_NOT_VALID);
 527         hostapd_set_privacy(hapd, 0);
 528
 529         hostapd_broadcast_wep_clear(hapd);
 530         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 531                 return -1;
 532
 533         /*
 534          * Fetch the SSID from the system and use it or,
 535          * if one was specified in the config file, verify they
 536          * match.
 537          */
 538         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 539         if (ssid_len < 0) {
 540                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 541                 return -1;
 542         }
 543         if (conf->ssid.ssid_set) {
 544                 /*
 545                  * If SSID is specified in the config file and it differs
 546                  * from what is being used then force installation of the
 547                  * new SSID.
 548                  */
 549                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 550                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 551         } else {
 552                 /*
 553                  * No SSID in the config file; just use the one we got
 554                  * from the system.
 555                  */
 556                 set_ssid = 0;
 557                 conf->ssid.ssid_len = ssid_len;
 558                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 559                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 560         }
 561
 562         if (!hostapd_drv_none(hapd)) {
 563                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 564                            " and ssid '%s'",
 565                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 566                            hapd->conf->ssid.ssid);
 567         }
 568
 569         if (hostapd_setup_wpa_psk(conf)) {
 570                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 571                 return -1;
 572         }
 573
 574         /* Set SSID for the kernel driver (to be used in beacon and probe
 575          * response frames) */
 576         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 577                                          conf->ssid.ssid_len)) {
 578                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 579                 return -1;
 580         }
 581
 582         if (wpa_debug_level == MSG_MSGDUMP)
 583                 conf->radius->msg_dumps = 1;
 584 #ifndef CONFIG_NO_RADIUS
 585         hapd->radius = radius_client_init(hapd, conf->radius);
 586         if (hapd->radius == NULL) {
 587                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 588                 return -1;
 589         }
 590 #endif /* CONFIG_NO_RADIUS */
 591
 592         if (hostapd_acl_init(hapd)) {
 593                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 594                 return -1;
 595         }
 596         if (hostapd_init_wps(hapd, conf))
 597                 return -1;
 598
 599         if (authsrv_init(hapd) < 0)
 600                 return -1;
 601
 602         if (ieee802_1x_init(hapd)) {
 603                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 604                 return -1;
 605         }
 606
 607         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 608                 return -1;
 609
 610         if (accounting_init(hapd)) {
 611                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 612                 return -1;
 613         }
 614
 615         if (hapd->conf->ieee802_11f &&
 616             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 617                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 618                            "failed.");
 619                 return -1;
 620         }
 621
 622         if (hapd->iface->ctrl_iface_init &&
 623             hapd->iface->ctrl_iface_init(hapd)) {
 624                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 625                 return -1;
 626         }
 627
 628         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 629                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 630                 return -1;
 631         }
 632
 633         ieee802_11_set_beacon(hapd);
 634
 635         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 636                 return -1;
 637
 638         if (hapd->driver && hapd->driver->set_operstate)
 639                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 640
 641         return 0;
 642 }
 643
 644
 645 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 646 {
 647         struct hostapd_data *hapd = iface->bss[0];
 648         int i;
 649         struct hostapd_tx_queue_params *p;
 650
 651         for (i = 0; i < NUM_TX_QUEUES; i++) {
 652                 p = &iface->conf->tx_queue[i];
 653
 654                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 655                                                 p->cwmax, p->burst)) {
 656                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 657                                    "parameters for queue %d.", i);
 658                         /* Continue anyway */
 659                 }
 660         }
 661 }
 662
 663
 664 static int setup_interface(struct hostapd_iface *iface)
 665 {
 666         struct hostapd_data *hapd = iface->bss[0];
 667         size_t i;
 668         char country[4];
 669
 670         /*
 671          * Make sure that all BSSes get configured with a pointer to the same
 672          * driver interface.
