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
  39
  40 static int hostapd_flush_old_stations(struct hostapd_data *hapd);
  41 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  42
  43 extern int wpa_debug_level;
  44
  45
  46 int hostapd_reload_config(struct hostapd_iface *iface)
  47 {
  48         struct hostapd_data *hapd = iface->bss[0];
  49         struct hostapd_config *newconf, *oldconf;
  50         size_t j;
  51
  52         if (iface->config_read_cb == NULL)
  53                 return -1;
  54         newconf = iface->config_read_cb(iface->config_fname);
  55         if (newconf == NULL)
  56                 return -1;
  57
  58         /*
  59          * Deauthenticate all stations since the new configuration may not
  60          * allow them to use the BSS anymore.
  61          */
  62         for (j = 0; j < iface->num_bss; j++)
  63                 hostapd_flush_old_stations(iface->bss[j]);
  64
  65 #ifndef CONFIG_NO_RADIUS
  66         /* TODO: update dynamic data based on changed configuration
  67          * items (e.g., open/close sockets, etc.) */
  68         radius_client_flush(hapd->radius, 0);
  69 #endif /* CONFIG_NO_RADIUS */
  70
  71         oldconf = hapd->iconf;
  72         hapd->iconf = newconf;
  73         hapd->conf = &newconf->bss[0];
  74         iface->conf = newconf;
  75
  76         if (hostapd_setup_wpa_psk(hapd->conf)) {
  77                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  78                            "after reloading configuration");
  79         }
  80
  81         if (hapd->conf->wpa && hapd->wpa_auth == NULL)
  82                 hostapd_setup_wpa(hapd);
  83         else if (hapd->conf->wpa)
  84                 hostapd_reconfig_wpa(hapd);
  85         else if (hapd->wpa_auth) {
  86                 wpa_deinit(hapd->wpa_auth);
  87                 hapd->wpa_auth = NULL;
  88                 hostapd_set_privacy(hapd, 0);
  89                 hostapd_setup_encryption(hapd->conf->iface, hapd);
  90         }
  91
  92         ieee802_11_set_beacon(hapd);
  93
  94         if (hapd->conf->ssid.ssid_set &&
  95             hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
  96                              hapd->conf->ssid.ssid_len)) {
  97                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
  98                 /* try to continue */
  99         }
 100
 101         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
 102                 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
 103         else
 104                 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
 105
 106         hostapd_config_free(oldconf);
 107
 108         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 109
 110         return 0;
 111 }
 112
 113
 114 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 115                                               char *ifname)
 116 {
 117         int i;
 118
 119         for (i = 0; i < NUM_WEP_KEYS; i++) {
 120                 if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 121                                       i == 0 ? 1 : 0, NULL, 0, NULL, 0)) {
 122                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 123                                    "encryption keys (ifname=%s keyidx=%d)",
 124                                    ifname, i);
 125                 }
 126         }
 127 #ifdef CONFIG_IEEE80211W
 128         if (hapd->conf->ieee80211w) {
 129                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 130                         if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL,
 131                                               i, i == 0 ? 1 : 0, NULL, 0,
 132                                               NULL, 0)) {
 133                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 134                                            "default mgmt encryption keys "
 135                                            "(ifname=%s keyidx=%d)", ifname, i);
 136                         }
 137                 }
 138         }
 139 #endif /* CONFIG_IEEE80211W */
 140 }
 141
 142
 143 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 144 {
 145         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 146         return 0;
 147 }
 148
 149
 150 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 151 {
 152         int errors = 0, idx;
 153         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 154
 155         idx = ssid->wep.idx;
 156         if (ssid->wep.default_len &&
 157             hapd->drv.set_key(hapd->conf->iface,
 158                               hapd, WPA_ALG_WEP, NULL, idx,
 159                               idx == ssid->wep.idx,
 160                               NULL, 0, ssid->wep.key[idx],
 161                               ssid->wep.len[idx])) {
 162                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 163                 errors++;
 164         }
 165
 166         if (ssid->dyn_vlan_keys) {
 167                 size_t i;
 168                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 169                         const char *ifname;
 170                         struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
 171                         if (key == NULL)
 172                                 continue;
 173                         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 174                                                             i);
 175                         if (ifname == NULL)
 176                                 continue;
 177
 178                         idx = key->idx;
 179                         if (hapd->drv.set_key(ifname, hapd, WPA_ALG_WEP, NULL,
 180                                               idx, idx == key->idx, NULL, 0,
 181                                               key->key[idx], key->len[idx])) {
 182                                 wpa_printf(MSG_WARNING, "Could not set "
 183                                            "dynamic VLAN WEP encryption.");
 184                                 errors++;
 185                         }
 186                 }
 187         }
 188
 189         return errors;
 190 }
 191
 192 /**
 193  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 194  * @hapd: Pointer to BSS data
 195  *
 196  * This function is used to free all per-BSS data structures and resources.
