hostapd/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 "includes.h"
  16
  17 #include "common.h"
  18 #include "eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "radius/radius_client.h"
  21 #include "ap/hostapd.h"
  22 #include "ap/authsrv.h"
  23 #include "ap/sta_info.h"
  24 #include "ap/accounting.h"
  25 #include "ap/ap_list.h"
  26 #include "ap/beacon.h"
  27 #include "ap/iapp.h"
  28 #include "ap/ieee802_1x.h"
  29 #include "ap/ieee802_11_auth.h"
  30 #include "ap/vlan_init.h"
  31 #include "ap/wpa.h"
  32 #include "ap/wps_hostapd.h"
  33 #include "hw_features.h"
  34 #include "driver_i.h"
  35 #include "ctrl_iface.h"
  36 #include "wpa_auth_glue.h"
  37 #include "ap_drv_ops.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         hostapd_ctrl_iface_deinit(hapd);
 205
 206         iapp_deinit(hapd->iapp);
 207         hapd->iapp = NULL;
 208         accounting_deinit(hapd);
 209         hostapd_deinit_wpa(hapd);
 210         vlan_deinit(hapd);
 211         hostapd_acl_deinit(hapd);
 212 #ifndef CONFIG_NO_RADIUS
 213         radius_client_deinit(hapd->radius);
 214         hapd->radius = NULL;
 215 #endif /* CONFIG_NO_RADIUS */
 216
 217         hostapd_deinit_wps(hapd);
 218
 219         authsrv_deinit(hapd);
 220
 221         if (hapd->interface_added &&
 222             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 223                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 224                            hapd->conf->iface);
 225         }
 226
 227         os_free(hapd->probereq_cb);
 228         hapd->probereq_cb = NULL;
 229 }
 230
 231
 232 /**
 233  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 234  * @iface: Pointer to interface data
 235  *
 236  * This function is called before per-BSS data structures are deinitialized
 237  * with hostapd_cleanup().
 238  */
 239 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 240 {
 241 }
 242
 243
 244 /**
 245  * hostapd_cleanup_iface - Complete per-interface cleanup
 246  * @iface: Pointer to interface data
 247  *
 248  * This function is called after per-BSS data structures are deinitialized
 249  * with hostapd_cleanup().
 250  */
 251 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 252 {
 253         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 254         iface->hw_features = NULL;
 255         os_free(iface->current_rates);
 256         iface->current_rates = NULL;
 257         ap_list_deinit(iface);
 258         hostapd_config_free(iface->conf);
 259         iface->conf = NULL;
 260
 261         os_free(iface->config_fname);
 262         os_free(iface->bss);
 263         os_free(iface);
 264 }
 265
 266
 267 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 268 {
 269         int i;
 270
 271         hostapd_broadcast_wep_set(hapd);
 272
 273         if (hapd->conf->ssid.wep.default_len) {
 274                 hostapd_set_privacy(hapd, 1);
 275                 return 0;
 276         }
 277
 278         for (i = 0; i < 4; i++) {
 279                 if (hapd->conf->ssid.wep.key[i] &&
 280                     hapd->drv.set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 281                                       i == hapd->conf->ssid.wep.idx, NULL, 0,
 282                                       hapd->conf->ssid.wep.key[i],
 283                                       hapd->conf->ssid.wep.len[i])) {
 284                         wpa_printf(MSG_WARNING, "Could not set WEP "
 285                                    "encryption.");
 286                         return -1;
 287                 }
 288                 if (hapd->conf->ssid.wep.key[i] &&
 289                     i == hapd->conf->ssid.wep.idx)
 290                         hostapd_set_privacy(hapd, 1);
 291         }
 292
 293         return 0;
 294 }
 295
 296
 297 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 298 {
 299         int ret = 0;
 300
 301         if (hostapd_drv_none(hapd))
 302                 return 0;
 303
 304         wpa_printf(MSG_DEBUG, "Flushing old station entries");
 305         if (hostapd_flush(hapd)) {
 306                 wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
 307                 ret = -1;
 308         }
 309         wpa_printf(MSG_DEBUG, "Deauthenticate all stations");
 310
 311         /* New Prism2.5/3 STA firmware versions seem to have issues with this
 312          * broadcast deauth frame. This gets the firmware in odd state where
 313          * nothing works correctly, so let's skip sending this for the hostap
 314          * driver. */
 315         if (hapd->driver && os_strcmp(hapd->driver->name, "hostap") != 0) {
 316                 u8 addr[ETH_ALEN];
 317                 os_memset(addr, 0xff, ETH_ALEN);
 318                 hapd->drv.sta_deauth(hapd, addr,
 319                                      WLAN_REASON_PREV_AUTH_NOT_VALID);
 320         }
 321
 322         return ret;
 323 }
 324
 325
 326 /**
 327  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 328  * @iface: Pointer to interface data
 329  * Returns: 0 on success, -1 on failure
 330  *
 331  * This function is used to validate that the configured BSSIDs are valid.
