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 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 232 {
 233         iapp_deinit(hapd->iapp);
 234         hapd->iapp = NULL;
 235         accounting_deinit(hapd);
 236         hostapd_deinit_wpa(hapd);
 237         vlan_deinit(hapd);
 238         hostapd_acl_deinit(hapd);
 239 #ifndef CONFIG_NO_RADIUS
 240         radius_client_deinit(hapd->radius);
 241         hapd->radius = NULL;
 242 #endif /* CONFIG_NO_RADIUS */
 243
 244         hostapd_deinit_wps(hapd);
 245
 246         authsrv_deinit(hapd);
 247
 248         if (hapd->interface_added &&
 249             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 250                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 251                            hapd->conf->iface);
 252         }
 253
 254         os_free(hapd->probereq_cb);
 255         hapd->probereq_cb = NULL;
 256
 257 #ifdef CONFIG_P2P
 258         wpabuf_free(hapd->p2p_beacon_ie);
 259         hapd->p2p_beacon_ie = NULL;
 260         wpabuf_free(hapd->p2p_probe_resp_ie);
 261         hapd->p2p_probe_resp_ie = NULL;
 262 #endif /* CONFIG_P2P */
 263
 264         wpabuf_free(hapd->time_adv);
 265 }
 266
 267
 268 /**
 269  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 270  * @hapd: Pointer to BSS data
 271  *
 272  * This function is used to free all per-BSS data structures and resources.
 273  * This gets called in a loop for each BSS between calls to
 274  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 275  * is deinitialized. Most of the modules that are initialized in
 276  * hostapd_setup_bss() are deinitialized here.
 277  */
 278 static void hostapd_cleanup(struct hostapd_data *hapd)
 279 {
 280         if (hapd->iface->ctrl_iface_deinit)
 281                 hapd->iface->ctrl_iface_deinit(hapd);
 282         hostapd_free_hapd_data(hapd);
 283 }
 284
 285
 286 /**
 287  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 288  * @iface: Pointer to interface data
 289  *
 290  * This function is called before per-BSS data structures are deinitialized
 291  * with hostapd_cleanup().
 292  */
 293 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 294 {
 295 }
 296
 297
 298 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 299 {
 300         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 301         iface->hw_features = NULL;
 302         os_free(iface->current_rates);
 303         iface->current_rates = NULL;
 304         os_free(iface->basic_rates);
 305         iface->basic_rates = NULL;
 306         ap_list_deinit(iface);
 307 }
 308
 309
 310 /**
 311  * hostapd_cleanup_iface - Complete per-interface cleanup
 312  * @iface: Pointer to interface data
 313  *
 314  * This function is called after per-BSS data structures are deinitialized
 315  * with hostapd_cleanup().
 316  */
 317 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 318 {
 319         hostapd_cleanup_iface_partial(iface);
 320         hostapd_config_free(iface->conf);
 321         iface->conf = NULL;
 322
 323         os_free(iface->config_fname);
 324         os_free(iface->bss);
 325         os_free(iface);
 326 }
 327
 328
 329 static void hostapd_clear_wep(struct hostapd_data *hapd)
 330 {
 331         if (hapd->drv_priv) {
 332                 hostapd_set_privacy(hapd, 0);
 333                 hostapd_broadcast_wep_clear(hapd);
 334         }
 335 }
 336
 337
 338 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 339 {
 340         int i;
 341
 342         hostapd_broadcast_wep_set(hapd);
 343
 344         if (hapd->conf->ssid.wep.default_len) {
 345                 hostapd_set_privacy(hapd, 1);
 346                 return 0;
 347         }
 348
 349         /*
 350          * When IEEE 802.1X is not enabled, the driver may need to know how to
 351          * set authentication algorithms for static WEP.