 197  * This gets called in a loop for each BSS between calls to
 198  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 199  * is deinitialized. Most of the modules that are initialized in
 200  * hostapd_setup_bss() are deinitialized here.
 201  */
 202 static void hostapd_cleanup(struct hostapd_data *hapd)
 203 {
 204         if (hapd->iface->ctrl_iface_deinit)
 205                 hapd->iface->ctrl_iface_deinit(hapd);
 206
 207         iapp_deinit(hapd->iapp);
 208         hapd->iapp = NULL;
 209         accounting_deinit(hapd);
 210         hostapd_deinit_wpa(hapd);
 211         vlan_deinit(hapd);
 212         hostapd_acl_deinit(hapd);
 213 #ifndef CONFIG_NO_RADIUS
 214         radius_client_deinit(hapd->radius);
 215         hapd->radius = NULL;
 216 #endif /* CONFIG_NO_RADIUS */
 217
 218         hostapd_deinit_wps(hapd);
 219
 220         authsrv_deinit(hapd);
 221
 222         if (hapd->interface_added &&
 223             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 224                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 225                            hapd->conf->iface);
 226         }
 227
 228         os_free(hapd->probereq_cb);
 229         hapd->probereq_cb = NULL;
 230 }
 231
 232
 233 /**
 234  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 235  * @iface: Pointer to interface data
 236  *
 237  * This function is called before per-BSS data structures are deinitialized
 238  * with hostapd_cleanup().
 239  */
 240 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 241 {
 242 }
 243
 244
 245 /**
 246  * hostapd_cleanup_iface - Complete per-interface cleanup
 247  * @iface: Pointer to interface data
 248  *
 249  * This function is called after per-BSS data structures are deinitialized
 250  * with hostapd_cleanup().
 251  */
 252 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 253 {
 254         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 255         iface->hw_features = NULL;
 256         os_free(iface->current_rates);
 257         iface->current_rates = NULL;
 258         ap_list_deinit(iface);
 259         hostapd_config_free(iface->conf);
 260         iface->conf = NULL;
 261
 262         os_free(iface->config_fname);
 263         os_free(iface->bss);
 264         os_free(iface);
 265 }
 266
 267
 268 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 269 {
 270         int i;
 271
 272         hostapd_broadcast_wep_set(hapd);
 273
 274         if (hapd->conf->ssid.wep.default_len) {
 275                 hostapd_set_privacy(hapd, 1);
 276                 return 0;
 277         }
 278
 279         for (i = 0; i < 4; i++) {
 280                 if (hapd->conf->ssid.wep.key[i] &&
 281                     hapd->drv.set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 282                                       i == hapd->conf->ssid.wep.idx, NULL, 0,
 283                                       hapd->conf->ssid.wep.key[i],
 284                                       hapd->conf->ssid.wep.len[i])) {
 285                         wpa_printf(MSG_WARNING, "Could not set WEP "
 286                                    "encryption.");
 287                         return -1;
 288                 }
 289                 if (hapd->conf->ssid.wep.key[i] &&
 290                     i == hapd->conf->ssid.wep.idx)
 291                         hostapd_set_privacy(hapd, 1);
 292         }
 293
 294         return 0;
 295 }
 296
 297
 298 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 299 {
 300         int ret = 0;
 301
 302         if (hostapd_drv_none(hapd))
 303                 return 0;
 304
 305         wpa_printf(MSG_DEBUG, "Flushing old station entries");
 306         if (hostapd_flush(hapd)) {
 307                 wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
 308                 ret = -1;
 309         }
 310         wpa_printf(MSG_DEBUG, "Deauthenticate all stations");
 311
 312         /* New Prism2.5/3 STA firmware versions seem to have issues with this
 313          * broadcast deauth frame. This gets the firmware in odd state where
 314          * nothing works correctly, so let's skip sending this for the hostap
 315          * driver. */
 316         if (hapd->driver && os_strcmp(hapd->driver->name, "hostap") != 0) {
 317                 u8 addr[ETH_ALEN];
 318                 os_memset(addr, 0xff, ETH_ALEN);
 319                 hapd->drv.sta_deauth(hapd, addr,
 320                                      WLAN_REASON_PREV_AUTH_NOT_VALID);
 321         }
 322
 323         return ret;
 324 }
 325
 326
 327 /**
 328  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 329  * @iface: Pointer to interface data
 330  * Returns: 0 on success, -1 on failure
 331  *
 332  * This function is used to validate that the configured BSSIDs are valid.