 673          */
 674         for (i = 1; i < iface->num_bss; i++) {
 675                 iface->bss[i]->driver = hapd->driver;
 676                 iface->bss[i]->drv_priv = hapd->drv_priv;
 677         }
 678
 679         if (hostapd_validate_bssid_configuration(iface))
 680                 return -1;
 681
 682         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 683                 os_memcpy(country, hapd->iconf->country, 3);
 684                 country[3] = '\0';
 685                 if (hostapd_set_country(hapd, country) < 0) {
 686                         wpa_printf(MSG_ERROR, "Failed to set country code");
 687                         return -1;
 688                 }
 689         }
 690
 691         if (hostapd_get_hw_features(iface)) {
 692                 /* Not all drivers support this yet, so continue without hw
 693                  * feature data. */
 694         } else {
 695                 int ret = hostapd_select_hw_mode(iface);
 696                 if (ret < 0) {
 697                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 698                                    "channel. (%d)", ret);
 699                         return -1;
 700                 }
 701                 ret = hostapd_check_ht_capab(iface);
 702                 if (ret < 0)
 703                         return -1;
 704                 if (ret == 1) {
 705                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 706                                    "be completed in a callback");
 707                         return 0;
 708                 }
 709         }
 710         return hostapd_setup_interface_complete(iface, 0);
 711 }
 712
 713
 714 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 715 {
 716         struct hostapd_data *hapd = iface->bss[0];
 717         size_t j;
 718         u8 *prev_addr;
 719
 720         if (err) {
 721                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 722                 eloop_terminate();
 723                 return -1;
 724         }
 725
 726         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 727         if (hapd->iconf->channel) {
 728                 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 729                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 730                            "Frequency: %d MHz",
 731                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 732                            hapd->iconf->channel, iface->freq);
 733
 734                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 735                                      hapd->iconf->channel,
 736                                      hapd->iconf->ieee80211n,
 737                                      hapd->iconf->secondary_channel)) {
 738                         wpa_printf(MSG_ERROR, "Could not set channel for "
 739                                    "kernel driver");
 740                         return -1;
 741                 }
 742         }
 743
 744         if (iface->current_mode) {
 745                 if (hostapd_prepare_rates(hapd, iface->current_mode)) {
 746                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
 747                                    "table.");
 748                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 749                                        HOSTAPD_LEVEL_WARNING,
 750                                        "Failed to prepare rates table.");
 751                         return -1;
 752                 }
 753         }
 754
 755         if (hapd->iconf->rts_threshold > -1 &&
 756             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 757                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 758                            "kernel driver");
 759                 return -1;
 760         }
 761
 762         if (hapd->iconf->fragm_threshold > -1 &&
 763             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 764                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 765                            "for kernel driver");
 766                 return -1;
 767         }
 768
 769         prev_addr = hapd->own_addr;
 770
 771         for (j = 0; j < iface->num_bss; j++) {
 772                 hapd = iface->bss[j];
 773                 if (j)
 774                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 775                 if (hostapd_setup_bss(hapd, j == 0))
 776                         return -1;
 777                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 778                         prev_addr = hapd->own_addr;
 779         }
 780
 781         hostapd_tx_queue_params(iface);
 782
 783         ap_list_init(iface);
 784
 785         if (hostapd_driver_commit(hapd) < 0) {
 786                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 787                            "configuration", __func__);
 788                 return -1;
 789         }
 790
 791         /*
 792          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
 793          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
 794          * mode), the interface is up only after driver_commit, so initialize
 795          * WPS after driver_commit.
 796          */
 797         for (j = 0; j < iface->num_bss; j++) {
 798                 if (hostapd_init_wps_complete(iface->bss[j]))
 799                         return -1;
 800         }
 801
 802         if (hapd->setup_complete_cb)
 803                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
 804
 805         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 806                    iface->bss[0]->conf->iface);
 807
 808         return 0;
 809 }
 810
 811
 812 /**
 813  * hostapd_setup_interface - Setup of an interface
 814  * @iface: Pointer to interface data.
 815  * Returns: 0 on success, -1 on failure
 816  *
 817  * Initializes the driver interface, validates the configuration,
 818  * and sets driver parameters based on the configuration.
