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 #include "gas_serv.h"
  34
  35
  36 static int hostapd_flush_old_stations(struct hostapd_data *hapd);
  37 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  38 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  39
  40 extern int wpa_debug_level;
  41
  42
  43 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  44                                int (*cb)(struct hostapd_iface *iface,
  45                                          void *ctx), void *ctx)
  46 {
  47         size_t i;
  48         int ret;
  49
  50         for (i = 0; i < interfaces->count; i++) {
  51                 ret = cb(interfaces->iface[i], ctx);
  52                 if (ret)
  53                         return ret;
  54         }
  55
  56         return 0;
  57 }
  58
  59
  60 static void hostapd_reload_bss(struct hostapd_data *hapd)
  61 {
  62 #ifndef CONFIG_NO_RADIUS
  63         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  64 #endif /* CONFIG_NO_RADIUS */
  65
  66         if (hostapd_setup_wpa_psk(hapd->conf)) {
  67                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  68                            "after reloading configuration");
  69         }
  70
  71         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  72                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  73         else
  74                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  75
  76         if (hapd->conf->wpa && hapd->wpa_auth == NULL) {
  77                 hostapd_setup_wpa(hapd);
  78                 if (hapd->wpa_auth)
  79                         wpa_init_keys(hapd->wpa_auth);
  80         } else if (hapd->conf->wpa) {
  81                 const u8 *wpa_ie;
  82                 size_t wpa_ie_len;
  83                 hostapd_reconfig_wpa(hapd);
  84                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
  85                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
  86                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
  87                                    "the kernel driver.");
  88         } else if (hapd->wpa_auth) {
  89                 wpa_deinit(hapd->wpa_auth);
  90                 hapd->wpa_auth = NULL;
  91                 hostapd_set_privacy(hapd, 0);
  92                 hostapd_setup_encryption(hapd->conf->iface, hapd);
  93                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
  94         }
  95
  96         ieee802_11_set_beacon(hapd);
  97         hostapd_update_wps(hapd);
  98
  99         if (hapd->conf->ssid.ssid_set &&
 100             hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
 101                              hapd->conf->ssid.ssid_len)) {
 102                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 103                 /* try to continue */
 104         }
 105         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 106 }
 107
 108
 109 int hostapd_reload_config(struct hostapd_iface *iface)
 110 {
 111         struct hostapd_data *hapd = iface->bss[0];
 112         struct hostapd_config *newconf, *oldconf;
 113         size_t j;
 114
 115         if (iface->config_read_cb == NULL)
 116                 return -1;
 117         newconf = iface->config_read_cb(iface->config_fname);
 118         if (newconf == NULL)
 119                 return -1;
 120
 121         /*
 122          * Deauthenticate all stations since the new configuration may not
 123          * allow them to use the BSS anymore.
 124          */
 125         for (j = 0; j < iface->num_bss; j++) {
 126                 hostapd_flush_old_stations(iface->bss[j]);
 127                 hostapd_broadcast_wep_clear(iface->bss[j]);
 128
 129 #ifndef CONFIG_NO_RADIUS
 130                 /* TODO: update dynamic data based on changed configuration
 131                  * items (e.g., open/close sockets, etc.) */
 132                 radius_client_flush(iface->bss[j]->radius, 0);
 133 #endif /* CONFIG_NO_RADIUS */
 134         }
 135
 136         oldconf = hapd->iconf;
 137         iface->conf = newconf;
 138
 139         for (j = 0; j < iface->num_bss; j++) {
 140                 hapd = iface->bss[j];
 141                 hapd->iconf = newconf;
 142                 hapd->conf = &newconf->bss[j];
 143                 hostapd_reload_bss(hapd);
 144         }
 145
 146         hostapd_config_free(oldconf);
 147
 148
 149         return 0;
 150 }
 151
 152
 153 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 154                                               char *ifname)
 155 {
 156         int i;
 157
 158         for (i = 0; i < NUM_WEP_KEYS; i++) {
 159                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 160                                         0, NULL, 0, NULL, 0)) {
 161                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 162                                    "encryption keys (ifname=%s keyidx=%d)",
 163                                    ifname, i);