 352          */
 353         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 354
 355         for (i = 0; i < 4; i++) {
 356                 if (hapd->conf->ssid.wep.key[i] &&
 357                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 358                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 359                                         hapd->conf->ssid.wep.key[i],
 360                                         hapd->conf->ssid.wep.len[i])) {
 361                         wpa_printf(MSG_WARNING, "Could not set WEP "
 362                                    "encryption.");
 363                         return -1;
 364                 }
 365                 if (hapd->conf->ssid.wep.key[i] &&
 366                     i == hapd->conf->ssid.wep.idx)
 367                         hostapd_set_privacy(hapd, 1);
 368         }
 369
 370         return 0;
 371 }
 372
 373
 374 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 375 {
 376         int ret = 0;
 377         u8 addr[ETH_ALEN];
 378
 379         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 380                 return 0;
 381
 382         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Flushing old station entries");
 383         if (hostapd_flush(hapd)) {
 384                 wpa_msg(hapd->msg_ctx, MSG_WARNING, "Could not connect to "
 385                         "kernel driver");
 386                 ret = -1;
 387         }
 388         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 389         os_memset(addr, 0xff, ETH_ALEN);
 390         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 391         hostapd_free_stas(hapd);
 392
 393         return ret;
 394 }
 395
 396
 397 /**
 398  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 399  * @iface: Pointer to interface data
 400  * Returns: 0 on success, -1 on failure
 401  *
 402  * This function is used to validate that the configured BSSIDs are valid.
 403  */
 404 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 405 {
 406         u8 mask[ETH_ALEN] = { 0 };
 407         struct hostapd_data *hapd = iface->bss[0];
 408         unsigned int i = iface->conf->num_bss, bits = 0, j;
 409         int auto_addr = 0;
 410
 411         if (hostapd_drv_none(hapd))
 412                 return 0;
 413
 414         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 415
 416         /* Determine the bits necessary to cover the number of BSSIDs. */
 417         for (i--; i; i >>= 1)
 418                 bits++;
 419
 420         /* Determine the bits necessary to any configured BSSIDs,
 421            if they are higher than the number of BSSIDs. */
 422         for (j = 0; j < iface->conf->num_bss; j++) {
 423                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 424                         if (j)
 425                                 auto_addr++;
 426                         continue;
 427                 }
 428
 429                 for (i = 0; i < ETH_ALEN; i++) {
 430                         mask[i] |=
 431                                 iface->conf->bss[j].bssid[i] ^
 432                                 hapd->own_addr[i];
 433                 }
 434         }
 435
 436         if (!auto_addr)
 437                 goto skip_mask_ext;
 438
 439         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 440                 ;
 441         j = 0;
 442         if (i < ETH_ALEN) {
 443                 j = (5 - i) * 8;
 444
 445                 while (mask[i] != 0) {
 446                         mask[i] >>= 1;
 447                         j++;
 448                 }
 449         }
 450
 451         if (bits < j)
 452                 bits = j;
 453
 454         if (bits > 40) {
 455                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 456                            bits);
 457                 return -1;
 458         }
 459
 460         os_memset(mask, 0xff, ETH_ALEN);
 461         j = bits / 8;
 462         for (i = 5; i > 5 - j; i--)
 463                 mask[i] = 0;
 464         j = bits % 8;
 465         while (j--)
 466                 mask[i] <<= 1;
 467
 468 skip_mask_ext:
 469         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 470                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 471
 472         if (!auto_addr)
 473                 return 0;
 474
 475         for (i = 0; i < ETH_ALEN; i++) {
 476                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 477                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 478                                    " for start address " MACSTR ".",
 479                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 480                         wpa_printf(MSG_ERROR, "Start address must be the "
 481                                    "first address in the block (i.e., addr "
 482                                    "AND mask == addr).");
 483                         return -1;
 484                 }
 485         }
 486
 487         return 0;
 488 }
 489
 490
 491 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 492 {
 493         size_t i;
 494
 495         for (i = 0; i < conf->num_bss; i++) {
 496                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 497                         return 1;
 498                 }
 499         }
 500
 501         return 0;
 502 }
 503
 504
 505
 506
 507 /**
 508  * hostapd_setup_bss - Per-BSS setup (initialization)
 509  * @hapd: Pointer to BSS data
 510  * @first: Whether this BSS is the first BSS of an interface
 511  *
 512  * This function is used to initialize all per-BSS data structures and
 513  * resources. This gets called in a loop for each BSS when an interface is
 514  * initialized. Most of the modules that are initialized here will be
 515  * deinitialized in hostapd_cleanup().