 333  */
 334 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 335 {
 336         u8 mask[ETH_ALEN] = { 0 };
 337         struct hostapd_data *hapd = iface->bss[0];
 338         unsigned int i = iface->conf->num_bss, bits = 0, j;
 339         int res;
 340         int auto_addr = 0;
 341
 342         if (hostapd_drv_none(hapd))
 343                 return 0;
 344
 345         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 346
 347         /* Determine the bits necessary to cover the number of BSSIDs. */
 348         for (i--; i; i >>= 1)
 349                 bits++;
 350
 351         /* Determine the bits necessary to any configured BSSIDs,
 352            if they are higher than the number of BSSIDs. */
 353         for (j = 0; j < iface->conf->num_bss; j++) {
 354                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 355                         if (j)
 356                                 auto_addr++;
 357                         continue;
 358                 }
 359
 360                 for (i = 0; i < ETH_ALEN; i++) {
 361                         mask[i] |=
 362                                 iface->conf->bss[j].bssid[i] ^
 363                                 hapd->own_addr[i];
 364                 }
 365         }
 366
 367         if (!auto_addr)
 368                 goto skip_mask_ext;
 369
 370         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 371                 ;
 372         j = 0;
 373         if (i < ETH_ALEN) {
 374                 j = (5 - i) * 8;
 375
 376                 while (mask[i] != 0) {
 377                         mask[i] >>= 1;
 378                         j++;
 379                 }
 380         }
 381
 382         if (bits < j)
 383                 bits = j;
 384
 385         if (bits > 40) {
 386                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 387                            bits);
 388                 return -1;
 389         }
 390
 391         os_memset(mask, 0xff, ETH_ALEN);
 392         j = bits / 8;
 393         for (i = 5; i > 5 - j; i--)
 394                 mask[i] = 0;
 395         j = bits % 8;
 396         while (j--)
 397                 mask[i] <<= 1;
 398
 399 skip_mask_ext:
 400         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 401                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 402
 403         res = hostapd_valid_bss_mask(hapd, hapd->own_addr, mask);
 404         if (res == 0)
 405                 return 0;
 406
 407         if (res < 0) {
 408                 wpa_printf(MSG_ERROR, "Driver did not accept BSSID mask "
 409                            MACSTR " for start address " MACSTR ".",
 410                            MAC2STR(mask), MAC2STR(hapd->own_addr));
 411                 return -1;
 412         }
 413
 414         if (!auto_addr)
 415                 return 0;
 416
 417         for (i = 0; i < ETH_ALEN; i++) {
 418                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 419                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 420                                    " for start address " MACSTR ".",
 421                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 422                         wpa_printf(MSG_ERROR, "Start address must be the "
 423                                    "first address in the block (i.e., addr "
 424                                    "AND mask == addr).");
 425                         return -1;
 426                 }
 427         }
 428
 429         return 0;
 430 }
 431
 432
 433 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 434 {
 435         size_t i;
 436
 437         for (i = 0; i < conf->num_bss; i++) {
 438                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 439                         return 1;
 440                 }
 441         }
 442
 443         return 0;
 444 }
 445
 446
 447
 448
 449 /**
 450  * hostapd_setup_bss - Per-BSS setup (initialization)
 451  * @hapd: Pointer to BSS data
 452  * @first: Whether this BSS is the first BSS of an interface
 453  *
 454  * This function is used to initialize all per-BSS data structures and
 455  * resources. This gets called in a loop for each BSS when an interface is
 456  * initialized. Most of the modules that are initialized here will be
 457  * deinitialized in hostapd_cleanup().