 164                 }
 165         }
 166 #ifdef CONFIG_IEEE80211W
 167         if (hapd->conf->ieee80211w) {
 168                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 169                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 170                                                 NULL, i, 0, NULL,
 171                                                 0, NULL, 0)) {
 172                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 173                                            "default mgmt encryption keys "
 174                                            "(ifname=%s keyidx=%d)", ifname, i);
 175                         }
 176                 }
 177         }
 178 #endif /* CONFIG_IEEE80211W */
 179 }
 180
 181
 182 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 183 {
 184         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 185         return 0;
 186 }
 187
 188
 189 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 190 {
 191         int errors = 0, idx;
 192         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 193
 194         idx = ssid->wep.idx;
 195         if (ssid->wep.default_len &&
 196             hostapd_drv_set_key(hapd->conf->iface,
 197                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 198                                 1, NULL, 0, ssid->wep.key[idx],
 199                                 ssid->wep.len[idx])) {
 200                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 201                 errors++;
 202         }
 203
 204         if (ssid->dyn_vlan_keys) {
 205                 size_t i;
 206                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 207                         const char *ifname;
 208                         struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
 209                         if (key == NULL)
 210                                 continue;
 211                         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 212                                                             i);
 213                         if (ifname == NULL)
 214                                 continue;
 215
 216                         idx = key->idx;
 217                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
 218                                                 broadcast_ether_addr, idx, 1,
 219                                                 NULL, 0, key->key[idx],
 220                                                 key->len[idx])) {
 221                                 wpa_printf(MSG_WARNING, "Could not set "
 222                                            "dynamic VLAN WEP encryption.");
 223                                 errors++;
 224                         }
 225                 }
 226         }
 227
 228         return errors;
 229 }
 230
 231
 232 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 233 {
 234         iapp_deinit(hapd->iapp);
 235         hapd->iapp = NULL;
 236         accounting_deinit(hapd);
 237         hostapd_deinit_wpa(hapd);
 238         vlan_deinit(hapd);
 239         hostapd_acl_deinit(hapd);
 240 #ifndef CONFIG_NO_RADIUS
 241         radius_client_deinit(hapd->radius);
 242         hapd->radius = NULL;
 243 #endif /* CONFIG_NO_RADIUS */
 244
 245         hostapd_deinit_wps(hapd);
 246
 247         authsrv_deinit(hapd);
 248
 249         if (hapd->interface_added &&
 250             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 251                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 252                            hapd->conf->iface);
 253         }
 254
 255         os_free(hapd->probereq_cb);
 256         hapd->probereq_cb = NULL;
 257
 258 #ifdef CONFIG_P2P
 259         wpabuf_free(hapd->p2p_beacon_ie);
 260         hapd->p2p_beacon_ie = NULL;
 261         wpabuf_free(hapd->p2p_probe_resp_ie);
 262         hapd->p2p_probe_resp_ie = NULL;
 263 #endif /* CONFIG_P2P */
 264
 265         wpabuf_free(hapd->time_adv);
 266
 267 #ifdef CONFIG_INTERWORKING
 268         gas_serv_deinit(hapd);
 269 #endif /* CONFIG_INTERWORKING */
 270 }
 271
 272
 273 /**
 274  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 275  * @hapd: Pointer to BSS data
 276  *
 277  * This function is used to free all per-BSS data structures and resources.
 278  * This gets called in a loop for each BSS between calls to
 279  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 280  * is deinitialized. Most of the modules that are initialized in
 281  * hostapd_setup_bss() are deinitialized here.
 282  */
 283 static void hostapd_cleanup(struct hostapd_data *hapd)
 284 {
 285         if (hapd->iface->ctrl_iface_deinit)
 286                 hapd->iface->ctrl_iface_deinit(hapd);
 287         hostapd_free_hapd_data(hapd);
 288 }
 289
 290
 291 /**
 292  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 293  * @iface: Pointer to interface data
 294  *
 295  * This function is called before per-BSS data structures are deinitialized
 296  * with hostapd_cleanup().