 332  */
 333 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 334 {
 335         u8 mask[ETH_ALEN] = { 0 };
 336         struct hostapd_data *hapd = iface->bss[0];
 337         unsigned int i = iface->conf->num_bss, bits = 0, j;
 338         int res;
 339         int auto_addr = 0;
 340
 341         if (hostapd_drv_none(hapd))
 342                 return 0;
 343
 344         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 345
 346         /* Determine the bits necessary to cover the number of BSSIDs. */
 347         for (i--; i; i >>= 1)
 348                 bits++;
 349
 350         /* Determine the bits necessary to any configured BSSIDs,
 351            if they are higher than the number of BSSIDs. */
 352         for (j = 0; j < iface->conf->num_bss; j++) {
 353                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 354                         if (j)
 355                                 auto_addr++;
 356                         continue;
 357                 }
 358
 359                 for (i = 0; i < ETH_ALEN; i++) {
 360                         mask[i] |=
 361                                 iface->conf->bss[j].bssid[i] ^
 362                                 hapd->own_addr[i];
 363                 }
 364         }
 365
 366         if (!auto_addr)
 367                 goto skip_mask_ext;
 368
 369         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 370                 ;
 371         j = 0;
 372         if (i < ETH_ALEN) {
 373                 j = (5 - i) * 8;
 374
 375                 while (mask[i] != 0) {
 376                         mask[i] >>= 1;
 377                         j++;
 378                 }
 379         }
 380
 381         if (bits < j)
 382                 bits = j;
 383
 384         if (bits > 40) {
 385                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 386                            bits);
 387                 return -1;
 388         }
 389
 390         os_memset(mask, 0xff, ETH_ALEN);
 391         j = bits / 8;
 392         for (i = 5; i > 5 - j; i--)
 393                 mask[i] = 0;
 394         j = bits % 8;
 395         while (j--)
 396                 mask[i] <<= 1;
 397
 398 skip_mask_ext:
 399         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 400                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 401
 402         res = hostapd_valid_bss_mask(hapd, hapd->own_addr, mask);
 403         if (res == 0)
 404                 return 0;
 405
 406         if (res < 0) {
 407                 wpa_printf(MSG_ERROR, "Driver did not accept BSSID mask "
 408                            MACSTR " for start address " MACSTR ".",
 409                            MAC2STR(mask), MAC2STR(hapd->own_addr));
 410                 return -1;
 411         }
 412
 413         if (!auto_addr)
 414                 return 0;
 415
 416         for (i = 0; i < ETH_ALEN; i++) {
 417                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 418                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 419                                    " for start address " MACSTR ".",
 420                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 421                         wpa_printf(MSG_ERROR, "Start address must be the "
 422                                    "first address in the block (i.e., addr "
 423                                    "AND mask == addr).");
 424                         return -1;
 425                 }
 426         }
 427
 428         return 0;
 429 }
 430
 431
 432 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 433 {
 434         size_t i;
 435
 436         for (i = 0; i < conf->num_bss; i++) {
 437                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 438                         return 1;
 439                 }
 440         }
 441
 442         return 0;
 443 }
 444
 445
 446
 447
 448 /**
 449  * hostapd_setup_bss - Per-BSS setup (initialization)
 450  * @hapd: Pointer to BSS data
 451  * @first: Whether this BSS is the first BSS of an interface
 452  *
 453  * This function is used to initialize all per-BSS data structures and
 454  * resources. This gets called in a loop for each BSS when an interface is
 455  * initialized. Most of the modules that are initialized here will be
 456  * deinitialized in hostapd_cleanup().