 516  */
 517 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 518 {
 519         struct hostapd_bss_config *conf = hapd->conf;
 520         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 521         int ssid_len, set_ssid;
 522         char force_ifname[IFNAMSIZ];
 523         u8 if_addr[ETH_ALEN];
 524
 525         if (!first) {
 526                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 527                         /* Allocate the next available BSSID. */
 528                         do {
 529                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 530                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 531                 } else {
 532                         /* Allocate the configured BSSID. */
 533                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 534
 535                         if (hostapd_mac_comp(hapd->own_addr,
 536                                              hapd->iface->bss[0]->own_addr) ==
 537                             0) {
 538                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 539                                            "BSSID set to the MAC address of "
 540                                            "the radio", hapd->conf->iface);
 541                                 return -1;
 542                         }
 543                 }
 544
 545                 hapd->interface_added = 1;
 546                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 547                                    hapd->conf->iface, hapd->own_addr, hapd,
 548                                    &hapd->drv_priv, force_ifname, if_addr,
 549                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 550                                    NULL)) {
 551                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 552                                    MACSTR ")", MAC2STR(hapd->own_addr));
 553                         return -1;
 554                 }
 555         }
 556
 557         if (conf->wmm_enabled < 0)
 558                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 559
 560         hostapd_flush_old_stations(hapd);
 561         hostapd_set_privacy(hapd, 0);
 562
 563         hostapd_broadcast_wep_clear(hapd);
 564         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 565                 return -1;
 566
 567         /*
 568          * Fetch the SSID from the system and use it or,
 569          * if one was specified in the config file, verify they
 570          * match.
 571          */
 572         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 573         if (ssid_len < 0) {
 574                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 575                 return -1;
 576         }
 577         if (conf->ssid.ssid_set) {
 578                 /*
 579                  * If SSID is specified in the config file and it differs
 580                  * from what is being used then force installation of the
 581                  * new SSID.
 582                  */
 583                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 584                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 585         } else {
 586                 /*
 587                  * No SSID in the config file; just use the one we got
 588                  * from the system.
 589                  */
 590                 set_ssid = 0;
 591                 conf->ssid.ssid_len = ssid_len;
 592                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 593                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 594         }
 595
 596         if (!hostapd_drv_none(hapd)) {
 597                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 598                            " and ssid '%s'",
 599                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 600                            hapd->conf->ssid.ssid);
 601         }
 602
 603         if (hostapd_setup_wpa_psk(conf)) {
 604                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 605                 return -1;
 606         }
 607
 608         /* Set SSID for the kernel driver (to be used in beacon and probe
 609          * response frames) */
 610         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 611                                          conf->ssid.ssid_len)) {
 612                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 613                 return -1;
 614         }
 615
 616         if (wpa_debug_level == MSG_MSGDUMP)
 617                 conf->radius->msg_dumps = 1;
 618 #ifndef CONFIG_NO_RADIUS
 619         hapd->radius = radius_client_init(hapd, conf->radius);
 620         if (hapd->radius == NULL) {
 621                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 622                 return -1;
 623         }
 624 #endif /* CONFIG_NO_RADIUS */
 625
 626         if (hostapd_acl_init(hapd)) {
 627                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 628                 return -1;
 629         }
 630         if (hostapd_init_wps(hapd, conf))
 631                 return -1;
 632
 633         if (authsrv_init(hapd) < 0)
 634                 return -1;
 635
 636         if (ieee802_1x_init(hapd)) {
 637                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 638                 return -1;
 639         }
 640
 641         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 642                 return -1;
 643
 644         if (accounting_init(hapd)) {
 645                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 646                 return -1;
 647         }
 648
 649         if (hapd->conf->ieee802_11f &&
 650             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 651                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 652                            "failed.");
 653                 return -1;
 654         }
 655
 656         if (hapd->iface->ctrl_iface_init &&
 657             hapd->iface->ctrl_iface_init(hapd)) {
 658                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 659                 return -1;
 660         }
 661
 662         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 663                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 664                 return -1;
 665         }
 666
 667         ieee802_11_set_beacon(hapd);
 668
 669         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 670                 return -1;
 671
 672         if (hapd->driver && hapd->driver->set_operstate)
 673                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 674
 675         return 0;
 676 }
 677
 678
 679 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 680 {
 681         struct hostapd_data *hapd = iface->bss[0];
 682         int i;
 683         struct hostapd_tx_queue_params *p;
 684
 685         for (i = 0; i < NUM_TX_QUEUES; i++) {
 686                 p = &iface->conf->tx_queue[i];
 687
 688                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 689                                                 p->cwmax, p->burst)) {
 690                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 691                                    "parameters for queue %d.", i);
 692                         /* Continue anyway */
 693                 }
 694         }
 695 }
 696
 697
 698 static int setup_interface(struct hostapd_iface *iface)
 699 {
 700         struct hostapd_data *hapd = iface->bss[0];
 701         size_t i;
 702         char country[4];
 703
 704         /*
 705          * Make sure that all BSSes get configured with a pointer to the same
 706          * driver interface.