 297  */
 298 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 299 {
 300 }
 301
 302
 303 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 304 {
 305         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 306         iface->hw_features = NULL;
 307         os_free(iface->current_rates);
 308         iface->current_rates = NULL;
 309         os_free(iface->basic_rates);
 310         iface->basic_rates = NULL;
 311         ap_list_deinit(iface);
 312 }
 313
 314
 315 /**
 316  * hostapd_cleanup_iface - Complete per-interface cleanup
 317  * @iface: Pointer to interface data
 318  *
 319  * This function is called after per-BSS data structures are deinitialized
 320  * with hostapd_cleanup().
 321  */
 322 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 323 {
 324         hostapd_cleanup_iface_partial(iface);
 325         hostapd_config_free(iface->conf);
 326         iface->conf = NULL;
 327
 328         os_free(iface->config_fname);
 329         os_free(iface->bss);
 330         os_free(iface);
 331 }
 332
 333
 334 static void hostapd_clear_wep(struct hostapd_data *hapd)
 335 {
 336         if (hapd->drv_priv) {
 337                 hostapd_set_privacy(hapd, 0);
 338                 hostapd_broadcast_wep_clear(hapd);
 339         }
 340 }
 341
 342
 343 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 344 {
 345         int i;
 346
 347         hostapd_broadcast_wep_set(hapd);
 348
 349         if (hapd->conf->ssid.wep.default_len) {
 350                 hostapd_set_privacy(hapd, 1);
 351                 return 0;
 352         }
 353
 354         /*
 355          * When IEEE 802.1X is not enabled, the driver may need to know how to
 356          * set authentication algorithms for static WEP.
 357          */
 358         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 359
 360         for (i = 0; i < 4; i++) {
 361                 if (hapd->conf->ssid.wep.key[i] &&
 362                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 363                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 364                                         hapd->conf->ssid.wep.key[i],
 365                                         hapd->conf->ssid.wep.len[i])) {
 366                         wpa_printf(MSG_WARNING, "Could not set WEP "
 367                                    "encryption.");
 368                         return -1;
 369                 }
 370                 if (hapd->conf->ssid.wep.key[i] &&
 371                     i == hapd->conf->ssid.wep.idx)
 372                         hostapd_set_privacy(hapd, 1);
 373         }
 374
 375         return 0;
 376 }
 377
 378
 379 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 380 {
 381         int ret = 0;
 382         u8 addr[ETH_ALEN];
 383
 384         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 385                 return 0;
 386
 387         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Flushing old station entries");
 388         if (hostapd_flush(hapd)) {
 389                 wpa_msg(hapd->msg_ctx, MSG_WARNING, "Could not connect to "
 390                         "kernel driver");
 391                 ret = -1;
 392         }
 393         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 394         os_memset(addr, 0xff, ETH_ALEN);
 395         hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 396         hostapd_free_stas(hapd);
 397
 398         return ret;
 399 }
 400
 401
 402 /**
 403  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 404  * @iface: Pointer to interface data
 405  * Returns: 0 on success, -1 on failure
 406  *
 407  * This function is used to validate that the configured BSSIDs are valid.