 457  */
 458 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 459 {
 460         struct hostapd_bss_config *conf = hapd->conf;
 461         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 462         int ssid_len, set_ssid;
 463
 464         if (!first) {
 465                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 466                         /* Allocate the next available BSSID. */
 467                         do {
 468                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 469                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 470                 } else {
 471                         /* Allocate the configured BSSID. */
 472                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 473
 474                         if (hostapd_mac_comp(hapd->own_addr,
 475                                              hapd->iface->bss[0]->own_addr) ==
 476                             0) {
 477                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 478                                            "BSSID set to the MAC address of "
 479                                            "the radio", hapd->conf->iface);
 480                                 return -1;
 481                         }
 482                 }
 483
 484                 hapd->interface_added = 1;
 485                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 486                                    hapd->conf->iface, hapd->own_addr, hapd)) {
 487                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 488                                    MACSTR ")", MAC2STR(hapd->own_addr));
 489                         return -1;
 490                 }
 491         }
 492
 493         hostapd_flush_old_stations(hapd);
 494         hostapd_set_privacy(hapd, 0);
 495
 496         hostapd_broadcast_wep_clear(hapd);
 497         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 498                 return -1;
 499
 500         /*
 501          * Fetch the SSID from the system and use it or,
 502          * if one was specified in the config file, verify they
 503          * match.
 504          */
 505         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 506         if (ssid_len < 0) {
 507                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 508                 return -1;
 509         }
 510         if (conf->ssid.ssid_set) {
 511                 /*
 512                  * If SSID is specified in the config file and it differs
 513                  * from what is being used then force installation of the
 514                  * new SSID.
 515                  */
 516                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 517                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 518         } else {
 519                 /*
 520                  * No SSID in the config file; just use the one we got
 521                  * from the system.
 522                  */
 523                 set_ssid = 0;
 524                 conf->ssid.ssid_len = ssid_len;
 525                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 526                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 527         }
 528
 529         if (!hostapd_drv_none(hapd)) {
 530                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 531                            " and ssid '%s'",
 532                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 533                            hapd->conf->ssid.ssid);
 534         }
 535
 536         if (hostapd_setup_wpa_psk(conf)) {
 537                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 538                 return -1;
 539         }
 540
 541         /* Set SSID for the kernel driver (to be used in beacon and probe
 542          * response frames) */
 543         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 544                                          conf->ssid.ssid_len)) {
 545                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 546                 return -1;
 547         }
 548
 549         if (wpa_debug_level == MSG_MSGDUMP)
 550                 conf->radius->msg_dumps = 1;
 551 #ifndef CONFIG_NO_RADIUS
 552         hapd->radius = radius_client_init(hapd, conf->radius);
 553         if (hapd->radius == NULL) {
 554                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 555                 return -1;
 556         }
 557 #endif /* CONFIG_NO_RADIUS */
 558
 559         if (hostapd_acl_init(hapd)) {
 560                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 561                 return -1;
 562         }
 563         if (hostapd_init_wps(hapd, conf))
 564                 return -1;
 565
 566         if (ieee802_1x_init(hapd)) {
 567                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 568                 return -1;
 569         }
 570
 571         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 572                 return -1;
 573
 574         if (accounting_init(hapd)) {
 575                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 576                 return -1;
 577         }
 578
 579         if (hapd->conf->ieee802_11f &&
 580             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 581                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 582                            "failed.");
 583                 return -1;
 584         }
 585
 586         if (hostapd_ctrl_iface_init(hapd)) {
 587                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 588                 return -1;
 589         }
 590
 591         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 592                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 593                 return -1;
 594         }
 595
 596         ieee802_11_set_beacon(hapd);
 597
 598         if (authsrv_init(hapd) < 0)
 599                 return -1;
 600
 601         return 0;
 602 }
 603
 604
 605 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 606 {
 607         struct hostapd_data *hapd = iface->bss[0];
 608         int i;
 609         struct hostapd_tx_queue_params *p;
 610
 611         for (i = 0; i < NUM_TX_QUEUES; i++) {
 612                 p = &iface->conf->tx_queue[i];
 613
 614                 if (!p->configured)
 615                         continue;
 616
 617                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 618                                                 p->cwmax, p->burst)) {
 619                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 620                                    "parameters for queue %d.", i);
 621                         /* Continue anyway */
 622                 }
 623         }
 624 }
 625
 626
 627 static int setup_interface(struct hostapd_iface *iface)
 628 {
 629         struct hostapd_data *hapd = iface->bss[0];
 630         size_t i;
 631         char country[4];
 632
 633         /*
 634          * Make sure that all BSSes get configured with a pointer to the same
 635          * driver interface.