 458  */
 459 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 460 {
 461         struct hostapd_bss_config *conf = hapd->conf;
 462         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 463         int ssid_len, set_ssid;
 464
 465         if (!first) {
 466                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 467                         /* Allocate the next available BSSID. */
 468                         do {
 469                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 470                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 471                 } else {
 472                         /* Allocate the configured BSSID. */
 473                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 474
 475                         if (hostapd_mac_comp(hapd->own_addr,
 476                                              hapd->iface->bss[0]->own_addr) ==
 477                             0) {
 478                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 479                                            "BSSID set to the MAC address of "
 480                                            "the radio", hapd->conf->iface);
 481                                 return -1;
 482                         }
 483                 }
 484
 485                 hapd->interface_added = 1;
 486                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 487                                    hapd->conf->iface, hapd->own_addr, hapd,
 488                                    &hapd->drv_priv)) {
 489                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 490                                    MACSTR ")", MAC2STR(hapd->own_addr));
 491                         return -1;
 492                 }
 493         }
 494
 495         hostapd_flush_old_stations(hapd);
 496         hostapd_set_privacy(hapd, 0);
 497
 498         hostapd_broadcast_wep_clear(hapd);
 499         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 500                 return -1;
 501
 502         /*
 503          * Fetch the SSID from the system and use it or,
 504          * if one was specified in the config file, verify they
 505          * match.
 506          */
 507         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 508         if (ssid_len < 0) {
 509                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 510                 return -1;
 511         }
 512         if (conf->ssid.ssid_set) {
 513                 /*
 514                  * If SSID is specified in the config file and it differs
 515                  * from what is being used then force installation of the
 516                  * new SSID.
 517                  */
 518                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 519                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 520         } else {
 521                 /*
 522                  * No SSID in the config file; just use the one we got
 523                  * from the system.
 524                  */
 525                 set_ssid = 0;
 526                 conf->ssid.ssid_len = ssid_len;
 527                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 528                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 529         }
 530
 531         if (!hostapd_drv_none(hapd)) {
 532                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 533                            " and ssid '%s'",
 534                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 535                            hapd->conf->ssid.ssid);
 536         }
 537
 538         if (hostapd_setup_wpa_psk(conf)) {
 539                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 540                 return -1;
 541         }
 542
 543         /* Set SSID for the kernel driver (to be used in beacon and probe
 544          * response frames) */
 545         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 546                                          conf->ssid.ssid_len)) {
 547                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 548                 return -1;
 549         }
 550
 551         if (wpa_debug_level == MSG_MSGDUMP)
 552                 conf->radius->msg_dumps = 1;
 553 #ifndef CONFIG_NO_RADIUS
 554         hapd->radius = radius_client_init(hapd, conf->radius);
 555         if (hapd->radius == NULL) {
 556                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 557                 return -1;
 558         }
 559 #endif /* CONFIG_NO_RADIUS */
 560
 561         if (hostapd_acl_init(hapd)) {
 562                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 563                 return -1;
 564         }
 565         if (hostapd_init_wps(hapd, conf))
 566                 return -1;
 567
 568         if (authsrv_init(hapd) < 0)
 569                 return -1;
 570
 571         if (ieee802_1x_init(hapd)) {
 572                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 573                 return -1;
 574         }
 575
 576         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 577                 return -1;
 578
 579         if (accounting_init(hapd)) {
 580                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 581                 return -1;
 582         }
 583
 584         if (hapd->conf->ieee802_11f &&
 585             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 586                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 587                            "failed.");
 588                 return -1;
 589         }
 590
 591         if (hapd->iface->ctrl_iface_init &&
 592             hapd->iface->ctrl_iface_init(hapd)) {
 593                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 594                 return -1;
 595         }
 596
 597         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 598                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 599                 return -1;
 600         }
 601
 602         ieee802_11_set_beacon(hapd);
 603
 604         return 0;
 605 }
 606
 607
 608 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 609 {
 610         struct hostapd_data *hapd = iface->bss[0];
 611         int i;
 612         struct hostapd_tx_queue_params *p;
 613
 614         for (i = 0; i < NUM_TX_QUEUES; i++) {
 615                 p = &iface->conf->tx_queue[i];
 616
 617                 if (!p->configured)
 618                         continue;
 619
 620                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 621                                                 p->cwmax, p->burst)) {
 622                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 623                                    "parameters for queue %d.", i);
 624                         /* Continue anyway */
 625                 }
 626         }
 627 }
 628
 629
 630 static int setup_interface(struct hostapd_iface *iface)
 631 {
 632         struct hostapd_data *hapd = iface->bss[0];
 633         size_t i;
 634         char country[4];
 635
 636         /*
 637          * Make sure that all BSSes get configured with a pointer to the same
 638          * driver interface.