 408  */
 409 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 410 {
 411         u8 mask[ETH_ALEN] = { 0 };
 412         struct hostapd_data *hapd = iface->bss[0];
 413         unsigned int i = iface->conf->num_bss, bits = 0, j;
 414         int auto_addr = 0;
 415
 416         if (hostapd_drv_none(hapd))
 417                 return 0;
 418
 419         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 420
 421         /* Determine the bits necessary to cover the number of BSSIDs. */
 422         for (i--; i; i >>= 1)
 423                 bits++;
 424
 425         /* Determine the bits necessary to any configured BSSIDs,
 426            if they are higher than the number of BSSIDs. */
 427         for (j = 0; j < iface->conf->num_bss; j++) {
 428                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 429                         if (j)
 430                                 auto_addr++;
 431                         continue;
 432                 }
 433
 434                 for (i = 0; i < ETH_ALEN; i++) {
 435                         mask[i] |=
 436                                 iface->conf->bss[j].bssid[i] ^
 437                                 hapd->own_addr[i];
 438                 }
 439         }
 440
 441         if (!auto_addr)
 442                 goto skip_mask_ext;
 443
 444         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 445                 ;
 446         j = 0;
 447         if (i < ETH_ALEN) {
 448                 j = (5 - i) * 8;
 449
 450                 while (mask[i] != 0) {
 451                         mask[i] >>= 1;
 452                         j++;
 453                 }
 454         }
 455
 456         if (bits < j)
 457                 bits = j;
 458
 459         if (bits > 40) {
 460                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 461                            bits);
 462                 return -1;
 463         }
 464
 465         os_memset(mask, 0xff, ETH_ALEN);
 466         j = bits / 8;
 467         for (i = 5; i > 5 - j; i--)
 468                 mask[i] = 0;
 469         j = bits % 8;
 470         while (j--)
 471                 mask[i] <<= 1;
 472
 473 skip_mask_ext:
 474         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 475                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 476
 477         if (!auto_addr)
 478                 return 0;
 479
 480         for (i = 0; i < ETH_ALEN; i++) {
 481                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 482                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 483                                    " for start address " MACSTR ".",
 484                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 485                         wpa_printf(MSG_ERROR, "Start address must be the "
 486                                    "first address in the block (i.e., addr "
 487                                    "AND mask == addr).");
 488                         return -1;
 489                 }
 490         }
 491
 492         return 0;
 493 }
 494
 495
 496 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 497 {
 498         size_t i;
 499
 500         for (i = 0; i < conf->num_bss; i++) {
 501                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 502                         return 1;
 503                 }
 504         }
 505
 506         return 0;
 507 }
 508
 509
 510
 511
 512 /**
 513  * hostapd_setup_bss - Per-BSS setup (initialization)
 514  * @hapd: Pointer to BSS data
 515  * @first: Whether this BSS is the first BSS of an interface
 516  *
 517  * This function is used to initialize all per-BSS data structures and
 518  * resources. This gets called in a loop for each BSS when an interface is
 519  * initialized. Most of the modules that are initialized here will be
 520  * deinitialized in hostapd_cleanup().
 521  */
 522 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 523 {
 524         struct hostapd_bss_config *conf = hapd->conf;
 525         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 526         int ssid_len, set_ssid;
 527         char force_ifname[IFNAMSIZ];
 528         u8 if_addr[ETH_ALEN];
 529
 530         if (!first) {
 531                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 532                         /* Allocate the next available BSSID. */
 533                         do {
 534                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 535                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 536                 } else {
 537                         /* Allocate the configured BSSID. */
 538                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 539
 540                         if (hostapd_mac_comp(hapd->own_addr,
 541                                              hapd->iface->bss[0]->own_addr) ==
 542                             0) {
 543                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 544                                            "BSSID set to the MAC address of "
 545                                            "the radio", hapd->conf->iface);
 546                                 return -1;
 547                         }
 548                 }
 549
 550                 hapd->interface_added = 1;
 551                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 552                                    hapd->conf->iface, hapd->own_addr, hapd,
 553                                    &hapd->drv_priv, force_ifname, if_addr,
 554                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 555                                    NULL)) {
 556                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 557                                    MACSTR ")", MAC2STR(hapd->own_addr));
 558                         return -1;
 559                 }
 560         }
 561
 562         if (conf->wmm_enabled < 0)
 563                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 564
 565         hostapd_flush_old_stations(hapd);
 566         hostapd_set_privacy(hapd, 0);
 567
 568         hostapd_broadcast_wep_clear(hapd);
 569         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 570                 return -1;
 571
 572         /*
 573          * Fetch the SSID from the system and use it or,
 574          * if one was specified in the config file, verify they
 575          * match.