 707          */
 708         for (i = 1; i < iface->num_bss; i++) {
 709                 iface->bss[i]->driver = hapd->driver;
 710                 iface->bss[i]->drv_priv = hapd->drv_priv;
 711         }
 712
 713         if (hostapd_validate_bssid_configuration(iface))
 714                 return -1;
 715
 716         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 717                 os_memcpy(country, hapd->iconf->country, 3);
 718                 country[3] = '\0';
 719                 if (hostapd_set_country(hapd, country) < 0) {
 720                         wpa_printf(MSG_ERROR, "Failed to set country code");
 721                         return -1;
 722                 }
 723         }
 724
 725         if (hostapd_get_hw_features(iface)) {
 726                 /* Not all drivers support this yet, so continue without hw
 727                  * feature data. */
 728         } else {
 729                 int ret = hostapd_select_hw_mode(iface);
 730                 if (ret < 0) {
 731                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 732                                    "channel. (%d)", ret);
 733                         return -1;
 734                 }
 735                 ret = hostapd_check_ht_capab(iface);
 736                 if (ret < 0)
 737                         return -1;
 738                 if (ret == 1) {
 739                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 740                                    "be completed in a callback");
 741                         return 0;
 742                 }
 743         }
 744         return hostapd_setup_interface_complete(iface, 0);
 745 }
 746
 747
 748 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 749 {
 750         struct hostapd_data *hapd = iface->bss[0];
 751         size_t j;
 752         u8 *prev_addr;
 753
 754         if (err) {
 755                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 756                 eloop_terminate();
 757                 return -1;
 758         }
 759
 760         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 761         if (hapd->iconf->channel) {
 762                 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 763                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 764                            "Frequency: %d MHz",
 765                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 766                            hapd->iconf->channel, iface->freq);
 767
 768                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 769                                      hapd->iconf->channel,
 770                                      hapd->iconf->ieee80211n,
 771                                      hapd->iconf->secondary_channel)) {
 772                         wpa_printf(MSG_ERROR, "Could not set channel for "
 773                                    "kernel driver");
 774                         return -1;
 775                 }
 776         }
 777
 778         if (iface->current_mode) {
 779                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
 780                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
 781                                    "table.");
 782                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 783                                        HOSTAPD_LEVEL_WARNING,
 784                                        "Failed to prepare rates table.");
 785                         return -1;
 786                 }
 787         }
 788
 789         if (hapd->iconf->rts_threshold > -1 &&
 790             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 791                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 792                            "kernel driver");
 793                 return -1;
 794         }
 795
 796         if (hapd->iconf->fragm_threshold > -1 &&
 797             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 798                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 799                            "for kernel driver");
 800                 return -1;
 801         }
 802
 803         prev_addr = hapd->own_addr;
 804
 805         for (j = 0; j < iface->num_bss; j++) {
 806                 hapd = iface->bss[j];
 807                 if (j)
 808                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 809                 if (hostapd_setup_bss(hapd, j == 0))
 810                         return -1;
 811                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 812                         prev_addr = hapd->own_addr;
 813         }
 814
 815         hostapd_tx_queue_params(iface);
 816
 817         ap_list_init(iface);
 818
 819         if (hostapd_driver_commit(hapd) < 0) {
 820                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 821                            "configuration", __func__);
 822                 return -1;
 823         }
 824
 825         /*
 826          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
 827          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
 828          * mode), the interface is up only after driver_commit, so initialize
 829          * WPS after driver_commit.
 830          */
 831         for (j = 0; j < iface->num_bss; j++) {
 832                 if (hostapd_init_wps_complete(iface->bss[j]))
 833                         return -1;
 834         }
 835
 836         if (hapd->setup_complete_cb)
 837                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
 838
 839         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 840                    iface->bss[0]->conf->iface);
 841
 842         return 0;
 843 }
 844
 845
 846 /**
 847  * hostapd_setup_interface - Setup of an interface
 848  * @iface: Pointer to interface data.