 639          */
 640         for (i = 1; i < iface->num_bss; i++) {
 641                 iface->bss[i]->driver = hapd->driver;
 642                 iface->bss[i]->drv_priv = hapd->drv_priv;
 643         }
 644
 645         if (hostapd_validate_bssid_configuration(iface))
 646                 return -1;
 647
 648         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 649                 os_memcpy(country, hapd->iconf->country, 3);
 650                 country[3] = '\0';
 651                 if (hostapd_set_country(hapd, country) < 0) {
 652                         wpa_printf(MSG_ERROR, "Failed to set country code");
 653                         return -1;
 654                 }
 655         }
 656
 657         if (hostapd_get_hw_features(iface)) {
 658                 /* Not all drivers support this yet, so continue without hw
 659                  * feature data. */
 660         } else {
 661                 int ret = hostapd_select_hw_mode(iface);
 662                 if (ret < 0) {
 663                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 664                                    "channel. (%d)", ret);
 665                         return -1;
 666                 }
 667                 ret = hostapd_check_ht_capab(iface);
 668                 if (ret < 0)
 669                         return -1;
 670                 if (ret == 1) {
 671                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 672                                    "be completed in a callback");
 673                         return 0;
 674                 }
 675         }
 676         return hostapd_setup_interface_complete(iface, 0);
 677 }
 678
 679
 680 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 681 {
 682         struct hostapd_data *hapd = iface->bss[0];
 683         int freq;
 684         size_t j;
 685         u8 *prev_addr;
 686
 687         if (err) {
 688                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 689                 eloop_terminate();
 690                 return -1;
 691         }
 692
 693         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 694         if (hapd->iconf->channel) {
 695                 freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 696                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 697                            "Frequency: %d MHz",
 698                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 699                            hapd->iconf->channel, freq);
 700
 701                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, freq,
 702                                      hapd->iconf->channel,
 703                                      hapd->iconf->ieee80211n,
 704                                      hapd->iconf->secondary_channel)) {
 705                         wpa_printf(MSG_ERROR, "Could not set channel for "
 706                                    "kernel driver");
 707                         return -1;
 708                 }
 709         }
 710
 711         if (hapd->iconf->rts_threshold > -1 &&
 712             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 713                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 714                            "kernel driver");
 715                 return -1;
 716         }
 717
 718         if (hapd->iconf->fragm_threshold > -1 &&
 719             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 720                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 721                            "for kernel driver");
 722                 return -1;
 723         }
 724
 725         prev_addr = hapd->own_addr;
 726
 727         for (j = 0; j < iface->num_bss; j++) {
 728                 hapd = iface->bss[j];
 729                 if (j)
 730                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 731                 if (hostapd_setup_bss(hapd, j == 0))
 732                         return -1;
 733                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 734                         prev_addr = hapd->own_addr;
 735         }
 736
 737         hostapd_tx_queue_params(iface);
 738
 739         ap_list_init(iface);
 740
 741         if (hostapd_driver_commit(hapd) < 0) {
 742                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 743                            "configuration", __func__);
 744                 return -1;
 745         }
 746
 747         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 748                    iface->bss[0]->conf->iface);
 749
 750         return 0;
 751 }
 752
 753
 754 /**
 755  * hostapd_setup_interface - Setup of an interface
 756  * @iface: Pointer to interface data.