 576          */
 577         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 578         if (ssid_len < 0) {
 579                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 580                 return -1;
 581         }
 582         if (conf->ssid.ssid_set) {
 583                 /*
 584                  * If SSID is specified in the config file and it differs
 585                  * from what is being used then force installation of the
 586                  * new SSID.
 587                  */
 588                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 589                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 590         } else {
 591                 /*
 592                  * No SSID in the config file; just use the one we got
 593                  * from the system.
 594                  */
 595                 set_ssid = 0;
 596                 conf->ssid.ssid_len = ssid_len;
 597                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 598                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 599         }
 600
 601         if (!hostapd_drv_none(hapd)) {
 602                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 603                            " and ssid '%s'",
 604                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 605                            hapd->conf->ssid.ssid);
 606         }
 607
 608         if (hostapd_setup_wpa_psk(conf)) {
 609                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 610                 return -1;
 611         }
 612
 613         /* Set SSID for the kernel driver (to be used in beacon and probe
 614          * response frames) */
 615         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 616                                          conf->ssid.ssid_len)) {
 617                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 618                 return -1;
 619         }
 620
 621         if (wpa_debug_level == MSG_MSGDUMP)
 622                 conf->radius->msg_dumps = 1;
 623 #ifndef CONFIG_NO_RADIUS
 624         hapd->radius = radius_client_init(hapd, conf->radius);
 625         if (hapd->radius == NULL) {
 626                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 627                 return -1;
 628         }
 629 #endif /* CONFIG_NO_RADIUS */
 630
 631         if (hostapd_acl_init(hapd)) {
 632                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 633                 return -1;
 634         }
 635         if (hostapd_init_wps(hapd, conf))
 636                 return -1;
 637
 638         if (authsrv_init(hapd) < 0)
 639                 return -1;
 640
 641         if (ieee802_1x_init(hapd)) {
 642                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 643                 return -1;
 644         }
 645
 646         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 647                 return -1;
 648
 649         if (accounting_init(hapd)) {
 650                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 651                 return -1;
 652         }
 653
 654         if (hapd->conf->ieee802_11f &&
 655             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 656                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 657                            "failed.");
 658                 return -1;
 659         }
 660
 661 #ifdef CONFIG_INTERWORKING
 662         if (gas_serv_init(hapd)) {
 663                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
 664                 return -1;
 665         }
 666 #endif /* CONFIG_INTERWORKING */
 667
 668         if (hapd->iface->ctrl_iface_init &&
 669             hapd->iface->ctrl_iface_init(hapd)) {
 670                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 671                 return -1;
 672         }
 673
 674         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 675                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 676                 return -1;
 677         }
 678
 679         ieee802_11_set_beacon(hapd);
 680
 681         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 682                 return -1;
 683
 684         if (hapd->driver && hapd->driver->set_operstate)
 685                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 686
 687         return 0;
 688 }
 689
 690
 691 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 692 {
 693         struct hostapd_data *hapd = iface->bss[0];
 694         int i;
 695         struct hostapd_tx_queue_params *p;
 696
 697         for (i = 0; i < NUM_TX_QUEUES; i++) {
 698                 p = &iface->conf->tx_queue[i];
 699
 700                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 701                                                 p->cwmax, p->burst)) {
 702                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 703                                    "parameters for queue %d.", i);
 704                         /* Continue anyway */
 705                 }
 706         }
 707 }
 708
 709
 710 static int setup_interface(struct hostapd_iface *iface)
 711 {
 712         struct hostapd_data *hapd = iface->bss[0];
 713         size_t i;
 714         char country[4];
 715
 716         /*
 717          * Make sure that all BSSes get configured with a pointer to the same
 718          * driver interface.