 636          */
 637         for (i = 1; i < iface->num_bss; i++) {
 638                 iface->bss[i]->driver = hapd->driver;
 639                 iface->bss[i]->drv_priv = hapd->drv_priv;
 640         }
 641
 642         if (hostapd_validate_bssid_configuration(iface))
 643                 return -1;
 644
 645         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 646                 os_memcpy(country, hapd->iconf->country, 3);
 647                 country[3] = '\0';
 648                 if (hostapd_set_country(hapd, country) < 0) {
 649                         wpa_printf(MSG_ERROR, "Failed to set country code");
 650                         return -1;
 651                 }
 652         }
 653
 654         if (hostapd_get_hw_features(iface)) {
 655                 /* Not all drivers support this yet, so continue without hw
 656                  * feature data. */
 657         } else {
 658                 int ret = hostapd_select_hw_mode(iface);
 659                 if (ret < 0) {
 660                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 661                                    "channel. (%d)", ret);
 662                         return -1;
 663                 }
 664                 ret = hostapd_check_ht_capab(iface);
 665                 if (ret < 0)
 666                         return -1;
 667                 if (ret == 1) {
 668                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 669                                    "be completed in a callback");
 670                         return 0;
 671                 }
 672         }
 673         return hostapd_setup_interface_complete(iface, 0);
 674 }
 675
 676
 677 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 678 {
 679         struct hostapd_data *hapd = iface->bss[0];
 680         int freq;
 681         size_t j;
 682         u8 *prev_addr;
 683
 684         if (err) {
 685                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 686                 eloop_terminate();
 687                 return -1;
 688         }
 689
 690         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 691         if (hapd->iconf->channel) {
 692                 freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 693                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 694                            "Frequency: %d MHz",
 695                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 696                            hapd->iconf->channel, freq);
 697
 698                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, freq,
 699                                      hapd->iconf->channel,
 700                                      hapd->iconf->ieee80211n,
 701                                      hapd->iconf->secondary_channel)) {
 702                         wpa_printf(MSG_ERROR, "Could not set channel for "
 703                                    "kernel driver");
 704                         return -1;
 705                 }
 706         }
 707
 708         if (hapd->iconf->rts_threshold > -1 &&
 709             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 710                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 711                            "kernel driver");
 712                 return -1;
 713         }
 714
 715         if (hapd->iconf->fragm_threshold > -1 &&
 716             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 717                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 718                            "for kernel driver");
 719                 return -1;
 720         }
 721
 722         prev_addr = hapd->own_addr;
 723
 724         for (j = 0; j < iface->num_bss; j++) {
 725                 hapd = iface->bss[j];
 726                 if (j)
 727                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 728                 if (hostapd_setup_bss(hapd, j == 0))
 729                         return -1;
 730                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 731                         prev_addr = hapd->own_addr;
 732         }
 733
 734         hostapd_tx_queue_params(iface);
 735
 736         ap_list_init(iface);
 737
 738         if (hostapd_driver_commit(hapd) < 0) {
 739                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 740                            "configuration", __func__);
 741                 return -1;
 742         }
 743
 744         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 745                    iface->bss[0]->conf->iface);
 746
 747         return 0;
 748 }
 749
 750
 751 /**
 752  * hostapd_setup_interface - Setup of an interface
 753  * @iface: Pointer to interface data.