 757  * Returns: 0 on success, -1 on failure
 758  *
 759  * Initializes the driver interface, validates the configuration,
 760  * and sets driver parameters based on the configuration.
 761  * Flushes old stations, sets the channel, encryption,
 762  * beacons, and WDS links based on the configuration.
 763  */
 764 int hostapd_setup_interface(struct hostapd_iface *iface)
 765 {
 766         int ret;
 767
 768         ret = setup_interface(iface);
 769         if (ret) {
 770                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 771                            iface->bss[0]->conf->iface);
 772                 return -1;
 773         }
 774
 775         return 0;
 776 }
 777
 778
 779 /**
 780  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 781  * @hapd_iface: Pointer to interface data
 782  * @conf: Pointer to per-interface configuration
 783  * @bss: Pointer to per-BSS configuration for this BSS
 784  * Returns: Pointer to allocated BSS data
 785  *
 786  * This function is used to allocate per-BSS data structure. This data will be
 787  * freed after hostapd_cleanup() is called for it during interface
 788  * deinitialization.
 789  */
 790 struct hostapd_data *
 791 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 792                        struct hostapd_config *conf,
 793                        struct hostapd_bss_config *bss)
 794 {
 795         struct hostapd_data *hapd;
 796
 797         hapd = os_zalloc(sizeof(*hapd));
 798         if (hapd == NULL)
 799                 return NULL;
 800
 801         hostapd_set_driver_ops(&hapd->drv);
 802         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 803         hapd->iconf = conf;
 804         hapd->conf = bss;
 805         hapd->iface = hapd_iface;
 806         hapd->driver = hapd->iconf->driver;
 807
 808         return hapd;
 809 }
 810
 811
 812 void hostapd_interface_deinit(struct hostapd_iface *iface)
 813 {
 814         size_t j;
 815
 816         if (iface == NULL)
 817                 return;
 818
 819         hostapd_cleanup_iface_pre(iface);
 820         for (j = 0; j < iface->num_bss; j++) {
 821                 struct hostapd_data *hapd = iface->bss[j];
 822                 hostapd_free_stas(hapd);
 823                 hostapd_flush_old_stations(hapd);
 824                 hostapd_cleanup(hapd);
 825         }
 826 }
 827
 828
 829 void hostapd_interface_free(struct hostapd_iface *iface)
 830 {
 831         size_t j;
 832         for (j = 0; j < iface->num_bss; j++)
 833                 os_free(iface->bss[j]);
 834         hostapd_cleanup_iface(iface);
 835 }
 836
 837
 838 /**
 839  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 840  * @hapd: Pointer to BSS data
 841  * @sta: Pointer to the associated STA data
 842  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 843  *
 844  * This function will be called whenever a station associates with the AP. It
 845  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 846  * from drv_callbacks.c based on driver events for drivers that take care of
 847  * management frames (IEEE 802.11 authentication and association) internally.
 848  */
 849 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 850                            int reassoc)
 851 {
 852         if (hapd->tkip_countermeasures) {
 853                 hapd->drv.sta_deauth(hapd, sta->addr,
 854                                      WLAN_REASON_MICHAEL_MIC_FAILURE);
 855                 return;
 856         }
 857
 858         hostapd_prune_associations(hapd, sta->addr);
 859
 860         /* IEEE 802.11F (IAPP) */
 861         if (hapd->conf->ieee802_11f)
 862                 iapp_new_station(hapd->iapp, sta);
 863
 864         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 865          * IEEE 802.1X/WPA code will start accounting after the station has
 866          * been authorized. */
 867         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 868                 accounting_sta_start(hapd, sta);
 869
 870         /* Start IEEE 802.1X authentication process for new stations */
 871         ieee802_1x_new_station(hapd, sta);
 872         if (reassoc) {
 873                 if (sta->auth_alg != WLAN_AUTH_FT &&
 874                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 875                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 876         } else
 877                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 878 }