 819  * Flushes old stations, sets the channel, encryption,
 820  * beacons, and WDS links based on the configuration.
 821  */
 822 int hostapd_setup_interface(struct hostapd_iface *iface)
 823 {
 824         int ret;
 825
 826         ret = setup_interface(iface);
 827         if (ret) {
 828                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 829                            iface->bss[0]->conf->iface);
 830                 return -1;
 831         }
 832
 833         return 0;
 834 }
 835
 836
 837 /**
 838  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 839  * @hapd_iface: Pointer to interface data
 840  * @conf: Pointer to per-interface configuration
 841  * @bss: Pointer to per-BSS configuration for this BSS
 842  * Returns: Pointer to allocated BSS data
 843  *
 844  * This function is used to allocate per-BSS data structure. This data will be
 845  * freed after hostapd_cleanup() is called for it during interface
 846  * deinitialization.
 847  */
 848 struct hostapd_data *
 849 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 850                        struct hostapd_config *conf,
 851                        struct hostapd_bss_config *bss)
 852 {
 853         struct hostapd_data *hapd;
 854
 855         hapd = os_zalloc(sizeof(*hapd));
 856         if (hapd == NULL)
 857                 return NULL;
 858
 859         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 860         hapd->iconf = conf;
 861         hapd->conf = bss;
 862         hapd->iface = hapd_iface;
 863         hapd->driver = hapd->iconf->driver;
 864
 865         return hapd;
 866 }
 867
 868
 869 void hostapd_interface_deinit(struct hostapd_iface *iface)
 870 {
 871         size_t j;
 872
 873         if (iface == NULL)
 874                 return;
 875
 876         hostapd_cleanup_iface_pre(iface);
 877         for (j = 0; j < iface->num_bss; j++) {
 878                 struct hostapd_data *hapd = iface->bss[j];
 879                 hostapd_free_stas(hapd);
 880                 hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
 881                 hostapd_cleanup(hapd);
 882         }
 883 }
 884
 885
 886 void hostapd_interface_free(struct hostapd_iface *iface)
 887 {
 888         size_t j;
 889         for (j = 0; j < iface->num_bss; j++)
 890                 os_free(iface->bss[j]);
 891         hostapd_cleanup_iface(iface);
 892 }
 893
 894
 895 /**
 896  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 897  * @hapd: Pointer to BSS data
 898  * @sta: Pointer to the associated STA data
 899  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 900  *
 901  * This function will be called whenever a station associates with the AP. It
 902  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 903  * from drv_callbacks.c based on driver events for drivers that take care of
 904  * management frames (IEEE 802.11 authentication and association) internally.
 905  */
 906 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 907                            int reassoc)
 908 {
 909         if (hapd->tkip_countermeasures) {
 910                 hostapd_drv_sta_deauth(hapd, sta->addr,
 911                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
 912                 return;
 913         }
 914
 915         hostapd_prune_associations(hapd, sta->addr);
 916
 917         /* IEEE 802.11F (IAPP) */
 918         if (hapd->conf->ieee802_11f)
 919                 iapp_new_station(hapd->iapp, sta);
 920
 921 #ifdef CONFIG_P2P
 922         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
 923                 sta->no_p2p_set = 1;
 924                 hapd->num_sta_no_p2p++;
 925                 if (hapd->num_sta_no_p2p == 1)
 926                         hostapd_p2p_non_p2p_sta_connected(hapd);
 927         }
 928 #endif /* CONFIG_P2P */
 929
 930         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 931          * IEEE 802.1X/WPA code will start accounting after the station has
 932          * been authorized. */
 933         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 934                 accounting_sta_start(hapd, sta);
 935
 936         /* Start IEEE 802.1X authentication process for new stations */
 937         ieee802_1x_new_station(hapd, sta);
 938         if (reassoc) {
 939                 if (sta->auth_alg != WLAN_AUTH_FT &&
 940                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 941                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 942         } else
 943                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 944 }