 719          */
 720         for (i = 1; i < iface->num_bss; i++) {
 721                 iface->bss[i]->driver = hapd->driver;
 722                 iface->bss[i]->drv_priv = hapd->drv_priv;
 723         }
 724
 725         if (hostapd_validate_bssid_configuration(iface))
 726                 return -1;
 727
 728         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 729                 os_memcpy(country, hapd->iconf->country, 3);
 730                 country[3] = '\0';
 731                 if (hostapd_set_country(hapd, country) < 0) {
 732                         wpa_printf(MSG_ERROR, "Failed to set country code");
 733                         return -1;
 734                 }
 735         }
 736
 737         if (hostapd_get_hw_features(iface)) {
 738                 /* Not all drivers support this yet, so continue without hw
 739                  * feature data. */
 740         } else {
 741                 int ret = hostapd_select_hw_mode(iface);
 742                 if (ret < 0) {
 743                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 744                                    "channel. (%d)", ret);
 745                         return -1;
 746                 }
 747                 ret = hostapd_check_ht_capab(iface);
 748                 if (ret < 0)
 749                         return -1;
 750                 if (ret == 1) {
 751                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 752                                    "be completed in a callback");
 753                         return 0;
 754                 }
 755         }
 756         return hostapd_setup_interface_complete(iface, 0);
 757 }
 758
 759
 760 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 761 {
 762         struct hostapd_data *hapd = iface->bss[0];
 763         size_t j;
 764         u8 *prev_addr;
 765
 766         if (err) {
 767                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 768                 eloop_terminate();
 769                 return -1;
 770         }
 771
 772         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 773         if (hapd->iconf->channel) {
 774                 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 775                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 776                            "Frequency: %d MHz",
 777                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 778                            hapd->iconf->channel, iface->freq);
 779
 780                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 781                                      hapd->iconf->channel,
 782                                      hapd->iconf->ieee80211n,
 783                                      hapd->iconf->secondary_channel)) {
 784                         wpa_printf(MSG_ERROR, "Could not set channel for "
 785                                    "kernel driver");
 786                         return -1;
 787                 }
 788         }
 789
 790         if (iface->current_mode) {
 791                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
 792                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
 793                                    "table.");
 794                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 795                                        HOSTAPD_LEVEL_WARNING,
 796                                        "Failed to prepare rates table.");
 797                         return -1;
 798                 }
 799         }
 800
 801         if (hapd->iconf->rts_threshold > -1 &&
 802             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 803                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 804                            "kernel driver");
 805                 return -1;
 806         }
 807
 808         if (hapd->iconf->fragm_threshold > -1 &&
 809             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 810                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 811                            "for kernel driver");
 812                 return -1;
 813         }
 814
 815         prev_addr = hapd->own_addr;
 816
 817         for (j = 0; j < iface->num_bss; j++) {
 818                 hapd = iface->bss[j];
 819                 if (j)
 820                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 821                 if (hostapd_setup_bss(hapd, j == 0))
 822                         return -1;
 823                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 824                         prev_addr = hapd->own_addr;
 825         }
 826
 827         hostapd_tx_queue_params(iface);
 828
 829         ap_list_init(iface);
 830
 831         if (hostapd_driver_commit(hapd) < 0) {
 832                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 833                            "configuration", __func__);
 834                 return -1;
 835         }
 836
 837         /*
 838          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
 839          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
 840          * mode), the interface is up only after driver_commit, so initialize
 841          * WPS after driver_commit.
 842          */
 843         for (j = 0; j < iface->num_bss; j++) {
 844                 if (hostapd_init_wps_complete(iface->bss[j]))
 845                         return -1;
 846         }
 847
 848         if (hapd->setup_complete_cb)
 849                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
 850
 851         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 852                    iface->bss[0]->conf->iface);
 853
 854         return 0;
 855 }
 856
 857
 858 /**
 859  * hostapd_setup_interface - Setup of an interface
 860  * @iface: Pointer to interface data.
 861  * Returns: 0 on success, -1 on failure
 862  *
 863  * Initializes the driver interface, validates the configuration,
 864  * and sets driver parameters based on the configuration.
 865  * Flushes old stations, sets the channel, encryption,
 866  * beacons, and WDS links based on the configuration.