 849  * Returns: 0 on success, -1 on failure
 850  *
 851  * Initializes the driver interface, validates the configuration,
 852  * and sets driver parameters based on the configuration.
 853  * Flushes old stations, sets the channel, encryption,
 854  * beacons, and WDS links based on the configuration.
 855  */
 856 int hostapd_setup_interface(struct hostapd_iface *iface)
 857 {
 858         int ret;
 859
 860         ret = setup_interface(iface);
 861         if (ret) {
 862                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 863                            iface->bss[0]->conf->iface);
 864                 return -1;
 865         }
 866
 867         return 0;
 868 }
 869
 870
 871 /**
 872  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 873  * @hapd_iface: Pointer to interface data
 874  * @conf: Pointer to per-interface configuration
 875  * @bss: Pointer to per-BSS configuration for this BSS
 876  * Returns: Pointer to allocated BSS data
 877  *
 878  * This function is used to allocate per-BSS data structure. This data will be
 879  * freed after hostapd_cleanup() is called for it during interface
 880  * deinitialization.
 881  */
 882 struct hostapd_data *
 883 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 884                        struct hostapd_config *conf,
 885                        struct hostapd_bss_config *bss)
 886 {
 887         struct hostapd_data *hapd;
 888
 889         hapd = os_zalloc(sizeof(*hapd));
 890         if (hapd == NULL)
 891                 return NULL;
 892
 893         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 894         hapd->iconf = conf;
 895         hapd->conf = bss;
 896         hapd->iface = hapd_iface;
 897         hapd->driver = hapd->iconf->driver;
 898         hapd->ctrl_sock = -1;
 899
 900         return hapd;
 901 }
 902
 903
 904 void hostapd_interface_deinit(struct hostapd_iface *iface)
 905 {
 906         size_t j;
 907
 908         if (iface == NULL)
 909                 return;
 910
 911         hostapd_cleanup_iface_pre(iface);
 912         for (j = 0; j < iface->num_bss; j++) {
 913                 struct hostapd_data *hapd = iface->bss[j];
 914                 hostapd_free_stas(hapd);
 915                 hostapd_flush_old_stations(hapd);
 916                 hostapd_clear_wep(hapd);
 917                 hostapd_cleanup(hapd);
 918         }
 919 }
 920
 921
 922 void hostapd_interface_free(struct hostapd_iface *iface)
 923 {
 924         size_t j;
 925         for (j = 0; j < iface->num_bss; j++)
 926                 os_free(iface->bss[j]);
 927         hostapd_cleanup_iface(iface);
 928 }
 929
 930
 931 /**
 932  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 933  * @hapd: Pointer to BSS data
 934  * @sta: Pointer to the associated STA data
 935  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 936  *
 937  * This function will be called whenever a station associates with the AP. It
 938  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 939  * from drv_callbacks.c based on driver events for drivers that take care of
 940  * management frames (IEEE 802.11 authentication and association) internally.
 941  */
 942 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 943                            int reassoc)
 944 {
 945         if (hapd->tkip_countermeasures) {
 946                 hostapd_drv_sta_deauth(hapd, sta->addr,
 947                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
 948                 return;
 949         }
 950
 951         hostapd_prune_associations(hapd, sta->addr);
 952
 953         /* IEEE 802.11F (IAPP) */
 954         if (hapd->conf->ieee802_11f)
 955                 iapp_new_station(hapd->iapp, sta);
 956
 957 #ifdef CONFIG_P2P
 958         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
 959                 sta->no_p2p_set = 1;
 960                 hapd->num_sta_no_p2p++;
 961                 if (hapd->num_sta_no_p2p == 1)
 962                         hostapd_p2p_non_p2p_sta_connected(hapd);
 963         }
 964 #endif /* CONFIG_P2P */
 965
 966         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 967          * IEEE 802.1X/WPA code will start accounting after the station has
 968          * been authorized. */
 969         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 970                 accounting_sta_start(hapd, sta);
 971
 972         /* Start IEEE 802.1X authentication process for new stations */
 973         ieee802_1x_new_station(hapd, sta);
 974         if (reassoc) {
 975                 if (sta->auth_alg != WLAN_AUTH_FT &&
 976                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 977                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 978         } else
 979                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 980 }