 754  * Returns: 0 on success, -1 on failure
 755  *
 756  * Initializes the driver interface, validates the configuration,
 757  * and sets driver parameters based on the configuration.
 758  * Flushes old stations, sets the channel, encryption,
 759  * beacons, and WDS links based on the configuration.
 760  */
 761 int hostapd_setup_interface(struct hostapd_iface *iface)
 762 {
 763         int ret;
 764
 765         ret = setup_interface(iface);
 766         if (ret) {
 767                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 768                            iface->bss[0]->conf->iface);
 769                 return -1;
 770         }
 771
 772         return 0;
 773 }
 774
 775
 776 /**
 777  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 778  * @hapd_iface: Pointer to interface data
 779  * @conf: Pointer to per-interface configuration
 780  * @bss: Pointer to per-BSS configuration for this BSS
 781  * Returns: Pointer to allocated BSS data
 782  *
 783  * This function is used to allocate per-BSS data structure. This data will be
 784  * freed after hostapd_cleanup() is called for it during interface
 785  * deinitialization.
 786  */
 787 struct hostapd_data *
 788 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 789                        struct hostapd_config *conf,
 790                        struct hostapd_bss_config *bss)
 791 {
 792         struct hostapd_data *hapd;
 793
 794         hapd = os_zalloc(sizeof(*hapd));
 795         if (hapd == NULL)
 796                 return NULL;
 797
 798         hostapd_set_driver_ops(&hapd->drv);
 799         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 800         hapd->iconf = conf;
 801         hapd->conf = bss;
 802         hapd->iface = hapd_iface;
 803         hapd->driver = hapd->iconf->driver;
 804
 805         return hapd;
 806 }
 807
 808
 809 void hostapd_interface_deinit(struct hostapd_iface *iface)
 810 {
 811         size_t j;
 812
 813         if (iface == NULL)
 814                 return;
 815
 816         hostapd_cleanup_iface_pre(iface);
 817         for (j = 0; j < iface->num_bss; j++) {
 818                 struct hostapd_data *hapd = iface->bss[j];
 819                 hostapd_free_stas(hapd);
 820                 hostapd_flush_old_stations(hapd);
 821                 hostapd_cleanup(hapd);
 822         }
 823         for (j = 0; j < iface->num_bss; j++)
 824                 os_free(iface->bss[j]);
 825         hostapd_cleanup_iface(iface);
 826 }
 827
 828
 829 /**
 830  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 831  * @hapd: Pointer to BSS data
 832  * @sta: Pointer to the associated STA data
 833  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 834  *
 835  * This function will be called whenever a station associates with the AP. It
 836  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 837  * from drv_callbacks.c based on driver events for drivers that take care of
 838  * management frames (IEEE 802.11 authentication and association) internally.
 839  */
 840 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 841                            int reassoc)
 842 {
 843         if (hapd->tkip_countermeasures) {
 844                 hapd->drv.sta_deauth(hapd, sta->addr,
 845                                      WLAN_REASON_MICHAEL_MIC_FAILURE);
 846                 return;
 847         }
 848
 849         hostapd_prune_associations(hapd, sta->addr);
 850
 851         /* IEEE 802.11F (IAPP) */
 852         if (hapd->conf->ieee802_11f)
 853                 iapp_new_station(hapd->iapp, sta);
 854
 855         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 856          * IEEE 802.1X/WPA code will start accounting after the station has
 857          * been authorized. */
 858         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 859                 accounting_sta_start(hapd, sta);
 860
 861         /* Start IEEE 802.1X authentication process for new stations */
 862         ieee802_1x_new_station(hapd, sta);
 863         if (reassoc) {
 864                 if (sta->auth_alg != WLAN_AUTH_FT &&
 865                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 866                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 867         } else
 868                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 869 }