 867  */
 868 int hostapd_setup_interface(struct hostapd_iface *iface)
 869 {
 870         int ret;
 871
 872         ret = setup_interface(iface);
 873         if (ret) {
 874                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 875                            iface->bss[0]->conf->iface);
 876                 return -1;
 877         }
 878
 879         return 0;
 880 }
 881
 882
 883 /**
 884  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 885  * @hapd_iface: Pointer to interface data
 886  * @conf: Pointer to per-interface configuration
 887  * @bss: Pointer to per-BSS configuration for this BSS
 888  * Returns: Pointer to allocated BSS data
 889  *
 890  * This function is used to allocate per-BSS data structure. This data will be
 891  * freed after hostapd_cleanup() is called for it during interface
 892  * deinitialization.
 893  */
 894 struct hostapd_data *
 895 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 896                        struct hostapd_config *conf,
 897                        struct hostapd_bss_config *bss)
 898 {
 899         struct hostapd_data *hapd;
 900
 901         hapd = os_zalloc(sizeof(*hapd));
 902         if (hapd == NULL)
 903                 return NULL;
 904
 905         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 906         hapd->iconf = conf;
 907         hapd->conf = bss;
 908         hapd->iface = hapd_iface;
 909         hapd->driver = hapd->iconf->driver;
 910         hapd->ctrl_sock = -1;
 911
 912         return hapd;
 913 }
 914
 915
 916 void hostapd_interface_deinit(struct hostapd_iface *iface)
 917 {
 918         size_t j;
 919
 920         if (iface == NULL)
 921                 return;
 922
 923         hostapd_cleanup_iface_pre(iface);
 924         for (j = 0; j < iface->num_bss; j++) {
 925                 struct hostapd_data *hapd = iface->bss[j];
 926                 hostapd_free_stas(hapd);
 927                 hostapd_flush_old_stations(hapd);
 928                 hostapd_clear_wep(hapd);
 929                 hostapd_cleanup(hapd);
 930         }
 931 }
 932
 933
 934 void hostapd_interface_free(struct hostapd_iface *iface)
 935 {
 936         size_t j;
 937         for (j = 0; j < iface->num_bss; j++)
 938                 os_free(iface->bss[j]);
 939         hostapd_cleanup_iface(iface);
 940 }
 941
 942
 943 /**
 944  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 945  * @hapd: Pointer to BSS data
 946  * @sta: Pointer to the associated STA data
 947  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 948  *
 949  * This function will be called whenever a station associates with the AP. It
 950  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 951  * from drv_callbacks.c based on driver events for drivers that take care of
 952  * management frames (IEEE 802.11 authentication and association) internally.
 953  */
 954 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 955                            int reassoc)
 956 {
 957         if (hapd->tkip_countermeasures) {
 958                 hostapd_drv_sta_deauth(hapd, sta->addr,
 959                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
 960                 return;
 961         }
 962
 963         hostapd_prune_associations(hapd, sta->addr);
 964
 965         /* IEEE 802.11F (IAPP) */
 966         if (hapd->conf->ieee802_11f)
 967                 iapp_new_station(hapd->iapp, sta);
 968
 969 #ifdef CONFIG_P2P
 970         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
 971                 sta->no_p2p_set = 1;
 972                 hapd->num_sta_no_p2p++;
 973                 if (hapd->num_sta_no_p2p == 1)
 974                         hostapd_p2p_non_p2p_sta_connected(hapd);
 975         }
 976 #endif /* CONFIG_P2P */
 977
 978         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 979          * IEEE 802.1X/WPA code will start accounting after the station has
 980          * been authorized. */
 981         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 982                 accounting_sta_start(hapd, sta);
 983
 984         /* Start IEEE 802.1X authentication process for new stations */
 985         ieee802_1x_new_station(hapd, sta);
 986         if (reassoc) {
 987                 if (sta->auth_alg != WLAN_AUTH_FT &&
 988                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 989                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 990         } else
 991                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 992 }